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 | |
34eaf542 TT |
86 | typedef struct symbol *symbolp; |
87 | DEF_VEC_P (symbolp); | |
88 | ||
73be47f5 DE |
89 | /* When == 1, print basic high level tracing messages. |
90 | When > 1, be more verbose. | |
b4f54984 DE |
91 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
92 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 93 | |
d97bc12b | 94 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 95 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 96 | |
27e0867f DE |
97 | /* When non-zero, dump line number entries as they are read in. */ |
98 | static unsigned int dwarf_line_debug = 0; | |
99 | ||
900e11f9 JK |
100 | /* When non-zero, cross-check physname against demangler. */ |
101 | static int check_physname = 0; | |
102 | ||
481860b3 | 103 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 104 | static int use_deprecated_index_sections = 0; |
481860b3 | 105 | |
6502dd73 DJ |
106 | static const struct objfile_data *dwarf2_objfile_data_key; |
107 | ||
f1e6e072 TT |
108 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
109 | ||
110 | static int dwarf2_locexpr_index; | |
111 | static int dwarf2_loclist_index; | |
112 | static int dwarf2_locexpr_block_index; | |
113 | static int dwarf2_loclist_block_index; | |
114 | ||
73869dc2 DE |
115 | /* A descriptor for dwarf sections. |
116 | ||
117 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
118 | scanned. BUFFER, READIN are filled in later when the section is read. | |
119 | If the section contained compressed data then SIZE is updated to record | |
120 | the uncompressed size of the section. | |
121 | ||
122 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
123 | creating the concept of virtual sections contained within a real section. | |
124 | In DWP V2 the sections of the input DWO files are concatenated together | |
125 | into one section, but section offsets are kept relative to the original | |
126 | input section. | |
127 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
128 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
129 | describe the virtual section. */ | |
130 | ||
dce234bc PP |
131 | struct dwarf2_section_info |
132 | { | |
73869dc2 DE |
133 | union |
134 | { | |
e5aa3347 | 135 | /* If this is a real section, the bfd section. */ |
049412e3 | 136 | asection *section; |
73869dc2 | 137 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 138 | section. */ |
73869dc2 DE |
139 | struct dwarf2_section_info *containing_section; |
140 | } s; | |
19ac8c2e | 141 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 142 | const gdb_byte *buffer; |
73869dc2 | 143 | /* The size of the section, real or virtual. */ |
dce234bc | 144 | bfd_size_type size; |
73869dc2 DE |
145 | /* If this is a virtual section, the offset in the real section. |
146 | Only valid if is_virtual. */ | |
147 | bfd_size_type virtual_offset; | |
be391dca | 148 | /* True if we have tried to read this section. */ |
73869dc2 DE |
149 | char readin; |
150 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 151 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 152 | char is_virtual; |
dce234bc PP |
153 | }; |
154 | ||
8b70b953 TT |
155 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
156 | DEF_VEC_O (dwarf2_section_info_def); | |
157 | ||
9291a0cd TT |
158 | /* All offsets in the index are of this type. It must be |
159 | architecture-independent. */ | |
160 | typedef uint32_t offset_type; | |
161 | ||
162 | DEF_VEC_I (offset_type); | |
163 | ||
156942c7 DE |
164 | /* Ensure only legit values are used. */ |
165 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
166 | do { \ | |
167 | gdb_assert ((unsigned int) (value) <= 1); \ | |
168 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
169 | } while (0) | |
170 | ||
171 | /* Ensure only legit values are used. */ | |
172 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
173 | do { \ | |
174 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
175 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
176 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
177 | } while (0) | |
178 | ||
179 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
180 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
181 | do { \ | |
182 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
183 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
184 | } while (0) | |
185 | ||
3f563c84 PA |
186 | #if WORDS_BIGENDIAN |
187 | ||
188 | /* Convert VALUE between big- and little-endian. */ | |
189 | ||
190 | static offset_type | |
191 | byte_swap (offset_type value) | |
192 | { | |
193 | offset_type result; | |
194 | ||
195 | result = (value & 0xff) << 24; | |
196 | result |= (value & 0xff00) << 8; | |
197 | result |= (value & 0xff0000) >> 8; | |
198 | result |= (value & 0xff000000) >> 24; | |
199 | return result; | |
200 | } | |
201 | ||
202 | #define MAYBE_SWAP(V) byte_swap (V) | |
203 | ||
204 | #else | |
205 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) | |
206 | #endif /* WORDS_BIGENDIAN */ | |
207 | ||
208 | /* An index into a (C++) symbol name component in a symbol name as | |
209 | recorded in the mapped_index's symbol table. For each C++ symbol | |
210 | in the symbol table, we record one entry for the start of each | |
211 | component in the symbol in a table of name components, and then | |
212 | sort the table, in order to be able to binary search symbol names, | |
213 | ignoring leading namespaces, both completion and regular look up. | |
214 | For example, for symbol "A::B::C", we'll have an entry that points | |
215 | to "A::B::C", another that points to "B::C", and another for "C". | |
216 | Note that function symbols in GDB index have no parameter | |
217 | information, just the function/method names. You can convert a | |
218 | name_component to a "const char *" using the | |
219 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
220 | ||
221 | struct name_component | |
222 | { | |
223 | /* Offset in the symbol name where the component starts. Stored as | |
224 | a (32-bit) offset instead of a pointer to save memory and improve | |
225 | locality on 64-bit architectures. */ | |
226 | offset_type name_offset; | |
227 | ||
228 | /* The symbol's index in the symbol and constant pool tables of a | |
229 | mapped_index. */ | |
230 | offset_type idx; | |
231 | }; | |
232 | ||
9291a0cd TT |
233 | /* A description of the mapped index. The file format is described in |
234 | a comment by the code that writes the index. */ | |
235 | struct mapped_index | |
236 | { | |
559a7a62 JK |
237 | /* Index data format version. */ |
238 | int version; | |
239 | ||
9291a0cd TT |
240 | /* The total length of the buffer. */ |
241 | off_t total_size; | |
b11b1f88 | 242 | |
9291a0cd TT |
243 | /* A pointer to the address table data. */ |
244 | const gdb_byte *address_table; | |
b11b1f88 | 245 | |
9291a0cd TT |
246 | /* Size of the address table data in bytes. */ |
247 | offset_type address_table_size; | |
b11b1f88 | 248 | |
3876f04e DE |
249 | /* The symbol table, implemented as a hash table. */ |
250 | const offset_type *symbol_table; | |
b11b1f88 | 251 | |
9291a0cd | 252 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 253 | offset_type symbol_table_slots; |
b11b1f88 | 254 | |
9291a0cd TT |
255 | /* A pointer to the constant pool. */ |
256 | const char *constant_pool; | |
3f563c84 PA |
257 | |
258 | /* The name_component table (a sorted vector). See name_component's | |
259 | description above. */ | |
260 | std::vector<name_component> name_components; | |
261 | ||
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]); } | |
9291a0cd TT |
266 | }; |
267 | ||
95554aad TT |
268 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
269 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
270 | ||
52059ffd TT |
271 | struct tu_stats |
272 | { | |
273 | int nr_uniq_abbrev_tables; | |
274 | int nr_symtabs; | |
275 | int nr_symtab_sharers; | |
276 | int nr_stmt_less_type_units; | |
277 | int nr_all_type_units_reallocs; | |
278 | }; | |
279 | ||
9cdd5dbd DE |
280 | /* Collection of data recorded per objfile. |
281 | This hangs off of dwarf2_objfile_data_key. */ | |
282 | ||
6502dd73 DJ |
283 | struct dwarf2_per_objfile |
284 | { | |
330cdd98 PA |
285 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
286 | dwarf2 section names, or is NULL if the standard ELF names are | |
287 | used. */ | |
288 | dwarf2_per_objfile (struct objfile *objfile, | |
289 | const dwarf2_debug_sections *names); | |
ae038cb0 | 290 | |
330cdd98 PA |
291 | ~dwarf2_per_objfile (); |
292 | ||
d6541620 | 293 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
294 | |
295 | /* Free all cached compilation units. */ | |
296 | void free_cached_comp_units (); | |
297 | private: | |
298 | /* This function is mapped across the sections and remembers the | |
299 | offset and size of each of the debugging sections we are | |
300 | interested in. */ | |
301 | void locate_sections (bfd *abfd, asection *sectp, | |
302 | const dwarf2_debug_sections &names); | |
303 | ||
304 | public: | |
305 | dwarf2_section_info info {}; | |
306 | dwarf2_section_info abbrev {}; | |
307 | dwarf2_section_info line {}; | |
308 | dwarf2_section_info loc {}; | |
309 | dwarf2_section_info loclists {}; | |
310 | dwarf2_section_info macinfo {}; | |
311 | dwarf2_section_info macro {}; | |
312 | dwarf2_section_info str {}; | |
313 | dwarf2_section_info line_str {}; | |
314 | dwarf2_section_info ranges {}; | |
315 | dwarf2_section_info rnglists {}; | |
316 | dwarf2_section_info addr {}; | |
317 | dwarf2_section_info frame {}; | |
318 | dwarf2_section_info eh_frame {}; | |
319 | dwarf2_section_info gdb_index {}; | |
320 | ||
321 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 322 | |
be391dca | 323 | /* Back link. */ |
330cdd98 | 324 | struct objfile *objfile = NULL; |
be391dca | 325 | |
d467dd73 | 326 | /* Table of all the compilation units. This is used to locate |
10b3939b | 327 | the target compilation unit of a particular reference. */ |
330cdd98 | 328 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
329 | |
330 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 331 | int n_comp_units = 0; |
ae038cb0 | 332 | |
1fd400ff | 333 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 334 | int n_type_units = 0; |
1fd400ff | 335 | |
6aa5f3a6 DE |
336 | /* The number of elements allocated in all_type_units. |
337 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 338 | int n_allocated_type_units = 0; |
6aa5f3a6 | 339 | |
a2ce51a0 DE |
340 | /* The .debug_types-related CUs (TUs). |
341 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 342 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 343 | |
f4dc4d17 DE |
344 | /* Table of struct type_unit_group objects. |
345 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 346 | htab_t type_unit_groups {}; |
72dca2f5 | 347 | |
348e048f DE |
348 | /* A table mapping .debug_types signatures to its signatured_type entry. |
349 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 350 | htab_t signatured_types {}; |
348e048f | 351 | |
f4dc4d17 DE |
352 | /* Type unit statistics, to see how well the scaling improvements |
353 | are doing. */ | |
330cdd98 | 354 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
355 | |
356 | /* A chain of compilation units that are currently read in, so that | |
357 | they can be freed later. */ | |
330cdd98 | 358 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 359 | |
3019eac3 DE |
360 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
361 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 362 | htab_t dwo_files {}; |
3019eac3 | 363 | |
330cdd98 PA |
364 | /* True if we've checked for whether there is a DWP file. */ |
365 | bool dwp_checked = false; | |
80626a55 DE |
366 | |
367 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 368 | struct dwp_file *dwp_file = NULL; |
80626a55 | 369 | |
36586728 TT |
370 | /* The shared '.dwz' file, if one exists. This is used when the |
371 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 372 | struct dwz_file *dwz_file = NULL; |
36586728 | 373 | |
330cdd98 | 374 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 375 | VMA of 0. */ |
330cdd98 | 376 | bool has_section_at_zero = false; |
9291a0cd | 377 | |
ae2de4f8 DE |
378 | /* True if we are using the mapped index, |
379 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 380 | bool using_index = false; |
9291a0cd | 381 | |
ae2de4f8 | 382 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 383 | mapped_index *index_table = NULL; |
98bfdba5 | 384 | |
7b9f3c50 | 385 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
386 | TUs typically share line table entries with a CU, so we maintain a |
387 | separate table of all line table entries to support the sharing. | |
388 | Note that while there can be way more TUs than CUs, we've already | |
389 | sorted all the TUs into "type unit groups", grouped by their | |
390 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
391 | CU and its associated TU group if there is one. */ | |
330cdd98 | 392 | htab_t quick_file_names_table {}; |
7b9f3c50 | 393 | |
98bfdba5 PA |
394 | /* Set during partial symbol reading, to prevent queueing of full |
395 | symbols. */ | |
330cdd98 | 396 | bool reading_partial_symbols = false; |
673bfd45 | 397 | |
dee91e82 | 398 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 399 | This is NULL if not allocated yet. |
02142a6c | 400 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 401 | htab_t die_type_hash {}; |
95554aad TT |
402 | |
403 | /* The CUs we recently read. */ | |
330cdd98 | 404 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
405 | |
406 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 407 | htab_t line_header_hash {}; |
bbf2f4df PA |
408 | |
409 | /* Table containing all filenames. This is an optional because the | |
410 | table is lazily constructed on first access. */ | |
411 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
412 | }; |
413 | ||
414 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 415 | |
251d32d9 | 416 | /* Default names of the debugging sections. */ |
c906108c | 417 | |
233a11ab CS |
418 | /* Note that if the debugging section has been compressed, it might |
419 | have a name like .zdebug_info. */ | |
420 | ||
9cdd5dbd DE |
421 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
422 | { | |
251d32d9 TG |
423 | { ".debug_info", ".zdebug_info" }, |
424 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
425 | { ".debug_line", ".zdebug_line" }, | |
426 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 427 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 428 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 429 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 430 | { ".debug_str", ".zdebug_str" }, |
43988095 | 431 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 432 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 433 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 434 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 435 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
436 | { ".debug_frame", ".zdebug_frame" }, |
437 | { ".eh_frame", NULL }, | |
24d3216f TT |
438 | { ".gdb_index", ".zgdb_index" }, |
439 | 23 | |
251d32d9 | 440 | }; |
c906108c | 441 | |
80626a55 | 442 | /* List of DWO/DWP sections. */ |
3019eac3 | 443 | |
80626a55 | 444 | static const struct dwop_section_names |
3019eac3 DE |
445 | { |
446 | struct dwarf2_section_names abbrev_dwo; | |
447 | struct dwarf2_section_names info_dwo; | |
448 | struct dwarf2_section_names line_dwo; | |
449 | struct dwarf2_section_names loc_dwo; | |
43988095 | 450 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
451 | struct dwarf2_section_names macinfo_dwo; |
452 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
453 | struct dwarf2_section_names str_dwo; |
454 | struct dwarf2_section_names str_offsets_dwo; | |
455 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
456 | struct dwarf2_section_names cu_index; |
457 | struct dwarf2_section_names tu_index; | |
3019eac3 | 458 | } |
80626a55 | 459 | dwop_section_names = |
3019eac3 DE |
460 | { |
461 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
462 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
463 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
464 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 465 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
466 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
467 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
468 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
469 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
470 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
471 | { ".debug_cu_index", ".zdebug_cu_index" }, |
472 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
473 | }; |
474 | ||
c906108c SS |
475 | /* local data types */ |
476 | ||
107d2387 AC |
477 | /* The data in a compilation unit header, after target2host |
478 | translation, looks like this. */ | |
c906108c | 479 | struct comp_unit_head |
a738430d | 480 | { |
c764a876 | 481 | unsigned int length; |
a738430d | 482 | short version; |
a738430d MK |
483 | unsigned char addr_size; |
484 | unsigned char signed_addr_p; | |
9c541725 | 485 | sect_offset abbrev_sect_off; |
57349743 | 486 | |
a738430d MK |
487 | /* Size of file offsets; either 4 or 8. */ |
488 | unsigned int offset_size; | |
57349743 | 489 | |
a738430d MK |
490 | /* Size of the length field; either 4 or 12. */ |
491 | unsigned int initial_length_size; | |
57349743 | 492 | |
43988095 JK |
493 | enum dwarf_unit_type unit_type; |
494 | ||
a738430d MK |
495 | /* Offset to the first byte of this compilation unit header in the |
496 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 497 | sect_offset sect_off; |
57349743 | 498 | |
d00adf39 DE |
499 | /* Offset to first die in this cu from the start of the cu. |
500 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 501 | cu_offset first_die_cu_offset; |
43988095 JK |
502 | |
503 | /* 64-bit signature of this type unit - it is valid only for | |
504 | UNIT_TYPE DW_UT_type. */ | |
505 | ULONGEST signature; | |
506 | ||
507 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 508 | cu_offset type_cu_offset_in_tu; |
a738430d | 509 | }; |
c906108c | 510 | |
3da10d80 KS |
511 | /* Type used for delaying computation of method physnames. |
512 | See comments for compute_delayed_physnames. */ | |
513 | struct delayed_method_info | |
514 | { | |
515 | /* The type to which the method is attached, i.e., its parent class. */ | |
516 | struct type *type; | |
517 | ||
518 | /* The index of the method in the type's function fieldlists. */ | |
519 | int fnfield_index; | |
520 | ||
521 | /* The index of the method in the fieldlist. */ | |
522 | int index; | |
523 | ||
524 | /* The name of the DIE. */ | |
525 | const char *name; | |
526 | ||
527 | /* The DIE associated with this method. */ | |
528 | struct die_info *die; | |
529 | }; | |
530 | ||
531 | typedef struct delayed_method_info delayed_method_info; | |
532 | DEF_VEC_O (delayed_method_info); | |
533 | ||
e7c27a73 DJ |
534 | /* Internal state when decoding a particular compilation unit. */ |
535 | struct dwarf2_cu | |
536 | { | |
537 | /* The objfile containing this compilation unit. */ | |
538 | struct objfile *objfile; | |
539 | ||
d00adf39 | 540 | /* The header of the compilation unit. */ |
e7c27a73 | 541 | struct comp_unit_head header; |
e142c38c | 542 | |
d00adf39 DE |
543 | /* Base address of this compilation unit. */ |
544 | CORE_ADDR base_address; | |
545 | ||
546 | /* Non-zero if base_address has been set. */ | |
547 | int base_known; | |
548 | ||
e142c38c DJ |
549 | /* The language we are debugging. */ |
550 | enum language language; | |
551 | const struct language_defn *language_defn; | |
552 | ||
b0f35d58 DL |
553 | const char *producer; |
554 | ||
e142c38c DJ |
555 | /* The generic symbol table building routines have separate lists for |
556 | file scope symbols and all all other scopes (local scopes). So | |
557 | we need to select the right one to pass to add_symbol_to_list(). | |
558 | We do it by keeping a pointer to the correct list in list_in_scope. | |
559 | ||
560 | FIXME: The original dwarf code just treated the file scope as the | |
561 | first local scope, and all other local scopes as nested local | |
562 | scopes, and worked fine. Check to see if we really need to | |
563 | distinguish these in buildsym.c. */ | |
564 | struct pending **list_in_scope; | |
565 | ||
433df2d4 DE |
566 | /* The abbrev table for this CU. |
567 | Normally this points to the abbrev table in the objfile. | |
568 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
569 | struct abbrev_table *abbrev_table; | |
72bf9492 | 570 | |
b64f50a1 JK |
571 | /* Hash table holding all the loaded partial DIEs |
572 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
573 | htab_t partial_dies; |
574 | ||
575 | /* Storage for things with the same lifetime as this read-in compilation | |
576 | unit, including partial DIEs. */ | |
577 | struct obstack comp_unit_obstack; | |
578 | ||
ae038cb0 DJ |
579 | /* When multiple dwarf2_cu structures are living in memory, this field |
580 | chains them all together, so that they can be released efficiently. | |
581 | We will probably also want a generation counter so that most-recently-used | |
582 | compilation units are cached... */ | |
583 | struct dwarf2_per_cu_data *read_in_chain; | |
584 | ||
69d751e3 | 585 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
586 | struct dwarf2_per_cu_data *per_cu; |
587 | ||
588 | /* How many compilation units ago was this CU last referenced? */ | |
589 | int last_used; | |
590 | ||
b64f50a1 JK |
591 | /* A hash table of DIE cu_offset for following references with |
592 | die_info->offset.sect_off as hash. */ | |
51545339 | 593 | htab_t die_hash; |
10b3939b DJ |
594 | |
595 | /* Full DIEs if read in. */ | |
596 | struct die_info *dies; | |
597 | ||
598 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
599 | units referenced by this one. Only set during full symbol processing; | |
600 | partial symbol tables do not have dependencies. */ | |
601 | htab_t dependencies; | |
602 | ||
cb1df416 DJ |
603 | /* Header data from the line table, during full symbol processing. */ |
604 | struct line_header *line_header; | |
4c8aa72d PA |
605 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
606 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
607 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
608 | to the line header as long as this DIE is being processed. See | |
609 | process_die_scope. */ | |
610 | die_info *line_header_die_owner; | |
cb1df416 | 611 | |
3da10d80 KS |
612 | /* A list of methods which need to have physnames computed |
613 | after all type information has been read. */ | |
614 | VEC (delayed_method_info) *method_list; | |
615 | ||
96408a79 SA |
616 | /* To be copied to symtab->call_site_htab. */ |
617 | htab_t call_site_htab; | |
618 | ||
034e5797 DE |
619 | /* Non-NULL if this CU came from a DWO file. |
620 | There is an invariant here that is important to remember: | |
621 | Except for attributes copied from the top level DIE in the "main" | |
622 | (or "stub") file in preparation for reading the DWO file | |
623 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
624 | Either there isn't a DWO file (in which case this is NULL and the point | |
625 | is moot), or there is and either we're not going to read it (in which | |
626 | case this is NULL) or there is and we are reading it (in which case this | |
627 | is non-NULL). */ | |
3019eac3 DE |
628 | struct dwo_unit *dwo_unit; |
629 | ||
630 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
631 | (zero is a valid value though). | |
1dbab08b | 632 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
633 | ULONGEST addr_base; |
634 | ||
2e3cf129 DE |
635 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
636 | (zero is a valid value though). | |
1dbab08b | 637 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 638 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
639 | be used without needing to know whether DWO files are in use or not. |
640 | N.B. This does not apply to DW_AT_ranges appearing in | |
641 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
642 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
643 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
644 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
645 | ULONGEST ranges_base; |
646 | ||
ae038cb0 DJ |
647 | /* Mark used when releasing cached dies. */ |
648 | unsigned int mark : 1; | |
649 | ||
8be455d7 JK |
650 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
651 | This test is imperfect as there may exist optimized debug code not using | |
652 | any location list and still facing inlining issues if handled as | |
653 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 654 | unsigned int has_loclist : 1; |
ba919b58 | 655 | |
1b80a9fa JK |
656 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
657 | if all the producer_is_* fields are valid. This information is cached | |
658 | because profiling CU expansion showed excessive time spent in | |
659 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
660 | unsigned int checked_producer : 1; |
661 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 662 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 663 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
664 | |
665 | /* When set, the file that we're processing is known to have | |
666 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
667 | this information, but later versions do. */ | |
668 | ||
669 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
670 | }; |
671 | ||
10b3939b DJ |
672 | /* Persistent data held for a compilation unit, even when not |
673 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 674 | read_symtab_private field of the psymtab. */ |
10b3939b | 675 | |
ae038cb0 DJ |
676 | struct dwarf2_per_cu_data |
677 | { | |
36586728 | 678 | /* The start offset and length of this compilation unit. |
45452591 | 679 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
680 | initial_length_size. |
681 | If the DIE refers to a DWO file, this is always of the original die, | |
682 | not the DWO file. */ | |
9c541725 | 683 | sect_offset sect_off; |
36586728 | 684 | unsigned int length; |
ae038cb0 | 685 | |
43988095 JK |
686 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
687 | short dwarf_version; | |
688 | ||
ae038cb0 DJ |
689 | /* Flag indicating this compilation unit will be read in before |
690 | any of the current compilation units are processed. */ | |
c764a876 | 691 | unsigned int queued : 1; |
ae038cb0 | 692 | |
0d99eb77 DE |
693 | /* This flag will be set when reading partial DIEs if we need to load |
694 | absolutely all DIEs for this compilation unit, instead of just the ones | |
695 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
696 | hash table and don't find it. */ |
697 | unsigned int load_all_dies : 1; | |
698 | ||
0186c6a7 DE |
699 | /* Non-zero if this CU is from .debug_types. |
700 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
701 | this is non-zero. */ | |
3019eac3 DE |
702 | unsigned int is_debug_types : 1; |
703 | ||
36586728 TT |
704 | /* Non-zero if this CU is from the .dwz file. */ |
705 | unsigned int is_dwz : 1; | |
706 | ||
a2ce51a0 DE |
707 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
708 | This flag is only valid if is_debug_types is true. | |
709 | We can't read a CU directly from a DWO file: There are required | |
710 | attributes in the stub. */ | |
711 | unsigned int reading_dwo_directly : 1; | |
712 | ||
7ee85ab1 DE |
713 | /* Non-zero if the TU has been read. |
714 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
715 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
716 | fetching them from random other DWOs (due to comdat folding). | |
717 | If the TU has already been read, the optimization is unnecessary | |
718 | (and unwise - we don't want to change where gdb thinks the TU lives | |
719 | "midflight"). | |
720 | This flag is only valid if is_debug_types is true. */ | |
721 | unsigned int tu_read : 1; | |
722 | ||
3019eac3 DE |
723 | /* The section this CU/TU lives in. |
724 | If the DIE refers to a DWO file, this is always the original die, | |
725 | not the DWO file. */ | |
8a0459fd | 726 | struct dwarf2_section_info *section; |
348e048f | 727 | |
17ea53c3 | 728 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
729 | of the CU cache it gets reset to NULL again. This is left as NULL for |
730 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 731 | struct dwarf2_cu *cu; |
1c379e20 | 732 | |
9cdd5dbd DE |
733 | /* The corresponding objfile. |
734 | Normally we can get the objfile from dwarf2_per_objfile. | |
735 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
736 | struct objfile *objfile; |
737 | ||
fffbe6a8 YQ |
738 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
739 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
740 | union |
741 | { | |
742 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 743 | or NULL for unread partial units. */ |
9291a0cd TT |
744 | struct partial_symtab *psymtab; |
745 | ||
746 | /* Data needed by the "quick" functions. */ | |
747 | struct dwarf2_per_cu_quick_data *quick; | |
748 | } v; | |
95554aad | 749 | |
796a7ff8 DE |
750 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
751 | while reading psymtabs, used to compute the psymtab dependencies, | |
752 | and then cleared. Then it is filled in again while reading full | |
753 | symbols, and only deleted when the objfile is destroyed. | |
754 | ||
755 | This is also used to work around a difference between the way gold | |
756 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
757 | is a gold bug. For symbols coming from TUs, gold records in the index | |
758 | the CU that includes the TU instead of the TU itself. This breaks | |
759 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
760 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
761 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
762 | we need to look in TU Z to find X. Fortunately, this is akin to | |
763 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
764 | .gdb_index version <=7 this also records the TUs that the CU referred | |
765 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
766 | indices so we only pay a price for gold generated indices. |
767 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 768 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
769 | }; |
770 | ||
348e048f DE |
771 | /* Entry in the signatured_types hash table. */ |
772 | ||
773 | struct signatured_type | |
774 | { | |
42e7ad6c | 775 | /* The "per_cu" object of this type. |
ac9ec31b | 776 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
777 | N.B.: This is the first member so that it's easy to convert pointers |
778 | between them. */ | |
779 | struct dwarf2_per_cu_data per_cu; | |
780 | ||
3019eac3 | 781 | /* The type's signature. */ |
348e048f DE |
782 | ULONGEST signature; |
783 | ||
3019eac3 | 784 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
785 | If this TU is a DWO stub and the definition lives in a DWO file |
786 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
787 | cu_offset type_offset_in_tu; |
788 | ||
789 | /* Offset in the section of the type's DIE. | |
790 | If the definition lives in a DWO file, this is the offset in the | |
791 | .debug_types.dwo section. | |
792 | The value is zero until the actual value is known. | |
793 | Zero is otherwise not a valid section offset. */ | |
794 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
795 | |
796 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
797 | can share them. This points to the containing symtab. */ | |
798 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
799 | |
800 | /* The type. | |
801 | The first time we encounter this type we fully read it in and install it | |
802 | in the symbol tables. Subsequent times we only need the type. */ | |
803 | struct type *type; | |
a2ce51a0 DE |
804 | |
805 | /* Containing DWO unit. | |
806 | This field is valid iff per_cu.reading_dwo_directly. */ | |
807 | struct dwo_unit *dwo_unit; | |
348e048f DE |
808 | }; |
809 | ||
0186c6a7 DE |
810 | typedef struct signatured_type *sig_type_ptr; |
811 | DEF_VEC_P (sig_type_ptr); | |
812 | ||
094b34ac DE |
813 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
814 | This includes type_unit_group and quick_file_names. */ | |
815 | ||
816 | struct stmt_list_hash | |
817 | { | |
818 | /* The DWO unit this table is from or NULL if there is none. */ | |
819 | struct dwo_unit *dwo_unit; | |
820 | ||
821 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 822 | sect_offset line_sect_off; |
094b34ac DE |
823 | }; |
824 | ||
f4dc4d17 DE |
825 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
826 | an object of this type. */ | |
827 | ||
828 | struct type_unit_group | |
829 | { | |
0186c6a7 | 830 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
831 | To simplify things we create an artificial CU that "includes" all the |
832 | type units using this stmt_list so that the rest of the code still has | |
833 | a "per_cu" handle on the symtab. | |
834 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 835 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
836 | struct dwarf2_per_cu_data per_cu; |
837 | ||
0186c6a7 DE |
838 | /* The TUs that share this DW_AT_stmt_list entry. |
839 | This is added to while parsing type units to build partial symtabs, | |
840 | and is deleted afterwards and not used again. */ | |
841 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 842 | |
43f3e411 | 843 | /* The compunit symtab. |
094b34ac | 844 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
845 | so we create an essentially anonymous symtab as the compunit symtab. */ |
846 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 847 | |
094b34ac DE |
848 | /* The data used to construct the hash key. */ |
849 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
850 | |
851 | /* The number of symtabs from the line header. | |
852 | The value here must match line_header.num_file_names. */ | |
853 | unsigned int num_symtabs; | |
854 | ||
855 | /* The symbol tables for this TU (obtained from the files listed in | |
856 | DW_AT_stmt_list). | |
857 | WARNING: The order of entries here must match the order of entries | |
858 | in the line header. After the first TU using this type_unit_group, the | |
859 | line header for the subsequent TUs is recreated from this. This is done | |
860 | because we need to use the same symtabs for each TU using the same | |
861 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
862 | there's no guarantee the line header doesn't have duplicate entries. */ | |
863 | struct symtab **symtabs; | |
864 | }; | |
865 | ||
73869dc2 | 866 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
867 | |
868 | struct dwo_sections | |
869 | { | |
870 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
871 | struct dwarf2_section_info line; |
872 | struct dwarf2_section_info loc; | |
43988095 | 873 | struct dwarf2_section_info loclists; |
09262596 DE |
874 | struct dwarf2_section_info macinfo; |
875 | struct dwarf2_section_info macro; | |
3019eac3 DE |
876 | struct dwarf2_section_info str; |
877 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
878 | /* In the case of a virtual DWO file, these two are unused. */ |
879 | struct dwarf2_section_info info; | |
3019eac3 DE |
880 | VEC (dwarf2_section_info_def) *types; |
881 | }; | |
882 | ||
c88ee1f0 | 883 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
884 | |
885 | struct dwo_unit | |
886 | { | |
887 | /* Backlink to the containing struct dwo_file. */ | |
888 | struct dwo_file *dwo_file; | |
889 | ||
890 | /* The "id" that distinguishes this CU/TU. | |
891 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
892 | Since signatures came first, we stick with it for consistency. */ | |
893 | ULONGEST signature; | |
894 | ||
895 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 896 | struct dwarf2_section_info *section; |
3019eac3 | 897 | |
9c541725 PA |
898 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
899 | sect_offset sect_off; | |
3019eac3 DE |
900 | unsigned int length; |
901 | ||
902 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
903 | cu_offset type_offset_in_tu; | |
904 | }; | |
905 | ||
73869dc2 DE |
906 | /* include/dwarf2.h defines the DWP section codes. |
907 | It defines a max value but it doesn't define a min value, which we | |
908 | use for error checking, so provide one. */ | |
909 | ||
910 | enum dwp_v2_section_ids | |
911 | { | |
912 | DW_SECT_MIN = 1 | |
913 | }; | |
914 | ||
80626a55 | 915 | /* Data for one DWO file. |
57d63ce2 DE |
916 | |
917 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
918 | appears in a DWP file). DWP files don't really have DWO files per se - | |
919 | comdat folding of types "loses" the DWO file they came from, and from | |
920 | a high level view DWP files appear to contain a mass of random types. | |
921 | However, to maintain consistency with the non-DWP case we pretend DWP | |
922 | files contain virtual DWO files, and we assign each TU with one virtual | |
923 | DWO file (generally based on the line and abbrev section offsets - | |
924 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
925 | |
926 | struct dwo_file | |
927 | { | |
0ac5b59e | 928 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
929 | For virtual DWO files the name is constructed from the section offsets |
930 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
931 | from related CU+TUs. */ | |
0ac5b59e DE |
932 | const char *dwo_name; |
933 | ||
934 | /* The DW_AT_comp_dir attribute. */ | |
935 | const char *comp_dir; | |
3019eac3 | 936 | |
80626a55 DE |
937 | /* The bfd, when the file is open. Otherwise this is NULL. |
938 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
939 | bfd *dbfd; | |
3019eac3 | 940 | |
73869dc2 DE |
941 | /* The sections that make up this DWO file. |
942 | Remember that for virtual DWO files in DWP V2, these are virtual | |
943 | sections (for lack of a better name). */ | |
3019eac3 DE |
944 | struct dwo_sections sections; |
945 | ||
33c5cd75 DB |
946 | /* The CUs in the file. |
947 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
948 | an extension to handle LLVM's Link Time Optimization output (where | |
949 | multiple source files may be compiled into a single object/dwo pair). */ | |
950 | htab_t cus; | |
3019eac3 DE |
951 | |
952 | /* Table of TUs in the file. | |
953 | Each element is a struct dwo_unit. */ | |
954 | htab_t tus; | |
955 | }; | |
956 | ||
80626a55 DE |
957 | /* These sections are what may appear in a DWP file. */ |
958 | ||
959 | struct dwp_sections | |
960 | { | |
73869dc2 | 961 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
962 | struct dwarf2_section_info str; |
963 | struct dwarf2_section_info cu_index; | |
964 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
965 | |
966 | /* These are only used by DWP version 2 files. | |
967 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
968 | sections are referenced by section number, and are not recorded here. | |
969 | In DWP version 2 there is at most one copy of all these sections, each | |
970 | section being (effectively) comprised of the concatenation of all of the | |
971 | individual sections that exist in the version 1 format. | |
972 | To keep the code simple we treat each of these concatenated pieces as a | |
973 | section itself (a virtual section?). */ | |
974 | struct dwarf2_section_info abbrev; | |
975 | struct dwarf2_section_info info; | |
976 | struct dwarf2_section_info line; | |
977 | struct dwarf2_section_info loc; | |
978 | struct dwarf2_section_info macinfo; | |
979 | struct dwarf2_section_info macro; | |
980 | struct dwarf2_section_info str_offsets; | |
981 | struct dwarf2_section_info types; | |
80626a55 DE |
982 | }; |
983 | ||
73869dc2 DE |
984 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
985 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 986 | |
73869dc2 | 987 | struct virtual_v1_dwo_sections |
80626a55 DE |
988 | { |
989 | struct dwarf2_section_info abbrev; | |
990 | struct dwarf2_section_info line; | |
991 | struct dwarf2_section_info loc; | |
992 | struct dwarf2_section_info macinfo; | |
993 | struct dwarf2_section_info macro; | |
994 | struct dwarf2_section_info str_offsets; | |
995 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 996 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
997 | struct dwarf2_section_info info_or_types; |
998 | }; | |
999 | ||
73869dc2 DE |
1000 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
1001 | In version 2, the sections of the DWO files are concatenated together | |
1002 | and stored in one section of that name. Thus each ELF section contains | |
1003 | several "virtual" sections. */ | |
1004 | ||
1005 | struct virtual_v2_dwo_sections | |
1006 | { | |
1007 | bfd_size_type abbrev_offset; | |
1008 | bfd_size_type abbrev_size; | |
1009 | ||
1010 | bfd_size_type line_offset; | |
1011 | bfd_size_type line_size; | |
1012 | ||
1013 | bfd_size_type loc_offset; | |
1014 | bfd_size_type loc_size; | |
1015 | ||
1016 | bfd_size_type macinfo_offset; | |
1017 | bfd_size_type macinfo_size; | |
1018 | ||
1019 | bfd_size_type macro_offset; | |
1020 | bfd_size_type macro_size; | |
1021 | ||
1022 | bfd_size_type str_offsets_offset; | |
1023 | bfd_size_type str_offsets_size; | |
1024 | ||
1025 | /* Each DWP hash table entry records one CU or one TU. | |
1026 | That is recorded here, and copied to dwo_unit.section. */ | |
1027 | bfd_size_type info_or_types_offset; | |
1028 | bfd_size_type info_or_types_size; | |
1029 | }; | |
1030 | ||
80626a55 DE |
1031 | /* Contents of DWP hash tables. */ |
1032 | ||
1033 | struct dwp_hash_table | |
1034 | { | |
73869dc2 | 1035 | uint32_t version, nr_columns; |
80626a55 | 1036 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
1037 | const gdb_byte *hash_table, *unit_table; |
1038 | union | |
1039 | { | |
1040 | struct | |
1041 | { | |
1042 | const gdb_byte *indices; | |
1043 | } v1; | |
1044 | struct | |
1045 | { | |
1046 | /* This is indexed by column number and gives the id of the section | |
1047 | in that column. */ | |
1048 | #define MAX_NR_V2_DWO_SECTIONS \ | |
1049 | (1 /* .debug_info or .debug_types */ \ | |
1050 | + 1 /* .debug_abbrev */ \ | |
1051 | + 1 /* .debug_line */ \ | |
1052 | + 1 /* .debug_loc */ \ | |
1053 | + 1 /* .debug_str_offsets */ \ | |
1054 | + 1 /* .debug_macro or .debug_macinfo */) | |
1055 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
1056 | const gdb_byte *offsets; | |
1057 | const gdb_byte *sizes; | |
1058 | } v2; | |
1059 | } section_pool; | |
80626a55 DE |
1060 | }; |
1061 | ||
1062 | /* Data for one DWP file. */ | |
1063 | ||
1064 | struct dwp_file | |
1065 | { | |
1066 | /* Name of the file. */ | |
1067 | const char *name; | |
1068 | ||
73869dc2 DE |
1069 | /* File format version. */ |
1070 | int version; | |
1071 | ||
93417882 | 1072 | /* The bfd. */ |
80626a55 DE |
1073 | bfd *dbfd; |
1074 | ||
1075 | /* Section info for this file. */ | |
1076 | struct dwp_sections sections; | |
1077 | ||
57d63ce2 | 1078 | /* Table of CUs in the file. */ |
80626a55 DE |
1079 | const struct dwp_hash_table *cus; |
1080 | ||
1081 | /* Table of TUs in the file. */ | |
1082 | const struct dwp_hash_table *tus; | |
1083 | ||
19ac8c2e DE |
1084 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1085 | htab_t loaded_cus; | |
1086 | htab_t loaded_tus; | |
80626a55 | 1087 | |
73869dc2 DE |
1088 | /* Table to map ELF section numbers to their sections. |
1089 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1090 | unsigned int num_sections; |
1091 | asection **elf_sections; | |
1092 | }; | |
1093 | ||
36586728 TT |
1094 | /* This represents a '.dwz' file. */ |
1095 | ||
1096 | struct dwz_file | |
1097 | { | |
1098 | /* A dwz file can only contain a few sections. */ | |
1099 | struct dwarf2_section_info abbrev; | |
1100 | struct dwarf2_section_info info; | |
1101 | struct dwarf2_section_info str; | |
1102 | struct dwarf2_section_info line; | |
1103 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1104 | struct dwarf2_section_info gdb_index; |
36586728 TT |
1105 | |
1106 | /* The dwz's BFD. */ | |
1107 | bfd *dwz_bfd; | |
1108 | }; | |
1109 | ||
0963b4bd MS |
1110 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1111 | al. which are used for both .debug_info and .debug_types dies. | |
1112 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1113 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1114 | |
1115 | struct die_reader_specs | |
1116 | { | |
a32a8923 | 1117 | /* The bfd of die_section. */ |
93311388 DE |
1118 | bfd* abfd; |
1119 | ||
1120 | /* The CU of the DIE we are parsing. */ | |
1121 | struct dwarf2_cu *cu; | |
1122 | ||
80626a55 | 1123 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1124 | struct dwo_file *dwo_file; |
1125 | ||
dee91e82 | 1126 | /* The section the die comes from. |
3019eac3 | 1127 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1128 | struct dwarf2_section_info *die_section; |
1129 | ||
1130 | /* die_section->buffer. */ | |
d521ce57 | 1131 | const gdb_byte *buffer; |
f664829e DE |
1132 | |
1133 | /* The end of the buffer. */ | |
1134 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1135 | |
1136 | /* The value of the DW_AT_comp_dir attribute. */ | |
1137 | const char *comp_dir; | |
93311388 DE |
1138 | }; |
1139 | ||
fd820528 | 1140 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1141 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1142 | const gdb_byte *info_ptr, |
dee91e82 DE |
1143 | struct die_info *comp_unit_die, |
1144 | int has_children, | |
1145 | void *data); | |
1146 | ||
ecfb656c PA |
1147 | /* A 1-based directory index. This is a strong typedef to prevent |
1148 | accidentally using a directory index as a 0-based index into an | |
1149 | array/vector. */ | |
1150 | enum class dir_index : unsigned int {}; | |
1151 | ||
1152 | /* Likewise, a 1-based file name index. */ | |
1153 | enum class file_name_index : unsigned int {}; | |
1154 | ||
52059ffd TT |
1155 | struct file_entry |
1156 | { | |
fff8551c PA |
1157 | file_entry () = default; |
1158 | ||
ecfb656c | 1159 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1160 | unsigned int mod_time_, unsigned int length_) |
1161 | : name (name_), | |
ecfb656c | 1162 | d_index (d_index_), |
fff8551c PA |
1163 | mod_time (mod_time_), |
1164 | length (length_) | |
1165 | {} | |
1166 | ||
ecfb656c PA |
1167 | /* Return the include directory at D_INDEX stored in LH. Returns |
1168 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1169 | const char *include_dir (const line_header *lh) const; |
1170 | ||
fff8551c PA |
1171 | /* The file name. Note this is an observing pointer. The memory is |
1172 | owned by debug_line_buffer. */ | |
1173 | const char *name {}; | |
1174 | ||
8c43009f | 1175 | /* The directory index (1-based). */ |
ecfb656c | 1176 | dir_index d_index {}; |
fff8551c PA |
1177 | |
1178 | unsigned int mod_time {}; | |
1179 | ||
1180 | unsigned int length {}; | |
1181 | ||
1182 | /* True if referenced by the Line Number Program. */ | |
1183 | bool included_p {}; | |
1184 | ||
83769d0b | 1185 | /* The associated symbol table, if any. */ |
fff8551c | 1186 | struct symtab *symtab {}; |
52059ffd TT |
1187 | }; |
1188 | ||
debd256d JB |
1189 | /* The line number information for a compilation unit (found in the |
1190 | .debug_line section) begins with a "statement program header", | |
1191 | which contains the following information. */ | |
1192 | struct line_header | |
1193 | { | |
fff8551c PA |
1194 | line_header () |
1195 | : offset_in_dwz {} | |
1196 | {} | |
1197 | ||
1198 | /* Add an entry to the include directory table. */ | |
1199 | void add_include_dir (const char *include_dir); | |
1200 | ||
1201 | /* Add an entry to the file name table. */ | |
ecfb656c | 1202 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1203 | unsigned int mod_time, unsigned int length); |
1204 | ||
ecfb656c | 1205 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1206 | is out of bounds. */ |
ecfb656c | 1207 | const char *include_dir_at (dir_index index) const |
8c43009f | 1208 | { |
ecfb656c PA |
1209 | /* Convert directory index number (1-based) to vector index |
1210 | (0-based). */ | |
1211 | size_t vec_index = to_underlying (index) - 1; | |
1212 | ||
1213 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1214 | return NULL; |
ecfb656c | 1215 | return include_dirs[vec_index]; |
8c43009f PA |
1216 | } |
1217 | ||
ecfb656c | 1218 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1219 | is out of bounds. */ |
ecfb656c | 1220 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1221 | { |
ecfb656c PA |
1222 | /* Convert file name index number (1-based) to vector index |
1223 | (0-based). */ | |
1224 | size_t vec_index = to_underlying (index) - 1; | |
1225 | ||
1226 | if (vec_index >= file_names.size ()) | |
fff8551c | 1227 | return NULL; |
ecfb656c | 1228 | return &file_names[vec_index]; |
fff8551c PA |
1229 | } |
1230 | ||
1231 | /* Const version of the above. */ | |
1232 | const file_entry *file_name_at (unsigned int index) const | |
1233 | { | |
1234 | if (index >= file_names.size ()) | |
8c43009f PA |
1235 | return NULL; |
1236 | return &file_names[index]; | |
1237 | } | |
1238 | ||
527f3840 | 1239 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1240 | sect_offset sect_off {}; |
527f3840 JK |
1241 | |
1242 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1243 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1244 | ||
1245 | unsigned int total_length {}; | |
1246 | unsigned short version {}; | |
1247 | unsigned int header_length {}; | |
1248 | unsigned char minimum_instruction_length {}; | |
1249 | unsigned char maximum_ops_per_instruction {}; | |
1250 | unsigned char default_is_stmt {}; | |
1251 | int line_base {}; | |
1252 | unsigned char line_range {}; | |
1253 | unsigned char opcode_base {}; | |
debd256d JB |
1254 | |
1255 | /* standard_opcode_lengths[i] is the number of operands for the | |
1256 | standard opcode whose value is i. This means that | |
1257 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1258 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1259 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1260 | |
fff8551c PA |
1261 | /* The include_directories table. Note these are observing |
1262 | pointers. The memory is owned by debug_line_buffer. */ | |
1263 | std::vector<const char *> include_dirs; | |
debd256d | 1264 | |
fff8551c PA |
1265 | /* The file_names table. */ |
1266 | std::vector<file_entry> file_names; | |
debd256d JB |
1267 | |
1268 | /* The start and end of the statement program following this | |
6502dd73 | 1269 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1270 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1271 | }; |
c906108c | 1272 | |
fff8551c PA |
1273 | typedef std::unique_ptr<line_header> line_header_up; |
1274 | ||
8c43009f PA |
1275 | const char * |
1276 | file_entry::include_dir (const line_header *lh) const | |
1277 | { | |
ecfb656c | 1278 | return lh->include_dir_at (d_index); |
8c43009f PA |
1279 | } |
1280 | ||
c906108c | 1281 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1282 | need this much information. */ |
c906108c SS |
1283 | struct partial_die_info |
1284 | { | |
72bf9492 | 1285 | /* Offset of this DIE. */ |
9c541725 | 1286 | sect_offset sect_off; |
72bf9492 DJ |
1287 | |
1288 | /* DWARF-2 tag for this DIE. */ | |
1289 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1290 | ||
72bf9492 DJ |
1291 | /* Assorted flags describing the data found in this DIE. */ |
1292 | unsigned int has_children : 1; | |
1293 | unsigned int is_external : 1; | |
1294 | unsigned int is_declaration : 1; | |
1295 | unsigned int has_type : 1; | |
1296 | unsigned int has_specification : 1; | |
1297 | unsigned int has_pc_info : 1; | |
481860b3 | 1298 | unsigned int may_be_inlined : 1; |
72bf9492 | 1299 | |
0c1b455e TT |
1300 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1301 | unsigned int main_subprogram : 1; | |
1302 | ||
72bf9492 DJ |
1303 | /* Flag set if the SCOPE field of this structure has been |
1304 | computed. */ | |
1305 | unsigned int scope_set : 1; | |
1306 | ||
fa4028e9 JB |
1307 | /* Flag set if the DIE has a byte_size attribute. */ |
1308 | unsigned int has_byte_size : 1; | |
1309 | ||
ff908ebf AW |
1310 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1311 | unsigned int has_const_value : 1; | |
1312 | ||
98bfdba5 PA |
1313 | /* Flag set if any of the DIE's children are template arguments. */ |
1314 | unsigned int has_template_arguments : 1; | |
1315 | ||
abc72ce4 DE |
1316 | /* Flag set if fixup_partial_die has been called on this die. */ |
1317 | unsigned int fixup_called : 1; | |
1318 | ||
36586728 TT |
1319 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1320 | unsigned int is_dwz : 1; | |
1321 | ||
1322 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1323 | unsigned int spec_is_dwz : 1; | |
1324 | ||
72bf9492 | 1325 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1326 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1327 | const char *name; |
72bf9492 | 1328 | |
abc72ce4 DE |
1329 | /* The linkage name, if present. */ |
1330 | const char *linkage_name; | |
1331 | ||
72bf9492 DJ |
1332 | /* The scope to prepend to our children. This is generally |
1333 | allocated on the comp_unit_obstack, so will disappear | |
1334 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1335 | const char *scope; |
72bf9492 | 1336 | |
95554aad TT |
1337 | /* Some data associated with the partial DIE. The tag determines |
1338 | which field is live. */ | |
1339 | union | |
1340 | { | |
1341 | /* The location description associated with this DIE, if any. */ | |
1342 | struct dwarf_block *locdesc; | |
1343 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1344 | sect_offset sect_off; |
95554aad | 1345 | } d; |
72bf9492 DJ |
1346 | |
1347 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1348 | CORE_ADDR lowpc; |
1349 | CORE_ADDR highpc; | |
72bf9492 | 1350 | |
93311388 | 1351 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1352 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1353 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1354 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1355 | const gdb_byte *sibling; |
72bf9492 DJ |
1356 | |
1357 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1358 | DW_AT_specification (or DW_AT_abstract_origin or | |
1359 | DW_AT_extension). */ | |
b64f50a1 | 1360 | sect_offset spec_offset; |
72bf9492 DJ |
1361 | |
1362 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1363 | if any. */ | |
1364 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1365 | }; |
1366 | ||
0963b4bd | 1367 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1368 | struct abbrev_info |
1369 | { | |
1370 | unsigned int number; /* number identifying abbrev */ | |
1371 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1372 | unsigned short has_children; /* boolean */ |
1373 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1374 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1375 | struct abbrev_info *next; /* next in chain */ | |
1376 | }; | |
1377 | ||
1378 | struct attr_abbrev | |
1379 | { | |
9d25dd43 DE |
1380 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1381 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1382 | |
1383 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1384 | LONGEST implicit_const; | |
c906108c SS |
1385 | }; |
1386 | ||
433df2d4 DE |
1387 | /* Size of abbrev_table.abbrev_hash_table. */ |
1388 | #define ABBREV_HASH_SIZE 121 | |
1389 | ||
1390 | /* Top level data structure to contain an abbreviation table. */ | |
1391 | ||
1392 | struct abbrev_table | |
1393 | { | |
f4dc4d17 DE |
1394 | /* Where the abbrev table came from. |
1395 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1396 | sect_offset sect_off; |
433df2d4 DE |
1397 | |
1398 | /* Storage for the abbrev table. */ | |
1399 | struct obstack abbrev_obstack; | |
1400 | ||
1401 | /* Hash table of abbrevs. | |
1402 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1403 | It could be statically allocated, but the previous code didn't so we | |
1404 | don't either. */ | |
1405 | struct abbrev_info **abbrevs; | |
1406 | }; | |
1407 | ||
0963b4bd | 1408 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1409 | struct attribute |
1410 | { | |
9d25dd43 | 1411 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1412 | ENUM_BITFIELD(dwarf_form) form : 15; |
1413 | ||
1414 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1415 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1416 | here for better struct attribute alignment. */ | |
1417 | unsigned int string_is_canonical : 1; | |
1418 | ||
b60c80d6 DJ |
1419 | union |
1420 | { | |
15d034d0 | 1421 | const char *str; |
b60c80d6 | 1422 | struct dwarf_block *blk; |
43bbcdc2 PH |
1423 | ULONGEST unsnd; |
1424 | LONGEST snd; | |
b60c80d6 | 1425 | CORE_ADDR addr; |
ac9ec31b | 1426 | ULONGEST signature; |
b60c80d6 DJ |
1427 | } |
1428 | u; | |
1429 | }; | |
1430 | ||
0963b4bd | 1431 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1432 | struct die_info |
1433 | { | |
76815b17 DE |
1434 | /* DWARF-2 tag for this DIE. */ |
1435 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1436 | ||
1437 | /* Number of attributes */ | |
98bfdba5 PA |
1438 | unsigned char num_attrs; |
1439 | ||
1440 | /* True if we're presently building the full type name for the | |
1441 | type derived from this DIE. */ | |
1442 | unsigned char building_fullname : 1; | |
76815b17 | 1443 | |
adde2bff DE |
1444 | /* True if this die is in process. PR 16581. */ |
1445 | unsigned char in_process : 1; | |
1446 | ||
76815b17 DE |
1447 | /* Abbrev number */ |
1448 | unsigned int abbrev; | |
1449 | ||
93311388 | 1450 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1451 | sect_offset sect_off; |
78ba4af6 JB |
1452 | |
1453 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1454 | points to this die's parent; CHILD points to the first child of | |
1455 | this node; and all the children of a given node are chained | |
4950bc1c | 1456 | together via their SIBLING fields. */ |
639d11d3 DC |
1457 | struct die_info *child; /* Its first child, if any. */ |
1458 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1459 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1460 | |
b60c80d6 DJ |
1461 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1462 | zero, but it's not common and zero-sized arrays are not | |
1463 | sufficiently portable C. */ | |
1464 | struct attribute attrs[1]; | |
c906108c SS |
1465 | }; |
1466 | ||
0963b4bd | 1467 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1468 | |
1469 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1470 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1471 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1472 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1473 | #define DW_SND(attr) ((attr)->u.snd) | |
1474 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1475 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1476 | |
0963b4bd | 1477 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1478 | struct dwarf_block |
1479 | { | |
56eb65bd | 1480 | size_t size; |
1d6edc3c JK |
1481 | |
1482 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1483 | const gdb_byte *data; |
c906108c SS |
1484 | }; |
1485 | ||
c906108c SS |
1486 | #ifndef ATTR_ALLOC_CHUNK |
1487 | #define ATTR_ALLOC_CHUNK 4 | |
1488 | #endif | |
1489 | ||
c906108c SS |
1490 | /* Allocate fields for structs, unions and enums in this size. */ |
1491 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1492 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1493 | #endif | |
1494 | ||
c906108c SS |
1495 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1496 | but this would require a corresponding change in unpack_field_as_long | |
1497 | and friends. */ | |
1498 | static int bits_per_byte = 8; | |
1499 | ||
52059ffd TT |
1500 | struct nextfield |
1501 | { | |
1502 | struct nextfield *next; | |
1503 | int accessibility; | |
1504 | int virtuality; | |
1505 | struct field field; | |
1506 | }; | |
1507 | ||
1508 | struct nextfnfield | |
1509 | { | |
1510 | struct nextfnfield *next; | |
1511 | struct fn_field fnfield; | |
1512 | }; | |
1513 | ||
1514 | struct fnfieldlist | |
1515 | { | |
1516 | const char *name; | |
1517 | int length; | |
1518 | struct nextfnfield *head; | |
1519 | }; | |
1520 | ||
1521 | struct typedef_field_list | |
1522 | { | |
1523 | struct typedef_field field; | |
1524 | struct typedef_field_list *next; | |
1525 | }; | |
1526 | ||
c906108c SS |
1527 | /* The routines that read and process dies for a C struct or C++ class |
1528 | pass lists of data member fields and lists of member function fields | |
1529 | in an instance of a field_info structure, as defined below. */ | |
1530 | struct field_info | |
c5aa993b | 1531 | { |
0963b4bd | 1532 | /* List of data member and baseclasses fields. */ |
52059ffd | 1533 | struct nextfield *fields, *baseclasses; |
c906108c | 1534 | |
7d0ccb61 | 1535 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1536 | int nfields; |
c906108c | 1537 | |
c5aa993b JM |
1538 | /* Number of baseclasses. */ |
1539 | int nbaseclasses; | |
c906108c | 1540 | |
c5aa993b JM |
1541 | /* Set if the accesibility of one of the fields is not public. */ |
1542 | int non_public_fields; | |
c906108c | 1543 | |
c5aa993b JM |
1544 | /* Member function fieldlist array, contains name of possibly overloaded |
1545 | member function, number of overloaded member functions and a pointer | |
1546 | to the head of the member function field chain. */ | |
52059ffd | 1547 | struct fnfieldlist *fnfieldlists; |
c906108c | 1548 | |
c5aa993b JM |
1549 | /* Number of entries in the fnfieldlists array. */ |
1550 | int nfnfields; | |
98751a41 JK |
1551 | |
1552 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1553 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1554 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1555 | unsigned typedef_field_list_count; |
c5aa993b | 1556 | }; |
c906108c | 1557 | |
10b3939b DJ |
1558 | /* One item on the queue of compilation units to read in full symbols |
1559 | for. */ | |
1560 | struct dwarf2_queue_item | |
1561 | { | |
1562 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1563 | enum language pretend_language; |
10b3939b DJ |
1564 | struct dwarf2_queue_item *next; |
1565 | }; | |
1566 | ||
1567 | /* The current queue. */ | |
1568 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1569 | ||
ae038cb0 DJ |
1570 | /* Loaded secondary compilation units are kept in memory until they |
1571 | have not been referenced for the processing of this many | |
1572 | compilation units. Set this to zero to disable caching. Cache | |
1573 | sizes of up to at least twenty will improve startup time for | |
1574 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1575 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1576 | static void |
b4f54984 DE |
1577 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1578 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1579 | { |
3e43a32a | 1580 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1581 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1582 | value); |
1583 | } | |
4390d890 | 1584 | \f |
c906108c SS |
1585 | /* local function prototypes */ |
1586 | ||
a32a8923 DE |
1587 | static const char *get_section_name (const struct dwarf2_section_info *); |
1588 | ||
1589 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1590 | ||
918dd910 JK |
1591 | static void dwarf2_find_base_address (struct die_info *die, |
1592 | struct dwarf2_cu *cu); | |
1593 | ||
0018ea6f DE |
1594 | static struct partial_symtab *create_partial_symtab |
1595 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1596 | ||
f1902523 JK |
1597 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1598 | const gdb_byte *info_ptr, | |
1599 | struct die_info *type_unit_die, | |
1600 | int has_children, void *data); | |
1601 | ||
c67a9c90 | 1602 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1603 | |
72bf9492 DJ |
1604 | static void scan_partial_symbols (struct partial_die_info *, |
1605 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1606 | int, struct dwarf2_cu *); |
c906108c | 1607 | |
72bf9492 DJ |
1608 | static void add_partial_symbol (struct partial_die_info *, |
1609 | struct dwarf2_cu *); | |
63d06c5c | 1610 | |
72bf9492 DJ |
1611 | static void add_partial_namespace (struct partial_die_info *pdi, |
1612 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1613 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1614 | |
5d7cb8df | 1615 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1616 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1617 | struct dwarf2_cu *cu); |
1618 | ||
72bf9492 DJ |
1619 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1620 | struct dwarf2_cu *cu); | |
91c24f0a | 1621 | |
bc30ff58 JB |
1622 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1623 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1624 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1625 | |
257e7a09 YQ |
1626 | static void dwarf2_read_symtab (struct partial_symtab *, |
1627 | struct objfile *); | |
c906108c | 1628 | |
a14ed312 | 1629 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1630 | |
433df2d4 DE |
1631 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1632 | (const struct abbrev_table *, unsigned int); | |
1633 | ||
1634 | static struct abbrev_table *abbrev_table_read_table | |
1635 | (struct dwarf2_section_info *, sect_offset); | |
1636 | ||
1637 | static void abbrev_table_free (struct abbrev_table *); | |
1638 | ||
f4dc4d17 DE |
1639 | static void abbrev_table_free_cleanup (void *); |
1640 | ||
dee91e82 DE |
1641 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1642 | struct dwarf2_section_info *); | |
c906108c | 1643 | |
f3dd6933 | 1644 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1645 | |
d521ce57 | 1646 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1647 | |
dee91e82 | 1648 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1649 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1650 | |
d521ce57 TT |
1651 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1652 | struct partial_die_info *, | |
1653 | struct abbrev_info *, | |
1654 | unsigned int, | |
1655 | const gdb_byte *); | |
c906108c | 1656 | |
36586728 | 1657 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1658 | struct dwarf2_cu *); |
72bf9492 DJ |
1659 | |
1660 | static void fixup_partial_die (struct partial_die_info *, | |
1661 | struct dwarf2_cu *); | |
1662 | ||
d521ce57 TT |
1663 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1664 | struct attribute *, struct attr_abbrev *, | |
1665 | const gdb_byte *); | |
a8329558 | 1666 | |
a1855c1d | 1667 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1668 | |
a1855c1d | 1669 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1670 | |
a1855c1d | 1671 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1672 | |
a1855c1d | 1673 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1674 | |
a1855c1d | 1675 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1676 | |
d521ce57 | 1677 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1678 | unsigned int *); |
c906108c | 1679 | |
d521ce57 | 1680 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1681 | |
1682 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1683 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1684 | unsigned int *, unsigned int *); |
613e1657 | 1685 | |
d521ce57 TT |
1686 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1687 | const struct comp_unit_head *, | |
c764a876 DE |
1688 | unsigned int *); |
1689 | ||
d521ce57 | 1690 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1691 | |
f4dc4d17 DE |
1692 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1693 | sect_offset); | |
1694 | ||
d521ce57 | 1695 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1696 | |
d521ce57 | 1697 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1698 | |
d521ce57 TT |
1699 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1700 | const struct comp_unit_head *, | |
1701 | unsigned int *); | |
4bdf3d34 | 1702 | |
43988095 JK |
1703 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1704 | const struct comp_unit_head *, | |
1705 | unsigned int *); | |
36586728 | 1706 | |
43988095 | 1707 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1708 | |
d521ce57 | 1709 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1710 | |
d521ce57 TT |
1711 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1712 | const gdb_byte *, | |
3019eac3 DE |
1713 | unsigned int *); |
1714 | ||
d521ce57 | 1715 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1716 | ULONGEST str_index); |
3019eac3 | 1717 | |
e142c38c | 1718 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1719 | |
e142c38c DJ |
1720 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1721 | struct dwarf2_cu *); | |
c906108c | 1722 | |
348e048f | 1723 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1724 | unsigned int); |
348e048f | 1725 | |
7d45c7c3 KB |
1726 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1727 | struct dwarf2_cu *cu); | |
1728 | ||
05cf31d1 JB |
1729 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1730 | struct dwarf2_cu *cu); | |
1731 | ||
e142c38c | 1732 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1733 | |
e142c38c | 1734 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1735 | struct dwarf2_cu **); |
63d06c5c | 1736 | |
9c541725 | 1737 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1738 | struct dwarf2_cu *cu); |
debd256d | 1739 | |
f3f5162e | 1740 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1741 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1742 | CORE_ADDR, int decode_mapping); |
c906108c | 1743 | |
4d663531 | 1744 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1745 | |
43f3e411 DE |
1746 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1747 | const char *, const char *, | |
1748 | CORE_ADDR); | |
f4dc4d17 | 1749 | |
a14ed312 | 1750 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1751 | struct dwarf2_cu *); |
c906108c | 1752 | |
34eaf542 TT |
1753 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1754 | struct dwarf2_cu *, struct symbol *); | |
1755 | ||
ff39bb5e | 1756 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1757 | struct dwarf2_cu *); |
c906108c | 1758 | |
ff39bb5e | 1759 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1760 | struct type *type, |
1761 | const char *name, | |
1762 | struct obstack *obstack, | |
12df843f | 1763 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1764 | const gdb_byte **bytes, |
98bfdba5 | 1765 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1766 | |
e7c27a73 | 1767 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1768 | |
b4ba55a1 JB |
1769 | static int need_gnat_info (struct dwarf2_cu *); |
1770 | ||
3e43a32a MS |
1771 | static struct type *die_descriptive_type (struct die_info *, |
1772 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1773 | |
1774 | static void set_descriptive_type (struct type *, struct die_info *, | |
1775 | struct dwarf2_cu *); | |
1776 | ||
e7c27a73 DJ |
1777 | static struct type *die_containing_type (struct die_info *, |
1778 | struct dwarf2_cu *); | |
c906108c | 1779 | |
ff39bb5e | 1780 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1781 | struct dwarf2_cu *); |
c906108c | 1782 | |
f792889a | 1783 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1784 | |
673bfd45 DE |
1785 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1786 | ||
0d5cff50 | 1787 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1788 | |
6e70227d | 1789 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1790 | const char *suffix, int physname, |
1791 | struct dwarf2_cu *cu); | |
63d06c5c | 1792 | |
e7c27a73 | 1793 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1794 | |
348e048f DE |
1795 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1796 | ||
e7c27a73 | 1797 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1798 | |
e7c27a73 | 1799 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1800 | |
96408a79 SA |
1801 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1802 | ||
ff013f42 JK |
1803 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1804 | struct dwarf2_cu *, struct partial_symtab *); | |
1805 | ||
3a2b436a | 1806 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1807 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1808 | enum pc_bounds_kind |
1809 | { | |
e385593e | 1810 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1811 | PC_BOUNDS_NOT_PRESENT, |
1812 | ||
e385593e JK |
1813 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1814 | were present but they do not form a valid range of PC addresses. */ | |
1815 | PC_BOUNDS_INVALID, | |
1816 | ||
3a2b436a JK |
1817 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1818 | PC_BOUNDS_RANGES, | |
1819 | ||
1820 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1821 | PC_BOUNDS_HIGH_LOW, | |
1822 | }; | |
1823 | ||
1824 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1825 | CORE_ADDR *, CORE_ADDR *, | |
1826 | struct dwarf2_cu *, | |
1827 | struct partial_symtab *); | |
c906108c | 1828 | |
fae299cd DC |
1829 | static void get_scope_pc_bounds (struct die_info *, |
1830 | CORE_ADDR *, CORE_ADDR *, | |
1831 | struct dwarf2_cu *); | |
1832 | ||
801e3a5b JB |
1833 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1834 | CORE_ADDR, struct dwarf2_cu *); | |
1835 | ||
a14ed312 | 1836 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1837 | struct dwarf2_cu *); |
c906108c | 1838 | |
a14ed312 | 1839 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1840 | struct type *, struct dwarf2_cu *); |
c906108c | 1841 | |
a14ed312 | 1842 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1843 | struct die_info *, struct type *, |
e7c27a73 | 1844 | struct dwarf2_cu *); |
c906108c | 1845 | |
a14ed312 | 1846 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1847 | struct type *, |
1848 | struct dwarf2_cu *); | |
c906108c | 1849 | |
134d01f1 | 1850 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1851 | |
e7c27a73 | 1852 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1853 | |
e7c27a73 | 1854 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1855 | |
5d7cb8df JK |
1856 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1857 | ||
22cee43f PMR |
1858 | static struct using_direct **using_directives (enum language); |
1859 | ||
27aa8d6a SW |
1860 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1861 | ||
74921315 KS |
1862 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1863 | ||
f55ee35c JK |
1864 | static struct type *read_module_type (struct die_info *die, |
1865 | struct dwarf2_cu *cu); | |
1866 | ||
38d518c9 | 1867 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1868 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1869 | |
134d01f1 | 1870 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1871 | |
e7c27a73 | 1872 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1873 | |
6e70227d | 1874 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1875 | struct dwarf2_cu *); |
1876 | ||
bf6af496 | 1877 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1878 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1879 | struct die_info *); |
639d11d3 | 1880 | |
dee91e82 | 1881 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1882 | const gdb_byte *info_ptr, |
1883 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1884 | struct die_info *parent); |
1885 | ||
d521ce57 TT |
1886 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1887 | struct die_info **, const gdb_byte *, | |
1888 | int *, int); | |
3019eac3 | 1889 | |
d521ce57 TT |
1890 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1891 | struct die_info **, const gdb_byte *, | |
1892 | int *); | |
93311388 | 1893 | |
e7c27a73 | 1894 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1895 | |
15d034d0 TT |
1896 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1897 | struct obstack *); | |
71c25dea | 1898 | |
15d034d0 | 1899 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1900 | |
15d034d0 | 1901 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1902 | struct die_info *die, |
1903 | struct dwarf2_cu *cu); | |
1904 | ||
ca69b9e6 DE |
1905 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1906 | struct dwarf2_cu *cu); | |
1907 | ||
e142c38c | 1908 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1909 | struct dwarf2_cu **); |
9219021c | 1910 | |
f39c6ffd | 1911 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1912 | |
f39c6ffd | 1913 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1914 | |
f39c6ffd | 1915 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1916 | |
a121b7c1 | 1917 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1918 | |
f39c6ffd | 1919 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1920 | |
f9aca02d | 1921 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1922 | |
d97bc12b DE |
1923 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1924 | ||
1925 | static void dump_die_for_error (struct die_info *); | |
1926 | ||
1927 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1928 | struct die_info *); | |
c906108c | 1929 | |
d97bc12b | 1930 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1931 | |
51545339 | 1932 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1933 | struct dwarf2_cu *); |
c906108c | 1934 | |
ff39bb5e | 1935 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1936 | |
ff39bb5e | 1937 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1938 | |
348e048f | 1939 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1940 | const struct attribute *, |
348e048f DE |
1941 | struct dwarf2_cu **); |
1942 | ||
10b3939b | 1943 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1944 | const struct attribute *, |
f2f0e013 | 1945 | struct dwarf2_cu **); |
c906108c | 1946 | |
348e048f | 1947 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1948 | const struct attribute *, |
348e048f DE |
1949 | struct dwarf2_cu **); |
1950 | ||
ac9ec31b DE |
1951 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1952 | struct dwarf2_cu *); | |
1953 | ||
1954 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1955 | const struct attribute *, |
ac9ec31b DE |
1956 | struct dwarf2_cu *); |
1957 | ||
e5fe5e75 | 1958 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1959 | |
52dc124a | 1960 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1961 | |
63e43d3a PMR |
1962 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1963 | struct die_info *die, struct dwarf2_cu *cu, | |
1964 | struct dynamic_prop *prop); | |
1965 | ||
c906108c SS |
1966 | /* memory allocation interface */ |
1967 | ||
7b5a2f43 | 1968 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1969 | |
b60c80d6 | 1970 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1971 | |
43f3e411 | 1972 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1973 | |
6e5a29e1 | 1974 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1975 | |
6e5a29e1 | 1976 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1977 | |
6e5a29e1 | 1978 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1979 | |
6e5a29e1 | 1980 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1981 | |
8cf6f0b1 TT |
1982 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1983 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1984 | const struct attribute *attr); |
8cf6f0b1 | 1985 | |
ff39bb5e | 1986 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1987 | struct symbol *sym, |
f1e6e072 TT |
1988 | struct dwarf2_cu *cu, |
1989 | int is_block); | |
4c2df51b | 1990 | |
d521ce57 TT |
1991 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1992 | const gdb_byte *info_ptr, | |
1993 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1994 | |
72bf9492 DJ |
1995 | static void free_stack_comp_unit (void *); |
1996 | ||
72bf9492 DJ |
1997 | static hashval_t partial_die_hash (const void *item); |
1998 | ||
1999 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
2000 | ||
ae038cb0 | 2001 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 2002 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 2003 | |
9816fde3 | 2004 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 2005 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
2006 | |
2007 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
2008 | struct die_info *comp_unit_die, |
2009 | enum language pretend_language); | |
93311388 | 2010 | |
68dc6402 | 2011 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
2012 | |
2013 | static void free_cached_comp_units (void *); | |
2014 | ||
2015 | static void age_cached_comp_units (void); | |
2016 | ||
dee91e82 | 2017 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 2018 | |
f792889a DJ |
2019 | static struct type *set_die_type (struct die_info *, struct type *, |
2020 | struct dwarf2_cu *); | |
1c379e20 | 2021 | |
ae038cb0 DJ |
2022 | static void create_all_comp_units (struct objfile *); |
2023 | ||
0e50663e | 2024 | static int create_all_type_units (struct objfile *); |
1fd400ff | 2025 | |
95554aad TT |
2026 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
2027 | enum language); | |
10b3939b | 2028 | |
95554aad TT |
2029 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
2030 | enum language); | |
10b3939b | 2031 | |
f4dc4d17 DE |
2032 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
2033 | enum language); | |
2034 | ||
10b3939b DJ |
2035 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
2036 | struct dwarf2_per_cu_data *); | |
2037 | ||
ae038cb0 DJ |
2038 | static void dwarf2_mark (struct dwarf2_cu *); |
2039 | ||
2040 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
2041 | ||
b64f50a1 | 2042 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 2043 | struct dwarf2_per_cu_data *); |
673bfd45 | 2044 | |
f792889a | 2045 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 2046 | |
9291a0cd TT |
2047 | static void dwarf2_release_queue (void *dummy); |
2048 | ||
95554aad TT |
2049 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
2050 | enum language pretend_language); | |
2051 | ||
a0f42c21 | 2052 | static void process_queue (void); |
9291a0cd | 2053 | |
d721ba37 PA |
2054 | /* The return type of find_file_and_directory. Note, the enclosed |
2055 | string pointers are only valid while this object is valid. */ | |
2056 | ||
2057 | struct file_and_directory | |
2058 | { | |
2059 | /* The filename. This is never NULL. */ | |
2060 | const char *name; | |
2061 | ||
2062 | /* The compilation directory. NULL if not known. If we needed to | |
2063 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2064 | points directly to the DW_AT_comp_dir string attribute owned by | |
2065 | the obstack that owns the DIE. */ | |
2066 | const char *comp_dir; | |
2067 | ||
2068 | /* If we needed to build a new string for comp_dir, this is what | |
2069 | owns the storage. */ | |
2070 | std::string comp_dir_storage; | |
2071 | }; | |
2072 | ||
2073 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2074 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2075 | |
2076 | static char *file_full_name (int file, struct line_header *lh, | |
2077 | const char *comp_dir); | |
2078 | ||
43988095 JK |
2079 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2080 | enum class rcuh_kind { COMPILE, TYPE }; | |
2081 | ||
d521ce57 | 2082 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2083 | (struct comp_unit_head *header, |
2084 | struct dwarf2_section_info *section, | |
d521ce57 | 2085 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2086 | rcuh_kind section_kind); |
36586728 | 2087 | |
fd820528 | 2088 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2089 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2090 | int use_existing_cu, int keep, | |
3019eac3 DE |
2091 | die_reader_func_ftype *die_reader_func, void *data); |
2092 | ||
dee91e82 DE |
2093 | static void init_cutu_and_read_dies_simple |
2094 | (struct dwarf2_per_cu_data *this_cu, | |
2095 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2096 | |
673bfd45 | 2097 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2098 | |
3019eac3 DE |
2099 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2100 | ||
57d63ce2 DE |
2101 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2102 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2103 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2104 | |
2105 | static struct dwp_file *get_dwp_file (void); | |
2106 | ||
3019eac3 | 2107 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2108 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2109 | |
2110 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2111 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2112 | |
89e63ee4 DE |
2113 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2114 | ||
3019eac3 DE |
2115 | static void free_dwo_file_cleanup (void *); |
2116 | ||
95554aad TT |
2117 | static void process_cu_includes (void); |
2118 | ||
1b80a9fa | 2119 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2120 | |
2121 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2122 | \f |
2123 | /* Various complaints about symbol reading that don't abort the process. */ | |
2124 | ||
2125 | static void | |
2126 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2127 | { | |
2128 | complaint (&symfile_complaints, | |
2129 | _("statement list doesn't fit in .debug_line section")); | |
2130 | } | |
2131 | ||
2132 | static void | |
2133 | dwarf2_debug_line_missing_file_complaint (void) | |
2134 | { | |
2135 | complaint (&symfile_complaints, | |
2136 | _(".debug_line section has line data without a file")); | |
2137 | } | |
2138 | ||
2139 | static void | |
2140 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2141 | { | |
2142 | complaint (&symfile_complaints, | |
2143 | _(".debug_line section has line " | |
2144 | "program sequence without an end")); | |
2145 | } | |
2146 | ||
2147 | static void | |
2148 | dwarf2_complex_location_expr_complaint (void) | |
2149 | { | |
2150 | complaint (&symfile_complaints, _("location expression too complex")); | |
2151 | } | |
2152 | ||
2153 | static void | |
2154 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2155 | int arg3) | |
2156 | { | |
2157 | complaint (&symfile_complaints, | |
2158 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2159 | arg1, arg2, arg3); | |
2160 | } | |
2161 | ||
2162 | static void | |
2163 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2164 | { | |
2165 | complaint (&symfile_complaints, | |
2166 | _("debug info runs off end of %s section" | |
2167 | " [in module %s]"), | |
a32a8923 DE |
2168 | get_section_name (section), |
2169 | get_section_file_name (section)); | |
4390d890 | 2170 | } |
1b80a9fa | 2171 | |
4390d890 DE |
2172 | static void |
2173 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2174 | { | |
2175 | complaint (&symfile_complaints, | |
2176 | _("macro debug info contains a " | |
2177 | "malformed macro definition:\n`%s'"), | |
2178 | arg1); | |
2179 | } | |
2180 | ||
2181 | static void | |
2182 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2183 | { | |
2184 | complaint (&symfile_complaints, | |
2185 | _("invalid attribute class or form for '%s' in '%s'"), | |
2186 | arg1, arg2); | |
2187 | } | |
527f3840 JK |
2188 | |
2189 | /* Hash function for line_header_hash. */ | |
2190 | ||
2191 | static hashval_t | |
2192 | line_header_hash (const struct line_header *ofs) | |
2193 | { | |
9c541725 | 2194 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2195 | } |
2196 | ||
2197 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2198 | ||
2199 | static hashval_t | |
2200 | line_header_hash_voidp (const void *item) | |
2201 | { | |
9a3c8263 | 2202 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2203 | |
2204 | return line_header_hash (ofs); | |
2205 | } | |
2206 | ||
2207 | /* Equality function for line_header_hash. */ | |
2208 | ||
2209 | static int | |
2210 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2211 | { | |
9a3c8263 SM |
2212 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2213 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2214 | |
9c541725 | 2215 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2216 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2217 | } | |
2218 | ||
4390d890 | 2219 | \f |
9291a0cd | 2220 | |
31aa7e4e JB |
2221 | /* Read the given attribute value as an address, taking the attribute's |
2222 | form into account. */ | |
2223 | ||
2224 | static CORE_ADDR | |
2225 | attr_value_as_address (struct attribute *attr) | |
2226 | { | |
2227 | CORE_ADDR addr; | |
2228 | ||
2229 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2230 | { | |
2231 | /* Aside from a few clearly defined exceptions, attributes that | |
2232 | contain an address must always be in DW_FORM_addr form. | |
2233 | Unfortunately, some compilers happen to be violating this | |
2234 | requirement by encoding addresses using other forms, such | |
2235 | as DW_FORM_data4 for example. For those broken compilers, | |
2236 | we try to do our best, without any guarantee of success, | |
2237 | to interpret the address correctly. It would also be nice | |
2238 | to generate a complaint, but that would require us to maintain | |
2239 | a list of legitimate cases where a non-address form is allowed, | |
2240 | as well as update callers to pass in at least the CU's DWARF | |
2241 | version. This is more overhead than what we're willing to | |
2242 | expand for a pretty rare case. */ | |
2243 | addr = DW_UNSND (attr); | |
2244 | } | |
2245 | else | |
2246 | addr = DW_ADDR (attr); | |
2247 | ||
2248 | return addr; | |
2249 | } | |
2250 | ||
9291a0cd TT |
2251 | /* The suffix for an index file. */ |
2252 | #define INDEX_SUFFIX ".gdb-index" | |
2253 | ||
330cdd98 PA |
2254 | /* See declaration. */ |
2255 | ||
2256 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2257 | const dwarf2_debug_sections *names) | |
2258 | : objfile (objfile_) | |
2259 | { | |
2260 | if (names == NULL) | |
2261 | names = &dwarf2_elf_names; | |
2262 | ||
2263 | bfd *obfd = objfile->obfd; | |
2264 | ||
2265 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2266 | locate_sections (obfd, sec, *names); | |
2267 | } | |
2268 | ||
2269 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2270 | { | |
2271 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2272 | free_cached_comp_units (); | |
2273 | ||
2274 | if (quick_file_names_table) | |
2275 | htab_delete (quick_file_names_table); | |
2276 | ||
2277 | if (line_header_hash) | |
2278 | htab_delete (line_header_hash); | |
2279 | ||
2280 | /* Everything else should be on the objfile obstack. */ | |
2281 | } | |
2282 | ||
2283 | /* See declaration. */ | |
2284 | ||
2285 | void | |
2286 | dwarf2_per_objfile::free_cached_comp_units () | |
2287 | { | |
2288 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2289 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2290 | while (per_cu != NULL) | |
2291 | { | |
2292 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2293 | ||
2294 | free_heap_comp_unit (per_cu->cu); | |
2295 | *last_chain = next_cu; | |
2296 | per_cu = next_cu; | |
2297 | } | |
2298 | } | |
2299 | ||
c906108c | 2300 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2301 | information and return true if we have enough to do something. |
2302 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2303 | ELF names are used. */ | |
c906108c SS |
2304 | |
2305 | int | |
251d32d9 TG |
2306 | dwarf2_has_info (struct objfile *objfile, |
2307 | const struct dwarf2_debug_sections *names) | |
c906108c | 2308 | { |
9a3c8263 SM |
2309 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2310 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2311 | if (!dwarf2_per_objfile) |
2312 | { | |
2313 | /* Initialize per-objfile state. */ | |
2314 | struct dwarf2_per_objfile *data | |
8d749320 | 2315 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2316 | |
330cdd98 PA |
2317 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2318 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2319 | } |
73869dc2 | 2320 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2321 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2322 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2323 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2324 | } |
2325 | ||
2326 | /* Return the containing section of virtual section SECTION. */ | |
2327 | ||
2328 | static struct dwarf2_section_info * | |
2329 | get_containing_section (const struct dwarf2_section_info *section) | |
2330 | { | |
2331 | gdb_assert (section->is_virtual); | |
2332 | return section->s.containing_section; | |
c906108c SS |
2333 | } |
2334 | ||
a32a8923 DE |
2335 | /* Return the bfd owner of SECTION. */ |
2336 | ||
2337 | static struct bfd * | |
2338 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2339 | { | |
73869dc2 DE |
2340 | if (section->is_virtual) |
2341 | { | |
2342 | section = get_containing_section (section); | |
2343 | gdb_assert (!section->is_virtual); | |
2344 | } | |
049412e3 | 2345 | return section->s.section->owner; |
a32a8923 DE |
2346 | } |
2347 | ||
2348 | /* Return the bfd section of SECTION. | |
2349 | Returns NULL if the section is not present. */ | |
2350 | ||
2351 | static asection * | |
2352 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2353 | { | |
73869dc2 DE |
2354 | if (section->is_virtual) |
2355 | { | |
2356 | section = get_containing_section (section); | |
2357 | gdb_assert (!section->is_virtual); | |
2358 | } | |
049412e3 | 2359 | return section->s.section; |
a32a8923 DE |
2360 | } |
2361 | ||
2362 | /* Return the name of SECTION. */ | |
2363 | ||
2364 | static const char * | |
2365 | get_section_name (const struct dwarf2_section_info *section) | |
2366 | { | |
2367 | asection *sectp = get_section_bfd_section (section); | |
2368 | ||
2369 | gdb_assert (sectp != NULL); | |
2370 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2371 | } | |
2372 | ||
2373 | /* Return the name of the file SECTION is in. */ | |
2374 | ||
2375 | static const char * | |
2376 | get_section_file_name (const struct dwarf2_section_info *section) | |
2377 | { | |
2378 | bfd *abfd = get_section_bfd_owner (section); | |
2379 | ||
2380 | return bfd_get_filename (abfd); | |
2381 | } | |
2382 | ||
2383 | /* Return the id of SECTION. | |
2384 | Returns 0 if SECTION doesn't exist. */ | |
2385 | ||
2386 | static int | |
2387 | get_section_id (const struct dwarf2_section_info *section) | |
2388 | { | |
2389 | asection *sectp = get_section_bfd_section (section); | |
2390 | ||
2391 | if (sectp == NULL) | |
2392 | return 0; | |
2393 | return sectp->id; | |
2394 | } | |
2395 | ||
2396 | /* Return the flags of SECTION. | |
73869dc2 | 2397 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2398 | |
2399 | static int | |
2400 | get_section_flags (const struct dwarf2_section_info *section) | |
2401 | { | |
2402 | asection *sectp = get_section_bfd_section (section); | |
2403 | ||
2404 | gdb_assert (sectp != NULL); | |
2405 | return bfd_get_section_flags (sectp->owner, sectp); | |
2406 | } | |
2407 | ||
251d32d9 TG |
2408 | /* When loading sections, we look either for uncompressed section or for |
2409 | compressed section names. */ | |
233a11ab CS |
2410 | |
2411 | static int | |
251d32d9 TG |
2412 | section_is_p (const char *section_name, |
2413 | const struct dwarf2_section_names *names) | |
233a11ab | 2414 | { |
251d32d9 TG |
2415 | if (names->normal != NULL |
2416 | && strcmp (section_name, names->normal) == 0) | |
2417 | return 1; | |
2418 | if (names->compressed != NULL | |
2419 | && strcmp (section_name, names->compressed) == 0) | |
2420 | return 1; | |
2421 | return 0; | |
233a11ab CS |
2422 | } |
2423 | ||
330cdd98 | 2424 | /* See declaration. */ |
c906108c | 2425 | |
330cdd98 PA |
2426 | void |
2427 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2428 | const dwarf2_debug_sections &names) | |
c906108c | 2429 | { |
dc7650b8 | 2430 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2431 | |
dc7650b8 JK |
2432 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2433 | { | |
2434 | } | |
330cdd98 | 2435 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2436 | { |
330cdd98 PA |
2437 | this->info.s.section = sectp; |
2438 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2439 | } |
330cdd98 | 2440 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2441 | { |
330cdd98 PA |
2442 | this->abbrev.s.section = sectp; |
2443 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2444 | } |
330cdd98 | 2445 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2446 | { |
330cdd98 PA |
2447 | this->line.s.section = sectp; |
2448 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2449 | } |
330cdd98 | 2450 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2451 | { |
330cdd98 PA |
2452 | this->loc.s.section = sectp; |
2453 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2454 | } |
330cdd98 | 2455 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2456 | { |
330cdd98 PA |
2457 | this->loclists.s.section = sectp; |
2458 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2459 | } |
330cdd98 | 2460 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2461 | { |
330cdd98 PA |
2462 | this->macinfo.s.section = sectp; |
2463 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2464 | } |
330cdd98 | 2465 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2466 | { |
330cdd98 PA |
2467 | this->macro.s.section = sectp; |
2468 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2469 | } |
330cdd98 | 2470 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2471 | { |
330cdd98 PA |
2472 | this->str.s.section = sectp; |
2473 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2474 | } |
330cdd98 | 2475 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2476 | { |
330cdd98 PA |
2477 | this->line_str.s.section = sectp; |
2478 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2479 | } |
330cdd98 | 2480 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2481 | { |
330cdd98 PA |
2482 | this->addr.s.section = sectp; |
2483 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2484 | } |
330cdd98 | 2485 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2486 | { |
330cdd98 PA |
2487 | this->frame.s.section = sectp; |
2488 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2489 | } |
330cdd98 | 2490 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2491 | { |
330cdd98 PA |
2492 | this->eh_frame.s.section = sectp; |
2493 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2494 | } |
330cdd98 | 2495 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2496 | { |
330cdd98 PA |
2497 | this->ranges.s.section = sectp; |
2498 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2499 | } |
330cdd98 | 2500 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2501 | { |
330cdd98 PA |
2502 | this->rnglists.s.section = sectp; |
2503 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2504 | } |
330cdd98 | 2505 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2506 | { |
8b70b953 TT |
2507 | struct dwarf2_section_info type_section; |
2508 | ||
2509 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2510 | type_section.s.section = sectp; |
8b70b953 TT |
2511 | type_section.size = bfd_get_section_size (sectp); |
2512 | ||
330cdd98 | 2513 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2514 | &type_section); |
348e048f | 2515 | } |
330cdd98 | 2516 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2517 | { |
330cdd98 PA |
2518 | this->gdb_index.s.section = sectp; |
2519 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2520 | } |
dce234bc | 2521 | |
b4e1fd61 | 2522 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2523 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2524 | this->has_section_at_zero = true; |
c906108c SS |
2525 | } |
2526 | ||
fceca515 DE |
2527 | /* A helper function that decides whether a section is empty, |
2528 | or not present. */ | |
9e0ac564 TT |
2529 | |
2530 | static int | |
19ac8c2e | 2531 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2532 | { |
73869dc2 DE |
2533 | if (section->is_virtual) |
2534 | return section->size == 0; | |
049412e3 | 2535 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2536 | } |
2537 | ||
3019eac3 DE |
2538 | /* Read the contents of the section INFO. |
2539 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2540 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2541 | of the DWO file. | |
dce234bc | 2542 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2543 | |
dce234bc PP |
2544 | static void |
2545 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2546 | { |
a32a8923 | 2547 | asection *sectp; |
3019eac3 | 2548 | bfd *abfd; |
dce234bc | 2549 | gdb_byte *buf, *retbuf; |
c906108c | 2550 | |
be391dca TT |
2551 | if (info->readin) |
2552 | return; | |
dce234bc | 2553 | info->buffer = NULL; |
be391dca | 2554 | info->readin = 1; |
188dd5d6 | 2555 | |
9e0ac564 | 2556 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2557 | return; |
c906108c | 2558 | |
a32a8923 | 2559 | sectp = get_section_bfd_section (info); |
3019eac3 | 2560 | |
73869dc2 DE |
2561 | /* If this is a virtual section we need to read in the real one first. */ |
2562 | if (info->is_virtual) | |
2563 | { | |
2564 | struct dwarf2_section_info *containing_section = | |
2565 | get_containing_section (info); | |
2566 | ||
2567 | gdb_assert (sectp != NULL); | |
2568 | if ((sectp->flags & SEC_RELOC) != 0) | |
2569 | { | |
2570 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2571 | " supported in section %s [in module %s]"), | |
2572 | get_section_name (info), get_section_file_name (info)); | |
2573 | } | |
2574 | dwarf2_read_section (objfile, containing_section); | |
2575 | /* Other code should have already caught virtual sections that don't | |
2576 | fit. */ | |
2577 | gdb_assert (info->virtual_offset + info->size | |
2578 | <= containing_section->size); | |
2579 | /* If the real section is empty or there was a problem reading the | |
2580 | section we shouldn't get here. */ | |
2581 | gdb_assert (containing_section->buffer != NULL); | |
2582 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2583 | return; | |
2584 | } | |
2585 | ||
4bf44c1c TT |
2586 | /* If the section has relocations, we must read it ourselves. |
2587 | Otherwise we attach it to the BFD. */ | |
2588 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2589 | { |
d521ce57 | 2590 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2591 | return; |
dce234bc | 2592 | } |
dce234bc | 2593 | |
224c3ddb | 2594 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2595 | info->buffer = buf; |
dce234bc PP |
2596 | |
2597 | /* When debugging .o files, we may need to apply relocations; see | |
2598 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2599 | We never compress sections in .o files, so we only need to | |
2600 | try this when the section is not compressed. */ | |
ac8035ab | 2601 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2602 | if (retbuf != NULL) |
2603 | { | |
2604 | info->buffer = retbuf; | |
2605 | return; | |
2606 | } | |
2607 | ||
a32a8923 DE |
2608 | abfd = get_section_bfd_owner (info); |
2609 | gdb_assert (abfd != NULL); | |
2610 | ||
dce234bc PP |
2611 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2612 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2613 | { |
2614 | error (_("Dwarf Error: Can't read DWARF data" | |
2615 | " in section %s [in module %s]"), | |
2616 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2617 | } | |
dce234bc PP |
2618 | } |
2619 | ||
9e0ac564 TT |
2620 | /* A helper function that returns the size of a section in a safe way. |
2621 | If you are positive that the section has been read before using the | |
2622 | size, then it is safe to refer to the dwarf2_section_info object's | |
2623 | "size" field directly. In other cases, you must call this | |
2624 | function, because for compressed sections the size field is not set | |
2625 | correctly until the section has been read. */ | |
2626 | ||
2627 | static bfd_size_type | |
2628 | dwarf2_section_size (struct objfile *objfile, | |
2629 | struct dwarf2_section_info *info) | |
2630 | { | |
2631 | if (!info->readin) | |
2632 | dwarf2_read_section (objfile, info); | |
2633 | return info->size; | |
2634 | } | |
2635 | ||
dce234bc | 2636 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2637 | SECTION_NAME. */ |
af34e669 | 2638 | |
dce234bc | 2639 | void |
3017a003 TG |
2640 | dwarf2_get_section_info (struct objfile *objfile, |
2641 | enum dwarf2_section_enum sect, | |
d521ce57 | 2642 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2643 | bfd_size_type *sizep) |
2644 | { | |
2645 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2646 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2647 | dwarf2_objfile_data_key); | |
dce234bc | 2648 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2649 | |
2650 | /* We may see an objfile without any DWARF, in which case we just | |
2651 | return nothing. */ | |
2652 | if (data == NULL) | |
2653 | { | |
2654 | *sectp = NULL; | |
2655 | *bufp = NULL; | |
2656 | *sizep = 0; | |
2657 | return; | |
2658 | } | |
3017a003 TG |
2659 | switch (sect) |
2660 | { | |
2661 | case DWARF2_DEBUG_FRAME: | |
2662 | info = &data->frame; | |
2663 | break; | |
2664 | case DWARF2_EH_FRAME: | |
2665 | info = &data->eh_frame; | |
2666 | break; | |
2667 | default: | |
2668 | gdb_assert_not_reached ("unexpected section"); | |
2669 | } | |
dce234bc | 2670 | |
9e0ac564 | 2671 | dwarf2_read_section (objfile, info); |
dce234bc | 2672 | |
a32a8923 | 2673 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2674 | *bufp = info->buffer; |
2675 | *sizep = info->size; | |
2676 | } | |
2677 | ||
36586728 TT |
2678 | /* A helper function to find the sections for a .dwz file. */ |
2679 | ||
2680 | static void | |
2681 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2682 | { | |
9a3c8263 | 2683 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2684 | |
2685 | /* Note that we only support the standard ELF names, because .dwz | |
2686 | is ELF-only (at the time of writing). */ | |
2687 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2688 | { | |
049412e3 | 2689 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2690 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2691 | } | |
2692 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2693 | { | |
049412e3 | 2694 | dwz_file->info.s.section = sectp; |
36586728 TT |
2695 | dwz_file->info.size = bfd_get_section_size (sectp); |
2696 | } | |
2697 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2698 | { | |
049412e3 | 2699 | dwz_file->str.s.section = sectp; |
36586728 TT |
2700 | dwz_file->str.size = bfd_get_section_size (sectp); |
2701 | } | |
2702 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2703 | { | |
049412e3 | 2704 | dwz_file->line.s.section = sectp; |
36586728 TT |
2705 | dwz_file->line.size = bfd_get_section_size (sectp); |
2706 | } | |
2707 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2708 | { | |
049412e3 | 2709 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2710 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2711 | } | |
2ec9a5e0 TT |
2712 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2713 | { | |
049412e3 | 2714 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2715 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2716 | } | |
36586728 TT |
2717 | } |
2718 | ||
4db1a1dc TT |
2719 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2720 | there is no .gnu_debugaltlink section in the file. Error if there | |
2721 | is such a section but the file cannot be found. */ | |
36586728 TT |
2722 | |
2723 | static struct dwz_file * | |
2724 | dwarf2_get_dwz_file (void) | |
2725 | { | |
36586728 TT |
2726 | const char *filename; |
2727 | struct dwz_file *result; | |
acd13123 | 2728 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2729 | size_t buildid_len; |
2730 | bfd_byte *buildid; | |
36586728 TT |
2731 | |
2732 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2733 | return dwarf2_per_objfile->dwz_file; | |
2734 | ||
4db1a1dc | 2735 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2736 | gdb::unique_xmalloc_ptr<char> data |
2737 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2738 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2739 | if (data == NULL) |
2740 | { | |
2741 | if (bfd_get_error () == bfd_error_no_error) | |
2742 | return NULL; | |
2743 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2744 | bfd_errmsg (bfd_get_error ())); | |
2745 | } | |
791afaa2 TT |
2746 | |
2747 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2748 | |
acd13123 TT |
2749 | buildid_len = (size_t) buildid_len_arg; |
2750 | ||
791afaa2 | 2751 | filename = data.get (); |
d721ba37 PA |
2752 | |
2753 | std::string abs_storage; | |
36586728 TT |
2754 | if (!IS_ABSOLUTE_PATH (filename)) |
2755 | { | |
14278e1f TT |
2756 | gdb::unique_xmalloc_ptr<char> abs |
2757 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2758 | |
14278e1f | 2759 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2760 | filename = abs_storage.c_str (); |
36586728 TT |
2761 | } |
2762 | ||
dc294be5 TT |
2763 | /* First try the file name given in the section. If that doesn't |
2764 | work, try to use the build-id instead. */ | |
192b62ce | 2765 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2766 | if (dwz_bfd != NULL) |
36586728 | 2767 | { |
192b62ce TT |
2768 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2769 | dwz_bfd.release (); | |
36586728 TT |
2770 | } |
2771 | ||
dc294be5 TT |
2772 | if (dwz_bfd == NULL) |
2773 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2774 | ||
2775 | if (dwz_bfd == NULL) | |
2776 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2777 | objfile_name (dwarf2_per_objfile->objfile)); | |
2778 | ||
36586728 TT |
2779 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2780 | struct dwz_file); | |
192b62ce | 2781 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2782 | |
192b62ce | 2783 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 | 2784 | |
192b62ce | 2785 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2786 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2787 | return result; |
2788 | } | |
9291a0cd | 2789 | \f |
7b9f3c50 DE |
2790 | /* DWARF quick_symbols_functions support. */ |
2791 | ||
2792 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2793 | unique line tables, so we maintain a separate table of all .debug_line | |
2794 | derived entries to support the sharing. | |
2795 | All the quick functions need is the list of file names. We discard the | |
2796 | line_header when we're done and don't need to record it here. */ | |
2797 | struct quick_file_names | |
2798 | { | |
094b34ac DE |
2799 | /* The data used to construct the hash key. */ |
2800 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2801 | |
2802 | /* The number of entries in file_names, real_names. */ | |
2803 | unsigned int num_file_names; | |
2804 | ||
2805 | /* The file names from the line table, after being run through | |
2806 | file_full_name. */ | |
2807 | const char **file_names; | |
2808 | ||
2809 | /* The file names from the line table after being run through | |
2810 | gdb_realpath. These are computed lazily. */ | |
2811 | const char **real_names; | |
2812 | }; | |
2813 | ||
2814 | /* When using the index (and thus not using psymtabs), each CU has an | |
2815 | object of this type. This is used to hold information needed by | |
2816 | the various "quick" methods. */ | |
2817 | struct dwarf2_per_cu_quick_data | |
2818 | { | |
2819 | /* The file table. This can be NULL if there was no file table | |
2820 | or it's currently not read in. | |
2821 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2822 | struct quick_file_names *file_names; | |
2823 | ||
2824 | /* The corresponding symbol table. This is NULL if symbols for this | |
2825 | CU have not yet been read. */ | |
43f3e411 | 2826 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2827 | |
2828 | /* A temporary mark bit used when iterating over all CUs in | |
2829 | expand_symtabs_matching. */ | |
2830 | unsigned int mark : 1; | |
2831 | ||
2832 | /* True if we've tried to read the file table and found there isn't one. | |
2833 | There will be no point in trying to read it again next time. */ | |
2834 | unsigned int no_file_data : 1; | |
2835 | }; | |
2836 | ||
094b34ac DE |
2837 | /* Utility hash function for a stmt_list_hash. */ |
2838 | ||
2839 | static hashval_t | |
2840 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2841 | { | |
2842 | hashval_t v = 0; | |
2843 | ||
2844 | if (stmt_list_hash->dwo_unit != NULL) | |
2845 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2846 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2847 | return v; |
2848 | } | |
2849 | ||
2850 | /* Utility equality function for a stmt_list_hash. */ | |
2851 | ||
2852 | static int | |
2853 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2854 | const struct stmt_list_hash *rhs) | |
2855 | { | |
2856 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2857 | return 0; | |
2858 | if (lhs->dwo_unit != NULL | |
2859 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2860 | return 0; | |
2861 | ||
9c541725 | 2862 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2863 | } |
2864 | ||
7b9f3c50 DE |
2865 | /* Hash function for a quick_file_names. */ |
2866 | ||
2867 | static hashval_t | |
2868 | hash_file_name_entry (const void *e) | |
2869 | { | |
9a3c8263 SM |
2870 | const struct quick_file_names *file_data |
2871 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2872 | |
094b34ac | 2873 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2874 | } |
2875 | ||
2876 | /* Equality function for a quick_file_names. */ | |
2877 | ||
2878 | static int | |
2879 | eq_file_name_entry (const void *a, const void *b) | |
2880 | { | |
9a3c8263 SM |
2881 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2882 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2883 | |
094b34ac | 2884 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2885 | } |
2886 | ||
2887 | /* Delete function for a quick_file_names. */ | |
2888 | ||
2889 | static void | |
2890 | delete_file_name_entry (void *e) | |
2891 | { | |
9a3c8263 | 2892 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2893 | int i; |
2894 | ||
2895 | for (i = 0; i < file_data->num_file_names; ++i) | |
2896 | { | |
2897 | xfree ((void*) file_data->file_names[i]); | |
2898 | if (file_data->real_names) | |
2899 | xfree ((void*) file_data->real_names[i]); | |
2900 | } | |
2901 | ||
2902 | /* The space for the struct itself lives on objfile_obstack, | |
2903 | so we don't free it here. */ | |
2904 | } | |
2905 | ||
2906 | /* Create a quick_file_names hash table. */ | |
2907 | ||
2908 | static htab_t | |
2909 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2910 | { | |
2911 | return htab_create_alloc (nr_initial_entries, | |
2912 | hash_file_name_entry, eq_file_name_entry, | |
2913 | delete_file_name_entry, xcalloc, xfree); | |
2914 | } | |
9291a0cd | 2915 | |
918dd910 JK |
2916 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2917 | have to be created afterwards. You should call age_cached_comp_units after | |
2918 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2919 | ||
2920 | static void | |
2921 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2922 | { | |
3019eac3 | 2923 | if (per_cu->is_debug_types) |
e5fe5e75 | 2924 | load_full_type_unit (per_cu); |
918dd910 | 2925 | else |
95554aad | 2926 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2927 | |
cc12ce38 DE |
2928 | if (per_cu->cu == NULL) |
2929 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2930 | |
2931 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2932 | } |
2933 | ||
a0f42c21 | 2934 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2935 | |
9291a0cd | 2936 | static void |
a0f42c21 | 2937 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2938 | { |
2939 | struct cleanup *back_to; | |
2940 | ||
f4dc4d17 DE |
2941 | /* Skip type_unit_groups, reading the type units they contain |
2942 | is handled elsewhere. */ | |
2943 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2944 | return; | |
2945 | ||
9291a0cd TT |
2946 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2947 | ||
95554aad | 2948 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2949 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2950 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2951 | { | |
2952 | queue_comp_unit (per_cu, language_minimal); | |
2953 | load_cu (per_cu); | |
89e63ee4 DE |
2954 | |
2955 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2956 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2957 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2958 | if (!per_cu->is_debug_types | |
cc12ce38 | 2959 | && per_cu->cu != NULL |
89e63ee4 DE |
2960 | && per_cu->cu->dwo_unit != NULL |
2961 | && dwarf2_per_objfile->index_table != NULL | |
2962 | && dwarf2_per_objfile->index_table->version <= 7 | |
2963 | /* DWP files aren't supported yet. */ | |
2964 | && get_dwp_file () == NULL) | |
2965 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2966 | } |
9291a0cd | 2967 | |
a0f42c21 | 2968 | process_queue (); |
9291a0cd TT |
2969 | |
2970 | /* Age the cache, releasing compilation units that have not | |
2971 | been used recently. */ | |
2972 | age_cached_comp_units (); | |
2973 | ||
2974 | do_cleanups (back_to); | |
2975 | } | |
2976 | ||
2977 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2978 | the objfile from which this CU came. Returns the resulting symbol | |
2979 | table. */ | |
2fdf6df6 | 2980 | |
43f3e411 | 2981 | static struct compunit_symtab * |
a0f42c21 | 2982 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2983 | { |
95554aad | 2984 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2985 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2986 | { |
2987 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 2988 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 2989 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2990 | process_cu_includes (); |
9291a0cd TT |
2991 | do_cleanups (back_to); |
2992 | } | |
f194fefb | 2993 | |
43f3e411 | 2994 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2995 | } |
2996 | ||
8832e7e3 | 2997 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2998 | |
2999 | This is intended for loops like: | |
3000 | ||
3001 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
3002 | + dwarf2_per_objfile->n_type_units); ++i) | |
3003 | { | |
8832e7e3 | 3004 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
3005 | |
3006 | ...; | |
3007 | } | |
3008 | */ | |
2fdf6df6 | 3009 | |
1fd400ff | 3010 | static struct dwarf2_per_cu_data * |
8832e7e3 | 3011 | dw2_get_cutu (int index) |
1fd400ff TT |
3012 | { |
3013 | if (index >= dwarf2_per_objfile->n_comp_units) | |
3014 | { | |
f4dc4d17 | 3015 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
3016 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
3017 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
3018 | } |
3019 | ||
3020 | return dwarf2_per_objfile->all_comp_units[index]; | |
3021 | } | |
3022 | ||
8832e7e3 DE |
3023 | /* Return the CU given its index. |
3024 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
3025 | refers to a CU. */ | |
f4dc4d17 DE |
3026 | |
3027 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 3028 | dw2_get_cu (int index) |
f4dc4d17 | 3029 | { |
8832e7e3 | 3030 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 3031 | |
1fd400ff TT |
3032 | return dwarf2_per_objfile->all_comp_units[index]; |
3033 | } | |
3034 | ||
2ec9a5e0 TT |
3035 | /* A helper for create_cus_from_index that handles a given list of |
3036 | CUs. */ | |
2fdf6df6 | 3037 | |
74a0d9f6 | 3038 | static void |
2ec9a5e0 TT |
3039 | create_cus_from_index_list (struct objfile *objfile, |
3040 | const gdb_byte *cu_list, offset_type n_elements, | |
3041 | struct dwarf2_section_info *section, | |
3042 | int is_dwz, | |
3043 | int base_offset) | |
9291a0cd TT |
3044 | { |
3045 | offset_type i; | |
9291a0cd | 3046 | |
2ec9a5e0 | 3047 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3048 | { |
74a0d9f6 | 3049 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3050 | |
3051 | sect_offset sect_off | |
3052 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3053 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3054 | cu_list += 2 * 8; |
3055 | ||
9c541725 PA |
3056 | dwarf2_per_cu_data *the_cu |
3057 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3058 | struct dwarf2_per_cu_data); | |
3059 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3060 | the_cu->length = length; |
3061 | the_cu->objfile = objfile; | |
8a0459fd | 3062 | the_cu->section = section; |
9291a0cd TT |
3063 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3064 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3065 | the_cu->is_dwz = is_dwz; |
3066 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3067 | } |
9291a0cd TT |
3068 | } |
3069 | ||
2ec9a5e0 | 3070 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3071 | the CU objects for this objfile. */ |
2ec9a5e0 | 3072 | |
74a0d9f6 | 3073 | static void |
2ec9a5e0 TT |
3074 | create_cus_from_index (struct objfile *objfile, |
3075 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3076 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3077 | { | |
3078 | struct dwz_file *dwz; | |
3079 | ||
3080 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3081 | dwarf2_per_objfile->all_comp_units = |
3082 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3083 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3084 | |
74a0d9f6 JK |
3085 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3086 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3087 | |
3088 | if (dwz_elements == 0) | |
74a0d9f6 | 3089 | return; |
2ec9a5e0 TT |
3090 | |
3091 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3092 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3093 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3094 | } |
3095 | ||
1fd400ff | 3096 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3097 | |
74a0d9f6 | 3098 | static void |
673bfd45 | 3099 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3100 | struct dwarf2_section_info *section, |
673bfd45 DE |
3101 | const gdb_byte *bytes, |
3102 | offset_type elements) | |
1fd400ff TT |
3103 | { |
3104 | offset_type i; | |
673bfd45 | 3105 | htab_t sig_types_hash; |
1fd400ff | 3106 | |
6aa5f3a6 DE |
3107 | dwarf2_per_objfile->n_type_units |
3108 | = dwarf2_per_objfile->n_allocated_type_units | |
3109 | = elements / 3; | |
8d749320 SM |
3110 | dwarf2_per_objfile->all_type_units = |
3111 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3112 | |
673bfd45 | 3113 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3114 | |
3115 | for (i = 0; i < elements; i += 3) | |
3116 | { | |
52dc124a | 3117 | struct signatured_type *sig_type; |
9c541725 | 3118 | ULONGEST signature; |
1fd400ff | 3119 | void **slot; |
9c541725 | 3120 | cu_offset type_offset_in_tu; |
1fd400ff | 3121 | |
74a0d9f6 | 3122 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3123 | sect_offset sect_off |
3124 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3125 | type_offset_in_tu | |
3126 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3127 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3128 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3129 | bytes += 3 * 8; | |
3130 | ||
52dc124a | 3131 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3132 | struct signatured_type); |
52dc124a | 3133 | sig_type->signature = signature; |
9c541725 | 3134 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3135 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3136 | sig_type->per_cu.section = section; |
9c541725 | 3137 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3138 | sig_type->per_cu.objfile = objfile; |
3139 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3140 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3141 | struct dwarf2_per_cu_quick_data); | |
3142 | ||
52dc124a DE |
3143 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3144 | *slot = sig_type; | |
1fd400ff | 3145 | |
b4dd5633 | 3146 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3147 | } |
3148 | ||
673bfd45 | 3149 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3150 | } |
3151 | ||
9291a0cd TT |
3152 | /* Read the address map data from the mapped index, and use it to |
3153 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3154 | |
9291a0cd TT |
3155 | static void |
3156 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3157 | { | |
3e29f34a | 3158 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3159 | const gdb_byte *iter, *end; |
9291a0cd | 3160 | struct addrmap *mutable_map; |
9291a0cd TT |
3161 | CORE_ADDR baseaddr; |
3162 | ||
8268c778 PA |
3163 | auto_obstack temp_obstack; |
3164 | ||
9291a0cd TT |
3165 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3166 | ||
3167 | iter = index->address_table; | |
3168 | end = iter + index->address_table_size; | |
3169 | ||
3170 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3171 | ||
3172 | while (iter < end) | |
3173 | { | |
3174 | ULONGEST hi, lo, cu_index; | |
3175 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3176 | iter += 8; | |
3177 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3178 | iter += 8; | |
3179 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3180 | iter += 4; | |
f652bce2 | 3181 | |
24a55014 | 3182 | if (lo > hi) |
f652bce2 | 3183 | { |
24a55014 DE |
3184 | complaint (&symfile_complaints, |
3185 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3186 | hex_string (lo), hex_string (hi)); |
24a55014 | 3187 | continue; |
f652bce2 | 3188 | } |
24a55014 DE |
3189 | |
3190 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3191 | { |
3192 | complaint (&symfile_complaints, | |
3193 | _(".gdb_index address table has invalid CU number %u"), | |
3194 | (unsigned) cu_index); | |
24a55014 | 3195 | continue; |
f652bce2 | 3196 | } |
24a55014 | 3197 | |
3e29f34a MR |
3198 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3199 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3200 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3201 | } |
3202 | ||
3203 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3204 | &objfile->objfile_obstack); | |
9291a0cd TT |
3205 | } |
3206 | ||
59d7bcaf JK |
3207 | /* The hash function for strings in the mapped index. This is the same as |
3208 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3209 | implementation. This is necessary because the hash function is tied to the | |
3210 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3211 | SYMBOL_HASH_NEXT. |
3212 | ||
3213 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3214 | |
9291a0cd | 3215 | static hashval_t |
559a7a62 | 3216 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3217 | { |
3218 | const unsigned char *str = (const unsigned char *) p; | |
3219 | hashval_t r = 0; | |
3220 | unsigned char c; | |
3221 | ||
3222 | while ((c = *str++) != 0) | |
559a7a62 JK |
3223 | { |
3224 | if (index_version >= 5) | |
3225 | c = tolower (c); | |
3226 | r = r * 67 + c - 113; | |
3227 | } | |
9291a0cd TT |
3228 | |
3229 | return r; | |
3230 | } | |
3231 | ||
3232 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3233 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3234 | constant pool and return true. If NAME cannot be found, return |
3235 | false. */ | |
2fdf6df6 | 3236 | |
109483d9 | 3237 | static bool |
9291a0cd TT |
3238 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3239 | offset_type **vec_out) | |
3240 | { | |
0cf03b49 | 3241 | offset_type hash; |
9291a0cd | 3242 | offset_type slot, step; |
559a7a62 | 3243 | int (*cmp) (const char *, const char *); |
9291a0cd | 3244 | |
791afaa2 | 3245 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3246 | if (current_language->la_language == language_cplus |
45280282 IB |
3247 | || current_language->la_language == language_fortran |
3248 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3249 | { |
3250 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3251 | not contain any. */ | |
a8719064 | 3252 | |
72998fb3 | 3253 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3254 | { |
109483d9 | 3255 | without_params = cp_remove_params (name); |
0cf03b49 | 3256 | |
72998fb3 | 3257 | if (without_params != NULL) |
791afaa2 | 3258 | name = without_params.get (); |
0cf03b49 JK |
3259 | } |
3260 | } | |
3261 | ||
559a7a62 | 3262 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3263 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3264 | simulate our NAME being searched is also lowercased. */ |
3265 | hash = mapped_index_string_hash ((index->version == 4 | |
3266 | && case_sensitivity == case_sensitive_off | |
3267 | ? 5 : index->version), | |
3268 | name); | |
3269 | ||
3876f04e DE |
3270 | slot = hash & (index->symbol_table_slots - 1); |
3271 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3272 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3273 | |
3274 | for (;;) | |
3275 | { | |
3276 | /* Convert a slot number to an offset into the table. */ | |
3277 | offset_type i = 2 * slot; | |
3278 | const char *str; | |
3876f04e | 3279 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
109483d9 | 3280 | return false; |
9291a0cd | 3281 | |
3876f04e | 3282 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3283 | if (!cmp (name, str)) |
9291a0cd TT |
3284 | { |
3285 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3286 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
109483d9 | 3287 | return true; |
9291a0cd TT |
3288 | } |
3289 | ||
3876f04e | 3290 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3291 | } |
3292 | } | |
3293 | ||
2ec9a5e0 TT |
3294 | /* A helper function that reads the .gdb_index from SECTION and fills |
3295 | in MAP. FILENAME is the name of the file containing the section; | |
3296 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3297 | ok to use deprecated sections. | |
3298 | ||
3299 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3300 | out parameters that are filled in with information about the CU and | |
3301 | TU lists in the section. | |
3302 | ||
3303 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3304 | |
9291a0cd | 3305 | static int |
2ec9a5e0 TT |
3306 | read_index_from_section (struct objfile *objfile, |
3307 | const char *filename, | |
3308 | int deprecated_ok, | |
3309 | struct dwarf2_section_info *section, | |
3310 | struct mapped_index *map, | |
3311 | const gdb_byte **cu_list, | |
3312 | offset_type *cu_list_elements, | |
3313 | const gdb_byte **types_list, | |
3314 | offset_type *types_list_elements) | |
9291a0cd | 3315 | { |
948f8e3d | 3316 | const gdb_byte *addr; |
2ec9a5e0 | 3317 | offset_type version; |
b3b272e1 | 3318 | offset_type *metadata; |
1fd400ff | 3319 | int i; |
9291a0cd | 3320 | |
2ec9a5e0 | 3321 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3322 | return 0; |
82430852 JK |
3323 | |
3324 | /* Older elfutils strip versions could keep the section in the main | |
3325 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3326 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3327 | return 0; |
3328 | ||
2ec9a5e0 | 3329 | dwarf2_read_section (objfile, section); |
9291a0cd | 3330 | |
2ec9a5e0 | 3331 | addr = section->buffer; |
9291a0cd | 3332 | /* Version check. */ |
1fd400ff | 3333 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3334 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3335 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3336 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3337 | indices. */ |
831adc1f | 3338 | if (version < 4) |
481860b3 GB |
3339 | { |
3340 | static int warning_printed = 0; | |
3341 | if (!warning_printed) | |
3342 | { | |
3343 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3344 | filename); |
481860b3 GB |
3345 | warning_printed = 1; |
3346 | } | |
3347 | return 0; | |
3348 | } | |
3349 | /* Index version 4 uses a different hash function than index version | |
3350 | 5 and later. | |
3351 | ||
3352 | Versions earlier than 6 did not emit psymbols for inlined | |
3353 | functions. Using these files will cause GDB not to be able to | |
3354 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3355 | indices unless the user has done |
3356 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3357 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3358 | { |
3359 | static int warning_printed = 0; | |
3360 | if (!warning_printed) | |
3361 | { | |
e615022a DE |
3362 | warning (_("\ |
3363 | Skipping deprecated .gdb_index section in %s.\n\ | |
3364 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3365 | to use the section anyway."), | |
2ec9a5e0 | 3366 | filename); |
481860b3 GB |
3367 | warning_printed = 1; |
3368 | } | |
3369 | return 0; | |
3370 | } | |
796a7ff8 | 3371 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3372 | of the TU (for symbols coming from TUs), |
3373 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3374 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3375 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3376 | These are just performance bugs, and we can't distinguish gdb-generated | |
3377 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3378 | |
481860b3 | 3379 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3380 | longer backward compatible. */ |
796a7ff8 | 3381 | if (version > 8) |
594e8718 | 3382 | return 0; |
9291a0cd | 3383 | |
559a7a62 | 3384 | map->version = version; |
2ec9a5e0 | 3385 | map->total_size = section->size; |
9291a0cd TT |
3386 | |
3387 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3388 | |
3389 | i = 0; | |
2ec9a5e0 TT |
3390 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3391 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3392 | / 8); | |
1fd400ff TT |
3393 | ++i; |
3394 | ||
2ec9a5e0 TT |
3395 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3396 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3397 | - MAYBE_SWAP (metadata[i])) | |
3398 | / 8); | |
987d643c | 3399 | ++i; |
1fd400ff TT |
3400 | |
3401 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3402 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3403 | - MAYBE_SWAP (metadata[i])); | |
3404 | ++i; | |
3405 | ||
3876f04e DE |
3406 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3407 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3408 | - MAYBE_SWAP (metadata[i])) | |
3409 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3410 | ++i; |
9291a0cd | 3411 | |
f9d83a0b | 3412 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3413 | |
2ec9a5e0 TT |
3414 | return 1; |
3415 | } | |
3416 | ||
3417 | ||
3418 | /* Read the index file. If everything went ok, initialize the "quick" | |
3419 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3420 | ||
3421 | static int | |
3422 | dwarf2_read_index (struct objfile *objfile) | |
3423 | { | |
3424 | struct mapped_index local_map, *map; | |
3425 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3426 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3427 | struct dwz_file *dwz; |
2ec9a5e0 | 3428 | |
4262abfb | 3429 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3430 | use_deprecated_index_sections, |
3431 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3432 | &cu_list, &cu_list_elements, | |
3433 | &types_list, &types_list_elements)) | |
3434 | return 0; | |
3435 | ||
0fefef59 | 3436 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3437 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3438 | return 0; |
3439 | ||
2ec9a5e0 TT |
3440 | /* If there is a .dwz file, read it so we can get its CU list as |
3441 | well. */ | |
4db1a1dc TT |
3442 | dwz = dwarf2_get_dwz_file (); |
3443 | if (dwz != NULL) | |
2ec9a5e0 | 3444 | { |
2ec9a5e0 TT |
3445 | struct mapped_index dwz_map; |
3446 | const gdb_byte *dwz_types_ignore; | |
3447 | offset_type dwz_types_elements_ignore; | |
3448 | ||
3449 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3450 | 1, | |
3451 | &dwz->gdb_index, &dwz_map, | |
3452 | &dwz_list, &dwz_list_elements, | |
3453 | &dwz_types_ignore, | |
3454 | &dwz_types_elements_ignore)) | |
3455 | { | |
3456 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3457 | bfd_get_filename (dwz->dwz_bfd)); | |
3458 | return 0; | |
3459 | } | |
3460 | } | |
3461 | ||
74a0d9f6 JK |
3462 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3463 | dwz_list_elements); | |
1fd400ff | 3464 | |
8b70b953 TT |
3465 | if (types_list_elements) |
3466 | { | |
3467 | struct dwarf2_section_info *section; | |
3468 | ||
3469 | /* We can only handle a single .debug_types when we have an | |
3470 | index. */ | |
3471 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3472 | return 0; | |
3473 | ||
3474 | section = VEC_index (dwarf2_section_info_def, | |
3475 | dwarf2_per_objfile->types, 0); | |
3476 | ||
74a0d9f6 JK |
3477 | create_signatured_type_table_from_index (objfile, section, types_list, |
3478 | types_list_elements); | |
8b70b953 | 3479 | } |
9291a0cd | 3480 | |
2ec9a5e0 TT |
3481 | create_addrmap_from_index (objfile, &local_map); |
3482 | ||
8d749320 | 3483 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
3f563c84 | 3484 | map = new (map) mapped_index (); |
2ec9a5e0 | 3485 | *map = local_map; |
9291a0cd TT |
3486 | |
3487 | dwarf2_per_objfile->index_table = map; | |
3488 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3489 | dwarf2_per_objfile->quick_file_names_table = |
3490 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3491 | |
3492 | return 1; | |
3493 | } | |
3494 | ||
3495 | /* A helper for the "quick" functions which sets the global | |
3496 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3497 | |
9291a0cd TT |
3498 | static void |
3499 | dw2_setup (struct objfile *objfile) | |
3500 | { | |
9a3c8263 SM |
3501 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3502 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3503 | gdb_assert (dwarf2_per_objfile); |
3504 | } | |
3505 | ||
dee91e82 | 3506 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3507 | |
dee91e82 DE |
3508 | static void |
3509 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3510 | const gdb_byte *info_ptr, |
dee91e82 DE |
3511 | struct die_info *comp_unit_die, |
3512 | int has_children, | |
3513 | void *data) | |
9291a0cd | 3514 | { |
dee91e82 DE |
3515 | struct dwarf2_cu *cu = reader->cu; |
3516 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3517 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3518 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3519 | struct attribute *attr; |
dee91e82 | 3520 | int i; |
7b9f3c50 DE |
3521 | void **slot; |
3522 | struct quick_file_names *qfn; | |
9291a0cd | 3523 | |
0186c6a7 DE |
3524 | gdb_assert (! this_cu->is_debug_types); |
3525 | ||
07261596 TT |
3526 | /* Our callers never want to match partial units -- instead they |
3527 | will match the enclosing full CU. */ | |
3528 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3529 | { | |
3530 | this_cu->v.quick->no_file_data = 1; | |
3531 | return; | |
3532 | } | |
3533 | ||
0186c6a7 | 3534 | lh_cu = this_cu; |
7b9f3c50 | 3535 | slot = NULL; |
dee91e82 | 3536 | |
fff8551c | 3537 | line_header_up lh; |
9c541725 | 3538 | sect_offset line_offset {}; |
fff8551c | 3539 | |
dee91e82 | 3540 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3541 | if (attr) |
3542 | { | |
7b9f3c50 DE |
3543 | struct quick_file_names find_entry; |
3544 | ||
9c541725 | 3545 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3546 | |
3547 | /* We may have already read in this line header (TU line header sharing). | |
3548 | If we have we're done. */ | |
094b34ac | 3549 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3550 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3551 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3552 | &find_entry, INSERT); | |
3553 | if (*slot != NULL) | |
3554 | { | |
9a3c8263 | 3555 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3556 | return; |
7b9f3c50 DE |
3557 | } |
3558 | ||
3019eac3 | 3559 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3560 | } |
3561 | if (lh == NULL) | |
3562 | { | |
094b34ac | 3563 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3564 | return; |
9291a0cd TT |
3565 | } |
3566 | ||
8d749320 | 3567 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3568 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3569 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3570 | gdb_assert (slot != NULL); |
3571 | *slot = qfn; | |
9291a0cd | 3572 | |
d721ba37 | 3573 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3574 | |
fff8551c | 3575 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3576 | qfn->file_names = |
fff8551c PA |
3577 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3578 | for (i = 0; i < lh->file_names.size (); ++i) | |
3579 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3580 | qfn->real_names = NULL; |
9291a0cd | 3581 | |
094b34ac | 3582 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3583 | } |
3584 | ||
3585 | /* A helper for the "quick" functions which attempts to read the line | |
3586 | table for THIS_CU. */ | |
3587 | ||
3588 | static struct quick_file_names * | |
e4a48d9d | 3589 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3590 | { |
0186c6a7 DE |
3591 | /* This should never be called for TUs. */ |
3592 | gdb_assert (! this_cu->is_debug_types); | |
3593 | /* Nor type unit groups. */ | |
3594 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3595 | |
dee91e82 DE |
3596 | if (this_cu->v.quick->file_names != NULL) |
3597 | return this_cu->v.quick->file_names; | |
3598 | /* If we know there is no line data, no point in looking again. */ | |
3599 | if (this_cu->v.quick->no_file_data) | |
3600 | return NULL; | |
3601 | ||
0186c6a7 | 3602 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3603 | |
3604 | if (this_cu->v.quick->no_file_data) | |
3605 | return NULL; | |
3606 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3607 | } |
3608 | ||
3609 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3610 | real path for a given file name from the line table. */ |
2fdf6df6 | 3611 | |
9291a0cd | 3612 | static const char * |
7b9f3c50 DE |
3613 | dw2_get_real_path (struct objfile *objfile, |
3614 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3615 | { |
7b9f3c50 DE |
3616 | if (qfn->real_names == NULL) |
3617 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3618 | qfn->num_file_names, const char *); |
9291a0cd | 3619 | |
7b9f3c50 | 3620 | if (qfn->real_names[index] == NULL) |
14278e1f | 3621 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3622 | |
7b9f3c50 | 3623 | return qfn->real_names[index]; |
9291a0cd TT |
3624 | } |
3625 | ||
3626 | static struct symtab * | |
3627 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3628 | { | |
43f3e411 | 3629 | struct compunit_symtab *cust; |
9291a0cd | 3630 | int index; |
ae2de4f8 | 3631 | |
9291a0cd TT |
3632 | dw2_setup (objfile); |
3633 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3634 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3635 | if (cust == NULL) | |
3636 | return NULL; | |
3637 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3638 | } |
3639 | ||
7b9f3c50 DE |
3640 | /* Traversal function for dw2_forget_cached_source_info. */ |
3641 | ||
3642 | static int | |
3643 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3644 | { |
7b9f3c50 | 3645 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3646 | |
7b9f3c50 | 3647 | if (file_data->real_names) |
9291a0cd | 3648 | { |
7b9f3c50 | 3649 | int i; |
9291a0cd | 3650 | |
7b9f3c50 | 3651 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3652 | { |
7b9f3c50 DE |
3653 | xfree ((void*) file_data->real_names[i]); |
3654 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3655 | } |
3656 | } | |
7b9f3c50 DE |
3657 | |
3658 | return 1; | |
3659 | } | |
3660 | ||
3661 | static void | |
3662 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3663 | { | |
3664 | dw2_setup (objfile); | |
3665 | ||
3666 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3667 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3668 | } |
3669 | ||
f8eba3c6 TT |
3670 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3671 | the symtabs and calls the iterator. */ | |
3672 | ||
3673 | static int | |
3674 | dw2_map_expand_apply (struct objfile *objfile, | |
3675 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3676 | const char *name, const char *real_path, |
14bc53a8 | 3677 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3678 | { |
43f3e411 | 3679 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3680 | |
3681 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3682 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3683 | return 0; |
3684 | ||
3685 | /* This may expand more than one symtab, and we want to iterate over | |
3686 | all of them. */ | |
a0f42c21 | 3687 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3688 | |
14bc53a8 PA |
3689 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3690 | last_made, callback); | |
f8eba3c6 TT |
3691 | } |
3692 | ||
3693 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3694 | ||
14bc53a8 PA |
3695 | static bool |
3696 | dw2_map_symtabs_matching_filename | |
3697 | (struct objfile *objfile, const char *name, const char *real_path, | |
3698 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3699 | { |
3700 | int i; | |
c011a4f4 | 3701 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3702 | |
3703 | dw2_setup (objfile); | |
ae2de4f8 | 3704 | |
848e3e78 DE |
3705 | /* The rule is CUs specify all the files, including those used by |
3706 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3707 | |
848e3e78 | 3708 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3709 | { |
3710 | int j; | |
8832e7e3 | 3711 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3712 | struct quick_file_names *file_data; |
9291a0cd | 3713 | |
3d7bb9d9 | 3714 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3715 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3716 | continue; |
3717 | ||
e4a48d9d | 3718 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3719 | if (file_data == NULL) |
9291a0cd TT |
3720 | continue; |
3721 | ||
7b9f3c50 | 3722 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3723 | { |
7b9f3c50 | 3724 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3725 | const char *this_real_name; |
9291a0cd | 3726 | |
af529f8f | 3727 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3728 | { |
f5b95b50 | 3729 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3730 | callback)) |
3731 | return true; | |
288e77a7 | 3732 | continue; |
4aac40c8 | 3733 | } |
9291a0cd | 3734 | |
c011a4f4 DE |
3735 | /* Before we invoke realpath, which can get expensive when many |
3736 | files are involved, do a quick comparison of the basenames. */ | |
3737 | if (! basenames_may_differ | |
3738 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3739 | continue; | |
3740 | ||
da235a7c JK |
3741 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3742 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3743 | { |
da235a7c | 3744 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3745 | callback)) |
3746 | return true; | |
288e77a7 | 3747 | continue; |
da235a7c | 3748 | } |
9291a0cd | 3749 | |
da235a7c JK |
3750 | if (real_path != NULL) |
3751 | { | |
af529f8f JK |
3752 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3753 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3754 | if (this_real_name != NULL |
af529f8f | 3755 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3756 | { |
f5b95b50 | 3757 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3758 | callback)) |
3759 | return true; | |
288e77a7 | 3760 | continue; |
9291a0cd TT |
3761 | } |
3762 | } | |
3763 | } | |
3764 | } | |
3765 | ||
14bc53a8 | 3766 | return false; |
9291a0cd TT |
3767 | } |
3768 | ||
da51c347 DE |
3769 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3770 | ||
3771 | struct dw2_symtab_iterator | |
9291a0cd | 3772 | { |
da51c347 DE |
3773 | /* The internalized form of .gdb_index. */ |
3774 | struct mapped_index *index; | |
3775 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3776 | int want_specific_block; | |
3777 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3778 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3779 | int block_index; | |
3780 | /* The kind of symbol we're looking for. */ | |
3781 | domain_enum domain; | |
3782 | /* The list of CUs from the index entry of the symbol, | |
3783 | or NULL if not found. */ | |
3784 | offset_type *vec; | |
3785 | /* The next element in VEC to look at. */ | |
3786 | int next; | |
3787 | /* The number of elements in VEC, or zero if there is no match. */ | |
3788 | int length; | |
8943b874 DE |
3789 | /* Have we seen a global version of the symbol? |
3790 | If so we can ignore all further global instances. | |
3791 | This is to work around gold/15646, inefficient gold-generated | |
3792 | indices. */ | |
3793 | int global_seen; | |
da51c347 | 3794 | }; |
9291a0cd | 3795 | |
da51c347 DE |
3796 | /* Initialize the index symtab iterator ITER. |
3797 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3798 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3799 | |
9291a0cd | 3800 | static void |
da51c347 DE |
3801 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3802 | struct mapped_index *index, | |
3803 | int want_specific_block, | |
3804 | int block_index, | |
3805 | domain_enum domain, | |
3806 | const char *name) | |
3807 | { | |
3808 | iter->index = index; | |
3809 | iter->want_specific_block = want_specific_block; | |
3810 | iter->block_index = block_index; | |
3811 | iter->domain = domain; | |
3812 | iter->next = 0; | |
8943b874 | 3813 | iter->global_seen = 0; |
da51c347 DE |
3814 | |
3815 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3816 | iter->length = MAYBE_SWAP (*iter->vec); | |
3817 | else | |
3818 | { | |
3819 | iter->vec = NULL; | |
3820 | iter->length = 0; | |
3821 | } | |
3822 | } | |
3823 | ||
3824 | /* Return the next matching CU or NULL if there are no more. */ | |
3825 | ||
3826 | static struct dwarf2_per_cu_data * | |
3827 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3828 | { | |
3829 | for ( ; iter->next < iter->length; ++iter->next) | |
3830 | { | |
3831 | offset_type cu_index_and_attrs = | |
3832 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3833 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3834 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3835 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3836 | /* This value is only valid for index versions >= 7. */ | |
3837 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3838 | gdb_index_symbol_kind symbol_kind = | |
3839 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3840 | /* Only check the symbol attributes if they're present. | |
3841 | Indices prior to version 7 don't record them, | |
3842 | and indices >= 7 may elide them for certain symbols | |
3843 | (gold does this). */ | |
3844 | int attrs_valid = | |
3845 | (iter->index->version >= 7 | |
3846 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3847 | ||
3190f0c6 DE |
3848 | /* Don't crash on bad data. */ |
3849 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3850 | + dwarf2_per_objfile->n_type_units)) | |
3851 | { | |
3852 | complaint (&symfile_complaints, | |
3853 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3854 | " [in module %s]"), |
3855 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3856 | continue; |
3857 | } | |
3858 | ||
8832e7e3 | 3859 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3860 | |
da51c347 | 3861 | /* Skip if already read in. */ |
43f3e411 | 3862 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3863 | continue; |
3864 | ||
8943b874 DE |
3865 | /* Check static vs global. */ |
3866 | if (attrs_valid) | |
3867 | { | |
3868 | if (iter->want_specific_block | |
3869 | && want_static != is_static) | |
3870 | continue; | |
3871 | /* Work around gold/15646. */ | |
3872 | if (!is_static && iter->global_seen) | |
3873 | continue; | |
3874 | if (!is_static) | |
3875 | iter->global_seen = 1; | |
3876 | } | |
da51c347 DE |
3877 | |
3878 | /* Only check the symbol's kind if it has one. */ | |
3879 | if (attrs_valid) | |
3880 | { | |
3881 | switch (iter->domain) | |
3882 | { | |
3883 | case VAR_DOMAIN: | |
3884 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3885 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3886 | /* Some types are also in VAR_DOMAIN. */ | |
3887 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3888 | continue; | |
3889 | break; | |
3890 | case STRUCT_DOMAIN: | |
3891 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3892 | continue; | |
3893 | break; | |
3894 | case LABEL_DOMAIN: | |
3895 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3896 | continue; | |
3897 | break; | |
3898 | default: | |
3899 | break; | |
3900 | } | |
3901 | } | |
3902 | ||
3903 | ++iter->next; | |
3904 | return per_cu; | |
3905 | } | |
3906 | ||
3907 | return NULL; | |
3908 | } | |
3909 | ||
43f3e411 | 3910 | static struct compunit_symtab * |
da51c347 DE |
3911 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3912 | const char *name, domain_enum domain) | |
9291a0cd | 3913 | { |
43f3e411 | 3914 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3915 | struct mapped_index *index; |
3916 | ||
9291a0cd TT |
3917 | dw2_setup (objfile); |
3918 | ||
b5ec771e PA |
3919 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3920 | ||
156942c7 DE |
3921 | index = dwarf2_per_objfile->index_table; |
3922 | ||
da51c347 | 3923 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3924 | if (index) |
9291a0cd | 3925 | { |
da51c347 DE |
3926 | struct dw2_symtab_iterator iter; |
3927 | struct dwarf2_per_cu_data *per_cu; | |
3928 | ||
3929 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3930 | |
da51c347 | 3931 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3932 | { |
b2e2f908 | 3933 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3934 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3935 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3936 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3937 | |
b2e2f908 DE |
3938 | sym = block_find_symbol (block, name, domain, |
3939 | block_find_non_opaque_type_preferred, | |
3940 | &with_opaque); | |
3941 | ||
da51c347 DE |
3942 | /* Some caution must be observed with overloaded functions |
3943 | and methods, since the index will not contain any overload | |
3944 | information (but NAME might contain it). */ | |
da51c347 | 3945 | |
b2e2f908 | 3946 | if (sym != NULL |
b5ec771e | 3947 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
b2e2f908 DE |
3948 | return stab; |
3949 | if (with_opaque != NULL | |
b5ec771e | 3950 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
b2e2f908 | 3951 | stab_best = stab; |
da51c347 DE |
3952 | |
3953 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3954 | } |
3955 | } | |
9291a0cd | 3956 | |
da51c347 | 3957 | return stab_best; |
9291a0cd TT |
3958 | } |
3959 | ||
3960 | static void | |
3961 | dw2_print_stats (struct objfile *objfile) | |
3962 | { | |
e4a48d9d | 3963 | int i, total, count; |
9291a0cd TT |
3964 | |
3965 | dw2_setup (objfile); | |
e4a48d9d | 3966 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3967 | count = 0; |
e4a48d9d | 3968 | for (i = 0; i < total; ++i) |
9291a0cd | 3969 | { |
8832e7e3 | 3970 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3971 | |
43f3e411 | 3972 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3973 | ++count; |
3974 | } | |
e4a48d9d | 3975 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3976 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3977 | } | |
3978 | ||
779bd270 DE |
3979 | /* This dumps minimal information about the index. |
3980 | It is called via "mt print objfiles". | |
3981 | One use is to verify .gdb_index has been loaded by the | |
3982 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3983 | ||
9291a0cd TT |
3984 | static void |
3985 | dw2_dump (struct objfile *objfile) | |
3986 | { | |
779bd270 DE |
3987 | dw2_setup (objfile); |
3988 | gdb_assert (dwarf2_per_objfile->using_index); | |
3989 | printf_filtered (".gdb_index:"); | |
3990 | if (dwarf2_per_objfile->index_table != NULL) | |
3991 | { | |
3992 | printf_filtered (" version %d\n", | |
3993 | dwarf2_per_objfile->index_table->version); | |
3994 | } | |
3995 | else | |
3996 | printf_filtered (" faked for \"readnow\"\n"); | |
3997 | printf_filtered ("\n"); | |
9291a0cd TT |
3998 | } |
3999 | ||
4000 | static void | |
3189cb12 DE |
4001 | dw2_relocate (struct objfile *objfile, |
4002 | const struct section_offsets *new_offsets, | |
4003 | const struct section_offsets *delta) | |
9291a0cd TT |
4004 | { |
4005 | /* There's nothing to relocate here. */ | |
4006 | } | |
4007 | ||
4008 | static void | |
4009 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4010 | const char *func_name) | |
4011 | { | |
da51c347 DE |
4012 | struct mapped_index *index; |
4013 | ||
4014 | dw2_setup (objfile); | |
4015 | ||
4016 | index = dwarf2_per_objfile->index_table; | |
4017 | ||
4018 | /* index is NULL if OBJF_READNOW. */ | |
4019 | if (index) | |
4020 | { | |
4021 | struct dw2_symtab_iterator iter; | |
4022 | struct dwarf2_per_cu_data *per_cu; | |
4023 | ||
4024 | /* Note: It doesn't matter what we pass for block_index here. */ | |
4025 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
4026 | func_name); | |
4027 | ||
4028 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
4029 | dw2_instantiate_symtab (per_cu); | |
4030 | } | |
9291a0cd TT |
4031 | } |
4032 | ||
4033 | static void | |
4034 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4035 | { | |
4036 | int i; | |
4037 | ||
4038 | dw2_setup (objfile); | |
1fd400ff TT |
4039 | |
4040 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4041 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4042 | { |
8832e7e3 | 4043 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4044 | |
a0f42c21 | 4045 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4046 | } |
4047 | } | |
4048 | ||
4049 | static void | |
652a8996 JK |
4050 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4051 | const char *fullname) | |
9291a0cd TT |
4052 | { |
4053 | int i; | |
4054 | ||
4055 | dw2_setup (objfile); | |
d4637a04 DE |
4056 | |
4057 | /* We don't need to consider type units here. | |
4058 | This is only called for examining code, e.g. expand_line_sal. | |
4059 | There can be an order of magnitude (or more) more type units | |
4060 | than comp units, and we avoid them if we can. */ | |
4061 | ||
4062 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4063 | { |
4064 | int j; | |
8832e7e3 | 4065 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4066 | struct quick_file_names *file_data; |
9291a0cd | 4067 | |
3d7bb9d9 | 4068 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4069 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4070 | continue; |
4071 | ||
e4a48d9d | 4072 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4073 | if (file_data == NULL) |
9291a0cd TT |
4074 | continue; |
4075 | ||
7b9f3c50 | 4076 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4077 | { |
652a8996 JK |
4078 | const char *this_fullname = file_data->file_names[j]; |
4079 | ||
4080 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4081 | { |
a0f42c21 | 4082 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4083 | break; |
4084 | } | |
4085 | } | |
4086 | } | |
4087 | } | |
4088 | ||
9291a0cd | 4089 | static void |
ade7ed9e | 4090 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4091 | const char * name, domain_enum domain, |
ade7ed9e | 4092 | int global, |
40658b94 PH |
4093 | int (*callback) (struct block *, |
4094 | struct symbol *, void *), | |
b5ec771e | 4095 | void *data, symbol_name_match_type match, |
2edb89d3 | 4096 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4097 | { |
40658b94 | 4098 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4099 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4100 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4101 | } |
4102 | ||
b5ec771e PA |
4103 | /* Symbol name matcher for .gdb_index names. |
4104 | ||
4105 | Symbol names in .gdb_index have a few particularities: | |
4106 | ||
4107 | - There's no indication of which is the language of each symbol. | |
4108 | ||
4109 | Since each language has its own symbol name matching algorithm, | |
4110 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4111 | each symbol against all languages. This would be a potential |
4112 | performance problem if it were not mitigated by the | |
4113 | mapped_index::name_components lookup table, which significantly | |
4114 | reduces the number of times we need to call into this matcher, | |
4115 | making it a non-issue. | |
b5ec771e PA |
4116 | |
4117 | - Symbol names in the index have no overload (parameter) | |
4118 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4119 | appear as "foo" in the index, for example. | |
4120 | ||
4121 | This means that the lookup names passed to the symbol name | |
4122 | matcher functions must have no parameter information either | |
4123 | because (e.g.) symbol search name "foo" does not match | |
4124 | lookup-name "foo(int)" [while swapping search name for lookup | |
4125 | name would match]. | |
4126 | */ | |
4127 | class gdb_index_symbol_name_matcher | |
4128 | { | |
4129 | public: | |
4130 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4131 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4132 | ||
4133 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4134 | Returns true if any matcher matches. */ | |
4135 | bool matches (const char *symbol_name); | |
4136 | ||
4137 | private: | |
4138 | /* A reference to the lookup name we're matching against. */ | |
4139 | const lookup_name_info &m_lookup_name; | |
4140 | ||
4141 | /* A vector holding all the different symbol name matchers, for all | |
4142 | languages. */ | |
4143 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4144 | }; | |
4145 | ||
4146 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4147 | (const lookup_name_info &lookup_name) | |
4148 | : m_lookup_name (lookup_name) | |
4149 | { | |
4150 | /* Prepare the vector of comparison functions upfront, to avoid | |
4151 | doing the same work for each symbol. Care is taken to avoid | |
4152 | matching with the same matcher more than once if/when multiple | |
4153 | languages use the same matcher function. */ | |
4154 | auto &matchers = m_symbol_name_matcher_funcs; | |
4155 | matchers.reserve (nr_languages); | |
4156 | ||
4157 | matchers.push_back (default_symbol_name_matcher); | |
4158 | ||
4159 | for (int i = 0; i < nr_languages; i++) | |
4160 | { | |
4161 | const language_defn *lang = language_def ((enum language) i); | |
4162 | if (lang->la_get_symbol_name_matcher != NULL) | |
4163 | { | |
4164 | symbol_name_matcher_ftype *name_matcher | |
4165 | = lang->la_get_symbol_name_matcher (m_lookup_name); | |
4166 | ||
4167 | /* Don't insert the same comparison routine more than once. | |
4168 | Note that we do this linear walk instead of a cheaper | |
4169 | sorted insert, or use a std::set or something like that, | |
4170 | because relative order of function addresses is not | |
4171 | stable. This is not a problem in practice because the | |
4172 | number of supported languages is low, and the cost here | |
4173 | is tiny compared to the number of searches we'll do | |
4174 | afterwards using this object. */ | |
4175 | if (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4176 | == matchers.end ()) | |
4177 | matchers.push_back (name_matcher); | |
4178 | } | |
4179 | } | |
4180 | } | |
4181 | ||
4182 | bool | |
4183 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4184 | { | |
4185 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4186 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4187 | return true; | |
4188 | ||
4189 | return false; | |
4190 | } | |
4191 | ||
3f563c84 PA |
4192 | /* Helper for dw2_expand_symtabs_matching that works with a |
4193 | mapped_index instead of the containing objfile. This is split to a | |
4194 | separate function in order to be able to unit test the | |
4195 | name_components matching using a mock mapped_index. For each | |
4196 | symbol name that matches, calls MATCH_CALLBACK, passing it the | |
4197 | symbol's index in the mapped_index symbol table. */ | |
61d96d7e | 4198 | |
3f563c84 PA |
4199 | static void |
4200 | dw2_expand_symtabs_matching_symbol | |
4201 | (mapped_index &index, | |
c62446b1 | 4202 | const lookup_name_info &lookup_name_in, |
3f563c84 PA |
4203 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
4204 | enum search_domain kind, | |
4205 | gdb::function_view<void (offset_type)> match_callback) | |
4206 | { | |
c62446b1 PA |
4207 | lookup_name_info lookup_name_without_params |
4208 | = lookup_name_in.make_ignore_params (); | |
3f563c84 | 4209 | gdb_index_symbol_name_matcher lookup_name_matcher |
c62446b1 | 4210 | (lookup_name_without_params); |
3f563c84 PA |
4211 | |
4212 | auto *name_cmp = case_sensitivity == case_sensitive_on ? strcmp : strcasecmp; | |
4213 | ||
4214 | /* Build the symbol name component sorted vector, if we haven't yet. | |
4215 | The code below only knows how to break apart components of C++ | |
4216 | symbol names (and other languages that use '::' as | |
4217 | namespace/module separator). If we add support for wild matching | |
4218 | to some language that uses some other operator (E.g., Ada, Go and | |
4219 | D use '.'), then we'll need to try splitting the symbol name | |
4220 | according to that language too. Note that Ada does support wild | |
4221 | matching, but doesn't currently support .gdb_index. */ | |
4222 | if (index.name_components.empty ()) | |
4223 | { | |
4224 | for (size_t iter = 0; iter < index.symbol_table_slots; ++iter) | |
4225 | { | |
4226 | offset_type idx = 2 * iter; | |
4227 | ||
4228 | if (index.symbol_table[idx] == 0 | |
4229 | && index.symbol_table[idx + 1] == 0) | |
4230 | continue; | |
4231 | ||
4232 | const char *name = index.symbol_name_at (idx); | |
4233 | ||
4234 | /* Add each name component to the name component table. */ | |
4235 | unsigned int previous_len = 0; | |
4236 | for (unsigned int current_len = cp_find_first_component (name); | |
4237 | name[current_len] != '\0'; | |
4238 | current_len += cp_find_first_component (name + current_len)) | |
4239 | { | |
4240 | gdb_assert (name[current_len] == ':'); | |
4241 | index.name_components.push_back ({previous_len, idx}); | |
4242 | /* Skip the '::'. */ | |
4243 | current_len += 2; | |
4244 | previous_len = current_len; | |
4245 | } | |
4246 | index.name_components.push_back ({previous_len, idx}); | |
4247 | } | |
9291a0cd | 4248 | |
3f563c84 PA |
4249 | /* Sort name_components elements by name. */ |
4250 | auto name_comp_compare = [&] (const name_component &left, | |
4251 | const name_component &right) | |
4252 | { | |
4253 | const char *left_qualified = index.symbol_name_at (left.idx); | |
4254 | const char *right_qualified = index.symbol_name_at (right.idx); | |
4255 | ||
4256 | const char *left_name = left_qualified + left.name_offset; | |
4257 | const char *right_name = right_qualified + right.name_offset; | |
4258 | ||
4259 | return name_cmp (left_name, right_name) < 0; | |
4260 | }; | |
4261 | ||
4262 | std::sort (index.name_components.begin (), | |
4263 | index.name_components.end (), | |
4264 | name_comp_compare); | |
4265 | } | |
4266 | ||
4267 | const char *cplus | |
c62446b1 | 4268 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4269 | |
3f563c84 PA |
4270 | /* Comparison function object for lower_bound that matches against a |
4271 | given symbol name. */ | |
4272 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4273 | const char *name) | |
4274 | { | |
4275 | const char *elem_qualified = index.symbol_name_at (elem.idx); | |
4276 | const char *elem_name = elem_qualified + elem.name_offset; | |
4277 | return name_cmp (elem_name, name) < 0; | |
4278 | }; | |
4279 | ||
4280 | /* Comparison function object for upper_bound that matches against a | |
4281 | given symbol name. */ | |
4282 | auto lookup_compare_upper = [&] (const char *name, | |
4283 | const name_component &elem) | |
4284 | { | |
4285 | const char *elem_qualified = index.symbol_name_at (elem.idx); | |
4286 | const char *elem_name = elem_qualified + elem.name_offset; | |
4287 | return name_cmp (name, elem_name) < 0; | |
4288 | }; | |
4289 | ||
4290 | auto begin = index.name_components.begin (); | |
4291 | auto end = index.name_components.end (); | |
4292 | ||
4293 | /* Find the lower bound. */ | |
4294 | auto lower = [&] () | |
4295 | { | |
c62446b1 | 4296 | if (lookup_name_in.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4297 | return begin; |
4298 | else | |
4299 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4300 | } (); | |
4301 | ||
4302 | /* Find the upper bound. */ | |
4303 | auto upper = [&] () | |
4304 | { | |
c62446b1 | 4305 | if (lookup_name_in.completion_mode ()) |
3f563c84 PA |
4306 | { |
4307 | /* The string frobbing below won't work if the string is | |
4308 | empty. We don't need it then, anyway -- if we're | |
4309 | completing an empty string, then we want to iterate over | |
4310 | the whole range. */ | |
4311 | if (cplus[0] == '\0') | |
4312 | return end; | |
4313 | ||
4314 | /* In completion mode, increment the last character because | |
4315 | we want UPPER to point past all symbols names that have | |
4316 | the same prefix. */ | |
4317 | std::string after = cplus; | |
4318 | ||
4319 | gdb_assert (after.back () != 0xff); | |
4320 | after.back ()++; | |
4321 | ||
4322 | return std::upper_bound (lower, end, after.c_str (), | |
4323 | lookup_compare_upper); | |
4324 | } | |
4325 | else | |
4326 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4327 | } (); | |
4328 | ||
4329 | /* Now for each symbol name in range, check to see if we have a name | |
4330 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4331 | ||
4332 | /* The same symbol may appear more than once in the range though. | |
4333 | E.g., if we're looking for symbols that complete "w", and we have | |
4334 | a symbol named "w1::w2", we'll find the two name components for | |
4335 | that same symbol in the range. To be sure we only call the | |
4336 | callback once per symbol, we first collect the symbol name | |
4337 | indexes that matched in a temporary vector and ignore | |
4338 | duplicates. */ | |
4339 | std::vector<offset_type> matches; | |
4340 | matches.reserve (std::distance (lower, upper)); | |
4341 | ||
4342 | for (;lower != upper; ++lower) | |
4343 | { | |
4344 | const char *qualified = index.symbol_name_at (lower->idx); | |
4345 | ||
4346 | if (!lookup_name_matcher.matches (qualified) | |
4347 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4348 | continue; |
4349 | ||
3f563c84 PA |
4350 | matches.push_back (lower->idx); |
4351 | } | |
4352 | ||
4353 | std::sort (matches.begin (), matches.end ()); | |
4354 | ||
4355 | /* Finally call the callback, once per match. */ | |
4356 | ULONGEST prev = -1; | |
4357 | for (offset_type idx : matches) | |
4358 | { | |
4359 | if (prev != idx) | |
4360 | { | |
4361 | match_callback (idx); | |
4362 | prev = idx; | |
4363 | } | |
4364 | } | |
4365 | ||
4366 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4367 | (offset_type)-1 are both possible values. */ | |
4368 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4369 | } | |
4370 | ||
c62446b1 PA |
4371 | #if GDB_SELF_TEST |
4372 | ||
4373 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4374 | ||
4375 | /* A wrapper around mapped_index that builds a mock mapped_index, from | |
4376 | the symbol list passed as parameter to the constructor. */ | |
4377 | class mock_mapped_index | |
4378 | { | |
4379 | public: | |
4380 | template<size_t N> | |
4381 | mock_mapped_index (const char *(&symbols)[N]) | |
4382 | : mock_mapped_index (symbols, N) | |
4383 | {} | |
4384 | ||
4385 | /* Access the built index. */ | |
4386 | mapped_index &index () | |
4387 | { return m_index; } | |
4388 | ||
4389 | /* Disable copy. */ | |
4390 | mock_mapped_index(const mock_mapped_index &) = delete; | |
4391 | void operator= (const mock_mapped_index &) = delete; | |
4392 | ||
4393 | private: | |
4394 | mock_mapped_index (const char **symbols, size_t symbols_size) | |
4395 | { | |
4396 | /* No string can live at offset zero. Add a dummy entry. */ | |
4397 | obstack_grow_str0 (&m_constant_pool, ""); | |
4398 | ||
4399 | for (size_t i = 0; i < symbols_size; i++) | |
4400 | { | |
4401 | const char *sym = symbols[i]; | |
4402 | size_t offset = obstack_object_size (&m_constant_pool); | |
4403 | obstack_grow_str0 (&m_constant_pool, sym); | |
4404 | m_symbol_table.push_back (offset); | |
4405 | m_symbol_table.push_back (0); | |
4406 | }; | |
4407 | ||
4408 | m_index.constant_pool = (const char *) obstack_base (&m_constant_pool); | |
4409 | m_index.symbol_table = m_symbol_table.data (); | |
4410 | m_index.symbol_table_slots = m_symbol_table.size () / 2; | |
4411 | } | |
4412 | ||
4413 | public: | |
4414 | /* The built mapped_index. */ | |
4415 | mapped_index m_index{}; | |
4416 | ||
4417 | /* The storage that the built mapped_index uses for symbol and | |
4418 | constant pool tables. */ | |
4419 | std::vector<offset_type> m_symbol_table; | |
4420 | auto_obstack m_constant_pool; | |
4421 | }; | |
4422 | ||
4423 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4424 | string, to pass to print routines. */ | |
4425 | ||
4426 | static const char * | |
4427 | string_or_null (const char *str) | |
4428 | { | |
4429 | return str != NULL ? str : "<null>"; | |
4430 | } | |
4431 | ||
4432 | /* Check if a lookup_name_info built from | |
4433 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4434 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4435 | matching order. If no match expected, then an empty list is | |
4436 | specified. Returns true on success. On failure prints a warning | |
4437 | indicating the file:line that failed, and returns false. */ | |
4438 | ||
4439 | static bool | |
4440 | check_match (const char *file, int line, | |
4441 | mock_mapped_index &mock_index, | |
4442 | const char *name, symbol_name_match_type match_type, | |
4443 | bool completion_mode, | |
4444 | std::initializer_list<const char *> expected_list) | |
4445 | { | |
4446 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4447 | ||
4448 | bool matched = true; | |
4449 | ||
4450 | auto mismatch = [&] (const char *expected_str, | |
4451 | const char *got) | |
4452 | { | |
4453 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4454 | "expected=\"%s\", got=\"%s\"\n"), | |
4455 | file, line, | |
4456 | (match_type == symbol_name_match_type::FULL | |
4457 | ? "FULL" : "WILD"), | |
4458 | name, string_or_null (expected_str), string_or_null (got)); | |
4459 | matched = false; | |
4460 | }; | |
4461 | ||
4462 | auto expected_it = expected_list.begin (); | |
4463 | auto expected_end = expected_list.end (); | |
4464 | ||
4465 | dw2_expand_symtabs_matching_symbol (mock_index.index (), lookup_name, | |
4466 | NULL, ALL_DOMAIN, | |
4467 | [&] (offset_type idx) | |
4468 | { | |
4469 | const char *matched_name = mock_index.index ().symbol_name_at (idx); | |
4470 | const char *expected_str | |
4471 | = expected_it == expected_end ? NULL : *expected_it++; | |
4472 | ||
4473 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4474 | mismatch (expected_str, matched_name); | |
4475 | }); | |
4476 | ||
4477 | const char *expected_str | |
4478 | = expected_it == expected_end ? NULL : *expected_it++; | |
4479 | if (expected_str != NULL) | |
4480 | mismatch (expected_str, NULL); | |
4481 | ||
4482 | return matched; | |
4483 | } | |
4484 | ||
4485 | /* The symbols added to the mock mapped_index for testing (in | |
4486 | canonical form). */ | |
4487 | static const char *test_symbols[] = { | |
4488 | "function", | |
4489 | "std::bar", | |
4490 | "std::zfunction", | |
4491 | "std::zfunction2", | |
4492 | "w1::w2", | |
4493 | "ns::foo<char*>", | |
4494 | "ns::foo<int>", | |
4495 | "ns::foo<long>", | |
4496 | ||
4497 | /* A name with all sorts of complications. Starts with "z" to make | |
4498 | it easier for the completion tests below. */ | |
4499 | #define Z_SYM_NAME \ | |
4500 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4501 | "::tuple<(anonymous namespace)::ui*, " \ | |
4502 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4503 | ||
4504 | Z_SYM_NAME | |
4505 | }; | |
4506 | ||
4507 | static void | |
4508 | run_test () | |
4509 | { | |
4510 | mock_mapped_index mock_index (test_symbols); | |
4511 | ||
4512 | /* We let all tests run until the end even if some fails, for debug | |
4513 | convenience. */ | |
4514 | bool any_mismatch = false; | |
4515 | ||
4516 | /* Create the expected symbols list (an initializer_list). Needed | |
4517 | because lists have commas, and we need to pass them to CHECK, | |
4518 | which is a macro. */ | |
4519 | #define EXPECT(...) { __VA_ARGS__ } | |
4520 | ||
4521 | /* Wrapper for check_match that passes down the current | |
4522 | __FILE__/__LINE__. */ | |
4523 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4524 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4525 | mock_index, \ | |
4526 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4527 | EXPECTED_LIST) | |
4528 | ||
4529 | /* Identity checks. */ | |
4530 | for (const char *sym : test_symbols) | |
4531 | { | |
4532 | /* Should be able to match all existing symbols. */ | |
4533 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4534 | EXPECT (sym)); | |
4535 | ||
4536 | /* Should be able to match all existing symbols with | |
4537 | parameters. */ | |
4538 | std::string with_params = std::string (sym) + "(int)"; | |
4539 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4540 | EXPECT (sym)); | |
4541 | ||
4542 | /* Should be able to match all existing symbols with | |
4543 | parameters and qualifiers. */ | |
4544 | with_params = std::string (sym) + " ( int ) const"; | |
4545 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4546 | EXPECT (sym)); | |
4547 | ||
4548 | /* This should really find sym, but cp-name-parser.y doesn't | |
4549 | know about lvalue/rvalue qualifiers yet. */ | |
4550 | with_params = std::string (sym) + " ( int ) &&"; | |
4551 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4552 | {}); | |
4553 | } | |
4554 | ||
4555 | /* Check that completion mode works at each prefix of the expected | |
4556 | symbol name. */ | |
4557 | { | |
4558 | static const char str[] = "function(int)"; | |
4559 | size_t len = strlen (str); | |
4560 | std::string lookup; | |
4561 | ||
4562 | for (size_t i = 1; i < len; i++) | |
4563 | { | |
4564 | lookup.assign (str, i); | |
4565 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4566 | EXPECT ("function")); | |
4567 | } | |
4568 | } | |
4569 | ||
4570 | /* While "w" is a prefix of both components, the match function | |
4571 | should still only be called once. */ | |
4572 | { | |
4573 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4574 | EXPECT ("w1::w2")); | |
4575 | } | |
4576 | ||
4577 | /* Same, with a "complicated" symbol. */ | |
4578 | { | |
4579 | static const char str[] = Z_SYM_NAME; | |
4580 | size_t len = strlen (str); | |
4581 | std::string lookup; | |
4582 | ||
4583 | for (size_t i = 1; i < len; i++) | |
4584 | { | |
4585 | lookup.assign (str, i); | |
4586 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4587 | EXPECT (Z_SYM_NAME)); | |
4588 | } | |
4589 | } | |
4590 | ||
4591 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4592 | { | |
4593 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4594 | {}); | |
4595 | } | |
4596 | ||
4597 | /* A complete symbol with parameters matches any overload, since the | |
4598 | index has no overload info. */ | |
4599 | { | |
4600 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4601 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4602 | } | |
4603 | ||
4604 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4605 | template argument list. */ | |
4606 | { | |
4607 | static const char expected[] = "ns::foo<int>"; | |
4608 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4609 | EXPECT (expected)); | |
4610 | } | |
4611 | ||
4612 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4613 | template argument list that includes a pointer. */ | |
4614 | { | |
4615 | static const char expected[] = "ns::foo<char*>"; | |
4616 | /* Try both completion and non-completion modes. */ | |
4617 | static const bool completion_mode[2] = {false, true}; | |
4618 | for (size_t i = 0; i < 2; i++) | |
4619 | { | |
4620 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4621 | completion_mode[i], EXPECT (expected)); | |
4622 | ||
4623 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4624 | completion_mode[i], EXPECT (expected)); | |
4625 | } | |
4626 | } | |
4627 | ||
4628 | { | |
4629 | /* Check method qualifiers are ignored. */ | |
4630 | static const char expected[] = "ns::foo<char*>"; | |
4631 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4632 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4633 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4634 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4635 | } | |
4636 | ||
4637 | /* Test lookup names that don't match anything. */ | |
4638 | { | |
4639 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, | |
4640 | {}); | |
4641 | } | |
4642 | ||
4643 | SELF_CHECK (!any_mismatch); | |
4644 | ||
4645 | #undef EXPECT | |
4646 | #undef CHECK_MATCH | |
4647 | } | |
4648 | ||
4649 | }} // namespace selftests::dw2_expand_symtabs_matching | |
4650 | ||
4651 | #endif /* GDB_SELF_TEST */ | |
4652 | ||
3f563c84 PA |
4653 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4654 | matched, to expand corresponding CUs that were marked. IDX is the | |
4655 | index of the symbol name that matched. */ | |
4656 | ||
4657 | static void | |
4658 | dw2_expand_marked_cus | |
4659 | (mapped_index &index, offset_type idx, | |
4660 | struct objfile *objfile, | |
4661 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4662 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4663 | search_domain kind) | |
4664 | { | |
4665 | const char *name; | |
4666 | offset_type *vec, vec_len, vec_idx; | |
4667 | bool global_seen = false; | |
4668 | ||
61920122 PA |
4669 | vec = (offset_type *) (index.constant_pool |
4670 | + MAYBE_SWAP (index.symbol_table[idx + 1])); | |
4671 | vec_len = MAYBE_SWAP (vec[0]); | |
4672 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4673 | { | |
4674 | struct dwarf2_per_cu_data *per_cu; | |
4675 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); | |
4676 | /* This value is only valid for index versions >= 7. */ | |
4677 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4678 | gdb_index_symbol_kind symbol_kind = | |
4679 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4680 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4681 | /* Only check the symbol attributes if they're present. | |
4682 | Indices prior to version 7 don't record them, | |
4683 | and indices >= 7 may elide them for certain symbols | |
4684 | (gold does this). */ | |
4685 | int attrs_valid = | |
4686 | (index.version >= 7 | |
4687 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4688 | ||
4689 | /* Work around gold/15646. */ | |
4690 | if (attrs_valid) | |
9291a0cd | 4691 | { |
61920122 PA |
4692 | if (!is_static && global_seen) |
4693 | continue; | |
4694 | if (!is_static) | |
4695 | global_seen = true; | |
4696 | } | |
3190f0c6 | 4697 | |
61920122 PA |
4698 | /* Only check the symbol's kind if it has one. */ |
4699 | if (attrs_valid) | |
4700 | { | |
4701 | switch (kind) | |
8943b874 | 4702 | { |
61920122 PA |
4703 | case VARIABLES_DOMAIN: |
4704 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4705 | continue; | |
4706 | break; | |
4707 | case FUNCTIONS_DOMAIN: | |
4708 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4709 | continue; |
61920122 PA |
4710 | break; |
4711 | case TYPES_DOMAIN: | |
4712 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4713 | continue; | |
4714 | break; | |
4715 | default: | |
4716 | break; | |
8943b874 | 4717 | } |
61920122 | 4718 | } |
8943b874 | 4719 | |
61920122 PA |
4720 | /* Don't crash on bad data. */ |
4721 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4722 | + dwarf2_per_objfile->n_type_units)) | |
4723 | { | |
4724 | complaint (&symfile_complaints, | |
4725 | _(".gdb_index entry has bad CU index" | |
4726 | " [in module %s]"), objfile_name (objfile)); | |
4727 | continue; | |
4728 | } | |
4729 | ||
4730 | per_cu = dw2_get_cutu (cu_index); | |
4731 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4732 | { | |
4733 | int symtab_was_null = | |
4734 | (per_cu->v.quick->compunit_symtab == NULL); | |
4735 | ||
4736 | dw2_instantiate_symtab (per_cu); | |
4737 | ||
4738 | if (expansion_notify != NULL | |
4739 | && symtab_was_null | |
4740 | && per_cu->v.quick->compunit_symtab != NULL) | |
4741 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4742 | } | |
4743 | } | |
4744 | } | |
4745 | ||
4746 | static void | |
4747 | dw2_expand_symtabs_matching | |
4748 | (struct objfile *objfile, | |
4749 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4750 | const lookup_name_info &lookup_name, | |
4751 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4752 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4753 | enum search_domain kind) | |
4754 | { | |
4755 | int i; | |
4756 | offset_type iter; | |
4757 | ||
4758 | dw2_setup (objfile); | |
4759 | ||
4760 | /* index_table is NULL if OBJF_READNOW. */ | |
4761 | if (!dwarf2_per_objfile->index_table) | |
4762 | return; | |
4763 | ||
4764 | if (file_matcher != NULL) | |
4765 | { | |
4766 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
4767 | htab_eq_pointer, | |
4768 | NULL, xcalloc, xfree)); | |
4769 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
4770 | htab_eq_pointer, | |
4771 | NULL, xcalloc, xfree)); | |
4772 | ||
4773 | /* The rule is CUs specify all the files, including those used by | |
4774 | any TU, so there's no need to scan TUs here. */ | |
4775 | ||
4776 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
4777 | { | |
4778 | int j; | |
4779 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4780 | struct quick_file_names *file_data; | |
4781 | void **slot; | |
4782 | ||
4783 | QUIT; | |
4784 | ||
4785 | per_cu->v.quick->mark = 0; | |
156942c7 | 4786 | |
61920122 PA |
4787 | /* We only need to look at symtabs not already expanded. */ |
4788 | if (per_cu->v.quick->compunit_symtab) | |
4789 | continue; | |
4790 | ||
4791 | file_data = dw2_get_file_names (per_cu); | |
4792 | if (file_data == NULL) | |
4793 | continue; | |
4794 | ||
4795 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4796 | continue; | |
4797 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
3190f0c6 | 4798 | { |
61920122 | 4799 | per_cu->v.quick->mark = 1; |
3190f0c6 DE |
4800 | continue; |
4801 | } | |
4802 | ||
61920122 | 4803 | for (j = 0; j < file_data->num_file_names; ++j) |
276d885b | 4804 | { |
61920122 | 4805 | const char *this_real_name; |
276d885b | 4806 | |
61920122 PA |
4807 | if (file_matcher (file_data->file_names[j], false)) |
4808 | { | |
4809 | per_cu->v.quick->mark = 1; | |
4810 | break; | |
4811 | } | |
4812 | ||
4813 | /* Before we invoke realpath, which can get expensive when many | |
4814 | files are involved, do a quick comparison of the basenames. */ | |
4815 | if (!basenames_may_differ | |
4816 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4817 | true)) | |
4818 | continue; | |
276d885b | 4819 | |
61920122 PA |
4820 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
4821 | if (file_matcher (this_real_name, false)) | |
276d885b | 4822 | { |
61920122 PA |
4823 | per_cu->v.quick->mark = 1; |
4824 | break; | |
276d885b GB |
4825 | } |
4826 | } | |
61920122 PA |
4827 | |
4828 | slot = htab_find_slot (per_cu->v.quick->mark | |
4829 | ? visited_found.get () | |
4830 | : visited_not_found.get (), | |
4831 | file_data, INSERT); | |
4832 | *slot = file_data; | |
9291a0cd | 4833 | } |
61920122 PA |
4834 | } |
4835 | ||
4836 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
4837 | ||
4838 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
4839 | symbol_matcher, | |
4840 | kind, [&] (offset_type idx) | |
4841 | { | |
4842 | dw2_expand_marked_cus (index, idx, objfile, file_matcher, | |
4843 | expansion_notify, kind); | |
4844 | }); | |
9291a0cd TT |
4845 | } |
4846 | ||
43f3e411 | 4847 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4848 | symtab. */ |
4849 | ||
43f3e411 DE |
4850 | static struct compunit_symtab * |
4851 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4852 | CORE_ADDR pc) | |
9703b513 TT |
4853 | { |
4854 | int i; | |
4855 | ||
43f3e411 DE |
4856 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4857 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4858 | return cust; | |
9703b513 | 4859 | |
43f3e411 | 4860 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4861 | return NULL; |
4862 | ||
43f3e411 | 4863 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4864 | { |
43f3e411 | 4865 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4866 | |
43f3e411 | 4867 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4868 | if (s != NULL) |
4869 | return s; | |
4870 | } | |
4871 | ||
4872 | return NULL; | |
4873 | } | |
4874 | ||
43f3e411 DE |
4875 | static struct compunit_symtab * |
4876 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4877 | struct bound_minimal_symbol msymbol, | |
4878 | CORE_ADDR pc, | |
4879 | struct obj_section *section, | |
4880 | int warn_if_readin) | |
9291a0cd TT |
4881 | { |
4882 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4883 | struct compunit_symtab *result; |
9291a0cd TT |
4884 | |
4885 | dw2_setup (objfile); | |
4886 | ||
4887 | if (!objfile->psymtabs_addrmap) | |
4888 | return NULL; | |
4889 | ||
9a3c8263 SM |
4890 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4891 | pc); | |
9291a0cd TT |
4892 | if (!data) |
4893 | return NULL; | |
4894 | ||
43f3e411 | 4895 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4896 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4897 | paddress (get_objfile_arch (objfile), pc)); |
4898 | ||
43f3e411 DE |
4899 | result |
4900 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4901 | pc); | |
9703b513 TT |
4902 | gdb_assert (result != NULL); |
4903 | return result; | |
9291a0cd TT |
4904 | } |
4905 | ||
9291a0cd | 4906 | static void |
44b13c5a | 4907 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4908 | void *data, int need_fullname) |
9291a0cd | 4909 | { |
9291a0cd | 4910 | dw2_setup (objfile); |
ae2de4f8 | 4911 | |
bbf2f4df | 4912 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 4913 | { |
bbf2f4df | 4914 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 4915 | |
bbf2f4df PA |
4916 | htab_up visited (htab_create_alloc (10, |
4917 | htab_hash_pointer, htab_eq_pointer, | |
4918 | NULL, xcalloc, xfree)); | |
24c79950 | 4919 | |
bbf2f4df PA |
4920 | /* The rule is CUs specify all the files, including those used |
4921 | by any TU, so there's no need to scan TUs here. We can | |
4922 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 4923 | |
bbf2f4df PA |
4924 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
4925 | { | |
4926 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 4927 | |
bbf2f4df PA |
4928 | if (per_cu->v.quick->compunit_symtab) |
4929 | { | |
4930 | void **slot = htab_find_slot (visited.get (), | |
4931 | per_cu->v.quick->file_names, | |
4932 | INSERT); | |
9291a0cd | 4933 | |
bbf2f4df PA |
4934 | *slot = per_cu->v.quick->file_names; |
4935 | } | |
24c79950 | 4936 | } |
24c79950 | 4937 | |
bbf2f4df | 4938 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 4939 | { |
bbf2f4df PA |
4940 | int j; |
4941 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4942 | struct quick_file_names *file_data; | |
4943 | void **slot; | |
4944 | ||
4945 | /* We only need to look at symtabs not already expanded. */ | |
4946 | if (per_cu->v.quick->compunit_symtab) | |
4947 | continue; | |
74e2f255 | 4948 | |
bbf2f4df PA |
4949 | file_data = dw2_get_file_names (per_cu); |
4950 | if (file_data == NULL) | |
4951 | continue; | |
4952 | ||
4953 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
4954 | if (*slot) | |
4955 | { | |
4956 | /* Already visited. */ | |
4957 | continue; | |
4958 | } | |
4959 | *slot = file_data; | |
4960 | ||
4961 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4962 | { | |
4963 | const char *filename = file_data->file_names[j]; | |
4964 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4965 | } | |
9291a0cd TT |
4966 | } |
4967 | } | |
bbf2f4df PA |
4968 | |
4969 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4970 | { | |
14278e1f | 4971 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
4972 | |
4973 | if (need_fullname) | |
4974 | this_real_name = gdb_realpath (filename); | |
14278e1f | 4975 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 4976 | }); |
9291a0cd TT |
4977 | } |
4978 | ||
4979 | static int | |
4980 | dw2_has_symbols (struct objfile *objfile) | |
4981 | { | |
4982 | return 1; | |
4983 | } | |
4984 | ||
4985 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4986 | { | |
4987 | dw2_has_symbols, | |
4988 | dw2_find_last_source_symtab, | |
4989 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4990 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4991 | dw2_lookup_symbol, |
9291a0cd TT |
4992 | dw2_print_stats, |
4993 | dw2_dump, | |
4994 | dw2_relocate, | |
4995 | dw2_expand_symtabs_for_function, | |
4996 | dw2_expand_all_symtabs, | |
652a8996 | 4997 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4998 | dw2_map_matching_symbols, |
9291a0cd | 4999 | dw2_expand_symtabs_matching, |
43f3e411 | 5000 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
5001 | dw2_map_symbol_filenames |
5002 | }; | |
5003 | ||
5004 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
5005 | file will use psymtabs, or 1 if using the GNU index. */ | |
5006 | ||
5007 | int | |
5008 | dwarf2_initialize_objfile (struct objfile *objfile) | |
5009 | { | |
5010 | /* If we're about to read full symbols, don't bother with the | |
5011 | indices. In this case we also don't care if some other debug | |
5012 | format is making psymtabs, because they are all about to be | |
5013 | expanded anyway. */ | |
5014 | if ((objfile->flags & OBJF_READNOW)) | |
5015 | { | |
5016 | int i; | |
5017 | ||
5018 | dwarf2_per_objfile->using_index = 1; | |
5019 | create_all_comp_units (objfile); | |
0e50663e | 5020 | create_all_type_units (objfile); |
7b9f3c50 DE |
5021 | dwarf2_per_objfile->quick_file_names_table = |
5022 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 5023 | |
1fd400ff | 5024 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 5025 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 5026 | { |
8832e7e3 | 5027 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 5028 | |
e254ef6a DE |
5029 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5030 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5031 | } |
5032 | ||
5033 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5034 | these functions will be no-ops because we will have expanded | |
5035 | all symtabs. */ | |
5036 | return 1; | |
5037 | } | |
5038 | ||
5039 | if (dwarf2_read_index (objfile)) | |
5040 | return 1; | |
5041 | ||
9291a0cd TT |
5042 | return 0; |
5043 | } | |
5044 | ||
5045 | \f | |
5046 | ||
dce234bc PP |
5047 | /* Build a partial symbol table. */ |
5048 | ||
5049 | void | |
f29dff0a | 5050 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5051 | { |
c9bf0622 | 5052 | |
af5bf4ad SM |
5053 | if (objfile->global_psymbols.capacity () == 0 |
5054 | && objfile->static_psymbols.capacity () == 0) | |
5055 | init_psymbol_list (objfile, 1024); | |
c906108c | 5056 | |
492d29ea | 5057 | TRY |
c9bf0622 TT |
5058 | { |
5059 | /* This isn't really ideal: all the data we allocate on the | |
5060 | objfile's obstack is still uselessly kept around. However, | |
5061 | freeing it seems unsafe. */ | |
906768f9 | 5062 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 5063 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 5064 | psymtabs.keep (); |
c9bf0622 | 5065 | } |
492d29ea PA |
5066 | CATCH (except, RETURN_MASK_ERROR) |
5067 | { | |
5068 | exception_print (gdb_stderr, except); | |
5069 | } | |
5070 | END_CATCH | |
c906108c | 5071 | } |
c906108c | 5072 | |
1ce1cefd DE |
5073 | /* Return the total length of the CU described by HEADER. */ |
5074 | ||
5075 | static unsigned int | |
5076 | get_cu_length (const struct comp_unit_head *header) | |
5077 | { | |
5078 | return header->initial_length_size + header->length; | |
5079 | } | |
5080 | ||
9c541725 | 5081 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 5082 | |
9c541725 PA |
5083 | static inline bool |
5084 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 5085 | { |
9c541725 PA |
5086 | sect_offset bottom = cu_header->sect_off; |
5087 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 5088 | |
9c541725 | 5089 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
5090 | } |
5091 | ||
3b80fe9b DE |
5092 | /* Find the base address of the compilation unit for range lists and |
5093 | location lists. It will normally be specified by DW_AT_low_pc. | |
5094 | In DWARF-3 draft 4, the base address could be overridden by | |
5095 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5096 | compilation units with discontinuous ranges. */ | |
5097 | ||
5098 | static void | |
5099 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5100 | { | |
5101 | struct attribute *attr; | |
5102 | ||
5103 | cu->base_known = 0; | |
5104 | cu->base_address = 0; | |
5105 | ||
5106 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
5107 | if (attr) | |
5108 | { | |
31aa7e4e | 5109 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5110 | cu->base_known = 1; |
5111 | } | |
5112 | else | |
5113 | { | |
5114 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
5115 | if (attr) | |
5116 | { | |
31aa7e4e | 5117 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5118 | cu->base_known = 1; |
5119 | } | |
5120 | } | |
5121 | } | |
5122 | ||
93311388 | 5123 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 5124 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
5125 | NOTE: This leaves members offset, first_die_offset to be filled in |
5126 | by the caller. */ | |
107d2387 | 5127 | |
d521ce57 | 5128 | static const gdb_byte * |
107d2387 | 5129 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
5130 | const gdb_byte *info_ptr, |
5131 | struct dwarf2_section_info *section, | |
5132 | rcuh_kind section_kind) | |
107d2387 AC |
5133 | { |
5134 | int signed_addr; | |
891d2f0b | 5135 | unsigned int bytes_read; |
43988095 JK |
5136 | const char *filename = get_section_file_name (section); |
5137 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
5138 | |
5139 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
5140 | cu_header->initial_length_size = bytes_read; | |
5141 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 5142 | info_ptr += bytes_read; |
107d2387 AC |
5143 | cu_header->version = read_2_bytes (abfd, info_ptr); |
5144 | info_ptr += 2; | |
43988095 JK |
5145 | if (cu_header->version < 5) |
5146 | switch (section_kind) | |
5147 | { | |
5148 | case rcuh_kind::COMPILE: | |
5149 | cu_header->unit_type = DW_UT_compile; | |
5150 | break; | |
5151 | case rcuh_kind::TYPE: | |
5152 | cu_header->unit_type = DW_UT_type; | |
5153 | break; | |
5154 | default: | |
5155 | internal_error (__FILE__, __LINE__, | |
5156 | _("read_comp_unit_head: invalid section_kind")); | |
5157 | } | |
5158 | else | |
5159 | { | |
5160 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
5161 | (read_1_byte (abfd, info_ptr)); | |
5162 | info_ptr += 1; | |
5163 | switch (cu_header->unit_type) | |
5164 | { | |
5165 | case DW_UT_compile: | |
5166 | if (section_kind != rcuh_kind::COMPILE) | |
5167 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5168 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
5169 | filename); | |
5170 | break; | |
5171 | case DW_UT_type: | |
5172 | section_kind = rcuh_kind::TYPE; | |
5173 | break; | |
5174 | default: | |
5175 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5176 | "(is %d, should be %d or %d) [in module %s]"), | |
5177 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
5178 | } | |
5179 | ||
5180 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5181 | info_ptr += 1; | |
5182 | } | |
9c541725 PA |
5183 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
5184 | cu_header, | |
5185 | &bytes_read); | |
613e1657 | 5186 | info_ptr += bytes_read; |
43988095 JK |
5187 | if (cu_header->version < 5) |
5188 | { | |
5189 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5190 | info_ptr += 1; | |
5191 | } | |
107d2387 AC |
5192 | signed_addr = bfd_get_sign_extend_vma (abfd); |
5193 | if (signed_addr < 0) | |
8e65ff28 | 5194 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 5195 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 5196 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 5197 | |
43988095 JK |
5198 | if (section_kind == rcuh_kind::TYPE) |
5199 | { | |
5200 | LONGEST type_offset; | |
5201 | ||
5202 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
5203 | info_ptr += 8; | |
5204 | ||
5205 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
5206 | info_ptr += bytes_read; | |
9c541725 PA |
5207 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
5208 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
5209 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
5210 | "header (is %s) [in module %s]"), plongest (type_offset), | |
5211 | filename); | |
5212 | } | |
5213 | ||
107d2387 AC |
5214 | return info_ptr; |
5215 | } | |
5216 | ||
36586728 TT |
5217 | /* Helper function that returns the proper abbrev section for |
5218 | THIS_CU. */ | |
5219 | ||
5220 | static struct dwarf2_section_info * | |
5221 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5222 | { | |
5223 | struct dwarf2_section_info *abbrev; | |
5224 | ||
5225 | if (this_cu->is_dwz) | |
5226 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
5227 | else | |
5228 | abbrev = &dwarf2_per_objfile->abbrev; | |
5229 | ||
5230 | return abbrev; | |
5231 | } | |
5232 | ||
9ff913ba DE |
5233 | /* Subroutine of read_and_check_comp_unit_head and |
5234 | read_and_check_type_unit_head to simplify them. | |
5235 | Perform various error checking on the header. */ | |
5236 | ||
5237 | static void | |
5238 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
5239 | struct dwarf2_section_info *section, |
5240 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 5241 | { |
a32a8923 | 5242 | const char *filename = get_section_file_name (section); |
9ff913ba | 5243 | |
43988095 | 5244 | if (header->version < 2 || header->version > 5) |
9ff913ba | 5245 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 5246 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
5247 | filename); |
5248 | ||
9c541725 | 5249 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 5250 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
5251 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
5252 | "(offset 0x%x + 6) [in module %s]"), | |
5253 | to_underlying (header->abbrev_sect_off), | |
5254 | to_underlying (header->sect_off), | |
9ff913ba DE |
5255 | filename); |
5256 | ||
9c541725 | 5257 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 5258 | avoid potential 32-bit overflow. */ |
9c541725 | 5259 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 5260 | > section->size) |
9c541725 PA |
5261 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
5262 | "(offset 0x%x + 0) [in module %s]"), | |
5263 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
5264 | filename); |
5265 | } | |
5266 | ||
5267 | /* Read in a CU/TU header and perform some basic error checking. | |
5268 | The contents of the header are stored in HEADER. | |
5269 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 5270 | |
d521ce57 | 5271 | static const gdb_byte * |
9ff913ba DE |
5272 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
5273 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 5274 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 5275 | const gdb_byte *info_ptr, |
43988095 | 5276 | rcuh_kind section_kind) |
72bf9492 | 5277 | { |
d521ce57 | 5278 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 5279 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 5280 | |
9c541725 | 5281 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 5282 | |
43988095 | 5283 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 5284 | |
9c541725 | 5285 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 5286 | |
4bdcc0c1 | 5287 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
5288 | |
5289 | return info_ptr; | |
348e048f DE |
5290 | } |
5291 | ||
f4dc4d17 DE |
5292 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5293 | ||
5294 | static sect_offset | |
5295 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 5296 | sect_offset sect_off) |
f4dc4d17 | 5297 | { |
a32a8923 | 5298 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 5299 | const gdb_byte *info_ptr; |
ac298888 | 5300 | unsigned int initial_length_size, offset_size; |
43988095 | 5301 | uint16_t version; |
f4dc4d17 DE |
5302 | |
5303 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 5304 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5305 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5306 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5307 | info_ptr += initial_length_size; |
5308 | ||
5309 | version = read_2_bytes (abfd, info_ptr); | |
5310 | info_ptr += 2; | |
5311 | if (version >= 5) | |
5312 | { | |
5313 | /* Skip unit type and address size. */ | |
5314 | info_ptr += 2; | |
5315 | } | |
5316 | ||
9c541725 | 5317 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5318 | } |
5319 | ||
aaa75496 JB |
5320 | /* Allocate a new partial symtab for file named NAME and mark this new |
5321 | partial symtab as being an include of PST. */ | |
5322 | ||
5323 | static void | |
d521ce57 | 5324 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
5325 | struct objfile *objfile) |
5326 | { | |
5327 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
5328 | ||
fbd9ab74 JK |
5329 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5330 | { | |
5331 | /* It shares objfile->objfile_obstack. */ | |
5332 | subpst->dirname = pst->dirname; | |
5333 | } | |
5334 | ||
aaa75496 JB |
5335 | subpst->textlow = 0; |
5336 | subpst->texthigh = 0; | |
5337 | ||
8d749320 SM |
5338 | subpst->dependencies |
5339 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
5340 | subpst->dependencies[0] = pst; |
5341 | subpst->number_of_dependencies = 1; | |
5342 | ||
5343 | subpst->globals_offset = 0; | |
5344 | subpst->n_global_syms = 0; | |
5345 | subpst->statics_offset = 0; | |
5346 | subpst->n_static_syms = 0; | |
43f3e411 | 5347 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
5348 | subpst->read_symtab = pst->read_symtab; |
5349 | subpst->readin = 0; | |
5350 | ||
5351 | /* No private part is necessary for include psymtabs. This property | |
5352 | can be used to differentiate between such include psymtabs and | |
10b3939b | 5353 | the regular ones. */ |
58a9656e | 5354 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
5355 | } |
5356 | ||
5357 | /* Read the Line Number Program data and extract the list of files | |
5358 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5359 | partial symtab for each of these included files. */ |
aaa75496 JB |
5360 | |
5361 | static void | |
5362 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
5363 | struct die_info *die, |
5364 | struct partial_symtab *pst) | |
aaa75496 | 5365 | { |
fff8551c | 5366 | line_header_up lh; |
d85a05f0 | 5367 | struct attribute *attr; |
aaa75496 | 5368 | |
d85a05f0 DJ |
5369 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
5370 | if (attr) | |
9c541725 | 5371 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5372 | if (lh == NULL) |
5373 | return; /* No linetable, so no includes. */ | |
5374 | ||
c6da4cef | 5375 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 5376 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
5377 | } |
5378 | ||
348e048f | 5379 | static hashval_t |
52dc124a | 5380 | hash_signatured_type (const void *item) |
348e048f | 5381 | { |
9a3c8263 SM |
5382 | const struct signatured_type *sig_type |
5383 | = (const struct signatured_type *) item; | |
9a619af0 | 5384 | |
348e048f | 5385 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5386 | return sig_type->signature; |
348e048f DE |
5387 | } |
5388 | ||
5389 | static int | |
52dc124a | 5390 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5391 | { |
9a3c8263 SM |
5392 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5393 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5394 | |
348e048f DE |
5395 | return lhs->signature == rhs->signature; |
5396 | } | |
5397 | ||
1fd400ff TT |
5398 | /* Allocate a hash table for signatured types. */ |
5399 | ||
5400 | static htab_t | |
673bfd45 | 5401 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
5402 | { |
5403 | return htab_create_alloc_ex (41, | |
52dc124a DE |
5404 | hash_signatured_type, |
5405 | eq_signatured_type, | |
1fd400ff TT |
5406 | NULL, |
5407 | &objfile->objfile_obstack, | |
5408 | hashtab_obstack_allocate, | |
5409 | dummy_obstack_deallocate); | |
5410 | } | |
5411 | ||
d467dd73 | 5412 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
5413 | |
5414 | static int | |
d467dd73 | 5415 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 5416 | { |
9a3c8263 SM |
5417 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
5418 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 5419 | |
b4dd5633 | 5420 | **datap = sigt; |
1fd400ff TT |
5421 | ++*datap; |
5422 | ||
5423 | return 1; | |
5424 | } | |
5425 | ||
78d4d2c5 | 5426 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
5427 | and fill them into TYPES_HTAB. It will process only type units, |
5428 | therefore DW_UT_type. */ | |
c88ee1f0 | 5429 | |
78d4d2c5 JK |
5430 | static void |
5431 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
5432 | dwarf2_section_info *section, htab_t &types_htab, |
5433 | rcuh_kind section_kind) | |
348e048f | 5434 | { |
3019eac3 | 5435 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 5436 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
5437 | bfd *abfd; |
5438 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 5439 | |
4bdcc0c1 DE |
5440 | abbrev_section = (dwo_file != NULL |
5441 | ? &dwo_file->sections.abbrev | |
5442 | : &dwarf2_per_objfile->abbrev); | |
5443 | ||
b4f54984 | 5444 | if (dwarf_read_debug) |
43988095 JK |
5445 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
5446 | get_section_name (section), | |
a32a8923 | 5447 | get_section_file_name (abbrev_section)); |
09406207 | 5448 | |
78d4d2c5 JK |
5449 | dwarf2_read_section (objfile, section); |
5450 | info_ptr = section->buffer; | |
348e048f | 5451 | |
78d4d2c5 JK |
5452 | if (info_ptr == NULL) |
5453 | return; | |
348e048f | 5454 | |
78d4d2c5 JK |
5455 | /* We can't set abfd until now because the section may be empty or |
5456 | not present, in which case the bfd is unknown. */ | |
5457 | abfd = get_section_bfd_owner (section); | |
348e048f | 5458 | |
78d4d2c5 JK |
5459 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
5460 | because we don't need to read any dies: the signature is in the | |
5461 | header. */ | |
3019eac3 | 5462 | |
78d4d2c5 JK |
5463 | end_ptr = info_ptr + section->size; |
5464 | while (info_ptr < end_ptr) | |
5465 | { | |
78d4d2c5 JK |
5466 | struct signatured_type *sig_type; |
5467 | struct dwo_unit *dwo_tu; | |
5468 | void **slot; | |
5469 | const gdb_byte *ptr = info_ptr; | |
5470 | struct comp_unit_head header; | |
5471 | unsigned int length; | |
8b70b953 | 5472 | |
9c541725 | 5473 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 5474 | |
a49dd8dd JK |
5475 | /* Initialize it due to a false compiler warning. */ |
5476 | header.signature = -1; | |
9c541725 | 5477 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 5478 | |
78d4d2c5 JK |
5479 | /* We need to read the type's signature in order to build the hash |
5480 | table, but we don't need anything else just yet. */ | |
348e048f | 5481 | |
43988095 JK |
5482 | ptr = read_and_check_comp_unit_head (&header, section, |
5483 | abbrev_section, ptr, section_kind); | |
348e048f | 5484 | |
78d4d2c5 | 5485 | length = get_cu_length (&header); |
6caca83c | 5486 | |
78d4d2c5 JK |
5487 | /* Skip dummy type units. */ |
5488 | if (ptr >= info_ptr + length | |
43988095 JK |
5489 | || peek_abbrev_code (abfd, ptr) == 0 |
5490 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
5491 | { |
5492 | info_ptr += length; | |
5493 | continue; | |
5494 | } | |
dee91e82 | 5495 | |
78d4d2c5 JK |
5496 | if (types_htab == NULL) |
5497 | { | |
5498 | if (dwo_file) | |
5499 | types_htab = allocate_dwo_unit_table (objfile); | |
5500 | else | |
5501 | types_htab = allocate_signatured_type_table (objfile); | |
5502 | } | |
8b70b953 | 5503 | |
78d4d2c5 JK |
5504 | if (dwo_file) |
5505 | { | |
5506 | sig_type = NULL; | |
5507 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5508 | struct dwo_unit); | |
5509 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 5510 | dwo_tu->signature = header.signature; |
9c541725 | 5511 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 5512 | dwo_tu->section = section; |
9c541725 | 5513 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
5514 | dwo_tu->length = length; |
5515 | } | |
5516 | else | |
5517 | { | |
5518 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
5519 | The real type_offset is in the DWO file. */ | |
5520 | dwo_tu = NULL; | |
5521 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5522 | struct signatured_type); | |
43988095 | 5523 | sig_type->signature = header.signature; |
9c541725 | 5524 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
5525 | sig_type->per_cu.objfile = objfile; |
5526 | sig_type->per_cu.is_debug_types = 1; | |
5527 | sig_type->per_cu.section = section; | |
9c541725 | 5528 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
5529 | sig_type->per_cu.length = length; |
5530 | } | |
5531 | ||
5532 | slot = htab_find_slot (types_htab, | |
5533 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
5534 | INSERT); | |
5535 | gdb_assert (slot != NULL); | |
5536 | if (*slot != NULL) | |
5537 | { | |
9c541725 | 5538 | sect_offset dup_sect_off; |
0349ea22 | 5539 | |
3019eac3 DE |
5540 | if (dwo_file) |
5541 | { | |
78d4d2c5 JK |
5542 | const struct dwo_unit *dup_tu |
5543 | = (const struct dwo_unit *) *slot; | |
5544 | ||
9c541725 | 5545 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
5546 | } |
5547 | else | |
5548 | { | |
78d4d2c5 JK |
5549 | const struct signatured_type *dup_tu |
5550 | = (const struct signatured_type *) *slot; | |
5551 | ||
9c541725 | 5552 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 5553 | } |
8b70b953 | 5554 | |
78d4d2c5 JK |
5555 | complaint (&symfile_complaints, |
5556 | _("debug type entry at offset 0x%x is duplicate to" | |
5557 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 5558 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 5559 | hex_string (header.signature)); |
78d4d2c5 JK |
5560 | } |
5561 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 5562 | |
78d4d2c5 JK |
5563 | if (dwarf_read_debug > 1) |
5564 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 5565 | to_underlying (sect_off), |
43988095 | 5566 | hex_string (header.signature)); |
3019eac3 | 5567 | |
78d4d2c5 JK |
5568 | info_ptr += length; |
5569 | } | |
5570 | } | |
3019eac3 | 5571 | |
78d4d2c5 JK |
5572 | /* Create the hash table of all entries in the .debug_types |
5573 | (or .debug_types.dwo) section(s). | |
5574 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
5575 | otherwise it is NULL. | |
b3c8eb43 | 5576 | |
78d4d2c5 | 5577 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 5578 | |
78d4d2c5 | 5579 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 5580 | |
78d4d2c5 JK |
5581 | static void |
5582 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
5583 | VEC (dwarf2_section_info_def) *types, | |
5584 | htab_t &types_htab) | |
5585 | { | |
5586 | int ix; | |
5587 | struct dwarf2_section_info *section; | |
5588 | ||
5589 | if (VEC_empty (dwarf2_section_info_def, types)) | |
5590 | return; | |
348e048f | 5591 | |
78d4d2c5 JK |
5592 | for (ix = 0; |
5593 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5594 | ++ix) | |
43988095 JK |
5595 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5596 | rcuh_kind::TYPE); | |
3019eac3 DE |
5597 | } |
5598 | ||
5599 | /* Create the hash table of all entries in the .debug_types section, | |
5600 | and initialize all_type_units. | |
5601 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5602 | otherwise non-zero. */ | |
5603 | ||
5604 | static int | |
5605 | create_all_type_units (struct objfile *objfile) | |
5606 | { | |
78d4d2c5 | 5607 | htab_t types_htab = NULL; |
b4dd5633 | 5608 | struct signatured_type **iter; |
3019eac3 | 5609 | |
43988095 JK |
5610 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5611 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5612 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5613 | if (types_htab == NULL) |
5614 | { | |
5615 | dwarf2_per_objfile->signatured_types = NULL; | |
5616 | return 0; | |
5617 | } | |
5618 | ||
348e048f DE |
5619 | dwarf2_per_objfile->signatured_types = types_htab; |
5620 | ||
6aa5f3a6 DE |
5621 | dwarf2_per_objfile->n_type_units |
5622 | = dwarf2_per_objfile->n_allocated_type_units | |
5623 | = htab_elements (types_htab); | |
8d749320 SM |
5624 | dwarf2_per_objfile->all_type_units = |
5625 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5626 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5627 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5628 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5629 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5630 | |
348e048f DE |
5631 | return 1; |
5632 | } | |
5633 | ||
6aa5f3a6 DE |
5634 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5635 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5636 | Otherwise we find one. */ | |
5637 | ||
5638 | static struct signatured_type * | |
5639 | add_type_unit (ULONGEST sig, void **slot) | |
5640 | { | |
5641 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5642 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5643 | struct signatured_type *sig_type; | |
5644 | ||
5645 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5646 | ++n_type_units; | |
5647 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5648 | { | |
5649 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5650 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5651 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5652 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5653 | = XRESIZEVEC (struct signatured_type *, |
5654 | dwarf2_per_objfile->all_type_units, | |
5655 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5656 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5657 | } | |
5658 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5659 | ||
5660 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5661 | struct signatured_type); | |
5662 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5663 | sig_type->signature = sig; | |
5664 | sig_type->per_cu.is_debug_types = 1; | |
5665 | if (dwarf2_per_objfile->using_index) | |
5666 | { | |
5667 | sig_type->per_cu.v.quick = | |
5668 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5669 | struct dwarf2_per_cu_quick_data); | |
5670 | } | |
5671 | ||
5672 | if (slot == NULL) | |
5673 | { | |
5674 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5675 | sig_type, INSERT); | |
5676 | } | |
5677 | gdb_assert (*slot == NULL); | |
5678 | *slot = sig_type; | |
5679 | /* The rest of sig_type must be filled in by the caller. */ | |
5680 | return sig_type; | |
5681 | } | |
5682 | ||
a2ce51a0 DE |
5683 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5684 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5685 | ||
5686 | static void | |
5687 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5688 | struct signatured_type *sig_entry, | |
5689 | struct dwo_unit *dwo_entry) | |
5690 | { | |
7ee85ab1 | 5691 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5692 | gdb_assert (! sig_entry->per_cu.queued); |
5693 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5694 | if (dwarf2_per_objfile->using_index) |
5695 | { | |
5696 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5697 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5698 | } |
5699 | else | |
5700 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5701 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5702 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5703 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5704 | gdb_assert (sig_entry->dwo_unit == NULL); |
5705 | ||
5706 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5707 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5708 | sig_entry->per_cu.length = dwo_entry->length; |
5709 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5710 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5711 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5712 | sig_entry->dwo_unit = dwo_entry; | |
5713 | } | |
5714 | ||
5715 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5716 | If we haven't read the TU yet, create the signatured_type data structure |
5717 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5718 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5719 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5720 | containing that CU. Otherwise we could end up reading several other DWO | |
5721 | files (due to comdat folding) to process the transitive closure of all the | |
5722 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5723 | type signature that it needs. | |
a2ce51a0 DE |
5724 | We only do this for .gdb_index because in the psymtab case we already have |
5725 | to read all the DWOs to build the type unit groups. */ | |
5726 | ||
5727 | static struct signatured_type * | |
5728 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5729 | { | |
5730 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5731 | struct dwo_file *dwo_file; | |
5732 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5733 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5734 | void **slot; |
a2ce51a0 DE |
5735 | |
5736 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5737 | ||
6aa5f3a6 DE |
5738 | /* If TU skeletons have been removed then we may not have read in any |
5739 | TUs yet. */ | |
5740 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5741 | { | |
5742 | dwarf2_per_objfile->signatured_types | |
5743 | = allocate_signatured_type_table (objfile); | |
5744 | } | |
a2ce51a0 DE |
5745 | |
5746 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5747 | Use the global signatured_types array to do our own comdat-folding |
5748 | of types. If this is the first time we're reading this TU, and | |
5749 | the TU has an entry in .gdb_index, replace the recorded data from | |
5750 | .gdb_index with this TU. */ | |
a2ce51a0 | 5751 | |
a2ce51a0 | 5752 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
5753 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
5754 | &find_sig_entry, INSERT); | |
9a3c8263 | 5755 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5756 | |
5757 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5758 | read. Don't reassign the global entry to point to this DWO if that's |
5759 | the case. Also note that if the TU is already being read, it may not | |
5760 | have come from a DWO, the program may be a mix of Fission-compiled | |
5761 | code and non-Fission-compiled code. */ | |
5762 | ||
5763 | /* Have we already tried to read this TU? | |
5764 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5765 | needn't exist in the global table yet). */ | |
5766 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
5767 | return sig_entry; |
5768 | ||
6aa5f3a6 DE |
5769 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
5770 | dwo_unit of the TU itself. */ | |
5771 | dwo_file = cu->dwo_unit->dwo_file; | |
5772 | ||
a2ce51a0 DE |
5773 | /* Ok, this is the first time we're reading this TU. */ |
5774 | if (dwo_file->tus == NULL) | |
5775 | return NULL; | |
5776 | find_dwo_entry.signature = sig; | |
9a3c8263 | 5777 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
5778 | if (dwo_entry == NULL) |
5779 | return NULL; | |
5780 | ||
6aa5f3a6 DE |
5781 | /* If the global table doesn't have an entry for this TU, add one. */ |
5782 | if (sig_entry == NULL) | |
5783 | sig_entry = add_type_unit (sig, slot); | |
5784 | ||
a2ce51a0 | 5785 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 5786 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
5787 | return sig_entry; |
5788 | } | |
5789 | ||
a2ce51a0 DE |
5790 | /* Subroutine of lookup_signatured_type. |
5791 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
5792 | then try the DWP file. If the TU stub (skeleton) has been removed then |
5793 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
5794 | |
5795 | static struct signatured_type * | |
5796 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5797 | { | |
5798 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5799 | struct dwp_file *dwp_file = get_dwp_file (); | |
5800 | struct dwo_unit *dwo_entry; | |
5801 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5802 | void **slot; |
a2ce51a0 DE |
5803 | |
5804 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5805 | gdb_assert (dwp_file != NULL); | |
5806 | ||
6aa5f3a6 DE |
5807 | /* If TU skeletons have been removed then we may not have read in any |
5808 | TUs yet. */ | |
5809 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 5810 | { |
6aa5f3a6 DE |
5811 | dwarf2_per_objfile->signatured_types |
5812 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
5813 | } |
5814 | ||
6aa5f3a6 DE |
5815 | find_sig_entry.signature = sig; |
5816 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5817 | &find_sig_entry, INSERT); | |
9a3c8263 | 5818 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
5819 | |
5820 | /* Have we already tried to read this TU? | |
5821 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5822 | needn't exist in the global table yet). */ | |
5823 | if (sig_entry != NULL) | |
5824 | return sig_entry; | |
5825 | ||
a2ce51a0 DE |
5826 | if (dwp_file->tus == NULL) |
5827 | return NULL; | |
57d63ce2 DE |
5828 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
5829 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
5830 | if (dwo_entry == NULL) |
5831 | return NULL; | |
5832 | ||
6aa5f3a6 | 5833 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
5834 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
5835 | ||
a2ce51a0 DE |
5836 | return sig_entry; |
5837 | } | |
5838 | ||
380bca97 | 5839 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5840 | Returns NULL if signature SIG is not present in the table. |
5841 | It is up to the caller to complain about this. */ | |
348e048f DE |
5842 | |
5843 | static struct signatured_type * | |
a2ce51a0 | 5844 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5845 | { |
a2ce51a0 DE |
5846 | if (cu->dwo_unit |
5847 | && dwarf2_per_objfile->using_index) | |
5848 | { | |
5849 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5850 | These cases require special processing. */ | |
5851 | if (get_dwp_file () == NULL) | |
5852 | return lookup_dwo_signatured_type (cu, sig); | |
5853 | else | |
5854 | return lookup_dwp_signatured_type (cu, sig); | |
5855 | } | |
5856 | else | |
5857 | { | |
5858 | struct signatured_type find_entry, *entry; | |
348e048f | 5859 | |
a2ce51a0 DE |
5860 | if (dwarf2_per_objfile->signatured_types == NULL) |
5861 | return NULL; | |
5862 | find_entry.signature = sig; | |
9a3c8263 SM |
5863 | entry = ((struct signatured_type *) |
5864 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5865 | return entry; |
5866 | } | |
348e048f | 5867 | } |
42e7ad6c DE |
5868 | \f |
5869 | /* Low level DIE reading support. */ | |
348e048f | 5870 | |
d85a05f0 DJ |
5871 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5872 | ||
5873 | static void | |
5874 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5875 | struct dwarf2_cu *cu, |
3019eac3 DE |
5876 | struct dwarf2_section_info *section, |
5877 | struct dwo_file *dwo_file) | |
d85a05f0 | 5878 | { |
fceca515 | 5879 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5880 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5881 | reader->cu = cu; |
3019eac3 | 5882 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5883 | reader->die_section = section; |
5884 | reader->buffer = section->buffer; | |
f664829e | 5885 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5886 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5887 | } |
5888 | ||
b0c7bfa9 DE |
5889 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5890 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5891 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5892 | already. | |
5893 | ||
5894 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5895 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5896 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5897 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5898 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5899 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5900 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5901 | are filled in with the info of the DIE from the DWO file. | |
5902 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5903 | provided an abbrev table to use. | |
5904 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5905 | ||
5906 | static int | |
5907 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5908 | struct dwo_unit *dwo_unit, | |
5909 | int abbrev_table_provided, | |
5910 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5911 | const char *stub_comp_dir, |
b0c7bfa9 | 5912 | struct die_reader_specs *result_reader, |
d521ce57 | 5913 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5914 | struct die_info **result_comp_unit_die, |
5915 | int *result_has_children) | |
5916 | { | |
5917 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5918 | struct dwarf2_cu *cu = this_cu->cu; | |
5919 | struct dwarf2_section_info *section; | |
5920 | bfd *abfd; | |
d521ce57 | 5921 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5922 | ULONGEST signature; /* Or dwo_id. */ |
5923 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5924 | int i,num_extra_attrs; | |
5925 | struct dwarf2_section_info *dwo_abbrev_section; | |
5926 | struct attribute *attr; | |
5927 | struct die_info *comp_unit_die; | |
5928 | ||
b0aeadb3 DE |
5929 | /* At most one of these may be provided. */ |
5930 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5931 | |
b0c7bfa9 DE |
5932 | /* These attributes aren't processed until later: |
5933 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5934 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5935 | referenced later. However, these attributes are found in the stub | |
5936 | which we won't have later. In order to not impose this complication | |
5937 | on the rest of the code, we read them here and copy them to the | |
5938 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5939 | |
5940 | stmt_list = NULL; | |
5941 | low_pc = NULL; | |
5942 | high_pc = NULL; | |
5943 | ranges = NULL; | |
5944 | comp_dir = NULL; | |
5945 | ||
5946 | if (stub_comp_unit_die != NULL) | |
5947 | { | |
5948 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5949 | DWO file. */ | |
5950 | if (! this_cu->is_debug_types) | |
5951 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5952 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5953 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5954 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5955 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5956 | ||
5957 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5958 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5959 | cu->addr_base = 0; | |
5960 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5961 | if (attr) | |
5962 | cu->addr_base = DW_UNSND (attr); | |
5963 | ||
5964 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5965 | We need the value before we can process DW_AT_ranges. */ | |
5966 | cu->ranges_base = 0; | |
5967 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5968 | if (attr) | |
5969 | cu->ranges_base = DW_UNSND (attr); | |
5970 | } | |
a2ce51a0 DE |
5971 | else if (stub_comp_dir != NULL) |
5972 | { | |
5973 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5974 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5975 | comp_dir->name = DW_AT_comp_dir; |
5976 | comp_dir->form = DW_FORM_string; | |
5977 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5978 | DW_STRING (comp_dir) = stub_comp_dir; | |
5979 | } | |
b0c7bfa9 DE |
5980 | |
5981 | /* Set up for reading the DWO CU/TU. */ | |
5982 | cu->dwo_unit = dwo_unit; | |
5983 | section = dwo_unit->section; | |
5984 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5985 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
5986 | begin_info_ptr = info_ptr = (section->buffer |
5987 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
5988 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
5989 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5990 | ||
5991 | if (this_cu->is_debug_types) | |
5992 | { | |
b0c7bfa9 DE |
5993 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
5994 | ||
43988095 | 5995 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 5996 | dwo_abbrev_section, |
43988095 | 5997 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 5998 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 5999 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6000 | { |
6001 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
6002 | " TU at offset 0x%x [in module %s]"), | |
6003 | hex_string (sig_type->signature), | |
43988095 | 6004 | hex_string (cu->header.signature), |
9c541725 | 6005 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
6006 | bfd_get_filename (abfd)); |
6007 | } | |
9c541725 | 6008 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6009 | /* For DWOs coming from DWP files, we don't know the CU length |
6010 | nor the type's offset in the TU until now. */ | |
6011 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 6012 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6013 | |
6014 | /* Establish the type offset that can be used to lookup the type. | |
6015 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6016 | sig_type->type_offset_in_section |
6017 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6018 | } |
6019 | else | |
6020 | { | |
6021 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
6022 | dwo_abbrev_section, | |
43988095 | 6023 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6024 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6025 | /* For DWOs coming from DWP files, we don't know the CU length |
6026 | until now. */ | |
6027 | dwo_unit->length = get_cu_length (&cu->header); | |
6028 | } | |
6029 | ||
02142a6c DE |
6030 | /* Replace the CU's original abbrev table with the DWO's. |
6031 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
6032 | if (abbrev_table_provided) |
6033 | { | |
6034 | /* Don't free the provided abbrev table, the caller of | |
6035 | init_cutu_and_read_dies owns it. */ | |
6036 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6037 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
6038 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6039 | } | |
6040 | else | |
6041 | { | |
6042 | dwarf2_free_abbrev_table (cu); | |
6043 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6044 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
6045 | } |
6046 | ||
6047 | /* Read in the die, but leave space to copy over the attributes | |
6048 | from the stub. This has the benefit of simplifying the rest of | |
6049 | the code - all the work to maintain the illusion of a single | |
6050 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6051 | num_extra_attrs = ((stmt_list != NULL) | |
6052 | + (low_pc != NULL) | |
6053 | + (high_pc != NULL) | |
6054 | + (ranges != NULL) | |
6055 | + (comp_dir != NULL)); | |
6056 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
6057 | result_has_children, num_extra_attrs); | |
6058 | ||
6059 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6060 | comp_unit_die = *result_comp_unit_die; | |
6061 | i = comp_unit_die->num_attrs; | |
6062 | if (stmt_list != NULL) | |
6063 | comp_unit_die->attrs[i++] = *stmt_list; | |
6064 | if (low_pc != NULL) | |
6065 | comp_unit_die->attrs[i++] = *low_pc; | |
6066 | if (high_pc != NULL) | |
6067 | comp_unit_die->attrs[i++] = *high_pc; | |
6068 | if (ranges != NULL) | |
6069 | comp_unit_die->attrs[i++] = *ranges; | |
6070 | if (comp_dir != NULL) | |
6071 | comp_unit_die->attrs[i++] = *comp_dir; | |
6072 | comp_unit_die->num_attrs += num_extra_attrs; | |
6073 | ||
b4f54984 | 6074 | if (dwarf_die_debug) |
bf6af496 DE |
6075 | { |
6076 | fprintf_unfiltered (gdb_stdlog, | |
6077 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 6078 | get_section_name (section), |
bf6af496 DE |
6079 | (unsigned) (begin_info_ptr - section->buffer), |
6080 | bfd_get_filename (abfd)); | |
b4f54984 | 6081 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6082 | } |
6083 | ||
a2ce51a0 DE |
6084 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
6085 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
6086 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
6087 | to get it via circuitous means. Blech. */ | |
6088 | if (comp_dir != NULL) | |
6089 | result_reader->comp_dir = DW_STRING (comp_dir); | |
6090 | ||
b0c7bfa9 DE |
6091 | /* Skip dummy compilation units. */ |
6092 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6093 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6094 | return 0; | |
6095 | ||
6096 | *result_info_ptr = info_ptr; | |
6097 | return 1; | |
6098 | } | |
6099 | ||
6100 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
6101 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 6102 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6103 | |
6104 | static struct dwo_unit * | |
6105 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
6106 | struct die_info *comp_unit_die) | |
6107 | { | |
6108 | struct dwarf2_cu *cu = this_cu->cu; | |
6109 | struct attribute *attr; | |
6110 | ULONGEST signature; | |
6111 | struct dwo_unit *dwo_unit; | |
6112 | const char *comp_dir, *dwo_name; | |
6113 | ||
a2ce51a0 DE |
6114 | gdb_assert (cu != NULL); |
6115 | ||
b0c7bfa9 | 6116 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
6117 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6118 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
6119 | |
6120 | if (this_cu->is_debug_types) | |
6121 | { | |
6122 | struct signatured_type *sig_type; | |
6123 | ||
6124 | /* Since this_cu is the first member of struct signatured_type, | |
6125 | we can go from a pointer to one to a pointer to the other. */ | |
6126 | sig_type = (struct signatured_type *) this_cu; | |
6127 | signature = sig_type->signature; | |
6128 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
6129 | } | |
6130 | else | |
6131 | { | |
6132 | struct attribute *attr; | |
6133 | ||
6134 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6135 | if (! attr) | |
6136 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
6137 | " [in module %s]"), | |
4262abfb | 6138 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
6139 | signature = DW_UNSND (attr); |
6140 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
6141 | signature); | |
6142 | } | |
6143 | ||
b0c7bfa9 DE |
6144 | return dwo_unit; |
6145 | } | |
6146 | ||
a2ce51a0 | 6147 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
6148 | See it for a description of the parameters. |
6149 | Read a TU directly from a DWO file, bypassing the stub. | |
6150 | ||
6151 | Note: This function could be a little bit simpler if we shared cleanups | |
6152 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
6153 | to do, so we keep this function self-contained. Or we could move this | |
6154 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
6155 | |
6156 | static void | |
6aa5f3a6 DE |
6157 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
6158 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
6159 | die_reader_func_ftype *die_reader_func, |
6160 | void *data) | |
6161 | { | |
6162 | struct dwarf2_cu *cu; | |
6163 | struct signatured_type *sig_type; | |
6aa5f3a6 | 6164 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
6165 | struct die_reader_specs reader; |
6166 | const gdb_byte *info_ptr; | |
6167 | struct die_info *comp_unit_die; | |
6168 | int has_children; | |
6169 | ||
6170 | /* Verify we can do the following downcast, and that we have the | |
6171 | data we need. */ | |
6172 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6173 | sig_type = (struct signatured_type *) this_cu; | |
6174 | gdb_assert (sig_type->dwo_unit != NULL); | |
6175 | ||
6176 | cleanups = make_cleanup (null_cleanup, NULL); | |
6177 | ||
6aa5f3a6 DE |
6178 | if (use_existing_cu && this_cu->cu != NULL) |
6179 | { | |
6180 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6181 | cu = this_cu->cu; | |
6182 | /* There's no need to do the rereading_dwo_cu handling that | |
6183 | init_cutu_and_read_dies does since we don't read the stub. */ | |
6184 | } | |
6185 | else | |
6186 | { | |
6187 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6188 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6189 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
6190 | init_one_comp_unit (cu, this_cu); |
6191 | /* If an error occurs while loading, release our storage. */ | |
6192 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
6193 | } | |
6194 | ||
6195 | /* A future optimization, if needed, would be to use an existing | |
6196 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6197 | could share abbrev tables. */ | |
a2ce51a0 DE |
6198 | |
6199 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
6200 | 0 /* abbrev_table_provided */, | |
6201 | NULL /* stub_comp_unit_die */, | |
6202 | sig_type->dwo_unit->dwo_file->comp_dir, | |
6203 | &reader, &info_ptr, | |
6204 | &comp_unit_die, &has_children) == 0) | |
6205 | { | |
6206 | /* Dummy die. */ | |
6207 | do_cleanups (cleanups); | |
6208 | return; | |
6209 | } | |
6210 | ||
6211 | /* All the "real" work is done here. */ | |
6212 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6213 | ||
6aa5f3a6 | 6214 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
6215 | but the alternative is making the latter more complex. |
6216 | This function is only for the special case of using DWO files directly: | |
6217 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 6218 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 6219 | { |
6aa5f3a6 DE |
6220 | if (keep) |
6221 | { | |
6222 | /* We've successfully allocated this compilation unit. Let our | |
6223 | caller clean it up when finished with it. */ | |
6224 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6225 | |
6aa5f3a6 DE |
6226 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6227 | So we have to manually free the abbrev table. */ | |
6228 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 6229 | |
6aa5f3a6 DE |
6230 | /* Link this CU into read_in_chain. */ |
6231 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6232 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6233 | } | |
6234 | else | |
6235 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6236 | } |
a2ce51a0 DE |
6237 | |
6238 | do_cleanups (cleanups); | |
6239 | } | |
6240 | ||
fd820528 | 6241 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6242 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6243 | |
f4dc4d17 DE |
6244 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6245 | Otherwise the table specified in the comp unit header is read in and used. | |
6246 | This is an optimization for when we already have the abbrev table. | |
6247 | ||
dee91e82 DE |
6248 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6249 | Otherwise, a new CU is allocated with xmalloc. | |
6250 | ||
6251 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
6252 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
6253 | ||
6254 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 6255 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 6256 | |
70221824 | 6257 | static void |
fd820528 | 6258 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 6259 | struct abbrev_table *abbrev_table, |
fd820528 DE |
6260 | int use_existing_cu, int keep, |
6261 | die_reader_func_ftype *die_reader_func, | |
6262 | void *data) | |
c906108c | 6263 | { |
dee91e82 | 6264 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6265 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6266 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 6267 | struct dwarf2_cu *cu; |
d521ce57 | 6268 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 6269 | struct die_reader_specs reader; |
d85a05f0 | 6270 | struct die_info *comp_unit_die; |
dee91e82 | 6271 | int has_children; |
d85a05f0 | 6272 | struct attribute *attr; |
365156ad | 6273 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 6274 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6275 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6276 | /* Non-zero if CU currently points to a DWO file and we need to |
6277 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6278 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6279 | int rereading_dwo_cu = 0; |
c906108c | 6280 | |
b4f54984 | 6281 | if (dwarf_die_debug) |
09406207 DE |
6282 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6283 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6284 | to_underlying (this_cu->sect_off)); |
09406207 | 6285 | |
dee91e82 DE |
6286 | if (use_existing_cu) |
6287 | gdb_assert (keep); | |
23745b47 | 6288 | |
a2ce51a0 DE |
6289 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6290 | file (instead of going through the stub), short-circuit all of this. */ | |
6291 | if (this_cu->reading_dwo_directly) | |
6292 | { | |
6293 | /* Narrow down the scope of possibilities to have to understand. */ | |
6294 | gdb_assert (this_cu->is_debug_types); | |
6295 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
6296 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
6297 | die_reader_func, data); | |
a2ce51a0 DE |
6298 | return; |
6299 | } | |
6300 | ||
dee91e82 DE |
6301 | cleanups = make_cleanup (null_cleanup, NULL); |
6302 | ||
6303 | /* This is cheap if the section is already read in. */ | |
6304 | dwarf2_read_section (objfile, section); | |
6305 | ||
9c541725 | 6306 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6307 | |
6308 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6309 | |
6310 | if (use_existing_cu && this_cu->cu != NULL) | |
6311 | { | |
6312 | cu = this_cu->cu; | |
42e7ad6c DE |
6313 | /* If this CU is from a DWO file we need to start over, we need to |
6314 | refetch the attributes from the skeleton CU. | |
6315 | This could be optimized by retrieving those attributes from when we | |
6316 | were here the first time: the previous comp_unit_die was stored in | |
6317 | comp_unit_obstack. But there's no data yet that we need this | |
6318 | optimization. */ | |
6319 | if (cu->dwo_unit != NULL) | |
6320 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6321 | } |
6322 | else | |
6323 | { | |
6324 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6325 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6326 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 6327 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 6328 | /* If an error occurs while loading, release our storage. */ |
365156ad | 6329 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 6330 | } |
dee91e82 | 6331 | |
b0c7bfa9 | 6332 | /* Get the header. */ |
9c541725 | 6333 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6334 | { |
6335 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6336 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6337 | } |
6338 | else | |
6339 | { | |
3019eac3 | 6340 | if (this_cu->is_debug_types) |
dee91e82 | 6341 | { |
43988095 | 6342 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 6343 | abbrev_section, info_ptr, |
43988095 | 6344 | rcuh_kind::TYPE); |
dee91e82 | 6345 | |
42e7ad6c DE |
6346 | /* Since per_cu is the first member of struct signatured_type, |
6347 | we can go from a pointer to one to a pointer to the other. */ | |
6348 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6349 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6350 | gdb_assert (sig_type->type_offset_in_tu |
6351 | == cu->header.type_cu_offset_in_tu); | |
6352 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6353 | |
42e7ad6c DE |
6354 | /* LENGTH has not been set yet for type units if we're |
6355 | using .gdb_index. */ | |
1ce1cefd | 6356 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
6357 | |
6358 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6359 | sig_type->type_offset_in_section = |
6360 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6361 | |
6362 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6363 | } |
6364 | else | |
6365 | { | |
4bdcc0c1 DE |
6366 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
6367 | abbrev_section, | |
43988095 JK |
6368 | info_ptr, |
6369 | rcuh_kind::COMPILE); | |
dee91e82 | 6370 | |
9c541725 | 6371 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 6372 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 6373 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6374 | } |
6375 | } | |
10b3939b | 6376 | |
6caca83c | 6377 | /* Skip dummy compilation units. */ |
dee91e82 | 6378 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
6379 | || peek_abbrev_code (abfd, info_ptr) == 0) |
6380 | { | |
dee91e82 | 6381 | do_cleanups (cleanups); |
21b2bd31 | 6382 | return; |
6caca83c CC |
6383 | } |
6384 | ||
433df2d4 DE |
6385 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6386 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
6387 | done. Note that it's important that if the CU had an abbrev table |
6388 | on entry we don't free it when we're done: Somewhere up the call stack | |
6389 | it may be in use. */ | |
f4dc4d17 DE |
6390 | if (abbrev_table != NULL) |
6391 | { | |
6392 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 6393 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
6394 | cu->abbrev_table = abbrev_table; |
6395 | } | |
6396 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 6397 | { |
4bdcc0c1 | 6398 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
6399 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6400 | } | |
42e7ad6c DE |
6401 | else if (rereading_dwo_cu) |
6402 | { | |
6403 | dwarf2_free_abbrev_table (cu); | |
6404 | dwarf2_read_abbrevs (cu, abbrev_section); | |
6405 | } | |
af703f96 | 6406 | |
dee91e82 | 6407 | /* Read the top level CU/TU die. */ |
3019eac3 | 6408 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 6409 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 6410 | |
b0c7bfa9 DE |
6411 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
6412 | from the DWO file. | |
6413 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
6414 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
6415 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6416 | if (attr) | |
6417 | { | |
3019eac3 | 6418 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6419 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
6420 | |
6421 | if (has_children) | |
6a506a2d DE |
6422 | { |
6423 | complaint (&symfile_complaints, | |
6424 | _("compilation unit with DW_AT_GNU_dwo_name" | |
6425 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 6426 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 6427 | } |
b0c7bfa9 | 6428 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 6429 | if (dwo_unit != NULL) |
3019eac3 | 6430 | { |
6a506a2d DE |
6431 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
6432 | abbrev_table != NULL, | |
a2ce51a0 | 6433 | comp_unit_die, NULL, |
6a506a2d DE |
6434 | &reader, &info_ptr, |
6435 | &dwo_comp_unit_die, &has_children) == 0) | |
6436 | { | |
6437 | /* Dummy die. */ | |
6438 | do_cleanups (cleanups); | |
6439 | return; | |
6440 | } | |
6441 | comp_unit_die = dwo_comp_unit_die; | |
6442 | } | |
6443 | else | |
6444 | { | |
6445 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6446 | the stub. A complaint has already been logged. There's | |
6447 | not much more we can do except pass on the stub DIE to | |
6448 | die_reader_func. We don't want to throw an error on bad | |
6449 | debug info. */ | |
3019eac3 DE |
6450 | } |
6451 | } | |
6452 | ||
b0c7bfa9 | 6453 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
6454 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
6455 | ||
b0c7bfa9 | 6456 | /* Done, clean up. */ |
365156ad | 6457 | if (free_cu_cleanup != NULL) |
348e048f | 6458 | { |
365156ad TT |
6459 | if (keep) |
6460 | { | |
6461 | /* We've successfully allocated this compilation unit. Let our | |
6462 | caller clean it up when finished with it. */ | |
6463 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 6464 | |
365156ad TT |
6465 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6466 | So we have to manually free the abbrev table. */ | |
6467 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 6468 | |
365156ad TT |
6469 | /* Link this CU into read_in_chain. */ |
6470 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6471 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6472 | } | |
6473 | else | |
6474 | do_cleanups (free_cu_cleanup); | |
348e048f | 6475 | } |
365156ad TT |
6476 | |
6477 | do_cleanups (cleanups); | |
dee91e82 DE |
6478 | } |
6479 | ||
33e80786 DE |
6480 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
6481 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
6482 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6483 | |
6484 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6485 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6486 | |
6487 | We fill in THIS_CU->length. | |
6488 | ||
6489 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
6490 | linker) then DIE_READER_FUNC will not get called. | |
6491 | ||
6492 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6493 | This is done in order to not leave THIS_CU->cu in a state where we have |
6494 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
6495 | |
6496 | static void | |
6497 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 6498 | struct dwo_file *dwo_file, |
dee91e82 DE |
6499 | die_reader_func_ftype *die_reader_func, |
6500 | void *data) | |
6501 | { | |
6502 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 6503 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6504 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 6505 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 6506 | struct dwarf2_cu cu; |
d521ce57 | 6507 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
6508 | struct die_reader_specs reader; |
6509 | struct cleanup *cleanups; | |
6510 | struct die_info *comp_unit_die; | |
6511 | int has_children; | |
6512 | ||
b4f54984 | 6513 | if (dwarf_die_debug) |
09406207 DE |
6514 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6515 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6516 | to_underlying (this_cu->sect_off)); |
09406207 | 6517 | |
dee91e82 DE |
6518 | gdb_assert (this_cu->cu == NULL); |
6519 | ||
33e80786 DE |
6520 | abbrev_section = (dwo_file != NULL |
6521 | ? &dwo_file->sections.abbrev | |
6522 | : get_abbrev_section_for_cu (this_cu)); | |
6523 | ||
dee91e82 DE |
6524 | /* This is cheap if the section is already read in. */ |
6525 | dwarf2_read_section (objfile, section); | |
6526 | ||
6527 | init_one_comp_unit (&cu, this_cu); | |
6528 | ||
6529 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
6530 | ||
9c541725 | 6531 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
6532 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
6533 | abbrev_section, info_ptr, | |
43988095 JK |
6534 | (this_cu->is_debug_types |
6535 | ? rcuh_kind::TYPE | |
6536 | : rcuh_kind::COMPILE)); | |
dee91e82 | 6537 | |
1ce1cefd | 6538 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
6539 | |
6540 | /* Skip dummy compilation units. */ | |
6541 | if (info_ptr >= begin_info_ptr + this_cu->length | |
6542 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 6543 | { |
dee91e82 | 6544 | do_cleanups (cleanups); |
21b2bd31 | 6545 | return; |
93311388 | 6546 | } |
72bf9492 | 6547 | |
dee91e82 DE |
6548 | dwarf2_read_abbrevs (&cu, abbrev_section); |
6549 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
6550 | ||
3019eac3 | 6551 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
6552 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
6553 | ||
6554 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6555 | ||
6556 | do_cleanups (cleanups); | |
6557 | } | |
6558 | ||
3019eac3 DE |
6559 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
6560 | does not lookup the specified DWO file. | |
6561 | This cannot be used to read DWO files. | |
dee91e82 DE |
6562 | |
6563 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6564 | This is done in order to not leave THIS_CU->cu in a state where we have |
6565 | to care whether it refers to the "main" CU or the DWO CU. | |
6566 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
6567 | |
6568 | static void | |
6569 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
6570 | die_reader_func_ftype *die_reader_func, | |
6571 | void *data) | |
6572 | { | |
33e80786 | 6573 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 6574 | } |
0018ea6f DE |
6575 | \f |
6576 | /* Type Unit Groups. | |
dee91e82 | 6577 | |
0018ea6f DE |
6578 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
6579 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
6580 | so that all types coming from the same compilation (.o file) are grouped | |
6581 | together. A future step could be to put the types in the same symtab as | |
6582 | the CU the types ultimately came from. */ | |
ff013f42 | 6583 | |
f4dc4d17 DE |
6584 | static hashval_t |
6585 | hash_type_unit_group (const void *item) | |
6586 | { | |
9a3c8263 SM |
6587 | const struct type_unit_group *tu_group |
6588 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6589 | |
094b34ac | 6590 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6591 | } |
348e048f DE |
6592 | |
6593 | static int | |
f4dc4d17 | 6594 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6595 | { |
9a3c8263 SM |
6596 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6597 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6598 | |
094b34ac | 6599 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6600 | } |
348e048f | 6601 | |
f4dc4d17 DE |
6602 | /* Allocate a hash table for type unit groups. */ |
6603 | ||
6604 | static htab_t | |
6605 | allocate_type_unit_groups_table (void) | |
6606 | { | |
6607 | return htab_create_alloc_ex (3, | |
6608 | hash_type_unit_group, | |
6609 | eq_type_unit_group, | |
6610 | NULL, | |
6611 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6612 | hashtab_obstack_allocate, | |
6613 | dummy_obstack_deallocate); | |
6614 | } | |
dee91e82 | 6615 | |
f4dc4d17 DE |
6616 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6617 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6618 | of any one psymtab grow too big. */ | |
6619 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6620 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6621 | |
094b34ac | 6622 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6623 | Create the type_unit_group object used to hold one or more TUs. */ |
6624 | ||
6625 | static struct type_unit_group * | |
094b34ac | 6626 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6627 | { |
6628 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6629 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6630 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6631 | |
6632 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6633 | struct type_unit_group); | |
094b34ac | 6634 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6635 | per_cu->objfile = objfile; |
f4dc4d17 | 6636 | |
094b34ac DE |
6637 | if (dwarf2_per_objfile->using_index) |
6638 | { | |
6639 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6640 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6641 | } |
6642 | else | |
6643 | { | |
9c541725 | 6644 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6645 | struct partial_symtab *pst; |
6646 | char *name; | |
6647 | ||
6648 | /* Give the symtab a useful name for debug purposes. */ | |
6649 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6650 | name = xstrprintf ("<type_units_%d>", | |
6651 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6652 | else | |
6653 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6654 | ||
6655 | pst = create_partial_symtab (per_cu, name); | |
6656 | pst->anonymous = 1; | |
f4dc4d17 | 6657 | |
094b34ac DE |
6658 | xfree (name); |
6659 | } | |
f4dc4d17 | 6660 | |
094b34ac | 6661 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6662 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6663 | |
6664 | return tu_group; | |
6665 | } | |
6666 | ||
094b34ac DE |
6667 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6668 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6669 | |
6670 | static struct type_unit_group * | |
ff39bb5e | 6671 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6672 | { |
6673 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6674 | struct type_unit_group *tu_group; | |
6675 | void **slot; | |
6676 | unsigned int line_offset; | |
6677 | struct type_unit_group type_unit_group_for_lookup; | |
6678 | ||
6679 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6680 | { | |
6681 | dwarf2_per_objfile->type_unit_groups = | |
6682 | allocate_type_unit_groups_table (); | |
6683 | } | |
6684 | ||
6685 | /* Do we need to create a new group, or can we use an existing one? */ | |
6686 | ||
6687 | if (stmt_list) | |
6688 | { | |
6689 | line_offset = DW_UNSND (stmt_list); | |
6690 | ++tu_stats->nr_symtab_sharers; | |
6691 | } | |
6692 | else | |
6693 | { | |
6694 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6695 | We can do various things here like create one group per TU or | |
6696 | spread them over multiple groups to split up the expansion work. | |
6697 | To avoid worst case scenarios (too many groups or too large groups) | |
6698 | we, umm, group them in bunches. */ | |
6699 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6700 | | (tu_stats->nr_stmt_less_type_units | |
6701 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6702 | ++tu_stats->nr_stmt_less_type_units; | |
6703 | } | |
6704 | ||
094b34ac | 6705 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6706 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6707 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6708 | &type_unit_group_for_lookup, INSERT); | |
6709 | if (*slot != NULL) | |
6710 | { | |
9a3c8263 | 6711 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6712 | gdb_assert (tu_group != NULL); |
6713 | } | |
6714 | else | |
6715 | { | |
9c541725 | 6716 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6717 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6718 | *slot = tu_group; |
6719 | ++tu_stats->nr_symtabs; | |
6720 | } | |
6721 | ||
6722 | return tu_group; | |
6723 | } | |
0018ea6f DE |
6724 | \f |
6725 | /* Partial symbol tables. */ | |
6726 | ||
6727 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6728 | ||
6729 | The caller must fill in the following details: | |
6730 | dirname, textlow, texthigh. */ | |
6731 | ||
6732 | static struct partial_symtab * | |
6733 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
6734 | { | |
6735 | struct objfile *objfile = per_cu->objfile; | |
6736 | struct partial_symtab *pst; | |
6737 | ||
18a94d75 | 6738 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
6739 | objfile->global_psymbols, |
6740 | objfile->static_psymbols); | |
0018ea6f DE |
6741 | |
6742 | pst->psymtabs_addrmap_supported = 1; | |
6743 | ||
6744 | /* This is the glue that links PST into GDB's symbol API. */ | |
6745 | pst->read_symtab_private = per_cu; | |
6746 | pst->read_symtab = dwarf2_read_symtab; | |
6747 | per_cu->v.psymtab = pst; | |
6748 | ||
6749 | return pst; | |
6750 | } | |
6751 | ||
b93601f3 TT |
6752 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
6753 | type. */ | |
6754 | ||
6755 | struct process_psymtab_comp_unit_data | |
6756 | { | |
6757 | /* True if we are reading a DW_TAG_partial_unit. */ | |
6758 | ||
6759 | int want_partial_unit; | |
6760 | ||
6761 | /* The "pretend" language that is used if the CU doesn't declare a | |
6762 | language. */ | |
6763 | ||
6764 | enum language pretend_language; | |
6765 | }; | |
6766 | ||
0018ea6f DE |
6767 | /* die_reader_func for process_psymtab_comp_unit. */ |
6768 | ||
6769 | static void | |
6770 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6771 | const gdb_byte *info_ptr, |
0018ea6f DE |
6772 | struct die_info *comp_unit_die, |
6773 | int has_children, | |
6774 | void *data) | |
6775 | { | |
6776 | struct dwarf2_cu *cu = reader->cu; | |
6777 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 6778 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 6779 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
6780 | CORE_ADDR baseaddr; |
6781 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
6782 | struct partial_symtab *pst; | |
3a2b436a | 6783 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 6784 | const char *filename; |
9a3c8263 SM |
6785 | struct process_psymtab_comp_unit_data *info |
6786 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 6787 | |
b93601f3 | 6788 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
6789 | return; |
6790 | ||
6791 | gdb_assert (! per_cu->is_debug_types); | |
6792 | ||
b93601f3 | 6793 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
6794 | |
6795 | cu->list_in_scope = &file_symbols; | |
6796 | ||
6797 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
6798 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
6799 | if (filename == NULL) | |
0018ea6f | 6800 | filename = ""; |
0018ea6f DE |
6801 | |
6802 | pst = create_partial_symtab (per_cu, filename); | |
6803 | ||
6804 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 6805 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
6806 | |
6807 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6808 | ||
6809 | dwarf2_find_base_address (comp_unit_die, cu); | |
6810 | ||
6811 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6812 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6813 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6814 | &best_highpc, cu, pst); | |
6815 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
6816 | /* Store the contiguous range if it is not empty; it can be empty for |
6817 | CUs with no code. */ | |
6818 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
6819 | gdbarch_adjust_dwarf2_addr (gdbarch, |
6820 | best_lowpc + baseaddr), | |
6821 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
6822 | best_highpc + baseaddr) - 1, | |
6823 | pst); | |
0018ea6f DE |
6824 | |
6825 | /* Check if comp unit has_children. | |
6826 | If so, read the rest of the partial symbols from this comp unit. | |
6827 | If not, there's no more debug_info for this comp unit. */ | |
6828 | if (has_children) | |
6829 | { | |
6830 | struct partial_die_info *first_die; | |
6831 | CORE_ADDR lowpc, highpc; | |
6832 | ||
6833 | lowpc = ((CORE_ADDR) -1); | |
6834 | highpc = ((CORE_ADDR) 0); | |
6835 | ||
6836 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6837 | ||
6838 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6839 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6840 | |
6841 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6842 | complaints from `maint check'. */ | |
6843 | if (lowpc == ((CORE_ADDR) -1)) | |
6844 | lowpc = highpc; | |
6845 | ||
6846 | /* If the compilation unit didn't have an explicit address range, | |
6847 | then use the information extracted from its child dies. */ | |
e385593e | 6848 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6849 | { |
6850 | best_lowpc = lowpc; | |
6851 | best_highpc = highpc; | |
6852 | } | |
6853 | } | |
3e29f34a MR |
6854 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6855 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6856 | |
8763cede | 6857 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6858 | |
6859 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6860 | { | |
6861 | int i; | |
6862 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6863 | struct dwarf2_per_cu_data *iter; | |
6864 | ||
6865 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6866 | post-pass. */ | |
6867 | pst->number_of_dependencies = len; | |
8d749320 SM |
6868 | pst->dependencies = |
6869 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6870 | for (i = 0; |
6871 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6872 | i, iter); | |
6873 | ++i) | |
6874 | pst->dependencies[i] = iter->v.psymtab; | |
6875 | ||
6876 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6877 | } | |
6878 | ||
6879 | /* Get the list of files included in the current compilation unit, | |
6880 | and build a psymtab for each of them. */ | |
6881 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6882 | ||
b4f54984 | 6883 | if (dwarf_read_debug) |
0018ea6f DE |
6884 | { |
6885 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6886 | ||
6887 | fprintf_unfiltered (gdb_stdlog, | |
6888 | "Psymtab for %s unit @0x%x: %s - %s" | |
6889 | ", %d global, %d static syms\n", | |
6890 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6891 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
6892 | paddress (gdbarch, pst->textlow), |
6893 | paddress (gdbarch, pst->texthigh), | |
6894 | pst->n_global_syms, pst->n_static_syms); | |
6895 | } | |
6896 | } | |
6897 | ||
6898 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6899 | Process compilation unit THIS_CU for a psymtab. */ | |
6900 | ||
6901 | static void | |
6902 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6903 | int want_partial_unit, |
6904 | enum language pretend_language) | |
0018ea6f DE |
6905 | { |
6906 | /* If this compilation unit was already read in, free the | |
6907 | cached copy in order to read it in again. This is | |
6908 | necessary because we skipped some symbols when we first | |
6909 | read in the compilation unit (see load_partial_dies). | |
6910 | This problem could be avoided, but the benefit is unclear. */ | |
6911 | if (this_cu->cu != NULL) | |
6912 | free_one_cached_comp_unit (this_cu); | |
6913 | ||
f1902523 JK |
6914 | if (this_cu->is_debug_types) |
6915 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
6916 | NULL); | |
6917 | else | |
6918 | { | |
6919 | process_psymtab_comp_unit_data info; | |
6920 | info.want_partial_unit = want_partial_unit; | |
6921 | info.pretend_language = pretend_language; | |
6922 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
6923 | process_psymtab_comp_unit_reader, &info); | |
6924 | } | |
0018ea6f DE |
6925 | |
6926 | /* Age out any secondary CUs. */ | |
6927 | age_cached_comp_units (); | |
6928 | } | |
f4dc4d17 DE |
6929 | |
6930 | /* Reader function for build_type_psymtabs. */ | |
6931 | ||
6932 | static void | |
6933 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6934 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6935 | struct die_info *type_unit_die, |
6936 | int has_children, | |
6937 | void *data) | |
6938 | { | |
6939 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6940 | struct dwarf2_cu *cu = reader->cu; | |
6941 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6942 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6943 | struct type_unit_group *tu_group; |
6944 | struct attribute *attr; | |
6945 | struct partial_die_info *first_die; | |
6946 | CORE_ADDR lowpc, highpc; | |
6947 | struct partial_symtab *pst; | |
6948 | ||
6949 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6950 | gdb_assert (per_cu->is_debug_types); |
6951 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6952 | |
6953 | if (! has_children) | |
6954 | return; | |
6955 | ||
6956 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6957 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6958 | |
0186c6a7 | 6959 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6960 | |
6961 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6962 | cu->list_in_scope = &file_symbols; | |
6963 | pst = create_partial_symtab (per_cu, ""); | |
6964 | pst->anonymous = 1; | |
6965 | ||
6966 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6967 | ||
6968 | lowpc = (CORE_ADDR) -1; | |
6969 | highpc = (CORE_ADDR) 0; | |
6970 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6971 | ||
8763cede | 6972 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6973 | } |
6974 | ||
73051182 DE |
6975 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6976 | ||
6977 | struct tu_abbrev_offset | |
6978 | { | |
6979 | struct signatured_type *sig_type; | |
6980 | sect_offset abbrev_offset; | |
6981 | }; | |
6982 | ||
6983 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6984 | ||
6985 | static int | |
6986 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6987 | { | |
9a3c8263 SM |
6988 | const struct tu_abbrev_offset * const *a |
6989 | = (const struct tu_abbrev_offset * const*) ap; | |
6990 | const struct tu_abbrev_offset * const *b | |
6991 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
6992 | sect_offset aoff = (*a)->abbrev_offset; |
6993 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
6994 | |
6995 | return (aoff > boff) - (aoff < boff); | |
6996 | } | |
6997 | ||
6998 | /* Efficiently read all the type units. | |
6999 | This does the bulk of the work for build_type_psymtabs. | |
7000 | ||
7001 | The efficiency is because we sort TUs by the abbrev table they use and | |
7002 | only read each abbrev table once. In one program there are 200K TUs | |
7003 | sharing 8K abbrev tables. | |
7004 | ||
7005 | The main purpose of this function is to support building the | |
7006 | dwarf2_per_objfile->type_unit_groups table. | |
7007 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7008 | can collapse the search space by grouping them by stmt_list. | |
7009 | The savings can be significant, in the same program from above the 200K TUs | |
7010 | share 8K stmt_list tables. | |
7011 | ||
7012 | FUNC is expected to call get_type_unit_group, which will create the | |
7013 | struct type_unit_group if necessary and add it to | |
7014 | dwarf2_per_objfile->type_unit_groups. */ | |
7015 | ||
7016 | static void | |
7017 | build_type_psymtabs_1 (void) | |
7018 | { | |
73051182 DE |
7019 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7020 | struct cleanup *cleanups; | |
7021 | struct abbrev_table *abbrev_table; | |
7022 | sect_offset abbrev_offset; | |
7023 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
7024 | int i; |
7025 | ||
7026 | /* It's up to the caller to not call us multiple times. */ | |
7027 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7028 | ||
7029 | if (dwarf2_per_objfile->n_type_units == 0) | |
7030 | return; | |
7031 | ||
7032 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7033 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7034 | read each abbrev table in. | |
7035 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7036 | This is simpler and efficient enough for now. | |
7037 | ||
7038 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7039 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7040 | stmt_list value too so in practice this should work well. | |
7041 | ||
7042 | The basic algorithm here is: | |
7043 | ||
7044 | sort TUs by abbrev table | |
7045 | for each TU with same abbrev table: | |
7046 | read abbrev table if first user | |
7047 | read TU top level DIE | |
7048 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7049 | call FUNC */ | |
7050 | ||
b4f54984 | 7051 | if (dwarf_read_debug) |
73051182 DE |
7052 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7053 | ||
7054 | /* Sort in a separate table to maintain the order of all_type_units | |
7055 | for .gdb_index: TU indices directly index all_type_units. */ | |
7056 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
7057 | dwarf2_per_objfile->n_type_units); | |
7058 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7059 | { | |
7060 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
7061 | ||
7062 | sorted_by_abbrev[i].sig_type = sig_type; | |
7063 | sorted_by_abbrev[i].abbrev_offset = | |
7064 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 7065 | sig_type->per_cu.sect_off); |
73051182 DE |
7066 | } |
7067 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
7068 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
7069 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
7070 | ||
9c541725 | 7071 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
7072 | abbrev_table = NULL; |
7073 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
7074 | ||
7075 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7076 | { | |
7077 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
7078 | ||
7079 | /* Switch to the next abbrev table if necessary. */ | |
7080 | if (abbrev_table == NULL | |
9c541725 | 7081 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
7082 | { |
7083 | if (abbrev_table != NULL) | |
7084 | { | |
7085 | abbrev_table_free (abbrev_table); | |
7086 | /* Reset to NULL in case abbrev_table_read_table throws | |
7087 | an error: abbrev_table_free_cleanup will get called. */ | |
7088 | abbrev_table = NULL; | |
7089 | } | |
7090 | abbrev_offset = tu->abbrev_offset; | |
7091 | abbrev_table = | |
7092 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
7093 | abbrev_offset); | |
7094 | ++tu_stats->nr_uniq_abbrev_tables; | |
7095 | } | |
7096 | ||
7097 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
7098 | build_type_psymtabs_reader, NULL); | |
7099 | } | |
7100 | ||
73051182 | 7101 | do_cleanups (cleanups); |
6aa5f3a6 | 7102 | } |
73051182 | 7103 | |
6aa5f3a6 DE |
7104 | /* Print collected type unit statistics. */ |
7105 | ||
7106 | static void | |
7107 | print_tu_stats (void) | |
7108 | { | |
7109 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7110 | ||
7111 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
7112 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
7113 | dwarf2_per_objfile->n_type_units); | |
7114 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
7115 | tu_stats->nr_uniq_abbrev_tables); | |
7116 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7117 | tu_stats->nr_symtabs); | |
7118 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7119 | tu_stats->nr_symtab_sharers); | |
7120 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7121 | tu_stats->nr_stmt_less_type_units); | |
7122 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7123 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7124 | } |
7125 | ||
f4dc4d17 DE |
7126 | /* Traversal function for build_type_psymtabs. */ |
7127 | ||
7128 | static int | |
7129 | build_type_psymtab_dependencies (void **slot, void *info) | |
7130 | { | |
7131 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7132 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7133 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 7134 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
7135 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
7136 | struct signatured_type *iter; | |
f4dc4d17 DE |
7137 | int i; |
7138 | ||
7139 | gdb_assert (len > 0); | |
0186c6a7 | 7140 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
7141 | |
7142 | pst->number_of_dependencies = len; | |
8d749320 SM |
7143 | pst->dependencies = |
7144 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 7145 | for (i = 0; |
0186c6a7 | 7146 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
7147 | ++i) |
7148 | { | |
0186c6a7 DE |
7149 | gdb_assert (iter->per_cu.is_debug_types); |
7150 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7151 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7152 | } |
7153 | ||
0186c6a7 | 7154 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
7155 | |
7156 | return 1; | |
7157 | } | |
7158 | ||
7159 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7160 | Build partial symbol tables for the .debug_types comp-units. */ | |
7161 | ||
7162 | static void | |
7163 | build_type_psymtabs (struct objfile *objfile) | |
7164 | { | |
0e50663e | 7165 | if (! create_all_type_units (objfile)) |
348e048f DE |
7166 | return; |
7167 | ||
73051182 | 7168 | build_type_psymtabs_1 (); |
6aa5f3a6 | 7169 | } |
f4dc4d17 | 7170 | |
6aa5f3a6 DE |
7171 | /* Traversal function for process_skeletonless_type_unit. |
7172 | Read a TU in a DWO file and build partial symbols for it. */ | |
7173 | ||
7174 | static int | |
7175 | process_skeletonless_type_unit (void **slot, void *info) | |
7176 | { | |
7177 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 7178 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
7179 | struct signatured_type find_entry, *entry; |
7180 | ||
7181 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7182 | ||
7183 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7184 | { | |
7185 | dwarf2_per_objfile->signatured_types | |
7186 | = allocate_signatured_type_table (objfile); | |
7187 | } | |
7188 | ||
7189 | find_entry.signature = dwo_unit->signature; | |
7190 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
7191 | INSERT); | |
7192 | /* If we've already seen this type there's nothing to do. What's happening | |
7193 | is we're doing our own version of comdat-folding here. */ | |
7194 | if (*slot != NULL) | |
7195 | return 1; | |
7196 | ||
7197 | /* This does the job that create_all_type_units would have done for | |
7198 | this TU. */ | |
7199 | entry = add_type_unit (dwo_unit->signature, slot); | |
7200 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
7201 | *slot = entry; | |
7202 | ||
7203 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
7204 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
7205 | build_type_psymtabs_reader, NULL); | |
7206 | ||
7207 | return 1; | |
7208 | } | |
7209 | ||
7210 | /* Traversal function for process_skeletonless_type_units. */ | |
7211 | ||
7212 | static int | |
7213 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7214 | { | |
7215 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7216 | ||
7217 | if (dwo_file->tus != NULL) | |
7218 | { | |
7219 | htab_traverse_noresize (dwo_file->tus, | |
7220 | process_skeletonless_type_unit, info); | |
7221 | } | |
7222 | ||
7223 | return 1; | |
7224 | } | |
7225 | ||
7226 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7227 | This is needed in case a TU was emitted without its skeleton. | |
7228 | Note: This can't be done until we know what all the DWO files are. */ | |
7229 | ||
7230 | static void | |
7231 | process_skeletonless_type_units (struct objfile *objfile) | |
7232 | { | |
7233 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
7234 | if (get_dwp_file () == NULL | |
7235 | && dwarf2_per_objfile->dwo_files != NULL) | |
7236 | { | |
7237 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
7238 | process_dwo_file_for_skeletonless_type_units, | |
7239 | objfile); | |
7240 | } | |
348e048f DE |
7241 | } |
7242 | ||
95554aad TT |
7243 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
7244 | ||
7245 | static void | |
7246 | set_partial_user (struct objfile *objfile) | |
7247 | { | |
7248 | int i; | |
7249 | ||
7250 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
7251 | { | |
8832e7e3 | 7252 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
7253 | struct partial_symtab *pst = per_cu->v.psymtab; |
7254 | int j; | |
7255 | ||
36586728 TT |
7256 | if (pst == NULL) |
7257 | continue; | |
7258 | ||
95554aad TT |
7259 | for (j = 0; j < pst->number_of_dependencies; ++j) |
7260 | { | |
7261 | /* Set the 'user' field only if it is not already set. */ | |
7262 | if (pst->dependencies[j]->user == NULL) | |
7263 | pst->dependencies[j]->user = pst; | |
7264 | } | |
7265 | } | |
7266 | } | |
7267 | ||
93311388 DE |
7268 | /* Build the partial symbol table by doing a quick pass through the |
7269 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7270 | |
93311388 | 7271 | static void |
c67a9c90 | 7272 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 7273 | { |
791afaa2 | 7274 | struct cleanup *back_to; |
21b2bd31 | 7275 | int i; |
93311388 | 7276 | |
b4f54984 | 7277 | if (dwarf_read_debug) |
45cfd468 DE |
7278 | { |
7279 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7280 | objfile_name (objfile)); |
45cfd468 DE |
7281 | } |
7282 | ||
98bfdba5 PA |
7283 | dwarf2_per_objfile->reading_partial_symbols = 1; |
7284 | ||
be391dca | 7285 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 7286 | |
93311388 DE |
7287 | /* Any cached compilation units will be linked by the per-objfile |
7288 | read_in_chain. Make sure to free them when we're done. */ | |
7289 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 7290 | |
348e048f DE |
7291 | build_type_psymtabs (objfile); |
7292 | ||
93311388 | 7293 | create_all_comp_units (objfile); |
c906108c | 7294 | |
60606b2c TT |
7295 | /* Create a temporary address map on a temporary obstack. We later |
7296 | copy this to the final obstack. */ | |
8268c778 | 7297 | auto_obstack temp_obstack; |
791afaa2 TT |
7298 | |
7299 | scoped_restore save_psymtabs_addrmap | |
7300 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
7301 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 7302 | |
21b2bd31 | 7303 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 7304 | { |
8832e7e3 | 7305 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 7306 | |
b93601f3 | 7307 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 7308 | } |
ff013f42 | 7309 | |
6aa5f3a6 DE |
7310 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
7311 | process_skeletonless_type_units (objfile); | |
7312 | ||
7313 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7314 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7315 | { | |
7316 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
7317 | build_type_psymtab_dependencies, NULL); | |
7318 | } | |
7319 | ||
b4f54984 | 7320 | if (dwarf_read_debug) |
6aa5f3a6 DE |
7321 | print_tu_stats (); |
7322 | ||
95554aad TT |
7323 | set_partial_user (objfile); |
7324 | ||
ff013f42 JK |
7325 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
7326 | &objfile->objfile_obstack); | |
791afaa2 TT |
7327 | /* At this point we want to keep the address map. */ |
7328 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7329 | |
ae038cb0 | 7330 | do_cleanups (back_to); |
45cfd468 | 7331 | |
b4f54984 | 7332 | if (dwarf_read_debug) |
45cfd468 | 7333 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7334 | objfile_name (objfile)); |
ae038cb0 DJ |
7335 | } |
7336 | ||
3019eac3 | 7337 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
7338 | |
7339 | static void | |
dee91e82 | 7340 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 7341 | const gdb_byte *info_ptr, |
dee91e82 DE |
7342 | struct die_info *comp_unit_die, |
7343 | int has_children, | |
7344 | void *data) | |
ae038cb0 | 7345 | { |
dee91e82 | 7346 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 7347 | |
95554aad | 7348 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 7349 | |
ae038cb0 DJ |
7350 | /* Check if comp unit has_children. |
7351 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 7352 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 7353 | if (has_children) |
dee91e82 DE |
7354 | load_partial_dies (reader, info_ptr, 0); |
7355 | } | |
98bfdba5 | 7356 | |
dee91e82 DE |
7357 | /* Load the partial DIEs for a secondary CU into memory. |
7358 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7359 | |
dee91e82 DE |
7360 | static void |
7361 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7362 | { | |
f4dc4d17 DE |
7363 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7364 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
7365 | } |
7366 | ||
ae038cb0 | 7367 | static void |
36586728 TT |
7368 | read_comp_units_from_section (struct objfile *objfile, |
7369 | struct dwarf2_section_info *section, | |
f1902523 | 7370 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
7371 | unsigned int is_dwz, |
7372 | int *n_allocated, | |
7373 | int *n_comp_units, | |
7374 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 7375 | { |
d521ce57 | 7376 | const gdb_byte *info_ptr; |
a32a8923 | 7377 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 7378 | |
b4f54984 | 7379 | if (dwarf_read_debug) |
bf6af496 | 7380 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
7381 | get_section_name (section), |
7382 | get_section_file_name (section)); | |
bf6af496 | 7383 | |
36586728 | 7384 | dwarf2_read_section (objfile, section); |
ae038cb0 | 7385 | |
36586728 | 7386 | info_ptr = section->buffer; |
6e70227d | 7387 | |
36586728 | 7388 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7389 | { |
ae038cb0 | 7390 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7391 | |
9c541725 | 7392 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7393 | |
f1902523 JK |
7394 | comp_unit_head cu_header; |
7395 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
7396 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7397 | |
7398 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7399 | if (cu_header.unit_type != DW_UT_type) |
7400 | { | |
7401 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7402 | struct dwarf2_per_cu_data); | |
7403 | memset (this_cu, 0, sizeof (*this_cu)); | |
7404 | } | |
7405 | else | |
7406 | { | |
7407 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7408 | struct signatured_type); | |
7409 | memset (sig_type, 0, sizeof (*sig_type)); | |
7410 | sig_type->signature = cu_header.signature; | |
7411 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7412 | this_cu = &sig_type->per_cu; | |
7413 | } | |
7414 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7415 | this_cu->sect_off = sect_off; |
f1902523 | 7416 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7417 | this_cu->is_dwz = is_dwz; |
9291a0cd | 7418 | this_cu->objfile = objfile; |
8a0459fd | 7419 | this_cu->section = section; |
ae038cb0 | 7420 | |
36586728 | 7421 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 7422 | { |
36586728 | 7423 | *n_allocated *= 2; |
224c3ddb SM |
7424 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
7425 | *all_comp_units, *n_allocated); | |
ae038cb0 | 7426 | } |
36586728 TT |
7427 | (*all_comp_units)[*n_comp_units] = this_cu; |
7428 | ++*n_comp_units; | |
ae038cb0 DJ |
7429 | |
7430 | info_ptr = info_ptr + this_cu->length; | |
7431 | } | |
36586728 TT |
7432 | } |
7433 | ||
7434 | /* Create a list of all compilation units in OBJFILE. | |
7435 | This is only done for -readnow and building partial symtabs. */ | |
7436 | ||
7437 | static void | |
7438 | create_all_comp_units (struct objfile *objfile) | |
7439 | { | |
7440 | int n_allocated; | |
7441 | int n_comp_units; | |
7442 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 7443 | struct dwz_file *dwz; |
36586728 TT |
7444 | |
7445 | n_comp_units = 0; | |
7446 | n_allocated = 10; | |
8d749320 | 7447 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 7448 | |
f1902523 JK |
7449 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
7450 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
7451 | &n_allocated, &n_comp_units, &all_comp_units); |
7452 | ||
4db1a1dc TT |
7453 | dwz = dwarf2_get_dwz_file (); |
7454 | if (dwz != NULL) | |
f1902523 | 7455 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
7456 | &n_allocated, &n_comp_units, |
7457 | &all_comp_units); | |
ae038cb0 | 7458 | |
8d749320 SM |
7459 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
7460 | struct dwarf2_per_cu_data *, | |
7461 | n_comp_units); | |
ae038cb0 DJ |
7462 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
7463 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
7464 | xfree (all_comp_units); | |
7465 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
7466 | } |
7467 | ||
5734ee8b | 7468 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7469 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7470 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7471 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7472 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7473 | |
72bf9492 DJ |
7474 | static void |
7475 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7476 | CORE_ADDR *highpc, int set_addrmap, |
7477 | struct dwarf2_cu *cu) | |
c906108c | 7478 | { |
72bf9492 | 7479 | struct partial_die_info *pdi; |
c906108c | 7480 | |
91c24f0a DC |
7481 | /* Now, march along the PDI's, descending into ones which have |
7482 | interesting children but skipping the children of the other ones, | |
7483 | until we reach the end of the compilation unit. */ | |
c906108c | 7484 | |
72bf9492 | 7485 | pdi = first_die; |
91c24f0a | 7486 | |
72bf9492 DJ |
7487 | while (pdi != NULL) |
7488 | { | |
7489 | fixup_partial_die (pdi, cu); | |
c906108c | 7490 | |
f55ee35c | 7491 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7492 | children, so we need to look at them. Ditto for anonymous |
7493 | enums. */ | |
933c6fe4 | 7494 | |
72bf9492 | 7495 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
7496 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
7497 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 7498 | { |
72bf9492 | 7499 | switch (pdi->tag) |
c906108c SS |
7500 | { |
7501 | case DW_TAG_subprogram: | |
cdc07690 | 7502 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7503 | break; |
72929c62 | 7504 | case DW_TAG_constant: |
c906108c SS |
7505 | case DW_TAG_variable: |
7506 | case DW_TAG_typedef: | |
91c24f0a | 7507 | case DW_TAG_union_type: |
72bf9492 | 7508 | if (!pdi->is_declaration) |
63d06c5c | 7509 | { |
72bf9492 | 7510 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7511 | } |
7512 | break; | |
c906108c | 7513 | case DW_TAG_class_type: |
680b30c7 | 7514 | case DW_TAG_interface_type: |
c906108c | 7515 | case DW_TAG_structure_type: |
72bf9492 | 7516 | if (!pdi->is_declaration) |
c906108c | 7517 | { |
72bf9492 | 7518 | add_partial_symbol (pdi, cu); |
c906108c | 7519 | } |
e98c9e7c TT |
7520 | if (cu->language == language_rust && pdi->has_children) |
7521 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
7522 | set_addrmap, cu); | |
c906108c | 7523 | break; |
91c24f0a | 7524 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7525 | if (!pdi->is_declaration) |
7526 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7527 | break; |
7528 | case DW_TAG_base_type: | |
a02abb62 | 7529 | case DW_TAG_subrange_type: |
c906108c | 7530 | /* File scope base type definitions are added to the partial |
c5aa993b | 7531 | symbol table. */ |
72bf9492 | 7532 | add_partial_symbol (pdi, cu); |
c906108c | 7533 | break; |
d9fa45fe | 7534 | case DW_TAG_namespace: |
cdc07690 | 7535 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7536 | break; |
5d7cb8df | 7537 | case DW_TAG_module: |
cdc07690 | 7538 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 7539 | break; |
95554aad TT |
7540 | case DW_TAG_imported_unit: |
7541 | { | |
7542 | struct dwarf2_per_cu_data *per_cu; | |
7543 | ||
f4dc4d17 DE |
7544 | /* For now we don't handle imported units in type units. */ |
7545 | if (cu->per_cu->is_debug_types) | |
7546 | { | |
7547 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7548 | " supported in type units [in module %s]"), | |
4262abfb | 7549 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
7550 | } |
7551 | ||
9c541725 | 7552 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 7553 | pdi->is_dwz, |
95554aad TT |
7554 | cu->objfile); |
7555 | ||
7556 | /* Go read the partial unit, if needed. */ | |
7557 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 7558 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 7559 | |
f4dc4d17 | 7560 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 7561 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
7562 | } |
7563 | break; | |
74921315 KS |
7564 | case DW_TAG_imported_declaration: |
7565 | add_partial_symbol (pdi, cu); | |
7566 | break; | |
c906108c SS |
7567 | default: |
7568 | break; | |
7569 | } | |
7570 | } | |
7571 | ||
72bf9492 DJ |
7572 | /* If the die has a sibling, skip to the sibling. */ |
7573 | ||
7574 | pdi = pdi->die_sibling; | |
7575 | } | |
7576 | } | |
7577 | ||
7578 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7579 | |
72bf9492 | 7580 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7581 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7582 | Enumerators are an exception; they use the scope of their parent |
7583 | enumeration type, i.e. the name of the enumeration type is not | |
7584 | prepended to the enumerator. | |
91c24f0a | 7585 | |
72bf9492 DJ |
7586 | There are two complexities. One is DW_AT_specification; in this |
7587 | case "parent" means the parent of the target of the specification, | |
7588 | instead of the direct parent of the DIE. The other is compilers | |
7589 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7590 | the fully qualified name of structure types from their members' | |
7591 | linkage names. This must be done using the DIE's children rather | |
7592 | than the children of any DW_AT_specification target. We only need | |
7593 | to do this for structures at the top level, i.e. if the target of | |
7594 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7595 | have a parent. */ | |
7596 | ||
7597 | /* Compute the scope prefix associated with PDI's parent, in | |
7598 | compilation unit CU. The result will be allocated on CU's | |
7599 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7600 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7601 | static const char * |
72bf9492 DJ |
7602 | partial_die_parent_scope (struct partial_die_info *pdi, |
7603 | struct dwarf2_cu *cu) | |
7604 | { | |
15d034d0 | 7605 | const char *grandparent_scope; |
72bf9492 | 7606 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7607 | |
72bf9492 DJ |
7608 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7609 | then this means the parent of the specification DIE. */ | |
7610 | ||
7611 | real_pdi = pdi; | |
72bf9492 | 7612 | while (real_pdi->has_specification) |
36586728 TT |
7613 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7614 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7615 | |
7616 | parent = real_pdi->die_parent; | |
7617 | if (parent == NULL) | |
7618 | return NULL; | |
7619 | ||
7620 | if (parent->scope_set) | |
7621 | return parent->scope; | |
7622 | ||
7623 | fixup_partial_die (parent, cu); | |
7624 | ||
10b3939b | 7625 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7626 | |
acebe513 UW |
7627 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7628 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7629 | Work around this problem here. */ | |
7630 | if (cu->language == language_cplus | |
6e70227d | 7631 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7632 | && strcmp (parent->name, "::") == 0 |
7633 | && grandparent_scope == NULL) | |
7634 | { | |
7635 | parent->scope = NULL; | |
7636 | parent->scope_set = 1; | |
7637 | return NULL; | |
7638 | } | |
7639 | ||
9c6c53f7 SA |
7640 | if (pdi->tag == DW_TAG_enumerator) |
7641 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7642 | parent->scope = grandparent_scope; | |
7643 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7644 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7645 | || parent->tag == DW_TAG_structure_type |
7646 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7647 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7648 | || parent->tag == DW_TAG_union_type |
7649 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7650 | { |
7651 | if (grandparent_scope == NULL) | |
7652 | parent->scope = parent->name; | |
7653 | else | |
3e43a32a MS |
7654 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7655 | grandparent_scope, | |
f55ee35c | 7656 | parent->name, 0, cu); |
72bf9492 | 7657 | } |
72bf9492 DJ |
7658 | else |
7659 | { | |
7660 | /* FIXME drow/2004-04-01: What should we be doing with | |
7661 | function-local names? For partial symbols, we should probably be | |
7662 | ignoring them. */ | |
7663 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7664 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7665 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7666 | parent->scope = grandparent_scope; |
c906108c SS |
7667 | } |
7668 | ||
72bf9492 DJ |
7669 | parent->scope_set = 1; |
7670 | return parent->scope; | |
7671 | } | |
7672 | ||
7673 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7674 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7675 | |
72bf9492 DJ |
7676 | static char * |
7677 | partial_die_full_name (struct partial_die_info *pdi, | |
7678 | struct dwarf2_cu *cu) | |
7679 | { | |
15d034d0 | 7680 | const char *parent_scope; |
72bf9492 | 7681 | |
98bfdba5 PA |
7682 | /* If this is a template instantiation, we can not work out the |
7683 | template arguments from partial DIEs. So, unfortunately, we have | |
7684 | to go through the full DIEs. At least any work we do building | |
7685 | types here will be reused if full symbols are loaded later. */ | |
7686 | if (pdi->has_template_arguments) | |
7687 | { | |
7688 | fixup_partial_die (pdi, cu); | |
7689 | ||
7690 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7691 | { | |
7692 | struct die_info *die; | |
7693 | struct attribute attr; | |
7694 | struct dwarf2_cu *ref_cu = cu; | |
7695 | ||
b64f50a1 | 7696 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7697 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7698 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7699 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7700 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7701 | ||
7702 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7703 | } | |
7704 | } | |
7705 | ||
72bf9492 DJ |
7706 | parent_scope = partial_die_parent_scope (pdi, cu); |
7707 | if (parent_scope == NULL) | |
7708 | return NULL; | |
7709 | else | |
f55ee35c | 7710 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7711 | } |
7712 | ||
7713 | static void | |
72bf9492 | 7714 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7715 | { |
e7c27a73 | 7716 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7717 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7718 | CORE_ADDR addr = 0; |
15d034d0 | 7719 | const char *actual_name = NULL; |
e142c38c | 7720 | CORE_ADDR baseaddr; |
15d034d0 | 7721 | char *built_actual_name; |
e142c38c DJ |
7722 | |
7723 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7724 | |
15d034d0 TT |
7725 | built_actual_name = partial_die_full_name (pdi, cu); |
7726 | if (built_actual_name != NULL) | |
7727 | actual_name = built_actual_name; | |
63d06c5c | 7728 | |
72bf9492 DJ |
7729 | if (actual_name == NULL) |
7730 | actual_name = pdi->name; | |
7731 | ||
c906108c SS |
7732 | switch (pdi->tag) |
7733 | { | |
7734 | case DW_TAG_subprogram: | |
3e29f34a | 7735 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 7736 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 7737 | { |
2cfa0c8d JB |
7738 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
7739 | of the global scope. But in Ada, we want to be able to access | |
7740 | nested procedures globally. So all Ada subprograms are stored | |
7741 | in the global scope. */ | |
f47fb265 | 7742 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7743 | built_actual_name != NULL, |
f47fb265 MS |
7744 | VAR_DOMAIN, LOC_BLOCK, |
7745 | &objfile->global_psymbols, | |
1762568f | 7746 | addr, cu->language, objfile); |
c906108c SS |
7747 | } |
7748 | else | |
7749 | { | |
f47fb265 | 7750 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7751 | built_actual_name != NULL, |
f47fb265 MS |
7752 | VAR_DOMAIN, LOC_BLOCK, |
7753 | &objfile->static_psymbols, | |
1762568f | 7754 | addr, cu->language, objfile); |
c906108c | 7755 | } |
0c1b455e TT |
7756 | |
7757 | if (pdi->main_subprogram && actual_name != NULL) | |
7758 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7759 | break; |
72929c62 JB |
7760 | case DW_TAG_constant: |
7761 | { | |
af5bf4ad | 7762 | std::vector<partial_symbol *> *list; |
72929c62 JB |
7763 | |
7764 | if (pdi->is_external) | |
7765 | list = &objfile->global_psymbols; | |
7766 | else | |
7767 | list = &objfile->static_psymbols; | |
f47fb265 | 7768 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7769 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 7770 | list, 0, cu->language, objfile); |
72929c62 JB |
7771 | } |
7772 | break; | |
c906108c | 7773 | case DW_TAG_variable: |
95554aad TT |
7774 | if (pdi->d.locdesc) |
7775 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 7776 | |
95554aad | 7777 | if (pdi->d.locdesc |
caac4577 JG |
7778 | && addr == 0 |
7779 | && !dwarf2_per_objfile->has_section_at_zero) | |
7780 | { | |
7781 | /* A global or static variable may also have been stripped | |
7782 | out by the linker if unused, in which case its address | |
7783 | will be nullified; do not add such variables into partial | |
7784 | symbol table then. */ | |
7785 | } | |
7786 | else if (pdi->is_external) | |
c906108c SS |
7787 | { |
7788 | /* Global Variable. | |
7789 | Don't enter into the minimal symbol tables as there is | |
7790 | a minimal symbol table entry from the ELF symbols already. | |
7791 | Enter into partial symbol table if it has a location | |
7792 | descriptor or a type. | |
7793 | If the location descriptor is missing, new_symbol will create | |
7794 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
7795 | be determined from the minimal symbol table whenever the variable | |
7796 | is referenced. | |
7797 | The address for the partial symbol table entry is not | |
7798 | used by GDB, but it comes in handy for debugging partial symbol | |
7799 | table building. */ | |
7800 | ||
95554aad | 7801 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 7802 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7803 | built_actual_name != NULL, |
f47fb265 MS |
7804 | VAR_DOMAIN, LOC_STATIC, |
7805 | &objfile->global_psymbols, | |
1762568f | 7806 | addr + baseaddr, |
f47fb265 | 7807 | cu->language, objfile); |
c906108c SS |
7808 | } |
7809 | else | |
7810 | { | |
ff908ebf AW |
7811 | int has_loc = pdi->d.locdesc != NULL; |
7812 | ||
7813 | /* Static Variable. Skip symbols whose value we cannot know (those | |
7814 | without location descriptors or constant values). */ | |
7815 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 7816 | { |
15d034d0 | 7817 | xfree (built_actual_name); |
decbce07 MS |
7818 | return; |
7819 | } | |
ff908ebf | 7820 | |
f47fb265 | 7821 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7822 | built_actual_name != NULL, |
f47fb265 MS |
7823 | VAR_DOMAIN, LOC_STATIC, |
7824 | &objfile->static_psymbols, | |
ff908ebf | 7825 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 7826 | cu->language, objfile); |
c906108c SS |
7827 | } |
7828 | break; | |
7829 | case DW_TAG_typedef: | |
7830 | case DW_TAG_base_type: | |
a02abb62 | 7831 | case DW_TAG_subrange_type: |
38d518c9 | 7832 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7833 | built_actual_name != NULL, |
176620f1 | 7834 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 7835 | &objfile->static_psymbols, |
1762568f | 7836 | 0, cu->language, objfile); |
c906108c | 7837 | break; |
74921315 | 7838 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
7839 | case DW_TAG_namespace: |
7840 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 7841 | built_actual_name != NULL, |
72bf9492 DJ |
7842 | VAR_DOMAIN, LOC_TYPEDEF, |
7843 | &objfile->global_psymbols, | |
1762568f | 7844 | 0, cu->language, objfile); |
72bf9492 | 7845 | break; |
530e8392 KB |
7846 | case DW_TAG_module: |
7847 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7848 | built_actual_name != NULL, | |
7849 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7850 | &objfile->global_psymbols, | |
1762568f | 7851 | 0, cu->language, objfile); |
530e8392 | 7852 | break; |
c906108c | 7853 | case DW_TAG_class_type: |
680b30c7 | 7854 | case DW_TAG_interface_type: |
c906108c SS |
7855 | case DW_TAG_structure_type: |
7856 | case DW_TAG_union_type: | |
7857 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7858 | /* Skip external references. The DWARF standard says in the section |
7859 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7860 | structure, union or class type is represented by a structure, | |
7861 | union or class entry that does not have a byte size attribute | |
7862 | and that has a DW_AT_declaration attribute." */ | |
7863 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7864 | { |
15d034d0 | 7865 | xfree (built_actual_name); |
decbce07 MS |
7866 | return; |
7867 | } | |
fa4028e9 | 7868 | |
63d06c5c DC |
7869 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7870 | static vs. global. */ | |
38d518c9 | 7871 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7872 | built_actual_name != NULL, |
176620f1 | 7873 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 7874 | cu->language == language_cplus |
63d06c5c DC |
7875 | ? &objfile->global_psymbols |
7876 | : &objfile->static_psymbols, | |
1762568f | 7877 | 0, cu->language, objfile); |
c906108c | 7878 | |
c906108c SS |
7879 | break; |
7880 | case DW_TAG_enumerator: | |
38d518c9 | 7881 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7882 | built_actual_name != NULL, |
176620f1 | 7883 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 7884 | cu->language == language_cplus |
f6fe98ef DJ |
7885 | ? &objfile->global_psymbols |
7886 | : &objfile->static_psymbols, | |
1762568f | 7887 | 0, cu->language, objfile); |
c906108c SS |
7888 | break; |
7889 | default: | |
7890 | break; | |
7891 | } | |
5c4e30ca | 7892 | |
15d034d0 | 7893 | xfree (built_actual_name); |
c906108c SS |
7894 | } |
7895 | ||
5c4e30ca DC |
7896 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7897 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7898 | the name of the enclosing namespace. */ | |
91c24f0a | 7899 | |
72bf9492 DJ |
7900 | static void |
7901 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7902 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7903 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7904 | { |
72bf9492 | 7905 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7906 | |
72bf9492 | 7907 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7908 | |
7909 | /* Now scan partial symbols in that namespace. */ | |
7910 | ||
91c24f0a | 7911 | if (pdi->has_children) |
cdc07690 | 7912 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7913 | } |
7914 | ||
5d7cb8df JK |
7915 | /* Read a partial die corresponding to a Fortran module. */ |
7916 | ||
7917 | static void | |
7918 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7919 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7920 | { |
530e8392 KB |
7921 | /* Add a symbol for the namespace. */ |
7922 | ||
7923 | add_partial_symbol (pdi, cu); | |
7924 | ||
f55ee35c | 7925 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7926 | |
7927 | if (pdi->has_children) | |
cdc07690 | 7928 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7929 | } |
7930 | ||
bc30ff58 JB |
7931 | /* Read a partial die corresponding to a subprogram and create a partial |
7932 | symbol for that subprogram. When the CU language allows it, this | |
7933 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7934 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7935 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7936 | and highest PC values found in PDI. | |
6e70227d | 7937 | |
cdc07690 YQ |
7938 | PDI may also be a lexical block, in which case we simply search |
7939 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7940 | Again, this is only performed when the CU language allows this |
7941 | type of definitions. */ | |
7942 | ||
7943 | static void | |
7944 | add_partial_subprogram (struct partial_die_info *pdi, | |
7945 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7946 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7947 | { |
7948 | if (pdi->tag == DW_TAG_subprogram) | |
7949 | { | |
7950 | if (pdi->has_pc_info) | |
7951 | { | |
7952 | if (pdi->lowpc < *lowpc) | |
7953 | *lowpc = pdi->lowpc; | |
7954 | if (pdi->highpc > *highpc) | |
7955 | *highpc = pdi->highpc; | |
cdc07690 | 7956 | if (set_addrmap) |
5734ee8b | 7957 | { |
5734ee8b | 7958 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7959 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7960 | CORE_ADDR baseaddr; | |
7961 | CORE_ADDR highpc; | |
7962 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7963 | |
7964 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7965 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7966 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7967 | pdi->lowpc + baseaddr); | |
7968 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7969 | pdi->highpc + baseaddr); | |
7970 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7971 | cu->per_cu->v.psymtab); |
5734ee8b | 7972 | } |
481860b3 GB |
7973 | } |
7974 | ||
7975 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7976 | { | |
bc30ff58 | 7977 | if (!pdi->is_declaration) |
e8d05480 JB |
7978 | /* Ignore subprogram DIEs that do not have a name, they are |
7979 | illegal. Do not emit a complaint at this point, we will | |
7980 | do so when we convert this psymtab into a symtab. */ | |
7981 | if (pdi->name) | |
7982 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7983 | } |
7984 | } | |
6e70227d | 7985 | |
bc30ff58 JB |
7986 | if (! pdi->has_children) |
7987 | return; | |
7988 | ||
7989 | if (cu->language == language_ada) | |
7990 | { | |
7991 | pdi = pdi->die_child; | |
7992 | while (pdi != NULL) | |
7993 | { | |
7994 | fixup_partial_die (pdi, cu); | |
7995 | if (pdi->tag == DW_TAG_subprogram | |
7996 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7997 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7998 | pdi = pdi->die_sibling; |
7999 | } | |
8000 | } | |
8001 | } | |
8002 | ||
91c24f0a DC |
8003 | /* Read a partial die corresponding to an enumeration type. */ |
8004 | ||
72bf9492 DJ |
8005 | static void |
8006 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8007 | struct dwarf2_cu *cu) | |
91c24f0a | 8008 | { |
72bf9492 | 8009 | struct partial_die_info *pdi; |
91c24f0a DC |
8010 | |
8011 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8012 | add_partial_symbol (enum_pdi, cu); |
8013 | ||
8014 | pdi = enum_pdi->die_child; | |
8015 | while (pdi) | |
91c24f0a | 8016 | { |
72bf9492 | 8017 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 8018 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 8019 | else |
72bf9492 DJ |
8020 | add_partial_symbol (pdi, cu); |
8021 | pdi = pdi->die_sibling; | |
91c24f0a | 8022 | } |
91c24f0a DC |
8023 | } |
8024 | ||
6caca83c CC |
8025 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8026 | ||
8027 | static unsigned int | |
d521ce57 | 8028 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8029 | { |
8030 | unsigned int bytes_read; | |
8031 | ||
8032 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8033 | } | |
8034 | ||
4bb7a0a7 DJ |
8035 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
8036 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
8037 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8038 | the initial number. */ | |
8039 | ||
8040 | static struct abbrev_info * | |
d521ce57 | 8041 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 8042 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
8043 | { |
8044 | bfd *abfd = cu->objfile->obfd; | |
8045 | unsigned int abbrev_number; | |
8046 | struct abbrev_info *abbrev; | |
8047 | ||
8048 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
8049 | ||
8050 | if (abbrev_number == 0) | |
8051 | return NULL; | |
8052 | ||
433df2d4 | 8053 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
8054 | if (!abbrev) |
8055 | { | |
422b9917 DE |
8056 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
8057 | " at offset 0x%x [in module %s]"), | |
8058 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 8059 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8060 | } |
8061 | ||
8062 | return abbrev; | |
8063 | } | |
8064 | ||
93311388 DE |
8065 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8066 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8067 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8068 | ||
d521ce57 TT |
8069 | static const gdb_byte * |
8070 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8071 | { |
dee91e82 | 8072 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
8073 | struct abbrev_info *abbrev; |
8074 | unsigned int bytes_read; | |
8075 | ||
8076 | while (1) | |
8077 | { | |
8078 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
8079 | if (abbrev == NULL) | |
8080 | return info_ptr + bytes_read; | |
8081 | else | |
dee91e82 | 8082 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8083 | } |
8084 | } | |
8085 | ||
93311388 DE |
8086 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8087 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8088 | abbrev corresponding to that skipped uleb128 should be passed in |
8089 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8090 | children. */ | |
8091 | ||
d521ce57 TT |
8092 | static const gdb_byte * |
8093 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8094 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8095 | { |
8096 | unsigned int bytes_read; | |
8097 | struct attribute attr; | |
dee91e82 DE |
8098 | bfd *abfd = reader->abfd; |
8099 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8100 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8101 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8102 | unsigned int form, i; |
8103 | ||
8104 | for (i = 0; i < abbrev->num_attrs; i++) | |
8105 | { | |
8106 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8107 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8108 | { | |
dee91e82 | 8109 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 8110 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
8111 | complaint (&symfile_complaints, |
8112 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 8113 | else |
b9502d3f | 8114 | { |
9c541725 PA |
8115 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8116 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8117 | |
8118 | if (sibling_ptr < info_ptr) | |
8119 | complaint (&symfile_complaints, | |
8120 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
8121 | else if (sibling_ptr > reader->buffer_end) |
8122 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
8123 | else |
8124 | return sibling_ptr; | |
8125 | } | |
4bb7a0a7 DJ |
8126 | } |
8127 | ||
8128 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8129 | form = abbrev->attrs[i].form; | |
8130 | skip_attribute: | |
8131 | switch (form) | |
8132 | { | |
4bb7a0a7 | 8133 | case DW_FORM_ref_addr: |
ae411497 TT |
8134 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8135 | and later it is offset sized. */ | |
8136 | if (cu->header.version == 2) | |
8137 | info_ptr += cu->header.addr_size; | |
8138 | else | |
8139 | info_ptr += cu->header.offset_size; | |
8140 | break; | |
36586728 TT |
8141 | case DW_FORM_GNU_ref_alt: |
8142 | info_ptr += cu->header.offset_size; | |
8143 | break; | |
ae411497 | 8144 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8145 | info_ptr += cu->header.addr_size; |
8146 | break; | |
8147 | case DW_FORM_data1: | |
8148 | case DW_FORM_ref1: | |
8149 | case DW_FORM_flag: | |
8150 | info_ptr += 1; | |
8151 | break; | |
2dc7f7b3 | 8152 | case DW_FORM_flag_present: |
43988095 | 8153 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8154 | break; |
4bb7a0a7 DJ |
8155 | case DW_FORM_data2: |
8156 | case DW_FORM_ref2: | |
8157 | info_ptr += 2; | |
8158 | break; | |
8159 | case DW_FORM_data4: | |
8160 | case DW_FORM_ref4: | |
8161 | info_ptr += 4; | |
8162 | break; | |
8163 | case DW_FORM_data8: | |
8164 | case DW_FORM_ref8: | |
55f1336d | 8165 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8166 | info_ptr += 8; |
8167 | break; | |
0224619f JK |
8168 | case DW_FORM_data16: |
8169 | info_ptr += 16; | |
8170 | break; | |
4bb7a0a7 | 8171 | case DW_FORM_string: |
9b1c24c8 | 8172 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8173 | info_ptr += bytes_read; |
8174 | break; | |
2dc7f7b3 | 8175 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8176 | case DW_FORM_strp: |
36586728 | 8177 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8178 | info_ptr += cu->header.offset_size; |
8179 | break; | |
2dc7f7b3 | 8180 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8181 | case DW_FORM_block: |
8182 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8183 | info_ptr += bytes_read; | |
8184 | break; | |
8185 | case DW_FORM_block1: | |
8186 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8187 | break; | |
8188 | case DW_FORM_block2: | |
8189 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8190 | break; | |
8191 | case DW_FORM_block4: | |
8192 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8193 | break; | |
8194 | case DW_FORM_sdata: | |
8195 | case DW_FORM_udata: | |
8196 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8197 | case DW_FORM_GNU_addr_index: |
8198 | case DW_FORM_GNU_str_index: | |
d521ce57 | 8199 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8200 | break; |
8201 | case DW_FORM_indirect: | |
8202 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8203 | info_ptr += bytes_read; | |
8204 | /* We need to continue parsing from here, so just go back to | |
8205 | the top. */ | |
8206 | goto skip_attribute; | |
8207 | ||
8208 | default: | |
3e43a32a MS |
8209 | error (_("Dwarf Error: Cannot handle %s " |
8210 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8211 | dwarf_form_name (form), |
8212 | bfd_get_filename (abfd)); | |
8213 | } | |
8214 | } | |
8215 | ||
8216 | if (abbrev->has_children) | |
dee91e82 | 8217 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8218 | else |
8219 | return info_ptr; | |
8220 | } | |
8221 | ||
93311388 | 8222 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8223 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8224 | |
d521ce57 | 8225 | static const gdb_byte * |
dee91e82 DE |
8226 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8227 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8228 | const gdb_byte *info_ptr) |
91c24f0a DC |
8229 | { |
8230 | /* Do we know the sibling already? */ | |
72bf9492 | 8231 | |
91c24f0a DC |
8232 | if (orig_pdi->sibling) |
8233 | return orig_pdi->sibling; | |
8234 | ||
8235 | /* Are there any children to deal with? */ | |
8236 | ||
8237 | if (!orig_pdi->has_children) | |
8238 | return info_ptr; | |
8239 | ||
4bb7a0a7 | 8240 | /* Skip the children the long way. */ |
91c24f0a | 8241 | |
dee91e82 | 8242 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8243 | } |
8244 | ||
257e7a09 | 8245 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8246 | not NULL. */ |
c906108c SS |
8247 | |
8248 | static void | |
257e7a09 YQ |
8249 | dwarf2_read_symtab (struct partial_symtab *self, |
8250 | struct objfile *objfile) | |
c906108c | 8251 | { |
257e7a09 | 8252 | if (self->readin) |
c906108c | 8253 | { |
442e4d9c | 8254 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 8255 | self->filename); |
442e4d9c YQ |
8256 | } |
8257 | else | |
8258 | { | |
8259 | if (info_verbose) | |
c906108c | 8260 | { |
442e4d9c | 8261 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 8262 | self->filename); |
442e4d9c | 8263 | gdb_flush (gdb_stdout); |
c906108c | 8264 | } |
c906108c | 8265 | |
442e4d9c | 8266 | /* Restore our global data. */ |
9a3c8263 SM |
8267 | dwarf2_per_objfile |
8268 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
8269 | dwarf2_objfile_data_key); | |
10b3939b | 8270 | |
442e4d9c YQ |
8271 | /* If this psymtab is constructed from a debug-only objfile, the |
8272 | has_section_at_zero flag will not necessarily be correct. We | |
8273 | can get the correct value for this flag by looking at the data | |
8274 | associated with the (presumably stripped) associated objfile. */ | |
8275 | if (objfile->separate_debug_objfile_backlink) | |
8276 | { | |
8277 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
8278 | = ((struct dwarf2_per_objfile *) |
8279 | objfile_data (objfile->separate_debug_objfile_backlink, | |
8280 | dwarf2_objfile_data_key)); | |
9a619af0 | 8281 | |
442e4d9c YQ |
8282 | dwarf2_per_objfile->has_section_at_zero |
8283 | = dpo_backlink->has_section_at_zero; | |
8284 | } | |
b2ab525c | 8285 | |
442e4d9c | 8286 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 8287 | |
257e7a09 | 8288 | psymtab_to_symtab_1 (self); |
c906108c | 8289 | |
442e4d9c YQ |
8290 | /* Finish up the debug error message. */ |
8291 | if (info_verbose) | |
8292 | printf_filtered (_("done.\n")); | |
c906108c | 8293 | } |
95554aad TT |
8294 | |
8295 | process_cu_includes (); | |
c906108c | 8296 | } |
9cdd5dbd DE |
8297 | \f |
8298 | /* Reading in full CUs. */ | |
c906108c | 8299 | |
10b3939b DJ |
8300 | /* Add PER_CU to the queue. */ |
8301 | ||
8302 | static void | |
95554aad TT |
8303 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8304 | enum language pretend_language) | |
10b3939b DJ |
8305 | { |
8306 | struct dwarf2_queue_item *item; | |
8307 | ||
8308 | per_cu->queued = 1; | |
8d749320 | 8309 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 8310 | item->per_cu = per_cu; |
95554aad | 8311 | item->pretend_language = pretend_language; |
10b3939b DJ |
8312 | item->next = NULL; |
8313 | ||
8314 | if (dwarf2_queue == NULL) | |
8315 | dwarf2_queue = item; | |
8316 | else | |
8317 | dwarf2_queue_tail->next = item; | |
8318 | ||
8319 | dwarf2_queue_tail = item; | |
8320 | } | |
8321 | ||
89e63ee4 DE |
8322 | /* If PER_CU is not yet queued, add it to the queue. |
8323 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8324 | dependency. | |
0907af0c | 8325 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8326 | meaning either PER_CU is already queued or it is already loaded. |
8327 | ||
8328 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8329 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8330 | |
8331 | static int | |
89e63ee4 | 8332 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8333 | struct dwarf2_per_cu_data *per_cu, |
8334 | enum language pretend_language) | |
8335 | { | |
8336 | /* We may arrive here during partial symbol reading, if we need full | |
8337 | DIEs to process an unusual case (e.g. template arguments). Do | |
8338 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
8339 | if (dwarf2_per_objfile->reading_partial_symbols) | |
8340 | { | |
8341 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8342 | return 1; | |
8343 | return 0; | |
8344 | } | |
8345 | ||
8346 | /* Mark the dependence relation so that we don't flush PER_CU | |
8347 | too early. */ | |
89e63ee4 DE |
8348 | if (dependent_cu != NULL) |
8349 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8350 | |
8351 | /* If it's already on the queue, we have nothing to do. */ | |
8352 | if (per_cu->queued) | |
8353 | return 0; | |
8354 | ||
8355 | /* If the compilation unit is already loaded, just mark it as | |
8356 | used. */ | |
8357 | if (per_cu->cu != NULL) | |
8358 | { | |
8359 | per_cu->cu->last_used = 0; | |
8360 | return 0; | |
8361 | } | |
8362 | ||
8363 | /* Add it to the queue. */ | |
8364 | queue_comp_unit (per_cu, pretend_language); | |
8365 | ||
8366 | return 1; | |
8367 | } | |
8368 | ||
10b3939b DJ |
8369 | /* Process the queue. */ |
8370 | ||
8371 | static void | |
a0f42c21 | 8372 | process_queue (void) |
10b3939b DJ |
8373 | { |
8374 | struct dwarf2_queue_item *item, *next_item; | |
8375 | ||
b4f54984 | 8376 | if (dwarf_read_debug) |
45cfd468 DE |
8377 | { |
8378 | fprintf_unfiltered (gdb_stdlog, | |
8379 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8380 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8381 | } |
8382 | ||
03dd20cc DJ |
8383 | /* The queue starts out with one item, but following a DIE reference |
8384 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
8385 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
8386 | { | |
cc12ce38 DE |
8387 | if ((dwarf2_per_objfile->using_index |
8388 | ? !item->per_cu->v.quick->compunit_symtab | |
8389 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
8390 | /* Skip dummy CUs. */ | |
8391 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
8392 | { |
8393 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 8394 | unsigned int debug_print_threshold; |
247f5c4f | 8395 | char buf[100]; |
f4dc4d17 | 8396 | |
247f5c4f | 8397 | if (per_cu->is_debug_types) |
f4dc4d17 | 8398 | { |
247f5c4f DE |
8399 | struct signatured_type *sig_type = |
8400 | (struct signatured_type *) per_cu; | |
8401 | ||
8402 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 8403 | hex_string (sig_type->signature), |
9c541725 | 8404 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
8405 | /* There can be 100s of TUs. |
8406 | Only print them in verbose mode. */ | |
8407 | debug_print_threshold = 2; | |
f4dc4d17 | 8408 | } |
247f5c4f | 8409 | else |
73be47f5 | 8410 | { |
9c541725 PA |
8411 | sprintf (buf, "CU at offset 0x%x", |
8412 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
8413 | debug_print_threshold = 1; |
8414 | } | |
247f5c4f | 8415 | |
b4f54984 | 8416 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8417 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8418 | |
8419 | if (per_cu->is_debug_types) | |
8420 | process_full_type_unit (per_cu, item->pretend_language); | |
8421 | else | |
8422 | process_full_comp_unit (per_cu, item->pretend_language); | |
8423 | ||
b4f54984 | 8424 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8425 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8426 | } |
10b3939b DJ |
8427 | |
8428 | item->per_cu->queued = 0; | |
8429 | next_item = item->next; | |
8430 | xfree (item); | |
8431 | } | |
8432 | ||
8433 | dwarf2_queue_tail = NULL; | |
45cfd468 | 8434 | |
b4f54984 | 8435 | if (dwarf_read_debug) |
45cfd468 DE |
8436 | { |
8437 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8438 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8439 | } |
10b3939b DJ |
8440 | } |
8441 | ||
8442 | /* Free all allocated queue entries. This function only releases anything if | |
8443 | an error was thrown; if the queue was processed then it would have been | |
8444 | freed as we went along. */ | |
8445 | ||
8446 | static void | |
8447 | dwarf2_release_queue (void *dummy) | |
8448 | { | |
8449 | struct dwarf2_queue_item *item, *last; | |
8450 | ||
8451 | item = dwarf2_queue; | |
8452 | while (item) | |
8453 | { | |
8454 | /* Anything still marked queued is likely to be in an | |
8455 | inconsistent state, so discard it. */ | |
8456 | if (item->per_cu->queued) | |
8457 | { | |
8458 | if (item->per_cu->cu != NULL) | |
dee91e82 | 8459 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
8460 | item->per_cu->queued = 0; |
8461 | } | |
8462 | ||
8463 | last = item; | |
8464 | item = item->next; | |
8465 | xfree (last); | |
8466 | } | |
8467 | ||
8468 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
8469 | } | |
8470 | ||
8471 | /* Read in full symbols for PST, and anything it depends on. */ | |
8472 | ||
c906108c | 8473 | static void |
fba45db2 | 8474 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 8475 | { |
10b3939b | 8476 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
8477 | int i; |
8478 | ||
95554aad TT |
8479 | if (pst->readin) |
8480 | return; | |
8481 | ||
aaa75496 | 8482 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
8483 | if (!pst->dependencies[i]->readin |
8484 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
8485 | { |
8486 | /* Inform about additional files that need to be read in. */ | |
8487 | if (info_verbose) | |
8488 | { | |
a3f17187 | 8489 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
8490 | fputs_filtered (" ", gdb_stdout); |
8491 | wrap_here (""); | |
8492 | fputs_filtered ("and ", gdb_stdout); | |
8493 | wrap_here (""); | |
8494 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 8495 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
8496 | gdb_flush (gdb_stdout); |
8497 | } | |
8498 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
8499 | } | |
8500 | ||
9a3c8263 | 8501 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
8502 | |
8503 | if (per_cu == NULL) | |
aaa75496 JB |
8504 | { |
8505 | /* It's an include file, no symbols to read for it. | |
8506 | Everything is in the parent symtab. */ | |
8507 | pst->readin = 1; | |
8508 | return; | |
8509 | } | |
c906108c | 8510 | |
a0f42c21 | 8511 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
8512 | } |
8513 | ||
dee91e82 DE |
8514 | /* Trivial hash function for die_info: the hash value of a DIE |
8515 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8516 | |
dee91e82 DE |
8517 | static hashval_t |
8518 | die_hash (const void *item) | |
10b3939b | 8519 | { |
9a3c8263 | 8520 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8521 | |
9c541725 | 8522 | return to_underlying (die->sect_off); |
dee91e82 | 8523 | } |
63d06c5c | 8524 | |
dee91e82 DE |
8525 | /* Trivial comparison function for die_info structures: two DIEs |
8526 | are equal if they have the same offset. */ | |
98bfdba5 | 8527 | |
dee91e82 DE |
8528 | static int |
8529 | die_eq (const void *item_lhs, const void *item_rhs) | |
8530 | { | |
9a3c8263 SM |
8531 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8532 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8533 | |
9c541725 | 8534 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8535 | } |
c906108c | 8536 | |
dee91e82 DE |
8537 | /* die_reader_func for load_full_comp_unit. |
8538 | This is identical to read_signatured_type_reader, | |
8539 | but is kept separate for now. */ | |
c906108c | 8540 | |
dee91e82 DE |
8541 | static void |
8542 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8543 | const gdb_byte *info_ptr, |
dee91e82 DE |
8544 | struct die_info *comp_unit_die, |
8545 | int has_children, | |
8546 | void *data) | |
8547 | { | |
8548 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 8549 | enum language *language_ptr = (enum language *) data; |
6caca83c | 8550 | |
dee91e82 DE |
8551 | gdb_assert (cu->die_hash == NULL); |
8552 | cu->die_hash = | |
8553 | htab_create_alloc_ex (cu->header.length / 12, | |
8554 | die_hash, | |
8555 | die_eq, | |
8556 | NULL, | |
8557 | &cu->comp_unit_obstack, | |
8558 | hashtab_obstack_allocate, | |
8559 | dummy_obstack_deallocate); | |
e142c38c | 8560 | |
dee91e82 DE |
8561 | if (has_children) |
8562 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
8563 | &info_ptr, comp_unit_die); | |
8564 | cu->dies = comp_unit_die; | |
8565 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
8566 | |
8567 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8568 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8569 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8570 | or we won't be able to build types correctly. |
8571 | Similarly, if we do not read the producer, we can not apply | |
8572 | producer-specific interpretation. */ | |
95554aad | 8573 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 8574 | } |
10b3939b | 8575 | |
dee91e82 | 8576 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 8577 | |
dee91e82 | 8578 | static void |
95554aad TT |
8579 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8580 | enum language pretend_language) | |
dee91e82 | 8581 | { |
3019eac3 | 8582 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 8583 | |
f4dc4d17 DE |
8584 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8585 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
8586 | } |
8587 | ||
3da10d80 KS |
8588 | /* Add a DIE to the delayed physname list. */ |
8589 | ||
8590 | static void | |
8591 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8592 | const char *name, struct die_info *die, | |
8593 | struct dwarf2_cu *cu) | |
8594 | { | |
8595 | struct delayed_method_info mi; | |
8596 | mi.type = type; | |
8597 | mi.fnfield_index = fnfield_index; | |
8598 | mi.index = index; | |
8599 | mi.name = name; | |
8600 | mi.die = die; | |
8601 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8602 | } | |
8603 | ||
8604 | /* A cleanup for freeing the delayed method list. */ | |
8605 | ||
8606 | static void | |
8607 | free_delayed_list (void *ptr) | |
8608 | { | |
8609 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8610 | if (cu->method_list != NULL) | |
8611 | { | |
8612 | VEC_free (delayed_method_info, cu->method_list); | |
8613 | cu->method_list = NULL; | |
8614 | } | |
8615 | } | |
8616 | ||
3693fdb3 PA |
8617 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8618 | "const" / "volatile". If so, decrements LEN by the length of the | |
8619 | modifier and return true. Otherwise return false. */ | |
8620 | ||
8621 | template<size_t N> | |
8622 | static bool | |
8623 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8624 | { | |
8625 | size_t mod_len = sizeof (mod) - 1; | |
8626 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8627 | { | |
8628 | len -= mod_len; | |
8629 | return true; | |
8630 | } | |
8631 | return false; | |
8632 | } | |
8633 | ||
3da10d80 KS |
8634 | /* Compute the physnames of any methods on the CU's method list. |
8635 | ||
8636 | The computation of method physnames is delayed in order to avoid the | |
8637 | (bad) condition that one of the method's formal parameters is of an as yet | |
8638 | incomplete type. */ | |
8639 | ||
8640 | static void | |
8641 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8642 | { | |
8643 | int i; | |
8644 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8645 | |
8646 | /* Only C++ delays computing physnames. */ | |
8647 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8648 | return; | |
8649 | gdb_assert (cu->language == language_cplus); | |
8650 | ||
3da10d80 KS |
8651 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8652 | { | |
1d06ead6 | 8653 | const char *physname; |
3da10d80 KS |
8654 | struct fn_fieldlist *fn_flp |
8655 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8656 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8657 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8658 | = physname ? physname : ""; | |
3693fdb3 PA |
8659 | |
8660 | /* Since there's no tag to indicate whether a method is a | |
8661 | const/volatile overload, extract that information out of the | |
8662 | demangled name. */ | |
8663 | if (physname != NULL) | |
8664 | { | |
8665 | size_t len = strlen (physname); | |
8666 | ||
8667 | while (1) | |
8668 | { | |
8669 | if (physname[len] == ')') /* shortcut */ | |
8670 | break; | |
8671 | else if (check_modifier (physname, len, " const")) | |
8672 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8673 | else if (check_modifier (physname, len, " volatile")) | |
8674 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8675 | else | |
8676 | break; | |
8677 | } | |
8678 | } | |
3da10d80 KS |
8679 | } |
8680 | } | |
8681 | ||
a766d390 DE |
8682 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8683 | and it's not clear if/how imported objects will appear. | |
8684 | To keep Go support simple until that's worked out, | |
8685 | go back through what we've read and create something usable. | |
8686 | We could do this while processing each DIE, and feels kinda cleaner, | |
8687 | but that way is more invasive. | |
8688 | This is to, for example, allow the user to type "p var" or "b main" | |
8689 | without having to specify the package name, and allow lookups | |
8690 | of module.object to work in contexts that use the expression | |
8691 | parser. */ | |
8692 | ||
8693 | static void | |
8694 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8695 | { | |
8696 | char *package_name = NULL; | |
8697 | struct pending *list; | |
8698 | int i; | |
8699 | ||
8700 | for (list = global_symbols; list != NULL; list = list->next) | |
8701 | { | |
8702 | for (i = 0; i < list->nsyms; ++i) | |
8703 | { | |
8704 | struct symbol *sym = list->symbol[i]; | |
8705 | ||
8706 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8707 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8708 | { | |
8709 | char *this_package_name = go_symbol_package_name (sym); | |
8710 | ||
8711 | if (this_package_name == NULL) | |
8712 | continue; | |
8713 | if (package_name == NULL) | |
8714 | package_name = this_package_name; | |
8715 | else | |
8716 | { | |
8717 | if (strcmp (package_name, this_package_name) != 0) | |
8718 | complaint (&symfile_complaints, | |
8719 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8720 | (symbol_symtab (sym) != NULL |
8721 | ? symtab_to_filename_for_display | |
8722 | (symbol_symtab (sym)) | |
4262abfb | 8723 | : objfile_name (cu->objfile)), |
a766d390 DE |
8724 | this_package_name, package_name); |
8725 | xfree (this_package_name); | |
8726 | } | |
8727 | } | |
8728 | } | |
8729 | } | |
8730 | ||
8731 | if (package_name != NULL) | |
8732 | { | |
8733 | struct objfile *objfile = cu->objfile; | |
34a68019 | 8734 | const char *saved_package_name |
224c3ddb SM |
8735 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
8736 | package_name, | |
8737 | strlen (package_name)); | |
19f392bc UW |
8738 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8739 | saved_package_name); | |
a766d390 DE |
8740 | struct symbol *sym; |
8741 | ||
8742 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
8743 | ||
e623cf5d | 8744 | sym = allocate_symbol (objfile); |
f85f34ed | 8745 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
8746 | SYMBOL_SET_NAMES (sym, saved_package_name, |
8747 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
8748 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8749 | e.g., "main" finds the "main" module and not C's main(). */ | |
8750 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8751 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8752 | SYMBOL_TYPE (sym) = type; |
8753 | ||
8754 | add_symbol_to_list (sym, &global_symbols); | |
8755 | ||
8756 | xfree (package_name); | |
8757 | } | |
8758 | } | |
8759 | ||
95554aad TT |
8760 | /* Return the symtab for PER_CU. This works properly regardless of |
8761 | whether we're using the index or psymtabs. */ | |
8762 | ||
43f3e411 DE |
8763 | static struct compunit_symtab * |
8764 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
8765 | { |
8766 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
8767 | ? per_cu->v.quick->compunit_symtab |
8768 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
8769 | } |
8770 | ||
8771 | /* A helper function for computing the list of all symbol tables | |
8772 | included by PER_CU. */ | |
8773 | ||
8774 | static void | |
43f3e411 | 8775 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 8776 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 8777 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 8778 | struct compunit_symtab *immediate_parent) |
95554aad TT |
8779 | { |
8780 | void **slot; | |
8781 | int ix; | |
43f3e411 | 8782 | struct compunit_symtab *cust; |
95554aad TT |
8783 | struct dwarf2_per_cu_data *iter; |
8784 | ||
8785 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
8786 | if (*slot != NULL) | |
8787 | { | |
8788 | /* This inclusion and its children have been processed. */ | |
8789 | return; | |
8790 | } | |
8791 | ||
8792 | *slot = per_cu; | |
8793 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
8794 | cust = get_compunit_symtab (per_cu); |
8795 | if (cust != NULL) | |
ec94af83 DE |
8796 | { |
8797 | /* If this is a type unit only add its symbol table if we haven't | |
8798 | seen it yet (type unit per_cu's can share symtabs). */ | |
8799 | if (per_cu->is_debug_types) | |
8800 | { | |
43f3e411 | 8801 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
8802 | if (*slot == NULL) |
8803 | { | |
43f3e411 DE |
8804 | *slot = cust; |
8805 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
8806 | if (cust->user == NULL) | |
8807 | cust->user = immediate_parent; | |
ec94af83 DE |
8808 | } |
8809 | } | |
8810 | else | |
f9125b6c | 8811 | { |
43f3e411 DE |
8812 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
8813 | if (cust->user == NULL) | |
8814 | cust->user = immediate_parent; | |
f9125b6c | 8815 | } |
ec94af83 | 8816 | } |
95554aad TT |
8817 | |
8818 | for (ix = 0; | |
796a7ff8 | 8819 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 8820 | ++ix) |
ec94af83 DE |
8821 | { |
8822 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 8823 | all_type_symtabs, iter, cust); |
ec94af83 | 8824 | } |
95554aad TT |
8825 | } |
8826 | ||
43f3e411 | 8827 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
8828 | PER_CU. */ |
8829 | ||
8830 | static void | |
43f3e411 | 8831 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 8832 | { |
f4dc4d17 DE |
8833 | gdb_assert (! per_cu->is_debug_types); |
8834 | ||
796a7ff8 | 8835 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
8836 | { |
8837 | int ix, len; | |
ec94af83 | 8838 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
8839 | struct compunit_symtab *compunit_symtab_iter; |
8840 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 8841 | htab_t all_children, all_type_symtabs; |
43f3e411 | 8842 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
8843 | |
8844 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 8845 | if (cust == NULL) |
95554aad TT |
8846 | return; |
8847 | ||
8848 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
8849 | NULL, xcalloc, xfree); | |
ec94af83 DE |
8850 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
8851 | NULL, xcalloc, xfree); | |
95554aad TT |
8852 | |
8853 | for (ix = 0; | |
796a7ff8 | 8854 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 8855 | ix, per_cu_iter); |
95554aad | 8856 | ++ix) |
ec94af83 DE |
8857 | { |
8858 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 8859 | all_type_symtabs, per_cu_iter, |
43f3e411 | 8860 | cust); |
ec94af83 | 8861 | } |
95554aad | 8862 | |
ec94af83 | 8863 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
8864 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
8865 | cust->includes | |
8d749320 SM |
8866 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
8867 | struct compunit_symtab *, len + 1); | |
95554aad | 8868 | for (ix = 0; |
43f3e411 DE |
8869 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
8870 | compunit_symtab_iter); | |
95554aad | 8871 | ++ix) |
43f3e411 DE |
8872 | cust->includes[ix] = compunit_symtab_iter; |
8873 | cust->includes[len] = NULL; | |
95554aad | 8874 | |
43f3e411 | 8875 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 8876 | htab_delete (all_children); |
ec94af83 | 8877 | htab_delete (all_type_symtabs); |
95554aad TT |
8878 | } |
8879 | } | |
8880 | ||
8881 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
8882 | read. */ | |
8883 | ||
8884 | static void | |
8885 | process_cu_includes (void) | |
8886 | { | |
8887 | int ix; | |
8888 | struct dwarf2_per_cu_data *iter; | |
8889 | ||
8890 | for (ix = 0; | |
8891 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8892 | ix, iter); | |
8893 | ++ix) | |
f4dc4d17 DE |
8894 | { |
8895 | if (! iter->is_debug_types) | |
43f3e411 | 8896 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8897 | } |
95554aad TT |
8898 | |
8899 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8900 | } | |
8901 | ||
9cdd5dbd | 8902 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8903 | already been loaded into memory. */ |
8904 | ||
8905 | static void | |
95554aad TT |
8906 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8907 | enum language pretend_language) | |
10b3939b | 8908 | { |
10b3939b | 8909 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8910 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8911 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8912 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8913 | struct compunit_symtab *cust; |
33c7c59d | 8914 | struct cleanup *delayed_list_cleanup; |
10b3939b | 8915 | CORE_ADDR baseaddr; |
4359dff1 | 8916 | struct block *static_block; |
3e29f34a | 8917 | CORE_ADDR addr; |
10b3939b DJ |
8918 | |
8919 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8920 | ||
10b3939b | 8921 | buildsym_init (); |
33c7c59d | 8922 | scoped_free_pendings free_pending; |
3da10d80 | 8923 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8924 | |
8925 | cu->list_in_scope = &file_symbols; | |
c906108c | 8926 | |
95554aad TT |
8927 | cu->language = pretend_language; |
8928 | cu->language_defn = language_def (cu->language); | |
8929 | ||
c906108c | 8930 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8931 | process_die (cu->dies, cu); |
c906108c | 8932 | |
a766d390 DE |
8933 | /* For now fudge the Go package. */ |
8934 | if (cu->language == language_go) | |
8935 | fixup_go_packaging (cu); | |
8936 | ||
3da10d80 KS |
8937 | /* Now that we have processed all the DIEs in the CU, all the types |
8938 | should be complete, and it should now be safe to compute all of the | |
8939 | physnames. */ | |
8940 | compute_delayed_physnames (cu); | |
8941 | do_cleanups (delayed_list_cleanup); | |
8942 | ||
fae299cd DC |
8943 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8944 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8945 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8946 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8947 | |
3e29f34a MR |
8948 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8949 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8950 | |
8951 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8952 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8953 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8954 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8955 | this comp unit. */ | |
8956 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8957 | ||
43f3e411 DE |
8958 | cust = end_symtab_from_static_block (static_block, |
8959 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8960 | |
43f3e411 | 8961 | if (cust != NULL) |
c906108c | 8962 | { |
df15bd07 | 8963 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8964 | |
8be455d7 JK |
8965 | /* Set symtab language to language from DW_AT_language. If the |
8966 | compilation is from a C file generated by language preprocessors, do | |
8967 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8968 | if (!(cu->language == language_c |
40e3ad0e | 8969 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8970 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8971 | |
8972 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8973 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8974 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8975 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8976 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8977 | |
8978 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8979 | needed, it would be wrong due to missing DW_AT_producer there. | |
8980 | ||
8981 | Still one can confuse GDB by using non-standard GCC compilation | |
8982 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8983 | */ | |
ab260dad | 8984 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8985 | cust->locations_valid = 1; |
e0d00bc7 JK |
8986 | |
8987 | if (gcc_4_minor >= 5) | |
43f3e411 | 8988 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8989 | |
43f3e411 | 8990 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8991 | } |
9291a0cd TT |
8992 | |
8993 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8994 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8995 | else |
8996 | { | |
8997 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8998 | pst->compunit_symtab = cust; |
9291a0cd TT |
8999 | pst->readin = 1; |
9000 | } | |
c906108c | 9001 | |
95554aad TT |
9002 | /* Push it for inclusion processing later. */ |
9003 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
f4dc4d17 | 9004 | } |
45cfd468 | 9005 | |
f4dc4d17 DE |
9006 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9007 | already been loaded into memory. */ | |
9008 | ||
9009 | static void | |
9010 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9011 | enum language pretend_language) | |
9012 | { | |
9013 | struct dwarf2_cu *cu = per_cu->cu; | |
9014 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 9015 | struct compunit_symtab *cust; |
33c7c59d | 9016 | struct cleanup *delayed_list_cleanup; |
0186c6a7 DE |
9017 | struct signatured_type *sig_type; |
9018 | ||
9019 | gdb_assert (per_cu->is_debug_types); | |
9020 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
9021 | |
9022 | buildsym_init (); | |
33c7c59d | 9023 | scoped_free_pendings free_pending; |
f4dc4d17 DE |
9024 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
9025 | ||
9026 | cu->list_in_scope = &file_symbols; | |
9027 | ||
9028 | cu->language = pretend_language; | |
9029 | cu->language_defn = language_def (cu->language); | |
9030 | ||
9031 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9032 | process_die (cu->dies, cu); | |
9033 | ||
9034 | /* For now fudge the Go package. */ | |
9035 | if (cu->language == language_go) | |
9036 | fixup_go_packaging (cu); | |
9037 | ||
9038 | /* Now that we have processed all the DIEs in the CU, all the types | |
9039 | should be complete, and it should now be safe to compute all of the | |
9040 | physnames. */ | |
9041 | compute_delayed_physnames (cu); | |
9042 | do_cleanups (delayed_list_cleanup); | |
9043 | ||
9044 | /* TUs share symbol tables. | |
9045 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9046 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9047 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9048 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9049 | { |
43f3e411 DE |
9050 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
9051 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 9052 | |
43f3e411 | 9053 | if (cust != NULL) |
f4dc4d17 DE |
9054 | { |
9055 | /* Set symtab language to language from DW_AT_language. If the | |
9056 | compilation is from a C file generated by language preprocessors, | |
9057 | do not set the language if it was already deduced by | |
9058 | start_subfile. */ | |
43f3e411 DE |
9059 | if (!(cu->language == language_c |
9060 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9061 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9062 | } |
9063 | } | |
9064 | else | |
9065 | { | |
0ab9ce85 | 9066 | augment_type_symtab (); |
43f3e411 | 9067 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9068 | } |
9069 | ||
9070 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9071 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9072 | else |
9073 | { | |
9074 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9075 | pst->compunit_symtab = cust; |
f4dc4d17 | 9076 | pst->readin = 1; |
45cfd468 | 9077 | } |
c906108c SS |
9078 | } |
9079 | ||
95554aad TT |
9080 | /* Process an imported unit DIE. */ |
9081 | ||
9082 | static void | |
9083 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9084 | { | |
9085 | struct attribute *attr; | |
9086 | ||
f4dc4d17 DE |
9087 | /* For now we don't handle imported units in type units. */ |
9088 | if (cu->per_cu->is_debug_types) | |
9089 | { | |
9090 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9091 | " supported in type units [in module %s]"), | |
4262abfb | 9092 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
9093 | } |
9094 | ||
95554aad TT |
9095 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9096 | if (attr != NULL) | |
9097 | { | |
9c541725 PA |
9098 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9099 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9100 | dwarf2_per_cu_data *per_cu | |
9101 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 9102 | |
69d751e3 | 9103 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
9104 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
9105 | load_full_comp_unit (per_cu, cu->language); | |
9106 | ||
796a7ff8 | 9107 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
9108 | per_cu); |
9109 | } | |
9110 | } | |
9111 | ||
4c8aa72d PA |
9112 | /* RAII object that represents a process_die scope: i.e., |
9113 | starts/finishes processing a DIE. */ | |
9114 | class process_die_scope | |
adde2bff | 9115 | { |
4c8aa72d PA |
9116 | public: |
9117 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9118 | : m_die (die), m_cu (cu) | |
9119 | { | |
9120 | /* We should only be processing DIEs not already in process. */ | |
9121 | gdb_assert (!m_die->in_process); | |
9122 | m_die->in_process = true; | |
9123 | } | |
8c3cb9fa | 9124 | |
4c8aa72d PA |
9125 | ~process_die_scope () |
9126 | { | |
9127 | m_die->in_process = false; | |
9128 | ||
9129 | /* If we're done processing the DIE for the CU that owns the line | |
9130 | header, we don't need the line header anymore. */ | |
9131 | if (m_cu->line_header_die_owner == m_die) | |
9132 | { | |
9133 | delete m_cu->line_header; | |
9134 | m_cu->line_header = NULL; | |
9135 | m_cu->line_header_die_owner = NULL; | |
9136 | } | |
9137 | } | |
9138 | ||
9139 | private: | |
9140 | die_info *m_die; | |
9141 | dwarf2_cu *m_cu; | |
9142 | }; | |
adde2bff | 9143 | |
c906108c SS |
9144 | /* Process a die and its children. */ |
9145 | ||
9146 | static void | |
e7c27a73 | 9147 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9148 | { |
4c8aa72d | 9149 | process_die_scope scope (die, cu); |
adde2bff | 9150 | |
c906108c SS |
9151 | switch (die->tag) |
9152 | { | |
9153 | case DW_TAG_padding: | |
9154 | break; | |
9155 | case DW_TAG_compile_unit: | |
95554aad | 9156 | case DW_TAG_partial_unit: |
e7c27a73 | 9157 | read_file_scope (die, cu); |
c906108c | 9158 | break; |
348e048f DE |
9159 | case DW_TAG_type_unit: |
9160 | read_type_unit_scope (die, cu); | |
9161 | break; | |
c906108c | 9162 | case DW_TAG_subprogram: |
c906108c | 9163 | case DW_TAG_inlined_subroutine: |
edb3359d | 9164 | read_func_scope (die, cu); |
c906108c SS |
9165 | break; |
9166 | case DW_TAG_lexical_block: | |
14898363 L |
9167 | case DW_TAG_try_block: |
9168 | case DW_TAG_catch_block: | |
e7c27a73 | 9169 | read_lexical_block_scope (die, cu); |
c906108c | 9170 | break; |
216f72a1 | 9171 | case DW_TAG_call_site: |
96408a79 SA |
9172 | case DW_TAG_GNU_call_site: |
9173 | read_call_site_scope (die, cu); | |
9174 | break; | |
c906108c | 9175 | case DW_TAG_class_type: |
680b30c7 | 9176 | case DW_TAG_interface_type: |
c906108c SS |
9177 | case DW_TAG_structure_type: |
9178 | case DW_TAG_union_type: | |
134d01f1 | 9179 | process_structure_scope (die, cu); |
c906108c SS |
9180 | break; |
9181 | case DW_TAG_enumeration_type: | |
134d01f1 | 9182 | process_enumeration_scope (die, cu); |
c906108c | 9183 | break; |
134d01f1 | 9184 | |
f792889a DJ |
9185 | /* These dies have a type, but processing them does not create |
9186 | a symbol or recurse to process the children. Therefore we can | |
9187 | read them on-demand through read_type_die. */ | |
c906108c | 9188 | case DW_TAG_subroutine_type: |
72019c9c | 9189 | case DW_TAG_set_type: |
c906108c | 9190 | case DW_TAG_array_type: |
c906108c | 9191 | case DW_TAG_pointer_type: |
c906108c | 9192 | case DW_TAG_ptr_to_member_type: |
c906108c | 9193 | case DW_TAG_reference_type: |
4297a3f0 | 9194 | case DW_TAG_rvalue_reference_type: |
c906108c | 9195 | case DW_TAG_string_type: |
c906108c | 9196 | break; |
134d01f1 | 9197 | |
c906108c | 9198 | case DW_TAG_base_type: |
a02abb62 | 9199 | case DW_TAG_subrange_type: |
cb249c71 | 9200 | case DW_TAG_typedef: |
134d01f1 DJ |
9201 | /* Add a typedef symbol for the type definition, if it has a |
9202 | DW_AT_name. */ | |
f792889a | 9203 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9204 | break; |
c906108c | 9205 | case DW_TAG_common_block: |
e7c27a73 | 9206 | read_common_block (die, cu); |
c906108c SS |
9207 | break; |
9208 | case DW_TAG_common_inclusion: | |
9209 | break; | |
d9fa45fe | 9210 | case DW_TAG_namespace: |
4d4ec4e5 | 9211 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 9212 | read_namespace (die, cu); |
d9fa45fe | 9213 | break; |
5d7cb8df | 9214 | case DW_TAG_module: |
4d4ec4e5 | 9215 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
9216 | read_module (die, cu); |
9217 | break; | |
d9fa45fe | 9218 | case DW_TAG_imported_declaration: |
74921315 KS |
9219 | cu->processing_has_namespace_info = 1; |
9220 | if (read_namespace_alias (die, cu)) | |
9221 | break; | |
9222 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 9223 | case DW_TAG_imported_module: |
4d4ec4e5 | 9224 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
9225 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9226 | || cu->language != language_fortran)) | |
9227 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
9228 | dwarf_tag_name (die->tag)); | |
9229 | read_import_statement (die, cu); | |
d9fa45fe | 9230 | break; |
95554aad TT |
9231 | |
9232 | case DW_TAG_imported_unit: | |
9233 | process_imported_unit_die (die, cu); | |
9234 | break; | |
9235 | ||
c906108c | 9236 | default: |
e7c27a73 | 9237 | new_symbol (die, NULL, cu); |
c906108c SS |
9238 | break; |
9239 | } | |
9240 | } | |
ca69b9e6 DE |
9241 | \f |
9242 | /* DWARF name computation. */ | |
c906108c | 9243 | |
94af9270 KS |
9244 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9245 | needs to have the name of the scope prepended to the name listed in the | |
9246 | die. */ | |
9247 | ||
9248 | static int | |
9249 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9250 | { | |
1c809c68 TT |
9251 | struct attribute *attr; |
9252 | ||
94af9270 KS |
9253 | switch (die->tag) |
9254 | { | |
9255 | case DW_TAG_namespace: | |
9256 | case DW_TAG_typedef: | |
9257 | case DW_TAG_class_type: | |
9258 | case DW_TAG_interface_type: | |
9259 | case DW_TAG_structure_type: | |
9260 | case DW_TAG_union_type: | |
9261 | case DW_TAG_enumeration_type: | |
9262 | case DW_TAG_enumerator: | |
9263 | case DW_TAG_subprogram: | |
08a76f8a | 9264 | case DW_TAG_inlined_subroutine: |
94af9270 | 9265 | case DW_TAG_member: |
74921315 | 9266 | case DW_TAG_imported_declaration: |
94af9270 KS |
9267 | return 1; |
9268 | ||
9269 | case DW_TAG_variable: | |
c2b0a229 | 9270 | case DW_TAG_constant: |
94af9270 KS |
9271 | /* We only need to prefix "globally" visible variables. These include |
9272 | any variable marked with DW_AT_external or any variable that | |
9273 | lives in a namespace. [Variables in anonymous namespaces | |
9274 | require prefixing, but they are not DW_AT_external.] */ | |
9275 | ||
9276 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9277 | { | |
9278 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9279 | |
94af9270 KS |
9280 | return die_needs_namespace (die_specification (die, &spec_cu), |
9281 | spec_cu); | |
9282 | } | |
9283 | ||
1c809c68 | 9284 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9285 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9286 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9287 | return 0; |
9288 | /* A variable in a lexical block of some kind does not need a | |
9289 | namespace, even though in C++ such variables may be external | |
9290 | and have a mangled name. */ | |
9291 | if (die->parent->tag == DW_TAG_lexical_block | |
9292 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9293 | || die->parent->tag == DW_TAG_catch_block |
9294 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9295 | return 0; |
9296 | return 1; | |
94af9270 KS |
9297 | |
9298 | default: | |
9299 | return 0; | |
9300 | } | |
9301 | } | |
9302 | ||
73b9be8b KS |
9303 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9304 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9305 | defined for the given DIE. */ | |
9306 | ||
9307 | static struct attribute * | |
9308 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9309 | { | |
9310 | struct attribute *attr; | |
9311 | ||
9312 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9313 | if (attr == NULL) | |
9314 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9315 | ||
9316 | return attr; | |
9317 | } | |
9318 | ||
9319 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9320 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9321 | defined for the given DIE. */ | |
9322 | ||
9323 | static const char * | |
9324 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9325 | { | |
9326 | const char *linkage_name; | |
9327 | ||
9328 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9329 | if (linkage_name == NULL) | |
9330 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9331 | ||
9332 | return linkage_name; | |
9333 | } | |
9334 | ||
94af9270 | 9335 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9336 | compute the physname for the object, which include a method's: |
9c37b5ae | 9337 | - formal parameters (C++), |
a766d390 | 9338 | - receiver type (Go), |
a766d390 DE |
9339 | |
9340 | The term "physname" is a bit confusing. | |
9341 | For C++, for example, it is the demangled name. | |
9342 | For Go, for example, it's the mangled name. | |
94af9270 | 9343 | |
af6b7be1 JB |
9344 | For Ada, return the DIE's linkage name rather than the fully qualified |
9345 | name. PHYSNAME is ignored.. | |
9346 | ||
94af9270 KS |
9347 | The result is allocated on the objfile_obstack and canonicalized. */ |
9348 | ||
9349 | static const char * | |
15d034d0 TT |
9350 | dwarf2_compute_name (const char *name, |
9351 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9352 | int physname) |
9353 | { | |
bb5ed363 DE |
9354 | struct objfile *objfile = cu->objfile; |
9355 | ||
94af9270 KS |
9356 | if (name == NULL) |
9357 | name = dwarf2_name (die, cu); | |
9358 | ||
2ee7123e DE |
9359 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
9360 | but otherwise compute it by typename_concat inside GDB. | |
9361 | FIXME: Actually this is not really true, or at least not always true. | |
9362 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
9363 | Fortran names because there is no mangling standard. So new_symbol_full | |
9364 | will set the demangled name to the result of dwarf2_full_name, and it is | |
9365 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
9366 | if (cu->language == language_ada |
9367 | || (cu->language == language_fortran && physname)) | |
9368 | { | |
9369 | /* For Ada unit, we prefer the linkage name over the name, as | |
9370 | the former contains the exported name, which the user expects | |
9371 | to be able to reference. Ideally, we want the user to be able | |
9372 | to reference this entity using either natural or linkage name, | |
9373 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 9374 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 9375 | |
2ee7123e DE |
9376 | if (linkage_name != NULL) |
9377 | return linkage_name; | |
f55ee35c JK |
9378 | } |
9379 | ||
94af9270 KS |
9380 | /* These are the only languages we know how to qualify names in. */ |
9381 | if (name != NULL | |
9c37b5ae | 9382 | && (cu->language == language_cplus |
c44af4eb TT |
9383 | || cu->language == language_fortran || cu->language == language_d |
9384 | || cu->language == language_rust)) | |
94af9270 KS |
9385 | { |
9386 | if (die_needs_namespace (die, cu)) | |
9387 | { | |
9388 | long length; | |
0d5cff50 | 9389 | const char *prefix; |
34a68019 | 9390 | const char *canonical_name = NULL; |
94af9270 | 9391 | |
d7e74731 PA |
9392 | string_file buf; |
9393 | ||
94af9270 | 9394 | prefix = determine_prefix (die, cu); |
94af9270 KS |
9395 | if (*prefix != '\0') |
9396 | { | |
f55ee35c JK |
9397 | char *prefixed_name = typename_concat (NULL, prefix, name, |
9398 | physname, cu); | |
9a619af0 | 9399 | |
d7e74731 | 9400 | buf.puts (prefixed_name); |
94af9270 KS |
9401 | xfree (prefixed_name); |
9402 | } | |
9403 | else | |
d7e74731 | 9404 | buf.puts (name); |
94af9270 | 9405 | |
98bfdba5 PA |
9406 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
9407 | as children with DW_TAG_template_type_param or | |
9408 | DW_TAG_value_type_param. If the latter, add them to the name | |
9409 | here. If the name already has template parameters, then | |
9410 | skip this step; some versions of GCC emit both, and | |
9411 | it is more efficient to use the pre-computed name. | |
9412 | ||
9413 | Something to keep in mind about this process: it is very | |
9414 | unlikely, or in some cases downright impossible, to produce | |
9415 | something that will match the mangled name of a function. | |
9416 | If the definition of the function has the same debug info, | |
9417 | we should be able to match up with it anyway. But fallbacks | |
9418 | using the minimal symbol, for instance to find a method | |
9419 | implemented in a stripped copy of libstdc++, will not work. | |
9420 | If we do not have debug info for the definition, we will have to | |
9421 | match them up some other way. | |
9422 | ||
9423 | When we do name matching there is a related problem with function | |
9424 | templates; two instantiated function templates are allowed to | |
9425 | differ only by their return types, which we do not add here. */ | |
9426 | ||
9427 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
9428 | { | |
9429 | struct attribute *attr; | |
9430 | struct die_info *child; | |
9431 | int first = 1; | |
9432 | ||
9433 | die->building_fullname = 1; | |
9434 | ||
9435 | for (child = die->child; child != NULL; child = child->sibling) | |
9436 | { | |
9437 | struct type *type; | |
12df843f | 9438 | LONGEST value; |
d521ce57 | 9439 | const gdb_byte *bytes; |
98bfdba5 PA |
9440 | struct dwarf2_locexpr_baton *baton; |
9441 | struct value *v; | |
9442 | ||
9443 | if (child->tag != DW_TAG_template_type_param | |
9444 | && child->tag != DW_TAG_template_value_param) | |
9445 | continue; | |
9446 | ||
9447 | if (first) | |
9448 | { | |
d7e74731 | 9449 | buf.puts ("<"); |
98bfdba5 PA |
9450 | first = 0; |
9451 | } | |
9452 | else | |
d7e74731 | 9453 | buf.puts (", "); |
98bfdba5 PA |
9454 | |
9455 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
9456 | if (attr == NULL) | |
9457 | { | |
9458 | complaint (&symfile_complaints, | |
9459 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 9460 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
9461 | continue; |
9462 | } | |
9463 | type = die_type (child, cu); | |
9464 | ||
9465 | if (child->tag == DW_TAG_template_type_param) | |
9466 | { | |
d7e74731 | 9467 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
9468 | continue; |
9469 | } | |
9470 | ||
9471 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
9472 | if (attr == NULL) | |
9473 | { | |
9474 | complaint (&symfile_complaints, | |
3e43a32a MS |
9475 | _("template parameter missing " |
9476 | "DW_AT_const_value")); | |
d7e74731 | 9477 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
9478 | continue; |
9479 | } | |
9480 | ||
9481 | dwarf2_const_value_attr (attr, type, name, | |
9482 | &cu->comp_unit_obstack, cu, | |
9483 | &value, &bytes, &baton); | |
9484 | ||
9485 | if (TYPE_NOSIGN (type)) | |
9486 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
9487 | changed, this can use value_print instead. */ | |
d7e74731 | 9488 | c_printchar (value, type, &buf); |
98bfdba5 PA |
9489 | else |
9490 | { | |
9491 | struct value_print_options opts; | |
9492 | ||
9493 | if (baton != NULL) | |
9494 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
9495 | baton->data, | |
9496 | baton->size, | |
9497 | baton->per_cu); | |
9498 | else if (bytes != NULL) | |
9499 | { | |
9500 | v = allocate_value (type); | |
9501 | memcpy (value_contents_writeable (v), bytes, | |
9502 | TYPE_LENGTH (type)); | |
9503 | } | |
9504 | else | |
9505 | v = value_from_longest (type, value); | |
9506 | ||
3e43a32a MS |
9507 | /* Specify decimal so that we do not depend on |
9508 | the radix. */ | |
98bfdba5 PA |
9509 | get_formatted_print_options (&opts, 'd'); |
9510 | opts.raw = 1; | |
d7e74731 | 9511 | value_print (v, &buf, &opts); |
98bfdba5 PA |
9512 | release_value (v); |
9513 | value_free (v); | |
9514 | } | |
9515 | } | |
9516 | ||
9517 | die->building_fullname = 0; | |
9518 | ||
9519 | if (!first) | |
9520 | { | |
9521 | /* Close the argument list, with a space if necessary | |
9522 | (nested templates). */ | |
d7e74731 PA |
9523 | if (!buf.empty () && buf.string ().back () == '>') |
9524 | buf.puts (" >"); | |
98bfdba5 | 9525 | else |
d7e74731 | 9526 | buf.puts (">"); |
98bfdba5 PA |
9527 | } |
9528 | } | |
9529 | ||
9c37b5ae | 9530 | /* For C++ methods, append formal parameter type |
94af9270 | 9531 | information, if PHYSNAME. */ |
6e70227d | 9532 | |
94af9270 | 9533 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 9534 | && cu->language == language_cplus) |
94af9270 KS |
9535 | { |
9536 | struct type *type = read_type_die (die, cu); | |
9537 | ||
d7e74731 | 9538 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 9539 | &type_print_raw_options); |
94af9270 | 9540 | |
9c37b5ae | 9541 | if (cu->language == language_cplus) |
94af9270 | 9542 | { |
60430eff DJ |
9543 | /* Assume that an artificial first parameter is |
9544 | "this", but do not crash if it is not. RealView | |
9545 | marks unnamed (and thus unused) parameters as | |
9546 | artificial; there is no way to differentiate | |
9547 | the two cases. */ | |
94af9270 KS |
9548 | if (TYPE_NFIELDS (type) > 0 |
9549 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 9550 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
9551 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
9552 | 0)))) | |
d7e74731 | 9553 | buf.puts (" const"); |
94af9270 KS |
9554 | } |
9555 | } | |
9556 | ||
d7e74731 | 9557 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
9558 | |
9559 | if (cu->language == language_cplus) | |
34a68019 | 9560 | canonical_name |
322a8516 | 9561 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
9562 | &objfile->per_bfd->storage_obstack); |
9563 | ||
9564 | /* If we only computed INTERMEDIATE_NAME, or if | |
9565 | INTERMEDIATE_NAME is already canonical, then we need to | |
9566 | copy it to the appropriate obstack. */ | |
322a8516 | 9567 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
9568 | name = ((const char *) |
9569 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
9570 | intermediate_name.c_str (), |
9571 | intermediate_name.length ())); | |
34a68019 TT |
9572 | else |
9573 | name = canonical_name; | |
94af9270 KS |
9574 | } |
9575 | } | |
9576 | ||
9577 | return name; | |
9578 | } | |
9579 | ||
0114d602 DJ |
9580 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9581 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9582 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9583 | not have a name. NAME may either be from a previous call to |
9584 | dwarf2_name or NULL. | |
9585 | ||
9c37b5ae | 9586 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9587 | |
9588 | static const char * | |
15d034d0 | 9589 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 9590 | { |
94af9270 KS |
9591 | return dwarf2_compute_name (name, die, cu, 0); |
9592 | } | |
0114d602 | 9593 | |
94af9270 KS |
9594 | /* Construct a physname for the given DIE in CU. NAME may either be |
9595 | from a previous call to dwarf2_name or NULL. The result will be | |
9596 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9597 | name. | |
0114d602 | 9598 | |
9c37b5ae | 9599 | The output string will be canonicalized (if C++). */ |
0114d602 | 9600 | |
94af9270 | 9601 | static const char * |
15d034d0 | 9602 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9603 | { |
bb5ed363 | 9604 | struct objfile *objfile = cu->objfile; |
900e11f9 | 9605 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
9606 | int need_copy = 1; |
9607 | ||
9608 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9609 | on its own. */ | |
9610 | if (!die_needs_namespace (die, cu)) | |
9611 | return dwarf2_compute_name (name, die, cu, 1); | |
9612 | ||
73b9be8b | 9613 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9614 | |
e98c9e7c TT |
9615 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9616 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9617 | if (cu->language == language_rust && mangled != NULL | |
9618 | && strchr (mangled, '{') != NULL) | |
9619 | mangled = NULL; | |
9620 | ||
900e11f9 JK |
9621 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9622 | has computed. */ | |
791afaa2 | 9623 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 9624 | if (mangled != NULL) |
900e11f9 | 9625 | { |
900e11f9 JK |
9626 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9627 | type. It is easier for GDB users to search for such functions as | |
9628 | `name(params)' than `long name(params)'. In such case the minimal | |
9629 | symbol names do not match the full symbol names but for template | |
9630 | functions there is never a need to look up their definition from their | |
9631 | declaration so the only disadvantage remains the minimal symbol | |
9632 | variant `long name(params)' does not have the proper inferior type. | |
9633 | */ | |
9634 | ||
a766d390 DE |
9635 | if (cu->language == language_go) |
9636 | { | |
9637 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9638 | new_symbol_full assumes we return the mangled name. | |
9639 | This just undoes that lie until things are cleaned up. */ | |
a766d390 DE |
9640 | } |
9641 | else | |
9642 | { | |
791afaa2 TT |
9643 | demangled.reset (gdb_demangle (mangled, |
9644 | (DMGL_PARAMS | DMGL_ANSI | |
9645 | | DMGL_RET_DROP))); | |
a766d390 | 9646 | } |
900e11f9 | 9647 | if (demangled) |
791afaa2 | 9648 | canon = demangled.get (); |
900e11f9 JK |
9649 | else |
9650 | { | |
9651 | canon = mangled; | |
9652 | need_copy = 0; | |
9653 | } | |
9654 | } | |
9655 | ||
9656 | if (canon == NULL || check_physname) | |
9657 | { | |
9658 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9659 | ||
9660 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9661 | { | |
9662 | /* It may not mean a bug in GDB. The compiler could also | |
9663 | compute DW_AT_linkage_name incorrectly. But in such case | |
9664 | GDB would need to be bug-to-bug compatible. */ | |
9665 | ||
9666 | complaint (&symfile_complaints, | |
9667 | _("Computed physname <%s> does not match demangled <%s> " | |
9668 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9669 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9670 | objfile_name (objfile)); |
900e11f9 JK |
9671 | |
9672 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9673 | is available here - over computed PHYSNAME. It is safer | |
9674 | against both buggy GDB and buggy compilers. */ | |
9675 | ||
9676 | retval = canon; | |
9677 | } | |
9678 | else | |
9679 | { | |
9680 | retval = physname; | |
9681 | need_copy = 0; | |
9682 | } | |
9683 | } | |
9684 | else | |
9685 | retval = canon; | |
9686 | ||
9687 | if (need_copy) | |
224c3ddb SM |
9688 | retval = ((const char *) |
9689 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9690 | retval, strlen (retval))); | |
900e11f9 | 9691 | |
900e11f9 | 9692 | return retval; |
0114d602 DJ |
9693 | } |
9694 | ||
74921315 KS |
9695 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9696 | a new symbol for it. | |
9697 | ||
9698 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9699 | ||
9700 | static int | |
9701 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9702 | { | |
9703 | struct attribute *attr; | |
9704 | ||
9705 | /* If the die does not have a name, this is not a namespace | |
9706 | alias. */ | |
9707 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9708 | if (attr != NULL) | |
9709 | { | |
9710 | int num; | |
9711 | struct die_info *d = die; | |
9712 | struct dwarf2_cu *imported_cu = cu; | |
9713 | ||
9714 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9715 | keep inspecting DIEs until we hit the underlying import. */ | |
9716 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9717 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9718 | { | |
9719 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
9720 | if (attr == NULL) | |
9721 | break; | |
9722 | ||
9723 | d = follow_die_ref (d, attr, &imported_cu); | |
9724 | if (d->tag != DW_TAG_imported_declaration) | |
9725 | break; | |
9726 | } | |
9727 | ||
9728 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
9729 | { | |
9730 | complaint (&symfile_complaints, | |
9731 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 9732 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
9733 | return 0; |
9734 | } | |
9735 | ||
9736 | if (attr != NULL) | |
9737 | { | |
9738 | struct type *type; | |
9c541725 | 9739 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 9740 | |
9c541725 | 9741 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
9742 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
9743 | { | |
9744 | /* This declaration is a global namespace alias. Add | |
9745 | a symbol for it whose type is the aliased namespace. */ | |
9746 | new_symbol (die, type, cu); | |
9747 | return 1; | |
9748 | } | |
9749 | } | |
9750 | } | |
9751 | ||
9752 | return 0; | |
9753 | } | |
9754 | ||
22cee43f PMR |
9755 | /* Return the using directives repository (global or local?) to use in the |
9756 | current context for LANGUAGE. | |
9757 | ||
9758 | For Ada, imported declarations can materialize renamings, which *may* be | |
9759 | global. However it is impossible (for now?) in DWARF to distinguish | |
9760 | "external" imported declarations and "static" ones. As all imported | |
9761 | declarations seem to be static in all other languages, make them all CU-wide | |
9762 | global only in Ada. */ | |
9763 | ||
9764 | static struct using_direct ** | |
9765 | using_directives (enum language language) | |
9766 | { | |
9767 | if (language == language_ada && context_stack_depth == 0) | |
9768 | return &global_using_directives; | |
9769 | else | |
9770 | return &local_using_directives; | |
9771 | } | |
9772 | ||
27aa8d6a SW |
9773 | /* Read the import statement specified by the given die and record it. */ |
9774 | ||
9775 | static void | |
9776 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
9777 | { | |
bb5ed363 | 9778 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 9779 | struct attribute *import_attr; |
32019081 | 9780 | struct die_info *imported_die, *child_die; |
de4affc9 | 9781 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 9782 | const char *imported_name; |
794684b6 | 9783 | const char *imported_name_prefix; |
13387711 SW |
9784 | const char *canonical_name; |
9785 | const char *import_alias; | |
9786 | const char *imported_declaration = NULL; | |
794684b6 | 9787 | const char *import_prefix; |
eb1e02fd | 9788 | std::vector<const char *> excludes; |
13387711 | 9789 | |
27aa8d6a SW |
9790 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
9791 | if (import_attr == NULL) | |
9792 | { | |
9793 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9794 | dwarf_tag_name (die->tag)); | |
9795 | return; | |
9796 | } | |
9797 | ||
de4affc9 CC |
9798 | imported_cu = cu; |
9799 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
9800 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
9801 | if (imported_name == NULL) |
9802 | { | |
9803 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
9804 | ||
9805 | The import in the following code: | |
9806 | namespace A | |
9807 | { | |
9808 | typedef int B; | |
9809 | } | |
9810 | ||
9811 | int main () | |
9812 | { | |
9813 | using A::B; | |
9814 | B b; | |
9815 | return b; | |
9816 | } | |
9817 | ||
9818 | ... | |
9819 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
9820 | <52> DW_AT_decl_file : 1 | |
9821 | <53> DW_AT_decl_line : 6 | |
9822 | <54> DW_AT_import : <0x75> | |
9823 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
9824 | <59> DW_AT_name : B | |
9825 | <5b> DW_AT_decl_file : 1 | |
9826 | <5c> DW_AT_decl_line : 2 | |
9827 | <5d> DW_AT_type : <0x6e> | |
9828 | ... | |
9829 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
9830 | <76> DW_AT_byte_size : 4 | |
9831 | <77> DW_AT_encoding : 5 (signed) | |
9832 | ||
9833 | imports the wrong die ( 0x75 instead of 0x58 ). | |
9834 | This case will be ignored until the gcc bug is fixed. */ | |
9835 | return; | |
9836 | } | |
9837 | ||
82856980 SW |
9838 | /* Figure out the local name after import. */ |
9839 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 9840 | |
794684b6 SW |
9841 | /* Figure out where the statement is being imported to. */ |
9842 | import_prefix = determine_prefix (die, cu); | |
9843 | ||
9844 | /* Figure out what the scope of the imported die is and prepend it | |
9845 | to the name of the imported die. */ | |
de4affc9 | 9846 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 9847 | |
f55ee35c JK |
9848 | if (imported_die->tag != DW_TAG_namespace |
9849 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 9850 | { |
13387711 SW |
9851 | imported_declaration = imported_name; |
9852 | canonical_name = imported_name_prefix; | |
794684b6 | 9853 | } |
13387711 | 9854 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 9855 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
9856 | imported_name_prefix, |
9857 | (cu->language == language_d ? "." : "::"), | |
9858 | imported_name, (char *) NULL); | |
13387711 SW |
9859 | else |
9860 | canonical_name = imported_name; | |
794684b6 | 9861 | |
32019081 JK |
9862 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
9863 | for (child_die = die->child; child_die && child_die->tag; | |
9864 | child_die = sibling_die (child_die)) | |
9865 | { | |
9866 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
9867 | represented by an imported module entry with an import attribute | |
9868 | referring to the module and owned entries corresponding to those | |
9869 | entities that are renamed as part of being imported. */ | |
9870 | ||
9871 | if (child_die->tag != DW_TAG_imported_declaration) | |
9872 | { | |
9873 | complaint (&symfile_complaints, | |
9874 | _("child DW_TAG_imported_declaration expected " | |
9875 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 9876 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9877 | continue; |
9878 | } | |
9879 | ||
9880 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
9881 | if (import_attr == NULL) | |
9882 | { | |
9883 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9884 | dwarf_tag_name (child_die->tag)); | |
9885 | continue; | |
9886 | } | |
9887 | ||
9888 | imported_cu = cu; | |
9889 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9890 | &imported_cu); | |
9891 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9892 | if (imported_name == NULL) | |
9893 | { | |
9894 | complaint (&symfile_complaints, | |
9895 | _("child DW_TAG_imported_declaration has unknown " | |
9896 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 9897 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9898 | continue; |
9899 | } | |
9900 | ||
eb1e02fd | 9901 | excludes.push_back (imported_name); |
32019081 JK |
9902 | |
9903 | process_die (child_die, cu); | |
9904 | } | |
9905 | ||
22cee43f PMR |
9906 | add_using_directive (using_directives (cu->language), |
9907 | import_prefix, | |
9908 | canonical_name, | |
9909 | import_alias, | |
9910 | imported_declaration, | |
9911 | excludes, | |
9912 | 0, | |
9913 | &objfile->objfile_obstack); | |
27aa8d6a SW |
9914 | } |
9915 | ||
5230b05a WT |
9916 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
9917 | types, but gives them a size of zero. Starting with version 14, | |
9918 | ICC is compatible with GCC. */ | |
9919 | ||
9920 | static int | |
9921 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
9922 | { | |
9923 | if (!cu->checked_producer) | |
9924 | check_producer (cu); | |
9925 | ||
9926 | return cu->producer_is_icc_lt_14; | |
9927 | } | |
9928 | ||
1b80a9fa JK |
9929 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9930 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9931 | this, it was first present in GCC release 4.3.0. */ | |
9932 | ||
9933 | static int | |
9934 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9935 | { | |
9936 | if (!cu->checked_producer) | |
9937 | check_producer (cu); | |
9938 | ||
9939 | return cu->producer_is_gcc_lt_4_3; | |
9940 | } | |
9941 | ||
d721ba37 PA |
9942 | static file_and_directory |
9943 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 9944 | { |
d721ba37 PA |
9945 | file_and_directory res; |
9946 | ||
9291a0cd TT |
9947 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9948 | is not a source language identifier. */ | |
d721ba37 PA |
9949 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
9950 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9951 | |
d721ba37 PA |
9952 | if (res.comp_dir == NULL |
9953 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
9954 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 9955 | { |
d721ba37 PA |
9956 | res.comp_dir_storage = ldirname (res.name); |
9957 | if (!res.comp_dir_storage.empty ()) | |
9958 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 9959 | } |
d721ba37 | 9960 | if (res.comp_dir != NULL) |
9291a0cd TT |
9961 | { |
9962 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9963 | directory, get rid of it. */ | |
d721ba37 | 9964 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 9965 | |
d721ba37 PA |
9966 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
9967 | res.comp_dir = cp + 1; | |
9291a0cd TT |
9968 | } |
9969 | ||
d721ba37 PA |
9970 | if (res.name == NULL) |
9971 | res.name = "<unknown>"; | |
9972 | ||
9973 | return res; | |
9291a0cd TT |
9974 | } |
9975 | ||
f4dc4d17 DE |
9976 | /* Handle DW_AT_stmt_list for a compilation unit. |
9977 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9978 | COMP_DIR is the compilation directory. LOWPC is passed to |
9979 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9980 | |
9981 | static void | |
9982 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9983 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9984 | { |
527f3840 | 9985 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9986 | struct attribute *attr; |
527f3840 JK |
9987 | struct line_header line_header_local; |
9988 | hashval_t line_header_local_hash; | |
9989 | unsigned u; | |
9990 | void **slot; | |
9991 | int decode_mapping; | |
2ab95328 | 9992 | |
f4dc4d17 DE |
9993 | gdb_assert (! cu->per_cu->is_debug_types); |
9994 | ||
2ab95328 | 9995 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9996 | if (attr == NULL) |
9997 | return; | |
9998 | ||
9c541725 | 9999 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10000 | |
10001 | /* The line header hash table is only created if needed (it exists to | |
10002 | prevent redundant reading of the line table for partial_units). | |
10003 | If we're given a partial_unit, we'll need it. If we're given a | |
10004 | compile_unit, then use the line header hash table if it's already | |
10005 | created, but don't create one just yet. */ | |
10006 | ||
10007 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10008 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10009 | { |
527f3840 JK |
10010 | dwarf2_per_objfile->line_header_hash |
10011 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
10012 | line_header_eq_voidp, | |
10013 | free_line_header_voidp, | |
10014 | &objfile->objfile_obstack, | |
10015 | hashtab_obstack_allocate, | |
10016 | dummy_obstack_deallocate); | |
10017 | } | |
2ab95328 | 10018 | |
9c541725 | 10019 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10020 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10021 | line_header_local_hash = line_header_hash (&line_header_local); | |
10022 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10023 | { | |
10024 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10025 | &line_header_local, | |
10026 | line_header_local_hash, NO_INSERT); | |
10027 | ||
10028 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10029 | is not present in *SLOT (since if there is something in *SLOT then | |
10030 | it will be for a partial_unit). */ | |
10031 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10032 | { |
527f3840 | 10033 | gdb_assert (*slot != NULL); |
9a3c8263 | 10034 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10035 | return; |
dee91e82 | 10036 | } |
2ab95328 | 10037 | } |
527f3840 JK |
10038 | |
10039 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10040 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10041 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10042 | if (lh == NULL) | |
527f3840 | 10043 | return; |
4c8aa72d PA |
10044 | |
10045 | cu->line_header = lh.release (); | |
10046 | cu->line_header_die_owner = die; | |
527f3840 JK |
10047 | |
10048 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10049 | slot = NULL; | |
10050 | else | |
10051 | { | |
10052 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10053 | &line_header_local, | |
10054 | line_header_local_hash, INSERT); | |
10055 | gdb_assert (slot != NULL); | |
10056 | } | |
10057 | if (slot != NULL && *slot == NULL) | |
10058 | { | |
10059 | /* This newly decoded line number information unit will be owned | |
10060 | by line_header_hash hash table. */ | |
10061 | *slot = cu->line_header; | |
4c8aa72d | 10062 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10063 | } |
10064 | else | |
10065 | { | |
10066 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10067 | may be already used by multiple CUs. Create only temporary decoded | |
10068 | line_header for this CU - it may happen at most once for each line | |
10069 | number information unit. And if we're not using line_header_hash | |
10070 | then this is what we want as well. */ | |
10071 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10072 | } |
10073 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10074 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10075 | decode_mapping); | |
fff8551c | 10076 | |
2ab95328 TT |
10077 | } |
10078 | ||
95554aad | 10079 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10080 | |
c906108c | 10081 | static void |
e7c27a73 | 10082 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10083 | { |
dee91e82 | 10084 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10085 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10086 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10087 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10088 | struct attribute *attr; | |
c906108c | 10089 | struct die_info *child_die; |
e142c38c | 10090 | CORE_ADDR baseaddr; |
6e70227d | 10091 | |
e142c38c | 10092 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 10093 | |
fae299cd | 10094 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10095 | |
10096 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10097 | from finish_block. */ | |
2acceee2 | 10098 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10099 | lowpc = highpc; |
3e29f34a | 10100 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10101 | |
d721ba37 | 10102 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10103 | |
95554aad | 10104 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 10105 | |
f4b8a18d KW |
10106 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10107 | standardised yet. As a workaround for the language detection we fall | |
10108 | back to the DW_AT_producer string. */ | |
10109 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10110 | cu->language = language_opencl; | |
10111 | ||
3019eac3 DE |
10112 | /* Similar hack for Go. */ |
10113 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10114 | set_cu_language (DW_LANG_Go, cu); | |
10115 | ||
d721ba37 | 10116 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10117 | |
10118 | /* Decode line number information if present. We do this before | |
10119 | processing child DIEs, so that the line header table is available | |
10120 | for DW_AT_decl_file. */ | |
d721ba37 | 10121 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10122 | |
10123 | /* Process all dies in compilation unit. */ | |
10124 | if (die->child != NULL) | |
10125 | { | |
10126 | child_die = die->child; | |
10127 | while (child_die && child_die->tag) | |
10128 | { | |
10129 | process_die (child_die, cu); | |
10130 | child_die = sibling_die (child_die); | |
10131 | } | |
10132 | } | |
10133 | ||
10134 | /* Decode macro information, if present. Dwarf 2 macro information | |
10135 | refers to information in the line number info statement program | |
10136 | header, so we can only read it if we've read the header | |
10137 | successfully. */ | |
0af92d60 JK |
10138 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10139 | if (attr == NULL) | |
10140 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10141 | if (attr && cu->line_header) |
10142 | { | |
10143 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
10144 | complaint (&symfile_complaints, | |
0af92d60 | 10145 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10146 | |
43f3e411 | 10147 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10148 | } |
10149 | else | |
10150 | { | |
10151 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10152 | if (attr && cu->line_header) | |
10153 | { | |
10154 | unsigned int macro_offset = DW_UNSND (attr); | |
10155 | ||
43f3e411 | 10156 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10157 | } |
10158 | } | |
3019eac3 DE |
10159 | } |
10160 | ||
f4dc4d17 DE |
10161 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
10162 | Create the set of symtabs used by this TU, or if this TU is sharing | |
10163 | symtabs with another TU and the symtabs have already been created | |
10164 | then restore those symtabs in the line header. | |
10165 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
10166 | |
10167 | static void | |
f4dc4d17 | 10168 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 10169 | { |
f4dc4d17 DE |
10170 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
10171 | struct type_unit_group *tu_group; | |
10172 | int first_time; | |
3019eac3 | 10173 | struct attribute *attr; |
9c541725 | 10174 | unsigned int i; |
0186c6a7 | 10175 | struct signatured_type *sig_type; |
3019eac3 | 10176 | |
f4dc4d17 | 10177 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10178 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10179 | |
f4dc4d17 | 10180 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 10181 | |
f4dc4d17 | 10182 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10183 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
10184 | if (sig_type->type_unit_group == NULL) |
10185 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
10186 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
10187 | |
10188 | /* If we've already processed this stmt_list there's no real need to | |
10189 | do it again, we could fake it and just recreate the part we need | |
10190 | (file name,index -> symtab mapping). If data shows this optimization | |
10191 | is useful we can do it then. */ | |
43f3e411 | 10192 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10193 | |
10194 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10195 | debug info. */ | |
fff8551c | 10196 | line_header_up lh; |
f4dc4d17 | 10197 | if (attr != NULL) |
3019eac3 | 10198 | { |
9c541725 | 10199 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
10200 | lh = dwarf_decode_line_header (line_offset, cu); |
10201 | } | |
10202 | if (lh == NULL) | |
10203 | { | |
10204 | if (first_time) | |
10205 | dwarf2_start_symtab (cu, "", NULL, 0); | |
10206 | else | |
10207 | { | |
10208 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 10209 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10210 | } |
f4dc4d17 | 10211 | return; |
3019eac3 DE |
10212 | } |
10213 | ||
4c8aa72d PA |
10214 | cu->line_header = lh.release (); |
10215 | cu->line_header_die_owner = die; | |
3019eac3 | 10216 | |
f4dc4d17 DE |
10217 | if (first_time) |
10218 | { | |
43f3e411 | 10219 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 10220 | |
1fd60fc0 DE |
10221 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10222 | still initializing it, and our caller (a few levels up) | |
10223 | process_full_type_unit still needs to know if this is the first | |
10224 | time. */ | |
10225 | ||
4c8aa72d PA |
10226 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
10227 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
10228 | cu->line_header->file_names.size ()); | |
3019eac3 | 10229 | |
4c8aa72d | 10230 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10231 | { |
4c8aa72d | 10232 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 10233 | |
4c8aa72d | 10234 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 10235 | |
f4dc4d17 DE |
10236 | if (current_subfile->symtab == NULL) |
10237 | { | |
4c8aa72d PA |
10238 | /* NOTE: start_subfile will recognize when it's been |
10239 | passed a file it has already seen. So we can't | |
10240 | assume there's a simple mapping from | |
10241 | cu->line_header->file_names to subfiles, plus | |
10242 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
10243 | current_subfile->symtab |
10244 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
10245 | } |
10246 | ||
8c43009f PA |
10247 | fe.symtab = current_subfile->symtab; |
10248 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
10249 | } |
10250 | } | |
10251 | else | |
3019eac3 | 10252 | { |
0ab9ce85 | 10253 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10254 | |
4c8aa72d | 10255 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10256 | { |
4c8aa72d | 10257 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 10258 | |
4c8aa72d | 10259 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10260 | } |
3019eac3 DE |
10261 | } |
10262 | ||
f4dc4d17 DE |
10263 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10264 | so they don't have a "real" (so to speak) symtab anyway. | |
10265 | There is later code that will assign the main symtab to all symbols | |
10266 | that don't have one. We need to handle the case of a symbol with a | |
10267 | missing symtab (DW_AT_decl_file) anyway. */ | |
10268 | } | |
3019eac3 | 10269 | |
f4dc4d17 DE |
10270 | /* Process DW_TAG_type_unit. |
10271 | For TUs we want to skip the first top level sibling if it's not the | |
10272 | actual type being defined by this TU. In this case the first top | |
10273 | level sibling is there to provide context only. */ | |
3019eac3 | 10274 | |
f4dc4d17 DE |
10275 | static void |
10276 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10277 | { | |
10278 | struct die_info *child_die; | |
3019eac3 | 10279 | |
f4dc4d17 DE |
10280 | prepare_one_comp_unit (cu, die, language_minimal); |
10281 | ||
10282 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10283 | We do this before processing child DIEs, so that the line header table | |
10284 | is available for DW_AT_decl_file. */ | |
10285 | setup_type_unit_groups (die, cu); | |
10286 | ||
10287 | if (die->child != NULL) | |
10288 | { | |
10289 | child_die = die->child; | |
10290 | while (child_die && child_die->tag) | |
10291 | { | |
10292 | process_die (child_die, cu); | |
10293 | child_die = sibling_die (child_die); | |
10294 | } | |
10295 | } | |
3019eac3 DE |
10296 | } |
10297 | \f | |
80626a55 DE |
10298 | /* DWO/DWP files. |
10299 | ||
10300 | http://gcc.gnu.org/wiki/DebugFission | |
10301 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10302 | ||
10303 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10304 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10305 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10306 | |
10307 | static hashval_t | |
10308 | hash_dwo_file (const void *item) | |
10309 | { | |
9a3c8263 | 10310 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10311 | hashval_t hash; |
3019eac3 | 10312 | |
a2ce51a0 DE |
10313 | hash = htab_hash_string (dwo_file->dwo_name); |
10314 | if (dwo_file->comp_dir != NULL) | |
10315 | hash += htab_hash_string (dwo_file->comp_dir); | |
10316 | return hash; | |
3019eac3 DE |
10317 | } |
10318 | ||
10319 | static int | |
10320 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10321 | { | |
9a3c8263 SM |
10322 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10323 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10324 | |
a2ce51a0 DE |
10325 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10326 | return 0; | |
10327 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10328 | return lhs->comp_dir == rhs->comp_dir; | |
10329 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10330 | } |
10331 | ||
10332 | /* Allocate a hash table for DWO files. */ | |
10333 | ||
10334 | static htab_t | |
10335 | allocate_dwo_file_hash_table (void) | |
10336 | { | |
10337 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10338 | ||
10339 | return htab_create_alloc_ex (41, | |
10340 | hash_dwo_file, | |
10341 | eq_dwo_file, | |
10342 | NULL, | |
10343 | &objfile->objfile_obstack, | |
10344 | hashtab_obstack_allocate, | |
10345 | dummy_obstack_deallocate); | |
10346 | } | |
10347 | ||
80626a55 DE |
10348 | /* Lookup DWO file DWO_NAME. */ |
10349 | ||
10350 | static void ** | |
0ac5b59e | 10351 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
10352 | { |
10353 | struct dwo_file find_entry; | |
10354 | void **slot; | |
10355 | ||
10356 | if (dwarf2_per_objfile->dwo_files == NULL) | |
10357 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
10358 | ||
10359 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
10360 | find_entry.dwo_name = dwo_name; |
10361 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
10362 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
10363 | ||
10364 | return slot; | |
10365 | } | |
10366 | ||
3019eac3 DE |
10367 | static hashval_t |
10368 | hash_dwo_unit (const void *item) | |
10369 | { | |
9a3c8263 | 10370 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
10371 | |
10372 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
10373 | return dwo_unit->signature; | |
10374 | } | |
10375 | ||
10376 | static int | |
10377 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
10378 | { | |
9a3c8263 SM |
10379 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
10380 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
10381 | |
10382 | /* The signature is assumed to be unique within the DWO file. | |
10383 | So while object file CU dwo_id's always have the value zero, | |
10384 | that's OK, assuming each object file DWO file has only one CU, | |
10385 | and that's the rule for now. */ | |
10386 | return lhs->signature == rhs->signature; | |
10387 | } | |
10388 | ||
10389 | /* Allocate a hash table for DWO CUs,TUs. | |
10390 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
10391 | ||
10392 | static htab_t | |
10393 | allocate_dwo_unit_table (struct objfile *objfile) | |
10394 | { | |
10395 | /* Start out with a pretty small number. | |
10396 | Generally DWO files contain only one CU and maybe some TUs. */ | |
10397 | return htab_create_alloc_ex (3, | |
10398 | hash_dwo_unit, | |
10399 | eq_dwo_unit, | |
10400 | NULL, | |
10401 | &objfile->objfile_obstack, | |
10402 | hashtab_obstack_allocate, | |
10403 | dummy_obstack_deallocate); | |
10404 | } | |
10405 | ||
80626a55 | 10406 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 10407 | |
19c3d4c9 | 10408 | struct create_dwo_cu_data |
3019eac3 DE |
10409 | { |
10410 | struct dwo_file *dwo_file; | |
19c3d4c9 | 10411 | struct dwo_unit dwo_unit; |
3019eac3 DE |
10412 | }; |
10413 | ||
19c3d4c9 | 10414 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
10415 | |
10416 | static void | |
19c3d4c9 DE |
10417 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
10418 | const gdb_byte *info_ptr, | |
10419 | struct die_info *comp_unit_die, | |
10420 | int has_children, | |
10421 | void *datap) | |
3019eac3 DE |
10422 | { |
10423 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 10424 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 10425 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 10426 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 10427 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 10428 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 10429 | struct attribute *attr; |
3019eac3 DE |
10430 | |
10431 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
10432 | if (attr == NULL) | |
10433 | { | |
19c3d4c9 DE |
10434 | complaint (&symfile_complaints, |
10435 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
10436 | " its dwo_id [in module %s]"), | |
9c541725 | 10437 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
10438 | return; |
10439 | } | |
10440 | ||
3019eac3 DE |
10441 | dwo_unit->dwo_file = dwo_file; |
10442 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 10443 | dwo_unit->section = section; |
9c541725 | 10444 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
10445 | dwo_unit->length = cu->per_cu->length; |
10446 | ||
b4f54984 | 10447 | if (dwarf_read_debug) |
4031ecc5 | 10448 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
10449 | to_underlying (sect_off), |
10450 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
10451 | } |
10452 | ||
33c5cd75 | 10453 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 10454 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 10455 | |
33c5cd75 DB |
10456 | static void |
10457 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
10458 | htab_t &cus_htab) | |
3019eac3 DE |
10459 | { |
10460 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
33c5cd75 | 10461 | const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev; |
d521ce57 | 10462 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 10463 | |
33c5cd75 DB |
10464 | dwarf2_read_section (objfile, §ion); |
10465 | info_ptr = section.buffer; | |
3019eac3 DE |
10466 | |
10467 | if (info_ptr == NULL) | |
33c5cd75 | 10468 | return; |
3019eac3 | 10469 | |
b4f54984 | 10470 | if (dwarf_read_debug) |
19c3d4c9 DE |
10471 | { |
10472 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
10473 | get_section_name (§ion), |
10474 | get_section_file_name (§ion)); | |
19c3d4c9 | 10475 | } |
3019eac3 | 10476 | |
33c5cd75 | 10477 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
10478 | while (info_ptr < end_ptr) |
10479 | { | |
10480 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
10481 | struct create_dwo_cu_data create_dwo_cu_data; |
10482 | struct dwo_unit *dwo_unit; | |
10483 | void **slot; | |
10484 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 10485 | |
19c3d4c9 DE |
10486 | memset (&create_dwo_cu_data.dwo_unit, 0, |
10487 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
10488 | memset (&per_cu, 0, sizeof (per_cu)); |
10489 | per_cu.objfile = objfile; | |
10490 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
10491 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
10492 | per_cu.section = §ion; | |
c5ed0576 | 10493 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
10494 | |
10495 | init_cutu_and_read_dies_no_follow ( | |
10496 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
10497 | info_ptr += per_cu.length; | |
10498 | ||
10499 | // If the unit could not be parsed, skip it. | |
10500 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
10501 | continue; | |
3019eac3 | 10502 | |
33c5cd75 DB |
10503 | if (cus_htab == NULL) |
10504 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 10505 | |
33c5cd75 DB |
10506 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
10507 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
10508 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
10509 | gdb_assert (slot != NULL); | |
10510 | if (*slot != NULL) | |
19c3d4c9 | 10511 | { |
33c5cd75 DB |
10512 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
10513 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 10514 | |
33c5cd75 DB |
10515 | complaint (&symfile_complaints, |
10516 | _("debug cu entry at offset 0x%x is duplicate to" | |
10517 | " the entry at offset 0x%x, signature %s"), | |
10518 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
10519 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 10520 | } |
33c5cd75 | 10521 | *slot = (void *)dwo_unit; |
3019eac3 | 10522 | } |
3019eac3 DE |
10523 | } |
10524 | ||
80626a55 DE |
10525 | /* DWP file .debug_{cu,tu}_index section format: |
10526 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
10527 | ||
d2415c6c DE |
10528 | DWP Version 1: |
10529 | ||
80626a55 DE |
10530 | Both index sections have the same format, and serve to map a 64-bit |
10531 | signature to a set of section numbers. Each section begins with a header, | |
10532 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
10533 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
10534 | aligned at 8-byte boundaries in the file. | |
10535 | ||
d2415c6c DE |
10536 | The index section header consists of: |
10537 | ||
10538 | V, 32 bit version number | |
10539 | -, 32 bits unused | |
10540 | N, 32 bit number of compilation units or type units in the index | |
10541 | M, 32 bit number of slots in the hash table | |
80626a55 | 10542 | |
d2415c6c | 10543 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 10544 | |
d2415c6c DE |
10545 | The hash table begins at offset 16 in the section, and consists of an array |
10546 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
10547 | order of the application binary). Unused slots in the hash table are 0. | |
10548 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 10549 | |
d2415c6c DE |
10550 | The parallel table begins immediately after the hash table |
10551 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
10552 | array of 32-bit indexes (using the byte order of the application binary), | |
10553 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
10554 | table contains a 32-bit index into the pool of section numbers. For unused | |
10555 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 10556 | |
73869dc2 DE |
10557 | The pool of section numbers begins immediately following the hash table |
10558 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
10559 | section numbers consists of an array of 32-bit words (using the byte order | |
10560 | of the application binary). Each item in the array is indexed starting | |
10561 | from 0. The hash table entry provides the index of the first section | |
10562 | number in the set. Additional section numbers in the set follow, and the | |
10563 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
10564 | ||
10565 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10566 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10567 | be the second entry. Other members of the set may follow in any order. | |
10568 | ||
10569 | --- | |
10570 | ||
10571 | DWP Version 2: | |
10572 | ||
10573 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
10574 | and the entries in the index tables are now offsets into these sections. | |
10575 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10576 | section. | |
10577 | ||
10578 | Index Section Contents: | |
10579 | Header | |
10580 | Hash Table of Signatures dwp_hash_table.hash_table | |
10581 | Parallel Table of Indices dwp_hash_table.unit_table | |
10582 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
10583 | Table of Section Sizes dwp_hash_table.v2.sizes | |
10584 | ||
10585 | The index section header consists of: | |
10586 | ||
10587 | V, 32 bit version number | |
10588 | L, 32 bit number of columns in the table of section offsets | |
10589 | N, 32 bit number of compilation units or type units in the index | |
10590 | M, 32 bit number of slots in the hash table | |
10591 | ||
10592 | Numbers are recorded using the byte order of the application binary. | |
10593 | ||
10594 | The hash table has the same format as version 1. | |
10595 | The parallel table of indices has the same format as version 1, | |
10596 | except that the entries are origin-1 indices into the table of sections | |
10597 | offsets and the table of section sizes. | |
10598 | ||
10599 | The table of offsets begins immediately following the parallel table | |
10600 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10601 | a two-dimensional array of 32-bit words (using the byte order of the | |
10602 | application binary), with L columns and N+1 rows, in row-major order. | |
10603 | Each row in the array is indexed starting from 0. The first row provides | |
10604 | a key to the remaining rows: each column in this row provides an identifier | |
10605 | for a debug section, and the offsets in the same column of subsequent rows | |
10606 | refer to that section. The section identifiers are: | |
10607 | ||
10608 | DW_SECT_INFO 1 .debug_info.dwo | |
10609 | DW_SECT_TYPES 2 .debug_types.dwo | |
10610 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10611 | DW_SECT_LINE 4 .debug_line.dwo | |
10612 | DW_SECT_LOC 5 .debug_loc.dwo | |
10613 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10614 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10615 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10616 | ||
10617 | The offsets provided by the CU and TU index sections are the base offsets | |
10618 | for the contributions made by each CU or TU to the corresponding section | |
10619 | in the package file. Each CU and TU header contains an abbrev_offset | |
10620 | field, used to find the abbreviations table for that CU or TU within the | |
10621 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10622 | be interpreted as relative to the base offset given in the index section. | |
10623 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10624 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10625 | and offsets into other debug sections obtained from DWARF attributes should | |
10626 | also be interpreted as relative to the corresponding base offset. | |
10627 | ||
10628 | The table of sizes begins immediately following the table of offsets. | |
10629 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10630 | with L columns and N rows, in row-major order. Each row in the array is | |
10631 | indexed starting from 1 (row 0 is shared by the two tables). | |
10632 | ||
10633 | --- | |
10634 | ||
10635 | Hash table lookup is handled the same in version 1 and 2: | |
10636 | ||
10637 | We assume that N and M will not exceed 2^32 - 1. | |
10638 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10639 | ||
d2415c6c DE |
10640 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10641 | in the hash table is located as follows: | |
80626a55 | 10642 | |
d2415c6c DE |
10643 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10644 | the low-order k bits all set to 1. | |
80626a55 | 10645 | |
d2415c6c | 10646 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10647 | |
d2415c6c DE |
10648 | 3) If the hash table entry at index H matches the signature, use that |
10649 | entry. If the hash table entry at index H is unused (all zeroes), | |
10650 | terminate the search: the signature is not present in the table. | |
80626a55 | 10651 | |
d2415c6c | 10652 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10653 | |
d2415c6c | 10654 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10655 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10656 | |
10657 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10658 | .debug_{info,types}.dwo in DWP_FILE. | |
10659 | Returns NULL if there isn't one. | |
10660 | Note: This function processes DWP files only, not DWO files. */ | |
10661 | ||
10662 | static struct dwp_hash_table * | |
10663 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10664 | { | |
10665 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10666 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10667 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10668 | struct dwarf2_section_info *index; |
73869dc2 | 10669 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10670 | struct dwp_hash_table *htab; |
10671 | ||
10672 | if (is_debug_types) | |
10673 | index = &dwp_file->sections.tu_index; | |
10674 | else | |
10675 | index = &dwp_file->sections.cu_index; | |
10676 | ||
10677 | if (dwarf2_section_empty_p (index)) | |
10678 | return NULL; | |
10679 | dwarf2_read_section (objfile, index); | |
10680 | ||
10681 | index_ptr = index->buffer; | |
10682 | index_end = index_ptr + index->size; | |
10683 | ||
10684 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10685 | index_ptr += 4; |
10686 | if (version == 2) | |
10687 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10688 | else | |
10689 | nr_columns = 0; | |
10690 | index_ptr += 4; | |
80626a55 DE |
10691 | nr_units = read_4_bytes (dbfd, index_ptr); |
10692 | index_ptr += 4; | |
10693 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10694 | index_ptr += 4; | |
10695 | ||
73869dc2 | 10696 | if (version != 1 && version != 2) |
80626a55 | 10697 | { |
21aa081e | 10698 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10699 | " [in module %s]"), |
21aa081e | 10700 | pulongest (version), dwp_file->name); |
80626a55 DE |
10701 | } |
10702 | if (nr_slots != (nr_slots & -nr_slots)) | |
10703 | { | |
21aa081e | 10704 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10705 | " is not power of 2 [in module %s]"), |
21aa081e | 10706 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10707 | } |
10708 | ||
10709 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10710 | htab->version = version; |
10711 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10712 | htab->nr_units = nr_units; |
10713 | htab->nr_slots = nr_slots; | |
10714 | htab->hash_table = index_ptr; | |
10715 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10716 | |
10717 | /* Exit early if the table is empty. */ | |
10718 | if (nr_slots == 0 || nr_units == 0 | |
10719 | || (version == 2 && nr_columns == 0)) | |
10720 | { | |
10721 | /* All must be zero. */ | |
10722 | if (nr_slots != 0 || nr_units != 0 | |
10723 | || (version == 2 && nr_columns != 0)) | |
10724 | { | |
10725 | complaint (&symfile_complaints, | |
10726 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
10727 | " all zero [in modules %s]"), | |
10728 | dwp_file->name); | |
10729 | } | |
10730 | return htab; | |
10731 | } | |
10732 | ||
10733 | if (version == 1) | |
10734 | { | |
10735 | htab->section_pool.v1.indices = | |
10736 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10737 | /* It's harder to decide whether the section is too small in v1. | |
10738 | V1 is deprecated anyway so we punt. */ | |
10739 | } | |
10740 | else | |
10741 | { | |
10742 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10743 | int *ids = htab->section_pool.v2.section_ids; | |
10744 | /* Reverse map for error checking. */ | |
10745 | int ids_seen[DW_SECT_MAX + 1]; | |
10746 | int i; | |
10747 | ||
10748 | if (nr_columns < 2) | |
10749 | { | |
10750 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
10751 | " in section table [in module %s]"), | |
10752 | dwp_file->name); | |
10753 | } | |
10754 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
10755 | { | |
10756 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
10757 | " in section table [in module %s]"), | |
10758 | dwp_file->name); | |
10759 | } | |
10760 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10761 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10762 | for (i = 0; i < nr_columns; ++i) | |
10763 | { | |
10764 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
10765 | ||
10766 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
10767 | { | |
10768 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
10769 | " in section table [in module %s]"), | |
10770 | id, dwp_file->name); | |
10771 | } | |
10772 | if (ids_seen[id] != -1) | |
10773 | { | |
10774 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
10775 | " id %d in section table [in module %s]"), | |
10776 | id, dwp_file->name); | |
10777 | } | |
10778 | ids_seen[id] = i; | |
10779 | ids[i] = id; | |
10780 | } | |
10781 | /* Must have exactly one info or types section. */ | |
10782 | if (((ids_seen[DW_SECT_INFO] != -1) | |
10783 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
10784 | != 1) | |
10785 | { | |
10786 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
10787 | " DWO info/types section [in module %s]"), | |
10788 | dwp_file->name); | |
10789 | } | |
10790 | /* Must have an abbrev section. */ | |
10791 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
10792 | { | |
10793 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
10794 | " section [in module %s]"), | |
10795 | dwp_file->name); | |
10796 | } | |
10797 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
10798 | htab->section_pool.v2.sizes = | |
10799 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
10800 | * nr_units * nr_columns); | |
10801 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
10802 | * nr_units * nr_columns)) | |
10803 | > index_end) | |
10804 | { | |
10805 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
10806 | " [in module %s]"), | |
10807 | dwp_file->name); | |
10808 | } | |
10809 | } | |
80626a55 DE |
10810 | |
10811 | return htab; | |
10812 | } | |
10813 | ||
10814 | /* Update SECTIONS with the data from SECTP. | |
10815 | ||
10816 | This function is like the other "locate" section routines that are | |
10817 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 10818 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
10819 | |
10820 | The result is non-zero for success, or zero if an error was found. */ | |
10821 | ||
10822 | static int | |
73869dc2 DE |
10823 | locate_v1_virtual_dwo_sections (asection *sectp, |
10824 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
10825 | { |
10826 | const struct dwop_section_names *names = &dwop_section_names; | |
10827 | ||
10828 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10829 | { | |
10830 | /* There can be only one. */ | |
049412e3 | 10831 | if (sections->abbrev.s.section != NULL) |
80626a55 | 10832 | return 0; |
049412e3 | 10833 | sections->abbrev.s.section = sectp; |
80626a55 DE |
10834 | sections->abbrev.size = bfd_get_section_size (sectp); |
10835 | } | |
10836 | else if (section_is_p (sectp->name, &names->info_dwo) | |
10837 | || section_is_p (sectp->name, &names->types_dwo)) | |
10838 | { | |
10839 | /* There can be only one. */ | |
049412e3 | 10840 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 10841 | return 0; |
049412e3 | 10842 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
10843 | sections->info_or_types.size = bfd_get_section_size (sectp); |
10844 | } | |
10845 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10846 | { | |
10847 | /* There can be only one. */ | |
049412e3 | 10848 | if (sections->line.s.section != NULL) |
80626a55 | 10849 | return 0; |
049412e3 | 10850 | sections->line.s.section = sectp; |
80626a55 DE |
10851 | sections->line.size = bfd_get_section_size (sectp); |
10852 | } | |
10853 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10854 | { | |
10855 | /* There can be only one. */ | |
049412e3 | 10856 | if (sections->loc.s.section != NULL) |
80626a55 | 10857 | return 0; |
049412e3 | 10858 | sections->loc.s.section = sectp; |
80626a55 DE |
10859 | sections->loc.size = bfd_get_section_size (sectp); |
10860 | } | |
10861 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10862 | { | |
10863 | /* There can be only one. */ | |
049412e3 | 10864 | if (sections->macinfo.s.section != NULL) |
80626a55 | 10865 | return 0; |
049412e3 | 10866 | sections->macinfo.s.section = sectp; |
80626a55 DE |
10867 | sections->macinfo.size = bfd_get_section_size (sectp); |
10868 | } | |
10869 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10870 | { | |
10871 | /* There can be only one. */ | |
049412e3 | 10872 | if (sections->macro.s.section != NULL) |
80626a55 | 10873 | return 0; |
049412e3 | 10874 | sections->macro.s.section = sectp; |
80626a55 DE |
10875 | sections->macro.size = bfd_get_section_size (sectp); |
10876 | } | |
10877 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10878 | { | |
10879 | /* There can be only one. */ | |
049412e3 | 10880 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 10881 | return 0; |
049412e3 | 10882 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
10883 | sections->str_offsets.size = bfd_get_section_size (sectp); |
10884 | } | |
10885 | else | |
10886 | { | |
10887 | /* No other kind of section is valid. */ | |
10888 | return 0; | |
10889 | } | |
10890 | ||
10891 | return 1; | |
10892 | } | |
10893 | ||
73869dc2 DE |
10894 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
10895 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10896 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10897 | This is for DWP version 1 files. */ | |
80626a55 DE |
10898 | |
10899 | static struct dwo_unit * | |
73869dc2 DE |
10900 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
10901 | uint32_t unit_index, | |
10902 | const char *comp_dir, | |
10903 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
10904 | { |
10905 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
10906 | const struct dwp_hash_table *dwp_htab = |
10907 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
10908 | bfd *dbfd = dwp_file->dbfd; |
10909 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10910 | struct dwo_file *dwo_file; | |
10911 | struct dwo_unit *dwo_unit; | |
73869dc2 | 10912 | struct virtual_v1_dwo_sections sections; |
80626a55 | 10913 | void **dwo_file_slot; |
80626a55 DE |
10914 | int i; |
10915 | ||
73869dc2 DE |
10916 | gdb_assert (dwp_file->version == 1); |
10917 | ||
b4f54984 | 10918 | if (dwarf_read_debug) |
80626a55 | 10919 | { |
73869dc2 | 10920 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10921 | kind, |
73869dc2 | 10922 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10923 | dwp_file->name); |
10924 | } | |
10925 | ||
19ac8c2e | 10926 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10927 | Put a limit on the number of sections we look for so that bad data |
10928 | doesn't cause us to loop forever. */ | |
10929 | ||
73869dc2 | 10930 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10931 | (1 /* .debug_info or .debug_types */ \ |
10932 | + 1 /* .debug_abbrev */ \ | |
10933 | + 1 /* .debug_line */ \ | |
10934 | + 1 /* .debug_loc */ \ | |
10935 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10936 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10937 | + 1 /* trailing zero */) |
10938 | ||
10939 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 10940 | |
73869dc2 | 10941 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10942 | { |
10943 | asection *sectp; | |
10944 | uint32_t section_nr = | |
10945 | read_4_bytes (dbfd, | |
73869dc2 DE |
10946 | dwp_htab->section_pool.v1.indices |
10947 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10948 | |
10949 | if (section_nr == 0) | |
10950 | break; | |
10951 | if (section_nr >= dwp_file->num_sections) | |
10952 | { | |
10953 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10954 | " [in module %s]"), | |
10955 | dwp_file->name); | |
10956 | } | |
10957 | ||
10958 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10959 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10960 | { |
10961 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10962 | " [in module %s]"), | |
10963 | dwp_file->name); | |
10964 | } | |
10965 | } | |
10966 | ||
10967 | if (i < 2 | |
a32a8923 DE |
10968 | || dwarf2_section_empty_p (§ions.info_or_types) |
10969 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10970 | { |
10971 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10972 | " [in module %s]"), | |
10973 | dwp_file->name); | |
10974 | } | |
73869dc2 | 10975 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10976 | { |
10977 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10978 | " [in module %s]"), | |
10979 | dwp_file->name); | |
10980 | } | |
10981 | ||
10982 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10983 | have dwo_unit "live" in that. At least for now. | |
10984 | ||
10985 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10986 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10987 | file, we can combine them back into a virtual DWO file to save space |
10988 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10989 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10990 | ||
791afaa2 TT |
10991 | std::string virtual_dwo_name = |
10992 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
10993 | get_section_id (§ions.abbrev), | |
10994 | get_section_id (§ions.line), | |
10995 | get_section_id (§ions.loc), | |
10996 | get_section_id (§ions.str_offsets)); | |
80626a55 | 10997 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 10998 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
80626a55 DE |
10999 | /* Create one if necessary. */ |
11000 | if (*dwo_file_slot == NULL) | |
11001 | { | |
b4f54984 | 11002 | if (dwarf_read_debug) |
80626a55 DE |
11003 | { |
11004 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11005 | virtual_dwo_name.c_str ()); |
80626a55 DE |
11006 | } |
11007 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11008 | dwo_file->dwo_name |
11009 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11010 | virtual_dwo_name.c_str (), |
11011 | virtual_dwo_name.size ()); | |
0ac5b59e | 11012 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11013 | dwo_file->sections.abbrev = sections.abbrev; |
11014 | dwo_file->sections.line = sections.line; | |
11015 | dwo_file->sections.loc = sections.loc; | |
11016 | dwo_file->sections.macinfo = sections.macinfo; | |
11017 | dwo_file->sections.macro = sections.macro; | |
11018 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11019 | /* The "str" section is global to the entire DWP file. */ | |
11020 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11021 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11022 | there's no need to record it in dwo_file. |
11023 | Also, we can't simply record type sections in dwo_file because | |
11024 | we record a pointer into the vector in dwo_unit. As we collect more | |
11025 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11026 | for it, invalidating all copies of pointers into the previous |
11027 | contents. */ | |
80626a55 DE |
11028 | *dwo_file_slot = dwo_file; |
11029 | } | |
11030 | else | |
11031 | { | |
b4f54984 | 11032 | if (dwarf_read_debug) |
80626a55 DE |
11033 | { |
11034 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11035 | virtual_dwo_name.c_str ()); |
80626a55 | 11036 | } |
9a3c8263 | 11037 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11038 | } |
80626a55 DE |
11039 | |
11040 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11041 | dwo_unit->dwo_file = dwo_file; | |
11042 | dwo_unit->signature = signature; | |
8d749320 SM |
11043 | dwo_unit->section = |
11044 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11045 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11046 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11047 | |
11048 | return dwo_unit; | |
11049 | } | |
11050 | ||
73869dc2 DE |
11051 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11052 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11053 | piece within that section used by a TU/CU, return a virtual section | |
11054 | of just that piece. */ | |
11055 | ||
11056 | static struct dwarf2_section_info | |
11057 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
11058 | bfd_size_type offset, bfd_size_type size) | |
11059 | { | |
11060 | struct dwarf2_section_info result; | |
11061 | asection *sectp; | |
11062 | ||
11063 | gdb_assert (section != NULL); | |
11064 | gdb_assert (!section->is_virtual); | |
11065 | ||
11066 | memset (&result, 0, sizeof (result)); | |
11067 | result.s.containing_section = section; | |
11068 | result.is_virtual = 1; | |
11069 | ||
11070 | if (size == 0) | |
11071 | return result; | |
11072 | ||
11073 | sectp = get_section_bfd_section (section); | |
11074 | ||
11075 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11076 | bounds of the real section. This is a pretty-rare event, so just | |
11077 | flag an error (easier) instead of a warning and trying to cope. */ | |
11078 | if (sectp == NULL | |
11079 | || offset + size > bfd_get_section_size (sectp)) | |
11080 | { | |
11081 | bfd *abfd = sectp->owner; | |
11082 | ||
11083 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
11084 | " in section %s [in module %s]"), | |
11085 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
11086 | objfile_name (dwarf2_per_objfile->objfile)); | |
11087 | } | |
11088 | ||
11089 | result.virtual_offset = offset; | |
11090 | result.size = size; | |
11091 | return result; | |
11092 | } | |
11093 | ||
11094 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11095 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11096 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11097 | This is for DWP version 2 files. */ | |
11098 | ||
11099 | static struct dwo_unit * | |
11100 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
11101 | uint32_t unit_index, | |
11102 | const char *comp_dir, | |
11103 | ULONGEST signature, int is_debug_types) | |
11104 | { | |
11105 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11106 | const struct dwp_hash_table *dwp_htab = | |
11107 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11108 | bfd *dbfd = dwp_file->dbfd; | |
11109 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11110 | struct dwo_file *dwo_file; | |
11111 | struct dwo_unit *dwo_unit; | |
11112 | struct virtual_v2_dwo_sections sections; | |
11113 | void **dwo_file_slot; | |
73869dc2 DE |
11114 | int i; |
11115 | ||
11116 | gdb_assert (dwp_file->version == 2); | |
11117 | ||
b4f54984 | 11118 | if (dwarf_read_debug) |
73869dc2 DE |
11119 | { |
11120 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11121 | kind, | |
11122 | pulongest (unit_index), hex_string (signature), | |
11123 | dwp_file->name); | |
11124 | } | |
11125 | ||
11126 | /* Fetch the section offsets of this DWO unit. */ | |
11127 | ||
11128 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11129 | |
11130 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11131 | { | |
11132 | uint32_t offset = read_4_bytes (dbfd, | |
11133 | dwp_htab->section_pool.v2.offsets | |
11134 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11135 | + i) | |
11136 | * sizeof (uint32_t))); | |
11137 | uint32_t size = read_4_bytes (dbfd, | |
11138 | dwp_htab->section_pool.v2.sizes | |
11139 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11140 | + i) | |
11141 | * sizeof (uint32_t))); | |
11142 | ||
11143 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11144 | { | |
11145 | case DW_SECT_INFO: | |
11146 | case DW_SECT_TYPES: | |
11147 | sections.info_or_types_offset = offset; | |
11148 | sections.info_or_types_size = size; | |
11149 | break; | |
11150 | case DW_SECT_ABBREV: | |
11151 | sections.abbrev_offset = offset; | |
11152 | sections.abbrev_size = size; | |
11153 | break; | |
11154 | case DW_SECT_LINE: | |
11155 | sections.line_offset = offset; | |
11156 | sections.line_size = size; | |
11157 | break; | |
11158 | case DW_SECT_LOC: | |
11159 | sections.loc_offset = offset; | |
11160 | sections.loc_size = size; | |
11161 | break; | |
11162 | case DW_SECT_STR_OFFSETS: | |
11163 | sections.str_offsets_offset = offset; | |
11164 | sections.str_offsets_size = size; | |
11165 | break; | |
11166 | case DW_SECT_MACINFO: | |
11167 | sections.macinfo_offset = offset; | |
11168 | sections.macinfo_size = size; | |
11169 | break; | |
11170 | case DW_SECT_MACRO: | |
11171 | sections.macro_offset = offset; | |
11172 | sections.macro_size = size; | |
11173 | break; | |
11174 | } | |
11175 | } | |
11176 | ||
11177 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11178 | have dwo_unit "live" in that. At least for now. | |
11179 | ||
11180 | The DWP file can be made up of a random collection of CUs and TUs. | |
11181 | However, for each CU + set of TUs that came from the same original DWO | |
11182 | file, we can combine them back into a virtual DWO file to save space | |
11183 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11184 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11185 | ||
791afaa2 TT |
11186 | std::string virtual_dwo_name = |
11187 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11188 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11189 | (long) (sections.line_size ? sections.line_offset : 0), | |
11190 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11191 | (long) (sections.str_offsets_size | |
11192 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11193 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11194 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
73869dc2 DE |
11195 | /* Create one if necessary. */ |
11196 | if (*dwo_file_slot == NULL) | |
11197 | { | |
b4f54984 | 11198 | if (dwarf_read_debug) |
73869dc2 DE |
11199 | { |
11200 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11201 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
11202 | } |
11203 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11204 | dwo_file->dwo_name |
11205 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11206 | virtual_dwo_name.c_str (), |
11207 | virtual_dwo_name.size ()); | |
73869dc2 DE |
11208 | dwo_file->comp_dir = comp_dir; |
11209 | dwo_file->sections.abbrev = | |
11210 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
11211 | sections.abbrev_offset, sections.abbrev_size); | |
11212 | dwo_file->sections.line = | |
11213 | create_dwp_v2_section (&dwp_file->sections.line, | |
11214 | sections.line_offset, sections.line_size); | |
11215 | dwo_file->sections.loc = | |
11216 | create_dwp_v2_section (&dwp_file->sections.loc, | |
11217 | sections.loc_offset, sections.loc_size); | |
11218 | dwo_file->sections.macinfo = | |
11219 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
11220 | sections.macinfo_offset, sections.macinfo_size); | |
11221 | dwo_file->sections.macro = | |
11222 | create_dwp_v2_section (&dwp_file->sections.macro, | |
11223 | sections.macro_offset, sections.macro_size); | |
11224 | dwo_file->sections.str_offsets = | |
11225 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
11226 | sections.str_offsets_offset, | |
11227 | sections.str_offsets_size); | |
11228 | /* The "str" section is global to the entire DWP file. */ | |
11229 | dwo_file->sections.str = dwp_file->sections.str; | |
11230 | /* The info or types section is assigned below to dwo_unit, | |
11231 | there's no need to record it in dwo_file. | |
11232 | Also, we can't simply record type sections in dwo_file because | |
11233 | we record a pointer into the vector in dwo_unit. As we collect more | |
11234 | types we'll grow the vector and eventually have to reallocate space | |
11235 | for it, invalidating all copies of pointers into the previous | |
11236 | contents. */ | |
11237 | *dwo_file_slot = dwo_file; | |
11238 | } | |
11239 | else | |
11240 | { | |
b4f54984 | 11241 | if (dwarf_read_debug) |
73869dc2 DE |
11242 | { |
11243 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11244 | virtual_dwo_name.c_str ()); |
73869dc2 | 11245 | } |
9a3c8263 | 11246 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11247 | } |
73869dc2 DE |
11248 | |
11249 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11250 | dwo_unit->dwo_file = dwo_file; | |
11251 | dwo_unit->signature = signature; | |
8d749320 SM |
11252 | dwo_unit->section = |
11253 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
11254 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
11255 | ? &dwp_file->sections.types | |
11256 | : &dwp_file->sections.info, | |
11257 | sections.info_or_types_offset, | |
11258 | sections.info_or_types_size); | |
11259 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11260 | ||
11261 | return dwo_unit; | |
11262 | } | |
11263 | ||
57d63ce2 DE |
11264 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11265 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11266 | |
11267 | static struct dwo_unit * | |
57d63ce2 DE |
11268 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
11269 | ULONGEST signature, int is_debug_types) | |
80626a55 | 11270 | { |
57d63ce2 DE |
11271 | const struct dwp_hash_table *dwp_htab = |
11272 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 11273 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 11274 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11275 | uint32_t hash = signature & mask; |
11276 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11277 | unsigned int i; | |
11278 | void **slot; | |
870f88f7 | 11279 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11280 | |
11281 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11282 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
11283 | slot = htab_find_slot (is_debug_types |
11284 | ? dwp_file->loaded_tus | |
11285 | : dwp_file->loaded_cus, | |
11286 | &find_dwo_cu, INSERT); | |
80626a55 DE |
11287 | |
11288 | if (*slot != NULL) | |
9a3c8263 | 11289 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11290 | |
11291 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11292 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11293 | { |
11294 | ULONGEST signature_in_table; | |
11295 | ||
11296 | signature_in_table = | |
57d63ce2 | 11297 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11298 | if (signature_in_table == signature) |
11299 | { | |
57d63ce2 DE |
11300 | uint32_t unit_index = |
11301 | read_4_bytes (dbfd, | |
11302 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11303 | |
73869dc2 DE |
11304 | if (dwp_file->version == 1) |
11305 | { | |
11306 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
11307 | comp_dir, signature, | |
11308 | is_debug_types); | |
11309 | } | |
11310 | else | |
11311 | { | |
11312 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
11313 | comp_dir, signature, | |
11314 | is_debug_types); | |
11315 | } | |
9a3c8263 | 11316 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11317 | } |
11318 | if (signature_in_table == 0) | |
11319 | return NULL; | |
11320 | hash = (hash + hash2) & mask; | |
11321 | } | |
11322 | ||
11323 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11324 | " [in module %s]"), | |
11325 | dwp_file->name); | |
11326 | } | |
11327 | ||
ab5088bf | 11328 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11329 | Open the file specified by FILE_NAME and hand it off to BFD for |
11330 | preliminary analysis. Return a newly initialized bfd *, which | |
11331 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 11332 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
11333 | SEARCH_CWD is true if the current directory is to be searched. |
11334 | It will be searched before debug-file-directory. | |
13aaf454 DE |
11335 | If successful, the file is added to the bfd include table of the |
11336 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 11337 | If unable to find/open the file, return NULL. |
3019eac3 DE |
11338 | NOTE: This function is derived from symfile_bfd_open. */ |
11339 | ||
192b62ce | 11340 | static gdb_bfd_ref_ptr |
6ac97d4c | 11341 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 11342 | { |
80626a55 | 11343 | int desc, flags; |
3019eac3 | 11344 | char *absolute_name; |
9c02c129 DE |
11345 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
11346 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
11347 | to debug_file_directory. */ | |
11348 | char *search_path; | |
11349 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
11350 | ||
6ac97d4c DE |
11351 | if (search_cwd) |
11352 | { | |
11353 | if (*debug_file_directory != '\0') | |
11354 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 11355 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
11356 | else |
11357 | search_path = xstrdup ("."); | |
11358 | } | |
9c02c129 | 11359 | else |
6ac97d4c | 11360 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 11361 | |
492c0ab7 | 11362 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
11363 | if (is_dwp) |
11364 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 11365 | desc = openp (search_path, flags, file_name, |
3019eac3 | 11366 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 11367 | xfree (search_path); |
3019eac3 DE |
11368 | if (desc < 0) |
11369 | return NULL; | |
11370 | ||
192b62ce | 11371 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 11372 | xfree (absolute_name); |
9c02c129 DE |
11373 | if (sym_bfd == NULL) |
11374 | return NULL; | |
192b62ce | 11375 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 11376 | |
192b62ce TT |
11377 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
11378 | return NULL; | |
3019eac3 | 11379 | |
13aaf454 DE |
11380 | /* Success. Record the bfd as having been included by the objfile's bfd. |
11381 | This is important because things like demangled_names_hash lives in the | |
11382 | objfile's per_bfd space and may have references to things like symbol | |
11383 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 11384 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 11385 | |
3019eac3 DE |
11386 | return sym_bfd; |
11387 | } | |
11388 | ||
ab5088bf | 11389 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
11390 | COMP_DIR is the DW_AT_comp_dir attribute. |
11391 | The result is the bfd handle of the file. | |
11392 | If there is a problem finding or opening the file, return NULL. | |
11393 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11394 | same as symfile_bfd_open. */ | |
11395 | ||
192b62ce | 11396 | static gdb_bfd_ref_ptr |
ab5088bf | 11397 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 11398 | { |
80626a55 | 11399 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 11400 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
11401 | |
11402 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
11403 | ||
11404 | if (comp_dir != NULL) | |
11405 | { | |
b36cec19 PA |
11406 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
11407 | file_name, (char *) NULL); | |
3019eac3 DE |
11408 | |
11409 | /* NOTE: If comp_dir is a relative path, this will also try the | |
11410 | search path, which seems useful. */ | |
192b62ce TT |
11411 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
11412 | 1 /*search_cwd*/)); | |
3019eac3 DE |
11413 | xfree (path_to_try); |
11414 | if (abfd != NULL) | |
11415 | return abfd; | |
11416 | } | |
11417 | ||
11418 | /* That didn't work, try debug-file-directory, which, despite its name, | |
11419 | is a list of paths. */ | |
11420 | ||
11421 | if (*debug_file_directory == '\0') | |
11422 | return NULL; | |
11423 | ||
6ac97d4c | 11424 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
11425 | } |
11426 | ||
80626a55 DE |
11427 | /* This function is mapped across the sections and remembers the offset and |
11428 | size of each of the DWO debugging sections we are interested in. */ | |
11429 | ||
11430 | static void | |
11431 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
11432 | { | |
9a3c8263 | 11433 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
11434 | const struct dwop_section_names *names = &dwop_section_names; |
11435 | ||
11436 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11437 | { | |
049412e3 | 11438 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
11439 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
11440 | } | |
11441 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11442 | { | |
049412e3 | 11443 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
11444 | dwo_sections->info.size = bfd_get_section_size (sectp); |
11445 | } | |
11446 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11447 | { | |
049412e3 | 11448 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
11449 | dwo_sections->line.size = bfd_get_section_size (sectp); |
11450 | } | |
11451 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11452 | { | |
049412e3 | 11453 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
11454 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
11455 | } | |
11456 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11457 | { | |
049412e3 | 11458 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
11459 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
11460 | } | |
11461 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11462 | { | |
049412e3 | 11463 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
11464 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
11465 | } | |
11466 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
11467 | { | |
049412e3 | 11468 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
11469 | dwo_sections->str.size = bfd_get_section_size (sectp); |
11470 | } | |
11471 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11472 | { | |
049412e3 | 11473 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
11474 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
11475 | } | |
11476 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11477 | { | |
11478 | struct dwarf2_section_info type_section; | |
11479 | ||
11480 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 11481 | type_section.s.section = sectp; |
80626a55 DE |
11482 | type_section.size = bfd_get_section_size (sectp); |
11483 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
11484 | &type_section); | |
11485 | } | |
11486 | } | |
11487 | ||
ab5088bf | 11488 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 11489 | by PER_CU. This is for the non-DWP case. |
80626a55 | 11490 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
11491 | |
11492 | static struct dwo_file * | |
0ac5b59e DE |
11493 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
11494 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
11495 | { |
11496 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 11497 | struct dwo_file *dwo_file; |
3019eac3 DE |
11498 | struct cleanup *cleanups; |
11499 | ||
192b62ce | 11500 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
11501 | if (dbfd == NULL) |
11502 | { | |
b4f54984 | 11503 | if (dwarf_read_debug) |
80626a55 DE |
11504 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
11505 | return NULL; | |
11506 | } | |
11507 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
11508 | dwo_file->dwo_name = dwo_name; |
11509 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 11510 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
11511 | |
11512 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
11513 | ||
192b62ce TT |
11514 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
11515 | &dwo_file->sections); | |
3019eac3 | 11516 | |
33c5cd75 | 11517 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 11518 | |
78d4d2c5 JK |
11519 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
11520 | dwo_file->tus); | |
3019eac3 DE |
11521 | |
11522 | discard_cleanups (cleanups); | |
11523 | ||
b4f54984 | 11524 | if (dwarf_read_debug) |
80626a55 DE |
11525 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
11526 | ||
3019eac3 DE |
11527 | return dwo_file; |
11528 | } | |
11529 | ||
80626a55 | 11530 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
11531 | size of each of the DWP debugging sections common to version 1 and 2 that |
11532 | we are interested in. */ | |
3019eac3 | 11533 | |
80626a55 | 11534 | static void |
73869dc2 DE |
11535 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
11536 | void *dwp_file_ptr) | |
3019eac3 | 11537 | { |
9a3c8263 | 11538 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
11539 | const struct dwop_section_names *names = &dwop_section_names; |
11540 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 11541 | |
80626a55 | 11542 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 11543 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
11544 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
11545 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 11546 | |
80626a55 DE |
11547 | /* Look for specific sections that we need. */ |
11548 | if (section_is_p (sectp->name, &names->str_dwo)) | |
11549 | { | |
049412e3 | 11550 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
11551 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
11552 | } | |
11553 | else if (section_is_p (sectp->name, &names->cu_index)) | |
11554 | { | |
049412e3 | 11555 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
11556 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
11557 | } | |
11558 | else if (section_is_p (sectp->name, &names->tu_index)) | |
11559 | { | |
049412e3 | 11560 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
11561 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
11562 | } | |
11563 | } | |
3019eac3 | 11564 | |
73869dc2 DE |
11565 | /* This function is mapped across the sections and remembers the offset and |
11566 | size of each of the DWP version 2 debugging sections that we are interested | |
11567 | in. This is split into a separate function because we don't know if we | |
11568 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
11569 | ||
11570 | static void | |
11571 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
11572 | { | |
9a3c8263 | 11573 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
11574 | const struct dwop_section_names *names = &dwop_section_names; |
11575 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
11576 | ||
11577 | /* Record the ELF section number for later lookup: this is what the | |
11578 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
11579 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
11580 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
11581 | ||
11582 | /* Look for specific sections that we need. */ | |
11583 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11584 | { | |
049412e3 | 11585 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
11586 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
11587 | } | |
11588 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11589 | { | |
049412e3 | 11590 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
11591 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
11592 | } | |
11593 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11594 | { | |
049412e3 | 11595 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11596 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11597 | } | |
11598 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11599 | { | |
049412e3 | 11600 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11601 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11602 | } | |
11603 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11604 | { | |
049412e3 | 11605 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11606 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11607 | } | |
11608 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11609 | { | |
049412e3 | 11610 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11611 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11612 | } | |
11613 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11614 | { | |
049412e3 | 11615 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11616 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11617 | } | |
11618 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11619 | { | |
049412e3 | 11620 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11621 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11622 | } | |
11623 | } | |
11624 | ||
80626a55 | 11625 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11626 | |
80626a55 DE |
11627 | static hashval_t |
11628 | hash_dwp_loaded_cutus (const void *item) | |
11629 | { | |
9a3c8263 | 11630 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11631 | |
80626a55 DE |
11632 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11633 | return dwo_unit->signature; | |
3019eac3 DE |
11634 | } |
11635 | ||
80626a55 | 11636 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11637 | |
80626a55 DE |
11638 | static int |
11639 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11640 | { |
9a3c8263 SM |
11641 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11642 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11643 | |
80626a55 DE |
11644 | return dua->signature == dub->signature; |
11645 | } | |
3019eac3 | 11646 | |
80626a55 | 11647 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11648 | |
80626a55 DE |
11649 | static htab_t |
11650 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11651 | { | |
11652 | return htab_create_alloc_ex (3, | |
11653 | hash_dwp_loaded_cutus, | |
11654 | eq_dwp_loaded_cutus, | |
11655 | NULL, | |
11656 | &objfile->objfile_obstack, | |
11657 | hashtab_obstack_allocate, | |
11658 | dummy_obstack_deallocate); | |
11659 | } | |
3019eac3 | 11660 | |
ab5088bf DE |
11661 | /* Try to open DWP file FILE_NAME. |
11662 | The result is the bfd handle of the file. | |
11663 | If there is a problem finding or opening the file, return NULL. | |
11664 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11665 | same as symfile_bfd_open. */ | |
11666 | ||
192b62ce | 11667 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11668 | open_dwp_file (const char *file_name) |
11669 | { | |
192b62ce TT |
11670 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11671 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11672 | if (abfd != NULL) |
11673 | return abfd; | |
11674 | ||
11675 | /* Work around upstream bug 15652. | |
11676 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11677 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11678 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11679 | of the executable's path may have discarded the needed info. | |
11680 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11681 | .gnu_debuglink, but that doesn't exist yet.] | |
11682 | Strip the directory from FILE_NAME and search again. */ | |
11683 | if (*debug_file_directory != '\0') | |
11684 | { | |
11685 | /* Don't implicitly search the current directory here. | |
11686 | If the user wants to search "." to handle this case, | |
11687 | it must be added to debug-file-directory. */ | |
11688 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11689 | 0 /*search_cwd*/); | |
11690 | } | |
11691 | ||
11692 | return NULL; | |
ab5088bf DE |
11693 | } |
11694 | ||
80626a55 DE |
11695 | /* Initialize the use of the DWP file for the current objfile. |
11696 | By convention the name of the DWP file is ${objfile}.dwp. | |
11697 | The result is NULL if it can't be found. */ | |
a766d390 | 11698 | |
80626a55 | 11699 | static struct dwp_file * |
ab5088bf | 11700 | open_and_init_dwp_file (void) |
80626a55 DE |
11701 | { |
11702 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11703 | struct dwp_file *dwp_file; | |
80626a55 | 11704 | |
82bf32bc JK |
11705 | /* Try to find first .dwp for the binary file before any symbolic links |
11706 | resolving. */ | |
6c447423 DE |
11707 | |
11708 | /* If the objfile is a debug file, find the name of the real binary | |
11709 | file and get the name of dwp file from there. */ | |
d721ba37 | 11710 | std::string dwp_name; |
6c447423 DE |
11711 | if (objfile->separate_debug_objfile_backlink != NULL) |
11712 | { | |
11713 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11714 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11715 | |
d721ba37 | 11716 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11717 | } |
11718 | else | |
d721ba37 PA |
11719 | dwp_name = objfile->original_name; |
11720 | ||
11721 | dwp_name += ".dwp"; | |
80626a55 | 11722 | |
d721ba37 | 11723 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
11724 | if (dbfd == NULL |
11725 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
11726 | { | |
11727 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
11728 | dwp_name = objfile_name (objfile); |
11729 | dwp_name += ".dwp"; | |
11730 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
11731 | } |
11732 | ||
80626a55 DE |
11733 | if (dbfd == NULL) |
11734 | { | |
b4f54984 | 11735 | if (dwarf_read_debug) |
d721ba37 | 11736 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 11737 | return NULL; |
3019eac3 | 11738 | } |
80626a55 | 11739 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
11740 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
11741 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 11742 | |
80626a55 | 11743 | /* +1: section 0 is unused */ |
192b62ce | 11744 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
11745 | dwp_file->elf_sections = |
11746 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
11747 | dwp_file->num_sections, asection *); | |
11748 | ||
192b62ce TT |
11749 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
11750 | dwp_file); | |
80626a55 DE |
11751 | |
11752 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
11753 | ||
11754 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
11755 | ||
73869dc2 | 11756 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
11757 | if (dwp_file->cus && dwp_file->tus |
11758 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
11759 | { |
11760 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 11761 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 11762 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
11763 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
11764 | " TU version %s [in DWP file %s]"), | |
11765 | pulongest (dwp_file->cus->version), | |
d721ba37 | 11766 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 11767 | } |
08302ed2 DE |
11768 | |
11769 | if (dwp_file->cus) | |
11770 | dwp_file->version = dwp_file->cus->version; | |
11771 | else if (dwp_file->tus) | |
11772 | dwp_file->version = dwp_file->tus->version; | |
11773 | else | |
11774 | dwp_file->version = 2; | |
73869dc2 DE |
11775 | |
11776 | if (dwp_file->version == 2) | |
192b62ce TT |
11777 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
11778 | dwp_file); | |
73869dc2 | 11779 | |
19ac8c2e DE |
11780 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
11781 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 11782 | |
b4f54984 | 11783 | if (dwarf_read_debug) |
80626a55 DE |
11784 | { |
11785 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
11786 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
11787 | " %s CUs, %s TUs\n", |
11788 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
11789 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
11790 | } |
11791 | ||
11792 | return dwp_file; | |
3019eac3 | 11793 | } |
c906108c | 11794 | |
ab5088bf DE |
11795 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
11796 | ||
11797 | static struct dwp_file * | |
11798 | get_dwp_file (void) | |
11799 | { | |
11800 | if (! dwarf2_per_objfile->dwp_checked) | |
11801 | { | |
11802 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
11803 | dwarf2_per_objfile->dwp_checked = 1; | |
11804 | } | |
11805 | return dwarf2_per_objfile->dwp_file; | |
11806 | } | |
11807 | ||
80626a55 DE |
11808 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
11809 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
11810 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 11811 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
11812 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
11813 | ||
11814 | This is called, for example, when wanting to read a variable with a | |
11815 | complex location. Therefore we don't want to do file i/o for every call. | |
11816 | Therefore we don't want to look for a DWO file on every call. | |
11817 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
11818 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
11819 | for a DWO file. | |
11820 | ||
1c658ad5 | 11821 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 11822 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 11823 | |
3019eac3 | 11824 | static struct dwo_unit * |
80626a55 DE |
11825 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
11826 | const char *dwo_name, const char *comp_dir, | |
11827 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
11828 | { |
11829 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
11830 | const char *kind = is_debug_types ? "TU" : "CU"; |
11831 | void **dwo_file_slot; | |
3019eac3 | 11832 | struct dwo_file *dwo_file; |
80626a55 | 11833 | struct dwp_file *dwp_file; |
cb1df416 | 11834 | |
6a506a2d DE |
11835 | /* First see if there's a DWP file. |
11836 | If we have a DWP file but didn't find the DWO inside it, don't | |
11837 | look for the original DWO file. It makes gdb behave differently | |
11838 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 11839 | |
ab5088bf | 11840 | dwp_file = get_dwp_file (); |
80626a55 | 11841 | if (dwp_file != NULL) |
cf2c3c16 | 11842 | { |
80626a55 DE |
11843 | const struct dwp_hash_table *dwp_htab = |
11844 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11845 | ||
11846 | if (dwp_htab != NULL) | |
11847 | { | |
11848 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
11849 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
11850 | signature, is_debug_types); | |
80626a55 DE |
11851 | |
11852 | if (dwo_cutu != NULL) | |
11853 | { | |
b4f54984 | 11854 | if (dwarf_read_debug) |
80626a55 DE |
11855 | { |
11856 | fprintf_unfiltered (gdb_stdlog, | |
11857 | "Virtual DWO %s %s found: @%s\n", | |
11858 | kind, hex_string (signature), | |
11859 | host_address_to_string (dwo_cutu)); | |
11860 | } | |
11861 | return dwo_cutu; | |
11862 | } | |
11863 | } | |
11864 | } | |
6a506a2d | 11865 | else |
80626a55 | 11866 | { |
6a506a2d | 11867 | /* No DWP file, look for the DWO file. */ |
80626a55 | 11868 | |
6a506a2d DE |
11869 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
11870 | if (*dwo_file_slot == NULL) | |
80626a55 | 11871 | { |
6a506a2d DE |
11872 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
11873 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 11874 | } |
6a506a2d | 11875 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 11876 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 11877 | |
6a506a2d | 11878 | if (dwo_file != NULL) |
19c3d4c9 | 11879 | { |
6a506a2d DE |
11880 | struct dwo_unit *dwo_cutu = NULL; |
11881 | ||
11882 | if (is_debug_types && dwo_file->tus) | |
11883 | { | |
11884 | struct dwo_unit find_dwo_cutu; | |
11885 | ||
11886 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11887 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11888 | dwo_cutu |
11889 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 11890 | } |
33c5cd75 | 11891 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 11892 | { |
33c5cd75 DB |
11893 | struct dwo_unit find_dwo_cutu; |
11894 | ||
11895 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11896 | find_dwo_cutu.signature = signature; | |
11897 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
11898 | &find_dwo_cutu); | |
6a506a2d DE |
11899 | } |
11900 | ||
11901 | if (dwo_cutu != NULL) | |
11902 | { | |
b4f54984 | 11903 | if (dwarf_read_debug) |
6a506a2d DE |
11904 | { |
11905 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11906 | kind, dwo_name, hex_string (signature), | |
11907 | host_address_to_string (dwo_cutu)); | |
11908 | } | |
11909 | return dwo_cutu; | |
80626a55 DE |
11910 | } |
11911 | } | |
2e276125 | 11912 | } |
9cdd5dbd | 11913 | |
80626a55 DE |
11914 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11915 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11916 | correctly to find the file. */ | |
11917 | ||
b4f54984 | 11918 | if (dwarf_read_debug) |
80626a55 DE |
11919 | { |
11920 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11921 | kind, dwo_name, hex_string (signature)); | |
11922 | } | |
3019eac3 | 11923 | |
6656a72d DE |
11924 | /* This is a warning and not a complaint because it can be caused by |
11925 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11926 | { |
11927 | /* Print the name of the DWP file if we looked there, helps the user | |
11928 | better diagnose the problem. */ | |
791afaa2 | 11929 | std::string dwp_text; |
43942612 DE |
11930 | |
11931 | if (dwp_file != NULL) | |
791afaa2 TT |
11932 | dwp_text = string_printf (" [in DWP file %s]", |
11933 | lbasename (dwp_file->name)); | |
43942612 DE |
11934 | |
11935 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11936 | " [in module %s]"), | |
11937 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 11938 | dwp_text.c_str (), |
43942612 | 11939 | this_unit->is_debug_types ? "TU" : "CU", |
9c541725 | 11940 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 11941 | } |
3019eac3 | 11942 | return NULL; |
5fb290d7 DJ |
11943 | } |
11944 | ||
80626a55 DE |
11945 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11946 | See lookup_dwo_cutu_unit for details. */ | |
11947 | ||
11948 | static struct dwo_unit * | |
11949 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11950 | const char *dwo_name, const char *comp_dir, | |
11951 | ULONGEST signature) | |
11952 | { | |
11953 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11954 | } | |
11955 | ||
11956 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11957 | See lookup_dwo_cutu_unit for details. */ | |
11958 | ||
11959 | static struct dwo_unit * | |
11960 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11961 | const char *dwo_name, const char *comp_dir) | |
11962 | { | |
11963 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11964 | } | |
11965 | ||
89e63ee4 DE |
11966 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11967 | ||
11968 | static int | |
11969 | queue_and_load_dwo_tu (void **slot, void *info) | |
11970 | { | |
11971 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11972 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11973 | ULONGEST signature = dwo_unit->signature; | |
11974 | struct signatured_type *sig_type = | |
11975 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11976 | ||
11977 | if (sig_type != NULL) | |
11978 | { | |
11979 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11980 | ||
11981 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11982 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11983 | while processing PER_CU. */ | |
11984 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11985 | load_full_type_unit (sig_cu); | |
11986 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11987 | } | |
11988 | ||
11989 | return 1; | |
11990 | } | |
11991 | ||
11992 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11993 | The DWO may have the only definition of the type, though it may not be | |
11994 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11995 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11996 | ||
11997 | static void | |
11998 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11999 | { | |
12000 | struct dwo_unit *dwo_unit; | |
12001 | struct dwo_file *dwo_file; | |
12002 | ||
12003 | gdb_assert (!per_cu->is_debug_types); | |
12004 | gdb_assert (get_dwp_file () == NULL); | |
12005 | gdb_assert (per_cu->cu != NULL); | |
12006 | ||
12007 | dwo_unit = per_cu->cu->dwo_unit; | |
12008 | gdb_assert (dwo_unit != NULL); | |
12009 | ||
12010 | dwo_file = dwo_unit->dwo_file; | |
12011 | if (dwo_file->tus != NULL) | |
12012 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
12013 | } | |
12014 | ||
3019eac3 DE |
12015 | /* Free all resources associated with DWO_FILE. |
12016 | Close the DWO file and munmap the sections. | |
12017 | All memory should be on the objfile obstack. */ | |
348e048f DE |
12018 | |
12019 | static void | |
3019eac3 | 12020 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 12021 | { |
348e048f | 12022 | |
5c6fa7ab | 12023 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 12024 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 12025 | |
3019eac3 DE |
12026 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
12027 | } | |
348e048f | 12028 | |
3019eac3 | 12029 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 12030 | |
3019eac3 DE |
12031 | static void |
12032 | free_dwo_file_cleanup (void *arg) | |
12033 | { | |
12034 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
12035 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 12036 | |
3019eac3 DE |
12037 | free_dwo_file (dwo_file, objfile); |
12038 | } | |
348e048f | 12039 | |
3019eac3 | 12040 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 12041 | |
3019eac3 DE |
12042 | static int |
12043 | free_dwo_file_from_slot (void **slot, void *info) | |
12044 | { | |
12045 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
12046 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 12047 | |
3019eac3 | 12048 | free_dwo_file (dwo_file, objfile); |
348e048f | 12049 | |
3019eac3 DE |
12050 | return 1; |
12051 | } | |
348e048f | 12052 | |
3019eac3 | 12053 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 12054 | |
3019eac3 DE |
12055 | static void |
12056 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
12057 | { | |
12058 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 12059 | } |
3019eac3 DE |
12060 | \f |
12061 | /* Read in various DIEs. */ | |
348e048f | 12062 | |
d389af10 | 12063 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12064 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12065 | already referenced by DW_AT_abstract_origin from the children of the | |
12066 | current DIE. */ | |
d389af10 JK |
12067 | |
12068 | static void | |
12069 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12070 | { | |
12071 | struct die_info *child_die; | |
791afaa2 | 12072 | sect_offset *offsetp; |
d389af10 JK |
12073 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12074 | struct die_info *origin_die; | |
12075 | /* Iterator of the ORIGIN_DIE children. */ | |
12076 | struct die_info *origin_child_die; | |
d389af10 | 12077 | struct attribute *attr; |
cd02d79d PA |
12078 | struct dwarf2_cu *origin_cu; |
12079 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12080 | |
12081 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12082 | if (!attr) | |
12083 | return; | |
12084 | ||
cd02d79d PA |
12085 | /* Note that following die references may follow to a die in a |
12086 | different cu. */ | |
12087 | ||
12088 | origin_cu = cu; | |
12089 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12090 | ||
12091 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12092 | symbols in. */ | |
12093 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12094 | origin_cu->list_in_scope = cu->list_in_scope; | |
12095 | ||
edb3359d DJ |
12096 | if (die->tag != origin_die->tag |
12097 | && !(die->tag == DW_TAG_inlined_subroutine | |
12098 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12099 | complaint (&symfile_complaints, |
12100 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
12101 | to_underlying (die->sect_off), |
12102 | to_underlying (origin_die->sect_off)); | |
d389af10 | 12103 | |
791afaa2 | 12104 | std::vector<sect_offset> offsets; |
d389af10 | 12105 | |
3ea89b92 PMR |
12106 | for (child_die = die->child; |
12107 | child_die && child_die->tag; | |
12108 | child_die = sibling_die (child_die)) | |
12109 | { | |
12110 | struct die_info *child_origin_die; | |
12111 | struct dwarf2_cu *child_origin_cu; | |
12112 | ||
12113 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12114 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12115 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12116 | present in the abstract instance but not referenced in the concrete | |
12117 | one. */ | |
216f72a1 JK |
12118 | if (child_die->tag == DW_TAG_call_site |
12119 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12120 | continue; |
12121 | ||
c38f313d DJ |
12122 | /* For each CHILD_DIE, find the corresponding child of |
12123 | ORIGIN_DIE. If there is more than one layer of | |
12124 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12125 | but GCC versions at least through 4.4 generate this (GCC PR | |
12126 | 40573). */ | |
3ea89b92 PMR |
12127 | child_origin_die = child_die; |
12128 | child_origin_cu = cu; | |
c38f313d DJ |
12129 | while (1) |
12130 | { | |
cd02d79d PA |
12131 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12132 | child_origin_cu); | |
c38f313d DJ |
12133 | if (attr == NULL) |
12134 | break; | |
cd02d79d PA |
12135 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12136 | &child_origin_cu); | |
c38f313d DJ |
12137 | } |
12138 | ||
d389af10 JK |
12139 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12140 | counterpart may exist. */ | |
c38f313d | 12141 | if (child_origin_die != child_die) |
d389af10 | 12142 | { |
edb3359d DJ |
12143 | if (child_die->tag != child_origin_die->tag |
12144 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12145 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12146 | complaint (&symfile_complaints, |
12147 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12148 | "different tags"), |
12149 | to_underlying (child_die->sect_off), | |
12150 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
12151 | if (child_origin_die->parent != origin_die) |
12152 | complaint (&symfile_complaints, | |
12153 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12154 | "different parents"), |
12155 | to_underlying (child_die->sect_off), | |
12156 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 12157 | else |
791afaa2 | 12158 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12159 | } |
d389af10 | 12160 | } |
791afaa2 TT |
12161 | std::sort (offsets.begin (), offsets.end ()); |
12162 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12163 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12164 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
12165 | complaint (&symfile_complaints, |
12166 | _("Multiple children of DIE 0x%x refer " | |
12167 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 12168 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 | 12169 | |
791afaa2 | 12170 | offsetp = offsets.data (); |
d389af10 JK |
12171 | origin_child_die = origin_die->child; |
12172 | while (origin_child_die && origin_child_die->tag) | |
12173 | { | |
12174 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12175 | while (offsetp < offsets_end |
9c541725 | 12176 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12177 | offsetp++; |
b64f50a1 | 12178 | if (offsetp >= offsets_end |
9c541725 | 12179 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12180 | { |
adde2bff DE |
12181 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12182 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12183 | This can happen with mutually referenced abstract_origins. | |
12184 | PR 16581. */ | |
12185 | if (!origin_child_die->in_process) | |
12186 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12187 | } |
12188 | origin_child_die = sibling_die (origin_child_die); | |
12189 | } | |
cd02d79d | 12190 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
12191 | } |
12192 | ||
c906108c | 12193 | static void |
e7c27a73 | 12194 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12195 | { |
e7c27a73 | 12196 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12197 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12198 | struct context_stack *newobj; |
c906108c SS |
12199 | CORE_ADDR lowpc; |
12200 | CORE_ADDR highpc; | |
12201 | struct die_info *child_die; | |
edb3359d | 12202 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12203 | const char *name; |
e142c38c | 12204 | CORE_ADDR baseaddr; |
801e3a5b | 12205 | struct block *block; |
edb3359d | 12206 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
12207 | VEC (symbolp) *template_args = NULL; |
12208 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
12209 | |
12210 | if (inlined_func) | |
12211 | { | |
12212 | /* If we do not have call site information, we can't show the | |
12213 | caller of this inlined function. That's too confusing, so | |
12214 | only use the scope for local variables. */ | |
12215 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12216 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12217 | if (call_line == NULL || call_file == NULL) | |
12218 | { | |
12219 | read_lexical_block_scope (die, cu); | |
12220 | return; | |
12221 | } | |
12222 | } | |
c906108c | 12223 | |
e142c38c DJ |
12224 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
12225 | ||
94af9270 | 12226 | name = dwarf2_name (die, cu); |
c906108c | 12227 | |
e8d05480 JB |
12228 | /* Ignore functions with missing or empty names. These are actually |
12229 | illegal according to the DWARF standard. */ | |
12230 | if (name == NULL) | |
12231 | { | |
12232 | complaint (&symfile_complaints, | |
b64f50a1 | 12233 | _("missing name for subprogram DIE at %d"), |
9c541725 | 12234 | to_underlying (die->sect_off)); |
e8d05480 JB |
12235 | return; |
12236 | } | |
12237 | ||
12238 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12239 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12240 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12241 | { |
ae4d0c03 PM |
12242 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12243 | if (!attr || !DW_UNSND (attr)) | |
12244 | complaint (&symfile_complaints, | |
3e43a32a MS |
12245 | _("cannot get low and high bounds " |
12246 | "for subprogram DIE at %d"), | |
9c541725 | 12247 | to_underlying (die->sect_off)); |
e8d05480 JB |
12248 | return; |
12249 | } | |
c906108c | 12250 | |
3e29f34a MR |
12251 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12252 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12253 | |
34eaf542 TT |
12254 | /* If we have any template arguments, then we must allocate a |
12255 | different sort of symbol. */ | |
12256 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12257 | { | |
12258 | if (child_die->tag == DW_TAG_template_type_param | |
12259 | || child_die->tag == DW_TAG_template_value_param) | |
12260 | { | |
e623cf5d | 12261 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
12262 | templ_func->base.is_cplus_template_function = 1; |
12263 | break; | |
12264 | } | |
12265 | } | |
12266 | ||
fe978cb0 PA |
12267 | newobj = push_context (0, lowpc); |
12268 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 12269 | (struct symbol *) templ_func); |
4c2df51b | 12270 | |
4cecd739 DJ |
12271 | /* If there is a location expression for DW_AT_frame_base, record |
12272 | it. */ | |
e142c38c | 12273 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 12274 | if (attr) |
fe978cb0 | 12275 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12276 | |
63e43d3a PMR |
12277 | /* If there is a location for the static link, record it. */ |
12278 | newobj->static_link = NULL; | |
12279 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
12280 | if (attr) | |
12281 | { | |
224c3ddb SM |
12282 | newobj->static_link |
12283 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
12284 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
12285 | } | |
12286 | ||
e142c38c | 12287 | cu->list_in_scope = &local_symbols; |
c906108c | 12288 | |
639d11d3 | 12289 | if (die->child != NULL) |
c906108c | 12290 | { |
639d11d3 | 12291 | child_die = die->child; |
c906108c SS |
12292 | while (child_die && child_die->tag) |
12293 | { | |
34eaf542 TT |
12294 | if (child_die->tag == DW_TAG_template_type_param |
12295 | || child_die->tag == DW_TAG_template_value_param) | |
12296 | { | |
12297 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12298 | ||
f1078f66 DJ |
12299 | if (arg != NULL) |
12300 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
12301 | } |
12302 | else | |
12303 | process_die (child_die, cu); | |
c906108c SS |
12304 | child_die = sibling_die (child_die); |
12305 | } | |
12306 | } | |
12307 | ||
d389af10 JK |
12308 | inherit_abstract_dies (die, cu); |
12309 | ||
4a811a97 UW |
12310 | /* If we have a DW_AT_specification, we might need to import using |
12311 | directives from the context of the specification DIE. See the | |
12312 | comment in determine_prefix. */ | |
12313 | if (cu->language == language_cplus | |
12314 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12315 | { | |
12316 | struct dwarf2_cu *spec_cu = cu; | |
12317 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12318 | ||
12319 | while (spec_die) | |
12320 | { | |
12321 | child_die = spec_die->child; | |
12322 | while (child_die && child_die->tag) | |
12323 | { | |
12324 | if (child_die->tag == DW_TAG_imported_module) | |
12325 | process_die (child_die, spec_cu); | |
12326 | child_die = sibling_die (child_die); | |
12327 | } | |
12328 | ||
12329 | /* In some cases, GCC generates specification DIEs that | |
12330 | themselves contain DW_AT_specification attributes. */ | |
12331 | spec_die = die_specification (spec_die, &spec_cu); | |
12332 | } | |
12333 | } | |
12334 | ||
fe978cb0 | 12335 | newobj = pop_context (); |
c906108c | 12336 | /* Make a block for the local symbols within. */ |
fe978cb0 | 12337 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 12338 | newobj->static_link, lowpc, highpc); |
801e3a5b | 12339 | |
df8a16a1 | 12340 | /* For C++, set the block's scope. */ |
45280282 IB |
12341 | if ((cu->language == language_cplus |
12342 | || cu->language == language_fortran | |
c44af4eb TT |
12343 | || cu->language == language_d |
12344 | || cu->language == language_rust) | |
4d4ec4e5 | 12345 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12346 | block_set_scope (block, determine_prefix (die, cu), |
12347 | &objfile->objfile_obstack); | |
df8a16a1 | 12348 | |
801e3a5b JB |
12349 | /* If we have address ranges, record them. */ |
12350 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12351 | |
fe978cb0 | 12352 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 12353 | |
34eaf542 TT |
12354 | /* Attach template arguments to function. */ |
12355 | if (! VEC_empty (symbolp, template_args)) | |
12356 | { | |
12357 | gdb_assert (templ_func != NULL); | |
12358 | ||
12359 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
12360 | templ_func->template_arguments | |
8d749320 SM |
12361 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
12362 | templ_func->n_template_arguments); | |
34eaf542 TT |
12363 | memcpy (templ_func->template_arguments, |
12364 | VEC_address (symbolp, template_args), | |
12365 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
12366 | VEC_free (symbolp, template_args); | |
12367 | } | |
12368 | ||
208d8187 JB |
12369 | /* In C++, we can have functions nested inside functions (e.g., when |
12370 | a function declares a class that has methods). This means that | |
12371 | when we finish processing a function scope, we may need to go | |
12372 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 12373 | local_symbols = newobj->locals; |
22cee43f | 12374 | local_using_directives = newobj->local_using_directives; |
208d8187 | 12375 | |
921e78cf JB |
12376 | /* If we've finished processing a top-level function, subsequent |
12377 | symbols go in the file symbol list. */ | |
12378 | if (outermost_context_p ()) | |
e142c38c | 12379 | cu->list_in_scope = &file_symbols; |
c906108c SS |
12380 | } |
12381 | ||
12382 | /* Process all the DIES contained within a lexical block scope. Start | |
12383 | a new scope, process the dies, and then close the scope. */ | |
12384 | ||
12385 | static void | |
e7c27a73 | 12386 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12387 | { |
e7c27a73 | 12388 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12389 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12390 | struct context_stack *newobj; |
c906108c SS |
12391 | CORE_ADDR lowpc, highpc; |
12392 | struct die_info *child_die; | |
e142c38c DJ |
12393 | CORE_ADDR baseaddr; |
12394 | ||
12395 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
12396 | |
12397 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
12398 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
12399 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 12400 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 12401 | describe ranges. */ |
e385593e JK |
12402 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
12403 | { | |
12404 | case PC_BOUNDS_NOT_PRESENT: | |
12405 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
12406 | there was no wrapping by that DW_TAG_lexical_block. | |
12407 | GCC does no longer produces such DWARF since GCC r224161. */ | |
12408 | for (child_die = die->child; | |
12409 | child_die != NULL && child_die->tag; | |
12410 | child_die = sibling_die (child_die)) | |
12411 | process_die (child_die, cu); | |
12412 | return; | |
12413 | case PC_BOUNDS_INVALID: | |
12414 | return; | |
12415 | } | |
3e29f34a MR |
12416 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12417 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
12418 | |
12419 | push_context (0, lowpc); | |
639d11d3 | 12420 | if (die->child != NULL) |
c906108c | 12421 | { |
639d11d3 | 12422 | child_die = die->child; |
c906108c SS |
12423 | while (child_die && child_die->tag) |
12424 | { | |
e7c27a73 | 12425 | process_die (child_die, cu); |
c906108c SS |
12426 | child_die = sibling_die (child_die); |
12427 | } | |
12428 | } | |
3ea89b92 | 12429 | inherit_abstract_dies (die, cu); |
fe978cb0 | 12430 | newobj = pop_context (); |
c906108c | 12431 | |
22cee43f | 12432 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 12433 | { |
801e3a5b | 12434 | struct block *block |
63e43d3a | 12435 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 12436 | newobj->start_addr, highpc); |
801e3a5b JB |
12437 | |
12438 | /* Note that recording ranges after traversing children, as we | |
12439 | do here, means that recording a parent's ranges entails | |
12440 | walking across all its children's ranges as they appear in | |
12441 | the address map, which is quadratic behavior. | |
12442 | ||
12443 | It would be nicer to record the parent's ranges before | |
12444 | traversing its children, simply overriding whatever you find | |
12445 | there. But since we don't even decide whether to create a | |
12446 | block until after we've traversed its children, that's hard | |
12447 | to do. */ | |
12448 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 12449 | } |
fe978cb0 | 12450 | local_symbols = newobj->locals; |
22cee43f | 12451 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
12452 | } |
12453 | ||
216f72a1 | 12454 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
12455 | |
12456 | static void | |
12457 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12458 | { | |
12459 | struct objfile *objfile = cu->objfile; | |
12460 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12461 | CORE_ADDR pc, baseaddr; | |
12462 | struct attribute *attr; | |
12463 | struct call_site *call_site, call_site_local; | |
12464 | void **slot; | |
12465 | int nparams; | |
12466 | struct die_info *child_die; | |
12467 | ||
12468 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12469 | ||
216f72a1 JK |
12470 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
12471 | if (attr == NULL) | |
12472 | { | |
12473 | /* This was a pre-DWARF-5 GNU extension alias | |
12474 | for DW_AT_call_return_pc. */ | |
12475 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
12476 | } | |
96408a79 SA |
12477 | if (!attr) |
12478 | { | |
12479 | complaint (&symfile_complaints, | |
216f72a1 | 12480 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 12481 | "DIE 0x%x [in module %s]"), |
9c541725 | 12482 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12483 | return; |
12484 | } | |
31aa7e4e | 12485 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 12486 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
12487 | |
12488 | if (cu->call_site_htab == NULL) | |
12489 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
12490 | NULL, &objfile->objfile_obstack, | |
12491 | hashtab_obstack_allocate, NULL); | |
12492 | call_site_local.pc = pc; | |
12493 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
12494 | if (*slot != NULL) | |
12495 | { | |
12496 | complaint (&symfile_complaints, | |
216f72a1 | 12497 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 12498 | "DIE 0x%x [in module %s]"), |
9c541725 | 12499 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 12500 | objfile_name (objfile)); |
96408a79 SA |
12501 | return; |
12502 | } | |
12503 | ||
12504 | /* Count parameters at the caller. */ | |
12505 | ||
12506 | nparams = 0; | |
12507 | for (child_die = die->child; child_die && child_die->tag; | |
12508 | child_die = sibling_die (child_die)) | |
12509 | { | |
216f72a1 JK |
12510 | if (child_die->tag != DW_TAG_call_site_parameter |
12511 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12512 | { |
12513 | complaint (&symfile_complaints, | |
216f72a1 JK |
12514 | _("Tag %d is not DW_TAG_call_site_parameter in " |
12515 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 12516 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 12517 | objfile_name (objfile)); |
96408a79 SA |
12518 | continue; |
12519 | } | |
12520 | ||
12521 | nparams++; | |
12522 | } | |
12523 | ||
224c3ddb SM |
12524 | call_site |
12525 | = ((struct call_site *) | |
12526 | obstack_alloc (&objfile->objfile_obstack, | |
12527 | sizeof (*call_site) | |
12528 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
12529 | *slot = call_site; |
12530 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
12531 | call_site->pc = pc; | |
12532 | ||
216f72a1 JK |
12533 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
12534 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
12535 | { |
12536 | struct die_info *func_die; | |
12537 | ||
12538 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
12539 | for (func_die = die->parent; | |
12540 | func_die && func_die->tag != DW_TAG_subprogram | |
12541 | && func_die->tag != DW_TAG_subroutine_type; | |
12542 | func_die = func_die->parent); | |
12543 | ||
216f72a1 JK |
12544 | /* DW_AT_call_all_calls is a superset |
12545 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 12546 | if (func_die |
216f72a1 | 12547 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 12548 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 12549 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
12550 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
12551 | { | |
12552 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
12553 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
12554 | both the initial caller containing the real return address PC and | |
12555 | the final callee containing the current PC of a chain of tail | |
12556 | calls do not need to have the tail call list complete. But any | |
12557 | function candidate for a virtual tail call frame searched via | |
12558 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
12559 | determined unambiguously. */ | |
12560 | } | |
12561 | else | |
12562 | { | |
12563 | struct type *func_type = NULL; | |
12564 | ||
12565 | if (func_die) | |
12566 | func_type = get_die_type (func_die, cu); | |
12567 | if (func_type != NULL) | |
12568 | { | |
12569 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
12570 | ||
12571 | /* Enlist this call site to the function. */ | |
12572 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
12573 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
12574 | } | |
12575 | else | |
12576 | complaint (&symfile_complaints, | |
216f72a1 | 12577 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 12578 | "DIE 0x%x [in module %s]"), |
9c541725 | 12579 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12580 | } |
12581 | } | |
12582 | ||
216f72a1 JK |
12583 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
12584 | if (attr == NULL) | |
12585 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
12586 | if (attr == NULL) | |
12587 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 12588 | if (attr == NULL) |
216f72a1 JK |
12589 | { |
12590 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
12591 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12592 | } | |
96408a79 SA |
12593 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12594 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12595 | /* Keep NULL DWARF_BLOCK. */; | |
12596 | else if (attr_form_is_block (attr)) | |
12597 | { | |
12598 | struct dwarf2_locexpr_baton *dlbaton; | |
12599 | ||
8d749320 | 12600 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12601 | dlbaton->data = DW_BLOCK (attr)->data; |
12602 | dlbaton->size = DW_BLOCK (attr)->size; | |
12603 | dlbaton->per_cu = cu->per_cu; | |
12604 | ||
12605 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12606 | } | |
7771576e | 12607 | else if (attr_form_is_ref (attr)) |
96408a79 | 12608 | { |
96408a79 SA |
12609 | struct dwarf2_cu *target_cu = cu; |
12610 | struct die_info *target_die; | |
12611 | ||
ac9ec31b | 12612 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12613 | gdb_assert (target_cu->objfile == objfile); |
12614 | if (die_is_declaration (target_die, target_cu)) | |
12615 | { | |
7d45c7c3 | 12616 | const char *target_physname; |
9112db09 JK |
12617 | |
12618 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12619 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12620 | if (target_physname == NULL) |
9112db09 | 12621 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12622 | if (target_physname == NULL) |
12623 | complaint (&symfile_complaints, | |
216f72a1 | 12624 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12625 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12626 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12627 | else |
7d455152 | 12628 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12629 | } |
12630 | else | |
12631 | { | |
12632 | CORE_ADDR lowpc; | |
12633 | ||
12634 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12635 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12636 | <= PC_BOUNDS_INVALID) |
96408a79 | 12637 | complaint (&symfile_complaints, |
216f72a1 | 12638 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12639 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12640 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12641 | else |
3e29f34a MR |
12642 | { |
12643 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12644 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12645 | } | |
96408a79 SA |
12646 | } |
12647 | } | |
12648 | else | |
12649 | complaint (&symfile_complaints, | |
216f72a1 | 12650 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12651 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12652 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12653 | |
12654 | call_site->per_cu = cu->per_cu; | |
12655 | ||
12656 | for (child_die = die->child; | |
12657 | child_die && child_die->tag; | |
12658 | child_die = sibling_die (child_die)) | |
12659 | { | |
96408a79 | 12660 | struct call_site_parameter *parameter; |
1788b2d3 | 12661 | struct attribute *loc, *origin; |
96408a79 | 12662 | |
216f72a1 JK |
12663 | if (child_die->tag != DW_TAG_call_site_parameter |
12664 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12665 | { |
12666 | /* Already printed the complaint above. */ | |
12667 | continue; | |
12668 | } | |
12669 | ||
12670 | gdb_assert (call_site->parameter_count < nparams); | |
12671 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12672 | ||
1788b2d3 JK |
12673 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12674 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12675 | register is contained in DW_AT_call_value. */ |
96408a79 | 12676 | |
24c5c679 | 12677 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12678 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12679 | if (origin == NULL) | |
12680 | { | |
12681 | /* This was a pre-DWARF-5 GNU extension alias | |
12682 | for DW_AT_call_parameter. */ | |
12683 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12684 | } | |
7771576e | 12685 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12686 | { |
1788b2d3 | 12687 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12688 | |
12689 | sect_offset sect_off | |
12690 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12691 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12692 | { |
12693 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12694 | binding can be done only inside one CU. Such referenced DIE | |
12695 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12696 | complaint (&symfile_complaints, | |
216f72a1 JK |
12697 | _("DW_AT_call_parameter offset is not in CU for " |
12698 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12699 | to_underlying (child_die->sect_off), |
12700 | objfile_name (objfile)); | |
d76b7dbc JK |
12701 | continue; |
12702 | } | |
9c541725 PA |
12703 | parameter->u.param_cu_off |
12704 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12705 | } |
12706 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12707 | { |
12708 | complaint (&symfile_complaints, | |
12709 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12710 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12711 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12712 | continue; |
12713 | } | |
24c5c679 | 12714 | else |
96408a79 | 12715 | { |
24c5c679 JK |
12716 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12717 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12718 | if (parameter->u.dwarf_reg != -1) | |
12719 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
12720 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
12721 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
12722 | ¶meter->u.fb_offset)) | |
12723 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
12724 | else | |
12725 | { | |
12726 | complaint (&symfile_complaints, | |
12727 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
12728 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 12729 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 12730 | "[in module %s]"), |
9c541725 PA |
12731 | to_underlying (child_die->sect_off), |
12732 | objfile_name (objfile)); | |
24c5c679 JK |
12733 | continue; |
12734 | } | |
96408a79 SA |
12735 | } |
12736 | ||
216f72a1 JK |
12737 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
12738 | if (attr == NULL) | |
12739 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
12740 | if (!attr_form_is_block (attr)) |
12741 | { | |
12742 | complaint (&symfile_complaints, | |
216f72a1 JK |
12743 | _("No DW_FORM_block* DW_AT_call_value for " |
12744 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12745 | to_underlying (child_die->sect_off), |
12746 | objfile_name (objfile)); | |
96408a79 SA |
12747 | continue; |
12748 | } | |
12749 | parameter->value = DW_BLOCK (attr)->data; | |
12750 | parameter->value_size = DW_BLOCK (attr)->size; | |
12751 | ||
12752 | /* Parameters are not pre-cleared by memset above. */ | |
12753 | parameter->data_value = NULL; | |
12754 | parameter->data_value_size = 0; | |
12755 | call_site->parameter_count++; | |
12756 | ||
216f72a1 JK |
12757 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
12758 | if (attr == NULL) | |
12759 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
12760 | if (attr) |
12761 | { | |
12762 | if (!attr_form_is_block (attr)) | |
12763 | complaint (&symfile_complaints, | |
216f72a1 JK |
12764 | _("No DW_FORM_block* DW_AT_call_data_value for " |
12765 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12766 | to_underlying (child_die->sect_off), |
12767 | objfile_name (objfile)); | |
96408a79 SA |
12768 | else |
12769 | { | |
12770 | parameter->data_value = DW_BLOCK (attr)->data; | |
12771 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
12772 | } | |
12773 | } | |
12774 | } | |
12775 | } | |
12776 | ||
43988095 JK |
12777 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
12778 | reading .debug_rnglists. | |
12779 | Callback's type should be: | |
12780 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12781 | Return true if the attributes are present and valid, otherwise, | |
12782 | return false. */ | |
12783 | ||
12784 | template <typename Callback> | |
12785 | static bool | |
12786 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
12787 | Callback &&callback) | |
12788 | { | |
12789 | struct objfile *objfile = cu->objfile; | |
12790 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12791 | struct comp_unit_head *cu_header = &cu->header; | |
12792 | bfd *obfd = objfile->obfd; | |
12793 | unsigned int addr_size = cu_header->addr_size; | |
12794 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12795 | /* Base address selection entry. */ | |
12796 | CORE_ADDR base; | |
12797 | int found_base; | |
12798 | unsigned int dummy; | |
12799 | const gdb_byte *buffer; | |
12800 | CORE_ADDR low = 0; | |
12801 | CORE_ADDR high = 0; | |
12802 | CORE_ADDR baseaddr; | |
12803 | bool overflow = false; | |
12804 | ||
12805 | found_base = cu->base_known; | |
12806 | base = cu->base_address; | |
12807 | ||
12808 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
12809 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
12810 | { | |
12811 | complaint (&symfile_complaints, | |
12812 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12813 | offset); | |
12814 | return false; | |
12815 | } | |
12816 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
12817 | ||
12818 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12819 | ||
12820 | while (1) | |
12821 | { | |
7814882a JK |
12822 | /* Initialize it due to a false compiler warning. */ |
12823 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
12824 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
12825 | + dwarf2_per_objfile->rnglists.size); | |
12826 | unsigned int bytes_read; | |
12827 | ||
12828 | if (buffer == buf_end) | |
12829 | { | |
12830 | overflow = true; | |
12831 | break; | |
12832 | } | |
12833 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
12834 | switch (rlet) | |
12835 | { | |
12836 | case DW_RLE_end_of_list: | |
12837 | break; | |
12838 | case DW_RLE_base_address: | |
12839 | if (buffer + cu->header.addr_size > buf_end) | |
12840 | { | |
12841 | overflow = true; | |
12842 | break; | |
12843 | } | |
12844 | base = read_address (obfd, buffer, cu, &bytes_read); | |
12845 | found_base = 1; | |
12846 | buffer += bytes_read; | |
12847 | break; | |
12848 | case DW_RLE_start_length: | |
12849 | if (buffer + cu->header.addr_size > buf_end) | |
12850 | { | |
12851 | overflow = true; | |
12852 | break; | |
12853 | } | |
12854 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12855 | buffer += bytes_read; | |
12856 | range_end = (range_beginning | |
12857 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
12858 | buffer += bytes_read; | |
12859 | if (buffer > buf_end) | |
12860 | { | |
12861 | overflow = true; | |
12862 | break; | |
12863 | } | |
12864 | break; | |
12865 | case DW_RLE_offset_pair: | |
12866 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12867 | buffer += bytes_read; | |
12868 | if (buffer > buf_end) | |
12869 | { | |
12870 | overflow = true; | |
12871 | break; | |
12872 | } | |
12873 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12874 | buffer += bytes_read; | |
12875 | if (buffer > buf_end) | |
12876 | { | |
12877 | overflow = true; | |
12878 | break; | |
12879 | } | |
12880 | break; | |
12881 | case DW_RLE_start_end: | |
12882 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
12883 | { | |
12884 | overflow = true; | |
12885 | break; | |
12886 | } | |
12887 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12888 | buffer += bytes_read; | |
12889 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
12890 | buffer += bytes_read; | |
12891 | break; | |
12892 | default: | |
12893 | complaint (&symfile_complaints, | |
12894 | _("Invalid .debug_rnglists data (no base address)")); | |
12895 | return false; | |
12896 | } | |
12897 | if (rlet == DW_RLE_end_of_list || overflow) | |
12898 | break; | |
12899 | if (rlet == DW_RLE_base_address) | |
12900 | continue; | |
12901 | ||
12902 | if (!found_base) | |
12903 | { | |
12904 | /* We have no valid base address for the ranges | |
12905 | data. */ | |
12906 | complaint (&symfile_complaints, | |
12907 | _("Invalid .debug_rnglists data (no base address)")); | |
12908 | return false; | |
12909 | } | |
12910 | ||
12911 | if (range_beginning > range_end) | |
12912 | { | |
12913 | /* Inverted range entries are invalid. */ | |
12914 | complaint (&symfile_complaints, | |
12915 | _("Invalid .debug_rnglists data (inverted range)")); | |
12916 | return false; | |
12917 | } | |
12918 | ||
12919 | /* Empty range entries have no effect. */ | |
12920 | if (range_beginning == range_end) | |
12921 | continue; | |
12922 | ||
12923 | range_beginning += base; | |
12924 | range_end += base; | |
12925 | ||
12926 | /* A not-uncommon case of bad debug info. | |
12927 | Don't pollute the addrmap with bad data. */ | |
12928 | if (range_beginning + baseaddr == 0 | |
12929 | && !dwarf2_per_objfile->has_section_at_zero) | |
12930 | { | |
12931 | complaint (&symfile_complaints, | |
12932 | _(".debug_rnglists entry has start address of zero" | |
12933 | " [in module %s]"), objfile_name (objfile)); | |
12934 | continue; | |
12935 | } | |
12936 | ||
12937 | callback (range_beginning, range_end); | |
12938 | } | |
12939 | ||
12940 | if (overflow) | |
12941 | { | |
12942 | complaint (&symfile_complaints, | |
12943 | _("Offset %d is not terminated " | |
12944 | "for DW_AT_ranges attribute"), | |
12945 | offset); | |
12946 | return false; | |
12947 | } | |
12948 | ||
12949 | return true; | |
12950 | } | |
12951 | ||
12952 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
12953 | Callback's type should be: | |
12954 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 12955 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 12956 | |
43988095 | 12957 | template <typename Callback> |
43039443 | 12958 | static int |
5f46c5a5 | 12959 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 12960 | Callback &&callback) |
43039443 JK |
12961 | { |
12962 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 12963 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
12964 | struct comp_unit_head *cu_header = &cu->header; |
12965 | bfd *obfd = objfile->obfd; | |
12966 | unsigned int addr_size = cu_header->addr_size; | |
12967 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12968 | /* Base address selection entry. */ | |
12969 | CORE_ADDR base; | |
12970 | int found_base; | |
12971 | unsigned int dummy; | |
d521ce57 | 12972 | const gdb_byte *buffer; |
ff013f42 | 12973 | CORE_ADDR baseaddr; |
43039443 | 12974 | |
43988095 JK |
12975 | if (cu_header->version >= 5) |
12976 | return dwarf2_rnglists_process (offset, cu, callback); | |
12977 | ||
d00adf39 DE |
12978 | found_base = cu->base_known; |
12979 | base = cu->base_address; | |
43039443 | 12980 | |
be391dca | 12981 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12982 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
12983 | { |
12984 | complaint (&symfile_complaints, | |
12985 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12986 | offset); | |
12987 | return 0; | |
12988 | } | |
dce234bc | 12989 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 12990 | |
e7030f15 | 12991 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 12992 | |
43039443 JK |
12993 | while (1) |
12994 | { | |
12995 | CORE_ADDR range_beginning, range_end; | |
12996 | ||
12997 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
12998 | buffer += addr_size; | |
12999 | range_end = read_address (obfd, buffer, cu, &dummy); | |
13000 | buffer += addr_size; | |
13001 | offset += 2 * addr_size; | |
13002 | ||
13003 | /* An end of list marker is a pair of zero addresses. */ | |
13004 | if (range_beginning == 0 && range_end == 0) | |
13005 | /* Found the end of list entry. */ | |
13006 | break; | |
13007 | ||
13008 | /* Each base address selection entry is a pair of 2 values. | |
13009 | The first is the largest possible address, the second is | |
13010 | the base address. Check for a base address here. */ | |
13011 | if ((range_beginning & mask) == mask) | |
13012 | { | |
28d2bfb9 AB |
13013 | /* If we found the largest possible address, then we already |
13014 | have the base address in range_end. */ | |
13015 | base = range_end; | |
43039443 JK |
13016 | found_base = 1; |
13017 | continue; | |
13018 | } | |
13019 | ||
13020 | if (!found_base) | |
13021 | { | |
13022 | /* We have no valid base address for the ranges | |
13023 | data. */ | |
13024 | complaint (&symfile_complaints, | |
13025 | _("Invalid .debug_ranges data (no base address)")); | |
13026 | return 0; | |
13027 | } | |
13028 | ||
9277c30c UW |
13029 | if (range_beginning > range_end) |
13030 | { | |
13031 | /* Inverted range entries are invalid. */ | |
13032 | complaint (&symfile_complaints, | |
13033 | _("Invalid .debug_ranges data (inverted range)")); | |
13034 | return 0; | |
13035 | } | |
13036 | ||
13037 | /* Empty range entries have no effect. */ | |
13038 | if (range_beginning == range_end) | |
13039 | continue; | |
13040 | ||
43039443 JK |
13041 | range_beginning += base; |
13042 | range_end += base; | |
13043 | ||
01093045 DE |
13044 | /* A not-uncommon case of bad debug info. |
13045 | Don't pollute the addrmap with bad data. */ | |
13046 | if (range_beginning + baseaddr == 0 | |
13047 | && !dwarf2_per_objfile->has_section_at_zero) | |
13048 | { | |
13049 | complaint (&symfile_complaints, | |
13050 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 13051 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13052 | continue; |
13053 | } | |
13054 | ||
5f46c5a5 JK |
13055 | callback (range_beginning, range_end); |
13056 | } | |
13057 | ||
13058 | return 1; | |
13059 | } | |
13060 | ||
13061 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13062 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13063 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13064 | ||
13065 | static int | |
13066 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13067 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
13068 | struct partial_symtab *ranges_pst) | |
13069 | { | |
13070 | struct objfile *objfile = cu->objfile; | |
13071 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13072 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
13073 | SECT_OFF_TEXT (objfile)); | |
13074 | int low_set = 0; | |
13075 | CORE_ADDR low = 0; | |
13076 | CORE_ADDR high = 0; | |
13077 | int retval; | |
13078 | ||
13079 | retval = dwarf2_ranges_process (offset, cu, | |
13080 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13081 | { | |
9277c30c | 13082 | if (ranges_pst != NULL) |
3e29f34a MR |
13083 | { |
13084 | CORE_ADDR lowpc; | |
13085 | CORE_ADDR highpc; | |
13086 | ||
13087 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13088 | range_beginning + baseaddr); | |
13089 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13090 | range_end + baseaddr); | |
13091 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
13092 | ranges_pst); | |
13093 | } | |
ff013f42 | 13094 | |
43039443 JK |
13095 | /* FIXME: This is recording everything as a low-high |
13096 | segment of consecutive addresses. We should have a | |
13097 | data structure for discontiguous block ranges | |
13098 | instead. */ | |
13099 | if (! low_set) | |
13100 | { | |
13101 | low = range_beginning; | |
13102 | high = range_end; | |
13103 | low_set = 1; | |
13104 | } | |
13105 | else | |
13106 | { | |
13107 | if (range_beginning < low) | |
13108 | low = range_beginning; | |
13109 | if (range_end > high) | |
13110 | high = range_end; | |
13111 | } | |
5f46c5a5 JK |
13112 | }); |
13113 | if (!retval) | |
13114 | return 0; | |
43039443 JK |
13115 | |
13116 | if (! low_set) | |
13117 | /* If the first entry is an end-of-list marker, the range | |
13118 | describes an empty scope, i.e. no instructions. */ | |
13119 | return 0; | |
13120 | ||
13121 | if (low_return) | |
13122 | *low_return = low; | |
13123 | if (high_return) | |
13124 | *high_return = high; | |
13125 | return 1; | |
13126 | } | |
13127 | ||
3a2b436a JK |
13128 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13129 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13130 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13131 | |
3a2b436a | 13132 | static enum pc_bounds_kind |
af34e669 | 13133 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
13134 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
13135 | struct partial_symtab *pst) | |
c906108c SS |
13136 | { |
13137 | struct attribute *attr; | |
91da1414 | 13138 | struct attribute *attr_high; |
af34e669 DJ |
13139 | CORE_ADDR low = 0; |
13140 | CORE_ADDR high = 0; | |
e385593e | 13141 | enum pc_bounds_kind ret; |
c906108c | 13142 | |
91da1414 MW |
13143 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13144 | if (attr_high) | |
af34e669 | 13145 | { |
e142c38c | 13146 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 13147 | if (attr) |
91da1414 | 13148 | { |
31aa7e4e JB |
13149 | low = attr_value_as_address (attr); |
13150 | high = attr_value_as_address (attr_high); | |
13151 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13152 | high += low; | |
91da1414 | 13153 | } |
af34e669 DJ |
13154 | else |
13155 | /* Found high w/o low attribute. */ | |
e385593e | 13156 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13157 | |
13158 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13159 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13160 | } |
c906108c | 13161 | else |
af34e669 | 13162 | { |
e142c38c | 13163 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13164 | if (attr != NULL) |
13165 | { | |
ab435259 DE |
13166 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13167 | We take advantage of the fact that DW_AT_ranges does not appear | |
13168 | in DW_TAG_compile_unit of DWO files. */ | |
13169 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13170 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13171 | + (need_ranges_base | |
13172 | ? cu->ranges_base | |
13173 | : 0)); | |
2e3cf129 | 13174 | |
af34e669 | 13175 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13176 | .debug_ranges section. */ |
2e3cf129 | 13177 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13178 | return PC_BOUNDS_INVALID; |
43039443 | 13179 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13180 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13181 | } |
e385593e JK |
13182 | else |
13183 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13184 | } |
c906108c | 13185 | |
9373cf26 JK |
13186 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
13187 | if (high <= low) | |
e385593e | 13188 | return PC_BOUNDS_INVALID; |
c906108c SS |
13189 | |
13190 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13191 | eliminate duplicate copies of functions and vtables and such. | |
13192 | The linker will arbitrarily choose one and discard the others. | |
13193 | The AT_*_pc values for such functions refer to local labels in | |
13194 | these sections. If the section from that file was discarded, the | |
13195 | labels are not in the output, so the relocs get a value of 0. | |
13196 | If this is a discarded function, mark the pc bounds as invalid, | |
13197 | so that GDB will ignore it. */ | |
72dca2f5 | 13198 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13199 | return PC_BOUNDS_INVALID; |
c906108c SS |
13200 | |
13201 | *lowpc = low; | |
96408a79 SA |
13202 | if (highpc) |
13203 | *highpc = high; | |
af34e669 | 13204 | return ret; |
c906108c SS |
13205 | } |
13206 | ||
b084d499 JB |
13207 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13208 | its low and high PC addresses. Do nothing if these addresses could not | |
13209 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13210 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13211 | ||
13212 | static void | |
13213 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13214 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13215 | struct dwarf2_cu *cu) | |
13216 | { | |
13217 | CORE_ADDR low, high; | |
13218 | struct die_info *child = die->child; | |
13219 | ||
e385593e | 13220 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13221 | { |
325fac50 PA |
13222 | *lowpc = std::min (*lowpc, low); |
13223 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13224 | } |
13225 | ||
13226 | /* If the language does not allow nested subprograms (either inside | |
13227 | subprograms or lexical blocks), we're done. */ | |
13228 | if (cu->language != language_ada) | |
13229 | return; | |
6e70227d | 13230 | |
b084d499 JB |
13231 | /* Check all the children of the given DIE. If it contains nested |
13232 | subprograms, then check their pc bounds. Likewise, we need to | |
13233 | check lexical blocks as well, as they may also contain subprogram | |
13234 | definitions. */ | |
13235 | while (child && child->tag) | |
13236 | { | |
13237 | if (child->tag == DW_TAG_subprogram | |
13238 | || child->tag == DW_TAG_lexical_block) | |
13239 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13240 | child = sibling_die (child); | |
13241 | } | |
13242 | } | |
13243 | ||
fae299cd DC |
13244 | /* Get the low and high pc's represented by the scope DIE, and store |
13245 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13246 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13247 | ||
13248 | static void | |
13249 | get_scope_pc_bounds (struct die_info *die, | |
13250 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13251 | struct dwarf2_cu *cu) | |
13252 | { | |
13253 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13254 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13255 | CORE_ADDR current_low, current_high; | |
13256 | ||
3a2b436a | 13257 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13258 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13259 | { |
13260 | best_low = current_low; | |
13261 | best_high = current_high; | |
13262 | } | |
13263 | else | |
13264 | { | |
13265 | struct die_info *child = die->child; | |
13266 | ||
13267 | while (child && child->tag) | |
13268 | { | |
13269 | switch (child->tag) { | |
13270 | case DW_TAG_subprogram: | |
b084d499 | 13271 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13272 | break; |
13273 | case DW_TAG_namespace: | |
f55ee35c | 13274 | case DW_TAG_module: |
fae299cd DC |
13275 | /* FIXME: carlton/2004-01-16: Should we do this for |
13276 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13277 | that current GCC's always emit the DIEs corresponding | |
13278 | to definitions of methods of classes as children of a | |
13279 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13280 | the DIEs giving the declarations, which could be | |
13281 | anywhere). But I don't see any reason why the | |
13282 | standards says that they have to be there. */ | |
13283 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13284 | ||
13285 | if (current_low != ((CORE_ADDR) -1)) | |
13286 | { | |
325fac50 PA |
13287 | best_low = std::min (best_low, current_low); |
13288 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13289 | } |
13290 | break; | |
13291 | default: | |
0963b4bd | 13292 | /* Ignore. */ |
fae299cd DC |
13293 | break; |
13294 | } | |
13295 | ||
13296 | child = sibling_die (child); | |
13297 | } | |
13298 | } | |
13299 | ||
13300 | *lowpc = best_low; | |
13301 | *highpc = best_high; | |
13302 | } | |
13303 | ||
801e3a5b JB |
13304 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13305 | in DIE. */ | |
380bca97 | 13306 | |
801e3a5b JB |
13307 | static void |
13308 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
13309 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
13310 | { | |
bb5ed363 | 13311 | struct objfile *objfile = cu->objfile; |
3e29f34a | 13312 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 13313 | struct attribute *attr; |
91da1414 | 13314 | struct attribute *attr_high; |
801e3a5b | 13315 | |
91da1414 MW |
13316 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13317 | if (attr_high) | |
801e3a5b | 13318 | { |
801e3a5b JB |
13319 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
13320 | if (attr) | |
13321 | { | |
31aa7e4e JB |
13322 | CORE_ADDR low = attr_value_as_address (attr); |
13323 | CORE_ADDR high = attr_value_as_address (attr_high); | |
13324 | ||
13325 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13326 | high += low; | |
9a619af0 | 13327 | |
3e29f34a MR |
13328 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
13329 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
13330 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
13331 | } |
13332 | } | |
13333 | ||
13334 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
13335 | if (attr) | |
13336 | { | |
bb5ed363 | 13337 | bfd *obfd = objfile->obfd; |
ab435259 DE |
13338 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13339 | We take advantage of the fact that DW_AT_ranges does not appear | |
13340 | in DW_TAG_compile_unit of DWO files. */ | |
13341 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
13342 | |
13343 | /* The value of the DW_AT_ranges attribute is the offset of the | |
13344 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
13345 | unsigned long offset = (DW_UNSND (attr) |
13346 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 13347 | const gdb_byte *buffer; |
801e3a5b JB |
13348 | |
13349 | /* For some target architectures, but not others, the | |
13350 | read_address function sign-extends the addresses it returns. | |
13351 | To recognize base address selection entries, we need a | |
13352 | mask. */ | |
13353 | unsigned int addr_size = cu->header.addr_size; | |
13354 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13355 | ||
13356 | /* The base address, to which the next pair is relative. Note | |
13357 | that this 'base' is a DWARF concept: most entries in a range | |
13358 | list are relative, to reduce the number of relocs against the | |
13359 | debugging information. This is separate from this function's | |
13360 | 'baseaddr' argument, which GDB uses to relocate debugging | |
13361 | information from a shared library based on the address at | |
13362 | which the library was loaded. */ | |
d00adf39 DE |
13363 | CORE_ADDR base = cu->base_address; |
13364 | int base_known = cu->base_known; | |
801e3a5b | 13365 | |
5f46c5a5 JK |
13366 | dwarf2_ranges_process (offset, cu, |
13367 | [&] (CORE_ADDR start, CORE_ADDR end) | |
13368 | { | |
58fdfd2c JK |
13369 | start += baseaddr; |
13370 | end += baseaddr; | |
5f46c5a5 JK |
13371 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
13372 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
13373 | record_block_range (block, start, end - 1); | |
13374 | }); | |
801e3a5b JB |
13375 | } |
13376 | } | |
13377 | ||
685b1105 JK |
13378 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
13379 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 13380 | |
685b1105 JK |
13381 | static void |
13382 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 13383 | { |
38360086 | 13384 | int major, minor; |
60d5a603 JK |
13385 | |
13386 | if (cu->producer == NULL) | |
13387 | { | |
13388 | /* For unknown compilers expect their behavior is DWARF version | |
13389 | compliant. | |
13390 | ||
13391 | GCC started to support .debug_types sections by -gdwarf-4 since | |
13392 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
13393 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
13394 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
13395 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 13396 | } |
b1ffba5a | 13397 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 13398 | { |
38360086 MW |
13399 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
13400 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 13401 | } |
5230b05a WT |
13402 | else if (producer_is_icc (cu->producer, &major, &minor)) |
13403 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
13404 | else |
13405 | { | |
13406 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
13407 | compliant. */ | |
60d5a603 JK |
13408 | } |
13409 | ||
ba919b58 | 13410 | cu->checked_producer = 1; |
685b1105 | 13411 | } |
ba919b58 | 13412 | |
685b1105 JK |
13413 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
13414 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
13415 | during 4.6.0 experimental. */ | |
13416 | ||
13417 | static int | |
13418 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
13419 | { | |
13420 | if (!cu->checked_producer) | |
13421 | check_producer (cu); | |
13422 | ||
13423 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
13424 | } |
13425 | ||
13426 | /* Return the default accessibility type if it is not overriden by | |
13427 | DW_AT_accessibility. */ | |
13428 | ||
13429 | static enum dwarf_access_attribute | |
13430 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
13431 | { | |
13432 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
13433 | { | |
13434 | /* The default DWARF 2 accessibility for members is public, the default | |
13435 | accessibility for inheritance is private. */ | |
13436 | ||
13437 | if (die->tag != DW_TAG_inheritance) | |
13438 | return DW_ACCESS_public; | |
13439 | else | |
13440 | return DW_ACCESS_private; | |
13441 | } | |
13442 | else | |
13443 | { | |
13444 | /* DWARF 3+ defines the default accessibility a different way. The same | |
13445 | rules apply now for DW_TAG_inheritance as for the members and it only | |
13446 | depends on the container kind. */ | |
13447 | ||
13448 | if (die->parent->tag == DW_TAG_class_type) | |
13449 | return DW_ACCESS_private; | |
13450 | else | |
13451 | return DW_ACCESS_public; | |
13452 | } | |
13453 | } | |
13454 | ||
74ac6d43 TT |
13455 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
13456 | offset. If the attribute was not found return 0, otherwise return | |
13457 | 1. If it was found but could not properly be handled, set *OFFSET | |
13458 | to 0. */ | |
13459 | ||
13460 | static int | |
13461 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
13462 | LONGEST *offset) | |
13463 | { | |
13464 | struct attribute *attr; | |
13465 | ||
13466 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
13467 | if (attr != NULL) | |
13468 | { | |
13469 | *offset = 0; | |
13470 | ||
13471 | /* Note that we do not check for a section offset first here. | |
13472 | This is because DW_AT_data_member_location is new in DWARF 4, | |
13473 | so if we see it, we can assume that a constant form is really | |
13474 | a constant and not a section offset. */ | |
13475 | if (attr_form_is_constant (attr)) | |
13476 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
13477 | else if (attr_form_is_section_offset (attr)) | |
13478 | dwarf2_complex_location_expr_complaint (); | |
13479 | else if (attr_form_is_block (attr)) | |
13480 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
13481 | else | |
13482 | dwarf2_complex_location_expr_complaint (); | |
13483 | ||
13484 | return 1; | |
13485 | } | |
13486 | ||
13487 | return 0; | |
13488 | } | |
13489 | ||
c906108c SS |
13490 | /* Add an aggregate field to the field list. */ |
13491 | ||
13492 | static void | |
107d2387 | 13493 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13494 | struct dwarf2_cu *cu) |
6e70227d | 13495 | { |
e7c27a73 | 13496 | struct objfile *objfile = cu->objfile; |
5e2b427d | 13497 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13498 | struct nextfield *new_field; |
13499 | struct attribute *attr; | |
13500 | struct field *fp; | |
15d034d0 | 13501 | const char *fieldname = ""; |
c906108c SS |
13502 | |
13503 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13504 | new_field = XNEW (struct nextfield); |
b8c9b27d | 13505 | make_cleanup (xfree, new_field); |
c906108c | 13506 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
13507 | |
13508 | if (die->tag == DW_TAG_inheritance) | |
13509 | { | |
13510 | new_field->next = fip->baseclasses; | |
13511 | fip->baseclasses = new_field; | |
13512 | } | |
13513 | else | |
13514 | { | |
13515 | new_field->next = fip->fields; | |
13516 | fip->fields = new_field; | |
13517 | } | |
c906108c SS |
13518 | fip->nfields++; |
13519 | ||
e142c38c | 13520 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
13521 | if (attr) |
13522 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
13523 | else |
13524 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
13525 | if (new_field->accessibility != DW_ACCESS_public) |
13526 | fip->non_public_fields = 1; | |
60d5a603 | 13527 | |
e142c38c | 13528 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
13529 | if (attr) |
13530 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
13531 | else |
13532 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
13533 | |
13534 | fp = &new_field->field; | |
a9a9bd0f | 13535 | |
e142c38c | 13536 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 13537 | { |
74ac6d43 TT |
13538 | LONGEST offset; |
13539 | ||
a9a9bd0f | 13540 | /* Data member other than a C++ static data member. */ |
6e70227d | 13541 | |
c906108c | 13542 | /* Get type of field. */ |
e7c27a73 | 13543 | fp->type = die_type (die, cu); |
c906108c | 13544 | |
d6a843b5 | 13545 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 13546 | |
c906108c | 13547 | /* Get bit size of field (zero if none). */ |
e142c38c | 13548 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
13549 | if (attr) |
13550 | { | |
13551 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
13552 | } | |
13553 | else | |
13554 | { | |
13555 | FIELD_BITSIZE (*fp) = 0; | |
13556 | } | |
13557 | ||
13558 | /* Get bit offset of field. */ | |
74ac6d43 TT |
13559 | if (handle_data_member_location (die, cu, &offset)) |
13560 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 13561 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
13562 | if (attr) |
13563 | { | |
5e2b427d | 13564 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
13565 | { |
13566 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
13567 | additional bit offset from the MSB of the containing |
13568 | anonymous object to the MSB of the field. We don't | |
13569 | have to do anything special since we don't need to | |
13570 | know the size of the anonymous object. */ | |
f41f5e61 | 13571 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
13572 | } |
13573 | else | |
13574 | { | |
13575 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
13576 | MSB of the anonymous object, subtract off the number of |
13577 | bits from the MSB of the field to the MSB of the | |
13578 | object, and then subtract off the number of bits of | |
13579 | the field itself. The result is the bit offset of | |
13580 | the LSB of the field. */ | |
c906108c SS |
13581 | int anonymous_size; |
13582 | int bit_offset = DW_UNSND (attr); | |
13583 | ||
e142c38c | 13584 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13585 | if (attr) |
13586 | { | |
13587 | /* The size of the anonymous object containing | |
13588 | the bit field is explicit, so use the | |
13589 | indicated size (in bytes). */ | |
13590 | anonymous_size = DW_UNSND (attr); | |
13591 | } | |
13592 | else | |
13593 | { | |
13594 | /* The size of the anonymous object containing | |
13595 | the bit field must be inferred from the type | |
13596 | attribute of the data member containing the | |
13597 | bit field. */ | |
13598 | anonymous_size = TYPE_LENGTH (fp->type); | |
13599 | } | |
f41f5e61 PA |
13600 | SET_FIELD_BITPOS (*fp, |
13601 | (FIELD_BITPOS (*fp) | |
13602 | + anonymous_size * bits_per_byte | |
13603 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13604 | } |
13605 | } | |
da5b30da AA |
13606 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13607 | if (attr != NULL) | |
13608 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13609 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13610 | |
13611 | /* Get name of field. */ | |
39cbfefa DJ |
13612 | fieldname = dwarf2_name (die, cu); |
13613 | if (fieldname == NULL) | |
13614 | fieldname = ""; | |
d8151005 DJ |
13615 | |
13616 | /* The name is already allocated along with this objfile, so we don't | |
13617 | need to duplicate it for the type. */ | |
13618 | fp->name = fieldname; | |
c906108c SS |
13619 | |
13620 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13621 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13622 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13623 | { |
d48cc9dd | 13624 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13625 | new_field->accessibility = DW_ACCESS_private; |
13626 | fip->non_public_fields = 1; | |
13627 | } | |
13628 | } | |
a9a9bd0f | 13629 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13630 | { |
a9a9bd0f DC |
13631 | /* C++ static member. */ |
13632 | ||
13633 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13634 | is a declaration, but all versions of G++ as of this writing | |
13635 | (so through at least 3.2.1) incorrectly generate | |
13636 | DW_TAG_variable tags. */ | |
6e70227d | 13637 | |
ff355380 | 13638 | const char *physname; |
c906108c | 13639 | |
a9a9bd0f | 13640 | /* Get name of field. */ |
39cbfefa DJ |
13641 | fieldname = dwarf2_name (die, cu); |
13642 | if (fieldname == NULL) | |
c906108c SS |
13643 | return; |
13644 | ||
254e6b9e | 13645 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13646 | if (attr |
13647 | /* Only create a symbol if this is an external value. | |
13648 | new_symbol checks this and puts the value in the global symbol | |
13649 | table, which we want. If it is not external, new_symbol | |
13650 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13651 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13652 | { |
13653 | /* A static const member, not much different than an enum as far as | |
13654 | we're concerned, except that we can support more types. */ | |
13655 | new_symbol (die, NULL, cu); | |
13656 | } | |
13657 | ||
2df3850c | 13658 | /* Get physical name. */ |
ff355380 | 13659 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13660 | |
d8151005 DJ |
13661 | /* The name is already allocated along with this objfile, so we don't |
13662 | need to duplicate it for the type. */ | |
13663 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13664 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13665 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13666 | } |
13667 | else if (die->tag == DW_TAG_inheritance) | |
13668 | { | |
74ac6d43 | 13669 | LONGEST offset; |
d4b96c9a | 13670 | |
74ac6d43 TT |
13671 | /* C++ base class field. */ |
13672 | if (handle_data_member_location (die, cu, &offset)) | |
13673 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 13674 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 13675 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
13676 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
13677 | fip->nbaseclasses++; | |
13678 | } | |
13679 | } | |
13680 | ||
98751a41 JK |
13681 | /* Add a typedef defined in the scope of the FIP's class. */ |
13682 | ||
13683 | static void | |
13684 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
13685 | struct dwarf2_cu *cu) | |
6e70227d | 13686 | { |
98751a41 | 13687 | struct typedef_field_list *new_field; |
98751a41 | 13688 | struct typedef_field *fp; |
98751a41 JK |
13689 | |
13690 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13691 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
13692 | make_cleanup (xfree, new_field); |
13693 | ||
13694 | gdb_assert (die->tag == DW_TAG_typedef); | |
13695 | ||
13696 | fp = &new_field->field; | |
13697 | ||
13698 | /* Get name of field. */ | |
13699 | fp->name = dwarf2_name (die, cu); | |
13700 | if (fp->name == NULL) | |
13701 | return; | |
13702 | ||
13703 | fp->type = read_type_die (die, cu); | |
13704 | ||
c191a687 KS |
13705 | /* Save accessibility. */ |
13706 | enum dwarf_access_attribute accessibility; | |
13707 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
13708 | if (attr != NULL) | |
13709 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
13710 | else | |
13711 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13712 | switch (accessibility) | |
13713 | { | |
13714 | case DW_ACCESS_public: | |
13715 | /* The assumed value if neither private nor protected. */ | |
13716 | break; | |
13717 | case DW_ACCESS_private: | |
13718 | fp->is_private = 1; | |
13719 | break; | |
13720 | case DW_ACCESS_protected: | |
13721 | fp->is_protected = 1; | |
13722 | break; | |
13723 | default: | |
37534686 KS |
13724 | complaint (&symfile_complaints, |
13725 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); | |
c191a687 KS |
13726 | } |
13727 | ||
98751a41 JK |
13728 | new_field->next = fip->typedef_field_list; |
13729 | fip->typedef_field_list = new_field; | |
13730 | fip->typedef_field_list_count++; | |
13731 | } | |
13732 | ||
c906108c SS |
13733 | /* Create the vector of fields, and attach it to the type. */ |
13734 | ||
13735 | static void | |
fba45db2 | 13736 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13737 | struct dwarf2_cu *cu) |
c906108c SS |
13738 | { |
13739 | int nfields = fip->nfields; | |
13740 | ||
13741 | /* Record the field count, allocate space for the array of fields, | |
13742 | and create blank accessibility bitfields if necessary. */ | |
13743 | TYPE_NFIELDS (type) = nfields; | |
13744 | TYPE_FIELDS (type) = (struct field *) | |
13745 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
13746 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
13747 | ||
b4ba55a1 | 13748 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
13749 | { |
13750 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13751 | ||
13752 | TYPE_FIELD_PRIVATE_BITS (type) = | |
13753 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13754 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
13755 | ||
13756 | TYPE_FIELD_PROTECTED_BITS (type) = | |
13757 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13758 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
13759 | ||
774b6a14 TT |
13760 | TYPE_FIELD_IGNORE_BITS (type) = |
13761 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13762 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
13763 | } |
13764 | ||
13765 | /* If the type has baseclasses, allocate and clear a bit vector for | |
13766 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 13767 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
13768 | { |
13769 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 13770 | unsigned char *pointer; |
c906108c SS |
13771 | |
13772 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 13773 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 13774 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
13775 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
13776 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
13777 | } | |
13778 | ||
3e43a32a MS |
13779 | /* Copy the saved-up fields into the field vector. Start from the head of |
13780 | the list, adding to the tail of the field array, so that they end up in | |
13781 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
13782 | while (nfields-- > 0) |
13783 | { | |
7d0ccb61 DJ |
13784 | struct nextfield *fieldp; |
13785 | ||
13786 | if (fip->fields) | |
13787 | { | |
13788 | fieldp = fip->fields; | |
13789 | fip->fields = fieldp->next; | |
13790 | } | |
13791 | else | |
13792 | { | |
13793 | fieldp = fip->baseclasses; | |
13794 | fip->baseclasses = fieldp->next; | |
13795 | } | |
13796 | ||
13797 | TYPE_FIELD (type, nfields) = fieldp->field; | |
13798 | switch (fieldp->accessibility) | |
c906108c | 13799 | { |
c5aa993b | 13800 | case DW_ACCESS_private: |
b4ba55a1 JB |
13801 | if (cu->language != language_ada) |
13802 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 13803 | break; |
c906108c | 13804 | |
c5aa993b | 13805 | case DW_ACCESS_protected: |
b4ba55a1 JB |
13806 | if (cu->language != language_ada) |
13807 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 13808 | break; |
c906108c | 13809 | |
c5aa993b JM |
13810 | case DW_ACCESS_public: |
13811 | break; | |
c906108c | 13812 | |
c5aa993b JM |
13813 | default: |
13814 | /* Unknown accessibility. Complain and treat it as public. */ | |
13815 | { | |
e2e0b3e5 | 13816 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 13817 | fieldp->accessibility); |
c5aa993b JM |
13818 | } |
13819 | break; | |
c906108c SS |
13820 | } |
13821 | if (nfields < fip->nbaseclasses) | |
13822 | { | |
7d0ccb61 | 13823 | switch (fieldp->virtuality) |
c906108c | 13824 | { |
c5aa993b JM |
13825 | case DW_VIRTUALITY_virtual: |
13826 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 13827 | if (cu->language == language_ada) |
a73c6dcd | 13828 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
13829 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
13830 | break; | |
c906108c SS |
13831 | } |
13832 | } | |
c906108c SS |
13833 | } |
13834 | } | |
13835 | ||
7d27a96d TT |
13836 | /* Return true if this member function is a constructor, false |
13837 | otherwise. */ | |
13838 | ||
13839 | static int | |
13840 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
13841 | { | |
13842 | const char *fieldname; | |
fe978cb0 | 13843 | const char *type_name; |
7d27a96d TT |
13844 | int len; |
13845 | ||
13846 | if (die->parent == NULL) | |
13847 | return 0; | |
13848 | ||
13849 | if (die->parent->tag != DW_TAG_structure_type | |
13850 | && die->parent->tag != DW_TAG_union_type | |
13851 | && die->parent->tag != DW_TAG_class_type) | |
13852 | return 0; | |
13853 | ||
13854 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
13855 | type_name = dwarf2_name (die->parent, cu); |
13856 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
13857 | return 0; |
13858 | ||
13859 | len = strlen (fieldname); | |
fe978cb0 PA |
13860 | return (strncmp (fieldname, type_name, len) == 0 |
13861 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
13862 | } |
13863 | ||
c906108c SS |
13864 | /* Add a member function to the proper fieldlist. */ |
13865 | ||
13866 | static void | |
107d2387 | 13867 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13868 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 13869 | { |
e7c27a73 | 13870 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13871 | struct attribute *attr; |
13872 | struct fnfieldlist *flp; | |
13873 | int i; | |
13874 | struct fn_field *fnp; | |
15d034d0 | 13875 | const char *fieldname; |
c906108c | 13876 | struct nextfnfield *new_fnfield; |
f792889a | 13877 | struct type *this_type; |
60d5a603 | 13878 | enum dwarf_access_attribute accessibility; |
c906108c | 13879 | |
b4ba55a1 | 13880 | if (cu->language == language_ada) |
a73c6dcd | 13881 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 13882 | |
2df3850c | 13883 | /* Get name of member function. */ |
39cbfefa DJ |
13884 | fieldname = dwarf2_name (die, cu); |
13885 | if (fieldname == NULL) | |
2df3850c | 13886 | return; |
c906108c | 13887 | |
c906108c SS |
13888 | /* Look up member function name in fieldlist. */ |
13889 | for (i = 0; i < fip->nfnfields; i++) | |
13890 | { | |
27bfe10e | 13891 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
13892 | break; |
13893 | } | |
13894 | ||
13895 | /* Create new list element if necessary. */ | |
13896 | if (i < fip->nfnfields) | |
13897 | flp = &fip->fnfieldlists[i]; | |
13898 | else | |
13899 | { | |
13900 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13901 | { | |
13902 | fip->fnfieldlists = (struct fnfieldlist *) | |
13903 | xrealloc (fip->fnfieldlists, | |
13904 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13905 | * sizeof (struct fnfieldlist)); |
c906108c | 13906 | if (fip->nfnfields == 0) |
c13c43fd | 13907 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
13908 | } |
13909 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
13910 | flp->name = fieldname; | |
13911 | flp->length = 0; | |
13912 | flp->head = NULL; | |
3da10d80 | 13913 | i = fip->nfnfields++; |
c906108c SS |
13914 | } |
13915 | ||
13916 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 13917 | entry. */ |
8d749320 | 13918 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 13919 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
13920 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
13921 | new_fnfield->next = flp->head; | |
13922 | flp->head = new_fnfield; | |
13923 | flp->length++; | |
13924 | ||
13925 | /* Fill in the member function field info. */ | |
13926 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
13927 | |
13928 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 13929 | if (cu->language == language_cplus) |
3da10d80 KS |
13930 | { |
13931 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
13932 | die, cu); | |
13933 | } | |
13934 | else | |
13935 | { | |
1d06ead6 | 13936 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
13937 | fnp->physname = physname ? physname : ""; |
13938 | } | |
13939 | ||
c906108c | 13940 | fnp->type = alloc_type (objfile); |
f792889a DJ |
13941 | this_type = read_type_die (die, cu); |
13942 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 13943 | { |
f792889a | 13944 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 13945 | |
f792889a | 13946 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
13947 | of the method itself (TYPE_CODE_METHOD). */ |
13948 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
13949 | TYPE_TARGET_TYPE (this_type), |
13950 | TYPE_FIELDS (this_type), | |
13951 | TYPE_NFIELDS (this_type), | |
13952 | TYPE_VARARGS (this_type)); | |
c906108c SS |
13953 | |
13954 | /* Handle static member functions. | |
c5aa993b | 13955 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
13956 | member functions. G++ helps GDB by marking the first |
13957 | parameter for non-static member functions (which is the this | |
13958 | pointer) as artificial. We obtain this information from | |
13959 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 13960 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
13961 | fnp->voffset = VOFFSET_STATIC; |
13962 | } | |
13963 | else | |
e2e0b3e5 | 13964 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 13965 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
13966 | |
13967 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 13968 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 13969 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 13970 | |
3e43a32a MS |
13971 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
13972 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
13973 | |
13974 | /* Get accessibility. */ | |
e142c38c | 13975 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 13976 | if (attr) |
aead7601 | 13977 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
13978 | else |
13979 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13980 | switch (accessibility) | |
c906108c | 13981 | { |
60d5a603 JK |
13982 | case DW_ACCESS_private: |
13983 | fnp->is_private = 1; | |
13984 | break; | |
13985 | case DW_ACCESS_protected: | |
13986 | fnp->is_protected = 1; | |
13987 | break; | |
c906108c SS |
13988 | } |
13989 | ||
b02dede2 | 13990 | /* Check for artificial methods. */ |
e142c38c | 13991 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
13992 | if (attr && DW_UNSND (attr) != 0) |
13993 | fnp->is_artificial = 1; | |
13994 | ||
7d27a96d TT |
13995 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
13996 | ||
0d564a31 | 13997 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
13998 | function. For older versions of GCC, this is an offset in the |
13999 | appropriate virtual table, as specified by DW_AT_containing_type. | |
14000 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
14001 | to the object address. */ |
14002 | ||
e142c38c | 14003 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 14004 | if (attr) |
8e19ed76 | 14005 | { |
aec5aa8b | 14006 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14007 | { |
aec5aa8b TT |
14008 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14009 | { | |
14010 | /* Old-style GCC. */ | |
14011 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14012 | } | |
14013 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14014 | || (DW_BLOCK (attr)->size > 1 | |
14015 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14016 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14017 | { | |
aec5aa8b TT |
14018 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14019 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14020 | dwarf2_complex_location_expr_complaint (); | |
14021 | else | |
14022 | fnp->voffset /= cu->header.addr_size; | |
14023 | fnp->voffset += 2; | |
14024 | } | |
14025 | else | |
14026 | dwarf2_complex_location_expr_complaint (); | |
14027 | ||
14028 | if (!fnp->fcontext) | |
7e993ebf KS |
14029 | { |
14030 | /* If there is no `this' field and no DW_AT_containing_type, | |
14031 | we cannot actually find a base class context for the | |
14032 | vtable! */ | |
14033 | if (TYPE_NFIELDS (this_type) == 0 | |
14034 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14035 | { | |
14036 | complaint (&symfile_complaints, | |
14037 | _("cannot determine context for virtual member " | |
14038 | "function \"%s\" (offset %d)"), | |
9c541725 | 14039 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
14040 | } |
14041 | else | |
14042 | { | |
14043 | fnp->fcontext | |
14044 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14045 | } | |
14046 | } | |
aec5aa8b | 14047 | } |
3690dd37 | 14048 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 14049 | { |
4d3c2250 | 14050 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14051 | } |
14052 | else | |
14053 | { | |
4d3c2250 KB |
14054 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14055 | fieldname); | |
8e19ed76 | 14056 | } |
0d564a31 | 14057 | } |
d48cc9dd DJ |
14058 | else |
14059 | { | |
14060 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14061 | if (attr && DW_UNSND (attr)) | |
14062 | { | |
14063 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
14064 | complaint (&symfile_complaints, | |
3e43a32a MS |
14065 | _("Member function \"%s\" (offset %d) is virtual " |
14066 | "but the vtable offset is not specified"), | |
9c541725 | 14067 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 14068 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14069 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14070 | } | |
14071 | } | |
c906108c SS |
14072 | } |
14073 | ||
14074 | /* Create the vector of member function fields, and attach it to the type. */ | |
14075 | ||
14076 | static void | |
fba45db2 | 14077 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14078 | struct dwarf2_cu *cu) |
c906108c SS |
14079 | { |
14080 | struct fnfieldlist *flp; | |
c906108c SS |
14081 | int i; |
14082 | ||
b4ba55a1 | 14083 | if (cu->language == language_ada) |
a73c6dcd | 14084 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14085 | |
c906108c SS |
14086 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14087 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
14088 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
14089 | ||
14090 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
14091 | { | |
14092 | struct nextfnfield *nfp = flp->head; | |
14093 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
14094 | int k; | |
14095 | ||
14096 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
14097 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
14098 | fn_flp->fn_fields = (struct fn_field *) | |
14099 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
14100 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 14101 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
14102 | } |
14103 | ||
14104 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
14105 | } |
14106 | ||
1168df01 JB |
14107 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14108 | language, zero otherwise. */ | |
14109 | static int | |
14110 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14111 | { | |
14112 | static const char vptr[] = "_vptr"; | |
987504bb | 14113 | static const char vtable[] = "vtable"; |
1168df01 | 14114 | |
9c37b5ae TT |
14115 | /* Look for the C++ form of the vtable. */ |
14116 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14117 | return 1; |
14118 | ||
14119 | return 0; | |
14120 | } | |
14121 | ||
c0dd20ea | 14122 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14123 | functions, with the ABI-specified layout. If TYPE describes |
14124 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14125 | |
14126 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14127 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14128 | |
0b92b5bb TT |
14129 | static void |
14130 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14131 | { |
09e2d7c7 | 14132 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14133 | |
14134 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14135 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14136 | return; | |
c0dd20ea DJ |
14137 | |
14138 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14139 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14140 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14141 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14142 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14143 | return; | |
c0dd20ea DJ |
14144 | |
14145 | /* Find the type of the method. */ | |
0b92b5bb | 14146 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14147 | if (pfn_type == NULL |
14148 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14149 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14150 | return; |
c0dd20ea DJ |
14151 | |
14152 | /* Look for the "this" argument. */ | |
14153 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14154 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14155 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14156 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14157 | return; |
c0dd20ea | 14158 | |
09e2d7c7 | 14159 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14160 | new_type = alloc_type (objfile); |
09e2d7c7 | 14161 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14162 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14163 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14164 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14165 | } |
1168df01 | 14166 | |
685b1105 | 14167 | |
c906108c | 14168 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
14169 | (definition) to create a type for the structure or union. Fill in |
14170 | the type's name and general properties; the members will not be | |
83655187 DE |
14171 | processed until process_structure_scope. A symbol table entry for |
14172 | the type will also not be done until process_structure_scope (assuming | |
14173 | the type has a name). | |
c906108c | 14174 | |
c767944b DJ |
14175 | NOTE: we need to call these functions regardless of whether or not the |
14176 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 14177 | structure or union. This gets the type entered into our set of |
83655187 | 14178 | user defined types. */ |
c906108c | 14179 | |
f792889a | 14180 | static struct type * |
134d01f1 | 14181 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14182 | { |
e7c27a73 | 14183 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14184 | struct type *type; |
14185 | struct attribute *attr; | |
15d034d0 | 14186 | const char *name; |
c906108c | 14187 | |
348e048f DE |
14188 | /* If the definition of this type lives in .debug_types, read that type. |
14189 | Don't follow DW_AT_specification though, that will take us back up | |
14190 | the chain and we want to go down. */ | |
45e58e77 | 14191 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14192 | if (attr) |
14193 | { | |
ac9ec31b | 14194 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14195 | |
ac9ec31b | 14196 | /* The type's CU may not be the same as CU. |
02142a6c | 14197 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14198 | return set_die_type (die, type, cu); |
14199 | } | |
14200 | ||
c0dd20ea | 14201 | type = alloc_type (objfile); |
c906108c | 14202 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 14203 | |
39cbfefa DJ |
14204 | name = dwarf2_name (die, cu); |
14205 | if (name != NULL) | |
c906108c | 14206 | { |
987504bb | 14207 | if (cu->language == language_cplus |
c44af4eb TT |
14208 | || cu->language == language_d |
14209 | || cu->language == language_rust) | |
63d06c5c | 14210 | { |
15d034d0 | 14211 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
14212 | |
14213 | /* dwarf2_full_name might have already finished building the DIE's | |
14214 | type. If so, there is no need to continue. */ | |
14215 | if (get_die_type (die, cu) != NULL) | |
14216 | return get_die_type (die, cu); | |
14217 | ||
14218 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
14219 | if (die->tag == DW_TAG_structure_type |
14220 | || die->tag == DW_TAG_class_type) | |
14221 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
14222 | } |
14223 | else | |
14224 | { | |
d8151005 DJ |
14225 | /* The name is already allocated along with this objfile, so |
14226 | we don't need to duplicate it for the type. */ | |
7d455152 | 14227 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
14228 | if (die->tag == DW_TAG_class_type) |
14229 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 14230 | } |
c906108c SS |
14231 | } |
14232 | ||
14233 | if (die->tag == DW_TAG_structure_type) | |
14234 | { | |
14235 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
14236 | } | |
14237 | else if (die->tag == DW_TAG_union_type) | |
14238 | { | |
14239 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
14240 | } | |
14241 | else | |
14242 | { | |
4753d33b | 14243 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
14244 | } |
14245 | ||
0cc2414c TT |
14246 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
14247 | TYPE_DECLARED_CLASS (type) = 1; | |
14248 | ||
e142c38c | 14249 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14250 | if (attr) |
14251 | { | |
155bfbd3 JB |
14252 | if (attr_form_is_constant (attr)) |
14253 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14254 | else | |
14255 | { | |
14256 | /* For the moment, dynamic type sizes are not supported | |
14257 | by GDB's struct type. The actual size is determined | |
14258 | on-demand when resolving the type of a given object, | |
14259 | so set the type's length to zero for now. Otherwise, | |
14260 | we record an expression as the length, and that expression | |
14261 | could lead to a very large value, which could eventually | |
14262 | lead to us trying to allocate that much memory when creating | |
14263 | a value of that type. */ | |
14264 | TYPE_LENGTH (type) = 0; | |
14265 | } | |
c906108c SS |
14266 | } |
14267 | else | |
14268 | { | |
14269 | TYPE_LENGTH (type) = 0; | |
14270 | } | |
14271 | ||
5230b05a | 14272 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 14273 | { |
5230b05a WT |
14274 | /* ICC<14 does not output the required DW_AT_declaration on |
14275 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 14276 | TYPE_STUB (type) = 1; |
685b1105 JK |
14277 | } |
14278 | else | |
14279 | TYPE_STUB_SUPPORTED (type) = 1; | |
14280 | ||
dc718098 | 14281 | if (die_is_declaration (die, cu)) |
876cecd0 | 14282 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
14283 | else if (attr == NULL && die->child == NULL |
14284 | && producer_is_realview (cu->producer)) | |
14285 | /* RealView does not output the required DW_AT_declaration | |
14286 | on incomplete types. */ | |
14287 | TYPE_STUB (type) = 1; | |
dc718098 | 14288 | |
c906108c SS |
14289 | /* We need to add the type field to the die immediately so we don't |
14290 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 14291 | type within the structure itself. */ |
1c379e20 | 14292 | set_die_type (die, type, cu); |
c906108c | 14293 | |
7e314c57 JK |
14294 | /* set_die_type should be already done. */ |
14295 | set_descriptive_type (type, die, cu); | |
14296 | ||
c767944b DJ |
14297 | return type; |
14298 | } | |
14299 | ||
14300 | /* Finish creating a structure or union type, including filling in | |
14301 | its members and creating a symbol for it. */ | |
14302 | ||
14303 | static void | |
14304 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14305 | { | |
14306 | struct objfile *objfile = cu->objfile; | |
ca040673 | 14307 | struct die_info *child_die; |
c767944b DJ |
14308 | struct type *type; |
14309 | ||
14310 | type = get_die_type (die, cu); | |
14311 | if (type == NULL) | |
14312 | type = read_structure_type (die, cu); | |
14313 | ||
e142c38c | 14314 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
14315 | { |
14316 | struct field_info fi; | |
34eaf542 | 14317 | VEC (symbolp) *template_args = NULL; |
c767944b | 14318 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
14319 | |
14320 | memset (&fi, 0, sizeof (struct field_info)); | |
14321 | ||
639d11d3 | 14322 | child_die = die->child; |
c906108c SS |
14323 | |
14324 | while (child_die && child_die->tag) | |
14325 | { | |
a9a9bd0f DC |
14326 | if (child_die->tag == DW_TAG_member |
14327 | || child_die->tag == DW_TAG_variable) | |
c906108c | 14328 | { |
a9a9bd0f DC |
14329 | /* NOTE: carlton/2002-11-05: A C++ static data member |
14330 | should be a DW_TAG_member that is a declaration, but | |
14331 | all versions of G++ as of this writing (so through at | |
14332 | least 3.2.1) incorrectly generate DW_TAG_variable | |
14333 | tags for them instead. */ | |
e7c27a73 | 14334 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14335 | } |
8713b1b1 | 14336 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 14337 | { |
e98c9e7c TT |
14338 | /* Rust doesn't have member functions in the C++ sense. |
14339 | However, it does emit ordinary functions as children | |
14340 | of a struct DIE. */ | |
14341 | if (cu->language == language_rust) | |
14342 | read_func_scope (child_die, cu); | |
14343 | else | |
14344 | { | |
14345 | /* C++ member function. */ | |
14346 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
14347 | } | |
c906108c SS |
14348 | } |
14349 | else if (child_die->tag == DW_TAG_inheritance) | |
14350 | { | |
14351 | /* C++ base class field. */ | |
e7c27a73 | 14352 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14353 | } |
98751a41 JK |
14354 | else if (child_die->tag == DW_TAG_typedef) |
14355 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
14356 | else if (child_die->tag == DW_TAG_template_type_param |
14357 | || child_die->tag == DW_TAG_template_value_param) | |
14358 | { | |
14359 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
14360 | ||
f1078f66 DJ |
14361 | if (arg != NULL) |
14362 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
14363 | } |
14364 | ||
c906108c SS |
14365 | child_die = sibling_die (child_die); |
14366 | } | |
14367 | ||
34eaf542 TT |
14368 | /* Attach template arguments to type. */ |
14369 | if (! VEC_empty (symbolp, template_args)) | |
14370 | { | |
14371 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14372 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
14373 | = VEC_length (symbolp, template_args); | |
14374 | TYPE_TEMPLATE_ARGUMENTS (type) | |
8d749320 SM |
14375 | = XOBNEWVEC (&objfile->objfile_obstack, |
14376 | struct symbol *, | |
14377 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 TT |
14378 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
14379 | VEC_address (symbolp, template_args), | |
14380 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
14381 | * sizeof (struct symbol *))); | |
14382 | VEC_free (symbolp, template_args); | |
14383 | } | |
14384 | ||
c906108c SS |
14385 | /* Attach fields and member functions to the type. */ |
14386 | if (fi.nfields) | |
e7c27a73 | 14387 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
14388 | if (fi.nfnfields) |
14389 | { | |
e7c27a73 | 14390 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 14391 | |
c5aa993b | 14392 | /* Get the type which refers to the base class (possibly this |
c906108c | 14393 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
14394 | class from the DW_AT_containing_type attribute. This use of |
14395 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 14396 | |
e142c38c | 14397 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 14398 | { |
e7c27a73 | 14399 | struct type *t = die_containing_type (die, cu); |
c906108c | 14400 | |
ae6ae975 | 14401 | set_type_vptr_basetype (type, t); |
c906108c SS |
14402 | if (type == t) |
14403 | { | |
c906108c SS |
14404 | int i; |
14405 | ||
14406 | /* Our own class provides vtbl ptr. */ | |
14407 | for (i = TYPE_NFIELDS (t) - 1; | |
14408 | i >= TYPE_N_BASECLASSES (t); | |
14409 | --i) | |
14410 | { | |
0d5cff50 | 14411 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 14412 | |
1168df01 | 14413 | if (is_vtable_name (fieldname, cu)) |
c906108c | 14414 | { |
ae6ae975 | 14415 | set_type_vptr_fieldno (type, i); |
c906108c SS |
14416 | break; |
14417 | } | |
14418 | } | |
14419 | ||
14420 | /* Complain if virtual function table field not found. */ | |
14421 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 14422 | complaint (&symfile_complaints, |
3e43a32a MS |
14423 | _("virtual function table pointer " |
14424 | "not found when defining class '%s'"), | |
4d3c2250 KB |
14425 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
14426 | ""); | |
c906108c SS |
14427 | } |
14428 | else | |
14429 | { | |
ae6ae975 | 14430 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
14431 | } |
14432 | } | |
f6235d4c | 14433 | else if (cu->producer |
61012eef | 14434 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
14435 | { |
14436 | /* The IBM XLC compiler does not provide direct indication | |
14437 | of the containing type, but the vtable pointer is | |
14438 | always named __vfp. */ | |
14439 | ||
14440 | int i; | |
14441 | ||
14442 | for (i = TYPE_NFIELDS (type) - 1; | |
14443 | i >= TYPE_N_BASECLASSES (type); | |
14444 | --i) | |
14445 | { | |
14446 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
14447 | { | |
ae6ae975 DE |
14448 | set_type_vptr_fieldno (type, i); |
14449 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
14450 | break; |
14451 | } | |
14452 | } | |
14453 | } | |
c906108c | 14454 | } |
98751a41 JK |
14455 | |
14456 | /* Copy fi.typedef_field_list linked list elements content into the | |
14457 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
14458 | if (fi.typedef_field_list) | |
14459 | { | |
14460 | int i = fi.typedef_field_list_count; | |
14461 | ||
a0d7a4ff | 14462 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 14463 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
14464 | = ((struct typedef_field *) |
14465 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
14466 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
14467 | ||
14468 | /* Reverse the list order to keep the debug info elements order. */ | |
14469 | while (--i >= 0) | |
14470 | { | |
14471 | struct typedef_field *dest, *src; | |
6e70227d | 14472 | |
98751a41 JK |
14473 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
14474 | src = &fi.typedef_field_list->field; | |
14475 | fi.typedef_field_list = fi.typedef_field_list->next; | |
14476 | *dest = *src; | |
14477 | } | |
14478 | } | |
c767944b DJ |
14479 | |
14480 | do_cleanups (back_to); | |
c906108c | 14481 | } |
63d06c5c | 14482 | |
bb5ed363 | 14483 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 14484 | |
90aeadfc DC |
14485 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
14486 | snapshots) has been known to create a die giving a declaration | |
14487 | for a class that has, as a child, a die giving a definition for a | |
14488 | nested class. So we have to process our children even if the | |
14489 | current die is a declaration. Normally, of course, a declaration | |
14490 | won't have any children at all. */ | |
134d01f1 | 14491 | |
ca040673 DE |
14492 | child_die = die->child; |
14493 | ||
90aeadfc DC |
14494 | while (child_die != NULL && child_die->tag) |
14495 | { | |
14496 | if (child_die->tag == DW_TAG_member | |
14497 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
14498 | || child_die->tag == DW_TAG_inheritance |
14499 | || child_die->tag == DW_TAG_template_value_param | |
14500 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 14501 | { |
90aeadfc | 14502 | /* Do nothing. */ |
134d01f1 | 14503 | } |
90aeadfc DC |
14504 | else |
14505 | process_die (child_die, cu); | |
134d01f1 | 14506 | |
90aeadfc | 14507 | child_die = sibling_die (child_die); |
134d01f1 DJ |
14508 | } |
14509 | ||
fa4028e9 JB |
14510 | /* Do not consider external references. According to the DWARF standard, |
14511 | these DIEs are identified by the fact that they have no byte_size | |
14512 | attribute, and a declaration attribute. */ | |
14513 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
14514 | || !die_is_declaration (die, cu)) | |
c767944b | 14515 | new_symbol (die, type, cu); |
134d01f1 DJ |
14516 | } |
14517 | ||
55426c9d JB |
14518 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
14519 | update TYPE using some information only available in DIE's children. */ | |
14520 | ||
14521 | static void | |
14522 | update_enumeration_type_from_children (struct die_info *die, | |
14523 | struct type *type, | |
14524 | struct dwarf2_cu *cu) | |
14525 | { | |
60f7655a | 14526 | struct die_info *child_die; |
55426c9d JB |
14527 | int unsigned_enum = 1; |
14528 | int flag_enum = 1; | |
14529 | ULONGEST mask = 0; | |
55426c9d | 14530 | |
8268c778 | 14531 | auto_obstack obstack; |
55426c9d | 14532 | |
60f7655a DE |
14533 | for (child_die = die->child; |
14534 | child_die != NULL && child_die->tag; | |
14535 | child_die = sibling_die (child_die)) | |
55426c9d JB |
14536 | { |
14537 | struct attribute *attr; | |
14538 | LONGEST value; | |
14539 | const gdb_byte *bytes; | |
14540 | struct dwarf2_locexpr_baton *baton; | |
14541 | const char *name; | |
60f7655a | 14542 | |
55426c9d JB |
14543 | if (child_die->tag != DW_TAG_enumerator) |
14544 | continue; | |
14545 | ||
14546 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
14547 | if (attr == NULL) | |
14548 | continue; | |
14549 | ||
14550 | name = dwarf2_name (child_die, cu); | |
14551 | if (name == NULL) | |
14552 | name = "<anonymous enumerator>"; | |
14553 | ||
14554 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
14555 | &value, &bytes, &baton); | |
14556 | if (value < 0) | |
14557 | { | |
14558 | unsigned_enum = 0; | |
14559 | flag_enum = 0; | |
14560 | } | |
14561 | else if ((mask & value) != 0) | |
14562 | flag_enum = 0; | |
14563 | else | |
14564 | mask |= value; | |
14565 | ||
14566 | /* If we already know that the enum type is neither unsigned, nor | |
14567 | a flag type, no need to look at the rest of the enumerates. */ | |
14568 | if (!unsigned_enum && !flag_enum) | |
14569 | break; | |
55426c9d JB |
14570 | } |
14571 | ||
14572 | if (unsigned_enum) | |
14573 | TYPE_UNSIGNED (type) = 1; | |
14574 | if (flag_enum) | |
14575 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
14576 | } |
14577 | ||
134d01f1 DJ |
14578 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
14579 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 14580 | |
f792889a | 14581 | static struct type * |
134d01f1 | 14582 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14583 | { |
e7c27a73 | 14584 | struct objfile *objfile = cu->objfile; |
c906108c | 14585 | struct type *type; |
c906108c | 14586 | struct attribute *attr; |
0114d602 | 14587 | const char *name; |
134d01f1 | 14588 | |
348e048f DE |
14589 | /* If the definition of this type lives in .debug_types, read that type. |
14590 | Don't follow DW_AT_specification though, that will take us back up | |
14591 | the chain and we want to go down. */ | |
45e58e77 | 14592 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14593 | if (attr) |
14594 | { | |
ac9ec31b | 14595 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14596 | |
ac9ec31b | 14597 | /* The type's CU may not be the same as CU. |
02142a6c | 14598 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14599 | return set_die_type (die, type, cu); |
14600 | } | |
14601 | ||
c906108c SS |
14602 | type = alloc_type (objfile); |
14603 | ||
14604 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14605 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14606 | if (name != NULL) |
7d455152 | 14607 | TYPE_TAG_NAME (type) = name; |
c906108c | 14608 | |
0626fc76 TT |
14609 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14610 | if (attr != NULL) | |
14611 | { | |
14612 | struct type *underlying_type = die_type (die, cu); | |
14613 | ||
14614 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14615 | } | |
14616 | ||
e142c38c | 14617 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14618 | if (attr) |
14619 | { | |
14620 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14621 | } | |
14622 | else | |
14623 | { | |
14624 | TYPE_LENGTH (type) = 0; | |
14625 | } | |
14626 | ||
137033e9 JB |
14627 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14628 | declared as private in the package spec, and then defined only | |
14629 | inside the package body. Such types are known as Taft Amendment | |
14630 | Types. When another package uses such a type, an incomplete DIE | |
14631 | may be generated by the compiler. */ | |
02eb380e | 14632 | if (die_is_declaration (die, cu)) |
876cecd0 | 14633 | TYPE_STUB (type) = 1; |
02eb380e | 14634 | |
0626fc76 TT |
14635 | /* Finish the creation of this type by using the enum's children. |
14636 | We must call this even when the underlying type has been provided | |
14637 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14638 | update_enumeration_type_from_children (die, type, cu); |
14639 | ||
0626fc76 TT |
14640 | /* If this type has an underlying type that is not a stub, then we |
14641 | may use its attributes. We always use the "unsigned" attribute | |
14642 | in this situation, because ordinarily we guess whether the type | |
14643 | is unsigned -- but the guess can be wrong and the underlying type | |
14644 | can tell us the reality. However, we defer to a local size | |
14645 | attribute if one exists, because this lets the compiler override | |
14646 | the underlying type if needed. */ | |
14647 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14648 | { | |
14649 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14650 | if (TYPE_LENGTH (type) == 0) | |
14651 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14652 | } | |
14653 | ||
3d567982 TT |
14654 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14655 | ||
f792889a | 14656 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14657 | } |
14658 | ||
14659 | /* Given a pointer to a die which begins an enumeration, process all | |
14660 | the dies that define the members of the enumeration, and create the | |
14661 | symbol for the enumeration type. | |
14662 | ||
14663 | NOTE: We reverse the order of the element list. */ | |
14664 | ||
14665 | static void | |
14666 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14667 | { | |
f792889a | 14668 | struct type *this_type; |
134d01f1 | 14669 | |
f792889a DJ |
14670 | this_type = get_die_type (die, cu); |
14671 | if (this_type == NULL) | |
14672 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 14673 | |
639d11d3 | 14674 | if (die->child != NULL) |
c906108c | 14675 | { |
9dc481d3 DE |
14676 | struct die_info *child_die; |
14677 | struct symbol *sym; | |
14678 | struct field *fields = NULL; | |
14679 | int num_fields = 0; | |
15d034d0 | 14680 | const char *name; |
9dc481d3 | 14681 | |
639d11d3 | 14682 | child_die = die->child; |
c906108c SS |
14683 | while (child_die && child_die->tag) |
14684 | { | |
14685 | if (child_die->tag != DW_TAG_enumerator) | |
14686 | { | |
e7c27a73 | 14687 | process_die (child_die, cu); |
c906108c SS |
14688 | } |
14689 | else | |
14690 | { | |
39cbfefa DJ |
14691 | name = dwarf2_name (child_die, cu); |
14692 | if (name) | |
c906108c | 14693 | { |
f792889a | 14694 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
14695 | |
14696 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14697 | { | |
14698 | fields = (struct field *) | |
14699 | xrealloc (fields, | |
14700 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14701 | * sizeof (struct field)); |
c906108c SS |
14702 | } |
14703 | ||
3567439c | 14704 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 14705 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 14706 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
14707 | FIELD_BITSIZE (fields[num_fields]) = 0; |
14708 | ||
14709 | num_fields++; | |
14710 | } | |
14711 | } | |
14712 | ||
14713 | child_die = sibling_die (child_die); | |
14714 | } | |
14715 | ||
14716 | if (num_fields) | |
14717 | { | |
f792889a DJ |
14718 | TYPE_NFIELDS (this_type) = num_fields; |
14719 | TYPE_FIELDS (this_type) = (struct field *) | |
14720 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
14721 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 14722 | sizeof (struct field) * num_fields); |
b8c9b27d | 14723 | xfree (fields); |
c906108c | 14724 | } |
c906108c | 14725 | } |
134d01f1 | 14726 | |
6c83ed52 TT |
14727 | /* If we are reading an enum from a .debug_types unit, and the enum |
14728 | is a declaration, and the enum is not the signatured type in the | |
14729 | unit, then we do not want to add a symbol for it. Adding a | |
14730 | symbol would in some cases obscure the true definition of the | |
14731 | enum, giving users an incomplete type when the definition is | |
14732 | actually available. Note that we do not want to do this for all | |
14733 | enums which are just declarations, because C++0x allows forward | |
14734 | enum declarations. */ | |
3019eac3 | 14735 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
14736 | && die_is_declaration (die, cu)) |
14737 | { | |
52dc124a | 14738 | struct signatured_type *sig_type; |
6c83ed52 | 14739 | |
c0f78cd4 | 14740 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
14741 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
14742 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
14743 | return; |
14744 | } | |
14745 | ||
f792889a | 14746 | new_symbol (die, this_type, cu); |
c906108c SS |
14747 | } |
14748 | ||
14749 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
14750 | the DIE's type field. For now, this only handles one dimensional | |
14751 | arrays. */ | |
14752 | ||
f792889a | 14753 | static struct type * |
e7c27a73 | 14754 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14755 | { |
e7c27a73 | 14756 | struct objfile *objfile = cu->objfile; |
c906108c | 14757 | struct die_info *child_die; |
7e314c57 | 14758 | struct type *type; |
c906108c | 14759 | struct type *element_type, *range_type, *index_type; |
c906108c | 14760 | struct attribute *attr; |
15d034d0 | 14761 | const char *name; |
dc53a7ad | 14762 | unsigned int bit_stride = 0; |
c906108c | 14763 | |
e7c27a73 | 14764 | element_type = die_type (die, cu); |
c906108c | 14765 | |
7e314c57 JK |
14766 | /* The die_type call above may have already set the type for this DIE. */ |
14767 | type = get_die_type (die, cu); | |
14768 | if (type) | |
14769 | return type; | |
14770 | ||
dc53a7ad JB |
14771 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
14772 | if (attr != NULL) | |
14773 | bit_stride = DW_UNSND (attr) * 8; | |
14774 | ||
14775 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
14776 | if (attr != NULL) | |
14777 | bit_stride = DW_UNSND (attr); | |
14778 | ||
c906108c SS |
14779 | /* Irix 6.2 native cc creates array types without children for |
14780 | arrays with unspecified length. */ | |
639d11d3 | 14781 | if (die->child == NULL) |
c906108c | 14782 | { |
46bf5051 | 14783 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14784 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
14785 | type = create_array_type_with_stride (NULL, element_type, range_type, |
14786 | bit_stride); | |
f792889a | 14787 | return set_die_type (die, type, cu); |
c906108c SS |
14788 | } |
14789 | ||
791afaa2 | 14790 | std::vector<struct type *> range_types; |
639d11d3 | 14791 | child_die = die->child; |
c906108c SS |
14792 | while (child_die && child_die->tag) |
14793 | { | |
14794 | if (child_die->tag == DW_TAG_subrange_type) | |
14795 | { | |
f792889a | 14796 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 14797 | |
f792889a | 14798 | if (child_type != NULL) |
a02abb62 | 14799 | { |
0963b4bd MS |
14800 | /* The range type was succesfully read. Save it for the |
14801 | array type creation. */ | |
791afaa2 | 14802 | range_types.push_back (child_type); |
a02abb62 | 14803 | } |
c906108c SS |
14804 | } |
14805 | child_die = sibling_die (child_die); | |
14806 | } | |
14807 | ||
14808 | /* Dwarf2 dimensions are output from left to right, create the | |
14809 | necessary array types in backwards order. */ | |
7ca2d3a3 | 14810 | |
c906108c | 14811 | type = element_type; |
7ca2d3a3 DL |
14812 | |
14813 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
14814 | { | |
14815 | int i = 0; | |
9a619af0 | 14816 | |
791afaa2 | 14817 | while (i < range_types.size ()) |
dc53a7ad JB |
14818 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
14819 | bit_stride); | |
7ca2d3a3 DL |
14820 | } |
14821 | else | |
14822 | { | |
791afaa2 | 14823 | size_t ndim = range_types.size (); |
7ca2d3a3 | 14824 | while (ndim-- > 0) |
dc53a7ad JB |
14825 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
14826 | bit_stride); | |
7ca2d3a3 | 14827 | } |
c906108c | 14828 | |
f5f8a009 EZ |
14829 | /* Understand Dwarf2 support for vector types (like they occur on |
14830 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
14831 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
14832 | custom vendor extension. The main difference between a regular | |
14833 | array and the vector variant is that vectors are passed by value | |
14834 | to functions. */ | |
e142c38c | 14835 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 14836 | if (attr) |
ea37ba09 | 14837 | make_vector_type (type); |
f5f8a009 | 14838 | |
dbc98a8b KW |
14839 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
14840 | implementation may choose to implement triple vectors using this | |
14841 | attribute. */ | |
14842 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
14843 | if (attr) | |
14844 | { | |
14845 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
14846 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14847 | else | |
3e43a32a MS |
14848 | complaint (&symfile_complaints, |
14849 | _("DW_AT_byte_size for array type smaller " | |
14850 | "than the total size of elements")); | |
dbc98a8b KW |
14851 | } |
14852 | ||
39cbfefa DJ |
14853 | name = dwarf2_name (die, cu); |
14854 | if (name) | |
14855 | TYPE_NAME (type) = name; | |
6e70227d | 14856 | |
0963b4bd | 14857 | /* Install the type in the die. */ |
7e314c57 JK |
14858 | set_die_type (die, type, cu); |
14859 | ||
14860 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14861 | set_descriptive_type (type, die, cu); |
14862 | ||
7e314c57 | 14863 | return type; |
c906108c SS |
14864 | } |
14865 | ||
7ca2d3a3 | 14866 | static enum dwarf_array_dim_ordering |
6e70227d | 14867 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
14868 | { |
14869 | struct attribute *attr; | |
14870 | ||
14871 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
14872 | ||
aead7601 SM |
14873 | if (attr) |
14874 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 14875 | |
0963b4bd MS |
14876 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
14877 | opposite order to the dwarf2 specification, but data is still | |
14878 | laid out as per normal fortran. | |
7ca2d3a3 | 14879 | |
0963b4bd MS |
14880 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
14881 | version checking. */ | |
7ca2d3a3 | 14882 | |
905e0470 PM |
14883 | if (cu->language == language_fortran |
14884 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
14885 | { |
14886 | return DW_ORD_row_major; | |
14887 | } | |
14888 | ||
6e70227d | 14889 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
14890 | { |
14891 | case array_column_major: | |
14892 | return DW_ORD_col_major; | |
14893 | case array_row_major: | |
14894 | default: | |
14895 | return DW_ORD_row_major; | |
14896 | }; | |
14897 | } | |
14898 | ||
72019c9c | 14899 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 14900 | the DIE's type field. */ |
72019c9c | 14901 | |
f792889a | 14902 | static struct type * |
72019c9c GM |
14903 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
14904 | { | |
7e314c57 JK |
14905 | struct type *domain_type, *set_type; |
14906 | struct attribute *attr; | |
f792889a | 14907 | |
7e314c57 JK |
14908 | domain_type = die_type (die, cu); |
14909 | ||
14910 | /* The die_type call above may have already set the type for this DIE. */ | |
14911 | set_type = get_die_type (die, cu); | |
14912 | if (set_type) | |
14913 | return set_type; | |
14914 | ||
14915 | set_type = create_set_type (NULL, domain_type); | |
14916 | ||
14917 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
14918 | if (attr) |
14919 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 14920 | |
f792889a | 14921 | return set_die_type (die, set_type, cu); |
72019c9c | 14922 | } |
7ca2d3a3 | 14923 | |
0971de02 TT |
14924 | /* A helper for read_common_block that creates a locexpr baton. |
14925 | SYM is the symbol which we are marking as computed. | |
14926 | COMMON_DIE is the DIE for the common block. | |
14927 | COMMON_LOC is the location expression attribute for the common | |
14928 | block itself. | |
14929 | MEMBER_LOC is the location expression attribute for the particular | |
14930 | member of the common block that we are processing. | |
14931 | CU is the CU from which the above come. */ | |
14932 | ||
14933 | static void | |
14934 | mark_common_block_symbol_computed (struct symbol *sym, | |
14935 | struct die_info *common_die, | |
14936 | struct attribute *common_loc, | |
14937 | struct attribute *member_loc, | |
14938 | struct dwarf2_cu *cu) | |
14939 | { | |
14940 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14941 | struct dwarf2_locexpr_baton *baton; | |
14942 | gdb_byte *ptr; | |
14943 | unsigned int cu_off; | |
14944 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
14945 | LONGEST offset = 0; | |
14946 | ||
14947 | gdb_assert (common_loc && member_loc); | |
14948 | gdb_assert (attr_form_is_block (common_loc)); | |
14949 | gdb_assert (attr_form_is_block (member_loc) | |
14950 | || attr_form_is_constant (member_loc)); | |
14951 | ||
8d749320 | 14952 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
14953 | baton->per_cu = cu->per_cu; |
14954 | gdb_assert (baton->per_cu); | |
14955 | ||
14956 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
14957 | ||
14958 | if (attr_form_is_constant (member_loc)) | |
14959 | { | |
14960 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
14961 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
14962 | } | |
14963 | else | |
14964 | baton->size += DW_BLOCK (member_loc)->size; | |
14965 | ||
224c3ddb | 14966 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
14967 | baton->data = ptr; |
14968 | ||
14969 | *ptr++ = DW_OP_call4; | |
9c541725 | 14970 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
14971 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
14972 | ptr += 4; | |
14973 | ||
14974 | if (attr_form_is_constant (member_loc)) | |
14975 | { | |
14976 | *ptr++ = DW_OP_addr; | |
14977 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
14978 | ptr += cu->header.addr_size; | |
14979 | } | |
14980 | else | |
14981 | { | |
14982 | /* We have to copy the data here, because DW_OP_call4 will only | |
14983 | use a DW_AT_location attribute. */ | |
14984 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
14985 | ptr += DW_BLOCK (member_loc)->size; | |
14986 | } | |
14987 | ||
14988 | *ptr++ = DW_OP_plus; | |
14989 | gdb_assert (ptr - baton->data == baton->size); | |
14990 | ||
0971de02 | 14991 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 14992 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
14993 | } |
14994 | ||
4357ac6c TT |
14995 | /* Create appropriate locally-scoped variables for all the |
14996 | DW_TAG_common_block entries. Also create a struct common_block | |
14997 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
14998 | is used to sepate the common blocks name namespace from regular | |
14999 | variable names. */ | |
c906108c SS |
15000 | |
15001 | static void | |
e7c27a73 | 15002 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15003 | { |
0971de02 TT |
15004 | struct attribute *attr; |
15005 | ||
15006 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
15007 | if (attr) | |
15008 | { | |
15009 | /* Support the .debug_loc offsets. */ | |
15010 | if (attr_form_is_block (attr)) | |
15011 | { | |
15012 | /* Ok. */ | |
15013 | } | |
15014 | else if (attr_form_is_section_offset (attr)) | |
15015 | { | |
15016 | dwarf2_complex_location_expr_complaint (); | |
15017 | attr = NULL; | |
15018 | } | |
15019 | else | |
15020 | { | |
15021 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15022 | "common block member"); | |
15023 | attr = NULL; | |
15024 | } | |
15025 | } | |
15026 | ||
639d11d3 | 15027 | if (die->child != NULL) |
c906108c | 15028 | { |
4357ac6c TT |
15029 | struct objfile *objfile = cu->objfile; |
15030 | struct die_info *child_die; | |
15031 | size_t n_entries = 0, size; | |
15032 | struct common_block *common_block; | |
15033 | struct symbol *sym; | |
74ac6d43 | 15034 | |
4357ac6c TT |
15035 | for (child_die = die->child; |
15036 | child_die && child_die->tag; | |
15037 | child_die = sibling_die (child_die)) | |
15038 | ++n_entries; | |
15039 | ||
15040 | size = (sizeof (struct common_block) | |
15041 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
15042 | common_block |
15043 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
15044 | size); | |
4357ac6c TT |
15045 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
15046 | common_block->n_entries = 0; | |
15047 | ||
15048 | for (child_die = die->child; | |
15049 | child_die && child_die->tag; | |
15050 | child_die = sibling_die (child_die)) | |
15051 | { | |
15052 | /* Create the symbol in the DW_TAG_common_block block in the current | |
15053 | symbol scope. */ | |
e7c27a73 | 15054 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
15055 | if (sym != NULL) |
15056 | { | |
15057 | struct attribute *member_loc; | |
15058 | ||
15059 | common_block->contents[common_block->n_entries++] = sym; | |
15060 | ||
15061 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
15062 | cu); | |
15063 | if (member_loc) | |
15064 | { | |
15065 | /* GDB has handled this for a long time, but it is | |
15066 | not specified by DWARF. It seems to have been | |
15067 | emitted by gfortran at least as recently as: | |
15068 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
15069 | complaint (&symfile_complaints, | |
15070 | _("Variable in common block has " | |
15071 | "DW_AT_data_member_location " | |
15072 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15073 | to_underlying (child_die->sect_off), |
4262abfb | 15074 | objfile_name (cu->objfile)); |
0971de02 TT |
15075 | |
15076 | if (attr_form_is_section_offset (member_loc)) | |
15077 | dwarf2_complex_location_expr_complaint (); | |
15078 | else if (attr_form_is_constant (member_loc) | |
15079 | || attr_form_is_block (member_loc)) | |
15080 | { | |
15081 | if (attr) | |
15082 | mark_common_block_symbol_computed (sym, die, attr, | |
15083 | member_loc, cu); | |
15084 | } | |
15085 | else | |
15086 | dwarf2_complex_location_expr_complaint (); | |
15087 | } | |
15088 | } | |
c906108c | 15089 | } |
4357ac6c TT |
15090 | |
15091 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
15092 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
15093 | } |
15094 | } | |
15095 | ||
0114d602 | 15096 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 15097 | |
0114d602 DJ |
15098 | static struct type * |
15099 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 15100 | { |
e7c27a73 | 15101 | struct objfile *objfile = cu->objfile; |
0114d602 | 15102 | const char *previous_prefix, *name; |
9219021c | 15103 | int is_anonymous; |
0114d602 DJ |
15104 | struct type *type; |
15105 | ||
15106 | /* For extensions, reuse the type of the original namespace. */ | |
15107 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
15108 | { | |
15109 | struct die_info *ext_die; | |
15110 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 15111 | |
0114d602 DJ |
15112 | ext_die = dwarf2_extension (die, &ext_cu); |
15113 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
15114 | |
15115 | /* EXT_CU may not be the same as CU. | |
02142a6c | 15116 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
15117 | return set_die_type (die, type, cu); |
15118 | } | |
9219021c | 15119 | |
e142c38c | 15120 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
15121 | |
15122 | /* Now build the name of the current namespace. */ | |
15123 | ||
0114d602 DJ |
15124 | previous_prefix = determine_prefix (die, cu); |
15125 | if (previous_prefix[0] != '\0') | |
15126 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 15127 | previous_prefix, name, 0, cu); |
0114d602 DJ |
15128 | |
15129 | /* Create the type. */ | |
19f392bc | 15130 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
15131 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
15132 | ||
60531b24 | 15133 | return set_die_type (die, type, cu); |
0114d602 DJ |
15134 | } |
15135 | ||
22cee43f | 15136 | /* Read a namespace scope. */ |
0114d602 DJ |
15137 | |
15138 | static void | |
15139 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
15140 | { | |
15141 | struct objfile *objfile = cu->objfile; | |
0114d602 | 15142 | int is_anonymous; |
9219021c | 15143 | |
5c4e30ca DC |
15144 | /* Add a symbol associated to this if we haven't seen the namespace |
15145 | before. Also, add a using directive if it's an anonymous | |
15146 | namespace. */ | |
9219021c | 15147 | |
f2f0e013 | 15148 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
15149 | { |
15150 | struct type *type; | |
15151 | ||
0114d602 | 15152 | type = read_type_die (die, cu); |
e7c27a73 | 15153 | new_symbol (die, type, cu); |
5c4e30ca | 15154 | |
e8e80198 | 15155 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 15156 | if (is_anonymous) |
0114d602 DJ |
15157 | { |
15158 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 15159 | |
eb1e02fd | 15160 | std::vector<const char *> excludes; |
22cee43f PMR |
15161 | add_using_directive (using_directives (cu->language), |
15162 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 15163 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 15164 | } |
5c4e30ca | 15165 | } |
9219021c | 15166 | |
639d11d3 | 15167 | if (die->child != NULL) |
d9fa45fe | 15168 | { |
639d11d3 | 15169 | struct die_info *child_die = die->child; |
6e70227d | 15170 | |
d9fa45fe DC |
15171 | while (child_die && child_die->tag) |
15172 | { | |
e7c27a73 | 15173 | process_die (child_die, cu); |
d9fa45fe DC |
15174 | child_die = sibling_die (child_die); |
15175 | } | |
15176 | } | |
38d518c9 EZ |
15177 | } |
15178 | ||
f55ee35c JK |
15179 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
15180 | imported module. Still we need that type as local Fortran "use ... only" | |
15181 | declaration imports depend on the created type in determine_prefix. */ | |
15182 | ||
15183 | static struct type * | |
15184 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
15185 | { | |
15186 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 15187 | const char *module_name; |
f55ee35c JK |
15188 | struct type *type; |
15189 | ||
15190 | module_name = dwarf2_name (die, cu); | |
15191 | if (!module_name) | |
3e43a32a MS |
15192 | complaint (&symfile_complaints, |
15193 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 15194 | to_underlying (die->sect_off)); |
19f392bc | 15195 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
15196 | |
15197 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
15198 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
15199 | ||
15200 | return set_die_type (die, type, cu); | |
15201 | } | |
15202 | ||
5d7cb8df JK |
15203 | /* Read a Fortran module. */ |
15204 | ||
15205 | static void | |
15206 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
15207 | { | |
15208 | struct die_info *child_die = die->child; | |
530e8392 KB |
15209 | struct type *type; |
15210 | ||
15211 | type = read_type_die (die, cu); | |
15212 | new_symbol (die, type, cu); | |
5d7cb8df | 15213 | |
5d7cb8df JK |
15214 | while (child_die && child_die->tag) |
15215 | { | |
15216 | process_die (child_die, cu); | |
15217 | child_die = sibling_die (child_die); | |
15218 | } | |
15219 | } | |
15220 | ||
38d518c9 EZ |
15221 | /* Return the name of the namespace represented by DIE. Set |
15222 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
15223 | namespace. */ | |
15224 | ||
15225 | static const char * | |
e142c38c | 15226 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
15227 | { |
15228 | struct die_info *current_die; | |
15229 | const char *name = NULL; | |
15230 | ||
15231 | /* Loop through the extensions until we find a name. */ | |
15232 | ||
15233 | for (current_die = die; | |
15234 | current_die != NULL; | |
f2f0e013 | 15235 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 15236 | { |
96553a0c DE |
15237 | /* We don't use dwarf2_name here so that we can detect the absence |
15238 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 15239 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 15240 | |
38d518c9 EZ |
15241 | if (name != NULL) |
15242 | break; | |
15243 | } | |
15244 | ||
15245 | /* Is it an anonymous namespace? */ | |
15246 | ||
15247 | *is_anonymous = (name == NULL); | |
15248 | if (*is_anonymous) | |
2b1dbab0 | 15249 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
15250 | |
15251 | return name; | |
d9fa45fe DC |
15252 | } |
15253 | ||
c906108c SS |
15254 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
15255 | the user defined type vector. */ | |
15256 | ||
f792889a | 15257 | static struct type * |
e7c27a73 | 15258 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15259 | { |
5e2b427d | 15260 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 15261 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 15262 | struct type *type; |
8b2dbe47 KB |
15263 | struct attribute *attr_byte_size; |
15264 | struct attribute *attr_address_class; | |
15265 | int byte_size, addr_class; | |
7e314c57 JK |
15266 | struct type *target_type; |
15267 | ||
15268 | target_type = die_type (die, cu); | |
c906108c | 15269 | |
7e314c57 JK |
15270 | /* The die_type call above may have already set the type for this DIE. */ |
15271 | type = get_die_type (die, cu); | |
15272 | if (type) | |
15273 | return type; | |
15274 | ||
15275 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 15276 | |
e142c38c | 15277 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
15278 | if (attr_byte_size) |
15279 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 15280 | else |
8b2dbe47 KB |
15281 | byte_size = cu_header->addr_size; |
15282 | ||
e142c38c | 15283 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
15284 | if (attr_address_class) |
15285 | addr_class = DW_UNSND (attr_address_class); | |
15286 | else | |
15287 | addr_class = DW_ADDR_none; | |
15288 | ||
15289 | /* If the pointer size or address class is different than the | |
15290 | default, create a type variant marked as such and set the | |
15291 | length accordingly. */ | |
15292 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 15293 | { |
5e2b427d | 15294 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
15295 | { |
15296 | int type_flags; | |
15297 | ||
849957d9 | 15298 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 15299 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
15300 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
15301 | == 0); | |
8b2dbe47 KB |
15302 | type = make_type_with_address_space (type, type_flags); |
15303 | } | |
15304 | else if (TYPE_LENGTH (type) != byte_size) | |
15305 | { | |
3e43a32a MS |
15306 | complaint (&symfile_complaints, |
15307 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 15308 | } |
6e70227d | 15309 | else |
9a619af0 MS |
15310 | { |
15311 | /* Should we also complain about unhandled address classes? */ | |
15312 | } | |
c906108c | 15313 | } |
8b2dbe47 KB |
15314 | |
15315 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 15316 | return set_die_type (die, type, cu); |
c906108c SS |
15317 | } |
15318 | ||
15319 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
15320 | the user defined type vector. */ | |
15321 | ||
f792889a | 15322 | static struct type * |
e7c27a73 | 15323 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
15324 | { |
15325 | struct type *type; | |
15326 | struct type *to_type; | |
15327 | struct type *domain; | |
15328 | ||
e7c27a73 DJ |
15329 | to_type = die_type (die, cu); |
15330 | domain = die_containing_type (die, cu); | |
0d5de010 | 15331 | |
7e314c57 JK |
15332 | /* The calls above may have already set the type for this DIE. */ |
15333 | type = get_die_type (die, cu); | |
15334 | if (type) | |
15335 | return type; | |
15336 | ||
0d5de010 DJ |
15337 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
15338 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
15339 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
15340 | { | |
15341 | struct type *new_type = alloc_type (cu->objfile); | |
15342 | ||
15343 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
15344 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
15345 | TYPE_VARARGS (to_type)); | |
15346 | type = lookup_methodptr_type (new_type); | |
15347 | } | |
0d5de010 DJ |
15348 | else |
15349 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 15350 | |
f792889a | 15351 | return set_die_type (die, type, cu); |
c906108c SS |
15352 | } |
15353 | ||
4297a3f0 | 15354 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
15355 | the user defined type vector. */ |
15356 | ||
f792889a | 15357 | static struct type * |
4297a3f0 AV |
15358 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
15359 | enum type_code refcode) | |
c906108c | 15360 | { |
e7c27a73 | 15361 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 15362 | struct type *type, *target_type; |
c906108c SS |
15363 | struct attribute *attr; |
15364 | ||
4297a3f0 AV |
15365 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
15366 | ||
7e314c57 JK |
15367 | target_type = die_type (die, cu); |
15368 | ||
15369 | /* The die_type call above may have already set the type for this DIE. */ | |
15370 | type = get_die_type (die, cu); | |
15371 | if (type) | |
15372 | return type; | |
15373 | ||
4297a3f0 | 15374 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 15375 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15376 | if (attr) |
15377 | { | |
15378 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15379 | } | |
15380 | else | |
15381 | { | |
107d2387 | 15382 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 15383 | } |
f792889a | 15384 | return set_die_type (die, type, cu); |
c906108c SS |
15385 | } |
15386 | ||
cf363f18 MW |
15387 | /* Add the given cv-qualifiers to the element type of the array. GCC |
15388 | outputs DWARF type qualifiers that apply to an array, not the | |
15389 | element type. But GDB relies on the array element type to carry | |
15390 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
15391 | specification. */ | |
15392 | ||
15393 | static struct type * | |
15394 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
15395 | struct type *base_type, int cnst, int voltl) | |
15396 | { | |
15397 | struct type *el_type, *inner_array; | |
15398 | ||
15399 | base_type = copy_type (base_type); | |
15400 | inner_array = base_type; | |
15401 | ||
15402 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
15403 | { | |
15404 | TYPE_TARGET_TYPE (inner_array) = | |
15405 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
15406 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
15407 | } | |
15408 | ||
15409 | el_type = TYPE_TARGET_TYPE (inner_array); | |
15410 | cnst |= TYPE_CONST (el_type); | |
15411 | voltl |= TYPE_VOLATILE (el_type); | |
15412 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
15413 | ||
15414 | return set_die_type (die, base_type, cu); | |
15415 | } | |
15416 | ||
f792889a | 15417 | static struct type * |
e7c27a73 | 15418 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15419 | { |
f792889a | 15420 | struct type *base_type, *cv_type; |
c906108c | 15421 | |
e7c27a73 | 15422 | base_type = die_type (die, cu); |
7e314c57 JK |
15423 | |
15424 | /* The die_type call above may have already set the type for this DIE. */ | |
15425 | cv_type = get_die_type (die, cu); | |
15426 | if (cv_type) | |
15427 | return cv_type; | |
15428 | ||
2f608a3a KW |
15429 | /* In case the const qualifier is applied to an array type, the element type |
15430 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
15431 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 15432 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 15433 | |
f792889a DJ |
15434 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
15435 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15436 | } |
15437 | ||
f792889a | 15438 | static struct type * |
e7c27a73 | 15439 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15440 | { |
f792889a | 15441 | struct type *base_type, *cv_type; |
c906108c | 15442 | |
e7c27a73 | 15443 | base_type = die_type (die, cu); |
7e314c57 JK |
15444 | |
15445 | /* The die_type call above may have already set the type for this DIE. */ | |
15446 | cv_type = get_die_type (die, cu); | |
15447 | if (cv_type) | |
15448 | return cv_type; | |
15449 | ||
cf363f18 MW |
15450 | /* In case the volatile qualifier is applied to an array type, the |
15451 | element type is so qualified, not the array type (section 6.7.3 | |
15452 | of C99). */ | |
15453 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
15454 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
15455 | ||
f792889a DJ |
15456 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
15457 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15458 | } |
15459 | ||
06d66ee9 TT |
15460 | /* Handle DW_TAG_restrict_type. */ |
15461 | ||
15462 | static struct type * | |
15463 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
15464 | { | |
15465 | struct type *base_type, *cv_type; | |
15466 | ||
15467 | base_type = die_type (die, cu); | |
15468 | ||
15469 | /* The die_type call above may have already set the type for this DIE. */ | |
15470 | cv_type = get_die_type (die, cu); | |
15471 | if (cv_type) | |
15472 | return cv_type; | |
15473 | ||
15474 | cv_type = make_restrict_type (base_type); | |
15475 | return set_die_type (die, cv_type, cu); | |
15476 | } | |
15477 | ||
a2c2acaf MW |
15478 | /* Handle DW_TAG_atomic_type. */ |
15479 | ||
15480 | static struct type * | |
15481 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
15482 | { | |
15483 | struct type *base_type, *cv_type; | |
15484 | ||
15485 | base_type = die_type (die, cu); | |
15486 | ||
15487 | /* The die_type call above may have already set the type for this DIE. */ | |
15488 | cv_type = get_die_type (die, cu); | |
15489 | if (cv_type) | |
15490 | return cv_type; | |
15491 | ||
15492 | cv_type = make_atomic_type (base_type); | |
15493 | return set_die_type (die, cv_type, cu); | |
15494 | } | |
15495 | ||
c906108c SS |
15496 | /* Extract all information from a DW_TAG_string_type DIE and add to |
15497 | the user defined type vector. It isn't really a user defined type, | |
15498 | but it behaves like one, with other DIE's using an AT_user_def_type | |
15499 | attribute to reference it. */ | |
15500 | ||
f792889a | 15501 | static struct type * |
e7c27a73 | 15502 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15503 | { |
e7c27a73 | 15504 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 15505 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15506 | struct type *type, *range_type, *index_type, *char_type; |
15507 | struct attribute *attr; | |
15508 | unsigned int length; | |
15509 | ||
e142c38c | 15510 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
15511 | if (attr) |
15512 | { | |
15513 | length = DW_UNSND (attr); | |
15514 | } | |
15515 | else | |
15516 | { | |
0963b4bd | 15517 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 15518 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
15519 | if (attr) |
15520 | { | |
15521 | length = DW_UNSND (attr); | |
15522 | } | |
15523 | else | |
15524 | { | |
15525 | length = 1; | |
15526 | } | |
c906108c | 15527 | } |
6ccb9162 | 15528 | |
46bf5051 | 15529 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15530 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
15531 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
15532 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 15533 | |
f792889a | 15534 | return set_die_type (die, type, cu); |
c906108c SS |
15535 | } |
15536 | ||
4d804846 JB |
15537 | /* Assuming that DIE corresponds to a function, returns nonzero |
15538 | if the function is prototyped. */ | |
15539 | ||
15540 | static int | |
15541 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
15542 | { | |
15543 | struct attribute *attr; | |
15544 | ||
15545 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
15546 | if (attr && (DW_UNSND (attr) != 0)) | |
15547 | return 1; | |
15548 | ||
15549 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
15550 | is only meaninful for C, but the concept also extends to other | |
15551 | languages that allow unprototyped functions (Eg: Objective C). | |
15552 | For all other languages, assume that functions are always | |
15553 | prototyped. */ | |
15554 | if (cu->language != language_c | |
15555 | && cu->language != language_objc | |
15556 | && cu->language != language_opencl) | |
15557 | return 1; | |
15558 | ||
15559 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
15560 | prototyped and unprototyped functions; default to prototyped, | |
15561 | since that is more common in modern code (and RealView warns | |
15562 | about unprototyped functions). */ | |
15563 | if (producer_is_realview (cu->producer)) | |
15564 | return 1; | |
15565 | ||
15566 | return 0; | |
15567 | } | |
15568 | ||
c906108c SS |
15569 | /* Handle DIES due to C code like: |
15570 | ||
15571 | struct foo | |
c5aa993b JM |
15572 | { |
15573 | int (*funcp)(int a, long l); | |
15574 | int b; | |
15575 | }; | |
c906108c | 15576 | |
0963b4bd | 15577 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 15578 | |
f792889a | 15579 | static struct type * |
e7c27a73 | 15580 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15581 | { |
bb5ed363 | 15582 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
15583 | struct type *type; /* Type that this function returns. */ |
15584 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
15585 | struct attribute *attr; |
15586 | ||
e7c27a73 | 15587 | type = die_type (die, cu); |
7e314c57 JK |
15588 | |
15589 | /* The die_type call above may have already set the type for this DIE. */ | |
15590 | ftype = get_die_type (die, cu); | |
15591 | if (ftype) | |
15592 | return ftype; | |
15593 | ||
0c8b41f1 | 15594 | ftype = lookup_function_type (type); |
c906108c | 15595 | |
4d804846 | 15596 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15597 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15598 | |
c055b101 CV |
15599 | /* Store the calling convention in the type if it's available in |
15600 | the subroutine die. Otherwise set the calling convention to | |
15601 | the default value DW_CC_normal. */ | |
15602 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15603 | if (attr) |
15604 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15605 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15606 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15607 | else | |
15608 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15609 | |
743649fd MW |
15610 | /* Record whether the function returns normally to its caller or not |
15611 | if the DWARF producer set that information. */ | |
15612 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15613 | if (attr && (DW_UNSND (attr) != 0)) | |
15614 | TYPE_NO_RETURN (ftype) = 1; | |
15615 | ||
76c10ea2 GM |
15616 | /* We need to add the subroutine type to the die immediately so |
15617 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15618 | declared as the same subroutine type. */ |
76c10ea2 | 15619 | set_die_type (die, ftype, cu); |
6e70227d | 15620 | |
639d11d3 | 15621 | if (die->child != NULL) |
c906108c | 15622 | { |
bb5ed363 | 15623 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15624 | struct die_info *child_die; |
8072405b | 15625 | int nparams, iparams; |
c906108c SS |
15626 | |
15627 | /* Count the number of parameters. | |
15628 | FIXME: GDB currently ignores vararg functions, but knows about | |
15629 | vararg member functions. */ | |
8072405b | 15630 | nparams = 0; |
639d11d3 | 15631 | child_die = die->child; |
c906108c SS |
15632 | while (child_die && child_die->tag) |
15633 | { | |
15634 | if (child_die->tag == DW_TAG_formal_parameter) | |
15635 | nparams++; | |
15636 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15637 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15638 | child_die = sibling_die (child_die); |
15639 | } | |
15640 | ||
15641 | /* Allocate storage for parameters and fill them in. */ | |
15642 | TYPE_NFIELDS (ftype) = nparams; | |
15643 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15644 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15645 | |
8072405b JK |
15646 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15647 | even if we error out during the parameters reading below. */ | |
15648 | for (iparams = 0; iparams < nparams; iparams++) | |
15649 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15650 | ||
15651 | iparams = 0; | |
639d11d3 | 15652 | child_die = die->child; |
c906108c SS |
15653 | while (child_die && child_die->tag) |
15654 | { | |
15655 | if (child_die->tag == DW_TAG_formal_parameter) | |
15656 | { | |
3ce3b1ba PA |
15657 | struct type *arg_type; |
15658 | ||
15659 | /* DWARF version 2 has no clean way to discern C++ | |
15660 | static and non-static member functions. G++ helps | |
15661 | GDB by marking the first parameter for non-static | |
15662 | member functions (which is the this pointer) as | |
15663 | artificial. We pass this information to | |
15664 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15665 | ||
15666 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15667 | 4.5 does not yet generate. */ | |
e142c38c | 15668 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15669 | if (attr) |
15670 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
15671 | else | |
9c37b5ae | 15672 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
15673 | arg_type = die_type (child_die, cu); |
15674 | ||
15675 | /* RealView does not mark THIS as const, which the testsuite | |
15676 | expects. GCC marks THIS as const in method definitions, | |
15677 | but not in the class specifications (GCC PR 43053). */ | |
15678 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
15679 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
15680 | { | |
15681 | int is_this = 0; | |
15682 | struct dwarf2_cu *arg_cu = cu; | |
15683 | const char *name = dwarf2_name (child_die, cu); | |
15684 | ||
15685 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
15686 | if (attr) | |
15687 | { | |
15688 | /* If the compiler emits this, use it. */ | |
15689 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
15690 | is_this = 1; | |
15691 | } | |
15692 | else if (name && strcmp (name, "this") == 0) | |
15693 | /* Function definitions will have the argument names. */ | |
15694 | is_this = 1; | |
15695 | else if (name == NULL && iparams == 0) | |
15696 | /* Declarations may not have the names, so like | |
15697 | elsewhere in GDB, assume an artificial first | |
15698 | argument is "this". */ | |
15699 | is_this = 1; | |
15700 | ||
15701 | if (is_this) | |
15702 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
15703 | arg_type, 0); | |
15704 | } | |
15705 | ||
15706 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
15707 | iparams++; |
15708 | } | |
15709 | child_die = sibling_die (child_die); | |
15710 | } | |
15711 | } | |
15712 | ||
76c10ea2 | 15713 | return ftype; |
c906108c SS |
15714 | } |
15715 | ||
f792889a | 15716 | static struct type * |
e7c27a73 | 15717 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15718 | { |
e7c27a73 | 15719 | struct objfile *objfile = cu->objfile; |
0114d602 | 15720 | const char *name = NULL; |
3c8e0968 | 15721 | struct type *this_type, *target_type; |
c906108c | 15722 | |
94af9270 | 15723 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
15724 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
15725 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 15726 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
15727 | target_type = die_type (die, cu); |
15728 | if (target_type != this_type) | |
15729 | TYPE_TARGET_TYPE (this_type) = target_type; | |
15730 | else | |
15731 | { | |
15732 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
15733 | spec and cause infinite loops in GDB. */ | |
15734 | complaint (&symfile_complaints, | |
15735 | _("Self-referential DW_TAG_typedef " | |
15736 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15737 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
15738 | TYPE_TARGET_TYPE (this_type) = NULL; |
15739 | } | |
f792889a | 15740 | return this_type; |
c906108c SS |
15741 | } |
15742 | ||
9b790ce7 UW |
15743 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
15744 | (which may be different from NAME) to the architecture back-end to allow | |
15745 | it to guess the correct format if necessary. */ | |
15746 | ||
15747 | static struct type * | |
15748 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
15749 | const char *name_hint) | |
15750 | { | |
15751 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15752 | const struct floatformat **format; | |
15753 | struct type *type; | |
15754 | ||
15755 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
15756 | if (format) | |
15757 | type = init_float_type (objfile, bits, name, format); | |
15758 | else | |
77b7c781 | 15759 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
15760 | |
15761 | return type; | |
15762 | } | |
15763 | ||
c906108c SS |
15764 | /* Find a representation of a given base type and install |
15765 | it in the TYPE field of the die. */ | |
15766 | ||
f792889a | 15767 | static struct type * |
e7c27a73 | 15768 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15769 | { |
e7c27a73 | 15770 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15771 | struct type *type; |
15772 | struct attribute *attr; | |
19f392bc | 15773 | int encoding = 0, bits = 0; |
15d034d0 | 15774 | const char *name; |
c906108c | 15775 | |
e142c38c | 15776 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
15777 | if (attr) |
15778 | { | |
15779 | encoding = DW_UNSND (attr); | |
15780 | } | |
e142c38c | 15781 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15782 | if (attr) |
15783 | { | |
19f392bc | 15784 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 15785 | } |
39cbfefa | 15786 | name = dwarf2_name (die, cu); |
6ccb9162 | 15787 | if (!name) |
c906108c | 15788 | { |
6ccb9162 UW |
15789 | complaint (&symfile_complaints, |
15790 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 15791 | } |
6ccb9162 UW |
15792 | |
15793 | switch (encoding) | |
c906108c | 15794 | { |
6ccb9162 UW |
15795 | case DW_ATE_address: |
15796 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 15797 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 15798 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
15799 | break; |
15800 | case DW_ATE_boolean: | |
19f392bc | 15801 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
15802 | break; |
15803 | case DW_ATE_complex_float: | |
9b790ce7 | 15804 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 15805 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
15806 | break; |
15807 | case DW_ATE_decimal_float: | |
19f392bc | 15808 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
15809 | break; |
15810 | case DW_ATE_float: | |
9b790ce7 | 15811 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
15812 | break; |
15813 | case DW_ATE_signed: | |
19f392bc | 15814 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
15815 | break; |
15816 | case DW_ATE_unsigned: | |
3b2b8fea TT |
15817 | if (cu->language == language_fortran |
15818 | && name | |
61012eef | 15819 | && startswith (name, "character(")) |
19f392bc UW |
15820 | type = init_character_type (objfile, bits, 1, name); |
15821 | else | |
15822 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
15823 | break; |
15824 | case DW_ATE_signed_char: | |
6e70227d | 15825 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
15826 | || cu->language == language_pascal |
15827 | || cu->language == language_fortran) | |
19f392bc UW |
15828 | type = init_character_type (objfile, bits, 0, name); |
15829 | else | |
15830 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
15831 | break; |
15832 | case DW_ATE_unsigned_char: | |
868a0084 | 15833 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 15834 | || cu->language == language_pascal |
c44af4eb TT |
15835 | || cu->language == language_fortran |
15836 | || cu->language == language_rust) | |
19f392bc UW |
15837 | type = init_character_type (objfile, bits, 1, name); |
15838 | else | |
15839 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 15840 | break; |
75079b2b | 15841 | case DW_ATE_UTF: |
53e710ac PA |
15842 | { |
15843 | gdbarch *arch = get_objfile_arch (objfile); | |
15844 | ||
15845 | if (bits == 16) | |
15846 | type = builtin_type (arch)->builtin_char16; | |
15847 | else if (bits == 32) | |
15848 | type = builtin_type (arch)->builtin_char32; | |
15849 | else | |
15850 | { | |
15851 | complaint (&symfile_complaints, | |
15852 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
15853 | bits); | |
15854 | type = init_integer_type (objfile, bits, 1, name); | |
15855 | } | |
15856 | return set_die_type (die, type, cu); | |
15857 | } | |
75079b2b TT |
15858 | break; |
15859 | ||
6ccb9162 UW |
15860 | default: |
15861 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
15862 | dwarf_type_encoding_name (encoding)); | |
77b7c781 | 15863 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 15864 | break; |
c906108c | 15865 | } |
6ccb9162 | 15866 | |
0114d602 | 15867 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 15868 | TYPE_NOSIGN (type) = 1; |
0114d602 | 15869 | |
f792889a | 15870 | return set_die_type (die, type, cu); |
c906108c SS |
15871 | } |
15872 | ||
80180f79 SA |
15873 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
15874 | resulting value of the attribute into struct bound_prop. | |
15875 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
15876 | ||
15877 | static int | |
15878 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
15879 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
15880 | { | |
15881 | struct dwarf2_property_baton *baton; | |
15882 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
15883 | ||
15884 | if (attr == NULL || prop == NULL) | |
15885 | return 0; | |
15886 | ||
15887 | if (attr_form_is_block (attr)) | |
15888 | { | |
8d749320 | 15889 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
15890 | baton->referenced_type = NULL; |
15891 | baton->locexpr.per_cu = cu->per_cu; | |
15892 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
15893 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
15894 | prop->data.baton = baton; | |
15895 | prop->kind = PROP_LOCEXPR; | |
15896 | gdb_assert (prop->data.baton != NULL); | |
15897 | } | |
15898 | else if (attr_form_is_ref (attr)) | |
15899 | { | |
15900 | struct dwarf2_cu *target_cu = cu; | |
15901 | struct die_info *target_die; | |
15902 | struct attribute *target_attr; | |
15903 | ||
15904 | target_die = follow_die_ref (die, attr, &target_cu); | |
15905 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
15906 | if (target_attr == NULL) |
15907 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
15908 | target_cu); | |
80180f79 SA |
15909 | if (target_attr == NULL) |
15910 | return 0; | |
15911 | ||
df25ebbd | 15912 | switch (target_attr->name) |
80180f79 | 15913 | { |
df25ebbd JB |
15914 | case DW_AT_location: |
15915 | if (attr_form_is_section_offset (target_attr)) | |
15916 | { | |
8d749320 | 15917 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15918 | baton->referenced_type = die_type (target_die, target_cu); |
15919 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
15920 | prop->data.baton = baton; | |
15921 | prop->kind = PROP_LOCLIST; | |
15922 | gdb_assert (prop->data.baton != NULL); | |
15923 | } | |
15924 | else if (attr_form_is_block (target_attr)) | |
15925 | { | |
8d749320 | 15926 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15927 | baton->referenced_type = die_type (target_die, target_cu); |
15928 | baton->locexpr.per_cu = cu->per_cu; | |
15929 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
15930 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
15931 | prop->data.baton = baton; | |
15932 | prop->kind = PROP_LOCEXPR; | |
15933 | gdb_assert (prop->data.baton != NULL); | |
15934 | } | |
15935 | else | |
15936 | { | |
15937 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15938 | "dynamic property"); | |
15939 | return 0; | |
15940 | } | |
15941 | break; | |
15942 | case DW_AT_data_member_location: | |
15943 | { | |
15944 | LONGEST offset; | |
15945 | ||
15946 | if (!handle_data_member_location (target_die, target_cu, | |
15947 | &offset)) | |
15948 | return 0; | |
15949 | ||
8d749320 | 15950 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
15951 | baton->referenced_type = read_type_die (target_die->parent, |
15952 | target_cu); | |
df25ebbd JB |
15953 | baton->offset_info.offset = offset; |
15954 | baton->offset_info.type = die_type (target_die, target_cu); | |
15955 | prop->data.baton = baton; | |
15956 | prop->kind = PROP_ADDR_OFFSET; | |
15957 | break; | |
15958 | } | |
80180f79 SA |
15959 | } |
15960 | } | |
15961 | else if (attr_form_is_constant (attr)) | |
15962 | { | |
15963 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
15964 | prop->kind = PROP_CONST; | |
15965 | } | |
15966 | else | |
15967 | { | |
15968 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
15969 | dwarf2_name (die, cu)); | |
15970 | return 0; | |
15971 | } | |
15972 | ||
15973 | return 1; | |
15974 | } | |
15975 | ||
a02abb62 JB |
15976 | /* Read the given DW_AT_subrange DIE. */ |
15977 | ||
f792889a | 15978 | static struct type * |
a02abb62 JB |
15979 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
15980 | { | |
4c9ad8c2 | 15981 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
15982 | struct type *range_type; |
15983 | struct attribute *attr; | |
729efb13 | 15984 | struct dynamic_prop low, high; |
4fae6e18 | 15985 | int low_default_is_valid; |
c451ebe5 | 15986 | int high_bound_is_count = 0; |
15d034d0 | 15987 | const char *name; |
43bbcdc2 | 15988 | LONGEST negative_mask; |
e77813c8 | 15989 | |
4c9ad8c2 TT |
15990 | orig_base_type = die_type (die, cu); |
15991 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
15992 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
15993 | creating the range type, but we use the result of check_typedef | |
15994 | when examining properties of the type. */ | |
15995 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 15996 | |
7e314c57 JK |
15997 | /* The die_type call above may have already set the type for this DIE. */ |
15998 | range_type = get_die_type (die, cu); | |
15999 | if (range_type) | |
16000 | return range_type; | |
16001 | ||
729efb13 SA |
16002 | low.kind = PROP_CONST; |
16003 | high.kind = PROP_CONST; | |
16004 | high.data.const_val = 0; | |
16005 | ||
4fae6e18 JK |
16006 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
16007 | omitting DW_AT_lower_bound. */ | |
16008 | switch (cu->language) | |
6e70227d | 16009 | { |
4fae6e18 JK |
16010 | case language_c: |
16011 | case language_cplus: | |
729efb13 | 16012 | low.data.const_val = 0; |
4fae6e18 JK |
16013 | low_default_is_valid = 1; |
16014 | break; | |
16015 | case language_fortran: | |
729efb13 | 16016 | low.data.const_val = 1; |
4fae6e18 JK |
16017 | low_default_is_valid = 1; |
16018 | break; | |
16019 | case language_d: | |
4fae6e18 | 16020 | case language_objc: |
c44af4eb | 16021 | case language_rust: |
729efb13 | 16022 | low.data.const_val = 0; |
4fae6e18 JK |
16023 | low_default_is_valid = (cu->header.version >= 4); |
16024 | break; | |
16025 | case language_ada: | |
16026 | case language_m2: | |
16027 | case language_pascal: | |
729efb13 | 16028 | low.data.const_val = 1; |
4fae6e18 JK |
16029 | low_default_is_valid = (cu->header.version >= 4); |
16030 | break; | |
16031 | default: | |
729efb13 | 16032 | low.data.const_val = 0; |
4fae6e18 JK |
16033 | low_default_is_valid = 0; |
16034 | break; | |
a02abb62 JB |
16035 | } |
16036 | ||
e142c38c | 16037 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 16038 | if (attr) |
11c1ba78 | 16039 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
16040 | else if (!low_default_is_valid) |
16041 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
16042 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16043 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 16044 | |
e142c38c | 16045 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 16046 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
16047 | { |
16048 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 16049 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 16050 | { |
c451ebe5 SA |
16051 | /* If bounds are constant do the final calculation here. */ |
16052 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
16053 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
16054 | else | |
16055 | high_bound_is_count = 1; | |
c2ff108b | 16056 | } |
e77813c8 PM |
16057 | } |
16058 | ||
16059 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
16060 | without specifying a base type. | |
16061 | In that case, the base type must be set to the type of | |
16062 | the lower bound, upper bound or count, in that order, if any of these | |
16063 | three attributes references an object that has a type. | |
16064 | If no base type is found, the Dwarf-2 specifications say that | |
16065 | a signed integer type of size equal to the size of an address should | |
16066 | be used. | |
16067 | For the following C code: `extern char gdb_int [];' | |
16068 | GCC produces an empty range DIE. | |
16069 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 16070 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
16071 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
16072 | { | |
16073 | struct objfile *objfile = cu->objfile; | |
16074 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16075 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
16076 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
16077 | ||
16078 | /* Test "int", "long int", and "long long int" objfile types, | |
16079 | and select the first one having a size above or equal to the | |
16080 | architecture address size. */ | |
16081 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16082 | base_type = int_type; | |
16083 | else | |
16084 | { | |
16085 | int_type = objfile_type (objfile)->builtin_long; | |
16086 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16087 | base_type = int_type; | |
16088 | else | |
16089 | { | |
16090 | int_type = objfile_type (objfile)->builtin_long_long; | |
16091 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16092 | base_type = int_type; | |
16093 | } | |
16094 | } | |
16095 | } | |
a02abb62 | 16096 | |
dbb9c2b1 JB |
16097 | /* Normally, the DWARF producers are expected to use a signed |
16098 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
16099 | But this is unfortunately not always the case, as witnessed | |
16100 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
16101 | is used instead. To work around that ambiguity, we treat | |
16102 | the bounds as signed, and thus sign-extend their values, when | |
16103 | the base type is signed. */ | |
6e70227d | 16104 | negative_mask = |
66c6502d | 16105 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
16106 | if (low.kind == PROP_CONST |
16107 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
16108 | low.data.const_val |= negative_mask; | |
16109 | if (high.kind == PROP_CONST | |
16110 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
16111 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 16112 | |
729efb13 | 16113 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 16114 | |
c451ebe5 SA |
16115 | if (high_bound_is_count) |
16116 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
16117 | ||
c2ff108b JK |
16118 | /* Ada expects an empty array on no boundary attributes. */ |
16119 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 16120 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 16121 | |
39cbfefa DJ |
16122 | name = dwarf2_name (die, cu); |
16123 | if (name) | |
16124 | TYPE_NAME (range_type) = name; | |
6e70227d | 16125 | |
e142c38c | 16126 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
16127 | if (attr) |
16128 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
16129 | ||
7e314c57 JK |
16130 | set_die_type (die, range_type, cu); |
16131 | ||
16132 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16133 | set_descriptive_type (range_type, die, cu); |
16134 | ||
7e314c57 | 16135 | return range_type; |
a02abb62 | 16136 | } |
6e70227d | 16137 | |
f792889a | 16138 | static struct type * |
81a17f79 JB |
16139 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
16140 | { | |
16141 | struct type *type; | |
81a17f79 | 16142 | |
81a17f79 JB |
16143 | /* For now, we only support the C meaning of an unspecified type: void. */ |
16144 | ||
19f392bc | 16145 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 16146 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 16147 | |
f792889a | 16148 | return set_die_type (die, type, cu); |
81a17f79 | 16149 | } |
a02abb62 | 16150 | |
639d11d3 DC |
16151 | /* Read a single die and all its descendents. Set the die's sibling |
16152 | field to NULL; set other fields in the die correctly, and set all | |
16153 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
16154 | location of the info_ptr after reading all of those dies. PARENT | |
16155 | is the parent of the die in question. */ | |
16156 | ||
16157 | static struct die_info * | |
dee91e82 | 16158 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
16159 | const gdb_byte *info_ptr, |
16160 | const gdb_byte **new_info_ptr, | |
dee91e82 | 16161 | struct die_info *parent) |
639d11d3 DC |
16162 | { |
16163 | struct die_info *die; | |
d521ce57 | 16164 | const gdb_byte *cur_ptr; |
639d11d3 DC |
16165 | int has_children; |
16166 | ||
bf6af496 | 16167 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
16168 | if (die == NULL) |
16169 | { | |
16170 | *new_info_ptr = cur_ptr; | |
16171 | return NULL; | |
16172 | } | |
93311388 | 16173 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
16174 | |
16175 | if (has_children) | |
bf6af496 | 16176 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
16177 | else |
16178 | { | |
16179 | die->child = NULL; | |
16180 | *new_info_ptr = cur_ptr; | |
16181 | } | |
16182 | ||
16183 | die->sibling = NULL; | |
16184 | die->parent = parent; | |
16185 | return die; | |
16186 | } | |
16187 | ||
16188 | /* Read a die, all of its descendents, and all of its siblings; set | |
16189 | all of the fields of all of the dies correctly. Arguments are as | |
16190 | in read_die_and_children. */ | |
16191 | ||
16192 | static struct die_info * | |
bf6af496 | 16193 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
16194 | const gdb_byte *info_ptr, |
16195 | const gdb_byte **new_info_ptr, | |
bf6af496 | 16196 | struct die_info *parent) |
639d11d3 DC |
16197 | { |
16198 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 16199 | const gdb_byte *cur_ptr; |
639d11d3 | 16200 | |
c906108c | 16201 | cur_ptr = info_ptr; |
639d11d3 DC |
16202 | first_die = last_sibling = NULL; |
16203 | ||
16204 | while (1) | |
c906108c | 16205 | { |
639d11d3 | 16206 | struct die_info *die |
dee91e82 | 16207 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 16208 | |
1d325ec1 | 16209 | if (die == NULL) |
c906108c | 16210 | { |
639d11d3 DC |
16211 | *new_info_ptr = cur_ptr; |
16212 | return first_die; | |
c906108c | 16213 | } |
1d325ec1 DJ |
16214 | |
16215 | if (!first_die) | |
16216 | first_die = die; | |
c906108c | 16217 | else |
1d325ec1 DJ |
16218 | last_sibling->sibling = die; |
16219 | ||
16220 | last_sibling = die; | |
c906108c | 16221 | } |
c906108c SS |
16222 | } |
16223 | ||
bf6af496 DE |
16224 | /* Read a die, all of its descendents, and all of its siblings; set |
16225 | all of the fields of all of the dies correctly. Arguments are as | |
16226 | in read_die_and_children. | |
16227 | This the main entry point for reading a DIE and all its children. */ | |
16228 | ||
16229 | static struct die_info * | |
16230 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
16231 | const gdb_byte *info_ptr, |
16232 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
16233 | struct die_info *parent) |
16234 | { | |
16235 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
16236 | new_info_ptr, parent); | |
16237 | ||
b4f54984 | 16238 | if (dwarf_die_debug) |
bf6af496 DE |
16239 | { |
16240 | fprintf_unfiltered (gdb_stdlog, | |
16241 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16242 | get_section_name (reader->die_section), |
bf6af496 DE |
16243 | (unsigned) (info_ptr - reader->die_section->buffer), |
16244 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16245 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
16246 | } |
16247 | ||
16248 | return die; | |
16249 | } | |
16250 | ||
3019eac3 DE |
16251 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
16252 | attributes. | |
16253 | The caller is responsible for filling in the extra attributes | |
16254 | and updating (*DIEP)->num_attrs. | |
16255 | Set DIEP to point to a newly allocated die with its information, | |
16256 | except for its child, sibling, and parent fields. | |
16257 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 16258 | |
d521ce57 | 16259 | static const gdb_byte * |
3019eac3 | 16260 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 16261 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 16262 | int *has_children, int num_extra_attrs) |
93311388 | 16263 | { |
b64f50a1 | 16264 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
16265 | struct abbrev_info *abbrev; |
16266 | struct die_info *die; | |
16267 | struct dwarf2_cu *cu = reader->cu; | |
16268 | bfd *abfd = reader->abfd; | |
16269 | ||
9c541725 | 16270 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
16271 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16272 | info_ptr += bytes_read; | |
16273 | if (!abbrev_number) | |
16274 | { | |
16275 | *diep = NULL; | |
16276 | *has_children = 0; | |
16277 | return info_ptr; | |
16278 | } | |
16279 | ||
433df2d4 | 16280 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 16281 | if (!abbrev) |
348e048f DE |
16282 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
16283 | abbrev_number, | |
16284 | bfd_get_filename (abfd)); | |
16285 | ||
3019eac3 | 16286 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 16287 | die->sect_off = sect_off; |
93311388 DE |
16288 | die->tag = abbrev->tag; |
16289 | die->abbrev = abbrev_number; | |
16290 | ||
3019eac3 DE |
16291 | /* Make the result usable. |
16292 | The caller needs to update num_attrs after adding the extra | |
16293 | attributes. */ | |
93311388 DE |
16294 | die->num_attrs = abbrev->num_attrs; |
16295 | ||
16296 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
16297 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
16298 | info_ptr); | |
93311388 DE |
16299 | |
16300 | *diep = die; | |
16301 | *has_children = abbrev->has_children; | |
16302 | return info_ptr; | |
16303 | } | |
16304 | ||
3019eac3 DE |
16305 | /* Read a die and all its attributes. |
16306 | Set DIEP to point to a newly allocated die with its information, | |
16307 | except for its child, sibling, and parent fields. | |
16308 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
16309 | ||
d521ce57 | 16310 | static const gdb_byte * |
3019eac3 | 16311 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 16312 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
16313 | int *has_children) |
16314 | { | |
d521ce57 | 16315 | const gdb_byte *result; |
bf6af496 DE |
16316 | |
16317 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
16318 | ||
b4f54984 | 16319 | if (dwarf_die_debug) |
bf6af496 DE |
16320 | { |
16321 | fprintf_unfiltered (gdb_stdlog, | |
16322 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16323 | get_section_name (reader->die_section), |
bf6af496 DE |
16324 | (unsigned) (info_ptr - reader->die_section->buffer), |
16325 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16326 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
16327 | } |
16328 | ||
16329 | return result; | |
3019eac3 | 16330 | } |
433df2d4 DE |
16331 | \f |
16332 | /* Abbreviation tables. | |
3019eac3 | 16333 | |
433df2d4 | 16334 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
16335 | stored in a separate .debug_abbrev section. Before we read any |
16336 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
16337 | in a hash table. */ |
16338 | ||
16339 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
16340 | ||
16341 | static struct abbrev_info * | |
16342 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
16343 | { | |
16344 | struct abbrev_info *abbrev; | |
16345 | ||
8d749320 | 16346 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 16347 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 16348 | |
433df2d4 DE |
16349 | return abbrev; |
16350 | } | |
16351 | ||
16352 | /* Add an abbreviation to the table. */ | |
c906108c SS |
16353 | |
16354 | static void | |
433df2d4 DE |
16355 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
16356 | unsigned int abbrev_number, | |
16357 | struct abbrev_info *abbrev) | |
16358 | { | |
16359 | unsigned int hash_number; | |
16360 | ||
16361 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16362 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
16363 | abbrev_table->abbrevs[hash_number] = abbrev; | |
16364 | } | |
dee91e82 | 16365 | |
433df2d4 DE |
16366 | /* Look up an abbrev in the table. |
16367 | Returns NULL if the abbrev is not found. */ | |
16368 | ||
16369 | static struct abbrev_info * | |
16370 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
16371 | unsigned int abbrev_number) | |
c906108c | 16372 | { |
433df2d4 DE |
16373 | unsigned int hash_number; |
16374 | struct abbrev_info *abbrev; | |
16375 | ||
16376 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16377 | abbrev = abbrev_table->abbrevs[hash_number]; | |
16378 | ||
16379 | while (abbrev) | |
16380 | { | |
16381 | if (abbrev->number == abbrev_number) | |
16382 | return abbrev; | |
16383 | abbrev = abbrev->next; | |
16384 | } | |
16385 | return NULL; | |
16386 | } | |
16387 | ||
16388 | /* Read in an abbrev table. */ | |
16389 | ||
16390 | static struct abbrev_table * | |
16391 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 16392 | sect_offset sect_off) |
433df2d4 DE |
16393 | { |
16394 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 16395 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 16396 | struct abbrev_table *abbrev_table; |
d521ce57 | 16397 | const gdb_byte *abbrev_ptr; |
c906108c SS |
16398 | struct abbrev_info *cur_abbrev; |
16399 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 16400 | unsigned int abbrev_form; |
f3dd6933 DJ |
16401 | struct attr_abbrev *cur_attrs; |
16402 | unsigned int allocated_attrs; | |
c906108c | 16403 | |
70ba0933 | 16404 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 16405 | abbrev_table->sect_off = sect_off; |
433df2d4 | 16406 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
16407 | abbrev_table->abbrevs = |
16408 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
16409 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
16410 | memset (abbrev_table->abbrevs, 0, |
16411 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 16412 | |
433df2d4 | 16413 | dwarf2_read_section (objfile, section); |
9c541725 | 16414 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
16415 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16416 | abbrev_ptr += bytes_read; | |
16417 | ||
f3dd6933 | 16418 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 16419 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 16420 | |
0963b4bd | 16421 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
16422 | while (abbrev_number) |
16423 | { | |
433df2d4 | 16424 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
16425 | |
16426 | /* read in abbrev header */ | |
16427 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
16428 | cur_abbrev->tag |
16429 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
16430 | abbrev_ptr += bytes_read; |
16431 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
16432 | abbrev_ptr += 1; | |
16433 | ||
16434 | /* now read in declarations */ | |
22d2f3ab | 16435 | for (;;) |
c906108c | 16436 | { |
43988095 JK |
16437 | LONGEST implicit_const; |
16438 | ||
22d2f3ab JK |
16439 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16440 | abbrev_ptr += bytes_read; | |
16441 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16442 | abbrev_ptr += bytes_read; | |
43988095 JK |
16443 | if (abbrev_form == DW_FORM_implicit_const) |
16444 | { | |
16445 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
16446 | &bytes_read); | |
16447 | abbrev_ptr += bytes_read; | |
16448 | } | |
16449 | else | |
16450 | { | |
16451 | /* Initialize it due to a false compiler warning. */ | |
16452 | implicit_const = -1; | |
16453 | } | |
22d2f3ab JK |
16454 | |
16455 | if (abbrev_name == 0) | |
16456 | break; | |
16457 | ||
f3dd6933 | 16458 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 16459 | { |
f3dd6933 DJ |
16460 | allocated_attrs += ATTR_ALLOC_CHUNK; |
16461 | cur_attrs | |
224c3ddb | 16462 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 16463 | } |
ae038cb0 | 16464 | |
aead7601 SM |
16465 | cur_attrs[cur_abbrev->num_attrs].name |
16466 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 16467 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 16468 | = (enum dwarf_form) abbrev_form; |
43988095 | 16469 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 16470 | ++cur_abbrev->num_attrs; |
c906108c SS |
16471 | } |
16472 | ||
8d749320 SM |
16473 | cur_abbrev->attrs = |
16474 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
16475 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
16476 | memcpy (cur_abbrev->attrs, cur_attrs, |
16477 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
16478 | ||
433df2d4 | 16479 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
16480 | |
16481 | /* Get next abbreviation. | |
16482 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
16483 | always properly terminated with an abbrev number of 0. |
16484 | Exit loop if we encounter an abbreviation which we have | |
16485 | already read (which means we are about to read the abbreviations | |
16486 | for the next compile unit) or if the end of the abbreviation | |
16487 | table is reached. */ | |
433df2d4 | 16488 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
16489 | break; |
16490 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16491 | abbrev_ptr += bytes_read; | |
433df2d4 | 16492 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
16493 | break; |
16494 | } | |
f3dd6933 DJ |
16495 | |
16496 | xfree (cur_attrs); | |
433df2d4 | 16497 | return abbrev_table; |
c906108c SS |
16498 | } |
16499 | ||
433df2d4 | 16500 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 16501 | |
c906108c | 16502 | static void |
433df2d4 | 16503 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 16504 | { |
433df2d4 DE |
16505 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
16506 | xfree (abbrev_table); | |
c906108c SS |
16507 | } |
16508 | ||
f4dc4d17 DE |
16509 | /* Same as abbrev_table_free but as a cleanup. |
16510 | We pass in a pointer to the pointer to the table so that we can | |
16511 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 16512 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
16513 | |
16514 | static void | |
16515 | abbrev_table_free_cleanup (void *table_ptr) | |
16516 | { | |
9a3c8263 | 16517 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
16518 | |
16519 | if (*abbrev_table_ptr != NULL) | |
16520 | abbrev_table_free (*abbrev_table_ptr); | |
16521 | *abbrev_table_ptr = NULL; | |
16522 | } | |
16523 | ||
433df2d4 DE |
16524 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
16525 | ||
16526 | static void | |
16527 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
16528 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 16529 | { |
433df2d4 | 16530 | cu->abbrev_table = |
9c541725 | 16531 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 16532 | } |
c906108c | 16533 | |
433df2d4 | 16534 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 16535 | |
433df2d4 DE |
16536 | static void |
16537 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
16538 | { | |
9a3c8263 | 16539 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 16540 | |
a2ce51a0 DE |
16541 | if (cu->abbrev_table != NULL) |
16542 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
16543 | /* Set this to NULL so that we SEGV if we try to read it later, |
16544 | and also because free_comp_unit verifies this is NULL. */ | |
16545 | cu->abbrev_table = NULL; | |
16546 | } | |
16547 | \f | |
72bf9492 DJ |
16548 | /* Returns nonzero if TAG represents a type that we might generate a partial |
16549 | symbol for. */ | |
16550 | ||
16551 | static int | |
16552 | is_type_tag_for_partial (int tag) | |
16553 | { | |
16554 | switch (tag) | |
16555 | { | |
16556 | #if 0 | |
16557 | /* Some types that would be reasonable to generate partial symbols for, | |
16558 | that we don't at present. */ | |
16559 | case DW_TAG_array_type: | |
16560 | case DW_TAG_file_type: | |
16561 | case DW_TAG_ptr_to_member_type: | |
16562 | case DW_TAG_set_type: | |
16563 | case DW_TAG_string_type: | |
16564 | case DW_TAG_subroutine_type: | |
16565 | #endif | |
16566 | case DW_TAG_base_type: | |
16567 | case DW_TAG_class_type: | |
680b30c7 | 16568 | case DW_TAG_interface_type: |
72bf9492 DJ |
16569 | case DW_TAG_enumeration_type: |
16570 | case DW_TAG_structure_type: | |
16571 | case DW_TAG_subrange_type: | |
16572 | case DW_TAG_typedef: | |
16573 | case DW_TAG_union_type: | |
16574 | return 1; | |
16575 | default: | |
16576 | return 0; | |
16577 | } | |
16578 | } | |
16579 | ||
16580 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
16581 | ||
16582 | static struct partial_die_info * | |
dee91e82 | 16583 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 16584 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 16585 | { |
dee91e82 | 16586 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16587 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
16588 | struct partial_die_info *part_die; |
16589 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
16590 | struct abbrev_info *abbrev; | |
16591 | unsigned int bytes_read; | |
5afb4e99 | 16592 | unsigned int load_all = 0; |
72bf9492 DJ |
16593 | int nesting_level = 1; |
16594 | ||
16595 | parent_die = NULL; | |
16596 | last_die = NULL; | |
16597 | ||
7adf1e79 DE |
16598 | gdb_assert (cu->per_cu != NULL); |
16599 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16600 | load_all = 1; |
16601 | ||
72bf9492 DJ |
16602 | cu->partial_dies |
16603 | = htab_create_alloc_ex (cu->header.length / 12, | |
16604 | partial_die_hash, | |
16605 | partial_die_eq, | |
16606 | NULL, | |
16607 | &cu->comp_unit_obstack, | |
16608 | hashtab_obstack_allocate, | |
16609 | dummy_obstack_deallocate); | |
16610 | ||
8d749320 | 16611 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16612 | |
16613 | while (1) | |
16614 | { | |
16615 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16616 | ||
16617 | /* A NULL abbrev means the end of a series of children. */ | |
16618 | if (abbrev == NULL) | |
16619 | { | |
16620 | if (--nesting_level == 0) | |
16621 | { | |
16622 | /* PART_DIE was probably the last thing allocated on the | |
16623 | comp_unit_obstack, so we could call obstack_free | |
16624 | here. We don't do that because the waste is small, | |
16625 | and will be cleaned up when we're done with this | |
16626 | compilation unit. This way, we're also more robust | |
16627 | against other users of the comp_unit_obstack. */ | |
16628 | return first_die; | |
16629 | } | |
16630 | info_ptr += bytes_read; | |
16631 | last_die = parent_die; | |
16632 | parent_die = parent_die->die_parent; | |
16633 | continue; | |
16634 | } | |
16635 | ||
98bfdba5 PA |
16636 | /* Check for template arguments. We never save these; if |
16637 | they're seen, we just mark the parent, and go on our way. */ | |
16638 | if (parent_die != NULL | |
16639 | && cu->language == language_cplus | |
16640 | && (abbrev->tag == DW_TAG_template_type_param | |
16641 | || abbrev->tag == DW_TAG_template_value_param)) | |
16642 | { | |
16643 | parent_die->has_template_arguments = 1; | |
16644 | ||
16645 | if (!load_all) | |
16646 | { | |
16647 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16648 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16649 | continue; |
16650 | } | |
16651 | } | |
16652 | ||
0d99eb77 | 16653 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16654 | Skip their other children. */ |
16655 | if (!load_all | |
16656 | && cu->language == language_cplus | |
16657 | && parent_die != NULL | |
16658 | && parent_die->tag == DW_TAG_subprogram) | |
16659 | { | |
dee91e82 | 16660 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16661 | continue; |
16662 | } | |
16663 | ||
5afb4e99 DJ |
16664 | /* Check whether this DIE is interesting enough to save. Normally |
16665 | we would not be interested in members here, but there may be | |
16666 | later variables referencing them via DW_AT_specification (for | |
16667 | static members). */ | |
16668 | if (!load_all | |
16669 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16670 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
16671 | && abbrev->tag != DW_TAG_enumerator |
16672 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 16673 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 16674 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 16675 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 16676 | && abbrev->tag != DW_TAG_module |
95554aad | 16677 | && abbrev->tag != DW_TAG_member |
74921315 KS |
16678 | && abbrev->tag != DW_TAG_imported_unit |
16679 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
16680 | { |
16681 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16682 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
16683 | continue; |
16684 | } | |
16685 | ||
dee91e82 DE |
16686 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
16687 | info_ptr); | |
72bf9492 DJ |
16688 | |
16689 | /* This two-pass algorithm for processing partial symbols has a | |
16690 | high cost in cache pressure. Thus, handle some simple cases | |
16691 | here which cover the majority of C partial symbols. DIEs | |
16692 | which neither have specification tags in them, nor could have | |
16693 | specification tags elsewhere pointing at them, can simply be | |
16694 | processed and discarded. | |
16695 | ||
16696 | This segment is also optional; scan_partial_symbols and | |
16697 | add_partial_symbol will handle these DIEs if we chain | |
16698 | them in normally. When compilers which do not emit large | |
16699 | quantities of duplicate debug information are more common, | |
16700 | this code can probably be removed. */ | |
16701 | ||
16702 | /* Any complete simple types at the top level (pretty much all | |
16703 | of them, for a language without namespaces), can be processed | |
16704 | directly. */ | |
16705 | if (parent_die == NULL | |
16706 | && part_die->has_specification == 0 | |
16707 | && part_die->is_declaration == 0 | |
d8228535 | 16708 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
16709 | || part_die->tag == DW_TAG_base_type |
16710 | || part_die->tag == DW_TAG_subrange_type)) | |
16711 | { | |
16712 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 16713 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16714 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 16715 | &objfile->static_psymbols, |
1762568f | 16716 | 0, cu->language, objfile); |
dee91e82 | 16717 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16718 | continue; |
16719 | } | |
16720 | ||
d8228535 JK |
16721 | /* The exception for DW_TAG_typedef with has_children above is |
16722 | a workaround of GCC PR debug/47510. In the case of this complaint | |
16723 | type_name_no_tag_or_error will error on such types later. | |
16724 | ||
16725 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
16726 | it could not find the child DIEs referenced later, this is checked | |
16727 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
16728 | ||
16729 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
16730 | complaint (&symfile_complaints, | |
16731 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
16732 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16733 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 16734 | |
72bf9492 DJ |
16735 | /* If we're at the second level, and we're an enumerator, and |
16736 | our parent has no specification (meaning possibly lives in a | |
16737 | namespace elsewhere), then we can add the partial symbol now | |
16738 | instead of queueing it. */ | |
16739 | if (part_die->tag == DW_TAG_enumerator | |
16740 | && parent_die != NULL | |
16741 | && parent_die->die_parent == NULL | |
16742 | && parent_die->tag == DW_TAG_enumeration_type | |
16743 | && parent_die->has_specification == 0) | |
16744 | { | |
16745 | if (part_die->name == NULL) | |
3e43a32a MS |
16746 | complaint (&symfile_complaints, |
16747 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 16748 | else if (building_psymtab) |
04a679b8 | 16749 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16750 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 16751 | cu->language == language_cplus |
bb5ed363 DE |
16752 | ? &objfile->global_psymbols |
16753 | : &objfile->static_psymbols, | |
1762568f | 16754 | 0, cu->language, objfile); |
72bf9492 | 16755 | |
dee91e82 | 16756 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16757 | continue; |
16758 | } | |
16759 | ||
16760 | /* We'll save this DIE so link it in. */ | |
16761 | part_die->die_parent = parent_die; | |
16762 | part_die->die_sibling = NULL; | |
16763 | part_die->die_child = NULL; | |
16764 | ||
16765 | if (last_die && last_die == parent_die) | |
16766 | last_die->die_child = part_die; | |
16767 | else if (last_die) | |
16768 | last_die->die_sibling = part_die; | |
16769 | ||
16770 | last_die = part_die; | |
16771 | ||
16772 | if (first_die == NULL) | |
16773 | first_die = part_die; | |
16774 | ||
16775 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
16776 | find interesting need to be in the hash table, because we | |
16777 | also have the parent/sibling/child chains; only those that we | |
16778 | might refer to by offset later during partial symbol reading. | |
16779 | ||
16780 | For now this means things that might have be the target of a | |
16781 | DW_AT_specification, DW_AT_abstract_origin, or | |
16782 | DW_AT_extension. DW_AT_extension will refer only to | |
16783 | namespaces; DW_AT_abstract_origin refers to functions (and | |
16784 | many things under the function DIE, but we do not recurse | |
16785 | into function DIEs during partial symbol reading) and | |
16786 | possibly variables as well; DW_AT_specification refers to | |
16787 | declarations. Declarations ought to have the DW_AT_declaration | |
16788 | flag. It happens that GCC forgets to put it in sometimes, but | |
16789 | only for functions, not for types. | |
16790 | ||
16791 | Adding more things than necessary to the hash table is harmless | |
16792 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
16793 | wasted time in find_partial_die, when we reread the compilation |
16794 | unit with load_all_dies set. */ | |
72bf9492 | 16795 | |
5afb4e99 | 16796 | if (load_all |
72929c62 | 16797 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 16798 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
16799 | || abbrev->tag == DW_TAG_variable |
16800 | || abbrev->tag == DW_TAG_namespace | |
16801 | || part_die->is_declaration) | |
16802 | { | |
16803 | void **slot; | |
16804 | ||
16805 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
16806 | to_underlying (part_die->sect_off), |
16807 | INSERT); | |
72bf9492 DJ |
16808 | *slot = part_die; |
16809 | } | |
16810 | ||
8d749320 | 16811 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16812 | |
16813 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 16814 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
16815 | languages we have to, so that we can get at method physnames |
16816 | to infer fully qualified class names, for DW_AT_specification, | |
16817 | and for C++ template arguments. For C++, we also look one level | |
16818 | inside functions to find template arguments (if the name of the | |
16819 | function does not already contain the template arguments). | |
bc30ff58 JB |
16820 | |
16821 | For Ada, we need to scan the children of subprograms and lexical | |
16822 | blocks as well because Ada allows the definition of nested | |
16823 | entities that could be interesting for the debugger, such as | |
16824 | nested subprograms for instance. */ | |
72bf9492 | 16825 | if (last_die->has_children |
5afb4e99 DJ |
16826 | && (load_all |
16827 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 16828 | || last_die->tag == DW_TAG_module |
72bf9492 | 16829 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
16830 | || (cu->language == language_cplus |
16831 | && last_die->tag == DW_TAG_subprogram | |
16832 | && (last_die->name == NULL | |
16833 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
16834 | || (cu->language != language_c |
16835 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 16836 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 16837 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
16838 | || last_die->tag == DW_TAG_union_type)) |
16839 | || (cu->language == language_ada | |
16840 | && (last_die->tag == DW_TAG_subprogram | |
16841 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
16842 | { |
16843 | nesting_level++; | |
16844 | parent_die = last_die; | |
16845 | continue; | |
16846 | } | |
16847 | ||
16848 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16849 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
16850 | |
16851 | /* Back to the top, do it again. */ | |
16852 | } | |
16853 | } | |
16854 | ||
c906108c SS |
16855 | /* Read a minimal amount of information into the minimal die structure. */ |
16856 | ||
d521ce57 | 16857 | static const gdb_byte * |
dee91e82 DE |
16858 | read_partial_die (const struct die_reader_specs *reader, |
16859 | struct partial_die_info *part_die, | |
16860 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 16861 | const gdb_byte *info_ptr) |
c906108c | 16862 | { |
dee91e82 | 16863 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16864 | struct objfile *objfile = cu->objfile; |
d521ce57 | 16865 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 16866 | unsigned int i; |
c906108c | 16867 | struct attribute attr; |
c5aa993b | 16868 | int has_low_pc_attr = 0; |
c906108c | 16869 | int has_high_pc_attr = 0; |
91da1414 | 16870 | int high_pc_relative = 0; |
c906108c | 16871 | |
72bf9492 | 16872 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 16873 | |
9c541725 | 16874 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
16875 | |
16876 | info_ptr += abbrev_len; | |
16877 | ||
16878 | if (abbrev == NULL) | |
16879 | return info_ptr; | |
16880 | ||
c906108c SS |
16881 | part_die->tag = abbrev->tag; |
16882 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
16883 | |
16884 | for (i = 0; i < abbrev->num_attrs; ++i) | |
16885 | { | |
dee91e82 | 16886 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
16887 | |
16888 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 16889 | partial symbol table. */ |
c906108c SS |
16890 | switch (attr.name) |
16891 | { | |
16892 | case DW_AT_name: | |
71c25dea TT |
16893 | switch (part_die->tag) |
16894 | { | |
16895 | case DW_TAG_compile_unit: | |
95554aad | 16896 | case DW_TAG_partial_unit: |
348e048f | 16897 | case DW_TAG_type_unit: |
71c25dea TT |
16898 | /* Compilation units have a DW_AT_name that is a filename, not |
16899 | a source language identifier. */ | |
16900 | case DW_TAG_enumeration_type: | |
16901 | case DW_TAG_enumerator: | |
16902 | /* These tags always have simple identifiers already; no need | |
16903 | to canonicalize them. */ | |
16904 | part_die->name = DW_STRING (&attr); | |
16905 | break; | |
16906 | default: | |
16907 | part_die->name | |
16908 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 16909 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
16910 | break; |
16911 | } | |
c906108c | 16912 | break; |
31ef98ae | 16913 | case DW_AT_linkage_name: |
c906108c | 16914 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
16915 | /* Note that both forms of linkage name might appear. We |
16916 | assume they will be the same, and we only store the last | |
16917 | one we see. */ | |
94af9270 KS |
16918 | if (cu->language == language_ada) |
16919 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 16920 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
16921 | break; |
16922 | case DW_AT_low_pc: | |
16923 | has_low_pc_attr = 1; | |
31aa7e4e | 16924 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
16925 | break; |
16926 | case DW_AT_high_pc: | |
16927 | has_high_pc_attr = 1; | |
31aa7e4e JB |
16928 | part_die->highpc = attr_value_as_address (&attr); |
16929 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
16930 | high_pc_relative = 1; | |
c906108c SS |
16931 | break; |
16932 | case DW_AT_location: | |
0963b4bd | 16933 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
16934 | if (attr_form_is_block (&attr)) |
16935 | { | |
95554aad | 16936 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 16937 | } |
3690dd37 | 16938 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 16939 | { |
4d3c2250 | 16940 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
16941 | } |
16942 | else | |
16943 | { | |
4d3c2250 KB |
16944 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
16945 | "partial symbol information"); | |
8e19ed76 | 16946 | } |
c906108c | 16947 | break; |
c906108c SS |
16948 | case DW_AT_external: |
16949 | part_die->is_external = DW_UNSND (&attr); | |
16950 | break; | |
16951 | case DW_AT_declaration: | |
16952 | part_die->is_declaration = DW_UNSND (&attr); | |
16953 | break; | |
16954 | case DW_AT_type: | |
16955 | part_die->has_type = 1; | |
16956 | break; | |
16957 | case DW_AT_abstract_origin: | |
16958 | case DW_AT_specification: | |
72bf9492 DJ |
16959 | case DW_AT_extension: |
16960 | part_die->has_specification = 1; | |
c764a876 | 16961 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16962 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16963 | || cu->per_cu->is_dwz); | |
c906108c SS |
16964 | break; |
16965 | case DW_AT_sibling: | |
16966 | /* Ignore absolute siblings, they might point outside of | |
16967 | the current compile unit. */ | |
16968 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
16969 | complaint (&symfile_complaints, |
16970 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 16971 | else |
b9502d3f | 16972 | { |
9c541725 PA |
16973 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
16974 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
16975 | |
16976 | if (sibling_ptr < info_ptr) | |
16977 | complaint (&symfile_complaints, | |
16978 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
16979 | else if (sibling_ptr > reader->buffer_end) |
16980 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
16981 | else |
16982 | part_die->sibling = sibling_ptr; | |
16983 | } | |
c906108c | 16984 | break; |
fa4028e9 JB |
16985 | case DW_AT_byte_size: |
16986 | part_die->has_byte_size = 1; | |
16987 | break; | |
ff908ebf AW |
16988 | case DW_AT_const_value: |
16989 | part_die->has_const_value = 1; | |
16990 | break; | |
68511cec CES |
16991 | case DW_AT_calling_convention: |
16992 | /* DWARF doesn't provide a way to identify a program's source-level | |
16993 | entry point. DW_AT_calling_convention attributes are only meant | |
16994 | to describe functions' calling conventions. | |
16995 | ||
16996 | However, because it's a necessary piece of information in | |
0c1b455e TT |
16997 | Fortran, and before DWARF 4 DW_CC_program was the only |
16998 | piece of debugging information whose definition refers to | |
16999 | a 'main program' at all, several compilers marked Fortran | |
17000 | main programs with DW_CC_program --- even when those | |
17001 | functions use the standard calling conventions. | |
17002 | ||
17003 | Although DWARF now specifies a way to provide this | |
17004 | information, we support this practice for backward | |
17005 | compatibility. */ | |
68511cec | 17006 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
17007 | && cu->language == language_fortran) |
17008 | part_die->main_subprogram = 1; | |
68511cec | 17009 | break; |
481860b3 GB |
17010 | case DW_AT_inline: |
17011 | if (DW_UNSND (&attr) == DW_INL_inlined | |
17012 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
17013 | part_die->may_be_inlined = 1; | |
17014 | break; | |
95554aad TT |
17015 | |
17016 | case DW_AT_import: | |
17017 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 17018 | { |
9c541725 | 17019 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17020 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17021 | || cu->per_cu->is_dwz); | |
17022 | } | |
95554aad TT |
17023 | break; |
17024 | ||
0c1b455e TT |
17025 | case DW_AT_main_subprogram: |
17026 | part_die->main_subprogram = DW_UNSND (&attr); | |
17027 | break; | |
17028 | ||
c906108c SS |
17029 | default: |
17030 | break; | |
17031 | } | |
17032 | } | |
17033 | ||
91da1414 MW |
17034 | if (high_pc_relative) |
17035 | part_die->highpc += part_die->lowpc; | |
17036 | ||
9373cf26 JK |
17037 | if (has_low_pc_attr && has_high_pc_attr) |
17038 | { | |
17039 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
17040 | eliminate duplicate copies of functions and vtables and such. | |
17041 | The linker will arbitrarily choose one and discard the others. | |
17042 | The AT_*_pc values for such functions refer to local labels in | |
17043 | these sections. If the section from that file was discarded, the | |
17044 | labels are not in the output, so the relocs get a value of 0. | |
17045 | If this is a discarded function, mark the pc bounds as invalid, | |
17046 | so that GDB will ignore it. */ | |
17047 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
17048 | { | |
bb5ed363 | 17049 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17050 | |
17051 | complaint (&symfile_complaints, | |
17052 | _("DW_AT_low_pc %s is zero " | |
17053 | "for DIE at 0x%x [in module %s]"), | |
17054 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 17055 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
17056 | } |
17057 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
17058 | else if (part_die->lowpc >= part_die->highpc) | |
17059 | { | |
bb5ed363 | 17060 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17061 | |
17062 | complaint (&symfile_complaints, | |
17063 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
17064 | "for DIE at 0x%x [in module %s]"), | |
17065 | paddress (gdbarch, part_die->lowpc), | |
17066 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
17067 | to_underlying (part_die->sect_off), |
17068 | objfile_name (objfile)); | |
9373cf26 JK |
17069 | } |
17070 | else | |
17071 | part_die->has_pc_info = 1; | |
17072 | } | |
85cbf3d3 | 17073 | |
c906108c SS |
17074 | return info_ptr; |
17075 | } | |
17076 | ||
72bf9492 DJ |
17077 | /* Find a cached partial DIE at OFFSET in CU. */ |
17078 | ||
17079 | static struct partial_die_info * | |
9c541725 | 17080 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
17081 | { |
17082 | struct partial_die_info *lookup_die = NULL; | |
17083 | struct partial_die_info part_die; | |
17084 | ||
9c541725 | 17085 | part_die.sect_off = sect_off; |
9a3c8263 SM |
17086 | lookup_die = ((struct partial_die_info *) |
17087 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 17088 | to_underlying (sect_off))); |
72bf9492 | 17089 | |
72bf9492 DJ |
17090 | return lookup_die; |
17091 | } | |
17092 | ||
348e048f DE |
17093 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
17094 | except in the case of .debug_types DIEs which do not reference | |
17095 | outside their CU (they do however referencing other types via | |
55f1336d | 17096 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
17097 | |
17098 | static struct partial_die_info * | |
9c541725 | 17099 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 17100 | { |
bb5ed363 | 17101 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
17102 | struct dwarf2_per_cu_data *per_cu = NULL; |
17103 | struct partial_die_info *pd = NULL; | |
72bf9492 | 17104 | |
36586728 | 17105 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 17106 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 17107 | { |
9c541725 | 17108 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
17109 | if (pd != NULL) |
17110 | return pd; | |
0d99eb77 DE |
17111 | /* We missed recording what we needed. |
17112 | Load all dies and try again. */ | |
17113 | per_cu = cu->per_cu; | |
5afb4e99 | 17114 | } |
0d99eb77 DE |
17115 | else |
17116 | { | |
17117 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 17118 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 17119 | { |
9c541725 PA |
17120 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
17121 | " external reference to offset 0x%x [in module %s].\n"), | |
17122 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
17123 | bfd_get_filename (objfile->obfd)); |
17124 | } | |
9c541725 | 17125 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 17126 | objfile); |
72bf9492 | 17127 | |
0d99eb77 DE |
17128 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
17129 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 17130 | |
0d99eb77 | 17131 | per_cu->cu->last_used = 0; |
9c541725 | 17132 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 17133 | } |
5afb4e99 | 17134 | |
dee91e82 DE |
17135 | /* If we didn't find it, and not all dies have been loaded, |
17136 | load them all and try again. */ | |
17137 | ||
5afb4e99 DJ |
17138 | if (pd == NULL && per_cu->load_all_dies == 0) |
17139 | { | |
5afb4e99 | 17140 | per_cu->load_all_dies = 1; |
fd820528 DE |
17141 | |
17142 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
17143 | THIS_CU->cu may already be in use. So we can't just free it and | |
17144 | replace its DIEs with the ones we read in. Instead, we leave those | |
17145 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
17146 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
17147 | set. */ | |
dee91e82 | 17148 | load_partial_comp_unit (per_cu); |
5afb4e99 | 17149 | |
9c541725 | 17150 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
17151 | } |
17152 | ||
17153 | if (pd == NULL) | |
17154 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
17155 | _("could not find partial DIE 0x%x " |
17156 | "in cache [from module %s]\n"), | |
9c541725 | 17157 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 17158 | return pd; |
72bf9492 DJ |
17159 | } |
17160 | ||
abc72ce4 DE |
17161 | /* See if we can figure out if the class lives in a namespace. We do |
17162 | this by looking for a member function; its demangled name will | |
17163 | contain namespace info, if there is any. */ | |
17164 | ||
17165 | static void | |
17166 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
17167 | struct dwarf2_cu *cu) | |
17168 | { | |
17169 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
17170 | what template types look like, because the demangler | |
17171 | frequently doesn't give the same name as the debug info. We | |
17172 | could fix this by only using the demangled name to get the | |
17173 | prefix (but see comment in read_structure_type). */ | |
17174 | ||
17175 | struct partial_die_info *real_pdi; | |
17176 | struct partial_die_info *child_pdi; | |
17177 | ||
17178 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
17179 | we should not do this. We'll prepend the parent's fully qualified | |
17180 | name when we create the partial symbol. */ | |
17181 | ||
17182 | real_pdi = struct_pdi; | |
17183 | while (real_pdi->has_specification) | |
36586728 TT |
17184 | real_pdi = find_partial_die (real_pdi->spec_offset, |
17185 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
17186 | |
17187 | if (real_pdi->die_parent != NULL) | |
17188 | return; | |
17189 | ||
17190 | for (child_pdi = struct_pdi->die_child; | |
17191 | child_pdi != NULL; | |
17192 | child_pdi = child_pdi->die_sibling) | |
17193 | { | |
17194 | if (child_pdi->tag == DW_TAG_subprogram | |
17195 | && child_pdi->linkage_name != NULL) | |
17196 | { | |
17197 | char *actual_class_name | |
17198 | = language_class_name_from_physname (cu->language_defn, | |
17199 | child_pdi->linkage_name); | |
17200 | if (actual_class_name != NULL) | |
17201 | { | |
17202 | struct_pdi->name | |
224c3ddb SM |
17203 | = ((const char *) |
17204 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17205 | actual_class_name, | |
17206 | strlen (actual_class_name))); | |
abc72ce4 DE |
17207 | xfree (actual_class_name); |
17208 | } | |
17209 | break; | |
17210 | } | |
17211 | } | |
17212 | } | |
17213 | ||
72bf9492 DJ |
17214 | /* Adjust PART_DIE before generating a symbol for it. This function |
17215 | may set the is_external flag or change the DIE's name. */ | |
17216 | ||
17217 | static void | |
17218 | fixup_partial_die (struct partial_die_info *part_die, | |
17219 | struct dwarf2_cu *cu) | |
17220 | { | |
abc72ce4 DE |
17221 | /* Once we've fixed up a die, there's no point in doing so again. |
17222 | This also avoids a memory leak if we were to call | |
17223 | guess_partial_die_structure_name multiple times. */ | |
17224 | if (part_die->fixup_called) | |
17225 | return; | |
17226 | ||
72bf9492 DJ |
17227 | /* If we found a reference attribute and the DIE has no name, try |
17228 | to find a name in the referred to DIE. */ | |
17229 | ||
17230 | if (part_die->name == NULL && part_die->has_specification) | |
17231 | { | |
17232 | struct partial_die_info *spec_die; | |
72bf9492 | 17233 | |
36586728 TT |
17234 | spec_die = find_partial_die (part_die->spec_offset, |
17235 | part_die->spec_is_dwz, cu); | |
72bf9492 | 17236 | |
10b3939b | 17237 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
17238 | |
17239 | if (spec_die->name) | |
17240 | { | |
17241 | part_die->name = spec_die->name; | |
17242 | ||
17243 | /* Copy DW_AT_external attribute if it is set. */ | |
17244 | if (spec_die->is_external) | |
17245 | part_die->is_external = spec_die->is_external; | |
17246 | } | |
17247 | } | |
17248 | ||
17249 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
17250 | |
17251 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 17252 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 17253 | |
abc72ce4 DE |
17254 | /* If there is no parent die to provide a namespace, and there are |
17255 | children, see if we can determine the namespace from their linkage | |
122d1940 | 17256 | name. */ |
abc72ce4 | 17257 | if (cu->language == language_cplus |
8b70b953 | 17258 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17259 | && part_die->die_parent == NULL |
17260 | && part_die->has_children | |
17261 | && (part_die->tag == DW_TAG_class_type | |
17262 | || part_die->tag == DW_TAG_structure_type | |
17263 | || part_die->tag == DW_TAG_union_type)) | |
17264 | guess_partial_die_structure_name (part_die, cu); | |
17265 | ||
53832f31 TT |
17266 | /* GCC might emit a nameless struct or union that has a linkage |
17267 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17268 | if (part_die->name == NULL | |
96408a79 SA |
17269 | && (part_die->tag == DW_TAG_class_type |
17270 | || part_die->tag == DW_TAG_interface_type | |
17271 | || part_die->tag == DW_TAG_structure_type | |
17272 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
17273 | && part_die->linkage_name != NULL) |
17274 | { | |
17275 | char *demangled; | |
17276 | ||
8de20a37 | 17277 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
17278 | if (demangled) |
17279 | { | |
96408a79 SA |
17280 | const char *base; |
17281 | ||
17282 | /* Strip any leading namespaces/classes, keep only the base name. | |
17283 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17284 | base = strrchr (demangled, ':'); | |
17285 | if (base && base > demangled && base[-1] == ':') | |
17286 | base++; | |
17287 | else | |
17288 | base = demangled; | |
17289 | ||
34a68019 | 17290 | part_die->name |
224c3ddb SM |
17291 | = ((const char *) |
17292 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17293 | base, strlen (base))); | |
53832f31 TT |
17294 | xfree (demangled); |
17295 | } | |
17296 | } | |
17297 | ||
abc72ce4 | 17298 | part_die->fixup_called = 1; |
72bf9492 DJ |
17299 | } |
17300 | ||
a8329558 | 17301 | /* Read an attribute value described by an attribute form. */ |
c906108c | 17302 | |
d521ce57 | 17303 | static const gdb_byte * |
dee91e82 DE |
17304 | read_attribute_value (const struct die_reader_specs *reader, |
17305 | struct attribute *attr, unsigned form, | |
43988095 | 17306 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 17307 | { |
dee91e82 | 17308 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
17309 | struct objfile *objfile = cu->objfile; |
17310 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 17311 | bfd *abfd = reader->abfd; |
e7c27a73 | 17312 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17313 | unsigned int bytes_read; |
17314 | struct dwarf_block *blk; | |
17315 | ||
aead7601 | 17316 | attr->form = (enum dwarf_form) form; |
a8329558 | 17317 | switch (form) |
c906108c | 17318 | { |
c906108c | 17319 | case DW_FORM_ref_addr: |
ae411497 | 17320 | if (cu->header.version == 2) |
4568ecf9 | 17321 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 17322 | else |
4568ecf9 DE |
17323 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
17324 | &cu->header, &bytes_read); | |
ae411497 TT |
17325 | info_ptr += bytes_read; |
17326 | break; | |
36586728 TT |
17327 | case DW_FORM_GNU_ref_alt: |
17328 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17329 | info_ptr += bytes_read; | |
17330 | break; | |
ae411497 | 17331 | case DW_FORM_addr: |
e7c27a73 | 17332 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 17333 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 17334 | info_ptr += bytes_read; |
c906108c SS |
17335 | break; |
17336 | case DW_FORM_block2: | |
7b5a2f43 | 17337 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17338 | blk->size = read_2_bytes (abfd, info_ptr); |
17339 | info_ptr += 2; | |
17340 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17341 | info_ptr += blk->size; | |
17342 | DW_BLOCK (attr) = blk; | |
17343 | break; | |
17344 | case DW_FORM_block4: | |
7b5a2f43 | 17345 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17346 | blk->size = read_4_bytes (abfd, info_ptr); |
17347 | info_ptr += 4; | |
17348 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17349 | info_ptr += blk->size; | |
17350 | DW_BLOCK (attr) = blk; | |
17351 | break; | |
17352 | case DW_FORM_data2: | |
17353 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
17354 | info_ptr += 2; | |
17355 | break; | |
17356 | case DW_FORM_data4: | |
17357 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
17358 | info_ptr += 4; | |
17359 | break; | |
17360 | case DW_FORM_data8: | |
17361 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
17362 | info_ptr += 8; | |
17363 | break; | |
0224619f JK |
17364 | case DW_FORM_data16: |
17365 | blk = dwarf_alloc_block (cu); | |
17366 | blk->size = 16; | |
17367 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
17368 | info_ptr += 16; | |
17369 | DW_BLOCK (attr) = blk; | |
17370 | break; | |
2dc7f7b3 TT |
17371 | case DW_FORM_sec_offset: |
17372 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17373 | info_ptr += bytes_read; | |
17374 | break; | |
c906108c | 17375 | case DW_FORM_string: |
9b1c24c8 | 17376 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 17377 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
17378 | info_ptr += bytes_read; |
17379 | break; | |
4bdf3d34 | 17380 | case DW_FORM_strp: |
36586728 TT |
17381 | if (!cu->per_cu->is_dwz) |
17382 | { | |
17383 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
17384 | &bytes_read); | |
17385 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17386 | info_ptr += bytes_read; | |
17387 | break; | |
17388 | } | |
17389 | /* FALLTHROUGH */ | |
43988095 JK |
17390 | case DW_FORM_line_strp: |
17391 | if (!cu->per_cu->is_dwz) | |
17392 | { | |
17393 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
17394 | cu_header, &bytes_read); | |
17395 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17396 | info_ptr += bytes_read; | |
17397 | break; | |
17398 | } | |
17399 | /* FALLTHROUGH */ | |
36586728 TT |
17400 | case DW_FORM_GNU_strp_alt: |
17401 | { | |
17402 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17403 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
17404 | &bytes_read); | |
17405 | ||
17406 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
17407 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17408 | info_ptr += bytes_read; | |
17409 | } | |
4bdf3d34 | 17410 | break; |
2dc7f7b3 | 17411 | case DW_FORM_exprloc: |
c906108c | 17412 | case DW_FORM_block: |
7b5a2f43 | 17413 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17414 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17415 | info_ptr += bytes_read; | |
17416 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17417 | info_ptr += blk->size; | |
17418 | DW_BLOCK (attr) = blk; | |
17419 | break; | |
17420 | case DW_FORM_block1: | |
7b5a2f43 | 17421 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17422 | blk->size = read_1_byte (abfd, info_ptr); |
17423 | info_ptr += 1; | |
17424 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17425 | info_ptr += blk->size; | |
17426 | DW_BLOCK (attr) = blk; | |
17427 | break; | |
17428 | case DW_FORM_data1: | |
17429 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17430 | info_ptr += 1; | |
17431 | break; | |
17432 | case DW_FORM_flag: | |
17433 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17434 | info_ptr += 1; | |
17435 | break; | |
2dc7f7b3 TT |
17436 | case DW_FORM_flag_present: |
17437 | DW_UNSND (attr) = 1; | |
17438 | break; | |
c906108c SS |
17439 | case DW_FORM_sdata: |
17440 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17441 | info_ptr += bytes_read; | |
17442 | break; | |
17443 | case DW_FORM_udata: | |
17444 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17445 | info_ptr += bytes_read; | |
17446 | break; | |
17447 | case DW_FORM_ref1: | |
9c541725 | 17448 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17449 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
17450 | info_ptr += 1; |
17451 | break; | |
17452 | case DW_FORM_ref2: | |
9c541725 | 17453 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17454 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
17455 | info_ptr += 2; |
17456 | break; | |
17457 | case DW_FORM_ref4: | |
9c541725 | 17458 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17459 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
17460 | info_ptr += 4; |
17461 | break; | |
613e1657 | 17462 | case DW_FORM_ref8: |
9c541725 | 17463 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17464 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
17465 | info_ptr += 8; |
17466 | break; | |
55f1336d | 17467 | case DW_FORM_ref_sig8: |
ac9ec31b | 17468 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
17469 | info_ptr += 8; |
17470 | break; | |
c906108c | 17471 | case DW_FORM_ref_udata: |
9c541725 | 17472 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17473 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
17474 | info_ptr += bytes_read; |
17475 | break; | |
c906108c | 17476 | case DW_FORM_indirect: |
a8329558 KW |
17477 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17478 | info_ptr += bytes_read; | |
43988095 JK |
17479 | if (form == DW_FORM_implicit_const) |
17480 | { | |
17481 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17482 | info_ptr += bytes_read; | |
17483 | } | |
17484 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
17485 | info_ptr); | |
17486 | break; | |
17487 | case DW_FORM_implicit_const: | |
17488 | DW_SND (attr) = implicit_const; | |
a8329558 | 17489 | break; |
3019eac3 DE |
17490 | case DW_FORM_GNU_addr_index: |
17491 | if (reader->dwo_file == NULL) | |
17492 | { | |
17493 | /* For now flag a hard error. | |
17494 | Later we can turn this into a complaint. */ | |
17495 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17496 | dwarf_form_name (form), | |
17497 | bfd_get_filename (abfd)); | |
17498 | } | |
17499 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
17500 | info_ptr += bytes_read; | |
17501 | break; | |
17502 | case DW_FORM_GNU_str_index: | |
17503 | if (reader->dwo_file == NULL) | |
17504 | { | |
17505 | /* For now flag a hard error. | |
17506 | Later we can turn this into a complaint if warranted. */ | |
17507 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17508 | dwarf_form_name (form), | |
17509 | bfd_get_filename (abfd)); | |
17510 | } | |
17511 | { | |
17512 | ULONGEST str_index = | |
17513 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17514 | ||
342587c4 | 17515 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
17516 | DW_STRING_IS_CANONICAL (attr) = 0; |
17517 | info_ptr += bytes_read; | |
17518 | } | |
17519 | break; | |
c906108c | 17520 | default: |
8a3fe4f8 | 17521 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
17522 | dwarf_form_name (form), |
17523 | bfd_get_filename (abfd)); | |
c906108c | 17524 | } |
28e94949 | 17525 | |
36586728 | 17526 | /* Super hack. */ |
7771576e | 17527 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
17528 | attr->form = DW_FORM_GNU_ref_alt; |
17529 | ||
28e94949 JB |
17530 | /* We have seen instances where the compiler tried to emit a byte |
17531 | size attribute of -1 which ended up being encoded as an unsigned | |
17532 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
17533 | an object of this size seems pretty unlikely so we can relatively | |
17534 | safely treat these cases as if the size attribute was invalid and | |
17535 | treat them as zero by default. */ | |
17536 | if (attr->name == DW_AT_byte_size | |
17537 | && form == DW_FORM_data4 | |
17538 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
17539 | { |
17540 | complaint | |
17541 | (&symfile_complaints, | |
43bbcdc2 PH |
17542 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
17543 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
17544 | DW_UNSND (attr) = 0; |
17545 | } | |
28e94949 | 17546 | |
c906108c SS |
17547 | return info_ptr; |
17548 | } | |
17549 | ||
a8329558 KW |
17550 | /* Read an attribute described by an abbreviated attribute. */ |
17551 | ||
d521ce57 | 17552 | static const gdb_byte * |
dee91e82 DE |
17553 | read_attribute (const struct die_reader_specs *reader, |
17554 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 17555 | const gdb_byte *info_ptr) |
a8329558 KW |
17556 | { |
17557 | attr->name = abbrev->name; | |
43988095 JK |
17558 | return read_attribute_value (reader, attr, abbrev->form, |
17559 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
17560 | } |
17561 | ||
0963b4bd | 17562 | /* Read dwarf information from a buffer. */ |
c906108c SS |
17563 | |
17564 | static unsigned int | |
a1855c1d | 17565 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17566 | { |
fe1b8b76 | 17567 | return bfd_get_8 (abfd, buf); |
c906108c SS |
17568 | } |
17569 | ||
17570 | static int | |
a1855c1d | 17571 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17572 | { |
fe1b8b76 | 17573 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
17574 | } |
17575 | ||
17576 | static unsigned int | |
a1855c1d | 17577 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17578 | { |
fe1b8b76 | 17579 | return bfd_get_16 (abfd, buf); |
c906108c SS |
17580 | } |
17581 | ||
21ae7a4d | 17582 | static int |
a1855c1d | 17583 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17584 | { |
17585 | return bfd_get_signed_16 (abfd, buf); | |
17586 | } | |
17587 | ||
c906108c | 17588 | static unsigned int |
a1855c1d | 17589 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17590 | { |
fe1b8b76 | 17591 | return bfd_get_32 (abfd, buf); |
c906108c SS |
17592 | } |
17593 | ||
21ae7a4d | 17594 | static int |
a1855c1d | 17595 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17596 | { |
17597 | return bfd_get_signed_32 (abfd, buf); | |
17598 | } | |
17599 | ||
93311388 | 17600 | static ULONGEST |
a1855c1d | 17601 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17602 | { |
fe1b8b76 | 17603 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17604 | } |
17605 | ||
17606 | static CORE_ADDR | |
d521ce57 | 17607 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17608 | unsigned int *bytes_read) |
c906108c | 17609 | { |
e7c27a73 | 17610 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17611 | CORE_ADDR retval = 0; |
17612 | ||
107d2387 | 17613 | if (cu_header->signed_addr_p) |
c906108c | 17614 | { |
107d2387 AC |
17615 | switch (cu_header->addr_size) |
17616 | { | |
17617 | case 2: | |
fe1b8b76 | 17618 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17619 | break; |
17620 | case 4: | |
fe1b8b76 | 17621 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17622 | break; |
17623 | case 8: | |
fe1b8b76 | 17624 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17625 | break; |
17626 | default: | |
8e65ff28 | 17627 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17628 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17629 | bfd_get_filename (abfd)); |
107d2387 AC |
17630 | } |
17631 | } | |
17632 | else | |
17633 | { | |
17634 | switch (cu_header->addr_size) | |
17635 | { | |
17636 | case 2: | |
fe1b8b76 | 17637 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17638 | break; |
17639 | case 4: | |
fe1b8b76 | 17640 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17641 | break; |
17642 | case 8: | |
fe1b8b76 | 17643 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17644 | break; |
17645 | default: | |
8e65ff28 | 17646 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17647 | _("read_address: bad switch, " |
17648 | "unsigned [in module %s]"), | |
659b0389 | 17649 | bfd_get_filename (abfd)); |
107d2387 | 17650 | } |
c906108c | 17651 | } |
64367e0a | 17652 | |
107d2387 AC |
17653 | *bytes_read = cu_header->addr_size; |
17654 | return retval; | |
c906108c SS |
17655 | } |
17656 | ||
f7ef9339 | 17657 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17658 | specification allows the initial length to take up either 4 bytes |
17659 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17660 | bytes describe the length and all offsets will be 8 bytes in length | |
17661 | instead of 4. | |
17662 | ||
f7ef9339 KB |
17663 | An older, non-standard 64-bit format is also handled by this |
17664 | function. The older format in question stores the initial length | |
17665 | as an 8-byte quantity without an escape value. Lengths greater | |
17666 | than 2^32 aren't very common which means that the initial 4 bytes | |
17667 | is almost always zero. Since a length value of zero doesn't make | |
17668 | sense for the 32-bit format, this initial zero can be considered to | |
17669 | be an escape value which indicates the presence of the older 64-bit | |
17670 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
17671 | greater than 4GB. If it becomes necessary to handle lengths |
17672 | somewhat larger than 4GB, we could allow other small values (such | |
17673 | as the non-sensical values of 1, 2, and 3) to also be used as | |
17674 | escape values indicating the presence of the old format. | |
f7ef9339 | 17675 | |
917c78fc MK |
17676 | The value returned via bytes_read should be used to increment the |
17677 | relevant pointer after calling read_initial_length(). | |
c764a876 | 17678 | |
613e1657 KB |
17679 | [ Note: read_initial_length() and read_offset() are based on the |
17680 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 17681 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
17682 | from: |
17683 | ||
f7ef9339 | 17684 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 17685 | |
613e1657 KB |
17686 | This document is only a draft and is subject to change. (So beware.) |
17687 | ||
f7ef9339 | 17688 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
17689 | determined empirically by examining 64-bit ELF files produced by |
17690 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
17691 | |
17692 | - Kevin, July 16, 2002 | |
613e1657 KB |
17693 | ] */ |
17694 | ||
17695 | static LONGEST | |
d521ce57 | 17696 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 17697 | { |
fe1b8b76 | 17698 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 17699 | |
dd373385 | 17700 | if (length == 0xffffffff) |
613e1657 | 17701 | { |
fe1b8b76 | 17702 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 17703 | *bytes_read = 12; |
613e1657 | 17704 | } |
dd373385 | 17705 | else if (length == 0) |
f7ef9339 | 17706 | { |
dd373385 | 17707 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 17708 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 17709 | *bytes_read = 8; |
f7ef9339 | 17710 | } |
613e1657 KB |
17711 | else |
17712 | { | |
17713 | *bytes_read = 4; | |
613e1657 KB |
17714 | } |
17715 | ||
c764a876 DE |
17716 | return length; |
17717 | } | |
dd373385 | 17718 | |
c764a876 DE |
17719 | /* Cover function for read_initial_length. |
17720 | Returns the length of the object at BUF, and stores the size of the | |
17721 | initial length in *BYTES_READ and stores the size that offsets will be in | |
17722 | *OFFSET_SIZE. | |
17723 | If the initial length size is not equivalent to that specified in | |
17724 | CU_HEADER then issue a complaint. | |
17725 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 17726 | |
c764a876 | 17727 | static LONGEST |
d521ce57 | 17728 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
17729 | const struct comp_unit_head *cu_header, |
17730 | unsigned int *bytes_read, | |
17731 | unsigned int *offset_size) | |
17732 | { | |
17733 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
17734 | ||
17735 | gdb_assert (cu_header->initial_length_size == 4 | |
17736 | || cu_header->initial_length_size == 8 | |
17737 | || cu_header->initial_length_size == 12); | |
17738 | ||
17739 | if (cu_header->initial_length_size != *bytes_read) | |
17740 | complaint (&symfile_complaints, | |
17741 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 17742 | |
c764a876 | 17743 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 17744 | return length; |
613e1657 KB |
17745 | } |
17746 | ||
17747 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 17748 | given by cu_header->offset_size. */ |
613e1657 KB |
17749 | |
17750 | static LONGEST | |
d521ce57 TT |
17751 | read_offset (bfd *abfd, const gdb_byte *buf, |
17752 | const struct comp_unit_head *cu_header, | |
891d2f0b | 17753 | unsigned int *bytes_read) |
c764a876 DE |
17754 | { |
17755 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 17756 | |
c764a876 DE |
17757 | *bytes_read = cu_header->offset_size; |
17758 | return offset; | |
17759 | } | |
17760 | ||
17761 | /* Read an offset from the data stream. */ | |
17762 | ||
17763 | static LONGEST | |
d521ce57 | 17764 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
17765 | { |
17766 | LONGEST retval = 0; | |
17767 | ||
c764a876 | 17768 | switch (offset_size) |
613e1657 KB |
17769 | { |
17770 | case 4: | |
fe1b8b76 | 17771 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
17772 | break; |
17773 | case 8: | |
fe1b8b76 | 17774 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
17775 | break; |
17776 | default: | |
8e65ff28 | 17777 | internal_error (__FILE__, __LINE__, |
c764a876 | 17778 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 17779 | bfd_get_filename (abfd)); |
613e1657 KB |
17780 | } |
17781 | ||
917c78fc | 17782 | return retval; |
613e1657 KB |
17783 | } |
17784 | ||
d521ce57 TT |
17785 | static const gdb_byte * |
17786 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
17787 | { |
17788 | /* If the size of a host char is 8 bits, we can return a pointer | |
17789 | to the buffer, otherwise we have to copy the data to a buffer | |
17790 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17791 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 17792 | return buf; |
c906108c SS |
17793 | } |
17794 | ||
d521ce57 TT |
17795 | static const char * |
17796 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
17797 | unsigned int *bytes_read_ptr) | |
c906108c SS |
17798 | { |
17799 | /* If the size of a host char is 8 bits, we can return a pointer | |
17800 | to the string, otherwise we have to copy the string to a buffer | |
17801 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17802 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
17803 | if (*buf == '\0') |
17804 | { | |
17805 | *bytes_read_ptr = 1; | |
17806 | return NULL; | |
17807 | } | |
d521ce57 TT |
17808 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
17809 | return (const char *) buf; | |
4bdf3d34 JJ |
17810 | } |
17811 | ||
43988095 JK |
17812 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
17813 | reporting strings FORM_NAME and SECT_NAME. */ | |
17814 | ||
d521ce57 | 17815 | static const char * |
43988095 JK |
17816 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
17817 | struct dwarf2_section_info *sect, | |
17818 | const char *form_name, | |
17819 | const char *sect_name) | |
17820 | { | |
17821 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
17822 | if (sect->buffer == NULL) | |
17823 | error (_("%s used without %s section [in module %s]"), | |
17824 | form_name, sect_name, bfd_get_filename (abfd)); | |
17825 | if (str_offset >= sect->size) | |
17826 | error (_("%s pointing outside of %s section [in module %s]"), | |
17827 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 17828 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 17829 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 17830 | return NULL; |
43988095 JK |
17831 | return (const char *) (sect->buffer + str_offset); |
17832 | } | |
17833 | ||
17834 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
17835 | ||
17836 | static const char * | |
17837 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17838 | { | |
17839 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17840 | &dwarf2_per_objfile->str, | |
17841 | "DW_FORM_strp", ".debug_str"); | |
17842 | } | |
17843 | ||
17844 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
17845 | ||
17846 | static const char * | |
17847 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17848 | { | |
17849 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17850 | &dwarf2_per_objfile->line_str, | |
17851 | "DW_FORM_line_strp", | |
17852 | ".debug_line_str"); | |
c906108c SS |
17853 | } |
17854 | ||
36586728 TT |
17855 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
17856 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
17857 | the string consists of a single NUL byte, return NULL; otherwise | |
17858 | return a pointer to the string. */ | |
17859 | ||
d521ce57 | 17860 | static const char * |
36586728 TT |
17861 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
17862 | { | |
17863 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
17864 | ||
17865 | if (dwz->str.buffer == NULL) | |
17866 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
17867 | "section [in module %s]"), | |
17868 | bfd_get_filename (dwz->dwz_bfd)); | |
17869 | if (str_offset >= dwz->str.size) | |
17870 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
17871 | ".debug_str section [in module %s]"), | |
17872 | bfd_get_filename (dwz->dwz_bfd)); | |
17873 | gdb_assert (HOST_CHAR_BIT == 8); | |
17874 | if (dwz->str.buffer[str_offset] == '\0') | |
17875 | return NULL; | |
d521ce57 | 17876 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
17877 | } |
17878 | ||
43988095 JK |
17879 | /* Return pointer to string at .debug_str offset as read from BUF. |
17880 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17881 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17882 | ||
d521ce57 TT |
17883 | static const char * |
17884 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
17885 | const struct comp_unit_head *cu_header, |
17886 | unsigned int *bytes_read_ptr) | |
17887 | { | |
17888 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17889 | ||
17890 | return read_indirect_string_at_offset (abfd, str_offset); | |
17891 | } | |
17892 | ||
43988095 JK |
17893 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
17894 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17895 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17896 | ||
17897 | static const char * | |
17898 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
17899 | const struct comp_unit_head *cu_header, | |
17900 | unsigned int *bytes_read_ptr) | |
17901 | { | |
17902 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17903 | ||
17904 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
17905 | } | |
17906 | ||
17907 | ULONGEST | |
d521ce57 | 17908 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 17909 | unsigned int *bytes_read_ptr) |
c906108c | 17910 | { |
12df843f | 17911 | ULONGEST result; |
ce5d95e1 | 17912 | unsigned int num_read; |
870f88f7 | 17913 | int shift; |
c906108c SS |
17914 | unsigned char byte; |
17915 | ||
17916 | result = 0; | |
17917 | shift = 0; | |
17918 | num_read = 0; | |
c906108c SS |
17919 | while (1) |
17920 | { | |
fe1b8b76 | 17921 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17922 | buf++; |
17923 | num_read++; | |
12df843f | 17924 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
17925 | if ((byte & 128) == 0) |
17926 | { | |
17927 | break; | |
17928 | } | |
17929 | shift += 7; | |
17930 | } | |
17931 | *bytes_read_ptr = num_read; | |
17932 | return result; | |
17933 | } | |
17934 | ||
12df843f | 17935 | static LONGEST |
d521ce57 TT |
17936 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
17937 | unsigned int *bytes_read_ptr) | |
c906108c | 17938 | { |
12df843f | 17939 | LONGEST result; |
870f88f7 | 17940 | int shift, num_read; |
c906108c SS |
17941 | unsigned char byte; |
17942 | ||
17943 | result = 0; | |
17944 | shift = 0; | |
c906108c | 17945 | num_read = 0; |
c906108c SS |
17946 | while (1) |
17947 | { | |
fe1b8b76 | 17948 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17949 | buf++; |
17950 | num_read++; | |
12df843f | 17951 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
17952 | shift += 7; |
17953 | if ((byte & 128) == 0) | |
17954 | { | |
17955 | break; | |
17956 | } | |
17957 | } | |
77e0b926 | 17958 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 17959 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
17960 | *bytes_read_ptr = num_read; |
17961 | return result; | |
17962 | } | |
17963 | ||
3019eac3 DE |
17964 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
17965 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
17966 | ADDR_SIZE is the size of addresses from the CU header. */ | |
17967 | ||
17968 | static CORE_ADDR | |
17969 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
17970 | { | |
17971 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17972 | bfd *abfd = objfile->obfd; | |
17973 | const gdb_byte *info_ptr; | |
17974 | ||
17975 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
17976 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
17977 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 17978 | objfile_name (objfile)); |
3019eac3 DE |
17979 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
17980 | error (_("DW_FORM_addr_index pointing outside of " | |
17981 | ".debug_addr section [in module %s]"), | |
4262abfb | 17982 | objfile_name (objfile)); |
3019eac3 DE |
17983 | info_ptr = (dwarf2_per_objfile->addr.buffer |
17984 | + addr_base + addr_index * addr_size); | |
17985 | if (addr_size == 4) | |
17986 | return bfd_get_32 (abfd, info_ptr); | |
17987 | else | |
17988 | return bfd_get_64 (abfd, info_ptr); | |
17989 | } | |
17990 | ||
17991 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
17992 | ||
17993 | static CORE_ADDR | |
17994 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
17995 | { | |
17996 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
17997 | } | |
17998 | ||
17999 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
18000 | ||
18001 | static CORE_ADDR | |
d521ce57 | 18002 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
18003 | unsigned int *bytes_read) |
18004 | { | |
18005 | bfd *abfd = cu->objfile->obfd; | |
18006 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
18007 | ||
18008 | return read_addr_index (cu, addr_index); | |
18009 | } | |
18010 | ||
18011 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
18012 | back to dwarf2_read_addr_index. */ | |
18013 | ||
18014 | struct dwarf2_read_addr_index_data | |
18015 | { | |
18016 | ULONGEST addr_base; | |
18017 | int addr_size; | |
18018 | }; | |
18019 | ||
18020 | /* die_reader_func for dwarf2_read_addr_index. */ | |
18021 | ||
18022 | static void | |
18023 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 18024 | const gdb_byte *info_ptr, |
3019eac3 DE |
18025 | struct die_info *comp_unit_die, |
18026 | int has_children, | |
18027 | void *data) | |
18028 | { | |
18029 | struct dwarf2_cu *cu = reader->cu; | |
18030 | struct dwarf2_read_addr_index_data *aidata = | |
18031 | (struct dwarf2_read_addr_index_data *) data; | |
18032 | ||
18033 | aidata->addr_base = cu->addr_base; | |
18034 | aidata->addr_size = cu->header.addr_size; | |
18035 | } | |
18036 | ||
18037 | /* Given an index in .debug_addr, fetch the value. | |
18038 | NOTE: This can be called during dwarf expression evaluation, | |
18039 | long after the debug information has been read, and thus per_cu->cu | |
18040 | may no longer exist. */ | |
18041 | ||
18042 | CORE_ADDR | |
18043 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
18044 | unsigned int addr_index) | |
18045 | { | |
18046 | struct objfile *objfile = per_cu->objfile; | |
18047 | struct dwarf2_cu *cu = per_cu->cu; | |
18048 | ULONGEST addr_base; | |
18049 | int addr_size; | |
18050 | ||
18051 | /* This is intended to be called from outside this file. */ | |
18052 | dw2_setup (objfile); | |
18053 | ||
18054 | /* We need addr_base and addr_size. | |
18055 | If we don't have PER_CU->cu, we have to get it. | |
18056 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18057 | which at this point doesn't seem justified: it's not clear how frequently | |
18058 | it would get used and it would increase the size of every PER_CU. | |
18059 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18060 | so we're not in uncharted territory here. | |
18061 | Alas we need to be a bit more complicated as addr_base is contained | |
18062 | in the DIE. | |
18063 | ||
18064 | We don't need to read the entire CU(/TU). | |
18065 | We just need the header and top level die. | |
a1b64ce1 | 18066 | |
3019eac3 | 18067 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18068 | For now we skip this optimization. */ |
3019eac3 DE |
18069 | |
18070 | if (cu != NULL) | |
18071 | { | |
18072 | addr_base = cu->addr_base; | |
18073 | addr_size = cu->header.addr_size; | |
18074 | } | |
18075 | else | |
18076 | { | |
18077 | struct dwarf2_read_addr_index_data aidata; | |
18078 | ||
a1b64ce1 DE |
18079 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
18080 | we need addr_base. */ | |
18081 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
18082 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
18083 | addr_base = aidata.addr_base; |
18084 | addr_size = aidata.addr_size; | |
18085 | } | |
18086 | ||
18087 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
18088 | } | |
18089 | ||
57d63ce2 DE |
18090 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
18091 | This is only used by the Fission support. */ | |
3019eac3 | 18092 | |
d521ce57 | 18093 | static const char * |
342587c4 | 18094 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
18095 | { |
18096 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 18097 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18098 | bfd *abfd = objfile->obfd; |
342587c4 | 18099 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
18100 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
18101 | struct dwarf2_section_info *str_offsets_section = | |
18102 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 18103 | const gdb_byte *info_ptr; |
3019eac3 | 18104 | ULONGEST str_offset; |
57d63ce2 | 18105 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 18106 | |
73869dc2 DE |
18107 | dwarf2_read_section (objfile, str_section); |
18108 | dwarf2_read_section (objfile, str_offsets_section); | |
18109 | if (str_section->buffer == NULL) | |
57d63ce2 | 18110 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
18111 | " in CU at offset 0x%x [in module %s]"), |
18112 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18113 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 18114 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
18115 | " in CU at offset 0x%x [in module %s]"), |
18116 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18117 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 18118 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
18119 | " section in CU at offset 0x%x [in module %s]"), |
18120 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18121 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
18122 | + str_index * cu->header.offset_size); |
18123 | if (cu->header.offset_size == 4) | |
18124 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18125 | else | |
18126 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18127 | if (str_offset >= str_section->size) |
57d63ce2 | 18128 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
18129 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
18130 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18131 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
18132 | } |
18133 | ||
3019eac3 DE |
18134 | /* Return the length of an LEB128 number in BUF. */ |
18135 | ||
18136 | static int | |
18137 | leb128_size (const gdb_byte *buf) | |
18138 | { | |
18139 | const gdb_byte *begin = buf; | |
18140 | gdb_byte byte; | |
18141 | ||
18142 | while (1) | |
18143 | { | |
18144 | byte = *buf++; | |
18145 | if ((byte & 128) == 0) | |
18146 | return buf - begin; | |
18147 | } | |
18148 | } | |
18149 | ||
c906108c | 18150 | static void |
e142c38c | 18151 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
18152 | { |
18153 | switch (lang) | |
18154 | { | |
18155 | case DW_LANG_C89: | |
76bee0cc | 18156 | case DW_LANG_C99: |
0cfd832f | 18157 | case DW_LANG_C11: |
c906108c | 18158 | case DW_LANG_C: |
d1be3247 | 18159 | case DW_LANG_UPC: |
e142c38c | 18160 | cu->language = language_c; |
c906108c | 18161 | break; |
9c37b5ae | 18162 | case DW_LANG_Java: |
c906108c | 18163 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
18164 | case DW_LANG_C_plus_plus_11: |
18165 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 18166 | cu->language = language_cplus; |
c906108c | 18167 | break; |
6aecb9c2 JB |
18168 | case DW_LANG_D: |
18169 | cu->language = language_d; | |
18170 | break; | |
c906108c SS |
18171 | case DW_LANG_Fortran77: |
18172 | case DW_LANG_Fortran90: | |
b21b22e0 | 18173 | case DW_LANG_Fortran95: |
f7de9aab MW |
18174 | case DW_LANG_Fortran03: |
18175 | case DW_LANG_Fortran08: | |
e142c38c | 18176 | cu->language = language_fortran; |
c906108c | 18177 | break; |
a766d390 DE |
18178 | case DW_LANG_Go: |
18179 | cu->language = language_go; | |
18180 | break; | |
c906108c | 18181 | case DW_LANG_Mips_Assembler: |
e142c38c | 18182 | cu->language = language_asm; |
c906108c SS |
18183 | break; |
18184 | case DW_LANG_Ada83: | |
8aaf0b47 | 18185 | case DW_LANG_Ada95: |
bc5f45f8 JB |
18186 | cu->language = language_ada; |
18187 | break; | |
72019c9c GM |
18188 | case DW_LANG_Modula2: |
18189 | cu->language = language_m2; | |
18190 | break; | |
fe8e67fd PM |
18191 | case DW_LANG_Pascal83: |
18192 | cu->language = language_pascal; | |
18193 | break; | |
22566fbd DJ |
18194 | case DW_LANG_ObjC: |
18195 | cu->language = language_objc; | |
18196 | break; | |
c44af4eb TT |
18197 | case DW_LANG_Rust: |
18198 | case DW_LANG_Rust_old: | |
18199 | cu->language = language_rust; | |
18200 | break; | |
c906108c SS |
18201 | case DW_LANG_Cobol74: |
18202 | case DW_LANG_Cobol85: | |
c906108c | 18203 | default: |
e142c38c | 18204 | cu->language = language_minimal; |
c906108c SS |
18205 | break; |
18206 | } | |
e142c38c | 18207 | cu->language_defn = language_def (cu->language); |
c906108c SS |
18208 | } |
18209 | ||
18210 | /* Return the named attribute or NULL if not there. */ | |
18211 | ||
18212 | static struct attribute * | |
e142c38c | 18213 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 18214 | { |
a48e046c | 18215 | for (;;) |
c906108c | 18216 | { |
a48e046c TT |
18217 | unsigned int i; |
18218 | struct attribute *spec = NULL; | |
18219 | ||
18220 | for (i = 0; i < die->num_attrs; ++i) | |
18221 | { | |
18222 | if (die->attrs[i].name == name) | |
18223 | return &die->attrs[i]; | |
18224 | if (die->attrs[i].name == DW_AT_specification | |
18225 | || die->attrs[i].name == DW_AT_abstract_origin) | |
18226 | spec = &die->attrs[i]; | |
18227 | } | |
18228 | ||
18229 | if (!spec) | |
18230 | break; | |
c906108c | 18231 | |
f2f0e013 | 18232 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 18233 | } |
c5aa993b | 18234 | |
c906108c SS |
18235 | return NULL; |
18236 | } | |
18237 | ||
348e048f DE |
18238 | /* Return the named attribute or NULL if not there, |
18239 | but do not follow DW_AT_specification, etc. | |
18240 | This is for use in contexts where we're reading .debug_types dies. | |
18241 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
18242 | back up the chain, and we want to go down. */ | |
18243 | ||
18244 | static struct attribute * | |
45e58e77 | 18245 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
18246 | { |
18247 | unsigned int i; | |
18248 | ||
18249 | for (i = 0; i < die->num_attrs; ++i) | |
18250 | if (die->attrs[i].name == name) | |
18251 | return &die->attrs[i]; | |
18252 | ||
18253 | return NULL; | |
18254 | } | |
18255 | ||
7d45c7c3 KB |
18256 | /* Return the string associated with a string-typed attribute, or NULL if it |
18257 | is either not found or is of an incorrect type. */ | |
18258 | ||
18259 | static const char * | |
18260 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
18261 | { | |
18262 | struct attribute *attr; | |
18263 | const char *str = NULL; | |
18264 | ||
18265 | attr = dwarf2_attr (die, name, cu); | |
18266 | ||
18267 | if (attr != NULL) | |
18268 | { | |
43988095 | 18269 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
18270 | || attr->form == DW_FORM_string |
18271 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 18272 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
18273 | str = DW_STRING (attr); |
18274 | else | |
18275 | complaint (&symfile_complaints, | |
18276 | _("string type expected for attribute %s for " | |
18277 | "DIE at 0x%x in module %s"), | |
9c541725 | 18278 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
18279 | objfile_name (cu->objfile)); |
18280 | } | |
18281 | ||
18282 | return str; | |
18283 | } | |
18284 | ||
05cf31d1 JB |
18285 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
18286 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 18287 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
18288 | |
18289 | static int | |
18290 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
18291 | { | |
18292 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
18293 | ||
18294 | return (attr && DW_UNSND (attr)); | |
18295 | } | |
18296 | ||
3ca72b44 | 18297 | static int |
e142c38c | 18298 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 18299 | { |
05cf31d1 JB |
18300 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
18301 | which value is non-zero. However, we have to be careful with | |
18302 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
18303 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
18304 | end up accidently finding a declaration attribute that belongs | |
18305 | to a different DIE referenced by the specification attribute, | |
18306 | even though the given DIE does not have a declaration attribute. */ | |
18307 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
18308 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
18309 | } |
18310 | ||
63d06c5c | 18311 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 18312 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
18313 | containing the return value on output. If there is no |
18314 | specification, but there is an abstract origin, that is | |
18315 | returned. */ | |
63d06c5c DC |
18316 | |
18317 | static struct die_info * | |
f2f0e013 | 18318 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 18319 | { |
f2f0e013 DJ |
18320 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
18321 | *spec_cu); | |
63d06c5c | 18322 | |
edb3359d DJ |
18323 | if (spec_attr == NULL) |
18324 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
18325 | ||
63d06c5c DC |
18326 | if (spec_attr == NULL) |
18327 | return NULL; | |
18328 | else | |
f2f0e013 | 18329 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 18330 | } |
c906108c | 18331 | |
527f3840 JK |
18332 | /* Stub for free_line_header to match void * callback types. */ |
18333 | ||
18334 | static void | |
18335 | free_line_header_voidp (void *arg) | |
18336 | { | |
9a3c8263 | 18337 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 18338 | |
fff8551c | 18339 | delete lh; |
527f3840 JK |
18340 | } |
18341 | ||
fff8551c PA |
18342 | void |
18343 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 18344 | { |
27e0867f | 18345 | if (dwarf_line_debug >= 2) |
fff8551c PA |
18346 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
18347 | include_dirs.size () + 1, include_dir); | |
27e0867f | 18348 | |
fff8551c | 18349 | include_dirs.push_back (include_dir); |
debd256d | 18350 | } |
6e70227d | 18351 | |
fff8551c PA |
18352 | void |
18353 | line_header::add_file_name (const char *name, | |
ecfb656c | 18354 | dir_index d_index, |
fff8551c PA |
18355 | unsigned int mod_time, |
18356 | unsigned int length) | |
debd256d | 18357 | { |
27e0867f DE |
18358 | if (dwarf_line_debug >= 2) |
18359 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 18360 | (unsigned) file_names.size () + 1, name); |
27e0867f | 18361 | |
ecfb656c | 18362 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 18363 | } |
6e70227d | 18364 | |
83769d0b | 18365 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
18366 | |
18367 | static struct dwarf2_section_info * | |
18368 | get_debug_line_section (struct dwarf2_cu *cu) | |
18369 | { | |
18370 | struct dwarf2_section_info *section; | |
18371 | ||
18372 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
18373 | DWO file. */ | |
18374 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
18375 | section = &cu->dwo_unit->dwo_file->sections.line; | |
18376 | else if (cu->per_cu->is_dwz) | |
18377 | { | |
18378 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18379 | ||
18380 | section = &dwz->line; | |
18381 | } | |
18382 | else | |
18383 | section = &dwarf2_per_objfile->line; | |
18384 | ||
18385 | return section; | |
18386 | } | |
18387 | ||
43988095 JK |
18388 | /* Read directory or file name entry format, starting with byte of |
18389 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
18390 | entries count and the entries themselves in the described entry | |
18391 | format. */ | |
18392 | ||
18393 | static void | |
18394 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
18395 | struct line_header *lh, | |
18396 | const struct comp_unit_head *cu_header, | |
18397 | void (*callback) (struct line_header *lh, | |
18398 | const char *name, | |
ecfb656c | 18399 | dir_index d_index, |
43988095 JK |
18400 | unsigned int mod_time, |
18401 | unsigned int length)) | |
18402 | { | |
18403 | gdb_byte format_count, formati; | |
18404 | ULONGEST data_count, datai; | |
18405 | const gdb_byte *buf = *bufp; | |
18406 | const gdb_byte *format_header_data; | |
18407 | int i; | |
18408 | unsigned int bytes_read; | |
18409 | ||
18410 | format_count = read_1_byte (abfd, buf); | |
18411 | buf += 1; | |
18412 | format_header_data = buf; | |
18413 | for (formati = 0; formati < format_count; formati++) | |
18414 | { | |
18415 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18416 | buf += bytes_read; | |
18417 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18418 | buf += bytes_read; | |
18419 | } | |
18420 | ||
18421 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18422 | buf += bytes_read; | |
18423 | for (datai = 0; datai < data_count; datai++) | |
18424 | { | |
18425 | const gdb_byte *format = format_header_data; | |
18426 | struct file_entry fe; | |
18427 | ||
43988095 JK |
18428 | for (formati = 0; formati < format_count; formati++) |
18429 | { | |
ecfb656c | 18430 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18431 | format += bytes_read; |
43988095 | 18432 | |
ecfb656c | 18433 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18434 | format += bytes_read; |
ecfb656c PA |
18435 | |
18436 | gdb::optional<const char *> string; | |
18437 | gdb::optional<unsigned int> uint; | |
18438 | ||
43988095 JK |
18439 | switch (form) |
18440 | { | |
18441 | case DW_FORM_string: | |
ecfb656c | 18442 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
18443 | buf += bytes_read; |
18444 | break; | |
18445 | ||
18446 | case DW_FORM_line_strp: | |
ecfb656c PA |
18447 | string.emplace (read_indirect_line_string (abfd, buf, |
18448 | cu_header, | |
18449 | &bytes_read)); | |
43988095 JK |
18450 | buf += bytes_read; |
18451 | break; | |
18452 | ||
18453 | case DW_FORM_data1: | |
ecfb656c | 18454 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
18455 | buf += 1; |
18456 | break; | |
18457 | ||
18458 | case DW_FORM_data2: | |
ecfb656c | 18459 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
18460 | buf += 2; |
18461 | break; | |
18462 | ||
18463 | case DW_FORM_data4: | |
ecfb656c | 18464 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
18465 | buf += 4; |
18466 | break; | |
18467 | ||
18468 | case DW_FORM_data8: | |
ecfb656c | 18469 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
18470 | buf += 8; |
18471 | break; | |
18472 | ||
18473 | case DW_FORM_udata: | |
ecfb656c | 18474 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
18475 | buf += bytes_read; |
18476 | break; | |
18477 | ||
18478 | case DW_FORM_block: | |
18479 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
18480 | current GDB. */ | |
18481 | break; | |
18482 | } | |
ecfb656c PA |
18483 | |
18484 | switch (content_type) | |
18485 | { | |
18486 | case DW_LNCT_path: | |
18487 | if (string.has_value ()) | |
18488 | fe.name = *string; | |
18489 | break; | |
18490 | case DW_LNCT_directory_index: | |
18491 | if (uint.has_value ()) | |
18492 | fe.d_index = (dir_index) *uint; | |
18493 | break; | |
18494 | case DW_LNCT_timestamp: | |
18495 | if (uint.has_value ()) | |
18496 | fe.mod_time = *uint; | |
18497 | break; | |
18498 | case DW_LNCT_size: | |
18499 | if (uint.has_value ()) | |
18500 | fe.length = *uint; | |
18501 | break; | |
18502 | case DW_LNCT_MD5: | |
18503 | break; | |
18504 | default: | |
18505 | complaint (&symfile_complaints, | |
18506 | _("Unknown format content type %s"), | |
18507 | pulongest (content_type)); | |
18508 | } | |
43988095 JK |
18509 | } |
18510 | ||
ecfb656c | 18511 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
18512 | } |
18513 | ||
18514 | *bufp = buf; | |
18515 | } | |
18516 | ||
debd256d | 18517 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 18518 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 18519 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
18520 | Returns NULL if there is a problem reading the header, e.g., if it |
18521 | has a version we don't understand. | |
debd256d JB |
18522 | |
18523 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
18524 | the returned object point into the dwarf line section buffer, |
18525 | and must not be freed. */ | |
ae2de4f8 | 18526 | |
fff8551c | 18527 | static line_header_up |
9c541725 | 18528 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 18529 | { |
d521ce57 | 18530 | const gdb_byte *line_ptr; |
c764a876 | 18531 | unsigned int bytes_read, offset_size; |
debd256d | 18532 | int i; |
d521ce57 | 18533 | const char *cur_dir, *cur_file; |
3019eac3 DE |
18534 | struct dwarf2_section_info *section; |
18535 | bfd *abfd; | |
18536 | ||
36586728 | 18537 | section = get_debug_line_section (cu); |
3019eac3 DE |
18538 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
18539 | if (section->buffer == NULL) | |
debd256d | 18540 | { |
3019eac3 DE |
18541 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
18542 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
18543 | else | |
18544 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
18545 | return 0; |
18546 | } | |
18547 | ||
fceca515 DE |
18548 | /* We can't do this until we know the section is non-empty. |
18549 | Only then do we know we have such a section. */ | |
a32a8923 | 18550 | abfd = get_section_bfd_owner (section); |
fceca515 | 18551 | |
a738430d MK |
18552 | /* Make sure that at least there's room for the total_length field. |
18553 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 18554 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 18555 | { |
4d3c2250 | 18556 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18557 | return 0; |
18558 | } | |
18559 | ||
fff8551c | 18560 | line_header_up lh (new line_header ()); |
debd256d | 18561 | |
9c541725 | 18562 | lh->sect_off = sect_off; |
527f3840 JK |
18563 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
18564 | ||
9c541725 | 18565 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 18566 | |
a738430d | 18567 | /* Read in the header. */ |
6e70227d | 18568 | lh->total_length = |
c764a876 DE |
18569 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
18570 | &bytes_read, &offset_size); | |
debd256d | 18571 | line_ptr += bytes_read; |
3019eac3 | 18572 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 18573 | { |
4d3c2250 | 18574 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18575 | return 0; |
18576 | } | |
18577 | lh->statement_program_end = line_ptr + lh->total_length; | |
18578 | lh->version = read_2_bytes (abfd, line_ptr); | |
18579 | line_ptr += 2; | |
43988095 | 18580 | if (lh->version > 5) |
cd366ee8 DE |
18581 | { |
18582 | /* This is a version we don't understand. The format could have | |
18583 | changed in ways we don't handle properly so just punt. */ | |
18584 | complaint (&symfile_complaints, | |
18585 | _("unsupported version in .debug_line section")); | |
18586 | return NULL; | |
18587 | } | |
43988095 JK |
18588 | if (lh->version >= 5) |
18589 | { | |
18590 | gdb_byte segment_selector_size; | |
18591 | ||
18592 | /* Skip address size. */ | |
18593 | read_1_byte (abfd, line_ptr); | |
18594 | line_ptr += 1; | |
18595 | ||
18596 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18597 | line_ptr += 1; | |
18598 | if (segment_selector_size != 0) | |
18599 | { | |
18600 | complaint (&symfile_complaints, | |
18601 | _("unsupported segment selector size %u " | |
18602 | "in .debug_line section"), | |
18603 | segment_selector_size); | |
18604 | return NULL; | |
18605 | } | |
18606 | } | |
c764a876 DE |
18607 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18608 | line_ptr += offset_size; | |
debd256d JB |
18609 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18610 | line_ptr += 1; | |
2dc7f7b3 TT |
18611 | if (lh->version >= 4) |
18612 | { | |
18613 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18614 | line_ptr += 1; | |
18615 | } | |
18616 | else | |
18617 | lh->maximum_ops_per_instruction = 1; | |
18618 | ||
18619 | if (lh->maximum_ops_per_instruction == 0) | |
18620 | { | |
18621 | lh->maximum_ops_per_instruction = 1; | |
18622 | complaint (&symfile_complaints, | |
3e43a32a MS |
18623 | _("invalid maximum_ops_per_instruction " |
18624 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18625 | } |
18626 | ||
debd256d JB |
18627 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18628 | line_ptr += 1; | |
18629 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18630 | line_ptr += 1; | |
18631 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18632 | line_ptr += 1; | |
18633 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18634 | line_ptr += 1; | |
fff8551c | 18635 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18636 | |
18637 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18638 | for (i = 1; i < lh->opcode_base; ++i) | |
18639 | { | |
18640 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18641 | line_ptr += 1; | |
18642 | } | |
18643 | ||
43988095 | 18644 | if (lh->version >= 5) |
debd256d | 18645 | { |
43988095 | 18646 | /* Read directory table. */ |
fff8551c PA |
18647 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18648 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18649 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18650 | unsigned int length) |
18651 | { | |
18652 | lh->add_include_dir (name); | |
18653 | }); | |
debd256d | 18654 | |
43988095 | 18655 | /* Read file name table. */ |
fff8551c PA |
18656 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18657 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18658 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18659 | unsigned int length) |
18660 | { | |
ecfb656c | 18661 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18662 | }); |
43988095 JK |
18663 | } |
18664 | else | |
debd256d | 18665 | { |
43988095 JK |
18666 | /* Read directory table. */ |
18667 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18668 | { | |
18669 | line_ptr += bytes_read; | |
fff8551c | 18670 | lh->add_include_dir (cur_dir); |
43988095 | 18671 | } |
debd256d JB |
18672 | line_ptr += bytes_read; |
18673 | ||
43988095 JK |
18674 | /* Read file name table. */ |
18675 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18676 | { | |
ecfb656c PA |
18677 | unsigned int mod_time, length; |
18678 | dir_index d_index; | |
43988095 JK |
18679 | |
18680 | line_ptr += bytes_read; | |
ecfb656c | 18681 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
18682 | line_ptr += bytes_read; |
18683 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18684 | line_ptr += bytes_read; | |
18685 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18686 | line_ptr += bytes_read; | |
18687 | ||
ecfb656c | 18688 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
18689 | } |
18690 | line_ptr += bytes_read; | |
debd256d | 18691 | } |
6e70227d | 18692 | lh->statement_program_start = line_ptr; |
debd256d | 18693 | |
3019eac3 | 18694 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 18695 | complaint (&symfile_complaints, |
3e43a32a MS |
18696 | _("line number info header doesn't " |
18697 | "fit in `.debug_line' section")); | |
debd256d | 18698 | |
debd256d JB |
18699 | return lh; |
18700 | } | |
c906108c | 18701 | |
c6da4cef DE |
18702 | /* Subroutine of dwarf_decode_lines to simplify it. |
18703 | Return the file name of the psymtab for included file FILE_INDEX | |
18704 | in line header LH of PST. | |
18705 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18706 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
18707 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
18708 | ||
18709 | The function creates dangling cleanup registration. */ | |
c6da4cef | 18710 | |
d521ce57 | 18711 | static const char * |
c6da4cef DE |
18712 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
18713 | const struct partial_symtab *pst, | |
18714 | const char *comp_dir) | |
18715 | { | |
8c43009f | 18716 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
18717 | const char *include_name = fe.name; |
18718 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
18719 | const char *pst_filename; |
18720 | char *copied_name = NULL; | |
c6da4cef DE |
18721 | int file_is_pst; |
18722 | ||
8c43009f | 18723 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
18724 | |
18725 | if (!IS_ABSOLUTE_PATH (include_name) | |
18726 | && (dir_name != NULL || comp_dir != NULL)) | |
18727 | { | |
18728 | /* Avoid creating a duplicate psymtab for PST. | |
18729 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
18730 | Before we do the comparison, however, we need to account | |
18731 | for DIR_NAME and COMP_DIR. | |
18732 | First prepend dir_name (if non-NULL). If we still don't | |
18733 | have an absolute path prepend comp_dir (if non-NULL). | |
18734 | However, the directory we record in the include-file's | |
18735 | psymtab does not contain COMP_DIR (to match the | |
18736 | corresponding symtab(s)). | |
18737 | ||
18738 | Example: | |
18739 | ||
18740 | bash$ cd /tmp | |
18741 | bash$ gcc -g ./hello.c | |
18742 | include_name = "hello.c" | |
18743 | dir_name = "." | |
18744 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
18745 | DW_AT_name = "./hello.c" |
18746 | ||
18747 | */ | |
c6da4cef DE |
18748 | |
18749 | if (dir_name != NULL) | |
18750 | { | |
d521ce57 TT |
18751 | char *tem = concat (dir_name, SLASH_STRING, |
18752 | include_name, (char *)NULL); | |
18753 | ||
18754 | make_cleanup (xfree, tem); | |
18755 | include_name = tem; | |
c6da4cef | 18756 | include_name_to_compare = include_name; |
c6da4cef DE |
18757 | } |
18758 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
18759 | { | |
d521ce57 TT |
18760 | char *tem = concat (comp_dir, SLASH_STRING, |
18761 | include_name, (char *)NULL); | |
18762 | ||
18763 | make_cleanup (xfree, tem); | |
18764 | include_name_to_compare = tem; | |
c6da4cef DE |
18765 | } |
18766 | } | |
18767 | ||
18768 | pst_filename = pst->filename; | |
18769 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
18770 | { | |
72b9f47f TT |
18771 | copied_name = concat (pst->dirname, SLASH_STRING, |
18772 | pst_filename, (char *)NULL); | |
18773 | pst_filename = copied_name; | |
c6da4cef DE |
18774 | } |
18775 | ||
1e3fad37 | 18776 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 18777 | |
72b9f47f TT |
18778 | if (copied_name != NULL) |
18779 | xfree (copied_name); | |
c6da4cef DE |
18780 | |
18781 | if (file_is_pst) | |
18782 | return NULL; | |
18783 | return include_name; | |
18784 | } | |
18785 | ||
d9b3de22 DE |
18786 | /* State machine to track the state of the line number program. */ |
18787 | ||
6f77053d | 18788 | class lnp_state_machine |
d9b3de22 | 18789 | { |
6f77053d PA |
18790 | public: |
18791 | /* Initialize a machine state for the start of a line number | |
18792 | program. */ | |
18793 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
18794 | ||
8c43009f PA |
18795 | file_entry *current_file () |
18796 | { | |
18797 | /* lh->file_names is 0-based, but the file name numbers in the | |
18798 | statement program are 1-based. */ | |
6f77053d PA |
18799 | return m_line_header->file_name_at (m_file); |
18800 | } | |
18801 | ||
18802 | /* Record the line in the state machine. END_SEQUENCE is true if | |
18803 | we're processing the end of a sequence. */ | |
18804 | void record_line (bool end_sequence); | |
18805 | ||
18806 | /* Check address and if invalid nop-out the rest of the lines in this | |
18807 | sequence. */ | |
18808 | void check_line_address (struct dwarf2_cu *cu, | |
18809 | const gdb_byte *line_ptr, | |
18810 | CORE_ADDR lowpc, CORE_ADDR address); | |
18811 | ||
18812 | void handle_set_discriminator (unsigned int discriminator) | |
18813 | { | |
18814 | m_discriminator = discriminator; | |
18815 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
18816 | } | |
18817 | ||
18818 | /* Handle DW_LNE_set_address. */ | |
18819 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
18820 | { | |
18821 | m_op_index = 0; | |
18822 | address += baseaddr; | |
18823 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
18824 | } | |
18825 | ||
18826 | /* Handle DW_LNS_advance_pc. */ | |
18827 | void handle_advance_pc (CORE_ADDR adjust); | |
18828 | ||
18829 | /* Handle a special opcode. */ | |
18830 | void handle_special_opcode (unsigned char op_code); | |
18831 | ||
18832 | /* Handle DW_LNS_advance_line. */ | |
18833 | void handle_advance_line (int line_delta) | |
18834 | { | |
18835 | advance_line (line_delta); | |
18836 | } | |
18837 | ||
18838 | /* Handle DW_LNS_set_file. */ | |
18839 | void handle_set_file (file_name_index file); | |
18840 | ||
18841 | /* Handle DW_LNS_negate_stmt. */ | |
18842 | void handle_negate_stmt () | |
18843 | { | |
18844 | m_is_stmt = !m_is_stmt; | |
18845 | } | |
18846 | ||
18847 | /* Handle DW_LNS_const_add_pc. */ | |
18848 | void handle_const_add_pc (); | |
18849 | ||
18850 | /* Handle DW_LNS_fixed_advance_pc. */ | |
18851 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
18852 | { | |
18853 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18854 | m_op_index = 0; | |
18855 | } | |
18856 | ||
18857 | /* Handle DW_LNS_copy. */ | |
18858 | void handle_copy () | |
18859 | { | |
18860 | record_line (false); | |
18861 | m_discriminator = 0; | |
18862 | } | |
18863 | ||
18864 | /* Handle DW_LNE_end_sequence. */ | |
18865 | void handle_end_sequence () | |
18866 | { | |
18867 | m_record_line_callback = ::record_line; | |
18868 | } | |
18869 | ||
18870 | private: | |
18871 | /* Advance the line by LINE_DELTA. */ | |
18872 | void advance_line (int line_delta) | |
18873 | { | |
18874 | m_line += line_delta; | |
18875 | ||
18876 | if (line_delta != 0) | |
18877 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
18878 | } |
18879 | ||
6f77053d PA |
18880 | gdbarch *m_gdbarch; |
18881 | ||
18882 | /* True if we're recording lines. | |
18883 | Otherwise we're building partial symtabs and are just interested in | |
18884 | finding include files mentioned by the line number program. */ | |
18885 | bool m_record_lines_p; | |
18886 | ||
8c43009f | 18887 | /* The line number header. */ |
6f77053d | 18888 | line_header *m_line_header; |
8c43009f | 18889 | |
6f77053d PA |
18890 | /* These are part of the standard DWARF line number state machine, |
18891 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 18892 | |
6f77053d | 18893 | unsigned char m_op_index = 0; |
8c43009f | 18894 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
18895 | file_name_index m_file = (file_name_index) 1; |
18896 | unsigned int m_line = 1; | |
18897 | ||
18898 | /* These are initialized in the constructor. */ | |
18899 | ||
18900 | CORE_ADDR m_address; | |
18901 | bool m_is_stmt; | |
18902 | unsigned int m_discriminator; | |
d9b3de22 DE |
18903 | |
18904 | /* Additional bits of state we need to track. */ | |
18905 | ||
18906 | /* The last file that we called dwarf2_start_subfile for. | |
18907 | This is only used for TLLs. */ | |
6f77053d | 18908 | unsigned int m_last_file = 0; |
d9b3de22 | 18909 | /* The last file a line number was recorded for. */ |
6f77053d | 18910 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
18911 | |
18912 | /* The function to call to record a line. */ | |
6f77053d | 18913 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
18914 | |
18915 | /* The last line number that was recorded, used to coalesce | |
18916 | consecutive entries for the same line. This can happen, for | |
18917 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
18918 | unsigned int m_last_line = 0; |
18919 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 18920 | }; |
d9b3de22 | 18921 | |
6f77053d PA |
18922 | void |
18923 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
18924 | { | |
18925 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
18926 | / m_line_header->maximum_ops_per_instruction) | |
18927 | * m_line_header->minimum_instruction_length); | |
18928 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18929 | m_op_index = ((m_op_index + adjust) | |
18930 | % m_line_header->maximum_ops_per_instruction); | |
18931 | } | |
d9b3de22 | 18932 | |
6f77053d PA |
18933 | void |
18934 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 18935 | { |
6f77053d PA |
18936 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
18937 | CORE_ADDR addr_adj = (((m_op_index | |
18938 | + (adj_opcode / m_line_header->line_range)) | |
18939 | / m_line_header->maximum_ops_per_instruction) | |
18940 | * m_line_header->minimum_instruction_length); | |
18941 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18942 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
18943 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 18944 | |
6f77053d PA |
18945 | int line_delta = (m_line_header->line_base |
18946 | + (adj_opcode % m_line_header->line_range)); | |
18947 | advance_line (line_delta); | |
18948 | record_line (false); | |
18949 | m_discriminator = 0; | |
18950 | } | |
d9b3de22 | 18951 | |
6f77053d PA |
18952 | void |
18953 | lnp_state_machine::handle_set_file (file_name_index file) | |
18954 | { | |
18955 | m_file = file; | |
18956 | ||
18957 | const file_entry *fe = current_file (); | |
18958 | if (fe == NULL) | |
18959 | dwarf2_debug_line_missing_file_complaint (); | |
18960 | else if (m_record_lines_p) | |
18961 | { | |
18962 | const char *dir = fe->include_dir (m_line_header); | |
18963 | ||
18964 | m_last_subfile = current_subfile; | |
18965 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
18966 | dwarf2_start_subfile (fe->name, dir); | |
18967 | } | |
18968 | } | |
18969 | ||
18970 | void | |
18971 | lnp_state_machine::handle_const_add_pc () | |
18972 | { | |
18973 | CORE_ADDR adjust | |
18974 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
18975 | ||
18976 | CORE_ADDR addr_adj | |
18977 | = (((m_op_index + adjust) | |
18978 | / m_line_header->maximum_ops_per_instruction) | |
18979 | * m_line_header->minimum_instruction_length); | |
18980 | ||
18981 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18982 | m_op_index = ((m_op_index + adjust) | |
18983 | % m_line_header->maximum_ops_per_instruction); | |
18984 | } | |
d9b3de22 | 18985 | |
c91513d8 PP |
18986 | /* Ignore this record_line request. */ |
18987 | ||
18988 | static void | |
18989 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
18990 | { | |
18991 | return; | |
18992 | } | |
18993 | ||
a05a36a5 DE |
18994 | /* Return non-zero if we should add LINE to the line number table. |
18995 | LINE is the line to add, LAST_LINE is the last line that was added, | |
18996 | LAST_SUBFILE is the subfile for LAST_LINE. | |
18997 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
18998 | had a non-zero discriminator. | |
18999 | ||
19000 | We have to be careful in the presence of discriminators. | |
19001 | E.g., for this line: | |
19002 | ||
19003 | for (i = 0; i < 100000; i++); | |
19004 | ||
19005 | clang can emit four line number entries for that one line, | |
19006 | each with a different discriminator. | |
19007 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19008 | ||
19009 | However, we want gdb to coalesce all four entries into one. | |
19010 | Otherwise the user could stepi into the middle of the line and | |
19011 | gdb would get confused about whether the pc really was in the | |
19012 | middle of the line. | |
19013 | ||
19014 | Things are further complicated by the fact that two consecutive | |
19015 | line number entries for the same line is a heuristic used by gcc | |
19016 | to denote the end of the prologue. So we can't just discard duplicate | |
19017 | entries, we have to be selective about it. The heuristic we use is | |
19018 | that we only collapse consecutive entries for the same line if at least | |
19019 | one of those entries has a non-zero discriminator. PR 17276. | |
19020 | ||
19021 | Note: Addresses in the line number state machine can never go backwards | |
19022 | within one sequence, thus this coalescing is ok. */ | |
19023 | ||
19024 | static int | |
19025 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
19026 | int line_has_non_zero_discriminator, | |
19027 | struct subfile *last_subfile) | |
19028 | { | |
19029 | if (current_subfile != last_subfile) | |
19030 | return 1; | |
19031 | if (line != last_line) | |
19032 | return 1; | |
19033 | /* Same line for the same file that we've seen already. | |
19034 | As a last check, for pr 17276, only record the line if the line | |
19035 | has never had a non-zero discriminator. */ | |
19036 | if (!line_has_non_zero_discriminator) | |
19037 | return 1; | |
19038 | return 0; | |
19039 | } | |
19040 | ||
252a6764 DE |
19041 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
19042 | in the line table of subfile SUBFILE. */ | |
19043 | ||
19044 | static void | |
d9b3de22 DE |
19045 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
19046 | unsigned int line, CORE_ADDR address, | |
19047 | record_line_ftype p_record_line) | |
252a6764 DE |
19048 | { |
19049 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19050 | ||
27e0867f DE |
19051 | if (dwarf_line_debug) |
19052 | { | |
19053 | fprintf_unfiltered (gdb_stdlog, | |
19054 | "Recording line %u, file %s, address %s\n", | |
19055 | line, lbasename (subfile->name), | |
19056 | paddress (gdbarch, address)); | |
19057 | } | |
19058 | ||
d5962de5 | 19059 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
19060 | } |
19061 | ||
19062 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19063 | Mark the end of a set of line number records. | |
d9b3de22 | 19064 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19065 | If SUBFILE is NULL the request is ignored. */ |
19066 | ||
19067 | static void | |
19068 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
19069 | CORE_ADDR address, record_line_ftype p_record_line) | |
19070 | { | |
27e0867f DE |
19071 | if (subfile == NULL) |
19072 | return; | |
19073 | ||
19074 | if (dwarf_line_debug) | |
19075 | { | |
19076 | fprintf_unfiltered (gdb_stdlog, | |
19077 | "Finishing current line, file %s, address %s\n", | |
19078 | lbasename (subfile->name), | |
19079 | paddress (gdbarch, address)); | |
19080 | } | |
19081 | ||
d9b3de22 DE |
19082 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
19083 | } | |
19084 | ||
6f77053d PA |
19085 | void |
19086 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19087 | { |
d9b3de22 DE |
19088 | if (dwarf_line_debug) |
19089 | { | |
19090 | fprintf_unfiltered (gdb_stdlog, | |
19091 | "Processing actual line %u: file %u," | |
19092 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
19093 | m_line, to_underlying (m_file), |
19094 | paddress (m_gdbarch, m_address), | |
19095 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
19096 | } |
19097 | ||
6f77053d | 19098 | file_entry *fe = current_file (); |
8c43009f PA |
19099 | |
19100 | if (fe == NULL) | |
d9b3de22 DE |
19101 | dwarf2_debug_line_missing_file_complaint (); |
19102 | /* For now we ignore lines not starting on an instruction boundary. | |
19103 | But not when processing end_sequence for compatibility with the | |
19104 | previous version of the code. */ | |
6f77053d | 19105 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 19106 | { |
8c43009f | 19107 | fe->included_p = 1; |
6f77053d | 19108 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 19109 | { |
6f77053d | 19110 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 19111 | { |
6f77053d PA |
19112 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
19113 | m_address, m_record_line_callback); | |
d9b3de22 DE |
19114 | } |
19115 | ||
19116 | if (!end_sequence) | |
19117 | { | |
6f77053d PA |
19118 | if (dwarf_record_line_p (m_line, m_last_line, |
19119 | m_line_has_non_zero_discriminator, | |
19120 | m_last_subfile)) | |
d9b3de22 | 19121 | { |
6f77053d PA |
19122 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
19123 | m_line, m_address, | |
19124 | m_record_line_callback); | |
d9b3de22 | 19125 | } |
6f77053d PA |
19126 | m_last_subfile = current_subfile; |
19127 | m_last_line = m_line; | |
d9b3de22 DE |
19128 | } |
19129 | } | |
19130 | } | |
19131 | } | |
19132 | ||
6f77053d PA |
19133 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
19134 | bool record_lines_p) | |
d9b3de22 | 19135 | { |
6f77053d PA |
19136 | m_gdbarch = arch; |
19137 | m_record_lines_p = record_lines_p; | |
19138 | m_line_header = lh; | |
d9b3de22 | 19139 | |
6f77053d | 19140 | m_record_line_callback = ::record_line; |
d9b3de22 | 19141 | |
d9b3de22 DE |
19142 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
19143 | was a line entry for it so that the backend has a chance to adjust it | |
19144 | and also record it in case it needs it. This is currently used by MIPS | |
19145 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
19146 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
19147 | m_is_stmt = lh->default_is_stmt; | |
19148 | m_discriminator = 0; | |
252a6764 DE |
19149 | } |
19150 | ||
6f77053d PA |
19151 | void |
19152 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
19153 | const gdb_byte *line_ptr, | |
19154 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
19155 | { |
19156 | /* If address < lowpc then it's not a usable value, it's outside the | |
19157 | pc range of the CU. However, we restrict the test to only address | |
19158 | values of zero to preserve GDB's previous behaviour which is to | |
19159 | handle the specific case of a function being GC'd by the linker. */ | |
19160 | ||
19161 | if (address == 0 && address < lowpc) | |
19162 | { | |
19163 | /* This line table is for a function which has been | |
19164 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
19165 | ||
19166 | struct objfile *objfile = cu->objfile; | |
19167 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
19168 | ||
19169 | complaint (&symfile_complaints, | |
19170 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
19171 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
19172 | m_record_line_callback = noop_record_line; |
19173 | /* Note: record_line_callback is left as noop_record_line until | |
19174 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
19175 | } |
19176 | } | |
19177 | ||
f3f5162e | 19178 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
19179 | Process the line number information in LH. |
19180 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
19181 | program in order to set included_p for every referenced header. */ | |
debd256d | 19182 | |
c906108c | 19183 | static void |
43f3e411 DE |
19184 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
19185 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 19186 | { |
d521ce57 TT |
19187 | const gdb_byte *line_ptr, *extended_end; |
19188 | const gdb_byte *line_end; | |
a8c50c1f | 19189 | unsigned int bytes_read, extended_len; |
699ca60a | 19190 | unsigned char op_code, extended_op; |
e142c38c DJ |
19191 | CORE_ADDR baseaddr; |
19192 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 19193 | bfd *abfd = objfile->obfd; |
fbf65064 | 19194 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
19195 | /* True if we're recording line info (as opposed to building partial |
19196 | symtabs and just interested in finding include files mentioned by | |
19197 | the line number program). */ | |
19198 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
19199 | |
19200 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19201 | |
debd256d JB |
19202 | line_ptr = lh->statement_program_start; |
19203 | line_end = lh->statement_program_end; | |
c906108c SS |
19204 | |
19205 | /* Read the statement sequences until there's nothing left. */ | |
19206 | while (line_ptr < line_end) | |
19207 | { | |
6f77053d PA |
19208 | /* The DWARF line number program state machine. Reset the state |
19209 | machine at the start of each sequence. */ | |
19210 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
19211 | bool end_sequence = false; | |
d9b3de22 | 19212 | |
8c43009f | 19213 | if (record_lines_p) |
c906108c | 19214 | { |
8c43009f PA |
19215 | /* Start a subfile for the current file of the state |
19216 | machine. */ | |
19217 | const file_entry *fe = state_machine.current_file (); | |
19218 | ||
19219 | if (fe != NULL) | |
19220 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
19221 | } |
19222 | ||
a738430d | 19223 | /* Decode the table. */ |
d9b3de22 | 19224 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
19225 | { |
19226 | op_code = read_1_byte (abfd, line_ptr); | |
19227 | line_ptr += 1; | |
9aa1fe7e | 19228 | |
debd256d | 19229 | if (op_code >= lh->opcode_base) |
6e70227d | 19230 | { |
8e07a239 | 19231 | /* Special opcode. */ |
6f77053d | 19232 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
19233 | } |
19234 | else switch (op_code) | |
c906108c SS |
19235 | { |
19236 | case DW_LNS_extended_op: | |
3e43a32a MS |
19237 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
19238 | &bytes_read); | |
473b7be6 | 19239 | line_ptr += bytes_read; |
a8c50c1f | 19240 | extended_end = line_ptr + extended_len; |
c906108c SS |
19241 | extended_op = read_1_byte (abfd, line_ptr); |
19242 | line_ptr += 1; | |
19243 | switch (extended_op) | |
19244 | { | |
19245 | case DW_LNE_end_sequence: | |
6f77053d PA |
19246 | state_machine.handle_end_sequence (); |
19247 | end_sequence = true; | |
c906108c SS |
19248 | break; |
19249 | case DW_LNE_set_address: | |
d9b3de22 DE |
19250 | { |
19251 | CORE_ADDR address | |
19252 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 19253 | line_ptr += bytes_read; |
6f77053d PA |
19254 | |
19255 | state_machine.check_line_address (cu, line_ptr, | |
19256 | lowpc, address); | |
19257 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 19258 | } |
c906108c SS |
19259 | break; |
19260 | case DW_LNE_define_file: | |
debd256d | 19261 | { |
d521ce57 | 19262 | const char *cur_file; |
ecfb656c PA |
19263 | unsigned int mod_time, length; |
19264 | dir_index dindex; | |
6e70227d | 19265 | |
3e43a32a MS |
19266 | cur_file = read_direct_string (abfd, line_ptr, |
19267 | &bytes_read); | |
debd256d | 19268 | line_ptr += bytes_read; |
ecfb656c | 19269 | dindex = (dir_index) |
debd256d JB |
19270 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
19271 | line_ptr += bytes_read; | |
19272 | mod_time = | |
19273 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19274 | line_ptr += bytes_read; | |
19275 | length = | |
19276 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19277 | line_ptr += bytes_read; | |
ecfb656c | 19278 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 19279 | } |
c906108c | 19280 | break; |
d0c6ba3d | 19281 | case DW_LNE_set_discriminator: |
6f77053d PA |
19282 | { |
19283 | /* The discriminator is not interesting to the | |
19284 | debugger; just ignore it. We still need to | |
19285 | check its value though: | |
19286 | if there are consecutive entries for the same | |
19287 | (non-prologue) line we want to coalesce them. | |
19288 | PR 17276. */ | |
19289 | unsigned int discr | |
19290 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19291 | line_ptr += bytes_read; | |
19292 | ||
19293 | state_machine.handle_set_discriminator (discr); | |
19294 | } | |
d0c6ba3d | 19295 | break; |
c906108c | 19296 | default: |
4d3c2250 | 19297 | complaint (&symfile_complaints, |
e2e0b3e5 | 19298 | _("mangled .debug_line section")); |
debd256d | 19299 | return; |
c906108c | 19300 | } |
a8c50c1f DJ |
19301 | /* Make sure that we parsed the extended op correctly. If e.g. |
19302 | we expected a different address size than the producer used, | |
19303 | we may have read the wrong number of bytes. */ | |
19304 | if (line_ptr != extended_end) | |
19305 | { | |
19306 | complaint (&symfile_complaints, | |
19307 | _("mangled .debug_line section")); | |
19308 | return; | |
19309 | } | |
c906108c SS |
19310 | break; |
19311 | case DW_LNS_copy: | |
6f77053d | 19312 | state_machine.handle_copy (); |
c906108c SS |
19313 | break; |
19314 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
19315 | { |
19316 | CORE_ADDR adjust | |
19317 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 19318 | line_ptr += bytes_read; |
6f77053d PA |
19319 | |
19320 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 19321 | } |
c906108c SS |
19322 | break; |
19323 | case DW_LNS_advance_line: | |
a05a36a5 DE |
19324 | { |
19325 | int line_delta | |
19326 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 19327 | line_ptr += bytes_read; |
6f77053d PA |
19328 | |
19329 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 19330 | } |
c906108c SS |
19331 | break; |
19332 | case DW_LNS_set_file: | |
d9b3de22 | 19333 | { |
6f77053d | 19334 | file_name_index file |
ecfb656c PA |
19335 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
19336 | &bytes_read); | |
d9b3de22 | 19337 | line_ptr += bytes_read; |
8c43009f | 19338 | |
6f77053d | 19339 | state_machine.handle_set_file (file); |
d9b3de22 | 19340 | } |
c906108c SS |
19341 | break; |
19342 | case DW_LNS_set_column: | |
0ad93d4f | 19343 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
19344 | line_ptr += bytes_read; |
19345 | break; | |
19346 | case DW_LNS_negate_stmt: | |
6f77053d | 19347 | state_machine.handle_negate_stmt (); |
c906108c SS |
19348 | break; |
19349 | case DW_LNS_set_basic_block: | |
c906108c | 19350 | break; |
c2c6d25f JM |
19351 | /* Add to the address register of the state machine the |
19352 | address increment value corresponding to special opcode | |
a738430d MK |
19353 | 255. I.e., this value is scaled by the minimum |
19354 | instruction length since special opcode 255 would have | |
b021a221 | 19355 | scaled the increment. */ |
c906108c | 19356 | case DW_LNS_const_add_pc: |
6f77053d | 19357 | state_machine.handle_const_add_pc (); |
c906108c SS |
19358 | break; |
19359 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 19360 | { |
6f77053d | 19361 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 19362 | line_ptr += 2; |
6f77053d PA |
19363 | |
19364 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 19365 | } |
c906108c | 19366 | break; |
9aa1fe7e | 19367 | default: |
a738430d MK |
19368 | { |
19369 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 19370 | int i; |
a738430d | 19371 | |
debd256d | 19372 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
19373 | { |
19374 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19375 | line_ptr += bytes_read; | |
19376 | } | |
19377 | } | |
c906108c SS |
19378 | } |
19379 | } | |
d9b3de22 DE |
19380 | |
19381 | if (!end_sequence) | |
19382 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
19383 | ||
19384 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
19385 | in which case we still finish recording the last line). */ | |
6f77053d | 19386 | state_machine.record_line (true); |
c906108c | 19387 | } |
f3f5162e DE |
19388 | } |
19389 | ||
19390 | /* Decode the Line Number Program (LNP) for the given line_header | |
19391 | structure and CU. The actual information extracted and the type | |
19392 | of structures created from the LNP depends on the value of PST. | |
19393 | ||
19394 | 1. If PST is NULL, then this procedure uses the data from the program | |
19395 | to create all necessary symbol tables, and their linetables. | |
19396 | ||
19397 | 2. If PST is not NULL, this procedure reads the program to determine | |
19398 | the list of files included by the unit represented by PST, and | |
19399 | builds all the associated partial symbol tables. | |
19400 | ||
19401 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
19402 | It is used for relative paths in the line table. | |
19403 | NOTE: When processing partial symtabs (pst != NULL), | |
19404 | comp_dir == pst->dirname. | |
19405 | ||
19406 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
19407 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
19408 | symtab we don't use it in the name of the psymtabs we create. | |
19409 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
19410 | A good testcase for this is mb-inline.exp. |
19411 | ||
527f3840 JK |
19412 | LOWPC is the lowest address in CU (or 0 if not known). |
19413 | ||
19414 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
19415 | for its PC<->lines mapping information. Otherwise only the filename | |
19416 | table is read in. */ | |
f3f5162e DE |
19417 | |
19418 | static void | |
19419 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 19420 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 19421 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
19422 | { |
19423 | struct objfile *objfile = cu->objfile; | |
19424 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 19425 | |
527f3840 JK |
19426 | if (decode_mapping) |
19427 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
19428 | |
19429 | if (decode_for_pst_p) | |
19430 | { | |
19431 | int file_index; | |
19432 | ||
19433 | /* Now that we're done scanning the Line Header Program, we can | |
19434 | create the psymtab of each included file. */ | |
fff8551c | 19435 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
19436 | if (lh->file_names[file_index].included_p == 1) |
19437 | { | |
d521ce57 | 19438 | const char *include_name = |
c6da4cef DE |
19439 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
19440 | if (include_name != NULL) | |
aaa75496 JB |
19441 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
19442 | } | |
19443 | } | |
cb1df416 DJ |
19444 | else |
19445 | { | |
19446 | /* Make sure a symtab is created for every file, even files | |
19447 | which contain only variables (i.e. no code with associated | |
19448 | line numbers). */ | |
43f3e411 | 19449 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 19450 | int i; |
cb1df416 | 19451 | |
fff8551c | 19452 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 19453 | { |
8c43009f | 19454 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 19455 | |
8c43009f | 19456 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 19457 | |
cb1df416 | 19458 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
19459 | { |
19460 | current_subfile->symtab | |
19461 | = allocate_symtab (cust, current_subfile->name); | |
19462 | } | |
8c43009f | 19463 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
19464 | } |
19465 | } | |
c906108c SS |
19466 | } |
19467 | ||
19468 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
19469 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 19470 | or NULL if not known. |
c906108c SS |
19471 | This routine tries to keep line numbers from identical absolute and |
19472 | relative file names in a common subfile. | |
19473 | ||
19474 | Using the `list' example from the GDB testsuite, which resides in | |
19475 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
19476 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
19477 | ||
c5aa993b | 19478 | DW_AT_name: /srcdir/list0.c |
4d663531 | 19479 | DW_AT_comp_dir: /compdir |
357e46e7 | 19480 | files.files[0].name: list0.h |
c5aa993b | 19481 | files.files[0].dir: /srcdir |
357e46e7 | 19482 | files.files[1].name: list0.c |
c5aa993b | 19483 | files.files[1].dir: /srcdir |
c906108c SS |
19484 | |
19485 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
19486 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
19487 | start_subfile will ensure that this happens provided that we pass the | |
19488 | concatenation of files.files[1].dir and files.files[1].name as the | |
19489 | subfile's name. */ | |
c906108c SS |
19490 | |
19491 | static void | |
4d663531 | 19492 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 19493 | { |
d521ce57 | 19494 | char *copy = NULL; |
4f1520fb | 19495 | |
4d663531 | 19496 | /* In order not to lose the line information directory, |
4f1520fb FR |
19497 | we concatenate it to the filename when it makes sense. |
19498 | Note that the Dwarf3 standard says (speaking of filenames in line | |
19499 | information): ``The directory index is ignored for file names | |
19500 | that represent full path names''. Thus ignoring dirname in the | |
19501 | `else' branch below isn't an issue. */ | |
c906108c | 19502 | |
d5166ae1 | 19503 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
19504 | { |
19505 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
19506 | filename = copy; | |
19507 | } | |
c906108c | 19508 | |
4d663531 | 19509 | start_subfile (filename); |
4f1520fb | 19510 | |
d521ce57 TT |
19511 | if (copy != NULL) |
19512 | xfree (copy); | |
c906108c SS |
19513 | } |
19514 | ||
f4dc4d17 DE |
19515 | /* Start a symtab for DWARF. |
19516 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
19517 | ||
43f3e411 | 19518 | static struct compunit_symtab * |
f4dc4d17 | 19519 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 19520 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 19521 | { |
43f3e411 | 19522 | struct compunit_symtab *cust |
5ffa0793 | 19523 | = start_symtab (cu->objfile, name, comp_dir, low_pc, cu->language); |
43f3e411 | 19524 | |
f4dc4d17 DE |
19525 | record_debugformat ("DWARF 2"); |
19526 | record_producer (cu->producer); | |
19527 | ||
19528 | /* We assume that we're processing GCC output. */ | |
19529 | processing_gcc_compilation = 2; | |
19530 | ||
4d4ec4e5 | 19531 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
19532 | |
19533 | return cust; | |
f4dc4d17 DE |
19534 | } |
19535 | ||
4c2df51b DJ |
19536 | static void |
19537 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 19538 | struct dwarf2_cu *cu) |
4c2df51b | 19539 | { |
e7c27a73 DJ |
19540 | struct objfile *objfile = cu->objfile; |
19541 | struct comp_unit_head *cu_header = &cu->header; | |
19542 | ||
4c2df51b DJ |
19543 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
19544 | code here to turn a symbol with DW_AT_external and a | |
19545 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
19546 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
19547 | with some versions of binutils) where shared libraries could have | |
19548 | relocations against symbols in their debug information - the | |
19549 | minimal symbol would have the right address, but the debug info | |
19550 | would not. It's no longer necessary, because we will explicitly | |
19551 | apply relocations when we read in the debug information now. */ | |
19552 | ||
19553 | /* A DW_AT_location attribute with no contents indicates that a | |
19554 | variable has been optimized away. */ | |
19555 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
19556 | { | |
f1e6e072 | 19557 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
19558 | return; |
19559 | } | |
19560 | ||
19561 | /* Handle one degenerate form of location expression specially, to | |
19562 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
19563 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
19564 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
19565 | |
19566 | if (attr_form_is_block (attr) | |
3019eac3 DE |
19567 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
19568 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
19569 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
19570 | && (DW_BLOCK (attr)->size | |
19571 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 19572 | { |
891d2f0b | 19573 | unsigned int dummy; |
4c2df51b | 19574 | |
3019eac3 DE |
19575 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
19576 | SYMBOL_VALUE_ADDRESS (sym) = | |
19577 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
19578 | else | |
19579 | SYMBOL_VALUE_ADDRESS (sym) = | |
19580 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 19581 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
19582 | fixup_symbol_section (sym, objfile); |
19583 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
19584 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
19585 | return; |
19586 | } | |
19587 | ||
19588 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
19589 | expression evaluator, and use LOC_COMPUTED only when necessary | |
19590 | (i.e. when the value of a register or memory location is | |
19591 | referenced, or a thread-local block, etc.). Then again, it might | |
19592 | not be worthwhile. I'm assuming that it isn't unless performance | |
19593 | or memory numbers show me otherwise. */ | |
19594 | ||
f1e6e072 | 19595 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19596 | |
f1e6e072 | 19597 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19598 | cu->has_loclist = 1; |
4c2df51b DJ |
19599 | } |
19600 | ||
c906108c SS |
19601 | /* Given a pointer to a DWARF information entry, figure out if we need |
19602 | to make a symbol table entry for it, and if so, create a new entry | |
19603 | and return a pointer to it. | |
19604 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19605 | used the passed type. |
19606 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19607 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19608 | |
19609 | static struct symbol * | |
34eaf542 TT |
19610 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19611 | struct symbol *space) | |
c906108c | 19612 | { |
e7c27a73 | 19613 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19614 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19615 | struct symbol *sym = NULL; |
15d034d0 | 19616 | const char *name; |
c906108c SS |
19617 | struct attribute *attr = NULL; |
19618 | struct attribute *attr2 = NULL; | |
e142c38c | 19619 | CORE_ADDR baseaddr; |
e37fd15a SW |
19620 | struct pending **list_to_add = NULL; |
19621 | ||
edb3359d | 19622 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19623 | |
19624 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19625 | |
94af9270 | 19626 | name = dwarf2_name (die, cu); |
c906108c SS |
19627 | if (name) |
19628 | { | |
94af9270 | 19629 | const char *linkagename; |
34eaf542 | 19630 | int suppress_add = 0; |
94af9270 | 19631 | |
34eaf542 TT |
19632 | if (space) |
19633 | sym = space; | |
19634 | else | |
e623cf5d | 19635 | sym = allocate_symbol (objfile); |
c906108c | 19636 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19637 | |
19638 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19639 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19640 | linkagename = dwarf2_physname (name, die, cu); |
19641 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19642 | |
f55ee35c JK |
19643 | /* Fortran does not have mangling standard and the mangling does differ |
19644 | between gfortran, iFort etc. */ | |
19645 | if (cu->language == language_fortran | |
b250c185 | 19646 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19647 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19648 | dwarf2_full_name (name, die, cu), |
29df156d | 19649 | NULL); |
f55ee35c | 19650 | |
c906108c | 19651 | /* Default assumptions. |
c5aa993b | 19652 | Use the passed type or decode it from the die. */ |
176620f1 | 19653 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19654 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19655 | if (type != NULL) |
19656 | SYMBOL_TYPE (sym) = type; | |
19657 | else | |
e7c27a73 | 19658 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19659 | attr = dwarf2_attr (die, |
19660 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19661 | cu); | |
c906108c SS |
19662 | if (attr) |
19663 | { | |
19664 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19665 | } | |
cb1df416 | 19666 | |
edb3359d DJ |
19667 | attr = dwarf2_attr (die, |
19668 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19669 | cu); | |
cb1df416 DJ |
19670 | if (attr) |
19671 | { | |
ecfb656c | 19672 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 19673 | struct file_entry *fe; |
9a619af0 | 19674 | |
ecfb656c PA |
19675 | if (cu->line_header != NULL) |
19676 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
19677 | else |
19678 | fe = NULL; | |
19679 | ||
19680 | if (fe == NULL) | |
cb1df416 DJ |
19681 | complaint (&symfile_complaints, |
19682 | _("file index out of range")); | |
8c43009f PA |
19683 | else |
19684 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
19685 | } |
19686 | ||
c906108c SS |
19687 | switch (die->tag) |
19688 | { | |
19689 | case DW_TAG_label: | |
e142c38c | 19690 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 19691 | if (attr) |
3e29f34a MR |
19692 | { |
19693 | CORE_ADDR addr; | |
19694 | ||
19695 | addr = attr_value_as_address (attr); | |
19696 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
19697 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
19698 | } | |
0f5238ed TT |
19699 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
19700 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 19701 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 19702 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
19703 | break; |
19704 | case DW_TAG_subprogram: | |
19705 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19706 | finish_block. */ | |
f1e6e072 | 19707 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 19708 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
19709 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
19710 | || cu->language == language_ada) | |
c906108c | 19711 | { |
2cfa0c8d JB |
19712 | /* Subprograms marked external are stored as a global symbol. |
19713 | Ada subprograms, whether marked external or not, are always | |
19714 | stored as a global symbol, because we want to be able to | |
19715 | access them globally. For instance, we want to be able | |
19716 | to break on a nested subprogram without having to | |
19717 | specify the context. */ | |
e37fd15a | 19718 | list_to_add = &global_symbols; |
c906108c SS |
19719 | } |
19720 | else | |
19721 | { | |
e37fd15a | 19722 | list_to_add = cu->list_in_scope; |
c906108c SS |
19723 | } |
19724 | break; | |
edb3359d DJ |
19725 | case DW_TAG_inlined_subroutine: |
19726 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19727 | finish_block. */ | |
f1e6e072 | 19728 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 19729 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 19730 | list_to_add = cu->list_in_scope; |
edb3359d | 19731 | break; |
34eaf542 TT |
19732 | case DW_TAG_template_value_param: |
19733 | suppress_add = 1; | |
19734 | /* Fall through. */ | |
72929c62 | 19735 | case DW_TAG_constant: |
c906108c | 19736 | case DW_TAG_variable: |
254e6b9e | 19737 | case DW_TAG_member: |
0963b4bd MS |
19738 | /* Compilation with minimal debug info may result in |
19739 | variables with missing type entries. Change the | |
19740 | misleading `void' type to something sensible. */ | |
c906108c | 19741 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 19742 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 19743 | |
e142c38c | 19744 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
19745 | /* In the case of DW_TAG_member, we should only be called for |
19746 | static const members. */ | |
19747 | if (die->tag == DW_TAG_member) | |
19748 | { | |
3863f96c DE |
19749 | /* dwarf2_add_field uses die_is_declaration, |
19750 | so we do the same. */ | |
254e6b9e DE |
19751 | gdb_assert (die_is_declaration (die, cu)); |
19752 | gdb_assert (attr); | |
19753 | } | |
c906108c SS |
19754 | if (attr) |
19755 | { | |
e7c27a73 | 19756 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 19757 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 19758 | if (!suppress_add) |
34eaf542 TT |
19759 | { |
19760 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 19761 | list_to_add = &global_symbols; |
34eaf542 | 19762 | else |
e37fd15a | 19763 | list_to_add = cu->list_in_scope; |
34eaf542 | 19764 | } |
c906108c SS |
19765 | break; |
19766 | } | |
e142c38c | 19767 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19768 | if (attr) |
19769 | { | |
e7c27a73 | 19770 | var_decode_location (attr, sym, cu); |
e142c38c | 19771 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
19772 | |
19773 | /* Fortran explicitly imports any global symbols to the local | |
19774 | scope by DW_TAG_common_block. */ | |
19775 | if (cu->language == language_fortran && die->parent | |
19776 | && die->parent->tag == DW_TAG_common_block) | |
19777 | attr2 = NULL; | |
19778 | ||
caac4577 JG |
19779 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
19780 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
19781 | && !dwarf2_per_objfile->has_section_at_zero) | |
19782 | { | |
19783 | /* When a static variable is eliminated by the linker, | |
19784 | the corresponding debug information is not stripped | |
19785 | out, but the variable address is set to null; | |
19786 | do not add such variables into symbol table. */ | |
19787 | } | |
19788 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 19789 | { |
f55ee35c JK |
19790 | /* Workaround gfortran PR debug/40040 - it uses |
19791 | DW_AT_location for variables in -fPIC libraries which may | |
19792 | get overriden by other libraries/executable and get | |
19793 | a different address. Resolve it by the minimal symbol | |
19794 | which may come from inferior's executable using copy | |
19795 | relocation. Make this workaround only for gfortran as for | |
19796 | other compilers GDB cannot guess the minimal symbol | |
19797 | Fortran mangling kind. */ | |
19798 | if (cu->language == language_fortran && die->parent | |
19799 | && die->parent->tag == DW_TAG_module | |
19800 | && cu->producer | |
28586665 | 19801 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 19802 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 19803 | |
1c809c68 TT |
19804 | /* A variable with DW_AT_external is never static, |
19805 | but it may be block-scoped. */ | |
19806 | list_to_add = (cu->list_in_scope == &file_symbols | |
19807 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 19808 | } |
c906108c | 19809 | else |
e37fd15a | 19810 | list_to_add = cu->list_in_scope; |
c906108c SS |
19811 | } |
19812 | else | |
19813 | { | |
19814 | /* We do not know the address of this symbol. | |
c5aa993b JM |
19815 | If it is an external symbol and we have type information |
19816 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
19817 | The address of the variable will then be determined from | |
19818 | the minimal symbol table whenever the variable is | |
19819 | referenced. */ | |
e142c38c | 19820 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
19821 | |
19822 | /* Fortran explicitly imports any global symbols to the local | |
19823 | scope by DW_TAG_common_block. */ | |
19824 | if (cu->language == language_fortran && die->parent | |
19825 | && die->parent->tag == DW_TAG_common_block) | |
19826 | { | |
19827 | /* SYMBOL_CLASS doesn't matter here because | |
19828 | read_common_block is going to reset it. */ | |
19829 | if (!suppress_add) | |
19830 | list_to_add = cu->list_in_scope; | |
19831 | } | |
19832 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
19833 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 19834 | { |
0fe7935b DJ |
19835 | /* A variable with DW_AT_external is never static, but it |
19836 | may be block-scoped. */ | |
19837 | list_to_add = (cu->list_in_scope == &file_symbols | |
19838 | ? &global_symbols : cu->list_in_scope); | |
19839 | ||
f1e6e072 | 19840 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 19841 | } |
442ddf59 JK |
19842 | else if (!die_is_declaration (die, cu)) |
19843 | { | |
19844 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
19845 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
19846 | if (!suppress_add) |
19847 | list_to_add = cu->list_in_scope; | |
442ddf59 | 19848 | } |
c906108c SS |
19849 | } |
19850 | break; | |
19851 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
19852 | /* If we are inside a function, mark this as an argument. If |
19853 | not, we might be looking at an argument to an inlined function | |
19854 | when we do not have enough information to show inlined frames; | |
19855 | pretend it's a local variable in that case so that the user can | |
19856 | still see it. */ | |
19857 | if (context_stack_depth > 0 | |
19858 | && context_stack[context_stack_depth - 1].name != NULL) | |
19859 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 19860 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19861 | if (attr) |
19862 | { | |
e7c27a73 | 19863 | var_decode_location (attr, sym, cu); |
c906108c | 19864 | } |
e142c38c | 19865 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19866 | if (attr) |
19867 | { | |
e7c27a73 | 19868 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19869 | } |
f346a30d | 19870 | |
e37fd15a | 19871 | list_to_add = cu->list_in_scope; |
c906108c SS |
19872 | break; |
19873 | case DW_TAG_unspecified_parameters: | |
19874 | /* From varargs functions; gdb doesn't seem to have any | |
19875 | interest in this information, so just ignore it for now. | |
19876 | (FIXME?) */ | |
19877 | break; | |
34eaf542 TT |
19878 | case DW_TAG_template_type_param: |
19879 | suppress_add = 1; | |
19880 | /* Fall through. */ | |
c906108c | 19881 | case DW_TAG_class_type: |
680b30c7 | 19882 | case DW_TAG_interface_type: |
c906108c SS |
19883 | case DW_TAG_structure_type: |
19884 | case DW_TAG_union_type: | |
72019c9c | 19885 | case DW_TAG_set_type: |
c906108c | 19886 | case DW_TAG_enumeration_type: |
f1e6e072 | 19887 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19888 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 19889 | |
63d06c5c | 19890 | { |
9c37b5ae | 19891 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
19892 | really ever be static objects: otherwise, if you try |
19893 | to, say, break of a class's method and you're in a file | |
19894 | which doesn't mention that class, it won't work unless | |
19895 | the check for all static symbols in lookup_symbol_aux | |
19896 | saves you. See the OtherFileClass tests in | |
19897 | gdb.c++/namespace.exp. */ | |
19898 | ||
e37fd15a | 19899 | if (!suppress_add) |
34eaf542 | 19900 | { |
34eaf542 | 19901 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19902 | && cu->language == language_cplus |
34eaf542 | 19903 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19904 | |
64382290 | 19905 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 19906 | ... }" also defines a typedef for "foo". */ |
64382290 | 19907 | if (cu->language == language_cplus |
45280282 | 19908 | || cu->language == language_ada |
c44af4eb TT |
19909 | || cu->language == language_d |
19910 | || cu->language == language_rust) | |
64382290 TT |
19911 | { |
19912 | /* The symbol's name is already allocated along | |
19913 | with this objfile, so we don't need to | |
19914 | duplicate it for the type. */ | |
19915 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
19916 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
19917 | } | |
63d06c5c DC |
19918 | } |
19919 | } | |
c906108c SS |
19920 | break; |
19921 | case DW_TAG_typedef: | |
f1e6e072 | 19922 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 19923 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19924 | list_to_add = cu->list_in_scope; |
63d06c5c | 19925 | break; |
c906108c | 19926 | case DW_TAG_base_type: |
a02abb62 | 19927 | case DW_TAG_subrange_type: |
f1e6e072 | 19928 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19929 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19930 | list_to_add = cu->list_in_scope; |
c906108c SS |
19931 | break; |
19932 | case DW_TAG_enumerator: | |
e142c38c | 19933 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19934 | if (attr) |
19935 | { | |
e7c27a73 | 19936 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19937 | } |
63d06c5c DC |
19938 | { |
19939 | /* NOTE: carlton/2003-11-10: See comment above in the | |
19940 | DW_TAG_class_type, etc. block. */ | |
19941 | ||
e142c38c | 19942 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19943 | && cu->language == language_cplus |
e142c38c | 19944 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19945 | } |
c906108c | 19946 | break; |
74921315 | 19947 | case DW_TAG_imported_declaration: |
5c4e30ca | 19948 | case DW_TAG_namespace: |
f1e6e072 | 19949 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 19950 | list_to_add = &global_symbols; |
5c4e30ca | 19951 | break; |
530e8392 KB |
19952 | case DW_TAG_module: |
19953 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
19954 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
19955 | list_to_add = &global_symbols; | |
19956 | break; | |
4357ac6c | 19957 | case DW_TAG_common_block: |
f1e6e072 | 19958 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
19959 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
19960 | add_symbol_to_list (sym, cu->list_in_scope); | |
19961 | break; | |
c906108c SS |
19962 | default: |
19963 | /* Not a tag we recognize. Hopefully we aren't processing | |
19964 | trash data, but since we must specifically ignore things | |
19965 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 19966 | this point. */ |
e2e0b3e5 | 19967 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 19968 | dwarf_tag_name (die->tag)); |
c906108c SS |
19969 | break; |
19970 | } | |
df8a16a1 | 19971 | |
e37fd15a SW |
19972 | if (suppress_add) |
19973 | { | |
19974 | sym->hash_next = objfile->template_symbols; | |
19975 | objfile->template_symbols = sym; | |
19976 | list_to_add = NULL; | |
19977 | } | |
19978 | ||
19979 | if (list_to_add != NULL) | |
19980 | add_symbol_to_list (sym, list_to_add); | |
19981 | ||
df8a16a1 DJ |
19982 | /* For the benefit of old versions of GCC, check for anonymous |
19983 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 19984 | if (!cu->processing_has_namespace_info |
94af9270 | 19985 | && cu->language == language_cplus) |
a10964d1 | 19986 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
19987 | } |
19988 | return (sym); | |
19989 | } | |
19990 | ||
34eaf542 TT |
19991 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
19992 | ||
19993 | static struct symbol * | |
19994 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
19995 | { | |
19996 | return new_symbol_full (die, type, cu, NULL); | |
19997 | } | |
19998 | ||
98bfdba5 PA |
19999 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20000 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20001 | standard (v4) is not entirely clear about the meaning of using | |
20002 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20003 | wider than the data. The conclusion of a discussion on the DWARF | |
20004 | list was that this is unspecified. We choose to always zero-extend | |
20005 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20006 | |
98bfdba5 | 20007 | static gdb_byte * |
ff39bb5e | 20008 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20009 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20010 | { |
e7c27a73 | 20011 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
20012 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20013 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20014 | LONGEST l = DW_UNSND (attr); |
20015 | ||
20016 | if (bits < sizeof (*value) * 8) | |
20017 | { | |
20018 | l &= ((LONGEST) 1 << bits) - 1; | |
20019 | *value = l; | |
20020 | } | |
20021 | else if (bits == sizeof (*value) * 8) | |
20022 | *value = l; | |
20023 | else | |
20024 | { | |
224c3ddb | 20025 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20026 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20027 | return bytes; | |
20028 | } | |
20029 | ||
20030 | return NULL; | |
20031 | } | |
20032 | ||
20033 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20034 | the value does not fit in *VALUE, set *BYTES - either already | |
20035 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20036 | or, set *BATON, if we translated the constant to a location | |
20037 | expression. */ | |
20038 | ||
20039 | static void | |
ff39bb5e | 20040 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20041 | const char *name, struct obstack *obstack, |
20042 | struct dwarf2_cu *cu, | |
d521ce57 | 20043 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20044 | struct dwarf2_locexpr_baton **baton) |
20045 | { | |
20046 | struct objfile *objfile = cu->objfile; | |
20047 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 20048 | struct dwarf_block *blk; |
98bfdba5 PA |
20049 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20050 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20051 | ||
20052 | *value = 0; | |
20053 | *bytes = NULL; | |
20054 | *baton = NULL; | |
c906108c SS |
20055 | |
20056 | switch (attr->form) | |
20057 | { | |
20058 | case DW_FORM_addr: | |
3019eac3 | 20059 | case DW_FORM_GNU_addr_index: |
ac56253d | 20060 | { |
ac56253d TT |
20061 | gdb_byte *data; |
20062 | ||
98bfdba5 PA |
20063 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20064 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20065 | cu_header->addr_size, |
98bfdba5 | 20066 | TYPE_LENGTH (type)); |
ac56253d TT |
20067 | /* Symbols of this form are reasonably rare, so we just |
20068 | piggyback on the existing location code rather than writing | |
20069 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20070 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20071 | (*baton)->per_cu = cu->per_cu; |
20072 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20073 | |
98bfdba5 | 20074 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20075 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20076 | (*baton)->data = data; |
ac56253d TT |
20077 | |
20078 | data[0] = DW_OP_addr; | |
20079 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20080 | byte_order, DW_ADDR (attr)); | |
20081 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20082 | } |
c906108c | 20083 | break; |
4ac36638 | 20084 | case DW_FORM_string: |
93b5768b | 20085 | case DW_FORM_strp: |
3019eac3 | 20086 | case DW_FORM_GNU_str_index: |
36586728 | 20087 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
20088 | /* DW_STRING is already allocated on the objfile obstack, point |
20089 | directly to it. */ | |
d521ce57 | 20090 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 20091 | break; |
c906108c SS |
20092 | case DW_FORM_block1: |
20093 | case DW_FORM_block2: | |
20094 | case DW_FORM_block4: | |
20095 | case DW_FORM_block: | |
2dc7f7b3 | 20096 | case DW_FORM_exprloc: |
0224619f | 20097 | case DW_FORM_data16: |
c906108c | 20098 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
20099 | if (TYPE_LENGTH (type) != blk->size) |
20100 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
20101 | TYPE_LENGTH (type)); | |
20102 | *bytes = blk->data; | |
c906108c | 20103 | break; |
2df3850c JM |
20104 | |
20105 | /* The DW_AT_const_value attributes are supposed to carry the | |
20106 | symbol's value "represented as it would be on the target | |
20107 | architecture." By the time we get here, it's already been | |
20108 | converted to host endianness, so we just need to sign- or | |
20109 | zero-extend it as appropriate. */ | |
20110 | case DW_FORM_data1: | |
3aef2284 | 20111 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 20112 | break; |
c906108c | 20113 | case DW_FORM_data2: |
3aef2284 | 20114 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 20115 | break; |
c906108c | 20116 | case DW_FORM_data4: |
3aef2284 | 20117 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 20118 | break; |
c906108c | 20119 | case DW_FORM_data8: |
3aef2284 | 20120 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
20121 | break; |
20122 | ||
c906108c | 20123 | case DW_FORM_sdata: |
663c44ac | 20124 | case DW_FORM_implicit_const: |
98bfdba5 | 20125 | *value = DW_SND (attr); |
2df3850c JM |
20126 | break; |
20127 | ||
c906108c | 20128 | case DW_FORM_udata: |
98bfdba5 | 20129 | *value = DW_UNSND (attr); |
c906108c | 20130 | break; |
2df3850c | 20131 | |
c906108c | 20132 | default: |
4d3c2250 | 20133 | complaint (&symfile_complaints, |
e2e0b3e5 | 20134 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 20135 | dwarf_form_name (attr->form)); |
98bfdba5 | 20136 | *value = 0; |
c906108c SS |
20137 | break; |
20138 | } | |
20139 | } | |
20140 | ||
2df3850c | 20141 | |
98bfdba5 PA |
20142 | /* Copy constant value from an attribute to a symbol. */ |
20143 | ||
2df3850c | 20144 | static void |
ff39bb5e | 20145 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 20146 | struct dwarf2_cu *cu) |
2df3850c | 20147 | { |
98bfdba5 | 20148 | struct objfile *objfile = cu->objfile; |
12df843f | 20149 | LONGEST value; |
d521ce57 | 20150 | const gdb_byte *bytes; |
98bfdba5 | 20151 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 20152 | |
98bfdba5 PA |
20153 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
20154 | SYMBOL_PRINT_NAME (sym), | |
20155 | &objfile->objfile_obstack, cu, | |
20156 | &value, &bytes, &baton); | |
2df3850c | 20157 | |
98bfdba5 PA |
20158 | if (baton != NULL) |
20159 | { | |
98bfdba5 | 20160 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 20161 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
20162 | } |
20163 | else if (bytes != NULL) | |
20164 | { | |
20165 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 20166 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
20167 | } |
20168 | else | |
20169 | { | |
20170 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 20171 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 20172 | } |
2df3850c JM |
20173 | } |
20174 | ||
c906108c SS |
20175 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
20176 | ||
20177 | static struct type * | |
e7c27a73 | 20178 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20179 | { |
c906108c | 20180 | struct attribute *type_attr; |
c906108c | 20181 | |
e142c38c | 20182 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
20183 | if (!type_attr) |
20184 | { | |
20185 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 20186 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 20187 | } |
348e048f | 20188 | |
673bfd45 | 20189 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20190 | } |
20191 | ||
b4ba55a1 JB |
20192 | /* True iff CU's producer generates GNAT Ada auxiliary information |
20193 | that allows to find parallel types through that information instead | |
20194 | of having to do expensive parallel lookups by type name. */ | |
20195 | ||
20196 | static int | |
20197 | need_gnat_info (struct dwarf2_cu *cu) | |
20198 | { | |
20199 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
20200 | of GNAT produces this auxiliary information, without any indication | |
20201 | that it is produced. Part of enhancing the FSF version of GNAT | |
20202 | to produce that information will be to put in place an indicator | |
20203 | that we can use in order to determine whether the descriptive type | |
20204 | info is available or not. One suggestion that has been made is | |
20205 | to use a new attribute, attached to the CU die. For now, assume | |
20206 | that the descriptive type info is not available. */ | |
20207 | return 0; | |
20208 | } | |
20209 | ||
b4ba55a1 JB |
20210 | /* Return the auxiliary type of the die in question using its |
20211 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
20212 | attribute is not present. */ | |
20213 | ||
20214 | static struct type * | |
20215 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
20216 | { | |
b4ba55a1 | 20217 | struct attribute *type_attr; |
b4ba55a1 JB |
20218 | |
20219 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
20220 | if (!type_attr) | |
20221 | return NULL; | |
20222 | ||
673bfd45 | 20223 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
20224 | } |
20225 | ||
20226 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
20227 | descriptive type accordingly. */ | |
20228 | ||
20229 | static void | |
20230 | set_descriptive_type (struct type *type, struct die_info *die, | |
20231 | struct dwarf2_cu *cu) | |
20232 | { | |
20233 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
20234 | ||
20235 | if (descriptive_type) | |
20236 | { | |
20237 | ALLOCATE_GNAT_AUX_TYPE (type); | |
20238 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
20239 | } | |
20240 | } | |
20241 | ||
c906108c SS |
20242 | /* Return the containing type of the die in question using its |
20243 | DW_AT_containing_type attribute. */ | |
20244 | ||
20245 | static struct type * | |
e7c27a73 | 20246 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20247 | { |
c906108c | 20248 | struct attribute *type_attr; |
c906108c | 20249 | |
e142c38c | 20250 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
20251 | if (!type_attr) |
20252 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 20253 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 20254 | |
673bfd45 | 20255 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20256 | } |
20257 | ||
ac9ec31b DE |
20258 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
20259 | ||
20260 | static struct type * | |
20261 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
20262 | { | |
20263 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
20264 | char *message, *saved; | |
20265 | ||
20266 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 20267 | objfile_name (objfile), |
9c541725 PA |
20268 | to_underlying (cu->header.sect_off), |
20269 | to_underlying (die->sect_off)); | |
224c3ddb SM |
20270 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
20271 | message, strlen (message)); | |
ac9ec31b DE |
20272 | xfree (message); |
20273 | ||
19f392bc | 20274 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
20275 | } |
20276 | ||
673bfd45 | 20277 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
20278 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
20279 | DW_AT_containing_type. | |
673bfd45 DE |
20280 | If there is no type substitute an error marker. */ |
20281 | ||
c906108c | 20282 | static struct type * |
ff39bb5e | 20283 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 20284 | struct dwarf2_cu *cu) |
c906108c | 20285 | { |
bb5ed363 | 20286 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
20287 | struct type *this_type; |
20288 | ||
ac9ec31b DE |
20289 | gdb_assert (attr->name == DW_AT_type |
20290 | || attr->name == DW_AT_GNAT_descriptive_type | |
20291 | || attr->name == DW_AT_containing_type); | |
20292 | ||
673bfd45 DE |
20293 | /* First see if we have it cached. */ |
20294 | ||
36586728 TT |
20295 | if (attr->form == DW_FORM_GNU_ref_alt) |
20296 | { | |
20297 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 20298 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 20299 | |
9c541725 PA |
20300 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
20301 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 20302 | } |
7771576e | 20303 | else if (attr_form_is_ref (attr)) |
673bfd45 | 20304 | { |
9c541725 | 20305 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 20306 | |
9c541725 | 20307 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 20308 | } |
55f1336d | 20309 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 20310 | { |
ac9ec31b | 20311 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 20312 | |
ac9ec31b | 20313 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
20314 | } |
20315 | else | |
20316 | { | |
ac9ec31b DE |
20317 | complaint (&symfile_complaints, |
20318 | _("Dwarf Error: Bad type attribute %s in DIE" | |
20319 | " at 0x%x [in module %s]"), | |
9c541725 | 20320 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 20321 | objfile_name (objfile)); |
ac9ec31b | 20322 | return build_error_marker_type (cu, die); |
673bfd45 DE |
20323 | } |
20324 | ||
20325 | /* If not cached we need to read it in. */ | |
20326 | ||
20327 | if (this_type == NULL) | |
20328 | { | |
ac9ec31b | 20329 | struct die_info *type_die = NULL; |
673bfd45 DE |
20330 | struct dwarf2_cu *type_cu = cu; |
20331 | ||
7771576e | 20332 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20333 | type_die = follow_die_ref (die, attr, &type_cu); |
20334 | if (type_die == NULL) | |
20335 | return build_error_marker_type (cu, die); | |
20336 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
20337 | from an inter-CU reference and the type's CU got expanded before |
20338 | ours. */ | |
ac9ec31b | 20339 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
20340 | } |
20341 | ||
20342 | /* If we still don't have a type use an error marker. */ | |
20343 | ||
20344 | if (this_type == NULL) | |
ac9ec31b | 20345 | return build_error_marker_type (cu, die); |
673bfd45 | 20346 | |
f792889a | 20347 | return this_type; |
c906108c SS |
20348 | } |
20349 | ||
673bfd45 DE |
20350 | /* Return the type in DIE, CU. |
20351 | Returns NULL for invalid types. | |
20352 | ||
02142a6c | 20353 | This first does a lookup in die_type_hash, |
673bfd45 DE |
20354 | and only reads the die in if necessary. |
20355 | ||
20356 | NOTE: This can be called when reading in partial or full symbols. */ | |
20357 | ||
f792889a | 20358 | static struct type * |
e7c27a73 | 20359 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20360 | { |
f792889a DJ |
20361 | struct type *this_type; |
20362 | ||
20363 | this_type = get_die_type (die, cu); | |
20364 | if (this_type) | |
20365 | return this_type; | |
20366 | ||
673bfd45 DE |
20367 | return read_type_die_1 (die, cu); |
20368 | } | |
20369 | ||
20370 | /* Read the type in DIE, CU. | |
20371 | Returns NULL for invalid types. */ | |
20372 | ||
20373 | static struct type * | |
20374 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
20375 | { | |
20376 | struct type *this_type = NULL; | |
20377 | ||
c906108c SS |
20378 | switch (die->tag) |
20379 | { | |
20380 | case DW_TAG_class_type: | |
680b30c7 | 20381 | case DW_TAG_interface_type: |
c906108c SS |
20382 | case DW_TAG_structure_type: |
20383 | case DW_TAG_union_type: | |
f792889a | 20384 | this_type = read_structure_type (die, cu); |
c906108c SS |
20385 | break; |
20386 | case DW_TAG_enumeration_type: | |
f792889a | 20387 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
20388 | break; |
20389 | case DW_TAG_subprogram: | |
20390 | case DW_TAG_subroutine_type: | |
edb3359d | 20391 | case DW_TAG_inlined_subroutine: |
f792889a | 20392 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
20393 | break; |
20394 | case DW_TAG_array_type: | |
f792889a | 20395 | this_type = read_array_type (die, cu); |
c906108c | 20396 | break; |
72019c9c | 20397 | case DW_TAG_set_type: |
f792889a | 20398 | this_type = read_set_type (die, cu); |
72019c9c | 20399 | break; |
c906108c | 20400 | case DW_TAG_pointer_type: |
f792889a | 20401 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
20402 | break; |
20403 | case DW_TAG_ptr_to_member_type: | |
f792889a | 20404 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
20405 | break; |
20406 | case DW_TAG_reference_type: | |
4297a3f0 AV |
20407 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
20408 | break; | |
20409 | case DW_TAG_rvalue_reference_type: | |
20410 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
20411 | break; |
20412 | case DW_TAG_const_type: | |
f792889a | 20413 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
20414 | break; |
20415 | case DW_TAG_volatile_type: | |
f792889a | 20416 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 20417 | break; |
06d66ee9 TT |
20418 | case DW_TAG_restrict_type: |
20419 | this_type = read_tag_restrict_type (die, cu); | |
20420 | break; | |
c906108c | 20421 | case DW_TAG_string_type: |
f792889a | 20422 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
20423 | break; |
20424 | case DW_TAG_typedef: | |
f792889a | 20425 | this_type = read_typedef (die, cu); |
c906108c | 20426 | break; |
a02abb62 | 20427 | case DW_TAG_subrange_type: |
f792889a | 20428 | this_type = read_subrange_type (die, cu); |
a02abb62 | 20429 | break; |
c906108c | 20430 | case DW_TAG_base_type: |
f792889a | 20431 | this_type = read_base_type (die, cu); |
c906108c | 20432 | break; |
81a17f79 | 20433 | case DW_TAG_unspecified_type: |
f792889a | 20434 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 20435 | break; |
0114d602 DJ |
20436 | case DW_TAG_namespace: |
20437 | this_type = read_namespace_type (die, cu); | |
20438 | break; | |
f55ee35c JK |
20439 | case DW_TAG_module: |
20440 | this_type = read_module_type (die, cu); | |
20441 | break; | |
a2c2acaf MW |
20442 | case DW_TAG_atomic_type: |
20443 | this_type = read_tag_atomic_type (die, cu); | |
20444 | break; | |
c906108c | 20445 | default: |
3e43a32a MS |
20446 | complaint (&symfile_complaints, |
20447 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 20448 | dwarf_tag_name (die->tag)); |
c906108c SS |
20449 | break; |
20450 | } | |
63d06c5c | 20451 | |
f792889a | 20452 | return this_type; |
63d06c5c DC |
20453 | } |
20454 | ||
abc72ce4 DE |
20455 | /* See if we can figure out if the class lives in a namespace. We do |
20456 | this by looking for a member function; its demangled name will | |
20457 | contain namespace info, if there is any. | |
20458 | Return the computed name or NULL. | |
20459 | Space for the result is allocated on the objfile's obstack. | |
20460 | This is the full-die version of guess_partial_die_structure_name. | |
20461 | In this case we know DIE has no useful parent. */ | |
20462 | ||
20463 | static char * | |
20464 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
20465 | { | |
20466 | struct die_info *spec_die; | |
20467 | struct dwarf2_cu *spec_cu; | |
20468 | struct die_info *child; | |
20469 | ||
20470 | spec_cu = cu; | |
20471 | spec_die = die_specification (die, &spec_cu); | |
20472 | if (spec_die != NULL) | |
20473 | { | |
20474 | die = spec_die; | |
20475 | cu = spec_cu; | |
20476 | } | |
20477 | ||
20478 | for (child = die->child; | |
20479 | child != NULL; | |
20480 | child = child->sibling) | |
20481 | { | |
20482 | if (child->tag == DW_TAG_subprogram) | |
20483 | { | |
73b9be8b | 20484 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 20485 | |
7d45c7c3 | 20486 | if (linkage_name != NULL) |
abc72ce4 DE |
20487 | { |
20488 | char *actual_name | |
20489 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 20490 | linkage_name); |
abc72ce4 DE |
20491 | char *name = NULL; |
20492 | ||
20493 | if (actual_name != NULL) | |
20494 | { | |
15d034d0 | 20495 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
20496 | |
20497 | if (die_name != NULL | |
20498 | && strcmp (die_name, actual_name) != 0) | |
20499 | { | |
20500 | /* Strip off the class name from the full name. | |
20501 | We want the prefix. */ | |
20502 | int die_name_len = strlen (die_name); | |
20503 | int actual_name_len = strlen (actual_name); | |
20504 | ||
20505 | /* Test for '::' as a sanity check. */ | |
20506 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
20507 | && actual_name[actual_name_len |
20508 | - die_name_len - 1] == ':') | |
224c3ddb SM |
20509 | name = (char *) obstack_copy0 ( |
20510 | &cu->objfile->per_bfd->storage_obstack, | |
20511 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
20512 | } |
20513 | } | |
20514 | xfree (actual_name); | |
20515 | return name; | |
20516 | } | |
20517 | } | |
20518 | } | |
20519 | ||
20520 | return NULL; | |
20521 | } | |
20522 | ||
96408a79 SA |
20523 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
20524 | prefix part in such case. See | |
20525 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20526 | ||
a121b7c1 | 20527 | static const char * |
96408a79 SA |
20528 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
20529 | { | |
20530 | struct attribute *attr; | |
e6a959d6 | 20531 | const char *base; |
96408a79 SA |
20532 | |
20533 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
20534 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
20535 | return NULL; | |
20536 | ||
7d45c7c3 | 20537 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
20538 | return NULL; |
20539 | ||
73b9be8b | 20540 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
20541 | if (attr == NULL || DW_STRING (attr) == NULL) |
20542 | return NULL; | |
20543 | ||
20544 | /* dwarf2_name had to be already called. */ | |
20545 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
20546 | ||
20547 | /* Strip the base name, keep any leading namespaces/classes. */ | |
20548 | base = strrchr (DW_STRING (attr), ':'); | |
20549 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
20550 | return ""; | |
20551 | ||
224c3ddb SM |
20552 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
20553 | DW_STRING (attr), | |
20554 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
20555 | } |
20556 | ||
fdde2d81 | 20557 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 20558 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 20559 | |
0114d602 DJ |
20560 | For example, if we're within the method foo() in the following |
20561 | code: | |
20562 | ||
20563 | namespace N { | |
20564 | class C { | |
20565 | void foo () { | |
20566 | } | |
20567 | }; | |
20568 | } | |
20569 | ||
20570 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 20571 | |
0d5cff50 | 20572 | static const char * |
e142c38c | 20573 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 20574 | { |
0114d602 DJ |
20575 | struct die_info *parent, *spec_die; |
20576 | struct dwarf2_cu *spec_cu; | |
20577 | struct type *parent_type; | |
a121b7c1 | 20578 | const char *retval; |
63d06c5c | 20579 | |
9c37b5ae | 20580 | if (cu->language != language_cplus |
c44af4eb TT |
20581 | && cu->language != language_fortran && cu->language != language_d |
20582 | && cu->language != language_rust) | |
0114d602 DJ |
20583 | return ""; |
20584 | ||
96408a79 SA |
20585 | retval = anonymous_struct_prefix (die, cu); |
20586 | if (retval) | |
20587 | return retval; | |
20588 | ||
0114d602 DJ |
20589 | /* We have to be careful in the presence of DW_AT_specification. |
20590 | For example, with GCC 3.4, given the code | |
20591 | ||
20592 | namespace N { | |
20593 | void foo() { | |
20594 | // Definition of N::foo. | |
20595 | } | |
20596 | } | |
20597 | ||
20598 | then we'll have a tree of DIEs like this: | |
20599 | ||
20600 | 1: DW_TAG_compile_unit | |
20601 | 2: DW_TAG_namespace // N | |
20602 | 3: DW_TAG_subprogram // declaration of N::foo | |
20603 | 4: DW_TAG_subprogram // definition of N::foo | |
20604 | DW_AT_specification // refers to die #3 | |
20605 | ||
20606 | Thus, when processing die #4, we have to pretend that we're in | |
20607 | the context of its DW_AT_specification, namely the contex of die | |
20608 | #3. */ | |
20609 | spec_cu = cu; | |
20610 | spec_die = die_specification (die, &spec_cu); | |
20611 | if (spec_die == NULL) | |
20612 | parent = die->parent; | |
20613 | else | |
63d06c5c | 20614 | { |
0114d602 DJ |
20615 | parent = spec_die->parent; |
20616 | cu = spec_cu; | |
63d06c5c | 20617 | } |
0114d602 DJ |
20618 | |
20619 | if (parent == NULL) | |
20620 | return ""; | |
98bfdba5 PA |
20621 | else if (parent->building_fullname) |
20622 | { | |
20623 | const char *name; | |
20624 | const char *parent_name; | |
20625 | ||
20626 | /* It has been seen on RealView 2.2 built binaries, | |
20627 | DW_TAG_template_type_param types actually _defined_ as | |
20628 | children of the parent class: | |
20629 | ||
20630 | enum E {}; | |
20631 | template class <class Enum> Class{}; | |
20632 | Class<enum E> class_e; | |
20633 | ||
20634 | 1: DW_TAG_class_type (Class) | |
20635 | 2: DW_TAG_enumeration_type (E) | |
20636 | 3: DW_TAG_enumerator (enum1:0) | |
20637 | 3: DW_TAG_enumerator (enum2:1) | |
20638 | ... | |
20639 | 2: DW_TAG_template_type_param | |
20640 | DW_AT_type DW_FORM_ref_udata (E) | |
20641 | ||
20642 | Besides being broken debug info, it can put GDB into an | |
20643 | infinite loop. Consider: | |
20644 | ||
20645 | When we're building the full name for Class<E>, we'll start | |
20646 | at Class, and go look over its template type parameters, | |
20647 | finding E. We'll then try to build the full name of E, and | |
20648 | reach here. We're now trying to build the full name of E, | |
20649 | and look over the parent DIE for containing scope. In the | |
20650 | broken case, if we followed the parent DIE of E, we'd again | |
20651 | find Class, and once again go look at its template type | |
20652 | arguments, etc., etc. Simply don't consider such parent die | |
20653 | as source-level parent of this die (it can't be, the language | |
20654 | doesn't allow it), and break the loop here. */ | |
20655 | name = dwarf2_name (die, cu); | |
20656 | parent_name = dwarf2_name (parent, cu); | |
20657 | complaint (&symfile_complaints, | |
20658 | _("template param type '%s' defined within parent '%s'"), | |
20659 | name ? name : "<unknown>", | |
20660 | parent_name ? parent_name : "<unknown>"); | |
20661 | return ""; | |
20662 | } | |
63d06c5c | 20663 | else |
0114d602 DJ |
20664 | switch (parent->tag) |
20665 | { | |
63d06c5c | 20666 | case DW_TAG_namespace: |
0114d602 | 20667 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20668 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20669 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20670 | Work around this problem here. */ | |
20671 | if (cu->language == language_cplus | |
20672 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
20673 | return ""; | |
0114d602 DJ |
20674 | /* We give a name to even anonymous namespaces. */ |
20675 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 20676 | case DW_TAG_class_type: |
680b30c7 | 20677 | case DW_TAG_interface_type: |
63d06c5c | 20678 | case DW_TAG_structure_type: |
0114d602 | 20679 | case DW_TAG_union_type: |
f55ee35c | 20680 | case DW_TAG_module: |
0114d602 DJ |
20681 | parent_type = read_type_die (parent, cu); |
20682 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20683 | return TYPE_TAG_NAME (parent_type); | |
20684 | else | |
20685 | /* An anonymous structure is only allowed non-static data | |
20686 | members; no typedefs, no member functions, et cetera. | |
20687 | So it does not need a prefix. */ | |
20688 | return ""; | |
abc72ce4 | 20689 | case DW_TAG_compile_unit: |
95554aad | 20690 | case DW_TAG_partial_unit: |
abc72ce4 DE |
20691 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
20692 | if (cu->language == language_cplus | |
8b70b953 | 20693 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
20694 | && die->child != NULL |
20695 | && (die->tag == DW_TAG_class_type | |
20696 | || die->tag == DW_TAG_structure_type | |
20697 | || die->tag == DW_TAG_union_type)) | |
20698 | { | |
20699 | char *name = guess_full_die_structure_name (die, cu); | |
20700 | if (name != NULL) | |
20701 | return name; | |
20702 | } | |
20703 | return ""; | |
3d567982 TT |
20704 | case DW_TAG_enumeration_type: |
20705 | parent_type = read_type_die (parent, cu); | |
20706 | if (TYPE_DECLARED_CLASS (parent_type)) | |
20707 | { | |
20708 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20709 | return TYPE_TAG_NAME (parent_type); | |
20710 | return ""; | |
20711 | } | |
20712 | /* Fall through. */ | |
63d06c5c | 20713 | default: |
8176b9b8 | 20714 | return determine_prefix (parent, cu); |
63d06c5c | 20715 | } |
63d06c5c DC |
20716 | } |
20717 | ||
3e43a32a MS |
20718 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
20719 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
20720 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
20721 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
20722 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 20723 | |
f55ee35c | 20724 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
20725 | |
20726 | static char * | |
f55ee35c JK |
20727 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
20728 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 20729 | { |
f55ee35c | 20730 | const char *lead = ""; |
5c315b68 | 20731 | const char *sep; |
63d06c5c | 20732 | |
3e43a32a MS |
20733 | if (suffix == NULL || suffix[0] == '\0' |
20734 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 20735 | sep = ""; |
45280282 IB |
20736 | else if (cu->language == language_d) |
20737 | { | |
20738 | /* For D, the 'main' function could be defined in any module, but it | |
20739 | should never be prefixed. */ | |
20740 | if (strcmp (suffix, "D main") == 0) | |
20741 | { | |
20742 | prefix = ""; | |
20743 | sep = ""; | |
20744 | } | |
20745 | else | |
20746 | sep = "."; | |
20747 | } | |
f55ee35c JK |
20748 | else if (cu->language == language_fortran && physname) |
20749 | { | |
20750 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
20751 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
20752 | ||
20753 | lead = "__"; | |
20754 | sep = "_MOD_"; | |
20755 | } | |
987504bb JJ |
20756 | else |
20757 | sep = "::"; | |
63d06c5c | 20758 | |
6dd47d34 DE |
20759 | if (prefix == NULL) |
20760 | prefix = ""; | |
20761 | if (suffix == NULL) | |
20762 | suffix = ""; | |
20763 | ||
987504bb JJ |
20764 | if (obs == NULL) |
20765 | { | |
3e43a32a | 20766 | char *retval |
224c3ddb SM |
20767 | = ((char *) |
20768 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 20769 | |
f55ee35c JK |
20770 | strcpy (retval, lead); |
20771 | strcat (retval, prefix); | |
6dd47d34 DE |
20772 | strcat (retval, sep); |
20773 | strcat (retval, suffix); | |
63d06c5c DC |
20774 | return retval; |
20775 | } | |
987504bb JJ |
20776 | else |
20777 | { | |
20778 | /* We have an obstack. */ | |
f55ee35c | 20779 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 20780 | } |
63d06c5c DC |
20781 | } |
20782 | ||
c906108c SS |
20783 | /* Return sibling of die, NULL if no sibling. */ |
20784 | ||
f9aca02d | 20785 | static struct die_info * |
fba45db2 | 20786 | sibling_die (struct die_info *die) |
c906108c | 20787 | { |
639d11d3 | 20788 | return die->sibling; |
c906108c SS |
20789 | } |
20790 | ||
71c25dea TT |
20791 | /* Get name of a die, return NULL if not found. */ |
20792 | ||
15d034d0 TT |
20793 | static const char * |
20794 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
20795 | struct obstack *obstack) |
20796 | { | |
20797 | if (name && cu->language == language_cplus) | |
20798 | { | |
2f408ecb | 20799 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 20800 | |
2f408ecb | 20801 | if (!canon_name.empty ()) |
71c25dea | 20802 | { |
2f408ecb PA |
20803 | if (canon_name != name) |
20804 | name = (const char *) obstack_copy0 (obstack, | |
20805 | canon_name.c_str (), | |
20806 | canon_name.length ()); | |
71c25dea TT |
20807 | } |
20808 | } | |
20809 | ||
20810 | return name; | |
c906108c SS |
20811 | } |
20812 | ||
96553a0c DE |
20813 | /* Get name of a die, return NULL if not found. |
20814 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 20815 | |
15d034d0 | 20816 | static const char * |
e142c38c | 20817 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
20818 | { |
20819 | struct attribute *attr; | |
20820 | ||
e142c38c | 20821 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 20822 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 20823 | && die->tag != DW_TAG_namespace |
53832f31 TT |
20824 | && die->tag != DW_TAG_class_type |
20825 | && die->tag != DW_TAG_interface_type | |
20826 | && die->tag != DW_TAG_structure_type | |
20827 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
20828 | return NULL; |
20829 | ||
20830 | switch (die->tag) | |
20831 | { | |
20832 | case DW_TAG_compile_unit: | |
95554aad | 20833 | case DW_TAG_partial_unit: |
71c25dea TT |
20834 | /* Compilation units have a DW_AT_name that is a filename, not |
20835 | a source language identifier. */ | |
20836 | case DW_TAG_enumeration_type: | |
20837 | case DW_TAG_enumerator: | |
20838 | /* These tags always have simple identifiers already; no need | |
20839 | to canonicalize them. */ | |
20840 | return DW_STRING (attr); | |
907af001 | 20841 | |
96553a0c DE |
20842 | case DW_TAG_namespace: |
20843 | if (attr != NULL && DW_STRING (attr) != NULL) | |
20844 | return DW_STRING (attr); | |
20845 | return CP_ANONYMOUS_NAMESPACE_STR; | |
20846 | ||
907af001 UW |
20847 | case DW_TAG_class_type: |
20848 | case DW_TAG_interface_type: | |
20849 | case DW_TAG_structure_type: | |
20850 | case DW_TAG_union_type: | |
20851 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
20852 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
20853 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
20854 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 20855 | if (attr && DW_STRING (attr) |
61012eef GB |
20856 | && (startswith (DW_STRING (attr), "._") |
20857 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 20858 | return NULL; |
53832f31 TT |
20859 | |
20860 | /* GCC might emit a nameless typedef that has a linkage name. See | |
20861 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20862 | if (!attr || DW_STRING (attr) == NULL) | |
20863 | { | |
df5c6c50 | 20864 | char *demangled = NULL; |
53832f31 | 20865 | |
73b9be8b | 20866 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
20867 | if (attr == NULL || DW_STRING (attr) == NULL) |
20868 | return NULL; | |
20869 | ||
df5c6c50 JK |
20870 | /* Avoid demangling DW_STRING (attr) the second time on a second |
20871 | call for the same DIE. */ | |
20872 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 20873 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
20874 | |
20875 | if (demangled) | |
20876 | { | |
e6a959d6 | 20877 | const char *base; |
96408a79 | 20878 | |
53832f31 | 20879 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 20880 | DW_STRING (attr) |
224c3ddb SM |
20881 | = ((const char *) |
20882 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
20883 | demangled, strlen (demangled))); | |
53832f31 TT |
20884 | DW_STRING_IS_CANONICAL (attr) = 1; |
20885 | xfree (demangled); | |
96408a79 SA |
20886 | |
20887 | /* Strip any leading namespaces/classes, keep only the base name. | |
20888 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
20889 | base = strrchr (DW_STRING (attr), ':'); | |
20890 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
20891 | return &base[1]; | |
20892 | else | |
20893 | return DW_STRING (attr); | |
53832f31 TT |
20894 | } |
20895 | } | |
907af001 UW |
20896 | break; |
20897 | ||
71c25dea | 20898 | default: |
907af001 UW |
20899 | break; |
20900 | } | |
20901 | ||
20902 | if (!DW_STRING_IS_CANONICAL (attr)) | |
20903 | { | |
20904 | DW_STRING (attr) | |
20905 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 20906 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 20907 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 20908 | } |
907af001 | 20909 | return DW_STRING (attr); |
9219021c DC |
20910 | } |
20911 | ||
20912 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
20913 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
20914 | containing the return value on output. */ | |
9219021c DC |
20915 | |
20916 | static struct die_info * | |
f2f0e013 | 20917 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
20918 | { |
20919 | struct attribute *attr; | |
9219021c | 20920 | |
f2f0e013 | 20921 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
20922 | if (attr == NULL) |
20923 | return NULL; | |
20924 | ||
f2f0e013 | 20925 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
20926 | } |
20927 | ||
c906108c SS |
20928 | /* Convert a DIE tag into its string name. */ |
20929 | ||
f39c6ffd | 20930 | static const char * |
aa1ee363 | 20931 | dwarf_tag_name (unsigned tag) |
c906108c | 20932 | { |
f39c6ffd TT |
20933 | const char *name = get_DW_TAG_name (tag); |
20934 | ||
20935 | if (name == NULL) | |
20936 | return "DW_TAG_<unknown>"; | |
20937 | ||
20938 | return name; | |
c906108c SS |
20939 | } |
20940 | ||
20941 | /* Convert a DWARF attribute code into its string name. */ | |
20942 | ||
f39c6ffd | 20943 | static const char * |
aa1ee363 | 20944 | dwarf_attr_name (unsigned attr) |
c906108c | 20945 | { |
f39c6ffd TT |
20946 | const char *name; |
20947 | ||
c764a876 | 20948 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
20949 | if (attr == DW_AT_MIPS_fde) |
20950 | return "DW_AT_MIPS_fde"; | |
20951 | #else | |
20952 | if (attr == DW_AT_HP_block_index) | |
20953 | return "DW_AT_HP_block_index"; | |
c764a876 | 20954 | #endif |
f39c6ffd TT |
20955 | |
20956 | name = get_DW_AT_name (attr); | |
20957 | ||
20958 | if (name == NULL) | |
20959 | return "DW_AT_<unknown>"; | |
20960 | ||
20961 | return name; | |
c906108c SS |
20962 | } |
20963 | ||
20964 | /* Convert a DWARF value form code into its string name. */ | |
20965 | ||
f39c6ffd | 20966 | static const char * |
aa1ee363 | 20967 | dwarf_form_name (unsigned form) |
c906108c | 20968 | { |
f39c6ffd TT |
20969 | const char *name = get_DW_FORM_name (form); |
20970 | ||
20971 | if (name == NULL) | |
20972 | return "DW_FORM_<unknown>"; | |
20973 | ||
20974 | return name; | |
c906108c SS |
20975 | } |
20976 | ||
a121b7c1 | 20977 | static const char * |
fba45db2 | 20978 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
20979 | { |
20980 | if (mybool) | |
20981 | return "TRUE"; | |
20982 | else | |
20983 | return "FALSE"; | |
20984 | } | |
20985 | ||
20986 | /* Convert a DWARF type code into its string name. */ | |
20987 | ||
f39c6ffd | 20988 | static const char * |
aa1ee363 | 20989 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 20990 | { |
f39c6ffd | 20991 | const char *name = get_DW_ATE_name (enc); |
c906108c | 20992 | |
f39c6ffd TT |
20993 | if (name == NULL) |
20994 | return "DW_ATE_<unknown>"; | |
c906108c | 20995 | |
f39c6ffd | 20996 | return name; |
c906108c | 20997 | } |
c906108c | 20998 | |
f9aca02d | 20999 | static void |
d97bc12b | 21000 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21001 | { |
21002 | unsigned int i; | |
21003 | ||
d97bc12b DE |
21004 | print_spaces (indent, f); |
21005 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
21006 | dwarf_tag_name (die->tag), die->abbrev, |
21007 | to_underlying (die->sect_off)); | |
d97bc12b DE |
21008 | |
21009 | if (die->parent != NULL) | |
21010 | { | |
21011 | print_spaces (indent, f); | |
21012 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 21013 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
21014 | } |
21015 | ||
21016 | print_spaces (indent, f); | |
21017 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21018 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21019 | |
d97bc12b DE |
21020 | print_spaces (indent, f); |
21021 | fprintf_unfiltered (f, " attributes:\n"); | |
21022 | ||
c906108c SS |
21023 | for (i = 0; i < die->num_attrs; ++i) |
21024 | { | |
d97bc12b DE |
21025 | print_spaces (indent, f); |
21026 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21027 | dwarf_attr_name (die->attrs[i].name), |
21028 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21029 | |
c906108c SS |
21030 | switch (die->attrs[i].form) |
21031 | { | |
c906108c | 21032 | case DW_FORM_addr: |
3019eac3 | 21033 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21034 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21035 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21036 | break; |
21037 | case DW_FORM_block2: | |
21038 | case DW_FORM_block4: | |
21039 | case DW_FORM_block: | |
21040 | case DW_FORM_block1: | |
56eb65bd SP |
21041 | fprintf_unfiltered (f, "block: size %s", |
21042 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21043 | break; |
2dc7f7b3 | 21044 | case DW_FORM_exprloc: |
56eb65bd SP |
21045 | fprintf_unfiltered (f, "expression: size %s", |
21046 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21047 | break; |
0224619f JK |
21048 | case DW_FORM_data16: |
21049 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21050 | break; | |
4568ecf9 DE |
21051 | case DW_FORM_ref_addr: |
21052 | fprintf_unfiltered (f, "ref address: "); | |
21053 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21054 | break; | |
36586728 TT |
21055 | case DW_FORM_GNU_ref_alt: |
21056 | fprintf_unfiltered (f, "alt ref address: "); | |
21057 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21058 | break; | |
10b3939b DJ |
21059 | case DW_FORM_ref1: |
21060 | case DW_FORM_ref2: | |
21061 | case DW_FORM_ref4: | |
4568ecf9 DE |
21062 | case DW_FORM_ref8: |
21063 | case DW_FORM_ref_udata: | |
d97bc12b | 21064 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21065 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21066 | break; |
c906108c SS |
21067 | case DW_FORM_data1: |
21068 | case DW_FORM_data2: | |
21069 | case DW_FORM_data4: | |
ce5d95e1 | 21070 | case DW_FORM_data8: |
c906108c SS |
21071 | case DW_FORM_udata: |
21072 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21073 | fprintf_unfiltered (f, "constant: %s", |
21074 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21075 | break; |
2dc7f7b3 TT |
21076 | case DW_FORM_sec_offset: |
21077 | fprintf_unfiltered (f, "section offset: %s", | |
21078 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21079 | break; | |
55f1336d | 21080 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21081 | fprintf_unfiltered (f, "signature: %s", |
21082 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21083 | break; |
c906108c | 21084 | case DW_FORM_string: |
4bdf3d34 | 21085 | case DW_FORM_strp: |
43988095 | 21086 | case DW_FORM_line_strp: |
3019eac3 | 21087 | case DW_FORM_GNU_str_index: |
36586728 | 21088 | case DW_FORM_GNU_strp_alt: |
8285870a | 21089 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 21090 | DW_STRING (&die->attrs[i]) |
8285870a JK |
21091 | ? DW_STRING (&die->attrs[i]) : "", |
21092 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
21093 | break; |
21094 | case DW_FORM_flag: | |
21095 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 21096 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 21097 | else |
d97bc12b | 21098 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 21099 | break; |
2dc7f7b3 TT |
21100 | case DW_FORM_flag_present: |
21101 | fprintf_unfiltered (f, "flag: TRUE"); | |
21102 | break; | |
a8329558 | 21103 | case DW_FORM_indirect: |
0963b4bd MS |
21104 | /* The reader will have reduced the indirect form to |
21105 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
21106 | fprintf_unfiltered (f, |
21107 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 21108 | break; |
663c44ac JK |
21109 | case DW_FORM_implicit_const: |
21110 | fprintf_unfiltered (f, "constant: %s", | |
21111 | plongest (DW_SND (&die->attrs[i]))); | |
21112 | break; | |
c906108c | 21113 | default: |
d97bc12b | 21114 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 21115 | die->attrs[i].form); |
d97bc12b | 21116 | break; |
c906108c | 21117 | } |
d97bc12b | 21118 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
21119 | } |
21120 | } | |
21121 | ||
f9aca02d | 21122 | static void |
d97bc12b | 21123 | dump_die_for_error (struct die_info *die) |
c906108c | 21124 | { |
d97bc12b DE |
21125 | dump_die_shallow (gdb_stderr, 0, die); |
21126 | } | |
21127 | ||
21128 | static void | |
21129 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
21130 | { | |
21131 | int indent = level * 4; | |
21132 | ||
21133 | gdb_assert (die != NULL); | |
21134 | ||
21135 | if (level >= max_level) | |
21136 | return; | |
21137 | ||
21138 | dump_die_shallow (f, indent, die); | |
21139 | ||
21140 | if (die->child != NULL) | |
c906108c | 21141 | { |
d97bc12b DE |
21142 | print_spaces (indent, f); |
21143 | fprintf_unfiltered (f, " Children:"); | |
21144 | if (level + 1 < max_level) | |
21145 | { | |
21146 | fprintf_unfiltered (f, "\n"); | |
21147 | dump_die_1 (f, level + 1, max_level, die->child); | |
21148 | } | |
21149 | else | |
21150 | { | |
3e43a32a MS |
21151 | fprintf_unfiltered (f, |
21152 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
21153 | } |
21154 | } | |
21155 | ||
21156 | if (die->sibling != NULL && level > 0) | |
21157 | { | |
21158 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
21159 | } |
21160 | } | |
21161 | ||
d97bc12b DE |
21162 | /* This is called from the pdie macro in gdbinit.in. |
21163 | It's not static so gcc will keep a copy callable from gdb. */ | |
21164 | ||
21165 | void | |
21166 | dump_die (struct die_info *die, int max_level) | |
21167 | { | |
21168 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
21169 | } | |
21170 | ||
f9aca02d | 21171 | static void |
51545339 | 21172 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21173 | { |
51545339 | 21174 | void **slot; |
c906108c | 21175 | |
9c541725 PA |
21176 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
21177 | to_underlying (die->sect_off), | |
b64f50a1 | 21178 | INSERT); |
51545339 DJ |
21179 | |
21180 | *slot = die; | |
c906108c SS |
21181 | } |
21182 | ||
b64f50a1 JK |
21183 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
21184 | required kind. */ | |
21185 | ||
21186 | static sect_offset | |
ff39bb5e | 21187 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 21188 | { |
7771576e | 21189 | if (attr_form_is_ref (attr)) |
9c541725 | 21190 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
21191 | |
21192 | complaint (&symfile_complaints, | |
21193 | _("unsupported die ref attribute form: '%s'"), | |
21194 | dwarf_form_name (attr->form)); | |
9c541725 | 21195 | return {}; |
c906108c SS |
21196 | } |
21197 | ||
43bbcdc2 PH |
21198 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
21199 | * the value held by the attribute is not constant. */ | |
a02abb62 | 21200 | |
43bbcdc2 | 21201 | static LONGEST |
ff39bb5e | 21202 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 21203 | { |
663c44ac | 21204 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
21205 | return DW_SND (attr); |
21206 | else if (attr->form == DW_FORM_udata | |
21207 | || attr->form == DW_FORM_data1 | |
21208 | || attr->form == DW_FORM_data2 | |
21209 | || attr->form == DW_FORM_data4 | |
21210 | || attr->form == DW_FORM_data8) | |
21211 | return DW_UNSND (attr); | |
21212 | else | |
21213 | { | |
0224619f | 21214 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
21215 | complaint (&symfile_complaints, |
21216 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
21217 | dwarf_form_name (attr->form)); |
21218 | return default_value; | |
21219 | } | |
21220 | } | |
21221 | ||
348e048f DE |
21222 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
21223 | On entry *REF_CU is the CU of SRC_DIE. | |
21224 | On exit *REF_CU is the CU of the result. */ | |
21225 | ||
21226 | static struct die_info * | |
ff39bb5e | 21227 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
21228 | struct dwarf2_cu **ref_cu) |
21229 | { | |
21230 | struct die_info *die; | |
21231 | ||
7771576e | 21232 | if (attr_form_is_ref (attr)) |
348e048f | 21233 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 21234 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
21235 | die = follow_die_sig (src_die, attr, ref_cu); |
21236 | else | |
21237 | { | |
21238 | dump_die_for_error (src_die); | |
21239 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 21240 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
21241 | } |
21242 | ||
21243 | return die; | |
03dd20cc DJ |
21244 | } |
21245 | ||
5c631832 | 21246 | /* Follow reference OFFSET. |
673bfd45 DE |
21247 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
21248 | On exit *REF_CU is the CU of the result. | |
21249 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 21250 | |
f9aca02d | 21251 | static struct die_info * |
9c541725 | 21252 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 21253 | struct dwarf2_cu **ref_cu) |
c906108c | 21254 | { |
10b3939b | 21255 | struct die_info temp_die; |
f2f0e013 | 21256 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 21257 | |
348e048f DE |
21258 | gdb_assert (cu->per_cu != NULL); |
21259 | ||
98bfdba5 PA |
21260 | target_cu = cu; |
21261 | ||
3019eac3 | 21262 | if (cu->per_cu->is_debug_types) |
348e048f DE |
21263 | { |
21264 | /* .debug_types CUs cannot reference anything outside their CU. | |
21265 | If they need to, they have to reference a signatured type via | |
55f1336d | 21266 | DW_FORM_ref_sig8. */ |
9c541725 | 21267 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 21268 | return NULL; |
348e048f | 21269 | } |
36586728 | 21270 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 21271 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
21272 | { |
21273 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 21274 | |
9c541725 | 21275 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 21276 | cu->objfile); |
03dd20cc DJ |
21277 | |
21278 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
21279 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
21280 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 21281 | |
10b3939b DJ |
21282 | target_cu = per_cu->cu; |
21283 | } | |
98bfdba5 PA |
21284 | else if (cu->dies == NULL) |
21285 | { | |
21286 | /* We're loading full DIEs during partial symbol reading. */ | |
21287 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 21288 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 21289 | } |
c906108c | 21290 | |
f2f0e013 | 21291 | *ref_cu = target_cu; |
9c541725 | 21292 | temp_die.sect_off = sect_off; |
9a3c8263 | 21293 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
21294 | &temp_die, |
21295 | to_underlying (sect_off)); | |
5c631832 | 21296 | } |
10b3939b | 21297 | |
5c631832 JK |
21298 | /* Follow reference attribute ATTR of SRC_DIE. |
21299 | On entry *REF_CU is the CU of SRC_DIE. | |
21300 | On exit *REF_CU is the CU of the result. */ | |
21301 | ||
21302 | static struct die_info * | |
ff39bb5e | 21303 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
21304 | struct dwarf2_cu **ref_cu) |
21305 | { | |
9c541725 | 21306 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
21307 | struct dwarf2_cu *cu = *ref_cu; |
21308 | struct die_info *die; | |
21309 | ||
9c541725 | 21310 | die = follow_die_offset (sect_off, |
36586728 TT |
21311 | (attr->form == DW_FORM_GNU_ref_alt |
21312 | || cu->per_cu->is_dwz), | |
21313 | ref_cu); | |
5c631832 JK |
21314 | if (!die) |
21315 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
21316 | "at 0x%x [in module %s]"), | |
9c541725 | 21317 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 21318 | objfile_name (cu->objfile)); |
348e048f | 21319 | |
5c631832 JK |
21320 | return die; |
21321 | } | |
21322 | ||
9c541725 | 21323 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
21324 | Returned value is intended for DW_OP_call*. Returned |
21325 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
21326 | |
21327 | struct dwarf2_locexpr_baton | |
9c541725 | 21328 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
21329 | struct dwarf2_per_cu_data *per_cu, |
21330 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21331 | void *baton) | |
5c631832 | 21332 | { |
918dd910 | 21333 | struct dwarf2_cu *cu; |
5c631832 JK |
21334 | struct die_info *die; |
21335 | struct attribute *attr; | |
21336 | struct dwarf2_locexpr_baton retval; | |
21337 | ||
8cf6f0b1 TT |
21338 | dw2_setup (per_cu->objfile); |
21339 | ||
918dd910 JK |
21340 | if (per_cu->cu == NULL) |
21341 | load_cu (per_cu); | |
21342 | cu = per_cu->cu; | |
cc12ce38 DE |
21343 | if (cu == NULL) |
21344 | { | |
21345 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21346 | Instead just throw an error, not much else we can do. */ | |
21347 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21348 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21349 | } |
918dd910 | 21350 | |
9c541725 | 21351 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
21352 | if (!die) |
21353 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21354 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21355 | |
21356 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21357 | if (!attr) | |
21358 | { | |
e103e986 JK |
21359 | /* DWARF: "If there is no such attribute, then there is no effect.". |
21360 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 21361 | |
e103e986 | 21362 | retval.data = NULL; |
5c631832 JK |
21363 | retval.size = 0; |
21364 | } | |
8cf6f0b1 TT |
21365 | else if (attr_form_is_section_offset (attr)) |
21366 | { | |
21367 | struct dwarf2_loclist_baton loclist_baton; | |
21368 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
21369 | size_t size; | |
21370 | ||
21371 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
21372 | ||
21373 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
21374 | &size, pc); | |
21375 | retval.size = size; | |
21376 | } | |
5c631832 JK |
21377 | else |
21378 | { | |
21379 | if (!attr_form_is_block (attr)) | |
21380 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
21381 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 21382 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21383 | |
21384 | retval.data = DW_BLOCK (attr)->data; | |
21385 | retval.size = DW_BLOCK (attr)->size; | |
21386 | } | |
21387 | retval.per_cu = cu->per_cu; | |
918dd910 | 21388 | |
918dd910 JK |
21389 | age_cached_comp_units (); |
21390 | ||
5c631832 | 21391 | return retval; |
348e048f DE |
21392 | } |
21393 | ||
8b9737bf TT |
21394 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
21395 | offset. */ | |
21396 | ||
21397 | struct dwarf2_locexpr_baton | |
21398 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
21399 | struct dwarf2_per_cu_data *per_cu, | |
21400 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21401 | void *baton) | |
21402 | { | |
9c541725 | 21403 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 21404 | |
9c541725 | 21405 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
21406 | } |
21407 | ||
b6807d98 TT |
21408 | /* Write a constant of a given type as target-ordered bytes into |
21409 | OBSTACK. */ | |
21410 | ||
21411 | static const gdb_byte * | |
21412 | write_constant_as_bytes (struct obstack *obstack, | |
21413 | enum bfd_endian byte_order, | |
21414 | struct type *type, | |
21415 | ULONGEST value, | |
21416 | LONGEST *len) | |
21417 | { | |
21418 | gdb_byte *result; | |
21419 | ||
21420 | *len = TYPE_LENGTH (type); | |
224c3ddb | 21421 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21422 | store_unsigned_integer (result, *len, byte_order, value); |
21423 | ||
21424 | return result; | |
21425 | } | |
21426 | ||
21427 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
21428 | pointer to the constant bytes and set LEN to the length of the | |
21429 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
21430 | does not have a DW_AT_const_value, return NULL. */ | |
21431 | ||
21432 | const gdb_byte * | |
9c541725 | 21433 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
21434 | struct dwarf2_per_cu_data *per_cu, |
21435 | struct obstack *obstack, | |
21436 | LONGEST *len) | |
21437 | { | |
21438 | struct dwarf2_cu *cu; | |
21439 | struct die_info *die; | |
21440 | struct attribute *attr; | |
21441 | const gdb_byte *result = NULL; | |
21442 | struct type *type; | |
21443 | LONGEST value; | |
21444 | enum bfd_endian byte_order; | |
21445 | ||
21446 | dw2_setup (per_cu->objfile); | |
21447 | ||
21448 | if (per_cu->cu == NULL) | |
21449 | load_cu (per_cu); | |
21450 | cu = per_cu->cu; | |
cc12ce38 DE |
21451 | if (cu == NULL) |
21452 | { | |
21453 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21454 | Instead just throw an error, not much else we can do. */ | |
21455 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21456 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21457 | } |
b6807d98 | 21458 | |
9c541725 | 21459 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
21460 | if (!die) |
21461 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21462 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
21463 | |
21464 | ||
21465 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21466 | if (attr == NULL) | |
21467 | return NULL; | |
21468 | ||
21469 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
21470 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21471 | ||
21472 | switch (attr->form) | |
21473 | { | |
21474 | case DW_FORM_addr: | |
21475 | case DW_FORM_GNU_addr_index: | |
21476 | { | |
21477 | gdb_byte *tem; | |
21478 | ||
21479 | *len = cu->header.addr_size; | |
224c3ddb | 21480 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21481 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
21482 | result = tem; | |
21483 | } | |
21484 | break; | |
21485 | case DW_FORM_string: | |
21486 | case DW_FORM_strp: | |
21487 | case DW_FORM_GNU_str_index: | |
21488 | case DW_FORM_GNU_strp_alt: | |
21489 | /* DW_STRING is already allocated on the objfile obstack, point | |
21490 | directly to it. */ | |
21491 | result = (const gdb_byte *) DW_STRING (attr); | |
21492 | *len = strlen (DW_STRING (attr)); | |
21493 | break; | |
21494 | case DW_FORM_block1: | |
21495 | case DW_FORM_block2: | |
21496 | case DW_FORM_block4: | |
21497 | case DW_FORM_block: | |
21498 | case DW_FORM_exprloc: | |
0224619f | 21499 | case DW_FORM_data16: |
b6807d98 TT |
21500 | result = DW_BLOCK (attr)->data; |
21501 | *len = DW_BLOCK (attr)->size; | |
21502 | break; | |
21503 | ||
21504 | /* The DW_AT_const_value attributes are supposed to carry the | |
21505 | symbol's value "represented as it would be on the target | |
21506 | architecture." By the time we get here, it's already been | |
21507 | converted to host endianness, so we just need to sign- or | |
21508 | zero-extend it as appropriate. */ | |
21509 | case DW_FORM_data1: | |
21510 | type = die_type (die, cu); | |
21511 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
21512 | if (result == NULL) | |
21513 | result = write_constant_as_bytes (obstack, byte_order, | |
21514 | type, value, len); | |
21515 | break; | |
21516 | case DW_FORM_data2: | |
21517 | type = die_type (die, cu); | |
21518 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
21519 | if (result == NULL) | |
21520 | result = write_constant_as_bytes (obstack, byte_order, | |
21521 | type, value, len); | |
21522 | break; | |
21523 | case DW_FORM_data4: | |
21524 | type = die_type (die, cu); | |
21525 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
21526 | if (result == NULL) | |
21527 | result = write_constant_as_bytes (obstack, byte_order, | |
21528 | type, value, len); | |
21529 | break; | |
21530 | case DW_FORM_data8: | |
21531 | type = die_type (die, cu); | |
21532 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
21533 | if (result == NULL) | |
21534 | result = write_constant_as_bytes (obstack, byte_order, | |
21535 | type, value, len); | |
21536 | break; | |
21537 | ||
21538 | case DW_FORM_sdata: | |
663c44ac | 21539 | case DW_FORM_implicit_const: |
b6807d98 TT |
21540 | type = die_type (die, cu); |
21541 | result = write_constant_as_bytes (obstack, byte_order, | |
21542 | type, DW_SND (attr), len); | |
21543 | break; | |
21544 | ||
21545 | case DW_FORM_udata: | |
21546 | type = die_type (die, cu); | |
21547 | result = write_constant_as_bytes (obstack, byte_order, | |
21548 | type, DW_UNSND (attr), len); | |
21549 | break; | |
21550 | ||
21551 | default: | |
21552 | complaint (&symfile_complaints, | |
21553 | _("unsupported const value attribute form: '%s'"), | |
21554 | dwarf_form_name (attr->form)); | |
21555 | break; | |
21556 | } | |
21557 | ||
21558 | return result; | |
21559 | } | |
21560 | ||
7942e96e AA |
21561 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
21562 | valid type for this die is found. */ | |
21563 | ||
21564 | struct type * | |
9c541725 | 21565 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
21566 | struct dwarf2_per_cu_data *per_cu) |
21567 | { | |
21568 | struct dwarf2_cu *cu; | |
21569 | struct die_info *die; | |
21570 | ||
21571 | dw2_setup (per_cu->objfile); | |
21572 | ||
21573 | if (per_cu->cu == NULL) | |
21574 | load_cu (per_cu); | |
21575 | cu = per_cu->cu; | |
21576 | if (!cu) | |
21577 | return NULL; | |
21578 | ||
9c541725 | 21579 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
21580 | if (!die) |
21581 | return NULL; | |
21582 | ||
21583 | return die_type (die, cu); | |
21584 | } | |
21585 | ||
8a9b8146 TT |
21586 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
21587 | PER_CU. */ | |
21588 | ||
21589 | struct type * | |
b64f50a1 | 21590 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
21591 | struct dwarf2_per_cu_data *per_cu) |
21592 | { | |
8a9b8146 | 21593 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21594 | |
9c541725 | 21595 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21596 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21597 | } |
21598 | ||
ac9ec31b | 21599 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21600 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21601 | On exit *REF_CU is the CU of the result. |
21602 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21603 | |
21604 | static struct die_info * | |
ac9ec31b DE |
21605 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21606 | struct dwarf2_cu **ref_cu) | |
348e048f | 21607 | { |
348e048f | 21608 | struct die_info temp_die; |
348e048f DE |
21609 | struct dwarf2_cu *sig_cu; |
21610 | struct die_info *die; | |
21611 | ||
ac9ec31b DE |
21612 | /* While it might be nice to assert sig_type->type == NULL here, |
21613 | we can get here for DW_AT_imported_declaration where we need | |
21614 | the DIE not the type. */ | |
348e048f DE |
21615 | |
21616 | /* If necessary, add it to the queue and load its DIEs. */ | |
21617 | ||
95554aad | 21618 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21619 | read_signatured_type (sig_type); |
348e048f | 21620 | |
348e048f | 21621 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21622 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21623 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21624 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21625 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21626 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21627 | if (die) |
21628 | { | |
796a7ff8 DE |
21629 | /* For .gdb_index version 7 keep track of included TUs. |
21630 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21631 | if (dwarf2_per_objfile->index_table != NULL | |
21632 | && dwarf2_per_objfile->index_table->version <= 7) | |
21633 | { | |
21634 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21635 | (*ref_cu)->per_cu->imported_symtabs, | |
21636 | sig_cu->per_cu); | |
21637 | } | |
21638 | ||
348e048f DE |
21639 | *ref_cu = sig_cu; |
21640 | return die; | |
21641 | } | |
21642 | ||
ac9ec31b DE |
21643 | return NULL; |
21644 | } | |
21645 | ||
21646 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21647 | On entry *REF_CU is the CU of SRC_DIE. | |
21648 | On exit *REF_CU is the CU of the result. | |
21649 | The result is the DIE of the type. | |
21650 | If the referenced type cannot be found an error is thrown. */ | |
21651 | ||
21652 | static struct die_info * | |
ff39bb5e | 21653 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21654 | struct dwarf2_cu **ref_cu) |
21655 | { | |
21656 | ULONGEST signature = DW_SIGNATURE (attr); | |
21657 | struct signatured_type *sig_type; | |
21658 | struct die_info *die; | |
21659 | ||
21660 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21661 | ||
a2ce51a0 | 21662 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21663 | /* sig_type will be NULL if the signatured type is missing from |
21664 | the debug info. */ | |
21665 | if (sig_type == NULL) | |
21666 | { | |
21667 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21668 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21669 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21670 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21671 | } |
21672 | ||
21673 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
21674 | if (die == NULL) | |
21675 | { | |
21676 | dump_die_for_error (src_die); | |
21677 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21678 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21679 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21680 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21681 | } |
21682 | ||
21683 | return die; | |
21684 | } | |
21685 | ||
21686 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
21687 | reading in and processing the type unit if necessary. */ | |
21688 | ||
21689 | static struct type * | |
21690 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
21691 | struct dwarf2_cu *cu) | |
21692 | { | |
21693 | struct signatured_type *sig_type; | |
21694 | struct dwarf2_cu *type_cu; | |
21695 | struct die_info *type_die; | |
21696 | struct type *type; | |
21697 | ||
a2ce51a0 | 21698 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
21699 | /* sig_type will be NULL if the signatured type is missing from |
21700 | the debug info. */ | |
21701 | if (sig_type == NULL) | |
21702 | { | |
21703 | complaint (&symfile_complaints, | |
21704 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21705 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21706 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21707 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21708 | return build_error_marker_type (cu, die); |
21709 | } | |
21710 | ||
21711 | /* If we already know the type we're done. */ | |
21712 | if (sig_type->type != NULL) | |
21713 | return sig_type->type; | |
21714 | ||
21715 | type_cu = cu; | |
21716 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
21717 | if (type_die != NULL) | |
21718 | { | |
21719 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
21720 | is created. This is important, for example, because for c++ classes | |
21721 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
21722 | type = read_type_die (type_die, type_cu); | |
21723 | if (type == NULL) | |
21724 | { | |
21725 | complaint (&symfile_complaints, | |
21726 | _("Dwarf Error: Cannot build signatured type %s" | |
21727 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 21728 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21729 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21730 | type = build_error_marker_type (cu, die); |
21731 | } | |
21732 | } | |
21733 | else | |
21734 | { | |
21735 | complaint (&symfile_complaints, | |
21736 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21737 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21738 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21739 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21740 | type = build_error_marker_type (cu, die); |
21741 | } | |
21742 | sig_type->type = type; | |
21743 | ||
21744 | return type; | |
21745 | } | |
21746 | ||
21747 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
21748 | reading in and processing the type unit if necessary. */ | |
21749 | ||
21750 | static struct type * | |
ff39bb5e | 21751 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 21752 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
21753 | { |
21754 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 21755 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
21756 | { |
21757 | struct dwarf2_cu *type_cu = cu; | |
21758 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
21759 | ||
21760 | return read_type_die (type_die, type_cu); | |
21761 | } | |
21762 | else if (attr->form == DW_FORM_ref_sig8) | |
21763 | { | |
21764 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
21765 | } | |
21766 | else | |
21767 | { | |
21768 | complaint (&symfile_complaints, | |
21769 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
21770 | " at 0x%x [in module %s]"), | |
9c541725 | 21771 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 21772 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21773 | return build_error_marker_type (cu, die); |
21774 | } | |
348e048f DE |
21775 | } |
21776 | ||
e5fe5e75 | 21777 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
21778 | |
21779 | static void | |
e5fe5e75 | 21780 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 21781 | { |
52dc124a | 21782 | struct signatured_type *sig_type; |
348e048f | 21783 | |
f4dc4d17 DE |
21784 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
21785 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
21786 | ||
6721b2ec DE |
21787 | /* We have the per_cu, but we need the signatured_type. |
21788 | Fortunately this is an easy translation. */ | |
21789 | gdb_assert (per_cu->is_debug_types); | |
21790 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 21791 | |
6721b2ec | 21792 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21793 | |
52dc124a | 21794 | read_signatured_type (sig_type); |
348e048f | 21795 | |
6721b2ec | 21796 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
21797 | } |
21798 | ||
dee91e82 DE |
21799 | /* die_reader_func for read_signatured_type. |
21800 | This is identical to load_full_comp_unit_reader, | |
21801 | but is kept separate for now. */ | |
348e048f DE |
21802 | |
21803 | static void | |
dee91e82 | 21804 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 21805 | const gdb_byte *info_ptr, |
dee91e82 DE |
21806 | struct die_info *comp_unit_die, |
21807 | int has_children, | |
21808 | void *data) | |
348e048f | 21809 | { |
dee91e82 | 21810 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 21811 | |
dee91e82 DE |
21812 | gdb_assert (cu->die_hash == NULL); |
21813 | cu->die_hash = | |
21814 | htab_create_alloc_ex (cu->header.length / 12, | |
21815 | die_hash, | |
21816 | die_eq, | |
21817 | NULL, | |
21818 | &cu->comp_unit_obstack, | |
21819 | hashtab_obstack_allocate, | |
21820 | dummy_obstack_deallocate); | |
348e048f | 21821 | |
dee91e82 DE |
21822 | if (has_children) |
21823 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
21824 | &info_ptr, comp_unit_die); | |
21825 | cu->dies = comp_unit_die; | |
21826 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
21827 | |
21828 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 21829 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 21830 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
21831 | or we won't be able to build types correctly. |
21832 | Similarly, if we do not read the producer, we can not apply | |
21833 | producer-specific interpretation. */ | |
95554aad | 21834 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 21835 | } |
348e048f | 21836 | |
3019eac3 DE |
21837 | /* Read in a signatured type and build its CU and DIEs. |
21838 | If the type is a stub for the real type in a DWO file, | |
21839 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
21840 | |
21841 | static void | |
21842 | read_signatured_type (struct signatured_type *sig_type) | |
21843 | { | |
21844 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 21845 | |
3019eac3 | 21846 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 21847 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21848 | |
f4dc4d17 DE |
21849 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
21850 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 21851 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
21852 | } |
21853 | ||
c906108c SS |
21854 | /* Decode simple location descriptions. |
21855 | Given a pointer to a dwarf block that defines a location, compute | |
21856 | the location and return the value. | |
21857 | ||
4cecd739 DJ |
21858 | NOTE drow/2003-11-18: This function is called in two situations |
21859 | now: for the address of static or global variables (partial symbols | |
21860 | only) and for offsets into structures which are expected to be | |
21861 | (more or less) constant. The partial symbol case should go away, | |
21862 | and only the constant case should remain. That will let this | |
21863 | function complain more accurately. A few special modes are allowed | |
21864 | without complaint for global variables (for instance, global | |
21865 | register values and thread-local values). | |
c906108c SS |
21866 | |
21867 | A location description containing no operations indicates that the | |
4cecd739 | 21868 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
21869 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
21870 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
21871 | complaint. |
21872 | ||
21873 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
21874 | |
21875 | static CORE_ADDR | |
e7c27a73 | 21876 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 21877 | { |
e7c27a73 | 21878 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
21879 | size_t i; |
21880 | size_t size = blk->size; | |
d521ce57 | 21881 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
21882 | CORE_ADDR stack[64]; |
21883 | int stacki; | |
21884 | unsigned int bytes_read, unsnd; | |
21885 | gdb_byte op; | |
c906108c | 21886 | |
21ae7a4d JK |
21887 | i = 0; |
21888 | stacki = 0; | |
21889 | stack[stacki] = 0; | |
21890 | stack[++stacki] = 0; | |
21891 | ||
21892 | while (i < size) | |
21893 | { | |
21894 | op = data[i++]; | |
21895 | switch (op) | |
21896 | { | |
21897 | case DW_OP_lit0: | |
21898 | case DW_OP_lit1: | |
21899 | case DW_OP_lit2: | |
21900 | case DW_OP_lit3: | |
21901 | case DW_OP_lit4: | |
21902 | case DW_OP_lit5: | |
21903 | case DW_OP_lit6: | |
21904 | case DW_OP_lit7: | |
21905 | case DW_OP_lit8: | |
21906 | case DW_OP_lit9: | |
21907 | case DW_OP_lit10: | |
21908 | case DW_OP_lit11: | |
21909 | case DW_OP_lit12: | |
21910 | case DW_OP_lit13: | |
21911 | case DW_OP_lit14: | |
21912 | case DW_OP_lit15: | |
21913 | case DW_OP_lit16: | |
21914 | case DW_OP_lit17: | |
21915 | case DW_OP_lit18: | |
21916 | case DW_OP_lit19: | |
21917 | case DW_OP_lit20: | |
21918 | case DW_OP_lit21: | |
21919 | case DW_OP_lit22: | |
21920 | case DW_OP_lit23: | |
21921 | case DW_OP_lit24: | |
21922 | case DW_OP_lit25: | |
21923 | case DW_OP_lit26: | |
21924 | case DW_OP_lit27: | |
21925 | case DW_OP_lit28: | |
21926 | case DW_OP_lit29: | |
21927 | case DW_OP_lit30: | |
21928 | case DW_OP_lit31: | |
21929 | stack[++stacki] = op - DW_OP_lit0; | |
21930 | break; | |
f1bea926 | 21931 | |
21ae7a4d JK |
21932 | case DW_OP_reg0: |
21933 | case DW_OP_reg1: | |
21934 | case DW_OP_reg2: | |
21935 | case DW_OP_reg3: | |
21936 | case DW_OP_reg4: | |
21937 | case DW_OP_reg5: | |
21938 | case DW_OP_reg6: | |
21939 | case DW_OP_reg7: | |
21940 | case DW_OP_reg8: | |
21941 | case DW_OP_reg9: | |
21942 | case DW_OP_reg10: | |
21943 | case DW_OP_reg11: | |
21944 | case DW_OP_reg12: | |
21945 | case DW_OP_reg13: | |
21946 | case DW_OP_reg14: | |
21947 | case DW_OP_reg15: | |
21948 | case DW_OP_reg16: | |
21949 | case DW_OP_reg17: | |
21950 | case DW_OP_reg18: | |
21951 | case DW_OP_reg19: | |
21952 | case DW_OP_reg20: | |
21953 | case DW_OP_reg21: | |
21954 | case DW_OP_reg22: | |
21955 | case DW_OP_reg23: | |
21956 | case DW_OP_reg24: | |
21957 | case DW_OP_reg25: | |
21958 | case DW_OP_reg26: | |
21959 | case DW_OP_reg27: | |
21960 | case DW_OP_reg28: | |
21961 | case DW_OP_reg29: | |
21962 | case DW_OP_reg30: | |
21963 | case DW_OP_reg31: | |
21964 | stack[++stacki] = op - DW_OP_reg0; | |
21965 | if (i < size) | |
21966 | dwarf2_complex_location_expr_complaint (); | |
21967 | break; | |
c906108c | 21968 | |
21ae7a4d JK |
21969 | case DW_OP_regx: |
21970 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
21971 | i += bytes_read; | |
21972 | stack[++stacki] = unsnd; | |
21973 | if (i < size) | |
21974 | dwarf2_complex_location_expr_complaint (); | |
21975 | break; | |
c906108c | 21976 | |
21ae7a4d JK |
21977 | case DW_OP_addr: |
21978 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
21979 | cu, &bytes_read); | |
21980 | i += bytes_read; | |
21981 | break; | |
d53d4ac5 | 21982 | |
21ae7a4d JK |
21983 | case DW_OP_const1u: |
21984 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
21985 | i += 1; | |
21986 | break; | |
21987 | ||
21988 | case DW_OP_const1s: | |
21989 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
21990 | i += 1; | |
21991 | break; | |
21992 | ||
21993 | case DW_OP_const2u: | |
21994 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
21995 | i += 2; | |
21996 | break; | |
21997 | ||
21998 | case DW_OP_const2s: | |
21999 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22000 | i += 2; | |
22001 | break; | |
d53d4ac5 | 22002 | |
21ae7a4d JK |
22003 | case DW_OP_const4u: |
22004 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22005 | i += 4; | |
22006 | break; | |
22007 | ||
22008 | case DW_OP_const4s: | |
22009 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22010 | i += 4; | |
22011 | break; | |
22012 | ||
585861ea JK |
22013 | case DW_OP_const8u: |
22014 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22015 | i += 8; | |
22016 | break; | |
22017 | ||
21ae7a4d JK |
22018 | case DW_OP_constu: |
22019 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22020 | &bytes_read); | |
22021 | i += bytes_read; | |
22022 | break; | |
22023 | ||
22024 | case DW_OP_consts: | |
22025 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22026 | i += bytes_read; | |
22027 | break; | |
22028 | ||
22029 | case DW_OP_dup: | |
22030 | stack[stacki + 1] = stack[stacki]; | |
22031 | stacki++; | |
22032 | break; | |
22033 | ||
22034 | case DW_OP_plus: | |
22035 | stack[stacki - 1] += stack[stacki]; | |
22036 | stacki--; | |
22037 | break; | |
22038 | ||
22039 | case DW_OP_plus_uconst: | |
22040 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22041 | &bytes_read); | |
22042 | i += bytes_read; | |
22043 | break; | |
22044 | ||
22045 | case DW_OP_minus: | |
22046 | stack[stacki - 1] -= stack[stacki]; | |
22047 | stacki--; | |
22048 | break; | |
22049 | ||
22050 | case DW_OP_deref: | |
22051 | /* If we're not the last op, then we definitely can't encode | |
22052 | this using GDB's address_class enum. This is valid for partial | |
22053 | global symbols, although the variable's address will be bogus | |
22054 | in the psymtab. */ | |
22055 | if (i < size) | |
22056 | dwarf2_complex_location_expr_complaint (); | |
22057 | break; | |
22058 | ||
22059 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22060 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22061 | /* The top of the stack has the offset from the beginning |
22062 | of the thread control block at which the variable is located. */ | |
22063 | /* Nothing should follow this operator, so the top of stack would | |
22064 | be returned. */ | |
22065 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
22066 | address will be bogus in the psymtab. Make it always at least |
22067 | non-zero to not look as a variable garbage collected by linker | |
22068 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
22069 | if (i < size) |
22070 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 22071 | stack[stacki]++; |
21ae7a4d JK |
22072 | break; |
22073 | ||
22074 | case DW_OP_GNU_uninit: | |
22075 | break; | |
22076 | ||
3019eac3 | 22077 | case DW_OP_GNU_addr_index: |
49f6c839 | 22078 | case DW_OP_GNU_const_index: |
3019eac3 DE |
22079 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
22080 | &bytes_read); | |
22081 | i += bytes_read; | |
22082 | break; | |
22083 | ||
21ae7a4d JK |
22084 | default: |
22085 | { | |
f39c6ffd | 22086 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
22087 | |
22088 | if (name) | |
22089 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
22090 | name); | |
22091 | else | |
22092 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
22093 | op); | |
22094 | } | |
22095 | ||
22096 | return (stack[stacki]); | |
d53d4ac5 | 22097 | } |
3c6e0cb3 | 22098 | |
21ae7a4d JK |
22099 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
22100 | outside of the allocated space. Also enforce minimum>0. */ | |
22101 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
22102 | { | |
22103 | complaint (&symfile_complaints, | |
22104 | _("location description stack overflow")); | |
22105 | return 0; | |
22106 | } | |
22107 | ||
22108 | if (stacki <= 0) | |
22109 | { | |
22110 | complaint (&symfile_complaints, | |
22111 | _("location description stack underflow")); | |
22112 | return 0; | |
22113 | } | |
22114 | } | |
22115 | return (stack[stacki]); | |
c906108c SS |
22116 | } |
22117 | ||
22118 | /* memory allocation interface */ | |
22119 | ||
c906108c | 22120 | static struct dwarf_block * |
7b5a2f43 | 22121 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 22122 | { |
8d749320 | 22123 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
22124 | } |
22125 | ||
c906108c | 22126 | static struct die_info * |
b60c80d6 | 22127 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
22128 | { |
22129 | struct die_info *die; | |
b60c80d6 DJ |
22130 | size_t size = sizeof (struct die_info); |
22131 | ||
22132 | if (num_attrs > 1) | |
22133 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 22134 | |
b60c80d6 | 22135 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
22136 | memset (die, 0, sizeof (struct die_info)); |
22137 | return (die); | |
22138 | } | |
2e276125 JB |
22139 | |
22140 | \f | |
22141 | /* Macro support. */ | |
22142 | ||
233d95b5 JK |
22143 | /* Return file name relative to the compilation directory of file number I in |
22144 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 22145 | responsible for freeing it. */ |
233d95b5 | 22146 | |
2e276125 | 22147 | static char * |
233d95b5 | 22148 | file_file_name (int file, struct line_header *lh) |
2e276125 | 22149 | { |
6a83a1e6 EZ |
22150 | /* Is the file number a valid index into the line header's file name |
22151 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22152 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 22153 | { |
8c43009f | 22154 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 22155 | |
8c43009f PA |
22156 | if (!IS_ABSOLUTE_PATH (fe.name)) |
22157 | { | |
22158 | const char *dir = fe.include_dir (lh); | |
22159 | if (dir != NULL) | |
22160 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
22161 | } | |
22162 | return xstrdup (fe.name); | |
6a83a1e6 | 22163 | } |
2e276125 JB |
22164 | else |
22165 | { | |
6a83a1e6 EZ |
22166 | /* The compiler produced a bogus file number. We can at least |
22167 | record the macro definitions made in the file, even if we | |
22168 | won't be able to find the file by name. */ | |
22169 | char fake_name[80]; | |
9a619af0 | 22170 | |
8c042590 PM |
22171 | xsnprintf (fake_name, sizeof (fake_name), |
22172 | "<bad macro file number %d>", file); | |
2e276125 | 22173 | |
6e70227d | 22174 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
22175 | _("bad file number in macro information (%d)"), |
22176 | file); | |
2e276125 | 22177 | |
6a83a1e6 | 22178 | return xstrdup (fake_name); |
2e276125 JB |
22179 | } |
22180 | } | |
22181 | ||
233d95b5 JK |
22182 | /* Return the full name of file number I in *LH's file name table. |
22183 | Use COMP_DIR as the name of the current directory of the | |
22184 | compilation. The result is allocated using xmalloc; the caller is | |
22185 | responsible for freeing it. */ | |
22186 | static char * | |
22187 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
22188 | { | |
22189 | /* Is the file number a valid index into the line header's file name | |
22190 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22191 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
22192 | { |
22193 | char *relative = file_file_name (file, lh); | |
22194 | ||
22195 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
22196 | return relative; | |
b36cec19 PA |
22197 | return reconcat (relative, comp_dir, SLASH_STRING, |
22198 | relative, (char *) NULL); | |
233d95b5 JK |
22199 | } |
22200 | else | |
22201 | return file_file_name (file, lh); | |
22202 | } | |
22203 | ||
2e276125 JB |
22204 | |
22205 | static struct macro_source_file * | |
22206 | macro_start_file (int file, int line, | |
22207 | struct macro_source_file *current_file, | |
43f3e411 | 22208 | struct line_header *lh) |
2e276125 | 22209 | { |
233d95b5 JK |
22210 | /* File name relative to the compilation directory of this source file. */ |
22211 | char *file_name = file_file_name (file, lh); | |
2e276125 | 22212 | |
2e276125 | 22213 | if (! current_file) |
abc9d0dc | 22214 | { |
fc474241 DE |
22215 | /* Note: We don't create a macro table for this compilation unit |
22216 | at all until we actually get a filename. */ | |
43f3e411 | 22217 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 22218 | |
abc9d0dc TT |
22219 | /* If we have no current file, then this must be the start_file |
22220 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
22221 | current_file = macro_set_main (macro_table, file_name); |
22222 | macro_define_special (macro_table); | |
abc9d0dc | 22223 | } |
2e276125 | 22224 | else |
233d95b5 | 22225 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 22226 | |
233d95b5 | 22227 | xfree (file_name); |
6e70227d | 22228 | |
2e276125 JB |
22229 | return current_file; |
22230 | } | |
22231 | ||
2e276125 JB |
22232 | static const char * |
22233 | consume_improper_spaces (const char *p, const char *body) | |
22234 | { | |
22235 | if (*p == ' ') | |
22236 | { | |
4d3c2250 | 22237 | complaint (&symfile_complaints, |
3e43a32a MS |
22238 | _("macro definition contains spaces " |
22239 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 22240 | body); |
2e276125 JB |
22241 | |
22242 | while (*p == ' ') | |
22243 | p++; | |
22244 | } | |
22245 | ||
22246 | return p; | |
22247 | } | |
22248 | ||
22249 | ||
22250 | static void | |
22251 | parse_macro_definition (struct macro_source_file *file, int line, | |
22252 | const char *body) | |
22253 | { | |
22254 | const char *p; | |
22255 | ||
22256 | /* The body string takes one of two forms. For object-like macro | |
22257 | definitions, it should be: | |
22258 | ||
22259 | <macro name> " " <definition> | |
22260 | ||
22261 | For function-like macro definitions, it should be: | |
22262 | ||
22263 | <macro name> "() " <definition> | |
22264 | or | |
22265 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
22266 | ||
22267 | Spaces may appear only where explicitly indicated, and in the | |
22268 | <definition>. | |
22269 | ||
22270 | The Dwarf 2 spec says that an object-like macro's name is always | |
22271 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 22272 | the space when the macro's definition is the empty string. |
2e276125 JB |
22273 | |
22274 | The Dwarf 2 spec says that there should be no spaces between the | |
22275 | formal arguments in a function-like macro's formal argument list, | |
22276 | but versions of GCC around March 2002 include spaces after the | |
22277 | commas. */ | |
22278 | ||
22279 | ||
22280 | /* Find the extent of the macro name. The macro name is terminated | |
22281 | by either a space or null character (for an object-like macro) or | |
22282 | an opening paren (for a function-like macro). */ | |
22283 | for (p = body; *p; p++) | |
22284 | if (*p == ' ' || *p == '(') | |
22285 | break; | |
22286 | ||
22287 | if (*p == ' ' || *p == '\0') | |
22288 | { | |
22289 | /* It's an object-like macro. */ | |
22290 | int name_len = p - body; | |
3f8a7804 | 22291 | char *name = savestring (body, name_len); |
2e276125 JB |
22292 | const char *replacement; |
22293 | ||
22294 | if (*p == ' ') | |
22295 | replacement = body + name_len + 1; | |
22296 | else | |
22297 | { | |
4d3c2250 | 22298 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22299 | replacement = body + name_len; |
22300 | } | |
6e70227d | 22301 | |
2e276125 JB |
22302 | macro_define_object (file, line, name, replacement); |
22303 | ||
22304 | xfree (name); | |
22305 | } | |
22306 | else if (*p == '(') | |
22307 | { | |
22308 | /* It's a function-like macro. */ | |
3f8a7804 | 22309 | char *name = savestring (body, p - body); |
2e276125 JB |
22310 | int argc = 0; |
22311 | int argv_size = 1; | |
8d749320 | 22312 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
22313 | |
22314 | p++; | |
22315 | ||
22316 | p = consume_improper_spaces (p, body); | |
22317 | ||
22318 | /* Parse the formal argument list. */ | |
22319 | while (*p && *p != ')') | |
22320 | { | |
22321 | /* Find the extent of the current argument name. */ | |
22322 | const char *arg_start = p; | |
22323 | ||
22324 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
22325 | p++; | |
22326 | ||
22327 | if (! *p || p == arg_start) | |
4d3c2250 | 22328 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22329 | else |
22330 | { | |
22331 | /* Make sure argv has room for the new argument. */ | |
22332 | if (argc >= argv_size) | |
22333 | { | |
22334 | argv_size *= 2; | |
224c3ddb | 22335 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
22336 | } |
22337 | ||
3f8a7804 | 22338 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
22339 | } |
22340 | ||
22341 | p = consume_improper_spaces (p, body); | |
22342 | ||
22343 | /* Consume the comma, if present. */ | |
22344 | if (*p == ',') | |
22345 | { | |
22346 | p++; | |
22347 | ||
22348 | p = consume_improper_spaces (p, body); | |
22349 | } | |
22350 | } | |
22351 | ||
22352 | if (*p == ')') | |
22353 | { | |
22354 | p++; | |
22355 | ||
22356 | if (*p == ' ') | |
22357 | /* Perfectly formed definition, no complaints. */ | |
22358 | macro_define_function (file, line, name, | |
6e70227d | 22359 | argc, (const char **) argv, |
2e276125 JB |
22360 | p + 1); |
22361 | else if (*p == '\0') | |
22362 | { | |
22363 | /* Complain, but do define it. */ | |
4d3c2250 | 22364 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 22365 | macro_define_function (file, line, name, |
6e70227d | 22366 | argc, (const char **) argv, |
2e276125 JB |
22367 | p); |
22368 | } | |
22369 | else | |
22370 | /* Just complain. */ | |
4d3c2250 | 22371 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22372 | } |
22373 | else | |
22374 | /* Just complain. */ | |
4d3c2250 | 22375 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22376 | |
22377 | xfree (name); | |
22378 | { | |
22379 | int i; | |
22380 | ||
22381 | for (i = 0; i < argc; i++) | |
22382 | xfree (argv[i]); | |
22383 | } | |
22384 | xfree (argv); | |
22385 | } | |
22386 | else | |
4d3c2250 | 22387 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22388 | } |
22389 | ||
cf2c3c16 TT |
22390 | /* Skip some bytes from BYTES according to the form given in FORM. |
22391 | Returns the new pointer. */ | |
2e276125 | 22392 | |
d521ce57 TT |
22393 | static const gdb_byte * |
22394 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
22395 | enum dwarf_form form, |
22396 | unsigned int offset_size, | |
22397 | struct dwarf2_section_info *section) | |
2e276125 | 22398 | { |
cf2c3c16 | 22399 | unsigned int bytes_read; |
2e276125 | 22400 | |
cf2c3c16 | 22401 | switch (form) |
2e276125 | 22402 | { |
cf2c3c16 TT |
22403 | case DW_FORM_data1: |
22404 | case DW_FORM_flag: | |
22405 | ++bytes; | |
22406 | break; | |
22407 | ||
22408 | case DW_FORM_data2: | |
22409 | bytes += 2; | |
22410 | break; | |
22411 | ||
22412 | case DW_FORM_data4: | |
22413 | bytes += 4; | |
22414 | break; | |
22415 | ||
22416 | case DW_FORM_data8: | |
22417 | bytes += 8; | |
22418 | break; | |
22419 | ||
0224619f JK |
22420 | case DW_FORM_data16: |
22421 | bytes += 16; | |
22422 | break; | |
22423 | ||
cf2c3c16 TT |
22424 | case DW_FORM_string: |
22425 | read_direct_string (abfd, bytes, &bytes_read); | |
22426 | bytes += bytes_read; | |
22427 | break; | |
22428 | ||
22429 | case DW_FORM_sec_offset: | |
22430 | case DW_FORM_strp: | |
36586728 | 22431 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
22432 | bytes += offset_size; |
22433 | break; | |
22434 | ||
22435 | case DW_FORM_block: | |
22436 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
22437 | bytes += bytes_read; | |
22438 | break; | |
22439 | ||
22440 | case DW_FORM_block1: | |
22441 | bytes += 1 + read_1_byte (abfd, bytes); | |
22442 | break; | |
22443 | case DW_FORM_block2: | |
22444 | bytes += 2 + read_2_bytes (abfd, bytes); | |
22445 | break; | |
22446 | case DW_FORM_block4: | |
22447 | bytes += 4 + read_4_bytes (abfd, bytes); | |
22448 | break; | |
22449 | ||
22450 | case DW_FORM_sdata: | |
22451 | case DW_FORM_udata: | |
3019eac3 DE |
22452 | case DW_FORM_GNU_addr_index: |
22453 | case DW_FORM_GNU_str_index: | |
d521ce57 | 22454 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
22455 | if (bytes == NULL) |
22456 | { | |
22457 | dwarf2_section_buffer_overflow_complaint (section); | |
22458 | return NULL; | |
22459 | } | |
cf2c3c16 TT |
22460 | break; |
22461 | ||
663c44ac JK |
22462 | case DW_FORM_implicit_const: |
22463 | break; | |
22464 | ||
cf2c3c16 TT |
22465 | default: |
22466 | { | |
22467 | complain: | |
22468 | complaint (&symfile_complaints, | |
22469 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 22470 | form, get_section_name (section)); |
cf2c3c16 TT |
22471 | return NULL; |
22472 | } | |
2e276125 JB |
22473 | } |
22474 | ||
cf2c3c16 TT |
22475 | return bytes; |
22476 | } | |
757a13d0 | 22477 | |
cf2c3c16 TT |
22478 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
22479 | opcode. Returns an updated pointer to the macro data buffer; or, | |
22480 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 22481 | |
d521ce57 | 22482 | static const gdb_byte * |
cf2c3c16 | 22483 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
22484 | const gdb_byte **opcode_definitions, |
22485 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
22486 | bfd *abfd, |
22487 | unsigned int offset_size, | |
22488 | struct dwarf2_section_info *section) | |
22489 | { | |
22490 | unsigned int bytes_read, i; | |
22491 | unsigned long arg; | |
d521ce57 | 22492 | const gdb_byte *defn; |
2e276125 | 22493 | |
cf2c3c16 | 22494 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 22495 | { |
cf2c3c16 TT |
22496 | complaint (&symfile_complaints, |
22497 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
22498 | opcode); | |
22499 | return NULL; | |
22500 | } | |
2e276125 | 22501 | |
cf2c3c16 TT |
22502 | defn = opcode_definitions[opcode]; |
22503 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
22504 | defn += bytes_read; | |
2e276125 | 22505 | |
cf2c3c16 TT |
22506 | for (i = 0; i < arg; ++i) |
22507 | { | |
aead7601 SM |
22508 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
22509 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 22510 | section); |
cf2c3c16 TT |
22511 | if (mac_ptr == NULL) |
22512 | { | |
22513 | /* skip_form_bytes already issued the complaint. */ | |
22514 | return NULL; | |
22515 | } | |
22516 | } | |
757a13d0 | 22517 | |
cf2c3c16 TT |
22518 | return mac_ptr; |
22519 | } | |
757a13d0 | 22520 | |
cf2c3c16 TT |
22521 | /* A helper function which parses the header of a macro section. |
22522 | If the macro section is the extended (for now called "GNU") type, | |
22523 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
22524 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 22525 | |
d521ce57 TT |
22526 | static const gdb_byte * |
22527 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 22528 | bfd *abfd, |
d521ce57 | 22529 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
22530 | unsigned int *offset_size, |
22531 | int section_is_gnu) | |
22532 | { | |
22533 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 22534 | |
cf2c3c16 TT |
22535 | if (section_is_gnu) |
22536 | { | |
22537 | unsigned int version, flags; | |
757a13d0 | 22538 | |
cf2c3c16 | 22539 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 22540 | if (version != 4 && version != 5) |
cf2c3c16 TT |
22541 | { |
22542 | complaint (&symfile_complaints, | |
22543 | _("unrecognized version `%d' in .debug_macro section"), | |
22544 | version); | |
22545 | return NULL; | |
22546 | } | |
22547 | mac_ptr += 2; | |
757a13d0 | 22548 | |
cf2c3c16 TT |
22549 | flags = read_1_byte (abfd, mac_ptr); |
22550 | ++mac_ptr; | |
22551 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 22552 | |
cf2c3c16 TT |
22553 | if ((flags & 2) != 0) |
22554 | /* We don't need the line table offset. */ | |
22555 | mac_ptr += *offset_size; | |
757a13d0 | 22556 | |
cf2c3c16 TT |
22557 | /* Vendor opcode descriptions. */ |
22558 | if ((flags & 4) != 0) | |
22559 | { | |
22560 | unsigned int i, count; | |
757a13d0 | 22561 | |
cf2c3c16 TT |
22562 | count = read_1_byte (abfd, mac_ptr); |
22563 | ++mac_ptr; | |
22564 | for (i = 0; i < count; ++i) | |
22565 | { | |
22566 | unsigned int opcode, bytes_read; | |
22567 | unsigned long arg; | |
22568 | ||
22569 | opcode = read_1_byte (abfd, mac_ptr); | |
22570 | ++mac_ptr; | |
22571 | opcode_definitions[opcode] = mac_ptr; | |
22572 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22573 | mac_ptr += bytes_read; | |
22574 | mac_ptr += arg; | |
22575 | } | |
757a13d0 | 22576 | } |
cf2c3c16 | 22577 | } |
757a13d0 | 22578 | |
cf2c3c16 TT |
22579 | return mac_ptr; |
22580 | } | |
757a13d0 | 22581 | |
cf2c3c16 | 22582 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 22583 | including DW_MACRO_import. */ |
cf2c3c16 TT |
22584 | |
22585 | static void | |
d521ce57 TT |
22586 | dwarf_decode_macro_bytes (bfd *abfd, |
22587 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 22588 | struct macro_source_file *current_file, |
43f3e411 | 22589 | struct line_header *lh, |
cf2c3c16 | 22590 | struct dwarf2_section_info *section, |
36586728 | 22591 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 22592 | unsigned int offset_size, |
8fc3fc34 | 22593 | htab_t include_hash) |
cf2c3c16 | 22594 | { |
4d663531 | 22595 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22596 | enum dwarf_macro_record_type macinfo_type; |
22597 | int at_commandline; | |
d521ce57 | 22598 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22599 | |
cf2c3c16 TT |
22600 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22601 | &offset_size, section_is_gnu); | |
22602 | if (mac_ptr == NULL) | |
22603 | { | |
22604 | /* We already issued a complaint. */ | |
22605 | return; | |
22606 | } | |
757a13d0 JK |
22607 | |
22608 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22609 | GDB is still reading the definitions from command line. First | |
22610 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22611 | to create CURRENT_FILE for the main source holding also the command line | |
22612 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22613 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22614 | ||
22615 | at_commandline = 1; | |
22616 | ||
22617 | do | |
22618 | { | |
22619 | /* Do we at least have room for a macinfo type byte? */ | |
22620 | if (mac_ptr >= mac_end) | |
22621 | { | |
f664829e | 22622 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22623 | break; |
22624 | } | |
22625 | ||
aead7601 | 22626 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22627 | mac_ptr++; |
22628 | ||
cf2c3c16 TT |
22629 | /* Note that we rely on the fact that the corresponding GNU and |
22630 | DWARF constants are the same. */ | |
757a13d0 JK |
22631 | switch (macinfo_type) |
22632 | { | |
22633 | /* A zero macinfo type indicates the end of the macro | |
22634 | information. */ | |
22635 | case 0: | |
22636 | break; | |
2e276125 | 22637 | |
0af92d60 JK |
22638 | case DW_MACRO_define: |
22639 | case DW_MACRO_undef: | |
22640 | case DW_MACRO_define_strp: | |
22641 | case DW_MACRO_undef_strp: | |
22642 | case DW_MACRO_define_sup: | |
22643 | case DW_MACRO_undef_sup: | |
2e276125 | 22644 | { |
891d2f0b | 22645 | unsigned int bytes_read; |
2e276125 | 22646 | int line; |
d521ce57 | 22647 | const char *body; |
cf2c3c16 | 22648 | int is_define; |
2e276125 | 22649 | |
cf2c3c16 TT |
22650 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22651 | mac_ptr += bytes_read; | |
22652 | ||
0af92d60 JK |
22653 | if (macinfo_type == DW_MACRO_define |
22654 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22655 | { |
22656 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22657 | mac_ptr += bytes_read; | |
22658 | } | |
22659 | else | |
22660 | { | |
22661 | LONGEST str_offset; | |
22662 | ||
22663 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22664 | mac_ptr += offset_size; | |
2e276125 | 22665 | |
0af92d60 JK |
22666 | if (macinfo_type == DW_MACRO_define_sup |
22667 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22668 | || section_is_dwz) |
36586728 TT |
22669 | { |
22670 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22671 | ||
22672 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
22673 | } | |
22674 | else | |
22675 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
22676 | } |
22677 | ||
0af92d60 JK |
22678 | is_define = (macinfo_type == DW_MACRO_define |
22679 | || macinfo_type == DW_MACRO_define_strp | |
22680 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 22681 | if (! current_file) |
757a13d0 JK |
22682 | { |
22683 | /* DWARF violation as no main source is present. */ | |
22684 | complaint (&symfile_complaints, | |
22685 | _("debug info with no main source gives macro %s " | |
22686 | "on line %d: %s"), | |
cf2c3c16 TT |
22687 | is_define ? _("definition") : _("undefinition"), |
22688 | line, body); | |
757a13d0 JK |
22689 | break; |
22690 | } | |
3e43a32a MS |
22691 | if ((line == 0 && !at_commandline) |
22692 | || (line != 0 && at_commandline)) | |
4d3c2250 | 22693 | complaint (&symfile_complaints, |
757a13d0 JK |
22694 | _("debug info gives %s macro %s with %s line %d: %s"), |
22695 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 22696 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
22697 | line == 0 ? _("zero") : _("non-zero"), line, body); |
22698 | ||
cf2c3c16 | 22699 | if (is_define) |
757a13d0 | 22700 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
22701 | else |
22702 | { | |
0af92d60 JK |
22703 | gdb_assert (macinfo_type == DW_MACRO_undef |
22704 | || macinfo_type == DW_MACRO_undef_strp | |
22705 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
22706 | macro_undef (current_file, line, body); |
22707 | } | |
2e276125 JB |
22708 | } |
22709 | break; | |
22710 | ||
0af92d60 | 22711 | case DW_MACRO_start_file: |
2e276125 | 22712 | { |
891d2f0b | 22713 | unsigned int bytes_read; |
2e276125 JB |
22714 | int line, file; |
22715 | ||
22716 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22717 | mac_ptr += bytes_read; | |
22718 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22719 | mac_ptr += bytes_read; | |
22720 | ||
3e43a32a MS |
22721 | if ((line == 0 && !at_commandline) |
22722 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
22723 | complaint (&symfile_complaints, |
22724 | _("debug info gives source %d included " | |
22725 | "from %s at %s line %d"), | |
22726 | file, at_commandline ? _("command-line") : _("file"), | |
22727 | line == 0 ? _("zero") : _("non-zero"), line); | |
22728 | ||
22729 | if (at_commandline) | |
22730 | { | |
0af92d60 | 22731 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 22732 | pass one. */ |
757a13d0 JK |
22733 | at_commandline = 0; |
22734 | } | |
22735 | else | |
43f3e411 | 22736 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
22737 | } |
22738 | break; | |
22739 | ||
0af92d60 | 22740 | case DW_MACRO_end_file: |
2e276125 | 22741 | if (! current_file) |
4d3c2250 | 22742 | complaint (&symfile_complaints, |
3e43a32a MS |
22743 | _("macro debug info has an unmatched " |
22744 | "`close_file' directive")); | |
2e276125 JB |
22745 | else |
22746 | { | |
22747 | current_file = current_file->included_by; | |
22748 | if (! current_file) | |
22749 | { | |
cf2c3c16 | 22750 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
22751 | |
22752 | /* GCC circa March 2002 doesn't produce the zero | |
22753 | type byte marking the end of the compilation | |
22754 | unit. Complain if it's not there, but exit no | |
22755 | matter what. */ | |
22756 | ||
22757 | /* Do we at least have room for a macinfo type byte? */ | |
22758 | if (mac_ptr >= mac_end) | |
22759 | { | |
f664829e | 22760 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
22761 | return; |
22762 | } | |
22763 | ||
22764 | /* We don't increment mac_ptr here, so this is just | |
22765 | a look-ahead. */ | |
aead7601 SM |
22766 | next_type |
22767 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
22768 | mac_ptr); | |
2e276125 | 22769 | if (next_type != 0) |
4d3c2250 | 22770 | complaint (&symfile_complaints, |
3e43a32a MS |
22771 | _("no terminating 0-type entry for " |
22772 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
22773 | |
22774 | return; | |
22775 | } | |
22776 | } | |
22777 | break; | |
22778 | ||
0af92d60 JK |
22779 | case DW_MACRO_import: |
22780 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
22781 | { |
22782 | LONGEST offset; | |
8fc3fc34 | 22783 | void **slot; |
a036ba48 TT |
22784 | bfd *include_bfd = abfd; |
22785 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 22786 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 22787 | int is_dwz = section_is_dwz; |
d521ce57 | 22788 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
22789 | |
22790 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22791 | mac_ptr += offset_size; | |
22792 | ||
0af92d60 | 22793 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
22794 | { |
22795 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22796 | ||
4d663531 | 22797 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 22798 | |
a036ba48 | 22799 | include_section = &dwz->macro; |
a32a8923 | 22800 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
22801 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
22802 | is_dwz = 1; | |
22803 | } | |
22804 | ||
22805 | new_mac_ptr = include_section->buffer + offset; | |
22806 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
22807 | ||
8fc3fc34 TT |
22808 | if (*slot != NULL) |
22809 | { | |
22810 | /* This has actually happened; see | |
22811 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
22812 | complaint (&symfile_complaints, | |
0af92d60 | 22813 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
22814 | ".debug_macro section")); |
22815 | } | |
22816 | else | |
22817 | { | |
d521ce57 | 22818 | *slot = (void *) new_mac_ptr; |
36586728 | 22819 | |
a036ba48 | 22820 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 22821 | include_mac_end, current_file, lh, |
36586728 | 22822 | section, section_is_gnu, is_dwz, |
4d663531 | 22823 | offset_size, include_hash); |
8fc3fc34 | 22824 | |
d521ce57 | 22825 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 22826 | } |
cf2c3c16 TT |
22827 | } |
22828 | break; | |
22829 | ||
2e276125 | 22830 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
22831 | if (!section_is_gnu) |
22832 | { | |
22833 | unsigned int bytes_read; | |
2e276125 | 22834 | |
ac298888 TT |
22835 | /* This reads the constant, but since we don't recognize |
22836 | any vendor extensions, we ignore it. */ | |
22837 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
22838 | mac_ptr += bytes_read; |
22839 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22840 | mac_ptr += bytes_read; | |
2e276125 | 22841 | |
cf2c3c16 TT |
22842 | /* We don't recognize any vendor extensions. */ |
22843 | break; | |
22844 | } | |
22845 | /* FALLTHROUGH */ | |
22846 | ||
22847 | default: | |
22848 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22849 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22850 | section); |
22851 | if (mac_ptr == NULL) | |
22852 | return; | |
22853 | break; | |
2e276125 | 22854 | } |
757a13d0 | 22855 | } while (macinfo_type != 0); |
2e276125 | 22856 | } |
8e19ed76 | 22857 | |
cf2c3c16 | 22858 | static void |
09262596 | 22859 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 22860 | int section_is_gnu) |
cf2c3c16 | 22861 | { |
bb5ed363 | 22862 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
22863 | struct line_header *lh = cu->line_header; |
22864 | bfd *abfd; | |
d521ce57 | 22865 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
22866 | struct macro_source_file *current_file = 0; |
22867 | enum dwarf_macro_record_type macinfo_type; | |
22868 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 22869 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 22870 | void **slot; |
09262596 DE |
22871 | struct dwarf2_section_info *section; |
22872 | const char *section_name; | |
22873 | ||
22874 | if (cu->dwo_unit != NULL) | |
22875 | { | |
22876 | if (section_is_gnu) | |
22877 | { | |
22878 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
22879 | section_name = ".debug_macro.dwo"; | |
22880 | } | |
22881 | else | |
22882 | { | |
22883 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
22884 | section_name = ".debug_macinfo.dwo"; | |
22885 | } | |
22886 | } | |
22887 | else | |
22888 | { | |
22889 | if (section_is_gnu) | |
22890 | { | |
22891 | section = &dwarf2_per_objfile->macro; | |
22892 | section_name = ".debug_macro"; | |
22893 | } | |
22894 | else | |
22895 | { | |
22896 | section = &dwarf2_per_objfile->macinfo; | |
22897 | section_name = ".debug_macinfo"; | |
22898 | } | |
22899 | } | |
cf2c3c16 | 22900 | |
bb5ed363 | 22901 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
22902 | if (section->buffer == NULL) |
22903 | { | |
fceca515 | 22904 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
22905 | return; |
22906 | } | |
a32a8923 | 22907 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
22908 | |
22909 | /* First pass: Find the name of the base filename. | |
22910 | This filename is needed in order to process all macros whose definition | |
22911 | (or undefinition) comes from the command line. These macros are defined | |
22912 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
22913 | associated to the base file. | |
22914 | ||
22915 | To determine the base file name, we scan the macro definitions until we | |
22916 | reach the first DW_MACINFO_start_file entry. We then initialize | |
22917 | CURRENT_FILE accordingly so that any macro definition found before the | |
22918 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
22919 | ||
22920 | mac_ptr = section->buffer + offset; | |
22921 | mac_end = section->buffer + section->size; | |
22922 | ||
22923 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
22924 | &offset_size, section_is_gnu); | |
22925 | if (mac_ptr == NULL) | |
22926 | { | |
22927 | /* We already issued a complaint. */ | |
22928 | return; | |
22929 | } | |
22930 | ||
22931 | do | |
22932 | { | |
22933 | /* Do we at least have room for a macinfo type byte? */ | |
22934 | if (mac_ptr >= mac_end) | |
22935 | { | |
22936 | /* Complaint is printed during the second pass as GDB will probably | |
22937 | stop the first pass earlier upon finding | |
22938 | DW_MACINFO_start_file. */ | |
22939 | break; | |
22940 | } | |
22941 | ||
aead7601 | 22942 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
22943 | mac_ptr++; |
22944 | ||
22945 | /* Note that we rely on the fact that the corresponding GNU and | |
22946 | DWARF constants are the same. */ | |
22947 | switch (macinfo_type) | |
22948 | { | |
22949 | /* A zero macinfo type indicates the end of the macro | |
22950 | information. */ | |
22951 | case 0: | |
22952 | break; | |
22953 | ||
0af92d60 JK |
22954 | case DW_MACRO_define: |
22955 | case DW_MACRO_undef: | |
cf2c3c16 TT |
22956 | /* Only skip the data by MAC_PTR. */ |
22957 | { | |
22958 | unsigned int bytes_read; | |
22959 | ||
22960 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22961 | mac_ptr += bytes_read; | |
22962 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22963 | mac_ptr += bytes_read; | |
22964 | } | |
22965 | break; | |
22966 | ||
0af92d60 | 22967 | case DW_MACRO_start_file: |
cf2c3c16 TT |
22968 | { |
22969 | unsigned int bytes_read; | |
22970 | int line, file; | |
22971 | ||
22972 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22973 | mac_ptr += bytes_read; | |
22974 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22975 | mac_ptr += bytes_read; | |
22976 | ||
43f3e411 | 22977 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
22978 | } |
22979 | break; | |
22980 | ||
0af92d60 | 22981 | case DW_MACRO_end_file: |
cf2c3c16 TT |
22982 | /* No data to skip by MAC_PTR. */ |
22983 | break; | |
22984 | ||
0af92d60 JK |
22985 | case DW_MACRO_define_strp: |
22986 | case DW_MACRO_undef_strp: | |
22987 | case DW_MACRO_define_sup: | |
22988 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
22989 | { |
22990 | unsigned int bytes_read; | |
22991 | ||
22992 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22993 | mac_ptr += bytes_read; | |
22994 | mac_ptr += offset_size; | |
22995 | } | |
22996 | break; | |
22997 | ||
0af92d60 JK |
22998 | case DW_MACRO_import: |
22999 | case DW_MACRO_import_sup: | |
cf2c3c16 | 23000 | /* Note that, according to the spec, a transparent include |
0af92d60 | 23001 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
23002 | skip this opcode. */ |
23003 | mac_ptr += offset_size; | |
23004 | break; | |
23005 | ||
23006 | case DW_MACINFO_vendor_ext: | |
23007 | /* Only skip the data by MAC_PTR. */ | |
23008 | if (!section_is_gnu) | |
23009 | { | |
23010 | unsigned int bytes_read; | |
23011 | ||
23012 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23013 | mac_ptr += bytes_read; | |
23014 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23015 | mac_ptr += bytes_read; | |
23016 | } | |
23017 | /* FALLTHROUGH */ | |
23018 | ||
23019 | default: | |
23020 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23021 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23022 | section); |
23023 | if (mac_ptr == NULL) | |
23024 | return; | |
23025 | break; | |
23026 | } | |
23027 | } while (macinfo_type != 0 && current_file == NULL); | |
23028 | ||
23029 | /* Second pass: Process all entries. | |
23030 | ||
23031 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
23032 | command-line macro definitions/undefinitions. This flag is unset when we | |
23033 | reach the first DW_MACINFO_start_file entry. */ | |
23034 | ||
fc4007c9 TT |
23035 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
23036 | htab_eq_pointer, | |
23037 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 23038 | mac_ptr = section->buffer + offset; |
fc4007c9 | 23039 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 23040 | *slot = (void *) mac_ptr; |
8fc3fc34 | 23041 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 23042 | current_file, lh, section, |
fc4007c9 TT |
23043 | section_is_gnu, 0, offset_size, |
23044 | include_hash.get ()); | |
cf2c3c16 TT |
23045 | } |
23046 | ||
8e19ed76 | 23047 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 23048 | if so return true else false. */ |
380bca97 | 23049 | |
8e19ed76 | 23050 | static int |
6e5a29e1 | 23051 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
23052 | { |
23053 | return (attr == NULL ? 0 : | |
23054 | attr->form == DW_FORM_block1 | |
23055 | || attr->form == DW_FORM_block2 | |
23056 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
23057 | || attr->form == DW_FORM_block |
23058 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 23059 | } |
4c2df51b | 23060 | |
c6a0999f JB |
23061 | /* Return non-zero if ATTR's value is a section offset --- classes |
23062 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
23063 | You may use DW_UNSND (attr) to retrieve such offsets. | |
23064 | ||
23065 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
23066 | may have a value that belongs to more than one of these classes; it | |
23067 | would be ambiguous if we did, because we use the same forms for all | |
23068 | of them. */ | |
380bca97 | 23069 | |
3690dd37 | 23070 | static int |
6e5a29e1 | 23071 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
23072 | { |
23073 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
23074 | || attr->form == DW_FORM_data8 |
23075 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
23076 | } |
23077 | ||
3690dd37 JB |
23078 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
23079 | zero otherwise. When this function returns true, you can apply | |
23080 | dwarf2_get_attr_constant_value to it. | |
23081 | ||
23082 | However, note that for some attributes you must check | |
23083 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
23084 | and DW_FORM_data8 are members of both the constant class, and of | |
23085 | the classes that contain offsets into other debug sections | |
23086 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
23087 | that, if an attribute's can be either a constant or one of the | |
23088 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
23089 | taken as section offsets, not constants. |
23090 | ||
23091 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
23092 | cannot handle that. */ | |
380bca97 | 23093 | |
3690dd37 | 23094 | static int |
6e5a29e1 | 23095 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
23096 | { |
23097 | switch (attr->form) | |
23098 | { | |
23099 | case DW_FORM_sdata: | |
23100 | case DW_FORM_udata: | |
23101 | case DW_FORM_data1: | |
23102 | case DW_FORM_data2: | |
23103 | case DW_FORM_data4: | |
23104 | case DW_FORM_data8: | |
663c44ac | 23105 | case DW_FORM_implicit_const: |
3690dd37 JB |
23106 | return 1; |
23107 | default: | |
23108 | return 0; | |
23109 | } | |
23110 | } | |
23111 | ||
7771576e SA |
23112 | |
23113 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
23114 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
23115 | ||
23116 | static int | |
6e5a29e1 | 23117 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
23118 | { |
23119 | switch (attr->form) | |
23120 | { | |
23121 | case DW_FORM_ref_addr: | |
23122 | case DW_FORM_ref1: | |
23123 | case DW_FORM_ref2: | |
23124 | case DW_FORM_ref4: | |
23125 | case DW_FORM_ref8: | |
23126 | case DW_FORM_ref_udata: | |
23127 | case DW_FORM_GNU_ref_alt: | |
23128 | return 1; | |
23129 | default: | |
23130 | return 0; | |
23131 | } | |
23132 | } | |
23133 | ||
3019eac3 DE |
23134 | /* Return the .debug_loc section to use for CU. |
23135 | For DWO files use .debug_loc.dwo. */ | |
23136 | ||
23137 | static struct dwarf2_section_info * | |
23138 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23139 | { | |
23140 | if (cu->dwo_unit) | |
43988095 JK |
23141 | { |
23142 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
23143 | ||
23144 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
23145 | } | |
23146 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23147 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23148 | } |
23149 | ||
8cf6f0b1 TT |
23150 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23151 | ||
23152 | static void | |
23153 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23154 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23155 | const struct attribute *attr) |
8cf6f0b1 | 23156 | { |
3019eac3 DE |
23157 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23158 | ||
23159 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
23160 | |
23161 | baton->per_cu = cu->per_cu; | |
23162 | gdb_assert (baton->per_cu); | |
23163 | /* We don't know how long the location list is, but make sure we | |
23164 | don't run off the edge of the section. */ | |
3019eac3 DE |
23165 | baton->size = section->size - DW_UNSND (attr); |
23166 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23167 | baton->base_address = cu->base_address; |
f664829e | 23168 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23169 | } |
23170 | ||
4c2df51b | 23171 | static void |
ff39bb5e | 23172 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23173 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23174 | { |
bb5ed363 | 23175 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23176 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23177 | |
3690dd37 | 23178 | if (attr_form_is_section_offset (attr) |
3019eac3 | 23179 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23180 | the section. If so, fall through to the complaint in the |
23181 | other branch. */ | |
3019eac3 | 23182 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 23183 | { |
0d53c4c4 | 23184 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23185 | |
8d749320 | 23186 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23187 | |
8cf6f0b1 | 23188 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23189 | |
d00adf39 | 23190 | if (cu->base_known == 0) |
0d53c4c4 | 23191 | complaint (&symfile_complaints, |
3e43a32a MS |
23192 | _("Location list used without " |
23193 | "specifying the CU base address.")); | |
4c2df51b | 23194 | |
f1e6e072 TT |
23195 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23196 | ? dwarf2_loclist_block_index | |
23197 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
23198 | SYMBOL_LOCATION_BATON (sym) = baton; |
23199 | } | |
23200 | else | |
23201 | { | |
23202 | struct dwarf2_locexpr_baton *baton; | |
23203 | ||
8d749320 | 23204 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
23205 | baton->per_cu = cu->per_cu; |
23206 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
23207 | |
23208 | if (attr_form_is_block (attr)) | |
23209 | { | |
23210 | /* Note that we're just copying the block's data pointer | |
23211 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
23212 | info_buffer for SYM's objfile; right now we never release |
23213 | that buffer, but when we do clean up properly this may | |
23214 | need to change. */ | |
0d53c4c4 DJ |
23215 | baton->size = DW_BLOCK (attr)->size; |
23216 | baton->data = DW_BLOCK (attr)->data; | |
23217 | } | |
23218 | else | |
23219 | { | |
23220 | dwarf2_invalid_attrib_class_complaint ("location description", | |
23221 | SYMBOL_NATURAL_NAME (sym)); | |
23222 | baton->size = 0; | |
0d53c4c4 | 23223 | } |
6e70227d | 23224 | |
f1e6e072 TT |
23225 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23226 | ? dwarf2_locexpr_block_index | |
23227 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
23228 | SYMBOL_LOCATION_BATON (sym) = baton; |
23229 | } | |
4c2df51b | 23230 | } |
6502dd73 | 23231 | |
9aa1f1e3 TT |
23232 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
23233 | came from a separate debuginfo file, then the master objfile is | |
23234 | returned. */ | |
ae0d2f24 UW |
23235 | |
23236 | struct objfile * | |
23237 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
23238 | { | |
9291a0cd | 23239 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
23240 | |
23241 | /* Return the master objfile, so that we can report and look up the | |
23242 | correct file containing this variable. */ | |
23243 | if (objfile->separate_debug_objfile_backlink) | |
23244 | objfile = objfile->separate_debug_objfile_backlink; | |
23245 | ||
23246 | return objfile; | |
23247 | } | |
23248 | ||
96408a79 SA |
23249 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
23250 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
23251 | CU_HEADERP first. */ | |
23252 | ||
23253 | static const struct comp_unit_head * | |
23254 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
23255 | struct dwarf2_per_cu_data *per_cu) | |
23256 | { | |
d521ce57 | 23257 | const gdb_byte *info_ptr; |
96408a79 SA |
23258 | |
23259 | if (per_cu->cu) | |
23260 | return &per_cu->cu->header; | |
23261 | ||
9c541725 | 23262 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
23263 | |
23264 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
23265 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
23266 | rcuh_kind::COMPILE); | |
96408a79 SA |
23267 | |
23268 | return cu_headerp; | |
23269 | } | |
23270 | ||
ae0d2f24 UW |
23271 | /* Return the address size given in the compilation unit header for CU. */ |
23272 | ||
98714339 | 23273 | int |
ae0d2f24 UW |
23274 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
23275 | { | |
96408a79 SA |
23276 | struct comp_unit_head cu_header_local; |
23277 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 23278 | |
96408a79 SA |
23279 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23280 | ||
23281 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
23282 | } |
23283 | ||
9eae7c52 TT |
23284 | /* Return the offset size given in the compilation unit header for CU. */ |
23285 | ||
23286 | int | |
23287 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
23288 | { | |
96408a79 SA |
23289 | struct comp_unit_head cu_header_local; |
23290 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 23291 | |
96408a79 SA |
23292 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23293 | ||
23294 | return cu_headerp->offset_size; | |
23295 | } | |
23296 | ||
23297 | /* See its dwarf2loc.h declaration. */ | |
23298 | ||
23299 | int | |
23300 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
23301 | { | |
23302 | struct comp_unit_head cu_header_local; | |
23303 | const struct comp_unit_head *cu_headerp; | |
23304 | ||
23305 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
23306 | ||
23307 | if (cu_headerp->version == 2) | |
23308 | return cu_headerp->addr_size; | |
23309 | else | |
23310 | return cu_headerp->offset_size; | |
181cebd4 JK |
23311 | } |
23312 | ||
9aa1f1e3 TT |
23313 | /* Return the text offset of the CU. The returned offset comes from |
23314 | this CU's objfile. If this objfile came from a separate debuginfo | |
23315 | file, then the offset may be different from the corresponding | |
23316 | offset in the parent objfile. */ | |
23317 | ||
23318 | CORE_ADDR | |
23319 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
23320 | { | |
bb3fa9d0 | 23321 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
23322 | |
23323 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23324 | } | |
23325 | ||
43988095 JK |
23326 | /* Return DWARF version number of PER_CU. */ |
23327 | ||
23328 | short | |
23329 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
23330 | { | |
23331 | return per_cu->dwarf_version; | |
23332 | } | |
23333 | ||
348e048f DE |
23334 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
23335 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
23336 | |
23337 | static struct dwarf2_per_cu_data * | |
9c541725 | 23338 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 23339 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
23340 | struct objfile *objfile) |
23341 | { | |
23342 | struct dwarf2_per_cu_data *this_cu; | |
23343 | int low, high; | |
36586728 | 23344 | const sect_offset *cu_off; |
ae038cb0 | 23345 | |
ae038cb0 DJ |
23346 | low = 0; |
23347 | high = dwarf2_per_objfile->n_comp_units - 1; | |
23348 | while (high > low) | |
23349 | { | |
36586728 | 23350 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 23351 | int mid = low + (high - low) / 2; |
9a619af0 | 23352 | |
36586728 | 23353 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 23354 | cu_off = &mid_cu->sect_off; |
36586728 | 23355 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 23356 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
23357 | high = mid; |
23358 | else | |
23359 | low = mid + 1; | |
23360 | } | |
23361 | gdb_assert (low == high); | |
36586728 | 23362 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
23363 | cu_off = &this_cu->sect_off; |
23364 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 23365 | { |
36586728 | 23366 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 23367 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
23368 | "offset 0x%x [in module %s]"), |
23369 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 23370 | |
9c541725 PA |
23371 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
23372 | <= sect_off); | |
ae038cb0 DJ |
23373 | return dwarf2_per_objfile->all_comp_units[low-1]; |
23374 | } | |
23375 | else | |
23376 | { | |
23377 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
23378 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
23379 | && sect_off >= this_cu->sect_off + this_cu->length) |
23380 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
23381 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
23382 | return this_cu; |
23383 | } | |
23384 | } | |
23385 | ||
23745b47 | 23386 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 23387 | |
9816fde3 | 23388 | static void |
23745b47 | 23389 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 23390 | { |
9816fde3 | 23391 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
23392 | per_cu->cu = cu; |
23393 | cu->per_cu = per_cu; | |
23394 | cu->objfile = per_cu->objfile; | |
93311388 | 23395 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
23396 | } |
23397 | ||
23398 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
23399 | ||
23400 | static void | |
95554aad TT |
23401 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
23402 | enum language pretend_language) | |
9816fde3 JK |
23403 | { |
23404 | struct attribute *attr; | |
23405 | ||
23406 | /* Set the language we're debugging. */ | |
23407 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
23408 | if (attr) | |
23409 | set_cu_language (DW_UNSND (attr), cu); | |
23410 | else | |
9cded63f | 23411 | { |
95554aad | 23412 | cu->language = pretend_language; |
9cded63f TT |
23413 | cu->language_defn = language_def (cu->language); |
23414 | } | |
dee91e82 | 23415 | |
7d45c7c3 | 23416 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
23417 | } |
23418 | ||
ae038cb0 DJ |
23419 | /* Release one cached compilation unit, CU. We unlink it from the tree |
23420 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
23421 | the caller is responsible for that. |
23422 | NOTE: DATA is a void * because this function is also used as a | |
23423 | cleanup routine. */ | |
ae038cb0 DJ |
23424 | |
23425 | static void | |
68dc6402 | 23426 | free_heap_comp_unit (void *data) |
ae038cb0 | 23427 | { |
9a3c8263 | 23428 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 23429 | |
23745b47 DE |
23430 | gdb_assert (cu->per_cu != NULL); |
23431 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
23432 | cu->per_cu = NULL; |
23433 | ||
23434 | obstack_free (&cu->comp_unit_obstack, NULL); | |
23435 | ||
23436 | xfree (cu); | |
23437 | } | |
23438 | ||
72bf9492 | 23439 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 23440 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 23441 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
23442 | |
23443 | static void | |
23444 | free_stack_comp_unit (void *data) | |
23445 | { | |
9a3c8263 | 23446 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 23447 | |
23745b47 DE |
23448 | gdb_assert (cu->per_cu != NULL); |
23449 | cu->per_cu->cu = NULL; | |
23450 | cu->per_cu = NULL; | |
23451 | ||
72bf9492 DJ |
23452 | obstack_free (&cu->comp_unit_obstack, NULL); |
23453 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
23454 | } |
23455 | ||
23456 | /* Free all cached compilation units. */ | |
23457 | ||
23458 | static void | |
23459 | free_cached_comp_units (void *data) | |
23460 | { | |
330cdd98 | 23461 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
23462 | } |
23463 | ||
23464 | /* Increase the age counter on each cached compilation unit, and free | |
23465 | any that are too old. */ | |
23466 | ||
23467 | static void | |
23468 | age_cached_comp_units (void) | |
23469 | { | |
23470 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23471 | ||
23472 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
23473 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23474 | while (per_cu != NULL) | |
23475 | { | |
23476 | per_cu->cu->last_used ++; | |
b4f54984 | 23477 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
23478 | dwarf2_mark (per_cu->cu); |
23479 | per_cu = per_cu->cu->read_in_chain; | |
23480 | } | |
23481 | ||
23482 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23483 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23484 | while (per_cu != NULL) | |
23485 | { | |
23486 | struct dwarf2_per_cu_data *next_cu; | |
23487 | ||
23488 | next_cu = per_cu->cu->read_in_chain; | |
23489 | ||
23490 | if (!per_cu->cu->mark) | |
23491 | { | |
68dc6402 | 23492 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
23493 | *last_chain = next_cu; |
23494 | } | |
23495 | else | |
23496 | last_chain = &per_cu->cu->read_in_chain; | |
23497 | ||
23498 | per_cu = next_cu; | |
23499 | } | |
23500 | } | |
23501 | ||
23502 | /* Remove a single compilation unit from the cache. */ | |
23503 | ||
23504 | static void | |
dee91e82 | 23505 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
23506 | { |
23507 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23508 | ||
23509 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23510 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23511 | while (per_cu != NULL) | |
23512 | { | |
23513 | struct dwarf2_per_cu_data *next_cu; | |
23514 | ||
23515 | next_cu = per_cu->cu->read_in_chain; | |
23516 | ||
dee91e82 | 23517 | if (per_cu == target_per_cu) |
ae038cb0 | 23518 | { |
68dc6402 | 23519 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 23520 | per_cu->cu = NULL; |
ae038cb0 DJ |
23521 | *last_chain = next_cu; |
23522 | break; | |
23523 | } | |
23524 | else | |
23525 | last_chain = &per_cu->cu->read_in_chain; | |
23526 | ||
23527 | per_cu = next_cu; | |
23528 | } | |
23529 | } | |
23530 | ||
fe3e1990 DJ |
23531 | /* Release all extra memory associated with OBJFILE. */ |
23532 | ||
23533 | void | |
23534 | dwarf2_free_objfile (struct objfile *objfile) | |
23535 | { | |
9a3c8263 SM |
23536 | dwarf2_per_objfile |
23537 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23538 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
23539 | |
23540 | if (dwarf2_per_objfile == NULL) | |
23541 | return; | |
23542 | ||
330cdd98 | 23543 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
23544 | } |
23545 | ||
dee91e82 DE |
23546 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23547 | We store these in a hash table separate from the DIEs, and preserve them | |
23548 | when the DIEs are flushed out of cache. | |
23549 | ||
23550 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23551 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23552 | or the type may come from a DWO file. Furthermore, while it's more logical |
23553 | to use per_cu->section+offset, with Fission the section with the data is in | |
23554 | the DWO file but we don't know that section at the point we need it. | |
23555 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23556 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23557 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23558 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23559 | |
dee91e82 | 23560 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23561 | { |
dee91e82 | 23562 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23563 | sect_offset sect_off; |
1c379e20 DJ |
23564 | struct type *type; |
23565 | }; | |
23566 | ||
dee91e82 | 23567 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23568 | |
23569 | static hashval_t | |
dee91e82 | 23570 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23571 | { |
9a3c8263 SM |
23572 | const struct dwarf2_per_cu_offset_and_type *ofs |
23573 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23574 | |
9c541725 | 23575 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23576 | } |
23577 | ||
dee91e82 | 23578 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23579 | |
23580 | static int | |
dee91e82 | 23581 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23582 | { |
9a3c8263 SM |
23583 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23584 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23585 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23586 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23587 | |
dee91e82 | 23588 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23589 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23590 | } |
23591 | ||
23592 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23593 | table if necessary. For convenience, return TYPE. |
23594 | ||
23595 | The DIEs reading must have careful ordering to: | |
23596 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23597 | reading current DIE. | |
23598 | * Not trying to dereference contents of still incompletely read in types | |
23599 | while reading in other DIEs. | |
23600 | * Enable referencing still incompletely read in types just by a pointer to | |
23601 | the type without accessing its fields. | |
23602 | ||
23603 | Therefore caller should follow these rules: | |
23604 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23605 | before building the type and calling set_die_type. | |
e71ec853 | 23606 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23607 | possible before fetching more types to complete the current type. |
23608 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23609 | |
f792889a | 23610 | static struct type * |
1c379e20 DJ |
23611 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23612 | { | |
dee91e82 | 23613 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23614 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23615 | struct attribute *attr; |
23616 | struct dynamic_prop prop; | |
1c379e20 | 23617 | |
b4ba55a1 JB |
23618 | /* For Ada types, make sure that the gnat-specific data is always |
23619 | initialized (if not already set). There are a few types where | |
23620 | we should not be doing so, because the type-specific area is | |
23621 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23622 | where the type-specific area is used to store the floatformat). | |
23623 | But this is not a problem, because the gnat-specific information | |
23624 | is actually not needed for these types. */ | |
23625 | if (need_gnat_info (cu) | |
23626 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23627 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23628 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23629 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23630 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23631 | && !HAVE_GNAT_AUX_INFO (type)) |
23632 | INIT_GNAT_SPECIFIC (type); | |
23633 | ||
3f2f83dd KB |
23634 | /* Read DW_AT_allocated and set in type. */ |
23635 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23636 | if (attr_form_is_block (attr)) | |
23637 | { | |
23638 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23639 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23640 | } | |
23641 | else if (attr != NULL) | |
23642 | { | |
23643 | complaint (&symfile_complaints, | |
9c541725 PA |
23644 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23645 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23646 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23647 | } |
23648 | ||
23649 | /* Read DW_AT_associated and set in type. */ | |
23650 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23651 | if (attr_form_is_block (attr)) | |
23652 | { | |
23653 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23654 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23655 | } | |
23656 | else if (attr != NULL) | |
23657 | { | |
23658 | complaint (&symfile_complaints, | |
9c541725 PA |
23659 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23660 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23661 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23662 | } |
23663 | ||
3cdcd0ce JB |
23664 | /* Read DW_AT_data_location and set in type. */ |
23665 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23666 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23667 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23668 | |
dee91e82 | 23669 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23670 | { |
dee91e82 DE |
23671 | dwarf2_per_objfile->die_type_hash = |
23672 | htab_create_alloc_ex (127, | |
23673 | per_cu_offset_and_type_hash, | |
23674 | per_cu_offset_and_type_eq, | |
23675 | NULL, | |
23676 | &objfile->objfile_obstack, | |
23677 | hashtab_obstack_allocate, | |
23678 | dummy_obstack_deallocate); | |
f792889a | 23679 | } |
1c379e20 | 23680 | |
dee91e82 | 23681 | ofs.per_cu = cu->per_cu; |
9c541725 | 23682 | ofs.sect_off = die->sect_off; |
1c379e20 | 23683 | ofs.type = type; |
dee91e82 DE |
23684 | slot = (struct dwarf2_per_cu_offset_and_type **) |
23685 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
23686 | if (*slot) |
23687 | complaint (&symfile_complaints, | |
23688 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 23689 | to_underlying (die->sect_off)); |
8d749320 SM |
23690 | *slot = XOBNEW (&objfile->objfile_obstack, |
23691 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23692 | **slot = ofs; |
f792889a | 23693 | return type; |
1c379e20 DJ |
23694 | } |
23695 | ||
9c541725 | 23696 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23697 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23698 | |
23699 | static struct type * | |
9c541725 | 23700 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23701 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23702 | { |
dee91e82 | 23703 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 23704 | |
dee91e82 | 23705 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23706 | return NULL; |
1c379e20 | 23707 | |
dee91e82 | 23708 | ofs.per_cu = per_cu; |
9c541725 | 23709 | ofs.sect_off = sect_off; |
9a3c8263 SM |
23710 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
23711 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
23712 | if (slot) |
23713 | return slot->type; | |
23714 | else | |
23715 | return NULL; | |
23716 | } | |
23717 | ||
02142a6c | 23718 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23719 | or return NULL if DIE does not have a saved type. */ |
23720 | ||
23721 | static struct type * | |
23722 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
23723 | { | |
9c541725 | 23724 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
23725 | } |
23726 | ||
10b3939b DJ |
23727 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
23728 | ||
23729 | static void | |
23730 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
23731 | struct dwarf2_per_cu_data *ref_per_cu) | |
23732 | { | |
23733 | void **slot; | |
23734 | ||
23735 | if (cu->dependencies == NULL) | |
23736 | cu->dependencies | |
23737 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
23738 | NULL, &cu->comp_unit_obstack, | |
23739 | hashtab_obstack_allocate, | |
23740 | dummy_obstack_deallocate); | |
23741 | ||
23742 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
23743 | if (*slot == NULL) | |
23744 | *slot = ref_per_cu; | |
23745 | } | |
1c379e20 | 23746 | |
f504f079 DE |
23747 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
23748 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
23749 | cache that we must keep because we are keeping CU. */ |
23750 | ||
10b3939b DJ |
23751 | static int |
23752 | dwarf2_mark_helper (void **slot, void *data) | |
23753 | { | |
23754 | struct dwarf2_per_cu_data *per_cu; | |
23755 | ||
23756 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
23757 | |
23758 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
23759 | reading of the chain. As such dependencies remain valid it is not much | |
23760 | useful to track and undo them during QUIT cleanups. */ | |
23761 | if (per_cu->cu == NULL) | |
23762 | return 1; | |
23763 | ||
10b3939b DJ |
23764 | if (per_cu->cu->mark) |
23765 | return 1; | |
23766 | per_cu->cu->mark = 1; | |
23767 | ||
23768 | if (per_cu->cu->dependencies != NULL) | |
23769 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
23770 | ||
23771 | return 1; | |
23772 | } | |
23773 | ||
f504f079 DE |
23774 | /* Set the mark field in CU and in every other compilation unit in the |
23775 | cache that we must keep because we are keeping CU. */ | |
23776 | ||
ae038cb0 DJ |
23777 | static void |
23778 | dwarf2_mark (struct dwarf2_cu *cu) | |
23779 | { | |
23780 | if (cu->mark) | |
23781 | return; | |
23782 | cu->mark = 1; | |
10b3939b DJ |
23783 | if (cu->dependencies != NULL) |
23784 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
23785 | } |
23786 | ||
23787 | static void | |
23788 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
23789 | { | |
23790 | while (per_cu) | |
23791 | { | |
23792 | per_cu->cu->mark = 0; | |
23793 | per_cu = per_cu->cu->read_in_chain; | |
23794 | } | |
72bf9492 DJ |
23795 | } |
23796 | ||
72bf9492 DJ |
23797 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
23798 | is its offset in .debug_info for this objfile. */ | |
23799 | ||
23800 | static hashval_t | |
23801 | partial_die_hash (const void *item) | |
23802 | { | |
9a3c8263 SM |
23803 | const struct partial_die_info *part_die |
23804 | = (const struct partial_die_info *) item; | |
9a619af0 | 23805 | |
9c541725 | 23806 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
23807 | } |
23808 | ||
23809 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
23810 | are equal if they have the same offset. */ | |
23811 | ||
23812 | static int | |
23813 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
23814 | { | |
9a3c8263 SM |
23815 | const struct partial_die_info *part_die_lhs |
23816 | = (const struct partial_die_info *) item_lhs; | |
23817 | const struct partial_die_info *part_die_rhs | |
23818 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 23819 | |
9c541725 | 23820 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
23821 | } |
23822 | ||
b4f54984 DE |
23823 | static struct cmd_list_element *set_dwarf_cmdlist; |
23824 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
23825 | |
23826 | static void | |
981a3fb3 | 23827 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 23828 | { |
b4f54984 | 23829 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 23830 | gdb_stdout); |
ae038cb0 DJ |
23831 | } |
23832 | ||
23833 | static void | |
981a3fb3 | 23834 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 23835 | { |
b4f54984 | 23836 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
23837 | } |
23838 | ||
4bf44c1c | 23839 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
23840 | |
23841 | static void | |
c1bd65d0 | 23842 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 23843 | { |
9a3c8263 | 23844 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 23845 | int ix; |
8b70b953 | 23846 | |
626f2d1c TT |
23847 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
23848 | cleaning up. */ | |
23849 | dwarf2_per_objfile = NULL; | |
23850 | ||
59b0c7c1 JB |
23851 | for (ix = 0; ix < data->n_comp_units; ++ix) |
23852 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 23853 | |
59b0c7c1 | 23854 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 23855 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
23856 | data->all_type_units[ix]->per_cu.imported_symtabs); |
23857 | xfree (data->all_type_units); | |
95554aad | 23858 | |
8b70b953 | 23859 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
23860 | |
23861 | if (data->dwo_files) | |
23862 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
23863 | if (data->dwp_file) |
23864 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
23865 | |
23866 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
23867 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
3f563c84 PA |
23868 | |
23869 | if (data->index_table != NULL) | |
23870 | data->index_table->~mapped_index (); | |
9291a0cd TT |
23871 | } |
23872 | ||
23873 | \f | |
ae2de4f8 | 23874 | /* The "save gdb-index" command. */ |
9291a0cd | 23875 | |
bc8f2430 JK |
23876 | /* In-memory buffer to prepare data to be written later to a file. */ |
23877 | class data_buf | |
9291a0cd | 23878 | { |
bc8f2430 | 23879 | public: |
bc8f2430 JK |
23880 | /* Copy DATA to the end of the buffer. */ |
23881 | template<typename T> | |
23882 | void append_data (const T &data) | |
23883 | { | |
23884 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
23885 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 23886 | grow (sizeof (data))); |
bc8f2430 | 23887 | } |
b89be57b | 23888 | |
c2f134ac PA |
23889 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
23890 | terminating zero is appended too. */ | |
bc8f2430 JK |
23891 | void append_cstr0 (const char *cstr) |
23892 | { | |
23893 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
23894 | std::copy (cstr, cstr + size, grow (size)); |
23895 | } | |
23896 | ||
23897 | /* Accept a host-format integer in VAL and append it to the buffer | |
23898 | as a target-format integer which is LEN bytes long. */ | |
23899 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
23900 | { | |
23901 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 23902 | } |
9291a0cd | 23903 | |
bc8f2430 JK |
23904 | /* Return the size of the buffer. */ |
23905 | size_t size () const | |
23906 | { | |
23907 | return m_vec.size (); | |
23908 | } | |
23909 | ||
23910 | /* Write the buffer to FILE. */ | |
23911 | void file_write (FILE *file) const | |
23912 | { | |
a81e6d4d PA |
23913 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
23914 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
23915 | } |
23916 | ||
23917 | private: | |
c2f134ac PA |
23918 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
23919 | the start of the new block. */ | |
23920 | gdb_byte *grow (size_t size) | |
23921 | { | |
23922 | m_vec.resize (m_vec.size () + size); | |
23923 | return &*m_vec.end () - size; | |
23924 | } | |
23925 | ||
d5722aa2 | 23926 | gdb::byte_vector m_vec; |
bc8f2430 | 23927 | }; |
9291a0cd TT |
23928 | |
23929 | /* An entry in the symbol table. */ | |
23930 | struct symtab_index_entry | |
23931 | { | |
23932 | /* The name of the symbol. */ | |
23933 | const char *name; | |
23934 | /* The offset of the name in the constant pool. */ | |
23935 | offset_type index_offset; | |
23936 | /* A sorted vector of the indices of all the CUs that hold an object | |
23937 | of this name. */ | |
bc8f2430 | 23938 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
23939 | }; |
23940 | ||
23941 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
23942 | struct mapped_symtab | |
23943 | { | |
bc8f2430 JK |
23944 | mapped_symtab () |
23945 | { | |
23946 | data.resize (1024); | |
23947 | } | |
b89be57b | 23948 | |
bc8f2430 | 23949 | offset_type n_elements = 0; |
4b76cda9 | 23950 | std::vector<symtab_index_entry> data; |
bc8f2430 | 23951 | }; |
9291a0cd | 23952 | |
bc8f2430 | 23953 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
23954 | the slot. |
23955 | ||
23956 | Function is used only during write_hash_table so no index format backward | |
23957 | compatibility is needed. */ | |
b89be57b | 23958 | |
4b76cda9 | 23959 | static symtab_index_entry & |
9291a0cd TT |
23960 | find_slot (struct mapped_symtab *symtab, const char *name) |
23961 | { | |
559a7a62 | 23962 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 23963 | |
bc8f2430 JK |
23964 | index = hash & (symtab->data.size () - 1); |
23965 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
23966 | |
23967 | for (;;) | |
23968 | { | |
4b76cda9 PA |
23969 | if (symtab->data[index].name == NULL |
23970 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
23971 | return symtab->data[index]; |
23972 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
23973 | } |
23974 | } | |
23975 | ||
23976 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 23977 | |
9291a0cd TT |
23978 | static void |
23979 | hash_expand (struct mapped_symtab *symtab) | |
23980 | { | |
bc8f2430 | 23981 | auto old_entries = std::move (symtab->data); |
9291a0cd | 23982 | |
bc8f2430 JK |
23983 | symtab->data.clear (); |
23984 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 23985 | |
bc8f2430 | 23986 | for (auto &it : old_entries) |
4b76cda9 | 23987 | if (it.name != NULL) |
bc8f2430 | 23988 | { |
4b76cda9 | 23989 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
23990 | ref = std::move (it); |
23991 | } | |
9291a0cd TT |
23992 | } |
23993 | ||
156942c7 DE |
23994 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
23995 | CU_INDEX is the index of the CU in which the symbol appears. | |
23996 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 23997 | |
9291a0cd TT |
23998 | static void |
23999 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 24000 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
24001 | offset_type cu_index) |
24002 | { | |
156942c7 | 24003 | offset_type cu_index_and_attrs; |
9291a0cd TT |
24004 | |
24005 | ++symtab->n_elements; | |
bc8f2430 | 24006 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
24007 | hash_expand (symtab); |
24008 | ||
4b76cda9 PA |
24009 | symtab_index_entry &slot = find_slot (symtab, name); |
24010 | if (slot.name == NULL) | |
9291a0cd | 24011 | { |
4b76cda9 | 24012 | slot.name = name; |
156942c7 | 24013 | /* index_offset is set later. */ |
9291a0cd | 24014 | } |
156942c7 DE |
24015 | |
24016 | cu_index_and_attrs = 0; | |
24017 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
24018 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
24019 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
24020 | ||
24021 | /* We don't want to record an index value twice as we want to avoid the | |
24022 | duplication. | |
24023 | We process all global symbols and then all static symbols | |
24024 | (which would allow us to avoid the duplication by only having to check | |
24025 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
24026 | To keep things simple we don't worry about the duplication here and | |
24027 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 24028 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
24029 | } |
24030 | ||
24031 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
24032 | ||
24033 | static void | |
24034 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
24035 | { | |
4b76cda9 | 24036 | for (auto &entry : symtab->data) |
156942c7 | 24037 | { |
4b76cda9 | 24038 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 24039 | { |
4b76cda9 | 24040 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
24041 | std::sort (cu_indices.begin (), cu_indices.end ()); |
24042 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
24043 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
24044 | } |
24045 | } | |
9291a0cd TT |
24046 | } |
24047 | ||
bc8f2430 JK |
24048 | /* A form of 'const char *' suitable for container keys. Only the |
24049 | pointer is stored. The strings themselves are compared, not the | |
24050 | pointers. */ | |
24051 | class c_str_view | |
9291a0cd | 24052 | { |
bc8f2430 JK |
24053 | public: |
24054 | c_str_view (const char *cstr) | |
24055 | : m_cstr (cstr) | |
24056 | {} | |
9291a0cd | 24057 | |
bc8f2430 JK |
24058 | bool operator== (const c_str_view &other) const |
24059 | { | |
24060 | return strcmp (m_cstr, other.m_cstr) == 0; | |
24061 | } | |
9291a0cd | 24062 | |
bc8f2430 JK |
24063 | private: |
24064 | friend class c_str_view_hasher; | |
24065 | const char *const m_cstr; | |
24066 | }; | |
9291a0cd | 24067 | |
bc8f2430 JK |
24068 | /* A std::unordered_map::hasher for c_str_view that uses the right |
24069 | hash function for strings in a mapped index. */ | |
24070 | class c_str_view_hasher | |
24071 | { | |
24072 | public: | |
24073 | size_t operator () (const c_str_view &x) const | |
24074 | { | |
24075 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
24076 | } | |
24077 | }; | |
b89be57b | 24078 | |
bc8f2430 JK |
24079 | /* A std::unordered_map::hasher for std::vector<>. */ |
24080 | template<typename T> | |
24081 | class vector_hasher | |
9291a0cd | 24082 | { |
bc8f2430 JK |
24083 | public: |
24084 | size_t operator () (const std::vector<T> &key) const | |
24085 | { | |
24086 | return iterative_hash (key.data (), | |
24087 | sizeof (key.front ()) * key.size (), 0); | |
24088 | } | |
24089 | }; | |
9291a0cd | 24090 | |
bc8f2430 JK |
24091 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
24092 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 24093 | |
bc8f2430 JK |
24094 | static void |
24095 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
24096 | { | |
24097 | { | |
24098 | /* Elements are sorted vectors of the indices of all the CUs that | |
24099 | hold an object of this name. */ | |
24100 | std::unordered_map<std::vector<offset_type>, offset_type, | |
24101 | vector_hasher<offset_type>> | |
24102 | symbol_hash_table; | |
24103 | ||
24104 | /* We add all the index vectors to the constant pool first, to | |
24105 | ensure alignment is ok. */ | |
4b76cda9 | 24106 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 24107 | { |
4b76cda9 | 24108 | if (entry.name == NULL) |
bc8f2430 | 24109 | continue; |
4b76cda9 | 24110 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
24111 | |
24112 | /* Finding before inserting is faster than always trying to | |
24113 | insert, because inserting always allocates a node, does the | |
24114 | lookup, and then destroys the new node if another node | |
24115 | already had the same key. C++17 try_emplace will avoid | |
24116 | this. */ | |
24117 | const auto found | |
4b76cda9 | 24118 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
24119 | if (found != symbol_hash_table.end ()) |
24120 | { | |
4b76cda9 | 24121 | entry.index_offset = found->second; |
70a1152b PA |
24122 | continue; |
24123 | } | |
24124 | ||
4b76cda9 PA |
24125 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
24126 | entry.index_offset = cpool.size (); | |
24127 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
24128 | for (const auto index : entry.cu_indices) | |
24129 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
24130 | } |
24131 | } | |
9291a0cd TT |
24132 | |
24133 | /* Now write out the hash table. */ | |
bc8f2430 | 24134 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 24135 | for (const auto &entry : symtab->data) |
9291a0cd TT |
24136 | { |
24137 | offset_type str_off, vec_off; | |
24138 | ||
4b76cda9 | 24139 | if (entry.name != NULL) |
9291a0cd | 24140 | { |
4b76cda9 | 24141 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 24142 | if (insertpair.second) |
4b76cda9 | 24143 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 24144 | str_off = insertpair.first->second; |
4b76cda9 | 24145 | vec_off = entry.index_offset; |
9291a0cd TT |
24146 | } |
24147 | else | |
24148 | { | |
24149 | /* While 0 is a valid constant pool index, it is not valid | |
24150 | to have 0 for both offsets. */ | |
24151 | str_off = 0; | |
24152 | vec_off = 0; | |
24153 | } | |
24154 | ||
bc8f2430 JK |
24155 | output.append_data (MAYBE_SWAP (str_off)); |
24156 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 24157 | } |
9291a0cd TT |
24158 | } |
24159 | ||
bc8f2430 | 24160 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
24161 | |
24162 | /* Helper struct for building the address table. */ | |
24163 | struct addrmap_index_data | |
24164 | { | |
bc8f2430 JK |
24165 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
24166 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
24167 | {} | |
24168 | ||
0a5429f6 | 24169 | struct objfile *objfile; |
bc8f2430 JK |
24170 | data_buf &addr_vec; |
24171 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
24172 | |
24173 | /* Non-zero if the previous_* fields are valid. | |
24174 | We can't write an entry until we see the next entry (since it is only then | |
24175 | that we know the end of the entry). */ | |
24176 | int previous_valid; | |
24177 | /* Index of the CU in the table of all CUs in the index file. */ | |
24178 | unsigned int previous_cu_index; | |
0963b4bd | 24179 | /* Start address of the CU. */ |
0a5429f6 DE |
24180 | CORE_ADDR previous_cu_start; |
24181 | }; | |
24182 | ||
bc8f2430 | 24183 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 24184 | |
9291a0cd | 24185 | static void |
bc8f2430 | 24186 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 24187 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 24188 | { |
9291a0cd TT |
24189 | CORE_ADDR baseaddr; |
24190 | ||
24191 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
24192 | ||
c2f134ac PA |
24193 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
24194 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 24195 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
24196 | } |
24197 | ||
24198 | /* Worker function for traversing an addrmap to build the address table. */ | |
24199 | ||
24200 | static int | |
24201 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
24202 | { | |
9a3c8263 SM |
24203 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
24204 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
24205 | |
24206 | if (data->previous_valid) | |
bc8f2430 | 24207 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
24208 | data->previous_cu_start, start_addr, |
24209 | data->previous_cu_index); | |
24210 | ||
24211 | data->previous_cu_start = start_addr; | |
24212 | if (pst != NULL) | |
24213 | { | |
bc8f2430 JK |
24214 | const auto it = data->cu_index_htab.find (pst); |
24215 | gdb_assert (it != data->cu_index_htab.cend ()); | |
24216 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
24217 | data->previous_valid = 1; |
24218 | } | |
24219 | else | |
bc8f2430 | 24220 | data->previous_valid = 0; |
0a5429f6 DE |
24221 | |
24222 | return 0; | |
24223 | } | |
24224 | ||
bc8f2430 | 24225 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
24226 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
24227 | in the index file. */ | |
24228 | ||
24229 | static void | |
bc8f2430 JK |
24230 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
24231 | psym_index_map &cu_index_htab) | |
0a5429f6 | 24232 | { |
bc8f2430 | 24233 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
24234 | |
24235 | /* When writing the address table, we have to cope with the fact that | |
24236 | the addrmap iterator only provides the start of a region; we have to | |
24237 | wait until the next invocation to get the start of the next region. */ | |
24238 | ||
24239 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
24240 | addrmap_index_data.previous_valid = 0; |
24241 | ||
24242 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
24243 | &addrmap_index_data); | |
24244 | ||
24245 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
24246 | is valid, but we should still handle it. | |
24247 | The end address is recorded as the start of the next region, but that | |
24248 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
24249 | anyway. */ | |
24250 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 24251 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
24252 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
24253 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
24254 | } |
24255 | ||
156942c7 DE |
24256 | /* Return the symbol kind of PSYM. */ |
24257 | ||
24258 | static gdb_index_symbol_kind | |
24259 | symbol_kind (struct partial_symbol *psym) | |
24260 | { | |
24261 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
24262 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
24263 | ||
24264 | switch (domain) | |
24265 | { | |
24266 | case VAR_DOMAIN: | |
24267 | switch (aclass) | |
24268 | { | |
24269 | case LOC_BLOCK: | |
24270 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
24271 | case LOC_TYPEDEF: | |
24272 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24273 | case LOC_COMPUTED: | |
24274 | case LOC_CONST_BYTES: | |
24275 | case LOC_OPTIMIZED_OUT: | |
24276 | case LOC_STATIC: | |
24277 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24278 | case LOC_CONST: | |
24279 | /* Note: It's currently impossible to recognize psyms as enum values | |
24280 | short of reading the type info. For now punt. */ | |
24281 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24282 | default: | |
24283 | /* There are other LOC_FOO values that one might want to classify | |
24284 | as variables, but dwarf2read.c doesn't currently use them. */ | |
24285 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24286 | } | |
24287 | case STRUCT_DOMAIN: | |
24288 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24289 | default: | |
24290 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24291 | } | |
24292 | } | |
24293 | ||
9291a0cd | 24294 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 24295 | |
9291a0cd TT |
24296 | static void |
24297 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 24298 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
24299 | struct partial_symbol **psymp, |
24300 | int count, | |
987d643c TT |
24301 | offset_type cu_index, |
24302 | int is_static) | |
9291a0cd TT |
24303 | { |
24304 | for (; count-- > 0; ++psymp) | |
24305 | { | |
156942c7 | 24306 | struct partial_symbol *psym = *psymp; |
987d643c | 24307 | |
156942c7 | 24308 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 24309 | error (_("Ada is not currently supported by the index")); |
987d643c | 24310 | |
987d643c | 24311 | /* Only add a given psymbol once. */ |
bc8f2430 | 24312 | if (psyms_seen.insert (psym).second) |
987d643c | 24313 | { |
156942c7 DE |
24314 | gdb_index_symbol_kind kind = symbol_kind (psym); |
24315 | ||
156942c7 DE |
24316 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
24317 | is_static, kind, cu_index); | |
987d643c | 24318 | } |
9291a0cd TT |
24319 | } |
24320 | } | |
24321 | ||
1fd400ff TT |
24322 | /* A helper struct used when iterating over debug_types. */ |
24323 | struct signatured_type_index_data | |
24324 | { | |
bc8f2430 JK |
24325 | signatured_type_index_data (data_buf &types_list_, |
24326 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
24327 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
24328 | {} | |
24329 | ||
1fd400ff TT |
24330 | struct objfile *objfile; |
24331 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
24332 | data_buf &types_list; |
24333 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
24334 | int cu_index; |
24335 | }; | |
24336 | ||
24337 | /* A helper function that writes a single signatured_type to an | |
24338 | obstack. */ | |
b89be57b | 24339 | |
1fd400ff TT |
24340 | static int |
24341 | write_one_signatured_type (void **slot, void *d) | |
24342 | { | |
9a3c8263 SM |
24343 | struct signatured_type_index_data *info |
24344 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 24345 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 24346 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
24347 | |
24348 | write_psymbols (info->symtab, | |
987d643c | 24349 | info->psyms_seen, |
af5bf4ad | 24350 | &info->objfile->global_psymbols[psymtab->globals_offset], |
987d643c TT |
24351 | psymtab->n_global_syms, info->cu_index, |
24352 | 0); | |
1fd400ff | 24353 | write_psymbols (info->symtab, |
987d643c | 24354 | info->psyms_seen, |
af5bf4ad | 24355 | &info->objfile->static_psymbols[psymtab->statics_offset], |
987d643c TT |
24356 | psymtab->n_static_syms, info->cu_index, |
24357 | 1); | |
1fd400ff | 24358 | |
c2f134ac PA |
24359 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24360 | to_underlying (entry->per_cu.sect_off)); | |
24361 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
24362 | to_underlying (entry->type_offset_in_tu)); | |
24363 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
24364 | |
24365 | ++info->cu_index; | |
24366 | ||
24367 | return 1; | |
24368 | } | |
24369 | ||
e8f8bcb3 PA |
24370 | /* Recurse into all "included" dependencies and count their symbols as |
24371 | if they appeared in this psymtab. */ | |
24372 | ||
24373 | static void | |
24374 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
24375 | size_t &psyms_seen) | |
24376 | { | |
24377 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
24378 | if (psymtab->dependencies[i]->user != NULL) | |
24379 | recursively_count_psymbols (psymtab->dependencies[i], | |
24380 | psyms_seen); | |
24381 | ||
24382 | psyms_seen += psymtab->n_global_syms; | |
24383 | psyms_seen += psymtab->n_static_syms; | |
24384 | } | |
24385 | ||
95554aad TT |
24386 | /* Recurse into all "included" dependencies and write their symbols as |
24387 | if they appeared in this psymtab. */ | |
24388 | ||
24389 | static void | |
24390 | recursively_write_psymbols (struct objfile *objfile, | |
24391 | struct partial_symtab *psymtab, | |
24392 | struct mapped_symtab *symtab, | |
bc8f2430 | 24393 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
24394 | offset_type cu_index) |
24395 | { | |
24396 | int i; | |
24397 | ||
24398 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
24399 | if (psymtab->dependencies[i]->user != NULL) | |
24400 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
24401 | symtab, psyms_seen, cu_index); | |
24402 | ||
24403 | write_psymbols (symtab, | |
24404 | psyms_seen, | |
af5bf4ad | 24405 | &objfile->global_psymbols[psymtab->globals_offset], |
95554aad TT |
24406 | psymtab->n_global_syms, cu_index, |
24407 | 0); | |
24408 | write_psymbols (symtab, | |
24409 | psyms_seen, | |
af5bf4ad | 24410 | &objfile->static_psymbols[psymtab->statics_offset], |
95554aad TT |
24411 | psymtab->n_static_syms, cu_index, |
24412 | 1); | |
24413 | } | |
24414 | ||
9291a0cd | 24415 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 24416 | |
9291a0cd TT |
24417 | static void |
24418 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
24419 | { | |
9291a0cd TT |
24420 | if (dwarf2_per_objfile->using_index) |
24421 | error (_("Cannot use an index to create the index")); | |
24422 | ||
8b70b953 TT |
24423 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
24424 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
24425 | ||
260b681b DE |
24426 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
24427 | return; | |
24428 | ||
bc8f2430 | 24429 | struct stat st; |
4262abfb JK |
24430 | if (stat (objfile_name (objfile), &st) < 0) |
24431 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 24432 | |
bc8f2430 JK |
24433 | std::string filename (std::string (dir) + SLASH_STRING |
24434 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 24435 | |
d419f42d | 24436 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 24437 | if (!out_file) |
bc8f2430 | 24438 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 24439 | |
16b7a719 PA |
24440 | /* Order matters here; we want FILE to be closed before FILENAME is |
24441 | unlinked, because on MS-Windows one cannot delete a file that is | |
24442 | still open. (Don't call anything here that might throw until | |
24443 | file_closer is created.) */ | |
bc8f2430 | 24444 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 24445 | gdb_file_up close_out_file (out_file); |
9291a0cd | 24446 | |
bc8f2430 JK |
24447 | mapped_symtab symtab; |
24448 | data_buf cu_list; | |
987d643c | 24449 | |
0a5429f6 DE |
24450 | /* While we're scanning CU's create a table that maps a psymtab pointer |
24451 | (which is what addrmap records) to its index (which is what is recorded | |
24452 | in the index file). This will later be needed to write the address | |
24453 | table. */ | |
bc8f2430 JK |
24454 | psym_index_map cu_index_htab; |
24455 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
24456 | |
24457 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
24458 | work here. Also, the debug_types entries do not appear in |
24459 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
24460 | |
24461 | /* The psyms_seen set is potentially going to be largish (~40k | |
24462 | elements when indexing a -g3 build of GDB itself). Estimate the | |
24463 | number of elements in order to avoid too many rehashes, which | |
24464 | require rebuilding buckets and thus many trips to | |
24465 | malloc/free. */ | |
24466 | size_t psyms_count = 0; | |
24467 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24468 | { | |
24469 | struct dwarf2_per_cu_data *per_cu | |
24470 | = dwarf2_per_objfile->all_comp_units[i]; | |
24471 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
24472 | ||
24473 | if (psymtab != NULL && psymtab->user == NULL) | |
24474 | recursively_count_psymbols (psymtab, psyms_count); | |
24475 | } | |
24476 | /* Generating an index for gdb itself shows a ratio of | |
24477 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
24478 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 24479 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 24480 | { |
3e43a32a MS |
24481 | struct dwarf2_per_cu_data *per_cu |
24482 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 24483 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 24484 | |
92fac807 JK |
24485 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
24486 | It may be referenced from a local scope but in such case it does not | |
24487 | need to be present in .gdb_index. */ | |
24488 | if (psymtab == NULL) | |
24489 | continue; | |
24490 | ||
95554aad | 24491 | if (psymtab->user == NULL) |
bc8f2430 JK |
24492 | recursively_write_psymbols (objfile, psymtab, &symtab, |
24493 | psyms_seen, i); | |
9291a0cd | 24494 | |
bc8f2430 JK |
24495 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
24496 | gdb_assert (insertpair.second); | |
9291a0cd | 24497 | |
c2f134ac PA |
24498 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24499 | to_underlying (per_cu->sect_off)); | |
24500 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
24501 | } |
24502 | ||
0a5429f6 | 24503 | /* Dump the address map. */ |
bc8f2430 JK |
24504 | data_buf addr_vec; |
24505 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 24506 | |
1fd400ff | 24507 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 24508 | data_buf types_cu_list; |
1fd400ff TT |
24509 | if (dwarf2_per_objfile->signatured_types) |
24510 | { | |
bc8f2430 JK |
24511 | signatured_type_index_data sig_data (types_cu_list, |
24512 | psyms_seen); | |
1fd400ff TT |
24513 | |
24514 | sig_data.objfile = objfile; | |
bc8f2430 | 24515 | sig_data.symtab = &symtab; |
1fd400ff TT |
24516 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
24517 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
24518 | write_one_signatured_type, &sig_data); | |
24519 | } | |
24520 | ||
156942c7 DE |
24521 | /* Now that we've processed all symbols we can shrink their cu_indices |
24522 | lists. */ | |
bc8f2430 | 24523 | uniquify_cu_indices (&symtab); |
156942c7 | 24524 | |
bc8f2430 JK |
24525 | data_buf symtab_vec, constant_pool; |
24526 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 24527 | |
bc8f2430 JK |
24528 | data_buf contents; |
24529 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
24530 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
24531 | |
24532 | /* The version number. */ | |
bc8f2430 | 24533 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
24534 | |
24535 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
24536 | contents.append_data (MAYBE_SWAP (total_len)); |
24537 | total_len += cu_list.size (); | |
9291a0cd | 24538 | |
1fd400ff | 24539 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
24540 | contents.append_data (MAYBE_SWAP (total_len)); |
24541 | total_len += types_cu_list.size (); | |
1fd400ff | 24542 | |
9291a0cd | 24543 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
24544 | contents.append_data (MAYBE_SWAP (total_len)); |
24545 | total_len += addr_vec.size (); | |
9291a0cd TT |
24546 | |
24547 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
24548 | contents.append_data (MAYBE_SWAP (total_len)); |
24549 | total_len += symtab_vec.size (); | |
9291a0cd TT |
24550 | |
24551 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
24552 | contents.append_data (MAYBE_SWAP (total_len)); |
24553 | total_len += constant_pool.size (); | |
9291a0cd | 24554 | |
bc8f2430 | 24555 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 24556 | |
bc8f2430 JK |
24557 | contents.file_write (out_file); |
24558 | cu_list.file_write (out_file); | |
24559 | types_cu_list.file_write (out_file); | |
24560 | addr_vec.file_write (out_file); | |
24561 | symtab_vec.file_write (out_file); | |
24562 | constant_pool.file_write (out_file); | |
9291a0cd | 24563 | |
bef155c3 TT |
24564 | /* We want to keep the file. */ |
24565 | unlink_file.keep (); | |
9291a0cd TT |
24566 | } |
24567 | ||
90476074 TT |
24568 | /* Implementation of the `save gdb-index' command. |
24569 | ||
24570 | Note that the file format used by this command is documented in the | |
24571 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 24572 | |
9291a0cd | 24573 | static void |
8384c356 | 24574 | save_gdb_index_command (const char *arg, int from_tty) |
9291a0cd TT |
24575 | { |
24576 | struct objfile *objfile; | |
24577 | ||
24578 | if (!arg || !*arg) | |
96d19272 | 24579 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
24580 | |
24581 | ALL_OBJFILES (objfile) | |
24582 | { | |
24583 | struct stat st; | |
24584 | ||
24585 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 24586 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
24587 | continue; |
24588 | ||
9a3c8263 SM |
24589 | dwarf2_per_objfile |
24590 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
24591 | dwarf2_objfile_data_key); | |
9291a0cd TT |
24592 | if (dwarf2_per_objfile) |
24593 | { | |
9291a0cd | 24594 | |
492d29ea | 24595 | TRY |
9291a0cd TT |
24596 | { |
24597 | write_psymtabs_to_index (objfile, arg); | |
24598 | } | |
492d29ea PA |
24599 | CATCH (except, RETURN_MASK_ERROR) |
24600 | { | |
24601 | exception_fprintf (gdb_stderr, except, | |
24602 | _("Error while writing index for `%s': "), | |
24603 | objfile_name (objfile)); | |
24604 | } | |
24605 | END_CATCH | |
9291a0cd TT |
24606 | } |
24607 | } | |
dce234bc PP |
24608 | } |
24609 | ||
9291a0cd TT |
24610 | \f |
24611 | ||
b4f54984 | 24612 | int dwarf_always_disassemble; |
9eae7c52 TT |
24613 | |
24614 | static void | |
b4f54984 DE |
24615 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24616 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24617 | { |
3e43a32a MS |
24618 | fprintf_filtered (file, |
24619 | _("Whether to always disassemble " | |
24620 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24621 | value); |
24622 | } | |
24623 | ||
900e11f9 JK |
24624 | static void |
24625 | show_check_physname (struct ui_file *file, int from_tty, | |
24626 | struct cmd_list_element *c, const char *value) | |
24627 | { | |
24628 | fprintf_filtered (file, | |
24629 | _("Whether to check \"physname\" is %s.\n"), | |
24630 | value); | |
24631 | } | |
24632 | ||
6502dd73 DJ |
24633 | void |
24634 | _initialize_dwarf2_read (void) | |
24635 | { | |
96d19272 JK |
24636 | struct cmd_list_element *c; |
24637 | ||
dce234bc | 24638 | dwarf2_objfile_data_key |
c1bd65d0 | 24639 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24640 | |
b4f54984 DE |
24641 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24642 | Set DWARF specific variables.\n\ | |
24643 | Configure DWARF variables such as the cache size"), | |
24644 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24645 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24646 | ||
b4f54984 DE |
24647 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24648 | Show DWARF specific variables\n\ | |
24649 | Show DWARF variables such as the cache size"), | |
24650 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24651 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24652 | ||
24653 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24654 | &dwarf_max_cache_age, _("\ |
24655 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24656 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24657 | A higher limit means that cached compilation units will be stored\n\ |
24658 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24659 | caching, which can slow down startup."), | |
2c5b56ce | 24660 | NULL, |
b4f54984 DE |
24661 | show_dwarf_max_cache_age, |
24662 | &set_dwarf_cmdlist, | |
24663 | &show_dwarf_cmdlist); | |
d97bc12b | 24664 | |
9eae7c52 | 24665 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24666 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24667 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24668 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24669 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24670 | syntax. When disabled, expressions will be printed in a more\n\ | |
24671 | conversational style, when possible."), | |
24672 | NULL, | |
b4f54984 DE |
24673 | show_dwarf_always_disassemble, |
24674 | &set_dwarf_cmdlist, | |
24675 | &show_dwarf_cmdlist); | |
24676 | ||
24677 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
24678 | Set debugging of the DWARF reader."), _("\ | |
24679 | Show debugging of the DWARF reader."), _("\ | |
24680 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
24681 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
24682 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
24683 | NULL, |
24684 | NULL, | |
24685 | &setdebuglist, &showdebuglist); | |
24686 | ||
b4f54984 DE |
24687 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24688 | Set debugging of the DWARF DIE reader."), _("\ | |
24689 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
24690 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
24691 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
24692 | NULL, |
24693 | NULL, | |
24694 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24695 | |
27e0867f DE |
24696 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24697 | Set debugging of the dwarf line reader."), _("\ | |
24698 | Show debugging of the dwarf line reader."), _("\ | |
24699 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24700 | A value of 1 (one) provides basic information.\n\ | |
24701 | A value greater than 1 provides more verbose information."), | |
24702 | NULL, | |
24703 | NULL, | |
24704 | &setdebuglist, &showdebuglist); | |
24705 | ||
900e11f9 JK |
24706 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24707 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24708 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24709 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24710 | the demangler."), | |
24711 | NULL, show_check_physname, | |
24712 | &setdebuglist, &showdebuglist); | |
24713 | ||
e615022a DE |
24714 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24715 | no_class, &use_deprecated_index_sections, _("\ | |
24716 | Set whether to use deprecated gdb_index sections."), _("\ | |
24717 | Show whether to use deprecated gdb_index sections."), _("\ | |
24718 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24719 | Normally they are ignored either because of a missing feature or\n\ | |
24720 | performance issue.\n\ | |
24721 | Warning: This option must be enabled before gdb reads the file."), | |
24722 | NULL, | |
24723 | NULL, | |
24724 | &setlist, &showlist); | |
24725 | ||
96d19272 | 24726 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 24727 | _("\ |
fc1a9d6e | 24728 | Save a gdb-index file.\n\ |
11570e71 | 24729 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
24730 | &save_cmdlist); |
24731 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
24732 | |
24733 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24734 | &dwarf2_locexpr_funcs); | |
24735 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24736 | &dwarf2_loclist_funcs); | |
24737 | ||
24738 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24739 | &dwarf2_block_frame_base_locexpr_funcs); | |
24740 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24741 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
24742 | |
24743 | #if GDB_SELF_TEST | |
24744 | selftests::register_test ("dw2_expand_symtabs_matching", | |
24745 | selftests::dw2_expand_symtabs_matching::run_test); | |
24746 | #endif | |
6502dd73 | 24747 | } |