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" |
bbf2f4df | 77 | #include "filename-seen-cache.h" |
b32b108a | 78 | #include "producer.h" |
c906108c | 79 | #include <fcntl.h> |
c906108c | 80 | #include <sys/types.h> |
325fac50 | 81 | #include <algorithm> |
bc8f2430 JK |
82 | #include <unordered_set> |
83 | #include <unordered_map> | |
c62446b1 | 84 | #include "selftest.h" |
d8151005 | 85 | |
73be47f5 DE |
86 | /* When == 1, print basic high level tracing messages. |
87 | When > 1, be more verbose. | |
b4f54984 DE |
88 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
89 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 90 | |
d97bc12b | 91 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 92 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 93 | |
27e0867f DE |
94 | /* When non-zero, dump line number entries as they are read in. */ |
95 | static unsigned int dwarf_line_debug = 0; | |
96 | ||
900e11f9 JK |
97 | /* When non-zero, cross-check physname against demangler. */ |
98 | static int check_physname = 0; | |
99 | ||
481860b3 | 100 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 101 | static int use_deprecated_index_sections = 0; |
481860b3 | 102 | |
6502dd73 DJ |
103 | static const struct objfile_data *dwarf2_objfile_data_key; |
104 | ||
f1e6e072 TT |
105 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
106 | ||
107 | static int dwarf2_locexpr_index; | |
108 | static int dwarf2_loclist_index; | |
109 | static int dwarf2_locexpr_block_index; | |
110 | static int dwarf2_loclist_block_index; | |
111 | ||
73869dc2 DE |
112 | /* A descriptor for dwarf sections. |
113 | ||
114 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
115 | scanned. BUFFER, READIN are filled in later when the section is read. | |
116 | If the section contained compressed data then SIZE is updated to record | |
117 | the uncompressed size of the section. | |
118 | ||
119 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
120 | creating the concept of virtual sections contained within a real section. | |
121 | In DWP V2 the sections of the input DWO files are concatenated together | |
122 | into one section, but section offsets are kept relative to the original | |
123 | input section. | |
124 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
125 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
126 | describe the virtual section. */ | |
127 | ||
dce234bc PP |
128 | struct dwarf2_section_info |
129 | { | |
73869dc2 DE |
130 | union |
131 | { | |
e5aa3347 | 132 | /* If this is a real section, the bfd section. */ |
049412e3 | 133 | asection *section; |
73869dc2 | 134 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 135 | section. */ |
73869dc2 DE |
136 | struct dwarf2_section_info *containing_section; |
137 | } s; | |
19ac8c2e | 138 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 139 | const gdb_byte *buffer; |
73869dc2 | 140 | /* The size of the section, real or virtual. */ |
dce234bc | 141 | bfd_size_type size; |
73869dc2 DE |
142 | /* If this is a virtual section, the offset in the real section. |
143 | Only valid if is_virtual. */ | |
144 | bfd_size_type virtual_offset; | |
be391dca | 145 | /* True if we have tried to read this section. */ |
73869dc2 DE |
146 | char readin; |
147 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 148 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 149 | char is_virtual; |
dce234bc PP |
150 | }; |
151 | ||
8b70b953 TT |
152 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
153 | DEF_VEC_O (dwarf2_section_info_def); | |
154 | ||
9291a0cd TT |
155 | /* All offsets in the index are of this type. It must be |
156 | architecture-independent. */ | |
157 | typedef uint32_t offset_type; | |
158 | ||
159 | DEF_VEC_I (offset_type); | |
160 | ||
156942c7 DE |
161 | /* Ensure only legit values are used. */ |
162 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
163 | do { \ | |
164 | gdb_assert ((unsigned int) (value) <= 1); \ | |
165 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
166 | } while (0) | |
167 | ||
168 | /* Ensure only legit values are used. */ | |
169 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
170 | do { \ | |
171 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
172 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
173 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
174 | } while (0) | |
175 | ||
176 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
177 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
178 | do { \ | |
179 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
180 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
181 | } while (0) | |
182 | ||
3f563c84 PA |
183 | #if WORDS_BIGENDIAN |
184 | ||
185 | /* Convert VALUE between big- and little-endian. */ | |
186 | ||
187 | static offset_type | |
188 | byte_swap (offset_type value) | |
189 | { | |
190 | offset_type result; | |
191 | ||
192 | result = (value & 0xff) << 24; | |
193 | result |= (value & 0xff00) << 8; | |
194 | result |= (value & 0xff0000) >> 8; | |
195 | result |= (value & 0xff000000) >> 24; | |
196 | return result; | |
197 | } | |
198 | ||
199 | #define MAYBE_SWAP(V) byte_swap (V) | |
200 | ||
201 | #else | |
202 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) | |
203 | #endif /* WORDS_BIGENDIAN */ | |
204 | ||
205 | /* An index into a (C++) symbol name component in a symbol name as | |
206 | recorded in the mapped_index's symbol table. For each C++ symbol | |
207 | in the symbol table, we record one entry for the start of each | |
208 | component in the symbol in a table of name components, and then | |
209 | sort the table, in order to be able to binary search symbol names, | |
210 | ignoring leading namespaces, both completion and regular look up. | |
211 | For example, for symbol "A::B::C", we'll have an entry that points | |
212 | to "A::B::C", another that points to "B::C", and another for "C". | |
213 | Note that function symbols in GDB index have no parameter | |
214 | information, just the function/method names. You can convert a | |
215 | name_component to a "const char *" using the | |
216 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
217 | ||
218 | struct name_component | |
219 | { | |
220 | /* Offset in the symbol name where the component starts. Stored as | |
221 | a (32-bit) offset instead of a pointer to save memory and improve | |
222 | locality on 64-bit architectures. */ | |
223 | offset_type name_offset; | |
224 | ||
225 | /* The symbol's index in the symbol and constant pool tables of a | |
226 | mapped_index. */ | |
227 | offset_type idx; | |
228 | }; | |
229 | ||
9291a0cd TT |
230 | /* A description of the mapped index. The file format is described in |
231 | a comment by the code that writes the index. */ | |
232 | struct mapped_index | |
233 | { | |
559a7a62 JK |
234 | /* Index data format version. */ |
235 | int version; | |
236 | ||
9291a0cd TT |
237 | /* The total length of the buffer. */ |
238 | off_t total_size; | |
b11b1f88 | 239 | |
9291a0cd TT |
240 | /* A pointer to the address table data. */ |
241 | const gdb_byte *address_table; | |
b11b1f88 | 242 | |
9291a0cd TT |
243 | /* Size of the address table data in bytes. */ |
244 | offset_type address_table_size; | |
b11b1f88 | 245 | |
3876f04e DE |
246 | /* The symbol table, implemented as a hash table. */ |
247 | const offset_type *symbol_table; | |
b11b1f88 | 248 | |
9291a0cd | 249 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 250 | offset_type symbol_table_slots; |
b11b1f88 | 251 | |
9291a0cd TT |
252 | /* A pointer to the constant pool. */ |
253 | const char *constant_pool; | |
3f563c84 PA |
254 | |
255 | /* The name_component table (a sorted vector). See name_component's | |
256 | description above. */ | |
257 | std::vector<name_component> name_components; | |
258 | ||
5c58de74 PA |
259 | /* How NAME_COMPONENTS is sorted. */ |
260 | enum case_sensitivity name_components_casing; | |
261 | ||
3f563c84 PA |
262 | /* Convenience method to get at the name of the symbol at IDX in the |
263 | symbol table. */ | |
264 | const char *symbol_name_at (offset_type idx) const | |
265 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx]); } | |
5c58de74 PA |
266 | |
267 | /* Build the symbol name component sorted vector, if we haven't | |
268 | yet. */ | |
269 | void build_name_components (); | |
270 | ||
271 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
272 | possible matches for LN_NO_PARAMS in the name component | |
273 | vector. */ | |
274 | std::pair<std::vector<name_component>::const_iterator, | |
275 | std::vector<name_component>::const_iterator> | |
276 | find_name_components_bounds (const lookup_name_info &ln_no_params) const; | |
9291a0cd TT |
277 | }; |
278 | ||
95554aad TT |
279 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
280 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
281 | ||
52059ffd TT |
282 | struct tu_stats |
283 | { | |
284 | int nr_uniq_abbrev_tables; | |
285 | int nr_symtabs; | |
286 | int nr_symtab_sharers; | |
287 | int nr_stmt_less_type_units; | |
288 | int nr_all_type_units_reallocs; | |
289 | }; | |
290 | ||
9cdd5dbd DE |
291 | /* Collection of data recorded per objfile. |
292 | This hangs off of dwarf2_objfile_data_key. */ | |
293 | ||
6502dd73 DJ |
294 | struct dwarf2_per_objfile |
295 | { | |
330cdd98 PA |
296 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
297 | dwarf2 section names, or is NULL if the standard ELF names are | |
298 | used. */ | |
299 | dwarf2_per_objfile (struct objfile *objfile, | |
300 | const dwarf2_debug_sections *names); | |
ae038cb0 | 301 | |
330cdd98 PA |
302 | ~dwarf2_per_objfile (); |
303 | ||
d6541620 | 304 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
305 | |
306 | /* Free all cached compilation units. */ | |
307 | void free_cached_comp_units (); | |
308 | private: | |
309 | /* This function is mapped across the sections and remembers the | |
310 | offset and size of each of the debugging sections we are | |
311 | interested in. */ | |
312 | void locate_sections (bfd *abfd, asection *sectp, | |
313 | const dwarf2_debug_sections &names); | |
314 | ||
315 | public: | |
316 | dwarf2_section_info info {}; | |
317 | dwarf2_section_info abbrev {}; | |
318 | dwarf2_section_info line {}; | |
319 | dwarf2_section_info loc {}; | |
320 | dwarf2_section_info loclists {}; | |
321 | dwarf2_section_info macinfo {}; | |
322 | dwarf2_section_info macro {}; | |
323 | dwarf2_section_info str {}; | |
324 | dwarf2_section_info line_str {}; | |
325 | dwarf2_section_info ranges {}; | |
326 | dwarf2_section_info rnglists {}; | |
327 | dwarf2_section_info addr {}; | |
328 | dwarf2_section_info frame {}; | |
329 | dwarf2_section_info eh_frame {}; | |
330 | dwarf2_section_info gdb_index {}; | |
331 | ||
332 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 333 | |
be391dca | 334 | /* Back link. */ |
330cdd98 | 335 | struct objfile *objfile = NULL; |
be391dca | 336 | |
d467dd73 | 337 | /* Table of all the compilation units. This is used to locate |
10b3939b | 338 | the target compilation unit of a particular reference. */ |
330cdd98 | 339 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
340 | |
341 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 342 | int n_comp_units = 0; |
ae038cb0 | 343 | |
1fd400ff | 344 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 345 | int n_type_units = 0; |
1fd400ff | 346 | |
6aa5f3a6 DE |
347 | /* The number of elements allocated in all_type_units. |
348 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 349 | int n_allocated_type_units = 0; |
6aa5f3a6 | 350 | |
a2ce51a0 DE |
351 | /* The .debug_types-related CUs (TUs). |
352 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 353 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 354 | |
f4dc4d17 DE |
355 | /* Table of struct type_unit_group objects. |
356 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 357 | htab_t type_unit_groups {}; |
72dca2f5 | 358 | |
348e048f DE |
359 | /* A table mapping .debug_types signatures to its signatured_type entry. |
360 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 361 | htab_t signatured_types {}; |
348e048f | 362 | |
f4dc4d17 DE |
363 | /* Type unit statistics, to see how well the scaling improvements |
364 | are doing. */ | |
330cdd98 | 365 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
366 | |
367 | /* A chain of compilation units that are currently read in, so that | |
368 | they can be freed later. */ | |
330cdd98 | 369 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 370 | |
3019eac3 DE |
371 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
372 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 373 | htab_t dwo_files {}; |
3019eac3 | 374 | |
330cdd98 PA |
375 | /* True if we've checked for whether there is a DWP file. */ |
376 | bool dwp_checked = false; | |
80626a55 DE |
377 | |
378 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 379 | struct dwp_file *dwp_file = NULL; |
80626a55 | 380 | |
36586728 TT |
381 | /* The shared '.dwz' file, if one exists. This is used when the |
382 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 383 | struct dwz_file *dwz_file = NULL; |
36586728 | 384 | |
330cdd98 | 385 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 386 | VMA of 0. */ |
330cdd98 | 387 | bool has_section_at_zero = false; |
9291a0cd | 388 | |
ae2de4f8 DE |
389 | /* True if we are using the mapped index, |
390 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 391 | bool using_index = false; |
9291a0cd | 392 | |
ae2de4f8 | 393 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 394 | mapped_index *index_table = NULL; |
98bfdba5 | 395 | |
7b9f3c50 | 396 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
397 | TUs typically share line table entries with a CU, so we maintain a |
398 | separate table of all line table entries to support the sharing. | |
399 | Note that while there can be way more TUs than CUs, we've already | |
400 | sorted all the TUs into "type unit groups", grouped by their | |
401 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
402 | CU and its associated TU group if there is one. */ | |
330cdd98 | 403 | htab_t quick_file_names_table {}; |
7b9f3c50 | 404 | |
98bfdba5 PA |
405 | /* Set during partial symbol reading, to prevent queueing of full |
406 | symbols. */ | |
330cdd98 | 407 | bool reading_partial_symbols = false; |
673bfd45 | 408 | |
dee91e82 | 409 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 410 | This is NULL if not allocated yet. |
02142a6c | 411 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 412 | htab_t die_type_hash {}; |
95554aad TT |
413 | |
414 | /* The CUs we recently read. */ | |
330cdd98 | 415 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
416 | |
417 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 418 | htab_t line_header_hash {}; |
bbf2f4df PA |
419 | |
420 | /* Table containing all filenames. This is an optional because the | |
421 | table is lazily constructed on first access. */ | |
422 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
423 | }; |
424 | ||
425 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 426 | |
251d32d9 | 427 | /* Default names of the debugging sections. */ |
c906108c | 428 | |
233a11ab CS |
429 | /* Note that if the debugging section has been compressed, it might |
430 | have a name like .zdebug_info. */ | |
431 | ||
9cdd5dbd DE |
432 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
433 | { | |
251d32d9 TG |
434 | { ".debug_info", ".zdebug_info" }, |
435 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
436 | { ".debug_line", ".zdebug_line" }, | |
437 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 438 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 439 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 440 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 441 | { ".debug_str", ".zdebug_str" }, |
43988095 | 442 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 443 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 444 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 445 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 446 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
447 | { ".debug_frame", ".zdebug_frame" }, |
448 | { ".eh_frame", NULL }, | |
24d3216f TT |
449 | { ".gdb_index", ".zgdb_index" }, |
450 | 23 | |
251d32d9 | 451 | }; |
c906108c | 452 | |
80626a55 | 453 | /* List of DWO/DWP sections. */ |
3019eac3 | 454 | |
80626a55 | 455 | static const struct dwop_section_names |
3019eac3 DE |
456 | { |
457 | struct dwarf2_section_names abbrev_dwo; | |
458 | struct dwarf2_section_names info_dwo; | |
459 | struct dwarf2_section_names line_dwo; | |
460 | struct dwarf2_section_names loc_dwo; | |
43988095 | 461 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
462 | struct dwarf2_section_names macinfo_dwo; |
463 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
464 | struct dwarf2_section_names str_dwo; |
465 | struct dwarf2_section_names str_offsets_dwo; | |
466 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
467 | struct dwarf2_section_names cu_index; |
468 | struct dwarf2_section_names tu_index; | |
3019eac3 | 469 | } |
80626a55 | 470 | dwop_section_names = |
3019eac3 DE |
471 | { |
472 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
473 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
474 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
475 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 476 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
477 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
478 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
479 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
480 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
481 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
482 | { ".debug_cu_index", ".zdebug_cu_index" }, |
483 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
484 | }; |
485 | ||
c906108c SS |
486 | /* local data types */ |
487 | ||
107d2387 AC |
488 | /* The data in a compilation unit header, after target2host |
489 | translation, looks like this. */ | |
c906108c | 490 | struct comp_unit_head |
a738430d | 491 | { |
c764a876 | 492 | unsigned int length; |
a738430d | 493 | short version; |
a738430d MK |
494 | unsigned char addr_size; |
495 | unsigned char signed_addr_p; | |
9c541725 | 496 | sect_offset abbrev_sect_off; |
57349743 | 497 | |
a738430d MK |
498 | /* Size of file offsets; either 4 or 8. */ |
499 | unsigned int offset_size; | |
57349743 | 500 | |
a738430d MK |
501 | /* Size of the length field; either 4 or 12. */ |
502 | unsigned int initial_length_size; | |
57349743 | 503 | |
43988095 JK |
504 | enum dwarf_unit_type unit_type; |
505 | ||
a738430d MK |
506 | /* Offset to the first byte of this compilation unit header in the |
507 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 508 | sect_offset sect_off; |
57349743 | 509 | |
d00adf39 DE |
510 | /* Offset to first die in this cu from the start of the cu. |
511 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 512 | cu_offset first_die_cu_offset; |
43988095 JK |
513 | |
514 | /* 64-bit signature of this type unit - it is valid only for | |
515 | UNIT_TYPE DW_UT_type. */ | |
516 | ULONGEST signature; | |
517 | ||
518 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 519 | cu_offset type_cu_offset_in_tu; |
a738430d | 520 | }; |
c906108c | 521 | |
3da10d80 KS |
522 | /* Type used for delaying computation of method physnames. |
523 | See comments for compute_delayed_physnames. */ | |
524 | struct delayed_method_info | |
525 | { | |
526 | /* The type to which the method is attached, i.e., its parent class. */ | |
527 | struct type *type; | |
528 | ||
529 | /* The index of the method in the type's function fieldlists. */ | |
530 | int fnfield_index; | |
531 | ||
532 | /* The index of the method in the fieldlist. */ | |
533 | int index; | |
534 | ||
535 | /* The name of the DIE. */ | |
536 | const char *name; | |
537 | ||
538 | /* The DIE associated with this method. */ | |
539 | struct die_info *die; | |
540 | }; | |
541 | ||
542 | typedef struct delayed_method_info delayed_method_info; | |
543 | DEF_VEC_O (delayed_method_info); | |
544 | ||
e7c27a73 DJ |
545 | /* Internal state when decoding a particular compilation unit. */ |
546 | struct dwarf2_cu | |
547 | { | |
548 | /* The objfile containing this compilation unit. */ | |
549 | struct objfile *objfile; | |
550 | ||
d00adf39 | 551 | /* The header of the compilation unit. */ |
e7c27a73 | 552 | struct comp_unit_head header; |
e142c38c | 553 | |
d00adf39 DE |
554 | /* Base address of this compilation unit. */ |
555 | CORE_ADDR base_address; | |
556 | ||
557 | /* Non-zero if base_address has been set. */ | |
558 | int base_known; | |
559 | ||
e142c38c DJ |
560 | /* The language we are debugging. */ |
561 | enum language language; | |
562 | const struct language_defn *language_defn; | |
563 | ||
b0f35d58 DL |
564 | const char *producer; |
565 | ||
e142c38c DJ |
566 | /* The generic symbol table building routines have separate lists for |
567 | file scope symbols and all all other scopes (local scopes). So | |
568 | we need to select the right one to pass to add_symbol_to_list(). | |
569 | We do it by keeping a pointer to the correct list in list_in_scope. | |
570 | ||
571 | FIXME: The original dwarf code just treated the file scope as the | |
572 | first local scope, and all other local scopes as nested local | |
573 | scopes, and worked fine. Check to see if we really need to | |
574 | distinguish these in buildsym.c. */ | |
575 | struct pending **list_in_scope; | |
576 | ||
433df2d4 DE |
577 | /* The abbrev table for this CU. |
578 | Normally this points to the abbrev table in the objfile. | |
579 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
580 | struct abbrev_table *abbrev_table; | |
72bf9492 | 581 | |
b64f50a1 JK |
582 | /* Hash table holding all the loaded partial DIEs |
583 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
584 | htab_t partial_dies; |
585 | ||
586 | /* Storage for things with the same lifetime as this read-in compilation | |
587 | unit, including partial DIEs. */ | |
588 | struct obstack comp_unit_obstack; | |
589 | ||
ae038cb0 DJ |
590 | /* When multiple dwarf2_cu structures are living in memory, this field |
591 | chains them all together, so that they can be released efficiently. | |
592 | We will probably also want a generation counter so that most-recently-used | |
593 | compilation units are cached... */ | |
594 | struct dwarf2_per_cu_data *read_in_chain; | |
595 | ||
69d751e3 | 596 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
597 | struct dwarf2_per_cu_data *per_cu; |
598 | ||
599 | /* How many compilation units ago was this CU last referenced? */ | |
600 | int last_used; | |
601 | ||
b64f50a1 JK |
602 | /* A hash table of DIE cu_offset for following references with |
603 | die_info->offset.sect_off as hash. */ | |
51545339 | 604 | htab_t die_hash; |
10b3939b DJ |
605 | |
606 | /* Full DIEs if read in. */ | |
607 | struct die_info *dies; | |
608 | ||
609 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
610 | units referenced by this one. Only set during full symbol processing; | |
611 | partial symbol tables do not have dependencies. */ | |
612 | htab_t dependencies; | |
613 | ||
cb1df416 DJ |
614 | /* Header data from the line table, during full symbol processing. */ |
615 | struct line_header *line_header; | |
4c8aa72d PA |
616 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
617 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
618 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
619 | to the line header as long as this DIE is being processed. See | |
620 | process_die_scope. */ | |
621 | die_info *line_header_die_owner; | |
cb1df416 | 622 | |
3da10d80 KS |
623 | /* A list of methods which need to have physnames computed |
624 | after all type information has been read. */ | |
625 | VEC (delayed_method_info) *method_list; | |
626 | ||
96408a79 SA |
627 | /* To be copied to symtab->call_site_htab. */ |
628 | htab_t call_site_htab; | |
629 | ||
034e5797 DE |
630 | /* Non-NULL if this CU came from a DWO file. |
631 | There is an invariant here that is important to remember: | |
632 | Except for attributes copied from the top level DIE in the "main" | |
633 | (or "stub") file in preparation for reading the DWO file | |
634 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
635 | Either there isn't a DWO file (in which case this is NULL and the point | |
636 | is moot), or there is and either we're not going to read it (in which | |
637 | case this is NULL) or there is and we are reading it (in which case this | |
638 | is non-NULL). */ | |
3019eac3 DE |
639 | struct dwo_unit *dwo_unit; |
640 | ||
641 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
642 | (zero is a valid value though). | |
1dbab08b | 643 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
644 | ULONGEST addr_base; |
645 | ||
2e3cf129 DE |
646 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
647 | (zero is a valid value though). | |
1dbab08b | 648 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 649 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
650 | be used without needing to know whether DWO files are in use or not. |
651 | N.B. This does not apply to DW_AT_ranges appearing in | |
652 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
653 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
654 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
655 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
656 | ULONGEST ranges_base; |
657 | ||
ae038cb0 DJ |
658 | /* Mark used when releasing cached dies. */ |
659 | unsigned int mark : 1; | |
660 | ||
8be455d7 JK |
661 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
662 | This test is imperfect as there may exist optimized debug code not using | |
663 | any location list and still facing inlining issues if handled as | |
664 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 665 | unsigned int has_loclist : 1; |
ba919b58 | 666 | |
1b80a9fa JK |
667 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
668 | if all the producer_is_* fields are valid. This information is cached | |
669 | because profiling CU expansion showed excessive time spent in | |
670 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
671 | unsigned int checked_producer : 1; |
672 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 673 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 674 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
675 | |
676 | /* When set, the file that we're processing is known to have | |
677 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
678 | this information, but later versions do. */ | |
679 | ||
680 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
681 | }; |
682 | ||
10b3939b DJ |
683 | /* Persistent data held for a compilation unit, even when not |
684 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 685 | read_symtab_private field of the psymtab. */ |
10b3939b | 686 | |
ae038cb0 DJ |
687 | struct dwarf2_per_cu_data |
688 | { | |
36586728 | 689 | /* The start offset and length of this compilation unit. |
45452591 | 690 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
691 | initial_length_size. |
692 | If the DIE refers to a DWO file, this is always of the original die, | |
693 | not the DWO file. */ | |
9c541725 | 694 | sect_offset sect_off; |
36586728 | 695 | unsigned int length; |
ae038cb0 | 696 | |
43988095 JK |
697 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
698 | short dwarf_version; | |
699 | ||
ae038cb0 DJ |
700 | /* Flag indicating this compilation unit will be read in before |
701 | any of the current compilation units are processed. */ | |
c764a876 | 702 | unsigned int queued : 1; |
ae038cb0 | 703 | |
0d99eb77 DE |
704 | /* This flag will be set when reading partial DIEs if we need to load |
705 | absolutely all DIEs for this compilation unit, instead of just the ones | |
706 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
707 | hash table and don't find it. */ |
708 | unsigned int load_all_dies : 1; | |
709 | ||
0186c6a7 DE |
710 | /* Non-zero if this CU is from .debug_types. |
711 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
712 | this is non-zero. */ | |
3019eac3 DE |
713 | unsigned int is_debug_types : 1; |
714 | ||
36586728 TT |
715 | /* Non-zero if this CU is from the .dwz file. */ |
716 | unsigned int is_dwz : 1; | |
717 | ||
a2ce51a0 DE |
718 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
719 | This flag is only valid if is_debug_types is true. | |
720 | We can't read a CU directly from a DWO file: There are required | |
721 | attributes in the stub. */ | |
722 | unsigned int reading_dwo_directly : 1; | |
723 | ||
7ee85ab1 DE |
724 | /* Non-zero if the TU has been read. |
725 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
726 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
727 | fetching them from random other DWOs (due to comdat folding). | |
728 | If the TU has already been read, the optimization is unnecessary | |
729 | (and unwise - we don't want to change where gdb thinks the TU lives | |
730 | "midflight"). | |
731 | This flag is only valid if is_debug_types is true. */ | |
732 | unsigned int tu_read : 1; | |
733 | ||
3019eac3 DE |
734 | /* The section this CU/TU lives in. |
735 | If the DIE refers to a DWO file, this is always the original die, | |
736 | not the DWO file. */ | |
8a0459fd | 737 | struct dwarf2_section_info *section; |
348e048f | 738 | |
17ea53c3 | 739 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
740 | of the CU cache it gets reset to NULL again. This is left as NULL for |
741 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 742 | struct dwarf2_cu *cu; |
1c379e20 | 743 | |
9cdd5dbd DE |
744 | /* The corresponding objfile. |
745 | Normally we can get the objfile from dwarf2_per_objfile. | |
746 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
747 | struct objfile *objfile; |
748 | ||
fffbe6a8 YQ |
749 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
750 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
751 | union |
752 | { | |
753 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 754 | or NULL for unread partial units. */ |
9291a0cd TT |
755 | struct partial_symtab *psymtab; |
756 | ||
757 | /* Data needed by the "quick" functions. */ | |
758 | struct dwarf2_per_cu_quick_data *quick; | |
759 | } v; | |
95554aad | 760 | |
796a7ff8 DE |
761 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
762 | while reading psymtabs, used to compute the psymtab dependencies, | |
763 | and then cleared. Then it is filled in again while reading full | |
764 | symbols, and only deleted when the objfile is destroyed. | |
765 | ||
766 | This is also used to work around a difference between the way gold | |
767 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
768 | is a gold bug. For symbols coming from TUs, gold records in the index | |
769 | the CU that includes the TU instead of the TU itself. This breaks | |
770 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
771 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
772 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
773 | we need to look in TU Z to find X. Fortunately, this is akin to | |
774 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
775 | .gdb_index version <=7 this also records the TUs that the CU referred | |
776 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
777 | indices so we only pay a price for gold generated indices. |
778 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 779 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
780 | }; |
781 | ||
348e048f DE |
782 | /* Entry in the signatured_types hash table. */ |
783 | ||
784 | struct signatured_type | |
785 | { | |
42e7ad6c | 786 | /* The "per_cu" object of this type. |
ac9ec31b | 787 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
788 | N.B.: This is the first member so that it's easy to convert pointers |
789 | between them. */ | |
790 | struct dwarf2_per_cu_data per_cu; | |
791 | ||
3019eac3 | 792 | /* The type's signature. */ |
348e048f DE |
793 | ULONGEST signature; |
794 | ||
3019eac3 | 795 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
796 | If this TU is a DWO stub and the definition lives in a DWO file |
797 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
798 | cu_offset type_offset_in_tu; |
799 | ||
800 | /* Offset in the section of the type's DIE. | |
801 | If the definition lives in a DWO file, this is the offset in the | |
802 | .debug_types.dwo section. | |
803 | The value is zero until the actual value is known. | |
804 | Zero is otherwise not a valid section offset. */ | |
805 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
806 | |
807 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
808 | can share them. This points to the containing symtab. */ | |
809 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
810 | |
811 | /* The type. | |
812 | The first time we encounter this type we fully read it in and install it | |
813 | in the symbol tables. Subsequent times we only need the type. */ | |
814 | struct type *type; | |
a2ce51a0 DE |
815 | |
816 | /* Containing DWO unit. | |
817 | This field is valid iff per_cu.reading_dwo_directly. */ | |
818 | struct dwo_unit *dwo_unit; | |
348e048f DE |
819 | }; |
820 | ||
0186c6a7 DE |
821 | typedef struct signatured_type *sig_type_ptr; |
822 | DEF_VEC_P (sig_type_ptr); | |
823 | ||
094b34ac DE |
824 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
825 | This includes type_unit_group and quick_file_names. */ | |
826 | ||
827 | struct stmt_list_hash | |
828 | { | |
829 | /* The DWO unit this table is from or NULL if there is none. */ | |
830 | struct dwo_unit *dwo_unit; | |
831 | ||
832 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 833 | sect_offset line_sect_off; |
094b34ac DE |
834 | }; |
835 | ||
f4dc4d17 DE |
836 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
837 | an object of this type. */ | |
838 | ||
839 | struct type_unit_group | |
840 | { | |
0186c6a7 | 841 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
842 | To simplify things we create an artificial CU that "includes" all the |
843 | type units using this stmt_list so that the rest of the code still has | |
844 | a "per_cu" handle on the symtab. | |
845 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 846 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
847 | struct dwarf2_per_cu_data per_cu; |
848 | ||
0186c6a7 DE |
849 | /* The TUs that share this DW_AT_stmt_list entry. |
850 | This is added to while parsing type units to build partial symtabs, | |
851 | and is deleted afterwards and not used again. */ | |
852 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 853 | |
43f3e411 | 854 | /* The compunit symtab. |
094b34ac | 855 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
856 | so we create an essentially anonymous symtab as the compunit symtab. */ |
857 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 858 | |
094b34ac DE |
859 | /* The data used to construct the hash key. */ |
860 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
861 | |
862 | /* The number of symtabs from the line header. | |
863 | The value here must match line_header.num_file_names. */ | |
864 | unsigned int num_symtabs; | |
865 | ||
866 | /* The symbol tables for this TU (obtained from the files listed in | |
867 | DW_AT_stmt_list). | |
868 | WARNING: The order of entries here must match the order of entries | |
869 | in the line header. After the first TU using this type_unit_group, the | |
870 | line header for the subsequent TUs is recreated from this. This is done | |
871 | because we need to use the same symtabs for each TU using the same | |
872 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
873 | there's no guarantee the line header doesn't have duplicate entries. */ | |
874 | struct symtab **symtabs; | |
875 | }; | |
876 | ||
73869dc2 | 877 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
878 | |
879 | struct dwo_sections | |
880 | { | |
881 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
882 | struct dwarf2_section_info line; |
883 | struct dwarf2_section_info loc; | |
43988095 | 884 | struct dwarf2_section_info loclists; |
09262596 DE |
885 | struct dwarf2_section_info macinfo; |
886 | struct dwarf2_section_info macro; | |
3019eac3 DE |
887 | struct dwarf2_section_info str; |
888 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
889 | /* In the case of a virtual DWO file, these two are unused. */ |
890 | struct dwarf2_section_info info; | |
3019eac3 DE |
891 | VEC (dwarf2_section_info_def) *types; |
892 | }; | |
893 | ||
c88ee1f0 | 894 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
895 | |
896 | struct dwo_unit | |
897 | { | |
898 | /* Backlink to the containing struct dwo_file. */ | |
899 | struct dwo_file *dwo_file; | |
900 | ||
901 | /* The "id" that distinguishes this CU/TU. | |
902 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
903 | Since signatures came first, we stick with it for consistency. */ | |
904 | ULONGEST signature; | |
905 | ||
906 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 907 | struct dwarf2_section_info *section; |
3019eac3 | 908 | |
9c541725 PA |
909 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
910 | sect_offset sect_off; | |
3019eac3 DE |
911 | unsigned int length; |
912 | ||
913 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
914 | cu_offset type_offset_in_tu; | |
915 | }; | |
916 | ||
73869dc2 DE |
917 | /* include/dwarf2.h defines the DWP section codes. |
918 | It defines a max value but it doesn't define a min value, which we | |
919 | use for error checking, so provide one. */ | |
920 | ||
921 | enum dwp_v2_section_ids | |
922 | { | |
923 | DW_SECT_MIN = 1 | |
924 | }; | |
925 | ||
80626a55 | 926 | /* Data for one DWO file. |
57d63ce2 DE |
927 | |
928 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
929 | appears in a DWP file). DWP files don't really have DWO files per se - | |
930 | comdat folding of types "loses" the DWO file they came from, and from | |
931 | a high level view DWP files appear to contain a mass of random types. | |
932 | However, to maintain consistency with the non-DWP case we pretend DWP | |
933 | files contain virtual DWO files, and we assign each TU with one virtual | |
934 | DWO file (generally based on the line and abbrev section offsets - | |
935 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
936 | |
937 | struct dwo_file | |
938 | { | |
0ac5b59e | 939 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
940 | For virtual DWO files the name is constructed from the section offsets |
941 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
942 | from related CU+TUs. */ | |
0ac5b59e DE |
943 | const char *dwo_name; |
944 | ||
945 | /* The DW_AT_comp_dir attribute. */ | |
946 | const char *comp_dir; | |
3019eac3 | 947 | |
80626a55 DE |
948 | /* The bfd, when the file is open. Otherwise this is NULL. |
949 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
950 | bfd *dbfd; | |
3019eac3 | 951 | |
73869dc2 DE |
952 | /* The sections that make up this DWO file. |
953 | Remember that for virtual DWO files in DWP V2, these are virtual | |
954 | sections (for lack of a better name). */ | |
3019eac3 DE |
955 | struct dwo_sections sections; |
956 | ||
33c5cd75 DB |
957 | /* The CUs in the file. |
958 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
959 | an extension to handle LLVM's Link Time Optimization output (where | |
960 | multiple source files may be compiled into a single object/dwo pair). */ | |
961 | htab_t cus; | |
3019eac3 DE |
962 | |
963 | /* Table of TUs in the file. | |
964 | Each element is a struct dwo_unit. */ | |
965 | htab_t tus; | |
966 | }; | |
967 | ||
80626a55 DE |
968 | /* These sections are what may appear in a DWP file. */ |
969 | ||
970 | struct dwp_sections | |
971 | { | |
73869dc2 | 972 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
973 | struct dwarf2_section_info str; |
974 | struct dwarf2_section_info cu_index; | |
975 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
976 | |
977 | /* These are only used by DWP version 2 files. | |
978 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
979 | sections are referenced by section number, and are not recorded here. | |
980 | In DWP version 2 there is at most one copy of all these sections, each | |
981 | section being (effectively) comprised of the concatenation of all of the | |
982 | individual sections that exist in the version 1 format. | |
983 | To keep the code simple we treat each of these concatenated pieces as a | |
984 | section itself (a virtual section?). */ | |
985 | struct dwarf2_section_info abbrev; | |
986 | struct dwarf2_section_info info; | |
987 | struct dwarf2_section_info line; | |
988 | struct dwarf2_section_info loc; | |
989 | struct dwarf2_section_info macinfo; | |
990 | struct dwarf2_section_info macro; | |
991 | struct dwarf2_section_info str_offsets; | |
992 | struct dwarf2_section_info types; | |
80626a55 DE |
993 | }; |
994 | ||
73869dc2 DE |
995 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
996 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 997 | |
73869dc2 | 998 | struct virtual_v1_dwo_sections |
80626a55 DE |
999 | { |
1000 | struct dwarf2_section_info abbrev; | |
1001 | struct dwarf2_section_info line; | |
1002 | struct dwarf2_section_info loc; | |
1003 | struct dwarf2_section_info macinfo; | |
1004 | struct dwarf2_section_info macro; | |
1005 | struct dwarf2_section_info str_offsets; | |
1006 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 1007 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
1008 | struct dwarf2_section_info info_or_types; |
1009 | }; | |
1010 | ||
73869dc2 DE |
1011 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
1012 | In version 2, the sections of the DWO files are concatenated together | |
1013 | and stored in one section of that name. Thus each ELF section contains | |
1014 | several "virtual" sections. */ | |
1015 | ||
1016 | struct virtual_v2_dwo_sections | |
1017 | { | |
1018 | bfd_size_type abbrev_offset; | |
1019 | bfd_size_type abbrev_size; | |
1020 | ||
1021 | bfd_size_type line_offset; | |
1022 | bfd_size_type line_size; | |
1023 | ||
1024 | bfd_size_type loc_offset; | |
1025 | bfd_size_type loc_size; | |
1026 | ||
1027 | bfd_size_type macinfo_offset; | |
1028 | bfd_size_type macinfo_size; | |
1029 | ||
1030 | bfd_size_type macro_offset; | |
1031 | bfd_size_type macro_size; | |
1032 | ||
1033 | bfd_size_type str_offsets_offset; | |
1034 | bfd_size_type str_offsets_size; | |
1035 | ||
1036 | /* Each DWP hash table entry records one CU or one TU. | |
1037 | That is recorded here, and copied to dwo_unit.section. */ | |
1038 | bfd_size_type info_or_types_offset; | |
1039 | bfd_size_type info_or_types_size; | |
1040 | }; | |
1041 | ||
80626a55 DE |
1042 | /* Contents of DWP hash tables. */ |
1043 | ||
1044 | struct dwp_hash_table | |
1045 | { | |
73869dc2 | 1046 | uint32_t version, nr_columns; |
80626a55 | 1047 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
1048 | const gdb_byte *hash_table, *unit_table; |
1049 | union | |
1050 | { | |
1051 | struct | |
1052 | { | |
1053 | const gdb_byte *indices; | |
1054 | } v1; | |
1055 | struct | |
1056 | { | |
1057 | /* This is indexed by column number and gives the id of the section | |
1058 | in that column. */ | |
1059 | #define MAX_NR_V2_DWO_SECTIONS \ | |
1060 | (1 /* .debug_info or .debug_types */ \ | |
1061 | + 1 /* .debug_abbrev */ \ | |
1062 | + 1 /* .debug_line */ \ | |
1063 | + 1 /* .debug_loc */ \ | |
1064 | + 1 /* .debug_str_offsets */ \ | |
1065 | + 1 /* .debug_macro or .debug_macinfo */) | |
1066 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
1067 | const gdb_byte *offsets; | |
1068 | const gdb_byte *sizes; | |
1069 | } v2; | |
1070 | } section_pool; | |
80626a55 DE |
1071 | }; |
1072 | ||
1073 | /* Data for one DWP file. */ | |
1074 | ||
1075 | struct dwp_file | |
1076 | { | |
1077 | /* Name of the file. */ | |
1078 | const char *name; | |
1079 | ||
73869dc2 DE |
1080 | /* File format version. */ |
1081 | int version; | |
1082 | ||
93417882 | 1083 | /* The bfd. */ |
80626a55 DE |
1084 | bfd *dbfd; |
1085 | ||
1086 | /* Section info for this file. */ | |
1087 | struct dwp_sections sections; | |
1088 | ||
57d63ce2 | 1089 | /* Table of CUs in the file. */ |
80626a55 DE |
1090 | const struct dwp_hash_table *cus; |
1091 | ||
1092 | /* Table of TUs in the file. */ | |
1093 | const struct dwp_hash_table *tus; | |
1094 | ||
19ac8c2e DE |
1095 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1096 | htab_t loaded_cus; | |
1097 | htab_t loaded_tus; | |
80626a55 | 1098 | |
73869dc2 DE |
1099 | /* Table to map ELF section numbers to their sections. |
1100 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1101 | unsigned int num_sections; |
1102 | asection **elf_sections; | |
1103 | }; | |
1104 | ||
36586728 TT |
1105 | /* This represents a '.dwz' file. */ |
1106 | ||
1107 | struct dwz_file | |
1108 | { | |
1109 | /* A dwz file can only contain a few sections. */ | |
1110 | struct dwarf2_section_info abbrev; | |
1111 | struct dwarf2_section_info info; | |
1112 | struct dwarf2_section_info str; | |
1113 | struct dwarf2_section_info line; | |
1114 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1115 | struct dwarf2_section_info gdb_index; |
36586728 TT |
1116 | |
1117 | /* The dwz's BFD. */ | |
1118 | bfd *dwz_bfd; | |
1119 | }; | |
1120 | ||
0963b4bd MS |
1121 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1122 | al. which are used for both .debug_info and .debug_types dies. | |
1123 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1124 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1125 | |
1126 | struct die_reader_specs | |
1127 | { | |
a32a8923 | 1128 | /* The bfd of die_section. */ |
93311388 DE |
1129 | bfd* abfd; |
1130 | ||
1131 | /* The CU of the DIE we are parsing. */ | |
1132 | struct dwarf2_cu *cu; | |
1133 | ||
80626a55 | 1134 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1135 | struct dwo_file *dwo_file; |
1136 | ||
dee91e82 | 1137 | /* The section the die comes from. |
3019eac3 | 1138 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1139 | struct dwarf2_section_info *die_section; |
1140 | ||
1141 | /* die_section->buffer. */ | |
d521ce57 | 1142 | const gdb_byte *buffer; |
f664829e DE |
1143 | |
1144 | /* The end of the buffer. */ | |
1145 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1146 | |
1147 | /* The value of the DW_AT_comp_dir attribute. */ | |
1148 | const char *comp_dir; | |
93311388 DE |
1149 | }; |
1150 | ||
fd820528 | 1151 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1152 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1153 | const gdb_byte *info_ptr, |
dee91e82 DE |
1154 | struct die_info *comp_unit_die, |
1155 | int has_children, | |
1156 | void *data); | |
1157 | ||
ecfb656c PA |
1158 | /* A 1-based directory index. This is a strong typedef to prevent |
1159 | accidentally using a directory index as a 0-based index into an | |
1160 | array/vector. */ | |
1161 | enum class dir_index : unsigned int {}; | |
1162 | ||
1163 | /* Likewise, a 1-based file name index. */ | |
1164 | enum class file_name_index : unsigned int {}; | |
1165 | ||
52059ffd TT |
1166 | struct file_entry |
1167 | { | |
fff8551c PA |
1168 | file_entry () = default; |
1169 | ||
ecfb656c | 1170 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1171 | unsigned int mod_time_, unsigned int length_) |
1172 | : name (name_), | |
ecfb656c | 1173 | d_index (d_index_), |
fff8551c PA |
1174 | mod_time (mod_time_), |
1175 | length (length_) | |
1176 | {} | |
1177 | ||
ecfb656c PA |
1178 | /* Return the include directory at D_INDEX stored in LH. Returns |
1179 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1180 | const char *include_dir (const line_header *lh) const; |
1181 | ||
fff8551c PA |
1182 | /* The file name. Note this is an observing pointer. The memory is |
1183 | owned by debug_line_buffer. */ | |
1184 | const char *name {}; | |
1185 | ||
8c43009f | 1186 | /* The directory index (1-based). */ |
ecfb656c | 1187 | dir_index d_index {}; |
fff8551c PA |
1188 | |
1189 | unsigned int mod_time {}; | |
1190 | ||
1191 | unsigned int length {}; | |
1192 | ||
1193 | /* True if referenced by the Line Number Program. */ | |
1194 | bool included_p {}; | |
1195 | ||
83769d0b | 1196 | /* The associated symbol table, if any. */ |
fff8551c | 1197 | struct symtab *symtab {}; |
52059ffd TT |
1198 | }; |
1199 | ||
debd256d JB |
1200 | /* The line number information for a compilation unit (found in the |
1201 | .debug_line section) begins with a "statement program header", | |
1202 | which contains the following information. */ | |
1203 | struct line_header | |
1204 | { | |
fff8551c PA |
1205 | line_header () |
1206 | : offset_in_dwz {} | |
1207 | {} | |
1208 | ||
1209 | /* Add an entry to the include directory table. */ | |
1210 | void add_include_dir (const char *include_dir); | |
1211 | ||
1212 | /* Add an entry to the file name table. */ | |
ecfb656c | 1213 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1214 | unsigned int mod_time, unsigned int length); |
1215 | ||
ecfb656c | 1216 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1217 | is out of bounds. */ |
ecfb656c | 1218 | const char *include_dir_at (dir_index index) const |
8c43009f | 1219 | { |
ecfb656c PA |
1220 | /* Convert directory index number (1-based) to vector index |
1221 | (0-based). */ | |
1222 | size_t vec_index = to_underlying (index) - 1; | |
1223 | ||
1224 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1225 | return NULL; |
ecfb656c | 1226 | return include_dirs[vec_index]; |
8c43009f PA |
1227 | } |
1228 | ||
ecfb656c | 1229 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1230 | is out of bounds. */ |
ecfb656c | 1231 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1232 | { |
ecfb656c PA |
1233 | /* Convert file name index number (1-based) to vector index |
1234 | (0-based). */ | |
1235 | size_t vec_index = to_underlying (index) - 1; | |
1236 | ||
1237 | if (vec_index >= file_names.size ()) | |
fff8551c | 1238 | return NULL; |
ecfb656c | 1239 | return &file_names[vec_index]; |
fff8551c PA |
1240 | } |
1241 | ||
1242 | /* Const version of the above. */ | |
1243 | const file_entry *file_name_at (unsigned int index) const | |
1244 | { | |
1245 | if (index >= file_names.size ()) | |
8c43009f PA |
1246 | return NULL; |
1247 | return &file_names[index]; | |
1248 | } | |
1249 | ||
527f3840 | 1250 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1251 | sect_offset sect_off {}; |
527f3840 JK |
1252 | |
1253 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1254 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1255 | ||
1256 | unsigned int total_length {}; | |
1257 | unsigned short version {}; | |
1258 | unsigned int header_length {}; | |
1259 | unsigned char minimum_instruction_length {}; | |
1260 | unsigned char maximum_ops_per_instruction {}; | |
1261 | unsigned char default_is_stmt {}; | |
1262 | int line_base {}; | |
1263 | unsigned char line_range {}; | |
1264 | unsigned char opcode_base {}; | |
debd256d JB |
1265 | |
1266 | /* standard_opcode_lengths[i] is the number of operands for the | |
1267 | standard opcode whose value is i. This means that | |
1268 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1269 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1270 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1271 | |
fff8551c PA |
1272 | /* The include_directories table. Note these are observing |
1273 | pointers. The memory is owned by debug_line_buffer. */ | |
1274 | std::vector<const char *> include_dirs; | |
debd256d | 1275 | |
fff8551c PA |
1276 | /* The file_names table. */ |
1277 | std::vector<file_entry> file_names; | |
debd256d JB |
1278 | |
1279 | /* The start and end of the statement program following this | |
6502dd73 | 1280 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1281 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1282 | }; |
c906108c | 1283 | |
fff8551c PA |
1284 | typedef std::unique_ptr<line_header> line_header_up; |
1285 | ||
8c43009f PA |
1286 | const char * |
1287 | file_entry::include_dir (const line_header *lh) const | |
1288 | { | |
ecfb656c | 1289 | return lh->include_dir_at (d_index); |
8c43009f PA |
1290 | } |
1291 | ||
c906108c | 1292 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1293 | need this much information. */ |
c906108c SS |
1294 | struct partial_die_info |
1295 | { | |
72bf9492 | 1296 | /* Offset of this DIE. */ |
9c541725 | 1297 | sect_offset sect_off; |
72bf9492 DJ |
1298 | |
1299 | /* DWARF-2 tag for this DIE. */ | |
1300 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1301 | ||
72bf9492 DJ |
1302 | /* Assorted flags describing the data found in this DIE. */ |
1303 | unsigned int has_children : 1; | |
1304 | unsigned int is_external : 1; | |
1305 | unsigned int is_declaration : 1; | |
1306 | unsigned int has_type : 1; | |
1307 | unsigned int has_specification : 1; | |
1308 | unsigned int has_pc_info : 1; | |
481860b3 | 1309 | unsigned int may_be_inlined : 1; |
72bf9492 | 1310 | |
0c1b455e TT |
1311 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1312 | unsigned int main_subprogram : 1; | |
1313 | ||
72bf9492 DJ |
1314 | /* Flag set if the SCOPE field of this structure has been |
1315 | computed. */ | |
1316 | unsigned int scope_set : 1; | |
1317 | ||
fa4028e9 JB |
1318 | /* Flag set if the DIE has a byte_size attribute. */ |
1319 | unsigned int has_byte_size : 1; | |
1320 | ||
ff908ebf AW |
1321 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1322 | unsigned int has_const_value : 1; | |
1323 | ||
98bfdba5 PA |
1324 | /* Flag set if any of the DIE's children are template arguments. */ |
1325 | unsigned int has_template_arguments : 1; | |
1326 | ||
abc72ce4 DE |
1327 | /* Flag set if fixup_partial_die has been called on this die. */ |
1328 | unsigned int fixup_called : 1; | |
1329 | ||
36586728 TT |
1330 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1331 | unsigned int is_dwz : 1; | |
1332 | ||
1333 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1334 | unsigned int spec_is_dwz : 1; | |
1335 | ||
72bf9492 | 1336 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1337 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1338 | const char *name; |
72bf9492 | 1339 | |
abc72ce4 DE |
1340 | /* The linkage name, if present. */ |
1341 | const char *linkage_name; | |
1342 | ||
72bf9492 DJ |
1343 | /* The scope to prepend to our children. This is generally |
1344 | allocated on the comp_unit_obstack, so will disappear | |
1345 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1346 | const char *scope; |
72bf9492 | 1347 | |
95554aad TT |
1348 | /* Some data associated with the partial DIE. The tag determines |
1349 | which field is live. */ | |
1350 | union | |
1351 | { | |
1352 | /* The location description associated with this DIE, if any. */ | |
1353 | struct dwarf_block *locdesc; | |
1354 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1355 | sect_offset sect_off; |
95554aad | 1356 | } d; |
72bf9492 DJ |
1357 | |
1358 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1359 | CORE_ADDR lowpc; |
1360 | CORE_ADDR highpc; | |
72bf9492 | 1361 | |
93311388 | 1362 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1363 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1364 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1365 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1366 | const gdb_byte *sibling; |
72bf9492 DJ |
1367 | |
1368 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1369 | DW_AT_specification (or DW_AT_abstract_origin or | |
1370 | DW_AT_extension). */ | |
b64f50a1 | 1371 | sect_offset spec_offset; |
72bf9492 DJ |
1372 | |
1373 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1374 | if any. */ | |
1375 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1376 | }; |
1377 | ||
0963b4bd | 1378 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1379 | struct abbrev_info |
1380 | { | |
1381 | unsigned int number; /* number identifying abbrev */ | |
1382 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1383 | unsigned short has_children; /* boolean */ |
1384 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1385 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1386 | struct abbrev_info *next; /* next in chain */ | |
1387 | }; | |
1388 | ||
1389 | struct attr_abbrev | |
1390 | { | |
9d25dd43 DE |
1391 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1392 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1393 | |
1394 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1395 | LONGEST implicit_const; | |
c906108c SS |
1396 | }; |
1397 | ||
433df2d4 DE |
1398 | /* Size of abbrev_table.abbrev_hash_table. */ |
1399 | #define ABBREV_HASH_SIZE 121 | |
1400 | ||
1401 | /* Top level data structure to contain an abbreviation table. */ | |
1402 | ||
1403 | struct abbrev_table | |
1404 | { | |
f4dc4d17 DE |
1405 | /* Where the abbrev table came from. |
1406 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1407 | sect_offset sect_off; |
433df2d4 DE |
1408 | |
1409 | /* Storage for the abbrev table. */ | |
1410 | struct obstack abbrev_obstack; | |
1411 | ||
1412 | /* Hash table of abbrevs. | |
1413 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1414 | It could be statically allocated, but the previous code didn't so we | |
1415 | don't either. */ | |
1416 | struct abbrev_info **abbrevs; | |
1417 | }; | |
1418 | ||
0963b4bd | 1419 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1420 | struct attribute |
1421 | { | |
9d25dd43 | 1422 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1423 | ENUM_BITFIELD(dwarf_form) form : 15; |
1424 | ||
1425 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1426 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1427 | here for better struct attribute alignment. */ | |
1428 | unsigned int string_is_canonical : 1; | |
1429 | ||
b60c80d6 DJ |
1430 | union |
1431 | { | |
15d034d0 | 1432 | const char *str; |
b60c80d6 | 1433 | struct dwarf_block *blk; |
43bbcdc2 PH |
1434 | ULONGEST unsnd; |
1435 | LONGEST snd; | |
b60c80d6 | 1436 | CORE_ADDR addr; |
ac9ec31b | 1437 | ULONGEST signature; |
b60c80d6 DJ |
1438 | } |
1439 | u; | |
1440 | }; | |
1441 | ||
0963b4bd | 1442 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1443 | struct die_info |
1444 | { | |
76815b17 DE |
1445 | /* DWARF-2 tag for this DIE. */ |
1446 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1447 | ||
1448 | /* Number of attributes */ | |
98bfdba5 PA |
1449 | unsigned char num_attrs; |
1450 | ||
1451 | /* True if we're presently building the full type name for the | |
1452 | type derived from this DIE. */ | |
1453 | unsigned char building_fullname : 1; | |
76815b17 | 1454 | |
adde2bff DE |
1455 | /* True if this die is in process. PR 16581. */ |
1456 | unsigned char in_process : 1; | |
1457 | ||
76815b17 DE |
1458 | /* Abbrev number */ |
1459 | unsigned int abbrev; | |
1460 | ||
93311388 | 1461 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1462 | sect_offset sect_off; |
78ba4af6 JB |
1463 | |
1464 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1465 | points to this die's parent; CHILD points to the first child of | |
1466 | this node; and all the children of a given node are chained | |
4950bc1c | 1467 | together via their SIBLING fields. */ |
639d11d3 DC |
1468 | struct die_info *child; /* Its first child, if any. */ |
1469 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1470 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1471 | |
b60c80d6 DJ |
1472 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1473 | zero, but it's not common and zero-sized arrays are not | |
1474 | sufficiently portable C. */ | |
1475 | struct attribute attrs[1]; | |
c906108c SS |
1476 | }; |
1477 | ||
0963b4bd | 1478 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1479 | |
1480 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1481 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1482 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1483 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1484 | #define DW_SND(attr) ((attr)->u.snd) | |
1485 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1486 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1487 | |
0963b4bd | 1488 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1489 | struct dwarf_block |
1490 | { | |
56eb65bd | 1491 | size_t size; |
1d6edc3c JK |
1492 | |
1493 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1494 | const gdb_byte *data; |
c906108c SS |
1495 | }; |
1496 | ||
c906108c SS |
1497 | #ifndef ATTR_ALLOC_CHUNK |
1498 | #define ATTR_ALLOC_CHUNK 4 | |
1499 | #endif | |
1500 | ||
c906108c SS |
1501 | /* Allocate fields for structs, unions and enums in this size. */ |
1502 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1503 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1504 | #endif | |
1505 | ||
c906108c SS |
1506 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1507 | but this would require a corresponding change in unpack_field_as_long | |
1508 | and friends. */ | |
1509 | static int bits_per_byte = 8; | |
1510 | ||
52059ffd TT |
1511 | struct nextfield |
1512 | { | |
1513 | struct nextfield *next; | |
1514 | int accessibility; | |
1515 | int virtuality; | |
1516 | struct field field; | |
1517 | }; | |
1518 | ||
1519 | struct nextfnfield | |
1520 | { | |
1521 | struct nextfnfield *next; | |
1522 | struct fn_field fnfield; | |
1523 | }; | |
1524 | ||
1525 | struct fnfieldlist | |
1526 | { | |
1527 | const char *name; | |
1528 | int length; | |
1529 | struct nextfnfield *head; | |
1530 | }; | |
1531 | ||
1532 | struct typedef_field_list | |
1533 | { | |
1534 | struct typedef_field field; | |
1535 | struct typedef_field_list *next; | |
1536 | }; | |
1537 | ||
c906108c SS |
1538 | /* The routines that read and process dies for a C struct or C++ class |
1539 | pass lists of data member fields and lists of member function fields | |
1540 | in an instance of a field_info structure, as defined below. */ | |
1541 | struct field_info | |
c5aa993b | 1542 | { |
0963b4bd | 1543 | /* List of data member and baseclasses fields. */ |
52059ffd | 1544 | struct nextfield *fields, *baseclasses; |
c906108c | 1545 | |
7d0ccb61 | 1546 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1547 | int nfields; |
c906108c | 1548 | |
c5aa993b JM |
1549 | /* Number of baseclasses. */ |
1550 | int nbaseclasses; | |
c906108c | 1551 | |
c5aa993b JM |
1552 | /* Set if the accesibility of one of the fields is not public. */ |
1553 | int non_public_fields; | |
c906108c | 1554 | |
c5aa993b JM |
1555 | /* Member function fieldlist array, contains name of possibly overloaded |
1556 | member function, number of overloaded member functions and a pointer | |
1557 | to the head of the member function field chain. */ | |
52059ffd | 1558 | struct fnfieldlist *fnfieldlists; |
c906108c | 1559 | |
c5aa993b JM |
1560 | /* Number of entries in the fnfieldlists array. */ |
1561 | int nfnfields; | |
98751a41 JK |
1562 | |
1563 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1564 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1565 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1566 | unsigned typedef_field_list_count; |
c5aa993b | 1567 | }; |
c906108c | 1568 | |
10b3939b DJ |
1569 | /* One item on the queue of compilation units to read in full symbols |
1570 | for. */ | |
1571 | struct dwarf2_queue_item | |
1572 | { | |
1573 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1574 | enum language pretend_language; |
10b3939b DJ |
1575 | struct dwarf2_queue_item *next; |
1576 | }; | |
1577 | ||
1578 | /* The current queue. */ | |
1579 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1580 | ||
ae038cb0 DJ |
1581 | /* Loaded secondary compilation units are kept in memory until they |
1582 | have not been referenced for the processing of this many | |
1583 | compilation units. Set this to zero to disable caching. Cache | |
1584 | sizes of up to at least twenty will improve startup time for | |
1585 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1586 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1587 | static void |
b4f54984 DE |
1588 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1589 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1590 | { |
3e43a32a | 1591 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1592 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1593 | value); |
1594 | } | |
4390d890 | 1595 | \f |
c906108c SS |
1596 | /* local function prototypes */ |
1597 | ||
a32a8923 DE |
1598 | static const char *get_section_name (const struct dwarf2_section_info *); |
1599 | ||
1600 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1601 | ||
918dd910 JK |
1602 | static void dwarf2_find_base_address (struct die_info *die, |
1603 | struct dwarf2_cu *cu); | |
1604 | ||
0018ea6f DE |
1605 | static struct partial_symtab *create_partial_symtab |
1606 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1607 | ||
f1902523 JK |
1608 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1609 | const gdb_byte *info_ptr, | |
1610 | struct die_info *type_unit_die, | |
1611 | int has_children, void *data); | |
1612 | ||
c67a9c90 | 1613 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1614 | |
72bf9492 DJ |
1615 | static void scan_partial_symbols (struct partial_die_info *, |
1616 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1617 | int, struct dwarf2_cu *); |
c906108c | 1618 | |
72bf9492 DJ |
1619 | static void add_partial_symbol (struct partial_die_info *, |
1620 | struct dwarf2_cu *); | |
63d06c5c | 1621 | |
72bf9492 DJ |
1622 | static void add_partial_namespace (struct partial_die_info *pdi, |
1623 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1624 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1625 | |
5d7cb8df | 1626 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1627 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1628 | struct dwarf2_cu *cu); |
1629 | ||
72bf9492 DJ |
1630 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1631 | struct dwarf2_cu *cu); | |
91c24f0a | 1632 | |
bc30ff58 JB |
1633 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1634 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1635 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1636 | |
257e7a09 YQ |
1637 | static void dwarf2_read_symtab (struct partial_symtab *, |
1638 | struct objfile *); | |
c906108c | 1639 | |
a14ed312 | 1640 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1641 | |
433df2d4 DE |
1642 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1643 | (const struct abbrev_table *, unsigned int); | |
1644 | ||
1645 | static struct abbrev_table *abbrev_table_read_table | |
1646 | (struct dwarf2_section_info *, sect_offset); | |
1647 | ||
1648 | static void abbrev_table_free (struct abbrev_table *); | |
1649 | ||
f4dc4d17 DE |
1650 | static void abbrev_table_free_cleanup (void *); |
1651 | ||
dee91e82 DE |
1652 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1653 | struct dwarf2_section_info *); | |
c906108c | 1654 | |
f3dd6933 | 1655 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1656 | |
d521ce57 | 1657 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1658 | |
dee91e82 | 1659 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1660 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1661 | |
d521ce57 TT |
1662 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1663 | struct partial_die_info *, | |
1664 | struct abbrev_info *, | |
1665 | unsigned int, | |
1666 | const gdb_byte *); | |
c906108c | 1667 | |
36586728 | 1668 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1669 | struct dwarf2_cu *); |
72bf9492 DJ |
1670 | |
1671 | static void fixup_partial_die (struct partial_die_info *, | |
1672 | struct dwarf2_cu *); | |
1673 | ||
d521ce57 TT |
1674 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1675 | struct attribute *, struct attr_abbrev *, | |
1676 | const gdb_byte *); | |
a8329558 | 1677 | |
a1855c1d | 1678 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1679 | |
a1855c1d | 1680 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1681 | |
a1855c1d | 1682 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1683 | |
a1855c1d | 1684 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1685 | |
a1855c1d | 1686 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1687 | |
d521ce57 | 1688 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1689 | unsigned int *); |
c906108c | 1690 | |
d521ce57 | 1691 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1692 | |
1693 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1694 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1695 | unsigned int *, unsigned int *); |
613e1657 | 1696 | |
d521ce57 TT |
1697 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1698 | const struct comp_unit_head *, | |
c764a876 DE |
1699 | unsigned int *); |
1700 | ||
d521ce57 | 1701 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1702 | |
f4dc4d17 DE |
1703 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1704 | sect_offset); | |
1705 | ||
d521ce57 | 1706 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1707 | |
d521ce57 | 1708 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1709 | |
d521ce57 TT |
1710 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1711 | const struct comp_unit_head *, | |
1712 | unsigned int *); | |
4bdf3d34 | 1713 | |
43988095 JK |
1714 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1715 | const struct comp_unit_head *, | |
1716 | unsigned int *); | |
36586728 | 1717 | |
43988095 | 1718 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1719 | |
d521ce57 | 1720 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1721 | |
d521ce57 TT |
1722 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1723 | const gdb_byte *, | |
3019eac3 DE |
1724 | unsigned int *); |
1725 | ||
d521ce57 | 1726 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1727 | ULONGEST str_index); |
3019eac3 | 1728 | |
e142c38c | 1729 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1730 | |
e142c38c DJ |
1731 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1732 | struct dwarf2_cu *); | |
c906108c | 1733 | |
348e048f | 1734 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1735 | unsigned int); |
348e048f | 1736 | |
7d45c7c3 KB |
1737 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1738 | struct dwarf2_cu *cu); | |
1739 | ||
05cf31d1 JB |
1740 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1741 | struct dwarf2_cu *cu); | |
1742 | ||
e142c38c | 1743 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1744 | |
e142c38c | 1745 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1746 | struct dwarf2_cu **); |
63d06c5c | 1747 | |
9c541725 | 1748 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1749 | struct dwarf2_cu *cu); |
debd256d | 1750 | |
f3f5162e | 1751 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1752 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1753 | CORE_ADDR, int decode_mapping); |
c906108c | 1754 | |
4d663531 | 1755 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1756 | |
43f3e411 DE |
1757 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1758 | const char *, const char *, | |
1759 | CORE_ADDR); | |
f4dc4d17 | 1760 | |
a14ed312 | 1761 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1762 | struct dwarf2_cu *); |
c906108c | 1763 | |
34eaf542 TT |
1764 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1765 | struct dwarf2_cu *, struct symbol *); | |
1766 | ||
ff39bb5e | 1767 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1768 | struct dwarf2_cu *); |
c906108c | 1769 | |
ff39bb5e | 1770 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1771 | struct type *type, |
1772 | const char *name, | |
1773 | struct obstack *obstack, | |
12df843f | 1774 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1775 | const gdb_byte **bytes, |
98bfdba5 | 1776 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1777 | |
e7c27a73 | 1778 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1779 | |
b4ba55a1 JB |
1780 | static int need_gnat_info (struct dwarf2_cu *); |
1781 | ||
3e43a32a MS |
1782 | static struct type *die_descriptive_type (struct die_info *, |
1783 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1784 | |
1785 | static void set_descriptive_type (struct type *, struct die_info *, | |
1786 | struct dwarf2_cu *); | |
1787 | ||
e7c27a73 DJ |
1788 | static struct type *die_containing_type (struct die_info *, |
1789 | struct dwarf2_cu *); | |
c906108c | 1790 | |
ff39bb5e | 1791 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1792 | struct dwarf2_cu *); |
c906108c | 1793 | |
f792889a | 1794 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1795 | |
673bfd45 DE |
1796 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1797 | ||
0d5cff50 | 1798 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1799 | |
6e70227d | 1800 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1801 | const char *suffix, int physname, |
1802 | struct dwarf2_cu *cu); | |
63d06c5c | 1803 | |
e7c27a73 | 1804 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1805 | |
348e048f DE |
1806 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1807 | ||
e7c27a73 | 1808 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1809 | |
e7c27a73 | 1810 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1811 | |
96408a79 SA |
1812 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1813 | ||
71a3c369 TT |
1814 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1815 | ||
ff013f42 JK |
1816 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1817 | struct dwarf2_cu *, struct partial_symtab *); | |
1818 | ||
3a2b436a | 1819 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1820 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1821 | enum pc_bounds_kind |
1822 | { | |
e385593e | 1823 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1824 | PC_BOUNDS_NOT_PRESENT, |
1825 | ||
e385593e JK |
1826 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1827 | were present but they do not form a valid range of PC addresses. */ | |
1828 | PC_BOUNDS_INVALID, | |
1829 | ||
3a2b436a JK |
1830 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1831 | PC_BOUNDS_RANGES, | |
1832 | ||
1833 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1834 | PC_BOUNDS_HIGH_LOW, | |
1835 | }; | |
1836 | ||
1837 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1838 | CORE_ADDR *, CORE_ADDR *, | |
1839 | struct dwarf2_cu *, | |
1840 | struct partial_symtab *); | |
c906108c | 1841 | |
fae299cd DC |
1842 | static void get_scope_pc_bounds (struct die_info *, |
1843 | CORE_ADDR *, CORE_ADDR *, | |
1844 | struct dwarf2_cu *); | |
1845 | ||
801e3a5b JB |
1846 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1847 | CORE_ADDR, struct dwarf2_cu *); | |
1848 | ||
a14ed312 | 1849 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1850 | struct dwarf2_cu *); |
c906108c | 1851 | |
a14ed312 | 1852 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1853 | struct type *, struct dwarf2_cu *); |
c906108c | 1854 | |
a14ed312 | 1855 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1856 | struct die_info *, struct type *, |
e7c27a73 | 1857 | struct dwarf2_cu *); |
c906108c | 1858 | |
a14ed312 | 1859 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1860 | struct type *, |
1861 | struct dwarf2_cu *); | |
c906108c | 1862 | |
134d01f1 | 1863 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1864 | |
e7c27a73 | 1865 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1866 | |
e7c27a73 | 1867 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1868 | |
5d7cb8df JK |
1869 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1870 | ||
22cee43f PMR |
1871 | static struct using_direct **using_directives (enum language); |
1872 | ||
27aa8d6a SW |
1873 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1874 | ||
74921315 KS |
1875 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1876 | ||
f55ee35c JK |
1877 | static struct type *read_module_type (struct die_info *die, |
1878 | struct dwarf2_cu *cu); | |
1879 | ||
38d518c9 | 1880 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1881 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1882 | |
134d01f1 | 1883 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1884 | |
e7c27a73 | 1885 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1886 | |
6e70227d | 1887 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1888 | struct dwarf2_cu *); |
1889 | ||
bf6af496 | 1890 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1891 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1892 | struct die_info *); |
639d11d3 | 1893 | |
dee91e82 | 1894 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1895 | const gdb_byte *info_ptr, |
1896 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1897 | struct die_info *parent); |
1898 | ||
d521ce57 TT |
1899 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1900 | struct die_info **, const gdb_byte *, | |
1901 | int *, int); | |
3019eac3 | 1902 | |
d521ce57 TT |
1903 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1904 | struct die_info **, const gdb_byte *, | |
1905 | int *); | |
93311388 | 1906 | |
e7c27a73 | 1907 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1908 | |
15d034d0 TT |
1909 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1910 | struct obstack *); | |
71c25dea | 1911 | |
15d034d0 | 1912 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1913 | |
15d034d0 | 1914 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1915 | struct die_info *die, |
1916 | struct dwarf2_cu *cu); | |
1917 | ||
ca69b9e6 DE |
1918 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1919 | struct dwarf2_cu *cu); | |
1920 | ||
e142c38c | 1921 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1922 | struct dwarf2_cu **); |
9219021c | 1923 | |
f39c6ffd | 1924 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1925 | |
f39c6ffd | 1926 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1927 | |
f39c6ffd | 1928 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1929 | |
a121b7c1 | 1930 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1931 | |
f39c6ffd | 1932 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1933 | |
f9aca02d | 1934 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1935 | |
d97bc12b DE |
1936 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1937 | ||
1938 | static void dump_die_for_error (struct die_info *); | |
1939 | ||
1940 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1941 | struct die_info *); | |
c906108c | 1942 | |
d97bc12b | 1943 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1944 | |
51545339 | 1945 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1946 | struct dwarf2_cu *); |
c906108c | 1947 | |
ff39bb5e | 1948 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1949 | |
ff39bb5e | 1950 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1951 | |
348e048f | 1952 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1953 | const struct attribute *, |
348e048f DE |
1954 | struct dwarf2_cu **); |
1955 | ||
10b3939b | 1956 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1957 | const struct attribute *, |
f2f0e013 | 1958 | struct dwarf2_cu **); |
c906108c | 1959 | |
348e048f | 1960 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1961 | const struct attribute *, |
348e048f DE |
1962 | struct dwarf2_cu **); |
1963 | ||
ac9ec31b DE |
1964 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1965 | struct dwarf2_cu *); | |
1966 | ||
1967 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1968 | const struct attribute *, |
ac9ec31b DE |
1969 | struct dwarf2_cu *); |
1970 | ||
e5fe5e75 | 1971 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1972 | |
52dc124a | 1973 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1974 | |
63e43d3a PMR |
1975 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1976 | struct die_info *die, struct dwarf2_cu *cu, | |
1977 | struct dynamic_prop *prop); | |
1978 | ||
c906108c SS |
1979 | /* memory allocation interface */ |
1980 | ||
7b5a2f43 | 1981 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1982 | |
b60c80d6 | 1983 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1984 | |
43f3e411 | 1985 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1986 | |
6e5a29e1 | 1987 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1988 | |
6e5a29e1 | 1989 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1990 | |
6e5a29e1 | 1991 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1992 | |
6e5a29e1 | 1993 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1994 | |
8cf6f0b1 TT |
1995 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1996 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1997 | const struct attribute *attr); |
8cf6f0b1 | 1998 | |
ff39bb5e | 1999 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 2000 | struct symbol *sym, |
f1e6e072 TT |
2001 | struct dwarf2_cu *cu, |
2002 | int is_block); | |
4c2df51b | 2003 | |
d521ce57 TT |
2004 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
2005 | const gdb_byte *info_ptr, | |
2006 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 2007 | |
72bf9492 DJ |
2008 | static void free_stack_comp_unit (void *); |
2009 | ||
72bf9492 DJ |
2010 | static hashval_t partial_die_hash (const void *item); |
2011 | ||
2012 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
2013 | ||
ae038cb0 | 2014 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 2015 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 2016 | |
9816fde3 | 2017 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 2018 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
2019 | |
2020 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
2021 | struct die_info *comp_unit_die, |
2022 | enum language pretend_language); | |
93311388 | 2023 | |
68dc6402 | 2024 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
2025 | |
2026 | static void free_cached_comp_units (void *); | |
2027 | ||
2028 | static void age_cached_comp_units (void); | |
2029 | ||
dee91e82 | 2030 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 2031 | |
f792889a DJ |
2032 | static struct type *set_die_type (struct die_info *, struct type *, |
2033 | struct dwarf2_cu *); | |
1c379e20 | 2034 | |
ae038cb0 DJ |
2035 | static void create_all_comp_units (struct objfile *); |
2036 | ||
0e50663e | 2037 | static int create_all_type_units (struct objfile *); |
1fd400ff | 2038 | |
95554aad TT |
2039 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
2040 | enum language); | |
10b3939b | 2041 | |
95554aad TT |
2042 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
2043 | enum language); | |
10b3939b | 2044 | |
f4dc4d17 DE |
2045 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
2046 | enum language); | |
2047 | ||
10b3939b DJ |
2048 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
2049 | struct dwarf2_per_cu_data *); | |
2050 | ||
ae038cb0 DJ |
2051 | static void dwarf2_mark (struct dwarf2_cu *); |
2052 | ||
2053 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
2054 | ||
b64f50a1 | 2055 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 2056 | struct dwarf2_per_cu_data *); |
673bfd45 | 2057 | |
f792889a | 2058 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 2059 | |
9291a0cd TT |
2060 | static void dwarf2_release_queue (void *dummy); |
2061 | ||
95554aad TT |
2062 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
2063 | enum language pretend_language); | |
2064 | ||
a0f42c21 | 2065 | static void process_queue (void); |
9291a0cd | 2066 | |
d721ba37 PA |
2067 | /* The return type of find_file_and_directory. Note, the enclosed |
2068 | string pointers are only valid while this object is valid. */ | |
2069 | ||
2070 | struct file_and_directory | |
2071 | { | |
2072 | /* The filename. This is never NULL. */ | |
2073 | const char *name; | |
2074 | ||
2075 | /* The compilation directory. NULL if not known. If we needed to | |
2076 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2077 | points directly to the DW_AT_comp_dir string attribute owned by | |
2078 | the obstack that owns the DIE. */ | |
2079 | const char *comp_dir; | |
2080 | ||
2081 | /* If we needed to build a new string for comp_dir, this is what | |
2082 | owns the storage. */ | |
2083 | std::string comp_dir_storage; | |
2084 | }; | |
2085 | ||
2086 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2087 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2088 | |
2089 | static char *file_full_name (int file, struct line_header *lh, | |
2090 | const char *comp_dir); | |
2091 | ||
43988095 JK |
2092 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2093 | enum class rcuh_kind { COMPILE, TYPE }; | |
2094 | ||
d521ce57 | 2095 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2096 | (struct comp_unit_head *header, |
2097 | struct dwarf2_section_info *section, | |
d521ce57 | 2098 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2099 | rcuh_kind section_kind); |
36586728 | 2100 | |
fd820528 | 2101 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2102 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2103 | int use_existing_cu, int keep, | |
3019eac3 DE |
2104 | die_reader_func_ftype *die_reader_func, void *data); |
2105 | ||
dee91e82 DE |
2106 | static void init_cutu_and_read_dies_simple |
2107 | (struct dwarf2_per_cu_data *this_cu, | |
2108 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2109 | |
673bfd45 | 2110 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2111 | |
3019eac3 DE |
2112 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2113 | ||
57d63ce2 DE |
2114 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2115 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2116 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2117 | |
2118 | static struct dwp_file *get_dwp_file (void); | |
2119 | ||
3019eac3 | 2120 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2121 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2122 | |
2123 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2124 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2125 | |
89e63ee4 DE |
2126 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2127 | ||
3019eac3 DE |
2128 | static void free_dwo_file_cleanup (void *); |
2129 | ||
95554aad TT |
2130 | static void process_cu_includes (void); |
2131 | ||
1b80a9fa | 2132 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2133 | |
2134 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2135 | \f |
2136 | /* Various complaints about symbol reading that don't abort the process. */ | |
2137 | ||
2138 | static void | |
2139 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2140 | { | |
2141 | complaint (&symfile_complaints, | |
2142 | _("statement list doesn't fit in .debug_line section")); | |
2143 | } | |
2144 | ||
2145 | static void | |
2146 | dwarf2_debug_line_missing_file_complaint (void) | |
2147 | { | |
2148 | complaint (&symfile_complaints, | |
2149 | _(".debug_line section has line data without a file")); | |
2150 | } | |
2151 | ||
2152 | static void | |
2153 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2154 | { | |
2155 | complaint (&symfile_complaints, | |
2156 | _(".debug_line section has line " | |
2157 | "program sequence without an end")); | |
2158 | } | |
2159 | ||
2160 | static void | |
2161 | dwarf2_complex_location_expr_complaint (void) | |
2162 | { | |
2163 | complaint (&symfile_complaints, _("location expression too complex")); | |
2164 | } | |
2165 | ||
2166 | static void | |
2167 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2168 | int arg3) | |
2169 | { | |
2170 | complaint (&symfile_complaints, | |
2171 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2172 | arg1, arg2, arg3); | |
2173 | } | |
2174 | ||
2175 | static void | |
2176 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2177 | { | |
2178 | complaint (&symfile_complaints, | |
2179 | _("debug info runs off end of %s section" | |
2180 | " [in module %s]"), | |
a32a8923 DE |
2181 | get_section_name (section), |
2182 | get_section_file_name (section)); | |
4390d890 | 2183 | } |
1b80a9fa | 2184 | |
4390d890 DE |
2185 | static void |
2186 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2187 | { | |
2188 | complaint (&symfile_complaints, | |
2189 | _("macro debug info contains a " | |
2190 | "malformed macro definition:\n`%s'"), | |
2191 | arg1); | |
2192 | } | |
2193 | ||
2194 | static void | |
2195 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2196 | { | |
2197 | complaint (&symfile_complaints, | |
2198 | _("invalid attribute class or form for '%s' in '%s'"), | |
2199 | arg1, arg2); | |
2200 | } | |
527f3840 JK |
2201 | |
2202 | /* Hash function for line_header_hash. */ | |
2203 | ||
2204 | static hashval_t | |
2205 | line_header_hash (const struct line_header *ofs) | |
2206 | { | |
9c541725 | 2207 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2208 | } |
2209 | ||
2210 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2211 | ||
2212 | static hashval_t | |
2213 | line_header_hash_voidp (const void *item) | |
2214 | { | |
9a3c8263 | 2215 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2216 | |
2217 | return line_header_hash (ofs); | |
2218 | } | |
2219 | ||
2220 | /* Equality function for line_header_hash. */ | |
2221 | ||
2222 | static int | |
2223 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2224 | { | |
9a3c8263 SM |
2225 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2226 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2227 | |
9c541725 | 2228 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2229 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2230 | } | |
2231 | ||
4390d890 | 2232 | \f |
9291a0cd | 2233 | |
31aa7e4e JB |
2234 | /* Read the given attribute value as an address, taking the attribute's |
2235 | form into account. */ | |
2236 | ||
2237 | static CORE_ADDR | |
2238 | attr_value_as_address (struct attribute *attr) | |
2239 | { | |
2240 | CORE_ADDR addr; | |
2241 | ||
2242 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2243 | { | |
2244 | /* Aside from a few clearly defined exceptions, attributes that | |
2245 | contain an address must always be in DW_FORM_addr form. | |
2246 | Unfortunately, some compilers happen to be violating this | |
2247 | requirement by encoding addresses using other forms, such | |
2248 | as DW_FORM_data4 for example. For those broken compilers, | |
2249 | we try to do our best, without any guarantee of success, | |
2250 | to interpret the address correctly. It would also be nice | |
2251 | to generate a complaint, but that would require us to maintain | |
2252 | a list of legitimate cases where a non-address form is allowed, | |
2253 | as well as update callers to pass in at least the CU's DWARF | |
2254 | version. This is more overhead than what we're willing to | |
2255 | expand for a pretty rare case. */ | |
2256 | addr = DW_UNSND (attr); | |
2257 | } | |
2258 | else | |
2259 | addr = DW_ADDR (attr); | |
2260 | ||
2261 | return addr; | |
2262 | } | |
2263 | ||
9291a0cd TT |
2264 | /* The suffix for an index file. */ |
2265 | #define INDEX_SUFFIX ".gdb-index" | |
2266 | ||
330cdd98 PA |
2267 | /* See declaration. */ |
2268 | ||
2269 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2270 | const dwarf2_debug_sections *names) | |
2271 | : objfile (objfile_) | |
2272 | { | |
2273 | if (names == NULL) | |
2274 | names = &dwarf2_elf_names; | |
2275 | ||
2276 | bfd *obfd = objfile->obfd; | |
2277 | ||
2278 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2279 | locate_sections (obfd, sec, *names); | |
2280 | } | |
2281 | ||
2282 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2283 | { | |
2284 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2285 | free_cached_comp_units (); | |
2286 | ||
2287 | if (quick_file_names_table) | |
2288 | htab_delete (quick_file_names_table); | |
2289 | ||
2290 | if (line_header_hash) | |
2291 | htab_delete (line_header_hash); | |
2292 | ||
2293 | /* Everything else should be on the objfile obstack. */ | |
2294 | } | |
2295 | ||
2296 | /* See declaration. */ | |
2297 | ||
2298 | void | |
2299 | dwarf2_per_objfile::free_cached_comp_units () | |
2300 | { | |
2301 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2302 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2303 | while (per_cu != NULL) | |
2304 | { | |
2305 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2306 | ||
2307 | free_heap_comp_unit (per_cu->cu); | |
2308 | *last_chain = next_cu; | |
2309 | per_cu = next_cu; | |
2310 | } | |
2311 | } | |
2312 | ||
c906108c | 2313 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2314 | information and return true if we have enough to do something. |
2315 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2316 | ELF names are used. */ | |
c906108c SS |
2317 | |
2318 | int | |
251d32d9 TG |
2319 | dwarf2_has_info (struct objfile *objfile, |
2320 | const struct dwarf2_debug_sections *names) | |
c906108c | 2321 | { |
97cbe998 SDJ |
2322 | if (objfile->flags & OBJF_READNEVER) |
2323 | return 0; | |
2324 | ||
9a3c8263 SM |
2325 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2326 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2327 | if (!dwarf2_per_objfile) |
2328 | { | |
2329 | /* Initialize per-objfile state. */ | |
2330 | struct dwarf2_per_objfile *data | |
8d749320 | 2331 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2332 | |
330cdd98 PA |
2333 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2334 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2335 | } |
73869dc2 | 2336 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2337 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2338 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2339 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2340 | } |
2341 | ||
2342 | /* Return the containing section of virtual section SECTION. */ | |
2343 | ||
2344 | static struct dwarf2_section_info * | |
2345 | get_containing_section (const struct dwarf2_section_info *section) | |
2346 | { | |
2347 | gdb_assert (section->is_virtual); | |
2348 | return section->s.containing_section; | |
c906108c SS |
2349 | } |
2350 | ||
a32a8923 DE |
2351 | /* Return the bfd owner of SECTION. */ |
2352 | ||
2353 | static struct bfd * | |
2354 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2355 | { | |
73869dc2 DE |
2356 | if (section->is_virtual) |
2357 | { | |
2358 | section = get_containing_section (section); | |
2359 | gdb_assert (!section->is_virtual); | |
2360 | } | |
049412e3 | 2361 | return section->s.section->owner; |
a32a8923 DE |
2362 | } |
2363 | ||
2364 | /* Return the bfd section of SECTION. | |
2365 | Returns NULL if the section is not present. */ | |
2366 | ||
2367 | static asection * | |
2368 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2369 | { | |
73869dc2 DE |
2370 | if (section->is_virtual) |
2371 | { | |
2372 | section = get_containing_section (section); | |
2373 | gdb_assert (!section->is_virtual); | |
2374 | } | |
049412e3 | 2375 | return section->s.section; |
a32a8923 DE |
2376 | } |
2377 | ||
2378 | /* Return the name of SECTION. */ | |
2379 | ||
2380 | static const char * | |
2381 | get_section_name (const struct dwarf2_section_info *section) | |
2382 | { | |
2383 | asection *sectp = get_section_bfd_section (section); | |
2384 | ||
2385 | gdb_assert (sectp != NULL); | |
2386 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2387 | } | |
2388 | ||
2389 | /* Return the name of the file SECTION is in. */ | |
2390 | ||
2391 | static const char * | |
2392 | get_section_file_name (const struct dwarf2_section_info *section) | |
2393 | { | |
2394 | bfd *abfd = get_section_bfd_owner (section); | |
2395 | ||
2396 | return bfd_get_filename (abfd); | |
2397 | } | |
2398 | ||
2399 | /* Return the id of SECTION. | |
2400 | Returns 0 if SECTION doesn't exist. */ | |
2401 | ||
2402 | static int | |
2403 | get_section_id (const struct dwarf2_section_info *section) | |
2404 | { | |
2405 | asection *sectp = get_section_bfd_section (section); | |
2406 | ||
2407 | if (sectp == NULL) | |
2408 | return 0; | |
2409 | return sectp->id; | |
2410 | } | |
2411 | ||
2412 | /* Return the flags of SECTION. | |
73869dc2 | 2413 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2414 | |
2415 | static int | |
2416 | get_section_flags (const struct dwarf2_section_info *section) | |
2417 | { | |
2418 | asection *sectp = get_section_bfd_section (section); | |
2419 | ||
2420 | gdb_assert (sectp != NULL); | |
2421 | return bfd_get_section_flags (sectp->owner, sectp); | |
2422 | } | |
2423 | ||
251d32d9 TG |
2424 | /* When loading sections, we look either for uncompressed section or for |
2425 | compressed section names. */ | |
233a11ab CS |
2426 | |
2427 | static int | |
251d32d9 TG |
2428 | section_is_p (const char *section_name, |
2429 | const struct dwarf2_section_names *names) | |
233a11ab | 2430 | { |
251d32d9 TG |
2431 | if (names->normal != NULL |
2432 | && strcmp (section_name, names->normal) == 0) | |
2433 | return 1; | |
2434 | if (names->compressed != NULL | |
2435 | && strcmp (section_name, names->compressed) == 0) | |
2436 | return 1; | |
2437 | return 0; | |
233a11ab CS |
2438 | } |
2439 | ||
330cdd98 | 2440 | /* See declaration. */ |
c906108c | 2441 | |
330cdd98 PA |
2442 | void |
2443 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2444 | const dwarf2_debug_sections &names) | |
c906108c | 2445 | { |
dc7650b8 | 2446 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2447 | |
dc7650b8 JK |
2448 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2449 | { | |
2450 | } | |
330cdd98 | 2451 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2452 | { |
330cdd98 PA |
2453 | this->info.s.section = sectp; |
2454 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2455 | } |
330cdd98 | 2456 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2457 | { |
330cdd98 PA |
2458 | this->abbrev.s.section = sectp; |
2459 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2460 | } |
330cdd98 | 2461 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2462 | { |
330cdd98 PA |
2463 | this->line.s.section = sectp; |
2464 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2465 | } |
330cdd98 | 2466 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2467 | { |
330cdd98 PA |
2468 | this->loc.s.section = sectp; |
2469 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2470 | } |
330cdd98 | 2471 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2472 | { |
330cdd98 PA |
2473 | this->loclists.s.section = sectp; |
2474 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2475 | } |
330cdd98 | 2476 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2477 | { |
330cdd98 PA |
2478 | this->macinfo.s.section = sectp; |
2479 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2480 | } |
330cdd98 | 2481 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2482 | { |
330cdd98 PA |
2483 | this->macro.s.section = sectp; |
2484 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2485 | } |
330cdd98 | 2486 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2487 | { |
330cdd98 PA |
2488 | this->str.s.section = sectp; |
2489 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2490 | } |
330cdd98 | 2491 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2492 | { |
330cdd98 PA |
2493 | this->line_str.s.section = sectp; |
2494 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2495 | } |
330cdd98 | 2496 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2497 | { |
330cdd98 PA |
2498 | this->addr.s.section = sectp; |
2499 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2500 | } |
330cdd98 | 2501 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2502 | { |
330cdd98 PA |
2503 | this->frame.s.section = sectp; |
2504 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2505 | } |
330cdd98 | 2506 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2507 | { |
330cdd98 PA |
2508 | this->eh_frame.s.section = sectp; |
2509 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2510 | } |
330cdd98 | 2511 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2512 | { |
330cdd98 PA |
2513 | this->ranges.s.section = sectp; |
2514 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2515 | } |
330cdd98 | 2516 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2517 | { |
330cdd98 PA |
2518 | this->rnglists.s.section = sectp; |
2519 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2520 | } |
330cdd98 | 2521 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2522 | { |
8b70b953 TT |
2523 | struct dwarf2_section_info type_section; |
2524 | ||
2525 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2526 | type_section.s.section = sectp; |
8b70b953 TT |
2527 | type_section.size = bfd_get_section_size (sectp); |
2528 | ||
330cdd98 | 2529 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2530 | &type_section); |
348e048f | 2531 | } |
330cdd98 | 2532 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2533 | { |
330cdd98 PA |
2534 | this->gdb_index.s.section = sectp; |
2535 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2536 | } |
dce234bc | 2537 | |
b4e1fd61 | 2538 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2539 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2540 | this->has_section_at_zero = true; |
c906108c SS |
2541 | } |
2542 | ||
fceca515 DE |
2543 | /* A helper function that decides whether a section is empty, |
2544 | or not present. */ | |
9e0ac564 TT |
2545 | |
2546 | static int | |
19ac8c2e | 2547 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2548 | { |
73869dc2 DE |
2549 | if (section->is_virtual) |
2550 | return section->size == 0; | |
049412e3 | 2551 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2552 | } |
2553 | ||
3019eac3 DE |
2554 | /* Read the contents of the section INFO. |
2555 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2556 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2557 | of the DWO file. | |
dce234bc | 2558 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2559 | |
dce234bc PP |
2560 | static void |
2561 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2562 | { |
a32a8923 | 2563 | asection *sectp; |
3019eac3 | 2564 | bfd *abfd; |
dce234bc | 2565 | gdb_byte *buf, *retbuf; |
c906108c | 2566 | |
be391dca TT |
2567 | if (info->readin) |
2568 | return; | |
dce234bc | 2569 | info->buffer = NULL; |
be391dca | 2570 | info->readin = 1; |
188dd5d6 | 2571 | |
9e0ac564 | 2572 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2573 | return; |
c906108c | 2574 | |
a32a8923 | 2575 | sectp = get_section_bfd_section (info); |
3019eac3 | 2576 | |
73869dc2 DE |
2577 | /* If this is a virtual section we need to read in the real one first. */ |
2578 | if (info->is_virtual) | |
2579 | { | |
2580 | struct dwarf2_section_info *containing_section = | |
2581 | get_containing_section (info); | |
2582 | ||
2583 | gdb_assert (sectp != NULL); | |
2584 | if ((sectp->flags & SEC_RELOC) != 0) | |
2585 | { | |
2586 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2587 | " supported in section %s [in module %s]"), | |
2588 | get_section_name (info), get_section_file_name (info)); | |
2589 | } | |
2590 | dwarf2_read_section (objfile, containing_section); | |
2591 | /* Other code should have already caught virtual sections that don't | |
2592 | fit. */ | |
2593 | gdb_assert (info->virtual_offset + info->size | |
2594 | <= containing_section->size); | |
2595 | /* If the real section is empty or there was a problem reading the | |
2596 | section we shouldn't get here. */ | |
2597 | gdb_assert (containing_section->buffer != NULL); | |
2598 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2599 | return; | |
2600 | } | |
2601 | ||
4bf44c1c TT |
2602 | /* If the section has relocations, we must read it ourselves. |
2603 | Otherwise we attach it to the BFD. */ | |
2604 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2605 | { |
d521ce57 | 2606 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2607 | return; |
dce234bc | 2608 | } |
dce234bc | 2609 | |
224c3ddb | 2610 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2611 | info->buffer = buf; |
dce234bc PP |
2612 | |
2613 | /* When debugging .o files, we may need to apply relocations; see | |
2614 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2615 | We never compress sections in .o files, so we only need to | |
2616 | try this when the section is not compressed. */ | |
ac8035ab | 2617 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2618 | if (retbuf != NULL) |
2619 | { | |
2620 | info->buffer = retbuf; | |
2621 | return; | |
2622 | } | |
2623 | ||
a32a8923 DE |
2624 | abfd = get_section_bfd_owner (info); |
2625 | gdb_assert (abfd != NULL); | |
2626 | ||
dce234bc PP |
2627 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2628 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2629 | { |
2630 | error (_("Dwarf Error: Can't read DWARF data" | |
2631 | " in section %s [in module %s]"), | |
2632 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2633 | } | |
dce234bc PP |
2634 | } |
2635 | ||
9e0ac564 TT |
2636 | /* A helper function that returns the size of a section in a safe way. |
2637 | If you are positive that the section has been read before using the | |
2638 | size, then it is safe to refer to the dwarf2_section_info object's | |
2639 | "size" field directly. In other cases, you must call this | |
2640 | function, because for compressed sections the size field is not set | |
2641 | correctly until the section has been read. */ | |
2642 | ||
2643 | static bfd_size_type | |
2644 | dwarf2_section_size (struct objfile *objfile, | |
2645 | struct dwarf2_section_info *info) | |
2646 | { | |
2647 | if (!info->readin) | |
2648 | dwarf2_read_section (objfile, info); | |
2649 | return info->size; | |
2650 | } | |
2651 | ||
dce234bc | 2652 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2653 | SECTION_NAME. */ |
af34e669 | 2654 | |
dce234bc | 2655 | void |
3017a003 TG |
2656 | dwarf2_get_section_info (struct objfile *objfile, |
2657 | enum dwarf2_section_enum sect, | |
d521ce57 | 2658 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2659 | bfd_size_type *sizep) |
2660 | { | |
2661 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2662 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2663 | dwarf2_objfile_data_key); | |
dce234bc | 2664 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2665 | |
2666 | /* We may see an objfile without any DWARF, in which case we just | |
2667 | return nothing. */ | |
2668 | if (data == NULL) | |
2669 | { | |
2670 | *sectp = NULL; | |
2671 | *bufp = NULL; | |
2672 | *sizep = 0; | |
2673 | return; | |
2674 | } | |
3017a003 TG |
2675 | switch (sect) |
2676 | { | |
2677 | case DWARF2_DEBUG_FRAME: | |
2678 | info = &data->frame; | |
2679 | break; | |
2680 | case DWARF2_EH_FRAME: | |
2681 | info = &data->eh_frame; | |
2682 | break; | |
2683 | default: | |
2684 | gdb_assert_not_reached ("unexpected section"); | |
2685 | } | |
dce234bc | 2686 | |
9e0ac564 | 2687 | dwarf2_read_section (objfile, info); |
dce234bc | 2688 | |
a32a8923 | 2689 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2690 | *bufp = info->buffer; |
2691 | *sizep = info->size; | |
2692 | } | |
2693 | ||
36586728 TT |
2694 | /* A helper function to find the sections for a .dwz file. */ |
2695 | ||
2696 | static void | |
2697 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2698 | { | |
9a3c8263 | 2699 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2700 | |
2701 | /* Note that we only support the standard ELF names, because .dwz | |
2702 | is ELF-only (at the time of writing). */ | |
2703 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2704 | { | |
049412e3 | 2705 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2706 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2707 | } | |
2708 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2709 | { | |
049412e3 | 2710 | dwz_file->info.s.section = sectp; |
36586728 TT |
2711 | dwz_file->info.size = bfd_get_section_size (sectp); |
2712 | } | |
2713 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2714 | { | |
049412e3 | 2715 | dwz_file->str.s.section = sectp; |
36586728 TT |
2716 | dwz_file->str.size = bfd_get_section_size (sectp); |
2717 | } | |
2718 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2719 | { | |
049412e3 | 2720 | dwz_file->line.s.section = sectp; |
36586728 TT |
2721 | dwz_file->line.size = bfd_get_section_size (sectp); |
2722 | } | |
2723 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2724 | { | |
049412e3 | 2725 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2726 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2727 | } | |
2ec9a5e0 TT |
2728 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2729 | { | |
049412e3 | 2730 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2731 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2732 | } | |
36586728 TT |
2733 | } |
2734 | ||
4db1a1dc TT |
2735 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2736 | there is no .gnu_debugaltlink section in the file. Error if there | |
2737 | is such a section but the file cannot be found. */ | |
36586728 TT |
2738 | |
2739 | static struct dwz_file * | |
2740 | dwarf2_get_dwz_file (void) | |
2741 | { | |
36586728 TT |
2742 | const char *filename; |
2743 | struct dwz_file *result; | |
acd13123 | 2744 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2745 | size_t buildid_len; |
2746 | bfd_byte *buildid; | |
36586728 TT |
2747 | |
2748 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2749 | return dwarf2_per_objfile->dwz_file; | |
2750 | ||
4db1a1dc | 2751 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2752 | gdb::unique_xmalloc_ptr<char> data |
2753 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2754 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2755 | if (data == NULL) |
2756 | { | |
2757 | if (bfd_get_error () == bfd_error_no_error) | |
2758 | return NULL; | |
2759 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2760 | bfd_errmsg (bfd_get_error ())); | |
2761 | } | |
791afaa2 TT |
2762 | |
2763 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2764 | |
acd13123 TT |
2765 | buildid_len = (size_t) buildid_len_arg; |
2766 | ||
791afaa2 | 2767 | filename = data.get (); |
d721ba37 PA |
2768 | |
2769 | std::string abs_storage; | |
36586728 TT |
2770 | if (!IS_ABSOLUTE_PATH (filename)) |
2771 | { | |
14278e1f TT |
2772 | gdb::unique_xmalloc_ptr<char> abs |
2773 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2774 | |
14278e1f | 2775 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2776 | filename = abs_storage.c_str (); |
36586728 TT |
2777 | } |
2778 | ||
dc294be5 TT |
2779 | /* First try the file name given in the section. If that doesn't |
2780 | work, try to use the build-id instead. */ | |
192b62ce | 2781 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2782 | if (dwz_bfd != NULL) |
36586728 | 2783 | { |
192b62ce TT |
2784 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2785 | dwz_bfd.release (); | |
36586728 TT |
2786 | } |
2787 | ||
dc294be5 TT |
2788 | if (dwz_bfd == NULL) |
2789 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2790 | ||
2791 | if (dwz_bfd == NULL) | |
2792 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2793 | objfile_name (dwarf2_per_objfile->objfile)); | |
2794 | ||
36586728 TT |
2795 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2796 | struct dwz_file); | |
192b62ce | 2797 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2798 | |
192b62ce | 2799 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 | 2800 | |
192b62ce | 2801 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2802 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2803 | return result; |
2804 | } | |
9291a0cd | 2805 | \f |
7b9f3c50 DE |
2806 | /* DWARF quick_symbols_functions support. */ |
2807 | ||
2808 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2809 | unique line tables, so we maintain a separate table of all .debug_line | |
2810 | derived entries to support the sharing. | |
2811 | All the quick functions need is the list of file names. We discard the | |
2812 | line_header when we're done and don't need to record it here. */ | |
2813 | struct quick_file_names | |
2814 | { | |
094b34ac DE |
2815 | /* The data used to construct the hash key. */ |
2816 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2817 | |
2818 | /* The number of entries in file_names, real_names. */ | |
2819 | unsigned int num_file_names; | |
2820 | ||
2821 | /* The file names from the line table, after being run through | |
2822 | file_full_name. */ | |
2823 | const char **file_names; | |
2824 | ||
2825 | /* The file names from the line table after being run through | |
2826 | gdb_realpath. These are computed lazily. */ | |
2827 | const char **real_names; | |
2828 | }; | |
2829 | ||
2830 | /* When using the index (and thus not using psymtabs), each CU has an | |
2831 | object of this type. This is used to hold information needed by | |
2832 | the various "quick" methods. */ | |
2833 | struct dwarf2_per_cu_quick_data | |
2834 | { | |
2835 | /* The file table. This can be NULL if there was no file table | |
2836 | or it's currently not read in. | |
2837 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2838 | struct quick_file_names *file_names; | |
2839 | ||
2840 | /* The corresponding symbol table. This is NULL if symbols for this | |
2841 | CU have not yet been read. */ | |
43f3e411 | 2842 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2843 | |
2844 | /* A temporary mark bit used when iterating over all CUs in | |
2845 | expand_symtabs_matching. */ | |
2846 | unsigned int mark : 1; | |
2847 | ||
2848 | /* True if we've tried to read the file table and found there isn't one. | |
2849 | There will be no point in trying to read it again next time. */ | |
2850 | unsigned int no_file_data : 1; | |
2851 | }; | |
2852 | ||
094b34ac DE |
2853 | /* Utility hash function for a stmt_list_hash. */ |
2854 | ||
2855 | static hashval_t | |
2856 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2857 | { | |
2858 | hashval_t v = 0; | |
2859 | ||
2860 | if (stmt_list_hash->dwo_unit != NULL) | |
2861 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2862 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2863 | return v; |
2864 | } | |
2865 | ||
2866 | /* Utility equality function for a stmt_list_hash. */ | |
2867 | ||
2868 | static int | |
2869 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2870 | const struct stmt_list_hash *rhs) | |
2871 | { | |
2872 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2873 | return 0; | |
2874 | if (lhs->dwo_unit != NULL | |
2875 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2876 | return 0; | |
2877 | ||
9c541725 | 2878 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2879 | } |
2880 | ||
7b9f3c50 DE |
2881 | /* Hash function for a quick_file_names. */ |
2882 | ||
2883 | static hashval_t | |
2884 | hash_file_name_entry (const void *e) | |
2885 | { | |
9a3c8263 SM |
2886 | const struct quick_file_names *file_data |
2887 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2888 | |
094b34ac | 2889 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2890 | } |
2891 | ||
2892 | /* Equality function for a quick_file_names. */ | |
2893 | ||
2894 | static int | |
2895 | eq_file_name_entry (const void *a, const void *b) | |
2896 | { | |
9a3c8263 SM |
2897 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2898 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2899 | |
094b34ac | 2900 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2901 | } |
2902 | ||
2903 | /* Delete function for a quick_file_names. */ | |
2904 | ||
2905 | static void | |
2906 | delete_file_name_entry (void *e) | |
2907 | { | |
9a3c8263 | 2908 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2909 | int i; |
2910 | ||
2911 | for (i = 0; i < file_data->num_file_names; ++i) | |
2912 | { | |
2913 | xfree ((void*) file_data->file_names[i]); | |
2914 | if (file_data->real_names) | |
2915 | xfree ((void*) file_data->real_names[i]); | |
2916 | } | |
2917 | ||
2918 | /* The space for the struct itself lives on objfile_obstack, | |
2919 | so we don't free it here. */ | |
2920 | } | |
2921 | ||
2922 | /* Create a quick_file_names hash table. */ | |
2923 | ||
2924 | static htab_t | |
2925 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2926 | { | |
2927 | return htab_create_alloc (nr_initial_entries, | |
2928 | hash_file_name_entry, eq_file_name_entry, | |
2929 | delete_file_name_entry, xcalloc, xfree); | |
2930 | } | |
9291a0cd | 2931 | |
918dd910 JK |
2932 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2933 | have to be created afterwards. You should call age_cached_comp_units after | |
2934 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2935 | ||
2936 | static void | |
2937 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2938 | { | |
3019eac3 | 2939 | if (per_cu->is_debug_types) |
e5fe5e75 | 2940 | load_full_type_unit (per_cu); |
918dd910 | 2941 | else |
95554aad | 2942 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2943 | |
cc12ce38 DE |
2944 | if (per_cu->cu == NULL) |
2945 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2946 | |
2947 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2948 | } |
2949 | ||
a0f42c21 | 2950 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2951 | |
9291a0cd | 2952 | static void |
a0f42c21 | 2953 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2954 | { |
2955 | struct cleanup *back_to; | |
2956 | ||
f4dc4d17 DE |
2957 | /* Skip type_unit_groups, reading the type units they contain |
2958 | is handled elsewhere. */ | |
2959 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2960 | return; | |
2961 | ||
9291a0cd TT |
2962 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2963 | ||
95554aad | 2964 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2965 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2966 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2967 | { | |
2968 | queue_comp_unit (per_cu, language_minimal); | |
2969 | load_cu (per_cu); | |
89e63ee4 DE |
2970 | |
2971 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2972 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2973 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2974 | if (!per_cu->is_debug_types | |
cc12ce38 | 2975 | && per_cu->cu != NULL |
89e63ee4 DE |
2976 | && per_cu->cu->dwo_unit != NULL |
2977 | && dwarf2_per_objfile->index_table != NULL | |
2978 | && dwarf2_per_objfile->index_table->version <= 7 | |
2979 | /* DWP files aren't supported yet. */ | |
2980 | && get_dwp_file () == NULL) | |
2981 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2982 | } |
9291a0cd | 2983 | |
a0f42c21 | 2984 | process_queue (); |
9291a0cd TT |
2985 | |
2986 | /* Age the cache, releasing compilation units that have not | |
2987 | been used recently. */ | |
2988 | age_cached_comp_units (); | |
2989 | ||
2990 | do_cleanups (back_to); | |
2991 | } | |
2992 | ||
2993 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2994 | the objfile from which this CU came. Returns the resulting symbol | |
2995 | table. */ | |
2fdf6df6 | 2996 | |
43f3e411 | 2997 | static struct compunit_symtab * |
a0f42c21 | 2998 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2999 | { |
95554aad | 3000 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 3001 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3002 | { |
3003 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 3004 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 3005 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 3006 | process_cu_includes (); |
9291a0cd TT |
3007 | do_cleanups (back_to); |
3008 | } | |
f194fefb | 3009 | |
43f3e411 | 3010 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
3011 | } |
3012 | ||
8832e7e3 | 3013 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
3014 | |
3015 | This is intended for loops like: | |
3016 | ||
3017 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
3018 | + dwarf2_per_objfile->n_type_units); ++i) | |
3019 | { | |
8832e7e3 | 3020 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
3021 | |
3022 | ...; | |
3023 | } | |
3024 | */ | |
2fdf6df6 | 3025 | |
1fd400ff | 3026 | static struct dwarf2_per_cu_data * |
8832e7e3 | 3027 | dw2_get_cutu (int index) |
1fd400ff TT |
3028 | { |
3029 | if (index >= dwarf2_per_objfile->n_comp_units) | |
3030 | { | |
f4dc4d17 | 3031 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
3032 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
3033 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
3034 | } |
3035 | ||
3036 | return dwarf2_per_objfile->all_comp_units[index]; | |
3037 | } | |
3038 | ||
8832e7e3 DE |
3039 | /* Return the CU given its index. |
3040 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
3041 | refers to a CU. */ | |
f4dc4d17 DE |
3042 | |
3043 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 3044 | dw2_get_cu (int index) |
f4dc4d17 | 3045 | { |
8832e7e3 | 3046 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 3047 | |
1fd400ff TT |
3048 | return dwarf2_per_objfile->all_comp_units[index]; |
3049 | } | |
3050 | ||
2ec9a5e0 TT |
3051 | /* A helper for create_cus_from_index that handles a given list of |
3052 | CUs. */ | |
2fdf6df6 | 3053 | |
74a0d9f6 | 3054 | static void |
2ec9a5e0 TT |
3055 | create_cus_from_index_list (struct objfile *objfile, |
3056 | const gdb_byte *cu_list, offset_type n_elements, | |
3057 | struct dwarf2_section_info *section, | |
3058 | int is_dwz, | |
3059 | int base_offset) | |
9291a0cd TT |
3060 | { |
3061 | offset_type i; | |
9291a0cd | 3062 | |
2ec9a5e0 | 3063 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3064 | { |
74a0d9f6 | 3065 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3066 | |
3067 | sect_offset sect_off | |
3068 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3069 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3070 | cu_list += 2 * 8; |
3071 | ||
9c541725 PA |
3072 | dwarf2_per_cu_data *the_cu |
3073 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3074 | struct dwarf2_per_cu_data); | |
3075 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3076 | the_cu->length = length; |
3077 | the_cu->objfile = objfile; | |
8a0459fd | 3078 | the_cu->section = section; |
9291a0cd TT |
3079 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3080 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3081 | the_cu->is_dwz = is_dwz; |
3082 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3083 | } |
9291a0cd TT |
3084 | } |
3085 | ||
2ec9a5e0 | 3086 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3087 | the CU objects for this objfile. */ |
2ec9a5e0 | 3088 | |
74a0d9f6 | 3089 | static void |
2ec9a5e0 TT |
3090 | create_cus_from_index (struct objfile *objfile, |
3091 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3092 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3093 | { | |
3094 | struct dwz_file *dwz; | |
3095 | ||
3096 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3097 | dwarf2_per_objfile->all_comp_units = |
3098 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3099 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3100 | |
74a0d9f6 JK |
3101 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3102 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3103 | |
3104 | if (dwz_elements == 0) | |
74a0d9f6 | 3105 | return; |
2ec9a5e0 TT |
3106 | |
3107 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3108 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3109 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3110 | } |
3111 | ||
1fd400ff | 3112 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3113 | |
74a0d9f6 | 3114 | static void |
673bfd45 | 3115 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3116 | struct dwarf2_section_info *section, |
673bfd45 DE |
3117 | const gdb_byte *bytes, |
3118 | offset_type elements) | |
1fd400ff TT |
3119 | { |
3120 | offset_type i; | |
673bfd45 | 3121 | htab_t sig_types_hash; |
1fd400ff | 3122 | |
6aa5f3a6 DE |
3123 | dwarf2_per_objfile->n_type_units |
3124 | = dwarf2_per_objfile->n_allocated_type_units | |
3125 | = elements / 3; | |
8d749320 SM |
3126 | dwarf2_per_objfile->all_type_units = |
3127 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3128 | |
673bfd45 | 3129 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3130 | |
3131 | for (i = 0; i < elements; i += 3) | |
3132 | { | |
52dc124a | 3133 | struct signatured_type *sig_type; |
9c541725 | 3134 | ULONGEST signature; |
1fd400ff | 3135 | void **slot; |
9c541725 | 3136 | cu_offset type_offset_in_tu; |
1fd400ff | 3137 | |
74a0d9f6 | 3138 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3139 | sect_offset sect_off |
3140 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3141 | type_offset_in_tu | |
3142 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3143 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3144 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3145 | bytes += 3 * 8; | |
3146 | ||
52dc124a | 3147 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3148 | struct signatured_type); |
52dc124a | 3149 | sig_type->signature = signature; |
9c541725 | 3150 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3151 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3152 | sig_type->per_cu.section = section; |
9c541725 | 3153 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3154 | sig_type->per_cu.objfile = objfile; |
3155 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3156 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3157 | struct dwarf2_per_cu_quick_data); | |
3158 | ||
52dc124a DE |
3159 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3160 | *slot = sig_type; | |
1fd400ff | 3161 | |
b4dd5633 | 3162 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3163 | } |
3164 | ||
673bfd45 | 3165 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3166 | } |
3167 | ||
9291a0cd TT |
3168 | /* Read the address map data from the mapped index, and use it to |
3169 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3170 | |
9291a0cd TT |
3171 | static void |
3172 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3173 | { | |
3e29f34a | 3174 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3175 | const gdb_byte *iter, *end; |
9291a0cd | 3176 | struct addrmap *mutable_map; |
9291a0cd TT |
3177 | CORE_ADDR baseaddr; |
3178 | ||
8268c778 PA |
3179 | auto_obstack temp_obstack; |
3180 | ||
9291a0cd TT |
3181 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3182 | ||
3183 | iter = index->address_table; | |
3184 | end = iter + index->address_table_size; | |
3185 | ||
3186 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3187 | ||
3188 | while (iter < end) | |
3189 | { | |
3190 | ULONGEST hi, lo, cu_index; | |
3191 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3192 | iter += 8; | |
3193 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3194 | iter += 8; | |
3195 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3196 | iter += 4; | |
f652bce2 | 3197 | |
24a55014 | 3198 | if (lo > hi) |
f652bce2 | 3199 | { |
24a55014 DE |
3200 | complaint (&symfile_complaints, |
3201 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3202 | hex_string (lo), hex_string (hi)); |
24a55014 | 3203 | continue; |
f652bce2 | 3204 | } |
24a55014 DE |
3205 | |
3206 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3207 | { |
3208 | complaint (&symfile_complaints, | |
3209 | _(".gdb_index address table has invalid CU number %u"), | |
3210 | (unsigned) cu_index); | |
24a55014 | 3211 | continue; |
f652bce2 | 3212 | } |
24a55014 | 3213 | |
3e29f34a MR |
3214 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3215 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3216 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3217 | } |
3218 | ||
3219 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3220 | &objfile->objfile_obstack); | |
9291a0cd TT |
3221 | } |
3222 | ||
59d7bcaf JK |
3223 | /* The hash function for strings in the mapped index. This is the same as |
3224 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3225 | implementation. This is necessary because the hash function is tied to the | |
3226 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3227 | SYMBOL_HASH_NEXT. |
3228 | ||
3229 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3230 | |
9291a0cd | 3231 | static hashval_t |
559a7a62 | 3232 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3233 | { |
3234 | const unsigned char *str = (const unsigned char *) p; | |
3235 | hashval_t r = 0; | |
3236 | unsigned char c; | |
3237 | ||
3238 | while ((c = *str++) != 0) | |
559a7a62 JK |
3239 | { |
3240 | if (index_version >= 5) | |
3241 | c = tolower (c); | |
3242 | r = r * 67 + c - 113; | |
3243 | } | |
9291a0cd TT |
3244 | |
3245 | return r; | |
3246 | } | |
3247 | ||
3248 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3249 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3250 | constant pool and return true. If NAME cannot be found, return |
3251 | false. */ | |
2fdf6df6 | 3252 | |
109483d9 | 3253 | static bool |
9291a0cd TT |
3254 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3255 | offset_type **vec_out) | |
3256 | { | |
0cf03b49 | 3257 | offset_type hash; |
9291a0cd | 3258 | offset_type slot, step; |
559a7a62 | 3259 | int (*cmp) (const char *, const char *); |
9291a0cd | 3260 | |
791afaa2 | 3261 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3262 | if (current_language->la_language == language_cplus |
45280282 IB |
3263 | || current_language->la_language == language_fortran |
3264 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3265 | { |
3266 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3267 | not contain any. */ | |
a8719064 | 3268 | |
72998fb3 | 3269 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3270 | { |
109483d9 | 3271 | without_params = cp_remove_params (name); |
0cf03b49 | 3272 | |
72998fb3 | 3273 | if (without_params != NULL) |
791afaa2 | 3274 | name = without_params.get (); |
0cf03b49 JK |
3275 | } |
3276 | } | |
3277 | ||
559a7a62 | 3278 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3279 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3280 | simulate our NAME being searched is also lowercased. */ |
3281 | hash = mapped_index_string_hash ((index->version == 4 | |
3282 | && case_sensitivity == case_sensitive_off | |
3283 | ? 5 : index->version), | |
3284 | name); | |
3285 | ||
3876f04e DE |
3286 | slot = hash & (index->symbol_table_slots - 1); |
3287 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3288 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3289 | |
3290 | for (;;) | |
3291 | { | |
3292 | /* Convert a slot number to an offset into the table. */ | |
3293 | offset_type i = 2 * slot; | |
3294 | const char *str; | |
3876f04e | 3295 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
109483d9 | 3296 | return false; |
9291a0cd | 3297 | |
3876f04e | 3298 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3299 | if (!cmp (name, str)) |
9291a0cd TT |
3300 | { |
3301 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3302 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
109483d9 | 3303 | return true; |
9291a0cd TT |
3304 | } |
3305 | ||
3876f04e | 3306 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3307 | } |
3308 | } | |
3309 | ||
2ec9a5e0 TT |
3310 | /* A helper function that reads the .gdb_index from SECTION and fills |
3311 | in MAP. FILENAME is the name of the file containing the section; | |
3312 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3313 | ok to use deprecated sections. | |
3314 | ||
3315 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3316 | out parameters that are filled in with information about the CU and | |
3317 | TU lists in the section. | |
3318 | ||
3319 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3320 | |
9291a0cd | 3321 | static int |
2ec9a5e0 TT |
3322 | read_index_from_section (struct objfile *objfile, |
3323 | const char *filename, | |
3324 | int deprecated_ok, | |
3325 | struct dwarf2_section_info *section, | |
3326 | struct mapped_index *map, | |
3327 | const gdb_byte **cu_list, | |
3328 | offset_type *cu_list_elements, | |
3329 | const gdb_byte **types_list, | |
3330 | offset_type *types_list_elements) | |
9291a0cd | 3331 | { |
948f8e3d | 3332 | const gdb_byte *addr; |
2ec9a5e0 | 3333 | offset_type version; |
b3b272e1 | 3334 | offset_type *metadata; |
1fd400ff | 3335 | int i; |
9291a0cd | 3336 | |
2ec9a5e0 | 3337 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3338 | return 0; |
82430852 JK |
3339 | |
3340 | /* Older elfutils strip versions could keep the section in the main | |
3341 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3342 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3343 | return 0; |
3344 | ||
2ec9a5e0 | 3345 | dwarf2_read_section (objfile, section); |
9291a0cd | 3346 | |
2ec9a5e0 | 3347 | addr = section->buffer; |
9291a0cd | 3348 | /* Version check. */ |
1fd400ff | 3349 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3350 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3351 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3352 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3353 | indices. */ |
831adc1f | 3354 | if (version < 4) |
481860b3 GB |
3355 | { |
3356 | static int warning_printed = 0; | |
3357 | if (!warning_printed) | |
3358 | { | |
3359 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3360 | filename); |
481860b3 GB |
3361 | warning_printed = 1; |
3362 | } | |
3363 | return 0; | |
3364 | } | |
3365 | /* Index version 4 uses a different hash function than index version | |
3366 | 5 and later. | |
3367 | ||
3368 | Versions earlier than 6 did not emit psymbols for inlined | |
3369 | functions. Using these files will cause GDB not to be able to | |
3370 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3371 | indices unless the user has done |
3372 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3373 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3374 | { |
3375 | static int warning_printed = 0; | |
3376 | if (!warning_printed) | |
3377 | { | |
e615022a DE |
3378 | warning (_("\ |
3379 | Skipping deprecated .gdb_index section in %s.\n\ | |
3380 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3381 | to use the section anyway."), | |
2ec9a5e0 | 3382 | filename); |
481860b3 GB |
3383 | warning_printed = 1; |
3384 | } | |
3385 | return 0; | |
3386 | } | |
796a7ff8 | 3387 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3388 | of the TU (for symbols coming from TUs), |
3389 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3390 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3391 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3392 | These are just performance bugs, and we can't distinguish gdb-generated | |
3393 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3394 | |
481860b3 | 3395 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3396 | longer backward compatible. */ |
796a7ff8 | 3397 | if (version > 8) |
594e8718 | 3398 | return 0; |
9291a0cd | 3399 | |
559a7a62 | 3400 | map->version = version; |
2ec9a5e0 | 3401 | map->total_size = section->size; |
9291a0cd TT |
3402 | |
3403 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3404 | |
3405 | i = 0; | |
2ec9a5e0 TT |
3406 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3407 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3408 | / 8); | |
1fd400ff TT |
3409 | ++i; |
3410 | ||
2ec9a5e0 TT |
3411 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3412 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3413 | - MAYBE_SWAP (metadata[i])) | |
3414 | / 8); | |
987d643c | 3415 | ++i; |
1fd400ff TT |
3416 | |
3417 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3418 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3419 | - MAYBE_SWAP (metadata[i])); | |
3420 | ++i; | |
3421 | ||
3876f04e DE |
3422 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3423 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3424 | - MAYBE_SWAP (metadata[i])) | |
3425 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3426 | ++i; |
9291a0cd | 3427 | |
f9d83a0b | 3428 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3429 | |
2ec9a5e0 TT |
3430 | return 1; |
3431 | } | |
3432 | ||
3433 | ||
3434 | /* Read the index file. If everything went ok, initialize the "quick" | |
3435 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3436 | ||
3437 | static int | |
3438 | dwarf2_read_index (struct objfile *objfile) | |
3439 | { | |
3440 | struct mapped_index local_map, *map; | |
3441 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3442 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3443 | struct dwz_file *dwz; |
2ec9a5e0 | 3444 | |
4262abfb | 3445 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3446 | use_deprecated_index_sections, |
3447 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3448 | &cu_list, &cu_list_elements, | |
3449 | &types_list, &types_list_elements)) | |
3450 | return 0; | |
3451 | ||
0fefef59 | 3452 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3453 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3454 | return 0; |
3455 | ||
2ec9a5e0 TT |
3456 | /* If there is a .dwz file, read it so we can get its CU list as |
3457 | well. */ | |
4db1a1dc TT |
3458 | dwz = dwarf2_get_dwz_file (); |
3459 | if (dwz != NULL) | |
2ec9a5e0 | 3460 | { |
2ec9a5e0 TT |
3461 | struct mapped_index dwz_map; |
3462 | const gdb_byte *dwz_types_ignore; | |
3463 | offset_type dwz_types_elements_ignore; | |
3464 | ||
3465 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3466 | 1, | |
3467 | &dwz->gdb_index, &dwz_map, | |
3468 | &dwz_list, &dwz_list_elements, | |
3469 | &dwz_types_ignore, | |
3470 | &dwz_types_elements_ignore)) | |
3471 | { | |
3472 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3473 | bfd_get_filename (dwz->dwz_bfd)); | |
3474 | return 0; | |
3475 | } | |
3476 | } | |
3477 | ||
74a0d9f6 JK |
3478 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3479 | dwz_list_elements); | |
1fd400ff | 3480 | |
8b70b953 TT |
3481 | if (types_list_elements) |
3482 | { | |
3483 | struct dwarf2_section_info *section; | |
3484 | ||
3485 | /* We can only handle a single .debug_types when we have an | |
3486 | index. */ | |
3487 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3488 | return 0; | |
3489 | ||
3490 | section = VEC_index (dwarf2_section_info_def, | |
3491 | dwarf2_per_objfile->types, 0); | |
3492 | ||
74a0d9f6 JK |
3493 | create_signatured_type_table_from_index (objfile, section, types_list, |
3494 | types_list_elements); | |
8b70b953 | 3495 | } |
9291a0cd | 3496 | |
2ec9a5e0 TT |
3497 | create_addrmap_from_index (objfile, &local_map); |
3498 | ||
8d749320 | 3499 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
3f563c84 | 3500 | map = new (map) mapped_index (); |
2ec9a5e0 | 3501 | *map = local_map; |
9291a0cd TT |
3502 | |
3503 | dwarf2_per_objfile->index_table = map; | |
3504 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3505 | dwarf2_per_objfile->quick_file_names_table = |
3506 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3507 | |
3508 | return 1; | |
3509 | } | |
3510 | ||
3511 | /* A helper for the "quick" functions which sets the global | |
3512 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3513 | |
9291a0cd TT |
3514 | static void |
3515 | dw2_setup (struct objfile *objfile) | |
3516 | { | |
9a3c8263 SM |
3517 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3518 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3519 | gdb_assert (dwarf2_per_objfile); |
3520 | } | |
3521 | ||
dee91e82 | 3522 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3523 | |
dee91e82 DE |
3524 | static void |
3525 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3526 | const gdb_byte *info_ptr, |
dee91e82 DE |
3527 | struct die_info *comp_unit_die, |
3528 | int has_children, | |
3529 | void *data) | |
9291a0cd | 3530 | { |
dee91e82 DE |
3531 | struct dwarf2_cu *cu = reader->cu; |
3532 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3533 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3534 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3535 | struct attribute *attr; |
dee91e82 | 3536 | int i; |
7b9f3c50 DE |
3537 | void **slot; |
3538 | struct quick_file_names *qfn; | |
9291a0cd | 3539 | |
0186c6a7 DE |
3540 | gdb_assert (! this_cu->is_debug_types); |
3541 | ||
07261596 TT |
3542 | /* Our callers never want to match partial units -- instead they |
3543 | will match the enclosing full CU. */ | |
3544 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3545 | { | |
3546 | this_cu->v.quick->no_file_data = 1; | |
3547 | return; | |
3548 | } | |
3549 | ||
0186c6a7 | 3550 | lh_cu = this_cu; |
7b9f3c50 | 3551 | slot = NULL; |
dee91e82 | 3552 | |
fff8551c | 3553 | line_header_up lh; |
9c541725 | 3554 | sect_offset line_offset {}; |
fff8551c | 3555 | |
dee91e82 | 3556 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3557 | if (attr) |
3558 | { | |
7b9f3c50 DE |
3559 | struct quick_file_names find_entry; |
3560 | ||
9c541725 | 3561 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3562 | |
3563 | /* We may have already read in this line header (TU line header sharing). | |
3564 | If we have we're done. */ | |
094b34ac | 3565 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3566 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3567 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3568 | &find_entry, INSERT); | |
3569 | if (*slot != NULL) | |
3570 | { | |
9a3c8263 | 3571 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3572 | return; |
7b9f3c50 DE |
3573 | } |
3574 | ||
3019eac3 | 3575 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3576 | } |
3577 | if (lh == NULL) | |
3578 | { | |
094b34ac | 3579 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3580 | return; |
9291a0cd TT |
3581 | } |
3582 | ||
8d749320 | 3583 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3584 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3585 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3586 | gdb_assert (slot != NULL); |
3587 | *slot = qfn; | |
9291a0cd | 3588 | |
d721ba37 | 3589 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3590 | |
fff8551c | 3591 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3592 | qfn->file_names = |
fff8551c PA |
3593 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3594 | for (i = 0; i < lh->file_names.size (); ++i) | |
3595 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3596 | qfn->real_names = NULL; |
9291a0cd | 3597 | |
094b34ac | 3598 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3599 | } |
3600 | ||
3601 | /* A helper for the "quick" functions which attempts to read the line | |
3602 | table for THIS_CU. */ | |
3603 | ||
3604 | static struct quick_file_names * | |
e4a48d9d | 3605 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3606 | { |
0186c6a7 DE |
3607 | /* This should never be called for TUs. */ |
3608 | gdb_assert (! this_cu->is_debug_types); | |
3609 | /* Nor type unit groups. */ | |
3610 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3611 | |
dee91e82 DE |
3612 | if (this_cu->v.quick->file_names != NULL) |
3613 | return this_cu->v.quick->file_names; | |
3614 | /* If we know there is no line data, no point in looking again. */ | |
3615 | if (this_cu->v.quick->no_file_data) | |
3616 | return NULL; | |
3617 | ||
0186c6a7 | 3618 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3619 | |
3620 | if (this_cu->v.quick->no_file_data) | |
3621 | return NULL; | |
3622 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3623 | } |
3624 | ||
3625 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3626 | real path for a given file name from the line table. */ |
2fdf6df6 | 3627 | |
9291a0cd | 3628 | static const char * |
7b9f3c50 DE |
3629 | dw2_get_real_path (struct objfile *objfile, |
3630 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3631 | { |
7b9f3c50 DE |
3632 | if (qfn->real_names == NULL) |
3633 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3634 | qfn->num_file_names, const char *); |
9291a0cd | 3635 | |
7b9f3c50 | 3636 | if (qfn->real_names[index] == NULL) |
14278e1f | 3637 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3638 | |
7b9f3c50 | 3639 | return qfn->real_names[index]; |
9291a0cd TT |
3640 | } |
3641 | ||
3642 | static struct symtab * | |
3643 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3644 | { | |
43f3e411 | 3645 | struct compunit_symtab *cust; |
9291a0cd | 3646 | int index; |
ae2de4f8 | 3647 | |
9291a0cd TT |
3648 | dw2_setup (objfile); |
3649 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3650 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3651 | if (cust == NULL) | |
3652 | return NULL; | |
3653 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3654 | } |
3655 | ||
7b9f3c50 DE |
3656 | /* Traversal function for dw2_forget_cached_source_info. */ |
3657 | ||
3658 | static int | |
3659 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3660 | { |
7b9f3c50 | 3661 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3662 | |
7b9f3c50 | 3663 | if (file_data->real_names) |
9291a0cd | 3664 | { |
7b9f3c50 | 3665 | int i; |
9291a0cd | 3666 | |
7b9f3c50 | 3667 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3668 | { |
7b9f3c50 DE |
3669 | xfree ((void*) file_data->real_names[i]); |
3670 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3671 | } |
3672 | } | |
7b9f3c50 DE |
3673 | |
3674 | return 1; | |
3675 | } | |
3676 | ||
3677 | static void | |
3678 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3679 | { | |
3680 | dw2_setup (objfile); | |
3681 | ||
3682 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3683 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3684 | } |
3685 | ||
f8eba3c6 TT |
3686 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3687 | the symtabs and calls the iterator. */ | |
3688 | ||
3689 | static int | |
3690 | dw2_map_expand_apply (struct objfile *objfile, | |
3691 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3692 | const char *name, const char *real_path, |
14bc53a8 | 3693 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3694 | { |
43f3e411 | 3695 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3696 | |
3697 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3698 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3699 | return 0; |
3700 | ||
3701 | /* This may expand more than one symtab, and we want to iterate over | |
3702 | all of them. */ | |
a0f42c21 | 3703 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3704 | |
14bc53a8 PA |
3705 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3706 | last_made, callback); | |
f8eba3c6 TT |
3707 | } |
3708 | ||
3709 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3710 | ||
14bc53a8 PA |
3711 | static bool |
3712 | dw2_map_symtabs_matching_filename | |
3713 | (struct objfile *objfile, const char *name, const char *real_path, | |
3714 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3715 | { |
3716 | int i; | |
c011a4f4 | 3717 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3718 | |
3719 | dw2_setup (objfile); | |
ae2de4f8 | 3720 | |
848e3e78 DE |
3721 | /* The rule is CUs specify all the files, including those used by |
3722 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3723 | |
848e3e78 | 3724 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3725 | { |
3726 | int j; | |
8832e7e3 | 3727 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3728 | struct quick_file_names *file_data; |
9291a0cd | 3729 | |
3d7bb9d9 | 3730 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3731 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3732 | continue; |
3733 | ||
e4a48d9d | 3734 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3735 | if (file_data == NULL) |
9291a0cd TT |
3736 | continue; |
3737 | ||
7b9f3c50 | 3738 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3739 | { |
7b9f3c50 | 3740 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3741 | const char *this_real_name; |
9291a0cd | 3742 | |
af529f8f | 3743 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3744 | { |
f5b95b50 | 3745 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3746 | callback)) |
3747 | return true; | |
288e77a7 | 3748 | continue; |
4aac40c8 | 3749 | } |
9291a0cd | 3750 | |
c011a4f4 DE |
3751 | /* Before we invoke realpath, which can get expensive when many |
3752 | files are involved, do a quick comparison of the basenames. */ | |
3753 | if (! basenames_may_differ | |
3754 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3755 | continue; | |
3756 | ||
da235a7c JK |
3757 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3758 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3759 | { |
da235a7c | 3760 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3761 | callback)) |
3762 | return true; | |
288e77a7 | 3763 | continue; |
da235a7c | 3764 | } |
9291a0cd | 3765 | |
da235a7c JK |
3766 | if (real_path != NULL) |
3767 | { | |
af529f8f JK |
3768 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3769 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3770 | if (this_real_name != NULL |
af529f8f | 3771 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3772 | { |
f5b95b50 | 3773 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3774 | callback)) |
3775 | return true; | |
288e77a7 | 3776 | continue; |
9291a0cd TT |
3777 | } |
3778 | } | |
3779 | } | |
3780 | } | |
3781 | ||
14bc53a8 | 3782 | return false; |
9291a0cd TT |
3783 | } |
3784 | ||
da51c347 DE |
3785 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3786 | ||
3787 | struct dw2_symtab_iterator | |
9291a0cd | 3788 | { |
da51c347 DE |
3789 | /* The internalized form of .gdb_index. */ |
3790 | struct mapped_index *index; | |
3791 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3792 | int want_specific_block; | |
3793 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3794 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3795 | int block_index; | |
3796 | /* The kind of symbol we're looking for. */ | |
3797 | domain_enum domain; | |
3798 | /* The list of CUs from the index entry of the symbol, | |
3799 | or NULL if not found. */ | |
3800 | offset_type *vec; | |
3801 | /* The next element in VEC to look at. */ | |
3802 | int next; | |
3803 | /* The number of elements in VEC, or zero if there is no match. */ | |
3804 | int length; | |
8943b874 DE |
3805 | /* Have we seen a global version of the symbol? |
3806 | If so we can ignore all further global instances. | |
3807 | This is to work around gold/15646, inefficient gold-generated | |
3808 | indices. */ | |
3809 | int global_seen; | |
da51c347 | 3810 | }; |
9291a0cd | 3811 | |
da51c347 DE |
3812 | /* Initialize the index symtab iterator ITER. |
3813 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3814 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3815 | |
9291a0cd | 3816 | static void |
da51c347 DE |
3817 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3818 | struct mapped_index *index, | |
3819 | int want_specific_block, | |
3820 | int block_index, | |
3821 | domain_enum domain, | |
3822 | const char *name) | |
3823 | { | |
3824 | iter->index = index; | |
3825 | iter->want_specific_block = want_specific_block; | |
3826 | iter->block_index = block_index; | |
3827 | iter->domain = domain; | |
3828 | iter->next = 0; | |
8943b874 | 3829 | iter->global_seen = 0; |
da51c347 DE |
3830 | |
3831 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3832 | iter->length = MAYBE_SWAP (*iter->vec); | |
3833 | else | |
3834 | { | |
3835 | iter->vec = NULL; | |
3836 | iter->length = 0; | |
3837 | } | |
3838 | } | |
3839 | ||
3840 | /* Return the next matching CU or NULL if there are no more. */ | |
3841 | ||
3842 | static struct dwarf2_per_cu_data * | |
3843 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3844 | { | |
3845 | for ( ; iter->next < iter->length; ++iter->next) | |
3846 | { | |
3847 | offset_type cu_index_and_attrs = | |
3848 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3849 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3850 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3851 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3852 | /* This value is only valid for index versions >= 7. */ | |
3853 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3854 | gdb_index_symbol_kind symbol_kind = | |
3855 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3856 | /* Only check the symbol attributes if they're present. | |
3857 | Indices prior to version 7 don't record them, | |
3858 | and indices >= 7 may elide them for certain symbols | |
3859 | (gold does this). */ | |
3860 | int attrs_valid = | |
3861 | (iter->index->version >= 7 | |
3862 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3863 | ||
3190f0c6 DE |
3864 | /* Don't crash on bad data. */ |
3865 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3866 | + dwarf2_per_objfile->n_type_units)) | |
3867 | { | |
3868 | complaint (&symfile_complaints, | |
3869 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3870 | " [in module %s]"), |
3871 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3872 | continue; |
3873 | } | |
3874 | ||
8832e7e3 | 3875 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3876 | |
da51c347 | 3877 | /* Skip if already read in. */ |
43f3e411 | 3878 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3879 | continue; |
3880 | ||
8943b874 DE |
3881 | /* Check static vs global. */ |
3882 | if (attrs_valid) | |
3883 | { | |
3884 | if (iter->want_specific_block | |
3885 | && want_static != is_static) | |
3886 | continue; | |
3887 | /* Work around gold/15646. */ | |
3888 | if (!is_static && iter->global_seen) | |
3889 | continue; | |
3890 | if (!is_static) | |
3891 | iter->global_seen = 1; | |
3892 | } | |
da51c347 DE |
3893 | |
3894 | /* Only check the symbol's kind if it has one. */ | |
3895 | if (attrs_valid) | |
3896 | { | |
3897 | switch (iter->domain) | |
3898 | { | |
3899 | case VAR_DOMAIN: | |
3900 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3901 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3902 | /* Some types are also in VAR_DOMAIN. */ | |
3903 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3904 | continue; | |
3905 | break; | |
3906 | case STRUCT_DOMAIN: | |
3907 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3908 | continue; | |
3909 | break; | |
3910 | case LABEL_DOMAIN: | |
3911 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3912 | continue; | |
3913 | break; | |
3914 | default: | |
3915 | break; | |
3916 | } | |
3917 | } | |
3918 | ||
3919 | ++iter->next; | |
3920 | return per_cu; | |
3921 | } | |
3922 | ||
3923 | return NULL; | |
3924 | } | |
3925 | ||
43f3e411 | 3926 | static struct compunit_symtab * |
da51c347 DE |
3927 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3928 | const char *name, domain_enum domain) | |
9291a0cd | 3929 | { |
43f3e411 | 3930 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3931 | struct mapped_index *index; |
3932 | ||
9291a0cd TT |
3933 | dw2_setup (objfile); |
3934 | ||
b5ec771e PA |
3935 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3936 | ||
156942c7 DE |
3937 | index = dwarf2_per_objfile->index_table; |
3938 | ||
da51c347 | 3939 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3940 | if (index) |
9291a0cd | 3941 | { |
da51c347 DE |
3942 | struct dw2_symtab_iterator iter; |
3943 | struct dwarf2_per_cu_data *per_cu; | |
3944 | ||
3945 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3946 | |
da51c347 | 3947 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3948 | { |
b2e2f908 | 3949 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3950 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3951 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3952 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3953 | |
b2e2f908 DE |
3954 | sym = block_find_symbol (block, name, domain, |
3955 | block_find_non_opaque_type_preferred, | |
3956 | &with_opaque); | |
3957 | ||
da51c347 DE |
3958 | /* Some caution must be observed with overloaded functions |
3959 | and methods, since the index will not contain any overload | |
3960 | information (but NAME might contain it). */ | |
da51c347 | 3961 | |
b2e2f908 | 3962 | if (sym != NULL |
b5ec771e | 3963 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
b2e2f908 DE |
3964 | return stab; |
3965 | if (with_opaque != NULL | |
b5ec771e | 3966 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
b2e2f908 | 3967 | stab_best = stab; |
da51c347 DE |
3968 | |
3969 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3970 | } |
3971 | } | |
9291a0cd | 3972 | |
da51c347 | 3973 | return stab_best; |
9291a0cd TT |
3974 | } |
3975 | ||
3976 | static void | |
3977 | dw2_print_stats (struct objfile *objfile) | |
3978 | { | |
e4a48d9d | 3979 | int i, total, count; |
9291a0cd TT |
3980 | |
3981 | dw2_setup (objfile); | |
e4a48d9d | 3982 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3983 | count = 0; |
e4a48d9d | 3984 | for (i = 0; i < total; ++i) |
9291a0cd | 3985 | { |
8832e7e3 | 3986 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3987 | |
43f3e411 | 3988 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3989 | ++count; |
3990 | } | |
e4a48d9d | 3991 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3992 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3993 | } | |
3994 | ||
779bd270 DE |
3995 | /* This dumps minimal information about the index. |
3996 | It is called via "mt print objfiles". | |
3997 | One use is to verify .gdb_index has been loaded by the | |
3998 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3999 | ||
9291a0cd TT |
4000 | static void |
4001 | dw2_dump (struct objfile *objfile) | |
4002 | { | |
779bd270 DE |
4003 | dw2_setup (objfile); |
4004 | gdb_assert (dwarf2_per_objfile->using_index); | |
4005 | printf_filtered (".gdb_index:"); | |
4006 | if (dwarf2_per_objfile->index_table != NULL) | |
4007 | { | |
4008 | printf_filtered (" version %d\n", | |
4009 | dwarf2_per_objfile->index_table->version); | |
4010 | } | |
4011 | else | |
4012 | printf_filtered (" faked for \"readnow\"\n"); | |
4013 | printf_filtered ("\n"); | |
9291a0cd TT |
4014 | } |
4015 | ||
4016 | static void | |
3189cb12 DE |
4017 | dw2_relocate (struct objfile *objfile, |
4018 | const struct section_offsets *new_offsets, | |
4019 | const struct section_offsets *delta) | |
9291a0cd TT |
4020 | { |
4021 | /* There's nothing to relocate here. */ | |
4022 | } | |
4023 | ||
4024 | static void | |
4025 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4026 | const char *func_name) | |
4027 | { | |
da51c347 DE |
4028 | struct mapped_index *index; |
4029 | ||
4030 | dw2_setup (objfile); | |
4031 | ||
4032 | index = dwarf2_per_objfile->index_table; | |
4033 | ||
4034 | /* index is NULL if OBJF_READNOW. */ | |
4035 | if (index) | |
4036 | { | |
4037 | struct dw2_symtab_iterator iter; | |
4038 | struct dwarf2_per_cu_data *per_cu; | |
4039 | ||
4040 | /* Note: It doesn't matter what we pass for block_index here. */ | |
4041 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
4042 | func_name); | |
4043 | ||
4044 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
4045 | dw2_instantiate_symtab (per_cu); | |
4046 | } | |
9291a0cd TT |
4047 | } |
4048 | ||
4049 | static void | |
4050 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4051 | { | |
4052 | int i; | |
4053 | ||
4054 | dw2_setup (objfile); | |
1fd400ff TT |
4055 | |
4056 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4057 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4058 | { |
8832e7e3 | 4059 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4060 | |
a0f42c21 | 4061 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4062 | } |
4063 | } | |
4064 | ||
4065 | static void | |
652a8996 JK |
4066 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4067 | const char *fullname) | |
9291a0cd TT |
4068 | { |
4069 | int i; | |
4070 | ||
4071 | dw2_setup (objfile); | |
d4637a04 DE |
4072 | |
4073 | /* We don't need to consider type units here. | |
4074 | This is only called for examining code, e.g. expand_line_sal. | |
4075 | There can be an order of magnitude (or more) more type units | |
4076 | than comp units, and we avoid them if we can. */ | |
4077 | ||
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_cutu (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 | { |
652a8996 JK |
4094 | const char *this_fullname = file_data->file_names[j]; |
4095 | ||
4096 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4097 | { |
a0f42c21 | 4098 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4099 | break; |
4100 | } | |
4101 | } | |
4102 | } | |
4103 | } | |
4104 | ||
9291a0cd | 4105 | static void |
ade7ed9e | 4106 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4107 | const char * name, domain_enum domain, |
ade7ed9e | 4108 | int global, |
40658b94 PH |
4109 | int (*callback) (struct block *, |
4110 | struct symbol *, void *), | |
b5ec771e | 4111 | void *data, symbol_name_match_type match, |
2edb89d3 | 4112 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4113 | { |
40658b94 | 4114 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4115 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4116 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4117 | } |
4118 | ||
b5ec771e PA |
4119 | /* Symbol name matcher for .gdb_index names. |
4120 | ||
4121 | Symbol names in .gdb_index have a few particularities: | |
4122 | ||
4123 | - There's no indication of which is the language of each symbol. | |
4124 | ||
4125 | Since each language has its own symbol name matching algorithm, | |
4126 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4127 | each symbol against all languages. This would be a potential |
4128 | performance problem if it were not mitigated by the | |
4129 | mapped_index::name_components lookup table, which significantly | |
4130 | reduces the number of times we need to call into this matcher, | |
4131 | making it a non-issue. | |
b5ec771e PA |
4132 | |
4133 | - Symbol names in the index have no overload (parameter) | |
4134 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4135 | appear as "foo" in the index, for example. | |
4136 | ||
4137 | This means that the lookup names passed to the symbol name | |
4138 | matcher functions must have no parameter information either | |
4139 | because (e.g.) symbol search name "foo" does not match | |
4140 | lookup-name "foo(int)" [while swapping search name for lookup | |
4141 | name would match]. | |
4142 | */ | |
4143 | class gdb_index_symbol_name_matcher | |
4144 | { | |
4145 | public: | |
4146 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4147 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4148 | ||
4149 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4150 | Returns true if any matcher matches. */ | |
4151 | bool matches (const char *symbol_name); | |
4152 | ||
4153 | private: | |
4154 | /* A reference to the lookup name we're matching against. */ | |
4155 | const lookup_name_info &m_lookup_name; | |
4156 | ||
4157 | /* A vector holding all the different symbol name matchers, for all | |
4158 | languages. */ | |
4159 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4160 | }; | |
4161 | ||
4162 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4163 | (const lookup_name_info &lookup_name) | |
4164 | : m_lookup_name (lookup_name) | |
4165 | { | |
4166 | /* Prepare the vector of comparison functions upfront, to avoid | |
4167 | doing the same work for each symbol. Care is taken to avoid | |
4168 | matching with the same matcher more than once if/when multiple | |
4169 | languages use the same matcher function. */ | |
4170 | auto &matchers = m_symbol_name_matcher_funcs; | |
4171 | matchers.reserve (nr_languages); | |
4172 | ||
4173 | matchers.push_back (default_symbol_name_matcher); | |
4174 | ||
4175 | for (int i = 0; i < nr_languages; i++) | |
4176 | { | |
4177 | const language_defn *lang = language_def ((enum language) i); | |
4178 | if (lang->la_get_symbol_name_matcher != NULL) | |
4179 | { | |
4180 | symbol_name_matcher_ftype *name_matcher | |
4181 | = lang->la_get_symbol_name_matcher (m_lookup_name); | |
4182 | ||
4183 | /* Don't insert the same comparison routine more than once. | |
4184 | Note that we do this linear walk instead of a cheaper | |
4185 | sorted insert, or use a std::set or something like that, | |
4186 | because relative order of function addresses is not | |
4187 | stable. This is not a problem in practice because the | |
4188 | number of supported languages is low, and the cost here | |
4189 | is tiny compared to the number of searches we'll do | |
4190 | afterwards using this object. */ | |
4191 | if (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4192 | == matchers.end ()) | |
4193 | matchers.push_back (name_matcher); | |
4194 | } | |
4195 | } | |
4196 | } | |
4197 | ||
4198 | bool | |
4199 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4200 | { | |
4201 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4202 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4203 | return true; | |
4204 | ||
4205 | return false; | |
4206 | } | |
4207 | ||
e1ef7d7a PA |
4208 | /* Starting from a search name, return the string that finds the upper |
4209 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4210 | list. Returns the empty string to indicate that the upper bound is | |
4211 | the end of the list. */ | |
4212 | ||
4213 | static std::string | |
4214 | make_sort_after_prefix_name (const char *search_name) | |
4215 | { | |
4216 | /* When looking to complete "func", we find the upper bound of all | |
4217 | symbols that start with "func" by looking for where we'd insert | |
4218 | the closest string that would follow "func" in lexicographical | |
4219 | order. Usually, that's "func"-with-last-character-incremented, | |
4220 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4221 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4222 | Especially mind the 0xff character, which is a valid character in | |
4223 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4224 | rule out compilers allowing it in identifiers. Note that | |
4225 | conveniently, strcmp/strcasecmp are specified to compare | |
4226 | characters interpreted as unsigned char. So what we do is treat | |
4227 | the whole string as a base 256 number composed of a sequence of | |
4228 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4229 | to 0, and carries 1 to the following more-significant position. | |
4230 | If the very first character in SEARCH_NAME ends up incremented | |
4231 | and carries/overflows, then the upper bound is the end of the | |
4232 | list. The string after the empty string is also the empty | |
4233 | string. | |
4234 | ||
4235 | Some examples of this operation: | |
4236 | ||
4237 | SEARCH_NAME => "+1" RESULT | |
4238 | ||
4239 | "abc" => "abd" | |
4240 | "ab\xff" => "ac" | |
4241 | "\xff" "a" "\xff" => "\xff" "b" | |
4242 | "\xff" => "" | |
4243 | "\xff\xff" => "" | |
4244 | "" => "" | |
4245 | ||
4246 | Then, with these symbols for example: | |
4247 | ||
4248 | func | |
4249 | func1 | |
4250 | fund | |
4251 | ||
4252 | completing "func" looks for symbols between "func" and | |
4253 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4254 | which finds "func" and "func1", but not "fund". | |
4255 | ||
4256 | And with: | |
4257 | ||
4258 | funcÿ (Latin1 'ÿ' [0xff]) | |
4259 | funcÿ1 | |
4260 | fund | |
4261 | ||
4262 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4263 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4264 | ||
4265 | And with: | |
4266 | ||
4267 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4268 | ÿÿ1 | |
4269 | ||
4270 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4271 | the end of the list. | |
4272 | */ | |
4273 | std::string after = search_name; | |
4274 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4275 | after.pop_back (); | |
4276 | if (!after.empty ()) | |
4277 | after.back () = (unsigned char) after.back () + 1; | |
4278 | return after; | |
4279 | } | |
4280 | ||
5c58de74 | 4281 | /* See declaration. */ |
61d96d7e | 4282 | |
5c58de74 PA |
4283 | std::pair<std::vector<name_component>::const_iterator, |
4284 | std::vector<name_component>::const_iterator> | |
4285 | mapped_index::find_name_components_bounds | |
4286 | (const lookup_name_info &lookup_name_without_params) const | |
3f563c84 | 4287 | { |
5c58de74 PA |
4288 | auto *name_cmp |
4289 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 PA |
4290 | |
4291 | const char *cplus | |
c62446b1 | 4292 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4293 | |
3f563c84 PA |
4294 | /* Comparison function object for lower_bound that matches against a |
4295 | given symbol name. */ | |
4296 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4297 | const char *name) | |
4298 | { | |
5c58de74 | 4299 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4300 | const char *elem_name = elem_qualified + elem.name_offset; |
4301 | return name_cmp (elem_name, name) < 0; | |
4302 | }; | |
4303 | ||
4304 | /* Comparison function object for upper_bound that matches against a | |
4305 | given symbol name. */ | |
4306 | auto lookup_compare_upper = [&] (const char *name, | |
4307 | const name_component &elem) | |
4308 | { | |
5c58de74 | 4309 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4310 | const char *elem_name = elem_qualified + elem.name_offset; |
4311 | return name_cmp (name, elem_name) < 0; | |
4312 | }; | |
4313 | ||
5c58de74 PA |
4314 | auto begin = this->name_components.begin (); |
4315 | auto end = this->name_components.end (); | |
3f563c84 PA |
4316 | |
4317 | /* Find the lower bound. */ | |
4318 | auto lower = [&] () | |
4319 | { | |
5c58de74 | 4320 | if (lookup_name_without_params.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4321 | return begin; |
4322 | else | |
4323 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4324 | } (); | |
4325 | ||
4326 | /* Find the upper bound. */ | |
4327 | auto upper = [&] () | |
4328 | { | |
5c58de74 | 4329 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4330 | { |
e1ef7d7a PA |
4331 | /* In completion mode, we want UPPER to point past all |
4332 | symbols names that have the same prefix. I.e., with | |
4333 | these symbols, and completing "func": | |
4334 | ||
4335 | function << lower bound | |
4336 | function1 | |
4337 | other_function << upper bound | |
4338 | ||
4339 | We find the upper bound by looking for the insertion | |
4340 | point of "func"-with-last-character-incremented, | |
4341 | i.e. "fund". */ | |
4342 | std::string after = make_sort_after_prefix_name (cplus); | |
4343 | if (after.empty ()) | |
3f563c84 | 4344 | return end; |
e6b2f5ef PA |
4345 | return std::lower_bound (lower, end, after.c_str (), |
4346 | lookup_compare_lower); | |
3f563c84 PA |
4347 | } |
4348 | else | |
4349 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4350 | } (); | |
4351 | ||
5c58de74 PA |
4352 | return {lower, upper}; |
4353 | } | |
4354 | ||
4355 | /* See declaration. */ | |
4356 | ||
4357 | void | |
4358 | mapped_index::build_name_components () | |
4359 | { | |
4360 | if (!this->name_components.empty ()) | |
4361 | return; | |
4362 | ||
4363 | this->name_components_casing = case_sensitivity; | |
4364 | auto *name_cmp | |
4365 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4366 | ||
4367 | /* The code below only knows how to break apart components of C++ | |
4368 | symbol names (and other languages that use '::' as | |
4369 | namespace/module separator). If we add support for wild matching | |
4370 | to some language that uses some other operator (E.g., Ada, Go and | |
4371 | D use '.'), then we'll need to try splitting the symbol name | |
4372 | according to that language too. Note that Ada does support wild | |
4373 | matching, but doesn't currently support .gdb_index. */ | |
4374 | for (size_t iter = 0; iter < this->symbol_table_slots; ++iter) | |
4375 | { | |
4376 | offset_type idx = 2 * iter; | |
4377 | ||
4378 | if (this->symbol_table[idx] == 0 | |
4379 | && this->symbol_table[idx + 1] == 0) | |
4380 | continue; | |
4381 | ||
4382 | const char *name = this->symbol_name_at (idx); | |
4383 | ||
4384 | /* Add each name component to the name component table. */ | |
4385 | unsigned int previous_len = 0; | |
4386 | for (unsigned int current_len = cp_find_first_component (name); | |
4387 | name[current_len] != '\0'; | |
4388 | current_len += cp_find_first_component (name + current_len)) | |
4389 | { | |
4390 | gdb_assert (name[current_len] == ':'); | |
4391 | this->name_components.push_back ({previous_len, idx}); | |
4392 | /* Skip the '::'. */ | |
4393 | current_len += 2; | |
4394 | previous_len = current_len; | |
4395 | } | |
4396 | this->name_components.push_back ({previous_len, idx}); | |
4397 | } | |
4398 | ||
4399 | /* Sort name_components elements by name. */ | |
4400 | auto name_comp_compare = [&] (const name_component &left, | |
4401 | const name_component &right) | |
4402 | { | |
4403 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4404 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4405 | ||
4406 | const char *left_name = left_qualified + left.name_offset; | |
4407 | const char *right_name = right_qualified + right.name_offset; | |
4408 | ||
4409 | return name_cmp (left_name, right_name) < 0; | |
4410 | }; | |
4411 | ||
4412 | std::sort (this->name_components.begin (), | |
4413 | this->name_components.end (), | |
4414 | name_comp_compare); | |
4415 | } | |
4416 | ||
4417 | /* Helper for dw2_expand_symtabs_matching that works with a | |
4418 | mapped_index instead of the containing objfile. This is split to a | |
4419 | separate function in order to be able to unit test the | |
4420 | name_components matching using a mock mapped_index. For each | |
4421 | symbol name that matches, calls MATCH_CALLBACK, passing it the | |
4422 | symbol's index in the mapped_index symbol table. */ | |
4423 | ||
4424 | static void | |
4425 | dw2_expand_symtabs_matching_symbol | |
4426 | (mapped_index &index, | |
4427 | const lookup_name_info &lookup_name_in, | |
4428 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4429 | enum search_domain kind, | |
4430 | gdb::function_view<void (offset_type)> match_callback) | |
4431 | { | |
4432 | lookup_name_info lookup_name_without_params | |
4433 | = lookup_name_in.make_ignore_params (); | |
4434 | gdb_index_symbol_name_matcher lookup_name_matcher | |
4435 | (lookup_name_without_params); | |
4436 | ||
4437 | /* Build the symbol name component sorted vector, if we haven't | |
4438 | yet. */ | |
4439 | index.build_name_components (); | |
4440 | ||
4441 | auto bounds = index.find_name_components_bounds (lookup_name_without_params); | |
4442 | ||
3f563c84 PA |
4443 | /* Now for each symbol name in range, check to see if we have a name |
4444 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4445 | ||
4446 | /* The same symbol may appear more than once in the range though. | |
4447 | E.g., if we're looking for symbols that complete "w", and we have | |
4448 | a symbol named "w1::w2", we'll find the two name components for | |
4449 | that same symbol in the range. To be sure we only call the | |
4450 | callback once per symbol, we first collect the symbol name | |
4451 | indexes that matched in a temporary vector and ignore | |
4452 | duplicates. */ | |
4453 | std::vector<offset_type> matches; | |
5c58de74 | 4454 | matches.reserve (std::distance (bounds.first, bounds.second)); |
3f563c84 | 4455 | |
5c58de74 | 4456 | for (; bounds.first != bounds.second; ++bounds.first) |
3f563c84 | 4457 | { |
5c58de74 | 4458 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
3f563c84 PA |
4459 | |
4460 | if (!lookup_name_matcher.matches (qualified) | |
4461 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4462 | continue; |
4463 | ||
5c58de74 | 4464 | matches.push_back (bounds.first->idx); |
3f563c84 PA |
4465 | } |
4466 | ||
4467 | std::sort (matches.begin (), matches.end ()); | |
4468 | ||
4469 | /* Finally call the callback, once per match. */ | |
4470 | ULONGEST prev = -1; | |
4471 | for (offset_type idx : matches) | |
4472 | { | |
4473 | if (prev != idx) | |
4474 | { | |
4475 | match_callback (idx); | |
4476 | prev = idx; | |
4477 | } | |
4478 | } | |
4479 | ||
4480 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4481 | (offset_type)-1 are both possible values. */ | |
4482 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4483 | } | |
4484 | ||
c62446b1 PA |
4485 | #if GDB_SELF_TEST |
4486 | ||
4487 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4488 | ||
4489 | /* A wrapper around mapped_index that builds a mock mapped_index, from | |
4490 | the symbol list passed as parameter to the constructor. */ | |
4491 | class mock_mapped_index | |
4492 | { | |
4493 | public: | |
4494 | template<size_t N> | |
4495 | mock_mapped_index (const char *(&symbols)[N]) | |
4496 | : mock_mapped_index (symbols, N) | |
4497 | {} | |
4498 | ||
4499 | /* Access the built index. */ | |
4500 | mapped_index &index () | |
4501 | { return m_index; } | |
4502 | ||
4503 | /* Disable copy. */ | |
4504 | mock_mapped_index(const mock_mapped_index &) = delete; | |
4505 | void operator= (const mock_mapped_index &) = delete; | |
4506 | ||
4507 | private: | |
4508 | mock_mapped_index (const char **symbols, size_t symbols_size) | |
4509 | { | |
4510 | /* No string can live at offset zero. Add a dummy entry. */ | |
4511 | obstack_grow_str0 (&m_constant_pool, ""); | |
4512 | ||
4513 | for (size_t i = 0; i < symbols_size; i++) | |
4514 | { | |
4515 | const char *sym = symbols[i]; | |
4516 | size_t offset = obstack_object_size (&m_constant_pool); | |
4517 | obstack_grow_str0 (&m_constant_pool, sym); | |
4518 | m_symbol_table.push_back (offset); | |
4519 | m_symbol_table.push_back (0); | |
4520 | }; | |
4521 | ||
4522 | m_index.constant_pool = (const char *) obstack_base (&m_constant_pool); | |
4523 | m_index.symbol_table = m_symbol_table.data (); | |
4524 | m_index.symbol_table_slots = m_symbol_table.size () / 2; | |
4525 | } | |
4526 | ||
4527 | public: | |
4528 | /* The built mapped_index. */ | |
4529 | mapped_index m_index{}; | |
4530 | ||
4531 | /* The storage that the built mapped_index uses for symbol and | |
4532 | constant pool tables. */ | |
4533 | std::vector<offset_type> m_symbol_table; | |
4534 | auto_obstack m_constant_pool; | |
4535 | }; | |
4536 | ||
4537 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4538 | string, to pass to print routines. */ | |
4539 | ||
4540 | static const char * | |
4541 | string_or_null (const char *str) | |
4542 | { | |
4543 | return str != NULL ? str : "<null>"; | |
4544 | } | |
4545 | ||
4546 | /* Check if a lookup_name_info built from | |
4547 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4548 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4549 | matching order. If no match expected, then an empty list is | |
4550 | specified. Returns true on success. On failure prints a warning | |
4551 | indicating the file:line that failed, and returns false. */ | |
4552 | ||
4553 | static bool | |
4554 | check_match (const char *file, int line, | |
4555 | mock_mapped_index &mock_index, | |
4556 | const char *name, symbol_name_match_type match_type, | |
4557 | bool completion_mode, | |
4558 | std::initializer_list<const char *> expected_list) | |
4559 | { | |
4560 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4561 | ||
4562 | bool matched = true; | |
4563 | ||
4564 | auto mismatch = [&] (const char *expected_str, | |
4565 | const char *got) | |
4566 | { | |
4567 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4568 | "expected=\"%s\", got=\"%s\"\n"), | |
4569 | file, line, | |
4570 | (match_type == symbol_name_match_type::FULL | |
4571 | ? "FULL" : "WILD"), | |
4572 | name, string_or_null (expected_str), string_or_null (got)); | |
4573 | matched = false; | |
4574 | }; | |
4575 | ||
4576 | auto expected_it = expected_list.begin (); | |
4577 | auto expected_end = expected_list.end (); | |
4578 | ||
4579 | dw2_expand_symtabs_matching_symbol (mock_index.index (), lookup_name, | |
4580 | NULL, ALL_DOMAIN, | |
4581 | [&] (offset_type idx) | |
4582 | { | |
4583 | const char *matched_name = mock_index.index ().symbol_name_at (idx); | |
4584 | const char *expected_str | |
4585 | = expected_it == expected_end ? NULL : *expected_it++; | |
4586 | ||
4587 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4588 | mismatch (expected_str, matched_name); | |
4589 | }); | |
4590 | ||
4591 | const char *expected_str | |
4592 | = expected_it == expected_end ? NULL : *expected_it++; | |
4593 | if (expected_str != NULL) | |
4594 | mismatch (expected_str, NULL); | |
4595 | ||
4596 | return matched; | |
4597 | } | |
4598 | ||
4599 | /* The symbols added to the mock mapped_index for testing (in | |
4600 | canonical form). */ | |
4601 | static const char *test_symbols[] = { | |
4602 | "function", | |
4603 | "std::bar", | |
4604 | "std::zfunction", | |
4605 | "std::zfunction2", | |
4606 | "w1::w2", | |
4607 | "ns::foo<char*>", | |
4608 | "ns::foo<int>", | |
4609 | "ns::foo<long>", | |
a20714ff PA |
4610 | "ns2::tmpl<int>::foo2", |
4611 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4612 | |
e1ef7d7a PA |
4613 | /* These are used to check that the increment-last-char in the |
4614 | matching algorithm for completion doesn't match "t1_fund" when | |
4615 | completing "t1_func". */ | |
4616 | "t1_func", | |
4617 | "t1_func1", | |
4618 | "t1_fund", | |
4619 | "t1_fund1", | |
4620 | ||
4621 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4622 | cp-name-parser understands this as a single identifier ("função" | |
4623 | is "function" in PT). */ | |
4624 | u8"u8função", | |
4625 | ||
4626 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4627 | "yfunc\377", | |
4628 | ||
4629 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4630 | "\377", | |
4631 | "\377\377123", | |
4632 | ||
c62446b1 PA |
4633 | /* A name with all sorts of complications. Starts with "z" to make |
4634 | it easier for the completion tests below. */ | |
4635 | #define Z_SYM_NAME \ | |
4636 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4637 | "::tuple<(anonymous namespace)::ui*, " \ | |
4638 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4639 | ||
4640 | Z_SYM_NAME | |
4641 | }; | |
4642 | ||
5c58de74 PA |
4643 | /* Returns true if the mapped_index::find_name_component_bounds method |
4644 | finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, in | |
4645 | completion mode. */ | |
4646 | ||
4647 | static bool | |
4648 | check_find_bounds_finds (mapped_index &index, | |
4649 | const char *search_name, | |
4650 | gdb::array_view<const char *> expected_syms) | |
4651 | { | |
4652 | lookup_name_info lookup_name (search_name, | |
4653 | symbol_name_match_type::FULL, true); | |
4654 | ||
4655 | auto bounds = index.find_name_components_bounds (lookup_name); | |
4656 | ||
4657 | size_t distance = std::distance (bounds.first, bounds.second); | |
4658 | if (distance != expected_syms.size ()) | |
4659 | return false; | |
4660 | ||
4661 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4662 | { | |
4663 | auto nc_elem = bounds.first + exp_elem; | |
4664 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4665 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4666 | return false; | |
4667 | } | |
4668 | ||
4669 | return true; | |
4670 | } | |
4671 | ||
4672 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4673 | method. */ | |
4674 | ||
c62446b1 | 4675 | static void |
5c58de74 PA |
4676 | test_mapped_index_find_name_component_bounds () |
4677 | { | |
4678 | mock_mapped_index mock_index (test_symbols); | |
4679 | ||
4680 | mock_index.index ().build_name_components (); | |
4681 | ||
4682 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4683 | method in completion mode. */ | |
4684 | { | |
4685 | static const char *expected_syms[] = { | |
4686 | "t1_func", | |
4687 | "t1_func1", | |
5c58de74 PA |
4688 | }; |
4689 | ||
4690 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4691 | "t1_func", expected_syms)); | |
4692 | } | |
4693 | ||
4694 | /* Check that the increment-last-char in the name matching algorithm | |
4695 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4696 | { | |
4697 | static const char *expected_syms1[] = { | |
4698 | "\377", | |
4699 | "\377\377123", | |
4700 | }; | |
4701 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4702 | "\377", expected_syms1)); | |
4703 | ||
4704 | static const char *expected_syms2[] = { | |
4705 | "\377\377123", | |
4706 | }; | |
4707 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4708 | "\377\377", expected_syms2)); | |
4709 | } | |
4710 | } | |
4711 | ||
4712 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4713 | ||
4714 | static void | |
4715 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4716 | { |
4717 | mock_mapped_index mock_index (test_symbols); | |
4718 | ||
4719 | /* We let all tests run until the end even if some fails, for debug | |
4720 | convenience. */ | |
4721 | bool any_mismatch = false; | |
4722 | ||
4723 | /* Create the expected symbols list (an initializer_list). Needed | |
4724 | because lists have commas, and we need to pass them to CHECK, | |
4725 | which is a macro. */ | |
4726 | #define EXPECT(...) { __VA_ARGS__ } | |
4727 | ||
4728 | /* Wrapper for check_match that passes down the current | |
4729 | __FILE__/__LINE__. */ | |
4730 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4731 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4732 | mock_index, \ | |
4733 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4734 | EXPECTED_LIST) | |
4735 | ||
4736 | /* Identity checks. */ | |
4737 | for (const char *sym : test_symbols) | |
4738 | { | |
4739 | /* Should be able to match all existing symbols. */ | |
4740 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4741 | EXPECT (sym)); | |
4742 | ||
4743 | /* Should be able to match all existing symbols with | |
4744 | parameters. */ | |
4745 | std::string with_params = std::string (sym) + "(int)"; | |
4746 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4747 | EXPECT (sym)); | |
4748 | ||
4749 | /* Should be able to match all existing symbols with | |
4750 | parameters and qualifiers. */ | |
4751 | with_params = std::string (sym) + " ( int ) const"; | |
4752 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4753 | EXPECT (sym)); | |
4754 | ||
4755 | /* This should really find sym, but cp-name-parser.y doesn't | |
4756 | know about lvalue/rvalue qualifiers yet. */ | |
4757 | with_params = std::string (sym) + " ( int ) &&"; | |
4758 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4759 | {}); | |
4760 | } | |
4761 | ||
e1ef7d7a PA |
4762 | /* Check that the name matching algorithm for completion doesn't get |
4763 | confused with Latin1 'ÿ' / 0xff. */ | |
4764 | { | |
4765 | static const char str[] = "\377"; | |
4766 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4767 | EXPECT ("\377", "\377\377123")); | |
4768 | } | |
4769 | ||
4770 | /* Check that the increment-last-char in the matching algorithm for | |
4771 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4772 | { | |
4773 | static const char str[] = "t1_func"; | |
4774 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4775 | EXPECT ("t1_func", "t1_func1")); | |
4776 | } | |
4777 | ||
c62446b1 PA |
4778 | /* Check that completion mode works at each prefix of the expected |
4779 | symbol name. */ | |
4780 | { | |
4781 | static const char str[] = "function(int)"; | |
4782 | size_t len = strlen (str); | |
4783 | std::string lookup; | |
4784 | ||
4785 | for (size_t i = 1; i < len; i++) | |
4786 | { | |
4787 | lookup.assign (str, i); | |
4788 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4789 | EXPECT ("function")); | |
4790 | } | |
4791 | } | |
4792 | ||
4793 | /* While "w" is a prefix of both components, the match function | |
4794 | should still only be called once. */ | |
4795 | { | |
4796 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4797 | EXPECT ("w1::w2")); | |
a20714ff PA |
4798 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4799 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4800 | } |
4801 | ||
4802 | /* Same, with a "complicated" symbol. */ | |
4803 | { | |
4804 | static const char str[] = Z_SYM_NAME; | |
4805 | size_t len = strlen (str); | |
4806 | std::string lookup; | |
4807 | ||
4808 | for (size_t i = 1; i < len; i++) | |
4809 | { | |
4810 | lookup.assign (str, i); | |
4811 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4812 | EXPECT (Z_SYM_NAME)); | |
4813 | } | |
4814 | } | |
4815 | ||
4816 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4817 | { | |
4818 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4819 | {}); | |
4820 | } | |
4821 | ||
4822 | /* A complete symbol with parameters matches any overload, since the | |
4823 | index has no overload info. */ | |
4824 | { | |
4825 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4826 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4827 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4828 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4829 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4830 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4831 | } |
4832 | ||
4833 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4834 | template argument list. */ | |
4835 | { | |
4836 | static const char expected[] = "ns::foo<int>"; | |
4837 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4838 | EXPECT (expected)); | |
a20714ff PA |
4839 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4840 | EXPECT (expected)); | |
c62446b1 PA |
4841 | } |
4842 | ||
4843 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4844 | template argument list that includes a pointer. */ | |
4845 | { | |
4846 | static const char expected[] = "ns::foo<char*>"; | |
4847 | /* Try both completion and non-completion modes. */ | |
4848 | static const bool completion_mode[2] = {false, true}; | |
4849 | for (size_t i = 0; i < 2; i++) | |
4850 | { | |
4851 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4852 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4853 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4854 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4855 | |
4856 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4857 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4858 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4859 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4860 | } |
4861 | } | |
4862 | ||
4863 | { | |
4864 | /* Check method qualifiers are ignored. */ | |
4865 | static const char expected[] = "ns::foo<char*>"; | |
4866 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4867 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4868 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4869 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4870 | CHECK_MATCH ("foo < char * > ( int ) const", |
4871 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4872 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4873 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4874 | } |
4875 | ||
4876 | /* Test lookup names that don't match anything. */ | |
4877 | { | |
a20714ff PA |
4878 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4879 | {}); | |
4880 | ||
c62446b1 PA |
4881 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4882 | {}); | |
4883 | } | |
4884 | ||
a20714ff PA |
4885 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4886 | which should not be confused with a parameter list. */ | |
4887 | { | |
4888 | static const char *syms[] = { | |
4889 | "A::B::C", | |
4890 | "B::C", | |
4891 | "C", | |
4892 | "A :: B :: C ( int )", | |
4893 | "B :: C ( int )", | |
4894 | "C ( int )", | |
4895 | }; | |
4896 | ||
4897 | for (const char *s : syms) | |
4898 | { | |
4899 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4900 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4901 | } | |
4902 | } | |
4903 | ||
4904 | { | |
4905 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4906 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4907 | EXPECT (expected)); | |
4908 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4909 | EXPECT (expected)); | |
4910 | } | |
4911 | ||
c62446b1 PA |
4912 | SELF_CHECK (!any_mismatch); |
4913 | ||
4914 | #undef EXPECT | |
4915 | #undef CHECK_MATCH | |
4916 | } | |
4917 | ||
5c58de74 PA |
4918 | static void |
4919 | run_test () | |
4920 | { | |
4921 | test_mapped_index_find_name_component_bounds (); | |
4922 | test_dw2_expand_symtabs_matching_symbol (); | |
4923 | } | |
4924 | ||
c62446b1 PA |
4925 | }} // namespace selftests::dw2_expand_symtabs_matching |
4926 | ||
4927 | #endif /* GDB_SELF_TEST */ | |
4928 | ||
3f563c84 PA |
4929 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4930 | matched, to expand corresponding CUs that were marked. IDX is the | |
4931 | index of the symbol name that matched. */ | |
4932 | ||
4933 | static void | |
4934 | dw2_expand_marked_cus | |
4935 | (mapped_index &index, offset_type idx, | |
4936 | struct objfile *objfile, | |
4937 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4938 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4939 | search_domain kind) | |
4940 | { | |
4941 | const char *name; | |
4942 | offset_type *vec, vec_len, vec_idx; | |
4943 | bool global_seen = false; | |
4944 | ||
61920122 PA |
4945 | vec = (offset_type *) (index.constant_pool |
4946 | + MAYBE_SWAP (index.symbol_table[idx + 1])); | |
4947 | vec_len = MAYBE_SWAP (vec[0]); | |
4948 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4949 | { | |
4950 | struct dwarf2_per_cu_data *per_cu; | |
4951 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); | |
4952 | /* This value is only valid for index versions >= 7. */ | |
4953 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4954 | gdb_index_symbol_kind symbol_kind = | |
4955 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4956 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4957 | /* Only check the symbol attributes if they're present. | |
4958 | Indices prior to version 7 don't record them, | |
4959 | and indices >= 7 may elide them for certain symbols | |
4960 | (gold does this). */ | |
4961 | int attrs_valid = | |
4962 | (index.version >= 7 | |
4963 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4964 | ||
4965 | /* Work around gold/15646. */ | |
4966 | if (attrs_valid) | |
9291a0cd | 4967 | { |
61920122 PA |
4968 | if (!is_static && global_seen) |
4969 | continue; | |
4970 | if (!is_static) | |
4971 | global_seen = true; | |
4972 | } | |
3190f0c6 | 4973 | |
61920122 PA |
4974 | /* Only check the symbol's kind if it has one. */ |
4975 | if (attrs_valid) | |
4976 | { | |
4977 | switch (kind) | |
8943b874 | 4978 | { |
61920122 PA |
4979 | case VARIABLES_DOMAIN: |
4980 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4981 | continue; | |
4982 | break; | |
4983 | case FUNCTIONS_DOMAIN: | |
4984 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4985 | continue; |
61920122 PA |
4986 | break; |
4987 | case TYPES_DOMAIN: | |
4988 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4989 | continue; | |
4990 | break; | |
4991 | default: | |
4992 | break; | |
8943b874 | 4993 | } |
61920122 | 4994 | } |
8943b874 | 4995 | |
61920122 PA |
4996 | /* Don't crash on bad data. */ |
4997 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4998 | + dwarf2_per_objfile->n_type_units)) | |
4999 | { | |
5000 | complaint (&symfile_complaints, | |
5001 | _(".gdb_index entry has bad CU index" | |
5002 | " [in module %s]"), objfile_name (objfile)); | |
5003 | continue; | |
5004 | } | |
5005 | ||
5006 | per_cu = dw2_get_cutu (cu_index); | |
5007 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
5008 | { | |
5009 | int symtab_was_null = | |
5010 | (per_cu->v.quick->compunit_symtab == NULL); | |
5011 | ||
5012 | dw2_instantiate_symtab (per_cu); | |
5013 | ||
5014 | if (expansion_notify != NULL | |
5015 | && symtab_was_null | |
5016 | && per_cu->v.quick->compunit_symtab != NULL) | |
5017 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
5018 | } | |
5019 | } | |
5020 | } | |
5021 | ||
5022 | static void | |
5023 | dw2_expand_symtabs_matching | |
5024 | (struct objfile *objfile, | |
5025 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5026 | const lookup_name_info &lookup_name, | |
5027 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5028 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5029 | enum search_domain kind) | |
5030 | { | |
5031 | int i; | |
5032 | offset_type iter; | |
5033 | ||
5034 | dw2_setup (objfile); | |
5035 | ||
5036 | /* index_table is NULL if OBJF_READNOW. */ | |
5037 | if (!dwarf2_per_objfile->index_table) | |
5038 | return; | |
5039 | ||
5040 | if (file_matcher != NULL) | |
5041 | { | |
5042 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
5043 | htab_eq_pointer, | |
5044 | NULL, xcalloc, xfree)); | |
5045 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
5046 | htab_eq_pointer, | |
5047 | NULL, xcalloc, xfree)); | |
5048 | ||
5049 | /* The rule is CUs specify all the files, including those used by | |
5050 | any TU, so there's no need to scan TUs here. */ | |
5051 | ||
5052 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5053 | { | |
5054 | int j; | |
5055 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5056 | struct quick_file_names *file_data; | |
5057 | void **slot; | |
5058 | ||
5059 | QUIT; | |
5060 | ||
5061 | per_cu->v.quick->mark = 0; | |
156942c7 | 5062 | |
61920122 PA |
5063 | /* We only need to look at symtabs not already expanded. */ |
5064 | if (per_cu->v.quick->compunit_symtab) | |
5065 | continue; | |
5066 | ||
5067 | file_data = dw2_get_file_names (per_cu); | |
5068 | if (file_data == NULL) | |
5069 | continue; | |
5070 | ||
5071 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5072 | continue; | |
5073 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
3190f0c6 | 5074 | { |
61920122 | 5075 | per_cu->v.quick->mark = 1; |
3190f0c6 DE |
5076 | continue; |
5077 | } | |
5078 | ||
61920122 | 5079 | for (j = 0; j < file_data->num_file_names; ++j) |
276d885b | 5080 | { |
61920122 | 5081 | const char *this_real_name; |
276d885b | 5082 | |
61920122 PA |
5083 | if (file_matcher (file_data->file_names[j], false)) |
5084 | { | |
5085 | per_cu->v.quick->mark = 1; | |
5086 | break; | |
5087 | } | |
5088 | ||
5089 | /* Before we invoke realpath, which can get expensive when many | |
5090 | files are involved, do a quick comparison of the basenames. */ | |
5091 | if (!basenames_may_differ | |
5092 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5093 | true)) | |
5094 | continue; | |
276d885b | 5095 | |
61920122 PA |
5096 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
5097 | if (file_matcher (this_real_name, false)) | |
276d885b | 5098 | { |
61920122 PA |
5099 | per_cu->v.quick->mark = 1; |
5100 | break; | |
276d885b GB |
5101 | } |
5102 | } | |
61920122 PA |
5103 | |
5104 | slot = htab_find_slot (per_cu->v.quick->mark | |
5105 | ? visited_found.get () | |
5106 | : visited_not_found.get (), | |
5107 | file_data, INSERT); | |
5108 | *slot = file_data; | |
9291a0cd | 5109 | } |
61920122 PA |
5110 | } |
5111 | ||
5112 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5113 | ||
5114 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5115 | symbol_matcher, | |
5116 | kind, [&] (offset_type idx) | |
5117 | { | |
5118 | dw2_expand_marked_cus (index, idx, objfile, file_matcher, | |
5119 | expansion_notify, kind); | |
5120 | }); | |
9291a0cd TT |
5121 | } |
5122 | ||
43f3e411 | 5123 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
5124 | symtab. */ |
5125 | ||
43f3e411 DE |
5126 | static struct compunit_symtab * |
5127 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5128 | CORE_ADDR pc) | |
9703b513 TT |
5129 | { |
5130 | int i; | |
5131 | ||
43f3e411 DE |
5132 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
5133 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5134 | return cust; | |
9703b513 | 5135 | |
43f3e411 | 5136 | if (cust->includes == NULL) |
a3ec0bb1 DE |
5137 | return NULL; |
5138 | ||
43f3e411 | 5139 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 5140 | { |
43f3e411 | 5141 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 5142 | |
43f3e411 | 5143 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
5144 | if (s != NULL) |
5145 | return s; | |
5146 | } | |
5147 | ||
5148 | return NULL; | |
5149 | } | |
5150 | ||
43f3e411 DE |
5151 | static struct compunit_symtab * |
5152 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5153 | struct bound_minimal_symbol msymbol, | |
5154 | CORE_ADDR pc, | |
5155 | struct obj_section *section, | |
5156 | int warn_if_readin) | |
9291a0cd TT |
5157 | { |
5158 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 5159 | struct compunit_symtab *result; |
9291a0cd TT |
5160 | |
5161 | dw2_setup (objfile); | |
5162 | ||
5163 | if (!objfile->psymtabs_addrmap) | |
5164 | return NULL; | |
5165 | ||
9a3c8263 SM |
5166 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
5167 | pc); | |
9291a0cd TT |
5168 | if (!data) |
5169 | return NULL; | |
5170 | ||
43f3e411 | 5171 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 5172 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
5173 | paddress (get_objfile_arch (objfile), pc)); |
5174 | ||
43f3e411 DE |
5175 | result |
5176 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
5177 | pc); | |
9703b513 TT |
5178 | gdb_assert (result != NULL); |
5179 | return result; | |
9291a0cd TT |
5180 | } |
5181 | ||
9291a0cd | 5182 | static void |
44b13c5a | 5183 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 5184 | void *data, int need_fullname) |
9291a0cd | 5185 | { |
9291a0cd | 5186 | dw2_setup (objfile); |
ae2de4f8 | 5187 | |
bbf2f4df | 5188 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 5189 | { |
bbf2f4df | 5190 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 5191 | |
bbf2f4df PA |
5192 | htab_up visited (htab_create_alloc (10, |
5193 | htab_hash_pointer, htab_eq_pointer, | |
5194 | NULL, xcalloc, xfree)); | |
24c79950 | 5195 | |
bbf2f4df PA |
5196 | /* The rule is CUs specify all the files, including those used |
5197 | by any TU, so there's no need to scan TUs here. We can | |
5198 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 5199 | |
bbf2f4df PA |
5200 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
5201 | { | |
5202 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 5203 | |
bbf2f4df PA |
5204 | if (per_cu->v.quick->compunit_symtab) |
5205 | { | |
5206 | void **slot = htab_find_slot (visited.get (), | |
5207 | per_cu->v.quick->file_names, | |
5208 | INSERT); | |
9291a0cd | 5209 | |
bbf2f4df PA |
5210 | *slot = per_cu->v.quick->file_names; |
5211 | } | |
24c79950 | 5212 | } |
24c79950 | 5213 | |
bbf2f4df | 5214 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 5215 | { |
bbf2f4df PA |
5216 | int j; |
5217 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5218 | struct quick_file_names *file_data; | |
5219 | void **slot; | |
5220 | ||
5221 | /* We only need to look at symtabs not already expanded. */ | |
5222 | if (per_cu->v.quick->compunit_symtab) | |
5223 | continue; | |
74e2f255 | 5224 | |
bbf2f4df PA |
5225 | file_data = dw2_get_file_names (per_cu); |
5226 | if (file_data == NULL) | |
5227 | continue; | |
5228 | ||
5229 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
5230 | if (*slot) | |
5231 | { | |
5232 | /* Already visited. */ | |
5233 | continue; | |
5234 | } | |
5235 | *slot = file_data; | |
5236 | ||
5237 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5238 | { | |
5239 | const char *filename = file_data->file_names[j]; | |
5240 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5241 | } | |
9291a0cd TT |
5242 | } |
5243 | } | |
bbf2f4df PA |
5244 | |
5245 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5246 | { | |
14278e1f | 5247 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
5248 | |
5249 | if (need_fullname) | |
5250 | this_real_name = gdb_realpath (filename); | |
14278e1f | 5251 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 5252 | }); |
9291a0cd TT |
5253 | } |
5254 | ||
5255 | static int | |
5256 | dw2_has_symbols (struct objfile *objfile) | |
5257 | { | |
5258 | return 1; | |
5259 | } | |
5260 | ||
5261 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5262 | { | |
5263 | dw2_has_symbols, | |
5264 | dw2_find_last_source_symtab, | |
5265 | dw2_forget_cached_source_info, | |
f8eba3c6 | 5266 | dw2_map_symtabs_matching_filename, |
9291a0cd | 5267 | dw2_lookup_symbol, |
9291a0cd TT |
5268 | dw2_print_stats, |
5269 | dw2_dump, | |
5270 | dw2_relocate, | |
5271 | dw2_expand_symtabs_for_function, | |
5272 | dw2_expand_all_symtabs, | |
652a8996 | 5273 | dw2_expand_symtabs_with_fullname, |
40658b94 | 5274 | dw2_map_matching_symbols, |
9291a0cd | 5275 | dw2_expand_symtabs_matching, |
43f3e411 | 5276 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 5277 | NULL, |
9291a0cd TT |
5278 | dw2_map_symbol_filenames |
5279 | }; | |
5280 | ||
5281 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
5282 | file will use psymtabs, or 1 if using the GNU index. */ | |
5283 | ||
5284 | int | |
5285 | dwarf2_initialize_objfile (struct objfile *objfile) | |
5286 | { | |
5287 | /* If we're about to read full symbols, don't bother with the | |
5288 | indices. In this case we also don't care if some other debug | |
5289 | format is making psymtabs, because they are all about to be | |
5290 | expanded anyway. */ | |
5291 | if ((objfile->flags & OBJF_READNOW)) | |
5292 | { | |
5293 | int i; | |
5294 | ||
5295 | dwarf2_per_objfile->using_index = 1; | |
5296 | create_all_comp_units (objfile); | |
0e50663e | 5297 | create_all_type_units (objfile); |
7b9f3c50 DE |
5298 | dwarf2_per_objfile->quick_file_names_table = |
5299 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 5300 | |
1fd400ff | 5301 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 5302 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 5303 | { |
8832e7e3 | 5304 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 5305 | |
e254ef6a DE |
5306 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5307 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5308 | } |
5309 | ||
5310 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5311 | these functions will be no-ops because we will have expanded | |
5312 | all symtabs. */ | |
5313 | return 1; | |
5314 | } | |
5315 | ||
5316 | if (dwarf2_read_index (objfile)) | |
5317 | return 1; | |
5318 | ||
9291a0cd TT |
5319 | return 0; |
5320 | } | |
5321 | ||
5322 | \f | |
5323 | ||
dce234bc PP |
5324 | /* Build a partial symbol table. */ |
5325 | ||
5326 | void | |
f29dff0a | 5327 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5328 | { |
c9bf0622 | 5329 | |
af5bf4ad SM |
5330 | if (objfile->global_psymbols.capacity () == 0 |
5331 | && objfile->static_psymbols.capacity () == 0) | |
5332 | init_psymbol_list (objfile, 1024); | |
c906108c | 5333 | |
492d29ea | 5334 | TRY |
c9bf0622 TT |
5335 | { |
5336 | /* This isn't really ideal: all the data we allocate on the | |
5337 | objfile's obstack is still uselessly kept around. However, | |
5338 | freeing it seems unsafe. */ | |
906768f9 | 5339 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 5340 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 5341 | psymtabs.keep (); |
c9bf0622 | 5342 | } |
492d29ea PA |
5343 | CATCH (except, RETURN_MASK_ERROR) |
5344 | { | |
5345 | exception_print (gdb_stderr, except); | |
5346 | } | |
5347 | END_CATCH | |
c906108c | 5348 | } |
c906108c | 5349 | |
1ce1cefd DE |
5350 | /* Return the total length of the CU described by HEADER. */ |
5351 | ||
5352 | static unsigned int | |
5353 | get_cu_length (const struct comp_unit_head *header) | |
5354 | { | |
5355 | return header->initial_length_size + header->length; | |
5356 | } | |
5357 | ||
9c541725 | 5358 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 5359 | |
9c541725 PA |
5360 | static inline bool |
5361 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 5362 | { |
9c541725 PA |
5363 | sect_offset bottom = cu_header->sect_off; |
5364 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 5365 | |
9c541725 | 5366 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
5367 | } |
5368 | ||
3b80fe9b DE |
5369 | /* Find the base address of the compilation unit for range lists and |
5370 | location lists. It will normally be specified by DW_AT_low_pc. | |
5371 | In DWARF-3 draft 4, the base address could be overridden by | |
5372 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5373 | compilation units with discontinuous ranges. */ | |
5374 | ||
5375 | static void | |
5376 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5377 | { | |
5378 | struct attribute *attr; | |
5379 | ||
5380 | cu->base_known = 0; | |
5381 | cu->base_address = 0; | |
5382 | ||
5383 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
5384 | if (attr) | |
5385 | { | |
31aa7e4e | 5386 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5387 | cu->base_known = 1; |
5388 | } | |
5389 | else | |
5390 | { | |
5391 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
5392 | if (attr) | |
5393 | { | |
31aa7e4e | 5394 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5395 | cu->base_known = 1; |
5396 | } | |
5397 | } | |
5398 | } | |
5399 | ||
93311388 | 5400 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 5401 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
5402 | NOTE: This leaves members offset, first_die_offset to be filled in |
5403 | by the caller. */ | |
107d2387 | 5404 | |
d521ce57 | 5405 | static const gdb_byte * |
107d2387 | 5406 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
5407 | const gdb_byte *info_ptr, |
5408 | struct dwarf2_section_info *section, | |
5409 | rcuh_kind section_kind) | |
107d2387 AC |
5410 | { |
5411 | int signed_addr; | |
891d2f0b | 5412 | unsigned int bytes_read; |
43988095 JK |
5413 | const char *filename = get_section_file_name (section); |
5414 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
5415 | |
5416 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
5417 | cu_header->initial_length_size = bytes_read; | |
5418 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 5419 | info_ptr += bytes_read; |
107d2387 AC |
5420 | cu_header->version = read_2_bytes (abfd, info_ptr); |
5421 | info_ptr += 2; | |
43988095 JK |
5422 | if (cu_header->version < 5) |
5423 | switch (section_kind) | |
5424 | { | |
5425 | case rcuh_kind::COMPILE: | |
5426 | cu_header->unit_type = DW_UT_compile; | |
5427 | break; | |
5428 | case rcuh_kind::TYPE: | |
5429 | cu_header->unit_type = DW_UT_type; | |
5430 | break; | |
5431 | default: | |
5432 | internal_error (__FILE__, __LINE__, | |
5433 | _("read_comp_unit_head: invalid section_kind")); | |
5434 | } | |
5435 | else | |
5436 | { | |
5437 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
5438 | (read_1_byte (abfd, info_ptr)); | |
5439 | info_ptr += 1; | |
5440 | switch (cu_header->unit_type) | |
5441 | { | |
5442 | case DW_UT_compile: | |
5443 | if (section_kind != rcuh_kind::COMPILE) | |
5444 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5445 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
5446 | filename); | |
5447 | break; | |
5448 | case DW_UT_type: | |
5449 | section_kind = rcuh_kind::TYPE; | |
5450 | break; | |
5451 | default: | |
5452 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5453 | "(is %d, should be %d or %d) [in module %s]"), | |
5454 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
5455 | } | |
5456 | ||
5457 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5458 | info_ptr += 1; | |
5459 | } | |
9c541725 PA |
5460 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
5461 | cu_header, | |
5462 | &bytes_read); | |
613e1657 | 5463 | info_ptr += bytes_read; |
43988095 JK |
5464 | if (cu_header->version < 5) |
5465 | { | |
5466 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5467 | info_ptr += 1; | |
5468 | } | |
107d2387 AC |
5469 | signed_addr = bfd_get_sign_extend_vma (abfd); |
5470 | if (signed_addr < 0) | |
8e65ff28 | 5471 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 5472 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 5473 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 5474 | |
43988095 JK |
5475 | if (section_kind == rcuh_kind::TYPE) |
5476 | { | |
5477 | LONGEST type_offset; | |
5478 | ||
5479 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
5480 | info_ptr += 8; | |
5481 | ||
5482 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
5483 | info_ptr += bytes_read; | |
9c541725 PA |
5484 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
5485 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
5486 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
5487 | "header (is %s) [in module %s]"), plongest (type_offset), | |
5488 | filename); | |
5489 | } | |
5490 | ||
107d2387 AC |
5491 | return info_ptr; |
5492 | } | |
5493 | ||
36586728 TT |
5494 | /* Helper function that returns the proper abbrev section for |
5495 | THIS_CU. */ | |
5496 | ||
5497 | static struct dwarf2_section_info * | |
5498 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5499 | { | |
5500 | struct dwarf2_section_info *abbrev; | |
5501 | ||
5502 | if (this_cu->is_dwz) | |
5503 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
5504 | else | |
5505 | abbrev = &dwarf2_per_objfile->abbrev; | |
5506 | ||
5507 | return abbrev; | |
5508 | } | |
5509 | ||
9ff913ba DE |
5510 | /* Subroutine of read_and_check_comp_unit_head and |
5511 | read_and_check_type_unit_head to simplify them. | |
5512 | Perform various error checking on the header. */ | |
5513 | ||
5514 | static void | |
5515 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
5516 | struct dwarf2_section_info *section, |
5517 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 5518 | { |
a32a8923 | 5519 | const char *filename = get_section_file_name (section); |
9ff913ba | 5520 | |
43988095 | 5521 | if (header->version < 2 || header->version > 5) |
9ff913ba | 5522 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 5523 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
5524 | filename); |
5525 | ||
9c541725 | 5526 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 5527 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
5528 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
5529 | "(offset 0x%x + 6) [in module %s]"), | |
5530 | to_underlying (header->abbrev_sect_off), | |
5531 | to_underlying (header->sect_off), | |
9ff913ba DE |
5532 | filename); |
5533 | ||
9c541725 | 5534 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 5535 | avoid potential 32-bit overflow. */ |
9c541725 | 5536 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 5537 | > section->size) |
9c541725 PA |
5538 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
5539 | "(offset 0x%x + 0) [in module %s]"), | |
5540 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
5541 | filename); |
5542 | } | |
5543 | ||
5544 | /* Read in a CU/TU header and perform some basic error checking. | |
5545 | The contents of the header are stored in HEADER. | |
5546 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 5547 | |
d521ce57 | 5548 | static const gdb_byte * |
9ff913ba DE |
5549 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
5550 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 5551 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 5552 | const gdb_byte *info_ptr, |
43988095 | 5553 | rcuh_kind section_kind) |
72bf9492 | 5554 | { |
d521ce57 | 5555 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 5556 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 5557 | |
9c541725 | 5558 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 5559 | |
43988095 | 5560 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 5561 | |
9c541725 | 5562 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 5563 | |
4bdcc0c1 | 5564 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
5565 | |
5566 | return info_ptr; | |
348e048f DE |
5567 | } |
5568 | ||
f4dc4d17 DE |
5569 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5570 | ||
5571 | static sect_offset | |
5572 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 5573 | sect_offset sect_off) |
f4dc4d17 | 5574 | { |
a32a8923 | 5575 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 5576 | const gdb_byte *info_ptr; |
ac298888 | 5577 | unsigned int initial_length_size, offset_size; |
43988095 | 5578 | uint16_t version; |
f4dc4d17 DE |
5579 | |
5580 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 5581 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5582 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5583 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5584 | info_ptr += initial_length_size; |
5585 | ||
5586 | version = read_2_bytes (abfd, info_ptr); | |
5587 | info_ptr += 2; | |
5588 | if (version >= 5) | |
5589 | { | |
5590 | /* Skip unit type and address size. */ | |
5591 | info_ptr += 2; | |
5592 | } | |
5593 | ||
9c541725 | 5594 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5595 | } |
5596 | ||
aaa75496 JB |
5597 | /* Allocate a new partial symtab for file named NAME and mark this new |
5598 | partial symtab as being an include of PST. */ | |
5599 | ||
5600 | static void | |
d521ce57 | 5601 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
5602 | struct objfile *objfile) |
5603 | { | |
5604 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
5605 | ||
fbd9ab74 JK |
5606 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5607 | { | |
5608 | /* It shares objfile->objfile_obstack. */ | |
5609 | subpst->dirname = pst->dirname; | |
5610 | } | |
5611 | ||
aaa75496 JB |
5612 | subpst->textlow = 0; |
5613 | subpst->texthigh = 0; | |
5614 | ||
8d749320 SM |
5615 | subpst->dependencies |
5616 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
5617 | subpst->dependencies[0] = pst; |
5618 | subpst->number_of_dependencies = 1; | |
5619 | ||
5620 | subpst->globals_offset = 0; | |
5621 | subpst->n_global_syms = 0; | |
5622 | subpst->statics_offset = 0; | |
5623 | subpst->n_static_syms = 0; | |
43f3e411 | 5624 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
5625 | subpst->read_symtab = pst->read_symtab; |
5626 | subpst->readin = 0; | |
5627 | ||
5628 | /* No private part is necessary for include psymtabs. This property | |
5629 | can be used to differentiate between such include psymtabs and | |
10b3939b | 5630 | the regular ones. */ |
58a9656e | 5631 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
5632 | } |
5633 | ||
5634 | /* Read the Line Number Program data and extract the list of files | |
5635 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5636 | partial symtab for each of these included files. */ |
aaa75496 JB |
5637 | |
5638 | static void | |
5639 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
5640 | struct die_info *die, |
5641 | struct partial_symtab *pst) | |
aaa75496 | 5642 | { |
fff8551c | 5643 | line_header_up lh; |
d85a05f0 | 5644 | struct attribute *attr; |
aaa75496 | 5645 | |
d85a05f0 DJ |
5646 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
5647 | if (attr) | |
9c541725 | 5648 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5649 | if (lh == NULL) |
5650 | return; /* No linetable, so no includes. */ | |
5651 | ||
c6da4cef | 5652 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 5653 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
5654 | } |
5655 | ||
348e048f | 5656 | static hashval_t |
52dc124a | 5657 | hash_signatured_type (const void *item) |
348e048f | 5658 | { |
9a3c8263 SM |
5659 | const struct signatured_type *sig_type |
5660 | = (const struct signatured_type *) item; | |
9a619af0 | 5661 | |
348e048f | 5662 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5663 | return sig_type->signature; |
348e048f DE |
5664 | } |
5665 | ||
5666 | static int | |
52dc124a | 5667 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5668 | { |
9a3c8263 SM |
5669 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5670 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5671 | |
348e048f DE |
5672 | return lhs->signature == rhs->signature; |
5673 | } | |
5674 | ||
1fd400ff TT |
5675 | /* Allocate a hash table for signatured types. */ |
5676 | ||
5677 | static htab_t | |
673bfd45 | 5678 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
5679 | { |
5680 | return htab_create_alloc_ex (41, | |
52dc124a DE |
5681 | hash_signatured_type, |
5682 | eq_signatured_type, | |
1fd400ff TT |
5683 | NULL, |
5684 | &objfile->objfile_obstack, | |
5685 | hashtab_obstack_allocate, | |
5686 | dummy_obstack_deallocate); | |
5687 | } | |
5688 | ||
d467dd73 | 5689 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
5690 | |
5691 | static int | |
d467dd73 | 5692 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 5693 | { |
9a3c8263 SM |
5694 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
5695 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 5696 | |
b4dd5633 | 5697 | **datap = sigt; |
1fd400ff TT |
5698 | ++*datap; |
5699 | ||
5700 | return 1; | |
5701 | } | |
5702 | ||
78d4d2c5 | 5703 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
5704 | and fill them into TYPES_HTAB. It will process only type units, |
5705 | therefore DW_UT_type. */ | |
c88ee1f0 | 5706 | |
78d4d2c5 JK |
5707 | static void |
5708 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
5709 | dwarf2_section_info *section, htab_t &types_htab, |
5710 | rcuh_kind section_kind) | |
348e048f | 5711 | { |
3019eac3 | 5712 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 5713 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
5714 | bfd *abfd; |
5715 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 5716 | |
4bdcc0c1 DE |
5717 | abbrev_section = (dwo_file != NULL |
5718 | ? &dwo_file->sections.abbrev | |
5719 | : &dwarf2_per_objfile->abbrev); | |
5720 | ||
b4f54984 | 5721 | if (dwarf_read_debug) |
43988095 JK |
5722 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
5723 | get_section_name (section), | |
a32a8923 | 5724 | get_section_file_name (abbrev_section)); |
09406207 | 5725 | |
78d4d2c5 JK |
5726 | dwarf2_read_section (objfile, section); |
5727 | info_ptr = section->buffer; | |
348e048f | 5728 | |
78d4d2c5 JK |
5729 | if (info_ptr == NULL) |
5730 | return; | |
348e048f | 5731 | |
78d4d2c5 JK |
5732 | /* We can't set abfd until now because the section may be empty or |
5733 | not present, in which case the bfd is unknown. */ | |
5734 | abfd = get_section_bfd_owner (section); | |
348e048f | 5735 | |
78d4d2c5 JK |
5736 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
5737 | because we don't need to read any dies: the signature is in the | |
5738 | header. */ | |
3019eac3 | 5739 | |
78d4d2c5 JK |
5740 | end_ptr = info_ptr + section->size; |
5741 | while (info_ptr < end_ptr) | |
5742 | { | |
78d4d2c5 JK |
5743 | struct signatured_type *sig_type; |
5744 | struct dwo_unit *dwo_tu; | |
5745 | void **slot; | |
5746 | const gdb_byte *ptr = info_ptr; | |
5747 | struct comp_unit_head header; | |
5748 | unsigned int length; | |
8b70b953 | 5749 | |
9c541725 | 5750 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 5751 | |
a49dd8dd JK |
5752 | /* Initialize it due to a false compiler warning. */ |
5753 | header.signature = -1; | |
9c541725 | 5754 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 5755 | |
78d4d2c5 JK |
5756 | /* We need to read the type's signature in order to build the hash |
5757 | table, but we don't need anything else just yet. */ | |
348e048f | 5758 | |
43988095 JK |
5759 | ptr = read_and_check_comp_unit_head (&header, section, |
5760 | abbrev_section, ptr, section_kind); | |
348e048f | 5761 | |
78d4d2c5 | 5762 | length = get_cu_length (&header); |
6caca83c | 5763 | |
78d4d2c5 JK |
5764 | /* Skip dummy type units. */ |
5765 | if (ptr >= info_ptr + length | |
43988095 JK |
5766 | || peek_abbrev_code (abfd, ptr) == 0 |
5767 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
5768 | { |
5769 | info_ptr += length; | |
5770 | continue; | |
5771 | } | |
dee91e82 | 5772 | |
78d4d2c5 JK |
5773 | if (types_htab == NULL) |
5774 | { | |
5775 | if (dwo_file) | |
5776 | types_htab = allocate_dwo_unit_table (objfile); | |
5777 | else | |
5778 | types_htab = allocate_signatured_type_table (objfile); | |
5779 | } | |
8b70b953 | 5780 | |
78d4d2c5 JK |
5781 | if (dwo_file) |
5782 | { | |
5783 | sig_type = NULL; | |
5784 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5785 | struct dwo_unit); | |
5786 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 5787 | dwo_tu->signature = header.signature; |
9c541725 | 5788 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 5789 | dwo_tu->section = section; |
9c541725 | 5790 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
5791 | dwo_tu->length = length; |
5792 | } | |
5793 | else | |
5794 | { | |
5795 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
5796 | The real type_offset is in the DWO file. */ | |
5797 | dwo_tu = NULL; | |
5798 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5799 | struct signatured_type); | |
43988095 | 5800 | sig_type->signature = header.signature; |
9c541725 | 5801 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
5802 | sig_type->per_cu.objfile = objfile; |
5803 | sig_type->per_cu.is_debug_types = 1; | |
5804 | sig_type->per_cu.section = section; | |
9c541725 | 5805 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
5806 | sig_type->per_cu.length = length; |
5807 | } | |
5808 | ||
5809 | slot = htab_find_slot (types_htab, | |
5810 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
5811 | INSERT); | |
5812 | gdb_assert (slot != NULL); | |
5813 | if (*slot != NULL) | |
5814 | { | |
9c541725 | 5815 | sect_offset dup_sect_off; |
0349ea22 | 5816 | |
3019eac3 DE |
5817 | if (dwo_file) |
5818 | { | |
78d4d2c5 JK |
5819 | const struct dwo_unit *dup_tu |
5820 | = (const struct dwo_unit *) *slot; | |
5821 | ||
9c541725 | 5822 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
5823 | } |
5824 | else | |
5825 | { | |
78d4d2c5 JK |
5826 | const struct signatured_type *dup_tu |
5827 | = (const struct signatured_type *) *slot; | |
5828 | ||
9c541725 | 5829 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 5830 | } |
8b70b953 | 5831 | |
78d4d2c5 JK |
5832 | complaint (&symfile_complaints, |
5833 | _("debug type entry at offset 0x%x is duplicate to" | |
5834 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 5835 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 5836 | hex_string (header.signature)); |
78d4d2c5 JK |
5837 | } |
5838 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 5839 | |
78d4d2c5 JK |
5840 | if (dwarf_read_debug > 1) |
5841 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 5842 | to_underlying (sect_off), |
43988095 | 5843 | hex_string (header.signature)); |
3019eac3 | 5844 | |
78d4d2c5 JK |
5845 | info_ptr += length; |
5846 | } | |
5847 | } | |
3019eac3 | 5848 | |
78d4d2c5 JK |
5849 | /* Create the hash table of all entries in the .debug_types |
5850 | (or .debug_types.dwo) section(s). | |
5851 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
5852 | otherwise it is NULL. | |
b3c8eb43 | 5853 | |
78d4d2c5 | 5854 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 5855 | |
78d4d2c5 | 5856 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 5857 | |
78d4d2c5 JK |
5858 | static void |
5859 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
5860 | VEC (dwarf2_section_info_def) *types, | |
5861 | htab_t &types_htab) | |
5862 | { | |
5863 | int ix; | |
5864 | struct dwarf2_section_info *section; | |
5865 | ||
5866 | if (VEC_empty (dwarf2_section_info_def, types)) | |
5867 | return; | |
348e048f | 5868 | |
78d4d2c5 JK |
5869 | for (ix = 0; |
5870 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5871 | ++ix) | |
43988095 JK |
5872 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5873 | rcuh_kind::TYPE); | |
3019eac3 DE |
5874 | } |
5875 | ||
5876 | /* Create the hash table of all entries in the .debug_types section, | |
5877 | and initialize all_type_units. | |
5878 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5879 | otherwise non-zero. */ | |
5880 | ||
5881 | static int | |
5882 | create_all_type_units (struct objfile *objfile) | |
5883 | { | |
78d4d2c5 | 5884 | htab_t types_htab = NULL; |
b4dd5633 | 5885 | struct signatured_type **iter; |
3019eac3 | 5886 | |
43988095 JK |
5887 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5888 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5889 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5890 | if (types_htab == NULL) |
5891 | { | |
5892 | dwarf2_per_objfile->signatured_types = NULL; | |
5893 | return 0; | |
5894 | } | |
5895 | ||
348e048f DE |
5896 | dwarf2_per_objfile->signatured_types = types_htab; |
5897 | ||
6aa5f3a6 DE |
5898 | dwarf2_per_objfile->n_type_units |
5899 | = dwarf2_per_objfile->n_allocated_type_units | |
5900 | = htab_elements (types_htab); | |
8d749320 SM |
5901 | dwarf2_per_objfile->all_type_units = |
5902 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5903 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5904 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5905 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5906 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5907 | |
348e048f DE |
5908 | return 1; |
5909 | } | |
5910 | ||
6aa5f3a6 DE |
5911 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5912 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5913 | Otherwise we find one. */ | |
5914 | ||
5915 | static struct signatured_type * | |
5916 | add_type_unit (ULONGEST sig, void **slot) | |
5917 | { | |
5918 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5919 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5920 | struct signatured_type *sig_type; | |
5921 | ||
5922 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5923 | ++n_type_units; | |
5924 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5925 | { | |
5926 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5927 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5928 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5929 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5930 | = XRESIZEVEC (struct signatured_type *, |
5931 | dwarf2_per_objfile->all_type_units, | |
5932 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5933 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5934 | } | |
5935 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5936 | ||
5937 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5938 | struct signatured_type); | |
5939 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5940 | sig_type->signature = sig; | |
5941 | sig_type->per_cu.is_debug_types = 1; | |
5942 | if (dwarf2_per_objfile->using_index) | |
5943 | { | |
5944 | sig_type->per_cu.v.quick = | |
5945 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5946 | struct dwarf2_per_cu_quick_data); | |
5947 | } | |
5948 | ||
5949 | if (slot == NULL) | |
5950 | { | |
5951 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5952 | sig_type, INSERT); | |
5953 | } | |
5954 | gdb_assert (*slot == NULL); | |
5955 | *slot = sig_type; | |
5956 | /* The rest of sig_type must be filled in by the caller. */ | |
5957 | return sig_type; | |
5958 | } | |
5959 | ||
a2ce51a0 DE |
5960 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5961 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5962 | ||
5963 | static void | |
5964 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5965 | struct signatured_type *sig_entry, | |
5966 | struct dwo_unit *dwo_entry) | |
5967 | { | |
7ee85ab1 | 5968 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5969 | gdb_assert (! sig_entry->per_cu.queued); |
5970 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5971 | if (dwarf2_per_objfile->using_index) |
5972 | { | |
5973 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5974 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5975 | } |
5976 | else | |
5977 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5978 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5979 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5980 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5981 | gdb_assert (sig_entry->dwo_unit == NULL); |
5982 | ||
5983 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5984 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5985 | sig_entry->per_cu.length = dwo_entry->length; |
5986 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5987 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5988 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5989 | sig_entry->dwo_unit = dwo_entry; | |
5990 | } | |
5991 | ||
5992 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5993 | If we haven't read the TU yet, create the signatured_type data structure |
5994 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5995 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5996 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5997 | containing that CU. Otherwise we could end up reading several other DWO | |
5998 | files (due to comdat folding) to process the transitive closure of all the | |
5999 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6000 | type signature that it needs. | |
a2ce51a0 DE |
6001 | We only do this for .gdb_index because in the psymtab case we already have |
6002 | to read all the DWOs to build the type unit groups. */ | |
6003 | ||
6004 | static struct signatured_type * | |
6005 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6006 | { | |
6007 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6008 | struct dwo_file *dwo_file; | |
6009 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6010 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6011 | void **slot; |
a2ce51a0 DE |
6012 | |
6013 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6014 | ||
6aa5f3a6 DE |
6015 | /* If TU skeletons have been removed then we may not have read in any |
6016 | TUs yet. */ | |
6017 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6018 | { | |
6019 | dwarf2_per_objfile->signatured_types | |
6020 | = allocate_signatured_type_table (objfile); | |
6021 | } | |
a2ce51a0 DE |
6022 | |
6023 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6024 | Use the global signatured_types array to do our own comdat-folding |
6025 | of types. If this is the first time we're reading this TU, and | |
6026 | the TU has an entry in .gdb_index, replace the recorded data from | |
6027 | .gdb_index with this TU. */ | |
a2ce51a0 | 6028 | |
a2ce51a0 | 6029 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
6030 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
6031 | &find_sig_entry, INSERT); | |
9a3c8263 | 6032 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6033 | |
6034 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6035 | read. Don't reassign the global entry to point to this DWO if that's |
6036 | the case. Also note that if the TU is already being read, it may not | |
6037 | have come from a DWO, the program may be a mix of Fission-compiled | |
6038 | code and non-Fission-compiled code. */ | |
6039 | ||
6040 | /* Have we already tried to read this TU? | |
6041 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6042 | needn't exist in the global table yet). */ | |
6043 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6044 | return sig_entry; |
6045 | ||
6aa5f3a6 DE |
6046 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6047 | dwo_unit of the TU itself. */ | |
6048 | dwo_file = cu->dwo_unit->dwo_file; | |
6049 | ||
a2ce51a0 DE |
6050 | /* Ok, this is the first time we're reading this TU. */ |
6051 | if (dwo_file->tus == NULL) | |
6052 | return NULL; | |
6053 | find_dwo_entry.signature = sig; | |
9a3c8263 | 6054 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
6055 | if (dwo_entry == NULL) |
6056 | return NULL; | |
6057 | ||
6aa5f3a6 DE |
6058 | /* If the global table doesn't have an entry for this TU, add one. */ |
6059 | if (sig_entry == NULL) | |
6060 | sig_entry = add_type_unit (sig, slot); | |
6061 | ||
a2ce51a0 | 6062 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 6063 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6064 | return sig_entry; |
6065 | } | |
6066 | ||
a2ce51a0 DE |
6067 | /* Subroutine of lookup_signatured_type. |
6068 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6069 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6070 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6071 | |
6072 | static struct signatured_type * | |
6073 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6074 | { | |
6075 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6076 | struct dwp_file *dwp_file = get_dwp_file (); | |
6077 | struct dwo_unit *dwo_entry; | |
6078 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6079 | void **slot; |
a2ce51a0 DE |
6080 | |
6081 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6082 | gdb_assert (dwp_file != NULL); | |
6083 | ||
6aa5f3a6 DE |
6084 | /* If TU skeletons have been removed then we may not have read in any |
6085 | TUs yet. */ | |
6086 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 6087 | { |
6aa5f3a6 DE |
6088 | dwarf2_per_objfile->signatured_types |
6089 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
6090 | } |
6091 | ||
6aa5f3a6 DE |
6092 | find_sig_entry.signature = sig; |
6093 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6094 | &find_sig_entry, INSERT); | |
9a3c8263 | 6095 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6096 | |
6097 | /* Have we already tried to read this TU? | |
6098 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6099 | needn't exist in the global table yet). */ | |
6100 | if (sig_entry != NULL) | |
6101 | return sig_entry; | |
6102 | ||
a2ce51a0 DE |
6103 | if (dwp_file->tus == NULL) |
6104 | return NULL; | |
57d63ce2 DE |
6105 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
6106 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
6107 | if (dwo_entry == NULL) |
6108 | return NULL; | |
6109 | ||
6aa5f3a6 | 6110 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
6111 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
6112 | ||
a2ce51a0 DE |
6113 | return sig_entry; |
6114 | } | |
6115 | ||
380bca97 | 6116 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6117 | Returns NULL if signature SIG is not present in the table. |
6118 | It is up to the caller to complain about this. */ | |
348e048f DE |
6119 | |
6120 | static struct signatured_type * | |
a2ce51a0 | 6121 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6122 | { |
a2ce51a0 DE |
6123 | if (cu->dwo_unit |
6124 | && dwarf2_per_objfile->using_index) | |
6125 | { | |
6126 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6127 | These cases require special processing. */ | |
6128 | if (get_dwp_file () == NULL) | |
6129 | return lookup_dwo_signatured_type (cu, sig); | |
6130 | else | |
6131 | return lookup_dwp_signatured_type (cu, sig); | |
6132 | } | |
6133 | else | |
6134 | { | |
6135 | struct signatured_type find_entry, *entry; | |
348e048f | 6136 | |
a2ce51a0 DE |
6137 | if (dwarf2_per_objfile->signatured_types == NULL) |
6138 | return NULL; | |
6139 | find_entry.signature = sig; | |
9a3c8263 SM |
6140 | entry = ((struct signatured_type *) |
6141 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
6142 | return entry; |
6143 | } | |
348e048f | 6144 | } |
42e7ad6c DE |
6145 | \f |
6146 | /* Low level DIE reading support. */ | |
348e048f | 6147 | |
d85a05f0 DJ |
6148 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6149 | ||
6150 | static void | |
6151 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6152 | struct dwarf2_cu *cu, |
3019eac3 DE |
6153 | struct dwarf2_section_info *section, |
6154 | struct dwo_file *dwo_file) | |
d85a05f0 | 6155 | { |
fceca515 | 6156 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 6157 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 6158 | reader->cu = cu; |
3019eac3 | 6159 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6160 | reader->die_section = section; |
6161 | reader->buffer = section->buffer; | |
f664829e | 6162 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 6163 | reader->comp_dir = NULL; |
d85a05f0 DJ |
6164 | } |
6165 | ||
b0c7bfa9 DE |
6166 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6167 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
6168 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
6169 | already. | |
6170 | ||
6171 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6172 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6173 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6174 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6175 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6176 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
6177 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
6178 | are filled in with the info of the DIE from the DWO file. | |
6179 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
6180 | provided an abbrev table to use. | |
6181 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
6182 | ||
6183 | static int | |
6184 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
6185 | struct dwo_unit *dwo_unit, | |
6186 | int abbrev_table_provided, | |
6187 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 6188 | const char *stub_comp_dir, |
b0c7bfa9 | 6189 | struct die_reader_specs *result_reader, |
d521ce57 | 6190 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
6191 | struct die_info **result_comp_unit_die, |
6192 | int *result_has_children) | |
6193 | { | |
6194 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6195 | struct dwarf2_cu *cu = this_cu->cu; | |
6196 | struct dwarf2_section_info *section; | |
6197 | bfd *abfd; | |
d521ce57 | 6198 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6199 | ULONGEST signature; /* Or dwo_id. */ |
6200 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
6201 | int i,num_extra_attrs; | |
6202 | struct dwarf2_section_info *dwo_abbrev_section; | |
6203 | struct attribute *attr; | |
6204 | struct die_info *comp_unit_die; | |
6205 | ||
b0aeadb3 DE |
6206 | /* At most one of these may be provided. */ |
6207 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6208 | |
b0c7bfa9 DE |
6209 | /* These attributes aren't processed until later: |
6210 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6211 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6212 | referenced later. However, these attributes are found in the stub | |
6213 | which we won't have later. In order to not impose this complication | |
6214 | on the rest of the code, we read them here and copy them to the | |
6215 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6216 | |
6217 | stmt_list = NULL; | |
6218 | low_pc = NULL; | |
6219 | high_pc = NULL; | |
6220 | ranges = NULL; | |
6221 | comp_dir = NULL; | |
6222 | ||
6223 | if (stub_comp_unit_die != NULL) | |
6224 | { | |
6225 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6226 | DWO file. */ | |
6227 | if (! this_cu->is_debug_types) | |
6228 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
6229 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6230 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6231 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6232 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6233 | ||
6234 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
6235 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
6236 | cu->addr_base = 0; | |
6237 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
6238 | if (attr) | |
6239 | cu->addr_base = DW_UNSND (attr); | |
6240 | ||
6241 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
6242 | We need the value before we can process DW_AT_ranges. */ | |
6243 | cu->ranges_base = 0; | |
6244 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
6245 | if (attr) | |
6246 | cu->ranges_base = DW_UNSND (attr); | |
6247 | } | |
a2ce51a0 DE |
6248 | else if (stub_comp_dir != NULL) |
6249 | { | |
6250 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 6251 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6252 | comp_dir->name = DW_AT_comp_dir; |
6253 | comp_dir->form = DW_FORM_string; | |
6254 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
6255 | DW_STRING (comp_dir) = stub_comp_dir; | |
6256 | } | |
b0c7bfa9 DE |
6257 | |
6258 | /* Set up for reading the DWO CU/TU. */ | |
6259 | cu->dwo_unit = dwo_unit; | |
6260 | section = dwo_unit->section; | |
6261 | dwarf2_read_section (objfile, section); | |
a32a8923 | 6262 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
6263 | begin_info_ptr = info_ptr = (section->buffer |
6264 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
6265 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
6266 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
6267 | ||
6268 | if (this_cu->is_debug_types) | |
6269 | { | |
b0c7bfa9 DE |
6270 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
6271 | ||
43988095 | 6272 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 6273 | dwo_abbrev_section, |
43988095 | 6274 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6275 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6276 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6277 | { |
6278 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
6279 | " TU at offset 0x%x [in module %s]"), | |
6280 | hex_string (sig_type->signature), | |
43988095 | 6281 | hex_string (cu->header.signature), |
9c541725 | 6282 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
6283 | bfd_get_filename (abfd)); |
6284 | } | |
9c541725 | 6285 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6286 | /* For DWOs coming from DWP files, we don't know the CU length |
6287 | nor the type's offset in the TU until now. */ | |
6288 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 6289 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6290 | |
6291 | /* Establish the type offset that can be used to lookup the type. | |
6292 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6293 | sig_type->type_offset_in_section |
6294 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6295 | } |
6296 | else | |
6297 | { | |
6298 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
6299 | dwo_abbrev_section, | |
43988095 | 6300 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6301 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6302 | /* For DWOs coming from DWP files, we don't know the CU length |
6303 | until now. */ | |
6304 | dwo_unit->length = get_cu_length (&cu->header); | |
6305 | } | |
6306 | ||
02142a6c DE |
6307 | /* Replace the CU's original abbrev table with the DWO's. |
6308 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
6309 | if (abbrev_table_provided) |
6310 | { | |
6311 | /* Don't free the provided abbrev table, the caller of | |
6312 | init_cutu_and_read_dies owns it. */ | |
6313 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6314 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
6315 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6316 | } | |
6317 | else | |
6318 | { | |
6319 | dwarf2_free_abbrev_table (cu); | |
6320 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6321 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
6322 | } |
6323 | ||
6324 | /* Read in the die, but leave space to copy over the attributes | |
6325 | from the stub. This has the benefit of simplifying the rest of | |
6326 | the code - all the work to maintain the illusion of a single | |
6327 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6328 | num_extra_attrs = ((stmt_list != NULL) | |
6329 | + (low_pc != NULL) | |
6330 | + (high_pc != NULL) | |
6331 | + (ranges != NULL) | |
6332 | + (comp_dir != NULL)); | |
6333 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
6334 | result_has_children, num_extra_attrs); | |
6335 | ||
6336 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6337 | comp_unit_die = *result_comp_unit_die; | |
6338 | i = comp_unit_die->num_attrs; | |
6339 | if (stmt_list != NULL) | |
6340 | comp_unit_die->attrs[i++] = *stmt_list; | |
6341 | if (low_pc != NULL) | |
6342 | comp_unit_die->attrs[i++] = *low_pc; | |
6343 | if (high_pc != NULL) | |
6344 | comp_unit_die->attrs[i++] = *high_pc; | |
6345 | if (ranges != NULL) | |
6346 | comp_unit_die->attrs[i++] = *ranges; | |
6347 | if (comp_dir != NULL) | |
6348 | comp_unit_die->attrs[i++] = *comp_dir; | |
6349 | comp_unit_die->num_attrs += num_extra_attrs; | |
6350 | ||
b4f54984 | 6351 | if (dwarf_die_debug) |
bf6af496 DE |
6352 | { |
6353 | fprintf_unfiltered (gdb_stdlog, | |
6354 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 6355 | get_section_name (section), |
bf6af496 DE |
6356 | (unsigned) (begin_info_ptr - section->buffer), |
6357 | bfd_get_filename (abfd)); | |
b4f54984 | 6358 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6359 | } |
6360 | ||
a2ce51a0 DE |
6361 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
6362 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
6363 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
6364 | to get it via circuitous means. Blech. */ | |
6365 | if (comp_dir != NULL) | |
6366 | result_reader->comp_dir = DW_STRING (comp_dir); | |
6367 | ||
b0c7bfa9 DE |
6368 | /* Skip dummy compilation units. */ |
6369 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6370 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6371 | return 0; | |
6372 | ||
6373 | *result_info_ptr = info_ptr; | |
6374 | return 1; | |
6375 | } | |
6376 | ||
6377 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
6378 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 6379 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6380 | |
6381 | static struct dwo_unit * | |
6382 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
6383 | struct die_info *comp_unit_die) | |
6384 | { | |
6385 | struct dwarf2_cu *cu = this_cu->cu; | |
6386 | struct attribute *attr; | |
6387 | ULONGEST signature; | |
6388 | struct dwo_unit *dwo_unit; | |
6389 | const char *comp_dir, *dwo_name; | |
6390 | ||
a2ce51a0 DE |
6391 | gdb_assert (cu != NULL); |
6392 | ||
b0c7bfa9 | 6393 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
6394 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6395 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
6396 | |
6397 | if (this_cu->is_debug_types) | |
6398 | { | |
6399 | struct signatured_type *sig_type; | |
6400 | ||
6401 | /* Since this_cu is the first member of struct signatured_type, | |
6402 | we can go from a pointer to one to a pointer to the other. */ | |
6403 | sig_type = (struct signatured_type *) this_cu; | |
6404 | signature = sig_type->signature; | |
6405 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
6406 | } | |
6407 | else | |
6408 | { | |
6409 | struct attribute *attr; | |
6410 | ||
6411 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6412 | if (! attr) | |
6413 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
6414 | " [in module %s]"), | |
4262abfb | 6415 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
6416 | signature = DW_UNSND (attr); |
6417 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
6418 | signature); | |
6419 | } | |
6420 | ||
b0c7bfa9 DE |
6421 | return dwo_unit; |
6422 | } | |
6423 | ||
a2ce51a0 | 6424 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
6425 | See it for a description of the parameters. |
6426 | Read a TU directly from a DWO file, bypassing the stub. | |
6427 | ||
6428 | Note: This function could be a little bit simpler if we shared cleanups | |
6429 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
6430 | to do, so we keep this function self-contained. Or we could move this | |
6431 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
6432 | |
6433 | static void | |
6aa5f3a6 DE |
6434 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
6435 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
6436 | die_reader_func_ftype *die_reader_func, |
6437 | void *data) | |
6438 | { | |
6439 | struct dwarf2_cu *cu; | |
6440 | struct signatured_type *sig_type; | |
6aa5f3a6 | 6441 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
6442 | struct die_reader_specs reader; |
6443 | const gdb_byte *info_ptr; | |
6444 | struct die_info *comp_unit_die; | |
6445 | int has_children; | |
6446 | ||
6447 | /* Verify we can do the following downcast, and that we have the | |
6448 | data we need. */ | |
6449 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6450 | sig_type = (struct signatured_type *) this_cu; | |
6451 | gdb_assert (sig_type->dwo_unit != NULL); | |
6452 | ||
6453 | cleanups = make_cleanup (null_cleanup, NULL); | |
6454 | ||
6aa5f3a6 DE |
6455 | if (use_existing_cu && this_cu->cu != NULL) |
6456 | { | |
6457 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6458 | cu = this_cu->cu; | |
6459 | /* There's no need to do the rereading_dwo_cu handling that | |
6460 | init_cutu_and_read_dies does since we don't read the stub. */ | |
6461 | } | |
6462 | else | |
6463 | { | |
6464 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6465 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6466 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
6467 | init_one_comp_unit (cu, this_cu); |
6468 | /* If an error occurs while loading, release our storage. */ | |
6469 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
6470 | } | |
6471 | ||
6472 | /* A future optimization, if needed, would be to use an existing | |
6473 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6474 | could share abbrev tables. */ | |
a2ce51a0 DE |
6475 | |
6476 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
6477 | 0 /* abbrev_table_provided */, | |
6478 | NULL /* stub_comp_unit_die */, | |
6479 | sig_type->dwo_unit->dwo_file->comp_dir, | |
6480 | &reader, &info_ptr, | |
6481 | &comp_unit_die, &has_children) == 0) | |
6482 | { | |
6483 | /* Dummy die. */ | |
6484 | do_cleanups (cleanups); | |
6485 | return; | |
6486 | } | |
6487 | ||
6488 | /* All the "real" work is done here. */ | |
6489 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6490 | ||
6aa5f3a6 | 6491 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
6492 | but the alternative is making the latter more complex. |
6493 | This function is only for the special case of using DWO files directly: | |
6494 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 6495 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 6496 | { |
6aa5f3a6 DE |
6497 | if (keep) |
6498 | { | |
6499 | /* We've successfully allocated this compilation unit. Let our | |
6500 | caller clean it up when finished with it. */ | |
6501 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6502 | |
6aa5f3a6 DE |
6503 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6504 | So we have to manually free the abbrev table. */ | |
6505 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 6506 | |
6aa5f3a6 DE |
6507 | /* Link this CU into read_in_chain. */ |
6508 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6509 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6510 | } | |
6511 | else | |
6512 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6513 | } |
a2ce51a0 DE |
6514 | |
6515 | do_cleanups (cleanups); | |
6516 | } | |
6517 | ||
fd820528 | 6518 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6519 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6520 | |
f4dc4d17 DE |
6521 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6522 | Otherwise the table specified in the comp unit header is read in and used. | |
6523 | This is an optimization for when we already have the abbrev table. | |
6524 | ||
dee91e82 DE |
6525 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6526 | Otherwise, a new CU is allocated with xmalloc. | |
6527 | ||
6528 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
6529 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
6530 | ||
6531 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 6532 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 6533 | |
70221824 | 6534 | static void |
fd820528 | 6535 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 6536 | struct abbrev_table *abbrev_table, |
fd820528 DE |
6537 | int use_existing_cu, int keep, |
6538 | die_reader_func_ftype *die_reader_func, | |
6539 | void *data) | |
c906108c | 6540 | { |
dee91e82 | 6541 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6542 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6543 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 6544 | struct dwarf2_cu *cu; |
d521ce57 | 6545 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 6546 | struct die_reader_specs reader; |
d85a05f0 | 6547 | struct die_info *comp_unit_die; |
dee91e82 | 6548 | int has_children; |
d85a05f0 | 6549 | struct attribute *attr; |
365156ad | 6550 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 6551 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6552 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6553 | /* Non-zero if CU currently points to a DWO file and we need to |
6554 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6555 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6556 | int rereading_dwo_cu = 0; |
c906108c | 6557 | |
b4f54984 | 6558 | if (dwarf_die_debug) |
09406207 DE |
6559 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6560 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6561 | to_underlying (this_cu->sect_off)); |
09406207 | 6562 | |
dee91e82 DE |
6563 | if (use_existing_cu) |
6564 | gdb_assert (keep); | |
23745b47 | 6565 | |
a2ce51a0 DE |
6566 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6567 | file (instead of going through the stub), short-circuit all of this. */ | |
6568 | if (this_cu->reading_dwo_directly) | |
6569 | { | |
6570 | /* Narrow down the scope of possibilities to have to understand. */ | |
6571 | gdb_assert (this_cu->is_debug_types); | |
6572 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
6573 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
6574 | die_reader_func, data); | |
a2ce51a0 DE |
6575 | return; |
6576 | } | |
6577 | ||
dee91e82 DE |
6578 | cleanups = make_cleanup (null_cleanup, NULL); |
6579 | ||
6580 | /* This is cheap if the section is already read in. */ | |
6581 | dwarf2_read_section (objfile, section); | |
6582 | ||
9c541725 | 6583 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6584 | |
6585 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6586 | |
6587 | if (use_existing_cu && this_cu->cu != NULL) | |
6588 | { | |
6589 | cu = this_cu->cu; | |
42e7ad6c DE |
6590 | /* If this CU is from a DWO file we need to start over, we need to |
6591 | refetch the attributes from the skeleton CU. | |
6592 | This could be optimized by retrieving those attributes from when we | |
6593 | were here the first time: the previous comp_unit_die was stored in | |
6594 | comp_unit_obstack. But there's no data yet that we need this | |
6595 | optimization. */ | |
6596 | if (cu->dwo_unit != NULL) | |
6597 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6598 | } |
6599 | else | |
6600 | { | |
6601 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6602 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6603 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 6604 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 6605 | /* If an error occurs while loading, release our storage. */ |
365156ad | 6606 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 6607 | } |
dee91e82 | 6608 | |
b0c7bfa9 | 6609 | /* Get the header. */ |
9c541725 | 6610 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6611 | { |
6612 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6613 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6614 | } |
6615 | else | |
6616 | { | |
3019eac3 | 6617 | if (this_cu->is_debug_types) |
dee91e82 | 6618 | { |
43988095 | 6619 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 6620 | abbrev_section, info_ptr, |
43988095 | 6621 | rcuh_kind::TYPE); |
dee91e82 | 6622 | |
42e7ad6c DE |
6623 | /* Since per_cu is the first member of struct signatured_type, |
6624 | we can go from a pointer to one to a pointer to the other. */ | |
6625 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6626 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6627 | gdb_assert (sig_type->type_offset_in_tu |
6628 | == cu->header.type_cu_offset_in_tu); | |
6629 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6630 | |
42e7ad6c DE |
6631 | /* LENGTH has not been set yet for type units if we're |
6632 | using .gdb_index. */ | |
1ce1cefd | 6633 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
6634 | |
6635 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6636 | sig_type->type_offset_in_section = |
6637 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6638 | |
6639 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6640 | } |
6641 | else | |
6642 | { | |
4bdcc0c1 DE |
6643 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
6644 | abbrev_section, | |
43988095 JK |
6645 | info_ptr, |
6646 | rcuh_kind::COMPILE); | |
dee91e82 | 6647 | |
9c541725 | 6648 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 6649 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 6650 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6651 | } |
6652 | } | |
10b3939b | 6653 | |
6caca83c | 6654 | /* Skip dummy compilation units. */ |
dee91e82 | 6655 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
6656 | || peek_abbrev_code (abfd, info_ptr) == 0) |
6657 | { | |
dee91e82 | 6658 | do_cleanups (cleanups); |
21b2bd31 | 6659 | return; |
6caca83c CC |
6660 | } |
6661 | ||
433df2d4 DE |
6662 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6663 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
6664 | done. Note that it's important that if the CU had an abbrev table |
6665 | on entry we don't free it when we're done: Somewhere up the call stack | |
6666 | it may be in use. */ | |
f4dc4d17 DE |
6667 | if (abbrev_table != NULL) |
6668 | { | |
6669 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 6670 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
6671 | cu->abbrev_table = abbrev_table; |
6672 | } | |
6673 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 6674 | { |
4bdcc0c1 | 6675 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
6676 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6677 | } | |
42e7ad6c DE |
6678 | else if (rereading_dwo_cu) |
6679 | { | |
6680 | dwarf2_free_abbrev_table (cu); | |
6681 | dwarf2_read_abbrevs (cu, abbrev_section); | |
6682 | } | |
af703f96 | 6683 | |
dee91e82 | 6684 | /* Read the top level CU/TU die. */ |
3019eac3 | 6685 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 6686 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 6687 | |
b0c7bfa9 DE |
6688 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
6689 | from the DWO file. | |
6690 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
6691 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
6692 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6693 | if (attr) | |
6694 | { | |
3019eac3 | 6695 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6696 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
6697 | |
6698 | if (has_children) | |
6a506a2d DE |
6699 | { |
6700 | complaint (&symfile_complaints, | |
6701 | _("compilation unit with DW_AT_GNU_dwo_name" | |
6702 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 6703 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 6704 | } |
b0c7bfa9 | 6705 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 6706 | if (dwo_unit != NULL) |
3019eac3 | 6707 | { |
6a506a2d DE |
6708 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
6709 | abbrev_table != NULL, | |
a2ce51a0 | 6710 | comp_unit_die, NULL, |
6a506a2d DE |
6711 | &reader, &info_ptr, |
6712 | &dwo_comp_unit_die, &has_children) == 0) | |
6713 | { | |
6714 | /* Dummy die. */ | |
6715 | do_cleanups (cleanups); | |
6716 | return; | |
6717 | } | |
6718 | comp_unit_die = dwo_comp_unit_die; | |
6719 | } | |
6720 | else | |
6721 | { | |
6722 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6723 | the stub. A complaint has already been logged. There's | |
6724 | not much more we can do except pass on the stub DIE to | |
6725 | die_reader_func. We don't want to throw an error on bad | |
6726 | debug info. */ | |
3019eac3 DE |
6727 | } |
6728 | } | |
6729 | ||
b0c7bfa9 | 6730 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
6731 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
6732 | ||
b0c7bfa9 | 6733 | /* Done, clean up. */ |
365156ad | 6734 | if (free_cu_cleanup != NULL) |
348e048f | 6735 | { |
365156ad TT |
6736 | if (keep) |
6737 | { | |
6738 | /* We've successfully allocated this compilation unit. Let our | |
6739 | caller clean it up when finished with it. */ | |
6740 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 6741 | |
365156ad TT |
6742 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6743 | So we have to manually free the abbrev table. */ | |
6744 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 6745 | |
365156ad TT |
6746 | /* Link this CU into read_in_chain. */ |
6747 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6748 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6749 | } | |
6750 | else | |
6751 | do_cleanups (free_cu_cleanup); | |
348e048f | 6752 | } |
365156ad TT |
6753 | |
6754 | do_cleanups (cleanups); | |
dee91e82 DE |
6755 | } |
6756 | ||
33e80786 DE |
6757 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
6758 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
6759 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6760 | |
6761 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6762 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6763 | |
6764 | We fill in THIS_CU->length. | |
6765 | ||
6766 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
6767 | linker) then DIE_READER_FUNC will not get called. | |
6768 | ||
6769 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6770 | This is done in order to not leave THIS_CU->cu in a state where we have |
6771 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
6772 | |
6773 | static void | |
6774 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 6775 | struct dwo_file *dwo_file, |
dee91e82 DE |
6776 | die_reader_func_ftype *die_reader_func, |
6777 | void *data) | |
6778 | { | |
6779 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 6780 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6781 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 6782 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 6783 | struct dwarf2_cu cu; |
d521ce57 | 6784 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
6785 | struct die_reader_specs reader; |
6786 | struct cleanup *cleanups; | |
6787 | struct die_info *comp_unit_die; | |
6788 | int has_children; | |
6789 | ||
b4f54984 | 6790 | if (dwarf_die_debug) |
09406207 DE |
6791 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6792 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6793 | to_underlying (this_cu->sect_off)); |
09406207 | 6794 | |
dee91e82 DE |
6795 | gdb_assert (this_cu->cu == NULL); |
6796 | ||
33e80786 DE |
6797 | abbrev_section = (dwo_file != NULL |
6798 | ? &dwo_file->sections.abbrev | |
6799 | : get_abbrev_section_for_cu (this_cu)); | |
6800 | ||
dee91e82 DE |
6801 | /* This is cheap if the section is already read in. */ |
6802 | dwarf2_read_section (objfile, section); | |
6803 | ||
6804 | init_one_comp_unit (&cu, this_cu); | |
6805 | ||
6806 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
6807 | ||
9c541725 | 6808 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
6809 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
6810 | abbrev_section, info_ptr, | |
43988095 JK |
6811 | (this_cu->is_debug_types |
6812 | ? rcuh_kind::TYPE | |
6813 | : rcuh_kind::COMPILE)); | |
dee91e82 | 6814 | |
1ce1cefd | 6815 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
6816 | |
6817 | /* Skip dummy compilation units. */ | |
6818 | if (info_ptr >= begin_info_ptr + this_cu->length | |
6819 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 6820 | { |
dee91e82 | 6821 | do_cleanups (cleanups); |
21b2bd31 | 6822 | return; |
93311388 | 6823 | } |
72bf9492 | 6824 | |
dee91e82 DE |
6825 | dwarf2_read_abbrevs (&cu, abbrev_section); |
6826 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
6827 | ||
3019eac3 | 6828 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
6829 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
6830 | ||
6831 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6832 | ||
6833 | do_cleanups (cleanups); | |
6834 | } | |
6835 | ||
3019eac3 DE |
6836 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
6837 | does not lookup the specified DWO file. | |
6838 | This cannot be used to read DWO files. | |
dee91e82 DE |
6839 | |
6840 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6841 | This is done in order to not leave THIS_CU->cu in a state where we have |
6842 | to care whether it refers to the "main" CU or the DWO CU. | |
6843 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
6844 | |
6845 | static void | |
6846 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
6847 | die_reader_func_ftype *die_reader_func, | |
6848 | void *data) | |
6849 | { | |
33e80786 | 6850 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 6851 | } |
0018ea6f DE |
6852 | \f |
6853 | /* Type Unit Groups. | |
dee91e82 | 6854 | |
0018ea6f DE |
6855 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
6856 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
6857 | so that all types coming from the same compilation (.o file) are grouped | |
6858 | together. A future step could be to put the types in the same symtab as | |
6859 | the CU the types ultimately came from. */ | |
ff013f42 | 6860 | |
f4dc4d17 DE |
6861 | static hashval_t |
6862 | hash_type_unit_group (const void *item) | |
6863 | { | |
9a3c8263 SM |
6864 | const struct type_unit_group *tu_group |
6865 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6866 | |
094b34ac | 6867 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6868 | } |
348e048f DE |
6869 | |
6870 | static int | |
f4dc4d17 | 6871 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6872 | { |
9a3c8263 SM |
6873 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6874 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6875 | |
094b34ac | 6876 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6877 | } |
348e048f | 6878 | |
f4dc4d17 DE |
6879 | /* Allocate a hash table for type unit groups. */ |
6880 | ||
6881 | static htab_t | |
6882 | allocate_type_unit_groups_table (void) | |
6883 | { | |
6884 | return htab_create_alloc_ex (3, | |
6885 | hash_type_unit_group, | |
6886 | eq_type_unit_group, | |
6887 | NULL, | |
6888 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6889 | hashtab_obstack_allocate, | |
6890 | dummy_obstack_deallocate); | |
6891 | } | |
dee91e82 | 6892 | |
f4dc4d17 DE |
6893 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6894 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6895 | of any one psymtab grow too big. */ | |
6896 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6897 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6898 | |
094b34ac | 6899 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6900 | Create the type_unit_group object used to hold one or more TUs. */ |
6901 | ||
6902 | static struct type_unit_group * | |
094b34ac | 6903 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6904 | { |
6905 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6906 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6907 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6908 | |
6909 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6910 | struct type_unit_group); | |
094b34ac | 6911 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6912 | per_cu->objfile = objfile; |
f4dc4d17 | 6913 | |
094b34ac DE |
6914 | if (dwarf2_per_objfile->using_index) |
6915 | { | |
6916 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6917 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6918 | } |
6919 | else | |
6920 | { | |
9c541725 | 6921 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6922 | struct partial_symtab *pst; |
6923 | char *name; | |
6924 | ||
6925 | /* Give the symtab a useful name for debug purposes. */ | |
6926 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6927 | name = xstrprintf ("<type_units_%d>", | |
6928 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6929 | else | |
6930 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6931 | ||
6932 | pst = create_partial_symtab (per_cu, name); | |
6933 | pst->anonymous = 1; | |
f4dc4d17 | 6934 | |
094b34ac DE |
6935 | xfree (name); |
6936 | } | |
f4dc4d17 | 6937 | |
094b34ac | 6938 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6939 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6940 | |
6941 | return tu_group; | |
6942 | } | |
6943 | ||
094b34ac DE |
6944 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6945 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6946 | |
6947 | static struct type_unit_group * | |
ff39bb5e | 6948 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6949 | { |
6950 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6951 | struct type_unit_group *tu_group; | |
6952 | void **slot; | |
6953 | unsigned int line_offset; | |
6954 | struct type_unit_group type_unit_group_for_lookup; | |
6955 | ||
6956 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6957 | { | |
6958 | dwarf2_per_objfile->type_unit_groups = | |
6959 | allocate_type_unit_groups_table (); | |
6960 | } | |
6961 | ||
6962 | /* Do we need to create a new group, or can we use an existing one? */ | |
6963 | ||
6964 | if (stmt_list) | |
6965 | { | |
6966 | line_offset = DW_UNSND (stmt_list); | |
6967 | ++tu_stats->nr_symtab_sharers; | |
6968 | } | |
6969 | else | |
6970 | { | |
6971 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6972 | We can do various things here like create one group per TU or | |
6973 | spread them over multiple groups to split up the expansion work. | |
6974 | To avoid worst case scenarios (too many groups or too large groups) | |
6975 | we, umm, group them in bunches. */ | |
6976 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6977 | | (tu_stats->nr_stmt_less_type_units | |
6978 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6979 | ++tu_stats->nr_stmt_less_type_units; | |
6980 | } | |
6981 | ||
094b34ac | 6982 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6983 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6984 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6985 | &type_unit_group_for_lookup, INSERT); | |
6986 | if (*slot != NULL) | |
6987 | { | |
9a3c8263 | 6988 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6989 | gdb_assert (tu_group != NULL); |
6990 | } | |
6991 | else | |
6992 | { | |
9c541725 | 6993 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6994 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6995 | *slot = tu_group; |
6996 | ++tu_stats->nr_symtabs; | |
6997 | } | |
6998 | ||
6999 | return tu_group; | |
7000 | } | |
0018ea6f DE |
7001 | \f |
7002 | /* Partial symbol tables. */ | |
7003 | ||
7004 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7005 | ||
7006 | The caller must fill in the following details: | |
7007 | dirname, textlow, texthigh. */ | |
7008 | ||
7009 | static struct partial_symtab * | |
7010 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
7011 | { | |
7012 | struct objfile *objfile = per_cu->objfile; | |
7013 | struct partial_symtab *pst; | |
7014 | ||
18a94d75 | 7015 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
7016 | objfile->global_psymbols, |
7017 | objfile->static_psymbols); | |
0018ea6f DE |
7018 | |
7019 | pst->psymtabs_addrmap_supported = 1; | |
7020 | ||
7021 | /* This is the glue that links PST into GDB's symbol API. */ | |
7022 | pst->read_symtab_private = per_cu; | |
7023 | pst->read_symtab = dwarf2_read_symtab; | |
7024 | per_cu->v.psymtab = pst; | |
7025 | ||
7026 | return pst; | |
7027 | } | |
7028 | ||
b93601f3 TT |
7029 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
7030 | type. */ | |
7031 | ||
7032 | struct process_psymtab_comp_unit_data | |
7033 | { | |
7034 | /* True if we are reading a DW_TAG_partial_unit. */ | |
7035 | ||
7036 | int want_partial_unit; | |
7037 | ||
7038 | /* The "pretend" language that is used if the CU doesn't declare a | |
7039 | language. */ | |
7040 | ||
7041 | enum language pretend_language; | |
7042 | }; | |
7043 | ||
0018ea6f DE |
7044 | /* die_reader_func for process_psymtab_comp_unit. */ |
7045 | ||
7046 | static void | |
7047 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7048 | const gdb_byte *info_ptr, |
0018ea6f DE |
7049 | struct die_info *comp_unit_die, |
7050 | int has_children, | |
7051 | void *data) | |
7052 | { | |
7053 | struct dwarf2_cu *cu = reader->cu; | |
7054 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 7055 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7056 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7057 | CORE_ADDR baseaddr; |
7058 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
7059 | struct partial_symtab *pst; | |
3a2b436a | 7060 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7061 | const char *filename; |
9a3c8263 SM |
7062 | struct process_psymtab_comp_unit_data *info |
7063 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 7064 | |
b93601f3 | 7065 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
7066 | return; |
7067 | ||
7068 | gdb_assert (! per_cu->is_debug_types); | |
7069 | ||
b93601f3 | 7070 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
7071 | |
7072 | cu->list_in_scope = &file_symbols; | |
7073 | ||
7074 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
7075 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7076 | if (filename == NULL) | |
0018ea6f | 7077 | filename = ""; |
0018ea6f DE |
7078 | |
7079 | pst = create_partial_symtab (per_cu, filename); | |
7080 | ||
7081 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7082 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
7083 | |
7084 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7085 | ||
7086 | dwarf2_find_base_address (comp_unit_die, cu); | |
7087 | ||
7088 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7089 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7090 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7091 | &best_highpc, cu, pst); | |
7092 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
7093 | /* Store the contiguous range if it is not empty; it can be empty for |
7094 | CUs with no code. */ | |
7095 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
7096 | gdbarch_adjust_dwarf2_addr (gdbarch, |
7097 | best_lowpc + baseaddr), | |
7098 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
7099 | best_highpc + baseaddr) - 1, | |
7100 | pst); | |
0018ea6f DE |
7101 | |
7102 | /* Check if comp unit has_children. | |
7103 | If so, read the rest of the partial symbols from this comp unit. | |
7104 | If not, there's no more debug_info for this comp unit. */ | |
7105 | if (has_children) | |
7106 | { | |
7107 | struct partial_die_info *first_die; | |
7108 | CORE_ADDR lowpc, highpc; | |
7109 | ||
7110 | lowpc = ((CORE_ADDR) -1); | |
7111 | highpc = ((CORE_ADDR) 0); | |
7112 | ||
7113 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7114 | ||
7115 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7116 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7117 | |
7118 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7119 | complaints from `maint check'. */ | |
7120 | if (lowpc == ((CORE_ADDR) -1)) | |
7121 | lowpc = highpc; | |
7122 | ||
7123 | /* If the compilation unit didn't have an explicit address range, | |
7124 | then use the information extracted from its child dies. */ | |
e385593e | 7125 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7126 | { |
7127 | best_lowpc = lowpc; | |
7128 | best_highpc = highpc; | |
7129 | } | |
7130 | } | |
3e29f34a MR |
7131 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
7132 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 7133 | |
8763cede | 7134 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
7135 | |
7136 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
7137 | { | |
7138 | int i; | |
7139 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7140 | struct dwarf2_per_cu_data *iter; | |
7141 | ||
7142 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7143 | post-pass. */ | |
7144 | pst->number_of_dependencies = len; | |
8d749320 SM |
7145 | pst->dependencies = |
7146 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
7147 | for (i = 0; |
7148 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
7149 | i, iter); | |
7150 | ++i) | |
7151 | pst->dependencies[i] = iter->v.psymtab; | |
7152 | ||
7153 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7154 | } | |
7155 | ||
7156 | /* Get the list of files included in the current compilation unit, | |
7157 | and build a psymtab for each of them. */ | |
7158 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7159 | ||
b4f54984 | 7160 | if (dwarf_read_debug) |
0018ea6f DE |
7161 | { |
7162 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
7163 | ||
7164 | fprintf_unfiltered (gdb_stdlog, | |
7165 | "Psymtab for %s unit @0x%x: %s - %s" | |
7166 | ", %d global, %d static syms\n", | |
7167 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 7168 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
7169 | paddress (gdbarch, pst->textlow), |
7170 | paddress (gdbarch, pst->texthigh), | |
7171 | pst->n_global_syms, pst->n_static_syms); | |
7172 | } | |
7173 | } | |
7174 | ||
7175 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7176 | Process compilation unit THIS_CU for a psymtab. */ | |
7177 | ||
7178 | static void | |
7179 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
7180 | int want_partial_unit, |
7181 | enum language pretend_language) | |
0018ea6f DE |
7182 | { |
7183 | /* If this compilation unit was already read in, free the | |
7184 | cached copy in order to read it in again. This is | |
7185 | necessary because we skipped some symbols when we first | |
7186 | read in the compilation unit (see load_partial_dies). | |
7187 | This problem could be avoided, but the benefit is unclear. */ | |
7188 | if (this_cu->cu != NULL) | |
7189 | free_one_cached_comp_unit (this_cu); | |
7190 | ||
f1902523 JK |
7191 | if (this_cu->is_debug_types) |
7192 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
7193 | NULL); | |
7194 | else | |
7195 | { | |
7196 | process_psymtab_comp_unit_data info; | |
7197 | info.want_partial_unit = want_partial_unit; | |
7198 | info.pretend_language = pretend_language; | |
7199 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
7200 | process_psymtab_comp_unit_reader, &info); | |
7201 | } | |
0018ea6f DE |
7202 | |
7203 | /* Age out any secondary CUs. */ | |
7204 | age_cached_comp_units (); | |
7205 | } | |
f4dc4d17 DE |
7206 | |
7207 | /* Reader function for build_type_psymtabs. */ | |
7208 | ||
7209 | static void | |
7210 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7211 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
7212 | struct die_info *type_unit_die, |
7213 | int has_children, | |
7214 | void *data) | |
7215 | { | |
7216 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7217 | struct dwarf2_cu *cu = reader->cu; | |
7218 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7219 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7220 | struct type_unit_group *tu_group; |
7221 | struct attribute *attr; | |
7222 | struct partial_die_info *first_die; | |
7223 | CORE_ADDR lowpc, highpc; | |
7224 | struct partial_symtab *pst; | |
7225 | ||
7226 | gdb_assert (data == NULL); | |
0186c6a7 DE |
7227 | gdb_assert (per_cu->is_debug_types); |
7228 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7229 | |
7230 | if (! has_children) | |
7231 | return; | |
7232 | ||
7233 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 7234 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7235 | |
0186c6a7 | 7236 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
7237 | |
7238 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
7239 | cu->list_in_scope = &file_symbols; | |
7240 | pst = create_partial_symtab (per_cu, ""); | |
7241 | pst->anonymous = 1; | |
7242 | ||
7243 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7244 | ||
7245 | lowpc = (CORE_ADDR) -1; | |
7246 | highpc = (CORE_ADDR) 0; | |
7247 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7248 | ||
8763cede | 7249 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
7250 | } |
7251 | ||
73051182 DE |
7252 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7253 | ||
7254 | struct tu_abbrev_offset | |
7255 | { | |
7256 | struct signatured_type *sig_type; | |
7257 | sect_offset abbrev_offset; | |
7258 | }; | |
7259 | ||
7260 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
7261 | ||
7262 | static int | |
7263 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
7264 | { | |
9a3c8263 SM |
7265 | const struct tu_abbrev_offset * const *a |
7266 | = (const struct tu_abbrev_offset * const*) ap; | |
7267 | const struct tu_abbrev_offset * const *b | |
7268 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
7269 | sect_offset aoff = (*a)->abbrev_offset; |
7270 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
7271 | |
7272 | return (aoff > boff) - (aoff < boff); | |
7273 | } | |
7274 | ||
7275 | /* Efficiently read all the type units. | |
7276 | This does the bulk of the work for build_type_psymtabs. | |
7277 | ||
7278 | The efficiency is because we sort TUs by the abbrev table they use and | |
7279 | only read each abbrev table once. In one program there are 200K TUs | |
7280 | sharing 8K abbrev tables. | |
7281 | ||
7282 | The main purpose of this function is to support building the | |
7283 | dwarf2_per_objfile->type_unit_groups table. | |
7284 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7285 | can collapse the search space by grouping them by stmt_list. | |
7286 | The savings can be significant, in the same program from above the 200K TUs | |
7287 | share 8K stmt_list tables. | |
7288 | ||
7289 | FUNC is expected to call get_type_unit_group, which will create the | |
7290 | struct type_unit_group if necessary and add it to | |
7291 | dwarf2_per_objfile->type_unit_groups. */ | |
7292 | ||
7293 | static void | |
7294 | build_type_psymtabs_1 (void) | |
7295 | { | |
73051182 DE |
7296 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7297 | struct cleanup *cleanups; | |
7298 | struct abbrev_table *abbrev_table; | |
7299 | sect_offset abbrev_offset; | |
7300 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
7301 | int i; |
7302 | ||
7303 | /* It's up to the caller to not call us multiple times. */ | |
7304 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7305 | ||
7306 | if (dwarf2_per_objfile->n_type_units == 0) | |
7307 | return; | |
7308 | ||
7309 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7310 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7311 | read each abbrev table in. | |
7312 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7313 | This is simpler and efficient enough for now. | |
7314 | ||
7315 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7316 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7317 | stmt_list value too so in practice this should work well. | |
7318 | ||
7319 | The basic algorithm here is: | |
7320 | ||
7321 | sort TUs by abbrev table | |
7322 | for each TU with same abbrev table: | |
7323 | read abbrev table if first user | |
7324 | read TU top level DIE | |
7325 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7326 | call FUNC */ | |
7327 | ||
b4f54984 | 7328 | if (dwarf_read_debug) |
73051182 DE |
7329 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7330 | ||
7331 | /* Sort in a separate table to maintain the order of all_type_units | |
7332 | for .gdb_index: TU indices directly index all_type_units. */ | |
7333 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
7334 | dwarf2_per_objfile->n_type_units); | |
7335 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7336 | { | |
7337 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
7338 | ||
7339 | sorted_by_abbrev[i].sig_type = sig_type; | |
7340 | sorted_by_abbrev[i].abbrev_offset = | |
7341 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 7342 | sig_type->per_cu.sect_off); |
73051182 DE |
7343 | } |
7344 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
7345 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
7346 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
7347 | ||
9c541725 | 7348 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
7349 | abbrev_table = NULL; |
7350 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
7351 | ||
7352 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7353 | { | |
7354 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
7355 | ||
7356 | /* Switch to the next abbrev table if necessary. */ | |
7357 | if (abbrev_table == NULL | |
9c541725 | 7358 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
7359 | { |
7360 | if (abbrev_table != NULL) | |
7361 | { | |
7362 | abbrev_table_free (abbrev_table); | |
7363 | /* Reset to NULL in case abbrev_table_read_table throws | |
7364 | an error: abbrev_table_free_cleanup will get called. */ | |
7365 | abbrev_table = NULL; | |
7366 | } | |
7367 | abbrev_offset = tu->abbrev_offset; | |
7368 | abbrev_table = | |
7369 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
7370 | abbrev_offset); | |
7371 | ++tu_stats->nr_uniq_abbrev_tables; | |
7372 | } | |
7373 | ||
7374 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
7375 | build_type_psymtabs_reader, NULL); | |
7376 | } | |
7377 | ||
73051182 | 7378 | do_cleanups (cleanups); |
6aa5f3a6 | 7379 | } |
73051182 | 7380 | |
6aa5f3a6 DE |
7381 | /* Print collected type unit statistics. */ |
7382 | ||
7383 | static void | |
7384 | print_tu_stats (void) | |
7385 | { | |
7386 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7387 | ||
7388 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
7389 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
7390 | dwarf2_per_objfile->n_type_units); | |
7391 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
7392 | tu_stats->nr_uniq_abbrev_tables); | |
7393 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7394 | tu_stats->nr_symtabs); | |
7395 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7396 | tu_stats->nr_symtab_sharers); | |
7397 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7398 | tu_stats->nr_stmt_less_type_units); | |
7399 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7400 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7401 | } |
7402 | ||
f4dc4d17 DE |
7403 | /* Traversal function for build_type_psymtabs. */ |
7404 | ||
7405 | static int | |
7406 | build_type_psymtab_dependencies (void **slot, void *info) | |
7407 | { | |
7408 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7409 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7410 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 7411 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
7412 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
7413 | struct signatured_type *iter; | |
f4dc4d17 DE |
7414 | int i; |
7415 | ||
7416 | gdb_assert (len > 0); | |
0186c6a7 | 7417 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
7418 | |
7419 | pst->number_of_dependencies = len; | |
8d749320 SM |
7420 | pst->dependencies = |
7421 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 7422 | for (i = 0; |
0186c6a7 | 7423 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
7424 | ++i) |
7425 | { | |
0186c6a7 DE |
7426 | gdb_assert (iter->per_cu.is_debug_types); |
7427 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7428 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7429 | } |
7430 | ||
0186c6a7 | 7431 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
7432 | |
7433 | return 1; | |
7434 | } | |
7435 | ||
7436 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7437 | Build partial symbol tables for the .debug_types comp-units. */ | |
7438 | ||
7439 | static void | |
7440 | build_type_psymtabs (struct objfile *objfile) | |
7441 | { | |
0e50663e | 7442 | if (! create_all_type_units (objfile)) |
348e048f DE |
7443 | return; |
7444 | ||
73051182 | 7445 | build_type_psymtabs_1 (); |
6aa5f3a6 | 7446 | } |
f4dc4d17 | 7447 | |
6aa5f3a6 DE |
7448 | /* Traversal function for process_skeletonless_type_unit. |
7449 | Read a TU in a DWO file and build partial symbols for it. */ | |
7450 | ||
7451 | static int | |
7452 | process_skeletonless_type_unit (void **slot, void *info) | |
7453 | { | |
7454 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 7455 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
7456 | struct signatured_type find_entry, *entry; |
7457 | ||
7458 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7459 | ||
7460 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7461 | { | |
7462 | dwarf2_per_objfile->signatured_types | |
7463 | = allocate_signatured_type_table (objfile); | |
7464 | } | |
7465 | ||
7466 | find_entry.signature = dwo_unit->signature; | |
7467 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
7468 | INSERT); | |
7469 | /* If we've already seen this type there's nothing to do. What's happening | |
7470 | is we're doing our own version of comdat-folding here. */ | |
7471 | if (*slot != NULL) | |
7472 | return 1; | |
7473 | ||
7474 | /* This does the job that create_all_type_units would have done for | |
7475 | this TU. */ | |
7476 | entry = add_type_unit (dwo_unit->signature, slot); | |
7477 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
7478 | *slot = entry; | |
7479 | ||
7480 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
7481 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
7482 | build_type_psymtabs_reader, NULL); | |
7483 | ||
7484 | return 1; | |
7485 | } | |
7486 | ||
7487 | /* Traversal function for process_skeletonless_type_units. */ | |
7488 | ||
7489 | static int | |
7490 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7491 | { | |
7492 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7493 | ||
7494 | if (dwo_file->tus != NULL) | |
7495 | { | |
7496 | htab_traverse_noresize (dwo_file->tus, | |
7497 | process_skeletonless_type_unit, info); | |
7498 | } | |
7499 | ||
7500 | return 1; | |
7501 | } | |
7502 | ||
7503 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7504 | This is needed in case a TU was emitted without its skeleton. | |
7505 | Note: This can't be done until we know what all the DWO files are. */ | |
7506 | ||
7507 | static void | |
7508 | process_skeletonless_type_units (struct objfile *objfile) | |
7509 | { | |
7510 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
7511 | if (get_dwp_file () == NULL | |
7512 | && dwarf2_per_objfile->dwo_files != NULL) | |
7513 | { | |
7514 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
7515 | process_dwo_file_for_skeletonless_type_units, | |
7516 | objfile); | |
7517 | } | |
348e048f DE |
7518 | } |
7519 | ||
95554aad TT |
7520 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
7521 | ||
7522 | static void | |
7523 | set_partial_user (struct objfile *objfile) | |
7524 | { | |
7525 | int i; | |
7526 | ||
7527 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
7528 | { | |
8832e7e3 | 7529 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
7530 | struct partial_symtab *pst = per_cu->v.psymtab; |
7531 | int j; | |
7532 | ||
36586728 TT |
7533 | if (pst == NULL) |
7534 | continue; | |
7535 | ||
95554aad TT |
7536 | for (j = 0; j < pst->number_of_dependencies; ++j) |
7537 | { | |
7538 | /* Set the 'user' field only if it is not already set. */ | |
7539 | if (pst->dependencies[j]->user == NULL) | |
7540 | pst->dependencies[j]->user = pst; | |
7541 | } | |
7542 | } | |
7543 | } | |
7544 | ||
93311388 DE |
7545 | /* Build the partial symbol table by doing a quick pass through the |
7546 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7547 | |
93311388 | 7548 | static void |
c67a9c90 | 7549 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 7550 | { |
791afaa2 | 7551 | struct cleanup *back_to; |
21b2bd31 | 7552 | int i; |
93311388 | 7553 | |
b4f54984 | 7554 | if (dwarf_read_debug) |
45cfd468 DE |
7555 | { |
7556 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7557 | objfile_name (objfile)); |
45cfd468 DE |
7558 | } |
7559 | ||
98bfdba5 PA |
7560 | dwarf2_per_objfile->reading_partial_symbols = 1; |
7561 | ||
be391dca | 7562 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 7563 | |
93311388 DE |
7564 | /* Any cached compilation units will be linked by the per-objfile |
7565 | read_in_chain. Make sure to free them when we're done. */ | |
7566 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 7567 | |
348e048f DE |
7568 | build_type_psymtabs (objfile); |
7569 | ||
93311388 | 7570 | create_all_comp_units (objfile); |
c906108c | 7571 | |
60606b2c TT |
7572 | /* Create a temporary address map on a temporary obstack. We later |
7573 | copy this to the final obstack. */ | |
8268c778 | 7574 | auto_obstack temp_obstack; |
791afaa2 TT |
7575 | |
7576 | scoped_restore save_psymtabs_addrmap | |
7577 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
7578 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 7579 | |
21b2bd31 | 7580 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 7581 | { |
8832e7e3 | 7582 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 7583 | |
b93601f3 | 7584 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 7585 | } |
ff013f42 | 7586 | |
6aa5f3a6 DE |
7587 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
7588 | process_skeletonless_type_units (objfile); | |
7589 | ||
7590 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7591 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7592 | { | |
7593 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
7594 | build_type_psymtab_dependencies, NULL); | |
7595 | } | |
7596 | ||
b4f54984 | 7597 | if (dwarf_read_debug) |
6aa5f3a6 DE |
7598 | print_tu_stats (); |
7599 | ||
95554aad TT |
7600 | set_partial_user (objfile); |
7601 | ||
ff013f42 JK |
7602 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
7603 | &objfile->objfile_obstack); | |
791afaa2 TT |
7604 | /* At this point we want to keep the address map. */ |
7605 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7606 | |
ae038cb0 | 7607 | do_cleanups (back_to); |
45cfd468 | 7608 | |
b4f54984 | 7609 | if (dwarf_read_debug) |
45cfd468 | 7610 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7611 | objfile_name (objfile)); |
ae038cb0 DJ |
7612 | } |
7613 | ||
3019eac3 | 7614 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
7615 | |
7616 | static void | |
dee91e82 | 7617 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 7618 | const gdb_byte *info_ptr, |
dee91e82 DE |
7619 | struct die_info *comp_unit_die, |
7620 | int has_children, | |
7621 | void *data) | |
ae038cb0 | 7622 | { |
dee91e82 | 7623 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 7624 | |
95554aad | 7625 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 7626 | |
ae038cb0 DJ |
7627 | /* Check if comp unit has_children. |
7628 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 7629 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 7630 | if (has_children) |
dee91e82 DE |
7631 | load_partial_dies (reader, info_ptr, 0); |
7632 | } | |
98bfdba5 | 7633 | |
dee91e82 DE |
7634 | /* Load the partial DIEs for a secondary CU into memory. |
7635 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7636 | |
dee91e82 DE |
7637 | static void |
7638 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7639 | { | |
f4dc4d17 DE |
7640 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7641 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
7642 | } |
7643 | ||
ae038cb0 | 7644 | static void |
36586728 TT |
7645 | read_comp_units_from_section (struct objfile *objfile, |
7646 | struct dwarf2_section_info *section, | |
f1902523 | 7647 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
7648 | unsigned int is_dwz, |
7649 | int *n_allocated, | |
7650 | int *n_comp_units, | |
7651 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 7652 | { |
d521ce57 | 7653 | const gdb_byte *info_ptr; |
a32a8923 | 7654 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 7655 | |
b4f54984 | 7656 | if (dwarf_read_debug) |
bf6af496 | 7657 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
7658 | get_section_name (section), |
7659 | get_section_file_name (section)); | |
bf6af496 | 7660 | |
36586728 | 7661 | dwarf2_read_section (objfile, section); |
ae038cb0 | 7662 | |
36586728 | 7663 | info_ptr = section->buffer; |
6e70227d | 7664 | |
36586728 | 7665 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7666 | { |
ae038cb0 | 7667 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7668 | |
9c541725 | 7669 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7670 | |
f1902523 JK |
7671 | comp_unit_head cu_header; |
7672 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
7673 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7674 | |
7675 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7676 | if (cu_header.unit_type != DW_UT_type) |
7677 | { | |
7678 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7679 | struct dwarf2_per_cu_data); | |
7680 | memset (this_cu, 0, sizeof (*this_cu)); | |
7681 | } | |
7682 | else | |
7683 | { | |
7684 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7685 | struct signatured_type); | |
7686 | memset (sig_type, 0, sizeof (*sig_type)); | |
7687 | sig_type->signature = cu_header.signature; | |
7688 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7689 | this_cu = &sig_type->per_cu; | |
7690 | } | |
7691 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7692 | this_cu->sect_off = sect_off; |
f1902523 | 7693 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7694 | this_cu->is_dwz = is_dwz; |
9291a0cd | 7695 | this_cu->objfile = objfile; |
8a0459fd | 7696 | this_cu->section = section; |
ae038cb0 | 7697 | |
36586728 | 7698 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 7699 | { |
36586728 | 7700 | *n_allocated *= 2; |
224c3ddb SM |
7701 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
7702 | *all_comp_units, *n_allocated); | |
ae038cb0 | 7703 | } |
36586728 TT |
7704 | (*all_comp_units)[*n_comp_units] = this_cu; |
7705 | ++*n_comp_units; | |
ae038cb0 DJ |
7706 | |
7707 | info_ptr = info_ptr + this_cu->length; | |
7708 | } | |
36586728 TT |
7709 | } |
7710 | ||
7711 | /* Create a list of all compilation units in OBJFILE. | |
7712 | This is only done for -readnow and building partial symtabs. */ | |
7713 | ||
7714 | static void | |
7715 | create_all_comp_units (struct objfile *objfile) | |
7716 | { | |
7717 | int n_allocated; | |
7718 | int n_comp_units; | |
7719 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 7720 | struct dwz_file *dwz; |
36586728 TT |
7721 | |
7722 | n_comp_units = 0; | |
7723 | n_allocated = 10; | |
8d749320 | 7724 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 7725 | |
f1902523 JK |
7726 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
7727 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
7728 | &n_allocated, &n_comp_units, &all_comp_units); |
7729 | ||
4db1a1dc TT |
7730 | dwz = dwarf2_get_dwz_file (); |
7731 | if (dwz != NULL) | |
f1902523 | 7732 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
7733 | &n_allocated, &n_comp_units, |
7734 | &all_comp_units); | |
ae038cb0 | 7735 | |
8d749320 SM |
7736 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
7737 | struct dwarf2_per_cu_data *, | |
7738 | n_comp_units); | |
ae038cb0 DJ |
7739 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
7740 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
7741 | xfree (all_comp_units); | |
7742 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
7743 | } |
7744 | ||
5734ee8b | 7745 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7746 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7747 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7748 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7749 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7750 | |
72bf9492 DJ |
7751 | static void |
7752 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7753 | CORE_ADDR *highpc, int set_addrmap, |
7754 | struct dwarf2_cu *cu) | |
c906108c | 7755 | { |
72bf9492 | 7756 | struct partial_die_info *pdi; |
c906108c | 7757 | |
91c24f0a DC |
7758 | /* Now, march along the PDI's, descending into ones which have |
7759 | interesting children but skipping the children of the other ones, | |
7760 | until we reach the end of the compilation unit. */ | |
c906108c | 7761 | |
72bf9492 | 7762 | pdi = first_die; |
91c24f0a | 7763 | |
72bf9492 DJ |
7764 | while (pdi != NULL) |
7765 | { | |
7766 | fixup_partial_die (pdi, cu); | |
c906108c | 7767 | |
f55ee35c | 7768 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7769 | children, so we need to look at them. Ditto for anonymous |
7770 | enums. */ | |
933c6fe4 | 7771 | |
72bf9492 | 7772 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
7773 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
7774 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 7775 | { |
72bf9492 | 7776 | switch (pdi->tag) |
c906108c SS |
7777 | { |
7778 | case DW_TAG_subprogram: | |
cdc07690 | 7779 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7780 | break; |
72929c62 | 7781 | case DW_TAG_constant: |
c906108c SS |
7782 | case DW_TAG_variable: |
7783 | case DW_TAG_typedef: | |
91c24f0a | 7784 | case DW_TAG_union_type: |
72bf9492 | 7785 | if (!pdi->is_declaration) |
63d06c5c | 7786 | { |
72bf9492 | 7787 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7788 | } |
7789 | break; | |
c906108c | 7790 | case DW_TAG_class_type: |
680b30c7 | 7791 | case DW_TAG_interface_type: |
c906108c | 7792 | case DW_TAG_structure_type: |
72bf9492 | 7793 | if (!pdi->is_declaration) |
c906108c | 7794 | { |
72bf9492 | 7795 | add_partial_symbol (pdi, cu); |
c906108c | 7796 | } |
e98c9e7c TT |
7797 | if (cu->language == language_rust && pdi->has_children) |
7798 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
7799 | set_addrmap, cu); | |
c906108c | 7800 | break; |
91c24f0a | 7801 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7802 | if (!pdi->is_declaration) |
7803 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7804 | break; |
7805 | case DW_TAG_base_type: | |
a02abb62 | 7806 | case DW_TAG_subrange_type: |
c906108c | 7807 | /* File scope base type definitions are added to the partial |
c5aa993b | 7808 | symbol table. */ |
72bf9492 | 7809 | add_partial_symbol (pdi, cu); |
c906108c | 7810 | break; |
d9fa45fe | 7811 | case DW_TAG_namespace: |
cdc07690 | 7812 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7813 | break; |
5d7cb8df | 7814 | case DW_TAG_module: |
cdc07690 | 7815 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 7816 | break; |
95554aad TT |
7817 | case DW_TAG_imported_unit: |
7818 | { | |
7819 | struct dwarf2_per_cu_data *per_cu; | |
7820 | ||
f4dc4d17 DE |
7821 | /* For now we don't handle imported units in type units. */ |
7822 | if (cu->per_cu->is_debug_types) | |
7823 | { | |
7824 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7825 | " supported in type units [in module %s]"), | |
4262abfb | 7826 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
7827 | } |
7828 | ||
9c541725 | 7829 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 7830 | pdi->is_dwz, |
95554aad TT |
7831 | cu->objfile); |
7832 | ||
7833 | /* Go read the partial unit, if needed. */ | |
7834 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 7835 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 7836 | |
f4dc4d17 | 7837 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 7838 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
7839 | } |
7840 | break; | |
74921315 KS |
7841 | case DW_TAG_imported_declaration: |
7842 | add_partial_symbol (pdi, cu); | |
7843 | break; | |
c906108c SS |
7844 | default: |
7845 | break; | |
7846 | } | |
7847 | } | |
7848 | ||
72bf9492 DJ |
7849 | /* If the die has a sibling, skip to the sibling. */ |
7850 | ||
7851 | pdi = pdi->die_sibling; | |
7852 | } | |
7853 | } | |
7854 | ||
7855 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7856 | |
72bf9492 | 7857 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7858 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7859 | Enumerators are an exception; they use the scope of their parent |
7860 | enumeration type, i.e. the name of the enumeration type is not | |
7861 | prepended to the enumerator. | |
91c24f0a | 7862 | |
72bf9492 DJ |
7863 | There are two complexities. One is DW_AT_specification; in this |
7864 | case "parent" means the parent of the target of the specification, | |
7865 | instead of the direct parent of the DIE. The other is compilers | |
7866 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7867 | the fully qualified name of structure types from their members' | |
7868 | linkage names. This must be done using the DIE's children rather | |
7869 | than the children of any DW_AT_specification target. We only need | |
7870 | to do this for structures at the top level, i.e. if the target of | |
7871 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7872 | have a parent. */ | |
7873 | ||
7874 | /* Compute the scope prefix associated with PDI's parent, in | |
7875 | compilation unit CU. The result will be allocated on CU's | |
7876 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7877 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7878 | static const char * |
72bf9492 DJ |
7879 | partial_die_parent_scope (struct partial_die_info *pdi, |
7880 | struct dwarf2_cu *cu) | |
7881 | { | |
15d034d0 | 7882 | const char *grandparent_scope; |
72bf9492 | 7883 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7884 | |
72bf9492 DJ |
7885 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7886 | then this means the parent of the specification DIE. */ | |
7887 | ||
7888 | real_pdi = pdi; | |
72bf9492 | 7889 | while (real_pdi->has_specification) |
36586728 TT |
7890 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7891 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7892 | |
7893 | parent = real_pdi->die_parent; | |
7894 | if (parent == NULL) | |
7895 | return NULL; | |
7896 | ||
7897 | if (parent->scope_set) | |
7898 | return parent->scope; | |
7899 | ||
7900 | fixup_partial_die (parent, cu); | |
7901 | ||
10b3939b | 7902 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7903 | |
acebe513 UW |
7904 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7905 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7906 | Work around this problem here. */ | |
7907 | if (cu->language == language_cplus | |
6e70227d | 7908 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7909 | && strcmp (parent->name, "::") == 0 |
7910 | && grandparent_scope == NULL) | |
7911 | { | |
7912 | parent->scope = NULL; | |
7913 | parent->scope_set = 1; | |
7914 | return NULL; | |
7915 | } | |
7916 | ||
9c6c53f7 SA |
7917 | if (pdi->tag == DW_TAG_enumerator) |
7918 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7919 | parent->scope = grandparent_scope; | |
7920 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7921 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7922 | || parent->tag == DW_TAG_structure_type |
7923 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7924 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7925 | || parent->tag == DW_TAG_union_type |
7926 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7927 | { |
7928 | if (grandparent_scope == NULL) | |
7929 | parent->scope = parent->name; | |
7930 | else | |
3e43a32a MS |
7931 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7932 | grandparent_scope, | |
f55ee35c | 7933 | parent->name, 0, cu); |
72bf9492 | 7934 | } |
72bf9492 DJ |
7935 | else |
7936 | { | |
7937 | /* FIXME drow/2004-04-01: What should we be doing with | |
7938 | function-local names? For partial symbols, we should probably be | |
7939 | ignoring them. */ | |
7940 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7941 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7942 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7943 | parent->scope = grandparent_scope; |
c906108c SS |
7944 | } |
7945 | ||
72bf9492 DJ |
7946 | parent->scope_set = 1; |
7947 | return parent->scope; | |
7948 | } | |
7949 | ||
7950 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7951 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7952 | |
72bf9492 DJ |
7953 | static char * |
7954 | partial_die_full_name (struct partial_die_info *pdi, | |
7955 | struct dwarf2_cu *cu) | |
7956 | { | |
15d034d0 | 7957 | const char *parent_scope; |
72bf9492 | 7958 | |
98bfdba5 PA |
7959 | /* If this is a template instantiation, we can not work out the |
7960 | template arguments from partial DIEs. So, unfortunately, we have | |
7961 | to go through the full DIEs. At least any work we do building | |
7962 | types here will be reused if full symbols are loaded later. */ | |
7963 | if (pdi->has_template_arguments) | |
7964 | { | |
7965 | fixup_partial_die (pdi, cu); | |
7966 | ||
7967 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7968 | { | |
7969 | struct die_info *die; | |
7970 | struct attribute attr; | |
7971 | struct dwarf2_cu *ref_cu = cu; | |
7972 | ||
b64f50a1 | 7973 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7974 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7975 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7976 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7977 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7978 | ||
7979 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7980 | } | |
7981 | } | |
7982 | ||
72bf9492 DJ |
7983 | parent_scope = partial_die_parent_scope (pdi, cu); |
7984 | if (parent_scope == NULL) | |
7985 | return NULL; | |
7986 | else | |
f55ee35c | 7987 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7988 | } |
7989 | ||
7990 | static void | |
72bf9492 | 7991 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7992 | { |
e7c27a73 | 7993 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7994 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7995 | CORE_ADDR addr = 0; |
15d034d0 | 7996 | const char *actual_name = NULL; |
e142c38c | 7997 | CORE_ADDR baseaddr; |
15d034d0 | 7998 | char *built_actual_name; |
e142c38c DJ |
7999 | |
8000 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 8001 | |
15d034d0 TT |
8002 | built_actual_name = partial_die_full_name (pdi, cu); |
8003 | if (built_actual_name != NULL) | |
8004 | actual_name = built_actual_name; | |
63d06c5c | 8005 | |
72bf9492 DJ |
8006 | if (actual_name == NULL) |
8007 | actual_name = pdi->name; | |
8008 | ||
c906108c SS |
8009 | switch (pdi->tag) |
8010 | { | |
8011 | case DW_TAG_subprogram: | |
3e29f34a | 8012 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 8013 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 8014 | { |
2cfa0c8d JB |
8015 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
8016 | of the global scope. But in Ada, we want to be able to access | |
8017 | nested procedures globally. So all Ada subprograms are stored | |
8018 | in the global scope. */ | |
f47fb265 | 8019 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8020 | built_actual_name != NULL, |
f47fb265 MS |
8021 | VAR_DOMAIN, LOC_BLOCK, |
8022 | &objfile->global_psymbols, | |
1762568f | 8023 | addr, cu->language, objfile); |
c906108c SS |
8024 | } |
8025 | else | |
8026 | { | |
f47fb265 | 8027 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8028 | built_actual_name != NULL, |
f47fb265 MS |
8029 | VAR_DOMAIN, LOC_BLOCK, |
8030 | &objfile->static_psymbols, | |
1762568f | 8031 | addr, cu->language, objfile); |
c906108c | 8032 | } |
0c1b455e TT |
8033 | |
8034 | if (pdi->main_subprogram && actual_name != NULL) | |
8035 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8036 | break; |
72929c62 JB |
8037 | case DW_TAG_constant: |
8038 | { | |
af5bf4ad | 8039 | std::vector<partial_symbol *> *list; |
72929c62 JB |
8040 | |
8041 | if (pdi->is_external) | |
8042 | list = &objfile->global_psymbols; | |
8043 | else | |
8044 | list = &objfile->static_psymbols; | |
f47fb265 | 8045 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8046 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 8047 | list, 0, cu->language, objfile); |
72929c62 JB |
8048 | } |
8049 | break; | |
c906108c | 8050 | case DW_TAG_variable: |
95554aad TT |
8051 | if (pdi->d.locdesc) |
8052 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8053 | |
95554aad | 8054 | if (pdi->d.locdesc |
caac4577 JG |
8055 | && addr == 0 |
8056 | && !dwarf2_per_objfile->has_section_at_zero) | |
8057 | { | |
8058 | /* A global or static variable may also have been stripped | |
8059 | out by the linker if unused, in which case its address | |
8060 | will be nullified; do not add such variables into partial | |
8061 | symbol table then. */ | |
8062 | } | |
8063 | else if (pdi->is_external) | |
c906108c SS |
8064 | { |
8065 | /* Global Variable. | |
8066 | Don't enter into the minimal symbol tables as there is | |
8067 | a minimal symbol table entry from the ELF symbols already. | |
8068 | Enter into partial symbol table if it has a location | |
8069 | descriptor or a type. | |
8070 | If the location descriptor is missing, new_symbol will create | |
8071 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8072 | be determined from the minimal symbol table whenever the variable | |
8073 | is referenced. | |
8074 | The address for the partial symbol table entry is not | |
8075 | used by GDB, but it comes in handy for debugging partial symbol | |
8076 | table building. */ | |
8077 | ||
95554aad | 8078 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 8079 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8080 | built_actual_name != NULL, |
f47fb265 MS |
8081 | VAR_DOMAIN, LOC_STATIC, |
8082 | &objfile->global_psymbols, | |
1762568f | 8083 | addr + baseaddr, |
f47fb265 | 8084 | cu->language, objfile); |
c906108c SS |
8085 | } |
8086 | else | |
8087 | { | |
ff908ebf AW |
8088 | int has_loc = pdi->d.locdesc != NULL; |
8089 | ||
8090 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8091 | without location descriptors or constant values). */ | |
8092 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 8093 | { |
15d034d0 | 8094 | xfree (built_actual_name); |
decbce07 MS |
8095 | return; |
8096 | } | |
ff908ebf | 8097 | |
f47fb265 | 8098 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8099 | built_actual_name != NULL, |
f47fb265 MS |
8100 | VAR_DOMAIN, LOC_STATIC, |
8101 | &objfile->static_psymbols, | |
ff908ebf | 8102 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 8103 | cu->language, objfile); |
c906108c SS |
8104 | } |
8105 | break; | |
8106 | case DW_TAG_typedef: | |
8107 | case DW_TAG_base_type: | |
a02abb62 | 8108 | case DW_TAG_subrange_type: |
38d518c9 | 8109 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8110 | built_actual_name != NULL, |
176620f1 | 8111 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 8112 | &objfile->static_psymbols, |
1762568f | 8113 | 0, cu->language, objfile); |
c906108c | 8114 | break; |
74921315 | 8115 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
8116 | case DW_TAG_namespace: |
8117 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 8118 | built_actual_name != NULL, |
72bf9492 DJ |
8119 | VAR_DOMAIN, LOC_TYPEDEF, |
8120 | &objfile->global_psymbols, | |
1762568f | 8121 | 0, cu->language, objfile); |
72bf9492 | 8122 | break; |
530e8392 KB |
8123 | case DW_TAG_module: |
8124 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
8125 | built_actual_name != NULL, | |
8126 | MODULE_DOMAIN, LOC_TYPEDEF, | |
8127 | &objfile->global_psymbols, | |
1762568f | 8128 | 0, cu->language, objfile); |
530e8392 | 8129 | break; |
c906108c | 8130 | case DW_TAG_class_type: |
680b30c7 | 8131 | case DW_TAG_interface_type: |
c906108c SS |
8132 | case DW_TAG_structure_type: |
8133 | case DW_TAG_union_type: | |
8134 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8135 | /* Skip external references. The DWARF standard says in the section |
8136 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8137 | structure, union or class type is represented by a structure, | |
8138 | union or class entry that does not have a byte size attribute | |
8139 | and that has a DW_AT_declaration attribute." */ | |
8140 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 8141 | { |
15d034d0 | 8142 | xfree (built_actual_name); |
decbce07 MS |
8143 | return; |
8144 | } | |
fa4028e9 | 8145 | |
63d06c5c DC |
8146 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8147 | static vs. global. */ | |
38d518c9 | 8148 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8149 | built_actual_name != NULL, |
176620f1 | 8150 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 8151 | cu->language == language_cplus |
63d06c5c DC |
8152 | ? &objfile->global_psymbols |
8153 | : &objfile->static_psymbols, | |
1762568f | 8154 | 0, cu->language, objfile); |
c906108c | 8155 | |
c906108c SS |
8156 | break; |
8157 | case DW_TAG_enumerator: | |
38d518c9 | 8158 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8159 | built_actual_name != NULL, |
176620f1 | 8160 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 8161 | cu->language == language_cplus |
f6fe98ef DJ |
8162 | ? &objfile->global_psymbols |
8163 | : &objfile->static_psymbols, | |
1762568f | 8164 | 0, cu->language, objfile); |
c906108c SS |
8165 | break; |
8166 | default: | |
8167 | break; | |
8168 | } | |
5c4e30ca | 8169 | |
15d034d0 | 8170 | xfree (built_actual_name); |
c906108c SS |
8171 | } |
8172 | ||
5c4e30ca DC |
8173 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8174 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8175 | the name of the enclosing namespace. */ | |
91c24f0a | 8176 | |
72bf9492 DJ |
8177 | static void |
8178 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8179 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8180 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8181 | { |
72bf9492 | 8182 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8183 | |
72bf9492 | 8184 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8185 | |
8186 | /* Now scan partial symbols in that namespace. */ | |
8187 | ||
91c24f0a | 8188 | if (pdi->has_children) |
cdc07690 | 8189 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8190 | } |
8191 | ||
5d7cb8df JK |
8192 | /* Read a partial die corresponding to a Fortran module. */ |
8193 | ||
8194 | static void | |
8195 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8196 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8197 | { |
530e8392 KB |
8198 | /* Add a symbol for the namespace. */ |
8199 | ||
8200 | add_partial_symbol (pdi, cu); | |
8201 | ||
f55ee35c | 8202 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8203 | |
8204 | if (pdi->has_children) | |
cdc07690 | 8205 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8206 | } |
8207 | ||
bc30ff58 JB |
8208 | /* Read a partial die corresponding to a subprogram and create a partial |
8209 | symbol for that subprogram. When the CU language allows it, this | |
8210 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 8211 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
8212 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
8213 | and highest PC values found in PDI. | |
6e70227d | 8214 | |
cdc07690 YQ |
8215 | PDI may also be a lexical block, in which case we simply search |
8216 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8217 | Again, this is only performed when the CU language allows this |
8218 | type of definitions. */ | |
8219 | ||
8220 | static void | |
8221 | add_partial_subprogram (struct partial_die_info *pdi, | |
8222 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8223 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
8224 | { |
8225 | if (pdi->tag == DW_TAG_subprogram) | |
8226 | { | |
8227 | if (pdi->has_pc_info) | |
8228 | { | |
8229 | if (pdi->lowpc < *lowpc) | |
8230 | *lowpc = pdi->lowpc; | |
8231 | if (pdi->highpc > *highpc) | |
8232 | *highpc = pdi->highpc; | |
cdc07690 | 8233 | if (set_addrmap) |
5734ee8b | 8234 | { |
5734ee8b | 8235 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
8236 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
8237 | CORE_ADDR baseaddr; | |
8238 | CORE_ADDR highpc; | |
8239 | CORE_ADDR lowpc; | |
5734ee8b DJ |
8240 | |
8241 | baseaddr = ANOFFSET (objfile->section_offsets, | |
8242 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
8243 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
8244 | pdi->lowpc + baseaddr); | |
8245 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
8246 | pdi->highpc + baseaddr); | |
8247 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 8248 | cu->per_cu->v.psymtab); |
5734ee8b | 8249 | } |
481860b3 GB |
8250 | } |
8251 | ||
8252 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8253 | { | |
bc30ff58 | 8254 | if (!pdi->is_declaration) |
e8d05480 JB |
8255 | /* Ignore subprogram DIEs that do not have a name, they are |
8256 | illegal. Do not emit a complaint at this point, we will | |
8257 | do so when we convert this psymtab into a symtab. */ | |
8258 | if (pdi->name) | |
8259 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
8260 | } |
8261 | } | |
6e70227d | 8262 | |
bc30ff58 JB |
8263 | if (! pdi->has_children) |
8264 | return; | |
8265 | ||
8266 | if (cu->language == language_ada) | |
8267 | { | |
8268 | pdi = pdi->die_child; | |
8269 | while (pdi != NULL) | |
8270 | { | |
8271 | fixup_partial_die (pdi, cu); | |
8272 | if (pdi->tag == DW_TAG_subprogram | |
8273 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 8274 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8275 | pdi = pdi->die_sibling; |
8276 | } | |
8277 | } | |
8278 | } | |
8279 | ||
91c24f0a DC |
8280 | /* Read a partial die corresponding to an enumeration type. */ |
8281 | ||
72bf9492 DJ |
8282 | static void |
8283 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8284 | struct dwarf2_cu *cu) | |
91c24f0a | 8285 | { |
72bf9492 | 8286 | struct partial_die_info *pdi; |
91c24f0a DC |
8287 | |
8288 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8289 | add_partial_symbol (enum_pdi, cu); |
8290 | ||
8291 | pdi = enum_pdi->die_child; | |
8292 | while (pdi) | |
91c24f0a | 8293 | { |
72bf9492 | 8294 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 8295 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 8296 | else |
72bf9492 DJ |
8297 | add_partial_symbol (pdi, cu); |
8298 | pdi = pdi->die_sibling; | |
91c24f0a | 8299 | } |
91c24f0a DC |
8300 | } |
8301 | ||
6caca83c CC |
8302 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8303 | ||
8304 | static unsigned int | |
d521ce57 | 8305 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8306 | { |
8307 | unsigned int bytes_read; | |
8308 | ||
8309 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8310 | } | |
8311 | ||
4bb7a0a7 DJ |
8312 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
8313 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
8314 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8315 | the initial number. */ | |
8316 | ||
8317 | static struct abbrev_info * | |
d521ce57 | 8318 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 8319 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
8320 | { |
8321 | bfd *abfd = cu->objfile->obfd; | |
8322 | unsigned int abbrev_number; | |
8323 | struct abbrev_info *abbrev; | |
8324 | ||
8325 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
8326 | ||
8327 | if (abbrev_number == 0) | |
8328 | return NULL; | |
8329 | ||
433df2d4 | 8330 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
8331 | if (!abbrev) |
8332 | { | |
422b9917 DE |
8333 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
8334 | " at offset 0x%x [in module %s]"), | |
8335 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 8336 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8337 | } |
8338 | ||
8339 | return abbrev; | |
8340 | } | |
8341 | ||
93311388 DE |
8342 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8343 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8344 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8345 | ||
d521ce57 TT |
8346 | static const gdb_byte * |
8347 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8348 | { |
dee91e82 | 8349 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
8350 | struct abbrev_info *abbrev; |
8351 | unsigned int bytes_read; | |
8352 | ||
8353 | while (1) | |
8354 | { | |
8355 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
8356 | if (abbrev == NULL) | |
8357 | return info_ptr + bytes_read; | |
8358 | else | |
dee91e82 | 8359 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8360 | } |
8361 | } | |
8362 | ||
93311388 DE |
8363 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8364 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8365 | abbrev corresponding to that skipped uleb128 should be passed in |
8366 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8367 | children. */ | |
8368 | ||
d521ce57 TT |
8369 | static const gdb_byte * |
8370 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8371 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8372 | { |
8373 | unsigned int bytes_read; | |
8374 | struct attribute attr; | |
dee91e82 DE |
8375 | bfd *abfd = reader->abfd; |
8376 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8377 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8378 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8379 | unsigned int form, i; |
8380 | ||
8381 | for (i = 0; i < abbrev->num_attrs; i++) | |
8382 | { | |
8383 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8384 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8385 | { | |
dee91e82 | 8386 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 8387 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
8388 | complaint (&symfile_complaints, |
8389 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 8390 | else |
b9502d3f | 8391 | { |
9c541725 PA |
8392 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8393 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8394 | |
8395 | if (sibling_ptr < info_ptr) | |
8396 | complaint (&symfile_complaints, | |
8397 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
8398 | else if (sibling_ptr > reader->buffer_end) |
8399 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
8400 | else |
8401 | return sibling_ptr; | |
8402 | } | |
4bb7a0a7 DJ |
8403 | } |
8404 | ||
8405 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8406 | form = abbrev->attrs[i].form; | |
8407 | skip_attribute: | |
8408 | switch (form) | |
8409 | { | |
4bb7a0a7 | 8410 | case DW_FORM_ref_addr: |
ae411497 TT |
8411 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8412 | and later it is offset sized. */ | |
8413 | if (cu->header.version == 2) | |
8414 | info_ptr += cu->header.addr_size; | |
8415 | else | |
8416 | info_ptr += cu->header.offset_size; | |
8417 | break; | |
36586728 TT |
8418 | case DW_FORM_GNU_ref_alt: |
8419 | info_ptr += cu->header.offset_size; | |
8420 | break; | |
ae411497 | 8421 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8422 | info_ptr += cu->header.addr_size; |
8423 | break; | |
8424 | case DW_FORM_data1: | |
8425 | case DW_FORM_ref1: | |
8426 | case DW_FORM_flag: | |
8427 | info_ptr += 1; | |
8428 | break; | |
2dc7f7b3 | 8429 | case DW_FORM_flag_present: |
43988095 | 8430 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8431 | break; |
4bb7a0a7 DJ |
8432 | case DW_FORM_data2: |
8433 | case DW_FORM_ref2: | |
8434 | info_ptr += 2; | |
8435 | break; | |
8436 | case DW_FORM_data4: | |
8437 | case DW_FORM_ref4: | |
8438 | info_ptr += 4; | |
8439 | break; | |
8440 | case DW_FORM_data8: | |
8441 | case DW_FORM_ref8: | |
55f1336d | 8442 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8443 | info_ptr += 8; |
8444 | break; | |
0224619f JK |
8445 | case DW_FORM_data16: |
8446 | info_ptr += 16; | |
8447 | break; | |
4bb7a0a7 | 8448 | case DW_FORM_string: |
9b1c24c8 | 8449 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8450 | info_ptr += bytes_read; |
8451 | break; | |
2dc7f7b3 | 8452 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8453 | case DW_FORM_strp: |
36586728 | 8454 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8455 | info_ptr += cu->header.offset_size; |
8456 | break; | |
2dc7f7b3 | 8457 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8458 | case DW_FORM_block: |
8459 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8460 | info_ptr += bytes_read; | |
8461 | break; | |
8462 | case DW_FORM_block1: | |
8463 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8464 | break; | |
8465 | case DW_FORM_block2: | |
8466 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8467 | break; | |
8468 | case DW_FORM_block4: | |
8469 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8470 | break; | |
8471 | case DW_FORM_sdata: | |
8472 | case DW_FORM_udata: | |
8473 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8474 | case DW_FORM_GNU_addr_index: |
8475 | case DW_FORM_GNU_str_index: | |
d521ce57 | 8476 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8477 | break; |
8478 | case DW_FORM_indirect: | |
8479 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8480 | info_ptr += bytes_read; | |
8481 | /* We need to continue parsing from here, so just go back to | |
8482 | the top. */ | |
8483 | goto skip_attribute; | |
8484 | ||
8485 | default: | |
3e43a32a MS |
8486 | error (_("Dwarf Error: Cannot handle %s " |
8487 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8488 | dwarf_form_name (form), |
8489 | bfd_get_filename (abfd)); | |
8490 | } | |
8491 | } | |
8492 | ||
8493 | if (abbrev->has_children) | |
dee91e82 | 8494 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8495 | else |
8496 | return info_ptr; | |
8497 | } | |
8498 | ||
93311388 | 8499 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8500 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8501 | |
d521ce57 | 8502 | static const gdb_byte * |
dee91e82 DE |
8503 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8504 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8505 | const gdb_byte *info_ptr) |
91c24f0a DC |
8506 | { |
8507 | /* Do we know the sibling already? */ | |
72bf9492 | 8508 | |
91c24f0a DC |
8509 | if (orig_pdi->sibling) |
8510 | return orig_pdi->sibling; | |
8511 | ||
8512 | /* Are there any children to deal with? */ | |
8513 | ||
8514 | if (!orig_pdi->has_children) | |
8515 | return info_ptr; | |
8516 | ||
4bb7a0a7 | 8517 | /* Skip the children the long way. */ |
91c24f0a | 8518 | |
dee91e82 | 8519 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8520 | } |
8521 | ||
257e7a09 | 8522 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8523 | not NULL. */ |
c906108c SS |
8524 | |
8525 | static void | |
257e7a09 YQ |
8526 | dwarf2_read_symtab (struct partial_symtab *self, |
8527 | struct objfile *objfile) | |
c906108c | 8528 | { |
257e7a09 | 8529 | if (self->readin) |
c906108c | 8530 | { |
442e4d9c | 8531 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 8532 | self->filename); |
442e4d9c YQ |
8533 | } |
8534 | else | |
8535 | { | |
8536 | if (info_verbose) | |
c906108c | 8537 | { |
442e4d9c | 8538 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 8539 | self->filename); |
442e4d9c | 8540 | gdb_flush (gdb_stdout); |
c906108c | 8541 | } |
c906108c | 8542 | |
442e4d9c | 8543 | /* Restore our global data. */ |
9a3c8263 SM |
8544 | dwarf2_per_objfile |
8545 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
8546 | dwarf2_objfile_data_key); | |
10b3939b | 8547 | |
442e4d9c YQ |
8548 | /* If this psymtab is constructed from a debug-only objfile, the |
8549 | has_section_at_zero flag will not necessarily be correct. We | |
8550 | can get the correct value for this flag by looking at the data | |
8551 | associated with the (presumably stripped) associated objfile. */ | |
8552 | if (objfile->separate_debug_objfile_backlink) | |
8553 | { | |
8554 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
8555 | = ((struct dwarf2_per_objfile *) |
8556 | objfile_data (objfile->separate_debug_objfile_backlink, | |
8557 | dwarf2_objfile_data_key)); | |
9a619af0 | 8558 | |
442e4d9c YQ |
8559 | dwarf2_per_objfile->has_section_at_zero |
8560 | = dpo_backlink->has_section_at_zero; | |
8561 | } | |
b2ab525c | 8562 | |
442e4d9c | 8563 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 8564 | |
257e7a09 | 8565 | psymtab_to_symtab_1 (self); |
c906108c | 8566 | |
442e4d9c YQ |
8567 | /* Finish up the debug error message. */ |
8568 | if (info_verbose) | |
8569 | printf_filtered (_("done.\n")); | |
c906108c | 8570 | } |
95554aad TT |
8571 | |
8572 | process_cu_includes (); | |
c906108c | 8573 | } |
9cdd5dbd DE |
8574 | \f |
8575 | /* Reading in full CUs. */ | |
c906108c | 8576 | |
10b3939b DJ |
8577 | /* Add PER_CU to the queue. */ |
8578 | ||
8579 | static void | |
95554aad TT |
8580 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8581 | enum language pretend_language) | |
10b3939b DJ |
8582 | { |
8583 | struct dwarf2_queue_item *item; | |
8584 | ||
8585 | per_cu->queued = 1; | |
8d749320 | 8586 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 8587 | item->per_cu = per_cu; |
95554aad | 8588 | item->pretend_language = pretend_language; |
10b3939b DJ |
8589 | item->next = NULL; |
8590 | ||
8591 | if (dwarf2_queue == NULL) | |
8592 | dwarf2_queue = item; | |
8593 | else | |
8594 | dwarf2_queue_tail->next = item; | |
8595 | ||
8596 | dwarf2_queue_tail = item; | |
8597 | } | |
8598 | ||
89e63ee4 DE |
8599 | /* If PER_CU is not yet queued, add it to the queue. |
8600 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8601 | dependency. | |
0907af0c | 8602 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8603 | meaning either PER_CU is already queued or it is already loaded. |
8604 | ||
8605 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8606 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8607 | |
8608 | static int | |
89e63ee4 | 8609 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8610 | struct dwarf2_per_cu_data *per_cu, |
8611 | enum language pretend_language) | |
8612 | { | |
8613 | /* We may arrive here during partial symbol reading, if we need full | |
8614 | DIEs to process an unusual case (e.g. template arguments). Do | |
8615 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
8616 | if (dwarf2_per_objfile->reading_partial_symbols) | |
8617 | { | |
8618 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8619 | return 1; | |
8620 | return 0; | |
8621 | } | |
8622 | ||
8623 | /* Mark the dependence relation so that we don't flush PER_CU | |
8624 | too early. */ | |
89e63ee4 DE |
8625 | if (dependent_cu != NULL) |
8626 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8627 | |
8628 | /* If it's already on the queue, we have nothing to do. */ | |
8629 | if (per_cu->queued) | |
8630 | return 0; | |
8631 | ||
8632 | /* If the compilation unit is already loaded, just mark it as | |
8633 | used. */ | |
8634 | if (per_cu->cu != NULL) | |
8635 | { | |
8636 | per_cu->cu->last_used = 0; | |
8637 | return 0; | |
8638 | } | |
8639 | ||
8640 | /* Add it to the queue. */ | |
8641 | queue_comp_unit (per_cu, pretend_language); | |
8642 | ||
8643 | return 1; | |
8644 | } | |
8645 | ||
10b3939b DJ |
8646 | /* Process the queue. */ |
8647 | ||
8648 | static void | |
a0f42c21 | 8649 | process_queue (void) |
10b3939b DJ |
8650 | { |
8651 | struct dwarf2_queue_item *item, *next_item; | |
8652 | ||
b4f54984 | 8653 | if (dwarf_read_debug) |
45cfd468 DE |
8654 | { |
8655 | fprintf_unfiltered (gdb_stdlog, | |
8656 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8657 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8658 | } |
8659 | ||
03dd20cc DJ |
8660 | /* The queue starts out with one item, but following a DIE reference |
8661 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
8662 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
8663 | { | |
cc12ce38 DE |
8664 | if ((dwarf2_per_objfile->using_index |
8665 | ? !item->per_cu->v.quick->compunit_symtab | |
8666 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
8667 | /* Skip dummy CUs. */ | |
8668 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
8669 | { |
8670 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 8671 | unsigned int debug_print_threshold; |
247f5c4f | 8672 | char buf[100]; |
f4dc4d17 | 8673 | |
247f5c4f | 8674 | if (per_cu->is_debug_types) |
f4dc4d17 | 8675 | { |
247f5c4f DE |
8676 | struct signatured_type *sig_type = |
8677 | (struct signatured_type *) per_cu; | |
8678 | ||
8679 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 8680 | hex_string (sig_type->signature), |
9c541725 | 8681 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
8682 | /* There can be 100s of TUs. |
8683 | Only print them in verbose mode. */ | |
8684 | debug_print_threshold = 2; | |
f4dc4d17 | 8685 | } |
247f5c4f | 8686 | else |
73be47f5 | 8687 | { |
9c541725 PA |
8688 | sprintf (buf, "CU at offset 0x%x", |
8689 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
8690 | debug_print_threshold = 1; |
8691 | } | |
247f5c4f | 8692 | |
b4f54984 | 8693 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8694 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8695 | |
8696 | if (per_cu->is_debug_types) | |
8697 | process_full_type_unit (per_cu, item->pretend_language); | |
8698 | else | |
8699 | process_full_comp_unit (per_cu, item->pretend_language); | |
8700 | ||
b4f54984 | 8701 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8702 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8703 | } |
10b3939b DJ |
8704 | |
8705 | item->per_cu->queued = 0; | |
8706 | next_item = item->next; | |
8707 | xfree (item); | |
8708 | } | |
8709 | ||
8710 | dwarf2_queue_tail = NULL; | |
45cfd468 | 8711 | |
b4f54984 | 8712 | if (dwarf_read_debug) |
45cfd468 DE |
8713 | { |
8714 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8715 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8716 | } |
10b3939b DJ |
8717 | } |
8718 | ||
8719 | /* Free all allocated queue entries. This function only releases anything if | |
8720 | an error was thrown; if the queue was processed then it would have been | |
8721 | freed as we went along. */ | |
8722 | ||
8723 | static void | |
8724 | dwarf2_release_queue (void *dummy) | |
8725 | { | |
8726 | struct dwarf2_queue_item *item, *last; | |
8727 | ||
8728 | item = dwarf2_queue; | |
8729 | while (item) | |
8730 | { | |
8731 | /* Anything still marked queued is likely to be in an | |
8732 | inconsistent state, so discard it. */ | |
8733 | if (item->per_cu->queued) | |
8734 | { | |
8735 | if (item->per_cu->cu != NULL) | |
dee91e82 | 8736 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
8737 | item->per_cu->queued = 0; |
8738 | } | |
8739 | ||
8740 | last = item; | |
8741 | item = item->next; | |
8742 | xfree (last); | |
8743 | } | |
8744 | ||
8745 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
8746 | } | |
8747 | ||
8748 | /* Read in full symbols for PST, and anything it depends on. */ | |
8749 | ||
c906108c | 8750 | static void |
fba45db2 | 8751 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 8752 | { |
10b3939b | 8753 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
8754 | int i; |
8755 | ||
95554aad TT |
8756 | if (pst->readin) |
8757 | return; | |
8758 | ||
aaa75496 | 8759 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
8760 | if (!pst->dependencies[i]->readin |
8761 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
8762 | { |
8763 | /* Inform about additional files that need to be read in. */ | |
8764 | if (info_verbose) | |
8765 | { | |
a3f17187 | 8766 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
8767 | fputs_filtered (" ", gdb_stdout); |
8768 | wrap_here (""); | |
8769 | fputs_filtered ("and ", gdb_stdout); | |
8770 | wrap_here (""); | |
8771 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 8772 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
8773 | gdb_flush (gdb_stdout); |
8774 | } | |
8775 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
8776 | } | |
8777 | ||
9a3c8263 | 8778 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
8779 | |
8780 | if (per_cu == NULL) | |
aaa75496 JB |
8781 | { |
8782 | /* It's an include file, no symbols to read for it. | |
8783 | Everything is in the parent symtab. */ | |
8784 | pst->readin = 1; | |
8785 | return; | |
8786 | } | |
c906108c | 8787 | |
a0f42c21 | 8788 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
8789 | } |
8790 | ||
dee91e82 DE |
8791 | /* Trivial hash function for die_info: the hash value of a DIE |
8792 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8793 | |
dee91e82 DE |
8794 | static hashval_t |
8795 | die_hash (const void *item) | |
10b3939b | 8796 | { |
9a3c8263 | 8797 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8798 | |
9c541725 | 8799 | return to_underlying (die->sect_off); |
dee91e82 | 8800 | } |
63d06c5c | 8801 | |
dee91e82 DE |
8802 | /* Trivial comparison function for die_info structures: two DIEs |
8803 | are equal if they have the same offset. */ | |
98bfdba5 | 8804 | |
dee91e82 DE |
8805 | static int |
8806 | die_eq (const void *item_lhs, const void *item_rhs) | |
8807 | { | |
9a3c8263 SM |
8808 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8809 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8810 | |
9c541725 | 8811 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8812 | } |
c906108c | 8813 | |
dee91e82 DE |
8814 | /* die_reader_func for load_full_comp_unit. |
8815 | This is identical to read_signatured_type_reader, | |
8816 | but is kept separate for now. */ | |
c906108c | 8817 | |
dee91e82 DE |
8818 | static void |
8819 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8820 | const gdb_byte *info_ptr, |
dee91e82 DE |
8821 | struct die_info *comp_unit_die, |
8822 | int has_children, | |
8823 | void *data) | |
8824 | { | |
8825 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 8826 | enum language *language_ptr = (enum language *) data; |
6caca83c | 8827 | |
dee91e82 DE |
8828 | gdb_assert (cu->die_hash == NULL); |
8829 | cu->die_hash = | |
8830 | htab_create_alloc_ex (cu->header.length / 12, | |
8831 | die_hash, | |
8832 | die_eq, | |
8833 | NULL, | |
8834 | &cu->comp_unit_obstack, | |
8835 | hashtab_obstack_allocate, | |
8836 | dummy_obstack_deallocate); | |
e142c38c | 8837 | |
dee91e82 DE |
8838 | if (has_children) |
8839 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
8840 | &info_ptr, comp_unit_die); | |
8841 | cu->dies = comp_unit_die; | |
8842 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
8843 | |
8844 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8845 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8846 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8847 | or we won't be able to build types correctly. |
8848 | Similarly, if we do not read the producer, we can not apply | |
8849 | producer-specific interpretation. */ | |
95554aad | 8850 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 8851 | } |
10b3939b | 8852 | |
dee91e82 | 8853 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 8854 | |
dee91e82 | 8855 | static void |
95554aad TT |
8856 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8857 | enum language pretend_language) | |
dee91e82 | 8858 | { |
3019eac3 | 8859 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 8860 | |
f4dc4d17 DE |
8861 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8862 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
8863 | } |
8864 | ||
3da10d80 KS |
8865 | /* Add a DIE to the delayed physname list. */ |
8866 | ||
8867 | static void | |
8868 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8869 | const char *name, struct die_info *die, | |
8870 | struct dwarf2_cu *cu) | |
8871 | { | |
8872 | struct delayed_method_info mi; | |
8873 | mi.type = type; | |
8874 | mi.fnfield_index = fnfield_index; | |
8875 | mi.index = index; | |
8876 | mi.name = name; | |
8877 | mi.die = die; | |
8878 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8879 | } | |
8880 | ||
8881 | /* A cleanup for freeing the delayed method list. */ | |
8882 | ||
8883 | static void | |
8884 | free_delayed_list (void *ptr) | |
8885 | { | |
8886 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8887 | if (cu->method_list != NULL) | |
8888 | { | |
8889 | VEC_free (delayed_method_info, cu->method_list); | |
8890 | cu->method_list = NULL; | |
8891 | } | |
8892 | } | |
8893 | ||
3693fdb3 PA |
8894 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8895 | "const" / "volatile". If so, decrements LEN by the length of the | |
8896 | modifier and return true. Otherwise return false. */ | |
8897 | ||
8898 | template<size_t N> | |
8899 | static bool | |
8900 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8901 | { | |
8902 | size_t mod_len = sizeof (mod) - 1; | |
8903 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8904 | { | |
8905 | len -= mod_len; | |
8906 | return true; | |
8907 | } | |
8908 | return false; | |
8909 | } | |
8910 | ||
3da10d80 KS |
8911 | /* Compute the physnames of any methods on the CU's method list. |
8912 | ||
8913 | The computation of method physnames is delayed in order to avoid the | |
8914 | (bad) condition that one of the method's formal parameters is of an as yet | |
8915 | incomplete type. */ | |
8916 | ||
8917 | static void | |
8918 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8919 | { | |
8920 | int i; | |
8921 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8922 | |
8923 | /* Only C++ delays computing physnames. */ | |
8924 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8925 | return; | |
8926 | gdb_assert (cu->language == language_cplus); | |
8927 | ||
3da10d80 KS |
8928 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8929 | { | |
1d06ead6 | 8930 | const char *physname; |
3da10d80 KS |
8931 | struct fn_fieldlist *fn_flp |
8932 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8933 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8934 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8935 | = physname ? physname : ""; | |
3693fdb3 PA |
8936 | |
8937 | /* Since there's no tag to indicate whether a method is a | |
8938 | const/volatile overload, extract that information out of the | |
8939 | demangled name. */ | |
8940 | if (physname != NULL) | |
8941 | { | |
8942 | size_t len = strlen (physname); | |
8943 | ||
8944 | while (1) | |
8945 | { | |
8946 | if (physname[len] == ')') /* shortcut */ | |
8947 | break; | |
8948 | else if (check_modifier (physname, len, " const")) | |
8949 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8950 | else if (check_modifier (physname, len, " volatile")) | |
8951 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8952 | else | |
8953 | break; | |
8954 | } | |
8955 | } | |
3da10d80 KS |
8956 | } |
8957 | } | |
8958 | ||
a766d390 DE |
8959 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8960 | and it's not clear if/how imported objects will appear. | |
8961 | To keep Go support simple until that's worked out, | |
8962 | go back through what we've read and create something usable. | |
8963 | We could do this while processing each DIE, and feels kinda cleaner, | |
8964 | but that way is more invasive. | |
8965 | This is to, for example, allow the user to type "p var" or "b main" | |
8966 | without having to specify the package name, and allow lookups | |
8967 | of module.object to work in contexts that use the expression | |
8968 | parser. */ | |
8969 | ||
8970 | static void | |
8971 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8972 | { | |
8973 | char *package_name = NULL; | |
8974 | struct pending *list; | |
8975 | int i; | |
8976 | ||
8977 | for (list = global_symbols; list != NULL; list = list->next) | |
8978 | { | |
8979 | for (i = 0; i < list->nsyms; ++i) | |
8980 | { | |
8981 | struct symbol *sym = list->symbol[i]; | |
8982 | ||
8983 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8984 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8985 | { | |
8986 | char *this_package_name = go_symbol_package_name (sym); | |
8987 | ||
8988 | if (this_package_name == NULL) | |
8989 | continue; | |
8990 | if (package_name == NULL) | |
8991 | package_name = this_package_name; | |
8992 | else | |
8993 | { | |
8994 | if (strcmp (package_name, this_package_name) != 0) | |
8995 | complaint (&symfile_complaints, | |
8996 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8997 | (symbol_symtab (sym) != NULL |
8998 | ? symtab_to_filename_for_display | |
8999 | (symbol_symtab (sym)) | |
4262abfb | 9000 | : objfile_name (cu->objfile)), |
a766d390 DE |
9001 | this_package_name, package_name); |
9002 | xfree (this_package_name); | |
9003 | } | |
9004 | } | |
9005 | } | |
9006 | } | |
9007 | ||
9008 | if (package_name != NULL) | |
9009 | { | |
9010 | struct objfile *objfile = cu->objfile; | |
34a68019 | 9011 | const char *saved_package_name |
224c3ddb SM |
9012 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
9013 | package_name, | |
9014 | strlen (package_name)); | |
19f392bc UW |
9015 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9016 | saved_package_name); | |
a766d390 DE |
9017 | struct symbol *sym; |
9018 | ||
9019 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
9020 | ||
e623cf5d | 9021 | sym = allocate_symbol (objfile); |
f85f34ed | 9022 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
9023 | SYMBOL_SET_NAMES (sym, saved_package_name, |
9024 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
9025 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9026 | e.g., "main" finds the "main" module and not C's main(). */ | |
9027 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9028 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9029 | SYMBOL_TYPE (sym) = type; |
9030 | ||
9031 | add_symbol_to_list (sym, &global_symbols); | |
9032 | ||
9033 | xfree (package_name); | |
9034 | } | |
9035 | } | |
9036 | ||
95554aad TT |
9037 | /* Return the symtab for PER_CU. This works properly regardless of |
9038 | whether we're using the index or psymtabs. */ | |
9039 | ||
43f3e411 DE |
9040 | static struct compunit_symtab * |
9041 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
9042 | { |
9043 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
9044 | ? per_cu->v.quick->compunit_symtab |
9045 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
9046 | } |
9047 | ||
9048 | /* A helper function for computing the list of all symbol tables | |
9049 | included by PER_CU. */ | |
9050 | ||
9051 | static void | |
43f3e411 | 9052 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 9053 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 9054 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 9055 | struct compunit_symtab *immediate_parent) |
95554aad TT |
9056 | { |
9057 | void **slot; | |
9058 | int ix; | |
43f3e411 | 9059 | struct compunit_symtab *cust; |
95554aad TT |
9060 | struct dwarf2_per_cu_data *iter; |
9061 | ||
9062 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
9063 | if (*slot != NULL) | |
9064 | { | |
9065 | /* This inclusion and its children have been processed. */ | |
9066 | return; | |
9067 | } | |
9068 | ||
9069 | *slot = per_cu; | |
9070 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
9071 | cust = get_compunit_symtab (per_cu); |
9072 | if (cust != NULL) | |
ec94af83 DE |
9073 | { |
9074 | /* If this is a type unit only add its symbol table if we haven't | |
9075 | seen it yet (type unit per_cu's can share symtabs). */ | |
9076 | if (per_cu->is_debug_types) | |
9077 | { | |
43f3e411 | 9078 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9079 | if (*slot == NULL) |
9080 | { | |
43f3e411 DE |
9081 | *slot = cust; |
9082 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
9083 | if (cust->user == NULL) | |
9084 | cust->user = immediate_parent; | |
ec94af83 DE |
9085 | } |
9086 | } | |
9087 | else | |
f9125b6c | 9088 | { |
43f3e411 DE |
9089 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
9090 | if (cust->user == NULL) | |
9091 | cust->user = immediate_parent; | |
f9125b6c | 9092 | } |
ec94af83 | 9093 | } |
95554aad TT |
9094 | |
9095 | for (ix = 0; | |
796a7ff8 | 9096 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 9097 | ++ix) |
ec94af83 DE |
9098 | { |
9099 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 9100 | all_type_symtabs, iter, cust); |
ec94af83 | 9101 | } |
95554aad TT |
9102 | } |
9103 | ||
43f3e411 | 9104 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9105 | PER_CU. */ |
9106 | ||
9107 | static void | |
43f3e411 | 9108 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 9109 | { |
f4dc4d17 DE |
9110 | gdb_assert (! per_cu->is_debug_types); |
9111 | ||
796a7ff8 | 9112 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
9113 | { |
9114 | int ix, len; | |
ec94af83 | 9115 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
9116 | struct compunit_symtab *compunit_symtab_iter; |
9117 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 9118 | htab_t all_children, all_type_symtabs; |
43f3e411 | 9119 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
9120 | |
9121 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9122 | if (cust == NULL) |
95554aad TT |
9123 | return; |
9124 | ||
9125 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
9126 | NULL, xcalloc, xfree); | |
ec94af83 DE |
9127 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
9128 | NULL, xcalloc, xfree); | |
95554aad TT |
9129 | |
9130 | for (ix = 0; | |
796a7ff8 | 9131 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 9132 | ix, per_cu_iter); |
95554aad | 9133 | ++ix) |
ec94af83 DE |
9134 | { |
9135 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 9136 | all_type_symtabs, per_cu_iter, |
43f3e411 | 9137 | cust); |
ec94af83 | 9138 | } |
95554aad | 9139 | |
ec94af83 | 9140 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
9141 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
9142 | cust->includes | |
8d749320 SM |
9143 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
9144 | struct compunit_symtab *, len + 1); | |
95554aad | 9145 | for (ix = 0; |
43f3e411 DE |
9146 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
9147 | compunit_symtab_iter); | |
95554aad | 9148 | ++ix) |
43f3e411 DE |
9149 | cust->includes[ix] = compunit_symtab_iter; |
9150 | cust->includes[len] = NULL; | |
95554aad | 9151 | |
43f3e411 | 9152 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 9153 | htab_delete (all_children); |
ec94af83 | 9154 | htab_delete (all_type_symtabs); |
95554aad TT |
9155 | } |
9156 | } | |
9157 | ||
9158 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9159 | read. */ | |
9160 | ||
9161 | static void | |
9162 | process_cu_includes (void) | |
9163 | { | |
9164 | int ix; | |
9165 | struct dwarf2_per_cu_data *iter; | |
9166 | ||
9167 | for (ix = 0; | |
9168 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
9169 | ix, iter); | |
9170 | ++ix) | |
f4dc4d17 DE |
9171 | { |
9172 | if (! iter->is_debug_types) | |
43f3e411 | 9173 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 9174 | } |
95554aad TT |
9175 | |
9176 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
9177 | } | |
9178 | ||
9cdd5dbd | 9179 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
9180 | already been loaded into memory. */ |
9181 | ||
9182 | static void | |
95554aad TT |
9183 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9184 | enum language pretend_language) | |
10b3939b | 9185 | { |
10b3939b | 9186 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 9187 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 9188 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 9189 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9190 | struct compunit_symtab *cust; |
33c7c59d | 9191 | struct cleanup *delayed_list_cleanup; |
10b3939b | 9192 | CORE_ADDR baseaddr; |
4359dff1 | 9193 | struct block *static_block; |
3e29f34a | 9194 | CORE_ADDR addr; |
10b3939b DJ |
9195 | |
9196 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
9197 | ||
10b3939b | 9198 | buildsym_init (); |
33c7c59d | 9199 | scoped_free_pendings free_pending; |
3da10d80 | 9200 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
9201 | |
9202 | cu->list_in_scope = &file_symbols; | |
c906108c | 9203 | |
95554aad TT |
9204 | cu->language = pretend_language; |
9205 | cu->language_defn = language_def (cu->language); | |
9206 | ||
c906108c | 9207 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9208 | process_die (cu->dies, cu); |
c906108c | 9209 | |
a766d390 DE |
9210 | /* For now fudge the Go package. */ |
9211 | if (cu->language == language_go) | |
9212 | fixup_go_packaging (cu); | |
9213 | ||
3da10d80 KS |
9214 | /* Now that we have processed all the DIEs in the CU, all the types |
9215 | should be complete, and it should now be safe to compute all of the | |
9216 | physnames. */ | |
9217 | compute_delayed_physnames (cu); | |
9218 | do_cleanups (delayed_list_cleanup); | |
9219 | ||
fae299cd DC |
9220 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9221 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9222 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9223 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9224 | |
3e29f34a MR |
9225 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
9226 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
9227 | |
9228 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9229 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9230 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9231 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9232 | this comp unit. */ | |
9233 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9234 | ||
43f3e411 DE |
9235 | cust = end_symtab_from_static_block (static_block, |
9236 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 9237 | |
43f3e411 | 9238 | if (cust != NULL) |
c906108c | 9239 | { |
df15bd07 | 9240 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9241 | |
8be455d7 JK |
9242 | /* Set symtab language to language from DW_AT_language. If the |
9243 | compilation is from a C file generated by language preprocessors, do | |
9244 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9245 | if (!(cu->language == language_c |
40e3ad0e | 9246 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9247 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9248 | |
9249 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9250 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9251 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9252 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9253 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9254 | |
9255 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9256 | needed, it would be wrong due to missing DW_AT_producer there. | |
9257 | ||
9258 | Still one can confuse GDB by using non-standard GCC compilation | |
9259 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
9260 | */ | |
ab260dad | 9261 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9262 | cust->locations_valid = 1; |
e0d00bc7 JK |
9263 | |
9264 | if (gcc_4_minor >= 5) | |
43f3e411 | 9265 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9266 | |
43f3e411 | 9267 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9268 | } |
9291a0cd TT |
9269 | |
9270 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9271 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
9272 | else |
9273 | { | |
9274 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9275 | pst->compunit_symtab = cust; |
9291a0cd TT |
9276 | pst->readin = 1; |
9277 | } | |
c906108c | 9278 | |
95554aad TT |
9279 | /* Push it for inclusion processing later. */ |
9280 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
f4dc4d17 | 9281 | } |
45cfd468 | 9282 | |
f4dc4d17 DE |
9283 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9284 | already been loaded into memory. */ | |
9285 | ||
9286 | static void | |
9287 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9288 | enum language pretend_language) | |
9289 | { | |
9290 | struct dwarf2_cu *cu = per_cu->cu; | |
9291 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 9292 | struct compunit_symtab *cust; |
33c7c59d | 9293 | struct cleanup *delayed_list_cleanup; |
0186c6a7 DE |
9294 | struct signatured_type *sig_type; |
9295 | ||
9296 | gdb_assert (per_cu->is_debug_types); | |
9297 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
9298 | |
9299 | buildsym_init (); | |
33c7c59d | 9300 | scoped_free_pendings free_pending; |
f4dc4d17 DE |
9301 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
9302 | ||
9303 | cu->list_in_scope = &file_symbols; | |
9304 | ||
9305 | cu->language = pretend_language; | |
9306 | cu->language_defn = language_def (cu->language); | |
9307 | ||
9308 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9309 | process_die (cu->dies, cu); | |
9310 | ||
9311 | /* For now fudge the Go package. */ | |
9312 | if (cu->language == language_go) | |
9313 | fixup_go_packaging (cu); | |
9314 | ||
9315 | /* Now that we have processed all the DIEs in the CU, all the types | |
9316 | should be complete, and it should now be safe to compute all of the | |
9317 | physnames. */ | |
9318 | compute_delayed_physnames (cu); | |
9319 | do_cleanups (delayed_list_cleanup); | |
9320 | ||
9321 | /* TUs share symbol tables. | |
9322 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9323 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9324 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9325 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9326 | { |
43f3e411 DE |
9327 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
9328 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 9329 | |
43f3e411 | 9330 | if (cust != NULL) |
f4dc4d17 DE |
9331 | { |
9332 | /* Set symtab language to language from DW_AT_language. If the | |
9333 | compilation is from a C file generated by language preprocessors, | |
9334 | do not set the language if it was already deduced by | |
9335 | start_subfile. */ | |
43f3e411 DE |
9336 | if (!(cu->language == language_c |
9337 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9338 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9339 | } |
9340 | } | |
9341 | else | |
9342 | { | |
0ab9ce85 | 9343 | augment_type_symtab (); |
43f3e411 | 9344 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9345 | } |
9346 | ||
9347 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9348 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9349 | else |
9350 | { | |
9351 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9352 | pst->compunit_symtab = cust; |
f4dc4d17 | 9353 | pst->readin = 1; |
45cfd468 | 9354 | } |
c906108c SS |
9355 | } |
9356 | ||
95554aad TT |
9357 | /* Process an imported unit DIE. */ |
9358 | ||
9359 | static void | |
9360 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9361 | { | |
9362 | struct attribute *attr; | |
9363 | ||
f4dc4d17 DE |
9364 | /* For now we don't handle imported units in type units. */ |
9365 | if (cu->per_cu->is_debug_types) | |
9366 | { | |
9367 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9368 | " supported in type units [in module %s]"), | |
4262abfb | 9369 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
9370 | } |
9371 | ||
95554aad TT |
9372 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9373 | if (attr != NULL) | |
9374 | { | |
9c541725 PA |
9375 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9376 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9377 | dwarf2_per_cu_data *per_cu | |
9378 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 9379 | |
69d751e3 | 9380 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
9381 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
9382 | load_full_comp_unit (per_cu, cu->language); | |
9383 | ||
796a7ff8 | 9384 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
9385 | per_cu); |
9386 | } | |
9387 | } | |
9388 | ||
4c8aa72d PA |
9389 | /* RAII object that represents a process_die scope: i.e., |
9390 | starts/finishes processing a DIE. */ | |
9391 | class process_die_scope | |
adde2bff | 9392 | { |
4c8aa72d PA |
9393 | public: |
9394 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9395 | : m_die (die), m_cu (cu) | |
9396 | { | |
9397 | /* We should only be processing DIEs not already in process. */ | |
9398 | gdb_assert (!m_die->in_process); | |
9399 | m_die->in_process = true; | |
9400 | } | |
8c3cb9fa | 9401 | |
4c8aa72d PA |
9402 | ~process_die_scope () |
9403 | { | |
9404 | m_die->in_process = false; | |
9405 | ||
9406 | /* If we're done processing the DIE for the CU that owns the line | |
9407 | header, we don't need the line header anymore. */ | |
9408 | if (m_cu->line_header_die_owner == m_die) | |
9409 | { | |
9410 | delete m_cu->line_header; | |
9411 | m_cu->line_header = NULL; | |
9412 | m_cu->line_header_die_owner = NULL; | |
9413 | } | |
9414 | } | |
9415 | ||
9416 | private: | |
9417 | die_info *m_die; | |
9418 | dwarf2_cu *m_cu; | |
9419 | }; | |
adde2bff | 9420 | |
c906108c SS |
9421 | /* Process a die and its children. */ |
9422 | ||
9423 | static void | |
e7c27a73 | 9424 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9425 | { |
4c8aa72d | 9426 | process_die_scope scope (die, cu); |
adde2bff | 9427 | |
c906108c SS |
9428 | switch (die->tag) |
9429 | { | |
9430 | case DW_TAG_padding: | |
9431 | break; | |
9432 | case DW_TAG_compile_unit: | |
95554aad | 9433 | case DW_TAG_partial_unit: |
e7c27a73 | 9434 | read_file_scope (die, cu); |
c906108c | 9435 | break; |
348e048f DE |
9436 | case DW_TAG_type_unit: |
9437 | read_type_unit_scope (die, cu); | |
9438 | break; | |
c906108c | 9439 | case DW_TAG_subprogram: |
c906108c | 9440 | case DW_TAG_inlined_subroutine: |
edb3359d | 9441 | read_func_scope (die, cu); |
c906108c SS |
9442 | break; |
9443 | case DW_TAG_lexical_block: | |
14898363 L |
9444 | case DW_TAG_try_block: |
9445 | case DW_TAG_catch_block: | |
e7c27a73 | 9446 | read_lexical_block_scope (die, cu); |
c906108c | 9447 | break; |
216f72a1 | 9448 | case DW_TAG_call_site: |
96408a79 SA |
9449 | case DW_TAG_GNU_call_site: |
9450 | read_call_site_scope (die, cu); | |
9451 | break; | |
c906108c | 9452 | case DW_TAG_class_type: |
680b30c7 | 9453 | case DW_TAG_interface_type: |
c906108c SS |
9454 | case DW_TAG_structure_type: |
9455 | case DW_TAG_union_type: | |
134d01f1 | 9456 | process_structure_scope (die, cu); |
c906108c SS |
9457 | break; |
9458 | case DW_TAG_enumeration_type: | |
134d01f1 | 9459 | process_enumeration_scope (die, cu); |
c906108c | 9460 | break; |
134d01f1 | 9461 | |
f792889a DJ |
9462 | /* These dies have a type, but processing them does not create |
9463 | a symbol or recurse to process the children. Therefore we can | |
9464 | read them on-demand through read_type_die. */ | |
c906108c | 9465 | case DW_TAG_subroutine_type: |
72019c9c | 9466 | case DW_TAG_set_type: |
c906108c | 9467 | case DW_TAG_array_type: |
c906108c | 9468 | case DW_TAG_pointer_type: |
c906108c | 9469 | case DW_TAG_ptr_to_member_type: |
c906108c | 9470 | case DW_TAG_reference_type: |
4297a3f0 | 9471 | case DW_TAG_rvalue_reference_type: |
c906108c | 9472 | case DW_TAG_string_type: |
c906108c | 9473 | break; |
134d01f1 | 9474 | |
c906108c | 9475 | case DW_TAG_base_type: |
a02abb62 | 9476 | case DW_TAG_subrange_type: |
cb249c71 | 9477 | case DW_TAG_typedef: |
134d01f1 DJ |
9478 | /* Add a typedef symbol for the type definition, if it has a |
9479 | DW_AT_name. */ | |
f792889a | 9480 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9481 | break; |
c906108c | 9482 | case DW_TAG_common_block: |
e7c27a73 | 9483 | read_common_block (die, cu); |
c906108c SS |
9484 | break; |
9485 | case DW_TAG_common_inclusion: | |
9486 | break; | |
d9fa45fe | 9487 | case DW_TAG_namespace: |
4d4ec4e5 | 9488 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 9489 | read_namespace (die, cu); |
d9fa45fe | 9490 | break; |
5d7cb8df | 9491 | case DW_TAG_module: |
4d4ec4e5 | 9492 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
9493 | read_module (die, cu); |
9494 | break; | |
d9fa45fe | 9495 | case DW_TAG_imported_declaration: |
74921315 KS |
9496 | cu->processing_has_namespace_info = 1; |
9497 | if (read_namespace_alias (die, cu)) | |
9498 | break; | |
9499 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 9500 | case DW_TAG_imported_module: |
4d4ec4e5 | 9501 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
9502 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9503 | || cu->language != language_fortran)) | |
9504 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
9505 | dwarf_tag_name (die->tag)); | |
9506 | read_import_statement (die, cu); | |
d9fa45fe | 9507 | break; |
95554aad TT |
9508 | |
9509 | case DW_TAG_imported_unit: | |
9510 | process_imported_unit_die (die, cu); | |
9511 | break; | |
9512 | ||
71a3c369 TT |
9513 | case DW_TAG_variable: |
9514 | read_variable (die, cu); | |
9515 | break; | |
9516 | ||
c906108c | 9517 | default: |
e7c27a73 | 9518 | new_symbol (die, NULL, cu); |
c906108c SS |
9519 | break; |
9520 | } | |
9521 | } | |
ca69b9e6 DE |
9522 | \f |
9523 | /* DWARF name computation. */ | |
c906108c | 9524 | |
94af9270 KS |
9525 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9526 | needs to have the name of the scope prepended to the name listed in the | |
9527 | die. */ | |
9528 | ||
9529 | static int | |
9530 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9531 | { | |
1c809c68 TT |
9532 | struct attribute *attr; |
9533 | ||
94af9270 KS |
9534 | switch (die->tag) |
9535 | { | |
9536 | case DW_TAG_namespace: | |
9537 | case DW_TAG_typedef: | |
9538 | case DW_TAG_class_type: | |
9539 | case DW_TAG_interface_type: | |
9540 | case DW_TAG_structure_type: | |
9541 | case DW_TAG_union_type: | |
9542 | case DW_TAG_enumeration_type: | |
9543 | case DW_TAG_enumerator: | |
9544 | case DW_TAG_subprogram: | |
08a76f8a | 9545 | case DW_TAG_inlined_subroutine: |
94af9270 | 9546 | case DW_TAG_member: |
74921315 | 9547 | case DW_TAG_imported_declaration: |
94af9270 KS |
9548 | return 1; |
9549 | ||
9550 | case DW_TAG_variable: | |
c2b0a229 | 9551 | case DW_TAG_constant: |
94af9270 KS |
9552 | /* We only need to prefix "globally" visible variables. These include |
9553 | any variable marked with DW_AT_external or any variable that | |
9554 | lives in a namespace. [Variables in anonymous namespaces | |
9555 | require prefixing, but they are not DW_AT_external.] */ | |
9556 | ||
9557 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9558 | { | |
9559 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9560 | |
94af9270 KS |
9561 | return die_needs_namespace (die_specification (die, &spec_cu), |
9562 | spec_cu); | |
9563 | } | |
9564 | ||
1c809c68 | 9565 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9566 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9567 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9568 | return 0; |
9569 | /* A variable in a lexical block of some kind does not need a | |
9570 | namespace, even though in C++ such variables may be external | |
9571 | and have a mangled name. */ | |
9572 | if (die->parent->tag == DW_TAG_lexical_block | |
9573 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9574 | || die->parent->tag == DW_TAG_catch_block |
9575 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9576 | return 0; |
9577 | return 1; | |
94af9270 KS |
9578 | |
9579 | default: | |
9580 | return 0; | |
9581 | } | |
9582 | } | |
9583 | ||
73b9be8b KS |
9584 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9585 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9586 | defined for the given DIE. */ | |
9587 | ||
9588 | static struct attribute * | |
9589 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9590 | { | |
9591 | struct attribute *attr; | |
9592 | ||
9593 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9594 | if (attr == NULL) | |
9595 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9596 | ||
9597 | return attr; | |
9598 | } | |
9599 | ||
9600 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9601 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9602 | defined for the given DIE. */ | |
9603 | ||
9604 | static const char * | |
9605 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9606 | { | |
9607 | const char *linkage_name; | |
9608 | ||
9609 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9610 | if (linkage_name == NULL) | |
9611 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9612 | ||
9613 | return linkage_name; | |
9614 | } | |
9615 | ||
94af9270 | 9616 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9617 | compute the physname for the object, which include a method's: |
9c37b5ae | 9618 | - formal parameters (C++), |
a766d390 | 9619 | - receiver type (Go), |
a766d390 DE |
9620 | |
9621 | The term "physname" is a bit confusing. | |
9622 | For C++, for example, it is the demangled name. | |
9623 | For Go, for example, it's the mangled name. | |
94af9270 | 9624 | |
af6b7be1 JB |
9625 | For Ada, return the DIE's linkage name rather than the fully qualified |
9626 | name. PHYSNAME is ignored.. | |
9627 | ||
94af9270 KS |
9628 | The result is allocated on the objfile_obstack and canonicalized. */ |
9629 | ||
9630 | static const char * | |
15d034d0 TT |
9631 | dwarf2_compute_name (const char *name, |
9632 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9633 | int physname) |
9634 | { | |
bb5ed363 DE |
9635 | struct objfile *objfile = cu->objfile; |
9636 | ||
94af9270 KS |
9637 | if (name == NULL) |
9638 | name = dwarf2_name (die, cu); | |
9639 | ||
2ee7123e DE |
9640 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
9641 | but otherwise compute it by typename_concat inside GDB. | |
9642 | FIXME: Actually this is not really true, or at least not always true. | |
9643 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
9644 | Fortran names because there is no mangling standard. So new_symbol_full | |
9645 | will set the demangled name to the result of dwarf2_full_name, and it is | |
9646 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
9647 | if (cu->language == language_ada |
9648 | || (cu->language == language_fortran && physname)) | |
9649 | { | |
9650 | /* For Ada unit, we prefer the linkage name over the name, as | |
9651 | the former contains the exported name, which the user expects | |
9652 | to be able to reference. Ideally, we want the user to be able | |
9653 | to reference this entity using either natural or linkage name, | |
9654 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 9655 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 9656 | |
2ee7123e DE |
9657 | if (linkage_name != NULL) |
9658 | return linkage_name; | |
f55ee35c JK |
9659 | } |
9660 | ||
94af9270 KS |
9661 | /* These are the only languages we know how to qualify names in. */ |
9662 | if (name != NULL | |
9c37b5ae | 9663 | && (cu->language == language_cplus |
c44af4eb TT |
9664 | || cu->language == language_fortran || cu->language == language_d |
9665 | || cu->language == language_rust)) | |
94af9270 KS |
9666 | { |
9667 | if (die_needs_namespace (die, cu)) | |
9668 | { | |
9669 | long length; | |
0d5cff50 | 9670 | const char *prefix; |
34a68019 | 9671 | const char *canonical_name = NULL; |
94af9270 | 9672 | |
d7e74731 PA |
9673 | string_file buf; |
9674 | ||
94af9270 | 9675 | prefix = determine_prefix (die, cu); |
94af9270 KS |
9676 | if (*prefix != '\0') |
9677 | { | |
f55ee35c JK |
9678 | char *prefixed_name = typename_concat (NULL, prefix, name, |
9679 | physname, cu); | |
9a619af0 | 9680 | |
d7e74731 | 9681 | buf.puts (prefixed_name); |
94af9270 KS |
9682 | xfree (prefixed_name); |
9683 | } | |
9684 | else | |
d7e74731 | 9685 | buf.puts (name); |
94af9270 | 9686 | |
98bfdba5 PA |
9687 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
9688 | as children with DW_TAG_template_type_param or | |
9689 | DW_TAG_value_type_param. If the latter, add them to the name | |
9690 | here. If the name already has template parameters, then | |
9691 | skip this step; some versions of GCC emit both, and | |
9692 | it is more efficient to use the pre-computed name. | |
9693 | ||
9694 | Something to keep in mind about this process: it is very | |
9695 | unlikely, or in some cases downright impossible, to produce | |
9696 | something that will match the mangled name of a function. | |
9697 | If the definition of the function has the same debug info, | |
9698 | we should be able to match up with it anyway. But fallbacks | |
9699 | using the minimal symbol, for instance to find a method | |
9700 | implemented in a stripped copy of libstdc++, will not work. | |
9701 | If we do not have debug info for the definition, we will have to | |
9702 | match them up some other way. | |
9703 | ||
9704 | When we do name matching there is a related problem with function | |
9705 | templates; two instantiated function templates are allowed to | |
9706 | differ only by their return types, which we do not add here. */ | |
9707 | ||
9708 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
9709 | { | |
9710 | struct attribute *attr; | |
9711 | struct die_info *child; | |
9712 | int first = 1; | |
9713 | ||
9714 | die->building_fullname = 1; | |
9715 | ||
9716 | for (child = die->child; child != NULL; child = child->sibling) | |
9717 | { | |
9718 | struct type *type; | |
12df843f | 9719 | LONGEST value; |
d521ce57 | 9720 | const gdb_byte *bytes; |
98bfdba5 PA |
9721 | struct dwarf2_locexpr_baton *baton; |
9722 | struct value *v; | |
9723 | ||
9724 | if (child->tag != DW_TAG_template_type_param | |
9725 | && child->tag != DW_TAG_template_value_param) | |
9726 | continue; | |
9727 | ||
9728 | if (first) | |
9729 | { | |
d7e74731 | 9730 | buf.puts ("<"); |
98bfdba5 PA |
9731 | first = 0; |
9732 | } | |
9733 | else | |
d7e74731 | 9734 | buf.puts (", "); |
98bfdba5 PA |
9735 | |
9736 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
9737 | if (attr == NULL) | |
9738 | { | |
9739 | complaint (&symfile_complaints, | |
9740 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 9741 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
9742 | continue; |
9743 | } | |
9744 | type = die_type (child, cu); | |
9745 | ||
9746 | if (child->tag == DW_TAG_template_type_param) | |
9747 | { | |
d7e74731 | 9748 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
9749 | continue; |
9750 | } | |
9751 | ||
9752 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
9753 | if (attr == NULL) | |
9754 | { | |
9755 | complaint (&symfile_complaints, | |
3e43a32a MS |
9756 | _("template parameter missing " |
9757 | "DW_AT_const_value")); | |
d7e74731 | 9758 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
9759 | continue; |
9760 | } | |
9761 | ||
9762 | dwarf2_const_value_attr (attr, type, name, | |
9763 | &cu->comp_unit_obstack, cu, | |
9764 | &value, &bytes, &baton); | |
9765 | ||
9766 | if (TYPE_NOSIGN (type)) | |
9767 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
9768 | changed, this can use value_print instead. */ | |
d7e74731 | 9769 | c_printchar (value, type, &buf); |
98bfdba5 PA |
9770 | else |
9771 | { | |
9772 | struct value_print_options opts; | |
9773 | ||
9774 | if (baton != NULL) | |
9775 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
9776 | baton->data, | |
9777 | baton->size, | |
9778 | baton->per_cu); | |
9779 | else if (bytes != NULL) | |
9780 | { | |
9781 | v = allocate_value (type); | |
9782 | memcpy (value_contents_writeable (v), bytes, | |
9783 | TYPE_LENGTH (type)); | |
9784 | } | |
9785 | else | |
9786 | v = value_from_longest (type, value); | |
9787 | ||
3e43a32a MS |
9788 | /* Specify decimal so that we do not depend on |
9789 | the radix. */ | |
98bfdba5 PA |
9790 | get_formatted_print_options (&opts, 'd'); |
9791 | opts.raw = 1; | |
d7e74731 | 9792 | value_print (v, &buf, &opts); |
98bfdba5 PA |
9793 | release_value (v); |
9794 | value_free (v); | |
9795 | } | |
9796 | } | |
9797 | ||
9798 | die->building_fullname = 0; | |
9799 | ||
9800 | if (!first) | |
9801 | { | |
9802 | /* Close the argument list, with a space if necessary | |
9803 | (nested templates). */ | |
d7e74731 PA |
9804 | if (!buf.empty () && buf.string ().back () == '>') |
9805 | buf.puts (" >"); | |
98bfdba5 | 9806 | else |
d7e74731 | 9807 | buf.puts (">"); |
98bfdba5 PA |
9808 | } |
9809 | } | |
9810 | ||
9c37b5ae | 9811 | /* For C++ methods, append formal parameter type |
94af9270 | 9812 | information, if PHYSNAME. */ |
6e70227d | 9813 | |
94af9270 | 9814 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 9815 | && cu->language == language_cplus) |
94af9270 KS |
9816 | { |
9817 | struct type *type = read_type_die (die, cu); | |
9818 | ||
d7e74731 | 9819 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 9820 | &type_print_raw_options); |
94af9270 | 9821 | |
9c37b5ae | 9822 | if (cu->language == language_cplus) |
94af9270 | 9823 | { |
60430eff DJ |
9824 | /* Assume that an artificial first parameter is |
9825 | "this", but do not crash if it is not. RealView | |
9826 | marks unnamed (and thus unused) parameters as | |
9827 | artificial; there is no way to differentiate | |
9828 | the two cases. */ | |
94af9270 KS |
9829 | if (TYPE_NFIELDS (type) > 0 |
9830 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 9831 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
9832 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
9833 | 0)))) | |
d7e74731 | 9834 | buf.puts (" const"); |
94af9270 KS |
9835 | } |
9836 | } | |
9837 | ||
d7e74731 | 9838 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
9839 | |
9840 | if (cu->language == language_cplus) | |
34a68019 | 9841 | canonical_name |
322a8516 | 9842 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
9843 | &objfile->per_bfd->storage_obstack); |
9844 | ||
9845 | /* If we only computed INTERMEDIATE_NAME, or if | |
9846 | INTERMEDIATE_NAME is already canonical, then we need to | |
9847 | copy it to the appropriate obstack. */ | |
322a8516 | 9848 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
9849 | name = ((const char *) |
9850 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
9851 | intermediate_name.c_str (), |
9852 | intermediate_name.length ())); | |
34a68019 TT |
9853 | else |
9854 | name = canonical_name; | |
94af9270 KS |
9855 | } |
9856 | } | |
9857 | ||
9858 | return name; | |
9859 | } | |
9860 | ||
0114d602 DJ |
9861 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9862 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9863 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9864 | not have a name. NAME may either be from a previous call to |
9865 | dwarf2_name or NULL. | |
9866 | ||
9c37b5ae | 9867 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9868 | |
9869 | static const char * | |
15d034d0 | 9870 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 9871 | { |
94af9270 KS |
9872 | return dwarf2_compute_name (name, die, cu, 0); |
9873 | } | |
0114d602 | 9874 | |
94af9270 KS |
9875 | /* Construct a physname for the given DIE in CU. NAME may either be |
9876 | from a previous call to dwarf2_name or NULL. The result will be | |
9877 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9878 | name. | |
0114d602 | 9879 | |
9c37b5ae | 9880 | The output string will be canonicalized (if C++). */ |
0114d602 | 9881 | |
94af9270 | 9882 | static const char * |
15d034d0 | 9883 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9884 | { |
bb5ed363 | 9885 | struct objfile *objfile = cu->objfile; |
900e11f9 | 9886 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
9887 | int need_copy = 1; |
9888 | ||
9889 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9890 | on its own. */ | |
9891 | if (!die_needs_namespace (die, cu)) | |
9892 | return dwarf2_compute_name (name, die, cu, 1); | |
9893 | ||
73b9be8b | 9894 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9895 | |
e98c9e7c TT |
9896 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9897 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9898 | if (cu->language == language_rust && mangled != NULL | |
9899 | && strchr (mangled, '{') != NULL) | |
9900 | mangled = NULL; | |
9901 | ||
900e11f9 JK |
9902 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9903 | has computed. */ | |
791afaa2 | 9904 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 9905 | if (mangled != NULL) |
900e11f9 | 9906 | { |
900e11f9 JK |
9907 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9908 | type. It is easier for GDB users to search for such functions as | |
9909 | `name(params)' than `long name(params)'. In such case the minimal | |
9910 | symbol names do not match the full symbol names but for template | |
9911 | functions there is never a need to look up their definition from their | |
9912 | declaration so the only disadvantage remains the minimal symbol | |
9913 | variant `long name(params)' does not have the proper inferior type. | |
9914 | */ | |
9915 | ||
a766d390 DE |
9916 | if (cu->language == language_go) |
9917 | { | |
9918 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9919 | new_symbol_full assumes we return the mangled name. | |
9920 | This just undoes that lie until things are cleaned up. */ | |
a766d390 DE |
9921 | } |
9922 | else | |
9923 | { | |
791afaa2 TT |
9924 | demangled.reset (gdb_demangle (mangled, |
9925 | (DMGL_PARAMS | DMGL_ANSI | |
9926 | | DMGL_RET_DROP))); | |
a766d390 | 9927 | } |
900e11f9 | 9928 | if (demangled) |
791afaa2 | 9929 | canon = demangled.get (); |
900e11f9 JK |
9930 | else |
9931 | { | |
9932 | canon = mangled; | |
9933 | need_copy = 0; | |
9934 | } | |
9935 | } | |
9936 | ||
9937 | if (canon == NULL || check_physname) | |
9938 | { | |
9939 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9940 | ||
9941 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9942 | { | |
9943 | /* It may not mean a bug in GDB. The compiler could also | |
9944 | compute DW_AT_linkage_name incorrectly. But in such case | |
9945 | GDB would need to be bug-to-bug compatible. */ | |
9946 | ||
9947 | complaint (&symfile_complaints, | |
9948 | _("Computed physname <%s> does not match demangled <%s> " | |
9949 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9950 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9951 | objfile_name (objfile)); |
900e11f9 JK |
9952 | |
9953 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9954 | is available here - over computed PHYSNAME. It is safer | |
9955 | against both buggy GDB and buggy compilers. */ | |
9956 | ||
9957 | retval = canon; | |
9958 | } | |
9959 | else | |
9960 | { | |
9961 | retval = physname; | |
9962 | need_copy = 0; | |
9963 | } | |
9964 | } | |
9965 | else | |
9966 | retval = canon; | |
9967 | ||
9968 | if (need_copy) | |
224c3ddb SM |
9969 | retval = ((const char *) |
9970 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9971 | retval, strlen (retval))); | |
900e11f9 | 9972 | |
900e11f9 | 9973 | return retval; |
0114d602 DJ |
9974 | } |
9975 | ||
74921315 KS |
9976 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9977 | a new symbol for it. | |
9978 | ||
9979 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9980 | ||
9981 | static int | |
9982 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9983 | { | |
9984 | struct attribute *attr; | |
9985 | ||
9986 | /* If the die does not have a name, this is not a namespace | |
9987 | alias. */ | |
9988 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9989 | if (attr != NULL) | |
9990 | { | |
9991 | int num; | |
9992 | struct die_info *d = die; | |
9993 | struct dwarf2_cu *imported_cu = cu; | |
9994 | ||
9995 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9996 | keep inspecting DIEs until we hit the underlying import. */ | |
9997 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9998 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9999 | { | |
10000 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
10001 | if (attr == NULL) | |
10002 | break; | |
10003 | ||
10004 | d = follow_die_ref (d, attr, &imported_cu); | |
10005 | if (d->tag != DW_TAG_imported_declaration) | |
10006 | break; | |
10007 | } | |
10008 | ||
10009 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10010 | { | |
10011 | complaint (&symfile_complaints, | |
10012 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 10013 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
10014 | return 0; |
10015 | } | |
10016 | ||
10017 | if (attr != NULL) | |
10018 | { | |
10019 | struct type *type; | |
9c541725 | 10020 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 10021 | |
9c541725 | 10022 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
10023 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
10024 | { | |
10025 | /* This declaration is a global namespace alias. Add | |
10026 | a symbol for it whose type is the aliased namespace. */ | |
10027 | new_symbol (die, type, cu); | |
10028 | return 1; | |
10029 | } | |
10030 | } | |
10031 | } | |
10032 | ||
10033 | return 0; | |
10034 | } | |
10035 | ||
22cee43f PMR |
10036 | /* Return the using directives repository (global or local?) to use in the |
10037 | current context for LANGUAGE. | |
10038 | ||
10039 | For Ada, imported declarations can materialize renamings, which *may* be | |
10040 | global. However it is impossible (for now?) in DWARF to distinguish | |
10041 | "external" imported declarations and "static" ones. As all imported | |
10042 | declarations seem to be static in all other languages, make them all CU-wide | |
10043 | global only in Ada. */ | |
10044 | ||
10045 | static struct using_direct ** | |
10046 | using_directives (enum language language) | |
10047 | { | |
10048 | if (language == language_ada && context_stack_depth == 0) | |
10049 | return &global_using_directives; | |
10050 | else | |
10051 | return &local_using_directives; | |
10052 | } | |
10053 | ||
27aa8d6a SW |
10054 | /* Read the import statement specified by the given die and record it. */ |
10055 | ||
10056 | static void | |
10057 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10058 | { | |
bb5ed363 | 10059 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 10060 | struct attribute *import_attr; |
32019081 | 10061 | struct die_info *imported_die, *child_die; |
de4affc9 | 10062 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10063 | const char *imported_name; |
794684b6 | 10064 | const char *imported_name_prefix; |
13387711 SW |
10065 | const char *canonical_name; |
10066 | const char *import_alias; | |
10067 | const char *imported_declaration = NULL; | |
794684b6 | 10068 | const char *import_prefix; |
eb1e02fd | 10069 | std::vector<const char *> excludes; |
13387711 | 10070 | |
27aa8d6a SW |
10071 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10072 | if (import_attr == NULL) | |
10073 | { | |
10074 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
10075 | dwarf_tag_name (die->tag)); | |
10076 | return; | |
10077 | } | |
10078 | ||
de4affc9 CC |
10079 | imported_cu = cu; |
10080 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10081 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10082 | if (imported_name == NULL) |
10083 | { | |
10084 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10085 | ||
10086 | The import in the following code: | |
10087 | namespace A | |
10088 | { | |
10089 | typedef int B; | |
10090 | } | |
10091 | ||
10092 | int main () | |
10093 | { | |
10094 | using A::B; | |
10095 | B b; | |
10096 | return b; | |
10097 | } | |
10098 | ||
10099 | ... | |
10100 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10101 | <52> DW_AT_decl_file : 1 | |
10102 | <53> DW_AT_decl_line : 6 | |
10103 | <54> DW_AT_import : <0x75> | |
10104 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10105 | <59> DW_AT_name : B | |
10106 | <5b> DW_AT_decl_file : 1 | |
10107 | <5c> DW_AT_decl_line : 2 | |
10108 | <5d> DW_AT_type : <0x6e> | |
10109 | ... | |
10110 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10111 | <76> DW_AT_byte_size : 4 | |
10112 | <77> DW_AT_encoding : 5 (signed) | |
10113 | ||
10114 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10115 | This case will be ignored until the gcc bug is fixed. */ | |
10116 | return; | |
10117 | } | |
10118 | ||
82856980 SW |
10119 | /* Figure out the local name after import. */ |
10120 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10121 | |
794684b6 SW |
10122 | /* Figure out where the statement is being imported to. */ |
10123 | import_prefix = determine_prefix (die, cu); | |
10124 | ||
10125 | /* Figure out what the scope of the imported die is and prepend it | |
10126 | to the name of the imported die. */ | |
de4affc9 | 10127 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10128 | |
f55ee35c JK |
10129 | if (imported_die->tag != DW_TAG_namespace |
10130 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10131 | { |
13387711 SW |
10132 | imported_declaration = imported_name; |
10133 | canonical_name = imported_name_prefix; | |
794684b6 | 10134 | } |
13387711 | 10135 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10136 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10137 | imported_name_prefix, |
10138 | (cu->language == language_d ? "." : "::"), | |
10139 | imported_name, (char *) NULL); | |
13387711 SW |
10140 | else |
10141 | canonical_name = imported_name; | |
794684b6 | 10142 | |
32019081 JK |
10143 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10144 | for (child_die = die->child; child_die && child_die->tag; | |
10145 | child_die = sibling_die (child_die)) | |
10146 | { | |
10147 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10148 | represented by an imported module entry with an import attribute | |
10149 | referring to the module and owned entries corresponding to those | |
10150 | entities that are renamed as part of being imported. */ | |
10151 | ||
10152 | if (child_die->tag != DW_TAG_imported_declaration) | |
10153 | { | |
10154 | complaint (&symfile_complaints, | |
10155 | _("child DW_TAG_imported_declaration expected " | |
10156 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 10157 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
10158 | continue; |
10159 | } | |
10160 | ||
10161 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10162 | if (import_attr == NULL) | |
10163 | { | |
10164 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
10165 | dwarf_tag_name (child_die->tag)); | |
10166 | continue; | |
10167 | } | |
10168 | ||
10169 | imported_cu = cu; | |
10170 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10171 | &imported_cu); | |
10172 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10173 | if (imported_name == NULL) | |
10174 | { | |
10175 | complaint (&symfile_complaints, | |
10176 | _("child DW_TAG_imported_declaration has unknown " | |
10177 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 10178 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
10179 | continue; |
10180 | } | |
10181 | ||
eb1e02fd | 10182 | excludes.push_back (imported_name); |
32019081 JK |
10183 | |
10184 | process_die (child_die, cu); | |
10185 | } | |
10186 | ||
22cee43f PMR |
10187 | add_using_directive (using_directives (cu->language), |
10188 | import_prefix, | |
10189 | canonical_name, | |
10190 | import_alias, | |
10191 | imported_declaration, | |
10192 | excludes, | |
10193 | 0, | |
10194 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10195 | } |
10196 | ||
5230b05a WT |
10197 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10198 | types, but gives them a size of zero. Starting with version 14, | |
10199 | ICC is compatible with GCC. */ | |
10200 | ||
10201 | static int | |
10202 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
10203 | { | |
10204 | if (!cu->checked_producer) | |
10205 | check_producer (cu); | |
10206 | ||
10207 | return cu->producer_is_icc_lt_14; | |
10208 | } | |
10209 | ||
1b80a9fa JK |
10210 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10211 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10212 | this, it was first present in GCC release 4.3.0. */ | |
10213 | ||
10214 | static int | |
10215 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
10216 | { | |
10217 | if (!cu->checked_producer) | |
10218 | check_producer (cu); | |
10219 | ||
10220 | return cu->producer_is_gcc_lt_4_3; | |
10221 | } | |
10222 | ||
d721ba37 PA |
10223 | static file_and_directory |
10224 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10225 | { |
d721ba37 PA |
10226 | file_and_directory res; |
10227 | ||
9291a0cd TT |
10228 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10229 | is not a source language identifier. */ | |
d721ba37 PA |
10230 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10231 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10232 | |
d721ba37 PA |
10233 | if (res.comp_dir == NULL |
10234 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10235 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10236 | { |
d721ba37 PA |
10237 | res.comp_dir_storage = ldirname (res.name); |
10238 | if (!res.comp_dir_storage.empty ()) | |
10239 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10240 | } |
d721ba37 | 10241 | if (res.comp_dir != NULL) |
9291a0cd TT |
10242 | { |
10243 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10244 | directory, get rid of it. */ | |
d721ba37 | 10245 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10246 | |
d721ba37 PA |
10247 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10248 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10249 | } |
10250 | ||
d721ba37 PA |
10251 | if (res.name == NULL) |
10252 | res.name = "<unknown>"; | |
10253 | ||
10254 | return res; | |
9291a0cd TT |
10255 | } |
10256 | ||
f4dc4d17 DE |
10257 | /* Handle DW_AT_stmt_list for a compilation unit. |
10258 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10259 | COMP_DIR is the compilation directory. LOWPC is passed to |
10260 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10261 | |
10262 | static void | |
10263 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10264 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10265 | { |
527f3840 | 10266 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 10267 | struct attribute *attr; |
527f3840 JK |
10268 | struct line_header line_header_local; |
10269 | hashval_t line_header_local_hash; | |
10270 | unsigned u; | |
10271 | void **slot; | |
10272 | int decode_mapping; | |
2ab95328 | 10273 | |
f4dc4d17 DE |
10274 | gdb_assert (! cu->per_cu->is_debug_types); |
10275 | ||
2ab95328 | 10276 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
10277 | if (attr == NULL) |
10278 | return; | |
10279 | ||
9c541725 | 10280 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10281 | |
10282 | /* The line header hash table is only created if needed (it exists to | |
10283 | prevent redundant reading of the line table for partial_units). | |
10284 | If we're given a partial_unit, we'll need it. If we're given a | |
10285 | compile_unit, then use the line header hash table if it's already | |
10286 | created, but don't create one just yet. */ | |
10287 | ||
10288 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10289 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10290 | { |
527f3840 JK |
10291 | dwarf2_per_objfile->line_header_hash |
10292 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
10293 | line_header_eq_voidp, | |
10294 | free_line_header_voidp, | |
10295 | &objfile->objfile_obstack, | |
10296 | hashtab_obstack_allocate, | |
10297 | dummy_obstack_deallocate); | |
10298 | } | |
2ab95328 | 10299 | |
9c541725 | 10300 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10301 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10302 | line_header_local_hash = line_header_hash (&line_header_local); | |
10303 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10304 | { | |
10305 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10306 | &line_header_local, | |
10307 | line_header_local_hash, NO_INSERT); | |
10308 | ||
10309 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10310 | is not present in *SLOT (since if there is something in *SLOT then | |
10311 | it will be for a partial_unit). */ | |
10312 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10313 | { |
527f3840 | 10314 | gdb_assert (*slot != NULL); |
9a3c8263 | 10315 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10316 | return; |
dee91e82 | 10317 | } |
2ab95328 | 10318 | } |
527f3840 JK |
10319 | |
10320 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10321 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10322 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10323 | if (lh == NULL) | |
527f3840 | 10324 | return; |
4c8aa72d PA |
10325 | |
10326 | cu->line_header = lh.release (); | |
10327 | cu->line_header_die_owner = die; | |
527f3840 JK |
10328 | |
10329 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10330 | slot = NULL; | |
10331 | else | |
10332 | { | |
10333 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10334 | &line_header_local, | |
10335 | line_header_local_hash, INSERT); | |
10336 | gdb_assert (slot != NULL); | |
10337 | } | |
10338 | if (slot != NULL && *slot == NULL) | |
10339 | { | |
10340 | /* This newly decoded line number information unit will be owned | |
10341 | by line_header_hash hash table. */ | |
10342 | *slot = cu->line_header; | |
4c8aa72d | 10343 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10344 | } |
10345 | else | |
10346 | { | |
10347 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10348 | may be already used by multiple CUs. Create only temporary decoded | |
10349 | line_header for this CU - it may happen at most once for each line | |
10350 | number information unit. And if we're not using line_header_hash | |
10351 | then this is what we want as well. */ | |
10352 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10353 | } |
10354 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10355 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10356 | decode_mapping); | |
fff8551c | 10357 | |
2ab95328 TT |
10358 | } |
10359 | ||
95554aad | 10360 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10361 | |
c906108c | 10362 | static void |
e7c27a73 | 10363 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10364 | { |
dee91e82 | 10365 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10366 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10367 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10368 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10369 | struct attribute *attr; | |
c906108c | 10370 | struct die_info *child_die; |
e142c38c | 10371 | CORE_ADDR baseaddr; |
6e70227d | 10372 | |
e142c38c | 10373 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 10374 | |
fae299cd | 10375 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10376 | |
10377 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10378 | from finish_block. */ | |
2acceee2 | 10379 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10380 | lowpc = highpc; |
3e29f34a | 10381 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10382 | |
d721ba37 | 10383 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10384 | |
95554aad | 10385 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 10386 | |
f4b8a18d KW |
10387 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10388 | standardised yet. As a workaround for the language detection we fall | |
10389 | back to the DW_AT_producer string. */ | |
10390 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10391 | cu->language = language_opencl; | |
10392 | ||
3019eac3 DE |
10393 | /* Similar hack for Go. */ |
10394 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10395 | set_cu_language (DW_LANG_Go, cu); | |
10396 | ||
d721ba37 | 10397 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10398 | |
10399 | /* Decode line number information if present. We do this before | |
10400 | processing child DIEs, so that the line header table is available | |
10401 | for DW_AT_decl_file. */ | |
d721ba37 | 10402 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10403 | |
10404 | /* Process all dies in compilation unit. */ | |
10405 | if (die->child != NULL) | |
10406 | { | |
10407 | child_die = die->child; | |
10408 | while (child_die && child_die->tag) | |
10409 | { | |
10410 | process_die (child_die, cu); | |
10411 | child_die = sibling_die (child_die); | |
10412 | } | |
10413 | } | |
10414 | ||
10415 | /* Decode macro information, if present. Dwarf 2 macro information | |
10416 | refers to information in the line number info statement program | |
10417 | header, so we can only read it if we've read the header | |
10418 | successfully. */ | |
0af92d60 JK |
10419 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10420 | if (attr == NULL) | |
10421 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10422 | if (attr && cu->line_header) |
10423 | { | |
10424 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
10425 | complaint (&symfile_complaints, | |
0af92d60 | 10426 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10427 | |
43f3e411 | 10428 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10429 | } |
10430 | else | |
10431 | { | |
10432 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10433 | if (attr && cu->line_header) | |
10434 | { | |
10435 | unsigned int macro_offset = DW_UNSND (attr); | |
10436 | ||
43f3e411 | 10437 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10438 | } |
10439 | } | |
3019eac3 DE |
10440 | } |
10441 | ||
f4dc4d17 DE |
10442 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
10443 | Create the set of symtabs used by this TU, or if this TU is sharing | |
10444 | symtabs with another TU and the symtabs have already been created | |
10445 | then restore those symtabs in the line header. | |
10446 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
10447 | |
10448 | static void | |
f4dc4d17 | 10449 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 10450 | { |
f4dc4d17 DE |
10451 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
10452 | struct type_unit_group *tu_group; | |
10453 | int first_time; | |
3019eac3 | 10454 | struct attribute *attr; |
9c541725 | 10455 | unsigned int i; |
0186c6a7 | 10456 | struct signatured_type *sig_type; |
3019eac3 | 10457 | |
f4dc4d17 | 10458 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10459 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10460 | |
f4dc4d17 | 10461 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 10462 | |
f4dc4d17 | 10463 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10464 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
10465 | if (sig_type->type_unit_group == NULL) |
10466 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
10467 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
10468 | |
10469 | /* If we've already processed this stmt_list there's no real need to | |
10470 | do it again, we could fake it and just recreate the part we need | |
10471 | (file name,index -> symtab mapping). If data shows this optimization | |
10472 | is useful we can do it then. */ | |
43f3e411 | 10473 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10474 | |
10475 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10476 | debug info. */ | |
fff8551c | 10477 | line_header_up lh; |
f4dc4d17 | 10478 | if (attr != NULL) |
3019eac3 | 10479 | { |
9c541725 | 10480 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
10481 | lh = dwarf_decode_line_header (line_offset, cu); |
10482 | } | |
10483 | if (lh == NULL) | |
10484 | { | |
10485 | if (first_time) | |
10486 | dwarf2_start_symtab (cu, "", NULL, 0); | |
10487 | else | |
10488 | { | |
10489 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 10490 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10491 | } |
f4dc4d17 | 10492 | return; |
3019eac3 DE |
10493 | } |
10494 | ||
4c8aa72d PA |
10495 | cu->line_header = lh.release (); |
10496 | cu->line_header_die_owner = die; | |
3019eac3 | 10497 | |
f4dc4d17 DE |
10498 | if (first_time) |
10499 | { | |
43f3e411 | 10500 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 10501 | |
1fd60fc0 DE |
10502 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10503 | still initializing it, and our caller (a few levels up) | |
10504 | process_full_type_unit still needs to know if this is the first | |
10505 | time. */ | |
10506 | ||
4c8aa72d PA |
10507 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
10508 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
10509 | cu->line_header->file_names.size ()); | |
3019eac3 | 10510 | |
4c8aa72d | 10511 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10512 | { |
4c8aa72d | 10513 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 10514 | |
4c8aa72d | 10515 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 10516 | |
f4dc4d17 DE |
10517 | if (current_subfile->symtab == NULL) |
10518 | { | |
4c8aa72d PA |
10519 | /* NOTE: start_subfile will recognize when it's been |
10520 | passed a file it has already seen. So we can't | |
10521 | assume there's a simple mapping from | |
10522 | cu->line_header->file_names to subfiles, plus | |
10523 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
10524 | current_subfile->symtab |
10525 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
10526 | } |
10527 | ||
8c43009f PA |
10528 | fe.symtab = current_subfile->symtab; |
10529 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
10530 | } |
10531 | } | |
10532 | else | |
3019eac3 | 10533 | { |
0ab9ce85 | 10534 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10535 | |
4c8aa72d | 10536 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10537 | { |
4c8aa72d | 10538 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 10539 | |
4c8aa72d | 10540 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10541 | } |
3019eac3 DE |
10542 | } |
10543 | ||
f4dc4d17 DE |
10544 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10545 | so they don't have a "real" (so to speak) symtab anyway. | |
10546 | There is later code that will assign the main symtab to all symbols | |
10547 | that don't have one. We need to handle the case of a symbol with a | |
10548 | missing symtab (DW_AT_decl_file) anyway. */ | |
10549 | } | |
3019eac3 | 10550 | |
f4dc4d17 DE |
10551 | /* Process DW_TAG_type_unit. |
10552 | For TUs we want to skip the first top level sibling if it's not the | |
10553 | actual type being defined by this TU. In this case the first top | |
10554 | level sibling is there to provide context only. */ | |
3019eac3 | 10555 | |
f4dc4d17 DE |
10556 | static void |
10557 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10558 | { | |
10559 | struct die_info *child_die; | |
3019eac3 | 10560 | |
f4dc4d17 DE |
10561 | prepare_one_comp_unit (cu, die, language_minimal); |
10562 | ||
10563 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10564 | We do this before processing child DIEs, so that the line header table | |
10565 | is available for DW_AT_decl_file. */ | |
10566 | setup_type_unit_groups (die, cu); | |
10567 | ||
10568 | if (die->child != NULL) | |
10569 | { | |
10570 | child_die = die->child; | |
10571 | while (child_die && child_die->tag) | |
10572 | { | |
10573 | process_die (child_die, cu); | |
10574 | child_die = sibling_die (child_die); | |
10575 | } | |
10576 | } | |
3019eac3 DE |
10577 | } |
10578 | \f | |
80626a55 DE |
10579 | /* DWO/DWP files. |
10580 | ||
10581 | http://gcc.gnu.org/wiki/DebugFission | |
10582 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10583 | ||
10584 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10585 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10586 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10587 | |
10588 | static hashval_t | |
10589 | hash_dwo_file (const void *item) | |
10590 | { | |
9a3c8263 | 10591 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10592 | hashval_t hash; |
3019eac3 | 10593 | |
a2ce51a0 DE |
10594 | hash = htab_hash_string (dwo_file->dwo_name); |
10595 | if (dwo_file->comp_dir != NULL) | |
10596 | hash += htab_hash_string (dwo_file->comp_dir); | |
10597 | return hash; | |
3019eac3 DE |
10598 | } |
10599 | ||
10600 | static int | |
10601 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10602 | { | |
9a3c8263 SM |
10603 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10604 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10605 | |
a2ce51a0 DE |
10606 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10607 | return 0; | |
10608 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10609 | return lhs->comp_dir == rhs->comp_dir; | |
10610 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10611 | } |
10612 | ||
10613 | /* Allocate a hash table for DWO files. */ | |
10614 | ||
10615 | static htab_t | |
10616 | allocate_dwo_file_hash_table (void) | |
10617 | { | |
10618 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10619 | ||
10620 | return htab_create_alloc_ex (41, | |
10621 | hash_dwo_file, | |
10622 | eq_dwo_file, | |
10623 | NULL, | |
10624 | &objfile->objfile_obstack, | |
10625 | hashtab_obstack_allocate, | |
10626 | dummy_obstack_deallocate); | |
10627 | } | |
10628 | ||
80626a55 DE |
10629 | /* Lookup DWO file DWO_NAME. */ |
10630 | ||
10631 | static void ** | |
0ac5b59e | 10632 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
10633 | { |
10634 | struct dwo_file find_entry; | |
10635 | void **slot; | |
10636 | ||
10637 | if (dwarf2_per_objfile->dwo_files == NULL) | |
10638 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
10639 | ||
10640 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
10641 | find_entry.dwo_name = dwo_name; |
10642 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
10643 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
10644 | ||
10645 | return slot; | |
10646 | } | |
10647 | ||
3019eac3 DE |
10648 | static hashval_t |
10649 | hash_dwo_unit (const void *item) | |
10650 | { | |
9a3c8263 | 10651 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
10652 | |
10653 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
10654 | return dwo_unit->signature; | |
10655 | } | |
10656 | ||
10657 | static int | |
10658 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
10659 | { | |
9a3c8263 SM |
10660 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
10661 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
10662 | |
10663 | /* The signature is assumed to be unique within the DWO file. | |
10664 | So while object file CU dwo_id's always have the value zero, | |
10665 | that's OK, assuming each object file DWO file has only one CU, | |
10666 | and that's the rule for now. */ | |
10667 | return lhs->signature == rhs->signature; | |
10668 | } | |
10669 | ||
10670 | /* Allocate a hash table for DWO CUs,TUs. | |
10671 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
10672 | ||
10673 | static htab_t | |
10674 | allocate_dwo_unit_table (struct objfile *objfile) | |
10675 | { | |
10676 | /* Start out with a pretty small number. | |
10677 | Generally DWO files contain only one CU and maybe some TUs. */ | |
10678 | return htab_create_alloc_ex (3, | |
10679 | hash_dwo_unit, | |
10680 | eq_dwo_unit, | |
10681 | NULL, | |
10682 | &objfile->objfile_obstack, | |
10683 | hashtab_obstack_allocate, | |
10684 | dummy_obstack_deallocate); | |
10685 | } | |
10686 | ||
80626a55 | 10687 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 10688 | |
19c3d4c9 | 10689 | struct create_dwo_cu_data |
3019eac3 DE |
10690 | { |
10691 | struct dwo_file *dwo_file; | |
19c3d4c9 | 10692 | struct dwo_unit dwo_unit; |
3019eac3 DE |
10693 | }; |
10694 | ||
19c3d4c9 | 10695 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
10696 | |
10697 | static void | |
19c3d4c9 DE |
10698 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
10699 | const gdb_byte *info_ptr, | |
10700 | struct die_info *comp_unit_die, | |
10701 | int has_children, | |
10702 | void *datap) | |
3019eac3 DE |
10703 | { |
10704 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 10705 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 10706 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 10707 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 10708 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 10709 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 10710 | struct attribute *attr; |
3019eac3 DE |
10711 | |
10712 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
10713 | if (attr == NULL) | |
10714 | { | |
19c3d4c9 DE |
10715 | complaint (&symfile_complaints, |
10716 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
10717 | " its dwo_id [in module %s]"), | |
9c541725 | 10718 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
10719 | return; |
10720 | } | |
10721 | ||
3019eac3 DE |
10722 | dwo_unit->dwo_file = dwo_file; |
10723 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 10724 | dwo_unit->section = section; |
9c541725 | 10725 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
10726 | dwo_unit->length = cu->per_cu->length; |
10727 | ||
b4f54984 | 10728 | if (dwarf_read_debug) |
4031ecc5 | 10729 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
10730 | to_underlying (sect_off), |
10731 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
10732 | } |
10733 | ||
33c5cd75 | 10734 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 10735 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 10736 | |
33c5cd75 DB |
10737 | static void |
10738 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
10739 | htab_t &cus_htab) | |
3019eac3 DE |
10740 | { |
10741 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
33c5cd75 | 10742 | const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev; |
d521ce57 | 10743 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 10744 | |
33c5cd75 DB |
10745 | dwarf2_read_section (objfile, §ion); |
10746 | info_ptr = section.buffer; | |
3019eac3 DE |
10747 | |
10748 | if (info_ptr == NULL) | |
33c5cd75 | 10749 | return; |
3019eac3 | 10750 | |
b4f54984 | 10751 | if (dwarf_read_debug) |
19c3d4c9 DE |
10752 | { |
10753 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
10754 | get_section_name (§ion), |
10755 | get_section_file_name (§ion)); | |
19c3d4c9 | 10756 | } |
3019eac3 | 10757 | |
33c5cd75 | 10758 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
10759 | while (info_ptr < end_ptr) |
10760 | { | |
10761 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
10762 | struct create_dwo_cu_data create_dwo_cu_data; |
10763 | struct dwo_unit *dwo_unit; | |
10764 | void **slot; | |
10765 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 10766 | |
19c3d4c9 DE |
10767 | memset (&create_dwo_cu_data.dwo_unit, 0, |
10768 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
10769 | memset (&per_cu, 0, sizeof (per_cu)); |
10770 | per_cu.objfile = objfile; | |
10771 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
10772 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
10773 | per_cu.section = §ion; | |
c5ed0576 | 10774 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
10775 | |
10776 | init_cutu_and_read_dies_no_follow ( | |
10777 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
10778 | info_ptr += per_cu.length; | |
10779 | ||
10780 | // If the unit could not be parsed, skip it. | |
10781 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
10782 | continue; | |
3019eac3 | 10783 | |
33c5cd75 DB |
10784 | if (cus_htab == NULL) |
10785 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 10786 | |
33c5cd75 DB |
10787 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
10788 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
10789 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
10790 | gdb_assert (slot != NULL); | |
10791 | if (*slot != NULL) | |
19c3d4c9 | 10792 | { |
33c5cd75 DB |
10793 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
10794 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 10795 | |
33c5cd75 DB |
10796 | complaint (&symfile_complaints, |
10797 | _("debug cu entry at offset 0x%x is duplicate to" | |
10798 | " the entry at offset 0x%x, signature %s"), | |
10799 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
10800 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 10801 | } |
33c5cd75 | 10802 | *slot = (void *)dwo_unit; |
3019eac3 | 10803 | } |
3019eac3 DE |
10804 | } |
10805 | ||
80626a55 DE |
10806 | /* DWP file .debug_{cu,tu}_index section format: |
10807 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
10808 | ||
d2415c6c DE |
10809 | DWP Version 1: |
10810 | ||
80626a55 DE |
10811 | Both index sections have the same format, and serve to map a 64-bit |
10812 | signature to a set of section numbers. Each section begins with a header, | |
10813 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
10814 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
10815 | aligned at 8-byte boundaries in the file. | |
10816 | ||
d2415c6c DE |
10817 | The index section header consists of: |
10818 | ||
10819 | V, 32 bit version number | |
10820 | -, 32 bits unused | |
10821 | N, 32 bit number of compilation units or type units in the index | |
10822 | M, 32 bit number of slots in the hash table | |
80626a55 | 10823 | |
d2415c6c | 10824 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 10825 | |
d2415c6c DE |
10826 | The hash table begins at offset 16 in the section, and consists of an array |
10827 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
10828 | order of the application binary). Unused slots in the hash table are 0. | |
10829 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 10830 | |
d2415c6c DE |
10831 | The parallel table begins immediately after the hash table |
10832 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
10833 | array of 32-bit indexes (using the byte order of the application binary), | |
10834 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
10835 | table contains a 32-bit index into the pool of section numbers. For unused | |
10836 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 10837 | |
73869dc2 DE |
10838 | The pool of section numbers begins immediately following the hash table |
10839 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
10840 | section numbers consists of an array of 32-bit words (using the byte order | |
10841 | of the application binary). Each item in the array is indexed starting | |
10842 | from 0. The hash table entry provides the index of the first section | |
10843 | number in the set. Additional section numbers in the set follow, and the | |
10844 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
10845 | ||
10846 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10847 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10848 | be the second entry. Other members of the set may follow in any order. | |
10849 | ||
10850 | --- | |
10851 | ||
10852 | DWP Version 2: | |
10853 | ||
10854 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
10855 | and the entries in the index tables are now offsets into these sections. | |
10856 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10857 | section. | |
10858 | ||
10859 | Index Section Contents: | |
10860 | Header | |
10861 | Hash Table of Signatures dwp_hash_table.hash_table | |
10862 | Parallel Table of Indices dwp_hash_table.unit_table | |
10863 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
10864 | Table of Section Sizes dwp_hash_table.v2.sizes | |
10865 | ||
10866 | The index section header consists of: | |
10867 | ||
10868 | V, 32 bit version number | |
10869 | L, 32 bit number of columns in the table of section offsets | |
10870 | N, 32 bit number of compilation units or type units in the index | |
10871 | M, 32 bit number of slots in the hash table | |
10872 | ||
10873 | Numbers are recorded using the byte order of the application binary. | |
10874 | ||
10875 | The hash table has the same format as version 1. | |
10876 | The parallel table of indices has the same format as version 1, | |
10877 | except that the entries are origin-1 indices into the table of sections | |
10878 | offsets and the table of section sizes. | |
10879 | ||
10880 | The table of offsets begins immediately following the parallel table | |
10881 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10882 | a two-dimensional array of 32-bit words (using the byte order of the | |
10883 | application binary), with L columns and N+1 rows, in row-major order. | |
10884 | Each row in the array is indexed starting from 0. The first row provides | |
10885 | a key to the remaining rows: each column in this row provides an identifier | |
10886 | for a debug section, and the offsets in the same column of subsequent rows | |
10887 | refer to that section. The section identifiers are: | |
10888 | ||
10889 | DW_SECT_INFO 1 .debug_info.dwo | |
10890 | DW_SECT_TYPES 2 .debug_types.dwo | |
10891 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10892 | DW_SECT_LINE 4 .debug_line.dwo | |
10893 | DW_SECT_LOC 5 .debug_loc.dwo | |
10894 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10895 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10896 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10897 | ||
10898 | The offsets provided by the CU and TU index sections are the base offsets | |
10899 | for the contributions made by each CU or TU to the corresponding section | |
10900 | in the package file. Each CU and TU header contains an abbrev_offset | |
10901 | field, used to find the abbreviations table for that CU or TU within the | |
10902 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10903 | be interpreted as relative to the base offset given in the index section. | |
10904 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10905 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10906 | and offsets into other debug sections obtained from DWARF attributes should | |
10907 | also be interpreted as relative to the corresponding base offset. | |
10908 | ||
10909 | The table of sizes begins immediately following the table of offsets. | |
10910 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10911 | with L columns and N rows, in row-major order. Each row in the array is | |
10912 | indexed starting from 1 (row 0 is shared by the two tables). | |
10913 | ||
10914 | --- | |
10915 | ||
10916 | Hash table lookup is handled the same in version 1 and 2: | |
10917 | ||
10918 | We assume that N and M will not exceed 2^32 - 1. | |
10919 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10920 | ||
d2415c6c DE |
10921 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10922 | in the hash table is located as follows: | |
80626a55 | 10923 | |
d2415c6c DE |
10924 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10925 | the low-order k bits all set to 1. | |
80626a55 | 10926 | |
d2415c6c | 10927 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10928 | |
d2415c6c DE |
10929 | 3) If the hash table entry at index H matches the signature, use that |
10930 | entry. If the hash table entry at index H is unused (all zeroes), | |
10931 | terminate the search: the signature is not present in the table. | |
80626a55 | 10932 | |
d2415c6c | 10933 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10934 | |
d2415c6c | 10935 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10936 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10937 | |
10938 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10939 | .debug_{info,types}.dwo in DWP_FILE. | |
10940 | Returns NULL if there isn't one. | |
10941 | Note: This function processes DWP files only, not DWO files. */ | |
10942 | ||
10943 | static struct dwp_hash_table * | |
10944 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10945 | { | |
10946 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10947 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10948 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10949 | struct dwarf2_section_info *index; |
73869dc2 | 10950 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10951 | struct dwp_hash_table *htab; |
10952 | ||
10953 | if (is_debug_types) | |
10954 | index = &dwp_file->sections.tu_index; | |
10955 | else | |
10956 | index = &dwp_file->sections.cu_index; | |
10957 | ||
10958 | if (dwarf2_section_empty_p (index)) | |
10959 | return NULL; | |
10960 | dwarf2_read_section (objfile, index); | |
10961 | ||
10962 | index_ptr = index->buffer; | |
10963 | index_end = index_ptr + index->size; | |
10964 | ||
10965 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10966 | index_ptr += 4; |
10967 | if (version == 2) | |
10968 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10969 | else | |
10970 | nr_columns = 0; | |
10971 | index_ptr += 4; | |
80626a55 DE |
10972 | nr_units = read_4_bytes (dbfd, index_ptr); |
10973 | index_ptr += 4; | |
10974 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10975 | index_ptr += 4; | |
10976 | ||
73869dc2 | 10977 | if (version != 1 && version != 2) |
80626a55 | 10978 | { |
21aa081e | 10979 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10980 | " [in module %s]"), |
21aa081e | 10981 | pulongest (version), dwp_file->name); |
80626a55 DE |
10982 | } |
10983 | if (nr_slots != (nr_slots & -nr_slots)) | |
10984 | { | |
21aa081e | 10985 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10986 | " is not power of 2 [in module %s]"), |
21aa081e | 10987 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10988 | } |
10989 | ||
10990 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10991 | htab->version = version; |
10992 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10993 | htab->nr_units = nr_units; |
10994 | htab->nr_slots = nr_slots; | |
10995 | htab->hash_table = index_ptr; | |
10996 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10997 | |
10998 | /* Exit early if the table is empty. */ | |
10999 | if (nr_slots == 0 || nr_units == 0 | |
11000 | || (version == 2 && nr_columns == 0)) | |
11001 | { | |
11002 | /* All must be zero. */ | |
11003 | if (nr_slots != 0 || nr_units != 0 | |
11004 | || (version == 2 && nr_columns != 0)) | |
11005 | { | |
11006 | complaint (&symfile_complaints, | |
11007 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
11008 | " all zero [in modules %s]"), | |
11009 | dwp_file->name); | |
11010 | } | |
11011 | return htab; | |
11012 | } | |
11013 | ||
11014 | if (version == 1) | |
11015 | { | |
11016 | htab->section_pool.v1.indices = | |
11017 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11018 | /* It's harder to decide whether the section is too small in v1. | |
11019 | V1 is deprecated anyway so we punt. */ | |
11020 | } | |
11021 | else | |
11022 | { | |
11023 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11024 | int *ids = htab->section_pool.v2.section_ids; | |
11025 | /* Reverse map for error checking. */ | |
11026 | int ids_seen[DW_SECT_MAX + 1]; | |
11027 | int i; | |
11028 | ||
11029 | if (nr_columns < 2) | |
11030 | { | |
11031 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11032 | " in section table [in module %s]"), | |
11033 | dwp_file->name); | |
11034 | } | |
11035 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11036 | { | |
11037 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11038 | " in section table [in module %s]"), | |
11039 | dwp_file->name); | |
11040 | } | |
11041 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
11042 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
11043 | for (i = 0; i < nr_columns; ++i) | |
11044 | { | |
11045 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11046 | ||
11047 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11048 | { | |
11049 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11050 | " in section table [in module %s]"), | |
11051 | id, dwp_file->name); | |
11052 | } | |
11053 | if (ids_seen[id] != -1) | |
11054 | { | |
11055 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11056 | " id %d in section table [in module %s]"), | |
11057 | id, dwp_file->name); | |
11058 | } | |
11059 | ids_seen[id] = i; | |
11060 | ids[i] = id; | |
11061 | } | |
11062 | /* Must have exactly one info or types section. */ | |
11063 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11064 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11065 | != 1) | |
11066 | { | |
11067 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11068 | " DWO info/types section [in module %s]"), | |
11069 | dwp_file->name); | |
11070 | } | |
11071 | /* Must have an abbrev section. */ | |
11072 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11073 | { | |
11074 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11075 | " section [in module %s]"), | |
11076 | dwp_file->name); | |
11077 | } | |
11078 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11079 | htab->section_pool.v2.sizes = | |
11080 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11081 | * nr_units * nr_columns); | |
11082 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11083 | * nr_units * nr_columns)) | |
11084 | > index_end) | |
11085 | { | |
11086 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11087 | " [in module %s]"), | |
11088 | dwp_file->name); | |
11089 | } | |
11090 | } | |
80626a55 DE |
11091 | |
11092 | return htab; | |
11093 | } | |
11094 | ||
11095 | /* Update SECTIONS with the data from SECTP. | |
11096 | ||
11097 | This function is like the other "locate" section routines that are | |
11098 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 11099 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
11100 | |
11101 | The result is non-zero for success, or zero if an error was found. */ | |
11102 | ||
11103 | static int | |
73869dc2 DE |
11104 | locate_v1_virtual_dwo_sections (asection *sectp, |
11105 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11106 | { |
11107 | const struct dwop_section_names *names = &dwop_section_names; | |
11108 | ||
11109 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11110 | { | |
11111 | /* There can be only one. */ | |
049412e3 | 11112 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11113 | return 0; |
049412e3 | 11114 | sections->abbrev.s.section = sectp; |
80626a55 DE |
11115 | sections->abbrev.size = bfd_get_section_size (sectp); |
11116 | } | |
11117 | else if (section_is_p (sectp->name, &names->info_dwo) | |
11118 | || section_is_p (sectp->name, &names->types_dwo)) | |
11119 | { | |
11120 | /* There can be only one. */ | |
049412e3 | 11121 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11122 | return 0; |
049412e3 | 11123 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
11124 | sections->info_or_types.size = bfd_get_section_size (sectp); |
11125 | } | |
11126 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11127 | { | |
11128 | /* There can be only one. */ | |
049412e3 | 11129 | if (sections->line.s.section != NULL) |
80626a55 | 11130 | return 0; |
049412e3 | 11131 | sections->line.s.section = sectp; |
80626a55 DE |
11132 | sections->line.size = bfd_get_section_size (sectp); |
11133 | } | |
11134 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11135 | { | |
11136 | /* There can be only one. */ | |
049412e3 | 11137 | if (sections->loc.s.section != NULL) |
80626a55 | 11138 | return 0; |
049412e3 | 11139 | sections->loc.s.section = sectp; |
80626a55 DE |
11140 | sections->loc.size = bfd_get_section_size (sectp); |
11141 | } | |
11142 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11143 | { | |
11144 | /* There can be only one. */ | |
049412e3 | 11145 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11146 | return 0; |
049412e3 | 11147 | sections->macinfo.s.section = sectp; |
80626a55 DE |
11148 | sections->macinfo.size = bfd_get_section_size (sectp); |
11149 | } | |
11150 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11151 | { | |
11152 | /* There can be only one. */ | |
049412e3 | 11153 | if (sections->macro.s.section != NULL) |
80626a55 | 11154 | return 0; |
049412e3 | 11155 | sections->macro.s.section = sectp; |
80626a55 DE |
11156 | sections->macro.size = bfd_get_section_size (sectp); |
11157 | } | |
11158 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11159 | { | |
11160 | /* There can be only one. */ | |
049412e3 | 11161 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11162 | return 0; |
049412e3 | 11163 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
11164 | sections->str_offsets.size = bfd_get_section_size (sectp); |
11165 | } | |
11166 | else | |
11167 | { | |
11168 | /* No other kind of section is valid. */ | |
11169 | return 0; | |
11170 | } | |
11171 | ||
11172 | return 1; | |
11173 | } | |
11174 | ||
73869dc2 DE |
11175 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11176 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11177 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11178 | This is for DWP version 1 files. */ | |
80626a55 DE |
11179 | |
11180 | static struct dwo_unit * | |
73869dc2 DE |
11181 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
11182 | uint32_t unit_index, | |
11183 | const char *comp_dir, | |
11184 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
11185 | { |
11186 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
11187 | const struct dwp_hash_table *dwp_htab = |
11188 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
11189 | bfd *dbfd = dwp_file->dbfd; |
11190 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11191 | struct dwo_file *dwo_file; | |
11192 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11193 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11194 | void **dwo_file_slot; |
80626a55 DE |
11195 | int i; |
11196 | ||
73869dc2 DE |
11197 | gdb_assert (dwp_file->version == 1); |
11198 | ||
b4f54984 | 11199 | if (dwarf_read_debug) |
80626a55 | 11200 | { |
73869dc2 | 11201 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 11202 | kind, |
73869dc2 | 11203 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
11204 | dwp_file->name); |
11205 | } | |
11206 | ||
19ac8c2e | 11207 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11208 | Put a limit on the number of sections we look for so that bad data |
11209 | doesn't cause us to loop forever. */ | |
11210 | ||
73869dc2 | 11211 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11212 | (1 /* .debug_info or .debug_types */ \ |
11213 | + 1 /* .debug_abbrev */ \ | |
11214 | + 1 /* .debug_line */ \ | |
11215 | + 1 /* .debug_loc */ \ | |
11216 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11217 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11218 | + 1 /* trailing zero */) |
11219 | ||
11220 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11221 | |
73869dc2 | 11222 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11223 | { |
11224 | asection *sectp; | |
11225 | uint32_t section_nr = | |
11226 | read_4_bytes (dbfd, | |
73869dc2 DE |
11227 | dwp_htab->section_pool.v1.indices |
11228 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11229 | |
11230 | if (section_nr == 0) | |
11231 | break; | |
11232 | if (section_nr >= dwp_file->num_sections) | |
11233 | { | |
11234 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11235 | " [in module %s]"), | |
11236 | dwp_file->name); | |
11237 | } | |
11238 | ||
11239 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11240 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11241 | { |
11242 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11243 | " [in module %s]"), | |
11244 | dwp_file->name); | |
11245 | } | |
11246 | } | |
11247 | ||
11248 | if (i < 2 | |
a32a8923 DE |
11249 | || dwarf2_section_empty_p (§ions.info_or_types) |
11250 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
11251 | { |
11252 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11253 | " [in module %s]"), | |
11254 | dwp_file->name); | |
11255 | } | |
73869dc2 | 11256 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11257 | { |
11258 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11259 | " [in module %s]"), | |
11260 | dwp_file->name); | |
11261 | } | |
11262 | ||
11263 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11264 | have dwo_unit "live" in that. At least for now. | |
11265 | ||
11266 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11267 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11268 | file, we can combine them back into a virtual DWO file to save space |
11269 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11270 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11271 | ||
791afaa2 TT |
11272 | std::string virtual_dwo_name = |
11273 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
11274 | get_section_id (§ions.abbrev), | |
11275 | get_section_id (§ions.line), | |
11276 | get_section_id (§ions.loc), | |
11277 | get_section_id (§ions.str_offsets)); | |
80626a55 | 11278 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11279 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
80626a55 DE |
11280 | /* Create one if necessary. */ |
11281 | if (*dwo_file_slot == NULL) | |
11282 | { | |
b4f54984 | 11283 | if (dwarf_read_debug) |
80626a55 DE |
11284 | { |
11285 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11286 | virtual_dwo_name.c_str ()); |
80626a55 DE |
11287 | } |
11288 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11289 | dwo_file->dwo_name |
11290 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11291 | virtual_dwo_name.c_str (), |
11292 | virtual_dwo_name.size ()); | |
0ac5b59e | 11293 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11294 | dwo_file->sections.abbrev = sections.abbrev; |
11295 | dwo_file->sections.line = sections.line; | |
11296 | dwo_file->sections.loc = sections.loc; | |
11297 | dwo_file->sections.macinfo = sections.macinfo; | |
11298 | dwo_file->sections.macro = sections.macro; | |
11299 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11300 | /* The "str" section is global to the entire DWP file. */ | |
11301 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11302 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11303 | there's no need to record it in dwo_file. |
11304 | Also, we can't simply record type sections in dwo_file because | |
11305 | we record a pointer into the vector in dwo_unit. As we collect more | |
11306 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11307 | for it, invalidating all copies of pointers into the previous |
11308 | contents. */ | |
80626a55 DE |
11309 | *dwo_file_slot = dwo_file; |
11310 | } | |
11311 | else | |
11312 | { | |
b4f54984 | 11313 | if (dwarf_read_debug) |
80626a55 DE |
11314 | { |
11315 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11316 | virtual_dwo_name.c_str ()); |
80626a55 | 11317 | } |
9a3c8263 | 11318 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11319 | } |
80626a55 DE |
11320 | |
11321 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11322 | dwo_unit->dwo_file = dwo_file; | |
11323 | dwo_unit->signature = signature; | |
8d749320 SM |
11324 | dwo_unit->section = |
11325 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11326 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11327 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11328 | |
11329 | return dwo_unit; | |
11330 | } | |
11331 | ||
73869dc2 DE |
11332 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11333 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11334 | piece within that section used by a TU/CU, return a virtual section | |
11335 | of just that piece. */ | |
11336 | ||
11337 | static struct dwarf2_section_info | |
11338 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
11339 | bfd_size_type offset, bfd_size_type size) | |
11340 | { | |
11341 | struct dwarf2_section_info result; | |
11342 | asection *sectp; | |
11343 | ||
11344 | gdb_assert (section != NULL); | |
11345 | gdb_assert (!section->is_virtual); | |
11346 | ||
11347 | memset (&result, 0, sizeof (result)); | |
11348 | result.s.containing_section = section; | |
11349 | result.is_virtual = 1; | |
11350 | ||
11351 | if (size == 0) | |
11352 | return result; | |
11353 | ||
11354 | sectp = get_section_bfd_section (section); | |
11355 | ||
11356 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11357 | bounds of the real section. This is a pretty-rare event, so just | |
11358 | flag an error (easier) instead of a warning and trying to cope. */ | |
11359 | if (sectp == NULL | |
11360 | || offset + size > bfd_get_section_size (sectp)) | |
11361 | { | |
11362 | bfd *abfd = sectp->owner; | |
11363 | ||
11364 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
11365 | " in section %s [in module %s]"), | |
11366 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
11367 | objfile_name (dwarf2_per_objfile->objfile)); | |
11368 | } | |
11369 | ||
11370 | result.virtual_offset = offset; | |
11371 | result.size = size; | |
11372 | return result; | |
11373 | } | |
11374 | ||
11375 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11376 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11377 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11378 | This is for DWP version 2 files. */ | |
11379 | ||
11380 | static struct dwo_unit * | |
11381 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
11382 | uint32_t unit_index, | |
11383 | const char *comp_dir, | |
11384 | ULONGEST signature, int is_debug_types) | |
11385 | { | |
11386 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11387 | const struct dwp_hash_table *dwp_htab = | |
11388 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11389 | bfd *dbfd = dwp_file->dbfd; | |
11390 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11391 | struct dwo_file *dwo_file; | |
11392 | struct dwo_unit *dwo_unit; | |
11393 | struct virtual_v2_dwo_sections sections; | |
11394 | void **dwo_file_slot; | |
73869dc2 DE |
11395 | int i; |
11396 | ||
11397 | gdb_assert (dwp_file->version == 2); | |
11398 | ||
b4f54984 | 11399 | if (dwarf_read_debug) |
73869dc2 DE |
11400 | { |
11401 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11402 | kind, | |
11403 | pulongest (unit_index), hex_string (signature), | |
11404 | dwp_file->name); | |
11405 | } | |
11406 | ||
11407 | /* Fetch the section offsets of this DWO unit. */ | |
11408 | ||
11409 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11410 | |
11411 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11412 | { | |
11413 | uint32_t offset = read_4_bytes (dbfd, | |
11414 | dwp_htab->section_pool.v2.offsets | |
11415 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11416 | + i) | |
11417 | * sizeof (uint32_t))); | |
11418 | uint32_t size = read_4_bytes (dbfd, | |
11419 | dwp_htab->section_pool.v2.sizes | |
11420 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11421 | + i) | |
11422 | * sizeof (uint32_t))); | |
11423 | ||
11424 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11425 | { | |
11426 | case DW_SECT_INFO: | |
11427 | case DW_SECT_TYPES: | |
11428 | sections.info_or_types_offset = offset; | |
11429 | sections.info_or_types_size = size; | |
11430 | break; | |
11431 | case DW_SECT_ABBREV: | |
11432 | sections.abbrev_offset = offset; | |
11433 | sections.abbrev_size = size; | |
11434 | break; | |
11435 | case DW_SECT_LINE: | |
11436 | sections.line_offset = offset; | |
11437 | sections.line_size = size; | |
11438 | break; | |
11439 | case DW_SECT_LOC: | |
11440 | sections.loc_offset = offset; | |
11441 | sections.loc_size = size; | |
11442 | break; | |
11443 | case DW_SECT_STR_OFFSETS: | |
11444 | sections.str_offsets_offset = offset; | |
11445 | sections.str_offsets_size = size; | |
11446 | break; | |
11447 | case DW_SECT_MACINFO: | |
11448 | sections.macinfo_offset = offset; | |
11449 | sections.macinfo_size = size; | |
11450 | break; | |
11451 | case DW_SECT_MACRO: | |
11452 | sections.macro_offset = offset; | |
11453 | sections.macro_size = size; | |
11454 | break; | |
11455 | } | |
11456 | } | |
11457 | ||
11458 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11459 | have dwo_unit "live" in that. At least for now. | |
11460 | ||
11461 | The DWP file can be made up of a random collection of CUs and TUs. | |
11462 | However, for each CU + set of TUs that came from the same original DWO | |
11463 | file, we can combine them back into a virtual DWO file to save space | |
11464 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11465 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11466 | ||
791afaa2 TT |
11467 | std::string virtual_dwo_name = |
11468 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11469 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11470 | (long) (sections.line_size ? sections.line_offset : 0), | |
11471 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11472 | (long) (sections.str_offsets_size | |
11473 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11474 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11475 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
73869dc2 DE |
11476 | /* Create one if necessary. */ |
11477 | if (*dwo_file_slot == NULL) | |
11478 | { | |
b4f54984 | 11479 | if (dwarf_read_debug) |
73869dc2 DE |
11480 | { |
11481 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11482 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
11483 | } |
11484 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11485 | dwo_file->dwo_name |
11486 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11487 | virtual_dwo_name.c_str (), |
11488 | virtual_dwo_name.size ()); | |
73869dc2 DE |
11489 | dwo_file->comp_dir = comp_dir; |
11490 | dwo_file->sections.abbrev = | |
11491 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
11492 | sections.abbrev_offset, sections.abbrev_size); | |
11493 | dwo_file->sections.line = | |
11494 | create_dwp_v2_section (&dwp_file->sections.line, | |
11495 | sections.line_offset, sections.line_size); | |
11496 | dwo_file->sections.loc = | |
11497 | create_dwp_v2_section (&dwp_file->sections.loc, | |
11498 | sections.loc_offset, sections.loc_size); | |
11499 | dwo_file->sections.macinfo = | |
11500 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
11501 | sections.macinfo_offset, sections.macinfo_size); | |
11502 | dwo_file->sections.macro = | |
11503 | create_dwp_v2_section (&dwp_file->sections.macro, | |
11504 | sections.macro_offset, sections.macro_size); | |
11505 | dwo_file->sections.str_offsets = | |
11506 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
11507 | sections.str_offsets_offset, | |
11508 | sections.str_offsets_size); | |
11509 | /* The "str" section is global to the entire DWP file. */ | |
11510 | dwo_file->sections.str = dwp_file->sections.str; | |
11511 | /* The info or types section is assigned below to dwo_unit, | |
11512 | there's no need to record it in dwo_file. | |
11513 | Also, we can't simply record type sections in dwo_file because | |
11514 | we record a pointer into the vector in dwo_unit. As we collect more | |
11515 | types we'll grow the vector and eventually have to reallocate space | |
11516 | for it, invalidating all copies of pointers into the previous | |
11517 | contents. */ | |
11518 | *dwo_file_slot = dwo_file; | |
11519 | } | |
11520 | else | |
11521 | { | |
b4f54984 | 11522 | if (dwarf_read_debug) |
73869dc2 DE |
11523 | { |
11524 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11525 | virtual_dwo_name.c_str ()); |
73869dc2 | 11526 | } |
9a3c8263 | 11527 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11528 | } |
73869dc2 DE |
11529 | |
11530 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11531 | dwo_unit->dwo_file = dwo_file; | |
11532 | dwo_unit->signature = signature; | |
8d749320 SM |
11533 | dwo_unit->section = |
11534 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
11535 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
11536 | ? &dwp_file->sections.types | |
11537 | : &dwp_file->sections.info, | |
11538 | sections.info_or_types_offset, | |
11539 | sections.info_or_types_size); | |
11540 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11541 | ||
11542 | return dwo_unit; | |
11543 | } | |
11544 | ||
57d63ce2 DE |
11545 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11546 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11547 | |
11548 | static struct dwo_unit * | |
57d63ce2 DE |
11549 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
11550 | ULONGEST signature, int is_debug_types) | |
80626a55 | 11551 | { |
57d63ce2 DE |
11552 | const struct dwp_hash_table *dwp_htab = |
11553 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 11554 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 11555 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11556 | uint32_t hash = signature & mask; |
11557 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11558 | unsigned int i; | |
11559 | void **slot; | |
870f88f7 | 11560 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11561 | |
11562 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11563 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
11564 | slot = htab_find_slot (is_debug_types |
11565 | ? dwp_file->loaded_tus | |
11566 | : dwp_file->loaded_cus, | |
11567 | &find_dwo_cu, INSERT); | |
80626a55 DE |
11568 | |
11569 | if (*slot != NULL) | |
9a3c8263 | 11570 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11571 | |
11572 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11573 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11574 | { |
11575 | ULONGEST signature_in_table; | |
11576 | ||
11577 | signature_in_table = | |
57d63ce2 | 11578 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11579 | if (signature_in_table == signature) |
11580 | { | |
57d63ce2 DE |
11581 | uint32_t unit_index = |
11582 | read_4_bytes (dbfd, | |
11583 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11584 | |
73869dc2 DE |
11585 | if (dwp_file->version == 1) |
11586 | { | |
11587 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
11588 | comp_dir, signature, | |
11589 | is_debug_types); | |
11590 | } | |
11591 | else | |
11592 | { | |
11593 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
11594 | comp_dir, signature, | |
11595 | is_debug_types); | |
11596 | } | |
9a3c8263 | 11597 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11598 | } |
11599 | if (signature_in_table == 0) | |
11600 | return NULL; | |
11601 | hash = (hash + hash2) & mask; | |
11602 | } | |
11603 | ||
11604 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11605 | " [in module %s]"), | |
11606 | dwp_file->name); | |
11607 | } | |
11608 | ||
ab5088bf | 11609 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11610 | Open the file specified by FILE_NAME and hand it off to BFD for |
11611 | preliminary analysis. Return a newly initialized bfd *, which | |
11612 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 11613 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
11614 | SEARCH_CWD is true if the current directory is to be searched. |
11615 | It will be searched before debug-file-directory. | |
13aaf454 DE |
11616 | If successful, the file is added to the bfd include table of the |
11617 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 11618 | If unable to find/open the file, return NULL. |
3019eac3 DE |
11619 | NOTE: This function is derived from symfile_bfd_open. */ |
11620 | ||
192b62ce | 11621 | static gdb_bfd_ref_ptr |
6ac97d4c | 11622 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 11623 | { |
80626a55 | 11624 | int desc, flags; |
3019eac3 | 11625 | char *absolute_name; |
9c02c129 DE |
11626 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
11627 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
11628 | to debug_file_directory. */ | |
11629 | char *search_path; | |
11630 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
11631 | ||
6ac97d4c DE |
11632 | if (search_cwd) |
11633 | { | |
11634 | if (*debug_file_directory != '\0') | |
11635 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 11636 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
11637 | else |
11638 | search_path = xstrdup ("."); | |
11639 | } | |
9c02c129 | 11640 | else |
6ac97d4c | 11641 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 11642 | |
492c0ab7 | 11643 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
11644 | if (is_dwp) |
11645 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 11646 | desc = openp (search_path, flags, file_name, |
3019eac3 | 11647 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 11648 | xfree (search_path); |
3019eac3 DE |
11649 | if (desc < 0) |
11650 | return NULL; | |
11651 | ||
192b62ce | 11652 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 11653 | xfree (absolute_name); |
9c02c129 DE |
11654 | if (sym_bfd == NULL) |
11655 | return NULL; | |
192b62ce | 11656 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 11657 | |
192b62ce TT |
11658 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
11659 | return NULL; | |
3019eac3 | 11660 | |
13aaf454 DE |
11661 | /* Success. Record the bfd as having been included by the objfile's bfd. |
11662 | This is important because things like demangled_names_hash lives in the | |
11663 | objfile's per_bfd space and may have references to things like symbol | |
11664 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 11665 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 11666 | |
3019eac3 DE |
11667 | return sym_bfd; |
11668 | } | |
11669 | ||
ab5088bf | 11670 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
11671 | COMP_DIR is the DW_AT_comp_dir attribute. |
11672 | The result is the bfd handle of the file. | |
11673 | If there is a problem finding or opening the file, return NULL. | |
11674 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11675 | same as symfile_bfd_open. */ | |
11676 | ||
192b62ce | 11677 | static gdb_bfd_ref_ptr |
ab5088bf | 11678 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 11679 | { |
80626a55 | 11680 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 11681 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
11682 | |
11683 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
11684 | ||
11685 | if (comp_dir != NULL) | |
11686 | { | |
b36cec19 PA |
11687 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
11688 | file_name, (char *) NULL); | |
3019eac3 DE |
11689 | |
11690 | /* NOTE: If comp_dir is a relative path, this will also try the | |
11691 | search path, which seems useful. */ | |
192b62ce TT |
11692 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
11693 | 1 /*search_cwd*/)); | |
3019eac3 DE |
11694 | xfree (path_to_try); |
11695 | if (abfd != NULL) | |
11696 | return abfd; | |
11697 | } | |
11698 | ||
11699 | /* That didn't work, try debug-file-directory, which, despite its name, | |
11700 | is a list of paths. */ | |
11701 | ||
11702 | if (*debug_file_directory == '\0') | |
11703 | return NULL; | |
11704 | ||
6ac97d4c | 11705 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
11706 | } |
11707 | ||
80626a55 DE |
11708 | /* This function is mapped across the sections and remembers the offset and |
11709 | size of each of the DWO debugging sections we are interested in. */ | |
11710 | ||
11711 | static void | |
11712 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
11713 | { | |
9a3c8263 | 11714 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
11715 | const struct dwop_section_names *names = &dwop_section_names; |
11716 | ||
11717 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11718 | { | |
049412e3 | 11719 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
11720 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
11721 | } | |
11722 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11723 | { | |
049412e3 | 11724 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
11725 | dwo_sections->info.size = bfd_get_section_size (sectp); |
11726 | } | |
11727 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11728 | { | |
049412e3 | 11729 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
11730 | dwo_sections->line.size = bfd_get_section_size (sectp); |
11731 | } | |
11732 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11733 | { | |
049412e3 | 11734 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
11735 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
11736 | } | |
11737 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11738 | { | |
049412e3 | 11739 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
11740 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
11741 | } | |
11742 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11743 | { | |
049412e3 | 11744 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
11745 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
11746 | } | |
11747 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
11748 | { | |
049412e3 | 11749 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
11750 | dwo_sections->str.size = bfd_get_section_size (sectp); |
11751 | } | |
11752 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11753 | { | |
049412e3 | 11754 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
11755 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
11756 | } | |
11757 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11758 | { | |
11759 | struct dwarf2_section_info type_section; | |
11760 | ||
11761 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 11762 | type_section.s.section = sectp; |
80626a55 DE |
11763 | type_section.size = bfd_get_section_size (sectp); |
11764 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
11765 | &type_section); | |
11766 | } | |
11767 | } | |
11768 | ||
ab5088bf | 11769 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 11770 | by PER_CU. This is for the non-DWP case. |
80626a55 | 11771 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
11772 | |
11773 | static struct dwo_file * | |
0ac5b59e DE |
11774 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
11775 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
11776 | { |
11777 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 11778 | struct dwo_file *dwo_file; |
3019eac3 DE |
11779 | struct cleanup *cleanups; |
11780 | ||
192b62ce | 11781 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
11782 | if (dbfd == NULL) |
11783 | { | |
b4f54984 | 11784 | if (dwarf_read_debug) |
80626a55 DE |
11785 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
11786 | return NULL; | |
11787 | } | |
11788 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
11789 | dwo_file->dwo_name = dwo_name; |
11790 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 11791 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
11792 | |
11793 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
11794 | ||
192b62ce TT |
11795 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
11796 | &dwo_file->sections); | |
3019eac3 | 11797 | |
33c5cd75 | 11798 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 11799 | |
78d4d2c5 JK |
11800 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
11801 | dwo_file->tus); | |
3019eac3 DE |
11802 | |
11803 | discard_cleanups (cleanups); | |
11804 | ||
b4f54984 | 11805 | if (dwarf_read_debug) |
80626a55 DE |
11806 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
11807 | ||
3019eac3 DE |
11808 | return dwo_file; |
11809 | } | |
11810 | ||
80626a55 | 11811 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
11812 | size of each of the DWP debugging sections common to version 1 and 2 that |
11813 | we are interested in. */ | |
3019eac3 | 11814 | |
80626a55 | 11815 | static void |
73869dc2 DE |
11816 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
11817 | void *dwp_file_ptr) | |
3019eac3 | 11818 | { |
9a3c8263 | 11819 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
11820 | const struct dwop_section_names *names = &dwop_section_names; |
11821 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 11822 | |
80626a55 | 11823 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 11824 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
11825 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
11826 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 11827 | |
80626a55 DE |
11828 | /* Look for specific sections that we need. */ |
11829 | if (section_is_p (sectp->name, &names->str_dwo)) | |
11830 | { | |
049412e3 | 11831 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
11832 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
11833 | } | |
11834 | else if (section_is_p (sectp->name, &names->cu_index)) | |
11835 | { | |
049412e3 | 11836 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
11837 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
11838 | } | |
11839 | else if (section_is_p (sectp->name, &names->tu_index)) | |
11840 | { | |
049412e3 | 11841 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
11842 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
11843 | } | |
11844 | } | |
3019eac3 | 11845 | |
73869dc2 DE |
11846 | /* This function is mapped across the sections and remembers the offset and |
11847 | size of each of the DWP version 2 debugging sections that we are interested | |
11848 | in. This is split into a separate function because we don't know if we | |
11849 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
11850 | ||
11851 | static void | |
11852 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
11853 | { | |
9a3c8263 | 11854 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
11855 | const struct dwop_section_names *names = &dwop_section_names; |
11856 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
11857 | ||
11858 | /* Record the ELF section number for later lookup: this is what the | |
11859 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
11860 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
11861 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
11862 | ||
11863 | /* Look for specific sections that we need. */ | |
11864 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11865 | { | |
049412e3 | 11866 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
11867 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
11868 | } | |
11869 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11870 | { | |
049412e3 | 11871 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
11872 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
11873 | } | |
11874 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11875 | { | |
049412e3 | 11876 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11877 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11878 | } | |
11879 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11880 | { | |
049412e3 | 11881 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11882 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11883 | } | |
11884 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11885 | { | |
049412e3 | 11886 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11887 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11888 | } | |
11889 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11890 | { | |
049412e3 | 11891 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11892 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11893 | } | |
11894 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11895 | { | |
049412e3 | 11896 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11897 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11898 | } | |
11899 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11900 | { | |
049412e3 | 11901 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11902 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11903 | } | |
11904 | } | |
11905 | ||
80626a55 | 11906 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11907 | |
80626a55 DE |
11908 | static hashval_t |
11909 | hash_dwp_loaded_cutus (const void *item) | |
11910 | { | |
9a3c8263 | 11911 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11912 | |
80626a55 DE |
11913 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11914 | return dwo_unit->signature; | |
3019eac3 DE |
11915 | } |
11916 | ||
80626a55 | 11917 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11918 | |
80626a55 DE |
11919 | static int |
11920 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11921 | { |
9a3c8263 SM |
11922 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11923 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11924 | |
80626a55 DE |
11925 | return dua->signature == dub->signature; |
11926 | } | |
3019eac3 | 11927 | |
80626a55 | 11928 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11929 | |
80626a55 DE |
11930 | static htab_t |
11931 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11932 | { | |
11933 | return htab_create_alloc_ex (3, | |
11934 | hash_dwp_loaded_cutus, | |
11935 | eq_dwp_loaded_cutus, | |
11936 | NULL, | |
11937 | &objfile->objfile_obstack, | |
11938 | hashtab_obstack_allocate, | |
11939 | dummy_obstack_deallocate); | |
11940 | } | |
3019eac3 | 11941 | |
ab5088bf DE |
11942 | /* Try to open DWP file FILE_NAME. |
11943 | The result is the bfd handle of the file. | |
11944 | If there is a problem finding or opening the file, return NULL. | |
11945 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11946 | same as symfile_bfd_open. */ | |
11947 | ||
192b62ce | 11948 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11949 | open_dwp_file (const char *file_name) |
11950 | { | |
192b62ce TT |
11951 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11952 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11953 | if (abfd != NULL) |
11954 | return abfd; | |
11955 | ||
11956 | /* Work around upstream bug 15652. | |
11957 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11958 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11959 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11960 | of the executable's path may have discarded the needed info. | |
11961 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11962 | .gnu_debuglink, but that doesn't exist yet.] | |
11963 | Strip the directory from FILE_NAME and search again. */ | |
11964 | if (*debug_file_directory != '\0') | |
11965 | { | |
11966 | /* Don't implicitly search the current directory here. | |
11967 | If the user wants to search "." to handle this case, | |
11968 | it must be added to debug-file-directory. */ | |
11969 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11970 | 0 /*search_cwd*/); | |
11971 | } | |
11972 | ||
11973 | return NULL; | |
ab5088bf DE |
11974 | } |
11975 | ||
80626a55 DE |
11976 | /* Initialize the use of the DWP file for the current objfile. |
11977 | By convention the name of the DWP file is ${objfile}.dwp. | |
11978 | The result is NULL if it can't be found. */ | |
a766d390 | 11979 | |
80626a55 | 11980 | static struct dwp_file * |
ab5088bf | 11981 | open_and_init_dwp_file (void) |
80626a55 DE |
11982 | { |
11983 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11984 | struct dwp_file *dwp_file; | |
80626a55 | 11985 | |
82bf32bc JK |
11986 | /* Try to find first .dwp for the binary file before any symbolic links |
11987 | resolving. */ | |
6c447423 DE |
11988 | |
11989 | /* If the objfile is a debug file, find the name of the real binary | |
11990 | file and get the name of dwp file from there. */ | |
d721ba37 | 11991 | std::string dwp_name; |
6c447423 DE |
11992 | if (objfile->separate_debug_objfile_backlink != NULL) |
11993 | { | |
11994 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11995 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11996 | |
d721ba37 | 11997 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11998 | } |
11999 | else | |
d721ba37 PA |
12000 | dwp_name = objfile->original_name; |
12001 | ||
12002 | dwp_name += ".dwp"; | |
80626a55 | 12003 | |
d721ba37 | 12004 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
12005 | if (dbfd == NULL |
12006 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
12007 | { | |
12008 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
12009 | dwp_name = objfile_name (objfile); |
12010 | dwp_name += ".dwp"; | |
12011 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
12012 | } |
12013 | ||
80626a55 DE |
12014 | if (dbfd == NULL) |
12015 | { | |
b4f54984 | 12016 | if (dwarf_read_debug) |
d721ba37 | 12017 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 12018 | return NULL; |
3019eac3 | 12019 | } |
80626a55 | 12020 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
12021 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
12022 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 12023 | |
80626a55 | 12024 | /* +1: section 0 is unused */ |
192b62ce | 12025 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
12026 | dwp_file->elf_sections = |
12027 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
12028 | dwp_file->num_sections, asection *); | |
12029 | ||
192b62ce TT |
12030 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
12031 | dwp_file); | |
80626a55 DE |
12032 | |
12033 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
12034 | ||
12035 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
12036 | ||
73869dc2 | 12037 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12038 | if (dwp_file->cus && dwp_file->tus |
12039 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12040 | { |
12041 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12042 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12043 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12044 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12045 | " TU version %s [in DWP file %s]"), | |
12046 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12047 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12048 | } |
08302ed2 DE |
12049 | |
12050 | if (dwp_file->cus) | |
12051 | dwp_file->version = dwp_file->cus->version; | |
12052 | else if (dwp_file->tus) | |
12053 | dwp_file->version = dwp_file->tus->version; | |
12054 | else | |
12055 | dwp_file->version = 2; | |
73869dc2 DE |
12056 | |
12057 | if (dwp_file->version == 2) | |
192b62ce TT |
12058 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
12059 | dwp_file); | |
73869dc2 | 12060 | |
19ac8c2e DE |
12061 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
12062 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 12063 | |
b4f54984 | 12064 | if (dwarf_read_debug) |
80626a55 DE |
12065 | { |
12066 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
12067 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
12068 | " %s CUs, %s TUs\n", |
12069 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12070 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12071 | } |
12072 | ||
12073 | return dwp_file; | |
3019eac3 | 12074 | } |
c906108c | 12075 | |
ab5088bf DE |
12076 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12077 | ||
12078 | static struct dwp_file * | |
12079 | get_dwp_file (void) | |
12080 | { | |
12081 | if (! dwarf2_per_objfile->dwp_checked) | |
12082 | { | |
12083 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
12084 | dwarf2_per_objfile->dwp_checked = 1; | |
12085 | } | |
12086 | return dwarf2_per_objfile->dwp_file; | |
12087 | } | |
12088 | ||
80626a55 DE |
12089 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12090 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12091 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12092 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12093 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12094 | ||
12095 | This is called, for example, when wanting to read a variable with a | |
12096 | complex location. Therefore we don't want to do file i/o for every call. | |
12097 | Therefore we don't want to look for a DWO file on every call. | |
12098 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12099 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12100 | for a DWO file. | |
12101 | ||
1c658ad5 | 12102 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12103 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12104 | |
3019eac3 | 12105 | static struct dwo_unit * |
80626a55 DE |
12106 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
12107 | const char *dwo_name, const char *comp_dir, | |
12108 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
12109 | { |
12110 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
12111 | const char *kind = is_debug_types ? "TU" : "CU"; |
12112 | void **dwo_file_slot; | |
3019eac3 | 12113 | struct dwo_file *dwo_file; |
80626a55 | 12114 | struct dwp_file *dwp_file; |
cb1df416 | 12115 | |
6a506a2d DE |
12116 | /* First see if there's a DWP file. |
12117 | If we have a DWP file but didn't find the DWO inside it, don't | |
12118 | look for the original DWO file. It makes gdb behave differently | |
12119 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12120 | |
ab5088bf | 12121 | dwp_file = get_dwp_file (); |
80626a55 | 12122 | if (dwp_file != NULL) |
cf2c3c16 | 12123 | { |
80626a55 DE |
12124 | const struct dwp_hash_table *dwp_htab = |
12125 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12126 | ||
12127 | if (dwp_htab != NULL) | |
12128 | { | |
12129 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
12130 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
12131 | signature, is_debug_types); | |
80626a55 DE |
12132 | |
12133 | if (dwo_cutu != NULL) | |
12134 | { | |
b4f54984 | 12135 | if (dwarf_read_debug) |
80626a55 DE |
12136 | { |
12137 | fprintf_unfiltered (gdb_stdlog, | |
12138 | "Virtual DWO %s %s found: @%s\n", | |
12139 | kind, hex_string (signature), | |
12140 | host_address_to_string (dwo_cutu)); | |
12141 | } | |
12142 | return dwo_cutu; | |
12143 | } | |
12144 | } | |
12145 | } | |
6a506a2d | 12146 | else |
80626a55 | 12147 | { |
6a506a2d | 12148 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12149 | |
6a506a2d DE |
12150 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
12151 | if (*dwo_file_slot == NULL) | |
80626a55 | 12152 | { |
6a506a2d DE |
12153 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
12154 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 12155 | } |
6a506a2d | 12156 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12157 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12158 | |
6a506a2d | 12159 | if (dwo_file != NULL) |
19c3d4c9 | 12160 | { |
6a506a2d DE |
12161 | struct dwo_unit *dwo_cutu = NULL; |
12162 | ||
12163 | if (is_debug_types && dwo_file->tus) | |
12164 | { | |
12165 | struct dwo_unit find_dwo_cutu; | |
12166 | ||
12167 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12168 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
12169 | dwo_cutu |
12170 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 12171 | } |
33c5cd75 | 12172 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12173 | { |
33c5cd75 DB |
12174 | struct dwo_unit find_dwo_cutu; |
12175 | ||
12176 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12177 | find_dwo_cutu.signature = signature; | |
12178 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
12179 | &find_dwo_cutu); | |
6a506a2d DE |
12180 | } |
12181 | ||
12182 | if (dwo_cutu != NULL) | |
12183 | { | |
b4f54984 | 12184 | if (dwarf_read_debug) |
6a506a2d DE |
12185 | { |
12186 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
12187 | kind, dwo_name, hex_string (signature), | |
12188 | host_address_to_string (dwo_cutu)); | |
12189 | } | |
12190 | return dwo_cutu; | |
80626a55 DE |
12191 | } |
12192 | } | |
2e276125 | 12193 | } |
9cdd5dbd | 12194 | |
80626a55 DE |
12195 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12196 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12197 | correctly to find the file. */ | |
12198 | ||
b4f54984 | 12199 | if (dwarf_read_debug) |
80626a55 DE |
12200 | { |
12201 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
12202 | kind, dwo_name, hex_string (signature)); | |
12203 | } | |
3019eac3 | 12204 | |
6656a72d DE |
12205 | /* This is a warning and not a complaint because it can be caused by |
12206 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12207 | { |
12208 | /* Print the name of the DWP file if we looked there, helps the user | |
12209 | better diagnose the problem. */ | |
791afaa2 | 12210 | std::string dwp_text; |
43942612 DE |
12211 | |
12212 | if (dwp_file != NULL) | |
791afaa2 TT |
12213 | dwp_text = string_printf (" [in DWP file %s]", |
12214 | lbasename (dwp_file->name)); | |
43942612 DE |
12215 | |
12216 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
12217 | " [in module %s]"), | |
12218 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 12219 | dwp_text.c_str (), |
43942612 | 12220 | this_unit->is_debug_types ? "TU" : "CU", |
9c541725 | 12221 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 12222 | } |
3019eac3 | 12223 | return NULL; |
5fb290d7 DJ |
12224 | } |
12225 | ||
80626a55 DE |
12226 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12227 | See lookup_dwo_cutu_unit for details. */ | |
12228 | ||
12229 | static struct dwo_unit * | |
12230 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
12231 | const char *dwo_name, const char *comp_dir, | |
12232 | ULONGEST signature) | |
12233 | { | |
12234 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
12235 | } | |
12236 | ||
12237 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12238 | See lookup_dwo_cutu_unit for details. */ | |
12239 | ||
12240 | static struct dwo_unit * | |
12241 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
12242 | const char *dwo_name, const char *comp_dir) | |
12243 | { | |
12244 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
12245 | } | |
12246 | ||
89e63ee4 DE |
12247 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12248 | ||
12249 | static int | |
12250 | queue_and_load_dwo_tu (void **slot, void *info) | |
12251 | { | |
12252 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
12253 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
12254 | ULONGEST signature = dwo_unit->signature; | |
12255 | struct signatured_type *sig_type = | |
12256 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
12257 | ||
12258 | if (sig_type != NULL) | |
12259 | { | |
12260 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
12261 | ||
12262 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
12263 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12264 | while processing PER_CU. */ | |
12265 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
12266 | load_full_type_unit (sig_cu); | |
12267 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
12268 | } | |
12269 | ||
12270 | return 1; | |
12271 | } | |
12272 | ||
12273 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
12274 | The DWO may have the only definition of the type, though it may not be | |
12275 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12276 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12277 | ||
12278 | static void | |
12279 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
12280 | { | |
12281 | struct dwo_unit *dwo_unit; | |
12282 | struct dwo_file *dwo_file; | |
12283 | ||
12284 | gdb_assert (!per_cu->is_debug_types); | |
12285 | gdb_assert (get_dwp_file () == NULL); | |
12286 | gdb_assert (per_cu->cu != NULL); | |
12287 | ||
12288 | dwo_unit = per_cu->cu->dwo_unit; | |
12289 | gdb_assert (dwo_unit != NULL); | |
12290 | ||
12291 | dwo_file = dwo_unit->dwo_file; | |
12292 | if (dwo_file->tus != NULL) | |
12293 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
12294 | } | |
12295 | ||
3019eac3 DE |
12296 | /* Free all resources associated with DWO_FILE. |
12297 | Close the DWO file and munmap the sections. | |
12298 | All memory should be on the objfile obstack. */ | |
348e048f DE |
12299 | |
12300 | static void | |
3019eac3 | 12301 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 12302 | { |
348e048f | 12303 | |
5c6fa7ab | 12304 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 12305 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 12306 | |
3019eac3 DE |
12307 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
12308 | } | |
348e048f | 12309 | |
3019eac3 | 12310 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 12311 | |
3019eac3 DE |
12312 | static void |
12313 | free_dwo_file_cleanup (void *arg) | |
12314 | { | |
12315 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
12316 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 12317 | |
3019eac3 DE |
12318 | free_dwo_file (dwo_file, objfile); |
12319 | } | |
348e048f | 12320 | |
3019eac3 | 12321 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 12322 | |
3019eac3 DE |
12323 | static int |
12324 | free_dwo_file_from_slot (void **slot, void *info) | |
12325 | { | |
12326 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
12327 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 12328 | |
3019eac3 | 12329 | free_dwo_file (dwo_file, objfile); |
348e048f | 12330 | |
3019eac3 DE |
12331 | return 1; |
12332 | } | |
348e048f | 12333 | |
3019eac3 | 12334 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 12335 | |
3019eac3 DE |
12336 | static void |
12337 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
12338 | { | |
12339 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 12340 | } |
3019eac3 DE |
12341 | \f |
12342 | /* Read in various DIEs. */ | |
348e048f | 12343 | |
d389af10 | 12344 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12345 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12346 | already referenced by DW_AT_abstract_origin from the children of the | |
12347 | current DIE. */ | |
d389af10 JK |
12348 | |
12349 | static void | |
12350 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12351 | { | |
12352 | struct die_info *child_die; | |
791afaa2 | 12353 | sect_offset *offsetp; |
d389af10 JK |
12354 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12355 | struct die_info *origin_die; | |
12356 | /* Iterator of the ORIGIN_DIE children. */ | |
12357 | struct die_info *origin_child_die; | |
d389af10 | 12358 | struct attribute *attr; |
cd02d79d PA |
12359 | struct dwarf2_cu *origin_cu; |
12360 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12361 | |
12362 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12363 | if (!attr) | |
12364 | return; | |
12365 | ||
cd02d79d PA |
12366 | /* Note that following die references may follow to a die in a |
12367 | different cu. */ | |
12368 | ||
12369 | origin_cu = cu; | |
12370 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12371 | ||
12372 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12373 | symbols in. */ | |
12374 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12375 | origin_cu->list_in_scope = cu->list_in_scope; | |
12376 | ||
edb3359d DJ |
12377 | if (die->tag != origin_die->tag |
12378 | && !(die->tag == DW_TAG_inlined_subroutine | |
12379 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12380 | complaint (&symfile_complaints, |
12381 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
12382 | to_underlying (die->sect_off), |
12383 | to_underlying (origin_die->sect_off)); | |
d389af10 | 12384 | |
791afaa2 | 12385 | std::vector<sect_offset> offsets; |
d389af10 | 12386 | |
3ea89b92 PMR |
12387 | for (child_die = die->child; |
12388 | child_die && child_die->tag; | |
12389 | child_die = sibling_die (child_die)) | |
12390 | { | |
12391 | struct die_info *child_origin_die; | |
12392 | struct dwarf2_cu *child_origin_cu; | |
12393 | ||
12394 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12395 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12396 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12397 | present in the abstract instance but not referenced in the concrete | |
12398 | one. */ | |
216f72a1 JK |
12399 | if (child_die->tag == DW_TAG_call_site |
12400 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12401 | continue; |
12402 | ||
c38f313d DJ |
12403 | /* For each CHILD_DIE, find the corresponding child of |
12404 | ORIGIN_DIE. If there is more than one layer of | |
12405 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12406 | but GCC versions at least through 4.4 generate this (GCC PR | |
12407 | 40573). */ | |
3ea89b92 PMR |
12408 | child_origin_die = child_die; |
12409 | child_origin_cu = cu; | |
c38f313d DJ |
12410 | while (1) |
12411 | { | |
cd02d79d PA |
12412 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12413 | child_origin_cu); | |
c38f313d DJ |
12414 | if (attr == NULL) |
12415 | break; | |
cd02d79d PA |
12416 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12417 | &child_origin_cu); | |
c38f313d DJ |
12418 | } |
12419 | ||
d389af10 JK |
12420 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12421 | counterpart may exist. */ | |
c38f313d | 12422 | if (child_origin_die != child_die) |
d389af10 | 12423 | { |
edb3359d DJ |
12424 | if (child_die->tag != child_origin_die->tag |
12425 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12426 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12427 | complaint (&symfile_complaints, |
12428 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12429 | "different tags"), |
12430 | to_underlying (child_die->sect_off), | |
12431 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
12432 | if (child_origin_die->parent != origin_die) |
12433 | complaint (&symfile_complaints, | |
12434 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12435 | "different parents"), |
12436 | to_underlying (child_die->sect_off), | |
12437 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 12438 | else |
791afaa2 | 12439 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12440 | } |
d389af10 | 12441 | } |
791afaa2 TT |
12442 | std::sort (offsets.begin (), offsets.end ()); |
12443 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12444 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12445 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
12446 | complaint (&symfile_complaints, |
12447 | _("Multiple children of DIE 0x%x refer " | |
12448 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 12449 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 | 12450 | |
791afaa2 | 12451 | offsetp = offsets.data (); |
d389af10 JK |
12452 | origin_child_die = origin_die->child; |
12453 | while (origin_child_die && origin_child_die->tag) | |
12454 | { | |
12455 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12456 | while (offsetp < offsets_end |
9c541725 | 12457 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12458 | offsetp++; |
b64f50a1 | 12459 | if (offsetp >= offsets_end |
9c541725 | 12460 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12461 | { |
adde2bff DE |
12462 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12463 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12464 | This can happen with mutually referenced abstract_origins. | |
12465 | PR 16581. */ | |
12466 | if (!origin_child_die->in_process) | |
12467 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12468 | } |
12469 | origin_child_die = sibling_die (origin_child_die); | |
12470 | } | |
cd02d79d | 12471 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
12472 | } |
12473 | ||
c906108c | 12474 | static void |
e7c27a73 | 12475 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12476 | { |
e7c27a73 | 12477 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12478 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12479 | struct context_stack *newobj; |
c906108c SS |
12480 | CORE_ADDR lowpc; |
12481 | CORE_ADDR highpc; | |
12482 | struct die_info *child_die; | |
edb3359d | 12483 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12484 | const char *name; |
e142c38c | 12485 | CORE_ADDR baseaddr; |
801e3a5b | 12486 | struct block *block; |
edb3359d | 12487 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12488 | std::vector<struct symbol *> template_args; |
34eaf542 | 12489 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12490 | |
12491 | if (inlined_func) | |
12492 | { | |
12493 | /* If we do not have call site information, we can't show the | |
12494 | caller of this inlined function. That's too confusing, so | |
12495 | only use the scope for local variables. */ | |
12496 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12497 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12498 | if (call_line == NULL || call_file == NULL) | |
12499 | { | |
12500 | read_lexical_block_scope (die, cu); | |
12501 | return; | |
12502 | } | |
12503 | } | |
c906108c | 12504 | |
e142c38c DJ |
12505 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
12506 | ||
94af9270 | 12507 | name = dwarf2_name (die, cu); |
c906108c | 12508 | |
e8d05480 JB |
12509 | /* Ignore functions with missing or empty names. These are actually |
12510 | illegal according to the DWARF standard. */ | |
12511 | if (name == NULL) | |
12512 | { | |
12513 | complaint (&symfile_complaints, | |
b64f50a1 | 12514 | _("missing name for subprogram DIE at %d"), |
9c541725 | 12515 | to_underlying (die->sect_off)); |
e8d05480 JB |
12516 | return; |
12517 | } | |
12518 | ||
12519 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12520 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12521 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12522 | { |
ae4d0c03 PM |
12523 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12524 | if (!attr || !DW_UNSND (attr)) | |
12525 | complaint (&symfile_complaints, | |
3e43a32a MS |
12526 | _("cannot get low and high bounds " |
12527 | "for subprogram DIE at %d"), | |
9c541725 | 12528 | to_underlying (die->sect_off)); |
e8d05480 JB |
12529 | return; |
12530 | } | |
c906108c | 12531 | |
3e29f34a MR |
12532 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12533 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12534 | |
34eaf542 TT |
12535 | /* If we have any template arguments, then we must allocate a |
12536 | different sort of symbol. */ | |
12537 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12538 | { | |
12539 | if (child_die->tag == DW_TAG_template_type_param | |
12540 | || child_die->tag == DW_TAG_template_value_param) | |
12541 | { | |
e623cf5d | 12542 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 12543 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12544 | break; |
12545 | } | |
12546 | } | |
12547 | ||
fe978cb0 PA |
12548 | newobj = push_context (0, lowpc); |
12549 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 12550 | (struct symbol *) templ_func); |
4c2df51b | 12551 | |
4cecd739 DJ |
12552 | /* If there is a location expression for DW_AT_frame_base, record |
12553 | it. */ | |
e142c38c | 12554 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 12555 | if (attr) |
fe978cb0 | 12556 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12557 | |
63e43d3a PMR |
12558 | /* If there is a location for the static link, record it. */ |
12559 | newobj->static_link = NULL; | |
12560 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
12561 | if (attr) | |
12562 | { | |
224c3ddb SM |
12563 | newobj->static_link |
12564 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
12565 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
12566 | } | |
12567 | ||
e142c38c | 12568 | cu->list_in_scope = &local_symbols; |
c906108c | 12569 | |
639d11d3 | 12570 | if (die->child != NULL) |
c906108c | 12571 | { |
639d11d3 | 12572 | child_die = die->child; |
c906108c SS |
12573 | while (child_die && child_die->tag) |
12574 | { | |
34eaf542 TT |
12575 | if (child_die->tag == DW_TAG_template_type_param |
12576 | || child_die->tag == DW_TAG_template_value_param) | |
12577 | { | |
12578 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12579 | ||
f1078f66 | 12580 | if (arg != NULL) |
2f4732b0 | 12581 | template_args.push_back (arg); |
34eaf542 TT |
12582 | } |
12583 | else | |
12584 | process_die (child_die, cu); | |
c906108c SS |
12585 | child_die = sibling_die (child_die); |
12586 | } | |
12587 | } | |
12588 | ||
d389af10 JK |
12589 | inherit_abstract_dies (die, cu); |
12590 | ||
4a811a97 UW |
12591 | /* If we have a DW_AT_specification, we might need to import using |
12592 | directives from the context of the specification DIE. See the | |
12593 | comment in determine_prefix. */ | |
12594 | if (cu->language == language_cplus | |
12595 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12596 | { | |
12597 | struct dwarf2_cu *spec_cu = cu; | |
12598 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12599 | ||
12600 | while (spec_die) | |
12601 | { | |
12602 | child_die = spec_die->child; | |
12603 | while (child_die && child_die->tag) | |
12604 | { | |
12605 | if (child_die->tag == DW_TAG_imported_module) | |
12606 | process_die (child_die, spec_cu); | |
12607 | child_die = sibling_die (child_die); | |
12608 | } | |
12609 | ||
12610 | /* In some cases, GCC generates specification DIEs that | |
12611 | themselves contain DW_AT_specification attributes. */ | |
12612 | spec_die = die_specification (spec_die, &spec_cu); | |
12613 | } | |
12614 | } | |
12615 | ||
fe978cb0 | 12616 | newobj = pop_context (); |
c906108c | 12617 | /* Make a block for the local symbols within. */ |
fe978cb0 | 12618 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 12619 | newobj->static_link, lowpc, highpc); |
801e3a5b | 12620 | |
df8a16a1 | 12621 | /* For C++, set the block's scope. */ |
45280282 IB |
12622 | if ((cu->language == language_cplus |
12623 | || cu->language == language_fortran | |
c44af4eb TT |
12624 | || cu->language == language_d |
12625 | || cu->language == language_rust) | |
4d4ec4e5 | 12626 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12627 | block_set_scope (block, determine_prefix (die, cu), |
12628 | &objfile->objfile_obstack); | |
df8a16a1 | 12629 | |
801e3a5b JB |
12630 | /* If we have address ranges, record them. */ |
12631 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12632 | |
fe978cb0 | 12633 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 12634 | |
34eaf542 | 12635 | /* Attach template arguments to function. */ |
2f4732b0 | 12636 | if (!template_args.empty ()) |
34eaf542 TT |
12637 | { |
12638 | gdb_assert (templ_func != NULL); | |
12639 | ||
2f4732b0 | 12640 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 12641 | templ_func->template_arguments |
8d749320 SM |
12642 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
12643 | templ_func->n_template_arguments); | |
34eaf542 | 12644 | memcpy (templ_func->template_arguments, |
2f4732b0 | 12645 | template_args.data (), |
34eaf542 | 12646 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
34eaf542 TT |
12647 | } |
12648 | ||
208d8187 JB |
12649 | /* In C++, we can have functions nested inside functions (e.g., when |
12650 | a function declares a class that has methods). This means that | |
12651 | when we finish processing a function scope, we may need to go | |
12652 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 12653 | local_symbols = newobj->locals; |
22cee43f | 12654 | local_using_directives = newobj->local_using_directives; |
208d8187 | 12655 | |
921e78cf JB |
12656 | /* If we've finished processing a top-level function, subsequent |
12657 | symbols go in the file symbol list. */ | |
12658 | if (outermost_context_p ()) | |
e142c38c | 12659 | cu->list_in_scope = &file_symbols; |
c906108c SS |
12660 | } |
12661 | ||
12662 | /* Process all the DIES contained within a lexical block scope. Start | |
12663 | a new scope, process the dies, and then close the scope. */ | |
12664 | ||
12665 | static void | |
e7c27a73 | 12666 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12667 | { |
e7c27a73 | 12668 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12669 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12670 | struct context_stack *newobj; |
c906108c SS |
12671 | CORE_ADDR lowpc, highpc; |
12672 | struct die_info *child_die; | |
e142c38c DJ |
12673 | CORE_ADDR baseaddr; |
12674 | ||
12675 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
12676 | |
12677 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
12678 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
12679 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 12680 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 12681 | describe ranges. */ |
e385593e JK |
12682 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
12683 | { | |
12684 | case PC_BOUNDS_NOT_PRESENT: | |
12685 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
12686 | there was no wrapping by that DW_TAG_lexical_block. | |
12687 | GCC does no longer produces such DWARF since GCC r224161. */ | |
12688 | for (child_die = die->child; | |
12689 | child_die != NULL && child_die->tag; | |
12690 | child_die = sibling_die (child_die)) | |
12691 | process_die (child_die, cu); | |
12692 | return; | |
12693 | case PC_BOUNDS_INVALID: | |
12694 | return; | |
12695 | } | |
3e29f34a MR |
12696 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12697 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
12698 | |
12699 | push_context (0, lowpc); | |
639d11d3 | 12700 | if (die->child != NULL) |
c906108c | 12701 | { |
639d11d3 | 12702 | child_die = die->child; |
c906108c SS |
12703 | while (child_die && child_die->tag) |
12704 | { | |
e7c27a73 | 12705 | process_die (child_die, cu); |
c906108c SS |
12706 | child_die = sibling_die (child_die); |
12707 | } | |
12708 | } | |
3ea89b92 | 12709 | inherit_abstract_dies (die, cu); |
fe978cb0 | 12710 | newobj = pop_context (); |
c906108c | 12711 | |
22cee43f | 12712 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 12713 | { |
801e3a5b | 12714 | struct block *block |
63e43d3a | 12715 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 12716 | newobj->start_addr, highpc); |
801e3a5b JB |
12717 | |
12718 | /* Note that recording ranges after traversing children, as we | |
12719 | do here, means that recording a parent's ranges entails | |
12720 | walking across all its children's ranges as they appear in | |
12721 | the address map, which is quadratic behavior. | |
12722 | ||
12723 | It would be nicer to record the parent's ranges before | |
12724 | traversing its children, simply overriding whatever you find | |
12725 | there. But since we don't even decide whether to create a | |
12726 | block until after we've traversed its children, that's hard | |
12727 | to do. */ | |
12728 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 12729 | } |
fe978cb0 | 12730 | local_symbols = newobj->locals; |
22cee43f | 12731 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
12732 | } |
12733 | ||
216f72a1 | 12734 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
12735 | |
12736 | static void | |
12737 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12738 | { | |
12739 | struct objfile *objfile = cu->objfile; | |
12740 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12741 | CORE_ADDR pc, baseaddr; | |
12742 | struct attribute *attr; | |
12743 | struct call_site *call_site, call_site_local; | |
12744 | void **slot; | |
12745 | int nparams; | |
12746 | struct die_info *child_die; | |
12747 | ||
12748 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12749 | ||
216f72a1 JK |
12750 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
12751 | if (attr == NULL) | |
12752 | { | |
12753 | /* This was a pre-DWARF-5 GNU extension alias | |
12754 | for DW_AT_call_return_pc. */ | |
12755 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
12756 | } | |
96408a79 SA |
12757 | if (!attr) |
12758 | { | |
12759 | complaint (&symfile_complaints, | |
216f72a1 | 12760 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 12761 | "DIE 0x%x [in module %s]"), |
9c541725 | 12762 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12763 | return; |
12764 | } | |
31aa7e4e | 12765 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 12766 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
12767 | |
12768 | if (cu->call_site_htab == NULL) | |
12769 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
12770 | NULL, &objfile->objfile_obstack, | |
12771 | hashtab_obstack_allocate, NULL); | |
12772 | call_site_local.pc = pc; | |
12773 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
12774 | if (*slot != NULL) | |
12775 | { | |
12776 | complaint (&symfile_complaints, | |
216f72a1 | 12777 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 12778 | "DIE 0x%x [in module %s]"), |
9c541725 | 12779 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 12780 | objfile_name (objfile)); |
96408a79 SA |
12781 | return; |
12782 | } | |
12783 | ||
12784 | /* Count parameters at the caller. */ | |
12785 | ||
12786 | nparams = 0; | |
12787 | for (child_die = die->child; child_die && child_die->tag; | |
12788 | child_die = sibling_die (child_die)) | |
12789 | { | |
216f72a1 JK |
12790 | if (child_die->tag != DW_TAG_call_site_parameter |
12791 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12792 | { |
12793 | complaint (&symfile_complaints, | |
216f72a1 JK |
12794 | _("Tag %d is not DW_TAG_call_site_parameter in " |
12795 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 12796 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 12797 | objfile_name (objfile)); |
96408a79 SA |
12798 | continue; |
12799 | } | |
12800 | ||
12801 | nparams++; | |
12802 | } | |
12803 | ||
224c3ddb SM |
12804 | call_site |
12805 | = ((struct call_site *) | |
12806 | obstack_alloc (&objfile->objfile_obstack, | |
12807 | sizeof (*call_site) | |
12808 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
12809 | *slot = call_site; |
12810 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
12811 | call_site->pc = pc; | |
12812 | ||
216f72a1 JK |
12813 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
12814 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
12815 | { |
12816 | struct die_info *func_die; | |
12817 | ||
12818 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
12819 | for (func_die = die->parent; | |
12820 | func_die && func_die->tag != DW_TAG_subprogram | |
12821 | && func_die->tag != DW_TAG_subroutine_type; | |
12822 | func_die = func_die->parent); | |
12823 | ||
216f72a1 JK |
12824 | /* DW_AT_call_all_calls is a superset |
12825 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 12826 | if (func_die |
216f72a1 | 12827 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 12828 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 12829 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
12830 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
12831 | { | |
12832 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
12833 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
12834 | both the initial caller containing the real return address PC and | |
12835 | the final callee containing the current PC of a chain of tail | |
12836 | calls do not need to have the tail call list complete. But any | |
12837 | function candidate for a virtual tail call frame searched via | |
12838 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
12839 | determined unambiguously. */ | |
12840 | } | |
12841 | else | |
12842 | { | |
12843 | struct type *func_type = NULL; | |
12844 | ||
12845 | if (func_die) | |
12846 | func_type = get_die_type (func_die, cu); | |
12847 | if (func_type != NULL) | |
12848 | { | |
12849 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
12850 | ||
12851 | /* Enlist this call site to the function. */ | |
12852 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
12853 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
12854 | } | |
12855 | else | |
12856 | complaint (&symfile_complaints, | |
216f72a1 | 12857 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 12858 | "DIE 0x%x [in module %s]"), |
9c541725 | 12859 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12860 | } |
12861 | } | |
12862 | ||
216f72a1 JK |
12863 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
12864 | if (attr == NULL) | |
12865 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
12866 | if (attr == NULL) | |
12867 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 12868 | if (attr == NULL) |
216f72a1 JK |
12869 | { |
12870 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
12871 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12872 | } | |
96408a79 SA |
12873 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12874 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12875 | /* Keep NULL DWARF_BLOCK. */; | |
12876 | else if (attr_form_is_block (attr)) | |
12877 | { | |
12878 | struct dwarf2_locexpr_baton *dlbaton; | |
12879 | ||
8d749320 | 12880 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12881 | dlbaton->data = DW_BLOCK (attr)->data; |
12882 | dlbaton->size = DW_BLOCK (attr)->size; | |
12883 | dlbaton->per_cu = cu->per_cu; | |
12884 | ||
12885 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12886 | } | |
7771576e | 12887 | else if (attr_form_is_ref (attr)) |
96408a79 | 12888 | { |
96408a79 SA |
12889 | struct dwarf2_cu *target_cu = cu; |
12890 | struct die_info *target_die; | |
12891 | ||
ac9ec31b | 12892 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12893 | gdb_assert (target_cu->objfile == objfile); |
12894 | if (die_is_declaration (target_die, target_cu)) | |
12895 | { | |
7d45c7c3 | 12896 | const char *target_physname; |
9112db09 JK |
12897 | |
12898 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12899 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12900 | if (target_physname == NULL) |
9112db09 | 12901 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12902 | if (target_physname == NULL) |
12903 | complaint (&symfile_complaints, | |
216f72a1 | 12904 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12905 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12906 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12907 | else |
7d455152 | 12908 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12909 | } |
12910 | else | |
12911 | { | |
12912 | CORE_ADDR lowpc; | |
12913 | ||
12914 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12915 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12916 | <= PC_BOUNDS_INVALID) |
96408a79 | 12917 | complaint (&symfile_complaints, |
216f72a1 | 12918 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12919 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12920 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12921 | else |
3e29f34a MR |
12922 | { |
12923 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12924 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12925 | } | |
96408a79 SA |
12926 | } |
12927 | } | |
12928 | else | |
12929 | complaint (&symfile_complaints, | |
216f72a1 | 12930 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12931 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12932 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12933 | |
12934 | call_site->per_cu = cu->per_cu; | |
12935 | ||
12936 | for (child_die = die->child; | |
12937 | child_die && child_die->tag; | |
12938 | child_die = sibling_die (child_die)) | |
12939 | { | |
96408a79 | 12940 | struct call_site_parameter *parameter; |
1788b2d3 | 12941 | struct attribute *loc, *origin; |
96408a79 | 12942 | |
216f72a1 JK |
12943 | if (child_die->tag != DW_TAG_call_site_parameter |
12944 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12945 | { |
12946 | /* Already printed the complaint above. */ | |
12947 | continue; | |
12948 | } | |
12949 | ||
12950 | gdb_assert (call_site->parameter_count < nparams); | |
12951 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12952 | ||
1788b2d3 JK |
12953 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12954 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12955 | register is contained in DW_AT_call_value. */ |
96408a79 | 12956 | |
24c5c679 | 12957 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12958 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12959 | if (origin == NULL) | |
12960 | { | |
12961 | /* This was a pre-DWARF-5 GNU extension alias | |
12962 | for DW_AT_call_parameter. */ | |
12963 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12964 | } | |
7771576e | 12965 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12966 | { |
1788b2d3 | 12967 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12968 | |
12969 | sect_offset sect_off | |
12970 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12971 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12972 | { |
12973 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12974 | binding can be done only inside one CU. Such referenced DIE | |
12975 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12976 | complaint (&symfile_complaints, | |
216f72a1 JK |
12977 | _("DW_AT_call_parameter offset is not in CU for " |
12978 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12979 | to_underlying (child_die->sect_off), |
12980 | objfile_name (objfile)); | |
d76b7dbc JK |
12981 | continue; |
12982 | } | |
9c541725 PA |
12983 | parameter->u.param_cu_off |
12984 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12985 | } |
12986 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12987 | { |
12988 | complaint (&symfile_complaints, | |
12989 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12990 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12991 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12992 | continue; |
12993 | } | |
24c5c679 | 12994 | else |
96408a79 | 12995 | { |
24c5c679 JK |
12996 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12997 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12998 | if (parameter->u.dwarf_reg != -1) | |
12999 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
13000 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
13001 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
13002 | ¶meter->u.fb_offset)) | |
13003 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
13004 | else | |
13005 | { | |
13006 | complaint (&symfile_complaints, | |
13007 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
13008 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 13009 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 13010 | "[in module %s]"), |
9c541725 PA |
13011 | to_underlying (child_die->sect_off), |
13012 | objfile_name (objfile)); | |
24c5c679 JK |
13013 | continue; |
13014 | } | |
96408a79 SA |
13015 | } |
13016 | ||
216f72a1 JK |
13017 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13018 | if (attr == NULL) | |
13019 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
13020 | if (!attr_form_is_block (attr)) |
13021 | { | |
13022 | complaint (&symfile_complaints, | |
216f72a1 JK |
13023 | _("No DW_FORM_block* DW_AT_call_value for " |
13024 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
13025 | to_underlying (child_die->sect_off), |
13026 | objfile_name (objfile)); | |
96408a79 SA |
13027 | continue; |
13028 | } | |
13029 | parameter->value = DW_BLOCK (attr)->data; | |
13030 | parameter->value_size = DW_BLOCK (attr)->size; | |
13031 | ||
13032 | /* Parameters are not pre-cleared by memset above. */ | |
13033 | parameter->data_value = NULL; | |
13034 | parameter->data_value_size = 0; | |
13035 | call_site->parameter_count++; | |
13036 | ||
216f72a1 JK |
13037 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13038 | if (attr == NULL) | |
13039 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
13040 | if (attr) |
13041 | { | |
13042 | if (!attr_form_is_block (attr)) | |
13043 | complaint (&symfile_complaints, | |
216f72a1 JK |
13044 | _("No DW_FORM_block* DW_AT_call_data_value for " |
13045 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
13046 | to_underlying (child_die->sect_off), |
13047 | objfile_name (objfile)); | |
96408a79 SA |
13048 | else |
13049 | { | |
13050 | parameter->data_value = DW_BLOCK (attr)->data; | |
13051 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
13052 | } | |
13053 | } | |
13054 | } | |
13055 | } | |
13056 | ||
71a3c369 TT |
13057 | /* Helper function for read_variable. If DIE represents a virtual |
13058 | table, then return the type of the concrete object that is | |
13059 | associated with the virtual table. Otherwise, return NULL. */ | |
13060 | ||
13061 | static struct type * | |
13062 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13063 | { | |
13064 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13065 | if (attr == NULL) | |
13066 | return NULL; | |
13067 | ||
13068 | /* Find the type DIE. */ | |
13069 | struct die_info *type_die = NULL; | |
13070 | struct dwarf2_cu *type_cu = cu; | |
13071 | ||
13072 | if (attr_form_is_ref (attr)) | |
13073 | type_die = follow_die_ref (die, attr, &type_cu); | |
13074 | if (type_die == NULL) | |
13075 | return NULL; | |
13076 | ||
13077 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13078 | return NULL; | |
13079 | return die_containing_type (type_die, type_cu); | |
13080 | } | |
13081 | ||
13082 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13083 | ||
13084 | static void | |
13085 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13086 | { | |
13087 | struct rust_vtable_symbol *storage = NULL; | |
13088 | ||
13089 | if (cu->language == language_rust) | |
13090 | { | |
13091 | struct type *containing_type = rust_containing_type (die, cu); | |
13092 | ||
13093 | if (containing_type != NULL) | |
13094 | { | |
13095 | struct objfile *objfile = cu->objfile; | |
13096 | ||
13097 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
13098 | struct rust_vtable_symbol); | |
13099 | initialize_objfile_symbol (storage); | |
13100 | storage->concrete_type = containing_type; | |
cf724bc9 | 13101 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13102 | } |
13103 | } | |
13104 | ||
13105 | new_symbol_full (die, NULL, cu, storage); | |
13106 | } | |
13107 | ||
43988095 JK |
13108 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13109 | reading .debug_rnglists. | |
13110 | Callback's type should be: | |
13111 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13112 | Return true if the attributes are present and valid, otherwise, | |
13113 | return false. */ | |
13114 | ||
13115 | template <typename Callback> | |
13116 | static bool | |
13117 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
13118 | Callback &&callback) | |
13119 | { | |
13120 | struct objfile *objfile = cu->objfile; | |
13121 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13122 | struct comp_unit_head *cu_header = &cu->header; | |
13123 | bfd *obfd = objfile->obfd; | |
13124 | unsigned int addr_size = cu_header->addr_size; | |
13125 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13126 | /* Base address selection entry. */ | |
13127 | CORE_ADDR base; | |
13128 | int found_base; | |
13129 | unsigned int dummy; | |
13130 | const gdb_byte *buffer; | |
13131 | CORE_ADDR low = 0; | |
13132 | CORE_ADDR high = 0; | |
13133 | CORE_ADDR baseaddr; | |
13134 | bool overflow = false; | |
13135 | ||
13136 | found_base = cu->base_known; | |
13137 | base = cu->base_address; | |
13138 | ||
13139 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
13140 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
13141 | { | |
13142 | complaint (&symfile_complaints, | |
13143 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
13144 | offset); | |
13145 | return false; | |
13146 | } | |
13147 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
13148 | ||
13149 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
13150 | ||
13151 | while (1) | |
13152 | { | |
7814882a JK |
13153 | /* Initialize it due to a false compiler warning. */ |
13154 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
13155 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
13156 | + dwarf2_per_objfile->rnglists.size); | |
13157 | unsigned int bytes_read; | |
13158 | ||
13159 | if (buffer == buf_end) | |
13160 | { | |
13161 | overflow = true; | |
13162 | break; | |
13163 | } | |
13164 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13165 | switch (rlet) | |
13166 | { | |
13167 | case DW_RLE_end_of_list: | |
13168 | break; | |
13169 | case DW_RLE_base_address: | |
13170 | if (buffer + cu->header.addr_size > buf_end) | |
13171 | { | |
13172 | overflow = true; | |
13173 | break; | |
13174 | } | |
13175 | base = read_address (obfd, buffer, cu, &bytes_read); | |
13176 | found_base = 1; | |
13177 | buffer += bytes_read; | |
13178 | break; | |
13179 | case DW_RLE_start_length: | |
13180 | if (buffer + cu->header.addr_size > buf_end) | |
13181 | { | |
13182 | overflow = true; | |
13183 | break; | |
13184 | } | |
13185 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
13186 | buffer += bytes_read; | |
13187 | range_end = (range_beginning | |
13188 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13189 | buffer += bytes_read; | |
13190 | if (buffer > buf_end) | |
13191 | { | |
13192 | overflow = true; | |
13193 | break; | |
13194 | } | |
13195 | break; | |
13196 | case DW_RLE_offset_pair: | |
13197 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13198 | buffer += bytes_read; | |
13199 | if (buffer > buf_end) | |
13200 | { | |
13201 | overflow = true; | |
13202 | break; | |
13203 | } | |
13204 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13205 | buffer += bytes_read; | |
13206 | if (buffer > buf_end) | |
13207 | { | |
13208 | overflow = true; | |
13209 | break; | |
13210 | } | |
13211 | break; | |
13212 | case DW_RLE_start_end: | |
13213 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13214 | { | |
13215 | overflow = true; | |
13216 | break; | |
13217 | } | |
13218 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
13219 | buffer += bytes_read; | |
13220 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
13221 | buffer += bytes_read; | |
13222 | break; | |
13223 | default: | |
13224 | complaint (&symfile_complaints, | |
13225 | _("Invalid .debug_rnglists data (no base address)")); | |
13226 | return false; | |
13227 | } | |
13228 | if (rlet == DW_RLE_end_of_list || overflow) | |
13229 | break; | |
13230 | if (rlet == DW_RLE_base_address) | |
13231 | continue; | |
13232 | ||
13233 | if (!found_base) | |
13234 | { | |
13235 | /* We have no valid base address for the ranges | |
13236 | data. */ | |
13237 | complaint (&symfile_complaints, | |
13238 | _("Invalid .debug_rnglists data (no base address)")); | |
13239 | return false; | |
13240 | } | |
13241 | ||
13242 | if (range_beginning > range_end) | |
13243 | { | |
13244 | /* Inverted range entries are invalid. */ | |
13245 | complaint (&symfile_complaints, | |
13246 | _("Invalid .debug_rnglists data (inverted range)")); | |
13247 | return false; | |
13248 | } | |
13249 | ||
13250 | /* Empty range entries have no effect. */ | |
13251 | if (range_beginning == range_end) | |
13252 | continue; | |
13253 | ||
13254 | range_beginning += base; | |
13255 | range_end += base; | |
13256 | ||
13257 | /* A not-uncommon case of bad debug info. | |
13258 | Don't pollute the addrmap with bad data. */ | |
13259 | if (range_beginning + baseaddr == 0 | |
13260 | && !dwarf2_per_objfile->has_section_at_zero) | |
13261 | { | |
13262 | complaint (&symfile_complaints, | |
13263 | _(".debug_rnglists entry has start address of zero" | |
13264 | " [in module %s]"), objfile_name (objfile)); | |
13265 | continue; | |
13266 | } | |
13267 | ||
13268 | callback (range_beginning, range_end); | |
13269 | } | |
13270 | ||
13271 | if (overflow) | |
13272 | { | |
13273 | complaint (&symfile_complaints, | |
13274 | _("Offset %d is not terminated " | |
13275 | "for DW_AT_ranges attribute"), | |
13276 | offset); | |
13277 | return false; | |
13278 | } | |
13279 | ||
13280 | return true; | |
13281 | } | |
13282 | ||
13283 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13284 | Callback's type should be: | |
13285 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13286 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13287 | |
43988095 | 13288 | template <typename Callback> |
43039443 | 13289 | static int |
5f46c5a5 | 13290 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 13291 | Callback &&callback) |
43039443 JK |
13292 | { |
13293 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 13294 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
13295 | struct comp_unit_head *cu_header = &cu->header; |
13296 | bfd *obfd = objfile->obfd; | |
13297 | unsigned int addr_size = cu_header->addr_size; | |
13298 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13299 | /* Base address selection entry. */ | |
13300 | CORE_ADDR base; | |
13301 | int found_base; | |
13302 | unsigned int dummy; | |
d521ce57 | 13303 | const gdb_byte *buffer; |
ff013f42 | 13304 | CORE_ADDR baseaddr; |
43039443 | 13305 | |
43988095 JK |
13306 | if (cu_header->version >= 5) |
13307 | return dwarf2_rnglists_process (offset, cu, callback); | |
13308 | ||
d00adf39 DE |
13309 | found_base = cu->base_known; |
13310 | base = cu->base_address; | |
43039443 | 13311 | |
be391dca | 13312 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 13313 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
13314 | { |
13315 | complaint (&symfile_complaints, | |
13316 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
13317 | offset); | |
13318 | return 0; | |
13319 | } | |
dce234bc | 13320 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 13321 | |
e7030f15 | 13322 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 13323 | |
43039443 JK |
13324 | while (1) |
13325 | { | |
13326 | CORE_ADDR range_beginning, range_end; | |
13327 | ||
13328 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
13329 | buffer += addr_size; | |
13330 | range_end = read_address (obfd, buffer, cu, &dummy); | |
13331 | buffer += addr_size; | |
13332 | offset += 2 * addr_size; | |
13333 | ||
13334 | /* An end of list marker is a pair of zero addresses. */ | |
13335 | if (range_beginning == 0 && range_end == 0) | |
13336 | /* Found the end of list entry. */ | |
13337 | break; | |
13338 | ||
13339 | /* Each base address selection entry is a pair of 2 values. | |
13340 | The first is the largest possible address, the second is | |
13341 | the base address. Check for a base address here. */ | |
13342 | if ((range_beginning & mask) == mask) | |
13343 | { | |
28d2bfb9 AB |
13344 | /* If we found the largest possible address, then we already |
13345 | have the base address in range_end. */ | |
13346 | base = range_end; | |
43039443 JK |
13347 | found_base = 1; |
13348 | continue; | |
13349 | } | |
13350 | ||
13351 | if (!found_base) | |
13352 | { | |
13353 | /* We have no valid base address for the ranges | |
13354 | data. */ | |
13355 | complaint (&symfile_complaints, | |
13356 | _("Invalid .debug_ranges data (no base address)")); | |
13357 | return 0; | |
13358 | } | |
13359 | ||
9277c30c UW |
13360 | if (range_beginning > range_end) |
13361 | { | |
13362 | /* Inverted range entries are invalid. */ | |
13363 | complaint (&symfile_complaints, | |
13364 | _("Invalid .debug_ranges data (inverted range)")); | |
13365 | return 0; | |
13366 | } | |
13367 | ||
13368 | /* Empty range entries have no effect. */ | |
13369 | if (range_beginning == range_end) | |
13370 | continue; | |
13371 | ||
43039443 JK |
13372 | range_beginning += base; |
13373 | range_end += base; | |
13374 | ||
01093045 DE |
13375 | /* A not-uncommon case of bad debug info. |
13376 | Don't pollute the addrmap with bad data. */ | |
13377 | if (range_beginning + baseaddr == 0 | |
13378 | && !dwarf2_per_objfile->has_section_at_zero) | |
13379 | { | |
13380 | complaint (&symfile_complaints, | |
13381 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 13382 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13383 | continue; |
13384 | } | |
13385 | ||
5f46c5a5 JK |
13386 | callback (range_beginning, range_end); |
13387 | } | |
13388 | ||
13389 | return 1; | |
13390 | } | |
13391 | ||
13392 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13393 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13394 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13395 | ||
13396 | static int | |
13397 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13398 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
13399 | struct partial_symtab *ranges_pst) | |
13400 | { | |
13401 | struct objfile *objfile = cu->objfile; | |
13402 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13403 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
13404 | SECT_OFF_TEXT (objfile)); | |
13405 | int low_set = 0; | |
13406 | CORE_ADDR low = 0; | |
13407 | CORE_ADDR high = 0; | |
13408 | int retval; | |
13409 | ||
13410 | retval = dwarf2_ranges_process (offset, cu, | |
13411 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13412 | { | |
9277c30c | 13413 | if (ranges_pst != NULL) |
3e29f34a MR |
13414 | { |
13415 | CORE_ADDR lowpc; | |
13416 | CORE_ADDR highpc; | |
13417 | ||
13418 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13419 | range_beginning + baseaddr); | |
13420 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13421 | range_end + baseaddr); | |
13422 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
13423 | ranges_pst); | |
13424 | } | |
ff013f42 | 13425 | |
43039443 JK |
13426 | /* FIXME: This is recording everything as a low-high |
13427 | segment of consecutive addresses. We should have a | |
13428 | data structure for discontiguous block ranges | |
13429 | instead. */ | |
13430 | if (! low_set) | |
13431 | { | |
13432 | low = range_beginning; | |
13433 | high = range_end; | |
13434 | low_set = 1; | |
13435 | } | |
13436 | else | |
13437 | { | |
13438 | if (range_beginning < low) | |
13439 | low = range_beginning; | |
13440 | if (range_end > high) | |
13441 | high = range_end; | |
13442 | } | |
5f46c5a5 JK |
13443 | }); |
13444 | if (!retval) | |
13445 | return 0; | |
43039443 JK |
13446 | |
13447 | if (! low_set) | |
13448 | /* If the first entry is an end-of-list marker, the range | |
13449 | describes an empty scope, i.e. no instructions. */ | |
13450 | return 0; | |
13451 | ||
13452 | if (low_return) | |
13453 | *low_return = low; | |
13454 | if (high_return) | |
13455 | *high_return = high; | |
13456 | return 1; | |
13457 | } | |
13458 | ||
3a2b436a JK |
13459 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13460 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13461 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13462 | |
3a2b436a | 13463 | static enum pc_bounds_kind |
af34e669 | 13464 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
13465 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
13466 | struct partial_symtab *pst) | |
c906108c SS |
13467 | { |
13468 | struct attribute *attr; | |
91da1414 | 13469 | struct attribute *attr_high; |
af34e669 DJ |
13470 | CORE_ADDR low = 0; |
13471 | CORE_ADDR high = 0; | |
e385593e | 13472 | enum pc_bounds_kind ret; |
c906108c | 13473 | |
91da1414 MW |
13474 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13475 | if (attr_high) | |
af34e669 | 13476 | { |
e142c38c | 13477 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 13478 | if (attr) |
91da1414 | 13479 | { |
31aa7e4e JB |
13480 | low = attr_value_as_address (attr); |
13481 | high = attr_value_as_address (attr_high); | |
13482 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13483 | high += low; | |
91da1414 | 13484 | } |
af34e669 DJ |
13485 | else |
13486 | /* Found high w/o low attribute. */ | |
e385593e | 13487 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13488 | |
13489 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13490 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13491 | } |
c906108c | 13492 | else |
af34e669 | 13493 | { |
e142c38c | 13494 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13495 | if (attr != NULL) |
13496 | { | |
ab435259 DE |
13497 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13498 | We take advantage of the fact that DW_AT_ranges does not appear | |
13499 | in DW_TAG_compile_unit of DWO files. */ | |
13500 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13501 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13502 | + (need_ranges_base | |
13503 | ? cu->ranges_base | |
13504 | : 0)); | |
2e3cf129 | 13505 | |
af34e669 | 13506 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13507 | .debug_ranges section. */ |
2e3cf129 | 13508 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13509 | return PC_BOUNDS_INVALID; |
43039443 | 13510 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13511 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13512 | } |
e385593e JK |
13513 | else |
13514 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13515 | } |
c906108c | 13516 | |
9373cf26 JK |
13517 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
13518 | if (high <= low) | |
e385593e | 13519 | return PC_BOUNDS_INVALID; |
c906108c SS |
13520 | |
13521 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13522 | eliminate duplicate copies of functions and vtables and such. | |
13523 | The linker will arbitrarily choose one and discard the others. | |
13524 | The AT_*_pc values for such functions refer to local labels in | |
13525 | these sections. If the section from that file was discarded, the | |
13526 | labels are not in the output, so the relocs get a value of 0. | |
13527 | If this is a discarded function, mark the pc bounds as invalid, | |
13528 | so that GDB will ignore it. */ | |
72dca2f5 | 13529 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13530 | return PC_BOUNDS_INVALID; |
c906108c SS |
13531 | |
13532 | *lowpc = low; | |
96408a79 SA |
13533 | if (highpc) |
13534 | *highpc = high; | |
af34e669 | 13535 | return ret; |
c906108c SS |
13536 | } |
13537 | ||
b084d499 JB |
13538 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13539 | its low and high PC addresses. Do nothing if these addresses could not | |
13540 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13541 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13542 | ||
13543 | static void | |
13544 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13545 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13546 | struct dwarf2_cu *cu) | |
13547 | { | |
13548 | CORE_ADDR low, high; | |
13549 | struct die_info *child = die->child; | |
13550 | ||
e385593e | 13551 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13552 | { |
325fac50 PA |
13553 | *lowpc = std::min (*lowpc, low); |
13554 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13555 | } |
13556 | ||
13557 | /* If the language does not allow nested subprograms (either inside | |
13558 | subprograms or lexical blocks), we're done. */ | |
13559 | if (cu->language != language_ada) | |
13560 | return; | |
6e70227d | 13561 | |
b084d499 JB |
13562 | /* Check all the children of the given DIE. If it contains nested |
13563 | subprograms, then check their pc bounds. Likewise, we need to | |
13564 | check lexical blocks as well, as they may also contain subprogram | |
13565 | definitions. */ | |
13566 | while (child && child->tag) | |
13567 | { | |
13568 | if (child->tag == DW_TAG_subprogram | |
13569 | || child->tag == DW_TAG_lexical_block) | |
13570 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13571 | child = sibling_die (child); | |
13572 | } | |
13573 | } | |
13574 | ||
fae299cd DC |
13575 | /* Get the low and high pc's represented by the scope DIE, and store |
13576 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13577 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13578 | ||
13579 | static void | |
13580 | get_scope_pc_bounds (struct die_info *die, | |
13581 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13582 | struct dwarf2_cu *cu) | |
13583 | { | |
13584 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13585 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13586 | CORE_ADDR current_low, current_high; | |
13587 | ||
3a2b436a | 13588 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13589 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13590 | { |
13591 | best_low = current_low; | |
13592 | best_high = current_high; | |
13593 | } | |
13594 | else | |
13595 | { | |
13596 | struct die_info *child = die->child; | |
13597 | ||
13598 | while (child && child->tag) | |
13599 | { | |
13600 | switch (child->tag) { | |
13601 | case DW_TAG_subprogram: | |
b084d499 | 13602 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13603 | break; |
13604 | case DW_TAG_namespace: | |
f55ee35c | 13605 | case DW_TAG_module: |
fae299cd DC |
13606 | /* FIXME: carlton/2004-01-16: Should we do this for |
13607 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13608 | that current GCC's always emit the DIEs corresponding | |
13609 | to definitions of methods of classes as children of a | |
13610 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13611 | the DIEs giving the declarations, which could be | |
13612 | anywhere). But I don't see any reason why the | |
13613 | standards says that they have to be there. */ | |
13614 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13615 | ||
13616 | if (current_low != ((CORE_ADDR) -1)) | |
13617 | { | |
325fac50 PA |
13618 | best_low = std::min (best_low, current_low); |
13619 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13620 | } |
13621 | break; | |
13622 | default: | |
0963b4bd | 13623 | /* Ignore. */ |
fae299cd DC |
13624 | break; |
13625 | } | |
13626 | ||
13627 | child = sibling_die (child); | |
13628 | } | |
13629 | } | |
13630 | ||
13631 | *lowpc = best_low; | |
13632 | *highpc = best_high; | |
13633 | } | |
13634 | ||
801e3a5b JB |
13635 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13636 | in DIE. */ | |
380bca97 | 13637 | |
801e3a5b JB |
13638 | static void |
13639 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
13640 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
13641 | { | |
bb5ed363 | 13642 | struct objfile *objfile = cu->objfile; |
3e29f34a | 13643 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 13644 | struct attribute *attr; |
91da1414 | 13645 | struct attribute *attr_high; |
801e3a5b | 13646 | |
91da1414 MW |
13647 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13648 | if (attr_high) | |
801e3a5b | 13649 | { |
801e3a5b JB |
13650 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
13651 | if (attr) | |
13652 | { | |
31aa7e4e JB |
13653 | CORE_ADDR low = attr_value_as_address (attr); |
13654 | CORE_ADDR high = attr_value_as_address (attr_high); | |
13655 | ||
13656 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13657 | high += low; | |
9a619af0 | 13658 | |
3e29f34a MR |
13659 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
13660 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
13661 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
13662 | } |
13663 | } | |
13664 | ||
13665 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
13666 | if (attr) | |
13667 | { | |
bb5ed363 | 13668 | bfd *obfd = objfile->obfd; |
ab435259 DE |
13669 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13670 | We take advantage of the fact that DW_AT_ranges does not appear | |
13671 | in DW_TAG_compile_unit of DWO files. */ | |
13672 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
13673 | |
13674 | /* The value of the DW_AT_ranges attribute is the offset of the | |
13675 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
13676 | unsigned long offset = (DW_UNSND (attr) |
13677 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 13678 | const gdb_byte *buffer; |
801e3a5b JB |
13679 | |
13680 | /* For some target architectures, but not others, the | |
13681 | read_address function sign-extends the addresses it returns. | |
13682 | To recognize base address selection entries, we need a | |
13683 | mask. */ | |
13684 | unsigned int addr_size = cu->header.addr_size; | |
13685 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13686 | ||
13687 | /* The base address, to which the next pair is relative. Note | |
13688 | that this 'base' is a DWARF concept: most entries in a range | |
13689 | list are relative, to reduce the number of relocs against the | |
13690 | debugging information. This is separate from this function's | |
13691 | 'baseaddr' argument, which GDB uses to relocate debugging | |
13692 | information from a shared library based on the address at | |
13693 | which the library was loaded. */ | |
d00adf39 DE |
13694 | CORE_ADDR base = cu->base_address; |
13695 | int base_known = cu->base_known; | |
801e3a5b | 13696 | |
5f46c5a5 JK |
13697 | dwarf2_ranges_process (offset, cu, |
13698 | [&] (CORE_ADDR start, CORE_ADDR end) | |
13699 | { | |
58fdfd2c JK |
13700 | start += baseaddr; |
13701 | end += baseaddr; | |
5f46c5a5 JK |
13702 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
13703 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
13704 | record_block_range (block, start, end - 1); | |
13705 | }); | |
801e3a5b JB |
13706 | } |
13707 | } | |
13708 | ||
685b1105 JK |
13709 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
13710 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 13711 | |
685b1105 JK |
13712 | static void |
13713 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 13714 | { |
38360086 | 13715 | int major, minor; |
60d5a603 JK |
13716 | |
13717 | if (cu->producer == NULL) | |
13718 | { | |
13719 | /* For unknown compilers expect their behavior is DWARF version | |
13720 | compliant. | |
13721 | ||
13722 | GCC started to support .debug_types sections by -gdwarf-4 since | |
13723 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
13724 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
13725 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
13726 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 13727 | } |
b1ffba5a | 13728 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 13729 | { |
38360086 MW |
13730 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
13731 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 13732 | } |
5230b05a WT |
13733 | else if (producer_is_icc (cu->producer, &major, &minor)) |
13734 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
13735 | else |
13736 | { | |
13737 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
13738 | compliant. */ | |
60d5a603 JK |
13739 | } |
13740 | ||
ba919b58 | 13741 | cu->checked_producer = 1; |
685b1105 | 13742 | } |
ba919b58 | 13743 | |
685b1105 JK |
13744 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
13745 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
13746 | during 4.6.0 experimental. */ | |
13747 | ||
13748 | static int | |
13749 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
13750 | { | |
13751 | if (!cu->checked_producer) | |
13752 | check_producer (cu); | |
13753 | ||
13754 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
13755 | } |
13756 | ||
13757 | /* Return the default accessibility type if it is not overriden by | |
13758 | DW_AT_accessibility. */ | |
13759 | ||
13760 | static enum dwarf_access_attribute | |
13761 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
13762 | { | |
13763 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
13764 | { | |
13765 | /* The default DWARF 2 accessibility for members is public, the default | |
13766 | accessibility for inheritance is private. */ | |
13767 | ||
13768 | if (die->tag != DW_TAG_inheritance) | |
13769 | return DW_ACCESS_public; | |
13770 | else | |
13771 | return DW_ACCESS_private; | |
13772 | } | |
13773 | else | |
13774 | { | |
13775 | /* DWARF 3+ defines the default accessibility a different way. The same | |
13776 | rules apply now for DW_TAG_inheritance as for the members and it only | |
13777 | depends on the container kind. */ | |
13778 | ||
13779 | if (die->parent->tag == DW_TAG_class_type) | |
13780 | return DW_ACCESS_private; | |
13781 | else | |
13782 | return DW_ACCESS_public; | |
13783 | } | |
13784 | } | |
13785 | ||
74ac6d43 TT |
13786 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
13787 | offset. If the attribute was not found return 0, otherwise return | |
13788 | 1. If it was found but could not properly be handled, set *OFFSET | |
13789 | to 0. */ | |
13790 | ||
13791 | static int | |
13792 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
13793 | LONGEST *offset) | |
13794 | { | |
13795 | struct attribute *attr; | |
13796 | ||
13797 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
13798 | if (attr != NULL) | |
13799 | { | |
13800 | *offset = 0; | |
13801 | ||
13802 | /* Note that we do not check for a section offset first here. | |
13803 | This is because DW_AT_data_member_location is new in DWARF 4, | |
13804 | so if we see it, we can assume that a constant form is really | |
13805 | a constant and not a section offset. */ | |
13806 | if (attr_form_is_constant (attr)) | |
13807 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
13808 | else if (attr_form_is_section_offset (attr)) | |
13809 | dwarf2_complex_location_expr_complaint (); | |
13810 | else if (attr_form_is_block (attr)) | |
13811 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
13812 | else | |
13813 | dwarf2_complex_location_expr_complaint (); | |
13814 | ||
13815 | return 1; | |
13816 | } | |
13817 | ||
13818 | return 0; | |
13819 | } | |
13820 | ||
c906108c SS |
13821 | /* Add an aggregate field to the field list. */ |
13822 | ||
13823 | static void | |
107d2387 | 13824 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13825 | struct dwarf2_cu *cu) |
6e70227d | 13826 | { |
e7c27a73 | 13827 | struct objfile *objfile = cu->objfile; |
5e2b427d | 13828 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13829 | struct nextfield *new_field; |
13830 | struct attribute *attr; | |
13831 | struct field *fp; | |
15d034d0 | 13832 | const char *fieldname = ""; |
c906108c SS |
13833 | |
13834 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13835 | new_field = XNEW (struct nextfield); |
b8c9b27d | 13836 | make_cleanup (xfree, new_field); |
c906108c | 13837 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
13838 | |
13839 | if (die->tag == DW_TAG_inheritance) | |
13840 | { | |
13841 | new_field->next = fip->baseclasses; | |
13842 | fip->baseclasses = new_field; | |
13843 | } | |
13844 | else | |
13845 | { | |
13846 | new_field->next = fip->fields; | |
13847 | fip->fields = new_field; | |
13848 | } | |
c906108c SS |
13849 | fip->nfields++; |
13850 | ||
e142c38c | 13851 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
13852 | if (attr) |
13853 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
13854 | else |
13855 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
13856 | if (new_field->accessibility != DW_ACCESS_public) |
13857 | fip->non_public_fields = 1; | |
60d5a603 | 13858 | |
e142c38c | 13859 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
13860 | if (attr) |
13861 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
13862 | else |
13863 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
13864 | |
13865 | fp = &new_field->field; | |
a9a9bd0f | 13866 | |
e142c38c | 13867 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 13868 | { |
74ac6d43 TT |
13869 | LONGEST offset; |
13870 | ||
a9a9bd0f | 13871 | /* Data member other than a C++ static data member. */ |
6e70227d | 13872 | |
c906108c | 13873 | /* Get type of field. */ |
e7c27a73 | 13874 | fp->type = die_type (die, cu); |
c906108c | 13875 | |
d6a843b5 | 13876 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 13877 | |
c906108c | 13878 | /* Get bit size of field (zero if none). */ |
e142c38c | 13879 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
13880 | if (attr) |
13881 | { | |
13882 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
13883 | } | |
13884 | else | |
13885 | { | |
13886 | FIELD_BITSIZE (*fp) = 0; | |
13887 | } | |
13888 | ||
13889 | /* Get bit offset of field. */ | |
74ac6d43 TT |
13890 | if (handle_data_member_location (die, cu, &offset)) |
13891 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 13892 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
13893 | if (attr) |
13894 | { | |
5e2b427d | 13895 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
13896 | { |
13897 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
13898 | additional bit offset from the MSB of the containing |
13899 | anonymous object to the MSB of the field. We don't | |
13900 | have to do anything special since we don't need to | |
13901 | know the size of the anonymous object. */ | |
f41f5e61 | 13902 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
13903 | } |
13904 | else | |
13905 | { | |
13906 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
13907 | MSB of the anonymous object, subtract off the number of |
13908 | bits from the MSB of the field to the MSB of the | |
13909 | object, and then subtract off the number of bits of | |
13910 | the field itself. The result is the bit offset of | |
13911 | the LSB of the field. */ | |
c906108c SS |
13912 | int anonymous_size; |
13913 | int bit_offset = DW_UNSND (attr); | |
13914 | ||
e142c38c | 13915 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13916 | if (attr) |
13917 | { | |
13918 | /* The size of the anonymous object containing | |
13919 | the bit field is explicit, so use the | |
13920 | indicated size (in bytes). */ | |
13921 | anonymous_size = DW_UNSND (attr); | |
13922 | } | |
13923 | else | |
13924 | { | |
13925 | /* The size of the anonymous object containing | |
13926 | the bit field must be inferred from the type | |
13927 | attribute of the data member containing the | |
13928 | bit field. */ | |
13929 | anonymous_size = TYPE_LENGTH (fp->type); | |
13930 | } | |
f41f5e61 PA |
13931 | SET_FIELD_BITPOS (*fp, |
13932 | (FIELD_BITPOS (*fp) | |
13933 | + anonymous_size * bits_per_byte | |
13934 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13935 | } |
13936 | } | |
da5b30da AA |
13937 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13938 | if (attr != NULL) | |
13939 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13940 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13941 | |
13942 | /* Get name of field. */ | |
39cbfefa DJ |
13943 | fieldname = dwarf2_name (die, cu); |
13944 | if (fieldname == NULL) | |
13945 | fieldname = ""; | |
d8151005 DJ |
13946 | |
13947 | /* The name is already allocated along with this objfile, so we don't | |
13948 | need to duplicate it for the type. */ | |
13949 | fp->name = fieldname; | |
c906108c SS |
13950 | |
13951 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13952 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13953 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13954 | { |
d48cc9dd | 13955 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13956 | new_field->accessibility = DW_ACCESS_private; |
13957 | fip->non_public_fields = 1; | |
13958 | } | |
13959 | } | |
a9a9bd0f | 13960 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13961 | { |
a9a9bd0f DC |
13962 | /* C++ static member. */ |
13963 | ||
13964 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13965 | is a declaration, but all versions of G++ as of this writing | |
13966 | (so through at least 3.2.1) incorrectly generate | |
13967 | DW_TAG_variable tags. */ | |
6e70227d | 13968 | |
ff355380 | 13969 | const char *physname; |
c906108c | 13970 | |
a9a9bd0f | 13971 | /* Get name of field. */ |
39cbfefa DJ |
13972 | fieldname = dwarf2_name (die, cu); |
13973 | if (fieldname == NULL) | |
c906108c SS |
13974 | return; |
13975 | ||
254e6b9e | 13976 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13977 | if (attr |
13978 | /* Only create a symbol if this is an external value. | |
13979 | new_symbol checks this and puts the value in the global symbol | |
13980 | table, which we want. If it is not external, new_symbol | |
13981 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13982 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13983 | { |
13984 | /* A static const member, not much different than an enum as far as | |
13985 | we're concerned, except that we can support more types. */ | |
13986 | new_symbol (die, NULL, cu); | |
13987 | } | |
13988 | ||
2df3850c | 13989 | /* Get physical name. */ |
ff355380 | 13990 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13991 | |
d8151005 DJ |
13992 | /* The name is already allocated along with this objfile, so we don't |
13993 | need to duplicate it for the type. */ | |
13994 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13995 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13996 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13997 | } |
13998 | else if (die->tag == DW_TAG_inheritance) | |
13999 | { | |
74ac6d43 | 14000 | LONGEST offset; |
d4b96c9a | 14001 | |
74ac6d43 TT |
14002 | /* C++ base class field. */ |
14003 | if (handle_data_member_location (die, cu, &offset)) | |
14004 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 14005 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 14006 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
14007 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
14008 | fip->nbaseclasses++; | |
14009 | } | |
14010 | } | |
14011 | ||
98751a41 JK |
14012 | /* Add a typedef defined in the scope of the FIP's class. */ |
14013 | ||
14014 | static void | |
14015 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
14016 | struct dwarf2_cu *cu) | |
6e70227d | 14017 | { |
98751a41 | 14018 | struct typedef_field_list *new_field; |
98751a41 | 14019 | struct typedef_field *fp; |
98751a41 JK |
14020 | |
14021 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 14022 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
14023 | make_cleanup (xfree, new_field); |
14024 | ||
14025 | gdb_assert (die->tag == DW_TAG_typedef); | |
14026 | ||
14027 | fp = &new_field->field; | |
14028 | ||
14029 | /* Get name of field. */ | |
14030 | fp->name = dwarf2_name (die, cu); | |
14031 | if (fp->name == NULL) | |
14032 | return; | |
14033 | ||
14034 | fp->type = read_type_die (die, cu); | |
14035 | ||
c191a687 KS |
14036 | /* Save accessibility. */ |
14037 | enum dwarf_access_attribute accessibility; | |
14038 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
14039 | if (attr != NULL) | |
14040 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
14041 | else | |
14042 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14043 | switch (accessibility) | |
14044 | { | |
14045 | case DW_ACCESS_public: | |
14046 | /* The assumed value if neither private nor protected. */ | |
14047 | break; | |
14048 | case DW_ACCESS_private: | |
14049 | fp->is_private = 1; | |
14050 | break; | |
14051 | case DW_ACCESS_protected: | |
14052 | fp->is_protected = 1; | |
14053 | break; | |
14054 | default: | |
37534686 KS |
14055 | complaint (&symfile_complaints, |
14056 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); | |
c191a687 KS |
14057 | } |
14058 | ||
98751a41 JK |
14059 | new_field->next = fip->typedef_field_list; |
14060 | fip->typedef_field_list = new_field; | |
14061 | fip->typedef_field_list_count++; | |
14062 | } | |
14063 | ||
c906108c SS |
14064 | /* Create the vector of fields, and attach it to the type. */ |
14065 | ||
14066 | static void | |
fba45db2 | 14067 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14068 | struct dwarf2_cu *cu) |
c906108c SS |
14069 | { |
14070 | int nfields = fip->nfields; | |
14071 | ||
14072 | /* Record the field count, allocate space for the array of fields, | |
14073 | and create blank accessibility bitfields if necessary. */ | |
14074 | TYPE_NFIELDS (type) = nfields; | |
14075 | TYPE_FIELDS (type) = (struct field *) | |
14076 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
14077 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
14078 | ||
b4ba55a1 | 14079 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14080 | { |
14081 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14082 | ||
14083 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14084 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14085 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14086 | ||
14087 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14088 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14089 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14090 | ||
774b6a14 TT |
14091 | TYPE_FIELD_IGNORE_BITS (type) = |
14092 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14093 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14094 | } |
14095 | ||
14096 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14097 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 14098 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
14099 | { |
14100 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 14101 | unsigned char *pointer; |
c906108c SS |
14102 | |
14103 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14104 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14105 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
14106 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
14107 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
14108 | } | |
14109 | ||
3e43a32a MS |
14110 | /* Copy the saved-up fields into the field vector. Start from the head of |
14111 | the list, adding to the tail of the field array, so that they end up in | |
14112 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
14113 | while (nfields-- > 0) |
14114 | { | |
7d0ccb61 DJ |
14115 | struct nextfield *fieldp; |
14116 | ||
14117 | if (fip->fields) | |
14118 | { | |
14119 | fieldp = fip->fields; | |
14120 | fip->fields = fieldp->next; | |
14121 | } | |
14122 | else | |
14123 | { | |
14124 | fieldp = fip->baseclasses; | |
14125 | fip->baseclasses = fieldp->next; | |
14126 | } | |
14127 | ||
14128 | TYPE_FIELD (type, nfields) = fieldp->field; | |
14129 | switch (fieldp->accessibility) | |
c906108c | 14130 | { |
c5aa993b | 14131 | case DW_ACCESS_private: |
b4ba55a1 JB |
14132 | if (cu->language != language_ada) |
14133 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 14134 | break; |
c906108c | 14135 | |
c5aa993b | 14136 | case DW_ACCESS_protected: |
b4ba55a1 JB |
14137 | if (cu->language != language_ada) |
14138 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 14139 | break; |
c906108c | 14140 | |
c5aa993b JM |
14141 | case DW_ACCESS_public: |
14142 | break; | |
c906108c | 14143 | |
c5aa993b JM |
14144 | default: |
14145 | /* Unknown accessibility. Complain and treat it as public. */ | |
14146 | { | |
e2e0b3e5 | 14147 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 14148 | fieldp->accessibility); |
c5aa993b JM |
14149 | } |
14150 | break; | |
c906108c SS |
14151 | } |
14152 | if (nfields < fip->nbaseclasses) | |
14153 | { | |
7d0ccb61 | 14154 | switch (fieldp->virtuality) |
c906108c | 14155 | { |
c5aa993b JM |
14156 | case DW_VIRTUALITY_virtual: |
14157 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14158 | if (cu->language == language_ada) |
a73c6dcd | 14159 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
14160 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
14161 | break; | |
c906108c SS |
14162 | } |
14163 | } | |
c906108c SS |
14164 | } |
14165 | } | |
14166 | ||
7d27a96d TT |
14167 | /* Return true if this member function is a constructor, false |
14168 | otherwise. */ | |
14169 | ||
14170 | static int | |
14171 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14172 | { | |
14173 | const char *fieldname; | |
fe978cb0 | 14174 | const char *type_name; |
7d27a96d TT |
14175 | int len; |
14176 | ||
14177 | if (die->parent == NULL) | |
14178 | return 0; | |
14179 | ||
14180 | if (die->parent->tag != DW_TAG_structure_type | |
14181 | && die->parent->tag != DW_TAG_union_type | |
14182 | && die->parent->tag != DW_TAG_class_type) | |
14183 | return 0; | |
14184 | ||
14185 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14186 | type_name = dwarf2_name (die->parent, cu); |
14187 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14188 | return 0; |
14189 | ||
14190 | len = strlen (fieldname); | |
fe978cb0 PA |
14191 | return (strncmp (fieldname, type_name, len) == 0 |
14192 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14193 | } |
14194 | ||
c906108c SS |
14195 | /* Add a member function to the proper fieldlist. */ |
14196 | ||
14197 | static void | |
107d2387 | 14198 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14199 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14200 | { |
e7c27a73 | 14201 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14202 | struct attribute *attr; |
14203 | struct fnfieldlist *flp; | |
14204 | int i; | |
14205 | struct fn_field *fnp; | |
15d034d0 | 14206 | const char *fieldname; |
c906108c | 14207 | struct nextfnfield *new_fnfield; |
f792889a | 14208 | struct type *this_type; |
60d5a603 | 14209 | enum dwarf_access_attribute accessibility; |
c906108c | 14210 | |
b4ba55a1 | 14211 | if (cu->language == language_ada) |
a73c6dcd | 14212 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14213 | |
2df3850c | 14214 | /* Get name of member function. */ |
39cbfefa DJ |
14215 | fieldname = dwarf2_name (die, cu); |
14216 | if (fieldname == NULL) | |
2df3850c | 14217 | return; |
c906108c | 14218 | |
c906108c SS |
14219 | /* Look up member function name in fieldlist. */ |
14220 | for (i = 0; i < fip->nfnfields; i++) | |
14221 | { | |
27bfe10e | 14222 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
14223 | break; |
14224 | } | |
14225 | ||
14226 | /* Create new list element if necessary. */ | |
14227 | if (i < fip->nfnfields) | |
14228 | flp = &fip->fnfieldlists[i]; | |
14229 | else | |
14230 | { | |
14231 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14232 | { | |
14233 | fip->fnfieldlists = (struct fnfieldlist *) | |
14234 | xrealloc (fip->fnfieldlists, | |
14235 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14236 | * sizeof (struct fnfieldlist)); |
c906108c | 14237 | if (fip->nfnfields == 0) |
c13c43fd | 14238 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
14239 | } |
14240 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
14241 | flp->name = fieldname; | |
14242 | flp->length = 0; | |
14243 | flp->head = NULL; | |
3da10d80 | 14244 | i = fip->nfnfields++; |
c906108c SS |
14245 | } |
14246 | ||
14247 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 14248 | entry. */ |
8d749320 | 14249 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 14250 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
14251 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
14252 | new_fnfield->next = flp->head; | |
14253 | flp->head = new_fnfield; | |
14254 | flp->length++; | |
14255 | ||
14256 | /* Fill in the member function field info. */ | |
14257 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
14258 | |
14259 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14260 | if (cu->language == language_cplus) |
3da10d80 KS |
14261 | { |
14262 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
14263 | die, cu); | |
14264 | } | |
14265 | else | |
14266 | { | |
1d06ead6 | 14267 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14268 | fnp->physname = physname ? physname : ""; |
14269 | } | |
14270 | ||
c906108c | 14271 | fnp->type = alloc_type (objfile); |
f792889a DJ |
14272 | this_type = read_type_die (die, cu); |
14273 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 14274 | { |
f792889a | 14275 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 14276 | |
f792889a | 14277 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
14278 | of the method itself (TYPE_CODE_METHOD). */ |
14279 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
14280 | TYPE_TARGET_TYPE (this_type), |
14281 | TYPE_FIELDS (this_type), | |
14282 | TYPE_NFIELDS (this_type), | |
14283 | TYPE_VARARGS (this_type)); | |
c906108c SS |
14284 | |
14285 | /* Handle static member functions. | |
c5aa993b | 14286 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
14287 | member functions. G++ helps GDB by marking the first |
14288 | parameter for non-static member functions (which is the this | |
14289 | pointer) as artificial. We obtain this information from | |
14290 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 14291 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
14292 | fnp->voffset = VOFFSET_STATIC; |
14293 | } | |
14294 | else | |
e2e0b3e5 | 14295 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 14296 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
14297 | |
14298 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 14299 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 14300 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 14301 | |
3e43a32a MS |
14302 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
14303 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
14304 | |
14305 | /* Get accessibility. */ | |
e142c38c | 14306 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 14307 | if (attr) |
aead7601 | 14308 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
14309 | else |
14310 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14311 | switch (accessibility) | |
c906108c | 14312 | { |
60d5a603 JK |
14313 | case DW_ACCESS_private: |
14314 | fnp->is_private = 1; | |
14315 | break; | |
14316 | case DW_ACCESS_protected: | |
14317 | fnp->is_protected = 1; | |
14318 | break; | |
c906108c SS |
14319 | } |
14320 | ||
b02dede2 | 14321 | /* Check for artificial methods. */ |
e142c38c | 14322 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
14323 | if (attr && DW_UNSND (attr) != 0) |
14324 | fnp->is_artificial = 1; | |
14325 | ||
7d27a96d TT |
14326 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
14327 | ||
0d564a31 | 14328 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
14329 | function. For older versions of GCC, this is an offset in the |
14330 | appropriate virtual table, as specified by DW_AT_containing_type. | |
14331 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
14332 | to the object address. */ |
14333 | ||
e142c38c | 14334 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 14335 | if (attr) |
8e19ed76 | 14336 | { |
aec5aa8b | 14337 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14338 | { |
aec5aa8b TT |
14339 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14340 | { | |
14341 | /* Old-style GCC. */ | |
14342 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14343 | } | |
14344 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14345 | || (DW_BLOCK (attr)->size > 1 | |
14346 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14347 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14348 | { | |
aec5aa8b TT |
14349 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14350 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14351 | dwarf2_complex_location_expr_complaint (); | |
14352 | else | |
14353 | fnp->voffset /= cu->header.addr_size; | |
14354 | fnp->voffset += 2; | |
14355 | } | |
14356 | else | |
14357 | dwarf2_complex_location_expr_complaint (); | |
14358 | ||
14359 | if (!fnp->fcontext) | |
7e993ebf KS |
14360 | { |
14361 | /* If there is no `this' field and no DW_AT_containing_type, | |
14362 | we cannot actually find a base class context for the | |
14363 | vtable! */ | |
14364 | if (TYPE_NFIELDS (this_type) == 0 | |
14365 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14366 | { | |
14367 | complaint (&symfile_complaints, | |
14368 | _("cannot determine context for virtual member " | |
14369 | "function \"%s\" (offset %d)"), | |
9c541725 | 14370 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
14371 | } |
14372 | else | |
14373 | { | |
14374 | fnp->fcontext | |
14375 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14376 | } | |
14377 | } | |
aec5aa8b | 14378 | } |
3690dd37 | 14379 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 14380 | { |
4d3c2250 | 14381 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14382 | } |
14383 | else | |
14384 | { | |
4d3c2250 KB |
14385 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14386 | fieldname); | |
8e19ed76 | 14387 | } |
0d564a31 | 14388 | } |
d48cc9dd DJ |
14389 | else |
14390 | { | |
14391 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14392 | if (attr && DW_UNSND (attr)) | |
14393 | { | |
14394 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
14395 | complaint (&symfile_complaints, | |
3e43a32a MS |
14396 | _("Member function \"%s\" (offset %d) is virtual " |
14397 | "but the vtable offset is not specified"), | |
9c541725 | 14398 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 14399 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14400 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14401 | } | |
14402 | } | |
c906108c SS |
14403 | } |
14404 | ||
14405 | /* Create the vector of member function fields, and attach it to the type. */ | |
14406 | ||
14407 | static void | |
fba45db2 | 14408 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14409 | struct dwarf2_cu *cu) |
c906108c SS |
14410 | { |
14411 | struct fnfieldlist *flp; | |
c906108c SS |
14412 | int i; |
14413 | ||
b4ba55a1 | 14414 | if (cu->language == language_ada) |
a73c6dcd | 14415 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14416 | |
c906108c SS |
14417 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14418 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
14419 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
14420 | ||
14421 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
14422 | { | |
14423 | struct nextfnfield *nfp = flp->head; | |
14424 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
14425 | int k; | |
14426 | ||
14427 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
14428 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
14429 | fn_flp->fn_fields = (struct fn_field *) | |
14430 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
14431 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 14432 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
14433 | } |
14434 | ||
14435 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
14436 | } |
14437 | ||
1168df01 JB |
14438 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14439 | language, zero otherwise. */ | |
14440 | static int | |
14441 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14442 | { | |
14443 | static const char vptr[] = "_vptr"; | |
987504bb | 14444 | static const char vtable[] = "vtable"; |
1168df01 | 14445 | |
9c37b5ae TT |
14446 | /* Look for the C++ form of the vtable. */ |
14447 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14448 | return 1; |
14449 | ||
14450 | return 0; | |
14451 | } | |
14452 | ||
c0dd20ea | 14453 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14454 | functions, with the ABI-specified layout. If TYPE describes |
14455 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14456 | |
14457 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14458 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14459 | |
0b92b5bb TT |
14460 | static void |
14461 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14462 | { |
09e2d7c7 | 14463 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14464 | |
14465 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14466 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14467 | return; | |
c0dd20ea DJ |
14468 | |
14469 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14470 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14471 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14472 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14473 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14474 | return; | |
c0dd20ea DJ |
14475 | |
14476 | /* Find the type of the method. */ | |
0b92b5bb | 14477 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14478 | if (pfn_type == NULL |
14479 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14480 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14481 | return; |
c0dd20ea DJ |
14482 | |
14483 | /* Look for the "this" argument. */ | |
14484 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14485 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14486 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14487 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14488 | return; |
c0dd20ea | 14489 | |
09e2d7c7 | 14490 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14491 | new_type = alloc_type (objfile); |
09e2d7c7 | 14492 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14493 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14494 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14495 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14496 | } |
1168df01 | 14497 | |
685b1105 | 14498 | |
c906108c | 14499 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
14500 | (definition) to create a type for the structure or union. Fill in |
14501 | the type's name and general properties; the members will not be | |
83655187 DE |
14502 | processed until process_structure_scope. A symbol table entry for |
14503 | the type will also not be done until process_structure_scope (assuming | |
14504 | the type has a name). | |
c906108c | 14505 | |
c767944b DJ |
14506 | NOTE: we need to call these functions regardless of whether or not the |
14507 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 14508 | structure or union. This gets the type entered into our set of |
83655187 | 14509 | user defined types. */ |
c906108c | 14510 | |
f792889a | 14511 | static struct type * |
134d01f1 | 14512 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14513 | { |
e7c27a73 | 14514 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14515 | struct type *type; |
14516 | struct attribute *attr; | |
15d034d0 | 14517 | const char *name; |
c906108c | 14518 | |
348e048f DE |
14519 | /* If the definition of this type lives in .debug_types, read that type. |
14520 | Don't follow DW_AT_specification though, that will take us back up | |
14521 | the chain and we want to go down. */ | |
45e58e77 | 14522 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14523 | if (attr) |
14524 | { | |
ac9ec31b | 14525 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14526 | |
ac9ec31b | 14527 | /* The type's CU may not be the same as CU. |
02142a6c | 14528 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14529 | return set_die_type (die, type, cu); |
14530 | } | |
14531 | ||
c0dd20ea | 14532 | type = alloc_type (objfile); |
c906108c | 14533 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 14534 | |
39cbfefa DJ |
14535 | name = dwarf2_name (die, cu); |
14536 | if (name != NULL) | |
c906108c | 14537 | { |
987504bb | 14538 | if (cu->language == language_cplus |
c44af4eb TT |
14539 | || cu->language == language_d |
14540 | || cu->language == language_rust) | |
63d06c5c | 14541 | { |
15d034d0 | 14542 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
14543 | |
14544 | /* dwarf2_full_name might have already finished building the DIE's | |
14545 | type. If so, there is no need to continue. */ | |
14546 | if (get_die_type (die, cu) != NULL) | |
14547 | return get_die_type (die, cu); | |
14548 | ||
14549 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
14550 | if (die->tag == DW_TAG_structure_type |
14551 | || die->tag == DW_TAG_class_type) | |
14552 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
14553 | } |
14554 | else | |
14555 | { | |
d8151005 DJ |
14556 | /* The name is already allocated along with this objfile, so |
14557 | we don't need to duplicate it for the type. */ | |
7d455152 | 14558 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
14559 | if (die->tag == DW_TAG_class_type) |
14560 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 14561 | } |
c906108c SS |
14562 | } |
14563 | ||
14564 | if (die->tag == DW_TAG_structure_type) | |
14565 | { | |
14566 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
14567 | } | |
14568 | else if (die->tag == DW_TAG_union_type) | |
14569 | { | |
14570 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
14571 | } | |
14572 | else | |
14573 | { | |
4753d33b | 14574 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
14575 | } |
14576 | ||
0cc2414c TT |
14577 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
14578 | TYPE_DECLARED_CLASS (type) = 1; | |
14579 | ||
e142c38c | 14580 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14581 | if (attr) |
14582 | { | |
155bfbd3 JB |
14583 | if (attr_form_is_constant (attr)) |
14584 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14585 | else | |
14586 | { | |
14587 | /* For the moment, dynamic type sizes are not supported | |
14588 | by GDB's struct type. The actual size is determined | |
14589 | on-demand when resolving the type of a given object, | |
14590 | so set the type's length to zero for now. Otherwise, | |
14591 | we record an expression as the length, and that expression | |
14592 | could lead to a very large value, which could eventually | |
14593 | lead to us trying to allocate that much memory when creating | |
14594 | a value of that type. */ | |
14595 | TYPE_LENGTH (type) = 0; | |
14596 | } | |
c906108c SS |
14597 | } |
14598 | else | |
14599 | { | |
14600 | TYPE_LENGTH (type) = 0; | |
14601 | } | |
14602 | ||
5230b05a | 14603 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 14604 | { |
5230b05a WT |
14605 | /* ICC<14 does not output the required DW_AT_declaration on |
14606 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 14607 | TYPE_STUB (type) = 1; |
685b1105 JK |
14608 | } |
14609 | else | |
14610 | TYPE_STUB_SUPPORTED (type) = 1; | |
14611 | ||
dc718098 | 14612 | if (die_is_declaration (die, cu)) |
876cecd0 | 14613 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
14614 | else if (attr == NULL && die->child == NULL |
14615 | && producer_is_realview (cu->producer)) | |
14616 | /* RealView does not output the required DW_AT_declaration | |
14617 | on incomplete types. */ | |
14618 | TYPE_STUB (type) = 1; | |
dc718098 | 14619 | |
c906108c SS |
14620 | /* We need to add the type field to the die immediately so we don't |
14621 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 14622 | type within the structure itself. */ |
1c379e20 | 14623 | set_die_type (die, type, cu); |
c906108c | 14624 | |
7e314c57 JK |
14625 | /* set_die_type should be already done. */ |
14626 | set_descriptive_type (type, die, cu); | |
14627 | ||
c767944b DJ |
14628 | return type; |
14629 | } | |
14630 | ||
14631 | /* Finish creating a structure or union type, including filling in | |
14632 | its members and creating a symbol for it. */ | |
14633 | ||
14634 | static void | |
14635 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14636 | { | |
14637 | struct objfile *objfile = cu->objfile; | |
ca040673 | 14638 | struct die_info *child_die; |
c767944b DJ |
14639 | struct type *type; |
14640 | ||
14641 | type = get_die_type (die, cu); | |
14642 | if (type == NULL) | |
14643 | type = read_structure_type (die, cu); | |
14644 | ||
e142c38c | 14645 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
14646 | { |
14647 | struct field_info fi; | |
2f4732b0 | 14648 | std::vector<struct symbol *> template_args; |
c767944b | 14649 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
14650 | |
14651 | memset (&fi, 0, sizeof (struct field_info)); | |
14652 | ||
639d11d3 | 14653 | child_die = die->child; |
c906108c SS |
14654 | |
14655 | while (child_die && child_die->tag) | |
14656 | { | |
a9a9bd0f DC |
14657 | if (child_die->tag == DW_TAG_member |
14658 | || child_die->tag == DW_TAG_variable) | |
c906108c | 14659 | { |
a9a9bd0f DC |
14660 | /* NOTE: carlton/2002-11-05: A C++ static data member |
14661 | should be a DW_TAG_member that is a declaration, but | |
14662 | all versions of G++ as of this writing (so through at | |
14663 | least 3.2.1) incorrectly generate DW_TAG_variable | |
14664 | tags for them instead. */ | |
e7c27a73 | 14665 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14666 | } |
8713b1b1 | 14667 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 14668 | { |
e98c9e7c TT |
14669 | /* Rust doesn't have member functions in the C++ sense. |
14670 | However, it does emit ordinary functions as children | |
14671 | of a struct DIE. */ | |
14672 | if (cu->language == language_rust) | |
14673 | read_func_scope (child_die, cu); | |
14674 | else | |
14675 | { | |
14676 | /* C++ member function. */ | |
14677 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
14678 | } | |
c906108c SS |
14679 | } |
14680 | else if (child_die->tag == DW_TAG_inheritance) | |
14681 | { | |
14682 | /* C++ base class field. */ | |
e7c27a73 | 14683 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14684 | } |
98751a41 JK |
14685 | else if (child_die->tag == DW_TAG_typedef) |
14686 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
14687 | else if (child_die->tag == DW_TAG_template_type_param |
14688 | || child_die->tag == DW_TAG_template_value_param) | |
14689 | { | |
14690 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
14691 | ||
f1078f66 | 14692 | if (arg != NULL) |
2f4732b0 | 14693 | template_args.push_back (arg); |
34eaf542 TT |
14694 | } |
14695 | ||
c906108c SS |
14696 | child_die = sibling_die (child_die); |
14697 | } | |
14698 | ||
34eaf542 | 14699 | /* Attach template arguments to type. */ |
2f4732b0 | 14700 | if (!template_args.empty ()) |
34eaf542 TT |
14701 | { |
14702 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
2f4732b0 | 14703 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 14704 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
14705 | = XOBNEWVEC (&objfile->objfile_obstack, |
14706 | struct symbol *, | |
14707 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 14708 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 14709 | template_args.data (), |
34eaf542 TT |
14710 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
14711 | * sizeof (struct symbol *))); | |
34eaf542 TT |
14712 | } |
14713 | ||
c906108c SS |
14714 | /* Attach fields and member functions to the type. */ |
14715 | if (fi.nfields) | |
e7c27a73 | 14716 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
14717 | if (fi.nfnfields) |
14718 | { | |
e7c27a73 | 14719 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 14720 | |
c5aa993b | 14721 | /* Get the type which refers to the base class (possibly this |
c906108c | 14722 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
14723 | class from the DW_AT_containing_type attribute. This use of |
14724 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 14725 | |
e142c38c | 14726 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 14727 | { |
e7c27a73 | 14728 | struct type *t = die_containing_type (die, cu); |
c906108c | 14729 | |
ae6ae975 | 14730 | set_type_vptr_basetype (type, t); |
c906108c SS |
14731 | if (type == t) |
14732 | { | |
c906108c SS |
14733 | int i; |
14734 | ||
14735 | /* Our own class provides vtbl ptr. */ | |
14736 | for (i = TYPE_NFIELDS (t) - 1; | |
14737 | i >= TYPE_N_BASECLASSES (t); | |
14738 | --i) | |
14739 | { | |
0d5cff50 | 14740 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 14741 | |
1168df01 | 14742 | if (is_vtable_name (fieldname, cu)) |
c906108c | 14743 | { |
ae6ae975 | 14744 | set_type_vptr_fieldno (type, i); |
c906108c SS |
14745 | break; |
14746 | } | |
14747 | } | |
14748 | ||
14749 | /* Complain if virtual function table field not found. */ | |
14750 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 14751 | complaint (&symfile_complaints, |
3e43a32a MS |
14752 | _("virtual function table pointer " |
14753 | "not found when defining class '%s'"), | |
4d3c2250 KB |
14754 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
14755 | ""); | |
c906108c SS |
14756 | } |
14757 | else | |
14758 | { | |
ae6ae975 | 14759 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
14760 | } |
14761 | } | |
f6235d4c | 14762 | else if (cu->producer |
61012eef | 14763 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
14764 | { |
14765 | /* The IBM XLC compiler does not provide direct indication | |
14766 | of the containing type, but the vtable pointer is | |
14767 | always named __vfp. */ | |
14768 | ||
14769 | int i; | |
14770 | ||
14771 | for (i = TYPE_NFIELDS (type) - 1; | |
14772 | i >= TYPE_N_BASECLASSES (type); | |
14773 | --i) | |
14774 | { | |
14775 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
14776 | { | |
ae6ae975 DE |
14777 | set_type_vptr_fieldno (type, i); |
14778 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
14779 | break; |
14780 | } | |
14781 | } | |
14782 | } | |
c906108c | 14783 | } |
98751a41 JK |
14784 | |
14785 | /* Copy fi.typedef_field_list linked list elements content into the | |
14786 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
14787 | if (fi.typedef_field_list) | |
14788 | { | |
14789 | int i = fi.typedef_field_list_count; | |
14790 | ||
a0d7a4ff | 14791 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 14792 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
14793 | = ((struct typedef_field *) |
14794 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
14795 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
14796 | ||
14797 | /* Reverse the list order to keep the debug info elements order. */ | |
14798 | while (--i >= 0) | |
14799 | { | |
14800 | struct typedef_field *dest, *src; | |
6e70227d | 14801 | |
98751a41 JK |
14802 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
14803 | src = &fi.typedef_field_list->field; | |
14804 | fi.typedef_field_list = fi.typedef_field_list->next; | |
14805 | *dest = *src; | |
14806 | } | |
14807 | } | |
c767944b DJ |
14808 | |
14809 | do_cleanups (back_to); | |
c906108c | 14810 | } |
63d06c5c | 14811 | |
bb5ed363 | 14812 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 14813 | |
90aeadfc DC |
14814 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
14815 | snapshots) has been known to create a die giving a declaration | |
14816 | for a class that has, as a child, a die giving a definition for a | |
14817 | nested class. So we have to process our children even if the | |
14818 | current die is a declaration. Normally, of course, a declaration | |
14819 | won't have any children at all. */ | |
134d01f1 | 14820 | |
ca040673 DE |
14821 | child_die = die->child; |
14822 | ||
90aeadfc DC |
14823 | while (child_die != NULL && child_die->tag) |
14824 | { | |
14825 | if (child_die->tag == DW_TAG_member | |
14826 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
14827 | || child_die->tag == DW_TAG_inheritance |
14828 | || child_die->tag == DW_TAG_template_value_param | |
14829 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 14830 | { |
90aeadfc | 14831 | /* Do nothing. */ |
134d01f1 | 14832 | } |
90aeadfc DC |
14833 | else |
14834 | process_die (child_die, cu); | |
134d01f1 | 14835 | |
90aeadfc | 14836 | child_die = sibling_die (child_die); |
134d01f1 DJ |
14837 | } |
14838 | ||
fa4028e9 JB |
14839 | /* Do not consider external references. According to the DWARF standard, |
14840 | these DIEs are identified by the fact that they have no byte_size | |
14841 | attribute, and a declaration attribute. */ | |
14842 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
14843 | || !die_is_declaration (die, cu)) | |
c767944b | 14844 | new_symbol (die, type, cu); |
134d01f1 DJ |
14845 | } |
14846 | ||
55426c9d JB |
14847 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
14848 | update TYPE using some information only available in DIE's children. */ | |
14849 | ||
14850 | static void | |
14851 | update_enumeration_type_from_children (struct die_info *die, | |
14852 | struct type *type, | |
14853 | struct dwarf2_cu *cu) | |
14854 | { | |
60f7655a | 14855 | struct die_info *child_die; |
55426c9d JB |
14856 | int unsigned_enum = 1; |
14857 | int flag_enum = 1; | |
14858 | ULONGEST mask = 0; | |
55426c9d | 14859 | |
8268c778 | 14860 | auto_obstack obstack; |
55426c9d | 14861 | |
60f7655a DE |
14862 | for (child_die = die->child; |
14863 | child_die != NULL && child_die->tag; | |
14864 | child_die = sibling_die (child_die)) | |
55426c9d JB |
14865 | { |
14866 | struct attribute *attr; | |
14867 | LONGEST value; | |
14868 | const gdb_byte *bytes; | |
14869 | struct dwarf2_locexpr_baton *baton; | |
14870 | const char *name; | |
60f7655a | 14871 | |
55426c9d JB |
14872 | if (child_die->tag != DW_TAG_enumerator) |
14873 | continue; | |
14874 | ||
14875 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
14876 | if (attr == NULL) | |
14877 | continue; | |
14878 | ||
14879 | name = dwarf2_name (child_die, cu); | |
14880 | if (name == NULL) | |
14881 | name = "<anonymous enumerator>"; | |
14882 | ||
14883 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
14884 | &value, &bytes, &baton); | |
14885 | if (value < 0) | |
14886 | { | |
14887 | unsigned_enum = 0; | |
14888 | flag_enum = 0; | |
14889 | } | |
14890 | else if ((mask & value) != 0) | |
14891 | flag_enum = 0; | |
14892 | else | |
14893 | mask |= value; | |
14894 | ||
14895 | /* If we already know that the enum type is neither unsigned, nor | |
14896 | a flag type, no need to look at the rest of the enumerates. */ | |
14897 | if (!unsigned_enum && !flag_enum) | |
14898 | break; | |
55426c9d JB |
14899 | } |
14900 | ||
14901 | if (unsigned_enum) | |
14902 | TYPE_UNSIGNED (type) = 1; | |
14903 | if (flag_enum) | |
14904 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
14905 | } |
14906 | ||
134d01f1 DJ |
14907 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
14908 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 14909 | |
f792889a | 14910 | static struct type * |
134d01f1 | 14911 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14912 | { |
e7c27a73 | 14913 | struct objfile *objfile = cu->objfile; |
c906108c | 14914 | struct type *type; |
c906108c | 14915 | struct attribute *attr; |
0114d602 | 14916 | const char *name; |
134d01f1 | 14917 | |
348e048f DE |
14918 | /* If the definition of this type lives in .debug_types, read that type. |
14919 | Don't follow DW_AT_specification though, that will take us back up | |
14920 | the chain and we want to go down. */ | |
45e58e77 | 14921 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14922 | if (attr) |
14923 | { | |
ac9ec31b | 14924 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14925 | |
ac9ec31b | 14926 | /* The type's CU may not be the same as CU. |
02142a6c | 14927 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14928 | return set_die_type (die, type, cu); |
14929 | } | |
14930 | ||
c906108c SS |
14931 | type = alloc_type (objfile); |
14932 | ||
14933 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14934 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14935 | if (name != NULL) |
7d455152 | 14936 | TYPE_TAG_NAME (type) = name; |
c906108c | 14937 | |
0626fc76 TT |
14938 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14939 | if (attr != NULL) | |
14940 | { | |
14941 | struct type *underlying_type = die_type (die, cu); | |
14942 | ||
14943 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14944 | } | |
14945 | ||
e142c38c | 14946 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14947 | if (attr) |
14948 | { | |
14949 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14950 | } | |
14951 | else | |
14952 | { | |
14953 | TYPE_LENGTH (type) = 0; | |
14954 | } | |
14955 | ||
137033e9 JB |
14956 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14957 | declared as private in the package spec, and then defined only | |
14958 | inside the package body. Such types are known as Taft Amendment | |
14959 | Types. When another package uses such a type, an incomplete DIE | |
14960 | may be generated by the compiler. */ | |
02eb380e | 14961 | if (die_is_declaration (die, cu)) |
876cecd0 | 14962 | TYPE_STUB (type) = 1; |
02eb380e | 14963 | |
0626fc76 TT |
14964 | /* Finish the creation of this type by using the enum's children. |
14965 | We must call this even when the underlying type has been provided | |
14966 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14967 | update_enumeration_type_from_children (die, type, cu); |
14968 | ||
0626fc76 TT |
14969 | /* If this type has an underlying type that is not a stub, then we |
14970 | may use its attributes. We always use the "unsigned" attribute | |
14971 | in this situation, because ordinarily we guess whether the type | |
14972 | is unsigned -- but the guess can be wrong and the underlying type | |
14973 | can tell us the reality. However, we defer to a local size | |
14974 | attribute if one exists, because this lets the compiler override | |
14975 | the underlying type if needed. */ | |
14976 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14977 | { | |
14978 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14979 | if (TYPE_LENGTH (type) == 0) | |
14980 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14981 | } | |
14982 | ||
3d567982 TT |
14983 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14984 | ||
f792889a | 14985 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14986 | } |
14987 | ||
14988 | /* Given a pointer to a die which begins an enumeration, process all | |
14989 | the dies that define the members of the enumeration, and create the | |
14990 | symbol for the enumeration type. | |
14991 | ||
14992 | NOTE: We reverse the order of the element list. */ | |
14993 | ||
14994 | static void | |
14995 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14996 | { | |
f792889a | 14997 | struct type *this_type; |
134d01f1 | 14998 | |
f792889a DJ |
14999 | this_type = get_die_type (die, cu); |
15000 | if (this_type == NULL) | |
15001 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 15002 | |
639d11d3 | 15003 | if (die->child != NULL) |
c906108c | 15004 | { |
9dc481d3 DE |
15005 | struct die_info *child_die; |
15006 | struct symbol *sym; | |
15007 | struct field *fields = NULL; | |
15008 | int num_fields = 0; | |
15d034d0 | 15009 | const char *name; |
9dc481d3 | 15010 | |
639d11d3 | 15011 | child_die = die->child; |
c906108c SS |
15012 | while (child_die && child_die->tag) |
15013 | { | |
15014 | if (child_die->tag != DW_TAG_enumerator) | |
15015 | { | |
e7c27a73 | 15016 | process_die (child_die, cu); |
c906108c SS |
15017 | } |
15018 | else | |
15019 | { | |
39cbfefa DJ |
15020 | name = dwarf2_name (child_die, cu); |
15021 | if (name) | |
c906108c | 15022 | { |
f792889a | 15023 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
15024 | |
15025 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
15026 | { | |
15027 | fields = (struct field *) | |
15028 | xrealloc (fields, | |
15029 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 15030 | * sizeof (struct field)); |
c906108c SS |
15031 | } |
15032 | ||
3567439c | 15033 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 15034 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 15035 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
15036 | FIELD_BITSIZE (fields[num_fields]) = 0; |
15037 | ||
15038 | num_fields++; | |
15039 | } | |
15040 | } | |
15041 | ||
15042 | child_die = sibling_die (child_die); | |
15043 | } | |
15044 | ||
15045 | if (num_fields) | |
15046 | { | |
f792889a DJ |
15047 | TYPE_NFIELDS (this_type) = num_fields; |
15048 | TYPE_FIELDS (this_type) = (struct field *) | |
15049 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
15050 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 15051 | sizeof (struct field) * num_fields); |
b8c9b27d | 15052 | xfree (fields); |
c906108c | 15053 | } |
c906108c | 15054 | } |
134d01f1 | 15055 | |
6c83ed52 TT |
15056 | /* If we are reading an enum from a .debug_types unit, and the enum |
15057 | is a declaration, and the enum is not the signatured type in the | |
15058 | unit, then we do not want to add a symbol for it. Adding a | |
15059 | symbol would in some cases obscure the true definition of the | |
15060 | enum, giving users an incomplete type when the definition is | |
15061 | actually available. Note that we do not want to do this for all | |
15062 | enums which are just declarations, because C++0x allows forward | |
15063 | enum declarations. */ | |
3019eac3 | 15064 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
15065 | && die_is_declaration (die, cu)) |
15066 | { | |
52dc124a | 15067 | struct signatured_type *sig_type; |
6c83ed52 | 15068 | |
c0f78cd4 | 15069 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
15070 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
15071 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
15072 | return; |
15073 | } | |
15074 | ||
f792889a | 15075 | new_symbol (die, this_type, cu); |
c906108c SS |
15076 | } |
15077 | ||
15078 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
15079 | the DIE's type field. For now, this only handles one dimensional | |
15080 | arrays. */ | |
15081 | ||
f792889a | 15082 | static struct type * |
e7c27a73 | 15083 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15084 | { |
e7c27a73 | 15085 | struct objfile *objfile = cu->objfile; |
c906108c | 15086 | struct die_info *child_die; |
7e314c57 | 15087 | struct type *type; |
c906108c | 15088 | struct type *element_type, *range_type, *index_type; |
c906108c | 15089 | struct attribute *attr; |
15d034d0 | 15090 | const char *name; |
dc53a7ad | 15091 | unsigned int bit_stride = 0; |
c906108c | 15092 | |
e7c27a73 | 15093 | element_type = die_type (die, cu); |
c906108c | 15094 | |
7e314c57 JK |
15095 | /* The die_type call above may have already set the type for this DIE. */ |
15096 | type = get_die_type (die, cu); | |
15097 | if (type) | |
15098 | return type; | |
15099 | ||
dc53a7ad JB |
15100 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
15101 | if (attr != NULL) | |
15102 | bit_stride = DW_UNSND (attr) * 8; | |
15103 | ||
15104 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
15105 | if (attr != NULL) | |
15106 | bit_stride = DW_UNSND (attr); | |
15107 | ||
c906108c SS |
15108 | /* Irix 6.2 native cc creates array types without children for |
15109 | arrays with unspecified length. */ | |
639d11d3 | 15110 | if (die->child == NULL) |
c906108c | 15111 | { |
46bf5051 | 15112 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15113 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
15114 | type = create_array_type_with_stride (NULL, element_type, range_type, |
15115 | bit_stride); | |
f792889a | 15116 | return set_die_type (die, type, cu); |
c906108c SS |
15117 | } |
15118 | ||
791afaa2 | 15119 | std::vector<struct type *> range_types; |
639d11d3 | 15120 | child_die = die->child; |
c906108c SS |
15121 | while (child_die && child_die->tag) |
15122 | { | |
15123 | if (child_die->tag == DW_TAG_subrange_type) | |
15124 | { | |
f792889a | 15125 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 15126 | |
f792889a | 15127 | if (child_type != NULL) |
a02abb62 | 15128 | { |
0963b4bd MS |
15129 | /* The range type was succesfully read. Save it for the |
15130 | array type creation. */ | |
791afaa2 | 15131 | range_types.push_back (child_type); |
a02abb62 | 15132 | } |
c906108c SS |
15133 | } |
15134 | child_die = sibling_die (child_die); | |
15135 | } | |
15136 | ||
15137 | /* Dwarf2 dimensions are output from left to right, create the | |
15138 | necessary array types in backwards order. */ | |
7ca2d3a3 | 15139 | |
c906108c | 15140 | type = element_type; |
7ca2d3a3 DL |
15141 | |
15142 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
15143 | { | |
15144 | int i = 0; | |
9a619af0 | 15145 | |
791afaa2 | 15146 | while (i < range_types.size ()) |
dc53a7ad JB |
15147 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
15148 | bit_stride); | |
7ca2d3a3 DL |
15149 | } |
15150 | else | |
15151 | { | |
791afaa2 | 15152 | size_t ndim = range_types.size (); |
7ca2d3a3 | 15153 | while (ndim-- > 0) |
dc53a7ad JB |
15154 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
15155 | bit_stride); | |
7ca2d3a3 | 15156 | } |
c906108c | 15157 | |
f5f8a009 EZ |
15158 | /* Understand Dwarf2 support for vector types (like they occur on |
15159 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
15160 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
15161 | custom vendor extension. The main difference between a regular | |
15162 | array and the vector variant is that vectors are passed by value | |
15163 | to functions. */ | |
e142c38c | 15164 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 15165 | if (attr) |
ea37ba09 | 15166 | make_vector_type (type); |
f5f8a009 | 15167 | |
dbc98a8b KW |
15168 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
15169 | implementation may choose to implement triple vectors using this | |
15170 | attribute. */ | |
15171 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
15172 | if (attr) | |
15173 | { | |
15174 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
15175 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15176 | else | |
3e43a32a MS |
15177 | complaint (&symfile_complaints, |
15178 | _("DW_AT_byte_size for array type smaller " | |
15179 | "than the total size of elements")); | |
dbc98a8b KW |
15180 | } |
15181 | ||
39cbfefa DJ |
15182 | name = dwarf2_name (die, cu); |
15183 | if (name) | |
15184 | TYPE_NAME (type) = name; | |
6e70227d | 15185 | |
0963b4bd | 15186 | /* Install the type in the die. */ |
7e314c57 JK |
15187 | set_die_type (die, type, cu); |
15188 | ||
15189 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15190 | set_descriptive_type (type, die, cu); |
15191 | ||
7e314c57 | 15192 | return type; |
c906108c SS |
15193 | } |
15194 | ||
7ca2d3a3 | 15195 | static enum dwarf_array_dim_ordering |
6e70227d | 15196 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
15197 | { |
15198 | struct attribute *attr; | |
15199 | ||
15200 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
15201 | ||
aead7601 SM |
15202 | if (attr) |
15203 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 15204 | |
0963b4bd MS |
15205 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
15206 | opposite order to the dwarf2 specification, but data is still | |
15207 | laid out as per normal fortran. | |
7ca2d3a3 | 15208 | |
0963b4bd MS |
15209 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
15210 | version checking. */ | |
7ca2d3a3 | 15211 | |
905e0470 PM |
15212 | if (cu->language == language_fortran |
15213 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
15214 | { |
15215 | return DW_ORD_row_major; | |
15216 | } | |
15217 | ||
6e70227d | 15218 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
15219 | { |
15220 | case array_column_major: | |
15221 | return DW_ORD_col_major; | |
15222 | case array_row_major: | |
15223 | default: | |
15224 | return DW_ORD_row_major; | |
15225 | }; | |
15226 | } | |
15227 | ||
72019c9c | 15228 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 15229 | the DIE's type field. */ |
72019c9c | 15230 | |
f792889a | 15231 | static struct type * |
72019c9c GM |
15232 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
15233 | { | |
7e314c57 JK |
15234 | struct type *domain_type, *set_type; |
15235 | struct attribute *attr; | |
f792889a | 15236 | |
7e314c57 JK |
15237 | domain_type = die_type (die, cu); |
15238 | ||
15239 | /* The die_type call above may have already set the type for this DIE. */ | |
15240 | set_type = get_die_type (die, cu); | |
15241 | if (set_type) | |
15242 | return set_type; | |
15243 | ||
15244 | set_type = create_set_type (NULL, domain_type); | |
15245 | ||
15246 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
15247 | if (attr) |
15248 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 15249 | |
f792889a | 15250 | return set_die_type (die, set_type, cu); |
72019c9c | 15251 | } |
7ca2d3a3 | 15252 | |
0971de02 TT |
15253 | /* A helper for read_common_block that creates a locexpr baton. |
15254 | SYM is the symbol which we are marking as computed. | |
15255 | COMMON_DIE is the DIE for the common block. | |
15256 | COMMON_LOC is the location expression attribute for the common | |
15257 | block itself. | |
15258 | MEMBER_LOC is the location expression attribute for the particular | |
15259 | member of the common block that we are processing. | |
15260 | CU is the CU from which the above come. */ | |
15261 | ||
15262 | static void | |
15263 | mark_common_block_symbol_computed (struct symbol *sym, | |
15264 | struct die_info *common_die, | |
15265 | struct attribute *common_loc, | |
15266 | struct attribute *member_loc, | |
15267 | struct dwarf2_cu *cu) | |
15268 | { | |
15269 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
15270 | struct dwarf2_locexpr_baton *baton; | |
15271 | gdb_byte *ptr; | |
15272 | unsigned int cu_off; | |
15273 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
15274 | LONGEST offset = 0; | |
15275 | ||
15276 | gdb_assert (common_loc && member_loc); | |
15277 | gdb_assert (attr_form_is_block (common_loc)); | |
15278 | gdb_assert (attr_form_is_block (member_loc) | |
15279 | || attr_form_is_constant (member_loc)); | |
15280 | ||
8d749320 | 15281 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
15282 | baton->per_cu = cu->per_cu; |
15283 | gdb_assert (baton->per_cu); | |
15284 | ||
15285 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
15286 | ||
15287 | if (attr_form_is_constant (member_loc)) | |
15288 | { | |
15289 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
15290 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
15291 | } | |
15292 | else | |
15293 | baton->size += DW_BLOCK (member_loc)->size; | |
15294 | ||
224c3ddb | 15295 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
15296 | baton->data = ptr; |
15297 | ||
15298 | *ptr++ = DW_OP_call4; | |
9c541725 | 15299 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
15300 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
15301 | ptr += 4; | |
15302 | ||
15303 | if (attr_form_is_constant (member_loc)) | |
15304 | { | |
15305 | *ptr++ = DW_OP_addr; | |
15306 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
15307 | ptr += cu->header.addr_size; | |
15308 | } | |
15309 | else | |
15310 | { | |
15311 | /* We have to copy the data here, because DW_OP_call4 will only | |
15312 | use a DW_AT_location attribute. */ | |
15313 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
15314 | ptr += DW_BLOCK (member_loc)->size; | |
15315 | } | |
15316 | ||
15317 | *ptr++ = DW_OP_plus; | |
15318 | gdb_assert (ptr - baton->data == baton->size); | |
15319 | ||
0971de02 | 15320 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 15321 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
15322 | } |
15323 | ||
4357ac6c TT |
15324 | /* Create appropriate locally-scoped variables for all the |
15325 | DW_TAG_common_block entries. Also create a struct common_block | |
15326 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
15327 | is used to sepate the common blocks name namespace from regular | |
15328 | variable names. */ | |
c906108c SS |
15329 | |
15330 | static void | |
e7c27a73 | 15331 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15332 | { |
0971de02 TT |
15333 | struct attribute *attr; |
15334 | ||
15335 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
15336 | if (attr) | |
15337 | { | |
15338 | /* Support the .debug_loc offsets. */ | |
15339 | if (attr_form_is_block (attr)) | |
15340 | { | |
15341 | /* Ok. */ | |
15342 | } | |
15343 | else if (attr_form_is_section_offset (attr)) | |
15344 | { | |
15345 | dwarf2_complex_location_expr_complaint (); | |
15346 | attr = NULL; | |
15347 | } | |
15348 | else | |
15349 | { | |
15350 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15351 | "common block member"); | |
15352 | attr = NULL; | |
15353 | } | |
15354 | } | |
15355 | ||
639d11d3 | 15356 | if (die->child != NULL) |
c906108c | 15357 | { |
4357ac6c TT |
15358 | struct objfile *objfile = cu->objfile; |
15359 | struct die_info *child_die; | |
15360 | size_t n_entries = 0, size; | |
15361 | struct common_block *common_block; | |
15362 | struct symbol *sym; | |
74ac6d43 | 15363 | |
4357ac6c TT |
15364 | for (child_die = die->child; |
15365 | child_die && child_die->tag; | |
15366 | child_die = sibling_die (child_die)) | |
15367 | ++n_entries; | |
15368 | ||
15369 | size = (sizeof (struct common_block) | |
15370 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
15371 | common_block |
15372 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
15373 | size); | |
4357ac6c TT |
15374 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
15375 | common_block->n_entries = 0; | |
15376 | ||
15377 | for (child_die = die->child; | |
15378 | child_die && child_die->tag; | |
15379 | child_die = sibling_die (child_die)) | |
15380 | { | |
15381 | /* Create the symbol in the DW_TAG_common_block block in the current | |
15382 | symbol scope. */ | |
e7c27a73 | 15383 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
15384 | if (sym != NULL) |
15385 | { | |
15386 | struct attribute *member_loc; | |
15387 | ||
15388 | common_block->contents[common_block->n_entries++] = sym; | |
15389 | ||
15390 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
15391 | cu); | |
15392 | if (member_loc) | |
15393 | { | |
15394 | /* GDB has handled this for a long time, but it is | |
15395 | not specified by DWARF. It seems to have been | |
15396 | emitted by gfortran at least as recently as: | |
15397 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
15398 | complaint (&symfile_complaints, | |
15399 | _("Variable in common block has " | |
15400 | "DW_AT_data_member_location " | |
15401 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15402 | to_underlying (child_die->sect_off), |
4262abfb | 15403 | objfile_name (cu->objfile)); |
0971de02 TT |
15404 | |
15405 | if (attr_form_is_section_offset (member_loc)) | |
15406 | dwarf2_complex_location_expr_complaint (); | |
15407 | else if (attr_form_is_constant (member_loc) | |
15408 | || attr_form_is_block (member_loc)) | |
15409 | { | |
15410 | if (attr) | |
15411 | mark_common_block_symbol_computed (sym, die, attr, | |
15412 | member_loc, cu); | |
15413 | } | |
15414 | else | |
15415 | dwarf2_complex_location_expr_complaint (); | |
15416 | } | |
15417 | } | |
c906108c | 15418 | } |
4357ac6c TT |
15419 | |
15420 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
15421 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
15422 | } |
15423 | } | |
15424 | ||
0114d602 | 15425 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 15426 | |
0114d602 DJ |
15427 | static struct type * |
15428 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 15429 | { |
e7c27a73 | 15430 | struct objfile *objfile = cu->objfile; |
0114d602 | 15431 | const char *previous_prefix, *name; |
9219021c | 15432 | int is_anonymous; |
0114d602 DJ |
15433 | struct type *type; |
15434 | ||
15435 | /* For extensions, reuse the type of the original namespace. */ | |
15436 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
15437 | { | |
15438 | struct die_info *ext_die; | |
15439 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 15440 | |
0114d602 DJ |
15441 | ext_die = dwarf2_extension (die, &ext_cu); |
15442 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
15443 | |
15444 | /* EXT_CU may not be the same as CU. | |
02142a6c | 15445 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
15446 | return set_die_type (die, type, cu); |
15447 | } | |
9219021c | 15448 | |
e142c38c | 15449 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
15450 | |
15451 | /* Now build the name of the current namespace. */ | |
15452 | ||
0114d602 DJ |
15453 | previous_prefix = determine_prefix (die, cu); |
15454 | if (previous_prefix[0] != '\0') | |
15455 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 15456 | previous_prefix, name, 0, cu); |
0114d602 DJ |
15457 | |
15458 | /* Create the type. */ | |
19f392bc | 15459 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
15460 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
15461 | ||
60531b24 | 15462 | return set_die_type (die, type, cu); |
0114d602 DJ |
15463 | } |
15464 | ||
22cee43f | 15465 | /* Read a namespace scope. */ |
0114d602 DJ |
15466 | |
15467 | static void | |
15468 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
15469 | { | |
15470 | struct objfile *objfile = cu->objfile; | |
0114d602 | 15471 | int is_anonymous; |
9219021c | 15472 | |
5c4e30ca DC |
15473 | /* Add a symbol associated to this if we haven't seen the namespace |
15474 | before. Also, add a using directive if it's an anonymous | |
15475 | namespace. */ | |
9219021c | 15476 | |
f2f0e013 | 15477 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
15478 | { |
15479 | struct type *type; | |
15480 | ||
0114d602 | 15481 | type = read_type_die (die, cu); |
e7c27a73 | 15482 | new_symbol (die, type, cu); |
5c4e30ca | 15483 | |
e8e80198 | 15484 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 15485 | if (is_anonymous) |
0114d602 DJ |
15486 | { |
15487 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 15488 | |
eb1e02fd | 15489 | std::vector<const char *> excludes; |
22cee43f PMR |
15490 | add_using_directive (using_directives (cu->language), |
15491 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 15492 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 15493 | } |
5c4e30ca | 15494 | } |
9219021c | 15495 | |
639d11d3 | 15496 | if (die->child != NULL) |
d9fa45fe | 15497 | { |
639d11d3 | 15498 | struct die_info *child_die = die->child; |
6e70227d | 15499 | |
d9fa45fe DC |
15500 | while (child_die && child_die->tag) |
15501 | { | |
e7c27a73 | 15502 | process_die (child_die, cu); |
d9fa45fe DC |
15503 | child_die = sibling_die (child_die); |
15504 | } | |
15505 | } | |
38d518c9 EZ |
15506 | } |
15507 | ||
f55ee35c JK |
15508 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
15509 | imported module. Still we need that type as local Fortran "use ... only" | |
15510 | declaration imports depend on the created type in determine_prefix. */ | |
15511 | ||
15512 | static struct type * | |
15513 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
15514 | { | |
15515 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 15516 | const char *module_name; |
f55ee35c JK |
15517 | struct type *type; |
15518 | ||
15519 | module_name = dwarf2_name (die, cu); | |
15520 | if (!module_name) | |
3e43a32a MS |
15521 | complaint (&symfile_complaints, |
15522 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 15523 | to_underlying (die->sect_off)); |
19f392bc | 15524 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
15525 | |
15526 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
15527 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
15528 | ||
15529 | return set_die_type (die, type, cu); | |
15530 | } | |
15531 | ||
5d7cb8df JK |
15532 | /* Read a Fortran module. */ |
15533 | ||
15534 | static void | |
15535 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
15536 | { | |
15537 | struct die_info *child_die = die->child; | |
530e8392 KB |
15538 | struct type *type; |
15539 | ||
15540 | type = read_type_die (die, cu); | |
15541 | new_symbol (die, type, cu); | |
5d7cb8df | 15542 | |
5d7cb8df JK |
15543 | while (child_die && child_die->tag) |
15544 | { | |
15545 | process_die (child_die, cu); | |
15546 | child_die = sibling_die (child_die); | |
15547 | } | |
15548 | } | |
15549 | ||
38d518c9 EZ |
15550 | /* Return the name of the namespace represented by DIE. Set |
15551 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
15552 | namespace. */ | |
15553 | ||
15554 | static const char * | |
e142c38c | 15555 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
15556 | { |
15557 | struct die_info *current_die; | |
15558 | const char *name = NULL; | |
15559 | ||
15560 | /* Loop through the extensions until we find a name. */ | |
15561 | ||
15562 | for (current_die = die; | |
15563 | current_die != NULL; | |
f2f0e013 | 15564 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 15565 | { |
96553a0c DE |
15566 | /* We don't use dwarf2_name here so that we can detect the absence |
15567 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 15568 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 15569 | |
38d518c9 EZ |
15570 | if (name != NULL) |
15571 | break; | |
15572 | } | |
15573 | ||
15574 | /* Is it an anonymous namespace? */ | |
15575 | ||
15576 | *is_anonymous = (name == NULL); | |
15577 | if (*is_anonymous) | |
2b1dbab0 | 15578 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
15579 | |
15580 | return name; | |
d9fa45fe DC |
15581 | } |
15582 | ||
c906108c SS |
15583 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
15584 | the user defined type vector. */ | |
15585 | ||
f792889a | 15586 | static struct type * |
e7c27a73 | 15587 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15588 | { |
5e2b427d | 15589 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 15590 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 15591 | struct type *type; |
8b2dbe47 KB |
15592 | struct attribute *attr_byte_size; |
15593 | struct attribute *attr_address_class; | |
15594 | int byte_size, addr_class; | |
7e314c57 JK |
15595 | struct type *target_type; |
15596 | ||
15597 | target_type = die_type (die, cu); | |
c906108c | 15598 | |
7e314c57 JK |
15599 | /* The die_type call above may have already set the type for this DIE. */ |
15600 | type = get_die_type (die, cu); | |
15601 | if (type) | |
15602 | return type; | |
15603 | ||
15604 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 15605 | |
e142c38c | 15606 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
15607 | if (attr_byte_size) |
15608 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 15609 | else |
8b2dbe47 KB |
15610 | byte_size = cu_header->addr_size; |
15611 | ||
e142c38c | 15612 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
15613 | if (attr_address_class) |
15614 | addr_class = DW_UNSND (attr_address_class); | |
15615 | else | |
15616 | addr_class = DW_ADDR_none; | |
15617 | ||
15618 | /* If the pointer size or address class is different than the | |
15619 | default, create a type variant marked as such and set the | |
15620 | length accordingly. */ | |
15621 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 15622 | { |
5e2b427d | 15623 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
15624 | { |
15625 | int type_flags; | |
15626 | ||
849957d9 | 15627 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 15628 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
15629 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
15630 | == 0); | |
8b2dbe47 KB |
15631 | type = make_type_with_address_space (type, type_flags); |
15632 | } | |
15633 | else if (TYPE_LENGTH (type) != byte_size) | |
15634 | { | |
3e43a32a MS |
15635 | complaint (&symfile_complaints, |
15636 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 15637 | } |
6e70227d | 15638 | else |
9a619af0 MS |
15639 | { |
15640 | /* Should we also complain about unhandled address classes? */ | |
15641 | } | |
c906108c | 15642 | } |
8b2dbe47 KB |
15643 | |
15644 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 15645 | return set_die_type (die, type, cu); |
c906108c SS |
15646 | } |
15647 | ||
15648 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
15649 | the user defined type vector. */ | |
15650 | ||
f792889a | 15651 | static struct type * |
e7c27a73 | 15652 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
15653 | { |
15654 | struct type *type; | |
15655 | struct type *to_type; | |
15656 | struct type *domain; | |
15657 | ||
e7c27a73 DJ |
15658 | to_type = die_type (die, cu); |
15659 | domain = die_containing_type (die, cu); | |
0d5de010 | 15660 | |
7e314c57 JK |
15661 | /* The calls above may have already set the type for this DIE. */ |
15662 | type = get_die_type (die, cu); | |
15663 | if (type) | |
15664 | return type; | |
15665 | ||
0d5de010 DJ |
15666 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
15667 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
15668 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
15669 | { | |
15670 | struct type *new_type = alloc_type (cu->objfile); | |
15671 | ||
15672 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
15673 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
15674 | TYPE_VARARGS (to_type)); | |
15675 | type = lookup_methodptr_type (new_type); | |
15676 | } | |
0d5de010 DJ |
15677 | else |
15678 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 15679 | |
f792889a | 15680 | return set_die_type (die, type, cu); |
c906108c SS |
15681 | } |
15682 | ||
4297a3f0 | 15683 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
15684 | the user defined type vector. */ |
15685 | ||
f792889a | 15686 | static struct type * |
4297a3f0 AV |
15687 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
15688 | enum type_code refcode) | |
c906108c | 15689 | { |
e7c27a73 | 15690 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 15691 | struct type *type, *target_type; |
c906108c SS |
15692 | struct attribute *attr; |
15693 | ||
4297a3f0 AV |
15694 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
15695 | ||
7e314c57 JK |
15696 | target_type = die_type (die, cu); |
15697 | ||
15698 | /* The die_type call above may have already set the type for this DIE. */ | |
15699 | type = get_die_type (die, cu); | |
15700 | if (type) | |
15701 | return type; | |
15702 | ||
4297a3f0 | 15703 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 15704 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15705 | if (attr) |
15706 | { | |
15707 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15708 | } | |
15709 | else | |
15710 | { | |
107d2387 | 15711 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 15712 | } |
f792889a | 15713 | return set_die_type (die, type, cu); |
c906108c SS |
15714 | } |
15715 | ||
cf363f18 MW |
15716 | /* Add the given cv-qualifiers to the element type of the array. GCC |
15717 | outputs DWARF type qualifiers that apply to an array, not the | |
15718 | element type. But GDB relies on the array element type to carry | |
15719 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
15720 | specification. */ | |
15721 | ||
15722 | static struct type * | |
15723 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
15724 | struct type *base_type, int cnst, int voltl) | |
15725 | { | |
15726 | struct type *el_type, *inner_array; | |
15727 | ||
15728 | base_type = copy_type (base_type); | |
15729 | inner_array = base_type; | |
15730 | ||
15731 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
15732 | { | |
15733 | TYPE_TARGET_TYPE (inner_array) = | |
15734 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
15735 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
15736 | } | |
15737 | ||
15738 | el_type = TYPE_TARGET_TYPE (inner_array); | |
15739 | cnst |= TYPE_CONST (el_type); | |
15740 | voltl |= TYPE_VOLATILE (el_type); | |
15741 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
15742 | ||
15743 | return set_die_type (die, base_type, cu); | |
15744 | } | |
15745 | ||
f792889a | 15746 | static struct type * |
e7c27a73 | 15747 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15748 | { |
f792889a | 15749 | struct type *base_type, *cv_type; |
c906108c | 15750 | |
e7c27a73 | 15751 | base_type = die_type (die, cu); |
7e314c57 JK |
15752 | |
15753 | /* The die_type call above may have already set the type for this DIE. */ | |
15754 | cv_type = get_die_type (die, cu); | |
15755 | if (cv_type) | |
15756 | return cv_type; | |
15757 | ||
2f608a3a KW |
15758 | /* In case the const qualifier is applied to an array type, the element type |
15759 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
15760 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 15761 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 15762 | |
f792889a DJ |
15763 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
15764 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15765 | } |
15766 | ||
f792889a | 15767 | static struct type * |
e7c27a73 | 15768 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15769 | { |
f792889a | 15770 | struct type *base_type, *cv_type; |
c906108c | 15771 | |
e7c27a73 | 15772 | base_type = die_type (die, cu); |
7e314c57 JK |
15773 | |
15774 | /* The die_type call above may have already set the type for this DIE. */ | |
15775 | cv_type = get_die_type (die, cu); | |
15776 | if (cv_type) | |
15777 | return cv_type; | |
15778 | ||
cf363f18 MW |
15779 | /* In case the volatile qualifier is applied to an array type, the |
15780 | element type is so qualified, not the array type (section 6.7.3 | |
15781 | of C99). */ | |
15782 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
15783 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
15784 | ||
f792889a DJ |
15785 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
15786 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15787 | } |
15788 | ||
06d66ee9 TT |
15789 | /* Handle DW_TAG_restrict_type. */ |
15790 | ||
15791 | static struct type * | |
15792 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
15793 | { | |
15794 | struct type *base_type, *cv_type; | |
15795 | ||
15796 | base_type = die_type (die, cu); | |
15797 | ||
15798 | /* The die_type call above may have already set the type for this DIE. */ | |
15799 | cv_type = get_die_type (die, cu); | |
15800 | if (cv_type) | |
15801 | return cv_type; | |
15802 | ||
15803 | cv_type = make_restrict_type (base_type); | |
15804 | return set_die_type (die, cv_type, cu); | |
15805 | } | |
15806 | ||
a2c2acaf MW |
15807 | /* Handle DW_TAG_atomic_type. */ |
15808 | ||
15809 | static struct type * | |
15810 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
15811 | { | |
15812 | struct type *base_type, *cv_type; | |
15813 | ||
15814 | base_type = die_type (die, cu); | |
15815 | ||
15816 | /* The die_type call above may have already set the type for this DIE. */ | |
15817 | cv_type = get_die_type (die, cu); | |
15818 | if (cv_type) | |
15819 | return cv_type; | |
15820 | ||
15821 | cv_type = make_atomic_type (base_type); | |
15822 | return set_die_type (die, cv_type, cu); | |
15823 | } | |
15824 | ||
c906108c SS |
15825 | /* Extract all information from a DW_TAG_string_type DIE and add to |
15826 | the user defined type vector. It isn't really a user defined type, | |
15827 | but it behaves like one, with other DIE's using an AT_user_def_type | |
15828 | attribute to reference it. */ | |
15829 | ||
f792889a | 15830 | static struct type * |
e7c27a73 | 15831 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15832 | { |
e7c27a73 | 15833 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 15834 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15835 | struct type *type, *range_type, *index_type, *char_type; |
15836 | struct attribute *attr; | |
15837 | unsigned int length; | |
15838 | ||
e142c38c | 15839 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
15840 | if (attr) |
15841 | { | |
15842 | length = DW_UNSND (attr); | |
15843 | } | |
15844 | else | |
15845 | { | |
0963b4bd | 15846 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 15847 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
15848 | if (attr) |
15849 | { | |
15850 | length = DW_UNSND (attr); | |
15851 | } | |
15852 | else | |
15853 | { | |
15854 | length = 1; | |
15855 | } | |
c906108c | 15856 | } |
6ccb9162 | 15857 | |
46bf5051 | 15858 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15859 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
15860 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
15861 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 15862 | |
f792889a | 15863 | return set_die_type (die, type, cu); |
c906108c SS |
15864 | } |
15865 | ||
4d804846 JB |
15866 | /* Assuming that DIE corresponds to a function, returns nonzero |
15867 | if the function is prototyped. */ | |
15868 | ||
15869 | static int | |
15870 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
15871 | { | |
15872 | struct attribute *attr; | |
15873 | ||
15874 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
15875 | if (attr && (DW_UNSND (attr) != 0)) | |
15876 | return 1; | |
15877 | ||
15878 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
15879 | is only meaninful for C, but the concept also extends to other | |
15880 | languages that allow unprototyped functions (Eg: Objective C). | |
15881 | For all other languages, assume that functions are always | |
15882 | prototyped. */ | |
15883 | if (cu->language != language_c | |
15884 | && cu->language != language_objc | |
15885 | && cu->language != language_opencl) | |
15886 | return 1; | |
15887 | ||
15888 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
15889 | prototyped and unprototyped functions; default to prototyped, | |
15890 | since that is more common in modern code (and RealView warns | |
15891 | about unprototyped functions). */ | |
15892 | if (producer_is_realview (cu->producer)) | |
15893 | return 1; | |
15894 | ||
15895 | return 0; | |
15896 | } | |
15897 | ||
c906108c SS |
15898 | /* Handle DIES due to C code like: |
15899 | ||
15900 | struct foo | |
c5aa993b JM |
15901 | { |
15902 | int (*funcp)(int a, long l); | |
15903 | int b; | |
15904 | }; | |
c906108c | 15905 | |
0963b4bd | 15906 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 15907 | |
f792889a | 15908 | static struct type * |
e7c27a73 | 15909 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15910 | { |
bb5ed363 | 15911 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
15912 | struct type *type; /* Type that this function returns. */ |
15913 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
15914 | struct attribute *attr; |
15915 | ||
e7c27a73 | 15916 | type = die_type (die, cu); |
7e314c57 JK |
15917 | |
15918 | /* The die_type call above may have already set the type for this DIE. */ | |
15919 | ftype = get_die_type (die, cu); | |
15920 | if (ftype) | |
15921 | return ftype; | |
15922 | ||
0c8b41f1 | 15923 | ftype = lookup_function_type (type); |
c906108c | 15924 | |
4d804846 | 15925 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15926 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15927 | |
c055b101 CV |
15928 | /* Store the calling convention in the type if it's available in |
15929 | the subroutine die. Otherwise set the calling convention to | |
15930 | the default value DW_CC_normal. */ | |
15931 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15932 | if (attr) |
15933 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15934 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15935 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15936 | else | |
15937 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15938 | |
743649fd MW |
15939 | /* Record whether the function returns normally to its caller or not |
15940 | if the DWARF producer set that information. */ | |
15941 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15942 | if (attr && (DW_UNSND (attr) != 0)) | |
15943 | TYPE_NO_RETURN (ftype) = 1; | |
15944 | ||
76c10ea2 GM |
15945 | /* We need to add the subroutine type to the die immediately so |
15946 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15947 | declared as the same subroutine type. */ |
76c10ea2 | 15948 | set_die_type (die, ftype, cu); |
6e70227d | 15949 | |
639d11d3 | 15950 | if (die->child != NULL) |
c906108c | 15951 | { |
bb5ed363 | 15952 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15953 | struct die_info *child_die; |
8072405b | 15954 | int nparams, iparams; |
c906108c SS |
15955 | |
15956 | /* Count the number of parameters. | |
15957 | FIXME: GDB currently ignores vararg functions, but knows about | |
15958 | vararg member functions. */ | |
8072405b | 15959 | nparams = 0; |
639d11d3 | 15960 | child_die = die->child; |
c906108c SS |
15961 | while (child_die && child_die->tag) |
15962 | { | |
15963 | if (child_die->tag == DW_TAG_formal_parameter) | |
15964 | nparams++; | |
15965 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15966 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15967 | child_die = sibling_die (child_die); |
15968 | } | |
15969 | ||
15970 | /* Allocate storage for parameters and fill them in. */ | |
15971 | TYPE_NFIELDS (ftype) = nparams; | |
15972 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15973 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15974 | |
8072405b JK |
15975 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15976 | even if we error out during the parameters reading below. */ | |
15977 | for (iparams = 0; iparams < nparams; iparams++) | |
15978 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15979 | ||
15980 | iparams = 0; | |
639d11d3 | 15981 | child_die = die->child; |
c906108c SS |
15982 | while (child_die && child_die->tag) |
15983 | { | |
15984 | if (child_die->tag == DW_TAG_formal_parameter) | |
15985 | { | |
3ce3b1ba PA |
15986 | struct type *arg_type; |
15987 | ||
15988 | /* DWARF version 2 has no clean way to discern C++ | |
15989 | static and non-static member functions. G++ helps | |
15990 | GDB by marking the first parameter for non-static | |
15991 | member functions (which is the this pointer) as | |
15992 | artificial. We pass this information to | |
15993 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15994 | ||
15995 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15996 | 4.5 does not yet generate. */ | |
e142c38c | 15997 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15998 | if (attr) |
15999 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
16000 | else | |
9c37b5ae | 16001 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
16002 | arg_type = die_type (child_die, cu); |
16003 | ||
16004 | /* RealView does not mark THIS as const, which the testsuite | |
16005 | expects. GCC marks THIS as const in method definitions, | |
16006 | but not in the class specifications (GCC PR 43053). */ | |
16007 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
16008 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
16009 | { | |
16010 | int is_this = 0; | |
16011 | struct dwarf2_cu *arg_cu = cu; | |
16012 | const char *name = dwarf2_name (child_die, cu); | |
16013 | ||
16014 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
16015 | if (attr) | |
16016 | { | |
16017 | /* If the compiler emits this, use it. */ | |
16018 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
16019 | is_this = 1; | |
16020 | } | |
16021 | else if (name && strcmp (name, "this") == 0) | |
16022 | /* Function definitions will have the argument names. */ | |
16023 | is_this = 1; | |
16024 | else if (name == NULL && iparams == 0) | |
16025 | /* Declarations may not have the names, so like | |
16026 | elsewhere in GDB, assume an artificial first | |
16027 | argument is "this". */ | |
16028 | is_this = 1; | |
16029 | ||
16030 | if (is_this) | |
16031 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
16032 | arg_type, 0); | |
16033 | } | |
16034 | ||
16035 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
16036 | iparams++; |
16037 | } | |
16038 | child_die = sibling_die (child_die); | |
16039 | } | |
16040 | } | |
16041 | ||
76c10ea2 | 16042 | return ftype; |
c906108c SS |
16043 | } |
16044 | ||
f792889a | 16045 | static struct type * |
e7c27a73 | 16046 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16047 | { |
e7c27a73 | 16048 | struct objfile *objfile = cu->objfile; |
0114d602 | 16049 | const char *name = NULL; |
3c8e0968 | 16050 | struct type *this_type, *target_type; |
c906108c | 16051 | |
94af9270 | 16052 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
16053 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
16054 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 16055 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
16056 | target_type = die_type (die, cu); |
16057 | if (target_type != this_type) | |
16058 | TYPE_TARGET_TYPE (this_type) = target_type; | |
16059 | else | |
16060 | { | |
16061 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
16062 | spec and cause infinite loops in GDB. */ | |
16063 | complaint (&symfile_complaints, | |
16064 | _("Self-referential DW_TAG_typedef " | |
16065 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16066 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
16067 | TYPE_TARGET_TYPE (this_type) = NULL; |
16068 | } | |
f792889a | 16069 | return this_type; |
c906108c SS |
16070 | } |
16071 | ||
9b790ce7 UW |
16072 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
16073 | (which may be different from NAME) to the architecture back-end to allow | |
16074 | it to guess the correct format if necessary. */ | |
16075 | ||
16076 | static struct type * | |
16077 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
16078 | const char *name_hint) | |
16079 | { | |
16080 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16081 | const struct floatformat **format; | |
16082 | struct type *type; | |
16083 | ||
16084 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
16085 | if (format) | |
16086 | type = init_float_type (objfile, bits, name, format); | |
16087 | else | |
77b7c781 | 16088 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
16089 | |
16090 | return type; | |
16091 | } | |
16092 | ||
c906108c SS |
16093 | /* Find a representation of a given base type and install |
16094 | it in the TYPE field of the die. */ | |
16095 | ||
f792889a | 16096 | static struct type * |
e7c27a73 | 16097 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16098 | { |
e7c27a73 | 16099 | struct objfile *objfile = cu->objfile; |
c906108c SS |
16100 | struct type *type; |
16101 | struct attribute *attr; | |
19f392bc | 16102 | int encoding = 0, bits = 0; |
15d034d0 | 16103 | const char *name; |
c906108c | 16104 | |
e142c38c | 16105 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
16106 | if (attr) |
16107 | { | |
16108 | encoding = DW_UNSND (attr); | |
16109 | } | |
e142c38c | 16110 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16111 | if (attr) |
16112 | { | |
19f392bc | 16113 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 16114 | } |
39cbfefa | 16115 | name = dwarf2_name (die, cu); |
6ccb9162 | 16116 | if (!name) |
c906108c | 16117 | { |
6ccb9162 UW |
16118 | complaint (&symfile_complaints, |
16119 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 16120 | } |
6ccb9162 UW |
16121 | |
16122 | switch (encoding) | |
c906108c | 16123 | { |
6ccb9162 UW |
16124 | case DW_ATE_address: |
16125 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 16126 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 16127 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
16128 | break; |
16129 | case DW_ATE_boolean: | |
19f392bc | 16130 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
16131 | break; |
16132 | case DW_ATE_complex_float: | |
9b790ce7 | 16133 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 16134 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
16135 | break; |
16136 | case DW_ATE_decimal_float: | |
19f392bc | 16137 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
16138 | break; |
16139 | case DW_ATE_float: | |
9b790ce7 | 16140 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
16141 | break; |
16142 | case DW_ATE_signed: | |
19f392bc | 16143 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
16144 | break; |
16145 | case DW_ATE_unsigned: | |
3b2b8fea TT |
16146 | if (cu->language == language_fortran |
16147 | && name | |
61012eef | 16148 | && startswith (name, "character(")) |
19f392bc UW |
16149 | type = init_character_type (objfile, bits, 1, name); |
16150 | else | |
16151 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
16152 | break; |
16153 | case DW_ATE_signed_char: | |
6e70227d | 16154 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
16155 | || cu->language == language_pascal |
16156 | || cu->language == language_fortran) | |
19f392bc UW |
16157 | type = init_character_type (objfile, bits, 0, name); |
16158 | else | |
16159 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
16160 | break; |
16161 | case DW_ATE_unsigned_char: | |
868a0084 | 16162 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 16163 | || cu->language == language_pascal |
c44af4eb TT |
16164 | || cu->language == language_fortran |
16165 | || cu->language == language_rust) | |
19f392bc UW |
16166 | type = init_character_type (objfile, bits, 1, name); |
16167 | else | |
16168 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 16169 | break; |
75079b2b | 16170 | case DW_ATE_UTF: |
53e710ac PA |
16171 | { |
16172 | gdbarch *arch = get_objfile_arch (objfile); | |
16173 | ||
16174 | if (bits == 16) | |
16175 | type = builtin_type (arch)->builtin_char16; | |
16176 | else if (bits == 32) | |
16177 | type = builtin_type (arch)->builtin_char32; | |
16178 | else | |
16179 | { | |
16180 | complaint (&symfile_complaints, | |
16181 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
16182 | bits); | |
16183 | type = init_integer_type (objfile, bits, 1, name); | |
16184 | } | |
16185 | return set_die_type (die, type, cu); | |
16186 | } | |
75079b2b TT |
16187 | break; |
16188 | ||
6ccb9162 UW |
16189 | default: |
16190 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
16191 | dwarf_type_encoding_name (encoding)); | |
77b7c781 | 16192 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 16193 | break; |
c906108c | 16194 | } |
6ccb9162 | 16195 | |
0114d602 | 16196 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 16197 | TYPE_NOSIGN (type) = 1; |
0114d602 | 16198 | |
f792889a | 16199 | return set_die_type (die, type, cu); |
c906108c SS |
16200 | } |
16201 | ||
80180f79 SA |
16202 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
16203 | resulting value of the attribute into struct bound_prop. | |
16204 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
16205 | ||
16206 | static int | |
16207 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
16208 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
16209 | { | |
16210 | struct dwarf2_property_baton *baton; | |
16211 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
16212 | ||
16213 | if (attr == NULL || prop == NULL) | |
16214 | return 0; | |
16215 | ||
16216 | if (attr_form_is_block (attr)) | |
16217 | { | |
8d749320 | 16218 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
16219 | baton->referenced_type = NULL; |
16220 | baton->locexpr.per_cu = cu->per_cu; | |
16221 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
16222 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
16223 | prop->data.baton = baton; | |
16224 | prop->kind = PROP_LOCEXPR; | |
16225 | gdb_assert (prop->data.baton != NULL); | |
16226 | } | |
16227 | else if (attr_form_is_ref (attr)) | |
16228 | { | |
16229 | struct dwarf2_cu *target_cu = cu; | |
16230 | struct die_info *target_die; | |
16231 | struct attribute *target_attr; | |
16232 | ||
16233 | target_die = follow_die_ref (die, attr, &target_cu); | |
16234 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
16235 | if (target_attr == NULL) |
16236 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
16237 | target_cu); | |
80180f79 SA |
16238 | if (target_attr == NULL) |
16239 | return 0; | |
16240 | ||
df25ebbd | 16241 | switch (target_attr->name) |
80180f79 | 16242 | { |
df25ebbd JB |
16243 | case DW_AT_location: |
16244 | if (attr_form_is_section_offset (target_attr)) | |
16245 | { | |
8d749320 | 16246 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
16247 | baton->referenced_type = die_type (target_die, target_cu); |
16248 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
16249 | prop->data.baton = baton; | |
16250 | prop->kind = PROP_LOCLIST; | |
16251 | gdb_assert (prop->data.baton != NULL); | |
16252 | } | |
16253 | else if (attr_form_is_block (target_attr)) | |
16254 | { | |
8d749320 | 16255 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
16256 | baton->referenced_type = die_type (target_die, target_cu); |
16257 | baton->locexpr.per_cu = cu->per_cu; | |
16258 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
16259 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
16260 | prop->data.baton = baton; | |
16261 | prop->kind = PROP_LOCEXPR; | |
16262 | gdb_assert (prop->data.baton != NULL); | |
16263 | } | |
16264 | else | |
16265 | { | |
16266 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16267 | "dynamic property"); | |
16268 | return 0; | |
16269 | } | |
16270 | break; | |
16271 | case DW_AT_data_member_location: | |
16272 | { | |
16273 | LONGEST offset; | |
16274 | ||
16275 | if (!handle_data_member_location (target_die, target_cu, | |
16276 | &offset)) | |
16277 | return 0; | |
16278 | ||
8d749320 | 16279 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
16280 | baton->referenced_type = read_type_die (target_die->parent, |
16281 | target_cu); | |
df25ebbd JB |
16282 | baton->offset_info.offset = offset; |
16283 | baton->offset_info.type = die_type (target_die, target_cu); | |
16284 | prop->data.baton = baton; | |
16285 | prop->kind = PROP_ADDR_OFFSET; | |
16286 | break; | |
16287 | } | |
80180f79 SA |
16288 | } |
16289 | } | |
16290 | else if (attr_form_is_constant (attr)) | |
16291 | { | |
16292 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
16293 | prop->kind = PROP_CONST; | |
16294 | } | |
16295 | else | |
16296 | { | |
16297 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
16298 | dwarf2_name (die, cu)); | |
16299 | return 0; | |
16300 | } | |
16301 | ||
16302 | return 1; | |
16303 | } | |
16304 | ||
a02abb62 JB |
16305 | /* Read the given DW_AT_subrange DIE. */ |
16306 | ||
f792889a | 16307 | static struct type * |
a02abb62 JB |
16308 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
16309 | { | |
4c9ad8c2 | 16310 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
16311 | struct type *range_type; |
16312 | struct attribute *attr; | |
729efb13 | 16313 | struct dynamic_prop low, high; |
4fae6e18 | 16314 | int low_default_is_valid; |
c451ebe5 | 16315 | int high_bound_is_count = 0; |
15d034d0 | 16316 | const char *name; |
43bbcdc2 | 16317 | LONGEST negative_mask; |
e77813c8 | 16318 | |
4c9ad8c2 TT |
16319 | orig_base_type = die_type (die, cu); |
16320 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
16321 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
16322 | creating the range type, but we use the result of check_typedef | |
16323 | when examining properties of the type. */ | |
16324 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 16325 | |
7e314c57 JK |
16326 | /* The die_type call above may have already set the type for this DIE. */ |
16327 | range_type = get_die_type (die, cu); | |
16328 | if (range_type) | |
16329 | return range_type; | |
16330 | ||
729efb13 SA |
16331 | low.kind = PROP_CONST; |
16332 | high.kind = PROP_CONST; | |
16333 | high.data.const_val = 0; | |
16334 | ||
4fae6e18 JK |
16335 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
16336 | omitting DW_AT_lower_bound. */ | |
16337 | switch (cu->language) | |
6e70227d | 16338 | { |
4fae6e18 JK |
16339 | case language_c: |
16340 | case language_cplus: | |
729efb13 | 16341 | low.data.const_val = 0; |
4fae6e18 JK |
16342 | low_default_is_valid = 1; |
16343 | break; | |
16344 | case language_fortran: | |
729efb13 | 16345 | low.data.const_val = 1; |
4fae6e18 JK |
16346 | low_default_is_valid = 1; |
16347 | break; | |
16348 | case language_d: | |
4fae6e18 | 16349 | case language_objc: |
c44af4eb | 16350 | case language_rust: |
729efb13 | 16351 | low.data.const_val = 0; |
4fae6e18 JK |
16352 | low_default_is_valid = (cu->header.version >= 4); |
16353 | break; | |
16354 | case language_ada: | |
16355 | case language_m2: | |
16356 | case language_pascal: | |
729efb13 | 16357 | low.data.const_val = 1; |
4fae6e18 JK |
16358 | low_default_is_valid = (cu->header.version >= 4); |
16359 | break; | |
16360 | default: | |
729efb13 | 16361 | low.data.const_val = 0; |
4fae6e18 JK |
16362 | low_default_is_valid = 0; |
16363 | break; | |
a02abb62 JB |
16364 | } |
16365 | ||
e142c38c | 16366 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 16367 | if (attr) |
11c1ba78 | 16368 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
16369 | else if (!low_default_is_valid) |
16370 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
16371 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16372 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 16373 | |
e142c38c | 16374 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 16375 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
16376 | { |
16377 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 16378 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 16379 | { |
c451ebe5 SA |
16380 | /* If bounds are constant do the final calculation here. */ |
16381 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
16382 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
16383 | else | |
16384 | high_bound_is_count = 1; | |
c2ff108b | 16385 | } |
e77813c8 PM |
16386 | } |
16387 | ||
16388 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
16389 | without specifying a base type. | |
16390 | In that case, the base type must be set to the type of | |
16391 | the lower bound, upper bound or count, in that order, if any of these | |
16392 | three attributes references an object that has a type. | |
16393 | If no base type is found, the Dwarf-2 specifications say that | |
16394 | a signed integer type of size equal to the size of an address should | |
16395 | be used. | |
16396 | For the following C code: `extern char gdb_int [];' | |
16397 | GCC produces an empty range DIE. | |
16398 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 16399 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
16400 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
16401 | { | |
16402 | struct objfile *objfile = cu->objfile; | |
16403 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16404 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
16405 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
16406 | ||
16407 | /* Test "int", "long int", and "long long int" objfile types, | |
16408 | and select the first one having a size above or equal to the | |
16409 | architecture address size. */ | |
16410 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16411 | base_type = int_type; | |
16412 | else | |
16413 | { | |
16414 | int_type = objfile_type (objfile)->builtin_long; | |
16415 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16416 | base_type = int_type; | |
16417 | else | |
16418 | { | |
16419 | int_type = objfile_type (objfile)->builtin_long_long; | |
16420 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16421 | base_type = int_type; | |
16422 | } | |
16423 | } | |
16424 | } | |
a02abb62 | 16425 | |
dbb9c2b1 JB |
16426 | /* Normally, the DWARF producers are expected to use a signed |
16427 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
16428 | But this is unfortunately not always the case, as witnessed | |
16429 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
16430 | is used instead. To work around that ambiguity, we treat | |
16431 | the bounds as signed, and thus sign-extend their values, when | |
16432 | the base type is signed. */ | |
6e70227d | 16433 | negative_mask = |
66c6502d | 16434 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
16435 | if (low.kind == PROP_CONST |
16436 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
16437 | low.data.const_val |= negative_mask; | |
16438 | if (high.kind == PROP_CONST | |
16439 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
16440 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 16441 | |
729efb13 | 16442 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 16443 | |
c451ebe5 SA |
16444 | if (high_bound_is_count) |
16445 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
16446 | ||
c2ff108b JK |
16447 | /* Ada expects an empty array on no boundary attributes. */ |
16448 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 16449 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 16450 | |
39cbfefa DJ |
16451 | name = dwarf2_name (die, cu); |
16452 | if (name) | |
16453 | TYPE_NAME (range_type) = name; | |
6e70227d | 16454 | |
e142c38c | 16455 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
16456 | if (attr) |
16457 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
16458 | ||
7e314c57 JK |
16459 | set_die_type (die, range_type, cu); |
16460 | ||
16461 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16462 | set_descriptive_type (range_type, die, cu); |
16463 | ||
7e314c57 | 16464 | return range_type; |
a02abb62 | 16465 | } |
6e70227d | 16466 | |
f792889a | 16467 | static struct type * |
81a17f79 JB |
16468 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
16469 | { | |
16470 | struct type *type; | |
81a17f79 | 16471 | |
81a17f79 JB |
16472 | /* For now, we only support the C meaning of an unspecified type: void. */ |
16473 | ||
19f392bc | 16474 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 16475 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 16476 | |
f792889a | 16477 | return set_die_type (die, type, cu); |
81a17f79 | 16478 | } |
a02abb62 | 16479 | |
639d11d3 DC |
16480 | /* Read a single die and all its descendents. Set the die's sibling |
16481 | field to NULL; set other fields in the die correctly, and set all | |
16482 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
16483 | location of the info_ptr after reading all of those dies. PARENT | |
16484 | is the parent of the die in question. */ | |
16485 | ||
16486 | static struct die_info * | |
dee91e82 | 16487 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
16488 | const gdb_byte *info_ptr, |
16489 | const gdb_byte **new_info_ptr, | |
dee91e82 | 16490 | struct die_info *parent) |
639d11d3 DC |
16491 | { |
16492 | struct die_info *die; | |
d521ce57 | 16493 | const gdb_byte *cur_ptr; |
639d11d3 DC |
16494 | int has_children; |
16495 | ||
bf6af496 | 16496 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
16497 | if (die == NULL) |
16498 | { | |
16499 | *new_info_ptr = cur_ptr; | |
16500 | return NULL; | |
16501 | } | |
93311388 | 16502 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
16503 | |
16504 | if (has_children) | |
bf6af496 | 16505 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
16506 | else |
16507 | { | |
16508 | die->child = NULL; | |
16509 | *new_info_ptr = cur_ptr; | |
16510 | } | |
16511 | ||
16512 | die->sibling = NULL; | |
16513 | die->parent = parent; | |
16514 | return die; | |
16515 | } | |
16516 | ||
16517 | /* Read a die, all of its descendents, and all of its siblings; set | |
16518 | all of the fields of all of the dies correctly. Arguments are as | |
16519 | in read_die_and_children. */ | |
16520 | ||
16521 | static struct die_info * | |
bf6af496 | 16522 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
16523 | const gdb_byte *info_ptr, |
16524 | const gdb_byte **new_info_ptr, | |
bf6af496 | 16525 | struct die_info *parent) |
639d11d3 DC |
16526 | { |
16527 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 16528 | const gdb_byte *cur_ptr; |
639d11d3 | 16529 | |
c906108c | 16530 | cur_ptr = info_ptr; |
639d11d3 DC |
16531 | first_die = last_sibling = NULL; |
16532 | ||
16533 | while (1) | |
c906108c | 16534 | { |
639d11d3 | 16535 | struct die_info *die |
dee91e82 | 16536 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 16537 | |
1d325ec1 | 16538 | if (die == NULL) |
c906108c | 16539 | { |
639d11d3 DC |
16540 | *new_info_ptr = cur_ptr; |
16541 | return first_die; | |
c906108c | 16542 | } |
1d325ec1 DJ |
16543 | |
16544 | if (!first_die) | |
16545 | first_die = die; | |
c906108c | 16546 | else |
1d325ec1 DJ |
16547 | last_sibling->sibling = die; |
16548 | ||
16549 | last_sibling = die; | |
c906108c | 16550 | } |
c906108c SS |
16551 | } |
16552 | ||
bf6af496 DE |
16553 | /* Read a die, all of its descendents, and all of its siblings; set |
16554 | all of the fields of all of the dies correctly. Arguments are as | |
16555 | in read_die_and_children. | |
16556 | This the main entry point for reading a DIE and all its children. */ | |
16557 | ||
16558 | static struct die_info * | |
16559 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
16560 | const gdb_byte *info_ptr, |
16561 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
16562 | struct die_info *parent) |
16563 | { | |
16564 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
16565 | new_info_ptr, parent); | |
16566 | ||
b4f54984 | 16567 | if (dwarf_die_debug) |
bf6af496 DE |
16568 | { |
16569 | fprintf_unfiltered (gdb_stdlog, | |
16570 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16571 | get_section_name (reader->die_section), |
bf6af496 DE |
16572 | (unsigned) (info_ptr - reader->die_section->buffer), |
16573 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16574 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
16575 | } |
16576 | ||
16577 | return die; | |
16578 | } | |
16579 | ||
3019eac3 DE |
16580 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
16581 | attributes. | |
16582 | The caller is responsible for filling in the extra attributes | |
16583 | and updating (*DIEP)->num_attrs. | |
16584 | Set DIEP to point to a newly allocated die with its information, | |
16585 | except for its child, sibling, and parent fields. | |
16586 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 16587 | |
d521ce57 | 16588 | static const gdb_byte * |
3019eac3 | 16589 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 16590 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 16591 | int *has_children, int num_extra_attrs) |
93311388 | 16592 | { |
b64f50a1 | 16593 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
16594 | struct abbrev_info *abbrev; |
16595 | struct die_info *die; | |
16596 | struct dwarf2_cu *cu = reader->cu; | |
16597 | bfd *abfd = reader->abfd; | |
16598 | ||
9c541725 | 16599 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
16600 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16601 | info_ptr += bytes_read; | |
16602 | if (!abbrev_number) | |
16603 | { | |
16604 | *diep = NULL; | |
16605 | *has_children = 0; | |
16606 | return info_ptr; | |
16607 | } | |
16608 | ||
433df2d4 | 16609 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 16610 | if (!abbrev) |
348e048f DE |
16611 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
16612 | abbrev_number, | |
16613 | bfd_get_filename (abfd)); | |
16614 | ||
3019eac3 | 16615 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 16616 | die->sect_off = sect_off; |
93311388 DE |
16617 | die->tag = abbrev->tag; |
16618 | die->abbrev = abbrev_number; | |
16619 | ||
3019eac3 DE |
16620 | /* Make the result usable. |
16621 | The caller needs to update num_attrs after adding the extra | |
16622 | attributes. */ | |
93311388 DE |
16623 | die->num_attrs = abbrev->num_attrs; |
16624 | ||
16625 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
16626 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
16627 | info_ptr); | |
93311388 DE |
16628 | |
16629 | *diep = die; | |
16630 | *has_children = abbrev->has_children; | |
16631 | return info_ptr; | |
16632 | } | |
16633 | ||
3019eac3 DE |
16634 | /* Read a die and all its attributes. |
16635 | Set DIEP to point to a newly allocated die with its information, | |
16636 | except for its child, sibling, and parent fields. | |
16637 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
16638 | ||
d521ce57 | 16639 | static const gdb_byte * |
3019eac3 | 16640 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 16641 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
16642 | int *has_children) |
16643 | { | |
d521ce57 | 16644 | const gdb_byte *result; |
bf6af496 DE |
16645 | |
16646 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
16647 | ||
b4f54984 | 16648 | if (dwarf_die_debug) |
bf6af496 DE |
16649 | { |
16650 | fprintf_unfiltered (gdb_stdlog, | |
16651 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16652 | get_section_name (reader->die_section), |
bf6af496 DE |
16653 | (unsigned) (info_ptr - reader->die_section->buffer), |
16654 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16655 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
16656 | } |
16657 | ||
16658 | return result; | |
3019eac3 | 16659 | } |
433df2d4 DE |
16660 | \f |
16661 | /* Abbreviation tables. | |
3019eac3 | 16662 | |
433df2d4 | 16663 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
16664 | stored in a separate .debug_abbrev section. Before we read any |
16665 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
16666 | in a hash table. */ |
16667 | ||
16668 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
16669 | ||
16670 | static struct abbrev_info * | |
16671 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
16672 | { | |
16673 | struct abbrev_info *abbrev; | |
16674 | ||
8d749320 | 16675 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 16676 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 16677 | |
433df2d4 DE |
16678 | return abbrev; |
16679 | } | |
16680 | ||
16681 | /* Add an abbreviation to the table. */ | |
c906108c SS |
16682 | |
16683 | static void | |
433df2d4 DE |
16684 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
16685 | unsigned int abbrev_number, | |
16686 | struct abbrev_info *abbrev) | |
16687 | { | |
16688 | unsigned int hash_number; | |
16689 | ||
16690 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16691 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
16692 | abbrev_table->abbrevs[hash_number] = abbrev; | |
16693 | } | |
dee91e82 | 16694 | |
433df2d4 DE |
16695 | /* Look up an abbrev in the table. |
16696 | Returns NULL if the abbrev is not found. */ | |
16697 | ||
16698 | static struct abbrev_info * | |
16699 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
16700 | unsigned int abbrev_number) | |
c906108c | 16701 | { |
433df2d4 DE |
16702 | unsigned int hash_number; |
16703 | struct abbrev_info *abbrev; | |
16704 | ||
16705 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16706 | abbrev = abbrev_table->abbrevs[hash_number]; | |
16707 | ||
16708 | while (abbrev) | |
16709 | { | |
16710 | if (abbrev->number == abbrev_number) | |
16711 | return abbrev; | |
16712 | abbrev = abbrev->next; | |
16713 | } | |
16714 | return NULL; | |
16715 | } | |
16716 | ||
16717 | /* Read in an abbrev table. */ | |
16718 | ||
16719 | static struct abbrev_table * | |
16720 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 16721 | sect_offset sect_off) |
433df2d4 DE |
16722 | { |
16723 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 16724 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 16725 | struct abbrev_table *abbrev_table; |
d521ce57 | 16726 | const gdb_byte *abbrev_ptr; |
c906108c SS |
16727 | struct abbrev_info *cur_abbrev; |
16728 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 16729 | unsigned int abbrev_form; |
f3dd6933 DJ |
16730 | struct attr_abbrev *cur_attrs; |
16731 | unsigned int allocated_attrs; | |
c906108c | 16732 | |
70ba0933 | 16733 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 16734 | abbrev_table->sect_off = sect_off; |
433df2d4 | 16735 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
16736 | abbrev_table->abbrevs = |
16737 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
16738 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
16739 | memset (abbrev_table->abbrevs, 0, |
16740 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 16741 | |
433df2d4 | 16742 | dwarf2_read_section (objfile, section); |
9c541725 | 16743 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
16744 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16745 | abbrev_ptr += bytes_read; | |
16746 | ||
f3dd6933 | 16747 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 16748 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 16749 | |
0963b4bd | 16750 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
16751 | while (abbrev_number) |
16752 | { | |
433df2d4 | 16753 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
16754 | |
16755 | /* read in abbrev header */ | |
16756 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
16757 | cur_abbrev->tag |
16758 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
16759 | abbrev_ptr += bytes_read; |
16760 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
16761 | abbrev_ptr += 1; | |
16762 | ||
16763 | /* now read in declarations */ | |
22d2f3ab | 16764 | for (;;) |
c906108c | 16765 | { |
43988095 JK |
16766 | LONGEST implicit_const; |
16767 | ||
22d2f3ab JK |
16768 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16769 | abbrev_ptr += bytes_read; | |
16770 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16771 | abbrev_ptr += bytes_read; | |
43988095 JK |
16772 | if (abbrev_form == DW_FORM_implicit_const) |
16773 | { | |
16774 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
16775 | &bytes_read); | |
16776 | abbrev_ptr += bytes_read; | |
16777 | } | |
16778 | else | |
16779 | { | |
16780 | /* Initialize it due to a false compiler warning. */ | |
16781 | implicit_const = -1; | |
16782 | } | |
22d2f3ab JK |
16783 | |
16784 | if (abbrev_name == 0) | |
16785 | break; | |
16786 | ||
f3dd6933 | 16787 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 16788 | { |
f3dd6933 DJ |
16789 | allocated_attrs += ATTR_ALLOC_CHUNK; |
16790 | cur_attrs | |
224c3ddb | 16791 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 16792 | } |
ae038cb0 | 16793 | |
aead7601 SM |
16794 | cur_attrs[cur_abbrev->num_attrs].name |
16795 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 16796 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 16797 | = (enum dwarf_form) abbrev_form; |
43988095 | 16798 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 16799 | ++cur_abbrev->num_attrs; |
c906108c SS |
16800 | } |
16801 | ||
8d749320 SM |
16802 | cur_abbrev->attrs = |
16803 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
16804 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
16805 | memcpy (cur_abbrev->attrs, cur_attrs, |
16806 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
16807 | ||
433df2d4 | 16808 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
16809 | |
16810 | /* Get next abbreviation. | |
16811 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
16812 | always properly terminated with an abbrev number of 0. |
16813 | Exit loop if we encounter an abbreviation which we have | |
16814 | already read (which means we are about to read the abbreviations | |
16815 | for the next compile unit) or if the end of the abbreviation | |
16816 | table is reached. */ | |
433df2d4 | 16817 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
16818 | break; |
16819 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16820 | abbrev_ptr += bytes_read; | |
433df2d4 | 16821 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
16822 | break; |
16823 | } | |
f3dd6933 DJ |
16824 | |
16825 | xfree (cur_attrs); | |
433df2d4 | 16826 | return abbrev_table; |
c906108c SS |
16827 | } |
16828 | ||
433df2d4 | 16829 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 16830 | |
c906108c | 16831 | static void |
433df2d4 | 16832 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 16833 | { |
433df2d4 DE |
16834 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
16835 | xfree (abbrev_table); | |
c906108c SS |
16836 | } |
16837 | ||
f4dc4d17 DE |
16838 | /* Same as abbrev_table_free but as a cleanup. |
16839 | We pass in a pointer to the pointer to the table so that we can | |
16840 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 16841 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
16842 | |
16843 | static void | |
16844 | abbrev_table_free_cleanup (void *table_ptr) | |
16845 | { | |
9a3c8263 | 16846 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
16847 | |
16848 | if (*abbrev_table_ptr != NULL) | |
16849 | abbrev_table_free (*abbrev_table_ptr); | |
16850 | *abbrev_table_ptr = NULL; | |
16851 | } | |
16852 | ||
433df2d4 DE |
16853 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
16854 | ||
16855 | static void | |
16856 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
16857 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 16858 | { |
433df2d4 | 16859 | cu->abbrev_table = |
9c541725 | 16860 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 16861 | } |
c906108c | 16862 | |
433df2d4 | 16863 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 16864 | |
433df2d4 DE |
16865 | static void |
16866 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
16867 | { | |
9a3c8263 | 16868 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 16869 | |
a2ce51a0 DE |
16870 | if (cu->abbrev_table != NULL) |
16871 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
16872 | /* Set this to NULL so that we SEGV if we try to read it later, |
16873 | and also because free_comp_unit verifies this is NULL. */ | |
16874 | cu->abbrev_table = NULL; | |
16875 | } | |
16876 | \f | |
72bf9492 DJ |
16877 | /* Returns nonzero if TAG represents a type that we might generate a partial |
16878 | symbol for. */ | |
16879 | ||
16880 | static int | |
16881 | is_type_tag_for_partial (int tag) | |
16882 | { | |
16883 | switch (tag) | |
16884 | { | |
16885 | #if 0 | |
16886 | /* Some types that would be reasonable to generate partial symbols for, | |
16887 | that we don't at present. */ | |
16888 | case DW_TAG_array_type: | |
16889 | case DW_TAG_file_type: | |
16890 | case DW_TAG_ptr_to_member_type: | |
16891 | case DW_TAG_set_type: | |
16892 | case DW_TAG_string_type: | |
16893 | case DW_TAG_subroutine_type: | |
16894 | #endif | |
16895 | case DW_TAG_base_type: | |
16896 | case DW_TAG_class_type: | |
680b30c7 | 16897 | case DW_TAG_interface_type: |
72bf9492 DJ |
16898 | case DW_TAG_enumeration_type: |
16899 | case DW_TAG_structure_type: | |
16900 | case DW_TAG_subrange_type: | |
16901 | case DW_TAG_typedef: | |
16902 | case DW_TAG_union_type: | |
16903 | return 1; | |
16904 | default: | |
16905 | return 0; | |
16906 | } | |
16907 | } | |
16908 | ||
16909 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
16910 | ||
16911 | static struct partial_die_info * | |
dee91e82 | 16912 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 16913 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 16914 | { |
dee91e82 | 16915 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16916 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
16917 | struct partial_die_info *part_die; |
16918 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
16919 | struct abbrev_info *abbrev; | |
16920 | unsigned int bytes_read; | |
5afb4e99 | 16921 | unsigned int load_all = 0; |
72bf9492 DJ |
16922 | int nesting_level = 1; |
16923 | ||
16924 | parent_die = NULL; | |
16925 | last_die = NULL; | |
16926 | ||
7adf1e79 DE |
16927 | gdb_assert (cu->per_cu != NULL); |
16928 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16929 | load_all = 1; |
16930 | ||
72bf9492 DJ |
16931 | cu->partial_dies |
16932 | = htab_create_alloc_ex (cu->header.length / 12, | |
16933 | partial_die_hash, | |
16934 | partial_die_eq, | |
16935 | NULL, | |
16936 | &cu->comp_unit_obstack, | |
16937 | hashtab_obstack_allocate, | |
16938 | dummy_obstack_deallocate); | |
16939 | ||
8d749320 | 16940 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16941 | |
16942 | while (1) | |
16943 | { | |
16944 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16945 | ||
16946 | /* A NULL abbrev means the end of a series of children. */ | |
16947 | if (abbrev == NULL) | |
16948 | { | |
16949 | if (--nesting_level == 0) | |
16950 | { | |
16951 | /* PART_DIE was probably the last thing allocated on the | |
16952 | comp_unit_obstack, so we could call obstack_free | |
16953 | here. We don't do that because the waste is small, | |
16954 | and will be cleaned up when we're done with this | |
16955 | compilation unit. This way, we're also more robust | |
16956 | against other users of the comp_unit_obstack. */ | |
16957 | return first_die; | |
16958 | } | |
16959 | info_ptr += bytes_read; | |
16960 | last_die = parent_die; | |
16961 | parent_die = parent_die->die_parent; | |
16962 | continue; | |
16963 | } | |
16964 | ||
98bfdba5 PA |
16965 | /* Check for template arguments. We never save these; if |
16966 | they're seen, we just mark the parent, and go on our way. */ | |
16967 | if (parent_die != NULL | |
16968 | && cu->language == language_cplus | |
16969 | && (abbrev->tag == DW_TAG_template_type_param | |
16970 | || abbrev->tag == DW_TAG_template_value_param)) | |
16971 | { | |
16972 | parent_die->has_template_arguments = 1; | |
16973 | ||
16974 | if (!load_all) | |
16975 | { | |
16976 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16977 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16978 | continue; |
16979 | } | |
16980 | } | |
16981 | ||
0d99eb77 | 16982 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16983 | Skip their other children. */ |
16984 | if (!load_all | |
16985 | && cu->language == language_cplus | |
16986 | && parent_die != NULL | |
16987 | && parent_die->tag == DW_TAG_subprogram) | |
16988 | { | |
dee91e82 | 16989 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16990 | continue; |
16991 | } | |
16992 | ||
5afb4e99 DJ |
16993 | /* Check whether this DIE is interesting enough to save. Normally |
16994 | we would not be interested in members here, but there may be | |
16995 | later variables referencing them via DW_AT_specification (for | |
16996 | static members). */ | |
16997 | if (!load_all | |
16998 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16999 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
17000 | && abbrev->tag != DW_TAG_enumerator |
17001 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 17002 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 17003 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 17004 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 17005 | && abbrev->tag != DW_TAG_module |
95554aad | 17006 | && abbrev->tag != DW_TAG_member |
74921315 KS |
17007 | && abbrev->tag != DW_TAG_imported_unit |
17008 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
17009 | { |
17010 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17011 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
17012 | continue; |
17013 | } | |
17014 | ||
dee91e82 DE |
17015 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
17016 | info_ptr); | |
72bf9492 DJ |
17017 | |
17018 | /* This two-pass algorithm for processing partial symbols has a | |
17019 | high cost in cache pressure. Thus, handle some simple cases | |
17020 | here which cover the majority of C partial symbols. DIEs | |
17021 | which neither have specification tags in them, nor could have | |
17022 | specification tags elsewhere pointing at them, can simply be | |
17023 | processed and discarded. | |
17024 | ||
17025 | This segment is also optional; scan_partial_symbols and | |
17026 | add_partial_symbol will handle these DIEs if we chain | |
17027 | them in normally. When compilers which do not emit large | |
17028 | quantities of duplicate debug information are more common, | |
17029 | this code can probably be removed. */ | |
17030 | ||
17031 | /* Any complete simple types at the top level (pretty much all | |
17032 | of them, for a language without namespaces), can be processed | |
17033 | directly. */ | |
17034 | if (parent_die == NULL | |
17035 | && part_die->has_specification == 0 | |
17036 | && part_die->is_declaration == 0 | |
d8228535 | 17037 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
17038 | || part_die->tag == DW_TAG_base_type |
17039 | || part_die->tag == DW_TAG_subrange_type)) | |
17040 | { | |
17041 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 17042 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 17043 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 17044 | &objfile->static_psymbols, |
1762568f | 17045 | 0, cu->language, objfile); |
dee91e82 | 17046 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
17047 | continue; |
17048 | } | |
17049 | ||
d8228535 JK |
17050 | /* The exception for DW_TAG_typedef with has_children above is |
17051 | a workaround of GCC PR debug/47510. In the case of this complaint | |
17052 | type_name_no_tag_or_error will error on such types later. | |
17053 | ||
17054 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
17055 | it could not find the child DIEs referenced later, this is checked | |
17056 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
17057 | ||
17058 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
17059 | complaint (&symfile_complaints, | |
17060 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
17061 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 17062 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 17063 | |
72bf9492 DJ |
17064 | /* If we're at the second level, and we're an enumerator, and |
17065 | our parent has no specification (meaning possibly lives in a | |
17066 | namespace elsewhere), then we can add the partial symbol now | |
17067 | instead of queueing it. */ | |
17068 | if (part_die->tag == DW_TAG_enumerator | |
17069 | && parent_die != NULL | |
17070 | && parent_die->die_parent == NULL | |
17071 | && parent_die->tag == DW_TAG_enumeration_type | |
17072 | && parent_die->has_specification == 0) | |
17073 | { | |
17074 | if (part_die->name == NULL) | |
3e43a32a MS |
17075 | complaint (&symfile_complaints, |
17076 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 17077 | else if (building_psymtab) |
04a679b8 | 17078 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 17079 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 17080 | cu->language == language_cplus |
bb5ed363 DE |
17081 | ? &objfile->global_psymbols |
17082 | : &objfile->static_psymbols, | |
1762568f | 17083 | 0, cu->language, objfile); |
72bf9492 | 17084 | |
dee91e82 | 17085 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
17086 | continue; |
17087 | } | |
17088 | ||
17089 | /* We'll save this DIE so link it in. */ | |
17090 | part_die->die_parent = parent_die; | |
17091 | part_die->die_sibling = NULL; | |
17092 | part_die->die_child = NULL; | |
17093 | ||
17094 | if (last_die && last_die == parent_die) | |
17095 | last_die->die_child = part_die; | |
17096 | else if (last_die) | |
17097 | last_die->die_sibling = part_die; | |
17098 | ||
17099 | last_die = part_die; | |
17100 | ||
17101 | if (first_die == NULL) | |
17102 | first_die = part_die; | |
17103 | ||
17104 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
17105 | find interesting need to be in the hash table, because we | |
17106 | also have the parent/sibling/child chains; only those that we | |
17107 | might refer to by offset later during partial symbol reading. | |
17108 | ||
17109 | For now this means things that might have be the target of a | |
17110 | DW_AT_specification, DW_AT_abstract_origin, or | |
17111 | DW_AT_extension. DW_AT_extension will refer only to | |
17112 | namespaces; DW_AT_abstract_origin refers to functions (and | |
17113 | many things under the function DIE, but we do not recurse | |
17114 | into function DIEs during partial symbol reading) and | |
17115 | possibly variables as well; DW_AT_specification refers to | |
17116 | declarations. Declarations ought to have the DW_AT_declaration | |
17117 | flag. It happens that GCC forgets to put it in sometimes, but | |
17118 | only for functions, not for types. | |
17119 | ||
17120 | Adding more things than necessary to the hash table is harmless | |
17121 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
17122 | wasted time in find_partial_die, when we reread the compilation |
17123 | unit with load_all_dies set. */ | |
72bf9492 | 17124 | |
5afb4e99 | 17125 | if (load_all |
72929c62 | 17126 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 17127 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
17128 | || abbrev->tag == DW_TAG_variable |
17129 | || abbrev->tag == DW_TAG_namespace | |
17130 | || part_die->is_declaration) | |
17131 | { | |
17132 | void **slot; | |
17133 | ||
17134 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
17135 | to_underlying (part_die->sect_off), |
17136 | INSERT); | |
72bf9492 DJ |
17137 | *slot = part_die; |
17138 | } | |
17139 | ||
8d749320 | 17140 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
17141 | |
17142 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 17143 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
17144 | languages we have to, so that we can get at method physnames |
17145 | to infer fully qualified class names, for DW_AT_specification, | |
17146 | and for C++ template arguments. For C++, we also look one level | |
17147 | inside functions to find template arguments (if the name of the | |
17148 | function does not already contain the template arguments). | |
bc30ff58 JB |
17149 | |
17150 | For Ada, we need to scan the children of subprograms and lexical | |
17151 | blocks as well because Ada allows the definition of nested | |
17152 | entities that could be interesting for the debugger, such as | |
17153 | nested subprograms for instance. */ | |
72bf9492 | 17154 | if (last_die->has_children |
5afb4e99 DJ |
17155 | && (load_all |
17156 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 17157 | || last_die->tag == DW_TAG_module |
72bf9492 | 17158 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
17159 | || (cu->language == language_cplus |
17160 | && last_die->tag == DW_TAG_subprogram | |
17161 | && (last_die->name == NULL | |
17162 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
17163 | || (cu->language != language_c |
17164 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 17165 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 17166 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
17167 | || last_die->tag == DW_TAG_union_type)) |
17168 | || (cu->language == language_ada | |
17169 | && (last_die->tag == DW_TAG_subprogram | |
17170 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
17171 | { |
17172 | nesting_level++; | |
17173 | parent_die = last_die; | |
17174 | continue; | |
17175 | } | |
17176 | ||
17177 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17178 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
17179 | |
17180 | /* Back to the top, do it again. */ | |
17181 | } | |
17182 | } | |
17183 | ||
c906108c SS |
17184 | /* Read a minimal amount of information into the minimal die structure. */ |
17185 | ||
d521ce57 | 17186 | static const gdb_byte * |
dee91e82 DE |
17187 | read_partial_die (const struct die_reader_specs *reader, |
17188 | struct partial_die_info *part_die, | |
17189 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 17190 | const gdb_byte *info_ptr) |
c906108c | 17191 | { |
dee91e82 | 17192 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 17193 | struct objfile *objfile = cu->objfile; |
d521ce57 | 17194 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 17195 | unsigned int i; |
c906108c | 17196 | struct attribute attr; |
c5aa993b | 17197 | int has_low_pc_attr = 0; |
c906108c | 17198 | int has_high_pc_attr = 0; |
91da1414 | 17199 | int high_pc_relative = 0; |
c906108c | 17200 | |
72bf9492 | 17201 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 17202 | |
9c541725 | 17203 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
17204 | |
17205 | info_ptr += abbrev_len; | |
17206 | ||
17207 | if (abbrev == NULL) | |
17208 | return info_ptr; | |
17209 | ||
c906108c SS |
17210 | part_die->tag = abbrev->tag; |
17211 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
17212 | |
17213 | for (i = 0; i < abbrev->num_attrs; ++i) | |
17214 | { | |
dee91e82 | 17215 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
17216 | |
17217 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 17218 | partial symbol table. */ |
c906108c SS |
17219 | switch (attr.name) |
17220 | { | |
17221 | case DW_AT_name: | |
71c25dea TT |
17222 | switch (part_die->tag) |
17223 | { | |
17224 | case DW_TAG_compile_unit: | |
95554aad | 17225 | case DW_TAG_partial_unit: |
348e048f | 17226 | case DW_TAG_type_unit: |
71c25dea TT |
17227 | /* Compilation units have a DW_AT_name that is a filename, not |
17228 | a source language identifier. */ | |
17229 | case DW_TAG_enumeration_type: | |
17230 | case DW_TAG_enumerator: | |
17231 | /* These tags always have simple identifiers already; no need | |
17232 | to canonicalize them. */ | |
17233 | part_die->name = DW_STRING (&attr); | |
17234 | break; | |
17235 | default: | |
17236 | part_die->name | |
17237 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 17238 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
17239 | break; |
17240 | } | |
c906108c | 17241 | break; |
31ef98ae | 17242 | case DW_AT_linkage_name: |
c906108c | 17243 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
17244 | /* Note that both forms of linkage name might appear. We |
17245 | assume they will be the same, and we only store the last | |
17246 | one we see. */ | |
94af9270 KS |
17247 | if (cu->language == language_ada) |
17248 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 17249 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
17250 | break; |
17251 | case DW_AT_low_pc: | |
17252 | has_low_pc_attr = 1; | |
31aa7e4e | 17253 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
17254 | break; |
17255 | case DW_AT_high_pc: | |
17256 | has_high_pc_attr = 1; | |
31aa7e4e JB |
17257 | part_die->highpc = attr_value_as_address (&attr); |
17258 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
17259 | high_pc_relative = 1; | |
c906108c SS |
17260 | break; |
17261 | case DW_AT_location: | |
0963b4bd | 17262 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
17263 | if (attr_form_is_block (&attr)) |
17264 | { | |
95554aad | 17265 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 17266 | } |
3690dd37 | 17267 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 17268 | { |
4d3c2250 | 17269 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
17270 | } |
17271 | else | |
17272 | { | |
4d3c2250 KB |
17273 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
17274 | "partial symbol information"); | |
8e19ed76 | 17275 | } |
c906108c | 17276 | break; |
c906108c SS |
17277 | case DW_AT_external: |
17278 | part_die->is_external = DW_UNSND (&attr); | |
17279 | break; | |
17280 | case DW_AT_declaration: | |
17281 | part_die->is_declaration = DW_UNSND (&attr); | |
17282 | break; | |
17283 | case DW_AT_type: | |
17284 | part_die->has_type = 1; | |
17285 | break; | |
17286 | case DW_AT_abstract_origin: | |
17287 | case DW_AT_specification: | |
72bf9492 DJ |
17288 | case DW_AT_extension: |
17289 | part_die->has_specification = 1; | |
c764a876 | 17290 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17291 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17292 | || cu->per_cu->is_dwz); | |
c906108c SS |
17293 | break; |
17294 | case DW_AT_sibling: | |
17295 | /* Ignore absolute siblings, they might point outside of | |
17296 | the current compile unit. */ | |
17297 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
17298 | complaint (&symfile_complaints, |
17299 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 17300 | else |
b9502d3f | 17301 | { |
9c541725 PA |
17302 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
17303 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
17304 | |
17305 | if (sibling_ptr < info_ptr) | |
17306 | complaint (&symfile_complaints, | |
17307 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
17308 | else if (sibling_ptr > reader->buffer_end) |
17309 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
17310 | else |
17311 | part_die->sibling = sibling_ptr; | |
17312 | } | |
c906108c | 17313 | break; |
fa4028e9 JB |
17314 | case DW_AT_byte_size: |
17315 | part_die->has_byte_size = 1; | |
17316 | break; | |
ff908ebf AW |
17317 | case DW_AT_const_value: |
17318 | part_die->has_const_value = 1; | |
17319 | break; | |
68511cec CES |
17320 | case DW_AT_calling_convention: |
17321 | /* DWARF doesn't provide a way to identify a program's source-level | |
17322 | entry point. DW_AT_calling_convention attributes are only meant | |
17323 | to describe functions' calling conventions. | |
17324 | ||
17325 | However, because it's a necessary piece of information in | |
0c1b455e TT |
17326 | Fortran, and before DWARF 4 DW_CC_program was the only |
17327 | piece of debugging information whose definition refers to | |
17328 | a 'main program' at all, several compilers marked Fortran | |
17329 | main programs with DW_CC_program --- even when those | |
17330 | functions use the standard calling conventions. | |
17331 | ||
17332 | Although DWARF now specifies a way to provide this | |
17333 | information, we support this practice for backward | |
17334 | compatibility. */ | |
68511cec | 17335 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
17336 | && cu->language == language_fortran) |
17337 | part_die->main_subprogram = 1; | |
68511cec | 17338 | break; |
481860b3 GB |
17339 | case DW_AT_inline: |
17340 | if (DW_UNSND (&attr) == DW_INL_inlined | |
17341 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
17342 | part_die->may_be_inlined = 1; | |
17343 | break; | |
95554aad TT |
17344 | |
17345 | case DW_AT_import: | |
17346 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 17347 | { |
9c541725 | 17348 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17349 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17350 | || cu->per_cu->is_dwz); | |
17351 | } | |
95554aad TT |
17352 | break; |
17353 | ||
0c1b455e TT |
17354 | case DW_AT_main_subprogram: |
17355 | part_die->main_subprogram = DW_UNSND (&attr); | |
17356 | break; | |
17357 | ||
c906108c SS |
17358 | default: |
17359 | break; | |
17360 | } | |
17361 | } | |
17362 | ||
91da1414 MW |
17363 | if (high_pc_relative) |
17364 | part_die->highpc += part_die->lowpc; | |
17365 | ||
9373cf26 JK |
17366 | if (has_low_pc_attr && has_high_pc_attr) |
17367 | { | |
17368 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
17369 | eliminate duplicate copies of functions and vtables and such. | |
17370 | The linker will arbitrarily choose one and discard the others. | |
17371 | The AT_*_pc values for such functions refer to local labels in | |
17372 | these sections. If the section from that file was discarded, the | |
17373 | labels are not in the output, so the relocs get a value of 0. | |
17374 | If this is a discarded function, mark the pc bounds as invalid, | |
17375 | so that GDB will ignore it. */ | |
17376 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
17377 | { | |
bb5ed363 | 17378 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17379 | |
17380 | complaint (&symfile_complaints, | |
17381 | _("DW_AT_low_pc %s is zero " | |
17382 | "for DIE at 0x%x [in module %s]"), | |
17383 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 17384 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
17385 | } |
17386 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
17387 | else if (part_die->lowpc >= part_die->highpc) | |
17388 | { | |
bb5ed363 | 17389 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17390 | |
17391 | complaint (&symfile_complaints, | |
17392 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
17393 | "for DIE at 0x%x [in module %s]"), | |
17394 | paddress (gdbarch, part_die->lowpc), | |
17395 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
17396 | to_underlying (part_die->sect_off), |
17397 | objfile_name (objfile)); | |
9373cf26 JK |
17398 | } |
17399 | else | |
17400 | part_die->has_pc_info = 1; | |
17401 | } | |
85cbf3d3 | 17402 | |
c906108c SS |
17403 | return info_ptr; |
17404 | } | |
17405 | ||
72bf9492 DJ |
17406 | /* Find a cached partial DIE at OFFSET in CU. */ |
17407 | ||
17408 | static struct partial_die_info * | |
9c541725 | 17409 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
17410 | { |
17411 | struct partial_die_info *lookup_die = NULL; | |
17412 | struct partial_die_info part_die; | |
17413 | ||
9c541725 | 17414 | part_die.sect_off = sect_off; |
9a3c8263 SM |
17415 | lookup_die = ((struct partial_die_info *) |
17416 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 17417 | to_underlying (sect_off))); |
72bf9492 | 17418 | |
72bf9492 DJ |
17419 | return lookup_die; |
17420 | } | |
17421 | ||
348e048f DE |
17422 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
17423 | except in the case of .debug_types DIEs which do not reference | |
17424 | outside their CU (they do however referencing other types via | |
55f1336d | 17425 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
17426 | |
17427 | static struct partial_die_info * | |
9c541725 | 17428 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 17429 | { |
bb5ed363 | 17430 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
17431 | struct dwarf2_per_cu_data *per_cu = NULL; |
17432 | struct partial_die_info *pd = NULL; | |
72bf9492 | 17433 | |
36586728 | 17434 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 17435 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 17436 | { |
9c541725 | 17437 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
17438 | if (pd != NULL) |
17439 | return pd; | |
0d99eb77 DE |
17440 | /* We missed recording what we needed. |
17441 | Load all dies and try again. */ | |
17442 | per_cu = cu->per_cu; | |
5afb4e99 | 17443 | } |
0d99eb77 DE |
17444 | else |
17445 | { | |
17446 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 17447 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 17448 | { |
9c541725 PA |
17449 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
17450 | " external reference to offset 0x%x [in module %s].\n"), | |
17451 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
17452 | bfd_get_filename (objfile->obfd)); |
17453 | } | |
9c541725 | 17454 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 17455 | objfile); |
72bf9492 | 17456 | |
0d99eb77 DE |
17457 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
17458 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 17459 | |
0d99eb77 | 17460 | per_cu->cu->last_used = 0; |
9c541725 | 17461 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 17462 | } |
5afb4e99 | 17463 | |
dee91e82 DE |
17464 | /* If we didn't find it, and not all dies have been loaded, |
17465 | load them all and try again. */ | |
17466 | ||
5afb4e99 DJ |
17467 | if (pd == NULL && per_cu->load_all_dies == 0) |
17468 | { | |
5afb4e99 | 17469 | per_cu->load_all_dies = 1; |
fd820528 DE |
17470 | |
17471 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
17472 | THIS_CU->cu may already be in use. So we can't just free it and | |
17473 | replace its DIEs with the ones we read in. Instead, we leave those | |
17474 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
17475 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
17476 | set. */ | |
dee91e82 | 17477 | load_partial_comp_unit (per_cu); |
5afb4e99 | 17478 | |
9c541725 | 17479 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
17480 | } |
17481 | ||
17482 | if (pd == NULL) | |
17483 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
17484 | _("could not find partial DIE 0x%x " |
17485 | "in cache [from module %s]\n"), | |
9c541725 | 17486 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 17487 | return pd; |
72bf9492 DJ |
17488 | } |
17489 | ||
abc72ce4 DE |
17490 | /* See if we can figure out if the class lives in a namespace. We do |
17491 | this by looking for a member function; its demangled name will | |
17492 | contain namespace info, if there is any. */ | |
17493 | ||
17494 | static void | |
17495 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
17496 | struct dwarf2_cu *cu) | |
17497 | { | |
17498 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
17499 | what template types look like, because the demangler | |
17500 | frequently doesn't give the same name as the debug info. We | |
17501 | could fix this by only using the demangled name to get the | |
17502 | prefix (but see comment in read_structure_type). */ | |
17503 | ||
17504 | struct partial_die_info *real_pdi; | |
17505 | struct partial_die_info *child_pdi; | |
17506 | ||
17507 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
17508 | we should not do this. We'll prepend the parent's fully qualified | |
17509 | name when we create the partial symbol. */ | |
17510 | ||
17511 | real_pdi = struct_pdi; | |
17512 | while (real_pdi->has_specification) | |
36586728 TT |
17513 | real_pdi = find_partial_die (real_pdi->spec_offset, |
17514 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
17515 | |
17516 | if (real_pdi->die_parent != NULL) | |
17517 | return; | |
17518 | ||
17519 | for (child_pdi = struct_pdi->die_child; | |
17520 | child_pdi != NULL; | |
17521 | child_pdi = child_pdi->die_sibling) | |
17522 | { | |
17523 | if (child_pdi->tag == DW_TAG_subprogram | |
17524 | && child_pdi->linkage_name != NULL) | |
17525 | { | |
17526 | char *actual_class_name | |
17527 | = language_class_name_from_physname (cu->language_defn, | |
17528 | child_pdi->linkage_name); | |
17529 | if (actual_class_name != NULL) | |
17530 | { | |
17531 | struct_pdi->name | |
224c3ddb SM |
17532 | = ((const char *) |
17533 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17534 | actual_class_name, | |
17535 | strlen (actual_class_name))); | |
abc72ce4 DE |
17536 | xfree (actual_class_name); |
17537 | } | |
17538 | break; | |
17539 | } | |
17540 | } | |
17541 | } | |
17542 | ||
72bf9492 DJ |
17543 | /* Adjust PART_DIE before generating a symbol for it. This function |
17544 | may set the is_external flag or change the DIE's name. */ | |
17545 | ||
17546 | static void | |
17547 | fixup_partial_die (struct partial_die_info *part_die, | |
17548 | struct dwarf2_cu *cu) | |
17549 | { | |
abc72ce4 DE |
17550 | /* Once we've fixed up a die, there's no point in doing so again. |
17551 | This also avoids a memory leak if we were to call | |
17552 | guess_partial_die_structure_name multiple times. */ | |
17553 | if (part_die->fixup_called) | |
17554 | return; | |
17555 | ||
72bf9492 DJ |
17556 | /* If we found a reference attribute and the DIE has no name, try |
17557 | to find a name in the referred to DIE. */ | |
17558 | ||
17559 | if (part_die->name == NULL && part_die->has_specification) | |
17560 | { | |
17561 | struct partial_die_info *spec_die; | |
72bf9492 | 17562 | |
36586728 TT |
17563 | spec_die = find_partial_die (part_die->spec_offset, |
17564 | part_die->spec_is_dwz, cu); | |
72bf9492 | 17565 | |
10b3939b | 17566 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
17567 | |
17568 | if (spec_die->name) | |
17569 | { | |
17570 | part_die->name = spec_die->name; | |
17571 | ||
17572 | /* Copy DW_AT_external attribute if it is set. */ | |
17573 | if (spec_die->is_external) | |
17574 | part_die->is_external = spec_die->is_external; | |
17575 | } | |
17576 | } | |
17577 | ||
17578 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
17579 | |
17580 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 17581 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 17582 | |
abc72ce4 DE |
17583 | /* If there is no parent die to provide a namespace, and there are |
17584 | children, see if we can determine the namespace from their linkage | |
122d1940 | 17585 | name. */ |
abc72ce4 | 17586 | if (cu->language == language_cplus |
8b70b953 | 17587 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17588 | && part_die->die_parent == NULL |
17589 | && part_die->has_children | |
17590 | && (part_die->tag == DW_TAG_class_type | |
17591 | || part_die->tag == DW_TAG_structure_type | |
17592 | || part_die->tag == DW_TAG_union_type)) | |
17593 | guess_partial_die_structure_name (part_die, cu); | |
17594 | ||
53832f31 TT |
17595 | /* GCC might emit a nameless struct or union that has a linkage |
17596 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17597 | if (part_die->name == NULL | |
96408a79 SA |
17598 | && (part_die->tag == DW_TAG_class_type |
17599 | || part_die->tag == DW_TAG_interface_type | |
17600 | || part_die->tag == DW_TAG_structure_type | |
17601 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
17602 | && part_die->linkage_name != NULL) |
17603 | { | |
17604 | char *demangled; | |
17605 | ||
8de20a37 | 17606 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
17607 | if (demangled) |
17608 | { | |
96408a79 SA |
17609 | const char *base; |
17610 | ||
17611 | /* Strip any leading namespaces/classes, keep only the base name. | |
17612 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17613 | base = strrchr (demangled, ':'); | |
17614 | if (base && base > demangled && base[-1] == ':') | |
17615 | base++; | |
17616 | else | |
17617 | base = demangled; | |
17618 | ||
34a68019 | 17619 | part_die->name |
224c3ddb SM |
17620 | = ((const char *) |
17621 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17622 | base, strlen (base))); | |
53832f31 TT |
17623 | xfree (demangled); |
17624 | } | |
17625 | } | |
17626 | ||
abc72ce4 | 17627 | part_die->fixup_called = 1; |
72bf9492 DJ |
17628 | } |
17629 | ||
a8329558 | 17630 | /* Read an attribute value described by an attribute form. */ |
c906108c | 17631 | |
d521ce57 | 17632 | static const gdb_byte * |
dee91e82 DE |
17633 | read_attribute_value (const struct die_reader_specs *reader, |
17634 | struct attribute *attr, unsigned form, | |
43988095 | 17635 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 17636 | { |
dee91e82 | 17637 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
17638 | struct objfile *objfile = cu->objfile; |
17639 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 17640 | bfd *abfd = reader->abfd; |
e7c27a73 | 17641 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17642 | unsigned int bytes_read; |
17643 | struct dwarf_block *blk; | |
17644 | ||
aead7601 | 17645 | attr->form = (enum dwarf_form) form; |
a8329558 | 17646 | switch (form) |
c906108c | 17647 | { |
c906108c | 17648 | case DW_FORM_ref_addr: |
ae411497 | 17649 | if (cu->header.version == 2) |
4568ecf9 | 17650 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 17651 | else |
4568ecf9 DE |
17652 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
17653 | &cu->header, &bytes_read); | |
ae411497 TT |
17654 | info_ptr += bytes_read; |
17655 | break; | |
36586728 TT |
17656 | case DW_FORM_GNU_ref_alt: |
17657 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17658 | info_ptr += bytes_read; | |
17659 | break; | |
ae411497 | 17660 | case DW_FORM_addr: |
e7c27a73 | 17661 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 17662 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 17663 | info_ptr += bytes_read; |
c906108c SS |
17664 | break; |
17665 | case DW_FORM_block2: | |
7b5a2f43 | 17666 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17667 | blk->size = read_2_bytes (abfd, info_ptr); |
17668 | info_ptr += 2; | |
17669 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17670 | info_ptr += blk->size; | |
17671 | DW_BLOCK (attr) = blk; | |
17672 | break; | |
17673 | case DW_FORM_block4: | |
7b5a2f43 | 17674 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17675 | blk->size = read_4_bytes (abfd, info_ptr); |
17676 | info_ptr += 4; | |
17677 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17678 | info_ptr += blk->size; | |
17679 | DW_BLOCK (attr) = blk; | |
17680 | break; | |
17681 | case DW_FORM_data2: | |
17682 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
17683 | info_ptr += 2; | |
17684 | break; | |
17685 | case DW_FORM_data4: | |
17686 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
17687 | info_ptr += 4; | |
17688 | break; | |
17689 | case DW_FORM_data8: | |
17690 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
17691 | info_ptr += 8; | |
17692 | break; | |
0224619f JK |
17693 | case DW_FORM_data16: |
17694 | blk = dwarf_alloc_block (cu); | |
17695 | blk->size = 16; | |
17696 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
17697 | info_ptr += 16; | |
17698 | DW_BLOCK (attr) = blk; | |
17699 | break; | |
2dc7f7b3 TT |
17700 | case DW_FORM_sec_offset: |
17701 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17702 | info_ptr += bytes_read; | |
17703 | break; | |
c906108c | 17704 | case DW_FORM_string: |
9b1c24c8 | 17705 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 17706 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
17707 | info_ptr += bytes_read; |
17708 | break; | |
4bdf3d34 | 17709 | case DW_FORM_strp: |
36586728 TT |
17710 | if (!cu->per_cu->is_dwz) |
17711 | { | |
17712 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
17713 | &bytes_read); | |
17714 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17715 | info_ptr += bytes_read; | |
17716 | break; | |
17717 | } | |
17718 | /* FALLTHROUGH */ | |
43988095 JK |
17719 | case DW_FORM_line_strp: |
17720 | if (!cu->per_cu->is_dwz) | |
17721 | { | |
17722 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
17723 | cu_header, &bytes_read); | |
17724 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17725 | info_ptr += bytes_read; | |
17726 | break; | |
17727 | } | |
17728 | /* FALLTHROUGH */ | |
36586728 TT |
17729 | case DW_FORM_GNU_strp_alt: |
17730 | { | |
17731 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17732 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
17733 | &bytes_read); | |
17734 | ||
17735 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
17736 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17737 | info_ptr += bytes_read; | |
17738 | } | |
4bdf3d34 | 17739 | break; |
2dc7f7b3 | 17740 | case DW_FORM_exprloc: |
c906108c | 17741 | case DW_FORM_block: |
7b5a2f43 | 17742 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17743 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17744 | info_ptr += bytes_read; | |
17745 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17746 | info_ptr += blk->size; | |
17747 | DW_BLOCK (attr) = blk; | |
17748 | break; | |
17749 | case DW_FORM_block1: | |
7b5a2f43 | 17750 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17751 | blk->size = read_1_byte (abfd, info_ptr); |
17752 | info_ptr += 1; | |
17753 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17754 | info_ptr += blk->size; | |
17755 | DW_BLOCK (attr) = blk; | |
17756 | break; | |
17757 | case DW_FORM_data1: | |
17758 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17759 | info_ptr += 1; | |
17760 | break; | |
17761 | case DW_FORM_flag: | |
17762 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17763 | info_ptr += 1; | |
17764 | break; | |
2dc7f7b3 TT |
17765 | case DW_FORM_flag_present: |
17766 | DW_UNSND (attr) = 1; | |
17767 | break; | |
c906108c SS |
17768 | case DW_FORM_sdata: |
17769 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17770 | info_ptr += bytes_read; | |
17771 | break; | |
17772 | case DW_FORM_udata: | |
17773 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17774 | info_ptr += bytes_read; | |
17775 | break; | |
17776 | case DW_FORM_ref1: | |
9c541725 | 17777 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17778 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
17779 | info_ptr += 1; |
17780 | break; | |
17781 | case DW_FORM_ref2: | |
9c541725 | 17782 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17783 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
17784 | info_ptr += 2; |
17785 | break; | |
17786 | case DW_FORM_ref4: | |
9c541725 | 17787 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17788 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
17789 | info_ptr += 4; |
17790 | break; | |
613e1657 | 17791 | case DW_FORM_ref8: |
9c541725 | 17792 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17793 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
17794 | info_ptr += 8; |
17795 | break; | |
55f1336d | 17796 | case DW_FORM_ref_sig8: |
ac9ec31b | 17797 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
17798 | info_ptr += 8; |
17799 | break; | |
c906108c | 17800 | case DW_FORM_ref_udata: |
9c541725 | 17801 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17802 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
17803 | info_ptr += bytes_read; |
17804 | break; | |
c906108c | 17805 | case DW_FORM_indirect: |
a8329558 KW |
17806 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17807 | info_ptr += bytes_read; | |
43988095 JK |
17808 | if (form == DW_FORM_implicit_const) |
17809 | { | |
17810 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17811 | info_ptr += bytes_read; | |
17812 | } | |
17813 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
17814 | info_ptr); | |
17815 | break; | |
17816 | case DW_FORM_implicit_const: | |
17817 | DW_SND (attr) = implicit_const; | |
a8329558 | 17818 | break; |
3019eac3 DE |
17819 | case DW_FORM_GNU_addr_index: |
17820 | if (reader->dwo_file == NULL) | |
17821 | { | |
17822 | /* For now flag a hard error. | |
17823 | Later we can turn this into a complaint. */ | |
17824 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17825 | dwarf_form_name (form), | |
17826 | bfd_get_filename (abfd)); | |
17827 | } | |
17828 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
17829 | info_ptr += bytes_read; | |
17830 | break; | |
17831 | case DW_FORM_GNU_str_index: | |
17832 | if (reader->dwo_file == NULL) | |
17833 | { | |
17834 | /* For now flag a hard error. | |
17835 | Later we can turn this into a complaint if warranted. */ | |
17836 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17837 | dwarf_form_name (form), | |
17838 | bfd_get_filename (abfd)); | |
17839 | } | |
17840 | { | |
17841 | ULONGEST str_index = | |
17842 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17843 | ||
342587c4 | 17844 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
17845 | DW_STRING_IS_CANONICAL (attr) = 0; |
17846 | info_ptr += bytes_read; | |
17847 | } | |
17848 | break; | |
c906108c | 17849 | default: |
8a3fe4f8 | 17850 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
17851 | dwarf_form_name (form), |
17852 | bfd_get_filename (abfd)); | |
c906108c | 17853 | } |
28e94949 | 17854 | |
36586728 | 17855 | /* Super hack. */ |
7771576e | 17856 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
17857 | attr->form = DW_FORM_GNU_ref_alt; |
17858 | ||
28e94949 JB |
17859 | /* We have seen instances where the compiler tried to emit a byte |
17860 | size attribute of -1 which ended up being encoded as an unsigned | |
17861 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
17862 | an object of this size seems pretty unlikely so we can relatively | |
17863 | safely treat these cases as if the size attribute was invalid and | |
17864 | treat them as zero by default. */ | |
17865 | if (attr->name == DW_AT_byte_size | |
17866 | && form == DW_FORM_data4 | |
17867 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
17868 | { |
17869 | complaint | |
17870 | (&symfile_complaints, | |
43bbcdc2 PH |
17871 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
17872 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
17873 | DW_UNSND (attr) = 0; |
17874 | } | |
28e94949 | 17875 | |
c906108c SS |
17876 | return info_ptr; |
17877 | } | |
17878 | ||
a8329558 KW |
17879 | /* Read an attribute described by an abbreviated attribute. */ |
17880 | ||
d521ce57 | 17881 | static const gdb_byte * |
dee91e82 DE |
17882 | read_attribute (const struct die_reader_specs *reader, |
17883 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 17884 | const gdb_byte *info_ptr) |
a8329558 KW |
17885 | { |
17886 | attr->name = abbrev->name; | |
43988095 JK |
17887 | return read_attribute_value (reader, attr, abbrev->form, |
17888 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
17889 | } |
17890 | ||
0963b4bd | 17891 | /* Read dwarf information from a buffer. */ |
c906108c SS |
17892 | |
17893 | static unsigned int | |
a1855c1d | 17894 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17895 | { |
fe1b8b76 | 17896 | return bfd_get_8 (abfd, buf); |
c906108c SS |
17897 | } |
17898 | ||
17899 | static int | |
a1855c1d | 17900 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17901 | { |
fe1b8b76 | 17902 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
17903 | } |
17904 | ||
17905 | static unsigned int | |
a1855c1d | 17906 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17907 | { |
fe1b8b76 | 17908 | return bfd_get_16 (abfd, buf); |
c906108c SS |
17909 | } |
17910 | ||
21ae7a4d | 17911 | static int |
a1855c1d | 17912 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17913 | { |
17914 | return bfd_get_signed_16 (abfd, buf); | |
17915 | } | |
17916 | ||
c906108c | 17917 | static unsigned int |
a1855c1d | 17918 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17919 | { |
fe1b8b76 | 17920 | return bfd_get_32 (abfd, buf); |
c906108c SS |
17921 | } |
17922 | ||
21ae7a4d | 17923 | static int |
a1855c1d | 17924 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17925 | { |
17926 | return bfd_get_signed_32 (abfd, buf); | |
17927 | } | |
17928 | ||
93311388 | 17929 | static ULONGEST |
a1855c1d | 17930 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17931 | { |
fe1b8b76 | 17932 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17933 | } |
17934 | ||
17935 | static CORE_ADDR | |
d521ce57 | 17936 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17937 | unsigned int *bytes_read) |
c906108c | 17938 | { |
e7c27a73 | 17939 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17940 | CORE_ADDR retval = 0; |
17941 | ||
107d2387 | 17942 | if (cu_header->signed_addr_p) |
c906108c | 17943 | { |
107d2387 AC |
17944 | switch (cu_header->addr_size) |
17945 | { | |
17946 | case 2: | |
fe1b8b76 | 17947 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17948 | break; |
17949 | case 4: | |
fe1b8b76 | 17950 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17951 | break; |
17952 | case 8: | |
fe1b8b76 | 17953 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17954 | break; |
17955 | default: | |
8e65ff28 | 17956 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17957 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17958 | bfd_get_filename (abfd)); |
107d2387 AC |
17959 | } |
17960 | } | |
17961 | else | |
17962 | { | |
17963 | switch (cu_header->addr_size) | |
17964 | { | |
17965 | case 2: | |
fe1b8b76 | 17966 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17967 | break; |
17968 | case 4: | |
fe1b8b76 | 17969 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17970 | break; |
17971 | case 8: | |
fe1b8b76 | 17972 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17973 | break; |
17974 | default: | |
8e65ff28 | 17975 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17976 | _("read_address: bad switch, " |
17977 | "unsigned [in module %s]"), | |
659b0389 | 17978 | bfd_get_filename (abfd)); |
107d2387 | 17979 | } |
c906108c | 17980 | } |
64367e0a | 17981 | |
107d2387 AC |
17982 | *bytes_read = cu_header->addr_size; |
17983 | return retval; | |
c906108c SS |
17984 | } |
17985 | ||
f7ef9339 | 17986 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17987 | specification allows the initial length to take up either 4 bytes |
17988 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17989 | bytes describe the length and all offsets will be 8 bytes in length | |
17990 | instead of 4. | |
17991 | ||
f7ef9339 KB |
17992 | An older, non-standard 64-bit format is also handled by this |
17993 | function. The older format in question stores the initial length | |
17994 | as an 8-byte quantity without an escape value. Lengths greater | |
17995 | than 2^32 aren't very common which means that the initial 4 bytes | |
17996 | is almost always zero. Since a length value of zero doesn't make | |
17997 | sense for the 32-bit format, this initial zero can be considered to | |
17998 | be an escape value which indicates the presence of the older 64-bit | |
17999 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
18000 | greater than 4GB. If it becomes necessary to handle lengths |
18001 | somewhat larger than 4GB, we could allow other small values (such | |
18002 | as the non-sensical values of 1, 2, and 3) to also be used as | |
18003 | escape values indicating the presence of the old format. | |
f7ef9339 | 18004 | |
917c78fc MK |
18005 | The value returned via bytes_read should be used to increment the |
18006 | relevant pointer after calling read_initial_length(). | |
c764a876 | 18007 | |
613e1657 KB |
18008 | [ Note: read_initial_length() and read_offset() are based on the |
18009 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 18010 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
18011 | from: |
18012 | ||
f7ef9339 | 18013 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 18014 | |
613e1657 KB |
18015 | This document is only a draft and is subject to change. (So beware.) |
18016 | ||
f7ef9339 | 18017 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
18018 | determined empirically by examining 64-bit ELF files produced by |
18019 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
18020 | |
18021 | - Kevin, July 16, 2002 | |
613e1657 KB |
18022 | ] */ |
18023 | ||
18024 | static LONGEST | |
d521ce57 | 18025 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 18026 | { |
fe1b8b76 | 18027 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 18028 | |
dd373385 | 18029 | if (length == 0xffffffff) |
613e1657 | 18030 | { |
fe1b8b76 | 18031 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 18032 | *bytes_read = 12; |
613e1657 | 18033 | } |
dd373385 | 18034 | else if (length == 0) |
f7ef9339 | 18035 | { |
dd373385 | 18036 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 18037 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 18038 | *bytes_read = 8; |
f7ef9339 | 18039 | } |
613e1657 KB |
18040 | else |
18041 | { | |
18042 | *bytes_read = 4; | |
613e1657 KB |
18043 | } |
18044 | ||
c764a876 DE |
18045 | return length; |
18046 | } | |
dd373385 | 18047 | |
c764a876 DE |
18048 | /* Cover function for read_initial_length. |
18049 | Returns the length of the object at BUF, and stores the size of the | |
18050 | initial length in *BYTES_READ and stores the size that offsets will be in | |
18051 | *OFFSET_SIZE. | |
18052 | If the initial length size is not equivalent to that specified in | |
18053 | CU_HEADER then issue a complaint. | |
18054 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 18055 | |
c764a876 | 18056 | static LONGEST |
d521ce57 | 18057 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
18058 | const struct comp_unit_head *cu_header, |
18059 | unsigned int *bytes_read, | |
18060 | unsigned int *offset_size) | |
18061 | { | |
18062 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
18063 | ||
18064 | gdb_assert (cu_header->initial_length_size == 4 | |
18065 | || cu_header->initial_length_size == 8 | |
18066 | || cu_header->initial_length_size == 12); | |
18067 | ||
18068 | if (cu_header->initial_length_size != *bytes_read) | |
18069 | complaint (&symfile_complaints, | |
18070 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 18071 | |
c764a876 | 18072 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 18073 | return length; |
613e1657 KB |
18074 | } |
18075 | ||
18076 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 18077 | given by cu_header->offset_size. */ |
613e1657 KB |
18078 | |
18079 | static LONGEST | |
d521ce57 TT |
18080 | read_offset (bfd *abfd, const gdb_byte *buf, |
18081 | const struct comp_unit_head *cu_header, | |
891d2f0b | 18082 | unsigned int *bytes_read) |
c764a876 DE |
18083 | { |
18084 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 18085 | |
c764a876 DE |
18086 | *bytes_read = cu_header->offset_size; |
18087 | return offset; | |
18088 | } | |
18089 | ||
18090 | /* Read an offset from the data stream. */ | |
18091 | ||
18092 | static LONGEST | |
d521ce57 | 18093 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
18094 | { |
18095 | LONGEST retval = 0; | |
18096 | ||
c764a876 | 18097 | switch (offset_size) |
613e1657 KB |
18098 | { |
18099 | case 4: | |
fe1b8b76 | 18100 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
18101 | break; |
18102 | case 8: | |
fe1b8b76 | 18103 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
18104 | break; |
18105 | default: | |
8e65ff28 | 18106 | internal_error (__FILE__, __LINE__, |
c764a876 | 18107 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 18108 | bfd_get_filename (abfd)); |
613e1657 KB |
18109 | } |
18110 | ||
917c78fc | 18111 | return retval; |
613e1657 KB |
18112 | } |
18113 | ||
d521ce57 TT |
18114 | static const gdb_byte * |
18115 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
18116 | { |
18117 | /* If the size of a host char is 8 bits, we can return a pointer | |
18118 | to the buffer, otherwise we have to copy the data to a buffer | |
18119 | allocated on the temporary obstack. */ | |
4bdf3d34 | 18120 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 18121 | return buf; |
c906108c SS |
18122 | } |
18123 | ||
d521ce57 TT |
18124 | static const char * |
18125 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
18126 | unsigned int *bytes_read_ptr) | |
c906108c SS |
18127 | { |
18128 | /* If the size of a host char is 8 bits, we can return a pointer | |
18129 | to the string, otherwise we have to copy the string to a buffer | |
18130 | allocated on the temporary obstack. */ | |
4bdf3d34 | 18131 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
18132 | if (*buf == '\0') |
18133 | { | |
18134 | *bytes_read_ptr = 1; | |
18135 | return NULL; | |
18136 | } | |
d521ce57 TT |
18137 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
18138 | return (const char *) buf; | |
4bdf3d34 JJ |
18139 | } |
18140 | ||
43988095 JK |
18141 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
18142 | reporting strings FORM_NAME and SECT_NAME. */ | |
18143 | ||
d521ce57 | 18144 | static const char * |
43988095 JK |
18145 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
18146 | struct dwarf2_section_info *sect, | |
18147 | const char *form_name, | |
18148 | const char *sect_name) | |
18149 | { | |
18150 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
18151 | if (sect->buffer == NULL) | |
18152 | error (_("%s used without %s section [in module %s]"), | |
18153 | form_name, sect_name, bfd_get_filename (abfd)); | |
18154 | if (str_offset >= sect->size) | |
18155 | error (_("%s pointing outside of %s section [in module %s]"), | |
18156 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 18157 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 18158 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 18159 | return NULL; |
43988095 JK |
18160 | return (const char *) (sect->buffer + str_offset); |
18161 | } | |
18162 | ||
18163 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
18164 | ||
18165 | static const char * | |
18166 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
18167 | { | |
18168 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
18169 | &dwarf2_per_objfile->str, | |
18170 | "DW_FORM_strp", ".debug_str"); | |
18171 | } | |
18172 | ||
18173 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
18174 | ||
18175 | static const char * | |
18176 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
18177 | { | |
18178 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
18179 | &dwarf2_per_objfile->line_str, | |
18180 | "DW_FORM_line_strp", | |
18181 | ".debug_line_str"); | |
c906108c SS |
18182 | } |
18183 | ||
36586728 TT |
18184 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
18185 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
18186 | the string consists of a single NUL byte, return NULL; otherwise | |
18187 | return a pointer to the string. */ | |
18188 | ||
d521ce57 | 18189 | static const char * |
36586728 TT |
18190 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
18191 | { | |
18192 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
18193 | ||
18194 | if (dwz->str.buffer == NULL) | |
18195 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
18196 | "section [in module %s]"), | |
18197 | bfd_get_filename (dwz->dwz_bfd)); | |
18198 | if (str_offset >= dwz->str.size) | |
18199 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
18200 | ".debug_str section [in module %s]"), | |
18201 | bfd_get_filename (dwz->dwz_bfd)); | |
18202 | gdb_assert (HOST_CHAR_BIT == 8); | |
18203 | if (dwz->str.buffer[str_offset] == '\0') | |
18204 | return NULL; | |
d521ce57 | 18205 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
18206 | } |
18207 | ||
43988095 JK |
18208 | /* Return pointer to string at .debug_str offset as read from BUF. |
18209 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18210 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18211 | ||
d521ce57 TT |
18212 | static const char * |
18213 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
18214 | const struct comp_unit_head *cu_header, |
18215 | unsigned int *bytes_read_ptr) | |
18216 | { | |
18217 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
18218 | ||
18219 | return read_indirect_string_at_offset (abfd, str_offset); | |
18220 | } | |
18221 | ||
43988095 JK |
18222 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
18223 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18224 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18225 | ||
18226 | static const char * | |
18227 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
18228 | const struct comp_unit_head *cu_header, | |
18229 | unsigned int *bytes_read_ptr) | |
18230 | { | |
18231 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
18232 | ||
18233 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
18234 | } | |
18235 | ||
18236 | ULONGEST | |
d521ce57 | 18237 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 18238 | unsigned int *bytes_read_ptr) |
c906108c | 18239 | { |
12df843f | 18240 | ULONGEST result; |
ce5d95e1 | 18241 | unsigned int num_read; |
870f88f7 | 18242 | int shift; |
c906108c SS |
18243 | unsigned char byte; |
18244 | ||
18245 | result = 0; | |
18246 | shift = 0; | |
18247 | num_read = 0; | |
c906108c SS |
18248 | while (1) |
18249 | { | |
fe1b8b76 | 18250 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
18251 | buf++; |
18252 | num_read++; | |
12df843f | 18253 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
18254 | if ((byte & 128) == 0) |
18255 | { | |
18256 | break; | |
18257 | } | |
18258 | shift += 7; | |
18259 | } | |
18260 | *bytes_read_ptr = num_read; | |
18261 | return result; | |
18262 | } | |
18263 | ||
12df843f | 18264 | static LONGEST |
d521ce57 TT |
18265 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
18266 | unsigned int *bytes_read_ptr) | |
c906108c | 18267 | { |
12df843f | 18268 | LONGEST result; |
870f88f7 | 18269 | int shift, num_read; |
c906108c SS |
18270 | unsigned char byte; |
18271 | ||
18272 | result = 0; | |
18273 | shift = 0; | |
c906108c | 18274 | num_read = 0; |
c906108c SS |
18275 | while (1) |
18276 | { | |
fe1b8b76 | 18277 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
18278 | buf++; |
18279 | num_read++; | |
12df843f | 18280 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
18281 | shift += 7; |
18282 | if ((byte & 128) == 0) | |
18283 | { | |
18284 | break; | |
18285 | } | |
18286 | } | |
77e0b926 | 18287 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 18288 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
18289 | *bytes_read_ptr = num_read; |
18290 | return result; | |
18291 | } | |
18292 | ||
3019eac3 DE |
18293 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18294 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
18295 | ADDR_SIZE is the size of addresses from the CU header. */ | |
18296 | ||
18297 | static CORE_ADDR | |
18298 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
18299 | { | |
18300 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18301 | bfd *abfd = objfile->obfd; | |
18302 | const gdb_byte *info_ptr; | |
18303 | ||
18304 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
18305 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
18306 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 18307 | objfile_name (objfile)); |
3019eac3 DE |
18308 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
18309 | error (_("DW_FORM_addr_index pointing outside of " | |
18310 | ".debug_addr section [in module %s]"), | |
4262abfb | 18311 | objfile_name (objfile)); |
3019eac3 DE |
18312 | info_ptr = (dwarf2_per_objfile->addr.buffer |
18313 | + addr_base + addr_index * addr_size); | |
18314 | if (addr_size == 4) | |
18315 | return bfd_get_32 (abfd, info_ptr); | |
18316 | else | |
18317 | return bfd_get_64 (abfd, info_ptr); | |
18318 | } | |
18319 | ||
18320 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
18321 | ||
18322 | static CORE_ADDR | |
18323 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
18324 | { | |
18325 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
18326 | } | |
18327 | ||
18328 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
18329 | ||
18330 | static CORE_ADDR | |
d521ce57 | 18331 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
18332 | unsigned int *bytes_read) |
18333 | { | |
18334 | bfd *abfd = cu->objfile->obfd; | |
18335 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
18336 | ||
18337 | return read_addr_index (cu, addr_index); | |
18338 | } | |
18339 | ||
18340 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
18341 | back to dwarf2_read_addr_index. */ | |
18342 | ||
18343 | struct dwarf2_read_addr_index_data | |
18344 | { | |
18345 | ULONGEST addr_base; | |
18346 | int addr_size; | |
18347 | }; | |
18348 | ||
18349 | /* die_reader_func for dwarf2_read_addr_index. */ | |
18350 | ||
18351 | static void | |
18352 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 18353 | const gdb_byte *info_ptr, |
3019eac3 DE |
18354 | struct die_info *comp_unit_die, |
18355 | int has_children, | |
18356 | void *data) | |
18357 | { | |
18358 | struct dwarf2_cu *cu = reader->cu; | |
18359 | struct dwarf2_read_addr_index_data *aidata = | |
18360 | (struct dwarf2_read_addr_index_data *) data; | |
18361 | ||
18362 | aidata->addr_base = cu->addr_base; | |
18363 | aidata->addr_size = cu->header.addr_size; | |
18364 | } | |
18365 | ||
18366 | /* Given an index in .debug_addr, fetch the value. | |
18367 | NOTE: This can be called during dwarf expression evaluation, | |
18368 | long after the debug information has been read, and thus per_cu->cu | |
18369 | may no longer exist. */ | |
18370 | ||
18371 | CORE_ADDR | |
18372 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
18373 | unsigned int addr_index) | |
18374 | { | |
18375 | struct objfile *objfile = per_cu->objfile; | |
18376 | struct dwarf2_cu *cu = per_cu->cu; | |
18377 | ULONGEST addr_base; | |
18378 | int addr_size; | |
18379 | ||
18380 | /* This is intended to be called from outside this file. */ | |
18381 | dw2_setup (objfile); | |
18382 | ||
18383 | /* We need addr_base and addr_size. | |
18384 | If we don't have PER_CU->cu, we have to get it. | |
18385 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18386 | which at this point doesn't seem justified: it's not clear how frequently | |
18387 | it would get used and it would increase the size of every PER_CU. | |
18388 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18389 | so we're not in uncharted territory here. | |
18390 | Alas we need to be a bit more complicated as addr_base is contained | |
18391 | in the DIE. | |
18392 | ||
18393 | We don't need to read the entire CU(/TU). | |
18394 | We just need the header and top level die. | |
a1b64ce1 | 18395 | |
3019eac3 | 18396 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18397 | For now we skip this optimization. */ |
3019eac3 DE |
18398 | |
18399 | if (cu != NULL) | |
18400 | { | |
18401 | addr_base = cu->addr_base; | |
18402 | addr_size = cu->header.addr_size; | |
18403 | } | |
18404 | else | |
18405 | { | |
18406 | struct dwarf2_read_addr_index_data aidata; | |
18407 | ||
a1b64ce1 DE |
18408 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
18409 | we need addr_base. */ | |
18410 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
18411 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
18412 | addr_base = aidata.addr_base; |
18413 | addr_size = aidata.addr_size; | |
18414 | } | |
18415 | ||
18416 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
18417 | } | |
18418 | ||
57d63ce2 DE |
18419 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
18420 | This is only used by the Fission support. */ | |
3019eac3 | 18421 | |
d521ce57 | 18422 | static const char * |
342587c4 | 18423 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
18424 | { |
18425 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 18426 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18427 | bfd *abfd = objfile->obfd; |
342587c4 | 18428 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
18429 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
18430 | struct dwarf2_section_info *str_offsets_section = | |
18431 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 18432 | const gdb_byte *info_ptr; |
3019eac3 | 18433 | ULONGEST str_offset; |
57d63ce2 | 18434 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 18435 | |
73869dc2 DE |
18436 | dwarf2_read_section (objfile, str_section); |
18437 | dwarf2_read_section (objfile, str_offsets_section); | |
18438 | if (str_section->buffer == NULL) | |
57d63ce2 | 18439 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
18440 | " in CU at offset 0x%x [in module %s]"), |
18441 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18442 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 18443 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
18444 | " in CU at offset 0x%x [in module %s]"), |
18445 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18446 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 18447 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
18448 | " section in CU at offset 0x%x [in module %s]"), |
18449 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18450 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
18451 | + str_index * cu->header.offset_size); |
18452 | if (cu->header.offset_size == 4) | |
18453 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18454 | else | |
18455 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18456 | if (str_offset >= str_section->size) |
57d63ce2 | 18457 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
18458 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
18459 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18460 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
18461 | } |
18462 | ||
3019eac3 DE |
18463 | /* Return the length of an LEB128 number in BUF. */ |
18464 | ||
18465 | static int | |
18466 | leb128_size (const gdb_byte *buf) | |
18467 | { | |
18468 | const gdb_byte *begin = buf; | |
18469 | gdb_byte byte; | |
18470 | ||
18471 | while (1) | |
18472 | { | |
18473 | byte = *buf++; | |
18474 | if ((byte & 128) == 0) | |
18475 | return buf - begin; | |
18476 | } | |
18477 | } | |
18478 | ||
c906108c | 18479 | static void |
e142c38c | 18480 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
18481 | { |
18482 | switch (lang) | |
18483 | { | |
18484 | case DW_LANG_C89: | |
76bee0cc | 18485 | case DW_LANG_C99: |
0cfd832f | 18486 | case DW_LANG_C11: |
c906108c | 18487 | case DW_LANG_C: |
d1be3247 | 18488 | case DW_LANG_UPC: |
e142c38c | 18489 | cu->language = language_c; |
c906108c | 18490 | break; |
9c37b5ae | 18491 | case DW_LANG_Java: |
c906108c | 18492 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
18493 | case DW_LANG_C_plus_plus_11: |
18494 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 18495 | cu->language = language_cplus; |
c906108c | 18496 | break; |
6aecb9c2 JB |
18497 | case DW_LANG_D: |
18498 | cu->language = language_d; | |
18499 | break; | |
c906108c SS |
18500 | case DW_LANG_Fortran77: |
18501 | case DW_LANG_Fortran90: | |
b21b22e0 | 18502 | case DW_LANG_Fortran95: |
f7de9aab MW |
18503 | case DW_LANG_Fortran03: |
18504 | case DW_LANG_Fortran08: | |
e142c38c | 18505 | cu->language = language_fortran; |
c906108c | 18506 | break; |
a766d390 DE |
18507 | case DW_LANG_Go: |
18508 | cu->language = language_go; | |
18509 | break; | |
c906108c | 18510 | case DW_LANG_Mips_Assembler: |
e142c38c | 18511 | cu->language = language_asm; |
c906108c SS |
18512 | break; |
18513 | case DW_LANG_Ada83: | |
8aaf0b47 | 18514 | case DW_LANG_Ada95: |
bc5f45f8 JB |
18515 | cu->language = language_ada; |
18516 | break; | |
72019c9c GM |
18517 | case DW_LANG_Modula2: |
18518 | cu->language = language_m2; | |
18519 | break; | |
fe8e67fd PM |
18520 | case DW_LANG_Pascal83: |
18521 | cu->language = language_pascal; | |
18522 | break; | |
22566fbd DJ |
18523 | case DW_LANG_ObjC: |
18524 | cu->language = language_objc; | |
18525 | break; | |
c44af4eb TT |
18526 | case DW_LANG_Rust: |
18527 | case DW_LANG_Rust_old: | |
18528 | cu->language = language_rust; | |
18529 | break; | |
c906108c SS |
18530 | case DW_LANG_Cobol74: |
18531 | case DW_LANG_Cobol85: | |
c906108c | 18532 | default: |
e142c38c | 18533 | cu->language = language_minimal; |
c906108c SS |
18534 | break; |
18535 | } | |
e142c38c | 18536 | cu->language_defn = language_def (cu->language); |
c906108c SS |
18537 | } |
18538 | ||
18539 | /* Return the named attribute or NULL if not there. */ | |
18540 | ||
18541 | static struct attribute * | |
e142c38c | 18542 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 18543 | { |
a48e046c | 18544 | for (;;) |
c906108c | 18545 | { |
a48e046c TT |
18546 | unsigned int i; |
18547 | struct attribute *spec = NULL; | |
18548 | ||
18549 | for (i = 0; i < die->num_attrs; ++i) | |
18550 | { | |
18551 | if (die->attrs[i].name == name) | |
18552 | return &die->attrs[i]; | |
18553 | if (die->attrs[i].name == DW_AT_specification | |
18554 | || die->attrs[i].name == DW_AT_abstract_origin) | |
18555 | spec = &die->attrs[i]; | |
18556 | } | |
18557 | ||
18558 | if (!spec) | |
18559 | break; | |
c906108c | 18560 | |
f2f0e013 | 18561 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 18562 | } |
c5aa993b | 18563 | |
c906108c SS |
18564 | return NULL; |
18565 | } | |
18566 | ||
348e048f DE |
18567 | /* Return the named attribute or NULL if not there, |
18568 | but do not follow DW_AT_specification, etc. | |
18569 | This is for use in contexts where we're reading .debug_types dies. | |
18570 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
18571 | back up the chain, and we want to go down. */ | |
18572 | ||
18573 | static struct attribute * | |
45e58e77 | 18574 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
18575 | { |
18576 | unsigned int i; | |
18577 | ||
18578 | for (i = 0; i < die->num_attrs; ++i) | |
18579 | if (die->attrs[i].name == name) | |
18580 | return &die->attrs[i]; | |
18581 | ||
18582 | return NULL; | |
18583 | } | |
18584 | ||
7d45c7c3 KB |
18585 | /* Return the string associated with a string-typed attribute, or NULL if it |
18586 | is either not found or is of an incorrect type. */ | |
18587 | ||
18588 | static const char * | |
18589 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
18590 | { | |
18591 | struct attribute *attr; | |
18592 | const char *str = NULL; | |
18593 | ||
18594 | attr = dwarf2_attr (die, name, cu); | |
18595 | ||
18596 | if (attr != NULL) | |
18597 | { | |
43988095 | 18598 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
18599 | || attr->form == DW_FORM_string |
18600 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 18601 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
18602 | str = DW_STRING (attr); |
18603 | else | |
18604 | complaint (&symfile_complaints, | |
18605 | _("string type expected for attribute %s for " | |
18606 | "DIE at 0x%x in module %s"), | |
9c541725 | 18607 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
18608 | objfile_name (cu->objfile)); |
18609 | } | |
18610 | ||
18611 | return str; | |
18612 | } | |
18613 | ||
05cf31d1 JB |
18614 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
18615 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 18616 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
18617 | |
18618 | static int | |
18619 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
18620 | { | |
18621 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
18622 | ||
18623 | return (attr && DW_UNSND (attr)); | |
18624 | } | |
18625 | ||
3ca72b44 | 18626 | static int |
e142c38c | 18627 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 18628 | { |
05cf31d1 JB |
18629 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
18630 | which value is non-zero. However, we have to be careful with | |
18631 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
18632 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
18633 | end up accidently finding a declaration attribute that belongs | |
18634 | to a different DIE referenced by the specification attribute, | |
18635 | even though the given DIE does not have a declaration attribute. */ | |
18636 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
18637 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
18638 | } |
18639 | ||
63d06c5c | 18640 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 18641 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
18642 | containing the return value on output. If there is no |
18643 | specification, but there is an abstract origin, that is | |
18644 | returned. */ | |
63d06c5c DC |
18645 | |
18646 | static struct die_info * | |
f2f0e013 | 18647 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 18648 | { |
f2f0e013 DJ |
18649 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
18650 | *spec_cu); | |
63d06c5c | 18651 | |
edb3359d DJ |
18652 | if (spec_attr == NULL) |
18653 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
18654 | ||
63d06c5c DC |
18655 | if (spec_attr == NULL) |
18656 | return NULL; | |
18657 | else | |
f2f0e013 | 18658 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 18659 | } |
c906108c | 18660 | |
527f3840 JK |
18661 | /* Stub for free_line_header to match void * callback types. */ |
18662 | ||
18663 | static void | |
18664 | free_line_header_voidp (void *arg) | |
18665 | { | |
9a3c8263 | 18666 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 18667 | |
fff8551c | 18668 | delete lh; |
527f3840 JK |
18669 | } |
18670 | ||
fff8551c PA |
18671 | void |
18672 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 18673 | { |
27e0867f | 18674 | if (dwarf_line_debug >= 2) |
fff8551c PA |
18675 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
18676 | include_dirs.size () + 1, include_dir); | |
27e0867f | 18677 | |
fff8551c | 18678 | include_dirs.push_back (include_dir); |
debd256d | 18679 | } |
6e70227d | 18680 | |
fff8551c PA |
18681 | void |
18682 | line_header::add_file_name (const char *name, | |
ecfb656c | 18683 | dir_index d_index, |
fff8551c PA |
18684 | unsigned int mod_time, |
18685 | unsigned int length) | |
debd256d | 18686 | { |
27e0867f DE |
18687 | if (dwarf_line_debug >= 2) |
18688 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 18689 | (unsigned) file_names.size () + 1, name); |
27e0867f | 18690 | |
ecfb656c | 18691 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 18692 | } |
6e70227d | 18693 | |
83769d0b | 18694 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
18695 | |
18696 | static struct dwarf2_section_info * | |
18697 | get_debug_line_section (struct dwarf2_cu *cu) | |
18698 | { | |
18699 | struct dwarf2_section_info *section; | |
18700 | ||
18701 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
18702 | DWO file. */ | |
18703 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
18704 | section = &cu->dwo_unit->dwo_file->sections.line; | |
18705 | else if (cu->per_cu->is_dwz) | |
18706 | { | |
18707 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18708 | ||
18709 | section = &dwz->line; | |
18710 | } | |
18711 | else | |
18712 | section = &dwarf2_per_objfile->line; | |
18713 | ||
18714 | return section; | |
18715 | } | |
18716 | ||
43988095 JK |
18717 | /* Read directory or file name entry format, starting with byte of |
18718 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
18719 | entries count and the entries themselves in the described entry | |
18720 | format. */ | |
18721 | ||
18722 | static void | |
18723 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
18724 | struct line_header *lh, | |
18725 | const struct comp_unit_head *cu_header, | |
18726 | void (*callback) (struct line_header *lh, | |
18727 | const char *name, | |
ecfb656c | 18728 | dir_index d_index, |
43988095 JK |
18729 | unsigned int mod_time, |
18730 | unsigned int length)) | |
18731 | { | |
18732 | gdb_byte format_count, formati; | |
18733 | ULONGEST data_count, datai; | |
18734 | const gdb_byte *buf = *bufp; | |
18735 | const gdb_byte *format_header_data; | |
18736 | int i; | |
18737 | unsigned int bytes_read; | |
18738 | ||
18739 | format_count = read_1_byte (abfd, buf); | |
18740 | buf += 1; | |
18741 | format_header_data = buf; | |
18742 | for (formati = 0; formati < format_count; formati++) | |
18743 | { | |
18744 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18745 | buf += bytes_read; | |
18746 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18747 | buf += bytes_read; | |
18748 | } | |
18749 | ||
18750 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18751 | buf += bytes_read; | |
18752 | for (datai = 0; datai < data_count; datai++) | |
18753 | { | |
18754 | const gdb_byte *format = format_header_data; | |
18755 | struct file_entry fe; | |
18756 | ||
43988095 JK |
18757 | for (formati = 0; formati < format_count; formati++) |
18758 | { | |
ecfb656c | 18759 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18760 | format += bytes_read; |
43988095 | 18761 | |
ecfb656c | 18762 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18763 | format += bytes_read; |
ecfb656c PA |
18764 | |
18765 | gdb::optional<const char *> string; | |
18766 | gdb::optional<unsigned int> uint; | |
18767 | ||
43988095 JK |
18768 | switch (form) |
18769 | { | |
18770 | case DW_FORM_string: | |
ecfb656c | 18771 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
18772 | buf += bytes_read; |
18773 | break; | |
18774 | ||
18775 | case DW_FORM_line_strp: | |
ecfb656c PA |
18776 | string.emplace (read_indirect_line_string (abfd, buf, |
18777 | cu_header, | |
18778 | &bytes_read)); | |
43988095 JK |
18779 | buf += bytes_read; |
18780 | break; | |
18781 | ||
18782 | case DW_FORM_data1: | |
ecfb656c | 18783 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
18784 | buf += 1; |
18785 | break; | |
18786 | ||
18787 | case DW_FORM_data2: | |
ecfb656c | 18788 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
18789 | buf += 2; |
18790 | break; | |
18791 | ||
18792 | case DW_FORM_data4: | |
ecfb656c | 18793 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
18794 | buf += 4; |
18795 | break; | |
18796 | ||
18797 | case DW_FORM_data8: | |
ecfb656c | 18798 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
18799 | buf += 8; |
18800 | break; | |
18801 | ||
18802 | case DW_FORM_udata: | |
ecfb656c | 18803 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
18804 | buf += bytes_read; |
18805 | break; | |
18806 | ||
18807 | case DW_FORM_block: | |
18808 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
18809 | current GDB. */ | |
18810 | break; | |
18811 | } | |
ecfb656c PA |
18812 | |
18813 | switch (content_type) | |
18814 | { | |
18815 | case DW_LNCT_path: | |
18816 | if (string.has_value ()) | |
18817 | fe.name = *string; | |
18818 | break; | |
18819 | case DW_LNCT_directory_index: | |
18820 | if (uint.has_value ()) | |
18821 | fe.d_index = (dir_index) *uint; | |
18822 | break; | |
18823 | case DW_LNCT_timestamp: | |
18824 | if (uint.has_value ()) | |
18825 | fe.mod_time = *uint; | |
18826 | break; | |
18827 | case DW_LNCT_size: | |
18828 | if (uint.has_value ()) | |
18829 | fe.length = *uint; | |
18830 | break; | |
18831 | case DW_LNCT_MD5: | |
18832 | break; | |
18833 | default: | |
18834 | complaint (&symfile_complaints, | |
18835 | _("Unknown format content type %s"), | |
18836 | pulongest (content_type)); | |
18837 | } | |
43988095 JK |
18838 | } |
18839 | ||
ecfb656c | 18840 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
18841 | } |
18842 | ||
18843 | *bufp = buf; | |
18844 | } | |
18845 | ||
debd256d | 18846 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 18847 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 18848 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
18849 | Returns NULL if there is a problem reading the header, e.g., if it |
18850 | has a version we don't understand. | |
debd256d JB |
18851 | |
18852 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
18853 | the returned object point into the dwarf line section buffer, |
18854 | and must not be freed. */ | |
ae2de4f8 | 18855 | |
fff8551c | 18856 | static line_header_up |
9c541725 | 18857 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 18858 | { |
d521ce57 | 18859 | const gdb_byte *line_ptr; |
c764a876 | 18860 | unsigned int bytes_read, offset_size; |
debd256d | 18861 | int i; |
d521ce57 | 18862 | const char *cur_dir, *cur_file; |
3019eac3 DE |
18863 | struct dwarf2_section_info *section; |
18864 | bfd *abfd; | |
18865 | ||
36586728 | 18866 | section = get_debug_line_section (cu); |
3019eac3 DE |
18867 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
18868 | if (section->buffer == NULL) | |
debd256d | 18869 | { |
3019eac3 DE |
18870 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
18871 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
18872 | else | |
18873 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
18874 | return 0; |
18875 | } | |
18876 | ||
fceca515 DE |
18877 | /* We can't do this until we know the section is non-empty. |
18878 | Only then do we know we have such a section. */ | |
a32a8923 | 18879 | abfd = get_section_bfd_owner (section); |
fceca515 | 18880 | |
a738430d MK |
18881 | /* Make sure that at least there's room for the total_length field. |
18882 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 18883 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 18884 | { |
4d3c2250 | 18885 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18886 | return 0; |
18887 | } | |
18888 | ||
fff8551c | 18889 | line_header_up lh (new line_header ()); |
debd256d | 18890 | |
9c541725 | 18891 | lh->sect_off = sect_off; |
527f3840 JK |
18892 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
18893 | ||
9c541725 | 18894 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 18895 | |
a738430d | 18896 | /* Read in the header. */ |
6e70227d | 18897 | lh->total_length = |
c764a876 DE |
18898 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
18899 | &bytes_read, &offset_size); | |
debd256d | 18900 | line_ptr += bytes_read; |
3019eac3 | 18901 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 18902 | { |
4d3c2250 | 18903 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18904 | return 0; |
18905 | } | |
18906 | lh->statement_program_end = line_ptr + lh->total_length; | |
18907 | lh->version = read_2_bytes (abfd, line_ptr); | |
18908 | line_ptr += 2; | |
43988095 | 18909 | if (lh->version > 5) |
cd366ee8 DE |
18910 | { |
18911 | /* This is a version we don't understand. The format could have | |
18912 | changed in ways we don't handle properly so just punt. */ | |
18913 | complaint (&symfile_complaints, | |
18914 | _("unsupported version in .debug_line section")); | |
18915 | return NULL; | |
18916 | } | |
43988095 JK |
18917 | if (lh->version >= 5) |
18918 | { | |
18919 | gdb_byte segment_selector_size; | |
18920 | ||
18921 | /* Skip address size. */ | |
18922 | read_1_byte (abfd, line_ptr); | |
18923 | line_ptr += 1; | |
18924 | ||
18925 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18926 | line_ptr += 1; | |
18927 | if (segment_selector_size != 0) | |
18928 | { | |
18929 | complaint (&symfile_complaints, | |
18930 | _("unsupported segment selector size %u " | |
18931 | "in .debug_line section"), | |
18932 | segment_selector_size); | |
18933 | return NULL; | |
18934 | } | |
18935 | } | |
c764a876 DE |
18936 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18937 | line_ptr += offset_size; | |
debd256d JB |
18938 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18939 | line_ptr += 1; | |
2dc7f7b3 TT |
18940 | if (lh->version >= 4) |
18941 | { | |
18942 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18943 | line_ptr += 1; | |
18944 | } | |
18945 | else | |
18946 | lh->maximum_ops_per_instruction = 1; | |
18947 | ||
18948 | if (lh->maximum_ops_per_instruction == 0) | |
18949 | { | |
18950 | lh->maximum_ops_per_instruction = 1; | |
18951 | complaint (&symfile_complaints, | |
3e43a32a MS |
18952 | _("invalid maximum_ops_per_instruction " |
18953 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18954 | } |
18955 | ||
debd256d JB |
18956 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18957 | line_ptr += 1; | |
18958 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18959 | line_ptr += 1; | |
18960 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18961 | line_ptr += 1; | |
18962 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18963 | line_ptr += 1; | |
fff8551c | 18964 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18965 | |
18966 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18967 | for (i = 1; i < lh->opcode_base; ++i) | |
18968 | { | |
18969 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18970 | line_ptr += 1; | |
18971 | } | |
18972 | ||
43988095 | 18973 | if (lh->version >= 5) |
debd256d | 18974 | { |
43988095 | 18975 | /* Read directory table. */ |
fff8551c PA |
18976 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18977 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18978 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18979 | unsigned int length) |
18980 | { | |
18981 | lh->add_include_dir (name); | |
18982 | }); | |
debd256d | 18983 | |
43988095 | 18984 | /* Read file name table. */ |
fff8551c PA |
18985 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18986 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18987 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18988 | unsigned int length) |
18989 | { | |
ecfb656c | 18990 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18991 | }); |
43988095 JK |
18992 | } |
18993 | else | |
debd256d | 18994 | { |
43988095 JK |
18995 | /* Read directory table. */ |
18996 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18997 | { | |
18998 | line_ptr += bytes_read; | |
fff8551c | 18999 | lh->add_include_dir (cur_dir); |
43988095 | 19000 | } |
debd256d JB |
19001 | line_ptr += bytes_read; |
19002 | ||
43988095 JK |
19003 | /* Read file name table. */ |
19004 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
19005 | { | |
ecfb656c PA |
19006 | unsigned int mod_time, length; |
19007 | dir_index d_index; | |
43988095 JK |
19008 | |
19009 | line_ptr += bytes_read; | |
ecfb656c | 19010 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
19011 | line_ptr += bytes_read; |
19012 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19013 | line_ptr += bytes_read; | |
19014 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19015 | line_ptr += bytes_read; | |
19016 | ||
ecfb656c | 19017 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
19018 | } |
19019 | line_ptr += bytes_read; | |
debd256d | 19020 | } |
6e70227d | 19021 | lh->statement_program_start = line_ptr; |
debd256d | 19022 | |
3019eac3 | 19023 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 19024 | complaint (&symfile_complaints, |
3e43a32a MS |
19025 | _("line number info header doesn't " |
19026 | "fit in `.debug_line' section")); | |
debd256d | 19027 | |
debd256d JB |
19028 | return lh; |
19029 | } | |
c906108c | 19030 | |
c6da4cef DE |
19031 | /* Subroutine of dwarf_decode_lines to simplify it. |
19032 | Return the file name of the psymtab for included file FILE_INDEX | |
19033 | in line header LH of PST. | |
19034 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
19035 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
19036 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
19037 | ||
19038 | The function creates dangling cleanup registration. */ | |
c6da4cef | 19039 | |
d521ce57 | 19040 | static const char * |
c6da4cef DE |
19041 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
19042 | const struct partial_symtab *pst, | |
19043 | const char *comp_dir) | |
19044 | { | |
8c43009f | 19045 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
19046 | const char *include_name = fe.name; |
19047 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
19048 | const char *pst_filename; |
19049 | char *copied_name = NULL; | |
c6da4cef DE |
19050 | int file_is_pst; |
19051 | ||
8c43009f | 19052 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
19053 | |
19054 | if (!IS_ABSOLUTE_PATH (include_name) | |
19055 | && (dir_name != NULL || comp_dir != NULL)) | |
19056 | { | |
19057 | /* Avoid creating a duplicate psymtab for PST. | |
19058 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
19059 | Before we do the comparison, however, we need to account | |
19060 | for DIR_NAME and COMP_DIR. | |
19061 | First prepend dir_name (if non-NULL). If we still don't | |
19062 | have an absolute path prepend comp_dir (if non-NULL). | |
19063 | However, the directory we record in the include-file's | |
19064 | psymtab does not contain COMP_DIR (to match the | |
19065 | corresponding symtab(s)). | |
19066 | ||
19067 | Example: | |
19068 | ||
19069 | bash$ cd /tmp | |
19070 | bash$ gcc -g ./hello.c | |
19071 | include_name = "hello.c" | |
19072 | dir_name = "." | |
19073 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
19074 | DW_AT_name = "./hello.c" |
19075 | ||
19076 | */ | |
c6da4cef DE |
19077 | |
19078 | if (dir_name != NULL) | |
19079 | { | |
d521ce57 TT |
19080 | char *tem = concat (dir_name, SLASH_STRING, |
19081 | include_name, (char *)NULL); | |
19082 | ||
19083 | make_cleanup (xfree, tem); | |
19084 | include_name = tem; | |
c6da4cef | 19085 | include_name_to_compare = include_name; |
c6da4cef DE |
19086 | } |
19087 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
19088 | { | |
d521ce57 TT |
19089 | char *tem = concat (comp_dir, SLASH_STRING, |
19090 | include_name, (char *)NULL); | |
19091 | ||
19092 | make_cleanup (xfree, tem); | |
19093 | include_name_to_compare = tem; | |
c6da4cef DE |
19094 | } |
19095 | } | |
19096 | ||
19097 | pst_filename = pst->filename; | |
19098 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
19099 | { | |
72b9f47f TT |
19100 | copied_name = concat (pst->dirname, SLASH_STRING, |
19101 | pst_filename, (char *)NULL); | |
19102 | pst_filename = copied_name; | |
c6da4cef DE |
19103 | } |
19104 | ||
1e3fad37 | 19105 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 19106 | |
72b9f47f TT |
19107 | if (copied_name != NULL) |
19108 | xfree (copied_name); | |
c6da4cef DE |
19109 | |
19110 | if (file_is_pst) | |
19111 | return NULL; | |
19112 | return include_name; | |
19113 | } | |
19114 | ||
d9b3de22 DE |
19115 | /* State machine to track the state of the line number program. */ |
19116 | ||
6f77053d | 19117 | class lnp_state_machine |
d9b3de22 | 19118 | { |
6f77053d PA |
19119 | public: |
19120 | /* Initialize a machine state for the start of a line number | |
19121 | program. */ | |
19122 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
19123 | ||
8c43009f PA |
19124 | file_entry *current_file () |
19125 | { | |
19126 | /* lh->file_names is 0-based, but the file name numbers in the | |
19127 | statement program are 1-based. */ | |
6f77053d PA |
19128 | return m_line_header->file_name_at (m_file); |
19129 | } | |
19130 | ||
19131 | /* Record the line in the state machine. END_SEQUENCE is true if | |
19132 | we're processing the end of a sequence. */ | |
19133 | void record_line (bool end_sequence); | |
19134 | ||
19135 | /* Check address and if invalid nop-out the rest of the lines in this | |
19136 | sequence. */ | |
19137 | void check_line_address (struct dwarf2_cu *cu, | |
19138 | const gdb_byte *line_ptr, | |
19139 | CORE_ADDR lowpc, CORE_ADDR address); | |
19140 | ||
19141 | void handle_set_discriminator (unsigned int discriminator) | |
19142 | { | |
19143 | m_discriminator = discriminator; | |
19144 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
19145 | } | |
19146 | ||
19147 | /* Handle DW_LNE_set_address. */ | |
19148 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
19149 | { | |
19150 | m_op_index = 0; | |
19151 | address += baseaddr; | |
19152 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
19153 | } | |
19154 | ||
19155 | /* Handle DW_LNS_advance_pc. */ | |
19156 | void handle_advance_pc (CORE_ADDR adjust); | |
19157 | ||
19158 | /* Handle a special opcode. */ | |
19159 | void handle_special_opcode (unsigned char op_code); | |
19160 | ||
19161 | /* Handle DW_LNS_advance_line. */ | |
19162 | void handle_advance_line (int line_delta) | |
19163 | { | |
19164 | advance_line (line_delta); | |
19165 | } | |
19166 | ||
19167 | /* Handle DW_LNS_set_file. */ | |
19168 | void handle_set_file (file_name_index file); | |
19169 | ||
19170 | /* Handle DW_LNS_negate_stmt. */ | |
19171 | void handle_negate_stmt () | |
19172 | { | |
19173 | m_is_stmt = !m_is_stmt; | |
19174 | } | |
19175 | ||
19176 | /* Handle DW_LNS_const_add_pc. */ | |
19177 | void handle_const_add_pc (); | |
19178 | ||
19179 | /* Handle DW_LNS_fixed_advance_pc. */ | |
19180 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
19181 | { | |
19182 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19183 | m_op_index = 0; | |
19184 | } | |
19185 | ||
19186 | /* Handle DW_LNS_copy. */ | |
19187 | void handle_copy () | |
19188 | { | |
19189 | record_line (false); | |
19190 | m_discriminator = 0; | |
19191 | } | |
19192 | ||
19193 | /* Handle DW_LNE_end_sequence. */ | |
19194 | void handle_end_sequence () | |
19195 | { | |
19196 | m_record_line_callback = ::record_line; | |
19197 | } | |
19198 | ||
19199 | private: | |
19200 | /* Advance the line by LINE_DELTA. */ | |
19201 | void advance_line (int line_delta) | |
19202 | { | |
19203 | m_line += line_delta; | |
19204 | ||
19205 | if (line_delta != 0) | |
19206 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
19207 | } |
19208 | ||
6f77053d PA |
19209 | gdbarch *m_gdbarch; |
19210 | ||
19211 | /* True if we're recording lines. | |
19212 | Otherwise we're building partial symtabs and are just interested in | |
19213 | finding include files mentioned by the line number program. */ | |
19214 | bool m_record_lines_p; | |
19215 | ||
8c43009f | 19216 | /* The line number header. */ |
6f77053d | 19217 | line_header *m_line_header; |
8c43009f | 19218 | |
6f77053d PA |
19219 | /* These are part of the standard DWARF line number state machine, |
19220 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 19221 | |
6f77053d | 19222 | unsigned char m_op_index = 0; |
8c43009f | 19223 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
19224 | file_name_index m_file = (file_name_index) 1; |
19225 | unsigned int m_line = 1; | |
19226 | ||
19227 | /* These are initialized in the constructor. */ | |
19228 | ||
19229 | CORE_ADDR m_address; | |
19230 | bool m_is_stmt; | |
19231 | unsigned int m_discriminator; | |
d9b3de22 DE |
19232 | |
19233 | /* Additional bits of state we need to track. */ | |
19234 | ||
19235 | /* The last file that we called dwarf2_start_subfile for. | |
19236 | This is only used for TLLs. */ | |
6f77053d | 19237 | unsigned int m_last_file = 0; |
d9b3de22 | 19238 | /* The last file a line number was recorded for. */ |
6f77053d | 19239 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
19240 | |
19241 | /* The function to call to record a line. */ | |
6f77053d | 19242 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
19243 | |
19244 | /* The last line number that was recorded, used to coalesce | |
19245 | consecutive entries for the same line. This can happen, for | |
19246 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
19247 | unsigned int m_last_line = 0; |
19248 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 19249 | }; |
d9b3de22 | 19250 | |
6f77053d PA |
19251 | void |
19252 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
19253 | { | |
19254 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
19255 | / m_line_header->maximum_ops_per_instruction) | |
19256 | * m_line_header->minimum_instruction_length); | |
19257 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19258 | m_op_index = ((m_op_index + adjust) | |
19259 | % m_line_header->maximum_ops_per_instruction); | |
19260 | } | |
d9b3de22 | 19261 | |
6f77053d PA |
19262 | void |
19263 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 19264 | { |
6f77053d PA |
19265 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
19266 | CORE_ADDR addr_adj = (((m_op_index | |
19267 | + (adj_opcode / m_line_header->line_range)) | |
19268 | / m_line_header->maximum_ops_per_instruction) | |
19269 | * m_line_header->minimum_instruction_length); | |
19270 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19271 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
19272 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 19273 | |
6f77053d PA |
19274 | int line_delta = (m_line_header->line_base |
19275 | + (adj_opcode % m_line_header->line_range)); | |
19276 | advance_line (line_delta); | |
19277 | record_line (false); | |
19278 | m_discriminator = 0; | |
19279 | } | |
d9b3de22 | 19280 | |
6f77053d PA |
19281 | void |
19282 | lnp_state_machine::handle_set_file (file_name_index file) | |
19283 | { | |
19284 | m_file = file; | |
19285 | ||
19286 | const file_entry *fe = current_file (); | |
19287 | if (fe == NULL) | |
19288 | dwarf2_debug_line_missing_file_complaint (); | |
19289 | else if (m_record_lines_p) | |
19290 | { | |
19291 | const char *dir = fe->include_dir (m_line_header); | |
19292 | ||
19293 | m_last_subfile = current_subfile; | |
19294 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
19295 | dwarf2_start_subfile (fe->name, dir); | |
19296 | } | |
19297 | } | |
19298 | ||
19299 | void | |
19300 | lnp_state_machine::handle_const_add_pc () | |
19301 | { | |
19302 | CORE_ADDR adjust | |
19303 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
19304 | ||
19305 | CORE_ADDR addr_adj | |
19306 | = (((m_op_index + adjust) | |
19307 | / m_line_header->maximum_ops_per_instruction) | |
19308 | * m_line_header->minimum_instruction_length); | |
19309 | ||
19310 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19311 | m_op_index = ((m_op_index + adjust) | |
19312 | % m_line_header->maximum_ops_per_instruction); | |
19313 | } | |
d9b3de22 | 19314 | |
c91513d8 PP |
19315 | /* Ignore this record_line request. */ |
19316 | ||
19317 | static void | |
19318 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
19319 | { | |
19320 | return; | |
19321 | } | |
19322 | ||
a05a36a5 DE |
19323 | /* Return non-zero if we should add LINE to the line number table. |
19324 | LINE is the line to add, LAST_LINE is the last line that was added, | |
19325 | LAST_SUBFILE is the subfile for LAST_LINE. | |
19326 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
19327 | had a non-zero discriminator. | |
19328 | ||
19329 | We have to be careful in the presence of discriminators. | |
19330 | E.g., for this line: | |
19331 | ||
19332 | for (i = 0; i < 100000; i++); | |
19333 | ||
19334 | clang can emit four line number entries for that one line, | |
19335 | each with a different discriminator. | |
19336 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19337 | ||
19338 | However, we want gdb to coalesce all four entries into one. | |
19339 | Otherwise the user could stepi into the middle of the line and | |
19340 | gdb would get confused about whether the pc really was in the | |
19341 | middle of the line. | |
19342 | ||
19343 | Things are further complicated by the fact that two consecutive | |
19344 | line number entries for the same line is a heuristic used by gcc | |
19345 | to denote the end of the prologue. So we can't just discard duplicate | |
19346 | entries, we have to be selective about it. The heuristic we use is | |
19347 | that we only collapse consecutive entries for the same line if at least | |
19348 | one of those entries has a non-zero discriminator. PR 17276. | |
19349 | ||
19350 | Note: Addresses in the line number state machine can never go backwards | |
19351 | within one sequence, thus this coalescing is ok. */ | |
19352 | ||
19353 | static int | |
19354 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
19355 | int line_has_non_zero_discriminator, | |
19356 | struct subfile *last_subfile) | |
19357 | { | |
19358 | if (current_subfile != last_subfile) | |
19359 | return 1; | |
19360 | if (line != last_line) | |
19361 | return 1; | |
19362 | /* Same line for the same file that we've seen already. | |
19363 | As a last check, for pr 17276, only record the line if the line | |
19364 | has never had a non-zero discriminator. */ | |
19365 | if (!line_has_non_zero_discriminator) | |
19366 | return 1; | |
19367 | return 0; | |
19368 | } | |
19369 | ||
252a6764 DE |
19370 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
19371 | in the line table of subfile SUBFILE. */ | |
19372 | ||
19373 | static void | |
d9b3de22 DE |
19374 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
19375 | unsigned int line, CORE_ADDR address, | |
19376 | record_line_ftype p_record_line) | |
252a6764 DE |
19377 | { |
19378 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19379 | ||
27e0867f DE |
19380 | if (dwarf_line_debug) |
19381 | { | |
19382 | fprintf_unfiltered (gdb_stdlog, | |
19383 | "Recording line %u, file %s, address %s\n", | |
19384 | line, lbasename (subfile->name), | |
19385 | paddress (gdbarch, address)); | |
19386 | } | |
19387 | ||
d5962de5 | 19388 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
19389 | } |
19390 | ||
19391 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19392 | Mark the end of a set of line number records. | |
d9b3de22 | 19393 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19394 | If SUBFILE is NULL the request is ignored. */ |
19395 | ||
19396 | static void | |
19397 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
19398 | CORE_ADDR address, record_line_ftype p_record_line) | |
19399 | { | |
27e0867f DE |
19400 | if (subfile == NULL) |
19401 | return; | |
19402 | ||
19403 | if (dwarf_line_debug) | |
19404 | { | |
19405 | fprintf_unfiltered (gdb_stdlog, | |
19406 | "Finishing current line, file %s, address %s\n", | |
19407 | lbasename (subfile->name), | |
19408 | paddress (gdbarch, address)); | |
19409 | } | |
19410 | ||
d9b3de22 DE |
19411 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
19412 | } | |
19413 | ||
6f77053d PA |
19414 | void |
19415 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19416 | { |
d9b3de22 DE |
19417 | if (dwarf_line_debug) |
19418 | { | |
19419 | fprintf_unfiltered (gdb_stdlog, | |
19420 | "Processing actual line %u: file %u," | |
19421 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
19422 | m_line, to_underlying (m_file), |
19423 | paddress (m_gdbarch, m_address), | |
19424 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
19425 | } |
19426 | ||
6f77053d | 19427 | file_entry *fe = current_file (); |
8c43009f PA |
19428 | |
19429 | if (fe == NULL) | |
d9b3de22 DE |
19430 | dwarf2_debug_line_missing_file_complaint (); |
19431 | /* For now we ignore lines not starting on an instruction boundary. | |
19432 | But not when processing end_sequence for compatibility with the | |
19433 | previous version of the code. */ | |
6f77053d | 19434 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 19435 | { |
8c43009f | 19436 | fe->included_p = 1; |
6f77053d | 19437 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 19438 | { |
6f77053d | 19439 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 19440 | { |
6f77053d PA |
19441 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
19442 | m_address, m_record_line_callback); | |
d9b3de22 DE |
19443 | } |
19444 | ||
19445 | if (!end_sequence) | |
19446 | { | |
6f77053d PA |
19447 | if (dwarf_record_line_p (m_line, m_last_line, |
19448 | m_line_has_non_zero_discriminator, | |
19449 | m_last_subfile)) | |
d9b3de22 | 19450 | { |
6f77053d PA |
19451 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
19452 | m_line, m_address, | |
19453 | m_record_line_callback); | |
d9b3de22 | 19454 | } |
6f77053d PA |
19455 | m_last_subfile = current_subfile; |
19456 | m_last_line = m_line; | |
d9b3de22 DE |
19457 | } |
19458 | } | |
19459 | } | |
19460 | } | |
19461 | ||
6f77053d PA |
19462 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
19463 | bool record_lines_p) | |
d9b3de22 | 19464 | { |
6f77053d PA |
19465 | m_gdbarch = arch; |
19466 | m_record_lines_p = record_lines_p; | |
19467 | m_line_header = lh; | |
d9b3de22 | 19468 | |
6f77053d | 19469 | m_record_line_callback = ::record_line; |
d9b3de22 | 19470 | |
d9b3de22 DE |
19471 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
19472 | was a line entry for it so that the backend has a chance to adjust it | |
19473 | and also record it in case it needs it. This is currently used by MIPS | |
19474 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
19475 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
19476 | m_is_stmt = lh->default_is_stmt; | |
19477 | m_discriminator = 0; | |
252a6764 DE |
19478 | } |
19479 | ||
6f77053d PA |
19480 | void |
19481 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
19482 | const gdb_byte *line_ptr, | |
19483 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
19484 | { |
19485 | /* If address < lowpc then it's not a usable value, it's outside the | |
19486 | pc range of the CU. However, we restrict the test to only address | |
19487 | values of zero to preserve GDB's previous behaviour which is to | |
19488 | handle the specific case of a function being GC'd by the linker. */ | |
19489 | ||
19490 | if (address == 0 && address < lowpc) | |
19491 | { | |
19492 | /* This line table is for a function which has been | |
19493 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
19494 | ||
19495 | struct objfile *objfile = cu->objfile; | |
19496 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
19497 | ||
19498 | complaint (&symfile_complaints, | |
19499 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
19500 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
19501 | m_record_line_callback = noop_record_line; |
19502 | /* Note: record_line_callback is left as noop_record_line until | |
19503 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
19504 | } |
19505 | } | |
19506 | ||
f3f5162e | 19507 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
19508 | Process the line number information in LH. |
19509 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
19510 | program in order to set included_p for every referenced header. */ | |
debd256d | 19511 | |
c906108c | 19512 | static void |
43f3e411 DE |
19513 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
19514 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 19515 | { |
d521ce57 TT |
19516 | const gdb_byte *line_ptr, *extended_end; |
19517 | const gdb_byte *line_end; | |
a8c50c1f | 19518 | unsigned int bytes_read, extended_len; |
699ca60a | 19519 | unsigned char op_code, extended_op; |
e142c38c DJ |
19520 | CORE_ADDR baseaddr; |
19521 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 19522 | bfd *abfd = objfile->obfd; |
fbf65064 | 19523 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
19524 | /* True if we're recording line info (as opposed to building partial |
19525 | symtabs and just interested in finding include files mentioned by | |
19526 | the line number program). */ | |
19527 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
19528 | |
19529 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19530 | |
debd256d JB |
19531 | line_ptr = lh->statement_program_start; |
19532 | line_end = lh->statement_program_end; | |
c906108c SS |
19533 | |
19534 | /* Read the statement sequences until there's nothing left. */ | |
19535 | while (line_ptr < line_end) | |
19536 | { | |
6f77053d PA |
19537 | /* The DWARF line number program state machine. Reset the state |
19538 | machine at the start of each sequence. */ | |
19539 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
19540 | bool end_sequence = false; | |
d9b3de22 | 19541 | |
8c43009f | 19542 | if (record_lines_p) |
c906108c | 19543 | { |
8c43009f PA |
19544 | /* Start a subfile for the current file of the state |
19545 | machine. */ | |
19546 | const file_entry *fe = state_machine.current_file (); | |
19547 | ||
19548 | if (fe != NULL) | |
19549 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
19550 | } |
19551 | ||
a738430d | 19552 | /* Decode the table. */ |
d9b3de22 | 19553 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
19554 | { |
19555 | op_code = read_1_byte (abfd, line_ptr); | |
19556 | line_ptr += 1; | |
9aa1fe7e | 19557 | |
debd256d | 19558 | if (op_code >= lh->opcode_base) |
6e70227d | 19559 | { |
8e07a239 | 19560 | /* Special opcode. */ |
6f77053d | 19561 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
19562 | } |
19563 | else switch (op_code) | |
c906108c SS |
19564 | { |
19565 | case DW_LNS_extended_op: | |
3e43a32a MS |
19566 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
19567 | &bytes_read); | |
473b7be6 | 19568 | line_ptr += bytes_read; |
a8c50c1f | 19569 | extended_end = line_ptr + extended_len; |
c906108c SS |
19570 | extended_op = read_1_byte (abfd, line_ptr); |
19571 | line_ptr += 1; | |
19572 | switch (extended_op) | |
19573 | { | |
19574 | case DW_LNE_end_sequence: | |
6f77053d PA |
19575 | state_machine.handle_end_sequence (); |
19576 | end_sequence = true; | |
c906108c SS |
19577 | break; |
19578 | case DW_LNE_set_address: | |
d9b3de22 DE |
19579 | { |
19580 | CORE_ADDR address | |
19581 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 19582 | line_ptr += bytes_read; |
6f77053d PA |
19583 | |
19584 | state_machine.check_line_address (cu, line_ptr, | |
19585 | lowpc, address); | |
19586 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 19587 | } |
c906108c SS |
19588 | break; |
19589 | case DW_LNE_define_file: | |
debd256d | 19590 | { |
d521ce57 | 19591 | const char *cur_file; |
ecfb656c PA |
19592 | unsigned int mod_time, length; |
19593 | dir_index dindex; | |
6e70227d | 19594 | |
3e43a32a MS |
19595 | cur_file = read_direct_string (abfd, line_ptr, |
19596 | &bytes_read); | |
debd256d | 19597 | line_ptr += bytes_read; |
ecfb656c | 19598 | dindex = (dir_index) |
debd256d JB |
19599 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
19600 | line_ptr += bytes_read; | |
19601 | mod_time = | |
19602 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19603 | line_ptr += bytes_read; | |
19604 | length = | |
19605 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19606 | line_ptr += bytes_read; | |
ecfb656c | 19607 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 19608 | } |
c906108c | 19609 | break; |
d0c6ba3d | 19610 | case DW_LNE_set_discriminator: |
6f77053d PA |
19611 | { |
19612 | /* The discriminator is not interesting to the | |
19613 | debugger; just ignore it. We still need to | |
19614 | check its value though: | |
19615 | if there are consecutive entries for the same | |
19616 | (non-prologue) line we want to coalesce them. | |
19617 | PR 17276. */ | |
19618 | unsigned int discr | |
19619 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19620 | line_ptr += bytes_read; | |
19621 | ||
19622 | state_machine.handle_set_discriminator (discr); | |
19623 | } | |
d0c6ba3d | 19624 | break; |
c906108c | 19625 | default: |
4d3c2250 | 19626 | complaint (&symfile_complaints, |
e2e0b3e5 | 19627 | _("mangled .debug_line section")); |
debd256d | 19628 | return; |
c906108c | 19629 | } |
a8c50c1f DJ |
19630 | /* Make sure that we parsed the extended op correctly. If e.g. |
19631 | we expected a different address size than the producer used, | |
19632 | we may have read the wrong number of bytes. */ | |
19633 | if (line_ptr != extended_end) | |
19634 | { | |
19635 | complaint (&symfile_complaints, | |
19636 | _("mangled .debug_line section")); | |
19637 | return; | |
19638 | } | |
c906108c SS |
19639 | break; |
19640 | case DW_LNS_copy: | |
6f77053d | 19641 | state_machine.handle_copy (); |
c906108c SS |
19642 | break; |
19643 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
19644 | { |
19645 | CORE_ADDR adjust | |
19646 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 19647 | line_ptr += bytes_read; |
6f77053d PA |
19648 | |
19649 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 19650 | } |
c906108c SS |
19651 | break; |
19652 | case DW_LNS_advance_line: | |
a05a36a5 DE |
19653 | { |
19654 | int line_delta | |
19655 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 19656 | line_ptr += bytes_read; |
6f77053d PA |
19657 | |
19658 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 19659 | } |
c906108c SS |
19660 | break; |
19661 | case DW_LNS_set_file: | |
d9b3de22 | 19662 | { |
6f77053d | 19663 | file_name_index file |
ecfb656c PA |
19664 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
19665 | &bytes_read); | |
d9b3de22 | 19666 | line_ptr += bytes_read; |
8c43009f | 19667 | |
6f77053d | 19668 | state_machine.handle_set_file (file); |
d9b3de22 | 19669 | } |
c906108c SS |
19670 | break; |
19671 | case DW_LNS_set_column: | |
0ad93d4f | 19672 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
19673 | line_ptr += bytes_read; |
19674 | break; | |
19675 | case DW_LNS_negate_stmt: | |
6f77053d | 19676 | state_machine.handle_negate_stmt (); |
c906108c SS |
19677 | break; |
19678 | case DW_LNS_set_basic_block: | |
c906108c | 19679 | break; |
c2c6d25f JM |
19680 | /* Add to the address register of the state machine the |
19681 | address increment value corresponding to special opcode | |
a738430d MK |
19682 | 255. I.e., this value is scaled by the minimum |
19683 | instruction length since special opcode 255 would have | |
b021a221 | 19684 | scaled the increment. */ |
c906108c | 19685 | case DW_LNS_const_add_pc: |
6f77053d | 19686 | state_machine.handle_const_add_pc (); |
c906108c SS |
19687 | break; |
19688 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 19689 | { |
6f77053d | 19690 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 19691 | line_ptr += 2; |
6f77053d PA |
19692 | |
19693 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 19694 | } |
c906108c | 19695 | break; |
9aa1fe7e | 19696 | default: |
a738430d MK |
19697 | { |
19698 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 19699 | int i; |
a738430d | 19700 | |
debd256d | 19701 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
19702 | { |
19703 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19704 | line_ptr += bytes_read; | |
19705 | } | |
19706 | } | |
c906108c SS |
19707 | } |
19708 | } | |
d9b3de22 DE |
19709 | |
19710 | if (!end_sequence) | |
19711 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
19712 | ||
19713 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
19714 | in which case we still finish recording the last line). */ | |
6f77053d | 19715 | state_machine.record_line (true); |
c906108c | 19716 | } |
f3f5162e DE |
19717 | } |
19718 | ||
19719 | /* Decode the Line Number Program (LNP) for the given line_header | |
19720 | structure and CU. The actual information extracted and the type | |
19721 | of structures created from the LNP depends on the value of PST. | |
19722 | ||
19723 | 1. If PST is NULL, then this procedure uses the data from the program | |
19724 | to create all necessary symbol tables, and their linetables. | |
19725 | ||
19726 | 2. If PST is not NULL, this procedure reads the program to determine | |
19727 | the list of files included by the unit represented by PST, and | |
19728 | builds all the associated partial symbol tables. | |
19729 | ||
19730 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
19731 | It is used for relative paths in the line table. | |
19732 | NOTE: When processing partial symtabs (pst != NULL), | |
19733 | comp_dir == pst->dirname. | |
19734 | ||
19735 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
19736 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
19737 | symtab we don't use it in the name of the psymtabs we create. | |
19738 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
19739 | A good testcase for this is mb-inline.exp. |
19740 | ||
527f3840 JK |
19741 | LOWPC is the lowest address in CU (or 0 if not known). |
19742 | ||
19743 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
19744 | for its PC<->lines mapping information. Otherwise only the filename | |
19745 | table is read in. */ | |
f3f5162e DE |
19746 | |
19747 | static void | |
19748 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 19749 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 19750 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
19751 | { |
19752 | struct objfile *objfile = cu->objfile; | |
19753 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 19754 | |
527f3840 JK |
19755 | if (decode_mapping) |
19756 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
19757 | |
19758 | if (decode_for_pst_p) | |
19759 | { | |
19760 | int file_index; | |
19761 | ||
19762 | /* Now that we're done scanning the Line Header Program, we can | |
19763 | create the psymtab of each included file. */ | |
fff8551c | 19764 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
19765 | if (lh->file_names[file_index].included_p == 1) |
19766 | { | |
d521ce57 | 19767 | const char *include_name = |
c6da4cef DE |
19768 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
19769 | if (include_name != NULL) | |
aaa75496 JB |
19770 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
19771 | } | |
19772 | } | |
cb1df416 DJ |
19773 | else |
19774 | { | |
19775 | /* Make sure a symtab is created for every file, even files | |
19776 | which contain only variables (i.e. no code with associated | |
19777 | line numbers). */ | |
43f3e411 | 19778 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 19779 | int i; |
cb1df416 | 19780 | |
fff8551c | 19781 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 19782 | { |
8c43009f | 19783 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 19784 | |
8c43009f | 19785 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 19786 | |
cb1df416 | 19787 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
19788 | { |
19789 | current_subfile->symtab | |
19790 | = allocate_symtab (cust, current_subfile->name); | |
19791 | } | |
8c43009f | 19792 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
19793 | } |
19794 | } | |
c906108c SS |
19795 | } |
19796 | ||
19797 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
19798 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 19799 | or NULL if not known. |
c906108c SS |
19800 | This routine tries to keep line numbers from identical absolute and |
19801 | relative file names in a common subfile. | |
19802 | ||
19803 | Using the `list' example from the GDB testsuite, which resides in | |
19804 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
19805 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
19806 | ||
c5aa993b | 19807 | DW_AT_name: /srcdir/list0.c |
4d663531 | 19808 | DW_AT_comp_dir: /compdir |
357e46e7 | 19809 | files.files[0].name: list0.h |
c5aa993b | 19810 | files.files[0].dir: /srcdir |
357e46e7 | 19811 | files.files[1].name: list0.c |
c5aa993b | 19812 | files.files[1].dir: /srcdir |
c906108c SS |
19813 | |
19814 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
19815 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
19816 | start_subfile will ensure that this happens provided that we pass the | |
19817 | concatenation of files.files[1].dir and files.files[1].name as the | |
19818 | subfile's name. */ | |
c906108c SS |
19819 | |
19820 | static void | |
4d663531 | 19821 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 19822 | { |
d521ce57 | 19823 | char *copy = NULL; |
4f1520fb | 19824 | |
4d663531 | 19825 | /* In order not to lose the line information directory, |
4f1520fb FR |
19826 | we concatenate it to the filename when it makes sense. |
19827 | Note that the Dwarf3 standard says (speaking of filenames in line | |
19828 | information): ``The directory index is ignored for file names | |
19829 | that represent full path names''. Thus ignoring dirname in the | |
19830 | `else' branch below isn't an issue. */ | |
c906108c | 19831 | |
d5166ae1 | 19832 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
19833 | { |
19834 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
19835 | filename = copy; | |
19836 | } | |
c906108c | 19837 | |
4d663531 | 19838 | start_subfile (filename); |
4f1520fb | 19839 | |
d521ce57 TT |
19840 | if (copy != NULL) |
19841 | xfree (copy); | |
c906108c SS |
19842 | } |
19843 | ||
f4dc4d17 DE |
19844 | /* Start a symtab for DWARF. |
19845 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
19846 | ||
43f3e411 | 19847 | static struct compunit_symtab * |
f4dc4d17 | 19848 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 19849 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 19850 | { |
43f3e411 | 19851 | struct compunit_symtab *cust |
5ffa0793 | 19852 | = start_symtab (cu->objfile, name, comp_dir, low_pc, cu->language); |
43f3e411 | 19853 | |
f4dc4d17 DE |
19854 | record_debugformat ("DWARF 2"); |
19855 | record_producer (cu->producer); | |
19856 | ||
19857 | /* We assume that we're processing GCC output. */ | |
19858 | processing_gcc_compilation = 2; | |
19859 | ||
4d4ec4e5 | 19860 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
19861 | |
19862 | return cust; | |
f4dc4d17 DE |
19863 | } |
19864 | ||
4c2df51b DJ |
19865 | static void |
19866 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 19867 | struct dwarf2_cu *cu) |
4c2df51b | 19868 | { |
e7c27a73 DJ |
19869 | struct objfile *objfile = cu->objfile; |
19870 | struct comp_unit_head *cu_header = &cu->header; | |
19871 | ||
4c2df51b DJ |
19872 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
19873 | code here to turn a symbol with DW_AT_external and a | |
19874 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
19875 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
19876 | with some versions of binutils) where shared libraries could have | |
19877 | relocations against symbols in their debug information - the | |
19878 | minimal symbol would have the right address, but the debug info | |
19879 | would not. It's no longer necessary, because we will explicitly | |
19880 | apply relocations when we read in the debug information now. */ | |
19881 | ||
19882 | /* A DW_AT_location attribute with no contents indicates that a | |
19883 | variable has been optimized away. */ | |
19884 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
19885 | { | |
f1e6e072 | 19886 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
19887 | return; |
19888 | } | |
19889 | ||
19890 | /* Handle one degenerate form of location expression specially, to | |
19891 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
19892 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
19893 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
19894 | |
19895 | if (attr_form_is_block (attr) | |
3019eac3 DE |
19896 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
19897 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
19898 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
19899 | && (DW_BLOCK (attr)->size | |
19900 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 19901 | { |
891d2f0b | 19902 | unsigned int dummy; |
4c2df51b | 19903 | |
3019eac3 DE |
19904 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
19905 | SYMBOL_VALUE_ADDRESS (sym) = | |
19906 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
19907 | else | |
19908 | SYMBOL_VALUE_ADDRESS (sym) = | |
19909 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 19910 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
19911 | fixup_symbol_section (sym, objfile); |
19912 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
19913 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
19914 | return; |
19915 | } | |
19916 | ||
19917 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
19918 | expression evaluator, and use LOC_COMPUTED only when necessary | |
19919 | (i.e. when the value of a register or memory location is | |
19920 | referenced, or a thread-local block, etc.). Then again, it might | |
19921 | not be worthwhile. I'm assuming that it isn't unless performance | |
19922 | or memory numbers show me otherwise. */ | |
19923 | ||
f1e6e072 | 19924 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19925 | |
f1e6e072 | 19926 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19927 | cu->has_loclist = 1; |
4c2df51b DJ |
19928 | } |
19929 | ||
c906108c SS |
19930 | /* Given a pointer to a DWARF information entry, figure out if we need |
19931 | to make a symbol table entry for it, and if so, create a new entry | |
19932 | and return a pointer to it. | |
19933 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19934 | used the passed type. |
19935 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19936 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19937 | |
19938 | static struct symbol * | |
34eaf542 TT |
19939 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19940 | struct symbol *space) | |
c906108c | 19941 | { |
e7c27a73 | 19942 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19943 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19944 | struct symbol *sym = NULL; |
15d034d0 | 19945 | const char *name; |
c906108c SS |
19946 | struct attribute *attr = NULL; |
19947 | struct attribute *attr2 = NULL; | |
e142c38c | 19948 | CORE_ADDR baseaddr; |
e37fd15a SW |
19949 | struct pending **list_to_add = NULL; |
19950 | ||
edb3359d | 19951 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19952 | |
19953 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19954 | |
94af9270 | 19955 | name = dwarf2_name (die, cu); |
c906108c SS |
19956 | if (name) |
19957 | { | |
94af9270 | 19958 | const char *linkagename; |
34eaf542 | 19959 | int suppress_add = 0; |
94af9270 | 19960 | |
34eaf542 TT |
19961 | if (space) |
19962 | sym = space; | |
19963 | else | |
e623cf5d | 19964 | sym = allocate_symbol (objfile); |
c906108c | 19965 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19966 | |
19967 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19968 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19969 | linkagename = dwarf2_physname (name, die, cu); |
19970 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19971 | |
f55ee35c JK |
19972 | /* Fortran does not have mangling standard and the mangling does differ |
19973 | between gfortran, iFort etc. */ | |
19974 | if (cu->language == language_fortran | |
b250c185 | 19975 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19976 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19977 | dwarf2_full_name (name, die, cu), |
29df156d | 19978 | NULL); |
f55ee35c | 19979 | |
c906108c | 19980 | /* Default assumptions. |
c5aa993b | 19981 | Use the passed type or decode it from the die. */ |
176620f1 | 19982 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19983 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19984 | if (type != NULL) |
19985 | SYMBOL_TYPE (sym) = type; | |
19986 | else | |
e7c27a73 | 19987 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19988 | attr = dwarf2_attr (die, |
19989 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19990 | cu); | |
c906108c SS |
19991 | if (attr) |
19992 | { | |
19993 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19994 | } | |
cb1df416 | 19995 | |
edb3359d DJ |
19996 | attr = dwarf2_attr (die, |
19997 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19998 | cu); | |
cb1df416 DJ |
19999 | if (attr) |
20000 | { | |
ecfb656c | 20001 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 20002 | struct file_entry *fe; |
9a619af0 | 20003 | |
ecfb656c PA |
20004 | if (cu->line_header != NULL) |
20005 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
20006 | else |
20007 | fe = NULL; | |
20008 | ||
20009 | if (fe == NULL) | |
cb1df416 DJ |
20010 | complaint (&symfile_complaints, |
20011 | _("file index out of range")); | |
8c43009f PA |
20012 | else |
20013 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
20014 | } |
20015 | ||
c906108c SS |
20016 | switch (die->tag) |
20017 | { | |
20018 | case DW_TAG_label: | |
e142c38c | 20019 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 20020 | if (attr) |
3e29f34a MR |
20021 | { |
20022 | CORE_ADDR addr; | |
20023 | ||
20024 | addr = attr_value_as_address (attr); | |
20025 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
20026 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
20027 | } | |
0f5238ed TT |
20028 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
20029 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 20030 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 20031 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
20032 | break; |
20033 | case DW_TAG_subprogram: | |
20034 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20035 | finish_block. */ | |
f1e6e072 | 20036 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 20037 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
20038 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
20039 | || cu->language == language_ada) | |
c906108c | 20040 | { |
2cfa0c8d JB |
20041 | /* Subprograms marked external are stored as a global symbol. |
20042 | Ada subprograms, whether marked external or not, are always | |
20043 | stored as a global symbol, because we want to be able to | |
20044 | access them globally. For instance, we want to be able | |
20045 | to break on a nested subprogram without having to | |
20046 | specify the context. */ | |
e37fd15a | 20047 | list_to_add = &global_symbols; |
c906108c SS |
20048 | } |
20049 | else | |
20050 | { | |
e37fd15a | 20051 | list_to_add = cu->list_in_scope; |
c906108c SS |
20052 | } |
20053 | break; | |
edb3359d DJ |
20054 | case DW_TAG_inlined_subroutine: |
20055 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20056 | finish_block. */ | |
f1e6e072 | 20057 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 20058 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 20059 | list_to_add = cu->list_in_scope; |
edb3359d | 20060 | break; |
34eaf542 TT |
20061 | case DW_TAG_template_value_param: |
20062 | suppress_add = 1; | |
20063 | /* Fall through. */ | |
72929c62 | 20064 | case DW_TAG_constant: |
c906108c | 20065 | case DW_TAG_variable: |
254e6b9e | 20066 | case DW_TAG_member: |
0963b4bd MS |
20067 | /* Compilation with minimal debug info may result in |
20068 | variables with missing type entries. Change the | |
20069 | misleading `void' type to something sensible. */ | |
c906108c | 20070 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 20071 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 20072 | |
e142c38c | 20073 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
20074 | /* In the case of DW_TAG_member, we should only be called for |
20075 | static const members. */ | |
20076 | if (die->tag == DW_TAG_member) | |
20077 | { | |
3863f96c DE |
20078 | /* dwarf2_add_field uses die_is_declaration, |
20079 | so we do the same. */ | |
254e6b9e DE |
20080 | gdb_assert (die_is_declaration (die, cu)); |
20081 | gdb_assert (attr); | |
20082 | } | |
c906108c SS |
20083 | if (attr) |
20084 | { | |
e7c27a73 | 20085 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 20086 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 20087 | if (!suppress_add) |
34eaf542 TT |
20088 | { |
20089 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 20090 | list_to_add = &global_symbols; |
34eaf542 | 20091 | else |
e37fd15a | 20092 | list_to_add = cu->list_in_scope; |
34eaf542 | 20093 | } |
c906108c SS |
20094 | break; |
20095 | } | |
e142c38c | 20096 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
20097 | if (attr) |
20098 | { | |
e7c27a73 | 20099 | var_decode_location (attr, sym, cu); |
e142c38c | 20100 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
20101 | |
20102 | /* Fortran explicitly imports any global symbols to the local | |
20103 | scope by DW_TAG_common_block. */ | |
20104 | if (cu->language == language_fortran && die->parent | |
20105 | && die->parent->tag == DW_TAG_common_block) | |
20106 | attr2 = NULL; | |
20107 | ||
caac4577 JG |
20108 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20109 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
20110 | && !dwarf2_per_objfile->has_section_at_zero) | |
20111 | { | |
20112 | /* When a static variable is eliminated by the linker, | |
20113 | the corresponding debug information is not stripped | |
20114 | out, but the variable address is set to null; | |
20115 | do not add such variables into symbol table. */ | |
20116 | } | |
20117 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 20118 | { |
f55ee35c JK |
20119 | /* Workaround gfortran PR debug/40040 - it uses |
20120 | DW_AT_location for variables in -fPIC libraries which may | |
20121 | get overriden by other libraries/executable and get | |
20122 | a different address. Resolve it by the minimal symbol | |
20123 | which may come from inferior's executable using copy | |
20124 | relocation. Make this workaround only for gfortran as for | |
20125 | other compilers GDB cannot guess the minimal symbol | |
20126 | Fortran mangling kind. */ | |
20127 | if (cu->language == language_fortran && die->parent | |
20128 | && die->parent->tag == DW_TAG_module | |
20129 | && cu->producer | |
28586665 | 20130 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 20131 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 20132 | |
1c809c68 TT |
20133 | /* A variable with DW_AT_external is never static, |
20134 | but it may be block-scoped. */ | |
20135 | list_to_add = (cu->list_in_scope == &file_symbols | |
20136 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 20137 | } |
c906108c | 20138 | else |
e37fd15a | 20139 | list_to_add = cu->list_in_scope; |
c906108c SS |
20140 | } |
20141 | else | |
20142 | { | |
20143 | /* We do not know the address of this symbol. | |
c5aa993b JM |
20144 | If it is an external symbol and we have type information |
20145 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
20146 | The address of the variable will then be determined from | |
20147 | the minimal symbol table whenever the variable is | |
20148 | referenced. */ | |
e142c38c | 20149 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
20150 | |
20151 | /* Fortran explicitly imports any global symbols to the local | |
20152 | scope by DW_TAG_common_block. */ | |
20153 | if (cu->language == language_fortran && die->parent | |
20154 | && die->parent->tag == DW_TAG_common_block) | |
20155 | { | |
20156 | /* SYMBOL_CLASS doesn't matter here because | |
20157 | read_common_block is going to reset it. */ | |
20158 | if (!suppress_add) | |
20159 | list_to_add = cu->list_in_scope; | |
20160 | } | |
20161 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
20162 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 20163 | { |
0fe7935b DJ |
20164 | /* A variable with DW_AT_external is never static, but it |
20165 | may be block-scoped. */ | |
20166 | list_to_add = (cu->list_in_scope == &file_symbols | |
20167 | ? &global_symbols : cu->list_in_scope); | |
20168 | ||
f1e6e072 | 20169 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 20170 | } |
442ddf59 JK |
20171 | else if (!die_is_declaration (die, cu)) |
20172 | { | |
20173 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
20174 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
20175 | if (!suppress_add) |
20176 | list_to_add = cu->list_in_scope; | |
442ddf59 | 20177 | } |
c906108c SS |
20178 | } |
20179 | break; | |
20180 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
20181 | /* If we are inside a function, mark this as an argument. If |
20182 | not, we might be looking at an argument to an inlined function | |
20183 | when we do not have enough information to show inlined frames; | |
20184 | pretend it's a local variable in that case so that the user can | |
20185 | still see it. */ | |
20186 | if (context_stack_depth > 0 | |
20187 | && context_stack[context_stack_depth - 1].name != NULL) | |
20188 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 20189 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
20190 | if (attr) |
20191 | { | |
e7c27a73 | 20192 | var_decode_location (attr, sym, cu); |
c906108c | 20193 | } |
e142c38c | 20194 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
20195 | if (attr) |
20196 | { | |
e7c27a73 | 20197 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20198 | } |
f346a30d | 20199 | |
e37fd15a | 20200 | list_to_add = cu->list_in_scope; |
c906108c SS |
20201 | break; |
20202 | case DW_TAG_unspecified_parameters: | |
20203 | /* From varargs functions; gdb doesn't seem to have any | |
20204 | interest in this information, so just ignore it for now. | |
20205 | (FIXME?) */ | |
20206 | break; | |
34eaf542 TT |
20207 | case DW_TAG_template_type_param: |
20208 | suppress_add = 1; | |
20209 | /* Fall through. */ | |
c906108c | 20210 | case DW_TAG_class_type: |
680b30c7 | 20211 | case DW_TAG_interface_type: |
c906108c SS |
20212 | case DW_TAG_structure_type: |
20213 | case DW_TAG_union_type: | |
72019c9c | 20214 | case DW_TAG_set_type: |
c906108c | 20215 | case DW_TAG_enumeration_type: |
f1e6e072 | 20216 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20217 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 20218 | |
63d06c5c | 20219 | { |
9c37b5ae | 20220 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
20221 | really ever be static objects: otherwise, if you try |
20222 | to, say, break of a class's method and you're in a file | |
20223 | which doesn't mention that class, it won't work unless | |
20224 | the check for all static symbols in lookup_symbol_aux | |
20225 | saves you. See the OtherFileClass tests in | |
20226 | gdb.c++/namespace.exp. */ | |
20227 | ||
e37fd15a | 20228 | if (!suppress_add) |
34eaf542 | 20229 | { |
34eaf542 | 20230 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 20231 | && cu->language == language_cplus |
34eaf542 | 20232 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 20233 | |
64382290 | 20234 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 20235 | ... }" also defines a typedef for "foo". */ |
64382290 | 20236 | if (cu->language == language_cplus |
45280282 | 20237 | || cu->language == language_ada |
c44af4eb TT |
20238 | || cu->language == language_d |
20239 | || cu->language == language_rust) | |
64382290 TT |
20240 | { |
20241 | /* The symbol's name is already allocated along | |
20242 | with this objfile, so we don't need to | |
20243 | duplicate it for the type. */ | |
20244 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
20245 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
20246 | } | |
63d06c5c DC |
20247 | } |
20248 | } | |
c906108c SS |
20249 | break; |
20250 | case DW_TAG_typedef: | |
f1e6e072 | 20251 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 20252 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20253 | list_to_add = cu->list_in_scope; |
63d06c5c | 20254 | break; |
c906108c | 20255 | case DW_TAG_base_type: |
a02abb62 | 20256 | case DW_TAG_subrange_type: |
f1e6e072 | 20257 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20258 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20259 | list_to_add = cu->list_in_scope; |
c906108c SS |
20260 | break; |
20261 | case DW_TAG_enumerator: | |
e142c38c | 20262 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
20263 | if (attr) |
20264 | { | |
e7c27a73 | 20265 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20266 | } |
63d06c5c DC |
20267 | { |
20268 | /* NOTE: carlton/2003-11-10: See comment above in the | |
20269 | DW_TAG_class_type, etc. block. */ | |
20270 | ||
e142c38c | 20271 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 20272 | && cu->language == language_cplus |
e142c38c | 20273 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 20274 | } |
c906108c | 20275 | break; |
74921315 | 20276 | case DW_TAG_imported_declaration: |
5c4e30ca | 20277 | case DW_TAG_namespace: |
f1e6e072 | 20278 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 20279 | list_to_add = &global_symbols; |
5c4e30ca | 20280 | break; |
530e8392 KB |
20281 | case DW_TAG_module: |
20282 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
20283 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
20284 | list_to_add = &global_symbols; | |
20285 | break; | |
4357ac6c | 20286 | case DW_TAG_common_block: |
f1e6e072 | 20287 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
20288 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
20289 | add_symbol_to_list (sym, cu->list_in_scope); | |
20290 | break; | |
c906108c SS |
20291 | default: |
20292 | /* Not a tag we recognize. Hopefully we aren't processing | |
20293 | trash data, but since we must specifically ignore things | |
20294 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 20295 | this point. */ |
e2e0b3e5 | 20296 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 20297 | dwarf_tag_name (die->tag)); |
c906108c SS |
20298 | break; |
20299 | } | |
df8a16a1 | 20300 | |
e37fd15a SW |
20301 | if (suppress_add) |
20302 | { | |
20303 | sym->hash_next = objfile->template_symbols; | |
20304 | objfile->template_symbols = sym; | |
20305 | list_to_add = NULL; | |
20306 | } | |
20307 | ||
20308 | if (list_to_add != NULL) | |
20309 | add_symbol_to_list (sym, list_to_add); | |
20310 | ||
df8a16a1 DJ |
20311 | /* For the benefit of old versions of GCC, check for anonymous |
20312 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 20313 | if (!cu->processing_has_namespace_info |
94af9270 | 20314 | && cu->language == language_cplus) |
a10964d1 | 20315 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
20316 | } |
20317 | return (sym); | |
20318 | } | |
20319 | ||
34eaf542 TT |
20320 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
20321 | ||
20322 | static struct symbol * | |
20323 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
20324 | { | |
20325 | return new_symbol_full (die, type, cu, NULL); | |
20326 | } | |
20327 | ||
98bfdba5 PA |
20328 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20329 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20330 | standard (v4) is not entirely clear about the meaning of using | |
20331 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20332 | wider than the data. The conclusion of a discussion on the DWARF | |
20333 | list was that this is unspecified. We choose to always zero-extend | |
20334 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20335 | |
98bfdba5 | 20336 | static gdb_byte * |
ff39bb5e | 20337 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20338 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20339 | { |
e7c27a73 | 20340 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
20341 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20342 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20343 | LONGEST l = DW_UNSND (attr); |
20344 | ||
20345 | if (bits < sizeof (*value) * 8) | |
20346 | { | |
20347 | l &= ((LONGEST) 1 << bits) - 1; | |
20348 | *value = l; | |
20349 | } | |
20350 | else if (bits == sizeof (*value) * 8) | |
20351 | *value = l; | |
20352 | else | |
20353 | { | |
224c3ddb | 20354 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20355 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20356 | return bytes; | |
20357 | } | |
20358 | ||
20359 | return NULL; | |
20360 | } | |
20361 | ||
20362 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20363 | the value does not fit in *VALUE, set *BYTES - either already | |
20364 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20365 | or, set *BATON, if we translated the constant to a location | |
20366 | expression. */ | |
20367 | ||
20368 | static void | |
ff39bb5e | 20369 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20370 | const char *name, struct obstack *obstack, |
20371 | struct dwarf2_cu *cu, | |
d521ce57 | 20372 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20373 | struct dwarf2_locexpr_baton **baton) |
20374 | { | |
20375 | struct objfile *objfile = cu->objfile; | |
20376 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 20377 | struct dwarf_block *blk; |
98bfdba5 PA |
20378 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20379 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20380 | ||
20381 | *value = 0; | |
20382 | *bytes = NULL; | |
20383 | *baton = NULL; | |
c906108c SS |
20384 | |
20385 | switch (attr->form) | |
20386 | { | |
20387 | case DW_FORM_addr: | |
3019eac3 | 20388 | case DW_FORM_GNU_addr_index: |
ac56253d | 20389 | { |
ac56253d TT |
20390 | gdb_byte *data; |
20391 | ||
98bfdba5 PA |
20392 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20393 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20394 | cu_header->addr_size, |
98bfdba5 | 20395 | TYPE_LENGTH (type)); |
ac56253d TT |
20396 | /* Symbols of this form are reasonably rare, so we just |
20397 | piggyback on the existing location code rather than writing | |
20398 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20399 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20400 | (*baton)->per_cu = cu->per_cu; |
20401 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20402 | |
98bfdba5 | 20403 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20404 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20405 | (*baton)->data = data; |
ac56253d TT |
20406 | |
20407 | data[0] = DW_OP_addr; | |
20408 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20409 | byte_order, DW_ADDR (attr)); | |
20410 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20411 | } |
c906108c | 20412 | break; |
4ac36638 | 20413 | case DW_FORM_string: |
93b5768b | 20414 | case DW_FORM_strp: |
3019eac3 | 20415 | case DW_FORM_GNU_str_index: |
36586728 | 20416 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
20417 | /* DW_STRING is already allocated on the objfile obstack, point |
20418 | directly to it. */ | |
d521ce57 | 20419 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 20420 | break; |
c906108c SS |
20421 | case DW_FORM_block1: |
20422 | case DW_FORM_block2: | |
20423 | case DW_FORM_block4: | |
20424 | case DW_FORM_block: | |
2dc7f7b3 | 20425 | case DW_FORM_exprloc: |
0224619f | 20426 | case DW_FORM_data16: |
c906108c | 20427 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
20428 | if (TYPE_LENGTH (type) != blk->size) |
20429 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
20430 | TYPE_LENGTH (type)); | |
20431 | *bytes = blk->data; | |
c906108c | 20432 | break; |
2df3850c JM |
20433 | |
20434 | /* The DW_AT_const_value attributes are supposed to carry the | |
20435 | symbol's value "represented as it would be on the target | |
20436 | architecture." By the time we get here, it's already been | |
20437 | converted to host endianness, so we just need to sign- or | |
20438 | zero-extend it as appropriate. */ | |
20439 | case DW_FORM_data1: | |
3aef2284 | 20440 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 20441 | break; |
c906108c | 20442 | case DW_FORM_data2: |
3aef2284 | 20443 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 20444 | break; |
c906108c | 20445 | case DW_FORM_data4: |
3aef2284 | 20446 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 20447 | break; |
c906108c | 20448 | case DW_FORM_data8: |
3aef2284 | 20449 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
20450 | break; |
20451 | ||
c906108c | 20452 | case DW_FORM_sdata: |
663c44ac | 20453 | case DW_FORM_implicit_const: |
98bfdba5 | 20454 | *value = DW_SND (attr); |
2df3850c JM |
20455 | break; |
20456 | ||
c906108c | 20457 | case DW_FORM_udata: |
98bfdba5 | 20458 | *value = DW_UNSND (attr); |
c906108c | 20459 | break; |
2df3850c | 20460 | |
c906108c | 20461 | default: |
4d3c2250 | 20462 | complaint (&symfile_complaints, |
e2e0b3e5 | 20463 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 20464 | dwarf_form_name (attr->form)); |
98bfdba5 | 20465 | *value = 0; |
c906108c SS |
20466 | break; |
20467 | } | |
20468 | } | |
20469 | ||
2df3850c | 20470 | |
98bfdba5 PA |
20471 | /* Copy constant value from an attribute to a symbol. */ |
20472 | ||
2df3850c | 20473 | static void |
ff39bb5e | 20474 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 20475 | struct dwarf2_cu *cu) |
2df3850c | 20476 | { |
98bfdba5 | 20477 | struct objfile *objfile = cu->objfile; |
12df843f | 20478 | LONGEST value; |
d521ce57 | 20479 | const gdb_byte *bytes; |
98bfdba5 | 20480 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 20481 | |
98bfdba5 PA |
20482 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
20483 | SYMBOL_PRINT_NAME (sym), | |
20484 | &objfile->objfile_obstack, cu, | |
20485 | &value, &bytes, &baton); | |
2df3850c | 20486 | |
98bfdba5 PA |
20487 | if (baton != NULL) |
20488 | { | |
98bfdba5 | 20489 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 20490 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
20491 | } |
20492 | else if (bytes != NULL) | |
20493 | { | |
20494 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 20495 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
20496 | } |
20497 | else | |
20498 | { | |
20499 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 20500 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 20501 | } |
2df3850c JM |
20502 | } |
20503 | ||
c906108c SS |
20504 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
20505 | ||
20506 | static struct type * | |
e7c27a73 | 20507 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20508 | { |
c906108c | 20509 | struct attribute *type_attr; |
c906108c | 20510 | |
e142c38c | 20511 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
20512 | if (!type_attr) |
20513 | { | |
20514 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 20515 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 20516 | } |
348e048f | 20517 | |
673bfd45 | 20518 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20519 | } |
20520 | ||
b4ba55a1 JB |
20521 | /* True iff CU's producer generates GNAT Ada auxiliary information |
20522 | that allows to find parallel types through that information instead | |
20523 | of having to do expensive parallel lookups by type name. */ | |
20524 | ||
20525 | static int | |
20526 | need_gnat_info (struct dwarf2_cu *cu) | |
20527 | { | |
20528 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
20529 | of GNAT produces this auxiliary information, without any indication | |
20530 | that it is produced. Part of enhancing the FSF version of GNAT | |
20531 | to produce that information will be to put in place an indicator | |
20532 | that we can use in order to determine whether the descriptive type | |
20533 | info is available or not. One suggestion that has been made is | |
20534 | to use a new attribute, attached to the CU die. For now, assume | |
20535 | that the descriptive type info is not available. */ | |
20536 | return 0; | |
20537 | } | |
20538 | ||
b4ba55a1 JB |
20539 | /* Return the auxiliary type of the die in question using its |
20540 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
20541 | attribute is not present. */ | |
20542 | ||
20543 | static struct type * | |
20544 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
20545 | { | |
b4ba55a1 | 20546 | struct attribute *type_attr; |
b4ba55a1 JB |
20547 | |
20548 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
20549 | if (!type_attr) | |
20550 | return NULL; | |
20551 | ||
673bfd45 | 20552 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
20553 | } |
20554 | ||
20555 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
20556 | descriptive type accordingly. */ | |
20557 | ||
20558 | static void | |
20559 | set_descriptive_type (struct type *type, struct die_info *die, | |
20560 | struct dwarf2_cu *cu) | |
20561 | { | |
20562 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
20563 | ||
20564 | if (descriptive_type) | |
20565 | { | |
20566 | ALLOCATE_GNAT_AUX_TYPE (type); | |
20567 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
20568 | } | |
20569 | } | |
20570 | ||
c906108c SS |
20571 | /* Return the containing type of the die in question using its |
20572 | DW_AT_containing_type attribute. */ | |
20573 | ||
20574 | static struct type * | |
e7c27a73 | 20575 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20576 | { |
c906108c | 20577 | struct attribute *type_attr; |
c906108c | 20578 | |
e142c38c | 20579 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
20580 | if (!type_attr) |
20581 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 20582 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 20583 | |
673bfd45 | 20584 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20585 | } |
20586 | ||
ac9ec31b DE |
20587 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
20588 | ||
20589 | static struct type * | |
20590 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
20591 | { | |
20592 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
20593 | char *message, *saved; | |
20594 | ||
20595 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 20596 | objfile_name (objfile), |
9c541725 PA |
20597 | to_underlying (cu->header.sect_off), |
20598 | to_underlying (die->sect_off)); | |
224c3ddb SM |
20599 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
20600 | message, strlen (message)); | |
ac9ec31b DE |
20601 | xfree (message); |
20602 | ||
19f392bc | 20603 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
20604 | } |
20605 | ||
673bfd45 | 20606 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
20607 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
20608 | DW_AT_containing_type. | |
673bfd45 DE |
20609 | If there is no type substitute an error marker. */ |
20610 | ||
c906108c | 20611 | static struct type * |
ff39bb5e | 20612 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 20613 | struct dwarf2_cu *cu) |
c906108c | 20614 | { |
bb5ed363 | 20615 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
20616 | struct type *this_type; |
20617 | ||
ac9ec31b DE |
20618 | gdb_assert (attr->name == DW_AT_type |
20619 | || attr->name == DW_AT_GNAT_descriptive_type | |
20620 | || attr->name == DW_AT_containing_type); | |
20621 | ||
673bfd45 DE |
20622 | /* First see if we have it cached. */ |
20623 | ||
36586728 TT |
20624 | if (attr->form == DW_FORM_GNU_ref_alt) |
20625 | { | |
20626 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 20627 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 20628 | |
9c541725 PA |
20629 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
20630 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 20631 | } |
7771576e | 20632 | else if (attr_form_is_ref (attr)) |
673bfd45 | 20633 | { |
9c541725 | 20634 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 20635 | |
9c541725 | 20636 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 20637 | } |
55f1336d | 20638 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 20639 | { |
ac9ec31b | 20640 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 20641 | |
ac9ec31b | 20642 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
20643 | } |
20644 | else | |
20645 | { | |
ac9ec31b DE |
20646 | complaint (&symfile_complaints, |
20647 | _("Dwarf Error: Bad type attribute %s in DIE" | |
20648 | " at 0x%x [in module %s]"), | |
9c541725 | 20649 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 20650 | objfile_name (objfile)); |
ac9ec31b | 20651 | return build_error_marker_type (cu, die); |
673bfd45 DE |
20652 | } |
20653 | ||
20654 | /* If not cached we need to read it in. */ | |
20655 | ||
20656 | if (this_type == NULL) | |
20657 | { | |
ac9ec31b | 20658 | struct die_info *type_die = NULL; |
673bfd45 DE |
20659 | struct dwarf2_cu *type_cu = cu; |
20660 | ||
7771576e | 20661 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20662 | type_die = follow_die_ref (die, attr, &type_cu); |
20663 | if (type_die == NULL) | |
20664 | return build_error_marker_type (cu, die); | |
20665 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
20666 | from an inter-CU reference and the type's CU got expanded before |
20667 | ours. */ | |
ac9ec31b | 20668 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
20669 | } |
20670 | ||
20671 | /* If we still don't have a type use an error marker. */ | |
20672 | ||
20673 | if (this_type == NULL) | |
ac9ec31b | 20674 | return build_error_marker_type (cu, die); |
673bfd45 | 20675 | |
f792889a | 20676 | return this_type; |
c906108c SS |
20677 | } |
20678 | ||
673bfd45 DE |
20679 | /* Return the type in DIE, CU. |
20680 | Returns NULL for invalid types. | |
20681 | ||
02142a6c | 20682 | This first does a lookup in die_type_hash, |
673bfd45 DE |
20683 | and only reads the die in if necessary. |
20684 | ||
20685 | NOTE: This can be called when reading in partial or full symbols. */ | |
20686 | ||
f792889a | 20687 | static struct type * |
e7c27a73 | 20688 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20689 | { |
f792889a DJ |
20690 | struct type *this_type; |
20691 | ||
20692 | this_type = get_die_type (die, cu); | |
20693 | if (this_type) | |
20694 | return this_type; | |
20695 | ||
673bfd45 DE |
20696 | return read_type_die_1 (die, cu); |
20697 | } | |
20698 | ||
20699 | /* Read the type in DIE, CU. | |
20700 | Returns NULL for invalid types. */ | |
20701 | ||
20702 | static struct type * | |
20703 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
20704 | { | |
20705 | struct type *this_type = NULL; | |
20706 | ||
c906108c SS |
20707 | switch (die->tag) |
20708 | { | |
20709 | case DW_TAG_class_type: | |
680b30c7 | 20710 | case DW_TAG_interface_type: |
c906108c SS |
20711 | case DW_TAG_structure_type: |
20712 | case DW_TAG_union_type: | |
f792889a | 20713 | this_type = read_structure_type (die, cu); |
c906108c SS |
20714 | break; |
20715 | case DW_TAG_enumeration_type: | |
f792889a | 20716 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
20717 | break; |
20718 | case DW_TAG_subprogram: | |
20719 | case DW_TAG_subroutine_type: | |
edb3359d | 20720 | case DW_TAG_inlined_subroutine: |
f792889a | 20721 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
20722 | break; |
20723 | case DW_TAG_array_type: | |
f792889a | 20724 | this_type = read_array_type (die, cu); |
c906108c | 20725 | break; |
72019c9c | 20726 | case DW_TAG_set_type: |
f792889a | 20727 | this_type = read_set_type (die, cu); |
72019c9c | 20728 | break; |
c906108c | 20729 | case DW_TAG_pointer_type: |
f792889a | 20730 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
20731 | break; |
20732 | case DW_TAG_ptr_to_member_type: | |
f792889a | 20733 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
20734 | break; |
20735 | case DW_TAG_reference_type: | |
4297a3f0 AV |
20736 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
20737 | break; | |
20738 | case DW_TAG_rvalue_reference_type: | |
20739 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
20740 | break; |
20741 | case DW_TAG_const_type: | |
f792889a | 20742 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
20743 | break; |
20744 | case DW_TAG_volatile_type: | |
f792889a | 20745 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 20746 | break; |
06d66ee9 TT |
20747 | case DW_TAG_restrict_type: |
20748 | this_type = read_tag_restrict_type (die, cu); | |
20749 | break; | |
c906108c | 20750 | case DW_TAG_string_type: |
f792889a | 20751 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
20752 | break; |
20753 | case DW_TAG_typedef: | |
f792889a | 20754 | this_type = read_typedef (die, cu); |
c906108c | 20755 | break; |
a02abb62 | 20756 | case DW_TAG_subrange_type: |
f792889a | 20757 | this_type = read_subrange_type (die, cu); |
a02abb62 | 20758 | break; |
c906108c | 20759 | case DW_TAG_base_type: |
f792889a | 20760 | this_type = read_base_type (die, cu); |
c906108c | 20761 | break; |
81a17f79 | 20762 | case DW_TAG_unspecified_type: |
f792889a | 20763 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 20764 | break; |
0114d602 DJ |
20765 | case DW_TAG_namespace: |
20766 | this_type = read_namespace_type (die, cu); | |
20767 | break; | |
f55ee35c JK |
20768 | case DW_TAG_module: |
20769 | this_type = read_module_type (die, cu); | |
20770 | break; | |
a2c2acaf MW |
20771 | case DW_TAG_atomic_type: |
20772 | this_type = read_tag_atomic_type (die, cu); | |
20773 | break; | |
c906108c | 20774 | default: |
3e43a32a MS |
20775 | complaint (&symfile_complaints, |
20776 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 20777 | dwarf_tag_name (die->tag)); |
c906108c SS |
20778 | break; |
20779 | } | |
63d06c5c | 20780 | |
f792889a | 20781 | return this_type; |
63d06c5c DC |
20782 | } |
20783 | ||
abc72ce4 DE |
20784 | /* See if we can figure out if the class lives in a namespace. We do |
20785 | this by looking for a member function; its demangled name will | |
20786 | contain namespace info, if there is any. | |
20787 | Return the computed name or NULL. | |
20788 | Space for the result is allocated on the objfile's obstack. | |
20789 | This is the full-die version of guess_partial_die_structure_name. | |
20790 | In this case we know DIE has no useful parent. */ | |
20791 | ||
20792 | static char * | |
20793 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
20794 | { | |
20795 | struct die_info *spec_die; | |
20796 | struct dwarf2_cu *spec_cu; | |
20797 | struct die_info *child; | |
20798 | ||
20799 | spec_cu = cu; | |
20800 | spec_die = die_specification (die, &spec_cu); | |
20801 | if (spec_die != NULL) | |
20802 | { | |
20803 | die = spec_die; | |
20804 | cu = spec_cu; | |
20805 | } | |
20806 | ||
20807 | for (child = die->child; | |
20808 | child != NULL; | |
20809 | child = child->sibling) | |
20810 | { | |
20811 | if (child->tag == DW_TAG_subprogram) | |
20812 | { | |
73b9be8b | 20813 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 20814 | |
7d45c7c3 | 20815 | if (linkage_name != NULL) |
abc72ce4 DE |
20816 | { |
20817 | char *actual_name | |
20818 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 20819 | linkage_name); |
abc72ce4 DE |
20820 | char *name = NULL; |
20821 | ||
20822 | if (actual_name != NULL) | |
20823 | { | |
15d034d0 | 20824 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
20825 | |
20826 | if (die_name != NULL | |
20827 | && strcmp (die_name, actual_name) != 0) | |
20828 | { | |
20829 | /* Strip off the class name from the full name. | |
20830 | We want the prefix. */ | |
20831 | int die_name_len = strlen (die_name); | |
20832 | int actual_name_len = strlen (actual_name); | |
20833 | ||
20834 | /* Test for '::' as a sanity check. */ | |
20835 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
20836 | && actual_name[actual_name_len |
20837 | - die_name_len - 1] == ':') | |
224c3ddb SM |
20838 | name = (char *) obstack_copy0 ( |
20839 | &cu->objfile->per_bfd->storage_obstack, | |
20840 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
20841 | } |
20842 | } | |
20843 | xfree (actual_name); | |
20844 | return name; | |
20845 | } | |
20846 | } | |
20847 | } | |
20848 | ||
20849 | return NULL; | |
20850 | } | |
20851 | ||
96408a79 SA |
20852 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
20853 | prefix part in such case. See | |
20854 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20855 | ||
a121b7c1 | 20856 | static const char * |
96408a79 SA |
20857 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
20858 | { | |
20859 | struct attribute *attr; | |
e6a959d6 | 20860 | const char *base; |
96408a79 SA |
20861 | |
20862 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
20863 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
20864 | return NULL; | |
20865 | ||
7d45c7c3 | 20866 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
20867 | return NULL; |
20868 | ||
73b9be8b | 20869 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
20870 | if (attr == NULL || DW_STRING (attr) == NULL) |
20871 | return NULL; | |
20872 | ||
20873 | /* dwarf2_name had to be already called. */ | |
20874 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
20875 | ||
20876 | /* Strip the base name, keep any leading namespaces/classes. */ | |
20877 | base = strrchr (DW_STRING (attr), ':'); | |
20878 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
20879 | return ""; | |
20880 | ||
224c3ddb SM |
20881 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
20882 | DW_STRING (attr), | |
20883 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
20884 | } |
20885 | ||
fdde2d81 | 20886 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 20887 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 20888 | |
0114d602 DJ |
20889 | For example, if we're within the method foo() in the following |
20890 | code: | |
20891 | ||
20892 | namespace N { | |
20893 | class C { | |
20894 | void foo () { | |
20895 | } | |
20896 | }; | |
20897 | } | |
20898 | ||
20899 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 20900 | |
0d5cff50 | 20901 | static const char * |
e142c38c | 20902 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 20903 | { |
0114d602 DJ |
20904 | struct die_info *parent, *spec_die; |
20905 | struct dwarf2_cu *spec_cu; | |
20906 | struct type *parent_type; | |
a121b7c1 | 20907 | const char *retval; |
63d06c5c | 20908 | |
9c37b5ae | 20909 | if (cu->language != language_cplus |
c44af4eb TT |
20910 | && cu->language != language_fortran && cu->language != language_d |
20911 | && cu->language != language_rust) | |
0114d602 DJ |
20912 | return ""; |
20913 | ||
96408a79 SA |
20914 | retval = anonymous_struct_prefix (die, cu); |
20915 | if (retval) | |
20916 | return retval; | |
20917 | ||
0114d602 DJ |
20918 | /* We have to be careful in the presence of DW_AT_specification. |
20919 | For example, with GCC 3.4, given the code | |
20920 | ||
20921 | namespace N { | |
20922 | void foo() { | |
20923 | // Definition of N::foo. | |
20924 | } | |
20925 | } | |
20926 | ||
20927 | then we'll have a tree of DIEs like this: | |
20928 | ||
20929 | 1: DW_TAG_compile_unit | |
20930 | 2: DW_TAG_namespace // N | |
20931 | 3: DW_TAG_subprogram // declaration of N::foo | |
20932 | 4: DW_TAG_subprogram // definition of N::foo | |
20933 | DW_AT_specification // refers to die #3 | |
20934 | ||
20935 | Thus, when processing die #4, we have to pretend that we're in | |
20936 | the context of its DW_AT_specification, namely the contex of die | |
20937 | #3. */ | |
20938 | spec_cu = cu; | |
20939 | spec_die = die_specification (die, &spec_cu); | |
20940 | if (spec_die == NULL) | |
20941 | parent = die->parent; | |
20942 | else | |
63d06c5c | 20943 | { |
0114d602 DJ |
20944 | parent = spec_die->parent; |
20945 | cu = spec_cu; | |
63d06c5c | 20946 | } |
0114d602 DJ |
20947 | |
20948 | if (parent == NULL) | |
20949 | return ""; | |
98bfdba5 PA |
20950 | else if (parent->building_fullname) |
20951 | { | |
20952 | const char *name; | |
20953 | const char *parent_name; | |
20954 | ||
20955 | /* It has been seen on RealView 2.2 built binaries, | |
20956 | DW_TAG_template_type_param types actually _defined_ as | |
20957 | children of the parent class: | |
20958 | ||
20959 | enum E {}; | |
20960 | template class <class Enum> Class{}; | |
20961 | Class<enum E> class_e; | |
20962 | ||
20963 | 1: DW_TAG_class_type (Class) | |
20964 | 2: DW_TAG_enumeration_type (E) | |
20965 | 3: DW_TAG_enumerator (enum1:0) | |
20966 | 3: DW_TAG_enumerator (enum2:1) | |
20967 | ... | |
20968 | 2: DW_TAG_template_type_param | |
20969 | DW_AT_type DW_FORM_ref_udata (E) | |
20970 | ||
20971 | Besides being broken debug info, it can put GDB into an | |
20972 | infinite loop. Consider: | |
20973 | ||
20974 | When we're building the full name for Class<E>, we'll start | |
20975 | at Class, and go look over its template type parameters, | |
20976 | finding E. We'll then try to build the full name of E, and | |
20977 | reach here. We're now trying to build the full name of E, | |
20978 | and look over the parent DIE for containing scope. In the | |
20979 | broken case, if we followed the parent DIE of E, we'd again | |
20980 | find Class, and once again go look at its template type | |
20981 | arguments, etc., etc. Simply don't consider such parent die | |
20982 | as source-level parent of this die (it can't be, the language | |
20983 | doesn't allow it), and break the loop here. */ | |
20984 | name = dwarf2_name (die, cu); | |
20985 | parent_name = dwarf2_name (parent, cu); | |
20986 | complaint (&symfile_complaints, | |
20987 | _("template param type '%s' defined within parent '%s'"), | |
20988 | name ? name : "<unknown>", | |
20989 | parent_name ? parent_name : "<unknown>"); | |
20990 | return ""; | |
20991 | } | |
63d06c5c | 20992 | else |
0114d602 DJ |
20993 | switch (parent->tag) |
20994 | { | |
63d06c5c | 20995 | case DW_TAG_namespace: |
0114d602 | 20996 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20997 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20998 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20999 | Work around this problem here. */ | |
21000 | if (cu->language == language_cplus | |
21001 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
21002 | return ""; | |
0114d602 DJ |
21003 | /* We give a name to even anonymous namespaces. */ |
21004 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 21005 | case DW_TAG_class_type: |
680b30c7 | 21006 | case DW_TAG_interface_type: |
63d06c5c | 21007 | case DW_TAG_structure_type: |
0114d602 | 21008 | case DW_TAG_union_type: |
f55ee35c | 21009 | case DW_TAG_module: |
0114d602 DJ |
21010 | parent_type = read_type_die (parent, cu); |
21011 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
21012 | return TYPE_TAG_NAME (parent_type); | |
21013 | else | |
21014 | /* An anonymous structure is only allowed non-static data | |
21015 | members; no typedefs, no member functions, et cetera. | |
21016 | So it does not need a prefix. */ | |
21017 | return ""; | |
abc72ce4 | 21018 | case DW_TAG_compile_unit: |
95554aad | 21019 | case DW_TAG_partial_unit: |
abc72ce4 DE |
21020 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
21021 | if (cu->language == language_cplus | |
8b70b953 | 21022 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
21023 | && die->child != NULL |
21024 | && (die->tag == DW_TAG_class_type | |
21025 | || die->tag == DW_TAG_structure_type | |
21026 | || die->tag == DW_TAG_union_type)) | |
21027 | { | |
21028 | char *name = guess_full_die_structure_name (die, cu); | |
21029 | if (name != NULL) | |
21030 | return name; | |
21031 | } | |
21032 | return ""; | |
3d567982 TT |
21033 | case DW_TAG_enumeration_type: |
21034 | parent_type = read_type_die (parent, cu); | |
21035 | if (TYPE_DECLARED_CLASS (parent_type)) | |
21036 | { | |
21037 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
21038 | return TYPE_TAG_NAME (parent_type); | |
21039 | return ""; | |
21040 | } | |
21041 | /* Fall through. */ | |
63d06c5c | 21042 | default: |
8176b9b8 | 21043 | return determine_prefix (parent, cu); |
63d06c5c | 21044 | } |
63d06c5c DC |
21045 | } |
21046 | ||
3e43a32a MS |
21047 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
21048 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
21049 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
21050 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
21051 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 21052 | |
f55ee35c | 21053 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
21054 | |
21055 | static char * | |
f55ee35c JK |
21056 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
21057 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 21058 | { |
f55ee35c | 21059 | const char *lead = ""; |
5c315b68 | 21060 | const char *sep; |
63d06c5c | 21061 | |
3e43a32a MS |
21062 | if (suffix == NULL || suffix[0] == '\0' |
21063 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 21064 | sep = ""; |
45280282 IB |
21065 | else if (cu->language == language_d) |
21066 | { | |
21067 | /* For D, the 'main' function could be defined in any module, but it | |
21068 | should never be prefixed. */ | |
21069 | if (strcmp (suffix, "D main") == 0) | |
21070 | { | |
21071 | prefix = ""; | |
21072 | sep = ""; | |
21073 | } | |
21074 | else | |
21075 | sep = "."; | |
21076 | } | |
f55ee35c JK |
21077 | else if (cu->language == language_fortran && physname) |
21078 | { | |
21079 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
21080 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
21081 | ||
21082 | lead = "__"; | |
21083 | sep = "_MOD_"; | |
21084 | } | |
987504bb JJ |
21085 | else |
21086 | sep = "::"; | |
63d06c5c | 21087 | |
6dd47d34 DE |
21088 | if (prefix == NULL) |
21089 | prefix = ""; | |
21090 | if (suffix == NULL) | |
21091 | suffix = ""; | |
21092 | ||
987504bb JJ |
21093 | if (obs == NULL) |
21094 | { | |
3e43a32a | 21095 | char *retval |
224c3ddb SM |
21096 | = ((char *) |
21097 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 21098 | |
f55ee35c JK |
21099 | strcpy (retval, lead); |
21100 | strcat (retval, prefix); | |
6dd47d34 DE |
21101 | strcat (retval, sep); |
21102 | strcat (retval, suffix); | |
63d06c5c DC |
21103 | return retval; |
21104 | } | |
987504bb JJ |
21105 | else |
21106 | { | |
21107 | /* We have an obstack. */ | |
f55ee35c | 21108 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 21109 | } |
63d06c5c DC |
21110 | } |
21111 | ||
c906108c SS |
21112 | /* Return sibling of die, NULL if no sibling. */ |
21113 | ||
f9aca02d | 21114 | static struct die_info * |
fba45db2 | 21115 | sibling_die (struct die_info *die) |
c906108c | 21116 | { |
639d11d3 | 21117 | return die->sibling; |
c906108c SS |
21118 | } |
21119 | ||
71c25dea TT |
21120 | /* Get name of a die, return NULL if not found. */ |
21121 | ||
15d034d0 TT |
21122 | static const char * |
21123 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
21124 | struct obstack *obstack) |
21125 | { | |
21126 | if (name && cu->language == language_cplus) | |
21127 | { | |
2f408ecb | 21128 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 21129 | |
2f408ecb | 21130 | if (!canon_name.empty ()) |
71c25dea | 21131 | { |
2f408ecb PA |
21132 | if (canon_name != name) |
21133 | name = (const char *) obstack_copy0 (obstack, | |
21134 | canon_name.c_str (), | |
21135 | canon_name.length ()); | |
71c25dea TT |
21136 | } |
21137 | } | |
21138 | ||
21139 | return name; | |
c906108c SS |
21140 | } |
21141 | ||
96553a0c DE |
21142 | /* Get name of a die, return NULL if not found. |
21143 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 21144 | |
15d034d0 | 21145 | static const char * |
e142c38c | 21146 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
21147 | { |
21148 | struct attribute *attr; | |
21149 | ||
e142c38c | 21150 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 21151 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 21152 | && die->tag != DW_TAG_namespace |
53832f31 TT |
21153 | && die->tag != DW_TAG_class_type |
21154 | && die->tag != DW_TAG_interface_type | |
21155 | && die->tag != DW_TAG_structure_type | |
21156 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
21157 | return NULL; |
21158 | ||
21159 | switch (die->tag) | |
21160 | { | |
21161 | case DW_TAG_compile_unit: | |
95554aad | 21162 | case DW_TAG_partial_unit: |
71c25dea TT |
21163 | /* Compilation units have a DW_AT_name that is a filename, not |
21164 | a source language identifier. */ | |
21165 | case DW_TAG_enumeration_type: | |
21166 | case DW_TAG_enumerator: | |
21167 | /* These tags always have simple identifiers already; no need | |
21168 | to canonicalize them. */ | |
21169 | return DW_STRING (attr); | |
907af001 | 21170 | |
96553a0c DE |
21171 | case DW_TAG_namespace: |
21172 | if (attr != NULL && DW_STRING (attr) != NULL) | |
21173 | return DW_STRING (attr); | |
21174 | return CP_ANONYMOUS_NAMESPACE_STR; | |
21175 | ||
907af001 UW |
21176 | case DW_TAG_class_type: |
21177 | case DW_TAG_interface_type: | |
21178 | case DW_TAG_structure_type: | |
21179 | case DW_TAG_union_type: | |
21180 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
21181 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
21182 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
21183 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 21184 | if (attr && DW_STRING (attr) |
61012eef GB |
21185 | && (startswith (DW_STRING (attr), "._") |
21186 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 21187 | return NULL; |
53832f31 TT |
21188 | |
21189 | /* GCC might emit a nameless typedef that has a linkage name. See | |
21190 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21191 | if (!attr || DW_STRING (attr) == NULL) | |
21192 | { | |
df5c6c50 | 21193 | char *demangled = NULL; |
53832f31 | 21194 | |
73b9be8b | 21195 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
21196 | if (attr == NULL || DW_STRING (attr) == NULL) |
21197 | return NULL; | |
21198 | ||
df5c6c50 JK |
21199 | /* Avoid demangling DW_STRING (attr) the second time on a second |
21200 | call for the same DIE. */ | |
21201 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 21202 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
21203 | |
21204 | if (demangled) | |
21205 | { | |
e6a959d6 | 21206 | const char *base; |
96408a79 | 21207 | |
53832f31 | 21208 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 21209 | DW_STRING (attr) |
224c3ddb SM |
21210 | = ((const char *) |
21211 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
21212 | demangled, strlen (demangled))); | |
53832f31 TT |
21213 | DW_STRING_IS_CANONICAL (attr) = 1; |
21214 | xfree (demangled); | |
96408a79 SA |
21215 | |
21216 | /* Strip any leading namespaces/classes, keep only the base name. | |
21217 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
21218 | base = strrchr (DW_STRING (attr), ':'); | |
21219 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
21220 | return &base[1]; | |
21221 | else | |
21222 | return DW_STRING (attr); | |
53832f31 TT |
21223 | } |
21224 | } | |
907af001 UW |
21225 | break; |
21226 | ||
71c25dea | 21227 | default: |
907af001 UW |
21228 | break; |
21229 | } | |
21230 | ||
21231 | if (!DW_STRING_IS_CANONICAL (attr)) | |
21232 | { | |
21233 | DW_STRING (attr) | |
21234 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 21235 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 21236 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 21237 | } |
907af001 | 21238 | return DW_STRING (attr); |
9219021c DC |
21239 | } |
21240 | ||
21241 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
21242 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
21243 | containing the return value on output. */ | |
9219021c DC |
21244 | |
21245 | static struct die_info * | |
f2f0e013 | 21246 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
21247 | { |
21248 | struct attribute *attr; | |
9219021c | 21249 | |
f2f0e013 | 21250 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
21251 | if (attr == NULL) |
21252 | return NULL; | |
21253 | ||
f2f0e013 | 21254 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
21255 | } |
21256 | ||
c906108c SS |
21257 | /* Convert a DIE tag into its string name. */ |
21258 | ||
f39c6ffd | 21259 | static const char * |
aa1ee363 | 21260 | dwarf_tag_name (unsigned tag) |
c906108c | 21261 | { |
f39c6ffd TT |
21262 | const char *name = get_DW_TAG_name (tag); |
21263 | ||
21264 | if (name == NULL) | |
21265 | return "DW_TAG_<unknown>"; | |
21266 | ||
21267 | return name; | |
c906108c SS |
21268 | } |
21269 | ||
21270 | /* Convert a DWARF attribute code into its string name. */ | |
21271 | ||
f39c6ffd | 21272 | static const char * |
aa1ee363 | 21273 | dwarf_attr_name (unsigned attr) |
c906108c | 21274 | { |
f39c6ffd TT |
21275 | const char *name; |
21276 | ||
c764a876 | 21277 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
21278 | if (attr == DW_AT_MIPS_fde) |
21279 | return "DW_AT_MIPS_fde"; | |
21280 | #else | |
21281 | if (attr == DW_AT_HP_block_index) | |
21282 | return "DW_AT_HP_block_index"; | |
c764a876 | 21283 | #endif |
f39c6ffd TT |
21284 | |
21285 | name = get_DW_AT_name (attr); | |
21286 | ||
21287 | if (name == NULL) | |
21288 | return "DW_AT_<unknown>"; | |
21289 | ||
21290 | return name; | |
c906108c SS |
21291 | } |
21292 | ||
21293 | /* Convert a DWARF value form code into its string name. */ | |
21294 | ||
f39c6ffd | 21295 | static const char * |
aa1ee363 | 21296 | dwarf_form_name (unsigned form) |
c906108c | 21297 | { |
f39c6ffd TT |
21298 | const char *name = get_DW_FORM_name (form); |
21299 | ||
21300 | if (name == NULL) | |
21301 | return "DW_FORM_<unknown>"; | |
21302 | ||
21303 | return name; | |
c906108c SS |
21304 | } |
21305 | ||
a121b7c1 | 21306 | static const char * |
fba45db2 | 21307 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
21308 | { |
21309 | if (mybool) | |
21310 | return "TRUE"; | |
21311 | else | |
21312 | return "FALSE"; | |
21313 | } | |
21314 | ||
21315 | /* Convert a DWARF type code into its string name. */ | |
21316 | ||
f39c6ffd | 21317 | static const char * |
aa1ee363 | 21318 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 21319 | { |
f39c6ffd | 21320 | const char *name = get_DW_ATE_name (enc); |
c906108c | 21321 | |
f39c6ffd TT |
21322 | if (name == NULL) |
21323 | return "DW_ATE_<unknown>"; | |
c906108c | 21324 | |
f39c6ffd | 21325 | return name; |
c906108c | 21326 | } |
c906108c | 21327 | |
f9aca02d | 21328 | static void |
d97bc12b | 21329 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21330 | { |
21331 | unsigned int i; | |
21332 | ||
d97bc12b DE |
21333 | print_spaces (indent, f); |
21334 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
21335 | dwarf_tag_name (die->tag), die->abbrev, |
21336 | to_underlying (die->sect_off)); | |
d97bc12b DE |
21337 | |
21338 | if (die->parent != NULL) | |
21339 | { | |
21340 | print_spaces (indent, f); | |
21341 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 21342 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
21343 | } |
21344 | ||
21345 | print_spaces (indent, f); | |
21346 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21347 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21348 | |
d97bc12b DE |
21349 | print_spaces (indent, f); |
21350 | fprintf_unfiltered (f, " attributes:\n"); | |
21351 | ||
c906108c SS |
21352 | for (i = 0; i < die->num_attrs; ++i) |
21353 | { | |
d97bc12b DE |
21354 | print_spaces (indent, f); |
21355 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21356 | dwarf_attr_name (die->attrs[i].name), |
21357 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21358 | |
c906108c SS |
21359 | switch (die->attrs[i].form) |
21360 | { | |
c906108c | 21361 | case DW_FORM_addr: |
3019eac3 | 21362 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21363 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21364 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21365 | break; |
21366 | case DW_FORM_block2: | |
21367 | case DW_FORM_block4: | |
21368 | case DW_FORM_block: | |
21369 | case DW_FORM_block1: | |
56eb65bd SP |
21370 | fprintf_unfiltered (f, "block: size %s", |
21371 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21372 | break; |
2dc7f7b3 | 21373 | case DW_FORM_exprloc: |
56eb65bd SP |
21374 | fprintf_unfiltered (f, "expression: size %s", |
21375 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21376 | break; |
0224619f JK |
21377 | case DW_FORM_data16: |
21378 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21379 | break; | |
4568ecf9 DE |
21380 | case DW_FORM_ref_addr: |
21381 | fprintf_unfiltered (f, "ref address: "); | |
21382 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21383 | break; | |
36586728 TT |
21384 | case DW_FORM_GNU_ref_alt: |
21385 | fprintf_unfiltered (f, "alt ref address: "); | |
21386 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21387 | break; | |
10b3939b DJ |
21388 | case DW_FORM_ref1: |
21389 | case DW_FORM_ref2: | |
21390 | case DW_FORM_ref4: | |
4568ecf9 DE |
21391 | case DW_FORM_ref8: |
21392 | case DW_FORM_ref_udata: | |
d97bc12b | 21393 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21394 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21395 | break; |
c906108c SS |
21396 | case DW_FORM_data1: |
21397 | case DW_FORM_data2: | |
21398 | case DW_FORM_data4: | |
ce5d95e1 | 21399 | case DW_FORM_data8: |
c906108c SS |
21400 | case DW_FORM_udata: |
21401 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21402 | fprintf_unfiltered (f, "constant: %s", |
21403 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21404 | break; |
2dc7f7b3 TT |
21405 | case DW_FORM_sec_offset: |
21406 | fprintf_unfiltered (f, "section offset: %s", | |
21407 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21408 | break; | |
55f1336d | 21409 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21410 | fprintf_unfiltered (f, "signature: %s", |
21411 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21412 | break; |
c906108c | 21413 | case DW_FORM_string: |
4bdf3d34 | 21414 | case DW_FORM_strp: |
43988095 | 21415 | case DW_FORM_line_strp: |
3019eac3 | 21416 | case DW_FORM_GNU_str_index: |
36586728 | 21417 | case DW_FORM_GNU_strp_alt: |
8285870a | 21418 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 21419 | DW_STRING (&die->attrs[i]) |
8285870a JK |
21420 | ? DW_STRING (&die->attrs[i]) : "", |
21421 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
21422 | break; |
21423 | case DW_FORM_flag: | |
21424 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 21425 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 21426 | else |
d97bc12b | 21427 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 21428 | break; |
2dc7f7b3 TT |
21429 | case DW_FORM_flag_present: |
21430 | fprintf_unfiltered (f, "flag: TRUE"); | |
21431 | break; | |
a8329558 | 21432 | case DW_FORM_indirect: |
0963b4bd MS |
21433 | /* The reader will have reduced the indirect form to |
21434 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
21435 | fprintf_unfiltered (f, |
21436 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 21437 | break; |
663c44ac JK |
21438 | case DW_FORM_implicit_const: |
21439 | fprintf_unfiltered (f, "constant: %s", | |
21440 | plongest (DW_SND (&die->attrs[i]))); | |
21441 | break; | |
c906108c | 21442 | default: |
d97bc12b | 21443 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 21444 | die->attrs[i].form); |
d97bc12b | 21445 | break; |
c906108c | 21446 | } |
d97bc12b | 21447 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
21448 | } |
21449 | } | |
21450 | ||
f9aca02d | 21451 | static void |
d97bc12b | 21452 | dump_die_for_error (struct die_info *die) |
c906108c | 21453 | { |
d97bc12b DE |
21454 | dump_die_shallow (gdb_stderr, 0, die); |
21455 | } | |
21456 | ||
21457 | static void | |
21458 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
21459 | { | |
21460 | int indent = level * 4; | |
21461 | ||
21462 | gdb_assert (die != NULL); | |
21463 | ||
21464 | if (level >= max_level) | |
21465 | return; | |
21466 | ||
21467 | dump_die_shallow (f, indent, die); | |
21468 | ||
21469 | if (die->child != NULL) | |
c906108c | 21470 | { |
d97bc12b DE |
21471 | print_spaces (indent, f); |
21472 | fprintf_unfiltered (f, " Children:"); | |
21473 | if (level + 1 < max_level) | |
21474 | { | |
21475 | fprintf_unfiltered (f, "\n"); | |
21476 | dump_die_1 (f, level + 1, max_level, die->child); | |
21477 | } | |
21478 | else | |
21479 | { | |
3e43a32a MS |
21480 | fprintf_unfiltered (f, |
21481 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
21482 | } |
21483 | } | |
21484 | ||
21485 | if (die->sibling != NULL && level > 0) | |
21486 | { | |
21487 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
21488 | } |
21489 | } | |
21490 | ||
d97bc12b DE |
21491 | /* This is called from the pdie macro in gdbinit.in. |
21492 | It's not static so gcc will keep a copy callable from gdb. */ | |
21493 | ||
21494 | void | |
21495 | dump_die (struct die_info *die, int max_level) | |
21496 | { | |
21497 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
21498 | } | |
21499 | ||
f9aca02d | 21500 | static void |
51545339 | 21501 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21502 | { |
51545339 | 21503 | void **slot; |
c906108c | 21504 | |
9c541725 PA |
21505 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
21506 | to_underlying (die->sect_off), | |
b64f50a1 | 21507 | INSERT); |
51545339 DJ |
21508 | |
21509 | *slot = die; | |
c906108c SS |
21510 | } |
21511 | ||
b64f50a1 JK |
21512 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
21513 | required kind. */ | |
21514 | ||
21515 | static sect_offset | |
ff39bb5e | 21516 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 21517 | { |
7771576e | 21518 | if (attr_form_is_ref (attr)) |
9c541725 | 21519 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
21520 | |
21521 | complaint (&symfile_complaints, | |
21522 | _("unsupported die ref attribute form: '%s'"), | |
21523 | dwarf_form_name (attr->form)); | |
9c541725 | 21524 | return {}; |
c906108c SS |
21525 | } |
21526 | ||
43bbcdc2 PH |
21527 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
21528 | * the value held by the attribute is not constant. */ | |
a02abb62 | 21529 | |
43bbcdc2 | 21530 | static LONGEST |
ff39bb5e | 21531 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 21532 | { |
663c44ac | 21533 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
21534 | return DW_SND (attr); |
21535 | else if (attr->form == DW_FORM_udata | |
21536 | || attr->form == DW_FORM_data1 | |
21537 | || attr->form == DW_FORM_data2 | |
21538 | || attr->form == DW_FORM_data4 | |
21539 | || attr->form == DW_FORM_data8) | |
21540 | return DW_UNSND (attr); | |
21541 | else | |
21542 | { | |
0224619f | 21543 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
21544 | complaint (&symfile_complaints, |
21545 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
21546 | dwarf_form_name (attr->form)); |
21547 | return default_value; | |
21548 | } | |
21549 | } | |
21550 | ||
348e048f DE |
21551 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
21552 | On entry *REF_CU is the CU of SRC_DIE. | |
21553 | On exit *REF_CU is the CU of the result. */ | |
21554 | ||
21555 | static struct die_info * | |
ff39bb5e | 21556 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
21557 | struct dwarf2_cu **ref_cu) |
21558 | { | |
21559 | struct die_info *die; | |
21560 | ||
7771576e | 21561 | if (attr_form_is_ref (attr)) |
348e048f | 21562 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 21563 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
21564 | die = follow_die_sig (src_die, attr, ref_cu); |
21565 | else | |
21566 | { | |
21567 | dump_die_for_error (src_die); | |
21568 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 21569 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
21570 | } |
21571 | ||
21572 | return die; | |
03dd20cc DJ |
21573 | } |
21574 | ||
5c631832 | 21575 | /* Follow reference OFFSET. |
673bfd45 DE |
21576 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
21577 | On exit *REF_CU is the CU of the result. | |
21578 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 21579 | |
f9aca02d | 21580 | static struct die_info * |
9c541725 | 21581 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 21582 | struct dwarf2_cu **ref_cu) |
c906108c | 21583 | { |
10b3939b | 21584 | struct die_info temp_die; |
f2f0e013 | 21585 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 21586 | |
348e048f DE |
21587 | gdb_assert (cu->per_cu != NULL); |
21588 | ||
98bfdba5 PA |
21589 | target_cu = cu; |
21590 | ||
3019eac3 | 21591 | if (cu->per_cu->is_debug_types) |
348e048f DE |
21592 | { |
21593 | /* .debug_types CUs cannot reference anything outside their CU. | |
21594 | If they need to, they have to reference a signatured type via | |
55f1336d | 21595 | DW_FORM_ref_sig8. */ |
9c541725 | 21596 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 21597 | return NULL; |
348e048f | 21598 | } |
36586728 | 21599 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 21600 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
21601 | { |
21602 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 21603 | |
9c541725 | 21604 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 21605 | cu->objfile); |
03dd20cc DJ |
21606 | |
21607 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
21608 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
21609 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 21610 | |
10b3939b DJ |
21611 | target_cu = per_cu->cu; |
21612 | } | |
98bfdba5 PA |
21613 | else if (cu->dies == NULL) |
21614 | { | |
21615 | /* We're loading full DIEs during partial symbol reading. */ | |
21616 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 21617 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 21618 | } |
c906108c | 21619 | |
f2f0e013 | 21620 | *ref_cu = target_cu; |
9c541725 | 21621 | temp_die.sect_off = sect_off; |
9a3c8263 | 21622 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
21623 | &temp_die, |
21624 | to_underlying (sect_off)); | |
5c631832 | 21625 | } |
10b3939b | 21626 | |
5c631832 JK |
21627 | /* Follow reference attribute ATTR of SRC_DIE. |
21628 | On entry *REF_CU is the CU of SRC_DIE. | |
21629 | On exit *REF_CU is the CU of the result. */ | |
21630 | ||
21631 | static struct die_info * | |
ff39bb5e | 21632 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
21633 | struct dwarf2_cu **ref_cu) |
21634 | { | |
9c541725 | 21635 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
21636 | struct dwarf2_cu *cu = *ref_cu; |
21637 | struct die_info *die; | |
21638 | ||
9c541725 | 21639 | die = follow_die_offset (sect_off, |
36586728 TT |
21640 | (attr->form == DW_FORM_GNU_ref_alt |
21641 | || cu->per_cu->is_dwz), | |
21642 | ref_cu); | |
5c631832 JK |
21643 | if (!die) |
21644 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
21645 | "at 0x%x [in module %s]"), | |
9c541725 | 21646 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 21647 | objfile_name (cu->objfile)); |
348e048f | 21648 | |
5c631832 JK |
21649 | return die; |
21650 | } | |
21651 | ||
9c541725 | 21652 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
21653 | Returned value is intended for DW_OP_call*. Returned |
21654 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
21655 | |
21656 | struct dwarf2_locexpr_baton | |
9c541725 | 21657 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
21658 | struct dwarf2_per_cu_data *per_cu, |
21659 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21660 | void *baton) | |
5c631832 | 21661 | { |
918dd910 | 21662 | struct dwarf2_cu *cu; |
5c631832 JK |
21663 | struct die_info *die; |
21664 | struct attribute *attr; | |
21665 | struct dwarf2_locexpr_baton retval; | |
21666 | ||
8cf6f0b1 TT |
21667 | dw2_setup (per_cu->objfile); |
21668 | ||
918dd910 JK |
21669 | if (per_cu->cu == NULL) |
21670 | load_cu (per_cu); | |
21671 | cu = per_cu->cu; | |
cc12ce38 DE |
21672 | if (cu == NULL) |
21673 | { | |
21674 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21675 | Instead just throw an error, not much else we can do. */ | |
21676 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21677 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21678 | } |
918dd910 | 21679 | |
9c541725 | 21680 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
21681 | if (!die) |
21682 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21683 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21684 | |
21685 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21686 | if (!attr) | |
21687 | { | |
e103e986 JK |
21688 | /* DWARF: "If there is no such attribute, then there is no effect.". |
21689 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 21690 | |
e103e986 | 21691 | retval.data = NULL; |
5c631832 JK |
21692 | retval.size = 0; |
21693 | } | |
8cf6f0b1 TT |
21694 | else if (attr_form_is_section_offset (attr)) |
21695 | { | |
21696 | struct dwarf2_loclist_baton loclist_baton; | |
21697 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
21698 | size_t size; | |
21699 | ||
21700 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
21701 | ||
21702 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
21703 | &size, pc); | |
21704 | retval.size = size; | |
21705 | } | |
5c631832 JK |
21706 | else |
21707 | { | |
21708 | if (!attr_form_is_block (attr)) | |
21709 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
21710 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 21711 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21712 | |
21713 | retval.data = DW_BLOCK (attr)->data; | |
21714 | retval.size = DW_BLOCK (attr)->size; | |
21715 | } | |
21716 | retval.per_cu = cu->per_cu; | |
918dd910 | 21717 | |
918dd910 JK |
21718 | age_cached_comp_units (); |
21719 | ||
5c631832 | 21720 | return retval; |
348e048f DE |
21721 | } |
21722 | ||
8b9737bf TT |
21723 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
21724 | offset. */ | |
21725 | ||
21726 | struct dwarf2_locexpr_baton | |
21727 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
21728 | struct dwarf2_per_cu_data *per_cu, | |
21729 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21730 | void *baton) | |
21731 | { | |
9c541725 | 21732 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 21733 | |
9c541725 | 21734 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
21735 | } |
21736 | ||
b6807d98 TT |
21737 | /* Write a constant of a given type as target-ordered bytes into |
21738 | OBSTACK. */ | |
21739 | ||
21740 | static const gdb_byte * | |
21741 | write_constant_as_bytes (struct obstack *obstack, | |
21742 | enum bfd_endian byte_order, | |
21743 | struct type *type, | |
21744 | ULONGEST value, | |
21745 | LONGEST *len) | |
21746 | { | |
21747 | gdb_byte *result; | |
21748 | ||
21749 | *len = TYPE_LENGTH (type); | |
224c3ddb | 21750 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21751 | store_unsigned_integer (result, *len, byte_order, value); |
21752 | ||
21753 | return result; | |
21754 | } | |
21755 | ||
21756 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
21757 | pointer to the constant bytes and set LEN to the length of the | |
21758 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
21759 | does not have a DW_AT_const_value, return NULL. */ | |
21760 | ||
21761 | const gdb_byte * | |
9c541725 | 21762 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
21763 | struct dwarf2_per_cu_data *per_cu, |
21764 | struct obstack *obstack, | |
21765 | LONGEST *len) | |
21766 | { | |
21767 | struct dwarf2_cu *cu; | |
21768 | struct die_info *die; | |
21769 | struct attribute *attr; | |
21770 | const gdb_byte *result = NULL; | |
21771 | struct type *type; | |
21772 | LONGEST value; | |
21773 | enum bfd_endian byte_order; | |
21774 | ||
21775 | dw2_setup (per_cu->objfile); | |
21776 | ||
21777 | if (per_cu->cu == NULL) | |
21778 | load_cu (per_cu); | |
21779 | cu = per_cu->cu; | |
cc12ce38 DE |
21780 | if (cu == NULL) |
21781 | { | |
21782 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21783 | Instead just throw an error, not much else we can do. */ | |
21784 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21785 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21786 | } |
b6807d98 | 21787 | |
9c541725 | 21788 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
21789 | if (!die) |
21790 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21791 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
21792 | |
21793 | ||
21794 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21795 | if (attr == NULL) | |
21796 | return NULL; | |
21797 | ||
21798 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
21799 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21800 | ||
21801 | switch (attr->form) | |
21802 | { | |
21803 | case DW_FORM_addr: | |
21804 | case DW_FORM_GNU_addr_index: | |
21805 | { | |
21806 | gdb_byte *tem; | |
21807 | ||
21808 | *len = cu->header.addr_size; | |
224c3ddb | 21809 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21810 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
21811 | result = tem; | |
21812 | } | |
21813 | break; | |
21814 | case DW_FORM_string: | |
21815 | case DW_FORM_strp: | |
21816 | case DW_FORM_GNU_str_index: | |
21817 | case DW_FORM_GNU_strp_alt: | |
21818 | /* DW_STRING is already allocated on the objfile obstack, point | |
21819 | directly to it. */ | |
21820 | result = (const gdb_byte *) DW_STRING (attr); | |
21821 | *len = strlen (DW_STRING (attr)); | |
21822 | break; | |
21823 | case DW_FORM_block1: | |
21824 | case DW_FORM_block2: | |
21825 | case DW_FORM_block4: | |
21826 | case DW_FORM_block: | |
21827 | case DW_FORM_exprloc: | |
0224619f | 21828 | case DW_FORM_data16: |
b6807d98 TT |
21829 | result = DW_BLOCK (attr)->data; |
21830 | *len = DW_BLOCK (attr)->size; | |
21831 | break; | |
21832 | ||
21833 | /* The DW_AT_const_value attributes are supposed to carry the | |
21834 | symbol's value "represented as it would be on the target | |
21835 | architecture." By the time we get here, it's already been | |
21836 | converted to host endianness, so we just need to sign- or | |
21837 | zero-extend it as appropriate. */ | |
21838 | case DW_FORM_data1: | |
21839 | type = die_type (die, cu); | |
21840 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
21841 | if (result == NULL) | |
21842 | result = write_constant_as_bytes (obstack, byte_order, | |
21843 | type, value, len); | |
21844 | break; | |
21845 | case DW_FORM_data2: | |
21846 | type = die_type (die, cu); | |
21847 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
21848 | if (result == NULL) | |
21849 | result = write_constant_as_bytes (obstack, byte_order, | |
21850 | type, value, len); | |
21851 | break; | |
21852 | case DW_FORM_data4: | |
21853 | type = die_type (die, cu); | |
21854 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
21855 | if (result == NULL) | |
21856 | result = write_constant_as_bytes (obstack, byte_order, | |
21857 | type, value, len); | |
21858 | break; | |
21859 | case DW_FORM_data8: | |
21860 | type = die_type (die, cu); | |
21861 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
21862 | if (result == NULL) | |
21863 | result = write_constant_as_bytes (obstack, byte_order, | |
21864 | type, value, len); | |
21865 | break; | |
21866 | ||
21867 | case DW_FORM_sdata: | |
663c44ac | 21868 | case DW_FORM_implicit_const: |
b6807d98 TT |
21869 | type = die_type (die, cu); |
21870 | result = write_constant_as_bytes (obstack, byte_order, | |
21871 | type, DW_SND (attr), len); | |
21872 | break; | |
21873 | ||
21874 | case DW_FORM_udata: | |
21875 | type = die_type (die, cu); | |
21876 | result = write_constant_as_bytes (obstack, byte_order, | |
21877 | type, DW_UNSND (attr), len); | |
21878 | break; | |
21879 | ||
21880 | default: | |
21881 | complaint (&symfile_complaints, | |
21882 | _("unsupported const value attribute form: '%s'"), | |
21883 | dwarf_form_name (attr->form)); | |
21884 | break; | |
21885 | } | |
21886 | ||
21887 | return result; | |
21888 | } | |
21889 | ||
7942e96e AA |
21890 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
21891 | valid type for this die is found. */ | |
21892 | ||
21893 | struct type * | |
9c541725 | 21894 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
21895 | struct dwarf2_per_cu_data *per_cu) |
21896 | { | |
21897 | struct dwarf2_cu *cu; | |
21898 | struct die_info *die; | |
21899 | ||
21900 | dw2_setup (per_cu->objfile); | |
21901 | ||
21902 | if (per_cu->cu == NULL) | |
21903 | load_cu (per_cu); | |
21904 | cu = per_cu->cu; | |
21905 | if (!cu) | |
21906 | return NULL; | |
21907 | ||
9c541725 | 21908 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
21909 | if (!die) |
21910 | return NULL; | |
21911 | ||
21912 | return die_type (die, cu); | |
21913 | } | |
21914 | ||
8a9b8146 TT |
21915 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
21916 | PER_CU. */ | |
21917 | ||
21918 | struct type * | |
b64f50a1 | 21919 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
21920 | struct dwarf2_per_cu_data *per_cu) |
21921 | { | |
8a9b8146 | 21922 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21923 | |
9c541725 | 21924 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21925 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21926 | } |
21927 | ||
ac9ec31b | 21928 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21929 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21930 | On exit *REF_CU is the CU of the result. |
21931 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21932 | |
21933 | static struct die_info * | |
ac9ec31b DE |
21934 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21935 | struct dwarf2_cu **ref_cu) | |
348e048f | 21936 | { |
348e048f | 21937 | struct die_info temp_die; |
348e048f DE |
21938 | struct dwarf2_cu *sig_cu; |
21939 | struct die_info *die; | |
21940 | ||
ac9ec31b DE |
21941 | /* While it might be nice to assert sig_type->type == NULL here, |
21942 | we can get here for DW_AT_imported_declaration where we need | |
21943 | the DIE not the type. */ | |
348e048f DE |
21944 | |
21945 | /* If necessary, add it to the queue and load its DIEs. */ | |
21946 | ||
95554aad | 21947 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21948 | read_signatured_type (sig_type); |
348e048f | 21949 | |
348e048f | 21950 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21951 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21952 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21953 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21954 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21955 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21956 | if (die) |
21957 | { | |
796a7ff8 DE |
21958 | /* For .gdb_index version 7 keep track of included TUs. |
21959 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21960 | if (dwarf2_per_objfile->index_table != NULL | |
21961 | && dwarf2_per_objfile->index_table->version <= 7) | |
21962 | { | |
21963 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21964 | (*ref_cu)->per_cu->imported_symtabs, | |
21965 | sig_cu->per_cu); | |
21966 | } | |
21967 | ||
348e048f DE |
21968 | *ref_cu = sig_cu; |
21969 | return die; | |
21970 | } | |
21971 | ||
ac9ec31b DE |
21972 | return NULL; |
21973 | } | |
21974 | ||
21975 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21976 | On entry *REF_CU is the CU of SRC_DIE. | |
21977 | On exit *REF_CU is the CU of the result. | |
21978 | The result is the DIE of the type. | |
21979 | If the referenced type cannot be found an error is thrown. */ | |
21980 | ||
21981 | static struct die_info * | |
ff39bb5e | 21982 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21983 | struct dwarf2_cu **ref_cu) |
21984 | { | |
21985 | ULONGEST signature = DW_SIGNATURE (attr); | |
21986 | struct signatured_type *sig_type; | |
21987 | struct die_info *die; | |
21988 | ||
21989 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21990 | ||
a2ce51a0 | 21991 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21992 | /* sig_type will be NULL if the signatured type is missing from |
21993 | the debug info. */ | |
21994 | if (sig_type == NULL) | |
21995 | { | |
21996 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21997 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21998 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21999 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
22000 | } |
22001 | ||
22002 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
22003 | if (die == NULL) | |
22004 | { | |
22005 | dump_die_for_error (src_die); | |
22006 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
22007 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 22008 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 22009 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
22010 | } |
22011 | ||
22012 | return die; | |
22013 | } | |
22014 | ||
22015 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
22016 | reading in and processing the type unit if necessary. */ | |
22017 | ||
22018 | static struct type * | |
22019 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
22020 | struct dwarf2_cu *cu) | |
22021 | { | |
22022 | struct signatured_type *sig_type; | |
22023 | struct dwarf2_cu *type_cu; | |
22024 | struct die_info *type_die; | |
22025 | struct type *type; | |
22026 | ||
a2ce51a0 | 22027 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
22028 | /* sig_type will be NULL if the signatured type is missing from |
22029 | the debug info. */ | |
22030 | if (sig_type == NULL) | |
22031 | { | |
22032 | complaint (&symfile_complaints, | |
22033 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
22034 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 22035 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22036 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22037 | return build_error_marker_type (cu, die); |
22038 | } | |
22039 | ||
22040 | /* If we already know the type we're done. */ | |
22041 | if (sig_type->type != NULL) | |
22042 | return sig_type->type; | |
22043 | ||
22044 | type_cu = cu; | |
22045 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
22046 | if (type_die != NULL) | |
22047 | { | |
22048 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
22049 | is created. This is important, for example, because for c++ classes | |
22050 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
22051 | type = read_type_die (type_die, type_cu); | |
22052 | if (type == NULL) | |
22053 | { | |
22054 | complaint (&symfile_complaints, | |
22055 | _("Dwarf Error: Cannot build signatured type %s" | |
22056 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 22057 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22058 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22059 | type = build_error_marker_type (cu, die); |
22060 | } | |
22061 | } | |
22062 | else | |
22063 | { | |
22064 | complaint (&symfile_complaints, | |
22065 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
22066 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 22067 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22068 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22069 | type = build_error_marker_type (cu, die); |
22070 | } | |
22071 | sig_type->type = type; | |
22072 | ||
22073 | return type; | |
22074 | } | |
22075 | ||
22076 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
22077 | reading in and processing the type unit if necessary. */ | |
22078 | ||
22079 | static struct type * | |
ff39bb5e | 22080 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 22081 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
22082 | { |
22083 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 22084 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
22085 | { |
22086 | struct dwarf2_cu *type_cu = cu; | |
22087 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
22088 | ||
22089 | return read_type_die (type_die, type_cu); | |
22090 | } | |
22091 | else if (attr->form == DW_FORM_ref_sig8) | |
22092 | { | |
22093 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
22094 | } | |
22095 | else | |
22096 | { | |
22097 | complaint (&symfile_complaints, | |
22098 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
22099 | " at 0x%x [in module %s]"), | |
9c541725 | 22100 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 22101 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22102 | return build_error_marker_type (cu, die); |
22103 | } | |
348e048f DE |
22104 | } |
22105 | ||
e5fe5e75 | 22106 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
22107 | |
22108 | static void | |
e5fe5e75 | 22109 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 22110 | { |
52dc124a | 22111 | struct signatured_type *sig_type; |
348e048f | 22112 | |
f4dc4d17 DE |
22113 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
22114 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
22115 | ||
6721b2ec DE |
22116 | /* We have the per_cu, but we need the signatured_type. |
22117 | Fortunately this is an easy translation. */ | |
22118 | gdb_assert (per_cu->is_debug_types); | |
22119 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 22120 | |
6721b2ec | 22121 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22122 | |
52dc124a | 22123 | read_signatured_type (sig_type); |
348e048f | 22124 | |
6721b2ec | 22125 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
22126 | } |
22127 | ||
dee91e82 DE |
22128 | /* die_reader_func for read_signatured_type. |
22129 | This is identical to load_full_comp_unit_reader, | |
22130 | but is kept separate for now. */ | |
348e048f DE |
22131 | |
22132 | static void | |
dee91e82 | 22133 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 22134 | const gdb_byte *info_ptr, |
dee91e82 DE |
22135 | struct die_info *comp_unit_die, |
22136 | int has_children, | |
22137 | void *data) | |
348e048f | 22138 | { |
dee91e82 | 22139 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 22140 | |
dee91e82 DE |
22141 | gdb_assert (cu->die_hash == NULL); |
22142 | cu->die_hash = | |
22143 | htab_create_alloc_ex (cu->header.length / 12, | |
22144 | die_hash, | |
22145 | die_eq, | |
22146 | NULL, | |
22147 | &cu->comp_unit_obstack, | |
22148 | hashtab_obstack_allocate, | |
22149 | dummy_obstack_deallocate); | |
348e048f | 22150 | |
dee91e82 DE |
22151 | if (has_children) |
22152 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
22153 | &info_ptr, comp_unit_die); | |
22154 | cu->dies = comp_unit_die; | |
22155 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
22156 | |
22157 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 22158 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 22159 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
22160 | or we won't be able to build types correctly. |
22161 | Similarly, if we do not read the producer, we can not apply | |
22162 | producer-specific interpretation. */ | |
95554aad | 22163 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 22164 | } |
348e048f | 22165 | |
3019eac3 DE |
22166 | /* Read in a signatured type and build its CU and DIEs. |
22167 | If the type is a stub for the real type in a DWO file, | |
22168 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
22169 | |
22170 | static void | |
22171 | read_signatured_type (struct signatured_type *sig_type) | |
22172 | { | |
22173 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 22174 | |
3019eac3 | 22175 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 22176 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22177 | |
f4dc4d17 DE |
22178 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
22179 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 22180 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
22181 | } |
22182 | ||
c906108c SS |
22183 | /* Decode simple location descriptions. |
22184 | Given a pointer to a dwarf block that defines a location, compute | |
22185 | the location and return the value. | |
22186 | ||
4cecd739 DJ |
22187 | NOTE drow/2003-11-18: This function is called in two situations |
22188 | now: for the address of static or global variables (partial symbols | |
22189 | only) and for offsets into structures which are expected to be | |
22190 | (more or less) constant. The partial symbol case should go away, | |
22191 | and only the constant case should remain. That will let this | |
22192 | function complain more accurately. A few special modes are allowed | |
22193 | without complaint for global variables (for instance, global | |
22194 | register values and thread-local values). | |
c906108c SS |
22195 | |
22196 | A location description containing no operations indicates that the | |
4cecd739 | 22197 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
22198 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
22199 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
22200 | complaint. |
22201 | ||
22202 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
22203 | |
22204 | static CORE_ADDR | |
e7c27a73 | 22205 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 22206 | { |
e7c27a73 | 22207 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
22208 | size_t i; |
22209 | size_t size = blk->size; | |
d521ce57 | 22210 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
22211 | CORE_ADDR stack[64]; |
22212 | int stacki; | |
22213 | unsigned int bytes_read, unsnd; | |
22214 | gdb_byte op; | |
c906108c | 22215 | |
21ae7a4d JK |
22216 | i = 0; |
22217 | stacki = 0; | |
22218 | stack[stacki] = 0; | |
22219 | stack[++stacki] = 0; | |
22220 | ||
22221 | while (i < size) | |
22222 | { | |
22223 | op = data[i++]; | |
22224 | switch (op) | |
22225 | { | |
22226 | case DW_OP_lit0: | |
22227 | case DW_OP_lit1: | |
22228 | case DW_OP_lit2: | |
22229 | case DW_OP_lit3: | |
22230 | case DW_OP_lit4: | |
22231 | case DW_OP_lit5: | |
22232 | case DW_OP_lit6: | |
22233 | case DW_OP_lit7: | |
22234 | case DW_OP_lit8: | |
22235 | case DW_OP_lit9: | |
22236 | case DW_OP_lit10: | |
22237 | case DW_OP_lit11: | |
22238 | case DW_OP_lit12: | |
22239 | case DW_OP_lit13: | |
22240 | case DW_OP_lit14: | |
22241 | case DW_OP_lit15: | |
22242 | case DW_OP_lit16: | |
22243 | case DW_OP_lit17: | |
22244 | case DW_OP_lit18: | |
22245 | case DW_OP_lit19: | |
22246 | case DW_OP_lit20: | |
22247 | case DW_OP_lit21: | |
22248 | case DW_OP_lit22: | |
22249 | case DW_OP_lit23: | |
22250 | case DW_OP_lit24: | |
22251 | case DW_OP_lit25: | |
22252 | case DW_OP_lit26: | |
22253 | case DW_OP_lit27: | |
22254 | case DW_OP_lit28: | |
22255 | case DW_OP_lit29: | |
22256 | case DW_OP_lit30: | |
22257 | case DW_OP_lit31: | |
22258 | stack[++stacki] = op - DW_OP_lit0; | |
22259 | break; | |
f1bea926 | 22260 | |
21ae7a4d JK |
22261 | case DW_OP_reg0: |
22262 | case DW_OP_reg1: | |
22263 | case DW_OP_reg2: | |
22264 | case DW_OP_reg3: | |
22265 | case DW_OP_reg4: | |
22266 | case DW_OP_reg5: | |
22267 | case DW_OP_reg6: | |
22268 | case DW_OP_reg7: | |
22269 | case DW_OP_reg8: | |
22270 | case DW_OP_reg9: | |
22271 | case DW_OP_reg10: | |
22272 | case DW_OP_reg11: | |
22273 | case DW_OP_reg12: | |
22274 | case DW_OP_reg13: | |
22275 | case DW_OP_reg14: | |
22276 | case DW_OP_reg15: | |
22277 | case DW_OP_reg16: | |
22278 | case DW_OP_reg17: | |
22279 | case DW_OP_reg18: | |
22280 | case DW_OP_reg19: | |
22281 | case DW_OP_reg20: | |
22282 | case DW_OP_reg21: | |
22283 | case DW_OP_reg22: | |
22284 | case DW_OP_reg23: | |
22285 | case DW_OP_reg24: | |
22286 | case DW_OP_reg25: | |
22287 | case DW_OP_reg26: | |
22288 | case DW_OP_reg27: | |
22289 | case DW_OP_reg28: | |
22290 | case DW_OP_reg29: | |
22291 | case DW_OP_reg30: | |
22292 | case DW_OP_reg31: | |
22293 | stack[++stacki] = op - DW_OP_reg0; | |
22294 | if (i < size) | |
22295 | dwarf2_complex_location_expr_complaint (); | |
22296 | break; | |
c906108c | 22297 | |
21ae7a4d JK |
22298 | case DW_OP_regx: |
22299 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
22300 | i += bytes_read; | |
22301 | stack[++stacki] = unsnd; | |
22302 | if (i < size) | |
22303 | dwarf2_complex_location_expr_complaint (); | |
22304 | break; | |
c906108c | 22305 | |
21ae7a4d JK |
22306 | case DW_OP_addr: |
22307 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
22308 | cu, &bytes_read); | |
22309 | i += bytes_read; | |
22310 | break; | |
d53d4ac5 | 22311 | |
21ae7a4d JK |
22312 | case DW_OP_const1u: |
22313 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
22314 | i += 1; | |
22315 | break; | |
22316 | ||
22317 | case DW_OP_const1s: | |
22318 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
22319 | i += 1; | |
22320 | break; | |
22321 | ||
22322 | case DW_OP_const2u: | |
22323 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
22324 | i += 2; | |
22325 | break; | |
22326 | ||
22327 | case DW_OP_const2s: | |
22328 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22329 | i += 2; | |
22330 | break; | |
d53d4ac5 | 22331 | |
21ae7a4d JK |
22332 | case DW_OP_const4u: |
22333 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22334 | i += 4; | |
22335 | break; | |
22336 | ||
22337 | case DW_OP_const4s: | |
22338 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22339 | i += 4; | |
22340 | break; | |
22341 | ||
585861ea JK |
22342 | case DW_OP_const8u: |
22343 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22344 | i += 8; | |
22345 | break; | |
22346 | ||
21ae7a4d JK |
22347 | case DW_OP_constu: |
22348 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22349 | &bytes_read); | |
22350 | i += bytes_read; | |
22351 | break; | |
22352 | ||
22353 | case DW_OP_consts: | |
22354 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22355 | i += bytes_read; | |
22356 | break; | |
22357 | ||
22358 | case DW_OP_dup: | |
22359 | stack[stacki + 1] = stack[stacki]; | |
22360 | stacki++; | |
22361 | break; | |
22362 | ||
22363 | case DW_OP_plus: | |
22364 | stack[stacki - 1] += stack[stacki]; | |
22365 | stacki--; | |
22366 | break; | |
22367 | ||
22368 | case DW_OP_plus_uconst: | |
22369 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22370 | &bytes_read); | |
22371 | i += bytes_read; | |
22372 | break; | |
22373 | ||
22374 | case DW_OP_minus: | |
22375 | stack[stacki - 1] -= stack[stacki]; | |
22376 | stacki--; | |
22377 | break; | |
22378 | ||
22379 | case DW_OP_deref: | |
22380 | /* If we're not the last op, then we definitely can't encode | |
22381 | this using GDB's address_class enum. This is valid for partial | |
22382 | global symbols, although the variable's address will be bogus | |
22383 | in the psymtab. */ | |
22384 | if (i < size) | |
22385 | dwarf2_complex_location_expr_complaint (); | |
22386 | break; | |
22387 | ||
22388 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22389 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22390 | /* The top of the stack has the offset from the beginning |
22391 | of the thread control block at which the variable is located. */ | |
22392 | /* Nothing should follow this operator, so the top of stack would | |
22393 | be returned. */ | |
22394 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
22395 | address will be bogus in the psymtab. Make it always at least |
22396 | non-zero to not look as a variable garbage collected by linker | |
22397 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
22398 | if (i < size) |
22399 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 22400 | stack[stacki]++; |
21ae7a4d JK |
22401 | break; |
22402 | ||
22403 | case DW_OP_GNU_uninit: | |
22404 | break; | |
22405 | ||
3019eac3 | 22406 | case DW_OP_GNU_addr_index: |
49f6c839 | 22407 | case DW_OP_GNU_const_index: |
3019eac3 DE |
22408 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
22409 | &bytes_read); | |
22410 | i += bytes_read; | |
22411 | break; | |
22412 | ||
21ae7a4d JK |
22413 | default: |
22414 | { | |
f39c6ffd | 22415 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
22416 | |
22417 | if (name) | |
22418 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
22419 | name); | |
22420 | else | |
22421 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
22422 | op); | |
22423 | } | |
22424 | ||
22425 | return (stack[stacki]); | |
d53d4ac5 | 22426 | } |
3c6e0cb3 | 22427 | |
21ae7a4d JK |
22428 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
22429 | outside of the allocated space. Also enforce minimum>0. */ | |
22430 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
22431 | { | |
22432 | complaint (&symfile_complaints, | |
22433 | _("location description stack overflow")); | |
22434 | return 0; | |
22435 | } | |
22436 | ||
22437 | if (stacki <= 0) | |
22438 | { | |
22439 | complaint (&symfile_complaints, | |
22440 | _("location description stack underflow")); | |
22441 | return 0; | |
22442 | } | |
22443 | } | |
22444 | return (stack[stacki]); | |
c906108c SS |
22445 | } |
22446 | ||
22447 | /* memory allocation interface */ | |
22448 | ||
c906108c | 22449 | static struct dwarf_block * |
7b5a2f43 | 22450 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 22451 | { |
8d749320 | 22452 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
22453 | } |
22454 | ||
c906108c | 22455 | static struct die_info * |
b60c80d6 | 22456 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
22457 | { |
22458 | struct die_info *die; | |
b60c80d6 DJ |
22459 | size_t size = sizeof (struct die_info); |
22460 | ||
22461 | if (num_attrs > 1) | |
22462 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 22463 | |
b60c80d6 | 22464 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
22465 | memset (die, 0, sizeof (struct die_info)); |
22466 | return (die); | |
22467 | } | |
2e276125 JB |
22468 | |
22469 | \f | |
22470 | /* Macro support. */ | |
22471 | ||
233d95b5 JK |
22472 | /* Return file name relative to the compilation directory of file number I in |
22473 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 22474 | responsible for freeing it. */ |
233d95b5 | 22475 | |
2e276125 | 22476 | static char * |
233d95b5 | 22477 | file_file_name (int file, struct line_header *lh) |
2e276125 | 22478 | { |
6a83a1e6 EZ |
22479 | /* Is the file number a valid index into the line header's file name |
22480 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22481 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 22482 | { |
8c43009f | 22483 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 22484 | |
8c43009f PA |
22485 | if (!IS_ABSOLUTE_PATH (fe.name)) |
22486 | { | |
22487 | const char *dir = fe.include_dir (lh); | |
22488 | if (dir != NULL) | |
22489 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
22490 | } | |
22491 | return xstrdup (fe.name); | |
6a83a1e6 | 22492 | } |
2e276125 JB |
22493 | else |
22494 | { | |
6a83a1e6 EZ |
22495 | /* The compiler produced a bogus file number. We can at least |
22496 | record the macro definitions made in the file, even if we | |
22497 | won't be able to find the file by name. */ | |
22498 | char fake_name[80]; | |
9a619af0 | 22499 | |
8c042590 PM |
22500 | xsnprintf (fake_name, sizeof (fake_name), |
22501 | "<bad macro file number %d>", file); | |
2e276125 | 22502 | |
6e70227d | 22503 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
22504 | _("bad file number in macro information (%d)"), |
22505 | file); | |
2e276125 | 22506 | |
6a83a1e6 | 22507 | return xstrdup (fake_name); |
2e276125 JB |
22508 | } |
22509 | } | |
22510 | ||
233d95b5 JK |
22511 | /* Return the full name of file number I in *LH's file name table. |
22512 | Use COMP_DIR as the name of the current directory of the | |
22513 | compilation. The result is allocated using xmalloc; the caller is | |
22514 | responsible for freeing it. */ | |
22515 | static char * | |
22516 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
22517 | { | |
22518 | /* Is the file number a valid index into the line header's file name | |
22519 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22520 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
22521 | { |
22522 | char *relative = file_file_name (file, lh); | |
22523 | ||
22524 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
22525 | return relative; | |
b36cec19 PA |
22526 | return reconcat (relative, comp_dir, SLASH_STRING, |
22527 | relative, (char *) NULL); | |
233d95b5 JK |
22528 | } |
22529 | else | |
22530 | return file_file_name (file, lh); | |
22531 | } | |
22532 | ||
2e276125 JB |
22533 | |
22534 | static struct macro_source_file * | |
22535 | macro_start_file (int file, int line, | |
22536 | struct macro_source_file *current_file, | |
43f3e411 | 22537 | struct line_header *lh) |
2e276125 | 22538 | { |
233d95b5 JK |
22539 | /* File name relative to the compilation directory of this source file. */ |
22540 | char *file_name = file_file_name (file, lh); | |
2e276125 | 22541 | |
2e276125 | 22542 | if (! current_file) |
abc9d0dc | 22543 | { |
fc474241 DE |
22544 | /* Note: We don't create a macro table for this compilation unit |
22545 | at all until we actually get a filename. */ | |
43f3e411 | 22546 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 22547 | |
abc9d0dc TT |
22548 | /* If we have no current file, then this must be the start_file |
22549 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
22550 | current_file = macro_set_main (macro_table, file_name); |
22551 | macro_define_special (macro_table); | |
abc9d0dc | 22552 | } |
2e276125 | 22553 | else |
233d95b5 | 22554 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 22555 | |
233d95b5 | 22556 | xfree (file_name); |
6e70227d | 22557 | |
2e276125 JB |
22558 | return current_file; |
22559 | } | |
22560 | ||
2e276125 JB |
22561 | static const char * |
22562 | consume_improper_spaces (const char *p, const char *body) | |
22563 | { | |
22564 | if (*p == ' ') | |
22565 | { | |
4d3c2250 | 22566 | complaint (&symfile_complaints, |
3e43a32a MS |
22567 | _("macro definition contains spaces " |
22568 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 22569 | body); |
2e276125 JB |
22570 | |
22571 | while (*p == ' ') | |
22572 | p++; | |
22573 | } | |
22574 | ||
22575 | return p; | |
22576 | } | |
22577 | ||
22578 | ||
22579 | static void | |
22580 | parse_macro_definition (struct macro_source_file *file, int line, | |
22581 | const char *body) | |
22582 | { | |
22583 | const char *p; | |
22584 | ||
22585 | /* The body string takes one of two forms. For object-like macro | |
22586 | definitions, it should be: | |
22587 | ||
22588 | <macro name> " " <definition> | |
22589 | ||
22590 | For function-like macro definitions, it should be: | |
22591 | ||
22592 | <macro name> "() " <definition> | |
22593 | or | |
22594 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
22595 | ||
22596 | Spaces may appear only where explicitly indicated, and in the | |
22597 | <definition>. | |
22598 | ||
22599 | The Dwarf 2 spec says that an object-like macro's name is always | |
22600 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 22601 | the space when the macro's definition is the empty string. |
2e276125 JB |
22602 | |
22603 | The Dwarf 2 spec says that there should be no spaces between the | |
22604 | formal arguments in a function-like macro's formal argument list, | |
22605 | but versions of GCC around March 2002 include spaces after the | |
22606 | commas. */ | |
22607 | ||
22608 | ||
22609 | /* Find the extent of the macro name. The macro name is terminated | |
22610 | by either a space or null character (for an object-like macro) or | |
22611 | an opening paren (for a function-like macro). */ | |
22612 | for (p = body; *p; p++) | |
22613 | if (*p == ' ' || *p == '(') | |
22614 | break; | |
22615 | ||
22616 | if (*p == ' ' || *p == '\0') | |
22617 | { | |
22618 | /* It's an object-like macro. */ | |
22619 | int name_len = p - body; | |
3f8a7804 | 22620 | char *name = savestring (body, name_len); |
2e276125 JB |
22621 | const char *replacement; |
22622 | ||
22623 | if (*p == ' ') | |
22624 | replacement = body + name_len + 1; | |
22625 | else | |
22626 | { | |
4d3c2250 | 22627 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22628 | replacement = body + name_len; |
22629 | } | |
6e70227d | 22630 | |
2e276125 JB |
22631 | macro_define_object (file, line, name, replacement); |
22632 | ||
22633 | xfree (name); | |
22634 | } | |
22635 | else if (*p == '(') | |
22636 | { | |
22637 | /* It's a function-like macro. */ | |
3f8a7804 | 22638 | char *name = savestring (body, p - body); |
2e276125 JB |
22639 | int argc = 0; |
22640 | int argv_size = 1; | |
8d749320 | 22641 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
22642 | |
22643 | p++; | |
22644 | ||
22645 | p = consume_improper_spaces (p, body); | |
22646 | ||
22647 | /* Parse the formal argument list. */ | |
22648 | while (*p && *p != ')') | |
22649 | { | |
22650 | /* Find the extent of the current argument name. */ | |
22651 | const char *arg_start = p; | |
22652 | ||
22653 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
22654 | p++; | |
22655 | ||
22656 | if (! *p || p == arg_start) | |
4d3c2250 | 22657 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22658 | else |
22659 | { | |
22660 | /* Make sure argv has room for the new argument. */ | |
22661 | if (argc >= argv_size) | |
22662 | { | |
22663 | argv_size *= 2; | |
224c3ddb | 22664 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
22665 | } |
22666 | ||
3f8a7804 | 22667 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
22668 | } |
22669 | ||
22670 | p = consume_improper_spaces (p, body); | |
22671 | ||
22672 | /* Consume the comma, if present. */ | |
22673 | if (*p == ',') | |
22674 | { | |
22675 | p++; | |
22676 | ||
22677 | p = consume_improper_spaces (p, body); | |
22678 | } | |
22679 | } | |
22680 | ||
22681 | if (*p == ')') | |
22682 | { | |
22683 | p++; | |
22684 | ||
22685 | if (*p == ' ') | |
22686 | /* Perfectly formed definition, no complaints. */ | |
22687 | macro_define_function (file, line, name, | |
6e70227d | 22688 | argc, (const char **) argv, |
2e276125 JB |
22689 | p + 1); |
22690 | else if (*p == '\0') | |
22691 | { | |
22692 | /* Complain, but do define it. */ | |
4d3c2250 | 22693 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 22694 | macro_define_function (file, line, name, |
6e70227d | 22695 | argc, (const char **) argv, |
2e276125 JB |
22696 | p); |
22697 | } | |
22698 | else | |
22699 | /* Just complain. */ | |
4d3c2250 | 22700 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22701 | } |
22702 | else | |
22703 | /* Just complain. */ | |
4d3c2250 | 22704 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22705 | |
22706 | xfree (name); | |
22707 | { | |
22708 | int i; | |
22709 | ||
22710 | for (i = 0; i < argc; i++) | |
22711 | xfree (argv[i]); | |
22712 | } | |
22713 | xfree (argv); | |
22714 | } | |
22715 | else | |
4d3c2250 | 22716 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22717 | } |
22718 | ||
cf2c3c16 TT |
22719 | /* Skip some bytes from BYTES according to the form given in FORM. |
22720 | Returns the new pointer. */ | |
2e276125 | 22721 | |
d521ce57 TT |
22722 | static const gdb_byte * |
22723 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
22724 | enum dwarf_form form, |
22725 | unsigned int offset_size, | |
22726 | struct dwarf2_section_info *section) | |
2e276125 | 22727 | { |
cf2c3c16 | 22728 | unsigned int bytes_read; |
2e276125 | 22729 | |
cf2c3c16 | 22730 | switch (form) |
2e276125 | 22731 | { |
cf2c3c16 TT |
22732 | case DW_FORM_data1: |
22733 | case DW_FORM_flag: | |
22734 | ++bytes; | |
22735 | break; | |
22736 | ||
22737 | case DW_FORM_data2: | |
22738 | bytes += 2; | |
22739 | break; | |
22740 | ||
22741 | case DW_FORM_data4: | |
22742 | bytes += 4; | |
22743 | break; | |
22744 | ||
22745 | case DW_FORM_data8: | |
22746 | bytes += 8; | |
22747 | break; | |
22748 | ||
0224619f JK |
22749 | case DW_FORM_data16: |
22750 | bytes += 16; | |
22751 | break; | |
22752 | ||
cf2c3c16 TT |
22753 | case DW_FORM_string: |
22754 | read_direct_string (abfd, bytes, &bytes_read); | |
22755 | bytes += bytes_read; | |
22756 | break; | |
22757 | ||
22758 | case DW_FORM_sec_offset: | |
22759 | case DW_FORM_strp: | |
36586728 | 22760 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
22761 | bytes += offset_size; |
22762 | break; | |
22763 | ||
22764 | case DW_FORM_block: | |
22765 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
22766 | bytes += bytes_read; | |
22767 | break; | |
22768 | ||
22769 | case DW_FORM_block1: | |
22770 | bytes += 1 + read_1_byte (abfd, bytes); | |
22771 | break; | |
22772 | case DW_FORM_block2: | |
22773 | bytes += 2 + read_2_bytes (abfd, bytes); | |
22774 | break; | |
22775 | case DW_FORM_block4: | |
22776 | bytes += 4 + read_4_bytes (abfd, bytes); | |
22777 | break; | |
22778 | ||
22779 | case DW_FORM_sdata: | |
22780 | case DW_FORM_udata: | |
3019eac3 DE |
22781 | case DW_FORM_GNU_addr_index: |
22782 | case DW_FORM_GNU_str_index: | |
d521ce57 | 22783 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
22784 | if (bytes == NULL) |
22785 | { | |
22786 | dwarf2_section_buffer_overflow_complaint (section); | |
22787 | return NULL; | |
22788 | } | |
cf2c3c16 TT |
22789 | break; |
22790 | ||
663c44ac JK |
22791 | case DW_FORM_implicit_const: |
22792 | break; | |
22793 | ||
cf2c3c16 TT |
22794 | default: |
22795 | { | |
22796 | complain: | |
22797 | complaint (&symfile_complaints, | |
22798 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 22799 | form, get_section_name (section)); |
cf2c3c16 TT |
22800 | return NULL; |
22801 | } | |
2e276125 JB |
22802 | } |
22803 | ||
cf2c3c16 TT |
22804 | return bytes; |
22805 | } | |
757a13d0 | 22806 | |
cf2c3c16 TT |
22807 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
22808 | opcode. Returns an updated pointer to the macro data buffer; or, | |
22809 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 22810 | |
d521ce57 | 22811 | static const gdb_byte * |
cf2c3c16 | 22812 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
22813 | const gdb_byte **opcode_definitions, |
22814 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
22815 | bfd *abfd, |
22816 | unsigned int offset_size, | |
22817 | struct dwarf2_section_info *section) | |
22818 | { | |
22819 | unsigned int bytes_read, i; | |
22820 | unsigned long arg; | |
d521ce57 | 22821 | const gdb_byte *defn; |
2e276125 | 22822 | |
cf2c3c16 | 22823 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 22824 | { |
cf2c3c16 TT |
22825 | complaint (&symfile_complaints, |
22826 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
22827 | opcode); | |
22828 | return NULL; | |
22829 | } | |
2e276125 | 22830 | |
cf2c3c16 TT |
22831 | defn = opcode_definitions[opcode]; |
22832 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
22833 | defn += bytes_read; | |
2e276125 | 22834 | |
cf2c3c16 TT |
22835 | for (i = 0; i < arg; ++i) |
22836 | { | |
aead7601 SM |
22837 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
22838 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 22839 | section); |
cf2c3c16 TT |
22840 | if (mac_ptr == NULL) |
22841 | { | |
22842 | /* skip_form_bytes already issued the complaint. */ | |
22843 | return NULL; | |
22844 | } | |
22845 | } | |
757a13d0 | 22846 | |
cf2c3c16 TT |
22847 | return mac_ptr; |
22848 | } | |
757a13d0 | 22849 | |
cf2c3c16 TT |
22850 | /* A helper function which parses the header of a macro section. |
22851 | If the macro section is the extended (for now called "GNU") type, | |
22852 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
22853 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 22854 | |
d521ce57 TT |
22855 | static const gdb_byte * |
22856 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 22857 | bfd *abfd, |
d521ce57 | 22858 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
22859 | unsigned int *offset_size, |
22860 | int section_is_gnu) | |
22861 | { | |
22862 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 22863 | |
cf2c3c16 TT |
22864 | if (section_is_gnu) |
22865 | { | |
22866 | unsigned int version, flags; | |
757a13d0 | 22867 | |
cf2c3c16 | 22868 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 22869 | if (version != 4 && version != 5) |
cf2c3c16 TT |
22870 | { |
22871 | complaint (&symfile_complaints, | |
22872 | _("unrecognized version `%d' in .debug_macro section"), | |
22873 | version); | |
22874 | return NULL; | |
22875 | } | |
22876 | mac_ptr += 2; | |
757a13d0 | 22877 | |
cf2c3c16 TT |
22878 | flags = read_1_byte (abfd, mac_ptr); |
22879 | ++mac_ptr; | |
22880 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 22881 | |
cf2c3c16 TT |
22882 | if ((flags & 2) != 0) |
22883 | /* We don't need the line table offset. */ | |
22884 | mac_ptr += *offset_size; | |
757a13d0 | 22885 | |
cf2c3c16 TT |
22886 | /* Vendor opcode descriptions. */ |
22887 | if ((flags & 4) != 0) | |
22888 | { | |
22889 | unsigned int i, count; | |
757a13d0 | 22890 | |
cf2c3c16 TT |
22891 | count = read_1_byte (abfd, mac_ptr); |
22892 | ++mac_ptr; | |
22893 | for (i = 0; i < count; ++i) | |
22894 | { | |
22895 | unsigned int opcode, bytes_read; | |
22896 | unsigned long arg; | |
22897 | ||
22898 | opcode = read_1_byte (abfd, mac_ptr); | |
22899 | ++mac_ptr; | |
22900 | opcode_definitions[opcode] = mac_ptr; | |
22901 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22902 | mac_ptr += bytes_read; | |
22903 | mac_ptr += arg; | |
22904 | } | |
757a13d0 | 22905 | } |
cf2c3c16 | 22906 | } |
757a13d0 | 22907 | |
cf2c3c16 TT |
22908 | return mac_ptr; |
22909 | } | |
757a13d0 | 22910 | |
cf2c3c16 | 22911 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 22912 | including DW_MACRO_import. */ |
cf2c3c16 TT |
22913 | |
22914 | static void | |
d521ce57 TT |
22915 | dwarf_decode_macro_bytes (bfd *abfd, |
22916 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 22917 | struct macro_source_file *current_file, |
43f3e411 | 22918 | struct line_header *lh, |
cf2c3c16 | 22919 | struct dwarf2_section_info *section, |
36586728 | 22920 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 22921 | unsigned int offset_size, |
8fc3fc34 | 22922 | htab_t include_hash) |
cf2c3c16 | 22923 | { |
4d663531 | 22924 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22925 | enum dwarf_macro_record_type macinfo_type; |
22926 | int at_commandline; | |
d521ce57 | 22927 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22928 | |
cf2c3c16 TT |
22929 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22930 | &offset_size, section_is_gnu); | |
22931 | if (mac_ptr == NULL) | |
22932 | { | |
22933 | /* We already issued a complaint. */ | |
22934 | return; | |
22935 | } | |
757a13d0 JK |
22936 | |
22937 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22938 | GDB is still reading the definitions from command line. First | |
22939 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22940 | to create CURRENT_FILE for the main source holding also the command line | |
22941 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22942 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22943 | ||
22944 | at_commandline = 1; | |
22945 | ||
22946 | do | |
22947 | { | |
22948 | /* Do we at least have room for a macinfo type byte? */ | |
22949 | if (mac_ptr >= mac_end) | |
22950 | { | |
f664829e | 22951 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22952 | break; |
22953 | } | |
22954 | ||
aead7601 | 22955 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22956 | mac_ptr++; |
22957 | ||
cf2c3c16 TT |
22958 | /* Note that we rely on the fact that the corresponding GNU and |
22959 | DWARF constants are the same. */ | |
757a13d0 JK |
22960 | switch (macinfo_type) |
22961 | { | |
22962 | /* A zero macinfo type indicates the end of the macro | |
22963 | information. */ | |
22964 | case 0: | |
22965 | break; | |
2e276125 | 22966 | |
0af92d60 JK |
22967 | case DW_MACRO_define: |
22968 | case DW_MACRO_undef: | |
22969 | case DW_MACRO_define_strp: | |
22970 | case DW_MACRO_undef_strp: | |
22971 | case DW_MACRO_define_sup: | |
22972 | case DW_MACRO_undef_sup: | |
2e276125 | 22973 | { |
891d2f0b | 22974 | unsigned int bytes_read; |
2e276125 | 22975 | int line; |
d521ce57 | 22976 | const char *body; |
cf2c3c16 | 22977 | int is_define; |
2e276125 | 22978 | |
cf2c3c16 TT |
22979 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22980 | mac_ptr += bytes_read; | |
22981 | ||
0af92d60 JK |
22982 | if (macinfo_type == DW_MACRO_define |
22983 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22984 | { |
22985 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22986 | mac_ptr += bytes_read; | |
22987 | } | |
22988 | else | |
22989 | { | |
22990 | LONGEST str_offset; | |
22991 | ||
22992 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22993 | mac_ptr += offset_size; | |
2e276125 | 22994 | |
0af92d60 JK |
22995 | if (macinfo_type == DW_MACRO_define_sup |
22996 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22997 | || section_is_dwz) |
36586728 TT |
22998 | { |
22999 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
23000 | ||
23001 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
23002 | } | |
23003 | else | |
23004 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
23005 | } |
23006 | ||
0af92d60 JK |
23007 | is_define = (macinfo_type == DW_MACRO_define |
23008 | || macinfo_type == DW_MACRO_define_strp | |
23009 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 23010 | if (! current_file) |
757a13d0 JK |
23011 | { |
23012 | /* DWARF violation as no main source is present. */ | |
23013 | complaint (&symfile_complaints, | |
23014 | _("debug info with no main source gives macro %s " | |
23015 | "on line %d: %s"), | |
cf2c3c16 TT |
23016 | is_define ? _("definition") : _("undefinition"), |
23017 | line, body); | |
757a13d0 JK |
23018 | break; |
23019 | } | |
3e43a32a MS |
23020 | if ((line == 0 && !at_commandline) |
23021 | || (line != 0 && at_commandline)) | |
4d3c2250 | 23022 | complaint (&symfile_complaints, |
757a13d0 JK |
23023 | _("debug info gives %s macro %s with %s line %d: %s"), |
23024 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 23025 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
23026 | line == 0 ? _("zero") : _("non-zero"), line, body); |
23027 | ||
cf2c3c16 | 23028 | if (is_define) |
757a13d0 | 23029 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
23030 | else |
23031 | { | |
0af92d60 JK |
23032 | gdb_assert (macinfo_type == DW_MACRO_undef |
23033 | || macinfo_type == DW_MACRO_undef_strp | |
23034 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
23035 | macro_undef (current_file, line, body); |
23036 | } | |
2e276125 JB |
23037 | } |
23038 | break; | |
23039 | ||
0af92d60 | 23040 | case DW_MACRO_start_file: |
2e276125 | 23041 | { |
891d2f0b | 23042 | unsigned int bytes_read; |
2e276125 JB |
23043 | int line, file; |
23044 | ||
23045 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23046 | mac_ptr += bytes_read; | |
23047 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23048 | mac_ptr += bytes_read; | |
23049 | ||
3e43a32a MS |
23050 | if ((line == 0 && !at_commandline) |
23051 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
23052 | complaint (&symfile_complaints, |
23053 | _("debug info gives source %d included " | |
23054 | "from %s at %s line %d"), | |
23055 | file, at_commandline ? _("command-line") : _("file"), | |
23056 | line == 0 ? _("zero") : _("non-zero"), line); | |
23057 | ||
23058 | if (at_commandline) | |
23059 | { | |
0af92d60 | 23060 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 23061 | pass one. */ |
757a13d0 JK |
23062 | at_commandline = 0; |
23063 | } | |
23064 | else | |
43f3e411 | 23065 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
23066 | } |
23067 | break; | |
23068 | ||
0af92d60 | 23069 | case DW_MACRO_end_file: |
2e276125 | 23070 | if (! current_file) |
4d3c2250 | 23071 | complaint (&symfile_complaints, |
3e43a32a MS |
23072 | _("macro debug info has an unmatched " |
23073 | "`close_file' directive")); | |
2e276125 JB |
23074 | else |
23075 | { | |
23076 | current_file = current_file->included_by; | |
23077 | if (! current_file) | |
23078 | { | |
cf2c3c16 | 23079 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
23080 | |
23081 | /* GCC circa March 2002 doesn't produce the zero | |
23082 | type byte marking the end of the compilation | |
23083 | unit. Complain if it's not there, but exit no | |
23084 | matter what. */ | |
23085 | ||
23086 | /* Do we at least have room for a macinfo type byte? */ | |
23087 | if (mac_ptr >= mac_end) | |
23088 | { | |
f664829e | 23089 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
23090 | return; |
23091 | } | |
23092 | ||
23093 | /* We don't increment mac_ptr here, so this is just | |
23094 | a look-ahead. */ | |
aead7601 SM |
23095 | next_type |
23096 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
23097 | mac_ptr); | |
2e276125 | 23098 | if (next_type != 0) |
4d3c2250 | 23099 | complaint (&symfile_complaints, |
3e43a32a MS |
23100 | _("no terminating 0-type entry for " |
23101 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
23102 | |
23103 | return; | |
23104 | } | |
23105 | } | |
23106 | break; | |
23107 | ||
0af92d60 JK |
23108 | case DW_MACRO_import: |
23109 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
23110 | { |
23111 | LONGEST offset; | |
8fc3fc34 | 23112 | void **slot; |
a036ba48 TT |
23113 | bfd *include_bfd = abfd; |
23114 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 23115 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 23116 | int is_dwz = section_is_dwz; |
d521ce57 | 23117 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
23118 | |
23119 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
23120 | mac_ptr += offset_size; | |
23121 | ||
0af92d60 | 23122 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
23123 | { |
23124 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
23125 | ||
4d663531 | 23126 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 23127 | |
a036ba48 | 23128 | include_section = &dwz->macro; |
a32a8923 | 23129 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
23130 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
23131 | is_dwz = 1; | |
23132 | } | |
23133 | ||
23134 | new_mac_ptr = include_section->buffer + offset; | |
23135 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
23136 | ||
8fc3fc34 TT |
23137 | if (*slot != NULL) |
23138 | { | |
23139 | /* This has actually happened; see | |
23140 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
23141 | complaint (&symfile_complaints, | |
0af92d60 | 23142 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
23143 | ".debug_macro section")); |
23144 | } | |
23145 | else | |
23146 | { | |
d521ce57 | 23147 | *slot = (void *) new_mac_ptr; |
36586728 | 23148 | |
a036ba48 | 23149 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 23150 | include_mac_end, current_file, lh, |
36586728 | 23151 | section, section_is_gnu, is_dwz, |
4d663531 | 23152 | offset_size, include_hash); |
8fc3fc34 | 23153 | |
d521ce57 | 23154 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 23155 | } |
cf2c3c16 TT |
23156 | } |
23157 | break; | |
23158 | ||
2e276125 | 23159 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
23160 | if (!section_is_gnu) |
23161 | { | |
23162 | unsigned int bytes_read; | |
2e276125 | 23163 | |
ac298888 TT |
23164 | /* This reads the constant, but since we don't recognize |
23165 | any vendor extensions, we ignore it. */ | |
23166 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
23167 | mac_ptr += bytes_read; |
23168 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23169 | mac_ptr += bytes_read; | |
2e276125 | 23170 | |
cf2c3c16 TT |
23171 | /* We don't recognize any vendor extensions. */ |
23172 | break; | |
23173 | } | |
23174 | /* FALLTHROUGH */ | |
23175 | ||
23176 | default: | |
23177 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23178 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23179 | section); |
23180 | if (mac_ptr == NULL) | |
23181 | return; | |
23182 | break; | |
2e276125 | 23183 | } |
757a13d0 | 23184 | } while (macinfo_type != 0); |
2e276125 | 23185 | } |
8e19ed76 | 23186 | |
cf2c3c16 | 23187 | static void |
09262596 | 23188 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 23189 | int section_is_gnu) |
cf2c3c16 | 23190 | { |
bb5ed363 | 23191 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
23192 | struct line_header *lh = cu->line_header; |
23193 | bfd *abfd; | |
d521ce57 | 23194 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
23195 | struct macro_source_file *current_file = 0; |
23196 | enum dwarf_macro_record_type macinfo_type; | |
23197 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 23198 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 23199 | void **slot; |
09262596 DE |
23200 | struct dwarf2_section_info *section; |
23201 | const char *section_name; | |
23202 | ||
23203 | if (cu->dwo_unit != NULL) | |
23204 | { | |
23205 | if (section_is_gnu) | |
23206 | { | |
23207 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
23208 | section_name = ".debug_macro.dwo"; | |
23209 | } | |
23210 | else | |
23211 | { | |
23212 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
23213 | section_name = ".debug_macinfo.dwo"; | |
23214 | } | |
23215 | } | |
23216 | else | |
23217 | { | |
23218 | if (section_is_gnu) | |
23219 | { | |
23220 | section = &dwarf2_per_objfile->macro; | |
23221 | section_name = ".debug_macro"; | |
23222 | } | |
23223 | else | |
23224 | { | |
23225 | section = &dwarf2_per_objfile->macinfo; | |
23226 | section_name = ".debug_macinfo"; | |
23227 | } | |
23228 | } | |
cf2c3c16 | 23229 | |
bb5ed363 | 23230 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
23231 | if (section->buffer == NULL) |
23232 | { | |
fceca515 | 23233 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
23234 | return; |
23235 | } | |
a32a8923 | 23236 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
23237 | |
23238 | /* First pass: Find the name of the base filename. | |
23239 | This filename is needed in order to process all macros whose definition | |
23240 | (or undefinition) comes from the command line. These macros are defined | |
23241 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
23242 | associated to the base file. | |
23243 | ||
23244 | To determine the base file name, we scan the macro definitions until we | |
23245 | reach the first DW_MACINFO_start_file entry. We then initialize | |
23246 | CURRENT_FILE accordingly so that any macro definition found before the | |
23247 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
23248 | ||
23249 | mac_ptr = section->buffer + offset; | |
23250 | mac_end = section->buffer + section->size; | |
23251 | ||
23252 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
23253 | &offset_size, section_is_gnu); | |
23254 | if (mac_ptr == NULL) | |
23255 | { | |
23256 | /* We already issued a complaint. */ | |
23257 | return; | |
23258 | } | |
23259 | ||
23260 | do | |
23261 | { | |
23262 | /* Do we at least have room for a macinfo type byte? */ | |
23263 | if (mac_ptr >= mac_end) | |
23264 | { | |
23265 | /* Complaint is printed during the second pass as GDB will probably | |
23266 | stop the first pass earlier upon finding | |
23267 | DW_MACINFO_start_file. */ | |
23268 | break; | |
23269 | } | |
23270 | ||
aead7601 | 23271 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
23272 | mac_ptr++; |
23273 | ||
23274 | /* Note that we rely on the fact that the corresponding GNU and | |
23275 | DWARF constants are the same. */ | |
23276 | switch (macinfo_type) | |
23277 | { | |
23278 | /* A zero macinfo type indicates the end of the macro | |
23279 | information. */ | |
23280 | case 0: | |
23281 | break; | |
23282 | ||
0af92d60 JK |
23283 | case DW_MACRO_define: |
23284 | case DW_MACRO_undef: | |
cf2c3c16 TT |
23285 | /* Only skip the data by MAC_PTR. */ |
23286 | { | |
23287 | unsigned int bytes_read; | |
23288 | ||
23289 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23290 | mac_ptr += bytes_read; | |
23291 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23292 | mac_ptr += bytes_read; | |
23293 | } | |
23294 | break; | |
23295 | ||
0af92d60 | 23296 | case DW_MACRO_start_file: |
cf2c3c16 TT |
23297 | { |
23298 | unsigned int bytes_read; | |
23299 | int line, file; | |
23300 | ||
23301 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23302 | mac_ptr += bytes_read; | |
23303 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23304 | mac_ptr += bytes_read; | |
23305 | ||
43f3e411 | 23306 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
23307 | } |
23308 | break; | |
23309 | ||
0af92d60 | 23310 | case DW_MACRO_end_file: |
cf2c3c16 TT |
23311 | /* No data to skip by MAC_PTR. */ |
23312 | break; | |
23313 | ||
0af92d60 JK |
23314 | case DW_MACRO_define_strp: |
23315 | case DW_MACRO_undef_strp: | |
23316 | case DW_MACRO_define_sup: | |
23317 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
23318 | { |
23319 | unsigned int bytes_read; | |
23320 | ||
23321 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23322 | mac_ptr += bytes_read; | |
23323 | mac_ptr += offset_size; | |
23324 | } | |
23325 | break; | |
23326 | ||
0af92d60 JK |
23327 | case DW_MACRO_import: |
23328 | case DW_MACRO_import_sup: | |
cf2c3c16 | 23329 | /* Note that, according to the spec, a transparent include |
0af92d60 | 23330 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
23331 | skip this opcode. */ |
23332 | mac_ptr += offset_size; | |
23333 | break; | |
23334 | ||
23335 | case DW_MACINFO_vendor_ext: | |
23336 | /* Only skip the data by MAC_PTR. */ | |
23337 | if (!section_is_gnu) | |
23338 | { | |
23339 | unsigned int bytes_read; | |
23340 | ||
23341 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23342 | mac_ptr += bytes_read; | |
23343 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23344 | mac_ptr += bytes_read; | |
23345 | } | |
23346 | /* FALLTHROUGH */ | |
23347 | ||
23348 | default: | |
23349 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23350 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23351 | section); |
23352 | if (mac_ptr == NULL) | |
23353 | return; | |
23354 | break; | |
23355 | } | |
23356 | } while (macinfo_type != 0 && current_file == NULL); | |
23357 | ||
23358 | /* Second pass: Process all entries. | |
23359 | ||
23360 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
23361 | command-line macro definitions/undefinitions. This flag is unset when we | |
23362 | reach the first DW_MACINFO_start_file entry. */ | |
23363 | ||
fc4007c9 TT |
23364 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
23365 | htab_eq_pointer, | |
23366 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 23367 | mac_ptr = section->buffer + offset; |
fc4007c9 | 23368 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 23369 | *slot = (void *) mac_ptr; |
8fc3fc34 | 23370 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 23371 | current_file, lh, section, |
fc4007c9 TT |
23372 | section_is_gnu, 0, offset_size, |
23373 | include_hash.get ()); | |
cf2c3c16 TT |
23374 | } |
23375 | ||
8e19ed76 | 23376 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 23377 | if so return true else false. */ |
380bca97 | 23378 | |
8e19ed76 | 23379 | static int |
6e5a29e1 | 23380 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
23381 | { |
23382 | return (attr == NULL ? 0 : | |
23383 | attr->form == DW_FORM_block1 | |
23384 | || attr->form == DW_FORM_block2 | |
23385 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
23386 | || attr->form == DW_FORM_block |
23387 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 23388 | } |
4c2df51b | 23389 | |
c6a0999f JB |
23390 | /* Return non-zero if ATTR's value is a section offset --- classes |
23391 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
23392 | You may use DW_UNSND (attr) to retrieve such offsets. | |
23393 | ||
23394 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
23395 | may have a value that belongs to more than one of these classes; it | |
23396 | would be ambiguous if we did, because we use the same forms for all | |
23397 | of them. */ | |
380bca97 | 23398 | |
3690dd37 | 23399 | static int |
6e5a29e1 | 23400 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
23401 | { |
23402 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
23403 | || attr->form == DW_FORM_data8 |
23404 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
23405 | } |
23406 | ||
3690dd37 JB |
23407 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
23408 | zero otherwise. When this function returns true, you can apply | |
23409 | dwarf2_get_attr_constant_value to it. | |
23410 | ||
23411 | However, note that for some attributes you must check | |
23412 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
23413 | and DW_FORM_data8 are members of both the constant class, and of | |
23414 | the classes that contain offsets into other debug sections | |
23415 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
23416 | that, if an attribute's can be either a constant or one of the | |
23417 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
23418 | taken as section offsets, not constants. |
23419 | ||
23420 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
23421 | cannot handle that. */ | |
380bca97 | 23422 | |
3690dd37 | 23423 | static int |
6e5a29e1 | 23424 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
23425 | { |
23426 | switch (attr->form) | |
23427 | { | |
23428 | case DW_FORM_sdata: | |
23429 | case DW_FORM_udata: | |
23430 | case DW_FORM_data1: | |
23431 | case DW_FORM_data2: | |
23432 | case DW_FORM_data4: | |
23433 | case DW_FORM_data8: | |
663c44ac | 23434 | case DW_FORM_implicit_const: |
3690dd37 JB |
23435 | return 1; |
23436 | default: | |
23437 | return 0; | |
23438 | } | |
23439 | } | |
23440 | ||
7771576e SA |
23441 | |
23442 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
23443 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
23444 | ||
23445 | static int | |
6e5a29e1 | 23446 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
23447 | { |
23448 | switch (attr->form) | |
23449 | { | |
23450 | case DW_FORM_ref_addr: | |
23451 | case DW_FORM_ref1: | |
23452 | case DW_FORM_ref2: | |
23453 | case DW_FORM_ref4: | |
23454 | case DW_FORM_ref8: | |
23455 | case DW_FORM_ref_udata: | |
23456 | case DW_FORM_GNU_ref_alt: | |
23457 | return 1; | |
23458 | default: | |
23459 | return 0; | |
23460 | } | |
23461 | } | |
23462 | ||
3019eac3 DE |
23463 | /* Return the .debug_loc section to use for CU. |
23464 | For DWO files use .debug_loc.dwo. */ | |
23465 | ||
23466 | static struct dwarf2_section_info * | |
23467 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23468 | { | |
23469 | if (cu->dwo_unit) | |
43988095 JK |
23470 | { |
23471 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
23472 | ||
23473 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
23474 | } | |
23475 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23476 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23477 | } |
23478 | ||
8cf6f0b1 TT |
23479 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23480 | ||
23481 | static void | |
23482 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23483 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23484 | const struct attribute *attr) |
8cf6f0b1 | 23485 | { |
3019eac3 DE |
23486 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23487 | ||
23488 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
23489 | |
23490 | baton->per_cu = cu->per_cu; | |
23491 | gdb_assert (baton->per_cu); | |
23492 | /* We don't know how long the location list is, but make sure we | |
23493 | don't run off the edge of the section. */ | |
3019eac3 DE |
23494 | baton->size = section->size - DW_UNSND (attr); |
23495 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23496 | baton->base_address = cu->base_address; |
f664829e | 23497 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23498 | } |
23499 | ||
4c2df51b | 23500 | static void |
ff39bb5e | 23501 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23502 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23503 | { |
bb5ed363 | 23504 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23505 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23506 | |
3690dd37 | 23507 | if (attr_form_is_section_offset (attr) |
3019eac3 | 23508 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23509 | the section. If so, fall through to the complaint in the |
23510 | other branch. */ | |
3019eac3 | 23511 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 23512 | { |
0d53c4c4 | 23513 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23514 | |
8d749320 | 23515 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23516 | |
8cf6f0b1 | 23517 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23518 | |
d00adf39 | 23519 | if (cu->base_known == 0) |
0d53c4c4 | 23520 | complaint (&symfile_complaints, |
3e43a32a MS |
23521 | _("Location list used without " |
23522 | "specifying the CU base address.")); | |
4c2df51b | 23523 | |
f1e6e072 TT |
23524 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23525 | ? dwarf2_loclist_block_index | |
23526 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
23527 | SYMBOL_LOCATION_BATON (sym) = baton; |
23528 | } | |
23529 | else | |
23530 | { | |
23531 | struct dwarf2_locexpr_baton *baton; | |
23532 | ||
8d749320 | 23533 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
23534 | baton->per_cu = cu->per_cu; |
23535 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
23536 | |
23537 | if (attr_form_is_block (attr)) | |
23538 | { | |
23539 | /* Note that we're just copying the block's data pointer | |
23540 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
23541 | info_buffer for SYM's objfile; right now we never release |
23542 | that buffer, but when we do clean up properly this may | |
23543 | need to change. */ | |
0d53c4c4 DJ |
23544 | baton->size = DW_BLOCK (attr)->size; |
23545 | baton->data = DW_BLOCK (attr)->data; | |
23546 | } | |
23547 | else | |
23548 | { | |
23549 | dwarf2_invalid_attrib_class_complaint ("location description", | |
23550 | SYMBOL_NATURAL_NAME (sym)); | |
23551 | baton->size = 0; | |
0d53c4c4 | 23552 | } |
6e70227d | 23553 | |
f1e6e072 TT |
23554 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23555 | ? dwarf2_locexpr_block_index | |
23556 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
23557 | SYMBOL_LOCATION_BATON (sym) = baton; |
23558 | } | |
4c2df51b | 23559 | } |
6502dd73 | 23560 | |
9aa1f1e3 TT |
23561 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
23562 | came from a separate debuginfo file, then the master objfile is | |
23563 | returned. */ | |
ae0d2f24 UW |
23564 | |
23565 | struct objfile * | |
23566 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
23567 | { | |
9291a0cd | 23568 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
23569 | |
23570 | /* Return the master objfile, so that we can report and look up the | |
23571 | correct file containing this variable. */ | |
23572 | if (objfile->separate_debug_objfile_backlink) | |
23573 | objfile = objfile->separate_debug_objfile_backlink; | |
23574 | ||
23575 | return objfile; | |
23576 | } | |
23577 | ||
96408a79 SA |
23578 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
23579 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
23580 | CU_HEADERP first. */ | |
23581 | ||
23582 | static const struct comp_unit_head * | |
23583 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
23584 | struct dwarf2_per_cu_data *per_cu) | |
23585 | { | |
d521ce57 | 23586 | const gdb_byte *info_ptr; |
96408a79 SA |
23587 | |
23588 | if (per_cu->cu) | |
23589 | return &per_cu->cu->header; | |
23590 | ||
9c541725 | 23591 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
23592 | |
23593 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
23594 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
23595 | rcuh_kind::COMPILE); | |
96408a79 SA |
23596 | |
23597 | return cu_headerp; | |
23598 | } | |
23599 | ||
ae0d2f24 UW |
23600 | /* Return the address size given in the compilation unit header for CU. */ |
23601 | ||
98714339 | 23602 | int |
ae0d2f24 UW |
23603 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
23604 | { | |
96408a79 SA |
23605 | struct comp_unit_head cu_header_local; |
23606 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 23607 | |
96408a79 SA |
23608 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23609 | ||
23610 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
23611 | } |
23612 | ||
9eae7c52 TT |
23613 | /* Return the offset size given in the compilation unit header for CU. */ |
23614 | ||
23615 | int | |
23616 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
23617 | { | |
96408a79 SA |
23618 | struct comp_unit_head cu_header_local; |
23619 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 23620 | |
96408a79 SA |
23621 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23622 | ||
23623 | return cu_headerp->offset_size; | |
23624 | } | |
23625 | ||
23626 | /* See its dwarf2loc.h declaration. */ | |
23627 | ||
23628 | int | |
23629 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
23630 | { | |
23631 | struct comp_unit_head cu_header_local; | |
23632 | const struct comp_unit_head *cu_headerp; | |
23633 | ||
23634 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
23635 | ||
23636 | if (cu_headerp->version == 2) | |
23637 | return cu_headerp->addr_size; | |
23638 | else | |
23639 | return cu_headerp->offset_size; | |
181cebd4 JK |
23640 | } |
23641 | ||
9aa1f1e3 TT |
23642 | /* Return the text offset of the CU. The returned offset comes from |
23643 | this CU's objfile. If this objfile came from a separate debuginfo | |
23644 | file, then the offset may be different from the corresponding | |
23645 | offset in the parent objfile. */ | |
23646 | ||
23647 | CORE_ADDR | |
23648 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
23649 | { | |
bb3fa9d0 | 23650 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
23651 | |
23652 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23653 | } | |
23654 | ||
43988095 JK |
23655 | /* Return DWARF version number of PER_CU. */ |
23656 | ||
23657 | short | |
23658 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
23659 | { | |
23660 | return per_cu->dwarf_version; | |
23661 | } | |
23662 | ||
348e048f DE |
23663 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
23664 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
23665 | |
23666 | static struct dwarf2_per_cu_data * | |
9c541725 | 23667 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 23668 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
23669 | struct objfile *objfile) |
23670 | { | |
23671 | struct dwarf2_per_cu_data *this_cu; | |
23672 | int low, high; | |
36586728 | 23673 | const sect_offset *cu_off; |
ae038cb0 | 23674 | |
ae038cb0 DJ |
23675 | low = 0; |
23676 | high = dwarf2_per_objfile->n_comp_units - 1; | |
23677 | while (high > low) | |
23678 | { | |
36586728 | 23679 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 23680 | int mid = low + (high - low) / 2; |
9a619af0 | 23681 | |
36586728 | 23682 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 23683 | cu_off = &mid_cu->sect_off; |
36586728 | 23684 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 23685 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
23686 | high = mid; |
23687 | else | |
23688 | low = mid + 1; | |
23689 | } | |
23690 | gdb_assert (low == high); | |
36586728 | 23691 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
23692 | cu_off = &this_cu->sect_off; |
23693 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 23694 | { |
36586728 | 23695 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 23696 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
23697 | "offset 0x%x [in module %s]"), |
23698 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 23699 | |
9c541725 PA |
23700 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
23701 | <= sect_off); | |
ae038cb0 DJ |
23702 | return dwarf2_per_objfile->all_comp_units[low-1]; |
23703 | } | |
23704 | else | |
23705 | { | |
23706 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
23707 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
23708 | && sect_off >= this_cu->sect_off + this_cu->length) |
23709 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
23710 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
23711 | return this_cu; |
23712 | } | |
23713 | } | |
23714 | ||
23745b47 | 23715 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 23716 | |
9816fde3 | 23717 | static void |
23745b47 | 23718 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 23719 | { |
9816fde3 | 23720 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
23721 | per_cu->cu = cu; |
23722 | cu->per_cu = per_cu; | |
23723 | cu->objfile = per_cu->objfile; | |
93311388 | 23724 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
23725 | } |
23726 | ||
23727 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
23728 | ||
23729 | static void | |
95554aad TT |
23730 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
23731 | enum language pretend_language) | |
9816fde3 JK |
23732 | { |
23733 | struct attribute *attr; | |
23734 | ||
23735 | /* Set the language we're debugging. */ | |
23736 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
23737 | if (attr) | |
23738 | set_cu_language (DW_UNSND (attr), cu); | |
23739 | else | |
9cded63f | 23740 | { |
95554aad | 23741 | cu->language = pretend_language; |
9cded63f TT |
23742 | cu->language_defn = language_def (cu->language); |
23743 | } | |
dee91e82 | 23744 | |
7d45c7c3 | 23745 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
23746 | } |
23747 | ||
ae038cb0 DJ |
23748 | /* Release one cached compilation unit, CU. We unlink it from the tree |
23749 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
23750 | the caller is responsible for that. |
23751 | NOTE: DATA is a void * because this function is also used as a | |
23752 | cleanup routine. */ | |
ae038cb0 DJ |
23753 | |
23754 | static void | |
68dc6402 | 23755 | free_heap_comp_unit (void *data) |
ae038cb0 | 23756 | { |
9a3c8263 | 23757 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 23758 | |
23745b47 DE |
23759 | gdb_assert (cu->per_cu != NULL); |
23760 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
23761 | cu->per_cu = NULL; |
23762 | ||
23763 | obstack_free (&cu->comp_unit_obstack, NULL); | |
23764 | ||
23765 | xfree (cu); | |
23766 | } | |
23767 | ||
72bf9492 | 23768 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 23769 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 23770 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
23771 | |
23772 | static void | |
23773 | free_stack_comp_unit (void *data) | |
23774 | { | |
9a3c8263 | 23775 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 23776 | |
23745b47 DE |
23777 | gdb_assert (cu->per_cu != NULL); |
23778 | cu->per_cu->cu = NULL; | |
23779 | cu->per_cu = NULL; | |
23780 | ||
72bf9492 DJ |
23781 | obstack_free (&cu->comp_unit_obstack, NULL); |
23782 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
23783 | } |
23784 | ||
23785 | /* Free all cached compilation units. */ | |
23786 | ||
23787 | static void | |
23788 | free_cached_comp_units (void *data) | |
23789 | { | |
330cdd98 | 23790 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
23791 | } |
23792 | ||
23793 | /* Increase the age counter on each cached compilation unit, and free | |
23794 | any that are too old. */ | |
23795 | ||
23796 | static void | |
23797 | age_cached_comp_units (void) | |
23798 | { | |
23799 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23800 | ||
23801 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
23802 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23803 | while (per_cu != NULL) | |
23804 | { | |
23805 | per_cu->cu->last_used ++; | |
b4f54984 | 23806 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
23807 | dwarf2_mark (per_cu->cu); |
23808 | per_cu = per_cu->cu->read_in_chain; | |
23809 | } | |
23810 | ||
23811 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23812 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23813 | while (per_cu != NULL) | |
23814 | { | |
23815 | struct dwarf2_per_cu_data *next_cu; | |
23816 | ||
23817 | next_cu = per_cu->cu->read_in_chain; | |
23818 | ||
23819 | if (!per_cu->cu->mark) | |
23820 | { | |
68dc6402 | 23821 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
23822 | *last_chain = next_cu; |
23823 | } | |
23824 | else | |
23825 | last_chain = &per_cu->cu->read_in_chain; | |
23826 | ||
23827 | per_cu = next_cu; | |
23828 | } | |
23829 | } | |
23830 | ||
23831 | /* Remove a single compilation unit from the cache. */ | |
23832 | ||
23833 | static void | |
dee91e82 | 23834 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
23835 | { |
23836 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23837 | ||
23838 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23839 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23840 | while (per_cu != NULL) | |
23841 | { | |
23842 | struct dwarf2_per_cu_data *next_cu; | |
23843 | ||
23844 | next_cu = per_cu->cu->read_in_chain; | |
23845 | ||
dee91e82 | 23846 | if (per_cu == target_per_cu) |
ae038cb0 | 23847 | { |
68dc6402 | 23848 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 23849 | per_cu->cu = NULL; |
ae038cb0 DJ |
23850 | *last_chain = next_cu; |
23851 | break; | |
23852 | } | |
23853 | else | |
23854 | last_chain = &per_cu->cu->read_in_chain; | |
23855 | ||
23856 | per_cu = next_cu; | |
23857 | } | |
23858 | } | |
23859 | ||
fe3e1990 DJ |
23860 | /* Release all extra memory associated with OBJFILE. */ |
23861 | ||
23862 | void | |
23863 | dwarf2_free_objfile (struct objfile *objfile) | |
23864 | { | |
9a3c8263 SM |
23865 | dwarf2_per_objfile |
23866 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23867 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
23868 | |
23869 | if (dwarf2_per_objfile == NULL) | |
23870 | return; | |
23871 | ||
330cdd98 | 23872 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
23873 | } |
23874 | ||
dee91e82 DE |
23875 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23876 | We store these in a hash table separate from the DIEs, and preserve them | |
23877 | when the DIEs are flushed out of cache. | |
23878 | ||
23879 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23880 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23881 | or the type may come from a DWO file. Furthermore, while it's more logical |
23882 | to use per_cu->section+offset, with Fission the section with the data is in | |
23883 | the DWO file but we don't know that section at the point we need it. | |
23884 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23885 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23886 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23887 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23888 | |
dee91e82 | 23889 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23890 | { |
dee91e82 | 23891 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23892 | sect_offset sect_off; |
1c379e20 DJ |
23893 | struct type *type; |
23894 | }; | |
23895 | ||
dee91e82 | 23896 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23897 | |
23898 | static hashval_t | |
dee91e82 | 23899 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23900 | { |
9a3c8263 SM |
23901 | const struct dwarf2_per_cu_offset_and_type *ofs |
23902 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23903 | |
9c541725 | 23904 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23905 | } |
23906 | ||
dee91e82 | 23907 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23908 | |
23909 | static int | |
dee91e82 | 23910 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23911 | { |
9a3c8263 SM |
23912 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23913 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23914 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23915 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23916 | |
dee91e82 | 23917 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23918 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23919 | } |
23920 | ||
23921 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23922 | table if necessary. For convenience, return TYPE. |
23923 | ||
23924 | The DIEs reading must have careful ordering to: | |
23925 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23926 | reading current DIE. | |
23927 | * Not trying to dereference contents of still incompletely read in types | |
23928 | while reading in other DIEs. | |
23929 | * Enable referencing still incompletely read in types just by a pointer to | |
23930 | the type without accessing its fields. | |
23931 | ||
23932 | Therefore caller should follow these rules: | |
23933 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23934 | before building the type and calling set_die_type. | |
e71ec853 | 23935 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23936 | possible before fetching more types to complete the current type. |
23937 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23938 | |
f792889a | 23939 | static struct type * |
1c379e20 DJ |
23940 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23941 | { | |
dee91e82 | 23942 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23943 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23944 | struct attribute *attr; |
23945 | struct dynamic_prop prop; | |
1c379e20 | 23946 | |
b4ba55a1 JB |
23947 | /* For Ada types, make sure that the gnat-specific data is always |
23948 | initialized (if not already set). There are a few types where | |
23949 | we should not be doing so, because the type-specific area is | |
23950 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23951 | where the type-specific area is used to store the floatformat). | |
23952 | But this is not a problem, because the gnat-specific information | |
23953 | is actually not needed for these types. */ | |
23954 | if (need_gnat_info (cu) | |
23955 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23956 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23957 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23958 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23959 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23960 | && !HAVE_GNAT_AUX_INFO (type)) |
23961 | INIT_GNAT_SPECIFIC (type); | |
23962 | ||
3f2f83dd KB |
23963 | /* Read DW_AT_allocated and set in type. */ |
23964 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23965 | if (attr_form_is_block (attr)) | |
23966 | { | |
23967 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23968 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23969 | } | |
23970 | else if (attr != NULL) | |
23971 | { | |
23972 | complaint (&symfile_complaints, | |
9c541725 PA |
23973 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23974 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23975 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23976 | } |
23977 | ||
23978 | /* Read DW_AT_associated and set in type. */ | |
23979 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23980 | if (attr_form_is_block (attr)) | |
23981 | { | |
23982 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23983 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23984 | } | |
23985 | else if (attr != NULL) | |
23986 | { | |
23987 | complaint (&symfile_complaints, | |
9c541725 PA |
23988 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23989 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23990 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23991 | } |
23992 | ||
3cdcd0ce JB |
23993 | /* Read DW_AT_data_location and set in type. */ |
23994 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23995 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23996 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23997 | |
dee91e82 | 23998 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23999 | { |
dee91e82 DE |
24000 | dwarf2_per_objfile->die_type_hash = |
24001 | htab_create_alloc_ex (127, | |
24002 | per_cu_offset_and_type_hash, | |
24003 | per_cu_offset_and_type_eq, | |
24004 | NULL, | |
24005 | &objfile->objfile_obstack, | |
24006 | hashtab_obstack_allocate, | |
24007 | dummy_obstack_deallocate); | |
f792889a | 24008 | } |
1c379e20 | 24009 | |
dee91e82 | 24010 | ofs.per_cu = cu->per_cu; |
9c541725 | 24011 | ofs.sect_off = die->sect_off; |
1c379e20 | 24012 | ofs.type = type; |
dee91e82 DE |
24013 | slot = (struct dwarf2_per_cu_offset_and_type **) |
24014 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
24015 | if (*slot) |
24016 | complaint (&symfile_complaints, | |
24017 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 24018 | to_underlying (die->sect_off)); |
8d749320 SM |
24019 | *slot = XOBNEW (&objfile->objfile_obstack, |
24020 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 24021 | **slot = ofs; |
f792889a | 24022 | return type; |
1c379e20 DJ |
24023 | } |
24024 | ||
9c541725 | 24025 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 24026 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
24027 | |
24028 | static struct type * | |
9c541725 | 24029 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 24030 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 24031 | { |
dee91e82 | 24032 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 24033 | |
dee91e82 | 24034 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 24035 | return NULL; |
1c379e20 | 24036 | |
dee91e82 | 24037 | ofs.per_cu = per_cu; |
9c541725 | 24038 | ofs.sect_off = sect_off; |
9a3c8263 SM |
24039 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
24040 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
24041 | if (slot) |
24042 | return slot->type; | |
24043 | else | |
24044 | return NULL; | |
24045 | } | |
24046 | ||
02142a6c | 24047 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
24048 | or return NULL if DIE does not have a saved type. */ |
24049 | ||
24050 | static struct type * | |
24051 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
24052 | { | |
9c541725 | 24053 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
24054 | } |
24055 | ||
10b3939b DJ |
24056 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
24057 | ||
24058 | static void | |
24059 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
24060 | struct dwarf2_per_cu_data *ref_per_cu) | |
24061 | { | |
24062 | void **slot; | |
24063 | ||
24064 | if (cu->dependencies == NULL) | |
24065 | cu->dependencies | |
24066 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
24067 | NULL, &cu->comp_unit_obstack, | |
24068 | hashtab_obstack_allocate, | |
24069 | dummy_obstack_deallocate); | |
24070 | ||
24071 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
24072 | if (*slot == NULL) | |
24073 | *slot = ref_per_cu; | |
24074 | } | |
1c379e20 | 24075 | |
f504f079 DE |
24076 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
24077 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
24078 | cache that we must keep because we are keeping CU. */ |
24079 | ||
10b3939b DJ |
24080 | static int |
24081 | dwarf2_mark_helper (void **slot, void *data) | |
24082 | { | |
24083 | struct dwarf2_per_cu_data *per_cu; | |
24084 | ||
24085 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
24086 | |
24087 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
24088 | reading of the chain. As such dependencies remain valid it is not much | |
24089 | useful to track and undo them during QUIT cleanups. */ | |
24090 | if (per_cu->cu == NULL) | |
24091 | return 1; | |
24092 | ||
10b3939b DJ |
24093 | if (per_cu->cu->mark) |
24094 | return 1; | |
24095 | per_cu->cu->mark = 1; | |
24096 | ||
24097 | if (per_cu->cu->dependencies != NULL) | |
24098 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
24099 | ||
24100 | return 1; | |
24101 | } | |
24102 | ||
f504f079 DE |
24103 | /* Set the mark field in CU and in every other compilation unit in the |
24104 | cache that we must keep because we are keeping CU. */ | |
24105 | ||
ae038cb0 DJ |
24106 | static void |
24107 | dwarf2_mark (struct dwarf2_cu *cu) | |
24108 | { | |
24109 | if (cu->mark) | |
24110 | return; | |
24111 | cu->mark = 1; | |
10b3939b DJ |
24112 | if (cu->dependencies != NULL) |
24113 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
24114 | } |
24115 | ||
24116 | static void | |
24117 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
24118 | { | |
24119 | while (per_cu) | |
24120 | { | |
24121 | per_cu->cu->mark = 0; | |
24122 | per_cu = per_cu->cu->read_in_chain; | |
24123 | } | |
72bf9492 DJ |
24124 | } |
24125 | ||
72bf9492 DJ |
24126 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
24127 | is its offset in .debug_info for this objfile. */ | |
24128 | ||
24129 | static hashval_t | |
24130 | partial_die_hash (const void *item) | |
24131 | { | |
9a3c8263 SM |
24132 | const struct partial_die_info *part_die |
24133 | = (const struct partial_die_info *) item; | |
9a619af0 | 24134 | |
9c541725 | 24135 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
24136 | } |
24137 | ||
24138 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
24139 | are equal if they have the same offset. */ | |
24140 | ||
24141 | static int | |
24142 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
24143 | { | |
9a3c8263 SM |
24144 | const struct partial_die_info *part_die_lhs |
24145 | = (const struct partial_die_info *) item_lhs; | |
24146 | const struct partial_die_info *part_die_rhs | |
24147 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 24148 | |
9c541725 | 24149 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
24150 | } |
24151 | ||
b4f54984 DE |
24152 | static struct cmd_list_element *set_dwarf_cmdlist; |
24153 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
24154 | |
24155 | static void | |
981a3fb3 | 24156 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 24157 | { |
b4f54984 | 24158 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 24159 | gdb_stdout); |
ae038cb0 DJ |
24160 | } |
24161 | ||
24162 | static void | |
981a3fb3 | 24163 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 24164 | { |
b4f54984 | 24165 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
24166 | } |
24167 | ||
4bf44c1c | 24168 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
24169 | |
24170 | static void | |
c1bd65d0 | 24171 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 24172 | { |
9a3c8263 | 24173 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 24174 | int ix; |
8b70b953 | 24175 | |
626f2d1c TT |
24176 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
24177 | cleaning up. */ | |
24178 | dwarf2_per_objfile = NULL; | |
24179 | ||
59b0c7c1 JB |
24180 | for (ix = 0; ix < data->n_comp_units; ++ix) |
24181 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 24182 | |
59b0c7c1 | 24183 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 24184 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
24185 | data->all_type_units[ix]->per_cu.imported_symtabs); |
24186 | xfree (data->all_type_units); | |
95554aad | 24187 | |
8b70b953 | 24188 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
24189 | |
24190 | if (data->dwo_files) | |
24191 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
24192 | if (data->dwp_file) |
24193 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
24194 | |
24195 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
24196 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
3f563c84 PA |
24197 | |
24198 | if (data->index_table != NULL) | |
24199 | data->index_table->~mapped_index (); | |
9291a0cd TT |
24200 | } |
24201 | ||
24202 | \f | |
ae2de4f8 | 24203 | /* The "save gdb-index" command. */ |
9291a0cd | 24204 | |
bc8f2430 JK |
24205 | /* In-memory buffer to prepare data to be written later to a file. */ |
24206 | class data_buf | |
9291a0cd | 24207 | { |
bc8f2430 | 24208 | public: |
bc8f2430 JK |
24209 | /* Copy DATA to the end of the buffer. */ |
24210 | template<typename T> | |
24211 | void append_data (const T &data) | |
24212 | { | |
24213 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
24214 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 24215 | grow (sizeof (data))); |
bc8f2430 | 24216 | } |
b89be57b | 24217 | |
c2f134ac PA |
24218 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
24219 | terminating zero is appended too. */ | |
bc8f2430 JK |
24220 | void append_cstr0 (const char *cstr) |
24221 | { | |
24222 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
24223 | std::copy (cstr, cstr + size, grow (size)); |
24224 | } | |
24225 | ||
24226 | /* Accept a host-format integer in VAL and append it to the buffer | |
24227 | as a target-format integer which is LEN bytes long. */ | |
24228 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
24229 | { | |
24230 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 24231 | } |
9291a0cd | 24232 | |
bc8f2430 JK |
24233 | /* Return the size of the buffer. */ |
24234 | size_t size () const | |
24235 | { | |
24236 | return m_vec.size (); | |
24237 | } | |
24238 | ||
24239 | /* Write the buffer to FILE. */ | |
24240 | void file_write (FILE *file) const | |
24241 | { | |
a81e6d4d PA |
24242 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
24243 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
24244 | } |
24245 | ||
24246 | private: | |
c2f134ac PA |
24247 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
24248 | the start of the new block. */ | |
24249 | gdb_byte *grow (size_t size) | |
24250 | { | |
24251 | m_vec.resize (m_vec.size () + size); | |
24252 | return &*m_vec.end () - size; | |
24253 | } | |
24254 | ||
d5722aa2 | 24255 | gdb::byte_vector m_vec; |
bc8f2430 | 24256 | }; |
9291a0cd TT |
24257 | |
24258 | /* An entry in the symbol table. */ | |
24259 | struct symtab_index_entry | |
24260 | { | |
24261 | /* The name of the symbol. */ | |
24262 | const char *name; | |
24263 | /* The offset of the name in the constant pool. */ | |
24264 | offset_type index_offset; | |
24265 | /* A sorted vector of the indices of all the CUs that hold an object | |
24266 | of this name. */ | |
bc8f2430 | 24267 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
24268 | }; |
24269 | ||
24270 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
24271 | struct mapped_symtab | |
24272 | { | |
bc8f2430 JK |
24273 | mapped_symtab () |
24274 | { | |
24275 | data.resize (1024); | |
24276 | } | |
b89be57b | 24277 | |
bc8f2430 | 24278 | offset_type n_elements = 0; |
4b76cda9 | 24279 | std::vector<symtab_index_entry> data; |
bc8f2430 | 24280 | }; |
9291a0cd | 24281 | |
bc8f2430 | 24282 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
24283 | the slot. |
24284 | ||
24285 | Function is used only during write_hash_table so no index format backward | |
24286 | compatibility is needed. */ | |
b89be57b | 24287 | |
4b76cda9 | 24288 | static symtab_index_entry & |
9291a0cd TT |
24289 | find_slot (struct mapped_symtab *symtab, const char *name) |
24290 | { | |
559a7a62 | 24291 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 24292 | |
bc8f2430 JK |
24293 | index = hash & (symtab->data.size () - 1); |
24294 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
24295 | |
24296 | for (;;) | |
24297 | { | |
4b76cda9 PA |
24298 | if (symtab->data[index].name == NULL |
24299 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
24300 | return symtab->data[index]; |
24301 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
24302 | } |
24303 | } | |
24304 | ||
24305 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 24306 | |
9291a0cd TT |
24307 | static void |
24308 | hash_expand (struct mapped_symtab *symtab) | |
24309 | { | |
bc8f2430 | 24310 | auto old_entries = std::move (symtab->data); |
9291a0cd | 24311 | |
bc8f2430 JK |
24312 | symtab->data.clear (); |
24313 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 24314 | |
bc8f2430 | 24315 | for (auto &it : old_entries) |
4b76cda9 | 24316 | if (it.name != NULL) |
bc8f2430 | 24317 | { |
4b76cda9 | 24318 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
24319 | ref = std::move (it); |
24320 | } | |
9291a0cd TT |
24321 | } |
24322 | ||
156942c7 DE |
24323 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
24324 | CU_INDEX is the index of the CU in which the symbol appears. | |
24325 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 24326 | |
9291a0cd TT |
24327 | static void |
24328 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 24329 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
24330 | offset_type cu_index) |
24331 | { | |
156942c7 | 24332 | offset_type cu_index_and_attrs; |
9291a0cd TT |
24333 | |
24334 | ++symtab->n_elements; | |
bc8f2430 | 24335 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
24336 | hash_expand (symtab); |
24337 | ||
4b76cda9 PA |
24338 | symtab_index_entry &slot = find_slot (symtab, name); |
24339 | if (slot.name == NULL) | |
9291a0cd | 24340 | { |
4b76cda9 | 24341 | slot.name = name; |
156942c7 | 24342 | /* index_offset is set later. */ |
9291a0cd | 24343 | } |
156942c7 DE |
24344 | |
24345 | cu_index_and_attrs = 0; | |
24346 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
24347 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
24348 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
24349 | ||
24350 | /* We don't want to record an index value twice as we want to avoid the | |
24351 | duplication. | |
24352 | We process all global symbols and then all static symbols | |
24353 | (which would allow us to avoid the duplication by only having to check | |
24354 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
24355 | To keep things simple we don't worry about the duplication here and | |
24356 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 24357 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
24358 | } |
24359 | ||
24360 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
24361 | ||
24362 | static void | |
24363 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
24364 | { | |
4b76cda9 | 24365 | for (auto &entry : symtab->data) |
156942c7 | 24366 | { |
4b76cda9 | 24367 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 24368 | { |
4b76cda9 | 24369 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
24370 | std::sort (cu_indices.begin (), cu_indices.end ()); |
24371 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
24372 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
24373 | } |
24374 | } | |
9291a0cd TT |
24375 | } |
24376 | ||
bc8f2430 JK |
24377 | /* A form of 'const char *' suitable for container keys. Only the |
24378 | pointer is stored. The strings themselves are compared, not the | |
24379 | pointers. */ | |
24380 | class c_str_view | |
9291a0cd | 24381 | { |
bc8f2430 JK |
24382 | public: |
24383 | c_str_view (const char *cstr) | |
24384 | : m_cstr (cstr) | |
24385 | {} | |
9291a0cd | 24386 | |
bc8f2430 JK |
24387 | bool operator== (const c_str_view &other) const |
24388 | { | |
24389 | return strcmp (m_cstr, other.m_cstr) == 0; | |
24390 | } | |
9291a0cd | 24391 | |
bc8f2430 JK |
24392 | private: |
24393 | friend class c_str_view_hasher; | |
24394 | const char *const m_cstr; | |
24395 | }; | |
9291a0cd | 24396 | |
bc8f2430 JK |
24397 | /* A std::unordered_map::hasher for c_str_view that uses the right |
24398 | hash function for strings in a mapped index. */ | |
24399 | class c_str_view_hasher | |
24400 | { | |
24401 | public: | |
24402 | size_t operator () (const c_str_view &x) const | |
24403 | { | |
24404 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
24405 | } | |
24406 | }; | |
b89be57b | 24407 | |
bc8f2430 JK |
24408 | /* A std::unordered_map::hasher for std::vector<>. */ |
24409 | template<typename T> | |
24410 | class vector_hasher | |
9291a0cd | 24411 | { |
bc8f2430 JK |
24412 | public: |
24413 | size_t operator () (const std::vector<T> &key) const | |
24414 | { | |
24415 | return iterative_hash (key.data (), | |
24416 | sizeof (key.front ()) * key.size (), 0); | |
24417 | } | |
24418 | }; | |
9291a0cd | 24419 | |
bc8f2430 JK |
24420 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
24421 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 24422 | |
bc8f2430 JK |
24423 | static void |
24424 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
24425 | { | |
24426 | { | |
24427 | /* Elements are sorted vectors of the indices of all the CUs that | |
24428 | hold an object of this name. */ | |
24429 | std::unordered_map<std::vector<offset_type>, offset_type, | |
24430 | vector_hasher<offset_type>> | |
24431 | symbol_hash_table; | |
24432 | ||
24433 | /* We add all the index vectors to the constant pool first, to | |
24434 | ensure alignment is ok. */ | |
4b76cda9 | 24435 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 24436 | { |
4b76cda9 | 24437 | if (entry.name == NULL) |
bc8f2430 | 24438 | continue; |
4b76cda9 | 24439 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
24440 | |
24441 | /* Finding before inserting is faster than always trying to | |
24442 | insert, because inserting always allocates a node, does the | |
24443 | lookup, and then destroys the new node if another node | |
24444 | already had the same key. C++17 try_emplace will avoid | |
24445 | this. */ | |
24446 | const auto found | |
4b76cda9 | 24447 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
24448 | if (found != symbol_hash_table.end ()) |
24449 | { | |
4b76cda9 | 24450 | entry.index_offset = found->second; |
70a1152b PA |
24451 | continue; |
24452 | } | |
24453 | ||
4b76cda9 PA |
24454 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
24455 | entry.index_offset = cpool.size (); | |
24456 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
24457 | for (const auto index : entry.cu_indices) | |
24458 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
24459 | } |
24460 | } | |
9291a0cd TT |
24461 | |
24462 | /* Now write out the hash table. */ | |
bc8f2430 | 24463 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 24464 | for (const auto &entry : symtab->data) |
9291a0cd TT |
24465 | { |
24466 | offset_type str_off, vec_off; | |
24467 | ||
4b76cda9 | 24468 | if (entry.name != NULL) |
9291a0cd | 24469 | { |
4b76cda9 | 24470 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 24471 | if (insertpair.second) |
4b76cda9 | 24472 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 24473 | str_off = insertpair.first->second; |
4b76cda9 | 24474 | vec_off = entry.index_offset; |
9291a0cd TT |
24475 | } |
24476 | else | |
24477 | { | |
24478 | /* While 0 is a valid constant pool index, it is not valid | |
24479 | to have 0 for both offsets. */ | |
24480 | str_off = 0; | |
24481 | vec_off = 0; | |
24482 | } | |
24483 | ||
bc8f2430 JK |
24484 | output.append_data (MAYBE_SWAP (str_off)); |
24485 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 24486 | } |
9291a0cd TT |
24487 | } |
24488 | ||
bc8f2430 | 24489 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
24490 | |
24491 | /* Helper struct for building the address table. */ | |
24492 | struct addrmap_index_data | |
24493 | { | |
bc8f2430 JK |
24494 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
24495 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
24496 | {} | |
24497 | ||
0a5429f6 | 24498 | struct objfile *objfile; |
bc8f2430 JK |
24499 | data_buf &addr_vec; |
24500 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
24501 | |
24502 | /* Non-zero if the previous_* fields are valid. | |
24503 | We can't write an entry until we see the next entry (since it is only then | |
24504 | that we know the end of the entry). */ | |
24505 | int previous_valid; | |
24506 | /* Index of the CU in the table of all CUs in the index file. */ | |
24507 | unsigned int previous_cu_index; | |
0963b4bd | 24508 | /* Start address of the CU. */ |
0a5429f6 DE |
24509 | CORE_ADDR previous_cu_start; |
24510 | }; | |
24511 | ||
bc8f2430 | 24512 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 24513 | |
9291a0cd | 24514 | static void |
bc8f2430 | 24515 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 24516 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 24517 | { |
9291a0cd TT |
24518 | CORE_ADDR baseaddr; |
24519 | ||
24520 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
24521 | ||
c2f134ac PA |
24522 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
24523 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 24524 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
24525 | } |
24526 | ||
24527 | /* Worker function for traversing an addrmap to build the address table. */ | |
24528 | ||
24529 | static int | |
24530 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
24531 | { | |
9a3c8263 SM |
24532 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
24533 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
24534 | |
24535 | if (data->previous_valid) | |
bc8f2430 | 24536 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
24537 | data->previous_cu_start, start_addr, |
24538 | data->previous_cu_index); | |
24539 | ||
24540 | data->previous_cu_start = start_addr; | |
24541 | if (pst != NULL) | |
24542 | { | |
bc8f2430 JK |
24543 | const auto it = data->cu_index_htab.find (pst); |
24544 | gdb_assert (it != data->cu_index_htab.cend ()); | |
24545 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
24546 | data->previous_valid = 1; |
24547 | } | |
24548 | else | |
bc8f2430 | 24549 | data->previous_valid = 0; |
0a5429f6 DE |
24550 | |
24551 | return 0; | |
24552 | } | |
24553 | ||
bc8f2430 | 24554 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
24555 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
24556 | in the index file. */ | |
24557 | ||
24558 | static void | |
bc8f2430 JK |
24559 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
24560 | psym_index_map &cu_index_htab) | |
0a5429f6 | 24561 | { |
bc8f2430 | 24562 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
24563 | |
24564 | /* When writing the address table, we have to cope with the fact that | |
24565 | the addrmap iterator only provides the start of a region; we have to | |
24566 | wait until the next invocation to get the start of the next region. */ | |
24567 | ||
24568 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
24569 | addrmap_index_data.previous_valid = 0; |
24570 | ||
24571 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
24572 | &addrmap_index_data); | |
24573 | ||
24574 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
24575 | is valid, but we should still handle it. | |
24576 | The end address is recorded as the start of the next region, but that | |
24577 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
24578 | anyway. */ | |
24579 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 24580 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
24581 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
24582 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
24583 | } |
24584 | ||
156942c7 DE |
24585 | /* Return the symbol kind of PSYM. */ |
24586 | ||
24587 | static gdb_index_symbol_kind | |
24588 | symbol_kind (struct partial_symbol *psym) | |
24589 | { | |
24590 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
24591 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
24592 | ||
24593 | switch (domain) | |
24594 | { | |
24595 | case VAR_DOMAIN: | |
24596 | switch (aclass) | |
24597 | { | |
24598 | case LOC_BLOCK: | |
24599 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
24600 | case LOC_TYPEDEF: | |
24601 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24602 | case LOC_COMPUTED: | |
24603 | case LOC_CONST_BYTES: | |
24604 | case LOC_OPTIMIZED_OUT: | |
24605 | case LOC_STATIC: | |
24606 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24607 | case LOC_CONST: | |
24608 | /* Note: It's currently impossible to recognize psyms as enum values | |
24609 | short of reading the type info. For now punt. */ | |
24610 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24611 | default: | |
24612 | /* There are other LOC_FOO values that one might want to classify | |
24613 | as variables, but dwarf2read.c doesn't currently use them. */ | |
24614 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24615 | } | |
24616 | case STRUCT_DOMAIN: | |
24617 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24618 | default: | |
24619 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24620 | } | |
24621 | } | |
24622 | ||
9291a0cd | 24623 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 24624 | |
9291a0cd TT |
24625 | static void |
24626 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 24627 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
24628 | struct partial_symbol **psymp, |
24629 | int count, | |
987d643c TT |
24630 | offset_type cu_index, |
24631 | int is_static) | |
9291a0cd TT |
24632 | { |
24633 | for (; count-- > 0; ++psymp) | |
24634 | { | |
156942c7 | 24635 | struct partial_symbol *psym = *psymp; |
987d643c | 24636 | |
156942c7 | 24637 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 24638 | error (_("Ada is not currently supported by the index")); |
987d643c | 24639 | |
987d643c | 24640 | /* Only add a given psymbol once. */ |
bc8f2430 | 24641 | if (psyms_seen.insert (psym).second) |
987d643c | 24642 | { |
156942c7 DE |
24643 | gdb_index_symbol_kind kind = symbol_kind (psym); |
24644 | ||
156942c7 DE |
24645 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
24646 | is_static, kind, cu_index); | |
987d643c | 24647 | } |
9291a0cd TT |
24648 | } |
24649 | } | |
24650 | ||
1fd400ff TT |
24651 | /* A helper struct used when iterating over debug_types. */ |
24652 | struct signatured_type_index_data | |
24653 | { | |
bc8f2430 JK |
24654 | signatured_type_index_data (data_buf &types_list_, |
24655 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
24656 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
24657 | {} | |
24658 | ||
1fd400ff TT |
24659 | struct objfile *objfile; |
24660 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
24661 | data_buf &types_list; |
24662 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
24663 | int cu_index; |
24664 | }; | |
24665 | ||
24666 | /* A helper function that writes a single signatured_type to an | |
24667 | obstack. */ | |
b89be57b | 24668 | |
1fd400ff TT |
24669 | static int |
24670 | write_one_signatured_type (void **slot, void *d) | |
24671 | { | |
9a3c8263 SM |
24672 | struct signatured_type_index_data *info |
24673 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 24674 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 24675 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
24676 | |
24677 | write_psymbols (info->symtab, | |
987d643c | 24678 | info->psyms_seen, |
af5bf4ad | 24679 | &info->objfile->global_psymbols[psymtab->globals_offset], |
987d643c TT |
24680 | psymtab->n_global_syms, info->cu_index, |
24681 | 0); | |
1fd400ff | 24682 | write_psymbols (info->symtab, |
987d643c | 24683 | info->psyms_seen, |
af5bf4ad | 24684 | &info->objfile->static_psymbols[psymtab->statics_offset], |
987d643c TT |
24685 | psymtab->n_static_syms, info->cu_index, |
24686 | 1); | |
1fd400ff | 24687 | |
c2f134ac PA |
24688 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24689 | to_underlying (entry->per_cu.sect_off)); | |
24690 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
24691 | to_underlying (entry->type_offset_in_tu)); | |
24692 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
24693 | |
24694 | ++info->cu_index; | |
24695 | ||
24696 | return 1; | |
24697 | } | |
24698 | ||
e8f8bcb3 PA |
24699 | /* Recurse into all "included" dependencies and count their symbols as |
24700 | if they appeared in this psymtab. */ | |
24701 | ||
24702 | static void | |
24703 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
24704 | size_t &psyms_seen) | |
24705 | { | |
24706 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
24707 | if (psymtab->dependencies[i]->user != NULL) | |
24708 | recursively_count_psymbols (psymtab->dependencies[i], | |
24709 | psyms_seen); | |
24710 | ||
24711 | psyms_seen += psymtab->n_global_syms; | |
24712 | psyms_seen += psymtab->n_static_syms; | |
24713 | } | |
24714 | ||
95554aad TT |
24715 | /* Recurse into all "included" dependencies and write their symbols as |
24716 | if they appeared in this psymtab. */ | |
24717 | ||
24718 | static void | |
24719 | recursively_write_psymbols (struct objfile *objfile, | |
24720 | struct partial_symtab *psymtab, | |
24721 | struct mapped_symtab *symtab, | |
bc8f2430 | 24722 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
24723 | offset_type cu_index) |
24724 | { | |
24725 | int i; | |
24726 | ||
24727 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
24728 | if (psymtab->dependencies[i]->user != NULL) | |
24729 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
24730 | symtab, psyms_seen, cu_index); | |
24731 | ||
24732 | write_psymbols (symtab, | |
24733 | psyms_seen, | |
af5bf4ad | 24734 | &objfile->global_psymbols[psymtab->globals_offset], |
95554aad TT |
24735 | psymtab->n_global_syms, cu_index, |
24736 | 0); | |
24737 | write_psymbols (symtab, | |
24738 | psyms_seen, | |
af5bf4ad | 24739 | &objfile->static_psymbols[psymtab->statics_offset], |
95554aad TT |
24740 | psymtab->n_static_syms, cu_index, |
24741 | 1); | |
24742 | } | |
24743 | ||
9291a0cd | 24744 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 24745 | |
9291a0cd TT |
24746 | static void |
24747 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
24748 | { | |
9291a0cd TT |
24749 | if (dwarf2_per_objfile->using_index) |
24750 | error (_("Cannot use an index to create the index")); | |
24751 | ||
8b70b953 TT |
24752 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
24753 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
24754 | ||
260b681b DE |
24755 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
24756 | return; | |
24757 | ||
bc8f2430 | 24758 | struct stat st; |
4262abfb JK |
24759 | if (stat (objfile_name (objfile), &st) < 0) |
24760 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 24761 | |
bc8f2430 JK |
24762 | std::string filename (std::string (dir) + SLASH_STRING |
24763 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 24764 | |
d419f42d | 24765 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 24766 | if (!out_file) |
bc8f2430 | 24767 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 24768 | |
16b7a719 PA |
24769 | /* Order matters here; we want FILE to be closed before FILENAME is |
24770 | unlinked, because on MS-Windows one cannot delete a file that is | |
24771 | still open. (Don't call anything here that might throw until | |
24772 | file_closer is created.) */ | |
bc8f2430 | 24773 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 24774 | gdb_file_up close_out_file (out_file); |
9291a0cd | 24775 | |
bc8f2430 JK |
24776 | mapped_symtab symtab; |
24777 | data_buf cu_list; | |
987d643c | 24778 | |
0a5429f6 DE |
24779 | /* While we're scanning CU's create a table that maps a psymtab pointer |
24780 | (which is what addrmap records) to its index (which is what is recorded | |
24781 | in the index file). This will later be needed to write the address | |
24782 | table. */ | |
bc8f2430 JK |
24783 | psym_index_map cu_index_htab; |
24784 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
24785 | |
24786 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
24787 | work here. Also, the debug_types entries do not appear in |
24788 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
24789 | |
24790 | /* The psyms_seen set is potentially going to be largish (~40k | |
24791 | elements when indexing a -g3 build of GDB itself). Estimate the | |
24792 | number of elements in order to avoid too many rehashes, which | |
24793 | require rebuilding buckets and thus many trips to | |
24794 | malloc/free. */ | |
24795 | size_t psyms_count = 0; | |
24796 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24797 | { | |
24798 | struct dwarf2_per_cu_data *per_cu | |
24799 | = dwarf2_per_objfile->all_comp_units[i]; | |
24800 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
24801 | ||
24802 | if (psymtab != NULL && psymtab->user == NULL) | |
24803 | recursively_count_psymbols (psymtab, psyms_count); | |
24804 | } | |
24805 | /* Generating an index for gdb itself shows a ratio of | |
24806 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
24807 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 24808 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 24809 | { |
3e43a32a MS |
24810 | struct dwarf2_per_cu_data *per_cu |
24811 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 24812 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 24813 | |
92fac807 JK |
24814 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
24815 | It may be referenced from a local scope but in such case it does not | |
24816 | need to be present in .gdb_index. */ | |
24817 | if (psymtab == NULL) | |
24818 | continue; | |
24819 | ||
95554aad | 24820 | if (psymtab->user == NULL) |
bc8f2430 JK |
24821 | recursively_write_psymbols (objfile, psymtab, &symtab, |
24822 | psyms_seen, i); | |
9291a0cd | 24823 | |
bc8f2430 JK |
24824 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
24825 | gdb_assert (insertpair.second); | |
9291a0cd | 24826 | |
c2f134ac PA |
24827 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24828 | to_underlying (per_cu->sect_off)); | |
24829 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
24830 | } |
24831 | ||
0a5429f6 | 24832 | /* Dump the address map. */ |
bc8f2430 JK |
24833 | data_buf addr_vec; |
24834 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 24835 | |
1fd400ff | 24836 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 24837 | data_buf types_cu_list; |
1fd400ff TT |
24838 | if (dwarf2_per_objfile->signatured_types) |
24839 | { | |
bc8f2430 JK |
24840 | signatured_type_index_data sig_data (types_cu_list, |
24841 | psyms_seen); | |
1fd400ff TT |
24842 | |
24843 | sig_data.objfile = objfile; | |
bc8f2430 | 24844 | sig_data.symtab = &symtab; |
1fd400ff TT |
24845 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
24846 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
24847 | write_one_signatured_type, &sig_data); | |
24848 | } | |
24849 | ||
156942c7 DE |
24850 | /* Now that we've processed all symbols we can shrink their cu_indices |
24851 | lists. */ | |
bc8f2430 | 24852 | uniquify_cu_indices (&symtab); |
156942c7 | 24853 | |
bc8f2430 JK |
24854 | data_buf symtab_vec, constant_pool; |
24855 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 24856 | |
bc8f2430 JK |
24857 | data_buf contents; |
24858 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
24859 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
24860 | |
24861 | /* The version number. */ | |
bc8f2430 | 24862 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
24863 | |
24864 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
24865 | contents.append_data (MAYBE_SWAP (total_len)); |
24866 | total_len += cu_list.size (); | |
9291a0cd | 24867 | |
1fd400ff | 24868 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
24869 | contents.append_data (MAYBE_SWAP (total_len)); |
24870 | total_len += types_cu_list.size (); | |
1fd400ff | 24871 | |
9291a0cd | 24872 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
24873 | contents.append_data (MAYBE_SWAP (total_len)); |
24874 | total_len += addr_vec.size (); | |
9291a0cd TT |
24875 | |
24876 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
24877 | contents.append_data (MAYBE_SWAP (total_len)); |
24878 | total_len += symtab_vec.size (); | |
9291a0cd TT |
24879 | |
24880 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
24881 | contents.append_data (MAYBE_SWAP (total_len)); |
24882 | total_len += constant_pool.size (); | |
9291a0cd | 24883 | |
bc8f2430 | 24884 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 24885 | |
bc8f2430 JK |
24886 | contents.file_write (out_file); |
24887 | cu_list.file_write (out_file); | |
24888 | types_cu_list.file_write (out_file); | |
24889 | addr_vec.file_write (out_file); | |
24890 | symtab_vec.file_write (out_file); | |
24891 | constant_pool.file_write (out_file); | |
9291a0cd | 24892 | |
bef155c3 TT |
24893 | /* We want to keep the file. */ |
24894 | unlink_file.keep (); | |
9291a0cd TT |
24895 | } |
24896 | ||
90476074 TT |
24897 | /* Implementation of the `save gdb-index' command. |
24898 | ||
24899 | Note that the file format used by this command is documented in the | |
24900 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 24901 | |
9291a0cd | 24902 | static void |
8384c356 | 24903 | save_gdb_index_command (const char *arg, int from_tty) |
9291a0cd TT |
24904 | { |
24905 | struct objfile *objfile; | |
24906 | ||
24907 | if (!arg || !*arg) | |
96d19272 | 24908 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
24909 | |
24910 | ALL_OBJFILES (objfile) | |
24911 | { | |
24912 | struct stat st; | |
24913 | ||
24914 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 24915 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
24916 | continue; |
24917 | ||
9a3c8263 SM |
24918 | dwarf2_per_objfile |
24919 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
24920 | dwarf2_objfile_data_key); | |
9291a0cd TT |
24921 | if (dwarf2_per_objfile) |
24922 | { | |
9291a0cd | 24923 | |
492d29ea | 24924 | TRY |
9291a0cd TT |
24925 | { |
24926 | write_psymtabs_to_index (objfile, arg); | |
24927 | } | |
492d29ea PA |
24928 | CATCH (except, RETURN_MASK_ERROR) |
24929 | { | |
24930 | exception_fprintf (gdb_stderr, except, | |
24931 | _("Error while writing index for `%s': "), | |
24932 | objfile_name (objfile)); | |
24933 | } | |
24934 | END_CATCH | |
9291a0cd TT |
24935 | } |
24936 | } | |
dce234bc PP |
24937 | } |
24938 | ||
9291a0cd TT |
24939 | \f |
24940 | ||
b4f54984 | 24941 | int dwarf_always_disassemble; |
9eae7c52 TT |
24942 | |
24943 | static void | |
b4f54984 DE |
24944 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24945 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24946 | { |
3e43a32a MS |
24947 | fprintf_filtered (file, |
24948 | _("Whether to always disassemble " | |
24949 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24950 | value); |
24951 | } | |
24952 | ||
900e11f9 JK |
24953 | static void |
24954 | show_check_physname (struct ui_file *file, int from_tty, | |
24955 | struct cmd_list_element *c, const char *value) | |
24956 | { | |
24957 | fprintf_filtered (file, | |
24958 | _("Whether to check \"physname\" is %s.\n"), | |
24959 | value); | |
24960 | } | |
24961 | ||
6502dd73 DJ |
24962 | void |
24963 | _initialize_dwarf2_read (void) | |
24964 | { | |
96d19272 JK |
24965 | struct cmd_list_element *c; |
24966 | ||
dce234bc | 24967 | dwarf2_objfile_data_key |
c1bd65d0 | 24968 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24969 | |
b4f54984 DE |
24970 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24971 | Set DWARF specific variables.\n\ | |
24972 | Configure DWARF variables such as the cache size"), | |
24973 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24974 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24975 | ||
b4f54984 DE |
24976 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24977 | Show DWARF specific variables\n\ | |
24978 | Show DWARF variables such as the cache size"), | |
24979 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24980 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24981 | ||
24982 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24983 | &dwarf_max_cache_age, _("\ |
24984 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24985 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24986 | A higher limit means that cached compilation units will be stored\n\ |
24987 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24988 | caching, which can slow down startup."), | |
2c5b56ce | 24989 | NULL, |
b4f54984 DE |
24990 | show_dwarf_max_cache_age, |
24991 | &set_dwarf_cmdlist, | |
24992 | &show_dwarf_cmdlist); | |
d97bc12b | 24993 | |
9eae7c52 | 24994 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24995 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24996 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24997 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24998 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24999 | syntax. When disabled, expressions will be printed in a more\n\ | |
25000 | conversational style, when possible."), | |
25001 | NULL, | |
b4f54984 DE |
25002 | show_dwarf_always_disassemble, |
25003 | &set_dwarf_cmdlist, | |
25004 | &show_dwarf_cmdlist); | |
25005 | ||
25006 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
25007 | Set debugging of the DWARF reader."), _("\ | |
25008 | Show debugging of the DWARF reader."), _("\ | |
25009 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
25010 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
25011 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
25012 | NULL, |
25013 | NULL, | |
25014 | &setdebuglist, &showdebuglist); | |
25015 | ||
b4f54984 DE |
25016 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
25017 | Set debugging of the DWARF DIE reader."), _("\ | |
25018 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
25019 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
25020 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
25021 | NULL, |
25022 | NULL, | |
25023 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25024 | |
27e0867f DE |
25025 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
25026 | Set debugging of the dwarf line reader."), _("\ | |
25027 | Show debugging of the dwarf line reader."), _("\ | |
25028 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
25029 | A value of 1 (one) provides basic information.\n\ | |
25030 | A value greater than 1 provides more verbose information."), | |
25031 | NULL, | |
25032 | NULL, | |
25033 | &setdebuglist, &showdebuglist); | |
25034 | ||
900e11f9 JK |
25035 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
25036 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
25037 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
25038 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
25039 | the demangler."), | |
25040 | NULL, show_check_physname, | |
25041 | &setdebuglist, &showdebuglist); | |
25042 | ||
e615022a DE |
25043 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
25044 | no_class, &use_deprecated_index_sections, _("\ | |
25045 | Set whether to use deprecated gdb_index sections."), _("\ | |
25046 | Show whether to use deprecated gdb_index sections."), _("\ | |
25047 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
25048 | Normally they are ignored either because of a missing feature or\n\ | |
25049 | performance issue.\n\ | |
25050 | Warning: This option must be enabled before gdb reads the file."), | |
25051 | NULL, | |
25052 | NULL, | |
25053 | &setlist, &showlist); | |
25054 | ||
96d19272 | 25055 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 25056 | _("\ |
fc1a9d6e | 25057 | Save a gdb-index file.\n\ |
11570e71 | 25058 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
25059 | &save_cmdlist); |
25060 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
25061 | |
25062 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25063 | &dwarf2_locexpr_funcs); | |
25064 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25065 | &dwarf2_loclist_funcs); | |
25066 | ||
25067 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25068 | &dwarf2_block_frame_base_locexpr_funcs); | |
25069 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25070 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
25071 | |
25072 | #if GDB_SELF_TEST | |
25073 | selftests::register_test ("dw2_expand_symtabs_matching", | |
25074 | selftests::dw2_expand_symtabs_matching::run_test); | |
25075 | #endif | |
6502dd73 | 25076 | } |