Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
61baf725 | 3 | Copyright (C) 1994-2017 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 | 55 | #include "typeprint.h" |
ccefe4c4 | 56 | #include "psympriv.h" |
53ce3c39 | 57 | #include <sys/stat.h> |
96d19272 | 58 | #include "completer.h" |
34eaf542 | 59 | #include "vec.h" |
98bfdba5 | 60 | #include "c-lang.h" |
a766d390 | 61 | #include "go-lang.h" |
98bfdba5 | 62 | #include "valprint.h" |
3019eac3 | 63 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 64 | #include "gdb/gdb-index.h" |
60d5a603 | 65 | #include <ctype.h> |
cbb099e8 | 66 | #include "gdb_bfd.h" |
4357ac6c | 67 | #include "f-lang.h" |
05cba821 | 68 | #include "source.h" |
614c279d | 69 | #include "filestuff.h" |
dc294be5 | 70 | #include "build-id.h" |
22cee43f | 71 | #include "namespace.h" |
bef155c3 | 72 | #include "common/gdb_unlinker.h" |
14bc53a8 | 73 | #include "common/function-view.h" |
ecfb656c PA |
74 | #include "common/gdb_optional.h" |
75 | #include "common/underlying.h" | |
d5722aa2 | 76 | #include "common/byte-vector.h" |
927aa2e7 | 77 | #include "common/hash_enum.h" |
bbf2f4df | 78 | #include "filename-seen-cache.h" |
b32b108a | 79 | #include "producer.h" |
c906108c | 80 | #include <fcntl.h> |
c906108c | 81 | #include <sys/types.h> |
325fac50 | 82 | #include <algorithm> |
bc8f2430 JK |
83 | #include <unordered_set> |
84 | #include <unordered_map> | |
c62446b1 | 85 | #include "selftest.h" |
437afbb8 JK |
86 | #include <cmath> |
87 | #include <set> | |
88 | #include <forward_list> | |
89 | ||
90 | typedef struct symbol *symbolp; | |
91 | DEF_VEC_P (symbolp); | |
d8151005 | 92 | |
73be47f5 DE |
93 | /* When == 1, print basic high level tracing messages. |
94 | When > 1, be more verbose. | |
b4f54984 DE |
95 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
96 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 97 | |
d97bc12b | 98 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 99 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 100 | |
27e0867f DE |
101 | /* When non-zero, dump line number entries as they are read in. */ |
102 | static unsigned int dwarf_line_debug = 0; | |
103 | ||
900e11f9 JK |
104 | /* When non-zero, cross-check physname against demangler. */ |
105 | static int check_physname = 0; | |
106 | ||
481860b3 | 107 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 108 | static int use_deprecated_index_sections = 0; |
481860b3 | 109 | |
6502dd73 DJ |
110 | static const struct objfile_data *dwarf2_objfile_data_key; |
111 | ||
f1e6e072 TT |
112 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
113 | ||
114 | static int dwarf2_locexpr_index; | |
115 | static int dwarf2_loclist_index; | |
116 | static int dwarf2_locexpr_block_index; | |
117 | static int dwarf2_loclist_block_index; | |
118 | ||
73869dc2 DE |
119 | /* A descriptor for dwarf sections. |
120 | ||
121 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
122 | scanned. BUFFER, READIN are filled in later when the section is read. | |
123 | If the section contained compressed data then SIZE is updated to record | |
124 | the uncompressed size of the section. | |
125 | ||
126 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
127 | creating the concept of virtual sections contained within a real section. | |
128 | In DWP V2 the sections of the input DWO files are concatenated together | |
129 | into one section, but section offsets are kept relative to the original | |
130 | input section. | |
131 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
132 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
133 | describe the virtual section. */ | |
134 | ||
dce234bc PP |
135 | struct dwarf2_section_info |
136 | { | |
73869dc2 DE |
137 | union |
138 | { | |
e5aa3347 | 139 | /* If this is a real section, the bfd section. */ |
049412e3 | 140 | asection *section; |
73869dc2 | 141 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 142 | section. */ |
73869dc2 DE |
143 | struct dwarf2_section_info *containing_section; |
144 | } s; | |
19ac8c2e | 145 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 146 | const gdb_byte *buffer; |
73869dc2 | 147 | /* The size of the section, real or virtual. */ |
dce234bc | 148 | bfd_size_type size; |
73869dc2 DE |
149 | /* If this is a virtual section, the offset in the real section. |
150 | Only valid if is_virtual. */ | |
151 | bfd_size_type virtual_offset; | |
be391dca | 152 | /* True if we have tried to read this section. */ |
73869dc2 DE |
153 | char readin; |
154 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 155 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 156 | char is_virtual; |
dce234bc PP |
157 | }; |
158 | ||
8b70b953 TT |
159 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
160 | DEF_VEC_O (dwarf2_section_info_def); | |
161 | ||
9291a0cd TT |
162 | /* All offsets in the index are of this type. It must be |
163 | architecture-independent. */ | |
164 | typedef uint32_t offset_type; | |
165 | ||
166 | DEF_VEC_I (offset_type); | |
167 | ||
156942c7 DE |
168 | /* Ensure only legit values are used. */ |
169 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
170 | do { \ | |
171 | gdb_assert ((unsigned int) (value) <= 1); \ | |
172 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
173 | } while (0) | |
174 | ||
175 | /* Ensure only legit values are used. */ | |
176 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
177 | do { \ | |
178 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
179 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
180 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
181 | } while (0) | |
182 | ||
183 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
184 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
185 | do { \ | |
186 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
187 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
188 | } while (0) | |
189 | ||
3f563c84 PA |
190 | #if WORDS_BIGENDIAN |
191 | ||
192 | /* Convert VALUE between big- and little-endian. */ | |
193 | ||
194 | static offset_type | |
195 | byte_swap (offset_type value) | |
196 | { | |
197 | offset_type result; | |
198 | ||
199 | result = (value & 0xff) << 24; | |
200 | result |= (value & 0xff00) << 8; | |
201 | result |= (value & 0xff0000) >> 8; | |
202 | result |= (value & 0xff000000) >> 24; | |
203 | return result; | |
204 | } | |
205 | ||
206 | #define MAYBE_SWAP(V) byte_swap (V) | |
207 | ||
208 | #else | |
209 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) | |
210 | #endif /* WORDS_BIGENDIAN */ | |
211 | ||
212 | /* An index into a (C++) symbol name component in a symbol name as | |
213 | recorded in the mapped_index's symbol table. For each C++ symbol | |
214 | in the symbol table, we record one entry for the start of each | |
215 | component in the symbol in a table of name components, and then | |
216 | sort the table, in order to be able to binary search symbol names, | |
217 | ignoring leading namespaces, both completion and regular look up. | |
218 | For example, for symbol "A::B::C", we'll have an entry that points | |
219 | to "A::B::C", another that points to "B::C", and another for "C". | |
220 | Note that function symbols in GDB index have no parameter | |
221 | information, just the function/method names. You can convert a | |
222 | name_component to a "const char *" using the | |
223 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
224 | ||
225 | struct name_component | |
226 | { | |
227 | /* Offset in the symbol name where the component starts. Stored as | |
228 | a (32-bit) offset instead of a pointer to save memory and improve | |
229 | locality on 64-bit architectures. */ | |
230 | offset_type name_offset; | |
231 | ||
232 | /* The symbol's index in the symbol and constant pool tables of a | |
233 | mapped_index. */ | |
234 | offset_type idx; | |
235 | }; | |
236 | ||
44ed8f3e PA |
237 | /* Base class containing bits shared by both .gdb_index and |
238 | .debug_name indexes. */ | |
239 | ||
240 | struct mapped_index_base | |
241 | { | |
242 | /* The name_component table (a sorted vector). See name_component's | |
243 | description above. */ | |
244 | std::vector<name_component> name_components; | |
245 | ||
246 | /* How NAME_COMPONENTS is sorted. */ | |
247 | enum case_sensitivity name_components_casing; | |
248 | ||
249 | /* Return the number of names in the symbol table. */ | |
250 | virtual size_t symbol_name_count () const = 0; | |
251 | ||
252 | /* Get the name of the symbol at IDX in the symbol table. */ | |
253 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
254 | ||
255 | /* Return whether the name at IDX in the symbol table should be | |
256 | ignored. */ | |
257 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
258 | { | |
259 | return false; | |
260 | } | |
261 | ||
262 | /* Build the symbol name component sorted vector, if we haven't | |
263 | yet. */ | |
264 | void build_name_components (); | |
265 | ||
266 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
267 | possible matches for LN_NO_PARAMS in the name component | |
268 | vector. */ | |
269 | std::pair<std::vector<name_component>::const_iterator, | |
270 | std::vector<name_component>::const_iterator> | |
271 | find_name_components_bounds (const lookup_name_info &ln_no_params) const; | |
272 | ||
273 | /* Prevent deleting/destroying via a base class pointer. */ | |
274 | protected: | |
275 | ~mapped_index_base() = default; | |
276 | }; | |
277 | ||
9291a0cd TT |
278 | /* A description of the mapped index. The file format is described in |
279 | a comment by the code that writes the index. */ | |
44ed8f3e | 280 | struct mapped_index : public mapped_index_base |
9291a0cd | 281 | { |
f00a2de2 PA |
282 | /* A slot/bucket in the symbol table hash. */ |
283 | struct symbol_table_slot | |
284 | { | |
285 | const offset_type name; | |
286 | const offset_type vec; | |
287 | }; | |
288 | ||
559a7a62 JK |
289 | /* Index data format version. */ |
290 | int version; | |
291 | ||
9291a0cd TT |
292 | /* The total length of the buffer. */ |
293 | off_t total_size; | |
b11b1f88 | 294 | |
f00a2de2 PA |
295 | /* The address table data. */ |
296 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 297 | |
3876f04e | 298 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 299 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 300 | |
9291a0cd TT |
301 | /* A pointer to the constant pool. */ |
302 | const char *constant_pool; | |
3f563c84 | 303 | |
44ed8f3e PA |
304 | bool symbol_name_slot_invalid (offset_type idx) const override |
305 | { | |
306 | const auto &bucket = this->symbol_table[idx]; | |
307 | return bucket.name == 0 && bucket.vec; | |
308 | } | |
5c58de74 | 309 | |
3f563c84 PA |
310 | /* Convenience method to get at the name of the symbol at IDX in the |
311 | symbol table. */ | |
44ed8f3e | 312 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 313 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 314 | |
44ed8f3e PA |
315 | size_t symbol_name_count () const override |
316 | { return this->symbol_table.size (); } | |
9291a0cd TT |
317 | }; |
318 | ||
927aa2e7 JK |
319 | /* A description of the mapped .debug_names. |
320 | Uninitialized map has CU_COUNT 0. */ | |
44ed8f3e | 321 | struct mapped_debug_names : public mapped_index_base |
927aa2e7 JK |
322 | { |
323 | bfd_endian dwarf5_byte_order; | |
324 | bool dwarf5_is_dwarf64; | |
325 | bool augmentation_is_gdb; | |
326 | uint8_t offset_size; | |
327 | uint32_t cu_count = 0; | |
328 | uint32_t tu_count, bucket_count, name_count; | |
329 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
330 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
331 | const gdb_byte *name_table_string_offs_reordered; | |
332 | const gdb_byte *name_table_entry_offs_reordered; | |
333 | const gdb_byte *entry_pool; | |
334 | ||
335 | struct index_val | |
336 | { | |
337 | ULONGEST dwarf_tag; | |
338 | struct attr | |
339 | { | |
340 | /* Attribute name DW_IDX_*. */ | |
341 | ULONGEST dw_idx; | |
342 | ||
343 | /* Attribute form DW_FORM_*. */ | |
344 | ULONGEST form; | |
345 | ||
346 | /* Value if FORM is DW_FORM_implicit_const. */ | |
347 | LONGEST implicit_const; | |
348 | }; | |
349 | std::vector<attr> attr_vec; | |
350 | }; | |
351 | ||
352 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
353 | ||
354 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
355 | |
356 | /* Implementation of the mapped_index_base virtual interface, for | |
357 | the name_components cache. */ | |
358 | ||
359 | const char *symbol_name_at (offset_type idx) const override | |
360 | { return namei_to_name (idx); } | |
361 | ||
362 | size_t symbol_name_count () const override | |
363 | { return this->name_count; } | |
927aa2e7 JK |
364 | }; |
365 | ||
95554aad TT |
366 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
367 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
368 | ||
52059ffd TT |
369 | struct tu_stats |
370 | { | |
371 | int nr_uniq_abbrev_tables; | |
372 | int nr_symtabs; | |
373 | int nr_symtab_sharers; | |
374 | int nr_stmt_less_type_units; | |
375 | int nr_all_type_units_reallocs; | |
376 | }; | |
377 | ||
9cdd5dbd DE |
378 | /* Collection of data recorded per objfile. |
379 | This hangs off of dwarf2_objfile_data_key. */ | |
380 | ||
6502dd73 DJ |
381 | struct dwarf2_per_objfile |
382 | { | |
330cdd98 PA |
383 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
384 | dwarf2 section names, or is NULL if the standard ELF names are | |
385 | used. */ | |
386 | dwarf2_per_objfile (struct objfile *objfile, | |
387 | const dwarf2_debug_sections *names); | |
ae038cb0 | 388 | |
330cdd98 PA |
389 | ~dwarf2_per_objfile (); |
390 | ||
d6541620 | 391 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
392 | |
393 | /* Free all cached compilation units. */ | |
394 | void free_cached_comp_units (); | |
395 | private: | |
396 | /* This function is mapped across the sections and remembers the | |
397 | offset and size of each of the debugging sections we are | |
398 | interested in. */ | |
399 | void locate_sections (bfd *abfd, asection *sectp, | |
400 | const dwarf2_debug_sections &names); | |
401 | ||
402 | public: | |
403 | dwarf2_section_info info {}; | |
404 | dwarf2_section_info abbrev {}; | |
405 | dwarf2_section_info line {}; | |
406 | dwarf2_section_info loc {}; | |
407 | dwarf2_section_info loclists {}; | |
408 | dwarf2_section_info macinfo {}; | |
409 | dwarf2_section_info macro {}; | |
410 | dwarf2_section_info str {}; | |
411 | dwarf2_section_info line_str {}; | |
412 | dwarf2_section_info ranges {}; | |
413 | dwarf2_section_info rnglists {}; | |
414 | dwarf2_section_info addr {}; | |
415 | dwarf2_section_info frame {}; | |
416 | dwarf2_section_info eh_frame {}; | |
417 | dwarf2_section_info gdb_index {}; | |
927aa2e7 JK |
418 | dwarf2_section_info debug_names {}; |
419 | dwarf2_section_info debug_aranges {}; | |
330cdd98 PA |
420 | |
421 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 422 | |
be391dca | 423 | /* Back link. */ |
330cdd98 | 424 | struct objfile *objfile = NULL; |
be391dca | 425 | |
d467dd73 | 426 | /* Table of all the compilation units. This is used to locate |
10b3939b | 427 | the target compilation unit of a particular reference. */ |
330cdd98 | 428 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
429 | |
430 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 431 | int n_comp_units = 0; |
ae038cb0 | 432 | |
1fd400ff | 433 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 434 | int n_type_units = 0; |
1fd400ff | 435 | |
6aa5f3a6 DE |
436 | /* The number of elements allocated in all_type_units. |
437 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 438 | int n_allocated_type_units = 0; |
6aa5f3a6 | 439 | |
a2ce51a0 DE |
440 | /* The .debug_types-related CUs (TUs). |
441 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 442 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 443 | |
f4dc4d17 DE |
444 | /* Table of struct type_unit_group objects. |
445 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 446 | htab_t type_unit_groups {}; |
72dca2f5 | 447 | |
348e048f DE |
448 | /* A table mapping .debug_types signatures to its signatured_type entry. |
449 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 450 | htab_t signatured_types {}; |
348e048f | 451 | |
f4dc4d17 DE |
452 | /* Type unit statistics, to see how well the scaling improvements |
453 | are doing. */ | |
330cdd98 | 454 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
455 | |
456 | /* A chain of compilation units that are currently read in, so that | |
457 | they can be freed later. */ | |
330cdd98 | 458 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 459 | |
3019eac3 DE |
460 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
461 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 462 | htab_t dwo_files {}; |
3019eac3 | 463 | |
330cdd98 PA |
464 | /* True if we've checked for whether there is a DWP file. */ |
465 | bool dwp_checked = false; | |
80626a55 DE |
466 | |
467 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 468 | struct dwp_file *dwp_file = NULL; |
80626a55 | 469 | |
36586728 TT |
470 | /* The shared '.dwz' file, if one exists. This is used when the |
471 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 472 | struct dwz_file *dwz_file = NULL; |
36586728 | 473 | |
330cdd98 | 474 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 475 | VMA of 0. */ |
330cdd98 | 476 | bool has_section_at_zero = false; |
9291a0cd | 477 | |
ae2de4f8 DE |
478 | /* True if we are using the mapped index, |
479 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 480 | bool using_index = false; |
9291a0cd | 481 | |
ae2de4f8 | 482 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 483 | mapped_index *index_table = NULL; |
98bfdba5 | 484 | |
927aa2e7 JK |
485 | /* The mapped index, or NULL if .debug_names is missing or not being used. */ |
486 | std::unique_ptr<mapped_debug_names> debug_names_table; | |
487 | ||
7b9f3c50 | 488 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
489 | TUs typically share line table entries with a CU, so we maintain a |
490 | separate table of all line table entries to support the sharing. | |
491 | Note that while there can be way more TUs than CUs, we've already | |
492 | sorted all the TUs into "type unit groups", grouped by their | |
493 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
494 | CU and its associated TU group if there is one. */ | |
330cdd98 | 495 | htab_t quick_file_names_table {}; |
7b9f3c50 | 496 | |
98bfdba5 PA |
497 | /* Set during partial symbol reading, to prevent queueing of full |
498 | symbols. */ | |
330cdd98 | 499 | bool reading_partial_symbols = false; |
673bfd45 | 500 | |
dee91e82 | 501 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 502 | This is NULL if not allocated yet. |
02142a6c | 503 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 504 | htab_t die_type_hash {}; |
95554aad TT |
505 | |
506 | /* The CUs we recently read. */ | |
330cdd98 | 507 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
508 | |
509 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 510 | htab_t line_header_hash {}; |
bbf2f4df PA |
511 | |
512 | /* Table containing all filenames. This is an optional because the | |
513 | table is lazily constructed on first access. */ | |
514 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
515 | }; |
516 | ||
517 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 518 | |
251d32d9 | 519 | /* Default names of the debugging sections. */ |
c906108c | 520 | |
233a11ab CS |
521 | /* Note that if the debugging section has been compressed, it might |
522 | have a name like .zdebug_info. */ | |
523 | ||
9cdd5dbd DE |
524 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
525 | { | |
251d32d9 TG |
526 | { ".debug_info", ".zdebug_info" }, |
527 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
528 | { ".debug_line", ".zdebug_line" }, | |
529 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 530 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 531 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 532 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 533 | { ".debug_str", ".zdebug_str" }, |
43988095 | 534 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 535 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 536 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 537 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 538 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
539 | { ".debug_frame", ".zdebug_frame" }, |
540 | { ".eh_frame", NULL }, | |
24d3216f | 541 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
542 | { ".debug_names", ".zdebug_names" }, |
543 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 544 | 23 |
251d32d9 | 545 | }; |
c906108c | 546 | |
80626a55 | 547 | /* List of DWO/DWP sections. */ |
3019eac3 | 548 | |
80626a55 | 549 | static const struct dwop_section_names |
3019eac3 DE |
550 | { |
551 | struct dwarf2_section_names abbrev_dwo; | |
552 | struct dwarf2_section_names info_dwo; | |
553 | struct dwarf2_section_names line_dwo; | |
554 | struct dwarf2_section_names loc_dwo; | |
43988095 | 555 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
556 | struct dwarf2_section_names macinfo_dwo; |
557 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
558 | struct dwarf2_section_names str_dwo; |
559 | struct dwarf2_section_names str_offsets_dwo; | |
560 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
561 | struct dwarf2_section_names cu_index; |
562 | struct dwarf2_section_names tu_index; | |
3019eac3 | 563 | } |
80626a55 | 564 | dwop_section_names = |
3019eac3 DE |
565 | { |
566 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
567 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
568 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
569 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 570 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
571 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
572 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
573 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
574 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
575 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
576 | { ".debug_cu_index", ".zdebug_cu_index" }, |
577 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
578 | }; |
579 | ||
c906108c SS |
580 | /* local data types */ |
581 | ||
107d2387 AC |
582 | /* The data in a compilation unit header, after target2host |
583 | translation, looks like this. */ | |
c906108c | 584 | struct comp_unit_head |
a738430d | 585 | { |
c764a876 | 586 | unsigned int length; |
a738430d | 587 | short version; |
a738430d MK |
588 | unsigned char addr_size; |
589 | unsigned char signed_addr_p; | |
9c541725 | 590 | sect_offset abbrev_sect_off; |
57349743 | 591 | |
a738430d MK |
592 | /* Size of file offsets; either 4 or 8. */ |
593 | unsigned int offset_size; | |
57349743 | 594 | |
a738430d MK |
595 | /* Size of the length field; either 4 or 12. */ |
596 | unsigned int initial_length_size; | |
57349743 | 597 | |
43988095 JK |
598 | enum dwarf_unit_type unit_type; |
599 | ||
a738430d MK |
600 | /* Offset to the first byte of this compilation unit header in the |
601 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 602 | sect_offset sect_off; |
57349743 | 603 | |
d00adf39 DE |
604 | /* Offset to first die in this cu from the start of the cu. |
605 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 606 | cu_offset first_die_cu_offset; |
43988095 JK |
607 | |
608 | /* 64-bit signature of this type unit - it is valid only for | |
609 | UNIT_TYPE DW_UT_type. */ | |
610 | ULONGEST signature; | |
611 | ||
612 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 613 | cu_offset type_cu_offset_in_tu; |
a738430d | 614 | }; |
c906108c | 615 | |
3da10d80 KS |
616 | /* Type used for delaying computation of method physnames. |
617 | See comments for compute_delayed_physnames. */ | |
618 | struct delayed_method_info | |
619 | { | |
620 | /* The type to which the method is attached, i.e., its parent class. */ | |
621 | struct type *type; | |
622 | ||
623 | /* The index of the method in the type's function fieldlists. */ | |
624 | int fnfield_index; | |
625 | ||
626 | /* The index of the method in the fieldlist. */ | |
627 | int index; | |
628 | ||
629 | /* The name of the DIE. */ | |
630 | const char *name; | |
631 | ||
632 | /* The DIE associated with this method. */ | |
633 | struct die_info *die; | |
634 | }; | |
635 | ||
636 | typedef struct delayed_method_info delayed_method_info; | |
637 | DEF_VEC_O (delayed_method_info); | |
638 | ||
e7c27a73 DJ |
639 | /* Internal state when decoding a particular compilation unit. */ |
640 | struct dwarf2_cu | |
641 | { | |
642 | /* The objfile containing this compilation unit. */ | |
643 | struct objfile *objfile; | |
644 | ||
d00adf39 | 645 | /* The header of the compilation unit. */ |
e7c27a73 | 646 | struct comp_unit_head header; |
e142c38c | 647 | |
d00adf39 DE |
648 | /* Base address of this compilation unit. */ |
649 | CORE_ADDR base_address; | |
650 | ||
651 | /* Non-zero if base_address has been set. */ | |
652 | int base_known; | |
653 | ||
e142c38c DJ |
654 | /* The language we are debugging. */ |
655 | enum language language; | |
656 | const struct language_defn *language_defn; | |
657 | ||
b0f35d58 DL |
658 | const char *producer; |
659 | ||
e142c38c DJ |
660 | /* The generic symbol table building routines have separate lists for |
661 | file scope symbols and all all other scopes (local scopes). So | |
662 | we need to select the right one to pass to add_symbol_to_list(). | |
663 | We do it by keeping a pointer to the correct list in list_in_scope. | |
664 | ||
665 | FIXME: The original dwarf code just treated the file scope as the | |
666 | first local scope, and all other local scopes as nested local | |
667 | scopes, and worked fine. Check to see if we really need to | |
668 | distinguish these in buildsym.c. */ | |
669 | struct pending **list_in_scope; | |
670 | ||
433df2d4 DE |
671 | /* The abbrev table for this CU. |
672 | Normally this points to the abbrev table in the objfile. | |
673 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
674 | struct abbrev_table *abbrev_table; | |
72bf9492 | 675 | |
b64f50a1 JK |
676 | /* Hash table holding all the loaded partial DIEs |
677 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
678 | htab_t partial_dies; |
679 | ||
680 | /* Storage for things with the same lifetime as this read-in compilation | |
681 | unit, including partial DIEs. */ | |
682 | struct obstack comp_unit_obstack; | |
683 | ||
ae038cb0 DJ |
684 | /* When multiple dwarf2_cu structures are living in memory, this field |
685 | chains them all together, so that they can be released efficiently. | |
686 | We will probably also want a generation counter so that most-recently-used | |
687 | compilation units are cached... */ | |
688 | struct dwarf2_per_cu_data *read_in_chain; | |
689 | ||
69d751e3 | 690 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
691 | struct dwarf2_per_cu_data *per_cu; |
692 | ||
693 | /* How many compilation units ago was this CU last referenced? */ | |
694 | int last_used; | |
695 | ||
b64f50a1 JK |
696 | /* A hash table of DIE cu_offset for following references with |
697 | die_info->offset.sect_off as hash. */ | |
51545339 | 698 | htab_t die_hash; |
10b3939b DJ |
699 | |
700 | /* Full DIEs if read in. */ | |
701 | struct die_info *dies; | |
702 | ||
703 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
704 | units referenced by this one. Only set during full symbol processing; | |
705 | partial symbol tables do not have dependencies. */ | |
706 | htab_t dependencies; | |
707 | ||
cb1df416 DJ |
708 | /* Header data from the line table, during full symbol processing. */ |
709 | struct line_header *line_header; | |
4c8aa72d PA |
710 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
711 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
712 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
713 | to the line header as long as this DIE is being processed. See | |
714 | process_die_scope. */ | |
715 | die_info *line_header_die_owner; | |
cb1df416 | 716 | |
3da10d80 KS |
717 | /* A list of methods which need to have physnames computed |
718 | after all type information has been read. */ | |
719 | VEC (delayed_method_info) *method_list; | |
720 | ||
96408a79 SA |
721 | /* To be copied to symtab->call_site_htab. */ |
722 | htab_t call_site_htab; | |
723 | ||
034e5797 DE |
724 | /* Non-NULL if this CU came from a DWO file. |
725 | There is an invariant here that is important to remember: | |
726 | Except for attributes copied from the top level DIE in the "main" | |
727 | (or "stub") file in preparation for reading the DWO file | |
728 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
729 | Either there isn't a DWO file (in which case this is NULL and the point | |
730 | is moot), or there is and either we're not going to read it (in which | |
731 | case this is NULL) or there is and we are reading it (in which case this | |
732 | is non-NULL). */ | |
3019eac3 DE |
733 | struct dwo_unit *dwo_unit; |
734 | ||
735 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
736 | (zero is a valid value though). | |
1dbab08b | 737 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
738 | ULONGEST addr_base; |
739 | ||
2e3cf129 DE |
740 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
741 | (zero is a valid value though). | |
1dbab08b | 742 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 743 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
744 | be used without needing to know whether DWO files are in use or not. |
745 | N.B. This does not apply to DW_AT_ranges appearing in | |
746 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
747 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
748 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
749 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
750 | ULONGEST ranges_base; |
751 | ||
ae038cb0 DJ |
752 | /* Mark used when releasing cached dies. */ |
753 | unsigned int mark : 1; | |
754 | ||
8be455d7 JK |
755 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
756 | This test is imperfect as there may exist optimized debug code not using | |
757 | any location list and still facing inlining issues if handled as | |
758 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 759 | unsigned int has_loclist : 1; |
ba919b58 | 760 | |
1b80a9fa JK |
761 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
762 | if all the producer_is_* fields are valid. This information is cached | |
763 | because profiling CU expansion showed excessive time spent in | |
764 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
765 | unsigned int checked_producer : 1; |
766 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 767 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 768 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
769 | |
770 | /* When set, the file that we're processing is known to have | |
771 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
772 | this information, but later versions do. */ | |
773 | ||
774 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
775 | }; |
776 | ||
10b3939b DJ |
777 | /* Persistent data held for a compilation unit, even when not |
778 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 779 | read_symtab_private field of the psymtab. */ |
10b3939b | 780 | |
ae038cb0 DJ |
781 | struct dwarf2_per_cu_data |
782 | { | |
36586728 | 783 | /* The start offset and length of this compilation unit. |
45452591 | 784 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
785 | initial_length_size. |
786 | If the DIE refers to a DWO file, this is always of the original die, | |
787 | not the DWO file. */ | |
9c541725 | 788 | sect_offset sect_off; |
36586728 | 789 | unsigned int length; |
ae038cb0 | 790 | |
43988095 JK |
791 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
792 | short dwarf_version; | |
793 | ||
ae038cb0 DJ |
794 | /* Flag indicating this compilation unit will be read in before |
795 | any of the current compilation units are processed. */ | |
c764a876 | 796 | unsigned int queued : 1; |
ae038cb0 | 797 | |
0d99eb77 DE |
798 | /* This flag will be set when reading partial DIEs if we need to load |
799 | absolutely all DIEs for this compilation unit, instead of just the ones | |
800 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
801 | hash table and don't find it. */ |
802 | unsigned int load_all_dies : 1; | |
803 | ||
0186c6a7 DE |
804 | /* Non-zero if this CU is from .debug_types. |
805 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
806 | this is non-zero. */ | |
3019eac3 DE |
807 | unsigned int is_debug_types : 1; |
808 | ||
36586728 TT |
809 | /* Non-zero if this CU is from the .dwz file. */ |
810 | unsigned int is_dwz : 1; | |
811 | ||
a2ce51a0 DE |
812 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
813 | This flag is only valid if is_debug_types is true. | |
814 | We can't read a CU directly from a DWO file: There are required | |
815 | attributes in the stub. */ | |
816 | unsigned int reading_dwo_directly : 1; | |
817 | ||
7ee85ab1 DE |
818 | /* Non-zero if the TU has been read. |
819 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
820 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
821 | fetching them from random other DWOs (due to comdat folding). | |
822 | If the TU has already been read, the optimization is unnecessary | |
823 | (and unwise - we don't want to change where gdb thinks the TU lives | |
824 | "midflight"). | |
825 | This flag is only valid if is_debug_types is true. */ | |
826 | unsigned int tu_read : 1; | |
827 | ||
3019eac3 DE |
828 | /* The section this CU/TU lives in. |
829 | If the DIE refers to a DWO file, this is always the original die, | |
830 | not the DWO file. */ | |
8a0459fd | 831 | struct dwarf2_section_info *section; |
348e048f | 832 | |
17ea53c3 | 833 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
834 | of the CU cache it gets reset to NULL again. This is left as NULL for |
835 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 836 | struct dwarf2_cu *cu; |
1c379e20 | 837 | |
9cdd5dbd DE |
838 | /* The corresponding objfile. |
839 | Normally we can get the objfile from dwarf2_per_objfile. | |
840 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
841 | struct objfile *objfile; |
842 | ||
fffbe6a8 YQ |
843 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
844 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
845 | union |
846 | { | |
847 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 848 | or NULL for unread partial units. */ |
9291a0cd TT |
849 | struct partial_symtab *psymtab; |
850 | ||
851 | /* Data needed by the "quick" functions. */ | |
852 | struct dwarf2_per_cu_quick_data *quick; | |
853 | } v; | |
95554aad | 854 | |
796a7ff8 DE |
855 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
856 | while reading psymtabs, used to compute the psymtab dependencies, | |
857 | and then cleared. Then it is filled in again while reading full | |
858 | symbols, and only deleted when the objfile is destroyed. | |
859 | ||
860 | This is also used to work around a difference between the way gold | |
861 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
862 | is a gold bug. For symbols coming from TUs, gold records in the index | |
863 | the CU that includes the TU instead of the TU itself. This breaks | |
864 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
865 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
866 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
867 | we need to look in TU Z to find X. Fortunately, this is akin to | |
868 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
869 | .gdb_index version <=7 this also records the TUs that the CU referred | |
870 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
871 | indices so we only pay a price for gold generated indices. |
872 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 873 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
874 | }; |
875 | ||
348e048f DE |
876 | /* Entry in the signatured_types hash table. */ |
877 | ||
878 | struct signatured_type | |
879 | { | |
42e7ad6c | 880 | /* The "per_cu" object of this type. |
ac9ec31b | 881 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
882 | N.B.: This is the first member so that it's easy to convert pointers |
883 | between them. */ | |
884 | struct dwarf2_per_cu_data per_cu; | |
885 | ||
3019eac3 | 886 | /* The type's signature. */ |
348e048f DE |
887 | ULONGEST signature; |
888 | ||
3019eac3 | 889 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
890 | If this TU is a DWO stub and the definition lives in a DWO file |
891 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
892 | cu_offset type_offset_in_tu; |
893 | ||
894 | /* Offset in the section of the type's DIE. | |
895 | If the definition lives in a DWO file, this is the offset in the | |
896 | .debug_types.dwo section. | |
897 | The value is zero until the actual value is known. | |
898 | Zero is otherwise not a valid section offset. */ | |
899 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
900 | |
901 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
902 | can share them. This points to the containing symtab. */ | |
903 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
904 | |
905 | /* The type. | |
906 | The first time we encounter this type we fully read it in and install it | |
907 | in the symbol tables. Subsequent times we only need the type. */ | |
908 | struct type *type; | |
a2ce51a0 DE |
909 | |
910 | /* Containing DWO unit. | |
911 | This field is valid iff per_cu.reading_dwo_directly. */ | |
912 | struct dwo_unit *dwo_unit; | |
348e048f DE |
913 | }; |
914 | ||
0186c6a7 DE |
915 | typedef struct signatured_type *sig_type_ptr; |
916 | DEF_VEC_P (sig_type_ptr); | |
917 | ||
094b34ac DE |
918 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
919 | This includes type_unit_group and quick_file_names. */ | |
920 | ||
921 | struct stmt_list_hash | |
922 | { | |
923 | /* The DWO unit this table is from or NULL if there is none. */ | |
924 | struct dwo_unit *dwo_unit; | |
925 | ||
926 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 927 | sect_offset line_sect_off; |
094b34ac DE |
928 | }; |
929 | ||
f4dc4d17 DE |
930 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
931 | an object of this type. */ | |
932 | ||
933 | struct type_unit_group | |
934 | { | |
0186c6a7 | 935 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
936 | To simplify things we create an artificial CU that "includes" all the |
937 | type units using this stmt_list so that the rest of the code still has | |
938 | a "per_cu" handle on the symtab. | |
939 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 940 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
941 | struct dwarf2_per_cu_data per_cu; |
942 | ||
0186c6a7 DE |
943 | /* The TUs that share this DW_AT_stmt_list entry. |
944 | This is added to while parsing type units to build partial symtabs, | |
945 | and is deleted afterwards and not used again. */ | |
946 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 947 | |
43f3e411 | 948 | /* The compunit symtab. |
094b34ac | 949 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
950 | so we create an essentially anonymous symtab as the compunit symtab. */ |
951 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 952 | |
094b34ac DE |
953 | /* The data used to construct the hash key. */ |
954 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
955 | |
956 | /* The number of symtabs from the line header. | |
957 | The value here must match line_header.num_file_names. */ | |
958 | unsigned int num_symtabs; | |
959 | ||
960 | /* The symbol tables for this TU (obtained from the files listed in | |
961 | DW_AT_stmt_list). | |
962 | WARNING: The order of entries here must match the order of entries | |
963 | in the line header. After the first TU using this type_unit_group, the | |
964 | line header for the subsequent TUs is recreated from this. This is done | |
965 | because we need to use the same symtabs for each TU using the same | |
966 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
967 | there's no guarantee the line header doesn't have duplicate entries. */ | |
968 | struct symtab **symtabs; | |
969 | }; | |
970 | ||
73869dc2 | 971 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
972 | |
973 | struct dwo_sections | |
974 | { | |
975 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
976 | struct dwarf2_section_info line; |
977 | struct dwarf2_section_info loc; | |
43988095 | 978 | struct dwarf2_section_info loclists; |
09262596 DE |
979 | struct dwarf2_section_info macinfo; |
980 | struct dwarf2_section_info macro; | |
3019eac3 DE |
981 | struct dwarf2_section_info str; |
982 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
983 | /* In the case of a virtual DWO file, these two are unused. */ |
984 | struct dwarf2_section_info info; | |
3019eac3 DE |
985 | VEC (dwarf2_section_info_def) *types; |
986 | }; | |
987 | ||
c88ee1f0 | 988 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
989 | |
990 | struct dwo_unit | |
991 | { | |
992 | /* Backlink to the containing struct dwo_file. */ | |
993 | struct dwo_file *dwo_file; | |
994 | ||
995 | /* The "id" that distinguishes this CU/TU. | |
996 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
997 | Since signatures came first, we stick with it for consistency. */ | |
998 | ULONGEST signature; | |
999 | ||
1000 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 1001 | struct dwarf2_section_info *section; |
3019eac3 | 1002 | |
9c541725 PA |
1003 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
1004 | sect_offset sect_off; | |
3019eac3 DE |
1005 | unsigned int length; |
1006 | ||
1007 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
1008 | cu_offset type_offset_in_tu; | |
1009 | }; | |
1010 | ||
73869dc2 DE |
1011 | /* include/dwarf2.h defines the DWP section codes. |
1012 | It defines a max value but it doesn't define a min value, which we | |
1013 | use for error checking, so provide one. */ | |
1014 | ||
1015 | enum dwp_v2_section_ids | |
1016 | { | |
1017 | DW_SECT_MIN = 1 | |
1018 | }; | |
1019 | ||
80626a55 | 1020 | /* Data for one DWO file. |
57d63ce2 DE |
1021 | |
1022 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
1023 | appears in a DWP file). DWP files don't really have DWO files per se - | |
1024 | comdat folding of types "loses" the DWO file they came from, and from | |
1025 | a high level view DWP files appear to contain a mass of random types. | |
1026 | However, to maintain consistency with the non-DWP case we pretend DWP | |
1027 | files contain virtual DWO files, and we assign each TU with one virtual | |
1028 | DWO file (generally based on the line and abbrev section offsets - | |
1029 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
1030 | |
1031 | struct dwo_file | |
1032 | { | |
0ac5b59e | 1033 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
1034 | For virtual DWO files the name is constructed from the section offsets |
1035 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
1036 | from related CU+TUs. */ | |
0ac5b59e DE |
1037 | const char *dwo_name; |
1038 | ||
1039 | /* The DW_AT_comp_dir attribute. */ | |
1040 | const char *comp_dir; | |
3019eac3 | 1041 | |
80626a55 DE |
1042 | /* The bfd, when the file is open. Otherwise this is NULL. |
1043 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
1044 | bfd *dbfd; | |
3019eac3 | 1045 | |
73869dc2 DE |
1046 | /* The sections that make up this DWO file. |
1047 | Remember that for virtual DWO files in DWP V2, these are virtual | |
1048 | sections (for lack of a better name). */ | |
3019eac3 DE |
1049 | struct dwo_sections sections; |
1050 | ||
33c5cd75 DB |
1051 | /* The CUs in the file. |
1052 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
1053 | an extension to handle LLVM's Link Time Optimization output (where | |
1054 | multiple source files may be compiled into a single object/dwo pair). */ | |
1055 | htab_t cus; | |
3019eac3 DE |
1056 | |
1057 | /* Table of TUs in the file. | |
1058 | Each element is a struct dwo_unit. */ | |
1059 | htab_t tus; | |
1060 | }; | |
1061 | ||
80626a55 DE |
1062 | /* These sections are what may appear in a DWP file. */ |
1063 | ||
1064 | struct dwp_sections | |
1065 | { | |
73869dc2 | 1066 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
1067 | struct dwarf2_section_info str; |
1068 | struct dwarf2_section_info cu_index; | |
1069 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
1070 | |
1071 | /* These are only used by DWP version 2 files. | |
1072 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
1073 | sections are referenced by section number, and are not recorded here. | |
1074 | In DWP version 2 there is at most one copy of all these sections, each | |
1075 | section being (effectively) comprised of the concatenation of all of the | |
1076 | individual sections that exist in the version 1 format. | |
1077 | To keep the code simple we treat each of these concatenated pieces as a | |
1078 | section itself (a virtual section?). */ | |
1079 | struct dwarf2_section_info abbrev; | |
1080 | struct dwarf2_section_info info; | |
1081 | struct dwarf2_section_info line; | |
1082 | struct dwarf2_section_info loc; | |
1083 | struct dwarf2_section_info macinfo; | |
1084 | struct dwarf2_section_info macro; | |
1085 | struct dwarf2_section_info str_offsets; | |
1086 | struct dwarf2_section_info types; | |
80626a55 DE |
1087 | }; |
1088 | ||
73869dc2 DE |
1089 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
1090 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 1091 | |
73869dc2 | 1092 | struct virtual_v1_dwo_sections |
80626a55 DE |
1093 | { |
1094 | struct dwarf2_section_info abbrev; | |
1095 | struct dwarf2_section_info line; | |
1096 | struct dwarf2_section_info loc; | |
1097 | struct dwarf2_section_info macinfo; | |
1098 | struct dwarf2_section_info macro; | |
1099 | struct dwarf2_section_info str_offsets; | |
1100 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 1101 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
1102 | struct dwarf2_section_info info_or_types; |
1103 | }; | |
1104 | ||
73869dc2 DE |
1105 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
1106 | In version 2, the sections of the DWO files are concatenated together | |
1107 | and stored in one section of that name. Thus each ELF section contains | |
1108 | several "virtual" sections. */ | |
1109 | ||
1110 | struct virtual_v2_dwo_sections | |
1111 | { | |
1112 | bfd_size_type abbrev_offset; | |
1113 | bfd_size_type abbrev_size; | |
1114 | ||
1115 | bfd_size_type line_offset; | |
1116 | bfd_size_type line_size; | |
1117 | ||
1118 | bfd_size_type loc_offset; | |
1119 | bfd_size_type loc_size; | |
1120 | ||
1121 | bfd_size_type macinfo_offset; | |
1122 | bfd_size_type macinfo_size; | |
1123 | ||
1124 | bfd_size_type macro_offset; | |
1125 | bfd_size_type macro_size; | |
1126 | ||
1127 | bfd_size_type str_offsets_offset; | |
1128 | bfd_size_type str_offsets_size; | |
1129 | ||
1130 | /* Each DWP hash table entry records one CU or one TU. | |
1131 | That is recorded here, and copied to dwo_unit.section. */ | |
1132 | bfd_size_type info_or_types_offset; | |
1133 | bfd_size_type info_or_types_size; | |
1134 | }; | |
1135 | ||
80626a55 DE |
1136 | /* Contents of DWP hash tables. */ |
1137 | ||
1138 | struct dwp_hash_table | |
1139 | { | |
73869dc2 | 1140 | uint32_t version, nr_columns; |
80626a55 | 1141 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
1142 | const gdb_byte *hash_table, *unit_table; |
1143 | union | |
1144 | { | |
1145 | struct | |
1146 | { | |
1147 | const gdb_byte *indices; | |
1148 | } v1; | |
1149 | struct | |
1150 | { | |
1151 | /* This is indexed by column number and gives the id of the section | |
1152 | in that column. */ | |
1153 | #define MAX_NR_V2_DWO_SECTIONS \ | |
1154 | (1 /* .debug_info or .debug_types */ \ | |
1155 | + 1 /* .debug_abbrev */ \ | |
1156 | + 1 /* .debug_line */ \ | |
1157 | + 1 /* .debug_loc */ \ | |
1158 | + 1 /* .debug_str_offsets */ \ | |
1159 | + 1 /* .debug_macro or .debug_macinfo */) | |
1160 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
1161 | const gdb_byte *offsets; | |
1162 | const gdb_byte *sizes; | |
1163 | } v2; | |
1164 | } section_pool; | |
80626a55 DE |
1165 | }; |
1166 | ||
1167 | /* Data for one DWP file. */ | |
1168 | ||
1169 | struct dwp_file | |
1170 | { | |
1171 | /* Name of the file. */ | |
1172 | const char *name; | |
1173 | ||
73869dc2 DE |
1174 | /* File format version. */ |
1175 | int version; | |
1176 | ||
93417882 | 1177 | /* The bfd. */ |
80626a55 DE |
1178 | bfd *dbfd; |
1179 | ||
1180 | /* Section info for this file. */ | |
1181 | struct dwp_sections sections; | |
1182 | ||
57d63ce2 | 1183 | /* Table of CUs in the file. */ |
80626a55 DE |
1184 | const struct dwp_hash_table *cus; |
1185 | ||
1186 | /* Table of TUs in the file. */ | |
1187 | const struct dwp_hash_table *tus; | |
1188 | ||
19ac8c2e DE |
1189 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1190 | htab_t loaded_cus; | |
1191 | htab_t loaded_tus; | |
80626a55 | 1192 | |
73869dc2 DE |
1193 | /* Table to map ELF section numbers to their sections. |
1194 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1195 | unsigned int num_sections; |
1196 | asection **elf_sections; | |
1197 | }; | |
1198 | ||
36586728 TT |
1199 | /* This represents a '.dwz' file. */ |
1200 | ||
1201 | struct dwz_file | |
1202 | { | |
1203 | /* A dwz file can only contain a few sections. */ | |
1204 | struct dwarf2_section_info abbrev; | |
1205 | struct dwarf2_section_info info; | |
1206 | struct dwarf2_section_info str; | |
1207 | struct dwarf2_section_info line; | |
1208 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1209 | struct dwarf2_section_info gdb_index; |
927aa2e7 | 1210 | struct dwarf2_section_info debug_names; |
36586728 TT |
1211 | |
1212 | /* The dwz's BFD. */ | |
1213 | bfd *dwz_bfd; | |
1214 | }; | |
1215 | ||
0963b4bd MS |
1216 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1217 | al. which are used for both .debug_info and .debug_types dies. | |
1218 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1219 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1220 | |
1221 | struct die_reader_specs | |
1222 | { | |
a32a8923 | 1223 | /* The bfd of die_section. */ |
93311388 DE |
1224 | bfd* abfd; |
1225 | ||
1226 | /* The CU of the DIE we are parsing. */ | |
1227 | struct dwarf2_cu *cu; | |
1228 | ||
80626a55 | 1229 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1230 | struct dwo_file *dwo_file; |
1231 | ||
dee91e82 | 1232 | /* The section the die comes from. |
3019eac3 | 1233 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1234 | struct dwarf2_section_info *die_section; |
1235 | ||
1236 | /* die_section->buffer. */ | |
d521ce57 | 1237 | const gdb_byte *buffer; |
f664829e DE |
1238 | |
1239 | /* The end of the buffer. */ | |
1240 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1241 | |
1242 | /* The value of the DW_AT_comp_dir attribute. */ | |
1243 | const char *comp_dir; | |
93311388 DE |
1244 | }; |
1245 | ||
fd820528 | 1246 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1247 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1248 | const gdb_byte *info_ptr, |
dee91e82 DE |
1249 | struct die_info *comp_unit_die, |
1250 | int has_children, | |
1251 | void *data); | |
1252 | ||
ecfb656c PA |
1253 | /* A 1-based directory index. This is a strong typedef to prevent |
1254 | accidentally using a directory index as a 0-based index into an | |
1255 | array/vector. */ | |
1256 | enum class dir_index : unsigned int {}; | |
1257 | ||
1258 | /* Likewise, a 1-based file name index. */ | |
1259 | enum class file_name_index : unsigned int {}; | |
1260 | ||
52059ffd TT |
1261 | struct file_entry |
1262 | { | |
fff8551c PA |
1263 | file_entry () = default; |
1264 | ||
ecfb656c | 1265 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1266 | unsigned int mod_time_, unsigned int length_) |
1267 | : name (name_), | |
ecfb656c | 1268 | d_index (d_index_), |
fff8551c PA |
1269 | mod_time (mod_time_), |
1270 | length (length_) | |
1271 | {} | |
1272 | ||
ecfb656c PA |
1273 | /* Return the include directory at D_INDEX stored in LH. Returns |
1274 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1275 | const char *include_dir (const line_header *lh) const; |
1276 | ||
fff8551c PA |
1277 | /* The file name. Note this is an observing pointer. The memory is |
1278 | owned by debug_line_buffer. */ | |
1279 | const char *name {}; | |
1280 | ||
8c43009f | 1281 | /* The directory index (1-based). */ |
ecfb656c | 1282 | dir_index d_index {}; |
fff8551c PA |
1283 | |
1284 | unsigned int mod_time {}; | |
1285 | ||
1286 | unsigned int length {}; | |
1287 | ||
1288 | /* True if referenced by the Line Number Program. */ | |
1289 | bool included_p {}; | |
1290 | ||
83769d0b | 1291 | /* The associated symbol table, if any. */ |
fff8551c | 1292 | struct symtab *symtab {}; |
52059ffd TT |
1293 | }; |
1294 | ||
debd256d JB |
1295 | /* The line number information for a compilation unit (found in the |
1296 | .debug_line section) begins with a "statement program header", | |
1297 | which contains the following information. */ | |
1298 | struct line_header | |
1299 | { | |
fff8551c PA |
1300 | line_header () |
1301 | : offset_in_dwz {} | |
1302 | {} | |
1303 | ||
1304 | /* Add an entry to the include directory table. */ | |
1305 | void add_include_dir (const char *include_dir); | |
1306 | ||
1307 | /* Add an entry to the file name table. */ | |
ecfb656c | 1308 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1309 | unsigned int mod_time, unsigned int length); |
1310 | ||
ecfb656c | 1311 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1312 | is out of bounds. */ |
ecfb656c | 1313 | const char *include_dir_at (dir_index index) const |
8c43009f | 1314 | { |
ecfb656c PA |
1315 | /* Convert directory index number (1-based) to vector index |
1316 | (0-based). */ | |
1317 | size_t vec_index = to_underlying (index) - 1; | |
1318 | ||
1319 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1320 | return NULL; |
ecfb656c | 1321 | return include_dirs[vec_index]; |
8c43009f PA |
1322 | } |
1323 | ||
ecfb656c | 1324 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1325 | is out of bounds. */ |
ecfb656c | 1326 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1327 | { |
ecfb656c PA |
1328 | /* Convert file name index number (1-based) to vector index |
1329 | (0-based). */ | |
1330 | size_t vec_index = to_underlying (index) - 1; | |
1331 | ||
1332 | if (vec_index >= file_names.size ()) | |
fff8551c | 1333 | return NULL; |
ecfb656c | 1334 | return &file_names[vec_index]; |
fff8551c PA |
1335 | } |
1336 | ||
1337 | /* Const version of the above. */ | |
1338 | const file_entry *file_name_at (unsigned int index) const | |
1339 | { | |
1340 | if (index >= file_names.size ()) | |
8c43009f PA |
1341 | return NULL; |
1342 | return &file_names[index]; | |
1343 | } | |
1344 | ||
527f3840 | 1345 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1346 | sect_offset sect_off {}; |
527f3840 JK |
1347 | |
1348 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1349 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1350 | ||
1351 | unsigned int total_length {}; | |
1352 | unsigned short version {}; | |
1353 | unsigned int header_length {}; | |
1354 | unsigned char minimum_instruction_length {}; | |
1355 | unsigned char maximum_ops_per_instruction {}; | |
1356 | unsigned char default_is_stmt {}; | |
1357 | int line_base {}; | |
1358 | unsigned char line_range {}; | |
1359 | unsigned char opcode_base {}; | |
debd256d JB |
1360 | |
1361 | /* standard_opcode_lengths[i] is the number of operands for the | |
1362 | standard opcode whose value is i. This means that | |
1363 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1364 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1365 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1366 | |
fff8551c PA |
1367 | /* The include_directories table. Note these are observing |
1368 | pointers. The memory is owned by debug_line_buffer. */ | |
1369 | std::vector<const char *> include_dirs; | |
debd256d | 1370 | |
fff8551c PA |
1371 | /* The file_names table. */ |
1372 | std::vector<file_entry> file_names; | |
debd256d JB |
1373 | |
1374 | /* The start and end of the statement program following this | |
6502dd73 | 1375 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1376 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1377 | }; |
c906108c | 1378 | |
fff8551c PA |
1379 | typedef std::unique_ptr<line_header> line_header_up; |
1380 | ||
8c43009f PA |
1381 | const char * |
1382 | file_entry::include_dir (const line_header *lh) const | |
1383 | { | |
ecfb656c | 1384 | return lh->include_dir_at (d_index); |
8c43009f PA |
1385 | } |
1386 | ||
c906108c | 1387 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1388 | need this much information. */ |
c906108c SS |
1389 | struct partial_die_info |
1390 | { | |
72bf9492 | 1391 | /* Offset of this DIE. */ |
9c541725 | 1392 | sect_offset sect_off; |
72bf9492 DJ |
1393 | |
1394 | /* DWARF-2 tag for this DIE. */ | |
1395 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1396 | ||
72bf9492 DJ |
1397 | /* Assorted flags describing the data found in this DIE. */ |
1398 | unsigned int has_children : 1; | |
1399 | unsigned int is_external : 1; | |
1400 | unsigned int is_declaration : 1; | |
1401 | unsigned int has_type : 1; | |
1402 | unsigned int has_specification : 1; | |
1403 | unsigned int has_pc_info : 1; | |
481860b3 | 1404 | unsigned int may_be_inlined : 1; |
72bf9492 | 1405 | |
0c1b455e TT |
1406 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1407 | unsigned int main_subprogram : 1; | |
1408 | ||
72bf9492 DJ |
1409 | /* Flag set if the SCOPE field of this structure has been |
1410 | computed. */ | |
1411 | unsigned int scope_set : 1; | |
1412 | ||
fa4028e9 JB |
1413 | /* Flag set if the DIE has a byte_size attribute. */ |
1414 | unsigned int has_byte_size : 1; | |
1415 | ||
ff908ebf AW |
1416 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1417 | unsigned int has_const_value : 1; | |
1418 | ||
98bfdba5 PA |
1419 | /* Flag set if any of the DIE's children are template arguments. */ |
1420 | unsigned int has_template_arguments : 1; | |
1421 | ||
abc72ce4 DE |
1422 | /* Flag set if fixup_partial_die has been called on this die. */ |
1423 | unsigned int fixup_called : 1; | |
1424 | ||
36586728 TT |
1425 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1426 | unsigned int is_dwz : 1; | |
1427 | ||
1428 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1429 | unsigned int spec_is_dwz : 1; | |
1430 | ||
72bf9492 | 1431 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1432 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1433 | const char *name; |
72bf9492 | 1434 | |
abc72ce4 DE |
1435 | /* The linkage name, if present. */ |
1436 | const char *linkage_name; | |
1437 | ||
72bf9492 DJ |
1438 | /* The scope to prepend to our children. This is generally |
1439 | allocated on the comp_unit_obstack, so will disappear | |
1440 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1441 | const char *scope; |
72bf9492 | 1442 | |
95554aad TT |
1443 | /* Some data associated with the partial DIE. The tag determines |
1444 | which field is live. */ | |
1445 | union | |
1446 | { | |
1447 | /* The location description associated with this DIE, if any. */ | |
1448 | struct dwarf_block *locdesc; | |
1449 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1450 | sect_offset sect_off; |
95554aad | 1451 | } d; |
72bf9492 DJ |
1452 | |
1453 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1454 | CORE_ADDR lowpc; |
1455 | CORE_ADDR highpc; | |
72bf9492 | 1456 | |
93311388 | 1457 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1458 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1459 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1460 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1461 | const gdb_byte *sibling; |
72bf9492 DJ |
1462 | |
1463 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1464 | DW_AT_specification (or DW_AT_abstract_origin or | |
1465 | DW_AT_extension). */ | |
b64f50a1 | 1466 | sect_offset spec_offset; |
72bf9492 DJ |
1467 | |
1468 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1469 | if any. */ | |
1470 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1471 | }; |
1472 | ||
0963b4bd | 1473 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1474 | struct abbrev_info |
1475 | { | |
1476 | unsigned int number; /* number identifying abbrev */ | |
1477 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1478 | unsigned short has_children; /* boolean */ |
1479 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1480 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1481 | struct abbrev_info *next; /* next in chain */ | |
1482 | }; | |
1483 | ||
1484 | struct attr_abbrev | |
1485 | { | |
9d25dd43 DE |
1486 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1487 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1488 | |
1489 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1490 | LONGEST implicit_const; | |
c906108c SS |
1491 | }; |
1492 | ||
433df2d4 DE |
1493 | /* Size of abbrev_table.abbrev_hash_table. */ |
1494 | #define ABBREV_HASH_SIZE 121 | |
1495 | ||
1496 | /* Top level data structure to contain an abbreviation table. */ | |
1497 | ||
1498 | struct abbrev_table | |
1499 | { | |
f4dc4d17 DE |
1500 | /* Where the abbrev table came from. |
1501 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1502 | sect_offset sect_off; |
433df2d4 DE |
1503 | |
1504 | /* Storage for the abbrev table. */ | |
1505 | struct obstack abbrev_obstack; | |
1506 | ||
1507 | /* Hash table of abbrevs. | |
1508 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1509 | It could be statically allocated, but the previous code didn't so we | |
1510 | don't either. */ | |
1511 | struct abbrev_info **abbrevs; | |
1512 | }; | |
1513 | ||
0963b4bd | 1514 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1515 | struct attribute |
1516 | { | |
9d25dd43 | 1517 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1518 | ENUM_BITFIELD(dwarf_form) form : 15; |
1519 | ||
1520 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1521 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1522 | here for better struct attribute alignment. */ | |
1523 | unsigned int string_is_canonical : 1; | |
1524 | ||
b60c80d6 DJ |
1525 | union |
1526 | { | |
15d034d0 | 1527 | const char *str; |
b60c80d6 | 1528 | struct dwarf_block *blk; |
43bbcdc2 PH |
1529 | ULONGEST unsnd; |
1530 | LONGEST snd; | |
b60c80d6 | 1531 | CORE_ADDR addr; |
ac9ec31b | 1532 | ULONGEST signature; |
b60c80d6 DJ |
1533 | } |
1534 | u; | |
1535 | }; | |
1536 | ||
0963b4bd | 1537 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1538 | struct die_info |
1539 | { | |
76815b17 DE |
1540 | /* DWARF-2 tag for this DIE. */ |
1541 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1542 | ||
1543 | /* Number of attributes */ | |
98bfdba5 PA |
1544 | unsigned char num_attrs; |
1545 | ||
1546 | /* True if we're presently building the full type name for the | |
1547 | type derived from this DIE. */ | |
1548 | unsigned char building_fullname : 1; | |
76815b17 | 1549 | |
adde2bff DE |
1550 | /* True if this die is in process. PR 16581. */ |
1551 | unsigned char in_process : 1; | |
1552 | ||
76815b17 DE |
1553 | /* Abbrev number */ |
1554 | unsigned int abbrev; | |
1555 | ||
93311388 | 1556 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1557 | sect_offset sect_off; |
78ba4af6 JB |
1558 | |
1559 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1560 | points to this die's parent; CHILD points to the first child of | |
1561 | this node; and all the children of a given node are chained | |
4950bc1c | 1562 | together via their SIBLING fields. */ |
639d11d3 DC |
1563 | struct die_info *child; /* Its first child, if any. */ |
1564 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1565 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1566 | |
b60c80d6 DJ |
1567 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1568 | zero, but it's not common and zero-sized arrays are not | |
1569 | sufficiently portable C. */ | |
1570 | struct attribute attrs[1]; | |
c906108c SS |
1571 | }; |
1572 | ||
0963b4bd | 1573 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1574 | |
1575 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1576 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1577 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1578 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1579 | #define DW_SND(attr) ((attr)->u.snd) | |
1580 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1581 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1582 | |
0963b4bd | 1583 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1584 | struct dwarf_block |
1585 | { | |
56eb65bd | 1586 | size_t size; |
1d6edc3c JK |
1587 | |
1588 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1589 | const gdb_byte *data; |
c906108c SS |
1590 | }; |
1591 | ||
c906108c SS |
1592 | #ifndef ATTR_ALLOC_CHUNK |
1593 | #define ATTR_ALLOC_CHUNK 4 | |
1594 | #endif | |
1595 | ||
c906108c SS |
1596 | /* Allocate fields for structs, unions and enums in this size. */ |
1597 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1598 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1599 | #endif | |
1600 | ||
c906108c SS |
1601 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1602 | but this would require a corresponding change in unpack_field_as_long | |
1603 | and friends. */ | |
1604 | static int bits_per_byte = 8; | |
1605 | ||
52059ffd TT |
1606 | struct nextfield |
1607 | { | |
1608 | struct nextfield *next; | |
1609 | int accessibility; | |
1610 | int virtuality; | |
1611 | struct field field; | |
1612 | }; | |
1613 | ||
1614 | struct nextfnfield | |
1615 | { | |
1616 | struct nextfnfield *next; | |
1617 | struct fn_field fnfield; | |
1618 | }; | |
1619 | ||
1620 | struct fnfieldlist | |
1621 | { | |
1622 | const char *name; | |
1623 | int length; | |
1624 | struct nextfnfield *head; | |
1625 | }; | |
1626 | ||
883fd55a | 1627 | struct decl_field_list |
52059ffd | 1628 | { |
883fd55a KS |
1629 | struct decl_field field; |
1630 | struct decl_field_list *next; | |
52059ffd TT |
1631 | }; |
1632 | ||
c906108c SS |
1633 | /* The routines that read and process dies for a C struct or C++ class |
1634 | pass lists of data member fields and lists of member function fields | |
1635 | in an instance of a field_info structure, as defined below. */ | |
1636 | struct field_info | |
c5aa993b | 1637 | { |
0963b4bd | 1638 | /* List of data member and baseclasses fields. */ |
52059ffd | 1639 | struct nextfield *fields, *baseclasses; |
c906108c | 1640 | |
7d0ccb61 | 1641 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1642 | int nfields; |
c906108c | 1643 | |
c5aa993b JM |
1644 | /* Number of baseclasses. */ |
1645 | int nbaseclasses; | |
c906108c | 1646 | |
c5aa993b JM |
1647 | /* Set if the accesibility of one of the fields is not public. */ |
1648 | int non_public_fields; | |
c906108c | 1649 | |
c5aa993b JM |
1650 | /* Member function fieldlist array, contains name of possibly overloaded |
1651 | member function, number of overloaded member functions and a pointer | |
1652 | to the head of the member function field chain. */ | |
52059ffd | 1653 | struct fnfieldlist *fnfieldlists; |
c906108c | 1654 | |
c5aa993b JM |
1655 | /* Number of entries in the fnfieldlists array. */ |
1656 | int nfnfields; | |
98751a41 JK |
1657 | |
1658 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1659 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
883fd55a | 1660 | struct decl_field_list *typedef_field_list; |
98751a41 | 1661 | unsigned typedef_field_list_count; |
883fd55a KS |
1662 | |
1663 | /* Nested types defined by this class and the number of elements in this | |
1664 | list. */ | |
1665 | struct decl_field_list *nested_types_list; | |
1666 | unsigned nested_types_list_count; | |
c5aa993b | 1667 | }; |
c906108c | 1668 | |
10b3939b DJ |
1669 | /* One item on the queue of compilation units to read in full symbols |
1670 | for. */ | |
1671 | struct dwarf2_queue_item | |
1672 | { | |
1673 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1674 | enum language pretend_language; |
10b3939b DJ |
1675 | struct dwarf2_queue_item *next; |
1676 | }; | |
1677 | ||
1678 | /* The current queue. */ | |
1679 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1680 | ||
ae038cb0 DJ |
1681 | /* Loaded secondary compilation units are kept in memory until they |
1682 | have not been referenced for the processing of this many | |
1683 | compilation units. Set this to zero to disable caching. Cache | |
1684 | sizes of up to at least twenty will improve startup time for | |
1685 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1686 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1687 | static void |
b4f54984 DE |
1688 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1689 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1690 | { |
3e43a32a | 1691 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1692 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1693 | value); |
1694 | } | |
4390d890 | 1695 | \f |
c906108c SS |
1696 | /* local function prototypes */ |
1697 | ||
a32a8923 DE |
1698 | static const char *get_section_name (const struct dwarf2_section_info *); |
1699 | ||
1700 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1701 | ||
918dd910 JK |
1702 | static void dwarf2_find_base_address (struct die_info *die, |
1703 | struct dwarf2_cu *cu); | |
1704 | ||
0018ea6f DE |
1705 | static struct partial_symtab *create_partial_symtab |
1706 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1707 | ||
f1902523 JK |
1708 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1709 | const gdb_byte *info_ptr, | |
1710 | struct die_info *type_unit_die, | |
1711 | int has_children, void *data); | |
1712 | ||
c67a9c90 | 1713 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1714 | |
72bf9492 DJ |
1715 | static void scan_partial_symbols (struct partial_die_info *, |
1716 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1717 | int, struct dwarf2_cu *); |
c906108c | 1718 | |
72bf9492 DJ |
1719 | static void add_partial_symbol (struct partial_die_info *, |
1720 | struct dwarf2_cu *); | |
63d06c5c | 1721 | |
72bf9492 DJ |
1722 | static void add_partial_namespace (struct partial_die_info *pdi, |
1723 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1724 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1725 | |
5d7cb8df | 1726 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1727 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1728 | struct dwarf2_cu *cu); |
1729 | ||
72bf9492 DJ |
1730 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1731 | struct dwarf2_cu *cu); | |
91c24f0a | 1732 | |
bc30ff58 JB |
1733 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1734 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1735 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1736 | |
257e7a09 YQ |
1737 | static void dwarf2_read_symtab (struct partial_symtab *, |
1738 | struct objfile *); | |
c906108c | 1739 | |
a14ed312 | 1740 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1741 | |
433df2d4 DE |
1742 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1743 | (const struct abbrev_table *, unsigned int); | |
1744 | ||
1745 | static struct abbrev_table *abbrev_table_read_table | |
1746 | (struct dwarf2_section_info *, sect_offset); | |
1747 | ||
1748 | static void abbrev_table_free (struct abbrev_table *); | |
1749 | ||
f4dc4d17 DE |
1750 | static void abbrev_table_free_cleanup (void *); |
1751 | ||
dee91e82 DE |
1752 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1753 | struct dwarf2_section_info *); | |
c906108c | 1754 | |
f3dd6933 | 1755 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1756 | |
d521ce57 | 1757 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1758 | |
dee91e82 | 1759 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1760 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1761 | |
d521ce57 TT |
1762 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1763 | struct partial_die_info *, | |
1764 | struct abbrev_info *, | |
1765 | unsigned int, | |
1766 | const gdb_byte *); | |
c906108c | 1767 | |
36586728 | 1768 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1769 | struct dwarf2_cu *); |
72bf9492 DJ |
1770 | |
1771 | static void fixup_partial_die (struct partial_die_info *, | |
1772 | struct dwarf2_cu *); | |
1773 | ||
d521ce57 TT |
1774 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1775 | struct attribute *, struct attr_abbrev *, | |
1776 | const gdb_byte *); | |
a8329558 | 1777 | |
a1855c1d | 1778 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1779 | |
a1855c1d | 1780 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1781 | |
a1855c1d | 1782 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1783 | |
a1855c1d | 1784 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1785 | |
a1855c1d | 1786 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1787 | |
d521ce57 | 1788 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1789 | unsigned int *); |
c906108c | 1790 | |
d521ce57 | 1791 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1792 | |
1793 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1794 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1795 | unsigned int *, unsigned int *); |
613e1657 | 1796 | |
d521ce57 TT |
1797 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1798 | const struct comp_unit_head *, | |
c764a876 DE |
1799 | unsigned int *); |
1800 | ||
d521ce57 | 1801 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1802 | |
f4dc4d17 DE |
1803 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1804 | sect_offset); | |
1805 | ||
d521ce57 | 1806 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1807 | |
d521ce57 | 1808 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1809 | |
d521ce57 TT |
1810 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1811 | const struct comp_unit_head *, | |
1812 | unsigned int *); | |
4bdf3d34 | 1813 | |
43988095 JK |
1814 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1815 | const struct comp_unit_head *, | |
1816 | unsigned int *); | |
36586728 | 1817 | |
927aa2e7 JK |
1818 | static const char *read_indirect_string_at_offset (bfd *abfd, |
1819 | LONGEST str_offset); | |
1820 | ||
43988095 | 1821 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1822 | |
d521ce57 | 1823 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1824 | |
d521ce57 TT |
1825 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1826 | const gdb_byte *, | |
3019eac3 DE |
1827 | unsigned int *); |
1828 | ||
d521ce57 | 1829 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1830 | ULONGEST str_index); |
3019eac3 | 1831 | |
e142c38c | 1832 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1833 | |
e142c38c DJ |
1834 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1835 | struct dwarf2_cu *); | |
c906108c | 1836 | |
348e048f | 1837 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1838 | unsigned int); |
348e048f | 1839 | |
7d45c7c3 KB |
1840 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1841 | struct dwarf2_cu *cu); | |
1842 | ||
05cf31d1 JB |
1843 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1844 | struct dwarf2_cu *cu); | |
1845 | ||
e142c38c | 1846 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1847 | |
e142c38c | 1848 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1849 | struct dwarf2_cu **); |
63d06c5c | 1850 | |
9c541725 | 1851 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1852 | struct dwarf2_cu *cu); |
debd256d | 1853 | |
f3f5162e | 1854 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1855 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1856 | CORE_ADDR, int decode_mapping); |
c906108c | 1857 | |
4d663531 | 1858 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1859 | |
43f3e411 DE |
1860 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1861 | const char *, const char *, | |
1862 | CORE_ADDR); | |
f4dc4d17 | 1863 | |
a14ed312 | 1864 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1865 | struct dwarf2_cu *); |
c906108c | 1866 | |
34eaf542 TT |
1867 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1868 | struct dwarf2_cu *, struct symbol *); | |
1869 | ||
ff39bb5e | 1870 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1871 | struct dwarf2_cu *); |
c906108c | 1872 | |
ff39bb5e | 1873 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1874 | struct type *type, |
1875 | const char *name, | |
1876 | struct obstack *obstack, | |
12df843f | 1877 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1878 | const gdb_byte **bytes, |
98bfdba5 | 1879 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1880 | |
e7c27a73 | 1881 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1882 | |
b4ba55a1 JB |
1883 | static int need_gnat_info (struct dwarf2_cu *); |
1884 | ||
3e43a32a MS |
1885 | static struct type *die_descriptive_type (struct die_info *, |
1886 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1887 | |
1888 | static void set_descriptive_type (struct type *, struct die_info *, | |
1889 | struct dwarf2_cu *); | |
1890 | ||
e7c27a73 DJ |
1891 | static struct type *die_containing_type (struct die_info *, |
1892 | struct dwarf2_cu *); | |
c906108c | 1893 | |
ff39bb5e | 1894 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1895 | struct dwarf2_cu *); |
c906108c | 1896 | |
f792889a | 1897 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1898 | |
673bfd45 DE |
1899 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1900 | ||
0d5cff50 | 1901 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1902 | |
6e70227d | 1903 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1904 | const char *suffix, int physname, |
1905 | struct dwarf2_cu *cu); | |
63d06c5c | 1906 | |
e7c27a73 | 1907 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1908 | |
348e048f DE |
1909 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1910 | ||
e7c27a73 | 1911 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1912 | |
e7c27a73 | 1913 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1914 | |
96408a79 SA |
1915 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1916 | ||
71a3c369 TT |
1917 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1918 | ||
ff013f42 JK |
1919 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1920 | struct dwarf2_cu *, struct partial_symtab *); | |
1921 | ||
3a2b436a | 1922 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1923 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1924 | enum pc_bounds_kind |
1925 | { | |
e385593e | 1926 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1927 | PC_BOUNDS_NOT_PRESENT, |
1928 | ||
e385593e JK |
1929 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1930 | were present but they do not form a valid range of PC addresses. */ | |
1931 | PC_BOUNDS_INVALID, | |
1932 | ||
3a2b436a JK |
1933 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1934 | PC_BOUNDS_RANGES, | |
1935 | ||
1936 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1937 | PC_BOUNDS_HIGH_LOW, | |
1938 | }; | |
1939 | ||
1940 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1941 | CORE_ADDR *, CORE_ADDR *, | |
1942 | struct dwarf2_cu *, | |
1943 | struct partial_symtab *); | |
c906108c | 1944 | |
fae299cd DC |
1945 | static void get_scope_pc_bounds (struct die_info *, |
1946 | CORE_ADDR *, CORE_ADDR *, | |
1947 | struct dwarf2_cu *); | |
1948 | ||
801e3a5b JB |
1949 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1950 | CORE_ADDR, struct dwarf2_cu *); | |
1951 | ||
a14ed312 | 1952 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1953 | struct dwarf2_cu *); |
c906108c | 1954 | |
a14ed312 | 1955 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1956 | struct type *, struct dwarf2_cu *); |
c906108c | 1957 | |
a14ed312 | 1958 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1959 | struct die_info *, struct type *, |
e7c27a73 | 1960 | struct dwarf2_cu *); |
c906108c | 1961 | |
a14ed312 | 1962 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1963 | struct type *, |
1964 | struct dwarf2_cu *); | |
c906108c | 1965 | |
134d01f1 | 1966 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1967 | |
e7c27a73 | 1968 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1969 | |
e7c27a73 | 1970 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1971 | |
5d7cb8df JK |
1972 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1973 | ||
22cee43f PMR |
1974 | static struct using_direct **using_directives (enum language); |
1975 | ||
27aa8d6a SW |
1976 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1977 | ||
74921315 KS |
1978 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1979 | ||
f55ee35c JK |
1980 | static struct type *read_module_type (struct die_info *die, |
1981 | struct dwarf2_cu *cu); | |
1982 | ||
38d518c9 | 1983 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1984 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1985 | |
134d01f1 | 1986 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1987 | |
e7c27a73 | 1988 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1989 | |
6e70227d | 1990 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1991 | struct dwarf2_cu *); |
1992 | ||
bf6af496 | 1993 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1994 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1995 | struct die_info *); |
639d11d3 | 1996 | |
dee91e82 | 1997 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1998 | const gdb_byte *info_ptr, |
1999 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
2000 | struct die_info *parent); |
2001 | ||
d521ce57 TT |
2002 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
2003 | struct die_info **, const gdb_byte *, | |
2004 | int *, int); | |
3019eac3 | 2005 | |
d521ce57 TT |
2006 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
2007 | struct die_info **, const gdb_byte *, | |
2008 | int *); | |
93311388 | 2009 | |
e7c27a73 | 2010 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 2011 | |
15d034d0 TT |
2012 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
2013 | struct obstack *); | |
71c25dea | 2014 | |
15d034d0 | 2015 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 2016 | |
15d034d0 | 2017 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
2018 | struct die_info *die, |
2019 | struct dwarf2_cu *cu); | |
2020 | ||
ca69b9e6 DE |
2021 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
2022 | struct dwarf2_cu *cu); | |
2023 | ||
e142c38c | 2024 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 2025 | struct dwarf2_cu **); |
9219021c | 2026 | |
f39c6ffd | 2027 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 2028 | |
f39c6ffd | 2029 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 2030 | |
f39c6ffd | 2031 | static const char *dwarf_form_name (unsigned int); |
c906108c | 2032 | |
a121b7c1 | 2033 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 2034 | |
f39c6ffd | 2035 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 2036 | |
f9aca02d | 2037 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 2038 | |
d97bc12b DE |
2039 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
2040 | ||
2041 | static void dump_die_for_error (struct die_info *); | |
2042 | ||
2043 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
2044 | struct die_info *); | |
c906108c | 2045 | |
d97bc12b | 2046 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 2047 | |
51545339 | 2048 | static void store_in_ref_table (struct die_info *, |
10b3939b | 2049 | struct dwarf2_cu *); |
c906108c | 2050 | |
ff39bb5e | 2051 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 2052 | |
ff39bb5e | 2053 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 2054 | |
348e048f | 2055 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 2056 | const struct attribute *, |
348e048f DE |
2057 | struct dwarf2_cu **); |
2058 | ||
10b3939b | 2059 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 2060 | const struct attribute *, |
f2f0e013 | 2061 | struct dwarf2_cu **); |
c906108c | 2062 | |
348e048f | 2063 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 2064 | const struct attribute *, |
348e048f DE |
2065 | struct dwarf2_cu **); |
2066 | ||
ac9ec31b DE |
2067 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
2068 | struct dwarf2_cu *); | |
2069 | ||
2070 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 2071 | const struct attribute *, |
ac9ec31b DE |
2072 | struct dwarf2_cu *); |
2073 | ||
e5fe5e75 | 2074 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 2075 | |
52dc124a | 2076 | static void read_signatured_type (struct signatured_type *); |
348e048f | 2077 | |
63e43d3a PMR |
2078 | static int attr_to_dynamic_prop (const struct attribute *attr, |
2079 | struct die_info *die, struct dwarf2_cu *cu, | |
2080 | struct dynamic_prop *prop); | |
2081 | ||
c906108c SS |
2082 | /* memory allocation interface */ |
2083 | ||
7b5a2f43 | 2084 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 2085 | |
b60c80d6 | 2086 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 2087 | |
43f3e411 | 2088 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 2089 | |
6e5a29e1 | 2090 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 2091 | |
6e5a29e1 | 2092 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 2093 | |
6e5a29e1 | 2094 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 2095 | |
6e5a29e1 | 2096 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 2097 | |
8cf6f0b1 TT |
2098 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
2099 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 2100 | const struct attribute *attr); |
8cf6f0b1 | 2101 | |
ff39bb5e | 2102 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 2103 | struct symbol *sym, |
f1e6e072 TT |
2104 | struct dwarf2_cu *cu, |
2105 | int is_block); | |
4c2df51b | 2106 | |
d521ce57 TT |
2107 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
2108 | const gdb_byte *info_ptr, | |
2109 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 2110 | |
72bf9492 DJ |
2111 | static void free_stack_comp_unit (void *); |
2112 | ||
72bf9492 DJ |
2113 | static hashval_t partial_die_hash (const void *item); |
2114 | ||
2115 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
2116 | ||
ae038cb0 | 2117 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 2118 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 2119 | |
9816fde3 | 2120 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 2121 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
2122 | |
2123 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
2124 | struct die_info *comp_unit_die, |
2125 | enum language pretend_language); | |
93311388 | 2126 | |
68dc6402 | 2127 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
2128 | |
2129 | static void free_cached_comp_units (void *); | |
2130 | ||
2131 | static void age_cached_comp_units (void); | |
2132 | ||
dee91e82 | 2133 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 2134 | |
f792889a DJ |
2135 | static struct type *set_die_type (struct die_info *, struct type *, |
2136 | struct dwarf2_cu *); | |
1c379e20 | 2137 | |
ae038cb0 DJ |
2138 | static void create_all_comp_units (struct objfile *); |
2139 | ||
0e50663e | 2140 | static int create_all_type_units (struct objfile *); |
1fd400ff | 2141 | |
95554aad TT |
2142 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
2143 | enum language); | |
10b3939b | 2144 | |
95554aad TT |
2145 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
2146 | enum language); | |
10b3939b | 2147 | |
f4dc4d17 DE |
2148 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
2149 | enum language); | |
2150 | ||
10b3939b DJ |
2151 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
2152 | struct dwarf2_per_cu_data *); | |
2153 | ||
ae038cb0 DJ |
2154 | static void dwarf2_mark (struct dwarf2_cu *); |
2155 | ||
2156 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
2157 | ||
b64f50a1 | 2158 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 2159 | struct dwarf2_per_cu_data *); |
673bfd45 | 2160 | |
f792889a | 2161 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 2162 | |
9291a0cd TT |
2163 | static void dwarf2_release_queue (void *dummy); |
2164 | ||
95554aad TT |
2165 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
2166 | enum language pretend_language); | |
2167 | ||
a0f42c21 | 2168 | static void process_queue (void); |
9291a0cd | 2169 | |
d721ba37 PA |
2170 | /* The return type of find_file_and_directory. Note, the enclosed |
2171 | string pointers are only valid while this object is valid. */ | |
2172 | ||
2173 | struct file_and_directory | |
2174 | { | |
2175 | /* The filename. This is never NULL. */ | |
2176 | const char *name; | |
2177 | ||
2178 | /* The compilation directory. NULL if not known. If we needed to | |
2179 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2180 | points directly to the DW_AT_comp_dir string attribute owned by | |
2181 | the obstack that owns the DIE. */ | |
2182 | const char *comp_dir; | |
2183 | ||
2184 | /* If we needed to build a new string for comp_dir, this is what | |
2185 | owns the storage. */ | |
2186 | std::string comp_dir_storage; | |
2187 | }; | |
2188 | ||
2189 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2190 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2191 | |
2192 | static char *file_full_name (int file, struct line_header *lh, | |
2193 | const char *comp_dir); | |
2194 | ||
43988095 JK |
2195 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2196 | enum class rcuh_kind { COMPILE, TYPE }; | |
2197 | ||
d521ce57 | 2198 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2199 | (struct comp_unit_head *header, |
2200 | struct dwarf2_section_info *section, | |
d521ce57 | 2201 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2202 | rcuh_kind section_kind); |
36586728 | 2203 | |
fd820528 | 2204 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2205 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2206 | int use_existing_cu, int keep, | |
3019eac3 DE |
2207 | die_reader_func_ftype *die_reader_func, void *data); |
2208 | ||
dee91e82 DE |
2209 | static void init_cutu_and_read_dies_simple |
2210 | (struct dwarf2_per_cu_data *this_cu, | |
2211 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2212 | |
673bfd45 | 2213 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2214 | |
3019eac3 DE |
2215 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2216 | ||
57d63ce2 DE |
2217 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2218 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2219 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2220 | |
2221 | static struct dwp_file *get_dwp_file (void); | |
2222 | ||
3019eac3 | 2223 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2224 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2225 | |
2226 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2227 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2228 | |
89e63ee4 DE |
2229 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2230 | ||
3019eac3 DE |
2231 | static void free_dwo_file_cleanup (void *); |
2232 | ||
95554aad TT |
2233 | static void process_cu_includes (void); |
2234 | ||
1b80a9fa | 2235 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2236 | |
2237 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2238 | \f |
2239 | /* Various complaints about symbol reading that don't abort the process. */ | |
2240 | ||
2241 | static void | |
2242 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2243 | { | |
2244 | complaint (&symfile_complaints, | |
2245 | _("statement list doesn't fit in .debug_line section")); | |
2246 | } | |
2247 | ||
2248 | static void | |
2249 | dwarf2_debug_line_missing_file_complaint (void) | |
2250 | { | |
2251 | complaint (&symfile_complaints, | |
2252 | _(".debug_line section has line data without a file")); | |
2253 | } | |
2254 | ||
2255 | static void | |
2256 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2257 | { | |
2258 | complaint (&symfile_complaints, | |
2259 | _(".debug_line section has line " | |
2260 | "program sequence without an end")); | |
2261 | } | |
2262 | ||
2263 | static void | |
2264 | dwarf2_complex_location_expr_complaint (void) | |
2265 | { | |
2266 | complaint (&symfile_complaints, _("location expression too complex")); | |
2267 | } | |
2268 | ||
2269 | static void | |
2270 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2271 | int arg3) | |
2272 | { | |
2273 | complaint (&symfile_complaints, | |
2274 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2275 | arg1, arg2, arg3); | |
2276 | } | |
2277 | ||
2278 | static void | |
2279 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2280 | { | |
2281 | complaint (&symfile_complaints, | |
2282 | _("debug info runs off end of %s section" | |
2283 | " [in module %s]"), | |
a32a8923 DE |
2284 | get_section_name (section), |
2285 | get_section_file_name (section)); | |
4390d890 | 2286 | } |
1b80a9fa | 2287 | |
4390d890 DE |
2288 | static void |
2289 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2290 | { | |
2291 | complaint (&symfile_complaints, | |
2292 | _("macro debug info contains a " | |
2293 | "malformed macro definition:\n`%s'"), | |
2294 | arg1); | |
2295 | } | |
2296 | ||
2297 | static void | |
2298 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2299 | { | |
2300 | complaint (&symfile_complaints, | |
2301 | _("invalid attribute class or form for '%s' in '%s'"), | |
2302 | arg1, arg2); | |
2303 | } | |
527f3840 JK |
2304 | |
2305 | /* Hash function for line_header_hash. */ | |
2306 | ||
2307 | static hashval_t | |
2308 | line_header_hash (const struct line_header *ofs) | |
2309 | { | |
9c541725 | 2310 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2311 | } |
2312 | ||
2313 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2314 | ||
2315 | static hashval_t | |
2316 | line_header_hash_voidp (const void *item) | |
2317 | { | |
9a3c8263 | 2318 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2319 | |
2320 | return line_header_hash (ofs); | |
2321 | } | |
2322 | ||
2323 | /* Equality function for line_header_hash. */ | |
2324 | ||
2325 | static int | |
2326 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2327 | { | |
9a3c8263 SM |
2328 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2329 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2330 | |
9c541725 | 2331 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2332 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2333 | } | |
2334 | ||
4390d890 | 2335 | \f |
9291a0cd | 2336 | |
31aa7e4e JB |
2337 | /* Read the given attribute value as an address, taking the attribute's |
2338 | form into account. */ | |
2339 | ||
2340 | static CORE_ADDR | |
2341 | attr_value_as_address (struct attribute *attr) | |
2342 | { | |
2343 | CORE_ADDR addr; | |
2344 | ||
2345 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2346 | { | |
2347 | /* Aside from a few clearly defined exceptions, attributes that | |
2348 | contain an address must always be in DW_FORM_addr form. | |
2349 | Unfortunately, some compilers happen to be violating this | |
2350 | requirement by encoding addresses using other forms, such | |
2351 | as DW_FORM_data4 for example. For those broken compilers, | |
2352 | we try to do our best, without any guarantee of success, | |
2353 | to interpret the address correctly. It would also be nice | |
2354 | to generate a complaint, but that would require us to maintain | |
2355 | a list of legitimate cases where a non-address form is allowed, | |
2356 | as well as update callers to pass in at least the CU's DWARF | |
2357 | version. This is more overhead than what we're willing to | |
2358 | expand for a pretty rare case. */ | |
2359 | addr = DW_UNSND (attr); | |
2360 | } | |
2361 | else | |
2362 | addr = DW_ADDR (attr); | |
2363 | ||
2364 | return addr; | |
2365 | } | |
2366 | ||
9291a0cd | 2367 | /* The suffix for an index file. */ |
437afbb8 JK |
2368 | #define INDEX4_SUFFIX ".gdb-index" |
2369 | #define INDEX5_SUFFIX ".debug_names" | |
2370 | #define DEBUG_STR_SUFFIX ".debug_str" | |
9291a0cd | 2371 | |
330cdd98 PA |
2372 | /* See declaration. */ |
2373 | ||
2374 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2375 | const dwarf2_debug_sections *names) | |
2376 | : objfile (objfile_) | |
2377 | { | |
2378 | if (names == NULL) | |
2379 | names = &dwarf2_elf_names; | |
2380 | ||
2381 | bfd *obfd = objfile->obfd; | |
2382 | ||
2383 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2384 | locate_sections (obfd, sec, *names); | |
2385 | } | |
2386 | ||
2387 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2388 | { | |
2389 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2390 | free_cached_comp_units (); | |
2391 | ||
2392 | if (quick_file_names_table) | |
2393 | htab_delete (quick_file_names_table); | |
2394 | ||
2395 | if (line_header_hash) | |
2396 | htab_delete (line_header_hash); | |
2397 | ||
2398 | /* Everything else should be on the objfile obstack. */ | |
2399 | } | |
2400 | ||
2401 | /* See declaration. */ | |
2402 | ||
2403 | void | |
2404 | dwarf2_per_objfile::free_cached_comp_units () | |
2405 | { | |
2406 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2407 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2408 | while (per_cu != NULL) | |
2409 | { | |
2410 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2411 | ||
2412 | free_heap_comp_unit (per_cu->cu); | |
2413 | *last_chain = next_cu; | |
2414 | per_cu = next_cu; | |
2415 | } | |
2416 | } | |
2417 | ||
c906108c | 2418 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2419 | information and return true if we have enough to do something. |
2420 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2421 | ELF names are used. */ | |
c906108c SS |
2422 | |
2423 | int | |
251d32d9 TG |
2424 | dwarf2_has_info (struct objfile *objfile, |
2425 | const struct dwarf2_debug_sections *names) | |
c906108c | 2426 | { |
97cbe998 SDJ |
2427 | if (objfile->flags & OBJF_READNEVER) |
2428 | return 0; | |
2429 | ||
9a3c8263 SM |
2430 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2431 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2432 | if (!dwarf2_per_objfile) |
2433 | { | |
2434 | /* Initialize per-objfile state. */ | |
2435 | struct dwarf2_per_objfile *data | |
8d749320 | 2436 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2437 | |
330cdd98 PA |
2438 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2439 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2440 | } |
73869dc2 | 2441 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2442 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2443 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2444 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2445 | } |
2446 | ||
2447 | /* Return the containing section of virtual section SECTION. */ | |
2448 | ||
2449 | static struct dwarf2_section_info * | |
2450 | get_containing_section (const struct dwarf2_section_info *section) | |
2451 | { | |
2452 | gdb_assert (section->is_virtual); | |
2453 | return section->s.containing_section; | |
c906108c SS |
2454 | } |
2455 | ||
a32a8923 DE |
2456 | /* Return the bfd owner of SECTION. */ |
2457 | ||
2458 | static struct bfd * | |
2459 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2460 | { | |
73869dc2 DE |
2461 | if (section->is_virtual) |
2462 | { | |
2463 | section = get_containing_section (section); | |
2464 | gdb_assert (!section->is_virtual); | |
2465 | } | |
049412e3 | 2466 | return section->s.section->owner; |
a32a8923 DE |
2467 | } |
2468 | ||
2469 | /* Return the bfd section of SECTION. | |
2470 | Returns NULL if the section is not present. */ | |
2471 | ||
2472 | static asection * | |
2473 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2474 | { | |
73869dc2 DE |
2475 | if (section->is_virtual) |
2476 | { | |
2477 | section = get_containing_section (section); | |
2478 | gdb_assert (!section->is_virtual); | |
2479 | } | |
049412e3 | 2480 | return section->s.section; |
a32a8923 DE |
2481 | } |
2482 | ||
2483 | /* Return the name of SECTION. */ | |
2484 | ||
2485 | static const char * | |
2486 | get_section_name (const struct dwarf2_section_info *section) | |
2487 | { | |
2488 | asection *sectp = get_section_bfd_section (section); | |
2489 | ||
2490 | gdb_assert (sectp != NULL); | |
2491 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2492 | } | |
2493 | ||
2494 | /* Return the name of the file SECTION is in. */ | |
2495 | ||
2496 | static const char * | |
2497 | get_section_file_name (const struct dwarf2_section_info *section) | |
2498 | { | |
2499 | bfd *abfd = get_section_bfd_owner (section); | |
2500 | ||
2501 | return bfd_get_filename (abfd); | |
2502 | } | |
2503 | ||
2504 | /* Return the id of SECTION. | |
2505 | Returns 0 if SECTION doesn't exist. */ | |
2506 | ||
2507 | static int | |
2508 | get_section_id (const struct dwarf2_section_info *section) | |
2509 | { | |
2510 | asection *sectp = get_section_bfd_section (section); | |
2511 | ||
2512 | if (sectp == NULL) | |
2513 | return 0; | |
2514 | return sectp->id; | |
2515 | } | |
2516 | ||
2517 | /* Return the flags of SECTION. | |
73869dc2 | 2518 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2519 | |
2520 | static int | |
2521 | get_section_flags (const struct dwarf2_section_info *section) | |
2522 | { | |
2523 | asection *sectp = get_section_bfd_section (section); | |
2524 | ||
2525 | gdb_assert (sectp != NULL); | |
2526 | return bfd_get_section_flags (sectp->owner, sectp); | |
2527 | } | |
2528 | ||
251d32d9 TG |
2529 | /* When loading sections, we look either for uncompressed section or for |
2530 | compressed section names. */ | |
233a11ab CS |
2531 | |
2532 | static int | |
251d32d9 TG |
2533 | section_is_p (const char *section_name, |
2534 | const struct dwarf2_section_names *names) | |
233a11ab | 2535 | { |
251d32d9 TG |
2536 | if (names->normal != NULL |
2537 | && strcmp (section_name, names->normal) == 0) | |
2538 | return 1; | |
2539 | if (names->compressed != NULL | |
2540 | && strcmp (section_name, names->compressed) == 0) | |
2541 | return 1; | |
2542 | return 0; | |
233a11ab CS |
2543 | } |
2544 | ||
330cdd98 | 2545 | /* See declaration. */ |
c906108c | 2546 | |
330cdd98 PA |
2547 | void |
2548 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2549 | const dwarf2_debug_sections &names) | |
c906108c | 2550 | { |
dc7650b8 | 2551 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2552 | |
dc7650b8 JK |
2553 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2554 | { | |
2555 | } | |
330cdd98 | 2556 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2557 | { |
330cdd98 PA |
2558 | this->info.s.section = sectp; |
2559 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2560 | } |
330cdd98 | 2561 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2562 | { |
330cdd98 PA |
2563 | this->abbrev.s.section = sectp; |
2564 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2565 | } |
330cdd98 | 2566 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2567 | { |
330cdd98 PA |
2568 | this->line.s.section = sectp; |
2569 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2570 | } |
330cdd98 | 2571 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2572 | { |
330cdd98 PA |
2573 | this->loc.s.section = sectp; |
2574 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2575 | } |
330cdd98 | 2576 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2577 | { |
330cdd98 PA |
2578 | this->loclists.s.section = sectp; |
2579 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2580 | } |
330cdd98 | 2581 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2582 | { |
330cdd98 PA |
2583 | this->macinfo.s.section = sectp; |
2584 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2585 | } |
330cdd98 | 2586 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2587 | { |
330cdd98 PA |
2588 | this->macro.s.section = sectp; |
2589 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2590 | } |
330cdd98 | 2591 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2592 | { |
330cdd98 PA |
2593 | this->str.s.section = sectp; |
2594 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2595 | } |
330cdd98 | 2596 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2597 | { |
330cdd98 PA |
2598 | this->line_str.s.section = sectp; |
2599 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2600 | } |
330cdd98 | 2601 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2602 | { |
330cdd98 PA |
2603 | this->addr.s.section = sectp; |
2604 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2605 | } |
330cdd98 | 2606 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2607 | { |
330cdd98 PA |
2608 | this->frame.s.section = sectp; |
2609 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2610 | } |
330cdd98 | 2611 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2612 | { |
330cdd98 PA |
2613 | this->eh_frame.s.section = sectp; |
2614 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2615 | } |
330cdd98 | 2616 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2617 | { |
330cdd98 PA |
2618 | this->ranges.s.section = sectp; |
2619 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2620 | } |
330cdd98 | 2621 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2622 | { |
330cdd98 PA |
2623 | this->rnglists.s.section = sectp; |
2624 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2625 | } |
330cdd98 | 2626 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2627 | { |
8b70b953 TT |
2628 | struct dwarf2_section_info type_section; |
2629 | ||
2630 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2631 | type_section.s.section = sectp; |
8b70b953 TT |
2632 | type_section.size = bfd_get_section_size (sectp); |
2633 | ||
330cdd98 | 2634 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2635 | &type_section); |
348e048f | 2636 | } |
330cdd98 | 2637 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2638 | { |
330cdd98 PA |
2639 | this->gdb_index.s.section = sectp; |
2640 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2641 | } |
927aa2e7 JK |
2642 | else if (section_is_p (sectp->name, &names.debug_names)) |
2643 | { | |
2644 | this->debug_names.s.section = sectp; | |
2645 | this->debug_names.size = bfd_get_section_size (sectp); | |
2646 | } | |
2647 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
2648 | { | |
2649 | this->debug_aranges.s.section = sectp; | |
2650 | this->debug_aranges.size = bfd_get_section_size (sectp); | |
2651 | } | |
dce234bc | 2652 | |
b4e1fd61 | 2653 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2654 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2655 | this->has_section_at_zero = true; |
c906108c SS |
2656 | } |
2657 | ||
fceca515 DE |
2658 | /* A helper function that decides whether a section is empty, |
2659 | or not present. */ | |
9e0ac564 TT |
2660 | |
2661 | static int | |
19ac8c2e | 2662 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2663 | { |
73869dc2 DE |
2664 | if (section->is_virtual) |
2665 | return section->size == 0; | |
049412e3 | 2666 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2667 | } |
2668 | ||
3019eac3 DE |
2669 | /* Read the contents of the section INFO. |
2670 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2671 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2672 | of the DWO file. | |
dce234bc | 2673 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2674 | |
dce234bc PP |
2675 | static void |
2676 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2677 | { |
a32a8923 | 2678 | asection *sectp; |
3019eac3 | 2679 | bfd *abfd; |
dce234bc | 2680 | gdb_byte *buf, *retbuf; |
c906108c | 2681 | |
be391dca TT |
2682 | if (info->readin) |
2683 | return; | |
dce234bc | 2684 | info->buffer = NULL; |
be391dca | 2685 | info->readin = 1; |
188dd5d6 | 2686 | |
9e0ac564 | 2687 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2688 | return; |
c906108c | 2689 | |
a32a8923 | 2690 | sectp = get_section_bfd_section (info); |
3019eac3 | 2691 | |
73869dc2 DE |
2692 | /* If this is a virtual section we need to read in the real one first. */ |
2693 | if (info->is_virtual) | |
2694 | { | |
2695 | struct dwarf2_section_info *containing_section = | |
2696 | get_containing_section (info); | |
2697 | ||
2698 | gdb_assert (sectp != NULL); | |
2699 | if ((sectp->flags & SEC_RELOC) != 0) | |
2700 | { | |
2701 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2702 | " supported in section %s [in module %s]"), | |
2703 | get_section_name (info), get_section_file_name (info)); | |
2704 | } | |
2705 | dwarf2_read_section (objfile, containing_section); | |
2706 | /* Other code should have already caught virtual sections that don't | |
2707 | fit. */ | |
2708 | gdb_assert (info->virtual_offset + info->size | |
2709 | <= containing_section->size); | |
2710 | /* If the real section is empty or there was a problem reading the | |
2711 | section we shouldn't get here. */ | |
2712 | gdb_assert (containing_section->buffer != NULL); | |
2713 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2714 | return; | |
2715 | } | |
2716 | ||
4bf44c1c TT |
2717 | /* If the section has relocations, we must read it ourselves. |
2718 | Otherwise we attach it to the BFD. */ | |
2719 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2720 | { |
d521ce57 | 2721 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2722 | return; |
dce234bc | 2723 | } |
dce234bc | 2724 | |
224c3ddb | 2725 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2726 | info->buffer = buf; |
dce234bc PP |
2727 | |
2728 | /* When debugging .o files, we may need to apply relocations; see | |
2729 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2730 | We never compress sections in .o files, so we only need to | |
2731 | try this when the section is not compressed. */ | |
ac8035ab | 2732 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2733 | if (retbuf != NULL) |
2734 | { | |
2735 | info->buffer = retbuf; | |
2736 | return; | |
2737 | } | |
2738 | ||
a32a8923 DE |
2739 | abfd = get_section_bfd_owner (info); |
2740 | gdb_assert (abfd != NULL); | |
2741 | ||
dce234bc PP |
2742 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2743 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2744 | { |
2745 | error (_("Dwarf Error: Can't read DWARF data" | |
2746 | " in section %s [in module %s]"), | |
2747 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2748 | } | |
dce234bc PP |
2749 | } |
2750 | ||
9e0ac564 TT |
2751 | /* A helper function that returns the size of a section in a safe way. |
2752 | If you are positive that the section has been read before using the | |
2753 | size, then it is safe to refer to the dwarf2_section_info object's | |
2754 | "size" field directly. In other cases, you must call this | |
2755 | function, because for compressed sections the size field is not set | |
2756 | correctly until the section has been read. */ | |
2757 | ||
2758 | static bfd_size_type | |
2759 | dwarf2_section_size (struct objfile *objfile, | |
2760 | struct dwarf2_section_info *info) | |
2761 | { | |
2762 | if (!info->readin) | |
2763 | dwarf2_read_section (objfile, info); | |
2764 | return info->size; | |
2765 | } | |
2766 | ||
dce234bc | 2767 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2768 | SECTION_NAME. */ |
af34e669 | 2769 | |
dce234bc | 2770 | void |
3017a003 TG |
2771 | dwarf2_get_section_info (struct objfile *objfile, |
2772 | enum dwarf2_section_enum sect, | |
d521ce57 | 2773 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2774 | bfd_size_type *sizep) |
2775 | { | |
2776 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2777 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2778 | dwarf2_objfile_data_key); | |
dce234bc | 2779 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2780 | |
2781 | /* We may see an objfile without any DWARF, in which case we just | |
2782 | return nothing. */ | |
2783 | if (data == NULL) | |
2784 | { | |
2785 | *sectp = NULL; | |
2786 | *bufp = NULL; | |
2787 | *sizep = 0; | |
2788 | return; | |
2789 | } | |
3017a003 TG |
2790 | switch (sect) |
2791 | { | |
2792 | case DWARF2_DEBUG_FRAME: | |
2793 | info = &data->frame; | |
2794 | break; | |
2795 | case DWARF2_EH_FRAME: | |
2796 | info = &data->eh_frame; | |
2797 | break; | |
2798 | default: | |
2799 | gdb_assert_not_reached ("unexpected section"); | |
2800 | } | |
dce234bc | 2801 | |
9e0ac564 | 2802 | dwarf2_read_section (objfile, info); |
dce234bc | 2803 | |
a32a8923 | 2804 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2805 | *bufp = info->buffer; |
2806 | *sizep = info->size; | |
2807 | } | |
2808 | ||
36586728 TT |
2809 | /* A helper function to find the sections for a .dwz file. */ |
2810 | ||
2811 | static void | |
2812 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2813 | { | |
9a3c8263 | 2814 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2815 | |
2816 | /* Note that we only support the standard ELF names, because .dwz | |
2817 | is ELF-only (at the time of writing). */ | |
2818 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2819 | { | |
049412e3 | 2820 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2821 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2822 | } | |
2823 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2824 | { | |
049412e3 | 2825 | dwz_file->info.s.section = sectp; |
36586728 TT |
2826 | dwz_file->info.size = bfd_get_section_size (sectp); |
2827 | } | |
2828 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2829 | { | |
049412e3 | 2830 | dwz_file->str.s.section = sectp; |
36586728 TT |
2831 | dwz_file->str.size = bfd_get_section_size (sectp); |
2832 | } | |
2833 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2834 | { | |
049412e3 | 2835 | dwz_file->line.s.section = sectp; |
36586728 TT |
2836 | dwz_file->line.size = bfd_get_section_size (sectp); |
2837 | } | |
2838 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2839 | { | |
049412e3 | 2840 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2841 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2842 | } | |
2ec9a5e0 TT |
2843 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2844 | { | |
049412e3 | 2845 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2846 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2847 | } | |
927aa2e7 JK |
2848 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2849 | { | |
2850 | dwz_file->debug_names.s.section = sectp; | |
2851 | dwz_file->debug_names.size = bfd_get_section_size (sectp); | |
2852 | } | |
36586728 TT |
2853 | } |
2854 | ||
4db1a1dc TT |
2855 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2856 | there is no .gnu_debugaltlink section in the file. Error if there | |
2857 | is such a section but the file cannot be found. */ | |
36586728 TT |
2858 | |
2859 | static struct dwz_file * | |
2860 | dwarf2_get_dwz_file (void) | |
2861 | { | |
36586728 TT |
2862 | const char *filename; |
2863 | struct dwz_file *result; | |
acd13123 | 2864 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2865 | size_t buildid_len; |
2866 | bfd_byte *buildid; | |
36586728 TT |
2867 | |
2868 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2869 | return dwarf2_per_objfile->dwz_file; | |
2870 | ||
4db1a1dc | 2871 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2872 | gdb::unique_xmalloc_ptr<char> data |
2873 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2874 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2875 | if (data == NULL) |
2876 | { | |
2877 | if (bfd_get_error () == bfd_error_no_error) | |
2878 | return NULL; | |
2879 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2880 | bfd_errmsg (bfd_get_error ())); | |
2881 | } | |
791afaa2 TT |
2882 | |
2883 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2884 | |
acd13123 TT |
2885 | buildid_len = (size_t) buildid_len_arg; |
2886 | ||
791afaa2 | 2887 | filename = data.get (); |
d721ba37 PA |
2888 | |
2889 | std::string abs_storage; | |
36586728 TT |
2890 | if (!IS_ABSOLUTE_PATH (filename)) |
2891 | { | |
14278e1f TT |
2892 | gdb::unique_xmalloc_ptr<char> abs |
2893 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2894 | |
14278e1f | 2895 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2896 | filename = abs_storage.c_str (); |
36586728 TT |
2897 | } |
2898 | ||
dc294be5 TT |
2899 | /* First try the file name given in the section. If that doesn't |
2900 | work, try to use the build-id instead. */ | |
192b62ce | 2901 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2902 | if (dwz_bfd != NULL) |
36586728 | 2903 | { |
192b62ce TT |
2904 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2905 | dwz_bfd.release (); | |
36586728 TT |
2906 | } |
2907 | ||
dc294be5 TT |
2908 | if (dwz_bfd == NULL) |
2909 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2910 | ||
2911 | if (dwz_bfd == NULL) | |
2912 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2913 | objfile_name (dwarf2_per_objfile->objfile)); | |
2914 | ||
36586728 TT |
2915 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2916 | struct dwz_file); | |
192b62ce | 2917 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2918 | |
192b62ce | 2919 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 | 2920 | |
192b62ce | 2921 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2922 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2923 | return result; |
2924 | } | |
9291a0cd | 2925 | \f |
7b9f3c50 DE |
2926 | /* DWARF quick_symbols_functions support. */ |
2927 | ||
2928 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2929 | unique line tables, so we maintain a separate table of all .debug_line | |
2930 | derived entries to support the sharing. | |
2931 | All the quick functions need is the list of file names. We discard the | |
2932 | line_header when we're done and don't need to record it here. */ | |
2933 | struct quick_file_names | |
2934 | { | |
094b34ac DE |
2935 | /* The data used to construct the hash key. */ |
2936 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2937 | |
2938 | /* The number of entries in file_names, real_names. */ | |
2939 | unsigned int num_file_names; | |
2940 | ||
2941 | /* The file names from the line table, after being run through | |
2942 | file_full_name. */ | |
2943 | const char **file_names; | |
2944 | ||
2945 | /* The file names from the line table after being run through | |
2946 | gdb_realpath. These are computed lazily. */ | |
2947 | const char **real_names; | |
2948 | }; | |
2949 | ||
2950 | /* When using the index (and thus not using psymtabs), each CU has an | |
2951 | object of this type. This is used to hold information needed by | |
2952 | the various "quick" methods. */ | |
2953 | struct dwarf2_per_cu_quick_data | |
2954 | { | |
2955 | /* The file table. This can be NULL if there was no file table | |
2956 | or it's currently not read in. | |
2957 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2958 | struct quick_file_names *file_names; | |
2959 | ||
2960 | /* The corresponding symbol table. This is NULL if symbols for this | |
2961 | CU have not yet been read. */ | |
43f3e411 | 2962 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2963 | |
2964 | /* A temporary mark bit used when iterating over all CUs in | |
2965 | expand_symtabs_matching. */ | |
2966 | unsigned int mark : 1; | |
2967 | ||
2968 | /* True if we've tried to read the file table and found there isn't one. | |
2969 | There will be no point in trying to read it again next time. */ | |
2970 | unsigned int no_file_data : 1; | |
2971 | }; | |
2972 | ||
094b34ac DE |
2973 | /* Utility hash function for a stmt_list_hash. */ |
2974 | ||
2975 | static hashval_t | |
2976 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2977 | { | |
2978 | hashval_t v = 0; | |
2979 | ||
2980 | if (stmt_list_hash->dwo_unit != NULL) | |
2981 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2982 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2983 | return v; |
2984 | } | |
2985 | ||
2986 | /* Utility equality function for a stmt_list_hash. */ | |
2987 | ||
2988 | static int | |
2989 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2990 | const struct stmt_list_hash *rhs) | |
2991 | { | |
2992 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2993 | return 0; | |
2994 | if (lhs->dwo_unit != NULL | |
2995 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2996 | return 0; | |
2997 | ||
9c541725 | 2998 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2999 | } |
3000 | ||
7b9f3c50 DE |
3001 | /* Hash function for a quick_file_names. */ |
3002 | ||
3003 | static hashval_t | |
3004 | hash_file_name_entry (const void *e) | |
3005 | { | |
9a3c8263 SM |
3006 | const struct quick_file_names *file_data |
3007 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 3008 | |
094b34ac | 3009 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
3010 | } |
3011 | ||
3012 | /* Equality function for a quick_file_names. */ | |
3013 | ||
3014 | static int | |
3015 | eq_file_name_entry (const void *a, const void *b) | |
3016 | { | |
9a3c8263 SM |
3017 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
3018 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 3019 | |
094b34ac | 3020 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
3021 | } |
3022 | ||
3023 | /* Delete function for a quick_file_names. */ | |
3024 | ||
3025 | static void | |
3026 | delete_file_name_entry (void *e) | |
3027 | { | |
9a3c8263 | 3028 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
3029 | int i; |
3030 | ||
3031 | for (i = 0; i < file_data->num_file_names; ++i) | |
3032 | { | |
3033 | xfree ((void*) file_data->file_names[i]); | |
3034 | if (file_data->real_names) | |
3035 | xfree ((void*) file_data->real_names[i]); | |
3036 | } | |
3037 | ||
3038 | /* The space for the struct itself lives on objfile_obstack, | |
3039 | so we don't free it here. */ | |
3040 | } | |
3041 | ||
3042 | /* Create a quick_file_names hash table. */ | |
3043 | ||
3044 | static htab_t | |
3045 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
3046 | { | |
3047 | return htab_create_alloc (nr_initial_entries, | |
3048 | hash_file_name_entry, eq_file_name_entry, | |
3049 | delete_file_name_entry, xcalloc, xfree); | |
3050 | } | |
9291a0cd | 3051 | |
918dd910 JK |
3052 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
3053 | have to be created afterwards. You should call age_cached_comp_units after | |
3054 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
3055 | ||
3056 | static void | |
3057 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
3058 | { | |
3019eac3 | 3059 | if (per_cu->is_debug_types) |
e5fe5e75 | 3060 | load_full_type_unit (per_cu); |
918dd910 | 3061 | else |
95554aad | 3062 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 3063 | |
cc12ce38 DE |
3064 | if (per_cu->cu == NULL) |
3065 | return; /* Dummy CU. */ | |
2dc860c0 DE |
3066 | |
3067 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
3068 | } |
3069 | ||
a0f42c21 | 3070 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 3071 | |
9291a0cd | 3072 | static void |
a0f42c21 | 3073 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
3074 | { |
3075 | struct cleanup *back_to; | |
3076 | ||
f4dc4d17 DE |
3077 | /* Skip type_unit_groups, reading the type units they contain |
3078 | is handled elsewhere. */ | |
3079 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
3080 | return; | |
3081 | ||
9291a0cd TT |
3082 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
3083 | ||
95554aad | 3084 | if (dwarf2_per_objfile->using_index |
43f3e411 | 3085 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
3086 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
3087 | { | |
3088 | queue_comp_unit (per_cu, language_minimal); | |
3089 | load_cu (per_cu); | |
89e63ee4 DE |
3090 | |
3091 | /* If we just loaded a CU from a DWO, and we're working with an index | |
3092 | that may badly handle TUs, load all the TUs in that DWO as well. | |
3093 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
3094 | if (!per_cu->is_debug_types | |
cc12ce38 | 3095 | && per_cu->cu != NULL |
89e63ee4 DE |
3096 | && per_cu->cu->dwo_unit != NULL |
3097 | && dwarf2_per_objfile->index_table != NULL | |
3098 | && dwarf2_per_objfile->index_table->version <= 7 | |
3099 | /* DWP files aren't supported yet. */ | |
3100 | && get_dwp_file () == NULL) | |
3101 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 3102 | } |
9291a0cd | 3103 | |
a0f42c21 | 3104 | process_queue (); |
9291a0cd TT |
3105 | |
3106 | /* Age the cache, releasing compilation units that have not | |
3107 | been used recently. */ | |
3108 | age_cached_comp_units (); | |
3109 | ||
3110 | do_cleanups (back_to); | |
3111 | } | |
3112 | ||
3113 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
3114 | the objfile from which this CU came. Returns the resulting symbol | |
3115 | table. */ | |
2fdf6df6 | 3116 | |
43f3e411 | 3117 | static struct compunit_symtab * |
a0f42c21 | 3118 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 3119 | { |
95554aad | 3120 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 3121 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3122 | { |
3123 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 3124 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 3125 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 3126 | process_cu_includes (); |
9291a0cd TT |
3127 | do_cleanups (back_to); |
3128 | } | |
f194fefb | 3129 | |
43f3e411 | 3130 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
3131 | } |
3132 | ||
8832e7e3 | 3133 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
3134 | |
3135 | This is intended for loops like: | |
3136 | ||
3137 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
3138 | + dwarf2_per_objfile->n_type_units); ++i) | |
3139 | { | |
8832e7e3 | 3140 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
3141 | |
3142 | ...; | |
3143 | } | |
3144 | */ | |
2fdf6df6 | 3145 | |
1fd400ff | 3146 | static struct dwarf2_per_cu_data * |
8832e7e3 | 3147 | dw2_get_cutu (int index) |
1fd400ff TT |
3148 | { |
3149 | if (index >= dwarf2_per_objfile->n_comp_units) | |
3150 | { | |
f4dc4d17 | 3151 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
3152 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
3153 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
3154 | } |
3155 | ||
3156 | return dwarf2_per_objfile->all_comp_units[index]; | |
3157 | } | |
3158 | ||
8832e7e3 DE |
3159 | /* Return the CU given its index. |
3160 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
3161 | refers to a CU. */ | |
f4dc4d17 DE |
3162 | |
3163 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 3164 | dw2_get_cu (int index) |
f4dc4d17 | 3165 | { |
8832e7e3 | 3166 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 3167 | |
1fd400ff TT |
3168 | return dwarf2_per_objfile->all_comp_units[index]; |
3169 | } | |
3170 | ||
4b514bc8 JK |
3171 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
3172 | objfile_obstack, and constructed with the specified field | |
3173 | values. */ | |
3174 | ||
3175 | static dwarf2_per_cu_data * | |
3176 | create_cu_from_index_list (struct objfile *objfile, | |
3177 | struct dwarf2_section_info *section, | |
3178 | int is_dwz, | |
3179 | sect_offset sect_off, ULONGEST length) | |
3180 | { | |
3181 | dwarf2_per_cu_data *the_cu | |
3182 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3183 | struct dwarf2_per_cu_data); | |
3184 | the_cu->sect_off = sect_off; | |
3185 | the_cu->length = length; | |
3186 | the_cu->objfile = objfile; | |
3187 | the_cu->section = section; | |
3188 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3189 | struct dwarf2_per_cu_quick_data); | |
3190 | the_cu->is_dwz = is_dwz; | |
3191 | return the_cu; | |
3192 | } | |
3193 | ||
2ec9a5e0 TT |
3194 | /* A helper for create_cus_from_index that handles a given list of |
3195 | CUs. */ | |
2fdf6df6 | 3196 | |
74a0d9f6 | 3197 | static void |
2ec9a5e0 TT |
3198 | create_cus_from_index_list (struct objfile *objfile, |
3199 | const gdb_byte *cu_list, offset_type n_elements, | |
3200 | struct dwarf2_section_info *section, | |
3201 | int is_dwz, | |
3202 | int base_offset) | |
9291a0cd TT |
3203 | { |
3204 | offset_type i; | |
9291a0cd | 3205 | |
2ec9a5e0 | 3206 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3207 | { |
74a0d9f6 | 3208 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3209 | |
3210 | sect_offset sect_off | |
3211 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3212 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3213 | cu_list += 2 * 8; |
3214 | ||
4b514bc8 JK |
3215 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] |
3216 | = create_cu_from_index_list (objfile, section, is_dwz, sect_off, length); | |
9291a0cd | 3217 | } |
9291a0cd TT |
3218 | } |
3219 | ||
2ec9a5e0 | 3220 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3221 | the CU objects for this objfile. */ |
2ec9a5e0 | 3222 | |
74a0d9f6 | 3223 | static void |
2ec9a5e0 TT |
3224 | create_cus_from_index (struct objfile *objfile, |
3225 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3226 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3227 | { | |
3228 | struct dwz_file *dwz; | |
3229 | ||
3230 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3231 | dwarf2_per_objfile->all_comp_units = |
3232 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3233 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3234 | |
74a0d9f6 JK |
3235 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3236 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3237 | |
3238 | if (dwz_elements == 0) | |
74a0d9f6 | 3239 | return; |
2ec9a5e0 TT |
3240 | |
3241 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3242 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3243 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3244 | } |
3245 | ||
1fd400ff | 3246 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3247 | |
74a0d9f6 | 3248 | static void |
673bfd45 | 3249 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3250 | struct dwarf2_section_info *section, |
673bfd45 DE |
3251 | const gdb_byte *bytes, |
3252 | offset_type elements) | |
1fd400ff TT |
3253 | { |
3254 | offset_type i; | |
673bfd45 | 3255 | htab_t sig_types_hash; |
1fd400ff | 3256 | |
6aa5f3a6 DE |
3257 | dwarf2_per_objfile->n_type_units |
3258 | = dwarf2_per_objfile->n_allocated_type_units | |
3259 | = elements / 3; | |
8d749320 SM |
3260 | dwarf2_per_objfile->all_type_units = |
3261 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3262 | |
673bfd45 | 3263 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3264 | |
3265 | for (i = 0; i < elements; i += 3) | |
3266 | { | |
52dc124a | 3267 | struct signatured_type *sig_type; |
9c541725 | 3268 | ULONGEST signature; |
1fd400ff | 3269 | void **slot; |
9c541725 | 3270 | cu_offset type_offset_in_tu; |
1fd400ff | 3271 | |
74a0d9f6 | 3272 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3273 | sect_offset sect_off |
3274 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3275 | type_offset_in_tu | |
3276 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3277 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3278 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3279 | bytes += 3 * 8; | |
3280 | ||
52dc124a | 3281 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3282 | struct signatured_type); |
52dc124a | 3283 | sig_type->signature = signature; |
9c541725 | 3284 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3285 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3286 | sig_type->per_cu.section = section; |
9c541725 | 3287 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3288 | sig_type->per_cu.objfile = objfile; |
3289 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3290 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3291 | struct dwarf2_per_cu_quick_data); | |
3292 | ||
52dc124a DE |
3293 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3294 | *slot = sig_type; | |
1fd400ff | 3295 | |
b4dd5633 | 3296 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3297 | } |
3298 | ||
673bfd45 | 3299 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3300 | } |
3301 | ||
927aa2e7 JK |
3302 | /* Create the signatured type hash table from .debug_names. */ |
3303 | ||
3304 | static void | |
3305 | create_signatured_type_table_from_debug_names | |
3306 | (struct objfile *objfile, | |
3307 | const mapped_debug_names &map, | |
3308 | struct dwarf2_section_info *section, | |
3309 | struct dwarf2_section_info *abbrev_section) | |
3310 | { | |
3311 | dwarf2_read_section (objfile, section); | |
3312 | dwarf2_read_section (objfile, abbrev_section); | |
3313 | ||
3314 | dwarf2_per_objfile->n_type_units | |
3315 | = dwarf2_per_objfile->n_allocated_type_units | |
3316 | = map.tu_count; | |
3317 | dwarf2_per_objfile->all_type_units | |
3318 | = XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
3319 | ||
3320 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); | |
3321 | ||
3322 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
3323 | { | |
3324 | struct signatured_type *sig_type; | |
3325 | ULONGEST signature; | |
3326 | void **slot; | |
3327 | cu_offset type_offset_in_tu; | |
3328 | ||
3329 | sect_offset sect_off | |
3330 | = (sect_offset) (extract_unsigned_integer | |
3331 | (map.tu_table_reordered + i * map.offset_size, | |
3332 | map.offset_size, | |
3333 | map.dwarf5_byte_order)); | |
3334 | ||
3335 | comp_unit_head cu_header; | |
3336 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
3337 | section->buffer + to_underlying (sect_off), | |
3338 | rcuh_kind::TYPE); | |
3339 | ||
3340 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3341 | struct signatured_type); | |
3342 | sig_type->signature = cu_header.signature; | |
3343 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
3344 | sig_type->per_cu.is_debug_types = 1; | |
3345 | sig_type->per_cu.section = section; | |
3346 | sig_type->per_cu.sect_off = sect_off; | |
3347 | sig_type->per_cu.objfile = objfile; | |
3348 | sig_type->per_cu.v.quick | |
3349 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3350 | struct dwarf2_per_cu_quick_data); | |
3351 | ||
3352 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); | |
3353 | *slot = sig_type; | |
3354 | ||
3355 | dwarf2_per_objfile->all_type_units[i] = sig_type; | |
3356 | } | |
3357 | ||
3358 | dwarf2_per_objfile->signatured_types = sig_types_hash; | |
3359 | } | |
3360 | ||
9291a0cd TT |
3361 | /* Read the address map data from the mapped index, and use it to |
3362 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3363 | |
9291a0cd TT |
3364 | static void |
3365 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3366 | { | |
3e29f34a | 3367 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3368 | const gdb_byte *iter, *end; |
9291a0cd | 3369 | struct addrmap *mutable_map; |
9291a0cd TT |
3370 | CORE_ADDR baseaddr; |
3371 | ||
8268c778 PA |
3372 | auto_obstack temp_obstack; |
3373 | ||
9291a0cd TT |
3374 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3375 | ||
f00a2de2 PA |
3376 | iter = index->address_table.data (); |
3377 | end = iter + index->address_table.size (); | |
9291a0cd TT |
3378 | |
3379 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3380 | ||
3381 | while (iter < end) | |
3382 | { | |
3383 | ULONGEST hi, lo, cu_index; | |
3384 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3385 | iter += 8; | |
3386 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3387 | iter += 8; | |
3388 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3389 | iter += 4; | |
f652bce2 | 3390 | |
24a55014 | 3391 | if (lo > hi) |
f652bce2 | 3392 | { |
24a55014 DE |
3393 | complaint (&symfile_complaints, |
3394 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3395 | hex_string (lo), hex_string (hi)); |
24a55014 | 3396 | continue; |
f652bce2 | 3397 | } |
24a55014 DE |
3398 | |
3399 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3400 | { |
3401 | complaint (&symfile_complaints, | |
3402 | _(".gdb_index address table has invalid CU number %u"), | |
3403 | (unsigned) cu_index); | |
24a55014 | 3404 | continue; |
f652bce2 | 3405 | } |
24a55014 | 3406 | |
3e29f34a MR |
3407 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3408 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3409 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3410 | } |
3411 | ||
3412 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3413 | &objfile->objfile_obstack); | |
9291a0cd TT |
3414 | } |
3415 | ||
927aa2e7 JK |
3416 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
3417 | populate the objfile's psymtabs_addrmap. */ | |
3418 | ||
3419 | static void | |
3420 | create_addrmap_from_aranges (struct objfile *objfile, | |
3421 | struct dwarf2_section_info *section) | |
3422 | { | |
3423 | bfd *abfd = objfile->obfd; | |
3424 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
3425 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
3426 | SECT_OFF_TEXT (objfile)); | |
3427 | ||
3428 | auto_obstack temp_obstack; | |
3429 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
3430 | ||
3431 | std::unordered_map<sect_offset, | |
3432 | dwarf2_per_cu_data *, | |
3433 | gdb::hash_enum<sect_offset>> | |
3434 | debug_info_offset_to_per_cu; | |
3435 | for (int cui = 0; cui < dwarf2_per_objfile->n_comp_units; ++cui) | |
3436 | { | |
3437 | dwarf2_per_cu_data *per_cu = dw2_get_cutu (cui); | |
3438 | const auto insertpair | |
3439 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
3440 | if (!insertpair.second) | |
3441 | { | |
3442 | warning (_("Section .debug_aranges in %s has duplicate " | |
3443 | "debug_info_offset %u, ignoring .debug_aranges."), | |
3444 | objfile_name (objfile), to_underlying (per_cu->sect_off)); | |
3445 | return; | |
3446 | } | |
3447 | } | |
3448 | ||
3449 | dwarf2_read_section (objfile, section); | |
3450 | ||
3451 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
3452 | ||
3453 | const gdb_byte *addr = section->buffer; | |
3454 | ||
3455 | while (addr < section->buffer + section->size) | |
3456 | { | |
3457 | const gdb_byte *const entry_addr = addr; | |
3458 | unsigned int bytes_read; | |
3459 | ||
3460 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
3461 | &bytes_read); | |
3462 | addr += bytes_read; | |
3463 | ||
3464 | const gdb_byte *const entry_end = addr + entry_length; | |
3465 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
3466 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
3467 | if (addr + entry_length > section->buffer + section->size) | |
3468 | { | |
3469 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3470 | "length %s exceeds section length %s, " | |
3471 | "ignoring .debug_aranges."), | |
3472 | objfile_name (objfile), entry_addr - section->buffer, | |
3473 | plongest (bytes_read + entry_length), | |
3474 | pulongest (section->size)); | |
3475 | return; | |
3476 | } | |
3477 | ||
3478 | /* The version number. */ | |
3479 | const uint16_t version = read_2_bytes (abfd, addr); | |
3480 | addr += 2; | |
3481 | if (version != 2) | |
3482 | { | |
3483 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3484 | "has unsupported version %d, ignoring .debug_aranges."), | |
3485 | objfile_name (objfile), entry_addr - section->buffer, | |
3486 | version); | |
3487 | return; | |
3488 | } | |
3489 | ||
3490 | const uint64_t debug_info_offset | |
3491 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
3492 | addr += offset_size; | |
3493 | const auto per_cu_it | |
3494 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
3495 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
3496 | { | |
3497 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3498 | "debug_info_offset %s does not exists, " | |
3499 | "ignoring .debug_aranges."), | |
3500 | objfile_name (objfile), entry_addr - section->buffer, | |
3501 | pulongest (debug_info_offset)); | |
3502 | return; | |
3503 | } | |
3504 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
3505 | ||
3506 | const uint8_t address_size = *addr++; | |
3507 | if (address_size < 1 || address_size > 8) | |
3508 | { | |
3509 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3510 | "address_size %u is invalid, ignoring .debug_aranges."), | |
3511 | objfile_name (objfile), entry_addr - section->buffer, | |
3512 | address_size); | |
3513 | return; | |
3514 | } | |
3515 | ||
3516 | const uint8_t segment_selector_size = *addr++; | |
3517 | if (segment_selector_size != 0) | |
3518 | { | |
3519 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3520 | "segment_selector_size %u is not supported, " | |
3521 | "ignoring .debug_aranges."), | |
3522 | objfile_name (objfile), entry_addr - section->buffer, | |
3523 | segment_selector_size); | |
3524 | return; | |
3525 | } | |
3526 | ||
3527 | /* Must pad to an alignment boundary that is twice the address | |
3528 | size. It is undocumented by the DWARF standard but GCC does | |
3529 | use it. */ | |
3530 | for (size_t padding = ((-(addr - section->buffer)) | |
3531 | & (2 * address_size - 1)); | |
3532 | padding > 0; padding--) | |
3533 | if (*addr++ != 0) | |
3534 | { | |
3535 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3536 | "padding is not zero, ignoring .debug_aranges."), | |
3537 | objfile_name (objfile), entry_addr - section->buffer); | |
3538 | return; | |
3539 | } | |
3540 | ||
3541 | for (;;) | |
3542 | { | |
3543 | if (addr + 2 * address_size > entry_end) | |
3544 | { | |
3545 | warning (_("Section .debug_aranges in %s entry at offset %zu " | |
3546 | "address list is not properly terminated, " | |
3547 | "ignoring .debug_aranges."), | |
3548 | objfile_name (objfile), entry_addr - section->buffer); | |
3549 | return; | |
3550 | } | |
3551 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
3552 | dwarf5_byte_order); | |
3553 | addr += address_size; | |
3554 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
3555 | dwarf5_byte_order); | |
3556 | addr += address_size; | |
3557 | if (start == 0 && length == 0) | |
3558 | break; | |
3559 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
3560 | { | |
3561 | /* Symbol was eliminated due to a COMDAT group. */ | |
3562 | continue; | |
3563 | } | |
3564 | ULONGEST end = start + length; | |
3565 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr); | |
3566 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr); | |
3567 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); | |
3568 | } | |
3569 | } | |
3570 | ||
3571 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3572 | &objfile->objfile_obstack); | |
3573 | } | |
3574 | ||
59d7bcaf JK |
3575 | /* The hash function for strings in the mapped index. This is the same as |
3576 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3577 | implementation. This is necessary because the hash function is tied to the | |
3578 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3579 | SYMBOL_HASH_NEXT. |
3580 | ||
3581 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3582 | |
9291a0cd | 3583 | static hashval_t |
559a7a62 | 3584 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3585 | { |
3586 | const unsigned char *str = (const unsigned char *) p; | |
3587 | hashval_t r = 0; | |
3588 | unsigned char c; | |
3589 | ||
3590 | while ((c = *str++) != 0) | |
559a7a62 JK |
3591 | { |
3592 | if (index_version >= 5) | |
3593 | c = tolower (c); | |
3594 | r = r * 67 + c - 113; | |
3595 | } | |
9291a0cd TT |
3596 | |
3597 | return r; | |
3598 | } | |
3599 | ||
3600 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3601 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3602 | constant pool and return true. If NAME cannot be found, return |
3603 | false. */ | |
2fdf6df6 | 3604 | |
109483d9 | 3605 | static bool |
9291a0cd TT |
3606 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3607 | offset_type **vec_out) | |
3608 | { | |
0cf03b49 | 3609 | offset_type hash; |
9291a0cd | 3610 | offset_type slot, step; |
559a7a62 | 3611 | int (*cmp) (const char *, const char *); |
9291a0cd | 3612 | |
791afaa2 | 3613 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3614 | if (current_language->la_language == language_cplus |
45280282 IB |
3615 | || current_language->la_language == language_fortran |
3616 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3617 | { |
3618 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3619 | not contain any. */ | |
a8719064 | 3620 | |
72998fb3 | 3621 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3622 | { |
109483d9 | 3623 | without_params = cp_remove_params (name); |
0cf03b49 | 3624 | |
72998fb3 | 3625 | if (without_params != NULL) |
791afaa2 | 3626 | name = without_params.get (); |
0cf03b49 JK |
3627 | } |
3628 | } | |
3629 | ||
559a7a62 | 3630 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3631 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3632 | simulate our NAME being searched is also lowercased. */ |
3633 | hash = mapped_index_string_hash ((index->version == 4 | |
3634 | && case_sensitivity == case_sensitive_off | |
3635 | ? 5 : index->version), | |
3636 | name); | |
3637 | ||
f00a2de2 PA |
3638 | slot = hash & (index->symbol_table.size () - 1); |
3639 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 3640 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3641 | |
3642 | for (;;) | |
3643 | { | |
9291a0cd | 3644 | const char *str; |
f00a2de2 PA |
3645 | |
3646 | const auto &bucket = index->symbol_table[slot]; | |
3647 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 3648 | return false; |
9291a0cd | 3649 | |
f00a2de2 | 3650 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 3651 | if (!cmp (name, str)) |
9291a0cd TT |
3652 | { |
3653 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 3654 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 3655 | return true; |
9291a0cd TT |
3656 | } |
3657 | ||
f00a2de2 | 3658 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
3659 | } |
3660 | } | |
3661 | ||
2ec9a5e0 TT |
3662 | /* A helper function that reads the .gdb_index from SECTION and fills |
3663 | in MAP. FILENAME is the name of the file containing the section; | |
3664 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3665 | ok to use deprecated sections. | |
3666 | ||
3667 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3668 | out parameters that are filled in with information about the CU and | |
3669 | TU lists in the section. | |
3670 | ||
3671 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3672 | |
9291a0cd | 3673 | static int |
2ec9a5e0 TT |
3674 | read_index_from_section (struct objfile *objfile, |
3675 | const char *filename, | |
3676 | int deprecated_ok, | |
3677 | struct dwarf2_section_info *section, | |
3678 | struct mapped_index *map, | |
3679 | const gdb_byte **cu_list, | |
3680 | offset_type *cu_list_elements, | |
3681 | const gdb_byte **types_list, | |
3682 | offset_type *types_list_elements) | |
9291a0cd | 3683 | { |
948f8e3d | 3684 | const gdb_byte *addr; |
2ec9a5e0 | 3685 | offset_type version; |
b3b272e1 | 3686 | offset_type *metadata; |
1fd400ff | 3687 | int i; |
9291a0cd | 3688 | |
2ec9a5e0 | 3689 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3690 | return 0; |
82430852 JK |
3691 | |
3692 | /* Older elfutils strip versions could keep the section in the main | |
3693 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3694 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3695 | return 0; |
3696 | ||
2ec9a5e0 | 3697 | dwarf2_read_section (objfile, section); |
9291a0cd | 3698 | |
2ec9a5e0 | 3699 | addr = section->buffer; |
9291a0cd | 3700 | /* Version check. */ |
1fd400ff | 3701 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3702 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3703 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3704 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3705 | indices. */ |
831adc1f | 3706 | if (version < 4) |
481860b3 GB |
3707 | { |
3708 | static int warning_printed = 0; | |
3709 | if (!warning_printed) | |
3710 | { | |
3711 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3712 | filename); |
481860b3 GB |
3713 | warning_printed = 1; |
3714 | } | |
3715 | return 0; | |
3716 | } | |
3717 | /* Index version 4 uses a different hash function than index version | |
3718 | 5 and later. | |
3719 | ||
3720 | Versions earlier than 6 did not emit psymbols for inlined | |
3721 | functions. Using these files will cause GDB not to be able to | |
3722 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3723 | indices unless the user has done |
3724 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3725 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3726 | { |
3727 | static int warning_printed = 0; | |
3728 | if (!warning_printed) | |
3729 | { | |
e615022a DE |
3730 | warning (_("\ |
3731 | Skipping deprecated .gdb_index section in %s.\n\ | |
3732 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3733 | to use the section anyway."), | |
2ec9a5e0 | 3734 | filename); |
481860b3 GB |
3735 | warning_printed = 1; |
3736 | } | |
3737 | return 0; | |
3738 | } | |
796a7ff8 | 3739 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3740 | of the TU (for symbols coming from TUs), |
3741 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3742 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3743 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3744 | These are just performance bugs, and we can't distinguish gdb-generated | |
3745 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3746 | |
481860b3 | 3747 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3748 | longer backward compatible. */ |
796a7ff8 | 3749 | if (version > 8) |
594e8718 | 3750 | return 0; |
9291a0cd | 3751 | |
559a7a62 | 3752 | map->version = version; |
2ec9a5e0 | 3753 | map->total_size = section->size; |
9291a0cd TT |
3754 | |
3755 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3756 | |
3757 | i = 0; | |
2ec9a5e0 TT |
3758 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3759 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3760 | / 8); | |
1fd400ff TT |
3761 | ++i; |
3762 | ||
2ec9a5e0 TT |
3763 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3764 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3765 | - MAYBE_SWAP (metadata[i])) | |
3766 | / 8); | |
987d643c | 3767 | ++i; |
1fd400ff | 3768 | |
f00a2de2 PA |
3769 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
3770 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3771 | map->address_table | |
3772 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
3773 | ++i; |
3774 | ||
f00a2de2 PA |
3775 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
3776 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3777 | map->symbol_table | |
3778 | = gdb::array_view<mapped_index::symbol_table_slot> | |
3779 | ((mapped_index::symbol_table_slot *) symbol_table, | |
3780 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 3781 | |
f00a2de2 | 3782 | ++i; |
f9d83a0b | 3783 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3784 | |
2ec9a5e0 TT |
3785 | return 1; |
3786 | } | |
3787 | ||
927aa2e7 | 3788 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
3789 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3790 | ||
3791 | static int | |
3792 | dwarf2_read_index (struct objfile *objfile) | |
3793 | { | |
3794 | struct mapped_index local_map, *map; | |
3795 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3796 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3797 | struct dwz_file *dwz; |
2ec9a5e0 | 3798 | |
4262abfb | 3799 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3800 | use_deprecated_index_sections, |
3801 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3802 | &cu_list, &cu_list_elements, | |
3803 | &types_list, &types_list_elements)) | |
3804 | return 0; | |
3805 | ||
0fefef59 | 3806 | /* Don't use the index if it's empty. */ |
f00a2de2 | 3807 | if (local_map.symbol_table.empty ()) |
0fefef59 DE |
3808 | return 0; |
3809 | ||
2ec9a5e0 TT |
3810 | /* If there is a .dwz file, read it so we can get its CU list as |
3811 | well. */ | |
4db1a1dc TT |
3812 | dwz = dwarf2_get_dwz_file (); |
3813 | if (dwz != NULL) | |
2ec9a5e0 | 3814 | { |
2ec9a5e0 TT |
3815 | struct mapped_index dwz_map; |
3816 | const gdb_byte *dwz_types_ignore; | |
3817 | offset_type dwz_types_elements_ignore; | |
3818 | ||
3819 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3820 | 1, | |
3821 | &dwz->gdb_index, &dwz_map, | |
3822 | &dwz_list, &dwz_list_elements, | |
3823 | &dwz_types_ignore, | |
3824 | &dwz_types_elements_ignore)) | |
3825 | { | |
3826 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3827 | bfd_get_filename (dwz->dwz_bfd)); | |
3828 | return 0; | |
3829 | } | |
3830 | } | |
3831 | ||
74a0d9f6 JK |
3832 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3833 | dwz_list_elements); | |
1fd400ff | 3834 | |
8b70b953 TT |
3835 | if (types_list_elements) |
3836 | { | |
3837 | struct dwarf2_section_info *section; | |
3838 | ||
3839 | /* We can only handle a single .debug_types when we have an | |
3840 | index. */ | |
3841 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3842 | return 0; | |
3843 | ||
3844 | section = VEC_index (dwarf2_section_info_def, | |
3845 | dwarf2_per_objfile->types, 0); | |
3846 | ||
74a0d9f6 JK |
3847 | create_signatured_type_table_from_index (objfile, section, types_list, |
3848 | types_list_elements); | |
8b70b953 | 3849 | } |
9291a0cd | 3850 | |
2ec9a5e0 TT |
3851 | create_addrmap_from_index (objfile, &local_map); |
3852 | ||
8d749320 | 3853 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
3f563c84 | 3854 | map = new (map) mapped_index (); |
2ec9a5e0 | 3855 | *map = local_map; |
9291a0cd TT |
3856 | |
3857 | dwarf2_per_objfile->index_table = map; | |
3858 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3859 | dwarf2_per_objfile->quick_file_names_table = |
3860 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3861 | |
3862 | return 1; | |
3863 | } | |
3864 | ||
3865 | /* A helper for the "quick" functions which sets the global | |
3866 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3867 | |
9291a0cd TT |
3868 | static void |
3869 | dw2_setup (struct objfile *objfile) | |
3870 | { | |
9a3c8263 SM |
3871 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3872 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3873 | gdb_assert (dwarf2_per_objfile); |
3874 | } | |
3875 | ||
dee91e82 | 3876 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3877 | |
dee91e82 DE |
3878 | static void |
3879 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3880 | const gdb_byte *info_ptr, |
dee91e82 DE |
3881 | struct die_info *comp_unit_die, |
3882 | int has_children, | |
3883 | void *data) | |
9291a0cd | 3884 | { |
dee91e82 DE |
3885 | struct dwarf2_cu *cu = reader->cu; |
3886 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3887 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3888 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3889 | struct attribute *attr; |
dee91e82 | 3890 | int i; |
7b9f3c50 DE |
3891 | void **slot; |
3892 | struct quick_file_names *qfn; | |
9291a0cd | 3893 | |
0186c6a7 DE |
3894 | gdb_assert (! this_cu->is_debug_types); |
3895 | ||
07261596 TT |
3896 | /* Our callers never want to match partial units -- instead they |
3897 | will match the enclosing full CU. */ | |
3898 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3899 | { | |
3900 | this_cu->v.quick->no_file_data = 1; | |
3901 | return; | |
3902 | } | |
3903 | ||
0186c6a7 | 3904 | lh_cu = this_cu; |
7b9f3c50 | 3905 | slot = NULL; |
dee91e82 | 3906 | |
fff8551c | 3907 | line_header_up lh; |
9c541725 | 3908 | sect_offset line_offset {}; |
fff8551c | 3909 | |
dee91e82 | 3910 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3911 | if (attr) |
3912 | { | |
7b9f3c50 DE |
3913 | struct quick_file_names find_entry; |
3914 | ||
9c541725 | 3915 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3916 | |
3917 | /* We may have already read in this line header (TU line header sharing). | |
3918 | If we have we're done. */ | |
094b34ac | 3919 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3920 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3921 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3922 | &find_entry, INSERT); | |
3923 | if (*slot != NULL) | |
3924 | { | |
9a3c8263 | 3925 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3926 | return; |
7b9f3c50 DE |
3927 | } |
3928 | ||
3019eac3 | 3929 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3930 | } |
3931 | if (lh == NULL) | |
3932 | { | |
094b34ac | 3933 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3934 | return; |
9291a0cd TT |
3935 | } |
3936 | ||
8d749320 | 3937 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3938 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3939 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3940 | gdb_assert (slot != NULL); |
3941 | *slot = qfn; | |
9291a0cd | 3942 | |
d721ba37 | 3943 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3944 | |
fff8551c | 3945 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3946 | qfn->file_names = |
fff8551c PA |
3947 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3948 | for (i = 0; i < lh->file_names.size (); ++i) | |
3949 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3950 | qfn->real_names = NULL; |
9291a0cd | 3951 | |
094b34ac | 3952 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3953 | } |
3954 | ||
3955 | /* A helper for the "quick" functions which attempts to read the line | |
3956 | table for THIS_CU. */ | |
3957 | ||
3958 | static struct quick_file_names * | |
e4a48d9d | 3959 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3960 | { |
0186c6a7 DE |
3961 | /* This should never be called for TUs. */ |
3962 | gdb_assert (! this_cu->is_debug_types); | |
3963 | /* Nor type unit groups. */ | |
3964 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3965 | |
dee91e82 DE |
3966 | if (this_cu->v.quick->file_names != NULL) |
3967 | return this_cu->v.quick->file_names; | |
3968 | /* If we know there is no line data, no point in looking again. */ | |
3969 | if (this_cu->v.quick->no_file_data) | |
3970 | return NULL; | |
3971 | ||
0186c6a7 | 3972 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3973 | |
3974 | if (this_cu->v.quick->no_file_data) | |
3975 | return NULL; | |
3976 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3977 | } |
3978 | ||
3979 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3980 | real path for a given file name from the line table. */ |
2fdf6df6 | 3981 | |
9291a0cd | 3982 | static const char * |
7b9f3c50 DE |
3983 | dw2_get_real_path (struct objfile *objfile, |
3984 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3985 | { |
7b9f3c50 DE |
3986 | if (qfn->real_names == NULL) |
3987 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3988 | qfn->num_file_names, const char *); |
9291a0cd | 3989 | |
7b9f3c50 | 3990 | if (qfn->real_names[index] == NULL) |
14278e1f | 3991 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3992 | |
7b9f3c50 | 3993 | return qfn->real_names[index]; |
9291a0cd TT |
3994 | } |
3995 | ||
3996 | static struct symtab * | |
3997 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3998 | { | |
43f3e411 | 3999 | struct compunit_symtab *cust; |
9291a0cd | 4000 | int index; |
ae2de4f8 | 4001 | |
9291a0cd TT |
4002 | dw2_setup (objfile); |
4003 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
4004 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
4005 | if (cust == NULL) | |
4006 | return NULL; | |
4007 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
4008 | } |
4009 | ||
7b9f3c50 DE |
4010 | /* Traversal function for dw2_forget_cached_source_info. */ |
4011 | ||
4012 | static int | |
4013 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 4014 | { |
7b9f3c50 | 4015 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 4016 | |
7b9f3c50 | 4017 | if (file_data->real_names) |
9291a0cd | 4018 | { |
7b9f3c50 | 4019 | int i; |
9291a0cd | 4020 | |
7b9f3c50 | 4021 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 4022 | { |
7b9f3c50 DE |
4023 | xfree ((void*) file_data->real_names[i]); |
4024 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
4025 | } |
4026 | } | |
7b9f3c50 DE |
4027 | |
4028 | return 1; | |
4029 | } | |
4030 | ||
4031 | static void | |
4032 | dw2_forget_cached_source_info (struct objfile *objfile) | |
4033 | { | |
4034 | dw2_setup (objfile); | |
4035 | ||
4036 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
4037 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
4038 | } |
4039 | ||
f8eba3c6 TT |
4040 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
4041 | the symtabs and calls the iterator. */ | |
4042 | ||
4043 | static int | |
4044 | dw2_map_expand_apply (struct objfile *objfile, | |
4045 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 4046 | const char *name, const char *real_path, |
14bc53a8 | 4047 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 4048 | { |
43f3e411 | 4049 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
4050 | |
4051 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 4052 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
4053 | return 0; |
4054 | ||
4055 | /* This may expand more than one symtab, and we want to iterate over | |
4056 | all of them. */ | |
a0f42c21 | 4057 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 4058 | |
14bc53a8 PA |
4059 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
4060 | last_made, callback); | |
f8eba3c6 TT |
4061 | } |
4062 | ||
4063 | /* Implementation of the map_symtabs_matching_filename method. */ | |
4064 | ||
14bc53a8 PA |
4065 | static bool |
4066 | dw2_map_symtabs_matching_filename | |
4067 | (struct objfile *objfile, const char *name, const char *real_path, | |
4068 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
4069 | { |
4070 | int i; | |
c011a4f4 | 4071 | const char *name_basename = lbasename (name); |
9291a0cd TT |
4072 | |
4073 | dw2_setup (objfile); | |
ae2de4f8 | 4074 | |
848e3e78 DE |
4075 | /* The rule is CUs specify all the files, including those used by |
4076 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 4077 | |
848e3e78 | 4078 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
4079 | { |
4080 | int j; | |
8832e7e3 | 4081 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 4082 | struct quick_file_names *file_data; |
9291a0cd | 4083 | |
3d7bb9d9 | 4084 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4085 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4086 | continue; |
4087 | ||
e4a48d9d | 4088 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4089 | if (file_data == NULL) |
9291a0cd TT |
4090 | continue; |
4091 | ||
7b9f3c50 | 4092 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4093 | { |
7b9f3c50 | 4094 | const char *this_name = file_data->file_names[j]; |
da235a7c | 4095 | const char *this_real_name; |
9291a0cd | 4096 | |
af529f8f | 4097 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 4098 | { |
f5b95b50 | 4099 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
4100 | callback)) |
4101 | return true; | |
288e77a7 | 4102 | continue; |
4aac40c8 | 4103 | } |
9291a0cd | 4104 | |
c011a4f4 DE |
4105 | /* Before we invoke realpath, which can get expensive when many |
4106 | files are involved, do a quick comparison of the basenames. */ | |
4107 | if (! basenames_may_differ | |
4108 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
4109 | continue; | |
4110 | ||
da235a7c JK |
4111 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
4112 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 4113 | { |
da235a7c | 4114 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
4115 | callback)) |
4116 | return true; | |
288e77a7 | 4117 | continue; |
da235a7c | 4118 | } |
9291a0cd | 4119 | |
da235a7c JK |
4120 | if (real_path != NULL) |
4121 | { | |
af529f8f JK |
4122 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
4123 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 4124 | if (this_real_name != NULL |
af529f8f | 4125 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 4126 | { |
f5b95b50 | 4127 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
4128 | callback)) |
4129 | return true; | |
288e77a7 | 4130 | continue; |
9291a0cd TT |
4131 | } |
4132 | } | |
4133 | } | |
4134 | } | |
4135 | ||
14bc53a8 | 4136 | return false; |
9291a0cd TT |
4137 | } |
4138 | ||
da51c347 DE |
4139 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
4140 | ||
4141 | struct dw2_symtab_iterator | |
9291a0cd | 4142 | { |
da51c347 DE |
4143 | /* The internalized form of .gdb_index. */ |
4144 | struct mapped_index *index; | |
4145 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
4146 | int want_specific_block; | |
4147 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
4148 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
4149 | int block_index; | |
4150 | /* The kind of symbol we're looking for. */ | |
4151 | domain_enum domain; | |
4152 | /* The list of CUs from the index entry of the symbol, | |
4153 | or NULL if not found. */ | |
4154 | offset_type *vec; | |
4155 | /* The next element in VEC to look at. */ | |
4156 | int next; | |
4157 | /* The number of elements in VEC, or zero if there is no match. */ | |
4158 | int length; | |
8943b874 DE |
4159 | /* Have we seen a global version of the symbol? |
4160 | If so we can ignore all further global instances. | |
4161 | This is to work around gold/15646, inefficient gold-generated | |
4162 | indices. */ | |
4163 | int global_seen; | |
da51c347 | 4164 | }; |
9291a0cd | 4165 | |
da51c347 DE |
4166 | /* Initialize the index symtab iterator ITER. |
4167 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
4168 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 4169 | |
9291a0cd | 4170 | static void |
da51c347 DE |
4171 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
4172 | struct mapped_index *index, | |
4173 | int want_specific_block, | |
4174 | int block_index, | |
4175 | domain_enum domain, | |
4176 | const char *name) | |
4177 | { | |
4178 | iter->index = index; | |
4179 | iter->want_specific_block = want_specific_block; | |
4180 | iter->block_index = block_index; | |
4181 | iter->domain = domain; | |
4182 | iter->next = 0; | |
8943b874 | 4183 | iter->global_seen = 0; |
da51c347 DE |
4184 | |
4185 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
4186 | iter->length = MAYBE_SWAP (*iter->vec); | |
4187 | else | |
4188 | { | |
4189 | iter->vec = NULL; | |
4190 | iter->length = 0; | |
4191 | } | |
4192 | } | |
4193 | ||
4194 | /* Return the next matching CU or NULL if there are no more. */ | |
4195 | ||
4196 | static struct dwarf2_per_cu_data * | |
4197 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
4198 | { | |
4199 | for ( ; iter->next < iter->length; ++iter->next) | |
4200 | { | |
4201 | offset_type cu_index_and_attrs = | |
4202 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
4203 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 4204 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
4205 | int want_static = iter->block_index != GLOBAL_BLOCK; |
4206 | /* This value is only valid for index versions >= 7. */ | |
4207 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4208 | gdb_index_symbol_kind symbol_kind = | |
4209 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4210 | /* Only check the symbol attributes if they're present. | |
4211 | Indices prior to version 7 don't record them, | |
4212 | and indices >= 7 may elide them for certain symbols | |
4213 | (gold does this). */ | |
4214 | int attrs_valid = | |
4215 | (iter->index->version >= 7 | |
4216 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4217 | ||
3190f0c6 DE |
4218 | /* Don't crash on bad data. */ |
4219 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4220 | + dwarf2_per_objfile->n_type_units)) | |
4221 | { | |
4222 | complaint (&symfile_complaints, | |
4223 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
4224 | " [in module %s]"), |
4225 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
4226 | continue; |
4227 | } | |
4228 | ||
8832e7e3 | 4229 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 4230 | |
da51c347 | 4231 | /* Skip if already read in. */ |
43f3e411 | 4232 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
4233 | continue; |
4234 | ||
8943b874 DE |
4235 | /* Check static vs global. */ |
4236 | if (attrs_valid) | |
4237 | { | |
4238 | if (iter->want_specific_block | |
4239 | && want_static != is_static) | |
4240 | continue; | |
4241 | /* Work around gold/15646. */ | |
4242 | if (!is_static && iter->global_seen) | |
4243 | continue; | |
4244 | if (!is_static) | |
4245 | iter->global_seen = 1; | |
4246 | } | |
da51c347 DE |
4247 | |
4248 | /* Only check the symbol's kind if it has one. */ | |
4249 | if (attrs_valid) | |
4250 | { | |
4251 | switch (iter->domain) | |
4252 | { | |
4253 | case VAR_DOMAIN: | |
4254 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
4255 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
4256 | /* Some types are also in VAR_DOMAIN. */ | |
4257 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4258 | continue; | |
4259 | break; | |
4260 | case STRUCT_DOMAIN: | |
4261 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4262 | continue; | |
4263 | break; | |
4264 | case LABEL_DOMAIN: | |
4265 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4266 | continue; | |
4267 | break; | |
4268 | default: | |
4269 | break; | |
4270 | } | |
4271 | } | |
4272 | ||
4273 | ++iter->next; | |
4274 | return per_cu; | |
4275 | } | |
4276 | ||
4277 | return NULL; | |
4278 | } | |
4279 | ||
43f3e411 | 4280 | static struct compunit_symtab * |
da51c347 DE |
4281 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
4282 | const char *name, domain_enum domain) | |
9291a0cd | 4283 | { |
43f3e411 | 4284 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
4285 | struct mapped_index *index; |
4286 | ||
9291a0cd TT |
4287 | dw2_setup (objfile); |
4288 | ||
b5ec771e PA |
4289 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
4290 | ||
156942c7 DE |
4291 | index = dwarf2_per_objfile->index_table; |
4292 | ||
da51c347 | 4293 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 4294 | if (index) |
9291a0cd | 4295 | { |
da51c347 DE |
4296 | struct dw2_symtab_iterator iter; |
4297 | struct dwarf2_per_cu_data *per_cu; | |
4298 | ||
4299 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 4300 | |
da51c347 | 4301 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 4302 | { |
b2e2f908 | 4303 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
4304 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
4305 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 4306 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 4307 | |
b2e2f908 DE |
4308 | sym = block_find_symbol (block, name, domain, |
4309 | block_find_non_opaque_type_preferred, | |
4310 | &with_opaque); | |
4311 | ||
da51c347 DE |
4312 | /* Some caution must be observed with overloaded functions |
4313 | and methods, since the index will not contain any overload | |
4314 | information (but NAME might contain it). */ | |
da51c347 | 4315 | |
b2e2f908 | 4316 | if (sym != NULL |
b5ec771e | 4317 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
b2e2f908 DE |
4318 | return stab; |
4319 | if (with_opaque != NULL | |
b5ec771e | 4320 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
b2e2f908 | 4321 | stab_best = stab; |
da51c347 DE |
4322 | |
4323 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
4324 | } |
4325 | } | |
9291a0cd | 4326 | |
da51c347 | 4327 | return stab_best; |
9291a0cd TT |
4328 | } |
4329 | ||
4330 | static void | |
4331 | dw2_print_stats (struct objfile *objfile) | |
4332 | { | |
e4a48d9d | 4333 | int i, total, count; |
9291a0cd TT |
4334 | |
4335 | dw2_setup (objfile); | |
e4a48d9d | 4336 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 4337 | count = 0; |
e4a48d9d | 4338 | for (i = 0; i < total; ++i) |
9291a0cd | 4339 | { |
8832e7e3 | 4340 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4341 | |
43f3e411 | 4342 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4343 | ++count; |
4344 | } | |
e4a48d9d | 4345 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
4346 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
4347 | } | |
4348 | ||
779bd270 DE |
4349 | /* This dumps minimal information about the index. |
4350 | It is called via "mt print objfiles". | |
4351 | One use is to verify .gdb_index has been loaded by the | |
4352 | gdb.dwarf2/gdb-index.exp testcase. */ | |
4353 | ||
9291a0cd TT |
4354 | static void |
4355 | dw2_dump (struct objfile *objfile) | |
4356 | { | |
779bd270 DE |
4357 | dw2_setup (objfile); |
4358 | gdb_assert (dwarf2_per_objfile->using_index); | |
4359 | printf_filtered (".gdb_index:"); | |
4360 | if (dwarf2_per_objfile->index_table != NULL) | |
4361 | { | |
4362 | printf_filtered (" version %d\n", | |
4363 | dwarf2_per_objfile->index_table->version); | |
4364 | } | |
4365 | else | |
4366 | printf_filtered (" faked for \"readnow\"\n"); | |
4367 | printf_filtered ("\n"); | |
9291a0cd TT |
4368 | } |
4369 | ||
4370 | static void | |
3189cb12 DE |
4371 | dw2_relocate (struct objfile *objfile, |
4372 | const struct section_offsets *new_offsets, | |
4373 | const struct section_offsets *delta) | |
9291a0cd TT |
4374 | { |
4375 | /* There's nothing to relocate here. */ | |
4376 | } | |
4377 | ||
4378 | static void | |
4379 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4380 | const char *func_name) | |
4381 | { | |
da51c347 DE |
4382 | struct mapped_index *index; |
4383 | ||
4384 | dw2_setup (objfile); | |
4385 | ||
4386 | index = dwarf2_per_objfile->index_table; | |
4387 | ||
4388 | /* index is NULL if OBJF_READNOW. */ | |
4389 | if (index) | |
4390 | { | |
4391 | struct dw2_symtab_iterator iter; | |
4392 | struct dwarf2_per_cu_data *per_cu; | |
4393 | ||
4394 | /* Note: It doesn't matter what we pass for block_index here. */ | |
4395 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
4396 | func_name); | |
4397 | ||
4398 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
4399 | dw2_instantiate_symtab (per_cu); | |
4400 | } | |
9291a0cd TT |
4401 | } |
4402 | ||
4403 | static void | |
4404 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4405 | { | |
4406 | int i; | |
4407 | ||
4408 | dw2_setup (objfile); | |
1fd400ff TT |
4409 | |
4410 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4411 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4412 | { |
8832e7e3 | 4413 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4414 | |
a0f42c21 | 4415 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4416 | } |
4417 | } | |
4418 | ||
4419 | static void | |
652a8996 JK |
4420 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4421 | const char *fullname) | |
9291a0cd TT |
4422 | { |
4423 | int i; | |
4424 | ||
4425 | dw2_setup (objfile); | |
d4637a04 DE |
4426 | |
4427 | /* We don't need to consider type units here. | |
4428 | This is only called for examining code, e.g. expand_line_sal. | |
4429 | There can be an order of magnitude (or more) more type units | |
4430 | than comp units, and we avoid them if we can. */ | |
4431 | ||
4432 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4433 | { |
4434 | int j; | |
8832e7e3 | 4435 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4436 | struct quick_file_names *file_data; |
9291a0cd | 4437 | |
3d7bb9d9 | 4438 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4439 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4440 | continue; |
4441 | ||
e4a48d9d | 4442 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4443 | if (file_data == NULL) |
9291a0cd TT |
4444 | continue; |
4445 | ||
7b9f3c50 | 4446 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4447 | { |
652a8996 JK |
4448 | const char *this_fullname = file_data->file_names[j]; |
4449 | ||
4450 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4451 | { |
a0f42c21 | 4452 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4453 | break; |
4454 | } | |
4455 | } | |
4456 | } | |
4457 | } | |
4458 | ||
9291a0cd | 4459 | static void |
ade7ed9e | 4460 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4461 | const char * name, domain_enum domain, |
ade7ed9e | 4462 | int global, |
40658b94 PH |
4463 | int (*callback) (struct block *, |
4464 | struct symbol *, void *), | |
b5ec771e | 4465 | void *data, symbol_name_match_type match, |
2edb89d3 | 4466 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4467 | { |
40658b94 | 4468 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4469 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4470 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4471 | } |
4472 | ||
b5ec771e PA |
4473 | /* Symbol name matcher for .gdb_index names. |
4474 | ||
4475 | Symbol names in .gdb_index have a few particularities: | |
4476 | ||
4477 | - There's no indication of which is the language of each symbol. | |
4478 | ||
4479 | Since each language has its own symbol name matching algorithm, | |
4480 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4481 | each symbol against all languages. This would be a potential |
4482 | performance problem if it were not mitigated by the | |
4483 | mapped_index::name_components lookup table, which significantly | |
4484 | reduces the number of times we need to call into this matcher, | |
4485 | making it a non-issue. | |
b5ec771e PA |
4486 | |
4487 | - Symbol names in the index have no overload (parameter) | |
4488 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4489 | appear as "foo" in the index, for example. | |
4490 | ||
4491 | This means that the lookup names passed to the symbol name | |
4492 | matcher functions must have no parameter information either | |
4493 | because (e.g.) symbol search name "foo" does not match | |
4494 | lookup-name "foo(int)" [while swapping search name for lookup | |
4495 | name would match]. | |
4496 | */ | |
4497 | class gdb_index_symbol_name_matcher | |
4498 | { | |
4499 | public: | |
4500 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4501 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4502 | ||
4503 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4504 | Returns true if any matcher matches. */ | |
4505 | bool matches (const char *symbol_name); | |
4506 | ||
4507 | private: | |
4508 | /* A reference to the lookup name we're matching against. */ | |
4509 | const lookup_name_info &m_lookup_name; | |
4510 | ||
4511 | /* A vector holding all the different symbol name matchers, for all | |
4512 | languages. */ | |
4513 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4514 | }; | |
4515 | ||
4516 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4517 | (const lookup_name_info &lookup_name) | |
4518 | : m_lookup_name (lookup_name) | |
4519 | { | |
4520 | /* Prepare the vector of comparison functions upfront, to avoid | |
4521 | doing the same work for each symbol. Care is taken to avoid | |
4522 | matching with the same matcher more than once if/when multiple | |
4523 | languages use the same matcher function. */ | |
4524 | auto &matchers = m_symbol_name_matcher_funcs; | |
4525 | matchers.reserve (nr_languages); | |
4526 | ||
4527 | matchers.push_back (default_symbol_name_matcher); | |
4528 | ||
4529 | for (int i = 0; i < nr_languages; i++) | |
4530 | { | |
4531 | const language_defn *lang = language_def ((enum language) i); | |
4532 | if (lang->la_get_symbol_name_matcher != NULL) | |
4533 | { | |
4534 | symbol_name_matcher_ftype *name_matcher | |
4535 | = lang->la_get_symbol_name_matcher (m_lookup_name); | |
4536 | ||
4537 | /* Don't insert the same comparison routine more than once. | |
4538 | Note that we do this linear walk instead of a cheaper | |
4539 | sorted insert, or use a std::set or something like that, | |
4540 | because relative order of function addresses is not | |
4541 | stable. This is not a problem in practice because the | |
4542 | number of supported languages is low, and the cost here | |
4543 | is tiny compared to the number of searches we'll do | |
4544 | afterwards using this object. */ | |
4545 | if (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4546 | == matchers.end ()) | |
4547 | matchers.push_back (name_matcher); | |
4548 | } | |
4549 | } | |
4550 | } | |
4551 | ||
4552 | bool | |
4553 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4554 | { | |
4555 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4556 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4557 | return true; | |
4558 | ||
4559 | return false; | |
4560 | } | |
4561 | ||
e1ef7d7a PA |
4562 | /* Starting from a search name, return the string that finds the upper |
4563 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4564 | list. Returns the empty string to indicate that the upper bound is | |
4565 | the end of the list. */ | |
4566 | ||
4567 | static std::string | |
4568 | make_sort_after_prefix_name (const char *search_name) | |
4569 | { | |
4570 | /* When looking to complete "func", we find the upper bound of all | |
4571 | symbols that start with "func" by looking for where we'd insert | |
4572 | the closest string that would follow "func" in lexicographical | |
4573 | order. Usually, that's "func"-with-last-character-incremented, | |
4574 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4575 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4576 | Especially mind the 0xff character, which is a valid character in | |
4577 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4578 | rule out compilers allowing it in identifiers. Note that | |
4579 | conveniently, strcmp/strcasecmp are specified to compare | |
4580 | characters interpreted as unsigned char. So what we do is treat | |
4581 | the whole string as a base 256 number composed of a sequence of | |
4582 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4583 | to 0, and carries 1 to the following more-significant position. | |
4584 | If the very first character in SEARCH_NAME ends up incremented | |
4585 | and carries/overflows, then the upper bound is the end of the | |
4586 | list. The string after the empty string is also the empty | |
4587 | string. | |
4588 | ||
4589 | Some examples of this operation: | |
4590 | ||
4591 | SEARCH_NAME => "+1" RESULT | |
4592 | ||
4593 | "abc" => "abd" | |
4594 | "ab\xff" => "ac" | |
4595 | "\xff" "a" "\xff" => "\xff" "b" | |
4596 | "\xff" => "" | |
4597 | "\xff\xff" => "" | |
4598 | "" => "" | |
4599 | ||
4600 | Then, with these symbols for example: | |
4601 | ||
4602 | func | |
4603 | func1 | |
4604 | fund | |
4605 | ||
4606 | completing "func" looks for symbols between "func" and | |
4607 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4608 | which finds "func" and "func1", but not "fund". | |
4609 | ||
4610 | And with: | |
4611 | ||
4612 | funcÿ (Latin1 'ÿ' [0xff]) | |
4613 | funcÿ1 | |
4614 | fund | |
4615 | ||
4616 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4617 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4618 | ||
4619 | And with: | |
4620 | ||
4621 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4622 | ÿÿ1 | |
4623 | ||
4624 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4625 | the end of the list. | |
4626 | */ | |
4627 | std::string after = search_name; | |
4628 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4629 | after.pop_back (); | |
4630 | if (!after.empty ()) | |
4631 | after.back () = (unsigned char) after.back () + 1; | |
4632 | return after; | |
4633 | } | |
4634 | ||
5c58de74 | 4635 | /* See declaration. */ |
61d96d7e | 4636 | |
5c58de74 PA |
4637 | std::pair<std::vector<name_component>::const_iterator, |
4638 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 4639 | mapped_index_base::find_name_components_bounds |
5c58de74 | 4640 | (const lookup_name_info &lookup_name_without_params) const |
3f563c84 | 4641 | { |
5c58de74 PA |
4642 | auto *name_cmp |
4643 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 PA |
4644 | |
4645 | const char *cplus | |
c62446b1 | 4646 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4647 | |
3f563c84 PA |
4648 | /* Comparison function object for lower_bound that matches against a |
4649 | given symbol name. */ | |
4650 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4651 | const char *name) | |
4652 | { | |
5c58de74 | 4653 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4654 | const char *elem_name = elem_qualified + elem.name_offset; |
4655 | return name_cmp (elem_name, name) < 0; | |
4656 | }; | |
4657 | ||
4658 | /* Comparison function object for upper_bound that matches against a | |
4659 | given symbol name. */ | |
4660 | auto lookup_compare_upper = [&] (const char *name, | |
4661 | const name_component &elem) | |
4662 | { | |
5c58de74 | 4663 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4664 | const char *elem_name = elem_qualified + elem.name_offset; |
4665 | return name_cmp (name, elem_name) < 0; | |
4666 | }; | |
4667 | ||
5c58de74 PA |
4668 | auto begin = this->name_components.begin (); |
4669 | auto end = this->name_components.end (); | |
3f563c84 PA |
4670 | |
4671 | /* Find the lower bound. */ | |
4672 | auto lower = [&] () | |
4673 | { | |
5c58de74 | 4674 | if (lookup_name_without_params.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4675 | return begin; |
4676 | else | |
4677 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4678 | } (); | |
4679 | ||
4680 | /* Find the upper bound. */ | |
4681 | auto upper = [&] () | |
4682 | { | |
5c58de74 | 4683 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4684 | { |
e1ef7d7a PA |
4685 | /* In completion mode, we want UPPER to point past all |
4686 | symbols names that have the same prefix. I.e., with | |
4687 | these symbols, and completing "func": | |
4688 | ||
4689 | function << lower bound | |
4690 | function1 | |
4691 | other_function << upper bound | |
4692 | ||
4693 | We find the upper bound by looking for the insertion | |
4694 | point of "func"-with-last-character-incremented, | |
4695 | i.e. "fund". */ | |
4696 | std::string after = make_sort_after_prefix_name (cplus); | |
4697 | if (after.empty ()) | |
3f563c84 | 4698 | return end; |
e6b2f5ef PA |
4699 | return std::lower_bound (lower, end, after.c_str (), |
4700 | lookup_compare_lower); | |
3f563c84 PA |
4701 | } |
4702 | else | |
4703 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4704 | } (); | |
4705 | ||
5c58de74 PA |
4706 | return {lower, upper}; |
4707 | } | |
4708 | ||
4709 | /* See declaration. */ | |
4710 | ||
4711 | void | |
44ed8f3e | 4712 | mapped_index_base::build_name_components () |
5c58de74 PA |
4713 | { |
4714 | if (!this->name_components.empty ()) | |
4715 | return; | |
4716 | ||
4717 | this->name_components_casing = case_sensitivity; | |
4718 | auto *name_cmp | |
4719 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4720 | ||
4721 | /* The code below only knows how to break apart components of C++ | |
4722 | symbol names (and other languages that use '::' as | |
4723 | namespace/module separator). If we add support for wild matching | |
4724 | to some language that uses some other operator (E.g., Ada, Go and | |
4725 | D use '.'), then we'll need to try splitting the symbol name | |
4726 | according to that language too. Note that Ada does support wild | |
4727 | matching, but doesn't currently support .gdb_index. */ | |
44ed8f3e PA |
4728 | auto count = this->symbol_name_count (); |
4729 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 4730 | { |
44ed8f3e | 4731 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
4732 | continue; |
4733 | ||
4734 | const char *name = this->symbol_name_at (idx); | |
4735 | ||
4736 | /* Add each name component to the name component table. */ | |
4737 | unsigned int previous_len = 0; | |
4738 | for (unsigned int current_len = cp_find_first_component (name); | |
4739 | name[current_len] != '\0'; | |
4740 | current_len += cp_find_first_component (name + current_len)) | |
4741 | { | |
4742 | gdb_assert (name[current_len] == ':'); | |
4743 | this->name_components.push_back ({previous_len, idx}); | |
4744 | /* Skip the '::'. */ | |
4745 | current_len += 2; | |
4746 | previous_len = current_len; | |
4747 | } | |
4748 | this->name_components.push_back ({previous_len, idx}); | |
4749 | } | |
4750 | ||
4751 | /* Sort name_components elements by name. */ | |
4752 | auto name_comp_compare = [&] (const name_component &left, | |
4753 | const name_component &right) | |
4754 | { | |
4755 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4756 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4757 | ||
4758 | const char *left_name = left_qualified + left.name_offset; | |
4759 | const char *right_name = right_qualified + right.name_offset; | |
4760 | ||
4761 | return name_cmp (left_name, right_name) < 0; | |
4762 | }; | |
4763 | ||
4764 | std::sort (this->name_components.begin (), | |
4765 | this->name_components.end (), | |
4766 | name_comp_compare); | |
4767 | } | |
4768 | ||
4769 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
4770 | mapped_index_base instead of the containing objfile. This is split |
4771 | to a separate function in order to be able to unit test the | |
4772 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 4773 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 4774 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
4775 | |
4776 | static void | |
4777 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 4778 | (mapped_index_base &index, |
5c58de74 PA |
4779 | const lookup_name_info &lookup_name_in, |
4780 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4781 | enum search_domain kind, | |
4782 | gdb::function_view<void (offset_type)> match_callback) | |
4783 | { | |
4784 | lookup_name_info lookup_name_without_params | |
4785 | = lookup_name_in.make_ignore_params (); | |
4786 | gdb_index_symbol_name_matcher lookup_name_matcher | |
4787 | (lookup_name_without_params); | |
4788 | ||
4789 | /* Build the symbol name component sorted vector, if we haven't | |
4790 | yet. */ | |
4791 | index.build_name_components (); | |
4792 | ||
4793 | auto bounds = index.find_name_components_bounds (lookup_name_without_params); | |
4794 | ||
3f563c84 PA |
4795 | /* Now for each symbol name in range, check to see if we have a name |
4796 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4797 | ||
4798 | /* The same symbol may appear more than once in the range though. | |
4799 | E.g., if we're looking for symbols that complete "w", and we have | |
4800 | a symbol named "w1::w2", we'll find the two name components for | |
4801 | that same symbol in the range. To be sure we only call the | |
4802 | callback once per symbol, we first collect the symbol name | |
4803 | indexes that matched in a temporary vector and ignore | |
4804 | duplicates. */ | |
4805 | std::vector<offset_type> matches; | |
5c58de74 | 4806 | matches.reserve (std::distance (bounds.first, bounds.second)); |
3f563c84 | 4807 | |
5c58de74 | 4808 | for (; bounds.first != bounds.second; ++bounds.first) |
3f563c84 | 4809 | { |
5c58de74 | 4810 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
3f563c84 PA |
4811 | |
4812 | if (!lookup_name_matcher.matches (qualified) | |
4813 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4814 | continue; |
4815 | ||
5c58de74 | 4816 | matches.push_back (bounds.first->idx); |
3f563c84 PA |
4817 | } |
4818 | ||
4819 | std::sort (matches.begin (), matches.end ()); | |
4820 | ||
4821 | /* Finally call the callback, once per match. */ | |
4822 | ULONGEST prev = -1; | |
4823 | for (offset_type idx : matches) | |
4824 | { | |
4825 | if (prev != idx) | |
4826 | { | |
4827 | match_callback (idx); | |
4828 | prev = idx; | |
4829 | } | |
4830 | } | |
4831 | ||
4832 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4833 | (offset_type)-1 are both possible values. */ | |
4834 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4835 | } | |
4836 | ||
c62446b1 PA |
4837 | #if GDB_SELF_TEST |
4838 | ||
4839 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4840 | ||
a3c5fafd PA |
4841 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4842 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4843 | mapped_index_base interface. Builds an index from the symbol list | |
4844 | passed as parameter to the constructor. */ | |
4845 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4846 | { |
4847 | public: | |
a3c5fafd PA |
4848 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4849 | : m_symbol_table (symbols) | |
c62446b1 PA |
4850 | {} |
4851 | ||
a3c5fafd | 4852 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4853 | |
a3c5fafd PA |
4854 | /* Return the number of names in the symbol table. */ |
4855 | virtual size_t symbol_name_count () const | |
c62446b1 | 4856 | { |
a3c5fafd | 4857 | return m_symbol_table.size (); |
c62446b1 PA |
4858 | } |
4859 | ||
a3c5fafd PA |
4860 | /* Get the name of the symbol at IDX in the symbol table. */ |
4861 | virtual const char *symbol_name_at (offset_type idx) const | |
4862 | { | |
4863 | return m_symbol_table[idx]; | |
4864 | } | |
c62446b1 | 4865 | |
a3c5fafd PA |
4866 | private: |
4867 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4868 | }; |
4869 | ||
4870 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4871 | string, to pass to print routines. */ | |
4872 | ||
4873 | static const char * | |
4874 | string_or_null (const char *str) | |
4875 | { | |
4876 | return str != NULL ? str : "<null>"; | |
4877 | } | |
4878 | ||
4879 | /* Check if a lookup_name_info built from | |
4880 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4881 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4882 | matching order. If no match expected, then an empty list is | |
4883 | specified. Returns true on success. On failure prints a warning | |
4884 | indicating the file:line that failed, and returns false. */ | |
4885 | ||
4886 | static bool | |
4887 | check_match (const char *file, int line, | |
4888 | mock_mapped_index &mock_index, | |
4889 | const char *name, symbol_name_match_type match_type, | |
4890 | bool completion_mode, | |
4891 | std::initializer_list<const char *> expected_list) | |
4892 | { | |
4893 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4894 | ||
4895 | bool matched = true; | |
4896 | ||
4897 | auto mismatch = [&] (const char *expected_str, | |
4898 | const char *got) | |
4899 | { | |
4900 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4901 | "expected=\"%s\", got=\"%s\"\n"), | |
4902 | file, line, | |
4903 | (match_type == symbol_name_match_type::FULL | |
4904 | ? "FULL" : "WILD"), | |
4905 | name, string_or_null (expected_str), string_or_null (got)); | |
4906 | matched = false; | |
4907 | }; | |
4908 | ||
4909 | auto expected_it = expected_list.begin (); | |
4910 | auto expected_end = expected_list.end (); | |
4911 | ||
a3c5fafd | 4912 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4913 | NULL, ALL_DOMAIN, |
4914 | [&] (offset_type idx) | |
4915 | { | |
a3c5fafd | 4916 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4917 | const char *expected_str |
4918 | = expected_it == expected_end ? NULL : *expected_it++; | |
4919 | ||
4920 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4921 | mismatch (expected_str, matched_name); | |
4922 | }); | |
4923 | ||
4924 | const char *expected_str | |
4925 | = expected_it == expected_end ? NULL : *expected_it++; | |
4926 | if (expected_str != NULL) | |
4927 | mismatch (expected_str, NULL); | |
4928 | ||
4929 | return matched; | |
4930 | } | |
4931 | ||
4932 | /* The symbols added to the mock mapped_index for testing (in | |
4933 | canonical form). */ | |
4934 | static const char *test_symbols[] = { | |
4935 | "function", | |
4936 | "std::bar", | |
4937 | "std::zfunction", | |
4938 | "std::zfunction2", | |
4939 | "w1::w2", | |
4940 | "ns::foo<char*>", | |
4941 | "ns::foo<int>", | |
4942 | "ns::foo<long>", | |
a20714ff PA |
4943 | "ns2::tmpl<int>::foo2", |
4944 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4945 | |
e1ef7d7a PA |
4946 | /* These are used to check that the increment-last-char in the |
4947 | matching algorithm for completion doesn't match "t1_fund" when | |
4948 | completing "t1_func". */ | |
4949 | "t1_func", | |
4950 | "t1_func1", | |
4951 | "t1_fund", | |
4952 | "t1_fund1", | |
4953 | ||
4954 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4955 | cp-name-parser understands this as a single identifier ("função" | |
4956 | is "function" in PT). */ | |
4957 | u8"u8função", | |
4958 | ||
4959 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4960 | "yfunc\377", | |
4961 | ||
4962 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4963 | "\377", | |
4964 | "\377\377123", | |
4965 | ||
c62446b1 PA |
4966 | /* A name with all sorts of complications. Starts with "z" to make |
4967 | it easier for the completion tests below. */ | |
4968 | #define Z_SYM_NAME \ | |
4969 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4970 | "::tuple<(anonymous namespace)::ui*, " \ | |
4971 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4972 | ||
4973 | Z_SYM_NAME | |
4974 | }; | |
4975 | ||
a3c5fafd PA |
4976 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4977 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4978 | in completion mode. */ | |
5c58de74 PA |
4979 | |
4980 | static bool | |
a3c5fafd | 4981 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4982 | const char *search_name, |
4983 | gdb::array_view<const char *> expected_syms) | |
4984 | { | |
4985 | lookup_name_info lookup_name (search_name, | |
4986 | symbol_name_match_type::FULL, true); | |
4987 | ||
4988 | auto bounds = index.find_name_components_bounds (lookup_name); | |
4989 | ||
4990 | size_t distance = std::distance (bounds.first, bounds.second); | |
4991 | if (distance != expected_syms.size ()) | |
4992 | return false; | |
4993 | ||
4994 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4995 | { | |
4996 | auto nc_elem = bounds.first + exp_elem; | |
4997 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4998 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4999 | return false; | |
5000 | } | |
5001 | ||
5002 | return true; | |
5003 | } | |
5004 | ||
5005 | /* Test the lower-level mapped_index::find_name_component_bounds | |
5006 | method. */ | |
5007 | ||
c62446b1 | 5008 | static void |
5c58de74 PA |
5009 | test_mapped_index_find_name_component_bounds () |
5010 | { | |
5011 | mock_mapped_index mock_index (test_symbols); | |
5012 | ||
a3c5fafd | 5013 | mock_index.build_name_components (); |
5c58de74 PA |
5014 | |
5015 | /* Test the lower-level mapped_index::find_name_component_bounds | |
5016 | method in completion mode. */ | |
5017 | { | |
5018 | static const char *expected_syms[] = { | |
5019 | "t1_func", | |
5020 | "t1_func1", | |
5c58de74 PA |
5021 | }; |
5022 | ||
a3c5fafd | 5023 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
5024 | "t1_func", expected_syms)); |
5025 | } | |
5026 | ||
5027 | /* Check that the increment-last-char in the name matching algorithm | |
5028 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
5029 | { | |
5030 | static const char *expected_syms1[] = { | |
5031 | "\377", | |
5032 | "\377\377123", | |
5033 | }; | |
a3c5fafd | 5034 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
5035 | "\377", expected_syms1)); |
5036 | ||
5037 | static const char *expected_syms2[] = { | |
5038 | "\377\377123", | |
5039 | }; | |
a3c5fafd | 5040 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
5041 | "\377\377", expected_syms2)); |
5042 | } | |
5043 | } | |
5044 | ||
5045 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
5046 | ||
5047 | static void | |
5048 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
5049 | { |
5050 | mock_mapped_index mock_index (test_symbols); | |
5051 | ||
5052 | /* We let all tests run until the end even if some fails, for debug | |
5053 | convenience. */ | |
5054 | bool any_mismatch = false; | |
5055 | ||
5056 | /* Create the expected symbols list (an initializer_list). Needed | |
5057 | because lists have commas, and we need to pass them to CHECK, | |
5058 | which is a macro. */ | |
5059 | #define EXPECT(...) { __VA_ARGS__ } | |
5060 | ||
5061 | /* Wrapper for check_match that passes down the current | |
5062 | __FILE__/__LINE__. */ | |
5063 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
5064 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
5065 | mock_index, \ | |
5066 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
5067 | EXPECTED_LIST) | |
5068 | ||
5069 | /* Identity checks. */ | |
5070 | for (const char *sym : test_symbols) | |
5071 | { | |
5072 | /* Should be able to match all existing symbols. */ | |
5073 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
5074 | EXPECT (sym)); | |
5075 | ||
5076 | /* Should be able to match all existing symbols with | |
5077 | parameters. */ | |
5078 | std::string with_params = std::string (sym) + "(int)"; | |
5079 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
5080 | EXPECT (sym)); | |
5081 | ||
5082 | /* Should be able to match all existing symbols with | |
5083 | parameters and qualifiers. */ | |
5084 | with_params = std::string (sym) + " ( int ) const"; | |
5085 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
5086 | EXPECT (sym)); | |
5087 | ||
5088 | /* This should really find sym, but cp-name-parser.y doesn't | |
5089 | know about lvalue/rvalue qualifiers yet. */ | |
5090 | with_params = std::string (sym) + " ( int ) &&"; | |
5091 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
5092 | {}); | |
5093 | } | |
5094 | ||
e1ef7d7a PA |
5095 | /* Check that the name matching algorithm for completion doesn't get |
5096 | confused with Latin1 'ÿ' / 0xff. */ | |
5097 | { | |
5098 | static const char str[] = "\377"; | |
5099 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
5100 | EXPECT ("\377", "\377\377123")); | |
5101 | } | |
5102 | ||
5103 | /* Check that the increment-last-char in the matching algorithm for | |
5104 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
5105 | { | |
5106 | static const char str[] = "t1_func"; | |
5107 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
5108 | EXPECT ("t1_func", "t1_func1")); | |
5109 | } | |
5110 | ||
c62446b1 PA |
5111 | /* Check that completion mode works at each prefix of the expected |
5112 | symbol name. */ | |
5113 | { | |
5114 | static const char str[] = "function(int)"; | |
5115 | size_t len = strlen (str); | |
5116 | std::string lookup; | |
5117 | ||
5118 | for (size_t i = 1; i < len; i++) | |
5119 | { | |
5120 | lookup.assign (str, i); | |
5121 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
5122 | EXPECT ("function")); | |
5123 | } | |
5124 | } | |
5125 | ||
5126 | /* While "w" is a prefix of both components, the match function | |
5127 | should still only be called once. */ | |
5128 | { | |
5129 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
5130 | EXPECT ("w1::w2")); | |
a20714ff PA |
5131 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
5132 | EXPECT ("w1::w2")); | |
c62446b1 PA |
5133 | } |
5134 | ||
5135 | /* Same, with a "complicated" symbol. */ | |
5136 | { | |
5137 | static const char str[] = Z_SYM_NAME; | |
5138 | size_t len = strlen (str); | |
5139 | std::string lookup; | |
5140 | ||
5141 | for (size_t i = 1; i < len; i++) | |
5142 | { | |
5143 | lookup.assign (str, i); | |
5144 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
5145 | EXPECT (Z_SYM_NAME)); | |
5146 | } | |
5147 | } | |
5148 | ||
5149 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
5150 | { | |
5151 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
5152 | {}); | |
5153 | } | |
5154 | ||
5155 | /* A complete symbol with parameters matches any overload, since the | |
5156 | index has no overload info. */ | |
5157 | { | |
5158 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
5159 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
5160 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
5161 | EXPECT ("std::zfunction", "std::zfunction2")); | |
5162 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
5163 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
5164 | } |
5165 | ||
5166 | /* Check that whitespace is ignored appropriately. A symbol with a | |
5167 | template argument list. */ | |
5168 | { | |
5169 | static const char expected[] = "ns::foo<int>"; | |
5170 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
5171 | EXPECT (expected)); | |
a20714ff PA |
5172 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
5173 | EXPECT (expected)); | |
c62446b1 PA |
5174 | } |
5175 | ||
5176 | /* Check that whitespace is ignored appropriately. A symbol with a | |
5177 | template argument list that includes a pointer. */ | |
5178 | { | |
5179 | static const char expected[] = "ns::foo<char*>"; | |
5180 | /* Try both completion and non-completion modes. */ | |
5181 | static const bool completion_mode[2] = {false, true}; | |
5182 | for (size_t i = 0; i < 2; i++) | |
5183 | { | |
5184 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
5185 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
5186 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
5187 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
5188 | |
5189 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
5190 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
5191 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
5192 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
5193 | } |
5194 | } | |
5195 | ||
5196 | { | |
5197 | /* Check method qualifiers are ignored. */ | |
5198 | static const char expected[] = "ns::foo<char*>"; | |
5199 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
5200 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
5201 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
5202 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
5203 | CHECK_MATCH ("foo < char * > ( int ) const", |
5204 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
5205 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
5206 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
5207 | } |
5208 | ||
5209 | /* Test lookup names that don't match anything. */ | |
5210 | { | |
a20714ff PA |
5211 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
5212 | {}); | |
5213 | ||
c62446b1 PA |
5214 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
5215 | {}); | |
5216 | } | |
5217 | ||
a20714ff PA |
5218 | /* Some wild matching tests, exercising "(anonymous namespace)", |
5219 | which should not be confused with a parameter list. */ | |
5220 | { | |
5221 | static const char *syms[] = { | |
5222 | "A::B::C", | |
5223 | "B::C", | |
5224 | "C", | |
5225 | "A :: B :: C ( int )", | |
5226 | "B :: C ( int )", | |
5227 | "C ( int )", | |
5228 | }; | |
5229 | ||
5230 | for (const char *s : syms) | |
5231 | { | |
5232 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
5233 | EXPECT ("(anonymous namespace)::A::B::C")); | |
5234 | } | |
5235 | } | |
5236 | ||
5237 | { | |
5238 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
5239 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
5240 | EXPECT (expected)); | |
5241 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
5242 | EXPECT (expected)); | |
5243 | } | |
5244 | ||
c62446b1 PA |
5245 | SELF_CHECK (!any_mismatch); |
5246 | ||
5247 | #undef EXPECT | |
5248 | #undef CHECK_MATCH | |
5249 | } | |
5250 | ||
5c58de74 PA |
5251 | static void |
5252 | run_test () | |
5253 | { | |
5254 | test_mapped_index_find_name_component_bounds (); | |
5255 | test_dw2_expand_symtabs_matching_symbol (); | |
5256 | } | |
5257 | ||
c62446b1 PA |
5258 | }} // namespace selftests::dw2_expand_symtabs_matching |
5259 | ||
5260 | #endif /* GDB_SELF_TEST */ | |
5261 | ||
4b514bc8 JK |
5262 | /* If FILE_MATCHER is NULL or if PER_CU has |
5263 | dwarf2_per_cu_quick_data::MARK set (see | |
5264 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
5265 | EXPANSION_NOTIFY on it. */ | |
5266 | ||
5267 | static void | |
5268 | dw2_expand_symtabs_matching_one | |
5269 | (struct dwarf2_per_cu_data *per_cu, | |
5270 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5271 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
5272 | { | |
5273 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
5274 | { | |
5275 | bool symtab_was_null | |
5276 | = (per_cu->v.quick->compunit_symtab == NULL); | |
5277 | ||
5278 | dw2_instantiate_symtab (per_cu); | |
5279 | ||
5280 | if (expansion_notify != NULL | |
5281 | && symtab_was_null | |
5282 | && per_cu->v.quick->compunit_symtab != NULL) | |
5283 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
5284 | } | |
5285 | } | |
5286 | ||
3f563c84 PA |
5287 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
5288 | matched, to expand corresponding CUs that were marked. IDX is the | |
5289 | index of the symbol name that matched. */ | |
5290 | ||
5291 | static void | |
5292 | dw2_expand_marked_cus | |
5293 | (mapped_index &index, offset_type idx, | |
5294 | struct objfile *objfile, | |
5295 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5296 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5297 | search_domain kind) | |
5298 | { | |
3f563c84 PA |
5299 | offset_type *vec, vec_len, vec_idx; |
5300 | bool global_seen = false; | |
5301 | ||
61920122 | 5302 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 5303 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
5304 | vec_len = MAYBE_SWAP (vec[0]); |
5305 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
5306 | { | |
5307 | struct dwarf2_per_cu_data *per_cu; | |
5308 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); | |
5309 | /* This value is only valid for index versions >= 7. */ | |
5310 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
5311 | gdb_index_symbol_kind symbol_kind = | |
5312 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
5313 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
5314 | /* Only check the symbol attributes if they're present. | |
5315 | Indices prior to version 7 don't record them, | |
5316 | and indices >= 7 may elide them for certain symbols | |
5317 | (gold does this). */ | |
5318 | int attrs_valid = | |
5319 | (index.version >= 7 | |
5320 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
5321 | ||
5322 | /* Work around gold/15646. */ | |
5323 | if (attrs_valid) | |
9291a0cd | 5324 | { |
61920122 PA |
5325 | if (!is_static && global_seen) |
5326 | continue; | |
5327 | if (!is_static) | |
5328 | global_seen = true; | |
5329 | } | |
3190f0c6 | 5330 | |
61920122 PA |
5331 | /* Only check the symbol's kind if it has one. */ |
5332 | if (attrs_valid) | |
5333 | { | |
5334 | switch (kind) | |
8943b874 | 5335 | { |
61920122 PA |
5336 | case VARIABLES_DOMAIN: |
5337 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
5338 | continue; | |
5339 | break; | |
5340 | case FUNCTIONS_DOMAIN: | |
5341 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 5342 | continue; |
61920122 PA |
5343 | break; |
5344 | case TYPES_DOMAIN: | |
5345 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
5346 | continue; | |
5347 | break; | |
5348 | default: | |
5349 | break; | |
8943b874 | 5350 | } |
61920122 | 5351 | } |
8943b874 | 5352 | |
61920122 PA |
5353 | /* Don't crash on bad data. */ |
5354 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
5355 | + dwarf2_per_objfile->n_type_units)) | |
5356 | { | |
5357 | complaint (&symfile_complaints, | |
5358 | _(".gdb_index entry has bad CU index" | |
5359 | " [in module %s]"), objfile_name (objfile)); | |
5360 | continue; | |
5361 | } | |
5362 | ||
5363 | per_cu = dw2_get_cutu (cu_index); | |
4b514bc8 JK |
5364 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
5365 | expansion_notify); | |
61920122 PA |
5366 | } |
5367 | } | |
5368 | ||
4b514bc8 JK |
5369 | /* If FILE_MATCHER is non-NULL, set all the |
5370 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
5371 | that match FILE_MATCHER. */ | |
5372 | ||
61920122 | 5373 | static void |
4b514bc8 JK |
5374 | dw_expand_symtabs_matching_file_matcher |
5375 | (gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 5376 | { |
4b514bc8 | 5377 | if (file_matcher == NULL) |
61920122 PA |
5378 | return; |
5379 | ||
4b514bc8 JK |
5380 | objfile *const objfile = dwarf2_per_objfile->objfile; |
5381 | ||
5382 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
5383 | htab_eq_pointer, | |
5384 | NULL, xcalloc, xfree)); | |
5385 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
5386 | htab_eq_pointer, |
5387 | NULL, xcalloc, xfree)); | |
61920122 | 5388 | |
4b514bc8 JK |
5389 | /* The rule is CUs specify all the files, including those used by |
5390 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 5391 | |
927aa2e7 JK |
5392 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
5393 | { | |
5394 | int j; | |
5395 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5396 | struct quick_file_names *file_data; | |
5397 | void **slot; | |
5398 | ||
5399 | QUIT; | |
5400 | ||
5401 | per_cu->v.quick->mark = 0; | |
5402 | ||
5403 | /* We only need to look at symtabs not already expanded. */ | |
5404 | if (per_cu->v.quick->compunit_symtab) | |
5405 | continue; | |
5406 | ||
5407 | file_data = dw2_get_file_names (per_cu); | |
5408 | if (file_data == NULL) | |
5409 | continue; | |
5410 | ||
5411 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5412 | continue; | |
5413 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
5414 | { | |
5415 | per_cu->v.quick->mark = 1; | |
5416 | continue; | |
5417 | } | |
5418 | ||
5419 | for (j = 0; j < file_data->num_file_names; ++j) | |
5420 | { | |
5421 | const char *this_real_name; | |
5422 | ||
5423 | if (file_matcher (file_data->file_names[j], false)) | |
5424 | { | |
5425 | per_cu->v.quick->mark = 1; | |
5426 | break; | |
5427 | } | |
5428 | ||
5429 | /* Before we invoke realpath, which can get expensive when many | |
5430 | files are involved, do a quick comparison of the basenames. */ | |
5431 | if (!basenames_may_differ | |
5432 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5433 | true)) | |
5434 | continue; | |
5435 | ||
5436 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
5437 | if (file_matcher (this_real_name, false)) | |
5438 | { | |
5439 | per_cu->v.quick->mark = 1; | |
5440 | break; | |
5441 | } | |
5442 | } | |
5443 | ||
5444 | slot = htab_find_slot (per_cu->v.quick->mark | |
5445 | ? visited_found.get () | |
5446 | : visited_not_found.get (), | |
5447 | file_data, INSERT); | |
5448 | *slot = file_data; | |
5449 | } | |
5450 | } | |
5451 | ||
5452 | static void | |
5453 | dw2_expand_symtabs_matching | |
5454 | (struct objfile *objfile, | |
5455 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5456 | const lookup_name_info &lookup_name, | |
5457 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5458 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5459 | enum search_domain kind) | |
5460 | { | |
927aa2e7 JK |
5461 | dw2_setup (objfile); |
5462 | ||
5463 | /* index_table is NULL if OBJF_READNOW. */ | |
5464 | if (!dwarf2_per_objfile->index_table) | |
5465 | return; | |
5466 | ||
5467 | dw_expand_symtabs_matching_file_matcher (file_matcher); | |
5468 | ||
5469 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5470 | ||
5471 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5472 | symbol_matcher, | |
5473 | kind, [&] (offset_type idx) | |
5474 | { | |
5475 | dw2_expand_marked_cus (index, idx, objfile, file_matcher, | |
5476 | expansion_notify, kind); | |
5477 | }); | |
5478 | } | |
5479 | ||
5480 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
5481 | symtab. */ | |
5482 | ||
5483 | static struct compunit_symtab * | |
5484 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5485 | CORE_ADDR pc) | |
5486 | { | |
5487 | int i; | |
5488 | ||
5489 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
5490 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5491 | return cust; | |
5492 | ||
5493 | if (cust->includes == NULL) | |
5494 | return NULL; | |
5495 | ||
5496 | for (i = 0; cust->includes[i]; ++i) | |
5497 | { | |
5498 | struct compunit_symtab *s = cust->includes[i]; | |
5499 | ||
5500 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
5501 | if (s != NULL) | |
5502 | return s; | |
5503 | } | |
5504 | ||
5505 | return NULL; | |
5506 | } | |
5507 | ||
5508 | static struct compunit_symtab * | |
5509 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5510 | struct bound_minimal_symbol msymbol, | |
5511 | CORE_ADDR pc, | |
5512 | struct obj_section *section, | |
5513 | int warn_if_readin) | |
5514 | { | |
5515 | struct dwarf2_per_cu_data *data; | |
5516 | struct compunit_symtab *result; | |
5517 | ||
5518 | dw2_setup (objfile); | |
5519 | ||
5520 | if (!objfile->psymtabs_addrmap) | |
5521 | return NULL; | |
5522 | ||
5523 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, | |
5524 | pc); | |
5525 | if (!data) | |
5526 | return NULL; | |
5527 | ||
5528 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
5529 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
5530 | paddress (get_objfile_arch (objfile), pc)); | |
5531 | ||
5532 | result | |
5533 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
5534 | pc); | |
5535 | gdb_assert (result != NULL); | |
5536 | return result; | |
5537 | } | |
5538 | ||
5539 | static void | |
5540 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
5541 | void *data, int need_fullname) | |
5542 | { | |
5543 | dw2_setup (objfile); | |
5544 | ||
5545 | if (!dwarf2_per_objfile->filenames_cache) | |
5546 | { | |
5547 | dwarf2_per_objfile->filenames_cache.emplace (); | |
5548 | ||
5549 | htab_up visited (htab_create_alloc (10, | |
5550 | htab_hash_pointer, htab_eq_pointer, | |
5551 | NULL, xcalloc, xfree)); | |
5552 | ||
5553 | /* The rule is CUs specify all the files, including those used | |
5554 | by any TU, so there's no need to scan TUs here. We can | |
5555 | ignore file names coming from already-expanded CUs. */ | |
5556 | ||
5557 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5558 | { | |
5559 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
5560 | ||
5561 | if (per_cu->v.quick->compunit_symtab) | |
5562 | { | |
5563 | void **slot = htab_find_slot (visited.get (), | |
5564 | per_cu->v.quick->file_names, | |
5565 | INSERT); | |
5566 | ||
5567 | *slot = per_cu->v.quick->file_names; | |
5568 | } | |
5569 | } | |
5570 | ||
5571 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5572 | { | |
5573 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5574 | struct quick_file_names *file_data; | |
5575 | void **slot; | |
5576 | ||
5577 | /* We only need to look at symtabs not already expanded. */ | |
5578 | if (per_cu->v.quick->compunit_symtab) | |
5579 | continue; | |
5580 | ||
5581 | file_data = dw2_get_file_names (per_cu); | |
5582 | if (file_data == NULL) | |
5583 | continue; | |
5584 | ||
5585 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
5586 | if (*slot) | |
5587 | { | |
5588 | /* Already visited. */ | |
5589 | continue; | |
5590 | } | |
5591 | *slot = file_data; | |
5592 | ||
5593 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5594 | { | |
5595 | const char *filename = file_data->file_names[j]; | |
5596 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5597 | } | |
5598 | } | |
5599 | } | |
5600 | ||
5601 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5602 | { | |
5603 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
5604 | ||
5605 | if (need_fullname) | |
5606 | this_real_name = gdb_realpath (filename); | |
5607 | (*fun) (filename, this_real_name.get (), data); | |
5608 | }); | |
5609 | } | |
5610 | ||
5611 | static int | |
5612 | dw2_has_symbols (struct objfile *objfile) | |
5613 | { | |
5614 | return 1; | |
5615 | } | |
5616 | ||
5617 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5618 | { | |
5619 | dw2_has_symbols, | |
5620 | dw2_find_last_source_symtab, | |
5621 | dw2_forget_cached_source_info, | |
5622 | dw2_map_symtabs_matching_filename, | |
5623 | dw2_lookup_symbol, | |
5624 | dw2_print_stats, | |
5625 | dw2_dump, | |
5626 | dw2_relocate, | |
5627 | dw2_expand_symtabs_for_function, | |
5628 | dw2_expand_all_symtabs, | |
5629 | dw2_expand_symtabs_with_fullname, | |
5630 | dw2_map_matching_symbols, | |
5631 | dw2_expand_symtabs_matching, | |
5632 | dw2_find_pc_sect_compunit_symtab, | |
5633 | NULL, | |
5634 | dw2_map_symbol_filenames | |
5635 | }; | |
5636 | ||
5637 | /* DWARF-5 debug_names reader. */ | |
5638 | ||
5639 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
5640 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
5641 | ||
5642 | /* A helper function that reads the .debug_names section in SECTION | |
5643 | and fills in MAP. FILENAME is the name of the file containing the | |
5644 | section; it is used for error reporting. | |
5645 | ||
5646 | Returns true if all went well, false otherwise. */ | |
5647 | ||
5648 | static bool | |
5649 | read_debug_names_from_section (struct objfile *objfile, | |
5650 | const char *filename, | |
5651 | struct dwarf2_section_info *section, | |
5652 | mapped_debug_names &map) | |
5653 | { | |
5654 | if (dwarf2_section_empty_p (section)) | |
5655 | return false; | |
5656 | ||
5657 | /* Older elfutils strip versions could keep the section in the main | |
5658 | executable while splitting it for the separate debug info file. */ | |
5659 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
5660 | return false; | |
5661 | ||
5662 | dwarf2_read_section (objfile, section); | |
5663 | ||
5664 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
5665 | ||
5666 | const gdb_byte *addr = section->buffer; | |
5667 | ||
5668 | bfd *const abfd = get_section_bfd_owner (section); | |
5669 | ||
5670 | unsigned int bytes_read; | |
5671 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
5672 | addr += bytes_read; | |
5673 | ||
5674 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
5675 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
5676 | if (bytes_read + length != section->size) | |
5677 | { | |
5678 | /* There may be multiple per-CU indices. */ | |
5679 | warning (_("Section .debug_names in %s length %s does not match " | |
5680 | "section length %s, ignoring .debug_names."), | |
5681 | filename, plongest (bytes_read + length), | |
5682 | pulongest (section->size)); | |
5683 | return false; | |
5684 | } | |
5685 | ||
5686 | /* The version number. */ | |
5687 | uint16_t version = read_2_bytes (abfd, addr); | |
5688 | addr += 2; | |
5689 | if (version != 5) | |
5690 | { | |
5691 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
5692 | "ignoring .debug_names."), | |
5693 | filename, version); | |
5694 | return false; | |
5695 | } | |
5696 | ||
5697 | /* Padding. */ | |
5698 | uint16_t padding = read_2_bytes (abfd, addr); | |
5699 | addr += 2; | |
5700 | if (padding != 0) | |
5701 | { | |
5702 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
5703 | "ignoring .debug_names."), | |
5704 | filename, padding); | |
5705 | return false; | |
5706 | } | |
5707 | ||
5708 | /* comp_unit_count - The number of CUs in the CU list. */ | |
5709 | map.cu_count = read_4_bytes (abfd, addr); | |
5710 | addr += 4; | |
5711 | ||
5712 | /* local_type_unit_count - The number of TUs in the local TU | |
5713 | list. */ | |
5714 | map.tu_count = read_4_bytes (abfd, addr); | |
5715 | addr += 4; | |
5716 | ||
5717 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
5718 | list. */ | |
5719 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
5720 | addr += 4; | |
5721 | if (foreign_tu_count != 0) | |
5722 | { | |
5723 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
5724 | "ignoring .debug_names."), | |
5725 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
5726 | return false; | |
5727 | } | |
5728 | ||
5729 | /* bucket_count - The number of hash buckets in the hash lookup | |
5730 | table. */ | |
5731 | map.bucket_count = read_4_bytes (abfd, addr); | |
5732 | addr += 4; | |
5733 | ||
5734 | /* name_count - The number of unique names in the index. */ | |
5735 | map.name_count = read_4_bytes (abfd, addr); | |
5736 | addr += 4; | |
5737 | ||
5738 | /* abbrev_table_size - The size in bytes of the abbreviations | |
5739 | table. */ | |
5740 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
5741 | addr += 4; | |
5742 | ||
5743 | /* augmentation_string_size - The size in bytes of the augmentation | |
5744 | string. This value is rounded up to a multiple of 4. */ | |
5745 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
5746 | addr += 4; | |
5747 | map.augmentation_is_gdb = ((augmentation_string_size | |
5748 | == sizeof (dwarf5_augmentation)) | |
5749 | && memcmp (addr, dwarf5_augmentation, | |
5750 | sizeof (dwarf5_augmentation)) == 0); | |
5751 | augmentation_string_size += (-augmentation_string_size) & 3; | |
5752 | addr += augmentation_string_size; | |
5753 | ||
5754 | /* List of CUs */ | |
5755 | map.cu_table_reordered = addr; | |
5756 | addr += map.cu_count * map.offset_size; | |
5757 | ||
5758 | /* List of Local TUs */ | |
5759 | map.tu_table_reordered = addr; | |
5760 | addr += map.tu_count * map.offset_size; | |
5761 | ||
5762 | /* Hash Lookup Table */ | |
5763 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5764 | addr += map.bucket_count * 4; | |
5765 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5766 | addr += map.name_count * 4; | |
5767 | ||
5768 | /* Name Table */ | |
5769 | map.name_table_string_offs_reordered = addr; | |
5770 | addr += map.name_count * map.offset_size; | |
5771 | map.name_table_entry_offs_reordered = addr; | |
5772 | addr += map.name_count * map.offset_size; | |
5773 | ||
5774 | const gdb_byte *abbrev_table_start = addr; | |
5775 | for (;;) | |
5776 | { | |
5777 | unsigned int bytes_read; | |
5778 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5779 | addr += bytes_read; | |
5780 | if (index_num == 0) | |
5781 | break; | |
5782 | ||
5783 | const auto insertpair | |
5784 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
5785 | if (!insertpair.second) | |
5786 | { | |
5787 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
5788 | "ignoring .debug_names."), | |
5789 | filename, pulongest (index_num)); | |
5790 | return false; | |
5791 | } | |
5792 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
5793 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5794 | addr += bytes_read; | |
5795 | ||
5796 | for (;;) | |
5797 | { | |
5798 | mapped_debug_names::index_val::attr attr; | |
5799 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5800 | addr += bytes_read; | |
5801 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5802 | addr += bytes_read; | |
5803 | if (attr.form == DW_FORM_implicit_const) | |
5804 | { | |
5805 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
5806 | &bytes_read); | |
5807 | addr += bytes_read; | |
5808 | } | |
5809 | if (attr.dw_idx == 0 && attr.form == 0) | |
5810 | break; | |
5811 | indexval.attr_vec.push_back (std::move (attr)); | |
5812 | } | |
5813 | } | |
5814 | if (addr != abbrev_table_start + abbrev_table_size) | |
5815 | { | |
5816 | warning (_("Section .debug_names in %s has abbreviation_table " | |
5817 | "of size %zu vs. written as %u, ignoring .debug_names."), | |
5818 | filename, addr - abbrev_table_start, abbrev_table_size); | |
5819 | return false; | |
5820 | } | |
5821 | map.entry_pool = addr; | |
5822 | ||
5823 | return true; | |
5824 | } | |
5825 | ||
5826 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5827 | list. */ | |
5828 | ||
5829 | static void | |
5830 | create_cus_from_debug_names_list (struct objfile *objfile, | |
5831 | const mapped_debug_names &map, | |
5832 | dwarf2_section_info §ion, | |
5833 | bool is_dwz, int base_offset) | |
5834 | { | |
5835 | sect_offset sect_off_prev; | |
5836 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5837 | { | |
5838 | sect_offset sect_off_next; | |
5839 | if (i < map.cu_count) | |
5840 | { | |
5841 | sect_off_next | |
5842 | = (sect_offset) (extract_unsigned_integer | |
5843 | (map.cu_table_reordered + i * map.offset_size, | |
5844 | map.offset_size, | |
5845 | map.dwarf5_byte_order)); | |
5846 | } | |
5847 | else | |
5848 | sect_off_next = (sect_offset) section.size; | |
5849 | if (i >= 1) | |
5850 | { | |
5851 | const ULONGEST length = sect_off_next - sect_off_prev; | |
5852 | dwarf2_per_objfile->all_comp_units[base_offset + (i - 1)] | |
5853 | = create_cu_from_index_list (objfile, §ion, is_dwz, | |
5854 | sect_off_prev, length); | |
5855 | } | |
5856 | sect_off_prev = sect_off_next; | |
5857 | } | |
5858 | } | |
5859 | ||
5860 | /* Read the CU list from the mapped index, and use it to create all | |
5861 | the CU objects for this objfile. */ | |
5862 | ||
5863 | static void | |
5864 | create_cus_from_debug_names (struct objfile *objfile, | |
5865 | const mapped_debug_names &map, | |
5866 | const mapped_debug_names &dwz_map) | |
5867 | { | |
5868 | ||
5869 | dwarf2_per_objfile->n_comp_units = map.cu_count + dwz_map.cu_count; | |
5870 | dwarf2_per_objfile->all_comp_units | |
5871 | = XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
5872 | dwarf2_per_objfile->n_comp_units); | |
5873 | ||
5874 | create_cus_from_debug_names_list (objfile, map, dwarf2_per_objfile->info, | |
5875 | false /* is_dwz */, | |
5876 | 0 /* base_offset */); | |
5877 | ||
5878 | if (dwz_map.cu_count == 0) | |
5879 | return; | |
5880 | ||
5881 | dwz_file *dwz = dwarf2_get_dwz_file (); | |
5882 | create_cus_from_debug_names_list (objfile, dwz_map, dwz->info, | |
5883 | true /* is_dwz */, | |
5884 | map.cu_count /* base_offset */); | |
5885 | } | |
5886 | ||
5887 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5888 | elements of all the CUs and return true. Otherwise, return false. */ | |
5889 | ||
5890 | static bool | |
5891 | dwarf2_read_debug_names (struct objfile *objfile) | |
5892 | { | |
5893 | mapped_debug_names local_map, dwz_map; | |
5894 | ||
5895 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5896 | &dwarf2_per_objfile->debug_names, | |
5897 | local_map)) | |
5898 | return false; | |
5899 | ||
5900 | /* Don't use the index if it's empty. */ | |
5901 | if (local_map.name_count == 0) | |
5902 | return false; | |
5903 | ||
5904 | /* If there is a .dwz file, read it so we can get its CU list as | |
5905 | well. */ | |
5906 | dwz_file *dwz = dwarf2_get_dwz_file (); | |
5907 | if (dwz != NULL) | |
5908 | { | |
5909 | if (!read_debug_names_from_section (objfile, | |
5910 | bfd_get_filename (dwz->dwz_bfd), | |
5911 | &dwz->debug_names, dwz_map)) | |
5912 | { | |
5913 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
5914 | bfd_get_filename (dwz->dwz_bfd)); | |
5915 | return false; | |
5916 | } | |
5917 | } | |
5918 | ||
5919 | create_cus_from_debug_names (objfile, local_map, dwz_map); | |
5920 | ||
5921 | if (local_map.tu_count != 0) | |
5922 | { | |
5923 | /* We can only handle a single .debug_types when we have an | |
5924 | index. */ | |
5925 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
5926 | return false; | |
5927 | ||
5928 | dwarf2_section_info *section = VEC_index (dwarf2_section_info_def, | |
5929 | dwarf2_per_objfile->types, 0); | |
5930 | ||
5931 | create_signatured_type_table_from_debug_names | |
5932 | (objfile, local_map, section, &dwarf2_per_objfile->abbrev); | |
5933 | } | |
5934 | ||
5935 | create_addrmap_from_aranges (objfile, &dwarf2_per_objfile->debug_aranges); | |
5936 | ||
5937 | dwarf2_per_objfile->debug_names_table.reset (new mapped_debug_names); | |
5938 | *dwarf2_per_objfile->debug_names_table = std::move (local_map); | |
5939 | dwarf2_per_objfile->using_index = 1; | |
5940 | dwarf2_per_objfile->quick_file_names_table = | |
5941 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
5942 | ||
5943 | return true; | |
5944 | } | |
5945 | ||
5946 | /* Symbol name hashing function as specified by DWARF-5. */ | |
5947 | ||
5948 | static uint32_t | |
5949 | dwarf5_djb_hash (const char *str_) | |
5950 | { | |
5951 | const unsigned char *str = (const unsigned char *) str_; | |
5952 | ||
5953 | /* Note: tolower here ignores UTF-8, which isn't fully compliant. | |
5954 | See http://dwarfstd.org/ShowIssue.php?issue=161027.1. */ | |
5955 | ||
5956 | uint32_t hash = 5381; | |
5957 | while (int c = *str++) | |
5958 | hash = hash * 33 + tolower (c); | |
5959 | return hash; | |
5960 | } | |
5961 | ||
5962 | /* Type used to manage iterating over all CUs looking for a symbol for | |
5963 | .debug_names. */ | |
5964 | ||
5965 | class dw2_debug_names_iterator | |
5966 | { | |
5967 | public: | |
5968 | /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block | |
5969 | BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
5970 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5971 | bool want_specific_block, | |
5972 | block_enum block_index, domain_enum domain, | |
5973 | const char *name) | |
5974 | : m_map (map), m_want_specific_block (want_specific_block), | |
5975 | m_block_index (block_index), m_domain (domain), | |
5976 | m_addr (find_vec_in_debug_names (map, name)) | |
5977 | {} | |
5978 | ||
5979 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5980 | search_domain search, uint32_t namei) | |
5981 | : m_map (map), | |
5982 | m_search (search), | |
5983 | m_addr (find_vec_in_debug_names (map, namei)) | |
5984 | {} | |
5985 | ||
5986 | /* Return the next matching CU or NULL if there are no more. */ | |
5987 | dwarf2_per_cu_data *next (); | |
5988 | ||
5989 | private: | |
5990 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5991 | const char *name); | |
5992 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5993 | uint32_t namei); | |
5994 | ||
5995 | /* The internalized form of .debug_names. */ | |
5996 | const mapped_debug_names &m_map; | |
5997 | ||
5998 | /* If true, only look for symbols that match BLOCK_INDEX. */ | |
5999 | const bool m_want_specific_block = false; | |
6000 | ||
6001 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
6002 | Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid | |
6003 | value. */ | |
6004 | const block_enum m_block_index = FIRST_LOCAL_BLOCK; | |
6005 | ||
6006 | /* The kind of symbol we're looking for. */ | |
6007 | const domain_enum m_domain = UNDEF_DOMAIN; | |
6008 | const search_domain m_search = ALL_DOMAIN; | |
6009 | ||
6010 | /* The list of CUs from the index entry of the symbol, or NULL if | |
6011 | not found. */ | |
6012 | const gdb_byte *m_addr; | |
6013 | }; | |
6014 | ||
6015 | const char * | |
6016 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
6017 | { | |
6018 | const ULONGEST namei_string_offs | |
6019 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
6020 | + namei * offset_size), | |
6021 | offset_size, | |
6022 | dwarf5_byte_order); | |
6023 | return read_indirect_string_at_offset | |
6024 | (dwarf2_per_objfile->objfile->obfd, namei_string_offs); | |
6025 | } | |
6026 | ||
6027 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
6028 | found, return pointer to its pool data. If NAME cannot be found, | |
6029 | return NULL. */ | |
6030 | ||
6031 | const gdb_byte * | |
6032 | dw2_debug_names_iterator::find_vec_in_debug_names | |
6033 | (const mapped_debug_names &map, const char *name) | |
6034 | { | |
6035 | int (*cmp) (const char *, const char *); | |
6036 | ||
6037 | if (current_language->la_language == language_cplus | |
6038 | || current_language->la_language == language_fortran | |
6039 | || current_language->la_language == language_d) | |
6040 | { | |
6041 | /* NAME is already canonical. Drop any qualifiers as | |
6042 | .debug_names does not contain any. */ | |
6043 | ||
6044 | if (strchr (name, '(') != NULL) | |
6045 | { | |
6046 | gdb::unique_xmalloc_ptr<char> without_params | |
6047 | = cp_remove_params (name); | |
6048 | ||
6049 | if (without_params != NULL) | |
6050 | { | |
6051 | name = without_params.get(); | |
6052 | } | |
6053 | } | |
6054 | } | |
6055 | ||
6056 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
6057 | ||
6058 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
6059 | uint32_t namei | |
6060 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
6061 | (map.bucket_table_reordered | |
6062 | + (full_hash % map.bucket_count)), 4, | |
6063 | map.dwarf5_byte_order); | |
6064 | if (namei == 0) | |
6065 | return NULL; | |
6066 | --namei; | |
6067 | if (namei >= map.name_count) | |
6068 | { | |
6069 | complaint (&symfile_complaints, | |
6070 | _("Wrong .debug_names with name index %u but name_count=%u " | |
6071 | "[in module %s]"), | |
6072 | namei, map.name_count, | |
6073 | objfile_name (dwarf2_per_objfile->objfile)); | |
6074 | return NULL; | |
6075 | } | |
6076 | ||
6077 | for (;;) | |
6078 | { | |
6079 | const uint32_t namei_full_hash | |
6080 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
6081 | (map.hash_table_reordered + namei), 4, | |
6082 | map.dwarf5_byte_order); | |
6083 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
6084 | return NULL; | |
6085 | ||
6086 | if (full_hash == namei_full_hash) | |
6087 | { | |
6088 | const char *const namei_string = map.namei_to_name (namei); | |
6089 | ||
6090 | #if 0 /* An expensive sanity check. */ | |
6091 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
6092 | { | |
6093 | complaint (&symfile_complaints, | |
6094 | _("Wrong .debug_names hash for string at index %u " | |
6095 | "[in module %s]"), | |
6096 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
6097 | return NULL; | |
6098 | } | |
6099 | #endif | |
6100 | ||
6101 | if (cmp (namei_string, name) == 0) | |
6102 | { | |
6103 | const ULONGEST namei_entry_offs | |
6104 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
6105 | + namei * map.offset_size), | |
6106 | map.offset_size, map.dwarf5_byte_order); | |
6107 | return map.entry_pool + namei_entry_offs; | |
6108 | } | |
6109 | } | |
6110 | ||
6111 | ++namei; | |
6112 | if (namei >= map.name_count) | |
6113 | return NULL; | |
6114 | } | |
6115 | } | |
6116 | ||
6117 | const gdb_byte * | |
6118 | dw2_debug_names_iterator::find_vec_in_debug_names | |
6119 | (const mapped_debug_names &map, uint32_t namei) | |
6120 | { | |
6121 | if (namei >= map.name_count) | |
6122 | { | |
6123 | complaint (&symfile_complaints, | |
6124 | _("Wrong .debug_names with name index %u but name_count=%u " | |
6125 | "[in module %s]"), | |
6126 | namei, map.name_count, | |
6127 | objfile_name (dwarf2_per_objfile->objfile)); | |
6128 | return NULL; | |
6129 | } | |
6130 | ||
6131 | const ULONGEST namei_entry_offs | |
6132 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
6133 | + namei * map.offset_size), | |
6134 | map.offset_size, map.dwarf5_byte_order); | |
6135 | return map.entry_pool + namei_entry_offs; | |
6136 | } | |
6137 | ||
6138 | /* See dw2_debug_names_iterator. */ | |
6139 | ||
6140 | dwarf2_per_cu_data * | |
6141 | dw2_debug_names_iterator::next () | |
6142 | { | |
6143 | if (m_addr == NULL) | |
6144 | return NULL; | |
6145 | ||
6146 | bfd *const abfd = dwarf2_per_objfile->objfile->obfd; | |
6147 | ||
6148 | again: | |
6149 | ||
6150 | unsigned int bytes_read; | |
6151 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
6152 | m_addr += bytes_read; | |
6153 | if (abbrev == 0) | |
6154 | return NULL; | |
6155 | ||
6156 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
6157 | if (indexval_it == m_map.abbrev_map.cend ()) | |
6158 | { | |
6159 | complaint (&symfile_complaints, | |
6160 | _("Wrong .debug_names undefined abbrev code %s " | |
6161 | "[in module %s]"), | |
6162 | pulongest (abbrev), objfile_name (dwarf2_per_objfile->objfile)); | |
6163 | return NULL; | |
6164 | } | |
6165 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
6166 | bool have_is_static = false; | |
6167 | bool is_static; | |
6168 | dwarf2_per_cu_data *per_cu = NULL; | |
6169 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
6170 | { | |
6171 | ULONGEST ull; | |
6172 | switch (attr.form) | |
6173 | { | |
6174 | case DW_FORM_implicit_const: | |
6175 | ull = attr.implicit_const; | |
6176 | break; | |
6177 | case DW_FORM_flag_present: | |
6178 | ull = 1; | |
6179 | break; | |
6180 | case DW_FORM_udata: | |
6181 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
6182 | m_addr += bytes_read; | |
6183 | break; | |
6184 | default: | |
6185 | complaint (&symfile_complaints, | |
6186 | _("Unsupported .debug_names form %s [in module %s]"), | |
6187 | dwarf_form_name (attr.form), | |
6188 | objfile_name (dwarf2_per_objfile->objfile)); | |
6189 | return NULL; | |
6190 | } | |
6191 | switch (attr.dw_idx) | |
6192 | { | |
6193 | case DW_IDX_compile_unit: | |
6194 | /* Don't crash on bad data. */ | |
8af5c486 | 6195 | if (ull >= dwarf2_per_objfile->n_comp_units) |
927aa2e7 JK |
6196 | { |
6197 | complaint (&symfile_complaints, | |
6198 | _(".debug_names entry has bad CU index %s" | |
6199 | " [in module %s]"), | |
6200 | pulongest (ull), | |
6201 | objfile_name (dwarf2_per_objfile->objfile)); | |
6202 | continue; | |
6203 | } | |
6204 | per_cu = dw2_get_cutu (ull); | |
6205 | break; | |
8af5c486 JK |
6206 | case DW_IDX_type_unit: |
6207 | /* Don't crash on bad data. */ | |
6208 | if (ull >= dwarf2_per_objfile->n_type_units) | |
6209 | { | |
6210 | complaint (&symfile_complaints, | |
6211 | _(".debug_names entry has bad TU index %s" | |
6212 | " [in module %s]"), | |
6213 | pulongest (ull), | |
6214 | objfile_name (dwarf2_per_objfile->objfile)); | |
6215 | continue; | |
6216 | } | |
6217 | per_cu = dw2_get_cutu (dwarf2_per_objfile->n_comp_units + ull); | |
6218 | break; | |
927aa2e7 JK |
6219 | case DW_IDX_GNU_internal: |
6220 | if (!m_map.augmentation_is_gdb) | |
6221 | break; | |
6222 | have_is_static = true; | |
6223 | is_static = true; | |
6224 | break; | |
6225 | case DW_IDX_GNU_external: | |
6226 | if (!m_map.augmentation_is_gdb) | |
6227 | break; | |
6228 | have_is_static = true; | |
6229 | is_static = false; | |
6230 | break; | |
6231 | } | |
6232 | } | |
6233 | ||
6234 | /* Skip if already read in. */ | |
6235 | if (per_cu->v.quick->compunit_symtab) | |
6236 | goto again; | |
6237 | ||
6238 | /* Check static vs global. */ | |
6239 | if (have_is_static) | |
6240 | { | |
6241 | const bool want_static = m_block_index != GLOBAL_BLOCK; | |
6242 | if (m_want_specific_block && want_static != is_static) | |
6243 | goto again; | |
6244 | } | |
6245 | ||
6246 | /* Match dw2_symtab_iter_next, symbol_kind | |
6247 | and debug_names::psymbol_tag. */ | |
6248 | switch (m_domain) | |
6249 | { | |
6250 | case VAR_DOMAIN: | |
6251 | switch (indexval.dwarf_tag) | |
6252 | { | |
6253 | case DW_TAG_variable: | |
6254 | case DW_TAG_subprogram: | |
6255 | /* Some types are also in VAR_DOMAIN. */ | |
6256 | case DW_TAG_typedef: | |
6257 | case DW_TAG_structure_type: | |
6258 | break; | |
6259 | default: | |
6260 | goto again; | |
6261 | } | |
6262 | break; | |
6263 | case STRUCT_DOMAIN: | |
6264 | switch (indexval.dwarf_tag) | |
6265 | { | |
6266 | case DW_TAG_typedef: | |
6267 | case DW_TAG_structure_type: | |
6268 | break; | |
6269 | default: | |
6270 | goto again; | |
6271 | } | |
6272 | break; | |
6273 | case LABEL_DOMAIN: | |
6274 | switch (indexval.dwarf_tag) | |
6275 | { | |
6276 | case 0: | |
6277 | case DW_TAG_variable: | |
6278 | break; | |
6279 | default: | |
6280 | goto again; | |
6281 | } | |
6282 | break; | |
6283 | default: | |
6284 | break; | |
6285 | } | |
6286 | ||
6287 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
6288 | debug_names::psymbol_tag. */ | |
6289 | switch (m_search) | |
4b514bc8 | 6290 | { |
927aa2e7 JK |
6291 | case VARIABLES_DOMAIN: |
6292 | switch (indexval.dwarf_tag) | |
4b514bc8 | 6293 | { |
927aa2e7 JK |
6294 | case DW_TAG_variable: |
6295 | break; | |
6296 | default: | |
6297 | goto again; | |
4b514bc8 | 6298 | } |
927aa2e7 JK |
6299 | break; |
6300 | case FUNCTIONS_DOMAIN: | |
6301 | switch (indexval.dwarf_tag) | |
4b514bc8 | 6302 | { |
927aa2e7 JK |
6303 | case DW_TAG_subprogram: |
6304 | break; | |
6305 | default: | |
6306 | goto again; | |
4b514bc8 | 6307 | } |
927aa2e7 JK |
6308 | break; |
6309 | case TYPES_DOMAIN: | |
6310 | switch (indexval.dwarf_tag) | |
6311 | { | |
6312 | case DW_TAG_typedef: | |
6313 | case DW_TAG_structure_type: | |
6314 | break; | |
6315 | default: | |
6316 | goto again; | |
6317 | } | |
6318 | break; | |
6319 | default: | |
6320 | break; | |
4b514bc8 | 6321 | } |
927aa2e7 JK |
6322 | |
6323 | return per_cu; | |
4b514bc8 | 6324 | } |
61920122 | 6325 | |
927aa2e7 JK |
6326 | static struct compunit_symtab * |
6327 | dw2_debug_names_lookup_symbol (struct objfile *objfile, int block_index_int, | |
6328 | const char *name, domain_enum domain) | |
4b514bc8 | 6329 | { |
927aa2e7 | 6330 | const block_enum block_index = static_cast<block_enum> (block_index_int); |
4b514bc8 | 6331 | dw2_setup (objfile); |
61920122 | 6332 | |
927aa2e7 JK |
6333 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
6334 | if (!mapp) | |
61920122 | 6335 | { |
927aa2e7 JK |
6336 | /* index is NULL if OBJF_READNOW. */ |
6337 | return NULL; | |
6338 | } | |
6339 | const auto &map = *mapp; | |
9291a0cd | 6340 | |
927aa2e7 JK |
6341 | dw2_debug_names_iterator iter (map, true /* want_specific_block */, |
6342 | block_index, domain, name); | |
9703b513 | 6343 | |
927aa2e7 JK |
6344 | struct compunit_symtab *stab_best = NULL; |
6345 | struct dwarf2_per_cu_data *per_cu; | |
6346 | while ((per_cu = iter.next ()) != NULL) | |
6347 | { | |
6348 | struct symbol *sym, *with_opaque = NULL; | |
6349 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); | |
6350 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
6351 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
9703b513 | 6352 | |
927aa2e7 JK |
6353 | sym = block_find_symbol (block, name, domain, |
6354 | block_find_non_opaque_type_preferred, | |
6355 | &with_opaque); | |
9703b513 | 6356 | |
927aa2e7 JK |
6357 | /* Some caution must be observed with overloaded functions and |
6358 | methods, since the index will not contain any overload | |
6359 | information (but NAME might contain it). */ | |
a3ec0bb1 | 6360 | |
927aa2e7 JK |
6361 | if (sym != NULL |
6362 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) | |
6363 | return stab; | |
6364 | if (with_opaque != NULL | |
6365 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) | |
6366 | stab_best = stab; | |
9703b513 | 6367 | |
927aa2e7 | 6368 | /* Keep looking through other CUs. */ |
9703b513 TT |
6369 | } |
6370 | ||
927aa2e7 | 6371 | return stab_best; |
9703b513 TT |
6372 | } |
6373 | ||
927aa2e7 JK |
6374 | /* This dumps minimal information about .debug_names. It is called |
6375 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
6376 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 6377 | |
927aa2e7 JK |
6378 | static void |
6379 | dw2_debug_names_dump (struct objfile *objfile) | |
6380 | { | |
9291a0cd | 6381 | dw2_setup (objfile); |
927aa2e7 JK |
6382 | gdb_assert (dwarf2_per_objfile->using_index); |
6383 | printf_filtered (".debug_names:"); | |
6384 | if (dwarf2_per_objfile->debug_names_table) | |
6385 | printf_filtered (" exists\n"); | |
6386 | else | |
6387 | printf_filtered (" faked for \"readnow\"\n"); | |
6388 | printf_filtered ("\n"); | |
9291a0cd TT |
6389 | } |
6390 | ||
9291a0cd | 6391 | static void |
927aa2e7 JK |
6392 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
6393 | const char *func_name) | |
9291a0cd | 6394 | { |
9291a0cd | 6395 | dw2_setup (objfile); |
ae2de4f8 | 6396 | |
927aa2e7 JK |
6397 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
6398 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 6399 | { |
927aa2e7 | 6400 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 6401 | |
927aa2e7 JK |
6402 | /* Note: It doesn't matter what we pass for block_index here. */ |
6403 | dw2_debug_names_iterator iter (map, false /* want_specific_block */, | |
6404 | GLOBAL_BLOCK, VAR_DOMAIN, func_name); | |
24c79950 | 6405 | |
927aa2e7 JK |
6406 | struct dwarf2_per_cu_data *per_cu; |
6407 | while ((per_cu = iter.next ()) != NULL) | |
6408 | dw2_instantiate_symtab (per_cu); | |
6409 | } | |
6410 | } | |
24c79950 | 6411 | |
927aa2e7 JK |
6412 | static void |
6413 | dw2_debug_names_expand_symtabs_matching | |
6414 | (struct objfile *objfile, | |
6415 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
6416 | const lookup_name_info &lookup_name, | |
6417 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
6418 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
6419 | enum search_domain kind) | |
6420 | { | |
6421 | dw2_setup (objfile); | |
9291a0cd | 6422 | |
927aa2e7 JK |
6423 | /* debug_names_table is NULL if OBJF_READNOW. */ |
6424 | if (!dwarf2_per_objfile->debug_names_table) | |
6425 | return; | |
9291a0cd | 6426 | |
927aa2e7 | 6427 | dw_expand_symtabs_matching_file_matcher (file_matcher); |
24c79950 | 6428 | |
44ed8f3e | 6429 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 6430 | |
44ed8f3e PA |
6431 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
6432 | symbol_matcher, | |
6433 | kind, [&] (offset_type namei) | |
927aa2e7 | 6434 | { |
927aa2e7 JK |
6435 | /* The name was matched, now expand corresponding CUs that were |
6436 | marked. */ | |
6437 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 6438 | |
927aa2e7 JK |
6439 | struct dwarf2_per_cu_data *per_cu; |
6440 | while ((per_cu = iter.next ()) != NULL) | |
6441 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
6442 | expansion_notify); | |
44ed8f3e | 6443 | }); |
9291a0cd TT |
6444 | } |
6445 | ||
927aa2e7 | 6446 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
6447 | { |
6448 | dw2_has_symbols, | |
6449 | dw2_find_last_source_symtab, | |
6450 | dw2_forget_cached_source_info, | |
f8eba3c6 | 6451 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 6452 | dw2_debug_names_lookup_symbol, |
9291a0cd | 6453 | dw2_print_stats, |
927aa2e7 | 6454 | dw2_debug_names_dump, |
9291a0cd | 6455 | dw2_relocate, |
927aa2e7 | 6456 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 6457 | dw2_expand_all_symtabs, |
652a8996 | 6458 | dw2_expand_symtabs_with_fullname, |
40658b94 | 6459 | dw2_map_matching_symbols, |
927aa2e7 | 6460 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 6461 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 6462 | NULL, |
9291a0cd TT |
6463 | dw2_map_symbol_filenames |
6464 | }; | |
6465 | ||
3c0aa29a | 6466 | /* See symfile.h. */ |
9291a0cd | 6467 | |
3c0aa29a PA |
6468 | bool |
6469 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd TT |
6470 | { |
6471 | /* If we're about to read full symbols, don't bother with the | |
6472 | indices. In this case we also don't care if some other debug | |
6473 | format is making psymtabs, because they are all about to be | |
6474 | expanded anyway. */ | |
6475 | if ((objfile->flags & OBJF_READNOW)) | |
6476 | { | |
6477 | int i; | |
6478 | ||
6479 | dwarf2_per_objfile->using_index = 1; | |
6480 | create_all_comp_units (objfile); | |
0e50663e | 6481 | create_all_type_units (objfile); |
7b9f3c50 DE |
6482 | dwarf2_per_objfile->quick_file_names_table = |
6483 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 6484 | |
1fd400ff | 6485 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 6486 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 6487 | { |
8832e7e3 | 6488 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 6489 | |
e254ef6a DE |
6490 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6491 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
6492 | } |
6493 | ||
6494 | /* Return 1 so that gdb sees the "quick" functions. However, | |
6495 | these functions will be no-ops because we will have expanded | |
6496 | all symtabs. */ | |
3c0aa29a PA |
6497 | *index_kind = dw_index_kind::GDB_INDEX; |
6498 | return true; | |
9291a0cd TT |
6499 | } |
6500 | ||
927aa2e7 | 6501 | if (dwarf2_read_debug_names (objfile)) |
3c0aa29a PA |
6502 | { |
6503 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
6504 | return true; | |
6505 | } | |
927aa2e7 | 6506 | |
9291a0cd | 6507 | if (dwarf2_read_index (objfile)) |
3c0aa29a PA |
6508 | { |
6509 | *index_kind = dw_index_kind::GDB_INDEX; | |
6510 | return true; | |
6511 | } | |
9291a0cd | 6512 | |
3c0aa29a | 6513 | return false; |
9291a0cd TT |
6514 | } |
6515 | ||
6516 | \f | |
6517 | ||
dce234bc PP |
6518 | /* Build a partial symbol table. */ |
6519 | ||
6520 | void | |
f29dff0a | 6521 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 6522 | { |
c9bf0622 | 6523 | |
af5bf4ad SM |
6524 | if (objfile->global_psymbols.capacity () == 0 |
6525 | && objfile->static_psymbols.capacity () == 0) | |
6526 | init_psymbol_list (objfile, 1024); | |
c906108c | 6527 | |
492d29ea | 6528 | TRY |
c9bf0622 TT |
6529 | { |
6530 | /* This isn't really ideal: all the data we allocate on the | |
6531 | objfile's obstack is still uselessly kept around. However, | |
6532 | freeing it seems unsafe. */ | |
906768f9 | 6533 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 6534 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 6535 | psymtabs.keep (); |
c9bf0622 | 6536 | } |
492d29ea PA |
6537 | CATCH (except, RETURN_MASK_ERROR) |
6538 | { | |
6539 | exception_print (gdb_stderr, except); | |
6540 | } | |
6541 | END_CATCH | |
c906108c | 6542 | } |
c906108c | 6543 | |
1ce1cefd DE |
6544 | /* Return the total length of the CU described by HEADER. */ |
6545 | ||
6546 | static unsigned int | |
6547 | get_cu_length (const struct comp_unit_head *header) | |
6548 | { | |
6549 | return header->initial_length_size + header->length; | |
6550 | } | |
6551 | ||
9c541725 | 6552 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 6553 | |
9c541725 PA |
6554 | static inline bool |
6555 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 6556 | { |
9c541725 PA |
6557 | sect_offset bottom = cu_header->sect_off; |
6558 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 6559 | |
9c541725 | 6560 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
6561 | } |
6562 | ||
3b80fe9b DE |
6563 | /* Find the base address of the compilation unit for range lists and |
6564 | location lists. It will normally be specified by DW_AT_low_pc. | |
6565 | In DWARF-3 draft 4, the base address could be overridden by | |
6566 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
6567 | compilation units with discontinuous ranges. */ | |
6568 | ||
6569 | static void | |
6570 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
6571 | { | |
6572 | struct attribute *attr; | |
6573 | ||
6574 | cu->base_known = 0; | |
6575 | cu->base_address = 0; | |
6576 | ||
6577 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
6578 | if (attr) | |
6579 | { | |
31aa7e4e | 6580 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6581 | cu->base_known = 1; |
6582 | } | |
6583 | else | |
6584 | { | |
6585 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
6586 | if (attr) | |
6587 | { | |
31aa7e4e | 6588 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6589 | cu->base_known = 1; |
6590 | } | |
6591 | } | |
6592 | } | |
6593 | ||
93311388 | 6594 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 6595 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
6596 | NOTE: This leaves members offset, first_die_offset to be filled in |
6597 | by the caller. */ | |
107d2387 | 6598 | |
d521ce57 | 6599 | static const gdb_byte * |
107d2387 | 6600 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
6601 | const gdb_byte *info_ptr, |
6602 | struct dwarf2_section_info *section, | |
6603 | rcuh_kind section_kind) | |
107d2387 AC |
6604 | { |
6605 | int signed_addr; | |
891d2f0b | 6606 | unsigned int bytes_read; |
43988095 JK |
6607 | const char *filename = get_section_file_name (section); |
6608 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
6609 | |
6610 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
6611 | cu_header->initial_length_size = bytes_read; | |
6612 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 6613 | info_ptr += bytes_read; |
107d2387 AC |
6614 | cu_header->version = read_2_bytes (abfd, info_ptr); |
6615 | info_ptr += 2; | |
43988095 JK |
6616 | if (cu_header->version < 5) |
6617 | switch (section_kind) | |
6618 | { | |
6619 | case rcuh_kind::COMPILE: | |
6620 | cu_header->unit_type = DW_UT_compile; | |
6621 | break; | |
6622 | case rcuh_kind::TYPE: | |
6623 | cu_header->unit_type = DW_UT_type; | |
6624 | break; | |
6625 | default: | |
6626 | internal_error (__FILE__, __LINE__, | |
6627 | _("read_comp_unit_head: invalid section_kind")); | |
6628 | } | |
6629 | else | |
6630 | { | |
6631 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
6632 | (read_1_byte (abfd, info_ptr)); | |
6633 | info_ptr += 1; | |
6634 | switch (cu_header->unit_type) | |
6635 | { | |
6636 | case DW_UT_compile: | |
6637 | if (section_kind != rcuh_kind::COMPILE) | |
6638 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
6639 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
6640 | filename); | |
6641 | break; | |
6642 | case DW_UT_type: | |
6643 | section_kind = rcuh_kind::TYPE; | |
6644 | break; | |
6645 | default: | |
6646 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
6647 | "(is %d, should be %d or %d) [in module %s]"), | |
6648 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
6649 | } | |
6650 | ||
6651 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6652 | info_ptr += 1; | |
6653 | } | |
9c541725 PA |
6654 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
6655 | cu_header, | |
6656 | &bytes_read); | |
613e1657 | 6657 | info_ptr += bytes_read; |
43988095 JK |
6658 | if (cu_header->version < 5) |
6659 | { | |
6660 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6661 | info_ptr += 1; | |
6662 | } | |
107d2387 AC |
6663 | signed_addr = bfd_get_sign_extend_vma (abfd); |
6664 | if (signed_addr < 0) | |
8e65ff28 | 6665 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6666 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 6667 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 6668 | |
43988095 JK |
6669 | if (section_kind == rcuh_kind::TYPE) |
6670 | { | |
6671 | LONGEST type_offset; | |
6672 | ||
6673 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
6674 | info_ptr += 8; | |
6675 | ||
6676 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
6677 | info_ptr += bytes_read; | |
9c541725 PA |
6678 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
6679 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
6680 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
6681 | "header (is %s) [in module %s]"), plongest (type_offset), | |
6682 | filename); | |
6683 | } | |
6684 | ||
107d2387 AC |
6685 | return info_ptr; |
6686 | } | |
6687 | ||
36586728 TT |
6688 | /* Helper function that returns the proper abbrev section for |
6689 | THIS_CU. */ | |
6690 | ||
6691 | static struct dwarf2_section_info * | |
6692 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
6693 | { | |
6694 | struct dwarf2_section_info *abbrev; | |
6695 | ||
6696 | if (this_cu->is_dwz) | |
6697 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
6698 | else | |
6699 | abbrev = &dwarf2_per_objfile->abbrev; | |
6700 | ||
6701 | return abbrev; | |
6702 | } | |
6703 | ||
9ff913ba DE |
6704 | /* Subroutine of read_and_check_comp_unit_head and |
6705 | read_and_check_type_unit_head to simplify them. | |
6706 | Perform various error checking on the header. */ | |
6707 | ||
6708 | static void | |
6709 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
6710 | struct dwarf2_section_info *section, |
6711 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 6712 | { |
a32a8923 | 6713 | const char *filename = get_section_file_name (section); |
9ff913ba | 6714 | |
43988095 | 6715 | if (header->version < 2 || header->version > 5) |
9ff913ba | 6716 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 6717 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
6718 | filename); |
6719 | ||
9c541725 | 6720 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 6721 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
6722 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
6723 | "(offset 0x%x + 6) [in module %s]"), | |
6724 | to_underlying (header->abbrev_sect_off), | |
6725 | to_underlying (header->sect_off), | |
9ff913ba DE |
6726 | filename); |
6727 | ||
9c541725 | 6728 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 6729 | avoid potential 32-bit overflow. */ |
9c541725 | 6730 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 6731 | > section->size) |
9c541725 PA |
6732 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
6733 | "(offset 0x%x + 0) [in module %s]"), | |
6734 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
6735 | filename); |
6736 | } | |
6737 | ||
6738 | /* Read in a CU/TU header and perform some basic error checking. | |
6739 | The contents of the header are stored in HEADER. | |
6740 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 6741 | |
d521ce57 | 6742 | static const gdb_byte * |
9ff913ba DE |
6743 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
6744 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 6745 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 6746 | const gdb_byte *info_ptr, |
43988095 | 6747 | rcuh_kind section_kind) |
72bf9492 | 6748 | { |
d521ce57 | 6749 | const gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 | 6750 | |
9c541725 | 6751 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 6752 | |
43988095 | 6753 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 6754 | |
9c541725 | 6755 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 6756 | |
4bdcc0c1 | 6757 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
6758 | |
6759 | return info_ptr; | |
348e048f DE |
6760 | } |
6761 | ||
f4dc4d17 DE |
6762 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
6763 | ||
6764 | static sect_offset | |
6765 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 6766 | sect_offset sect_off) |
f4dc4d17 | 6767 | { |
a32a8923 | 6768 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 6769 | const gdb_byte *info_ptr; |
ac298888 | 6770 | unsigned int initial_length_size, offset_size; |
43988095 | 6771 | uint16_t version; |
f4dc4d17 DE |
6772 | |
6773 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 6774 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 6775 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 6776 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
6777 | info_ptr += initial_length_size; |
6778 | ||
6779 | version = read_2_bytes (abfd, info_ptr); | |
6780 | info_ptr += 2; | |
6781 | if (version >= 5) | |
6782 | { | |
6783 | /* Skip unit type and address size. */ | |
6784 | info_ptr += 2; | |
6785 | } | |
6786 | ||
9c541725 | 6787 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
6788 | } |
6789 | ||
aaa75496 JB |
6790 | /* Allocate a new partial symtab for file named NAME and mark this new |
6791 | partial symtab as being an include of PST. */ | |
6792 | ||
6793 | static void | |
d521ce57 | 6794 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
6795 | struct objfile *objfile) |
6796 | { | |
6797 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
6798 | ||
fbd9ab74 JK |
6799 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
6800 | { | |
6801 | /* It shares objfile->objfile_obstack. */ | |
6802 | subpst->dirname = pst->dirname; | |
6803 | } | |
6804 | ||
aaa75496 JB |
6805 | subpst->textlow = 0; |
6806 | subpst->texthigh = 0; | |
6807 | ||
8d749320 SM |
6808 | subpst->dependencies |
6809 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
6810 | subpst->dependencies[0] = pst; |
6811 | subpst->number_of_dependencies = 1; | |
6812 | ||
6813 | subpst->globals_offset = 0; | |
6814 | subpst->n_global_syms = 0; | |
6815 | subpst->statics_offset = 0; | |
6816 | subpst->n_static_syms = 0; | |
43f3e411 | 6817 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
6818 | subpst->read_symtab = pst->read_symtab; |
6819 | subpst->readin = 0; | |
6820 | ||
6821 | /* No private part is necessary for include psymtabs. This property | |
6822 | can be used to differentiate between such include psymtabs and | |
10b3939b | 6823 | the regular ones. */ |
58a9656e | 6824 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
6825 | } |
6826 | ||
6827 | /* Read the Line Number Program data and extract the list of files | |
6828 | included by the source file represented by PST. Build an include | |
d85a05f0 | 6829 | partial symtab for each of these included files. */ |
aaa75496 JB |
6830 | |
6831 | static void | |
6832 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
6833 | struct die_info *die, |
6834 | struct partial_symtab *pst) | |
aaa75496 | 6835 | { |
fff8551c | 6836 | line_header_up lh; |
d85a05f0 | 6837 | struct attribute *attr; |
aaa75496 | 6838 | |
d85a05f0 DJ |
6839 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
6840 | if (attr) | |
9c541725 | 6841 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
6842 | if (lh == NULL) |
6843 | return; /* No linetable, so no includes. */ | |
6844 | ||
c6da4cef | 6845 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 6846 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
6847 | } |
6848 | ||
348e048f | 6849 | static hashval_t |
52dc124a | 6850 | hash_signatured_type (const void *item) |
348e048f | 6851 | { |
9a3c8263 SM |
6852 | const struct signatured_type *sig_type |
6853 | = (const struct signatured_type *) item; | |
9a619af0 | 6854 | |
348e048f | 6855 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 6856 | return sig_type->signature; |
348e048f DE |
6857 | } |
6858 | ||
6859 | static int | |
52dc124a | 6860 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 6861 | { |
9a3c8263 SM |
6862 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
6863 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 6864 | |
348e048f DE |
6865 | return lhs->signature == rhs->signature; |
6866 | } | |
6867 | ||
1fd400ff TT |
6868 | /* Allocate a hash table for signatured types. */ |
6869 | ||
6870 | static htab_t | |
673bfd45 | 6871 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
6872 | { |
6873 | return htab_create_alloc_ex (41, | |
52dc124a DE |
6874 | hash_signatured_type, |
6875 | eq_signatured_type, | |
1fd400ff TT |
6876 | NULL, |
6877 | &objfile->objfile_obstack, | |
6878 | hashtab_obstack_allocate, | |
6879 | dummy_obstack_deallocate); | |
6880 | } | |
6881 | ||
d467dd73 | 6882 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6883 | |
6884 | static int | |
d467dd73 | 6885 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6886 | { |
9a3c8263 SM |
6887 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
6888 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 6889 | |
b4dd5633 | 6890 | **datap = sigt; |
1fd400ff TT |
6891 | ++*datap; |
6892 | ||
6893 | return 1; | |
6894 | } | |
6895 | ||
78d4d2c5 | 6896 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6897 | and fill them into TYPES_HTAB. It will process only type units, |
6898 | therefore DW_UT_type. */ | |
c88ee1f0 | 6899 | |
78d4d2c5 JK |
6900 | static void |
6901 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
6902 | dwarf2_section_info *section, htab_t &types_htab, |
6903 | rcuh_kind section_kind) | |
348e048f | 6904 | { |
3019eac3 | 6905 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6906 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6907 | bfd *abfd; |
6908 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6909 | |
4bdcc0c1 DE |
6910 | abbrev_section = (dwo_file != NULL |
6911 | ? &dwo_file->sections.abbrev | |
6912 | : &dwarf2_per_objfile->abbrev); | |
6913 | ||
b4f54984 | 6914 | if (dwarf_read_debug) |
43988095 JK |
6915 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
6916 | get_section_name (section), | |
a32a8923 | 6917 | get_section_file_name (abbrev_section)); |
09406207 | 6918 | |
78d4d2c5 JK |
6919 | dwarf2_read_section (objfile, section); |
6920 | info_ptr = section->buffer; | |
348e048f | 6921 | |
78d4d2c5 JK |
6922 | if (info_ptr == NULL) |
6923 | return; | |
348e048f | 6924 | |
78d4d2c5 JK |
6925 | /* We can't set abfd until now because the section may be empty or |
6926 | not present, in which case the bfd is unknown. */ | |
6927 | abfd = get_section_bfd_owner (section); | |
348e048f | 6928 | |
78d4d2c5 JK |
6929 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
6930 | because we don't need to read any dies: the signature is in the | |
6931 | header. */ | |
3019eac3 | 6932 | |
78d4d2c5 JK |
6933 | end_ptr = info_ptr + section->size; |
6934 | while (info_ptr < end_ptr) | |
6935 | { | |
78d4d2c5 JK |
6936 | struct signatured_type *sig_type; |
6937 | struct dwo_unit *dwo_tu; | |
6938 | void **slot; | |
6939 | const gdb_byte *ptr = info_ptr; | |
6940 | struct comp_unit_head header; | |
6941 | unsigned int length; | |
8b70b953 | 6942 | |
9c541725 | 6943 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6944 | |
a49dd8dd JK |
6945 | /* Initialize it due to a false compiler warning. */ |
6946 | header.signature = -1; | |
9c541725 | 6947 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6948 | |
78d4d2c5 JK |
6949 | /* We need to read the type's signature in order to build the hash |
6950 | table, but we don't need anything else just yet. */ | |
348e048f | 6951 | |
43988095 JK |
6952 | ptr = read_and_check_comp_unit_head (&header, section, |
6953 | abbrev_section, ptr, section_kind); | |
348e048f | 6954 | |
78d4d2c5 | 6955 | length = get_cu_length (&header); |
6caca83c | 6956 | |
78d4d2c5 JK |
6957 | /* Skip dummy type units. */ |
6958 | if (ptr >= info_ptr + length | |
43988095 JK |
6959 | || peek_abbrev_code (abfd, ptr) == 0 |
6960 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6961 | { |
6962 | info_ptr += length; | |
6963 | continue; | |
6964 | } | |
dee91e82 | 6965 | |
78d4d2c5 JK |
6966 | if (types_htab == NULL) |
6967 | { | |
6968 | if (dwo_file) | |
6969 | types_htab = allocate_dwo_unit_table (objfile); | |
6970 | else | |
6971 | types_htab = allocate_signatured_type_table (objfile); | |
6972 | } | |
8b70b953 | 6973 | |
78d4d2c5 JK |
6974 | if (dwo_file) |
6975 | { | |
6976 | sig_type = NULL; | |
6977 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6978 | struct dwo_unit); | |
6979 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6980 | dwo_tu->signature = header.signature; |
9c541725 | 6981 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6982 | dwo_tu->section = section; |
9c541725 | 6983 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6984 | dwo_tu->length = length; |
6985 | } | |
6986 | else | |
6987 | { | |
6988 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6989 | The real type_offset is in the DWO file. */ | |
6990 | dwo_tu = NULL; | |
6991 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6992 | struct signatured_type); | |
43988095 | 6993 | sig_type->signature = header.signature; |
9c541725 | 6994 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
6995 | sig_type->per_cu.objfile = objfile; |
6996 | sig_type->per_cu.is_debug_types = 1; | |
6997 | sig_type->per_cu.section = section; | |
9c541725 | 6998 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6999 | sig_type->per_cu.length = length; |
7000 | } | |
7001 | ||
7002 | slot = htab_find_slot (types_htab, | |
7003 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
7004 | INSERT); | |
7005 | gdb_assert (slot != NULL); | |
7006 | if (*slot != NULL) | |
7007 | { | |
9c541725 | 7008 | sect_offset dup_sect_off; |
0349ea22 | 7009 | |
3019eac3 DE |
7010 | if (dwo_file) |
7011 | { | |
78d4d2c5 JK |
7012 | const struct dwo_unit *dup_tu |
7013 | = (const struct dwo_unit *) *slot; | |
7014 | ||
9c541725 | 7015 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
7016 | } |
7017 | else | |
7018 | { | |
78d4d2c5 JK |
7019 | const struct signatured_type *dup_tu |
7020 | = (const struct signatured_type *) *slot; | |
7021 | ||
9c541725 | 7022 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 7023 | } |
8b70b953 | 7024 | |
78d4d2c5 JK |
7025 | complaint (&symfile_complaints, |
7026 | _("debug type entry at offset 0x%x is duplicate to" | |
7027 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 7028 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 7029 | hex_string (header.signature)); |
78d4d2c5 JK |
7030 | } |
7031 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 7032 | |
78d4d2c5 JK |
7033 | if (dwarf_read_debug > 1) |
7034 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 7035 | to_underlying (sect_off), |
43988095 | 7036 | hex_string (header.signature)); |
3019eac3 | 7037 | |
78d4d2c5 JK |
7038 | info_ptr += length; |
7039 | } | |
7040 | } | |
3019eac3 | 7041 | |
78d4d2c5 JK |
7042 | /* Create the hash table of all entries in the .debug_types |
7043 | (or .debug_types.dwo) section(s). | |
7044 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
7045 | otherwise it is NULL. | |
b3c8eb43 | 7046 | |
78d4d2c5 | 7047 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 7048 | |
78d4d2c5 | 7049 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 7050 | |
78d4d2c5 JK |
7051 | static void |
7052 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
7053 | VEC (dwarf2_section_info_def) *types, | |
7054 | htab_t &types_htab) | |
7055 | { | |
7056 | int ix; | |
7057 | struct dwarf2_section_info *section; | |
7058 | ||
7059 | if (VEC_empty (dwarf2_section_info_def, types)) | |
7060 | return; | |
348e048f | 7061 | |
78d4d2c5 JK |
7062 | for (ix = 0; |
7063 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
7064 | ++ix) | |
43988095 JK |
7065 | create_debug_type_hash_table (dwo_file, section, types_htab, |
7066 | rcuh_kind::TYPE); | |
3019eac3 DE |
7067 | } |
7068 | ||
7069 | /* Create the hash table of all entries in the .debug_types section, | |
7070 | and initialize all_type_units. | |
7071 | The result is zero if there is an error (e.g. missing .debug_types section), | |
7072 | otherwise non-zero. */ | |
7073 | ||
7074 | static int | |
7075 | create_all_type_units (struct objfile *objfile) | |
7076 | { | |
78d4d2c5 | 7077 | htab_t types_htab = NULL; |
b4dd5633 | 7078 | struct signatured_type **iter; |
3019eac3 | 7079 | |
43988095 JK |
7080 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
7081 | rcuh_kind::COMPILE); | |
78d4d2c5 | 7082 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
7083 | if (types_htab == NULL) |
7084 | { | |
7085 | dwarf2_per_objfile->signatured_types = NULL; | |
7086 | return 0; | |
7087 | } | |
7088 | ||
348e048f DE |
7089 | dwarf2_per_objfile->signatured_types = types_htab; |
7090 | ||
6aa5f3a6 DE |
7091 | dwarf2_per_objfile->n_type_units |
7092 | = dwarf2_per_objfile->n_allocated_type_units | |
7093 | = htab_elements (types_htab); | |
8d749320 SM |
7094 | dwarf2_per_objfile->all_type_units = |
7095 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
7096 | iter = &dwarf2_per_objfile->all_type_units[0]; |
7097 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
7098 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
7099 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 7100 | |
348e048f DE |
7101 | return 1; |
7102 | } | |
7103 | ||
6aa5f3a6 DE |
7104 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
7105 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
7106 | Otherwise we find one. */ | |
7107 | ||
7108 | static struct signatured_type * | |
7109 | add_type_unit (ULONGEST sig, void **slot) | |
7110 | { | |
7111 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7112 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
7113 | struct signatured_type *sig_type; | |
7114 | ||
7115 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
7116 | ++n_type_units; | |
7117 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
7118 | { | |
7119 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
7120 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
7121 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
7122 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
7123 | = XRESIZEVEC (struct signatured_type *, |
7124 | dwarf2_per_objfile->all_type_units, | |
7125 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
7126 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
7127 | } | |
7128 | dwarf2_per_objfile->n_type_units = n_type_units; | |
7129 | ||
7130 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7131 | struct signatured_type); | |
7132 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
7133 | sig_type->signature = sig; | |
7134 | sig_type->per_cu.is_debug_types = 1; | |
7135 | if (dwarf2_per_objfile->using_index) | |
7136 | { | |
7137 | sig_type->per_cu.v.quick = | |
7138 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7139 | struct dwarf2_per_cu_quick_data); | |
7140 | } | |
7141 | ||
7142 | if (slot == NULL) | |
7143 | { | |
7144 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
7145 | sig_type, INSERT); | |
7146 | } | |
7147 | gdb_assert (*slot == NULL); | |
7148 | *slot = sig_type; | |
7149 | /* The rest of sig_type must be filled in by the caller. */ | |
7150 | return sig_type; | |
7151 | } | |
7152 | ||
a2ce51a0 DE |
7153 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
7154 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
7155 | ||
7156 | static void | |
7157 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
7158 | struct signatured_type *sig_entry, | |
7159 | struct dwo_unit *dwo_entry) | |
7160 | { | |
7ee85ab1 | 7161 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
7162 | gdb_assert (! sig_entry->per_cu.queued); |
7163 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
7164 | if (dwarf2_per_objfile->using_index) |
7165 | { | |
7166 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 7167 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
7168 | } |
7169 | else | |
7170 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 7171 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 7172 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 7173 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
7174 | gdb_assert (sig_entry->dwo_unit == NULL); |
7175 | ||
7176 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 7177 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
7178 | sig_entry->per_cu.length = dwo_entry->length; |
7179 | sig_entry->per_cu.reading_dwo_directly = 1; | |
7180 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
7181 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
7182 | sig_entry->dwo_unit = dwo_entry; | |
7183 | } | |
7184 | ||
7185 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
7186 | If we haven't read the TU yet, create the signatured_type data structure |
7187 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
7188 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
7189 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
7190 | containing that CU. Otherwise we could end up reading several other DWO | |
7191 | files (due to comdat folding) to process the transitive closure of all the | |
7192 | mentioned TUs, and that can be slow. The current DWO file will have every | |
7193 | type signature that it needs. | |
a2ce51a0 DE |
7194 | We only do this for .gdb_index because in the psymtab case we already have |
7195 | to read all the DWOs to build the type unit groups. */ | |
7196 | ||
7197 | static struct signatured_type * | |
7198 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
7199 | { | |
7200 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7201 | struct dwo_file *dwo_file; | |
7202 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
7203 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 7204 | void **slot; |
a2ce51a0 DE |
7205 | |
7206 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
7207 | ||
6aa5f3a6 DE |
7208 | /* If TU skeletons have been removed then we may not have read in any |
7209 | TUs yet. */ | |
7210 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7211 | { | |
7212 | dwarf2_per_objfile->signatured_types | |
7213 | = allocate_signatured_type_table (objfile); | |
7214 | } | |
a2ce51a0 DE |
7215 | |
7216 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
7217 | Use the global signatured_types array to do our own comdat-folding |
7218 | of types. If this is the first time we're reading this TU, and | |
7219 | the TU has an entry in .gdb_index, replace the recorded data from | |
7220 | .gdb_index with this TU. */ | |
a2ce51a0 | 7221 | |
a2ce51a0 | 7222 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
7223 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
7224 | &find_sig_entry, INSERT); | |
9a3c8263 | 7225 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
7226 | |
7227 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
7228 | read. Don't reassign the global entry to point to this DWO if that's |
7229 | the case. Also note that if the TU is already being read, it may not | |
7230 | have come from a DWO, the program may be a mix of Fission-compiled | |
7231 | code and non-Fission-compiled code. */ | |
7232 | ||
7233 | /* Have we already tried to read this TU? | |
7234 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
7235 | needn't exist in the global table yet). */ | |
7236 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
7237 | return sig_entry; |
7238 | ||
6aa5f3a6 DE |
7239 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
7240 | dwo_unit of the TU itself. */ | |
7241 | dwo_file = cu->dwo_unit->dwo_file; | |
7242 | ||
a2ce51a0 DE |
7243 | /* Ok, this is the first time we're reading this TU. */ |
7244 | if (dwo_file->tus == NULL) | |
7245 | return NULL; | |
7246 | find_dwo_entry.signature = sig; | |
9a3c8263 | 7247 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
7248 | if (dwo_entry == NULL) |
7249 | return NULL; | |
7250 | ||
6aa5f3a6 DE |
7251 | /* If the global table doesn't have an entry for this TU, add one. */ |
7252 | if (sig_entry == NULL) | |
7253 | sig_entry = add_type_unit (sig, slot); | |
7254 | ||
a2ce51a0 | 7255 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 7256 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
7257 | return sig_entry; |
7258 | } | |
7259 | ||
a2ce51a0 DE |
7260 | /* Subroutine of lookup_signatured_type. |
7261 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
7262 | then try the DWP file. If the TU stub (skeleton) has been removed then |
7263 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
7264 | |
7265 | static struct signatured_type * | |
7266 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
7267 | { | |
7268 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7269 | struct dwp_file *dwp_file = get_dwp_file (); | |
7270 | struct dwo_unit *dwo_entry; | |
7271 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 7272 | void **slot; |
a2ce51a0 DE |
7273 | |
7274 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
7275 | gdb_assert (dwp_file != NULL); | |
7276 | ||
6aa5f3a6 DE |
7277 | /* If TU skeletons have been removed then we may not have read in any |
7278 | TUs yet. */ | |
7279 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 7280 | { |
6aa5f3a6 DE |
7281 | dwarf2_per_objfile->signatured_types |
7282 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
7283 | } |
7284 | ||
6aa5f3a6 DE |
7285 | find_sig_entry.signature = sig; |
7286 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
7287 | &find_sig_entry, INSERT); | |
9a3c8263 | 7288 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
7289 | |
7290 | /* Have we already tried to read this TU? | |
7291 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
7292 | needn't exist in the global table yet). */ | |
7293 | if (sig_entry != NULL) | |
7294 | return sig_entry; | |
7295 | ||
a2ce51a0 DE |
7296 | if (dwp_file->tus == NULL) |
7297 | return NULL; | |
57d63ce2 DE |
7298 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
7299 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
7300 | if (dwo_entry == NULL) |
7301 | return NULL; | |
7302 | ||
6aa5f3a6 | 7303 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
7304 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
7305 | ||
a2ce51a0 DE |
7306 | return sig_entry; |
7307 | } | |
7308 | ||
380bca97 | 7309 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
7310 | Returns NULL if signature SIG is not present in the table. |
7311 | It is up to the caller to complain about this. */ | |
348e048f DE |
7312 | |
7313 | static struct signatured_type * | |
a2ce51a0 | 7314 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 7315 | { |
a2ce51a0 DE |
7316 | if (cu->dwo_unit |
7317 | && dwarf2_per_objfile->using_index) | |
7318 | { | |
7319 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
7320 | These cases require special processing. */ | |
7321 | if (get_dwp_file () == NULL) | |
7322 | return lookup_dwo_signatured_type (cu, sig); | |
7323 | else | |
7324 | return lookup_dwp_signatured_type (cu, sig); | |
7325 | } | |
7326 | else | |
7327 | { | |
7328 | struct signatured_type find_entry, *entry; | |
348e048f | 7329 | |
a2ce51a0 DE |
7330 | if (dwarf2_per_objfile->signatured_types == NULL) |
7331 | return NULL; | |
7332 | find_entry.signature = sig; | |
9a3c8263 SM |
7333 | entry = ((struct signatured_type *) |
7334 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
7335 | return entry; |
7336 | } | |
348e048f | 7337 | } |
42e7ad6c DE |
7338 | \f |
7339 | /* Low level DIE reading support. */ | |
348e048f | 7340 | |
d85a05f0 DJ |
7341 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
7342 | ||
7343 | static void | |
7344 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 7345 | struct dwarf2_cu *cu, |
3019eac3 DE |
7346 | struct dwarf2_section_info *section, |
7347 | struct dwo_file *dwo_file) | |
d85a05f0 | 7348 | { |
fceca515 | 7349 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 7350 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 7351 | reader->cu = cu; |
3019eac3 | 7352 | reader->dwo_file = dwo_file; |
dee91e82 DE |
7353 | reader->die_section = section; |
7354 | reader->buffer = section->buffer; | |
f664829e | 7355 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 7356 | reader->comp_dir = NULL; |
d85a05f0 DJ |
7357 | } |
7358 | ||
b0c7bfa9 DE |
7359 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7360 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
7361 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
7362 | already. | |
7363 | ||
7364 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
7365 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
7366 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
7367 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
7368 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
7369 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
7370 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
7371 | are filled in with the info of the DIE from the DWO file. | |
7372 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
7373 | provided an abbrev table to use. | |
7374 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
7375 | ||
7376 | static int | |
7377 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
7378 | struct dwo_unit *dwo_unit, | |
7379 | int abbrev_table_provided, | |
7380 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 7381 | const char *stub_comp_dir, |
b0c7bfa9 | 7382 | struct die_reader_specs *result_reader, |
d521ce57 | 7383 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
7384 | struct die_info **result_comp_unit_die, |
7385 | int *result_has_children) | |
7386 | { | |
7387 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7388 | struct dwarf2_cu *cu = this_cu->cu; | |
7389 | struct dwarf2_section_info *section; | |
7390 | bfd *abfd; | |
d521ce57 | 7391 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
7392 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
7393 | int i,num_extra_attrs; | |
7394 | struct dwarf2_section_info *dwo_abbrev_section; | |
7395 | struct attribute *attr; | |
7396 | struct die_info *comp_unit_die; | |
7397 | ||
b0aeadb3 DE |
7398 | /* At most one of these may be provided. */ |
7399 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 7400 | |
b0c7bfa9 DE |
7401 | /* These attributes aren't processed until later: |
7402 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
7403 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
7404 | referenced later. However, these attributes are found in the stub | |
7405 | which we won't have later. In order to not impose this complication | |
7406 | on the rest of the code, we read them here and copy them to the | |
7407 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
7408 | |
7409 | stmt_list = NULL; | |
7410 | low_pc = NULL; | |
7411 | high_pc = NULL; | |
7412 | ranges = NULL; | |
7413 | comp_dir = NULL; | |
7414 | ||
7415 | if (stub_comp_unit_die != NULL) | |
7416 | { | |
7417 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
7418 | DWO file. */ | |
7419 | if (! this_cu->is_debug_types) | |
7420 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
7421 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
7422 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
7423 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
7424 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
7425 | ||
7426 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
7427 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
7428 | cu->addr_base = 0; | |
7429 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
7430 | if (attr) | |
7431 | cu->addr_base = DW_UNSND (attr); | |
7432 | ||
7433 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
7434 | We need the value before we can process DW_AT_ranges. */ | |
7435 | cu->ranges_base = 0; | |
7436 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
7437 | if (attr) | |
7438 | cu->ranges_base = DW_UNSND (attr); | |
7439 | } | |
a2ce51a0 DE |
7440 | else if (stub_comp_dir != NULL) |
7441 | { | |
7442 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 7443 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
7444 | comp_dir->name = DW_AT_comp_dir; |
7445 | comp_dir->form = DW_FORM_string; | |
7446 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
7447 | DW_STRING (comp_dir) = stub_comp_dir; | |
7448 | } | |
b0c7bfa9 DE |
7449 | |
7450 | /* Set up for reading the DWO CU/TU. */ | |
7451 | cu->dwo_unit = dwo_unit; | |
7452 | section = dwo_unit->section; | |
7453 | dwarf2_read_section (objfile, section); | |
a32a8923 | 7454 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
7455 | begin_info_ptr = info_ptr = (section->buffer |
7456 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
7457 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
7458 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
7459 | ||
7460 | if (this_cu->is_debug_types) | |
7461 | { | |
b0c7bfa9 DE |
7462 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
7463 | ||
43988095 | 7464 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 7465 | dwo_abbrev_section, |
43988095 | 7466 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 7467 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 7468 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
7469 | { |
7470 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
7471 | " TU at offset 0x%x [in module %s]"), | |
7472 | hex_string (sig_type->signature), | |
43988095 | 7473 | hex_string (cu->header.signature), |
9c541725 | 7474 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
7475 | bfd_get_filename (abfd)); |
7476 | } | |
9c541725 | 7477 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7478 | /* For DWOs coming from DWP files, we don't know the CU length |
7479 | nor the type's offset in the TU until now. */ | |
7480 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 7481 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
7482 | |
7483 | /* Establish the type offset that can be used to lookup the type. | |
7484 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
7485 | sig_type->type_offset_in_section |
7486 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
7487 | } |
7488 | else | |
7489 | { | |
7490 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
7491 | dwo_abbrev_section, | |
43988095 | 7492 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 7493 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7494 | /* For DWOs coming from DWP files, we don't know the CU length |
7495 | until now. */ | |
7496 | dwo_unit->length = get_cu_length (&cu->header); | |
7497 | } | |
7498 | ||
02142a6c DE |
7499 | /* Replace the CU's original abbrev table with the DWO's. |
7500 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
7501 | if (abbrev_table_provided) |
7502 | { | |
7503 | /* Don't free the provided abbrev table, the caller of | |
7504 | init_cutu_and_read_dies owns it. */ | |
7505 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 7506 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
7507 | make_cleanup (dwarf2_free_abbrev_table, cu); |
7508 | } | |
7509 | else | |
7510 | { | |
7511 | dwarf2_free_abbrev_table (cu); | |
7512 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 7513 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
7514 | } |
7515 | ||
7516 | /* Read in the die, but leave space to copy over the attributes | |
7517 | from the stub. This has the benefit of simplifying the rest of | |
7518 | the code - all the work to maintain the illusion of a single | |
7519 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
7520 | num_extra_attrs = ((stmt_list != NULL) | |
7521 | + (low_pc != NULL) | |
7522 | + (high_pc != NULL) | |
7523 | + (ranges != NULL) | |
7524 | + (comp_dir != NULL)); | |
7525 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
7526 | result_has_children, num_extra_attrs); | |
7527 | ||
7528 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
7529 | comp_unit_die = *result_comp_unit_die; | |
7530 | i = comp_unit_die->num_attrs; | |
7531 | if (stmt_list != NULL) | |
7532 | comp_unit_die->attrs[i++] = *stmt_list; | |
7533 | if (low_pc != NULL) | |
7534 | comp_unit_die->attrs[i++] = *low_pc; | |
7535 | if (high_pc != NULL) | |
7536 | comp_unit_die->attrs[i++] = *high_pc; | |
7537 | if (ranges != NULL) | |
7538 | comp_unit_die->attrs[i++] = *ranges; | |
7539 | if (comp_dir != NULL) | |
7540 | comp_unit_die->attrs[i++] = *comp_dir; | |
7541 | comp_unit_die->num_attrs += num_extra_attrs; | |
7542 | ||
b4f54984 | 7543 | if (dwarf_die_debug) |
bf6af496 DE |
7544 | { |
7545 | fprintf_unfiltered (gdb_stdlog, | |
7546 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 7547 | get_section_name (section), |
bf6af496 DE |
7548 | (unsigned) (begin_info_ptr - section->buffer), |
7549 | bfd_get_filename (abfd)); | |
b4f54984 | 7550 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
7551 | } |
7552 | ||
a2ce51a0 DE |
7553 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
7554 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
7555 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
7556 | to get it via circuitous means. Blech. */ | |
7557 | if (comp_dir != NULL) | |
7558 | result_reader->comp_dir = DW_STRING (comp_dir); | |
7559 | ||
b0c7bfa9 DE |
7560 | /* Skip dummy compilation units. */ |
7561 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
7562 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
7563 | return 0; | |
7564 | ||
7565 | *result_info_ptr = info_ptr; | |
7566 | return 1; | |
7567 | } | |
7568 | ||
7569 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
7570 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 7571 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
7572 | |
7573 | static struct dwo_unit * | |
7574 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
7575 | struct die_info *comp_unit_die) | |
7576 | { | |
7577 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 DE |
7578 | ULONGEST signature; |
7579 | struct dwo_unit *dwo_unit; | |
7580 | const char *comp_dir, *dwo_name; | |
7581 | ||
a2ce51a0 DE |
7582 | gdb_assert (cu != NULL); |
7583 | ||
b0c7bfa9 | 7584 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
7585 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
7586 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
7587 | |
7588 | if (this_cu->is_debug_types) | |
7589 | { | |
7590 | struct signatured_type *sig_type; | |
7591 | ||
7592 | /* Since this_cu is the first member of struct signatured_type, | |
7593 | we can go from a pointer to one to a pointer to the other. */ | |
7594 | sig_type = (struct signatured_type *) this_cu; | |
7595 | signature = sig_type->signature; | |
7596 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
7597 | } | |
7598 | else | |
7599 | { | |
7600 | struct attribute *attr; | |
7601 | ||
7602 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
7603 | if (! attr) | |
7604 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
7605 | " [in module %s]"), | |
4262abfb | 7606 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
7607 | signature = DW_UNSND (attr); |
7608 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
7609 | signature); | |
7610 | } | |
7611 | ||
b0c7bfa9 DE |
7612 | return dwo_unit; |
7613 | } | |
7614 | ||
a2ce51a0 | 7615 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
7616 | See it for a description of the parameters. |
7617 | Read a TU directly from a DWO file, bypassing the stub. | |
7618 | ||
7619 | Note: This function could be a little bit simpler if we shared cleanups | |
7620 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
7621 | to do, so we keep this function self-contained. Or we could move this | |
7622 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
7623 | |
7624 | static void | |
6aa5f3a6 DE |
7625 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
7626 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
7627 | die_reader_func_ftype *die_reader_func, |
7628 | void *data) | |
7629 | { | |
7630 | struct dwarf2_cu *cu; | |
7631 | struct signatured_type *sig_type; | |
6aa5f3a6 | 7632 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
7633 | struct die_reader_specs reader; |
7634 | const gdb_byte *info_ptr; | |
7635 | struct die_info *comp_unit_die; | |
7636 | int has_children; | |
7637 | ||
7638 | /* Verify we can do the following downcast, and that we have the | |
7639 | data we need. */ | |
7640 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
7641 | sig_type = (struct signatured_type *) this_cu; | |
7642 | gdb_assert (sig_type->dwo_unit != NULL); | |
7643 | ||
7644 | cleanups = make_cleanup (null_cleanup, NULL); | |
7645 | ||
6aa5f3a6 DE |
7646 | if (use_existing_cu && this_cu->cu != NULL) |
7647 | { | |
7648 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
7649 | cu = this_cu->cu; | |
7650 | /* There's no need to do the rereading_dwo_cu handling that | |
7651 | init_cutu_and_read_dies does since we don't read the stub. */ | |
7652 | } | |
7653 | else | |
7654 | { | |
7655 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7656 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 7657 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
7658 | init_one_comp_unit (cu, this_cu); |
7659 | /* If an error occurs while loading, release our storage. */ | |
7660 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
7661 | } | |
7662 | ||
7663 | /* A future optimization, if needed, would be to use an existing | |
7664 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
7665 | could share abbrev tables. */ | |
a2ce51a0 DE |
7666 | |
7667 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
7668 | 0 /* abbrev_table_provided */, | |
7669 | NULL /* stub_comp_unit_die */, | |
7670 | sig_type->dwo_unit->dwo_file->comp_dir, | |
7671 | &reader, &info_ptr, | |
7672 | &comp_unit_die, &has_children) == 0) | |
7673 | { | |
7674 | /* Dummy die. */ | |
7675 | do_cleanups (cleanups); | |
7676 | return; | |
7677 | } | |
7678 | ||
7679 | /* All the "real" work is done here. */ | |
7680 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
7681 | ||
6aa5f3a6 | 7682 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
7683 | but the alternative is making the latter more complex. |
7684 | This function is only for the special case of using DWO files directly: | |
7685 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 7686 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 7687 | { |
6aa5f3a6 DE |
7688 | if (keep) |
7689 | { | |
7690 | /* We've successfully allocated this compilation unit. Let our | |
7691 | caller clean it up when finished with it. */ | |
7692 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 7693 | |
6aa5f3a6 DE |
7694 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
7695 | So we have to manually free the abbrev table. */ | |
7696 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 7697 | |
6aa5f3a6 DE |
7698 | /* Link this CU into read_in_chain. */ |
7699 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7700 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7701 | } | |
7702 | else | |
7703 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 7704 | } |
a2ce51a0 DE |
7705 | |
7706 | do_cleanups (cleanups); | |
7707 | } | |
7708 | ||
fd820528 | 7709 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 7710 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 7711 | |
f4dc4d17 DE |
7712 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
7713 | Otherwise the table specified in the comp unit header is read in and used. | |
7714 | This is an optimization for when we already have the abbrev table. | |
7715 | ||
dee91e82 DE |
7716 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
7717 | Otherwise, a new CU is allocated with xmalloc. | |
7718 | ||
7719 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
7720 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
7721 | ||
7722 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 7723 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 7724 | |
70221824 | 7725 | static void |
fd820528 | 7726 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 7727 | struct abbrev_table *abbrev_table, |
fd820528 DE |
7728 | int use_existing_cu, int keep, |
7729 | die_reader_func_ftype *die_reader_func, | |
7730 | void *data) | |
c906108c | 7731 | { |
dee91e82 | 7732 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7733 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7734 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 7735 | struct dwarf2_cu *cu; |
d521ce57 | 7736 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7737 | struct die_reader_specs reader; |
d85a05f0 | 7738 | struct die_info *comp_unit_die; |
dee91e82 | 7739 | int has_children; |
d85a05f0 | 7740 | struct attribute *attr; |
365156ad | 7741 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 7742 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 7743 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
7744 | /* Non-zero if CU currently points to a DWO file and we need to |
7745 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 7746 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 7747 | int rereading_dwo_cu = 0; |
c906108c | 7748 | |
b4f54984 | 7749 | if (dwarf_die_debug) |
09406207 DE |
7750 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
7751 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 7752 | to_underlying (this_cu->sect_off)); |
09406207 | 7753 | |
dee91e82 DE |
7754 | if (use_existing_cu) |
7755 | gdb_assert (keep); | |
23745b47 | 7756 | |
a2ce51a0 DE |
7757 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
7758 | file (instead of going through the stub), short-circuit all of this. */ | |
7759 | if (this_cu->reading_dwo_directly) | |
7760 | { | |
7761 | /* Narrow down the scope of possibilities to have to understand. */ | |
7762 | gdb_assert (this_cu->is_debug_types); | |
7763 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
7764 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
7765 | die_reader_func, data); | |
a2ce51a0 DE |
7766 | return; |
7767 | } | |
7768 | ||
dee91e82 DE |
7769 | cleanups = make_cleanup (null_cleanup, NULL); |
7770 | ||
7771 | /* This is cheap if the section is already read in. */ | |
7772 | dwarf2_read_section (objfile, section); | |
7773 | ||
9c541725 | 7774 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
7775 | |
7776 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
7777 | |
7778 | if (use_existing_cu && this_cu->cu != NULL) | |
7779 | { | |
7780 | cu = this_cu->cu; | |
42e7ad6c DE |
7781 | /* If this CU is from a DWO file we need to start over, we need to |
7782 | refetch the attributes from the skeleton CU. | |
7783 | This could be optimized by retrieving those attributes from when we | |
7784 | were here the first time: the previous comp_unit_die was stored in | |
7785 | comp_unit_obstack. But there's no data yet that we need this | |
7786 | optimization. */ | |
7787 | if (cu->dwo_unit != NULL) | |
7788 | rereading_dwo_cu = 1; | |
dee91e82 DE |
7789 | } |
7790 | else | |
7791 | { | |
7792 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7793 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 7794 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 7795 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 7796 | /* If an error occurs while loading, release our storage. */ |
365156ad | 7797 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 7798 | } |
dee91e82 | 7799 | |
b0c7bfa9 | 7800 | /* Get the header. */ |
9c541725 | 7801 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
7802 | { |
7803 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 7804 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
7805 | } |
7806 | else | |
7807 | { | |
3019eac3 | 7808 | if (this_cu->is_debug_types) |
dee91e82 | 7809 | { |
43988095 | 7810 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 7811 | abbrev_section, info_ptr, |
43988095 | 7812 | rcuh_kind::TYPE); |
dee91e82 | 7813 | |
42e7ad6c DE |
7814 | /* Since per_cu is the first member of struct signatured_type, |
7815 | we can go from a pointer to one to a pointer to the other. */ | |
7816 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 7817 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
7818 | gdb_assert (sig_type->type_offset_in_tu |
7819 | == cu->header.type_cu_offset_in_tu); | |
7820 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 7821 | |
42e7ad6c DE |
7822 | /* LENGTH has not been set yet for type units if we're |
7823 | using .gdb_index. */ | |
1ce1cefd | 7824 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
7825 | |
7826 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
7827 | sig_type->type_offset_in_section = |
7828 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
7829 | |
7830 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
7831 | } |
7832 | else | |
7833 | { | |
4bdcc0c1 DE |
7834 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
7835 | abbrev_section, | |
43988095 JK |
7836 | info_ptr, |
7837 | rcuh_kind::COMPILE); | |
dee91e82 | 7838 | |
9c541725 | 7839 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 7840 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 7841 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
7842 | } |
7843 | } | |
10b3939b | 7844 | |
6caca83c | 7845 | /* Skip dummy compilation units. */ |
dee91e82 | 7846 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
7847 | || peek_abbrev_code (abfd, info_ptr) == 0) |
7848 | { | |
dee91e82 | 7849 | do_cleanups (cleanups); |
21b2bd31 | 7850 | return; |
6caca83c CC |
7851 | } |
7852 | ||
433df2d4 DE |
7853 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
7854 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
7855 | done. Note that it's important that if the CU had an abbrev table |
7856 | on entry we don't free it when we're done: Somewhere up the call stack | |
7857 | it may be in use. */ | |
f4dc4d17 DE |
7858 | if (abbrev_table != NULL) |
7859 | { | |
7860 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 7861 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
7862 | cu->abbrev_table = abbrev_table; |
7863 | } | |
7864 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 7865 | { |
4bdcc0c1 | 7866 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
7867 | make_cleanup (dwarf2_free_abbrev_table, cu); |
7868 | } | |
42e7ad6c DE |
7869 | else if (rereading_dwo_cu) |
7870 | { | |
7871 | dwarf2_free_abbrev_table (cu); | |
7872 | dwarf2_read_abbrevs (cu, abbrev_section); | |
7873 | } | |
af703f96 | 7874 | |
dee91e82 | 7875 | /* Read the top level CU/TU die. */ |
3019eac3 | 7876 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 7877 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 7878 | |
b0c7bfa9 DE |
7879 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
7880 | from the DWO file. | |
7881 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
7882 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
7883 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
7884 | if (attr) | |
7885 | { | |
3019eac3 | 7886 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 7887 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
7888 | |
7889 | if (has_children) | |
6a506a2d DE |
7890 | { |
7891 | complaint (&symfile_complaints, | |
7892 | _("compilation unit with DW_AT_GNU_dwo_name" | |
7893 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 7894 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 7895 | } |
b0c7bfa9 | 7896 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 7897 | if (dwo_unit != NULL) |
3019eac3 | 7898 | { |
6a506a2d DE |
7899 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
7900 | abbrev_table != NULL, | |
a2ce51a0 | 7901 | comp_unit_die, NULL, |
6a506a2d DE |
7902 | &reader, &info_ptr, |
7903 | &dwo_comp_unit_die, &has_children) == 0) | |
7904 | { | |
7905 | /* Dummy die. */ | |
7906 | do_cleanups (cleanups); | |
7907 | return; | |
7908 | } | |
7909 | comp_unit_die = dwo_comp_unit_die; | |
7910 | } | |
7911 | else | |
7912 | { | |
7913 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
7914 | the stub. A complaint has already been logged. There's | |
7915 | not much more we can do except pass on the stub DIE to | |
7916 | die_reader_func. We don't want to throw an error on bad | |
7917 | debug info. */ | |
3019eac3 DE |
7918 | } |
7919 | } | |
7920 | ||
b0c7bfa9 | 7921 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
7922 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
7923 | ||
b0c7bfa9 | 7924 | /* Done, clean up. */ |
365156ad | 7925 | if (free_cu_cleanup != NULL) |
348e048f | 7926 | { |
365156ad TT |
7927 | if (keep) |
7928 | { | |
7929 | /* We've successfully allocated this compilation unit. Let our | |
7930 | caller clean it up when finished with it. */ | |
7931 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 7932 | |
365156ad TT |
7933 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
7934 | So we have to manually free the abbrev table. */ | |
7935 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 7936 | |
365156ad TT |
7937 | /* Link this CU into read_in_chain. */ |
7938 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7939 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7940 | } | |
7941 | else | |
7942 | do_cleanups (free_cu_cleanup); | |
348e048f | 7943 | } |
365156ad TT |
7944 | |
7945 | do_cleanups (cleanups); | |
dee91e82 DE |
7946 | } |
7947 | ||
33e80786 DE |
7948 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
7949 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
7950 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7951 | |
7952 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7953 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7954 | |
7955 | We fill in THIS_CU->length. | |
7956 | ||
7957 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
7958 | linker) then DIE_READER_FUNC will not get called. | |
7959 | ||
7960 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7961 | This is done in order to not leave THIS_CU->cu in a state where we have |
7962 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
7963 | |
7964 | static void | |
7965 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 7966 | struct dwo_file *dwo_file, |
dee91e82 DE |
7967 | die_reader_func_ftype *die_reader_func, |
7968 | void *data) | |
7969 | { | |
7970 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 7971 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7972 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 7973 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 7974 | struct dwarf2_cu cu; |
d521ce57 | 7975 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
7976 | struct die_reader_specs reader; |
7977 | struct cleanup *cleanups; | |
7978 | struct die_info *comp_unit_die; | |
7979 | int has_children; | |
7980 | ||
b4f54984 | 7981 | if (dwarf_die_debug) |
09406207 DE |
7982 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
7983 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 7984 | to_underlying (this_cu->sect_off)); |
09406207 | 7985 | |
dee91e82 DE |
7986 | gdb_assert (this_cu->cu == NULL); |
7987 | ||
33e80786 DE |
7988 | abbrev_section = (dwo_file != NULL |
7989 | ? &dwo_file->sections.abbrev | |
7990 | : get_abbrev_section_for_cu (this_cu)); | |
7991 | ||
dee91e82 DE |
7992 | /* This is cheap if the section is already read in. */ |
7993 | dwarf2_read_section (objfile, section); | |
7994 | ||
7995 | init_one_comp_unit (&cu, this_cu); | |
7996 | ||
7997 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
7998 | ||
9c541725 | 7999 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
8000 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
8001 | abbrev_section, info_ptr, | |
43988095 JK |
8002 | (this_cu->is_debug_types |
8003 | ? rcuh_kind::TYPE | |
8004 | : rcuh_kind::COMPILE)); | |
dee91e82 | 8005 | |
1ce1cefd | 8006 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
8007 | |
8008 | /* Skip dummy compilation units. */ | |
8009 | if (info_ptr >= begin_info_ptr + this_cu->length | |
8010 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 8011 | { |
dee91e82 | 8012 | do_cleanups (cleanups); |
21b2bd31 | 8013 | return; |
93311388 | 8014 | } |
72bf9492 | 8015 | |
dee91e82 DE |
8016 | dwarf2_read_abbrevs (&cu, abbrev_section); |
8017 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
8018 | ||
3019eac3 | 8019 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
8020 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
8021 | ||
8022 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
8023 | ||
8024 | do_cleanups (cleanups); | |
8025 | } | |
8026 | ||
3019eac3 DE |
8027 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
8028 | does not lookup the specified DWO file. | |
8029 | This cannot be used to read DWO files. | |
dee91e82 DE |
8030 | |
8031 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
8032 | This is done in order to not leave THIS_CU->cu in a state where we have |
8033 | to care whether it refers to the "main" CU or the DWO CU. | |
8034 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
8035 | |
8036 | static void | |
8037 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
8038 | die_reader_func_ftype *die_reader_func, | |
8039 | void *data) | |
8040 | { | |
33e80786 | 8041 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 8042 | } |
0018ea6f DE |
8043 | \f |
8044 | /* Type Unit Groups. | |
dee91e82 | 8045 | |
0018ea6f DE |
8046 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
8047 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
8048 | so that all types coming from the same compilation (.o file) are grouped | |
8049 | together. A future step could be to put the types in the same symtab as | |
8050 | the CU the types ultimately came from. */ | |
ff013f42 | 8051 | |
f4dc4d17 DE |
8052 | static hashval_t |
8053 | hash_type_unit_group (const void *item) | |
8054 | { | |
9a3c8263 SM |
8055 | const struct type_unit_group *tu_group |
8056 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 8057 | |
094b34ac | 8058 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 8059 | } |
348e048f DE |
8060 | |
8061 | static int | |
f4dc4d17 | 8062 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 8063 | { |
9a3c8263 SM |
8064 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
8065 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 8066 | |
094b34ac | 8067 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 8068 | } |
348e048f | 8069 | |
f4dc4d17 DE |
8070 | /* Allocate a hash table for type unit groups. */ |
8071 | ||
8072 | static htab_t | |
8073 | allocate_type_unit_groups_table (void) | |
8074 | { | |
8075 | return htab_create_alloc_ex (3, | |
8076 | hash_type_unit_group, | |
8077 | eq_type_unit_group, | |
8078 | NULL, | |
8079 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
8080 | hashtab_obstack_allocate, | |
8081 | dummy_obstack_deallocate); | |
8082 | } | |
dee91e82 | 8083 | |
f4dc4d17 DE |
8084 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
8085 | partial symtabs. We combine several TUs per psymtab to not let the size | |
8086 | of any one psymtab grow too big. */ | |
8087 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
8088 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 8089 | |
094b34ac | 8090 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
8091 | Create the type_unit_group object used to hold one or more TUs. */ |
8092 | ||
8093 | static struct type_unit_group * | |
094b34ac | 8094 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
8095 | { |
8096 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 8097 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 8098 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
8099 | |
8100 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
8101 | struct type_unit_group); | |
094b34ac | 8102 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 8103 | per_cu->objfile = objfile; |
f4dc4d17 | 8104 | |
094b34ac DE |
8105 | if (dwarf2_per_objfile->using_index) |
8106 | { | |
8107 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
8108 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
8109 | } |
8110 | else | |
8111 | { | |
9c541725 | 8112 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
8113 | struct partial_symtab *pst; |
8114 | char *name; | |
8115 | ||
8116 | /* Give the symtab a useful name for debug purposes. */ | |
8117 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
8118 | name = xstrprintf ("<type_units_%d>", | |
8119 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
8120 | else | |
8121 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
8122 | ||
8123 | pst = create_partial_symtab (per_cu, name); | |
8124 | pst->anonymous = 1; | |
f4dc4d17 | 8125 | |
094b34ac DE |
8126 | xfree (name); |
8127 | } | |
f4dc4d17 | 8128 | |
094b34ac | 8129 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 8130 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
8131 | |
8132 | return tu_group; | |
8133 | } | |
8134 | ||
094b34ac DE |
8135 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
8136 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
8137 | |
8138 | static struct type_unit_group * | |
ff39bb5e | 8139 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
8140 | { |
8141 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
8142 | struct type_unit_group *tu_group; | |
8143 | void **slot; | |
8144 | unsigned int line_offset; | |
8145 | struct type_unit_group type_unit_group_for_lookup; | |
8146 | ||
8147 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
8148 | { | |
8149 | dwarf2_per_objfile->type_unit_groups = | |
8150 | allocate_type_unit_groups_table (); | |
8151 | } | |
8152 | ||
8153 | /* Do we need to create a new group, or can we use an existing one? */ | |
8154 | ||
8155 | if (stmt_list) | |
8156 | { | |
8157 | line_offset = DW_UNSND (stmt_list); | |
8158 | ++tu_stats->nr_symtab_sharers; | |
8159 | } | |
8160 | else | |
8161 | { | |
8162 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
8163 | We can do various things here like create one group per TU or | |
8164 | spread them over multiple groups to split up the expansion work. | |
8165 | To avoid worst case scenarios (too many groups or too large groups) | |
8166 | we, umm, group them in bunches. */ | |
8167 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
8168 | | (tu_stats->nr_stmt_less_type_units | |
8169 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
8170 | ++tu_stats->nr_stmt_less_type_units; | |
8171 | } | |
8172 | ||
094b34ac | 8173 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 8174 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
8175 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
8176 | &type_unit_group_for_lookup, INSERT); | |
8177 | if (*slot != NULL) | |
8178 | { | |
9a3c8263 | 8179 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
8180 | gdb_assert (tu_group != NULL); |
8181 | } | |
8182 | else | |
8183 | { | |
9c541725 | 8184 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 8185 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
8186 | *slot = tu_group; |
8187 | ++tu_stats->nr_symtabs; | |
8188 | } | |
8189 | ||
8190 | return tu_group; | |
8191 | } | |
0018ea6f DE |
8192 | \f |
8193 | /* Partial symbol tables. */ | |
8194 | ||
8195 | /* Create a psymtab named NAME and assign it to PER_CU. | |
8196 | ||
8197 | The caller must fill in the following details: | |
8198 | dirname, textlow, texthigh. */ | |
8199 | ||
8200 | static struct partial_symtab * | |
8201 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
8202 | { | |
8203 | struct objfile *objfile = per_cu->objfile; | |
8204 | struct partial_symtab *pst; | |
8205 | ||
18a94d75 | 8206 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
8207 | objfile->global_psymbols, |
8208 | objfile->static_psymbols); | |
0018ea6f DE |
8209 | |
8210 | pst->psymtabs_addrmap_supported = 1; | |
8211 | ||
8212 | /* This is the glue that links PST into GDB's symbol API. */ | |
8213 | pst->read_symtab_private = per_cu; | |
8214 | pst->read_symtab = dwarf2_read_symtab; | |
8215 | per_cu->v.psymtab = pst; | |
8216 | ||
8217 | return pst; | |
8218 | } | |
8219 | ||
b93601f3 TT |
8220 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
8221 | type. */ | |
8222 | ||
8223 | struct process_psymtab_comp_unit_data | |
8224 | { | |
8225 | /* True if we are reading a DW_TAG_partial_unit. */ | |
8226 | ||
8227 | int want_partial_unit; | |
8228 | ||
8229 | /* The "pretend" language that is used if the CU doesn't declare a | |
8230 | language. */ | |
8231 | ||
8232 | enum language pretend_language; | |
8233 | }; | |
8234 | ||
0018ea6f DE |
8235 | /* die_reader_func for process_psymtab_comp_unit. */ |
8236 | ||
8237 | static void | |
8238 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8239 | const gdb_byte *info_ptr, |
0018ea6f DE |
8240 | struct die_info *comp_unit_die, |
8241 | int has_children, | |
8242 | void *data) | |
8243 | { | |
8244 | struct dwarf2_cu *cu = reader->cu; | |
8245 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 8246 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 8247 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
8248 | CORE_ADDR baseaddr; |
8249 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
8250 | struct partial_symtab *pst; | |
3a2b436a | 8251 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 8252 | const char *filename; |
9a3c8263 SM |
8253 | struct process_psymtab_comp_unit_data *info |
8254 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 8255 | |
b93601f3 | 8256 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
8257 | return; |
8258 | ||
8259 | gdb_assert (! per_cu->is_debug_types); | |
8260 | ||
b93601f3 | 8261 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
8262 | |
8263 | cu->list_in_scope = &file_symbols; | |
8264 | ||
8265 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
8266 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
8267 | if (filename == NULL) | |
0018ea6f | 8268 | filename = ""; |
0018ea6f DE |
8269 | |
8270 | pst = create_partial_symtab (per_cu, filename); | |
8271 | ||
8272 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 8273 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
8274 | |
8275 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8276 | ||
8277 | dwarf2_find_base_address (comp_unit_die, cu); | |
8278 | ||
8279 | /* Possibly set the default values of LOWPC and HIGHPC from | |
8280 | `DW_AT_ranges'. */ | |
3a2b436a JK |
8281 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
8282 | &best_highpc, cu, pst); | |
8283 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
8284 | /* Store the contiguous range if it is not empty; it can be empty for |
8285 | CUs with no code. */ | |
8286 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
8287 | gdbarch_adjust_dwarf2_addr (gdbarch, |
8288 | best_lowpc + baseaddr), | |
8289 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
8290 | best_highpc + baseaddr) - 1, | |
8291 | pst); | |
0018ea6f DE |
8292 | |
8293 | /* Check if comp unit has_children. | |
8294 | If so, read the rest of the partial symbols from this comp unit. | |
8295 | If not, there's no more debug_info for this comp unit. */ | |
8296 | if (has_children) | |
8297 | { | |
8298 | struct partial_die_info *first_die; | |
8299 | CORE_ADDR lowpc, highpc; | |
8300 | ||
8301 | lowpc = ((CORE_ADDR) -1); | |
8302 | highpc = ((CORE_ADDR) 0); | |
8303 | ||
8304 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8305 | ||
8306 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 8307 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
8308 | |
8309 | /* If we didn't find a lowpc, set it to highpc to avoid | |
8310 | complaints from `maint check'. */ | |
8311 | if (lowpc == ((CORE_ADDR) -1)) | |
8312 | lowpc = highpc; | |
8313 | ||
8314 | /* If the compilation unit didn't have an explicit address range, | |
8315 | then use the information extracted from its child dies. */ | |
e385593e | 8316 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
8317 | { |
8318 | best_lowpc = lowpc; | |
8319 | best_highpc = highpc; | |
8320 | } | |
8321 | } | |
3e29f34a MR |
8322 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
8323 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 8324 | |
8763cede | 8325 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
8326 | |
8327 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
8328 | { | |
8329 | int i; | |
8330 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
8331 | struct dwarf2_per_cu_data *iter; | |
8332 | ||
8333 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
8334 | post-pass. */ | |
8335 | pst->number_of_dependencies = len; | |
8d749320 SM |
8336 | pst->dependencies = |
8337 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
8338 | for (i = 0; |
8339 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
8340 | i, iter); | |
8341 | ++i) | |
8342 | pst->dependencies[i] = iter->v.psymtab; | |
8343 | ||
8344 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
8345 | } | |
8346 | ||
8347 | /* Get the list of files included in the current compilation unit, | |
8348 | and build a psymtab for each of them. */ | |
8349 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
8350 | ||
b4f54984 | 8351 | if (dwarf_read_debug) |
0018ea6f DE |
8352 | { |
8353 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
8354 | ||
8355 | fprintf_unfiltered (gdb_stdlog, | |
8356 | "Psymtab for %s unit @0x%x: %s - %s" | |
8357 | ", %d global, %d static syms\n", | |
8358 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 8359 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
8360 | paddress (gdbarch, pst->textlow), |
8361 | paddress (gdbarch, pst->texthigh), | |
8362 | pst->n_global_syms, pst->n_static_syms); | |
8363 | } | |
8364 | } | |
8365 | ||
8366 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8367 | Process compilation unit THIS_CU for a psymtab. */ | |
8368 | ||
8369 | static void | |
8370 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
8371 | int want_partial_unit, |
8372 | enum language pretend_language) | |
0018ea6f DE |
8373 | { |
8374 | /* If this compilation unit was already read in, free the | |
8375 | cached copy in order to read it in again. This is | |
8376 | necessary because we skipped some symbols when we first | |
8377 | read in the compilation unit (see load_partial_dies). | |
8378 | This problem could be avoided, but the benefit is unclear. */ | |
8379 | if (this_cu->cu != NULL) | |
8380 | free_one_cached_comp_unit (this_cu); | |
8381 | ||
f1902523 JK |
8382 | if (this_cu->is_debug_types) |
8383 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
8384 | NULL); | |
8385 | else | |
8386 | { | |
8387 | process_psymtab_comp_unit_data info; | |
8388 | info.want_partial_unit = want_partial_unit; | |
8389 | info.pretend_language = pretend_language; | |
8390 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
8391 | process_psymtab_comp_unit_reader, &info); | |
8392 | } | |
0018ea6f DE |
8393 | |
8394 | /* Age out any secondary CUs. */ | |
8395 | age_cached_comp_units (); | |
8396 | } | |
f4dc4d17 DE |
8397 | |
8398 | /* Reader function for build_type_psymtabs. */ | |
8399 | ||
8400 | static void | |
8401 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8402 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
8403 | struct die_info *type_unit_die, |
8404 | int has_children, | |
8405 | void *data) | |
8406 | { | |
8407 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8408 | struct dwarf2_cu *cu = reader->cu; | |
8409 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 8410 | struct signatured_type *sig_type; |
f4dc4d17 DE |
8411 | struct type_unit_group *tu_group; |
8412 | struct attribute *attr; | |
8413 | struct partial_die_info *first_die; | |
8414 | CORE_ADDR lowpc, highpc; | |
8415 | struct partial_symtab *pst; | |
8416 | ||
8417 | gdb_assert (data == NULL); | |
0186c6a7 DE |
8418 | gdb_assert (per_cu->is_debug_types); |
8419 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8420 | |
8421 | if (! has_children) | |
8422 | return; | |
8423 | ||
8424 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 8425 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 8426 | |
0186c6a7 | 8427 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
8428 | |
8429 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
8430 | cu->list_in_scope = &file_symbols; | |
8431 | pst = create_partial_symtab (per_cu, ""); | |
8432 | pst->anonymous = 1; | |
8433 | ||
8434 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8435 | ||
8436 | lowpc = (CORE_ADDR) -1; | |
8437 | highpc = (CORE_ADDR) 0; | |
8438 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
8439 | ||
8763cede | 8440 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
8441 | } |
8442 | ||
73051182 DE |
8443 | /* Struct used to sort TUs by their abbreviation table offset. */ |
8444 | ||
8445 | struct tu_abbrev_offset | |
8446 | { | |
8447 | struct signatured_type *sig_type; | |
8448 | sect_offset abbrev_offset; | |
8449 | }; | |
8450 | ||
8451 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
8452 | ||
8453 | static int | |
8454 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
8455 | { | |
9a3c8263 SM |
8456 | const struct tu_abbrev_offset * const *a |
8457 | = (const struct tu_abbrev_offset * const*) ap; | |
8458 | const struct tu_abbrev_offset * const *b | |
8459 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
8460 | sect_offset aoff = (*a)->abbrev_offset; |
8461 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
8462 | |
8463 | return (aoff > boff) - (aoff < boff); | |
8464 | } | |
8465 | ||
8466 | /* Efficiently read all the type units. | |
8467 | This does the bulk of the work for build_type_psymtabs. | |
8468 | ||
8469 | The efficiency is because we sort TUs by the abbrev table they use and | |
8470 | only read each abbrev table once. In one program there are 200K TUs | |
8471 | sharing 8K abbrev tables. | |
8472 | ||
8473 | The main purpose of this function is to support building the | |
8474 | dwarf2_per_objfile->type_unit_groups table. | |
8475 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
8476 | can collapse the search space by grouping them by stmt_list. | |
8477 | The savings can be significant, in the same program from above the 200K TUs | |
8478 | share 8K stmt_list tables. | |
8479 | ||
8480 | FUNC is expected to call get_type_unit_group, which will create the | |
8481 | struct type_unit_group if necessary and add it to | |
8482 | dwarf2_per_objfile->type_unit_groups. */ | |
8483 | ||
8484 | static void | |
8485 | build_type_psymtabs_1 (void) | |
8486 | { | |
73051182 DE |
8487 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
8488 | struct cleanup *cleanups; | |
8489 | struct abbrev_table *abbrev_table; | |
8490 | sect_offset abbrev_offset; | |
8491 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
8492 | int i; |
8493 | ||
8494 | /* It's up to the caller to not call us multiple times. */ | |
8495 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
8496 | ||
8497 | if (dwarf2_per_objfile->n_type_units == 0) | |
8498 | return; | |
8499 | ||
8500 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
8501 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
8502 | read each abbrev table in. | |
8503 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
8504 | This is simpler and efficient enough for now. | |
8505 | ||
8506 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
8507 | symtab to use). Typically TUs with the same abbrev offset have the same | |
8508 | stmt_list value too so in practice this should work well. | |
8509 | ||
8510 | The basic algorithm here is: | |
8511 | ||
8512 | sort TUs by abbrev table | |
8513 | for each TU with same abbrev table: | |
8514 | read abbrev table if first user | |
8515 | read TU top level DIE | |
8516 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
8517 | call FUNC */ | |
8518 | ||
b4f54984 | 8519 | if (dwarf_read_debug) |
73051182 DE |
8520 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
8521 | ||
8522 | /* Sort in a separate table to maintain the order of all_type_units | |
8523 | for .gdb_index: TU indices directly index all_type_units. */ | |
8524 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
8525 | dwarf2_per_objfile->n_type_units); | |
8526 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
8527 | { | |
8528 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
8529 | ||
8530 | sorted_by_abbrev[i].sig_type = sig_type; | |
8531 | sorted_by_abbrev[i].abbrev_offset = | |
8532 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 8533 | sig_type->per_cu.sect_off); |
73051182 DE |
8534 | } |
8535 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
8536 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
8537 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
8538 | ||
9c541725 | 8539 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
8540 | abbrev_table = NULL; |
8541 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
8542 | ||
8543 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
8544 | { | |
8545 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
8546 | ||
8547 | /* Switch to the next abbrev table if necessary. */ | |
8548 | if (abbrev_table == NULL | |
9c541725 | 8549 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
8550 | { |
8551 | if (abbrev_table != NULL) | |
8552 | { | |
8553 | abbrev_table_free (abbrev_table); | |
8554 | /* Reset to NULL in case abbrev_table_read_table throws | |
8555 | an error: abbrev_table_free_cleanup will get called. */ | |
8556 | abbrev_table = NULL; | |
8557 | } | |
8558 | abbrev_offset = tu->abbrev_offset; | |
8559 | abbrev_table = | |
8560 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
8561 | abbrev_offset); | |
8562 | ++tu_stats->nr_uniq_abbrev_tables; | |
8563 | } | |
8564 | ||
8565 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
8566 | build_type_psymtabs_reader, NULL); | |
8567 | } | |
8568 | ||
73051182 | 8569 | do_cleanups (cleanups); |
6aa5f3a6 | 8570 | } |
73051182 | 8571 | |
6aa5f3a6 DE |
8572 | /* Print collected type unit statistics. */ |
8573 | ||
8574 | static void | |
8575 | print_tu_stats (void) | |
8576 | { | |
8577 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
8578 | ||
8579 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
8580 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
8581 | dwarf2_per_objfile->n_type_units); | |
8582 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
8583 | tu_stats->nr_uniq_abbrev_tables); | |
8584 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
8585 | tu_stats->nr_symtabs); | |
8586 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
8587 | tu_stats->nr_symtab_sharers); | |
8588 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
8589 | tu_stats->nr_stmt_less_type_units); | |
8590 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
8591 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
8592 | } |
8593 | ||
f4dc4d17 DE |
8594 | /* Traversal function for build_type_psymtabs. */ |
8595 | ||
8596 | static int | |
8597 | build_type_psymtab_dependencies (void **slot, void *info) | |
8598 | { | |
8599 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8600 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 8601 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 8602 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
8603 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
8604 | struct signatured_type *iter; | |
f4dc4d17 DE |
8605 | int i; |
8606 | ||
8607 | gdb_assert (len > 0); | |
0186c6a7 | 8608 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
8609 | |
8610 | pst->number_of_dependencies = len; | |
8d749320 SM |
8611 | pst->dependencies = |
8612 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 8613 | for (i = 0; |
0186c6a7 | 8614 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
8615 | ++i) |
8616 | { | |
0186c6a7 DE |
8617 | gdb_assert (iter->per_cu.is_debug_types); |
8618 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 8619 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
8620 | } |
8621 | ||
0186c6a7 | 8622 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
8623 | |
8624 | return 1; | |
8625 | } | |
8626 | ||
8627 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8628 | Build partial symbol tables for the .debug_types comp-units. */ | |
8629 | ||
8630 | static void | |
8631 | build_type_psymtabs (struct objfile *objfile) | |
8632 | { | |
0e50663e | 8633 | if (! create_all_type_units (objfile)) |
348e048f DE |
8634 | return; |
8635 | ||
73051182 | 8636 | build_type_psymtabs_1 (); |
6aa5f3a6 | 8637 | } |
f4dc4d17 | 8638 | |
6aa5f3a6 DE |
8639 | /* Traversal function for process_skeletonless_type_unit. |
8640 | Read a TU in a DWO file and build partial symbols for it. */ | |
8641 | ||
8642 | static int | |
8643 | process_skeletonless_type_unit (void **slot, void *info) | |
8644 | { | |
8645 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 8646 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
8647 | struct signatured_type find_entry, *entry; |
8648 | ||
8649 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
8650 | ||
8651 | if (dwarf2_per_objfile->signatured_types == NULL) | |
8652 | { | |
8653 | dwarf2_per_objfile->signatured_types | |
8654 | = allocate_signatured_type_table (objfile); | |
8655 | } | |
8656 | ||
8657 | find_entry.signature = dwo_unit->signature; | |
8658 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
8659 | INSERT); | |
8660 | /* If we've already seen this type there's nothing to do. What's happening | |
8661 | is we're doing our own version of comdat-folding here. */ | |
8662 | if (*slot != NULL) | |
8663 | return 1; | |
8664 | ||
8665 | /* This does the job that create_all_type_units would have done for | |
8666 | this TU. */ | |
8667 | entry = add_type_unit (dwo_unit->signature, slot); | |
8668 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
8669 | *slot = entry; | |
8670 | ||
8671 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
8672 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
8673 | build_type_psymtabs_reader, NULL); | |
8674 | ||
8675 | return 1; | |
8676 | } | |
8677 | ||
8678 | /* Traversal function for process_skeletonless_type_units. */ | |
8679 | ||
8680 | static int | |
8681 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
8682 | { | |
8683 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
8684 | ||
8685 | if (dwo_file->tus != NULL) | |
8686 | { | |
8687 | htab_traverse_noresize (dwo_file->tus, | |
8688 | process_skeletonless_type_unit, info); | |
8689 | } | |
8690 | ||
8691 | return 1; | |
8692 | } | |
8693 | ||
8694 | /* Scan all TUs of DWO files, verifying we've processed them. | |
8695 | This is needed in case a TU was emitted without its skeleton. | |
8696 | Note: This can't be done until we know what all the DWO files are. */ | |
8697 | ||
8698 | static void | |
8699 | process_skeletonless_type_units (struct objfile *objfile) | |
8700 | { | |
8701 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
8702 | if (get_dwp_file () == NULL | |
8703 | && dwarf2_per_objfile->dwo_files != NULL) | |
8704 | { | |
8705 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
8706 | process_dwo_file_for_skeletonless_type_units, | |
8707 | objfile); | |
8708 | } | |
348e048f DE |
8709 | } |
8710 | ||
95554aad TT |
8711 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
8712 | ||
8713 | static void | |
8714 | set_partial_user (struct objfile *objfile) | |
8715 | { | |
8716 | int i; | |
8717 | ||
8718 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
8719 | { | |
8832e7e3 | 8720 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
8721 | struct partial_symtab *pst = per_cu->v.psymtab; |
8722 | int j; | |
8723 | ||
36586728 TT |
8724 | if (pst == NULL) |
8725 | continue; | |
8726 | ||
95554aad TT |
8727 | for (j = 0; j < pst->number_of_dependencies; ++j) |
8728 | { | |
8729 | /* Set the 'user' field only if it is not already set. */ | |
8730 | if (pst->dependencies[j]->user == NULL) | |
8731 | pst->dependencies[j]->user = pst; | |
8732 | } | |
8733 | } | |
8734 | } | |
8735 | ||
93311388 DE |
8736 | /* Build the partial symbol table by doing a quick pass through the |
8737 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 8738 | |
93311388 | 8739 | static void |
c67a9c90 | 8740 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 8741 | { |
791afaa2 | 8742 | struct cleanup *back_to; |
21b2bd31 | 8743 | int i; |
93311388 | 8744 | |
b4f54984 | 8745 | if (dwarf_read_debug) |
45cfd468 DE |
8746 | { |
8747 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 8748 | objfile_name (objfile)); |
45cfd468 DE |
8749 | } |
8750 | ||
98bfdba5 PA |
8751 | dwarf2_per_objfile->reading_partial_symbols = 1; |
8752 | ||
be391dca | 8753 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 8754 | |
93311388 DE |
8755 | /* Any cached compilation units will be linked by the per-objfile |
8756 | read_in_chain. Make sure to free them when we're done. */ | |
8757 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 8758 | |
348e048f DE |
8759 | build_type_psymtabs (objfile); |
8760 | ||
93311388 | 8761 | create_all_comp_units (objfile); |
c906108c | 8762 | |
60606b2c TT |
8763 | /* Create a temporary address map on a temporary obstack. We later |
8764 | copy this to the final obstack. */ | |
8268c778 | 8765 | auto_obstack temp_obstack; |
791afaa2 TT |
8766 | |
8767 | scoped_restore save_psymtabs_addrmap | |
8768 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
8769 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 8770 | |
21b2bd31 | 8771 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 8772 | { |
8832e7e3 | 8773 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 8774 | |
b93601f3 | 8775 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 8776 | } |
ff013f42 | 8777 | |
6aa5f3a6 DE |
8778 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
8779 | process_skeletonless_type_units (objfile); | |
8780 | ||
8781 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
8782 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
8783 | { | |
8784 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
8785 | build_type_psymtab_dependencies, NULL); | |
8786 | } | |
8787 | ||
b4f54984 | 8788 | if (dwarf_read_debug) |
6aa5f3a6 DE |
8789 | print_tu_stats (); |
8790 | ||
95554aad TT |
8791 | set_partial_user (objfile); |
8792 | ||
ff013f42 JK |
8793 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
8794 | &objfile->objfile_obstack); | |
791afaa2 TT |
8795 | /* At this point we want to keep the address map. */ |
8796 | save_psymtabs_addrmap.release (); | |
ff013f42 | 8797 | |
ae038cb0 | 8798 | do_cleanups (back_to); |
45cfd468 | 8799 | |
b4f54984 | 8800 | if (dwarf_read_debug) |
45cfd468 | 8801 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 8802 | objfile_name (objfile)); |
ae038cb0 DJ |
8803 | } |
8804 | ||
3019eac3 | 8805 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
8806 | |
8807 | static void | |
dee91e82 | 8808 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 8809 | const gdb_byte *info_ptr, |
dee91e82 DE |
8810 | struct die_info *comp_unit_die, |
8811 | int has_children, | |
8812 | void *data) | |
ae038cb0 | 8813 | { |
dee91e82 | 8814 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 8815 | |
95554aad | 8816 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 8817 | |
ae038cb0 DJ |
8818 | /* Check if comp unit has_children. |
8819 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 8820 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 8821 | if (has_children) |
dee91e82 DE |
8822 | load_partial_dies (reader, info_ptr, 0); |
8823 | } | |
98bfdba5 | 8824 | |
dee91e82 DE |
8825 | /* Load the partial DIEs for a secondary CU into memory. |
8826 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 8827 | |
dee91e82 DE |
8828 | static void |
8829 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
8830 | { | |
f4dc4d17 DE |
8831 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8832 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
8833 | } |
8834 | ||
ae038cb0 | 8835 | static void |
36586728 TT |
8836 | read_comp_units_from_section (struct objfile *objfile, |
8837 | struct dwarf2_section_info *section, | |
f1902523 | 8838 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
8839 | unsigned int is_dwz, |
8840 | int *n_allocated, | |
8841 | int *n_comp_units, | |
8842 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 8843 | { |
d521ce57 | 8844 | const gdb_byte *info_ptr; |
be391dca | 8845 | |
b4f54984 | 8846 | if (dwarf_read_debug) |
bf6af496 | 8847 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
8848 | get_section_name (section), |
8849 | get_section_file_name (section)); | |
bf6af496 | 8850 | |
36586728 | 8851 | dwarf2_read_section (objfile, section); |
ae038cb0 | 8852 | |
36586728 | 8853 | info_ptr = section->buffer; |
6e70227d | 8854 | |
36586728 | 8855 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 8856 | { |
ae038cb0 | 8857 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 8858 | |
9c541725 | 8859 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 8860 | |
f1902523 JK |
8861 | comp_unit_head cu_header; |
8862 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
8863 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
8864 | |
8865 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
8866 | if (cu_header.unit_type != DW_UT_type) |
8867 | { | |
8868 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
8869 | struct dwarf2_per_cu_data); | |
8870 | memset (this_cu, 0, sizeof (*this_cu)); | |
8871 | } | |
8872 | else | |
8873 | { | |
8874 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
8875 | struct signatured_type); | |
8876 | memset (sig_type, 0, sizeof (*sig_type)); | |
8877 | sig_type->signature = cu_header.signature; | |
8878 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
8879 | this_cu = &sig_type->per_cu; | |
8880 | } | |
8881 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 8882 | this_cu->sect_off = sect_off; |
f1902523 | 8883 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 8884 | this_cu->is_dwz = is_dwz; |
9291a0cd | 8885 | this_cu->objfile = objfile; |
8a0459fd | 8886 | this_cu->section = section; |
ae038cb0 | 8887 | |
36586728 | 8888 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 8889 | { |
36586728 | 8890 | *n_allocated *= 2; |
224c3ddb SM |
8891 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
8892 | *all_comp_units, *n_allocated); | |
ae038cb0 | 8893 | } |
36586728 TT |
8894 | (*all_comp_units)[*n_comp_units] = this_cu; |
8895 | ++*n_comp_units; | |
ae038cb0 DJ |
8896 | |
8897 | info_ptr = info_ptr + this_cu->length; | |
8898 | } | |
36586728 TT |
8899 | } |
8900 | ||
8901 | /* Create a list of all compilation units in OBJFILE. | |
8902 | This is only done for -readnow and building partial symtabs. */ | |
8903 | ||
8904 | static void | |
8905 | create_all_comp_units (struct objfile *objfile) | |
8906 | { | |
8907 | int n_allocated; | |
8908 | int n_comp_units; | |
8909 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 8910 | struct dwz_file *dwz; |
36586728 TT |
8911 | |
8912 | n_comp_units = 0; | |
8913 | n_allocated = 10; | |
8d749320 | 8914 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 8915 | |
f1902523 JK |
8916 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
8917 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
8918 | &n_allocated, &n_comp_units, &all_comp_units); |
8919 | ||
4db1a1dc TT |
8920 | dwz = dwarf2_get_dwz_file (); |
8921 | if (dwz != NULL) | |
f1902523 | 8922 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
8923 | &n_allocated, &n_comp_units, |
8924 | &all_comp_units); | |
ae038cb0 | 8925 | |
8d749320 SM |
8926 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
8927 | struct dwarf2_per_cu_data *, | |
8928 | n_comp_units); | |
ae038cb0 DJ |
8929 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
8930 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
8931 | xfree (all_comp_units); | |
8932 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
8933 | } |
8934 | ||
5734ee8b | 8935 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 8936 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 8937 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
8938 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
8939 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 8940 | |
72bf9492 DJ |
8941 | static void |
8942 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
8943 | CORE_ADDR *highpc, int set_addrmap, |
8944 | struct dwarf2_cu *cu) | |
c906108c | 8945 | { |
72bf9492 | 8946 | struct partial_die_info *pdi; |
c906108c | 8947 | |
91c24f0a DC |
8948 | /* Now, march along the PDI's, descending into ones which have |
8949 | interesting children but skipping the children of the other ones, | |
8950 | until we reach the end of the compilation unit. */ | |
c906108c | 8951 | |
72bf9492 | 8952 | pdi = first_die; |
91c24f0a | 8953 | |
72bf9492 DJ |
8954 | while (pdi != NULL) |
8955 | { | |
8956 | fixup_partial_die (pdi, cu); | |
c906108c | 8957 | |
f55ee35c | 8958 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
8959 | children, so we need to look at them. Ditto for anonymous |
8960 | enums. */ | |
933c6fe4 | 8961 | |
72bf9492 | 8962 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
8963 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
8964 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 8965 | { |
72bf9492 | 8966 | switch (pdi->tag) |
c906108c SS |
8967 | { |
8968 | case DW_TAG_subprogram: | |
cdc07690 | 8969 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 8970 | break; |
72929c62 | 8971 | case DW_TAG_constant: |
c906108c SS |
8972 | case DW_TAG_variable: |
8973 | case DW_TAG_typedef: | |
91c24f0a | 8974 | case DW_TAG_union_type: |
72bf9492 | 8975 | if (!pdi->is_declaration) |
63d06c5c | 8976 | { |
72bf9492 | 8977 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
8978 | } |
8979 | break; | |
c906108c | 8980 | case DW_TAG_class_type: |
680b30c7 | 8981 | case DW_TAG_interface_type: |
c906108c | 8982 | case DW_TAG_structure_type: |
72bf9492 | 8983 | if (!pdi->is_declaration) |
c906108c | 8984 | { |
72bf9492 | 8985 | add_partial_symbol (pdi, cu); |
c906108c | 8986 | } |
e98c9e7c TT |
8987 | if (cu->language == language_rust && pdi->has_children) |
8988 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
8989 | set_addrmap, cu); | |
c906108c | 8990 | break; |
91c24f0a | 8991 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
8992 | if (!pdi->is_declaration) |
8993 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
8994 | break; |
8995 | case DW_TAG_base_type: | |
a02abb62 | 8996 | case DW_TAG_subrange_type: |
c906108c | 8997 | /* File scope base type definitions are added to the partial |
c5aa993b | 8998 | symbol table. */ |
72bf9492 | 8999 | add_partial_symbol (pdi, cu); |
c906108c | 9000 | break; |
d9fa45fe | 9001 | case DW_TAG_namespace: |
cdc07690 | 9002 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 9003 | break; |
5d7cb8df | 9004 | case DW_TAG_module: |
cdc07690 | 9005 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 9006 | break; |
95554aad TT |
9007 | case DW_TAG_imported_unit: |
9008 | { | |
9009 | struct dwarf2_per_cu_data *per_cu; | |
9010 | ||
f4dc4d17 DE |
9011 | /* For now we don't handle imported units in type units. */ |
9012 | if (cu->per_cu->is_debug_types) | |
9013 | { | |
9014 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9015 | " supported in type units [in module %s]"), | |
4262abfb | 9016 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
9017 | } |
9018 | ||
9c541725 | 9019 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 9020 | pdi->is_dwz, |
95554aad TT |
9021 | cu->objfile); |
9022 | ||
9023 | /* Go read the partial unit, if needed. */ | |
9024 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 9025 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 9026 | |
f4dc4d17 | 9027 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 9028 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
9029 | } |
9030 | break; | |
74921315 KS |
9031 | case DW_TAG_imported_declaration: |
9032 | add_partial_symbol (pdi, cu); | |
9033 | break; | |
c906108c SS |
9034 | default: |
9035 | break; | |
9036 | } | |
9037 | } | |
9038 | ||
72bf9492 DJ |
9039 | /* If the die has a sibling, skip to the sibling. */ |
9040 | ||
9041 | pdi = pdi->die_sibling; | |
9042 | } | |
9043 | } | |
9044 | ||
9045 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 9046 | |
72bf9492 | 9047 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 9048 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
9049 | Enumerators are an exception; they use the scope of their parent |
9050 | enumeration type, i.e. the name of the enumeration type is not | |
9051 | prepended to the enumerator. | |
91c24f0a | 9052 | |
72bf9492 DJ |
9053 | There are two complexities. One is DW_AT_specification; in this |
9054 | case "parent" means the parent of the target of the specification, | |
9055 | instead of the direct parent of the DIE. The other is compilers | |
9056 | which do not emit DW_TAG_namespace; in this case we try to guess | |
9057 | the fully qualified name of structure types from their members' | |
9058 | linkage names. This must be done using the DIE's children rather | |
9059 | than the children of any DW_AT_specification target. We only need | |
9060 | to do this for structures at the top level, i.e. if the target of | |
9061 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
9062 | have a parent. */ | |
9063 | ||
9064 | /* Compute the scope prefix associated with PDI's parent, in | |
9065 | compilation unit CU. The result will be allocated on CU's | |
9066 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
9067 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 9068 | static const char * |
72bf9492 DJ |
9069 | partial_die_parent_scope (struct partial_die_info *pdi, |
9070 | struct dwarf2_cu *cu) | |
9071 | { | |
15d034d0 | 9072 | const char *grandparent_scope; |
72bf9492 | 9073 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 9074 | |
72bf9492 DJ |
9075 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
9076 | then this means the parent of the specification DIE. */ | |
9077 | ||
9078 | real_pdi = pdi; | |
72bf9492 | 9079 | while (real_pdi->has_specification) |
36586728 TT |
9080 | real_pdi = find_partial_die (real_pdi->spec_offset, |
9081 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
9082 | |
9083 | parent = real_pdi->die_parent; | |
9084 | if (parent == NULL) | |
9085 | return NULL; | |
9086 | ||
9087 | if (parent->scope_set) | |
9088 | return parent->scope; | |
9089 | ||
9090 | fixup_partial_die (parent, cu); | |
9091 | ||
10b3939b | 9092 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 9093 | |
acebe513 UW |
9094 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
9095 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
9096 | Work around this problem here. */ | |
9097 | if (cu->language == language_cplus | |
6e70227d | 9098 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
9099 | && strcmp (parent->name, "::") == 0 |
9100 | && grandparent_scope == NULL) | |
9101 | { | |
9102 | parent->scope = NULL; | |
9103 | parent->scope_set = 1; | |
9104 | return NULL; | |
9105 | } | |
9106 | ||
9c6c53f7 SA |
9107 | if (pdi->tag == DW_TAG_enumerator) |
9108 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
9109 | parent->scope = grandparent_scope; | |
9110 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 9111 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
9112 | || parent->tag == DW_TAG_structure_type |
9113 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 9114 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
9115 | || parent->tag == DW_TAG_union_type |
9116 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
9117 | { |
9118 | if (grandparent_scope == NULL) | |
9119 | parent->scope = parent->name; | |
9120 | else | |
3e43a32a MS |
9121 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
9122 | grandparent_scope, | |
f55ee35c | 9123 | parent->name, 0, cu); |
72bf9492 | 9124 | } |
72bf9492 DJ |
9125 | else |
9126 | { | |
9127 | /* FIXME drow/2004-04-01: What should we be doing with | |
9128 | function-local names? For partial symbols, we should probably be | |
9129 | ignoring them. */ | |
9130 | complaint (&symfile_complaints, | |
e2e0b3e5 | 9131 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 9132 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 9133 | parent->scope = grandparent_scope; |
c906108c SS |
9134 | } |
9135 | ||
72bf9492 DJ |
9136 | parent->scope_set = 1; |
9137 | return parent->scope; | |
9138 | } | |
9139 | ||
9140 | /* Return the fully scoped name associated with PDI, from compilation unit | |
9141 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 9142 | |
72bf9492 DJ |
9143 | static char * |
9144 | partial_die_full_name (struct partial_die_info *pdi, | |
9145 | struct dwarf2_cu *cu) | |
9146 | { | |
15d034d0 | 9147 | const char *parent_scope; |
72bf9492 | 9148 | |
98bfdba5 PA |
9149 | /* If this is a template instantiation, we can not work out the |
9150 | template arguments from partial DIEs. So, unfortunately, we have | |
9151 | to go through the full DIEs. At least any work we do building | |
9152 | types here will be reused if full symbols are loaded later. */ | |
9153 | if (pdi->has_template_arguments) | |
9154 | { | |
9155 | fixup_partial_die (pdi, cu); | |
9156 | ||
9157 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
9158 | { | |
9159 | struct die_info *die; | |
9160 | struct attribute attr; | |
9161 | struct dwarf2_cu *ref_cu = cu; | |
9162 | ||
b64f50a1 | 9163 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 9164 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 9165 | attr.form = DW_FORM_ref_addr; |
9c541725 | 9166 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
9167 | die = follow_die_ref (NULL, &attr, &ref_cu); |
9168 | ||
9169 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
9170 | } | |
9171 | } | |
9172 | ||
72bf9492 DJ |
9173 | parent_scope = partial_die_parent_scope (pdi, cu); |
9174 | if (parent_scope == NULL) | |
9175 | return NULL; | |
9176 | else | |
f55ee35c | 9177 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
9178 | } |
9179 | ||
9180 | static void | |
72bf9492 | 9181 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 9182 | { |
e7c27a73 | 9183 | struct objfile *objfile = cu->objfile; |
3e29f34a | 9184 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 9185 | CORE_ADDR addr = 0; |
15d034d0 | 9186 | const char *actual_name = NULL; |
e142c38c | 9187 | CORE_ADDR baseaddr; |
15d034d0 | 9188 | char *built_actual_name; |
e142c38c DJ |
9189 | |
9190 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 9191 | |
15d034d0 TT |
9192 | built_actual_name = partial_die_full_name (pdi, cu); |
9193 | if (built_actual_name != NULL) | |
9194 | actual_name = built_actual_name; | |
63d06c5c | 9195 | |
72bf9492 DJ |
9196 | if (actual_name == NULL) |
9197 | actual_name = pdi->name; | |
9198 | ||
c906108c SS |
9199 | switch (pdi->tag) |
9200 | { | |
9201 | case DW_TAG_subprogram: | |
3e29f34a | 9202 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 9203 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 9204 | { |
2cfa0c8d JB |
9205 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
9206 | of the global scope. But in Ada, we want to be able to access | |
9207 | nested procedures globally. So all Ada subprograms are stored | |
9208 | in the global scope. */ | |
f47fb265 | 9209 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9210 | built_actual_name != NULL, |
f47fb265 MS |
9211 | VAR_DOMAIN, LOC_BLOCK, |
9212 | &objfile->global_psymbols, | |
1762568f | 9213 | addr, cu->language, objfile); |
c906108c SS |
9214 | } |
9215 | else | |
9216 | { | |
f47fb265 | 9217 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9218 | built_actual_name != NULL, |
f47fb265 MS |
9219 | VAR_DOMAIN, LOC_BLOCK, |
9220 | &objfile->static_psymbols, | |
1762568f | 9221 | addr, cu->language, objfile); |
c906108c | 9222 | } |
0c1b455e TT |
9223 | |
9224 | if (pdi->main_subprogram && actual_name != NULL) | |
9225 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 9226 | break; |
72929c62 JB |
9227 | case DW_TAG_constant: |
9228 | { | |
af5bf4ad | 9229 | std::vector<partial_symbol *> *list; |
72929c62 JB |
9230 | |
9231 | if (pdi->is_external) | |
9232 | list = &objfile->global_psymbols; | |
9233 | else | |
9234 | list = &objfile->static_psymbols; | |
f47fb265 | 9235 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9236 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 9237 | list, 0, cu->language, objfile); |
72929c62 JB |
9238 | } |
9239 | break; | |
c906108c | 9240 | case DW_TAG_variable: |
95554aad TT |
9241 | if (pdi->d.locdesc) |
9242 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 9243 | |
95554aad | 9244 | if (pdi->d.locdesc |
caac4577 JG |
9245 | && addr == 0 |
9246 | && !dwarf2_per_objfile->has_section_at_zero) | |
9247 | { | |
9248 | /* A global or static variable may also have been stripped | |
9249 | out by the linker if unused, in which case its address | |
9250 | will be nullified; do not add such variables into partial | |
9251 | symbol table then. */ | |
9252 | } | |
9253 | else if (pdi->is_external) | |
c906108c SS |
9254 | { |
9255 | /* Global Variable. | |
9256 | Don't enter into the minimal symbol tables as there is | |
9257 | a minimal symbol table entry from the ELF symbols already. | |
9258 | Enter into partial symbol table if it has a location | |
9259 | descriptor or a type. | |
9260 | If the location descriptor is missing, new_symbol will create | |
9261 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
9262 | be determined from the minimal symbol table whenever the variable | |
9263 | is referenced. | |
9264 | The address for the partial symbol table entry is not | |
9265 | used by GDB, but it comes in handy for debugging partial symbol | |
9266 | table building. */ | |
9267 | ||
95554aad | 9268 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 9269 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9270 | built_actual_name != NULL, |
f47fb265 MS |
9271 | VAR_DOMAIN, LOC_STATIC, |
9272 | &objfile->global_psymbols, | |
1762568f | 9273 | addr + baseaddr, |
f47fb265 | 9274 | cu->language, objfile); |
c906108c SS |
9275 | } |
9276 | else | |
9277 | { | |
ff908ebf AW |
9278 | int has_loc = pdi->d.locdesc != NULL; |
9279 | ||
9280 | /* Static Variable. Skip symbols whose value we cannot know (those | |
9281 | without location descriptors or constant values). */ | |
9282 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 9283 | { |
15d034d0 | 9284 | xfree (built_actual_name); |
decbce07 MS |
9285 | return; |
9286 | } | |
ff908ebf | 9287 | |
f47fb265 | 9288 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9289 | built_actual_name != NULL, |
f47fb265 MS |
9290 | VAR_DOMAIN, LOC_STATIC, |
9291 | &objfile->static_psymbols, | |
ff908ebf | 9292 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 9293 | cu->language, objfile); |
c906108c SS |
9294 | } |
9295 | break; | |
9296 | case DW_TAG_typedef: | |
9297 | case DW_TAG_base_type: | |
a02abb62 | 9298 | case DW_TAG_subrange_type: |
38d518c9 | 9299 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9300 | built_actual_name != NULL, |
176620f1 | 9301 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 9302 | &objfile->static_psymbols, |
1762568f | 9303 | 0, cu->language, objfile); |
c906108c | 9304 | break; |
74921315 | 9305 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
9306 | case DW_TAG_namespace: |
9307 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 9308 | built_actual_name != NULL, |
72bf9492 DJ |
9309 | VAR_DOMAIN, LOC_TYPEDEF, |
9310 | &objfile->global_psymbols, | |
1762568f | 9311 | 0, cu->language, objfile); |
72bf9492 | 9312 | break; |
530e8392 KB |
9313 | case DW_TAG_module: |
9314 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
9315 | built_actual_name != NULL, | |
9316 | MODULE_DOMAIN, LOC_TYPEDEF, | |
9317 | &objfile->global_psymbols, | |
1762568f | 9318 | 0, cu->language, objfile); |
530e8392 | 9319 | break; |
c906108c | 9320 | case DW_TAG_class_type: |
680b30c7 | 9321 | case DW_TAG_interface_type: |
c906108c SS |
9322 | case DW_TAG_structure_type: |
9323 | case DW_TAG_union_type: | |
9324 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
9325 | /* Skip external references. The DWARF standard says in the section |
9326 | about "Structure, Union, and Class Type Entries": "An incomplete | |
9327 | structure, union or class type is represented by a structure, | |
9328 | union or class entry that does not have a byte size attribute | |
9329 | and that has a DW_AT_declaration attribute." */ | |
9330 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 9331 | { |
15d034d0 | 9332 | xfree (built_actual_name); |
decbce07 MS |
9333 | return; |
9334 | } | |
fa4028e9 | 9335 | |
63d06c5c DC |
9336 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
9337 | static vs. global. */ | |
38d518c9 | 9338 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9339 | built_actual_name != NULL, |
176620f1 | 9340 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 9341 | cu->language == language_cplus |
63d06c5c DC |
9342 | ? &objfile->global_psymbols |
9343 | : &objfile->static_psymbols, | |
1762568f | 9344 | 0, cu->language, objfile); |
c906108c | 9345 | |
c906108c SS |
9346 | break; |
9347 | case DW_TAG_enumerator: | |
38d518c9 | 9348 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9349 | built_actual_name != NULL, |
176620f1 | 9350 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 9351 | cu->language == language_cplus |
f6fe98ef DJ |
9352 | ? &objfile->global_psymbols |
9353 | : &objfile->static_psymbols, | |
1762568f | 9354 | 0, cu->language, objfile); |
c906108c SS |
9355 | break; |
9356 | default: | |
9357 | break; | |
9358 | } | |
5c4e30ca | 9359 | |
15d034d0 | 9360 | xfree (built_actual_name); |
c906108c SS |
9361 | } |
9362 | ||
5c4e30ca DC |
9363 | /* Read a partial die corresponding to a namespace; also, add a symbol |
9364 | corresponding to that namespace to the symbol table. NAMESPACE is | |
9365 | the name of the enclosing namespace. */ | |
91c24f0a | 9366 | |
72bf9492 DJ |
9367 | static void |
9368 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 9369 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 9370 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 9371 | { |
72bf9492 | 9372 | /* Add a symbol for the namespace. */ |
e7c27a73 | 9373 | |
72bf9492 | 9374 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
9375 | |
9376 | /* Now scan partial symbols in that namespace. */ | |
9377 | ||
91c24f0a | 9378 | if (pdi->has_children) |
cdc07690 | 9379 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
9380 | } |
9381 | ||
5d7cb8df JK |
9382 | /* Read a partial die corresponding to a Fortran module. */ |
9383 | ||
9384 | static void | |
9385 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 9386 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 9387 | { |
530e8392 KB |
9388 | /* Add a symbol for the namespace. */ |
9389 | ||
9390 | add_partial_symbol (pdi, cu); | |
9391 | ||
f55ee35c | 9392 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
9393 | |
9394 | if (pdi->has_children) | |
cdc07690 | 9395 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
9396 | } |
9397 | ||
bc30ff58 JB |
9398 | /* Read a partial die corresponding to a subprogram and create a partial |
9399 | symbol for that subprogram. When the CU language allows it, this | |
9400 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 9401 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
9402 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
9403 | and highest PC values found in PDI. | |
6e70227d | 9404 | |
cdc07690 YQ |
9405 | PDI may also be a lexical block, in which case we simply search |
9406 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
9407 | Again, this is only performed when the CU language allows this |
9408 | type of definitions. */ | |
9409 | ||
9410 | static void | |
9411 | add_partial_subprogram (struct partial_die_info *pdi, | |
9412 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 9413 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
9414 | { |
9415 | if (pdi->tag == DW_TAG_subprogram) | |
9416 | { | |
9417 | if (pdi->has_pc_info) | |
9418 | { | |
9419 | if (pdi->lowpc < *lowpc) | |
9420 | *lowpc = pdi->lowpc; | |
9421 | if (pdi->highpc > *highpc) | |
9422 | *highpc = pdi->highpc; | |
cdc07690 | 9423 | if (set_addrmap) |
5734ee8b | 9424 | { |
5734ee8b | 9425 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
9426 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9427 | CORE_ADDR baseaddr; | |
9428 | CORE_ADDR highpc; | |
9429 | CORE_ADDR lowpc; | |
5734ee8b DJ |
9430 | |
9431 | baseaddr = ANOFFSET (objfile->section_offsets, | |
9432 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
9433 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
9434 | pdi->lowpc + baseaddr); | |
9435 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
9436 | pdi->highpc + baseaddr); | |
9437 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 9438 | cu->per_cu->v.psymtab); |
5734ee8b | 9439 | } |
481860b3 GB |
9440 | } |
9441 | ||
9442 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
9443 | { | |
bc30ff58 | 9444 | if (!pdi->is_declaration) |
e8d05480 JB |
9445 | /* Ignore subprogram DIEs that do not have a name, they are |
9446 | illegal. Do not emit a complaint at this point, we will | |
9447 | do so when we convert this psymtab into a symtab. */ | |
9448 | if (pdi->name) | |
9449 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
9450 | } |
9451 | } | |
6e70227d | 9452 | |
bc30ff58 JB |
9453 | if (! pdi->has_children) |
9454 | return; | |
9455 | ||
9456 | if (cu->language == language_ada) | |
9457 | { | |
9458 | pdi = pdi->die_child; | |
9459 | while (pdi != NULL) | |
9460 | { | |
9461 | fixup_partial_die (pdi, cu); | |
9462 | if (pdi->tag == DW_TAG_subprogram | |
9463 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 9464 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
9465 | pdi = pdi->die_sibling; |
9466 | } | |
9467 | } | |
9468 | } | |
9469 | ||
91c24f0a DC |
9470 | /* Read a partial die corresponding to an enumeration type. */ |
9471 | ||
72bf9492 DJ |
9472 | static void |
9473 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
9474 | struct dwarf2_cu *cu) | |
91c24f0a | 9475 | { |
72bf9492 | 9476 | struct partial_die_info *pdi; |
91c24f0a DC |
9477 | |
9478 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
9479 | add_partial_symbol (enum_pdi, cu); |
9480 | ||
9481 | pdi = enum_pdi->die_child; | |
9482 | while (pdi) | |
91c24f0a | 9483 | { |
72bf9492 | 9484 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 9485 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 9486 | else |
72bf9492 DJ |
9487 | add_partial_symbol (pdi, cu); |
9488 | pdi = pdi->die_sibling; | |
91c24f0a | 9489 | } |
91c24f0a DC |
9490 | } |
9491 | ||
6caca83c CC |
9492 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
9493 | ||
9494 | static unsigned int | |
d521ce57 | 9495 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
9496 | { |
9497 | unsigned int bytes_read; | |
9498 | ||
9499 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9500 | } | |
9501 | ||
4bb7a0a7 DJ |
9502 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
9503 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
9504 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
9505 | the initial number. */ | |
9506 | ||
9507 | static struct abbrev_info * | |
d521ce57 | 9508 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 9509 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
9510 | { |
9511 | bfd *abfd = cu->objfile->obfd; | |
9512 | unsigned int abbrev_number; | |
9513 | struct abbrev_info *abbrev; | |
9514 | ||
9515 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
9516 | ||
9517 | if (abbrev_number == 0) | |
9518 | return NULL; | |
9519 | ||
433df2d4 | 9520 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
9521 | if (!abbrev) |
9522 | { | |
422b9917 DE |
9523 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9524 | " at offset 0x%x [in module %s]"), | |
9525 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 9526 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
9527 | } |
9528 | ||
9529 | return abbrev; | |
9530 | } | |
9531 | ||
93311388 DE |
9532 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9533 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
9534 | DIE. Any children of the skipped DIEs will also be skipped. */ |
9535 | ||
d521ce57 TT |
9536 | static const gdb_byte * |
9537 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 9538 | { |
dee91e82 | 9539 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
9540 | struct abbrev_info *abbrev; |
9541 | unsigned int bytes_read; | |
9542 | ||
9543 | while (1) | |
9544 | { | |
9545 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
9546 | if (abbrev == NULL) | |
9547 | return info_ptr + bytes_read; | |
9548 | else | |
dee91e82 | 9549 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
9550 | } |
9551 | } | |
9552 | ||
93311388 DE |
9553 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9554 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
9555 | abbrev corresponding to that skipped uleb128 should be passed in |
9556 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
9557 | children. */ | |
9558 | ||
d521ce57 TT |
9559 | static const gdb_byte * |
9560 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 9561 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
9562 | { |
9563 | unsigned int bytes_read; | |
9564 | struct attribute attr; | |
dee91e82 DE |
9565 | bfd *abfd = reader->abfd; |
9566 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 9567 | const gdb_byte *buffer = reader->buffer; |
f664829e | 9568 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
9569 | unsigned int form, i; |
9570 | ||
9571 | for (i = 0; i < abbrev->num_attrs; i++) | |
9572 | { | |
9573 | /* The only abbrev we care about is DW_AT_sibling. */ | |
9574 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
9575 | { | |
dee91e82 | 9576 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 9577 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
9578 | complaint (&symfile_complaints, |
9579 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 9580 | else |
b9502d3f | 9581 | { |
9c541725 PA |
9582 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
9583 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
9584 | |
9585 | if (sibling_ptr < info_ptr) | |
9586 | complaint (&symfile_complaints, | |
9587 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
9588 | else if (sibling_ptr > reader->buffer_end) |
9589 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
9590 | else |
9591 | return sibling_ptr; | |
9592 | } | |
4bb7a0a7 DJ |
9593 | } |
9594 | ||
9595 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
9596 | form = abbrev->attrs[i].form; | |
9597 | skip_attribute: | |
9598 | switch (form) | |
9599 | { | |
4bb7a0a7 | 9600 | case DW_FORM_ref_addr: |
ae411497 TT |
9601 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
9602 | and later it is offset sized. */ | |
9603 | if (cu->header.version == 2) | |
9604 | info_ptr += cu->header.addr_size; | |
9605 | else | |
9606 | info_ptr += cu->header.offset_size; | |
9607 | break; | |
36586728 TT |
9608 | case DW_FORM_GNU_ref_alt: |
9609 | info_ptr += cu->header.offset_size; | |
9610 | break; | |
ae411497 | 9611 | case DW_FORM_addr: |
4bb7a0a7 DJ |
9612 | info_ptr += cu->header.addr_size; |
9613 | break; | |
9614 | case DW_FORM_data1: | |
9615 | case DW_FORM_ref1: | |
9616 | case DW_FORM_flag: | |
9617 | info_ptr += 1; | |
9618 | break; | |
2dc7f7b3 | 9619 | case DW_FORM_flag_present: |
43988095 | 9620 | case DW_FORM_implicit_const: |
2dc7f7b3 | 9621 | break; |
4bb7a0a7 DJ |
9622 | case DW_FORM_data2: |
9623 | case DW_FORM_ref2: | |
9624 | info_ptr += 2; | |
9625 | break; | |
9626 | case DW_FORM_data4: | |
9627 | case DW_FORM_ref4: | |
9628 | info_ptr += 4; | |
9629 | break; | |
9630 | case DW_FORM_data8: | |
9631 | case DW_FORM_ref8: | |
55f1336d | 9632 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
9633 | info_ptr += 8; |
9634 | break; | |
0224619f JK |
9635 | case DW_FORM_data16: |
9636 | info_ptr += 16; | |
9637 | break; | |
4bb7a0a7 | 9638 | case DW_FORM_string: |
9b1c24c8 | 9639 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
9640 | info_ptr += bytes_read; |
9641 | break; | |
2dc7f7b3 | 9642 | case DW_FORM_sec_offset: |
4bb7a0a7 | 9643 | case DW_FORM_strp: |
36586728 | 9644 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
9645 | info_ptr += cu->header.offset_size; |
9646 | break; | |
2dc7f7b3 | 9647 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
9648 | case DW_FORM_block: |
9649 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9650 | info_ptr += bytes_read; | |
9651 | break; | |
9652 | case DW_FORM_block1: | |
9653 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
9654 | break; | |
9655 | case DW_FORM_block2: | |
9656 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
9657 | break; | |
9658 | case DW_FORM_block4: | |
9659 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
9660 | break; | |
9661 | case DW_FORM_sdata: | |
9662 | case DW_FORM_udata: | |
9663 | case DW_FORM_ref_udata: | |
3019eac3 DE |
9664 | case DW_FORM_GNU_addr_index: |
9665 | case DW_FORM_GNU_str_index: | |
d521ce57 | 9666 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
9667 | break; |
9668 | case DW_FORM_indirect: | |
9669 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9670 | info_ptr += bytes_read; | |
9671 | /* We need to continue parsing from here, so just go back to | |
9672 | the top. */ | |
9673 | goto skip_attribute; | |
9674 | ||
9675 | default: | |
3e43a32a MS |
9676 | error (_("Dwarf Error: Cannot handle %s " |
9677 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
9678 | dwarf_form_name (form), |
9679 | bfd_get_filename (abfd)); | |
9680 | } | |
9681 | } | |
9682 | ||
9683 | if (abbrev->has_children) | |
dee91e82 | 9684 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
9685 | else |
9686 | return info_ptr; | |
9687 | } | |
9688 | ||
93311388 | 9689 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 9690 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 9691 | |
d521ce57 | 9692 | static const gdb_byte * |
dee91e82 DE |
9693 | locate_pdi_sibling (const struct die_reader_specs *reader, |
9694 | struct partial_die_info *orig_pdi, | |
d521ce57 | 9695 | const gdb_byte *info_ptr) |
91c24f0a DC |
9696 | { |
9697 | /* Do we know the sibling already? */ | |
72bf9492 | 9698 | |
91c24f0a DC |
9699 | if (orig_pdi->sibling) |
9700 | return orig_pdi->sibling; | |
9701 | ||
9702 | /* Are there any children to deal with? */ | |
9703 | ||
9704 | if (!orig_pdi->has_children) | |
9705 | return info_ptr; | |
9706 | ||
4bb7a0a7 | 9707 | /* Skip the children the long way. */ |
91c24f0a | 9708 | |
dee91e82 | 9709 | return skip_children (reader, info_ptr); |
91c24f0a DC |
9710 | } |
9711 | ||
257e7a09 | 9712 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 9713 | not NULL. */ |
c906108c SS |
9714 | |
9715 | static void | |
257e7a09 YQ |
9716 | dwarf2_read_symtab (struct partial_symtab *self, |
9717 | struct objfile *objfile) | |
c906108c | 9718 | { |
257e7a09 | 9719 | if (self->readin) |
c906108c | 9720 | { |
442e4d9c | 9721 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 9722 | self->filename); |
442e4d9c YQ |
9723 | } |
9724 | else | |
9725 | { | |
9726 | if (info_verbose) | |
c906108c | 9727 | { |
442e4d9c | 9728 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 9729 | self->filename); |
442e4d9c | 9730 | gdb_flush (gdb_stdout); |
c906108c | 9731 | } |
c906108c | 9732 | |
442e4d9c | 9733 | /* Restore our global data. */ |
9a3c8263 SM |
9734 | dwarf2_per_objfile |
9735 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
9736 | dwarf2_objfile_data_key); | |
10b3939b | 9737 | |
442e4d9c YQ |
9738 | /* If this psymtab is constructed from a debug-only objfile, the |
9739 | has_section_at_zero flag will not necessarily be correct. We | |
9740 | can get the correct value for this flag by looking at the data | |
9741 | associated with the (presumably stripped) associated objfile. */ | |
9742 | if (objfile->separate_debug_objfile_backlink) | |
9743 | { | |
9744 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
9745 | = ((struct dwarf2_per_objfile *) |
9746 | objfile_data (objfile->separate_debug_objfile_backlink, | |
9747 | dwarf2_objfile_data_key)); | |
9a619af0 | 9748 | |
442e4d9c YQ |
9749 | dwarf2_per_objfile->has_section_at_zero |
9750 | = dpo_backlink->has_section_at_zero; | |
9751 | } | |
b2ab525c | 9752 | |
442e4d9c | 9753 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 9754 | |
257e7a09 | 9755 | psymtab_to_symtab_1 (self); |
c906108c | 9756 | |
442e4d9c YQ |
9757 | /* Finish up the debug error message. */ |
9758 | if (info_verbose) | |
9759 | printf_filtered (_("done.\n")); | |
c906108c | 9760 | } |
95554aad TT |
9761 | |
9762 | process_cu_includes (); | |
c906108c | 9763 | } |
9cdd5dbd DE |
9764 | \f |
9765 | /* Reading in full CUs. */ | |
c906108c | 9766 | |
10b3939b DJ |
9767 | /* Add PER_CU to the queue. */ |
9768 | ||
9769 | static void | |
95554aad TT |
9770 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9771 | enum language pretend_language) | |
10b3939b DJ |
9772 | { |
9773 | struct dwarf2_queue_item *item; | |
9774 | ||
9775 | per_cu->queued = 1; | |
8d749320 | 9776 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 9777 | item->per_cu = per_cu; |
95554aad | 9778 | item->pretend_language = pretend_language; |
10b3939b DJ |
9779 | item->next = NULL; |
9780 | ||
9781 | if (dwarf2_queue == NULL) | |
9782 | dwarf2_queue = item; | |
9783 | else | |
9784 | dwarf2_queue_tail->next = item; | |
9785 | ||
9786 | dwarf2_queue_tail = item; | |
9787 | } | |
9788 | ||
89e63ee4 DE |
9789 | /* If PER_CU is not yet queued, add it to the queue. |
9790 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
9791 | dependency. | |
0907af0c | 9792 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
9793 | meaning either PER_CU is already queued or it is already loaded. |
9794 | ||
9795 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
9796 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
9797 | |
9798 | static int | |
89e63ee4 | 9799 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
9800 | struct dwarf2_per_cu_data *per_cu, |
9801 | enum language pretend_language) | |
9802 | { | |
9803 | /* We may arrive here during partial symbol reading, if we need full | |
9804 | DIEs to process an unusual case (e.g. template arguments). Do | |
9805 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
9806 | if (dwarf2_per_objfile->reading_partial_symbols) | |
9807 | { | |
9808 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
9809 | return 1; | |
9810 | return 0; | |
9811 | } | |
9812 | ||
9813 | /* Mark the dependence relation so that we don't flush PER_CU | |
9814 | too early. */ | |
89e63ee4 DE |
9815 | if (dependent_cu != NULL) |
9816 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
9817 | |
9818 | /* If it's already on the queue, we have nothing to do. */ | |
9819 | if (per_cu->queued) | |
9820 | return 0; | |
9821 | ||
9822 | /* If the compilation unit is already loaded, just mark it as | |
9823 | used. */ | |
9824 | if (per_cu->cu != NULL) | |
9825 | { | |
9826 | per_cu->cu->last_used = 0; | |
9827 | return 0; | |
9828 | } | |
9829 | ||
9830 | /* Add it to the queue. */ | |
9831 | queue_comp_unit (per_cu, pretend_language); | |
9832 | ||
9833 | return 1; | |
9834 | } | |
9835 | ||
10b3939b DJ |
9836 | /* Process the queue. */ |
9837 | ||
9838 | static void | |
a0f42c21 | 9839 | process_queue (void) |
10b3939b DJ |
9840 | { |
9841 | struct dwarf2_queue_item *item, *next_item; | |
9842 | ||
b4f54984 | 9843 | if (dwarf_read_debug) |
45cfd468 DE |
9844 | { |
9845 | fprintf_unfiltered (gdb_stdlog, | |
9846 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 9847 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
9848 | } |
9849 | ||
03dd20cc DJ |
9850 | /* The queue starts out with one item, but following a DIE reference |
9851 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
9852 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
9853 | { | |
cc12ce38 DE |
9854 | if ((dwarf2_per_objfile->using_index |
9855 | ? !item->per_cu->v.quick->compunit_symtab | |
9856 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
9857 | /* Skip dummy CUs. */ | |
9858 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
9859 | { |
9860 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 9861 | unsigned int debug_print_threshold; |
247f5c4f | 9862 | char buf[100]; |
f4dc4d17 | 9863 | |
247f5c4f | 9864 | if (per_cu->is_debug_types) |
f4dc4d17 | 9865 | { |
247f5c4f DE |
9866 | struct signatured_type *sig_type = |
9867 | (struct signatured_type *) per_cu; | |
9868 | ||
9869 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 9870 | hex_string (sig_type->signature), |
9c541725 | 9871 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
9872 | /* There can be 100s of TUs. |
9873 | Only print them in verbose mode. */ | |
9874 | debug_print_threshold = 2; | |
f4dc4d17 | 9875 | } |
247f5c4f | 9876 | else |
73be47f5 | 9877 | { |
9c541725 PA |
9878 | sprintf (buf, "CU at offset 0x%x", |
9879 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
9880 | debug_print_threshold = 1; |
9881 | } | |
247f5c4f | 9882 | |
b4f54984 | 9883 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9884 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
9885 | |
9886 | if (per_cu->is_debug_types) | |
9887 | process_full_type_unit (per_cu, item->pretend_language); | |
9888 | else | |
9889 | process_full_comp_unit (per_cu, item->pretend_language); | |
9890 | ||
b4f54984 | 9891 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9892 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 9893 | } |
10b3939b DJ |
9894 | |
9895 | item->per_cu->queued = 0; | |
9896 | next_item = item->next; | |
9897 | xfree (item); | |
9898 | } | |
9899 | ||
9900 | dwarf2_queue_tail = NULL; | |
45cfd468 | 9901 | |
b4f54984 | 9902 | if (dwarf_read_debug) |
45cfd468 DE |
9903 | { |
9904 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 9905 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 9906 | } |
10b3939b DJ |
9907 | } |
9908 | ||
9909 | /* Free all allocated queue entries. This function only releases anything if | |
9910 | an error was thrown; if the queue was processed then it would have been | |
9911 | freed as we went along. */ | |
9912 | ||
9913 | static void | |
9914 | dwarf2_release_queue (void *dummy) | |
9915 | { | |
9916 | struct dwarf2_queue_item *item, *last; | |
9917 | ||
9918 | item = dwarf2_queue; | |
9919 | while (item) | |
9920 | { | |
9921 | /* Anything still marked queued is likely to be in an | |
9922 | inconsistent state, so discard it. */ | |
9923 | if (item->per_cu->queued) | |
9924 | { | |
9925 | if (item->per_cu->cu != NULL) | |
dee91e82 | 9926 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
9927 | item->per_cu->queued = 0; |
9928 | } | |
9929 | ||
9930 | last = item; | |
9931 | item = item->next; | |
9932 | xfree (last); | |
9933 | } | |
9934 | ||
9935 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
9936 | } | |
9937 | ||
9938 | /* Read in full symbols for PST, and anything it depends on. */ | |
9939 | ||
c906108c | 9940 | static void |
fba45db2 | 9941 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 9942 | { |
10b3939b | 9943 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
9944 | int i; |
9945 | ||
95554aad TT |
9946 | if (pst->readin) |
9947 | return; | |
9948 | ||
aaa75496 | 9949 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
9950 | if (!pst->dependencies[i]->readin |
9951 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
9952 | { |
9953 | /* Inform about additional files that need to be read in. */ | |
9954 | if (info_verbose) | |
9955 | { | |
a3f17187 | 9956 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
9957 | fputs_filtered (" ", gdb_stdout); |
9958 | wrap_here (""); | |
9959 | fputs_filtered ("and ", gdb_stdout); | |
9960 | wrap_here (""); | |
9961 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 9962 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
9963 | gdb_flush (gdb_stdout); |
9964 | } | |
9965 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
9966 | } | |
9967 | ||
9a3c8263 | 9968 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
9969 | |
9970 | if (per_cu == NULL) | |
aaa75496 JB |
9971 | { |
9972 | /* It's an include file, no symbols to read for it. | |
9973 | Everything is in the parent symtab. */ | |
9974 | pst->readin = 1; | |
9975 | return; | |
9976 | } | |
c906108c | 9977 | |
a0f42c21 | 9978 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
9979 | } |
9980 | ||
dee91e82 DE |
9981 | /* Trivial hash function for die_info: the hash value of a DIE |
9982 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 9983 | |
dee91e82 DE |
9984 | static hashval_t |
9985 | die_hash (const void *item) | |
10b3939b | 9986 | { |
9a3c8263 | 9987 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 9988 | |
9c541725 | 9989 | return to_underlying (die->sect_off); |
dee91e82 | 9990 | } |
63d06c5c | 9991 | |
dee91e82 DE |
9992 | /* Trivial comparison function for die_info structures: two DIEs |
9993 | are equal if they have the same offset. */ | |
98bfdba5 | 9994 | |
dee91e82 DE |
9995 | static int |
9996 | die_eq (const void *item_lhs, const void *item_rhs) | |
9997 | { | |
9a3c8263 SM |
9998 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
9999 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 10000 | |
9c541725 | 10001 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 10002 | } |
c906108c | 10003 | |
dee91e82 DE |
10004 | /* die_reader_func for load_full_comp_unit. |
10005 | This is identical to read_signatured_type_reader, | |
10006 | but is kept separate for now. */ | |
c906108c | 10007 | |
dee91e82 DE |
10008 | static void |
10009 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 10010 | const gdb_byte *info_ptr, |
dee91e82 DE |
10011 | struct die_info *comp_unit_die, |
10012 | int has_children, | |
10013 | void *data) | |
10014 | { | |
10015 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 10016 | enum language *language_ptr = (enum language *) data; |
6caca83c | 10017 | |
dee91e82 DE |
10018 | gdb_assert (cu->die_hash == NULL); |
10019 | cu->die_hash = | |
10020 | htab_create_alloc_ex (cu->header.length / 12, | |
10021 | die_hash, | |
10022 | die_eq, | |
10023 | NULL, | |
10024 | &cu->comp_unit_obstack, | |
10025 | hashtab_obstack_allocate, | |
10026 | dummy_obstack_deallocate); | |
e142c38c | 10027 | |
dee91e82 DE |
10028 | if (has_children) |
10029 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
10030 | &info_ptr, comp_unit_die); | |
10031 | cu->dies = comp_unit_die; | |
10032 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
10033 | |
10034 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 10035 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 10036 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
10037 | or we won't be able to build types correctly. |
10038 | Similarly, if we do not read the producer, we can not apply | |
10039 | producer-specific interpretation. */ | |
95554aad | 10040 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 10041 | } |
10b3939b | 10042 | |
dee91e82 | 10043 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 10044 | |
dee91e82 | 10045 | static void |
95554aad TT |
10046 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
10047 | enum language pretend_language) | |
dee91e82 | 10048 | { |
3019eac3 | 10049 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 10050 | |
f4dc4d17 DE |
10051 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
10052 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
10053 | } |
10054 | ||
3da10d80 KS |
10055 | /* Add a DIE to the delayed physname list. */ |
10056 | ||
10057 | static void | |
10058 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
10059 | const char *name, struct die_info *die, | |
10060 | struct dwarf2_cu *cu) | |
10061 | { | |
10062 | struct delayed_method_info mi; | |
10063 | mi.type = type; | |
10064 | mi.fnfield_index = fnfield_index; | |
10065 | mi.index = index; | |
10066 | mi.name = name; | |
10067 | mi.die = die; | |
10068 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
10069 | } | |
10070 | ||
10071 | /* A cleanup for freeing the delayed method list. */ | |
10072 | ||
10073 | static void | |
10074 | free_delayed_list (void *ptr) | |
10075 | { | |
10076 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
10077 | if (cu->method_list != NULL) | |
10078 | { | |
10079 | VEC_free (delayed_method_info, cu->method_list); | |
10080 | cu->method_list = NULL; | |
10081 | } | |
10082 | } | |
10083 | ||
3693fdb3 PA |
10084 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
10085 | "const" / "volatile". If so, decrements LEN by the length of the | |
10086 | modifier and return true. Otherwise return false. */ | |
10087 | ||
10088 | template<size_t N> | |
10089 | static bool | |
10090 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
10091 | { | |
10092 | size_t mod_len = sizeof (mod) - 1; | |
10093 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
10094 | { | |
10095 | len -= mod_len; | |
10096 | return true; | |
10097 | } | |
10098 | return false; | |
10099 | } | |
10100 | ||
3da10d80 KS |
10101 | /* Compute the physnames of any methods on the CU's method list. |
10102 | ||
10103 | The computation of method physnames is delayed in order to avoid the | |
10104 | (bad) condition that one of the method's formal parameters is of an as yet | |
10105 | incomplete type. */ | |
10106 | ||
10107 | static void | |
10108 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
10109 | { | |
10110 | int i; | |
10111 | struct delayed_method_info *mi; | |
3693fdb3 PA |
10112 | |
10113 | /* Only C++ delays computing physnames. */ | |
10114 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
10115 | return; | |
10116 | gdb_assert (cu->language == language_cplus); | |
10117 | ||
3da10d80 KS |
10118 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
10119 | { | |
1d06ead6 | 10120 | const char *physname; |
3da10d80 KS |
10121 | struct fn_fieldlist *fn_flp |
10122 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 10123 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
10124 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
10125 | = physname ? physname : ""; | |
3693fdb3 PA |
10126 | |
10127 | /* Since there's no tag to indicate whether a method is a | |
10128 | const/volatile overload, extract that information out of the | |
10129 | demangled name. */ | |
10130 | if (physname != NULL) | |
10131 | { | |
10132 | size_t len = strlen (physname); | |
10133 | ||
10134 | while (1) | |
10135 | { | |
10136 | if (physname[len] == ')') /* shortcut */ | |
10137 | break; | |
10138 | else if (check_modifier (physname, len, " const")) | |
10139 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
10140 | else if (check_modifier (physname, len, " volatile")) | |
10141 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
10142 | else | |
10143 | break; | |
10144 | } | |
10145 | } | |
3da10d80 KS |
10146 | } |
10147 | } | |
10148 | ||
a766d390 DE |
10149 | /* Go objects should be embedded in a DW_TAG_module DIE, |
10150 | and it's not clear if/how imported objects will appear. | |
10151 | To keep Go support simple until that's worked out, | |
10152 | go back through what we've read and create something usable. | |
10153 | We could do this while processing each DIE, and feels kinda cleaner, | |
10154 | but that way is more invasive. | |
10155 | This is to, for example, allow the user to type "p var" or "b main" | |
10156 | without having to specify the package name, and allow lookups | |
10157 | of module.object to work in contexts that use the expression | |
10158 | parser. */ | |
10159 | ||
10160 | static void | |
10161 | fixup_go_packaging (struct dwarf2_cu *cu) | |
10162 | { | |
10163 | char *package_name = NULL; | |
10164 | struct pending *list; | |
10165 | int i; | |
10166 | ||
10167 | for (list = global_symbols; list != NULL; list = list->next) | |
10168 | { | |
10169 | for (i = 0; i < list->nsyms; ++i) | |
10170 | { | |
10171 | struct symbol *sym = list->symbol[i]; | |
10172 | ||
10173 | if (SYMBOL_LANGUAGE (sym) == language_go | |
10174 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
10175 | { | |
10176 | char *this_package_name = go_symbol_package_name (sym); | |
10177 | ||
10178 | if (this_package_name == NULL) | |
10179 | continue; | |
10180 | if (package_name == NULL) | |
10181 | package_name = this_package_name; | |
10182 | else | |
10183 | { | |
10184 | if (strcmp (package_name, this_package_name) != 0) | |
10185 | complaint (&symfile_complaints, | |
10186 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
10187 | (symbol_symtab (sym) != NULL |
10188 | ? symtab_to_filename_for_display | |
10189 | (symbol_symtab (sym)) | |
4262abfb | 10190 | : objfile_name (cu->objfile)), |
a766d390 DE |
10191 | this_package_name, package_name); |
10192 | xfree (this_package_name); | |
10193 | } | |
10194 | } | |
10195 | } | |
10196 | } | |
10197 | ||
10198 | if (package_name != NULL) | |
10199 | { | |
10200 | struct objfile *objfile = cu->objfile; | |
34a68019 | 10201 | const char *saved_package_name |
224c3ddb SM |
10202 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
10203 | package_name, | |
10204 | strlen (package_name)); | |
19f392bc UW |
10205 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
10206 | saved_package_name); | |
a766d390 DE |
10207 | struct symbol *sym; |
10208 | ||
10209 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
10210 | ||
e623cf5d | 10211 | sym = allocate_symbol (objfile); |
f85f34ed | 10212 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
10213 | SYMBOL_SET_NAMES (sym, saved_package_name, |
10214 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
10215 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
10216 | e.g., "main" finds the "main" module and not C's main(). */ | |
10217 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 10218 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
10219 | SYMBOL_TYPE (sym) = type; |
10220 | ||
10221 | add_symbol_to_list (sym, &global_symbols); | |
10222 | ||
10223 | xfree (package_name); | |
10224 | } | |
10225 | } | |
10226 | ||
95554aad TT |
10227 | /* Return the symtab for PER_CU. This works properly regardless of |
10228 | whether we're using the index or psymtabs. */ | |
10229 | ||
43f3e411 DE |
10230 | static struct compunit_symtab * |
10231 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
10232 | { |
10233 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
10234 | ? per_cu->v.quick->compunit_symtab |
10235 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
10236 | } |
10237 | ||
10238 | /* A helper function for computing the list of all symbol tables | |
10239 | included by PER_CU. */ | |
10240 | ||
10241 | static void | |
43f3e411 | 10242 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 10243 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 10244 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 10245 | struct compunit_symtab *immediate_parent) |
95554aad TT |
10246 | { |
10247 | void **slot; | |
10248 | int ix; | |
43f3e411 | 10249 | struct compunit_symtab *cust; |
95554aad TT |
10250 | struct dwarf2_per_cu_data *iter; |
10251 | ||
10252 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
10253 | if (*slot != NULL) | |
10254 | { | |
10255 | /* This inclusion and its children have been processed. */ | |
10256 | return; | |
10257 | } | |
10258 | ||
10259 | *slot = per_cu; | |
10260 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
10261 | cust = get_compunit_symtab (per_cu); |
10262 | if (cust != NULL) | |
ec94af83 DE |
10263 | { |
10264 | /* If this is a type unit only add its symbol table if we haven't | |
10265 | seen it yet (type unit per_cu's can share symtabs). */ | |
10266 | if (per_cu->is_debug_types) | |
10267 | { | |
43f3e411 | 10268 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
10269 | if (*slot == NULL) |
10270 | { | |
43f3e411 DE |
10271 | *slot = cust; |
10272 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
10273 | if (cust->user == NULL) | |
10274 | cust->user = immediate_parent; | |
ec94af83 DE |
10275 | } |
10276 | } | |
10277 | else | |
f9125b6c | 10278 | { |
43f3e411 DE |
10279 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
10280 | if (cust->user == NULL) | |
10281 | cust->user = immediate_parent; | |
f9125b6c | 10282 | } |
ec94af83 | 10283 | } |
95554aad TT |
10284 | |
10285 | for (ix = 0; | |
796a7ff8 | 10286 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 10287 | ++ix) |
ec94af83 DE |
10288 | { |
10289 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 10290 | all_type_symtabs, iter, cust); |
ec94af83 | 10291 | } |
95554aad TT |
10292 | } |
10293 | ||
43f3e411 | 10294 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
10295 | PER_CU. */ |
10296 | ||
10297 | static void | |
43f3e411 | 10298 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 10299 | { |
f4dc4d17 DE |
10300 | gdb_assert (! per_cu->is_debug_types); |
10301 | ||
796a7ff8 | 10302 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
10303 | { |
10304 | int ix, len; | |
ec94af83 | 10305 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
10306 | struct compunit_symtab *compunit_symtab_iter; |
10307 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 10308 | htab_t all_children, all_type_symtabs; |
43f3e411 | 10309 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
10310 | |
10311 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 10312 | if (cust == NULL) |
95554aad TT |
10313 | return; |
10314 | ||
10315 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
10316 | NULL, xcalloc, xfree); | |
ec94af83 DE |
10317 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
10318 | NULL, xcalloc, xfree); | |
95554aad TT |
10319 | |
10320 | for (ix = 0; | |
796a7ff8 | 10321 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 10322 | ix, per_cu_iter); |
95554aad | 10323 | ++ix) |
ec94af83 DE |
10324 | { |
10325 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 10326 | all_type_symtabs, per_cu_iter, |
43f3e411 | 10327 | cust); |
ec94af83 | 10328 | } |
95554aad | 10329 | |
ec94af83 | 10330 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
10331 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
10332 | cust->includes | |
8d749320 SM |
10333 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
10334 | struct compunit_symtab *, len + 1); | |
95554aad | 10335 | for (ix = 0; |
43f3e411 DE |
10336 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
10337 | compunit_symtab_iter); | |
95554aad | 10338 | ++ix) |
43f3e411 DE |
10339 | cust->includes[ix] = compunit_symtab_iter; |
10340 | cust->includes[len] = NULL; | |
95554aad | 10341 | |
43f3e411 | 10342 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 10343 | htab_delete (all_children); |
ec94af83 | 10344 | htab_delete (all_type_symtabs); |
95554aad TT |
10345 | } |
10346 | } | |
10347 | ||
10348 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
10349 | read. */ | |
10350 | ||
10351 | static void | |
10352 | process_cu_includes (void) | |
10353 | { | |
10354 | int ix; | |
10355 | struct dwarf2_per_cu_data *iter; | |
10356 | ||
10357 | for (ix = 0; | |
10358 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
10359 | ix, iter); | |
10360 | ++ix) | |
f4dc4d17 DE |
10361 | { |
10362 | if (! iter->is_debug_types) | |
43f3e411 | 10363 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 10364 | } |
95554aad TT |
10365 | |
10366 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
10367 | } | |
10368 | ||
9cdd5dbd | 10369 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
10370 | already been loaded into memory. */ |
10371 | ||
10372 | static void | |
95554aad TT |
10373 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
10374 | enum language pretend_language) | |
10b3939b | 10375 | { |
10b3939b | 10376 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 10377 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 10378 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 10379 | CORE_ADDR lowpc, highpc; |
43f3e411 | 10380 | struct compunit_symtab *cust; |
33c7c59d | 10381 | struct cleanup *delayed_list_cleanup; |
10b3939b | 10382 | CORE_ADDR baseaddr; |
4359dff1 | 10383 | struct block *static_block; |
3e29f34a | 10384 | CORE_ADDR addr; |
10b3939b DJ |
10385 | |
10386 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
10387 | ||
10b3939b | 10388 | buildsym_init (); |
33c7c59d | 10389 | scoped_free_pendings free_pending; |
3da10d80 | 10390 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
10391 | |
10392 | cu->list_in_scope = &file_symbols; | |
c906108c | 10393 | |
95554aad TT |
10394 | cu->language = pretend_language; |
10395 | cu->language_defn = language_def (cu->language); | |
10396 | ||
c906108c | 10397 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 10398 | process_die (cu->dies, cu); |
c906108c | 10399 | |
a766d390 DE |
10400 | /* For now fudge the Go package. */ |
10401 | if (cu->language == language_go) | |
10402 | fixup_go_packaging (cu); | |
10403 | ||
3da10d80 KS |
10404 | /* Now that we have processed all the DIEs in the CU, all the types |
10405 | should be complete, and it should now be safe to compute all of the | |
10406 | physnames. */ | |
10407 | compute_delayed_physnames (cu); | |
10408 | do_cleanups (delayed_list_cleanup); | |
10409 | ||
fae299cd DC |
10410 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
10411 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
10412 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 10413 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 10414 | |
3e29f34a MR |
10415 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
10416 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
10417 | |
10418 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
10419 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
10420 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
10421 | addrmap to help ensure it has an accurate map of pc values belonging to | |
10422 | this comp unit. */ | |
10423 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
10424 | ||
43f3e411 DE |
10425 | cust = end_symtab_from_static_block (static_block, |
10426 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 10427 | |
43f3e411 | 10428 | if (cust != NULL) |
c906108c | 10429 | { |
df15bd07 | 10430 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 10431 | |
8be455d7 JK |
10432 | /* Set symtab language to language from DW_AT_language. If the |
10433 | compilation is from a C file generated by language preprocessors, do | |
10434 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 10435 | if (!(cu->language == language_c |
40e3ad0e | 10436 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 10437 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
10438 | |
10439 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
10440 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
10441 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
10442 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
10443 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
10444 | |
10445 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
10446 | needed, it would be wrong due to missing DW_AT_producer there. | |
10447 | ||
10448 | Still one can confuse GDB by using non-standard GCC compilation | |
10449 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
10450 | */ | |
ab260dad | 10451 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 10452 | cust->locations_valid = 1; |
e0d00bc7 JK |
10453 | |
10454 | if (gcc_4_minor >= 5) | |
43f3e411 | 10455 | cust->epilogue_unwind_valid = 1; |
96408a79 | 10456 | |
43f3e411 | 10457 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 10458 | } |
9291a0cd TT |
10459 | |
10460 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10461 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
10462 | else |
10463 | { | |
10464 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10465 | pst->compunit_symtab = cust; |
9291a0cd TT |
10466 | pst->readin = 1; |
10467 | } | |
c906108c | 10468 | |
95554aad TT |
10469 | /* Push it for inclusion processing later. */ |
10470 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
f4dc4d17 | 10471 | } |
45cfd468 | 10472 | |
f4dc4d17 DE |
10473 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
10474 | already been loaded into memory. */ | |
10475 | ||
10476 | static void | |
10477 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
10478 | enum language pretend_language) | |
10479 | { | |
10480 | struct dwarf2_cu *cu = per_cu->cu; | |
10481 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 10482 | struct compunit_symtab *cust; |
33c7c59d | 10483 | struct cleanup *delayed_list_cleanup; |
0186c6a7 DE |
10484 | struct signatured_type *sig_type; |
10485 | ||
10486 | gdb_assert (per_cu->is_debug_types); | |
10487 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
10488 | |
10489 | buildsym_init (); | |
33c7c59d | 10490 | scoped_free_pendings free_pending; |
f4dc4d17 DE |
10491 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10492 | ||
10493 | cu->list_in_scope = &file_symbols; | |
10494 | ||
10495 | cu->language = pretend_language; | |
10496 | cu->language_defn = language_def (cu->language); | |
10497 | ||
10498 | /* The symbol tables are set up in read_type_unit_scope. */ | |
10499 | process_die (cu->dies, cu); | |
10500 | ||
10501 | /* For now fudge the Go package. */ | |
10502 | if (cu->language == language_go) | |
10503 | fixup_go_packaging (cu); | |
10504 | ||
10505 | /* Now that we have processed all the DIEs in the CU, all the types | |
10506 | should be complete, and it should now be safe to compute all of the | |
10507 | physnames. */ | |
10508 | compute_delayed_physnames (cu); | |
10509 | do_cleanups (delayed_list_cleanup); | |
10510 | ||
10511 | /* TUs share symbol tables. | |
10512 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
10513 | of it with end_expandable_symtab. Otherwise, complete the addition of |
10514 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 10515 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 10516 | { |
43f3e411 DE |
10517 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
10518 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 10519 | |
43f3e411 | 10520 | if (cust != NULL) |
f4dc4d17 DE |
10521 | { |
10522 | /* Set symtab language to language from DW_AT_language. If the | |
10523 | compilation is from a C file generated by language preprocessors, | |
10524 | do not set the language if it was already deduced by | |
10525 | start_subfile. */ | |
43f3e411 DE |
10526 | if (!(cu->language == language_c |
10527 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
10528 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
10529 | } |
10530 | } | |
10531 | else | |
10532 | { | |
0ab9ce85 | 10533 | augment_type_symtab (); |
43f3e411 | 10534 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
10535 | } |
10536 | ||
10537 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10538 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
10539 | else |
10540 | { | |
10541 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10542 | pst->compunit_symtab = cust; |
f4dc4d17 | 10543 | pst->readin = 1; |
45cfd468 | 10544 | } |
c906108c SS |
10545 | } |
10546 | ||
95554aad TT |
10547 | /* Process an imported unit DIE. */ |
10548 | ||
10549 | static void | |
10550 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
10551 | { | |
10552 | struct attribute *attr; | |
10553 | ||
f4dc4d17 DE |
10554 | /* For now we don't handle imported units in type units. */ |
10555 | if (cu->per_cu->is_debug_types) | |
10556 | { | |
10557 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
10558 | " supported in type units [in module %s]"), | |
4262abfb | 10559 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
10560 | } |
10561 | ||
95554aad TT |
10562 | attr = dwarf2_attr (die, DW_AT_import, cu); |
10563 | if (attr != NULL) | |
10564 | { | |
9c541725 PA |
10565 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
10566 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
10567 | dwarf2_per_cu_data *per_cu | |
10568 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 10569 | |
69d751e3 | 10570 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
10571 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
10572 | load_full_comp_unit (per_cu, cu->language); | |
10573 | ||
796a7ff8 | 10574 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
10575 | per_cu); |
10576 | } | |
10577 | } | |
10578 | ||
4c8aa72d PA |
10579 | /* RAII object that represents a process_die scope: i.e., |
10580 | starts/finishes processing a DIE. */ | |
10581 | class process_die_scope | |
adde2bff | 10582 | { |
4c8aa72d PA |
10583 | public: |
10584 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
10585 | : m_die (die), m_cu (cu) | |
10586 | { | |
10587 | /* We should only be processing DIEs not already in process. */ | |
10588 | gdb_assert (!m_die->in_process); | |
10589 | m_die->in_process = true; | |
10590 | } | |
8c3cb9fa | 10591 | |
4c8aa72d PA |
10592 | ~process_die_scope () |
10593 | { | |
10594 | m_die->in_process = false; | |
10595 | ||
10596 | /* If we're done processing the DIE for the CU that owns the line | |
10597 | header, we don't need the line header anymore. */ | |
10598 | if (m_cu->line_header_die_owner == m_die) | |
10599 | { | |
10600 | delete m_cu->line_header; | |
10601 | m_cu->line_header = NULL; | |
10602 | m_cu->line_header_die_owner = NULL; | |
10603 | } | |
10604 | } | |
10605 | ||
10606 | private: | |
10607 | die_info *m_die; | |
10608 | dwarf2_cu *m_cu; | |
10609 | }; | |
adde2bff | 10610 | |
c906108c SS |
10611 | /* Process a die and its children. */ |
10612 | ||
10613 | static void | |
e7c27a73 | 10614 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10615 | { |
4c8aa72d | 10616 | process_die_scope scope (die, cu); |
adde2bff | 10617 | |
c906108c SS |
10618 | switch (die->tag) |
10619 | { | |
10620 | case DW_TAG_padding: | |
10621 | break; | |
10622 | case DW_TAG_compile_unit: | |
95554aad | 10623 | case DW_TAG_partial_unit: |
e7c27a73 | 10624 | read_file_scope (die, cu); |
c906108c | 10625 | break; |
348e048f DE |
10626 | case DW_TAG_type_unit: |
10627 | read_type_unit_scope (die, cu); | |
10628 | break; | |
c906108c | 10629 | case DW_TAG_subprogram: |
c906108c | 10630 | case DW_TAG_inlined_subroutine: |
edb3359d | 10631 | read_func_scope (die, cu); |
c906108c SS |
10632 | break; |
10633 | case DW_TAG_lexical_block: | |
14898363 L |
10634 | case DW_TAG_try_block: |
10635 | case DW_TAG_catch_block: | |
e7c27a73 | 10636 | read_lexical_block_scope (die, cu); |
c906108c | 10637 | break; |
216f72a1 | 10638 | case DW_TAG_call_site: |
96408a79 SA |
10639 | case DW_TAG_GNU_call_site: |
10640 | read_call_site_scope (die, cu); | |
10641 | break; | |
c906108c | 10642 | case DW_TAG_class_type: |
680b30c7 | 10643 | case DW_TAG_interface_type: |
c906108c SS |
10644 | case DW_TAG_structure_type: |
10645 | case DW_TAG_union_type: | |
134d01f1 | 10646 | process_structure_scope (die, cu); |
c906108c SS |
10647 | break; |
10648 | case DW_TAG_enumeration_type: | |
134d01f1 | 10649 | process_enumeration_scope (die, cu); |
c906108c | 10650 | break; |
134d01f1 | 10651 | |
f792889a DJ |
10652 | /* These dies have a type, but processing them does not create |
10653 | a symbol or recurse to process the children. Therefore we can | |
10654 | read them on-demand through read_type_die. */ | |
c906108c | 10655 | case DW_TAG_subroutine_type: |
72019c9c | 10656 | case DW_TAG_set_type: |
c906108c | 10657 | case DW_TAG_array_type: |
c906108c | 10658 | case DW_TAG_pointer_type: |
c906108c | 10659 | case DW_TAG_ptr_to_member_type: |
c906108c | 10660 | case DW_TAG_reference_type: |
4297a3f0 | 10661 | case DW_TAG_rvalue_reference_type: |
c906108c | 10662 | case DW_TAG_string_type: |
c906108c | 10663 | break; |
134d01f1 | 10664 | |
c906108c | 10665 | case DW_TAG_base_type: |
a02abb62 | 10666 | case DW_TAG_subrange_type: |
cb249c71 | 10667 | case DW_TAG_typedef: |
134d01f1 DJ |
10668 | /* Add a typedef symbol for the type definition, if it has a |
10669 | DW_AT_name. */ | |
f792889a | 10670 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 10671 | break; |
c906108c | 10672 | case DW_TAG_common_block: |
e7c27a73 | 10673 | read_common_block (die, cu); |
c906108c SS |
10674 | break; |
10675 | case DW_TAG_common_inclusion: | |
10676 | break; | |
d9fa45fe | 10677 | case DW_TAG_namespace: |
4d4ec4e5 | 10678 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 10679 | read_namespace (die, cu); |
d9fa45fe | 10680 | break; |
5d7cb8df | 10681 | case DW_TAG_module: |
4d4ec4e5 | 10682 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
10683 | read_module (die, cu); |
10684 | break; | |
d9fa45fe | 10685 | case DW_TAG_imported_declaration: |
74921315 KS |
10686 | cu->processing_has_namespace_info = 1; |
10687 | if (read_namespace_alias (die, cu)) | |
10688 | break; | |
10689 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 10690 | case DW_TAG_imported_module: |
4d4ec4e5 | 10691 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
10692 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
10693 | || cu->language != language_fortran)) | |
10694 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
10695 | dwarf_tag_name (die->tag)); | |
10696 | read_import_statement (die, cu); | |
d9fa45fe | 10697 | break; |
95554aad TT |
10698 | |
10699 | case DW_TAG_imported_unit: | |
10700 | process_imported_unit_die (die, cu); | |
10701 | break; | |
10702 | ||
71a3c369 TT |
10703 | case DW_TAG_variable: |
10704 | read_variable (die, cu); | |
10705 | break; | |
10706 | ||
c906108c | 10707 | default: |
e7c27a73 | 10708 | new_symbol (die, NULL, cu); |
c906108c SS |
10709 | break; |
10710 | } | |
10711 | } | |
ca69b9e6 DE |
10712 | \f |
10713 | /* DWARF name computation. */ | |
c906108c | 10714 | |
94af9270 KS |
10715 | /* A helper function for dwarf2_compute_name which determines whether DIE |
10716 | needs to have the name of the scope prepended to the name listed in the | |
10717 | die. */ | |
10718 | ||
10719 | static int | |
10720 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
10721 | { | |
1c809c68 TT |
10722 | struct attribute *attr; |
10723 | ||
94af9270 KS |
10724 | switch (die->tag) |
10725 | { | |
10726 | case DW_TAG_namespace: | |
10727 | case DW_TAG_typedef: | |
10728 | case DW_TAG_class_type: | |
10729 | case DW_TAG_interface_type: | |
10730 | case DW_TAG_structure_type: | |
10731 | case DW_TAG_union_type: | |
10732 | case DW_TAG_enumeration_type: | |
10733 | case DW_TAG_enumerator: | |
10734 | case DW_TAG_subprogram: | |
08a76f8a | 10735 | case DW_TAG_inlined_subroutine: |
94af9270 | 10736 | case DW_TAG_member: |
74921315 | 10737 | case DW_TAG_imported_declaration: |
94af9270 KS |
10738 | return 1; |
10739 | ||
10740 | case DW_TAG_variable: | |
c2b0a229 | 10741 | case DW_TAG_constant: |
94af9270 KS |
10742 | /* We only need to prefix "globally" visible variables. These include |
10743 | any variable marked with DW_AT_external or any variable that | |
10744 | lives in a namespace. [Variables in anonymous namespaces | |
10745 | require prefixing, but they are not DW_AT_external.] */ | |
10746 | ||
10747 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
10748 | { | |
10749 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 10750 | |
94af9270 KS |
10751 | return die_needs_namespace (die_specification (die, &spec_cu), |
10752 | spec_cu); | |
10753 | } | |
10754 | ||
1c809c68 | 10755 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
10756 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
10757 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
10758 | return 0; |
10759 | /* A variable in a lexical block of some kind does not need a | |
10760 | namespace, even though in C++ such variables may be external | |
10761 | and have a mangled name. */ | |
10762 | if (die->parent->tag == DW_TAG_lexical_block | |
10763 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
10764 | || die->parent->tag == DW_TAG_catch_block |
10765 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
10766 | return 0; |
10767 | return 1; | |
94af9270 KS |
10768 | |
10769 | default: | |
10770 | return 0; | |
10771 | } | |
10772 | } | |
10773 | ||
73b9be8b KS |
10774 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
10775 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10776 | defined for the given DIE. */ | |
10777 | ||
10778 | static struct attribute * | |
10779 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
10780 | { | |
10781 | struct attribute *attr; | |
10782 | ||
10783 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
10784 | if (attr == NULL) | |
10785 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10786 | ||
10787 | return attr; | |
10788 | } | |
10789 | ||
10790 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
10791 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10792 | defined for the given DIE. */ | |
10793 | ||
10794 | static const char * | |
10795 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
10796 | { | |
10797 | const char *linkage_name; | |
10798 | ||
10799 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
10800 | if (linkage_name == NULL) | |
10801 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10802 | ||
10803 | return linkage_name; | |
10804 | } | |
10805 | ||
94af9270 | 10806 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10807 | compute the physname for the object, which include a method's: |
9c37b5ae | 10808 | - formal parameters (C++), |
a766d390 | 10809 | - receiver type (Go), |
a766d390 DE |
10810 | |
10811 | The term "physname" is a bit confusing. | |
10812 | For C++, for example, it is the demangled name. | |
10813 | For Go, for example, it's the mangled name. | |
94af9270 | 10814 | |
af6b7be1 JB |
10815 | For Ada, return the DIE's linkage name rather than the fully qualified |
10816 | name. PHYSNAME is ignored.. | |
10817 | ||
94af9270 KS |
10818 | The result is allocated on the objfile_obstack and canonicalized. */ |
10819 | ||
10820 | static const char * | |
15d034d0 TT |
10821 | dwarf2_compute_name (const char *name, |
10822 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10823 | int physname) |
10824 | { | |
bb5ed363 DE |
10825 | struct objfile *objfile = cu->objfile; |
10826 | ||
94af9270 KS |
10827 | if (name == NULL) |
10828 | name = dwarf2_name (die, cu); | |
10829 | ||
2ee7123e DE |
10830 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10831 | but otherwise compute it by typename_concat inside GDB. | |
10832 | FIXME: Actually this is not really true, or at least not always true. | |
10833 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
10834 | Fortran names because there is no mangling standard. So new_symbol_full | |
10835 | will set the demangled name to the result of dwarf2_full_name, and it is | |
10836 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10837 | if (cu->language == language_ada |
10838 | || (cu->language == language_fortran && physname)) | |
10839 | { | |
10840 | /* For Ada unit, we prefer the linkage name over the name, as | |
10841 | the former contains the exported name, which the user expects | |
10842 | to be able to reference. Ideally, we want the user to be able | |
10843 | to reference this entity using either natural or linkage name, | |
10844 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10845 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10846 | |
2ee7123e DE |
10847 | if (linkage_name != NULL) |
10848 | return linkage_name; | |
f55ee35c JK |
10849 | } |
10850 | ||
94af9270 KS |
10851 | /* These are the only languages we know how to qualify names in. */ |
10852 | if (name != NULL | |
9c37b5ae | 10853 | && (cu->language == language_cplus |
c44af4eb TT |
10854 | || cu->language == language_fortran || cu->language == language_d |
10855 | || cu->language == language_rust)) | |
94af9270 KS |
10856 | { |
10857 | if (die_needs_namespace (die, cu)) | |
10858 | { | |
0d5cff50 | 10859 | const char *prefix; |
34a68019 | 10860 | const char *canonical_name = NULL; |
94af9270 | 10861 | |
d7e74731 PA |
10862 | string_file buf; |
10863 | ||
94af9270 | 10864 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10865 | if (*prefix != '\0') |
10866 | { | |
f55ee35c JK |
10867 | char *prefixed_name = typename_concat (NULL, prefix, name, |
10868 | physname, cu); | |
9a619af0 | 10869 | |
d7e74731 | 10870 | buf.puts (prefixed_name); |
94af9270 KS |
10871 | xfree (prefixed_name); |
10872 | } | |
10873 | else | |
d7e74731 | 10874 | buf.puts (name); |
94af9270 | 10875 | |
98bfdba5 PA |
10876 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10877 | as children with DW_TAG_template_type_param or | |
10878 | DW_TAG_value_type_param. If the latter, add them to the name | |
10879 | here. If the name already has template parameters, then | |
10880 | skip this step; some versions of GCC emit both, and | |
10881 | it is more efficient to use the pre-computed name. | |
10882 | ||
10883 | Something to keep in mind about this process: it is very | |
10884 | unlikely, or in some cases downright impossible, to produce | |
10885 | something that will match the mangled name of a function. | |
10886 | If the definition of the function has the same debug info, | |
10887 | we should be able to match up with it anyway. But fallbacks | |
10888 | using the minimal symbol, for instance to find a method | |
10889 | implemented in a stripped copy of libstdc++, will not work. | |
10890 | If we do not have debug info for the definition, we will have to | |
10891 | match them up some other way. | |
10892 | ||
10893 | When we do name matching there is a related problem with function | |
10894 | templates; two instantiated function templates are allowed to | |
10895 | differ only by their return types, which we do not add here. */ | |
10896 | ||
10897 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10898 | { | |
10899 | struct attribute *attr; | |
10900 | struct die_info *child; | |
10901 | int first = 1; | |
10902 | ||
10903 | die->building_fullname = 1; | |
10904 | ||
10905 | for (child = die->child; child != NULL; child = child->sibling) | |
10906 | { | |
10907 | struct type *type; | |
12df843f | 10908 | LONGEST value; |
d521ce57 | 10909 | const gdb_byte *bytes; |
98bfdba5 PA |
10910 | struct dwarf2_locexpr_baton *baton; |
10911 | struct value *v; | |
10912 | ||
10913 | if (child->tag != DW_TAG_template_type_param | |
10914 | && child->tag != DW_TAG_template_value_param) | |
10915 | continue; | |
10916 | ||
10917 | if (first) | |
10918 | { | |
d7e74731 | 10919 | buf.puts ("<"); |
98bfdba5 PA |
10920 | first = 0; |
10921 | } | |
10922 | else | |
d7e74731 | 10923 | buf.puts (", "); |
98bfdba5 PA |
10924 | |
10925 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10926 | if (attr == NULL) | |
10927 | { | |
10928 | complaint (&symfile_complaints, | |
10929 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 10930 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10931 | continue; |
10932 | } | |
10933 | type = die_type (child, cu); | |
10934 | ||
10935 | if (child->tag == DW_TAG_template_type_param) | |
10936 | { | |
d7e74731 | 10937 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
10938 | continue; |
10939 | } | |
10940 | ||
10941 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10942 | if (attr == NULL) | |
10943 | { | |
10944 | complaint (&symfile_complaints, | |
3e43a32a MS |
10945 | _("template parameter missing " |
10946 | "DW_AT_const_value")); | |
d7e74731 | 10947 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10948 | continue; |
10949 | } | |
10950 | ||
10951 | dwarf2_const_value_attr (attr, type, name, | |
10952 | &cu->comp_unit_obstack, cu, | |
10953 | &value, &bytes, &baton); | |
10954 | ||
10955 | if (TYPE_NOSIGN (type)) | |
10956 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10957 | changed, this can use value_print instead. */ | |
d7e74731 | 10958 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10959 | else |
10960 | { | |
10961 | struct value_print_options opts; | |
10962 | ||
10963 | if (baton != NULL) | |
10964 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10965 | baton->data, | |
10966 | baton->size, | |
10967 | baton->per_cu); | |
10968 | else if (bytes != NULL) | |
10969 | { | |
10970 | v = allocate_value (type); | |
10971 | memcpy (value_contents_writeable (v), bytes, | |
10972 | TYPE_LENGTH (type)); | |
10973 | } | |
10974 | else | |
10975 | v = value_from_longest (type, value); | |
10976 | ||
3e43a32a MS |
10977 | /* Specify decimal so that we do not depend on |
10978 | the radix. */ | |
98bfdba5 PA |
10979 | get_formatted_print_options (&opts, 'd'); |
10980 | opts.raw = 1; | |
d7e74731 | 10981 | value_print (v, &buf, &opts); |
98bfdba5 PA |
10982 | release_value (v); |
10983 | value_free (v); | |
10984 | } | |
10985 | } | |
10986 | ||
10987 | die->building_fullname = 0; | |
10988 | ||
10989 | if (!first) | |
10990 | { | |
10991 | /* Close the argument list, with a space if necessary | |
10992 | (nested templates). */ | |
d7e74731 PA |
10993 | if (!buf.empty () && buf.string ().back () == '>') |
10994 | buf.puts (" >"); | |
98bfdba5 | 10995 | else |
d7e74731 | 10996 | buf.puts (">"); |
98bfdba5 PA |
10997 | } |
10998 | } | |
10999 | ||
9c37b5ae | 11000 | /* For C++ methods, append formal parameter type |
94af9270 | 11001 | information, if PHYSNAME. */ |
6e70227d | 11002 | |
94af9270 | 11003 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 11004 | && cu->language == language_cplus) |
94af9270 KS |
11005 | { |
11006 | struct type *type = read_type_die (die, cu); | |
11007 | ||
d7e74731 | 11008 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 11009 | &type_print_raw_options); |
94af9270 | 11010 | |
9c37b5ae | 11011 | if (cu->language == language_cplus) |
94af9270 | 11012 | { |
60430eff DJ |
11013 | /* Assume that an artificial first parameter is |
11014 | "this", but do not crash if it is not. RealView | |
11015 | marks unnamed (and thus unused) parameters as | |
11016 | artificial; there is no way to differentiate | |
11017 | the two cases. */ | |
94af9270 KS |
11018 | if (TYPE_NFIELDS (type) > 0 |
11019 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 11020 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
11021 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
11022 | 0)))) | |
d7e74731 | 11023 | buf.puts (" const"); |
94af9270 KS |
11024 | } |
11025 | } | |
11026 | ||
d7e74731 | 11027 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
11028 | |
11029 | if (cu->language == language_cplus) | |
34a68019 | 11030 | canonical_name |
322a8516 | 11031 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
11032 | &objfile->per_bfd->storage_obstack); |
11033 | ||
11034 | /* If we only computed INTERMEDIATE_NAME, or if | |
11035 | INTERMEDIATE_NAME is already canonical, then we need to | |
11036 | copy it to the appropriate obstack. */ | |
322a8516 | 11037 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
11038 | name = ((const char *) |
11039 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
11040 | intermediate_name.c_str (), |
11041 | intermediate_name.length ())); | |
34a68019 TT |
11042 | else |
11043 | name = canonical_name; | |
94af9270 KS |
11044 | } |
11045 | } | |
11046 | ||
11047 | return name; | |
11048 | } | |
11049 | ||
0114d602 DJ |
11050 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
11051 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 11052 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
11053 | not have a name. NAME may either be from a previous call to |
11054 | dwarf2_name or NULL. | |
11055 | ||
9c37b5ae | 11056 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
11057 | |
11058 | static const char * | |
15d034d0 | 11059 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 11060 | { |
94af9270 KS |
11061 | return dwarf2_compute_name (name, die, cu, 0); |
11062 | } | |
0114d602 | 11063 | |
94af9270 KS |
11064 | /* Construct a physname for the given DIE in CU. NAME may either be |
11065 | from a previous call to dwarf2_name or NULL. The result will be | |
11066 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
11067 | name. | |
0114d602 | 11068 | |
9c37b5ae | 11069 | The output string will be canonicalized (if C++). */ |
0114d602 | 11070 | |
94af9270 | 11071 | static const char * |
15d034d0 | 11072 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 11073 | { |
bb5ed363 | 11074 | struct objfile *objfile = cu->objfile; |
900e11f9 | 11075 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
11076 | int need_copy = 1; |
11077 | ||
11078 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
11079 | on its own. */ | |
11080 | if (!die_needs_namespace (die, cu)) | |
11081 | return dwarf2_compute_name (name, die, cu, 1); | |
11082 | ||
73b9be8b | 11083 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 11084 | |
e98c9e7c TT |
11085 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
11086 | See https://github.com/rust-lang/rust/issues/32925. */ | |
11087 | if (cu->language == language_rust && mangled != NULL | |
11088 | && strchr (mangled, '{') != NULL) | |
11089 | mangled = NULL; | |
11090 | ||
900e11f9 JK |
11091 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
11092 | has computed. */ | |
791afaa2 | 11093 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 11094 | if (mangled != NULL) |
900e11f9 | 11095 | { |
900e11f9 JK |
11096 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
11097 | type. It is easier for GDB users to search for such functions as | |
11098 | `name(params)' than `long name(params)'. In such case the minimal | |
11099 | symbol names do not match the full symbol names but for template | |
11100 | functions there is never a need to look up their definition from their | |
11101 | declaration so the only disadvantage remains the minimal symbol | |
11102 | variant `long name(params)' does not have the proper inferior type. | |
11103 | */ | |
11104 | ||
a766d390 DE |
11105 | if (cu->language == language_go) |
11106 | { | |
11107 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
11108 | new_symbol_full assumes we return the mangled name. | |
11109 | This just undoes that lie until things are cleaned up. */ | |
a766d390 DE |
11110 | } |
11111 | else | |
11112 | { | |
791afaa2 TT |
11113 | demangled.reset (gdb_demangle (mangled, |
11114 | (DMGL_PARAMS | DMGL_ANSI | |
11115 | | DMGL_RET_DROP))); | |
a766d390 | 11116 | } |
900e11f9 | 11117 | if (demangled) |
791afaa2 | 11118 | canon = demangled.get (); |
900e11f9 JK |
11119 | else |
11120 | { | |
11121 | canon = mangled; | |
11122 | need_copy = 0; | |
11123 | } | |
11124 | } | |
11125 | ||
11126 | if (canon == NULL || check_physname) | |
11127 | { | |
11128 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
11129 | ||
11130 | if (canon != NULL && strcmp (physname, canon) != 0) | |
11131 | { | |
11132 | /* It may not mean a bug in GDB. The compiler could also | |
11133 | compute DW_AT_linkage_name incorrectly. But in such case | |
11134 | GDB would need to be bug-to-bug compatible. */ | |
11135 | ||
11136 | complaint (&symfile_complaints, | |
11137 | _("Computed physname <%s> does not match demangled <%s> " | |
11138 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 11139 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 11140 | objfile_name (objfile)); |
900e11f9 JK |
11141 | |
11142 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
11143 | is available here - over computed PHYSNAME. It is safer | |
11144 | against both buggy GDB and buggy compilers. */ | |
11145 | ||
11146 | retval = canon; | |
11147 | } | |
11148 | else | |
11149 | { | |
11150 | retval = physname; | |
11151 | need_copy = 0; | |
11152 | } | |
11153 | } | |
11154 | else | |
11155 | retval = canon; | |
11156 | ||
11157 | if (need_copy) | |
224c3ddb SM |
11158 | retval = ((const char *) |
11159 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
11160 | retval, strlen (retval))); | |
900e11f9 | 11161 | |
900e11f9 | 11162 | return retval; |
0114d602 DJ |
11163 | } |
11164 | ||
74921315 KS |
11165 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
11166 | a new symbol for it. | |
11167 | ||
11168 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
11169 | ||
11170 | static int | |
11171 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
11172 | { | |
11173 | struct attribute *attr; | |
11174 | ||
11175 | /* If the die does not have a name, this is not a namespace | |
11176 | alias. */ | |
11177 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
11178 | if (attr != NULL) | |
11179 | { | |
11180 | int num; | |
11181 | struct die_info *d = die; | |
11182 | struct dwarf2_cu *imported_cu = cu; | |
11183 | ||
11184 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
11185 | keep inspecting DIEs until we hit the underlying import. */ | |
11186 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
11187 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
11188 | { | |
11189 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
11190 | if (attr == NULL) | |
11191 | break; | |
11192 | ||
11193 | d = follow_die_ref (d, attr, &imported_cu); | |
11194 | if (d->tag != DW_TAG_imported_declaration) | |
11195 | break; | |
11196 | } | |
11197 | ||
11198 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
11199 | { | |
11200 | complaint (&symfile_complaints, | |
11201 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 11202 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
11203 | return 0; |
11204 | } | |
11205 | ||
11206 | if (attr != NULL) | |
11207 | { | |
11208 | struct type *type; | |
9c541725 | 11209 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 11210 | |
9c541725 | 11211 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
11212 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
11213 | { | |
11214 | /* This declaration is a global namespace alias. Add | |
11215 | a symbol for it whose type is the aliased namespace. */ | |
11216 | new_symbol (die, type, cu); | |
11217 | return 1; | |
11218 | } | |
11219 | } | |
11220 | } | |
11221 | ||
11222 | return 0; | |
11223 | } | |
11224 | ||
22cee43f PMR |
11225 | /* Return the using directives repository (global or local?) to use in the |
11226 | current context for LANGUAGE. | |
11227 | ||
11228 | For Ada, imported declarations can materialize renamings, which *may* be | |
11229 | global. However it is impossible (for now?) in DWARF to distinguish | |
11230 | "external" imported declarations and "static" ones. As all imported | |
11231 | declarations seem to be static in all other languages, make them all CU-wide | |
11232 | global only in Ada. */ | |
11233 | ||
11234 | static struct using_direct ** | |
11235 | using_directives (enum language language) | |
11236 | { | |
11237 | if (language == language_ada && context_stack_depth == 0) | |
11238 | return &global_using_directives; | |
11239 | else | |
11240 | return &local_using_directives; | |
11241 | } | |
11242 | ||
27aa8d6a SW |
11243 | /* Read the import statement specified by the given die and record it. */ |
11244 | ||
11245 | static void | |
11246 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
11247 | { | |
bb5ed363 | 11248 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 11249 | struct attribute *import_attr; |
32019081 | 11250 | struct die_info *imported_die, *child_die; |
de4affc9 | 11251 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 11252 | const char *imported_name; |
794684b6 | 11253 | const char *imported_name_prefix; |
13387711 SW |
11254 | const char *canonical_name; |
11255 | const char *import_alias; | |
11256 | const char *imported_declaration = NULL; | |
794684b6 | 11257 | const char *import_prefix; |
eb1e02fd | 11258 | std::vector<const char *> excludes; |
13387711 | 11259 | |
27aa8d6a SW |
11260 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
11261 | if (import_attr == NULL) | |
11262 | { | |
11263 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
11264 | dwarf_tag_name (die->tag)); | |
11265 | return; | |
11266 | } | |
11267 | ||
de4affc9 CC |
11268 | imported_cu = cu; |
11269 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
11270 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
11271 | if (imported_name == NULL) |
11272 | { | |
11273 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
11274 | ||
11275 | The import in the following code: | |
11276 | namespace A | |
11277 | { | |
11278 | typedef int B; | |
11279 | } | |
11280 | ||
11281 | int main () | |
11282 | { | |
11283 | using A::B; | |
11284 | B b; | |
11285 | return b; | |
11286 | } | |
11287 | ||
11288 | ... | |
11289 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
11290 | <52> DW_AT_decl_file : 1 | |
11291 | <53> DW_AT_decl_line : 6 | |
11292 | <54> DW_AT_import : <0x75> | |
11293 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
11294 | <59> DW_AT_name : B | |
11295 | <5b> DW_AT_decl_file : 1 | |
11296 | <5c> DW_AT_decl_line : 2 | |
11297 | <5d> DW_AT_type : <0x6e> | |
11298 | ... | |
11299 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
11300 | <76> DW_AT_byte_size : 4 | |
11301 | <77> DW_AT_encoding : 5 (signed) | |
11302 | ||
11303 | imports the wrong die ( 0x75 instead of 0x58 ). | |
11304 | This case will be ignored until the gcc bug is fixed. */ | |
11305 | return; | |
11306 | } | |
11307 | ||
82856980 SW |
11308 | /* Figure out the local name after import. */ |
11309 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 11310 | |
794684b6 SW |
11311 | /* Figure out where the statement is being imported to. */ |
11312 | import_prefix = determine_prefix (die, cu); | |
11313 | ||
11314 | /* Figure out what the scope of the imported die is and prepend it | |
11315 | to the name of the imported die. */ | |
de4affc9 | 11316 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 11317 | |
f55ee35c JK |
11318 | if (imported_die->tag != DW_TAG_namespace |
11319 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 11320 | { |
13387711 SW |
11321 | imported_declaration = imported_name; |
11322 | canonical_name = imported_name_prefix; | |
794684b6 | 11323 | } |
13387711 | 11324 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 11325 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
11326 | imported_name_prefix, |
11327 | (cu->language == language_d ? "." : "::"), | |
11328 | imported_name, (char *) NULL); | |
13387711 SW |
11329 | else |
11330 | canonical_name = imported_name; | |
794684b6 | 11331 | |
32019081 JK |
11332 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
11333 | for (child_die = die->child; child_die && child_die->tag; | |
11334 | child_die = sibling_die (child_die)) | |
11335 | { | |
11336 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
11337 | represented by an imported module entry with an import attribute | |
11338 | referring to the module and owned entries corresponding to those | |
11339 | entities that are renamed as part of being imported. */ | |
11340 | ||
11341 | if (child_die->tag != DW_TAG_imported_declaration) | |
11342 | { | |
11343 | complaint (&symfile_complaints, | |
11344 | _("child DW_TAG_imported_declaration expected " | |
11345 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 11346 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
11347 | continue; |
11348 | } | |
11349 | ||
11350 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
11351 | if (import_attr == NULL) | |
11352 | { | |
11353 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
11354 | dwarf_tag_name (child_die->tag)); | |
11355 | continue; | |
11356 | } | |
11357 | ||
11358 | imported_cu = cu; | |
11359 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
11360 | &imported_cu); | |
11361 | imported_name = dwarf2_name (imported_die, imported_cu); | |
11362 | if (imported_name == NULL) | |
11363 | { | |
11364 | complaint (&symfile_complaints, | |
11365 | _("child DW_TAG_imported_declaration has unknown " | |
11366 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 11367 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
11368 | continue; |
11369 | } | |
11370 | ||
eb1e02fd | 11371 | excludes.push_back (imported_name); |
32019081 JK |
11372 | |
11373 | process_die (child_die, cu); | |
11374 | } | |
11375 | ||
22cee43f PMR |
11376 | add_using_directive (using_directives (cu->language), |
11377 | import_prefix, | |
11378 | canonical_name, | |
11379 | import_alias, | |
11380 | imported_declaration, | |
11381 | excludes, | |
11382 | 0, | |
11383 | &objfile->objfile_obstack); | |
27aa8d6a SW |
11384 | } |
11385 | ||
5230b05a WT |
11386 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
11387 | types, but gives them a size of zero. Starting with version 14, | |
11388 | ICC is compatible with GCC. */ | |
11389 | ||
11390 | static int | |
11391 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
11392 | { | |
11393 | if (!cu->checked_producer) | |
11394 | check_producer (cu); | |
11395 | ||
11396 | return cu->producer_is_icc_lt_14; | |
11397 | } | |
11398 | ||
1b80a9fa JK |
11399 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
11400 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
11401 | this, it was first present in GCC release 4.3.0. */ | |
11402 | ||
11403 | static int | |
11404 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
11405 | { | |
11406 | if (!cu->checked_producer) | |
11407 | check_producer (cu); | |
11408 | ||
11409 | return cu->producer_is_gcc_lt_4_3; | |
11410 | } | |
11411 | ||
d721ba37 PA |
11412 | static file_and_directory |
11413 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 11414 | { |
d721ba37 PA |
11415 | file_and_directory res; |
11416 | ||
9291a0cd TT |
11417 | /* Find the filename. Do not use dwarf2_name here, since the filename |
11418 | is not a source language identifier. */ | |
d721ba37 PA |
11419 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
11420 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 11421 | |
d721ba37 PA |
11422 | if (res.comp_dir == NULL |
11423 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
11424 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 11425 | { |
d721ba37 PA |
11426 | res.comp_dir_storage = ldirname (res.name); |
11427 | if (!res.comp_dir_storage.empty ()) | |
11428 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 11429 | } |
d721ba37 | 11430 | if (res.comp_dir != NULL) |
9291a0cd TT |
11431 | { |
11432 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
11433 | directory, get rid of it. */ | |
d721ba37 | 11434 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 11435 | |
d721ba37 PA |
11436 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
11437 | res.comp_dir = cp + 1; | |
9291a0cd TT |
11438 | } |
11439 | ||
d721ba37 PA |
11440 | if (res.name == NULL) |
11441 | res.name = "<unknown>"; | |
11442 | ||
11443 | return res; | |
9291a0cd TT |
11444 | } |
11445 | ||
f4dc4d17 DE |
11446 | /* Handle DW_AT_stmt_list for a compilation unit. |
11447 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
11448 | COMP_DIR is the compilation directory. LOWPC is passed to |
11449 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
11450 | |
11451 | static void | |
11452 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 11453 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 11454 | { |
527f3840 | 11455 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 11456 | struct attribute *attr; |
527f3840 JK |
11457 | struct line_header line_header_local; |
11458 | hashval_t line_header_local_hash; | |
527f3840 JK |
11459 | void **slot; |
11460 | int decode_mapping; | |
2ab95328 | 11461 | |
f4dc4d17 DE |
11462 | gdb_assert (! cu->per_cu->is_debug_types); |
11463 | ||
2ab95328 | 11464 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
11465 | if (attr == NULL) |
11466 | return; | |
11467 | ||
9c541725 | 11468 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
11469 | |
11470 | /* The line header hash table is only created if needed (it exists to | |
11471 | prevent redundant reading of the line table for partial_units). | |
11472 | If we're given a partial_unit, we'll need it. If we're given a | |
11473 | compile_unit, then use the line header hash table if it's already | |
11474 | created, but don't create one just yet. */ | |
11475 | ||
11476 | if (dwarf2_per_objfile->line_header_hash == NULL | |
11477 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 11478 | { |
527f3840 JK |
11479 | dwarf2_per_objfile->line_header_hash |
11480 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
11481 | line_header_eq_voidp, | |
11482 | free_line_header_voidp, | |
11483 | &objfile->objfile_obstack, | |
11484 | hashtab_obstack_allocate, | |
11485 | dummy_obstack_deallocate); | |
11486 | } | |
2ab95328 | 11487 | |
9c541725 | 11488 | line_header_local.sect_off = line_offset; |
527f3840 JK |
11489 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
11490 | line_header_local_hash = line_header_hash (&line_header_local); | |
11491 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
11492 | { | |
11493 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11494 | &line_header_local, | |
11495 | line_header_local_hash, NO_INSERT); | |
11496 | ||
11497 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
11498 | is not present in *SLOT (since if there is something in *SLOT then | |
11499 | it will be for a partial_unit). */ | |
11500 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 11501 | { |
527f3840 | 11502 | gdb_assert (*slot != NULL); |
9a3c8263 | 11503 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 11504 | return; |
dee91e82 | 11505 | } |
2ab95328 | 11506 | } |
527f3840 JK |
11507 | |
11508 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
11509 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
11510 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
11511 | if (lh == NULL) | |
527f3840 | 11512 | return; |
4c8aa72d PA |
11513 | |
11514 | cu->line_header = lh.release (); | |
11515 | cu->line_header_die_owner = die; | |
527f3840 JK |
11516 | |
11517 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
11518 | slot = NULL; | |
11519 | else | |
11520 | { | |
11521 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11522 | &line_header_local, | |
11523 | line_header_local_hash, INSERT); | |
11524 | gdb_assert (slot != NULL); | |
11525 | } | |
11526 | if (slot != NULL && *slot == NULL) | |
11527 | { | |
11528 | /* This newly decoded line number information unit will be owned | |
11529 | by line_header_hash hash table. */ | |
11530 | *slot = cu->line_header; | |
4c8aa72d | 11531 | cu->line_header_die_owner = NULL; |
527f3840 JK |
11532 | } |
11533 | else | |
11534 | { | |
11535 | /* We cannot free any current entry in (*slot) as that struct line_header | |
11536 | may be already used by multiple CUs. Create only temporary decoded | |
11537 | line_header for this CU - it may happen at most once for each line | |
11538 | number information unit. And if we're not using line_header_hash | |
11539 | then this is what we want as well. */ | |
11540 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
11541 | } |
11542 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
11543 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
11544 | decode_mapping); | |
fff8551c | 11545 | |
2ab95328 TT |
11546 | } |
11547 | ||
95554aad | 11548 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 11549 | |
c906108c | 11550 | static void |
e7c27a73 | 11551 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11552 | { |
dee91e82 | 11553 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 11554 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 11555 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
11556 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
11557 | struct attribute *attr; | |
c906108c | 11558 | struct die_info *child_die; |
e142c38c | 11559 | CORE_ADDR baseaddr; |
6e70227d | 11560 | |
e142c38c | 11561 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 11562 | |
fae299cd | 11563 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
11564 | |
11565 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
11566 | from finish_block. */ | |
2acceee2 | 11567 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 11568 | lowpc = highpc; |
3e29f34a | 11569 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 11570 | |
d721ba37 | 11571 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 11572 | |
95554aad | 11573 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 11574 | |
f4b8a18d KW |
11575 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
11576 | standardised yet. As a workaround for the language detection we fall | |
11577 | back to the DW_AT_producer string. */ | |
11578 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
11579 | cu->language = language_opencl; | |
11580 | ||
3019eac3 DE |
11581 | /* Similar hack for Go. */ |
11582 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
11583 | set_cu_language (DW_LANG_Go, cu); | |
11584 | ||
d721ba37 | 11585 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
11586 | |
11587 | /* Decode line number information if present. We do this before | |
11588 | processing child DIEs, so that the line header table is available | |
11589 | for DW_AT_decl_file. */ | |
d721ba37 | 11590 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
11591 | |
11592 | /* Process all dies in compilation unit. */ | |
11593 | if (die->child != NULL) | |
11594 | { | |
11595 | child_die = die->child; | |
11596 | while (child_die && child_die->tag) | |
11597 | { | |
11598 | process_die (child_die, cu); | |
11599 | child_die = sibling_die (child_die); | |
11600 | } | |
11601 | } | |
11602 | ||
11603 | /* Decode macro information, if present. Dwarf 2 macro information | |
11604 | refers to information in the line number info statement program | |
11605 | header, so we can only read it if we've read the header | |
11606 | successfully. */ | |
0af92d60 JK |
11607 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
11608 | if (attr == NULL) | |
11609 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
11610 | if (attr && cu->line_header) |
11611 | { | |
11612 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
11613 | complaint (&symfile_complaints, | |
0af92d60 | 11614 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 11615 | |
43f3e411 | 11616 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
11617 | } |
11618 | else | |
11619 | { | |
11620 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
11621 | if (attr && cu->line_header) | |
11622 | { | |
11623 | unsigned int macro_offset = DW_UNSND (attr); | |
11624 | ||
43f3e411 | 11625 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
11626 | } |
11627 | } | |
3019eac3 DE |
11628 | } |
11629 | ||
f4dc4d17 DE |
11630 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
11631 | Create the set of symtabs used by this TU, or if this TU is sharing | |
11632 | symtabs with another TU and the symtabs have already been created | |
11633 | then restore those symtabs in the line header. | |
11634 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
11635 | |
11636 | static void | |
f4dc4d17 | 11637 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 11638 | { |
f4dc4d17 DE |
11639 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
11640 | struct type_unit_group *tu_group; | |
11641 | int first_time; | |
3019eac3 | 11642 | struct attribute *attr; |
9c541725 | 11643 | unsigned int i; |
0186c6a7 | 11644 | struct signatured_type *sig_type; |
3019eac3 | 11645 | |
f4dc4d17 | 11646 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 11647 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 11648 | |
f4dc4d17 | 11649 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 11650 | |
f4dc4d17 | 11651 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 11652 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
11653 | if (sig_type->type_unit_group == NULL) |
11654 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
11655 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
11656 | |
11657 | /* If we've already processed this stmt_list there's no real need to | |
11658 | do it again, we could fake it and just recreate the part we need | |
11659 | (file name,index -> symtab mapping). If data shows this optimization | |
11660 | is useful we can do it then. */ | |
43f3e411 | 11661 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
11662 | |
11663 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
11664 | debug info. */ | |
fff8551c | 11665 | line_header_up lh; |
f4dc4d17 | 11666 | if (attr != NULL) |
3019eac3 | 11667 | { |
9c541725 | 11668 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
11669 | lh = dwarf_decode_line_header (line_offset, cu); |
11670 | } | |
11671 | if (lh == NULL) | |
11672 | { | |
11673 | if (first_time) | |
11674 | dwarf2_start_symtab (cu, "", NULL, 0); | |
11675 | else | |
11676 | { | |
11677 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 11678 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 11679 | } |
f4dc4d17 | 11680 | return; |
3019eac3 DE |
11681 | } |
11682 | ||
4c8aa72d PA |
11683 | cu->line_header = lh.release (); |
11684 | cu->line_header_die_owner = die; | |
3019eac3 | 11685 | |
f4dc4d17 DE |
11686 | if (first_time) |
11687 | { | |
43f3e411 | 11688 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 11689 | |
1fd60fc0 DE |
11690 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
11691 | still initializing it, and our caller (a few levels up) | |
11692 | process_full_type_unit still needs to know if this is the first | |
11693 | time. */ | |
11694 | ||
4c8aa72d PA |
11695 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
11696 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
11697 | cu->line_header->file_names.size ()); | |
3019eac3 | 11698 | |
4c8aa72d | 11699 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 11700 | { |
4c8aa72d | 11701 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 11702 | |
4c8aa72d | 11703 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 11704 | |
f4dc4d17 DE |
11705 | if (current_subfile->symtab == NULL) |
11706 | { | |
4c8aa72d PA |
11707 | /* NOTE: start_subfile will recognize when it's been |
11708 | passed a file it has already seen. So we can't | |
11709 | assume there's a simple mapping from | |
11710 | cu->line_header->file_names to subfiles, plus | |
11711 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
11712 | current_subfile->symtab |
11713 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
11714 | } |
11715 | ||
8c43009f PA |
11716 | fe.symtab = current_subfile->symtab; |
11717 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
11718 | } |
11719 | } | |
11720 | else | |
3019eac3 | 11721 | { |
0ab9ce85 | 11722 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 11723 | |
4c8aa72d | 11724 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 11725 | { |
4c8aa72d | 11726 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 11727 | |
4c8aa72d | 11728 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 11729 | } |
3019eac3 DE |
11730 | } |
11731 | ||
f4dc4d17 DE |
11732 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
11733 | so they don't have a "real" (so to speak) symtab anyway. | |
11734 | There is later code that will assign the main symtab to all symbols | |
11735 | that don't have one. We need to handle the case of a symbol with a | |
11736 | missing symtab (DW_AT_decl_file) anyway. */ | |
11737 | } | |
3019eac3 | 11738 | |
f4dc4d17 DE |
11739 | /* Process DW_TAG_type_unit. |
11740 | For TUs we want to skip the first top level sibling if it's not the | |
11741 | actual type being defined by this TU. In this case the first top | |
11742 | level sibling is there to provide context only. */ | |
3019eac3 | 11743 | |
f4dc4d17 DE |
11744 | static void |
11745 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11746 | { | |
11747 | struct die_info *child_die; | |
3019eac3 | 11748 | |
f4dc4d17 DE |
11749 | prepare_one_comp_unit (cu, die, language_minimal); |
11750 | ||
11751 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
11752 | We do this before processing child DIEs, so that the line header table | |
11753 | is available for DW_AT_decl_file. */ | |
11754 | setup_type_unit_groups (die, cu); | |
11755 | ||
11756 | if (die->child != NULL) | |
11757 | { | |
11758 | child_die = die->child; | |
11759 | while (child_die && child_die->tag) | |
11760 | { | |
11761 | process_die (child_die, cu); | |
11762 | child_die = sibling_die (child_die); | |
11763 | } | |
11764 | } | |
3019eac3 DE |
11765 | } |
11766 | \f | |
80626a55 DE |
11767 | /* DWO/DWP files. |
11768 | ||
11769 | http://gcc.gnu.org/wiki/DebugFission | |
11770 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
11771 | ||
11772 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
11773 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
11774 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
11775 | |
11776 | static hashval_t | |
11777 | hash_dwo_file (const void *item) | |
11778 | { | |
9a3c8263 | 11779 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 11780 | hashval_t hash; |
3019eac3 | 11781 | |
a2ce51a0 DE |
11782 | hash = htab_hash_string (dwo_file->dwo_name); |
11783 | if (dwo_file->comp_dir != NULL) | |
11784 | hash += htab_hash_string (dwo_file->comp_dir); | |
11785 | return hash; | |
3019eac3 DE |
11786 | } |
11787 | ||
11788 | static int | |
11789 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
11790 | { | |
9a3c8263 SM |
11791 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11792 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11793 | |
a2ce51a0 DE |
11794 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11795 | return 0; | |
11796 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11797 | return lhs->comp_dir == rhs->comp_dir; | |
11798 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11799 | } |
11800 | ||
11801 | /* Allocate a hash table for DWO files. */ | |
11802 | ||
11803 | static htab_t | |
11804 | allocate_dwo_file_hash_table (void) | |
11805 | { | |
11806 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11807 | ||
11808 | return htab_create_alloc_ex (41, | |
11809 | hash_dwo_file, | |
11810 | eq_dwo_file, | |
11811 | NULL, | |
11812 | &objfile->objfile_obstack, | |
11813 | hashtab_obstack_allocate, | |
11814 | dummy_obstack_deallocate); | |
11815 | } | |
11816 | ||
80626a55 DE |
11817 | /* Lookup DWO file DWO_NAME. */ |
11818 | ||
11819 | static void ** | |
0ac5b59e | 11820 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
11821 | { |
11822 | struct dwo_file find_entry; | |
11823 | void **slot; | |
11824 | ||
11825 | if (dwarf2_per_objfile->dwo_files == NULL) | |
11826 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
11827 | ||
11828 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
11829 | find_entry.dwo_name = dwo_name; |
11830 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
11831 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
11832 | ||
11833 | return slot; | |
11834 | } | |
11835 | ||
3019eac3 DE |
11836 | static hashval_t |
11837 | hash_dwo_unit (const void *item) | |
11838 | { | |
9a3c8263 | 11839 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11840 | |
11841 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11842 | return dwo_unit->signature; | |
11843 | } | |
11844 | ||
11845 | static int | |
11846 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11847 | { | |
9a3c8263 SM |
11848 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11849 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11850 | |
11851 | /* The signature is assumed to be unique within the DWO file. | |
11852 | So while object file CU dwo_id's always have the value zero, | |
11853 | that's OK, assuming each object file DWO file has only one CU, | |
11854 | and that's the rule for now. */ | |
11855 | return lhs->signature == rhs->signature; | |
11856 | } | |
11857 | ||
11858 | /* Allocate a hash table for DWO CUs,TUs. | |
11859 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11860 | ||
11861 | static htab_t | |
11862 | allocate_dwo_unit_table (struct objfile *objfile) | |
11863 | { | |
11864 | /* Start out with a pretty small number. | |
11865 | Generally DWO files contain only one CU and maybe some TUs. */ | |
11866 | return htab_create_alloc_ex (3, | |
11867 | hash_dwo_unit, | |
11868 | eq_dwo_unit, | |
11869 | NULL, | |
11870 | &objfile->objfile_obstack, | |
11871 | hashtab_obstack_allocate, | |
11872 | dummy_obstack_deallocate); | |
11873 | } | |
11874 | ||
80626a55 | 11875 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 11876 | |
19c3d4c9 | 11877 | struct create_dwo_cu_data |
3019eac3 DE |
11878 | { |
11879 | struct dwo_file *dwo_file; | |
19c3d4c9 | 11880 | struct dwo_unit dwo_unit; |
3019eac3 DE |
11881 | }; |
11882 | ||
19c3d4c9 | 11883 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11884 | |
11885 | static void | |
19c3d4c9 DE |
11886 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11887 | const gdb_byte *info_ptr, | |
11888 | struct die_info *comp_unit_die, | |
11889 | int has_children, | |
11890 | void *datap) | |
3019eac3 DE |
11891 | { |
11892 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11893 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11894 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 11895 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 11896 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 11897 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 11898 | struct attribute *attr; |
3019eac3 DE |
11899 | |
11900 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
11901 | if (attr == NULL) | |
11902 | { | |
19c3d4c9 DE |
11903 | complaint (&symfile_complaints, |
11904 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
11905 | " its dwo_id [in module %s]"), | |
9c541725 | 11906 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11907 | return; |
11908 | } | |
11909 | ||
3019eac3 DE |
11910 | dwo_unit->dwo_file = dwo_file; |
11911 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 11912 | dwo_unit->section = section; |
9c541725 | 11913 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11914 | dwo_unit->length = cu->per_cu->length; |
11915 | ||
b4f54984 | 11916 | if (dwarf_read_debug) |
4031ecc5 | 11917 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
11918 | to_underlying (sect_off), |
11919 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
11920 | } |
11921 | ||
33c5cd75 | 11922 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11923 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11924 | |
33c5cd75 DB |
11925 | static void |
11926 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
11927 | htab_t &cus_htab) | |
3019eac3 DE |
11928 | { |
11929 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11930 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11931 | |
33c5cd75 DB |
11932 | dwarf2_read_section (objfile, §ion); |
11933 | info_ptr = section.buffer; | |
3019eac3 DE |
11934 | |
11935 | if (info_ptr == NULL) | |
33c5cd75 | 11936 | return; |
3019eac3 | 11937 | |
b4f54984 | 11938 | if (dwarf_read_debug) |
19c3d4c9 DE |
11939 | { |
11940 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
11941 | get_section_name (§ion), |
11942 | get_section_file_name (§ion)); | |
19c3d4c9 | 11943 | } |
3019eac3 | 11944 | |
33c5cd75 | 11945 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11946 | while (info_ptr < end_ptr) |
11947 | { | |
11948 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
11949 | struct create_dwo_cu_data create_dwo_cu_data; |
11950 | struct dwo_unit *dwo_unit; | |
11951 | void **slot; | |
11952 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 11953 | |
19c3d4c9 DE |
11954 | memset (&create_dwo_cu_data.dwo_unit, 0, |
11955 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
11956 | memset (&per_cu, 0, sizeof (per_cu)); |
11957 | per_cu.objfile = objfile; | |
11958 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
11959 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11960 | per_cu.section = §ion; | |
c5ed0576 | 11961 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
11962 | |
11963 | init_cutu_and_read_dies_no_follow ( | |
11964 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
11965 | info_ptr += per_cu.length; | |
11966 | ||
11967 | // If the unit could not be parsed, skip it. | |
11968 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
11969 | continue; | |
3019eac3 | 11970 | |
33c5cd75 DB |
11971 | if (cus_htab == NULL) |
11972 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 11973 | |
33c5cd75 DB |
11974 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
11975 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
11976 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
11977 | gdb_assert (slot != NULL); | |
11978 | if (*slot != NULL) | |
19c3d4c9 | 11979 | { |
33c5cd75 DB |
11980 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
11981 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 11982 | |
33c5cd75 DB |
11983 | complaint (&symfile_complaints, |
11984 | _("debug cu entry at offset 0x%x is duplicate to" | |
11985 | " the entry at offset 0x%x, signature %s"), | |
11986 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
11987 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 11988 | } |
33c5cd75 | 11989 | *slot = (void *)dwo_unit; |
3019eac3 | 11990 | } |
3019eac3 DE |
11991 | } |
11992 | ||
80626a55 DE |
11993 | /* DWP file .debug_{cu,tu}_index section format: |
11994 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
11995 | ||
d2415c6c DE |
11996 | DWP Version 1: |
11997 | ||
80626a55 DE |
11998 | Both index sections have the same format, and serve to map a 64-bit |
11999 | signature to a set of section numbers. Each section begins with a header, | |
12000 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
12001 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
12002 | aligned at 8-byte boundaries in the file. | |
12003 | ||
d2415c6c DE |
12004 | The index section header consists of: |
12005 | ||
12006 | V, 32 bit version number | |
12007 | -, 32 bits unused | |
12008 | N, 32 bit number of compilation units or type units in the index | |
12009 | M, 32 bit number of slots in the hash table | |
80626a55 | 12010 | |
d2415c6c | 12011 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 12012 | |
d2415c6c DE |
12013 | The hash table begins at offset 16 in the section, and consists of an array |
12014 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
12015 | order of the application binary). Unused slots in the hash table are 0. | |
12016 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 12017 | |
d2415c6c DE |
12018 | The parallel table begins immediately after the hash table |
12019 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
12020 | array of 32-bit indexes (using the byte order of the application binary), | |
12021 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
12022 | table contains a 32-bit index into the pool of section numbers. For unused | |
12023 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 12024 | |
73869dc2 DE |
12025 | The pool of section numbers begins immediately following the hash table |
12026 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
12027 | section numbers consists of an array of 32-bit words (using the byte order | |
12028 | of the application binary). Each item in the array is indexed starting | |
12029 | from 0. The hash table entry provides the index of the first section | |
12030 | number in the set. Additional section numbers in the set follow, and the | |
12031 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
12032 | ||
12033 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
12034 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
12035 | be the second entry. Other members of the set may follow in any order. | |
12036 | ||
12037 | --- | |
12038 | ||
12039 | DWP Version 2: | |
12040 | ||
12041 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
12042 | and the entries in the index tables are now offsets into these sections. | |
12043 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
12044 | section. | |
12045 | ||
12046 | Index Section Contents: | |
12047 | Header | |
12048 | Hash Table of Signatures dwp_hash_table.hash_table | |
12049 | Parallel Table of Indices dwp_hash_table.unit_table | |
12050 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
12051 | Table of Section Sizes dwp_hash_table.v2.sizes | |
12052 | ||
12053 | The index section header consists of: | |
12054 | ||
12055 | V, 32 bit version number | |
12056 | L, 32 bit number of columns in the table of section offsets | |
12057 | N, 32 bit number of compilation units or type units in the index | |
12058 | M, 32 bit number of slots in the hash table | |
12059 | ||
12060 | Numbers are recorded using the byte order of the application binary. | |
12061 | ||
12062 | The hash table has the same format as version 1. | |
12063 | The parallel table of indices has the same format as version 1, | |
12064 | except that the entries are origin-1 indices into the table of sections | |
12065 | offsets and the table of section sizes. | |
12066 | ||
12067 | The table of offsets begins immediately following the parallel table | |
12068 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
12069 | a two-dimensional array of 32-bit words (using the byte order of the | |
12070 | application binary), with L columns and N+1 rows, in row-major order. | |
12071 | Each row in the array is indexed starting from 0. The first row provides | |
12072 | a key to the remaining rows: each column in this row provides an identifier | |
12073 | for a debug section, and the offsets in the same column of subsequent rows | |
12074 | refer to that section. The section identifiers are: | |
12075 | ||
12076 | DW_SECT_INFO 1 .debug_info.dwo | |
12077 | DW_SECT_TYPES 2 .debug_types.dwo | |
12078 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
12079 | DW_SECT_LINE 4 .debug_line.dwo | |
12080 | DW_SECT_LOC 5 .debug_loc.dwo | |
12081 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
12082 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
12083 | DW_SECT_MACRO 8 .debug_macro.dwo | |
12084 | ||
12085 | The offsets provided by the CU and TU index sections are the base offsets | |
12086 | for the contributions made by each CU or TU to the corresponding section | |
12087 | in the package file. Each CU and TU header contains an abbrev_offset | |
12088 | field, used to find the abbreviations table for that CU or TU within the | |
12089 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
12090 | be interpreted as relative to the base offset given in the index section. | |
12091 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
12092 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
12093 | and offsets into other debug sections obtained from DWARF attributes should | |
12094 | also be interpreted as relative to the corresponding base offset. | |
12095 | ||
12096 | The table of sizes begins immediately following the table of offsets. | |
12097 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
12098 | with L columns and N rows, in row-major order. Each row in the array is | |
12099 | indexed starting from 1 (row 0 is shared by the two tables). | |
12100 | ||
12101 | --- | |
12102 | ||
12103 | Hash table lookup is handled the same in version 1 and 2: | |
12104 | ||
12105 | We assume that N and M will not exceed 2^32 - 1. | |
12106 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
12107 | ||
d2415c6c DE |
12108 | Given a 64-bit compilation unit signature or a type signature S, an entry |
12109 | in the hash table is located as follows: | |
80626a55 | 12110 | |
d2415c6c DE |
12111 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
12112 | the low-order k bits all set to 1. | |
80626a55 | 12113 | |
d2415c6c | 12114 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 12115 | |
d2415c6c DE |
12116 | 3) If the hash table entry at index H matches the signature, use that |
12117 | entry. If the hash table entry at index H is unused (all zeroes), | |
12118 | terminate the search: the signature is not present in the table. | |
80626a55 | 12119 | |
d2415c6c | 12120 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 12121 | |
d2415c6c | 12122 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 12123 | to stop at an unused slot or find the match. */ |
80626a55 DE |
12124 | |
12125 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
12126 | .debug_{info,types}.dwo in DWP_FILE. | |
12127 | Returns NULL if there isn't one. | |
12128 | Note: This function processes DWP files only, not DWO files. */ | |
12129 | ||
12130 | static struct dwp_hash_table * | |
12131 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
12132 | { | |
12133 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12134 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 12135 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 12136 | struct dwarf2_section_info *index; |
73869dc2 | 12137 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
12138 | struct dwp_hash_table *htab; |
12139 | ||
12140 | if (is_debug_types) | |
12141 | index = &dwp_file->sections.tu_index; | |
12142 | else | |
12143 | index = &dwp_file->sections.cu_index; | |
12144 | ||
12145 | if (dwarf2_section_empty_p (index)) | |
12146 | return NULL; | |
12147 | dwarf2_read_section (objfile, index); | |
12148 | ||
12149 | index_ptr = index->buffer; | |
12150 | index_end = index_ptr + index->size; | |
12151 | ||
12152 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
12153 | index_ptr += 4; |
12154 | if (version == 2) | |
12155 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
12156 | else | |
12157 | nr_columns = 0; | |
12158 | index_ptr += 4; | |
80626a55 DE |
12159 | nr_units = read_4_bytes (dbfd, index_ptr); |
12160 | index_ptr += 4; | |
12161 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
12162 | index_ptr += 4; | |
12163 | ||
73869dc2 | 12164 | if (version != 1 && version != 2) |
80626a55 | 12165 | { |
21aa081e | 12166 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 12167 | " [in module %s]"), |
21aa081e | 12168 | pulongest (version), dwp_file->name); |
80626a55 DE |
12169 | } |
12170 | if (nr_slots != (nr_slots & -nr_slots)) | |
12171 | { | |
21aa081e | 12172 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 12173 | " is not power of 2 [in module %s]"), |
21aa081e | 12174 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
12175 | } |
12176 | ||
12177 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
12178 | htab->version = version; |
12179 | htab->nr_columns = nr_columns; | |
80626a55 DE |
12180 | htab->nr_units = nr_units; |
12181 | htab->nr_slots = nr_slots; | |
12182 | htab->hash_table = index_ptr; | |
12183 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
12184 | |
12185 | /* Exit early if the table is empty. */ | |
12186 | if (nr_slots == 0 || nr_units == 0 | |
12187 | || (version == 2 && nr_columns == 0)) | |
12188 | { | |
12189 | /* All must be zero. */ | |
12190 | if (nr_slots != 0 || nr_units != 0 | |
12191 | || (version == 2 && nr_columns != 0)) | |
12192 | { | |
12193 | complaint (&symfile_complaints, | |
12194 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
12195 | " all zero [in modules %s]"), | |
12196 | dwp_file->name); | |
12197 | } | |
12198 | return htab; | |
12199 | } | |
12200 | ||
12201 | if (version == 1) | |
12202 | { | |
12203 | htab->section_pool.v1.indices = | |
12204 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12205 | /* It's harder to decide whether the section is too small in v1. | |
12206 | V1 is deprecated anyway so we punt. */ | |
12207 | } | |
12208 | else | |
12209 | { | |
12210 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12211 | int *ids = htab->section_pool.v2.section_ids; | |
12212 | /* Reverse map for error checking. */ | |
12213 | int ids_seen[DW_SECT_MAX + 1]; | |
12214 | int i; | |
12215 | ||
12216 | if (nr_columns < 2) | |
12217 | { | |
12218 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
12219 | " in section table [in module %s]"), | |
12220 | dwp_file->name); | |
12221 | } | |
12222 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
12223 | { | |
12224 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
12225 | " in section table [in module %s]"), | |
12226 | dwp_file->name); | |
12227 | } | |
12228 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
12229 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
12230 | for (i = 0; i < nr_columns; ++i) | |
12231 | { | |
12232 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
12233 | ||
12234 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
12235 | { | |
12236 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
12237 | " in section table [in module %s]"), | |
12238 | id, dwp_file->name); | |
12239 | } | |
12240 | if (ids_seen[id] != -1) | |
12241 | { | |
12242 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
12243 | " id %d in section table [in module %s]"), | |
12244 | id, dwp_file->name); | |
12245 | } | |
12246 | ids_seen[id] = i; | |
12247 | ids[i] = id; | |
12248 | } | |
12249 | /* Must have exactly one info or types section. */ | |
12250 | if (((ids_seen[DW_SECT_INFO] != -1) | |
12251 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
12252 | != 1) | |
12253 | { | |
12254 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
12255 | " DWO info/types section [in module %s]"), | |
12256 | dwp_file->name); | |
12257 | } | |
12258 | /* Must have an abbrev section. */ | |
12259 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
12260 | { | |
12261 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
12262 | " section [in module %s]"), | |
12263 | dwp_file->name); | |
12264 | } | |
12265 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
12266 | htab->section_pool.v2.sizes = | |
12267 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
12268 | * nr_units * nr_columns); | |
12269 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
12270 | * nr_units * nr_columns)) | |
12271 | > index_end) | |
12272 | { | |
12273 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
12274 | " [in module %s]"), | |
12275 | dwp_file->name); | |
12276 | } | |
12277 | } | |
80626a55 DE |
12278 | |
12279 | return htab; | |
12280 | } | |
12281 | ||
12282 | /* Update SECTIONS with the data from SECTP. | |
12283 | ||
12284 | This function is like the other "locate" section routines that are | |
12285 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 12286 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
12287 | |
12288 | The result is non-zero for success, or zero if an error was found. */ | |
12289 | ||
12290 | static int | |
73869dc2 DE |
12291 | locate_v1_virtual_dwo_sections (asection *sectp, |
12292 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
12293 | { |
12294 | const struct dwop_section_names *names = &dwop_section_names; | |
12295 | ||
12296 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12297 | { | |
12298 | /* There can be only one. */ | |
049412e3 | 12299 | if (sections->abbrev.s.section != NULL) |
80626a55 | 12300 | return 0; |
049412e3 | 12301 | sections->abbrev.s.section = sectp; |
80626a55 DE |
12302 | sections->abbrev.size = bfd_get_section_size (sectp); |
12303 | } | |
12304 | else if (section_is_p (sectp->name, &names->info_dwo) | |
12305 | || section_is_p (sectp->name, &names->types_dwo)) | |
12306 | { | |
12307 | /* There can be only one. */ | |
049412e3 | 12308 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 12309 | return 0; |
049412e3 | 12310 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
12311 | sections->info_or_types.size = bfd_get_section_size (sectp); |
12312 | } | |
12313 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12314 | { | |
12315 | /* There can be only one. */ | |
049412e3 | 12316 | if (sections->line.s.section != NULL) |
80626a55 | 12317 | return 0; |
049412e3 | 12318 | sections->line.s.section = sectp; |
80626a55 DE |
12319 | sections->line.size = bfd_get_section_size (sectp); |
12320 | } | |
12321 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12322 | { | |
12323 | /* There can be only one. */ | |
049412e3 | 12324 | if (sections->loc.s.section != NULL) |
80626a55 | 12325 | return 0; |
049412e3 | 12326 | sections->loc.s.section = sectp; |
80626a55 DE |
12327 | sections->loc.size = bfd_get_section_size (sectp); |
12328 | } | |
12329 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12330 | { | |
12331 | /* There can be only one. */ | |
049412e3 | 12332 | if (sections->macinfo.s.section != NULL) |
80626a55 | 12333 | return 0; |
049412e3 | 12334 | sections->macinfo.s.section = sectp; |
80626a55 DE |
12335 | sections->macinfo.size = bfd_get_section_size (sectp); |
12336 | } | |
12337 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12338 | { | |
12339 | /* There can be only one. */ | |
049412e3 | 12340 | if (sections->macro.s.section != NULL) |
80626a55 | 12341 | return 0; |
049412e3 | 12342 | sections->macro.s.section = sectp; |
80626a55 DE |
12343 | sections->macro.size = bfd_get_section_size (sectp); |
12344 | } | |
12345 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12346 | { | |
12347 | /* There can be only one. */ | |
049412e3 | 12348 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 12349 | return 0; |
049412e3 | 12350 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
12351 | sections->str_offsets.size = bfd_get_section_size (sectp); |
12352 | } | |
12353 | else | |
12354 | { | |
12355 | /* No other kind of section is valid. */ | |
12356 | return 0; | |
12357 | } | |
12358 | ||
12359 | return 1; | |
12360 | } | |
12361 | ||
73869dc2 DE |
12362 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
12363 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12364 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12365 | This is for DWP version 1 files. */ | |
80626a55 DE |
12366 | |
12367 | static struct dwo_unit * | |
73869dc2 DE |
12368 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
12369 | uint32_t unit_index, | |
12370 | const char *comp_dir, | |
12371 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
12372 | { |
12373 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
12374 | const struct dwp_hash_table *dwp_htab = |
12375 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
12376 | bfd *dbfd = dwp_file->dbfd; |
12377 | const char *kind = is_debug_types ? "TU" : "CU"; | |
12378 | struct dwo_file *dwo_file; | |
12379 | struct dwo_unit *dwo_unit; | |
73869dc2 | 12380 | struct virtual_v1_dwo_sections sections; |
80626a55 | 12381 | void **dwo_file_slot; |
80626a55 DE |
12382 | int i; |
12383 | ||
73869dc2 DE |
12384 | gdb_assert (dwp_file->version == 1); |
12385 | ||
b4f54984 | 12386 | if (dwarf_read_debug) |
80626a55 | 12387 | { |
73869dc2 | 12388 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 12389 | kind, |
73869dc2 | 12390 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
12391 | dwp_file->name); |
12392 | } | |
12393 | ||
19ac8c2e | 12394 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
12395 | Put a limit on the number of sections we look for so that bad data |
12396 | doesn't cause us to loop forever. */ | |
12397 | ||
73869dc2 | 12398 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
12399 | (1 /* .debug_info or .debug_types */ \ |
12400 | + 1 /* .debug_abbrev */ \ | |
12401 | + 1 /* .debug_line */ \ | |
12402 | + 1 /* .debug_loc */ \ | |
12403 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 12404 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
12405 | + 1 /* trailing zero */) |
12406 | ||
12407 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 12408 | |
73869dc2 | 12409 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
12410 | { |
12411 | asection *sectp; | |
12412 | uint32_t section_nr = | |
12413 | read_4_bytes (dbfd, | |
73869dc2 DE |
12414 | dwp_htab->section_pool.v1.indices |
12415 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
12416 | |
12417 | if (section_nr == 0) | |
12418 | break; | |
12419 | if (section_nr >= dwp_file->num_sections) | |
12420 | { | |
12421 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
12422 | " [in module %s]"), | |
12423 | dwp_file->name); | |
12424 | } | |
12425 | ||
12426 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 12427 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
12428 | { |
12429 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
12430 | " [in module %s]"), | |
12431 | dwp_file->name); | |
12432 | } | |
12433 | } | |
12434 | ||
12435 | if (i < 2 | |
a32a8923 DE |
12436 | || dwarf2_section_empty_p (§ions.info_or_types) |
12437 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
12438 | { |
12439 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
12440 | " [in module %s]"), | |
12441 | dwp_file->name); | |
12442 | } | |
73869dc2 | 12443 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
12444 | { |
12445 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
12446 | " [in module %s]"), | |
12447 | dwp_file->name); | |
12448 | } | |
12449 | ||
12450 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12451 | have dwo_unit "live" in that. At least for now. | |
12452 | ||
12453 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 12454 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
12455 | file, we can combine them back into a virtual DWO file to save space |
12456 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
12457 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
12458 | ||
791afaa2 TT |
12459 | std::string virtual_dwo_name = |
12460 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
12461 | get_section_id (§ions.abbrev), | |
12462 | get_section_id (§ions.line), | |
12463 | get_section_id (§ions.loc), | |
12464 | get_section_id (§ions.str_offsets)); | |
80626a55 | 12465 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 12466 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
80626a55 DE |
12467 | /* Create one if necessary. */ |
12468 | if (*dwo_file_slot == NULL) | |
12469 | { | |
b4f54984 | 12470 | if (dwarf_read_debug) |
80626a55 DE |
12471 | { |
12472 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12473 | virtual_dwo_name.c_str ()); |
80626a55 DE |
12474 | } |
12475 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
12476 | dwo_file->dwo_name |
12477 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
12478 | virtual_dwo_name.c_str (), |
12479 | virtual_dwo_name.size ()); | |
0ac5b59e | 12480 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
12481 | dwo_file->sections.abbrev = sections.abbrev; |
12482 | dwo_file->sections.line = sections.line; | |
12483 | dwo_file->sections.loc = sections.loc; | |
12484 | dwo_file->sections.macinfo = sections.macinfo; | |
12485 | dwo_file->sections.macro = sections.macro; | |
12486 | dwo_file->sections.str_offsets = sections.str_offsets; | |
12487 | /* The "str" section is global to the entire DWP file. */ | |
12488 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 12489 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
12490 | there's no need to record it in dwo_file. |
12491 | Also, we can't simply record type sections in dwo_file because | |
12492 | we record a pointer into the vector in dwo_unit. As we collect more | |
12493 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
12494 | for it, invalidating all copies of pointers into the previous |
12495 | contents. */ | |
80626a55 DE |
12496 | *dwo_file_slot = dwo_file; |
12497 | } | |
12498 | else | |
12499 | { | |
b4f54984 | 12500 | if (dwarf_read_debug) |
80626a55 DE |
12501 | { |
12502 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12503 | virtual_dwo_name.c_str ()); |
80626a55 | 12504 | } |
9a3c8263 | 12505 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 12506 | } |
80626a55 DE |
12507 | |
12508 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12509 | dwo_unit->dwo_file = dwo_file; | |
12510 | dwo_unit->signature = signature; | |
8d749320 SM |
12511 | dwo_unit->section = |
12512 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 12513 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 12514 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
12515 | |
12516 | return dwo_unit; | |
12517 | } | |
12518 | ||
73869dc2 DE |
12519 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
12520 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
12521 | piece within that section used by a TU/CU, return a virtual section | |
12522 | of just that piece. */ | |
12523 | ||
12524 | static struct dwarf2_section_info | |
12525 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
12526 | bfd_size_type offset, bfd_size_type size) | |
12527 | { | |
12528 | struct dwarf2_section_info result; | |
12529 | asection *sectp; | |
12530 | ||
12531 | gdb_assert (section != NULL); | |
12532 | gdb_assert (!section->is_virtual); | |
12533 | ||
12534 | memset (&result, 0, sizeof (result)); | |
12535 | result.s.containing_section = section; | |
12536 | result.is_virtual = 1; | |
12537 | ||
12538 | if (size == 0) | |
12539 | return result; | |
12540 | ||
12541 | sectp = get_section_bfd_section (section); | |
12542 | ||
12543 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
12544 | bounds of the real section. This is a pretty-rare event, so just | |
12545 | flag an error (easier) instead of a warning and trying to cope. */ | |
12546 | if (sectp == NULL | |
12547 | || offset + size > bfd_get_section_size (sectp)) | |
12548 | { | |
73869dc2 DE |
12549 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
12550 | " in section %s [in module %s]"), | |
12551 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
12552 | objfile_name (dwarf2_per_objfile->objfile)); | |
12553 | } | |
12554 | ||
12555 | result.virtual_offset = offset; | |
12556 | result.size = size; | |
12557 | return result; | |
12558 | } | |
12559 | ||
12560 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
12561 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12562 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12563 | This is for DWP version 2 files. */ | |
12564 | ||
12565 | static struct dwo_unit * | |
12566 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
12567 | uint32_t unit_index, | |
12568 | const char *comp_dir, | |
12569 | ULONGEST signature, int is_debug_types) | |
12570 | { | |
12571 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12572 | const struct dwp_hash_table *dwp_htab = | |
12573 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12574 | bfd *dbfd = dwp_file->dbfd; | |
12575 | const char *kind = is_debug_types ? "TU" : "CU"; | |
12576 | struct dwo_file *dwo_file; | |
12577 | struct dwo_unit *dwo_unit; | |
12578 | struct virtual_v2_dwo_sections sections; | |
12579 | void **dwo_file_slot; | |
73869dc2 DE |
12580 | int i; |
12581 | ||
12582 | gdb_assert (dwp_file->version == 2); | |
12583 | ||
b4f54984 | 12584 | if (dwarf_read_debug) |
73869dc2 DE |
12585 | { |
12586 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
12587 | kind, | |
12588 | pulongest (unit_index), hex_string (signature), | |
12589 | dwp_file->name); | |
12590 | } | |
12591 | ||
12592 | /* Fetch the section offsets of this DWO unit. */ | |
12593 | ||
12594 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
12595 | |
12596 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
12597 | { | |
12598 | uint32_t offset = read_4_bytes (dbfd, | |
12599 | dwp_htab->section_pool.v2.offsets | |
12600 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12601 | + i) | |
12602 | * sizeof (uint32_t))); | |
12603 | uint32_t size = read_4_bytes (dbfd, | |
12604 | dwp_htab->section_pool.v2.sizes | |
12605 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12606 | + i) | |
12607 | * sizeof (uint32_t))); | |
12608 | ||
12609 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
12610 | { | |
12611 | case DW_SECT_INFO: | |
12612 | case DW_SECT_TYPES: | |
12613 | sections.info_or_types_offset = offset; | |
12614 | sections.info_or_types_size = size; | |
12615 | break; | |
12616 | case DW_SECT_ABBREV: | |
12617 | sections.abbrev_offset = offset; | |
12618 | sections.abbrev_size = size; | |
12619 | break; | |
12620 | case DW_SECT_LINE: | |
12621 | sections.line_offset = offset; | |
12622 | sections.line_size = size; | |
12623 | break; | |
12624 | case DW_SECT_LOC: | |
12625 | sections.loc_offset = offset; | |
12626 | sections.loc_size = size; | |
12627 | break; | |
12628 | case DW_SECT_STR_OFFSETS: | |
12629 | sections.str_offsets_offset = offset; | |
12630 | sections.str_offsets_size = size; | |
12631 | break; | |
12632 | case DW_SECT_MACINFO: | |
12633 | sections.macinfo_offset = offset; | |
12634 | sections.macinfo_size = size; | |
12635 | break; | |
12636 | case DW_SECT_MACRO: | |
12637 | sections.macro_offset = offset; | |
12638 | sections.macro_size = size; | |
12639 | break; | |
12640 | } | |
12641 | } | |
12642 | ||
12643 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12644 | have dwo_unit "live" in that. At least for now. | |
12645 | ||
12646 | The DWP file can be made up of a random collection of CUs and TUs. | |
12647 | However, for each CU + set of TUs that came from the same original DWO | |
12648 | file, we can combine them back into a virtual DWO file to save space | |
12649 | (fewer struct dwo_file objects to allocate). Remember that for really | |
12650 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
12651 | ||
791afaa2 TT |
12652 | std::string virtual_dwo_name = |
12653 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
12654 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
12655 | (long) (sections.line_size ? sections.line_offset : 0), | |
12656 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
12657 | (long) (sections.str_offsets_size | |
12658 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 12659 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 12660 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
73869dc2 DE |
12661 | /* Create one if necessary. */ |
12662 | if (*dwo_file_slot == NULL) | |
12663 | { | |
b4f54984 | 12664 | if (dwarf_read_debug) |
73869dc2 DE |
12665 | { |
12666 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12667 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
12668 | } |
12669 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
12670 | dwo_file->dwo_name |
12671 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
12672 | virtual_dwo_name.c_str (), |
12673 | virtual_dwo_name.size ()); | |
73869dc2 DE |
12674 | dwo_file->comp_dir = comp_dir; |
12675 | dwo_file->sections.abbrev = | |
12676 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
12677 | sections.abbrev_offset, sections.abbrev_size); | |
12678 | dwo_file->sections.line = | |
12679 | create_dwp_v2_section (&dwp_file->sections.line, | |
12680 | sections.line_offset, sections.line_size); | |
12681 | dwo_file->sections.loc = | |
12682 | create_dwp_v2_section (&dwp_file->sections.loc, | |
12683 | sections.loc_offset, sections.loc_size); | |
12684 | dwo_file->sections.macinfo = | |
12685 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
12686 | sections.macinfo_offset, sections.macinfo_size); | |
12687 | dwo_file->sections.macro = | |
12688 | create_dwp_v2_section (&dwp_file->sections.macro, | |
12689 | sections.macro_offset, sections.macro_size); | |
12690 | dwo_file->sections.str_offsets = | |
12691 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
12692 | sections.str_offsets_offset, | |
12693 | sections.str_offsets_size); | |
12694 | /* The "str" section is global to the entire DWP file. */ | |
12695 | dwo_file->sections.str = dwp_file->sections.str; | |
12696 | /* The info or types section is assigned below to dwo_unit, | |
12697 | there's no need to record it in dwo_file. | |
12698 | Also, we can't simply record type sections in dwo_file because | |
12699 | we record a pointer into the vector in dwo_unit. As we collect more | |
12700 | types we'll grow the vector and eventually have to reallocate space | |
12701 | for it, invalidating all copies of pointers into the previous | |
12702 | contents. */ | |
12703 | *dwo_file_slot = dwo_file; | |
12704 | } | |
12705 | else | |
12706 | { | |
b4f54984 | 12707 | if (dwarf_read_debug) |
73869dc2 DE |
12708 | { |
12709 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12710 | virtual_dwo_name.c_str ()); |
73869dc2 | 12711 | } |
9a3c8263 | 12712 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 12713 | } |
73869dc2 DE |
12714 | |
12715 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12716 | dwo_unit->dwo_file = dwo_file; | |
12717 | dwo_unit->signature = signature; | |
8d749320 SM |
12718 | dwo_unit->section = |
12719 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
12720 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
12721 | ? &dwp_file->sections.types | |
12722 | : &dwp_file->sections.info, | |
12723 | sections.info_or_types_offset, | |
12724 | sections.info_or_types_size); | |
12725 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
12726 | ||
12727 | return dwo_unit; | |
12728 | } | |
12729 | ||
57d63ce2 DE |
12730 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
12731 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
12732 | |
12733 | static struct dwo_unit * | |
57d63ce2 DE |
12734 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
12735 | ULONGEST signature, int is_debug_types) | |
80626a55 | 12736 | { |
57d63ce2 DE |
12737 | const struct dwp_hash_table *dwp_htab = |
12738 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 12739 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 12740 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
12741 | uint32_t hash = signature & mask; |
12742 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
12743 | unsigned int i; | |
12744 | void **slot; | |
870f88f7 | 12745 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
12746 | |
12747 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
12748 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
12749 | slot = htab_find_slot (is_debug_types |
12750 | ? dwp_file->loaded_tus | |
12751 | : dwp_file->loaded_cus, | |
12752 | &find_dwo_cu, INSERT); | |
80626a55 DE |
12753 | |
12754 | if (*slot != NULL) | |
9a3c8263 | 12755 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12756 | |
12757 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 12758 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
12759 | { |
12760 | ULONGEST signature_in_table; | |
12761 | ||
12762 | signature_in_table = | |
57d63ce2 | 12763 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
12764 | if (signature_in_table == signature) |
12765 | { | |
57d63ce2 DE |
12766 | uint32_t unit_index = |
12767 | read_4_bytes (dbfd, | |
12768 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 12769 | |
73869dc2 DE |
12770 | if (dwp_file->version == 1) |
12771 | { | |
12772 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
12773 | comp_dir, signature, | |
12774 | is_debug_types); | |
12775 | } | |
12776 | else | |
12777 | { | |
12778 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
12779 | comp_dir, signature, | |
12780 | is_debug_types); | |
12781 | } | |
9a3c8263 | 12782 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12783 | } |
12784 | if (signature_in_table == 0) | |
12785 | return NULL; | |
12786 | hash = (hash + hash2) & mask; | |
12787 | } | |
12788 | ||
12789 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
12790 | " [in module %s]"), | |
12791 | dwp_file->name); | |
12792 | } | |
12793 | ||
ab5088bf | 12794 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
12795 | Open the file specified by FILE_NAME and hand it off to BFD for |
12796 | preliminary analysis. Return a newly initialized bfd *, which | |
12797 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12798 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12799 | SEARCH_CWD is true if the current directory is to be searched. |
12800 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12801 | If successful, the file is added to the bfd include table of the |
12802 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12803 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12804 | NOTE: This function is derived from symfile_bfd_open. */ |
12805 | ||
192b62ce | 12806 | static gdb_bfd_ref_ptr |
6ac97d4c | 12807 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 12808 | { |
80626a55 | 12809 | int desc, flags; |
3019eac3 | 12810 | char *absolute_name; |
9c02c129 DE |
12811 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12812 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12813 | to debug_file_directory. */ | |
12814 | char *search_path; | |
12815 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
12816 | ||
6ac97d4c DE |
12817 | if (search_cwd) |
12818 | { | |
12819 | if (*debug_file_directory != '\0') | |
12820 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 12821 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
12822 | else |
12823 | search_path = xstrdup ("."); | |
12824 | } | |
9c02c129 | 12825 | else |
6ac97d4c | 12826 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 12827 | |
492c0ab7 | 12828 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12829 | if (is_dwp) |
12830 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 12831 | desc = openp (search_path, flags, file_name, |
3019eac3 | 12832 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 12833 | xfree (search_path); |
3019eac3 DE |
12834 | if (desc < 0) |
12835 | return NULL; | |
12836 | ||
192b62ce | 12837 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 12838 | xfree (absolute_name); |
9c02c129 DE |
12839 | if (sym_bfd == NULL) |
12840 | return NULL; | |
192b62ce | 12841 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12842 | |
192b62ce TT |
12843 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12844 | return NULL; | |
3019eac3 | 12845 | |
13aaf454 DE |
12846 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12847 | This is important because things like demangled_names_hash lives in the | |
12848 | objfile's per_bfd space and may have references to things like symbol | |
12849 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12850 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12851 | |
3019eac3 DE |
12852 | return sym_bfd; |
12853 | } | |
12854 | ||
ab5088bf | 12855 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12856 | COMP_DIR is the DW_AT_comp_dir attribute. |
12857 | The result is the bfd handle of the file. | |
12858 | If there is a problem finding or opening the file, return NULL. | |
12859 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12860 | same as symfile_bfd_open. */ | |
12861 | ||
192b62ce | 12862 | static gdb_bfd_ref_ptr |
ab5088bf | 12863 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 12864 | { |
80626a55 | 12865 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 12866 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
12867 | |
12868 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12869 | ||
12870 | if (comp_dir != NULL) | |
12871 | { | |
b36cec19 PA |
12872 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
12873 | file_name, (char *) NULL); | |
3019eac3 DE |
12874 | |
12875 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12876 | search path, which seems useful. */ | |
192b62ce TT |
12877 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
12878 | 1 /*search_cwd*/)); | |
3019eac3 DE |
12879 | xfree (path_to_try); |
12880 | if (abfd != NULL) | |
12881 | return abfd; | |
12882 | } | |
12883 | ||
12884 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12885 | is a list of paths. */ | |
12886 | ||
12887 | if (*debug_file_directory == '\0') | |
12888 | return NULL; | |
12889 | ||
6ac97d4c | 12890 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
12891 | } |
12892 | ||
80626a55 DE |
12893 | /* This function is mapped across the sections and remembers the offset and |
12894 | size of each of the DWO debugging sections we are interested in. */ | |
12895 | ||
12896 | static void | |
12897 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12898 | { | |
9a3c8263 | 12899 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12900 | const struct dwop_section_names *names = &dwop_section_names; |
12901 | ||
12902 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12903 | { | |
049412e3 | 12904 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
12905 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
12906 | } | |
12907 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12908 | { | |
049412e3 | 12909 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
12910 | dwo_sections->info.size = bfd_get_section_size (sectp); |
12911 | } | |
12912 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12913 | { | |
049412e3 | 12914 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
12915 | dwo_sections->line.size = bfd_get_section_size (sectp); |
12916 | } | |
12917 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12918 | { | |
049412e3 | 12919 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
12920 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
12921 | } | |
12922 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12923 | { | |
049412e3 | 12924 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
12925 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
12926 | } | |
12927 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12928 | { | |
049412e3 | 12929 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
12930 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
12931 | } | |
12932 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12933 | { | |
049412e3 | 12934 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
12935 | dwo_sections->str.size = bfd_get_section_size (sectp); |
12936 | } | |
12937 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12938 | { | |
049412e3 | 12939 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
12940 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
12941 | } | |
12942 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12943 | { | |
12944 | struct dwarf2_section_info type_section; | |
12945 | ||
12946 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12947 | type_section.s.section = sectp; |
80626a55 DE |
12948 | type_section.size = bfd_get_section_size (sectp); |
12949 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
12950 | &type_section); | |
12951 | } | |
12952 | } | |
12953 | ||
ab5088bf | 12954 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12955 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12956 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12957 | |
12958 | static struct dwo_file * | |
0ac5b59e DE |
12959 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
12960 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
12961 | { |
12962 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 12963 | struct dwo_file *dwo_file; |
3019eac3 DE |
12964 | struct cleanup *cleanups; |
12965 | ||
192b62ce | 12966 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
12967 | if (dbfd == NULL) |
12968 | { | |
b4f54984 | 12969 | if (dwarf_read_debug) |
80626a55 DE |
12970 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
12971 | return NULL; | |
12972 | } | |
12973 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
12974 | dwo_file->dwo_name = dwo_name; |
12975 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 12976 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
12977 | |
12978 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
12979 | ||
192b62ce TT |
12980 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
12981 | &dwo_file->sections); | |
3019eac3 | 12982 | |
33c5cd75 | 12983 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 12984 | |
78d4d2c5 JK |
12985 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
12986 | dwo_file->tus); | |
3019eac3 DE |
12987 | |
12988 | discard_cleanups (cleanups); | |
12989 | ||
b4f54984 | 12990 | if (dwarf_read_debug) |
80626a55 DE |
12991 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
12992 | ||
3019eac3 DE |
12993 | return dwo_file; |
12994 | } | |
12995 | ||
80626a55 | 12996 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12997 | size of each of the DWP debugging sections common to version 1 and 2 that |
12998 | we are interested in. */ | |
3019eac3 | 12999 | |
80626a55 | 13000 | static void |
73869dc2 DE |
13001 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
13002 | void *dwp_file_ptr) | |
3019eac3 | 13003 | { |
9a3c8263 | 13004 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
13005 | const struct dwop_section_names *names = &dwop_section_names; |
13006 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 13007 | |
80626a55 | 13008 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 13009 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
13010 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
13011 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 13012 | |
80626a55 DE |
13013 | /* Look for specific sections that we need. */ |
13014 | if (section_is_p (sectp->name, &names->str_dwo)) | |
13015 | { | |
049412e3 | 13016 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
13017 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
13018 | } | |
13019 | else if (section_is_p (sectp->name, &names->cu_index)) | |
13020 | { | |
049412e3 | 13021 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
13022 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
13023 | } | |
13024 | else if (section_is_p (sectp->name, &names->tu_index)) | |
13025 | { | |
049412e3 | 13026 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
13027 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
13028 | } | |
13029 | } | |
3019eac3 | 13030 | |
73869dc2 DE |
13031 | /* This function is mapped across the sections and remembers the offset and |
13032 | size of each of the DWP version 2 debugging sections that we are interested | |
13033 | in. This is split into a separate function because we don't know if we | |
13034 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
13035 | ||
13036 | static void | |
13037 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
13038 | { | |
9a3c8263 | 13039 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
13040 | const struct dwop_section_names *names = &dwop_section_names; |
13041 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
13042 | ||
13043 | /* Record the ELF section number for later lookup: this is what the | |
13044 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
13045 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
13046 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
13047 | ||
13048 | /* Look for specific sections that we need. */ | |
13049 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
13050 | { | |
049412e3 | 13051 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
13052 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
13053 | } | |
13054 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
13055 | { | |
049412e3 | 13056 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
13057 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
13058 | } | |
13059 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
13060 | { | |
049412e3 | 13061 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
13062 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
13063 | } | |
13064 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
13065 | { | |
049412e3 | 13066 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
13067 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
13068 | } | |
13069 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
13070 | { | |
049412e3 | 13071 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
13072 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
13073 | } | |
13074 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
13075 | { | |
049412e3 | 13076 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
13077 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
13078 | } | |
13079 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
13080 | { | |
049412e3 | 13081 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
13082 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
13083 | } | |
13084 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
13085 | { | |
049412e3 | 13086 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
13087 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
13088 | } | |
13089 | } | |
13090 | ||
80626a55 | 13091 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13092 | |
80626a55 DE |
13093 | static hashval_t |
13094 | hash_dwp_loaded_cutus (const void *item) | |
13095 | { | |
9a3c8263 | 13096 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 13097 | |
80626a55 DE |
13098 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
13099 | return dwo_unit->signature; | |
3019eac3 DE |
13100 | } |
13101 | ||
80626a55 | 13102 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13103 | |
80626a55 DE |
13104 | static int |
13105 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 13106 | { |
9a3c8263 SM |
13107 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
13108 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 13109 | |
80626a55 DE |
13110 | return dua->signature == dub->signature; |
13111 | } | |
3019eac3 | 13112 | |
80626a55 | 13113 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13114 | |
80626a55 DE |
13115 | static htab_t |
13116 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
13117 | { | |
13118 | return htab_create_alloc_ex (3, | |
13119 | hash_dwp_loaded_cutus, | |
13120 | eq_dwp_loaded_cutus, | |
13121 | NULL, | |
13122 | &objfile->objfile_obstack, | |
13123 | hashtab_obstack_allocate, | |
13124 | dummy_obstack_deallocate); | |
13125 | } | |
3019eac3 | 13126 | |
ab5088bf DE |
13127 | /* Try to open DWP file FILE_NAME. |
13128 | The result is the bfd handle of the file. | |
13129 | If there is a problem finding or opening the file, return NULL. | |
13130 | Upon success, the canonicalized path of the file is stored in the bfd, | |
13131 | same as symfile_bfd_open. */ | |
13132 | ||
192b62ce | 13133 | static gdb_bfd_ref_ptr |
ab5088bf DE |
13134 | open_dwp_file (const char *file_name) |
13135 | { | |
192b62ce TT |
13136 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
13137 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
13138 | if (abfd != NULL) |
13139 | return abfd; | |
13140 | ||
13141 | /* Work around upstream bug 15652. | |
13142 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
13143 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
13144 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
13145 | of the executable's path may have discarded the needed info. | |
13146 | [IWBN if the dwp file name was recorded in the executable, akin to | |
13147 | .gnu_debuglink, but that doesn't exist yet.] | |
13148 | Strip the directory from FILE_NAME and search again. */ | |
13149 | if (*debug_file_directory != '\0') | |
13150 | { | |
13151 | /* Don't implicitly search the current directory here. | |
13152 | If the user wants to search "." to handle this case, | |
13153 | it must be added to debug-file-directory. */ | |
13154 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
13155 | 0 /*search_cwd*/); | |
13156 | } | |
13157 | ||
13158 | return NULL; | |
ab5088bf DE |
13159 | } |
13160 | ||
80626a55 DE |
13161 | /* Initialize the use of the DWP file for the current objfile. |
13162 | By convention the name of the DWP file is ${objfile}.dwp. | |
13163 | The result is NULL if it can't be found. */ | |
a766d390 | 13164 | |
80626a55 | 13165 | static struct dwp_file * |
ab5088bf | 13166 | open_and_init_dwp_file (void) |
80626a55 DE |
13167 | { |
13168 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13169 | struct dwp_file *dwp_file; | |
80626a55 | 13170 | |
82bf32bc JK |
13171 | /* Try to find first .dwp for the binary file before any symbolic links |
13172 | resolving. */ | |
6c447423 DE |
13173 | |
13174 | /* If the objfile is a debug file, find the name of the real binary | |
13175 | file and get the name of dwp file from there. */ | |
d721ba37 | 13176 | std::string dwp_name; |
6c447423 DE |
13177 | if (objfile->separate_debug_objfile_backlink != NULL) |
13178 | { | |
13179 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
13180 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 13181 | |
d721ba37 | 13182 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
13183 | } |
13184 | else | |
d721ba37 PA |
13185 | dwp_name = objfile->original_name; |
13186 | ||
13187 | dwp_name += ".dwp"; | |
80626a55 | 13188 | |
d721ba37 | 13189 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
13190 | if (dbfd == NULL |
13191 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
13192 | { | |
13193 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
13194 | dwp_name = objfile_name (objfile); |
13195 | dwp_name += ".dwp"; | |
13196 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
13197 | } |
13198 | ||
80626a55 DE |
13199 | if (dbfd == NULL) |
13200 | { | |
b4f54984 | 13201 | if (dwarf_read_debug) |
d721ba37 | 13202 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 13203 | return NULL; |
3019eac3 | 13204 | } |
80626a55 | 13205 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
13206 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
13207 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 13208 | |
80626a55 | 13209 | /* +1: section 0 is unused */ |
192b62ce | 13210 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
13211 | dwp_file->elf_sections = |
13212 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
13213 | dwp_file->num_sections, asection *); | |
13214 | ||
192b62ce TT |
13215 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
13216 | dwp_file); | |
80626a55 DE |
13217 | |
13218 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
13219 | ||
13220 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
13221 | ||
73869dc2 | 13222 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
13223 | if (dwp_file->cus && dwp_file->tus |
13224 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
13225 | { |
13226 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 13227 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 13228 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
13229 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
13230 | " TU version %s [in DWP file %s]"), | |
13231 | pulongest (dwp_file->cus->version), | |
d721ba37 | 13232 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 13233 | } |
08302ed2 DE |
13234 | |
13235 | if (dwp_file->cus) | |
13236 | dwp_file->version = dwp_file->cus->version; | |
13237 | else if (dwp_file->tus) | |
13238 | dwp_file->version = dwp_file->tus->version; | |
13239 | else | |
13240 | dwp_file->version = 2; | |
73869dc2 DE |
13241 | |
13242 | if (dwp_file->version == 2) | |
192b62ce TT |
13243 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
13244 | dwp_file); | |
73869dc2 | 13245 | |
19ac8c2e DE |
13246 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
13247 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 13248 | |
b4f54984 | 13249 | if (dwarf_read_debug) |
80626a55 DE |
13250 | { |
13251 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
13252 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
13253 | " %s CUs, %s TUs\n", |
13254 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
13255 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
13256 | } |
13257 | ||
13258 | return dwp_file; | |
3019eac3 | 13259 | } |
c906108c | 13260 | |
ab5088bf DE |
13261 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
13262 | ||
13263 | static struct dwp_file * | |
13264 | get_dwp_file (void) | |
13265 | { | |
13266 | if (! dwarf2_per_objfile->dwp_checked) | |
13267 | { | |
13268 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
13269 | dwarf2_per_objfile->dwp_checked = 1; | |
13270 | } | |
13271 | return dwarf2_per_objfile->dwp_file; | |
13272 | } | |
13273 | ||
80626a55 DE |
13274 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
13275 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
13276 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 13277 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
13278 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
13279 | ||
13280 | This is called, for example, when wanting to read a variable with a | |
13281 | complex location. Therefore we don't want to do file i/o for every call. | |
13282 | Therefore we don't want to look for a DWO file on every call. | |
13283 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
13284 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
13285 | for a DWO file. | |
13286 | ||
1c658ad5 | 13287 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 13288 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 13289 | |
3019eac3 | 13290 | static struct dwo_unit * |
80626a55 DE |
13291 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
13292 | const char *dwo_name, const char *comp_dir, | |
13293 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
13294 | { |
13295 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
13296 | const char *kind = is_debug_types ? "TU" : "CU"; |
13297 | void **dwo_file_slot; | |
3019eac3 | 13298 | struct dwo_file *dwo_file; |
80626a55 | 13299 | struct dwp_file *dwp_file; |
cb1df416 | 13300 | |
6a506a2d DE |
13301 | /* First see if there's a DWP file. |
13302 | If we have a DWP file but didn't find the DWO inside it, don't | |
13303 | look for the original DWO file. It makes gdb behave differently | |
13304 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 13305 | |
ab5088bf | 13306 | dwp_file = get_dwp_file (); |
80626a55 | 13307 | if (dwp_file != NULL) |
cf2c3c16 | 13308 | { |
80626a55 DE |
13309 | const struct dwp_hash_table *dwp_htab = |
13310 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
13311 | ||
13312 | if (dwp_htab != NULL) | |
13313 | { | |
13314 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
13315 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
13316 | signature, is_debug_types); | |
80626a55 DE |
13317 | |
13318 | if (dwo_cutu != NULL) | |
13319 | { | |
b4f54984 | 13320 | if (dwarf_read_debug) |
80626a55 DE |
13321 | { |
13322 | fprintf_unfiltered (gdb_stdlog, | |
13323 | "Virtual DWO %s %s found: @%s\n", | |
13324 | kind, hex_string (signature), | |
13325 | host_address_to_string (dwo_cutu)); | |
13326 | } | |
13327 | return dwo_cutu; | |
13328 | } | |
13329 | } | |
13330 | } | |
6a506a2d | 13331 | else |
80626a55 | 13332 | { |
6a506a2d | 13333 | /* No DWP file, look for the DWO file. */ |
80626a55 | 13334 | |
6a506a2d DE |
13335 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
13336 | if (*dwo_file_slot == NULL) | |
80626a55 | 13337 | { |
6a506a2d DE |
13338 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
13339 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 13340 | } |
6a506a2d | 13341 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 13342 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 13343 | |
6a506a2d | 13344 | if (dwo_file != NULL) |
19c3d4c9 | 13345 | { |
6a506a2d DE |
13346 | struct dwo_unit *dwo_cutu = NULL; |
13347 | ||
13348 | if (is_debug_types && dwo_file->tus) | |
13349 | { | |
13350 | struct dwo_unit find_dwo_cutu; | |
13351 | ||
13352 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13353 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
13354 | dwo_cutu |
13355 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 13356 | } |
33c5cd75 | 13357 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 13358 | { |
33c5cd75 DB |
13359 | struct dwo_unit find_dwo_cutu; |
13360 | ||
13361 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13362 | find_dwo_cutu.signature = signature; | |
13363 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
13364 | &find_dwo_cutu); | |
6a506a2d DE |
13365 | } |
13366 | ||
13367 | if (dwo_cutu != NULL) | |
13368 | { | |
b4f54984 | 13369 | if (dwarf_read_debug) |
6a506a2d DE |
13370 | { |
13371 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
13372 | kind, dwo_name, hex_string (signature), | |
13373 | host_address_to_string (dwo_cutu)); | |
13374 | } | |
13375 | return dwo_cutu; | |
80626a55 DE |
13376 | } |
13377 | } | |
2e276125 | 13378 | } |
9cdd5dbd | 13379 | |
80626a55 DE |
13380 | /* We didn't find it. This could mean a dwo_id mismatch, or |
13381 | someone deleted the DWO/DWP file, or the search path isn't set up | |
13382 | correctly to find the file. */ | |
13383 | ||
b4f54984 | 13384 | if (dwarf_read_debug) |
80626a55 DE |
13385 | { |
13386 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
13387 | kind, dwo_name, hex_string (signature)); | |
13388 | } | |
3019eac3 | 13389 | |
6656a72d DE |
13390 | /* This is a warning and not a complaint because it can be caused by |
13391 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
13392 | { |
13393 | /* Print the name of the DWP file if we looked there, helps the user | |
13394 | better diagnose the problem. */ | |
791afaa2 | 13395 | std::string dwp_text; |
43942612 DE |
13396 | |
13397 | if (dwp_file != NULL) | |
791afaa2 TT |
13398 | dwp_text = string_printf (" [in DWP file %s]", |
13399 | lbasename (dwp_file->name)); | |
43942612 DE |
13400 | |
13401 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
13402 | " [in module %s]"), | |
13403 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 13404 | dwp_text.c_str (), |
43942612 | 13405 | this_unit->is_debug_types ? "TU" : "CU", |
9c541725 | 13406 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 13407 | } |
3019eac3 | 13408 | return NULL; |
5fb290d7 DJ |
13409 | } |
13410 | ||
80626a55 DE |
13411 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
13412 | See lookup_dwo_cutu_unit for details. */ | |
13413 | ||
13414 | static struct dwo_unit * | |
13415 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
13416 | const char *dwo_name, const char *comp_dir, | |
13417 | ULONGEST signature) | |
13418 | { | |
13419 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
13420 | } | |
13421 | ||
13422 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
13423 | See lookup_dwo_cutu_unit for details. */ | |
13424 | ||
13425 | static struct dwo_unit * | |
13426 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
13427 | const char *dwo_name, const char *comp_dir) | |
13428 | { | |
13429 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
13430 | } | |
13431 | ||
89e63ee4 DE |
13432 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
13433 | ||
13434 | static int | |
13435 | queue_and_load_dwo_tu (void **slot, void *info) | |
13436 | { | |
13437 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
13438 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
13439 | ULONGEST signature = dwo_unit->signature; | |
13440 | struct signatured_type *sig_type = | |
13441 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
13442 | ||
13443 | if (sig_type != NULL) | |
13444 | { | |
13445 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
13446 | ||
13447 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
13448 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
13449 | while processing PER_CU. */ | |
13450 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
13451 | load_full_type_unit (sig_cu); | |
13452 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
13453 | } | |
13454 | ||
13455 | return 1; | |
13456 | } | |
13457 | ||
13458 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
13459 | The DWO may have the only definition of the type, though it may not be | |
13460 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
13461 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
13462 | ||
13463 | static void | |
13464 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
13465 | { | |
13466 | struct dwo_unit *dwo_unit; | |
13467 | struct dwo_file *dwo_file; | |
13468 | ||
13469 | gdb_assert (!per_cu->is_debug_types); | |
13470 | gdb_assert (get_dwp_file () == NULL); | |
13471 | gdb_assert (per_cu->cu != NULL); | |
13472 | ||
13473 | dwo_unit = per_cu->cu->dwo_unit; | |
13474 | gdb_assert (dwo_unit != NULL); | |
13475 | ||
13476 | dwo_file = dwo_unit->dwo_file; | |
13477 | if (dwo_file->tus != NULL) | |
13478 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
13479 | } | |
13480 | ||
3019eac3 DE |
13481 | /* Free all resources associated with DWO_FILE. |
13482 | Close the DWO file and munmap the sections. | |
13483 | All memory should be on the objfile obstack. */ | |
348e048f DE |
13484 | |
13485 | static void | |
3019eac3 | 13486 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 13487 | { |
348e048f | 13488 | |
5c6fa7ab | 13489 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 13490 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 13491 | |
3019eac3 DE |
13492 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
13493 | } | |
348e048f | 13494 | |
3019eac3 | 13495 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 13496 | |
3019eac3 DE |
13497 | static void |
13498 | free_dwo_file_cleanup (void *arg) | |
13499 | { | |
13500 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
13501 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 13502 | |
3019eac3 DE |
13503 | free_dwo_file (dwo_file, objfile); |
13504 | } | |
348e048f | 13505 | |
3019eac3 | 13506 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 13507 | |
3019eac3 DE |
13508 | static int |
13509 | free_dwo_file_from_slot (void **slot, void *info) | |
13510 | { | |
13511 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
13512 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 13513 | |
3019eac3 | 13514 | free_dwo_file (dwo_file, objfile); |
348e048f | 13515 | |
3019eac3 DE |
13516 | return 1; |
13517 | } | |
348e048f | 13518 | |
3019eac3 | 13519 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 13520 | |
3019eac3 DE |
13521 | static void |
13522 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
13523 | { | |
13524 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 13525 | } |
3019eac3 DE |
13526 | \f |
13527 | /* Read in various DIEs. */ | |
348e048f | 13528 | |
d389af10 | 13529 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
13530 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
13531 | already referenced by DW_AT_abstract_origin from the children of the | |
13532 | current DIE. */ | |
d389af10 JK |
13533 | |
13534 | static void | |
13535 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
13536 | { | |
13537 | struct die_info *child_die; | |
791afaa2 | 13538 | sect_offset *offsetp; |
d389af10 JK |
13539 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
13540 | struct die_info *origin_die; | |
13541 | /* Iterator of the ORIGIN_DIE children. */ | |
13542 | struct die_info *origin_child_die; | |
d389af10 | 13543 | struct attribute *attr; |
cd02d79d PA |
13544 | struct dwarf2_cu *origin_cu; |
13545 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
13546 | |
13547 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13548 | if (!attr) | |
13549 | return; | |
13550 | ||
cd02d79d PA |
13551 | /* Note that following die references may follow to a die in a |
13552 | different cu. */ | |
13553 | ||
13554 | origin_cu = cu; | |
13555 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
13556 | ||
13557 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
13558 | symbols in. */ | |
13559 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
13560 | origin_cu->list_in_scope = cu->list_in_scope; | |
13561 | ||
edb3359d DJ |
13562 | if (die->tag != origin_die->tag |
13563 | && !(die->tag == DW_TAG_inlined_subroutine | |
13564 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
13565 | complaint (&symfile_complaints, |
13566 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
13567 | to_underlying (die->sect_off), |
13568 | to_underlying (origin_die->sect_off)); | |
d389af10 | 13569 | |
791afaa2 | 13570 | std::vector<sect_offset> offsets; |
d389af10 | 13571 | |
3ea89b92 PMR |
13572 | for (child_die = die->child; |
13573 | child_die && child_die->tag; | |
13574 | child_die = sibling_die (child_die)) | |
13575 | { | |
13576 | struct die_info *child_origin_die; | |
13577 | struct dwarf2_cu *child_origin_cu; | |
13578 | ||
13579 | /* We are trying to process concrete instance entries: | |
216f72a1 | 13580 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
13581 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
13582 | present in the abstract instance but not referenced in the concrete | |
13583 | one. */ | |
216f72a1 JK |
13584 | if (child_die->tag == DW_TAG_call_site |
13585 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
13586 | continue; |
13587 | ||
c38f313d DJ |
13588 | /* For each CHILD_DIE, find the corresponding child of |
13589 | ORIGIN_DIE. If there is more than one layer of | |
13590 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
13591 | but GCC versions at least through 4.4 generate this (GCC PR | |
13592 | 40573). */ | |
3ea89b92 PMR |
13593 | child_origin_die = child_die; |
13594 | child_origin_cu = cu; | |
c38f313d DJ |
13595 | while (1) |
13596 | { | |
cd02d79d PA |
13597 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
13598 | child_origin_cu); | |
c38f313d DJ |
13599 | if (attr == NULL) |
13600 | break; | |
cd02d79d PA |
13601 | child_origin_die = follow_die_ref (child_origin_die, attr, |
13602 | &child_origin_cu); | |
c38f313d DJ |
13603 | } |
13604 | ||
d389af10 JK |
13605 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
13606 | counterpart may exist. */ | |
c38f313d | 13607 | if (child_origin_die != child_die) |
d389af10 | 13608 | { |
edb3359d DJ |
13609 | if (child_die->tag != child_origin_die->tag |
13610 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
13611 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
13612 | complaint (&symfile_complaints, |
13613 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
13614 | "different tags"), |
13615 | to_underlying (child_die->sect_off), | |
13616 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
13617 | if (child_origin_die->parent != origin_die) |
13618 | complaint (&symfile_complaints, | |
13619 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
13620 | "different parents"), |
13621 | to_underlying (child_die->sect_off), | |
13622 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 13623 | else |
791afaa2 | 13624 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 13625 | } |
d389af10 | 13626 | } |
791afaa2 TT |
13627 | std::sort (offsets.begin (), offsets.end ()); |
13628 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
13629 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 13630 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
13631 | complaint (&symfile_complaints, |
13632 | _("Multiple children of DIE 0x%x refer " | |
13633 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 13634 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 | 13635 | |
791afaa2 | 13636 | offsetp = offsets.data (); |
d389af10 JK |
13637 | origin_child_die = origin_die->child; |
13638 | while (origin_child_die && origin_child_die->tag) | |
13639 | { | |
13640 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 13641 | while (offsetp < offsets_end |
9c541725 | 13642 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 13643 | offsetp++; |
b64f50a1 | 13644 | if (offsetp >= offsets_end |
9c541725 | 13645 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 13646 | { |
adde2bff DE |
13647 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
13648 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
13649 | This can happen with mutually referenced abstract_origins. | |
13650 | PR 16581. */ | |
13651 | if (!origin_child_die->in_process) | |
13652 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
13653 | } |
13654 | origin_child_die = sibling_die (origin_child_die); | |
13655 | } | |
cd02d79d | 13656 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
13657 | } |
13658 | ||
c906108c | 13659 | static void |
e7c27a73 | 13660 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13661 | { |
e7c27a73 | 13662 | struct objfile *objfile = cu->objfile; |
3e29f34a | 13663 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 13664 | struct context_stack *newobj; |
c906108c SS |
13665 | CORE_ADDR lowpc; |
13666 | CORE_ADDR highpc; | |
13667 | struct die_info *child_die; | |
edb3359d | 13668 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 13669 | const char *name; |
e142c38c | 13670 | CORE_ADDR baseaddr; |
801e3a5b | 13671 | struct block *block; |
edb3359d | 13672 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 13673 | std::vector<struct symbol *> template_args; |
34eaf542 | 13674 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
13675 | |
13676 | if (inlined_func) | |
13677 | { | |
13678 | /* If we do not have call site information, we can't show the | |
13679 | caller of this inlined function. That's too confusing, so | |
13680 | only use the scope for local variables. */ | |
13681 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
13682 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
13683 | if (call_line == NULL || call_file == NULL) | |
13684 | { | |
13685 | read_lexical_block_scope (die, cu); | |
13686 | return; | |
13687 | } | |
13688 | } | |
c906108c | 13689 | |
e142c38c DJ |
13690 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
13691 | ||
94af9270 | 13692 | name = dwarf2_name (die, cu); |
c906108c | 13693 | |
e8d05480 JB |
13694 | /* Ignore functions with missing or empty names. These are actually |
13695 | illegal according to the DWARF standard. */ | |
13696 | if (name == NULL) | |
13697 | { | |
13698 | complaint (&symfile_complaints, | |
b64f50a1 | 13699 | _("missing name for subprogram DIE at %d"), |
9c541725 | 13700 | to_underlying (die->sect_off)); |
e8d05480 JB |
13701 | return; |
13702 | } | |
13703 | ||
13704 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 13705 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 13706 | <= PC_BOUNDS_INVALID) |
e8d05480 | 13707 | { |
ae4d0c03 PM |
13708 | attr = dwarf2_attr (die, DW_AT_external, cu); |
13709 | if (!attr || !DW_UNSND (attr)) | |
13710 | complaint (&symfile_complaints, | |
3e43a32a MS |
13711 | _("cannot get low and high bounds " |
13712 | "for subprogram DIE at %d"), | |
9c541725 | 13713 | to_underlying (die->sect_off)); |
e8d05480 JB |
13714 | return; |
13715 | } | |
c906108c | 13716 | |
3e29f34a MR |
13717 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13718 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13719 | |
34eaf542 TT |
13720 | /* If we have any template arguments, then we must allocate a |
13721 | different sort of symbol. */ | |
13722 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
13723 | { | |
13724 | if (child_die->tag == DW_TAG_template_type_param | |
13725 | || child_die->tag == DW_TAG_template_value_param) | |
13726 | { | |
e623cf5d | 13727 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 13728 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
13729 | break; |
13730 | } | |
13731 | } | |
13732 | ||
fe978cb0 PA |
13733 | newobj = push_context (0, lowpc); |
13734 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 13735 | (struct symbol *) templ_func); |
4c2df51b | 13736 | |
4cecd739 DJ |
13737 | /* If there is a location expression for DW_AT_frame_base, record |
13738 | it. */ | |
e142c38c | 13739 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 13740 | if (attr) |
fe978cb0 | 13741 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13742 | |
63e43d3a PMR |
13743 | /* If there is a location for the static link, record it. */ |
13744 | newobj->static_link = NULL; | |
13745 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
13746 | if (attr) | |
13747 | { | |
224c3ddb SM |
13748 | newobj->static_link |
13749 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
13750 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
13751 | } | |
13752 | ||
e142c38c | 13753 | cu->list_in_scope = &local_symbols; |
c906108c | 13754 | |
639d11d3 | 13755 | if (die->child != NULL) |
c906108c | 13756 | { |
639d11d3 | 13757 | child_die = die->child; |
c906108c SS |
13758 | while (child_die && child_die->tag) |
13759 | { | |
34eaf542 TT |
13760 | if (child_die->tag == DW_TAG_template_type_param |
13761 | || child_die->tag == DW_TAG_template_value_param) | |
13762 | { | |
13763 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13764 | ||
f1078f66 | 13765 | if (arg != NULL) |
2f4732b0 | 13766 | template_args.push_back (arg); |
34eaf542 TT |
13767 | } |
13768 | else | |
13769 | process_die (child_die, cu); | |
c906108c SS |
13770 | child_die = sibling_die (child_die); |
13771 | } | |
13772 | } | |
13773 | ||
d389af10 JK |
13774 | inherit_abstract_dies (die, cu); |
13775 | ||
4a811a97 UW |
13776 | /* If we have a DW_AT_specification, we might need to import using |
13777 | directives from the context of the specification DIE. See the | |
13778 | comment in determine_prefix. */ | |
13779 | if (cu->language == language_cplus | |
13780 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13781 | { | |
13782 | struct dwarf2_cu *spec_cu = cu; | |
13783 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13784 | ||
13785 | while (spec_die) | |
13786 | { | |
13787 | child_die = spec_die->child; | |
13788 | while (child_die && child_die->tag) | |
13789 | { | |
13790 | if (child_die->tag == DW_TAG_imported_module) | |
13791 | process_die (child_die, spec_cu); | |
13792 | child_die = sibling_die (child_die); | |
13793 | } | |
13794 | ||
13795 | /* In some cases, GCC generates specification DIEs that | |
13796 | themselves contain DW_AT_specification attributes. */ | |
13797 | spec_die = die_specification (spec_die, &spec_cu); | |
13798 | } | |
13799 | } | |
13800 | ||
fe978cb0 | 13801 | newobj = pop_context (); |
c906108c | 13802 | /* Make a block for the local symbols within. */ |
fe978cb0 | 13803 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 13804 | newobj->static_link, lowpc, highpc); |
801e3a5b | 13805 | |
df8a16a1 | 13806 | /* For C++, set the block's scope. */ |
45280282 IB |
13807 | if ((cu->language == language_cplus |
13808 | || cu->language == language_fortran | |
c44af4eb TT |
13809 | || cu->language == language_d |
13810 | || cu->language == language_rust) | |
4d4ec4e5 | 13811 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13812 | block_set_scope (block, determine_prefix (die, cu), |
13813 | &objfile->objfile_obstack); | |
df8a16a1 | 13814 | |
801e3a5b JB |
13815 | /* If we have address ranges, record them. */ |
13816 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13817 | |
fe978cb0 | 13818 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 13819 | |
34eaf542 | 13820 | /* Attach template arguments to function. */ |
2f4732b0 | 13821 | if (!template_args.empty ()) |
34eaf542 TT |
13822 | { |
13823 | gdb_assert (templ_func != NULL); | |
13824 | ||
2f4732b0 | 13825 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13826 | templ_func->template_arguments |
8d749320 SM |
13827 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13828 | templ_func->n_template_arguments); | |
34eaf542 | 13829 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13830 | template_args.data (), |
34eaf542 | 13831 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
34eaf542 TT |
13832 | } |
13833 | ||
208d8187 JB |
13834 | /* In C++, we can have functions nested inside functions (e.g., when |
13835 | a function declares a class that has methods). This means that | |
13836 | when we finish processing a function scope, we may need to go | |
13837 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 13838 | local_symbols = newobj->locals; |
22cee43f | 13839 | local_using_directives = newobj->local_using_directives; |
208d8187 | 13840 | |
921e78cf JB |
13841 | /* If we've finished processing a top-level function, subsequent |
13842 | symbols go in the file symbol list. */ | |
13843 | if (outermost_context_p ()) | |
e142c38c | 13844 | cu->list_in_scope = &file_symbols; |
c906108c SS |
13845 | } |
13846 | ||
13847 | /* Process all the DIES contained within a lexical block scope. Start | |
13848 | a new scope, process the dies, and then close the scope. */ | |
13849 | ||
13850 | static void | |
e7c27a73 | 13851 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13852 | { |
e7c27a73 | 13853 | struct objfile *objfile = cu->objfile; |
3e29f34a | 13854 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 13855 | struct context_stack *newobj; |
c906108c SS |
13856 | CORE_ADDR lowpc, highpc; |
13857 | struct die_info *child_die; | |
e142c38c DJ |
13858 | CORE_ADDR baseaddr; |
13859 | ||
13860 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
13861 | |
13862 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13863 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13864 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13865 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13866 | describe ranges. */ |
e385593e JK |
13867 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13868 | { | |
13869 | case PC_BOUNDS_NOT_PRESENT: | |
13870 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13871 | there was no wrapping by that DW_TAG_lexical_block. | |
13872 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13873 | for (child_die = die->child; | |
13874 | child_die != NULL && child_die->tag; | |
13875 | child_die = sibling_die (child_die)) | |
13876 | process_die (child_die, cu); | |
13877 | return; | |
13878 | case PC_BOUNDS_INVALID: | |
13879 | return; | |
13880 | } | |
3e29f34a MR |
13881 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13882 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
13883 | |
13884 | push_context (0, lowpc); | |
639d11d3 | 13885 | if (die->child != NULL) |
c906108c | 13886 | { |
639d11d3 | 13887 | child_die = die->child; |
c906108c SS |
13888 | while (child_die && child_die->tag) |
13889 | { | |
e7c27a73 | 13890 | process_die (child_die, cu); |
c906108c SS |
13891 | child_die = sibling_die (child_die); |
13892 | } | |
13893 | } | |
3ea89b92 | 13894 | inherit_abstract_dies (die, cu); |
fe978cb0 | 13895 | newobj = pop_context (); |
c906108c | 13896 | |
22cee43f | 13897 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 13898 | { |
801e3a5b | 13899 | struct block *block |
63e43d3a | 13900 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 13901 | newobj->start_addr, highpc); |
801e3a5b JB |
13902 | |
13903 | /* Note that recording ranges after traversing children, as we | |
13904 | do here, means that recording a parent's ranges entails | |
13905 | walking across all its children's ranges as they appear in | |
13906 | the address map, which is quadratic behavior. | |
13907 | ||
13908 | It would be nicer to record the parent's ranges before | |
13909 | traversing its children, simply overriding whatever you find | |
13910 | there. But since we don't even decide whether to create a | |
13911 | block until after we've traversed its children, that's hard | |
13912 | to do. */ | |
13913 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13914 | } |
fe978cb0 | 13915 | local_symbols = newobj->locals; |
22cee43f | 13916 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
13917 | } |
13918 | ||
216f72a1 | 13919 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13920 | |
13921 | static void | |
13922 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13923 | { | |
13924 | struct objfile *objfile = cu->objfile; | |
13925 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13926 | CORE_ADDR pc, baseaddr; | |
13927 | struct attribute *attr; | |
13928 | struct call_site *call_site, call_site_local; | |
13929 | void **slot; | |
13930 | int nparams; | |
13931 | struct die_info *child_die; | |
13932 | ||
13933 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
13934 | ||
216f72a1 JK |
13935 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13936 | if (attr == NULL) | |
13937 | { | |
13938 | /* This was a pre-DWARF-5 GNU extension alias | |
13939 | for DW_AT_call_return_pc. */ | |
13940 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13941 | } | |
96408a79 SA |
13942 | if (!attr) |
13943 | { | |
13944 | complaint (&symfile_complaints, | |
216f72a1 | 13945 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 13946 | "DIE 0x%x [in module %s]"), |
9c541725 | 13947 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
13948 | return; |
13949 | } | |
31aa7e4e | 13950 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 13951 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13952 | |
13953 | if (cu->call_site_htab == NULL) | |
13954 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13955 | NULL, &objfile->objfile_obstack, | |
13956 | hashtab_obstack_allocate, NULL); | |
13957 | call_site_local.pc = pc; | |
13958 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13959 | if (*slot != NULL) | |
13960 | { | |
13961 | complaint (&symfile_complaints, | |
216f72a1 | 13962 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 13963 | "DIE 0x%x [in module %s]"), |
9c541725 | 13964 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 13965 | objfile_name (objfile)); |
96408a79 SA |
13966 | return; |
13967 | } | |
13968 | ||
13969 | /* Count parameters at the caller. */ | |
13970 | ||
13971 | nparams = 0; | |
13972 | for (child_die = die->child; child_die && child_die->tag; | |
13973 | child_die = sibling_die (child_die)) | |
13974 | { | |
216f72a1 JK |
13975 | if (child_die->tag != DW_TAG_call_site_parameter |
13976 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
13977 | { |
13978 | complaint (&symfile_complaints, | |
216f72a1 JK |
13979 | _("Tag %d is not DW_TAG_call_site_parameter in " |
13980 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 13981 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 13982 | objfile_name (objfile)); |
96408a79 SA |
13983 | continue; |
13984 | } | |
13985 | ||
13986 | nparams++; | |
13987 | } | |
13988 | ||
224c3ddb SM |
13989 | call_site |
13990 | = ((struct call_site *) | |
13991 | obstack_alloc (&objfile->objfile_obstack, | |
13992 | sizeof (*call_site) | |
13993 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13994 | *slot = call_site; |
13995 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13996 | call_site->pc = pc; | |
13997 | ||
216f72a1 JK |
13998 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13999 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
14000 | { |
14001 | struct die_info *func_die; | |
14002 | ||
14003 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
14004 | for (func_die = die->parent; | |
14005 | func_die && func_die->tag != DW_TAG_subprogram | |
14006 | && func_die->tag != DW_TAG_subroutine_type; | |
14007 | func_die = func_die->parent); | |
14008 | ||
216f72a1 JK |
14009 | /* DW_AT_call_all_calls is a superset |
14010 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 14011 | if (func_die |
216f72a1 | 14012 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 14013 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 14014 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
14015 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
14016 | { | |
14017 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
14018 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
14019 | both the initial caller containing the real return address PC and | |
14020 | the final callee containing the current PC of a chain of tail | |
14021 | calls do not need to have the tail call list complete. But any | |
14022 | function candidate for a virtual tail call frame searched via | |
14023 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
14024 | determined unambiguously. */ | |
14025 | } | |
14026 | else | |
14027 | { | |
14028 | struct type *func_type = NULL; | |
14029 | ||
14030 | if (func_die) | |
14031 | func_type = get_die_type (func_die, cu); | |
14032 | if (func_type != NULL) | |
14033 | { | |
14034 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
14035 | ||
14036 | /* Enlist this call site to the function. */ | |
14037 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
14038 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
14039 | } | |
14040 | else | |
14041 | complaint (&symfile_complaints, | |
216f72a1 | 14042 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 14043 | "DIE 0x%x [in module %s]"), |
9c541725 | 14044 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
14045 | } |
14046 | } | |
14047 | ||
216f72a1 JK |
14048 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
14049 | if (attr == NULL) | |
14050 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
14051 | if (attr == NULL) | |
14052 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 14053 | if (attr == NULL) |
216f72a1 JK |
14054 | { |
14055 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
14056 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
14057 | } | |
96408a79 SA |
14058 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
14059 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
14060 | /* Keep NULL DWARF_BLOCK. */; | |
14061 | else if (attr_form_is_block (attr)) | |
14062 | { | |
14063 | struct dwarf2_locexpr_baton *dlbaton; | |
14064 | ||
8d749320 | 14065 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
14066 | dlbaton->data = DW_BLOCK (attr)->data; |
14067 | dlbaton->size = DW_BLOCK (attr)->size; | |
14068 | dlbaton->per_cu = cu->per_cu; | |
14069 | ||
14070 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
14071 | } | |
7771576e | 14072 | else if (attr_form_is_ref (attr)) |
96408a79 | 14073 | { |
96408a79 SA |
14074 | struct dwarf2_cu *target_cu = cu; |
14075 | struct die_info *target_die; | |
14076 | ||
ac9ec31b | 14077 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
14078 | gdb_assert (target_cu->objfile == objfile); |
14079 | if (die_is_declaration (target_die, target_cu)) | |
14080 | { | |
7d45c7c3 | 14081 | const char *target_physname; |
9112db09 JK |
14082 | |
14083 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 14084 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 14085 | if (target_physname == NULL) |
9112db09 | 14086 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
14087 | if (target_physname == NULL) |
14088 | complaint (&symfile_complaints, | |
216f72a1 | 14089 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 14090 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 14091 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 14092 | else |
7d455152 | 14093 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
14094 | } |
14095 | else | |
14096 | { | |
14097 | CORE_ADDR lowpc; | |
14098 | ||
14099 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 14100 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 14101 | <= PC_BOUNDS_INVALID) |
96408a79 | 14102 | complaint (&symfile_complaints, |
216f72a1 | 14103 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 14104 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 14105 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 14106 | else |
3e29f34a MR |
14107 | { |
14108 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
14109 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
14110 | } | |
96408a79 SA |
14111 | } |
14112 | } | |
14113 | else | |
14114 | complaint (&symfile_complaints, | |
216f72a1 | 14115 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 14116 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 14117 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
14118 | |
14119 | call_site->per_cu = cu->per_cu; | |
14120 | ||
14121 | for (child_die = die->child; | |
14122 | child_die && child_die->tag; | |
14123 | child_die = sibling_die (child_die)) | |
14124 | { | |
96408a79 | 14125 | struct call_site_parameter *parameter; |
1788b2d3 | 14126 | struct attribute *loc, *origin; |
96408a79 | 14127 | |
216f72a1 JK |
14128 | if (child_die->tag != DW_TAG_call_site_parameter |
14129 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
14130 | { |
14131 | /* Already printed the complaint above. */ | |
14132 | continue; | |
14133 | } | |
14134 | ||
14135 | gdb_assert (call_site->parameter_count < nparams); | |
14136 | parameter = &call_site->parameter[call_site->parameter_count]; | |
14137 | ||
1788b2d3 JK |
14138 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
14139 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 14140 | register is contained in DW_AT_call_value. */ |
96408a79 | 14141 | |
24c5c679 | 14142 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
14143 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
14144 | if (origin == NULL) | |
14145 | { | |
14146 | /* This was a pre-DWARF-5 GNU extension alias | |
14147 | for DW_AT_call_parameter. */ | |
14148 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
14149 | } | |
7771576e | 14150 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 14151 | { |
1788b2d3 | 14152 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
14153 | |
14154 | sect_offset sect_off | |
14155 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
14156 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
14157 | { |
14158 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
14159 | binding can be done only inside one CU. Such referenced DIE | |
14160 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
14161 | complaint (&symfile_complaints, | |
216f72a1 JK |
14162 | _("DW_AT_call_parameter offset is not in CU for " |
14163 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
14164 | to_underlying (child_die->sect_off), |
14165 | objfile_name (objfile)); | |
d76b7dbc JK |
14166 | continue; |
14167 | } | |
9c541725 PA |
14168 | parameter->u.param_cu_off |
14169 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
14170 | } |
14171 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
14172 | { |
14173 | complaint (&symfile_complaints, | |
14174 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 14175 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 14176 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
14177 | continue; |
14178 | } | |
24c5c679 | 14179 | else |
96408a79 | 14180 | { |
24c5c679 JK |
14181 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
14182 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
14183 | if (parameter->u.dwarf_reg != -1) | |
14184 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
14185 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
14186 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
14187 | ¶meter->u.fb_offset)) | |
14188 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
14189 | else | |
14190 | { | |
14191 | complaint (&symfile_complaints, | |
14192 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
14193 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 14194 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 14195 | "[in module %s]"), |
9c541725 PA |
14196 | to_underlying (child_die->sect_off), |
14197 | objfile_name (objfile)); | |
24c5c679 JK |
14198 | continue; |
14199 | } | |
96408a79 SA |
14200 | } |
14201 | ||
216f72a1 JK |
14202 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
14203 | if (attr == NULL) | |
14204 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
14205 | if (!attr_form_is_block (attr)) |
14206 | { | |
14207 | complaint (&symfile_complaints, | |
216f72a1 JK |
14208 | _("No DW_FORM_block* DW_AT_call_value for " |
14209 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
14210 | to_underlying (child_die->sect_off), |
14211 | objfile_name (objfile)); | |
96408a79 SA |
14212 | continue; |
14213 | } | |
14214 | parameter->value = DW_BLOCK (attr)->data; | |
14215 | parameter->value_size = DW_BLOCK (attr)->size; | |
14216 | ||
14217 | /* Parameters are not pre-cleared by memset above. */ | |
14218 | parameter->data_value = NULL; | |
14219 | parameter->data_value_size = 0; | |
14220 | call_site->parameter_count++; | |
14221 | ||
216f72a1 JK |
14222 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
14223 | if (attr == NULL) | |
14224 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
14225 | if (attr) |
14226 | { | |
14227 | if (!attr_form_is_block (attr)) | |
14228 | complaint (&symfile_complaints, | |
216f72a1 JK |
14229 | _("No DW_FORM_block* DW_AT_call_data_value for " |
14230 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
14231 | to_underlying (child_die->sect_off), |
14232 | objfile_name (objfile)); | |
96408a79 SA |
14233 | else |
14234 | { | |
14235 | parameter->data_value = DW_BLOCK (attr)->data; | |
14236 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
14237 | } | |
14238 | } | |
14239 | } | |
14240 | } | |
14241 | ||
71a3c369 TT |
14242 | /* Helper function for read_variable. If DIE represents a virtual |
14243 | table, then return the type of the concrete object that is | |
14244 | associated with the virtual table. Otherwise, return NULL. */ | |
14245 | ||
14246 | static struct type * | |
14247 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
14248 | { | |
14249 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
14250 | if (attr == NULL) | |
14251 | return NULL; | |
14252 | ||
14253 | /* Find the type DIE. */ | |
14254 | struct die_info *type_die = NULL; | |
14255 | struct dwarf2_cu *type_cu = cu; | |
14256 | ||
14257 | if (attr_form_is_ref (attr)) | |
14258 | type_die = follow_die_ref (die, attr, &type_cu); | |
14259 | if (type_die == NULL) | |
14260 | return NULL; | |
14261 | ||
14262 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
14263 | return NULL; | |
14264 | return die_containing_type (type_die, type_cu); | |
14265 | } | |
14266 | ||
14267 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
14268 | ||
14269 | static void | |
14270 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
14271 | { | |
14272 | struct rust_vtable_symbol *storage = NULL; | |
14273 | ||
14274 | if (cu->language == language_rust) | |
14275 | { | |
14276 | struct type *containing_type = rust_containing_type (die, cu); | |
14277 | ||
14278 | if (containing_type != NULL) | |
14279 | { | |
14280 | struct objfile *objfile = cu->objfile; | |
14281 | ||
14282 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
14283 | struct rust_vtable_symbol); | |
14284 | initialize_objfile_symbol (storage); | |
14285 | storage->concrete_type = containing_type; | |
cf724bc9 | 14286 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
14287 | } |
14288 | } | |
14289 | ||
14290 | new_symbol_full (die, NULL, cu, storage); | |
14291 | } | |
14292 | ||
43988095 JK |
14293 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
14294 | reading .debug_rnglists. | |
14295 | Callback's type should be: | |
14296 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14297 | Return true if the attributes are present and valid, otherwise, | |
14298 | return false. */ | |
14299 | ||
14300 | template <typename Callback> | |
14301 | static bool | |
14302 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
14303 | Callback &&callback) | |
14304 | { | |
14305 | struct objfile *objfile = cu->objfile; | |
43988095 | 14306 | bfd *obfd = objfile->obfd; |
43988095 JK |
14307 | /* Base address selection entry. */ |
14308 | CORE_ADDR base; | |
14309 | int found_base; | |
43988095 | 14310 | const gdb_byte *buffer; |
43988095 JK |
14311 | CORE_ADDR baseaddr; |
14312 | bool overflow = false; | |
14313 | ||
14314 | found_base = cu->base_known; | |
14315 | base = cu->base_address; | |
14316 | ||
14317 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
14318 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
14319 | { | |
14320 | complaint (&symfile_complaints, | |
14321 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
14322 | offset); | |
14323 | return false; | |
14324 | } | |
14325 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
14326 | ||
14327 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
14328 | ||
14329 | while (1) | |
14330 | { | |
7814882a JK |
14331 | /* Initialize it due to a false compiler warning. */ |
14332 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
14333 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
14334 | + dwarf2_per_objfile->rnglists.size); | |
14335 | unsigned int bytes_read; | |
14336 | ||
14337 | if (buffer == buf_end) | |
14338 | { | |
14339 | overflow = true; | |
14340 | break; | |
14341 | } | |
14342 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
14343 | switch (rlet) | |
14344 | { | |
14345 | case DW_RLE_end_of_list: | |
14346 | break; | |
14347 | case DW_RLE_base_address: | |
14348 | if (buffer + cu->header.addr_size > buf_end) | |
14349 | { | |
14350 | overflow = true; | |
14351 | break; | |
14352 | } | |
14353 | base = read_address (obfd, buffer, cu, &bytes_read); | |
14354 | found_base = 1; | |
14355 | buffer += bytes_read; | |
14356 | break; | |
14357 | case DW_RLE_start_length: | |
14358 | if (buffer + cu->header.addr_size > buf_end) | |
14359 | { | |
14360 | overflow = true; | |
14361 | break; | |
14362 | } | |
14363 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14364 | buffer += bytes_read; | |
14365 | range_end = (range_beginning | |
14366 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
14367 | buffer += bytes_read; | |
14368 | if (buffer > buf_end) | |
14369 | { | |
14370 | overflow = true; | |
14371 | break; | |
14372 | } | |
14373 | break; | |
14374 | case DW_RLE_offset_pair: | |
14375 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14376 | buffer += bytes_read; | |
14377 | if (buffer > buf_end) | |
14378 | { | |
14379 | overflow = true; | |
14380 | break; | |
14381 | } | |
14382 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14383 | buffer += bytes_read; | |
14384 | if (buffer > buf_end) | |
14385 | { | |
14386 | overflow = true; | |
14387 | break; | |
14388 | } | |
14389 | break; | |
14390 | case DW_RLE_start_end: | |
14391 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
14392 | { | |
14393 | overflow = true; | |
14394 | break; | |
14395 | } | |
14396 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14397 | buffer += bytes_read; | |
14398 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
14399 | buffer += bytes_read; | |
14400 | break; | |
14401 | default: | |
14402 | complaint (&symfile_complaints, | |
14403 | _("Invalid .debug_rnglists data (no base address)")); | |
14404 | return false; | |
14405 | } | |
14406 | if (rlet == DW_RLE_end_of_list || overflow) | |
14407 | break; | |
14408 | if (rlet == DW_RLE_base_address) | |
14409 | continue; | |
14410 | ||
14411 | if (!found_base) | |
14412 | { | |
14413 | /* We have no valid base address for the ranges | |
14414 | data. */ | |
14415 | complaint (&symfile_complaints, | |
14416 | _("Invalid .debug_rnglists data (no base address)")); | |
14417 | return false; | |
14418 | } | |
14419 | ||
14420 | if (range_beginning > range_end) | |
14421 | { | |
14422 | /* Inverted range entries are invalid. */ | |
14423 | complaint (&symfile_complaints, | |
14424 | _("Invalid .debug_rnglists data (inverted range)")); | |
14425 | return false; | |
14426 | } | |
14427 | ||
14428 | /* Empty range entries have no effect. */ | |
14429 | if (range_beginning == range_end) | |
14430 | continue; | |
14431 | ||
14432 | range_beginning += base; | |
14433 | range_end += base; | |
14434 | ||
14435 | /* A not-uncommon case of bad debug info. | |
14436 | Don't pollute the addrmap with bad data. */ | |
14437 | if (range_beginning + baseaddr == 0 | |
14438 | && !dwarf2_per_objfile->has_section_at_zero) | |
14439 | { | |
14440 | complaint (&symfile_complaints, | |
14441 | _(".debug_rnglists entry has start address of zero" | |
14442 | " [in module %s]"), objfile_name (objfile)); | |
14443 | continue; | |
14444 | } | |
14445 | ||
14446 | callback (range_beginning, range_end); | |
14447 | } | |
14448 | ||
14449 | if (overflow) | |
14450 | { | |
14451 | complaint (&symfile_complaints, | |
14452 | _("Offset %d is not terminated " | |
14453 | "for DW_AT_ranges attribute"), | |
14454 | offset); | |
14455 | return false; | |
14456 | } | |
14457 | ||
14458 | return true; | |
14459 | } | |
14460 | ||
14461 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
14462 | Callback's type should be: | |
14463 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 14464 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 14465 | |
43988095 | 14466 | template <typename Callback> |
43039443 | 14467 | static int |
5f46c5a5 | 14468 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 14469 | Callback &&callback) |
43039443 JK |
14470 | { |
14471 | struct objfile *objfile = cu->objfile; | |
14472 | struct comp_unit_head *cu_header = &cu->header; | |
14473 | bfd *obfd = objfile->obfd; | |
14474 | unsigned int addr_size = cu_header->addr_size; | |
14475 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
14476 | /* Base address selection entry. */ | |
14477 | CORE_ADDR base; | |
14478 | int found_base; | |
14479 | unsigned int dummy; | |
d521ce57 | 14480 | const gdb_byte *buffer; |
ff013f42 | 14481 | CORE_ADDR baseaddr; |
43039443 | 14482 | |
43988095 JK |
14483 | if (cu_header->version >= 5) |
14484 | return dwarf2_rnglists_process (offset, cu, callback); | |
14485 | ||
d00adf39 DE |
14486 | found_base = cu->base_known; |
14487 | base = cu->base_address; | |
43039443 | 14488 | |
be391dca | 14489 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 14490 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
14491 | { |
14492 | complaint (&symfile_complaints, | |
14493 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
14494 | offset); | |
14495 | return 0; | |
14496 | } | |
dce234bc | 14497 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 14498 | |
e7030f15 | 14499 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 14500 | |
43039443 JK |
14501 | while (1) |
14502 | { | |
14503 | CORE_ADDR range_beginning, range_end; | |
14504 | ||
14505 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
14506 | buffer += addr_size; | |
14507 | range_end = read_address (obfd, buffer, cu, &dummy); | |
14508 | buffer += addr_size; | |
14509 | offset += 2 * addr_size; | |
14510 | ||
14511 | /* An end of list marker is a pair of zero addresses. */ | |
14512 | if (range_beginning == 0 && range_end == 0) | |
14513 | /* Found the end of list entry. */ | |
14514 | break; | |
14515 | ||
14516 | /* Each base address selection entry is a pair of 2 values. | |
14517 | The first is the largest possible address, the second is | |
14518 | the base address. Check for a base address here. */ | |
14519 | if ((range_beginning & mask) == mask) | |
14520 | { | |
28d2bfb9 AB |
14521 | /* If we found the largest possible address, then we already |
14522 | have the base address in range_end. */ | |
14523 | base = range_end; | |
43039443 JK |
14524 | found_base = 1; |
14525 | continue; | |
14526 | } | |
14527 | ||
14528 | if (!found_base) | |
14529 | { | |
14530 | /* We have no valid base address for the ranges | |
14531 | data. */ | |
14532 | complaint (&symfile_complaints, | |
14533 | _("Invalid .debug_ranges data (no base address)")); | |
14534 | return 0; | |
14535 | } | |
14536 | ||
9277c30c UW |
14537 | if (range_beginning > range_end) |
14538 | { | |
14539 | /* Inverted range entries are invalid. */ | |
14540 | complaint (&symfile_complaints, | |
14541 | _("Invalid .debug_ranges data (inverted range)")); | |
14542 | return 0; | |
14543 | } | |
14544 | ||
14545 | /* Empty range entries have no effect. */ | |
14546 | if (range_beginning == range_end) | |
14547 | continue; | |
14548 | ||
43039443 JK |
14549 | range_beginning += base; |
14550 | range_end += base; | |
14551 | ||
01093045 DE |
14552 | /* A not-uncommon case of bad debug info. |
14553 | Don't pollute the addrmap with bad data. */ | |
14554 | if (range_beginning + baseaddr == 0 | |
14555 | && !dwarf2_per_objfile->has_section_at_zero) | |
14556 | { | |
14557 | complaint (&symfile_complaints, | |
14558 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 14559 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
14560 | continue; |
14561 | } | |
14562 | ||
5f46c5a5 JK |
14563 | callback (range_beginning, range_end); |
14564 | } | |
14565 | ||
14566 | return 1; | |
14567 | } | |
14568 | ||
14569 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
14570 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
14571 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
14572 | ||
14573 | static int | |
14574 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
14575 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
14576 | struct partial_symtab *ranges_pst) | |
14577 | { | |
14578 | struct objfile *objfile = cu->objfile; | |
14579 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
14580 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
14581 | SECT_OFF_TEXT (objfile)); | |
14582 | int low_set = 0; | |
14583 | CORE_ADDR low = 0; | |
14584 | CORE_ADDR high = 0; | |
14585 | int retval; | |
14586 | ||
14587 | retval = dwarf2_ranges_process (offset, cu, | |
14588 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14589 | { | |
9277c30c | 14590 | if (ranges_pst != NULL) |
3e29f34a MR |
14591 | { |
14592 | CORE_ADDR lowpc; | |
14593 | CORE_ADDR highpc; | |
14594 | ||
14595 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
14596 | range_beginning + baseaddr); | |
14597 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
14598 | range_end + baseaddr); | |
14599 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
14600 | ranges_pst); | |
14601 | } | |
ff013f42 | 14602 | |
43039443 JK |
14603 | /* FIXME: This is recording everything as a low-high |
14604 | segment of consecutive addresses. We should have a | |
14605 | data structure for discontiguous block ranges | |
14606 | instead. */ | |
14607 | if (! low_set) | |
14608 | { | |
14609 | low = range_beginning; | |
14610 | high = range_end; | |
14611 | low_set = 1; | |
14612 | } | |
14613 | else | |
14614 | { | |
14615 | if (range_beginning < low) | |
14616 | low = range_beginning; | |
14617 | if (range_end > high) | |
14618 | high = range_end; | |
14619 | } | |
5f46c5a5 JK |
14620 | }); |
14621 | if (!retval) | |
14622 | return 0; | |
43039443 JK |
14623 | |
14624 | if (! low_set) | |
14625 | /* If the first entry is an end-of-list marker, the range | |
14626 | describes an empty scope, i.e. no instructions. */ | |
14627 | return 0; | |
14628 | ||
14629 | if (low_return) | |
14630 | *low_return = low; | |
14631 | if (high_return) | |
14632 | *high_return = high; | |
14633 | return 1; | |
14634 | } | |
14635 | ||
3a2b436a JK |
14636 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
14637 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 14638 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 14639 | |
3a2b436a | 14640 | static enum pc_bounds_kind |
af34e669 | 14641 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
14642 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
14643 | struct partial_symtab *pst) | |
c906108c SS |
14644 | { |
14645 | struct attribute *attr; | |
91da1414 | 14646 | struct attribute *attr_high; |
af34e669 DJ |
14647 | CORE_ADDR low = 0; |
14648 | CORE_ADDR high = 0; | |
e385593e | 14649 | enum pc_bounds_kind ret; |
c906108c | 14650 | |
91da1414 MW |
14651 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14652 | if (attr_high) | |
af34e669 | 14653 | { |
e142c38c | 14654 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 14655 | if (attr) |
91da1414 | 14656 | { |
31aa7e4e JB |
14657 | low = attr_value_as_address (attr); |
14658 | high = attr_value_as_address (attr_high); | |
14659 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14660 | high += low; | |
91da1414 | 14661 | } |
af34e669 DJ |
14662 | else |
14663 | /* Found high w/o low attribute. */ | |
e385593e | 14664 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
14665 | |
14666 | /* Found consecutive range of addresses. */ | |
3a2b436a | 14667 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 14668 | } |
c906108c | 14669 | else |
af34e669 | 14670 | { |
e142c38c | 14671 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
14672 | if (attr != NULL) |
14673 | { | |
ab435259 DE |
14674 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14675 | We take advantage of the fact that DW_AT_ranges does not appear | |
14676 | in DW_TAG_compile_unit of DWO files. */ | |
14677 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
14678 | unsigned int ranges_offset = (DW_UNSND (attr) | |
14679 | + (need_ranges_base | |
14680 | ? cu->ranges_base | |
14681 | : 0)); | |
2e3cf129 | 14682 | |
af34e669 | 14683 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 14684 | .debug_ranges section. */ |
2e3cf129 | 14685 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 14686 | return PC_BOUNDS_INVALID; |
43039443 | 14687 | /* Found discontinuous range of addresses. */ |
3a2b436a | 14688 | ret = PC_BOUNDS_RANGES; |
af34e669 | 14689 | } |
e385593e JK |
14690 | else |
14691 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 14692 | } |
c906108c | 14693 | |
9373cf26 JK |
14694 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
14695 | if (high <= low) | |
e385593e | 14696 | return PC_BOUNDS_INVALID; |
c906108c SS |
14697 | |
14698 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14699 | eliminate duplicate copies of functions and vtables and such. | |
14700 | The linker will arbitrarily choose one and discard the others. | |
14701 | The AT_*_pc values for such functions refer to local labels in | |
14702 | these sections. If the section from that file was discarded, the | |
14703 | labels are not in the output, so the relocs get a value of 0. | |
14704 | If this is a discarded function, mark the pc bounds as invalid, | |
14705 | so that GDB will ignore it. */ | |
72dca2f5 | 14706 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 14707 | return PC_BOUNDS_INVALID; |
c906108c SS |
14708 | |
14709 | *lowpc = low; | |
96408a79 SA |
14710 | if (highpc) |
14711 | *highpc = high; | |
af34e669 | 14712 | return ret; |
c906108c SS |
14713 | } |
14714 | ||
b084d499 JB |
14715 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
14716 | its low and high PC addresses. Do nothing if these addresses could not | |
14717 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
14718 | and HIGHPC to the high address if greater than HIGHPC. */ | |
14719 | ||
14720 | static void | |
14721 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
14722 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14723 | struct dwarf2_cu *cu) | |
14724 | { | |
14725 | CORE_ADDR low, high; | |
14726 | struct die_info *child = die->child; | |
14727 | ||
e385593e | 14728 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14729 | { |
325fac50 PA |
14730 | *lowpc = std::min (*lowpc, low); |
14731 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14732 | } |
14733 | ||
14734 | /* If the language does not allow nested subprograms (either inside | |
14735 | subprograms or lexical blocks), we're done. */ | |
14736 | if (cu->language != language_ada) | |
14737 | return; | |
6e70227d | 14738 | |
b084d499 JB |
14739 | /* Check all the children of the given DIE. If it contains nested |
14740 | subprograms, then check their pc bounds. Likewise, we need to | |
14741 | check lexical blocks as well, as they may also contain subprogram | |
14742 | definitions. */ | |
14743 | while (child && child->tag) | |
14744 | { | |
14745 | if (child->tag == DW_TAG_subprogram | |
14746 | || child->tag == DW_TAG_lexical_block) | |
14747 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
14748 | child = sibling_die (child); | |
14749 | } | |
14750 | } | |
14751 | ||
fae299cd DC |
14752 | /* Get the low and high pc's represented by the scope DIE, and store |
14753 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14754 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14755 | ||
14756 | static void | |
14757 | get_scope_pc_bounds (struct die_info *die, | |
14758 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14759 | struct dwarf2_cu *cu) | |
14760 | { | |
14761 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14762 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14763 | CORE_ADDR current_low, current_high; | |
14764 | ||
3a2b436a | 14765 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14766 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14767 | { |
14768 | best_low = current_low; | |
14769 | best_high = current_high; | |
14770 | } | |
14771 | else | |
14772 | { | |
14773 | struct die_info *child = die->child; | |
14774 | ||
14775 | while (child && child->tag) | |
14776 | { | |
14777 | switch (child->tag) { | |
14778 | case DW_TAG_subprogram: | |
b084d499 | 14779 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14780 | break; |
14781 | case DW_TAG_namespace: | |
f55ee35c | 14782 | case DW_TAG_module: |
fae299cd DC |
14783 | /* FIXME: carlton/2004-01-16: Should we do this for |
14784 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14785 | that current GCC's always emit the DIEs corresponding | |
14786 | to definitions of methods of classes as children of a | |
14787 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14788 | the DIEs giving the declarations, which could be | |
14789 | anywhere). But I don't see any reason why the | |
14790 | standards says that they have to be there. */ | |
14791 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14792 | ||
14793 | if (current_low != ((CORE_ADDR) -1)) | |
14794 | { | |
325fac50 PA |
14795 | best_low = std::min (best_low, current_low); |
14796 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14797 | } |
14798 | break; | |
14799 | default: | |
0963b4bd | 14800 | /* Ignore. */ |
fae299cd DC |
14801 | break; |
14802 | } | |
14803 | ||
14804 | child = sibling_die (child); | |
14805 | } | |
14806 | } | |
14807 | ||
14808 | *lowpc = best_low; | |
14809 | *highpc = best_high; | |
14810 | } | |
14811 | ||
801e3a5b JB |
14812 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14813 | in DIE. */ | |
380bca97 | 14814 | |
801e3a5b JB |
14815 | static void |
14816 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
14817 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
14818 | { | |
bb5ed363 | 14819 | struct objfile *objfile = cu->objfile; |
3e29f34a | 14820 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 14821 | struct attribute *attr; |
91da1414 | 14822 | struct attribute *attr_high; |
801e3a5b | 14823 | |
91da1414 MW |
14824 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14825 | if (attr_high) | |
801e3a5b | 14826 | { |
801e3a5b JB |
14827 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
14828 | if (attr) | |
14829 | { | |
31aa7e4e JB |
14830 | CORE_ADDR low = attr_value_as_address (attr); |
14831 | CORE_ADDR high = attr_value_as_address (attr_high); | |
14832 | ||
14833 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14834 | high += low; | |
9a619af0 | 14835 | |
3e29f34a MR |
14836 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14837 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
14838 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
14839 | } |
14840 | } | |
14841 | ||
14842 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
14843 | if (attr) | |
14844 | { | |
ab435259 DE |
14845 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14846 | We take advantage of the fact that DW_AT_ranges does not appear | |
14847 | in DW_TAG_compile_unit of DWO files. */ | |
14848 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14849 | |
14850 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14851 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14852 | unsigned long offset = (DW_UNSND (attr) |
14853 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 14854 | const gdb_byte *buffer; |
801e3a5b JB |
14855 | |
14856 | /* For some target architectures, but not others, the | |
14857 | read_address function sign-extends the addresses it returns. | |
14858 | To recognize base address selection entries, we need a | |
14859 | mask. */ | |
14860 | unsigned int addr_size = cu->header.addr_size; | |
14861 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
14862 | ||
14863 | /* The base address, to which the next pair is relative. Note | |
14864 | that this 'base' is a DWARF concept: most entries in a range | |
14865 | list are relative, to reduce the number of relocs against the | |
14866 | debugging information. This is separate from this function's | |
14867 | 'baseaddr' argument, which GDB uses to relocate debugging | |
14868 | information from a shared library based on the address at | |
14869 | which the library was loaded. */ | |
d00adf39 DE |
14870 | CORE_ADDR base = cu->base_address; |
14871 | int base_known = cu->base_known; | |
801e3a5b | 14872 | |
5f46c5a5 JK |
14873 | dwarf2_ranges_process (offset, cu, |
14874 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14875 | { | |
58fdfd2c JK |
14876 | start += baseaddr; |
14877 | end += baseaddr; | |
5f46c5a5 JK |
14878 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14879 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
14880 | record_block_range (block, start, end - 1); | |
14881 | }); | |
801e3a5b JB |
14882 | } |
14883 | } | |
14884 | ||
685b1105 JK |
14885 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14886 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14887 | |
685b1105 JK |
14888 | static void |
14889 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14890 | { |
38360086 | 14891 | int major, minor; |
60d5a603 JK |
14892 | |
14893 | if (cu->producer == NULL) | |
14894 | { | |
14895 | /* For unknown compilers expect their behavior is DWARF version | |
14896 | compliant. | |
14897 | ||
14898 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14899 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14900 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14901 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14902 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14903 | } |
b1ffba5a | 14904 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14905 | { |
38360086 MW |
14906 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14907 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14908 | } |
5230b05a WT |
14909 | else if (producer_is_icc (cu->producer, &major, &minor)) |
14910 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
14911 | else |
14912 | { | |
14913 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14914 | compliant. */ | |
60d5a603 JK |
14915 | } |
14916 | ||
ba919b58 | 14917 | cu->checked_producer = 1; |
685b1105 | 14918 | } |
ba919b58 | 14919 | |
685b1105 JK |
14920 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14921 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14922 | during 4.6.0 experimental. */ | |
14923 | ||
14924 | static int | |
14925 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
14926 | { | |
14927 | if (!cu->checked_producer) | |
14928 | check_producer (cu); | |
14929 | ||
14930 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14931 | } |
14932 | ||
14933 | /* Return the default accessibility type if it is not overriden by | |
14934 | DW_AT_accessibility. */ | |
14935 | ||
14936 | static enum dwarf_access_attribute | |
14937 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14938 | { | |
14939 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14940 | { | |
14941 | /* The default DWARF 2 accessibility for members is public, the default | |
14942 | accessibility for inheritance is private. */ | |
14943 | ||
14944 | if (die->tag != DW_TAG_inheritance) | |
14945 | return DW_ACCESS_public; | |
14946 | else | |
14947 | return DW_ACCESS_private; | |
14948 | } | |
14949 | else | |
14950 | { | |
14951 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14952 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14953 | depends on the container kind. */ | |
14954 | ||
14955 | if (die->parent->tag == DW_TAG_class_type) | |
14956 | return DW_ACCESS_private; | |
14957 | else | |
14958 | return DW_ACCESS_public; | |
14959 | } | |
14960 | } | |
14961 | ||
74ac6d43 TT |
14962 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14963 | offset. If the attribute was not found return 0, otherwise return | |
14964 | 1. If it was found but could not properly be handled, set *OFFSET | |
14965 | to 0. */ | |
14966 | ||
14967 | static int | |
14968 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14969 | LONGEST *offset) | |
14970 | { | |
14971 | struct attribute *attr; | |
14972 | ||
14973 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14974 | if (attr != NULL) | |
14975 | { | |
14976 | *offset = 0; | |
14977 | ||
14978 | /* Note that we do not check for a section offset first here. | |
14979 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14980 | so if we see it, we can assume that a constant form is really | |
14981 | a constant and not a section offset. */ | |
14982 | if (attr_form_is_constant (attr)) | |
14983 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
14984 | else if (attr_form_is_section_offset (attr)) | |
14985 | dwarf2_complex_location_expr_complaint (); | |
14986 | else if (attr_form_is_block (attr)) | |
14987 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
14988 | else | |
14989 | dwarf2_complex_location_expr_complaint (); | |
14990 | ||
14991 | return 1; | |
14992 | } | |
14993 | ||
14994 | return 0; | |
14995 | } | |
14996 | ||
c906108c SS |
14997 | /* Add an aggregate field to the field list. */ |
14998 | ||
14999 | static void | |
107d2387 | 15000 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15001 | struct dwarf2_cu *cu) |
6e70227d | 15002 | { |
e7c27a73 | 15003 | struct objfile *objfile = cu->objfile; |
5e2b427d | 15004 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15005 | struct nextfield *new_field; |
15006 | struct attribute *attr; | |
15007 | struct field *fp; | |
15d034d0 | 15008 | const char *fieldname = ""; |
c906108c SS |
15009 | |
15010 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 15011 | new_field = XNEW (struct nextfield); |
b8c9b27d | 15012 | make_cleanup (xfree, new_field); |
c906108c | 15013 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
15014 | |
15015 | if (die->tag == DW_TAG_inheritance) | |
15016 | { | |
15017 | new_field->next = fip->baseclasses; | |
15018 | fip->baseclasses = new_field; | |
15019 | } | |
15020 | else | |
15021 | { | |
15022 | new_field->next = fip->fields; | |
15023 | fip->fields = new_field; | |
15024 | } | |
c906108c SS |
15025 | fip->nfields++; |
15026 | ||
e142c38c | 15027 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
15028 | if (attr) |
15029 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
15030 | else |
15031 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
15032 | if (new_field->accessibility != DW_ACCESS_public) |
15033 | fip->non_public_fields = 1; | |
60d5a603 | 15034 | |
e142c38c | 15035 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
15036 | if (attr) |
15037 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
15038 | else |
15039 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
15040 | |
15041 | fp = &new_field->field; | |
a9a9bd0f | 15042 | |
e142c38c | 15043 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 15044 | { |
74ac6d43 TT |
15045 | LONGEST offset; |
15046 | ||
a9a9bd0f | 15047 | /* Data member other than a C++ static data member. */ |
6e70227d | 15048 | |
c906108c | 15049 | /* Get type of field. */ |
e7c27a73 | 15050 | fp->type = die_type (die, cu); |
c906108c | 15051 | |
d6a843b5 | 15052 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 15053 | |
c906108c | 15054 | /* Get bit size of field (zero if none). */ |
e142c38c | 15055 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
15056 | if (attr) |
15057 | { | |
15058 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
15059 | } | |
15060 | else | |
15061 | { | |
15062 | FIELD_BITSIZE (*fp) = 0; | |
15063 | } | |
15064 | ||
15065 | /* Get bit offset of field. */ | |
74ac6d43 TT |
15066 | if (handle_data_member_location (die, cu, &offset)) |
15067 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 15068 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
15069 | if (attr) |
15070 | { | |
5e2b427d | 15071 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
15072 | { |
15073 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
15074 | additional bit offset from the MSB of the containing |
15075 | anonymous object to the MSB of the field. We don't | |
15076 | have to do anything special since we don't need to | |
15077 | know the size of the anonymous object. */ | |
f41f5e61 | 15078 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
15079 | } |
15080 | else | |
15081 | { | |
15082 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
15083 | MSB of the anonymous object, subtract off the number of |
15084 | bits from the MSB of the field to the MSB of the | |
15085 | object, and then subtract off the number of bits of | |
15086 | the field itself. The result is the bit offset of | |
15087 | the LSB of the field. */ | |
c906108c SS |
15088 | int anonymous_size; |
15089 | int bit_offset = DW_UNSND (attr); | |
15090 | ||
e142c38c | 15091 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15092 | if (attr) |
15093 | { | |
15094 | /* The size of the anonymous object containing | |
15095 | the bit field is explicit, so use the | |
15096 | indicated size (in bytes). */ | |
15097 | anonymous_size = DW_UNSND (attr); | |
15098 | } | |
15099 | else | |
15100 | { | |
15101 | /* The size of the anonymous object containing | |
15102 | the bit field must be inferred from the type | |
15103 | attribute of the data member containing the | |
15104 | bit field. */ | |
15105 | anonymous_size = TYPE_LENGTH (fp->type); | |
15106 | } | |
f41f5e61 PA |
15107 | SET_FIELD_BITPOS (*fp, |
15108 | (FIELD_BITPOS (*fp) | |
15109 | + anonymous_size * bits_per_byte | |
15110 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
15111 | } |
15112 | } | |
da5b30da AA |
15113 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
15114 | if (attr != NULL) | |
15115 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
15116 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
15117 | |
15118 | /* Get name of field. */ | |
39cbfefa DJ |
15119 | fieldname = dwarf2_name (die, cu); |
15120 | if (fieldname == NULL) | |
15121 | fieldname = ""; | |
d8151005 DJ |
15122 | |
15123 | /* The name is already allocated along with this objfile, so we don't | |
15124 | need to duplicate it for the type. */ | |
15125 | fp->name = fieldname; | |
c906108c SS |
15126 | |
15127 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 15128 | pointer or virtual base class pointer) to private. */ |
e142c38c | 15129 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 15130 | { |
d48cc9dd | 15131 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
15132 | new_field->accessibility = DW_ACCESS_private; |
15133 | fip->non_public_fields = 1; | |
15134 | } | |
15135 | } | |
a9a9bd0f | 15136 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 15137 | { |
a9a9bd0f DC |
15138 | /* C++ static member. */ |
15139 | ||
15140 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
15141 | is a declaration, but all versions of G++ as of this writing | |
15142 | (so through at least 3.2.1) incorrectly generate | |
15143 | DW_TAG_variable tags. */ | |
6e70227d | 15144 | |
ff355380 | 15145 | const char *physname; |
c906108c | 15146 | |
a9a9bd0f | 15147 | /* Get name of field. */ |
39cbfefa DJ |
15148 | fieldname = dwarf2_name (die, cu); |
15149 | if (fieldname == NULL) | |
c906108c SS |
15150 | return; |
15151 | ||
254e6b9e | 15152 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
15153 | if (attr |
15154 | /* Only create a symbol if this is an external value. | |
15155 | new_symbol checks this and puts the value in the global symbol | |
15156 | table, which we want. If it is not external, new_symbol | |
15157 | will try to put the value in cu->list_in_scope which is wrong. */ | |
15158 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
15159 | { |
15160 | /* A static const member, not much different than an enum as far as | |
15161 | we're concerned, except that we can support more types. */ | |
15162 | new_symbol (die, NULL, cu); | |
15163 | } | |
15164 | ||
2df3850c | 15165 | /* Get physical name. */ |
ff355380 | 15166 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 15167 | |
d8151005 DJ |
15168 | /* The name is already allocated along with this objfile, so we don't |
15169 | need to duplicate it for the type. */ | |
15170 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 15171 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 15172 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
15173 | } |
15174 | else if (die->tag == DW_TAG_inheritance) | |
15175 | { | |
74ac6d43 | 15176 | LONGEST offset; |
d4b96c9a | 15177 | |
74ac6d43 TT |
15178 | /* C++ base class field. */ |
15179 | if (handle_data_member_location (die, cu, &offset)) | |
15180 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 15181 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 15182 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
15183 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
15184 | fip->nbaseclasses++; | |
15185 | } | |
15186 | } | |
15187 | ||
883fd55a KS |
15188 | /* Can the type given by DIE define another type? */ |
15189 | ||
15190 | static bool | |
15191 | type_can_define_types (const struct die_info *die) | |
15192 | { | |
15193 | switch (die->tag) | |
15194 | { | |
15195 | case DW_TAG_typedef: | |
15196 | case DW_TAG_class_type: | |
15197 | case DW_TAG_structure_type: | |
15198 | case DW_TAG_union_type: | |
15199 | case DW_TAG_enumeration_type: | |
15200 | return true; | |
15201 | ||
15202 | default: | |
15203 | return false; | |
15204 | } | |
15205 | } | |
15206 | ||
15207 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
15208 | |
15209 | static void | |
883fd55a KS |
15210 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
15211 | struct dwarf2_cu *cu) | |
6e70227d | 15212 | { |
883fd55a KS |
15213 | struct decl_field_list *new_field; |
15214 | struct decl_field *fp; | |
98751a41 JK |
15215 | |
15216 | /* Allocate a new field list entry and link it in. */ | |
883fd55a | 15217 | new_field = XCNEW (struct decl_field_list); |
98751a41 JK |
15218 | make_cleanup (xfree, new_field); |
15219 | ||
883fd55a | 15220 | gdb_assert (type_can_define_types (die)); |
98751a41 JK |
15221 | |
15222 | fp = &new_field->field; | |
15223 | ||
883fd55a | 15224 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
98751a41 | 15225 | fp->name = dwarf2_name (die, cu); |
98751a41 JK |
15226 | fp->type = read_type_die (die, cu); |
15227 | ||
c191a687 KS |
15228 | /* Save accessibility. */ |
15229 | enum dwarf_access_attribute accessibility; | |
15230 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
15231 | if (attr != NULL) | |
15232 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
15233 | else | |
15234 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15235 | switch (accessibility) | |
15236 | { | |
15237 | case DW_ACCESS_public: | |
15238 | /* The assumed value if neither private nor protected. */ | |
15239 | break; | |
15240 | case DW_ACCESS_private: | |
15241 | fp->is_private = 1; | |
15242 | break; | |
15243 | case DW_ACCESS_protected: | |
15244 | fp->is_protected = 1; | |
15245 | break; | |
15246 | default: | |
37534686 KS |
15247 | complaint (&symfile_complaints, |
15248 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); | |
c191a687 KS |
15249 | } |
15250 | ||
883fd55a KS |
15251 | if (die->tag == DW_TAG_typedef) |
15252 | { | |
15253 | new_field->next = fip->typedef_field_list; | |
15254 | fip->typedef_field_list = new_field; | |
15255 | fip->typedef_field_list_count++; | |
15256 | } | |
15257 | else | |
15258 | { | |
15259 | new_field->next = fip->nested_types_list; | |
15260 | fip->nested_types_list = new_field; | |
15261 | fip->nested_types_list_count++; | |
15262 | } | |
98751a41 JK |
15263 | } |
15264 | ||
c906108c SS |
15265 | /* Create the vector of fields, and attach it to the type. */ |
15266 | ||
15267 | static void | |
fba45db2 | 15268 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15269 | struct dwarf2_cu *cu) |
c906108c SS |
15270 | { |
15271 | int nfields = fip->nfields; | |
15272 | ||
15273 | /* Record the field count, allocate space for the array of fields, | |
15274 | and create blank accessibility bitfields if necessary. */ | |
15275 | TYPE_NFIELDS (type) = nfields; | |
15276 | TYPE_FIELDS (type) = (struct field *) | |
15277 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
15278 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
15279 | ||
b4ba55a1 | 15280 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
15281 | { |
15282 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15283 | ||
15284 | TYPE_FIELD_PRIVATE_BITS (type) = | |
15285 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15286 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
15287 | ||
15288 | TYPE_FIELD_PROTECTED_BITS (type) = | |
15289 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15290 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
15291 | ||
774b6a14 TT |
15292 | TYPE_FIELD_IGNORE_BITS (type) = |
15293 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15294 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
15295 | } |
15296 | ||
15297 | /* If the type has baseclasses, allocate and clear a bit vector for | |
15298 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 15299 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
15300 | { |
15301 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 15302 | unsigned char *pointer; |
c906108c SS |
15303 | |
15304 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 15305 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 15306 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
15307 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
15308 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
15309 | } | |
15310 | ||
3e43a32a MS |
15311 | /* Copy the saved-up fields into the field vector. Start from the head of |
15312 | the list, adding to the tail of the field array, so that they end up in | |
15313 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
15314 | while (nfields-- > 0) |
15315 | { | |
7d0ccb61 DJ |
15316 | struct nextfield *fieldp; |
15317 | ||
15318 | if (fip->fields) | |
15319 | { | |
15320 | fieldp = fip->fields; | |
15321 | fip->fields = fieldp->next; | |
15322 | } | |
15323 | else | |
15324 | { | |
15325 | fieldp = fip->baseclasses; | |
15326 | fip->baseclasses = fieldp->next; | |
15327 | } | |
15328 | ||
15329 | TYPE_FIELD (type, nfields) = fieldp->field; | |
15330 | switch (fieldp->accessibility) | |
c906108c | 15331 | { |
c5aa993b | 15332 | case DW_ACCESS_private: |
b4ba55a1 JB |
15333 | if (cu->language != language_ada) |
15334 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 15335 | break; |
c906108c | 15336 | |
c5aa993b | 15337 | case DW_ACCESS_protected: |
b4ba55a1 JB |
15338 | if (cu->language != language_ada) |
15339 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 15340 | break; |
c906108c | 15341 | |
c5aa993b JM |
15342 | case DW_ACCESS_public: |
15343 | break; | |
c906108c | 15344 | |
c5aa993b JM |
15345 | default: |
15346 | /* Unknown accessibility. Complain and treat it as public. */ | |
15347 | { | |
e2e0b3e5 | 15348 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 15349 | fieldp->accessibility); |
c5aa993b JM |
15350 | } |
15351 | break; | |
c906108c SS |
15352 | } |
15353 | if (nfields < fip->nbaseclasses) | |
15354 | { | |
7d0ccb61 | 15355 | switch (fieldp->virtuality) |
c906108c | 15356 | { |
c5aa993b JM |
15357 | case DW_VIRTUALITY_virtual: |
15358 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 15359 | if (cu->language == language_ada) |
a73c6dcd | 15360 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
15361 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
15362 | break; | |
c906108c SS |
15363 | } |
15364 | } | |
c906108c SS |
15365 | } |
15366 | } | |
15367 | ||
7d27a96d TT |
15368 | /* Return true if this member function is a constructor, false |
15369 | otherwise. */ | |
15370 | ||
15371 | static int | |
15372 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
15373 | { | |
15374 | const char *fieldname; | |
fe978cb0 | 15375 | const char *type_name; |
7d27a96d TT |
15376 | int len; |
15377 | ||
15378 | if (die->parent == NULL) | |
15379 | return 0; | |
15380 | ||
15381 | if (die->parent->tag != DW_TAG_structure_type | |
15382 | && die->parent->tag != DW_TAG_union_type | |
15383 | && die->parent->tag != DW_TAG_class_type) | |
15384 | return 0; | |
15385 | ||
15386 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
15387 | type_name = dwarf2_name (die->parent, cu); |
15388 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
15389 | return 0; |
15390 | ||
15391 | len = strlen (fieldname); | |
fe978cb0 PA |
15392 | return (strncmp (fieldname, type_name, len) == 0 |
15393 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
15394 | } |
15395 | ||
c906108c SS |
15396 | /* Add a member function to the proper fieldlist. */ |
15397 | ||
15398 | static void | |
107d2387 | 15399 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15400 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 15401 | { |
e7c27a73 | 15402 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15403 | struct attribute *attr; |
15404 | struct fnfieldlist *flp; | |
15405 | int i; | |
15406 | struct fn_field *fnp; | |
15d034d0 | 15407 | const char *fieldname; |
c906108c | 15408 | struct nextfnfield *new_fnfield; |
f792889a | 15409 | struct type *this_type; |
60d5a603 | 15410 | enum dwarf_access_attribute accessibility; |
c906108c | 15411 | |
b4ba55a1 | 15412 | if (cu->language == language_ada) |
a73c6dcd | 15413 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 15414 | |
2df3850c | 15415 | /* Get name of member function. */ |
39cbfefa DJ |
15416 | fieldname = dwarf2_name (die, cu); |
15417 | if (fieldname == NULL) | |
2df3850c | 15418 | return; |
c906108c | 15419 | |
c906108c SS |
15420 | /* Look up member function name in fieldlist. */ |
15421 | for (i = 0; i < fip->nfnfields; i++) | |
15422 | { | |
27bfe10e | 15423 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
15424 | break; |
15425 | } | |
15426 | ||
15427 | /* Create new list element if necessary. */ | |
15428 | if (i < fip->nfnfields) | |
15429 | flp = &fip->fnfieldlists[i]; | |
15430 | else | |
15431 | { | |
15432 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
15433 | { | |
15434 | fip->fnfieldlists = (struct fnfieldlist *) | |
15435 | xrealloc (fip->fnfieldlists, | |
15436 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 15437 | * sizeof (struct fnfieldlist)); |
c906108c | 15438 | if (fip->nfnfields == 0) |
c13c43fd | 15439 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
15440 | } |
15441 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
15442 | flp->name = fieldname; | |
15443 | flp->length = 0; | |
15444 | flp->head = NULL; | |
3da10d80 | 15445 | i = fip->nfnfields++; |
c906108c SS |
15446 | } |
15447 | ||
15448 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 15449 | entry. */ |
8d749320 | 15450 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 15451 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
15452 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
15453 | new_fnfield->next = flp->head; | |
15454 | flp->head = new_fnfield; | |
15455 | flp->length++; | |
15456 | ||
15457 | /* Fill in the member function field info. */ | |
15458 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
15459 | |
15460 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 15461 | if (cu->language == language_cplus) |
3da10d80 KS |
15462 | { |
15463 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
15464 | die, cu); | |
15465 | } | |
15466 | else | |
15467 | { | |
1d06ead6 | 15468 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
15469 | fnp->physname = physname ? physname : ""; |
15470 | } | |
15471 | ||
c906108c | 15472 | fnp->type = alloc_type (objfile); |
f792889a DJ |
15473 | this_type = read_type_die (die, cu); |
15474 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 15475 | { |
f792889a | 15476 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 15477 | |
f792889a | 15478 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
15479 | of the method itself (TYPE_CODE_METHOD). */ |
15480 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
15481 | TYPE_TARGET_TYPE (this_type), |
15482 | TYPE_FIELDS (this_type), | |
15483 | TYPE_NFIELDS (this_type), | |
15484 | TYPE_VARARGS (this_type)); | |
c906108c SS |
15485 | |
15486 | /* Handle static member functions. | |
c5aa993b | 15487 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
15488 | member functions. G++ helps GDB by marking the first |
15489 | parameter for non-static member functions (which is the this | |
15490 | pointer) as artificial. We obtain this information from | |
15491 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 15492 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
15493 | fnp->voffset = VOFFSET_STATIC; |
15494 | } | |
15495 | else | |
e2e0b3e5 | 15496 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 15497 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
15498 | |
15499 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 15500 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 15501 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 15502 | |
3e43a32a MS |
15503 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
15504 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
15505 | |
15506 | /* Get accessibility. */ | |
e142c38c | 15507 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 15508 | if (attr) |
aead7601 | 15509 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
15510 | else |
15511 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15512 | switch (accessibility) | |
c906108c | 15513 | { |
60d5a603 JK |
15514 | case DW_ACCESS_private: |
15515 | fnp->is_private = 1; | |
15516 | break; | |
15517 | case DW_ACCESS_protected: | |
15518 | fnp->is_protected = 1; | |
15519 | break; | |
c906108c SS |
15520 | } |
15521 | ||
b02dede2 | 15522 | /* Check for artificial methods. */ |
e142c38c | 15523 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
15524 | if (attr && DW_UNSND (attr) != 0) |
15525 | fnp->is_artificial = 1; | |
15526 | ||
7d27a96d TT |
15527 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15528 | ||
0d564a31 | 15529 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15530 | function. For older versions of GCC, this is an offset in the |
15531 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15532 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15533 | to the object address. */ |
15534 | ||
e142c38c | 15535 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 15536 | if (attr) |
8e19ed76 | 15537 | { |
aec5aa8b | 15538 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 15539 | { |
aec5aa8b TT |
15540 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
15541 | { | |
15542 | /* Old-style GCC. */ | |
15543 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
15544 | } | |
15545 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
15546 | || (DW_BLOCK (attr)->size > 1 | |
15547 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
15548 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
15549 | { | |
aec5aa8b TT |
15550 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
15551 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
15552 | dwarf2_complex_location_expr_complaint (); | |
15553 | else | |
15554 | fnp->voffset /= cu->header.addr_size; | |
15555 | fnp->voffset += 2; | |
15556 | } | |
15557 | else | |
15558 | dwarf2_complex_location_expr_complaint (); | |
15559 | ||
15560 | if (!fnp->fcontext) | |
7e993ebf KS |
15561 | { |
15562 | /* If there is no `this' field and no DW_AT_containing_type, | |
15563 | we cannot actually find a base class context for the | |
15564 | vtable! */ | |
15565 | if (TYPE_NFIELDS (this_type) == 0 | |
15566 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
15567 | { | |
15568 | complaint (&symfile_complaints, | |
15569 | _("cannot determine context for virtual member " | |
15570 | "function \"%s\" (offset %d)"), | |
9c541725 | 15571 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
15572 | } |
15573 | else | |
15574 | { | |
15575 | fnp->fcontext | |
15576 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
15577 | } | |
15578 | } | |
aec5aa8b | 15579 | } |
3690dd37 | 15580 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 15581 | { |
4d3c2250 | 15582 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15583 | } |
15584 | else | |
15585 | { | |
4d3c2250 KB |
15586 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15587 | fieldname); | |
8e19ed76 | 15588 | } |
0d564a31 | 15589 | } |
d48cc9dd DJ |
15590 | else |
15591 | { | |
15592 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
15593 | if (attr && DW_UNSND (attr)) | |
15594 | { | |
15595 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
15596 | complaint (&symfile_complaints, | |
3e43a32a MS |
15597 | _("Member function \"%s\" (offset %d) is virtual " |
15598 | "but the vtable offset is not specified"), | |
9c541725 | 15599 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 15600 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15601 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15602 | } | |
15603 | } | |
c906108c SS |
15604 | } |
15605 | ||
15606 | /* Create the vector of member function fields, and attach it to the type. */ | |
15607 | ||
15608 | static void | |
fba45db2 | 15609 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15610 | struct dwarf2_cu *cu) |
c906108c SS |
15611 | { |
15612 | struct fnfieldlist *flp; | |
c906108c SS |
15613 | int i; |
15614 | ||
b4ba55a1 | 15615 | if (cu->language == language_ada) |
a73c6dcd | 15616 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15617 | |
c906108c SS |
15618 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15619 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
15620 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
15621 | ||
15622 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
15623 | { | |
15624 | struct nextfnfield *nfp = flp->head; | |
15625 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
15626 | int k; | |
15627 | ||
15628 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
15629 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
15630 | fn_flp->fn_fields = (struct fn_field *) | |
15631 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
15632 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 15633 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
15634 | } |
15635 | ||
15636 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
15637 | } |
15638 | ||
1168df01 JB |
15639 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15640 | language, zero otherwise. */ | |
15641 | static int | |
15642 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15643 | { | |
15644 | static const char vptr[] = "_vptr"; | |
15645 | ||
9c37b5ae TT |
15646 | /* Look for the C++ form of the vtable. */ |
15647 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15648 | return 1; |
15649 | ||
15650 | return 0; | |
15651 | } | |
15652 | ||
c0dd20ea | 15653 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15654 | functions, with the ABI-specified layout. If TYPE describes |
15655 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15656 | |
15657 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15658 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15659 | |
0b92b5bb TT |
15660 | static void |
15661 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15662 | { |
09e2d7c7 | 15663 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15664 | |
15665 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
15666 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
15667 | return; | |
c0dd20ea DJ |
15668 | |
15669 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15670 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15671 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15672 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15673 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15674 | return; | |
c0dd20ea DJ |
15675 | |
15676 | /* Find the type of the method. */ | |
0b92b5bb | 15677 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
15678 | if (pfn_type == NULL |
15679 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
15680 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 15681 | return; |
c0dd20ea DJ |
15682 | |
15683 | /* Look for the "this" argument. */ | |
15684 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
15685 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 15686 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 15687 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 15688 | return; |
c0dd20ea | 15689 | |
09e2d7c7 | 15690 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 15691 | new_type = alloc_type (objfile); |
09e2d7c7 | 15692 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
15693 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
15694 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 15695 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15696 | } |
1168df01 | 15697 | |
685b1105 | 15698 | |
c906108c | 15699 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15700 | (definition) to create a type for the structure or union. Fill in |
15701 | the type's name and general properties; the members will not be | |
83655187 DE |
15702 | processed until process_structure_scope. A symbol table entry for |
15703 | the type will also not be done until process_structure_scope (assuming | |
15704 | the type has a name). | |
c906108c | 15705 | |
c767944b DJ |
15706 | NOTE: we need to call these functions regardless of whether or not the |
15707 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15708 | structure or union. This gets the type entered into our set of |
83655187 | 15709 | user defined types. */ |
c906108c | 15710 | |
f792889a | 15711 | static struct type * |
134d01f1 | 15712 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15713 | { |
e7c27a73 | 15714 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15715 | struct type *type; |
15716 | struct attribute *attr; | |
15d034d0 | 15717 | const char *name; |
c906108c | 15718 | |
348e048f DE |
15719 | /* If the definition of this type lives in .debug_types, read that type. |
15720 | Don't follow DW_AT_specification though, that will take us back up | |
15721 | the chain and we want to go down. */ | |
45e58e77 | 15722 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
15723 | if (attr) |
15724 | { | |
ac9ec31b | 15725 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15726 | |
ac9ec31b | 15727 | /* The type's CU may not be the same as CU. |
02142a6c | 15728 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15729 | return set_die_type (die, type, cu); |
15730 | } | |
15731 | ||
c0dd20ea | 15732 | type = alloc_type (objfile); |
c906108c | 15733 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15734 | |
39cbfefa DJ |
15735 | name = dwarf2_name (die, cu); |
15736 | if (name != NULL) | |
c906108c | 15737 | { |
987504bb | 15738 | if (cu->language == language_cplus |
c44af4eb TT |
15739 | || cu->language == language_d |
15740 | || cu->language == language_rust) | |
63d06c5c | 15741 | { |
15d034d0 | 15742 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15743 | |
15744 | /* dwarf2_full_name might have already finished building the DIE's | |
15745 | type. If so, there is no need to continue. */ | |
15746 | if (get_die_type (die, cu) != NULL) | |
15747 | return get_die_type (die, cu); | |
15748 | ||
15749 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
15750 | if (die->tag == DW_TAG_structure_type |
15751 | || die->tag == DW_TAG_class_type) | |
15752 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
15753 | } |
15754 | else | |
15755 | { | |
d8151005 DJ |
15756 | /* The name is already allocated along with this objfile, so |
15757 | we don't need to duplicate it for the type. */ | |
7d455152 | 15758 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
15759 | if (die->tag == DW_TAG_class_type) |
15760 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 15761 | } |
c906108c SS |
15762 | } |
15763 | ||
15764 | if (die->tag == DW_TAG_structure_type) | |
15765 | { | |
15766 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15767 | } | |
15768 | else if (die->tag == DW_TAG_union_type) | |
15769 | { | |
15770 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15771 | } | |
15772 | else | |
15773 | { | |
4753d33b | 15774 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15775 | } |
15776 | ||
0cc2414c TT |
15777 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15778 | TYPE_DECLARED_CLASS (type) = 1; | |
15779 | ||
e142c38c | 15780 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15781 | if (attr) |
15782 | { | |
155bfbd3 JB |
15783 | if (attr_form_is_constant (attr)) |
15784 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15785 | else | |
15786 | { | |
15787 | /* For the moment, dynamic type sizes are not supported | |
15788 | by GDB's struct type. The actual size is determined | |
15789 | on-demand when resolving the type of a given object, | |
15790 | so set the type's length to zero for now. Otherwise, | |
15791 | we record an expression as the length, and that expression | |
15792 | could lead to a very large value, which could eventually | |
15793 | lead to us trying to allocate that much memory when creating | |
15794 | a value of that type. */ | |
15795 | TYPE_LENGTH (type) = 0; | |
15796 | } | |
c906108c SS |
15797 | } |
15798 | else | |
15799 | { | |
15800 | TYPE_LENGTH (type) = 0; | |
15801 | } | |
15802 | ||
5230b05a | 15803 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15804 | { |
5230b05a WT |
15805 | /* ICC<14 does not output the required DW_AT_declaration on |
15806 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15807 | TYPE_STUB (type) = 1; |
685b1105 JK |
15808 | } |
15809 | else | |
15810 | TYPE_STUB_SUPPORTED (type) = 1; | |
15811 | ||
dc718098 | 15812 | if (die_is_declaration (die, cu)) |
876cecd0 | 15813 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15814 | else if (attr == NULL && die->child == NULL |
15815 | && producer_is_realview (cu->producer)) | |
15816 | /* RealView does not output the required DW_AT_declaration | |
15817 | on incomplete types. */ | |
15818 | TYPE_STUB (type) = 1; | |
dc718098 | 15819 | |
c906108c SS |
15820 | /* We need to add the type field to the die immediately so we don't |
15821 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15822 | type within the structure itself. */ |
1c379e20 | 15823 | set_die_type (die, type, cu); |
c906108c | 15824 | |
7e314c57 JK |
15825 | /* set_die_type should be already done. */ |
15826 | set_descriptive_type (type, die, cu); | |
15827 | ||
c767944b DJ |
15828 | return type; |
15829 | } | |
15830 | ||
15831 | /* Finish creating a structure or union type, including filling in | |
15832 | its members and creating a symbol for it. */ | |
15833 | ||
15834 | static void | |
15835 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15836 | { | |
15837 | struct objfile *objfile = cu->objfile; | |
ca040673 | 15838 | struct die_info *child_die; |
c767944b DJ |
15839 | struct type *type; |
15840 | ||
15841 | type = get_die_type (die, cu); | |
15842 | if (type == NULL) | |
15843 | type = read_structure_type (die, cu); | |
15844 | ||
e142c38c | 15845 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15846 | { |
15847 | struct field_info fi; | |
2f4732b0 | 15848 | std::vector<struct symbol *> template_args; |
c767944b | 15849 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
15850 | |
15851 | memset (&fi, 0, sizeof (struct field_info)); | |
15852 | ||
639d11d3 | 15853 | child_die = die->child; |
c906108c SS |
15854 | |
15855 | while (child_die && child_die->tag) | |
15856 | { | |
a9a9bd0f DC |
15857 | if (child_die->tag == DW_TAG_member |
15858 | || child_die->tag == DW_TAG_variable) | |
c906108c | 15859 | { |
a9a9bd0f DC |
15860 | /* NOTE: carlton/2002-11-05: A C++ static data member |
15861 | should be a DW_TAG_member that is a declaration, but | |
15862 | all versions of G++ as of this writing (so through at | |
15863 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15864 | tags for them instead. */ | |
e7c27a73 | 15865 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 15866 | } |
8713b1b1 | 15867 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 15868 | { |
e98c9e7c TT |
15869 | /* Rust doesn't have member functions in the C++ sense. |
15870 | However, it does emit ordinary functions as children | |
15871 | of a struct DIE. */ | |
15872 | if (cu->language == language_rust) | |
15873 | read_func_scope (child_die, cu); | |
15874 | else | |
15875 | { | |
15876 | /* C++ member function. */ | |
15877 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
15878 | } | |
c906108c SS |
15879 | } |
15880 | else if (child_die->tag == DW_TAG_inheritance) | |
15881 | { | |
15882 | /* C++ base class field. */ | |
e7c27a73 | 15883 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 15884 | } |
883fd55a KS |
15885 | else if (type_can_define_types (child_die)) |
15886 | dwarf2_add_type_defn (&fi, child_die, cu); | |
34eaf542 TT |
15887 | else if (child_die->tag == DW_TAG_template_type_param |
15888 | || child_die->tag == DW_TAG_template_value_param) | |
15889 | { | |
15890 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15891 | ||
f1078f66 | 15892 | if (arg != NULL) |
2f4732b0 | 15893 | template_args.push_back (arg); |
34eaf542 TT |
15894 | } |
15895 | ||
c906108c SS |
15896 | child_die = sibling_die (child_die); |
15897 | } | |
15898 | ||
34eaf542 | 15899 | /* Attach template arguments to type. */ |
2f4732b0 | 15900 | if (!template_args.empty ()) |
34eaf542 TT |
15901 | { |
15902 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
2f4732b0 | 15903 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15904 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15905 | = XOBNEWVEC (&objfile->objfile_obstack, |
15906 | struct symbol *, | |
15907 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15908 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15909 | template_args.data (), |
34eaf542 TT |
15910 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15911 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15912 | } |
15913 | ||
c906108c SS |
15914 | /* Attach fields and member functions to the type. */ |
15915 | if (fi.nfields) | |
e7c27a73 | 15916 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
15917 | if (fi.nfnfields) |
15918 | { | |
e7c27a73 | 15919 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15920 | |
c5aa993b | 15921 | /* Get the type which refers to the base class (possibly this |
c906108c | 15922 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15923 | class from the DW_AT_containing_type attribute. This use of |
15924 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15925 | |
e142c38c | 15926 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15927 | { |
e7c27a73 | 15928 | struct type *t = die_containing_type (die, cu); |
c906108c | 15929 | |
ae6ae975 | 15930 | set_type_vptr_basetype (type, t); |
c906108c SS |
15931 | if (type == t) |
15932 | { | |
c906108c SS |
15933 | int i; |
15934 | ||
15935 | /* Our own class provides vtbl ptr. */ | |
15936 | for (i = TYPE_NFIELDS (t) - 1; | |
15937 | i >= TYPE_N_BASECLASSES (t); | |
15938 | --i) | |
15939 | { | |
0d5cff50 | 15940 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15941 | |
1168df01 | 15942 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15943 | { |
ae6ae975 | 15944 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15945 | break; |
15946 | } | |
15947 | } | |
15948 | ||
15949 | /* Complain if virtual function table field not found. */ | |
15950 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 15951 | complaint (&symfile_complaints, |
3e43a32a MS |
15952 | _("virtual function table pointer " |
15953 | "not found when defining class '%s'"), | |
4d3c2250 KB |
15954 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
15955 | ""); | |
c906108c SS |
15956 | } |
15957 | else | |
15958 | { | |
ae6ae975 | 15959 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15960 | } |
15961 | } | |
f6235d4c | 15962 | else if (cu->producer |
61012eef | 15963 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15964 | { |
15965 | /* The IBM XLC compiler does not provide direct indication | |
15966 | of the containing type, but the vtable pointer is | |
15967 | always named __vfp. */ | |
15968 | ||
15969 | int i; | |
15970 | ||
15971 | for (i = TYPE_NFIELDS (type) - 1; | |
15972 | i >= TYPE_N_BASECLASSES (type); | |
15973 | --i) | |
15974 | { | |
15975 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15976 | { | |
ae6ae975 DE |
15977 | set_type_vptr_fieldno (type, i); |
15978 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15979 | break; |
15980 | } | |
15981 | } | |
15982 | } | |
c906108c | 15983 | } |
98751a41 JK |
15984 | |
15985 | /* Copy fi.typedef_field_list linked list elements content into the | |
15986 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
15987 | if (fi.typedef_field_list) | |
15988 | { | |
15989 | int i = fi.typedef_field_list_count; | |
15990 | ||
a0d7a4ff | 15991 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 15992 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 15993 | = ((struct decl_field *) |
224c3ddb | 15994 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); |
98751a41 JK |
15995 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
15996 | ||
15997 | /* Reverse the list order to keep the debug info elements order. */ | |
15998 | while (--i >= 0) | |
15999 | { | |
883fd55a | 16000 | struct decl_field *dest, *src; |
6e70227d | 16001 | |
98751a41 JK |
16002 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
16003 | src = &fi.typedef_field_list->field; | |
16004 | fi.typedef_field_list = fi.typedef_field_list->next; | |
16005 | *dest = *src; | |
16006 | } | |
16007 | } | |
c767944b | 16008 | |
883fd55a KS |
16009 | /* Copy fi.nested_types_list linked list elements content into the |
16010 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
16011 | if (fi.nested_types_list != NULL && cu->language != language_ada) | |
16012 | { | |
16013 | int i = fi.nested_types_list_count; | |
16014 | ||
16015 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
16016 | TYPE_NESTED_TYPES_ARRAY (type) | |
16017 | = ((struct decl_field *) | |
16018 | TYPE_ALLOC (type, sizeof (struct decl_field) * i)); | |
16019 | TYPE_NESTED_TYPES_COUNT (type) = i; | |
16020 | ||
16021 | /* Reverse the list order to keep the debug info elements order. */ | |
16022 | while (--i >= 0) | |
16023 | { | |
16024 | struct decl_field *dest, *src; | |
16025 | ||
16026 | dest = &TYPE_NESTED_TYPES_FIELD (type, i); | |
16027 | src = &fi.nested_types_list->field; | |
16028 | fi.nested_types_list = fi.nested_types_list->next; | |
16029 | *dest = *src; | |
16030 | } | |
16031 | } | |
16032 | ||
c767944b | 16033 | do_cleanups (back_to); |
c906108c | 16034 | } |
63d06c5c | 16035 | |
bb5ed363 | 16036 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 16037 | |
90aeadfc DC |
16038 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
16039 | snapshots) has been known to create a die giving a declaration | |
16040 | for a class that has, as a child, a die giving a definition for a | |
16041 | nested class. So we have to process our children even if the | |
16042 | current die is a declaration. Normally, of course, a declaration | |
16043 | won't have any children at all. */ | |
134d01f1 | 16044 | |
ca040673 DE |
16045 | child_die = die->child; |
16046 | ||
90aeadfc DC |
16047 | while (child_die != NULL && child_die->tag) |
16048 | { | |
16049 | if (child_die->tag == DW_TAG_member | |
16050 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
16051 | || child_die->tag == DW_TAG_inheritance |
16052 | || child_die->tag == DW_TAG_template_value_param | |
16053 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 16054 | { |
90aeadfc | 16055 | /* Do nothing. */ |
134d01f1 | 16056 | } |
90aeadfc DC |
16057 | else |
16058 | process_die (child_die, cu); | |
134d01f1 | 16059 | |
90aeadfc | 16060 | child_die = sibling_die (child_die); |
134d01f1 DJ |
16061 | } |
16062 | ||
fa4028e9 JB |
16063 | /* Do not consider external references. According to the DWARF standard, |
16064 | these DIEs are identified by the fact that they have no byte_size | |
16065 | attribute, and a declaration attribute. */ | |
16066 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
16067 | || !die_is_declaration (die, cu)) | |
c767944b | 16068 | new_symbol (die, type, cu); |
134d01f1 DJ |
16069 | } |
16070 | ||
55426c9d JB |
16071 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
16072 | update TYPE using some information only available in DIE's children. */ | |
16073 | ||
16074 | static void | |
16075 | update_enumeration_type_from_children (struct die_info *die, | |
16076 | struct type *type, | |
16077 | struct dwarf2_cu *cu) | |
16078 | { | |
60f7655a | 16079 | struct die_info *child_die; |
55426c9d JB |
16080 | int unsigned_enum = 1; |
16081 | int flag_enum = 1; | |
16082 | ULONGEST mask = 0; | |
55426c9d | 16083 | |
8268c778 | 16084 | auto_obstack obstack; |
55426c9d | 16085 | |
60f7655a DE |
16086 | for (child_die = die->child; |
16087 | child_die != NULL && child_die->tag; | |
16088 | child_die = sibling_die (child_die)) | |
55426c9d JB |
16089 | { |
16090 | struct attribute *attr; | |
16091 | LONGEST value; | |
16092 | const gdb_byte *bytes; | |
16093 | struct dwarf2_locexpr_baton *baton; | |
16094 | const char *name; | |
60f7655a | 16095 | |
55426c9d JB |
16096 | if (child_die->tag != DW_TAG_enumerator) |
16097 | continue; | |
16098 | ||
16099 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
16100 | if (attr == NULL) | |
16101 | continue; | |
16102 | ||
16103 | name = dwarf2_name (child_die, cu); | |
16104 | if (name == NULL) | |
16105 | name = "<anonymous enumerator>"; | |
16106 | ||
16107 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
16108 | &value, &bytes, &baton); | |
16109 | if (value < 0) | |
16110 | { | |
16111 | unsigned_enum = 0; | |
16112 | flag_enum = 0; | |
16113 | } | |
16114 | else if ((mask & value) != 0) | |
16115 | flag_enum = 0; | |
16116 | else | |
16117 | mask |= value; | |
16118 | ||
16119 | /* If we already know that the enum type is neither unsigned, nor | |
16120 | a flag type, no need to look at the rest of the enumerates. */ | |
16121 | if (!unsigned_enum && !flag_enum) | |
16122 | break; | |
55426c9d JB |
16123 | } |
16124 | ||
16125 | if (unsigned_enum) | |
16126 | TYPE_UNSIGNED (type) = 1; | |
16127 | if (flag_enum) | |
16128 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
16129 | } |
16130 | ||
134d01f1 DJ |
16131 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
16132 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 16133 | |
f792889a | 16134 | static struct type * |
134d01f1 | 16135 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16136 | { |
e7c27a73 | 16137 | struct objfile *objfile = cu->objfile; |
c906108c | 16138 | struct type *type; |
c906108c | 16139 | struct attribute *attr; |
0114d602 | 16140 | const char *name; |
134d01f1 | 16141 | |
348e048f DE |
16142 | /* If the definition of this type lives in .debug_types, read that type. |
16143 | Don't follow DW_AT_specification though, that will take us back up | |
16144 | the chain and we want to go down. */ | |
45e58e77 | 16145 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
16146 | if (attr) |
16147 | { | |
ac9ec31b | 16148 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 16149 | |
ac9ec31b | 16150 | /* The type's CU may not be the same as CU. |
02142a6c | 16151 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
16152 | return set_die_type (die, type, cu); |
16153 | } | |
16154 | ||
c906108c SS |
16155 | type = alloc_type (objfile); |
16156 | ||
16157 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 16158 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 16159 | if (name != NULL) |
7d455152 | 16160 | TYPE_TAG_NAME (type) = name; |
c906108c | 16161 | |
0626fc76 TT |
16162 | attr = dwarf2_attr (die, DW_AT_type, cu); |
16163 | if (attr != NULL) | |
16164 | { | |
16165 | struct type *underlying_type = die_type (die, cu); | |
16166 | ||
16167 | TYPE_TARGET_TYPE (type) = underlying_type; | |
16168 | } | |
16169 | ||
e142c38c | 16170 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16171 | if (attr) |
16172 | { | |
16173 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16174 | } | |
16175 | else | |
16176 | { | |
16177 | TYPE_LENGTH (type) = 0; | |
16178 | } | |
16179 | ||
137033e9 JB |
16180 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
16181 | declared as private in the package spec, and then defined only | |
16182 | inside the package body. Such types are known as Taft Amendment | |
16183 | Types. When another package uses such a type, an incomplete DIE | |
16184 | may be generated by the compiler. */ | |
02eb380e | 16185 | if (die_is_declaration (die, cu)) |
876cecd0 | 16186 | TYPE_STUB (type) = 1; |
02eb380e | 16187 | |
0626fc76 TT |
16188 | /* Finish the creation of this type by using the enum's children. |
16189 | We must call this even when the underlying type has been provided | |
16190 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
16191 | update_enumeration_type_from_children (die, type, cu); |
16192 | ||
0626fc76 TT |
16193 | /* If this type has an underlying type that is not a stub, then we |
16194 | may use its attributes. We always use the "unsigned" attribute | |
16195 | in this situation, because ordinarily we guess whether the type | |
16196 | is unsigned -- but the guess can be wrong and the underlying type | |
16197 | can tell us the reality. However, we defer to a local size | |
16198 | attribute if one exists, because this lets the compiler override | |
16199 | the underlying type if needed. */ | |
16200 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
16201 | { | |
16202 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
16203 | if (TYPE_LENGTH (type) == 0) | |
16204 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
16205 | } | |
16206 | ||
3d567982 TT |
16207 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
16208 | ||
f792889a | 16209 | return set_die_type (die, type, cu); |
134d01f1 DJ |
16210 | } |
16211 | ||
16212 | /* Given a pointer to a die which begins an enumeration, process all | |
16213 | the dies that define the members of the enumeration, and create the | |
16214 | symbol for the enumeration type. | |
16215 | ||
16216 | NOTE: We reverse the order of the element list. */ | |
16217 | ||
16218 | static void | |
16219 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16220 | { | |
f792889a | 16221 | struct type *this_type; |
134d01f1 | 16222 | |
f792889a DJ |
16223 | this_type = get_die_type (die, cu); |
16224 | if (this_type == NULL) | |
16225 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16226 | |
639d11d3 | 16227 | if (die->child != NULL) |
c906108c | 16228 | { |
9dc481d3 DE |
16229 | struct die_info *child_die; |
16230 | struct symbol *sym; | |
16231 | struct field *fields = NULL; | |
16232 | int num_fields = 0; | |
15d034d0 | 16233 | const char *name; |
9dc481d3 | 16234 | |
639d11d3 | 16235 | child_die = die->child; |
c906108c SS |
16236 | while (child_die && child_die->tag) |
16237 | { | |
16238 | if (child_die->tag != DW_TAG_enumerator) | |
16239 | { | |
e7c27a73 | 16240 | process_die (child_die, cu); |
c906108c SS |
16241 | } |
16242 | else | |
16243 | { | |
39cbfefa DJ |
16244 | name = dwarf2_name (child_die, cu); |
16245 | if (name) | |
c906108c | 16246 | { |
f792889a | 16247 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
16248 | |
16249 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
16250 | { | |
16251 | fields = (struct field *) | |
16252 | xrealloc (fields, | |
16253 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 16254 | * sizeof (struct field)); |
c906108c SS |
16255 | } |
16256 | ||
3567439c | 16257 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 16258 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 16259 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
16260 | FIELD_BITSIZE (fields[num_fields]) = 0; |
16261 | ||
16262 | num_fields++; | |
16263 | } | |
16264 | } | |
16265 | ||
16266 | child_die = sibling_die (child_die); | |
16267 | } | |
16268 | ||
16269 | if (num_fields) | |
16270 | { | |
f792889a DJ |
16271 | TYPE_NFIELDS (this_type) = num_fields; |
16272 | TYPE_FIELDS (this_type) = (struct field *) | |
16273 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
16274 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 16275 | sizeof (struct field) * num_fields); |
b8c9b27d | 16276 | xfree (fields); |
c906108c | 16277 | } |
c906108c | 16278 | } |
134d01f1 | 16279 | |
6c83ed52 TT |
16280 | /* If we are reading an enum from a .debug_types unit, and the enum |
16281 | is a declaration, and the enum is not the signatured type in the | |
16282 | unit, then we do not want to add a symbol for it. Adding a | |
16283 | symbol would in some cases obscure the true definition of the | |
16284 | enum, giving users an incomplete type when the definition is | |
16285 | actually available. Note that we do not want to do this for all | |
16286 | enums which are just declarations, because C++0x allows forward | |
16287 | enum declarations. */ | |
3019eac3 | 16288 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16289 | && die_is_declaration (die, cu)) |
16290 | { | |
52dc124a | 16291 | struct signatured_type *sig_type; |
6c83ed52 | 16292 | |
c0f78cd4 | 16293 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16294 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16295 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16296 | return; |
16297 | } | |
16298 | ||
f792889a | 16299 | new_symbol (die, this_type, cu); |
c906108c SS |
16300 | } |
16301 | ||
16302 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
16303 | the DIE's type field. For now, this only handles one dimensional | |
16304 | arrays. */ | |
16305 | ||
f792889a | 16306 | static struct type * |
e7c27a73 | 16307 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16308 | { |
e7c27a73 | 16309 | struct objfile *objfile = cu->objfile; |
c906108c | 16310 | struct die_info *child_die; |
7e314c57 | 16311 | struct type *type; |
c906108c | 16312 | struct type *element_type, *range_type, *index_type; |
c906108c | 16313 | struct attribute *attr; |
15d034d0 | 16314 | const char *name; |
dc53a7ad | 16315 | unsigned int bit_stride = 0; |
c906108c | 16316 | |
e7c27a73 | 16317 | element_type = die_type (die, cu); |
c906108c | 16318 | |
7e314c57 JK |
16319 | /* The die_type call above may have already set the type for this DIE. */ |
16320 | type = get_die_type (die, cu); | |
16321 | if (type) | |
16322 | return type; | |
16323 | ||
dc53a7ad JB |
16324 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16325 | if (attr != NULL) | |
16326 | bit_stride = DW_UNSND (attr) * 8; | |
16327 | ||
16328 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16329 | if (attr != NULL) | |
16330 | bit_stride = DW_UNSND (attr); | |
16331 | ||
c906108c SS |
16332 | /* Irix 6.2 native cc creates array types without children for |
16333 | arrays with unspecified length. */ | |
639d11d3 | 16334 | if (die->child == NULL) |
c906108c | 16335 | { |
46bf5051 | 16336 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16337 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
16338 | type = create_array_type_with_stride (NULL, element_type, range_type, |
16339 | bit_stride); | |
f792889a | 16340 | return set_die_type (die, type, cu); |
c906108c SS |
16341 | } |
16342 | ||
791afaa2 | 16343 | std::vector<struct type *> range_types; |
639d11d3 | 16344 | child_die = die->child; |
c906108c SS |
16345 | while (child_die && child_die->tag) |
16346 | { | |
16347 | if (child_die->tag == DW_TAG_subrange_type) | |
16348 | { | |
f792889a | 16349 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16350 | |
f792889a | 16351 | if (child_type != NULL) |
a02abb62 | 16352 | { |
0963b4bd MS |
16353 | /* The range type was succesfully read. Save it for the |
16354 | array type creation. */ | |
791afaa2 | 16355 | range_types.push_back (child_type); |
a02abb62 | 16356 | } |
c906108c SS |
16357 | } |
16358 | child_die = sibling_die (child_die); | |
16359 | } | |
16360 | ||
16361 | /* Dwarf2 dimensions are output from left to right, create the | |
16362 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16363 | |
c906108c | 16364 | type = element_type; |
7ca2d3a3 DL |
16365 | |
16366 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16367 | { | |
16368 | int i = 0; | |
9a619af0 | 16369 | |
791afaa2 | 16370 | while (i < range_types.size ()) |
dc53a7ad JB |
16371 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
16372 | bit_stride); | |
7ca2d3a3 DL |
16373 | } |
16374 | else | |
16375 | { | |
791afaa2 | 16376 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16377 | while (ndim-- > 0) |
dc53a7ad JB |
16378 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
16379 | bit_stride); | |
7ca2d3a3 | 16380 | } |
c906108c | 16381 | |
f5f8a009 EZ |
16382 | /* Understand Dwarf2 support for vector types (like they occur on |
16383 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16384 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16385 | custom vendor extension. The main difference between a regular | |
16386 | array and the vector variant is that vectors are passed by value | |
16387 | to functions. */ | |
e142c38c | 16388 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 16389 | if (attr) |
ea37ba09 | 16390 | make_vector_type (type); |
f5f8a009 | 16391 | |
dbc98a8b KW |
16392 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16393 | implementation may choose to implement triple vectors using this | |
16394 | attribute. */ | |
16395 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
16396 | if (attr) | |
16397 | { | |
16398 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
16399 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16400 | else | |
3e43a32a MS |
16401 | complaint (&symfile_complaints, |
16402 | _("DW_AT_byte_size for array type smaller " | |
16403 | "than the total size of elements")); | |
dbc98a8b KW |
16404 | } |
16405 | ||
39cbfefa DJ |
16406 | name = dwarf2_name (die, cu); |
16407 | if (name) | |
16408 | TYPE_NAME (type) = name; | |
6e70227d | 16409 | |
0963b4bd | 16410 | /* Install the type in the die. */ |
7e314c57 JK |
16411 | set_die_type (die, type, cu); |
16412 | ||
16413 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16414 | set_descriptive_type (type, die, cu); |
16415 | ||
7e314c57 | 16416 | return type; |
c906108c SS |
16417 | } |
16418 | ||
7ca2d3a3 | 16419 | static enum dwarf_array_dim_ordering |
6e70227d | 16420 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16421 | { |
16422 | struct attribute *attr; | |
16423 | ||
16424 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16425 | ||
aead7601 SM |
16426 | if (attr) |
16427 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 16428 | |
0963b4bd MS |
16429 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16430 | opposite order to the dwarf2 specification, but data is still | |
16431 | laid out as per normal fortran. | |
7ca2d3a3 | 16432 | |
0963b4bd MS |
16433 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16434 | version checking. */ | |
7ca2d3a3 | 16435 | |
905e0470 PM |
16436 | if (cu->language == language_fortran |
16437 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16438 | { |
16439 | return DW_ORD_row_major; | |
16440 | } | |
16441 | ||
6e70227d | 16442 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
16443 | { |
16444 | case array_column_major: | |
16445 | return DW_ORD_col_major; | |
16446 | case array_row_major: | |
16447 | default: | |
16448 | return DW_ORD_row_major; | |
16449 | }; | |
16450 | } | |
16451 | ||
72019c9c | 16452 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16453 | the DIE's type field. */ |
72019c9c | 16454 | |
f792889a | 16455 | static struct type * |
72019c9c GM |
16456 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16457 | { | |
7e314c57 JK |
16458 | struct type *domain_type, *set_type; |
16459 | struct attribute *attr; | |
f792889a | 16460 | |
7e314c57 JK |
16461 | domain_type = die_type (die, cu); |
16462 | ||
16463 | /* The die_type call above may have already set the type for this DIE. */ | |
16464 | set_type = get_die_type (die, cu); | |
16465 | if (set_type) | |
16466 | return set_type; | |
16467 | ||
16468 | set_type = create_set_type (NULL, domain_type); | |
16469 | ||
16470 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
16471 | if (attr) |
16472 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 16473 | |
f792889a | 16474 | return set_die_type (die, set_type, cu); |
72019c9c | 16475 | } |
7ca2d3a3 | 16476 | |
0971de02 TT |
16477 | /* A helper for read_common_block that creates a locexpr baton. |
16478 | SYM is the symbol which we are marking as computed. | |
16479 | COMMON_DIE is the DIE for the common block. | |
16480 | COMMON_LOC is the location expression attribute for the common | |
16481 | block itself. | |
16482 | MEMBER_LOC is the location expression attribute for the particular | |
16483 | member of the common block that we are processing. | |
16484 | CU is the CU from which the above come. */ | |
16485 | ||
16486 | static void | |
16487 | mark_common_block_symbol_computed (struct symbol *sym, | |
16488 | struct die_info *common_die, | |
16489 | struct attribute *common_loc, | |
16490 | struct attribute *member_loc, | |
16491 | struct dwarf2_cu *cu) | |
16492 | { | |
16493 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16494 | struct dwarf2_locexpr_baton *baton; | |
16495 | gdb_byte *ptr; | |
16496 | unsigned int cu_off; | |
16497 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
16498 | LONGEST offset = 0; | |
16499 | ||
16500 | gdb_assert (common_loc && member_loc); | |
16501 | gdb_assert (attr_form_is_block (common_loc)); | |
16502 | gdb_assert (attr_form_is_block (member_loc) | |
16503 | || attr_form_is_constant (member_loc)); | |
16504 | ||
8d749320 | 16505 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
16506 | baton->per_cu = cu->per_cu; |
16507 | gdb_assert (baton->per_cu); | |
16508 | ||
16509 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16510 | ||
16511 | if (attr_form_is_constant (member_loc)) | |
16512 | { | |
16513 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
16514 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
16515 | } | |
16516 | else | |
16517 | baton->size += DW_BLOCK (member_loc)->size; | |
16518 | ||
224c3ddb | 16519 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16520 | baton->data = ptr; |
16521 | ||
16522 | *ptr++ = DW_OP_call4; | |
9c541725 | 16523 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16524 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16525 | ptr += 4; | |
16526 | ||
16527 | if (attr_form_is_constant (member_loc)) | |
16528 | { | |
16529 | *ptr++ = DW_OP_addr; | |
16530 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16531 | ptr += cu->header.addr_size; | |
16532 | } | |
16533 | else | |
16534 | { | |
16535 | /* We have to copy the data here, because DW_OP_call4 will only | |
16536 | use a DW_AT_location attribute. */ | |
16537 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
16538 | ptr += DW_BLOCK (member_loc)->size; | |
16539 | } | |
16540 | ||
16541 | *ptr++ = DW_OP_plus; | |
16542 | gdb_assert (ptr - baton->data == baton->size); | |
16543 | ||
0971de02 | 16544 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16545 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16546 | } |
16547 | ||
4357ac6c TT |
16548 | /* Create appropriate locally-scoped variables for all the |
16549 | DW_TAG_common_block entries. Also create a struct common_block | |
16550 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
16551 | is used to sepate the common blocks name namespace from regular | |
16552 | variable names. */ | |
c906108c SS |
16553 | |
16554 | static void | |
e7c27a73 | 16555 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16556 | { |
0971de02 TT |
16557 | struct attribute *attr; |
16558 | ||
16559 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
16560 | if (attr) | |
16561 | { | |
16562 | /* Support the .debug_loc offsets. */ | |
16563 | if (attr_form_is_block (attr)) | |
16564 | { | |
16565 | /* Ok. */ | |
16566 | } | |
16567 | else if (attr_form_is_section_offset (attr)) | |
16568 | { | |
16569 | dwarf2_complex_location_expr_complaint (); | |
16570 | attr = NULL; | |
16571 | } | |
16572 | else | |
16573 | { | |
16574 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16575 | "common block member"); | |
16576 | attr = NULL; | |
16577 | } | |
16578 | } | |
16579 | ||
639d11d3 | 16580 | if (die->child != NULL) |
c906108c | 16581 | { |
4357ac6c TT |
16582 | struct objfile *objfile = cu->objfile; |
16583 | struct die_info *child_die; | |
16584 | size_t n_entries = 0, size; | |
16585 | struct common_block *common_block; | |
16586 | struct symbol *sym; | |
74ac6d43 | 16587 | |
4357ac6c TT |
16588 | for (child_die = die->child; |
16589 | child_die && child_die->tag; | |
16590 | child_die = sibling_die (child_die)) | |
16591 | ++n_entries; | |
16592 | ||
16593 | size = (sizeof (struct common_block) | |
16594 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16595 | common_block |
16596 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16597 | size); | |
4357ac6c TT |
16598 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16599 | common_block->n_entries = 0; | |
16600 | ||
16601 | for (child_die = die->child; | |
16602 | child_die && child_die->tag; | |
16603 | child_die = sibling_die (child_die)) | |
16604 | { | |
16605 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16606 | symbol scope. */ | |
e7c27a73 | 16607 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16608 | if (sym != NULL) |
16609 | { | |
16610 | struct attribute *member_loc; | |
16611 | ||
16612 | common_block->contents[common_block->n_entries++] = sym; | |
16613 | ||
16614 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16615 | cu); | |
16616 | if (member_loc) | |
16617 | { | |
16618 | /* GDB has handled this for a long time, but it is | |
16619 | not specified by DWARF. It seems to have been | |
16620 | emitted by gfortran at least as recently as: | |
16621 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
16622 | complaint (&symfile_complaints, | |
16623 | _("Variable in common block has " | |
16624 | "DW_AT_data_member_location " | |
16625 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16626 | to_underlying (child_die->sect_off), |
4262abfb | 16627 | objfile_name (cu->objfile)); |
0971de02 TT |
16628 | |
16629 | if (attr_form_is_section_offset (member_loc)) | |
16630 | dwarf2_complex_location_expr_complaint (); | |
16631 | else if (attr_form_is_constant (member_loc) | |
16632 | || attr_form_is_block (member_loc)) | |
16633 | { | |
16634 | if (attr) | |
16635 | mark_common_block_symbol_computed (sym, die, attr, | |
16636 | member_loc, cu); | |
16637 | } | |
16638 | else | |
16639 | dwarf2_complex_location_expr_complaint (); | |
16640 | } | |
16641 | } | |
c906108c | 16642 | } |
4357ac6c TT |
16643 | |
16644 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16645 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16646 | } |
16647 | } | |
16648 | ||
0114d602 | 16649 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16650 | |
0114d602 DJ |
16651 | static struct type * |
16652 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16653 | { |
e7c27a73 | 16654 | struct objfile *objfile = cu->objfile; |
0114d602 | 16655 | const char *previous_prefix, *name; |
9219021c | 16656 | int is_anonymous; |
0114d602 DJ |
16657 | struct type *type; |
16658 | ||
16659 | /* For extensions, reuse the type of the original namespace. */ | |
16660 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16661 | { | |
16662 | struct die_info *ext_die; | |
16663 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16664 | |
0114d602 DJ |
16665 | ext_die = dwarf2_extension (die, &ext_cu); |
16666 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16667 | |
16668 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16669 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16670 | return set_die_type (die, type, cu); |
16671 | } | |
9219021c | 16672 | |
e142c38c | 16673 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16674 | |
16675 | /* Now build the name of the current namespace. */ | |
16676 | ||
0114d602 DJ |
16677 | previous_prefix = determine_prefix (die, cu); |
16678 | if (previous_prefix[0] != '\0') | |
16679 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16680 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16681 | |
16682 | /* Create the type. */ | |
19f392bc | 16683 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
16684 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
16685 | ||
60531b24 | 16686 | return set_die_type (die, type, cu); |
0114d602 DJ |
16687 | } |
16688 | ||
22cee43f | 16689 | /* Read a namespace scope. */ |
0114d602 DJ |
16690 | |
16691 | static void | |
16692 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16693 | { | |
16694 | struct objfile *objfile = cu->objfile; | |
0114d602 | 16695 | int is_anonymous; |
9219021c | 16696 | |
5c4e30ca DC |
16697 | /* Add a symbol associated to this if we haven't seen the namespace |
16698 | before. Also, add a using directive if it's an anonymous | |
16699 | namespace. */ | |
9219021c | 16700 | |
f2f0e013 | 16701 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16702 | { |
16703 | struct type *type; | |
16704 | ||
0114d602 | 16705 | type = read_type_die (die, cu); |
e7c27a73 | 16706 | new_symbol (die, type, cu); |
5c4e30ca | 16707 | |
e8e80198 | 16708 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16709 | if (is_anonymous) |
0114d602 DJ |
16710 | { |
16711 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16712 | |
eb1e02fd | 16713 | std::vector<const char *> excludes; |
22cee43f PMR |
16714 | add_using_directive (using_directives (cu->language), |
16715 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 16716 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16717 | } |
5c4e30ca | 16718 | } |
9219021c | 16719 | |
639d11d3 | 16720 | if (die->child != NULL) |
d9fa45fe | 16721 | { |
639d11d3 | 16722 | struct die_info *child_die = die->child; |
6e70227d | 16723 | |
d9fa45fe DC |
16724 | while (child_die && child_die->tag) |
16725 | { | |
e7c27a73 | 16726 | process_die (child_die, cu); |
d9fa45fe DC |
16727 | child_die = sibling_die (child_die); |
16728 | } | |
16729 | } | |
38d518c9 EZ |
16730 | } |
16731 | ||
f55ee35c JK |
16732 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16733 | imported module. Still we need that type as local Fortran "use ... only" | |
16734 | declaration imports depend on the created type in determine_prefix. */ | |
16735 | ||
16736 | static struct type * | |
16737 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16738 | { | |
16739 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 16740 | const char *module_name; |
f55ee35c JK |
16741 | struct type *type; |
16742 | ||
16743 | module_name = dwarf2_name (die, cu); | |
16744 | if (!module_name) | |
3e43a32a MS |
16745 | complaint (&symfile_complaints, |
16746 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 16747 | to_underlying (die->sect_off)); |
19f392bc | 16748 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
16749 | |
16750 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
16751 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
16752 | ||
16753 | return set_die_type (die, type, cu); | |
16754 | } | |
16755 | ||
5d7cb8df JK |
16756 | /* Read a Fortran module. */ |
16757 | ||
16758 | static void | |
16759 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16760 | { | |
16761 | struct die_info *child_die = die->child; | |
530e8392 KB |
16762 | struct type *type; |
16763 | ||
16764 | type = read_type_die (die, cu); | |
16765 | new_symbol (die, type, cu); | |
5d7cb8df | 16766 | |
5d7cb8df JK |
16767 | while (child_die && child_die->tag) |
16768 | { | |
16769 | process_die (child_die, cu); | |
16770 | child_die = sibling_die (child_die); | |
16771 | } | |
16772 | } | |
16773 | ||
38d518c9 EZ |
16774 | /* Return the name of the namespace represented by DIE. Set |
16775 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16776 | namespace. */ | |
16777 | ||
16778 | static const char * | |
e142c38c | 16779 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16780 | { |
16781 | struct die_info *current_die; | |
16782 | const char *name = NULL; | |
16783 | ||
16784 | /* Loop through the extensions until we find a name. */ | |
16785 | ||
16786 | for (current_die = die; | |
16787 | current_die != NULL; | |
f2f0e013 | 16788 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16789 | { |
96553a0c DE |
16790 | /* We don't use dwarf2_name here so that we can detect the absence |
16791 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16792 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16793 | |
38d518c9 EZ |
16794 | if (name != NULL) |
16795 | break; | |
16796 | } | |
16797 | ||
16798 | /* Is it an anonymous namespace? */ | |
16799 | ||
16800 | *is_anonymous = (name == NULL); | |
16801 | if (*is_anonymous) | |
2b1dbab0 | 16802 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16803 | |
16804 | return name; | |
d9fa45fe DC |
16805 | } |
16806 | ||
c906108c SS |
16807 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16808 | the user defined type vector. */ | |
16809 | ||
f792889a | 16810 | static struct type * |
e7c27a73 | 16811 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16812 | { |
5e2b427d | 16813 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 16814 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 16815 | struct type *type; |
8b2dbe47 KB |
16816 | struct attribute *attr_byte_size; |
16817 | struct attribute *attr_address_class; | |
16818 | int byte_size, addr_class; | |
7e314c57 JK |
16819 | struct type *target_type; |
16820 | ||
16821 | target_type = die_type (die, cu); | |
c906108c | 16822 | |
7e314c57 JK |
16823 | /* The die_type call above may have already set the type for this DIE. */ |
16824 | type = get_die_type (die, cu); | |
16825 | if (type) | |
16826 | return type; | |
16827 | ||
16828 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 16829 | |
e142c38c | 16830 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
16831 | if (attr_byte_size) |
16832 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 16833 | else |
8b2dbe47 KB |
16834 | byte_size = cu_header->addr_size; |
16835 | ||
e142c38c | 16836 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
16837 | if (attr_address_class) |
16838 | addr_class = DW_UNSND (attr_address_class); | |
16839 | else | |
16840 | addr_class = DW_ADDR_none; | |
16841 | ||
16842 | /* If the pointer size or address class is different than the | |
16843 | default, create a type variant marked as such and set the | |
16844 | length accordingly. */ | |
16845 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 16846 | { |
5e2b427d | 16847 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
16848 | { |
16849 | int type_flags; | |
16850 | ||
849957d9 | 16851 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 16852 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
16853 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
16854 | == 0); | |
8b2dbe47 KB |
16855 | type = make_type_with_address_space (type, type_flags); |
16856 | } | |
16857 | else if (TYPE_LENGTH (type) != byte_size) | |
16858 | { | |
3e43a32a MS |
16859 | complaint (&symfile_complaints, |
16860 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 16861 | } |
6e70227d | 16862 | else |
9a619af0 MS |
16863 | { |
16864 | /* Should we also complain about unhandled address classes? */ | |
16865 | } | |
c906108c | 16866 | } |
8b2dbe47 KB |
16867 | |
16868 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 16869 | return set_die_type (die, type, cu); |
c906108c SS |
16870 | } |
16871 | ||
16872 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
16873 | the user defined type vector. */ | |
16874 | ||
f792889a | 16875 | static struct type * |
e7c27a73 | 16876 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
16877 | { |
16878 | struct type *type; | |
16879 | struct type *to_type; | |
16880 | struct type *domain; | |
16881 | ||
e7c27a73 DJ |
16882 | to_type = die_type (die, cu); |
16883 | domain = die_containing_type (die, cu); | |
0d5de010 | 16884 | |
7e314c57 JK |
16885 | /* The calls above may have already set the type for this DIE. */ |
16886 | type = get_die_type (die, cu); | |
16887 | if (type) | |
16888 | return type; | |
16889 | ||
0d5de010 DJ |
16890 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
16891 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
16892 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
16893 | { | |
16894 | struct type *new_type = alloc_type (cu->objfile); | |
16895 | ||
16896 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
16897 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
16898 | TYPE_VARARGS (to_type)); | |
16899 | type = lookup_methodptr_type (new_type); | |
16900 | } | |
0d5de010 DJ |
16901 | else |
16902 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 16903 | |
f792889a | 16904 | return set_die_type (die, type, cu); |
c906108c SS |
16905 | } |
16906 | ||
4297a3f0 | 16907 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
16908 | the user defined type vector. */ |
16909 | ||
f792889a | 16910 | static struct type * |
4297a3f0 AV |
16911 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
16912 | enum type_code refcode) | |
c906108c | 16913 | { |
e7c27a73 | 16914 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 16915 | struct type *type, *target_type; |
c906108c SS |
16916 | struct attribute *attr; |
16917 | ||
4297a3f0 AV |
16918 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
16919 | ||
7e314c57 JK |
16920 | target_type = die_type (die, cu); |
16921 | ||
16922 | /* The die_type call above may have already set the type for this DIE. */ | |
16923 | type = get_die_type (die, cu); | |
16924 | if (type) | |
16925 | return type; | |
16926 | ||
4297a3f0 | 16927 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 16928 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16929 | if (attr) |
16930 | { | |
16931 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16932 | } | |
16933 | else | |
16934 | { | |
107d2387 | 16935 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 16936 | } |
f792889a | 16937 | return set_die_type (die, type, cu); |
c906108c SS |
16938 | } |
16939 | ||
cf363f18 MW |
16940 | /* Add the given cv-qualifiers to the element type of the array. GCC |
16941 | outputs DWARF type qualifiers that apply to an array, not the | |
16942 | element type. But GDB relies on the array element type to carry | |
16943 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
16944 | specification. */ | |
16945 | ||
16946 | static struct type * | |
16947 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
16948 | struct type *base_type, int cnst, int voltl) | |
16949 | { | |
16950 | struct type *el_type, *inner_array; | |
16951 | ||
16952 | base_type = copy_type (base_type); | |
16953 | inner_array = base_type; | |
16954 | ||
16955 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
16956 | { | |
16957 | TYPE_TARGET_TYPE (inner_array) = | |
16958 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
16959 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
16960 | } | |
16961 | ||
16962 | el_type = TYPE_TARGET_TYPE (inner_array); | |
16963 | cnst |= TYPE_CONST (el_type); | |
16964 | voltl |= TYPE_VOLATILE (el_type); | |
16965 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
16966 | ||
16967 | return set_die_type (die, base_type, cu); | |
16968 | } | |
16969 | ||
f792889a | 16970 | static struct type * |
e7c27a73 | 16971 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16972 | { |
f792889a | 16973 | struct type *base_type, *cv_type; |
c906108c | 16974 | |
e7c27a73 | 16975 | base_type = die_type (die, cu); |
7e314c57 JK |
16976 | |
16977 | /* The die_type call above may have already set the type for this DIE. */ | |
16978 | cv_type = get_die_type (die, cu); | |
16979 | if (cv_type) | |
16980 | return cv_type; | |
16981 | ||
2f608a3a KW |
16982 | /* In case the const qualifier is applied to an array type, the element type |
16983 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
16984 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 16985 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 16986 | |
f792889a DJ |
16987 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
16988 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16989 | } |
16990 | ||
f792889a | 16991 | static struct type * |
e7c27a73 | 16992 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16993 | { |
f792889a | 16994 | struct type *base_type, *cv_type; |
c906108c | 16995 | |
e7c27a73 | 16996 | base_type = die_type (die, cu); |
7e314c57 JK |
16997 | |
16998 | /* The die_type call above may have already set the type for this DIE. */ | |
16999 | cv_type = get_die_type (die, cu); | |
17000 | if (cv_type) | |
17001 | return cv_type; | |
17002 | ||
cf363f18 MW |
17003 | /* In case the volatile qualifier is applied to an array type, the |
17004 | element type is so qualified, not the array type (section 6.7.3 | |
17005 | of C99). */ | |
17006 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
17007 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
17008 | ||
f792889a DJ |
17009 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
17010 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17011 | } |
17012 | ||
06d66ee9 TT |
17013 | /* Handle DW_TAG_restrict_type. */ |
17014 | ||
17015 | static struct type * | |
17016 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
17017 | { | |
17018 | struct type *base_type, *cv_type; | |
17019 | ||
17020 | base_type = die_type (die, cu); | |
17021 | ||
17022 | /* The die_type call above may have already set the type for this DIE. */ | |
17023 | cv_type = get_die_type (die, cu); | |
17024 | if (cv_type) | |
17025 | return cv_type; | |
17026 | ||
17027 | cv_type = make_restrict_type (base_type); | |
17028 | return set_die_type (die, cv_type, cu); | |
17029 | } | |
17030 | ||
a2c2acaf MW |
17031 | /* Handle DW_TAG_atomic_type. */ |
17032 | ||
17033 | static struct type * | |
17034 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
17035 | { | |
17036 | struct type *base_type, *cv_type; | |
17037 | ||
17038 | base_type = die_type (die, cu); | |
17039 | ||
17040 | /* The die_type call above may have already set the type for this DIE. */ | |
17041 | cv_type = get_die_type (die, cu); | |
17042 | if (cv_type) | |
17043 | return cv_type; | |
17044 | ||
17045 | cv_type = make_atomic_type (base_type); | |
17046 | return set_die_type (die, cv_type, cu); | |
17047 | } | |
17048 | ||
c906108c SS |
17049 | /* Extract all information from a DW_TAG_string_type DIE and add to |
17050 | the user defined type vector. It isn't really a user defined type, | |
17051 | but it behaves like one, with other DIE's using an AT_user_def_type | |
17052 | attribute to reference it. */ | |
17053 | ||
f792889a | 17054 | static struct type * |
e7c27a73 | 17055 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17056 | { |
e7c27a73 | 17057 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 17058 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
17059 | struct type *type, *range_type, *index_type, *char_type; |
17060 | struct attribute *attr; | |
17061 | unsigned int length; | |
17062 | ||
e142c38c | 17063 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
17064 | if (attr) |
17065 | { | |
17066 | length = DW_UNSND (attr); | |
17067 | } | |
17068 | else | |
17069 | { | |
0963b4bd | 17070 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 17071 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
17072 | if (attr) |
17073 | { | |
17074 | length = DW_UNSND (attr); | |
17075 | } | |
17076 | else | |
17077 | { | |
17078 | length = 1; | |
17079 | } | |
c906108c | 17080 | } |
6ccb9162 | 17081 | |
46bf5051 | 17082 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 17083 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
17084 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
17085 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 17086 | |
f792889a | 17087 | return set_die_type (die, type, cu); |
c906108c SS |
17088 | } |
17089 | ||
4d804846 JB |
17090 | /* Assuming that DIE corresponds to a function, returns nonzero |
17091 | if the function is prototyped. */ | |
17092 | ||
17093 | static int | |
17094 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
17095 | { | |
17096 | struct attribute *attr; | |
17097 | ||
17098 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
17099 | if (attr && (DW_UNSND (attr) != 0)) | |
17100 | return 1; | |
17101 | ||
17102 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
17103 | is only meaninful for C, but the concept also extends to other | |
17104 | languages that allow unprototyped functions (Eg: Objective C). | |
17105 | For all other languages, assume that functions are always | |
17106 | prototyped. */ | |
17107 | if (cu->language != language_c | |
17108 | && cu->language != language_objc | |
17109 | && cu->language != language_opencl) | |
17110 | return 1; | |
17111 | ||
17112 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
17113 | prototyped and unprototyped functions; default to prototyped, | |
17114 | since that is more common in modern code (and RealView warns | |
17115 | about unprototyped functions). */ | |
17116 | if (producer_is_realview (cu->producer)) | |
17117 | return 1; | |
17118 | ||
17119 | return 0; | |
17120 | } | |
17121 | ||
c906108c SS |
17122 | /* Handle DIES due to C code like: |
17123 | ||
17124 | struct foo | |
c5aa993b JM |
17125 | { |
17126 | int (*funcp)(int a, long l); | |
17127 | int b; | |
17128 | }; | |
c906108c | 17129 | |
0963b4bd | 17130 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 17131 | |
f792889a | 17132 | static struct type * |
e7c27a73 | 17133 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17134 | { |
bb5ed363 | 17135 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
17136 | struct type *type; /* Type that this function returns. */ |
17137 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
17138 | struct attribute *attr; |
17139 | ||
e7c27a73 | 17140 | type = die_type (die, cu); |
7e314c57 JK |
17141 | |
17142 | /* The die_type call above may have already set the type for this DIE. */ | |
17143 | ftype = get_die_type (die, cu); | |
17144 | if (ftype) | |
17145 | return ftype; | |
17146 | ||
0c8b41f1 | 17147 | ftype = lookup_function_type (type); |
c906108c | 17148 | |
4d804846 | 17149 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 17150 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 17151 | |
c055b101 CV |
17152 | /* Store the calling convention in the type if it's available in |
17153 | the subroutine die. Otherwise set the calling convention to | |
17154 | the default value DW_CC_normal. */ | |
17155 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
17156 | if (attr) |
17157 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
17158 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
17159 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17160 | else | |
17161 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17162 | |
743649fd MW |
17163 | /* Record whether the function returns normally to its caller or not |
17164 | if the DWARF producer set that information. */ | |
17165 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
17166 | if (attr && (DW_UNSND (attr) != 0)) | |
17167 | TYPE_NO_RETURN (ftype) = 1; | |
17168 | ||
76c10ea2 GM |
17169 | /* We need to add the subroutine type to the die immediately so |
17170 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17171 | declared as the same subroutine type. */ |
76c10ea2 | 17172 | set_die_type (die, ftype, cu); |
6e70227d | 17173 | |
639d11d3 | 17174 | if (die->child != NULL) |
c906108c | 17175 | { |
bb5ed363 | 17176 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17177 | struct die_info *child_die; |
8072405b | 17178 | int nparams, iparams; |
c906108c SS |
17179 | |
17180 | /* Count the number of parameters. | |
17181 | FIXME: GDB currently ignores vararg functions, but knows about | |
17182 | vararg member functions. */ | |
8072405b | 17183 | nparams = 0; |
639d11d3 | 17184 | child_die = die->child; |
c906108c SS |
17185 | while (child_die && child_die->tag) |
17186 | { | |
17187 | if (child_die->tag == DW_TAG_formal_parameter) | |
17188 | nparams++; | |
17189 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 17190 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
17191 | child_die = sibling_die (child_die); |
17192 | } | |
17193 | ||
17194 | /* Allocate storage for parameters and fill them in. */ | |
17195 | TYPE_NFIELDS (ftype) = nparams; | |
17196 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 17197 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 17198 | |
8072405b JK |
17199 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17200 | even if we error out during the parameters reading below. */ | |
17201 | for (iparams = 0; iparams < nparams; iparams++) | |
17202 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
17203 | ||
17204 | iparams = 0; | |
639d11d3 | 17205 | child_die = die->child; |
c906108c SS |
17206 | while (child_die && child_die->tag) |
17207 | { | |
17208 | if (child_die->tag == DW_TAG_formal_parameter) | |
17209 | { | |
3ce3b1ba PA |
17210 | struct type *arg_type; |
17211 | ||
17212 | /* DWARF version 2 has no clean way to discern C++ | |
17213 | static and non-static member functions. G++ helps | |
17214 | GDB by marking the first parameter for non-static | |
17215 | member functions (which is the this pointer) as | |
17216 | artificial. We pass this information to | |
17217 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17218 | ||
17219 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17220 | 4.5 does not yet generate. */ | |
e142c38c | 17221 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
17222 | if (attr) |
17223 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
17224 | else | |
9c37b5ae | 17225 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17226 | arg_type = die_type (child_die, cu); |
17227 | ||
17228 | /* RealView does not mark THIS as const, which the testsuite | |
17229 | expects. GCC marks THIS as const in method definitions, | |
17230 | but not in the class specifications (GCC PR 43053). */ | |
17231 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17232 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17233 | { | |
17234 | int is_this = 0; | |
17235 | struct dwarf2_cu *arg_cu = cu; | |
17236 | const char *name = dwarf2_name (child_die, cu); | |
17237 | ||
17238 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
17239 | if (attr) | |
17240 | { | |
17241 | /* If the compiler emits this, use it. */ | |
17242 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17243 | is_this = 1; | |
17244 | } | |
17245 | else if (name && strcmp (name, "this") == 0) | |
17246 | /* Function definitions will have the argument names. */ | |
17247 | is_this = 1; | |
17248 | else if (name == NULL && iparams == 0) | |
17249 | /* Declarations may not have the names, so like | |
17250 | elsewhere in GDB, assume an artificial first | |
17251 | argument is "this". */ | |
17252 | is_this = 1; | |
17253 | ||
17254 | if (is_this) | |
17255 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17256 | arg_type, 0); | |
17257 | } | |
17258 | ||
17259 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
17260 | iparams++; |
17261 | } | |
17262 | child_die = sibling_die (child_die); | |
17263 | } | |
17264 | } | |
17265 | ||
76c10ea2 | 17266 | return ftype; |
c906108c SS |
17267 | } |
17268 | ||
f792889a | 17269 | static struct type * |
e7c27a73 | 17270 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17271 | { |
e7c27a73 | 17272 | struct objfile *objfile = cu->objfile; |
0114d602 | 17273 | const char *name = NULL; |
3c8e0968 | 17274 | struct type *this_type, *target_type; |
c906108c | 17275 | |
94af9270 | 17276 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
17277 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
17278 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 17279 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17280 | target_type = die_type (die, cu); |
17281 | if (target_type != this_type) | |
17282 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17283 | else | |
17284 | { | |
17285 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17286 | spec and cause infinite loops in GDB. */ | |
17287 | complaint (&symfile_complaints, | |
17288 | _("Self-referential DW_TAG_typedef " | |
17289 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 17290 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
17291 | TYPE_TARGET_TYPE (this_type) = NULL; |
17292 | } | |
f792889a | 17293 | return this_type; |
c906108c SS |
17294 | } |
17295 | ||
9b790ce7 UW |
17296 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17297 | (which may be different from NAME) to the architecture back-end to allow | |
17298 | it to guess the correct format if necessary. */ | |
17299 | ||
17300 | static struct type * | |
17301 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
17302 | const char *name_hint) | |
17303 | { | |
17304 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
17305 | const struct floatformat **format; | |
17306 | struct type *type; | |
17307 | ||
17308 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17309 | if (format) | |
17310 | type = init_float_type (objfile, bits, name, format); | |
17311 | else | |
77b7c781 | 17312 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17313 | |
17314 | return type; | |
17315 | } | |
17316 | ||
c906108c SS |
17317 | /* Find a representation of a given base type and install |
17318 | it in the TYPE field of the die. */ | |
17319 | ||
f792889a | 17320 | static struct type * |
e7c27a73 | 17321 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17322 | { |
e7c27a73 | 17323 | struct objfile *objfile = cu->objfile; |
c906108c SS |
17324 | struct type *type; |
17325 | struct attribute *attr; | |
19f392bc | 17326 | int encoding = 0, bits = 0; |
15d034d0 | 17327 | const char *name; |
c906108c | 17328 | |
e142c38c | 17329 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
17330 | if (attr) |
17331 | { | |
17332 | encoding = DW_UNSND (attr); | |
17333 | } | |
e142c38c | 17334 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
17335 | if (attr) |
17336 | { | |
19f392bc | 17337 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 17338 | } |
39cbfefa | 17339 | name = dwarf2_name (die, cu); |
6ccb9162 | 17340 | if (!name) |
c906108c | 17341 | { |
6ccb9162 UW |
17342 | complaint (&symfile_complaints, |
17343 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 17344 | } |
6ccb9162 UW |
17345 | |
17346 | switch (encoding) | |
c906108c | 17347 | { |
6ccb9162 UW |
17348 | case DW_ATE_address: |
17349 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 17350 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 17351 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
17352 | break; |
17353 | case DW_ATE_boolean: | |
19f392bc | 17354 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
17355 | break; |
17356 | case DW_ATE_complex_float: | |
9b790ce7 | 17357 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 17358 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
17359 | break; |
17360 | case DW_ATE_decimal_float: | |
19f392bc | 17361 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
17362 | break; |
17363 | case DW_ATE_float: | |
9b790ce7 | 17364 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
17365 | break; |
17366 | case DW_ATE_signed: | |
19f392bc | 17367 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
17368 | break; |
17369 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17370 | if (cu->language == language_fortran |
17371 | && name | |
61012eef | 17372 | && startswith (name, "character(")) |
19f392bc UW |
17373 | type = init_character_type (objfile, bits, 1, name); |
17374 | else | |
17375 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
17376 | break; |
17377 | case DW_ATE_signed_char: | |
6e70227d | 17378 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17379 | || cu->language == language_pascal |
17380 | || cu->language == language_fortran) | |
19f392bc UW |
17381 | type = init_character_type (objfile, bits, 0, name); |
17382 | else | |
17383 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
17384 | break; |
17385 | case DW_ATE_unsigned_char: | |
868a0084 | 17386 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17387 | || cu->language == language_pascal |
c44af4eb TT |
17388 | || cu->language == language_fortran |
17389 | || cu->language == language_rust) | |
19f392bc UW |
17390 | type = init_character_type (objfile, bits, 1, name); |
17391 | else | |
17392 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 17393 | break; |
75079b2b | 17394 | case DW_ATE_UTF: |
53e710ac PA |
17395 | { |
17396 | gdbarch *arch = get_objfile_arch (objfile); | |
17397 | ||
17398 | if (bits == 16) | |
17399 | type = builtin_type (arch)->builtin_char16; | |
17400 | else if (bits == 32) | |
17401 | type = builtin_type (arch)->builtin_char32; | |
17402 | else | |
17403 | { | |
17404 | complaint (&symfile_complaints, | |
17405 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
17406 | bits); | |
17407 | type = init_integer_type (objfile, bits, 1, name); | |
17408 | } | |
17409 | return set_die_type (die, type, cu); | |
17410 | } | |
75079b2b TT |
17411 | break; |
17412 | ||
6ccb9162 UW |
17413 | default: |
17414 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
17415 | dwarf_type_encoding_name (encoding)); | |
77b7c781 | 17416 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17417 | break; |
c906108c | 17418 | } |
6ccb9162 | 17419 | |
0114d602 | 17420 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17421 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17422 | |
f792889a | 17423 | return set_die_type (die, type, cu); |
c906108c SS |
17424 | } |
17425 | ||
80180f79 SA |
17426 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17427 | resulting value of the attribute into struct bound_prop. | |
17428 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17429 | ||
17430 | static int | |
17431 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
17432 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
17433 | { | |
17434 | struct dwarf2_property_baton *baton; | |
17435 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
17436 | ||
17437 | if (attr == NULL || prop == NULL) | |
17438 | return 0; | |
17439 | ||
17440 | if (attr_form_is_block (attr)) | |
17441 | { | |
8d749320 | 17442 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
17443 | baton->referenced_type = NULL; |
17444 | baton->locexpr.per_cu = cu->per_cu; | |
17445 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17446 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
17447 | prop->data.baton = baton; | |
17448 | prop->kind = PROP_LOCEXPR; | |
17449 | gdb_assert (prop->data.baton != NULL); | |
17450 | } | |
17451 | else if (attr_form_is_ref (attr)) | |
17452 | { | |
17453 | struct dwarf2_cu *target_cu = cu; | |
17454 | struct die_info *target_die; | |
17455 | struct attribute *target_attr; | |
17456 | ||
17457 | target_die = follow_die_ref (die, attr, &target_cu); | |
17458 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17459 | if (target_attr == NULL) |
17460 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17461 | target_cu); | |
80180f79 SA |
17462 | if (target_attr == NULL) |
17463 | return 0; | |
17464 | ||
df25ebbd | 17465 | switch (target_attr->name) |
80180f79 | 17466 | { |
df25ebbd JB |
17467 | case DW_AT_location: |
17468 | if (attr_form_is_section_offset (target_attr)) | |
17469 | { | |
8d749320 | 17470 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
17471 | baton->referenced_type = die_type (target_die, target_cu); |
17472 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
17473 | prop->data.baton = baton; | |
17474 | prop->kind = PROP_LOCLIST; | |
17475 | gdb_assert (prop->data.baton != NULL); | |
17476 | } | |
17477 | else if (attr_form_is_block (target_attr)) | |
17478 | { | |
8d749320 | 17479 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
17480 | baton->referenced_type = die_type (target_die, target_cu); |
17481 | baton->locexpr.per_cu = cu->per_cu; | |
17482 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17483 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
17484 | prop->data.baton = baton; | |
17485 | prop->kind = PROP_LOCEXPR; | |
17486 | gdb_assert (prop->data.baton != NULL); | |
17487 | } | |
17488 | else | |
17489 | { | |
17490 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17491 | "dynamic property"); | |
17492 | return 0; | |
17493 | } | |
17494 | break; | |
17495 | case DW_AT_data_member_location: | |
17496 | { | |
17497 | LONGEST offset; | |
17498 | ||
17499 | if (!handle_data_member_location (target_die, target_cu, | |
17500 | &offset)) | |
17501 | return 0; | |
17502 | ||
8d749320 | 17503 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
17504 | baton->referenced_type = read_type_die (target_die->parent, |
17505 | target_cu); | |
df25ebbd JB |
17506 | baton->offset_info.offset = offset; |
17507 | baton->offset_info.type = die_type (target_die, target_cu); | |
17508 | prop->data.baton = baton; | |
17509 | prop->kind = PROP_ADDR_OFFSET; | |
17510 | break; | |
17511 | } | |
80180f79 SA |
17512 | } |
17513 | } | |
17514 | else if (attr_form_is_constant (attr)) | |
17515 | { | |
17516 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
17517 | prop->kind = PROP_CONST; | |
17518 | } | |
17519 | else | |
17520 | { | |
17521 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17522 | dwarf2_name (die, cu)); | |
17523 | return 0; | |
17524 | } | |
17525 | ||
17526 | return 1; | |
17527 | } | |
17528 | ||
a02abb62 JB |
17529 | /* Read the given DW_AT_subrange DIE. */ |
17530 | ||
f792889a | 17531 | static struct type * |
a02abb62 JB |
17532 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17533 | { | |
4c9ad8c2 | 17534 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17535 | struct type *range_type; |
17536 | struct attribute *attr; | |
729efb13 | 17537 | struct dynamic_prop low, high; |
4fae6e18 | 17538 | int low_default_is_valid; |
c451ebe5 | 17539 | int high_bound_is_count = 0; |
15d034d0 | 17540 | const char *name; |
43bbcdc2 | 17541 | LONGEST negative_mask; |
e77813c8 | 17542 | |
4c9ad8c2 TT |
17543 | orig_base_type = die_type (die, cu); |
17544 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
17545 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17546 | creating the range type, but we use the result of check_typedef | |
17547 | when examining properties of the type. */ | |
17548 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17549 | |
7e314c57 JK |
17550 | /* The die_type call above may have already set the type for this DIE. */ |
17551 | range_type = get_die_type (die, cu); | |
17552 | if (range_type) | |
17553 | return range_type; | |
17554 | ||
729efb13 SA |
17555 | low.kind = PROP_CONST; |
17556 | high.kind = PROP_CONST; | |
17557 | high.data.const_val = 0; | |
17558 | ||
4fae6e18 JK |
17559 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17560 | omitting DW_AT_lower_bound. */ | |
17561 | switch (cu->language) | |
6e70227d | 17562 | { |
4fae6e18 JK |
17563 | case language_c: |
17564 | case language_cplus: | |
729efb13 | 17565 | low.data.const_val = 0; |
4fae6e18 JK |
17566 | low_default_is_valid = 1; |
17567 | break; | |
17568 | case language_fortran: | |
729efb13 | 17569 | low.data.const_val = 1; |
4fae6e18 JK |
17570 | low_default_is_valid = 1; |
17571 | break; | |
17572 | case language_d: | |
4fae6e18 | 17573 | case language_objc: |
c44af4eb | 17574 | case language_rust: |
729efb13 | 17575 | low.data.const_val = 0; |
4fae6e18 JK |
17576 | low_default_is_valid = (cu->header.version >= 4); |
17577 | break; | |
17578 | case language_ada: | |
17579 | case language_m2: | |
17580 | case language_pascal: | |
729efb13 | 17581 | low.data.const_val = 1; |
4fae6e18 JK |
17582 | low_default_is_valid = (cu->header.version >= 4); |
17583 | break; | |
17584 | default: | |
729efb13 | 17585 | low.data.const_val = 0; |
4fae6e18 JK |
17586 | low_default_is_valid = 0; |
17587 | break; | |
a02abb62 JB |
17588 | } |
17589 | ||
e142c38c | 17590 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 17591 | if (attr) |
11c1ba78 | 17592 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
17593 | else if (!low_default_is_valid) |
17594 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
17595 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 17596 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 17597 | |
e142c38c | 17598 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 17599 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
17600 | { |
17601 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 17602 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 17603 | { |
c451ebe5 SA |
17604 | /* If bounds are constant do the final calculation here. */ |
17605 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17606 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17607 | else | |
17608 | high_bound_is_count = 1; | |
c2ff108b | 17609 | } |
e77813c8 PM |
17610 | } |
17611 | ||
17612 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17613 | without specifying a base type. | |
17614 | In that case, the base type must be set to the type of | |
17615 | the lower bound, upper bound or count, in that order, if any of these | |
17616 | three attributes references an object that has a type. | |
17617 | If no base type is found, the Dwarf-2 specifications say that | |
17618 | a signed integer type of size equal to the size of an address should | |
17619 | be used. | |
17620 | For the following C code: `extern char gdb_int [];' | |
17621 | GCC produces an empty range DIE. | |
17622 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 17623 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
17624 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
17625 | { | |
17626 | struct objfile *objfile = cu->objfile; | |
17627 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
17628 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
17629 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
17630 | ||
17631 | /* Test "int", "long int", and "long long int" objfile types, | |
17632 | and select the first one having a size above or equal to the | |
17633 | architecture address size. */ | |
17634 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
17635 | base_type = int_type; | |
17636 | else | |
17637 | { | |
17638 | int_type = objfile_type (objfile)->builtin_long; | |
17639 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
17640 | base_type = int_type; | |
17641 | else | |
17642 | { | |
17643 | int_type = objfile_type (objfile)->builtin_long_long; | |
17644 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
17645 | base_type = int_type; | |
17646 | } | |
17647 | } | |
17648 | } | |
a02abb62 | 17649 | |
dbb9c2b1 JB |
17650 | /* Normally, the DWARF producers are expected to use a signed |
17651 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
17652 | But this is unfortunately not always the case, as witnessed | |
17653 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
17654 | is used instead. To work around that ambiguity, we treat | |
17655 | the bounds as signed, and thus sign-extend their values, when | |
17656 | the base type is signed. */ | |
6e70227d | 17657 | negative_mask = |
66c6502d | 17658 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
17659 | if (low.kind == PROP_CONST |
17660 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
17661 | low.data.const_val |= negative_mask; | |
17662 | if (high.kind == PROP_CONST | |
17663 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
17664 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 17665 | |
729efb13 | 17666 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 17667 | |
c451ebe5 SA |
17668 | if (high_bound_is_count) |
17669 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
17670 | ||
c2ff108b JK |
17671 | /* Ada expects an empty array on no boundary attributes. */ |
17672 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 17673 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 17674 | |
39cbfefa DJ |
17675 | name = dwarf2_name (die, cu); |
17676 | if (name) | |
17677 | TYPE_NAME (range_type) = name; | |
6e70227d | 17678 | |
e142c38c | 17679 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
17680 | if (attr) |
17681 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
17682 | ||
7e314c57 JK |
17683 | set_die_type (die, range_type, cu); |
17684 | ||
17685 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
17686 | set_descriptive_type (range_type, die, cu); |
17687 | ||
7e314c57 | 17688 | return range_type; |
a02abb62 | 17689 | } |
6e70227d | 17690 | |
f792889a | 17691 | static struct type * |
81a17f79 JB |
17692 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
17693 | { | |
17694 | struct type *type; | |
81a17f79 | 17695 | |
81a17f79 JB |
17696 | /* For now, we only support the C meaning of an unspecified type: void. */ |
17697 | ||
19f392bc | 17698 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 17699 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 17700 | |
f792889a | 17701 | return set_die_type (die, type, cu); |
81a17f79 | 17702 | } |
a02abb62 | 17703 | |
639d11d3 DC |
17704 | /* Read a single die and all its descendents. Set the die's sibling |
17705 | field to NULL; set other fields in the die correctly, and set all | |
17706 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
17707 | location of the info_ptr after reading all of those dies. PARENT | |
17708 | is the parent of the die in question. */ | |
17709 | ||
17710 | static struct die_info * | |
dee91e82 | 17711 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
17712 | const gdb_byte *info_ptr, |
17713 | const gdb_byte **new_info_ptr, | |
dee91e82 | 17714 | struct die_info *parent) |
639d11d3 DC |
17715 | { |
17716 | struct die_info *die; | |
d521ce57 | 17717 | const gdb_byte *cur_ptr; |
639d11d3 DC |
17718 | int has_children; |
17719 | ||
bf6af496 | 17720 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
17721 | if (die == NULL) |
17722 | { | |
17723 | *new_info_ptr = cur_ptr; | |
17724 | return NULL; | |
17725 | } | |
93311388 | 17726 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
17727 | |
17728 | if (has_children) | |
bf6af496 | 17729 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
17730 | else |
17731 | { | |
17732 | die->child = NULL; | |
17733 | *new_info_ptr = cur_ptr; | |
17734 | } | |
17735 | ||
17736 | die->sibling = NULL; | |
17737 | die->parent = parent; | |
17738 | return die; | |
17739 | } | |
17740 | ||
17741 | /* Read a die, all of its descendents, and all of its siblings; set | |
17742 | all of the fields of all of the dies correctly. Arguments are as | |
17743 | in read_die_and_children. */ | |
17744 | ||
17745 | static struct die_info * | |
bf6af496 | 17746 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
17747 | const gdb_byte *info_ptr, |
17748 | const gdb_byte **new_info_ptr, | |
bf6af496 | 17749 | struct die_info *parent) |
639d11d3 DC |
17750 | { |
17751 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 17752 | const gdb_byte *cur_ptr; |
639d11d3 | 17753 | |
c906108c | 17754 | cur_ptr = info_ptr; |
639d11d3 DC |
17755 | first_die = last_sibling = NULL; |
17756 | ||
17757 | while (1) | |
c906108c | 17758 | { |
639d11d3 | 17759 | struct die_info *die |
dee91e82 | 17760 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 17761 | |
1d325ec1 | 17762 | if (die == NULL) |
c906108c | 17763 | { |
639d11d3 DC |
17764 | *new_info_ptr = cur_ptr; |
17765 | return first_die; | |
c906108c | 17766 | } |
1d325ec1 DJ |
17767 | |
17768 | if (!first_die) | |
17769 | first_die = die; | |
c906108c | 17770 | else |
1d325ec1 DJ |
17771 | last_sibling->sibling = die; |
17772 | ||
17773 | last_sibling = die; | |
c906108c | 17774 | } |
c906108c SS |
17775 | } |
17776 | ||
bf6af496 DE |
17777 | /* Read a die, all of its descendents, and all of its siblings; set |
17778 | all of the fields of all of the dies correctly. Arguments are as | |
17779 | in read_die_and_children. | |
17780 | This the main entry point for reading a DIE and all its children. */ | |
17781 | ||
17782 | static struct die_info * | |
17783 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
17784 | const gdb_byte *info_ptr, |
17785 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
17786 | struct die_info *parent) |
17787 | { | |
17788 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
17789 | new_info_ptr, parent); | |
17790 | ||
b4f54984 | 17791 | if (dwarf_die_debug) |
bf6af496 DE |
17792 | { |
17793 | fprintf_unfiltered (gdb_stdlog, | |
17794 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 17795 | get_section_name (reader->die_section), |
bf6af496 DE |
17796 | (unsigned) (info_ptr - reader->die_section->buffer), |
17797 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17798 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
17799 | } |
17800 | ||
17801 | return die; | |
17802 | } | |
17803 | ||
3019eac3 DE |
17804 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
17805 | attributes. | |
17806 | The caller is responsible for filling in the extra attributes | |
17807 | and updating (*DIEP)->num_attrs. | |
17808 | Set DIEP to point to a newly allocated die with its information, | |
17809 | except for its child, sibling, and parent fields. | |
17810 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 17811 | |
d521ce57 | 17812 | static const gdb_byte * |
3019eac3 | 17813 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 17814 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 17815 | int *has_children, int num_extra_attrs) |
93311388 | 17816 | { |
b64f50a1 | 17817 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
17818 | struct abbrev_info *abbrev; |
17819 | struct die_info *die; | |
17820 | struct dwarf2_cu *cu = reader->cu; | |
17821 | bfd *abfd = reader->abfd; | |
17822 | ||
9c541725 | 17823 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
17824 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17825 | info_ptr += bytes_read; | |
17826 | if (!abbrev_number) | |
17827 | { | |
17828 | *diep = NULL; | |
17829 | *has_children = 0; | |
17830 | return info_ptr; | |
17831 | } | |
17832 | ||
433df2d4 | 17833 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 17834 | if (!abbrev) |
348e048f DE |
17835 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
17836 | abbrev_number, | |
17837 | bfd_get_filename (abfd)); | |
17838 | ||
3019eac3 | 17839 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 17840 | die->sect_off = sect_off; |
93311388 DE |
17841 | die->tag = abbrev->tag; |
17842 | die->abbrev = abbrev_number; | |
17843 | ||
3019eac3 DE |
17844 | /* Make the result usable. |
17845 | The caller needs to update num_attrs after adding the extra | |
17846 | attributes. */ | |
93311388 DE |
17847 | die->num_attrs = abbrev->num_attrs; |
17848 | ||
17849 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
17850 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
17851 | info_ptr); | |
93311388 DE |
17852 | |
17853 | *diep = die; | |
17854 | *has_children = abbrev->has_children; | |
17855 | return info_ptr; | |
17856 | } | |
17857 | ||
3019eac3 DE |
17858 | /* Read a die and all its attributes. |
17859 | Set DIEP to point to a newly allocated die with its information, | |
17860 | except for its child, sibling, and parent fields. | |
17861 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
17862 | ||
d521ce57 | 17863 | static const gdb_byte * |
3019eac3 | 17864 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 17865 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
17866 | int *has_children) |
17867 | { | |
d521ce57 | 17868 | const gdb_byte *result; |
bf6af496 DE |
17869 | |
17870 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
17871 | ||
b4f54984 | 17872 | if (dwarf_die_debug) |
bf6af496 DE |
17873 | { |
17874 | fprintf_unfiltered (gdb_stdlog, | |
17875 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 17876 | get_section_name (reader->die_section), |
bf6af496 DE |
17877 | (unsigned) (info_ptr - reader->die_section->buffer), |
17878 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17879 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
17880 | } |
17881 | ||
17882 | return result; | |
3019eac3 | 17883 | } |
433df2d4 DE |
17884 | \f |
17885 | /* Abbreviation tables. | |
3019eac3 | 17886 | |
433df2d4 | 17887 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
17888 | stored in a separate .debug_abbrev section. Before we read any |
17889 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
17890 | in a hash table. */ |
17891 | ||
17892 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
17893 | ||
17894 | static struct abbrev_info * | |
17895 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
17896 | { | |
17897 | struct abbrev_info *abbrev; | |
17898 | ||
8d749320 | 17899 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 17900 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 17901 | |
433df2d4 DE |
17902 | return abbrev; |
17903 | } | |
17904 | ||
17905 | /* Add an abbreviation to the table. */ | |
c906108c SS |
17906 | |
17907 | static void | |
433df2d4 DE |
17908 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
17909 | unsigned int abbrev_number, | |
17910 | struct abbrev_info *abbrev) | |
17911 | { | |
17912 | unsigned int hash_number; | |
17913 | ||
17914 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
17915 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
17916 | abbrev_table->abbrevs[hash_number] = abbrev; | |
17917 | } | |
dee91e82 | 17918 | |
433df2d4 DE |
17919 | /* Look up an abbrev in the table. |
17920 | Returns NULL if the abbrev is not found. */ | |
17921 | ||
17922 | static struct abbrev_info * | |
17923 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
17924 | unsigned int abbrev_number) | |
c906108c | 17925 | { |
433df2d4 DE |
17926 | unsigned int hash_number; |
17927 | struct abbrev_info *abbrev; | |
17928 | ||
17929 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
17930 | abbrev = abbrev_table->abbrevs[hash_number]; | |
17931 | ||
17932 | while (abbrev) | |
17933 | { | |
17934 | if (abbrev->number == abbrev_number) | |
17935 | return abbrev; | |
17936 | abbrev = abbrev->next; | |
17937 | } | |
17938 | return NULL; | |
17939 | } | |
17940 | ||
17941 | /* Read in an abbrev table. */ | |
17942 | ||
17943 | static struct abbrev_table * | |
17944 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 17945 | sect_offset sect_off) |
433df2d4 DE |
17946 | { |
17947 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 17948 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 17949 | struct abbrev_table *abbrev_table; |
d521ce57 | 17950 | const gdb_byte *abbrev_ptr; |
c906108c SS |
17951 | struct abbrev_info *cur_abbrev; |
17952 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 17953 | unsigned int abbrev_form; |
f3dd6933 DJ |
17954 | struct attr_abbrev *cur_attrs; |
17955 | unsigned int allocated_attrs; | |
c906108c | 17956 | |
70ba0933 | 17957 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 17958 | abbrev_table->sect_off = sect_off; |
433df2d4 | 17959 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
17960 | abbrev_table->abbrevs = |
17961 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
17962 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
17963 | memset (abbrev_table->abbrevs, 0, |
17964 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 17965 | |
433df2d4 | 17966 | dwarf2_read_section (objfile, section); |
9c541725 | 17967 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
17968 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
17969 | abbrev_ptr += bytes_read; | |
17970 | ||
f3dd6933 | 17971 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 17972 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 17973 | |
0963b4bd | 17974 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
17975 | while (abbrev_number) |
17976 | { | |
433df2d4 | 17977 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
17978 | |
17979 | /* read in abbrev header */ | |
17980 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
17981 | cur_abbrev->tag |
17982 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
17983 | abbrev_ptr += bytes_read; |
17984 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
17985 | abbrev_ptr += 1; | |
17986 | ||
17987 | /* now read in declarations */ | |
22d2f3ab | 17988 | for (;;) |
c906108c | 17989 | { |
43988095 JK |
17990 | LONGEST implicit_const; |
17991 | ||
22d2f3ab JK |
17992 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
17993 | abbrev_ptr += bytes_read; | |
17994 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
17995 | abbrev_ptr += bytes_read; | |
43988095 JK |
17996 | if (abbrev_form == DW_FORM_implicit_const) |
17997 | { | |
17998 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
17999 | &bytes_read); | |
18000 | abbrev_ptr += bytes_read; | |
18001 | } | |
18002 | else | |
18003 | { | |
18004 | /* Initialize it due to a false compiler warning. */ | |
18005 | implicit_const = -1; | |
18006 | } | |
22d2f3ab JK |
18007 | |
18008 | if (abbrev_name == 0) | |
18009 | break; | |
18010 | ||
f3dd6933 | 18011 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 18012 | { |
f3dd6933 DJ |
18013 | allocated_attrs += ATTR_ALLOC_CHUNK; |
18014 | cur_attrs | |
224c3ddb | 18015 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 18016 | } |
ae038cb0 | 18017 | |
aead7601 SM |
18018 | cur_attrs[cur_abbrev->num_attrs].name |
18019 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 18020 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 18021 | = (enum dwarf_form) abbrev_form; |
43988095 | 18022 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 18023 | ++cur_abbrev->num_attrs; |
c906108c SS |
18024 | } |
18025 | ||
8d749320 SM |
18026 | cur_abbrev->attrs = |
18027 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
18028 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
18029 | memcpy (cur_abbrev->attrs, cur_attrs, |
18030 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
18031 | ||
433df2d4 | 18032 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
18033 | |
18034 | /* Get next abbreviation. | |
18035 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
18036 | always properly terminated with an abbrev number of 0. |
18037 | Exit loop if we encounter an abbreviation which we have | |
18038 | already read (which means we are about to read the abbreviations | |
18039 | for the next compile unit) or if the end of the abbreviation | |
18040 | table is reached. */ | |
433df2d4 | 18041 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
18042 | break; |
18043 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18044 | abbrev_ptr += bytes_read; | |
433df2d4 | 18045 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
18046 | break; |
18047 | } | |
f3dd6933 DJ |
18048 | |
18049 | xfree (cur_attrs); | |
433df2d4 | 18050 | return abbrev_table; |
c906108c SS |
18051 | } |
18052 | ||
433df2d4 | 18053 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 18054 | |
c906108c | 18055 | static void |
433df2d4 | 18056 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 18057 | { |
433df2d4 DE |
18058 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
18059 | xfree (abbrev_table); | |
c906108c SS |
18060 | } |
18061 | ||
f4dc4d17 DE |
18062 | /* Same as abbrev_table_free but as a cleanup. |
18063 | We pass in a pointer to the pointer to the table so that we can | |
18064 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 18065 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
18066 | |
18067 | static void | |
18068 | abbrev_table_free_cleanup (void *table_ptr) | |
18069 | { | |
9a3c8263 | 18070 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
18071 | |
18072 | if (*abbrev_table_ptr != NULL) | |
18073 | abbrev_table_free (*abbrev_table_ptr); | |
18074 | *abbrev_table_ptr = NULL; | |
18075 | } | |
18076 | ||
433df2d4 DE |
18077 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
18078 | ||
18079 | static void | |
18080 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
18081 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 18082 | { |
433df2d4 | 18083 | cu->abbrev_table = |
9c541725 | 18084 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 18085 | } |
c906108c | 18086 | |
433df2d4 | 18087 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 18088 | |
433df2d4 DE |
18089 | static void |
18090 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
18091 | { | |
9a3c8263 | 18092 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 18093 | |
a2ce51a0 DE |
18094 | if (cu->abbrev_table != NULL) |
18095 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
18096 | /* Set this to NULL so that we SEGV if we try to read it later, |
18097 | and also because free_comp_unit verifies this is NULL. */ | |
18098 | cu->abbrev_table = NULL; | |
18099 | } | |
18100 | \f | |
72bf9492 DJ |
18101 | /* Returns nonzero if TAG represents a type that we might generate a partial |
18102 | symbol for. */ | |
18103 | ||
18104 | static int | |
18105 | is_type_tag_for_partial (int tag) | |
18106 | { | |
18107 | switch (tag) | |
18108 | { | |
18109 | #if 0 | |
18110 | /* Some types that would be reasonable to generate partial symbols for, | |
18111 | that we don't at present. */ | |
18112 | case DW_TAG_array_type: | |
18113 | case DW_TAG_file_type: | |
18114 | case DW_TAG_ptr_to_member_type: | |
18115 | case DW_TAG_set_type: | |
18116 | case DW_TAG_string_type: | |
18117 | case DW_TAG_subroutine_type: | |
18118 | #endif | |
18119 | case DW_TAG_base_type: | |
18120 | case DW_TAG_class_type: | |
680b30c7 | 18121 | case DW_TAG_interface_type: |
72bf9492 DJ |
18122 | case DW_TAG_enumeration_type: |
18123 | case DW_TAG_structure_type: | |
18124 | case DW_TAG_subrange_type: | |
18125 | case DW_TAG_typedef: | |
18126 | case DW_TAG_union_type: | |
18127 | return 1; | |
18128 | default: | |
18129 | return 0; | |
18130 | } | |
18131 | } | |
18132 | ||
18133 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18134 | ||
18135 | static struct partial_die_info * | |
dee91e82 | 18136 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18137 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18138 | { |
dee91e82 | 18139 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 18140 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
18141 | struct partial_die_info *part_die; |
18142 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
18143 | struct abbrev_info *abbrev; | |
18144 | unsigned int bytes_read; | |
5afb4e99 | 18145 | unsigned int load_all = 0; |
72bf9492 DJ |
18146 | int nesting_level = 1; |
18147 | ||
18148 | parent_die = NULL; | |
18149 | last_die = NULL; | |
18150 | ||
7adf1e79 DE |
18151 | gdb_assert (cu->per_cu != NULL); |
18152 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18153 | load_all = 1; |
18154 | ||
72bf9492 DJ |
18155 | cu->partial_dies |
18156 | = htab_create_alloc_ex (cu->header.length / 12, | |
18157 | partial_die_hash, | |
18158 | partial_die_eq, | |
18159 | NULL, | |
18160 | &cu->comp_unit_obstack, | |
18161 | hashtab_obstack_allocate, | |
18162 | dummy_obstack_deallocate); | |
18163 | ||
8d749320 | 18164 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
18165 | |
18166 | while (1) | |
18167 | { | |
18168 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
18169 | ||
18170 | /* A NULL abbrev means the end of a series of children. */ | |
18171 | if (abbrev == NULL) | |
18172 | { | |
18173 | if (--nesting_level == 0) | |
18174 | { | |
18175 | /* PART_DIE was probably the last thing allocated on the | |
18176 | comp_unit_obstack, so we could call obstack_free | |
18177 | here. We don't do that because the waste is small, | |
18178 | and will be cleaned up when we're done with this | |
18179 | compilation unit. This way, we're also more robust | |
18180 | against other users of the comp_unit_obstack. */ | |
18181 | return first_die; | |
18182 | } | |
18183 | info_ptr += bytes_read; | |
18184 | last_die = parent_die; | |
18185 | parent_die = parent_die->die_parent; | |
18186 | continue; | |
18187 | } | |
18188 | ||
98bfdba5 PA |
18189 | /* Check for template arguments. We never save these; if |
18190 | they're seen, we just mark the parent, and go on our way. */ | |
18191 | if (parent_die != NULL | |
18192 | && cu->language == language_cplus | |
18193 | && (abbrev->tag == DW_TAG_template_type_param | |
18194 | || abbrev->tag == DW_TAG_template_value_param)) | |
18195 | { | |
18196 | parent_die->has_template_arguments = 1; | |
18197 | ||
18198 | if (!load_all) | |
18199 | { | |
18200 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18201 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18202 | continue; |
18203 | } | |
18204 | } | |
18205 | ||
0d99eb77 | 18206 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18207 | Skip their other children. */ |
18208 | if (!load_all | |
18209 | && cu->language == language_cplus | |
18210 | && parent_die != NULL | |
18211 | && parent_die->tag == DW_TAG_subprogram) | |
18212 | { | |
dee91e82 | 18213 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18214 | continue; |
18215 | } | |
18216 | ||
5afb4e99 DJ |
18217 | /* Check whether this DIE is interesting enough to save. Normally |
18218 | we would not be interested in members here, but there may be | |
18219 | later variables referencing them via DW_AT_specification (for | |
18220 | static members). */ | |
18221 | if (!load_all | |
18222 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 18223 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18224 | && abbrev->tag != DW_TAG_enumerator |
18225 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 18226 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18227 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18228 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18229 | && abbrev->tag != DW_TAG_module |
95554aad | 18230 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18231 | && abbrev->tag != DW_TAG_imported_unit |
18232 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18233 | { |
18234 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18235 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18236 | continue; |
18237 | } | |
18238 | ||
dee91e82 DE |
18239 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
18240 | info_ptr); | |
72bf9492 DJ |
18241 | |
18242 | /* This two-pass algorithm for processing partial symbols has a | |
18243 | high cost in cache pressure. Thus, handle some simple cases | |
18244 | here which cover the majority of C partial symbols. DIEs | |
18245 | which neither have specification tags in them, nor could have | |
18246 | specification tags elsewhere pointing at them, can simply be | |
18247 | processed and discarded. | |
18248 | ||
18249 | This segment is also optional; scan_partial_symbols and | |
18250 | add_partial_symbol will handle these DIEs if we chain | |
18251 | them in normally. When compilers which do not emit large | |
18252 | quantities of duplicate debug information are more common, | |
18253 | this code can probably be removed. */ | |
18254 | ||
18255 | /* Any complete simple types at the top level (pretty much all | |
18256 | of them, for a language without namespaces), can be processed | |
18257 | directly. */ | |
18258 | if (parent_die == NULL | |
18259 | && part_die->has_specification == 0 | |
18260 | && part_die->is_declaration == 0 | |
d8228535 | 18261 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
18262 | || part_die->tag == DW_TAG_base_type |
18263 | || part_die->tag == DW_TAG_subrange_type)) | |
18264 | { | |
18265 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 18266 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 18267 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 18268 | &objfile->static_psymbols, |
1762568f | 18269 | 0, cu->language, objfile); |
dee91e82 | 18270 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
18271 | continue; |
18272 | } | |
18273 | ||
d8228535 JK |
18274 | /* The exception for DW_TAG_typedef with has_children above is |
18275 | a workaround of GCC PR debug/47510. In the case of this complaint | |
18276 | type_name_no_tag_or_error will error on such types later. | |
18277 | ||
18278 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18279 | it could not find the child DIEs referenced later, this is checked | |
18280 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18281 | ||
18282 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
18283 | complaint (&symfile_complaints, | |
18284 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
18285 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 18286 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 18287 | |
72bf9492 DJ |
18288 | /* If we're at the second level, and we're an enumerator, and |
18289 | our parent has no specification (meaning possibly lives in a | |
18290 | namespace elsewhere), then we can add the partial symbol now | |
18291 | instead of queueing it. */ | |
18292 | if (part_die->tag == DW_TAG_enumerator | |
18293 | && parent_die != NULL | |
18294 | && parent_die->die_parent == NULL | |
18295 | && parent_die->tag == DW_TAG_enumeration_type | |
18296 | && parent_die->has_specification == 0) | |
18297 | { | |
18298 | if (part_die->name == NULL) | |
3e43a32a MS |
18299 | complaint (&symfile_complaints, |
18300 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 18301 | else if (building_psymtab) |
04a679b8 | 18302 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 18303 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 18304 | cu->language == language_cplus |
bb5ed363 DE |
18305 | ? &objfile->global_psymbols |
18306 | : &objfile->static_psymbols, | |
1762568f | 18307 | 0, cu->language, objfile); |
72bf9492 | 18308 | |
dee91e82 | 18309 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
18310 | continue; |
18311 | } | |
18312 | ||
18313 | /* We'll save this DIE so link it in. */ | |
18314 | part_die->die_parent = parent_die; | |
18315 | part_die->die_sibling = NULL; | |
18316 | part_die->die_child = NULL; | |
18317 | ||
18318 | if (last_die && last_die == parent_die) | |
18319 | last_die->die_child = part_die; | |
18320 | else if (last_die) | |
18321 | last_die->die_sibling = part_die; | |
18322 | ||
18323 | last_die = part_die; | |
18324 | ||
18325 | if (first_die == NULL) | |
18326 | first_die = part_die; | |
18327 | ||
18328 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
18329 | find interesting need to be in the hash table, because we | |
18330 | also have the parent/sibling/child chains; only those that we | |
18331 | might refer to by offset later during partial symbol reading. | |
18332 | ||
18333 | For now this means things that might have be the target of a | |
18334 | DW_AT_specification, DW_AT_abstract_origin, or | |
18335 | DW_AT_extension. DW_AT_extension will refer only to | |
18336 | namespaces; DW_AT_abstract_origin refers to functions (and | |
18337 | many things under the function DIE, but we do not recurse | |
18338 | into function DIEs during partial symbol reading) and | |
18339 | possibly variables as well; DW_AT_specification refers to | |
18340 | declarations. Declarations ought to have the DW_AT_declaration | |
18341 | flag. It happens that GCC forgets to put it in sometimes, but | |
18342 | only for functions, not for types. | |
18343 | ||
18344 | Adding more things than necessary to the hash table is harmless | |
18345 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
18346 | wasted time in find_partial_die, when we reread the compilation |
18347 | unit with load_all_dies set. */ | |
72bf9492 | 18348 | |
5afb4e99 | 18349 | if (load_all |
72929c62 | 18350 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 18351 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
18352 | || abbrev->tag == DW_TAG_variable |
18353 | || abbrev->tag == DW_TAG_namespace | |
18354 | || part_die->is_declaration) | |
18355 | { | |
18356 | void **slot; | |
18357 | ||
18358 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
18359 | to_underlying (part_die->sect_off), |
18360 | INSERT); | |
72bf9492 DJ |
18361 | *slot = part_die; |
18362 | } | |
18363 | ||
8d749320 | 18364 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
18365 | |
18366 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 18367 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
18368 | languages we have to, so that we can get at method physnames |
18369 | to infer fully qualified class names, for DW_AT_specification, | |
18370 | and for C++ template arguments. For C++, we also look one level | |
18371 | inside functions to find template arguments (if the name of the | |
18372 | function does not already contain the template arguments). | |
bc30ff58 JB |
18373 | |
18374 | For Ada, we need to scan the children of subprograms and lexical | |
18375 | blocks as well because Ada allows the definition of nested | |
18376 | entities that could be interesting for the debugger, such as | |
18377 | nested subprograms for instance. */ | |
72bf9492 | 18378 | if (last_die->has_children |
5afb4e99 DJ |
18379 | && (load_all |
18380 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 18381 | || last_die->tag == DW_TAG_module |
72bf9492 | 18382 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
18383 | || (cu->language == language_cplus |
18384 | && last_die->tag == DW_TAG_subprogram | |
18385 | && (last_die->name == NULL | |
18386 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
18387 | || (cu->language != language_c |
18388 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 18389 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 18390 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
18391 | || last_die->tag == DW_TAG_union_type)) |
18392 | || (cu->language == language_ada | |
18393 | && (last_die->tag == DW_TAG_subprogram | |
18394 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
18395 | { |
18396 | nesting_level++; | |
18397 | parent_die = last_die; | |
18398 | continue; | |
18399 | } | |
18400 | ||
18401 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18402 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
18403 | |
18404 | /* Back to the top, do it again. */ | |
18405 | } | |
18406 | } | |
18407 | ||
c906108c SS |
18408 | /* Read a minimal amount of information into the minimal die structure. */ |
18409 | ||
d521ce57 | 18410 | static const gdb_byte * |
dee91e82 DE |
18411 | read_partial_die (const struct die_reader_specs *reader, |
18412 | struct partial_die_info *part_die, | |
18413 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 18414 | const gdb_byte *info_ptr) |
c906108c | 18415 | { |
dee91e82 | 18416 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 18417 | struct objfile *objfile = cu->objfile; |
d521ce57 | 18418 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 18419 | unsigned int i; |
c906108c | 18420 | struct attribute attr; |
c5aa993b | 18421 | int has_low_pc_attr = 0; |
c906108c | 18422 | int has_high_pc_attr = 0; |
91da1414 | 18423 | int high_pc_relative = 0; |
c906108c | 18424 | |
72bf9492 | 18425 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 18426 | |
9c541725 | 18427 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
18428 | |
18429 | info_ptr += abbrev_len; | |
18430 | ||
18431 | if (abbrev == NULL) | |
18432 | return info_ptr; | |
18433 | ||
c906108c SS |
18434 | part_die->tag = abbrev->tag; |
18435 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
18436 | |
18437 | for (i = 0; i < abbrev->num_attrs; ++i) | |
18438 | { | |
dee91e82 | 18439 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
18440 | |
18441 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 18442 | partial symbol table. */ |
c906108c SS |
18443 | switch (attr.name) |
18444 | { | |
18445 | case DW_AT_name: | |
71c25dea TT |
18446 | switch (part_die->tag) |
18447 | { | |
18448 | case DW_TAG_compile_unit: | |
95554aad | 18449 | case DW_TAG_partial_unit: |
348e048f | 18450 | case DW_TAG_type_unit: |
71c25dea TT |
18451 | /* Compilation units have a DW_AT_name that is a filename, not |
18452 | a source language identifier. */ | |
18453 | case DW_TAG_enumeration_type: | |
18454 | case DW_TAG_enumerator: | |
18455 | /* These tags always have simple identifiers already; no need | |
18456 | to canonicalize them. */ | |
18457 | part_die->name = DW_STRING (&attr); | |
18458 | break; | |
18459 | default: | |
18460 | part_die->name | |
18461 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 18462 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
18463 | break; |
18464 | } | |
c906108c | 18465 | break; |
31ef98ae | 18466 | case DW_AT_linkage_name: |
c906108c | 18467 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18468 | /* Note that both forms of linkage name might appear. We |
18469 | assume they will be the same, and we only store the last | |
18470 | one we see. */ | |
94af9270 KS |
18471 | if (cu->language == language_ada) |
18472 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 18473 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
18474 | break; |
18475 | case DW_AT_low_pc: | |
18476 | has_low_pc_attr = 1; | |
31aa7e4e | 18477 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
18478 | break; |
18479 | case DW_AT_high_pc: | |
18480 | has_high_pc_attr = 1; | |
31aa7e4e JB |
18481 | part_die->highpc = attr_value_as_address (&attr); |
18482 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
18483 | high_pc_relative = 1; | |
c906108c SS |
18484 | break; |
18485 | case DW_AT_location: | |
0963b4bd | 18486 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
18487 | if (attr_form_is_block (&attr)) |
18488 | { | |
95554aad | 18489 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18490 | } |
3690dd37 | 18491 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 18492 | { |
4d3c2250 | 18493 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18494 | } |
18495 | else | |
18496 | { | |
4d3c2250 KB |
18497 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18498 | "partial symbol information"); | |
8e19ed76 | 18499 | } |
c906108c | 18500 | break; |
c906108c SS |
18501 | case DW_AT_external: |
18502 | part_die->is_external = DW_UNSND (&attr); | |
18503 | break; | |
18504 | case DW_AT_declaration: | |
18505 | part_die->is_declaration = DW_UNSND (&attr); | |
18506 | break; | |
18507 | case DW_AT_type: | |
18508 | part_die->has_type = 1; | |
18509 | break; | |
18510 | case DW_AT_abstract_origin: | |
18511 | case DW_AT_specification: | |
72bf9492 DJ |
18512 | case DW_AT_extension: |
18513 | part_die->has_specification = 1; | |
c764a876 | 18514 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
18515 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
18516 | || cu->per_cu->is_dwz); | |
c906108c SS |
18517 | break; |
18518 | case DW_AT_sibling: | |
18519 | /* Ignore absolute siblings, they might point outside of | |
18520 | the current compile unit. */ | |
18521 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
18522 | complaint (&symfile_complaints, |
18523 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 18524 | else |
b9502d3f | 18525 | { |
9c541725 PA |
18526 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
18527 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
18528 | |
18529 | if (sibling_ptr < info_ptr) | |
18530 | complaint (&symfile_complaints, | |
18531 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
18532 | else if (sibling_ptr > reader->buffer_end) |
18533 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
18534 | else |
18535 | part_die->sibling = sibling_ptr; | |
18536 | } | |
c906108c | 18537 | break; |
fa4028e9 JB |
18538 | case DW_AT_byte_size: |
18539 | part_die->has_byte_size = 1; | |
18540 | break; | |
ff908ebf AW |
18541 | case DW_AT_const_value: |
18542 | part_die->has_const_value = 1; | |
18543 | break; | |
68511cec CES |
18544 | case DW_AT_calling_convention: |
18545 | /* DWARF doesn't provide a way to identify a program's source-level | |
18546 | entry point. DW_AT_calling_convention attributes are only meant | |
18547 | to describe functions' calling conventions. | |
18548 | ||
18549 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18550 | Fortran, and before DWARF 4 DW_CC_program was the only |
18551 | piece of debugging information whose definition refers to | |
18552 | a 'main program' at all, several compilers marked Fortran | |
18553 | main programs with DW_CC_program --- even when those | |
18554 | functions use the standard calling conventions. | |
18555 | ||
18556 | Although DWARF now specifies a way to provide this | |
18557 | information, we support this practice for backward | |
18558 | compatibility. */ | |
68511cec | 18559 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
18560 | && cu->language == language_fortran) |
18561 | part_die->main_subprogram = 1; | |
68511cec | 18562 | break; |
481860b3 GB |
18563 | case DW_AT_inline: |
18564 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18565 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
18566 | part_die->may_be_inlined = 1; | |
18567 | break; | |
95554aad TT |
18568 | |
18569 | case DW_AT_import: | |
18570 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 18571 | { |
9c541725 | 18572 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
18573 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
18574 | || cu->per_cu->is_dwz); | |
18575 | } | |
95554aad TT |
18576 | break; |
18577 | ||
0c1b455e TT |
18578 | case DW_AT_main_subprogram: |
18579 | part_die->main_subprogram = DW_UNSND (&attr); | |
18580 | break; | |
18581 | ||
c906108c SS |
18582 | default: |
18583 | break; | |
18584 | } | |
18585 | } | |
18586 | ||
91da1414 MW |
18587 | if (high_pc_relative) |
18588 | part_die->highpc += part_die->lowpc; | |
18589 | ||
9373cf26 JK |
18590 | if (has_low_pc_attr && has_high_pc_attr) |
18591 | { | |
18592 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18593 | eliminate duplicate copies of functions and vtables and such. | |
18594 | The linker will arbitrarily choose one and discard the others. | |
18595 | The AT_*_pc values for such functions refer to local labels in | |
18596 | these sections. If the section from that file was discarded, the | |
18597 | labels are not in the output, so the relocs get a value of 0. | |
18598 | If this is a discarded function, mark the pc bounds as invalid, | |
18599 | so that GDB will ignore it. */ | |
18600 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
18601 | { | |
bb5ed363 | 18602 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
18603 | |
18604 | complaint (&symfile_complaints, | |
18605 | _("DW_AT_low_pc %s is zero " | |
18606 | "for DIE at 0x%x [in module %s]"), | |
18607 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 18608 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
18609 | } |
18610 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
18611 | else if (part_die->lowpc >= part_die->highpc) | |
18612 | { | |
bb5ed363 | 18613 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
18614 | |
18615 | complaint (&symfile_complaints, | |
18616 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
18617 | "for DIE at 0x%x [in module %s]"), | |
18618 | paddress (gdbarch, part_die->lowpc), | |
18619 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
18620 | to_underlying (part_die->sect_off), |
18621 | objfile_name (objfile)); | |
9373cf26 JK |
18622 | } |
18623 | else | |
18624 | part_die->has_pc_info = 1; | |
18625 | } | |
85cbf3d3 | 18626 | |
c906108c SS |
18627 | return info_ptr; |
18628 | } | |
18629 | ||
72bf9492 DJ |
18630 | /* Find a cached partial DIE at OFFSET in CU. */ |
18631 | ||
18632 | static struct partial_die_info * | |
9c541725 | 18633 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
18634 | { |
18635 | struct partial_die_info *lookup_die = NULL; | |
18636 | struct partial_die_info part_die; | |
18637 | ||
9c541725 | 18638 | part_die.sect_off = sect_off; |
9a3c8263 SM |
18639 | lookup_die = ((struct partial_die_info *) |
18640 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 18641 | to_underlying (sect_off))); |
72bf9492 | 18642 | |
72bf9492 DJ |
18643 | return lookup_die; |
18644 | } | |
18645 | ||
348e048f DE |
18646 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18647 | except in the case of .debug_types DIEs which do not reference | |
18648 | outside their CU (they do however referencing other types via | |
55f1336d | 18649 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
18650 | |
18651 | static struct partial_die_info * | |
9c541725 | 18652 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18653 | { |
bb5ed363 | 18654 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
18655 | struct dwarf2_per_cu_data *per_cu = NULL; |
18656 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18657 | |
36586728 | 18658 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 18659 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 18660 | { |
9c541725 | 18661 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
18662 | if (pd != NULL) |
18663 | return pd; | |
0d99eb77 DE |
18664 | /* We missed recording what we needed. |
18665 | Load all dies and try again. */ | |
18666 | per_cu = cu->per_cu; | |
5afb4e99 | 18667 | } |
0d99eb77 DE |
18668 | else |
18669 | { | |
18670 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18671 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18672 | { |
9c541725 PA |
18673 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
18674 | " external reference to offset 0x%x [in module %s].\n"), | |
18675 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
18676 | bfd_get_filename (objfile->obfd)); |
18677 | } | |
9c541725 | 18678 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 18679 | objfile); |
72bf9492 | 18680 | |
0d99eb77 DE |
18681 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
18682 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 18683 | |
0d99eb77 | 18684 | per_cu->cu->last_used = 0; |
9c541725 | 18685 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 18686 | } |
5afb4e99 | 18687 | |
dee91e82 DE |
18688 | /* If we didn't find it, and not all dies have been loaded, |
18689 | load them all and try again. */ | |
18690 | ||
5afb4e99 DJ |
18691 | if (pd == NULL && per_cu->load_all_dies == 0) |
18692 | { | |
5afb4e99 | 18693 | per_cu->load_all_dies = 1; |
fd820528 DE |
18694 | |
18695 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
18696 | THIS_CU->cu may already be in use. So we can't just free it and | |
18697 | replace its DIEs with the ones we read in. Instead, we leave those | |
18698 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
18699 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
18700 | set. */ | |
dee91e82 | 18701 | load_partial_comp_unit (per_cu); |
5afb4e99 | 18702 | |
9c541725 | 18703 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
18704 | } |
18705 | ||
18706 | if (pd == NULL) | |
18707 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
18708 | _("could not find partial DIE 0x%x " |
18709 | "in cache [from module %s]\n"), | |
9c541725 | 18710 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 18711 | return pd; |
72bf9492 DJ |
18712 | } |
18713 | ||
abc72ce4 DE |
18714 | /* See if we can figure out if the class lives in a namespace. We do |
18715 | this by looking for a member function; its demangled name will | |
18716 | contain namespace info, if there is any. */ | |
18717 | ||
18718 | static void | |
18719 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
18720 | struct dwarf2_cu *cu) | |
18721 | { | |
18722 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
18723 | what template types look like, because the demangler | |
18724 | frequently doesn't give the same name as the debug info. We | |
18725 | could fix this by only using the demangled name to get the | |
18726 | prefix (but see comment in read_structure_type). */ | |
18727 | ||
18728 | struct partial_die_info *real_pdi; | |
18729 | struct partial_die_info *child_pdi; | |
18730 | ||
18731 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
18732 | we should not do this. We'll prepend the parent's fully qualified | |
18733 | name when we create the partial symbol. */ | |
18734 | ||
18735 | real_pdi = struct_pdi; | |
18736 | while (real_pdi->has_specification) | |
36586728 TT |
18737 | real_pdi = find_partial_die (real_pdi->spec_offset, |
18738 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
18739 | |
18740 | if (real_pdi->die_parent != NULL) | |
18741 | return; | |
18742 | ||
18743 | for (child_pdi = struct_pdi->die_child; | |
18744 | child_pdi != NULL; | |
18745 | child_pdi = child_pdi->die_sibling) | |
18746 | { | |
18747 | if (child_pdi->tag == DW_TAG_subprogram | |
18748 | && child_pdi->linkage_name != NULL) | |
18749 | { | |
18750 | char *actual_class_name | |
18751 | = language_class_name_from_physname (cu->language_defn, | |
18752 | child_pdi->linkage_name); | |
18753 | if (actual_class_name != NULL) | |
18754 | { | |
18755 | struct_pdi->name | |
224c3ddb SM |
18756 | = ((const char *) |
18757 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
18758 | actual_class_name, | |
18759 | strlen (actual_class_name))); | |
abc72ce4 DE |
18760 | xfree (actual_class_name); |
18761 | } | |
18762 | break; | |
18763 | } | |
18764 | } | |
18765 | } | |
18766 | ||
72bf9492 DJ |
18767 | /* Adjust PART_DIE before generating a symbol for it. This function |
18768 | may set the is_external flag or change the DIE's name. */ | |
18769 | ||
18770 | static void | |
18771 | fixup_partial_die (struct partial_die_info *part_die, | |
18772 | struct dwarf2_cu *cu) | |
18773 | { | |
abc72ce4 DE |
18774 | /* Once we've fixed up a die, there's no point in doing so again. |
18775 | This also avoids a memory leak if we were to call | |
18776 | guess_partial_die_structure_name multiple times. */ | |
18777 | if (part_die->fixup_called) | |
18778 | return; | |
18779 | ||
72bf9492 DJ |
18780 | /* If we found a reference attribute and the DIE has no name, try |
18781 | to find a name in the referred to DIE. */ | |
18782 | ||
18783 | if (part_die->name == NULL && part_die->has_specification) | |
18784 | { | |
18785 | struct partial_die_info *spec_die; | |
72bf9492 | 18786 | |
36586728 TT |
18787 | spec_die = find_partial_die (part_die->spec_offset, |
18788 | part_die->spec_is_dwz, cu); | |
72bf9492 | 18789 | |
10b3939b | 18790 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
18791 | |
18792 | if (spec_die->name) | |
18793 | { | |
18794 | part_die->name = spec_die->name; | |
18795 | ||
18796 | /* Copy DW_AT_external attribute if it is set. */ | |
18797 | if (spec_die->is_external) | |
18798 | part_die->is_external = spec_die->is_external; | |
18799 | } | |
18800 | } | |
18801 | ||
18802 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
18803 | |
18804 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 18805 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 18806 | |
abc72ce4 DE |
18807 | /* If there is no parent die to provide a namespace, and there are |
18808 | children, see if we can determine the namespace from their linkage | |
122d1940 | 18809 | name. */ |
abc72ce4 | 18810 | if (cu->language == language_cplus |
8b70b953 | 18811 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
18812 | && part_die->die_parent == NULL |
18813 | && part_die->has_children | |
18814 | && (part_die->tag == DW_TAG_class_type | |
18815 | || part_die->tag == DW_TAG_structure_type | |
18816 | || part_die->tag == DW_TAG_union_type)) | |
18817 | guess_partial_die_structure_name (part_die, cu); | |
18818 | ||
53832f31 TT |
18819 | /* GCC might emit a nameless struct or union that has a linkage |
18820 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
18821 | if (part_die->name == NULL | |
96408a79 SA |
18822 | && (part_die->tag == DW_TAG_class_type |
18823 | || part_die->tag == DW_TAG_interface_type | |
18824 | || part_die->tag == DW_TAG_structure_type | |
18825 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
18826 | && part_die->linkage_name != NULL) |
18827 | { | |
18828 | char *demangled; | |
18829 | ||
8de20a37 | 18830 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
18831 | if (demangled) |
18832 | { | |
96408a79 SA |
18833 | const char *base; |
18834 | ||
18835 | /* Strip any leading namespaces/classes, keep only the base name. | |
18836 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
18837 | base = strrchr (demangled, ':'); | |
18838 | if (base && base > demangled && base[-1] == ':') | |
18839 | base++; | |
18840 | else | |
18841 | base = demangled; | |
18842 | ||
34a68019 | 18843 | part_die->name |
224c3ddb SM |
18844 | = ((const char *) |
18845 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
18846 | base, strlen (base))); | |
53832f31 TT |
18847 | xfree (demangled); |
18848 | } | |
18849 | } | |
18850 | ||
abc72ce4 | 18851 | part_die->fixup_called = 1; |
72bf9492 DJ |
18852 | } |
18853 | ||
a8329558 | 18854 | /* Read an attribute value described by an attribute form. */ |
c906108c | 18855 | |
d521ce57 | 18856 | static const gdb_byte * |
dee91e82 DE |
18857 | read_attribute_value (const struct die_reader_specs *reader, |
18858 | struct attribute *attr, unsigned form, | |
43988095 | 18859 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 18860 | { |
dee91e82 | 18861 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
18862 | struct objfile *objfile = cu->objfile; |
18863 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 18864 | bfd *abfd = reader->abfd; |
e7c27a73 | 18865 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
18866 | unsigned int bytes_read; |
18867 | struct dwarf_block *blk; | |
18868 | ||
aead7601 | 18869 | attr->form = (enum dwarf_form) form; |
a8329558 | 18870 | switch (form) |
c906108c | 18871 | { |
c906108c | 18872 | case DW_FORM_ref_addr: |
ae411497 | 18873 | if (cu->header.version == 2) |
4568ecf9 | 18874 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 18875 | else |
4568ecf9 DE |
18876 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
18877 | &cu->header, &bytes_read); | |
ae411497 TT |
18878 | info_ptr += bytes_read; |
18879 | break; | |
36586728 TT |
18880 | case DW_FORM_GNU_ref_alt: |
18881 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
18882 | info_ptr += bytes_read; | |
18883 | break; | |
ae411497 | 18884 | case DW_FORM_addr: |
e7c27a73 | 18885 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 18886 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 18887 | info_ptr += bytes_read; |
c906108c SS |
18888 | break; |
18889 | case DW_FORM_block2: | |
7b5a2f43 | 18890 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18891 | blk->size = read_2_bytes (abfd, info_ptr); |
18892 | info_ptr += 2; | |
18893 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18894 | info_ptr += blk->size; | |
18895 | DW_BLOCK (attr) = blk; | |
18896 | break; | |
18897 | case DW_FORM_block4: | |
7b5a2f43 | 18898 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18899 | blk->size = read_4_bytes (abfd, info_ptr); |
18900 | info_ptr += 4; | |
18901 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18902 | info_ptr += blk->size; | |
18903 | DW_BLOCK (attr) = blk; | |
18904 | break; | |
18905 | case DW_FORM_data2: | |
18906 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
18907 | info_ptr += 2; | |
18908 | break; | |
18909 | case DW_FORM_data4: | |
18910 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
18911 | info_ptr += 4; | |
18912 | break; | |
18913 | case DW_FORM_data8: | |
18914 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
18915 | info_ptr += 8; | |
18916 | break; | |
0224619f JK |
18917 | case DW_FORM_data16: |
18918 | blk = dwarf_alloc_block (cu); | |
18919 | blk->size = 16; | |
18920 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
18921 | info_ptr += 16; | |
18922 | DW_BLOCK (attr) = blk; | |
18923 | break; | |
2dc7f7b3 TT |
18924 | case DW_FORM_sec_offset: |
18925 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
18926 | info_ptr += bytes_read; | |
18927 | break; | |
c906108c | 18928 | case DW_FORM_string: |
9b1c24c8 | 18929 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 18930 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
18931 | info_ptr += bytes_read; |
18932 | break; | |
4bdf3d34 | 18933 | case DW_FORM_strp: |
36586728 TT |
18934 | if (!cu->per_cu->is_dwz) |
18935 | { | |
18936 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
18937 | &bytes_read); | |
18938 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18939 | info_ptr += bytes_read; | |
18940 | break; | |
18941 | } | |
18942 | /* FALLTHROUGH */ | |
43988095 JK |
18943 | case DW_FORM_line_strp: |
18944 | if (!cu->per_cu->is_dwz) | |
18945 | { | |
18946 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
18947 | cu_header, &bytes_read); | |
18948 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18949 | info_ptr += bytes_read; | |
18950 | break; | |
18951 | } | |
18952 | /* FALLTHROUGH */ | |
36586728 TT |
18953 | case DW_FORM_GNU_strp_alt: |
18954 | { | |
18955 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18956 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
18957 | &bytes_read); | |
18958 | ||
18959 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
18960 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18961 | info_ptr += bytes_read; | |
18962 | } | |
4bdf3d34 | 18963 | break; |
2dc7f7b3 | 18964 | case DW_FORM_exprloc: |
c906108c | 18965 | case DW_FORM_block: |
7b5a2f43 | 18966 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18967 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18968 | info_ptr += bytes_read; | |
18969 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18970 | info_ptr += blk->size; | |
18971 | DW_BLOCK (attr) = blk; | |
18972 | break; | |
18973 | case DW_FORM_block1: | |
7b5a2f43 | 18974 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18975 | blk->size = read_1_byte (abfd, info_ptr); |
18976 | info_ptr += 1; | |
18977 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18978 | info_ptr += blk->size; | |
18979 | DW_BLOCK (attr) = blk; | |
18980 | break; | |
18981 | case DW_FORM_data1: | |
18982 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18983 | info_ptr += 1; | |
18984 | break; | |
18985 | case DW_FORM_flag: | |
18986 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18987 | info_ptr += 1; | |
18988 | break; | |
2dc7f7b3 TT |
18989 | case DW_FORM_flag_present: |
18990 | DW_UNSND (attr) = 1; | |
18991 | break; | |
c906108c SS |
18992 | case DW_FORM_sdata: |
18993 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18994 | info_ptr += bytes_read; | |
18995 | break; | |
18996 | case DW_FORM_udata: | |
18997 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
18998 | info_ptr += bytes_read; | |
18999 | break; | |
19000 | case DW_FORM_ref1: | |
9c541725 | 19001 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19002 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
19003 | info_ptr += 1; |
19004 | break; | |
19005 | case DW_FORM_ref2: | |
9c541725 | 19006 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19007 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
19008 | info_ptr += 2; |
19009 | break; | |
19010 | case DW_FORM_ref4: | |
9c541725 | 19011 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19012 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
19013 | info_ptr += 4; |
19014 | break; | |
613e1657 | 19015 | case DW_FORM_ref8: |
9c541725 | 19016 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19017 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
19018 | info_ptr += 8; |
19019 | break; | |
55f1336d | 19020 | case DW_FORM_ref_sig8: |
ac9ec31b | 19021 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
19022 | info_ptr += 8; |
19023 | break; | |
c906108c | 19024 | case DW_FORM_ref_udata: |
9c541725 | 19025 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19026 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19027 | info_ptr += bytes_read; |
19028 | break; | |
c906108c | 19029 | case DW_FORM_indirect: |
a8329558 KW |
19030 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19031 | info_ptr += bytes_read; | |
43988095 JK |
19032 | if (form == DW_FORM_implicit_const) |
19033 | { | |
19034 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19035 | info_ptr += bytes_read; | |
19036 | } | |
19037 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
19038 | info_ptr); | |
19039 | break; | |
19040 | case DW_FORM_implicit_const: | |
19041 | DW_SND (attr) = implicit_const; | |
a8329558 | 19042 | break; |
3019eac3 DE |
19043 | case DW_FORM_GNU_addr_index: |
19044 | if (reader->dwo_file == NULL) | |
19045 | { | |
19046 | /* For now flag a hard error. | |
19047 | Later we can turn this into a complaint. */ | |
19048 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19049 | dwarf_form_name (form), | |
19050 | bfd_get_filename (abfd)); | |
19051 | } | |
19052 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
19053 | info_ptr += bytes_read; | |
19054 | break; | |
19055 | case DW_FORM_GNU_str_index: | |
19056 | if (reader->dwo_file == NULL) | |
19057 | { | |
19058 | /* For now flag a hard error. | |
19059 | Later we can turn this into a complaint if warranted. */ | |
19060 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19061 | dwarf_form_name (form), | |
19062 | bfd_get_filename (abfd)); | |
19063 | } | |
19064 | { | |
19065 | ULONGEST str_index = | |
19066 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19067 | ||
342587c4 | 19068 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
19069 | DW_STRING_IS_CANONICAL (attr) = 0; |
19070 | info_ptr += bytes_read; | |
19071 | } | |
19072 | break; | |
c906108c | 19073 | default: |
8a3fe4f8 | 19074 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
19075 | dwarf_form_name (form), |
19076 | bfd_get_filename (abfd)); | |
c906108c | 19077 | } |
28e94949 | 19078 | |
36586728 | 19079 | /* Super hack. */ |
7771576e | 19080 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
19081 | attr->form = DW_FORM_GNU_ref_alt; |
19082 | ||
28e94949 JB |
19083 | /* We have seen instances where the compiler tried to emit a byte |
19084 | size attribute of -1 which ended up being encoded as an unsigned | |
19085 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
19086 | an object of this size seems pretty unlikely so we can relatively | |
19087 | safely treat these cases as if the size attribute was invalid and | |
19088 | treat them as zero by default. */ | |
19089 | if (attr->name == DW_AT_byte_size | |
19090 | && form == DW_FORM_data4 | |
19091 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
19092 | { |
19093 | complaint | |
19094 | (&symfile_complaints, | |
43bbcdc2 PH |
19095 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
19096 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
19097 | DW_UNSND (attr) = 0; |
19098 | } | |
28e94949 | 19099 | |
c906108c SS |
19100 | return info_ptr; |
19101 | } | |
19102 | ||
a8329558 KW |
19103 | /* Read an attribute described by an abbreviated attribute. */ |
19104 | ||
d521ce57 | 19105 | static const gdb_byte * |
dee91e82 DE |
19106 | read_attribute (const struct die_reader_specs *reader, |
19107 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 19108 | const gdb_byte *info_ptr) |
a8329558 KW |
19109 | { |
19110 | attr->name = abbrev->name; | |
43988095 JK |
19111 | return read_attribute_value (reader, attr, abbrev->form, |
19112 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
19113 | } |
19114 | ||
0963b4bd | 19115 | /* Read dwarf information from a buffer. */ |
c906108c SS |
19116 | |
19117 | static unsigned int | |
a1855c1d | 19118 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19119 | { |
fe1b8b76 | 19120 | return bfd_get_8 (abfd, buf); |
c906108c SS |
19121 | } |
19122 | ||
19123 | static int | |
a1855c1d | 19124 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19125 | { |
fe1b8b76 | 19126 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
19127 | } |
19128 | ||
19129 | static unsigned int | |
a1855c1d | 19130 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19131 | { |
fe1b8b76 | 19132 | return bfd_get_16 (abfd, buf); |
c906108c SS |
19133 | } |
19134 | ||
21ae7a4d | 19135 | static int |
a1855c1d | 19136 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19137 | { |
19138 | return bfd_get_signed_16 (abfd, buf); | |
19139 | } | |
19140 | ||
c906108c | 19141 | static unsigned int |
a1855c1d | 19142 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19143 | { |
fe1b8b76 | 19144 | return bfd_get_32 (abfd, buf); |
c906108c SS |
19145 | } |
19146 | ||
21ae7a4d | 19147 | static int |
a1855c1d | 19148 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19149 | { |
19150 | return bfd_get_signed_32 (abfd, buf); | |
19151 | } | |
19152 | ||
93311388 | 19153 | static ULONGEST |
a1855c1d | 19154 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19155 | { |
fe1b8b76 | 19156 | return bfd_get_64 (abfd, buf); |
c906108c SS |
19157 | } |
19158 | ||
19159 | static CORE_ADDR | |
d521ce57 | 19160 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 19161 | unsigned int *bytes_read) |
c906108c | 19162 | { |
e7c27a73 | 19163 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19164 | CORE_ADDR retval = 0; |
19165 | ||
107d2387 | 19166 | if (cu_header->signed_addr_p) |
c906108c | 19167 | { |
107d2387 AC |
19168 | switch (cu_header->addr_size) |
19169 | { | |
19170 | case 2: | |
fe1b8b76 | 19171 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
19172 | break; |
19173 | case 4: | |
fe1b8b76 | 19174 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
19175 | break; |
19176 | case 8: | |
fe1b8b76 | 19177 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
19178 | break; |
19179 | default: | |
8e65ff28 | 19180 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 19181 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 19182 | bfd_get_filename (abfd)); |
107d2387 AC |
19183 | } |
19184 | } | |
19185 | else | |
19186 | { | |
19187 | switch (cu_header->addr_size) | |
19188 | { | |
19189 | case 2: | |
fe1b8b76 | 19190 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
19191 | break; |
19192 | case 4: | |
fe1b8b76 | 19193 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
19194 | break; |
19195 | case 8: | |
fe1b8b76 | 19196 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
19197 | break; |
19198 | default: | |
8e65ff28 | 19199 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
19200 | _("read_address: bad switch, " |
19201 | "unsigned [in module %s]"), | |
659b0389 | 19202 | bfd_get_filename (abfd)); |
107d2387 | 19203 | } |
c906108c | 19204 | } |
64367e0a | 19205 | |
107d2387 AC |
19206 | *bytes_read = cu_header->addr_size; |
19207 | return retval; | |
c906108c SS |
19208 | } |
19209 | ||
f7ef9339 | 19210 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
19211 | specification allows the initial length to take up either 4 bytes |
19212 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
19213 | bytes describe the length and all offsets will be 8 bytes in length | |
19214 | instead of 4. | |
19215 | ||
f7ef9339 KB |
19216 | An older, non-standard 64-bit format is also handled by this |
19217 | function. The older format in question stores the initial length | |
19218 | as an 8-byte quantity without an escape value. Lengths greater | |
19219 | than 2^32 aren't very common which means that the initial 4 bytes | |
19220 | is almost always zero. Since a length value of zero doesn't make | |
19221 | sense for the 32-bit format, this initial zero can be considered to | |
19222 | be an escape value which indicates the presence of the older 64-bit | |
19223 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
19224 | greater than 4GB. If it becomes necessary to handle lengths |
19225 | somewhat larger than 4GB, we could allow other small values (such | |
19226 | as the non-sensical values of 1, 2, and 3) to also be used as | |
19227 | escape values indicating the presence of the old format. | |
f7ef9339 | 19228 | |
917c78fc MK |
19229 | The value returned via bytes_read should be used to increment the |
19230 | relevant pointer after calling read_initial_length(). | |
c764a876 | 19231 | |
613e1657 KB |
19232 | [ Note: read_initial_length() and read_offset() are based on the |
19233 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 19234 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
19235 | from: |
19236 | ||
f7ef9339 | 19237 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 19238 | |
613e1657 KB |
19239 | This document is only a draft and is subject to change. (So beware.) |
19240 | ||
f7ef9339 | 19241 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
19242 | determined empirically by examining 64-bit ELF files produced by |
19243 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
19244 | |
19245 | - Kevin, July 16, 2002 | |
613e1657 KB |
19246 | ] */ |
19247 | ||
19248 | static LONGEST | |
d521ce57 | 19249 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 19250 | { |
fe1b8b76 | 19251 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 19252 | |
dd373385 | 19253 | if (length == 0xffffffff) |
613e1657 | 19254 | { |
fe1b8b76 | 19255 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 19256 | *bytes_read = 12; |
613e1657 | 19257 | } |
dd373385 | 19258 | else if (length == 0) |
f7ef9339 | 19259 | { |
dd373385 | 19260 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 19261 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 19262 | *bytes_read = 8; |
f7ef9339 | 19263 | } |
613e1657 KB |
19264 | else |
19265 | { | |
19266 | *bytes_read = 4; | |
613e1657 KB |
19267 | } |
19268 | ||
c764a876 DE |
19269 | return length; |
19270 | } | |
dd373385 | 19271 | |
c764a876 DE |
19272 | /* Cover function for read_initial_length. |
19273 | Returns the length of the object at BUF, and stores the size of the | |
19274 | initial length in *BYTES_READ and stores the size that offsets will be in | |
19275 | *OFFSET_SIZE. | |
19276 | If the initial length size is not equivalent to that specified in | |
19277 | CU_HEADER then issue a complaint. | |
19278 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 19279 | |
c764a876 | 19280 | static LONGEST |
d521ce57 | 19281 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
19282 | const struct comp_unit_head *cu_header, |
19283 | unsigned int *bytes_read, | |
19284 | unsigned int *offset_size) | |
19285 | { | |
19286 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
19287 | ||
19288 | gdb_assert (cu_header->initial_length_size == 4 | |
19289 | || cu_header->initial_length_size == 8 | |
19290 | || cu_header->initial_length_size == 12); | |
19291 | ||
19292 | if (cu_header->initial_length_size != *bytes_read) | |
19293 | complaint (&symfile_complaints, | |
19294 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 19295 | |
c764a876 | 19296 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 19297 | return length; |
613e1657 KB |
19298 | } |
19299 | ||
19300 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 19301 | given by cu_header->offset_size. */ |
613e1657 KB |
19302 | |
19303 | static LONGEST | |
d521ce57 TT |
19304 | read_offset (bfd *abfd, const gdb_byte *buf, |
19305 | const struct comp_unit_head *cu_header, | |
891d2f0b | 19306 | unsigned int *bytes_read) |
c764a876 DE |
19307 | { |
19308 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 19309 | |
c764a876 DE |
19310 | *bytes_read = cu_header->offset_size; |
19311 | return offset; | |
19312 | } | |
19313 | ||
19314 | /* Read an offset from the data stream. */ | |
19315 | ||
19316 | static LONGEST | |
d521ce57 | 19317 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
19318 | { |
19319 | LONGEST retval = 0; | |
19320 | ||
c764a876 | 19321 | switch (offset_size) |
613e1657 KB |
19322 | { |
19323 | case 4: | |
fe1b8b76 | 19324 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
19325 | break; |
19326 | case 8: | |
fe1b8b76 | 19327 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
19328 | break; |
19329 | default: | |
8e65ff28 | 19330 | internal_error (__FILE__, __LINE__, |
c764a876 | 19331 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 19332 | bfd_get_filename (abfd)); |
613e1657 KB |
19333 | } |
19334 | ||
917c78fc | 19335 | return retval; |
613e1657 KB |
19336 | } |
19337 | ||
d521ce57 TT |
19338 | static const gdb_byte * |
19339 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
19340 | { |
19341 | /* If the size of a host char is 8 bits, we can return a pointer | |
19342 | to the buffer, otherwise we have to copy the data to a buffer | |
19343 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19344 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 19345 | return buf; |
c906108c SS |
19346 | } |
19347 | ||
d521ce57 TT |
19348 | static const char * |
19349 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
19350 | unsigned int *bytes_read_ptr) | |
c906108c SS |
19351 | { |
19352 | /* If the size of a host char is 8 bits, we can return a pointer | |
19353 | to the string, otherwise we have to copy the string to a buffer | |
19354 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19355 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
19356 | if (*buf == '\0') |
19357 | { | |
19358 | *bytes_read_ptr = 1; | |
19359 | return NULL; | |
19360 | } | |
d521ce57 TT |
19361 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
19362 | return (const char *) buf; | |
4bdf3d34 JJ |
19363 | } |
19364 | ||
43988095 JK |
19365 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
19366 | reporting strings FORM_NAME and SECT_NAME. */ | |
19367 | ||
d521ce57 | 19368 | static const char * |
43988095 JK |
19369 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
19370 | struct dwarf2_section_info *sect, | |
19371 | const char *form_name, | |
19372 | const char *sect_name) | |
19373 | { | |
19374 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
19375 | if (sect->buffer == NULL) | |
19376 | error (_("%s used without %s section [in module %s]"), | |
19377 | form_name, sect_name, bfd_get_filename (abfd)); | |
19378 | if (str_offset >= sect->size) | |
19379 | error (_("%s pointing outside of %s section [in module %s]"), | |
19380 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 19381 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 19382 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 19383 | return NULL; |
43988095 JK |
19384 | return (const char *) (sect->buffer + str_offset); |
19385 | } | |
19386 | ||
19387 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
19388 | ||
19389 | static const char * | |
19390 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
19391 | { | |
19392 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
19393 | &dwarf2_per_objfile->str, | |
19394 | "DW_FORM_strp", ".debug_str"); | |
19395 | } | |
19396 | ||
19397 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
19398 | ||
19399 | static const char * | |
19400 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
19401 | { | |
19402 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
19403 | &dwarf2_per_objfile->line_str, | |
19404 | "DW_FORM_line_strp", | |
19405 | ".debug_line_str"); | |
c906108c SS |
19406 | } |
19407 | ||
36586728 TT |
19408 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
19409 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
19410 | the string consists of a single NUL byte, return NULL; otherwise | |
19411 | return a pointer to the string. */ | |
19412 | ||
d521ce57 | 19413 | static const char * |
36586728 TT |
19414 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
19415 | { | |
19416 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
19417 | ||
19418 | if (dwz->str.buffer == NULL) | |
19419 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
19420 | "section [in module %s]"), | |
19421 | bfd_get_filename (dwz->dwz_bfd)); | |
19422 | if (str_offset >= dwz->str.size) | |
19423 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
19424 | ".debug_str section [in module %s]"), | |
19425 | bfd_get_filename (dwz->dwz_bfd)); | |
19426 | gdb_assert (HOST_CHAR_BIT == 8); | |
19427 | if (dwz->str.buffer[str_offset] == '\0') | |
19428 | return NULL; | |
d521ce57 | 19429 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
19430 | } |
19431 | ||
43988095 JK |
19432 | /* Return pointer to string at .debug_str offset as read from BUF. |
19433 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19434 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19435 | ||
d521ce57 TT |
19436 | static const char * |
19437 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
19438 | const struct comp_unit_head *cu_header, |
19439 | unsigned int *bytes_read_ptr) | |
19440 | { | |
19441 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19442 | ||
19443 | return read_indirect_string_at_offset (abfd, str_offset); | |
19444 | } | |
19445 | ||
43988095 JK |
19446 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
19447 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19448 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19449 | ||
19450 | static const char * | |
19451 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
19452 | const struct comp_unit_head *cu_header, | |
19453 | unsigned int *bytes_read_ptr) | |
19454 | { | |
19455 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19456 | ||
19457 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
19458 | } | |
19459 | ||
19460 | ULONGEST | |
d521ce57 | 19461 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 19462 | unsigned int *bytes_read_ptr) |
c906108c | 19463 | { |
12df843f | 19464 | ULONGEST result; |
ce5d95e1 | 19465 | unsigned int num_read; |
870f88f7 | 19466 | int shift; |
c906108c SS |
19467 | unsigned char byte; |
19468 | ||
19469 | result = 0; | |
19470 | shift = 0; | |
19471 | num_read = 0; | |
c906108c SS |
19472 | while (1) |
19473 | { | |
fe1b8b76 | 19474 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19475 | buf++; |
19476 | num_read++; | |
12df843f | 19477 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
19478 | if ((byte & 128) == 0) |
19479 | { | |
19480 | break; | |
19481 | } | |
19482 | shift += 7; | |
19483 | } | |
19484 | *bytes_read_ptr = num_read; | |
19485 | return result; | |
19486 | } | |
19487 | ||
12df843f | 19488 | static LONGEST |
d521ce57 TT |
19489 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
19490 | unsigned int *bytes_read_ptr) | |
c906108c | 19491 | { |
12df843f | 19492 | LONGEST result; |
870f88f7 | 19493 | int shift, num_read; |
c906108c SS |
19494 | unsigned char byte; |
19495 | ||
19496 | result = 0; | |
19497 | shift = 0; | |
c906108c | 19498 | num_read = 0; |
c906108c SS |
19499 | while (1) |
19500 | { | |
fe1b8b76 | 19501 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19502 | buf++; |
19503 | num_read++; | |
12df843f | 19504 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
19505 | shift += 7; |
19506 | if ((byte & 128) == 0) | |
19507 | { | |
19508 | break; | |
19509 | } | |
19510 | } | |
77e0b926 | 19511 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 19512 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
19513 | *bytes_read_ptr = num_read; |
19514 | return result; | |
19515 | } | |
19516 | ||
3019eac3 DE |
19517 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
19518 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
19519 | ADDR_SIZE is the size of addresses from the CU header. */ | |
19520 | ||
19521 | static CORE_ADDR | |
19522 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
19523 | { | |
19524 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19525 | bfd *abfd = objfile->obfd; | |
19526 | const gdb_byte *info_ptr; | |
19527 | ||
19528 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
19529 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
19530 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 19531 | objfile_name (objfile)); |
3019eac3 DE |
19532 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
19533 | error (_("DW_FORM_addr_index pointing outside of " | |
19534 | ".debug_addr section [in module %s]"), | |
4262abfb | 19535 | objfile_name (objfile)); |
3019eac3 DE |
19536 | info_ptr = (dwarf2_per_objfile->addr.buffer |
19537 | + addr_base + addr_index * addr_size); | |
19538 | if (addr_size == 4) | |
19539 | return bfd_get_32 (abfd, info_ptr); | |
19540 | else | |
19541 | return bfd_get_64 (abfd, info_ptr); | |
19542 | } | |
19543 | ||
19544 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
19545 | ||
19546 | static CORE_ADDR | |
19547 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
19548 | { | |
19549 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
19550 | } | |
19551 | ||
19552 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
19553 | ||
19554 | static CORE_ADDR | |
d521ce57 | 19555 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
19556 | unsigned int *bytes_read) |
19557 | { | |
19558 | bfd *abfd = cu->objfile->obfd; | |
19559 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
19560 | ||
19561 | return read_addr_index (cu, addr_index); | |
19562 | } | |
19563 | ||
19564 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
19565 | back to dwarf2_read_addr_index. */ | |
19566 | ||
19567 | struct dwarf2_read_addr_index_data | |
19568 | { | |
19569 | ULONGEST addr_base; | |
19570 | int addr_size; | |
19571 | }; | |
19572 | ||
19573 | /* die_reader_func for dwarf2_read_addr_index. */ | |
19574 | ||
19575 | static void | |
19576 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 19577 | const gdb_byte *info_ptr, |
3019eac3 DE |
19578 | struct die_info *comp_unit_die, |
19579 | int has_children, | |
19580 | void *data) | |
19581 | { | |
19582 | struct dwarf2_cu *cu = reader->cu; | |
19583 | struct dwarf2_read_addr_index_data *aidata = | |
19584 | (struct dwarf2_read_addr_index_data *) data; | |
19585 | ||
19586 | aidata->addr_base = cu->addr_base; | |
19587 | aidata->addr_size = cu->header.addr_size; | |
19588 | } | |
19589 | ||
19590 | /* Given an index in .debug_addr, fetch the value. | |
19591 | NOTE: This can be called during dwarf expression evaluation, | |
19592 | long after the debug information has been read, and thus per_cu->cu | |
19593 | may no longer exist. */ | |
19594 | ||
19595 | CORE_ADDR | |
19596 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
19597 | unsigned int addr_index) | |
19598 | { | |
19599 | struct objfile *objfile = per_cu->objfile; | |
19600 | struct dwarf2_cu *cu = per_cu->cu; | |
19601 | ULONGEST addr_base; | |
19602 | int addr_size; | |
19603 | ||
19604 | /* This is intended to be called from outside this file. */ | |
19605 | dw2_setup (objfile); | |
19606 | ||
19607 | /* We need addr_base and addr_size. | |
19608 | If we don't have PER_CU->cu, we have to get it. | |
19609 | Nasty, but the alternative is storing the needed info in PER_CU, | |
19610 | which at this point doesn't seem justified: it's not clear how frequently | |
19611 | it would get used and it would increase the size of every PER_CU. | |
19612 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
19613 | so we're not in uncharted territory here. | |
19614 | Alas we need to be a bit more complicated as addr_base is contained | |
19615 | in the DIE. | |
19616 | ||
19617 | We don't need to read the entire CU(/TU). | |
19618 | We just need the header and top level die. | |
a1b64ce1 | 19619 | |
3019eac3 | 19620 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 19621 | For now we skip this optimization. */ |
3019eac3 DE |
19622 | |
19623 | if (cu != NULL) | |
19624 | { | |
19625 | addr_base = cu->addr_base; | |
19626 | addr_size = cu->header.addr_size; | |
19627 | } | |
19628 | else | |
19629 | { | |
19630 | struct dwarf2_read_addr_index_data aidata; | |
19631 | ||
a1b64ce1 DE |
19632 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
19633 | we need addr_base. */ | |
19634 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
19635 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
19636 | addr_base = aidata.addr_base; |
19637 | addr_size = aidata.addr_size; | |
19638 | } | |
19639 | ||
19640 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
19641 | } | |
19642 | ||
57d63ce2 DE |
19643 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
19644 | This is only used by the Fission support. */ | |
3019eac3 | 19645 | |
d521ce57 | 19646 | static const char * |
342587c4 | 19647 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
19648 | { |
19649 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 19650 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 19651 | bfd *abfd = objfile->obfd; |
342587c4 | 19652 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
19653 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
19654 | struct dwarf2_section_info *str_offsets_section = | |
19655 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 19656 | const gdb_byte *info_ptr; |
3019eac3 | 19657 | ULONGEST str_offset; |
57d63ce2 | 19658 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 19659 | |
73869dc2 DE |
19660 | dwarf2_read_section (objfile, str_section); |
19661 | dwarf2_read_section (objfile, str_offsets_section); | |
19662 | if (str_section->buffer == NULL) | |
57d63ce2 | 19663 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
19664 | " in CU at offset 0x%x [in module %s]"), |
19665 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 19666 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 19667 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
19668 | " in CU at offset 0x%x [in module %s]"), |
19669 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 19670 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 19671 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
19672 | " section in CU at offset 0x%x [in module %s]"), |
19673 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 19674 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
19675 | + str_index * cu->header.offset_size); |
19676 | if (cu->header.offset_size == 4) | |
19677 | str_offset = bfd_get_32 (abfd, info_ptr); | |
19678 | else | |
19679 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 19680 | if (str_offset >= str_section->size) |
57d63ce2 | 19681 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
19682 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
19683 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 19684 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
19685 | } |
19686 | ||
3019eac3 DE |
19687 | /* Return the length of an LEB128 number in BUF. */ |
19688 | ||
19689 | static int | |
19690 | leb128_size (const gdb_byte *buf) | |
19691 | { | |
19692 | const gdb_byte *begin = buf; | |
19693 | gdb_byte byte; | |
19694 | ||
19695 | while (1) | |
19696 | { | |
19697 | byte = *buf++; | |
19698 | if ((byte & 128) == 0) | |
19699 | return buf - begin; | |
19700 | } | |
19701 | } | |
19702 | ||
c906108c | 19703 | static void |
e142c38c | 19704 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
19705 | { |
19706 | switch (lang) | |
19707 | { | |
19708 | case DW_LANG_C89: | |
76bee0cc | 19709 | case DW_LANG_C99: |
0cfd832f | 19710 | case DW_LANG_C11: |
c906108c | 19711 | case DW_LANG_C: |
d1be3247 | 19712 | case DW_LANG_UPC: |
e142c38c | 19713 | cu->language = language_c; |
c906108c | 19714 | break; |
9c37b5ae | 19715 | case DW_LANG_Java: |
c906108c | 19716 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
19717 | case DW_LANG_C_plus_plus_11: |
19718 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 19719 | cu->language = language_cplus; |
c906108c | 19720 | break; |
6aecb9c2 JB |
19721 | case DW_LANG_D: |
19722 | cu->language = language_d; | |
19723 | break; | |
c906108c SS |
19724 | case DW_LANG_Fortran77: |
19725 | case DW_LANG_Fortran90: | |
b21b22e0 | 19726 | case DW_LANG_Fortran95: |
f7de9aab MW |
19727 | case DW_LANG_Fortran03: |
19728 | case DW_LANG_Fortran08: | |
e142c38c | 19729 | cu->language = language_fortran; |
c906108c | 19730 | break; |
a766d390 DE |
19731 | case DW_LANG_Go: |
19732 | cu->language = language_go; | |
19733 | break; | |
c906108c | 19734 | case DW_LANG_Mips_Assembler: |
e142c38c | 19735 | cu->language = language_asm; |
c906108c SS |
19736 | break; |
19737 | case DW_LANG_Ada83: | |
8aaf0b47 | 19738 | case DW_LANG_Ada95: |
bc5f45f8 JB |
19739 | cu->language = language_ada; |
19740 | break; | |
72019c9c GM |
19741 | case DW_LANG_Modula2: |
19742 | cu->language = language_m2; | |
19743 | break; | |
fe8e67fd PM |
19744 | case DW_LANG_Pascal83: |
19745 | cu->language = language_pascal; | |
19746 | break; | |
22566fbd DJ |
19747 | case DW_LANG_ObjC: |
19748 | cu->language = language_objc; | |
19749 | break; | |
c44af4eb TT |
19750 | case DW_LANG_Rust: |
19751 | case DW_LANG_Rust_old: | |
19752 | cu->language = language_rust; | |
19753 | break; | |
c906108c SS |
19754 | case DW_LANG_Cobol74: |
19755 | case DW_LANG_Cobol85: | |
c906108c | 19756 | default: |
e142c38c | 19757 | cu->language = language_minimal; |
c906108c SS |
19758 | break; |
19759 | } | |
e142c38c | 19760 | cu->language_defn = language_def (cu->language); |
c906108c SS |
19761 | } |
19762 | ||
19763 | /* Return the named attribute or NULL if not there. */ | |
19764 | ||
19765 | static struct attribute * | |
e142c38c | 19766 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 19767 | { |
a48e046c | 19768 | for (;;) |
c906108c | 19769 | { |
a48e046c TT |
19770 | unsigned int i; |
19771 | struct attribute *spec = NULL; | |
19772 | ||
19773 | for (i = 0; i < die->num_attrs; ++i) | |
19774 | { | |
19775 | if (die->attrs[i].name == name) | |
19776 | return &die->attrs[i]; | |
19777 | if (die->attrs[i].name == DW_AT_specification | |
19778 | || die->attrs[i].name == DW_AT_abstract_origin) | |
19779 | spec = &die->attrs[i]; | |
19780 | } | |
19781 | ||
19782 | if (!spec) | |
19783 | break; | |
c906108c | 19784 | |
f2f0e013 | 19785 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 19786 | } |
c5aa993b | 19787 | |
c906108c SS |
19788 | return NULL; |
19789 | } | |
19790 | ||
348e048f DE |
19791 | /* Return the named attribute or NULL if not there, |
19792 | but do not follow DW_AT_specification, etc. | |
19793 | This is for use in contexts where we're reading .debug_types dies. | |
19794 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
19795 | back up the chain, and we want to go down. */ | |
19796 | ||
19797 | static struct attribute * | |
45e58e77 | 19798 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
19799 | { |
19800 | unsigned int i; | |
19801 | ||
19802 | for (i = 0; i < die->num_attrs; ++i) | |
19803 | if (die->attrs[i].name == name) | |
19804 | return &die->attrs[i]; | |
19805 | ||
19806 | return NULL; | |
19807 | } | |
19808 | ||
7d45c7c3 KB |
19809 | /* Return the string associated with a string-typed attribute, or NULL if it |
19810 | is either not found or is of an incorrect type. */ | |
19811 | ||
19812 | static const char * | |
19813 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
19814 | { | |
19815 | struct attribute *attr; | |
19816 | const char *str = NULL; | |
19817 | ||
19818 | attr = dwarf2_attr (die, name, cu); | |
19819 | ||
19820 | if (attr != NULL) | |
19821 | { | |
43988095 | 19822 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
19823 | || attr->form == DW_FORM_string |
19824 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 19825 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
19826 | str = DW_STRING (attr); |
19827 | else | |
19828 | complaint (&symfile_complaints, | |
19829 | _("string type expected for attribute %s for " | |
19830 | "DIE at 0x%x in module %s"), | |
9c541725 | 19831 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
19832 | objfile_name (cu->objfile)); |
19833 | } | |
19834 | ||
19835 | return str; | |
19836 | } | |
19837 | ||
05cf31d1 JB |
19838 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
19839 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 19840 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
19841 | |
19842 | static int | |
19843 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
19844 | { | |
19845 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
19846 | ||
19847 | return (attr && DW_UNSND (attr)); | |
19848 | } | |
19849 | ||
3ca72b44 | 19850 | static int |
e142c38c | 19851 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 19852 | { |
05cf31d1 JB |
19853 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
19854 | which value is non-zero. However, we have to be careful with | |
19855 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
19856 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
19857 | end up accidently finding a declaration attribute that belongs | |
19858 | to a different DIE referenced by the specification attribute, | |
19859 | even though the given DIE does not have a declaration attribute. */ | |
19860 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
19861 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
19862 | } |
19863 | ||
63d06c5c | 19864 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 19865 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
19866 | containing the return value on output. If there is no |
19867 | specification, but there is an abstract origin, that is | |
19868 | returned. */ | |
63d06c5c DC |
19869 | |
19870 | static struct die_info * | |
f2f0e013 | 19871 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 19872 | { |
f2f0e013 DJ |
19873 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
19874 | *spec_cu); | |
63d06c5c | 19875 | |
edb3359d DJ |
19876 | if (spec_attr == NULL) |
19877 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
19878 | ||
63d06c5c DC |
19879 | if (spec_attr == NULL) |
19880 | return NULL; | |
19881 | else | |
f2f0e013 | 19882 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 19883 | } |
c906108c | 19884 | |
527f3840 JK |
19885 | /* Stub for free_line_header to match void * callback types. */ |
19886 | ||
19887 | static void | |
19888 | free_line_header_voidp (void *arg) | |
19889 | { | |
9a3c8263 | 19890 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 19891 | |
fff8551c | 19892 | delete lh; |
527f3840 JK |
19893 | } |
19894 | ||
fff8551c PA |
19895 | void |
19896 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 19897 | { |
27e0867f | 19898 | if (dwarf_line_debug >= 2) |
fff8551c PA |
19899 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
19900 | include_dirs.size () + 1, include_dir); | |
27e0867f | 19901 | |
fff8551c | 19902 | include_dirs.push_back (include_dir); |
debd256d | 19903 | } |
6e70227d | 19904 | |
fff8551c PA |
19905 | void |
19906 | line_header::add_file_name (const char *name, | |
ecfb656c | 19907 | dir_index d_index, |
fff8551c PA |
19908 | unsigned int mod_time, |
19909 | unsigned int length) | |
debd256d | 19910 | { |
27e0867f DE |
19911 | if (dwarf_line_debug >= 2) |
19912 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 19913 | (unsigned) file_names.size () + 1, name); |
27e0867f | 19914 | |
ecfb656c | 19915 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 19916 | } |
6e70227d | 19917 | |
83769d0b | 19918 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
19919 | |
19920 | static struct dwarf2_section_info * | |
19921 | get_debug_line_section (struct dwarf2_cu *cu) | |
19922 | { | |
19923 | struct dwarf2_section_info *section; | |
19924 | ||
19925 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
19926 | DWO file. */ | |
19927 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
19928 | section = &cu->dwo_unit->dwo_file->sections.line; | |
19929 | else if (cu->per_cu->is_dwz) | |
19930 | { | |
19931 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
19932 | ||
19933 | section = &dwz->line; | |
19934 | } | |
19935 | else | |
19936 | section = &dwarf2_per_objfile->line; | |
19937 | ||
19938 | return section; | |
19939 | } | |
19940 | ||
43988095 JK |
19941 | /* Read directory or file name entry format, starting with byte of |
19942 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
19943 | entries count and the entries themselves in the described entry | |
19944 | format. */ | |
19945 | ||
19946 | static void | |
19947 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
19948 | struct line_header *lh, | |
19949 | const struct comp_unit_head *cu_header, | |
19950 | void (*callback) (struct line_header *lh, | |
19951 | const char *name, | |
ecfb656c | 19952 | dir_index d_index, |
43988095 JK |
19953 | unsigned int mod_time, |
19954 | unsigned int length)) | |
19955 | { | |
19956 | gdb_byte format_count, formati; | |
19957 | ULONGEST data_count, datai; | |
19958 | const gdb_byte *buf = *bufp; | |
19959 | const gdb_byte *format_header_data; | |
43988095 JK |
19960 | unsigned int bytes_read; |
19961 | ||
19962 | format_count = read_1_byte (abfd, buf); | |
19963 | buf += 1; | |
19964 | format_header_data = buf; | |
19965 | for (formati = 0; formati < format_count; formati++) | |
19966 | { | |
19967 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19968 | buf += bytes_read; | |
19969 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19970 | buf += bytes_read; | |
19971 | } | |
19972 | ||
19973 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19974 | buf += bytes_read; | |
19975 | for (datai = 0; datai < data_count; datai++) | |
19976 | { | |
19977 | const gdb_byte *format = format_header_data; | |
19978 | struct file_entry fe; | |
19979 | ||
43988095 JK |
19980 | for (formati = 0; formati < format_count; formati++) |
19981 | { | |
ecfb656c | 19982 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19983 | format += bytes_read; |
43988095 | 19984 | |
ecfb656c | 19985 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19986 | format += bytes_read; |
ecfb656c PA |
19987 | |
19988 | gdb::optional<const char *> string; | |
19989 | gdb::optional<unsigned int> uint; | |
19990 | ||
43988095 JK |
19991 | switch (form) |
19992 | { | |
19993 | case DW_FORM_string: | |
ecfb656c | 19994 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
19995 | buf += bytes_read; |
19996 | break; | |
19997 | ||
19998 | case DW_FORM_line_strp: | |
ecfb656c PA |
19999 | string.emplace (read_indirect_line_string (abfd, buf, |
20000 | cu_header, | |
20001 | &bytes_read)); | |
43988095 JK |
20002 | buf += bytes_read; |
20003 | break; | |
20004 | ||
20005 | case DW_FORM_data1: | |
ecfb656c | 20006 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
20007 | buf += 1; |
20008 | break; | |
20009 | ||
20010 | case DW_FORM_data2: | |
ecfb656c | 20011 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
20012 | buf += 2; |
20013 | break; | |
20014 | ||
20015 | case DW_FORM_data4: | |
ecfb656c | 20016 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
20017 | buf += 4; |
20018 | break; | |
20019 | ||
20020 | case DW_FORM_data8: | |
ecfb656c | 20021 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
20022 | buf += 8; |
20023 | break; | |
20024 | ||
20025 | case DW_FORM_udata: | |
ecfb656c | 20026 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
20027 | buf += bytes_read; |
20028 | break; | |
20029 | ||
20030 | case DW_FORM_block: | |
20031 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
20032 | current GDB. */ | |
20033 | break; | |
20034 | } | |
ecfb656c PA |
20035 | |
20036 | switch (content_type) | |
20037 | { | |
20038 | case DW_LNCT_path: | |
20039 | if (string.has_value ()) | |
20040 | fe.name = *string; | |
20041 | break; | |
20042 | case DW_LNCT_directory_index: | |
20043 | if (uint.has_value ()) | |
20044 | fe.d_index = (dir_index) *uint; | |
20045 | break; | |
20046 | case DW_LNCT_timestamp: | |
20047 | if (uint.has_value ()) | |
20048 | fe.mod_time = *uint; | |
20049 | break; | |
20050 | case DW_LNCT_size: | |
20051 | if (uint.has_value ()) | |
20052 | fe.length = *uint; | |
20053 | break; | |
20054 | case DW_LNCT_MD5: | |
20055 | break; | |
20056 | default: | |
20057 | complaint (&symfile_complaints, | |
20058 | _("Unknown format content type %s"), | |
20059 | pulongest (content_type)); | |
20060 | } | |
43988095 JK |
20061 | } |
20062 | ||
ecfb656c | 20063 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
20064 | } |
20065 | ||
20066 | *bufp = buf; | |
20067 | } | |
20068 | ||
debd256d | 20069 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 20070 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 20071 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
20072 | Returns NULL if there is a problem reading the header, e.g., if it |
20073 | has a version we don't understand. | |
debd256d JB |
20074 | |
20075 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
20076 | the returned object point into the dwarf line section buffer, |
20077 | and must not be freed. */ | |
ae2de4f8 | 20078 | |
fff8551c | 20079 | static line_header_up |
9c541725 | 20080 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 20081 | { |
d521ce57 | 20082 | const gdb_byte *line_ptr; |
c764a876 | 20083 | unsigned int bytes_read, offset_size; |
debd256d | 20084 | int i; |
d521ce57 | 20085 | const char *cur_dir, *cur_file; |
3019eac3 DE |
20086 | struct dwarf2_section_info *section; |
20087 | bfd *abfd; | |
20088 | ||
36586728 | 20089 | section = get_debug_line_section (cu); |
3019eac3 DE |
20090 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
20091 | if (section->buffer == NULL) | |
debd256d | 20092 | { |
3019eac3 DE |
20093 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
20094 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
20095 | else | |
20096 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
20097 | return 0; |
20098 | } | |
20099 | ||
fceca515 DE |
20100 | /* We can't do this until we know the section is non-empty. |
20101 | Only then do we know we have such a section. */ | |
a32a8923 | 20102 | abfd = get_section_bfd_owner (section); |
fceca515 | 20103 | |
a738430d MK |
20104 | /* Make sure that at least there's room for the total_length field. |
20105 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 20106 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 20107 | { |
4d3c2250 | 20108 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20109 | return 0; |
20110 | } | |
20111 | ||
fff8551c | 20112 | line_header_up lh (new line_header ()); |
debd256d | 20113 | |
9c541725 | 20114 | lh->sect_off = sect_off; |
527f3840 JK |
20115 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
20116 | ||
9c541725 | 20117 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 20118 | |
a738430d | 20119 | /* Read in the header. */ |
6e70227d | 20120 | lh->total_length = |
c764a876 DE |
20121 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
20122 | &bytes_read, &offset_size); | |
debd256d | 20123 | line_ptr += bytes_read; |
3019eac3 | 20124 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 20125 | { |
4d3c2250 | 20126 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20127 | return 0; |
20128 | } | |
20129 | lh->statement_program_end = line_ptr + lh->total_length; | |
20130 | lh->version = read_2_bytes (abfd, line_ptr); | |
20131 | line_ptr += 2; | |
43988095 | 20132 | if (lh->version > 5) |
cd366ee8 DE |
20133 | { |
20134 | /* This is a version we don't understand. The format could have | |
20135 | changed in ways we don't handle properly so just punt. */ | |
20136 | complaint (&symfile_complaints, | |
20137 | _("unsupported version in .debug_line section")); | |
20138 | return NULL; | |
20139 | } | |
43988095 JK |
20140 | if (lh->version >= 5) |
20141 | { | |
20142 | gdb_byte segment_selector_size; | |
20143 | ||
20144 | /* Skip address size. */ | |
20145 | read_1_byte (abfd, line_ptr); | |
20146 | line_ptr += 1; | |
20147 | ||
20148 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
20149 | line_ptr += 1; | |
20150 | if (segment_selector_size != 0) | |
20151 | { | |
20152 | complaint (&symfile_complaints, | |
20153 | _("unsupported segment selector size %u " | |
20154 | "in .debug_line section"), | |
20155 | segment_selector_size); | |
20156 | return NULL; | |
20157 | } | |
20158 | } | |
c764a876 DE |
20159 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
20160 | line_ptr += offset_size; | |
debd256d JB |
20161 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
20162 | line_ptr += 1; | |
2dc7f7b3 TT |
20163 | if (lh->version >= 4) |
20164 | { | |
20165 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
20166 | line_ptr += 1; | |
20167 | } | |
20168 | else | |
20169 | lh->maximum_ops_per_instruction = 1; | |
20170 | ||
20171 | if (lh->maximum_ops_per_instruction == 0) | |
20172 | { | |
20173 | lh->maximum_ops_per_instruction = 1; | |
20174 | complaint (&symfile_complaints, | |
3e43a32a MS |
20175 | _("invalid maximum_ops_per_instruction " |
20176 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
20177 | } |
20178 | ||
debd256d JB |
20179 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
20180 | line_ptr += 1; | |
20181 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
20182 | line_ptr += 1; | |
20183 | lh->line_range = read_1_byte (abfd, line_ptr); | |
20184 | line_ptr += 1; | |
20185 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
20186 | line_ptr += 1; | |
fff8551c | 20187 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
20188 | |
20189 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
20190 | for (i = 1; i < lh->opcode_base; ++i) | |
20191 | { | |
20192 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
20193 | line_ptr += 1; | |
20194 | } | |
20195 | ||
43988095 | 20196 | if (lh->version >= 5) |
debd256d | 20197 | { |
43988095 | 20198 | /* Read directory table. */ |
fff8551c PA |
20199 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
20200 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 20201 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20202 | unsigned int length) |
20203 | { | |
20204 | lh->add_include_dir (name); | |
20205 | }); | |
debd256d | 20206 | |
43988095 | 20207 | /* Read file name table. */ |
fff8551c PA |
20208 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
20209 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 20210 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20211 | unsigned int length) |
20212 | { | |
ecfb656c | 20213 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 20214 | }); |
43988095 JK |
20215 | } |
20216 | else | |
debd256d | 20217 | { |
43988095 JK |
20218 | /* Read directory table. */ |
20219 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20220 | { | |
20221 | line_ptr += bytes_read; | |
fff8551c | 20222 | lh->add_include_dir (cur_dir); |
43988095 | 20223 | } |
debd256d JB |
20224 | line_ptr += bytes_read; |
20225 | ||
43988095 JK |
20226 | /* Read file name table. */ |
20227 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20228 | { | |
ecfb656c PA |
20229 | unsigned int mod_time, length; |
20230 | dir_index d_index; | |
43988095 JK |
20231 | |
20232 | line_ptr += bytes_read; | |
ecfb656c | 20233 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
20234 | line_ptr += bytes_read; |
20235 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20236 | line_ptr += bytes_read; | |
20237 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20238 | line_ptr += bytes_read; | |
20239 | ||
ecfb656c | 20240 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
20241 | } |
20242 | line_ptr += bytes_read; | |
debd256d | 20243 | } |
6e70227d | 20244 | lh->statement_program_start = line_ptr; |
debd256d | 20245 | |
3019eac3 | 20246 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 20247 | complaint (&symfile_complaints, |
3e43a32a MS |
20248 | _("line number info header doesn't " |
20249 | "fit in `.debug_line' section")); | |
debd256d | 20250 | |
debd256d JB |
20251 | return lh; |
20252 | } | |
c906108c | 20253 | |
c6da4cef DE |
20254 | /* Subroutine of dwarf_decode_lines to simplify it. |
20255 | Return the file name of the psymtab for included file FILE_INDEX | |
20256 | in line header LH of PST. | |
20257 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
20258 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
20259 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
20260 | ||
20261 | The function creates dangling cleanup registration. */ | |
c6da4cef | 20262 | |
d521ce57 | 20263 | static const char * |
c6da4cef DE |
20264 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
20265 | const struct partial_symtab *pst, | |
20266 | const char *comp_dir) | |
20267 | { | |
8c43009f | 20268 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
20269 | const char *include_name = fe.name; |
20270 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
20271 | const char *pst_filename; |
20272 | char *copied_name = NULL; | |
c6da4cef DE |
20273 | int file_is_pst; |
20274 | ||
8c43009f | 20275 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
20276 | |
20277 | if (!IS_ABSOLUTE_PATH (include_name) | |
20278 | && (dir_name != NULL || comp_dir != NULL)) | |
20279 | { | |
20280 | /* Avoid creating a duplicate psymtab for PST. | |
20281 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
20282 | Before we do the comparison, however, we need to account | |
20283 | for DIR_NAME and COMP_DIR. | |
20284 | First prepend dir_name (if non-NULL). If we still don't | |
20285 | have an absolute path prepend comp_dir (if non-NULL). | |
20286 | However, the directory we record in the include-file's | |
20287 | psymtab does not contain COMP_DIR (to match the | |
20288 | corresponding symtab(s)). | |
20289 | ||
20290 | Example: | |
20291 | ||
20292 | bash$ cd /tmp | |
20293 | bash$ gcc -g ./hello.c | |
20294 | include_name = "hello.c" | |
20295 | dir_name = "." | |
20296 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
20297 | DW_AT_name = "./hello.c" |
20298 | ||
20299 | */ | |
c6da4cef DE |
20300 | |
20301 | if (dir_name != NULL) | |
20302 | { | |
d521ce57 TT |
20303 | char *tem = concat (dir_name, SLASH_STRING, |
20304 | include_name, (char *)NULL); | |
20305 | ||
20306 | make_cleanup (xfree, tem); | |
20307 | include_name = tem; | |
c6da4cef | 20308 | include_name_to_compare = include_name; |
c6da4cef DE |
20309 | } |
20310 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
20311 | { | |
d521ce57 TT |
20312 | char *tem = concat (comp_dir, SLASH_STRING, |
20313 | include_name, (char *)NULL); | |
20314 | ||
20315 | make_cleanup (xfree, tem); | |
20316 | include_name_to_compare = tem; | |
c6da4cef DE |
20317 | } |
20318 | } | |
20319 | ||
20320 | pst_filename = pst->filename; | |
20321 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
20322 | { | |
72b9f47f TT |
20323 | copied_name = concat (pst->dirname, SLASH_STRING, |
20324 | pst_filename, (char *)NULL); | |
20325 | pst_filename = copied_name; | |
c6da4cef DE |
20326 | } |
20327 | ||
1e3fad37 | 20328 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 20329 | |
72b9f47f TT |
20330 | if (copied_name != NULL) |
20331 | xfree (copied_name); | |
c6da4cef DE |
20332 | |
20333 | if (file_is_pst) | |
20334 | return NULL; | |
20335 | return include_name; | |
20336 | } | |
20337 | ||
d9b3de22 DE |
20338 | /* State machine to track the state of the line number program. */ |
20339 | ||
6f77053d | 20340 | class lnp_state_machine |
d9b3de22 | 20341 | { |
6f77053d PA |
20342 | public: |
20343 | /* Initialize a machine state for the start of a line number | |
20344 | program. */ | |
20345 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
20346 | ||
8c43009f PA |
20347 | file_entry *current_file () |
20348 | { | |
20349 | /* lh->file_names is 0-based, but the file name numbers in the | |
20350 | statement program are 1-based. */ | |
6f77053d PA |
20351 | return m_line_header->file_name_at (m_file); |
20352 | } | |
20353 | ||
20354 | /* Record the line in the state machine. END_SEQUENCE is true if | |
20355 | we're processing the end of a sequence. */ | |
20356 | void record_line (bool end_sequence); | |
20357 | ||
20358 | /* Check address and if invalid nop-out the rest of the lines in this | |
20359 | sequence. */ | |
20360 | void check_line_address (struct dwarf2_cu *cu, | |
20361 | const gdb_byte *line_ptr, | |
20362 | CORE_ADDR lowpc, CORE_ADDR address); | |
20363 | ||
20364 | void handle_set_discriminator (unsigned int discriminator) | |
20365 | { | |
20366 | m_discriminator = discriminator; | |
20367 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
20368 | } | |
20369 | ||
20370 | /* Handle DW_LNE_set_address. */ | |
20371 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
20372 | { | |
20373 | m_op_index = 0; | |
20374 | address += baseaddr; | |
20375 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
20376 | } | |
20377 | ||
20378 | /* Handle DW_LNS_advance_pc. */ | |
20379 | void handle_advance_pc (CORE_ADDR adjust); | |
20380 | ||
20381 | /* Handle a special opcode. */ | |
20382 | void handle_special_opcode (unsigned char op_code); | |
20383 | ||
20384 | /* Handle DW_LNS_advance_line. */ | |
20385 | void handle_advance_line (int line_delta) | |
20386 | { | |
20387 | advance_line (line_delta); | |
20388 | } | |
20389 | ||
20390 | /* Handle DW_LNS_set_file. */ | |
20391 | void handle_set_file (file_name_index file); | |
20392 | ||
20393 | /* Handle DW_LNS_negate_stmt. */ | |
20394 | void handle_negate_stmt () | |
20395 | { | |
20396 | m_is_stmt = !m_is_stmt; | |
20397 | } | |
20398 | ||
20399 | /* Handle DW_LNS_const_add_pc. */ | |
20400 | void handle_const_add_pc (); | |
20401 | ||
20402 | /* Handle DW_LNS_fixed_advance_pc. */ | |
20403 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
20404 | { | |
20405 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20406 | m_op_index = 0; | |
20407 | } | |
20408 | ||
20409 | /* Handle DW_LNS_copy. */ | |
20410 | void handle_copy () | |
20411 | { | |
20412 | record_line (false); | |
20413 | m_discriminator = 0; | |
20414 | } | |
20415 | ||
20416 | /* Handle DW_LNE_end_sequence. */ | |
20417 | void handle_end_sequence () | |
20418 | { | |
20419 | m_record_line_callback = ::record_line; | |
20420 | } | |
20421 | ||
20422 | private: | |
20423 | /* Advance the line by LINE_DELTA. */ | |
20424 | void advance_line (int line_delta) | |
20425 | { | |
20426 | m_line += line_delta; | |
20427 | ||
20428 | if (line_delta != 0) | |
20429 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
20430 | } |
20431 | ||
6f77053d PA |
20432 | gdbarch *m_gdbarch; |
20433 | ||
20434 | /* True if we're recording lines. | |
20435 | Otherwise we're building partial symtabs and are just interested in | |
20436 | finding include files mentioned by the line number program. */ | |
20437 | bool m_record_lines_p; | |
20438 | ||
8c43009f | 20439 | /* The line number header. */ |
6f77053d | 20440 | line_header *m_line_header; |
8c43009f | 20441 | |
6f77053d PA |
20442 | /* These are part of the standard DWARF line number state machine, |
20443 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 20444 | |
6f77053d | 20445 | unsigned char m_op_index = 0; |
8c43009f | 20446 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
20447 | file_name_index m_file = (file_name_index) 1; |
20448 | unsigned int m_line = 1; | |
20449 | ||
20450 | /* These are initialized in the constructor. */ | |
20451 | ||
20452 | CORE_ADDR m_address; | |
20453 | bool m_is_stmt; | |
20454 | unsigned int m_discriminator; | |
d9b3de22 DE |
20455 | |
20456 | /* Additional bits of state we need to track. */ | |
20457 | ||
20458 | /* The last file that we called dwarf2_start_subfile for. | |
20459 | This is only used for TLLs. */ | |
6f77053d | 20460 | unsigned int m_last_file = 0; |
d9b3de22 | 20461 | /* The last file a line number was recorded for. */ |
6f77053d | 20462 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
20463 | |
20464 | /* The function to call to record a line. */ | |
6f77053d | 20465 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
20466 | |
20467 | /* The last line number that was recorded, used to coalesce | |
20468 | consecutive entries for the same line. This can happen, for | |
20469 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
20470 | unsigned int m_last_line = 0; |
20471 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 20472 | }; |
d9b3de22 | 20473 | |
6f77053d PA |
20474 | void |
20475 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
20476 | { | |
20477 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
20478 | / m_line_header->maximum_ops_per_instruction) | |
20479 | * m_line_header->minimum_instruction_length); | |
20480 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20481 | m_op_index = ((m_op_index + adjust) | |
20482 | % m_line_header->maximum_ops_per_instruction); | |
20483 | } | |
d9b3de22 | 20484 | |
6f77053d PA |
20485 | void |
20486 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 20487 | { |
6f77053d PA |
20488 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
20489 | CORE_ADDR addr_adj = (((m_op_index | |
20490 | + (adj_opcode / m_line_header->line_range)) | |
20491 | / m_line_header->maximum_ops_per_instruction) | |
20492 | * m_line_header->minimum_instruction_length); | |
20493 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20494 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
20495 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 20496 | |
6f77053d PA |
20497 | int line_delta = (m_line_header->line_base |
20498 | + (adj_opcode % m_line_header->line_range)); | |
20499 | advance_line (line_delta); | |
20500 | record_line (false); | |
20501 | m_discriminator = 0; | |
20502 | } | |
d9b3de22 | 20503 | |
6f77053d PA |
20504 | void |
20505 | lnp_state_machine::handle_set_file (file_name_index file) | |
20506 | { | |
20507 | m_file = file; | |
20508 | ||
20509 | const file_entry *fe = current_file (); | |
20510 | if (fe == NULL) | |
20511 | dwarf2_debug_line_missing_file_complaint (); | |
20512 | else if (m_record_lines_p) | |
20513 | { | |
20514 | const char *dir = fe->include_dir (m_line_header); | |
20515 | ||
20516 | m_last_subfile = current_subfile; | |
20517 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
20518 | dwarf2_start_subfile (fe->name, dir); | |
20519 | } | |
20520 | } | |
20521 | ||
20522 | void | |
20523 | lnp_state_machine::handle_const_add_pc () | |
20524 | { | |
20525 | CORE_ADDR adjust | |
20526 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
20527 | ||
20528 | CORE_ADDR addr_adj | |
20529 | = (((m_op_index + adjust) | |
20530 | / m_line_header->maximum_ops_per_instruction) | |
20531 | * m_line_header->minimum_instruction_length); | |
20532 | ||
20533 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20534 | m_op_index = ((m_op_index + adjust) | |
20535 | % m_line_header->maximum_ops_per_instruction); | |
20536 | } | |
d9b3de22 | 20537 | |
c91513d8 PP |
20538 | /* Ignore this record_line request. */ |
20539 | ||
20540 | static void | |
20541 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
20542 | { | |
20543 | return; | |
20544 | } | |
20545 | ||
a05a36a5 DE |
20546 | /* Return non-zero if we should add LINE to the line number table. |
20547 | LINE is the line to add, LAST_LINE is the last line that was added, | |
20548 | LAST_SUBFILE is the subfile for LAST_LINE. | |
20549 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
20550 | had a non-zero discriminator. | |
20551 | ||
20552 | We have to be careful in the presence of discriminators. | |
20553 | E.g., for this line: | |
20554 | ||
20555 | for (i = 0; i < 100000; i++); | |
20556 | ||
20557 | clang can emit four line number entries for that one line, | |
20558 | each with a different discriminator. | |
20559 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
20560 | ||
20561 | However, we want gdb to coalesce all four entries into one. | |
20562 | Otherwise the user could stepi into the middle of the line and | |
20563 | gdb would get confused about whether the pc really was in the | |
20564 | middle of the line. | |
20565 | ||
20566 | Things are further complicated by the fact that two consecutive | |
20567 | line number entries for the same line is a heuristic used by gcc | |
20568 | to denote the end of the prologue. So we can't just discard duplicate | |
20569 | entries, we have to be selective about it. The heuristic we use is | |
20570 | that we only collapse consecutive entries for the same line if at least | |
20571 | one of those entries has a non-zero discriminator. PR 17276. | |
20572 | ||
20573 | Note: Addresses in the line number state machine can never go backwards | |
20574 | within one sequence, thus this coalescing is ok. */ | |
20575 | ||
20576 | static int | |
20577 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
20578 | int line_has_non_zero_discriminator, | |
20579 | struct subfile *last_subfile) | |
20580 | { | |
20581 | if (current_subfile != last_subfile) | |
20582 | return 1; | |
20583 | if (line != last_line) | |
20584 | return 1; | |
20585 | /* Same line for the same file that we've seen already. | |
20586 | As a last check, for pr 17276, only record the line if the line | |
20587 | has never had a non-zero discriminator. */ | |
20588 | if (!line_has_non_zero_discriminator) | |
20589 | return 1; | |
20590 | return 0; | |
20591 | } | |
20592 | ||
252a6764 DE |
20593 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
20594 | in the line table of subfile SUBFILE. */ | |
20595 | ||
20596 | static void | |
d9b3de22 DE |
20597 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
20598 | unsigned int line, CORE_ADDR address, | |
20599 | record_line_ftype p_record_line) | |
252a6764 DE |
20600 | { |
20601 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
20602 | ||
27e0867f DE |
20603 | if (dwarf_line_debug) |
20604 | { | |
20605 | fprintf_unfiltered (gdb_stdlog, | |
20606 | "Recording line %u, file %s, address %s\n", | |
20607 | line, lbasename (subfile->name), | |
20608 | paddress (gdbarch, address)); | |
20609 | } | |
20610 | ||
d5962de5 | 20611 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
20612 | } |
20613 | ||
20614 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
20615 | Mark the end of a set of line number records. | |
d9b3de22 | 20616 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
20617 | If SUBFILE is NULL the request is ignored. */ |
20618 | ||
20619 | static void | |
20620 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
20621 | CORE_ADDR address, record_line_ftype p_record_line) | |
20622 | { | |
27e0867f DE |
20623 | if (subfile == NULL) |
20624 | return; | |
20625 | ||
20626 | if (dwarf_line_debug) | |
20627 | { | |
20628 | fprintf_unfiltered (gdb_stdlog, | |
20629 | "Finishing current line, file %s, address %s\n", | |
20630 | lbasename (subfile->name), | |
20631 | paddress (gdbarch, address)); | |
20632 | } | |
20633 | ||
d9b3de22 DE |
20634 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
20635 | } | |
20636 | ||
6f77053d PA |
20637 | void |
20638 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 20639 | { |
d9b3de22 DE |
20640 | if (dwarf_line_debug) |
20641 | { | |
20642 | fprintf_unfiltered (gdb_stdlog, | |
20643 | "Processing actual line %u: file %u," | |
20644 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
20645 | m_line, to_underlying (m_file), |
20646 | paddress (m_gdbarch, m_address), | |
20647 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
20648 | } |
20649 | ||
6f77053d | 20650 | file_entry *fe = current_file (); |
8c43009f PA |
20651 | |
20652 | if (fe == NULL) | |
d9b3de22 DE |
20653 | dwarf2_debug_line_missing_file_complaint (); |
20654 | /* For now we ignore lines not starting on an instruction boundary. | |
20655 | But not when processing end_sequence for compatibility with the | |
20656 | previous version of the code. */ | |
6f77053d | 20657 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 20658 | { |
8c43009f | 20659 | fe->included_p = 1; |
6f77053d | 20660 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 20661 | { |
6f77053d | 20662 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 20663 | { |
6f77053d PA |
20664 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
20665 | m_address, m_record_line_callback); | |
d9b3de22 DE |
20666 | } |
20667 | ||
20668 | if (!end_sequence) | |
20669 | { | |
6f77053d PA |
20670 | if (dwarf_record_line_p (m_line, m_last_line, |
20671 | m_line_has_non_zero_discriminator, | |
20672 | m_last_subfile)) | |
d9b3de22 | 20673 | { |
6f77053d PA |
20674 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
20675 | m_line, m_address, | |
20676 | m_record_line_callback); | |
d9b3de22 | 20677 | } |
6f77053d PA |
20678 | m_last_subfile = current_subfile; |
20679 | m_last_line = m_line; | |
d9b3de22 DE |
20680 | } |
20681 | } | |
20682 | } | |
20683 | } | |
20684 | ||
6f77053d PA |
20685 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
20686 | bool record_lines_p) | |
d9b3de22 | 20687 | { |
6f77053d PA |
20688 | m_gdbarch = arch; |
20689 | m_record_lines_p = record_lines_p; | |
20690 | m_line_header = lh; | |
d9b3de22 | 20691 | |
6f77053d | 20692 | m_record_line_callback = ::record_line; |
d9b3de22 | 20693 | |
d9b3de22 DE |
20694 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
20695 | was a line entry for it so that the backend has a chance to adjust it | |
20696 | and also record it in case it needs it. This is currently used by MIPS | |
20697 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
20698 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
20699 | m_is_stmt = lh->default_is_stmt; | |
20700 | m_discriminator = 0; | |
252a6764 DE |
20701 | } |
20702 | ||
6f77053d PA |
20703 | void |
20704 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
20705 | const gdb_byte *line_ptr, | |
20706 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
20707 | { |
20708 | /* If address < lowpc then it's not a usable value, it's outside the | |
20709 | pc range of the CU. However, we restrict the test to only address | |
20710 | values of zero to preserve GDB's previous behaviour which is to | |
20711 | handle the specific case of a function being GC'd by the linker. */ | |
20712 | ||
20713 | if (address == 0 && address < lowpc) | |
20714 | { | |
20715 | /* This line table is for a function which has been | |
20716 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
20717 | ||
20718 | struct objfile *objfile = cu->objfile; | |
20719 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
20720 | ||
20721 | complaint (&symfile_complaints, | |
20722 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
20723 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
20724 | m_record_line_callback = noop_record_line; |
20725 | /* Note: record_line_callback is left as noop_record_line until | |
20726 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
20727 | } |
20728 | } | |
20729 | ||
f3f5162e | 20730 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
20731 | Process the line number information in LH. |
20732 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
20733 | program in order to set included_p for every referenced header. */ | |
debd256d | 20734 | |
c906108c | 20735 | static void |
43f3e411 DE |
20736 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
20737 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 20738 | { |
d521ce57 TT |
20739 | const gdb_byte *line_ptr, *extended_end; |
20740 | const gdb_byte *line_end; | |
a8c50c1f | 20741 | unsigned int bytes_read, extended_len; |
699ca60a | 20742 | unsigned char op_code, extended_op; |
e142c38c DJ |
20743 | CORE_ADDR baseaddr; |
20744 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 20745 | bfd *abfd = objfile->obfd; |
fbf65064 | 20746 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
20747 | /* True if we're recording line info (as opposed to building partial |
20748 | symtabs and just interested in finding include files mentioned by | |
20749 | the line number program). */ | |
20750 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
20751 | |
20752 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 20753 | |
debd256d JB |
20754 | line_ptr = lh->statement_program_start; |
20755 | line_end = lh->statement_program_end; | |
c906108c SS |
20756 | |
20757 | /* Read the statement sequences until there's nothing left. */ | |
20758 | while (line_ptr < line_end) | |
20759 | { | |
6f77053d PA |
20760 | /* The DWARF line number program state machine. Reset the state |
20761 | machine at the start of each sequence. */ | |
20762 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
20763 | bool end_sequence = false; | |
d9b3de22 | 20764 | |
8c43009f | 20765 | if (record_lines_p) |
c906108c | 20766 | { |
8c43009f PA |
20767 | /* Start a subfile for the current file of the state |
20768 | machine. */ | |
20769 | const file_entry *fe = state_machine.current_file (); | |
20770 | ||
20771 | if (fe != NULL) | |
20772 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
20773 | } |
20774 | ||
a738430d | 20775 | /* Decode the table. */ |
d9b3de22 | 20776 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
20777 | { |
20778 | op_code = read_1_byte (abfd, line_ptr); | |
20779 | line_ptr += 1; | |
9aa1fe7e | 20780 | |
debd256d | 20781 | if (op_code >= lh->opcode_base) |
6e70227d | 20782 | { |
8e07a239 | 20783 | /* Special opcode. */ |
6f77053d | 20784 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
20785 | } |
20786 | else switch (op_code) | |
c906108c SS |
20787 | { |
20788 | case DW_LNS_extended_op: | |
3e43a32a MS |
20789 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
20790 | &bytes_read); | |
473b7be6 | 20791 | line_ptr += bytes_read; |
a8c50c1f | 20792 | extended_end = line_ptr + extended_len; |
c906108c SS |
20793 | extended_op = read_1_byte (abfd, line_ptr); |
20794 | line_ptr += 1; | |
20795 | switch (extended_op) | |
20796 | { | |
20797 | case DW_LNE_end_sequence: | |
6f77053d PA |
20798 | state_machine.handle_end_sequence (); |
20799 | end_sequence = true; | |
c906108c SS |
20800 | break; |
20801 | case DW_LNE_set_address: | |
d9b3de22 DE |
20802 | { |
20803 | CORE_ADDR address | |
20804 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 20805 | line_ptr += bytes_read; |
6f77053d PA |
20806 | |
20807 | state_machine.check_line_address (cu, line_ptr, | |
20808 | lowpc, address); | |
20809 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 20810 | } |
c906108c SS |
20811 | break; |
20812 | case DW_LNE_define_file: | |
debd256d | 20813 | { |
d521ce57 | 20814 | const char *cur_file; |
ecfb656c PA |
20815 | unsigned int mod_time, length; |
20816 | dir_index dindex; | |
6e70227d | 20817 | |
3e43a32a MS |
20818 | cur_file = read_direct_string (abfd, line_ptr, |
20819 | &bytes_read); | |
debd256d | 20820 | line_ptr += bytes_read; |
ecfb656c | 20821 | dindex = (dir_index) |
debd256d JB |
20822 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
20823 | line_ptr += bytes_read; | |
20824 | mod_time = | |
20825 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20826 | line_ptr += bytes_read; | |
20827 | length = | |
20828 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20829 | line_ptr += bytes_read; | |
ecfb656c | 20830 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 20831 | } |
c906108c | 20832 | break; |
d0c6ba3d | 20833 | case DW_LNE_set_discriminator: |
6f77053d PA |
20834 | { |
20835 | /* The discriminator is not interesting to the | |
20836 | debugger; just ignore it. We still need to | |
20837 | check its value though: | |
20838 | if there are consecutive entries for the same | |
20839 | (non-prologue) line we want to coalesce them. | |
20840 | PR 17276. */ | |
20841 | unsigned int discr | |
20842 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20843 | line_ptr += bytes_read; | |
20844 | ||
20845 | state_machine.handle_set_discriminator (discr); | |
20846 | } | |
d0c6ba3d | 20847 | break; |
c906108c | 20848 | default: |
4d3c2250 | 20849 | complaint (&symfile_complaints, |
e2e0b3e5 | 20850 | _("mangled .debug_line section")); |
debd256d | 20851 | return; |
c906108c | 20852 | } |
a8c50c1f DJ |
20853 | /* Make sure that we parsed the extended op correctly. If e.g. |
20854 | we expected a different address size than the producer used, | |
20855 | we may have read the wrong number of bytes. */ | |
20856 | if (line_ptr != extended_end) | |
20857 | { | |
20858 | complaint (&symfile_complaints, | |
20859 | _("mangled .debug_line section")); | |
20860 | return; | |
20861 | } | |
c906108c SS |
20862 | break; |
20863 | case DW_LNS_copy: | |
6f77053d | 20864 | state_machine.handle_copy (); |
c906108c SS |
20865 | break; |
20866 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
20867 | { |
20868 | CORE_ADDR adjust | |
20869 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 20870 | line_ptr += bytes_read; |
6f77053d PA |
20871 | |
20872 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 20873 | } |
c906108c SS |
20874 | break; |
20875 | case DW_LNS_advance_line: | |
a05a36a5 DE |
20876 | { |
20877 | int line_delta | |
20878 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 20879 | line_ptr += bytes_read; |
6f77053d PA |
20880 | |
20881 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 20882 | } |
c906108c SS |
20883 | break; |
20884 | case DW_LNS_set_file: | |
d9b3de22 | 20885 | { |
6f77053d | 20886 | file_name_index file |
ecfb656c PA |
20887 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
20888 | &bytes_read); | |
d9b3de22 | 20889 | line_ptr += bytes_read; |
8c43009f | 20890 | |
6f77053d | 20891 | state_machine.handle_set_file (file); |
d9b3de22 | 20892 | } |
c906108c SS |
20893 | break; |
20894 | case DW_LNS_set_column: | |
0ad93d4f | 20895 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
20896 | line_ptr += bytes_read; |
20897 | break; | |
20898 | case DW_LNS_negate_stmt: | |
6f77053d | 20899 | state_machine.handle_negate_stmt (); |
c906108c SS |
20900 | break; |
20901 | case DW_LNS_set_basic_block: | |
c906108c | 20902 | break; |
c2c6d25f JM |
20903 | /* Add to the address register of the state machine the |
20904 | address increment value corresponding to special opcode | |
a738430d MK |
20905 | 255. I.e., this value is scaled by the minimum |
20906 | instruction length since special opcode 255 would have | |
b021a221 | 20907 | scaled the increment. */ |
c906108c | 20908 | case DW_LNS_const_add_pc: |
6f77053d | 20909 | state_machine.handle_const_add_pc (); |
c906108c SS |
20910 | break; |
20911 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 20912 | { |
6f77053d | 20913 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 20914 | line_ptr += 2; |
6f77053d PA |
20915 | |
20916 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 20917 | } |
c906108c | 20918 | break; |
9aa1fe7e | 20919 | default: |
a738430d MK |
20920 | { |
20921 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 20922 | int i; |
a738430d | 20923 | |
debd256d | 20924 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
20925 | { |
20926 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20927 | line_ptr += bytes_read; | |
20928 | } | |
20929 | } | |
c906108c SS |
20930 | } |
20931 | } | |
d9b3de22 DE |
20932 | |
20933 | if (!end_sequence) | |
20934 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
20935 | ||
20936 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
20937 | in which case we still finish recording the last line). */ | |
6f77053d | 20938 | state_machine.record_line (true); |
c906108c | 20939 | } |
f3f5162e DE |
20940 | } |
20941 | ||
20942 | /* Decode the Line Number Program (LNP) for the given line_header | |
20943 | structure and CU. The actual information extracted and the type | |
20944 | of structures created from the LNP depends on the value of PST. | |
20945 | ||
20946 | 1. If PST is NULL, then this procedure uses the data from the program | |
20947 | to create all necessary symbol tables, and their linetables. | |
20948 | ||
20949 | 2. If PST is not NULL, this procedure reads the program to determine | |
20950 | the list of files included by the unit represented by PST, and | |
20951 | builds all the associated partial symbol tables. | |
20952 | ||
20953 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
20954 | It is used for relative paths in the line table. | |
20955 | NOTE: When processing partial symtabs (pst != NULL), | |
20956 | comp_dir == pst->dirname. | |
20957 | ||
20958 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
20959 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
20960 | symtab we don't use it in the name of the psymtabs we create. | |
20961 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
20962 | A good testcase for this is mb-inline.exp. |
20963 | ||
527f3840 JK |
20964 | LOWPC is the lowest address in CU (or 0 if not known). |
20965 | ||
20966 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
20967 | for its PC<->lines mapping information. Otherwise only the filename | |
20968 | table is read in. */ | |
f3f5162e DE |
20969 | |
20970 | static void | |
20971 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 20972 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 20973 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
20974 | { |
20975 | struct objfile *objfile = cu->objfile; | |
20976 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 20977 | |
527f3840 JK |
20978 | if (decode_mapping) |
20979 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
20980 | |
20981 | if (decode_for_pst_p) | |
20982 | { | |
20983 | int file_index; | |
20984 | ||
20985 | /* Now that we're done scanning the Line Header Program, we can | |
20986 | create the psymtab of each included file. */ | |
fff8551c | 20987 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
20988 | if (lh->file_names[file_index].included_p == 1) |
20989 | { | |
d521ce57 | 20990 | const char *include_name = |
c6da4cef DE |
20991 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
20992 | if (include_name != NULL) | |
aaa75496 JB |
20993 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
20994 | } | |
20995 | } | |
cb1df416 DJ |
20996 | else |
20997 | { | |
20998 | /* Make sure a symtab is created for every file, even files | |
20999 | which contain only variables (i.e. no code with associated | |
21000 | line numbers). */ | |
43f3e411 | 21001 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 21002 | int i; |
cb1df416 | 21003 | |
fff8551c | 21004 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 21005 | { |
8c43009f | 21006 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 21007 | |
8c43009f | 21008 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 21009 | |
cb1df416 | 21010 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
21011 | { |
21012 | current_subfile->symtab | |
21013 | = allocate_symtab (cust, current_subfile->name); | |
21014 | } | |
8c43009f | 21015 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
21016 | } |
21017 | } | |
c906108c SS |
21018 | } |
21019 | ||
21020 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
21021 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 21022 | or NULL if not known. |
c906108c SS |
21023 | This routine tries to keep line numbers from identical absolute and |
21024 | relative file names in a common subfile. | |
21025 | ||
21026 | Using the `list' example from the GDB testsuite, which resides in | |
21027 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
21028 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
21029 | ||
c5aa993b | 21030 | DW_AT_name: /srcdir/list0.c |
4d663531 | 21031 | DW_AT_comp_dir: /compdir |
357e46e7 | 21032 | files.files[0].name: list0.h |
c5aa993b | 21033 | files.files[0].dir: /srcdir |
357e46e7 | 21034 | files.files[1].name: list0.c |
c5aa993b | 21035 | files.files[1].dir: /srcdir |
c906108c SS |
21036 | |
21037 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
21038 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
21039 | start_subfile will ensure that this happens provided that we pass the | |
21040 | concatenation of files.files[1].dir and files.files[1].name as the | |
21041 | subfile's name. */ | |
c906108c SS |
21042 | |
21043 | static void | |
4d663531 | 21044 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 21045 | { |
d521ce57 | 21046 | char *copy = NULL; |
4f1520fb | 21047 | |
4d663531 | 21048 | /* In order not to lose the line information directory, |
4f1520fb FR |
21049 | we concatenate it to the filename when it makes sense. |
21050 | Note that the Dwarf3 standard says (speaking of filenames in line | |
21051 | information): ``The directory index is ignored for file names | |
21052 | that represent full path names''. Thus ignoring dirname in the | |
21053 | `else' branch below isn't an issue. */ | |
c906108c | 21054 | |
d5166ae1 | 21055 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
21056 | { |
21057 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
21058 | filename = copy; | |
21059 | } | |
c906108c | 21060 | |
4d663531 | 21061 | start_subfile (filename); |
4f1520fb | 21062 | |
d521ce57 TT |
21063 | if (copy != NULL) |
21064 | xfree (copy); | |
c906108c SS |
21065 | } |
21066 | ||
f4dc4d17 DE |
21067 | /* Start a symtab for DWARF. |
21068 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
21069 | ||
43f3e411 | 21070 | static struct compunit_symtab * |
f4dc4d17 | 21071 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 21072 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 21073 | { |
43f3e411 | 21074 | struct compunit_symtab *cust |
5ffa0793 | 21075 | = start_symtab (cu->objfile, name, comp_dir, low_pc, cu->language); |
43f3e411 | 21076 | |
f4dc4d17 DE |
21077 | record_debugformat ("DWARF 2"); |
21078 | record_producer (cu->producer); | |
21079 | ||
21080 | /* We assume that we're processing GCC output. */ | |
21081 | processing_gcc_compilation = 2; | |
21082 | ||
4d4ec4e5 | 21083 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
21084 | |
21085 | return cust; | |
f4dc4d17 DE |
21086 | } |
21087 | ||
4c2df51b DJ |
21088 | static void |
21089 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 21090 | struct dwarf2_cu *cu) |
4c2df51b | 21091 | { |
e7c27a73 DJ |
21092 | struct objfile *objfile = cu->objfile; |
21093 | struct comp_unit_head *cu_header = &cu->header; | |
21094 | ||
4c2df51b DJ |
21095 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
21096 | code here to turn a symbol with DW_AT_external and a | |
21097 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
21098 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
21099 | with some versions of binutils) where shared libraries could have | |
21100 | relocations against symbols in their debug information - the | |
21101 | minimal symbol would have the right address, but the debug info | |
21102 | would not. It's no longer necessary, because we will explicitly | |
21103 | apply relocations when we read in the debug information now. */ | |
21104 | ||
21105 | /* A DW_AT_location attribute with no contents indicates that a | |
21106 | variable has been optimized away. */ | |
21107 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
21108 | { | |
f1e6e072 | 21109 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
21110 | return; |
21111 | } | |
21112 | ||
21113 | /* Handle one degenerate form of location expression specially, to | |
21114 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
21115 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
21116 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
21117 | |
21118 | if (attr_form_is_block (attr) | |
3019eac3 DE |
21119 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
21120 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
21121 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
21122 | && (DW_BLOCK (attr)->size | |
21123 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 21124 | { |
891d2f0b | 21125 | unsigned int dummy; |
4c2df51b | 21126 | |
3019eac3 DE |
21127 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
21128 | SYMBOL_VALUE_ADDRESS (sym) = | |
21129 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
21130 | else | |
21131 | SYMBOL_VALUE_ADDRESS (sym) = | |
21132 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 21133 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
21134 | fixup_symbol_section (sym, objfile); |
21135 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
21136 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
21137 | return; |
21138 | } | |
21139 | ||
21140 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
21141 | expression evaluator, and use LOC_COMPUTED only when necessary | |
21142 | (i.e. when the value of a register or memory location is | |
21143 | referenced, or a thread-local block, etc.). Then again, it might | |
21144 | not be worthwhile. I'm assuming that it isn't unless performance | |
21145 | or memory numbers show me otherwise. */ | |
21146 | ||
f1e6e072 | 21147 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 21148 | |
f1e6e072 | 21149 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 21150 | cu->has_loclist = 1; |
4c2df51b DJ |
21151 | } |
21152 | ||
c906108c SS |
21153 | /* Given a pointer to a DWARF information entry, figure out if we need |
21154 | to make a symbol table entry for it, and if so, create a new entry | |
21155 | and return a pointer to it. | |
21156 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
21157 | used the passed type. |
21158 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
21159 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
21160 | |
21161 | static struct symbol * | |
34eaf542 TT |
21162 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
21163 | struct symbol *space) | |
c906108c | 21164 | { |
e7c27a73 | 21165 | struct objfile *objfile = cu->objfile; |
3e29f34a | 21166 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 21167 | struct symbol *sym = NULL; |
15d034d0 | 21168 | const char *name; |
c906108c SS |
21169 | struct attribute *attr = NULL; |
21170 | struct attribute *attr2 = NULL; | |
e142c38c | 21171 | CORE_ADDR baseaddr; |
e37fd15a SW |
21172 | struct pending **list_to_add = NULL; |
21173 | ||
edb3359d | 21174 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
21175 | |
21176 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 21177 | |
94af9270 | 21178 | name = dwarf2_name (die, cu); |
c906108c SS |
21179 | if (name) |
21180 | { | |
94af9270 | 21181 | const char *linkagename; |
34eaf542 | 21182 | int suppress_add = 0; |
94af9270 | 21183 | |
34eaf542 TT |
21184 | if (space) |
21185 | sym = space; | |
21186 | else | |
e623cf5d | 21187 | sym = allocate_symbol (objfile); |
c906108c | 21188 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
21189 | |
21190 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 21191 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
21192 | linkagename = dwarf2_physname (name, die, cu); |
21193 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 21194 | |
f55ee35c JK |
21195 | /* Fortran does not have mangling standard and the mangling does differ |
21196 | between gfortran, iFort etc. */ | |
21197 | if (cu->language == language_fortran | |
b250c185 | 21198 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 21199 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 21200 | dwarf2_full_name (name, die, cu), |
29df156d | 21201 | NULL); |
f55ee35c | 21202 | |
c906108c | 21203 | /* Default assumptions. |
c5aa993b | 21204 | Use the passed type or decode it from the die. */ |
176620f1 | 21205 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 21206 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
21207 | if (type != NULL) |
21208 | SYMBOL_TYPE (sym) = type; | |
21209 | else | |
e7c27a73 | 21210 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
21211 | attr = dwarf2_attr (die, |
21212 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
21213 | cu); | |
c906108c SS |
21214 | if (attr) |
21215 | { | |
21216 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
21217 | } | |
cb1df416 | 21218 | |
edb3359d DJ |
21219 | attr = dwarf2_attr (die, |
21220 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
21221 | cu); | |
cb1df416 DJ |
21222 | if (attr) |
21223 | { | |
ecfb656c | 21224 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 21225 | struct file_entry *fe; |
9a619af0 | 21226 | |
ecfb656c PA |
21227 | if (cu->line_header != NULL) |
21228 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
21229 | else |
21230 | fe = NULL; | |
21231 | ||
21232 | if (fe == NULL) | |
cb1df416 DJ |
21233 | complaint (&symfile_complaints, |
21234 | _("file index out of range")); | |
8c43009f PA |
21235 | else |
21236 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
21237 | } |
21238 | ||
c906108c SS |
21239 | switch (die->tag) |
21240 | { | |
21241 | case DW_TAG_label: | |
e142c38c | 21242 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 21243 | if (attr) |
3e29f34a MR |
21244 | { |
21245 | CORE_ADDR addr; | |
21246 | ||
21247 | addr = attr_value_as_address (attr); | |
21248 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
21249 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
21250 | } | |
0f5238ed TT |
21251 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
21252 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 21253 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 21254 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
21255 | break; |
21256 | case DW_TAG_subprogram: | |
21257 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21258 | finish_block. */ | |
f1e6e072 | 21259 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 21260 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
21261 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
21262 | || cu->language == language_ada) | |
c906108c | 21263 | { |
2cfa0c8d JB |
21264 | /* Subprograms marked external are stored as a global symbol. |
21265 | Ada subprograms, whether marked external or not, are always | |
21266 | stored as a global symbol, because we want to be able to | |
21267 | access them globally. For instance, we want to be able | |
21268 | to break on a nested subprogram without having to | |
21269 | specify the context. */ | |
e37fd15a | 21270 | list_to_add = &global_symbols; |
c906108c SS |
21271 | } |
21272 | else | |
21273 | { | |
e37fd15a | 21274 | list_to_add = cu->list_in_scope; |
c906108c SS |
21275 | } |
21276 | break; | |
edb3359d DJ |
21277 | case DW_TAG_inlined_subroutine: |
21278 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21279 | finish_block. */ | |
f1e6e072 | 21280 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 21281 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 21282 | list_to_add = cu->list_in_scope; |
edb3359d | 21283 | break; |
34eaf542 TT |
21284 | case DW_TAG_template_value_param: |
21285 | suppress_add = 1; | |
21286 | /* Fall through. */ | |
72929c62 | 21287 | case DW_TAG_constant: |
c906108c | 21288 | case DW_TAG_variable: |
254e6b9e | 21289 | case DW_TAG_member: |
0963b4bd MS |
21290 | /* Compilation with minimal debug info may result in |
21291 | variables with missing type entries. Change the | |
21292 | misleading `void' type to something sensible. */ | |
c906108c | 21293 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 21294 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 21295 | |
e142c38c | 21296 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
21297 | /* In the case of DW_TAG_member, we should only be called for |
21298 | static const members. */ | |
21299 | if (die->tag == DW_TAG_member) | |
21300 | { | |
3863f96c DE |
21301 | /* dwarf2_add_field uses die_is_declaration, |
21302 | so we do the same. */ | |
254e6b9e DE |
21303 | gdb_assert (die_is_declaration (die, cu)); |
21304 | gdb_assert (attr); | |
21305 | } | |
c906108c SS |
21306 | if (attr) |
21307 | { | |
e7c27a73 | 21308 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 21309 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 21310 | if (!suppress_add) |
34eaf542 TT |
21311 | { |
21312 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 21313 | list_to_add = &global_symbols; |
34eaf542 | 21314 | else |
e37fd15a | 21315 | list_to_add = cu->list_in_scope; |
34eaf542 | 21316 | } |
c906108c SS |
21317 | break; |
21318 | } | |
e142c38c | 21319 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
21320 | if (attr) |
21321 | { | |
e7c27a73 | 21322 | var_decode_location (attr, sym, cu); |
e142c38c | 21323 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
21324 | |
21325 | /* Fortran explicitly imports any global symbols to the local | |
21326 | scope by DW_TAG_common_block. */ | |
21327 | if (cu->language == language_fortran && die->parent | |
21328 | && die->parent->tag == DW_TAG_common_block) | |
21329 | attr2 = NULL; | |
21330 | ||
caac4577 JG |
21331 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21332 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
21333 | && !dwarf2_per_objfile->has_section_at_zero) | |
21334 | { | |
21335 | /* When a static variable is eliminated by the linker, | |
21336 | the corresponding debug information is not stripped | |
21337 | out, but the variable address is set to null; | |
21338 | do not add such variables into symbol table. */ | |
21339 | } | |
21340 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 21341 | { |
f55ee35c JK |
21342 | /* Workaround gfortran PR debug/40040 - it uses |
21343 | DW_AT_location for variables in -fPIC libraries which may | |
21344 | get overriden by other libraries/executable and get | |
21345 | a different address. Resolve it by the minimal symbol | |
21346 | which may come from inferior's executable using copy | |
21347 | relocation. Make this workaround only for gfortran as for | |
21348 | other compilers GDB cannot guess the minimal symbol | |
21349 | Fortran mangling kind. */ | |
21350 | if (cu->language == language_fortran && die->parent | |
21351 | && die->parent->tag == DW_TAG_module | |
21352 | && cu->producer | |
28586665 | 21353 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 21354 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 21355 | |
1c809c68 TT |
21356 | /* A variable with DW_AT_external is never static, |
21357 | but it may be block-scoped. */ | |
21358 | list_to_add = (cu->list_in_scope == &file_symbols | |
21359 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 21360 | } |
c906108c | 21361 | else |
e37fd15a | 21362 | list_to_add = cu->list_in_scope; |
c906108c SS |
21363 | } |
21364 | else | |
21365 | { | |
21366 | /* We do not know the address of this symbol. | |
c5aa993b JM |
21367 | If it is an external symbol and we have type information |
21368 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
21369 | The address of the variable will then be determined from | |
21370 | the minimal symbol table whenever the variable is | |
21371 | referenced. */ | |
e142c38c | 21372 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
21373 | |
21374 | /* Fortran explicitly imports any global symbols to the local | |
21375 | scope by DW_TAG_common_block. */ | |
21376 | if (cu->language == language_fortran && die->parent | |
21377 | && die->parent->tag == DW_TAG_common_block) | |
21378 | { | |
21379 | /* SYMBOL_CLASS doesn't matter here because | |
21380 | read_common_block is going to reset it. */ | |
21381 | if (!suppress_add) | |
21382 | list_to_add = cu->list_in_scope; | |
21383 | } | |
21384 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
21385 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 21386 | { |
0fe7935b DJ |
21387 | /* A variable with DW_AT_external is never static, but it |
21388 | may be block-scoped. */ | |
21389 | list_to_add = (cu->list_in_scope == &file_symbols | |
21390 | ? &global_symbols : cu->list_in_scope); | |
21391 | ||
f1e6e072 | 21392 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 21393 | } |
442ddf59 JK |
21394 | else if (!die_is_declaration (die, cu)) |
21395 | { | |
21396 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
21397 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
21398 | if (!suppress_add) |
21399 | list_to_add = cu->list_in_scope; | |
442ddf59 | 21400 | } |
c906108c SS |
21401 | } |
21402 | break; | |
21403 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
21404 | /* If we are inside a function, mark this as an argument. If |
21405 | not, we might be looking at an argument to an inlined function | |
21406 | when we do not have enough information to show inlined frames; | |
21407 | pretend it's a local variable in that case so that the user can | |
21408 | still see it. */ | |
21409 | if (context_stack_depth > 0 | |
21410 | && context_stack[context_stack_depth - 1].name != NULL) | |
21411 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 21412 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
21413 | if (attr) |
21414 | { | |
e7c27a73 | 21415 | var_decode_location (attr, sym, cu); |
c906108c | 21416 | } |
e142c38c | 21417 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
21418 | if (attr) |
21419 | { | |
e7c27a73 | 21420 | dwarf2_const_value (attr, sym, cu); |
c906108c | 21421 | } |
f346a30d | 21422 | |
e37fd15a | 21423 | list_to_add = cu->list_in_scope; |
c906108c SS |
21424 | break; |
21425 | case DW_TAG_unspecified_parameters: | |
21426 | /* From varargs functions; gdb doesn't seem to have any | |
21427 | interest in this information, so just ignore it for now. | |
21428 | (FIXME?) */ | |
21429 | break; | |
34eaf542 TT |
21430 | case DW_TAG_template_type_param: |
21431 | suppress_add = 1; | |
21432 | /* Fall through. */ | |
c906108c | 21433 | case DW_TAG_class_type: |
680b30c7 | 21434 | case DW_TAG_interface_type: |
c906108c SS |
21435 | case DW_TAG_structure_type: |
21436 | case DW_TAG_union_type: | |
72019c9c | 21437 | case DW_TAG_set_type: |
c906108c | 21438 | case DW_TAG_enumeration_type: |
f1e6e072 | 21439 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21440 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 21441 | |
63d06c5c | 21442 | { |
9c37b5ae | 21443 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
21444 | really ever be static objects: otherwise, if you try |
21445 | to, say, break of a class's method and you're in a file | |
21446 | which doesn't mention that class, it won't work unless | |
21447 | the check for all static symbols in lookup_symbol_aux | |
21448 | saves you. See the OtherFileClass tests in | |
21449 | gdb.c++/namespace.exp. */ | |
21450 | ||
e37fd15a | 21451 | if (!suppress_add) |
34eaf542 | 21452 | { |
34eaf542 | 21453 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 21454 | && cu->language == language_cplus |
34eaf542 | 21455 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 21456 | |
64382290 | 21457 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 21458 | ... }" also defines a typedef for "foo". */ |
64382290 | 21459 | if (cu->language == language_cplus |
45280282 | 21460 | || cu->language == language_ada |
c44af4eb TT |
21461 | || cu->language == language_d |
21462 | || cu->language == language_rust) | |
64382290 TT |
21463 | { |
21464 | /* The symbol's name is already allocated along | |
21465 | with this objfile, so we don't need to | |
21466 | duplicate it for the type. */ | |
21467 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
21468 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
21469 | } | |
63d06c5c DC |
21470 | } |
21471 | } | |
c906108c SS |
21472 | break; |
21473 | case DW_TAG_typedef: | |
f1e6e072 | 21474 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 21475 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21476 | list_to_add = cu->list_in_scope; |
63d06c5c | 21477 | break; |
c906108c | 21478 | case DW_TAG_base_type: |
a02abb62 | 21479 | case DW_TAG_subrange_type: |
f1e6e072 | 21480 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21481 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21482 | list_to_add = cu->list_in_scope; |
c906108c SS |
21483 | break; |
21484 | case DW_TAG_enumerator: | |
e142c38c | 21485 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
21486 | if (attr) |
21487 | { | |
e7c27a73 | 21488 | dwarf2_const_value (attr, sym, cu); |
c906108c | 21489 | } |
63d06c5c DC |
21490 | { |
21491 | /* NOTE: carlton/2003-11-10: See comment above in the | |
21492 | DW_TAG_class_type, etc. block. */ | |
21493 | ||
e142c38c | 21494 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 21495 | && cu->language == language_cplus |
e142c38c | 21496 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 21497 | } |
c906108c | 21498 | break; |
74921315 | 21499 | case DW_TAG_imported_declaration: |
5c4e30ca | 21500 | case DW_TAG_namespace: |
f1e6e072 | 21501 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 21502 | list_to_add = &global_symbols; |
5c4e30ca | 21503 | break; |
530e8392 KB |
21504 | case DW_TAG_module: |
21505 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
21506 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
21507 | list_to_add = &global_symbols; | |
21508 | break; | |
4357ac6c | 21509 | case DW_TAG_common_block: |
f1e6e072 | 21510 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
21511 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
21512 | add_symbol_to_list (sym, cu->list_in_scope); | |
21513 | break; | |
c906108c SS |
21514 | default: |
21515 | /* Not a tag we recognize. Hopefully we aren't processing | |
21516 | trash data, but since we must specifically ignore things | |
21517 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 21518 | this point. */ |
e2e0b3e5 | 21519 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 21520 | dwarf_tag_name (die->tag)); |
c906108c SS |
21521 | break; |
21522 | } | |
df8a16a1 | 21523 | |
e37fd15a SW |
21524 | if (suppress_add) |
21525 | { | |
21526 | sym->hash_next = objfile->template_symbols; | |
21527 | objfile->template_symbols = sym; | |
21528 | list_to_add = NULL; | |
21529 | } | |
21530 | ||
21531 | if (list_to_add != NULL) | |
21532 | add_symbol_to_list (sym, list_to_add); | |
21533 | ||
df8a16a1 DJ |
21534 | /* For the benefit of old versions of GCC, check for anonymous |
21535 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 21536 | if (!cu->processing_has_namespace_info |
94af9270 | 21537 | && cu->language == language_cplus) |
a10964d1 | 21538 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
21539 | } |
21540 | return (sym); | |
21541 | } | |
21542 | ||
34eaf542 TT |
21543 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
21544 | ||
21545 | static struct symbol * | |
21546 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
21547 | { | |
21548 | return new_symbol_full (die, type, cu, NULL); | |
21549 | } | |
21550 | ||
98bfdba5 PA |
21551 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
21552 | zero-extend it as appropriate for the symbol's type. The DWARF | |
21553 | standard (v4) is not entirely clear about the meaning of using | |
21554 | DW_FORM_dataN for a constant with a signed type, where the type is | |
21555 | wider than the data. The conclusion of a discussion on the DWARF | |
21556 | list was that this is unspecified. We choose to always zero-extend | |
21557 | because that is the interpretation long in use by GCC. */ | |
c906108c | 21558 | |
98bfdba5 | 21559 | static gdb_byte * |
ff39bb5e | 21560 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 21561 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 21562 | { |
e7c27a73 | 21563 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
21564 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
21565 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
21566 | LONGEST l = DW_UNSND (attr); |
21567 | ||
21568 | if (bits < sizeof (*value) * 8) | |
21569 | { | |
21570 | l &= ((LONGEST) 1 << bits) - 1; | |
21571 | *value = l; | |
21572 | } | |
21573 | else if (bits == sizeof (*value) * 8) | |
21574 | *value = l; | |
21575 | else | |
21576 | { | |
224c3ddb | 21577 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
21578 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
21579 | return bytes; | |
21580 | } | |
21581 | ||
21582 | return NULL; | |
21583 | } | |
21584 | ||
21585 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
21586 | the value does not fit in *VALUE, set *BYTES - either already | |
21587 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
21588 | or, set *BATON, if we translated the constant to a location | |
21589 | expression. */ | |
21590 | ||
21591 | static void | |
ff39bb5e | 21592 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
21593 | const char *name, struct obstack *obstack, |
21594 | struct dwarf2_cu *cu, | |
d521ce57 | 21595 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
21596 | struct dwarf2_locexpr_baton **baton) |
21597 | { | |
21598 | struct objfile *objfile = cu->objfile; | |
21599 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 21600 | struct dwarf_block *blk; |
98bfdba5 PA |
21601 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
21602 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21603 | ||
21604 | *value = 0; | |
21605 | *bytes = NULL; | |
21606 | *baton = NULL; | |
c906108c SS |
21607 | |
21608 | switch (attr->form) | |
21609 | { | |
21610 | case DW_FORM_addr: | |
3019eac3 | 21611 | case DW_FORM_GNU_addr_index: |
ac56253d | 21612 | { |
ac56253d TT |
21613 | gdb_byte *data; |
21614 | ||
98bfdba5 PA |
21615 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
21616 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 21617 | cu_header->addr_size, |
98bfdba5 | 21618 | TYPE_LENGTH (type)); |
ac56253d TT |
21619 | /* Symbols of this form are reasonably rare, so we just |
21620 | piggyback on the existing location code rather than writing | |
21621 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 21622 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
21623 | (*baton)->per_cu = cu->per_cu; |
21624 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 21625 | |
98bfdba5 | 21626 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 21627 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 21628 | (*baton)->data = data; |
ac56253d TT |
21629 | |
21630 | data[0] = DW_OP_addr; | |
21631 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
21632 | byte_order, DW_ADDR (attr)); | |
21633 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 21634 | } |
c906108c | 21635 | break; |
4ac36638 | 21636 | case DW_FORM_string: |
93b5768b | 21637 | case DW_FORM_strp: |
3019eac3 | 21638 | case DW_FORM_GNU_str_index: |
36586728 | 21639 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
21640 | /* DW_STRING is already allocated on the objfile obstack, point |
21641 | directly to it. */ | |
d521ce57 | 21642 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 21643 | break; |
c906108c SS |
21644 | case DW_FORM_block1: |
21645 | case DW_FORM_block2: | |
21646 | case DW_FORM_block4: | |
21647 | case DW_FORM_block: | |
2dc7f7b3 | 21648 | case DW_FORM_exprloc: |
0224619f | 21649 | case DW_FORM_data16: |
c906108c | 21650 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
21651 | if (TYPE_LENGTH (type) != blk->size) |
21652 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
21653 | TYPE_LENGTH (type)); | |
21654 | *bytes = blk->data; | |
c906108c | 21655 | break; |
2df3850c JM |
21656 | |
21657 | /* The DW_AT_const_value attributes are supposed to carry the | |
21658 | symbol's value "represented as it would be on the target | |
21659 | architecture." By the time we get here, it's already been | |
21660 | converted to host endianness, so we just need to sign- or | |
21661 | zero-extend it as appropriate. */ | |
21662 | case DW_FORM_data1: | |
3aef2284 | 21663 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 21664 | break; |
c906108c | 21665 | case DW_FORM_data2: |
3aef2284 | 21666 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 21667 | break; |
c906108c | 21668 | case DW_FORM_data4: |
3aef2284 | 21669 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 21670 | break; |
c906108c | 21671 | case DW_FORM_data8: |
3aef2284 | 21672 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
21673 | break; |
21674 | ||
c906108c | 21675 | case DW_FORM_sdata: |
663c44ac | 21676 | case DW_FORM_implicit_const: |
98bfdba5 | 21677 | *value = DW_SND (attr); |
2df3850c JM |
21678 | break; |
21679 | ||
c906108c | 21680 | case DW_FORM_udata: |
98bfdba5 | 21681 | *value = DW_UNSND (attr); |
c906108c | 21682 | break; |
2df3850c | 21683 | |
c906108c | 21684 | default: |
4d3c2250 | 21685 | complaint (&symfile_complaints, |
e2e0b3e5 | 21686 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 21687 | dwarf_form_name (attr->form)); |
98bfdba5 | 21688 | *value = 0; |
c906108c SS |
21689 | break; |
21690 | } | |
21691 | } | |
21692 | ||
2df3850c | 21693 | |
98bfdba5 PA |
21694 | /* Copy constant value from an attribute to a symbol. */ |
21695 | ||
2df3850c | 21696 | static void |
ff39bb5e | 21697 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 21698 | struct dwarf2_cu *cu) |
2df3850c | 21699 | { |
98bfdba5 | 21700 | struct objfile *objfile = cu->objfile; |
12df843f | 21701 | LONGEST value; |
d521ce57 | 21702 | const gdb_byte *bytes; |
98bfdba5 | 21703 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 21704 | |
98bfdba5 PA |
21705 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
21706 | SYMBOL_PRINT_NAME (sym), | |
21707 | &objfile->objfile_obstack, cu, | |
21708 | &value, &bytes, &baton); | |
2df3850c | 21709 | |
98bfdba5 PA |
21710 | if (baton != NULL) |
21711 | { | |
98bfdba5 | 21712 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 21713 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
21714 | } |
21715 | else if (bytes != NULL) | |
21716 | { | |
21717 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 21718 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
21719 | } |
21720 | else | |
21721 | { | |
21722 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 21723 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 21724 | } |
2df3850c JM |
21725 | } |
21726 | ||
c906108c SS |
21727 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
21728 | ||
21729 | static struct type * | |
e7c27a73 | 21730 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21731 | { |
c906108c | 21732 | struct attribute *type_attr; |
c906108c | 21733 | |
e142c38c | 21734 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
21735 | if (!type_attr) |
21736 | { | |
21737 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 21738 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 21739 | } |
348e048f | 21740 | |
673bfd45 | 21741 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21742 | } |
21743 | ||
b4ba55a1 JB |
21744 | /* True iff CU's producer generates GNAT Ada auxiliary information |
21745 | that allows to find parallel types through that information instead | |
21746 | of having to do expensive parallel lookups by type name. */ | |
21747 | ||
21748 | static int | |
21749 | need_gnat_info (struct dwarf2_cu *cu) | |
21750 | { | |
21751 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
21752 | of GNAT produces this auxiliary information, without any indication | |
21753 | that it is produced. Part of enhancing the FSF version of GNAT | |
21754 | to produce that information will be to put in place an indicator | |
21755 | that we can use in order to determine whether the descriptive type | |
21756 | info is available or not. One suggestion that has been made is | |
21757 | to use a new attribute, attached to the CU die. For now, assume | |
21758 | that the descriptive type info is not available. */ | |
21759 | return 0; | |
21760 | } | |
21761 | ||
b4ba55a1 JB |
21762 | /* Return the auxiliary type of the die in question using its |
21763 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
21764 | attribute is not present. */ | |
21765 | ||
21766 | static struct type * | |
21767 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
21768 | { | |
b4ba55a1 | 21769 | struct attribute *type_attr; |
b4ba55a1 JB |
21770 | |
21771 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
21772 | if (!type_attr) | |
21773 | return NULL; | |
21774 | ||
673bfd45 | 21775 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
21776 | } |
21777 | ||
21778 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
21779 | descriptive type accordingly. */ | |
21780 | ||
21781 | static void | |
21782 | set_descriptive_type (struct type *type, struct die_info *die, | |
21783 | struct dwarf2_cu *cu) | |
21784 | { | |
21785 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
21786 | ||
21787 | if (descriptive_type) | |
21788 | { | |
21789 | ALLOCATE_GNAT_AUX_TYPE (type); | |
21790 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
21791 | } | |
21792 | } | |
21793 | ||
c906108c SS |
21794 | /* Return the containing type of the die in question using its |
21795 | DW_AT_containing_type attribute. */ | |
21796 | ||
21797 | static struct type * | |
e7c27a73 | 21798 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21799 | { |
c906108c | 21800 | struct attribute *type_attr; |
c906108c | 21801 | |
e142c38c | 21802 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
21803 | if (!type_attr) |
21804 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 21805 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 21806 | |
673bfd45 | 21807 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21808 | } |
21809 | ||
ac9ec31b DE |
21810 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
21811 | ||
21812 | static struct type * | |
21813 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
21814 | { | |
21815 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
21816 | char *message, *saved; | |
21817 | ||
21818 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 21819 | objfile_name (objfile), |
9c541725 PA |
21820 | to_underlying (cu->header.sect_off), |
21821 | to_underlying (die->sect_off)); | |
224c3ddb SM |
21822 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
21823 | message, strlen (message)); | |
ac9ec31b DE |
21824 | xfree (message); |
21825 | ||
19f392bc | 21826 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
21827 | } |
21828 | ||
673bfd45 | 21829 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
21830 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
21831 | DW_AT_containing_type. | |
673bfd45 DE |
21832 | If there is no type substitute an error marker. */ |
21833 | ||
c906108c | 21834 | static struct type * |
ff39bb5e | 21835 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 21836 | struct dwarf2_cu *cu) |
c906108c | 21837 | { |
bb5ed363 | 21838 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
21839 | struct type *this_type; |
21840 | ||
ac9ec31b DE |
21841 | gdb_assert (attr->name == DW_AT_type |
21842 | || attr->name == DW_AT_GNAT_descriptive_type | |
21843 | || attr->name == DW_AT_containing_type); | |
21844 | ||
673bfd45 DE |
21845 | /* First see if we have it cached. */ |
21846 | ||
36586728 TT |
21847 | if (attr->form == DW_FORM_GNU_ref_alt) |
21848 | { | |
21849 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 21850 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 21851 | |
9c541725 PA |
21852 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
21853 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 21854 | } |
7771576e | 21855 | else if (attr_form_is_ref (attr)) |
673bfd45 | 21856 | { |
9c541725 | 21857 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 21858 | |
9c541725 | 21859 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 21860 | } |
55f1336d | 21861 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 21862 | { |
ac9ec31b | 21863 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 21864 | |
ac9ec31b | 21865 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
21866 | } |
21867 | else | |
21868 | { | |
ac9ec31b DE |
21869 | complaint (&symfile_complaints, |
21870 | _("Dwarf Error: Bad type attribute %s in DIE" | |
21871 | " at 0x%x [in module %s]"), | |
9c541725 | 21872 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 21873 | objfile_name (objfile)); |
ac9ec31b | 21874 | return build_error_marker_type (cu, die); |
673bfd45 DE |
21875 | } |
21876 | ||
21877 | /* If not cached we need to read it in. */ | |
21878 | ||
21879 | if (this_type == NULL) | |
21880 | { | |
ac9ec31b | 21881 | struct die_info *type_die = NULL; |
673bfd45 DE |
21882 | struct dwarf2_cu *type_cu = cu; |
21883 | ||
7771576e | 21884 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
21885 | type_die = follow_die_ref (die, attr, &type_cu); |
21886 | if (type_die == NULL) | |
21887 | return build_error_marker_type (cu, die); | |
21888 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
21889 | from an inter-CU reference and the type's CU got expanded before |
21890 | ours. */ | |
ac9ec31b | 21891 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
21892 | } |
21893 | ||
21894 | /* If we still don't have a type use an error marker. */ | |
21895 | ||
21896 | if (this_type == NULL) | |
ac9ec31b | 21897 | return build_error_marker_type (cu, die); |
673bfd45 | 21898 | |
f792889a | 21899 | return this_type; |
c906108c SS |
21900 | } |
21901 | ||
673bfd45 DE |
21902 | /* Return the type in DIE, CU. |
21903 | Returns NULL for invalid types. | |
21904 | ||
02142a6c | 21905 | This first does a lookup in die_type_hash, |
673bfd45 DE |
21906 | and only reads the die in if necessary. |
21907 | ||
21908 | NOTE: This can be called when reading in partial or full symbols. */ | |
21909 | ||
f792889a | 21910 | static struct type * |
e7c27a73 | 21911 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21912 | { |
f792889a DJ |
21913 | struct type *this_type; |
21914 | ||
21915 | this_type = get_die_type (die, cu); | |
21916 | if (this_type) | |
21917 | return this_type; | |
21918 | ||
673bfd45 DE |
21919 | return read_type_die_1 (die, cu); |
21920 | } | |
21921 | ||
21922 | /* Read the type in DIE, CU. | |
21923 | Returns NULL for invalid types. */ | |
21924 | ||
21925 | static struct type * | |
21926 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
21927 | { | |
21928 | struct type *this_type = NULL; | |
21929 | ||
c906108c SS |
21930 | switch (die->tag) |
21931 | { | |
21932 | case DW_TAG_class_type: | |
680b30c7 | 21933 | case DW_TAG_interface_type: |
c906108c SS |
21934 | case DW_TAG_structure_type: |
21935 | case DW_TAG_union_type: | |
f792889a | 21936 | this_type = read_structure_type (die, cu); |
c906108c SS |
21937 | break; |
21938 | case DW_TAG_enumeration_type: | |
f792889a | 21939 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
21940 | break; |
21941 | case DW_TAG_subprogram: | |
21942 | case DW_TAG_subroutine_type: | |
edb3359d | 21943 | case DW_TAG_inlined_subroutine: |
f792889a | 21944 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
21945 | break; |
21946 | case DW_TAG_array_type: | |
f792889a | 21947 | this_type = read_array_type (die, cu); |
c906108c | 21948 | break; |
72019c9c | 21949 | case DW_TAG_set_type: |
f792889a | 21950 | this_type = read_set_type (die, cu); |
72019c9c | 21951 | break; |
c906108c | 21952 | case DW_TAG_pointer_type: |
f792889a | 21953 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
21954 | break; |
21955 | case DW_TAG_ptr_to_member_type: | |
f792889a | 21956 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
21957 | break; |
21958 | case DW_TAG_reference_type: | |
4297a3f0 AV |
21959 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
21960 | break; | |
21961 | case DW_TAG_rvalue_reference_type: | |
21962 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
21963 | break; |
21964 | case DW_TAG_const_type: | |
f792889a | 21965 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
21966 | break; |
21967 | case DW_TAG_volatile_type: | |
f792889a | 21968 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 21969 | break; |
06d66ee9 TT |
21970 | case DW_TAG_restrict_type: |
21971 | this_type = read_tag_restrict_type (die, cu); | |
21972 | break; | |
c906108c | 21973 | case DW_TAG_string_type: |
f792889a | 21974 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
21975 | break; |
21976 | case DW_TAG_typedef: | |
f792889a | 21977 | this_type = read_typedef (die, cu); |
c906108c | 21978 | break; |
a02abb62 | 21979 | case DW_TAG_subrange_type: |
f792889a | 21980 | this_type = read_subrange_type (die, cu); |
a02abb62 | 21981 | break; |
c906108c | 21982 | case DW_TAG_base_type: |
f792889a | 21983 | this_type = read_base_type (die, cu); |
c906108c | 21984 | break; |
81a17f79 | 21985 | case DW_TAG_unspecified_type: |
f792889a | 21986 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 21987 | break; |
0114d602 DJ |
21988 | case DW_TAG_namespace: |
21989 | this_type = read_namespace_type (die, cu); | |
21990 | break; | |
f55ee35c JK |
21991 | case DW_TAG_module: |
21992 | this_type = read_module_type (die, cu); | |
21993 | break; | |
a2c2acaf MW |
21994 | case DW_TAG_atomic_type: |
21995 | this_type = read_tag_atomic_type (die, cu); | |
21996 | break; | |
c906108c | 21997 | default: |
3e43a32a MS |
21998 | complaint (&symfile_complaints, |
21999 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 22000 | dwarf_tag_name (die->tag)); |
c906108c SS |
22001 | break; |
22002 | } | |
63d06c5c | 22003 | |
f792889a | 22004 | return this_type; |
63d06c5c DC |
22005 | } |
22006 | ||
abc72ce4 DE |
22007 | /* See if we can figure out if the class lives in a namespace. We do |
22008 | this by looking for a member function; its demangled name will | |
22009 | contain namespace info, if there is any. | |
22010 | Return the computed name or NULL. | |
22011 | Space for the result is allocated on the objfile's obstack. | |
22012 | This is the full-die version of guess_partial_die_structure_name. | |
22013 | In this case we know DIE has no useful parent. */ | |
22014 | ||
22015 | static char * | |
22016 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
22017 | { | |
22018 | struct die_info *spec_die; | |
22019 | struct dwarf2_cu *spec_cu; | |
22020 | struct die_info *child; | |
22021 | ||
22022 | spec_cu = cu; | |
22023 | spec_die = die_specification (die, &spec_cu); | |
22024 | if (spec_die != NULL) | |
22025 | { | |
22026 | die = spec_die; | |
22027 | cu = spec_cu; | |
22028 | } | |
22029 | ||
22030 | for (child = die->child; | |
22031 | child != NULL; | |
22032 | child = child->sibling) | |
22033 | { | |
22034 | if (child->tag == DW_TAG_subprogram) | |
22035 | { | |
73b9be8b | 22036 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 22037 | |
7d45c7c3 | 22038 | if (linkage_name != NULL) |
abc72ce4 DE |
22039 | { |
22040 | char *actual_name | |
22041 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 22042 | linkage_name); |
abc72ce4 DE |
22043 | char *name = NULL; |
22044 | ||
22045 | if (actual_name != NULL) | |
22046 | { | |
15d034d0 | 22047 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
22048 | |
22049 | if (die_name != NULL | |
22050 | && strcmp (die_name, actual_name) != 0) | |
22051 | { | |
22052 | /* Strip off the class name from the full name. | |
22053 | We want the prefix. */ | |
22054 | int die_name_len = strlen (die_name); | |
22055 | int actual_name_len = strlen (actual_name); | |
22056 | ||
22057 | /* Test for '::' as a sanity check. */ | |
22058 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
22059 | && actual_name[actual_name_len |
22060 | - die_name_len - 1] == ':') | |
224c3ddb SM |
22061 | name = (char *) obstack_copy0 ( |
22062 | &cu->objfile->per_bfd->storage_obstack, | |
22063 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
22064 | } |
22065 | } | |
22066 | xfree (actual_name); | |
22067 | return name; | |
22068 | } | |
22069 | } | |
22070 | } | |
22071 | ||
22072 | return NULL; | |
22073 | } | |
22074 | ||
96408a79 SA |
22075 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
22076 | prefix part in such case. See | |
22077 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22078 | ||
a121b7c1 | 22079 | static const char * |
96408a79 SA |
22080 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
22081 | { | |
22082 | struct attribute *attr; | |
e6a959d6 | 22083 | const char *base; |
96408a79 SA |
22084 | |
22085 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
22086 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
22087 | return NULL; | |
22088 | ||
7d45c7c3 | 22089 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
22090 | return NULL; |
22091 | ||
73b9be8b | 22092 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
22093 | if (attr == NULL || DW_STRING (attr) == NULL) |
22094 | return NULL; | |
22095 | ||
22096 | /* dwarf2_name had to be already called. */ | |
22097 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
22098 | ||
22099 | /* Strip the base name, keep any leading namespaces/classes. */ | |
22100 | base = strrchr (DW_STRING (attr), ':'); | |
22101 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
22102 | return ""; | |
22103 | ||
224c3ddb SM |
22104 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
22105 | DW_STRING (attr), | |
22106 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
22107 | } |
22108 | ||
fdde2d81 | 22109 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 22110 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 22111 | |
0114d602 DJ |
22112 | For example, if we're within the method foo() in the following |
22113 | code: | |
22114 | ||
22115 | namespace N { | |
22116 | class C { | |
22117 | void foo () { | |
22118 | } | |
22119 | }; | |
22120 | } | |
22121 | ||
22122 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 22123 | |
0d5cff50 | 22124 | static const char * |
e142c38c | 22125 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 22126 | { |
0114d602 DJ |
22127 | struct die_info *parent, *spec_die; |
22128 | struct dwarf2_cu *spec_cu; | |
22129 | struct type *parent_type; | |
a121b7c1 | 22130 | const char *retval; |
63d06c5c | 22131 | |
9c37b5ae | 22132 | if (cu->language != language_cplus |
c44af4eb TT |
22133 | && cu->language != language_fortran && cu->language != language_d |
22134 | && cu->language != language_rust) | |
0114d602 DJ |
22135 | return ""; |
22136 | ||
96408a79 SA |
22137 | retval = anonymous_struct_prefix (die, cu); |
22138 | if (retval) | |
22139 | return retval; | |
22140 | ||
0114d602 DJ |
22141 | /* We have to be careful in the presence of DW_AT_specification. |
22142 | For example, with GCC 3.4, given the code | |
22143 | ||
22144 | namespace N { | |
22145 | void foo() { | |
22146 | // Definition of N::foo. | |
22147 | } | |
22148 | } | |
22149 | ||
22150 | then we'll have a tree of DIEs like this: | |
22151 | ||
22152 | 1: DW_TAG_compile_unit | |
22153 | 2: DW_TAG_namespace // N | |
22154 | 3: DW_TAG_subprogram // declaration of N::foo | |
22155 | 4: DW_TAG_subprogram // definition of N::foo | |
22156 | DW_AT_specification // refers to die #3 | |
22157 | ||
22158 | Thus, when processing die #4, we have to pretend that we're in | |
22159 | the context of its DW_AT_specification, namely the contex of die | |
22160 | #3. */ | |
22161 | spec_cu = cu; | |
22162 | spec_die = die_specification (die, &spec_cu); | |
22163 | if (spec_die == NULL) | |
22164 | parent = die->parent; | |
22165 | else | |
63d06c5c | 22166 | { |
0114d602 DJ |
22167 | parent = spec_die->parent; |
22168 | cu = spec_cu; | |
63d06c5c | 22169 | } |
0114d602 DJ |
22170 | |
22171 | if (parent == NULL) | |
22172 | return ""; | |
98bfdba5 PA |
22173 | else if (parent->building_fullname) |
22174 | { | |
22175 | const char *name; | |
22176 | const char *parent_name; | |
22177 | ||
22178 | /* It has been seen on RealView 2.2 built binaries, | |
22179 | DW_TAG_template_type_param types actually _defined_ as | |
22180 | children of the parent class: | |
22181 | ||
22182 | enum E {}; | |
22183 | template class <class Enum> Class{}; | |
22184 | Class<enum E> class_e; | |
22185 | ||
22186 | 1: DW_TAG_class_type (Class) | |
22187 | 2: DW_TAG_enumeration_type (E) | |
22188 | 3: DW_TAG_enumerator (enum1:0) | |
22189 | 3: DW_TAG_enumerator (enum2:1) | |
22190 | ... | |
22191 | 2: DW_TAG_template_type_param | |
22192 | DW_AT_type DW_FORM_ref_udata (E) | |
22193 | ||
22194 | Besides being broken debug info, it can put GDB into an | |
22195 | infinite loop. Consider: | |
22196 | ||
22197 | When we're building the full name for Class<E>, we'll start | |
22198 | at Class, and go look over its template type parameters, | |
22199 | finding E. We'll then try to build the full name of E, and | |
22200 | reach here. We're now trying to build the full name of E, | |
22201 | and look over the parent DIE for containing scope. In the | |
22202 | broken case, if we followed the parent DIE of E, we'd again | |
22203 | find Class, and once again go look at its template type | |
22204 | arguments, etc., etc. Simply don't consider such parent die | |
22205 | as source-level parent of this die (it can't be, the language | |
22206 | doesn't allow it), and break the loop here. */ | |
22207 | name = dwarf2_name (die, cu); | |
22208 | parent_name = dwarf2_name (parent, cu); | |
22209 | complaint (&symfile_complaints, | |
22210 | _("template param type '%s' defined within parent '%s'"), | |
22211 | name ? name : "<unknown>", | |
22212 | parent_name ? parent_name : "<unknown>"); | |
22213 | return ""; | |
22214 | } | |
63d06c5c | 22215 | else |
0114d602 DJ |
22216 | switch (parent->tag) |
22217 | { | |
63d06c5c | 22218 | case DW_TAG_namespace: |
0114d602 | 22219 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
22220 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
22221 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
22222 | Work around this problem here. */ | |
22223 | if (cu->language == language_cplus | |
22224 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
22225 | return ""; | |
0114d602 DJ |
22226 | /* We give a name to even anonymous namespaces. */ |
22227 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 22228 | case DW_TAG_class_type: |
680b30c7 | 22229 | case DW_TAG_interface_type: |
63d06c5c | 22230 | case DW_TAG_structure_type: |
0114d602 | 22231 | case DW_TAG_union_type: |
f55ee35c | 22232 | case DW_TAG_module: |
0114d602 DJ |
22233 | parent_type = read_type_die (parent, cu); |
22234 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
22235 | return TYPE_TAG_NAME (parent_type); | |
22236 | else | |
22237 | /* An anonymous structure is only allowed non-static data | |
22238 | members; no typedefs, no member functions, et cetera. | |
22239 | So it does not need a prefix. */ | |
22240 | return ""; | |
abc72ce4 | 22241 | case DW_TAG_compile_unit: |
95554aad | 22242 | case DW_TAG_partial_unit: |
abc72ce4 DE |
22243 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
22244 | if (cu->language == language_cplus | |
8b70b953 | 22245 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
22246 | && die->child != NULL |
22247 | && (die->tag == DW_TAG_class_type | |
22248 | || die->tag == DW_TAG_structure_type | |
22249 | || die->tag == DW_TAG_union_type)) | |
22250 | { | |
22251 | char *name = guess_full_die_structure_name (die, cu); | |
22252 | if (name != NULL) | |
22253 | return name; | |
22254 | } | |
22255 | return ""; | |
3d567982 TT |
22256 | case DW_TAG_enumeration_type: |
22257 | parent_type = read_type_die (parent, cu); | |
22258 | if (TYPE_DECLARED_CLASS (parent_type)) | |
22259 | { | |
22260 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
22261 | return TYPE_TAG_NAME (parent_type); | |
22262 | return ""; | |
22263 | } | |
22264 | /* Fall through. */ | |
63d06c5c | 22265 | default: |
8176b9b8 | 22266 | return determine_prefix (parent, cu); |
63d06c5c | 22267 | } |
63d06c5c DC |
22268 | } |
22269 | ||
3e43a32a MS |
22270 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
22271 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
22272 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
22273 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
22274 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 22275 | |
f55ee35c | 22276 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
22277 | |
22278 | static char * | |
f55ee35c JK |
22279 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
22280 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 22281 | { |
f55ee35c | 22282 | const char *lead = ""; |
5c315b68 | 22283 | const char *sep; |
63d06c5c | 22284 | |
3e43a32a MS |
22285 | if (suffix == NULL || suffix[0] == '\0' |
22286 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 22287 | sep = ""; |
45280282 IB |
22288 | else if (cu->language == language_d) |
22289 | { | |
22290 | /* For D, the 'main' function could be defined in any module, but it | |
22291 | should never be prefixed. */ | |
22292 | if (strcmp (suffix, "D main") == 0) | |
22293 | { | |
22294 | prefix = ""; | |
22295 | sep = ""; | |
22296 | } | |
22297 | else | |
22298 | sep = "."; | |
22299 | } | |
f55ee35c JK |
22300 | else if (cu->language == language_fortran && physname) |
22301 | { | |
22302 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
22303 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
22304 | ||
22305 | lead = "__"; | |
22306 | sep = "_MOD_"; | |
22307 | } | |
987504bb JJ |
22308 | else |
22309 | sep = "::"; | |
63d06c5c | 22310 | |
6dd47d34 DE |
22311 | if (prefix == NULL) |
22312 | prefix = ""; | |
22313 | if (suffix == NULL) | |
22314 | suffix = ""; | |
22315 | ||
987504bb JJ |
22316 | if (obs == NULL) |
22317 | { | |
3e43a32a | 22318 | char *retval |
224c3ddb SM |
22319 | = ((char *) |
22320 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 22321 | |
f55ee35c JK |
22322 | strcpy (retval, lead); |
22323 | strcat (retval, prefix); | |
6dd47d34 DE |
22324 | strcat (retval, sep); |
22325 | strcat (retval, suffix); | |
63d06c5c DC |
22326 | return retval; |
22327 | } | |
987504bb JJ |
22328 | else |
22329 | { | |
22330 | /* We have an obstack. */ | |
f55ee35c | 22331 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 22332 | } |
63d06c5c DC |
22333 | } |
22334 | ||
c906108c SS |
22335 | /* Return sibling of die, NULL if no sibling. */ |
22336 | ||
f9aca02d | 22337 | static struct die_info * |
fba45db2 | 22338 | sibling_die (struct die_info *die) |
c906108c | 22339 | { |
639d11d3 | 22340 | return die->sibling; |
c906108c SS |
22341 | } |
22342 | ||
71c25dea TT |
22343 | /* Get name of a die, return NULL if not found. */ |
22344 | ||
15d034d0 TT |
22345 | static const char * |
22346 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
22347 | struct obstack *obstack) |
22348 | { | |
22349 | if (name && cu->language == language_cplus) | |
22350 | { | |
2f408ecb | 22351 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 22352 | |
2f408ecb | 22353 | if (!canon_name.empty ()) |
71c25dea | 22354 | { |
2f408ecb PA |
22355 | if (canon_name != name) |
22356 | name = (const char *) obstack_copy0 (obstack, | |
22357 | canon_name.c_str (), | |
22358 | canon_name.length ()); | |
71c25dea TT |
22359 | } |
22360 | } | |
22361 | ||
22362 | return name; | |
c906108c SS |
22363 | } |
22364 | ||
96553a0c DE |
22365 | /* Get name of a die, return NULL if not found. |
22366 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 22367 | |
15d034d0 | 22368 | static const char * |
e142c38c | 22369 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
22370 | { |
22371 | struct attribute *attr; | |
22372 | ||
e142c38c | 22373 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 22374 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 22375 | && die->tag != DW_TAG_namespace |
53832f31 TT |
22376 | && die->tag != DW_TAG_class_type |
22377 | && die->tag != DW_TAG_interface_type | |
22378 | && die->tag != DW_TAG_structure_type | |
22379 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
22380 | return NULL; |
22381 | ||
22382 | switch (die->tag) | |
22383 | { | |
22384 | case DW_TAG_compile_unit: | |
95554aad | 22385 | case DW_TAG_partial_unit: |
71c25dea TT |
22386 | /* Compilation units have a DW_AT_name that is a filename, not |
22387 | a source language identifier. */ | |
22388 | case DW_TAG_enumeration_type: | |
22389 | case DW_TAG_enumerator: | |
22390 | /* These tags always have simple identifiers already; no need | |
22391 | to canonicalize them. */ | |
22392 | return DW_STRING (attr); | |
907af001 | 22393 | |
96553a0c DE |
22394 | case DW_TAG_namespace: |
22395 | if (attr != NULL && DW_STRING (attr) != NULL) | |
22396 | return DW_STRING (attr); | |
22397 | return CP_ANONYMOUS_NAMESPACE_STR; | |
22398 | ||
907af001 UW |
22399 | case DW_TAG_class_type: |
22400 | case DW_TAG_interface_type: | |
22401 | case DW_TAG_structure_type: | |
22402 | case DW_TAG_union_type: | |
22403 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
22404 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
22405 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
22406 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 22407 | if (attr && DW_STRING (attr) |
61012eef GB |
22408 | && (startswith (DW_STRING (attr), "._") |
22409 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 22410 | return NULL; |
53832f31 TT |
22411 | |
22412 | /* GCC might emit a nameless typedef that has a linkage name. See | |
22413 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22414 | if (!attr || DW_STRING (attr) == NULL) | |
22415 | { | |
df5c6c50 | 22416 | char *demangled = NULL; |
53832f31 | 22417 | |
73b9be8b | 22418 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
22419 | if (attr == NULL || DW_STRING (attr) == NULL) |
22420 | return NULL; | |
22421 | ||
df5c6c50 JK |
22422 | /* Avoid demangling DW_STRING (attr) the second time on a second |
22423 | call for the same DIE. */ | |
22424 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 22425 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
22426 | |
22427 | if (demangled) | |
22428 | { | |
e6a959d6 | 22429 | const char *base; |
96408a79 | 22430 | |
53832f31 | 22431 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 22432 | DW_STRING (attr) |
224c3ddb SM |
22433 | = ((const char *) |
22434 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
22435 | demangled, strlen (demangled))); | |
53832f31 TT |
22436 | DW_STRING_IS_CANONICAL (attr) = 1; |
22437 | xfree (demangled); | |
96408a79 SA |
22438 | |
22439 | /* Strip any leading namespaces/classes, keep only the base name. | |
22440 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
22441 | base = strrchr (DW_STRING (attr), ':'); | |
22442 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
22443 | return &base[1]; | |
22444 | else | |
22445 | return DW_STRING (attr); | |
53832f31 TT |
22446 | } |
22447 | } | |
907af001 UW |
22448 | break; |
22449 | ||
71c25dea | 22450 | default: |
907af001 UW |
22451 | break; |
22452 | } | |
22453 | ||
22454 | if (!DW_STRING_IS_CANONICAL (attr)) | |
22455 | { | |
22456 | DW_STRING (attr) | |
22457 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 22458 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 22459 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 22460 | } |
907af001 | 22461 | return DW_STRING (attr); |
9219021c DC |
22462 | } |
22463 | ||
22464 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
22465 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
22466 | containing the return value on output. */ | |
9219021c DC |
22467 | |
22468 | static struct die_info * | |
f2f0e013 | 22469 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
22470 | { |
22471 | struct attribute *attr; | |
9219021c | 22472 | |
f2f0e013 | 22473 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
22474 | if (attr == NULL) |
22475 | return NULL; | |
22476 | ||
f2f0e013 | 22477 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
22478 | } |
22479 | ||
c906108c SS |
22480 | /* Convert a DIE tag into its string name. */ |
22481 | ||
f39c6ffd | 22482 | static const char * |
aa1ee363 | 22483 | dwarf_tag_name (unsigned tag) |
c906108c | 22484 | { |
f39c6ffd TT |
22485 | const char *name = get_DW_TAG_name (tag); |
22486 | ||
22487 | if (name == NULL) | |
22488 | return "DW_TAG_<unknown>"; | |
22489 | ||
22490 | return name; | |
c906108c SS |
22491 | } |
22492 | ||
22493 | /* Convert a DWARF attribute code into its string name. */ | |
22494 | ||
f39c6ffd | 22495 | static const char * |
aa1ee363 | 22496 | dwarf_attr_name (unsigned attr) |
c906108c | 22497 | { |
f39c6ffd TT |
22498 | const char *name; |
22499 | ||
c764a876 | 22500 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
22501 | if (attr == DW_AT_MIPS_fde) |
22502 | return "DW_AT_MIPS_fde"; | |
22503 | #else | |
22504 | if (attr == DW_AT_HP_block_index) | |
22505 | return "DW_AT_HP_block_index"; | |
c764a876 | 22506 | #endif |
f39c6ffd TT |
22507 | |
22508 | name = get_DW_AT_name (attr); | |
22509 | ||
22510 | if (name == NULL) | |
22511 | return "DW_AT_<unknown>"; | |
22512 | ||
22513 | return name; | |
c906108c SS |
22514 | } |
22515 | ||
22516 | /* Convert a DWARF value form code into its string name. */ | |
22517 | ||
f39c6ffd | 22518 | static const char * |
aa1ee363 | 22519 | dwarf_form_name (unsigned form) |
c906108c | 22520 | { |
f39c6ffd TT |
22521 | const char *name = get_DW_FORM_name (form); |
22522 | ||
22523 | if (name == NULL) | |
22524 | return "DW_FORM_<unknown>"; | |
22525 | ||
22526 | return name; | |
c906108c SS |
22527 | } |
22528 | ||
a121b7c1 | 22529 | static const char * |
fba45db2 | 22530 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
22531 | { |
22532 | if (mybool) | |
22533 | return "TRUE"; | |
22534 | else | |
22535 | return "FALSE"; | |
22536 | } | |
22537 | ||
22538 | /* Convert a DWARF type code into its string name. */ | |
22539 | ||
f39c6ffd | 22540 | static const char * |
aa1ee363 | 22541 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 22542 | { |
f39c6ffd | 22543 | const char *name = get_DW_ATE_name (enc); |
c906108c | 22544 | |
f39c6ffd TT |
22545 | if (name == NULL) |
22546 | return "DW_ATE_<unknown>"; | |
c906108c | 22547 | |
f39c6ffd | 22548 | return name; |
c906108c | 22549 | } |
c906108c | 22550 | |
f9aca02d | 22551 | static void |
d97bc12b | 22552 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
22553 | { |
22554 | unsigned int i; | |
22555 | ||
d97bc12b DE |
22556 | print_spaces (indent, f); |
22557 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
22558 | dwarf_tag_name (die->tag), die->abbrev, |
22559 | to_underlying (die->sect_off)); | |
d97bc12b DE |
22560 | |
22561 | if (die->parent != NULL) | |
22562 | { | |
22563 | print_spaces (indent, f); | |
22564 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 22565 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
22566 | } |
22567 | ||
22568 | print_spaces (indent, f); | |
22569 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 22570 | dwarf_bool_name (die->child != NULL)); |
c906108c | 22571 | |
d97bc12b DE |
22572 | print_spaces (indent, f); |
22573 | fprintf_unfiltered (f, " attributes:\n"); | |
22574 | ||
c906108c SS |
22575 | for (i = 0; i < die->num_attrs; ++i) |
22576 | { | |
d97bc12b DE |
22577 | print_spaces (indent, f); |
22578 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
22579 | dwarf_attr_name (die->attrs[i].name), |
22580 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 22581 | |
c906108c SS |
22582 | switch (die->attrs[i].form) |
22583 | { | |
c906108c | 22584 | case DW_FORM_addr: |
3019eac3 | 22585 | case DW_FORM_GNU_addr_index: |
d97bc12b | 22586 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 22587 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
22588 | break; |
22589 | case DW_FORM_block2: | |
22590 | case DW_FORM_block4: | |
22591 | case DW_FORM_block: | |
22592 | case DW_FORM_block1: | |
56eb65bd SP |
22593 | fprintf_unfiltered (f, "block: size %s", |
22594 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 22595 | break; |
2dc7f7b3 | 22596 | case DW_FORM_exprloc: |
56eb65bd SP |
22597 | fprintf_unfiltered (f, "expression: size %s", |
22598 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 22599 | break; |
0224619f JK |
22600 | case DW_FORM_data16: |
22601 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
22602 | break; | |
4568ecf9 DE |
22603 | case DW_FORM_ref_addr: |
22604 | fprintf_unfiltered (f, "ref address: "); | |
22605 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
22606 | break; | |
36586728 TT |
22607 | case DW_FORM_GNU_ref_alt: |
22608 | fprintf_unfiltered (f, "alt ref address: "); | |
22609 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
22610 | break; | |
10b3939b DJ |
22611 | case DW_FORM_ref1: |
22612 | case DW_FORM_ref2: | |
22613 | case DW_FORM_ref4: | |
4568ecf9 DE |
22614 | case DW_FORM_ref8: |
22615 | case DW_FORM_ref_udata: | |
d97bc12b | 22616 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 22617 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 22618 | break; |
c906108c SS |
22619 | case DW_FORM_data1: |
22620 | case DW_FORM_data2: | |
22621 | case DW_FORM_data4: | |
ce5d95e1 | 22622 | case DW_FORM_data8: |
c906108c SS |
22623 | case DW_FORM_udata: |
22624 | case DW_FORM_sdata: | |
43bbcdc2 PH |
22625 | fprintf_unfiltered (f, "constant: %s", |
22626 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 22627 | break; |
2dc7f7b3 TT |
22628 | case DW_FORM_sec_offset: |
22629 | fprintf_unfiltered (f, "section offset: %s", | |
22630 | pulongest (DW_UNSND (&die->attrs[i]))); | |
22631 | break; | |
55f1336d | 22632 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
22633 | fprintf_unfiltered (f, "signature: %s", |
22634 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 22635 | break; |
c906108c | 22636 | case DW_FORM_string: |
4bdf3d34 | 22637 | case DW_FORM_strp: |
43988095 | 22638 | case DW_FORM_line_strp: |
3019eac3 | 22639 | case DW_FORM_GNU_str_index: |
36586728 | 22640 | case DW_FORM_GNU_strp_alt: |
8285870a | 22641 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 22642 | DW_STRING (&die->attrs[i]) |
8285870a JK |
22643 | ? DW_STRING (&die->attrs[i]) : "", |
22644 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
22645 | break; |
22646 | case DW_FORM_flag: | |
22647 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 22648 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 22649 | else |
d97bc12b | 22650 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 22651 | break; |
2dc7f7b3 TT |
22652 | case DW_FORM_flag_present: |
22653 | fprintf_unfiltered (f, "flag: TRUE"); | |
22654 | break; | |
a8329558 | 22655 | case DW_FORM_indirect: |
0963b4bd MS |
22656 | /* The reader will have reduced the indirect form to |
22657 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
22658 | fprintf_unfiltered (f, |
22659 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 22660 | break; |
663c44ac JK |
22661 | case DW_FORM_implicit_const: |
22662 | fprintf_unfiltered (f, "constant: %s", | |
22663 | plongest (DW_SND (&die->attrs[i]))); | |
22664 | break; | |
c906108c | 22665 | default: |
d97bc12b | 22666 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 22667 | die->attrs[i].form); |
d97bc12b | 22668 | break; |
c906108c | 22669 | } |
d97bc12b | 22670 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
22671 | } |
22672 | } | |
22673 | ||
f9aca02d | 22674 | static void |
d97bc12b | 22675 | dump_die_for_error (struct die_info *die) |
c906108c | 22676 | { |
d97bc12b DE |
22677 | dump_die_shallow (gdb_stderr, 0, die); |
22678 | } | |
22679 | ||
22680 | static void | |
22681 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
22682 | { | |
22683 | int indent = level * 4; | |
22684 | ||
22685 | gdb_assert (die != NULL); | |
22686 | ||
22687 | if (level >= max_level) | |
22688 | return; | |
22689 | ||
22690 | dump_die_shallow (f, indent, die); | |
22691 | ||
22692 | if (die->child != NULL) | |
c906108c | 22693 | { |
d97bc12b DE |
22694 | print_spaces (indent, f); |
22695 | fprintf_unfiltered (f, " Children:"); | |
22696 | if (level + 1 < max_level) | |
22697 | { | |
22698 | fprintf_unfiltered (f, "\n"); | |
22699 | dump_die_1 (f, level + 1, max_level, die->child); | |
22700 | } | |
22701 | else | |
22702 | { | |
3e43a32a MS |
22703 | fprintf_unfiltered (f, |
22704 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22705 | } |
22706 | } | |
22707 | ||
22708 | if (die->sibling != NULL && level > 0) | |
22709 | { | |
22710 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
22711 | } |
22712 | } | |
22713 | ||
d97bc12b DE |
22714 | /* This is called from the pdie macro in gdbinit.in. |
22715 | It's not static so gcc will keep a copy callable from gdb. */ | |
22716 | ||
22717 | void | |
22718 | dump_die (struct die_info *die, int max_level) | |
22719 | { | |
22720 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
22721 | } | |
22722 | ||
f9aca02d | 22723 | static void |
51545339 | 22724 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22725 | { |
51545339 | 22726 | void **slot; |
c906108c | 22727 | |
9c541725 PA |
22728 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
22729 | to_underlying (die->sect_off), | |
b64f50a1 | 22730 | INSERT); |
51545339 DJ |
22731 | |
22732 | *slot = die; | |
c906108c SS |
22733 | } |
22734 | ||
b64f50a1 JK |
22735 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
22736 | required kind. */ | |
22737 | ||
22738 | static sect_offset | |
ff39bb5e | 22739 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 22740 | { |
7771576e | 22741 | if (attr_form_is_ref (attr)) |
9c541725 | 22742 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
22743 | |
22744 | complaint (&symfile_complaints, | |
22745 | _("unsupported die ref attribute form: '%s'"), | |
22746 | dwarf_form_name (attr->form)); | |
9c541725 | 22747 | return {}; |
c906108c SS |
22748 | } |
22749 | ||
43bbcdc2 PH |
22750 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
22751 | * the value held by the attribute is not constant. */ | |
a02abb62 | 22752 | |
43bbcdc2 | 22753 | static LONGEST |
ff39bb5e | 22754 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 22755 | { |
663c44ac | 22756 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
22757 | return DW_SND (attr); |
22758 | else if (attr->form == DW_FORM_udata | |
22759 | || attr->form == DW_FORM_data1 | |
22760 | || attr->form == DW_FORM_data2 | |
22761 | || attr->form == DW_FORM_data4 | |
22762 | || attr->form == DW_FORM_data8) | |
22763 | return DW_UNSND (attr); | |
22764 | else | |
22765 | { | |
0224619f | 22766 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
22767 | complaint (&symfile_complaints, |
22768 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
22769 | dwarf_form_name (attr->form)); |
22770 | return default_value; | |
22771 | } | |
22772 | } | |
22773 | ||
348e048f DE |
22774 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
22775 | On entry *REF_CU is the CU of SRC_DIE. | |
22776 | On exit *REF_CU is the CU of the result. */ | |
22777 | ||
22778 | static struct die_info * | |
ff39bb5e | 22779 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
22780 | struct dwarf2_cu **ref_cu) |
22781 | { | |
22782 | struct die_info *die; | |
22783 | ||
7771576e | 22784 | if (attr_form_is_ref (attr)) |
348e048f | 22785 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 22786 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
22787 | die = follow_die_sig (src_die, attr, ref_cu); |
22788 | else | |
22789 | { | |
22790 | dump_die_for_error (src_die); | |
22791 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 22792 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
22793 | } |
22794 | ||
22795 | return die; | |
03dd20cc DJ |
22796 | } |
22797 | ||
5c631832 | 22798 | /* Follow reference OFFSET. |
673bfd45 DE |
22799 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
22800 | On exit *REF_CU is the CU of the result. | |
22801 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 22802 | |
f9aca02d | 22803 | static struct die_info * |
9c541725 | 22804 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 22805 | struct dwarf2_cu **ref_cu) |
c906108c | 22806 | { |
10b3939b | 22807 | struct die_info temp_die; |
f2f0e013 | 22808 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 22809 | |
348e048f DE |
22810 | gdb_assert (cu->per_cu != NULL); |
22811 | ||
98bfdba5 PA |
22812 | target_cu = cu; |
22813 | ||
3019eac3 | 22814 | if (cu->per_cu->is_debug_types) |
348e048f DE |
22815 | { |
22816 | /* .debug_types CUs cannot reference anything outside their CU. | |
22817 | If they need to, they have to reference a signatured type via | |
55f1336d | 22818 | DW_FORM_ref_sig8. */ |
9c541725 | 22819 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 22820 | return NULL; |
348e048f | 22821 | } |
36586728 | 22822 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 22823 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
22824 | { |
22825 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 22826 | |
9c541725 | 22827 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 22828 | cu->objfile); |
03dd20cc DJ |
22829 | |
22830 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
22831 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
22832 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 22833 | |
10b3939b DJ |
22834 | target_cu = per_cu->cu; |
22835 | } | |
98bfdba5 PA |
22836 | else if (cu->dies == NULL) |
22837 | { | |
22838 | /* We're loading full DIEs during partial symbol reading. */ | |
22839 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 22840 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 22841 | } |
c906108c | 22842 | |
f2f0e013 | 22843 | *ref_cu = target_cu; |
9c541725 | 22844 | temp_die.sect_off = sect_off; |
9a3c8263 | 22845 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
22846 | &temp_die, |
22847 | to_underlying (sect_off)); | |
5c631832 | 22848 | } |
10b3939b | 22849 | |
5c631832 JK |
22850 | /* Follow reference attribute ATTR of SRC_DIE. |
22851 | On entry *REF_CU is the CU of SRC_DIE. | |
22852 | On exit *REF_CU is the CU of the result. */ | |
22853 | ||
22854 | static struct die_info * | |
ff39bb5e | 22855 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
22856 | struct dwarf2_cu **ref_cu) |
22857 | { | |
9c541725 | 22858 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
22859 | struct dwarf2_cu *cu = *ref_cu; |
22860 | struct die_info *die; | |
22861 | ||
9c541725 | 22862 | die = follow_die_offset (sect_off, |
36586728 TT |
22863 | (attr->form == DW_FORM_GNU_ref_alt |
22864 | || cu->per_cu->is_dwz), | |
22865 | ref_cu); | |
5c631832 JK |
22866 | if (!die) |
22867 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
22868 | "at 0x%x [in module %s]"), | |
9c541725 | 22869 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 22870 | objfile_name (cu->objfile)); |
348e048f | 22871 | |
5c631832 JK |
22872 | return die; |
22873 | } | |
22874 | ||
9c541725 | 22875 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
22876 | Returned value is intended for DW_OP_call*. Returned |
22877 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
22878 | |
22879 | struct dwarf2_locexpr_baton | |
9c541725 | 22880 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
22881 | struct dwarf2_per_cu_data *per_cu, |
22882 | CORE_ADDR (*get_frame_pc) (void *baton), | |
22883 | void *baton) | |
5c631832 | 22884 | { |
918dd910 | 22885 | struct dwarf2_cu *cu; |
5c631832 JK |
22886 | struct die_info *die; |
22887 | struct attribute *attr; | |
22888 | struct dwarf2_locexpr_baton retval; | |
22889 | ||
8cf6f0b1 TT |
22890 | dw2_setup (per_cu->objfile); |
22891 | ||
918dd910 JK |
22892 | if (per_cu->cu == NULL) |
22893 | load_cu (per_cu); | |
22894 | cu = per_cu->cu; | |
cc12ce38 DE |
22895 | if (cu == NULL) |
22896 | { | |
22897 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22898 | Instead just throw an error, not much else we can do. */ | |
22899 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 22900 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 22901 | } |
918dd910 | 22902 | |
9c541725 | 22903 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
22904 | if (!die) |
22905 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 22906 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
22907 | |
22908 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
22909 | if (!attr) | |
22910 | { | |
e103e986 JK |
22911 | /* DWARF: "If there is no such attribute, then there is no effect.". |
22912 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 22913 | |
e103e986 | 22914 | retval.data = NULL; |
5c631832 JK |
22915 | retval.size = 0; |
22916 | } | |
8cf6f0b1 TT |
22917 | else if (attr_form_is_section_offset (attr)) |
22918 | { | |
22919 | struct dwarf2_loclist_baton loclist_baton; | |
22920 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
22921 | size_t size; | |
22922 | ||
22923 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
22924 | ||
22925 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
22926 | &size, pc); | |
22927 | retval.size = size; | |
22928 | } | |
5c631832 JK |
22929 | else |
22930 | { | |
22931 | if (!attr_form_is_block (attr)) | |
22932 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
22933 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 22934 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
22935 | |
22936 | retval.data = DW_BLOCK (attr)->data; | |
22937 | retval.size = DW_BLOCK (attr)->size; | |
22938 | } | |
22939 | retval.per_cu = cu->per_cu; | |
918dd910 | 22940 | |
918dd910 JK |
22941 | age_cached_comp_units (); |
22942 | ||
5c631832 | 22943 | return retval; |
348e048f DE |
22944 | } |
22945 | ||
8b9737bf TT |
22946 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
22947 | offset. */ | |
22948 | ||
22949 | struct dwarf2_locexpr_baton | |
22950 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
22951 | struct dwarf2_per_cu_data *per_cu, | |
22952 | CORE_ADDR (*get_frame_pc) (void *baton), | |
22953 | void *baton) | |
22954 | { | |
9c541725 | 22955 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 22956 | |
9c541725 | 22957 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
22958 | } |
22959 | ||
b6807d98 TT |
22960 | /* Write a constant of a given type as target-ordered bytes into |
22961 | OBSTACK. */ | |
22962 | ||
22963 | static const gdb_byte * | |
22964 | write_constant_as_bytes (struct obstack *obstack, | |
22965 | enum bfd_endian byte_order, | |
22966 | struct type *type, | |
22967 | ULONGEST value, | |
22968 | LONGEST *len) | |
22969 | { | |
22970 | gdb_byte *result; | |
22971 | ||
22972 | *len = TYPE_LENGTH (type); | |
224c3ddb | 22973 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22974 | store_unsigned_integer (result, *len, byte_order, value); |
22975 | ||
22976 | return result; | |
22977 | } | |
22978 | ||
22979 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
22980 | pointer to the constant bytes and set LEN to the length of the | |
22981 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
22982 | does not have a DW_AT_const_value, return NULL. */ | |
22983 | ||
22984 | const gdb_byte * | |
9c541725 | 22985 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
22986 | struct dwarf2_per_cu_data *per_cu, |
22987 | struct obstack *obstack, | |
22988 | LONGEST *len) | |
22989 | { | |
22990 | struct dwarf2_cu *cu; | |
22991 | struct die_info *die; | |
22992 | struct attribute *attr; | |
22993 | const gdb_byte *result = NULL; | |
22994 | struct type *type; | |
22995 | LONGEST value; | |
22996 | enum bfd_endian byte_order; | |
22997 | ||
22998 | dw2_setup (per_cu->objfile); | |
22999 | ||
23000 | if (per_cu->cu == NULL) | |
23001 | load_cu (per_cu); | |
23002 | cu = per_cu->cu; | |
cc12ce38 DE |
23003 | if (cu == NULL) |
23004 | { | |
23005 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23006 | Instead just throw an error, not much else we can do. */ | |
23007 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 23008 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 23009 | } |
b6807d98 | 23010 | |
9c541725 | 23011 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
23012 | if (!die) |
23013 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 23014 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
23015 | |
23016 | ||
23017 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
23018 | if (attr == NULL) | |
23019 | return NULL; | |
23020 | ||
23021 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
23022 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
23023 | ||
23024 | switch (attr->form) | |
23025 | { | |
23026 | case DW_FORM_addr: | |
23027 | case DW_FORM_GNU_addr_index: | |
23028 | { | |
23029 | gdb_byte *tem; | |
23030 | ||
23031 | *len = cu->header.addr_size; | |
224c3ddb | 23032 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23033 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
23034 | result = tem; | |
23035 | } | |
23036 | break; | |
23037 | case DW_FORM_string: | |
23038 | case DW_FORM_strp: | |
23039 | case DW_FORM_GNU_str_index: | |
23040 | case DW_FORM_GNU_strp_alt: | |
23041 | /* DW_STRING is already allocated on the objfile obstack, point | |
23042 | directly to it. */ | |
23043 | result = (const gdb_byte *) DW_STRING (attr); | |
23044 | *len = strlen (DW_STRING (attr)); | |
23045 | break; | |
23046 | case DW_FORM_block1: | |
23047 | case DW_FORM_block2: | |
23048 | case DW_FORM_block4: | |
23049 | case DW_FORM_block: | |
23050 | case DW_FORM_exprloc: | |
0224619f | 23051 | case DW_FORM_data16: |
b6807d98 TT |
23052 | result = DW_BLOCK (attr)->data; |
23053 | *len = DW_BLOCK (attr)->size; | |
23054 | break; | |
23055 | ||
23056 | /* The DW_AT_const_value attributes are supposed to carry the | |
23057 | symbol's value "represented as it would be on the target | |
23058 | architecture." By the time we get here, it's already been | |
23059 | converted to host endianness, so we just need to sign- or | |
23060 | zero-extend it as appropriate. */ | |
23061 | case DW_FORM_data1: | |
23062 | type = die_type (die, cu); | |
23063 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
23064 | if (result == NULL) | |
23065 | result = write_constant_as_bytes (obstack, byte_order, | |
23066 | type, value, len); | |
23067 | break; | |
23068 | case DW_FORM_data2: | |
23069 | type = die_type (die, cu); | |
23070 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
23071 | if (result == NULL) | |
23072 | result = write_constant_as_bytes (obstack, byte_order, | |
23073 | type, value, len); | |
23074 | break; | |
23075 | case DW_FORM_data4: | |
23076 | type = die_type (die, cu); | |
23077 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
23078 | if (result == NULL) | |
23079 | result = write_constant_as_bytes (obstack, byte_order, | |
23080 | type, value, len); | |
23081 | break; | |
23082 | case DW_FORM_data8: | |
23083 | type = die_type (die, cu); | |
23084 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
23085 | if (result == NULL) | |
23086 | result = write_constant_as_bytes (obstack, byte_order, | |
23087 | type, value, len); | |
23088 | break; | |
23089 | ||
23090 | case DW_FORM_sdata: | |
663c44ac | 23091 | case DW_FORM_implicit_const: |
b6807d98 TT |
23092 | type = die_type (die, cu); |
23093 | result = write_constant_as_bytes (obstack, byte_order, | |
23094 | type, DW_SND (attr), len); | |
23095 | break; | |
23096 | ||
23097 | case DW_FORM_udata: | |
23098 | type = die_type (die, cu); | |
23099 | result = write_constant_as_bytes (obstack, byte_order, | |
23100 | type, DW_UNSND (attr), len); | |
23101 | break; | |
23102 | ||
23103 | default: | |
23104 | complaint (&symfile_complaints, | |
23105 | _("unsupported const value attribute form: '%s'"), | |
23106 | dwarf_form_name (attr->form)); | |
23107 | break; | |
23108 | } | |
23109 | ||
23110 | return result; | |
23111 | } | |
23112 | ||
7942e96e AA |
23113 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
23114 | valid type for this die is found. */ | |
23115 | ||
23116 | struct type * | |
9c541725 | 23117 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
23118 | struct dwarf2_per_cu_data *per_cu) |
23119 | { | |
23120 | struct dwarf2_cu *cu; | |
23121 | struct die_info *die; | |
23122 | ||
23123 | dw2_setup (per_cu->objfile); | |
23124 | ||
23125 | if (per_cu->cu == NULL) | |
23126 | load_cu (per_cu); | |
23127 | cu = per_cu->cu; | |
23128 | if (!cu) | |
23129 | return NULL; | |
23130 | ||
9c541725 | 23131 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
23132 | if (!die) |
23133 | return NULL; | |
23134 | ||
23135 | return die_type (die, cu); | |
23136 | } | |
23137 | ||
8a9b8146 TT |
23138 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
23139 | PER_CU. */ | |
23140 | ||
23141 | struct type * | |
b64f50a1 | 23142 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
23143 | struct dwarf2_per_cu_data *per_cu) |
23144 | { | |
8a9b8146 | 23145 | dw2_setup (per_cu->objfile); |
b64f50a1 | 23146 | |
9c541725 | 23147 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 23148 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
23149 | } |
23150 | ||
ac9ec31b | 23151 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 23152 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
23153 | On exit *REF_CU is the CU of the result. |
23154 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
23155 | |
23156 | static struct die_info * | |
ac9ec31b DE |
23157 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
23158 | struct dwarf2_cu **ref_cu) | |
348e048f | 23159 | { |
348e048f | 23160 | struct die_info temp_die; |
348e048f DE |
23161 | struct dwarf2_cu *sig_cu; |
23162 | struct die_info *die; | |
23163 | ||
ac9ec31b DE |
23164 | /* While it might be nice to assert sig_type->type == NULL here, |
23165 | we can get here for DW_AT_imported_declaration where we need | |
23166 | the DIE not the type. */ | |
348e048f DE |
23167 | |
23168 | /* If necessary, add it to the queue and load its DIEs. */ | |
23169 | ||
95554aad | 23170 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 23171 | read_signatured_type (sig_type); |
348e048f | 23172 | |
348e048f | 23173 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 23174 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
23175 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
23176 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 23177 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 23178 | to_underlying (temp_die.sect_off)); |
348e048f DE |
23179 | if (die) |
23180 | { | |
796a7ff8 DE |
23181 | /* For .gdb_index version 7 keep track of included TUs. |
23182 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
23183 | if (dwarf2_per_objfile->index_table != NULL | |
23184 | && dwarf2_per_objfile->index_table->version <= 7) | |
23185 | { | |
23186 | VEC_safe_push (dwarf2_per_cu_ptr, | |
23187 | (*ref_cu)->per_cu->imported_symtabs, | |
23188 | sig_cu->per_cu); | |
23189 | } | |
23190 | ||
348e048f DE |
23191 | *ref_cu = sig_cu; |
23192 | return die; | |
23193 | } | |
23194 | ||
ac9ec31b DE |
23195 | return NULL; |
23196 | } | |
23197 | ||
23198 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
23199 | On entry *REF_CU is the CU of SRC_DIE. | |
23200 | On exit *REF_CU is the CU of the result. | |
23201 | The result is the DIE of the type. | |
23202 | If the referenced type cannot be found an error is thrown. */ | |
23203 | ||
23204 | static struct die_info * | |
ff39bb5e | 23205 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
23206 | struct dwarf2_cu **ref_cu) |
23207 | { | |
23208 | ULONGEST signature = DW_SIGNATURE (attr); | |
23209 | struct signatured_type *sig_type; | |
23210 | struct die_info *die; | |
23211 | ||
23212 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
23213 | ||
a2ce51a0 | 23214 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
23215 | /* sig_type will be NULL if the signatured type is missing from |
23216 | the debug info. */ | |
23217 | if (sig_type == NULL) | |
23218 | { | |
23219 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
23220 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 23221 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 23222 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
23223 | } |
23224 | ||
23225 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
23226 | if (die == NULL) | |
23227 | { | |
23228 | dump_die_for_error (src_die); | |
23229 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
23230 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 23231 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 23232 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
23233 | } |
23234 | ||
23235 | return die; | |
23236 | } | |
23237 | ||
23238 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
23239 | reading in and processing the type unit if necessary. */ | |
23240 | ||
23241 | static struct type * | |
23242 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
23243 | struct dwarf2_cu *cu) | |
23244 | { | |
23245 | struct signatured_type *sig_type; | |
23246 | struct dwarf2_cu *type_cu; | |
23247 | struct die_info *type_die; | |
23248 | struct type *type; | |
23249 | ||
a2ce51a0 | 23250 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
23251 | /* sig_type will be NULL if the signatured type is missing from |
23252 | the debug info. */ | |
23253 | if (sig_type == NULL) | |
23254 | { | |
23255 | complaint (&symfile_complaints, | |
23256 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
23257 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 23258 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 23259 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23260 | return build_error_marker_type (cu, die); |
23261 | } | |
23262 | ||
23263 | /* If we already know the type we're done. */ | |
23264 | if (sig_type->type != NULL) | |
23265 | return sig_type->type; | |
23266 | ||
23267 | type_cu = cu; | |
23268 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
23269 | if (type_die != NULL) | |
23270 | { | |
23271 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
23272 | is created. This is important, for example, because for c++ classes | |
23273 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
23274 | type = read_type_die (type_die, type_cu); | |
23275 | if (type == NULL) | |
23276 | { | |
23277 | complaint (&symfile_complaints, | |
23278 | _("Dwarf Error: Cannot build signatured type %s" | |
23279 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 23280 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 23281 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23282 | type = build_error_marker_type (cu, die); |
23283 | } | |
23284 | } | |
23285 | else | |
23286 | { | |
23287 | complaint (&symfile_complaints, | |
23288 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
23289 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 23290 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 23291 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23292 | type = build_error_marker_type (cu, die); |
23293 | } | |
23294 | sig_type->type = type; | |
23295 | ||
23296 | return type; | |
23297 | } | |
23298 | ||
23299 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
23300 | reading in and processing the type unit if necessary. */ | |
23301 | ||
23302 | static struct type * | |
ff39bb5e | 23303 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 23304 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
23305 | { |
23306 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 23307 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
23308 | { |
23309 | struct dwarf2_cu *type_cu = cu; | |
23310 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
23311 | ||
23312 | return read_type_die (type_die, type_cu); | |
23313 | } | |
23314 | else if (attr->form == DW_FORM_ref_sig8) | |
23315 | { | |
23316 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
23317 | } | |
23318 | else | |
23319 | { | |
23320 | complaint (&symfile_complaints, | |
23321 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
23322 | " at 0x%x [in module %s]"), | |
9c541725 | 23323 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 23324 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23325 | return build_error_marker_type (cu, die); |
23326 | } | |
348e048f DE |
23327 | } |
23328 | ||
e5fe5e75 | 23329 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
23330 | |
23331 | static void | |
e5fe5e75 | 23332 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 23333 | { |
52dc124a | 23334 | struct signatured_type *sig_type; |
348e048f | 23335 | |
f4dc4d17 DE |
23336 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
23337 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
23338 | ||
6721b2ec DE |
23339 | /* We have the per_cu, but we need the signatured_type. |
23340 | Fortunately this is an easy translation. */ | |
23341 | gdb_assert (per_cu->is_debug_types); | |
23342 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 23343 | |
6721b2ec | 23344 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23345 | |
52dc124a | 23346 | read_signatured_type (sig_type); |
348e048f | 23347 | |
6721b2ec | 23348 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
23349 | } |
23350 | ||
dee91e82 DE |
23351 | /* die_reader_func for read_signatured_type. |
23352 | This is identical to load_full_comp_unit_reader, | |
23353 | but is kept separate for now. */ | |
348e048f DE |
23354 | |
23355 | static void | |
dee91e82 | 23356 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 23357 | const gdb_byte *info_ptr, |
dee91e82 DE |
23358 | struct die_info *comp_unit_die, |
23359 | int has_children, | |
23360 | void *data) | |
348e048f | 23361 | { |
dee91e82 | 23362 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 23363 | |
dee91e82 DE |
23364 | gdb_assert (cu->die_hash == NULL); |
23365 | cu->die_hash = | |
23366 | htab_create_alloc_ex (cu->header.length / 12, | |
23367 | die_hash, | |
23368 | die_eq, | |
23369 | NULL, | |
23370 | &cu->comp_unit_obstack, | |
23371 | hashtab_obstack_allocate, | |
23372 | dummy_obstack_deallocate); | |
348e048f | 23373 | |
dee91e82 DE |
23374 | if (has_children) |
23375 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
23376 | &info_ptr, comp_unit_die); | |
23377 | cu->dies = comp_unit_die; | |
23378 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
23379 | |
23380 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 23381 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 23382 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
23383 | or we won't be able to build types correctly. |
23384 | Similarly, if we do not read the producer, we can not apply | |
23385 | producer-specific interpretation. */ | |
95554aad | 23386 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 23387 | } |
348e048f | 23388 | |
3019eac3 DE |
23389 | /* Read in a signatured type and build its CU and DIEs. |
23390 | If the type is a stub for the real type in a DWO file, | |
23391 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
23392 | |
23393 | static void | |
23394 | read_signatured_type (struct signatured_type *sig_type) | |
23395 | { | |
23396 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 23397 | |
3019eac3 | 23398 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 23399 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23400 | |
f4dc4d17 DE |
23401 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
23402 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 23403 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
23404 | } |
23405 | ||
c906108c SS |
23406 | /* Decode simple location descriptions. |
23407 | Given a pointer to a dwarf block that defines a location, compute | |
23408 | the location and return the value. | |
23409 | ||
4cecd739 DJ |
23410 | NOTE drow/2003-11-18: This function is called in two situations |
23411 | now: for the address of static or global variables (partial symbols | |
23412 | only) and for offsets into structures which are expected to be | |
23413 | (more or less) constant. The partial symbol case should go away, | |
23414 | and only the constant case should remain. That will let this | |
23415 | function complain more accurately. A few special modes are allowed | |
23416 | without complaint for global variables (for instance, global | |
23417 | register values and thread-local values). | |
c906108c SS |
23418 | |
23419 | A location description containing no operations indicates that the | |
4cecd739 | 23420 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
23421 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
23422 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
23423 | complaint. |
23424 | ||
23425 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
23426 | |
23427 | static CORE_ADDR | |
e7c27a73 | 23428 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 23429 | { |
e7c27a73 | 23430 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
23431 | size_t i; |
23432 | size_t size = blk->size; | |
d521ce57 | 23433 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
23434 | CORE_ADDR stack[64]; |
23435 | int stacki; | |
23436 | unsigned int bytes_read, unsnd; | |
23437 | gdb_byte op; | |
c906108c | 23438 | |
21ae7a4d JK |
23439 | i = 0; |
23440 | stacki = 0; | |
23441 | stack[stacki] = 0; | |
23442 | stack[++stacki] = 0; | |
23443 | ||
23444 | while (i < size) | |
23445 | { | |
23446 | op = data[i++]; | |
23447 | switch (op) | |
23448 | { | |
23449 | case DW_OP_lit0: | |
23450 | case DW_OP_lit1: | |
23451 | case DW_OP_lit2: | |
23452 | case DW_OP_lit3: | |
23453 | case DW_OP_lit4: | |
23454 | case DW_OP_lit5: | |
23455 | case DW_OP_lit6: | |
23456 | case DW_OP_lit7: | |
23457 | case DW_OP_lit8: | |
23458 | case DW_OP_lit9: | |
23459 | case DW_OP_lit10: | |
23460 | case DW_OP_lit11: | |
23461 | case DW_OP_lit12: | |
23462 | case DW_OP_lit13: | |
23463 | case DW_OP_lit14: | |
23464 | case DW_OP_lit15: | |
23465 | case DW_OP_lit16: | |
23466 | case DW_OP_lit17: | |
23467 | case DW_OP_lit18: | |
23468 | case DW_OP_lit19: | |
23469 | case DW_OP_lit20: | |
23470 | case DW_OP_lit21: | |
23471 | case DW_OP_lit22: | |
23472 | case DW_OP_lit23: | |
23473 | case DW_OP_lit24: | |
23474 | case DW_OP_lit25: | |
23475 | case DW_OP_lit26: | |
23476 | case DW_OP_lit27: | |
23477 | case DW_OP_lit28: | |
23478 | case DW_OP_lit29: | |
23479 | case DW_OP_lit30: | |
23480 | case DW_OP_lit31: | |
23481 | stack[++stacki] = op - DW_OP_lit0; | |
23482 | break; | |
f1bea926 | 23483 | |
21ae7a4d JK |
23484 | case DW_OP_reg0: |
23485 | case DW_OP_reg1: | |
23486 | case DW_OP_reg2: | |
23487 | case DW_OP_reg3: | |
23488 | case DW_OP_reg4: | |
23489 | case DW_OP_reg5: | |
23490 | case DW_OP_reg6: | |
23491 | case DW_OP_reg7: | |
23492 | case DW_OP_reg8: | |
23493 | case DW_OP_reg9: | |
23494 | case DW_OP_reg10: | |
23495 | case DW_OP_reg11: | |
23496 | case DW_OP_reg12: | |
23497 | case DW_OP_reg13: | |
23498 | case DW_OP_reg14: | |
23499 | case DW_OP_reg15: | |
23500 | case DW_OP_reg16: | |
23501 | case DW_OP_reg17: | |
23502 | case DW_OP_reg18: | |
23503 | case DW_OP_reg19: | |
23504 | case DW_OP_reg20: | |
23505 | case DW_OP_reg21: | |
23506 | case DW_OP_reg22: | |
23507 | case DW_OP_reg23: | |
23508 | case DW_OP_reg24: | |
23509 | case DW_OP_reg25: | |
23510 | case DW_OP_reg26: | |
23511 | case DW_OP_reg27: | |
23512 | case DW_OP_reg28: | |
23513 | case DW_OP_reg29: | |
23514 | case DW_OP_reg30: | |
23515 | case DW_OP_reg31: | |
23516 | stack[++stacki] = op - DW_OP_reg0; | |
23517 | if (i < size) | |
23518 | dwarf2_complex_location_expr_complaint (); | |
23519 | break; | |
c906108c | 23520 | |
21ae7a4d JK |
23521 | case DW_OP_regx: |
23522 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
23523 | i += bytes_read; | |
23524 | stack[++stacki] = unsnd; | |
23525 | if (i < size) | |
23526 | dwarf2_complex_location_expr_complaint (); | |
23527 | break; | |
c906108c | 23528 | |
21ae7a4d JK |
23529 | case DW_OP_addr: |
23530 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
23531 | cu, &bytes_read); | |
23532 | i += bytes_read; | |
23533 | break; | |
d53d4ac5 | 23534 | |
21ae7a4d JK |
23535 | case DW_OP_const1u: |
23536 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
23537 | i += 1; | |
23538 | break; | |
23539 | ||
23540 | case DW_OP_const1s: | |
23541 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
23542 | i += 1; | |
23543 | break; | |
23544 | ||
23545 | case DW_OP_const2u: | |
23546 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
23547 | i += 2; | |
23548 | break; | |
23549 | ||
23550 | case DW_OP_const2s: | |
23551 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
23552 | i += 2; | |
23553 | break; | |
d53d4ac5 | 23554 | |
21ae7a4d JK |
23555 | case DW_OP_const4u: |
23556 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
23557 | i += 4; | |
23558 | break; | |
23559 | ||
23560 | case DW_OP_const4s: | |
23561 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
23562 | i += 4; | |
23563 | break; | |
23564 | ||
585861ea JK |
23565 | case DW_OP_const8u: |
23566 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
23567 | i += 8; | |
23568 | break; | |
23569 | ||
21ae7a4d JK |
23570 | case DW_OP_constu: |
23571 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
23572 | &bytes_read); | |
23573 | i += bytes_read; | |
23574 | break; | |
23575 | ||
23576 | case DW_OP_consts: | |
23577 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
23578 | i += bytes_read; | |
23579 | break; | |
23580 | ||
23581 | case DW_OP_dup: | |
23582 | stack[stacki + 1] = stack[stacki]; | |
23583 | stacki++; | |
23584 | break; | |
23585 | ||
23586 | case DW_OP_plus: | |
23587 | stack[stacki - 1] += stack[stacki]; | |
23588 | stacki--; | |
23589 | break; | |
23590 | ||
23591 | case DW_OP_plus_uconst: | |
23592 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
23593 | &bytes_read); | |
23594 | i += bytes_read; | |
23595 | break; | |
23596 | ||
23597 | case DW_OP_minus: | |
23598 | stack[stacki - 1] -= stack[stacki]; | |
23599 | stacki--; | |
23600 | break; | |
23601 | ||
23602 | case DW_OP_deref: | |
23603 | /* If we're not the last op, then we definitely can't encode | |
23604 | this using GDB's address_class enum. This is valid for partial | |
23605 | global symbols, although the variable's address will be bogus | |
23606 | in the psymtab. */ | |
23607 | if (i < size) | |
23608 | dwarf2_complex_location_expr_complaint (); | |
23609 | break; | |
23610 | ||
23611 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 23612 | case DW_OP_form_tls_address: |
21ae7a4d JK |
23613 | /* The top of the stack has the offset from the beginning |
23614 | of the thread control block at which the variable is located. */ | |
23615 | /* Nothing should follow this operator, so the top of stack would | |
23616 | be returned. */ | |
23617 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
23618 | address will be bogus in the psymtab. Make it always at least |
23619 | non-zero to not look as a variable garbage collected by linker | |
23620 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
23621 | if (i < size) |
23622 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 23623 | stack[stacki]++; |
21ae7a4d JK |
23624 | break; |
23625 | ||
23626 | case DW_OP_GNU_uninit: | |
23627 | break; | |
23628 | ||
3019eac3 | 23629 | case DW_OP_GNU_addr_index: |
49f6c839 | 23630 | case DW_OP_GNU_const_index: |
3019eac3 DE |
23631 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
23632 | &bytes_read); | |
23633 | i += bytes_read; | |
23634 | break; | |
23635 | ||
21ae7a4d JK |
23636 | default: |
23637 | { | |
f39c6ffd | 23638 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
23639 | |
23640 | if (name) | |
23641 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
23642 | name); | |
23643 | else | |
23644 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
23645 | op); | |
23646 | } | |
23647 | ||
23648 | return (stack[stacki]); | |
d53d4ac5 | 23649 | } |
3c6e0cb3 | 23650 | |
21ae7a4d JK |
23651 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
23652 | outside of the allocated space. Also enforce minimum>0. */ | |
23653 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
23654 | { | |
23655 | complaint (&symfile_complaints, | |
23656 | _("location description stack overflow")); | |
23657 | return 0; | |
23658 | } | |
23659 | ||
23660 | if (stacki <= 0) | |
23661 | { | |
23662 | complaint (&symfile_complaints, | |
23663 | _("location description stack underflow")); | |
23664 | return 0; | |
23665 | } | |
23666 | } | |
23667 | return (stack[stacki]); | |
c906108c SS |
23668 | } |
23669 | ||
23670 | /* memory allocation interface */ | |
23671 | ||
c906108c | 23672 | static struct dwarf_block * |
7b5a2f43 | 23673 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 23674 | { |
8d749320 | 23675 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
23676 | } |
23677 | ||
c906108c | 23678 | static struct die_info * |
b60c80d6 | 23679 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
23680 | { |
23681 | struct die_info *die; | |
b60c80d6 DJ |
23682 | size_t size = sizeof (struct die_info); |
23683 | ||
23684 | if (num_attrs > 1) | |
23685 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 23686 | |
b60c80d6 | 23687 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
23688 | memset (die, 0, sizeof (struct die_info)); |
23689 | return (die); | |
23690 | } | |
2e276125 JB |
23691 | |
23692 | \f | |
23693 | /* Macro support. */ | |
23694 | ||
233d95b5 JK |
23695 | /* Return file name relative to the compilation directory of file number I in |
23696 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 23697 | responsible for freeing it. */ |
233d95b5 | 23698 | |
2e276125 | 23699 | static char * |
233d95b5 | 23700 | file_file_name (int file, struct line_header *lh) |
2e276125 | 23701 | { |
6a83a1e6 EZ |
23702 | /* Is the file number a valid index into the line header's file name |
23703 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 23704 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 23705 | { |
8c43009f | 23706 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 23707 | |
8c43009f PA |
23708 | if (!IS_ABSOLUTE_PATH (fe.name)) |
23709 | { | |
23710 | const char *dir = fe.include_dir (lh); | |
23711 | if (dir != NULL) | |
23712 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
23713 | } | |
23714 | return xstrdup (fe.name); | |
6a83a1e6 | 23715 | } |
2e276125 JB |
23716 | else |
23717 | { | |
6a83a1e6 EZ |
23718 | /* The compiler produced a bogus file number. We can at least |
23719 | record the macro definitions made in the file, even if we | |
23720 | won't be able to find the file by name. */ | |
23721 | char fake_name[80]; | |
9a619af0 | 23722 | |
8c042590 PM |
23723 | xsnprintf (fake_name, sizeof (fake_name), |
23724 | "<bad macro file number %d>", file); | |
2e276125 | 23725 | |
6e70227d | 23726 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
23727 | _("bad file number in macro information (%d)"), |
23728 | file); | |
2e276125 | 23729 | |
6a83a1e6 | 23730 | return xstrdup (fake_name); |
2e276125 JB |
23731 | } |
23732 | } | |
23733 | ||
233d95b5 JK |
23734 | /* Return the full name of file number I in *LH's file name table. |
23735 | Use COMP_DIR as the name of the current directory of the | |
23736 | compilation. The result is allocated using xmalloc; the caller is | |
23737 | responsible for freeing it. */ | |
23738 | static char * | |
23739 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
23740 | { | |
23741 | /* Is the file number a valid index into the line header's file name | |
23742 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 23743 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
23744 | { |
23745 | char *relative = file_file_name (file, lh); | |
23746 | ||
23747 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
23748 | return relative; | |
b36cec19 PA |
23749 | return reconcat (relative, comp_dir, SLASH_STRING, |
23750 | relative, (char *) NULL); | |
233d95b5 JK |
23751 | } |
23752 | else | |
23753 | return file_file_name (file, lh); | |
23754 | } | |
23755 | ||
2e276125 JB |
23756 | |
23757 | static struct macro_source_file * | |
23758 | macro_start_file (int file, int line, | |
23759 | struct macro_source_file *current_file, | |
43f3e411 | 23760 | struct line_header *lh) |
2e276125 | 23761 | { |
233d95b5 JK |
23762 | /* File name relative to the compilation directory of this source file. */ |
23763 | char *file_name = file_file_name (file, lh); | |
2e276125 | 23764 | |
2e276125 | 23765 | if (! current_file) |
abc9d0dc | 23766 | { |
fc474241 DE |
23767 | /* Note: We don't create a macro table for this compilation unit |
23768 | at all until we actually get a filename. */ | |
43f3e411 | 23769 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 23770 | |
abc9d0dc TT |
23771 | /* If we have no current file, then this must be the start_file |
23772 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
23773 | current_file = macro_set_main (macro_table, file_name); |
23774 | macro_define_special (macro_table); | |
abc9d0dc | 23775 | } |
2e276125 | 23776 | else |
233d95b5 | 23777 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 23778 | |
233d95b5 | 23779 | xfree (file_name); |
6e70227d | 23780 | |
2e276125 JB |
23781 | return current_file; |
23782 | } | |
23783 | ||
2e276125 JB |
23784 | static const char * |
23785 | consume_improper_spaces (const char *p, const char *body) | |
23786 | { | |
23787 | if (*p == ' ') | |
23788 | { | |
4d3c2250 | 23789 | complaint (&symfile_complaints, |
3e43a32a MS |
23790 | _("macro definition contains spaces " |
23791 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 23792 | body); |
2e276125 JB |
23793 | |
23794 | while (*p == ' ') | |
23795 | p++; | |
23796 | } | |
23797 | ||
23798 | return p; | |
23799 | } | |
23800 | ||
23801 | ||
23802 | static void | |
23803 | parse_macro_definition (struct macro_source_file *file, int line, | |
23804 | const char *body) | |
23805 | { | |
23806 | const char *p; | |
23807 | ||
23808 | /* The body string takes one of two forms. For object-like macro | |
23809 | definitions, it should be: | |
23810 | ||
23811 | <macro name> " " <definition> | |
23812 | ||
23813 | For function-like macro definitions, it should be: | |
23814 | ||
23815 | <macro name> "() " <definition> | |
23816 | or | |
23817 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
23818 | ||
23819 | Spaces may appear only where explicitly indicated, and in the | |
23820 | <definition>. | |
23821 | ||
23822 | The Dwarf 2 spec says that an object-like macro's name is always | |
23823 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 23824 | the space when the macro's definition is the empty string. |
2e276125 JB |
23825 | |
23826 | The Dwarf 2 spec says that there should be no spaces between the | |
23827 | formal arguments in a function-like macro's formal argument list, | |
23828 | but versions of GCC around March 2002 include spaces after the | |
23829 | commas. */ | |
23830 | ||
23831 | ||
23832 | /* Find the extent of the macro name. The macro name is terminated | |
23833 | by either a space or null character (for an object-like macro) or | |
23834 | an opening paren (for a function-like macro). */ | |
23835 | for (p = body; *p; p++) | |
23836 | if (*p == ' ' || *p == '(') | |
23837 | break; | |
23838 | ||
23839 | if (*p == ' ' || *p == '\0') | |
23840 | { | |
23841 | /* It's an object-like macro. */ | |
23842 | int name_len = p - body; | |
3f8a7804 | 23843 | char *name = savestring (body, name_len); |
2e276125 JB |
23844 | const char *replacement; |
23845 | ||
23846 | if (*p == ' ') | |
23847 | replacement = body + name_len + 1; | |
23848 | else | |
23849 | { | |
4d3c2250 | 23850 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23851 | replacement = body + name_len; |
23852 | } | |
6e70227d | 23853 | |
2e276125 JB |
23854 | macro_define_object (file, line, name, replacement); |
23855 | ||
23856 | xfree (name); | |
23857 | } | |
23858 | else if (*p == '(') | |
23859 | { | |
23860 | /* It's a function-like macro. */ | |
3f8a7804 | 23861 | char *name = savestring (body, p - body); |
2e276125 JB |
23862 | int argc = 0; |
23863 | int argv_size = 1; | |
8d749320 | 23864 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
23865 | |
23866 | p++; | |
23867 | ||
23868 | p = consume_improper_spaces (p, body); | |
23869 | ||
23870 | /* Parse the formal argument list. */ | |
23871 | while (*p && *p != ')') | |
23872 | { | |
23873 | /* Find the extent of the current argument name. */ | |
23874 | const char *arg_start = p; | |
23875 | ||
23876 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
23877 | p++; | |
23878 | ||
23879 | if (! *p || p == arg_start) | |
4d3c2250 | 23880 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23881 | else |
23882 | { | |
23883 | /* Make sure argv has room for the new argument. */ | |
23884 | if (argc >= argv_size) | |
23885 | { | |
23886 | argv_size *= 2; | |
224c3ddb | 23887 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
23888 | } |
23889 | ||
3f8a7804 | 23890 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
23891 | } |
23892 | ||
23893 | p = consume_improper_spaces (p, body); | |
23894 | ||
23895 | /* Consume the comma, if present. */ | |
23896 | if (*p == ',') | |
23897 | { | |
23898 | p++; | |
23899 | ||
23900 | p = consume_improper_spaces (p, body); | |
23901 | } | |
23902 | } | |
23903 | ||
23904 | if (*p == ')') | |
23905 | { | |
23906 | p++; | |
23907 | ||
23908 | if (*p == ' ') | |
23909 | /* Perfectly formed definition, no complaints. */ | |
23910 | macro_define_function (file, line, name, | |
6e70227d | 23911 | argc, (const char **) argv, |
2e276125 JB |
23912 | p + 1); |
23913 | else if (*p == '\0') | |
23914 | { | |
23915 | /* Complain, but do define it. */ | |
4d3c2250 | 23916 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 23917 | macro_define_function (file, line, name, |
6e70227d | 23918 | argc, (const char **) argv, |
2e276125 JB |
23919 | p); |
23920 | } | |
23921 | else | |
23922 | /* Just complain. */ | |
4d3c2250 | 23923 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23924 | } |
23925 | else | |
23926 | /* Just complain. */ | |
4d3c2250 | 23927 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23928 | |
23929 | xfree (name); | |
23930 | { | |
23931 | int i; | |
23932 | ||
23933 | for (i = 0; i < argc; i++) | |
23934 | xfree (argv[i]); | |
23935 | } | |
23936 | xfree (argv); | |
23937 | } | |
23938 | else | |
4d3c2250 | 23939 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23940 | } |
23941 | ||
cf2c3c16 TT |
23942 | /* Skip some bytes from BYTES according to the form given in FORM. |
23943 | Returns the new pointer. */ | |
2e276125 | 23944 | |
d521ce57 TT |
23945 | static const gdb_byte * |
23946 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
23947 | enum dwarf_form form, |
23948 | unsigned int offset_size, | |
23949 | struct dwarf2_section_info *section) | |
2e276125 | 23950 | { |
cf2c3c16 | 23951 | unsigned int bytes_read; |
2e276125 | 23952 | |
cf2c3c16 | 23953 | switch (form) |
2e276125 | 23954 | { |
cf2c3c16 TT |
23955 | case DW_FORM_data1: |
23956 | case DW_FORM_flag: | |
23957 | ++bytes; | |
23958 | break; | |
23959 | ||
23960 | case DW_FORM_data2: | |
23961 | bytes += 2; | |
23962 | break; | |
23963 | ||
23964 | case DW_FORM_data4: | |
23965 | bytes += 4; | |
23966 | break; | |
23967 | ||
23968 | case DW_FORM_data8: | |
23969 | bytes += 8; | |
23970 | break; | |
23971 | ||
0224619f JK |
23972 | case DW_FORM_data16: |
23973 | bytes += 16; | |
23974 | break; | |
23975 | ||
cf2c3c16 TT |
23976 | case DW_FORM_string: |
23977 | read_direct_string (abfd, bytes, &bytes_read); | |
23978 | bytes += bytes_read; | |
23979 | break; | |
23980 | ||
23981 | case DW_FORM_sec_offset: | |
23982 | case DW_FORM_strp: | |
36586728 | 23983 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
23984 | bytes += offset_size; |
23985 | break; | |
23986 | ||
23987 | case DW_FORM_block: | |
23988 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
23989 | bytes += bytes_read; | |
23990 | break; | |
23991 | ||
23992 | case DW_FORM_block1: | |
23993 | bytes += 1 + read_1_byte (abfd, bytes); | |
23994 | break; | |
23995 | case DW_FORM_block2: | |
23996 | bytes += 2 + read_2_bytes (abfd, bytes); | |
23997 | break; | |
23998 | case DW_FORM_block4: | |
23999 | bytes += 4 + read_4_bytes (abfd, bytes); | |
24000 | break; | |
24001 | ||
24002 | case DW_FORM_sdata: | |
24003 | case DW_FORM_udata: | |
3019eac3 DE |
24004 | case DW_FORM_GNU_addr_index: |
24005 | case DW_FORM_GNU_str_index: | |
d521ce57 | 24006 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
24007 | if (bytes == NULL) |
24008 | { | |
24009 | dwarf2_section_buffer_overflow_complaint (section); | |
24010 | return NULL; | |
24011 | } | |
cf2c3c16 TT |
24012 | break; |
24013 | ||
663c44ac JK |
24014 | case DW_FORM_implicit_const: |
24015 | break; | |
24016 | ||
cf2c3c16 TT |
24017 | default: |
24018 | { | |
cf2c3c16 TT |
24019 | complaint (&symfile_complaints, |
24020 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 24021 | form, get_section_name (section)); |
cf2c3c16 TT |
24022 | return NULL; |
24023 | } | |
2e276125 JB |
24024 | } |
24025 | ||
cf2c3c16 TT |
24026 | return bytes; |
24027 | } | |
757a13d0 | 24028 | |
cf2c3c16 TT |
24029 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
24030 | opcode. Returns an updated pointer to the macro data buffer; or, | |
24031 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 24032 | |
d521ce57 | 24033 | static const gdb_byte * |
cf2c3c16 | 24034 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
24035 | const gdb_byte **opcode_definitions, |
24036 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
24037 | bfd *abfd, |
24038 | unsigned int offset_size, | |
24039 | struct dwarf2_section_info *section) | |
24040 | { | |
24041 | unsigned int bytes_read, i; | |
24042 | unsigned long arg; | |
d521ce57 | 24043 | const gdb_byte *defn; |
2e276125 | 24044 | |
cf2c3c16 | 24045 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 24046 | { |
cf2c3c16 TT |
24047 | complaint (&symfile_complaints, |
24048 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
24049 | opcode); | |
24050 | return NULL; | |
24051 | } | |
2e276125 | 24052 | |
cf2c3c16 TT |
24053 | defn = opcode_definitions[opcode]; |
24054 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
24055 | defn += bytes_read; | |
2e276125 | 24056 | |
cf2c3c16 TT |
24057 | for (i = 0; i < arg; ++i) |
24058 | { | |
aead7601 SM |
24059 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
24060 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 24061 | section); |
cf2c3c16 TT |
24062 | if (mac_ptr == NULL) |
24063 | { | |
24064 | /* skip_form_bytes already issued the complaint. */ | |
24065 | return NULL; | |
24066 | } | |
24067 | } | |
757a13d0 | 24068 | |
cf2c3c16 TT |
24069 | return mac_ptr; |
24070 | } | |
757a13d0 | 24071 | |
cf2c3c16 TT |
24072 | /* A helper function which parses the header of a macro section. |
24073 | If the macro section is the extended (for now called "GNU") type, | |
24074 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
24075 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 24076 | |
d521ce57 TT |
24077 | static const gdb_byte * |
24078 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 24079 | bfd *abfd, |
d521ce57 | 24080 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
24081 | unsigned int *offset_size, |
24082 | int section_is_gnu) | |
24083 | { | |
24084 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 24085 | |
cf2c3c16 TT |
24086 | if (section_is_gnu) |
24087 | { | |
24088 | unsigned int version, flags; | |
757a13d0 | 24089 | |
cf2c3c16 | 24090 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 24091 | if (version != 4 && version != 5) |
cf2c3c16 TT |
24092 | { |
24093 | complaint (&symfile_complaints, | |
24094 | _("unrecognized version `%d' in .debug_macro section"), | |
24095 | version); | |
24096 | return NULL; | |
24097 | } | |
24098 | mac_ptr += 2; | |
757a13d0 | 24099 | |
cf2c3c16 TT |
24100 | flags = read_1_byte (abfd, mac_ptr); |
24101 | ++mac_ptr; | |
24102 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 24103 | |
cf2c3c16 TT |
24104 | if ((flags & 2) != 0) |
24105 | /* We don't need the line table offset. */ | |
24106 | mac_ptr += *offset_size; | |
757a13d0 | 24107 | |
cf2c3c16 TT |
24108 | /* Vendor opcode descriptions. */ |
24109 | if ((flags & 4) != 0) | |
24110 | { | |
24111 | unsigned int i, count; | |
757a13d0 | 24112 | |
cf2c3c16 TT |
24113 | count = read_1_byte (abfd, mac_ptr); |
24114 | ++mac_ptr; | |
24115 | for (i = 0; i < count; ++i) | |
24116 | { | |
24117 | unsigned int opcode, bytes_read; | |
24118 | unsigned long arg; | |
24119 | ||
24120 | opcode = read_1_byte (abfd, mac_ptr); | |
24121 | ++mac_ptr; | |
24122 | opcode_definitions[opcode] = mac_ptr; | |
24123 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24124 | mac_ptr += bytes_read; | |
24125 | mac_ptr += arg; | |
24126 | } | |
757a13d0 | 24127 | } |
cf2c3c16 | 24128 | } |
757a13d0 | 24129 | |
cf2c3c16 TT |
24130 | return mac_ptr; |
24131 | } | |
757a13d0 | 24132 | |
cf2c3c16 | 24133 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 24134 | including DW_MACRO_import. */ |
cf2c3c16 TT |
24135 | |
24136 | static void | |
d521ce57 TT |
24137 | dwarf_decode_macro_bytes (bfd *abfd, |
24138 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 24139 | struct macro_source_file *current_file, |
43f3e411 | 24140 | struct line_header *lh, |
cf2c3c16 | 24141 | struct dwarf2_section_info *section, |
36586728 | 24142 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 24143 | unsigned int offset_size, |
8fc3fc34 | 24144 | htab_t include_hash) |
cf2c3c16 | 24145 | { |
4d663531 | 24146 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
24147 | enum dwarf_macro_record_type macinfo_type; |
24148 | int at_commandline; | |
d521ce57 | 24149 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 24150 | |
cf2c3c16 TT |
24151 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
24152 | &offset_size, section_is_gnu); | |
24153 | if (mac_ptr == NULL) | |
24154 | { | |
24155 | /* We already issued a complaint. */ | |
24156 | return; | |
24157 | } | |
757a13d0 JK |
24158 | |
24159 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
24160 | GDB is still reading the definitions from command line. First | |
24161 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
24162 | to create CURRENT_FILE for the main source holding also the command line | |
24163 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
24164 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
24165 | ||
24166 | at_commandline = 1; | |
24167 | ||
24168 | do | |
24169 | { | |
24170 | /* Do we at least have room for a macinfo type byte? */ | |
24171 | if (mac_ptr >= mac_end) | |
24172 | { | |
f664829e | 24173 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
24174 | break; |
24175 | } | |
24176 | ||
aead7601 | 24177 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
24178 | mac_ptr++; |
24179 | ||
cf2c3c16 TT |
24180 | /* Note that we rely on the fact that the corresponding GNU and |
24181 | DWARF constants are the same. */ | |
757a13d0 JK |
24182 | switch (macinfo_type) |
24183 | { | |
24184 | /* A zero macinfo type indicates the end of the macro | |
24185 | information. */ | |
24186 | case 0: | |
24187 | break; | |
2e276125 | 24188 | |
0af92d60 JK |
24189 | case DW_MACRO_define: |
24190 | case DW_MACRO_undef: | |
24191 | case DW_MACRO_define_strp: | |
24192 | case DW_MACRO_undef_strp: | |
24193 | case DW_MACRO_define_sup: | |
24194 | case DW_MACRO_undef_sup: | |
2e276125 | 24195 | { |
891d2f0b | 24196 | unsigned int bytes_read; |
2e276125 | 24197 | int line; |
d521ce57 | 24198 | const char *body; |
cf2c3c16 | 24199 | int is_define; |
2e276125 | 24200 | |
cf2c3c16 TT |
24201 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
24202 | mac_ptr += bytes_read; | |
24203 | ||
0af92d60 JK |
24204 | if (macinfo_type == DW_MACRO_define |
24205 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
24206 | { |
24207 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
24208 | mac_ptr += bytes_read; | |
24209 | } | |
24210 | else | |
24211 | { | |
24212 | LONGEST str_offset; | |
24213 | ||
24214 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24215 | mac_ptr += offset_size; | |
2e276125 | 24216 | |
0af92d60 JK |
24217 | if (macinfo_type == DW_MACRO_define_sup |
24218 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 24219 | || section_is_dwz) |
36586728 TT |
24220 | { |
24221 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
24222 | ||
24223 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
24224 | } | |
24225 | else | |
24226 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
24227 | } |
24228 | ||
0af92d60 JK |
24229 | is_define = (macinfo_type == DW_MACRO_define |
24230 | || macinfo_type == DW_MACRO_define_strp | |
24231 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 24232 | if (! current_file) |
757a13d0 JK |
24233 | { |
24234 | /* DWARF violation as no main source is present. */ | |
24235 | complaint (&symfile_complaints, | |
24236 | _("debug info with no main source gives macro %s " | |
24237 | "on line %d: %s"), | |
cf2c3c16 TT |
24238 | is_define ? _("definition") : _("undefinition"), |
24239 | line, body); | |
757a13d0 JK |
24240 | break; |
24241 | } | |
3e43a32a MS |
24242 | if ((line == 0 && !at_commandline) |
24243 | || (line != 0 && at_commandline)) | |
4d3c2250 | 24244 | complaint (&symfile_complaints, |
757a13d0 JK |
24245 | _("debug info gives %s macro %s with %s line %d: %s"), |
24246 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 24247 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
24248 | line == 0 ? _("zero") : _("non-zero"), line, body); |
24249 | ||
cf2c3c16 | 24250 | if (is_define) |
757a13d0 | 24251 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
24252 | else |
24253 | { | |
0af92d60 JK |
24254 | gdb_assert (macinfo_type == DW_MACRO_undef |
24255 | || macinfo_type == DW_MACRO_undef_strp | |
24256 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
24257 | macro_undef (current_file, line, body); |
24258 | } | |
2e276125 JB |
24259 | } |
24260 | break; | |
24261 | ||
0af92d60 | 24262 | case DW_MACRO_start_file: |
2e276125 | 24263 | { |
891d2f0b | 24264 | unsigned int bytes_read; |
2e276125 JB |
24265 | int line, file; |
24266 | ||
24267 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24268 | mac_ptr += bytes_read; | |
24269 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24270 | mac_ptr += bytes_read; | |
24271 | ||
3e43a32a MS |
24272 | if ((line == 0 && !at_commandline) |
24273 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
24274 | complaint (&symfile_complaints, |
24275 | _("debug info gives source %d included " | |
24276 | "from %s at %s line %d"), | |
24277 | file, at_commandline ? _("command-line") : _("file"), | |
24278 | line == 0 ? _("zero") : _("non-zero"), line); | |
24279 | ||
24280 | if (at_commandline) | |
24281 | { | |
0af92d60 | 24282 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 24283 | pass one. */ |
757a13d0 JK |
24284 | at_commandline = 0; |
24285 | } | |
24286 | else | |
43f3e411 | 24287 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
24288 | } |
24289 | break; | |
24290 | ||
0af92d60 | 24291 | case DW_MACRO_end_file: |
2e276125 | 24292 | if (! current_file) |
4d3c2250 | 24293 | complaint (&symfile_complaints, |
3e43a32a MS |
24294 | _("macro debug info has an unmatched " |
24295 | "`close_file' directive")); | |
2e276125 JB |
24296 | else |
24297 | { | |
24298 | current_file = current_file->included_by; | |
24299 | if (! current_file) | |
24300 | { | |
cf2c3c16 | 24301 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
24302 | |
24303 | /* GCC circa March 2002 doesn't produce the zero | |
24304 | type byte marking the end of the compilation | |
24305 | unit. Complain if it's not there, but exit no | |
24306 | matter what. */ | |
24307 | ||
24308 | /* Do we at least have room for a macinfo type byte? */ | |
24309 | if (mac_ptr >= mac_end) | |
24310 | { | |
f664829e | 24311 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
24312 | return; |
24313 | } | |
24314 | ||
24315 | /* We don't increment mac_ptr here, so this is just | |
24316 | a look-ahead. */ | |
aead7601 SM |
24317 | next_type |
24318 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
24319 | mac_ptr); | |
2e276125 | 24320 | if (next_type != 0) |
4d3c2250 | 24321 | complaint (&symfile_complaints, |
3e43a32a MS |
24322 | _("no terminating 0-type entry for " |
24323 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
24324 | |
24325 | return; | |
24326 | } | |
24327 | } | |
24328 | break; | |
24329 | ||
0af92d60 JK |
24330 | case DW_MACRO_import: |
24331 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
24332 | { |
24333 | LONGEST offset; | |
8fc3fc34 | 24334 | void **slot; |
a036ba48 TT |
24335 | bfd *include_bfd = abfd; |
24336 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 24337 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 24338 | int is_dwz = section_is_dwz; |
d521ce57 | 24339 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
24340 | |
24341 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24342 | mac_ptr += offset_size; | |
24343 | ||
0af92d60 | 24344 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
24345 | { |
24346 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
24347 | ||
4d663531 | 24348 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 24349 | |
a036ba48 | 24350 | include_section = &dwz->macro; |
a32a8923 | 24351 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
24352 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
24353 | is_dwz = 1; | |
24354 | } | |
24355 | ||
24356 | new_mac_ptr = include_section->buffer + offset; | |
24357 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
24358 | ||
8fc3fc34 TT |
24359 | if (*slot != NULL) |
24360 | { | |
24361 | /* This has actually happened; see | |
24362 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
24363 | complaint (&symfile_complaints, | |
0af92d60 | 24364 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
24365 | ".debug_macro section")); |
24366 | } | |
24367 | else | |
24368 | { | |
d521ce57 | 24369 | *slot = (void *) new_mac_ptr; |
36586728 | 24370 | |
a036ba48 | 24371 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 24372 | include_mac_end, current_file, lh, |
36586728 | 24373 | section, section_is_gnu, is_dwz, |
4d663531 | 24374 | offset_size, include_hash); |
8fc3fc34 | 24375 | |
d521ce57 | 24376 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 24377 | } |
cf2c3c16 TT |
24378 | } |
24379 | break; | |
24380 | ||
2e276125 | 24381 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
24382 | if (!section_is_gnu) |
24383 | { | |
24384 | unsigned int bytes_read; | |
2e276125 | 24385 | |
ac298888 TT |
24386 | /* This reads the constant, but since we don't recognize |
24387 | any vendor extensions, we ignore it. */ | |
24388 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
24389 | mac_ptr += bytes_read; |
24390 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24391 | mac_ptr += bytes_read; | |
2e276125 | 24392 | |
cf2c3c16 TT |
24393 | /* We don't recognize any vendor extensions. */ |
24394 | break; | |
24395 | } | |
24396 | /* FALLTHROUGH */ | |
24397 | ||
24398 | default: | |
24399 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 24400 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
24401 | section); |
24402 | if (mac_ptr == NULL) | |
24403 | return; | |
24404 | break; | |
2e276125 | 24405 | } |
757a13d0 | 24406 | } while (macinfo_type != 0); |
2e276125 | 24407 | } |
8e19ed76 | 24408 | |
cf2c3c16 | 24409 | static void |
09262596 | 24410 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 24411 | int section_is_gnu) |
cf2c3c16 | 24412 | { |
bb5ed363 | 24413 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
24414 | struct line_header *lh = cu->line_header; |
24415 | bfd *abfd; | |
d521ce57 | 24416 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
24417 | struct macro_source_file *current_file = 0; |
24418 | enum dwarf_macro_record_type macinfo_type; | |
24419 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 24420 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 24421 | void **slot; |
09262596 DE |
24422 | struct dwarf2_section_info *section; |
24423 | const char *section_name; | |
24424 | ||
24425 | if (cu->dwo_unit != NULL) | |
24426 | { | |
24427 | if (section_is_gnu) | |
24428 | { | |
24429 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
24430 | section_name = ".debug_macro.dwo"; | |
24431 | } | |
24432 | else | |
24433 | { | |
24434 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
24435 | section_name = ".debug_macinfo.dwo"; | |
24436 | } | |
24437 | } | |
24438 | else | |
24439 | { | |
24440 | if (section_is_gnu) | |
24441 | { | |
24442 | section = &dwarf2_per_objfile->macro; | |
24443 | section_name = ".debug_macro"; | |
24444 | } | |
24445 | else | |
24446 | { | |
24447 | section = &dwarf2_per_objfile->macinfo; | |
24448 | section_name = ".debug_macinfo"; | |
24449 | } | |
24450 | } | |
cf2c3c16 | 24451 | |
bb5ed363 | 24452 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
24453 | if (section->buffer == NULL) |
24454 | { | |
fceca515 | 24455 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
24456 | return; |
24457 | } | |
a32a8923 | 24458 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
24459 | |
24460 | /* First pass: Find the name of the base filename. | |
24461 | This filename is needed in order to process all macros whose definition | |
24462 | (or undefinition) comes from the command line. These macros are defined | |
24463 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
24464 | associated to the base file. | |
24465 | ||
24466 | To determine the base file name, we scan the macro definitions until we | |
24467 | reach the first DW_MACINFO_start_file entry. We then initialize | |
24468 | CURRENT_FILE accordingly so that any macro definition found before the | |
24469 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
24470 | ||
24471 | mac_ptr = section->buffer + offset; | |
24472 | mac_end = section->buffer + section->size; | |
24473 | ||
24474 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
24475 | &offset_size, section_is_gnu); | |
24476 | if (mac_ptr == NULL) | |
24477 | { | |
24478 | /* We already issued a complaint. */ | |
24479 | return; | |
24480 | } | |
24481 | ||
24482 | do | |
24483 | { | |
24484 | /* Do we at least have room for a macinfo type byte? */ | |
24485 | if (mac_ptr >= mac_end) | |
24486 | { | |
24487 | /* Complaint is printed during the second pass as GDB will probably | |
24488 | stop the first pass earlier upon finding | |
24489 | DW_MACINFO_start_file. */ | |
24490 | break; | |
24491 | } | |
24492 | ||
aead7601 | 24493 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
24494 | mac_ptr++; |
24495 | ||
24496 | /* Note that we rely on the fact that the corresponding GNU and | |
24497 | DWARF constants are the same. */ | |
24498 | switch (macinfo_type) | |
24499 | { | |
24500 | /* A zero macinfo type indicates the end of the macro | |
24501 | information. */ | |
24502 | case 0: | |
24503 | break; | |
24504 | ||
0af92d60 JK |
24505 | case DW_MACRO_define: |
24506 | case DW_MACRO_undef: | |
cf2c3c16 TT |
24507 | /* Only skip the data by MAC_PTR. */ |
24508 | { | |
24509 | unsigned int bytes_read; | |
24510 | ||
24511 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24512 | mac_ptr += bytes_read; | |
24513 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24514 | mac_ptr += bytes_read; | |
24515 | } | |
24516 | break; | |
24517 | ||
0af92d60 | 24518 | case DW_MACRO_start_file: |
cf2c3c16 TT |
24519 | { |
24520 | unsigned int bytes_read; | |
24521 | int line, file; | |
24522 | ||
24523 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24524 | mac_ptr += bytes_read; | |
24525 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24526 | mac_ptr += bytes_read; | |
24527 | ||
43f3e411 | 24528 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
24529 | } |
24530 | break; | |
24531 | ||
0af92d60 | 24532 | case DW_MACRO_end_file: |
cf2c3c16 TT |
24533 | /* No data to skip by MAC_PTR. */ |
24534 | break; | |
24535 | ||
0af92d60 JK |
24536 | case DW_MACRO_define_strp: |
24537 | case DW_MACRO_undef_strp: | |
24538 | case DW_MACRO_define_sup: | |
24539 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
24540 | { |
24541 | unsigned int bytes_read; | |
24542 | ||
24543 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24544 | mac_ptr += bytes_read; | |
24545 | mac_ptr += offset_size; | |
24546 | } | |
24547 | break; | |
24548 | ||
0af92d60 JK |
24549 | case DW_MACRO_import: |
24550 | case DW_MACRO_import_sup: | |
cf2c3c16 | 24551 | /* Note that, according to the spec, a transparent include |
0af92d60 | 24552 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
24553 | skip this opcode. */ |
24554 | mac_ptr += offset_size; | |
24555 | break; | |
24556 | ||
24557 | case DW_MACINFO_vendor_ext: | |
24558 | /* Only skip the data by MAC_PTR. */ | |
24559 | if (!section_is_gnu) | |
24560 | { | |
24561 | unsigned int bytes_read; | |
24562 | ||
24563 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24564 | mac_ptr += bytes_read; | |
24565 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24566 | mac_ptr += bytes_read; | |
24567 | } | |
24568 | /* FALLTHROUGH */ | |
24569 | ||
24570 | default: | |
24571 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 24572 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
24573 | section); |
24574 | if (mac_ptr == NULL) | |
24575 | return; | |
24576 | break; | |
24577 | } | |
24578 | } while (macinfo_type != 0 && current_file == NULL); | |
24579 | ||
24580 | /* Second pass: Process all entries. | |
24581 | ||
24582 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
24583 | command-line macro definitions/undefinitions. This flag is unset when we | |
24584 | reach the first DW_MACINFO_start_file entry. */ | |
24585 | ||
fc4007c9 TT |
24586 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
24587 | htab_eq_pointer, | |
24588 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 24589 | mac_ptr = section->buffer + offset; |
fc4007c9 | 24590 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 24591 | *slot = (void *) mac_ptr; |
8fc3fc34 | 24592 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 24593 | current_file, lh, section, |
fc4007c9 TT |
24594 | section_is_gnu, 0, offset_size, |
24595 | include_hash.get ()); | |
cf2c3c16 TT |
24596 | } |
24597 | ||
8e19ed76 | 24598 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 24599 | if so return true else false. */ |
380bca97 | 24600 | |
8e19ed76 | 24601 | static int |
6e5a29e1 | 24602 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
24603 | { |
24604 | return (attr == NULL ? 0 : | |
24605 | attr->form == DW_FORM_block1 | |
24606 | || attr->form == DW_FORM_block2 | |
24607 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
24608 | || attr->form == DW_FORM_block |
24609 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 24610 | } |
4c2df51b | 24611 | |
c6a0999f JB |
24612 | /* Return non-zero if ATTR's value is a section offset --- classes |
24613 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
24614 | You may use DW_UNSND (attr) to retrieve such offsets. | |
24615 | ||
24616 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
24617 | may have a value that belongs to more than one of these classes; it | |
24618 | would be ambiguous if we did, because we use the same forms for all | |
24619 | of them. */ | |
380bca97 | 24620 | |
3690dd37 | 24621 | static int |
6e5a29e1 | 24622 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
24623 | { |
24624 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
24625 | || attr->form == DW_FORM_data8 |
24626 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
24627 | } |
24628 | ||
3690dd37 JB |
24629 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
24630 | zero otherwise. When this function returns true, you can apply | |
24631 | dwarf2_get_attr_constant_value to it. | |
24632 | ||
24633 | However, note that for some attributes you must check | |
24634 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
24635 | and DW_FORM_data8 are members of both the constant class, and of | |
24636 | the classes that contain offsets into other debug sections | |
24637 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
24638 | that, if an attribute's can be either a constant or one of the | |
24639 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
24640 | taken as section offsets, not constants. |
24641 | ||
24642 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
24643 | cannot handle that. */ | |
380bca97 | 24644 | |
3690dd37 | 24645 | static int |
6e5a29e1 | 24646 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
24647 | { |
24648 | switch (attr->form) | |
24649 | { | |
24650 | case DW_FORM_sdata: | |
24651 | case DW_FORM_udata: | |
24652 | case DW_FORM_data1: | |
24653 | case DW_FORM_data2: | |
24654 | case DW_FORM_data4: | |
24655 | case DW_FORM_data8: | |
663c44ac | 24656 | case DW_FORM_implicit_const: |
3690dd37 JB |
24657 | return 1; |
24658 | default: | |
24659 | return 0; | |
24660 | } | |
24661 | } | |
24662 | ||
7771576e SA |
24663 | |
24664 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
24665 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
24666 | ||
24667 | static int | |
6e5a29e1 | 24668 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
24669 | { |
24670 | switch (attr->form) | |
24671 | { | |
24672 | case DW_FORM_ref_addr: | |
24673 | case DW_FORM_ref1: | |
24674 | case DW_FORM_ref2: | |
24675 | case DW_FORM_ref4: | |
24676 | case DW_FORM_ref8: | |
24677 | case DW_FORM_ref_udata: | |
24678 | case DW_FORM_GNU_ref_alt: | |
24679 | return 1; | |
24680 | default: | |
24681 | return 0; | |
24682 | } | |
24683 | } | |
24684 | ||
3019eac3 DE |
24685 | /* Return the .debug_loc section to use for CU. |
24686 | For DWO files use .debug_loc.dwo. */ | |
24687 | ||
24688 | static struct dwarf2_section_info * | |
24689 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
24690 | { | |
24691 | if (cu->dwo_unit) | |
43988095 JK |
24692 | { |
24693 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
24694 | ||
24695 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
24696 | } | |
24697 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
24698 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
24699 | } |
24700 | ||
8cf6f0b1 TT |
24701 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
24702 | ||
24703 | static void | |
24704 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
24705 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 24706 | const struct attribute *attr) |
8cf6f0b1 | 24707 | { |
3019eac3 DE |
24708 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
24709 | ||
24710 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
24711 | |
24712 | baton->per_cu = cu->per_cu; | |
24713 | gdb_assert (baton->per_cu); | |
24714 | /* We don't know how long the location list is, but make sure we | |
24715 | don't run off the edge of the section. */ | |
3019eac3 DE |
24716 | baton->size = section->size - DW_UNSND (attr); |
24717 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 24718 | baton->base_address = cu->base_address; |
f664829e | 24719 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
24720 | } |
24721 | ||
4c2df51b | 24722 | static void |
ff39bb5e | 24723 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 24724 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 24725 | { |
bb5ed363 | 24726 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 24727 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 24728 | |
3690dd37 | 24729 | if (attr_form_is_section_offset (attr) |
3019eac3 | 24730 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
24731 | the section. If so, fall through to the complaint in the |
24732 | other branch. */ | |
3019eac3 | 24733 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 24734 | { |
0d53c4c4 | 24735 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 24736 | |
8d749320 | 24737 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 24738 | |
8cf6f0b1 | 24739 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 24740 | |
d00adf39 | 24741 | if (cu->base_known == 0) |
0d53c4c4 | 24742 | complaint (&symfile_complaints, |
3e43a32a MS |
24743 | _("Location list used without " |
24744 | "specifying the CU base address.")); | |
4c2df51b | 24745 | |
f1e6e072 TT |
24746 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24747 | ? dwarf2_loclist_block_index | |
24748 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
24749 | SYMBOL_LOCATION_BATON (sym) = baton; |
24750 | } | |
24751 | else | |
24752 | { | |
24753 | struct dwarf2_locexpr_baton *baton; | |
24754 | ||
8d749320 | 24755 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
24756 | baton->per_cu = cu->per_cu; |
24757 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
24758 | |
24759 | if (attr_form_is_block (attr)) | |
24760 | { | |
24761 | /* Note that we're just copying the block's data pointer | |
24762 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
24763 | info_buffer for SYM's objfile; right now we never release |
24764 | that buffer, but when we do clean up properly this may | |
24765 | need to change. */ | |
0d53c4c4 DJ |
24766 | baton->size = DW_BLOCK (attr)->size; |
24767 | baton->data = DW_BLOCK (attr)->data; | |
24768 | } | |
24769 | else | |
24770 | { | |
24771 | dwarf2_invalid_attrib_class_complaint ("location description", | |
24772 | SYMBOL_NATURAL_NAME (sym)); | |
24773 | baton->size = 0; | |
0d53c4c4 | 24774 | } |
6e70227d | 24775 | |
f1e6e072 TT |
24776 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24777 | ? dwarf2_locexpr_block_index | |
24778 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
24779 | SYMBOL_LOCATION_BATON (sym) = baton; |
24780 | } | |
4c2df51b | 24781 | } |
6502dd73 | 24782 | |
9aa1f1e3 TT |
24783 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
24784 | came from a separate debuginfo file, then the master objfile is | |
24785 | returned. */ | |
ae0d2f24 UW |
24786 | |
24787 | struct objfile * | |
24788 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
24789 | { | |
9291a0cd | 24790 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
24791 | |
24792 | /* Return the master objfile, so that we can report and look up the | |
24793 | correct file containing this variable. */ | |
24794 | if (objfile->separate_debug_objfile_backlink) | |
24795 | objfile = objfile->separate_debug_objfile_backlink; | |
24796 | ||
24797 | return objfile; | |
24798 | } | |
24799 | ||
96408a79 SA |
24800 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
24801 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
24802 | CU_HEADERP first. */ | |
24803 | ||
24804 | static const struct comp_unit_head * | |
24805 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
24806 | struct dwarf2_per_cu_data *per_cu) | |
24807 | { | |
d521ce57 | 24808 | const gdb_byte *info_ptr; |
96408a79 SA |
24809 | |
24810 | if (per_cu->cu) | |
24811 | return &per_cu->cu->header; | |
24812 | ||
9c541725 | 24813 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
24814 | |
24815 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
24816 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
24817 | rcuh_kind::COMPILE); | |
96408a79 SA |
24818 | |
24819 | return cu_headerp; | |
24820 | } | |
24821 | ||
ae0d2f24 UW |
24822 | /* Return the address size given in the compilation unit header for CU. */ |
24823 | ||
98714339 | 24824 | int |
ae0d2f24 UW |
24825 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
24826 | { | |
96408a79 SA |
24827 | struct comp_unit_head cu_header_local; |
24828 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 24829 | |
96408a79 SA |
24830 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
24831 | ||
24832 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
24833 | } |
24834 | ||
9eae7c52 TT |
24835 | /* Return the offset size given in the compilation unit header for CU. */ |
24836 | ||
24837 | int | |
24838 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
24839 | { | |
96408a79 SA |
24840 | struct comp_unit_head cu_header_local; |
24841 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 24842 | |
96408a79 SA |
24843 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
24844 | ||
24845 | return cu_headerp->offset_size; | |
24846 | } | |
24847 | ||
24848 | /* See its dwarf2loc.h declaration. */ | |
24849 | ||
24850 | int | |
24851 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
24852 | { | |
24853 | struct comp_unit_head cu_header_local; | |
24854 | const struct comp_unit_head *cu_headerp; | |
24855 | ||
24856 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
24857 | ||
24858 | if (cu_headerp->version == 2) | |
24859 | return cu_headerp->addr_size; | |
24860 | else | |
24861 | return cu_headerp->offset_size; | |
181cebd4 JK |
24862 | } |
24863 | ||
9aa1f1e3 TT |
24864 | /* Return the text offset of the CU. The returned offset comes from |
24865 | this CU's objfile. If this objfile came from a separate debuginfo | |
24866 | file, then the offset may be different from the corresponding | |
24867 | offset in the parent objfile. */ | |
24868 | ||
24869 | CORE_ADDR | |
24870 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
24871 | { | |
bb3fa9d0 | 24872 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
24873 | |
24874 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
24875 | } | |
24876 | ||
43988095 JK |
24877 | /* Return DWARF version number of PER_CU. */ |
24878 | ||
24879 | short | |
24880 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
24881 | { | |
24882 | return per_cu->dwarf_version; | |
24883 | } | |
24884 | ||
348e048f DE |
24885 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
24886 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
24887 | |
24888 | static struct dwarf2_per_cu_data * | |
9c541725 | 24889 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 24890 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
24891 | struct objfile *objfile) |
24892 | { | |
24893 | struct dwarf2_per_cu_data *this_cu; | |
24894 | int low, high; | |
36586728 | 24895 | const sect_offset *cu_off; |
ae038cb0 | 24896 | |
ae038cb0 DJ |
24897 | low = 0; |
24898 | high = dwarf2_per_objfile->n_comp_units - 1; | |
24899 | while (high > low) | |
24900 | { | |
36586728 | 24901 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 24902 | int mid = low + (high - low) / 2; |
9a619af0 | 24903 | |
36586728 | 24904 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 24905 | cu_off = &mid_cu->sect_off; |
36586728 | 24906 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 24907 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
24908 | high = mid; |
24909 | else | |
24910 | low = mid + 1; | |
24911 | } | |
24912 | gdb_assert (low == high); | |
36586728 | 24913 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
24914 | cu_off = &this_cu->sect_off; |
24915 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 24916 | { |
36586728 | 24917 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 24918 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
24919 | "offset 0x%x [in module %s]"), |
24920 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 24921 | |
9c541725 PA |
24922 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
24923 | <= sect_off); | |
ae038cb0 DJ |
24924 | return dwarf2_per_objfile->all_comp_units[low-1]; |
24925 | } | |
24926 | else | |
24927 | { | |
24928 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
24929 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
24930 | && sect_off >= this_cu->sect_off + this_cu->length) |
24931 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
24932 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
24933 | return this_cu; |
24934 | } | |
24935 | } | |
24936 | ||
23745b47 | 24937 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 24938 | |
9816fde3 | 24939 | static void |
23745b47 | 24940 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 24941 | { |
9816fde3 | 24942 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
24943 | per_cu->cu = cu; |
24944 | cu->per_cu = per_cu; | |
24945 | cu->objfile = per_cu->objfile; | |
93311388 | 24946 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
24947 | } |
24948 | ||
24949 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
24950 | ||
24951 | static void | |
95554aad TT |
24952 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
24953 | enum language pretend_language) | |
9816fde3 JK |
24954 | { |
24955 | struct attribute *attr; | |
24956 | ||
24957 | /* Set the language we're debugging. */ | |
24958 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
24959 | if (attr) | |
24960 | set_cu_language (DW_UNSND (attr), cu); | |
24961 | else | |
9cded63f | 24962 | { |
95554aad | 24963 | cu->language = pretend_language; |
9cded63f TT |
24964 | cu->language_defn = language_def (cu->language); |
24965 | } | |
dee91e82 | 24966 | |
7d45c7c3 | 24967 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
24968 | } |
24969 | ||
ae038cb0 DJ |
24970 | /* Release one cached compilation unit, CU. We unlink it from the tree |
24971 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
24972 | the caller is responsible for that. |
24973 | NOTE: DATA is a void * because this function is also used as a | |
24974 | cleanup routine. */ | |
ae038cb0 DJ |
24975 | |
24976 | static void | |
68dc6402 | 24977 | free_heap_comp_unit (void *data) |
ae038cb0 | 24978 | { |
9a3c8263 | 24979 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 24980 | |
23745b47 DE |
24981 | gdb_assert (cu->per_cu != NULL); |
24982 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
24983 | cu->per_cu = NULL; |
24984 | ||
24985 | obstack_free (&cu->comp_unit_obstack, NULL); | |
24986 | ||
24987 | xfree (cu); | |
24988 | } | |
24989 | ||
72bf9492 | 24990 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 24991 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 24992 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
24993 | |
24994 | static void | |
24995 | free_stack_comp_unit (void *data) | |
24996 | { | |
9a3c8263 | 24997 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 24998 | |
23745b47 DE |
24999 | gdb_assert (cu->per_cu != NULL); |
25000 | cu->per_cu->cu = NULL; | |
25001 | cu->per_cu = NULL; | |
25002 | ||
72bf9492 DJ |
25003 | obstack_free (&cu->comp_unit_obstack, NULL); |
25004 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
25005 | } |
25006 | ||
25007 | /* Free all cached compilation units. */ | |
25008 | ||
25009 | static void | |
25010 | free_cached_comp_units (void *data) | |
25011 | { | |
330cdd98 | 25012 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
25013 | } |
25014 | ||
25015 | /* Increase the age counter on each cached compilation unit, and free | |
25016 | any that are too old. */ | |
25017 | ||
25018 | static void | |
25019 | age_cached_comp_units (void) | |
25020 | { | |
25021 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
25022 | ||
25023 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
25024 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25025 | while (per_cu != NULL) | |
25026 | { | |
25027 | per_cu->cu->last_used ++; | |
b4f54984 | 25028 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
25029 | dwarf2_mark (per_cu->cu); |
25030 | per_cu = per_cu->cu->read_in_chain; | |
25031 | } | |
25032 | ||
25033 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25034 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25035 | while (per_cu != NULL) | |
25036 | { | |
25037 | struct dwarf2_per_cu_data *next_cu; | |
25038 | ||
25039 | next_cu = per_cu->cu->read_in_chain; | |
25040 | ||
25041 | if (!per_cu->cu->mark) | |
25042 | { | |
68dc6402 | 25043 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
25044 | *last_chain = next_cu; |
25045 | } | |
25046 | else | |
25047 | last_chain = &per_cu->cu->read_in_chain; | |
25048 | ||
25049 | per_cu = next_cu; | |
25050 | } | |
25051 | } | |
25052 | ||
25053 | /* Remove a single compilation unit from the cache. */ | |
25054 | ||
25055 | static void | |
dee91e82 | 25056 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
25057 | { |
25058 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
25059 | ||
25060 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25061 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25062 | while (per_cu != NULL) | |
25063 | { | |
25064 | struct dwarf2_per_cu_data *next_cu; | |
25065 | ||
25066 | next_cu = per_cu->cu->read_in_chain; | |
25067 | ||
dee91e82 | 25068 | if (per_cu == target_per_cu) |
ae038cb0 | 25069 | { |
68dc6402 | 25070 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 25071 | per_cu->cu = NULL; |
ae038cb0 DJ |
25072 | *last_chain = next_cu; |
25073 | break; | |
25074 | } | |
25075 | else | |
25076 | last_chain = &per_cu->cu->read_in_chain; | |
25077 | ||
25078 | per_cu = next_cu; | |
25079 | } | |
25080 | } | |
25081 | ||
fe3e1990 DJ |
25082 | /* Release all extra memory associated with OBJFILE. */ |
25083 | ||
25084 | void | |
25085 | dwarf2_free_objfile (struct objfile *objfile) | |
25086 | { | |
9a3c8263 SM |
25087 | dwarf2_per_objfile |
25088 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
25089 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
25090 | |
25091 | if (dwarf2_per_objfile == NULL) | |
25092 | return; | |
25093 | ||
330cdd98 | 25094 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
25095 | } |
25096 | ||
dee91e82 DE |
25097 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
25098 | We store these in a hash table separate from the DIEs, and preserve them | |
25099 | when the DIEs are flushed out of cache. | |
25100 | ||
25101 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 25102 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
25103 | or the type may come from a DWO file. Furthermore, while it's more logical |
25104 | to use per_cu->section+offset, with Fission the section with the data is in | |
25105 | the DWO file but we don't know that section at the point we need it. | |
25106 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
25107 | because we can enter the lookup routine, get_die_type_at_offset, from | |
25108 | outside this file, and thus won't necessarily have PER_CU->cu. | |
25109 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 25110 | |
dee91e82 | 25111 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 25112 | { |
dee91e82 | 25113 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 25114 | sect_offset sect_off; |
1c379e20 DJ |
25115 | struct type *type; |
25116 | }; | |
25117 | ||
dee91e82 | 25118 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25119 | |
25120 | static hashval_t | |
dee91e82 | 25121 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 25122 | { |
9a3c8263 SM |
25123 | const struct dwarf2_per_cu_offset_and_type *ofs |
25124 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 25125 | |
9c541725 | 25126 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
25127 | } |
25128 | ||
dee91e82 | 25129 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25130 | |
25131 | static int | |
dee91e82 | 25132 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 25133 | { |
9a3c8263 SM |
25134 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
25135 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
25136 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
25137 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 25138 | |
dee91e82 | 25139 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 25140 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
25141 | } |
25142 | ||
25143 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
25144 | table if necessary. For convenience, return TYPE. |
25145 | ||
25146 | The DIEs reading must have careful ordering to: | |
25147 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
25148 | reading current DIE. | |
25149 | * Not trying to dereference contents of still incompletely read in types | |
25150 | while reading in other DIEs. | |
25151 | * Enable referencing still incompletely read in types just by a pointer to | |
25152 | the type without accessing its fields. | |
25153 | ||
25154 | Therefore caller should follow these rules: | |
25155 | * Try to fetch any prerequisite types we may need to build this DIE type | |
25156 | before building the type and calling set_die_type. | |
e71ec853 | 25157 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
25158 | possible before fetching more types to complete the current type. |
25159 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 25160 | |
f792889a | 25161 | static struct type * |
1c379e20 DJ |
25162 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
25163 | { | |
dee91e82 | 25164 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 25165 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
25166 | struct attribute *attr; |
25167 | struct dynamic_prop prop; | |
1c379e20 | 25168 | |
b4ba55a1 JB |
25169 | /* For Ada types, make sure that the gnat-specific data is always |
25170 | initialized (if not already set). There are a few types where | |
25171 | we should not be doing so, because the type-specific area is | |
25172 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
25173 | where the type-specific area is used to store the floatformat). | |
25174 | But this is not a problem, because the gnat-specific information | |
25175 | is actually not needed for these types. */ | |
25176 | if (need_gnat_info (cu) | |
25177 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
25178 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
25179 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
25180 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
25181 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
25182 | && !HAVE_GNAT_AUX_INFO (type)) |
25183 | INIT_GNAT_SPECIFIC (type); | |
25184 | ||
3f2f83dd KB |
25185 | /* Read DW_AT_allocated and set in type. */ |
25186 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
25187 | if (attr_form_is_block (attr)) | |
25188 | { | |
25189 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
25190 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
25191 | } | |
25192 | else if (attr != NULL) | |
25193 | { | |
25194 | complaint (&symfile_complaints, | |
9c541725 PA |
25195 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
25196 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
25197 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
25198 | } |
25199 | ||
25200 | /* Read DW_AT_associated and set in type. */ | |
25201 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
25202 | if (attr_form_is_block (attr)) | |
25203 | { | |
25204 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
25205 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
25206 | } | |
25207 | else if (attr != NULL) | |
25208 | { | |
25209 | complaint (&symfile_complaints, | |
9c541725 PA |
25210 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
25211 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
25212 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
25213 | } |
25214 | ||
3cdcd0ce JB |
25215 | /* Read DW_AT_data_location and set in type. */ |
25216 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
25217 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 25218 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 25219 | |
dee91e82 | 25220 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25221 | { |
dee91e82 DE |
25222 | dwarf2_per_objfile->die_type_hash = |
25223 | htab_create_alloc_ex (127, | |
25224 | per_cu_offset_and_type_hash, | |
25225 | per_cu_offset_and_type_eq, | |
25226 | NULL, | |
25227 | &objfile->objfile_obstack, | |
25228 | hashtab_obstack_allocate, | |
25229 | dummy_obstack_deallocate); | |
f792889a | 25230 | } |
1c379e20 | 25231 | |
dee91e82 | 25232 | ofs.per_cu = cu->per_cu; |
9c541725 | 25233 | ofs.sect_off = die->sect_off; |
1c379e20 | 25234 | ofs.type = type; |
dee91e82 DE |
25235 | slot = (struct dwarf2_per_cu_offset_and_type **) |
25236 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
25237 | if (*slot) |
25238 | complaint (&symfile_complaints, | |
25239 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 25240 | to_underlying (die->sect_off)); |
8d749320 SM |
25241 | *slot = XOBNEW (&objfile->objfile_obstack, |
25242 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 25243 | **slot = ofs; |
f792889a | 25244 | return type; |
1c379e20 DJ |
25245 | } |
25246 | ||
9c541725 | 25247 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 25248 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
25249 | |
25250 | static struct type * | |
9c541725 | 25251 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 25252 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 25253 | { |
dee91e82 | 25254 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 25255 | |
dee91e82 | 25256 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25257 | return NULL; |
1c379e20 | 25258 | |
dee91e82 | 25259 | ofs.per_cu = per_cu; |
9c541725 | 25260 | ofs.sect_off = sect_off; |
9a3c8263 SM |
25261 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
25262 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
25263 | if (slot) |
25264 | return slot->type; | |
25265 | else | |
25266 | return NULL; | |
25267 | } | |
25268 | ||
02142a6c | 25269 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
25270 | or return NULL if DIE does not have a saved type. */ |
25271 | ||
25272 | static struct type * | |
25273 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
25274 | { | |
9c541725 | 25275 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
25276 | } |
25277 | ||
10b3939b DJ |
25278 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
25279 | ||
25280 | static void | |
25281 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
25282 | struct dwarf2_per_cu_data *ref_per_cu) | |
25283 | { | |
25284 | void **slot; | |
25285 | ||
25286 | if (cu->dependencies == NULL) | |
25287 | cu->dependencies | |
25288 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
25289 | NULL, &cu->comp_unit_obstack, | |
25290 | hashtab_obstack_allocate, | |
25291 | dummy_obstack_deallocate); | |
25292 | ||
25293 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
25294 | if (*slot == NULL) | |
25295 | *slot = ref_per_cu; | |
25296 | } | |
1c379e20 | 25297 | |
f504f079 DE |
25298 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
25299 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
25300 | cache that we must keep because we are keeping CU. */ |
25301 | ||
10b3939b DJ |
25302 | static int |
25303 | dwarf2_mark_helper (void **slot, void *data) | |
25304 | { | |
25305 | struct dwarf2_per_cu_data *per_cu; | |
25306 | ||
25307 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
25308 | |
25309 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
25310 | reading of the chain. As such dependencies remain valid it is not much | |
25311 | useful to track and undo them during QUIT cleanups. */ | |
25312 | if (per_cu->cu == NULL) | |
25313 | return 1; | |
25314 | ||
10b3939b DJ |
25315 | if (per_cu->cu->mark) |
25316 | return 1; | |
25317 | per_cu->cu->mark = 1; | |
25318 | ||
25319 | if (per_cu->cu->dependencies != NULL) | |
25320 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
25321 | ||
25322 | return 1; | |
25323 | } | |
25324 | ||
f504f079 DE |
25325 | /* Set the mark field in CU and in every other compilation unit in the |
25326 | cache that we must keep because we are keeping CU. */ | |
25327 | ||
ae038cb0 DJ |
25328 | static void |
25329 | dwarf2_mark (struct dwarf2_cu *cu) | |
25330 | { | |
25331 | if (cu->mark) | |
25332 | return; | |
25333 | cu->mark = 1; | |
10b3939b DJ |
25334 | if (cu->dependencies != NULL) |
25335 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
25336 | } |
25337 | ||
25338 | static void | |
25339 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
25340 | { | |
25341 | while (per_cu) | |
25342 | { | |
25343 | per_cu->cu->mark = 0; | |
25344 | per_cu = per_cu->cu->read_in_chain; | |
25345 | } | |
72bf9492 DJ |
25346 | } |
25347 | ||
72bf9492 DJ |
25348 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
25349 | is its offset in .debug_info for this objfile. */ | |
25350 | ||
25351 | static hashval_t | |
25352 | partial_die_hash (const void *item) | |
25353 | { | |
9a3c8263 SM |
25354 | const struct partial_die_info *part_die |
25355 | = (const struct partial_die_info *) item; | |
9a619af0 | 25356 | |
9c541725 | 25357 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
25358 | } |
25359 | ||
25360 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
25361 | are equal if they have the same offset. */ | |
25362 | ||
25363 | static int | |
25364 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
25365 | { | |
9a3c8263 SM |
25366 | const struct partial_die_info *part_die_lhs |
25367 | = (const struct partial_die_info *) item_lhs; | |
25368 | const struct partial_die_info *part_die_rhs | |
25369 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 25370 | |
9c541725 | 25371 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
25372 | } |
25373 | ||
b4f54984 DE |
25374 | static struct cmd_list_element *set_dwarf_cmdlist; |
25375 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
25376 | |
25377 | static void | |
981a3fb3 | 25378 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 25379 | { |
b4f54984 | 25380 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 25381 | gdb_stdout); |
ae038cb0 DJ |
25382 | } |
25383 | ||
25384 | static void | |
981a3fb3 | 25385 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 25386 | { |
b4f54984 | 25387 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
25388 | } |
25389 | ||
4bf44c1c | 25390 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
25391 | |
25392 | static void | |
c1bd65d0 | 25393 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 25394 | { |
9a3c8263 | 25395 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 25396 | int ix; |
8b70b953 | 25397 | |
626f2d1c TT |
25398 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
25399 | cleaning up. */ | |
25400 | dwarf2_per_objfile = NULL; | |
25401 | ||
59b0c7c1 JB |
25402 | for (ix = 0; ix < data->n_comp_units; ++ix) |
25403 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 25404 | |
59b0c7c1 | 25405 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 25406 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
25407 | data->all_type_units[ix]->per_cu.imported_symtabs); |
25408 | xfree (data->all_type_units); | |
95554aad | 25409 | |
8b70b953 | 25410 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
25411 | |
25412 | if (data->dwo_files) | |
25413 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
25414 | if (data->dwp_file) |
25415 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
25416 | |
25417 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
25418 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
3f563c84 PA |
25419 | |
25420 | if (data->index_table != NULL) | |
25421 | data->index_table->~mapped_index (); | |
9291a0cd TT |
25422 | } |
25423 | ||
25424 | \f | |
ae2de4f8 | 25425 | /* The "save gdb-index" command. */ |
9291a0cd | 25426 | |
437afbb8 JK |
25427 | /* Write SIZE bytes from the buffer pointed to by DATA to FILE, with |
25428 | error checking. */ | |
25429 | ||
25430 | static void | |
25431 | file_write (FILE *file, const void *data, size_t size) | |
25432 | { | |
25433 | if (fwrite (data, 1, size, file) != size) | |
25434 | error (_("couldn't data write to file")); | |
25435 | } | |
25436 | ||
25437 | /* Write the contents of VEC to FILE, with error checking. */ | |
25438 | ||
25439 | template<typename Elem, typename Alloc> | |
25440 | static void | |
25441 | file_write (FILE *file, const std::vector<Elem, Alloc> &vec) | |
25442 | { | |
25443 | file_write (file, vec.data (), vec.size () * sizeof (vec[0])); | |
25444 | } | |
25445 | ||
bc8f2430 JK |
25446 | /* In-memory buffer to prepare data to be written later to a file. */ |
25447 | class data_buf | |
9291a0cd | 25448 | { |
bc8f2430 | 25449 | public: |
bc8f2430 JK |
25450 | /* Copy DATA to the end of the buffer. */ |
25451 | template<typename T> | |
25452 | void append_data (const T &data) | |
25453 | { | |
25454 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
25455 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 25456 | grow (sizeof (data))); |
bc8f2430 | 25457 | } |
b89be57b | 25458 | |
c2f134ac PA |
25459 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
25460 | terminating zero is appended too. */ | |
bc8f2430 JK |
25461 | void append_cstr0 (const char *cstr) |
25462 | { | |
25463 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
25464 | std::copy (cstr, cstr + size, grow (size)); |
25465 | } | |
25466 | ||
437afbb8 JK |
25467 | /* Store INPUT as ULEB128 to the end of buffer. */ |
25468 | void append_unsigned_leb128 (ULONGEST input) | |
25469 | { | |
25470 | for (;;) | |
25471 | { | |
25472 | gdb_byte output = input & 0x7f; | |
25473 | input >>= 7; | |
25474 | if (input) | |
25475 | output |= 0x80; | |
25476 | append_data (output); | |
25477 | if (input == 0) | |
25478 | break; | |
25479 | } | |
25480 | } | |
25481 | ||
c2f134ac PA |
25482 | /* Accept a host-format integer in VAL and append it to the buffer |
25483 | as a target-format integer which is LEN bytes long. */ | |
25484 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
25485 | { | |
25486 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 25487 | } |
9291a0cd | 25488 | |
bc8f2430 JK |
25489 | /* Return the size of the buffer. */ |
25490 | size_t size () const | |
25491 | { | |
25492 | return m_vec.size (); | |
25493 | } | |
25494 | ||
437afbb8 JK |
25495 | /* Return true iff the buffer is empty. */ |
25496 | bool empty () const | |
25497 | { | |
25498 | return m_vec.empty (); | |
25499 | } | |
25500 | ||
bc8f2430 JK |
25501 | /* Write the buffer to FILE. */ |
25502 | void file_write (FILE *file) const | |
25503 | { | |
437afbb8 | 25504 | ::file_write (file, m_vec); |
bc8f2430 JK |
25505 | } |
25506 | ||
25507 | private: | |
c2f134ac PA |
25508 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
25509 | the start of the new block. */ | |
25510 | gdb_byte *grow (size_t size) | |
25511 | { | |
25512 | m_vec.resize (m_vec.size () + size); | |
25513 | return &*m_vec.end () - size; | |
25514 | } | |
25515 | ||
d5722aa2 | 25516 | gdb::byte_vector m_vec; |
bc8f2430 | 25517 | }; |
9291a0cd TT |
25518 | |
25519 | /* An entry in the symbol table. */ | |
25520 | struct symtab_index_entry | |
25521 | { | |
25522 | /* The name of the symbol. */ | |
25523 | const char *name; | |
25524 | /* The offset of the name in the constant pool. */ | |
25525 | offset_type index_offset; | |
25526 | /* A sorted vector of the indices of all the CUs that hold an object | |
25527 | of this name. */ | |
bc8f2430 | 25528 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
25529 | }; |
25530 | ||
25531 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
25532 | struct mapped_symtab | |
25533 | { | |
bc8f2430 JK |
25534 | mapped_symtab () |
25535 | { | |
25536 | data.resize (1024); | |
25537 | } | |
b89be57b | 25538 | |
bc8f2430 | 25539 | offset_type n_elements = 0; |
4b76cda9 | 25540 | std::vector<symtab_index_entry> data; |
bc8f2430 | 25541 | }; |
9291a0cd | 25542 | |
bc8f2430 | 25543 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
25544 | the slot. |
25545 | ||
25546 | Function is used only during write_hash_table so no index format backward | |
25547 | compatibility is needed. */ | |
b89be57b | 25548 | |
4b76cda9 | 25549 | static symtab_index_entry & |
9291a0cd TT |
25550 | find_slot (struct mapped_symtab *symtab, const char *name) |
25551 | { | |
559a7a62 | 25552 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 25553 | |
bc8f2430 JK |
25554 | index = hash & (symtab->data.size () - 1); |
25555 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
25556 | |
25557 | for (;;) | |
25558 | { | |
4b76cda9 PA |
25559 | if (symtab->data[index].name == NULL |
25560 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
25561 | return symtab->data[index]; |
25562 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
25563 | } |
25564 | } | |
25565 | ||
25566 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 25567 | |
9291a0cd TT |
25568 | static void |
25569 | hash_expand (struct mapped_symtab *symtab) | |
25570 | { | |
bc8f2430 | 25571 | auto old_entries = std::move (symtab->data); |
9291a0cd | 25572 | |
bc8f2430 JK |
25573 | symtab->data.clear (); |
25574 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 25575 | |
bc8f2430 | 25576 | for (auto &it : old_entries) |
4b76cda9 | 25577 | if (it.name != NULL) |
bc8f2430 | 25578 | { |
4b76cda9 | 25579 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
25580 | ref = std::move (it); |
25581 | } | |
9291a0cd TT |
25582 | } |
25583 | ||
156942c7 DE |
25584 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
25585 | CU_INDEX is the index of the CU in which the symbol appears. | |
25586 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 25587 | |
9291a0cd TT |
25588 | static void |
25589 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 25590 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
25591 | offset_type cu_index) |
25592 | { | |
156942c7 | 25593 | offset_type cu_index_and_attrs; |
9291a0cd TT |
25594 | |
25595 | ++symtab->n_elements; | |
bc8f2430 | 25596 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
25597 | hash_expand (symtab); |
25598 | ||
4b76cda9 PA |
25599 | symtab_index_entry &slot = find_slot (symtab, name); |
25600 | if (slot.name == NULL) | |
9291a0cd | 25601 | { |
4b76cda9 | 25602 | slot.name = name; |
156942c7 | 25603 | /* index_offset is set later. */ |
9291a0cd | 25604 | } |
156942c7 DE |
25605 | |
25606 | cu_index_and_attrs = 0; | |
25607 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
25608 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
25609 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
25610 | ||
25611 | /* We don't want to record an index value twice as we want to avoid the | |
25612 | duplication. | |
25613 | We process all global symbols and then all static symbols | |
25614 | (which would allow us to avoid the duplication by only having to check | |
25615 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
25616 | To keep things simple we don't worry about the duplication here and | |
25617 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 25618 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
25619 | } |
25620 | ||
25621 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
25622 | ||
25623 | static void | |
25624 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
25625 | { | |
4b76cda9 | 25626 | for (auto &entry : symtab->data) |
156942c7 | 25627 | { |
4b76cda9 | 25628 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 25629 | { |
4b76cda9 | 25630 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
25631 | std::sort (cu_indices.begin (), cu_indices.end ()); |
25632 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
25633 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
25634 | } |
25635 | } | |
9291a0cd TT |
25636 | } |
25637 | ||
bc8f2430 JK |
25638 | /* A form of 'const char *' suitable for container keys. Only the |
25639 | pointer is stored. The strings themselves are compared, not the | |
25640 | pointers. */ | |
25641 | class c_str_view | |
9291a0cd | 25642 | { |
bc8f2430 JK |
25643 | public: |
25644 | c_str_view (const char *cstr) | |
25645 | : m_cstr (cstr) | |
25646 | {} | |
9291a0cd | 25647 | |
bc8f2430 JK |
25648 | bool operator== (const c_str_view &other) const |
25649 | { | |
25650 | return strcmp (m_cstr, other.m_cstr) == 0; | |
25651 | } | |
9291a0cd | 25652 | |
437afbb8 JK |
25653 | /* Return the underlying C string. Note, the returned string is |
25654 | only a reference with lifetime of this object. */ | |
25655 | const char *c_str () const | |
25656 | { | |
25657 | return m_cstr; | |
25658 | } | |
25659 | ||
bc8f2430 JK |
25660 | private: |
25661 | friend class c_str_view_hasher; | |
25662 | const char *const m_cstr; | |
25663 | }; | |
9291a0cd | 25664 | |
bc8f2430 JK |
25665 | /* A std::unordered_map::hasher for c_str_view that uses the right |
25666 | hash function for strings in a mapped index. */ | |
25667 | class c_str_view_hasher | |
25668 | { | |
25669 | public: | |
25670 | size_t operator () (const c_str_view &x) const | |
25671 | { | |
25672 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
25673 | } | |
25674 | }; | |
b89be57b | 25675 | |
bc8f2430 JK |
25676 | /* A std::unordered_map::hasher for std::vector<>. */ |
25677 | template<typename T> | |
25678 | class vector_hasher | |
9291a0cd | 25679 | { |
bc8f2430 JK |
25680 | public: |
25681 | size_t operator () (const std::vector<T> &key) const | |
25682 | { | |
25683 | return iterative_hash (key.data (), | |
25684 | sizeof (key.front ()) * key.size (), 0); | |
25685 | } | |
25686 | }; | |
9291a0cd | 25687 | |
bc8f2430 JK |
25688 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
25689 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 25690 | |
bc8f2430 JK |
25691 | static void |
25692 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
25693 | { | |
25694 | { | |
25695 | /* Elements are sorted vectors of the indices of all the CUs that | |
25696 | hold an object of this name. */ | |
25697 | std::unordered_map<std::vector<offset_type>, offset_type, | |
25698 | vector_hasher<offset_type>> | |
25699 | symbol_hash_table; | |
25700 | ||
25701 | /* We add all the index vectors to the constant pool first, to | |
25702 | ensure alignment is ok. */ | |
4b76cda9 | 25703 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 25704 | { |
4b76cda9 | 25705 | if (entry.name == NULL) |
bc8f2430 | 25706 | continue; |
4b76cda9 | 25707 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
25708 | |
25709 | /* Finding before inserting is faster than always trying to | |
25710 | insert, because inserting always allocates a node, does the | |
25711 | lookup, and then destroys the new node if another node | |
25712 | already had the same key. C++17 try_emplace will avoid | |
25713 | this. */ | |
25714 | const auto found | |
4b76cda9 | 25715 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
25716 | if (found != symbol_hash_table.end ()) |
25717 | { | |
4b76cda9 | 25718 | entry.index_offset = found->second; |
70a1152b PA |
25719 | continue; |
25720 | } | |
25721 | ||
4b76cda9 PA |
25722 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
25723 | entry.index_offset = cpool.size (); | |
25724 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
25725 | for (const auto index : entry.cu_indices) | |
25726 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
25727 | } |
25728 | } | |
9291a0cd TT |
25729 | |
25730 | /* Now write out the hash table. */ | |
bc8f2430 | 25731 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 25732 | for (const auto &entry : symtab->data) |
9291a0cd TT |
25733 | { |
25734 | offset_type str_off, vec_off; | |
25735 | ||
4b76cda9 | 25736 | if (entry.name != NULL) |
9291a0cd | 25737 | { |
4b76cda9 | 25738 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 25739 | if (insertpair.second) |
4b76cda9 | 25740 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 25741 | str_off = insertpair.first->second; |
4b76cda9 | 25742 | vec_off = entry.index_offset; |
9291a0cd TT |
25743 | } |
25744 | else | |
25745 | { | |
25746 | /* While 0 is a valid constant pool index, it is not valid | |
25747 | to have 0 for both offsets. */ | |
25748 | str_off = 0; | |
25749 | vec_off = 0; | |
25750 | } | |
25751 | ||
bc8f2430 JK |
25752 | output.append_data (MAYBE_SWAP (str_off)); |
25753 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 25754 | } |
9291a0cd TT |
25755 | } |
25756 | ||
bc8f2430 | 25757 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
25758 | |
25759 | /* Helper struct for building the address table. */ | |
25760 | struct addrmap_index_data | |
25761 | { | |
bc8f2430 JK |
25762 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
25763 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
25764 | {} | |
25765 | ||
0a5429f6 | 25766 | struct objfile *objfile; |
bc8f2430 JK |
25767 | data_buf &addr_vec; |
25768 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
25769 | |
25770 | /* Non-zero if the previous_* fields are valid. | |
25771 | We can't write an entry until we see the next entry (since it is only then | |
25772 | that we know the end of the entry). */ | |
25773 | int previous_valid; | |
25774 | /* Index of the CU in the table of all CUs in the index file. */ | |
25775 | unsigned int previous_cu_index; | |
0963b4bd | 25776 | /* Start address of the CU. */ |
0a5429f6 DE |
25777 | CORE_ADDR previous_cu_start; |
25778 | }; | |
25779 | ||
bc8f2430 | 25780 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 25781 | |
9291a0cd | 25782 | static void |
bc8f2430 | 25783 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 25784 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 25785 | { |
9291a0cd TT |
25786 | CORE_ADDR baseaddr; |
25787 | ||
25788 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
25789 | ||
c2f134ac PA |
25790 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
25791 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 25792 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
25793 | } |
25794 | ||
25795 | /* Worker function for traversing an addrmap to build the address table. */ | |
25796 | ||
25797 | static int | |
25798 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
25799 | { | |
9a3c8263 SM |
25800 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
25801 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
25802 | |
25803 | if (data->previous_valid) | |
bc8f2430 | 25804 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
25805 | data->previous_cu_start, start_addr, |
25806 | data->previous_cu_index); | |
25807 | ||
25808 | data->previous_cu_start = start_addr; | |
25809 | if (pst != NULL) | |
25810 | { | |
bc8f2430 JK |
25811 | const auto it = data->cu_index_htab.find (pst); |
25812 | gdb_assert (it != data->cu_index_htab.cend ()); | |
25813 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
25814 | data->previous_valid = 1; |
25815 | } | |
25816 | else | |
bc8f2430 | 25817 | data->previous_valid = 0; |
0a5429f6 DE |
25818 | |
25819 | return 0; | |
25820 | } | |
25821 | ||
bc8f2430 | 25822 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
25823 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
25824 | in the index file. */ | |
25825 | ||
25826 | static void | |
bc8f2430 JK |
25827 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
25828 | psym_index_map &cu_index_htab) | |
0a5429f6 | 25829 | { |
bc8f2430 | 25830 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
25831 | |
25832 | /* When writing the address table, we have to cope with the fact that | |
25833 | the addrmap iterator only provides the start of a region; we have to | |
25834 | wait until the next invocation to get the start of the next region. */ | |
25835 | ||
25836 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
25837 | addrmap_index_data.previous_valid = 0; |
25838 | ||
25839 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
25840 | &addrmap_index_data); | |
25841 | ||
25842 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
25843 | is valid, but we should still handle it. | |
25844 | The end address is recorded as the start of the next region, but that | |
25845 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
25846 | anyway. */ | |
25847 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 25848 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
25849 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
25850 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
25851 | } |
25852 | ||
156942c7 DE |
25853 | /* Return the symbol kind of PSYM. */ |
25854 | ||
25855 | static gdb_index_symbol_kind | |
25856 | symbol_kind (struct partial_symbol *psym) | |
25857 | { | |
25858 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
25859 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
25860 | ||
25861 | switch (domain) | |
25862 | { | |
25863 | case VAR_DOMAIN: | |
25864 | switch (aclass) | |
25865 | { | |
25866 | case LOC_BLOCK: | |
25867 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
25868 | case LOC_TYPEDEF: | |
25869 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
25870 | case LOC_COMPUTED: | |
25871 | case LOC_CONST_BYTES: | |
25872 | case LOC_OPTIMIZED_OUT: | |
25873 | case LOC_STATIC: | |
25874 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
25875 | case LOC_CONST: | |
25876 | /* Note: It's currently impossible to recognize psyms as enum values | |
25877 | short of reading the type info. For now punt. */ | |
25878 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
25879 | default: | |
25880 | /* There are other LOC_FOO values that one might want to classify | |
25881 | as variables, but dwarf2read.c doesn't currently use them. */ | |
25882 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
25883 | } | |
25884 | case STRUCT_DOMAIN: | |
25885 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
25886 | default: | |
25887 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
25888 | } | |
25889 | } | |
25890 | ||
9291a0cd | 25891 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 25892 | |
9291a0cd TT |
25893 | static void |
25894 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 25895 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
25896 | struct partial_symbol **psymp, |
25897 | int count, | |
987d643c TT |
25898 | offset_type cu_index, |
25899 | int is_static) | |
9291a0cd TT |
25900 | { |
25901 | for (; count-- > 0; ++psymp) | |
25902 | { | |
156942c7 | 25903 | struct partial_symbol *psym = *psymp; |
987d643c | 25904 | |
156942c7 | 25905 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 25906 | error (_("Ada is not currently supported by the index")); |
987d643c | 25907 | |
987d643c | 25908 | /* Only add a given psymbol once. */ |
bc8f2430 | 25909 | if (psyms_seen.insert (psym).second) |
987d643c | 25910 | { |
156942c7 DE |
25911 | gdb_index_symbol_kind kind = symbol_kind (psym); |
25912 | ||
156942c7 DE |
25913 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
25914 | is_static, kind, cu_index); | |
987d643c | 25915 | } |
9291a0cd TT |
25916 | } |
25917 | } | |
25918 | ||
1fd400ff TT |
25919 | /* A helper struct used when iterating over debug_types. */ |
25920 | struct signatured_type_index_data | |
25921 | { | |
bc8f2430 JK |
25922 | signatured_type_index_data (data_buf &types_list_, |
25923 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
25924 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
25925 | {} | |
25926 | ||
1fd400ff TT |
25927 | struct objfile *objfile; |
25928 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
25929 | data_buf &types_list; |
25930 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
25931 | int cu_index; |
25932 | }; | |
25933 | ||
25934 | /* A helper function that writes a single signatured_type to an | |
25935 | obstack. */ | |
b89be57b | 25936 | |
1fd400ff TT |
25937 | static int |
25938 | write_one_signatured_type (void **slot, void *d) | |
25939 | { | |
9a3c8263 SM |
25940 | struct signatured_type_index_data *info |
25941 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 25942 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 25943 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
25944 | |
25945 | write_psymbols (info->symtab, | |
987d643c | 25946 | info->psyms_seen, |
af5bf4ad | 25947 | &info->objfile->global_psymbols[psymtab->globals_offset], |
987d643c TT |
25948 | psymtab->n_global_syms, info->cu_index, |
25949 | 0); | |
1fd400ff | 25950 | write_psymbols (info->symtab, |
987d643c | 25951 | info->psyms_seen, |
af5bf4ad | 25952 | &info->objfile->static_psymbols[psymtab->statics_offset], |
987d643c TT |
25953 | psymtab->n_static_syms, info->cu_index, |
25954 | 1); | |
1fd400ff | 25955 | |
c2f134ac PA |
25956 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
25957 | to_underlying (entry->per_cu.sect_off)); | |
25958 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
25959 | to_underlying (entry->type_offset_in_tu)); | |
25960 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
25961 | |
25962 | ++info->cu_index; | |
25963 | ||
25964 | return 1; | |
25965 | } | |
25966 | ||
e8f8bcb3 PA |
25967 | /* Recurse into all "included" dependencies and count their symbols as |
25968 | if they appeared in this psymtab. */ | |
25969 | ||
25970 | static void | |
25971 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
25972 | size_t &psyms_seen) | |
25973 | { | |
25974 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
25975 | if (psymtab->dependencies[i]->user != NULL) | |
25976 | recursively_count_psymbols (psymtab->dependencies[i], | |
25977 | psyms_seen); | |
25978 | ||
25979 | psyms_seen += psymtab->n_global_syms; | |
25980 | psyms_seen += psymtab->n_static_syms; | |
25981 | } | |
25982 | ||
95554aad TT |
25983 | /* Recurse into all "included" dependencies and write their symbols as |
25984 | if they appeared in this psymtab. */ | |
25985 | ||
25986 | static void | |
25987 | recursively_write_psymbols (struct objfile *objfile, | |
25988 | struct partial_symtab *psymtab, | |
25989 | struct mapped_symtab *symtab, | |
bc8f2430 | 25990 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
25991 | offset_type cu_index) |
25992 | { | |
25993 | int i; | |
25994 | ||
25995 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
25996 | if (psymtab->dependencies[i]->user != NULL) | |
25997 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
25998 | symtab, psyms_seen, cu_index); | |
25999 | ||
26000 | write_psymbols (symtab, | |
26001 | psyms_seen, | |
af5bf4ad | 26002 | &objfile->global_psymbols[psymtab->globals_offset], |
95554aad TT |
26003 | psymtab->n_global_syms, cu_index, |
26004 | 0); | |
26005 | write_psymbols (symtab, | |
26006 | psyms_seen, | |
af5bf4ad | 26007 | &objfile->static_psymbols[psymtab->statics_offset], |
95554aad TT |
26008 | psymtab->n_static_syms, cu_index, |
26009 | 1); | |
26010 | } | |
26011 | ||
437afbb8 JK |
26012 | /* DWARF-5 .debug_names builder. */ |
26013 | class debug_names | |
26014 | { | |
26015 | public: | |
26016 | debug_names (bool is_dwarf64, bfd_endian dwarf5_byte_order) | |
26017 | : m_dwarf5_byte_order (dwarf5_byte_order), | |
26018 | m_dwarf32 (dwarf5_byte_order), | |
26019 | m_dwarf64 (dwarf5_byte_order), | |
26020 | m_dwarf (is_dwarf64 | |
26021 | ? static_cast<dwarf &> (m_dwarf64) | |
26022 | : static_cast<dwarf &> (m_dwarf32)), | |
26023 | m_name_table_string_offs (m_dwarf.name_table_string_offs), | |
26024 | m_name_table_entry_offs (m_dwarf.name_table_entry_offs) | |
26025 | {} | |
9291a0cd | 26026 | |
8af5c486 JK |
26027 | int dwarf5_offset_size () const |
26028 | { | |
26029 | const bool dwarf5_is_dwarf64 = &m_dwarf == &m_dwarf64; | |
26030 | return dwarf5_is_dwarf64 ? 8 : 4; | |
26031 | } | |
26032 | ||
26033 | /* Is this symbol from DW_TAG_compile_unit or DW_TAG_type_unit? */ | |
26034 | enum class unit_kind { cu, tu }; | |
26035 | ||
437afbb8 | 26036 | /* Insert one symbol. */ |
8af5c486 JK |
26037 | void insert (const partial_symbol *psym, int cu_index, bool is_static, |
26038 | unit_kind kind) | |
437afbb8 JK |
26039 | { |
26040 | const int dwarf_tag = psymbol_tag (psym); | |
26041 | if (dwarf_tag == 0) | |
26042 | return; | |
26043 | const char *const name = SYMBOL_SEARCH_NAME (psym); | |
26044 | const auto insertpair | |
26045 | = m_name_to_value_set.emplace (c_str_view (name), | |
26046 | std::set<symbol_value> ()); | |
26047 | std::set<symbol_value> &value_set = insertpair.first->second; | |
8af5c486 | 26048 | value_set.emplace (symbol_value (dwarf_tag, cu_index, is_static, kind)); |
437afbb8 | 26049 | } |
9291a0cd | 26050 | |
437afbb8 JK |
26051 | /* Build all the tables. All symbols must be already inserted. |
26052 | This function does not call file_write, caller has to do it | |
26053 | afterwards. */ | |
26054 | void build () | |
26055 | { | |
26056 | /* Verify the build method has not be called twice. */ | |
26057 | gdb_assert (m_abbrev_table.empty ()); | |
26058 | const size_t name_count = m_name_to_value_set.size (); | |
26059 | m_bucket_table.resize | |
26060 | (std::pow (2, std::ceil (std::log2 (name_count * 4 / 3)))); | |
26061 | m_hash_table.reserve (name_count); | |
26062 | m_name_table_string_offs.reserve (name_count); | |
26063 | m_name_table_entry_offs.reserve (name_count); | |
26064 | ||
26065 | /* Map each hash of symbol to its name and value. */ | |
26066 | struct hash_it_pair | |
26067 | { | |
26068 | uint32_t hash; | |
26069 | decltype (m_name_to_value_set)::const_iterator it; | |
26070 | }; | |
26071 | std::vector<std::forward_list<hash_it_pair>> bucket_hash; | |
26072 | bucket_hash.resize (m_bucket_table.size ()); | |
26073 | for (decltype (m_name_to_value_set)::const_iterator it | |
26074 | = m_name_to_value_set.cbegin (); | |
26075 | it != m_name_to_value_set.cend (); | |
26076 | ++it) | |
26077 | { | |
26078 | const char *const name = it->first.c_str (); | |
26079 | const uint32_t hash = dwarf5_djb_hash (name); | |
26080 | hash_it_pair hashitpair; | |
26081 | hashitpair.hash = hash; | |
26082 | hashitpair.it = it; | |
26083 | auto &slot = bucket_hash[hash % bucket_hash.size()]; | |
26084 | slot.push_front (std::move (hashitpair)); | |
26085 | } | |
26086 | for (size_t bucket_ix = 0; bucket_ix < bucket_hash.size (); ++bucket_ix) | |
26087 | { | |
26088 | const std::forward_list<hash_it_pair> &hashitlist | |
26089 | = bucket_hash[bucket_ix]; | |
26090 | if (hashitlist.empty ()) | |
26091 | continue; | |
26092 | uint32_t &bucket_slot = m_bucket_table[bucket_ix]; | |
26093 | /* The hashes array is indexed starting at 1. */ | |
26094 | store_unsigned_integer (reinterpret_cast<gdb_byte *> (&bucket_slot), | |
26095 | sizeof (bucket_slot), m_dwarf5_byte_order, | |
26096 | m_hash_table.size () + 1); | |
26097 | for (const hash_it_pair &hashitpair : hashitlist) | |
26098 | { | |
26099 | m_hash_table.push_back (0); | |
26100 | store_unsigned_integer (reinterpret_cast<gdb_byte *> | |
26101 | (&m_hash_table.back ()), | |
26102 | sizeof (m_hash_table.back ()), | |
26103 | m_dwarf5_byte_order, hashitpair.hash); | |
26104 | const c_str_view &name = hashitpair.it->first; | |
26105 | const std::set<symbol_value> &value_set = hashitpair.it->second; | |
26106 | m_name_table_string_offs.push_back_reorder | |
26107 | (m_debugstrlookup.lookup (name.c_str ())); | |
26108 | m_name_table_entry_offs.push_back_reorder (m_entry_pool.size ()); | |
26109 | gdb_assert (!value_set.empty ()); | |
26110 | for (const symbol_value &value : value_set) | |
26111 | { | |
26112 | int &idx = m_indexkey_to_idx[index_key (value.dwarf_tag, | |
8af5c486 JK |
26113 | value.is_static, |
26114 | value.kind)]; | |
437afbb8 JK |
26115 | if (idx == 0) |
26116 | { | |
26117 | idx = m_idx_next++; | |
26118 | m_abbrev_table.append_unsigned_leb128 (idx); | |
26119 | m_abbrev_table.append_unsigned_leb128 (value.dwarf_tag); | |
8af5c486 JK |
26120 | m_abbrev_table.append_unsigned_leb128 |
26121 | (value.kind == unit_kind::cu ? DW_IDX_compile_unit | |
26122 | : DW_IDX_type_unit); | |
437afbb8 JK |
26123 | m_abbrev_table.append_unsigned_leb128 (DW_FORM_udata); |
26124 | m_abbrev_table.append_unsigned_leb128 (value.is_static | |
26125 | ? DW_IDX_GNU_internal | |
26126 | : DW_IDX_GNU_external); | |
26127 | m_abbrev_table.append_unsigned_leb128 (DW_FORM_flag_present); | |
26128 | ||
26129 | /* Terminate attributes list. */ | |
26130 | m_abbrev_table.append_unsigned_leb128 (0); | |
26131 | m_abbrev_table.append_unsigned_leb128 (0); | |
26132 | } | |
9291a0cd | 26133 | |
437afbb8 JK |
26134 | m_entry_pool.append_unsigned_leb128 (idx); |
26135 | m_entry_pool.append_unsigned_leb128 (value.cu_index); | |
26136 | } | |
9291a0cd | 26137 | |
437afbb8 JK |
26138 | /* Terminate the list of CUs. */ |
26139 | m_entry_pool.append_unsigned_leb128 (0); | |
26140 | } | |
26141 | } | |
26142 | gdb_assert (m_hash_table.size () == name_count); | |
987d643c | 26143 | |
437afbb8 JK |
26144 | /* Terminate tags list. */ |
26145 | m_abbrev_table.append_unsigned_leb128 (0); | |
26146 | } | |
0a5429f6 | 26147 | |
437afbb8 JK |
26148 | /* Return .debug_names bucket count. This must be called only after |
26149 | calling the build method. */ | |
26150 | uint32_t bucket_count () const | |
26151 | { | |
26152 | /* Verify the build method has been already called. */ | |
26153 | gdb_assert (!m_abbrev_table.empty ()); | |
26154 | const uint32_t retval = m_bucket_table.size (); | |
26155 | ||
26156 | /* Check for overflow. */ | |
26157 | gdb_assert (retval == m_bucket_table.size ()); | |
26158 | return retval; | |
26159 | } | |
26160 | ||
26161 | /* Return .debug_names names count. This must be called only after | |
26162 | calling the build method. */ | |
26163 | uint32_t name_count () const | |
26164 | { | |
26165 | /* Verify the build method has been already called. */ | |
26166 | gdb_assert (!m_abbrev_table.empty ()); | |
26167 | const uint32_t retval = m_hash_table.size (); | |
26168 | ||
26169 | /* Check for overflow. */ | |
26170 | gdb_assert (retval == m_hash_table.size ()); | |
26171 | return retval; | |
26172 | } | |
26173 | ||
26174 | /* Return number of bytes of .debug_names abbreviation table. This | |
26175 | must be called only after calling the build method. */ | |
26176 | uint32_t abbrev_table_bytes () const | |
26177 | { | |
26178 | gdb_assert (!m_abbrev_table.empty ()); | |
26179 | return m_abbrev_table.size (); | |
26180 | } | |
26181 | ||
26182 | /* Recurse into all "included" dependencies and store their symbols | |
26183 | as if they appeared in this psymtab. */ | |
26184 | void recursively_write_psymbols | |
26185 | (struct objfile *objfile, | |
26186 | struct partial_symtab *psymtab, | |
26187 | std::unordered_set<partial_symbol *> &psyms_seen, | |
26188 | int cu_index) | |
26189 | { | |
26190 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
26191 | if (psymtab->dependencies[i]->user != NULL) | |
26192 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
26193 | psyms_seen, cu_index); | |
26194 | ||
26195 | write_psymbols (psyms_seen, | |
26196 | &objfile->global_psymbols[psymtab->globals_offset], | |
8af5c486 | 26197 | psymtab->n_global_syms, cu_index, false, unit_kind::cu); |
437afbb8 JK |
26198 | write_psymbols (psyms_seen, |
26199 | &objfile->static_psymbols[psymtab->statics_offset], | |
8af5c486 | 26200 | psymtab->n_static_syms, cu_index, true, unit_kind::cu); |
437afbb8 JK |
26201 | } |
26202 | ||
26203 | /* Return number of bytes the .debug_names section will have. This | |
26204 | must be called only after calling the build method. */ | |
26205 | size_t bytes () const | |
26206 | { | |
26207 | /* Verify the build method has been already called. */ | |
26208 | gdb_assert (!m_abbrev_table.empty ()); | |
26209 | size_t expected_bytes = 0; | |
26210 | expected_bytes += m_bucket_table.size () * sizeof (m_bucket_table[0]); | |
26211 | expected_bytes += m_hash_table.size () * sizeof (m_hash_table[0]); | |
26212 | expected_bytes += m_name_table_string_offs.bytes (); | |
26213 | expected_bytes += m_name_table_entry_offs.bytes (); | |
26214 | expected_bytes += m_abbrev_table.size (); | |
26215 | expected_bytes += m_entry_pool.size (); | |
26216 | return expected_bytes; | |
26217 | } | |
26218 | ||
26219 | /* Write .debug_names to FILE_NAMES and .debug_str addition to | |
26220 | FILE_STR. This must be called only after calling the build | |
26221 | method. */ | |
26222 | void file_write (FILE *file_names, FILE *file_str) const | |
26223 | { | |
26224 | /* Verify the build method has been already called. */ | |
26225 | gdb_assert (!m_abbrev_table.empty ()); | |
26226 | ::file_write (file_names, m_bucket_table); | |
26227 | ::file_write (file_names, m_hash_table); | |
26228 | m_name_table_string_offs.file_write (file_names); | |
26229 | m_name_table_entry_offs.file_write (file_names); | |
26230 | m_abbrev_table.file_write (file_names); | |
26231 | m_entry_pool.file_write (file_names); | |
26232 | m_debugstrlookup.file_write (file_str); | |
26233 | } | |
26234 | ||
8af5c486 JK |
26235 | /* A helper user data for write_one_signatured_type. */ |
26236 | class write_one_signatured_type_data | |
26237 | { | |
26238 | public: | |
26239 | write_one_signatured_type_data (debug_names &nametable_, | |
26240 | signatured_type_index_data &&info_) | |
26241 | : nametable (nametable_), info (std::move (info_)) | |
26242 | {} | |
26243 | debug_names &nametable; | |
26244 | struct signatured_type_index_data info; | |
26245 | }; | |
26246 | ||
26247 | /* A helper function to pass write_one_signatured_type to | |
26248 | htab_traverse_noresize. */ | |
26249 | static int | |
26250 | write_one_signatured_type (void **slot, void *d) | |
26251 | { | |
26252 | write_one_signatured_type_data *data = (write_one_signatured_type_data *) d; | |
26253 | struct signatured_type_index_data *info = &data->info; | |
26254 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
26255 | ||
26256 | data->nametable.write_one_signatured_type (entry, info); | |
26257 | ||
26258 | return 1; | |
26259 | } | |
26260 | ||
437afbb8 JK |
26261 | private: |
26262 | ||
26263 | /* Storage for symbol names mapping them to their .debug_str section | |
26264 | offsets. */ | |
26265 | class debug_str_lookup | |
26266 | { | |
26267 | public: | |
26268 | ||
26269 | /* Object costructor to be called for current DWARF2_PER_OBJFILE. | |
26270 | All .debug_str section strings are automatically stored. */ | |
26271 | debug_str_lookup () | |
26272 | : m_abfd (dwarf2_per_objfile->objfile->obfd) | |
26273 | { | |
26274 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
26275 | &dwarf2_per_objfile->str); | |
26276 | if (dwarf2_per_objfile->str.buffer == NULL) | |
26277 | return; | |
26278 | for (const gdb_byte *data = dwarf2_per_objfile->str.buffer; | |
26279 | data < (dwarf2_per_objfile->str.buffer | |
26280 | + dwarf2_per_objfile->str.size);) | |
26281 | { | |
26282 | const char *const s = reinterpret_cast<const char *> (data); | |
26283 | const auto insertpair | |
26284 | = m_str_table.emplace (c_str_view (s), | |
26285 | data - dwarf2_per_objfile->str.buffer); | |
26286 | if (!insertpair.second) | |
26287 | complaint (&symfile_complaints, | |
26288 | _("Duplicate string \"%s\" in " | |
26289 | ".debug_str section [in module %s]"), | |
26290 | s, bfd_get_filename (m_abfd)); | |
26291 | data += strlen (s) + 1; | |
26292 | } | |
26293 | } | |
26294 | ||
26295 | /* Return offset of symbol name S in the .debug_str section. Add | |
26296 | such symbol to the section's end if it does not exist there | |
26297 | yet. */ | |
26298 | size_t lookup (const char *s) | |
26299 | { | |
26300 | const auto it = m_str_table.find (c_str_view (s)); | |
26301 | if (it != m_str_table.end ()) | |
26302 | return it->second; | |
26303 | const size_t offset = (dwarf2_per_objfile->str.size | |
26304 | + m_str_add_buf.size ()); | |
26305 | m_str_table.emplace (c_str_view (s), offset); | |
26306 | m_str_add_buf.append_cstr0 (s); | |
26307 | return offset; | |
26308 | } | |
26309 | ||
26310 | /* Append the end of the .debug_str section to FILE. */ | |
26311 | void file_write (FILE *file) const | |
26312 | { | |
26313 | m_str_add_buf.file_write (file); | |
26314 | } | |
26315 | ||
26316 | private: | |
26317 | std::unordered_map<c_str_view, size_t, c_str_view_hasher> m_str_table; | |
26318 | bfd *const m_abfd; | |
26319 | ||
26320 | /* Data to add at the end of .debug_str for new needed symbol names. */ | |
26321 | data_buf m_str_add_buf; | |
26322 | }; | |
26323 | ||
26324 | /* Container to map used DWARF tags to their .debug_names abbreviation | |
26325 | tags. */ | |
26326 | class index_key | |
26327 | { | |
26328 | public: | |
8af5c486 JK |
26329 | index_key (int dwarf_tag_, bool is_static_, unit_kind kind_) |
26330 | : dwarf_tag (dwarf_tag_), is_static (is_static_), kind (kind_) | |
437afbb8 JK |
26331 | { |
26332 | } | |
26333 | ||
26334 | bool | |
26335 | operator== (const index_key &other) const | |
26336 | { | |
8af5c486 JK |
26337 | return (dwarf_tag == other.dwarf_tag && is_static == other.is_static |
26338 | && kind == other.kind); | |
437afbb8 JK |
26339 | } |
26340 | ||
26341 | const int dwarf_tag; | |
26342 | const bool is_static; | |
8af5c486 | 26343 | const unit_kind kind; |
437afbb8 JK |
26344 | }; |
26345 | ||
26346 | /* Provide std::unordered_map::hasher for index_key. */ | |
26347 | class index_key_hasher | |
26348 | { | |
26349 | public: | |
26350 | size_t | |
26351 | operator () (const index_key &key) const | |
26352 | { | |
26353 | return (std::hash<int>() (key.dwarf_tag) << 1) | key.is_static; | |
26354 | } | |
26355 | }; | |
26356 | ||
26357 | /* Parameters of one symbol entry. */ | |
26358 | class symbol_value | |
26359 | { | |
26360 | public: | |
26361 | const int dwarf_tag, cu_index; | |
26362 | const bool is_static; | |
8af5c486 | 26363 | const unit_kind kind; |
437afbb8 | 26364 | |
8af5c486 JK |
26365 | symbol_value (int dwarf_tag_, int cu_index_, bool is_static_, |
26366 | unit_kind kind_) | |
26367 | : dwarf_tag (dwarf_tag_), cu_index (cu_index_), is_static (is_static_), | |
26368 | kind (kind_) | |
437afbb8 JK |
26369 | {} |
26370 | ||
26371 | bool | |
26372 | operator< (const symbol_value &other) const | |
26373 | { | |
26374 | #define X(n) \ | |
26375 | do \ | |
26376 | { \ | |
26377 | if (n < other.n) \ | |
26378 | return true; \ | |
26379 | if (n > other.n) \ | |
26380 | return false; \ | |
26381 | } \ | |
26382 | while (0) | |
26383 | X (dwarf_tag); | |
26384 | X (is_static); | |
8af5c486 | 26385 | X (kind); |
437afbb8 JK |
26386 | X (cu_index); |
26387 | #undef X | |
26388 | return false; | |
26389 | } | |
26390 | }; | |
26391 | ||
26392 | /* Abstract base class to unify DWARF-32 and DWARF-64 name table | |
26393 | output. */ | |
26394 | class offset_vec | |
26395 | { | |
26396 | protected: | |
26397 | const bfd_endian dwarf5_byte_order; | |
26398 | public: | |
26399 | explicit offset_vec (bfd_endian dwarf5_byte_order_) | |
26400 | : dwarf5_byte_order (dwarf5_byte_order_) | |
26401 | {} | |
26402 | ||
26403 | /* Call std::vector::reserve for NELEM elements. */ | |
26404 | virtual void reserve (size_t nelem) = 0; | |
26405 | ||
26406 | /* Call std::vector::push_back with store_unsigned_integer byte | |
26407 | reordering for ELEM. */ | |
26408 | virtual void push_back_reorder (size_t elem) = 0; | |
26409 | ||
26410 | /* Return expected output size in bytes. */ | |
26411 | virtual size_t bytes () const = 0; | |
26412 | ||
26413 | /* Write name table to FILE. */ | |
26414 | virtual void file_write (FILE *file) const = 0; | |
26415 | }; | |
26416 | ||
26417 | /* Template to unify DWARF-32 and DWARF-64 output. */ | |
26418 | template<typename OffsetSize> | |
26419 | class offset_vec_tmpl : public offset_vec | |
26420 | { | |
26421 | public: | |
26422 | explicit offset_vec_tmpl (bfd_endian dwarf5_byte_order_) | |
26423 | : offset_vec (dwarf5_byte_order_) | |
26424 | {} | |
26425 | ||
26426 | /* Implement offset_vec::reserve. */ | |
26427 | void reserve (size_t nelem) override | |
26428 | { | |
26429 | m_vec.reserve (nelem); | |
26430 | } | |
26431 | ||
26432 | /* Implement offset_vec::push_back_reorder. */ | |
26433 | void push_back_reorder (size_t elem) override | |
26434 | { | |
26435 | m_vec.push_back (elem); | |
26436 | /* Check for overflow. */ | |
26437 | gdb_assert (m_vec.back () == elem); | |
26438 | store_unsigned_integer (reinterpret_cast<gdb_byte *> (&m_vec.back ()), | |
26439 | sizeof (m_vec.back ()), dwarf5_byte_order, elem); | |
26440 | } | |
26441 | ||
26442 | /* Implement offset_vec::bytes. */ | |
26443 | size_t bytes () const override | |
26444 | { | |
26445 | return m_vec.size () * sizeof (m_vec[0]); | |
26446 | } | |
26447 | ||
26448 | /* Implement offset_vec::file_write. */ | |
26449 | void file_write (FILE *file) const override | |
26450 | { | |
26451 | ::file_write (file, m_vec); | |
26452 | } | |
26453 | ||
26454 | private: | |
26455 | std::vector<OffsetSize> m_vec; | |
26456 | }; | |
26457 | ||
26458 | /* Base class to unify DWARF-32 and DWARF-64 .debug_names output | |
26459 | respecting name table width. */ | |
26460 | class dwarf | |
26461 | { | |
26462 | public: | |
26463 | offset_vec &name_table_string_offs, &name_table_entry_offs; | |
26464 | ||
26465 | dwarf (offset_vec &name_table_string_offs_, | |
26466 | offset_vec &name_table_entry_offs_) | |
26467 | : name_table_string_offs (name_table_string_offs_), | |
26468 | name_table_entry_offs (name_table_entry_offs_) | |
26469 | { | |
26470 | } | |
26471 | }; | |
e8f8bcb3 | 26472 | |
437afbb8 JK |
26473 | /* Template to unify DWARF-32 and DWARF-64 .debug_names output |
26474 | respecting name table width. */ | |
26475 | template<typename OffsetSize> | |
26476 | class dwarf_tmpl : public dwarf | |
26477 | { | |
26478 | public: | |
26479 | explicit dwarf_tmpl (bfd_endian dwarf5_byte_order_) | |
26480 | : dwarf (m_name_table_string_offs, m_name_table_entry_offs), | |
26481 | m_name_table_string_offs (dwarf5_byte_order_), | |
26482 | m_name_table_entry_offs (dwarf5_byte_order_) | |
26483 | {} | |
26484 | ||
26485 | private: | |
26486 | offset_vec_tmpl<OffsetSize> m_name_table_string_offs; | |
26487 | offset_vec_tmpl<OffsetSize> m_name_table_entry_offs; | |
26488 | }; | |
26489 | ||
26490 | /* Try to reconstruct original DWARF tag for given partial_symbol. | |
26491 | This function is not DWARF-5 compliant but it is sufficient for | |
26492 | GDB as a DWARF-5 index consumer. */ | |
26493 | static int psymbol_tag (const struct partial_symbol *psym) | |
26494 | { | |
26495 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
26496 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
26497 | ||
26498 | switch (domain) | |
26499 | { | |
26500 | case VAR_DOMAIN: | |
26501 | switch (aclass) | |
26502 | { | |
26503 | case LOC_BLOCK: | |
26504 | return DW_TAG_subprogram; | |
26505 | case LOC_TYPEDEF: | |
26506 | return DW_TAG_typedef; | |
26507 | case LOC_COMPUTED: | |
26508 | case LOC_CONST_BYTES: | |
26509 | case LOC_OPTIMIZED_OUT: | |
26510 | case LOC_STATIC: | |
26511 | return DW_TAG_variable; | |
26512 | case LOC_CONST: | |
26513 | /* Note: It's currently impossible to recognize psyms as enum values | |
26514 | short of reading the type info. For now punt. */ | |
26515 | return DW_TAG_variable; | |
26516 | default: | |
26517 | /* There are other LOC_FOO values that one might want to classify | |
26518 | as variables, but dwarf2read.c doesn't currently use them. */ | |
26519 | return DW_TAG_variable; | |
26520 | } | |
26521 | case STRUCT_DOMAIN: | |
26522 | return DW_TAG_structure_type; | |
26523 | default: | |
26524 | return 0; | |
26525 | } | |
26526 | } | |
26527 | ||
26528 | /* Call insert for all partial symbols and mark them in PSYMS_SEEN. */ | |
26529 | void write_psymbols (std::unordered_set<partial_symbol *> &psyms_seen, | |
26530 | struct partial_symbol **psymp, int count, int cu_index, | |
8af5c486 | 26531 | bool is_static, unit_kind kind) |
437afbb8 JK |
26532 | { |
26533 | for (; count-- > 0; ++psymp) | |
26534 | { | |
26535 | struct partial_symbol *psym = *psymp; | |
26536 | ||
26537 | if (SYMBOL_LANGUAGE (psym) == language_ada) | |
26538 | error (_("Ada is not currently supported by the index")); | |
26539 | ||
26540 | /* Only add a given psymbol once. */ | |
26541 | if (psyms_seen.insert (psym).second) | |
8af5c486 | 26542 | insert (psym, cu_index, is_static, kind); |
437afbb8 JK |
26543 | } |
26544 | } | |
26545 | ||
8af5c486 JK |
26546 | /* A helper function that writes a single signatured_type |
26547 | to a debug_names. */ | |
26548 | void | |
26549 | write_one_signatured_type (struct signatured_type *entry, | |
26550 | struct signatured_type_index_data *info) | |
26551 | { | |
26552 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; | |
26553 | ||
26554 | write_psymbols (info->psyms_seen, | |
26555 | &info->objfile->global_psymbols[psymtab->globals_offset], | |
26556 | psymtab->n_global_syms, info->cu_index, false, | |
26557 | unit_kind::tu); | |
26558 | write_psymbols (info->psyms_seen, | |
26559 | &info->objfile->static_psymbols[psymtab->statics_offset], | |
26560 | psymtab->n_static_syms, info->cu_index, true, | |
26561 | unit_kind::tu); | |
26562 | ||
26563 | info->types_list.append_uint (dwarf5_offset_size (), m_dwarf5_byte_order, | |
26564 | to_underlying (entry->per_cu.sect_off)); | |
26565 | ||
26566 | ++info->cu_index; | |
26567 | } | |
26568 | ||
437afbb8 JK |
26569 | /* Store value of each symbol. */ |
26570 | std::unordered_map<c_str_view, std::set<symbol_value>, c_str_view_hasher> | |
26571 | m_name_to_value_set; | |
26572 | ||
26573 | /* Tables of DWARF-5 .debug_names. They are in object file byte | |
26574 | order. */ | |
26575 | std::vector<uint32_t> m_bucket_table; | |
26576 | std::vector<uint32_t> m_hash_table; | |
26577 | ||
26578 | const bfd_endian m_dwarf5_byte_order; | |
26579 | dwarf_tmpl<uint32_t> m_dwarf32; | |
26580 | dwarf_tmpl<uint64_t> m_dwarf64; | |
26581 | dwarf &m_dwarf; | |
26582 | offset_vec &m_name_table_string_offs, &m_name_table_entry_offs; | |
26583 | debug_str_lookup m_debugstrlookup; | |
26584 | ||
26585 | /* Map each used .debug_names abbreviation tag parameter to its | |
26586 | index value. */ | |
26587 | std::unordered_map<index_key, int, index_key_hasher> m_indexkey_to_idx; | |
26588 | ||
26589 | /* Next unused .debug_names abbreviation tag for | |
26590 | m_indexkey_to_idx. */ | |
26591 | int m_idx_next = 1; | |
26592 | ||
26593 | /* .debug_names abbreviation table. */ | |
26594 | data_buf m_abbrev_table; | |
26595 | ||
26596 | /* .debug_names entry pool. */ | |
26597 | data_buf m_entry_pool; | |
26598 | }; | |
26599 | ||
26600 | /* Return iff any of the needed offsets does not fit into 32-bit | |
26601 | .debug_names section. */ | |
26602 | ||
26603 | static bool | |
26604 | check_dwarf64_offsets () | |
26605 | { | |
26606 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
26607 | { | |
26608 | const dwarf2_per_cu_data &per_cu = *dwarf2_per_objfile->all_comp_units[i]; | |
26609 | ||
26610 | if (to_underlying (per_cu.sect_off) >= (static_cast<uint64_t> (1) << 32)) | |
26611 | return true; | |
26612 | } | |
26613 | for (int i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
26614 | { | |
26615 | const signatured_type &sigtype = *dwarf2_per_objfile->all_type_units[i]; | |
26616 | const dwarf2_per_cu_data &per_cu = sigtype.per_cu; | |
26617 | ||
26618 | if (to_underlying (per_cu.sect_off) >= (static_cast<uint64_t> (1) << 32)) | |
26619 | return true; | |
26620 | } | |
26621 | return false; | |
26622 | } | |
26623 | ||
26624 | /* The psyms_seen set is potentially going to be largish (~40k | |
26625 | elements when indexing a -g3 build of GDB itself). Estimate the | |
26626 | number of elements in order to avoid too many rehashes, which | |
26627 | require rebuilding buckets and thus many trips to | |
26628 | malloc/free. */ | |
26629 | ||
26630 | static size_t | |
26631 | psyms_seen_size () | |
26632 | { | |
e8f8bcb3 PA |
26633 | size_t psyms_count = 0; |
26634 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
26635 | { | |
26636 | struct dwarf2_per_cu_data *per_cu | |
26637 | = dwarf2_per_objfile->all_comp_units[i]; | |
26638 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
26639 | ||
26640 | if (psymtab != NULL && psymtab->user == NULL) | |
26641 | recursively_count_psymbols (psymtab, psyms_count); | |
26642 | } | |
26643 | /* Generating an index for gdb itself shows a ratio of | |
26644 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
437afbb8 JK |
26645 | return psyms_count / 4; |
26646 | } | |
26647 | ||
26648 | /* Write new .gdb_index section for OBJFILE into OUT_FILE. | |
26649 | Return how many bytes were expected to be written into OUT_FILE. */ | |
26650 | ||
26651 | static size_t | |
26652 | write_gdbindex (struct objfile *objfile, FILE *out_file) | |
26653 | { | |
26654 | mapped_symtab symtab; | |
26655 | data_buf cu_list; | |
26656 | ||
26657 | /* While we're scanning CU's create a table that maps a psymtab pointer | |
26658 | (which is what addrmap records) to its index (which is what is recorded | |
26659 | in the index file). This will later be needed to write the address | |
26660 | table. */ | |
26661 | psym_index_map cu_index_htab; | |
26662 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
26663 | ||
26664 | /* The CU list is already sorted, so we don't need to do additional | |
26665 | work here. Also, the debug_types entries do not appear in | |
26666 | all_comp_units, but only in their own hash table. */ | |
26667 | ||
26668 | std::unordered_set<partial_symbol *> psyms_seen (psyms_seen_size ()); | |
bc8f2430 | 26669 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 26670 | { |
3e43a32a MS |
26671 | struct dwarf2_per_cu_data *per_cu |
26672 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 26673 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 26674 | |
92fac807 JK |
26675 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
26676 | It may be referenced from a local scope but in such case it does not | |
26677 | need to be present in .gdb_index. */ | |
26678 | if (psymtab == NULL) | |
26679 | continue; | |
26680 | ||
95554aad | 26681 | if (psymtab->user == NULL) |
bc8f2430 JK |
26682 | recursively_write_psymbols (objfile, psymtab, &symtab, |
26683 | psyms_seen, i); | |
9291a0cd | 26684 | |
bc8f2430 JK |
26685 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
26686 | gdb_assert (insertpair.second); | |
9291a0cd | 26687 | |
c2f134ac PA |
26688 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
26689 | to_underlying (per_cu->sect_off)); | |
26690 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
26691 | } |
26692 | ||
0a5429f6 | 26693 | /* Dump the address map. */ |
bc8f2430 JK |
26694 | data_buf addr_vec; |
26695 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 26696 | |
1fd400ff | 26697 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 26698 | data_buf types_cu_list; |
1fd400ff TT |
26699 | if (dwarf2_per_objfile->signatured_types) |
26700 | { | |
bc8f2430 JK |
26701 | signatured_type_index_data sig_data (types_cu_list, |
26702 | psyms_seen); | |
1fd400ff TT |
26703 | |
26704 | sig_data.objfile = objfile; | |
bc8f2430 | 26705 | sig_data.symtab = &symtab; |
1fd400ff TT |
26706 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
26707 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
26708 | write_one_signatured_type, &sig_data); | |
26709 | } | |
26710 | ||
156942c7 DE |
26711 | /* Now that we've processed all symbols we can shrink their cu_indices |
26712 | lists. */ | |
bc8f2430 | 26713 | uniquify_cu_indices (&symtab); |
156942c7 | 26714 | |
bc8f2430 JK |
26715 | data_buf symtab_vec, constant_pool; |
26716 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 26717 | |
bc8f2430 JK |
26718 | data_buf contents; |
26719 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
26720 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
26721 | |
26722 | /* The version number. */ | |
bc8f2430 | 26723 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
26724 | |
26725 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
26726 | contents.append_data (MAYBE_SWAP (total_len)); |
26727 | total_len += cu_list.size (); | |
9291a0cd | 26728 | |
1fd400ff | 26729 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
26730 | contents.append_data (MAYBE_SWAP (total_len)); |
26731 | total_len += types_cu_list.size (); | |
1fd400ff | 26732 | |
9291a0cd | 26733 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
26734 | contents.append_data (MAYBE_SWAP (total_len)); |
26735 | total_len += addr_vec.size (); | |
9291a0cd TT |
26736 | |
26737 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
26738 | contents.append_data (MAYBE_SWAP (total_len)); |
26739 | total_len += symtab_vec.size (); | |
9291a0cd TT |
26740 | |
26741 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
26742 | contents.append_data (MAYBE_SWAP (total_len)); |
26743 | total_len += constant_pool.size (); | |
9291a0cd | 26744 | |
bc8f2430 | 26745 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 26746 | |
bc8f2430 JK |
26747 | contents.file_write (out_file); |
26748 | cu_list.file_write (out_file); | |
26749 | types_cu_list.file_write (out_file); | |
26750 | addr_vec.file_write (out_file); | |
26751 | symtab_vec.file_write (out_file); | |
26752 | constant_pool.file_write (out_file); | |
9291a0cd | 26753 | |
437afbb8 JK |
26754 | return total_len; |
26755 | } | |
26756 | ||
26757 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
26758 | static const gdb_byte dwarf5_gdb_augmentation[] = { 'G', 'D', 'B', 0 }; | |
26759 | ||
26760 | /* Write a new .debug_names section for OBJFILE into OUT_FILE, write | |
26761 | needed addition to .debug_str section to OUT_FILE_STR. Return how | |
26762 | many bytes were expected to be written into OUT_FILE. */ | |
26763 | ||
26764 | static size_t | |
26765 | write_debug_names (struct objfile *objfile, FILE *out_file, FILE *out_file_str) | |
26766 | { | |
26767 | const bool dwarf5_is_dwarf64 = check_dwarf64_offsets (); | |
437afbb8 JK |
26768 | const enum bfd_endian dwarf5_byte_order |
26769 | = gdbarch_byte_order (get_objfile_arch (objfile)); | |
26770 | ||
26771 | /* The CU list is already sorted, so we don't need to do additional | |
26772 | work here. Also, the debug_types entries do not appear in | |
26773 | all_comp_units, but only in their own hash table. */ | |
26774 | data_buf cu_list; | |
26775 | debug_names nametable (dwarf5_is_dwarf64, dwarf5_byte_order); | |
26776 | std::unordered_set<partial_symbol *> psyms_seen (psyms_seen_size ()); | |
26777 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
26778 | { | |
26779 | const dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->all_comp_units[i]; | |
26780 | partial_symtab *psymtab = per_cu->v.psymtab; | |
26781 | ||
26782 | /* CU of a shared file from 'dwz -m' may be unused by this main | |
26783 | file. It may be referenced from a local scope but in such | |
26784 | case it does not need to be present in .debug_names. */ | |
26785 | if (psymtab == NULL) | |
26786 | continue; | |
26787 | ||
26788 | if (psymtab->user == NULL) | |
26789 | nametable.recursively_write_psymbols (objfile, psymtab, psyms_seen, i); | |
26790 | ||
8af5c486 | 26791 | cu_list.append_uint (nametable.dwarf5_offset_size (), dwarf5_byte_order, |
437afbb8 JK |
26792 | to_underlying (per_cu->sect_off)); |
26793 | } | |
437afbb8 | 26794 | |
8af5c486 | 26795 | /* Write out the .debug_type entries, if any. */ |
437afbb8 | 26796 | data_buf types_cu_list; |
8af5c486 | 26797 | if (dwarf2_per_objfile->signatured_types) |
437afbb8 | 26798 | { |
8af5c486 JK |
26799 | debug_names::write_one_signatured_type_data sig_data (nametable, |
26800 | signatured_type_index_data (types_cu_list, psyms_seen)); | |
437afbb8 | 26801 | |
8af5c486 JK |
26802 | sig_data.info.objfile = objfile; |
26803 | /* It is used only for gdb_index. */ | |
26804 | sig_data.info.symtab = nullptr; | |
26805 | sig_data.info.cu_index = 0; | |
26806 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
26807 | debug_names::write_one_signatured_type, | |
26808 | &sig_data); | |
437afbb8 JK |
26809 | } |
26810 | ||
8af5c486 JK |
26811 | nametable.build (); |
26812 | ||
26813 | /* No addr_vec - DWARF-5 uses .debug_aranges generated by GCC. */ | |
26814 | ||
437afbb8 JK |
26815 | const offset_type bytes_of_header |
26816 | = ((dwarf5_is_dwarf64 ? 12 : 4) | |
26817 | + 2 + 2 + 7 * 4 | |
26818 | + sizeof (dwarf5_gdb_augmentation)); | |
26819 | size_t expected_bytes = 0; | |
26820 | expected_bytes += bytes_of_header; | |
26821 | expected_bytes += cu_list.size (); | |
26822 | expected_bytes += types_cu_list.size (); | |
26823 | expected_bytes += nametable.bytes (); | |
26824 | data_buf header; | |
26825 | ||
26826 | if (!dwarf5_is_dwarf64) | |
26827 | { | |
26828 | const uint64_t size64 = expected_bytes - 4; | |
26829 | gdb_assert (size64 < 0xfffffff0); | |
26830 | header.append_uint (4, dwarf5_byte_order, size64); | |
26831 | } | |
26832 | else | |
26833 | { | |
26834 | header.append_uint (4, dwarf5_byte_order, 0xffffffff); | |
26835 | header.append_uint (8, dwarf5_byte_order, expected_bytes - 12); | |
26836 | } | |
26837 | ||
26838 | /* The version number. */ | |
26839 | header.append_uint (2, dwarf5_byte_order, 5); | |
26840 | ||
26841 | /* Padding. */ | |
26842 | header.append_uint (2, dwarf5_byte_order, 0); | |
26843 | ||
26844 | /* comp_unit_count - The number of CUs in the CU list. */ | |
26845 | header.append_uint (4, dwarf5_byte_order, dwarf2_per_objfile->n_comp_units); | |
26846 | ||
26847 | /* local_type_unit_count - The number of TUs in the local TU | |
26848 | list. */ | |
26849 | header.append_uint (4, dwarf5_byte_order, dwarf2_per_objfile->n_type_units); | |
26850 | ||
26851 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
26852 | list. */ | |
26853 | header.append_uint (4, dwarf5_byte_order, 0); | |
26854 | ||
26855 | /* bucket_count - The number of hash buckets in the hash lookup | |
26856 | table. */ | |
26857 | header.append_uint (4, dwarf5_byte_order, nametable.bucket_count ()); | |
26858 | ||
26859 | /* name_count - The number of unique names in the index. */ | |
26860 | header.append_uint (4, dwarf5_byte_order, nametable.name_count ()); | |
26861 | ||
26862 | /* abbrev_table_size - The size in bytes of the abbreviations | |
26863 | table. */ | |
26864 | header.append_uint (4, dwarf5_byte_order, nametable.abbrev_table_bytes ()); | |
26865 | ||
26866 | /* augmentation_string_size - The size in bytes of the augmentation | |
26867 | string. This value is rounded up to a multiple of 4. */ | |
26868 | static_assert (sizeof (dwarf5_gdb_augmentation) % 4 == 0, ""); | |
26869 | header.append_uint (4, dwarf5_byte_order, sizeof (dwarf5_gdb_augmentation)); | |
26870 | header.append_data (dwarf5_gdb_augmentation); | |
26871 | ||
26872 | gdb_assert (header.size () == bytes_of_header); | |
26873 | ||
26874 | header.file_write (out_file); | |
26875 | cu_list.file_write (out_file); | |
26876 | types_cu_list.file_write (out_file); | |
26877 | nametable.file_write (out_file, out_file_str); | |
26878 | ||
26879 | return expected_bytes; | |
26880 | } | |
26881 | ||
26882 | /* Assert that FILE's size is EXPECTED_SIZE. Assumes file's seek | |
26883 | position is at the end of the file. */ | |
26884 | ||
26885 | static void | |
26886 | assert_file_size (FILE *file, const char *filename, size_t expected_size) | |
26887 | { | |
26888 | const auto file_size = ftell (file); | |
26889 | if (file_size == -1) | |
26890 | error (_("Can't get `%s' size"), filename); | |
26891 | gdb_assert (file_size == expected_size); | |
26892 | } | |
26893 | ||
437afbb8 JK |
26894 | /* Create an index file for OBJFILE in the directory DIR. */ |
26895 | ||
26896 | static void | |
26897 | write_psymtabs_to_index (struct objfile *objfile, const char *dir, | |
26898 | dw_index_kind index_kind) | |
26899 | { | |
26900 | if (dwarf2_per_objfile->using_index) | |
26901 | error (_("Cannot use an index to create the index")); | |
26902 | ||
26903 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) | |
26904 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
26905 | ||
26906 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) | |
26907 | return; | |
26908 | ||
26909 | struct stat st; | |
26910 | if (stat (objfile_name (objfile), &st) < 0) | |
26911 | perror_with_name (objfile_name (objfile)); | |
26912 | ||
26913 | std::string filename (std::string (dir) + SLASH_STRING | |
26914 | + lbasename (objfile_name (objfile)) | |
26915 | + (index_kind == dw_index_kind::DEBUG_NAMES | |
26916 | ? INDEX5_SUFFIX : INDEX4_SUFFIX)); | |
26917 | ||
26918 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); | |
26919 | if (!out_file) | |
26920 | error (_("Can't open `%s' for writing"), filename.c_str ()); | |
26921 | ||
26922 | /* Order matters here; we want FILE to be closed before FILENAME is | |
26923 | unlinked, because on MS-Windows one cannot delete a file that is | |
26924 | still open. (Don't call anything here that might throw until | |
26925 | file_closer is created.) */ | |
26926 | gdb::unlinker unlink_file (filename.c_str ()); | |
26927 | gdb_file_up close_out_file (out_file); | |
26928 | ||
26929 | if (index_kind == dw_index_kind::DEBUG_NAMES) | |
26930 | { | |
26931 | std::string filename_str (std::string (dir) + SLASH_STRING | |
26932 | + lbasename (objfile_name (objfile)) | |
26933 | + DEBUG_STR_SUFFIX); | |
26934 | FILE *out_file_str | |
26935 | = gdb_fopen_cloexec (filename_str.c_str (), "wb").release (); | |
26936 | if (!out_file_str) | |
26937 | error (_("Can't open `%s' for writing"), filename_str.c_str ()); | |
26938 | gdb::unlinker unlink_file_str (filename_str.c_str ()); | |
26939 | gdb_file_up close_out_file_str (out_file_str); | |
26940 | ||
26941 | const size_t total_len | |
26942 | = write_debug_names (objfile, out_file, out_file_str); | |
26943 | assert_file_size (out_file, filename.c_str (), total_len); | |
26944 | ||
26945 | /* We want to keep the file .debug_str file too. */ | |
26946 | unlink_file_str.keep (); | |
26947 | } | |
26948 | else | |
26949 | { | |
26950 | const size_t total_len | |
26951 | = write_gdbindex (objfile, out_file); | |
26952 | assert_file_size (out_file, filename.c_str (), total_len); | |
26953 | } | |
26954 | ||
bef155c3 TT |
26955 | /* We want to keep the file. */ |
26956 | unlink_file.keep (); | |
9291a0cd TT |
26957 | } |
26958 | ||
90476074 TT |
26959 | /* Implementation of the `save gdb-index' command. |
26960 | ||
437afbb8 JK |
26961 | Note that the .gdb_index file format used by this command is |
26962 | documented in the GDB manual. Any changes here must be documented | |
26963 | there. */ | |
11570e71 | 26964 | |
9291a0cd | 26965 | static void |
8384c356 | 26966 | save_gdb_index_command (const char *arg, int from_tty) |
9291a0cd TT |
26967 | { |
26968 | struct objfile *objfile; | |
437afbb8 JK |
26969 | const char dwarf5space[] = "-dwarf-5 "; |
26970 | dw_index_kind index_kind = dw_index_kind::GDB_INDEX; | |
26971 | ||
26972 | if (!arg) | |
26973 | arg = ""; | |
26974 | ||
26975 | arg = skip_spaces (arg); | |
26976 | if (strncmp (arg, dwarf5space, strlen (dwarf5space)) == 0) | |
26977 | { | |
26978 | index_kind = dw_index_kind::DEBUG_NAMES; | |
26979 | arg += strlen (dwarf5space); | |
26980 | arg = skip_spaces (arg); | |
26981 | } | |
9291a0cd | 26982 | |
437afbb8 JK |
26983 | if (!*arg) |
26984 | error (_("usage: save gdb-index [-dwarf-5] DIRECTORY")); | |
9291a0cd TT |
26985 | |
26986 | ALL_OBJFILES (objfile) | |
26987 | { | |
26988 | struct stat st; | |
26989 | ||
26990 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 26991 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
26992 | continue; |
26993 | ||
9a3c8263 SM |
26994 | dwarf2_per_objfile |
26995 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
26996 | dwarf2_objfile_data_key); | |
9291a0cd TT |
26997 | if (dwarf2_per_objfile) |
26998 | { | |
9291a0cd | 26999 | |
492d29ea | 27000 | TRY |
9291a0cd | 27001 | { |
437afbb8 | 27002 | write_psymtabs_to_index (objfile, arg, index_kind); |
9291a0cd | 27003 | } |
492d29ea PA |
27004 | CATCH (except, RETURN_MASK_ERROR) |
27005 | { | |
27006 | exception_fprintf (gdb_stderr, except, | |
27007 | _("Error while writing index for `%s': "), | |
27008 | objfile_name (objfile)); | |
27009 | } | |
27010 | END_CATCH | |
9291a0cd TT |
27011 | } |
27012 | } | |
dce234bc PP |
27013 | } |
27014 | ||
9291a0cd TT |
27015 | \f |
27016 | ||
b4f54984 | 27017 | int dwarf_always_disassemble; |
9eae7c52 TT |
27018 | |
27019 | static void | |
b4f54984 DE |
27020 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
27021 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 27022 | { |
3e43a32a MS |
27023 | fprintf_filtered (file, |
27024 | _("Whether to always disassemble " | |
27025 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
27026 | value); |
27027 | } | |
27028 | ||
900e11f9 JK |
27029 | static void |
27030 | show_check_physname (struct ui_file *file, int from_tty, | |
27031 | struct cmd_list_element *c, const char *value) | |
27032 | { | |
27033 | fprintf_filtered (file, | |
27034 | _("Whether to check \"physname\" is %s.\n"), | |
27035 | value); | |
27036 | } | |
27037 | ||
6502dd73 DJ |
27038 | void |
27039 | _initialize_dwarf2_read (void) | |
27040 | { | |
96d19272 JK |
27041 | struct cmd_list_element *c; |
27042 | ||
dce234bc | 27043 | dwarf2_objfile_data_key |
c1bd65d0 | 27044 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 27045 | |
b4f54984 DE |
27046 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
27047 | Set DWARF specific variables.\n\ | |
27048 | Configure DWARF variables such as the cache size"), | |
27049 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
27050 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
27051 | ||
b4f54984 DE |
27052 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
27053 | Show DWARF specific variables\n\ | |
27054 | Show DWARF variables such as the cache size"), | |
27055 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
27056 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
27057 | ||
27058 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
27059 | &dwarf_max_cache_age, _("\ |
27060 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
27061 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
27062 | A higher limit means that cached compilation units will be stored\n\ |
27063 | in memory longer, and more total memory will be used. Zero disables\n\ | |
27064 | caching, which can slow down startup."), | |
2c5b56ce | 27065 | NULL, |
b4f54984 DE |
27066 | show_dwarf_max_cache_age, |
27067 | &set_dwarf_cmdlist, | |
27068 | &show_dwarf_cmdlist); | |
d97bc12b | 27069 | |
9eae7c52 | 27070 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 27071 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
27072 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
27073 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
27074 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
27075 | syntax. When disabled, expressions will be printed in a more\n\ | |
27076 | conversational style, when possible."), | |
27077 | NULL, | |
b4f54984 DE |
27078 | show_dwarf_always_disassemble, |
27079 | &set_dwarf_cmdlist, | |
27080 | &show_dwarf_cmdlist); | |
27081 | ||
27082 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
27083 | Set debugging of the DWARF reader."), _("\ | |
27084 | Show debugging of the DWARF reader."), _("\ | |
27085 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
27086 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
27087 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
27088 | NULL, |
27089 | NULL, | |
27090 | &setdebuglist, &showdebuglist); | |
27091 | ||
b4f54984 DE |
27092 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
27093 | Set debugging of the DWARF DIE reader."), _("\ | |
27094 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
27095 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
27096 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
27097 | NULL, |
27098 | NULL, | |
27099 | &setdebuglist, &showdebuglist); | |
9291a0cd | 27100 | |
27e0867f DE |
27101 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
27102 | Set debugging of the dwarf line reader."), _("\ | |
27103 | Show debugging of the dwarf line reader."), _("\ | |
27104 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
27105 | A value of 1 (one) provides basic information.\n\ | |
27106 | A value greater than 1 provides more verbose information."), | |
27107 | NULL, | |
27108 | NULL, | |
27109 | &setdebuglist, &showdebuglist); | |
27110 | ||
900e11f9 JK |
27111 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
27112 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
27113 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
27114 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
27115 | the demangler."), | |
27116 | NULL, show_check_physname, | |
27117 | &setdebuglist, &showdebuglist); | |
27118 | ||
e615022a DE |
27119 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
27120 | no_class, &use_deprecated_index_sections, _("\ | |
27121 | Set whether to use deprecated gdb_index sections."), _("\ | |
27122 | Show whether to use deprecated gdb_index sections."), _("\ | |
27123 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
27124 | Normally they are ignored either because of a missing feature or\n\ | |
27125 | performance issue.\n\ | |
27126 | Warning: This option must be enabled before gdb reads the file."), | |
27127 | NULL, | |
27128 | NULL, | |
27129 | &setlist, &showlist); | |
27130 | ||
96d19272 | 27131 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 27132 | _("\ |
fc1a9d6e | 27133 | Save a gdb-index file.\n\ |
437afbb8 JK |
27134 | Usage: save gdb-index [-dwarf-5] DIRECTORY\n\ |
27135 | \n\ | |
27136 | No options create one file with .gdb-index extension for pre-DWARF-5\n\ | |
27137 | compatible .gdb_index section. With -dwarf-5 creates two files with\n\ | |
27138 | extension .debug_names and .debug_str for DWARF-5 .debug_names section."), | |
96d19272 JK |
27139 | &save_cmdlist); |
27140 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
27141 | |
27142 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
27143 | &dwarf2_locexpr_funcs); | |
27144 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
27145 | &dwarf2_loclist_funcs); | |
27146 | ||
27147 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
27148 | &dwarf2_block_frame_base_locexpr_funcs); | |
27149 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
27150 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
27151 | |
27152 | #if GDB_SELF_TEST | |
27153 | selftests::register_test ("dw2_expand_symtabs_matching", | |
27154 | selftests::dw2_expand_symtabs_matching::run_test); | |
27155 | #endif | |
6502dd73 | 27156 | } |