Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
61baf725 | 3 | Copyright (C) 1994-2017 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 | 55 | #include "typeprint.h" |
ccefe4c4 | 56 | #include "psympriv.h" |
53ce3c39 | 57 | #include <sys/stat.h> |
96d19272 | 58 | #include "completer.h" |
34eaf542 | 59 | #include "vec.h" |
98bfdba5 | 60 | #include "c-lang.h" |
a766d390 | 61 | #include "go-lang.h" |
98bfdba5 | 62 | #include "valprint.h" |
3019eac3 | 63 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 64 | #include "gdb/gdb-index.h" |
60d5a603 | 65 | #include <ctype.h> |
cbb099e8 | 66 | #include "gdb_bfd.h" |
4357ac6c | 67 | #include "f-lang.h" |
05cba821 | 68 | #include "source.h" |
614c279d | 69 | #include "filestuff.h" |
dc294be5 | 70 | #include "build-id.h" |
22cee43f | 71 | #include "namespace.h" |
bef155c3 | 72 | #include "common/gdb_unlinker.h" |
14bc53a8 | 73 | #include "common/function-view.h" |
ecfb656c PA |
74 | #include "common/gdb_optional.h" |
75 | #include "common/underlying.h" | |
d5722aa2 | 76 | #include "common/byte-vector.h" |
bbf2f4df | 77 | #include "filename-seen-cache.h" |
b32b108a | 78 | #include "producer.h" |
c906108c | 79 | #include <fcntl.h> |
c906108c | 80 | #include <sys/types.h> |
325fac50 | 81 | #include <algorithm> |
bc8f2430 JK |
82 | #include <unordered_set> |
83 | #include <unordered_map> | |
c62446b1 | 84 | #include "selftest.h" |
d8151005 | 85 | |
73be47f5 DE |
86 | /* When == 1, print basic high level tracing messages. |
87 | When > 1, be more verbose. | |
b4f54984 DE |
88 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
89 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 90 | |
d97bc12b | 91 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 92 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 93 | |
27e0867f DE |
94 | /* When non-zero, dump line number entries as they are read in. */ |
95 | static unsigned int dwarf_line_debug = 0; | |
96 | ||
900e11f9 JK |
97 | /* When non-zero, cross-check physname against demangler. */ |
98 | static int check_physname = 0; | |
99 | ||
481860b3 | 100 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 101 | static int use_deprecated_index_sections = 0; |
481860b3 | 102 | |
6502dd73 DJ |
103 | static const struct objfile_data *dwarf2_objfile_data_key; |
104 | ||
f1e6e072 TT |
105 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
106 | ||
107 | static int dwarf2_locexpr_index; | |
108 | static int dwarf2_loclist_index; | |
109 | static int dwarf2_locexpr_block_index; | |
110 | static int dwarf2_loclist_block_index; | |
111 | ||
73869dc2 DE |
112 | /* A descriptor for dwarf sections. |
113 | ||
114 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
115 | scanned. BUFFER, READIN are filled in later when the section is read. | |
116 | If the section contained compressed data then SIZE is updated to record | |
117 | the uncompressed size of the section. | |
118 | ||
119 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
120 | creating the concept of virtual sections contained within a real section. | |
121 | In DWP V2 the sections of the input DWO files are concatenated together | |
122 | into one section, but section offsets are kept relative to the original | |
123 | input section. | |
124 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
125 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
126 | describe the virtual section. */ | |
127 | ||
dce234bc PP |
128 | struct dwarf2_section_info |
129 | { | |
73869dc2 DE |
130 | union |
131 | { | |
e5aa3347 | 132 | /* If this is a real section, the bfd section. */ |
049412e3 | 133 | asection *section; |
73869dc2 | 134 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 135 | section. */ |
73869dc2 DE |
136 | struct dwarf2_section_info *containing_section; |
137 | } s; | |
19ac8c2e | 138 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 139 | const gdb_byte *buffer; |
73869dc2 | 140 | /* The size of the section, real or virtual. */ |
dce234bc | 141 | bfd_size_type size; |
73869dc2 DE |
142 | /* If this is a virtual section, the offset in the real section. |
143 | Only valid if is_virtual. */ | |
144 | bfd_size_type virtual_offset; | |
be391dca | 145 | /* True if we have tried to read this section. */ |
73869dc2 DE |
146 | char readin; |
147 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 148 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 149 | char is_virtual; |
dce234bc PP |
150 | }; |
151 | ||
8b70b953 TT |
152 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
153 | DEF_VEC_O (dwarf2_section_info_def); | |
154 | ||
9291a0cd TT |
155 | /* All offsets in the index are of this type. It must be |
156 | architecture-independent. */ | |
157 | typedef uint32_t offset_type; | |
158 | ||
159 | DEF_VEC_I (offset_type); | |
160 | ||
156942c7 DE |
161 | /* Ensure only legit values are used. */ |
162 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
163 | do { \ | |
164 | gdb_assert ((unsigned int) (value) <= 1); \ | |
165 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
166 | } while (0) | |
167 | ||
168 | /* Ensure only legit values are used. */ | |
169 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
170 | do { \ | |
171 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
172 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
173 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
174 | } while (0) | |
175 | ||
176 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
177 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
178 | do { \ | |
179 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
180 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
181 | } while (0) | |
182 | ||
3f563c84 PA |
183 | #if WORDS_BIGENDIAN |
184 | ||
185 | /* Convert VALUE between big- and little-endian. */ | |
186 | ||
187 | static offset_type | |
188 | byte_swap (offset_type value) | |
189 | { | |
190 | offset_type result; | |
191 | ||
192 | result = (value & 0xff) << 24; | |
193 | result |= (value & 0xff00) << 8; | |
194 | result |= (value & 0xff0000) >> 8; | |
195 | result |= (value & 0xff000000) >> 24; | |
196 | return result; | |
197 | } | |
198 | ||
199 | #define MAYBE_SWAP(V) byte_swap (V) | |
200 | ||
201 | #else | |
202 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) | |
203 | #endif /* WORDS_BIGENDIAN */ | |
204 | ||
205 | /* An index into a (C++) symbol name component in a symbol name as | |
206 | recorded in the mapped_index's symbol table. For each C++ symbol | |
207 | in the symbol table, we record one entry for the start of each | |
208 | component in the symbol in a table of name components, and then | |
209 | sort the table, in order to be able to binary search symbol names, | |
210 | ignoring leading namespaces, both completion and regular look up. | |
211 | For example, for symbol "A::B::C", we'll have an entry that points | |
212 | to "A::B::C", another that points to "B::C", and another for "C". | |
213 | Note that function symbols in GDB index have no parameter | |
214 | information, just the function/method names. You can convert a | |
215 | name_component to a "const char *" using the | |
216 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
217 | ||
218 | struct name_component | |
219 | { | |
220 | /* Offset in the symbol name where the component starts. Stored as | |
221 | a (32-bit) offset instead of a pointer to save memory and improve | |
222 | locality on 64-bit architectures. */ | |
223 | offset_type name_offset; | |
224 | ||
225 | /* The symbol's index in the symbol and constant pool tables of a | |
226 | mapped_index. */ | |
227 | offset_type idx; | |
228 | }; | |
229 | ||
9291a0cd TT |
230 | /* A description of the mapped index. The file format is described in |
231 | a comment by the code that writes the index. */ | |
232 | struct mapped_index | |
233 | { | |
559a7a62 JK |
234 | /* Index data format version. */ |
235 | int version; | |
236 | ||
9291a0cd TT |
237 | /* The total length of the buffer. */ |
238 | off_t total_size; | |
b11b1f88 | 239 | |
9291a0cd TT |
240 | /* A pointer to the address table data. */ |
241 | const gdb_byte *address_table; | |
b11b1f88 | 242 | |
9291a0cd TT |
243 | /* Size of the address table data in bytes. */ |
244 | offset_type address_table_size; | |
b11b1f88 | 245 | |
3876f04e DE |
246 | /* The symbol table, implemented as a hash table. */ |
247 | const offset_type *symbol_table; | |
b11b1f88 | 248 | |
9291a0cd | 249 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 250 | offset_type symbol_table_slots; |
b11b1f88 | 251 | |
9291a0cd TT |
252 | /* A pointer to the constant pool. */ |
253 | const char *constant_pool; | |
3f563c84 PA |
254 | |
255 | /* The name_component table (a sorted vector). See name_component's | |
256 | description above. */ | |
257 | std::vector<name_component> name_components; | |
258 | ||
5c58de74 PA |
259 | /* How NAME_COMPONENTS is sorted. */ |
260 | enum case_sensitivity name_components_casing; | |
261 | ||
3f563c84 PA |
262 | /* Convenience method to get at the name of the symbol at IDX in the |
263 | symbol table. */ | |
264 | const char *symbol_name_at (offset_type idx) const | |
265 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx]); } | |
5c58de74 PA |
266 | |
267 | /* Build the symbol name component sorted vector, if we haven't | |
268 | yet. */ | |
269 | void build_name_components (); | |
270 | ||
271 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
272 | possible matches for LN_NO_PARAMS in the name component | |
273 | vector. */ | |
274 | std::pair<std::vector<name_component>::const_iterator, | |
275 | std::vector<name_component>::const_iterator> | |
276 | find_name_components_bounds (const lookup_name_info &ln_no_params) const; | |
9291a0cd TT |
277 | }; |
278 | ||
95554aad TT |
279 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
280 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
281 | ||
52059ffd TT |
282 | struct tu_stats |
283 | { | |
284 | int nr_uniq_abbrev_tables; | |
285 | int nr_symtabs; | |
286 | int nr_symtab_sharers; | |
287 | int nr_stmt_less_type_units; | |
288 | int nr_all_type_units_reallocs; | |
289 | }; | |
290 | ||
9cdd5dbd DE |
291 | /* Collection of data recorded per objfile. |
292 | This hangs off of dwarf2_objfile_data_key. */ | |
293 | ||
6502dd73 DJ |
294 | struct dwarf2_per_objfile |
295 | { | |
330cdd98 PA |
296 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
297 | dwarf2 section names, or is NULL if the standard ELF names are | |
298 | used. */ | |
299 | dwarf2_per_objfile (struct objfile *objfile, | |
300 | const dwarf2_debug_sections *names); | |
ae038cb0 | 301 | |
330cdd98 PA |
302 | ~dwarf2_per_objfile (); |
303 | ||
d6541620 | 304 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
305 | |
306 | /* Free all cached compilation units. */ | |
307 | void free_cached_comp_units (); | |
308 | private: | |
309 | /* This function is mapped across the sections and remembers the | |
310 | offset and size of each of the debugging sections we are | |
311 | interested in. */ | |
312 | void locate_sections (bfd *abfd, asection *sectp, | |
313 | const dwarf2_debug_sections &names); | |
314 | ||
315 | public: | |
316 | dwarf2_section_info info {}; | |
317 | dwarf2_section_info abbrev {}; | |
318 | dwarf2_section_info line {}; | |
319 | dwarf2_section_info loc {}; | |
320 | dwarf2_section_info loclists {}; | |
321 | dwarf2_section_info macinfo {}; | |
322 | dwarf2_section_info macro {}; | |
323 | dwarf2_section_info str {}; | |
324 | dwarf2_section_info line_str {}; | |
325 | dwarf2_section_info ranges {}; | |
326 | dwarf2_section_info rnglists {}; | |
327 | dwarf2_section_info addr {}; | |
328 | dwarf2_section_info frame {}; | |
329 | dwarf2_section_info eh_frame {}; | |
330 | dwarf2_section_info gdb_index {}; | |
331 | ||
332 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 333 | |
be391dca | 334 | /* Back link. */ |
330cdd98 | 335 | struct objfile *objfile = NULL; |
be391dca | 336 | |
d467dd73 | 337 | /* Table of all the compilation units. This is used to locate |
10b3939b | 338 | the target compilation unit of a particular reference. */ |
330cdd98 | 339 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
340 | |
341 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 342 | int n_comp_units = 0; |
ae038cb0 | 343 | |
1fd400ff | 344 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 345 | int n_type_units = 0; |
1fd400ff | 346 | |
6aa5f3a6 DE |
347 | /* The number of elements allocated in all_type_units. |
348 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 349 | int n_allocated_type_units = 0; |
6aa5f3a6 | 350 | |
a2ce51a0 DE |
351 | /* The .debug_types-related CUs (TUs). |
352 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 353 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 354 | |
f4dc4d17 DE |
355 | /* Table of struct type_unit_group objects. |
356 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 357 | htab_t type_unit_groups {}; |
72dca2f5 | 358 | |
348e048f DE |
359 | /* A table mapping .debug_types signatures to its signatured_type entry. |
360 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 361 | htab_t signatured_types {}; |
348e048f | 362 | |
f4dc4d17 DE |
363 | /* Type unit statistics, to see how well the scaling improvements |
364 | are doing. */ | |
330cdd98 | 365 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
366 | |
367 | /* A chain of compilation units that are currently read in, so that | |
368 | they can be freed later. */ | |
330cdd98 | 369 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 370 | |
3019eac3 DE |
371 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
372 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 373 | htab_t dwo_files {}; |
3019eac3 | 374 | |
330cdd98 PA |
375 | /* True if we've checked for whether there is a DWP file. */ |
376 | bool dwp_checked = false; | |
80626a55 DE |
377 | |
378 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 379 | struct dwp_file *dwp_file = NULL; |
80626a55 | 380 | |
36586728 TT |
381 | /* The shared '.dwz' file, if one exists. This is used when the |
382 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 383 | struct dwz_file *dwz_file = NULL; |
36586728 | 384 | |
330cdd98 | 385 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 386 | VMA of 0. */ |
330cdd98 | 387 | bool has_section_at_zero = false; |
9291a0cd | 388 | |
ae2de4f8 DE |
389 | /* True if we are using the mapped index, |
390 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 391 | bool using_index = false; |
9291a0cd | 392 | |
ae2de4f8 | 393 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 394 | mapped_index *index_table = NULL; |
98bfdba5 | 395 | |
7b9f3c50 | 396 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
397 | TUs typically share line table entries with a CU, so we maintain a |
398 | separate table of all line table entries to support the sharing. | |
399 | Note that while there can be way more TUs than CUs, we've already | |
400 | sorted all the TUs into "type unit groups", grouped by their | |
401 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
402 | CU and its associated TU group if there is one. */ | |
330cdd98 | 403 | htab_t quick_file_names_table {}; |
7b9f3c50 | 404 | |
98bfdba5 PA |
405 | /* Set during partial symbol reading, to prevent queueing of full |
406 | symbols. */ | |
330cdd98 | 407 | bool reading_partial_symbols = false; |
673bfd45 | 408 | |
dee91e82 | 409 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 410 | This is NULL if not allocated yet. |
02142a6c | 411 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 412 | htab_t die_type_hash {}; |
95554aad TT |
413 | |
414 | /* The CUs we recently read. */ | |
330cdd98 | 415 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
416 | |
417 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 418 | htab_t line_header_hash {}; |
bbf2f4df PA |
419 | |
420 | /* Table containing all filenames. This is an optional because the | |
421 | table is lazily constructed on first access. */ | |
422 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
423 | }; |
424 | ||
425 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 426 | |
251d32d9 | 427 | /* Default names of the debugging sections. */ |
c906108c | 428 | |
233a11ab CS |
429 | /* Note that if the debugging section has been compressed, it might |
430 | have a name like .zdebug_info. */ | |
431 | ||
9cdd5dbd DE |
432 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
433 | { | |
251d32d9 TG |
434 | { ".debug_info", ".zdebug_info" }, |
435 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
436 | { ".debug_line", ".zdebug_line" }, | |
437 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 438 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 439 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 440 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 441 | { ".debug_str", ".zdebug_str" }, |
43988095 | 442 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 443 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 444 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 445 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 446 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
447 | { ".debug_frame", ".zdebug_frame" }, |
448 | { ".eh_frame", NULL }, | |
24d3216f TT |
449 | { ".gdb_index", ".zgdb_index" }, |
450 | 23 | |
251d32d9 | 451 | }; |
c906108c | 452 | |
80626a55 | 453 | /* List of DWO/DWP sections. */ |
3019eac3 | 454 | |
80626a55 | 455 | static const struct dwop_section_names |
3019eac3 DE |
456 | { |
457 | struct dwarf2_section_names abbrev_dwo; | |
458 | struct dwarf2_section_names info_dwo; | |
459 | struct dwarf2_section_names line_dwo; | |
460 | struct dwarf2_section_names loc_dwo; | |
43988095 | 461 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
462 | struct dwarf2_section_names macinfo_dwo; |
463 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
464 | struct dwarf2_section_names str_dwo; |
465 | struct dwarf2_section_names str_offsets_dwo; | |
466 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
467 | struct dwarf2_section_names cu_index; |
468 | struct dwarf2_section_names tu_index; | |
3019eac3 | 469 | } |
80626a55 | 470 | dwop_section_names = |
3019eac3 DE |
471 | { |
472 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
473 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
474 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
475 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 476 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
477 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
478 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
479 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
480 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
481 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
482 | { ".debug_cu_index", ".zdebug_cu_index" }, |
483 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
484 | }; |
485 | ||
c906108c SS |
486 | /* local data types */ |
487 | ||
107d2387 AC |
488 | /* The data in a compilation unit header, after target2host |
489 | translation, looks like this. */ | |
c906108c | 490 | struct comp_unit_head |
a738430d | 491 | { |
c764a876 | 492 | unsigned int length; |
a738430d | 493 | short version; |
a738430d MK |
494 | unsigned char addr_size; |
495 | unsigned char signed_addr_p; | |
9c541725 | 496 | sect_offset abbrev_sect_off; |
57349743 | 497 | |
a738430d MK |
498 | /* Size of file offsets; either 4 or 8. */ |
499 | unsigned int offset_size; | |
57349743 | 500 | |
a738430d MK |
501 | /* Size of the length field; either 4 or 12. */ |
502 | unsigned int initial_length_size; | |
57349743 | 503 | |
43988095 JK |
504 | enum dwarf_unit_type unit_type; |
505 | ||
a738430d MK |
506 | /* Offset to the first byte of this compilation unit header in the |
507 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 508 | sect_offset sect_off; |
57349743 | 509 | |
d00adf39 DE |
510 | /* Offset to first die in this cu from the start of the cu. |
511 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 512 | cu_offset first_die_cu_offset; |
43988095 JK |
513 | |
514 | /* 64-bit signature of this type unit - it is valid only for | |
515 | UNIT_TYPE DW_UT_type. */ | |
516 | ULONGEST signature; | |
517 | ||
518 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 519 | cu_offset type_cu_offset_in_tu; |
a738430d | 520 | }; |
c906108c | 521 | |
3da10d80 KS |
522 | /* Type used for delaying computation of method physnames. |
523 | See comments for compute_delayed_physnames. */ | |
524 | struct delayed_method_info | |
525 | { | |
526 | /* The type to which the method is attached, i.e., its parent class. */ | |
527 | struct type *type; | |
528 | ||
529 | /* The index of the method in the type's function fieldlists. */ | |
530 | int fnfield_index; | |
531 | ||
532 | /* The index of the method in the fieldlist. */ | |
533 | int index; | |
534 | ||
535 | /* The name of the DIE. */ | |
536 | const char *name; | |
537 | ||
538 | /* The DIE associated with this method. */ | |
539 | struct die_info *die; | |
540 | }; | |
541 | ||
542 | typedef struct delayed_method_info delayed_method_info; | |
543 | DEF_VEC_O (delayed_method_info); | |
544 | ||
e7c27a73 DJ |
545 | /* Internal state when decoding a particular compilation unit. */ |
546 | struct dwarf2_cu | |
547 | { | |
548 | /* The objfile containing this compilation unit. */ | |
549 | struct objfile *objfile; | |
550 | ||
d00adf39 | 551 | /* The header of the compilation unit. */ |
e7c27a73 | 552 | struct comp_unit_head header; |
e142c38c | 553 | |
d00adf39 DE |
554 | /* Base address of this compilation unit. */ |
555 | CORE_ADDR base_address; | |
556 | ||
557 | /* Non-zero if base_address has been set. */ | |
558 | int base_known; | |
559 | ||
e142c38c DJ |
560 | /* The language we are debugging. */ |
561 | enum language language; | |
562 | const struct language_defn *language_defn; | |
563 | ||
b0f35d58 DL |
564 | const char *producer; |
565 | ||
e142c38c DJ |
566 | /* The generic symbol table building routines have separate lists for |
567 | file scope symbols and all all other scopes (local scopes). So | |
568 | we need to select the right one to pass to add_symbol_to_list(). | |
569 | We do it by keeping a pointer to the correct list in list_in_scope. | |
570 | ||
571 | FIXME: The original dwarf code just treated the file scope as the | |
572 | first local scope, and all other local scopes as nested local | |
573 | scopes, and worked fine. Check to see if we really need to | |
574 | distinguish these in buildsym.c. */ | |
575 | struct pending **list_in_scope; | |
576 | ||
433df2d4 DE |
577 | /* The abbrev table for this CU. |
578 | Normally this points to the abbrev table in the objfile. | |
579 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
580 | struct abbrev_table *abbrev_table; | |
72bf9492 | 581 | |
b64f50a1 JK |
582 | /* Hash table holding all the loaded partial DIEs |
583 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
584 | htab_t partial_dies; |
585 | ||
586 | /* Storage for things with the same lifetime as this read-in compilation | |
587 | unit, including partial DIEs. */ | |
588 | struct obstack comp_unit_obstack; | |
589 | ||
ae038cb0 DJ |
590 | /* When multiple dwarf2_cu structures are living in memory, this field |
591 | chains them all together, so that they can be released efficiently. | |
592 | We will probably also want a generation counter so that most-recently-used | |
593 | compilation units are cached... */ | |
594 | struct dwarf2_per_cu_data *read_in_chain; | |
595 | ||
69d751e3 | 596 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
597 | struct dwarf2_per_cu_data *per_cu; |
598 | ||
599 | /* How many compilation units ago was this CU last referenced? */ | |
600 | int last_used; | |
601 | ||
b64f50a1 JK |
602 | /* A hash table of DIE cu_offset for following references with |
603 | die_info->offset.sect_off as hash. */ | |
51545339 | 604 | htab_t die_hash; |
10b3939b DJ |
605 | |
606 | /* Full DIEs if read in. */ | |
607 | struct die_info *dies; | |
608 | ||
609 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
610 | units referenced by this one. Only set during full symbol processing; | |
611 | partial symbol tables do not have dependencies. */ | |
612 | htab_t dependencies; | |
613 | ||
cb1df416 DJ |
614 | /* Header data from the line table, during full symbol processing. */ |
615 | struct line_header *line_header; | |
4c8aa72d PA |
616 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
617 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
618 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
619 | to the line header as long as this DIE is being processed. See | |
620 | process_die_scope. */ | |
621 | die_info *line_header_die_owner; | |
cb1df416 | 622 | |
3da10d80 KS |
623 | /* A list of methods which need to have physnames computed |
624 | after all type information has been read. */ | |
625 | VEC (delayed_method_info) *method_list; | |
626 | ||
96408a79 SA |
627 | /* To be copied to symtab->call_site_htab. */ |
628 | htab_t call_site_htab; | |
629 | ||
034e5797 DE |
630 | /* Non-NULL if this CU came from a DWO file. |
631 | There is an invariant here that is important to remember: | |
632 | Except for attributes copied from the top level DIE in the "main" | |
633 | (or "stub") file in preparation for reading the DWO file | |
634 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
635 | Either there isn't a DWO file (in which case this is NULL and the point | |
636 | is moot), or there is and either we're not going to read it (in which | |
637 | case this is NULL) or there is and we are reading it (in which case this | |
638 | is non-NULL). */ | |
3019eac3 DE |
639 | struct dwo_unit *dwo_unit; |
640 | ||
641 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
642 | (zero is a valid value though). | |
1dbab08b | 643 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
644 | ULONGEST addr_base; |
645 | ||
2e3cf129 DE |
646 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
647 | (zero is a valid value though). | |
1dbab08b | 648 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 649 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
650 | be used without needing to know whether DWO files are in use or not. |
651 | N.B. This does not apply to DW_AT_ranges appearing in | |
652 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
653 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
654 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
655 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
656 | ULONGEST ranges_base; |
657 | ||
ae038cb0 DJ |
658 | /* Mark used when releasing cached dies. */ |
659 | unsigned int mark : 1; | |
660 | ||
8be455d7 JK |
661 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
662 | This test is imperfect as there may exist optimized debug code not using | |
663 | any location list and still facing inlining issues if handled as | |
664 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 665 | unsigned int has_loclist : 1; |
ba919b58 | 666 | |
1b80a9fa JK |
667 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
668 | if all the producer_is_* fields are valid. This information is cached | |
669 | because profiling CU expansion showed excessive time spent in | |
670 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
671 | unsigned int checked_producer : 1; |
672 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 673 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 674 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
675 | |
676 | /* When set, the file that we're processing is known to have | |
677 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
678 | this information, but later versions do. */ | |
679 | ||
680 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
681 | }; |
682 | ||
10b3939b DJ |
683 | /* Persistent data held for a compilation unit, even when not |
684 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 685 | read_symtab_private field of the psymtab. */ |
10b3939b | 686 | |
ae038cb0 DJ |
687 | struct dwarf2_per_cu_data |
688 | { | |
36586728 | 689 | /* The start offset and length of this compilation unit. |
45452591 | 690 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
691 | initial_length_size. |
692 | If the DIE refers to a DWO file, this is always of the original die, | |
693 | not the DWO file. */ | |
9c541725 | 694 | sect_offset sect_off; |
36586728 | 695 | unsigned int length; |
ae038cb0 | 696 | |
43988095 JK |
697 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
698 | short dwarf_version; | |
699 | ||
ae038cb0 DJ |
700 | /* Flag indicating this compilation unit will be read in before |
701 | any of the current compilation units are processed. */ | |
c764a876 | 702 | unsigned int queued : 1; |
ae038cb0 | 703 | |
0d99eb77 DE |
704 | /* This flag will be set when reading partial DIEs if we need to load |
705 | absolutely all DIEs for this compilation unit, instead of just the ones | |
706 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
707 | hash table and don't find it. */ |
708 | unsigned int load_all_dies : 1; | |
709 | ||
0186c6a7 DE |
710 | /* Non-zero if this CU is from .debug_types. |
711 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
712 | this is non-zero. */ | |
3019eac3 DE |
713 | unsigned int is_debug_types : 1; |
714 | ||
36586728 TT |
715 | /* Non-zero if this CU is from the .dwz file. */ |
716 | unsigned int is_dwz : 1; | |
717 | ||
a2ce51a0 DE |
718 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
719 | This flag is only valid if is_debug_types is true. | |
720 | We can't read a CU directly from a DWO file: There are required | |
721 | attributes in the stub. */ | |
722 | unsigned int reading_dwo_directly : 1; | |
723 | ||
7ee85ab1 DE |
724 | /* Non-zero if the TU has been read. |
725 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
726 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
727 | fetching them from random other DWOs (due to comdat folding). | |
728 | If the TU has already been read, the optimization is unnecessary | |
729 | (and unwise - we don't want to change where gdb thinks the TU lives | |
730 | "midflight"). | |
731 | This flag is only valid if is_debug_types is true. */ | |
732 | unsigned int tu_read : 1; | |
733 | ||
3019eac3 DE |
734 | /* The section this CU/TU lives in. |
735 | If the DIE refers to a DWO file, this is always the original die, | |
736 | not the DWO file. */ | |
8a0459fd | 737 | struct dwarf2_section_info *section; |
348e048f | 738 | |
17ea53c3 | 739 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
740 | of the CU cache it gets reset to NULL again. This is left as NULL for |
741 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 742 | struct dwarf2_cu *cu; |
1c379e20 | 743 | |
9cdd5dbd DE |
744 | /* The corresponding objfile. |
745 | Normally we can get the objfile from dwarf2_per_objfile. | |
746 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
747 | struct objfile *objfile; |
748 | ||
fffbe6a8 YQ |
749 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
750 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
751 | union |
752 | { | |
753 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 754 | or NULL for unread partial units. */ |
9291a0cd TT |
755 | struct partial_symtab *psymtab; |
756 | ||
757 | /* Data needed by the "quick" functions. */ | |
758 | struct dwarf2_per_cu_quick_data *quick; | |
759 | } v; | |
95554aad | 760 | |
796a7ff8 DE |
761 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
762 | while reading psymtabs, used to compute the psymtab dependencies, | |
763 | and then cleared. Then it is filled in again while reading full | |
764 | symbols, and only deleted when the objfile is destroyed. | |
765 | ||
766 | This is also used to work around a difference between the way gold | |
767 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
768 | is a gold bug. For symbols coming from TUs, gold records in the index | |
769 | the CU that includes the TU instead of the TU itself. This breaks | |
770 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
771 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
772 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
773 | we need to look in TU Z to find X. Fortunately, this is akin to | |
774 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
775 | .gdb_index version <=7 this also records the TUs that the CU referred | |
776 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
777 | indices so we only pay a price for gold generated indices. |
778 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 779 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
780 | }; |
781 | ||
348e048f DE |
782 | /* Entry in the signatured_types hash table. */ |
783 | ||
784 | struct signatured_type | |
785 | { | |
42e7ad6c | 786 | /* The "per_cu" object of this type. |
ac9ec31b | 787 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
788 | N.B.: This is the first member so that it's easy to convert pointers |
789 | between them. */ | |
790 | struct dwarf2_per_cu_data per_cu; | |
791 | ||
3019eac3 | 792 | /* The type's signature. */ |
348e048f DE |
793 | ULONGEST signature; |
794 | ||
3019eac3 | 795 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
796 | If this TU is a DWO stub and the definition lives in a DWO file |
797 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
798 | cu_offset type_offset_in_tu; |
799 | ||
800 | /* Offset in the section of the type's DIE. | |
801 | If the definition lives in a DWO file, this is the offset in the | |
802 | .debug_types.dwo section. | |
803 | The value is zero until the actual value is known. | |
804 | Zero is otherwise not a valid section offset. */ | |
805 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
806 | |
807 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
808 | can share them. This points to the containing symtab. */ | |
809 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
810 | |
811 | /* The type. | |
812 | The first time we encounter this type we fully read it in and install it | |
813 | in the symbol tables. Subsequent times we only need the type. */ | |
814 | struct type *type; | |
a2ce51a0 DE |
815 | |
816 | /* Containing DWO unit. | |
817 | This field is valid iff per_cu.reading_dwo_directly. */ | |
818 | struct dwo_unit *dwo_unit; | |
348e048f DE |
819 | }; |
820 | ||
0186c6a7 DE |
821 | typedef struct signatured_type *sig_type_ptr; |
822 | DEF_VEC_P (sig_type_ptr); | |
823 | ||
094b34ac DE |
824 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
825 | This includes type_unit_group and quick_file_names. */ | |
826 | ||
827 | struct stmt_list_hash | |
828 | { | |
829 | /* The DWO unit this table is from or NULL if there is none. */ | |
830 | struct dwo_unit *dwo_unit; | |
831 | ||
832 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 833 | sect_offset line_sect_off; |
094b34ac DE |
834 | }; |
835 | ||
f4dc4d17 DE |
836 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
837 | an object of this type. */ | |
838 | ||
839 | struct type_unit_group | |
840 | { | |
0186c6a7 | 841 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
842 | To simplify things we create an artificial CU that "includes" all the |
843 | type units using this stmt_list so that the rest of the code still has | |
844 | a "per_cu" handle on the symtab. | |
845 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 846 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
847 | struct dwarf2_per_cu_data per_cu; |
848 | ||
0186c6a7 DE |
849 | /* The TUs that share this DW_AT_stmt_list entry. |
850 | This is added to while parsing type units to build partial symtabs, | |
851 | and is deleted afterwards and not used again. */ | |
852 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 853 | |
43f3e411 | 854 | /* The compunit symtab. |
094b34ac | 855 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
856 | so we create an essentially anonymous symtab as the compunit symtab. */ |
857 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 858 | |
094b34ac DE |
859 | /* The data used to construct the hash key. */ |
860 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
861 | |
862 | /* The number of symtabs from the line header. | |
863 | The value here must match line_header.num_file_names. */ | |
864 | unsigned int num_symtabs; | |
865 | ||
866 | /* The symbol tables for this TU (obtained from the files listed in | |
867 | DW_AT_stmt_list). | |
868 | WARNING: The order of entries here must match the order of entries | |
869 | in the line header. After the first TU using this type_unit_group, the | |
870 | line header for the subsequent TUs is recreated from this. This is done | |
871 | because we need to use the same symtabs for each TU using the same | |
872 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
873 | there's no guarantee the line header doesn't have duplicate entries. */ | |
874 | struct symtab **symtabs; | |
875 | }; | |
876 | ||
73869dc2 | 877 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
878 | |
879 | struct dwo_sections | |
880 | { | |
881 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
882 | struct dwarf2_section_info line; |
883 | struct dwarf2_section_info loc; | |
43988095 | 884 | struct dwarf2_section_info loclists; |
09262596 DE |
885 | struct dwarf2_section_info macinfo; |
886 | struct dwarf2_section_info macro; | |
3019eac3 DE |
887 | struct dwarf2_section_info str; |
888 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
889 | /* In the case of a virtual DWO file, these two are unused. */ |
890 | struct dwarf2_section_info info; | |
3019eac3 DE |
891 | VEC (dwarf2_section_info_def) *types; |
892 | }; | |
893 | ||
c88ee1f0 | 894 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
895 | |
896 | struct dwo_unit | |
897 | { | |
898 | /* Backlink to the containing struct dwo_file. */ | |
899 | struct dwo_file *dwo_file; | |
900 | ||
901 | /* The "id" that distinguishes this CU/TU. | |
902 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
903 | Since signatures came first, we stick with it for consistency. */ | |
904 | ULONGEST signature; | |
905 | ||
906 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 907 | struct dwarf2_section_info *section; |
3019eac3 | 908 | |
9c541725 PA |
909 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
910 | sect_offset sect_off; | |
3019eac3 DE |
911 | unsigned int length; |
912 | ||
913 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
914 | cu_offset type_offset_in_tu; | |
915 | }; | |
916 | ||
73869dc2 DE |
917 | /* include/dwarf2.h defines the DWP section codes. |
918 | It defines a max value but it doesn't define a min value, which we | |
919 | use for error checking, so provide one. */ | |
920 | ||
921 | enum dwp_v2_section_ids | |
922 | { | |
923 | DW_SECT_MIN = 1 | |
924 | }; | |
925 | ||
80626a55 | 926 | /* Data for one DWO file. |
57d63ce2 DE |
927 | |
928 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
929 | appears in a DWP file). DWP files don't really have DWO files per se - | |
930 | comdat folding of types "loses" the DWO file they came from, and from | |
931 | a high level view DWP files appear to contain a mass of random types. | |
932 | However, to maintain consistency with the non-DWP case we pretend DWP | |
933 | files contain virtual DWO files, and we assign each TU with one virtual | |
934 | DWO file (generally based on the line and abbrev section offsets - | |
935 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
936 | |
937 | struct dwo_file | |
938 | { | |
0ac5b59e | 939 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
940 | For virtual DWO files the name is constructed from the section offsets |
941 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
942 | from related CU+TUs. */ | |
0ac5b59e DE |
943 | const char *dwo_name; |
944 | ||
945 | /* The DW_AT_comp_dir attribute. */ | |
946 | const char *comp_dir; | |
3019eac3 | 947 | |
80626a55 DE |
948 | /* The bfd, when the file is open. Otherwise this is NULL. |
949 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
950 | bfd *dbfd; | |
3019eac3 | 951 | |
73869dc2 DE |
952 | /* The sections that make up this DWO file. |
953 | Remember that for virtual DWO files in DWP V2, these are virtual | |
954 | sections (for lack of a better name). */ | |
3019eac3 DE |
955 | struct dwo_sections sections; |
956 | ||
33c5cd75 DB |
957 | /* The CUs in the file. |
958 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
959 | an extension to handle LLVM's Link Time Optimization output (where | |
960 | multiple source files may be compiled into a single object/dwo pair). */ | |
961 | htab_t cus; | |
3019eac3 DE |
962 | |
963 | /* Table of TUs in the file. | |
964 | Each element is a struct dwo_unit. */ | |
965 | htab_t tus; | |
966 | }; | |
967 | ||
80626a55 DE |
968 | /* These sections are what may appear in a DWP file. */ |
969 | ||
970 | struct dwp_sections | |
971 | { | |
73869dc2 | 972 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
973 | struct dwarf2_section_info str; |
974 | struct dwarf2_section_info cu_index; | |
975 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
976 | |
977 | /* These are only used by DWP version 2 files. | |
978 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
979 | sections are referenced by section number, and are not recorded here. | |
980 | In DWP version 2 there is at most one copy of all these sections, each | |
981 | section being (effectively) comprised of the concatenation of all of the | |
982 | individual sections that exist in the version 1 format. | |
983 | To keep the code simple we treat each of these concatenated pieces as a | |
984 | section itself (a virtual section?). */ | |
985 | struct dwarf2_section_info abbrev; | |
986 | struct dwarf2_section_info info; | |
987 | struct dwarf2_section_info line; | |
988 | struct dwarf2_section_info loc; | |
989 | struct dwarf2_section_info macinfo; | |
990 | struct dwarf2_section_info macro; | |
991 | struct dwarf2_section_info str_offsets; | |
992 | struct dwarf2_section_info types; | |
80626a55 DE |
993 | }; |
994 | ||
73869dc2 DE |
995 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
996 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 997 | |
73869dc2 | 998 | struct virtual_v1_dwo_sections |
80626a55 DE |
999 | { |
1000 | struct dwarf2_section_info abbrev; | |
1001 | struct dwarf2_section_info line; | |
1002 | struct dwarf2_section_info loc; | |
1003 | struct dwarf2_section_info macinfo; | |
1004 | struct dwarf2_section_info macro; | |
1005 | struct dwarf2_section_info str_offsets; | |
1006 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 1007 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
1008 | struct dwarf2_section_info info_or_types; |
1009 | }; | |
1010 | ||
73869dc2 DE |
1011 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
1012 | In version 2, the sections of the DWO files are concatenated together | |
1013 | and stored in one section of that name. Thus each ELF section contains | |
1014 | several "virtual" sections. */ | |
1015 | ||
1016 | struct virtual_v2_dwo_sections | |
1017 | { | |
1018 | bfd_size_type abbrev_offset; | |
1019 | bfd_size_type abbrev_size; | |
1020 | ||
1021 | bfd_size_type line_offset; | |
1022 | bfd_size_type line_size; | |
1023 | ||
1024 | bfd_size_type loc_offset; | |
1025 | bfd_size_type loc_size; | |
1026 | ||
1027 | bfd_size_type macinfo_offset; | |
1028 | bfd_size_type macinfo_size; | |
1029 | ||
1030 | bfd_size_type macro_offset; | |
1031 | bfd_size_type macro_size; | |
1032 | ||
1033 | bfd_size_type str_offsets_offset; | |
1034 | bfd_size_type str_offsets_size; | |
1035 | ||
1036 | /* Each DWP hash table entry records one CU or one TU. | |
1037 | That is recorded here, and copied to dwo_unit.section. */ | |
1038 | bfd_size_type info_or_types_offset; | |
1039 | bfd_size_type info_or_types_size; | |
1040 | }; | |
1041 | ||
80626a55 DE |
1042 | /* Contents of DWP hash tables. */ |
1043 | ||
1044 | struct dwp_hash_table | |
1045 | { | |
73869dc2 | 1046 | uint32_t version, nr_columns; |
80626a55 | 1047 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
1048 | const gdb_byte *hash_table, *unit_table; |
1049 | union | |
1050 | { | |
1051 | struct | |
1052 | { | |
1053 | const gdb_byte *indices; | |
1054 | } v1; | |
1055 | struct | |
1056 | { | |
1057 | /* This is indexed by column number and gives the id of the section | |
1058 | in that column. */ | |
1059 | #define MAX_NR_V2_DWO_SECTIONS \ | |
1060 | (1 /* .debug_info or .debug_types */ \ | |
1061 | + 1 /* .debug_abbrev */ \ | |
1062 | + 1 /* .debug_line */ \ | |
1063 | + 1 /* .debug_loc */ \ | |
1064 | + 1 /* .debug_str_offsets */ \ | |
1065 | + 1 /* .debug_macro or .debug_macinfo */) | |
1066 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
1067 | const gdb_byte *offsets; | |
1068 | const gdb_byte *sizes; | |
1069 | } v2; | |
1070 | } section_pool; | |
80626a55 DE |
1071 | }; |
1072 | ||
1073 | /* Data for one DWP file. */ | |
1074 | ||
1075 | struct dwp_file | |
1076 | { | |
1077 | /* Name of the file. */ | |
1078 | const char *name; | |
1079 | ||
73869dc2 DE |
1080 | /* File format version. */ |
1081 | int version; | |
1082 | ||
93417882 | 1083 | /* The bfd. */ |
80626a55 DE |
1084 | bfd *dbfd; |
1085 | ||
1086 | /* Section info for this file. */ | |
1087 | struct dwp_sections sections; | |
1088 | ||
57d63ce2 | 1089 | /* Table of CUs in the file. */ |
80626a55 DE |
1090 | const struct dwp_hash_table *cus; |
1091 | ||
1092 | /* Table of TUs in the file. */ | |
1093 | const struct dwp_hash_table *tus; | |
1094 | ||
19ac8c2e DE |
1095 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1096 | htab_t loaded_cus; | |
1097 | htab_t loaded_tus; | |
80626a55 | 1098 | |
73869dc2 DE |
1099 | /* Table to map ELF section numbers to their sections. |
1100 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1101 | unsigned int num_sections; |
1102 | asection **elf_sections; | |
1103 | }; | |
1104 | ||
36586728 TT |
1105 | /* This represents a '.dwz' file. */ |
1106 | ||
1107 | struct dwz_file | |
1108 | { | |
1109 | /* A dwz file can only contain a few sections. */ | |
1110 | struct dwarf2_section_info abbrev; | |
1111 | struct dwarf2_section_info info; | |
1112 | struct dwarf2_section_info str; | |
1113 | struct dwarf2_section_info line; | |
1114 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1115 | struct dwarf2_section_info gdb_index; |
36586728 TT |
1116 | |
1117 | /* The dwz's BFD. */ | |
1118 | bfd *dwz_bfd; | |
1119 | }; | |
1120 | ||
0963b4bd MS |
1121 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1122 | al. which are used for both .debug_info and .debug_types dies. | |
1123 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1124 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1125 | |
1126 | struct die_reader_specs | |
1127 | { | |
a32a8923 | 1128 | /* The bfd of die_section. */ |
93311388 DE |
1129 | bfd* abfd; |
1130 | ||
1131 | /* The CU of the DIE we are parsing. */ | |
1132 | struct dwarf2_cu *cu; | |
1133 | ||
80626a55 | 1134 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1135 | struct dwo_file *dwo_file; |
1136 | ||
dee91e82 | 1137 | /* The section the die comes from. |
3019eac3 | 1138 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1139 | struct dwarf2_section_info *die_section; |
1140 | ||
1141 | /* die_section->buffer. */ | |
d521ce57 | 1142 | const gdb_byte *buffer; |
f664829e DE |
1143 | |
1144 | /* The end of the buffer. */ | |
1145 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1146 | |
1147 | /* The value of the DW_AT_comp_dir attribute. */ | |
1148 | const char *comp_dir; | |
93311388 DE |
1149 | }; |
1150 | ||
fd820528 | 1151 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1152 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1153 | const gdb_byte *info_ptr, |
dee91e82 DE |
1154 | struct die_info *comp_unit_die, |
1155 | int has_children, | |
1156 | void *data); | |
1157 | ||
ecfb656c PA |
1158 | /* A 1-based directory index. This is a strong typedef to prevent |
1159 | accidentally using a directory index as a 0-based index into an | |
1160 | array/vector. */ | |
1161 | enum class dir_index : unsigned int {}; | |
1162 | ||
1163 | /* Likewise, a 1-based file name index. */ | |
1164 | enum class file_name_index : unsigned int {}; | |
1165 | ||
52059ffd TT |
1166 | struct file_entry |
1167 | { | |
fff8551c PA |
1168 | file_entry () = default; |
1169 | ||
ecfb656c | 1170 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1171 | unsigned int mod_time_, unsigned int length_) |
1172 | : name (name_), | |
ecfb656c | 1173 | d_index (d_index_), |
fff8551c PA |
1174 | mod_time (mod_time_), |
1175 | length (length_) | |
1176 | {} | |
1177 | ||
ecfb656c PA |
1178 | /* Return the include directory at D_INDEX stored in LH. Returns |
1179 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1180 | const char *include_dir (const line_header *lh) const; |
1181 | ||
fff8551c PA |
1182 | /* The file name. Note this is an observing pointer. The memory is |
1183 | owned by debug_line_buffer. */ | |
1184 | const char *name {}; | |
1185 | ||
8c43009f | 1186 | /* The directory index (1-based). */ |
ecfb656c | 1187 | dir_index d_index {}; |
fff8551c PA |
1188 | |
1189 | unsigned int mod_time {}; | |
1190 | ||
1191 | unsigned int length {}; | |
1192 | ||
1193 | /* True if referenced by the Line Number Program. */ | |
1194 | bool included_p {}; | |
1195 | ||
83769d0b | 1196 | /* The associated symbol table, if any. */ |
fff8551c | 1197 | struct symtab *symtab {}; |
52059ffd TT |
1198 | }; |
1199 | ||
debd256d JB |
1200 | /* The line number information for a compilation unit (found in the |
1201 | .debug_line section) begins with a "statement program header", | |
1202 | which contains the following information. */ | |
1203 | struct line_header | |
1204 | { | |
fff8551c PA |
1205 | line_header () |
1206 | : offset_in_dwz {} | |
1207 | {} | |
1208 | ||
1209 | /* Add an entry to the include directory table. */ | |
1210 | void add_include_dir (const char *include_dir); | |
1211 | ||
1212 | /* Add an entry to the file name table. */ | |
ecfb656c | 1213 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1214 | unsigned int mod_time, unsigned int length); |
1215 | ||
ecfb656c | 1216 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1217 | is out of bounds. */ |
ecfb656c | 1218 | const char *include_dir_at (dir_index index) const |
8c43009f | 1219 | { |
ecfb656c PA |
1220 | /* Convert directory index number (1-based) to vector index |
1221 | (0-based). */ | |
1222 | size_t vec_index = to_underlying (index) - 1; | |
1223 | ||
1224 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1225 | return NULL; |
ecfb656c | 1226 | return include_dirs[vec_index]; |
8c43009f PA |
1227 | } |
1228 | ||
ecfb656c | 1229 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1230 | is out of bounds. */ |
ecfb656c | 1231 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1232 | { |
ecfb656c PA |
1233 | /* Convert file name index number (1-based) to vector index |
1234 | (0-based). */ | |
1235 | size_t vec_index = to_underlying (index) - 1; | |
1236 | ||
1237 | if (vec_index >= file_names.size ()) | |
fff8551c | 1238 | return NULL; |
ecfb656c | 1239 | return &file_names[vec_index]; |
fff8551c PA |
1240 | } |
1241 | ||
1242 | /* Const version of the above. */ | |
1243 | const file_entry *file_name_at (unsigned int index) const | |
1244 | { | |
1245 | if (index >= file_names.size ()) | |
8c43009f PA |
1246 | return NULL; |
1247 | return &file_names[index]; | |
1248 | } | |
1249 | ||
527f3840 | 1250 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1251 | sect_offset sect_off {}; |
527f3840 JK |
1252 | |
1253 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1254 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1255 | ||
1256 | unsigned int total_length {}; | |
1257 | unsigned short version {}; | |
1258 | unsigned int header_length {}; | |
1259 | unsigned char minimum_instruction_length {}; | |
1260 | unsigned char maximum_ops_per_instruction {}; | |
1261 | unsigned char default_is_stmt {}; | |
1262 | int line_base {}; | |
1263 | unsigned char line_range {}; | |
1264 | unsigned char opcode_base {}; | |
debd256d JB |
1265 | |
1266 | /* standard_opcode_lengths[i] is the number of operands for the | |
1267 | standard opcode whose value is i. This means that | |
1268 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1269 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1270 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1271 | |
fff8551c PA |
1272 | /* The include_directories table. Note these are observing |
1273 | pointers. The memory is owned by debug_line_buffer. */ | |
1274 | std::vector<const char *> include_dirs; | |
debd256d | 1275 | |
fff8551c PA |
1276 | /* The file_names table. */ |
1277 | std::vector<file_entry> file_names; | |
debd256d JB |
1278 | |
1279 | /* The start and end of the statement program following this | |
6502dd73 | 1280 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1281 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1282 | }; |
c906108c | 1283 | |
fff8551c PA |
1284 | typedef std::unique_ptr<line_header> line_header_up; |
1285 | ||
8c43009f PA |
1286 | const char * |
1287 | file_entry::include_dir (const line_header *lh) const | |
1288 | { | |
ecfb656c | 1289 | return lh->include_dir_at (d_index); |
8c43009f PA |
1290 | } |
1291 | ||
c906108c | 1292 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1293 | need this much information. */ |
c906108c SS |
1294 | struct partial_die_info |
1295 | { | |
72bf9492 | 1296 | /* Offset of this DIE. */ |
9c541725 | 1297 | sect_offset sect_off; |
72bf9492 DJ |
1298 | |
1299 | /* DWARF-2 tag for this DIE. */ | |
1300 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1301 | ||
72bf9492 DJ |
1302 | /* Assorted flags describing the data found in this DIE. */ |
1303 | unsigned int has_children : 1; | |
1304 | unsigned int is_external : 1; | |
1305 | unsigned int is_declaration : 1; | |
1306 | unsigned int has_type : 1; | |
1307 | unsigned int has_specification : 1; | |
1308 | unsigned int has_pc_info : 1; | |
481860b3 | 1309 | unsigned int may_be_inlined : 1; |
72bf9492 | 1310 | |
0c1b455e TT |
1311 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1312 | unsigned int main_subprogram : 1; | |
1313 | ||
72bf9492 DJ |
1314 | /* Flag set if the SCOPE field of this structure has been |
1315 | computed. */ | |
1316 | unsigned int scope_set : 1; | |
1317 | ||
fa4028e9 JB |
1318 | /* Flag set if the DIE has a byte_size attribute. */ |
1319 | unsigned int has_byte_size : 1; | |
1320 | ||
ff908ebf AW |
1321 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1322 | unsigned int has_const_value : 1; | |
1323 | ||
98bfdba5 PA |
1324 | /* Flag set if any of the DIE's children are template arguments. */ |
1325 | unsigned int has_template_arguments : 1; | |
1326 | ||
abc72ce4 DE |
1327 | /* Flag set if fixup_partial_die has been called on this die. */ |
1328 | unsigned int fixup_called : 1; | |
1329 | ||
36586728 TT |
1330 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1331 | unsigned int is_dwz : 1; | |
1332 | ||
1333 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1334 | unsigned int spec_is_dwz : 1; | |
1335 | ||
72bf9492 | 1336 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1337 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1338 | const char *name; |
72bf9492 | 1339 | |
abc72ce4 DE |
1340 | /* The linkage name, if present. */ |
1341 | const char *linkage_name; | |
1342 | ||
72bf9492 DJ |
1343 | /* The scope to prepend to our children. This is generally |
1344 | allocated on the comp_unit_obstack, so will disappear | |
1345 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1346 | const char *scope; |
72bf9492 | 1347 | |
95554aad TT |
1348 | /* Some data associated with the partial DIE. The tag determines |
1349 | which field is live. */ | |
1350 | union | |
1351 | { | |
1352 | /* The location description associated with this DIE, if any. */ | |
1353 | struct dwarf_block *locdesc; | |
1354 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1355 | sect_offset sect_off; |
95554aad | 1356 | } d; |
72bf9492 DJ |
1357 | |
1358 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1359 | CORE_ADDR lowpc; |
1360 | CORE_ADDR highpc; | |
72bf9492 | 1361 | |
93311388 | 1362 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1363 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1364 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1365 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1366 | const gdb_byte *sibling; |
72bf9492 DJ |
1367 | |
1368 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1369 | DW_AT_specification (or DW_AT_abstract_origin or | |
1370 | DW_AT_extension). */ | |
b64f50a1 | 1371 | sect_offset spec_offset; |
72bf9492 DJ |
1372 | |
1373 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1374 | if any. */ | |
1375 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1376 | }; |
1377 | ||
0963b4bd | 1378 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1379 | struct abbrev_info |
1380 | { | |
1381 | unsigned int number; /* number identifying abbrev */ | |
1382 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1383 | unsigned short has_children; /* boolean */ |
1384 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1385 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1386 | struct abbrev_info *next; /* next in chain */ | |
1387 | }; | |
1388 | ||
1389 | struct attr_abbrev | |
1390 | { | |
9d25dd43 DE |
1391 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1392 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1393 | |
1394 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1395 | LONGEST implicit_const; | |
c906108c SS |
1396 | }; |
1397 | ||
433df2d4 DE |
1398 | /* Size of abbrev_table.abbrev_hash_table. */ |
1399 | #define ABBREV_HASH_SIZE 121 | |
1400 | ||
1401 | /* Top level data structure to contain an abbreviation table. */ | |
1402 | ||
1403 | struct abbrev_table | |
1404 | { | |
f4dc4d17 DE |
1405 | /* Where the abbrev table came from. |
1406 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1407 | sect_offset sect_off; |
433df2d4 DE |
1408 | |
1409 | /* Storage for the abbrev table. */ | |
1410 | struct obstack abbrev_obstack; | |
1411 | ||
1412 | /* Hash table of abbrevs. | |
1413 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1414 | It could be statically allocated, but the previous code didn't so we | |
1415 | don't either. */ | |
1416 | struct abbrev_info **abbrevs; | |
1417 | }; | |
1418 | ||
0963b4bd | 1419 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1420 | struct attribute |
1421 | { | |
9d25dd43 | 1422 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1423 | ENUM_BITFIELD(dwarf_form) form : 15; |
1424 | ||
1425 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1426 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1427 | here for better struct attribute alignment. */ | |
1428 | unsigned int string_is_canonical : 1; | |
1429 | ||
b60c80d6 DJ |
1430 | union |
1431 | { | |
15d034d0 | 1432 | const char *str; |
b60c80d6 | 1433 | struct dwarf_block *blk; |
43bbcdc2 PH |
1434 | ULONGEST unsnd; |
1435 | LONGEST snd; | |
b60c80d6 | 1436 | CORE_ADDR addr; |
ac9ec31b | 1437 | ULONGEST signature; |
b60c80d6 DJ |
1438 | } |
1439 | u; | |
1440 | }; | |
1441 | ||
0963b4bd | 1442 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1443 | struct die_info |
1444 | { | |
76815b17 DE |
1445 | /* DWARF-2 tag for this DIE. */ |
1446 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1447 | ||
1448 | /* Number of attributes */ | |
98bfdba5 PA |
1449 | unsigned char num_attrs; |
1450 | ||
1451 | /* True if we're presently building the full type name for the | |
1452 | type derived from this DIE. */ | |
1453 | unsigned char building_fullname : 1; | |
76815b17 | 1454 | |
adde2bff DE |
1455 | /* True if this die is in process. PR 16581. */ |
1456 | unsigned char in_process : 1; | |
1457 | ||
76815b17 DE |
1458 | /* Abbrev number */ |
1459 | unsigned int abbrev; | |
1460 | ||
93311388 | 1461 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1462 | sect_offset sect_off; |
78ba4af6 JB |
1463 | |
1464 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1465 | points to this die's parent; CHILD points to the first child of | |
1466 | this node; and all the children of a given node are chained | |
4950bc1c | 1467 | together via their SIBLING fields. */ |
639d11d3 DC |
1468 | struct die_info *child; /* Its first child, if any. */ |
1469 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1470 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1471 | |
b60c80d6 DJ |
1472 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1473 | zero, but it's not common and zero-sized arrays are not | |
1474 | sufficiently portable C. */ | |
1475 | struct attribute attrs[1]; | |
c906108c SS |
1476 | }; |
1477 | ||
0963b4bd | 1478 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1479 | |
1480 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1481 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1482 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1483 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1484 | #define DW_SND(attr) ((attr)->u.snd) | |
1485 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1486 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1487 | |
0963b4bd | 1488 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1489 | struct dwarf_block |
1490 | { | |
56eb65bd | 1491 | size_t size; |
1d6edc3c JK |
1492 | |
1493 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1494 | const gdb_byte *data; |
c906108c SS |
1495 | }; |
1496 | ||
c906108c SS |
1497 | #ifndef ATTR_ALLOC_CHUNK |
1498 | #define ATTR_ALLOC_CHUNK 4 | |
1499 | #endif | |
1500 | ||
c906108c SS |
1501 | /* Allocate fields for structs, unions and enums in this size. */ |
1502 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1503 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1504 | #endif | |
1505 | ||
c906108c SS |
1506 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1507 | but this would require a corresponding change in unpack_field_as_long | |
1508 | and friends. */ | |
1509 | static int bits_per_byte = 8; | |
1510 | ||
52059ffd TT |
1511 | struct nextfield |
1512 | { | |
1513 | struct nextfield *next; | |
1514 | int accessibility; | |
1515 | int virtuality; | |
1516 | struct field field; | |
1517 | }; | |
1518 | ||
1519 | struct nextfnfield | |
1520 | { | |
1521 | struct nextfnfield *next; | |
1522 | struct fn_field fnfield; | |
1523 | }; | |
1524 | ||
1525 | struct fnfieldlist | |
1526 | { | |
1527 | const char *name; | |
1528 | int length; | |
1529 | struct nextfnfield *head; | |
1530 | }; | |
1531 | ||
1532 | struct typedef_field_list | |
1533 | { | |
1534 | struct typedef_field field; | |
1535 | struct typedef_field_list *next; | |
1536 | }; | |
1537 | ||
c906108c SS |
1538 | /* The routines that read and process dies for a C struct or C++ class |
1539 | pass lists of data member fields and lists of member function fields | |
1540 | in an instance of a field_info structure, as defined below. */ | |
1541 | struct field_info | |
c5aa993b | 1542 | { |
0963b4bd | 1543 | /* List of data member and baseclasses fields. */ |
52059ffd | 1544 | struct nextfield *fields, *baseclasses; |
c906108c | 1545 | |
7d0ccb61 | 1546 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1547 | int nfields; |
c906108c | 1548 | |
c5aa993b JM |
1549 | /* Number of baseclasses. */ |
1550 | int nbaseclasses; | |
c906108c | 1551 | |
c5aa993b JM |
1552 | /* Set if the accesibility of one of the fields is not public. */ |
1553 | int non_public_fields; | |
c906108c | 1554 | |
c5aa993b JM |
1555 | /* Member function fieldlist array, contains name of possibly overloaded |
1556 | member function, number of overloaded member functions and a pointer | |
1557 | to the head of the member function field chain. */ | |
52059ffd | 1558 | struct fnfieldlist *fnfieldlists; |
c906108c | 1559 | |
c5aa993b JM |
1560 | /* Number of entries in the fnfieldlists array. */ |
1561 | int nfnfields; | |
98751a41 JK |
1562 | |
1563 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1564 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1565 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1566 | unsigned typedef_field_list_count; |
c5aa993b | 1567 | }; |
c906108c | 1568 | |
10b3939b DJ |
1569 | /* One item on the queue of compilation units to read in full symbols |
1570 | for. */ | |
1571 | struct dwarf2_queue_item | |
1572 | { | |
1573 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1574 | enum language pretend_language; |
10b3939b DJ |
1575 | struct dwarf2_queue_item *next; |
1576 | }; | |
1577 | ||
1578 | /* The current queue. */ | |
1579 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1580 | ||
ae038cb0 DJ |
1581 | /* Loaded secondary compilation units are kept in memory until they |
1582 | have not been referenced for the processing of this many | |
1583 | compilation units. Set this to zero to disable caching. Cache | |
1584 | sizes of up to at least twenty will improve startup time for | |
1585 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1586 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1587 | static void |
b4f54984 DE |
1588 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1589 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1590 | { |
3e43a32a | 1591 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1592 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1593 | value); |
1594 | } | |
4390d890 | 1595 | \f |
c906108c SS |
1596 | /* local function prototypes */ |
1597 | ||
a32a8923 DE |
1598 | static const char *get_section_name (const struct dwarf2_section_info *); |
1599 | ||
1600 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1601 | ||
918dd910 JK |
1602 | static void dwarf2_find_base_address (struct die_info *die, |
1603 | struct dwarf2_cu *cu); | |
1604 | ||
0018ea6f DE |
1605 | static struct partial_symtab *create_partial_symtab |
1606 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1607 | ||
f1902523 JK |
1608 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1609 | const gdb_byte *info_ptr, | |
1610 | struct die_info *type_unit_die, | |
1611 | int has_children, void *data); | |
1612 | ||
c67a9c90 | 1613 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1614 | |
72bf9492 DJ |
1615 | static void scan_partial_symbols (struct partial_die_info *, |
1616 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1617 | int, struct dwarf2_cu *); |
c906108c | 1618 | |
72bf9492 DJ |
1619 | static void add_partial_symbol (struct partial_die_info *, |
1620 | struct dwarf2_cu *); | |
63d06c5c | 1621 | |
72bf9492 DJ |
1622 | static void add_partial_namespace (struct partial_die_info *pdi, |
1623 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1624 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1625 | |
5d7cb8df | 1626 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1627 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1628 | struct dwarf2_cu *cu); |
1629 | ||
72bf9492 DJ |
1630 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1631 | struct dwarf2_cu *cu); | |
91c24f0a | 1632 | |
bc30ff58 JB |
1633 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1634 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1635 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1636 | |
257e7a09 YQ |
1637 | static void dwarf2_read_symtab (struct partial_symtab *, |
1638 | struct objfile *); | |
c906108c | 1639 | |
a14ed312 | 1640 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1641 | |
433df2d4 DE |
1642 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1643 | (const struct abbrev_table *, unsigned int); | |
1644 | ||
1645 | static struct abbrev_table *abbrev_table_read_table | |
1646 | (struct dwarf2_section_info *, sect_offset); | |
1647 | ||
1648 | static void abbrev_table_free (struct abbrev_table *); | |
1649 | ||
f4dc4d17 DE |
1650 | static void abbrev_table_free_cleanup (void *); |
1651 | ||
dee91e82 DE |
1652 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1653 | struct dwarf2_section_info *); | |
c906108c | 1654 | |
f3dd6933 | 1655 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1656 | |
d521ce57 | 1657 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1658 | |
dee91e82 | 1659 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1660 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1661 | |
d521ce57 TT |
1662 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1663 | struct partial_die_info *, | |
1664 | struct abbrev_info *, | |
1665 | unsigned int, | |
1666 | const gdb_byte *); | |
c906108c | 1667 | |
36586728 | 1668 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1669 | struct dwarf2_cu *); |
72bf9492 DJ |
1670 | |
1671 | static void fixup_partial_die (struct partial_die_info *, | |
1672 | struct dwarf2_cu *); | |
1673 | ||
d521ce57 TT |
1674 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1675 | struct attribute *, struct attr_abbrev *, | |
1676 | const gdb_byte *); | |
a8329558 | 1677 | |
a1855c1d | 1678 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1679 | |
a1855c1d | 1680 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1681 | |
a1855c1d | 1682 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1683 | |
a1855c1d | 1684 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1685 | |
a1855c1d | 1686 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1687 | |
d521ce57 | 1688 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1689 | unsigned int *); |
c906108c | 1690 | |
d521ce57 | 1691 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1692 | |
1693 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1694 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1695 | unsigned int *, unsigned int *); |
613e1657 | 1696 | |
d521ce57 TT |
1697 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1698 | const struct comp_unit_head *, | |
c764a876 DE |
1699 | unsigned int *); |
1700 | ||
d521ce57 | 1701 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1702 | |
f4dc4d17 DE |
1703 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1704 | sect_offset); | |
1705 | ||
d521ce57 | 1706 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1707 | |
d521ce57 | 1708 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1709 | |
d521ce57 TT |
1710 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1711 | const struct comp_unit_head *, | |
1712 | unsigned int *); | |
4bdf3d34 | 1713 | |
43988095 JK |
1714 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1715 | const struct comp_unit_head *, | |
1716 | unsigned int *); | |
36586728 | 1717 | |
43988095 | 1718 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1719 | |
d521ce57 | 1720 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1721 | |
d521ce57 TT |
1722 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1723 | const gdb_byte *, | |
3019eac3 DE |
1724 | unsigned int *); |
1725 | ||
d521ce57 | 1726 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1727 | ULONGEST str_index); |
3019eac3 | 1728 | |
e142c38c | 1729 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1730 | |
e142c38c DJ |
1731 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1732 | struct dwarf2_cu *); | |
c906108c | 1733 | |
348e048f | 1734 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1735 | unsigned int); |
348e048f | 1736 | |
7d45c7c3 KB |
1737 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1738 | struct dwarf2_cu *cu); | |
1739 | ||
05cf31d1 JB |
1740 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1741 | struct dwarf2_cu *cu); | |
1742 | ||
e142c38c | 1743 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1744 | |
e142c38c | 1745 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1746 | struct dwarf2_cu **); |
63d06c5c | 1747 | |
9c541725 | 1748 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1749 | struct dwarf2_cu *cu); |
debd256d | 1750 | |
f3f5162e | 1751 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1752 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1753 | CORE_ADDR, int decode_mapping); |
c906108c | 1754 | |
4d663531 | 1755 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1756 | |
43f3e411 DE |
1757 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1758 | const char *, const char *, | |
1759 | CORE_ADDR); | |
f4dc4d17 | 1760 | |
a14ed312 | 1761 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1762 | struct dwarf2_cu *); |
c906108c | 1763 | |
34eaf542 TT |
1764 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1765 | struct dwarf2_cu *, struct symbol *); | |
1766 | ||
ff39bb5e | 1767 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1768 | struct dwarf2_cu *); |
c906108c | 1769 | |
ff39bb5e | 1770 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1771 | struct type *type, |
1772 | const char *name, | |
1773 | struct obstack *obstack, | |
12df843f | 1774 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1775 | const gdb_byte **bytes, |
98bfdba5 | 1776 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1777 | |
e7c27a73 | 1778 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1779 | |
b4ba55a1 JB |
1780 | static int need_gnat_info (struct dwarf2_cu *); |
1781 | ||
3e43a32a MS |
1782 | static struct type *die_descriptive_type (struct die_info *, |
1783 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1784 | |
1785 | static void set_descriptive_type (struct type *, struct die_info *, | |
1786 | struct dwarf2_cu *); | |
1787 | ||
e7c27a73 DJ |
1788 | static struct type *die_containing_type (struct die_info *, |
1789 | struct dwarf2_cu *); | |
c906108c | 1790 | |
ff39bb5e | 1791 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1792 | struct dwarf2_cu *); |
c906108c | 1793 | |
f792889a | 1794 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1795 | |
673bfd45 DE |
1796 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1797 | ||
0d5cff50 | 1798 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1799 | |
6e70227d | 1800 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1801 | const char *suffix, int physname, |
1802 | struct dwarf2_cu *cu); | |
63d06c5c | 1803 | |
e7c27a73 | 1804 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1805 | |
348e048f DE |
1806 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1807 | ||
e7c27a73 | 1808 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1809 | |
e7c27a73 | 1810 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1811 | |
96408a79 SA |
1812 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1813 | ||
71a3c369 TT |
1814 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1815 | ||
ff013f42 JK |
1816 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1817 | struct dwarf2_cu *, struct partial_symtab *); | |
1818 | ||
3a2b436a | 1819 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1820 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1821 | enum pc_bounds_kind |
1822 | { | |
e385593e | 1823 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1824 | PC_BOUNDS_NOT_PRESENT, |
1825 | ||
e385593e JK |
1826 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1827 | were present but they do not form a valid range of PC addresses. */ | |
1828 | PC_BOUNDS_INVALID, | |
1829 | ||
3a2b436a JK |
1830 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1831 | PC_BOUNDS_RANGES, | |
1832 | ||
1833 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1834 | PC_BOUNDS_HIGH_LOW, | |
1835 | }; | |
1836 | ||
1837 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1838 | CORE_ADDR *, CORE_ADDR *, | |
1839 | struct dwarf2_cu *, | |
1840 | struct partial_symtab *); | |
c906108c | 1841 | |
fae299cd DC |
1842 | static void get_scope_pc_bounds (struct die_info *, |
1843 | CORE_ADDR *, CORE_ADDR *, | |
1844 | struct dwarf2_cu *); | |
1845 | ||
801e3a5b JB |
1846 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1847 | CORE_ADDR, struct dwarf2_cu *); | |
1848 | ||
a14ed312 | 1849 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1850 | struct dwarf2_cu *); |
c906108c | 1851 | |
a14ed312 | 1852 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1853 | struct type *, struct dwarf2_cu *); |
c906108c | 1854 | |
a14ed312 | 1855 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1856 | struct die_info *, struct type *, |
e7c27a73 | 1857 | struct dwarf2_cu *); |
c906108c | 1858 | |
a14ed312 | 1859 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1860 | struct type *, |
1861 | struct dwarf2_cu *); | |
c906108c | 1862 | |
134d01f1 | 1863 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1864 | |
e7c27a73 | 1865 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1866 | |
e7c27a73 | 1867 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1868 | |
5d7cb8df JK |
1869 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1870 | ||
22cee43f PMR |
1871 | static struct using_direct **using_directives (enum language); |
1872 | ||
27aa8d6a SW |
1873 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1874 | ||
74921315 KS |
1875 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1876 | ||
f55ee35c JK |
1877 | static struct type *read_module_type (struct die_info *die, |
1878 | struct dwarf2_cu *cu); | |
1879 | ||
38d518c9 | 1880 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1881 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1882 | |
134d01f1 | 1883 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1884 | |
e7c27a73 | 1885 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1886 | |
6e70227d | 1887 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1888 | struct dwarf2_cu *); |
1889 | ||
bf6af496 | 1890 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1891 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1892 | struct die_info *); |
639d11d3 | 1893 | |
dee91e82 | 1894 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1895 | const gdb_byte *info_ptr, |
1896 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1897 | struct die_info *parent); |
1898 | ||
d521ce57 TT |
1899 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1900 | struct die_info **, const gdb_byte *, | |
1901 | int *, int); | |
3019eac3 | 1902 | |
d521ce57 TT |
1903 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1904 | struct die_info **, const gdb_byte *, | |
1905 | int *); | |
93311388 | 1906 | |
e7c27a73 | 1907 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1908 | |
15d034d0 TT |
1909 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1910 | struct obstack *); | |
71c25dea | 1911 | |
15d034d0 | 1912 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1913 | |
15d034d0 | 1914 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1915 | struct die_info *die, |
1916 | struct dwarf2_cu *cu); | |
1917 | ||
ca69b9e6 DE |
1918 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1919 | struct dwarf2_cu *cu); | |
1920 | ||
e142c38c | 1921 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1922 | struct dwarf2_cu **); |
9219021c | 1923 | |
f39c6ffd | 1924 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1925 | |
f39c6ffd | 1926 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1927 | |
f39c6ffd | 1928 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1929 | |
a121b7c1 | 1930 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1931 | |
f39c6ffd | 1932 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1933 | |
f9aca02d | 1934 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1935 | |
d97bc12b DE |
1936 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1937 | ||
1938 | static void dump_die_for_error (struct die_info *); | |
1939 | ||
1940 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1941 | struct die_info *); | |
c906108c | 1942 | |
d97bc12b | 1943 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1944 | |
51545339 | 1945 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1946 | struct dwarf2_cu *); |
c906108c | 1947 | |
ff39bb5e | 1948 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1949 | |
ff39bb5e | 1950 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1951 | |
348e048f | 1952 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1953 | const struct attribute *, |
348e048f DE |
1954 | struct dwarf2_cu **); |
1955 | ||
10b3939b | 1956 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1957 | const struct attribute *, |
f2f0e013 | 1958 | struct dwarf2_cu **); |
c906108c | 1959 | |
348e048f | 1960 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1961 | const struct attribute *, |
348e048f DE |
1962 | struct dwarf2_cu **); |
1963 | ||
ac9ec31b DE |
1964 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1965 | struct dwarf2_cu *); | |
1966 | ||
1967 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1968 | const struct attribute *, |
ac9ec31b DE |
1969 | struct dwarf2_cu *); |
1970 | ||
e5fe5e75 | 1971 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1972 | |
52dc124a | 1973 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1974 | |
63e43d3a PMR |
1975 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1976 | struct die_info *die, struct dwarf2_cu *cu, | |
1977 | struct dynamic_prop *prop); | |
1978 | ||
c906108c SS |
1979 | /* memory allocation interface */ |
1980 | ||
7b5a2f43 | 1981 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1982 | |
b60c80d6 | 1983 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1984 | |
43f3e411 | 1985 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1986 | |
6e5a29e1 | 1987 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1988 | |
6e5a29e1 | 1989 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1990 | |
6e5a29e1 | 1991 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1992 | |
6e5a29e1 | 1993 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1994 | |
8cf6f0b1 TT |
1995 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1996 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1997 | const struct attribute *attr); |
8cf6f0b1 | 1998 | |
ff39bb5e | 1999 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 2000 | struct symbol *sym, |
f1e6e072 TT |
2001 | struct dwarf2_cu *cu, |
2002 | int is_block); | |
4c2df51b | 2003 | |
d521ce57 TT |
2004 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
2005 | const gdb_byte *info_ptr, | |
2006 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 2007 | |
72bf9492 DJ |
2008 | static void free_stack_comp_unit (void *); |
2009 | ||
72bf9492 DJ |
2010 | static hashval_t partial_die_hash (const void *item); |
2011 | ||
2012 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
2013 | ||
ae038cb0 | 2014 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 2015 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 2016 | |
9816fde3 | 2017 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 2018 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
2019 | |
2020 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
2021 | struct die_info *comp_unit_die, |
2022 | enum language pretend_language); | |
93311388 | 2023 | |
68dc6402 | 2024 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
2025 | |
2026 | static void free_cached_comp_units (void *); | |
2027 | ||
2028 | static void age_cached_comp_units (void); | |
2029 | ||
dee91e82 | 2030 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 2031 | |
f792889a DJ |
2032 | static struct type *set_die_type (struct die_info *, struct type *, |
2033 | struct dwarf2_cu *); | |
1c379e20 | 2034 | |
ae038cb0 DJ |
2035 | static void create_all_comp_units (struct objfile *); |
2036 | ||
0e50663e | 2037 | static int create_all_type_units (struct objfile *); |
1fd400ff | 2038 | |
95554aad TT |
2039 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
2040 | enum language); | |
10b3939b | 2041 | |
95554aad TT |
2042 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
2043 | enum language); | |
10b3939b | 2044 | |
f4dc4d17 DE |
2045 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
2046 | enum language); | |
2047 | ||
10b3939b DJ |
2048 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
2049 | struct dwarf2_per_cu_data *); | |
2050 | ||
ae038cb0 DJ |
2051 | static void dwarf2_mark (struct dwarf2_cu *); |
2052 | ||
2053 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
2054 | ||
b64f50a1 | 2055 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 2056 | struct dwarf2_per_cu_data *); |
673bfd45 | 2057 | |
f792889a | 2058 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 2059 | |
9291a0cd TT |
2060 | static void dwarf2_release_queue (void *dummy); |
2061 | ||
95554aad TT |
2062 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
2063 | enum language pretend_language); | |
2064 | ||
a0f42c21 | 2065 | static void process_queue (void); |
9291a0cd | 2066 | |
d721ba37 PA |
2067 | /* The return type of find_file_and_directory. Note, the enclosed |
2068 | string pointers are only valid while this object is valid. */ | |
2069 | ||
2070 | struct file_and_directory | |
2071 | { | |
2072 | /* The filename. This is never NULL. */ | |
2073 | const char *name; | |
2074 | ||
2075 | /* The compilation directory. NULL if not known. If we needed to | |
2076 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2077 | points directly to the DW_AT_comp_dir string attribute owned by | |
2078 | the obstack that owns the DIE. */ | |
2079 | const char *comp_dir; | |
2080 | ||
2081 | /* If we needed to build a new string for comp_dir, this is what | |
2082 | owns the storage. */ | |
2083 | std::string comp_dir_storage; | |
2084 | }; | |
2085 | ||
2086 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2087 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2088 | |
2089 | static char *file_full_name (int file, struct line_header *lh, | |
2090 | const char *comp_dir); | |
2091 | ||
43988095 JK |
2092 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2093 | enum class rcuh_kind { COMPILE, TYPE }; | |
2094 | ||
d521ce57 | 2095 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2096 | (struct comp_unit_head *header, |
2097 | struct dwarf2_section_info *section, | |
d521ce57 | 2098 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2099 | rcuh_kind section_kind); |
36586728 | 2100 | |
fd820528 | 2101 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2102 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2103 | int use_existing_cu, int keep, | |
3019eac3 DE |
2104 | die_reader_func_ftype *die_reader_func, void *data); |
2105 | ||
dee91e82 DE |
2106 | static void init_cutu_and_read_dies_simple |
2107 | (struct dwarf2_per_cu_data *this_cu, | |
2108 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2109 | |
673bfd45 | 2110 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2111 | |
3019eac3 DE |
2112 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2113 | ||
57d63ce2 DE |
2114 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2115 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2116 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2117 | |
2118 | static struct dwp_file *get_dwp_file (void); | |
2119 | ||
3019eac3 | 2120 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2121 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2122 | |
2123 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2124 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2125 | |
89e63ee4 DE |
2126 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2127 | ||
3019eac3 DE |
2128 | static void free_dwo_file_cleanup (void *); |
2129 | ||
95554aad TT |
2130 | static void process_cu_includes (void); |
2131 | ||
1b80a9fa | 2132 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2133 | |
2134 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2135 | \f |
2136 | /* Various complaints about symbol reading that don't abort the process. */ | |
2137 | ||
2138 | static void | |
2139 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2140 | { | |
2141 | complaint (&symfile_complaints, | |
2142 | _("statement list doesn't fit in .debug_line section")); | |
2143 | } | |
2144 | ||
2145 | static void | |
2146 | dwarf2_debug_line_missing_file_complaint (void) | |
2147 | { | |
2148 | complaint (&symfile_complaints, | |
2149 | _(".debug_line section has line data without a file")); | |
2150 | } | |
2151 | ||
2152 | static void | |
2153 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2154 | { | |
2155 | complaint (&symfile_complaints, | |
2156 | _(".debug_line section has line " | |
2157 | "program sequence without an end")); | |
2158 | } | |
2159 | ||
2160 | static void | |
2161 | dwarf2_complex_location_expr_complaint (void) | |
2162 | { | |
2163 | complaint (&symfile_complaints, _("location expression too complex")); | |
2164 | } | |
2165 | ||
2166 | static void | |
2167 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2168 | int arg3) | |
2169 | { | |
2170 | complaint (&symfile_complaints, | |
2171 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2172 | arg1, arg2, arg3); | |
2173 | } | |
2174 | ||
2175 | static void | |
2176 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2177 | { | |
2178 | complaint (&symfile_complaints, | |
2179 | _("debug info runs off end of %s section" | |
2180 | " [in module %s]"), | |
a32a8923 DE |
2181 | get_section_name (section), |
2182 | get_section_file_name (section)); | |
4390d890 | 2183 | } |
1b80a9fa | 2184 | |
4390d890 DE |
2185 | static void |
2186 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2187 | { | |
2188 | complaint (&symfile_complaints, | |
2189 | _("macro debug info contains a " | |
2190 | "malformed macro definition:\n`%s'"), | |
2191 | arg1); | |
2192 | } | |
2193 | ||
2194 | static void | |
2195 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2196 | { | |
2197 | complaint (&symfile_complaints, | |
2198 | _("invalid attribute class or form for '%s' in '%s'"), | |
2199 | arg1, arg2); | |
2200 | } | |
527f3840 JK |
2201 | |
2202 | /* Hash function for line_header_hash. */ | |
2203 | ||
2204 | static hashval_t | |
2205 | line_header_hash (const struct line_header *ofs) | |
2206 | { | |
9c541725 | 2207 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2208 | } |
2209 | ||
2210 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2211 | ||
2212 | static hashval_t | |
2213 | line_header_hash_voidp (const void *item) | |
2214 | { | |
9a3c8263 | 2215 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2216 | |
2217 | return line_header_hash (ofs); | |
2218 | } | |
2219 | ||
2220 | /* Equality function for line_header_hash. */ | |
2221 | ||
2222 | static int | |
2223 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2224 | { | |
9a3c8263 SM |
2225 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2226 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2227 | |
9c541725 | 2228 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2229 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2230 | } | |
2231 | ||
4390d890 | 2232 | \f |
9291a0cd | 2233 | |
31aa7e4e JB |
2234 | /* Read the given attribute value as an address, taking the attribute's |
2235 | form into account. */ | |
2236 | ||
2237 | static CORE_ADDR | |
2238 | attr_value_as_address (struct attribute *attr) | |
2239 | { | |
2240 | CORE_ADDR addr; | |
2241 | ||
2242 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2243 | { | |
2244 | /* Aside from a few clearly defined exceptions, attributes that | |
2245 | contain an address must always be in DW_FORM_addr form. | |
2246 | Unfortunately, some compilers happen to be violating this | |
2247 | requirement by encoding addresses using other forms, such | |
2248 | as DW_FORM_data4 for example. For those broken compilers, | |
2249 | we try to do our best, without any guarantee of success, | |
2250 | to interpret the address correctly. It would also be nice | |
2251 | to generate a complaint, but that would require us to maintain | |
2252 | a list of legitimate cases where a non-address form is allowed, | |
2253 | as well as update callers to pass in at least the CU's DWARF | |
2254 | version. This is more overhead than what we're willing to | |
2255 | expand for a pretty rare case. */ | |
2256 | addr = DW_UNSND (attr); | |
2257 | } | |
2258 | else | |
2259 | addr = DW_ADDR (attr); | |
2260 | ||
2261 | return addr; | |
2262 | } | |
2263 | ||
9291a0cd TT |
2264 | /* The suffix for an index file. */ |
2265 | #define INDEX_SUFFIX ".gdb-index" | |
2266 | ||
330cdd98 PA |
2267 | /* See declaration. */ |
2268 | ||
2269 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2270 | const dwarf2_debug_sections *names) | |
2271 | : objfile (objfile_) | |
2272 | { | |
2273 | if (names == NULL) | |
2274 | names = &dwarf2_elf_names; | |
2275 | ||
2276 | bfd *obfd = objfile->obfd; | |
2277 | ||
2278 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2279 | locate_sections (obfd, sec, *names); | |
2280 | } | |
2281 | ||
2282 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2283 | { | |
2284 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2285 | free_cached_comp_units (); | |
2286 | ||
2287 | if (quick_file_names_table) | |
2288 | htab_delete (quick_file_names_table); | |
2289 | ||
2290 | if (line_header_hash) | |
2291 | htab_delete (line_header_hash); | |
2292 | ||
2293 | /* Everything else should be on the objfile obstack. */ | |
2294 | } | |
2295 | ||
2296 | /* See declaration. */ | |
2297 | ||
2298 | void | |
2299 | dwarf2_per_objfile::free_cached_comp_units () | |
2300 | { | |
2301 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2302 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2303 | while (per_cu != NULL) | |
2304 | { | |
2305 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2306 | ||
2307 | free_heap_comp_unit (per_cu->cu); | |
2308 | *last_chain = next_cu; | |
2309 | per_cu = next_cu; | |
2310 | } | |
2311 | } | |
2312 | ||
c906108c | 2313 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2314 | information and return true if we have enough to do something. |
2315 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2316 | ELF names are used. */ | |
c906108c SS |
2317 | |
2318 | int | |
251d32d9 TG |
2319 | dwarf2_has_info (struct objfile *objfile, |
2320 | const struct dwarf2_debug_sections *names) | |
c906108c | 2321 | { |
9a3c8263 SM |
2322 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2323 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2324 | if (!dwarf2_per_objfile) |
2325 | { | |
2326 | /* Initialize per-objfile state. */ | |
2327 | struct dwarf2_per_objfile *data | |
8d749320 | 2328 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2329 | |
330cdd98 PA |
2330 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2331 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2332 | } |
73869dc2 | 2333 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2334 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2335 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2336 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2337 | } |
2338 | ||
2339 | /* Return the containing section of virtual section SECTION. */ | |
2340 | ||
2341 | static struct dwarf2_section_info * | |
2342 | get_containing_section (const struct dwarf2_section_info *section) | |
2343 | { | |
2344 | gdb_assert (section->is_virtual); | |
2345 | return section->s.containing_section; | |
c906108c SS |
2346 | } |
2347 | ||
a32a8923 DE |
2348 | /* Return the bfd owner of SECTION. */ |
2349 | ||
2350 | static struct bfd * | |
2351 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2352 | { | |
73869dc2 DE |
2353 | if (section->is_virtual) |
2354 | { | |
2355 | section = get_containing_section (section); | |
2356 | gdb_assert (!section->is_virtual); | |
2357 | } | |
049412e3 | 2358 | return section->s.section->owner; |
a32a8923 DE |
2359 | } |
2360 | ||
2361 | /* Return the bfd section of SECTION. | |
2362 | Returns NULL if the section is not present. */ | |
2363 | ||
2364 | static asection * | |
2365 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2366 | { | |
73869dc2 DE |
2367 | if (section->is_virtual) |
2368 | { | |
2369 | section = get_containing_section (section); | |
2370 | gdb_assert (!section->is_virtual); | |
2371 | } | |
049412e3 | 2372 | return section->s.section; |
a32a8923 DE |
2373 | } |
2374 | ||
2375 | /* Return the name of SECTION. */ | |
2376 | ||
2377 | static const char * | |
2378 | get_section_name (const struct dwarf2_section_info *section) | |
2379 | { | |
2380 | asection *sectp = get_section_bfd_section (section); | |
2381 | ||
2382 | gdb_assert (sectp != NULL); | |
2383 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2384 | } | |
2385 | ||
2386 | /* Return the name of the file SECTION is in. */ | |
2387 | ||
2388 | static const char * | |
2389 | get_section_file_name (const struct dwarf2_section_info *section) | |
2390 | { | |
2391 | bfd *abfd = get_section_bfd_owner (section); | |
2392 | ||
2393 | return bfd_get_filename (abfd); | |
2394 | } | |
2395 | ||
2396 | /* Return the id of SECTION. | |
2397 | Returns 0 if SECTION doesn't exist. */ | |
2398 | ||
2399 | static int | |
2400 | get_section_id (const struct dwarf2_section_info *section) | |
2401 | { | |
2402 | asection *sectp = get_section_bfd_section (section); | |
2403 | ||
2404 | if (sectp == NULL) | |
2405 | return 0; | |
2406 | return sectp->id; | |
2407 | } | |
2408 | ||
2409 | /* Return the flags of SECTION. | |
73869dc2 | 2410 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2411 | |
2412 | static int | |
2413 | get_section_flags (const struct dwarf2_section_info *section) | |
2414 | { | |
2415 | asection *sectp = get_section_bfd_section (section); | |
2416 | ||
2417 | gdb_assert (sectp != NULL); | |
2418 | return bfd_get_section_flags (sectp->owner, sectp); | |
2419 | } | |
2420 | ||
251d32d9 TG |
2421 | /* When loading sections, we look either for uncompressed section or for |
2422 | compressed section names. */ | |
233a11ab CS |
2423 | |
2424 | static int | |
251d32d9 TG |
2425 | section_is_p (const char *section_name, |
2426 | const struct dwarf2_section_names *names) | |
233a11ab | 2427 | { |
251d32d9 TG |
2428 | if (names->normal != NULL |
2429 | && strcmp (section_name, names->normal) == 0) | |
2430 | return 1; | |
2431 | if (names->compressed != NULL | |
2432 | && strcmp (section_name, names->compressed) == 0) | |
2433 | return 1; | |
2434 | return 0; | |
233a11ab CS |
2435 | } |
2436 | ||
330cdd98 | 2437 | /* See declaration. */ |
c906108c | 2438 | |
330cdd98 PA |
2439 | void |
2440 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2441 | const dwarf2_debug_sections &names) | |
c906108c | 2442 | { |
dc7650b8 | 2443 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2444 | |
dc7650b8 JK |
2445 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2446 | { | |
2447 | } | |
330cdd98 | 2448 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2449 | { |
330cdd98 PA |
2450 | this->info.s.section = sectp; |
2451 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2452 | } |
330cdd98 | 2453 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2454 | { |
330cdd98 PA |
2455 | this->abbrev.s.section = sectp; |
2456 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2457 | } |
330cdd98 | 2458 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2459 | { |
330cdd98 PA |
2460 | this->line.s.section = sectp; |
2461 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2462 | } |
330cdd98 | 2463 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2464 | { |
330cdd98 PA |
2465 | this->loc.s.section = sectp; |
2466 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2467 | } |
330cdd98 | 2468 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2469 | { |
330cdd98 PA |
2470 | this->loclists.s.section = sectp; |
2471 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2472 | } |
330cdd98 | 2473 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2474 | { |
330cdd98 PA |
2475 | this->macinfo.s.section = sectp; |
2476 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2477 | } |
330cdd98 | 2478 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2479 | { |
330cdd98 PA |
2480 | this->macro.s.section = sectp; |
2481 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2482 | } |
330cdd98 | 2483 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2484 | { |
330cdd98 PA |
2485 | this->str.s.section = sectp; |
2486 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2487 | } |
330cdd98 | 2488 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2489 | { |
330cdd98 PA |
2490 | this->line_str.s.section = sectp; |
2491 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2492 | } |
330cdd98 | 2493 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2494 | { |
330cdd98 PA |
2495 | this->addr.s.section = sectp; |
2496 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2497 | } |
330cdd98 | 2498 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2499 | { |
330cdd98 PA |
2500 | this->frame.s.section = sectp; |
2501 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2502 | } |
330cdd98 | 2503 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2504 | { |
330cdd98 PA |
2505 | this->eh_frame.s.section = sectp; |
2506 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2507 | } |
330cdd98 | 2508 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2509 | { |
330cdd98 PA |
2510 | this->ranges.s.section = sectp; |
2511 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2512 | } |
330cdd98 | 2513 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2514 | { |
330cdd98 PA |
2515 | this->rnglists.s.section = sectp; |
2516 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2517 | } |
330cdd98 | 2518 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2519 | { |
8b70b953 TT |
2520 | struct dwarf2_section_info type_section; |
2521 | ||
2522 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2523 | type_section.s.section = sectp; |
8b70b953 TT |
2524 | type_section.size = bfd_get_section_size (sectp); |
2525 | ||
330cdd98 | 2526 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2527 | &type_section); |
348e048f | 2528 | } |
330cdd98 | 2529 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2530 | { |
330cdd98 PA |
2531 | this->gdb_index.s.section = sectp; |
2532 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2533 | } |
dce234bc | 2534 | |
b4e1fd61 | 2535 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2536 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2537 | this->has_section_at_zero = true; |
c906108c SS |
2538 | } |
2539 | ||
fceca515 DE |
2540 | /* A helper function that decides whether a section is empty, |
2541 | or not present. */ | |
9e0ac564 TT |
2542 | |
2543 | static int | |
19ac8c2e | 2544 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2545 | { |
73869dc2 DE |
2546 | if (section->is_virtual) |
2547 | return section->size == 0; | |
049412e3 | 2548 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2549 | } |
2550 | ||
3019eac3 DE |
2551 | /* Read the contents of the section INFO. |
2552 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2553 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2554 | of the DWO file. | |
dce234bc | 2555 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2556 | |
dce234bc PP |
2557 | static void |
2558 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2559 | { |
a32a8923 | 2560 | asection *sectp; |
3019eac3 | 2561 | bfd *abfd; |
dce234bc | 2562 | gdb_byte *buf, *retbuf; |
c906108c | 2563 | |
be391dca TT |
2564 | if (info->readin) |
2565 | return; | |
dce234bc | 2566 | info->buffer = NULL; |
be391dca | 2567 | info->readin = 1; |
188dd5d6 | 2568 | |
9e0ac564 | 2569 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2570 | return; |
c906108c | 2571 | |
a32a8923 | 2572 | sectp = get_section_bfd_section (info); |
3019eac3 | 2573 | |
73869dc2 DE |
2574 | /* If this is a virtual section we need to read in the real one first. */ |
2575 | if (info->is_virtual) | |
2576 | { | |
2577 | struct dwarf2_section_info *containing_section = | |
2578 | get_containing_section (info); | |
2579 | ||
2580 | gdb_assert (sectp != NULL); | |
2581 | if ((sectp->flags & SEC_RELOC) != 0) | |
2582 | { | |
2583 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2584 | " supported in section %s [in module %s]"), | |
2585 | get_section_name (info), get_section_file_name (info)); | |
2586 | } | |
2587 | dwarf2_read_section (objfile, containing_section); | |
2588 | /* Other code should have already caught virtual sections that don't | |
2589 | fit. */ | |
2590 | gdb_assert (info->virtual_offset + info->size | |
2591 | <= containing_section->size); | |
2592 | /* If the real section is empty or there was a problem reading the | |
2593 | section we shouldn't get here. */ | |
2594 | gdb_assert (containing_section->buffer != NULL); | |
2595 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2596 | return; | |
2597 | } | |
2598 | ||
4bf44c1c TT |
2599 | /* If the section has relocations, we must read it ourselves. |
2600 | Otherwise we attach it to the BFD. */ | |
2601 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2602 | { |
d521ce57 | 2603 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2604 | return; |
dce234bc | 2605 | } |
dce234bc | 2606 | |
224c3ddb | 2607 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2608 | info->buffer = buf; |
dce234bc PP |
2609 | |
2610 | /* When debugging .o files, we may need to apply relocations; see | |
2611 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2612 | We never compress sections in .o files, so we only need to | |
2613 | try this when the section is not compressed. */ | |
ac8035ab | 2614 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2615 | if (retbuf != NULL) |
2616 | { | |
2617 | info->buffer = retbuf; | |
2618 | return; | |
2619 | } | |
2620 | ||
a32a8923 DE |
2621 | abfd = get_section_bfd_owner (info); |
2622 | gdb_assert (abfd != NULL); | |
2623 | ||
dce234bc PP |
2624 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2625 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2626 | { |
2627 | error (_("Dwarf Error: Can't read DWARF data" | |
2628 | " in section %s [in module %s]"), | |
2629 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2630 | } | |
dce234bc PP |
2631 | } |
2632 | ||
9e0ac564 TT |
2633 | /* A helper function that returns the size of a section in a safe way. |
2634 | If you are positive that the section has been read before using the | |
2635 | size, then it is safe to refer to the dwarf2_section_info object's | |
2636 | "size" field directly. In other cases, you must call this | |
2637 | function, because for compressed sections the size field is not set | |
2638 | correctly until the section has been read. */ | |
2639 | ||
2640 | static bfd_size_type | |
2641 | dwarf2_section_size (struct objfile *objfile, | |
2642 | struct dwarf2_section_info *info) | |
2643 | { | |
2644 | if (!info->readin) | |
2645 | dwarf2_read_section (objfile, info); | |
2646 | return info->size; | |
2647 | } | |
2648 | ||
dce234bc | 2649 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2650 | SECTION_NAME. */ |
af34e669 | 2651 | |
dce234bc | 2652 | void |
3017a003 TG |
2653 | dwarf2_get_section_info (struct objfile *objfile, |
2654 | enum dwarf2_section_enum sect, | |
d521ce57 | 2655 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2656 | bfd_size_type *sizep) |
2657 | { | |
2658 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2659 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2660 | dwarf2_objfile_data_key); | |
dce234bc | 2661 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2662 | |
2663 | /* We may see an objfile without any DWARF, in which case we just | |
2664 | return nothing. */ | |
2665 | if (data == NULL) | |
2666 | { | |
2667 | *sectp = NULL; | |
2668 | *bufp = NULL; | |
2669 | *sizep = 0; | |
2670 | return; | |
2671 | } | |
3017a003 TG |
2672 | switch (sect) |
2673 | { | |
2674 | case DWARF2_DEBUG_FRAME: | |
2675 | info = &data->frame; | |
2676 | break; | |
2677 | case DWARF2_EH_FRAME: | |
2678 | info = &data->eh_frame; | |
2679 | break; | |
2680 | default: | |
2681 | gdb_assert_not_reached ("unexpected section"); | |
2682 | } | |
dce234bc | 2683 | |
9e0ac564 | 2684 | dwarf2_read_section (objfile, info); |
dce234bc | 2685 | |
a32a8923 | 2686 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2687 | *bufp = info->buffer; |
2688 | *sizep = info->size; | |
2689 | } | |
2690 | ||
36586728 TT |
2691 | /* A helper function to find the sections for a .dwz file. */ |
2692 | ||
2693 | static void | |
2694 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2695 | { | |
9a3c8263 | 2696 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2697 | |
2698 | /* Note that we only support the standard ELF names, because .dwz | |
2699 | is ELF-only (at the time of writing). */ | |
2700 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2701 | { | |
049412e3 | 2702 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2703 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2704 | } | |
2705 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2706 | { | |
049412e3 | 2707 | dwz_file->info.s.section = sectp; |
36586728 TT |
2708 | dwz_file->info.size = bfd_get_section_size (sectp); |
2709 | } | |
2710 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2711 | { | |
049412e3 | 2712 | dwz_file->str.s.section = sectp; |
36586728 TT |
2713 | dwz_file->str.size = bfd_get_section_size (sectp); |
2714 | } | |
2715 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2716 | { | |
049412e3 | 2717 | dwz_file->line.s.section = sectp; |
36586728 TT |
2718 | dwz_file->line.size = bfd_get_section_size (sectp); |
2719 | } | |
2720 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2721 | { | |
049412e3 | 2722 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2723 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2724 | } | |
2ec9a5e0 TT |
2725 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2726 | { | |
049412e3 | 2727 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2728 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2729 | } | |
36586728 TT |
2730 | } |
2731 | ||
4db1a1dc TT |
2732 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2733 | there is no .gnu_debugaltlink section in the file. Error if there | |
2734 | is such a section but the file cannot be found. */ | |
36586728 TT |
2735 | |
2736 | static struct dwz_file * | |
2737 | dwarf2_get_dwz_file (void) | |
2738 | { | |
36586728 TT |
2739 | const char *filename; |
2740 | struct dwz_file *result; | |
acd13123 | 2741 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2742 | size_t buildid_len; |
2743 | bfd_byte *buildid; | |
36586728 TT |
2744 | |
2745 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2746 | return dwarf2_per_objfile->dwz_file; | |
2747 | ||
4db1a1dc | 2748 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2749 | gdb::unique_xmalloc_ptr<char> data |
2750 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2751 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2752 | if (data == NULL) |
2753 | { | |
2754 | if (bfd_get_error () == bfd_error_no_error) | |
2755 | return NULL; | |
2756 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2757 | bfd_errmsg (bfd_get_error ())); | |
2758 | } | |
791afaa2 TT |
2759 | |
2760 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2761 | |
acd13123 TT |
2762 | buildid_len = (size_t) buildid_len_arg; |
2763 | ||
791afaa2 | 2764 | filename = data.get (); |
d721ba37 PA |
2765 | |
2766 | std::string abs_storage; | |
36586728 TT |
2767 | if (!IS_ABSOLUTE_PATH (filename)) |
2768 | { | |
14278e1f TT |
2769 | gdb::unique_xmalloc_ptr<char> abs |
2770 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2771 | |
14278e1f | 2772 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2773 | filename = abs_storage.c_str (); |
36586728 TT |
2774 | } |
2775 | ||
dc294be5 TT |
2776 | /* First try the file name given in the section. If that doesn't |
2777 | work, try to use the build-id instead. */ | |
192b62ce | 2778 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2779 | if (dwz_bfd != NULL) |
36586728 | 2780 | { |
192b62ce TT |
2781 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2782 | dwz_bfd.release (); | |
36586728 TT |
2783 | } |
2784 | ||
dc294be5 TT |
2785 | if (dwz_bfd == NULL) |
2786 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2787 | ||
2788 | if (dwz_bfd == NULL) | |
2789 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2790 | objfile_name (dwarf2_per_objfile->objfile)); | |
2791 | ||
36586728 TT |
2792 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2793 | struct dwz_file); | |
192b62ce | 2794 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2795 | |
192b62ce | 2796 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 | 2797 | |
192b62ce | 2798 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2799 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2800 | return result; |
2801 | } | |
9291a0cd | 2802 | \f |
7b9f3c50 DE |
2803 | /* DWARF quick_symbols_functions support. */ |
2804 | ||
2805 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2806 | unique line tables, so we maintain a separate table of all .debug_line | |
2807 | derived entries to support the sharing. | |
2808 | All the quick functions need is the list of file names. We discard the | |
2809 | line_header when we're done and don't need to record it here. */ | |
2810 | struct quick_file_names | |
2811 | { | |
094b34ac DE |
2812 | /* The data used to construct the hash key. */ |
2813 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2814 | |
2815 | /* The number of entries in file_names, real_names. */ | |
2816 | unsigned int num_file_names; | |
2817 | ||
2818 | /* The file names from the line table, after being run through | |
2819 | file_full_name. */ | |
2820 | const char **file_names; | |
2821 | ||
2822 | /* The file names from the line table after being run through | |
2823 | gdb_realpath. These are computed lazily. */ | |
2824 | const char **real_names; | |
2825 | }; | |
2826 | ||
2827 | /* When using the index (and thus not using psymtabs), each CU has an | |
2828 | object of this type. This is used to hold information needed by | |
2829 | the various "quick" methods. */ | |
2830 | struct dwarf2_per_cu_quick_data | |
2831 | { | |
2832 | /* The file table. This can be NULL if there was no file table | |
2833 | or it's currently not read in. | |
2834 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2835 | struct quick_file_names *file_names; | |
2836 | ||
2837 | /* The corresponding symbol table. This is NULL if symbols for this | |
2838 | CU have not yet been read. */ | |
43f3e411 | 2839 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2840 | |
2841 | /* A temporary mark bit used when iterating over all CUs in | |
2842 | expand_symtabs_matching. */ | |
2843 | unsigned int mark : 1; | |
2844 | ||
2845 | /* True if we've tried to read the file table and found there isn't one. | |
2846 | There will be no point in trying to read it again next time. */ | |
2847 | unsigned int no_file_data : 1; | |
2848 | }; | |
2849 | ||
094b34ac DE |
2850 | /* Utility hash function for a stmt_list_hash. */ |
2851 | ||
2852 | static hashval_t | |
2853 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2854 | { | |
2855 | hashval_t v = 0; | |
2856 | ||
2857 | if (stmt_list_hash->dwo_unit != NULL) | |
2858 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2859 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2860 | return v; |
2861 | } | |
2862 | ||
2863 | /* Utility equality function for a stmt_list_hash. */ | |
2864 | ||
2865 | static int | |
2866 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2867 | const struct stmt_list_hash *rhs) | |
2868 | { | |
2869 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2870 | return 0; | |
2871 | if (lhs->dwo_unit != NULL | |
2872 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2873 | return 0; | |
2874 | ||
9c541725 | 2875 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2876 | } |
2877 | ||
7b9f3c50 DE |
2878 | /* Hash function for a quick_file_names. */ |
2879 | ||
2880 | static hashval_t | |
2881 | hash_file_name_entry (const void *e) | |
2882 | { | |
9a3c8263 SM |
2883 | const struct quick_file_names *file_data |
2884 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2885 | |
094b34ac | 2886 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2887 | } |
2888 | ||
2889 | /* Equality function for a quick_file_names. */ | |
2890 | ||
2891 | static int | |
2892 | eq_file_name_entry (const void *a, const void *b) | |
2893 | { | |
9a3c8263 SM |
2894 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2895 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2896 | |
094b34ac | 2897 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2898 | } |
2899 | ||
2900 | /* Delete function for a quick_file_names. */ | |
2901 | ||
2902 | static void | |
2903 | delete_file_name_entry (void *e) | |
2904 | { | |
9a3c8263 | 2905 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2906 | int i; |
2907 | ||
2908 | for (i = 0; i < file_data->num_file_names; ++i) | |
2909 | { | |
2910 | xfree ((void*) file_data->file_names[i]); | |
2911 | if (file_data->real_names) | |
2912 | xfree ((void*) file_data->real_names[i]); | |
2913 | } | |
2914 | ||
2915 | /* The space for the struct itself lives on objfile_obstack, | |
2916 | so we don't free it here. */ | |
2917 | } | |
2918 | ||
2919 | /* Create a quick_file_names hash table. */ | |
2920 | ||
2921 | static htab_t | |
2922 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2923 | { | |
2924 | return htab_create_alloc (nr_initial_entries, | |
2925 | hash_file_name_entry, eq_file_name_entry, | |
2926 | delete_file_name_entry, xcalloc, xfree); | |
2927 | } | |
9291a0cd | 2928 | |
918dd910 JK |
2929 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2930 | have to be created afterwards. You should call age_cached_comp_units after | |
2931 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2932 | ||
2933 | static void | |
2934 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2935 | { | |
3019eac3 | 2936 | if (per_cu->is_debug_types) |
e5fe5e75 | 2937 | load_full_type_unit (per_cu); |
918dd910 | 2938 | else |
95554aad | 2939 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2940 | |
cc12ce38 DE |
2941 | if (per_cu->cu == NULL) |
2942 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2943 | |
2944 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2945 | } |
2946 | ||
a0f42c21 | 2947 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2948 | |
9291a0cd | 2949 | static void |
a0f42c21 | 2950 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2951 | { |
2952 | struct cleanup *back_to; | |
2953 | ||
f4dc4d17 DE |
2954 | /* Skip type_unit_groups, reading the type units they contain |
2955 | is handled elsewhere. */ | |
2956 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2957 | return; | |
2958 | ||
9291a0cd TT |
2959 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2960 | ||
95554aad | 2961 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2962 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2963 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2964 | { | |
2965 | queue_comp_unit (per_cu, language_minimal); | |
2966 | load_cu (per_cu); | |
89e63ee4 DE |
2967 | |
2968 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2969 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2970 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2971 | if (!per_cu->is_debug_types | |
cc12ce38 | 2972 | && per_cu->cu != NULL |
89e63ee4 DE |
2973 | && per_cu->cu->dwo_unit != NULL |
2974 | && dwarf2_per_objfile->index_table != NULL | |
2975 | && dwarf2_per_objfile->index_table->version <= 7 | |
2976 | /* DWP files aren't supported yet. */ | |
2977 | && get_dwp_file () == NULL) | |
2978 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2979 | } |
9291a0cd | 2980 | |
a0f42c21 | 2981 | process_queue (); |
9291a0cd TT |
2982 | |
2983 | /* Age the cache, releasing compilation units that have not | |
2984 | been used recently. */ | |
2985 | age_cached_comp_units (); | |
2986 | ||
2987 | do_cleanups (back_to); | |
2988 | } | |
2989 | ||
2990 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2991 | the objfile from which this CU came. Returns the resulting symbol | |
2992 | table. */ | |
2fdf6df6 | 2993 | |
43f3e411 | 2994 | static struct compunit_symtab * |
a0f42c21 | 2995 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2996 | { |
95554aad | 2997 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2998 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2999 | { |
3000 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 3001 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 3002 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 3003 | process_cu_includes (); |
9291a0cd TT |
3004 | do_cleanups (back_to); |
3005 | } | |
f194fefb | 3006 | |
43f3e411 | 3007 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
3008 | } |
3009 | ||
8832e7e3 | 3010 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
3011 | |
3012 | This is intended for loops like: | |
3013 | ||
3014 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
3015 | + dwarf2_per_objfile->n_type_units); ++i) | |
3016 | { | |
8832e7e3 | 3017 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
3018 | |
3019 | ...; | |
3020 | } | |
3021 | */ | |
2fdf6df6 | 3022 | |
1fd400ff | 3023 | static struct dwarf2_per_cu_data * |
8832e7e3 | 3024 | dw2_get_cutu (int index) |
1fd400ff TT |
3025 | { |
3026 | if (index >= dwarf2_per_objfile->n_comp_units) | |
3027 | { | |
f4dc4d17 | 3028 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
3029 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
3030 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
3031 | } |
3032 | ||
3033 | return dwarf2_per_objfile->all_comp_units[index]; | |
3034 | } | |
3035 | ||
8832e7e3 DE |
3036 | /* Return the CU given its index. |
3037 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
3038 | refers to a CU. */ | |
f4dc4d17 DE |
3039 | |
3040 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 3041 | dw2_get_cu (int index) |
f4dc4d17 | 3042 | { |
8832e7e3 | 3043 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 3044 | |
1fd400ff TT |
3045 | return dwarf2_per_objfile->all_comp_units[index]; |
3046 | } | |
3047 | ||
2ec9a5e0 TT |
3048 | /* A helper for create_cus_from_index that handles a given list of |
3049 | CUs. */ | |
2fdf6df6 | 3050 | |
74a0d9f6 | 3051 | static void |
2ec9a5e0 TT |
3052 | create_cus_from_index_list (struct objfile *objfile, |
3053 | const gdb_byte *cu_list, offset_type n_elements, | |
3054 | struct dwarf2_section_info *section, | |
3055 | int is_dwz, | |
3056 | int base_offset) | |
9291a0cd TT |
3057 | { |
3058 | offset_type i; | |
9291a0cd | 3059 | |
2ec9a5e0 | 3060 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3061 | { |
74a0d9f6 | 3062 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3063 | |
3064 | sect_offset sect_off | |
3065 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3066 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3067 | cu_list += 2 * 8; |
3068 | ||
9c541725 PA |
3069 | dwarf2_per_cu_data *the_cu |
3070 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3071 | struct dwarf2_per_cu_data); | |
3072 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3073 | the_cu->length = length; |
3074 | the_cu->objfile = objfile; | |
8a0459fd | 3075 | the_cu->section = section; |
9291a0cd TT |
3076 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3077 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3078 | the_cu->is_dwz = is_dwz; |
3079 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3080 | } |
9291a0cd TT |
3081 | } |
3082 | ||
2ec9a5e0 | 3083 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3084 | the CU objects for this objfile. */ |
2ec9a5e0 | 3085 | |
74a0d9f6 | 3086 | static void |
2ec9a5e0 TT |
3087 | create_cus_from_index (struct objfile *objfile, |
3088 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3089 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3090 | { | |
3091 | struct dwz_file *dwz; | |
3092 | ||
3093 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3094 | dwarf2_per_objfile->all_comp_units = |
3095 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3096 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3097 | |
74a0d9f6 JK |
3098 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3099 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3100 | |
3101 | if (dwz_elements == 0) | |
74a0d9f6 | 3102 | return; |
2ec9a5e0 TT |
3103 | |
3104 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3105 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3106 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3107 | } |
3108 | ||
1fd400ff | 3109 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3110 | |
74a0d9f6 | 3111 | static void |
673bfd45 | 3112 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3113 | struct dwarf2_section_info *section, |
673bfd45 DE |
3114 | const gdb_byte *bytes, |
3115 | offset_type elements) | |
1fd400ff TT |
3116 | { |
3117 | offset_type i; | |
673bfd45 | 3118 | htab_t sig_types_hash; |
1fd400ff | 3119 | |
6aa5f3a6 DE |
3120 | dwarf2_per_objfile->n_type_units |
3121 | = dwarf2_per_objfile->n_allocated_type_units | |
3122 | = elements / 3; | |
8d749320 SM |
3123 | dwarf2_per_objfile->all_type_units = |
3124 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3125 | |
673bfd45 | 3126 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3127 | |
3128 | for (i = 0; i < elements; i += 3) | |
3129 | { | |
52dc124a | 3130 | struct signatured_type *sig_type; |
9c541725 | 3131 | ULONGEST signature; |
1fd400ff | 3132 | void **slot; |
9c541725 | 3133 | cu_offset type_offset_in_tu; |
1fd400ff | 3134 | |
74a0d9f6 | 3135 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3136 | sect_offset sect_off |
3137 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3138 | type_offset_in_tu | |
3139 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3140 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3141 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3142 | bytes += 3 * 8; | |
3143 | ||
52dc124a | 3144 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3145 | struct signatured_type); |
52dc124a | 3146 | sig_type->signature = signature; |
9c541725 | 3147 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3148 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3149 | sig_type->per_cu.section = section; |
9c541725 | 3150 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3151 | sig_type->per_cu.objfile = objfile; |
3152 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3153 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3154 | struct dwarf2_per_cu_quick_data); | |
3155 | ||
52dc124a DE |
3156 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3157 | *slot = sig_type; | |
1fd400ff | 3158 | |
b4dd5633 | 3159 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3160 | } |
3161 | ||
673bfd45 | 3162 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3163 | } |
3164 | ||
9291a0cd TT |
3165 | /* Read the address map data from the mapped index, and use it to |
3166 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3167 | |
9291a0cd TT |
3168 | static void |
3169 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3170 | { | |
3e29f34a | 3171 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3172 | const gdb_byte *iter, *end; |
9291a0cd | 3173 | struct addrmap *mutable_map; |
9291a0cd TT |
3174 | CORE_ADDR baseaddr; |
3175 | ||
8268c778 PA |
3176 | auto_obstack temp_obstack; |
3177 | ||
9291a0cd TT |
3178 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3179 | ||
3180 | iter = index->address_table; | |
3181 | end = iter + index->address_table_size; | |
3182 | ||
3183 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3184 | ||
3185 | while (iter < end) | |
3186 | { | |
3187 | ULONGEST hi, lo, cu_index; | |
3188 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3189 | iter += 8; | |
3190 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3191 | iter += 8; | |
3192 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3193 | iter += 4; | |
f652bce2 | 3194 | |
24a55014 | 3195 | if (lo > hi) |
f652bce2 | 3196 | { |
24a55014 DE |
3197 | complaint (&symfile_complaints, |
3198 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3199 | hex_string (lo), hex_string (hi)); |
24a55014 | 3200 | continue; |
f652bce2 | 3201 | } |
24a55014 DE |
3202 | |
3203 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3204 | { |
3205 | complaint (&symfile_complaints, | |
3206 | _(".gdb_index address table has invalid CU number %u"), | |
3207 | (unsigned) cu_index); | |
24a55014 | 3208 | continue; |
f652bce2 | 3209 | } |
24a55014 | 3210 | |
3e29f34a MR |
3211 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3212 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3213 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3214 | } |
3215 | ||
3216 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3217 | &objfile->objfile_obstack); | |
9291a0cd TT |
3218 | } |
3219 | ||
59d7bcaf JK |
3220 | /* The hash function for strings in the mapped index. This is the same as |
3221 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3222 | implementation. This is necessary because the hash function is tied to the | |
3223 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3224 | SYMBOL_HASH_NEXT. |
3225 | ||
3226 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3227 | |
9291a0cd | 3228 | static hashval_t |
559a7a62 | 3229 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3230 | { |
3231 | const unsigned char *str = (const unsigned char *) p; | |
3232 | hashval_t r = 0; | |
3233 | unsigned char c; | |
3234 | ||
3235 | while ((c = *str++) != 0) | |
559a7a62 JK |
3236 | { |
3237 | if (index_version >= 5) | |
3238 | c = tolower (c); | |
3239 | r = r * 67 + c - 113; | |
3240 | } | |
9291a0cd TT |
3241 | |
3242 | return r; | |
3243 | } | |
3244 | ||
3245 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3246 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3247 | constant pool and return true. If NAME cannot be found, return |
3248 | false. */ | |
2fdf6df6 | 3249 | |
109483d9 | 3250 | static bool |
9291a0cd TT |
3251 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3252 | offset_type **vec_out) | |
3253 | { | |
0cf03b49 | 3254 | offset_type hash; |
9291a0cd | 3255 | offset_type slot, step; |
559a7a62 | 3256 | int (*cmp) (const char *, const char *); |
9291a0cd | 3257 | |
791afaa2 | 3258 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3259 | if (current_language->la_language == language_cplus |
45280282 IB |
3260 | || current_language->la_language == language_fortran |
3261 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3262 | { |
3263 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3264 | not contain any. */ | |
a8719064 | 3265 | |
72998fb3 | 3266 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3267 | { |
109483d9 | 3268 | without_params = cp_remove_params (name); |
0cf03b49 | 3269 | |
72998fb3 | 3270 | if (without_params != NULL) |
791afaa2 | 3271 | name = without_params.get (); |
0cf03b49 JK |
3272 | } |
3273 | } | |
3274 | ||
559a7a62 | 3275 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3276 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3277 | simulate our NAME being searched is also lowercased. */ |
3278 | hash = mapped_index_string_hash ((index->version == 4 | |
3279 | && case_sensitivity == case_sensitive_off | |
3280 | ? 5 : index->version), | |
3281 | name); | |
3282 | ||
3876f04e DE |
3283 | slot = hash & (index->symbol_table_slots - 1); |
3284 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3285 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3286 | |
3287 | for (;;) | |
3288 | { | |
3289 | /* Convert a slot number to an offset into the table. */ | |
3290 | offset_type i = 2 * slot; | |
3291 | const char *str; | |
3876f04e | 3292 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
109483d9 | 3293 | return false; |
9291a0cd | 3294 | |
3876f04e | 3295 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3296 | if (!cmp (name, str)) |
9291a0cd TT |
3297 | { |
3298 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3299 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
109483d9 | 3300 | return true; |
9291a0cd TT |
3301 | } |
3302 | ||
3876f04e | 3303 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3304 | } |
3305 | } | |
3306 | ||
2ec9a5e0 TT |
3307 | /* A helper function that reads the .gdb_index from SECTION and fills |
3308 | in MAP. FILENAME is the name of the file containing the section; | |
3309 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3310 | ok to use deprecated sections. | |
3311 | ||
3312 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3313 | out parameters that are filled in with information about the CU and | |
3314 | TU lists in the section. | |
3315 | ||
3316 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3317 | |
9291a0cd | 3318 | static int |
2ec9a5e0 TT |
3319 | read_index_from_section (struct objfile *objfile, |
3320 | const char *filename, | |
3321 | int deprecated_ok, | |
3322 | struct dwarf2_section_info *section, | |
3323 | struct mapped_index *map, | |
3324 | const gdb_byte **cu_list, | |
3325 | offset_type *cu_list_elements, | |
3326 | const gdb_byte **types_list, | |
3327 | offset_type *types_list_elements) | |
9291a0cd | 3328 | { |
948f8e3d | 3329 | const gdb_byte *addr; |
2ec9a5e0 | 3330 | offset_type version; |
b3b272e1 | 3331 | offset_type *metadata; |
1fd400ff | 3332 | int i; |
9291a0cd | 3333 | |
2ec9a5e0 | 3334 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3335 | return 0; |
82430852 JK |
3336 | |
3337 | /* Older elfutils strip versions could keep the section in the main | |
3338 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3339 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3340 | return 0; |
3341 | ||
2ec9a5e0 | 3342 | dwarf2_read_section (objfile, section); |
9291a0cd | 3343 | |
2ec9a5e0 | 3344 | addr = section->buffer; |
9291a0cd | 3345 | /* Version check. */ |
1fd400ff | 3346 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3347 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3348 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3349 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3350 | indices. */ |
831adc1f | 3351 | if (version < 4) |
481860b3 GB |
3352 | { |
3353 | static int warning_printed = 0; | |
3354 | if (!warning_printed) | |
3355 | { | |
3356 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3357 | filename); |
481860b3 GB |
3358 | warning_printed = 1; |
3359 | } | |
3360 | return 0; | |
3361 | } | |
3362 | /* Index version 4 uses a different hash function than index version | |
3363 | 5 and later. | |
3364 | ||
3365 | Versions earlier than 6 did not emit psymbols for inlined | |
3366 | functions. Using these files will cause GDB not to be able to | |
3367 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3368 | indices unless the user has done |
3369 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3370 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3371 | { |
3372 | static int warning_printed = 0; | |
3373 | if (!warning_printed) | |
3374 | { | |
e615022a DE |
3375 | warning (_("\ |
3376 | Skipping deprecated .gdb_index section in %s.\n\ | |
3377 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3378 | to use the section anyway."), | |
2ec9a5e0 | 3379 | filename); |
481860b3 GB |
3380 | warning_printed = 1; |
3381 | } | |
3382 | return 0; | |
3383 | } | |
796a7ff8 | 3384 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3385 | of the TU (for symbols coming from TUs), |
3386 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3387 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3388 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3389 | These are just performance bugs, and we can't distinguish gdb-generated | |
3390 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3391 | |
481860b3 | 3392 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3393 | longer backward compatible. */ |
796a7ff8 | 3394 | if (version > 8) |
594e8718 | 3395 | return 0; |
9291a0cd | 3396 | |
559a7a62 | 3397 | map->version = version; |
2ec9a5e0 | 3398 | map->total_size = section->size; |
9291a0cd TT |
3399 | |
3400 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3401 | |
3402 | i = 0; | |
2ec9a5e0 TT |
3403 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3404 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3405 | / 8); | |
1fd400ff TT |
3406 | ++i; |
3407 | ||
2ec9a5e0 TT |
3408 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3409 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3410 | - MAYBE_SWAP (metadata[i])) | |
3411 | / 8); | |
987d643c | 3412 | ++i; |
1fd400ff TT |
3413 | |
3414 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3415 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3416 | - MAYBE_SWAP (metadata[i])); | |
3417 | ++i; | |
3418 | ||
3876f04e DE |
3419 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3420 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3421 | - MAYBE_SWAP (metadata[i])) | |
3422 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3423 | ++i; |
9291a0cd | 3424 | |
f9d83a0b | 3425 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3426 | |
2ec9a5e0 TT |
3427 | return 1; |
3428 | } | |
3429 | ||
3430 | ||
3431 | /* Read the index file. If everything went ok, initialize the "quick" | |
3432 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3433 | ||
3434 | static int | |
3435 | dwarf2_read_index (struct objfile *objfile) | |
3436 | { | |
3437 | struct mapped_index local_map, *map; | |
3438 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3439 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3440 | struct dwz_file *dwz; |
2ec9a5e0 | 3441 | |
4262abfb | 3442 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3443 | use_deprecated_index_sections, |
3444 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3445 | &cu_list, &cu_list_elements, | |
3446 | &types_list, &types_list_elements)) | |
3447 | return 0; | |
3448 | ||
0fefef59 | 3449 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3450 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3451 | return 0; |
3452 | ||
2ec9a5e0 TT |
3453 | /* If there is a .dwz file, read it so we can get its CU list as |
3454 | well. */ | |
4db1a1dc TT |
3455 | dwz = dwarf2_get_dwz_file (); |
3456 | if (dwz != NULL) | |
2ec9a5e0 | 3457 | { |
2ec9a5e0 TT |
3458 | struct mapped_index dwz_map; |
3459 | const gdb_byte *dwz_types_ignore; | |
3460 | offset_type dwz_types_elements_ignore; | |
3461 | ||
3462 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3463 | 1, | |
3464 | &dwz->gdb_index, &dwz_map, | |
3465 | &dwz_list, &dwz_list_elements, | |
3466 | &dwz_types_ignore, | |
3467 | &dwz_types_elements_ignore)) | |
3468 | { | |
3469 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3470 | bfd_get_filename (dwz->dwz_bfd)); | |
3471 | return 0; | |
3472 | } | |
3473 | } | |
3474 | ||
74a0d9f6 JK |
3475 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3476 | dwz_list_elements); | |
1fd400ff | 3477 | |
8b70b953 TT |
3478 | if (types_list_elements) |
3479 | { | |
3480 | struct dwarf2_section_info *section; | |
3481 | ||
3482 | /* We can only handle a single .debug_types when we have an | |
3483 | index. */ | |
3484 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3485 | return 0; | |
3486 | ||
3487 | section = VEC_index (dwarf2_section_info_def, | |
3488 | dwarf2_per_objfile->types, 0); | |
3489 | ||
74a0d9f6 JK |
3490 | create_signatured_type_table_from_index (objfile, section, types_list, |
3491 | types_list_elements); | |
8b70b953 | 3492 | } |
9291a0cd | 3493 | |
2ec9a5e0 TT |
3494 | create_addrmap_from_index (objfile, &local_map); |
3495 | ||
8d749320 | 3496 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
3f563c84 | 3497 | map = new (map) mapped_index (); |
2ec9a5e0 | 3498 | *map = local_map; |
9291a0cd TT |
3499 | |
3500 | dwarf2_per_objfile->index_table = map; | |
3501 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3502 | dwarf2_per_objfile->quick_file_names_table = |
3503 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3504 | |
3505 | return 1; | |
3506 | } | |
3507 | ||
3508 | /* A helper for the "quick" functions which sets the global | |
3509 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3510 | |
9291a0cd TT |
3511 | static void |
3512 | dw2_setup (struct objfile *objfile) | |
3513 | { | |
9a3c8263 SM |
3514 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3515 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3516 | gdb_assert (dwarf2_per_objfile); |
3517 | } | |
3518 | ||
dee91e82 | 3519 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3520 | |
dee91e82 DE |
3521 | static void |
3522 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3523 | const gdb_byte *info_ptr, |
dee91e82 DE |
3524 | struct die_info *comp_unit_die, |
3525 | int has_children, | |
3526 | void *data) | |
9291a0cd | 3527 | { |
dee91e82 DE |
3528 | struct dwarf2_cu *cu = reader->cu; |
3529 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3530 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3531 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3532 | struct attribute *attr; |
dee91e82 | 3533 | int i; |
7b9f3c50 DE |
3534 | void **slot; |
3535 | struct quick_file_names *qfn; | |
9291a0cd | 3536 | |
0186c6a7 DE |
3537 | gdb_assert (! this_cu->is_debug_types); |
3538 | ||
07261596 TT |
3539 | /* Our callers never want to match partial units -- instead they |
3540 | will match the enclosing full CU. */ | |
3541 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3542 | { | |
3543 | this_cu->v.quick->no_file_data = 1; | |
3544 | return; | |
3545 | } | |
3546 | ||
0186c6a7 | 3547 | lh_cu = this_cu; |
7b9f3c50 | 3548 | slot = NULL; |
dee91e82 | 3549 | |
fff8551c | 3550 | line_header_up lh; |
9c541725 | 3551 | sect_offset line_offset {}; |
fff8551c | 3552 | |
dee91e82 | 3553 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3554 | if (attr) |
3555 | { | |
7b9f3c50 DE |
3556 | struct quick_file_names find_entry; |
3557 | ||
9c541725 | 3558 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3559 | |
3560 | /* We may have already read in this line header (TU line header sharing). | |
3561 | If we have we're done. */ | |
094b34ac | 3562 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3563 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3564 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3565 | &find_entry, INSERT); | |
3566 | if (*slot != NULL) | |
3567 | { | |
9a3c8263 | 3568 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3569 | return; |
7b9f3c50 DE |
3570 | } |
3571 | ||
3019eac3 | 3572 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3573 | } |
3574 | if (lh == NULL) | |
3575 | { | |
094b34ac | 3576 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3577 | return; |
9291a0cd TT |
3578 | } |
3579 | ||
8d749320 | 3580 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3581 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3582 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3583 | gdb_assert (slot != NULL); |
3584 | *slot = qfn; | |
9291a0cd | 3585 | |
d721ba37 | 3586 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3587 | |
fff8551c | 3588 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3589 | qfn->file_names = |
fff8551c PA |
3590 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3591 | for (i = 0; i < lh->file_names.size (); ++i) | |
3592 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3593 | qfn->real_names = NULL; |
9291a0cd | 3594 | |
094b34ac | 3595 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3596 | } |
3597 | ||
3598 | /* A helper for the "quick" functions which attempts to read the line | |
3599 | table for THIS_CU. */ | |
3600 | ||
3601 | static struct quick_file_names * | |
e4a48d9d | 3602 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3603 | { |
0186c6a7 DE |
3604 | /* This should never be called for TUs. */ |
3605 | gdb_assert (! this_cu->is_debug_types); | |
3606 | /* Nor type unit groups. */ | |
3607 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3608 | |
dee91e82 DE |
3609 | if (this_cu->v.quick->file_names != NULL) |
3610 | return this_cu->v.quick->file_names; | |
3611 | /* If we know there is no line data, no point in looking again. */ | |
3612 | if (this_cu->v.quick->no_file_data) | |
3613 | return NULL; | |
3614 | ||
0186c6a7 | 3615 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3616 | |
3617 | if (this_cu->v.quick->no_file_data) | |
3618 | return NULL; | |
3619 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3620 | } |
3621 | ||
3622 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3623 | real path for a given file name from the line table. */ |
2fdf6df6 | 3624 | |
9291a0cd | 3625 | static const char * |
7b9f3c50 DE |
3626 | dw2_get_real_path (struct objfile *objfile, |
3627 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3628 | { |
7b9f3c50 DE |
3629 | if (qfn->real_names == NULL) |
3630 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3631 | qfn->num_file_names, const char *); |
9291a0cd | 3632 | |
7b9f3c50 | 3633 | if (qfn->real_names[index] == NULL) |
14278e1f | 3634 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3635 | |
7b9f3c50 | 3636 | return qfn->real_names[index]; |
9291a0cd TT |
3637 | } |
3638 | ||
3639 | static struct symtab * | |
3640 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3641 | { | |
43f3e411 | 3642 | struct compunit_symtab *cust; |
9291a0cd | 3643 | int index; |
ae2de4f8 | 3644 | |
9291a0cd TT |
3645 | dw2_setup (objfile); |
3646 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3647 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3648 | if (cust == NULL) | |
3649 | return NULL; | |
3650 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3651 | } |
3652 | ||
7b9f3c50 DE |
3653 | /* Traversal function for dw2_forget_cached_source_info. */ |
3654 | ||
3655 | static int | |
3656 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3657 | { |
7b9f3c50 | 3658 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3659 | |
7b9f3c50 | 3660 | if (file_data->real_names) |
9291a0cd | 3661 | { |
7b9f3c50 | 3662 | int i; |
9291a0cd | 3663 | |
7b9f3c50 | 3664 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3665 | { |
7b9f3c50 DE |
3666 | xfree ((void*) file_data->real_names[i]); |
3667 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3668 | } |
3669 | } | |
7b9f3c50 DE |
3670 | |
3671 | return 1; | |
3672 | } | |
3673 | ||
3674 | static void | |
3675 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3676 | { | |
3677 | dw2_setup (objfile); | |
3678 | ||
3679 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3680 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3681 | } |
3682 | ||
f8eba3c6 TT |
3683 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3684 | the symtabs and calls the iterator. */ | |
3685 | ||
3686 | static int | |
3687 | dw2_map_expand_apply (struct objfile *objfile, | |
3688 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3689 | const char *name, const char *real_path, |
14bc53a8 | 3690 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3691 | { |
43f3e411 | 3692 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3693 | |
3694 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3695 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3696 | return 0; |
3697 | ||
3698 | /* This may expand more than one symtab, and we want to iterate over | |
3699 | all of them. */ | |
a0f42c21 | 3700 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3701 | |
14bc53a8 PA |
3702 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3703 | last_made, callback); | |
f8eba3c6 TT |
3704 | } |
3705 | ||
3706 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3707 | ||
14bc53a8 PA |
3708 | static bool |
3709 | dw2_map_symtabs_matching_filename | |
3710 | (struct objfile *objfile, const char *name, const char *real_path, | |
3711 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3712 | { |
3713 | int i; | |
c011a4f4 | 3714 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3715 | |
3716 | dw2_setup (objfile); | |
ae2de4f8 | 3717 | |
848e3e78 DE |
3718 | /* The rule is CUs specify all the files, including those used by |
3719 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3720 | |
848e3e78 | 3721 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3722 | { |
3723 | int j; | |
8832e7e3 | 3724 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3725 | struct quick_file_names *file_data; |
9291a0cd | 3726 | |
3d7bb9d9 | 3727 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3728 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3729 | continue; |
3730 | ||
e4a48d9d | 3731 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3732 | if (file_data == NULL) |
9291a0cd TT |
3733 | continue; |
3734 | ||
7b9f3c50 | 3735 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3736 | { |
7b9f3c50 | 3737 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3738 | const char *this_real_name; |
9291a0cd | 3739 | |
af529f8f | 3740 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3741 | { |
f5b95b50 | 3742 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3743 | callback)) |
3744 | return true; | |
288e77a7 | 3745 | continue; |
4aac40c8 | 3746 | } |
9291a0cd | 3747 | |
c011a4f4 DE |
3748 | /* Before we invoke realpath, which can get expensive when many |
3749 | files are involved, do a quick comparison of the basenames. */ | |
3750 | if (! basenames_may_differ | |
3751 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3752 | continue; | |
3753 | ||
da235a7c JK |
3754 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3755 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3756 | { |
da235a7c | 3757 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3758 | callback)) |
3759 | return true; | |
288e77a7 | 3760 | continue; |
da235a7c | 3761 | } |
9291a0cd | 3762 | |
da235a7c JK |
3763 | if (real_path != NULL) |
3764 | { | |
af529f8f JK |
3765 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3766 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3767 | if (this_real_name != NULL |
af529f8f | 3768 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3769 | { |
f5b95b50 | 3770 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3771 | callback)) |
3772 | return true; | |
288e77a7 | 3773 | continue; |
9291a0cd TT |
3774 | } |
3775 | } | |
3776 | } | |
3777 | } | |
3778 | ||
14bc53a8 | 3779 | return false; |
9291a0cd TT |
3780 | } |
3781 | ||
da51c347 DE |
3782 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3783 | ||
3784 | struct dw2_symtab_iterator | |
9291a0cd | 3785 | { |
da51c347 DE |
3786 | /* The internalized form of .gdb_index. */ |
3787 | struct mapped_index *index; | |
3788 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3789 | int want_specific_block; | |
3790 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3791 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3792 | int block_index; | |
3793 | /* The kind of symbol we're looking for. */ | |
3794 | domain_enum domain; | |
3795 | /* The list of CUs from the index entry of the symbol, | |
3796 | or NULL if not found. */ | |
3797 | offset_type *vec; | |
3798 | /* The next element in VEC to look at. */ | |
3799 | int next; | |
3800 | /* The number of elements in VEC, or zero if there is no match. */ | |
3801 | int length; | |
8943b874 DE |
3802 | /* Have we seen a global version of the symbol? |
3803 | If so we can ignore all further global instances. | |
3804 | This is to work around gold/15646, inefficient gold-generated | |
3805 | indices. */ | |
3806 | int global_seen; | |
da51c347 | 3807 | }; |
9291a0cd | 3808 | |
da51c347 DE |
3809 | /* Initialize the index symtab iterator ITER. |
3810 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3811 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3812 | |
9291a0cd | 3813 | static void |
da51c347 DE |
3814 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3815 | struct mapped_index *index, | |
3816 | int want_specific_block, | |
3817 | int block_index, | |
3818 | domain_enum domain, | |
3819 | const char *name) | |
3820 | { | |
3821 | iter->index = index; | |
3822 | iter->want_specific_block = want_specific_block; | |
3823 | iter->block_index = block_index; | |
3824 | iter->domain = domain; | |
3825 | iter->next = 0; | |
8943b874 | 3826 | iter->global_seen = 0; |
da51c347 DE |
3827 | |
3828 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3829 | iter->length = MAYBE_SWAP (*iter->vec); | |
3830 | else | |
3831 | { | |
3832 | iter->vec = NULL; | |
3833 | iter->length = 0; | |
3834 | } | |
3835 | } | |
3836 | ||
3837 | /* Return the next matching CU or NULL if there are no more. */ | |
3838 | ||
3839 | static struct dwarf2_per_cu_data * | |
3840 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3841 | { | |
3842 | for ( ; iter->next < iter->length; ++iter->next) | |
3843 | { | |
3844 | offset_type cu_index_and_attrs = | |
3845 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3846 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3847 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3848 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3849 | /* This value is only valid for index versions >= 7. */ | |
3850 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3851 | gdb_index_symbol_kind symbol_kind = | |
3852 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3853 | /* Only check the symbol attributes if they're present. | |
3854 | Indices prior to version 7 don't record them, | |
3855 | and indices >= 7 may elide them for certain symbols | |
3856 | (gold does this). */ | |
3857 | int attrs_valid = | |
3858 | (iter->index->version >= 7 | |
3859 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3860 | ||
3190f0c6 DE |
3861 | /* Don't crash on bad data. */ |
3862 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3863 | + dwarf2_per_objfile->n_type_units)) | |
3864 | { | |
3865 | complaint (&symfile_complaints, | |
3866 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3867 | " [in module %s]"), |
3868 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3869 | continue; |
3870 | } | |
3871 | ||
8832e7e3 | 3872 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3873 | |
da51c347 | 3874 | /* Skip if already read in. */ |
43f3e411 | 3875 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3876 | continue; |
3877 | ||
8943b874 DE |
3878 | /* Check static vs global. */ |
3879 | if (attrs_valid) | |
3880 | { | |
3881 | if (iter->want_specific_block | |
3882 | && want_static != is_static) | |
3883 | continue; | |
3884 | /* Work around gold/15646. */ | |
3885 | if (!is_static && iter->global_seen) | |
3886 | continue; | |
3887 | if (!is_static) | |
3888 | iter->global_seen = 1; | |
3889 | } | |
da51c347 DE |
3890 | |
3891 | /* Only check the symbol's kind if it has one. */ | |
3892 | if (attrs_valid) | |
3893 | { | |
3894 | switch (iter->domain) | |
3895 | { | |
3896 | case VAR_DOMAIN: | |
3897 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3898 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3899 | /* Some types are also in VAR_DOMAIN. */ | |
3900 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3901 | continue; | |
3902 | break; | |
3903 | case STRUCT_DOMAIN: | |
3904 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3905 | continue; | |
3906 | break; | |
3907 | case LABEL_DOMAIN: | |
3908 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3909 | continue; | |
3910 | break; | |
3911 | default: | |
3912 | break; | |
3913 | } | |
3914 | } | |
3915 | ||
3916 | ++iter->next; | |
3917 | return per_cu; | |
3918 | } | |
3919 | ||
3920 | return NULL; | |
3921 | } | |
3922 | ||
43f3e411 | 3923 | static struct compunit_symtab * |
da51c347 DE |
3924 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3925 | const char *name, domain_enum domain) | |
9291a0cd | 3926 | { |
43f3e411 | 3927 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3928 | struct mapped_index *index; |
3929 | ||
9291a0cd TT |
3930 | dw2_setup (objfile); |
3931 | ||
b5ec771e PA |
3932 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3933 | ||
156942c7 DE |
3934 | index = dwarf2_per_objfile->index_table; |
3935 | ||
da51c347 | 3936 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3937 | if (index) |
9291a0cd | 3938 | { |
da51c347 DE |
3939 | struct dw2_symtab_iterator iter; |
3940 | struct dwarf2_per_cu_data *per_cu; | |
3941 | ||
3942 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3943 | |
da51c347 | 3944 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3945 | { |
b2e2f908 | 3946 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3947 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3948 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3949 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3950 | |
b2e2f908 DE |
3951 | sym = block_find_symbol (block, name, domain, |
3952 | block_find_non_opaque_type_preferred, | |
3953 | &with_opaque); | |
3954 | ||
da51c347 DE |
3955 | /* Some caution must be observed with overloaded functions |
3956 | and methods, since the index will not contain any overload | |
3957 | information (but NAME might contain it). */ | |
da51c347 | 3958 | |
b2e2f908 | 3959 | if (sym != NULL |
b5ec771e | 3960 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
b2e2f908 DE |
3961 | return stab; |
3962 | if (with_opaque != NULL | |
b5ec771e | 3963 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
b2e2f908 | 3964 | stab_best = stab; |
da51c347 DE |
3965 | |
3966 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3967 | } |
3968 | } | |
9291a0cd | 3969 | |
da51c347 | 3970 | return stab_best; |
9291a0cd TT |
3971 | } |
3972 | ||
3973 | static void | |
3974 | dw2_print_stats (struct objfile *objfile) | |
3975 | { | |
e4a48d9d | 3976 | int i, total, count; |
9291a0cd TT |
3977 | |
3978 | dw2_setup (objfile); | |
e4a48d9d | 3979 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3980 | count = 0; |
e4a48d9d | 3981 | for (i = 0; i < total; ++i) |
9291a0cd | 3982 | { |
8832e7e3 | 3983 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3984 | |
43f3e411 | 3985 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3986 | ++count; |
3987 | } | |
e4a48d9d | 3988 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3989 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3990 | } | |
3991 | ||
779bd270 DE |
3992 | /* This dumps minimal information about the index. |
3993 | It is called via "mt print objfiles". | |
3994 | One use is to verify .gdb_index has been loaded by the | |
3995 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3996 | ||
9291a0cd TT |
3997 | static void |
3998 | dw2_dump (struct objfile *objfile) | |
3999 | { | |
779bd270 DE |
4000 | dw2_setup (objfile); |
4001 | gdb_assert (dwarf2_per_objfile->using_index); | |
4002 | printf_filtered (".gdb_index:"); | |
4003 | if (dwarf2_per_objfile->index_table != NULL) | |
4004 | { | |
4005 | printf_filtered (" version %d\n", | |
4006 | dwarf2_per_objfile->index_table->version); | |
4007 | } | |
4008 | else | |
4009 | printf_filtered (" faked for \"readnow\"\n"); | |
4010 | printf_filtered ("\n"); | |
9291a0cd TT |
4011 | } |
4012 | ||
4013 | static void | |
3189cb12 DE |
4014 | dw2_relocate (struct objfile *objfile, |
4015 | const struct section_offsets *new_offsets, | |
4016 | const struct section_offsets *delta) | |
9291a0cd TT |
4017 | { |
4018 | /* There's nothing to relocate here. */ | |
4019 | } | |
4020 | ||
4021 | static void | |
4022 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4023 | const char *func_name) | |
4024 | { | |
da51c347 DE |
4025 | struct mapped_index *index; |
4026 | ||
4027 | dw2_setup (objfile); | |
4028 | ||
4029 | index = dwarf2_per_objfile->index_table; | |
4030 | ||
4031 | /* index is NULL if OBJF_READNOW. */ | |
4032 | if (index) | |
4033 | { | |
4034 | struct dw2_symtab_iterator iter; | |
4035 | struct dwarf2_per_cu_data *per_cu; | |
4036 | ||
4037 | /* Note: It doesn't matter what we pass for block_index here. */ | |
4038 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
4039 | func_name); | |
4040 | ||
4041 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
4042 | dw2_instantiate_symtab (per_cu); | |
4043 | } | |
9291a0cd TT |
4044 | } |
4045 | ||
4046 | static void | |
4047 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4048 | { | |
4049 | int i; | |
4050 | ||
4051 | dw2_setup (objfile); | |
1fd400ff TT |
4052 | |
4053 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4054 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4055 | { |
8832e7e3 | 4056 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4057 | |
a0f42c21 | 4058 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4059 | } |
4060 | } | |
4061 | ||
4062 | static void | |
652a8996 JK |
4063 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4064 | const char *fullname) | |
9291a0cd TT |
4065 | { |
4066 | int i; | |
4067 | ||
4068 | dw2_setup (objfile); | |
d4637a04 DE |
4069 | |
4070 | /* We don't need to consider type units here. | |
4071 | This is only called for examining code, e.g. expand_line_sal. | |
4072 | There can be an order of magnitude (or more) more type units | |
4073 | than comp units, and we avoid them if we can. */ | |
4074 | ||
4075 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4076 | { |
4077 | int j; | |
8832e7e3 | 4078 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4079 | struct quick_file_names *file_data; |
9291a0cd | 4080 | |
3d7bb9d9 | 4081 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4082 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4083 | continue; |
4084 | ||
e4a48d9d | 4085 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4086 | if (file_data == NULL) |
9291a0cd TT |
4087 | continue; |
4088 | ||
7b9f3c50 | 4089 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4090 | { |
652a8996 JK |
4091 | const char *this_fullname = file_data->file_names[j]; |
4092 | ||
4093 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4094 | { |
a0f42c21 | 4095 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4096 | break; |
4097 | } | |
4098 | } | |
4099 | } | |
4100 | } | |
4101 | ||
9291a0cd | 4102 | static void |
ade7ed9e | 4103 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4104 | const char * name, domain_enum domain, |
ade7ed9e | 4105 | int global, |
40658b94 PH |
4106 | int (*callback) (struct block *, |
4107 | struct symbol *, void *), | |
b5ec771e | 4108 | void *data, symbol_name_match_type match, |
2edb89d3 | 4109 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4110 | { |
40658b94 | 4111 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4112 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4113 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4114 | } |
4115 | ||
b5ec771e PA |
4116 | /* Symbol name matcher for .gdb_index names. |
4117 | ||
4118 | Symbol names in .gdb_index have a few particularities: | |
4119 | ||
4120 | - There's no indication of which is the language of each symbol. | |
4121 | ||
4122 | Since each language has its own symbol name matching algorithm, | |
4123 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4124 | each symbol against all languages. This would be a potential |
4125 | performance problem if it were not mitigated by the | |
4126 | mapped_index::name_components lookup table, which significantly | |
4127 | reduces the number of times we need to call into this matcher, | |
4128 | making it a non-issue. | |
b5ec771e PA |
4129 | |
4130 | - Symbol names in the index have no overload (parameter) | |
4131 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4132 | appear as "foo" in the index, for example. | |
4133 | ||
4134 | This means that the lookup names passed to the symbol name | |
4135 | matcher functions must have no parameter information either | |
4136 | because (e.g.) symbol search name "foo" does not match | |
4137 | lookup-name "foo(int)" [while swapping search name for lookup | |
4138 | name would match]. | |
4139 | */ | |
4140 | class gdb_index_symbol_name_matcher | |
4141 | { | |
4142 | public: | |
4143 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4144 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4145 | ||
4146 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4147 | Returns true if any matcher matches. */ | |
4148 | bool matches (const char *symbol_name); | |
4149 | ||
4150 | private: | |
4151 | /* A reference to the lookup name we're matching against. */ | |
4152 | const lookup_name_info &m_lookup_name; | |
4153 | ||
4154 | /* A vector holding all the different symbol name matchers, for all | |
4155 | languages. */ | |
4156 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4157 | }; | |
4158 | ||
4159 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4160 | (const lookup_name_info &lookup_name) | |
4161 | : m_lookup_name (lookup_name) | |
4162 | { | |
4163 | /* Prepare the vector of comparison functions upfront, to avoid | |
4164 | doing the same work for each symbol. Care is taken to avoid | |
4165 | matching with the same matcher more than once if/when multiple | |
4166 | languages use the same matcher function. */ | |
4167 | auto &matchers = m_symbol_name_matcher_funcs; | |
4168 | matchers.reserve (nr_languages); | |
4169 | ||
4170 | matchers.push_back (default_symbol_name_matcher); | |
4171 | ||
4172 | for (int i = 0; i < nr_languages; i++) | |
4173 | { | |
4174 | const language_defn *lang = language_def ((enum language) i); | |
4175 | if (lang->la_get_symbol_name_matcher != NULL) | |
4176 | { | |
4177 | symbol_name_matcher_ftype *name_matcher | |
4178 | = lang->la_get_symbol_name_matcher (m_lookup_name); | |
4179 | ||
4180 | /* Don't insert the same comparison routine more than once. | |
4181 | Note that we do this linear walk instead of a cheaper | |
4182 | sorted insert, or use a std::set or something like that, | |
4183 | because relative order of function addresses is not | |
4184 | stable. This is not a problem in practice because the | |
4185 | number of supported languages is low, and the cost here | |
4186 | is tiny compared to the number of searches we'll do | |
4187 | afterwards using this object. */ | |
4188 | if (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4189 | == matchers.end ()) | |
4190 | matchers.push_back (name_matcher); | |
4191 | } | |
4192 | } | |
4193 | } | |
4194 | ||
4195 | bool | |
4196 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4197 | { | |
4198 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4199 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4200 | return true; | |
4201 | ||
4202 | return false; | |
4203 | } | |
4204 | ||
e1ef7d7a PA |
4205 | /* Starting from a search name, return the string that finds the upper |
4206 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4207 | list. Returns the empty string to indicate that the upper bound is | |
4208 | the end of the list. */ | |
4209 | ||
4210 | static std::string | |
4211 | make_sort_after_prefix_name (const char *search_name) | |
4212 | { | |
4213 | /* When looking to complete "func", we find the upper bound of all | |
4214 | symbols that start with "func" by looking for where we'd insert | |
4215 | the closest string that would follow "func" in lexicographical | |
4216 | order. Usually, that's "func"-with-last-character-incremented, | |
4217 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4218 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4219 | Especially mind the 0xff character, which is a valid character in | |
4220 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4221 | rule out compilers allowing it in identifiers. Note that | |
4222 | conveniently, strcmp/strcasecmp are specified to compare | |
4223 | characters interpreted as unsigned char. So what we do is treat | |
4224 | the whole string as a base 256 number composed of a sequence of | |
4225 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4226 | to 0, and carries 1 to the following more-significant position. | |
4227 | If the very first character in SEARCH_NAME ends up incremented | |
4228 | and carries/overflows, then the upper bound is the end of the | |
4229 | list. The string after the empty string is also the empty | |
4230 | string. | |
4231 | ||
4232 | Some examples of this operation: | |
4233 | ||
4234 | SEARCH_NAME => "+1" RESULT | |
4235 | ||
4236 | "abc" => "abd" | |
4237 | "ab\xff" => "ac" | |
4238 | "\xff" "a" "\xff" => "\xff" "b" | |
4239 | "\xff" => "" | |
4240 | "\xff\xff" => "" | |
4241 | "" => "" | |
4242 | ||
4243 | Then, with these symbols for example: | |
4244 | ||
4245 | func | |
4246 | func1 | |
4247 | fund | |
4248 | ||
4249 | completing "func" looks for symbols between "func" and | |
4250 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4251 | which finds "func" and "func1", but not "fund". | |
4252 | ||
4253 | And with: | |
4254 | ||
4255 | funcÿ (Latin1 'ÿ' [0xff]) | |
4256 | funcÿ1 | |
4257 | fund | |
4258 | ||
4259 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4260 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4261 | ||
4262 | And with: | |
4263 | ||
4264 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4265 | ÿÿ1 | |
4266 | ||
4267 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4268 | the end of the list. | |
4269 | */ | |
4270 | std::string after = search_name; | |
4271 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4272 | after.pop_back (); | |
4273 | if (!after.empty ()) | |
4274 | after.back () = (unsigned char) after.back () + 1; | |
4275 | return after; | |
4276 | } | |
4277 | ||
5c58de74 | 4278 | /* See declaration. */ |
61d96d7e | 4279 | |
5c58de74 PA |
4280 | std::pair<std::vector<name_component>::const_iterator, |
4281 | std::vector<name_component>::const_iterator> | |
4282 | mapped_index::find_name_components_bounds | |
4283 | (const lookup_name_info &lookup_name_without_params) const | |
3f563c84 | 4284 | { |
5c58de74 PA |
4285 | auto *name_cmp |
4286 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 PA |
4287 | |
4288 | const char *cplus | |
c62446b1 | 4289 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4290 | |
3f563c84 PA |
4291 | /* Comparison function object for lower_bound that matches against a |
4292 | given symbol name. */ | |
4293 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4294 | const char *name) | |
4295 | { | |
5c58de74 | 4296 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4297 | const char *elem_name = elem_qualified + elem.name_offset; |
4298 | return name_cmp (elem_name, name) < 0; | |
4299 | }; | |
4300 | ||
4301 | /* Comparison function object for upper_bound that matches against a | |
4302 | given symbol name. */ | |
4303 | auto lookup_compare_upper = [&] (const char *name, | |
4304 | const name_component &elem) | |
4305 | { | |
5c58de74 | 4306 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4307 | const char *elem_name = elem_qualified + elem.name_offset; |
4308 | return name_cmp (name, elem_name) < 0; | |
4309 | }; | |
4310 | ||
5c58de74 PA |
4311 | auto begin = this->name_components.begin (); |
4312 | auto end = this->name_components.end (); | |
3f563c84 PA |
4313 | |
4314 | /* Find the lower bound. */ | |
4315 | auto lower = [&] () | |
4316 | { | |
5c58de74 | 4317 | if (lookup_name_without_params.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4318 | return begin; |
4319 | else | |
4320 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4321 | } (); | |
4322 | ||
4323 | /* Find the upper bound. */ | |
4324 | auto upper = [&] () | |
4325 | { | |
5c58de74 | 4326 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4327 | { |
e1ef7d7a PA |
4328 | /* In completion mode, we want UPPER to point past all |
4329 | symbols names that have the same prefix. I.e., with | |
4330 | these symbols, and completing "func": | |
4331 | ||
4332 | function << lower bound | |
4333 | function1 | |
4334 | other_function << upper bound | |
4335 | ||
4336 | We find the upper bound by looking for the insertion | |
4337 | point of "func"-with-last-character-incremented, | |
4338 | i.e. "fund". */ | |
4339 | std::string after = make_sort_after_prefix_name (cplus); | |
4340 | if (after.empty ()) | |
3f563c84 | 4341 | return end; |
e6b2f5ef PA |
4342 | return std::lower_bound (lower, end, after.c_str (), |
4343 | lookup_compare_lower); | |
3f563c84 PA |
4344 | } |
4345 | else | |
4346 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4347 | } (); | |
4348 | ||
5c58de74 PA |
4349 | return {lower, upper}; |
4350 | } | |
4351 | ||
4352 | /* See declaration. */ | |
4353 | ||
4354 | void | |
4355 | mapped_index::build_name_components () | |
4356 | { | |
4357 | if (!this->name_components.empty ()) | |
4358 | return; | |
4359 | ||
4360 | this->name_components_casing = case_sensitivity; | |
4361 | auto *name_cmp | |
4362 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4363 | ||
4364 | /* The code below only knows how to break apart components of C++ | |
4365 | symbol names (and other languages that use '::' as | |
4366 | namespace/module separator). If we add support for wild matching | |
4367 | to some language that uses some other operator (E.g., Ada, Go and | |
4368 | D use '.'), then we'll need to try splitting the symbol name | |
4369 | according to that language too. Note that Ada does support wild | |
4370 | matching, but doesn't currently support .gdb_index. */ | |
4371 | for (size_t iter = 0; iter < this->symbol_table_slots; ++iter) | |
4372 | { | |
4373 | offset_type idx = 2 * iter; | |
4374 | ||
4375 | if (this->symbol_table[idx] == 0 | |
4376 | && this->symbol_table[idx + 1] == 0) | |
4377 | continue; | |
4378 | ||
4379 | const char *name = this->symbol_name_at (idx); | |
4380 | ||
4381 | /* Add each name component to the name component table. */ | |
4382 | unsigned int previous_len = 0; | |
4383 | for (unsigned int current_len = cp_find_first_component (name); | |
4384 | name[current_len] != '\0'; | |
4385 | current_len += cp_find_first_component (name + current_len)) | |
4386 | { | |
4387 | gdb_assert (name[current_len] == ':'); | |
4388 | this->name_components.push_back ({previous_len, idx}); | |
4389 | /* Skip the '::'. */ | |
4390 | current_len += 2; | |
4391 | previous_len = current_len; | |
4392 | } | |
4393 | this->name_components.push_back ({previous_len, idx}); | |
4394 | } | |
4395 | ||
4396 | /* Sort name_components elements by name. */ | |
4397 | auto name_comp_compare = [&] (const name_component &left, | |
4398 | const name_component &right) | |
4399 | { | |
4400 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4401 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4402 | ||
4403 | const char *left_name = left_qualified + left.name_offset; | |
4404 | const char *right_name = right_qualified + right.name_offset; | |
4405 | ||
4406 | return name_cmp (left_name, right_name) < 0; | |
4407 | }; | |
4408 | ||
4409 | std::sort (this->name_components.begin (), | |
4410 | this->name_components.end (), | |
4411 | name_comp_compare); | |
4412 | } | |
4413 | ||
4414 | /* Helper for dw2_expand_symtabs_matching that works with a | |
4415 | mapped_index instead of the containing objfile. This is split to a | |
4416 | separate function in order to be able to unit test the | |
4417 | name_components matching using a mock mapped_index. For each | |
4418 | symbol name that matches, calls MATCH_CALLBACK, passing it the | |
4419 | symbol's index in the mapped_index symbol table. */ | |
4420 | ||
4421 | static void | |
4422 | dw2_expand_symtabs_matching_symbol | |
4423 | (mapped_index &index, | |
4424 | const lookup_name_info &lookup_name_in, | |
4425 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4426 | enum search_domain kind, | |
4427 | gdb::function_view<void (offset_type)> match_callback) | |
4428 | { | |
4429 | lookup_name_info lookup_name_without_params | |
4430 | = lookup_name_in.make_ignore_params (); | |
4431 | gdb_index_symbol_name_matcher lookup_name_matcher | |
4432 | (lookup_name_without_params); | |
4433 | ||
4434 | /* Build the symbol name component sorted vector, if we haven't | |
4435 | yet. */ | |
4436 | index.build_name_components (); | |
4437 | ||
4438 | auto bounds = index.find_name_components_bounds (lookup_name_without_params); | |
4439 | ||
3f563c84 PA |
4440 | /* Now for each symbol name in range, check to see if we have a name |
4441 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4442 | ||
4443 | /* The same symbol may appear more than once in the range though. | |
4444 | E.g., if we're looking for symbols that complete "w", and we have | |
4445 | a symbol named "w1::w2", we'll find the two name components for | |
4446 | that same symbol in the range. To be sure we only call the | |
4447 | callback once per symbol, we first collect the symbol name | |
4448 | indexes that matched in a temporary vector and ignore | |
4449 | duplicates. */ | |
4450 | std::vector<offset_type> matches; | |
5c58de74 | 4451 | matches.reserve (std::distance (bounds.first, bounds.second)); |
3f563c84 | 4452 | |
5c58de74 | 4453 | for (; bounds.first != bounds.second; ++bounds.first) |
3f563c84 | 4454 | { |
5c58de74 | 4455 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
3f563c84 PA |
4456 | |
4457 | if (!lookup_name_matcher.matches (qualified) | |
4458 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4459 | continue; |
4460 | ||
5c58de74 | 4461 | matches.push_back (bounds.first->idx); |
3f563c84 PA |
4462 | } |
4463 | ||
4464 | std::sort (matches.begin (), matches.end ()); | |
4465 | ||
4466 | /* Finally call the callback, once per match. */ | |
4467 | ULONGEST prev = -1; | |
4468 | for (offset_type idx : matches) | |
4469 | { | |
4470 | if (prev != idx) | |
4471 | { | |
4472 | match_callback (idx); | |
4473 | prev = idx; | |
4474 | } | |
4475 | } | |
4476 | ||
4477 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4478 | (offset_type)-1 are both possible values. */ | |
4479 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4480 | } | |
4481 | ||
c62446b1 PA |
4482 | #if GDB_SELF_TEST |
4483 | ||
4484 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4485 | ||
4486 | /* A wrapper around mapped_index that builds a mock mapped_index, from | |
4487 | the symbol list passed as parameter to the constructor. */ | |
4488 | class mock_mapped_index | |
4489 | { | |
4490 | public: | |
4491 | template<size_t N> | |
4492 | mock_mapped_index (const char *(&symbols)[N]) | |
4493 | : mock_mapped_index (symbols, N) | |
4494 | {} | |
4495 | ||
4496 | /* Access the built index. */ | |
4497 | mapped_index &index () | |
4498 | { return m_index; } | |
4499 | ||
4500 | /* Disable copy. */ | |
4501 | mock_mapped_index(const mock_mapped_index &) = delete; | |
4502 | void operator= (const mock_mapped_index &) = delete; | |
4503 | ||
4504 | private: | |
4505 | mock_mapped_index (const char **symbols, size_t symbols_size) | |
4506 | { | |
4507 | /* No string can live at offset zero. Add a dummy entry. */ | |
4508 | obstack_grow_str0 (&m_constant_pool, ""); | |
4509 | ||
4510 | for (size_t i = 0; i < symbols_size; i++) | |
4511 | { | |
4512 | const char *sym = symbols[i]; | |
4513 | size_t offset = obstack_object_size (&m_constant_pool); | |
4514 | obstack_grow_str0 (&m_constant_pool, sym); | |
4515 | m_symbol_table.push_back (offset); | |
4516 | m_symbol_table.push_back (0); | |
4517 | }; | |
4518 | ||
4519 | m_index.constant_pool = (const char *) obstack_base (&m_constant_pool); | |
4520 | m_index.symbol_table = m_symbol_table.data (); | |
4521 | m_index.symbol_table_slots = m_symbol_table.size () / 2; | |
4522 | } | |
4523 | ||
4524 | public: | |
4525 | /* The built mapped_index. */ | |
4526 | mapped_index m_index{}; | |
4527 | ||
4528 | /* The storage that the built mapped_index uses for symbol and | |
4529 | constant pool tables. */ | |
4530 | std::vector<offset_type> m_symbol_table; | |
4531 | auto_obstack m_constant_pool; | |
4532 | }; | |
4533 | ||
4534 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4535 | string, to pass to print routines. */ | |
4536 | ||
4537 | static const char * | |
4538 | string_or_null (const char *str) | |
4539 | { | |
4540 | return str != NULL ? str : "<null>"; | |
4541 | } | |
4542 | ||
4543 | /* Check if a lookup_name_info built from | |
4544 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4545 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4546 | matching order. If no match expected, then an empty list is | |
4547 | specified. Returns true on success. On failure prints a warning | |
4548 | indicating the file:line that failed, and returns false. */ | |
4549 | ||
4550 | static bool | |
4551 | check_match (const char *file, int line, | |
4552 | mock_mapped_index &mock_index, | |
4553 | const char *name, symbol_name_match_type match_type, | |
4554 | bool completion_mode, | |
4555 | std::initializer_list<const char *> expected_list) | |
4556 | { | |
4557 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4558 | ||
4559 | bool matched = true; | |
4560 | ||
4561 | auto mismatch = [&] (const char *expected_str, | |
4562 | const char *got) | |
4563 | { | |
4564 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4565 | "expected=\"%s\", got=\"%s\"\n"), | |
4566 | file, line, | |
4567 | (match_type == symbol_name_match_type::FULL | |
4568 | ? "FULL" : "WILD"), | |
4569 | name, string_or_null (expected_str), string_or_null (got)); | |
4570 | matched = false; | |
4571 | }; | |
4572 | ||
4573 | auto expected_it = expected_list.begin (); | |
4574 | auto expected_end = expected_list.end (); | |
4575 | ||
4576 | dw2_expand_symtabs_matching_symbol (mock_index.index (), lookup_name, | |
4577 | NULL, ALL_DOMAIN, | |
4578 | [&] (offset_type idx) | |
4579 | { | |
4580 | const char *matched_name = mock_index.index ().symbol_name_at (idx); | |
4581 | const char *expected_str | |
4582 | = expected_it == expected_end ? NULL : *expected_it++; | |
4583 | ||
4584 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4585 | mismatch (expected_str, matched_name); | |
4586 | }); | |
4587 | ||
4588 | const char *expected_str | |
4589 | = expected_it == expected_end ? NULL : *expected_it++; | |
4590 | if (expected_str != NULL) | |
4591 | mismatch (expected_str, NULL); | |
4592 | ||
4593 | return matched; | |
4594 | } | |
4595 | ||
4596 | /* The symbols added to the mock mapped_index for testing (in | |
4597 | canonical form). */ | |
4598 | static const char *test_symbols[] = { | |
4599 | "function", | |
4600 | "std::bar", | |
4601 | "std::zfunction", | |
4602 | "std::zfunction2", | |
4603 | "w1::w2", | |
4604 | "ns::foo<char*>", | |
4605 | "ns::foo<int>", | |
4606 | "ns::foo<long>", | |
4607 | ||
e1ef7d7a PA |
4608 | /* These are used to check that the increment-last-char in the |
4609 | matching algorithm for completion doesn't match "t1_fund" when | |
4610 | completing "t1_func". */ | |
4611 | "t1_func", | |
4612 | "t1_func1", | |
4613 | "t1_fund", | |
4614 | "t1_fund1", | |
4615 | ||
4616 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4617 | cp-name-parser understands this as a single identifier ("função" | |
4618 | is "function" in PT). */ | |
4619 | u8"u8função", | |
4620 | ||
4621 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4622 | "yfunc\377", | |
4623 | ||
4624 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4625 | "\377", | |
4626 | "\377\377123", | |
4627 | ||
c62446b1 PA |
4628 | /* A name with all sorts of complications. Starts with "z" to make |
4629 | it easier for the completion tests below. */ | |
4630 | #define Z_SYM_NAME \ | |
4631 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4632 | "::tuple<(anonymous namespace)::ui*, " \ | |
4633 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4634 | ||
4635 | Z_SYM_NAME | |
4636 | }; | |
4637 | ||
5c58de74 PA |
4638 | /* Returns true if the mapped_index::find_name_component_bounds method |
4639 | finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, in | |
4640 | completion mode. */ | |
4641 | ||
4642 | static bool | |
4643 | check_find_bounds_finds (mapped_index &index, | |
4644 | const char *search_name, | |
4645 | gdb::array_view<const char *> expected_syms) | |
4646 | { | |
4647 | lookup_name_info lookup_name (search_name, | |
4648 | symbol_name_match_type::FULL, true); | |
4649 | ||
4650 | auto bounds = index.find_name_components_bounds (lookup_name); | |
4651 | ||
4652 | size_t distance = std::distance (bounds.first, bounds.second); | |
4653 | if (distance != expected_syms.size ()) | |
4654 | return false; | |
4655 | ||
4656 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4657 | { | |
4658 | auto nc_elem = bounds.first + exp_elem; | |
4659 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4660 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4661 | return false; | |
4662 | } | |
4663 | ||
4664 | return true; | |
4665 | } | |
4666 | ||
4667 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4668 | method. */ | |
4669 | ||
c62446b1 | 4670 | static void |
5c58de74 PA |
4671 | test_mapped_index_find_name_component_bounds () |
4672 | { | |
4673 | mock_mapped_index mock_index (test_symbols); | |
4674 | ||
4675 | mock_index.index ().build_name_components (); | |
4676 | ||
4677 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4678 | method in completion mode. */ | |
4679 | { | |
4680 | static const char *expected_syms[] = { | |
4681 | "t1_func", | |
4682 | "t1_func1", | |
5c58de74 PA |
4683 | }; |
4684 | ||
4685 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4686 | "t1_func", expected_syms)); | |
4687 | } | |
4688 | ||
4689 | /* Check that the increment-last-char in the name matching algorithm | |
4690 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4691 | { | |
4692 | static const char *expected_syms1[] = { | |
4693 | "\377", | |
4694 | "\377\377123", | |
4695 | }; | |
4696 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4697 | "\377", expected_syms1)); | |
4698 | ||
4699 | static const char *expected_syms2[] = { | |
4700 | "\377\377123", | |
4701 | }; | |
4702 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4703 | "\377\377", expected_syms2)); | |
4704 | } | |
4705 | } | |
4706 | ||
4707 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4708 | ||
4709 | static void | |
4710 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4711 | { |
4712 | mock_mapped_index mock_index (test_symbols); | |
4713 | ||
4714 | /* We let all tests run until the end even if some fails, for debug | |
4715 | convenience. */ | |
4716 | bool any_mismatch = false; | |
4717 | ||
4718 | /* Create the expected symbols list (an initializer_list). Needed | |
4719 | because lists have commas, and we need to pass them to CHECK, | |
4720 | which is a macro. */ | |
4721 | #define EXPECT(...) { __VA_ARGS__ } | |
4722 | ||
4723 | /* Wrapper for check_match that passes down the current | |
4724 | __FILE__/__LINE__. */ | |
4725 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4726 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4727 | mock_index, \ | |
4728 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4729 | EXPECTED_LIST) | |
4730 | ||
4731 | /* Identity checks. */ | |
4732 | for (const char *sym : test_symbols) | |
4733 | { | |
4734 | /* Should be able to match all existing symbols. */ | |
4735 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4736 | EXPECT (sym)); | |
4737 | ||
4738 | /* Should be able to match all existing symbols with | |
4739 | parameters. */ | |
4740 | std::string with_params = std::string (sym) + "(int)"; | |
4741 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4742 | EXPECT (sym)); | |
4743 | ||
4744 | /* Should be able to match all existing symbols with | |
4745 | parameters and qualifiers. */ | |
4746 | with_params = std::string (sym) + " ( int ) const"; | |
4747 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4748 | EXPECT (sym)); | |
4749 | ||
4750 | /* This should really find sym, but cp-name-parser.y doesn't | |
4751 | know about lvalue/rvalue qualifiers yet. */ | |
4752 | with_params = std::string (sym) + " ( int ) &&"; | |
4753 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4754 | {}); | |
4755 | } | |
4756 | ||
e1ef7d7a PA |
4757 | /* Check that the name matching algorithm for completion doesn't get |
4758 | confused with Latin1 'ÿ' / 0xff. */ | |
4759 | { | |
4760 | static const char str[] = "\377"; | |
4761 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4762 | EXPECT ("\377", "\377\377123")); | |
4763 | } | |
4764 | ||
4765 | /* Check that the increment-last-char in the matching algorithm for | |
4766 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4767 | { | |
4768 | static const char str[] = "t1_func"; | |
4769 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4770 | EXPECT ("t1_func", "t1_func1")); | |
4771 | } | |
4772 | ||
c62446b1 PA |
4773 | /* Check that completion mode works at each prefix of the expected |
4774 | symbol name. */ | |
4775 | { | |
4776 | static const char str[] = "function(int)"; | |
4777 | size_t len = strlen (str); | |
4778 | std::string lookup; | |
4779 | ||
4780 | for (size_t i = 1; i < len; i++) | |
4781 | { | |
4782 | lookup.assign (str, i); | |
4783 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4784 | EXPECT ("function")); | |
4785 | } | |
4786 | } | |
4787 | ||
4788 | /* While "w" is a prefix of both components, the match function | |
4789 | should still only be called once. */ | |
4790 | { | |
4791 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4792 | EXPECT ("w1::w2")); | |
4793 | } | |
4794 | ||
4795 | /* Same, with a "complicated" symbol. */ | |
4796 | { | |
4797 | static const char str[] = Z_SYM_NAME; | |
4798 | size_t len = strlen (str); | |
4799 | std::string lookup; | |
4800 | ||
4801 | for (size_t i = 1; i < len; i++) | |
4802 | { | |
4803 | lookup.assign (str, i); | |
4804 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4805 | EXPECT (Z_SYM_NAME)); | |
4806 | } | |
4807 | } | |
4808 | ||
4809 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4810 | { | |
4811 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4812 | {}); | |
4813 | } | |
4814 | ||
4815 | /* A complete symbol with parameters matches any overload, since the | |
4816 | index has no overload info. */ | |
4817 | { | |
4818 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4819 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4820 | } | |
4821 | ||
4822 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4823 | template argument list. */ | |
4824 | { | |
4825 | static const char expected[] = "ns::foo<int>"; | |
4826 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4827 | EXPECT (expected)); | |
4828 | } | |
4829 | ||
4830 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4831 | template argument list that includes a pointer. */ | |
4832 | { | |
4833 | static const char expected[] = "ns::foo<char*>"; | |
4834 | /* Try both completion and non-completion modes. */ | |
4835 | static const bool completion_mode[2] = {false, true}; | |
4836 | for (size_t i = 0; i < 2; i++) | |
4837 | { | |
4838 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4839 | completion_mode[i], EXPECT (expected)); | |
4840 | ||
4841 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4842 | completion_mode[i], EXPECT (expected)); | |
4843 | } | |
4844 | } | |
4845 | ||
4846 | { | |
4847 | /* Check method qualifiers are ignored. */ | |
4848 | static const char expected[] = "ns::foo<char*>"; | |
4849 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4850 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4851 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4852 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4853 | } | |
4854 | ||
4855 | /* Test lookup names that don't match anything. */ | |
4856 | { | |
4857 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, | |
4858 | {}); | |
4859 | } | |
4860 | ||
4861 | SELF_CHECK (!any_mismatch); | |
4862 | ||
4863 | #undef EXPECT | |
4864 | #undef CHECK_MATCH | |
4865 | } | |
4866 | ||
5c58de74 PA |
4867 | static void |
4868 | run_test () | |
4869 | { | |
4870 | test_mapped_index_find_name_component_bounds (); | |
4871 | test_dw2_expand_symtabs_matching_symbol (); | |
4872 | } | |
4873 | ||
c62446b1 PA |
4874 | }} // namespace selftests::dw2_expand_symtabs_matching |
4875 | ||
4876 | #endif /* GDB_SELF_TEST */ | |
4877 | ||
3f563c84 PA |
4878 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4879 | matched, to expand corresponding CUs that were marked. IDX is the | |
4880 | index of the symbol name that matched. */ | |
4881 | ||
4882 | static void | |
4883 | dw2_expand_marked_cus | |
4884 | (mapped_index &index, offset_type idx, | |
4885 | struct objfile *objfile, | |
4886 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4887 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4888 | search_domain kind) | |
4889 | { | |
4890 | const char *name; | |
4891 | offset_type *vec, vec_len, vec_idx; | |
4892 | bool global_seen = false; | |
4893 | ||
61920122 PA |
4894 | vec = (offset_type *) (index.constant_pool |
4895 | + MAYBE_SWAP (index.symbol_table[idx + 1])); | |
4896 | vec_len = MAYBE_SWAP (vec[0]); | |
4897 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4898 | { | |
4899 | struct dwarf2_per_cu_data *per_cu; | |
4900 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); | |
4901 | /* This value is only valid for index versions >= 7. */ | |
4902 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4903 | gdb_index_symbol_kind symbol_kind = | |
4904 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4905 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4906 | /* Only check the symbol attributes if they're present. | |
4907 | Indices prior to version 7 don't record them, | |
4908 | and indices >= 7 may elide them for certain symbols | |
4909 | (gold does this). */ | |
4910 | int attrs_valid = | |
4911 | (index.version >= 7 | |
4912 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4913 | ||
4914 | /* Work around gold/15646. */ | |
4915 | if (attrs_valid) | |
9291a0cd | 4916 | { |
61920122 PA |
4917 | if (!is_static && global_seen) |
4918 | continue; | |
4919 | if (!is_static) | |
4920 | global_seen = true; | |
4921 | } | |
3190f0c6 | 4922 | |
61920122 PA |
4923 | /* Only check the symbol's kind if it has one. */ |
4924 | if (attrs_valid) | |
4925 | { | |
4926 | switch (kind) | |
8943b874 | 4927 | { |
61920122 PA |
4928 | case VARIABLES_DOMAIN: |
4929 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4930 | continue; | |
4931 | break; | |
4932 | case FUNCTIONS_DOMAIN: | |
4933 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4934 | continue; |
61920122 PA |
4935 | break; |
4936 | case TYPES_DOMAIN: | |
4937 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4938 | continue; | |
4939 | break; | |
4940 | default: | |
4941 | break; | |
8943b874 | 4942 | } |
61920122 | 4943 | } |
8943b874 | 4944 | |
61920122 PA |
4945 | /* Don't crash on bad data. */ |
4946 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4947 | + dwarf2_per_objfile->n_type_units)) | |
4948 | { | |
4949 | complaint (&symfile_complaints, | |
4950 | _(".gdb_index entry has bad CU index" | |
4951 | " [in module %s]"), objfile_name (objfile)); | |
4952 | continue; | |
4953 | } | |
4954 | ||
4955 | per_cu = dw2_get_cutu (cu_index); | |
4956 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4957 | { | |
4958 | int symtab_was_null = | |
4959 | (per_cu->v.quick->compunit_symtab == NULL); | |
4960 | ||
4961 | dw2_instantiate_symtab (per_cu); | |
4962 | ||
4963 | if (expansion_notify != NULL | |
4964 | && symtab_was_null | |
4965 | && per_cu->v.quick->compunit_symtab != NULL) | |
4966 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4967 | } | |
4968 | } | |
4969 | } | |
4970 | ||
4971 | static void | |
4972 | dw2_expand_symtabs_matching | |
4973 | (struct objfile *objfile, | |
4974 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4975 | const lookup_name_info &lookup_name, | |
4976 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4977 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4978 | enum search_domain kind) | |
4979 | { | |
4980 | int i; | |
4981 | offset_type iter; | |
4982 | ||
4983 | dw2_setup (objfile); | |
4984 | ||
4985 | /* index_table is NULL if OBJF_READNOW. */ | |
4986 | if (!dwarf2_per_objfile->index_table) | |
4987 | return; | |
4988 | ||
4989 | if (file_matcher != NULL) | |
4990 | { | |
4991 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
4992 | htab_eq_pointer, | |
4993 | NULL, xcalloc, xfree)); | |
4994 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
4995 | htab_eq_pointer, | |
4996 | NULL, xcalloc, xfree)); | |
4997 | ||
4998 | /* The rule is CUs specify all the files, including those used by | |
4999 | any TU, so there's no need to scan TUs here. */ | |
5000 | ||
5001 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5002 | { | |
5003 | int j; | |
5004 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5005 | struct quick_file_names *file_data; | |
5006 | void **slot; | |
5007 | ||
5008 | QUIT; | |
5009 | ||
5010 | per_cu->v.quick->mark = 0; | |
156942c7 | 5011 | |
61920122 PA |
5012 | /* We only need to look at symtabs not already expanded. */ |
5013 | if (per_cu->v.quick->compunit_symtab) | |
5014 | continue; | |
5015 | ||
5016 | file_data = dw2_get_file_names (per_cu); | |
5017 | if (file_data == NULL) | |
5018 | continue; | |
5019 | ||
5020 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5021 | continue; | |
5022 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
3190f0c6 | 5023 | { |
61920122 | 5024 | per_cu->v.quick->mark = 1; |
3190f0c6 DE |
5025 | continue; |
5026 | } | |
5027 | ||
61920122 | 5028 | for (j = 0; j < file_data->num_file_names; ++j) |
276d885b | 5029 | { |
61920122 | 5030 | const char *this_real_name; |
276d885b | 5031 | |
61920122 PA |
5032 | if (file_matcher (file_data->file_names[j], false)) |
5033 | { | |
5034 | per_cu->v.quick->mark = 1; | |
5035 | break; | |
5036 | } | |
5037 | ||
5038 | /* Before we invoke realpath, which can get expensive when many | |
5039 | files are involved, do a quick comparison of the basenames. */ | |
5040 | if (!basenames_may_differ | |
5041 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5042 | true)) | |
5043 | continue; | |
276d885b | 5044 | |
61920122 PA |
5045 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
5046 | if (file_matcher (this_real_name, false)) | |
276d885b | 5047 | { |
61920122 PA |
5048 | per_cu->v.quick->mark = 1; |
5049 | break; | |
276d885b GB |
5050 | } |
5051 | } | |
61920122 PA |
5052 | |
5053 | slot = htab_find_slot (per_cu->v.quick->mark | |
5054 | ? visited_found.get () | |
5055 | : visited_not_found.get (), | |
5056 | file_data, INSERT); | |
5057 | *slot = file_data; | |
9291a0cd | 5058 | } |
61920122 PA |
5059 | } |
5060 | ||
5061 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5062 | ||
5063 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5064 | symbol_matcher, | |
5065 | kind, [&] (offset_type idx) | |
5066 | { | |
5067 | dw2_expand_marked_cus (index, idx, objfile, file_matcher, | |
5068 | expansion_notify, kind); | |
5069 | }); | |
9291a0cd TT |
5070 | } |
5071 | ||
43f3e411 | 5072 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
5073 | symtab. */ |
5074 | ||
43f3e411 DE |
5075 | static struct compunit_symtab * |
5076 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5077 | CORE_ADDR pc) | |
9703b513 TT |
5078 | { |
5079 | int i; | |
5080 | ||
43f3e411 DE |
5081 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
5082 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5083 | return cust; | |
9703b513 | 5084 | |
43f3e411 | 5085 | if (cust->includes == NULL) |
a3ec0bb1 DE |
5086 | return NULL; |
5087 | ||
43f3e411 | 5088 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 5089 | { |
43f3e411 | 5090 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 5091 | |
43f3e411 | 5092 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
5093 | if (s != NULL) |
5094 | return s; | |
5095 | } | |
5096 | ||
5097 | return NULL; | |
5098 | } | |
5099 | ||
43f3e411 DE |
5100 | static struct compunit_symtab * |
5101 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5102 | struct bound_minimal_symbol msymbol, | |
5103 | CORE_ADDR pc, | |
5104 | struct obj_section *section, | |
5105 | int warn_if_readin) | |
9291a0cd TT |
5106 | { |
5107 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 5108 | struct compunit_symtab *result; |
9291a0cd TT |
5109 | |
5110 | dw2_setup (objfile); | |
5111 | ||
5112 | if (!objfile->psymtabs_addrmap) | |
5113 | return NULL; | |
5114 | ||
9a3c8263 SM |
5115 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
5116 | pc); | |
9291a0cd TT |
5117 | if (!data) |
5118 | return NULL; | |
5119 | ||
43f3e411 | 5120 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 5121 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
5122 | paddress (get_objfile_arch (objfile), pc)); |
5123 | ||
43f3e411 DE |
5124 | result |
5125 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
5126 | pc); | |
9703b513 TT |
5127 | gdb_assert (result != NULL); |
5128 | return result; | |
9291a0cd TT |
5129 | } |
5130 | ||
9291a0cd | 5131 | static void |
44b13c5a | 5132 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 5133 | void *data, int need_fullname) |
9291a0cd | 5134 | { |
9291a0cd | 5135 | dw2_setup (objfile); |
ae2de4f8 | 5136 | |
bbf2f4df | 5137 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 5138 | { |
bbf2f4df | 5139 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 5140 | |
bbf2f4df PA |
5141 | htab_up visited (htab_create_alloc (10, |
5142 | htab_hash_pointer, htab_eq_pointer, | |
5143 | NULL, xcalloc, xfree)); | |
24c79950 | 5144 | |
bbf2f4df PA |
5145 | /* The rule is CUs specify all the files, including those used |
5146 | by any TU, so there's no need to scan TUs here. We can | |
5147 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 5148 | |
bbf2f4df PA |
5149 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
5150 | { | |
5151 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 5152 | |
bbf2f4df PA |
5153 | if (per_cu->v.quick->compunit_symtab) |
5154 | { | |
5155 | void **slot = htab_find_slot (visited.get (), | |
5156 | per_cu->v.quick->file_names, | |
5157 | INSERT); | |
9291a0cd | 5158 | |
bbf2f4df PA |
5159 | *slot = per_cu->v.quick->file_names; |
5160 | } | |
24c79950 | 5161 | } |
24c79950 | 5162 | |
bbf2f4df | 5163 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 5164 | { |
bbf2f4df PA |
5165 | int j; |
5166 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5167 | struct quick_file_names *file_data; | |
5168 | void **slot; | |
5169 | ||
5170 | /* We only need to look at symtabs not already expanded. */ | |
5171 | if (per_cu->v.quick->compunit_symtab) | |
5172 | continue; | |
74e2f255 | 5173 | |
bbf2f4df PA |
5174 | file_data = dw2_get_file_names (per_cu); |
5175 | if (file_data == NULL) | |
5176 | continue; | |
5177 | ||
5178 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
5179 | if (*slot) | |
5180 | { | |
5181 | /* Already visited. */ | |
5182 | continue; | |
5183 | } | |
5184 | *slot = file_data; | |
5185 | ||
5186 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5187 | { | |
5188 | const char *filename = file_data->file_names[j]; | |
5189 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5190 | } | |
9291a0cd TT |
5191 | } |
5192 | } | |
bbf2f4df PA |
5193 | |
5194 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5195 | { | |
14278e1f | 5196 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
5197 | |
5198 | if (need_fullname) | |
5199 | this_real_name = gdb_realpath (filename); | |
14278e1f | 5200 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 5201 | }); |
9291a0cd TT |
5202 | } |
5203 | ||
5204 | static int | |
5205 | dw2_has_symbols (struct objfile *objfile) | |
5206 | { | |
5207 | return 1; | |
5208 | } | |
5209 | ||
5210 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5211 | { | |
5212 | dw2_has_symbols, | |
5213 | dw2_find_last_source_symtab, | |
5214 | dw2_forget_cached_source_info, | |
f8eba3c6 | 5215 | dw2_map_symtabs_matching_filename, |
9291a0cd | 5216 | dw2_lookup_symbol, |
9291a0cd TT |
5217 | dw2_print_stats, |
5218 | dw2_dump, | |
5219 | dw2_relocate, | |
5220 | dw2_expand_symtabs_for_function, | |
5221 | dw2_expand_all_symtabs, | |
652a8996 | 5222 | dw2_expand_symtabs_with_fullname, |
40658b94 | 5223 | dw2_map_matching_symbols, |
9291a0cd | 5224 | dw2_expand_symtabs_matching, |
43f3e411 | 5225 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 5226 | NULL, |
9291a0cd TT |
5227 | dw2_map_symbol_filenames |
5228 | }; | |
5229 | ||
5230 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
5231 | file will use psymtabs, or 1 if using the GNU index. */ | |
5232 | ||
5233 | int | |
5234 | dwarf2_initialize_objfile (struct objfile *objfile) | |
5235 | { | |
5236 | /* If we're about to read full symbols, don't bother with the | |
5237 | indices. In this case we also don't care if some other debug | |
5238 | format is making psymtabs, because they are all about to be | |
5239 | expanded anyway. */ | |
5240 | if ((objfile->flags & OBJF_READNOW)) | |
5241 | { | |
5242 | int i; | |
5243 | ||
5244 | dwarf2_per_objfile->using_index = 1; | |
5245 | create_all_comp_units (objfile); | |
0e50663e | 5246 | create_all_type_units (objfile); |
7b9f3c50 DE |
5247 | dwarf2_per_objfile->quick_file_names_table = |
5248 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 5249 | |
1fd400ff | 5250 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 5251 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 5252 | { |
8832e7e3 | 5253 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 5254 | |
e254ef6a DE |
5255 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5256 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5257 | } |
5258 | ||
5259 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5260 | these functions will be no-ops because we will have expanded | |
5261 | all symtabs. */ | |
5262 | return 1; | |
5263 | } | |
5264 | ||
5265 | if (dwarf2_read_index (objfile)) | |
5266 | return 1; | |
5267 | ||
9291a0cd TT |
5268 | return 0; |
5269 | } | |
5270 | ||
5271 | \f | |
5272 | ||
dce234bc PP |
5273 | /* Build a partial symbol table. */ |
5274 | ||
5275 | void | |
f29dff0a | 5276 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5277 | { |
c9bf0622 | 5278 | |
af5bf4ad SM |
5279 | if (objfile->global_psymbols.capacity () == 0 |
5280 | && objfile->static_psymbols.capacity () == 0) | |
5281 | init_psymbol_list (objfile, 1024); | |
c906108c | 5282 | |
492d29ea | 5283 | TRY |
c9bf0622 TT |
5284 | { |
5285 | /* This isn't really ideal: all the data we allocate on the | |
5286 | objfile's obstack is still uselessly kept around. However, | |
5287 | freeing it seems unsafe. */ | |
906768f9 | 5288 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 5289 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 5290 | psymtabs.keep (); |
c9bf0622 | 5291 | } |
492d29ea PA |
5292 | CATCH (except, RETURN_MASK_ERROR) |
5293 | { | |
5294 | exception_print (gdb_stderr, except); | |
5295 | } | |
5296 | END_CATCH | |
c906108c | 5297 | } |
c906108c | 5298 | |
1ce1cefd DE |
5299 | /* Return the total length of the CU described by HEADER. */ |
5300 | ||
5301 | static unsigned int | |
5302 | get_cu_length (const struct comp_unit_head *header) | |
5303 | { | |
5304 | return header->initial_length_size + header->length; | |
5305 | } | |
5306 | ||
9c541725 | 5307 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 5308 | |
9c541725 PA |
5309 | static inline bool |
5310 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 5311 | { |
9c541725 PA |
5312 | sect_offset bottom = cu_header->sect_off; |
5313 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 5314 | |
9c541725 | 5315 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
5316 | } |
5317 | ||
3b80fe9b DE |
5318 | /* Find the base address of the compilation unit for range lists and |
5319 | location lists. It will normally be specified by DW_AT_low_pc. | |
5320 | In DWARF-3 draft 4, the base address could be overridden by | |
5321 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5322 | compilation units with discontinuous ranges. */ | |
5323 | ||
5324 | static void | |
5325 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5326 | { | |
5327 | struct attribute *attr; | |
5328 | ||
5329 | cu->base_known = 0; | |
5330 | cu->base_address = 0; | |
5331 | ||
5332 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
5333 | if (attr) | |
5334 | { | |
31aa7e4e | 5335 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5336 | cu->base_known = 1; |
5337 | } | |
5338 | else | |
5339 | { | |
5340 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
5341 | if (attr) | |
5342 | { | |
31aa7e4e | 5343 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5344 | cu->base_known = 1; |
5345 | } | |
5346 | } | |
5347 | } | |
5348 | ||
93311388 | 5349 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 5350 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
5351 | NOTE: This leaves members offset, first_die_offset to be filled in |
5352 | by the caller. */ | |
107d2387 | 5353 | |
d521ce57 | 5354 | static const gdb_byte * |
107d2387 | 5355 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
5356 | const gdb_byte *info_ptr, |
5357 | struct dwarf2_section_info *section, | |
5358 | rcuh_kind section_kind) | |
107d2387 AC |
5359 | { |
5360 | int signed_addr; | |
891d2f0b | 5361 | unsigned int bytes_read; |
43988095 JK |
5362 | const char *filename = get_section_file_name (section); |
5363 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
5364 | |
5365 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
5366 | cu_header->initial_length_size = bytes_read; | |
5367 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 5368 | info_ptr += bytes_read; |
107d2387 AC |
5369 | cu_header->version = read_2_bytes (abfd, info_ptr); |
5370 | info_ptr += 2; | |
43988095 JK |
5371 | if (cu_header->version < 5) |
5372 | switch (section_kind) | |
5373 | { | |
5374 | case rcuh_kind::COMPILE: | |
5375 | cu_header->unit_type = DW_UT_compile; | |
5376 | break; | |
5377 | case rcuh_kind::TYPE: | |
5378 | cu_header->unit_type = DW_UT_type; | |
5379 | break; | |
5380 | default: | |
5381 | internal_error (__FILE__, __LINE__, | |
5382 | _("read_comp_unit_head: invalid section_kind")); | |
5383 | } | |
5384 | else | |
5385 | { | |
5386 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
5387 | (read_1_byte (abfd, info_ptr)); | |
5388 | info_ptr += 1; | |
5389 | switch (cu_header->unit_type) | |
5390 | { | |
5391 | case DW_UT_compile: | |
5392 | if (section_kind != rcuh_kind::COMPILE) | |
5393 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5394 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
5395 | filename); | |
5396 | break; | |
5397 | case DW_UT_type: | |
5398 | section_kind = rcuh_kind::TYPE; | |
5399 | break; | |
5400 | default: | |
5401 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5402 | "(is %d, should be %d or %d) [in module %s]"), | |
5403 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
5404 | } | |
5405 | ||
5406 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5407 | info_ptr += 1; | |
5408 | } | |
9c541725 PA |
5409 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
5410 | cu_header, | |
5411 | &bytes_read); | |
613e1657 | 5412 | info_ptr += bytes_read; |
43988095 JK |
5413 | if (cu_header->version < 5) |
5414 | { | |
5415 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5416 | info_ptr += 1; | |
5417 | } | |
107d2387 AC |
5418 | signed_addr = bfd_get_sign_extend_vma (abfd); |
5419 | if (signed_addr < 0) | |
8e65ff28 | 5420 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 5421 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 5422 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 5423 | |
43988095 JK |
5424 | if (section_kind == rcuh_kind::TYPE) |
5425 | { | |
5426 | LONGEST type_offset; | |
5427 | ||
5428 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
5429 | info_ptr += 8; | |
5430 | ||
5431 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
5432 | info_ptr += bytes_read; | |
9c541725 PA |
5433 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
5434 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
5435 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
5436 | "header (is %s) [in module %s]"), plongest (type_offset), | |
5437 | filename); | |
5438 | } | |
5439 | ||
107d2387 AC |
5440 | return info_ptr; |
5441 | } | |
5442 | ||
36586728 TT |
5443 | /* Helper function that returns the proper abbrev section for |
5444 | THIS_CU. */ | |
5445 | ||
5446 | static struct dwarf2_section_info * | |
5447 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5448 | { | |
5449 | struct dwarf2_section_info *abbrev; | |
5450 | ||
5451 | if (this_cu->is_dwz) | |
5452 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
5453 | else | |
5454 | abbrev = &dwarf2_per_objfile->abbrev; | |
5455 | ||
5456 | return abbrev; | |
5457 | } | |
5458 | ||
9ff913ba DE |
5459 | /* Subroutine of read_and_check_comp_unit_head and |
5460 | read_and_check_type_unit_head to simplify them. | |
5461 | Perform various error checking on the header. */ | |
5462 | ||
5463 | static void | |
5464 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
5465 | struct dwarf2_section_info *section, |
5466 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 5467 | { |
a32a8923 | 5468 | const char *filename = get_section_file_name (section); |
9ff913ba | 5469 | |
43988095 | 5470 | if (header->version < 2 || header->version > 5) |
9ff913ba | 5471 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 5472 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
5473 | filename); |
5474 | ||
9c541725 | 5475 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 5476 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
5477 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
5478 | "(offset 0x%x + 6) [in module %s]"), | |
5479 | to_underlying (header->abbrev_sect_off), | |
5480 | to_underlying (header->sect_off), | |
9ff913ba DE |
5481 | filename); |
5482 | ||
9c541725 | 5483 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 5484 | avoid potential 32-bit overflow. */ |
9c541725 | 5485 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 5486 | > section->size) |
9c541725 PA |
5487 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
5488 | "(offset 0x%x + 0) [in module %s]"), | |
5489 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
5490 | filename); |
5491 | } | |
5492 | ||
5493 | /* Read in a CU/TU header and perform some basic error checking. | |
5494 | The contents of the header are stored in HEADER. | |
5495 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 5496 | |
d521ce57 | 5497 | static const gdb_byte * |
9ff913ba DE |
5498 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
5499 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 5500 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 5501 | const gdb_byte *info_ptr, |
43988095 | 5502 | rcuh_kind section_kind) |
72bf9492 | 5503 | { |
d521ce57 | 5504 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 5505 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 5506 | |
9c541725 | 5507 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 5508 | |
43988095 | 5509 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 5510 | |
9c541725 | 5511 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 5512 | |
4bdcc0c1 | 5513 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
5514 | |
5515 | return info_ptr; | |
348e048f DE |
5516 | } |
5517 | ||
f4dc4d17 DE |
5518 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5519 | ||
5520 | static sect_offset | |
5521 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 5522 | sect_offset sect_off) |
f4dc4d17 | 5523 | { |
a32a8923 | 5524 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 5525 | const gdb_byte *info_ptr; |
ac298888 | 5526 | unsigned int initial_length_size, offset_size; |
43988095 | 5527 | uint16_t version; |
f4dc4d17 DE |
5528 | |
5529 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 5530 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5531 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5532 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5533 | info_ptr += initial_length_size; |
5534 | ||
5535 | version = read_2_bytes (abfd, info_ptr); | |
5536 | info_ptr += 2; | |
5537 | if (version >= 5) | |
5538 | { | |
5539 | /* Skip unit type and address size. */ | |
5540 | info_ptr += 2; | |
5541 | } | |
5542 | ||
9c541725 | 5543 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5544 | } |
5545 | ||
aaa75496 JB |
5546 | /* Allocate a new partial symtab for file named NAME and mark this new |
5547 | partial symtab as being an include of PST. */ | |
5548 | ||
5549 | static void | |
d521ce57 | 5550 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
5551 | struct objfile *objfile) |
5552 | { | |
5553 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
5554 | ||
fbd9ab74 JK |
5555 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5556 | { | |
5557 | /* It shares objfile->objfile_obstack. */ | |
5558 | subpst->dirname = pst->dirname; | |
5559 | } | |
5560 | ||
aaa75496 JB |
5561 | subpst->textlow = 0; |
5562 | subpst->texthigh = 0; | |
5563 | ||
8d749320 SM |
5564 | subpst->dependencies |
5565 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
5566 | subpst->dependencies[0] = pst; |
5567 | subpst->number_of_dependencies = 1; | |
5568 | ||
5569 | subpst->globals_offset = 0; | |
5570 | subpst->n_global_syms = 0; | |
5571 | subpst->statics_offset = 0; | |
5572 | subpst->n_static_syms = 0; | |
43f3e411 | 5573 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
5574 | subpst->read_symtab = pst->read_symtab; |
5575 | subpst->readin = 0; | |
5576 | ||
5577 | /* No private part is necessary for include psymtabs. This property | |
5578 | can be used to differentiate between such include psymtabs and | |
10b3939b | 5579 | the regular ones. */ |
58a9656e | 5580 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
5581 | } |
5582 | ||
5583 | /* Read the Line Number Program data and extract the list of files | |
5584 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5585 | partial symtab for each of these included files. */ |
aaa75496 JB |
5586 | |
5587 | static void | |
5588 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
5589 | struct die_info *die, |
5590 | struct partial_symtab *pst) | |
aaa75496 | 5591 | { |
fff8551c | 5592 | line_header_up lh; |
d85a05f0 | 5593 | struct attribute *attr; |
aaa75496 | 5594 | |
d85a05f0 DJ |
5595 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
5596 | if (attr) | |
9c541725 | 5597 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5598 | if (lh == NULL) |
5599 | return; /* No linetable, so no includes. */ | |
5600 | ||
c6da4cef | 5601 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 5602 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
5603 | } |
5604 | ||
348e048f | 5605 | static hashval_t |
52dc124a | 5606 | hash_signatured_type (const void *item) |
348e048f | 5607 | { |
9a3c8263 SM |
5608 | const struct signatured_type *sig_type |
5609 | = (const struct signatured_type *) item; | |
9a619af0 | 5610 | |
348e048f | 5611 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5612 | return sig_type->signature; |
348e048f DE |
5613 | } |
5614 | ||
5615 | static int | |
52dc124a | 5616 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5617 | { |
9a3c8263 SM |
5618 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5619 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5620 | |
348e048f DE |
5621 | return lhs->signature == rhs->signature; |
5622 | } | |
5623 | ||
1fd400ff TT |
5624 | /* Allocate a hash table for signatured types. */ |
5625 | ||
5626 | static htab_t | |
673bfd45 | 5627 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
5628 | { |
5629 | return htab_create_alloc_ex (41, | |
52dc124a DE |
5630 | hash_signatured_type, |
5631 | eq_signatured_type, | |
1fd400ff TT |
5632 | NULL, |
5633 | &objfile->objfile_obstack, | |
5634 | hashtab_obstack_allocate, | |
5635 | dummy_obstack_deallocate); | |
5636 | } | |
5637 | ||
d467dd73 | 5638 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
5639 | |
5640 | static int | |
d467dd73 | 5641 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 5642 | { |
9a3c8263 SM |
5643 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
5644 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 5645 | |
b4dd5633 | 5646 | **datap = sigt; |
1fd400ff TT |
5647 | ++*datap; |
5648 | ||
5649 | return 1; | |
5650 | } | |
5651 | ||
78d4d2c5 | 5652 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
5653 | and fill them into TYPES_HTAB. It will process only type units, |
5654 | therefore DW_UT_type. */ | |
c88ee1f0 | 5655 | |
78d4d2c5 JK |
5656 | static void |
5657 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
5658 | dwarf2_section_info *section, htab_t &types_htab, |
5659 | rcuh_kind section_kind) | |
348e048f | 5660 | { |
3019eac3 | 5661 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 5662 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
5663 | bfd *abfd; |
5664 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 5665 | |
4bdcc0c1 DE |
5666 | abbrev_section = (dwo_file != NULL |
5667 | ? &dwo_file->sections.abbrev | |
5668 | : &dwarf2_per_objfile->abbrev); | |
5669 | ||
b4f54984 | 5670 | if (dwarf_read_debug) |
43988095 JK |
5671 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
5672 | get_section_name (section), | |
a32a8923 | 5673 | get_section_file_name (abbrev_section)); |
09406207 | 5674 | |
78d4d2c5 JK |
5675 | dwarf2_read_section (objfile, section); |
5676 | info_ptr = section->buffer; | |
348e048f | 5677 | |
78d4d2c5 JK |
5678 | if (info_ptr == NULL) |
5679 | return; | |
348e048f | 5680 | |
78d4d2c5 JK |
5681 | /* We can't set abfd until now because the section may be empty or |
5682 | not present, in which case the bfd is unknown. */ | |
5683 | abfd = get_section_bfd_owner (section); | |
348e048f | 5684 | |
78d4d2c5 JK |
5685 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
5686 | because we don't need to read any dies: the signature is in the | |
5687 | header. */ | |
3019eac3 | 5688 | |
78d4d2c5 JK |
5689 | end_ptr = info_ptr + section->size; |
5690 | while (info_ptr < end_ptr) | |
5691 | { | |
78d4d2c5 JK |
5692 | struct signatured_type *sig_type; |
5693 | struct dwo_unit *dwo_tu; | |
5694 | void **slot; | |
5695 | const gdb_byte *ptr = info_ptr; | |
5696 | struct comp_unit_head header; | |
5697 | unsigned int length; | |
8b70b953 | 5698 | |
9c541725 | 5699 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 5700 | |
a49dd8dd JK |
5701 | /* Initialize it due to a false compiler warning. */ |
5702 | header.signature = -1; | |
9c541725 | 5703 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 5704 | |
78d4d2c5 JK |
5705 | /* We need to read the type's signature in order to build the hash |
5706 | table, but we don't need anything else just yet. */ | |
348e048f | 5707 | |
43988095 JK |
5708 | ptr = read_and_check_comp_unit_head (&header, section, |
5709 | abbrev_section, ptr, section_kind); | |
348e048f | 5710 | |
78d4d2c5 | 5711 | length = get_cu_length (&header); |
6caca83c | 5712 | |
78d4d2c5 JK |
5713 | /* Skip dummy type units. */ |
5714 | if (ptr >= info_ptr + length | |
43988095 JK |
5715 | || peek_abbrev_code (abfd, ptr) == 0 |
5716 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
5717 | { |
5718 | info_ptr += length; | |
5719 | continue; | |
5720 | } | |
dee91e82 | 5721 | |
78d4d2c5 JK |
5722 | if (types_htab == NULL) |
5723 | { | |
5724 | if (dwo_file) | |
5725 | types_htab = allocate_dwo_unit_table (objfile); | |
5726 | else | |
5727 | types_htab = allocate_signatured_type_table (objfile); | |
5728 | } | |
8b70b953 | 5729 | |
78d4d2c5 JK |
5730 | if (dwo_file) |
5731 | { | |
5732 | sig_type = NULL; | |
5733 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5734 | struct dwo_unit); | |
5735 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 5736 | dwo_tu->signature = header.signature; |
9c541725 | 5737 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 5738 | dwo_tu->section = section; |
9c541725 | 5739 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
5740 | dwo_tu->length = length; |
5741 | } | |
5742 | else | |
5743 | { | |
5744 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
5745 | The real type_offset is in the DWO file. */ | |
5746 | dwo_tu = NULL; | |
5747 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5748 | struct signatured_type); | |
43988095 | 5749 | sig_type->signature = header.signature; |
9c541725 | 5750 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
5751 | sig_type->per_cu.objfile = objfile; |
5752 | sig_type->per_cu.is_debug_types = 1; | |
5753 | sig_type->per_cu.section = section; | |
9c541725 | 5754 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
5755 | sig_type->per_cu.length = length; |
5756 | } | |
5757 | ||
5758 | slot = htab_find_slot (types_htab, | |
5759 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
5760 | INSERT); | |
5761 | gdb_assert (slot != NULL); | |
5762 | if (*slot != NULL) | |
5763 | { | |
9c541725 | 5764 | sect_offset dup_sect_off; |
0349ea22 | 5765 | |
3019eac3 DE |
5766 | if (dwo_file) |
5767 | { | |
78d4d2c5 JK |
5768 | const struct dwo_unit *dup_tu |
5769 | = (const struct dwo_unit *) *slot; | |
5770 | ||
9c541725 | 5771 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
5772 | } |
5773 | else | |
5774 | { | |
78d4d2c5 JK |
5775 | const struct signatured_type *dup_tu |
5776 | = (const struct signatured_type *) *slot; | |
5777 | ||
9c541725 | 5778 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 5779 | } |
8b70b953 | 5780 | |
78d4d2c5 JK |
5781 | complaint (&symfile_complaints, |
5782 | _("debug type entry at offset 0x%x is duplicate to" | |
5783 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 5784 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 5785 | hex_string (header.signature)); |
78d4d2c5 JK |
5786 | } |
5787 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 5788 | |
78d4d2c5 JK |
5789 | if (dwarf_read_debug > 1) |
5790 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 5791 | to_underlying (sect_off), |
43988095 | 5792 | hex_string (header.signature)); |
3019eac3 | 5793 | |
78d4d2c5 JK |
5794 | info_ptr += length; |
5795 | } | |
5796 | } | |
3019eac3 | 5797 | |
78d4d2c5 JK |
5798 | /* Create the hash table of all entries in the .debug_types |
5799 | (or .debug_types.dwo) section(s). | |
5800 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
5801 | otherwise it is NULL. | |
b3c8eb43 | 5802 | |
78d4d2c5 | 5803 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 5804 | |
78d4d2c5 | 5805 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 5806 | |
78d4d2c5 JK |
5807 | static void |
5808 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
5809 | VEC (dwarf2_section_info_def) *types, | |
5810 | htab_t &types_htab) | |
5811 | { | |
5812 | int ix; | |
5813 | struct dwarf2_section_info *section; | |
5814 | ||
5815 | if (VEC_empty (dwarf2_section_info_def, types)) | |
5816 | return; | |
348e048f | 5817 | |
78d4d2c5 JK |
5818 | for (ix = 0; |
5819 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5820 | ++ix) | |
43988095 JK |
5821 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5822 | rcuh_kind::TYPE); | |
3019eac3 DE |
5823 | } |
5824 | ||
5825 | /* Create the hash table of all entries in the .debug_types section, | |
5826 | and initialize all_type_units. | |
5827 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5828 | otherwise non-zero. */ | |
5829 | ||
5830 | static int | |
5831 | create_all_type_units (struct objfile *objfile) | |
5832 | { | |
78d4d2c5 | 5833 | htab_t types_htab = NULL; |
b4dd5633 | 5834 | struct signatured_type **iter; |
3019eac3 | 5835 | |
43988095 JK |
5836 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5837 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5838 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5839 | if (types_htab == NULL) |
5840 | { | |
5841 | dwarf2_per_objfile->signatured_types = NULL; | |
5842 | return 0; | |
5843 | } | |
5844 | ||
348e048f DE |
5845 | dwarf2_per_objfile->signatured_types = types_htab; |
5846 | ||
6aa5f3a6 DE |
5847 | dwarf2_per_objfile->n_type_units |
5848 | = dwarf2_per_objfile->n_allocated_type_units | |
5849 | = htab_elements (types_htab); | |
8d749320 SM |
5850 | dwarf2_per_objfile->all_type_units = |
5851 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5852 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5853 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5854 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5855 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5856 | |
348e048f DE |
5857 | return 1; |
5858 | } | |
5859 | ||
6aa5f3a6 DE |
5860 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5861 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5862 | Otherwise we find one. */ | |
5863 | ||
5864 | static struct signatured_type * | |
5865 | add_type_unit (ULONGEST sig, void **slot) | |
5866 | { | |
5867 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5868 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5869 | struct signatured_type *sig_type; | |
5870 | ||
5871 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5872 | ++n_type_units; | |
5873 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5874 | { | |
5875 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5876 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5877 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5878 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5879 | = XRESIZEVEC (struct signatured_type *, |
5880 | dwarf2_per_objfile->all_type_units, | |
5881 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5882 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5883 | } | |
5884 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5885 | ||
5886 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5887 | struct signatured_type); | |
5888 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5889 | sig_type->signature = sig; | |
5890 | sig_type->per_cu.is_debug_types = 1; | |
5891 | if (dwarf2_per_objfile->using_index) | |
5892 | { | |
5893 | sig_type->per_cu.v.quick = | |
5894 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5895 | struct dwarf2_per_cu_quick_data); | |
5896 | } | |
5897 | ||
5898 | if (slot == NULL) | |
5899 | { | |
5900 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5901 | sig_type, INSERT); | |
5902 | } | |
5903 | gdb_assert (*slot == NULL); | |
5904 | *slot = sig_type; | |
5905 | /* The rest of sig_type must be filled in by the caller. */ | |
5906 | return sig_type; | |
5907 | } | |
5908 | ||
a2ce51a0 DE |
5909 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5910 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5911 | ||
5912 | static void | |
5913 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5914 | struct signatured_type *sig_entry, | |
5915 | struct dwo_unit *dwo_entry) | |
5916 | { | |
7ee85ab1 | 5917 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5918 | gdb_assert (! sig_entry->per_cu.queued); |
5919 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5920 | if (dwarf2_per_objfile->using_index) |
5921 | { | |
5922 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5923 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5924 | } |
5925 | else | |
5926 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5927 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5928 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5929 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5930 | gdb_assert (sig_entry->dwo_unit == NULL); |
5931 | ||
5932 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5933 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5934 | sig_entry->per_cu.length = dwo_entry->length; |
5935 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5936 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5937 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5938 | sig_entry->dwo_unit = dwo_entry; | |
5939 | } | |
5940 | ||
5941 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5942 | If we haven't read the TU yet, create the signatured_type data structure |
5943 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5944 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5945 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5946 | containing that CU. Otherwise we could end up reading several other DWO | |
5947 | files (due to comdat folding) to process the transitive closure of all the | |
5948 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5949 | type signature that it needs. | |
a2ce51a0 DE |
5950 | We only do this for .gdb_index because in the psymtab case we already have |
5951 | to read all the DWOs to build the type unit groups. */ | |
5952 | ||
5953 | static struct signatured_type * | |
5954 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5955 | { | |
5956 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5957 | struct dwo_file *dwo_file; | |
5958 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5959 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5960 | void **slot; |
a2ce51a0 DE |
5961 | |
5962 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5963 | ||
6aa5f3a6 DE |
5964 | /* If TU skeletons have been removed then we may not have read in any |
5965 | TUs yet. */ | |
5966 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5967 | { | |
5968 | dwarf2_per_objfile->signatured_types | |
5969 | = allocate_signatured_type_table (objfile); | |
5970 | } | |
a2ce51a0 DE |
5971 | |
5972 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5973 | Use the global signatured_types array to do our own comdat-folding |
5974 | of types. If this is the first time we're reading this TU, and | |
5975 | the TU has an entry in .gdb_index, replace the recorded data from | |
5976 | .gdb_index with this TU. */ | |
a2ce51a0 | 5977 | |
a2ce51a0 | 5978 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
5979 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
5980 | &find_sig_entry, INSERT); | |
9a3c8263 | 5981 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5982 | |
5983 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5984 | read. Don't reassign the global entry to point to this DWO if that's |
5985 | the case. Also note that if the TU is already being read, it may not | |
5986 | have come from a DWO, the program may be a mix of Fission-compiled | |
5987 | code and non-Fission-compiled code. */ | |
5988 | ||
5989 | /* Have we already tried to read this TU? | |
5990 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5991 | needn't exist in the global table yet). */ | |
5992 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
5993 | return sig_entry; |
5994 | ||
6aa5f3a6 DE |
5995 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
5996 | dwo_unit of the TU itself. */ | |
5997 | dwo_file = cu->dwo_unit->dwo_file; | |
5998 | ||
a2ce51a0 DE |
5999 | /* Ok, this is the first time we're reading this TU. */ |
6000 | if (dwo_file->tus == NULL) | |
6001 | return NULL; | |
6002 | find_dwo_entry.signature = sig; | |
9a3c8263 | 6003 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
6004 | if (dwo_entry == NULL) |
6005 | return NULL; | |
6006 | ||
6aa5f3a6 DE |
6007 | /* If the global table doesn't have an entry for this TU, add one. */ |
6008 | if (sig_entry == NULL) | |
6009 | sig_entry = add_type_unit (sig, slot); | |
6010 | ||
a2ce51a0 | 6011 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 6012 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6013 | return sig_entry; |
6014 | } | |
6015 | ||
a2ce51a0 DE |
6016 | /* Subroutine of lookup_signatured_type. |
6017 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6018 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6019 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6020 | |
6021 | static struct signatured_type * | |
6022 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6023 | { | |
6024 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6025 | struct dwp_file *dwp_file = get_dwp_file (); | |
6026 | struct dwo_unit *dwo_entry; | |
6027 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6028 | void **slot; |
a2ce51a0 DE |
6029 | |
6030 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6031 | gdb_assert (dwp_file != NULL); | |
6032 | ||
6aa5f3a6 DE |
6033 | /* If TU skeletons have been removed then we may not have read in any |
6034 | TUs yet. */ | |
6035 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 6036 | { |
6aa5f3a6 DE |
6037 | dwarf2_per_objfile->signatured_types |
6038 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
6039 | } |
6040 | ||
6aa5f3a6 DE |
6041 | find_sig_entry.signature = sig; |
6042 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6043 | &find_sig_entry, INSERT); | |
9a3c8263 | 6044 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6045 | |
6046 | /* Have we already tried to read this TU? | |
6047 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6048 | needn't exist in the global table yet). */ | |
6049 | if (sig_entry != NULL) | |
6050 | return sig_entry; | |
6051 | ||
a2ce51a0 DE |
6052 | if (dwp_file->tus == NULL) |
6053 | return NULL; | |
57d63ce2 DE |
6054 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
6055 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
6056 | if (dwo_entry == NULL) |
6057 | return NULL; | |
6058 | ||
6aa5f3a6 | 6059 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
6060 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
6061 | ||
a2ce51a0 DE |
6062 | return sig_entry; |
6063 | } | |
6064 | ||
380bca97 | 6065 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6066 | Returns NULL if signature SIG is not present in the table. |
6067 | It is up to the caller to complain about this. */ | |
348e048f DE |
6068 | |
6069 | static struct signatured_type * | |
a2ce51a0 | 6070 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6071 | { |
a2ce51a0 DE |
6072 | if (cu->dwo_unit |
6073 | && dwarf2_per_objfile->using_index) | |
6074 | { | |
6075 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6076 | These cases require special processing. */ | |
6077 | if (get_dwp_file () == NULL) | |
6078 | return lookup_dwo_signatured_type (cu, sig); | |
6079 | else | |
6080 | return lookup_dwp_signatured_type (cu, sig); | |
6081 | } | |
6082 | else | |
6083 | { | |
6084 | struct signatured_type find_entry, *entry; | |
348e048f | 6085 | |
a2ce51a0 DE |
6086 | if (dwarf2_per_objfile->signatured_types == NULL) |
6087 | return NULL; | |
6088 | find_entry.signature = sig; | |
9a3c8263 SM |
6089 | entry = ((struct signatured_type *) |
6090 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
6091 | return entry; |
6092 | } | |
348e048f | 6093 | } |
42e7ad6c DE |
6094 | \f |
6095 | /* Low level DIE reading support. */ | |
348e048f | 6096 | |
d85a05f0 DJ |
6097 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6098 | ||
6099 | static void | |
6100 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6101 | struct dwarf2_cu *cu, |
3019eac3 DE |
6102 | struct dwarf2_section_info *section, |
6103 | struct dwo_file *dwo_file) | |
d85a05f0 | 6104 | { |
fceca515 | 6105 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 6106 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 6107 | reader->cu = cu; |
3019eac3 | 6108 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6109 | reader->die_section = section; |
6110 | reader->buffer = section->buffer; | |
f664829e | 6111 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 6112 | reader->comp_dir = NULL; |
d85a05f0 DJ |
6113 | } |
6114 | ||
b0c7bfa9 DE |
6115 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6116 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
6117 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
6118 | already. | |
6119 | ||
6120 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6121 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6122 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6123 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6124 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6125 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
6126 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
6127 | are filled in with the info of the DIE from the DWO file. | |
6128 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
6129 | provided an abbrev table to use. | |
6130 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
6131 | ||
6132 | static int | |
6133 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
6134 | struct dwo_unit *dwo_unit, | |
6135 | int abbrev_table_provided, | |
6136 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 6137 | const char *stub_comp_dir, |
b0c7bfa9 | 6138 | struct die_reader_specs *result_reader, |
d521ce57 | 6139 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
6140 | struct die_info **result_comp_unit_die, |
6141 | int *result_has_children) | |
6142 | { | |
6143 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6144 | struct dwarf2_cu *cu = this_cu->cu; | |
6145 | struct dwarf2_section_info *section; | |
6146 | bfd *abfd; | |
d521ce57 | 6147 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6148 | ULONGEST signature; /* Or dwo_id. */ |
6149 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
6150 | int i,num_extra_attrs; | |
6151 | struct dwarf2_section_info *dwo_abbrev_section; | |
6152 | struct attribute *attr; | |
6153 | struct die_info *comp_unit_die; | |
6154 | ||
b0aeadb3 DE |
6155 | /* At most one of these may be provided. */ |
6156 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6157 | |
b0c7bfa9 DE |
6158 | /* These attributes aren't processed until later: |
6159 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6160 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6161 | referenced later. However, these attributes are found in the stub | |
6162 | which we won't have later. In order to not impose this complication | |
6163 | on the rest of the code, we read them here and copy them to the | |
6164 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6165 | |
6166 | stmt_list = NULL; | |
6167 | low_pc = NULL; | |
6168 | high_pc = NULL; | |
6169 | ranges = NULL; | |
6170 | comp_dir = NULL; | |
6171 | ||
6172 | if (stub_comp_unit_die != NULL) | |
6173 | { | |
6174 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6175 | DWO file. */ | |
6176 | if (! this_cu->is_debug_types) | |
6177 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
6178 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6179 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6180 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6181 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6182 | ||
6183 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
6184 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
6185 | cu->addr_base = 0; | |
6186 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
6187 | if (attr) | |
6188 | cu->addr_base = DW_UNSND (attr); | |
6189 | ||
6190 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
6191 | We need the value before we can process DW_AT_ranges. */ | |
6192 | cu->ranges_base = 0; | |
6193 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
6194 | if (attr) | |
6195 | cu->ranges_base = DW_UNSND (attr); | |
6196 | } | |
a2ce51a0 DE |
6197 | else if (stub_comp_dir != NULL) |
6198 | { | |
6199 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 6200 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6201 | comp_dir->name = DW_AT_comp_dir; |
6202 | comp_dir->form = DW_FORM_string; | |
6203 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
6204 | DW_STRING (comp_dir) = stub_comp_dir; | |
6205 | } | |
b0c7bfa9 DE |
6206 | |
6207 | /* Set up for reading the DWO CU/TU. */ | |
6208 | cu->dwo_unit = dwo_unit; | |
6209 | section = dwo_unit->section; | |
6210 | dwarf2_read_section (objfile, section); | |
a32a8923 | 6211 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
6212 | begin_info_ptr = info_ptr = (section->buffer |
6213 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
6214 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
6215 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
6216 | ||
6217 | if (this_cu->is_debug_types) | |
6218 | { | |
b0c7bfa9 DE |
6219 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
6220 | ||
43988095 | 6221 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 6222 | dwo_abbrev_section, |
43988095 | 6223 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6224 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6225 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6226 | { |
6227 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
6228 | " TU at offset 0x%x [in module %s]"), | |
6229 | hex_string (sig_type->signature), | |
43988095 | 6230 | hex_string (cu->header.signature), |
9c541725 | 6231 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
6232 | bfd_get_filename (abfd)); |
6233 | } | |
9c541725 | 6234 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6235 | /* For DWOs coming from DWP files, we don't know the CU length |
6236 | nor the type's offset in the TU until now. */ | |
6237 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 6238 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6239 | |
6240 | /* Establish the type offset that can be used to lookup the type. | |
6241 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6242 | sig_type->type_offset_in_section |
6243 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6244 | } |
6245 | else | |
6246 | { | |
6247 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
6248 | dwo_abbrev_section, | |
43988095 | 6249 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6250 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6251 | /* For DWOs coming from DWP files, we don't know the CU length |
6252 | until now. */ | |
6253 | dwo_unit->length = get_cu_length (&cu->header); | |
6254 | } | |
6255 | ||
02142a6c DE |
6256 | /* Replace the CU's original abbrev table with the DWO's. |
6257 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
6258 | if (abbrev_table_provided) |
6259 | { | |
6260 | /* Don't free the provided abbrev table, the caller of | |
6261 | init_cutu_and_read_dies owns it. */ | |
6262 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6263 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
6264 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6265 | } | |
6266 | else | |
6267 | { | |
6268 | dwarf2_free_abbrev_table (cu); | |
6269 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6270 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
6271 | } |
6272 | ||
6273 | /* Read in the die, but leave space to copy over the attributes | |
6274 | from the stub. This has the benefit of simplifying the rest of | |
6275 | the code - all the work to maintain the illusion of a single | |
6276 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6277 | num_extra_attrs = ((stmt_list != NULL) | |
6278 | + (low_pc != NULL) | |
6279 | + (high_pc != NULL) | |
6280 | + (ranges != NULL) | |
6281 | + (comp_dir != NULL)); | |
6282 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
6283 | result_has_children, num_extra_attrs); | |
6284 | ||
6285 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6286 | comp_unit_die = *result_comp_unit_die; | |
6287 | i = comp_unit_die->num_attrs; | |
6288 | if (stmt_list != NULL) | |
6289 | comp_unit_die->attrs[i++] = *stmt_list; | |
6290 | if (low_pc != NULL) | |
6291 | comp_unit_die->attrs[i++] = *low_pc; | |
6292 | if (high_pc != NULL) | |
6293 | comp_unit_die->attrs[i++] = *high_pc; | |
6294 | if (ranges != NULL) | |
6295 | comp_unit_die->attrs[i++] = *ranges; | |
6296 | if (comp_dir != NULL) | |
6297 | comp_unit_die->attrs[i++] = *comp_dir; | |
6298 | comp_unit_die->num_attrs += num_extra_attrs; | |
6299 | ||
b4f54984 | 6300 | if (dwarf_die_debug) |
bf6af496 DE |
6301 | { |
6302 | fprintf_unfiltered (gdb_stdlog, | |
6303 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 6304 | get_section_name (section), |
bf6af496 DE |
6305 | (unsigned) (begin_info_ptr - section->buffer), |
6306 | bfd_get_filename (abfd)); | |
b4f54984 | 6307 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6308 | } |
6309 | ||
a2ce51a0 DE |
6310 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
6311 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
6312 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
6313 | to get it via circuitous means. Blech. */ | |
6314 | if (comp_dir != NULL) | |
6315 | result_reader->comp_dir = DW_STRING (comp_dir); | |
6316 | ||
b0c7bfa9 DE |
6317 | /* Skip dummy compilation units. */ |
6318 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6319 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6320 | return 0; | |
6321 | ||
6322 | *result_info_ptr = info_ptr; | |
6323 | return 1; | |
6324 | } | |
6325 | ||
6326 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
6327 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 6328 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6329 | |
6330 | static struct dwo_unit * | |
6331 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
6332 | struct die_info *comp_unit_die) | |
6333 | { | |
6334 | struct dwarf2_cu *cu = this_cu->cu; | |
6335 | struct attribute *attr; | |
6336 | ULONGEST signature; | |
6337 | struct dwo_unit *dwo_unit; | |
6338 | const char *comp_dir, *dwo_name; | |
6339 | ||
a2ce51a0 DE |
6340 | gdb_assert (cu != NULL); |
6341 | ||
b0c7bfa9 | 6342 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
6343 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6344 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
6345 | |
6346 | if (this_cu->is_debug_types) | |
6347 | { | |
6348 | struct signatured_type *sig_type; | |
6349 | ||
6350 | /* Since this_cu is the first member of struct signatured_type, | |
6351 | we can go from a pointer to one to a pointer to the other. */ | |
6352 | sig_type = (struct signatured_type *) this_cu; | |
6353 | signature = sig_type->signature; | |
6354 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
6355 | } | |
6356 | else | |
6357 | { | |
6358 | struct attribute *attr; | |
6359 | ||
6360 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6361 | if (! attr) | |
6362 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
6363 | " [in module %s]"), | |
4262abfb | 6364 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
6365 | signature = DW_UNSND (attr); |
6366 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
6367 | signature); | |
6368 | } | |
6369 | ||
b0c7bfa9 DE |
6370 | return dwo_unit; |
6371 | } | |
6372 | ||
a2ce51a0 | 6373 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
6374 | See it for a description of the parameters. |
6375 | Read a TU directly from a DWO file, bypassing the stub. | |
6376 | ||
6377 | Note: This function could be a little bit simpler if we shared cleanups | |
6378 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
6379 | to do, so we keep this function self-contained. Or we could move this | |
6380 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
6381 | |
6382 | static void | |
6aa5f3a6 DE |
6383 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
6384 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
6385 | die_reader_func_ftype *die_reader_func, |
6386 | void *data) | |
6387 | { | |
6388 | struct dwarf2_cu *cu; | |
6389 | struct signatured_type *sig_type; | |
6aa5f3a6 | 6390 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
6391 | struct die_reader_specs reader; |
6392 | const gdb_byte *info_ptr; | |
6393 | struct die_info *comp_unit_die; | |
6394 | int has_children; | |
6395 | ||
6396 | /* Verify we can do the following downcast, and that we have the | |
6397 | data we need. */ | |
6398 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6399 | sig_type = (struct signatured_type *) this_cu; | |
6400 | gdb_assert (sig_type->dwo_unit != NULL); | |
6401 | ||
6402 | cleanups = make_cleanup (null_cleanup, NULL); | |
6403 | ||
6aa5f3a6 DE |
6404 | if (use_existing_cu && this_cu->cu != NULL) |
6405 | { | |
6406 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6407 | cu = this_cu->cu; | |
6408 | /* There's no need to do the rereading_dwo_cu handling that | |
6409 | init_cutu_and_read_dies does since we don't read the stub. */ | |
6410 | } | |
6411 | else | |
6412 | { | |
6413 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6414 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6415 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
6416 | init_one_comp_unit (cu, this_cu); |
6417 | /* If an error occurs while loading, release our storage. */ | |
6418 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
6419 | } | |
6420 | ||
6421 | /* A future optimization, if needed, would be to use an existing | |
6422 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6423 | could share abbrev tables. */ | |
a2ce51a0 DE |
6424 | |
6425 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
6426 | 0 /* abbrev_table_provided */, | |
6427 | NULL /* stub_comp_unit_die */, | |
6428 | sig_type->dwo_unit->dwo_file->comp_dir, | |
6429 | &reader, &info_ptr, | |
6430 | &comp_unit_die, &has_children) == 0) | |
6431 | { | |
6432 | /* Dummy die. */ | |
6433 | do_cleanups (cleanups); | |
6434 | return; | |
6435 | } | |
6436 | ||
6437 | /* All the "real" work is done here. */ | |
6438 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6439 | ||
6aa5f3a6 | 6440 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
6441 | but the alternative is making the latter more complex. |
6442 | This function is only for the special case of using DWO files directly: | |
6443 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 6444 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 6445 | { |
6aa5f3a6 DE |
6446 | if (keep) |
6447 | { | |
6448 | /* We've successfully allocated this compilation unit. Let our | |
6449 | caller clean it up when finished with it. */ | |
6450 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6451 | |
6aa5f3a6 DE |
6452 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6453 | So we have to manually free the abbrev table. */ | |
6454 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 6455 | |
6aa5f3a6 DE |
6456 | /* Link this CU into read_in_chain. */ |
6457 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6458 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6459 | } | |
6460 | else | |
6461 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6462 | } |
a2ce51a0 DE |
6463 | |
6464 | do_cleanups (cleanups); | |
6465 | } | |
6466 | ||
fd820528 | 6467 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6468 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6469 | |
f4dc4d17 DE |
6470 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6471 | Otherwise the table specified in the comp unit header is read in and used. | |
6472 | This is an optimization for when we already have the abbrev table. | |
6473 | ||
dee91e82 DE |
6474 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6475 | Otherwise, a new CU is allocated with xmalloc. | |
6476 | ||
6477 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
6478 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
6479 | ||
6480 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 6481 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 6482 | |
70221824 | 6483 | static void |
fd820528 | 6484 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 6485 | struct abbrev_table *abbrev_table, |
fd820528 DE |
6486 | int use_existing_cu, int keep, |
6487 | die_reader_func_ftype *die_reader_func, | |
6488 | void *data) | |
c906108c | 6489 | { |
dee91e82 | 6490 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6491 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6492 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 6493 | struct dwarf2_cu *cu; |
d521ce57 | 6494 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 6495 | struct die_reader_specs reader; |
d85a05f0 | 6496 | struct die_info *comp_unit_die; |
dee91e82 | 6497 | int has_children; |
d85a05f0 | 6498 | struct attribute *attr; |
365156ad | 6499 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 6500 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6501 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6502 | /* Non-zero if CU currently points to a DWO file and we need to |
6503 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6504 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6505 | int rereading_dwo_cu = 0; |
c906108c | 6506 | |
b4f54984 | 6507 | if (dwarf_die_debug) |
09406207 DE |
6508 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6509 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6510 | to_underlying (this_cu->sect_off)); |
09406207 | 6511 | |
dee91e82 DE |
6512 | if (use_existing_cu) |
6513 | gdb_assert (keep); | |
23745b47 | 6514 | |
a2ce51a0 DE |
6515 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6516 | file (instead of going through the stub), short-circuit all of this. */ | |
6517 | if (this_cu->reading_dwo_directly) | |
6518 | { | |
6519 | /* Narrow down the scope of possibilities to have to understand. */ | |
6520 | gdb_assert (this_cu->is_debug_types); | |
6521 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
6522 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
6523 | die_reader_func, data); | |
a2ce51a0 DE |
6524 | return; |
6525 | } | |
6526 | ||
dee91e82 DE |
6527 | cleanups = make_cleanup (null_cleanup, NULL); |
6528 | ||
6529 | /* This is cheap if the section is already read in. */ | |
6530 | dwarf2_read_section (objfile, section); | |
6531 | ||
9c541725 | 6532 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6533 | |
6534 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6535 | |
6536 | if (use_existing_cu && this_cu->cu != NULL) | |
6537 | { | |
6538 | cu = this_cu->cu; | |
42e7ad6c DE |
6539 | /* If this CU is from a DWO file we need to start over, we need to |
6540 | refetch the attributes from the skeleton CU. | |
6541 | This could be optimized by retrieving those attributes from when we | |
6542 | were here the first time: the previous comp_unit_die was stored in | |
6543 | comp_unit_obstack. But there's no data yet that we need this | |
6544 | optimization. */ | |
6545 | if (cu->dwo_unit != NULL) | |
6546 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6547 | } |
6548 | else | |
6549 | { | |
6550 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6551 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6552 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 6553 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 6554 | /* If an error occurs while loading, release our storage. */ |
365156ad | 6555 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 6556 | } |
dee91e82 | 6557 | |
b0c7bfa9 | 6558 | /* Get the header. */ |
9c541725 | 6559 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6560 | { |
6561 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6562 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6563 | } |
6564 | else | |
6565 | { | |
3019eac3 | 6566 | if (this_cu->is_debug_types) |
dee91e82 | 6567 | { |
43988095 | 6568 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 6569 | abbrev_section, info_ptr, |
43988095 | 6570 | rcuh_kind::TYPE); |
dee91e82 | 6571 | |
42e7ad6c DE |
6572 | /* Since per_cu is the first member of struct signatured_type, |
6573 | we can go from a pointer to one to a pointer to the other. */ | |
6574 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6575 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6576 | gdb_assert (sig_type->type_offset_in_tu |
6577 | == cu->header.type_cu_offset_in_tu); | |
6578 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6579 | |
42e7ad6c DE |
6580 | /* LENGTH has not been set yet for type units if we're |
6581 | using .gdb_index. */ | |
1ce1cefd | 6582 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
6583 | |
6584 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6585 | sig_type->type_offset_in_section = |
6586 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6587 | |
6588 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6589 | } |
6590 | else | |
6591 | { | |
4bdcc0c1 DE |
6592 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
6593 | abbrev_section, | |
43988095 JK |
6594 | info_ptr, |
6595 | rcuh_kind::COMPILE); | |
dee91e82 | 6596 | |
9c541725 | 6597 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 6598 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 6599 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6600 | } |
6601 | } | |
10b3939b | 6602 | |
6caca83c | 6603 | /* Skip dummy compilation units. */ |
dee91e82 | 6604 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
6605 | || peek_abbrev_code (abfd, info_ptr) == 0) |
6606 | { | |
dee91e82 | 6607 | do_cleanups (cleanups); |
21b2bd31 | 6608 | return; |
6caca83c CC |
6609 | } |
6610 | ||
433df2d4 DE |
6611 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6612 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
6613 | done. Note that it's important that if the CU had an abbrev table |
6614 | on entry we don't free it when we're done: Somewhere up the call stack | |
6615 | it may be in use. */ | |
f4dc4d17 DE |
6616 | if (abbrev_table != NULL) |
6617 | { | |
6618 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 6619 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
6620 | cu->abbrev_table = abbrev_table; |
6621 | } | |
6622 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 6623 | { |
4bdcc0c1 | 6624 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
6625 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6626 | } | |
42e7ad6c DE |
6627 | else if (rereading_dwo_cu) |
6628 | { | |
6629 | dwarf2_free_abbrev_table (cu); | |
6630 | dwarf2_read_abbrevs (cu, abbrev_section); | |
6631 | } | |
af703f96 | 6632 | |
dee91e82 | 6633 | /* Read the top level CU/TU die. */ |
3019eac3 | 6634 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 6635 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 6636 | |
b0c7bfa9 DE |
6637 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
6638 | from the DWO file. | |
6639 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
6640 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
6641 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6642 | if (attr) | |
6643 | { | |
3019eac3 | 6644 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6645 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
6646 | |
6647 | if (has_children) | |
6a506a2d DE |
6648 | { |
6649 | complaint (&symfile_complaints, | |
6650 | _("compilation unit with DW_AT_GNU_dwo_name" | |
6651 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 6652 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 6653 | } |
b0c7bfa9 | 6654 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 6655 | if (dwo_unit != NULL) |
3019eac3 | 6656 | { |
6a506a2d DE |
6657 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
6658 | abbrev_table != NULL, | |
a2ce51a0 | 6659 | comp_unit_die, NULL, |
6a506a2d DE |
6660 | &reader, &info_ptr, |
6661 | &dwo_comp_unit_die, &has_children) == 0) | |
6662 | { | |
6663 | /* Dummy die. */ | |
6664 | do_cleanups (cleanups); | |
6665 | return; | |
6666 | } | |
6667 | comp_unit_die = dwo_comp_unit_die; | |
6668 | } | |
6669 | else | |
6670 | { | |
6671 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6672 | the stub. A complaint has already been logged. There's | |
6673 | not much more we can do except pass on the stub DIE to | |
6674 | die_reader_func. We don't want to throw an error on bad | |
6675 | debug info. */ | |
3019eac3 DE |
6676 | } |
6677 | } | |
6678 | ||
b0c7bfa9 | 6679 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
6680 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
6681 | ||
b0c7bfa9 | 6682 | /* Done, clean up. */ |
365156ad | 6683 | if (free_cu_cleanup != NULL) |
348e048f | 6684 | { |
365156ad TT |
6685 | if (keep) |
6686 | { | |
6687 | /* We've successfully allocated this compilation unit. Let our | |
6688 | caller clean it up when finished with it. */ | |
6689 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 6690 | |
365156ad TT |
6691 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6692 | So we have to manually free the abbrev table. */ | |
6693 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 6694 | |
365156ad TT |
6695 | /* Link this CU into read_in_chain. */ |
6696 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6697 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6698 | } | |
6699 | else | |
6700 | do_cleanups (free_cu_cleanup); | |
348e048f | 6701 | } |
365156ad TT |
6702 | |
6703 | do_cleanups (cleanups); | |
dee91e82 DE |
6704 | } |
6705 | ||
33e80786 DE |
6706 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
6707 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
6708 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6709 | |
6710 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6711 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6712 | |
6713 | We fill in THIS_CU->length. | |
6714 | ||
6715 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
6716 | linker) then DIE_READER_FUNC will not get called. | |
6717 | ||
6718 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6719 | This is done in order to not leave THIS_CU->cu in a state where we have |
6720 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
6721 | |
6722 | static void | |
6723 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 6724 | struct dwo_file *dwo_file, |
dee91e82 DE |
6725 | die_reader_func_ftype *die_reader_func, |
6726 | void *data) | |
6727 | { | |
6728 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 6729 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6730 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 6731 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 6732 | struct dwarf2_cu cu; |
d521ce57 | 6733 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
6734 | struct die_reader_specs reader; |
6735 | struct cleanup *cleanups; | |
6736 | struct die_info *comp_unit_die; | |
6737 | int has_children; | |
6738 | ||
b4f54984 | 6739 | if (dwarf_die_debug) |
09406207 DE |
6740 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6741 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6742 | to_underlying (this_cu->sect_off)); |
09406207 | 6743 | |
dee91e82 DE |
6744 | gdb_assert (this_cu->cu == NULL); |
6745 | ||
33e80786 DE |
6746 | abbrev_section = (dwo_file != NULL |
6747 | ? &dwo_file->sections.abbrev | |
6748 | : get_abbrev_section_for_cu (this_cu)); | |
6749 | ||
dee91e82 DE |
6750 | /* This is cheap if the section is already read in. */ |
6751 | dwarf2_read_section (objfile, section); | |
6752 | ||
6753 | init_one_comp_unit (&cu, this_cu); | |
6754 | ||
6755 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
6756 | ||
9c541725 | 6757 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
6758 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
6759 | abbrev_section, info_ptr, | |
43988095 JK |
6760 | (this_cu->is_debug_types |
6761 | ? rcuh_kind::TYPE | |
6762 | : rcuh_kind::COMPILE)); | |
dee91e82 | 6763 | |
1ce1cefd | 6764 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
6765 | |
6766 | /* Skip dummy compilation units. */ | |
6767 | if (info_ptr >= begin_info_ptr + this_cu->length | |
6768 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 6769 | { |
dee91e82 | 6770 | do_cleanups (cleanups); |
21b2bd31 | 6771 | return; |
93311388 | 6772 | } |
72bf9492 | 6773 | |
dee91e82 DE |
6774 | dwarf2_read_abbrevs (&cu, abbrev_section); |
6775 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
6776 | ||
3019eac3 | 6777 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
6778 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
6779 | ||
6780 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6781 | ||
6782 | do_cleanups (cleanups); | |
6783 | } | |
6784 | ||
3019eac3 DE |
6785 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
6786 | does not lookup the specified DWO file. | |
6787 | This cannot be used to read DWO files. | |
dee91e82 DE |
6788 | |
6789 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6790 | This is done in order to not leave THIS_CU->cu in a state where we have |
6791 | to care whether it refers to the "main" CU or the DWO CU. | |
6792 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
6793 | |
6794 | static void | |
6795 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
6796 | die_reader_func_ftype *die_reader_func, | |
6797 | void *data) | |
6798 | { | |
33e80786 | 6799 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 6800 | } |
0018ea6f DE |
6801 | \f |
6802 | /* Type Unit Groups. | |
dee91e82 | 6803 | |
0018ea6f DE |
6804 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
6805 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
6806 | so that all types coming from the same compilation (.o file) are grouped | |
6807 | together. A future step could be to put the types in the same symtab as | |
6808 | the CU the types ultimately came from. */ | |
ff013f42 | 6809 | |
f4dc4d17 DE |
6810 | static hashval_t |
6811 | hash_type_unit_group (const void *item) | |
6812 | { | |
9a3c8263 SM |
6813 | const struct type_unit_group *tu_group |
6814 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6815 | |
094b34ac | 6816 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6817 | } |
348e048f DE |
6818 | |
6819 | static int | |
f4dc4d17 | 6820 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6821 | { |
9a3c8263 SM |
6822 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6823 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6824 | |
094b34ac | 6825 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6826 | } |
348e048f | 6827 | |
f4dc4d17 DE |
6828 | /* Allocate a hash table for type unit groups. */ |
6829 | ||
6830 | static htab_t | |
6831 | allocate_type_unit_groups_table (void) | |
6832 | { | |
6833 | return htab_create_alloc_ex (3, | |
6834 | hash_type_unit_group, | |
6835 | eq_type_unit_group, | |
6836 | NULL, | |
6837 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6838 | hashtab_obstack_allocate, | |
6839 | dummy_obstack_deallocate); | |
6840 | } | |
dee91e82 | 6841 | |
f4dc4d17 DE |
6842 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6843 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6844 | of any one psymtab grow too big. */ | |
6845 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6846 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6847 | |
094b34ac | 6848 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6849 | Create the type_unit_group object used to hold one or more TUs. */ |
6850 | ||
6851 | static struct type_unit_group * | |
094b34ac | 6852 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6853 | { |
6854 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6855 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6856 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6857 | |
6858 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6859 | struct type_unit_group); | |
094b34ac | 6860 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6861 | per_cu->objfile = objfile; |
f4dc4d17 | 6862 | |
094b34ac DE |
6863 | if (dwarf2_per_objfile->using_index) |
6864 | { | |
6865 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6866 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6867 | } |
6868 | else | |
6869 | { | |
9c541725 | 6870 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6871 | struct partial_symtab *pst; |
6872 | char *name; | |
6873 | ||
6874 | /* Give the symtab a useful name for debug purposes. */ | |
6875 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6876 | name = xstrprintf ("<type_units_%d>", | |
6877 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6878 | else | |
6879 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6880 | ||
6881 | pst = create_partial_symtab (per_cu, name); | |
6882 | pst->anonymous = 1; | |
f4dc4d17 | 6883 | |
094b34ac DE |
6884 | xfree (name); |
6885 | } | |
f4dc4d17 | 6886 | |
094b34ac | 6887 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6888 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6889 | |
6890 | return tu_group; | |
6891 | } | |
6892 | ||
094b34ac DE |
6893 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6894 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6895 | |
6896 | static struct type_unit_group * | |
ff39bb5e | 6897 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6898 | { |
6899 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6900 | struct type_unit_group *tu_group; | |
6901 | void **slot; | |
6902 | unsigned int line_offset; | |
6903 | struct type_unit_group type_unit_group_for_lookup; | |
6904 | ||
6905 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6906 | { | |
6907 | dwarf2_per_objfile->type_unit_groups = | |
6908 | allocate_type_unit_groups_table (); | |
6909 | } | |
6910 | ||
6911 | /* Do we need to create a new group, or can we use an existing one? */ | |
6912 | ||
6913 | if (stmt_list) | |
6914 | { | |
6915 | line_offset = DW_UNSND (stmt_list); | |
6916 | ++tu_stats->nr_symtab_sharers; | |
6917 | } | |
6918 | else | |
6919 | { | |
6920 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6921 | We can do various things here like create one group per TU or | |
6922 | spread them over multiple groups to split up the expansion work. | |
6923 | To avoid worst case scenarios (too many groups or too large groups) | |
6924 | we, umm, group them in bunches. */ | |
6925 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6926 | | (tu_stats->nr_stmt_less_type_units | |
6927 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6928 | ++tu_stats->nr_stmt_less_type_units; | |
6929 | } | |
6930 | ||
094b34ac | 6931 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6932 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6933 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6934 | &type_unit_group_for_lookup, INSERT); | |
6935 | if (*slot != NULL) | |
6936 | { | |
9a3c8263 | 6937 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6938 | gdb_assert (tu_group != NULL); |
6939 | } | |
6940 | else | |
6941 | { | |
9c541725 | 6942 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6943 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6944 | *slot = tu_group; |
6945 | ++tu_stats->nr_symtabs; | |
6946 | } | |
6947 | ||
6948 | return tu_group; | |
6949 | } | |
0018ea6f DE |
6950 | \f |
6951 | /* Partial symbol tables. */ | |
6952 | ||
6953 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6954 | ||
6955 | The caller must fill in the following details: | |
6956 | dirname, textlow, texthigh. */ | |
6957 | ||
6958 | static struct partial_symtab * | |
6959 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
6960 | { | |
6961 | struct objfile *objfile = per_cu->objfile; | |
6962 | struct partial_symtab *pst; | |
6963 | ||
18a94d75 | 6964 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
6965 | objfile->global_psymbols, |
6966 | objfile->static_psymbols); | |
0018ea6f DE |
6967 | |
6968 | pst->psymtabs_addrmap_supported = 1; | |
6969 | ||
6970 | /* This is the glue that links PST into GDB's symbol API. */ | |
6971 | pst->read_symtab_private = per_cu; | |
6972 | pst->read_symtab = dwarf2_read_symtab; | |
6973 | per_cu->v.psymtab = pst; | |
6974 | ||
6975 | return pst; | |
6976 | } | |
6977 | ||
b93601f3 TT |
6978 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
6979 | type. */ | |
6980 | ||
6981 | struct process_psymtab_comp_unit_data | |
6982 | { | |
6983 | /* True if we are reading a DW_TAG_partial_unit. */ | |
6984 | ||
6985 | int want_partial_unit; | |
6986 | ||
6987 | /* The "pretend" language that is used if the CU doesn't declare a | |
6988 | language. */ | |
6989 | ||
6990 | enum language pretend_language; | |
6991 | }; | |
6992 | ||
0018ea6f DE |
6993 | /* die_reader_func for process_psymtab_comp_unit. */ |
6994 | ||
6995 | static void | |
6996 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6997 | const gdb_byte *info_ptr, |
0018ea6f DE |
6998 | struct die_info *comp_unit_die, |
6999 | int has_children, | |
7000 | void *data) | |
7001 | { | |
7002 | struct dwarf2_cu *cu = reader->cu; | |
7003 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 7004 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7005 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7006 | CORE_ADDR baseaddr; |
7007 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
7008 | struct partial_symtab *pst; | |
3a2b436a | 7009 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7010 | const char *filename; |
9a3c8263 SM |
7011 | struct process_psymtab_comp_unit_data *info |
7012 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 7013 | |
b93601f3 | 7014 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
7015 | return; |
7016 | ||
7017 | gdb_assert (! per_cu->is_debug_types); | |
7018 | ||
b93601f3 | 7019 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
7020 | |
7021 | cu->list_in_scope = &file_symbols; | |
7022 | ||
7023 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
7024 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7025 | if (filename == NULL) | |
0018ea6f | 7026 | filename = ""; |
0018ea6f DE |
7027 | |
7028 | pst = create_partial_symtab (per_cu, filename); | |
7029 | ||
7030 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7031 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
7032 | |
7033 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7034 | ||
7035 | dwarf2_find_base_address (comp_unit_die, cu); | |
7036 | ||
7037 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7038 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7039 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7040 | &best_highpc, cu, pst); | |
7041 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
7042 | /* Store the contiguous range if it is not empty; it can be empty for |
7043 | CUs with no code. */ | |
7044 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
7045 | gdbarch_adjust_dwarf2_addr (gdbarch, |
7046 | best_lowpc + baseaddr), | |
7047 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
7048 | best_highpc + baseaddr) - 1, | |
7049 | pst); | |
0018ea6f DE |
7050 | |
7051 | /* Check if comp unit has_children. | |
7052 | If so, read the rest of the partial symbols from this comp unit. | |
7053 | If not, there's no more debug_info for this comp unit. */ | |
7054 | if (has_children) | |
7055 | { | |
7056 | struct partial_die_info *first_die; | |
7057 | CORE_ADDR lowpc, highpc; | |
7058 | ||
7059 | lowpc = ((CORE_ADDR) -1); | |
7060 | highpc = ((CORE_ADDR) 0); | |
7061 | ||
7062 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7063 | ||
7064 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7065 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7066 | |
7067 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7068 | complaints from `maint check'. */ | |
7069 | if (lowpc == ((CORE_ADDR) -1)) | |
7070 | lowpc = highpc; | |
7071 | ||
7072 | /* If the compilation unit didn't have an explicit address range, | |
7073 | then use the information extracted from its child dies. */ | |
e385593e | 7074 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7075 | { |
7076 | best_lowpc = lowpc; | |
7077 | best_highpc = highpc; | |
7078 | } | |
7079 | } | |
3e29f34a MR |
7080 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
7081 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 7082 | |
8763cede | 7083 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
7084 | |
7085 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
7086 | { | |
7087 | int i; | |
7088 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7089 | struct dwarf2_per_cu_data *iter; | |
7090 | ||
7091 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7092 | post-pass. */ | |
7093 | pst->number_of_dependencies = len; | |
8d749320 SM |
7094 | pst->dependencies = |
7095 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
7096 | for (i = 0; |
7097 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
7098 | i, iter); | |
7099 | ++i) | |
7100 | pst->dependencies[i] = iter->v.psymtab; | |
7101 | ||
7102 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7103 | } | |
7104 | ||
7105 | /* Get the list of files included in the current compilation unit, | |
7106 | and build a psymtab for each of them. */ | |
7107 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7108 | ||
b4f54984 | 7109 | if (dwarf_read_debug) |
0018ea6f DE |
7110 | { |
7111 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
7112 | ||
7113 | fprintf_unfiltered (gdb_stdlog, | |
7114 | "Psymtab for %s unit @0x%x: %s - %s" | |
7115 | ", %d global, %d static syms\n", | |
7116 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 7117 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
7118 | paddress (gdbarch, pst->textlow), |
7119 | paddress (gdbarch, pst->texthigh), | |
7120 | pst->n_global_syms, pst->n_static_syms); | |
7121 | } | |
7122 | } | |
7123 | ||
7124 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7125 | Process compilation unit THIS_CU for a psymtab. */ | |
7126 | ||
7127 | static void | |
7128 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
7129 | int want_partial_unit, |
7130 | enum language pretend_language) | |
0018ea6f DE |
7131 | { |
7132 | /* If this compilation unit was already read in, free the | |
7133 | cached copy in order to read it in again. This is | |
7134 | necessary because we skipped some symbols when we first | |
7135 | read in the compilation unit (see load_partial_dies). | |
7136 | This problem could be avoided, but the benefit is unclear. */ | |
7137 | if (this_cu->cu != NULL) | |
7138 | free_one_cached_comp_unit (this_cu); | |
7139 | ||
f1902523 JK |
7140 | if (this_cu->is_debug_types) |
7141 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
7142 | NULL); | |
7143 | else | |
7144 | { | |
7145 | process_psymtab_comp_unit_data info; | |
7146 | info.want_partial_unit = want_partial_unit; | |
7147 | info.pretend_language = pretend_language; | |
7148 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
7149 | process_psymtab_comp_unit_reader, &info); | |
7150 | } | |
0018ea6f DE |
7151 | |
7152 | /* Age out any secondary CUs. */ | |
7153 | age_cached_comp_units (); | |
7154 | } | |
f4dc4d17 DE |
7155 | |
7156 | /* Reader function for build_type_psymtabs. */ | |
7157 | ||
7158 | static void | |
7159 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7160 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
7161 | struct die_info *type_unit_die, |
7162 | int has_children, | |
7163 | void *data) | |
7164 | { | |
7165 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7166 | struct dwarf2_cu *cu = reader->cu; | |
7167 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7168 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7169 | struct type_unit_group *tu_group; |
7170 | struct attribute *attr; | |
7171 | struct partial_die_info *first_die; | |
7172 | CORE_ADDR lowpc, highpc; | |
7173 | struct partial_symtab *pst; | |
7174 | ||
7175 | gdb_assert (data == NULL); | |
0186c6a7 DE |
7176 | gdb_assert (per_cu->is_debug_types); |
7177 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7178 | |
7179 | if (! has_children) | |
7180 | return; | |
7181 | ||
7182 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 7183 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7184 | |
0186c6a7 | 7185 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
7186 | |
7187 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
7188 | cu->list_in_scope = &file_symbols; | |
7189 | pst = create_partial_symtab (per_cu, ""); | |
7190 | pst->anonymous = 1; | |
7191 | ||
7192 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7193 | ||
7194 | lowpc = (CORE_ADDR) -1; | |
7195 | highpc = (CORE_ADDR) 0; | |
7196 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7197 | ||
8763cede | 7198 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
7199 | } |
7200 | ||
73051182 DE |
7201 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7202 | ||
7203 | struct tu_abbrev_offset | |
7204 | { | |
7205 | struct signatured_type *sig_type; | |
7206 | sect_offset abbrev_offset; | |
7207 | }; | |
7208 | ||
7209 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
7210 | ||
7211 | static int | |
7212 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
7213 | { | |
9a3c8263 SM |
7214 | const struct tu_abbrev_offset * const *a |
7215 | = (const struct tu_abbrev_offset * const*) ap; | |
7216 | const struct tu_abbrev_offset * const *b | |
7217 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
7218 | sect_offset aoff = (*a)->abbrev_offset; |
7219 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
7220 | |
7221 | return (aoff > boff) - (aoff < boff); | |
7222 | } | |
7223 | ||
7224 | /* Efficiently read all the type units. | |
7225 | This does the bulk of the work for build_type_psymtabs. | |
7226 | ||
7227 | The efficiency is because we sort TUs by the abbrev table they use and | |
7228 | only read each abbrev table once. In one program there are 200K TUs | |
7229 | sharing 8K abbrev tables. | |
7230 | ||
7231 | The main purpose of this function is to support building the | |
7232 | dwarf2_per_objfile->type_unit_groups table. | |
7233 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7234 | can collapse the search space by grouping them by stmt_list. | |
7235 | The savings can be significant, in the same program from above the 200K TUs | |
7236 | share 8K stmt_list tables. | |
7237 | ||
7238 | FUNC is expected to call get_type_unit_group, which will create the | |
7239 | struct type_unit_group if necessary and add it to | |
7240 | dwarf2_per_objfile->type_unit_groups. */ | |
7241 | ||
7242 | static void | |
7243 | build_type_psymtabs_1 (void) | |
7244 | { | |
73051182 DE |
7245 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7246 | struct cleanup *cleanups; | |
7247 | struct abbrev_table *abbrev_table; | |
7248 | sect_offset abbrev_offset; | |
7249 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
7250 | int i; |
7251 | ||
7252 | /* It's up to the caller to not call us multiple times. */ | |
7253 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7254 | ||
7255 | if (dwarf2_per_objfile->n_type_units == 0) | |
7256 | return; | |
7257 | ||
7258 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7259 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7260 | read each abbrev table in. | |
7261 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7262 | This is simpler and efficient enough for now. | |
7263 | ||
7264 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7265 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7266 | stmt_list value too so in practice this should work well. | |
7267 | ||
7268 | The basic algorithm here is: | |
7269 | ||
7270 | sort TUs by abbrev table | |
7271 | for each TU with same abbrev table: | |
7272 | read abbrev table if first user | |
7273 | read TU top level DIE | |
7274 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7275 | call FUNC */ | |
7276 | ||
b4f54984 | 7277 | if (dwarf_read_debug) |
73051182 DE |
7278 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7279 | ||
7280 | /* Sort in a separate table to maintain the order of all_type_units | |
7281 | for .gdb_index: TU indices directly index all_type_units. */ | |
7282 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
7283 | dwarf2_per_objfile->n_type_units); | |
7284 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7285 | { | |
7286 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
7287 | ||
7288 | sorted_by_abbrev[i].sig_type = sig_type; | |
7289 | sorted_by_abbrev[i].abbrev_offset = | |
7290 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 7291 | sig_type->per_cu.sect_off); |
73051182 DE |
7292 | } |
7293 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
7294 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
7295 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
7296 | ||
9c541725 | 7297 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
7298 | abbrev_table = NULL; |
7299 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
7300 | ||
7301 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7302 | { | |
7303 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
7304 | ||
7305 | /* Switch to the next abbrev table if necessary. */ | |
7306 | if (abbrev_table == NULL | |
9c541725 | 7307 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
7308 | { |
7309 | if (abbrev_table != NULL) | |
7310 | { | |
7311 | abbrev_table_free (abbrev_table); | |
7312 | /* Reset to NULL in case abbrev_table_read_table throws | |
7313 | an error: abbrev_table_free_cleanup will get called. */ | |
7314 | abbrev_table = NULL; | |
7315 | } | |
7316 | abbrev_offset = tu->abbrev_offset; | |
7317 | abbrev_table = | |
7318 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
7319 | abbrev_offset); | |
7320 | ++tu_stats->nr_uniq_abbrev_tables; | |
7321 | } | |
7322 | ||
7323 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
7324 | build_type_psymtabs_reader, NULL); | |
7325 | } | |
7326 | ||
73051182 | 7327 | do_cleanups (cleanups); |
6aa5f3a6 | 7328 | } |
73051182 | 7329 | |
6aa5f3a6 DE |
7330 | /* Print collected type unit statistics. */ |
7331 | ||
7332 | static void | |
7333 | print_tu_stats (void) | |
7334 | { | |
7335 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7336 | ||
7337 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
7338 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
7339 | dwarf2_per_objfile->n_type_units); | |
7340 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
7341 | tu_stats->nr_uniq_abbrev_tables); | |
7342 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7343 | tu_stats->nr_symtabs); | |
7344 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7345 | tu_stats->nr_symtab_sharers); | |
7346 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7347 | tu_stats->nr_stmt_less_type_units); | |
7348 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7349 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7350 | } |
7351 | ||
f4dc4d17 DE |
7352 | /* Traversal function for build_type_psymtabs. */ |
7353 | ||
7354 | static int | |
7355 | build_type_psymtab_dependencies (void **slot, void *info) | |
7356 | { | |
7357 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7358 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7359 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 7360 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
7361 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
7362 | struct signatured_type *iter; | |
f4dc4d17 DE |
7363 | int i; |
7364 | ||
7365 | gdb_assert (len > 0); | |
0186c6a7 | 7366 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
7367 | |
7368 | pst->number_of_dependencies = len; | |
8d749320 SM |
7369 | pst->dependencies = |
7370 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 7371 | for (i = 0; |
0186c6a7 | 7372 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
7373 | ++i) |
7374 | { | |
0186c6a7 DE |
7375 | gdb_assert (iter->per_cu.is_debug_types); |
7376 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7377 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7378 | } |
7379 | ||
0186c6a7 | 7380 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
7381 | |
7382 | return 1; | |
7383 | } | |
7384 | ||
7385 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7386 | Build partial symbol tables for the .debug_types comp-units. */ | |
7387 | ||
7388 | static void | |
7389 | build_type_psymtabs (struct objfile *objfile) | |
7390 | { | |
0e50663e | 7391 | if (! create_all_type_units (objfile)) |
348e048f DE |
7392 | return; |
7393 | ||
73051182 | 7394 | build_type_psymtabs_1 (); |
6aa5f3a6 | 7395 | } |
f4dc4d17 | 7396 | |
6aa5f3a6 DE |
7397 | /* Traversal function for process_skeletonless_type_unit. |
7398 | Read a TU in a DWO file and build partial symbols for it. */ | |
7399 | ||
7400 | static int | |
7401 | process_skeletonless_type_unit (void **slot, void *info) | |
7402 | { | |
7403 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 7404 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
7405 | struct signatured_type find_entry, *entry; |
7406 | ||
7407 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7408 | ||
7409 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7410 | { | |
7411 | dwarf2_per_objfile->signatured_types | |
7412 | = allocate_signatured_type_table (objfile); | |
7413 | } | |
7414 | ||
7415 | find_entry.signature = dwo_unit->signature; | |
7416 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
7417 | INSERT); | |
7418 | /* If we've already seen this type there's nothing to do. What's happening | |
7419 | is we're doing our own version of comdat-folding here. */ | |
7420 | if (*slot != NULL) | |
7421 | return 1; | |
7422 | ||
7423 | /* This does the job that create_all_type_units would have done for | |
7424 | this TU. */ | |
7425 | entry = add_type_unit (dwo_unit->signature, slot); | |
7426 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
7427 | *slot = entry; | |
7428 | ||
7429 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
7430 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
7431 | build_type_psymtabs_reader, NULL); | |
7432 | ||
7433 | return 1; | |
7434 | } | |
7435 | ||
7436 | /* Traversal function for process_skeletonless_type_units. */ | |
7437 | ||
7438 | static int | |
7439 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7440 | { | |
7441 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7442 | ||
7443 | if (dwo_file->tus != NULL) | |
7444 | { | |
7445 | htab_traverse_noresize (dwo_file->tus, | |
7446 | process_skeletonless_type_unit, info); | |
7447 | } | |
7448 | ||
7449 | return 1; | |
7450 | } | |
7451 | ||
7452 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7453 | This is needed in case a TU was emitted without its skeleton. | |
7454 | Note: This can't be done until we know what all the DWO files are. */ | |
7455 | ||
7456 | static void | |
7457 | process_skeletonless_type_units (struct objfile *objfile) | |
7458 | { | |
7459 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
7460 | if (get_dwp_file () == NULL | |
7461 | && dwarf2_per_objfile->dwo_files != NULL) | |
7462 | { | |
7463 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
7464 | process_dwo_file_for_skeletonless_type_units, | |
7465 | objfile); | |
7466 | } | |
348e048f DE |
7467 | } |
7468 | ||
95554aad TT |
7469 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
7470 | ||
7471 | static void | |
7472 | set_partial_user (struct objfile *objfile) | |
7473 | { | |
7474 | int i; | |
7475 | ||
7476 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
7477 | { | |
8832e7e3 | 7478 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
7479 | struct partial_symtab *pst = per_cu->v.psymtab; |
7480 | int j; | |
7481 | ||
36586728 TT |
7482 | if (pst == NULL) |
7483 | continue; | |
7484 | ||
95554aad TT |
7485 | for (j = 0; j < pst->number_of_dependencies; ++j) |
7486 | { | |
7487 | /* Set the 'user' field only if it is not already set. */ | |
7488 | if (pst->dependencies[j]->user == NULL) | |
7489 | pst->dependencies[j]->user = pst; | |
7490 | } | |
7491 | } | |
7492 | } | |
7493 | ||
93311388 DE |
7494 | /* Build the partial symbol table by doing a quick pass through the |
7495 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7496 | |
93311388 | 7497 | static void |
c67a9c90 | 7498 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 7499 | { |
791afaa2 | 7500 | struct cleanup *back_to; |
21b2bd31 | 7501 | int i; |
93311388 | 7502 | |
b4f54984 | 7503 | if (dwarf_read_debug) |
45cfd468 DE |
7504 | { |
7505 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7506 | objfile_name (objfile)); |
45cfd468 DE |
7507 | } |
7508 | ||
98bfdba5 PA |
7509 | dwarf2_per_objfile->reading_partial_symbols = 1; |
7510 | ||
be391dca | 7511 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 7512 | |
93311388 DE |
7513 | /* Any cached compilation units will be linked by the per-objfile |
7514 | read_in_chain. Make sure to free them when we're done. */ | |
7515 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 7516 | |
348e048f DE |
7517 | build_type_psymtabs (objfile); |
7518 | ||
93311388 | 7519 | create_all_comp_units (objfile); |
c906108c | 7520 | |
60606b2c TT |
7521 | /* Create a temporary address map on a temporary obstack. We later |
7522 | copy this to the final obstack. */ | |
8268c778 | 7523 | auto_obstack temp_obstack; |
791afaa2 TT |
7524 | |
7525 | scoped_restore save_psymtabs_addrmap | |
7526 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
7527 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 7528 | |
21b2bd31 | 7529 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 7530 | { |
8832e7e3 | 7531 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 7532 | |
b93601f3 | 7533 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 7534 | } |
ff013f42 | 7535 | |
6aa5f3a6 DE |
7536 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
7537 | process_skeletonless_type_units (objfile); | |
7538 | ||
7539 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7540 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7541 | { | |
7542 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
7543 | build_type_psymtab_dependencies, NULL); | |
7544 | } | |
7545 | ||
b4f54984 | 7546 | if (dwarf_read_debug) |
6aa5f3a6 DE |
7547 | print_tu_stats (); |
7548 | ||
95554aad TT |
7549 | set_partial_user (objfile); |
7550 | ||
ff013f42 JK |
7551 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
7552 | &objfile->objfile_obstack); | |
791afaa2 TT |
7553 | /* At this point we want to keep the address map. */ |
7554 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7555 | |
ae038cb0 | 7556 | do_cleanups (back_to); |
45cfd468 | 7557 | |
b4f54984 | 7558 | if (dwarf_read_debug) |
45cfd468 | 7559 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7560 | objfile_name (objfile)); |
ae038cb0 DJ |
7561 | } |
7562 | ||
3019eac3 | 7563 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
7564 | |
7565 | static void | |
dee91e82 | 7566 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 7567 | const gdb_byte *info_ptr, |
dee91e82 DE |
7568 | struct die_info *comp_unit_die, |
7569 | int has_children, | |
7570 | void *data) | |
ae038cb0 | 7571 | { |
dee91e82 | 7572 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 7573 | |
95554aad | 7574 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 7575 | |
ae038cb0 DJ |
7576 | /* Check if comp unit has_children. |
7577 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 7578 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 7579 | if (has_children) |
dee91e82 DE |
7580 | load_partial_dies (reader, info_ptr, 0); |
7581 | } | |
98bfdba5 | 7582 | |
dee91e82 DE |
7583 | /* Load the partial DIEs for a secondary CU into memory. |
7584 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7585 | |
dee91e82 DE |
7586 | static void |
7587 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7588 | { | |
f4dc4d17 DE |
7589 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7590 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
7591 | } |
7592 | ||
ae038cb0 | 7593 | static void |
36586728 TT |
7594 | read_comp_units_from_section (struct objfile *objfile, |
7595 | struct dwarf2_section_info *section, | |
f1902523 | 7596 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
7597 | unsigned int is_dwz, |
7598 | int *n_allocated, | |
7599 | int *n_comp_units, | |
7600 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 7601 | { |
d521ce57 | 7602 | const gdb_byte *info_ptr; |
a32a8923 | 7603 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 7604 | |
b4f54984 | 7605 | if (dwarf_read_debug) |
bf6af496 | 7606 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
7607 | get_section_name (section), |
7608 | get_section_file_name (section)); | |
bf6af496 | 7609 | |
36586728 | 7610 | dwarf2_read_section (objfile, section); |
ae038cb0 | 7611 | |
36586728 | 7612 | info_ptr = section->buffer; |
6e70227d | 7613 | |
36586728 | 7614 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7615 | { |
ae038cb0 | 7616 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7617 | |
9c541725 | 7618 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7619 | |
f1902523 JK |
7620 | comp_unit_head cu_header; |
7621 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
7622 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7623 | |
7624 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7625 | if (cu_header.unit_type != DW_UT_type) |
7626 | { | |
7627 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7628 | struct dwarf2_per_cu_data); | |
7629 | memset (this_cu, 0, sizeof (*this_cu)); | |
7630 | } | |
7631 | else | |
7632 | { | |
7633 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7634 | struct signatured_type); | |
7635 | memset (sig_type, 0, sizeof (*sig_type)); | |
7636 | sig_type->signature = cu_header.signature; | |
7637 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7638 | this_cu = &sig_type->per_cu; | |
7639 | } | |
7640 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7641 | this_cu->sect_off = sect_off; |
f1902523 | 7642 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7643 | this_cu->is_dwz = is_dwz; |
9291a0cd | 7644 | this_cu->objfile = objfile; |
8a0459fd | 7645 | this_cu->section = section; |
ae038cb0 | 7646 | |
36586728 | 7647 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 7648 | { |
36586728 | 7649 | *n_allocated *= 2; |
224c3ddb SM |
7650 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
7651 | *all_comp_units, *n_allocated); | |
ae038cb0 | 7652 | } |
36586728 TT |
7653 | (*all_comp_units)[*n_comp_units] = this_cu; |
7654 | ++*n_comp_units; | |
ae038cb0 DJ |
7655 | |
7656 | info_ptr = info_ptr + this_cu->length; | |
7657 | } | |
36586728 TT |
7658 | } |
7659 | ||
7660 | /* Create a list of all compilation units in OBJFILE. | |
7661 | This is only done for -readnow and building partial symtabs. */ | |
7662 | ||
7663 | static void | |
7664 | create_all_comp_units (struct objfile *objfile) | |
7665 | { | |
7666 | int n_allocated; | |
7667 | int n_comp_units; | |
7668 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 7669 | struct dwz_file *dwz; |
36586728 TT |
7670 | |
7671 | n_comp_units = 0; | |
7672 | n_allocated = 10; | |
8d749320 | 7673 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 7674 | |
f1902523 JK |
7675 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
7676 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
7677 | &n_allocated, &n_comp_units, &all_comp_units); |
7678 | ||
4db1a1dc TT |
7679 | dwz = dwarf2_get_dwz_file (); |
7680 | if (dwz != NULL) | |
f1902523 | 7681 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
7682 | &n_allocated, &n_comp_units, |
7683 | &all_comp_units); | |
ae038cb0 | 7684 | |
8d749320 SM |
7685 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
7686 | struct dwarf2_per_cu_data *, | |
7687 | n_comp_units); | |
ae038cb0 DJ |
7688 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
7689 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
7690 | xfree (all_comp_units); | |
7691 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
7692 | } |
7693 | ||
5734ee8b | 7694 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7695 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7696 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7697 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7698 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7699 | |
72bf9492 DJ |
7700 | static void |
7701 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7702 | CORE_ADDR *highpc, int set_addrmap, |
7703 | struct dwarf2_cu *cu) | |
c906108c | 7704 | { |
72bf9492 | 7705 | struct partial_die_info *pdi; |
c906108c | 7706 | |
91c24f0a DC |
7707 | /* Now, march along the PDI's, descending into ones which have |
7708 | interesting children but skipping the children of the other ones, | |
7709 | until we reach the end of the compilation unit. */ | |
c906108c | 7710 | |
72bf9492 | 7711 | pdi = first_die; |
91c24f0a | 7712 | |
72bf9492 DJ |
7713 | while (pdi != NULL) |
7714 | { | |
7715 | fixup_partial_die (pdi, cu); | |
c906108c | 7716 | |
f55ee35c | 7717 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7718 | children, so we need to look at them. Ditto for anonymous |
7719 | enums. */ | |
933c6fe4 | 7720 | |
72bf9492 | 7721 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
7722 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
7723 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 7724 | { |
72bf9492 | 7725 | switch (pdi->tag) |
c906108c SS |
7726 | { |
7727 | case DW_TAG_subprogram: | |
cdc07690 | 7728 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7729 | break; |
72929c62 | 7730 | case DW_TAG_constant: |
c906108c SS |
7731 | case DW_TAG_variable: |
7732 | case DW_TAG_typedef: | |
91c24f0a | 7733 | case DW_TAG_union_type: |
72bf9492 | 7734 | if (!pdi->is_declaration) |
63d06c5c | 7735 | { |
72bf9492 | 7736 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7737 | } |
7738 | break; | |
c906108c | 7739 | case DW_TAG_class_type: |
680b30c7 | 7740 | case DW_TAG_interface_type: |
c906108c | 7741 | case DW_TAG_structure_type: |
72bf9492 | 7742 | if (!pdi->is_declaration) |
c906108c | 7743 | { |
72bf9492 | 7744 | add_partial_symbol (pdi, cu); |
c906108c | 7745 | } |
e98c9e7c TT |
7746 | if (cu->language == language_rust && pdi->has_children) |
7747 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
7748 | set_addrmap, cu); | |
c906108c | 7749 | break; |
91c24f0a | 7750 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7751 | if (!pdi->is_declaration) |
7752 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7753 | break; |
7754 | case DW_TAG_base_type: | |
a02abb62 | 7755 | case DW_TAG_subrange_type: |
c906108c | 7756 | /* File scope base type definitions are added to the partial |
c5aa993b | 7757 | symbol table. */ |
72bf9492 | 7758 | add_partial_symbol (pdi, cu); |
c906108c | 7759 | break; |
d9fa45fe | 7760 | case DW_TAG_namespace: |
cdc07690 | 7761 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7762 | break; |
5d7cb8df | 7763 | case DW_TAG_module: |
cdc07690 | 7764 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 7765 | break; |
95554aad TT |
7766 | case DW_TAG_imported_unit: |
7767 | { | |
7768 | struct dwarf2_per_cu_data *per_cu; | |
7769 | ||
f4dc4d17 DE |
7770 | /* For now we don't handle imported units in type units. */ |
7771 | if (cu->per_cu->is_debug_types) | |
7772 | { | |
7773 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7774 | " supported in type units [in module %s]"), | |
4262abfb | 7775 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
7776 | } |
7777 | ||
9c541725 | 7778 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 7779 | pdi->is_dwz, |
95554aad TT |
7780 | cu->objfile); |
7781 | ||
7782 | /* Go read the partial unit, if needed. */ | |
7783 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 7784 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 7785 | |
f4dc4d17 | 7786 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 7787 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
7788 | } |
7789 | break; | |
74921315 KS |
7790 | case DW_TAG_imported_declaration: |
7791 | add_partial_symbol (pdi, cu); | |
7792 | break; | |
c906108c SS |
7793 | default: |
7794 | break; | |
7795 | } | |
7796 | } | |
7797 | ||
72bf9492 DJ |
7798 | /* If the die has a sibling, skip to the sibling. */ |
7799 | ||
7800 | pdi = pdi->die_sibling; | |
7801 | } | |
7802 | } | |
7803 | ||
7804 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7805 | |
72bf9492 | 7806 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7807 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7808 | Enumerators are an exception; they use the scope of their parent |
7809 | enumeration type, i.e. the name of the enumeration type is not | |
7810 | prepended to the enumerator. | |
91c24f0a | 7811 | |
72bf9492 DJ |
7812 | There are two complexities. One is DW_AT_specification; in this |
7813 | case "parent" means the parent of the target of the specification, | |
7814 | instead of the direct parent of the DIE. The other is compilers | |
7815 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7816 | the fully qualified name of structure types from their members' | |
7817 | linkage names. This must be done using the DIE's children rather | |
7818 | than the children of any DW_AT_specification target. We only need | |
7819 | to do this for structures at the top level, i.e. if the target of | |
7820 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7821 | have a parent. */ | |
7822 | ||
7823 | /* Compute the scope prefix associated with PDI's parent, in | |
7824 | compilation unit CU. The result will be allocated on CU's | |
7825 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7826 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7827 | static const char * |
72bf9492 DJ |
7828 | partial_die_parent_scope (struct partial_die_info *pdi, |
7829 | struct dwarf2_cu *cu) | |
7830 | { | |
15d034d0 | 7831 | const char *grandparent_scope; |
72bf9492 | 7832 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7833 | |
72bf9492 DJ |
7834 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7835 | then this means the parent of the specification DIE. */ | |
7836 | ||
7837 | real_pdi = pdi; | |
72bf9492 | 7838 | while (real_pdi->has_specification) |
36586728 TT |
7839 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7840 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7841 | |
7842 | parent = real_pdi->die_parent; | |
7843 | if (parent == NULL) | |
7844 | return NULL; | |
7845 | ||
7846 | if (parent->scope_set) | |
7847 | return parent->scope; | |
7848 | ||
7849 | fixup_partial_die (parent, cu); | |
7850 | ||
10b3939b | 7851 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7852 | |
acebe513 UW |
7853 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7854 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7855 | Work around this problem here. */ | |
7856 | if (cu->language == language_cplus | |
6e70227d | 7857 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7858 | && strcmp (parent->name, "::") == 0 |
7859 | && grandparent_scope == NULL) | |
7860 | { | |
7861 | parent->scope = NULL; | |
7862 | parent->scope_set = 1; | |
7863 | return NULL; | |
7864 | } | |
7865 | ||
9c6c53f7 SA |
7866 | if (pdi->tag == DW_TAG_enumerator) |
7867 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7868 | parent->scope = grandparent_scope; | |
7869 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7870 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7871 | || parent->tag == DW_TAG_structure_type |
7872 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7873 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7874 | || parent->tag == DW_TAG_union_type |
7875 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7876 | { |
7877 | if (grandparent_scope == NULL) | |
7878 | parent->scope = parent->name; | |
7879 | else | |
3e43a32a MS |
7880 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7881 | grandparent_scope, | |
f55ee35c | 7882 | parent->name, 0, cu); |
72bf9492 | 7883 | } |
72bf9492 DJ |
7884 | else |
7885 | { | |
7886 | /* FIXME drow/2004-04-01: What should we be doing with | |
7887 | function-local names? For partial symbols, we should probably be | |
7888 | ignoring them. */ | |
7889 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7890 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7891 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7892 | parent->scope = grandparent_scope; |
c906108c SS |
7893 | } |
7894 | ||
72bf9492 DJ |
7895 | parent->scope_set = 1; |
7896 | return parent->scope; | |
7897 | } | |
7898 | ||
7899 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7900 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7901 | |
72bf9492 DJ |
7902 | static char * |
7903 | partial_die_full_name (struct partial_die_info *pdi, | |
7904 | struct dwarf2_cu *cu) | |
7905 | { | |
15d034d0 | 7906 | const char *parent_scope; |
72bf9492 | 7907 | |
98bfdba5 PA |
7908 | /* If this is a template instantiation, we can not work out the |
7909 | template arguments from partial DIEs. So, unfortunately, we have | |
7910 | to go through the full DIEs. At least any work we do building | |
7911 | types here will be reused if full symbols are loaded later. */ | |
7912 | if (pdi->has_template_arguments) | |
7913 | { | |
7914 | fixup_partial_die (pdi, cu); | |
7915 | ||
7916 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7917 | { | |
7918 | struct die_info *die; | |
7919 | struct attribute attr; | |
7920 | struct dwarf2_cu *ref_cu = cu; | |
7921 | ||
b64f50a1 | 7922 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7923 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7924 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7925 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7926 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7927 | ||
7928 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7929 | } | |
7930 | } | |
7931 | ||
72bf9492 DJ |
7932 | parent_scope = partial_die_parent_scope (pdi, cu); |
7933 | if (parent_scope == NULL) | |
7934 | return NULL; | |
7935 | else | |
f55ee35c | 7936 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7937 | } |
7938 | ||
7939 | static void | |
72bf9492 | 7940 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7941 | { |
e7c27a73 | 7942 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7943 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7944 | CORE_ADDR addr = 0; |
15d034d0 | 7945 | const char *actual_name = NULL; |
e142c38c | 7946 | CORE_ADDR baseaddr; |
15d034d0 | 7947 | char *built_actual_name; |
e142c38c DJ |
7948 | |
7949 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7950 | |
15d034d0 TT |
7951 | built_actual_name = partial_die_full_name (pdi, cu); |
7952 | if (built_actual_name != NULL) | |
7953 | actual_name = built_actual_name; | |
63d06c5c | 7954 | |
72bf9492 DJ |
7955 | if (actual_name == NULL) |
7956 | actual_name = pdi->name; | |
7957 | ||
c906108c SS |
7958 | switch (pdi->tag) |
7959 | { | |
7960 | case DW_TAG_subprogram: | |
3e29f34a | 7961 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 7962 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 7963 | { |
2cfa0c8d JB |
7964 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
7965 | of the global scope. But in Ada, we want to be able to access | |
7966 | nested procedures globally. So all Ada subprograms are stored | |
7967 | in the global scope. */ | |
f47fb265 | 7968 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7969 | built_actual_name != NULL, |
f47fb265 MS |
7970 | VAR_DOMAIN, LOC_BLOCK, |
7971 | &objfile->global_psymbols, | |
1762568f | 7972 | addr, cu->language, objfile); |
c906108c SS |
7973 | } |
7974 | else | |
7975 | { | |
f47fb265 | 7976 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7977 | built_actual_name != NULL, |
f47fb265 MS |
7978 | VAR_DOMAIN, LOC_BLOCK, |
7979 | &objfile->static_psymbols, | |
1762568f | 7980 | addr, cu->language, objfile); |
c906108c | 7981 | } |
0c1b455e TT |
7982 | |
7983 | if (pdi->main_subprogram && actual_name != NULL) | |
7984 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7985 | break; |
72929c62 JB |
7986 | case DW_TAG_constant: |
7987 | { | |
af5bf4ad | 7988 | std::vector<partial_symbol *> *list; |
72929c62 JB |
7989 | |
7990 | if (pdi->is_external) | |
7991 | list = &objfile->global_psymbols; | |
7992 | else | |
7993 | list = &objfile->static_psymbols; | |
f47fb265 | 7994 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7995 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 7996 | list, 0, cu->language, objfile); |
72929c62 JB |
7997 | } |
7998 | break; | |
c906108c | 7999 | case DW_TAG_variable: |
95554aad TT |
8000 | if (pdi->d.locdesc) |
8001 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8002 | |
95554aad | 8003 | if (pdi->d.locdesc |
caac4577 JG |
8004 | && addr == 0 |
8005 | && !dwarf2_per_objfile->has_section_at_zero) | |
8006 | { | |
8007 | /* A global or static variable may also have been stripped | |
8008 | out by the linker if unused, in which case its address | |
8009 | will be nullified; do not add such variables into partial | |
8010 | symbol table then. */ | |
8011 | } | |
8012 | else if (pdi->is_external) | |
c906108c SS |
8013 | { |
8014 | /* Global Variable. | |
8015 | Don't enter into the minimal symbol tables as there is | |
8016 | a minimal symbol table entry from the ELF symbols already. | |
8017 | Enter into partial symbol table if it has a location | |
8018 | descriptor or a type. | |
8019 | If the location descriptor is missing, new_symbol will create | |
8020 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8021 | be determined from the minimal symbol table whenever the variable | |
8022 | is referenced. | |
8023 | The address for the partial symbol table entry is not | |
8024 | used by GDB, but it comes in handy for debugging partial symbol | |
8025 | table building. */ | |
8026 | ||
95554aad | 8027 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 8028 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8029 | built_actual_name != NULL, |
f47fb265 MS |
8030 | VAR_DOMAIN, LOC_STATIC, |
8031 | &objfile->global_psymbols, | |
1762568f | 8032 | addr + baseaddr, |
f47fb265 | 8033 | cu->language, objfile); |
c906108c SS |
8034 | } |
8035 | else | |
8036 | { | |
ff908ebf AW |
8037 | int has_loc = pdi->d.locdesc != NULL; |
8038 | ||
8039 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8040 | without location descriptors or constant values). */ | |
8041 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 8042 | { |
15d034d0 | 8043 | xfree (built_actual_name); |
decbce07 MS |
8044 | return; |
8045 | } | |
ff908ebf | 8046 | |
f47fb265 | 8047 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8048 | built_actual_name != NULL, |
f47fb265 MS |
8049 | VAR_DOMAIN, LOC_STATIC, |
8050 | &objfile->static_psymbols, | |
ff908ebf | 8051 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 8052 | cu->language, objfile); |
c906108c SS |
8053 | } |
8054 | break; | |
8055 | case DW_TAG_typedef: | |
8056 | case DW_TAG_base_type: | |
a02abb62 | 8057 | case DW_TAG_subrange_type: |
38d518c9 | 8058 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8059 | built_actual_name != NULL, |
176620f1 | 8060 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 8061 | &objfile->static_psymbols, |
1762568f | 8062 | 0, cu->language, objfile); |
c906108c | 8063 | break; |
74921315 | 8064 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
8065 | case DW_TAG_namespace: |
8066 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 8067 | built_actual_name != NULL, |
72bf9492 DJ |
8068 | VAR_DOMAIN, LOC_TYPEDEF, |
8069 | &objfile->global_psymbols, | |
1762568f | 8070 | 0, cu->language, objfile); |
72bf9492 | 8071 | break; |
530e8392 KB |
8072 | case DW_TAG_module: |
8073 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
8074 | built_actual_name != NULL, | |
8075 | MODULE_DOMAIN, LOC_TYPEDEF, | |
8076 | &objfile->global_psymbols, | |
1762568f | 8077 | 0, cu->language, objfile); |
530e8392 | 8078 | break; |
c906108c | 8079 | case DW_TAG_class_type: |
680b30c7 | 8080 | case DW_TAG_interface_type: |
c906108c SS |
8081 | case DW_TAG_structure_type: |
8082 | case DW_TAG_union_type: | |
8083 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8084 | /* Skip external references. The DWARF standard says in the section |
8085 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8086 | structure, union or class type is represented by a structure, | |
8087 | union or class entry that does not have a byte size attribute | |
8088 | and that has a DW_AT_declaration attribute." */ | |
8089 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 8090 | { |
15d034d0 | 8091 | xfree (built_actual_name); |
decbce07 MS |
8092 | return; |
8093 | } | |
fa4028e9 | 8094 | |
63d06c5c DC |
8095 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8096 | static vs. global. */ | |
38d518c9 | 8097 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8098 | built_actual_name != NULL, |
176620f1 | 8099 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 8100 | cu->language == language_cplus |
63d06c5c DC |
8101 | ? &objfile->global_psymbols |
8102 | : &objfile->static_psymbols, | |
1762568f | 8103 | 0, cu->language, objfile); |
c906108c | 8104 | |
c906108c SS |
8105 | break; |
8106 | case DW_TAG_enumerator: | |
38d518c9 | 8107 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8108 | built_actual_name != NULL, |
176620f1 | 8109 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 8110 | cu->language == language_cplus |
f6fe98ef DJ |
8111 | ? &objfile->global_psymbols |
8112 | : &objfile->static_psymbols, | |
1762568f | 8113 | 0, cu->language, objfile); |
c906108c SS |
8114 | break; |
8115 | default: | |
8116 | break; | |
8117 | } | |
5c4e30ca | 8118 | |
15d034d0 | 8119 | xfree (built_actual_name); |
c906108c SS |
8120 | } |
8121 | ||
5c4e30ca DC |
8122 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8123 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8124 | the name of the enclosing namespace. */ | |
91c24f0a | 8125 | |
72bf9492 DJ |
8126 | static void |
8127 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8128 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8129 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8130 | { |
72bf9492 | 8131 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8132 | |
72bf9492 | 8133 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8134 | |
8135 | /* Now scan partial symbols in that namespace. */ | |
8136 | ||
91c24f0a | 8137 | if (pdi->has_children) |
cdc07690 | 8138 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8139 | } |
8140 | ||
5d7cb8df JK |
8141 | /* Read a partial die corresponding to a Fortran module. */ |
8142 | ||
8143 | static void | |
8144 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8145 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8146 | { |
530e8392 KB |
8147 | /* Add a symbol for the namespace. */ |
8148 | ||
8149 | add_partial_symbol (pdi, cu); | |
8150 | ||
f55ee35c | 8151 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8152 | |
8153 | if (pdi->has_children) | |
cdc07690 | 8154 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8155 | } |
8156 | ||
bc30ff58 JB |
8157 | /* Read a partial die corresponding to a subprogram and create a partial |
8158 | symbol for that subprogram. When the CU language allows it, this | |
8159 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 8160 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
8161 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
8162 | and highest PC values found in PDI. | |
6e70227d | 8163 | |
cdc07690 YQ |
8164 | PDI may also be a lexical block, in which case we simply search |
8165 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8166 | Again, this is only performed when the CU language allows this |
8167 | type of definitions. */ | |
8168 | ||
8169 | static void | |
8170 | add_partial_subprogram (struct partial_die_info *pdi, | |
8171 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8172 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
8173 | { |
8174 | if (pdi->tag == DW_TAG_subprogram) | |
8175 | { | |
8176 | if (pdi->has_pc_info) | |
8177 | { | |
8178 | if (pdi->lowpc < *lowpc) | |
8179 | *lowpc = pdi->lowpc; | |
8180 | if (pdi->highpc > *highpc) | |
8181 | *highpc = pdi->highpc; | |
cdc07690 | 8182 | if (set_addrmap) |
5734ee8b | 8183 | { |
5734ee8b | 8184 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
8185 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
8186 | CORE_ADDR baseaddr; | |
8187 | CORE_ADDR highpc; | |
8188 | CORE_ADDR lowpc; | |
5734ee8b DJ |
8189 | |
8190 | baseaddr = ANOFFSET (objfile->section_offsets, | |
8191 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
8192 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
8193 | pdi->lowpc + baseaddr); | |
8194 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
8195 | pdi->highpc + baseaddr); | |
8196 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 8197 | cu->per_cu->v.psymtab); |
5734ee8b | 8198 | } |
481860b3 GB |
8199 | } |
8200 | ||
8201 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8202 | { | |
bc30ff58 | 8203 | if (!pdi->is_declaration) |
e8d05480 JB |
8204 | /* Ignore subprogram DIEs that do not have a name, they are |
8205 | illegal. Do not emit a complaint at this point, we will | |
8206 | do so when we convert this psymtab into a symtab. */ | |
8207 | if (pdi->name) | |
8208 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
8209 | } |
8210 | } | |
6e70227d | 8211 | |
bc30ff58 JB |
8212 | if (! pdi->has_children) |
8213 | return; | |
8214 | ||
8215 | if (cu->language == language_ada) | |
8216 | { | |
8217 | pdi = pdi->die_child; | |
8218 | while (pdi != NULL) | |
8219 | { | |
8220 | fixup_partial_die (pdi, cu); | |
8221 | if (pdi->tag == DW_TAG_subprogram | |
8222 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 8223 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8224 | pdi = pdi->die_sibling; |
8225 | } | |
8226 | } | |
8227 | } | |
8228 | ||
91c24f0a DC |
8229 | /* Read a partial die corresponding to an enumeration type. */ |
8230 | ||
72bf9492 DJ |
8231 | static void |
8232 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8233 | struct dwarf2_cu *cu) | |
91c24f0a | 8234 | { |
72bf9492 | 8235 | struct partial_die_info *pdi; |
91c24f0a DC |
8236 | |
8237 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8238 | add_partial_symbol (enum_pdi, cu); |
8239 | ||
8240 | pdi = enum_pdi->die_child; | |
8241 | while (pdi) | |
91c24f0a | 8242 | { |
72bf9492 | 8243 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 8244 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 8245 | else |
72bf9492 DJ |
8246 | add_partial_symbol (pdi, cu); |
8247 | pdi = pdi->die_sibling; | |
91c24f0a | 8248 | } |
91c24f0a DC |
8249 | } |
8250 | ||
6caca83c CC |
8251 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8252 | ||
8253 | static unsigned int | |
d521ce57 | 8254 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8255 | { |
8256 | unsigned int bytes_read; | |
8257 | ||
8258 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8259 | } | |
8260 | ||
4bb7a0a7 DJ |
8261 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
8262 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
8263 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8264 | the initial number. */ | |
8265 | ||
8266 | static struct abbrev_info * | |
d521ce57 | 8267 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 8268 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
8269 | { |
8270 | bfd *abfd = cu->objfile->obfd; | |
8271 | unsigned int abbrev_number; | |
8272 | struct abbrev_info *abbrev; | |
8273 | ||
8274 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
8275 | ||
8276 | if (abbrev_number == 0) | |
8277 | return NULL; | |
8278 | ||
433df2d4 | 8279 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
8280 | if (!abbrev) |
8281 | { | |
422b9917 DE |
8282 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
8283 | " at offset 0x%x [in module %s]"), | |
8284 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 8285 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8286 | } |
8287 | ||
8288 | return abbrev; | |
8289 | } | |
8290 | ||
93311388 DE |
8291 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8292 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8293 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8294 | ||
d521ce57 TT |
8295 | static const gdb_byte * |
8296 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8297 | { |
dee91e82 | 8298 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
8299 | struct abbrev_info *abbrev; |
8300 | unsigned int bytes_read; | |
8301 | ||
8302 | while (1) | |
8303 | { | |
8304 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
8305 | if (abbrev == NULL) | |
8306 | return info_ptr + bytes_read; | |
8307 | else | |
dee91e82 | 8308 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8309 | } |
8310 | } | |
8311 | ||
93311388 DE |
8312 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8313 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8314 | abbrev corresponding to that skipped uleb128 should be passed in |
8315 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8316 | children. */ | |
8317 | ||
d521ce57 TT |
8318 | static const gdb_byte * |
8319 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8320 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8321 | { |
8322 | unsigned int bytes_read; | |
8323 | struct attribute attr; | |
dee91e82 DE |
8324 | bfd *abfd = reader->abfd; |
8325 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8326 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8327 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8328 | unsigned int form, i; |
8329 | ||
8330 | for (i = 0; i < abbrev->num_attrs; i++) | |
8331 | { | |
8332 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8333 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8334 | { | |
dee91e82 | 8335 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 8336 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
8337 | complaint (&symfile_complaints, |
8338 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 8339 | else |
b9502d3f | 8340 | { |
9c541725 PA |
8341 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8342 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8343 | |
8344 | if (sibling_ptr < info_ptr) | |
8345 | complaint (&symfile_complaints, | |
8346 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
8347 | else if (sibling_ptr > reader->buffer_end) |
8348 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
8349 | else |
8350 | return sibling_ptr; | |
8351 | } | |
4bb7a0a7 DJ |
8352 | } |
8353 | ||
8354 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8355 | form = abbrev->attrs[i].form; | |
8356 | skip_attribute: | |
8357 | switch (form) | |
8358 | { | |
4bb7a0a7 | 8359 | case DW_FORM_ref_addr: |
ae411497 TT |
8360 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8361 | and later it is offset sized. */ | |
8362 | if (cu->header.version == 2) | |
8363 | info_ptr += cu->header.addr_size; | |
8364 | else | |
8365 | info_ptr += cu->header.offset_size; | |
8366 | break; | |
36586728 TT |
8367 | case DW_FORM_GNU_ref_alt: |
8368 | info_ptr += cu->header.offset_size; | |
8369 | break; | |
ae411497 | 8370 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8371 | info_ptr += cu->header.addr_size; |
8372 | break; | |
8373 | case DW_FORM_data1: | |
8374 | case DW_FORM_ref1: | |
8375 | case DW_FORM_flag: | |
8376 | info_ptr += 1; | |
8377 | break; | |
2dc7f7b3 | 8378 | case DW_FORM_flag_present: |
43988095 | 8379 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8380 | break; |
4bb7a0a7 DJ |
8381 | case DW_FORM_data2: |
8382 | case DW_FORM_ref2: | |
8383 | info_ptr += 2; | |
8384 | break; | |
8385 | case DW_FORM_data4: | |
8386 | case DW_FORM_ref4: | |
8387 | info_ptr += 4; | |
8388 | break; | |
8389 | case DW_FORM_data8: | |
8390 | case DW_FORM_ref8: | |
55f1336d | 8391 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8392 | info_ptr += 8; |
8393 | break; | |
0224619f JK |
8394 | case DW_FORM_data16: |
8395 | info_ptr += 16; | |
8396 | break; | |
4bb7a0a7 | 8397 | case DW_FORM_string: |
9b1c24c8 | 8398 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8399 | info_ptr += bytes_read; |
8400 | break; | |
2dc7f7b3 | 8401 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8402 | case DW_FORM_strp: |
36586728 | 8403 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8404 | info_ptr += cu->header.offset_size; |
8405 | break; | |
2dc7f7b3 | 8406 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8407 | case DW_FORM_block: |
8408 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8409 | info_ptr += bytes_read; | |
8410 | break; | |
8411 | case DW_FORM_block1: | |
8412 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8413 | break; | |
8414 | case DW_FORM_block2: | |
8415 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8416 | break; | |
8417 | case DW_FORM_block4: | |
8418 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8419 | break; | |
8420 | case DW_FORM_sdata: | |
8421 | case DW_FORM_udata: | |
8422 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8423 | case DW_FORM_GNU_addr_index: |
8424 | case DW_FORM_GNU_str_index: | |
d521ce57 | 8425 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8426 | break; |
8427 | case DW_FORM_indirect: | |
8428 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8429 | info_ptr += bytes_read; | |
8430 | /* We need to continue parsing from here, so just go back to | |
8431 | the top. */ | |
8432 | goto skip_attribute; | |
8433 | ||
8434 | default: | |
3e43a32a MS |
8435 | error (_("Dwarf Error: Cannot handle %s " |
8436 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8437 | dwarf_form_name (form), |
8438 | bfd_get_filename (abfd)); | |
8439 | } | |
8440 | } | |
8441 | ||
8442 | if (abbrev->has_children) | |
dee91e82 | 8443 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8444 | else |
8445 | return info_ptr; | |
8446 | } | |
8447 | ||
93311388 | 8448 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8449 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8450 | |
d521ce57 | 8451 | static const gdb_byte * |
dee91e82 DE |
8452 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8453 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8454 | const gdb_byte *info_ptr) |
91c24f0a DC |
8455 | { |
8456 | /* Do we know the sibling already? */ | |
72bf9492 | 8457 | |
91c24f0a DC |
8458 | if (orig_pdi->sibling) |
8459 | return orig_pdi->sibling; | |
8460 | ||
8461 | /* Are there any children to deal with? */ | |
8462 | ||
8463 | if (!orig_pdi->has_children) | |
8464 | return info_ptr; | |
8465 | ||
4bb7a0a7 | 8466 | /* Skip the children the long way. */ |
91c24f0a | 8467 | |
dee91e82 | 8468 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8469 | } |
8470 | ||
257e7a09 | 8471 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8472 | not NULL. */ |
c906108c SS |
8473 | |
8474 | static void | |
257e7a09 YQ |
8475 | dwarf2_read_symtab (struct partial_symtab *self, |
8476 | struct objfile *objfile) | |
c906108c | 8477 | { |
257e7a09 | 8478 | if (self->readin) |
c906108c | 8479 | { |
442e4d9c | 8480 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 8481 | self->filename); |
442e4d9c YQ |
8482 | } |
8483 | else | |
8484 | { | |
8485 | if (info_verbose) | |
c906108c | 8486 | { |
442e4d9c | 8487 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 8488 | self->filename); |
442e4d9c | 8489 | gdb_flush (gdb_stdout); |
c906108c | 8490 | } |
c906108c | 8491 | |
442e4d9c | 8492 | /* Restore our global data. */ |
9a3c8263 SM |
8493 | dwarf2_per_objfile |
8494 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
8495 | dwarf2_objfile_data_key); | |
10b3939b | 8496 | |
442e4d9c YQ |
8497 | /* If this psymtab is constructed from a debug-only objfile, the |
8498 | has_section_at_zero flag will not necessarily be correct. We | |
8499 | can get the correct value for this flag by looking at the data | |
8500 | associated with the (presumably stripped) associated objfile. */ | |
8501 | if (objfile->separate_debug_objfile_backlink) | |
8502 | { | |
8503 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
8504 | = ((struct dwarf2_per_objfile *) |
8505 | objfile_data (objfile->separate_debug_objfile_backlink, | |
8506 | dwarf2_objfile_data_key)); | |
9a619af0 | 8507 | |
442e4d9c YQ |
8508 | dwarf2_per_objfile->has_section_at_zero |
8509 | = dpo_backlink->has_section_at_zero; | |
8510 | } | |
b2ab525c | 8511 | |
442e4d9c | 8512 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 8513 | |
257e7a09 | 8514 | psymtab_to_symtab_1 (self); |
c906108c | 8515 | |
442e4d9c YQ |
8516 | /* Finish up the debug error message. */ |
8517 | if (info_verbose) | |
8518 | printf_filtered (_("done.\n")); | |
c906108c | 8519 | } |
95554aad TT |
8520 | |
8521 | process_cu_includes (); | |
c906108c | 8522 | } |
9cdd5dbd DE |
8523 | \f |
8524 | /* Reading in full CUs. */ | |
c906108c | 8525 | |
10b3939b DJ |
8526 | /* Add PER_CU to the queue. */ |
8527 | ||
8528 | static void | |
95554aad TT |
8529 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8530 | enum language pretend_language) | |
10b3939b DJ |
8531 | { |
8532 | struct dwarf2_queue_item *item; | |
8533 | ||
8534 | per_cu->queued = 1; | |
8d749320 | 8535 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 8536 | item->per_cu = per_cu; |
95554aad | 8537 | item->pretend_language = pretend_language; |
10b3939b DJ |
8538 | item->next = NULL; |
8539 | ||
8540 | if (dwarf2_queue == NULL) | |
8541 | dwarf2_queue = item; | |
8542 | else | |
8543 | dwarf2_queue_tail->next = item; | |
8544 | ||
8545 | dwarf2_queue_tail = item; | |
8546 | } | |
8547 | ||
89e63ee4 DE |
8548 | /* If PER_CU is not yet queued, add it to the queue. |
8549 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8550 | dependency. | |
0907af0c | 8551 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8552 | meaning either PER_CU is already queued or it is already loaded. |
8553 | ||
8554 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8555 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8556 | |
8557 | static int | |
89e63ee4 | 8558 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8559 | struct dwarf2_per_cu_data *per_cu, |
8560 | enum language pretend_language) | |
8561 | { | |
8562 | /* We may arrive here during partial symbol reading, if we need full | |
8563 | DIEs to process an unusual case (e.g. template arguments). Do | |
8564 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
8565 | if (dwarf2_per_objfile->reading_partial_symbols) | |
8566 | { | |
8567 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8568 | return 1; | |
8569 | return 0; | |
8570 | } | |
8571 | ||
8572 | /* Mark the dependence relation so that we don't flush PER_CU | |
8573 | too early. */ | |
89e63ee4 DE |
8574 | if (dependent_cu != NULL) |
8575 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8576 | |
8577 | /* If it's already on the queue, we have nothing to do. */ | |
8578 | if (per_cu->queued) | |
8579 | return 0; | |
8580 | ||
8581 | /* If the compilation unit is already loaded, just mark it as | |
8582 | used. */ | |
8583 | if (per_cu->cu != NULL) | |
8584 | { | |
8585 | per_cu->cu->last_used = 0; | |
8586 | return 0; | |
8587 | } | |
8588 | ||
8589 | /* Add it to the queue. */ | |
8590 | queue_comp_unit (per_cu, pretend_language); | |
8591 | ||
8592 | return 1; | |
8593 | } | |
8594 | ||
10b3939b DJ |
8595 | /* Process the queue. */ |
8596 | ||
8597 | static void | |
a0f42c21 | 8598 | process_queue (void) |
10b3939b DJ |
8599 | { |
8600 | struct dwarf2_queue_item *item, *next_item; | |
8601 | ||
b4f54984 | 8602 | if (dwarf_read_debug) |
45cfd468 DE |
8603 | { |
8604 | fprintf_unfiltered (gdb_stdlog, | |
8605 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8606 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8607 | } |
8608 | ||
03dd20cc DJ |
8609 | /* The queue starts out with one item, but following a DIE reference |
8610 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
8611 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
8612 | { | |
cc12ce38 DE |
8613 | if ((dwarf2_per_objfile->using_index |
8614 | ? !item->per_cu->v.quick->compunit_symtab | |
8615 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
8616 | /* Skip dummy CUs. */ | |
8617 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
8618 | { |
8619 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 8620 | unsigned int debug_print_threshold; |
247f5c4f | 8621 | char buf[100]; |
f4dc4d17 | 8622 | |
247f5c4f | 8623 | if (per_cu->is_debug_types) |
f4dc4d17 | 8624 | { |
247f5c4f DE |
8625 | struct signatured_type *sig_type = |
8626 | (struct signatured_type *) per_cu; | |
8627 | ||
8628 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 8629 | hex_string (sig_type->signature), |
9c541725 | 8630 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
8631 | /* There can be 100s of TUs. |
8632 | Only print them in verbose mode. */ | |
8633 | debug_print_threshold = 2; | |
f4dc4d17 | 8634 | } |
247f5c4f | 8635 | else |
73be47f5 | 8636 | { |
9c541725 PA |
8637 | sprintf (buf, "CU at offset 0x%x", |
8638 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
8639 | debug_print_threshold = 1; |
8640 | } | |
247f5c4f | 8641 | |
b4f54984 | 8642 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8643 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8644 | |
8645 | if (per_cu->is_debug_types) | |
8646 | process_full_type_unit (per_cu, item->pretend_language); | |
8647 | else | |
8648 | process_full_comp_unit (per_cu, item->pretend_language); | |
8649 | ||
b4f54984 | 8650 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8651 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8652 | } |
10b3939b DJ |
8653 | |
8654 | item->per_cu->queued = 0; | |
8655 | next_item = item->next; | |
8656 | xfree (item); | |
8657 | } | |
8658 | ||
8659 | dwarf2_queue_tail = NULL; | |
45cfd468 | 8660 | |
b4f54984 | 8661 | if (dwarf_read_debug) |
45cfd468 DE |
8662 | { |
8663 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8664 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8665 | } |
10b3939b DJ |
8666 | } |
8667 | ||
8668 | /* Free all allocated queue entries. This function only releases anything if | |
8669 | an error was thrown; if the queue was processed then it would have been | |
8670 | freed as we went along. */ | |
8671 | ||
8672 | static void | |
8673 | dwarf2_release_queue (void *dummy) | |
8674 | { | |
8675 | struct dwarf2_queue_item *item, *last; | |
8676 | ||
8677 | item = dwarf2_queue; | |
8678 | while (item) | |
8679 | { | |
8680 | /* Anything still marked queued is likely to be in an | |
8681 | inconsistent state, so discard it. */ | |
8682 | if (item->per_cu->queued) | |
8683 | { | |
8684 | if (item->per_cu->cu != NULL) | |
dee91e82 | 8685 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
8686 | item->per_cu->queued = 0; |
8687 | } | |
8688 | ||
8689 | last = item; | |
8690 | item = item->next; | |
8691 | xfree (last); | |
8692 | } | |
8693 | ||
8694 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
8695 | } | |
8696 | ||
8697 | /* Read in full symbols for PST, and anything it depends on. */ | |
8698 | ||
c906108c | 8699 | static void |
fba45db2 | 8700 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 8701 | { |
10b3939b | 8702 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
8703 | int i; |
8704 | ||
95554aad TT |
8705 | if (pst->readin) |
8706 | return; | |
8707 | ||
aaa75496 | 8708 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
8709 | if (!pst->dependencies[i]->readin |
8710 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
8711 | { |
8712 | /* Inform about additional files that need to be read in. */ | |
8713 | if (info_verbose) | |
8714 | { | |
a3f17187 | 8715 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
8716 | fputs_filtered (" ", gdb_stdout); |
8717 | wrap_here (""); | |
8718 | fputs_filtered ("and ", gdb_stdout); | |
8719 | wrap_here (""); | |
8720 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 8721 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
8722 | gdb_flush (gdb_stdout); |
8723 | } | |
8724 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
8725 | } | |
8726 | ||
9a3c8263 | 8727 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
8728 | |
8729 | if (per_cu == NULL) | |
aaa75496 JB |
8730 | { |
8731 | /* It's an include file, no symbols to read for it. | |
8732 | Everything is in the parent symtab. */ | |
8733 | pst->readin = 1; | |
8734 | return; | |
8735 | } | |
c906108c | 8736 | |
a0f42c21 | 8737 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
8738 | } |
8739 | ||
dee91e82 DE |
8740 | /* Trivial hash function for die_info: the hash value of a DIE |
8741 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8742 | |
dee91e82 DE |
8743 | static hashval_t |
8744 | die_hash (const void *item) | |
10b3939b | 8745 | { |
9a3c8263 | 8746 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8747 | |
9c541725 | 8748 | return to_underlying (die->sect_off); |
dee91e82 | 8749 | } |
63d06c5c | 8750 | |
dee91e82 DE |
8751 | /* Trivial comparison function for die_info structures: two DIEs |
8752 | are equal if they have the same offset. */ | |
98bfdba5 | 8753 | |
dee91e82 DE |
8754 | static int |
8755 | die_eq (const void *item_lhs, const void *item_rhs) | |
8756 | { | |
9a3c8263 SM |
8757 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8758 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8759 | |
9c541725 | 8760 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8761 | } |
c906108c | 8762 | |
dee91e82 DE |
8763 | /* die_reader_func for load_full_comp_unit. |
8764 | This is identical to read_signatured_type_reader, | |
8765 | but is kept separate for now. */ | |
c906108c | 8766 | |
dee91e82 DE |
8767 | static void |
8768 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8769 | const gdb_byte *info_ptr, |
dee91e82 DE |
8770 | struct die_info *comp_unit_die, |
8771 | int has_children, | |
8772 | void *data) | |
8773 | { | |
8774 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 8775 | enum language *language_ptr = (enum language *) data; |
6caca83c | 8776 | |
dee91e82 DE |
8777 | gdb_assert (cu->die_hash == NULL); |
8778 | cu->die_hash = | |
8779 | htab_create_alloc_ex (cu->header.length / 12, | |
8780 | die_hash, | |
8781 | die_eq, | |
8782 | NULL, | |
8783 | &cu->comp_unit_obstack, | |
8784 | hashtab_obstack_allocate, | |
8785 | dummy_obstack_deallocate); | |
e142c38c | 8786 | |
dee91e82 DE |
8787 | if (has_children) |
8788 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
8789 | &info_ptr, comp_unit_die); | |
8790 | cu->dies = comp_unit_die; | |
8791 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
8792 | |
8793 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8794 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8795 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8796 | or we won't be able to build types correctly. |
8797 | Similarly, if we do not read the producer, we can not apply | |
8798 | producer-specific interpretation. */ | |
95554aad | 8799 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 8800 | } |
10b3939b | 8801 | |
dee91e82 | 8802 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 8803 | |
dee91e82 | 8804 | static void |
95554aad TT |
8805 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8806 | enum language pretend_language) | |
dee91e82 | 8807 | { |
3019eac3 | 8808 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 8809 | |
f4dc4d17 DE |
8810 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8811 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
8812 | } |
8813 | ||
3da10d80 KS |
8814 | /* Add a DIE to the delayed physname list. */ |
8815 | ||
8816 | static void | |
8817 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8818 | const char *name, struct die_info *die, | |
8819 | struct dwarf2_cu *cu) | |
8820 | { | |
8821 | struct delayed_method_info mi; | |
8822 | mi.type = type; | |
8823 | mi.fnfield_index = fnfield_index; | |
8824 | mi.index = index; | |
8825 | mi.name = name; | |
8826 | mi.die = die; | |
8827 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8828 | } | |
8829 | ||
8830 | /* A cleanup for freeing the delayed method list. */ | |
8831 | ||
8832 | static void | |
8833 | free_delayed_list (void *ptr) | |
8834 | { | |
8835 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8836 | if (cu->method_list != NULL) | |
8837 | { | |
8838 | VEC_free (delayed_method_info, cu->method_list); | |
8839 | cu->method_list = NULL; | |
8840 | } | |
8841 | } | |
8842 | ||
3693fdb3 PA |
8843 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8844 | "const" / "volatile". If so, decrements LEN by the length of the | |
8845 | modifier and return true. Otherwise return false. */ | |
8846 | ||
8847 | template<size_t N> | |
8848 | static bool | |
8849 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8850 | { | |
8851 | size_t mod_len = sizeof (mod) - 1; | |
8852 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8853 | { | |
8854 | len -= mod_len; | |
8855 | return true; | |
8856 | } | |
8857 | return false; | |
8858 | } | |
8859 | ||
3da10d80 KS |
8860 | /* Compute the physnames of any methods on the CU's method list. |
8861 | ||
8862 | The computation of method physnames is delayed in order to avoid the | |
8863 | (bad) condition that one of the method's formal parameters is of an as yet | |
8864 | incomplete type. */ | |
8865 | ||
8866 | static void | |
8867 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8868 | { | |
8869 | int i; | |
8870 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8871 | |
8872 | /* Only C++ delays computing physnames. */ | |
8873 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8874 | return; | |
8875 | gdb_assert (cu->language == language_cplus); | |
8876 | ||
3da10d80 KS |
8877 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8878 | { | |
1d06ead6 | 8879 | const char *physname; |
3da10d80 KS |
8880 | struct fn_fieldlist *fn_flp |
8881 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8882 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8883 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8884 | = physname ? physname : ""; | |
3693fdb3 PA |
8885 | |
8886 | /* Since there's no tag to indicate whether a method is a | |
8887 | const/volatile overload, extract that information out of the | |
8888 | demangled name. */ | |
8889 | if (physname != NULL) | |
8890 | { | |
8891 | size_t len = strlen (physname); | |
8892 | ||
8893 | while (1) | |
8894 | { | |
8895 | if (physname[len] == ')') /* shortcut */ | |
8896 | break; | |
8897 | else if (check_modifier (physname, len, " const")) | |
8898 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8899 | else if (check_modifier (physname, len, " volatile")) | |
8900 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8901 | else | |
8902 | break; | |
8903 | } | |
8904 | } | |
3da10d80 KS |
8905 | } |
8906 | } | |
8907 | ||
a766d390 DE |
8908 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8909 | and it's not clear if/how imported objects will appear. | |
8910 | To keep Go support simple until that's worked out, | |
8911 | go back through what we've read and create something usable. | |
8912 | We could do this while processing each DIE, and feels kinda cleaner, | |
8913 | but that way is more invasive. | |
8914 | This is to, for example, allow the user to type "p var" or "b main" | |
8915 | without having to specify the package name, and allow lookups | |
8916 | of module.object to work in contexts that use the expression | |
8917 | parser. */ | |
8918 | ||
8919 | static void | |
8920 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8921 | { | |
8922 | char *package_name = NULL; | |
8923 | struct pending *list; | |
8924 | int i; | |
8925 | ||
8926 | for (list = global_symbols; list != NULL; list = list->next) | |
8927 | { | |
8928 | for (i = 0; i < list->nsyms; ++i) | |
8929 | { | |
8930 | struct symbol *sym = list->symbol[i]; | |
8931 | ||
8932 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8933 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8934 | { | |
8935 | char *this_package_name = go_symbol_package_name (sym); | |
8936 | ||
8937 | if (this_package_name == NULL) | |
8938 | continue; | |
8939 | if (package_name == NULL) | |
8940 | package_name = this_package_name; | |
8941 | else | |
8942 | { | |
8943 | if (strcmp (package_name, this_package_name) != 0) | |
8944 | complaint (&symfile_complaints, | |
8945 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8946 | (symbol_symtab (sym) != NULL |
8947 | ? symtab_to_filename_for_display | |
8948 | (symbol_symtab (sym)) | |
4262abfb | 8949 | : objfile_name (cu->objfile)), |
a766d390 DE |
8950 | this_package_name, package_name); |
8951 | xfree (this_package_name); | |
8952 | } | |
8953 | } | |
8954 | } | |
8955 | } | |
8956 | ||
8957 | if (package_name != NULL) | |
8958 | { | |
8959 | struct objfile *objfile = cu->objfile; | |
34a68019 | 8960 | const char *saved_package_name |
224c3ddb SM |
8961 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
8962 | package_name, | |
8963 | strlen (package_name)); | |
19f392bc UW |
8964 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8965 | saved_package_name); | |
a766d390 DE |
8966 | struct symbol *sym; |
8967 | ||
8968 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
8969 | ||
e623cf5d | 8970 | sym = allocate_symbol (objfile); |
f85f34ed | 8971 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
8972 | SYMBOL_SET_NAMES (sym, saved_package_name, |
8973 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
8974 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8975 | e.g., "main" finds the "main" module and not C's main(). */ | |
8976 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8977 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8978 | SYMBOL_TYPE (sym) = type; |
8979 | ||
8980 | add_symbol_to_list (sym, &global_symbols); | |
8981 | ||
8982 | xfree (package_name); | |
8983 | } | |
8984 | } | |
8985 | ||
95554aad TT |
8986 | /* Return the symtab for PER_CU. This works properly regardless of |
8987 | whether we're using the index or psymtabs. */ | |
8988 | ||
43f3e411 DE |
8989 | static struct compunit_symtab * |
8990 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
8991 | { |
8992 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
8993 | ? per_cu->v.quick->compunit_symtab |
8994 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
8995 | } |
8996 | ||
8997 | /* A helper function for computing the list of all symbol tables | |
8998 | included by PER_CU. */ | |
8999 | ||
9000 | static void | |
43f3e411 | 9001 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 9002 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 9003 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 9004 | struct compunit_symtab *immediate_parent) |
95554aad TT |
9005 | { |
9006 | void **slot; | |
9007 | int ix; | |
43f3e411 | 9008 | struct compunit_symtab *cust; |
95554aad TT |
9009 | struct dwarf2_per_cu_data *iter; |
9010 | ||
9011 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
9012 | if (*slot != NULL) | |
9013 | { | |
9014 | /* This inclusion and its children have been processed. */ | |
9015 | return; | |
9016 | } | |
9017 | ||
9018 | *slot = per_cu; | |
9019 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
9020 | cust = get_compunit_symtab (per_cu); |
9021 | if (cust != NULL) | |
ec94af83 DE |
9022 | { |
9023 | /* If this is a type unit only add its symbol table if we haven't | |
9024 | seen it yet (type unit per_cu's can share symtabs). */ | |
9025 | if (per_cu->is_debug_types) | |
9026 | { | |
43f3e411 | 9027 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9028 | if (*slot == NULL) |
9029 | { | |
43f3e411 DE |
9030 | *slot = cust; |
9031 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
9032 | if (cust->user == NULL) | |
9033 | cust->user = immediate_parent; | |
ec94af83 DE |
9034 | } |
9035 | } | |
9036 | else | |
f9125b6c | 9037 | { |
43f3e411 DE |
9038 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
9039 | if (cust->user == NULL) | |
9040 | cust->user = immediate_parent; | |
f9125b6c | 9041 | } |
ec94af83 | 9042 | } |
95554aad TT |
9043 | |
9044 | for (ix = 0; | |
796a7ff8 | 9045 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 9046 | ++ix) |
ec94af83 DE |
9047 | { |
9048 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 9049 | all_type_symtabs, iter, cust); |
ec94af83 | 9050 | } |
95554aad TT |
9051 | } |
9052 | ||
43f3e411 | 9053 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9054 | PER_CU. */ |
9055 | ||
9056 | static void | |
43f3e411 | 9057 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 9058 | { |
f4dc4d17 DE |
9059 | gdb_assert (! per_cu->is_debug_types); |
9060 | ||
796a7ff8 | 9061 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
9062 | { |
9063 | int ix, len; | |
ec94af83 | 9064 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
9065 | struct compunit_symtab *compunit_symtab_iter; |
9066 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 9067 | htab_t all_children, all_type_symtabs; |
43f3e411 | 9068 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
9069 | |
9070 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9071 | if (cust == NULL) |
95554aad TT |
9072 | return; |
9073 | ||
9074 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
9075 | NULL, xcalloc, xfree); | |
ec94af83 DE |
9076 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
9077 | NULL, xcalloc, xfree); | |
95554aad TT |
9078 | |
9079 | for (ix = 0; | |
796a7ff8 | 9080 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 9081 | ix, per_cu_iter); |
95554aad | 9082 | ++ix) |
ec94af83 DE |
9083 | { |
9084 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 9085 | all_type_symtabs, per_cu_iter, |
43f3e411 | 9086 | cust); |
ec94af83 | 9087 | } |
95554aad | 9088 | |
ec94af83 | 9089 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
9090 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
9091 | cust->includes | |
8d749320 SM |
9092 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
9093 | struct compunit_symtab *, len + 1); | |
95554aad | 9094 | for (ix = 0; |
43f3e411 DE |
9095 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
9096 | compunit_symtab_iter); | |
95554aad | 9097 | ++ix) |
43f3e411 DE |
9098 | cust->includes[ix] = compunit_symtab_iter; |
9099 | cust->includes[len] = NULL; | |
95554aad | 9100 | |
43f3e411 | 9101 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 9102 | htab_delete (all_children); |
ec94af83 | 9103 | htab_delete (all_type_symtabs); |
95554aad TT |
9104 | } |
9105 | } | |
9106 | ||
9107 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9108 | read. */ | |
9109 | ||
9110 | static void | |
9111 | process_cu_includes (void) | |
9112 | { | |
9113 | int ix; | |
9114 | struct dwarf2_per_cu_data *iter; | |
9115 | ||
9116 | for (ix = 0; | |
9117 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
9118 | ix, iter); | |
9119 | ++ix) | |
f4dc4d17 DE |
9120 | { |
9121 | if (! iter->is_debug_types) | |
43f3e411 | 9122 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 9123 | } |
95554aad TT |
9124 | |
9125 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
9126 | } | |
9127 | ||
9cdd5dbd | 9128 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
9129 | already been loaded into memory. */ |
9130 | ||
9131 | static void | |
95554aad TT |
9132 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9133 | enum language pretend_language) | |
10b3939b | 9134 | { |
10b3939b | 9135 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 9136 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 9137 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 9138 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9139 | struct compunit_symtab *cust; |
33c7c59d | 9140 | struct cleanup *delayed_list_cleanup; |
10b3939b | 9141 | CORE_ADDR baseaddr; |
4359dff1 | 9142 | struct block *static_block; |
3e29f34a | 9143 | CORE_ADDR addr; |
10b3939b DJ |
9144 | |
9145 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
9146 | ||
10b3939b | 9147 | buildsym_init (); |
33c7c59d | 9148 | scoped_free_pendings free_pending; |
3da10d80 | 9149 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
9150 | |
9151 | cu->list_in_scope = &file_symbols; | |
c906108c | 9152 | |
95554aad TT |
9153 | cu->language = pretend_language; |
9154 | cu->language_defn = language_def (cu->language); | |
9155 | ||
c906108c | 9156 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9157 | process_die (cu->dies, cu); |
c906108c | 9158 | |
a766d390 DE |
9159 | /* For now fudge the Go package. */ |
9160 | if (cu->language == language_go) | |
9161 | fixup_go_packaging (cu); | |
9162 | ||
3da10d80 KS |
9163 | /* Now that we have processed all the DIEs in the CU, all the types |
9164 | should be complete, and it should now be safe to compute all of the | |
9165 | physnames. */ | |
9166 | compute_delayed_physnames (cu); | |
9167 | do_cleanups (delayed_list_cleanup); | |
9168 | ||
fae299cd DC |
9169 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9170 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9171 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9172 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9173 | |
3e29f34a MR |
9174 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
9175 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
9176 | |
9177 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9178 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9179 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9180 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9181 | this comp unit. */ | |
9182 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9183 | ||
43f3e411 DE |
9184 | cust = end_symtab_from_static_block (static_block, |
9185 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 9186 | |
43f3e411 | 9187 | if (cust != NULL) |
c906108c | 9188 | { |
df15bd07 | 9189 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9190 | |
8be455d7 JK |
9191 | /* Set symtab language to language from DW_AT_language. If the |
9192 | compilation is from a C file generated by language preprocessors, do | |
9193 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9194 | if (!(cu->language == language_c |
40e3ad0e | 9195 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9196 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9197 | |
9198 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9199 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9200 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9201 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9202 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9203 | |
9204 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9205 | needed, it would be wrong due to missing DW_AT_producer there. | |
9206 | ||
9207 | Still one can confuse GDB by using non-standard GCC compilation | |
9208 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
9209 | */ | |
ab260dad | 9210 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9211 | cust->locations_valid = 1; |
e0d00bc7 JK |
9212 | |
9213 | if (gcc_4_minor >= 5) | |
43f3e411 | 9214 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9215 | |
43f3e411 | 9216 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9217 | } |
9291a0cd TT |
9218 | |
9219 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9220 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
9221 | else |
9222 | { | |
9223 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9224 | pst->compunit_symtab = cust; |
9291a0cd TT |
9225 | pst->readin = 1; |
9226 | } | |
c906108c | 9227 | |
95554aad TT |
9228 | /* Push it for inclusion processing later. */ |
9229 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
f4dc4d17 | 9230 | } |
45cfd468 | 9231 | |
f4dc4d17 DE |
9232 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9233 | already been loaded into memory. */ | |
9234 | ||
9235 | static void | |
9236 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9237 | enum language pretend_language) | |
9238 | { | |
9239 | struct dwarf2_cu *cu = per_cu->cu; | |
9240 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 9241 | struct compunit_symtab *cust; |
33c7c59d | 9242 | struct cleanup *delayed_list_cleanup; |
0186c6a7 DE |
9243 | struct signatured_type *sig_type; |
9244 | ||
9245 | gdb_assert (per_cu->is_debug_types); | |
9246 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
9247 | |
9248 | buildsym_init (); | |
33c7c59d | 9249 | scoped_free_pendings free_pending; |
f4dc4d17 DE |
9250 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
9251 | ||
9252 | cu->list_in_scope = &file_symbols; | |
9253 | ||
9254 | cu->language = pretend_language; | |
9255 | cu->language_defn = language_def (cu->language); | |
9256 | ||
9257 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9258 | process_die (cu->dies, cu); | |
9259 | ||
9260 | /* For now fudge the Go package. */ | |
9261 | if (cu->language == language_go) | |
9262 | fixup_go_packaging (cu); | |
9263 | ||
9264 | /* Now that we have processed all the DIEs in the CU, all the types | |
9265 | should be complete, and it should now be safe to compute all of the | |
9266 | physnames. */ | |
9267 | compute_delayed_physnames (cu); | |
9268 | do_cleanups (delayed_list_cleanup); | |
9269 | ||
9270 | /* TUs share symbol tables. | |
9271 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9272 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9273 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9274 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9275 | { |
43f3e411 DE |
9276 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
9277 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 9278 | |
43f3e411 | 9279 | if (cust != NULL) |
f4dc4d17 DE |
9280 | { |
9281 | /* Set symtab language to language from DW_AT_language. If the | |
9282 | compilation is from a C file generated by language preprocessors, | |
9283 | do not set the language if it was already deduced by | |
9284 | start_subfile. */ | |
43f3e411 DE |
9285 | if (!(cu->language == language_c |
9286 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9287 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9288 | } |
9289 | } | |
9290 | else | |
9291 | { | |
0ab9ce85 | 9292 | augment_type_symtab (); |
43f3e411 | 9293 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9294 | } |
9295 | ||
9296 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9297 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9298 | else |
9299 | { | |
9300 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9301 | pst->compunit_symtab = cust; |
f4dc4d17 | 9302 | pst->readin = 1; |
45cfd468 | 9303 | } |
c906108c SS |
9304 | } |
9305 | ||
95554aad TT |
9306 | /* Process an imported unit DIE. */ |
9307 | ||
9308 | static void | |
9309 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9310 | { | |
9311 | struct attribute *attr; | |
9312 | ||
f4dc4d17 DE |
9313 | /* For now we don't handle imported units in type units. */ |
9314 | if (cu->per_cu->is_debug_types) | |
9315 | { | |
9316 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9317 | " supported in type units [in module %s]"), | |
4262abfb | 9318 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
9319 | } |
9320 | ||
95554aad TT |
9321 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9322 | if (attr != NULL) | |
9323 | { | |
9c541725 PA |
9324 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9325 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9326 | dwarf2_per_cu_data *per_cu | |
9327 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 9328 | |
69d751e3 | 9329 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
9330 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
9331 | load_full_comp_unit (per_cu, cu->language); | |
9332 | ||
796a7ff8 | 9333 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
9334 | per_cu); |
9335 | } | |
9336 | } | |
9337 | ||
4c8aa72d PA |
9338 | /* RAII object that represents a process_die scope: i.e., |
9339 | starts/finishes processing a DIE. */ | |
9340 | class process_die_scope | |
adde2bff | 9341 | { |
4c8aa72d PA |
9342 | public: |
9343 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9344 | : m_die (die), m_cu (cu) | |
9345 | { | |
9346 | /* We should only be processing DIEs not already in process. */ | |
9347 | gdb_assert (!m_die->in_process); | |
9348 | m_die->in_process = true; | |
9349 | } | |
8c3cb9fa | 9350 | |
4c8aa72d PA |
9351 | ~process_die_scope () |
9352 | { | |
9353 | m_die->in_process = false; | |
9354 | ||
9355 | /* If we're done processing the DIE for the CU that owns the line | |
9356 | header, we don't need the line header anymore. */ | |
9357 | if (m_cu->line_header_die_owner == m_die) | |
9358 | { | |
9359 | delete m_cu->line_header; | |
9360 | m_cu->line_header = NULL; | |
9361 | m_cu->line_header_die_owner = NULL; | |
9362 | } | |
9363 | } | |
9364 | ||
9365 | private: | |
9366 | die_info *m_die; | |
9367 | dwarf2_cu *m_cu; | |
9368 | }; | |
adde2bff | 9369 | |
c906108c SS |
9370 | /* Process a die and its children. */ |
9371 | ||
9372 | static void | |
e7c27a73 | 9373 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9374 | { |
4c8aa72d | 9375 | process_die_scope scope (die, cu); |
adde2bff | 9376 | |
c906108c SS |
9377 | switch (die->tag) |
9378 | { | |
9379 | case DW_TAG_padding: | |
9380 | break; | |
9381 | case DW_TAG_compile_unit: | |
95554aad | 9382 | case DW_TAG_partial_unit: |
e7c27a73 | 9383 | read_file_scope (die, cu); |
c906108c | 9384 | break; |
348e048f DE |
9385 | case DW_TAG_type_unit: |
9386 | read_type_unit_scope (die, cu); | |
9387 | break; | |
c906108c | 9388 | case DW_TAG_subprogram: |
c906108c | 9389 | case DW_TAG_inlined_subroutine: |
edb3359d | 9390 | read_func_scope (die, cu); |
c906108c SS |
9391 | break; |
9392 | case DW_TAG_lexical_block: | |
14898363 L |
9393 | case DW_TAG_try_block: |
9394 | case DW_TAG_catch_block: | |
e7c27a73 | 9395 | read_lexical_block_scope (die, cu); |
c906108c | 9396 | break; |
216f72a1 | 9397 | case DW_TAG_call_site: |
96408a79 SA |
9398 | case DW_TAG_GNU_call_site: |
9399 | read_call_site_scope (die, cu); | |
9400 | break; | |
c906108c | 9401 | case DW_TAG_class_type: |
680b30c7 | 9402 | case DW_TAG_interface_type: |
c906108c SS |
9403 | case DW_TAG_structure_type: |
9404 | case DW_TAG_union_type: | |
134d01f1 | 9405 | process_structure_scope (die, cu); |
c906108c SS |
9406 | break; |
9407 | case DW_TAG_enumeration_type: | |
134d01f1 | 9408 | process_enumeration_scope (die, cu); |
c906108c | 9409 | break; |
134d01f1 | 9410 | |
f792889a DJ |
9411 | /* These dies have a type, but processing them does not create |
9412 | a symbol or recurse to process the children. Therefore we can | |
9413 | read them on-demand through read_type_die. */ | |
c906108c | 9414 | case DW_TAG_subroutine_type: |
72019c9c | 9415 | case DW_TAG_set_type: |
c906108c | 9416 | case DW_TAG_array_type: |
c906108c | 9417 | case DW_TAG_pointer_type: |
c906108c | 9418 | case DW_TAG_ptr_to_member_type: |
c906108c | 9419 | case DW_TAG_reference_type: |
4297a3f0 | 9420 | case DW_TAG_rvalue_reference_type: |
c906108c | 9421 | case DW_TAG_string_type: |
c906108c | 9422 | break; |
134d01f1 | 9423 | |
c906108c | 9424 | case DW_TAG_base_type: |
a02abb62 | 9425 | case DW_TAG_subrange_type: |
cb249c71 | 9426 | case DW_TAG_typedef: |
134d01f1 DJ |
9427 | /* Add a typedef symbol for the type definition, if it has a |
9428 | DW_AT_name. */ | |
f792889a | 9429 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9430 | break; |
c906108c | 9431 | case DW_TAG_common_block: |
e7c27a73 | 9432 | read_common_block (die, cu); |
c906108c SS |
9433 | break; |
9434 | case DW_TAG_common_inclusion: | |
9435 | break; | |
d9fa45fe | 9436 | case DW_TAG_namespace: |
4d4ec4e5 | 9437 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 9438 | read_namespace (die, cu); |
d9fa45fe | 9439 | break; |
5d7cb8df | 9440 | case DW_TAG_module: |
4d4ec4e5 | 9441 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
9442 | read_module (die, cu); |
9443 | break; | |
d9fa45fe | 9444 | case DW_TAG_imported_declaration: |
74921315 KS |
9445 | cu->processing_has_namespace_info = 1; |
9446 | if (read_namespace_alias (die, cu)) | |
9447 | break; | |
9448 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 9449 | case DW_TAG_imported_module: |
4d4ec4e5 | 9450 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
9451 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9452 | || cu->language != language_fortran)) | |
9453 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
9454 | dwarf_tag_name (die->tag)); | |
9455 | read_import_statement (die, cu); | |
d9fa45fe | 9456 | break; |
95554aad TT |
9457 | |
9458 | case DW_TAG_imported_unit: | |
9459 | process_imported_unit_die (die, cu); | |
9460 | break; | |
9461 | ||
71a3c369 TT |
9462 | case DW_TAG_variable: |
9463 | read_variable (die, cu); | |
9464 | break; | |
9465 | ||
c906108c | 9466 | default: |
e7c27a73 | 9467 | new_symbol (die, NULL, cu); |
c906108c SS |
9468 | break; |
9469 | } | |
9470 | } | |
ca69b9e6 DE |
9471 | \f |
9472 | /* DWARF name computation. */ | |
c906108c | 9473 | |
94af9270 KS |
9474 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9475 | needs to have the name of the scope prepended to the name listed in the | |
9476 | die. */ | |
9477 | ||
9478 | static int | |
9479 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9480 | { | |
1c809c68 TT |
9481 | struct attribute *attr; |
9482 | ||
94af9270 KS |
9483 | switch (die->tag) |
9484 | { | |
9485 | case DW_TAG_namespace: | |
9486 | case DW_TAG_typedef: | |
9487 | case DW_TAG_class_type: | |
9488 | case DW_TAG_interface_type: | |
9489 | case DW_TAG_structure_type: | |
9490 | case DW_TAG_union_type: | |
9491 | case DW_TAG_enumeration_type: | |
9492 | case DW_TAG_enumerator: | |
9493 | case DW_TAG_subprogram: | |
08a76f8a | 9494 | case DW_TAG_inlined_subroutine: |
94af9270 | 9495 | case DW_TAG_member: |
74921315 | 9496 | case DW_TAG_imported_declaration: |
94af9270 KS |
9497 | return 1; |
9498 | ||
9499 | case DW_TAG_variable: | |
c2b0a229 | 9500 | case DW_TAG_constant: |
94af9270 KS |
9501 | /* We only need to prefix "globally" visible variables. These include |
9502 | any variable marked with DW_AT_external or any variable that | |
9503 | lives in a namespace. [Variables in anonymous namespaces | |
9504 | require prefixing, but they are not DW_AT_external.] */ | |
9505 | ||
9506 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9507 | { | |
9508 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9509 | |
94af9270 KS |
9510 | return die_needs_namespace (die_specification (die, &spec_cu), |
9511 | spec_cu); | |
9512 | } | |
9513 | ||
1c809c68 | 9514 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9515 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9516 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9517 | return 0; |
9518 | /* A variable in a lexical block of some kind does not need a | |
9519 | namespace, even though in C++ such variables may be external | |
9520 | and have a mangled name. */ | |
9521 | if (die->parent->tag == DW_TAG_lexical_block | |
9522 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9523 | || die->parent->tag == DW_TAG_catch_block |
9524 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9525 | return 0; |
9526 | return 1; | |
94af9270 KS |
9527 | |
9528 | default: | |
9529 | return 0; | |
9530 | } | |
9531 | } | |
9532 | ||
73b9be8b KS |
9533 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9534 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9535 | defined for the given DIE. */ | |
9536 | ||
9537 | static struct attribute * | |
9538 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9539 | { | |
9540 | struct attribute *attr; | |
9541 | ||
9542 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9543 | if (attr == NULL) | |
9544 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9545 | ||
9546 | return attr; | |
9547 | } | |
9548 | ||
9549 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9550 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9551 | defined for the given DIE. */ | |
9552 | ||
9553 | static const char * | |
9554 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9555 | { | |
9556 | const char *linkage_name; | |
9557 | ||
9558 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9559 | if (linkage_name == NULL) | |
9560 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9561 | ||
9562 | return linkage_name; | |
9563 | } | |
9564 | ||
94af9270 | 9565 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9566 | compute the physname for the object, which include a method's: |
9c37b5ae | 9567 | - formal parameters (C++), |
a766d390 | 9568 | - receiver type (Go), |
a766d390 DE |
9569 | |
9570 | The term "physname" is a bit confusing. | |
9571 | For C++, for example, it is the demangled name. | |
9572 | For Go, for example, it's the mangled name. | |
94af9270 | 9573 | |
af6b7be1 JB |
9574 | For Ada, return the DIE's linkage name rather than the fully qualified |
9575 | name. PHYSNAME is ignored.. | |
9576 | ||
94af9270 KS |
9577 | The result is allocated on the objfile_obstack and canonicalized. */ |
9578 | ||
9579 | static const char * | |
15d034d0 TT |
9580 | dwarf2_compute_name (const char *name, |
9581 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9582 | int physname) |
9583 | { | |
bb5ed363 DE |
9584 | struct objfile *objfile = cu->objfile; |
9585 | ||
94af9270 KS |
9586 | if (name == NULL) |
9587 | name = dwarf2_name (die, cu); | |
9588 | ||
2ee7123e DE |
9589 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
9590 | but otherwise compute it by typename_concat inside GDB. | |
9591 | FIXME: Actually this is not really true, or at least not always true. | |
9592 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
9593 | Fortran names because there is no mangling standard. So new_symbol_full | |
9594 | will set the demangled name to the result of dwarf2_full_name, and it is | |
9595 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
9596 | if (cu->language == language_ada |
9597 | || (cu->language == language_fortran && physname)) | |
9598 | { | |
9599 | /* For Ada unit, we prefer the linkage name over the name, as | |
9600 | the former contains the exported name, which the user expects | |
9601 | to be able to reference. Ideally, we want the user to be able | |
9602 | to reference this entity using either natural or linkage name, | |
9603 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 9604 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 9605 | |
2ee7123e DE |
9606 | if (linkage_name != NULL) |
9607 | return linkage_name; | |
f55ee35c JK |
9608 | } |
9609 | ||
94af9270 KS |
9610 | /* These are the only languages we know how to qualify names in. */ |
9611 | if (name != NULL | |
9c37b5ae | 9612 | && (cu->language == language_cplus |
c44af4eb TT |
9613 | || cu->language == language_fortran || cu->language == language_d |
9614 | || cu->language == language_rust)) | |
94af9270 KS |
9615 | { |
9616 | if (die_needs_namespace (die, cu)) | |
9617 | { | |
9618 | long length; | |
0d5cff50 | 9619 | const char *prefix; |
34a68019 | 9620 | const char *canonical_name = NULL; |
94af9270 | 9621 | |
d7e74731 PA |
9622 | string_file buf; |
9623 | ||
94af9270 | 9624 | prefix = determine_prefix (die, cu); |
94af9270 KS |
9625 | if (*prefix != '\0') |
9626 | { | |
f55ee35c JK |
9627 | char *prefixed_name = typename_concat (NULL, prefix, name, |
9628 | physname, cu); | |
9a619af0 | 9629 | |
d7e74731 | 9630 | buf.puts (prefixed_name); |
94af9270 KS |
9631 | xfree (prefixed_name); |
9632 | } | |
9633 | else | |
d7e74731 | 9634 | buf.puts (name); |
94af9270 | 9635 | |
98bfdba5 PA |
9636 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
9637 | as children with DW_TAG_template_type_param or | |
9638 | DW_TAG_value_type_param. If the latter, add them to the name | |
9639 | here. If the name already has template parameters, then | |
9640 | skip this step; some versions of GCC emit both, and | |
9641 | it is more efficient to use the pre-computed name. | |
9642 | ||
9643 | Something to keep in mind about this process: it is very | |
9644 | unlikely, or in some cases downright impossible, to produce | |
9645 | something that will match the mangled name of a function. | |
9646 | If the definition of the function has the same debug info, | |
9647 | we should be able to match up with it anyway. But fallbacks | |
9648 | using the minimal symbol, for instance to find a method | |
9649 | implemented in a stripped copy of libstdc++, will not work. | |
9650 | If we do not have debug info for the definition, we will have to | |
9651 | match them up some other way. | |
9652 | ||
9653 | When we do name matching there is a related problem with function | |
9654 | templates; two instantiated function templates are allowed to | |
9655 | differ only by their return types, which we do not add here. */ | |
9656 | ||
9657 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
9658 | { | |
9659 | struct attribute *attr; | |
9660 | struct die_info *child; | |
9661 | int first = 1; | |
9662 | ||
9663 | die->building_fullname = 1; | |
9664 | ||
9665 | for (child = die->child; child != NULL; child = child->sibling) | |
9666 | { | |
9667 | struct type *type; | |
12df843f | 9668 | LONGEST value; |
d521ce57 | 9669 | const gdb_byte *bytes; |
98bfdba5 PA |
9670 | struct dwarf2_locexpr_baton *baton; |
9671 | struct value *v; | |
9672 | ||
9673 | if (child->tag != DW_TAG_template_type_param | |
9674 | && child->tag != DW_TAG_template_value_param) | |
9675 | continue; | |
9676 | ||
9677 | if (first) | |
9678 | { | |
d7e74731 | 9679 | buf.puts ("<"); |
98bfdba5 PA |
9680 | first = 0; |
9681 | } | |
9682 | else | |
d7e74731 | 9683 | buf.puts (", "); |
98bfdba5 PA |
9684 | |
9685 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
9686 | if (attr == NULL) | |
9687 | { | |
9688 | complaint (&symfile_complaints, | |
9689 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 9690 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
9691 | continue; |
9692 | } | |
9693 | type = die_type (child, cu); | |
9694 | ||
9695 | if (child->tag == DW_TAG_template_type_param) | |
9696 | { | |
d7e74731 | 9697 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
9698 | continue; |
9699 | } | |
9700 | ||
9701 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
9702 | if (attr == NULL) | |
9703 | { | |
9704 | complaint (&symfile_complaints, | |
3e43a32a MS |
9705 | _("template parameter missing " |
9706 | "DW_AT_const_value")); | |
d7e74731 | 9707 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
9708 | continue; |
9709 | } | |
9710 | ||
9711 | dwarf2_const_value_attr (attr, type, name, | |
9712 | &cu->comp_unit_obstack, cu, | |
9713 | &value, &bytes, &baton); | |
9714 | ||
9715 | if (TYPE_NOSIGN (type)) | |
9716 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
9717 | changed, this can use value_print instead. */ | |
d7e74731 | 9718 | c_printchar (value, type, &buf); |
98bfdba5 PA |
9719 | else |
9720 | { | |
9721 | struct value_print_options opts; | |
9722 | ||
9723 | if (baton != NULL) | |
9724 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
9725 | baton->data, | |
9726 | baton->size, | |
9727 | baton->per_cu); | |
9728 | else if (bytes != NULL) | |
9729 | { | |
9730 | v = allocate_value (type); | |
9731 | memcpy (value_contents_writeable (v), bytes, | |
9732 | TYPE_LENGTH (type)); | |
9733 | } | |
9734 | else | |
9735 | v = value_from_longest (type, value); | |
9736 | ||
3e43a32a MS |
9737 | /* Specify decimal so that we do not depend on |
9738 | the radix. */ | |
98bfdba5 PA |
9739 | get_formatted_print_options (&opts, 'd'); |
9740 | opts.raw = 1; | |
d7e74731 | 9741 | value_print (v, &buf, &opts); |
98bfdba5 PA |
9742 | release_value (v); |
9743 | value_free (v); | |
9744 | } | |
9745 | } | |
9746 | ||
9747 | die->building_fullname = 0; | |
9748 | ||
9749 | if (!first) | |
9750 | { | |
9751 | /* Close the argument list, with a space if necessary | |
9752 | (nested templates). */ | |
d7e74731 PA |
9753 | if (!buf.empty () && buf.string ().back () == '>') |
9754 | buf.puts (" >"); | |
98bfdba5 | 9755 | else |
d7e74731 | 9756 | buf.puts (">"); |
98bfdba5 PA |
9757 | } |
9758 | } | |
9759 | ||
9c37b5ae | 9760 | /* For C++ methods, append formal parameter type |
94af9270 | 9761 | information, if PHYSNAME. */ |
6e70227d | 9762 | |
94af9270 | 9763 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 9764 | && cu->language == language_cplus) |
94af9270 KS |
9765 | { |
9766 | struct type *type = read_type_die (die, cu); | |
9767 | ||
d7e74731 | 9768 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 9769 | &type_print_raw_options); |
94af9270 | 9770 | |
9c37b5ae | 9771 | if (cu->language == language_cplus) |
94af9270 | 9772 | { |
60430eff DJ |
9773 | /* Assume that an artificial first parameter is |
9774 | "this", but do not crash if it is not. RealView | |
9775 | marks unnamed (and thus unused) parameters as | |
9776 | artificial; there is no way to differentiate | |
9777 | the two cases. */ | |
94af9270 KS |
9778 | if (TYPE_NFIELDS (type) > 0 |
9779 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 9780 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
9781 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
9782 | 0)))) | |
d7e74731 | 9783 | buf.puts (" const"); |
94af9270 KS |
9784 | } |
9785 | } | |
9786 | ||
d7e74731 | 9787 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
9788 | |
9789 | if (cu->language == language_cplus) | |
34a68019 | 9790 | canonical_name |
322a8516 | 9791 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
9792 | &objfile->per_bfd->storage_obstack); |
9793 | ||
9794 | /* If we only computed INTERMEDIATE_NAME, or if | |
9795 | INTERMEDIATE_NAME is already canonical, then we need to | |
9796 | copy it to the appropriate obstack. */ | |
322a8516 | 9797 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
9798 | name = ((const char *) |
9799 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
9800 | intermediate_name.c_str (), |
9801 | intermediate_name.length ())); | |
34a68019 TT |
9802 | else |
9803 | name = canonical_name; | |
94af9270 KS |
9804 | } |
9805 | } | |
9806 | ||
9807 | return name; | |
9808 | } | |
9809 | ||
0114d602 DJ |
9810 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9811 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9812 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9813 | not have a name. NAME may either be from a previous call to |
9814 | dwarf2_name or NULL. | |
9815 | ||
9c37b5ae | 9816 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9817 | |
9818 | static const char * | |
15d034d0 | 9819 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 9820 | { |
94af9270 KS |
9821 | return dwarf2_compute_name (name, die, cu, 0); |
9822 | } | |
0114d602 | 9823 | |
94af9270 KS |
9824 | /* Construct a physname for the given DIE in CU. NAME may either be |
9825 | from a previous call to dwarf2_name or NULL. The result will be | |
9826 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9827 | name. | |
0114d602 | 9828 | |
9c37b5ae | 9829 | The output string will be canonicalized (if C++). */ |
0114d602 | 9830 | |
94af9270 | 9831 | static const char * |
15d034d0 | 9832 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9833 | { |
bb5ed363 | 9834 | struct objfile *objfile = cu->objfile; |
900e11f9 | 9835 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
9836 | int need_copy = 1; |
9837 | ||
9838 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9839 | on its own. */ | |
9840 | if (!die_needs_namespace (die, cu)) | |
9841 | return dwarf2_compute_name (name, die, cu, 1); | |
9842 | ||
73b9be8b | 9843 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9844 | |
e98c9e7c TT |
9845 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9846 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9847 | if (cu->language == language_rust && mangled != NULL | |
9848 | && strchr (mangled, '{') != NULL) | |
9849 | mangled = NULL; | |
9850 | ||
900e11f9 JK |
9851 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9852 | has computed. */ | |
791afaa2 | 9853 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 9854 | if (mangled != NULL) |
900e11f9 | 9855 | { |
900e11f9 JK |
9856 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9857 | type. It is easier for GDB users to search for such functions as | |
9858 | `name(params)' than `long name(params)'. In such case the minimal | |
9859 | symbol names do not match the full symbol names but for template | |
9860 | functions there is never a need to look up their definition from their | |
9861 | declaration so the only disadvantage remains the minimal symbol | |
9862 | variant `long name(params)' does not have the proper inferior type. | |
9863 | */ | |
9864 | ||
a766d390 DE |
9865 | if (cu->language == language_go) |
9866 | { | |
9867 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9868 | new_symbol_full assumes we return the mangled name. | |
9869 | This just undoes that lie until things are cleaned up. */ | |
a766d390 DE |
9870 | } |
9871 | else | |
9872 | { | |
791afaa2 TT |
9873 | demangled.reset (gdb_demangle (mangled, |
9874 | (DMGL_PARAMS | DMGL_ANSI | |
9875 | | DMGL_RET_DROP))); | |
a766d390 | 9876 | } |
900e11f9 | 9877 | if (demangled) |
791afaa2 | 9878 | canon = demangled.get (); |
900e11f9 JK |
9879 | else |
9880 | { | |
9881 | canon = mangled; | |
9882 | need_copy = 0; | |
9883 | } | |
9884 | } | |
9885 | ||
9886 | if (canon == NULL || check_physname) | |
9887 | { | |
9888 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9889 | ||
9890 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9891 | { | |
9892 | /* It may not mean a bug in GDB. The compiler could also | |
9893 | compute DW_AT_linkage_name incorrectly. But in such case | |
9894 | GDB would need to be bug-to-bug compatible. */ | |
9895 | ||
9896 | complaint (&symfile_complaints, | |
9897 | _("Computed physname <%s> does not match demangled <%s> " | |
9898 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9899 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9900 | objfile_name (objfile)); |
900e11f9 JK |
9901 | |
9902 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9903 | is available here - over computed PHYSNAME. It is safer | |
9904 | against both buggy GDB and buggy compilers. */ | |
9905 | ||
9906 | retval = canon; | |
9907 | } | |
9908 | else | |
9909 | { | |
9910 | retval = physname; | |
9911 | need_copy = 0; | |
9912 | } | |
9913 | } | |
9914 | else | |
9915 | retval = canon; | |
9916 | ||
9917 | if (need_copy) | |
224c3ddb SM |
9918 | retval = ((const char *) |
9919 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9920 | retval, strlen (retval))); | |
900e11f9 | 9921 | |
900e11f9 | 9922 | return retval; |
0114d602 DJ |
9923 | } |
9924 | ||
74921315 KS |
9925 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9926 | a new symbol for it. | |
9927 | ||
9928 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9929 | ||
9930 | static int | |
9931 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9932 | { | |
9933 | struct attribute *attr; | |
9934 | ||
9935 | /* If the die does not have a name, this is not a namespace | |
9936 | alias. */ | |
9937 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9938 | if (attr != NULL) | |
9939 | { | |
9940 | int num; | |
9941 | struct die_info *d = die; | |
9942 | struct dwarf2_cu *imported_cu = cu; | |
9943 | ||
9944 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9945 | keep inspecting DIEs until we hit the underlying import. */ | |
9946 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9947 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9948 | { | |
9949 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
9950 | if (attr == NULL) | |
9951 | break; | |
9952 | ||
9953 | d = follow_die_ref (d, attr, &imported_cu); | |
9954 | if (d->tag != DW_TAG_imported_declaration) | |
9955 | break; | |
9956 | } | |
9957 | ||
9958 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
9959 | { | |
9960 | complaint (&symfile_complaints, | |
9961 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 9962 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
9963 | return 0; |
9964 | } | |
9965 | ||
9966 | if (attr != NULL) | |
9967 | { | |
9968 | struct type *type; | |
9c541725 | 9969 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 9970 | |
9c541725 | 9971 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
9972 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
9973 | { | |
9974 | /* This declaration is a global namespace alias. Add | |
9975 | a symbol for it whose type is the aliased namespace. */ | |
9976 | new_symbol (die, type, cu); | |
9977 | return 1; | |
9978 | } | |
9979 | } | |
9980 | } | |
9981 | ||
9982 | return 0; | |
9983 | } | |
9984 | ||
22cee43f PMR |
9985 | /* Return the using directives repository (global or local?) to use in the |
9986 | current context for LANGUAGE. | |
9987 | ||
9988 | For Ada, imported declarations can materialize renamings, which *may* be | |
9989 | global. However it is impossible (for now?) in DWARF to distinguish | |
9990 | "external" imported declarations and "static" ones. As all imported | |
9991 | declarations seem to be static in all other languages, make them all CU-wide | |
9992 | global only in Ada. */ | |
9993 | ||
9994 | static struct using_direct ** | |
9995 | using_directives (enum language language) | |
9996 | { | |
9997 | if (language == language_ada && context_stack_depth == 0) | |
9998 | return &global_using_directives; | |
9999 | else | |
10000 | return &local_using_directives; | |
10001 | } | |
10002 | ||
27aa8d6a SW |
10003 | /* Read the import statement specified by the given die and record it. */ |
10004 | ||
10005 | static void | |
10006 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10007 | { | |
bb5ed363 | 10008 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 10009 | struct attribute *import_attr; |
32019081 | 10010 | struct die_info *imported_die, *child_die; |
de4affc9 | 10011 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10012 | const char *imported_name; |
794684b6 | 10013 | const char *imported_name_prefix; |
13387711 SW |
10014 | const char *canonical_name; |
10015 | const char *import_alias; | |
10016 | const char *imported_declaration = NULL; | |
794684b6 | 10017 | const char *import_prefix; |
eb1e02fd | 10018 | std::vector<const char *> excludes; |
13387711 | 10019 | |
27aa8d6a SW |
10020 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10021 | if (import_attr == NULL) | |
10022 | { | |
10023 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
10024 | dwarf_tag_name (die->tag)); | |
10025 | return; | |
10026 | } | |
10027 | ||
de4affc9 CC |
10028 | imported_cu = cu; |
10029 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10030 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10031 | if (imported_name == NULL) |
10032 | { | |
10033 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10034 | ||
10035 | The import in the following code: | |
10036 | namespace A | |
10037 | { | |
10038 | typedef int B; | |
10039 | } | |
10040 | ||
10041 | int main () | |
10042 | { | |
10043 | using A::B; | |
10044 | B b; | |
10045 | return b; | |
10046 | } | |
10047 | ||
10048 | ... | |
10049 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10050 | <52> DW_AT_decl_file : 1 | |
10051 | <53> DW_AT_decl_line : 6 | |
10052 | <54> DW_AT_import : <0x75> | |
10053 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10054 | <59> DW_AT_name : B | |
10055 | <5b> DW_AT_decl_file : 1 | |
10056 | <5c> DW_AT_decl_line : 2 | |
10057 | <5d> DW_AT_type : <0x6e> | |
10058 | ... | |
10059 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10060 | <76> DW_AT_byte_size : 4 | |
10061 | <77> DW_AT_encoding : 5 (signed) | |
10062 | ||
10063 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10064 | This case will be ignored until the gcc bug is fixed. */ | |
10065 | return; | |
10066 | } | |
10067 | ||
82856980 SW |
10068 | /* Figure out the local name after import. */ |
10069 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10070 | |
794684b6 SW |
10071 | /* Figure out where the statement is being imported to. */ |
10072 | import_prefix = determine_prefix (die, cu); | |
10073 | ||
10074 | /* Figure out what the scope of the imported die is and prepend it | |
10075 | to the name of the imported die. */ | |
de4affc9 | 10076 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10077 | |
f55ee35c JK |
10078 | if (imported_die->tag != DW_TAG_namespace |
10079 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10080 | { |
13387711 SW |
10081 | imported_declaration = imported_name; |
10082 | canonical_name = imported_name_prefix; | |
794684b6 | 10083 | } |
13387711 | 10084 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10085 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10086 | imported_name_prefix, |
10087 | (cu->language == language_d ? "." : "::"), | |
10088 | imported_name, (char *) NULL); | |
13387711 SW |
10089 | else |
10090 | canonical_name = imported_name; | |
794684b6 | 10091 | |
32019081 JK |
10092 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10093 | for (child_die = die->child; child_die && child_die->tag; | |
10094 | child_die = sibling_die (child_die)) | |
10095 | { | |
10096 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10097 | represented by an imported module entry with an import attribute | |
10098 | referring to the module and owned entries corresponding to those | |
10099 | entities that are renamed as part of being imported. */ | |
10100 | ||
10101 | if (child_die->tag != DW_TAG_imported_declaration) | |
10102 | { | |
10103 | complaint (&symfile_complaints, | |
10104 | _("child DW_TAG_imported_declaration expected " | |
10105 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 10106 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
10107 | continue; |
10108 | } | |
10109 | ||
10110 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10111 | if (import_attr == NULL) | |
10112 | { | |
10113 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
10114 | dwarf_tag_name (child_die->tag)); | |
10115 | continue; | |
10116 | } | |
10117 | ||
10118 | imported_cu = cu; | |
10119 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10120 | &imported_cu); | |
10121 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10122 | if (imported_name == NULL) | |
10123 | { | |
10124 | complaint (&symfile_complaints, | |
10125 | _("child DW_TAG_imported_declaration has unknown " | |
10126 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 10127 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
10128 | continue; |
10129 | } | |
10130 | ||
eb1e02fd | 10131 | excludes.push_back (imported_name); |
32019081 JK |
10132 | |
10133 | process_die (child_die, cu); | |
10134 | } | |
10135 | ||
22cee43f PMR |
10136 | add_using_directive (using_directives (cu->language), |
10137 | import_prefix, | |
10138 | canonical_name, | |
10139 | import_alias, | |
10140 | imported_declaration, | |
10141 | excludes, | |
10142 | 0, | |
10143 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10144 | } |
10145 | ||
5230b05a WT |
10146 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10147 | types, but gives them a size of zero. Starting with version 14, | |
10148 | ICC is compatible with GCC. */ | |
10149 | ||
10150 | static int | |
10151 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
10152 | { | |
10153 | if (!cu->checked_producer) | |
10154 | check_producer (cu); | |
10155 | ||
10156 | return cu->producer_is_icc_lt_14; | |
10157 | } | |
10158 | ||
1b80a9fa JK |
10159 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10160 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10161 | this, it was first present in GCC release 4.3.0. */ | |
10162 | ||
10163 | static int | |
10164 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
10165 | { | |
10166 | if (!cu->checked_producer) | |
10167 | check_producer (cu); | |
10168 | ||
10169 | return cu->producer_is_gcc_lt_4_3; | |
10170 | } | |
10171 | ||
d721ba37 PA |
10172 | static file_and_directory |
10173 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10174 | { |
d721ba37 PA |
10175 | file_and_directory res; |
10176 | ||
9291a0cd TT |
10177 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10178 | is not a source language identifier. */ | |
d721ba37 PA |
10179 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10180 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10181 | |
d721ba37 PA |
10182 | if (res.comp_dir == NULL |
10183 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10184 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10185 | { |
d721ba37 PA |
10186 | res.comp_dir_storage = ldirname (res.name); |
10187 | if (!res.comp_dir_storage.empty ()) | |
10188 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10189 | } |
d721ba37 | 10190 | if (res.comp_dir != NULL) |
9291a0cd TT |
10191 | { |
10192 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10193 | directory, get rid of it. */ | |
d721ba37 | 10194 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10195 | |
d721ba37 PA |
10196 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10197 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10198 | } |
10199 | ||
d721ba37 PA |
10200 | if (res.name == NULL) |
10201 | res.name = "<unknown>"; | |
10202 | ||
10203 | return res; | |
9291a0cd TT |
10204 | } |
10205 | ||
f4dc4d17 DE |
10206 | /* Handle DW_AT_stmt_list for a compilation unit. |
10207 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10208 | COMP_DIR is the compilation directory. LOWPC is passed to |
10209 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10210 | |
10211 | static void | |
10212 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10213 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10214 | { |
527f3840 | 10215 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 10216 | struct attribute *attr; |
527f3840 JK |
10217 | struct line_header line_header_local; |
10218 | hashval_t line_header_local_hash; | |
10219 | unsigned u; | |
10220 | void **slot; | |
10221 | int decode_mapping; | |
2ab95328 | 10222 | |
f4dc4d17 DE |
10223 | gdb_assert (! cu->per_cu->is_debug_types); |
10224 | ||
2ab95328 | 10225 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
10226 | if (attr == NULL) |
10227 | return; | |
10228 | ||
9c541725 | 10229 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10230 | |
10231 | /* The line header hash table is only created if needed (it exists to | |
10232 | prevent redundant reading of the line table for partial_units). | |
10233 | If we're given a partial_unit, we'll need it. If we're given a | |
10234 | compile_unit, then use the line header hash table if it's already | |
10235 | created, but don't create one just yet. */ | |
10236 | ||
10237 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10238 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10239 | { |
527f3840 JK |
10240 | dwarf2_per_objfile->line_header_hash |
10241 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
10242 | line_header_eq_voidp, | |
10243 | free_line_header_voidp, | |
10244 | &objfile->objfile_obstack, | |
10245 | hashtab_obstack_allocate, | |
10246 | dummy_obstack_deallocate); | |
10247 | } | |
2ab95328 | 10248 | |
9c541725 | 10249 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10250 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10251 | line_header_local_hash = line_header_hash (&line_header_local); | |
10252 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10253 | { | |
10254 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10255 | &line_header_local, | |
10256 | line_header_local_hash, NO_INSERT); | |
10257 | ||
10258 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10259 | is not present in *SLOT (since if there is something in *SLOT then | |
10260 | it will be for a partial_unit). */ | |
10261 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10262 | { |
527f3840 | 10263 | gdb_assert (*slot != NULL); |
9a3c8263 | 10264 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10265 | return; |
dee91e82 | 10266 | } |
2ab95328 | 10267 | } |
527f3840 JK |
10268 | |
10269 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10270 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10271 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10272 | if (lh == NULL) | |
527f3840 | 10273 | return; |
4c8aa72d PA |
10274 | |
10275 | cu->line_header = lh.release (); | |
10276 | cu->line_header_die_owner = die; | |
527f3840 JK |
10277 | |
10278 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10279 | slot = NULL; | |
10280 | else | |
10281 | { | |
10282 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10283 | &line_header_local, | |
10284 | line_header_local_hash, INSERT); | |
10285 | gdb_assert (slot != NULL); | |
10286 | } | |
10287 | if (slot != NULL && *slot == NULL) | |
10288 | { | |
10289 | /* This newly decoded line number information unit will be owned | |
10290 | by line_header_hash hash table. */ | |
10291 | *slot = cu->line_header; | |
4c8aa72d | 10292 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10293 | } |
10294 | else | |
10295 | { | |
10296 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10297 | may be already used by multiple CUs. Create only temporary decoded | |
10298 | line_header for this CU - it may happen at most once for each line | |
10299 | number information unit. And if we're not using line_header_hash | |
10300 | then this is what we want as well. */ | |
10301 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10302 | } |
10303 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10304 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10305 | decode_mapping); | |
fff8551c | 10306 | |
2ab95328 TT |
10307 | } |
10308 | ||
95554aad | 10309 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10310 | |
c906108c | 10311 | static void |
e7c27a73 | 10312 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10313 | { |
dee91e82 | 10314 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10315 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10316 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10317 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10318 | struct attribute *attr; | |
c906108c | 10319 | struct die_info *child_die; |
e142c38c | 10320 | CORE_ADDR baseaddr; |
6e70227d | 10321 | |
e142c38c | 10322 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 10323 | |
fae299cd | 10324 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10325 | |
10326 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10327 | from finish_block. */ | |
2acceee2 | 10328 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10329 | lowpc = highpc; |
3e29f34a | 10330 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10331 | |
d721ba37 | 10332 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10333 | |
95554aad | 10334 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 10335 | |
f4b8a18d KW |
10336 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10337 | standardised yet. As a workaround for the language detection we fall | |
10338 | back to the DW_AT_producer string. */ | |
10339 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10340 | cu->language = language_opencl; | |
10341 | ||
3019eac3 DE |
10342 | /* Similar hack for Go. */ |
10343 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10344 | set_cu_language (DW_LANG_Go, cu); | |
10345 | ||
d721ba37 | 10346 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10347 | |
10348 | /* Decode line number information if present. We do this before | |
10349 | processing child DIEs, so that the line header table is available | |
10350 | for DW_AT_decl_file. */ | |
d721ba37 | 10351 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10352 | |
10353 | /* Process all dies in compilation unit. */ | |
10354 | if (die->child != NULL) | |
10355 | { | |
10356 | child_die = die->child; | |
10357 | while (child_die && child_die->tag) | |
10358 | { | |
10359 | process_die (child_die, cu); | |
10360 | child_die = sibling_die (child_die); | |
10361 | } | |
10362 | } | |
10363 | ||
10364 | /* Decode macro information, if present. Dwarf 2 macro information | |
10365 | refers to information in the line number info statement program | |
10366 | header, so we can only read it if we've read the header | |
10367 | successfully. */ | |
0af92d60 JK |
10368 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10369 | if (attr == NULL) | |
10370 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10371 | if (attr && cu->line_header) |
10372 | { | |
10373 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
10374 | complaint (&symfile_complaints, | |
0af92d60 | 10375 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10376 | |
43f3e411 | 10377 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10378 | } |
10379 | else | |
10380 | { | |
10381 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10382 | if (attr && cu->line_header) | |
10383 | { | |
10384 | unsigned int macro_offset = DW_UNSND (attr); | |
10385 | ||
43f3e411 | 10386 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10387 | } |
10388 | } | |
3019eac3 DE |
10389 | } |
10390 | ||
f4dc4d17 DE |
10391 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
10392 | Create the set of symtabs used by this TU, or if this TU is sharing | |
10393 | symtabs with another TU and the symtabs have already been created | |
10394 | then restore those symtabs in the line header. | |
10395 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
10396 | |
10397 | static void | |
f4dc4d17 | 10398 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 10399 | { |
f4dc4d17 DE |
10400 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
10401 | struct type_unit_group *tu_group; | |
10402 | int first_time; | |
3019eac3 | 10403 | struct attribute *attr; |
9c541725 | 10404 | unsigned int i; |
0186c6a7 | 10405 | struct signatured_type *sig_type; |
3019eac3 | 10406 | |
f4dc4d17 | 10407 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10408 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10409 | |
f4dc4d17 | 10410 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 10411 | |
f4dc4d17 | 10412 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10413 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
10414 | if (sig_type->type_unit_group == NULL) |
10415 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
10416 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
10417 | |
10418 | /* If we've already processed this stmt_list there's no real need to | |
10419 | do it again, we could fake it and just recreate the part we need | |
10420 | (file name,index -> symtab mapping). If data shows this optimization | |
10421 | is useful we can do it then. */ | |
43f3e411 | 10422 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10423 | |
10424 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10425 | debug info. */ | |
fff8551c | 10426 | line_header_up lh; |
f4dc4d17 | 10427 | if (attr != NULL) |
3019eac3 | 10428 | { |
9c541725 | 10429 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
10430 | lh = dwarf_decode_line_header (line_offset, cu); |
10431 | } | |
10432 | if (lh == NULL) | |
10433 | { | |
10434 | if (first_time) | |
10435 | dwarf2_start_symtab (cu, "", NULL, 0); | |
10436 | else | |
10437 | { | |
10438 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 10439 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10440 | } |
f4dc4d17 | 10441 | return; |
3019eac3 DE |
10442 | } |
10443 | ||
4c8aa72d PA |
10444 | cu->line_header = lh.release (); |
10445 | cu->line_header_die_owner = die; | |
3019eac3 | 10446 | |
f4dc4d17 DE |
10447 | if (first_time) |
10448 | { | |
43f3e411 | 10449 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 10450 | |
1fd60fc0 DE |
10451 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10452 | still initializing it, and our caller (a few levels up) | |
10453 | process_full_type_unit still needs to know if this is the first | |
10454 | time. */ | |
10455 | ||
4c8aa72d PA |
10456 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
10457 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
10458 | cu->line_header->file_names.size ()); | |
3019eac3 | 10459 | |
4c8aa72d | 10460 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10461 | { |
4c8aa72d | 10462 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 10463 | |
4c8aa72d | 10464 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 10465 | |
f4dc4d17 DE |
10466 | if (current_subfile->symtab == NULL) |
10467 | { | |
4c8aa72d PA |
10468 | /* NOTE: start_subfile will recognize when it's been |
10469 | passed a file it has already seen. So we can't | |
10470 | assume there's a simple mapping from | |
10471 | cu->line_header->file_names to subfiles, plus | |
10472 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
10473 | current_subfile->symtab |
10474 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
10475 | } |
10476 | ||
8c43009f PA |
10477 | fe.symtab = current_subfile->symtab; |
10478 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
10479 | } |
10480 | } | |
10481 | else | |
3019eac3 | 10482 | { |
0ab9ce85 | 10483 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10484 | |
4c8aa72d | 10485 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10486 | { |
4c8aa72d | 10487 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 10488 | |
4c8aa72d | 10489 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10490 | } |
3019eac3 DE |
10491 | } |
10492 | ||
f4dc4d17 DE |
10493 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10494 | so they don't have a "real" (so to speak) symtab anyway. | |
10495 | There is later code that will assign the main symtab to all symbols | |
10496 | that don't have one. We need to handle the case of a symbol with a | |
10497 | missing symtab (DW_AT_decl_file) anyway. */ | |
10498 | } | |
3019eac3 | 10499 | |
f4dc4d17 DE |
10500 | /* Process DW_TAG_type_unit. |
10501 | For TUs we want to skip the first top level sibling if it's not the | |
10502 | actual type being defined by this TU. In this case the first top | |
10503 | level sibling is there to provide context only. */ | |
3019eac3 | 10504 | |
f4dc4d17 DE |
10505 | static void |
10506 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10507 | { | |
10508 | struct die_info *child_die; | |
3019eac3 | 10509 | |
f4dc4d17 DE |
10510 | prepare_one_comp_unit (cu, die, language_minimal); |
10511 | ||
10512 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10513 | We do this before processing child DIEs, so that the line header table | |
10514 | is available for DW_AT_decl_file. */ | |
10515 | setup_type_unit_groups (die, cu); | |
10516 | ||
10517 | if (die->child != NULL) | |
10518 | { | |
10519 | child_die = die->child; | |
10520 | while (child_die && child_die->tag) | |
10521 | { | |
10522 | process_die (child_die, cu); | |
10523 | child_die = sibling_die (child_die); | |
10524 | } | |
10525 | } | |
3019eac3 DE |
10526 | } |
10527 | \f | |
80626a55 DE |
10528 | /* DWO/DWP files. |
10529 | ||
10530 | http://gcc.gnu.org/wiki/DebugFission | |
10531 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10532 | ||
10533 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10534 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10535 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10536 | |
10537 | static hashval_t | |
10538 | hash_dwo_file (const void *item) | |
10539 | { | |
9a3c8263 | 10540 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10541 | hashval_t hash; |
3019eac3 | 10542 | |
a2ce51a0 DE |
10543 | hash = htab_hash_string (dwo_file->dwo_name); |
10544 | if (dwo_file->comp_dir != NULL) | |
10545 | hash += htab_hash_string (dwo_file->comp_dir); | |
10546 | return hash; | |
3019eac3 DE |
10547 | } |
10548 | ||
10549 | static int | |
10550 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10551 | { | |
9a3c8263 SM |
10552 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10553 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10554 | |
a2ce51a0 DE |
10555 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10556 | return 0; | |
10557 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10558 | return lhs->comp_dir == rhs->comp_dir; | |
10559 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10560 | } |
10561 | ||
10562 | /* Allocate a hash table for DWO files. */ | |
10563 | ||
10564 | static htab_t | |
10565 | allocate_dwo_file_hash_table (void) | |
10566 | { | |
10567 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10568 | ||
10569 | return htab_create_alloc_ex (41, | |
10570 | hash_dwo_file, | |
10571 | eq_dwo_file, | |
10572 | NULL, | |
10573 | &objfile->objfile_obstack, | |
10574 | hashtab_obstack_allocate, | |
10575 | dummy_obstack_deallocate); | |
10576 | } | |
10577 | ||
80626a55 DE |
10578 | /* Lookup DWO file DWO_NAME. */ |
10579 | ||
10580 | static void ** | |
0ac5b59e | 10581 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
10582 | { |
10583 | struct dwo_file find_entry; | |
10584 | void **slot; | |
10585 | ||
10586 | if (dwarf2_per_objfile->dwo_files == NULL) | |
10587 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
10588 | ||
10589 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
10590 | find_entry.dwo_name = dwo_name; |
10591 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
10592 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
10593 | ||
10594 | return slot; | |
10595 | } | |
10596 | ||
3019eac3 DE |
10597 | static hashval_t |
10598 | hash_dwo_unit (const void *item) | |
10599 | { | |
9a3c8263 | 10600 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
10601 | |
10602 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
10603 | return dwo_unit->signature; | |
10604 | } | |
10605 | ||
10606 | static int | |
10607 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
10608 | { | |
9a3c8263 SM |
10609 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
10610 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
10611 | |
10612 | /* The signature is assumed to be unique within the DWO file. | |
10613 | So while object file CU dwo_id's always have the value zero, | |
10614 | that's OK, assuming each object file DWO file has only one CU, | |
10615 | and that's the rule for now. */ | |
10616 | return lhs->signature == rhs->signature; | |
10617 | } | |
10618 | ||
10619 | /* Allocate a hash table for DWO CUs,TUs. | |
10620 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
10621 | ||
10622 | static htab_t | |
10623 | allocate_dwo_unit_table (struct objfile *objfile) | |
10624 | { | |
10625 | /* Start out with a pretty small number. | |
10626 | Generally DWO files contain only one CU and maybe some TUs. */ | |
10627 | return htab_create_alloc_ex (3, | |
10628 | hash_dwo_unit, | |
10629 | eq_dwo_unit, | |
10630 | NULL, | |
10631 | &objfile->objfile_obstack, | |
10632 | hashtab_obstack_allocate, | |
10633 | dummy_obstack_deallocate); | |
10634 | } | |
10635 | ||
80626a55 | 10636 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 10637 | |
19c3d4c9 | 10638 | struct create_dwo_cu_data |
3019eac3 DE |
10639 | { |
10640 | struct dwo_file *dwo_file; | |
19c3d4c9 | 10641 | struct dwo_unit dwo_unit; |
3019eac3 DE |
10642 | }; |
10643 | ||
19c3d4c9 | 10644 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
10645 | |
10646 | static void | |
19c3d4c9 DE |
10647 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
10648 | const gdb_byte *info_ptr, | |
10649 | struct die_info *comp_unit_die, | |
10650 | int has_children, | |
10651 | void *datap) | |
3019eac3 DE |
10652 | { |
10653 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 10654 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 10655 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 10656 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 10657 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 10658 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 10659 | struct attribute *attr; |
3019eac3 DE |
10660 | |
10661 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
10662 | if (attr == NULL) | |
10663 | { | |
19c3d4c9 DE |
10664 | complaint (&symfile_complaints, |
10665 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
10666 | " its dwo_id [in module %s]"), | |
9c541725 | 10667 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
10668 | return; |
10669 | } | |
10670 | ||
3019eac3 DE |
10671 | dwo_unit->dwo_file = dwo_file; |
10672 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 10673 | dwo_unit->section = section; |
9c541725 | 10674 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
10675 | dwo_unit->length = cu->per_cu->length; |
10676 | ||
b4f54984 | 10677 | if (dwarf_read_debug) |
4031ecc5 | 10678 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
10679 | to_underlying (sect_off), |
10680 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
10681 | } |
10682 | ||
33c5cd75 | 10683 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 10684 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 10685 | |
33c5cd75 DB |
10686 | static void |
10687 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
10688 | htab_t &cus_htab) | |
3019eac3 DE |
10689 | { |
10690 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
33c5cd75 | 10691 | const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev; |
d521ce57 | 10692 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 10693 | |
33c5cd75 DB |
10694 | dwarf2_read_section (objfile, §ion); |
10695 | info_ptr = section.buffer; | |
3019eac3 DE |
10696 | |
10697 | if (info_ptr == NULL) | |
33c5cd75 | 10698 | return; |
3019eac3 | 10699 | |
b4f54984 | 10700 | if (dwarf_read_debug) |
19c3d4c9 DE |
10701 | { |
10702 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
10703 | get_section_name (§ion), |
10704 | get_section_file_name (§ion)); | |
19c3d4c9 | 10705 | } |
3019eac3 | 10706 | |
33c5cd75 | 10707 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
10708 | while (info_ptr < end_ptr) |
10709 | { | |
10710 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
10711 | struct create_dwo_cu_data create_dwo_cu_data; |
10712 | struct dwo_unit *dwo_unit; | |
10713 | void **slot; | |
10714 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 10715 | |
19c3d4c9 DE |
10716 | memset (&create_dwo_cu_data.dwo_unit, 0, |
10717 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
10718 | memset (&per_cu, 0, sizeof (per_cu)); |
10719 | per_cu.objfile = objfile; | |
10720 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
10721 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
10722 | per_cu.section = §ion; | |
c5ed0576 | 10723 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
10724 | |
10725 | init_cutu_and_read_dies_no_follow ( | |
10726 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
10727 | info_ptr += per_cu.length; | |
10728 | ||
10729 | // If the unit could not be parsed, skip it. | |
10730 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
10731 | continue; | |
3019eac3 | 10732 | |
33c5cd75 DB |
10733 | if (cus_htab == NULL) |
10734 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 10735 | |
33c5cd75 DB |
10736 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
10737 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
10738 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
10739 | gdb_assert (slot != NULL); | |
10740 | if (*slot != NULL) | |
19c3d4c9 | 10741 | { |
33c5cd75 DB |
10742 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
10743 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 10744 | |
33c5cd75 DB |
10745 | complaint (&symfile_complaints, |
10746 | _("debug cu entry at offset 0x%x is duplicate to" | |
10747 | " the entry at offset 0x%x, signature %s"), | |
10748 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
10749 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 10750 | } |
33c5cd75 | 10751 | *slot = (void *)dwo_unit; |
3019eac3 | 10752 | } |
3019eac3 DE |
10753 | } |
10754 | ||
80626a55 DE |
10755 | /* DWP file .debug_{cu,tu}_index section format: |
10756 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
10757 | ||
d2415c6c DE |
10758 | DWP Version 1: |
10759 | ||
80626a55 DE |
10760 | Both index sections have the same format, and serve to map a 64-bit |
10761 | signature to a set of section numbers. Each section begins with a header, | |
10762 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
10763 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
10764 | aligned at 8-byte boundaries in the file. | |
10765 | ||
d2415c6c DE |
10766 | The index section header consists of: |
10767 | ||
10768 | V, 32 bit version number | |
10769 | -, 32 bits unused | |
10770 | N, 32 bit number of compilation units or type units in the index | |
10771 | M, 32 bit number of slots in the hash table | |
80626a55 | 10772 | |
d2415c6c | 10773 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 10774 | |
d2415c6c DE |
10775 | The hash table begins at offset 16 in the section, and consists of an array |
10776 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
10777 | order of the application binary). Unused slots in the hash table are 0. | |
10778 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 10779 | |
d2415c6c DE |
10780 | The parallel table begins immediately after the hash table |
10781 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
10782 | array of 32-bit indexes (using the byte order of the application binary), | |
10783 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
10784 | table contains a 32-bit index into the pool of section numbers. For unused | |
10785 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 10786 | |
73869dc2 DE |
10787 | The pool of section numbers begins immediately following the hash table |
10788 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
10789 | section numbers consists of an array of 32-bit words (using the byte order | |
10790 | of the application binary). Each item in the array is indexed starting | |
10791 | from 0. The hash table entry provides the index of the first section | |
10792 | number in the set. Additional section numbers in the set follow, and the | |
10793 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
10794 | ||
10795 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10796 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10797 | be the second entry. Other members of the set may follow in any order. | |
10798 | ||
10799 | --- | |
10800 | ||
10801 | DWP Version 2: | |
10802 | ||
10803 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
10804 | and the entries in the index tables are now offsets into these sections. | |
10805 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10806 | section. | |
10807 | ||
10808 | Index Section Contents: | |
10809 | Header | |
10810 | Hash Table of Signatures dwp_hash_table.hash_table | |
10811 | Parallel Table of Indices dwp_hash_table.unit_table | |
10812 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
10813 | Table of Section Sizes dwp_hash_table.v2.sizes | |
10814 | ||
10815 | The index section header consists of: | |
10816 | ||
10817 | V, 32 bit version number | |
10818 | L, 32 bit number of columns in the table of section offsets | |
10819 | N, 32 bit number of compilation units or type units in the index | |
10820 | M, 32 bit number of slots in the hash table | |
10821 | ||
10822 | Numbers are recorded using the byte order of the application binary. | |
10823 | ||
10824 | The hash table has the same format as version 1. | |
10825 | The parallel table of indices has the same format as version 1, | |
10826 | except that the entries are origin-1 indices into the table of sections | |
10827 | offsets and the table of section sizes. | |
10828 | ||
10829 | The table of offsets begins immediately following the parallel table | |
10830 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10831 | a two-dimensional array of 32-bit words (using the byte order of the | |
10832 | application binary), with L columns and N+1 rows, in row-major order. | |
10833 | Each row in the array is indexed starting from 0. The first row provides | |
10834 | a key to the remaining rows: each column in this row provides an identifier | |
10835 | for a debug section, and the offsets in the same column of subsequent rows | |
10836 | refer to that section. The section identifiers are: | |
10837 | ||
10838 | DW_SECT_INFO 1 .debug_info.dwo | |
10839 | DW_SECT_TYPES 2 .debug_types.dwo | |
10840 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10841 | DW_SECT_LINE 4 .debug_line.dwo | |
10842 | DW_SECT_LOC 5 .debug_loc.dwo | |
10843 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10844 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10845 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10846 | ||
10847 | The offsets provided by the CU and TU index sections are the base offsets | |
10848 | for the contributions made by each CU or TU to the corresponding section | |
10849 | in the package file. Each CU and TU header contains an abbrev_offset | |
10850 | field, used to find the abbreviations table for that CU or TU within the | |
10851 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10852 | be interpreted as relative to the base offset given in the index section. | |
10853 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10854 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10855 | and offsets into other debug sections obtained from DWARF attributes should | |
10856 | also be interpreted as relative to the corresponding base offset. | |
10857 | ||
10858 | The table of sizes begins immediately following the table of offsets. | |
10859 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10860 | with L columns and N rows, in row-major order. Each row in the array is | |
10861 | indexed starting from 1 (row 0 is shared by the two tables). | |
10862 | ||
10863 | --- | |
10864 | ||
10865 | Hash table lookup is handled the same in version 1 and 2: | |
10866 | ||
10867 | We assume that N and M will not exceed 2^32 - 1. | |
10868 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10869 | ||
d2415c6c DE |
10870 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10871 | in the hash table is located as follows: | |
80626a55 | 10872 | |
d2415c6c DE |
10873 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10874 | the low-order k bits all set to 1. | |
80626a55 | 10875 | |
d2415c6c | 10876 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10877 | |
d2415c6c DE |
10878 | 3) If the hash table entry at index H matches the signature, use that |
10879 | entry. If the hash table entry at index H is unused (all zeroes), | |
10880 | terminate the search: the signature is not present in the table. | |
80626a55 | 10881 | |
d2415c6c | 10882 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10883 | |
d2415c6c | 10884 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10885 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10886 | |
10887 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10888 | .debug_{info,types}.dwo in DWP_FILE. | |
10889 | Returns NULL if there isn't one. | |
10890 | Note: This function processes DWP files only, not DWO files. */ | |
10891 | ||
10892 | static struct dwp_hash_table * | |
10893 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10894 | { | |
10895 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10896 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10897 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10898 | struct dwarf2_section_info *index; |
73869dc2 | 10899 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10900 | struct dwp_hash_table *htab; |
10901 | ||
10902 | if (is_debug_types) | |
10903 | index = &dwp_file->sections.tu_index; | |
10904 | else | |
10905 | index = &dwp_file->sections.cu_index; | |
10906 | ||
10907 | if (dwarf2_section_empty_p (index)) | |
10908 | return NULL; | |
10909 | dwarf2_read_section (objfile, index); | |
10910 | ||
10911 | index_ptr = index->buffer; | |
10912 | index_end = index_ptr + index->size; | |
10913 | ||
10914 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10915 | index_ptr += 4; |
10916 | if (version == 2) | |
10917 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10918 | else | |
10919 | nr_columns = 0; | |
10920 | index_ptr += 4; | |
80626a55 DE |
10921 | nr_units = read_4_bytes (dbfd, index_ptr); |
10922 | index_ptr += 4; | |
10923 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10924 | index_ptr += 4; | |
10925 | ||
73869dc2 | 10926 | if (version != 1 && version != 2) |
80626a55 | 10927 | { |
21aa081e | 10928 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10929 | " [in module %s]"), |
21aa081e | 10930 | pulongest (version), dwp_file->name); |
80626a55 DE |
10931 | } |
10932 | if (nr_slots != (nr_slots & -nr_slots)) | |
10933 | { | |
21aa081e | 10934 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10935 | " is not power of 2 [in module %s]"), |
21aa081e | 10936 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10937 | } |
10938 | ||
10939 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10940 | htab->version = version; |
10941 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10942 | htab->nr_units = nr_units; |
10943 | htab->nr_slots = nr_slots; | |
10944 | htab->hash_table = index_ptr; | |
10945 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10946 | |
10947 | /* Exit early if the table is empty. */ | |
10948 | if (nr_slots == 0 || nr_units == 0 | |
10949 | || (version == 2 && nr_columns == 0)) | |
10950 | { | |
10951 | /* All must be zero. */ | |
10952 | if (nr_slots != 0 || nr_units != 0 | |
10953 | || (version == 2 && nr_columns != 0)) | |
10954 | { | |
10955 | complaint (&symfile_complaints, | |
10956 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
10957 | " all zero [in modules %s]"), | |
10958 | dwp_file->name); | |
10959 | } | |
10960 | return htab; | |
10961 | } | |
10962 | ||
10963 | if (version == 1) | |
10964 | { | |
10965 | htab->section_pool.v1.indices = | |
10966 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10967 | /* It's harder to decide whether the section is too small in v1. | |
10968 | V1 is deprecated anyway so we punt. */ | |
10969 | } | |
10970 | else | |
10971 | { | |
10972 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10973 | int *ids = htab->section_pool.v2.section_ids; | |
10974 | /* Reverse map for error checking. */ | |
10975 | int ids_seen[DW_SECT_MAX + 1]; | |
10976 | int i; | |
10977 | ||
10978 | if (nr_columns < 2) | |
10979 | { | |
10980 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
10981 | " in section table [in module %s]"), | |
10982 | dwp_file->name); | |
10983 | } | |
10984 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
10985 | { | |
10986 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
10987 | " in section table [in module %s]"), | |
10988 | dwp_file->name); | |
10989 | } | |
10990 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10991 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10992 | for (i = 0; i < nr_columns; ++i) | |
10993 | { | |
10994 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
10995 | ||
10996 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
10997 | { | |
10998 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
10999 | " in section table [in module %s]"), | |
11000 | id, dwp_file->name); | |
11001 | } | |
11002 | if (ids_seen[id] != -1) | |
11003 | { | |
11004 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11005 | " id %d in section table [in module %s]"), | |
11006 | id, dwp_file->name); | |
11007 | } | |
11008 | ids_seen[id] = i; | |
11009 | ids[i] = id; | |
11010 | } | |
11011 | /* Must have exactly one info or types section. */ | |
11012 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11013 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11014 | != 1) | |
11015 | { | |
11016 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11017 | " DWO info/types section [in module %s]"), | |
11018 | dwp_file->name); | |
11019 | } | |
11020 | /* Must have an abbrev section. */ | |
11021 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11022 | { | |
11023 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11024 | " section [in module %s]"), | |
11025 | dwp_file->name); | |
11026 | } | |
11027 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11028 | htab->section_pool.v2.sizes = | |
11029 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11030 | * nr_units * nr_columns); | |
11031 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11032 | * nr_units * nr_columns)) | |
11033 | > index_end) | |
11034 | { | |
11035 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11036 | " [in module %s]"), | |
11037 | dwp_file->name); | |
11038 | } | |
11039 | } | |
80626a55 DE |
11040 | |
11041 | return htab; | |
11042 | } | |
11043 | ||
11044 | /* Update SECTIONS with the data from SECTP. | |
11045 | ||
11046 | This function is like the other "locate" section routines that are | |
11047 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 11048 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
11049 | |
11050 | The result is non-zero for success, or zero if an error was found. */ | |
11051 | ||
11052 | static int | |
73869dc2 DE |
11053 | locate_v1_virtual_dwo_sections (asection *sectp, |
11054 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11055 | { |
11056 | const struct dwop_section_names *names = &dwop_section_names; | |
11057 | ||
11058 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11059 | { | |
11060 | /* There can be only one. */ | |
049412e3 | 11061 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11062 | return 0; |
049412e3 | 11063 | sections->abbrev.s.section = sectp; |
80626a55 DE |
11064 | sections->abbrev.size = bfd_get_section_size (sectp); |
11065 | } | |
11066 | else if (section_is_p (sectp->name, &names->info_dwo) | |
11067 | || section_is_p (sectp->name, &names->types_dwo)) | |
11068 | { | |
11069 | /* There can be only one. */ | |
049412e3 | 11070 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11071 | return 0; |
049412e3 | 11072 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
11073 | sections->info_or_types.size = bfd_get_section_size (sectp); |
11074 | } | |
11075 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11076 | { | |
11077 | /* There can be only one. */ | |
049412e3 | 11078 | if (sections->line.s.section != NULL) |
80626a55 | 11079 | return 0; |
049412e3 | 11080 | sections->line.s.section = sectp; |
80626a55 DE |
11081 | sections->line.size = bfd_get_section_size (sectp); |
11082 | } | |
11083 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11084 | { | |
11085 | /* There can be only one. */ | |
049412e3 | 11086 | if (sections->loc.s.section != NULL) |
80626a55 | 11087 | return 0; |
049412e3 | 11088 | sections->loc.s.section = sectp; |
80626a55 DE |
11089 | sections->loc.size = bfd_get_section_size (sectp); |
11090 | } | |
11091 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11092 | { | |
11093 | /* There can be only one. */ | |
049412e3 | 11094 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11095 | return 0; |
049412e3 | 11096 | sections->macinfo.s.section = sectp; |
80626a55 DE |
11097 | sections->macinfo.size = bfd_get_section_size (sectp); |
11098 | } | |
11099 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11100 | { | |
11101 | /* There can be only one. */ | |
049412e3 | 11102 | if (sections->macro.s.section != NULL) |
80626a55 | 11103 | return 0; |
049412e3 | 11104 | sections->macro.s.section = sectp; |
80626a55 DE |
11105 | sections->macro.size = bfd_get_section_size (sectp); |
11106 | } | |
11107 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11108 | { | |
11109 | /* There can be only one. */ | |
049412e3 | 11110 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11111 | return 0; |
049412e3 | 11112 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
11113 | sections->str_offsets.size = bfd_get_section_size (sectp); |
11114 | } | |
11115 | else | |
11116 | { | |
11117 | /* No other kind of section is valid. */ | |
11118 | return 0; | |
11119 | } | |
11120 | ||
11121 | return 1; | |
11122 | } | |
11123 | ||
73869dc2 DE |
11124 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11125 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11126 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11127 | This is for DWP version 1 files. */ | |
80626a55 DE |
11128 | |
11129 | static struct dwo_unit * | |
73869dc2 DE |
11130 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
11131 | uint32_t unit_index, | |
11132 | const char *comp_dir, | |
11133 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
11134 | { |
11135 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
11136 | const struct dwp_hash_table *dwp_htab = |
11137 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
11138 | bfd *dbfd = dwp_file->dbfd; |
11139 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11140 | struct dwo_file *dwo_file; | |
11141 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11142 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11143 | void **dwo_file_slot; |
80626a55 DE |
11144 | int i; |
11145 | ||
73869dc2 DE |
11146 | gdb_assert (dwp_file->version == 1); |
11147 | ||
b4f54984 | 11148 | if (dwarf_read_debug) |
80626a55 | 11149 | { |
73869dc2 | 11150 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 11151 | kind, |
73869dc2 | 11152 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
11153 | dwp_file->name); |
11154 | } | |
11155 | ||
19ac8c2e | 11156 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11157 | Put a limit on the number of sections we look for so that bad data |
11158 | doesn't cause us to loop forever. */ | |
11159 | ||
73869dc2 | 11160 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11161 | (1 /* .debug_info or .debug_types */ \ |
11162 | + 1 /* .debug_abbrev */ \ | |
11163 | + 1 /* .debug_line */ \ | |
11164 | + 1 /* .debug_loc */ \ | |
11165 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11166 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11167 | + 1 /* trailing zero */) |
11168 | ||
11169 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11170 | |
73869dc2 | 11171 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11172 | { |
11173 | asection *sectp; | |
11174 | uint32_t section_nr = | |
11175 | read_4_bytes (dbfd, | |
73869dc2 DE |
11176 | dwp_htab->section_pool.v1.indices |
11177 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11178 | |
11179 | if (section_nr == 0) | |
11180 | break; | |
11181 | if (section_nr >= dwp_file->num_sections) | |
11182 | { | |
11183 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11184 | " [in module %s]"), | |
11185 | dwp_file->name); | |
11186 | } | |
11187 | ||
11188 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11189 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11190 | { |
11191 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11192 | " [in module %s]"), | |
11193 | dwp_file->name); | |
11194 | } | |
11195 | } | |
11196 | ||
11197 | if (i < 2 | |
a32a8923 DE |
11198 | || dwarf2_section_empty_p (§ions.info_or_types) |
11199 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
11200 | { |
11201 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11202 | " [in module %s]"), | |
11203 | dwp_file->name); | |
11204 | } | |
73869dc2 | 11205 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11206 | { |
11207 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11208 | " [in module %s]"), | |
11209 | dwp_file->name); | |
11210 | } | |
11211 | ||
11212 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11213 | have dwo_unit "live" in that. At least for now. | |
11214 | ||
11215 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11216 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11217 | file, we can combine them back into a virtual DWO file to save space |
11218 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11219 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11220 | ||
791afaa2 TT |
11221 | std::string virtual_dwo_name = |
11222 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
11223 | get_section_id (§ions.abbrev), | |
11224 | get_section_id (§ions.line), | |
11225 | get_section_id (§ions.loc), | |
11226 | get_section_id (§ions.str_offsets)); | |
80626a55 | 11227 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11228 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
80626a55 DE |
11229 | /* Create one if necessary. */ |
11230 | if (*dwo_file_slot == NULL) | |
11231 | { | |
b4f54984 | 11232 | if (dwarf_read_debug) |
80626a55 DE |
11233 | { |
11234 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11235 | virtual_dwo_name.c_str ()); |
80626a55 DE |
11236 | } |
11237 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11238 | dwo_file->dwo_name |
11239 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11240 | virtual_dwo_name.c_str (), |
11241 | virtual_dwo_name.size ()); | |
0ac5b59e | 11242 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11243 | dwo_file->sections.abbrev = sections.abbrev; |
11244 | dwo_file->sections.line = sections.line; | |
11245 | dwo_file->sections.loc = sections.loc; | |
11246 | dwo_file->sections.macinfo = sections.macinfo; | |
11247 | dwo_file->sections.macro = sections.macro; | |
11248 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11249 | /* The "str" section is global to the entire DWP file. */ | |
11250 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11251 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11252 | there's no need to record it in dwo_file. |
11253 | Also, we can't simply record type sections in dwo_file because | |
11254 | we record a pointer into the vector in dwo_unit. As we collect more | |
11255 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11256 | for it, invalidating all copies of pointers into the previous |
11257 | contents. */ | |
80626a55 DE |
11258 | *dwo_file_slot = dwo_file; |
11259 | } | |
11260 | else | |
11261 | { | |
b4f54984 | 11262 | if (dwarf_read_debug) |
80626a55 DE |
11263 | { |
11264 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11265 | virtual_dwo_name.c_str ()); |
80626a55 | 11266 | } |
9a3c8263 | 11267 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11268 | } |
80626a55 DE |
11269 | |
11270 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11271 | dwo_unit->dwo_file = dwo_file; | |
11272 | dwo_unit->signature = signature; | |
8d749320 SM |
11273 | dwo_unit->section = |
11274 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11275 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11276 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11277 | |
11278 | return dwo_unit; | |
11279 | } | |
11280 | ||
73869dc2 DE |
11281 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11282 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11283 | piece within that section used by a TU/CU, return a virtual section | |
11284 | of just that piece. */ | |
11285 | ||
11286 | static struct dwarf2_section_info | |
11287 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
11288 | bfd_size_type offset, bfd_size_type size) | |
11289 | { | |
11290 | struct dwarf2_section_info result; | |
11291 | asection *sectp; | |
11292 | ||
11293 | gdb_assert (section != NULL); | |
11294 | gdb_assert (!section->is_virtual); | |
11295 | ||
11296 | memset (&result, 0, sizeof (result)); | |
11297 | result.s.containing_section = section; | |
11298 | result.is_virtual = 1; | |
11299 | ||
11300 | if (size == 0) | |
11301 | return result; | |
11302 | ||
11303 | sectp = get_section_bfd_section (section); | |
11304 | ||
11305 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11306 | bounds of the real section. This is a pretty-rare event, so just | |
11307 | flag an error (easier) instead of a warning and trying to cope. */ | |
11308 | if (sectp == NULL | |
11309 | || offset + size > bfd_get_section_size (sectp)) | |
11310 | { | |
11311 | bfd *abfd = sectp->owner; | |
11312 | ||
11313 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
11314 | " in section %s [in module %s]"), | |
11315 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
11316 | objfile_name (dwarf2_per_objfile->objfile)); | |
11317 | } | |
11318 | ||
11319 | result.virtual_offset = offset; | |
11320 | result.size = size; | |
11321 | return result; | |
11322 | } | |
11323 | ||
11324 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11325 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11326 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11327 | This is for DWP version 2 files. */ | |
11328 | ||
11329 | static struct dwo_unit * | |
11330 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
11331 | uint32_t unit_index, | |
11332 | const char *comp_dir, | |
11333 | ULONGEST signature, int is_debug_types) | |
11334 | { | |
11335 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11336 | const struct dwp_hash_table *dwp_htab = | |
11337 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11338 | bfd *dbfd = dwp_file->dbfd; | |
11339 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11340 | struct dwo_file *dwo_file; | |
11341 | struct dwo_unit *dwo_unit; | |
11342 | struct virtual_v2_dwo_sections sections; | |
11343 | void **dwo_file_slot; | |
73869dc2 DE |
11344 | int i; |
11345 | ||
11346 | gdb_assert (dwp_file->version == 2); | |
11347 | ||
b4f54984 | 11348 | if (dwarf_read_debug) |
73869dc2 DE |
11349 | { |
11350 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11351 | kind, | |
11352 | pulongest (unit_index), hex_string (signature), | |
11353 | dwp_file->name); | |
11354 | } | |
11355 | ||
11356 | /* Fetch the section offsets of this DWO unit. */ | |
11357 | ||
11358 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11359 | |
11360 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11361 | { | |
11362 | uint32_t offset = read_4_bytes (dbfd, | |
11363 | dwp_htab->section_pool.v2.offsets | |
11364 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11365 | + i) | |
11366 | * sizeof (uint32_t))); | |
11367 | uint32_t size = read_4_bytes (dbfd, | |
11368 | dwp_htab->section_pool.v2.sizes | |
11369 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11370 | + i) | |
11371 | * sizeof (uint32_t))); | |
11372 | ||
11373 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11374 | { | |
11375 | case DW_SECT_INFO: | |
11376 | case DW_SECT_TYPES: | |
11377 | sections.info_or_types_offset = offset; | |
11378 | sections.info_or_types_size = size; | |
11379 | break; | |
11380 | case DW_SECT_ABBREV: | |
11381 | sections.abbrev_offset = offset; | |
11382 | sections.abbrev_size = size; | |
11383 | break; | |
11384 | case DW_SECT_LINE: | |
11385 | sections.line_offset = offset; | |
11386 | sections.line_size = size; | |
11387 | break; | |
11388 | case DW_SECT_LOC: | |
11389 | sections.loc_offset = offset; | |
11390 | sections.loc_size = size; | |
11391 | break; | |
11392 | case DW_SECT_STR_OFFSETS: | |
11393 | sections.str_offsets_offset = offset; | |
11394 | sections.str_offsets_size = size; | |
11395 | break; | |
11396 | case DW_SECT_MACINFO: | |
11397 | sections.macinfo_offset = offset; | |
11398 | sections.macinfo_size = size; | |
11399 | break; | |
11400 | case DW_SECT_MACRO: | |
11401 | sections.macro_offset = offset; | |
11402 | sections.macro_size = size; | |
11403 | break; | |
11404 | } | |
11405 | } | |
11406 | ||
11407 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11408 | have dwo_unit "live" in that. At least for now. | |
11409 | ||
11410 | The DWP file can be made up of a random collection of CUs and TUs. | |
11411 | However, for each CU + set of TUs that came from the same original DWO | |
11412 | file, we can combine them back into a virtual DWO file to save space | |
11413 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11414 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11415 | ||
791afaa2 TT |
11416 | std::string virtual_dwo_name = |
11417 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11418 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11419 | (long) (sections.line_size ? sections.line_offset : 0), | |
11420 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11421 | (long) (sections.str_offsets_size | |
11422 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11423 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11424 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
73869dc2 DE |
11425 | /* Create one if necessary. */ |
11426 | if (*dwo_file_slot == NULL) | |
11427 | { | |
b4f54984 | 11428 | if (dwarf_read_debug) |
73869dc2 DE |
11429 | { |
11430 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11431 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
11432 | } |
11433 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11434 | dwo_file->dwo_name |
11435 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11436 | virtual_dwo_name.c_str (), |
11437 | virtual_dwo_name.size ()); | |
73869dc2 DE |
11438 | dwo_file->comp_dir = comp_dir; |
11439 | dwo_file->sections.abbrev = | |
11440 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
11441 | sections.abbrev_offset, sections.abbrev_size); | |
11442 | dwo_file->sections.line = | |
11443 | create_dwp_v2_section (&dwp_file->sections.line, | |
11444 | sections.line_offset, sections.line_size); | |
11445 | dwo_file->sections.loc = | |
11446 | create_dwp_v2_section (&dwp_file->sections.loc, | |
11447 | sections.loc_offset, sections.loc_size); | |
11448 | dwo_file->sections.macinfo = | |
11449 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
11450 | sections.macinfo_offset, sections.macinfo_size); | |
11451 | dwo_file->sections.macro = | |
11452 | create_dwp_v2_section (&dwp_file->sections.macro, | |
11453 | sections.macro_offset, sections.macro_size); | |
11454 | dwo_file->sections.str_offsets = | |
11455 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
11456 | sections.str_offsets_offset, | |
11457 | sections.str_offsets_size); | |
11458 | /* The "str" section is global to the entire DWP file. */ | |
11459 | dwo_file->sections.str = dwp_file->sections.str; | |
11460 | /* The info or types section is assigned below to dwo_unit, | |
11461 | there's no need to record it in dwo_file. | |
11462 | Also, we can't simply record type sections in dwo_file because | |
11463 | we record a pointer into the vector in dwo_unit. As we collect more | |
11464 | types we'll grow the vector and eventually have to reallocate space | |
11465 | for it, invalidating all copies of pointers into the previous | |
11466 | contents. */ | |
11467 | *dwo_file_slot = dwo_file; | |
11468 | } | |
11469 | else | |
11470 | { | |
b4f54984 | 11471 | if (dwarf_read_debug) |
73869dc2 DE |
11472 | { |
11473 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11474 | virtual_dwo_name.c_str ()); |
73869dc2 | 11475 | } |
9a3c8263 | 11476 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11477 | } |
73869dc2 DE |
11478 | |
11479 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11480 | dwo_unit->dwo_file = dwo_file; | |
11481 | dwo_unit->signature = signature; | |
8d749320 SM |
11482 | dwo_unit->section = |
11483 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
11484 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
11485 | ? &dwp_file->sections.types | |
11486 | : &dwp_file->sections.info, | |
11487 | sections.info_or_types_offset, | |
11488 | sections.info_or_types_size); | |
11489 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11490 | ||
11491 | return dwo_unit; | |
11492 | } | |
11493 | ||
57d63ce2 DE |
11494 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11495 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11496 | |
11497 | static struct dwo_unit * | |
57d63ce2 DE |
11498 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
11499 | ULONGEST signature, int is_debug_types) | |
80626a55 | 11500 | { |
57d63ce2 DE |
11501 | const struct dwp_hash_table *dwp_htab = |
11502 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 11503 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 11504 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11505 | uint32_t hash = signature & mask; |
11506 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11507 | unsigned int i; | |
11508 | void **slot; | |
870f88f7 | 11509 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11510 | |
11511 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11512 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
11513 | slot = htab_find_slot (is_debug_types |
11514 | ? dwp_file->loaded_tus | |
11515 | : dwp_file->loaded_cus, | |
11516 | &find_dwo_cu, INSERT); | |
80626a55 DE |
11517 | |
11518 | if (*slot != NULL) | |
9a3c8263 | 11519 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11520 | |
11521 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11522 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11523 | { |
11524 | ULONGEST signature_in_table; | |
11525 | ||
11526 | signature_in_table = | |
57d63ce2 | 11527 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11528 | if (signature_in_table == signature) |
11529 | { | |
57d63ce2 DE |
11530 | uint32_t unit_index = |
11531 | read_4_bytes (dbfd, | |
11532 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11533 | |
73869dc2 DE |
11534 | if (dwp_file->version == 1) |
11535 | { | |
11536 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
11537 | comp_dir, signature, | |
11538 | is_debug_types); | |
11539 | } | |
11540 | else | |
11541 | { | |
11542 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
11543 | comp_dir, signature, | |
11544 | is_debug_types); | |
11545 | } | |
9a3c8263 | 11546 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11547 | } |
11548 | if (signature_in_table == 0) | |
11549 | return NULL; | |
11550 | hash = (hash + hash2) & mask; | |
11551 | } | |
11552 | ||
11553 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11554 | " [in module %s]"), | |
11555 | dwp_file->name); | |
11556 | } | |
11557 | ||
ab5088bf | 11558 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11559 | Open the file specified by FILE_NAME and hand it off to BFD for |
11560 | preliminary analysis. Return a newly initialized bfd *, which | |
11561 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 11562 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
11563 | SEARCH_CWD is true if the current directory is to be searched. |
11564 | It will be searched before debug-file-directory. | |
13aaf454 DE |
11565 | If successful, the file is added to the bfd include table of the |
11566 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 11567 | If unable to find/open the file, return NULL. |
3019eac3 DE |
11568 | NOTE: This function is derived from symfile_bfd_open. */ |
11569 | ||
192b62ce | 11570 | static gdb_bfd_ref_ptr |
6ac97d4c | 11571 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 11572 | { |
80626a55 | 11573 | int desc, flags; |
3019eac3 | 11574 | char *absolute_name; |
9c02c129 DE |
11575 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
11576 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
11577 | to debug_file_directory. */ | |
11578 | char *search_path; | |
11579 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
11580 | ||
6ac97d4c DE |
11581 | if (search_cwd) |
11582 | { | |
11583 | if (*debug_file_directory != '\0') | |
11584 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 11585 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
11586 | else |
11587 | search_path = xstrdup ("."); | |
11588 | } | |
9c02c129 | 11589 | else |
6ac97d4c | 11590 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 11591 | |
492c0ab7 | 11592 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
11593 | if (is_dwp) |
11594 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 11595 | desc = openp (search_path, flags, file_name, |
3019eac3 | 11596 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 11597 | xfree (search_path); |
3019eac3 DE |
11598 | if (desc < 0) |
11599 | return NULL; | |
11600 | ||
192b62ce | 11601 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 11602 | xfree (absolute_name); |
9c02c129 DE |
11603 | if (sym_bfd == NULL) |
11604 | return NULL; | |
192b62ce | 11605 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 11606 | |
192b62ce TT |
11607 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
11608 | return NULL; | |
3019eac3 | 11609 | |
13aaf454 DE |
11610 | /* Success. Record the bfd as having been included by the objfile's bfd. |
11611 | This is important because things like demangled_names_hash lives in the | |
11612 | objfile's per_bfd space and may have references to things like symbol | |
11613 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 11614 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 11615 | |
3019eac3 DE |
11616 | return sym_bfd; |
11617 | } | |
11618 | ||
ab5088bf | 11619 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
11620 | COMP_DIR is the DW_AT_comp_dir attribute. |
11621 | The result is the bfd handle of the file. | |
11622 | If there is a problem finding or opening the file, return NULL. | |
11623 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11624 | same as symfile_bfd_open. */ | |
11625 | ||
192b62ce | 11626 | static gdb_bfd_ref_ptr |
ab5088bf | 11627 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 11628 | { |
80626a55 | 11629 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 11630 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
11631 | |
11632 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
11633 | ||
11634 | if (comp_dir != NULL) | |
11635 | { | |
b36cec19 PA |
11636 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
11637 | file_name, (char *) NULL); | |
3019eac3 DE |
11638 | |
11639 | /* NOTE: If comp_dir is a relative path, this will also try the | |
11640 | search path, which seems useful. */ | |
192b62ce TT |
11641 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
11642 | 1 /*search_cwd*/)); | |
3019eac3 DE |
11643 | xfree (path_to_try); |
11644 | if (abfd != NULL) | |
11645 | return abfd; | |
11646 | } | |
11647 | ||
11648 | /* That didn't work, try debug-file-directory, which, despite its name, | |
11649 | is a list of paths. */ | |
11650 | ||
11651 | if (*debug_file_directory == '\0') | |
11652 | return NULL; | |
11653 | ||
6ac97d4c | 11654 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
11655 | } |
11656 | ||
80626a55 DE |
11657 | /* This function is mapped across the sections and remembers the offset and |
11658 | size of each of the DWO debugging sections we are interested in. */ | |
11659 | ||
11660 | static void | |
11661 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
11662 | { | |
9a3c8263 | 11663 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
11664 | const struct dwop_section_names *names = &dwop_section_names; |
11665 | ||
11666 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11667 | { | |
049412e3 | 11668 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
11669 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
11670 | } | |
11671 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11672 | { | |
049412e3 | 11673 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
11674 | dwo_sections->info.size = bfd_get_section_size (sectp); |
11675 | } | |
11676 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11677 | { | |
049412e3 | 11678 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
11679 | dwo_sections->line.size = bfd_get_section_size (sectp); |
11680 | } | |
11681 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11682 | { | |
049412e3 | 11683 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
11684 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
11685 | } | |
11686 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11687 | { | |
049412e3 | 11688 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
11689 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
11690 | } | |
11691 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11692 | { | |
049412e3 | 11693 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
11694 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
11695 | } | |
11696 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
11697 | { | |
049412e3 | 11698 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
11699 | dwo_sections->str.size = bfd_get_section_size (sectp); |
11700 | } | |
11701 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11702 | { | |
049412e3 | 11703 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
11704 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
11705 | } | |
11706 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11707 | { | |
11708 | struct dwarf2_section_info type_section; | |
11709 | ||
11710 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 11711 | type_section.s.section = sectp; |
80626a55 DE |
11712 | type_section.size = bfd_get_section_size (sectp); |
11713 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
11714 | &type_section); | |
11715 | } | |
11716 | } | |
11717 | ||
ab5088bf | 11718 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 11719 | by PER_CU. This is for the non-DWP case. |
80626a55 | 11720 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
11721 | |
11722 | static struct dwo_file * | |
0ac5b59e DE |
11723 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
11724 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
11725 | { |
11726 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 11727 | struct dwo_file *dwo_file; |
3019eac3 DE |
11728 | struct cleanup *cleanups; |
11729 | ||
192b62ce | 11730 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
11731 | if (dbfd == NULL) |
11732 | { | |
b4f54984 | 11733 | if (dwarf_read_debug) |
80626a55 DE |
11734 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
11735 | return NULL; | |
11736 | } | |
11737 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
11738 | dwo_file->dwo_name = dwo_name; |
11739 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 11740 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
11741 | |
11742 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
11743 | ||
192b62ce TT |
11744 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
11745 | &dwo_file->sections); | |
3019eac3 | 11746 | |
33c5cd75 | 11747 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 11748 | |
78d4d2c5 JK |
11749 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
11750 | dwo_file->tus); | |
3019eac3 DE |
11751 | |
11752 | discard_cleanups (cleanups); | |
11753 | ||
b4f54984 | 11754 | if (dwarf_read_debug) |
80626a55 DE |
11755 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
11756 | ||
3019eac3 DE |
11757 | return dwo_file; |
11758 | } | |
11759 | ||
80626a55 | 11760 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
11761 | size of each of the DWP debugging sections common to version 1 and 2 that |
11762 | we are interested in. */ | |
3019eac3 | 11763 | |
80626a55 | 11764 | static void |
73869dc2 DE |
11765 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
11766 | void *dwp_file_ptr) | |
3019eac3 | 11767 | { |
9a3c8263 | 11768 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
11769 | const struct dwop_section_names *names = &dwop_section_names; |
11770 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 11771 | |
80626a55 | 11772 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 11773 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
11774 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
11775 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 11776 | |
80626a55 DE |
11777 | /* Look for specific sections that we need. */ |
11778 | if (section_is_p (sectp->name, &names->str_dwo)) | |
11779 | { | |
049412e3 | 11780 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
11781 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
11782 | } | |
11783 | else if (section_is_p (sectp->name, &names->cu_index)) | |
11784 | { | |
049412e3 | 11785 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
11786 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
11787 | } | |
11788 | else if (section_is_p (sectp->name, &names->tu_index)) | |
11789 | { | |
049412e3 | 11790 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
11791 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
11792 | } | |
11793 | } | |
3019eac3 | 11794 | |
73869dc2 DE |
11795 | /* This function is mapped across the sections and remembers the offset and |
11796 | size of each of the DWP version 2 debugging sections that we are interested | |
11797 | in. This is split into a separate function because we don't know if we | |
11798 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
11799 | ||
11800 | static void | |
11801 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
11802 | { | |
9a3c8263 | 11803 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
11804 | const struct dwop_section_names *names = &dwop_section_names; |
11805 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
11806 | ||
11807 | /* Record the ELF section number for later lookup: this is what the | |
11808 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
11809 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
11810 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
11811 | ||
11812 | /* Look for specific sections that we need. */ | |
11813 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11814 | { | |
049412e3 | 11815 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
11816 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
11817 | } | |
11818 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11819 | { | |
049412e3 | 11820 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
11821 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
11822 | } | |
11823 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11824 | { | |
049412e3 | 11825 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11826 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11827 | } | |
11828 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11829 | { | |
049412e3 | 11830 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11831 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11832 | } | |
11833 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11834 | { | |
049412e3 | 11835 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11836 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11837 | } | |
11838 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11839 | { | |
049412e3 | 11840 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11841 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11842 | } | |
11843 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11844 | { | |
049412e3 | 11845 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11846 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11847 | } | |
11848 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11849 | { | |
049412e3 | 11850 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11851 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11852 | } | |
11853 | } | |
11854 | ||
80626a55 | 11855 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11856 | |
80626a55 DE |
11857 | static hashval_t |
11858 | hash_dwp_loaded_cutus (const void *item) | |
11859 | { | |
9a3c8263 | 11860 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11861 | |
80626a55 DE |
11862 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11863 | return dwo_unit->signature; | |
3019eac3 DE |
11864 | } |
11865 | ||
80626a55 | 11866 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11867 | |
80626a55 DE |
11868 | static int |
11869 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11870 | { |
9a3c8263 SM |
11871 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11872 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11873 | |
80626a55 DE |
11874 | return dua->signature == dub->signature; |
11875 | } | |
3019eac3 | 11876 | |
80626a55 | 11877 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11878 | |
80626a55 DE |
11879 | static htab_t |
11880 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11881 | { | |
11882 | return htab_create_alloc_ex (3, | |
11883 | hash_dwp_loaded_cutus, | |
11884 | eq_dwp_loaded_cutus, | |
11885 | NULL, | |
11886 | &objfile->objfile_obstack, | |
11887 | hashtab_obstack_allocate, | |
11888 | dummy_obstack_deallocate); | |
11889 | } | |
3019eac3 | 11890 | |
ab5088bf DE |
11891 | /* Try to open DWP file FILE_NAME. |
11892 | The result is the bfd handle of the file. | |
11893 | If there is a problem finding or opening the file, return NULL. | |
11894 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11895 | same as symfile_bfd_open. */ | |
11896 | ||
192b62ce | 11897 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11898 | open_dwp_file (const char *file_name) |
11899 | { | |
192b62ce TT |
11900 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11901 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11902 | if (abfd != NULL) |
11903 | return abfd; | |
11904 | ||
11905 | /* Work around upstream bug 15652. | |
11906 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11907 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11908 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11909 | of the executable's path may have discarded the needed info. | |
11910 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11911 | .gnu_debuglink, but that doesn't exist yet.] | |
11912 | Strip the directory from FILE_NAME and search again. */ | |
11913 | if (*debug_file_directory != '\0') | |
11914 | { | |
11915 | /* Don't implicitly search the current directory here. | |
11916 | If the user wants to search "." to handle this case, | |
11917 | it must be added to debug-file-directory. */ | |
11918 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11919 | 0 /*search_cwd*/); | |
11920 | } | |
11921 | ||
11922 | return NULL; | |
ab5088bf DE |
11923 | } |
11924 | ||
80626a55 DE |
11925 | /* Initialize the use of the DWP file for the current objfile. |
11926 | By convention the name of the DWP file is ${objfile}.dwp. | |
11927 | The result is NULL if it can't be found. */ | |
a766d390 | 11928 | |
80626a55 | 11929 | static struct dwp_file * |
ab5088bf | 11930 | open_and_init_dwp_file (void) |
80626a55 DE |
11931 | { |
11932 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11933 | struct dwp_file *dwp_file; | |
80626a55 | 11934 | |
82bf32bc JK |
11935 | /* Try to find first .dwp for the binary file before any symbolic links |
11936 | resolving. */ | |
6c447423 DE |
11937 | |
11938 | /* If the objfile is a debug file, find the name of the real binary | |
11939 | file and get the name of dwp file from there. */ | |
d721ba37 | 11940 | std::string dwp_name; |
6c447423 DE |
11941 | if (objfile->separate_debug_objfile_backlink != NULL) |
11942 | { | |
11943 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11944 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11945 | |
d721ba37 | 11946 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11947 | } |
11948 | else | |
d721ba37 PA |
11949 | dwp_name = objfile->original_name; |
11950 | ||
11951 | dwp_name += ".dwp"; | |
80626a55 | 11952 | |
d721ba37 | 11953 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
11954 | if (dbfd == NULL |
11955 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
11956 | { | |
11957 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
11958 | dwp_name = objfile_name (objfile); |
11959 | dwp_name += ".dwp"; | |
11960 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
11961 | } |
11962 | ||
80626a55 DE |
11963 | if (dbfd == NULL) |
11964 | { | |
b4f54984 | 11965 | if (dwarf_read_debug) |
d721ba37 | 11966 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 11967 | return NULL; |
3019eac3 | 11968 | } |
80626a55 | 11969 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
11970 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
11971 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 11972 | |
80626a55 | 11973 | /* +1: section 0 is unused */ |
192b62ce | 11974 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
11975 | dwp_file->elf_sections = |
11976 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
11977 | dwp_file->num_sections, asection *); | |
11978 | ||
192b62ce TT |
11979 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
11980 | dwp_file); | |
80626a55 DE |
11981 | |
11982 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
11983 | ||
11984 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
11985 | ||
73869dc2 | 11986 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
11987 | if (dwp_file->cus && dwp_file->tus |
11988 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
11989 | { |
11990 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 11991 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 11992 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
11993 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
11994 | " TU version %s [in DWP file %s]"), | |
11995 | pulongest (dwp_file->cus->version), | |
d721ba37 | 11996 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 11997 | } |
08302ed2 DE |
11998 | |
11999 | if (dwp_file->cus) | |
12000 | dwp_file->version = dwp_file->cus->version; | |
12001 | else if (dwp_file->tus) | |
12002 | dwp_file->version = dwp_file->tus->version; | |
12003 | else | |
12004 | dwp_file->version = 2; | |
73869dc2 DE |
12005 | |
12006 | if (dwp_file->version == 2) | |
192b62ce TT |
12007 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
12008 | dwp_file); | |
73869dc2 | 12009 | |
19ac8c2e DE |
12010 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
12011 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 12012 | |
b4f54984 | 12013 | if (dwarf_read_debug) |
80626a55 DE |
12014 | { |
12015 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
12016 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
12017 | " %s CUs, %s TUs\n", |
12018 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12019 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12020 | } |
12021 | ||
12022 | return dwp_file; | |
3019eac3 | 12023 | } |
c906108c | 12024 | |
ab5088bf DE |
12025 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12026 | ||
12027 | static struct dwp_file * | |
12028 | get_dwp_file (void) | |
12029 | { | |
12030 | if (! dwarf2_per_objfile->dwp_checked) | |
12031 | { | |
12032 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
12033 | dwarf2_per_objfile->dwp_checked = 1; | |
12034 | } | |
12035 | return dwarf2_per_objfile->dwp_file; | |
12036 | } | |
12037 | ||
80626a55 DE |
12038 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12039 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12040 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12041 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12042 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12043 | ||
12044 | This is called, for example, when wanting to read a variable with a | |
12045 | complex location. Therefore we don't want to do file i/o for every call. | |
12046 | Therefore we don't want to look for a DWO file on every call. | |
12047 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12048 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12049 | for a DWO file. | |
12050 | ||
1c658ad5 | 12051 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12052 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12053 | |
3019eac3 | 12054 | static struct dwo_unit * |
80626a55 DE |
12055 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
12056 | const char *dwo_name, const char *comp_dir, | |
12057 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
12058 | { |
12059 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
12060 | const char *kind = is_debug_types ? "TU" : "CU"; |
12061 | void **dwo_file_slot; | |
3019eac3 | 12062 | struct dwo_file *dwo_file; |
80626a55 | 12063 | struct dwp_file *dwp_file; |
cb1df416 | 12064 | |
6a506a2d DE |
12065 | /* First see if there's a DWP file. |
12066 | If we have a DWP file but didn't find the DWO inside it, don't | |
12067 | look for the original DWO file. It makes gdb behave differently | |
12068 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12069 | |
ab5088bf | 12070 | dwp_file = get_dwp_file (); |
80626a55 | 12071 | if (dwp_file != NULL) |
cf2c3c16 | 12072 | { |
80626a55 DE |
12073 | const struct dwp_hash_table *dwp_htab = |
12074 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12075 | ||
12076 | if (dwp_htab != NULL) | |
12077 | { | |
12078 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
12079 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
12080 | signature, is_debug_types); | |
80626a55 DE |
12081 | |
12082 | if (dwo_cutu != NULL) | |
12083 | { | |
b4f54984 | 12084 | if (dwarf_read_debug) |
80626a55 DE |
12085 | { |
12086 | fprintf_unfiltered (gdb_stdlog, | |
12087 | "Virtual DWO %s %s found: @%s\n", | |
12088 | kind, hex_string (signature), | |
12089 | host_address_to_string (dwo_cutu)); | |
12090 | } | |
12091 | return dwo_cutu; | |
12092 | } | |
12093 | } | |
12094 | } | |
6a506a2d | 12095 | else |
80626a55 | 12096 | { |
6a506a2d | 12097 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12098 | |
6a506a2d DE |
12099 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
12100 | if (*dwo_file_slot == NULL) | |
80626a55 | 12101 | { |
6a506a2d DE |
12102 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
12103 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 12104 | } |
6a506a2d | 12105 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12106 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12107 | |
6a506a2d | 12108 | if (dwo_file != NULL) |
19c3d4c9 | 12109 | { |
6a506a2d DE |
12110 | struct dwo_unit *dwo_cutu = NULL; |
12111 | ||
12112 | if (is_debug_types && dwo_file->tus) | |
12113 | { | |
12114 | struct dwo_unit find_dwo_cutu; | |
12115 | ||
12116 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12117 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
12118 | dwo_cutu |
12119 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 12120 | } |
33c5cd75 | 12121 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12122 | { |
33c5cd75 DB |
12123 | struct dwo_unit find_dwo_cutu; |
12124 | ||
12125 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12126 | find_dwo_cutu.signature = signature; | |
12127 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
12128 | &find_dwo_cutu); | |
6a506a2d DE |
12129 | } |
12130 | ||
12131 | if (dwo_cutu != NULL) | |
12132 | { | |
b4f54984 | 12133 | if (dwarf_read_debug) |
6a506a2d DE |
12134 | { |
12135 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
12136 | kind, dwo_name, hex_string (signature), | |
12137 | host_address_to_string (dwo_cutu)); | |
12138 | } | |
12139 | return dwo_cutu; | |
80626a55 DE |
12140 | } |
12141 | } | |
2e276125 | 12142 | } |
9cdd5dbd | 12143 | |
80626a55 DE |
12144 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12145 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12146 | correctly to find the file. */ | |
12147 | ||
b4f54984 | 12148 | if (dwarf_read_debug) |
80626a55 DE |
12149 | { |
12150 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
12151 | kind, dwo_name, hex_string (signature)); | |
12152 | } | |
3019eac3 | 12153 | |
6656a72d DE |
12154 | /* This is a warning and not a complaint because it can be caused by |
12155 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12156 | { |
12157 | /* Print the name of the DWP file if we looked there, helps the user | |
12158 | better diagnose the problem. */ | |
791afaa2 | 12159 | std::string dwp_text; |
43942612 DE |
12160 | |
12161 | if (dwp_file != NULL) | |
791afaa2 TT |
12162 | dwp_text = string_printf (" [in DWP file %s]", |
12163 | lbasename (dwp_file->name)); | |
43942612 DE |
12164 | |
12165 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
12166 | " [in module %s]"), | |
12167 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 12168 | dwp_text.c_str (), |
43942612 | 12169 | this_unit->is_debug_types ? "TU" : "CU", |
9c541725 | 12170 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 12171 | } |
3019eac3 | 12172 | return NULL; |
5fb290d7 DJ |
12173 | } |
12174 | ||
80626a55 DE |
12175 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12176 | See lookup_dwo_cutu_unit for details. */ | |
12177 | ||
12178 | static struct dwo_unit * | |
12179 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
12180 | const char *dwo_name, const char *comp_dir, | |
12181 | ULONGEST signature) | |
12182 | { | |
12183 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
12184 | } | |
12185 | ||
12186 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12187 | See lookup_dwo_cutu_unit for details. */ | |
12188 | ||
12189 | static struct dwo_unit * | |
12190 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
12191 | const char *dwo_name, const char *comp_dir) | |
12192 | { | |
12193 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
12194 | } | |
12195 | ||
89e63ee4 DE |
12196 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12197 | ||
12198 | static int | |
12199 | queue_and_load_dwo_tu (void **slot, void *info) | |
12200 | { | |
12201 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
12202 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
12203 | ULONGEST signature = dwo_unit->signature; | |
12204 | struct signatured_type *sig_type = | |
12205 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
12206 | ||
12207 | if (sig_type != NULL) | |
12208 | { | |
12209 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
12210 | ||
12211 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
12212 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12213 | while processing PER_CU. */ | |
12214 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
12215 | load_full_type_unit (sig_cu); | |
12216 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
12217 | } | |
12218 | ||
12219 | return 1; | |
12220 | } | |
12221 | ||
12222 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
12223 | The DWO may have the only definition of the type, though it may not be | |
12224 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12225 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12226 | ||
12227 | static void | |
12228 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
12229 | { | |
12230 | struct dwo_unit *dwo_unit; | |
12231 | struct dwo_file *dwo_file; | |
12232 | ||
12233 | gdb_assert (!per_cu->is_debug_types); | |
12234 | gdb_assert (get_dwp_file () == NULL); | |
12235 | gdb_assert (per_cu->cu != NULL); | |
12236 | ||
12237 | dwo_unit = per_cu->cu->dwo_unit; | |
12238 | gdb_assert (dwo_unit != NULL); | |
12239 | ||
12240 | dwo_file = dwo_unit->dwo_file; | |
12241 | if (dwo_file->tus != NULL) | |
12242 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
12243 | } | |
12244 | ||
3019eac3 DE |
12245 | /* Free all resources associated with DWO_FILE. |
12246 | Close the DWO file and munmap the sections. | |
12247 | All memory should be on the objfile obstack. */ | |
348e048f DE |
12248 | |
12249 | static void | |
3019eac3 | 12250 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 12251 | { |
348e048f | 12252 | |
5c6fa7ab | 12253 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 12254 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 12255 | |
3019eac3 DE |
12256 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
12257 | } | |
348e048f | 12258 | |
3019eac3 | 12259 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 12260 | |
3019eac3 DE |
12261 | static void |
12262 | free_dwo_file_cleanup (void *arg) | |
12263 | { | |
12264 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
12265 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 12266 | |
3019eac3 DE |
12267 | free_dwo_file (dwo_file, objfile); |
12268 | } | |
348e048f | 12269 | |
3019eac3 | 12270 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 12271 | |
3019eac3 DE |
12272 | static int |
12273 | free_dwo_file_from_slot (void **slot, void *info) | |
12274 | { | |
12275 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
12276 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 12277 | |
3019eac3 | 12278 | free_dwo_file (dwo_file, objfile); |
348e048f | 12279 | |
3019eac3 DE |
12280 | return 1; |
12281 | } | |
348e048f | 12282 | |
3019eac3 | 12283 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 12284 | |
3019eac3 DE |
12285 | static void |
12286 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
12287 | { | |
12288 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 12289 | } |
3019eac3 DE |
12290 | \f |
12291 | /* Read in various DIEs. */ | |
348e048f | 12292 | |
d389af10 | 12293 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12294 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12295 | already referenced by DW_AT_abstract_origin from the children of the | |
12296 | current DIE. */ | |
d389af10 JK |
12297 | |
12298 | static void | |
12299 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12300 | { | |
12301 | struct die_info *child_die; | |
791afaa2 | 12302 | sect_offset *offsetp; |
d389af10 JK |
12303 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12304 | struct die_info *origin_die; | |
12305 | /* Iterator of the ORIGIN_DIE children. */ | |
12306 | struct die_info *origin_child_die; | |
d389af10 | 12307 | struct attribute *attr; |
cd02d79d PA |
12308 | struct dwarf2_cu *origin_cu; |
12309 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12310 | |
12311 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12312 | if (!attr) | |
12313 | return; | |
12314 | ||
cd02d79d PA |
12315 | /* Note that following die references may follow to a die in a |
12316 | different cu. */ | |
12317 | ||
12318 | origin_cu = cu; | |
12319 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12320 | ||
12321 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12322 | symbols in. */ | |
12323 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12324 | origin_cu->list_in_scope = cu->list_in_scope; | |
12325 | ||
edb3359d DJ |
12326 | if (die->tag != origin_die->tag |
12327 | && !(die->tag == DW_TAG_inlined_subroutine | |
12328 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12329 | complaint (&symfile_complaints, |
12330 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
12331 | to_underlying (die->sect_off), |
12332 | to_underlying (origin_die->sect_off)); | |
d389af10 | 12333 | |
791afaa2 | 12334 | std::vector<sect_offset> offsets; |
d389af10 | 12335 | |
3ea89b92 PMR |
12336 | for (child_die = die->child; |
12337 | child_die && child_die->tag; | |
12338 | child_die = sibling_die (child_die)) | |
12339 | { | |
12340 | struct die_info *child_origin_die; | |
12341 | struct dwarf2_cu *child_origin_cu; | |
12342 | ||
12343 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12344 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12345 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12346 | present in the abstract instance but not referenced in the concrete | |
12347 | one. */ | |
216f72a1 JK |
12348 | if (child_die->tag == DW_TAG_call_site |
12349 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12350 | continue; |
12351 | ||
c38f313d DJ |
12352 | /* For each CHILD_DIE, find the corresponding child of |
12353 | ORIGIN_DIE. If there is more than one layer of | |
12354 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12355 | but GCC versions at least through 4.4 generate this (GCC PR | |
12356 | 40573). */ | |
3ea89b92 PMR |
12357 | child_origin_die = child_die; |
12358 | child_origin_cu = cu; | |
c38f313d DJ |
12359 | while (1) |
12360 | { | |
cd02d79d PA |
12361 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12362 | child_origin_cu); | |
c38f313d DJ |
12363 | if (attr == NULL) |
12364 | break; | |
cd02d79d PA |
12365 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12366 | &child_origin_cu); | |
c38f313d DJ |
12367 | } |
12368 | ||
d389af10 JK |
12369 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12370 | counterpart may exist. */ | |
c38f313d | 12371 | if (child_origin_die != child_die) |
d389af10 | 12372 | { |
edb3359d DJ |
12373 | if (child_die->tag != child_origin_die->tag |
12374 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12375 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12376 | complaint (&symfile_complaints, |
12377 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12378 | "different tags"), |
12379 | to_underlying (child_die->sect_off), | |
12380 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
12381 | if (child_origin_die->parent != origin_die) |
12382 | complaint (&symfile_complaints, | |
12383 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12384 | "different parents"), |
12385 | to_underlying (child_die->sect_off), | |
12386 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 12387 | else |
791afaa2 | 12388 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12389 | } |
d389af10 | 12390 | } |
791afaa2 TT |
12391 | std::sort (offsets.begin (), offsets.end ()); |
12392 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12393 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12394 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
12395 | complaint (&symfile_complaints, |
12396 | _("Multiple children of DIE 0x%x refer " | |
12397 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 12398 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 | 12399 | |
791afaa2 | 12400 | offsetp = offsets.data (); |
d389af10 JK |
12401 | origin_child_die = origin_die->child; |
12402 | while (origin_child_die && origin_child_die->tag) | |
12403 | { | |
12404 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12405 | while (offsetp < offsets_end |
9c541725 | 12406 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12407 | offsetp++; |
b64f50a1 | 12408 | if (offsetp >= offsets_end |
9c541725 | 12409 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12410 | { |
adde2bff DE |
12411 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12412 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12413 | This can happen with mutually referenced abstract_origins. | |
12414 | PR 16581. */ | |
12415 | if (!origin_child_die->in_process) | |
12416 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12417 | } |
12418 | origin_child_die = sibling_die (origin_child_die); | |
12419 | } | |
cd02d79d | 12420 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
12421 | } |
12422 | ||
c906108c | 12423 | static void |
e7c27a73 | 12424 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12425 | { |
e7c27a73 | 12426 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12427 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12428 | struct context_stack *newobj; |
c906108c SS |
12429 | CORE_ADDR lowpc; |
12430 | CORE_ADDR highpc; | |
12431 | struct die_info *child_die; | |
edb3359d | 12432 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12433 | const char *name; |
e142c38c | 12434 | CORE_ADDR baseaddr; |
801e3a5b | 12435 | struct block *block; |
edb3359d | 12436 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12437 | std::vector<struct symbol *> template_args; |
34eaf542 | 12438 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12439 | |
12440 | if (inlined_func) | |
12441 | { | |
12442 | /* If we do not have call site information, we can't show the | |
12443 | caller of this inlined function. That's too confusing, so | |
12444 | only use the scope for local variables. */ | |
12445 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12446 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12447 | if (call_line == NULL || call_file == NULL) | |
12448 | { | |
12449 | read_lexical_block_scope (die, cu); | |
12450 | return; | |
12451 | } | |
12452 | } | |
c906108c | 12453 | |
e142c38c DJ |
12454 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
12455 | ||
94af9270 | 12456 | name = dwarf2_name (die, cu); |
c906108c | 12457 | |
e8d05480 JB |
12458 | /* Ignore functions with missing or empty names. These are actually |
12459 | illegal according to the DWARF standard. */ | |
12460 | if (name == NULL) | |
12461 | { | |
12462 | complaint (&symfile_complaints, | |
b64f50a1 | 12463 | _("missing name for subprogram DIE at %d"), |
9c541725 | 12464 | to_underlying (die->sect_off)); |
e8d05480 JB |
12465 | return; |
12466 | } | |
12467 | ||
12468 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12469 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12470 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12471 | { |
ae4d0c03 PM |
12472 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12473 | if (!attr || !DW_UNSND (attr)) | |
12474 | complaint (&symfile_complaints, | |
3e43a32a MS |
12475 | _("cannot get low and high bounds " |
12476 | "for subprogram DIE at %d"), | |
9c541725 | 12477 | to_underlying (die->sect_off)); |
e8d05480 JB |
12478 | return; |
12479 | } | |
c906108c | 12480 | |
3e29f34a MR |
12481 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12482 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12483 | |
34eaf542 TT |
12484 | /* If we have any template arguments, then we must allocate a |
12485 | different sort of symbol. */ | |
12486 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12487 | { | |
12488 | if (child_die->tag == DW_TAG_template_type_param | |
12489 | || child_die->tag == DW_TAG_template_value_param) | |
12490 | { | |
e623cf5d | 12491 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 12492 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12493 | break; |
12494 | } | |
12495 | } | |
12496 | ||
fe978cb0 PA |
12497 | newobj = push_context (0, lowpc); |
12498 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 12499 | (struct symbol *) templ_func); |
4c2df51b | 12500 | |
4cecd739 DJ |
12501 | /* If there is a location expression for DW_AT_frame_base, record |
12502 | it. */ | |
e142c38c | 12503 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 12504 | if (attr) |
fe978cb0 | 12505 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12506 | |
63e43d3a PMR |
12507 | /* If there is a location for the static link, record it. */ |
12508 | newobj->static_link = NULL; | |
12509 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
12510 | if (attr) | |
12511 | { | |
224c3ddb SM |
12512 | newobj->static_link |
12513 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
12514 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
12515 | } | |
12516 | ||
e142c38c | 12517 | cu->list_in_scope = &local_symbols; |
c906108c | 12518 | |
639d11d3 | 12519 | if (die->child != NULL) |
c906108c | 12520 | { |
639d11d3 | 12521 | child_die = die->child; |
c906108c SS |
12522 | while (child_die && child_die->tag) |
12523 | { | |
34eaf542 TT |
12524 | if (child_die->tag == DW_TAG_template_type_param |
12525 | || child_die->tag == DW_TAG_template_value_param) | |
12526 | { | |
12527 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12528 | ||
f1078f66 | 12529 | if (arg != NULL) |
2f4732b0 | 12530 | template_args.push_back (arg); |
34eaf542 TT |
12531 | } |
12532 | else | |
12533 | process_die (child_die, cu); | |
c906108c SS |
12534 | child_die = sibling_die (child_die); |
12535 | } | |
12536 | } | |
12537 | ||
d389af10 JK |
12538 | inherit_abstract_dies (die, cu); |
12539 | ||
4a811a97 UW |
12540 | /* If we have a DW_AT_specification, we might need to import using |
12541 | directives from the context of the specification DIE. See the | |
12542 | comment in determine_prefix. */ | |
12543 | if (cu->language == language_cplus | |
12544 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12545 | { | |
12546 | struct dwarf2_cu *spec_cu = cu; | |
12547 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12548 | ||
12549 | while (spec_die) | |
12550 | { | |
12551 | child_die = spec_die->child; | |
12552 | while (child_die && child_die->tag) | |
12553 | { | |
12554 | if (child_die->tag == DW_TAG_imported_module) | |
12555 | process_die (child_die, spec_cu); | |
12556 | child_die = sibling_die (child_die); | |
12557 | } | |
12558 | ||
12559 | /* In some cases, GCC generates specification DIEs that | |
12560 | themselves contain DW_AT_specification attributes. */ | |
12561 | spec_die = die_specification (spec_die, &spec_cu); | |
12562 | } | |
12563 | } | |
12564 | ||
fe978cb0 | 12565 | newobj = pop_context (); |
c906108c | 12566 | /* Make a block for the local symbols within. */ |
fe978cb0 | 12567 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 12568 | newobj->static_link, lowpc, highpc); |
801e3a5b | 12569 | |
df8a16a1 | 12570 | /* For C++, set the block's scope. */ |
45280282 IB |
12571 | if ((cu->language == language_cplus |
12572 | || cu->language == language_fortran | |
c44af4eb TT |
12573 | || cu->language == language_d |
12574 | || cu->language == language_rust) | |
4d4ec4e5 | 12575 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12576 | block_set_scope (block, determine_prefix (die, cu), |
12577 | &objfile->objfile_obstack); | |
df8a16a1 | 12578 | |
801e3a5b JB |
12579 | /* If we have address ranges, record them. */ |
12580 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12581 | |
fe978cb0 | 12582 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 12583 | |
34eaf542 | 12584 | /* Attach template arguments to function. */ |
2f4732b0 | 12585 | if (!template_args.empty ()) |
34eaf542 TT |
12586 | { |
12587 | gdb_assert (templ_func != NULL); | |
12588 | ||
2f4732b0 | 12589 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 12590 | templ_func->template_arguments |
8d749320 SM |
12591 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
12592 | templ_func->n_template_arguments); | |
34eaf542 | 12593 | memcpy (templ_func->template_arguments, |
2f4732b0 | 12594 | template_args.data (), |
34eaf542 | 12595 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
34eaf542 TT |
12596 | } |
12597 | ||
208d8187 JB |
12598 | /* In C++, we can have functions nested inside functions (e.g., when |
12599 | a function declares a class that has methods). This means that | |
12600 | when we finish processing a function scope, we may need to go | |
12601 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 12602 | local_symbols = newobj->locals; |
22cee43f | 12603 | local_using_directives = newobj->local_using_directives; |
208d8187 | 12604 | |
921e78cf JB |
12605 | /* If we've finished processing a top-level function, subsequent |
12606 | symbols go in the file symbol list. */ | |
12607 | if (outermost_context_p ()) | |
e142c38c | 12608 | cu->list_in_scope = &file_symbols; |
c906108c SS |
12609 | } |
12610 | ||
12611 | /* Process all the DIES contained within a lexical block scope. Start | |
12612 | a new scope, process the dies, and then close the scope. */ | |
12613 | ||
12614 | static void | |
e7c27a73 | 12615 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12616 | { |
e7c27a73 | 12617 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12618 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12619 | struct context_stack *newobj; |
c906108c SS |
12620 | CORE_ADDR lowpc, highpc; |
12621 | struct die_info *child_die; | |
e142c38c DJ |
12622 | CORE_ADDR baseaddr; |
12623 | ||
12624 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
12625 | |
12626 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
12627 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
12628 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 12629 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 12630 | describe ranges. */ |
e385593e JK |
12631 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
12632 | { | |
12633 | case PC_BOUNDS_NOT_PRESENT: | |
12634 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
12635 | there was no wrapping by that DW_TAG_lexical_block. | |
12636 | GCC does no longer produces such DWARF since GCC r224161. */ | |
12637 | for (child_die = die->child; | |
12638 | child_die != NULL && child_die->tag; | |
12639 | child_die = sibling_die (child_die)) | |
12640 | process_die (child_die, cu); | |
12641 | return; | |
12642 | case PC_BOUNDS_INVALID: | |
12643 | return; | |
12644 | } | |
3e29f34a MR |
12645 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12646 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
12647 | |
12648 | push_context (0, lowpc); | |
639d11d3 | 12649 | if (die->child != NULL) |
c906108c | 12650 | { |
639d11d3 | 12651 | child_die = die->child; |
c906108c SS |
12652 | while (child_die && child_die->tag) |
12653 | { | |
e7c27a73 | 12654 | process_die (child_die, cu); |
c906108c SS |
12655 | child_die = sibling_die (child_die); |
12656 | } | |
12657 | } | |
3ea89b92 | 12658 | inherit_abstract_dies (die, cu); |
fe978cb0 | 12659 | newobj = pop_context (); |
c906108c | 12660 | |
22cee43f | 12661 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 12662 | { |
801e3a5b | 12663 | struct block *block |
63e43d3a | 12664 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 12665 | newobj->start_addr, highpc); |
801e3a5b JB |
12666 | |
12667 | /* Note that recording ranges after traversing children, as we | |
12668 | do here, means that recording a parent's ranges entails | |
12669 | walking across all its children's ranges as they appear in | |
12670 | the address map, which is quadratic behavior. | |
12671 | ||
12672 | It would be nicer to record the parent's ranges before | |
12673 | traversing its children, simply overriding whatever you find | |
12674 | there. But since we don't even decide whether to create a | |
12675 | block until after we've traversed its children, that's hard | |
12676 | to do. */ | |
12677 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 12678 | } |
fe978cb0 | 12679 | local_symbols = newobj->locals; |
22cee43f | 12680 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
12681 | } |
12682 | ||
216f72a1 | 12683 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
12684 | |
12685 | static void | |
12686 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12687 | { | |
12688 | struct objfile *objfile = cu->objfile; | |
12689 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12690 | CORE_ADDR pc, baseaddr; | |
12691 | struct attribute *attr; | |
12692 | struct call_site *call_site, call_site_local; | |
12693 | void **slot; | |
12694 | int nparams; | |
12695 | struct die_info *child_die; | |
12696 | ||
12697 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12698 | ||
216f72a1 JK |
12699 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
12700 | if (attr == NULL) | |
12701 | { | |
12702 | /* This was a pre-DWARF-5 GNU extension alias | |
12703 | for DW_AT_call_return_pc. */ | |
12704 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
12705 | } | |
96408a79 SA |
12706 | if (!attr) |
12707 | { | |
12708 | complaint (&symfile_complaints, | |
216f72a1 | 12709 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 12710 | "DIE 0x%x [in module %s]"), |
9c541725 | 12711 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12712 | return; |
12713 | } | |
31aa7e4e | 12714 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 12715 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
12716 | |
12717 | if (cu->call_site_htab == NULL) | |
12718 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
12719 | NULL, &objfile->objfile_obstack, | |
12720 | hashtab_obstack_allocate, NULL); | |
12721 | call_site_local.pc = pc; | |
12722 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
12723 | if (*slot != NULL) | |
12724 | { | |
12725 | complaint (&symfile_complaints, | |
216f72a1 | 12726 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 12727 | "DIE 0x%x [in module %s]"), |
9c541725 | 12728 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 12729 | objfile_name (objfile)); |
96408a79 SA |
12730 | return; |
12731 | } | |
12732 | ||
12733 | /* Count parameters at the caller. */ | |
12734 | ||
12735 | nparams = 0; | |
12736 | for (child_die = die->child; child_die && child_die->tag; | |
12737 | child_die = sibling_die (child_die)) | |
12738 | { | |
216f72a1 JK |
12739 | if (child_die->tag != DW_TAG_call_site_parameter |
12740 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12741 | { |
12742 | complaint (&symfile_complaints, | |
216f72a1 JK |
12743 | _("Tag %d is not DW_TAG_call_site_parameter in " |
12744 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 12745 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 12746 | objfile_name (objfile)); |
96408a79 SA |
12747 | continue; |
12748 | } | |
12749 | ||
12750 | nparams++; | |
12751 | } | |
12752 | ||
224c3ddb SM |
12753 | call_site |
12754 | = ((struct call_site *) | |
12755 | obstack_alloc (&objfile->objfile_obstack, | |
12756 | sizeof (*call_site) | |
12757 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
12758 | *slot = call_site; |
12759 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
12760 | call_site->pc = pc; | |
12761 | ||
216f72a1 JK |
12762 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
12763 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
12764 | { |
12765 | struct die_info *func_die; | |
12766 | ||
12767 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
12768 | for (func_die = die->parent; | |
12769 | func_die && func_die->tag != DW_TAG_subprogram | |
12770 | && func_die->tag != DW_TAG_subroutine_type; | |
12771 | func_die = func_die->parent); | |
12772 | ||
216f72a1 JK |
12773 | /* DW_AT_call_all_calls is a superset |
12774 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 12775 | if (func_die |
216f72a1 | 12776 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 12777 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 12778 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
12779 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
12780 | { | |
12781 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
12782 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
12783 | both the initial caller containing the real return address PC and | |
12784 | the final callee containing the current PC of a chain of tail | |
12785 | calls do not need to have the tail call list complete. But any | |
12786 | function candidate for a virtual tail call frame searched via | |
12787 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
12788 | determined unambiguously. */ | |
12789 | } | |
12790 | else | |
12791 | { | |
12792 | struct type *func_type = NULL; | |
12793 | ||
12794 | if (func_die) | |
12795 | func_type = get_die_type (func_die, cu); | |
12796 | if (func_type != NULL) | |
12797 | { | |
12798 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
12799 | ||
12800 | /* Enlist this call site to the function. */ | |
12801 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
12802 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
12803 | } | |
12804 | else | |
12805 | complaint (&symfile_complaints, | |
216f72a1 | 12806 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 12807 | "DIE 0x%x [in module %s]"), |
9c541725 | 12808 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12809 | } |
12810 | } | |
12811 | ||
216f72a1 JK |
12812 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
12813 | if (attr == NULL) | |
12814 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
12815 | if (attr == NULL) | |
12816 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 12817 | if (attr == NULL) |
216f72a1 JK |
12818 | { |
12819 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
12820 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12821 | } | |
96408a79 SA |
12822 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12823 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12824 | /* Keep NULL DWARF_BLOCK. */; | |
12825 | else if (attr_form_is_block (attr)) | |
12826 | { | |
12827 | struct dwarf2_locexpr_baton *dlbaton; | |
12828 | ||
8d749320 | 12829 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12830 | dlbaton->data = DW_BLOCK (attr)->data; |
12831 | dlbaton->size = DW_BLOCK (attr)->size; | |
12832 | dlbaton->per_cu = cu->per_cu; | |
12833 | ||
12834 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12835 | } | |
7771576e | 12836 | else if (attr_form_is_ref (attr)) |
96408a79 | 12837 | { |
96408a79 SA |
12838 | struct dwarf2_cu *target_cu = cu; |
12839 | struct die_info *target_die; | |
12840 | ||
ac9ec31b | 12841 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12842 | gdb_assert (target_cu->objfile == objfile); |
12843 | if (die_is_declaration (target_die, target_cu)) | |
12844 | { | |
7d45c7c3 | 12845 | const char *target_physname; |
9112db09 JK |
12846 | |
12847 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12848 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12849 | if (target_physname == NULL) |
9112db09 | 12850 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12851 | if (target_physname == NULL) |
12852 | complaint (&symfile_complaints, | |
216f72a1 | 12853 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12854 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12855 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12856 | else |
7d455152 | 12857 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12858 | } |
12859 | else | |
12860 | { | |
12861 | CORE_ADDR lowpc; | |
12862 | ||
12863 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12864 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12865 | <= PC_BOUNDS_INVALID) |
96408a79 | 12866 | complaint (&symfile_complaints, |
216f72a1 | 12867 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12868 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12869 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12870 | else |
3e29f34a MR |
12871 | { |
12872 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12873 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12874 | } | |
96408a79 SA |
12875 | } |
12876 | } | |
12877 | else | |
12878 | complaint (&symfile_complaints, | |
216f72a1 | 12879 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12880 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12881 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12882 | |
12883 | call_site->per_cu = cu->per_cu; | |
12884 | ||
12885 | for (child_die = die->child; | |
12886 | child_die && child_die->tag; | |
12887 | child_die = sibling_die (child_die)) | |
12888 | { | |
96408a79 | 12889 | struct call_site_parameter *parameter; |
1788b2d3 | 12890 | struct attribute *loc, *origin; |
96408a79 | 12891 | |
216f72a1 JK |
12892 | if (child_die->tag != DW_TAG_call_site_parameter |
12893 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12894 | { |
12895 | /* Already printed the complaint above. */ | |
12896 | continue; | |
12897 | } | |
12898 | ||
12899 | gdb_assert (call_site->parameter_count < nparams); | |
12900 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12901 | ||
1788b2d3 JK |
12902 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12903 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12904 | register is contained in DW_AT_call_value. */ |
96408a79 | 12905 | |
24c5c679 | 12906 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12907 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12908 | if (origin == NULL) | |
12909 | { | |
12910 | /* This was a pre-DWARF-5 GNU extension alias | |
12911 | for DW_AT_call_parameter. */ | |
12912 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12913 | } | |
7771576e | 12914 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12915 | { |
1788b2d3 | 12916 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12917 | |
12918 | sect_offset sect_off | |
12919 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12920 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12921 | { |
12922 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12923 | binding can be done only inside one CU. Such referenced DIE | |
12924 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12925 | complaint (&symfile_complaints, | |
216f72a1 JK |
12926 | _("DW_AT_call_parameter offset is not in CU for " |
12927 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12928 | to_underlying (child_die->sect_off), |
12929 | objfile_name (objfile)); | |
d76b7dbc JK |
12930 | continue; |
12931 | } | |
9c541725 PA |
12932 | parameter->u.param_cu_off |
12933 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12934 | } |
12935 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12936 | { |
12937 | complaint (&symfile_complaints, | |
12938 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12939 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12940 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12941 | continue; |
12942 | } | |
24c5c679 | 12943 | else |
96408a79 | 12944 | { |
24c5c679 JK |
12945 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12946 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12947 | if (parameter->u.dwarf_reg != -1) | |
12948 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
12949 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
12950 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
12951 | ¶meter->u.fb_offset)) | |
12952 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
12953 | else | |
12954 | { | |
12955 | complaint (&symfile_complaints, | |
12956 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
12957 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 12958 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 12959 | "[in module %s]"), |
9c541725 PA |
12960 | to_underlying (child_die->sect_off), |
12961 | objfile_name (objfile)); | |
24c5c679 JK |
12962 | continue; |
12963 | } | |
96408a79 SA |
12964 | } |
12965 | ||
216f72a1 JK |
12966 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
12967 | if (attr == NULL) | |
12968 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
12969 | if (!attr_form_is_block (attr)) |
12970 | { | |
12971 | complaint (&symfile_complaints, | |
216f72a1 JK |
12972 | _("No DW_FORM_block* DW_AT_call_value for " |
12973 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12974 | to_underlying (child_die->sect_off), |
12975 | objfile_name (objfile)); | |
96408a79 SA |
12976 | continue; |
12977 | } | |
12978 | parameter->value = DW_BLOCK (attr)->data; | |
12979 | parameter->value_size = DW_BLOCK (attr)->size; | |
12980 | ||
12981 | /* Parameters are not pre-cleared by memset above. */ | |
12982 | parameter->data_value = NULL; | |
12983 | parameter->data_value_size = 0; | |
12984 | call_site->parameter_count++; | |
12985 | ||
216f72a1 JK |
12986 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
12987 | if (attr == NULL) | |
12988 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
12989 | if (attr) |
12990 | { | |
12991 | if (!attr_form_is_block (attr)) | |
12992 | complaint (&symfile_complaints, | |
216f72a1 JK |
12993 | _("No DW_FORM_block* DW_AT_call_data_value for " |
12994 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12995 | to_underlying (child_die->sect_off), |
12996 | objfile_name (objfile)); | |
96408a79 SA |
12997 | else |
12998 | { | |
12999 | parameter->data_value = DW_BLOCK (attr)->data; | |
13000 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
13001 | } | |
13002 | } | |
13003 | } | |
13004 | } | |
13005 | ||
71a3c369 TT |
13006 | /* Helper function for read_variable. If DIE represents a virtual |
13007 | table, then return the type of the concrete object that is | |
13008 | associated with the virtual table. Otherwise, return NULL. */ | |
13009 | ||
13010 | static struct type * | |
13011 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13012 | { | |
13013 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13014 | if (attr == NULL) | |
13015 | return NULL; | |
13016 | ||
13017 | /* Find the type DIE. */ | |
13018 | struct die_info *type_die = NULL; | |
13019 | struct dwarf2_cu *type_cu = cu; | |
13020 | ||
13021 | if (attr_form_is_ref (attr)) | |
13022 | type_die = follow_die_ref (die, attr, &type_cu); | |
13023 | if (type_die == NULL) | |
13024 | return NULL; | |
13025 | ||
13026 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13027 | return NULL; | |
13028 | return die_containing_type (type_die, type_cu); | |
13029 | } | |
13030 | ||
13031 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13032 | ||
13033 | static void | |
13034 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13035 | { | |
13036 | struct rust_vtable_symbol *storage = NULL; | |
13037 | ||
13038 | if (cu->language == language_rust) | |
13039 | { | |
13040 | struct type *containing_type = rust_containing_type (die, cu); | |
13041 | ||
13042 | if (containing_type != NULL) | |
13043 | { | |
13044 | struct objfile *objfile = cu->objfile; | |
13045 | ||
13046 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
13047 | struct rust_vtable_symbol); | |
13048 | initialize_objfile_symbol (storage); | |
13049 | storage->concrete_type = containing_type; | |
cf724bc9 | 13050 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13051 | } |
13052 | } | |
13053 | ||
13054 | new_symbol_full (die, NULL, cu, storage); | |
13055 | } | |
13056 | ||
43988095 JK |
13057 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13058 | reading .debug_rnglists. | |
13059 | Callback's type should be: | |
13060 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13061 | Return true if the attributes are present and valid, otherwise, | |
13062 | return false. */ | |
13063 | ||
13064 | template <typename Callback> | |
13065 | static bool | |
13066 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
13067 | Callback &&callback) | |
13068 | { | |
13069 | struct objfile *objfile = cu->objfile; | |
13070 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13071 | struct comp_unit_head *cu_header = &cu->header; | |
13072 | bfd *obfd = objfile->obfd; | |
13073 | unsigned int addr_size = cu_header->addr_size; | |
13074 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13075 | /* Base address selection entry. */ | |
13076 | CORE_ADDR base; | |
13077 | int found_base; | |
13078 | unsigned int dummy; | |
13079 | const gdb_byte *buffer; | |
13080 | CORE_ADDR low = 0; | |
13081 | CORE_ADDR high = 0; | |
13082 | CORE_ADDR baseaddr; | |
13083 | bool overflow = false; | |
13084 | ||
13085 | found_base = cu->base_known; | |
13086 | base = cu->base_address; | |
13087 | ||
13088 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
13089 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
13090 | { | |
13091 | complaint (&symfile_complaints, | |
13092 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
13093 | offset); | |
13094 | return false; | |
13095 | } | |
13096 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
13097 | ||
13098 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
13099 | ||
13100 | while (1) | |
13101 | { | |
7814882a JK |
13102 | /* Initialize it due to a false compiler warning. */ |
13103 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
13104 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
13105 | + dwarf2_per_objfile->rnglists.size); | |
13106 | unsigned int bytes_read; | |
13107 | ||
13108 | if (buffer == buf_end) | |
13109 | { | |
13110 | overflow = true; | |
13111 | break; | |
13112 | } | |
13113 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13114 | switch (rlet) | |
13115 | { | |
13116 | case DW_RLE_end_of_list: | |
13117 | break; | |
13118 | case DW_RLE_base_address: | |
13119 | if (buffer + cu->header.addr_size > buf_end) | |
13120 | { | |
13121 | overflow = true; | |
13122 | break; | |
13123 | } | |
13124 | base = read_address (obfd, buffer, cu, &bytes_read); | |
13125 | found_base = 1; | |
13126 | buffer += bytes_read; | |
13127 | break; | |
13128 | case DW_RLE_start_length: | |
13129 | if (buffer + cu->header.addr_size > buf_end) | |
13130 | { | |
13131 | overflow = true; | |
13132 | break; | |
13133 | } | |
13134 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
13135 | buffer += bytes_read; | |
13136 | range_end = (range_beginning | |
13137 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13138 | buffer += bytes_read; | |
13139 | if (buffer > buf_end) | |
13140 | { | |
13141 | overflow = true; | |
13142 | break; | |
13143 | } | |
13144 | break; | |
13145 | case DW_RLE_offset_pair: | |
13146 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13147 | buffer += bytes_read; | |
13148 | if (buffer > buf_end) | |
13149 | { | |
13150 | overflow = true; | |
13151 | break; | |
13152 | } | |
13153 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13154 | buffer += bytes_read; | |
13155 | if (buffer > buf_end) | |
13156 | { | |
13157 | overflow = true; | |
13158 | break; | |
13159 | } | |
13160 | break; | |
13161 | case DW_RLE_start_end: | |
13162 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13163 | { | |
13164 | overflow = true; | |
13165 | break; | |
13166 | } | |
13167 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
13168 | buffer += bytes_read; | |
13169 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
13170 | buffer += bytes_read; | |
13171 | break; | |
13172 | default: | |
13173 | complaint (&symfile_complaints, | |
13174 | _("Invalid .debug_rnglists data (no base address)")); | |
13175 | return false; | |
13176 | } | |
13177 | if (rlet == DW_RLE_end_of_list || overflow) | |
13178 | break; | |
13179 | if (rlet == DW_RLE_base_address) | |
13180 | continue; | |
13181 | ||
13182 | if (!found_base) | |
13183 | { | |
13184 | /* We have no valid base address for the ranges | |
13185 | data. */ | |
13186 | complaint (&symfile_complaints, | |
13187 | _("Invalid .debug_rnglists data (no base address)")); | |
13188 | return false; | |
13189 | } | |
13190 | ||
13191 | if (range_beginning > range_end) | |
13192 | { | |
13193 | /* Inverted range entries are invalid. */ | |
13194 | complaint (&symfile_complaints, | |
13195 | _("Invalid .debug_rnglists data (inverted range)")); | |
13196 | return false; | |
13197 | } | |
13198 | ||
13199 | /* Empty range entries have no effect. */ | |
13200 | if (range_beginning == range_end) | |
13201 | continue; | |
13202 | ||
13203 | range_beginning += base; | |
13204 | range_end += base; | |
13205 | ||
13206 | /* A not-uncommon case of bad debug info. | |
13207 | Don't pollute the addrmap with bad data. */ | |
13208 | if (range_beginning + baseaddr == 0 | |
13209 | && !dwarf2_per_objfile->has_section_at_zero) | |
13210 | { | |
13211 | complaint (&symfile_complaints, | |
13212 | _(".debug_rnglists entry has start address of zero" | |
13213 | " [in module %s]"), objfile_name (objfile)); | |
13214 | continue; | |
13215 | } | |
13216 | ||
13217 | callback (range_beginning, range_end); | |
13218 | } | |
13219 | ||
13220 | if (overflow) | |
13221 | { | |
13222 | complaint (&symfile_complaints, | |
13223 | _("Offset %d is not terminated " | |
13224 | "for DW_AT_ranges attribute"), | |
13225 | offset); | |
13226 | return false; | |
13227 | } | |
13228 | ||
13229 | return true; | |
13230 | } | |
13231 | ||
13232 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13233 | Callback's type should be: | |
13234 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13235 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13236 | |
43988095 | 13237 | template <typename Callback> |
43039443 | 13238 | static int |
5f46c5a5 | 13239 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 13240 | Callback &&callback) |
43039443 JK |
13241 | { |
13242 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 13243 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
13244 | struct comp_unit_head *cu_header = &cu->header; |
13245 | bfd *obfd = objfile->obfd; | |
13246 | unsigned int addr_size = cu_header->addr_size; | |
13247 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13248 | /* Base address selection entry. */ | |
13249 | CORE_ADDR base; | |
13250 | int found_base; | |
13251 | unsigned int dummy; | |
d521ce57 | 13252 | const gdb_byte *buffer; |
ff013f42 | 13253 | CORE_ADDR baseaddr; |
43039443 | 13254 | |
43988095 JK |
13255 | if (cu_header->version >= 5) |
13256 | return dwarf2_rnglists_process (offset, cu, callback); | |
13257 | ||
d00adf39 DE |
13258 | found_base = cu->base_known; |
13259 | base = cu->base_address; | |
43039443 | 13260 | |
be391dca | 13261 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 13262 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
13263 | { |
13264 | complaint (&symfile_complaints, | |
13265 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
13266 | offset); | |
13267 | return 0; | |
13268 | } | |
dce234bc | 13269 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 13270 | |
e7030f15 | 13271 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 13272 | |
43039443 JK |
13273 | while (1) |
13274 | { | |
13275 | CORE_ADDR range_beginning, range_end; | |
13276 | ||
13277 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
13278 | buffer += addr_size; | |
13279 | range_end = read_address (obfd, buffer, cu, &dummy); | |
13280 | buffer += addr_size; | |
13281 | offset += 2 * addr_size; | |
13282 | ||
13283 | /* An end of list marker is a pair of zero addresses. */ | |
13284 | if (range_beginning == 0 && range_end == 0) | |
13285 | /* Found the end of list entry. */ | |
13286 | break; | |
13287 | ||
13288 | /* Each base address selection entry is a pair of 2 values. | |
13289 | The first is the largest possible address, the second is | |
13290 | the base address. Check for a base address here. */ | |
13291 | if ((range_beginning & mask) == mask) | |
13292 | { | |
28d2bfb9 AB |
13293 | /* If we found the largest possible address, then we already |
13294 | have the base address in range_end. */ | |
13295 | base = range_end; | |
43039443 JK |
13296 | found_base = 1; |
13297 | continue; | |
13298 | } | |
13299 | ||
13300 | if (!found_base) | |
13301 | { | |
13302 | /* We have no valid base address for the ranges | |
13303 | data. */ | |
13304 | complaint (&symfile_complaints, | |
13305 | _("Invalid .debug_ranges data (no base address)")); | |
13306 | return 0; | |
13307 | } | |
13308 | ||
9277c30c UW |
13309 | if (range_beginning > range_end) |
13310 | { | |
13311 | /* Inverted range entries are invalid. */ | |
13312 | complaint (&symfile_complaints, | |
13313 | _("Invalid .debug_ranges data (inverted range)")); | |
13314 | return 0; | |
13315 | } | |
13316 | ||
13317 | /* Empty range entries have no effect. */ | |
13318 | if (range_beginning == range_end) | |
13319 | continue; | |
13320 | ||
43039443 JK |
13321 | range_beginning += base; |
13322 | range_end += base; | |
13323 | ||
01093045 DE |
13324 | /* A not-uncommon case of bad debug info. |
13325 | Don't pollute the addrmap with bad data. */ | |
13326 | if (range_beginning + baseaddr == 0 | |
13327 | && !dwarf2_per_objfile->has_section_at_zero) | |
13328 | { | |
13329 | complaint (&symfile_complaints, | |
13330 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 13331 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13332 | continue; |
13333 | } | |
13334 | ||
5f46c5a5 JK |
13335 | callback (range_beginning, range_end); |
13336 | } | |
13337 | ||
13338 | return 1; | |
13339 | } | |
13340 | ||
13341 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13342 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13343 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13344 | ||
13345 | static int | |
13346 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13347 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
13348 | struct partial_symtab *ranges_pst) | |
13349 | { | |
13350 | struct objfile *objfile = cu->objfile; | |
13351 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13352 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
13353 | SECT_OFF_TEXT (objfile)); | |
13354 | int low_set = 0; | |
13355 | CORE_ADDR low = 0; | |
13356 | CORE_ADDR high = 0; | |
13357 | int retval; | |
13358 | ||
13359 | retval = dwarf2_ranges_process (offset, cu, | |
13360 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13361 | { | |
9277c30c | 13362 | if (ranges_pst != NULL) |
3e29f34a MR |
13363 | { |
13364 | CORE_ADDR lowpc; | |
13365 | CORE_ADDR highpc; | |
13366 | ||
13367 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13368 | range_beginning + baseaddr); | |
13369 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13370 | range_end + baseaddr); | |
13371 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
13372 | ranges_pst); | |
13373 | } | |
ff013f42 | 13374 | |
43039443 JK |
13375 | /* FIXME: This is recording everything as a low-high |
13376 | segment of consecutive addresses. We should have a | |
13377 | data structure for discontiguous block ranges | |
13378 | instead. */ | |
13379 | if (! low_set) | |
13380 | { | |
13381 | low = range_beginning; | |
13382 | high = range_end; | |
13383 | low_set = 1; | |
13384 | } | |
13385 | else | |
13386 | { | |
13387 | if (range_beginning < low) | |
13388 | low = range_beginning; | |
13389 | if (range_end > high) | |
13390 | high = range_end; | |
13391 | } | |
5f46c5a5 JK |
13392 | }); |
13393 | if (!retval) | |
13394 | return 0; | |
43039443 JK |
13395 | |
13396 | if (! low_set) | |
13397 | /* If the first entry is an end-of-list marker, the range | |
13398 | describes an empty scope, i.e. no instructions. */ | |
13399 | return 0; | |
13400 | ||
13401 | if (low_return) | |
13402 | *low_return = low; | |
13403 | if (high_return) | |
13404 | *high_return = high; | |
13405 | return 1; | |
13406 | } | |
13407 | ||
3a2b436a JK |
13408 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13409 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13410 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13411 | |
3a2b436a | 13412 | static enum pc_bounds_kind |
af34e669 | 13413 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
13414 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
13415 | struct partial_symtab *pst) | |
c906108c SS |
13416 | { |
13417 | struct attribute *attr; | |
91da1414 | 13418 | struct attribute *attr_high; |
af34e669 DJ |
13419 | CORE_ADDR low = 0; |
13420 | CORE_ADDR high = 0; | |
e385593e | 13421 | enum pc_bounds_kind ret; |
c906108c | 13422 | |
91da1414 MW |
13423 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13424 | if (attr_high) | |
af34e669 | 13425 | { |
e142c38c | 13426 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 13427 | if (attr) |
91da1414 | 13428 | { |
31aa7e4e JB |
13429 | low = attr_value_as_address (attr); |
13430 | high = attr_value_as_address (attr_high); | |
13431 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13432 | high += low; | |
91da1414 | 13433 | } |
af34e669 DJ |
13434 | else |
13435 | /* Found high w/o low attribute. */ | |
e385593e | 13436 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13437 | |
13438 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13439 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13440 | } |
c906108c | 13441 | else |
af34e669 | 13442 | { |
e142c38c | 13443 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13444 | if (attr != NULL) |
13445 | { | |
ab435259 DE |
13446 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13447 | We take advantage of the fact that DW_AT_ranges does not appear | |
13448 | in DW_TAG_compile_unit of DWO files. */ | |
13449 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13450 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13451 | + (need_ranges_base | |
13452 | ? cu->ranges_base | |
13453 | : 0)); | |
2e3cf129 | 13454 | |
af34e669 | 13455 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13456 | .debug_ranges section. */ |
2e3cf129 | 13457 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13458 | return PC_BOUNDS_INVALID; |
43039443 | 13459 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13460 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13461 | } |
e385593e JK |
13462 | else |
13463 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13464 | } |
c906108c | 13465 | |
9373cf26 JK |
13466 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
13467 | if (high <= low) | |
e385593e | 13468 | return PC_BOUNDS_INVALID; |
c906108c SS |
13469 | |
13470 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13471 | eliminate duplicate copies of functions and vtables and such. | |
13472 | The linker will arbitrarily choose one and discard the others. | |
13473 | The AT_*_pc values for such functions refer to local labels in | |
13474 | these sections. If the section from that file was discarded, the | |
13475 | labels are not in the output, so the relocs get a value of 0. | |
13476 | If this is a discarded function, mark the pc bounds as invalid, | |
13477 | so that GDB will ignore it. */ | |
72dca2f5 | 13478 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13479 | return PC_BOUNDS_INVALID; |
c906108c SS |
13480 | |
13481 | *lowpc = low; | |
96408a79 SA |
13482 | if (highpc) |
13483 | *highpc = high; | |
af34e669 | 13484 | return ret; |
c906108c SS |
13485 | } |
13486 | ||
b084d499 JB |
13487 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13488 | its low and high PC addresses. Do nothing if these addresses could not | |
13489 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13490 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13491 | ||
13492 | static void | |
13493 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13494 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13495 | struct dwarf2_cu *cu) | |
13496 | { | |
13497 | CORE_ADDR low, high; | |
13498 | struct die_info *child = die->child; | |
13499 | ||
e385593e | 13500 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13501 | { |
325fac50 PA |
13502 | *lowpc = std::min (*lowpc, low); |
13503 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13504 | } |
13505 | ||
13506 | /* If the language does not allow nested subprograms (either inside | |
13507 | subprograms or lexical blocks), we're done. */ | |
13508 | if (cu->language != language_ada) | |
13509 | return; | |
6e70227d | 13510 | |
b084d499 JB |
13511 | /* Check all the children of the given DIE. If it contains nested |
13512 | subprograms, then check their pc bounds. Likewise, we need to | |
13513 | check lexical blocks as well, as they may also contain subprogram | |
13514 | definitions. */ | |
13515 | while (child && child->tag) | |
13516 | { | |
13517 | if (child->tag == DW_TAG_subprogram | |
13518 | || child->tag == DW_TAG_lexical_block) | |
13519 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13520 | child = sibling_die (child); | |
13521 | } | |
13522 | } | |
13523 | ||
fae299cd DC |
13524 | /* Get the low and high pc's represented by the scope DIE, and store |
13525 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13526 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13527 | ||
13528 | static void | |
13529 | get_scope_pc_bounds (struct die_info *die, | |
13530 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13531 | struct dwarf2_cu *cu) | |
13532 | { | |
13533 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13534 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13535 | CORE_ADDR current_low, current_high; | |
13536 | ||
3a2b436a | 13537 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13538 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13539 | { |
13540 | best_low = current_low; | |
13541 | best_high = current_high; | |
13542 | } | |
13543 | else | |
13544 | { | |
13545 | struct die_info *child = die->child; | |
13546 | ||
13547 | while (child && child->tag) | |
13548 | { | |
13549 | switch (child->tag) { | |
13550 | case DW_TAG_subprogram: | |
b084d499 | 13551 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13552 | break; |
13553 | case DW_TAG_namespace: | |
f55ee35c | 13554 | case DW_TAG_module: |
fae299cd DC |
13555 | /* FIXME: carlton/2004-01-16: Should we do this for |
13556 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13557 | that current GCC's always emit the DIEs corresponding | |
13558 | to definitions of methods of classes as children of a | |
13559 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13560 | the DIEs giving the declarations, which could be | |
13561 | anywhere). But I don't see any reason why the | |
13562 | standards says that they have to be there. */ | |
13563 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13564 | ||
13565 | if (current_low != ((CORE_ADDR) -1)) | |
13566 | { | |
325fac50 PA |
13567 | best_low = std::min (best_low, current_low); |
13568 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13569 | } |
13570 | break; | |
13571 | default: | |
0963b4bd | 13572 | /* Ignore. */ |
fae299cd DC |
13573 | break; |
13574 | } | |
13575 | ||
13576 | child = sibling_die (child); | |
13577 | } | |
13578 | } | |
13579 | ||
13580 | *lowpc = best_low; | |
13581 | *highpc = best_high; | |
13582 | } | |
13583 | ||
801e3a5b JB |
13584 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13585 | in DIE. */ | |
380bca97 | 13586 | |
801e3a5b JB |
13587 | static void |
13588 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
13589 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
13590 | { | |
bb5ed363 | 13591 | struct objfile *objfile = cu->objfile; |
3e29f34a | 13592 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 13593 | struct attribute *attr; |
91da1414 | 13594 | struct attribute *attr_high; |
801e3a5b | 13595 | |
91da1414 MW |
13596 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13597 | if (attr_high) | |
801e3a5b | 13598 | { |
801e3a5b JB |
13599 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
13600 | if (attr) | |
13601 | { | |
31aa7e4e JB |
13602 | CORE_ADDR low = attr_value_as_address (attr); |
13603 | CORE_ADDR high = attr_value_as_address (attr_high); | |
13604 | ||
13605 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13606 | high += low; | |
9a619af0 | 13607 | |
3e29f34a MR |
13608 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
13609 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
13610 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
13611 | } |
13612 | } | |
13613 | ||
13614 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
13615 | if (attr) | |
13616 | { | |
bb5ed363 | 13617 | bfd *obfd = objfile->obfd; |
ab435259 DE |
13618 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13619 | We take advantage of the fact that DW_AT_ranges does not appear | |
13620 | in DW_TAG_compile_unit of DWO files. */ | |
13621 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
13622 | |
13623 | /* The value of the DW_AT_ranges attribute is the offset of the | |
13624 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
13625 | unsigned long offset = (DW_UNSND (attr) |
13626 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 13627 | const gdb_byte *buffer; |
801e3a5b JB |
13628 | |
13629 | /* For some target architectures, but not others, the | |
13630 | read_address function sign-extends the addresses it returns. | |
13631 | To recognize base address selection entries, we need a | |
13632 | mask. */ | |
13633 | unsigned int addr_size = cu->header.addr_size; | |
13634 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13635 | ||
13636 | /* The base address, to which the next pair is relative. Note | |
13637 | that this 'base' is a DWARF concept: most entries in a range | |
13638 | list are relative, to reduce the number of relocs against the | |
13639 | debugging information. This is separate from this function's | |
13640 | 'baseaddr' argument, which GDB uses to relocate debugging | |
13641 | information from a shared library based on the address at | |
13642 | which the library was loaded. */ | |
d00adf39 DE |
13643 | CORE_ADDR base = cu->base_address; |
13644 | int base_known = cu->base_known; | |
801e3a5b | 13645 | |
5f46c5a5 JK |
13646 | dwarf2_ranges_process (offset, cu, |
13647 | [&] (CORE_ADDR start, CORE_ADDR end) | |
13648 | { | |
58fdfd2c JK |
13649 | start += baseaddr; |
13650 | end += baseaddr; | |
5f46c5a5 JK |
13651 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
13652 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
13653 | record_block_range (block, start, end - 1); | |
13654 | }); | |
801e3a5b JB |
13655 | } |
13656 | } | |
13657 | ||
685b1105 JK |
13658 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
13659 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 13660 | |
685b1105 JK |
13661 | static void |
13662 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 13663 | { |
38360086 | 13664 | int major, minor; |
60d5a603 JK |
13665 | |
13666 | if (cu->producer == NULL) | |
13667 | { | |
13668 | /* For unknown compilers expect their behavior is DWARF version | |
13669 | compliant. | |
13670 | ||
13671 | GCC started to support .debug_types sections by -gdwarf-4 since | |
13672 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
13673 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
13674 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
13675 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 13676 | } |
b1ffba5a | 13677 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 13678 | { |
38360086 MW |
13679 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
13680 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 13681 | } |
5230b05a WT |
13682 | else if (producer_is_icc (cu->producer, &major, &minor)) |
13683 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
13684 | else |
13685 | { | |
13686 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
13687 | compliant. */ | |
60d5a603 JK |
13688 | } |
13689 | ||
ba919b58 | 13690 | cu->checked_producer = 1; |
685b1105 | 13691 | } |
ba919b58 | 13692 | |
685b1105 JK |
13693 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
13694 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
13695 | during 4.6.0 experimental. */ | |
13696 | ||
13697 | static int | |
13698 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
13699 | { | |
13700 | if (!cu->checked_producer) | |
13701 | check_producer (cu); | |
13702 | ||
13703 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
13704 | } |
13705 | ||
13706 | /* Return the default accessibility type if it is not overriden by | |
13707 | DW_AT_accessibility. */ | |
13708 | ||
13709 | static enum dwarf_access_attribute | |
13710 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
13711 | { | |
13712 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
13713 | { | |
13714 | /* The default DWARF 2 accessibility for members is public, the default | |
13715 | accessibility for inheritance is private. */ | |
13716 | ||
13717 | if (die->tag != DW_TAG_inheritance) | |
13718 | return DW_ACCESS_public; | |
13719 | else | |
13720 | return DW_ACCESS_private; | |
13721 | } | |
13722 | else | |
13723 | { | |
13724 | /* DWARF 3+ defines the default accessibility a different way. The same | |
13725 | rules apply now for DW_TAG_inheritance as for the members and it only | |
13726 | depends on the container kind. */ | |
13727 | ||
13728 | if (die->parent->tag == DW_TAG_class_type) | |
13729 | return DW_ACCESS_private; | |
13730 | else | |
13731 | return DW_ACCESS_public; | |
13732 | } | |
13733 | } | |
13734 | ||
74ac6d43 TT |
13735 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
13736 | offset. If the attribute was not found return 0, otherwise return | |
13737 | 1. If it was found but could not properly be handled, set *OFFSET | |
13738 | to 0. */ | |
13739 | ||
13740 | static int | |
13741 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
13742 | LONGEST *offset) | |
13743 | { | |
13744 | struct attribute *attr; | |
13745 | ||
13746 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
13747 | if (attr != NULL) | |
13748 | { | |
13749 | *offset = 0; | |
13750 | ||
13751 | /* Note that we do not check for a section offset first here. | |
13752 | This is because DW_AT_data_member_location is new in DWARF 4, | |
13753 | so if we see it, we can assume that a constant form is really | |
13754 | a constant and not a section offset. */ | |
13755 | if (attr_form_is_constant (attr)) | |
13756 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
13757 | else if (attr_form_is_section_offset (attr)) | |
13758 | dwarf2_complex_location_expr_complaint (); | |
13759 | else if (attr_form_is_block (attr)) | |
13760 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
13761 | else | |
13762 | dwarf2_complex_location_expr_complaint (); | |
13763 | ||
13764 | return 1; | |
13765 | } | |
13766 | ||
13767 | return 0; | |
13768 | } | |
13769 | ||
c906108c SS |
13770 | /* Add an aggregate field to the field list. */ |
13771 | ||
13772 | static void | |
107d2387 | 13773 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13774 | struct dwarf2_cu *cu) |
6e70227d | 13775 | { |
e7c27a73 | 13776 | struct objfile *objfile = cu->objfile; |
5e2b427d | 13777 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13778 | struct nextfield *new_field; |
13779 | struct attribute *attr; | |
13780 | struct field *fp; | |
15d034d0 | 13781 | const char *fieldname = ""; |
c906108c SS |
13782 | |
13783 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13784 | new_field = XNEW (struct nextfield); |
b8c9b27d | 13785 | make_cleanup (xfree, new_field); |
c906108c | 13786 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
13787 | |
13788 | if (die->tag == DW_TAG_inheritance) | |
13789 | { | |
13790 | new_field->next = fip->baseclasses; | |
13791 | fip->baseclasses = new_field; | |
13792 | } | |
13793 | else | |
13794 | { | |
13795 | new_field->next = fip->fields; | |
13796 | fip->fields = new_field; | |
13797 | } | |
c906108c SS |
13798 | fip->nfields++; |
13799 | ||
e142c38c | 13800 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
13801 | if (attr) |
13802 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
13803 | else |
13804 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
13805 | if (new_field->accessibility != DW_ACCESS_public) |
13806 | fip->non_public_fields = 1; | |
60d5a603 | 13807 | |
e142c38c | 13808 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
13809 | if (attr) |
13810 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
13811 | else |
13812 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
13813 | |
13814 | fp = &new_field->field; | |
a9a9bd0f | 13815 | |
e142c38c | 13816 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 13817 | { |
74ac6d43 TT |
13818 | LONGEST offset; |
13819 | ||
a9a9bd0f | 13820 | /* Data member other than a C++ static data member. */ |
6e70227d | 13821 | |
c906108c | 13822 | /* Get type of field. */ |
e7c27a73 | 13823 | fp->type = die_type (die, cu); |
c906108c | 13824 | |
d6a843b5 | 13825 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 13826 | |
c906108c | 13827 | /* Get bit size of field (zero if none). */ |
e142c38c | 13828 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
13829 | if (attr) |
13830 | { | |
13831 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
13832 | } | |
13833 | else | |
13834 | { | |
13835 | FIELD_BITSIZE (*fp) = 0; | |
13836 | } | |
13837 | ||
13838 | /* Get bit offset of field. */ | |
74ac6d43 TT |
13839 | if (handle_data_member_location (die, cu, &offset)) |
13840 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 13841 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
13842 | if (attr) |
13843 | { | |
5e2b427d | 13844 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
13845 | { |
13846 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
13847 | additional bit offset from the MSB of the containing |
13848 | anonymous object to the MSB of the field. We don't | |
13849 | have to do anything special since we don't need to | |
13850 | know the size of the anonymous object. */ | |
f41f5e61 | 13851 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
13852 | } |
13853 | else | |
13854 | { | |
13855 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
13856 | MSB of the anonymous object, subtract off the number of |
13857 | bits from the MSB of the field to the MSB of the | |
13858 | object, and then subtract off the number of bits of | |
13859 | the field itself. The result is the bit offset of | |
13860 | the LSB of the field. */ | |
c906108c SS |
13861 | int anonymous_size; |
13862 | int bit_offset = DW_UNSND (attr); | |
13863 | ||
e142c38c | 13864 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13865 | if (attr) |
13866 | { | |
13867 | /* The size of the anonymous object containing | |
13868 | the bit field is explicit, so use the | |
13869 | indicated size (in bytes). */ | |
13870 | anonymous_size = DW_UNSND (attr); | |
13871 | } | |
13872 | else | |
13873 | { | |
13874 | /* The size of the anonymous object containing | |
13875 | the bit field must be inferred from the type | |
13876 | attribute of the data member containing the | |
13877 | bit field. */ | |
13878 | anonymous_size = TYPE_LENGTH (fp->type); | |
13879 | } | |
f41f5e61 PA |
13880 | SET_FIELD_BITPOS (*fp, |
13881 | (FIELD_BITPOS (*fp) | |
13882 | + anonymous_size * bits_per_byte | |
13883 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13884 | } |
13885 | } | |
da5b30da AA |
13886 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13887 | if (attr != NULL) | |
13888 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13889 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13890 | |
13891 | /* Get name of field. */ | |
39cbfefa DJ |
13892 | fieldname = dwarf2_name (die, cu); |
13893 | if (fieldname == NULL) | |
13894 | fieldname = ""; | |
d8151005 DJ |
13895 | |
13896 | /* The name is already allocated along with this objfile, so we don't | |
13897 | need to duplicate it for the type. */ | |
13898 | fp->name = fieldname; | |
c906108c SS |
13899 | |
13900 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13901 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13902 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13903 | { |
d48cc9dd | 13904 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13905 | new_field->accessibility = DW_ACCESS_private; |
13906 | fip->non_public_fields = 1; | |
13907 | } | |
13908 | } | |
a9a9bd0f | 13909 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13910 | { |
a9a9bd0f DC |
13911 | /* C++ static member. */ |
13912 | ||
13913 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13914 | is a declaration, but all versions of G++ as of this writing | |
13915 | (so through at least 3.2.1) incorrectly generate | |
13916 | DW_TAG_variable tags. */ | |
6e70227d | 13917 | |
ff355380 | 13918 | const char *physname; |
c906108c | 13919 | |
a9a9bd0f | 13920 | /* Get name of field. */ |
39cbfefa DJ |
13921 | fieldname = dwarf2_name (die, cu); |
13922 | if (fieldname == NULL) | |
c906108c SS |
13923 | return; |
13924 | ||
254e6b9e | 13925 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13926 | if (attr |
13927 | /* Only create a symbol if this is an external value. | |
13928 | new_symbol checks this and puts the value in the global symbol | |
13929 | table, which we want. If it is not external, new_symbol | |
13930 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13931 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13932 | { |
13933 | /* A static const member, not much different than an enum as far as | |
13934 | we're concerned, except that we can support more types. */ | |
13935 | new_symbol (die, NULL, cu); | |
13936 | } | |
13937 | ||
2df3850c | 13938 | /* Get physical name. */ |
ff355380 | 13939 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13940 | |
d8151005 DJ |
13941 | /* The name is already allocated along with this objfile, so we don't |
13942 | need to duplicate it for the type. */ | |
13943 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13944 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13945 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13946 | } |
13947 | else if (die->tag == DW_TAG_inheritance) | |
13948 | { | |
74ac6d43 | 13949 | LONGEST offset; |
d4b96c9a | 13950 | |
74ac6d43 TT |
13951 | /* C++ base class field. */ |
13952 | if (handle_data_member_location (die, cu, &offset)) | |
13953 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 13954 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 13955 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
13956 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
13957 | fip->nbaseclasses++; | |
13958 | } | |
13959 | } | |
13960 | ||
98751a41 JK |
13961 | /* Add a typedef defined in the scope of the FIP's class. */ |
13962 | ||
13963 | static void | |
13964 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
13965 | struct dwarf2_cu *cu) | |
6e70227d | 13966 | { |
98751a41 | 13967 | struct typedef_field_list *new_field; |
98751a41 | 13968 | struct typedef_field *fp; |
98751a41 JK |
13969 | |
13970 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13971 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
13972 | make_cleanup (xfree, new_field); |
13973 | ||
13974 | gdb_assert (die->tag == DW_TAG_typedef); | |
13975 | ||
13976 | fp = &new_field->field; | |
13977 | ||
13978 | /* Get name of field. */ | |
13979 | fp->name = dwarf2_name (die, cu); | |
13980 | if (fp->name == NULL) | |
13981 | return; | |
13982 | ||
13983 | fp->type = read_type_die (die, cu); | |
13984 | ||
c191a687 KS |
13985 | /* Save accessibility. */ |
13986 | enum dwarf_access_attribute accessibility; | |
13987 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
13988 | if (attr != NULL) | |
13989 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
13990 | else | |
13991 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13992 | switch (accessibility) | |
13993 | { | |
13994 | case DW_ACCESS_public: | |
13995 | /* The assumed value if neither private nor protected. */ | |
13996 | break; | |
13997 | case DW_ACCESS_private: | |
13998 | fp->is_private = 1; | |
13999 | break; | |
14000 | case DW_ACCESS_protected: | |
14001 | fp->is_protected = 1; | |
14002 | break; | |
14003 | default: | |
37534686 KS |
14004 | complaint (&symfile_complaints, |
14005 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); | |
c191a687 KS |
14006 | } |
14007 | ||
98751a41 JK |
14008 | new_field->next = fip->typedef_field_list; |
14009 | fip->typedef_field_list = new_field; | |
14010 | fip->typedef_field_list_count++; | |
14011 | } | |
14012 | ||
c906108c SS |
14013 | /* Create the vector of fields, and attach it to the type. */ |
14014 | ||
14015 | static void | |
fba45db2 | 14016 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14017 | struct dwarf2_cu *cu) |
c906108c SS |
14018 | { |
14019 | int nfields = fip->nfields; | |
14020 | ||
14021 | /* Record the field count, allocate space for the array of fields, | |
14022 | and create blank accessibility bitfields if necessary. */ | |
14023 | TYPE_NFIELDS (type) = nfields; | |
14024 | TYPE_FIELDS (type) = (struct field *) | |
14025 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
14026 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
14027 | ||
b4ba55a1 | 14028 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14029 | { |
14030 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14031 | ||
14032 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14033 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14034 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14035 | ||
14036 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14037 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14038 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14039 | ||
774b6a14 TT |
14040 | TYPE_FIELD_IGNORE_BITS (type) = |
14041 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14042 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14043 | } |
14044 | ||
14045 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14046 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 14047 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
14048 | { |
14049 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 14050 | unsigned char *pointer; |
c906108c SS |
14051 | |
14052 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14053 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14054 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
14055 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
14056 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
14057 | } | |
14058 | ||
3e43a32a MS |
14059 | /* Copy the saved-up fields into the field vector. Start from the head of |
14060 | the list, adding to the tail of the field array, so that they end up in | |
14061 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
14062 | while (nfields-- > 0) |
14063 | { | |
7d0ccb61 DJ |
14064 | struct nextfield *fieldp; |
14065 | ||
14066 | if (fip->fields) | |
14067 | { | |
14068 | fieldp = fip->fields; | |
14069 | fip->fields = fieldp->next; | |
14070 | } | |
14071 | else | |
14072 | { | |
14073 | fieldp = fip->baseclasses; | |
14074 | fip->baseclasses = fieldp->next; | |
14075 | } | |
14076 | ||
14077 | TYPE_FIELD (type, nfields) = fieldp->field; | |
14078 | switch (fieldp->accessibility) | |
c906108c | 14079 | { |
c5aa993b | 14080 | case DW_ACCESS_private: |
b4ba55a1 JB |
14081 | if (cu->language != language_ada) |
14082 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 14083 | break; |
c906108c | 14084 | |
c5aa993b | 14085 | case DW_ACCESS_protected: |
b4ba55a1 JB |
14086 | if (cu->language != language_ada) |
14087 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 14088 | break; |
c906108c | 14089 | |
c5aa993b JM |
14090 | case DW_ACCESS_public: |
14091 | break; | |
c906108c | 14092 | |
c5aa993b JM |
14093 | default: |
14094 | /* Unknown accessibility. Complain and treat it as public. */ | |
14095 | { | |
e2e0b3e5 | 14096 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 14097 | fieldp->accessibility); |
c5aa993b JM |
14098 | } |
14099 | break; | |
c906108c SS |
14100 | } |
14101 | if (nfields < fip->nbaseclasses) | |
14102 | { | |
7d0ccb61 | 14103 | switch (fieldp->virtuality) |
c906108c | 14104 | { |
c5aa993b JM |
14105 | case DW_VIRTUALITY_virtual: |
14106 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14107 | if (cu->language == language_ada) |
a73c6dcd | 14108 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
14109 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
14110 | break; | |
c906108c SS |
14111 | } |
14112 | } | |
c906108c SS |
14113 | } |
14114 | } | |
14115 | ||
7d27a96d TT |
14116 | /* Return true if this member function is a constructor, false |
14117 | otherwise. */ | |
14118 | ||
14119 | static int | |
14120 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14121 | { | |
14122 | const char *fieldname; | |
fe978cb0 | 14123 | const char *type_name; |
7d27a96d TT |
14124 | int len; |
14125 | ||
14126 | if (die->parent == NULL) | |
14127 | return 0; | |
14128 | ||
14129 | if (die->parent->tag != DW_TAG_structure_type | |
14130 | && die->parent->tag != DW_TAG_union_type | |
14131 | && die->parent->tag != DW_TAG_class_type) | |
14132 | return 0; | |
14133 | ||
14134 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14135 | type_name = dwarf2_name (die->parent, cu); |
14136 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14137 | return 0; |
14138 | ||
14139 | len = strlen (fieldname); | |
fe978cb0 PA |
14140 | return (strncmp (fieldname, type_name, len) == 0 |
14141 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14142 | } |
14143 | ||
c906108c SS |
14144 | /* Add a member function to the proper fieldlist. */ |
14145 | ||
14146 | static void | |
107d2387 | 14147 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14148 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14149 | { |
e7c27a73 | 14150 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14151 | struct attribute *attr; |
14152 | struct fnfieldlist *flp; | |
14153 | int i; | |
14154 | struct fn_field *fnp; | |
15d034d0 | 14155 | const char *fieldname; |
c906108c | 14156 | struct nextfnfield *new_fnfield; |
f792889a | 14157 | struct type *this_type; |
60d5a603 | 14158 | enum dwarf_access_attribute accessibility; |
c906108c | 14159 | |
b4ba55a1 | 14160 | if (cu->language == language_ada) |
a73c6dcd | 14161 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14162 | |
2df3850c | 14163 | /* Get name of member function. */ |
39cbfefa DJ |
14164 | fieldname = dwarf2_name (die, cu); |
14165 | if (fieldname == NULL) | |
2df3850c | 14166 | return; |
c906108c | 14167 | |
c906108c SS |
14168 | /* Look up member function name in fieldlist. */ |
14169 | for (i = 0; i < fip->nfnfields; i++) | |
14170 | { | |
27bfe10e | 14171 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
14172 | break; |
14173 | } | |
14174 | ||
14175 | /* Create new list element if necessary. */ | |
14176 | if (i < fip->nfnfields) | |
14177 | flp = &fip->fnfieldlists[i]; | |
14178 | else | |
14179 | { | |
14180 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14181 | { | |
14182 | fip->fnfieldlists = (struct fnfieldlist *) | |
14183 | xrealloc (fip->fnfieldlists, | |
14184 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14185 | * sizeof (struct fnfieldlist)); |
c906108c | 14186 | if (fip->nfnfields == 0) |
c13c43fd | 14187 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
14188 | } |
14189 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
14190 | flp->name = fieldname; | |
14191 | flp->length = 0; | |
14192 | flp->head = NULL; | |
3da10d80 | 14193 | i = fip->nfnfields++; |
c906108c SS |
14194 | } |
14195 | ||
14196 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 14197 | entry. */ |
8d749320 | 14198 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 14199 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
14200 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
14201 | new_fnfield->next = flp->head; | |
14202 | flp->head = new_fnfield; | |
14203 | flp->length++; | |
14204 | ||
14205 | /* Fill in the member function field info. */ | |
14206 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
14207 | |
14208 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14209 | if (cu->language == language_cplus) |
3da10d80 KS |
14210 | { |
14211 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
14212 | die, cu); | |
14213 | } | |
14214 | else | |
14215 | { | |
1d06ead6 | 14216 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14217 | fnp->physname = physname ? physname : ""; |
14218 | } | |
14219 | ||
c906108c | 14220 | fnp->type = alloc_type (objfile); |
f792889a DJ |
14221 | this_type = read_type_die (die, cu); |
14222 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 14223 | { |
f792889a | 14224 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 14225 | |
f792889a | 14226 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
14227 | of the method itself (TYPE_CODE_METHOD). */ |
14228 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
14229 | TYPE_TARGET_TYPE (this_type), |
14230 | TYPE_FIELDS (this_type), | |
14231 | TYPE_NFIELDS (this_type), | |
14232 | TYPE_VARARGS (this_type)); | |
c906108c SS |
14233 | |
14234 | /* Handle static member functions. | |
c5aa993b | 14235 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
14236 | member functions. G++ helps GDB by marking the first |
14237 | parameter for non-static member functions (which is the this | |
14238 | pointer) as artificial. We obtain this information from | |
14239 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 14240 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
14241 | fnp->voffset = VOFFSET_STATIC; |
14242 | } | |
14243 | else | |
e2e0b3e5 | 14244 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 14245 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
14246 | |
14247 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 14248 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 14249 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 14250 | |
3e43a32a MS |
14251 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
14252 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
14253 | |
14254 | /* Get accessibility. */ | |
e142c38c | 14255 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 14256 | if (attr) |
aead7601 | 14257 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
14258 | else |
14259 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14260 | switch (accessibility) | |
c906108c | 14261 | { |
60d5a603 JK |
14262 | case DW_ACCESS_private: |
14263 | fnp->is_private = 1; | |
14264 | break; | |
14265 | case DW_ACCESS_protected: | |
14266 | fnp->is_protected = 1; | |
14267 | break; | |
c906108c SS |
14268 | } |
14269 | ||
b02dede2 | 14270 | /* Check for artificial methods. */ |
e142c38c | 14271 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
14272 | if (attr && DW_UNSND (attr) != 0) |
14273 | fnp->is_artificial = 1; | |
14274 | ||
7d27a96d TT |
14275 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
14276 | ||
0d564a31 | 14277 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
14278 | function. For older versions of GCC, this is an offset in the |
14279 | appropriate virtual table, as specified by DW_AT_containing_type. | |
14280 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
14281 | to the object address. */ |
14282 | ||
e142c38c | 14283 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 14284 | if (attr) |
8e19ed76 | 14285 | { |
aec5aa8b | 14286 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14287 | { |
aec5aa8b TT |
14288 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14289 | { | |
14290 | /* Old-style GCC. */ | |
14291 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14292 | } | |
14293 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14294 | || (DW_BLOCK (attr)->size > 1 | |
14295 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14296 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14297 | { | |
aec5aa8b TT |
14298 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14299 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14300 | dwarf2_complex_location_expr_complaint (); | |
14301 | else | |
14302 | fnp->voffset /= cu->header.addr_size; | |
14303 | fnp->voffset += 2; | |
14304 | } | |
14305 | else | |
14306 | dwarf2_complex_location_expr_complaint (); | |
14307 | ||
14308 | if (!fnp->fcontext) | |
7e993ebf KS |
14309 | { |
14310 | /* If there is no `this' field and no DW_AT_containing_type, | |
14311 | we cannot actually find a base class context for the | |
14312 | vtable! */ | |
14313 | if (TYPE_NFIELDS (this_type) == 0 | |
14314 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14315 | { | |
14316 | complaint (&symfile_complaints, | |
14317 | _("cannot determine context for virtual member " | |
14318 | "function \"%s\" (offset %d)"), | |
9c541725 | 14319 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
14320 | } |
14321 | else | |
14322 | { | |
14323 | fnp->fcontext | |
14324 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14325 | } | |
14326 | } | |
aec5aa8b | 14327 | } |
3690dd37 | 14328 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 14329 | { |
4d3c2250 | 14330 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14331 | } |
14332 | else | |
14333 | { | |
4d3c2250 KB |
14334 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14335 | fieldname); | |
8e19ed76 | 14336 | } |
0d564a31 | 14337 | } |
d48cc9dd DJ |
14338 | else |
14339 | { | |
14340 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14341 | if (attr && DW_UNSND (attr)) | |
14342 | { | |
14343 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
14344 | complaint (&symfile_complaints, | |
3e43a32a MS |
14345 | _("Member function \"%s\" (offset %d) is virtual " |
14346 | "but the vtable offset is not specified"), | |
9c541725 | 14347 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 14348 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14349 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14350 | } | |
14351 | } | |
c906108c SS |
14352 | } |
14353 | ||
14354 | /* Create the vector of member function fields, and attach it to the type. */ | |
14355 | ||
14356 | static void | |
fba45db2 | 14357 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14358 | struct dwarf2_cu *cu) |
c906108c SS |
14359 | { |
14360 | struct fnfieldlist *flp; | |
c906108c SS |
14361 | int i; |
14362 | ||
b4ba55a1 | 14363 | if (cu->language == language_ada) |
a73c6dcd | 14364 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14365 | |
c906108c SS |
14366 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14367 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
14368 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
14369 | ||
14370 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
14371 | { | |
14372 | struct nextfnfield *nfp = flp->head; | |
14373 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
14374 | int k; | |
14375 | ||
14376 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
14377 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
14378 | fn_flp->fn_fields = (struct fn_field *) | |
14379 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
14380 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 14381 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
14382 | } |
14383 | ||
14384 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
14385 | } |
14386 | ||
1168df01 JB |
14387 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14388 | language, zero otherwise. */ | |
14389 | static int | |
14390 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14391 | { | |
14392 | static const char vptr[] = "_vptr"; | |
987504bb | 14393 | static const char vtable[] = "vtable"; |
1168df01 | 14394 | |
9c37b5ae TT |
14395 | /* Look for the C++ form of the vtable. */ |
14396 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14397 | return 1; |
14398 | ||
14399 | return 0; | |
14400 | } | |
14401 | ||
c0dd20ea | 14402 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14403 | functions, with the ABI-specified layout. If TYPE describes |
14404 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14405 | |
14406 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14407 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14408 | |
0b92b5bb TT |
14409 | static void |
14410 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14411 | { |
09e2d7c7 | 14412 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14413 | |
14414 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14415 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14416 | return; | |
c0dd20ea DJ |
14417 | |
14418 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14419 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14420 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14421 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14422 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14423 | return; | |
c0dd20ea DJ |
14424 | |
14425 | /* Find the type of the method. */ | |
0b92b5bb | 14426 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14427 | if (pfn_type == NULL |
14428 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14429 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14430 | return; |
c0dd20ea DJ |
14431 | |
14432 | /* Look for the "this" argument. */ | |
14433 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14434 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14435 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14436 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14437 | return; |
c0dd20ea | 14438 | |
09e2d7c7 | 14439 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14440 | new_type = alloc_type (objfile); |
09e2d7c7 | 14441 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14442 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14443 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14444 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14445 | } |
1168df01 | 14446 | |
685b1105 | 14447 | |
c906108c | 14448 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
14449 | (definition) to create a type for the structure or union. Fill in |
14450 | the type's name and general properties; the members will not be | |
83655187 DE |
14451 | processed until process_structure_scope. A symbol table entry for |
14452 | the type will also not be done until process_structure_scope (assuming | |
14453 | the type has a name). | |
c906108c | 14454 | |
c767944b DJ |
14455 | NOTE: we need to call these functions regardless of whether or not the |
14456 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 14457 | structure or union. This gets the type entered into our set of |
83655187 | 14458 | user defined types. */ |
c906108c | 14459 | |
f792889a | 14460 | static struct type * |
134d01f1 | 14461 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14462 | { |
e7c27a73 | 14463 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14464 | struct type *type; |
14465 | struct attribute *attr; | |
15d034d0 | 14466 | const char *name; |
c906108c | 14467 | |
348e048f DE |
14468 | /* If the definition of this type lives in .debug_types, read that type. |
14469 | Don't follow DW_AT_specification though, that will take us back up | |
14470 | the chain and we want to go down. */ | |
45e58e77 | 14471 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14472 | if (attr) |
14473 | { | |
ac9ec31b | 14474 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14475 | |
ac9ec31b | 14476 | /* The type's CU may not be the same as CU. |
02142a6c | 14477 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14478 | return set_die_type (die, type, cu); |
14479 | } | |
14480 | ||
c0dd20ea | 14481 | type = alloc_type (objfile); |
c906108c | 14482 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 14483 | |
39cbfefa DJ |
14484 | name = dwarf2_name (die, cu); |
14485 | if (name != NULL) | |
c906108c | 14486 | { |
987504bb | 14487 | if (cu->language == language_cplus |
c44af4eb TT |
14488 | || cu->language == language_d |
14489 | || cu->language == language_rust) | |
63d06c5c | 14490 | { |
15d034d0 | 14491 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
14492 | |
14493 | /* dwarf2_full_name might have already finished building the DIE's | |
14494 | type. If so, there is no need to continue. */ | |
14495 | if (get_die_type (die, cu) != NULL) | |
14496 | return get_die_type (die, cu); | |
14497 | ||
14498 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
14499 | if (die->tag == DW_TAG_structure_type |
14500 | || die->tag == DW_TAG_class_type) | |
14501 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
14502 | } |
14503 | else | |
14504 | { | |
d8151005 DJ |
14505 | /* The name is already allocated along with this objfile, so |
14506 | we don't need to duplicate it for the type. */ | |
7d455152 | 14507 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
14508 | if (die->tag == DW_TAG_class_type) |
14509 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 14510 | } |
c906108c SS |
14511 | } |
14512 | ||
14513 | if (die->tag == DW_TAG_structure_type) | |
14514 | { | |
14515 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
14516 | } | |
14517 | else if (die->tag == DW_TAG_union_type) | |
14518 | { | |
14519 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
14520 | } | |
14521 | else | |
14522 | { | |
4753d33b | 14523 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
14524 | } |
14525 | ||
0cc2414c TT |
14526 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
14527 | TYPE_DECLARED_CLASS (type) = 1; | |
14528 | ||
e142c38c | 14529 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14530 | if (attr) |
14531 | { | |
155bfbd3 JB |
14532 | if (attr_form_is_constant (attr)) |
14533 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14534 | else | |
14535 | { | |
14536 | /* For the moment, dynamic type sizes are not supported | |
14537 | by GDB's struct type. The actual size is determined | |
14538 | on-demand when resolving the type of a given object, | |
14539 | so set the type's length to zero for now. Otherwise, | |
14540 | we record an expression as the length, and that expression | |
14541 | could lead to a very large value, which could eventually | |
14542 | lead to us trying to allocate that much memory when creating | |
14543 | a value of that type. */ | |
14544 | TYPE_LENGTH (type) = 0; | |
14545 | } | |
c906108c SS |
14546 | } |
14547 | else | |
14548 | { | |
14549 | TYPE_LENGTH (type) = 0; | |
14550 | } | |
14551 | ||
5230b05a | 14552 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 14553 | { |
5230b05a WT |
14554 | /* ICC<14 does not output the required DW_AT_declaration on |
14555 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 14556 | TYPE_STUB (type) = 1; |
685b1105 JK |
14557 | } |
14558 | else | |
14559 | TYPE_STUB_SUPPORTED (type) = 1; | |
14560 | ||
dc718098 | 14561 | if (die_is_declaration (die, cu)) |
876cecd0 | 14562 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
14563 | else if (attr == NULL && die->child == NULL |
14564 | && producer_is_realview (cu->producer)) | |
14565 | /* RealView does not output the required DW_AT_declaration | |
14566 | on incomplete types. */ | |
14567 | TYPE_STUB (type) = 1; | |
dc718098 | 14568 | |
c906108c SS |
14569 | /* We need to add the type field to the die immediately so we don't |
14570 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 14571 | type within the structure itself. */ |
1c379e20 | 14572 | set_die_type (die, type, cu); |
c906108c | 14573 | |
7e314c57 JK |
14574 | /* set_die_type should be already done. */ |
14575 | set_descriptive_type (type, die, cu); | |
14576 | ||
c767944b DJ |
14577 | return type; |
14578 | } | |
14579 | ||
14580 | /* Finish creating a structure or union type, including filling in | |
14581 | its members and creating a symbol for it. */ | |
14582 | ||
14583 | static void | |
14584 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14585 | { | |
14586 | struct objfile *objfile = cu->objfile; | |
ca040673 | 14587 | struct die_info *child_die; |
c767944b DJ |
14588 | struct type *type; |
14589 | ||
14590 | type = get_die_type (die, cu); | |
14591 | if (type == NULL) | |
14592 | type = read_structure_type (die, cu); | |
14593 | ||
e142c38c | 14594 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
14595 | { |
14596 | struct field_info fi; | |
2f4732b0 | 14597 | std::vector<struct symbol *> template_args; |
c767944b | 14598 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
14599 | |
14600 | memset (&fi, 0, sizeof (struct field_info)); | |
14601 | ||
639d11d3 | 14602 | child_die = die->child; |
c906108c SS |
14603 | |
14604 | while (child_die && child_die->tag) | |
14605 | { | |
a9a9bd0f DC |
14606 | if (child_die->tag == DW_TAG_member |
14607 | || child_die->tag == DW_TAG_variable) | |
c906108c | 14608 | { |
a9a9bd0f DC |
14609 | /* NOTE: carlton/2002-11-05: A C++ static data member |
14610 | should be a DW_TAG_member that is a declaration, but | |
14611 | all versions of G++ as of this writing (so through at | |
14612 | least 3.2.1) incorrectly generate DW_TAG_variable | |
14613 | tags for them instead. */ | |
e7c27a73 | 14614 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14615 | } |
8713b1b1 | 14616 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 14617 | { |
e98c9e7c TT |
14618 | /* Rust doesn't have member functions in the C++ sense. |
14619 | However, it does emit ordinary functions as children | |
14620 | of a struct DIE. */ | |
14621 | if (cu->language == language_rust) | |
14622 | read_func_scope (child_die, cu); | |
14623 | else | |
14624 | { | |
14625 | /* C++ member function. */ | |
14626 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
14627 | } | |
c906108c SS |
14628 | } |
14629 | else if (child_die->tag == DW_TAG_inheritance) | |
14630 | { | |
14631 | /* C++ base class field. */ | |
e7c27a73 | 14632 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14633 | } |
98751a41 JK |
14634 | else if (child_die->tag == DW_TAG_typedef) |
14635 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
14636 | else if (child_die->tag == DW_TAG_template_type_param |
14637 | || child_die->tag == DW_TAG_template_value_param) | |
14638 | { | |
14639 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
14640 | ||
f1078f66 | 14641 | if (arg != NULL) |
2f4732b0 | 14642 | template_args.push_back (arg); |
34eaf542 TT |
14643 | } |
14644 | ||
c906108c SS |
14645 | child_die = sibling_die (child_die); |
14646 | } | |
14647 | ||
34eaf542 | 14648 | /* Attach template arguments to type. */ |
2f4732b0 | 14649 | if (!template_args.empty ()) |
34eaf542 TT |
14650 | { |
14651 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
2f4732b0 | 14652 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 14653 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
14654 | = XOBNEWVEC (&objfile->objfile_obstack, |
14655 | struct symbol *, | |
14656 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 14657 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 14658 | template_args.data (), |
34eaf542 TT |
14659 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
14660 | * sizeof (struct symbol *))); | |
34eaf542 TT |
14661 | } |
14662 | ||
c906108c SS |
14663 | /* Attach fields and member functions to the type. */ |
14664 | if (fi.nfields) | |
e7c27a73 | 14665 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
14666 | if (fi.nfnfields) |
14667 | { | |
e7c27a73 | 14668 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 14669 | |
c5aa993b | 14670 | /* Get the type which refers to the base class (possibly this |
c906108c | 14671 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
14672 | class from the DW_AT_containing_type attribute. This use of |
14673 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 14674 | |
e142c38c | 14675 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 14676 | { |
e7c27a73 | 14677 | struct type *t = die_containing_type (die, cu); |
c906108c | 14678 | |
ae6ae975 | 14679 | set_type_vptr_basetype (type, t); |
c906108c SS |
14680 | if (type == t) |
14681 | { | |
c906108c SS |
14682 | int i; |
14683 | ||
14684 | /* Our own class provides vtbl ptr. */ | |
14685 | for (i = TYPE_NFIELDS (t) - 1; | |
14686 | i >= TYPE_N_BASECLASSES (t); | |
14687 | --i) | |
14688 | { | |
0d5cff50 | 14689 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 14690 | |
1168df01 | 14691 | if (is_vtable_name (fieldname, cu)) |
c906108c | 14692 | { |
ae6ae975 | 14693 | set_type_vptr_fieldno (type, i); |
c906108c SS |
14694 | break; |
14695 | } | |
14696 | } | |
14697 | ||
14698 | /* Complain if virtual function table field not found. */ | |
14699 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 14700 | complaint (&symfile_complaints, |
3e43a32a MS |
14701 | _("virtual function table pointer " |
14702 | "not found when defining class '%s'"), | |
4d3c2250 KB |
14703 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
14704 | ""); | |
c906108c SS |
14705 | } |
14706 | else | |
14707 | { | |
ae6ae975 | 14708 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
14709 | } |
14710 | } | |
f6235d4c | 14711 | else if (cu->producer |
61012eef | 14712 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
14713 | { |
14714 | /* The IBM XLC compiler does not provide direct indication | |
14715 | of the containing type, but the vtable pointer is | |
14716 | always named __vfp. */ | |
14717 | ||
14718 | int i; | |
14719 | ||
14720 | for (i = TYPE_NFIELDS (type) - 1; | |
14721 | i >= TYPE_N_BASECLASSES (type); | |
14722 | --i) | |
14723 | { | |
14724 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
14725 | { | |
ae6ae975 DE |
14726 | set_type_vptr_fieldno (type, i); |
14727 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
14728 | break; |
14729 | } | |
14730 | } | |
14731 | } | |
c906108c | 14732 | } |
98751a41 JK |
14733 | |
14734 | /* Copy fi.typedef_field_list linked list elements content into the | |
14735 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
14736 | if (fi.typedef_field_list) | |
14737 | { | |
14738 | int i = fi.typedef_field_list_count; | |
14739 | ||
a0d7a4ff | 14740 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 14741 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
14742 | = ((struct typedef_field *) |
14743 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
14744 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
14745 | ||
14746 | /* Reverse the list order to keep the debug info elements order. */ | |
14747 | while (--i >= 0) | |
14748 | { | |
14749 | struct typedef_field *dest, *src; | |
6e70227d | 14750 | |
98751a41 JK |
14751 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
14752 | src = &fi.typedef_field_list->field; | |
14753 | fi.typedef_field_list = fi.typedef_field_list->next; | |
14754 | *dest = *src; | |
14755 | } | |
14756 | } | |
c767944b DJ |
14757 | |
14758 | do_cleanups (back_to); | |
c906108c | 14759 | } |
63d06c5c | 14760 | |
bb5ed363 | 14761 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 14762 | |
90aeadfc DC |
14763 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
14764 | snapshots) has been known to create a die giving a declaration | |
14765 | for a class that has, as a child, a die giving a definition for a | |
14766 | nested class. So we have to process our children even if the | |
14767 | current die is a declaration. Normally, of course, a declaration | |
14768 | won't have any children at all. */ | |
134d01f1 | 14769 | |
ca040673 DE |
14770 | child_die = die->child; |
14771 | ||
90aeadfc DC |
14772 | while (child_die != NULL && child_die->tag) |
14773 | { | |
14774 | if (child_die->tag == DW_TAG_member | |
14775 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
14776 | || child_die->tag == DW_TAG_inheritance |
14777 | || child_die->tag == DW_TAG_template_value_param | |
14778 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 14779 | { |
90aeadfc | 14780 | /* Do nothing. */ |
134d01f1 | 14781 | } |
90aeadfc DC |
14782 | else |
14783 | process_die (child_die, cu); | |
134d01f1 | 14784 | |
90aeadfc | 14785 | child_die = sibling_die (child_die); |
134d01f1 DJ |
14786 | } |
14787 | ||
fa4028e9 JB |
14788 | /* Do not consider external references. According to the DWARF standard, |
14789 | these DIEs are identified by the fact that they have no byte_size | |
14790 | attribute, and a declaration attribute. */ | |
14791 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
14792 | || !die_is_declaration (die, cu)) | |
c767944b | 14793 | new_symbol (die, type, cu); |
134d01f1 DJ |
14794 | } |
14795 | ||
55426c9d JB |
14796 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
14797 | update TYPE using some information only available in DIE's children. */ | |
14798 | ||
14799 | static void | |
14800 | update_enumeration_type_from_children (struct die_info *die, | |
14801 | struct type *type, | |
14802 | struct dwarf2_cu *cu) | |
14803 | { | |
60f7655a | 14804 | struct die_info *child_die; |
55426c9d JB |
14805 | int unsigned_enum = 1; |
14806 | int flag_enum = 1; | |
14807 | ULONGEST mask = 0; | |
55426c9d | 14808 | |
8268c778 | 14809 | auto_obstack obstack; |
55426c9d | 14810 | |
60f7655a DE |
14811 | for (child_die = die->child; |
14812 | child_die != NULL && child_die->tag; | |
14813 | child_die = sibling_die (child_die)) | |
55426c9d JB |
14814 | { |
14815 | struct attribute *attr; | |
14816 | LONGEST value; | |
14817 | const gdb_byte *bytes; | |
14818 | struct dwarf2_locexpr_baton *baton; | |
14819 | const char *name; | |
60f7655a | 14820 | |
55426c9d JB |
14821 | if (child_die->tag != DW_TAG_enumerator) |
14822 | continue; | |
14823 | ||
14824 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
14825 | if (attr == NULL) | |
14826 | continue; | |
14827 | ||
14828 | name = dwarf2_name (child_die, cu); | |
14829 | if (name == NULL) | |
14830 | name = "<anonymous enumerator>"; | |
14831 | ||
14832 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
14833 | &value, &bytes, &baton); | |
14834 | if (value < 0) | |
14835 | { | |
14836 | unsigned_enum = 0; | |
14837 | flag_enum = 0; | |
14838 | } | |
14839 | else if ((mask & value) != 0) | |
14840 | flag_enum = 0; | |
14841 | else | |
14842 | mask |= value; | |
14843 | ||
14844 | /* If we already know that the enum type is neither unsigned, nor | |
14845 | a flag type, no need to look at the rest of the enumerates. */ | |
14846 | if (!unsigned_enum && !flag_enum) | |
14847 | break; | |
55426c9d JB |
14848 | } |
14849 | ||
14850 | if (unsigned_enum) | |
14851 | TYPE_UNSIGNED (type) = 1; | |
14852 | if (flag_enum) | |
14853 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
14854 | } |
14855 | ||
134d01f1 DJ |
14856 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
14857 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 14858 | |
f792889a | 14859 | static struct type * |
134d01f1 | 14860 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14861 | { |
e7c27a73 | 14862 | struct objfile *objfile = cu->objfile; |
c906108c | 14863 | struct type *type; |
c906108c | 14864 | struct attribute *attr; |
0114d602 | 14865 | const char *name; |
134d01f1 | 14866 | |
348e048f DE |
14867 | /* If the definition of this type lives in .debug_types, read that type. |
14868 | Don't follow DW_AT_specification though, that will take us back up | |
14869 | the chain and we want to go down. */ | |
45e58e77 | 14870 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14871 | if (attr) |
14872 | { | |
ac9ec31b | 14873 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14874 | |
ac9ec31b | 14875 | /* The type's CU may not be the same as CU. |
02142a6c | 14876 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14877 | return set_die_type (die, type, cu); |
14878 | } | |
14879 | ||
c906108c SS |
14880 | type = alloc_type (objfile); |
14881 | ||
14882 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14883 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14884 | if (name != NULL) |
7d455152 | 14885 | TYPE_TAG_NAME (type) = name; |
c906108c | 14886 | |
0626fc76 TT |
14887 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14888 | if (attr != NULL) | |
14889 | { | |
14890 | struct type *underlying_type = die_type (die, cu); | |
14891 | ||
14892 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14893 | } | |
14894 | ||
e142c38c | 14895 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14896 | if (attr) |
14897 | { | |
14898 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14899 | } | |
14900 | else | |
14901 | { | |
14902 | TYPE_LENGTH (type) = 0; | |
14903 | } | |
14904 | ||
137033e9 JB |
14905 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14906 | declared as private in the package spec, and then defined only | |
14907 | inside the package body. Such types are known as Taft Amendment | |
14908 | Types. When another package uses such a type, an incomplete DIE | |
14909 | may be generated by the compiler. */ | |
02eb380e | 14910 | if (die_is_declaration (die, cu)) |
876cecd0 | 14911 | TYPE_STUB (type) = 1; |
02eb380e | 14912 | |
0626fc76 TT |
14913 | /* Finish the creation of this type by using the enum's children. |
14914 | We must call this even when the underlying type has been provided | |
14915 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14916 | update_enumeration_type_from_children (die, type, cu); |
14917 | ||
0626fc76 TT |
14918 | /* If this type has an underlying type that is not a stub, then we |
14919 | may use its attributes. We always use the "unsigned" attribute | |
14920 | in this situation, because ordinarily we guess whether the type | |
14921 | is unsigned -- but the guess can be wrong and the underlying type | |
14922 | can tell us the reality. However, we defer to a local size | |
14923 | attribute if one exists, because this lets the compiler override | |
14924 | the underlying type if needed. */ | |
14925 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14926 | { | |
14927 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14928 | if (TYPE_LENGTH (type) == 0) | |
14929 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14930 | } | |
14931 | ||
3d567982 TT |
14932 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14933 | ||
f792889a | 14934 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14935 | } |
14936 | ||
14937 | /* Given a pointer to a die which begins an enumeration, process all | |
14938 | the dies that define the members of the enumeration, and create the | |
14939 | symbol for the enumeration type. | |
14940 | ||
14941 | NOTE: We reverse the order of the element list. */ | |
14942 | ||
14943 | static void | |
14944 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14945 | { | |
f792889a | 14946 | struct type *this_type; |
134d01f1 | 14947 | |
f792889a DJ |
14948 | this_type = get_die_type (die, cu); |
14949 | if (this_type == NULL) | |
14950 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 14951 | |
639d11d3 | 14952 | if (die->child != NULL) |
c906108c | 14953 | { |
9dc481d3 DE |
14954 | struct die_info *child_die; |
14955 | struct symbol *sym; | |
14956 | struct field *fields = NULL; | |
14957 | int num_fields = 0; | |
15d034d0 | 14958 | const char *name; |
9dc481d3 | 14959 | |
639d11d3 | 14960 | child_die = die->child; |
c906108c SS |
14961 | while (child_die && child_die->tag) |
14962 | { | |
14963 | if (child_die->tag != DW_TAG_enumerator) | |
14964 | { | |
e7c27a73 | 14965 | process_die (child_die, cu); |
c906108c SS |
14966 | } |
14967 | else | |
14968 | { | |
39cbfefa DJ |
14969 | name = dwarf2_name (child_die, cu); |
14970 | if (name) | |
c906108c | 14971 | { |
f792889a | 14972 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
14973 | |
14974 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14975 | { | |
14976 | fields = (struct field *) | |
14977 | xrealloc (fields, | |
14978 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14979 | * sizeof (struct field)); |
c906108c SS |
14980 | } |
14981 | ||
3567439c | 14982 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 14983 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 14984 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
14985 | FIELD_BITSIZE (fields[num_fields]) = 0; |
14986 | ||
14987 | num_fields++; | |
14988 | } | |
14989 | } | |
14990 | ||
14991 | child_die = sibling_die (child_die); | |
14992 | } | |
14993 | ||
14994 | if (num_fields) | |
14995 | { | |
f792889a DJ |
14996 | TYPE_NFIELDS (this_type) = num_fields; |
14997 | TYPE_FIELDS (this_type) = (struct field *) | |
14998 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
14999 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 15000 | sizeof (struct field) * num_fields); |
b8c9b27d | 15001 | xfree (fields); |
c906108c | 15002 | } |
c906108c | 15003 | } |
134d01f1 | 15004 | |
6c83ed52 TT |
15005 | /* If we are reading an enum from a .debug_types unit, and the enum |
15006 | is a declaration, and the enum is not the signatured type in the | |
15007 | unit, then we do not want to add a symbol for it. Adding a | |
15008 | symbol would in some cases obscure the true definition of the | |
15009 | enum, giving users an incomplete type when the definition is | |
15010 | actually available. Note that we do not want to do this for all | |
15011 | enums which are just declarations, because C++0x allows forward | |
15012 | enum declarations. */ | |
3019eac3 | 15013 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
15014 | && die_is_declaration (die, cu)) |
15015 | { | |
52dc124a | 15016 | struct signatured_type *sig_type; |
6c83ed52 | 15017 | |
c0f78cd4 | 15018 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
15019 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
15020 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
15021 | return; |
15022 | } | |
15023 | ||
f792889a | 15024 | new_symbol (die, this_type, cu); |
c906108c SS |
15025 | } |
15026 | ||
15027 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
15028 | the DIE's type field. For now, this only handles one dimensional | |
15029 | arrays. */ | |
15030 | ||
f792889a | 15031 | static struct type * |
e7c27a73 | 15032 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15033 | { |
e7c27a73 | 15034 | struct objfile *objfile = cu->objfile; |
c906108c | 15035 | struct die_info *child_die; |
7e314c57 | 15036 | struct type *type; |
c906108c | 15037 | struct type *element_type, *range_type, *index_type; |
c906108c | 15038 | struct attribute *attr; |
15d034d0 | 15039 | const char *name; |
dc53a7ad | 15040 | unsigned int bit_stride = 0; |
c906108c | 15041 | |
e7c27a73 | 15042 | element_type = die_type (die, cu); |
c906108c | 15043 | |
7e314c57 JK |
15044 | /* The die_type call above may have already set the type for this DIE. */ |
15045 | type = get_die_type (die, cu); | |
15046 | if (type) | |
15047 | return type; | |
15048 | ||
dc53a7ad JB |
15049 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
15050 | if (attr != NULL) | |
15051 | bit_stride = DW_UNSND (attr) * 8; | |
15052 | ||
15053 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
15054 | if (attr != NULL) | |
15055 | bit_stride = DW_UNSND (attr); | |
15056 | ||
c906108c SS |
15057 | /* Irix 6.2 native cc creates array types without children for |
15058 | arrays with unspecified length. */ | |
639d11d3 | 15059 | if (die->child == NULL) |
c906108c | 15060 | { |
46bf5051 | 15061 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15062 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
15063 | type = create_array_type_with_stride (NULL, element_type, range_type, |
15064 | bit_stride); | |
f792889a | 15065 | return set_die_type (die, type, cu); |
c906108c SS |
15066 | } |
15067 | ||
791afaa2 | 15068 | std::vector<struct type *> range_types; |
639d11d3 | 15069 | child_die = die->child; |
c906108c SS |
15070 | while (child_die && child_die->tag) |
15071 | { | |
15072 | if (child_die->tag == DW_TAG_subrange_type) | |
15073 | { | |
f792889a | 15074 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 15075 | |
f792889a | 15076 | if (child_type != NULL) |
a02abb62 | 15077 | { |
0963b4bd MS |
15078 | /* The range type was succesfully read. Save it for the |
15079 | array type creation. */ | |
791afaa2 | 15080 | range_types.push_back (child_type); |
a02abb62 | 15081 | } |
c906108c SS |
15082 | } |
15083 | child_die = sibling_die (child_die); | |
15084 | } | |
15085 | ||
15086 | /* Dwarf2 dimensions are output from left to right, create the | |
15087 | necessary array types in backwards order. */ | |
7ca2d3a3 | 15088 | |
c906108c | 15089 | type = element_type; |
7ca2d3a3 DL |
15090 | |
15091 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
15092 | { | |
15093 | int i = 0; | |
9a619af0 | 15094 | |
791afaa2 | 15095 | while (i < range_types.size ()) |
dc53a7ad JB |
15096 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
15097 | bit_stride); | |
7ca2d3a3 DL |
15098 | } |
15099 | else | |
15100 | { | |
791afaa2 | 15101 | size_t ndim = range_types.size (); |
7ca2d3a3 | 15102 | while (ndim-- > 0) |
dc53a7ad JB |
15103 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
15104 | bit_stride); | |
7ca2d3a3 | 15105 | } |
c906108c | 15106 | |
f5f8a009 EZ |
15107 | /* Understand Dwarf2 support for vector types (like they occur on |
15108 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
15109 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
15110 | custom vendor extension. The main difference between a regular | |
15111 | array and the vector variant is that vectors are passed by value | |
15112 | to functions. */ | |
e142c38c | 15113 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 15114 | if (attr) |
ea37ba09 | 15115 | make_vector_type (type); |
f5f8a009 | 15116 | |
dbc98a8b KW |
15117 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
15118 | implementation may choose to implement triple vectors using this | |
15119 | attribute. */ | |
15120 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
15121 | if (attr) | |
15122 | { | |
15123 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
15124 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15125 | else | |
3e43a32a MS |
15126 | complaint (&symfile_complaints, |
15127 | _("DW_AT_byte_size for array type smaller " | |
15128 | "than the total size of elements")); | |
dbc98a8b KW |
15129 | } |
15130 | ||
39cbfefa DJ |
15131 | name = dwarf2_name (die, cu); |
15132 | if (name) | |
15133 | TYPE_NAME (type) = name; | |
6e70227d | 15134 | |
0963b4bd | 15135 | /* Install the type in the die. */ |
7e314c57 JK |
15136 | set_die_type (die, type, cu); |
15137 | ||
15138 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15139 | set_descriptive_type (type, die, cu); |
15140 | ||
7e314c57 | 15141 | return type; |
c906108c SS |
15142 | } |
15143 | ||
7ca2d3a3 | 15144 | static enum dwarf_array_dim_ordering |
6e70227d | 15145 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
15146 | { |
15147 | struct attribute *attr; | |
15148 | ||
15149 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
15150 | ||
aead7601 SM |
15151 | if (attr) |
15152 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 15153 | |
0963b4bd MS |
15154 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
15155 | opposite order to the dwarf2 specification, but data is still | |
15156 | laid out as per normal fortran. | |
7ca2d3a3 | 15157 | |
0963b4bd MS |
15158 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
15159 | version checking. */ | |
7ca2d3a3 | 15160 | |
905e0470 PM |
15161 | if (cu->language == language_fortran |
15162 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
15163 | { |
15164 | return DW_ORD_row_major; | |
15165 | } | |
15166 | ||
6e70227d | 15167 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
15168 | { |
15169 | case array_column_major: | |
15170 | return DW_ORD_col_major; | |
15171 | case array_row_major: | |
15172 | default: | |
15173 | return DW_ORD_row_major; | |
15174 | }; | |
15175 | } | |
15176 | ||
72019c9c | 15177 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 15178 | the DIE's type field. */ |
72019c9c | 15179 | |
f792889a | 15180 | static struct type * |
72019c9c GM |
15181 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
15182 | { | |
7e314c57 JK |
15183 | struct type *domain_type, *set_type; |
15184 | struct attribute *attr; | |
f792889a | 15185 | |
7e314c57 JK |
15186 | domain_type = die_type (die, cu); |
15187 | ||
15188 | /* The die_type call above may have already set the type for this DIE. */ | |
15189 | set_type = get_die_type (die, cu); | |
15190 | if (set_type) | |
15191 | return set_type; | |
15192 | ||
15193 | set_type = create_set_type (NULL, domain_type); | |
15194 | ||
15195 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
15196 | if (attr) |
15197 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 15198 | |
f792889a | 15199 | return set_die_type (die, set_type, cu); |
72019c9c | 15200 | } |
7ca2d3a3 | 15201 | |
0971de02 TT |
15202 | /* A helper for read_common_block that creates a locexpr baton. |
15203 | SYM is the symbol which we are marking as computed. | |
15204 | COMMON_DIE is the DIE for the common block. | |
15205 | COMMON_LOC is the location expression attribute for the common | |
15206 | block itself. | |
15207 | MEMBER_LOC is the location expression attribute for the particular | |
15208 | member of the common block that we are processing. | |
15209 | CU is the CU from which the above come. */ | |
15210 | ||
15211 | static void | |
15212 | mark_common_block_symbol_computed (struct symbol *sym, | |
15213 | struct die_info *common_die, | |
15214 | struct attribute *common_loc, | |
15215 | struct attribute *member_loc, | |
15216 | struct dwarf2_cu *cu) | |
15217 | { | |
15218 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
15219 | struct dwarf2_locexpr_baton *baton; | |
15220 | gdb_byte *ptr; | |
15221 | unsigned int cu_off; | |
15222 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
15223 | LONGEST offset = 0; | |
15224 | ||
15225 | gdb_assert (common_loc && member_loc); | |
15226 | gdb_assert (attr_form_is_block (common_loc)); | |
15227 | gdb_assert (attr_form_is_block (member_loc) | |
15228 | || attr_form_is_constant (member_loc)); | |
15229 | ||
8d749320 | 15230 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
15231 | baton->per_cu = cu->per_cu; |
15232 | gdb_assert (baton->per_cu); | |
15233 | ||
15234 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
15235 | ||
15236 | if (attr_form_is_constant (member_loc)) | |
15237 | { | |
15238 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
15239 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
15240 | } | |
15241 | else | |
15242 | baton->size += DW_BLOCK (member_loc)->size; | |
15243 | ||
224c3ddb | 15244 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
15245 | baton->data = ptr; |
15246 | ||
15247 | *ptr++ = DW_OP_call4; | |
9c541725 | 15248 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
15249 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
15250 | ptr += 4; | |
15251 | ||
15252 | if (attr_form_is_constant (member_loc)) | |
15253 | { | |
15254 | *ptr++ = DW_OP_addr; | |
15255 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
15256 | ptr += cu->header.addr_size; | |
15257 | } | |
15258 | else | |
15259 | { | |
15260 | /* We have to copy the data here, because DW_OP_call4 will only | |
15261 | use a DW_AT_location attribute. */ | |
15262 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
15263 | ptr += DW_BLOCK (member_loc)->size; | |
15264 | } | |
15265 | ||
15266 | *ptr++ = DW_OP_plus; | |
15267 | gdb_assert (ptr - baton->data == baton->size); | |
15268 | ||
0971de02 | 15269 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 15270 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
15271 | } |
15272 | ||
4357ac6c TT |
15273 | /* Create appropriate locally-scoped variables for all the |
15274 | DW_TAG_common_block entries. Also create a struct common_block | |
15275 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
15276 | is used to sepate the common blocks name namespace from regular | |
15277 | variable names. */ | |
c906108c SS |
15278 | |
15279 | static void | |
e7c27a73 | 15280 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15281 | { |
0971de02 TT |
15282 | struct attribute *attr; |
15283 | ||
15284 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
15285 | if (attr) | |
15286 | { | |
15287 | /* Support the .debug_loc offsets. */ | |
15288 | if (attr_form_is_block (attr)) | |
15289 | { | |
15290 | /* Ok. */ | |
15291 | } | |
15292 | else if (attr_form_is_section_offset (attr)) | |
15293 | { | |
15294 | dwarf2_complex_location_expr_complaint (); | |
15295 | attr = NULL; | |
15296 | } | |
15297 | else | |
15298 | { | |
15299 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15300 | "common block member"); | |
15301 | attr = NULL; | |
15302 | } | |
15303 | } | |
15304 | ||
639d11d3 | 15305 | if (die->child != NULL) |
c906108c | 15306 | { |
4357ac6c TT |
15307 | struct objfile *objfile = cu->objfile; |
15308 | struct die_info *child_die; | |
15309 | size_t n_entries = 0, size; | |
15310 | struct common_block *common_block; | |
15311 | struct symbol *sym; | |
74ac6d43 | 15312 | |
4357ac6c TT |
15313 | for (child_die = die->child; |
15314 | child_die && child_die->tag; | |
15315 | child_die = sibling_die (child_die)) | |
15316 | ++n_entries; | |
15317 | ||
15318 | size = (sizeof (struct common_block) | |
15319 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
15320 | common_block |
15321 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
15322 | size); | |
4357ac6c TT |
15323 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
15324 | common_block->n_entries = 0; | |
15325 | ||
15326 | for (child_die = die->child; | |
15327 | child_die && child_die->tag; | |
15328 | child_die = sibling_die (child_die)) | |
15329 | { | |
15330 | /* Create the symbol in the DW_TAG_common_block block in the current | |
15331 | symbol scope. */ | |
e7c27a73 | 15332 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
15333 | if (sym != NULL) |
15334 | { | |
15335 | struct attribute *member_loc; | |
15336 | ||
15337 | common_block->contents[common_block->n_entries++] = sym; | |
15338 | ||
15339 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
15340 | cu); | |
15341 | if (member_loc) | |
15342 | { | |
15343 | /* GDB has handled this for a long time, but it is | |
15344 | not specified by DWARF. It seems to have been | |
15345 | emitted by gfortran at least as recently as: | |
15346 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
15347 | complaint (&symfile_complaints, | |
15348 | _("Variable in common block has " | |
15349 | "DW_AT_data_member_location " | |
15350 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15351 | to_underlying (child_die->sect_off), |
4262abfb | 15352 | objfile_name (cu->objfile)); |
0971de02 TT |
15353 | |
15354 | if (attr_form_is_section_offset (member_loc)) | |
15355 | dwarf2_complex_location_expr_complaint (); | |
15356 | else if (attr_form_is_constant (member_loc) | |
15357 | || attr_form_is_block (member_loc)) | |
15358 | { | |
15359 | if (attr) | |
15360 | mark_common_block_symbol_computed (sym, die, attr, | |
15361 | member_loc, cu); | |
15362 | } | |
15363 | else | |
15364 | dwarf2_complex_location_expr_complaint (); | |
15365 | } | |
15366 | } | |
c906108c | 15367 | } |
4357ac6c TT |
15368 | |
15369 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
15370 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
15371 | } |
15372 | } | |
15373 | ||
0114d602 | 15374 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 15375 | |
0114d602 DJ |
15376 | static struct type * |
15377 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 15378 | { |
e7c27a73 | 15379 | struct objfile *objfile = cu->objfile; |
0114d602 | 15380 | const char *previous_prefix, *name; |
9219021c | 15381 | int is_anonymous; |
0114d602 DJ |
15382 | struct type *type; |
15383 | ||
15384 | /* For extensions, reuse the type of the original namespace. */ | |
15385 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
15386 | { | |
15387 | struct die_info *ext_die; | |
15388 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 15389 | |
0114d602 DJ |
15390 | ext_die = dwarf2_extension (die, &ext_cu); |
15391 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
15392 | |
15393 | /* EXT_CU may not be the same as CU. | |
02142a6c | 15394 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
15395 | return set_die_type (die, type, cu); |
15396 | } | |
9219021c | 15397 | |
e142c38c | 15398 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
15399 | |
15400 | /* Now build the name of the current namespace. */ | |
15401 | ||
0114d602 DJ |
15402 | previous_prefix = determine_prefix (die, cu); |
15403 | if (previous_prefix[0] != '\0') | |
15404 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 15405 | previous_prefix, name, 0, cu); |
0114d602 DJ |
15406 | |
15407 | /* Create the type. */ | |
19f392bc | 15408 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
15409 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
15410 | ||
60531b24 | 15411 | return set_die_type (die, type, cu); |
0114d602 DJ |
15412 | } |
15413 | ||
22cee43f | 15414 | /* Read a namespace scope. */ |
0114d602 DJ |
15415 | |
15416 | static void | |
15417 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
15418 | { | |
15419 | struct objfile *objfile = cu->objfile; | |
0114d602 | 15420 | int is_anonymous; |
9219021c | 15421 | |
5c4e30ca DC |
15422 | /* Add a symbol associated to this if we haven't seen the namespace |
15423 | before. Also, add a using directive if it's an anonymous | |
15424 | namespace. */ | |
9219021c | 15425 | |
f2f0e013 | 15426 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
15427 | { |
15428 | struct type *type; | |
15429 | ||
0114d602 | 15430 | type = read_type_die (die, cu); |
e7c27a73 | 15431 | new_symbol (die, type, cu); |
5c4e30ca | 15432 | |
e8e80198 | 15433 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 15434 | if (is_anonymous) |
0114d602 DJ |
15435 | { |
15436 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 15437 | |
eb1e02fd | 15438 | std::vector<const char *> excludes; |
22cee43f PMR |
15439 | add_using_directive (using_directives (cu->language), |
15440 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 15441 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 15442 | } |
5c4e30ca | 15443 | } |
9219021c | 15444 | |
639d11d3 | 15445 | if (die->child != NULL) |
d9fa45fe | 15446 | { |
639d11d3 | 15447 | struct die_info *child_die = die->child; |
6e70227d | 15448 | |
d9fa45fe DC |
15449 | while (child_die && child_die->tag) |
15450 | { | |
e7c27a73 | 15451 | process_die (child_die, cu); |
d9fa45fe DC |
15452 | child_die = sibling_die (child_die); |
15453 | } | |
15454 | } | |
38d518c9 EZ |
15455 | } |
15456 | ||
f55ee35c JK |
15457 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
15458 | imported module. Still we need that type as local Fortran "use ... only" | |
15459 | declaration imports depend on the created type in determine_prefix. */ | |
15460 | ||
15461 | static struct type * | |
15462 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
15463 | { | |
15464 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 15465 | const char *module_name; |
f55ee35c JK |
15466 | struct type *type; |
15467 | ||
15468 | module_name = dwarf2_name (die, cu); | |
15469 | if (!module_name) | |
3e43a32a MS |
15470 | complaint (&symfile_complaints, |
15471 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 15472 | to_underlying (die->sect_off)); |
19f392bc | 15473 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
15474 | |
15475 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
15476 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
15477 | ||
15478 | return set_die_type (die, type, cu); | |
15479 | } | |
15480 | ||
5d7cb8df JK |
15481 | /* Read a Fortran module. */ |
15482 | ||
15483 | static void | |
15484 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
15485 | { | |
15486 | struct die_info *child_die = die->child; | |
530e8392 KB |
15487 | struct type *type; |
15488 | ||
15489 | type = read_type_die (die, cu); | |
15490 | new_symbol (die, type, cu); | |
5d7cb8df | 15491 | |
5d7cb8df JK |
15492 | while (child_die && child_die->tag) |
15493 | { | |
15494 | process_die (child_die, cu); | |
15495 | child_die = sibling_die (child_die); | |
15496 | } | |
15497 | } | |
15498 | ||
38d518c9 EZ |
15499 | /* Return the name of the namespace represented by DIE. Set |
15500 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
15501 | namespace. */ | |
15502 | ||
15503 | static const char * | |
e142c38c | 15504 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
15505 | { |
15506 | struct die_info *current_die; | |
15507 | const char *name = NULL; | |
15508 | ||
15509 | /* Loop through the extensions until we find a name. */ | |
15510 | ||
15511 | for (current_die = die; | |
15512 | current_die != NULL; | |
f2f0e013 | 15513 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 15514 | { |
96553a0c DE |
15515 | /* We don't use dwarf2_name here so that we can detect the absence |
15516 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 15517 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 15518 | |
38d518c9 EZ |
15519 | if (name != NULL) |
15520 | break; | |
15521 | } | |
15522 | ||
15523 | /* Is it an anonymous namespace? */ | |
15524 | ||
15525 | *is_anonymous = (name == NULL); | |
15526 | if (*is_anonymous) | |
2b1dbab0 | 15527 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
15528 | |
15529 | return name; | |
d9fa45fe DC |
15530 | } |
15531 | ||
c906108c SS |
15532 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
15533 | the user defined type vector. */ | |
15534 | ||
f792889a | 15535 | static struct type * |
e7c27a73 | 15536 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15537 | { |
5e2b427d | 15538 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 15539 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 15540 | struct type *type; |
8b2dbe47 KB |
15541 | struct attribute *attr_byte_size; |
15542 | struct attribute *attr_address_class; | |
15543 | int byte_size, addr_class; | |
7e314c57 JK |
15544 | struct type *target_type; |
15545 | ||
15546 | target_type = die_type (die, cu); | |
c906108c | 15547 | |
7e314c57 JK |
15548 | /* The die_type call above may have already set the type for this DIE. */ |
15549 | type = get_die_type (die, cu); | |
15550 | if (type) | |
15551 | return type; | |
15552 | ||
15553 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 15554 | |
e142c38c | 15555 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
15556 | if (attr_byte_size) |
15557 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 15558 | else |
8b2dbe47 KB |
15559 | byte_size = cu_header->addr_size; |
15560 | ||
e142c38c | 15561 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
15562 | if (attr_address_class) |
15563 | addr_class = DW_UNSND (attr_address_class); | |
15564 | else | |
15565 | addr_class = DW_ADDR_none; | |
15566 | ||
15567 | /* If the pointer size or address class is different than the | |
15568 | default, create a type variant marked as such and set the | |
15569 | length accordingly. */ | |
15570 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 15571 | { |
5e2b427d | 15572 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
15573 | { |
15574 | int type_flags; | |
15575 | ||
849957d9 | 15576 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 15577 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
15578 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
15579 | == 0); | |
8b2dbe47 KB |
15580 | type = make_type_with_address_space (type, type_flags); |
15581 | } | |
15582 | else if (TYPE_LENGTH (type) != byte_size) | |
15583 | { | |
3e43a32a MS |
15584 | complaint (&symfile_complaints, |
15585 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 15586 | } |
6e70227d | 15587 | else |
9a619af0 MS |
15588 | { |
15589 | /* Should we also complain about unhandled address classes? */ | |
15590 | } | |
c906108c | 15591 | } |
8b2dbe47 KB |
15592 | |
15593 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 15594 | return set_die_type (die, type, cu); |
c906108c SS |
15595 | } |
15596 | ||
15597 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
15598 | the user defined type vector. */ | |
15599 | ||
f792889a | 15600 | static struct type * |
e7c27a73 | 15601 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
15602 | { |
15603 | struct type *type; | |
15604 | struct type *to_type; | |
15605 | struct type *domain; | |
15606 | ||
e7c27a73 DJ |
15607 | to_type = die_type (die, cu); |
15608 | domain = die_containing_type (die, cu); | |
0d5de010 | 15609 | |
7e314c57 JK |
15610 | /* The calls above may have already set the type for this DIE. */ |
15611 | type = get_die_type (die, cu); | |
15612 | if (type) | |
15613 | return type; | |
15614 | ||
0d5de010 DJ |
15615 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
15616 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
15617 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
15618 | { | |
15619 | struct type *new_type = alloc_type (cu->objfile); | |
15620 | ||
15621 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
15622 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
15623 | TYPE_VARARGS (to_type)); | |
15624 | type = lookup_methodptr_type (new_type); | |
15625 | } | |
0d5de010 DJ |
15626 | else |
15627 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 15628 | |
f792889a | 15629 | return set_die_type (die, type, cu); |
c906108c SS |
15630 | } |
15631 | ||
4297a3f0 | 15632 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
15633 | the user defined type vector. */ |
15634 | ||
f792889a | 15635 | static struct type * |
4297a3f0 AV |
15636 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
15637 | enum type_code refcode) | |
c906108c | 15638 | { |
e7c27a73 | 15639 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 15640 | struct type *type, *target_type; |
c906108c SS |
15641 | struct attribute *attr; |
15642 | ||
4297a3f0 AV |
15643 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
15644 | ||
7e314c57 JK |
15645 | target_type = die_type (die, cu); |
15646 | ||
15647 | /* The die_type call above may have already set the type for this DIE. */ | |
15648 | type = get_die_type (die, cu); | |
15649 | if (type) | |
15650 | return type; | |
15651 | ||
4297a3f0 | 15652 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 15653 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15654 | if (attr) |
15655 | { | |
15656 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15657 | } | |
15658 | else | |
15659 | { | |
107d2387 | 15660 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 15661 | } |
f792889a | 15662 | return set_die_type (die, type, cu); |
c906108c SS |
15663 | } |
15664 | ||
cf363f18 MW |
15665 | /* Add the given cv-qualifiers to the element type of the array. GCC |
15666 | outputs DWARF type qualifiers that apply to an array, not the | |
15667 | element type. But GDB relies on the array element type to carry | |
15668 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
15669 | specification. */ | |
15670 | ||
15671 | static struct type * | |
15672 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
15673 | struct type *base_type, int cnst, int voltl) | |
15674 | { | |
15675 | struct type *el_type, *inner_array; | |
15676 | ||
15677 | base_type = copy_type (base_type); | |
15678 | inner_array = base_type; | |
15679 | ||
15680 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
15681 | { | |
15682 | TYPE_TARGET_TYPE (inner_array) = | |
15683 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
15684 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
15685 | } | |
15686 | ||
15687 | el_type = TYPE_TARGET_TYPE (inner_array); | |
15688 | cnst |= TYPE_CONST (el_type); | |
15689 | voltl |= TYPE_VOLATILE (el_type); | |
15690 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
15691 | ||
15692 | return set_die_type (die, base_type, cu); | |
15693 | } | |
15694 | ||
f792889a | 15695 | static struct type * |
e7c27a73 | 15696 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15697 | { |
f792889a | 15698 | struct type *base_type, *cv_type; |
c906108c | 15699 | |
e7c27a73 | 15700 | base_type = die_type (die, cu); |
7e314c57 JK |
15701 | |
15702 | /* The die_type call above may have already set the type for this DIE. */ | |
15703 | cv_type = get_die_type (die, cu); | |
15704 | if (cv_type) | |
15705 | return cv_type; | |
15706 | ||
2f608a3a KW |
15707 | /* In case the const qualifier is applied to an array type, the element type |
15708 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
15709 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 15710 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 15711 | |
f792889a DJ |
15712 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
15713 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15714 | } |
15715 | ||
f792889a | 15716 | static struct type * |
e7c27a73 | 15717 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15718 | { |
f792889a | 15719 | struct type *base_type, *cv_type; |
c906108c | 15720 | |
e7c27a73 | 15721 | base_type = die_type (die, cu); |
7e314c57 JK |
15722 | |
15723 | /* The die_type call above may have already set the type for this DIE. */ | |
15724 | cv_type = get_die_type (die, cu); | |
15725 | if (cv_type) | |
15726 | return cv_type; | |
15727 | ||
cf363f18 MW |
15728 | /* In case the volatile qualifier is applied to an array type, the |
15729 | element type is so qualified, not the array type (section 6.7.3 | |
15730 | of C99). */ | |
15731 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
15732 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
15733 | ||
f792889a DJ |
15734 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
15735 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15736 | } |
15737 | ||
06d66ee9 TT |
15738 | /* Handle DW_TAG_restrict_type. */ |
15739 | ||
15740 | static struct type * | |
15741 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
15742 | { | |
15743 | struct type *base_type, *cv_type; | |
15744 | ||
15745 | base_type = die_type (die, cu); | |
15746 | ||
15747 | /* The die_type call above may have already set the type for this DIE. */ | |
15748 | cv_type = get_die_type (die, cu); | |
15749 | if (cv_type) | |
15750 | return cv_type; | |
15751 | ||
15752 | cv_type = make_restrict_type (base_type); | |
15753 | return set_die_type (die, cv_type, cu); | |
15754 | } | |
15755 | ||
a2c2acaf MW |
15756 | /* Handle DW_TAG_atomic_type. */ |
15757 | ||
15758 | static struct type * | |
15759 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
15760 | { | |
15761 | struct type *base_type, *cv_type; | |
15762 | ||
15763 | base_type = die_type (die, cu); | |
15764 | ||
15765 | /* The die_type call above may have already set the type for this DIE. */ | |
15766 | cv_type = get_die_type (die, cu); | |
15767 | if (cv_type) | |
15768 | return cv_type; | |
15769 | ||
15770 | cv_type = make_atomic_type (base_type); | |
15771 | return set_die_type (die, cv_type, cu); | |
15772 | } | |
15773 | ||
c906108c SS |
15774 | /* Extract all information from a DW_TAG_string_type DIE and add to |
15775 | the user defined type vector. It isn't really a user defined type, | |
15776 | but it behaves like one, with other DIE's using an AT_user_def_type | |
15777 | attribute to reference it. */ | |
15778 | ||
f792889a | 15779 | static struct type * |
e7c27a73 | 15780 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15781 | { |
e7c27a73 | 15782 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 15783 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15784 | struct type *type, *range_type, *index_type, *char_type; |
15785 | struct attribute *attr; | |
15786 | unsigned int length; | |
15787 | ||
e142c38c | 15788 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
15789 | if (attr) |
15790 | { | |
15791 | length = DW_UNSND (attr); | |
15792 | } | |
15793 | else | |
15794 | { | |
0963b4bd | 15795 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 15796 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
15797 | if (attr) |
15798 | { | |
15799 | length = DW_UNSND (attr); | |
15800 | } | |
15801 | else | |
15802 | { | |
15803 | length = 1; | |
15804 | } | |
c906108c | 15805 | } |
6ccb9162 | 15806 | |
46bf5051 | 15807 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15808 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
15809 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
15810 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 15811 | |
f792889a | 15812 | return set_die_type (die, type, cu); |
c906108c SS |
15813 | } |
15814 | ||
4d804846 JB |
15815 | /* Assuming that DIE corresponds to a function, returns nonzero |
15816 | if the function is prototyped. */ | |
15817 | ||
15818 | static int | |
15819 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
15820 | { | |
15821 | struct attribute *attr; | |
15822 | ||
15823 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
15824 | if (attr && (DW_UNSND (attr) != 0)) | |
15825 | return 1; | |
15826 | ||
15827 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
15828 | is only meaninful for C, but the concept also extends to other | |
15829 | languages that allow unprototyped functions (Eg: Objective C). | |
15830 | For all other languages, assume that functions are always | |
15831 | prototyped. */ | |
15832 | if (cu->language != language_c | |
15833 | && cu->language != language_objc | |
15834 | && cu->language != language_opencl) | |
15835 | return 1; | |
15836 | ||
15837 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
15838 | prototyped and unprototyped functions; default to prototyped, | |
15839 | since that is more common in modern code (and RealView warns | |
15840 | about unprototyped functions). */ | |
15841 | if (producer_is_realview (cu->producer)) | |
15842 | return 1; | |
15843 | ||
15844 | return 0; | |
15845 | } | |
15846 | ||
c906108c SS |
15847 | /* Handle DIES due to C code like: |
15848 | ||
15849 | struct foo | |
c5aa993b JM |
15850 | { |
15851 | int (*funcp)(int a, long l); | |
15852 | int b; | |
15853 | }; | |
c906108c | 15854 | |
0963b4bd | 15855 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 15856 | |
f792889a | 15857 | static struct type * |
e7c27a73 | 15858 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15859 | { |
bb5ed363 | 15860 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
15861 | struct type *type; /* Type that this function returns. */ |
15862 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
15863 | struct attribute *attr; |
15864 | ||
e7c27a73 | 15865 | type = die_type (die, cu); |
7e314c57 JK |
15866 | |
15867 | /* The die_type call above may have already set the type for this DIE. */ | |
15868 | ftype = get_die_type (die, cu); | |
15869 | if (ftype) | |
15870 | return ftype; | |
15871 | ||
0c8b41f1 | 15872 | ftype = lookup_function_type (type); |
c906108c | 15873 | |
4d804846 | 15874 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15875 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15876 | |
c055b101 CV |
15877 | /* Store the calling convention in the type if it's available in |
15878 | the subroutine die. Otherwise set the calling convention to | |
15879 | the default value DW_CC_normal. */ | |
15880 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15881 | if (attr) |
15882 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15883 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15884 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15885 | else | |
15886 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15887 | |
743649fd MW |
15888 | /* Record whether the function returns normally to its caller or not |
15889 | if the DWARF producer set that information. */ | |
15890 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15891 | if (attr && (DW_UNSND (attr) != 0)) | |
15892 | TYPE_NO_RETURN (ftype) = 1; | |
15893 | ||
76c10ea2 GM |
15894 | /* We need to add the subroutine type to the die immediately so |
15895 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15896 | declared as the same subroutine type. */ |
76c10ea2 | 15897 | set_die_type (die, ftype, cu); |
6e70227d | 15898 | |
639d11d3 | 15899 | if (die->child != NULL) |
c906108c | 15900 | { |
bb5ed363 | 15901 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15902 | struct die_info *child_die; |
8072405b | 15903 | int nparams, iparams; |
c906108c SS |
15904 | |
15905 | /* Count the number of parameters. | |
15906 | FIXME: GDB currently ignores vararg functions, but knows about | |
15907 | vararg member functions. */ | |
8072405b | 15908 | nparams = 0; |
639d11d3 | 15909 | child_die = die->child; |
c906108c SS |
15910 | while (child_die && child_die->tag) |
15911 | { | |
15912 | if (child_die->tag == DW_TAG_formal_parameter) | |
15913 | nparams++; | |
15914 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15915 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15916 | child_die = sibling_die (child_die); |
15917 | } | |
15918 | ||
15919 | /* Allocate storage for parameters and fill them in. */ | |
15920 | TYPE_NFIELDS (ftype) = nparams; | |
15921 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15922 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15923 | |
8072405b JK |
15924 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15925 | even if we error out during the parameters reading below. */ | |
15926 | for (iparams = 0; iparams < nparams; iparams++) | |
15927 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15928 | ||
15929 | iparams = 0; | |
639d11d3 | 15930 | child_die = die->child; |
c906108c SS |
15931 | while (child_die && child_die->tag) |
15932 | { | |
15933 | if (child_die->tag == DW_TAG_formal_parameter) | |
15934 | { | |
3ce3b1ba PA |
15935 | struct type *arg_type; |
15936 | ||
15937 | /* DWARF version 2 has no clean way to discern C++ | |
15938 | static and non-static member functions. G++ helps | |
15939 | GDB by marking the first parameter for non-static | |
15940 | member functions (which is the this pointer) as | |
15941 | artificial. We pass this information to | |
15942 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15943 | ||
15944 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15945 | 4.5 does not yet generate. */ | |
e142c38c | 15946 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15947 | if (attr) |
15948 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
15949 | else | |
9c37b5ae | 15950 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
15951 | arg_type = die_type (child_die, cu); |
15952 | ||
15953 | /* RealView does not mark THIS as const, which the testsuite | |
15954 | expects. GCC marks THIS as const in method definitions, | |
15955 | but not in the class specifications (GCC PR 43053). */ | |
15956 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
15957 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
15958 | { | |
15959 | int is_this = 0; | |
15960 | struct dwarf2_cu *arg_cu = cu; | |
15961 | const char *name = dwarf2_name (child_die, cu); | |
15962 | ||
15963 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
15964 | if (attr) | |
15965 | { | |
15966 | /* If the compiler emits this, use it. */ | |
15967 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
15968 | is_this = 1; | |
15969 | } | |
15970 | else if (name && strcmp (name, "this") == 0) | |
15971 | /* Function definitions will have the argument names. */ | |
15972 | is_this = 1; | |
15973 | else if (name == NULL && iparams == 0) | |
15974 | /* Declarations may not have the names, so like | |
15975 | elsewhere in GDB, assume an artificial first | |
15976 | argument is "this". */ | |
15977 | is_this = 1; | |
15978 | ||
15979 | if (is_this) | |
15980 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
15981 | arg_type, 0); | |
15982 | } | |
15983 | ||
15984 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
15985 | iparams++; |
15986 | } | |
15987 | child_die = sibling_die (child_die); | |
15988 | } | |
15989 | } | |
15990 | ||
76c10ea2 | 15991 | return ftype; |
c906108c SS |
15992 | } |
15993 | ||
f792889a | 15994 | static struct type * |
e7c27a73 | 15995 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15996 | { |
e7c27a73 | 15997 | struct objfile *objfile = cu->objfile; |
0114d602 | 15998 | const char *name = NULL; |
3c8e0968 | 15999 | struct type *this_type, *target_type; |
c906108c | 16000 | |
94af9270 | 16001 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
16002 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
16003 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 16004 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
16005 | target_type = die_type (die, cu); |
16006 | if (target_type != this_type) | |
16007 | TYPE_TARGET_TYPE (this_type) = target_type; | |
16008 | else | |
16009 | { | |
16010 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
16011 | spec and cause infinite loops in GDB. */ | |
16012 | complaint (&symfile_complaints, | |
16013 | _("Self-referential DW_TAG_typedef " | |
16014 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16015 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
16016 | TYPE_TARGET_TYPE (this_type) = NULL; |
16017 | } | |
f792889a | 16018 | return this_type; |
c906108c SS |
16019 | } |
16020 | ||
9b790ce7 UW |
16021 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
16022 | (which may be different from NAME) to the architecture back-end to allow | |
16023 | it to guess the correct format if necessary. */ | |
16024 | ||
16025 | static struct type * | |
16026 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
16027 | const char *name_hint) | |
16028 | { | |
16029 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16030 | const struct floatformat **format; | |
16031 | struct type *type; | |
16032 | ||
16033 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
16034 | if (format) | |
16035 | type = init_float_type (objfile, bits, name, format); | |
16036 | else | |
77b7c781 | 16037 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
16038 | |
16039 | return type; | |
16040 | } | |
16041 | ||
c906108c SS |
16042 | /* Find a representation of a given base type and install |
16043 | it in the TYPE field of the die. */ | |
16044 | ||
f792889a | 16045 | static struct type * |
e7c27a73 | 16046 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16047 | { |
e7c27a73 | 16048 | struct objfile *objfile = cu->objfile; |
c906108c SS |
16049 | struct type *type; |
16050 | struct attribute *attr; | |
19f392bc | 16051 | int encoding = 0, bits = 0; |
15d034d0 | 16052 | const char *name; |
c906108c | 16053 | |
e142c38c | 16054 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
16055 | if (attr) |
16056 | { | |
16057 | encoding = DW_UNSND (attr); | |
16058 | } | |
e142c38c | 16059 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16060 | if (attr) |
16061 | { | |
19f392bc | 16062 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 16063 | } |
39cbfefa | 16064 | name = dwarf2_name (die, cu); |
6ccb9162 | 16065 | if (!name) |
c906108c | 16066 | { |
6ccb9162 UW |
16067 | complaint (&symfile_complaints, |
16068 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 16069 | } |
6ccb9162 UW |
16070 | |
16071 | switch (encoding) | |
c906108c | 16072 | { |
6ccb9162 UW |
16073 | case DW_ATE_address: |
16074 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 16075 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 16076 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
16077 | break; |
16078 | case DW_ATE_boolean: | |
19f392bc | 16079 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
16080 | break; |
16081 | case DW_ATE_complex_float: | |
9b790ce7 | 16082 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 16083 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
16084 | break; |
16085 | case DW_ATE_decimal_float: | |
19f392bc | 16086 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
16087 | break; |
16088 | case DW_ATE_float: | |
9b790ce7 | 16089 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
16090 | break; |
16091 | case DW_ATE_signed: | |
19f392bc | 16092 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
16093 | break; |
16094 | case DW_ATE_unsigned: | |
3b2b8fea TT |
16095 | if (cu->language == language_fortran |
16096 | && name | |
61012eef | 16097 | && startswith (name, "character(")) |
19f392bc UW |
16098 | type = init_character_type (objfile, bits, 1, name); |
16099 | else | |
16100 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
16101 | break; |
16102 | case DW_ATE_signed_char: | |
6e70227d | 16103 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
16104 | || cu->language == language_pascal |
16105 | || cu->language == language_fortran) | |
19f392bc UW |
16106 | type = init_character_type (objfile, bits, 0, name); |
16107 | else | |
16108 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
16109 | break; |
16110 | case DW_ATE_unsigned_char: | |
868a0084 | 16111 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 16112 | || cu->language == language_pascal |
c44af4eb TT |
16113 | || cu->language == language_fortran |
16114 | || cu->language == language_rust) | |
19f392bc UW |
16115 | type = init_character_type (objfile, bits, 1, name); |
16116 | else | |
16117 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 16118 | break; |
75079b2b | 16119 | case DW_ATE_UTF: |
53e710ac PA |
16120 | { |
16121 | gdbarch *arch = get_objfile_arch (objfile); | |
16122 | ||
16123 | if (bits == 16) | |
16124 | type = builtin_type (arch)->builtin_char16; | |
16125 | else if (bits == 32) | |
16126 | type = builtin_type (arch)->builtin_char32; | |
16127 | else | |
16128 | { | |
16129 | complaint (&symfile_complaints, | |
16130 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
16131 | bits); | |
16132 | type = init_integer_type (objfile, bits, 1, name); | |
16133 | } | |
16134 | return set_die_type (die, type, cu); | |
16135 | } | |
75079b2b TT |
16136 | break; |
16137 | ||
6ccb9162 UW |
16138 | default: |
16139 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
16140 | dwarf_type_encoding_name (encoding)); | |
77b7c781 | 16141 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 16142 | break; |
c906108c | 16143 | } |
6ccb9162 | 16144 | |
0114d602 | 16145 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 16146 | TYPE_NOSIGN (type) = 1; |
0114d602 | 16147 | |
f792889a | 16148 | return set_die_type (die, type, cu); |
c906108c SS |
16149 | } |
16150 | ||
80180f79 SA |
16151 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
16152 | resulting value of the attribute into struct bound_prop. | |
16153 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
16154 | ||
16155 | static int | |
16156 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
16157 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
16158 | { | |
16159 | struct dwarf2_property_baton *baton; | |
16160 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
16161 | ||
16162 | if (attr == NULL || prop == NULL) | |
16163 | return 0; | |
16164 | ||
16165 | if (attr_form_is_block (attr)) | |
16166 | { | |
8d749320 | 16167 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
16168 | baton->referenced_type = NULL; |
16169 | baton->locexpr.per_cu = cu->per_cu; | |
16170 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
16171 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
16172 | prop->data.baton = baton; | |
16173 | prop->kind = PROP_LOCEXPR; | |
16174 | gdb_assert (prop->data.baton != NULL); | |
16175 | } | |
16176 | else if (attr_form_is_ref (attr)) | |
16177 | { | |
16178 | struct dwarf2_cu *target_cu = cu; | |
16179 | struct die_info *target_die; | |
16180 | struct attribute *target_attr; | |
16181 | ||
16182 | target_die = follow_die_ref (die, attr, &target_cu); | |
16183 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
16184 | if (target_attr == NULL) |
16185 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
16186 | target_cu); | |
80180f79 SA |
16187 | if (target_attr == NULL) |
16188 | return 0; | |
16189 | ||
df25ebbd | 16190 | switch (target_attr->name) |
80180f79 | 16191 | { |
df25ebbd JB |
16192 | case DW_AT_location: |
16193 | if (attr_form_is_section_offset (target_attr)) | |
16194 | { | |
8d749320 | 16195 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
16196 | baton->referenced_type = die_type (target_die, target_cu); |
16197 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
16198 | prop->data.baton = baton; | |
16199 | prop->kind = PROP_LOCLIST; | |
16200 | gdb_assert (prop->data.baton != NULL); | |
16201 | } | |
16202 | else if (attr_form_is_block (target_attr)) | |
16203 | { | |
8d749320 | 16204 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
16205 | baton->referenced_type = die_type (target_die, target_cu); |
16206 | baton->locexpr.per_cu = cu->per_cu; | |
16207 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
16208 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
16209 | prop->data.baton = baton; | |
16210 | prop->kind = PROP_LOCEXPR; | |
16211 | gdb_assert (prop->data.baton != NULL); | |
16212 | } | |
16213 | else | |
16214 | { | |
16215 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16216 | "dynamic property"); | |
16217 | return 0; | |
16218 | } | |
16219 | break; | |
16220 | case DW_AT_data_member_location: | |
16221 | { | |
16222 | LONGEST offset; | |
16223 | ||
16224 | if (!handle_data_member_location (target_die, target_cu, | |
16225 | &offset)) | |
16226 | return 0; | |
16227 | ||
8d749320 | 16228 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
16229 | baton->referenced_type = read_type_die (target_die->parent, |
16230 | target_cu); | |
df25ebbd JB |
16231 | baton->offset_info.offset = offset; |
16232 | baton->offset_info.type = die_type (target_die, target_cu); | |
16233 | prop->data.baton = baton; | |
16234 | prop->kind = PROP_ADDR_OFFSET; | |
16235 | break; | |
16236 | } | |
80180f79 SA |
16237 | } |
16238 | } | |
16239 | else if (attr_form_is_constant (attr)) | |
16240 | { | |
16241 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
16242 | prop->kind = PROP_CONST; | |
16243 | } | |
16244 | else | |
16245 | { | |
16246 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
16247 | dwarf2_name (die, cu)); | |
16248 | return 0; | |
16249 | } | |
16250 | ||
16251 | return 1; | |
16252 | } | |
16253 | ||
a02abb62 JB |
16254 | /* Read the given DW_AT_subrange DIE. */ |
16255 | ||
f792889a | 16256 | static struct type * |
a02abb62 JB |
16257 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
16258 | { | |
4c9ad8c2 | 16259 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
16260 | struct type *range_type; |
16261 | struct attribute *attr; | |
729efb13 | 16262 | struct dynamic_prop low, high; |
4fae6e18 | 16263 | int low_default_is_valid; |
c451ebe5 | 16264 | int high_bound_is_count = 0; |
15d034d0 | 16265 | const char *name; |
43bbcdc2 | 16266 | LONGEST negative_mask; |
e77813c8 | 16267 | |
4c9ad8c2 TT |
16268 | orig_base_type = die_type (die, cu); |
16269 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
16270 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
16271 | creating the range type, but we use the result of check_typedef | |
16272 | when examining properties of the type. */ | |
16273 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 16274 | |
7e314c57 JK |
16275 | /* The die_type call above may have already set the type for this DIE. */ |
16276 | range_type = get_die_type (die, cu); | |
16277 | if (range_type) | |
16278 | return range_type; | |
16279 | ||
729efb13 SA |
16280 | low.kind = PROP_CONST; |
16281 | high.kind = PROP_CONST; | |
16282 | high.data.const_val = 0; | |
16283 | ||
4fae6e18 JK |
16284 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
16285 | omitting DW_AT_lower_bound. */ | |
16286 | switch (cu->language) | |
6e70227d | 16287 | { |
4fae6e18 JK |
16288 | case language_c: |
16289 | case language_cplus: | |
729efb13 | 16290 | low.data.const_val = 0; |
4fae6e18 JK |
16291 | low_default_is_valid = 1; |
16292 | break; | |
16293 | case language_fortran: | |
729efb13 | 16294 | low.data.const_val = 1; |
4fae6e18 JK |
16295 | low_default_is_valid = 1; |
16296 | break; | |
16297 | case language_d: | |
4fae6e18 | 16298 | case language_objc: |
c44af4eb | 16299 | case language_rust: |
729efb13 | 16300 | low.data.const_val = 0; |
4fae6e18 JK |
16301 | low_default_is_valid = (cu->header.version >= 4); |
16302 | break; | |
16303 | case language_ada: | |
16304 | case language_m2: | |
16305 | case language_pascal: | |
729efb13 | 16306 | low.data.const_val = 1; |
4fae6e18 JK |
16307 | low_default_is_valid = (cu->header.version >= 4); |
16308 | break; | |
16309 | default: | |
729efb13 | 16310 | low.data.const_val = 0; |
4fae6e18 JK |
16311 | low_default_is_valid = 0; |
16312 | break; | |
a02abb62 JB |
16313 | } |
16314 | ||
e142c38c | 16315 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 16316 | if (attr) |
11c1ba78 | 16317 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
16318 | else if (!low_default_is_valid) |
16319 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
16320 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16321 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 16322 | |
e142c38c | 16323 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 16324 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
16325 | { |
16326 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 16327 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 16328 | { |
c451ebe5 SA |
16329 | /* If bounds are constant do the final calculation here. */ |
16330 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
16331 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
16332 | else | |
16333 | high_bound_is_count = 1; | |
c2ff108b | 16334 | } |
e77813c8 PM |
16335 | } |
16336 | ||
16337 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
16338 | without specifying a base type. | |
16339 | In that case, the base type must be set to the type of | |
16340 | the lower bound, upper bound or count, in that order, if any of these | |
16341 | three attributes references an object that has a type. | |
16342 | If no base type is found, the Dwarf-2 specifications say that | |
16343 | a signed integer type of size equal to the size of an address should | |
16344 | be used. | |
16345 | For the following C code: `extern char gdb_int [];' | |
16346 | GCC produces an empty range DIE. | |
16347 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 16348 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
16349 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
16350 | { | |
16351 | struct objfile *objfile = cu->objfile; | |
16352 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16353 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
16354 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
16355 | ||
16356 | /* Test "int", "long int", and "long long int" objfile types, | |
16357 | and select the first one having a size above or equal to the | |
16358 | architecture address size. */ | |
16359 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16360 | base_type = int_type; | |
16361 | else | |
16362 | { | |
16363 | int_type = objfile_type (objfile)->builtin_long; | |
16364 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16365 | base_type = int_type; | |
16366 | else | |
16367 | { | |
16368 | int_type = objfile_type (objfile)->builtin_long_long; | |
16369 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16370 | base_type = int_type; | |
16371 | } | |
16372 | } | |
16373 | } | |
a02abb62 | 16374 | |
dbb9c2b1 JB |
16375 | /* Normally, the DWARF producers are expected to use a signed |
16376 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
16377 | But this is unfortunately not always the case, as witnessed | |
16378 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
16379 | is used instead. To work around that ambiguity, we treat | |
16380 | the bounds as signed, and thus sign-extend their values, when | |
16381 | the base type is signed. */ | |
6e70227d | 16382 | negative_mask = |
66c6502d | 16383 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
16384 | if (low.kind == PROP_CONST |
16385 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
16386 | low.data.const_val |= negative_mask; | |
16387 | if (high.kind == PROP_CONST | |
16388 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
16389 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 16390 | |
729efb13 | 16391 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 16392 | |
c451ebe5 SA |
16393 | if (high_bound_is_count) |
16394 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
16395 | ||
c2ff108b JK |
16396 | /* Ada expects an empty array on no boundary attributes. */ |
16397 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 16398 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 16399 | |
39cbfefa DJ |
16400 | name = dwarf2_name (die, cu); |
16401 | if (name) | |
16402 | TYPE_NAME (range_type) = name; | |
6e70227d | 16403 | |
e142c38c | 16404 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
16405 | if (attr) |
16406 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
16407 | ||
7e314c57 JK |
16408 | set_die_type (die, range_type, cu); |
16409 | ||
16410 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16411 | set_descriptive_type (range_type, die, cu); |
16412 | ||
7e314c57 | 16413 | return range_type; |
a02abb62 | 16414 | } |
6e70227d | 16415 | |
f792889a | 16416 | static struct type * |
81a17f79 JB |
16417 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
16418 | { | |
16419 | struct type *type; | |
81a17f79 | 16420 | |
81a17f79 JB |
16421 | /* For now, we only support the C meaning of an unspecified type: void. */ |
16422 | ||
19f392bc | 16423 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 16424 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 16425 | |
f792889a | 16426 | return set_die_type (die, type, cu); |
81a17f79 | 16427 | } |
a02abb62 | 16428 | |
639d11d3 DC |
16429 | /* Read a single die and all its descendents. Set the die's sibling |
16430 | field to NULL; set other fields in the die correctly, and set all | |
16431 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
16432 | location of the info_ptr after reading all of those dies. PARENT | |
16433 | is the parent of the die in question. */ | |
16434 | ||
16435 | static struct die_info * | |
dee91e82 | 16436 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
16437 | const gdb_byte *info_ptr, |
16438 | const gdb_byte **new_info_ptr, | |
dee91e82 | 16439 | struct die_info *parent) |
639d11d3 DC |
16440 | { |
16441 | struct die_info *die; | |
d521ce57 | 16442 | const gdb_byte *cur_ptr; |
639d11d3 DC |
16443 | int has_children; |
16444 | ||
bf6af496 | 16445 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
16446 | if (die == NULL) |
16447 | { | |
16448 | *new_info_ptr = cur_ptr; | |
16449 | return NULL; | |
16450 | } | |
93311388 | 16451 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
16452 | |
16453 | if (has_children) | |
bf6af496 | 16454 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
16455 | else |
16456 | { | |
16457 | die->child = NULL; | |
16458 | *new_info_ptr = cur_ptr; | |
16459 | } | |
16460 | ||
16461 | die->sibling = NULL; | |
16462 | die->parent = parent; | |
16463 | return die; | |
16464 | } | |
16465 | ||
16466 | /* Read a die, all of its descendents, and all of its siblings; set | |
16467 | all of the fields of all of the dies correctly. Arguments are as | |
16468 | in read_die_and_children. */ | |
16469 | ||
16470 | static struct die_info * | |
bf6af496 | 16471 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
16472 | const gdb_byte *info_ptr, |
16473 | const gdb_byte **new_info_ptr, | |
bf6af496 | 16474 | struct die_info *parent) |
639d11d3 DC |
16475 | { |
16476 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 16477 | const gdb_byte *cur_ptr; |
639d11d3 | 16478 | |
c906108c | 16479 | cur_ptr = info_ptr; |
639d11d3 DC |
16480 | first_die = last_sibling = NULL; |
16481 | ||
16482 | while (1) | |
c906108c | 16483 | { |
639d11d3 | 16484 | struct die_info *die |
dee91e82 | 16485 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 16486 | |
1d325ec1 | 16487 | if (die == NULL) |
c906108c | 16488 | { |
639d11d3 DC |
16489 | *new_info_ptr = cur_ptr; |
16490 | return first_die; | |
c906108c | 16491 | } |
1d325ec1 DJ |
16492 | |
16493 | if (!first_die) | |
16494 | first_die = die; | |
c906108c | 16495 | else |
1d325ec1 DJ |
16496 | last_sibling->sibling = die; |
16497 | ||
16498 | last_sibling = die; | |
c906108c | 16499 | } |
c906108c SS |
16500 | } |
16501 | ||
bf6af496 DE |
16502 | /* Read a die, all of its descendents, and all of its siblings; set |
16503 | all of the fields of all of the dies correctly. Arguments are as | |
16504 | in read_die_and_children. | |
16505 | This the main entry point for reading a DIE and all its children. */ | |
16506 | ||
16507 | static struct die_info * | |
16508 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
16509 | const gdb_byte *info_ptr, |
16510 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
16511 | struct die_info *parent) |
16512 | { | |
16513 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
16514 | new_info_ptr, parent); | |
16515 | ||
b4f54984 | 16516 | if (dwarf_die_debug) |
bf6af496 DE |
16517 | { |
16518 | fprintf_unfiltered (gdb_stdlog, | |
16519 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16520 | get_section_name (reader->die_section), |
bf6af496 DE |
16521 | (unsigned) (info_ptr - reader->die_section->buffer), |
16522 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16523 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
16524 | } |
16525 | ||
16526 | return die; | |
16527 | } | |
16528 | ||
3019eac3 DE |
16529 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
16530 | attributes. | |
16531 | The caller is responsible for filling in the extra attributes | |
16532 | and updating (*DIEP)->num_attrs. | |
16533 | Set DIEP to point to a newly allocated die with its information, | |
16534 | except for its child, sibling, and parent fields. | |
16535 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 16536 | |
d521ce57 | 16537 | static const gdb_byte * |
3019eac3 | 16538 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 16539 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 16540 | int *has_children, int num_extra_attrs) |
93311388 | 16541 | { |
b64f50a1 | 16542 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
16543 | struct abbrev_info *abbrev; |
16544 | struct die_info *die; | |
16545 | struct dwarf2_cu *cu = reader->cu; | |
16546 | bfd *abfd = reader->abfd; | |
16547 | ||
9c541725 | 16548 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
16549 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16550 | info_ptr += bytes_read; | |
16551 | if (!abbrev_number) | |
16552 | { | |
16553 | *diep = NULL; | |
16554 | *has_children = 0; | |
16555 | return info_ptr; | |
16556 | } | |
16557 | ||
433df2d4 | 16558 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 16559 | if (!abbrev) |
348e048f DE |
16560 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
16561 | abbrev_number, | |
16562 | bfd_get_filename (abfd)); | |
16563 | ||
3019eac3 | 16564 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 16565 | die->sect_off = sect_off; |
93311388 DE |
16566 | die->tag = abbrev->tag; |
16567 | die->abbrev = abbrev_number; | |
16568 | ||
3019eac3 DE |
16569 | /* Make the result usable. |
16570 | The caller needs to update num_attrs after adding the extra | |
16571 | attributes. */ | |
93311388 DE |
16572 | die->num_attrs = abbrev->num_attrs; |
16573 | ||
16574 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
16575 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
16576 | info_ptr); | |
93311388 DE |
16577 | |
16578 | *diep = die; | |
16579 | *has_children = abbrev->has_children; | |
16580 | return info_ptr; | |
16581 | } | |
16582 | ||
3019eac3 DE |
16583 | /* Read a die and all its attributes. |
16584 | Set DIEP to point to a newly allocated die with its information, | |
16585 | except for its child, sibling, and parent fields. | |
16586 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
16587 | ||
d521ce57 | 16588 | static const gdb_byte * |
3019eac3 | 16589 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 16590 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
16591 | int *has_children) |
16592 | { | |
d521ce57 | 16593 | const gdb_byte *result; |
bf6af496 DE |
16594 | |
16595 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
16596 | ||
b4f54984 | 16597 | if (dwarf_die_debug) |
bf6af496 DE |
16598 | { |
16599 | fprintf_unfiltered (gdb_stdlog, | |
16600 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16601 | get_section_name (reader->die_section), |
bf6af496 DE |
16602 | (unsigned) (info_ptr - reader->die_section->buffer), |
16603 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16604 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
16605 | } |
16606 | ||
16607 | return result; | |
3019eac3 | 16608 | } |
433df2d4 DE |
16609 | \f |
16610 | /* Abbreviation tables. | |
3019eac3 | 16611 | |
433df2d4 | 16612 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
16613 | stored in a separate .debug_abbrev section. Before we read any |
16614 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
16615 | in a hash table. */ |
16616 | ||
16617 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
16618 | ||
16619 | static struct abbrev_info * | |
16620 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
16621 | { | |
16622 | struct abbrev_info *abbrev; | |
16623 | ||
8d749320 | 16624 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 16625 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 16626 | |
433df2d4 DE |
16627 | return abbrev; |
16628 | } | |
16629 | ||
16630 | /* Add an abbreviation to the table. */ | |
c906108c SS |
16631 | |
16632 | static void | |
433df2d4 DE |
16633 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
16634 | unsigned int abbrev_number, | |
16635 | struct abbrev_info *abbrev) | |
16636 | { | |
16637 | unsigned int hash_number; | |
16638 | ||
16639 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16640 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
16641 | abbrev_table->abbrevs[hash_number] = abbrev; | |
16642 | } | |
dee91e82 | 16643 | |
433df2d4 DE |
16644 | /* Look up an abbrev in the table. |
16645 | Returns NULL if the abbrev is not found. */ | |
16646 | ||
16647 | static struct abbrev_info * | |
16648 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
16649 | unsigned int abbrev_number) | |
c906108c | 16650 | { |
433df2d4 DE |
16651 | unsigned int hash_number; |
16652 | struct abbrev_info *abbrev; | |
16653 | ||
16654 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16655 | abbrev = abbrev_table->abbrevs[hash_number]; | |
16656 | ||
16657 | while (abbrev) | |
16658 | { | |
16659 | if (abbrev->number == abbrev_number) | |
16660 | return abbrev; | |
16661 | abbrev = abbrev->next; | |
16662 | } | |
16663 | return NULL; | |
16664 | } | |
16665 | ||
16666 | /* Read in an abbrev table. */ | |
16667 | ||
16668 | static struct abbrev_table * | |
16669 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 16670 | sect_offset sect_off) |
433df2d4 DE |
16671 | { |
16672 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 16673 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 16674 | struct abbrev_table *abbrev_table; |
d521ce57 | 16675 | const gdb_byte *abbrev_ptr; |
c906108c SS |
16676 | struct abbrev_info *cur_abbrev; |
16677 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 16678 | unsigned int abbrev_form; |
f3dd6933 DJ |
16679 | struct attr_abbrev *cur_attrs; |
16680 | unsigned int allocated_attrs; | |
c906108c | 16681 | |
70ba0933 | 16682 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 16683 | abbrev_table->sect_off = sect_off; |
433df2d4 | 16684 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
16685 | abbrev_table->abbrevs = |
16686 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
16687 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
16688 | memset (abbrev_table->abbrevs, 0, |
16689 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 16690 | |
433df2d4 | 16691 | dwarf2_read_section (objfile, section); |
9c541725 | 16692 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
16693 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16694 | abbrev_ptr += bytes_read; | |
16695 | ||
f3dd6933 | 16696 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 16697 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 16698 | |
0963b4bd | 16699 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
16700 | while (abbrev_number) |
16701 | { | |
433df2d4 | 16702 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
16703 | |
16704 | /* read in abbrev header */ | |
16705 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
16706 | cur_abbrev->tag |
16707 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
16708 | abbrev_ptr += bytes_read; |
16709 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
16710 | abbrev_ptr += 1; | |
16711 | ||
16712 | /* now read in declarations */ | |
22d2f3ab | 16713 | for (;;) |
c906108c | 16714 | { |
43988095 JK |
16715 | LONGEST implicit_const; |
16716 | ||
22d2f3ab JK |
16717 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16718 | abbrev_ptr += bytes_read; | |
16719 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16720 | abbrev_ptr += bytes_read; | |
43988095 JK |
16721 | if (abbrev_form == DW_FORM_implicit_const) |
16722 | { | |
16723 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
16724 | &bytes_read); | |
16725 | abbrev_ptr += bytes_read; | |
16726 | } | |
16727 | else | |
16728 | { | |
16729 | /* Initialize it due to a false compiler warning. */ | |
16730 | implicit_const = -1; | |
16731 | } | |
22d2f3ab JK |
16732 | |
16733 | if (abbrev_name == 0) | |
16734 | break; | |
16735 | ||
f3dd6933 | 16736 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 16737 | { |
f3dd6933 DJ |
16738 | allocated_attrs += ATTR_ALLOC_CHUNK; |
16739 | cur_attrs | |
224c3ddb | 16740 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 16741 | } |
ae038cb0 | 16742 | |
aead7601 SM |
16743 | cur_attrs[cur_abbrev->num_attrs].name |
16744 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 16745 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 16746 | = (enum dwarf_form) abbrev_form; |
43988095 | 16747 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 16748 | ++cur_abbrev->num_attrs; |
c906108c SS |
16749 | } |
16750 | ||
8d749320 SM |
16751 | cur_abbrev->attrs = |
16752 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
16753 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
16754 | memcpy (cur_abbrev->attrs, cur_attrs, |
16755 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
16756 | ||
433df2d4 | 16757 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
16758 | |
16759 | /* Get next abbreviation. | |
16760 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
16761 | always properly terminated with an abbrev number of 0. |
16762 | Exit loop if we encounter an abbreviation which we have | |
16763 | already read (which means we are about to read the abbreviations | |
16764 | for the next compile unit) or if the end of the abbreviation | |
16765 | table is reached. */ | |
433df2d4 | 16766 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
16767 | break; |
16768 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16769 | abbrev_ptr += bytes_read; | |
433df2d4 | 16770 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
16771 | break; |
16772 | } | |
f3dd6933 DJ |
16773 | |
16774 | xfree (cur_attrs); | |
433df2d4 | 16775 | return abbrev_table; |
c906108c SS |
16776 | } |
16777 | ||
433df2d4 | 16778 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 16779 | |
c906108c | 16780 | static void |
433df2d4 | 16781 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 16782 | { |
433df2d4 DE |
16783 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
16784 | xfree (abbrev_table); | |
c906108c SS |
16785 | } |
16786 | ||
f4dc4d17 DE |
16787 | /* Same as abbrev_table_free but as a cleanup. |
16788 | We pass in a pointer to the pointer to the table so that we can | |
16789 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 16790 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
16791 | |
16792 | static void | |
16793 | abbrev_table_free_cleanup (void *table_ptr) | |
16794 | { | |
9a3c8263 | 16795 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
16796 | |
16797 | if (*abbrev_table_ptr != NULL) | |
16798 | abbrev_table_free (*abbrev_table_ptr); | |
16799 | *abbrev_table_ptr = NULL; | |
16800 | } | |
16801 | ||
433df2d4 DE |
16802 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
16803 | ||
16804 | static void | |
16805 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
16806 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 16807 | { |
433df2d4 | 16808 | cu->abbrev_table = |
9c541725 | 16809 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 16810 | } |
c906108c | 16811 | |
433df2d4 | 16812 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 16813 | |
433df2d4 DE |
16814 | static void |
16815 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
16816 | { | |
9a3c8263 | 16817 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 16818 | |
a2ce51a0 DE |
16819 | if (cu->abbrev_table != NULL) |
16820 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
16821 | /* Set this to NULL so that we SEGV if we try to read it later, |
16822 | and also because free_comp_unit verifies this is NULL. */ | |
16823 | cu->abbrev_table = NULL; | |
16824 | } | |
16825 | \f | |
72bf9492 DJ |
16826 | /* Returns nonzero if TAG represents a type that we might generate a partial |
16827 | symbol for. */ | |
16828 | ||
16829 | static int | |
16830 | is_type_tag_for_partial (int tag) | |
16831 | { | |
16832 | switch (tag) | |
16833 | { | |
16834 | #if 0 | |
16835 | /* Some types that would be reasonable to generate partial symbols for, | |
16836 | that we don't at present. */ | |
16837 | case DW_TAG_array_type: | |
16838 | case DW_TAG_file_type: | |
16839 | case DW_TAG_ptr_to_member_type: | |
16840 | case DW_TAG_set_type: | |
16841 | case DW_TAG_string_type: | |
16842 | case DW_TAG_subroutine_type: | |
16843 | #endif | |
16844 | case DW_TAG_base_type: | |
16845 | case DW_TAG_class_type: | |
680b30c7 | 16846 | case DW_TAG_interface_type: |
72bf9492 DJ |
16847 | case DW_TAG_enumeration_type: |
16848 | case DW_TAG_structure_type: | |
16849 | case DW_TAG_subrange_type: | |
16850 | case DW_TAG_typedef: | |
16851 | case DW_TAG_union_type: | |
16852 | return 1; | |
16853 | default: | |
16854 | return 0; | |
16855 | } | |
16856 | } | |
16857 | ||
16858 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
16859 | ||
16860 | static struct partial_die_info * | |
dee91e82 | 16861 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 16862 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 16863 | { |
dee91e82 | 16864 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16865 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
16866 | struct partial_die_info *part_die; |
16867 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
16868 | struct abbrev_info *abbrev; | |
16869 | unsigned int bytes_read; | |
5afb4e99 | 16870 | unsigned int load_all = 0; |
72bf9492 DJ |
16871 | int nesting_level = 1; |
16872 | ||
16873 | parent_die = NULL; | |
16874 | last_die = NULL; | |
16875 | ||
7adf1e79 DE |
16876 | gdb_assert (cu->per_cu != NULL); |
16877 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16878 | load_all = 1; |
16879 | ||
72bf9492 DJ |
16880 | cu->partial_dies |
16881 | = htab_create_alloc_ex (cu->header.length / 12, | |
16882 | partial_die_hash, | |
16883 | partial_die_eq, | |
16884 | NULL, | |
16885 | &cu->comp_unit_obstack, | |
16886 | hashtab_obstack_allocate, | |
16887 | dummy_obstack_deallocate); | |
16888 | ||
8d749320 | 16889 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16890 | |
16891 | while (1) | |
16892 | { | |
16893 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16894 | ||
16895 | /* A NULL abbrev means the end of a series of children. */ | |
16896 | if (abbrev == NULL) | |
16897 | { | |
16898 | if (--nesting_level == 0) | |
16899 | { | |
16900 | /* PART_DIE was probably the last thing allocated on the | |
16901 | comp_unit_obstack, so we could call obstack_free | |
16902 | here. We don't do that because the waste is small, | |
16903 | and will be cleaned up when we're done with this | |
16904 | compilation unit. This way, we're also more robust | |
16905 | against other users of the comp_unit_obstack. */ | |
16906 | return first_die; | |
16907 | } | |
16908 | info_ptr += bytes_read; | |
16909 | last_die = parent_die; | |
16910 | parent_die = parent_die->die_parent; | |
16911 | continue; | |
16912 | } | |
16913 | ||
98bfdba5 PA |
16914 | /* Check for template arguments. We never save these; if |
16915 | they're seen, we just mark the parent, and go on our way. */ | |
16916 | if (parent_die != NULL | |
16917 | && cu->language == language_cplus | |
16918 | && (abbrev->tag == DW_TAG_template_type_param | |
16919 | || abbrev->tag == DW_TAG_template_value_param)) | |
16920 | { | |
16921 | parent_die->has_template_arguments = 1; | |
16922 | ||
16923 | if (!load_all) | |
16924 | { | |
16925 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16926 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16927 | continue; |
16928 | } | |
16929 | } | |
16930 | ||
0d99eb77 | 16931 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16932 | Skip their other children. */ |
16933 | if (!load_all | |
16934 | && cu->language == language_cplus | |
16935 | && parent_die != NULL | |
16936 | && parent_die->tag == DW_TAG_subprogram) | |
16937 | { | |
dee91e82 | 16938 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16939 | continue; |
16940 | } | |
16941 | ||
5afb4e99 DJ |
16942 | /* Check whether this DIE is interesting enough to save. Normally |
16943 | we would not be interested in members here, but there may be | |
16944 | later variables referencing them via DW_AT_specification (for | |
16945 | static members). */ | |
16946 | if (!load_all | |
16947 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16948 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
16949 | && abbrev->tag != DW_TAG_enumerator |
16950 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 16951 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 16952 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 16953 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 16954 | && abbrev->tag != DW_TAG_module |
95554aad | 16955 | && abbrev->tag != DW_TAG_member |
74921315 KS |
16956 | && abbrev->tag != DW_TAG_imported_unit |
16957 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
16958 | { |
16959 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16960 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
16961 | continue; |
16962 | } | |
16963 | ||
dee91e82 DE |
16964 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
16965 | info_ptr); | |
72bf9492 DJ |
16966 | |
16967 | /* This two-pass algorithm for processing partial symbols has a | |
16968 | high cost in cache pressure. Thus, handle some simple cases | |
16969 | here which cover the majority of C partial symbols. DIEs | |
16970 | which neither have specification tags in them, nor could have | |
16971 | specification tags elsewhere pointing at them, can simply be | |
16972 | processed and discarded. | |
16973 | ||
16974 | This segment is also optional; scan_partial_symbols and | |
16975 | add_partial_symbol will handle these DIEs if we chain | |
16976 | them in normally. When compilers which do not emit large | |
16977 | quantities of duplicate debug information are more common, | |
16978 | this code can probably be removed. */ | |
16979 | ||
16980 | /* Any complete simple types at the top level (pretty much all | |
16981 | of them, for a language without namespaces), can be processed | |
16982 | directly. */ | |
16983 | if (parent_die == NULL | |
16984 | && part_die->has_specification == 0 | |
16985 | && part_die->is_declaration == 0 | |
d8228535 | 16986 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
16987 | || part_die->tag == DW_TAG_base_type |
16988 | || part_die->tag == DW_TAG_subrange_type)) | |
16989 | { | |
16990 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 16991 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16992 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 16993 | &objfile->static_psymbols, |
1762568f | 16994 | 0, cu->language, objfile); |
dee91e82 | 16995 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16996 | continue; |
16997 | } | |
16998 | ||
d8228535 JK |
16999 | /* The exception for DW_TAG_typedef with has_children above is |
17000 | a workaround of GCC PR debug/47510. In the case of this complaint | |
17001 | type_name_no_tag_or_error will error on such types later. | |
17002 | ||
17003 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
17004 | it could not find the child DIEs referenced later, this is checked | |
17005 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
17006 | ||
17007 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
17008 | complaint (&symfile_complaints, | |
17009 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
17010 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 17011 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 17012 | |
72bf9492 DJ |
17013 | /* If we're at the second level, and we're an enumerator, and |
17014 | our parent has no specification (meaning possibly lives in a | |
17015 | namespace elsewhere), then we can add the partial symbol now | |
17016 | instead of queueing it. */ | |
17017 | if (part_die->tag == DW_TAG_enumerator | |
17018 | && parent_die != NULL | |
17019 | && parent_die->die_parent == NULL | |
17020 | && parent_die->tag == DW_TAG_enumeration_type | |
17021 | && parent_die->has_specification == 0) | |
17022 | { | |
17023 | if (part_die->name == NULL) | |
3e43a32a MS |
17024 | complaint (&symfile_complaints, |
17025 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 17026 | else if (building_psymtab) |
04a679b8 | 17027 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 17028 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 17029 | cu->language == language_cplus |
bb5ed363 DE |
17030 | ? &objfile->global_psymbols |
17031 | : &objfile->static_psymbols, | |
1762568f | 17032 | 0, cu->language, objfile); |
72bf9492 | 17033 | |
dee91e82 | 17034 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
17035 | continue; |
17036 | } | |
17037 | ||
17038 | /* We'll save this DIE so link it in. */ | |
17039 | part_die->die_parent = parent_die; | |
17040 | part_die->die_sibling = NULL; | |
17041 | part_die->die_child = NULL; | |
17042 | ||
17043 | if (last_die && last_die == parent_die) | |
17044 | last_die->die_child = part_die; | |
17045 | else if (last_die) | |
17046 | last_die->die_sibling = part_die; | |
17047 | ||
17048 | last_die = part_die; | |
17049 | ||
17050 | if (first_die == NULL) | |
17051 | first_die = part_die; | |
17052 | ||
17053 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
17054 | find interesting need to be in the hash table, because we | |
17055 | also have the parent/sibling/child chains; only those that we | |
17056 | might refer to by offset later during partial symbol reading. | |
17057 | ||
17058 | For now this means things that might have be the target of a | |
17059 | DW_AT_specification, DW_AT_abstract_origin, or | |
17060 | DW_AT_extension. DW_AT_extension will refer only to | |
17061 | namespaces; DW_AT_abstract_origin refers to functions (and | |
17062 | many things under the function DIE, but we do not recurse | |
17063 | into function DIEs during partial symbol reading) and | |
17064 | possibly variables as well; DW_AT_specification refers to | |
17065 | declarations. Declarations ought to have the DW_AT_declaration | |
17066 | flag. It happens that GCC forgets to put it in sometimes, but | |
17067 | only for functions, not for types. | |
17068 | ||
17069 | Adding more things than necessary to the hash table is harmless | |
17070 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
17071 | wasted time in find_partial_die, when we reread the compilation |
17072 | unit with load_all_dies set. */ | |
72bf9492 | 17073 | |
5afb4e99 | 17074 | if (load_all |
72929c62 | 17075 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 17076 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
17077 | || abbrev->tag == DW_TAG_variable |
17078 | || abbrev->tag == DW_TAG_namespace | |
17079 | || part_die->is_declaration) | |
17080 | { | |
17081 | void **slot; | |
17082 | ||
17083 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
17084 | to_underlying (part_die->sect_off), |
17085 | INSERT); | |
72bf9492 DJ |
17086 | *slot = part_die; |
17087 | } | |
17088 | ||
8d749320 | 17089 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
17090 | |
17091 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 17092 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
17093 | languages we have to, so that we can get at method physnames |
17094 | to infer fully qualified class names, for DW_AT_specification, | |
17095 | and for C++ template arguments. For C++, we also look one level | |
17096 | inside functions to find template arguments (if the name of the | |
17097 | function does not already contain the template arguments). | |
bc30ff58 JB |
17098 | |
17099 | For Ada, we need to scan the children of subprograms and lexical | |
17100 | blocks as well because Ada allows the definition of nested | |
17101 | entities that could be interesting for the debugger, such as | |
17102 | nested subprograms for instance. */ | |
72bf9492 | 17103 | if (last_die->has_children |
5afb4e99 DJ |
17104 | && (load_all |
17105 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 17106 | || last_die->tag == DW_TAG_module |
72bf9492 | 17107 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
17108 | || (cu->language == language_cplus |
17109 | && last_die->tag == DW_TAG_subprogram | |
17110 | && (last_die->name == NULL | |
17111 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
17112 | || (cu->language != language_c |
17113 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 17114 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 17115 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
17116 | || last_die->tag == DW_TAG_union_type)) |
17117 | || (cu->language == language_ada | |
17118 | && (last_die->tag == DW_TAG_subprogram | |
17119 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
17120 | { |
17121 | nesting_level++; | |
17122 | parent_die = last_die; | |
17123 | continue; | |
17124 | } | |
17125 | ||
17126 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17127 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
17128 | |
17129 | /* Back to the top, do it again. */ | |
17130 | } | |
17131 | } | |
17132 | ||
c906108c SS |
17133 | /* Read a minimal amount of information into the minimal die structure. */ |
17134 | ||
d521ce57 | 17135 | static const gdb_byte * |
dee91e82 DE |
17136 | read_partial_die (const struct die_reader_specs *reader, |
17137 | struct partial_die_info *part_die, | |
17138 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 17139 | const gdb_byte *info_ptr) |
c906108c | 17140 | { |
dee91e82 | 17141 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 17142 | struct objfile *objfile = cu->objfile; |
d521ce57 | 17143 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 17144 | unsigned int i; |
c906108c | 17145 | struct attribute attr; |
c5aa993b | 17146 | int has_low_pc_attr = 0; |
c906108c | 17147 | int has_high_pc_attr = 0; |
91da1414 | 17148 | int high_pc_relative = 0; |
c906108c | 17149 | |
72bf9492 | 17150 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 17151 | |
9c541725 | 17152 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
17153 | |
17154 | info_ptr += abbrev_len; | |
17155 | ||
17156 | if (abbrev == NULL) | |
17157 | return info_ptr; | |
17158 | ||
c906108c SS |
17159 | part_die->tag = abbrev->tag; |
17160 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
17161 | |
17162 | for (i = 0; i < abbrev->num_attrs; ++i) | |
17163 | { | |
dee91e82 | 17164 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
17165 | |
17166 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 17167 | partial symbol table. */ |
c906108c SS |
17168 | switch (attr.name) |
17169 | { | |
17170 | case DW_AT_name: | |
71c25dea TT |
17171 | switch (part_die->tag) |
17172 | { | |
17173 | case DW_TAG_compile_unit: | |
95554aad | 17174 | case DW_TAG_partial_unit: |
348e048f | 17175 | case DW_TAG_type_unit: |
71c25dea TT |
17176 | /* Compilation units have a DW_AT_name that is a filename, not |
17177 | a source language identifier. */ | |
17178 | case DW_TAG_enumeration_type: | |
17179 | case DW_TAG_enumerator: | |
17180 | /* These tags always have simple identifiers already; no need | |
17181 | to canonicalize them. */ | |
17182 | part_die->name = DW_STRING (&attr); | |
17183 | break; | |
17184 | default: | |
17185 | part_die->name | |
17186 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 17187 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
17188 | break; |
17189 | } | |
c906108c | 17190 | break; |
31ef98ae | 17191 | case DW_AT_linkage_name: |
c906108c | 17192 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
17193 | /* Note that both forms of linkage name might appear. We |
17194 | assume they will be the same, and we only store the last | |
17195 | one we see. */ | |
94af9270 KS |
17196 | if (cu->language == language_ada) |
17197 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 17198 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
17199 | break; |
17200 | case DW_AT_low_pc: | |
17201 | has_low_pc_attr = 1; | |
31aa7e4e | 17202 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
17203 | break; |
17204 | case DW_AT_high_pc: | |
17205 | has_high_pc_attr = 1; | |
31aa7e4e JB |
17206 | part_die->highpc = attr_value_as_address (&attr); |
17207 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
17208 | high_pc_relative = 1; | |
c906108c SS |
17209 | break; |
17210 | case DW_AT_location: | |
0963b4bd | 17211 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
17212 | if (attr_form_is_block (&attr)) |
17213 | { | |
95554aad | 17214 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 17215 | } |
3690dd37 | 17216 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 17217 | { |
4d3c2250 | 17218 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
17219 | } |
17220 | else | |
17221 | { | |
4d3c2250 KB |
17222 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
17223 | "partial symbol information"); | |
8e19ed76 | 17224 | } |
c906108c | 17225 | break; |
c906108c SS |
17226 | case DW_AT_external: |
17227 | part_die->is_external = DW_UNSND (&attr); | |
17228 | break; | |
17229 | case DW_AT_declaration: | |
17230 | part_die->is_declaration = DW_UNSND (&attr); | |
17231 | break; | |
17232 | case DW_AT_type: | |
17233 | part_die->has_type = 1; | |
17234 | break; | |
17235 | case DW_AT_abstract_origin: | |
17236 | case DW_AT_specification: | |
72bf9492 DJ |
17237 | case DW_AT_extension: |
17238 | part_die->has_specification = 1; | |
c764a876 | 17239 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17240 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17241 | || cu->per_cu->is_dwz); | |
c906108c SS |
17242 | break; |
17243 | case DW_AT_sibling: | |
17244 | /* Ignore absolute siblings, they might point outside of | |
17245 | the current compile unit. */ | |
17246 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
17247 | complaint (&symfile_complaints, |
17248 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 17249 | else |
b9502d3f | 17250 | { |
9c541725 PA |
17251 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
17252 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
17253 | |
17254 | if (sibling_ptr < info_ptr) | |
17255 | complaint (&symfile_complaints, | |
17256 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
17257 | else if (sibling_ptr > reader->buffer_end) |
17258 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
17259 | else |
17260 | part_die->sibling = sibling_ptr; | |
17261 | } | |
c906108c | 17262 | break; |
fa4028e9 JB |
17263 | case DW_AT_byte_size: |
17264 | part_die->has_byte_size = 1; | |
17265 | break; | |
ff908ebf AW |
17266 | case DW_AT_const_value: |
17267 | part_die->has_const_value = 1; | |
17268 | break; | |
68511cec CES |
17269 | case DW_AT_calling_convention: |
17270 | /* DWARF doesn't provide a way to identify a program's source-level | |
17271 | entry point. DW_AT_calling_convention attributes are only meant | |
17272 | to describe functions' calling conventions. | |
17273 | ||
17274 | However, because it's a necessary piece of information in | |
0c1b455e TT |
17275 | Fortran, and before DWARF 4 DW_CC_program was the only |
17276 | piece of debugging information whose definition refers to | |
17277 | a 'main program' at all, several compilers marked Fortran | |
17278 | main programs with DW_CC_program --- even when those | |
17279 | functions use the standard calling conventions. | |
17280 | ||
17281 | Although DWARF now specifies a way to provide this | |
17282 | information, we support this practice for backward | |
17283 | compatibility. */ | |
68511cec | 17284 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
17285 | && cu->language == language_fortran) |
17286 | part_die->main_subprogram = 1; | |
68511cec | 17287 | break; |
481860b3 GB |
17288 | case DW_AT_inline: |
17289 | if (DW_UNSND (&attr) == DW_INL_inlined | |
17290 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
17291 | part_die->may_be_inlined = 1; | |
17292 | break; | |
95554aad TT |
17293 | |
17294 | case DW_AT_import: | |
17295 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 17296 | { |
9c541725 | 17297 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17298 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17299 | || cu->per_cu->is_dwz); | |
17300 | } | |
95554aad TT |
17301 | break; |
17302 | ||
0c1b455e TT |
17303 | case DW_AT_main_subprogram: |
17304 | part_die->main_subprogram = DW_UNSND (&attr); | |
17305 | break; | |
17306 | ||
c906108c SS |
17307 | default: |
17308 | break; | |
17309 | } | |
17310 | } | |
17311 | ||
91da1414 MW |
17312 | if (high_pc_relative) |
17313 | part_die->highpc += part_die->lowpc; | |
17314 | ||
9373cf26 JK |
17315 | if (has_low_pc_attr && has_high_pc_attr) |
17316 | { | |
17317 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
17318 | eliminate duplicate copies of functions and vtables and such. | |
17319 | The linker will arbitrarily choose one and discard the others. | |
17320 | The AT_*_pc values for such functions refer to local labels in | |
17321 | these sections. If the section from that file was discarded, the | |
17322 | labels are not in the output, so the relocs get a value of 0. | |
17323 | If this is a discarded function, mark the pc bounds as invalid, | |
17324 | so that GDB will ignore it. */ | |
17325 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
17326 | { | |
bb5ed363 | 17327 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17328 | |
17329 | complaint (&symfile_complaints, | |
17330 | _("DW_AT_low_pc %s is zero " | |
17331 | "for DIE at 0x%x [in module %s]"), | |
17332 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 17333 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
17334 | } |
17335 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
17336 | else if (part_die->lowpc >= part_die->highpc) | |
17337 | { | |
bb5ed363 | 17338 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17339 | |
17340 | complaint (&symfile_complaints, | |
17341 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
17342 | "for DIE at 0x%x [in module %s]"), | |
17343 | paddress (gdbarch, part_die->lowpc), | |
17344 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
17345 | to_underlying (part_die->sect_off), |
17346 | objfile_name (objfile)); | |
9373cf26 JK |
17347 | } |
17348 | else | |
17349 | part_die->has_pc_info = 1; | |
17350 | } | |
85cbf3d3 | 17351 | |
c906108c SS |
17352 | return info_ptr; |
17353 | } | |
17354 | ||
72bf9492 DJ |
17355 | /* Find a cached partial DIE at OFFSET in CU. */ |
17356 | ||
17357 | static struct partial_die_info * | |
9c541725 | 17358 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
17359 | { |
17360 | struct partial_die_info *lookup_die = NULL; | |
17361 | struct partial_die_info part_die; | |
17362 | ||
9c541725 | 17363 | part_die.sect_off = sect_off; |
9a3c8263 SM |
17364 | lookup_die = ((struct partial_die_info *) |
17365 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 17366 | to_underlying (sect_off))); |
72bf9492 | 17367 | |
72bf9492 DJ |
17368 | return lookup_die; |
17369 | } | |
17370 | ||
348e048f DE |
17371 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
17372 | except in the case of .debug_types DIEs which do not reference | |
17373 | outside their CU (they do however referencing other types via | |
55f1336d | 17374 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
17375 | |
17376 | static struct partial_die_info * | |
9c541725 | 17377 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 17378 | { |
bb5ed363 | 17379 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
17380 | struct dwarf2_per_cu_data *per_cu = NULL; |
17381 | struct partial_die_info *pd = NULL; | |
72bf9492 | 17382 | |
36586728 | 17383 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 17384 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 17385 | { |
9c541725 | 17386 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
17387 | if (pd != NULL) |
17388 | return pd; | |
0d99eb77 DE |
17389 | /* We missed recording what we needed. |
17390 | Load all dies and try again. */ | |
17391 | per_cu = cu->per_cu; | |
5afb4e99 | 17392 | } |
0d99eb77 DE |
17393 | else |
17394 | { | |
17395 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 17396 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 17397 | { |
9c541725 PA |
17398 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
17399 | " external reference to offset 0x%x [in module %s].\n"), | |
17400 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
17401 | bfd_get_filename (objfile->obfd)); |
17402 | } | |
9c541725 | 17403 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 17404 | objfile); |
72bf9492 | 17405 | |
0d99eb77 DE |
17406 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
17407 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 17408 | |
0d99eb77 | 17409 | per_cu->cu->last_used = 0; |
9c541725 | 17410 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 17411 | } |
5afb4e99 | 17412 | |
dee91e82 DE |
17413 | /* If we didn't find it, and not all dies have been loaded, |
17414 | load them all and try again. */ | |
17415 | ||
5afb4e99 DJ |
17416 | if (pd == NULL && per_cu->load_all_dies == 0) |
17417 | { | |
5afb4e99 | 17418 | per_cu->load_all_dies = 1; |
fd820528 DE |
17419 | |
17420 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
17421 | THIS_CU->cu may already be in use. So we can't just free it and | |
17422 | replace its DIEs with the ones we read in. Instead, we leave those | |
17423 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
17424 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
17425 | set. */ | |
dee91e82 | 17426 | load_partial_comp_unit (per_cu); |
5afb4e99 | 17427 | |
9c541725 | 17428 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
17429 | } |
17430 | ||
17431 | if (pd == NULL) | |
17432 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
17433 | _("could not find partial DIE 0x%x " |
17434 | "in cache [from module %s]\n"), | |
9c541725 | 17435 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 17436 | return pd; |
72bf9492 DJ |
17437 | } |
17438 | ||
abc72ce4 DE |
17439 | /* See if we can figure out if the class lives in a namespace. We do |
17440 | this by looking for a member function; its demangled name will | |
17441 | contain namespace info, if there is any. */ | |
17442 | ||
17443 | static void | |
17444 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
17445 | struct dwarf2_cu *cu) | |
17446 | { | |
17447 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
17448 | what template types look like, because the demangler | |
17449 | frequently doesn't give the same name as the debug info. We | |
17450 | could fix this by only using the demangled name to get the | |
17451 | prefix (but see comment in read_structure_type). */ | |
17452 | ||
17453 | struct partial_die_info *real_pdi; | |
17454 | struct partial_die_info *child_pdi; | |
17455 | ||
17456 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
17457 | we should not do this. We'll prepend the parent's fully qualified | |
17458 | name when we create the partial symbol. */ | |
17459 | ||
17460 | real_pdi = struct_pdi; | |
17461 | while (real_pdi->has_specification) | |
36586728 TT |
17462 | real_pdi = find_partial_die (real_pdi->spec_offset, |
17463 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
17464 | |
17465 | if (real_pdi->die_parent != NULL) | |
17466 | return; | |
17467 | ||
17468 | for (child_pdi = struct_pdi->die_child; | |
17469 | child_pdi != NULL; | |
17470 | child_pdi = child_pdi->die_sibling) | |
17471 | { | |
17472 | if (child_pdi->tag == DW_TAG_subprogram | |
17473 | && child_pdi->linkage_name != NULL) | |
17474 | { | |
17475 | char *actual_class_name | |
17476 | = language_class_name_from_physname (cu->language_defn, | |
17477 | child_pdi->linkage_name); | |
17478 | if (actual_class_name != NULL) | |
17479 | { | |
17480 | struct_pdi->name | |
224c3ddb SM |
17481 | = ((const char *) |
17482 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17483 | actual_class_name, | |
17484 | strlen (actual_class_name))); | |
abc72ce4 DE |
17485 | xfree (actual_class_name); |
17486 | } | |
17487 | break; | |
17488 | } | |
17489 | } | |
17490 | } | |
17491 | ||
72bf9492 DJ |
17492 | /* Adjust PART_DIE before generating a symbol for it. This function |
17493 | may set the is_external flag or change the DIE's name. */ | |
17494 | ||
17495 | static void | |
17496 | fixup_partial_die (struct partial_die_info *part_die, | |
17497 | struct dwarf2_cu *cu) | |
17498 | { | |
abc72ce4 DE |
17499 | /* Once we've fixed up a die, there's no point in doing so again. |
17500 | This also avoids a memory leak if we were to call | |
17501 | guess_partial_die_structure_name multiple times. */ | |
17502 | if (part_die->fixup_called) | |
17503 | return; | |
17504 | ||
72bf9492 DJ |
17505 | /* If we found a reference attribute and the DIE has no name, try |
17506 | to find a name in the referred to DIE. */ | |
17507 | ||
17508 | if (part_die->name == NULL && part_die->has_specification) | |
17509 | { | |
17510 | struct partial_die_info *spec_die; | |
72bf9492 | 17511 | |
36586728 TT |
17512 | spec_die = find_partial_die (part_die->spec_offset, |
17513 | part_die->spec_is_dwz, cu); | |
72bf9492 | 17514 | |
10b3939b | 17515 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
17516 | |
17517 | if (spec_die->name) | |
17518 | { | |
17519 | part_die->name = spec_die->name; | |
17520 | ||
17521 | /* Copy DW_AT_external attribute if it is set. */ | |
17522 | if (spec_die->is_external) | |
17523 | part_die->is_external = spec_die->is_external; | |
17524 | } | |
17525 | } | |
17526 | ||
17527 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
17528 | |
17529 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 17530 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 17531 | |
abc72ce4 DE |
17532 | /* If there is no parent die to provide a namespace, and there are |
17533 | children, see if we can determine the namespace from their linkage | |
122d1940 | 17534 | name. */ |
abc72ce4 | 17535 | if (cu->language == language_cplus |
8b70b953 | 17536 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17537 | && part_die->die_parent == NULL |
17538 | && part_die->has_children | |
17539 | && (part_die->tag == DW_TAG_class_type | |
17540 | || part_die->tag == DW_TAG_structure_type | |
17541 | || part_die->tag == DW_TAG_union_type)) | |
17542 | guess_partial_die_structure_name (part_die, cu); | |
17543 | ||
53832f31 TT |
17544 | /* GCC might emit a nameless struct or union that has a linkage |
17545 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17546 | if (part_die->name == NULL | |
96408a79 SA |
17547 | && (part_die->tag == DW_TAG_class_type |
17548 | || part_die->tag == DW_TAG_interface_type | |
17549 | || part_die->tag == DW_TAG_structure_type | |
17550 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
17551 | && part_die->linkage_name != NULL) |
17552 | { | |
17553 | char *demangled; | |
17554 | ||
8de20a37 | 17555 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
17556 | if (demangled) |
17557 | { | |
96408a79 SA |
17558 | const char *base; |
17559 | ||
17560 | /* Strip any leading namespaces/classes, keep only the base name. | |
17561 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17562 | base = strrchr (demangled, ':'); | |
17563 | if (base && base > demangled && base[-1] == ':') | |
17564 | base++; | |
17565 | else | |
17566 | base = demangled; | |
17567 | ||
34a68019 | 17568 | part_die->name |
224c3ddb SM |
17569 | = ((const char *) |
17570 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17571 | base, strlen (base))); | |
53832f31 TT |
17572 | xfree (demangled); |
17573 | } | |
17574 | } | |
17575 | ||
abc72ce4 | 17576 | part_die->fixup_called = 1; |
72bf9492 DJ |
17577 | } |
17578 | ||
a8329558 | 17579 | /* Read an attribute value described by an attribute form. */ |
c906108c | 17580 | |
d521ce57 | 17581 | static const gdb_byte * |
dee91e82 DE |
17582 | read_attribute_value (const struct die_reader_specs *reader, |
17583 | struct attribute *attr, unsigned form, | |
43988095 | 17584 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 17585 | { |
dee91e82 | 17586 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
17587 | struct objfile *objfile = cu->objfile; |
17588 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 17589 | bfd *abfd = reader->abfd; |
e7c27a73 | 17590 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17591 | unsigned int bytes_read; |
17592 | struct dwarf_block *blk; | |
17593 | ||
aead7601 | 17594 | attr->form = (enum dwarf_form) form; |
a8329558 | 17595 | switch (form) |
c906108c | 17596 | { |
c906108c | 17597 | case DW_FORM_ref_addr: |
ae411497 | 17598 | if (cu->header.version == 2) |
4568ecf9 | 17599 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 17600 | else |
4568ecf9 DE |
17601 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
17602 | &cu->header, &bytes_read); | |
ae411497 TT |
17603 | info_ptr += bytes_read; |
17604 | break; | |
36586728 TT |
17605 | case DW_FORM_GNU_ref_alt: |
17606 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17607 | info_ptr += bytes_read; | |
17608 | break; | |
ae411497 | 17609 | case DW_FORM_addr: |
e7c27a73 | 17610 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 17611 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 17612 | info_ptr += bytes_read; |
c906108c SS |
17613 | break; |
17614 | case DW_FORM_block2: | |
7b5a2f43 | 17615 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17616 | blk->size = read_2_bytes (abfd, info_ptr); |
17617 | info_ptr += 2; | |
17618 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17619 | info_ptr += blk->size; | |
17620 | DW_BLOCK (attr) = blk; | |
17621 | break; | |
17622 | case DW_FORM_block4: | |
7b5a2f43 | 17623 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17624 | blk->size = read_4_bytes (abfd, info_ptr); |
17625 | info_ptr += 4; | |
17626 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17627 | info_ptr += blk->size; | |
17628 | DW_BLOCK (attr) = blk; | |
17629 | break; | |
17630 | case DW_FORM_data2: | |
17631 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
17632 | info_ptr += 2; | |
17633 | break; | |
17634 | case DW_FORM_data4: | |
17635 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
17636 | info_ptr += 4; | |
17637 | break; | |
17638 | case DW_FORM_data8: | |
17639 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
17640 | info_ptr += 8; | |
17641 | break; | |
0224619f JK |
17642 | case DW_FORM_data16: |
17643 | blk = dwarf_alloc_block (cu); | |
17644 | blk->size = 16; | |
17645 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
17646 | info_ptr += 16; | |
17647 | DW_BLOCK (attr) = blk; | |
17648 | break; | |
2dc7f7b3 TT |
17649 | case DW_FORM_sec_offset: |
17650 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17651 | info_ptr += bytes_read; | |
17652 | break; | |
c906108c | 17653 | case DW_FORM_string: |
9b1c24c8 | 17654 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 17655 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
17656 | info_ptr += bytes_read; |
17657 | break; | |
4bdf3d34 | 17658 | case DW_FORM_strp: |
36586728 TT |
17659 | if (!cu->per_cu->is_dwz) |
17660 | { | |
17661 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
17662 | &bytes_read); | |
17663 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17664 | info_ptr += bytes_read; | |
17665 | break; | |
17666 | } | |
17667 | /* FALLTHROUGH */ | |
43988095 JK |
17668 | case DW_FORM_line_strp: |
17669 | if (!cu->per_cu->is_dwz) | |
17670 | { | |
17671 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
17672 | cu_header, &bytes_read); | |
17673 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17674 | info_ptr += bytes_read; | |
17675 | break; | |
17676 | } | |
17677 | /* FALLTHROUGH */ | |
36586728 TT |
17678 | case DW_FORM_GNU_strp_alt: |
17679 | { | |
17680 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17681 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
17682 | &bytes_read); | |
17683 | ||
17684 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
17685 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17686 | info_ptr += bytes_read; | |
17687 | } | |
4bdf3d34 | 17688 | break; |
2dc7f7b3 | 17689 | case DW_FORM_exprloc: |
c906108c | 17690 | case DW_FORM_block: |
7b5a2f43 | 17691 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17692 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17693 | info_ptr += bytes_read; | |
17694 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17695 | info_ptr += blk->size; | |
17696 | DW_BLOCK (attr) = blk; | |
17697 | break; | |
17698 | case DW_FORM_block1: | |
7b5a2f43 | 17699 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17700 | blk->size = read_1_byte (abfd, info_ptr); |
17701 | info_ptr += 1; | |
17702 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17703 | info_ptr += blk->size; | |
17704 | DW_BLOCK (attr) = blk; | |
17705 | break; | |
17706 | case DW_FORM_data1: | |
17707 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17708 | info_ptr += 1; | |
17709 | break; | |
17710 | case DW_FORM_flag: | |
17711 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17712 | info_ptr += 1; | |
17713 | break; | |
2dc7f7b3 TT |
17714 | case DW_FORM_flag_present: |
17715 | DW_UNSND (attr) = 1; | |
17716 | break; | |
c906108c SS |
17717 | case DW_FORM_sdata: |
17718 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17719 | info_ptr += bytes_read; | |
17720 | break; | |
17721 | case DW_FORM_udata: | |
17722 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17723 | info_ptr += bytes_read; | |
17724 | break; | |
17725 | case DW_FORM_ref1: | |
9c541725 | 17726 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17727 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
17728 | info_ptr += 1; |
17729 | break; | |
17730 | case DW_FORM_ref2: | |
9c541725 | 17731 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17732 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
17733 | info_ptr += 2; |
17734 | break; | |
17735 | case DW_FORM_ref4: | |
9c541725 | 17736 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17737 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
17738 | info_ptr += 4; |
17739 | break; | |
613e1657 | 17740 | case DW_FORM_ref8: |
9c541725 | 17741 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17742 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
17743 | info_ptr += 8; |
17744 | break; | |
55f1336d | 17745 | case DW_FORM_ref_sig8: |
ac9ec31b | 17746 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
17747 | info_ptr += 8; |
17748 | break; | |
c906108c | 17749 | case DW_FORM_ref_udata: |
9c541725 | 17750 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17751 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
17752 | info_ptr += bytes_read; |
17753 | break; | |
c906108c | 17754 | case DW_FORM_indirect: |
a8329558 KW |
17755 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17756 | info_ptr += bytes_read; | |
43988095 JK |
17757 | if (form == DW_FORM_implicit_const) |
17758 | { | |
17759 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17760 | info_ptr += bytes_read; | |
17761 | } | |
17762 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
17763 | info_ptr); | |
17764 | break; | |
17765 | case DW_FORM_implicit_const: | |
17766 | DW_SND (attr) = implicit_const; | |
a8329558 | 17767 | break; |
3019eac3 DE |
17768 | case DW_FORM_GNU_addr_index: |
17769 | if (reader->dwo_file == NULL) | |
17770 | { | |
17771 | /* For now flag a hard error. | |
17772 | Later we can turn this into a complaint. */ | |
17773 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17774 | dwarf_form_name (form), | |
17775 | bfd_get_filename (abfd)); | |
17776 | } | |
17777 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
17778 | info_ptr += bytes_read; | |
17779 | break; | |
17780 | case DW_FORM_GNU_str_index: | |
17781 | if (reader->dwo_file == NULL) | |
17782 | { | |
17783 | /* For now flag a hard error. | |
17784 | Later we can turn this into a complaint if warranted. */ | |
17785 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17786 | dwarf_form_name (form), | |
17787 | bfd_get_filename (abfd)); | |
17788 | } | |
17789 | { | |
17790 | ULONGEST str_index = | |
17791 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17792 | ||
342587c4 | 17793 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
17794 | DW_STRING_IS_CANONICAL (attr) = 0; |
17795 | info_ptr += bytes_read; | |
17796 | } | |
17797 | break; | |
c906108c | 17798 | default: |
8a3fe4f8 | 17799 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
17800 | dwarf_form_name (form), |
17801 | bfd_get_filename (abfd)); | |
c906108c | 17802 | } |
28e94949 | 17803 | |
36586728 | 17804 | /* Super hack. */ |
7771576e | 17805 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
17806 | attr->form = DW_FORM_GNU_ref_alt; |
17807 | ||
28e94949 JB |
17808 | /* We have seen instances where the compiler tried to emit a byte |
17809 | size attribute of -1 which ended up being encoded as an unsigned | |
17810 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
17811 | an object of this size seems pretty unlikely so we can relatively | |
17812 | safely treat these cases as if the size attribute was invalid and | |
17813 | treat them as zero by default. */ | |
17814 | if (attr->name == DW_AT_byte_size | |
17815 | && form == DW_FORM_data4 | |
17816 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
17817 | { |
17818 | complaint | |
17819 | (&symfile_complaints, | |
43bbcdc2 PH |
17820 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
17821 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
17822 | DW_UNSND (attr) = 0; |
17823 | } | |
28e94949 | 17824 | |
c906108c SS |
17825 | return info_ptr; |
17826 | } | |
17827 | ||
a8329558 KW |
17828 | /* Read an attribute described by an abbreviated attribute. */ |
17829 | ||
d521ce57 | 17830 | static const gdb_byte * |
dee91e82 DE |
17831 | read_attribute (const struct die_reader_specs *reader, |
17832 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 17833 | const gdb_byte *info_ptr) |
a8329558 KW |
17834 | { |
17835 | attr->name = abbrev->name; | |
43988095 JK |
17836 | return read_attribute_value (reader, attr, abbrev->form, |
17837 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
17838 | } |
17839 | ||
0963b4bd | 17840 | /* Read dwarf information from a buffer. */ |
c906108c SS |
17841 | |
17842 | static unsigned int | |
a1855c1d | 17843 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17844 | { |
fe1b8b76 | 17845 | return bfd_get_8 (abfd, buf); |
c906108c SS |
17846 | } |
17847 | ||
17848 | static int | |
a1855c1d | 17849 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17850 | { |
fe1b8b76 | 17851 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
17852 | } |
17853 | ||
17854 | static unsigned int | |
a1855c1d | 17855 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17856 | { |
fe1b8b76 | 17857 | return bfd_get_16 (abfd, buf); |
c906108c SS |
17858 | } |
17859 | ||
21ae7a4d | 17860 | static int |
a1855c1d | 17861 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17862 | { |
17863 | return bfd_get_signed_16 (abfd, buf); | |
17864 | } | |
17865 | ||
c906108c | 17866 | static unsigned int |
a1855c1d | 17867 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17868 | { |
fe1b8b76 | 17869 | return bfd_get_32 (abfd, buf); |
c906108c SS |
17870 | } |
17871 | ||
21ae7a4d | 17872 | static int |
a1855c1d | 17873 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17874 | { |
17875 | return bfd_get_signed_32 (abfd, buf); | |
17876 | } | |
17877 | ||
93311388 | 17878 | static ULONGEST |
a1855c1d | 17879 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17880 | { |
fe1b8b76 | 17881 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17882 | } |
17883 | ||
17884 | static CORE_ADDR | |
d521ce57 | 17885 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17886 | unsigned int *bytes_read) |
c906108c | 17887 | { |
e7c27a73 | 17888 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17889 | CORE_ADDR retval = 0; |
17890 | ||
107d2387 | 17891 | if (cu_header->signed_addr_p) |
c906108c | 17892 | { |
107d2387 AC |
17893 | switch (cu_header->addr_size) |
17894 | { | |
17895 | case 2: | |
fe1b8b76 | 17896 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17897 | break; |
17898 | case 4: | |
fe1b8b76 | 17899 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17900 | break; |
17901 | case 8: | |
fe1b8b76 | 17902 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17903 | break; |
17904 | default: | |
8e65ff28 | 17905 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17906 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17907 | bfd_get_filename (abfd)); |
107d2387 AC |
17908 | } |
17909 | } | |
17910 | else | |
17911 | { | |
17912 | switch (cu_header->addr_size) | |
17913 | { | |
17914 | case 2: | |
fe1b8b76 | 17915 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17916 | break; |
17917 | case 4: | |
fe1b8b76 | 17918 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17919 | break; |
17920 | case 8: | |
fe1b8b76 | 17921 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17922 | break; |
17923 | default: | |
8e65ff28 | 17924 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17925 | _("read_address: bad switch, " |
17926 | "unsigned [in module %s]"), | |
659b0389 | 17927 | bfd_get_filename (abfd)); |
107d2387 | 17928 | } |
c906108c | 17929 | } |
64367e0a | 17930 | |
107d2387 AC |
17931 | *bytes_read = cu_header->addr_size; |
17932 | return retval; | |
c906108c SS |
17933 | } |
17934 | ||
f7ef9339 | 17935 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17936 | specification allows the initial length to take up either 4 bytes |
17937 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17938 | bytes describe the length and all offsets will be 8 bytes in length | |
17939 | instead of 4. | |
17940 | ||
f7ef9339 KB |
17941 | An older, non-standard 64-bit format is also handled by this |
17942 | function. The older format in question stores the initial length | |
17943 | as an 8-byte quantity without an escape value. Lengths greater | |
17944 | than 2^32 aren't very common which means that the initial 4 bytes | |
17945 | is almost always zero. Since a length value of zero doesn't make | |
17946 | sense for the 32-bit format, this initial zero can be considered to | |
17947 | be an escape value which indicates the presence of the older 64-bit | |
17948 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
17949 | greater than 4GB. If it becomes necessary to handle lengths |
17950 | somewhat larger than 4GB, we could allow other small values (such | |
17951 | as the non-sensical values of 1, 2, and 3) to also be used as | |
17952 | escape values indicating the presence of the old format. | |
f7ef9339 | 17953 | |
917c78fc MK |
17954 | The value returned via bytes_read should be used to increment the |
17955 | relevant pointer after calling read_initial_length(). | |
c764a876 | 17956 | |
613e1657 KB |
17957 | [ Note: read_initial_length() and read_offset() are based on the |
17958 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 17959 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
17960 | from: |
17961 | ||
f7ef9339 | 17962 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 17963 | |
613e1657 KB |
17964 | This document is only a draft and is subject to change. (So beware.) |
17965 | ||
f7ef9339 | 17966 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
17967 | determined empirically by examining 64-bit ELF files produced by |
17968 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
17969 | |
17970 | - Kevin, July 16, 2002 | |
613e1657 KB |
17971 | ] */ |
17972 | ||
17973 | static LONGEST | |
d521ce57 | 17974 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 17975 | { |
fe1b8b76 | 17976 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 17977 | |
dd373385 | 17978 | if (length == 0xffffffff) |
613e1657 | 17979 | { |
fe1b8b76 | 17980 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 17981 | *bytes_read = 12; |
613e1657 | 17982 | } |
dd373385 | 17983 | else if (length == 0) |
f7ef9339 | 17984 | { |
dd373385 | 17985 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 17986 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 17987 | *bytes_read = 8; |
f7ef9339 | 17988 | } |
613e1657 KB |
17989 | else |
17990 | { | |
17991 | *bytes_read = 4; | |
613e1657 KB |
17992 | } |
17993 | ||
c764a876 DE |
17994 | return length; |
17995 | } | |
dd373385 | 17996 | |
c764a876 DE |
17997 | /* Cover function for read_initial_length. |
17998 | Returns the length of the object at BUF, and stores the size of the | |
17999 | initial length in *BYTES_READ and stores the size that offsets will be in | |
18000 | *OFFSET_SIZE. | |
18001 | If the initial length size is not equivalent to that specified in | |
18002 | CU_HEADER then issue a complaint. | |
18003 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 18004 | |
c764a876 | 18005 | static LONGEST |
d521ce57 | 18006 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
18007 | const struct comp_unit_head *cu_header, |
18008 | unsigned int *bytes_read, | |
18009 | unsigned int *offset_size) | |
18010 | { | |
18011 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
18012 | ||
18013 | gdb_assert (cu_header->initial_length_size == 4 | |
18014 | || cu_header->initial_length_size == 8 | |
18015 | || cu_header->initial_length_size == 12); | |
18016 | ||
18017 | if (cu_header->initial_length_size != *bytes_read) | |
18018 | complaint (&symfile_complaints, | |
18019 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 18020 | |
c764a876 | 18021 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 18022 | return length; |
613e1657 KB |
18023 | } |
18024 | ||
18025 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 18026 | given by cu_header->offset_size. */ |
613e1657 KB |
18027 | |
18028 | static LONGEST | |
d521ce57 TT |
18029 | read_offset (bfd *abfd, const gdb_byte *buf, |
18030 | const struct comp_unit_head *cu_header, | |
891d2f0b | 18031 | unsigned int *bytes_read) |
c764a876 DE |
18032 | { |
18033 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 18034 | |
c764a876 DE |
18035 | *bytes_read = cu_header->offset_size; |
18036 | return offset; | |
18037 | } | |
18038 | ||
18039 | /* Read an offset from the data stream. */ | |
18040 | ||
18041 | static LONGEST | |
d521ce57 | 18042 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
18043 | { |
18044 | LONGEST retval = 0; | |
18045 | ||
c764a876 | 18046 | switch (offset_size) |
613e1657 KB |
18047 | { |
18048 | case 4: | |
fe1b8b76 | 18049 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
18050 | break; |
18051 | case 8: | |
fe1b8b76 | 18052 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
18053 | break; |
18054 | default: | |
8e65ff28 | 18055 | internal_error (__FILE__, __LINE__, |
c764a876 | 18056 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 18057 | bfd_get_filename (abfd)); |
613e1657 KB |
18058 | } |
18059 | ||
917c78fc | 18060 | return retval; |
613e1657 KB |
18061 | } |
18062 | ||
d521ce57 TT |
18063 | static const gdb_byte * |
18064 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
18065 | { |
18066 | /* If the size of a host char is 8 bits, we can return a pointer | |
18067 | to the buffer, otherwise we have to copy the data to a buffer | |
18068 | allocated on the temporary obstack. */ | |
4bdf3d34 | 18069 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 18070 | return buf; |
c906108c SS |
18071 | } |
18072 | ||
d521ce57 TT |
18073 | static const char * |
18074 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
18075 | unsigned int *bytes_read_ptr) | |
c906108c SS |
18076 | { |
18077 | /* If the size of a host char is 8 bits, we can return a pointer | |
18078 | to the string, otherwise we have to copy the string to a buffer | |
18079 | allocated on the temporary obstack. */ | |
4bdf3d34 | 18080 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
18081 | if (*buf == '\0') |
18082 | { | |
18083 | *bytes_read_ptr = 1; | |
18084 | return NULL; | |
18085 | } | |
d521ce57 TT |
18086 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
18087 | return (const char *) buf; | |
4bdf3d34 JJ |
18088 | } |
18089 | ||
43988095 JK |
18090 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
18091 | reporting strings FORM_NAME and SECT_NAME. */ | |
18092 | ||
d521ce57 | 18093 | static const char * |
43988095 JK |
18094 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
18095 | struct dwarf2_section_info *sect, | |
18096 | const char *form_name, | |
18097 | const char *sect_name) | |
18098 | { | |
18099 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
18100 | if (sect->buffer == NULL) | |
18101 | error (_("%s used without %s section [in module %s]"), | |
18102 | form_name, sect_name, bfd_get_filename (abfd)); | |
18103 | if (str_offset >= sect->size) | |
18104 | error (_("%s pointing outside of %s section [in module %s]"), | |
18105 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 18106 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 18107 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 18108 | return NULL; |
43988095 JK |
18109 | return (const char *) (sect->buffer + str_offset); |
18110 | } | |
18111 | ||
18112 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
18113 | ||
18114 | static const char * | |
18115 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
18116 | { | |
18117 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
18118 | &dwarf2_per_objfile->str, | |
18119 | "DW_FORM_strp", ".debug_str"); | |
18120 | } | |
18121 | ||
18122 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
18123 | ||
18124 | static const char * | |
18125 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
18126 | { | |
18127 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
18128 | &dwarf2_per_objfile->line_str, | |
18129 | "DW_FORM_line_strp", | |
18130 | ".debug_line_str"); | |
c906108c SS |
18131 | } |
18132 | ||
36586728 TT |
18133 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
18134 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
18135 | the string consists of a single NUL byte, return NULL; otherwise | |
18136 | return a pointer to the string. */ | |
18137 | ||
d521ce57 | 18138 | static const char * |
36586728 TT |
18139 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
18140 | { | |
18141 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
18142 | ||
18143 | if (dwz->str.buffer == NULL) | |
18144 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
18145 | "section [in module %s]"), | |
18146 | bfd_get_filename (dwz->dwz_bfd)); | |
18147 | if (str_offset >= dwz->str.size) | |
18148 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
18149 | ".debug_str section [in module %s]"), | |
18150 | bfd_get_filename (dwz->dwz_bfd)); | |
18151 | gdb_assert (HOST_CHAR_BIT == 8); | |
18152 | if (dwz->str.buffer[str_offset] == '\0') | |
18153 | return NULL; | |
d521ce57 | 18154 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
18155 | } |
18156 | ||
43988095 JK |
18157 | /* Return pointer to string at .debug_str offset as read from BUF. |
18158 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18159 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18160 | ||
d521ce57 TT |
18161 | static const char * |
18162 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
18163 | const struct comp_unit_head *cu_header, |
18164 | unsigned int *bytes_read_ptr) | |
18165 | { | |
18166 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
18167 | ||
18168 | return read_indirect_string_at_offset (abfd, str_offset); | |
18169 | } | |
18170 | ||
43988095 JK |
18171 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
18172 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18173 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18174 | ||
18175 | static const char * | |
18176 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
18177 | const struct comp_unit_head *cu_header, | |
18178 | unsigned int *bytes_read_ptr) | |
18179 | { | |
18180 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
18181 | ||
18182 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
18183 | } | |
18184 | ||
18185 | ULONGEST | |
d521ce57 | 18186 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 18187 | unsigned int *bytes_read_ptr) |
c906108c | 18188 | { |
12df843f | 18189 | ULONGEST result; |
ce5d95e1 | 18190 | unsigned int num_read; |
870f88f7 | 18191 | int shift; |
c906108c SS |
18192 | unsigned char byte; |
18193 | ||
18194 | result = 0; | |
18195 | shift = 0; | |
18196 | num_read = 0; | |
c906108c SS |
18197 | while (1) |
18198 | { | |
fe1b8b76 | 18199 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
18200 | buf++; |
18201 | num_read++; | |
12df843f | 18202 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
18203 | if ((byte & 128) == 0) |
18204 | { | |
18205 | break; | |
18206 | } | |
18207 | shift += 7; | |
18208 | } | |
18209 | *bytes_read_ptr = num_read; | |
18210 | return result; | |
18211 | } | |
18212 | ||
12df843f | 18213 | static LONGEST |
d521ce57 TT |
18214 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
18215 | unsigned int *bytes_read_ptr) | |
c906108c | 18216 | { |
12df843f | 18217 | LONGEST result; |
870f88f7 | 18218 | int shift, num_read; |
c906108c SS |
18219 | unsigned char byte; |
18220 | ||
18221 | result = 0; | |
18222 | shift = 0; | |
c906108c | 18223 | num_read = 0; |
c906108c SS |
18224 | while (1) |
18225 | { | |
fe1b8b76 | 18226 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
18227 | buf++; |
18228 | num_read++; | |
12df843f | 18229 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
18230 | shift += 7; |
18231 | if ((byte & 128) == 0) | |
18232 | { | |
18233 | break; | |
18234 | } | |
18235 | } | |
77e0b926 | 18236 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 18237 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
18238 | *bytes_read_ptr = num_read; |
18239 | return result; | |
18240 | } | |
18241 | ||
3019eac3 DE |
18242 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18243 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
18244 | ADDR_SIZE is the size of addresses from the CU header. */ | |
18245 | ||
18246 | static CORE_ADDR | |
18247 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
18248 | { | |
18249 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18250 | bfd *abfd = objfile->obfd; | |
18251 | const gdb_byte *info_ptr; | |
18252 | ||
18253 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
18254 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
18255 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 18256 | objfile_name (objfile)); |
3019eac3 DE |
18257 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
18258 | error (_("DW_FORM_addr_index pointing outside of " | |
18259 | ".debug_addr section [in module %s]"), | |
4262abfb | 18260 | objfile_name (objfile)); |
3019eac3 DE |
18261 | info_ptr = (dwarf2_per_objfile->addr.buffer |
18262 | + addr_base + addr_index * addr_size); | |
18263 | if (addr_size == 4) | |
18264 | return bfd_get_32 (abfd, info_ptr); | |
18265 | else | |
18266 | return bfd_get_64 (abfd, info_ptr); | |
18267 | } | |
18268 | ||
18269 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
18270 | ||
18271 | static CORE_ADDR | |
18272 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
18273 | { | |
18274 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
18275 | } | |
18276 | ||
18277 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
18278 | ||
18279 | static CORE_ADDR | |
d521ce57 | 18280 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
18281 | unsigned int *bytes_read) |
18282 | { | |
18283 | bfd *abfd = cu->objfile->obfd; | |
18284 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
18285 | ||
18286 | return read_addr_index (cu, addr_index); | |
18287 | } | |
18288 | ||
18289 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
18290 | back to dwarf2_read_addr_index. */ | |
18291 | ||
18292 | struct dwarf2_read_addr_index_data | |
18293 | { | |
18294 | ULONGEST addr_base; | |
18295 | int addr_size; | |
18296 | }; | |
18297 | ||
18298 | /* die_reader_func for dwarf2_read_addr_index. */ | |
18299 | ||
18300 | static void | |
18301 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 18302 | const gdb_byte *info_ptr, |
3019eac3 DE |
18303 | struct die_info *comp_unit_die, |
18304 | int has_children, | |
18305 | void *data) | |
18306 | { | |
18307 | struct dwarf2_cu *cu = reader->cu; | |
18308 | struct dwarf2_read_addr_index_data *aidata = | |
18309 | (struct dwarf2_read_addr_index_data *) data; | |
18310 | ||
18311 | aidata->addr_base = cu->addr_base; | |
18312 | aidata->addr_size = cu->header.addr_size; | |
18313 | } | |
18314 | ||
18315 | /* Given an index in .debug_addr, fetch the value. | |
18316 | NOTE: This can be called during dwarf expression evaluation, | |
18317 | long after the debug information has been read, and thus per_cu->cu | |
18318 | may no longer exist. */ | |
18319 | ||
18320 | CORE_ADDR | |
18321 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
18322 | unsigned int addr_index) | |
18323 | { | |
18324 | struct objfile *objfile = per_cu->objfile; | |
18325 | struct dwarf2_cu *cu = per_cu->cu; | |
18326 | ULONGEST addr_base; | |
18327 | int addr_size; | |
18328 | ||
18329 | /* This is intended to be called from outside this file. */ | |
18330 | dw2_setup (objfile); | |
18331 | ||
18332 | /* We need addr_base and addr_size. | |
18333 | If we don't have PER_CU->cu, we have to get it. | |
18334 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18335 | which at this point doesn't seem justified: it's not clear how frequently | |
18336 | it would get used and it would increase the size of every PER_CU. | |
18337 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18338 | so we're not in uncharted territory here. | |
18339 | Alas we need to be a bit more complicated as addr_base is contained | |
18340 | in the DIE. | |
18341 | ||
18342 | We don't need to read the entire CU(/TU). | |
18343 | We just need the header and top level die. | |
a1b64ce1 | 18344 | |
3019eac3 | 18345 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18346 | For now we skip this optimization. */ |
3019eac3 DE |
18347 | |
18348 | if (cu != NULL) | |
18349 | { | |
18350 | addr_base = cu->addr_base; | |
18351 | addr_size = cu->header.addr_size; | |
18352 | } | |
18353 | else | |
18354 | { | |
18355 | struct dwarf2_read_addr_index_data aidata; | |
18356 | ||
a1b64ce1 DE |
18357 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
18358 | we need addr_base. */ | |
18359 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
18360 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
18361 | addr_base = aidata.addr_base; |
18362 | addr_size = aidata.addr_size; | |
18363 | } | |
18364 | ||
18365 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
18366 | } | |
18367 | ||
57d63ce2 DE |
18368 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
18369 | This is only used by the Fission support. */ | |
3019eac3 | 18370 | |
d521ce57 | 18371 | static const char * |
342587c4 | 18372 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
18373 | { |
18374 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 18375 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18376 | bfd *abfd = objfile->obfd; |
342587c4 | 18377 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
18378 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
18379 | struct dwarf2_section_info *str_offsets_section = | |
18380 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 18381 | const gdb_byte *info_ptr; |
3019eac3 | 18382 | ULONGEST str_offset; |
57d63ce2 | 18383 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 18384 | |
73869dc2 DE |
18385 | dwarf2_read_section (objfile, str_section); |
18386 | dwarf2_read_section (objfile, str_offsets_section); | |
18387 | if (str_section->buffer == NULL) | |
57d63ce2 | 18388 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
18389 | " in CU at offset 0x%x [in module %s]"), |
18390 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18391 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 18392 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
18393 | " in CU at offset 0x%x [in module %s]"), |
18394 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18395 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 18396 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
18397 | " section in CU at offset 0x%x [in module %s]"), |
18398 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18399 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
18400 | + str_index * cu->header.offset_size); |
18401 | if (cu->header.offset_size == 4) | |
18402 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18403 | else | |
18404 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18405 | if (str_offset >= str_section->size) |
57d63ce2 | 18406 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
18407 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
18408 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18409 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
18410 | } |
18411 | ||
3019eac3 DE |
18412 | /* Return the length of an LEB128 number in BUF. */ |
18413 | ||
18414 | static int | |
18415 | leb128_size (const gdb_byte *buf) | |
18416 | { | |
18417 | const gdb_byte *begin = buf; | |
18418 | gdb_byte byte; | |
18419 | ||
18420 | while (1) | |
18421 | { | |
18422 | byte = *buf++; | |
18423 | if ((byte & 128) == 0) | |
18424 | return buf - begin; | |
18425 | } | |
18426 | } | |
18427 | ||
c906108c | 18428 | static void |
e142c38c | 18429 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
18430 | { |
18431 | switch (lang) | |
18432 | { | |
18433 | case DW_LANG_C89: | |
76bee0cc | 18434 | case DW_LANG_C99: |
0cfd832f | 18435 | case DW_LANG_C11: |
c906108c | 18436 | case DW_LANG_C: |
d1be3247 | 18437 | case DW_LANG_UPC: |
e142c38c | 18438 | cu->language = language_c; |
c906108c | 18439 | break; |
9c37b5ae | 18440 | case DW_LANG_Java: |
c906108c | 18441 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
18442 | case DW_LANG_C_plus_plus_11: |
18443 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 18444 | cu->language = language_cplus; |
c906108c | 18445 | break; |
6aecb9c2 JB |
18446 | case DW_LANG_D: |
18447 | cu->language = language_d; | |
18448 | break; | |
c906108c SS |
18449 | case DW_LANG_Fortran77: |
18450 | case DW_LANG_Fortran90: | |
b21b22e0 | 18451 | case DW_LANG_Fortran95: |
f7de9aab MW |
18452 | case DW_LANG_Fortran03: |
18453 | case DW_LANG_Fortran08: | |
e142c38c | 18454 | cu->language = language_fortran; |
c906108c | 18455 | break; |
a766d390 DE |
18456 | case DW_LANG_Go: |
18457 | cu->language = language_go; | |
18458 | break; | |
c906108c | 18459 | case DW_LANG_Mips_Assembler: |
e142c38c | 18460 | cu->language = language_asm; |
c906108c SS |
18461 | break; |
18462 | case DW_LANG_Ada83: | |
8aaf0b47 | 18463 | case DW_LANG_Ada95: |
bc5f45f8 JB |
18464 | cu->language = language_ada; |
18465 | break; | |
72019c9c GM |
18466 | case DW_LANG_Modula2: |
18467 | cu->language = language_m2; | |
18468 | break; | |
fe8e67fd PM |
18469 | case DW_LANG_Pascal83: |
18470 | cu->language = language_pascal; | |
18471 | break; | |
22566fbd DJ |
18472 | case DW_LANG_ObjC: |
18473 | cu->language = language_objc; | |
18474 | break; | |
c44af4eb TT |
18475 | case DW_LANG_Rust: |
18476 | case DW_LANG_Rust_old: | |
18477 | cu->language = language_rust; | |
18478 | break; | |
c906108c SS |
18479 | case DW_LANG_Cobol74: |
18480 | case DW_LANG_Cobol85: | |
c906108c | 18481 | default: |
e142c38c | 18482 | cu->language = language_minimal; |
c906108c SS |
18483 | break; |
18484 | } | |
e142c38c | 18485 | cu->language_defn = language_def (cu->language); |
c906108c SS |
18486 | } |
18487 | ||
18488 | /* Return the named attribute or NULL if not there. */ | |
18489 | ||
18490 | static struct attribute * | |
e142c38c | 18491 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 18492 | { |
a48e046c | 18493 | for (;;) |
c906108c | 18494 | { |
a48e046c TT |
18495 | unsigned int i; |
18496 | struct attribute *spec = NULL; | |
18497 | ||
18498 | for (i = 0; i < die->num_attrs; ++i) | |
18499 | { | |
18500 | if (die->attrs[i].name == name) | |
18501 | return &die->attrs[i]; | |
18502 | if (die->attrs[i].name == DW_AT_specification | |
18503 | || die->attrs[i].name == DW_AT_abstract_origin) | |
18504 | spec = &die->attrs[i]; | |
18505 | } | |
18506 | ||
18507 | if (!spec) | |
18508 | break; | |
c906108c | 18509 | |
f2f0e013 | 18510 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 18511 | } |
c5aa993b | 18512 | |
c906108c SS |
18513 | return NULL; |
18514 | } | |
18515 | ||
348e048f DE |
18516 | /* Return the named attribute or NULL if not there, |
18517 | but do not follow DW_AT_specification, etc. | |
18518 | This is for use in contexts where we're reading .debug_types dies. | |
18519 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
18520 | back up the chain, and we want to go down. */ | |
18521 | ||
18522 | static struct attribute * | |
45e58e77 | 18523 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
18524 | { |
18525 | unsigned int i; | |
18526 | ||
18527 | for (i = 0; i < die->num_attrs; ++i) | |
18528 | if (die->attrs[i].name == name) | |
18529 | return &die->attrs[i]; | |
18530 | ||
18531 | return NULL; | |
18532 | } | |
18533 | ||
7d45c7c3 KB |
18534 | /* Return the string associated with a string-typed attribute, or NULL if it |
18535 | is either not found or is of an incorrect type. */ | |
18536 | ||
18537 | static const char * | |
18538 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
18539 | { | |
18540 | struct attribute *attr; | |
18541 | const char *str = NULL; | |
18542 | ||
18543 | attr = dwarf2_attr (die, name, cu); | |
18544 | ||
18545 | if (attr != NULL) | |
18546 | { | |
43988095 | 18547 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
18548 | || attr->form == DW_FORM_string |
18549 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 18550 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
18551 | str = DW_STRING (attr); |
18552 | else | |
18553 | complaint (&symfile_complaints, | |
18554 | _("string type expected for attribute %s for " | |
18555 | "DIE at 0x%x in module %s"), | |
9c541725 | 18556 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
18557 | objfile_name (cu->objfile)); |
18558 | } | |
18559 | ||
18560 | return str; | |
18561 | } | |
18562 | ||
05cf31d1 JB |
18563 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
18564 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 18565 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
18566 | |
18567 | static int | |
18568 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
18569 | { | |
18570 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
18571 | ||
18572 | return (attr && DW_UNSND (attr)); | |
18573 | } | |
18574 | ||
3ca72b44 | 18575 | static int |
e142c38c | 18576 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 18577 | { |
05cf31d1 JB |
18578 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
18579 | which value is non-zero. However, we have to be careful with | |
18580 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
18581 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
18582 | end up accidently finding a declaration attribute that belongs | |
18583 | to a different DIE referenced by the specification attribute, | |
18584 | even though the given DIE does not have a declaration attribute. */ | |
18585 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
18586 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
18587 | } |
18588 | ||
63d06c5c | 18589 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 18590 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
18591 | containing the return value on output. If there is no |
18592 | specification, but there is an abstract origin, that is | |
18593 | returned. */ | |
63d06c5c DC |
18594 | |
18595 | static struct die_info * | |
f2f0e013 | 18596 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 18597 | { |
f2f0e013 DJ |
18598 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
18599 | *spec_cu); | |
63d06c5c | 18600 | |
edb3359d DJ |
18601 | if (spec_attr == NULL) |
18602 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
18603 | ||
63d06c5c DC |
18604 | if (spec_attr == NULL) |
18605 | return NULL; | |
18606 | else | |
f2f0e013 | 18607 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 18608 | } |
c906108c | 18609 | |
527f3840 JK |
18610 | /* Stub for free_line_header to match void * callback types. */ |
18611 | ||
18612 | static void | |
18613 | free_line_header_voidp (void *arg) | |
18614 | { | |
9a3c8263 | 18615 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 18616 | |
fff8551c | 18617 | delete lh; |
527f3840 JK |
18618 | } |
18619 | ||
fff8551c PA |
18620 | void |
18621 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 18622 | { |
27e0867f | 18623 | if (dwarf_line_debug >= 2) |
fff8551c PA |
18624 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
18625 | include_dirs.size () + 1, include_dir); | |
27e0867f | 18626 | |
fff8551c | 18627 | include_dirs.push_back (include_dir); |
debd256d | 18628 | } |
6e70227d | 18629 | |
fff8551c PA |
18630 | void |
18631 | line_header::add_file_name (const char *name, | |
ecfb656c | 18632 | dir_index d_index, |
fff8551c PA |
18633 | unsigned int mod_time, |
18634 | unsigned int length) | |
debd256d | 18635 | { |
27e0867f DE |
18636 | if (dwarf_line_debug >= 2) |
18637 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 18638 | (unsigned) file_names.size () + 1, name); |
27e0867f | 18639 | |
ecfb656c | 18640 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 18641 | } |
6e70227d | 18642 | |
83769d0b | 18643 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
18644 | |
18645 | static struct dwarf2_section_info * | |
18646 | get_debug_line_section (struct dwarf2_cu *cu) | |
18647 | { | |
18648 | struct dwarf2_section_info *section; | |
18649 | ||
18650 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
18651 | DWO file. */ | |
18652 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
18653 | section = &cu->dwo_unit->dwo_file->sections.line; | |
18654 | else if (cu->per_cu->is_dwz) | |
18655 | { | |
18656 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18657 | ||
18658 | section = &dwz->line; | |
18659 | } | |
18660 | else | |
18661 | section = &dwarf2_per_objfile->line; | |
18662 | ||
18663 | return section; | |
18664 | } | |
18665 | ||
43988095 JK |
18666 | /* Read directory or file name entry format, starting with byte of |
18667 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
18668 | entries count and the entries themselves in the described entry | |
18669 | format. */ | |
18670 | ||
18671 | static void | |
18672 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
18673 | struct line_header *lh, | |
18674 | const struct comp_unit_head *cu_header, | |
18675 | void (*callback) (struct line_header *lh, | |
18676 | const char *name, | |
ecfb656c | 18677 | dir_index d_index, |
43988095 JK |
18678 | unsigned int mod_time, |
18679 | unsigned int length)) | |
18680 | { | |
18681 | gdb_byte format_count, formati; | |
18682 | ULONGEST data_count, datai; | |
18683 | const gdb_byte *buf = *bufp; | |
18684 | const gdb_byte *format_header_data; | |
18685 | int i; | |
18686 | unsigned int bytes_read; | |
18687 | ||
18688 | format_count = read_1_byte (abfd, buf); | |
18689 | buf += 1; | |
18690 | format_header_data = buf; | |
18691 | for (formati = 0; formati < format_count; formati++) | |
18692 | { | |
18693 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18694 | buf += bytes_read; | |
18695 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18696 | buf += bytes_read; | |
18697 | } | |
18698 | ||
18699 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18700 | buf += bytes_read; | |
18701 | for (datai = 0; datai < data_count; datai++) | |
18702 | { | |
18703 | const gdb_byte *format = format_header_data; | |
18704 | struct file_entry fe; | |
18705 | ||
43988095 JK |
18706 | for (formati = 0; formati < format_count; formati++) |
18707 | { | |
ecfb656c | 18708 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18709 | format += bytes_read; |
43988095 | 18710 | |
ecfb656c | 18711 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18712 | format += bytes_read; |
ecfb656c PA |
18713 | |
18714 | gdb::optional<const char *> string; | |
18715 | gdb::optional<unsigned int> uint; | |
18716 | ||
43988095 JK |
18717 | switch (form) |
18718 | { | |
18719 | case DW_FORM_string: | |
ecfb656c | 18720 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
18721 | buf += bytes_read; |
18722 | break; | |
18723 | ||
18724 | case DW_FORM_line_strp: | |
ecfb656c PA |
18725 | string.emplace (read_indirect_line_string (abfd, buf, |
18726 | cu_header, | |
18727 | &bytes_read)); | |
43988095 JK |
18728 | buf += bytes_read; |
18729 | break; | |
18730 | ||
18731 | case DW_FORM_data1: | |
ecfb656c | 18732 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
18733 | buf += 1; |
18734 | break; | |
18735 | ||
18736 | case DW_FORM_data2: | |
ecfb656c | 18737 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
18738 | buf += 2; |
18739 | break; | |
18740 | ||
18741 | case DW_FORM_data4: | |
ecfb656c | 18742 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
18743 | buf += 4; |
18744 | break; | |
18745 | ||
18746 | case DW_FORM_data8: | |
ecfb656c | 18747 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
18748 | buf += 8; |
18749 | break; | |
18750 | ||
18751 | case DW_FORM_udata: | |
ecfb656c | 18752 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
18753 | buf += bytes_read; |
18754 | break; | |
18755 | ||
18756 | case DW_FORM_block: | |
18757 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
18758 | current GDB. */ | |
18759 | break; | |
18760 | } | |
ecfb656c PA |
18761 | |
18762 | switch (content_type) | |
18763 | { | |
18764 | case DW_LNCT_path: | |
18765 | if (string.has_value ()) | |
18766 | fe.name = *string; | |
18767 | break; | |
18768 | case DW_LNCT_directory_index: | |
18769 | if (uint.has_value ()) | |
18770 | fe.d_index = (dir_index) *uint; | |
18771 | break; | |
18772 | case DW_LNCT_timestamp: | |
18773 | if (uint.has_value ()) | |
18774 | fe.mod_time = *uint; | |
18775 | break; | |
18776 | case DW_LNCT_size: | |
18777 | if (uint.has_value ()) | |
18778 | fe.length = *uint; | |
18779 | break; | |
18780 | case DW_LNCT_MD5: | |
18781 | break; | |
18782 | default: | |
18783 | complaint (&symfile_complaints, | |
18784 | _("Unknown format content type %s"), | |
18785 | pulongest (content_type)); | |
18786 | } | |
43988095 JK |
18787 | } |
18788 | ||
ecfb656c | 18789 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
18790 | } |
18791 | ||
18792 | *bufp = buf; | |
18793 | } | |
18794 | ||
debd256d | 18795 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 18796 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 18797 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
18798 | Returns NULL if there is a problem reading the header, e.g., if it |
18799 | has a version we don't understand. | |
debd256d JB |
18800 | |
18801 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
18802 | the returned object point into the dwarf line section buffer, |
18803 | and must not be freed. */ | |
ae2de4f8 | 18804 | |
fff8551c | 18805 | static line_header_up |
9c541725 | 18806 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 18807 | { |
d521ce57 | 18808 | const gdb_byte *line_ptr; |
c764a876 | 18809 | unsigned int bytes_read, offset_size; |
debd256d | 18810 | int i; |
d521ce57 | 18811 | const char *cur_dir, *cur_file; |
3019eac3 DE |
18812 | struct dwarf2_section_info *section; |
18813 | bfd *abfd; | |
18814 | ||
36586728 | 18815 | section = get_debug_line_section (cu); |
3019eac3 DE |
18816 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
18817 | if (section->buffer == NULL) | |
debd256d | 18818 | { |
3019eac3 DE |
18819 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
18820 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
18821 | else | |
18822 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
18823 | return 0; |
18824 | } | |
18825 | ||
fceca515 DE |
18826 | /* We can't do this until we know the section is non-empty. |
18827 | Only then do we know we have such a section. */ | |
a32a8923 | 18828 | abfd = get_section_bfd_owner (section); |
fceca515 | 18829 | |
a738430d MK |
18830 | /* Make sure that at least there's room for the total_length field. |
18831 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 18832 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 18833 | { |
4d3c2250 | 18834 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18835 | return 0; |
18836 | } | |
18837 | ||
fff8551c | 18838 | line_header_up lh (new line_header ()); |
debd256d | 18839 | |
9c541725 | 18840 | lh->sect_off = sect_off; |
527f3840 JK |
18841 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
18842 | ||
9c541725 | 18843 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 18844 | |
a738430d | 18845 | /* Read in the header. */ |
6e70227d | 18846 | lh->total_length = |
c764a876 DE |
18847 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
18848 | &bytes_read, &offset_size); | |
debd256d | 18849 | line_ptr += bytes_read; |
3019eac3 | 18850 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 18851 | { |
4d3c2250 | 18852 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18853 | return 0; |
18854 | } | |
18855 | lh->statement_program_end = line_ptr + lh->total_length; | |
18856 | lh->version = read_2_bytes (abfd, line_ptr); | |
18857 | line_ptr += 2; | |
43988095 | 18858 | if (lh->version > 5) |
cd366ee8 DE |
18859 | { |
18860 | /* This is a version we don't understand. The format could have | |
18861 | changed in ways we don't handle properly so just punt. */ | |
18862 | complaint (&symfile_complaints, | |
18863 | _("unsupported version in .debug_line section")); | |
18864 | return NULL; | |
18865 | } | |
43988095 JK |
18866 | if (lh->version >= 5) |
18867 | { | |
18868 | gdb_byte segment_selector_size; | |
18869 | ||
18870 | /* Skip address size. */ | |
18871 | read_1_byte (abfd, line_ptr); | |
18872 | line_ptr += 1; | |
18873 | ||
18874 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18875 | line_ptr += 1; | |
18876 | if (segment_selector_size != 0) | |
18877 | { | |
18878 | complaint (&symfile_complaints, | |
18879 | _("unsupported segment selector size %u " | |
18880 | "in .debug_line section"), | |
18881 | segment_selector_size); | |
18882 | return NULL; | |
18883 | } | |
18884 | } | |
c764a876 DE |
18885 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18886 | line_ptr += offset_size; | |
debd256d JB |
18887 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18888 | line_ptr += 1; | |
2dc7f7b3 TT |
18889 | if (lh->version >= 4) |
18890 | { | |
18891 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18892 | line_ptr += 1; | |
18893 | } | |
18894 | else | |
18895 | lh->maximum_ops_per_instruction = 1; | |
18896 | ||
18897 | if (lh->maximum_ops_per_instruction == 0) | |
18898 | { | |
18899 | lh->maximum_ops_per_instruction = 1; | |
18900 | complaint (&symfile_complaints, | |
3e43a32a MS |
18901 | _("invalid maximum_ops_per_instruction " |
18902 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18903 | } |
18904 | ||
debd256d JB |
18905 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18906 | line_ptr += 1; | |
18907 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18908 | line_ptr += 1; | |
18909 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18910 | line_ptr += 1; | |
18911 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18912 | line_ptr += 1; | |
fff8551c | 18913 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18914 | |
18915 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18916 | for (i = 1; i < lh->opcode_base; ++i) | |
18917 | { | |
18918 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18919 | line_ptr += 1; | |
18920 | } | |
18921 | ||
43988095 | 18922 | if (lh->version >= 5) |
debd256d | 18923 | { |
43988095 | 18924 | /* Read directory table. */ |
fff8551c PA |
18925 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18926 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18927 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18928 | unsigned int length) |
18929 | { | |
18930 | lh->add_include_dir (name); | |
18931 | }); | |
debd256d | 18932 | |
43988095 | 18933 | /* Read file name table. */ |
fff8551c PA |
18934 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18935 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18936 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18937 | unsigned int length) |
18938 | { | |
ecfb656c | 18939 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18940 | }); |
43988095 JK |
18941 | } |
18942 | else | |
debd256d | 18943 | { |
43988095 JK |
18944 | /* Read directory table. */ |
18945 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18946 | { | |
18947 | line_ptr += bytes_read; | |
fff8551c | 18948 | lh->add_include_dir (cur_dir); |
43988095 | 18949 | } |
debd256d JB |
18950 | line_ptr += bytes_read; |
18951 | ||
43988095 JK |
18952 | /* Read file name table. */ |
18953 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18954 | { | |
ecfb656c PA |
18955 | unsigned int mod_time, length; |
18956 | dir_index d_index; | |
43988095 JK |
18957 | |
18958 | line_ptr += bytes_read; | |
ecfb656c | 18959 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
18960 | line_ptr += bytes_read; |
18961 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18962 | line_ptr += bytes_read; | |
18963 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18964 | line_ptr += bytes_read; | |
18965 | ||
ecfb656c | 18966 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
18967 | } |
18968 | line_ptr += bytes_read; | |
debd256d | 18969 | } |
6e70227d | 18970 | lh->statement_program_start = line_ptr; |
debd256d | 18971 | |
3019eac3 | 18972 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 18973 | complaint (&symfile_complaints, |
3e43a32a MS |
18974 | _("line number info header doesn't " |
18975 | "fit in `.debug_line' section")); | |
debd256d | 18976 | |
debd256d JB |
18977 | return lh; |
18978 | } | |
c906108c | 18979 | |
c6da4cef DE |
18980 | /* Subroutine of dwarf_decode_lines to simplify it. |
18981 | Return the file name of the psymtab for included file FILE_INDEX | |
18982 | in line header LH of PST. | |
18983 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18984 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
18985 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
18986 | ||
18987 | The function creates dangling cleanup registration. */ | |
c6da4cef | 18988 | |
d521ce57 | 18989 | static const char * |
c6da4cef DE |
18990 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
18991 | const struct partial_symtab *pst, | |
18992 | const char *comp_dir) | |
18993 | { | |
8c43009f | 18994 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
18995 | const char *include_name = fe.name; |
18996 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
18997 | const char *pst_filename; |
18998 | char *copied_name = NULL; | |
c6da4cef DE |
18999 | int file_is_pst; |
19000 | ||
8c43009f | 19001 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
19002 | |
19003 | if (!IS_ABSOLUTE_PATH (include_name) | |
19004 | && (dir_name != NULL || comp_dir != NULL)) | |
19005 | { | |
19006 | /* Avoid creating a duplicate psymtab for PST. | |
19007 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
19008 | Before we do the comparison, however, we need to account | |
19009 | for DIR_NAME and COMP_DIR. | |
19010 | First prepend dir_name (if non-NULL). If we still don't | |
19011 | have an absolute path prepend comp_dir (if non-NULL). | |
19012 | However, the directory we record in the include-file's | |
19013 | psymtab does not contain COMP_DIR (to match the | |
19014 | corresponding symtab(s)). | |
19015 | ||
19016 | Example: | |
19017 | ||
19018 | bash$ cd /tmp | |
19019 | bash$ gcc -g ./hello.c | |
19020 | include_name = "hello.c" | |
19021 | dir_name = "." | |
19022 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
19023 | DW_AT_name = "./hello.c" |
19024 | ||
19025 | */ | |
c6da4cef DE |
19026 | |
19027 | if (dir_name != NULL) | |
19028 | { | |
d521ce57 TT |
19029 | char *tem = concat (dir_name, SLASH_STRING, |
19030 | include_name, (char *)NULL); | |
19031 | ||
19032 | make_cleanup (xfree, tem); | |
19033 | include_name = tem; | |
c6da4cef | 19034 | include_name_to_compare = include_name; |
c6da4cef DE |
19035 | } |
19036 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
19037 | { | |
d521ce57 TT |
19038 | char *tem = concat (comp_dir, SLASH_STRING, |
19039 | include_name, (char *)NULL); | |
19040 | ||
19041 | make_cleanup (xfree, tem); | |
19042 | include_name_to_compare = tem; | |
c6da4cef DE |
19043 | } |
19044 | } | |
19045 | ||
19046 | pst_filename = pst->filename; | |
19047 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
19048 | { | |
72b9f47f TT |
19049 | copied_name = concat (pst->dirname, SLASH_STRING, |
19050 | pst_filename, (char *)NULL); | |
19051 | pst_filename = copied_name; | |
c6da4cef DE |
19052 | } |
19053 | ||
1e3fad37 | 19054 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 19055 | |
72b9f47f TT |
19056 | if (copied_name != NULL) |
19057 | xfree (copied_name); | |
c6da4cef DE |
19058 | |
19059 | if (file_is_pst) | |
19060 | return NULL; | |
19061 | return include_name; | |
19062 | } | |
19063 | ||
d9b3de22 DE |
19064 | /* State machine to track the state of the line number program. */ |
19065 | ||
6f77053d | 19066 | class lnp_state_machine |
d9b3de22 | 19067 | { |
6f77053d PA |
19068 | public: |
19069 | /* Initialize a machine state for the start of a line number | |
19070 | program. */ | |
19071 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
19072 | ||
8c43009f PA |
19073 | file_entry *current_file () |
19074 | { | |
19075 | /* lh->file_names is 0-based, but the file name numbers in the | |
19076 | statement program are 1-based. */ | |
6f77053d PA |
19077 | return m_line_header->file_name_at (m_file); |
19078 | } | |
19079 | ||
19080 | /* Record the line in the state machine. END_SEQUENCE is true if | |
19081 | we're processing the end of a sequence. */ | |
19082 | void record_line (bool end_sequence); | |
19083 | ||
19084 | /* Check address and if invalid nop-out the rest of the lines in this | |
19085 | sequence. */ | |
19086 | void check_line_address (struct dwarf2_cu *cu, | |
19087 | const gdb_byte *line_ptr, | |
19088 | CORE_ADDR lowpc, CORE_ADDR address); | |
19089 | ||
19090 | void handle_set_discriminator (unsigned int discriminator) | |
19091 | { | |
19092 | m_discriminator = discriminator; | |
19093 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
19094 | } | |
19095 | ||
19096 | /* Handle DW_LNE_set_address. */ | |
19097 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
19098 | { | |
19099 | m_op_index = 0; | |
19100 | address += baseaddr; | |
19101 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
19102 | } | |
19103 | ||
19104 | /* Handle DW_LNS_advance_pc. */ | |
19105 | void handle_advance_pc (CORE_ADDR adjust); | |
19106 | ||
19107 | /* Handle a special opcode. */ | |
19108 | void handle_special_opcode (unsigned char op_code); | |
19109 | ||
19110 | /* Handle DW_LNS_advance_line. */ | |
19111 | void handle_advance_line (int line_delta) | |
19112 | { | |
19113 | advance_line (line_delta); | |
19114 | } | |
19115 | ||
19116 | /* Handle DW_LNS_set_file. */ | |
19117 | void handle_set_file (file_name_index file); | |
19118 | ||
19119 | /* Handle DW_LNS_negate_stmt. */ | |
19120 | void handle_negate_stmt () | |
19121 | { | |
19122 | m_is_stmt = !m_is_stmt; | |
19123 | } | |
19124 | ||
19125 | /* Handle DW_LNS_const_add_pc. */ | |
19126 | void handle_const_add_pc (); | |
19127 | ||
19128 | /* Handle DW_LNS_fixed_advance_pc. */ | |
19129 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
19130 | { | |
19131 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19132 | m_op_index = 0; | |
19133 | } | |
19134 | ||
19135 | /* Handle DW_LNS_copy. */ | |
19136 | void handle_copy () | |
19137 | { | |
19138 | record_line (false); | |
19139 | m_discriminator = 0; | |
19140 | } | |
19141 | ||
19142 | /* Handle DW_LNE_end_sequence. */ | |
19143 | void handle_end_sequence () | |
19144 | { | |
19145 | m_record_line_callback = ::record_line; | |
19146 | } | |
19147 | ||
19148 | private: | |
19149 | /* Advance the line by LINE_DELTA. */ | |
19150 | void advance_line (int line_delta) | |
19151 | { | |
19152 | m_line += line_delta; | |
19153 | ||
19154 | if (line_delta != 0) | |
19155 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
19156 | } |
19157 | ||
6f77053d PA |
19158 | gdbarch *m_gdbarch; |
19159 | ||
19160 | /* True if we're recording lines. | |
19161 | Otherwise we're building partial symtabs and are just interested in | |
19162 | finding include files mentioned by the line number program. */ | |
19163 | bool m_record_lines_p; | |
19164 | ||
8c43009f | 19165 | /* The line number header. */ |
6f77053d | 19166 | line_header *m_line_header; |
8c43009f | 19167 | |
6f77053d PA |
19168 | /* These are part of the standard DWARF line number state machine, |
19169 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 19170 | |
6f77053d | 19171 | unsigned char m_op_index = 0; |
8c43009f | 19172 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
19173 | file_name_index m_file = (file_name_index) 1; |
19174 | unsigned int m_line = 1; | |
19175 | ||
19176 | /* These are initialized in the constructor. */ | |
19177 | ||
19178 | CORE_ADDR m_address; | |
19179 | bool m_is_stmt; | |
19180 | unsigned int m_discriminator; | |
d9b3de22 DE |
19181 | |
19182 | /* Additional bits of state we need to track. */ | |
19183 | ||
19184 | /* The last file that we called dwarf2_start_subfile for. | |
19185 | This is only used for TLLs. */ | |
6f77053d | 19186 | unsigned int m_last_file = 0; |
d9b3de22 | 19187 | /* The last file a line number was recorded for. */ |
6f77053d | 19188 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
19189 | |
19190 | /* The function to call to record a line. */ | |
6f77053d | 19191 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
19192 | |
19193 | /* The last line number that was recorded, used to coalesce | |
19194 | consecutive entries for the same line. This can happen, for | |
19195 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
19196 | unsigned int m_last_line = 0; |
19197 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 19198 | }; |
d9b3de22 | 19199 | |
6f77053d PA |
19200 | void |
19201 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
19202 | { | |
19203 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
19204 | / m_line_header->maximum_ops_per_instruction) | |
19205 | * m_line_header->minimum_instruction_length); | |
19206 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19207 | m_op_index = ((m_op_index + adjust) | |
19208 | % m_line_header->maximum_ops_per_instruction); | |
19209 | } | |
d9b3de22 | 19210 | |
6f77053d PA |
19211 | void |
19212 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 19213 | { |
6f77053d PA |
19214 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
19215 | CORE_ADDR addr_adj = (((m_op_index | |
19216 | + (adj_opcode / m_line_header->line_range)) | |
19217 | / m_line_header->maximum_ops_per_instruction) | |
19218 | * m_line_header->minimum_instruction_length); | |
19219 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19220 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
19221 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 19222 | |
6f77053d PA |
19223 | int line_delta = (m_line_header->line_base |
19224 | + (adj_opcode % m_line_header->line_range)); | |
19225 | advance_line (line_delta); | |
19226 | record_line (false); | |
19227 | m_discriminator = 0; | |
19228 | } | |
d9b3de22 | 19229 | |
6f77053d PA |
19230 | void |
19231 | lnp_state_machine::handle_set_file (file_name_index file) | |
19232 | { | |
19233 | m_file = file; | |
19234 | ||
19235 | const file_entry *fe = current_file (); | |
19236 | if (fe == NULL) | |
19237 | dwarf2_debug_line_missing_file_complaint (); | |
19238 | else if (m_record_lines_p) | |
19239 | { | |
19240 | const char *dir = fe->include_dir (m_line_header); | |
19241 | ||
19242 | m_last_subfile = current_subfile; | |
19243 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
19244 | dwarf2_start_subfile (fe->name, dir); | |
19245 | } | |
19246 | } | |
19247 | ||
19248 | void | |
19249 | lnp_state_machine::handle_const_add_pc () | |
19250 | { | |
19251 | CORE_ADDR adjust | |
19252 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
19253 | ||
19254 | CORE_ADDR addr_adj | |
19255 | = (((m_op_index + adjust) | |
19256 | / m_line_header->maximum_ops_per_instruction) | |
19257 | * m_line_header->minimum_instruction_length); | |
19258 | ||
19259 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19260 | m_op_index = ((m_op_index + adjust) | |
19261 | % m_line_header->maximum_ops_per_instruction); | |
19262 | } | |
d9b3de22 | 19263 | |
c91513d8 PP |
19264 | /* Ignore this record_line request. */ |
19265 | ||
19266 | static void | |
19267 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
19268 | { | |
19269 | return; | |
19270 | } | |
19271 | ||
a05a36a5 DE |
19272 | /* Return non-zero if we should add LINE to the line number table. |
19273 | LINE is the line to add, LAST_LINE is the last line that was added, | |
19274 | LAST_SUBFILE is the subfile for LAST_LINE. | |
19275 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
19276 | had a non-zero discriminator. | |
19277 | ||
19278 | We have to be careful in the presence of discriminators. | |
19279 | E.g., for this line: | |
19280 | ||
19281 | for (i = 0; i < 100000; i++); | |
19282 | ||
19283 | clang can emit four line number entries for that one line, | |
19284 | each with a different discriminator. | |
19285 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19286 | ||
19287 | However, we want gdb to coalesce all four entries into one. | |
19288 | Otherwise the user could stepi into the middle of the line and | |
19289 | gdb would get confused about whether the pc really was in the | |
19290 | middle of the line. | |
19291 | ||
19292 | Things are further complicated by the fact that two consecutive | |
19293 | line number entries for the same line is a heuristic used by gcc | |
19294 | to denote the end of the prologue. So we can't just discard duplicate | |
19295 | entries, we have to be selective about it. The heuristic we use is | |
19296 | that we only collapse consecutive entries for the same line if at least | |
19297 | one of those entries has a non-zero discriminator. PR 17276. | |
19298 | ||
19299 | Note: Addresses in the line number state machine can never go backwards | |
19300 | within one sequence, thus this coalescing is ok. */ | |
19301 | ||
19302 | static int | |
19303 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
19304 | int line_has_non_zero_discriminator, | |
19305 | struct subfile *last_subfile) | |
19306 | { | |
19307 | if (current_subfile != last_subfile) | |
19308 | return 1; | |
19309 | if (line != last_line) | |
19310 | return 1; | |
19311 | /* Same line for the same file that we've seen already. | |
19312 | As a last check, for pr 17276, only record the line if the line | |
19313 | has never had a non-zero discriminator. */ | |
19314 | if (!line_has_non_zero_discriminator) | |
19315 | return 1; | |
19316 | return 0; | |
19317 | } | |
19318 | ||
252a6764 DE |
19319 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
19320 | in the line table of subfile SUBFILE. */ | |
19321 | ||
19322 | static void | |
d9b3de22 DE |
19323 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
19324 | unsigned int line, CORE_ADDR address, | |
19325 | record_line_ftype p_record_line) | |
252a6764 DE |
19326 | { |
19327 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19328 | ||
27e0867f DE |
19329 | if (dwarf_line_debug) |
19330 | { | |
19331 | fprintf_unfiltered (gdb_stdlog, | |
19332 | "Recording line %u, file %s, address %s\n", | |
19333 | line, lbasename (subfile->name), | |
19334 | paddress (gdbarch, address)); | |
19335 | } | |
19336 | ||
d5962de5 | 19337 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
19338 | } |
19339 | ||
19340 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19341 | Mark the end of a set of line number records. | |
d9b3de22 | 19342 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19343 | If SUBFILE is NULL the request is ignored. */ |
19344 | ||
19345 | static void | |
19346 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
19347 | CORE_ADDR address, record_line_ftype p_record_line) | |
19348 | { | |
27e0867f DE |
19349 | if (subfile == NULL) |
19350 | return; | |
19351 | ||
19352 | if (dwarf_line_debug) | |
19353 | { | |
19354 | fprintf_unfiltered (gdb_stdlog, | |
19355 | "Finishing current line, file %s, address %s\n", | |
19356 | lbasename (subfile->name), | |
19357 | paddress (gdbarch, address)); | |
19358 | } | |
19359 | ||
d9b3de22 DE |
19360 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
19361 | } | |
19362 | ||
6f77053d PA |
19363 | void |
19364 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19365 | { |
d9b3de22 DE |
19366 | if (dwarf_line_debug) |
19367 | { | |
19368 | fprintf_unfiltered (gdb_stdlog, | |
19369 | "Processing actual line %u: file %u," | |
19370 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
19371 | m_line, to_underlying (m_file), |
19372 | paddress (m_gdbarch, m_address), | |
19373 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
19374 | } |
19375 | ||
6f77053d | 19376 | file_entry *fe = current_file (); |
8c43009f PA |
19377 | |
19378 | if (fe == NULL) | |
d9b3de22 DE |
19379 | dwarf2_debug_line_missing_file_complaint (); |
19380 | /* For now we ignore lines not starting on an instruction boundary. | |
19381 | But not when processing end_sequence for compatibility with the | |
19382 | previous version of the code. */ | |
6f77053d | 19383 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 19384 | { |
8c43009f | 19385 | fe->included_p = 1; |
6f77053d | 19386 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 19387 | { |
6f77053d | 19388 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 19389 | { |
6f77053d PA |
19390 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
19391 | m_address, m_record_line_callback); | |
d9b3de22 DE |
19392 | } |
19393 | ||
19394 | if (!end_sequence) | |
19395 | { | |
6f77053d PA |
19396 | if (dwarf_record_line_p (m_line, m_last_line, |
19397 | m_line_has_non_zero_discriminator, | |
19398 | m_last_subfile)) | |
d9b3de22 | 19399 | { |
6f77053d PA |
19400 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
19401 | m_line, m_address, | |
19402 | m_record_line_callback); | |
d9b3de22 | 19403 | } |
6f77053d PA |
19404 | m_last_subfile = current_subfile; |
19405 | m_last_line = m_line; | |
d9b3de22 DE |
19406 | } |
19407 | } | |
19408 | } | |
19409 | } | |
19410 | ||
6f77053d PA |
19411 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
19412 | bool record_lines_p) | |
d9b3de22 | 19413 | { |
6f77053d PA |
19414 | m_gdbarch = arch; |
19415 | m_record_lines_p = record_lines_p; | |
19416 | m_line_header = lh; | |
d9b3de22 | 19417 | |
6f77053d | 19418 | m_record_line_callback = ::record_line; |
d9b3de22 | 19419 | |
d9b3de22 DE |
19420 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
19421 | was a line entry for it so that the backend has a chance to adjust it | |
19422 | and also record it in case it needs it. This is currently used by MIPS | |
19423 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
19424 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
19425 | m_is_stmt = lh->default_is_stmt; | |
19426 | m_discriminator = 0; | |
252a6764 DE |
19427 | } |
19428 | ||
6f77053d PA |
19429 | void |
19430 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
19431 | const gdb_byte *line_ptr, | |
19432 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
19433 | { |
19434 | /* If address < lowpc then it's not a usable value, it's outside the | |
19435 | pc range of the CU. However, we restrict the test to only address | |
19436 | values of zero to preserve GDB's previous behaviour which is to | |
19437 | handle the specific case of a function being GC'd by the linker. */ | |
19438 | ||
19439 | if (address == 0 && address < lowpc) | |
19440 | { | |
19441 | /* This line table is for a function which has been | |
19442 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
19443 | ||
19444 | struct objfile *objfile = cu->objfile; | |
19445 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
19446 | ||
19447 | complaint (&symfile_complaints, | |
19448 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
19449 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
19450 | m_record_line_callback = noop_record_line; |
19451 | /* Note: record_line_callback is left as noop_record_line until | |
19452 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
19453 | } |
19454 | } | |
19455 | ||
f3f5162e | 19456 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
19457 | Process the line number information in LH. |
19458 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
19459 | program in order to set included_p for every referenced header. */ | |
debd256d | 19460 | |
c906108c | 19461 | static void |
43f3e411 DE |
19462 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
19463 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 19464 | { |
d521ce57 TT |
19465 | const gdb_byte *line_ptr, *extended_end; |
19466 | const gdb_byte *line_end; | |
a8c50c1f | 19467 | unsigned int bytes_read, extended_len; |
699ca60a | 19468 | unsigned char op_code, extended_op; |
e142c38c DJ |
19469 | CORE_ADDR baseaddr; |
19470 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 19471 | bfd *abfd = objfile->obfd; |
fbf65064 | 19472 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
19473 | /* True if we're recording line info (as opposed to building partial |
19474 | symtabs and just interested in finding include files mentioned by | |
19475 | the line number program). */ | |
19476 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
19477 | |
19478 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19479 | |
debd256d JB |
19480 | line_ptr = lh->statement_program_start; |
19481 | line_end = lh->statement_program_end; | |
c906108c SS |
19482 | |
19483 | /* Read the statement sequences until there's nothing left. */ | |
19484 | while (line_ptr < line_end) | |
19485 | { | |
6f77053d PA |
19486 | /* The DWARF line number program state machine. Reset the state |
19487 | machine at the start of each sequence. */ | |
19488 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
19489 | bool end_sequence = false; | |
d9b3de22 | 19490 | |
8c43009f | 19491 | if (record_lines_p) |
c906108c | 19492 | { |
8c43009f PA |
19493 | /* Start a subfile for the current file of the state |
19494 | machine. */ | |
19495 | const file_entry *fe = state_machine.current_file (); | |
19496 | ||
19497 | if (fe != NULL) | |
19498 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
19499 | } |
19500 | ||
a738430d | 19501 | /* Decode the table. */ |
d9b3de22 | 19502 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
19503 | { |
19504 | op_code = read_1_byte (abfd, line_ptr); | |
19505 | line_ptr += 1; | |
9aa1fe7e | 19506 | |
debd256d | 19507 | if (op_code >= lh->opcode_base) |
6e70227d | 19508 | { |
8e07a239 | 19509 | /* Special opcode. */ |
6f77053d | 19510 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
19511 | } |
19512 | else switch (op_code) | |
c906108c SS |
19513 | { |
19514 | case DW_LNS_extended_op: | |
3e43a32a MS |
19515 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
19516 | &bytes_read); | |
473b7be6 | 19517 | line_ptr += bytes_read; |
a8c50c1f | 19518 | extended_end = line_ptr + extended_len; |
c906108c SS |
19519 | extended_op = read_1_byte (abfd, line_ptr); |
19520 | line_ptr += 1; | |
19521 | switch (extended_op) | |
19522 | { | |
19523 | case DW_LNE_end_sequence: | |
6f77053d PA |
19524 | state_machine.handle_end_sequence (); |
19525 | end_sequence = true; | |
c906108c SS |
19526 | break; |
19527 | case DW_LNE_set_address: | |
d9b3de22 DE |
19528 | { |
19529 | CORE_ADDR address | |
19530 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 19531 | line_ptr += bytes_read; |
6f77053d PA |
19532 | |
19533 | state_machine.check_line_address (cu, line_ptr, | |
19534 | lowpc, address); | |
19535 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 19536 | } |
c906108c SS |
19537 | break; |
19538 | case DW_LNE_define_file: | |
debd256d | 19539 | { |
d521ce57 | 19540 | const char *cur_file; |
ecfb656c PA |
19541 | unsigned int mod_time, length; |
19542 | dir_index dindex; | |
6e70227d | 19543 | |
3e43a32a MS |
19544 | cur_file = read_direct_string (abfd, line_ptr, |
19545 | &bytes_read); | |
debd256d | 19546 | line_ptr += bytes_read; |
ecfb656c | 19547 | dindex = (dir_index) |
debd256d JB |
19548 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
19549 | line_ptr += bytes_read; | |
19550 | mod_time = | |
19551 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19552 | line_ptr += bytes_read; | |
19553 | length = | |
19554 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19555 | line_ptr += bytes_read; | |
ecfb656c | 19556 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 19557 | } |
c906108c | 19558 | break; |
d0c6ba3d | 19559 | case DW_LNE_set_discriminator: |
6f77053d PA |
19560 | { |
19561 | /* The discriminator is not interesting to the | |
19562 | debugger; just ignore it. We still need to | |
19563 | check its value though: | |
19564 | if there are consecutive entries for the same | |
19565 | (non-prologue) line we want to coalesce them. | |
19566 | PR 17276. */ | |
19567 | unsigned int discr | |
19568 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19569 | line_ptr += bytes_read; | |
19570 | ||
19571 | state_machine.handle_set_discriminator (discr); | |
19572 | } | |
d0c6ba3d | 19573 | break; |
c906108c | 19574 | default: |
4d3c2250 | 19575 | complaint (&symfile_complaints, |
e2e0b3e5 | 19576 | _("mangled .debug_line section")); |
debd256d | 19577 | return; |
c906108c | 19578 | } |
a8c50c1f DJ |
19579 | /* Make sure that we parsed the extended op correctly. If e.g. |
19580 | we expected a different address size than the producer used, | |
19581 | we may have read the wrong number of bytes. */ | |
19582 | if (line_ptr != extended_end) | |
19583 | { | |
19584 | complaint (&symfile_complaints, | |
19585 | _("mangled .debug_line section")); | |
19586 | return; | |
19587 | } | |
c906108c SS |
19588 | break; |
19589 | case DW_LNS_copy: | |
6f77053d | 19590 | state_machine.handle_copy (); |
c906108c SS |
19591 | break; |
19592 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
19593 | { |
19594 | CORE_ADDR adjust | |
19595 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 19596 | line_ptr += bytes_read; |
6f77053d PA |
19597 | |
19598 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 19599 | } |
c906108c SS |
19600 | break; |
19601 | case DW_LNS_advance_line: | |
a05a36a5 DE |
19602 | { |
19603 | int line_delta | |
19604 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 19605 | line_ptr += bytes_read; |
6f77053d PA |
19606 | |
19607 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 19608 | } |
c906108c SS |
19609 | break; |
19610 | case DW_LNS_set_file: | |
d9b3de22 | 19611 | { |
6f77053d | 19612 | file_name_index file |
ecfb656c PA |
19613 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
19614 | &bytes_read); | |
d9b3de22 | 19615 | line_ptr += bytes_read; |
8c43009f | 19616 | |
6f77053d | 19617 | state_machine.handle_set_file (file); |
d9b3de22 | 19618 | } |
c906108c SS |
19619 | break; |
19620 | case DW_LNS_set_column: | |
0ad93d4f | 19621 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
19622 | line_ptr += bytes_read; |
19623 | break; | |
19624 | case DW_LNS_negate_stmt: | |
6f77053d | 19625 | state_machine.handle_negate_stmt (); |
c906108c SS |
19626 | break; |
19627 | case DW_LNS_set_basic_block: | |
c906108c | 19628 | break; |
c2c6d25f JM |
19629 | /* Add to the address register of the state machine the |
19630 | address increment value corresponding to special opcode | |
a738430d MK |
19631 | 255. I.e., this value is scaled by the minimum |
19632 | instruction length since special opcode 255 would have | |
b021a221 | 19633 | scaled the increment. */ |
c906108c | 19634 | case DW_LNS_const_add_pc: |
6f77053d | 19635 | state_machine.handle_const_add_pc (); |
c906108c SS |
19636 | break; |
19637 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 19638 | { |
6f77053d | 19639 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 19640 | line_ptr += 2; |
6f77053d PA |
19641 | |
19642 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 19643 | } |
c906108c | 19644 | break; |
9aa1fe7e | 19645 | default: |
a738430d MK |
19646 | { |
19647 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 19648 | int i; |
a738430d | 19649 | |
debd256d | 19650 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
19651 | { |
19652 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19653 | line_ptr += bytes_read; | |
19654 | } | |
19655 | } | |
c906108c SS |
19656 | } |
19657 | } | |
d9b3de22 DE |
19658 | |
19659 | if (!end_sequence) | |
19660 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
19661 | ||
19662 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
19663 | in which case we still finish recording the last line). */ | |
6f77053d | 19664 | state_machine.record_line (true); |
c906108c | 19665 | } |
f3f5162e DE |
19666 | } |
19667 | ||
19668 | /* Decode the Line Number Program (LNP) for the given line_header | |
19669 | structure and CU. The actual information extracted and the type | |
19670 | of structures created from the LNP depends on the value of PST. | |
19671 | ||
19672 | 1. If PST is NULL, then this procedure uses the data from the program | |
19673 | to create all necessary symbol tables, and their linetables. | |
19674 | ||
19675 | 2. If PST is not NULL, this procedure reads the program to determine | |
19676 | the list of files included by the unit represented by PST, and | |
19677 | builds all the associated partial symbol tables. | |
19678 | ||
19679 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
19680 | It is used for relative paths in the line table. | |
19681 | NOTE: When processing partial symtabs (pst != NULL), | |
19682 | comp_dir == pst->dirname. | |
19683 | ||
19684 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
19685 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
19686 | symtab we don't use it in the name of the psymtabs we create. | |
19687 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
19688 | A good testcase for this is mb-inline.exp. |
19689 | ||
527f3840 JK |
19690 | LOWPC is the lowest address in CU (or 0 if not known). |
19691 | ||
19692 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
19693 | for its PC<->lines mapping information. Otherwise only the filename | |
19694 | table is read in. */ | |
f3f5162e DE |
19695 | |
19696 | static void | |
19697 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 19698 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 19699 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
19700 | { |
19701 | struct objfile *objfile = cu->objfile; | |
19702 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 19703 | |
527f3840 JK |
19704 | if (decode_mapping) |
19705 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
19706 | |
19707 | if (decode_for_pst_p) | |
19708 | { | |
19709 | int file_index; | |
19710 | ||
19711 | /* Now that we're done scanning the Line Header Program, we can | |
19712 | create the psymtab of each included file. */ | |
fff8551c | 19713 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
19714 | if (lh->file_names[file_index].included_p == 1) |
19715 | { | |
d521ce57 | 19716 | const char *include_name = |
c6da4cef DE |
19717 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
19718 | if (include_name != NULL) | |
aaa75496 JB |
19719 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
19720 | } | |
19721 | } | |
cb1df416 DJ |
19722 | else |
19723 | { | |
19724 | /* Make sure a symtab is created for every file, even files | |
19725 | which contain only variables (i.e. no code with associated | |
19726 | line numbers). */ | |
43f3e411 | 19727 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 19728 | int i; |
cb1df416 | 19729 | |
fff8551c | 19730 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 19731 | { |
8c43009f | 19732 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 19733 | |
8c43009f | 19734 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 19735 | |
cb1df416 | 19736 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
19737 | { |
19738 | current_subfile->symtab | |
19739 | = allocate_symtab (cust, current_subfile->name); | |
19740 | } | |
8c43009f | 19741 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
19742 | } |
19743 | } | |
c906108c SS |
19744 | } |
19745 | ||
19746 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
19747 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 19748 | or NULL if not known. |
c906108c SS |
19749 | This routine tries to keep line numbers from identical absolute and |
19750 | relative file names in a common subfile. | |
19751 | ||
19752 | Using the `list' example from the GDB testsuite, which resides in | |
19753 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
19754 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
19755 | ||
c5aa993b | 19756 | DW_AT_name: /srcdir/list0.c |
4d663531 | 19757 | DW_AT_comp_dir: /compdir |
357e46e7 | 19758 | files.files[0].name: list0.h |
c5aa993b | 19759 | files.files[0].dir: /srcdir |
357e46e7 | 19760 | files.files[1].name: list0.c |
c5aa993b | 19761 | files.files[1].dir: /srcdir |
c906108c SS |
19762 | |
19763 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
19764 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
19765 | start_subfile will ensure that this happens provided that we pass the | |
19766 | concatenation of files.files[1].dir and files.files[1].name as the | |
19767 | subfile's name. */ | |
c906108c SS |
19768 | |
19769 | static void | |
4d663531 | 19770 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 19771 | { |
d521ce57 | 19772 | char *copy = NULL; |
4f1520fb | 19773 | |
4d663531 | 19774 | /* In order not to lose the line information directory, |
4f1520fb FR |
19775 | we concatenate it to the filename when it makes sense. |
19776 | Note that the Dwarf3 standard says (speaking of filenames in line | |
19777 | information): ``The directory index is ignored for file names | |
19778 | that represent full path names''. Thus ignoring dirname in the | |
19779 | `else' branch below isn't an issue. */ | |
c906108c | 19780 | |
d5166ae1 | 19781 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
19782 | { |
19783 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
19784 | filename = copy; | |
19785 | } | |
c906108c | 19786 | |
4d663531 | 19787 | start_subfile (filename); |
4f1520fb | 19788 | |
d521ce57 TT |
19789 | if (copy != NULL) |
19790 | xfree (copy); | |
c906108c SS |
19791 | } |
19792 | ||
f4dc4d17 DE |
19793 | /* Start a symtab for DWARF. |
19794 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
19795 | ||
43f3e411 | 19796 | static struct compunit_symtab * |
f4dc4d17 | 19797 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 19798 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 19799 | { |
43f3e411 | 19800 | struct compunit_symtab *cust |
5ffa0793 | 19801 | = start_symtab (cu->objfile, name, comp_dir, low_pc, cu->language); |
43f3e411 | 19802 | |
f4dc4d17 DE |
19803 | record_debugformat ("DWARF 2"); |
19804 | record_producer (cu->producer); | |
19805 | ||
19806 | /* We assume that we're processing GCC output. */ | |
19807 | processing_gcc_compilation = 2; | |
19808 | ||
4d4ec4e5 | 19809 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
19810 | |
19811 | return cust; | |
f4dc4d17 DE |
19812 | } |
19813 | ||
4c2df51b DJ |
19814 | static void |
19815 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 19816 | struct dwarf2_cu *cu) |
4c2df51b | 19817 | { |
e7c27a73 DJ |
19818 | struct objfile *objfile = cu->objfile; |
19819 | struct comp_unit_head *cu_header = &cu->header; | |
19820 | ||
4c2df51b DJ |
19821 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
19822 | code here to turn a symbol with DW_AT_external and a | |
19823 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
19824 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
19825 | with some versions of binutils) where shared libraries could have | |
19826 | relocations against symbols in their debug information - the | |
19827 | minimal symbol would have the right address, but the debug info | |
19828 | would not. It's no longer necessary, because we will explicitly | |
19829 | apply relocations when we read in the debug information now. */ | |
19830 | ||
19831 | /* A DW_AT_location attribute with no contents indicates that a | |
19832 | variable has been optimized away. */ | |
19833 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
19834 | { | |
f1e6e072 | 19835 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
19836 | return; |
19837 | } | |
19838 | ||
19839 | /* Handle one degenerate form of location expression specially, to | |
19840 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
19841 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
19842 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
19843 | |
19844 | if (attr_form_is_block (attr) | |
3019eac3 DE |
19845 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
19846 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
19847 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
19848 | && (DW_BLOCK (attr)->size | |
19849 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 19850 | { |
891d2f0b | 19851 | unsigned int dummy; |
4c2df51b | 19852 | |
3019eac3 DE |
19853 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
19854 | SYMBOL_VALUE_ADDRESS (sym) = | |
19855 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
19856 | else | |
19857 | SYMBOL_VALUE_ADDRESS (sym) = | |
19858 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 19859 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
19860 | fixup_symbol_section (sym, objfile); |
19861 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
19862 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
19863 | return; |
19864 | } | |
19865 | ||
19866 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
19867 | expression evaluator, and use LOC_COMPUTED only when necessary | |
19868 | (i.e. when the value of a register or memory location is | |
19869 | referenced, or a thread-local block, etc.). Then again, it might | |
19870 | not be worthwhile. I'm assuming that it isn't unless performance | |
19871 | or memory numbers show me otherwise. */ | |
19872 | ||
f1e6e072 | 19873 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19874 | |
f1e6e072 | 19875 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19876 | cu->has_loclist = 1; |
4c2df51b DJ |
19877 | } |
19878 | ||
c906108c SS |
19879 | /* Given a pointer to a DWARF information entry, figure out if we need |
19880 | to make a symbol table entry for it, and if so, create a new entry | |
19881 | and return a pointer to it. | |
19882 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19883 | used the passed type. |
19884 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19885 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19886 | |
19887 | static struct symbol * | |
34eaf542 TT |
19888 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19889 | struct symbol *space) | |
c906108c | 19890 | { |
e7c27a73 | 19891 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19892 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19893 | struct symbol *sym = NULL; |
15d034d0 | 19894 | const char *name; |
c906108c SS |
19895 | struct attribute *attr = NULL; |
19896 | struct attribute *attr2 = NULL; | |
e142c38c | 19897 | CORE_ADDR baseaddr; |
e37fd15a SW |
19898 | struct pending **list_to_add = NULL; |
19899 | ||
edb3359d | 19900 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19901 | |
19902 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19903 | |
94af9270 | 19904 | name = dwarf2_name (die, cu); |
c906108c SS |
19905 | if (name) |
19906 | { | |
94af9270 | 19907 | const char *linkagename; |
34eaf542 | 19908 | int suppress_add = 0; |
94af9270 | 19909 | |
34eaf542 TT |
19910 | if (space) |
19911 | sym = space; | |
19912 | else | |
e623cf5d | 19913 | sym = allocate_symbol (objfile); |
c906108c | 19914 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19915 | |
19916 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19917 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19918 | linkagename = dwarf2_physname (name, die, cu); |
19919 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19920 | |
f55ee35c JK |
19921 | /* Fortran does not have mangling standard and the mangling does differ |
19922 | between gfortran, iFort etc. */ | |
19923 | if (cu->language == language_fortran | |
b250c185 | 19924 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19925 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19926 | dwarf2_full_name (name, die, cu), |
29df156d | 19927 | NULL); |
f55ee35c | 19928 | |
c906108c | 19929 | /* Default assumptions. |
c5aa993b | 19930 | Use the passed type or decode it from the die. */ |
176620f1 | 19931 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19932 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19933 | if (type != NULL) |
19934 | SYMBOL_TYPE (sym) = type; | |
19935 | else | |
e7c27a73 | 19936 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19937 | attr = dwarf2_attr (die, |
19938 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19939 | cu); | |
c906108c SS |
19940 | if (attr) |
19941 | { | |
19942 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19943 | } | |
cb1df416 | 19944 | |
edb3359d DJ |
19945 | attr = dwarf2_attr (die, |
19946 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19947 | cu); | |
cb1df416 DJ |
19948 | if (attr) |
19949 | { | |
ecfb656c | 19950 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 19951 | struct file_entry *fe; |
9a619af0 | 19952 | |
ecfb656c PA |
19953 | if (cu->line_header != NULL) |
19954 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
19955 | else |
19956 | fe = NULL; | |
19957 | ||
19958 | if (fe == NULL) | |
cb1df416 DJ |
19959 | complaint (&symfile_complaints, |
19960 | _("file index out of range")); | |
8c43009f PA |
19961 | else |
19962 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
19963 | } |
19964 | ||
c906108c SS |
19965 | switch (die->tag) |
19966 | { | |
19967 | case DW_TAG_label: | |
e142c38c | 19968 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 19969 | if (attr) |
3e29f34a MR |
19970 | { |
19971 | CORE_ADDR addr; | |
19972 | ||
19973 | addr = attr_value_as_address (attr); | |
19974 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
19975 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
19976 | } | |
0f5238ed TT |
19977 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
19978 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 19979 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 19980 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
19981 | break; |
19982 | case DW_TAG_subprogram: | |
19983 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19984 | finish_block. */ | |
f1e6e072 | 19985 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 19986 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
19987 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
19988 | || cu->language == language_ada) | |
c906108c | 19989 | { |
2cfa0c8d JB |
19990 | /* Subprograms marked external are stored as a global symbol. |
19991 | Ada subprograms, whether marked external or not, are always | |
19992 | stored as a global symbol, because we want to be able to | |
19993 | access them globally. For instance, we want to be able | |
19994 | to break on a nested subprogram without having to | |
19995 | specify the context. */ | |
e37fd15a | 19996 | list_to_add = &global_symbols; |
c906108c SS |
19997 | } |
19998 | else | |
19999 | { | |
e37fd15a | 20000 | list_to_add = cu->list_in_scope; |
c906108c SS |
20001 | } |
20002 | break; | |
edb3359d DJ |
20003 | case DW_TAG_inlined_subroutine: |
20004 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20005 | finish_block. */ | |
f1e6e072 | 20006 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 20007 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 20008 | list_to_add = cu->list_in_scope; |
edb3359d | 20009 | break; |
34eaf542 TT |
20010 | case DW_TAG_template_value_param: |
20011 | suppress_add = 1; | |
20012 | /* Fall through. */ | |
72929c62 | 20013 | case DW_TAG_constant: |
c906108c | 20014 | case DW_TAG_variable: |
254e6b9e | 20015 | case DW_TAG_member: |
0963b4bd MS |
20016 | /* Compilation with minimal debug info may result in |
20017 | variables with missing type entries. Change the | |
20018 | misleading `void' type to something sensible. */ | |
c906108c | 20019 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 20020 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 20021 | |
e142c38c | 20022 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
20023 | /* In the case of DW_TAG_member, we should only be called for |
20024 | static const members. */ | |
20025 | if (die->tag == DW_TAG_member) | |
20026 | { | |
3863f96c DE |
20027 | /* dwarf2_add_field uses die_is_declaration, |
20028 | so we do the same. */ | |
254e6b9e DE |
20029 | gdb_assert (die_is_declaration (die, cu)); |
20030 | gdb_assert (attr); | |
20031 | } | |
c906108c SS |
20032 | if (attr) |
20033 | { | |
e7c27a73 | 20034 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 20035 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 20036 | if (!suppress_add) |
34eaf542 TT |
20037 | { |
20038 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 20039 | list_to_add = &global_symbols; |
34eaf542 | 20040 | else |
e37fd15a | 20041 | list_to_add = cu->list_in_scope; |
34eaf542 | 20042 | } |
c906108c SS |
20043 | break; |
20044 | } | |
e142c38c | 20045 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
20046 | if (attr) |
20047 | { | |
e7c27a73 | 20048 | var_decode_location (attr, sym, cu); |
e142c38c | 20049 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
20050 | |
20051 | /* Fortran explicitly imports any global symbols to the local | |
20052 | scope by DW_TAG_common_block. */ | |
20053 | if (cu->language == language_fortran && die->parent | |
20054 | && die->parent->tag == DW_TAG_common_block) | |
20055 | attr2 = NULL; | |
20056 | ||
caac4577 JG |
20057 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20058 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
20059 | && !dwarf2_per_objfile->has_section_at_zero) | |
20060 | { | |
20061 | /* When a static variable is eliminated by the linker, | |
20062 | the corresponding debug information is not stripped | |
20063 | out, but the variable address is set to null; | |
20064 | do not add such variables into symbol table. */ | |
20065 | } | |
20066 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 20067 | { |
f55ee35c JK |
20068 | /* Workaround gfortran PR debug/40040 - it uses |
20069 | DW_AT_location for variables in -fPIC libraries which may | |
20070 | get overriden by other libraries/executable and get | |
20071 | a different address. Resolve it by the minimal symbol | |
20072 | which may come from inferior's executable using copy | |
20073 | relocation. Make this workaround only for gfortran as for | |
20074 | other compilers GDB cannot guess the minimal symbol | |
20075 | Fortran mangling kind. */ | |
20076 | if (cu->language == language_fortran && die->parent | |
20077 | && die->parent->tag == DW_TAG_module | |
20078 | && cu->producer | |
28586665 | 20079 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 20080 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 20081 | |
1c809c68 TT |
20082 | /* A variable with DW_AT_external is never static, |
20083 | but it may be block-scoped. */ | |
20084 | list_to_add = (cu->list_in_scope == &file_symbols | |
20085 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 20086 | } |
c906108c | 20087 | else |
e37fd15a | 20088 | list_to_add = cu->list_in_scope; |
c906108c SS |
20089 | } |
20090 | else | |
20091 | { | |
20092 | /* We do not know the address of this symbol. | |
c5aa993b JM |
20093 | If it is an external symbol and we have type information |
20094 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
20095 | The address of the variable will then be determined from | |
20096 | the minimal symbol table whenever the variable is | |
20097 | referenced. */ | |
e142c38c | 20098 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
20099 | |
20100 | /* Fortran explicitly imports any global symbols to the local | |
20101 | scope by DW_TAG_common_block. */ | |
20102 | if (cu->language == language_fortran && die->parent | |
20103 | && die->parent->tag == DW_TAG_common_block) | |
20104 | { | |
20105 | /* SYMBOL_CLASS doesn't matter here because | |
20106 | read_common_block is going to reset it. */ | |
20107 | if (!suppress_add) | |
20108 | list_to_add = cu->list_in_scope; | |
20109 | } | |
20110 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
20111 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 20112 | { |
0fe7935b DJ |
20113 | /* A variable with DW_AT_external is never static, but it |
20114 | may be block-scoped. */ | |
20115 | list_to_add = (cu->list_in_scope == &file_symbols | |
20116 | ? &global_symbols : cu->list_in_scope); | |
20117 | ||
f1e6e072 | 20118 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 20119 | } |
442ddf59 JK |
20120 | else if (!die_is_declaration (die, cu)) |
20121 | { | |
20122 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
20123 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
20124 | if (!suppress_add) |
20125 | list_to_add = cu->list_in_scope; | |
442ddf59 | 20126 | } |
c906108c SS |
20127 | } |
20128 | break; | |
20129 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
20130 | /* If we are inside a function, mark this as an argument. If |
20131 | not, we might be looking at an argument to an inlined function | |
20132 | when we do not have enough information to show inlined frames; | |
20133 | pretend it's a local variable in that case so that the user can | |
20134 | still see it. */ | |
20135 | if (context_stack_depth > 0 | |
20136 | && context_stack[context_stack_depth - 1].name != NULL) | |
20137 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 20138 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
20139 | if (attr) |
20140 | { | |
e7c27a73 | 20141 | var_decode_location (attr, sym, cu); |
c906108c | 20142 | } |
e142c38c | 20143 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
20144 | if (attr) |
20145 | { | |
e7c27a73 | 20146 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20147 | } |
f346a30d | 20148 | |
e37fd15a | 20149 | list_to_add = cu->list_in_scope; |
c906108c SS |
20150 | break; |
20151 | case DW_TAG_unspecified_parameters: | |
20152 | /* From varargs functions; gdb doesn't seem to have any | |
20153 | interest in this information, so just ignore it for now. | |
20154 | (FIXME?) */ | |
20155 | break; | |
34eaf542 TT |
20156 | case DW_TAG_template_type_param: |
20157 | suppress_add = 1; | |
20158 | /* Fall through. */ | |
c906108c | 20159 | case DW_TAG_class_type: |
680b30c7 | 20160 | case DW_TAG_interface_type: |
c906108c SS |
20161 | case DW_TAG_structure_type: |
20162 | case DW_TAG_union_type: | |
72019c9c | 20163 | case DW_TAG_set_type: |
c906108c | 20164 | case DW_TAG_enumeration_type: |
f1e6e072 | 20165 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20166 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 20167 | |
63d06c5c | 20168 | { |
9c37b5ae | 20169 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
20170 | really ever be static objects: otherwise, if you try |
20171 | to, say, break of a class's method and you're in a file | |
20172 | which doesn't mention that class, it won't work unless | |
20173 | the check for all static symbols in lookup_symbol_aux | |
20174 | saves you. See the OtherFileClass tests in | |
20175 | gdb.c++/namespace.exp. */ | |
20176 | ||
e37fd15a | 20177 | if (!suppress_add) |
34eaf542 | 20178 | { |
34eaf542 | 20179 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 20180 | && cu->language == language_cplus |
34eaf542 | 20181 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 20182 | |
64382290 | 20183 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 20184 | ... }" also defines a typedef for "foo". */ |
64382290 | 20185 | if (cu->language == language_cplus |
45280282 | 20186 | || cu->language == language_ada |
c44af4eb TT |
20187 | || cu->language == language_d |
20188 | || cu->language == language_rust) | |
64382290 TT |
20189 | { |
20190 | /* The symbol's name is already allocated along | |
20191 | with this objfile, so we don't need to | |
20192 | duplicate it for the type. */ | |
20193 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
20194 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
20195 | } | |
63d06c5c DC |
20196 | } |
20197 | } | |
c906108c SS |
20198 | break; |
20199 | case DW_TAG_typedef: | |
f1e6e072 | 20200 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 20201 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20202 | list_to_add = cu->list_in_scope; |
63d06c5c | 20203 | break; |
c906108c | 20204 | case DW_TAG_base_type: |
a02abb62 | 20205 | case DW_TAG_subrange_type: |
f1e6e072 | 20206 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20207 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20208 | list_to_add = cu->list_in_scope; |
c906108c SS |
20209 | break; |
20210 | case DW_TAG_enumerator: | |
e142c38c | 20211 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
20212 | if (attr) |
20213 | { | |
e7c27a73 | 20214 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20215 | } |
63d06c5c DC |
20216 | { |
20217 | /* NOTE: carlton/2003-11-10: See comment above in the | |
20218 | DW_TAG_class_type, etc. block. */ | |
20219 | ||
e142c38c | 20220 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 20221 | && cu->language == language_cplus |
e142c38c | 20222 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 20223 | } |
c906108c | 20224 | break; |
74921315 | 20225 | case DW_TAG_imported_declaration: |
5c4e30ca | 20226 | case DW_TAG_namespace: |
f1e6e072 | 20227 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 20228 | list_to_add = &global_symbols; |
5c4e30ca | 20229 | break; |
530e8392 KB |
20230 | case DW_TAG_module: |
20231 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
20232 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
20233 | list_to_add = &global_symbols; | |
20234 | break; | |
4357ac6c | 20235 | case DW_TAG_common_block: |
f1e6e072 | 20236 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
20237 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
20238 | add_symbol_to_list (sym, cu->list_in_scope); | |
20239 | break; | |
c906108c SS |
20240 | default: |
20241 | /* Not a tag we recognize. Hopefully we aren't processing | |
20242 | trash data, but since we must specifically ignore things | |
20243 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 20244 | this point. */ |
e2e0b3e5 | 20245 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 20246 | dwarf_tag_name (die->tag)); |
c906108c SS |
20247 | break; |
20248 | } | |
df8a16a1 | 20249 | |
e37fd15a SW |
20250 | if (suppress_add) |
20251 | { | |
20252 | sym->hash_next = objfile->template_symbols; | |
20253 | objfile->template_symbols = sym; | |
20254 | list_to_add = NULL; | |
20255 | } | |
20256 | ||
20257 | if (list_to_add != NULL) | |
20258 | add_symbol_to_list (sym, list_to_add); | |
20259 | ||
df8a16a1 DJ |
20260 | /* For the benefit of old versions of GCC, check for anonymous |
20261 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 20262 | if (!cu->processing_has_namespace_info |
94af9270 | 20263 | && cu->language == language_cplus) |
a10964d1 | 20264 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
20265 | } |
20266 | return (sym); | |
20267 | } | |
20268 | ||
34eaf542 TT |
20269 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
20270 | ||
20271 | static struct symbol * | |
20272 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
20273 | { | |
20274 | return new_symbol_full (die, type, cu, NULL); | |
20275 | } | |
20276 | ||
98bfdba5 PA |
20277 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20278 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20279 | standard (v4) is not entirely clear about the meaning of using | |
20280 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20281 | wider than the data. The conclusion of a discussion on the DWARF | |
20282 | list was that this is unspecified. We choose to always zero-extend | |
20283 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20284 | |
98bfdba5 | 20285 | static gdb_byte * |
ff39bb5e | 20286 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20287 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20288 | { |
e7c27a73 | 20289 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
20290 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20291 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20292 | LONGEST l = DW_UNSND (attr); |
20293 | ||
20294 | if (bits < sizeof (*value) * 8) | |
20295 | { | |
20296 | l &= ((LONGEST) 1 << bits) - 1; | |
20297 | *value = l; | |
20298 | } | |
20299 | else if (bits == sizeof (*value) * 8) | |
20300 | *value = l; | |
20301 | else | |
20302 | { | |
224c3ddb | 20303 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20304 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20305 | return bytes; | |
20306 | } | |
20307 | ||
20308 | return NULL; | |
20309 | } | |
20310 | ||
20311 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20312 | the value does not fit in *VALUE, set *BYTES - either already | |
20313 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20314 | or, set *BATON, if we translated the constant to a location | |
20315 | expression. */ | |
20316 | ||
20317 | static void | |
ff39bb5e | 20318 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20319 | const char *name, struct obstack *obstack, |
20320 | struct dwarf2_cu *cu, | |
d521ce57 | 20321 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20322 | struct dwarf2_locexpr_baton **baton) |
20323 | { | |
20324 | struct objfile *objfile = cu->objfile; | |
20325 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 20326 | struct dwarf_block *blk; |
98bfdba5 PA |
20327 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20328 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20329 | ||
20330 | *value = 0; | |
20331 | *bytes = NULL; | |
20332 | *baton = NULL; | |
c906108c SS |
20333 | |
20334 | switch (attr->form) | |
20335 | { | |
20336 | case DW_FORM_addr: | |
3019eac3 | 20337 | case DW_FORM_GNU_addr_index: |
ac56253d | 20338 | { |
ac56253d TT |
20339 | gdb_byte *data; |
20340 | ||
98bfdba5 PA |
20341 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20342 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20343 | cu_header->addr_size, |
98bfdba5 | 20344 | TYPE_LENGTH (type)); |
ac56253d TT |
20345 | /* Symbols of this form are reasonably rare, so we just |
20346 | piggyback on the existing location code rather than writing | |
20347 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20348 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20349 | (*baton)->per_cu = cu->per_cu; |
20350 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20351 | |
98bfdba5 | 20352 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20353 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20354 | (*baton)->data = data; |
ac56253d TT |
20355 | |
20356 | data[0] = DW_OP_addr; | |
20357 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20358 | byte_order, DW_ADDR (attr)); | |
20359 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20360 | } |
c906108c | 20361 | break; |
4ac36638 | 20362 | case DW_FORM_string: |
93b5768b | 20363 | case DW_FORM_strp: |
3019eac3 | 20364 | case DW_FORM_GNU_str_index: |
36586728 | 20365 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
20366 | /* DW_STRING is already allocated on the objfile obstack, point |
20367 | directly to it. */ | |
d521ce57 | 20368 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 20369 | break; |
c906108c SS |
20370 | case DW_FORM_block1: |
20371 | case DW_FORM_block2: | |
20372 | case DW_FORM_block4: | |
20373 | case DW_FORM_block: | |
2dc7f7b3 | 20374 | case DW_FORM_exprloc: |
0224619f | 20375 | case DW_FORM_data16: |
c906108c | 20376 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
20377 | if (TYPE_LENGTH (type) != blk->size) |
20378 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
20379 | TYPE_LENGTH (type)); | |
20380 | *bytes = blk->data; | |
c906108c | 20381 | break; |
2df3850c JM |
20382 | |
20383 | /* The DW_AT_const_value attributes are supposed to carry the | |
20384 | symbol's value "represented as it would be on the target | |
20385 | architecture." By the time we get here, it's already been | |
20386 | converted to host endianness, so we just need to sign- or | |
20387 | zero-extend it as appropriate. */ | |
20388 | case DW_FORM_data1: | |
3aef2284 | 20389 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 20390 | break; |
c906108c | 20391 | case DW_FORM_data2: |
3aef2284 | 20392 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 20393 | break; |
c906108c | 20394 | case DW_FORM_data4: |
3aef2284 | 20395 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 20396 | break; |
c906108c | 20397 | case DW_FORM_data8: |
3aef2284 | 20398 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
20399 | break; |
20400 | ||
c906108c | 20401 | case DW_FORM_sdata: |
663c44ac | 20402 | case DW_FORM_implicit_const: |
98bfdba5 | 20403 | *value = DW_SND (attr); |
2df3850c JM |
20404 | break; |
20405 | ||
c906108c | 20406 | case DW_FORM_udata: |
98bfdba5 | 20407 | *value = DW_UNSND (attr); |
c906108c | 20408 | break; |
2df3850c | 20409 | |
c906108c | 20410 | default: |
4d3c2250 | 20411 | complaint (&symfile_complaints, |
e2e0b3e5 | 20412 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 20413 | dwarf_form_name (attr->form)); |
98bfdba5 | 20414 | *value = 0; |
c906108c SS |
20415 | break; |
20416 | } | |
20417 | } | |
20418 | ||
2df3850c | 20419 | |
98bfdba5 PA |
20420 | /* Copy constant value from an attribute to a symbol. */ |
20421 | ||
2df3850c | 20422 | static void |
ff39bb5e | 20423 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 20424 | struct dwarf2_cu *cu) |
2df3850c | 20425 | { |
98bfdba5 | 20426 | struct objfile *objfile = cu->objfile; |
12df843f | 20427 | LONGEST value; |
d521ce57 | 20428 | const gdb_byte *bytes; |
98bfdba5 | 20429 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 20430 | |
98bfdba5 PA |
20431 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
20432 | SYMBOL_PRINT_NAME (sym), | |
20433 | &objfile->objfile_obstack, cu, | |
20434 | &value, &bytes, &baton); | |
2df3850c | 20435 | |
98bfdba5 PA |
20436 | if (baton != NULL) |
20437 | { | |
98bfdba5 | 20438 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 20439 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
20440 | } |
20441 | else if (bytes != NULL) | |
20442 | { | |
20443 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 20444 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
20445 | } |
20446 | else | |
20447 | { | |
20448 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 20449 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 20450 | } |
2df3850c JM |
20451 | } |
20452 | ||
c906108c SS |
20453 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
20454 | ||
20455 | static struct type * | |
e7c27a73 | 20456 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20457 | { |
c906108c | 20458 | struct attribute *type_attr; |
c906108c | 20459 | |
e142c38c | 20460 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
20461 | if (!type_attr) |
20462 | { | |
20463 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 20464 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 20465 | } |
348e048f | 20466 | |
673bfd45 | 20467 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20468 | } |
20469 | ||
b4ba55a1 JB |
20470 | /* True iff CU's producer generates GNAT Ada auxiliary information |
20471 | that allows to find parallel types through that information instead | |
20472 | of having to do expensive parallel lookups by type name. */ | |
20473 | ||
20474 | static int | |
20475 | need_gnat_info (struct dwarf2_cu *cu) | |
20476 | { | |
20477 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
20478 | of GNAT produces this auxiliary information, without any indication | |
20479 | that it is produced. Part of enhancing the FSF version of GNAT | |
20480 | to produce that information will be to put in place an indicator | |
20481 | that we can use in order to determine whether the descriptive type | |
20482 | info is available or not. One suggestion that has been made is | |
20483 | to use a new attribute, attached to the CU die. For now, assume | |
20484 | that the descriptive type info is not available. */ | |
20485 | return 0; | |
20486 | } | |
20487 | ||
b4ba55a1 JB |
20488 | /* Return the auxiliary type of the die in question using its |
20489 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
20490 | attribute is not present. */ | |
20491 | ||
20492 | static struct type * | |
20493 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
20494 | { | |
b4ba55a1 | 20495 | struct attribute *type_attr; |
b4ba55a1 JB |
20496 | |
20497 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
20498 | if (!type_attr) | |
20499 | return NULL; | |
20500 | ||
673bfd45 | 20501 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
20502 | } |
20503 | ||
20504 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
20505 | descriptive type accordingly. */ | |
20506 | ||
20507 | static void | |
20508 | set_descriptive_type (struct type *type, struct die_info *die, | |
20509 | struct dwarf2_cu *cu) | |
20510 | { | |
20511 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
20512 | ||
20513 | if (descriptive_type) | |
20514 | { | |
20515 | ALLOCATE_GNAT_AUX_TYPE (type); | |
20516 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
20517 | } | |
20518 | } | |
20519 | ||
c906108c SS |
20520 | /* Return the containing type of the die in question using its |
20521 | DW_AT_containing_type attribute. */ | |
20522 | ||
20523 | static struct type * | |
e7c27a73 | 20524 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20525 | { |
c906108c | 20526 | struct attribute *type_attr; |
c906108c | 20527 | |
e142c38c | 20528 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
20529 | if (!type_attr) |
20530 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 20531 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 20532 | |
673bfd45 | 20533 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20534 | } |
20535 | ||
ac9ec31b DE |
20536 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
20537 | ||
20538 | static struct type * | |
20539 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
20540 | { | |
20541 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
20542 | char *message, *saved; | |
20543 | ||
20544 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 20545 | objfile_name (objfile), |
9c541725 PA |
20546 | to_underlying (cu->header.sect_off), |
20547 | to_underlying (die->sect_off)); | |
224c3ddb SM |
20548 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
20549 | message, strlen (message)); | |
ac9ec31b DE |
20550 | xfree (message); |
20551 | ||
19f392bc | 20552 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
20553 | } |
20554 | ||
673bfd45 | 20555 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
20556 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
20557 | DW_AT_containing_type. | |
673bfd45 DE |
20558 | If there is no type substitute an error marker. */ |
20559 | ||
c906108c | 20560 | static struct type * |
ff39bb5e | 20561 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 20562 | struct dwarf2_cu *cu) |
c906108c | 20563 | { |
bb5ed363 | 20564 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
20565 | struct type *this_type; |
20566 | ||
ac9ec31b DE |
20567 | gdb_assert (attr->name == DW_AT_type |
20568 | || attr->name == DW_AT_GNAT_descriptive_type | |
20569 | || attr->name == DW_AT_containing_type); | |
20570 | ||
673bfd45 DE |
20571 | /* First see if we have it cached. */ |
20572 | ||
36586728 TT |
20573 | if (attr->form == DW_FORM_GNU_ref_alt) |
20574 | { | |
20575 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 20576 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 20577 | |
9c541725 PA |
20578 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
20579 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 20580 | } |
7771576e | 20581 | else if (attr_form_is_ref (attr)) |
673bfd45 | 20582 | { |
9c541725 | 20583 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 20584 | |
9c541725 | 20585 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 20586 | } |
55f1336d | 20587 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 20588 | { |
ac9ec31b | 20589 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 20590 | |
ac9ec31b | 20591 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
20592 | } |
20593 | else | |
20594 | { | |
ac9ec31b DE |
20595 | complaint (&symfile_complaints, |
20596 | _("Dwarf Error: Bad type attribute %s in DIE" | |
20597 | " at 0x%x [in module %s]"), | |
9c541725 | 20598 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 20599 | objfile_name (objfile)); |
ac9ec31b | 20600 | return build_error_marker_type (cu, die); |
673bfd45 DE |
20601 | } |
20602 | ||
20603 | /* If not cached we need to read it in. */ | |
20604 | ||
20605 | if (this_type == NULL) | |
20606 | { | |
ac9ec31b | 20607 | struct die_info *type_die = NULL; |
673bfd45 DE |
20608 | struct dwarf2_cu *type_cu = cu; |
20609 | ||
7771576e | 20610 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20611 | type_die = follow_die_ref (die, attr, &type_cu); |
20612 | if (type_die == NULL) | |
20613 | return build_error_marker_type (cu, die); | |
20614 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
20615 | from an inter-CU reference and the type's CU got expanded before |
20616 | ours. */ | |
ac9ec31b | 20617 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
20618 | } |
20619 | ||
20620 | /* If we still don't have a type use an error marker. */ | |
20621 | ||
20622 | if (this_type == NULL) | |
ac9ec31b | 20623 | return build_error_marker_type (cu, die); |
673bfd45 | 20624 | |
f792889a | 20625 | return this_type; |
c906108c SS |
20626 | } |
20627 | ||
673bfd45 DE |
20628 | /* Return the type in DIE, CU. |
20629 | Returns NULL for invalid types. | |
20630 | ||
02142a6c | 20631 | This first does a lookup in die_type_hash, |
673bfd45 DE |
20632 | and only reads the die in if necessary. |
20633 | ||
20634 | NOTE: This can be called when reading in partial or full symbols. */ | |
20635 | ||
f792889a | 20636 | static struct type * |
e7c27a73 | 20637 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20638 | { |
f792889a DJ |
20639 | struct type *this_type; |
20640 | ||
20641 | this_type = get_die_type (die, cu); | |
20642 | if (this_type) | |
20643 | return this_type; | |
20644 | ||
673bfd45 DE |
20645 | return read_type_die_1 (die, cu); |
20646 | } | |
20647 | ||
20648 | /* Read the type in DIE, CU. | |
20649 | Returns NULL for invalid types. */ | |
20650 | ||
20651 | static struct type * | |
20652 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
20653 | { | |
20654 | struct type *this_type = NULL; | |
20655 | ||
c906108c SS |
20656 | switch (die->tag) |
20657 | { | |
20658 | case DW_TAG_class_type: | |
680b30c7 | 20659 | case DW_TAG_interface_type: |
c906108c SS |
20660 | case DW_TAG_structure_type: |
20661 | case DW_TAG_union_type: | |
f792889a | 20662 | this_type = read_structure_type (die, cu); |
c906108c SS |
20663 | break; |
20664 | case DW_TAG_enumeration_type: | |
f792889a | 20665 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
20666 | break; |
20667 | case DW_TAG_subprogram: | |
20668 | case DW_TAG_subroutine_type: | |
edb3359d | 20669 | case DW_TAG_inlined_subroutine: |
f792889a | 20670 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
20671 | break; |
20672 | case DW_TAG_array_type: | |
f792889a | 20673 | this_type = read_array_type (die, cu); |
c906108c | 20674 | break; |
72019c9c | 20675 | case DW_TAG_set_type: |
f792889a | 20676 | this_type = read_set_type (die, cu); |
72019c9c | 20677 | break; |
c906108c | 20678 | case DW_TAG_pointer_type: |
f792889a | 20679 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
20680 | break; |
20681 | case DW_TAG_ptr_to_member_type: | |
f792889a | 20682 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
20683 | break; |
20684 | case DW_TAG_reference_type: | |
4297a3f0 AV |
20685 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
20686 | break; | |
20687 | case DW_TAG_rvalue_reference_type: | |
20688 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
20689 | break; |
20690 | case DW_TAG_const_type: | |
f792889a | 20691 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
20692 | break; |
20693 | case DW_TAG_volatile_type: | |
f792889a | 20694 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 20695 | break; |
06d66ee9 TT |
20696 | case DW_TAG_restrict_type: |
20697 | this_type = read_tag_restrict_type (die, cu); | |
20698 | break; | |
c906108c | 20699 | case DW_TAG_string_type: |
f792889a | 20700 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
20701 | break; |
20702 | case DW_TAG_typedef: | |
f792889a | 20703 | this_type = read_typedef (die, cu); |
c906108c | 20704 | break; |
a02abb62 | 20705 | case DW_TAG_subrange_type: |
f792889a | 20706 | this_type = read_subrange_type (die, cu); |
a02abb62 | 20707 | break; |
c906108c | 20708 | case DW_TAG_base_type: |
f792889a | 20709 | this_type = read_base_type (die, cu); |
c906108c | 20710 | break; |
81a17f79 | 20711 | case DW_TAG_unspecified_type: |
f792889a | 20712 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 20713 | break; |
0114d602 DJ |
20714 | case DW_TAG_namespace: |
20715 | this_type = read_namespace_type (die, cu); | |
20716 | break; | |
f55ee35c JK |
20717 | case DW_TAG_module: |
20718 | this_type = read_module_type (die, cu); | |
20719 | break; | |
a2c2acaf MW |
20720 | case DW_TAG_atomic_type: |
20721 | this_type = read_tag_atomic_type (die, cu); | |
20722 | break; | |
c906108c | 20723 | default: |
3e43a32a MS |
20724 | complaint (&symfile_complaints, |
20725 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 20726 | dwarf_tag_name (die->tag)); |
c906108c SS |
20727 | break; |
20728 | } | |
63d06c5c | 20729 | |
f792889a | 20730 | return this_type; |
63d06c5c DC |
20731 | } |
20732 | ||
abc72ce4 DE |
20733 | /* See if we can figure out if the class lives in a namespace. We do |
20734 | this by looking for a member function; its demangled name will | |
20735 | contain namespace info, if there is any. | |
20736 | Return the computed name or NULL. | |
20737 | Space for the result is allocated on the objfile's obstack. | |
20738 | This is the full-die version of guess_partial_die_structure_name. | |
20739 | In this case we know DIE has no useful parent. */ | |
20740 | ||
20741 | static char * | |
20742 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
20743 | { | |
20744 | struct die_info *spec_die; | |
20745 | struct dwarf2_cu *spec_cu; | |
20746 | struct die_info *child; | |
20747 | ||
20748 | spec_cu = cu; | |
20749 | spec_die = die_specification (die, &spec_cu); | |
20750 | if (spec_die != NULL) | |
20751 | { | |
20752 | die = spec_die; | |
20753 | cu = spec_cu; | |
20754 | } | |
20755 | ||
20756 | for (child = die->child; | |
20757 | child != NULL; | |
20758 | child = child->sibling) | |
20759 | { | |
20760 | if (child->tag == DW_TAG_subprogram) | |
20761 | { | |
73b9be8b | 20762 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 20763 | |
7d45c7c3 | 20764 | if (linkage_name != NULL) |
abc72ce4 DE |
20765 | { |
20766 | char *actual_name | |
20767 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 20768 | linkage_name); |
abc72ce4 DE |
20769 | char *name = NULL; |
20770 | ||
20771 | if (actual_name != NULL) | |
20772 | { | |
15d034d0 | 20773 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
20774 | |
20775 | if (die_name != NULL | |
20776 | && strcmp (die_name, actual_name) != 0) | |
20777 | { | |
20778 | /* Strip off the class name from the full name. | |
20779 | We want the prefix. */ | |
20780 | int die_name_len = strlen (die_name); | |
20781 | int actual_name_len = strlen (actual_name); | |
20782 | ||
20783 | /* Test for '::' as a sanity check. */ | |
20784 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
20785 | && actual_name[actual_name_len |
20786 | - die_name_len - 1] == ':') | |
224c3ddb SM |
20787 | name = (char *) obstack_copy0 ( |
20788 | &cu->objfile->per_bfd->storage_obstack, | |
20789 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
20790 | } |
20791 | } | |
20792 | xfree (actual_name); | |
20793 | return name; | |
20794 | } | |
20795 | } | |
20796 | } | |
20797 | ||
20798 | return NULL; | |
20799 | } | |
20800 | ||
96408a79 SA |
20801 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
20802 | prefix part in such case. See | |
20803 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20804 | ||
a121b7c1 | 20805 | static const char * |
96408a79 SA |
20806 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
20807 | { | |
20808 | struct attribute *attr; | |
e6a959d6 | 20809 | const char *base; |
96408a79 SA |
20810 | |
20811 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
20812 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
20813 | return NULL; | |
20814 | ||
7d45c7c3 | 20815 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
20816 | return NULL; |
20817 | ||
73b9be8b | 20818 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
20819 | if (attr == NULL || DW_STRING (attr) == NULL) |
20820 | return NULL; | |
20821 | ||
20822 | /* dwarf2_name had to be already called. */ | |
20823 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
20824 | ||
20825 | /* Strip the base name, keep any leading namespaces/classes. */ | |
20826 | base = strrchr (DW_STRING (attr), ':'); | |
20827 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
20828 | return ""; | |
20829 | ||
224c3ddb SM |
20830 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
20831 | DW_STRING (attr), | |
20832 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
20833 | } |
20834 | ||
fdde2d81 | 20835 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 20836 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 20837 | |
0114d602 DJ |
20838 | For example, if we're within the method foo() in the following |
20839 | code: | |
20840 | ||
20841 | namespace N { | |
20842 | class C { | |
20843 | void foo () { | |
20844 | } | |
20845 | }; | |
20846 | } | |
20847 | ||
20848 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 20849 | |
0d5cff50 | 20850 | static const char * |
e142c38c | 20851 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 20852 | { |
0114d602 DJ |
20853 | struct die_info *parent, *spec_die; |
20854 | struct dwarf2_cu *spec_cu; | |
20855 | struct type *parent_type; | |
a121b7c1 | 20856 | const char *retval; |
63d06c5c | 20857 | |
9c37b5ae | 20858 | if (cu->language != language_cplus |
c44af4eb TT |
20859 | && cu->language != language_fortran && cu->language != language_d |
20860 | && cu->language != language_rust) | |
0114d602 DJ |
20861 | return ""; |
20862 | ||
96408a79 SA |
20863 | retval = anonymous_struct_prefix (die, cu); |
20864 | if (retval) | |
20865 | return retval; | |
20866 | ||
0114d602 DJ |
20867 | /* We have to be careful in the presence of DW_AT_specification. |
20868 | For example, with GCC 3.4, given the code | |
20869 | ||
20870 | namespace N { | |
20871 | void foo() { | |
20872 | // Definition of N::foo. | |
20873 | } | |
20874 | } | |
20875 | ||
20876 | then we'll have a tree of DIEs like this: | |
20877 | ||
20878 | 1: DW_TAG_compile_unit | |
20879 | 2: DW_TAG_namespace // N | |
20880 | 3: DW_TAG_subprogram // declaration of N::foo | |
20881 | 4: DW_TAG_subprogram // definition of N::foo | |
20882 | DW_AT_specification // refers to die #3 | |
20883 | ||
20884 | Thus, when processing die #4, we have to pretend that we're in | |
20885 | the context of its DW_AT_specification, namely the contex of die | |
20886 | #3. */ | |
20887 | spec_cu = cu; | |
20888 | spec_die = die_specification (die, &spec_cu); | |
20889 | if (spec_die == NULL) | |
20890 | parent = die->parent; | |
20891 | else | |
63d06c5c | 20892 | { |
0114d602 DJ |
20893 | parent = spec_die->parent; |
20894 | cu = spec_cu; | |
63d06c5c | 20895 | } |
0114d602 DJ |
20896 | |
20897 | if (parent == NULL) | |
20898 | return ""; | |
98bfdba5 PA |
20899 | else if (parent->building_fullname) |
20900 | { | |
20901 | const char *name; | |
20902 | const char *parent_name; | |
20903 | ||
20904 | /* It has been seen on RealView 2.2 built binaries, | |
20905 | DW_TAG_template_type_param types actually _defined_ as | |
20906 | children of the parent class: | |
20907 | ||
20908 | enum E {}; | |
20909 | template class <class Enum> Class{}; | |
20910 | Class<enum E> class_e; | |
20911 | ||
20912 | 1: DW_TAG_class_type (Class) | |
20913 | 2: DW_TAG_enumeration_type (E) | |
20914 | 3: DW_TAG_enumerator (enum1:0) | |
20915 | 3: DW_TAG_enumerator (enum2:1) | |
20916 | ... | |
20917 | 2: DW_TAG_template_type_param | |
20918 | DW_AT_type DW_FORM_ref_udata (E) | |
20919 | ||
20920 | Besides being broken debug info, it can put GDB into an | |
20921 | infinite loop. Consider: | |
20922 | ||
20923 | When we're building the full name for Class<E>, we'll start | |
20924 | at Class, and go look over its template type parameters, | |
20925 | finding E. We'll then try to build the full name of E, and | |
20926 | reach here. We're now trying to build the full name of E, | |
20927 | and look over the parent DIE for containing scope. In the | |
20928 | broken case, if we followed the parent DIE of E, we'd again | |
20929 | find Class, and once again go look at its template type | |
20930 | arguments, etc., etc. Simply don't consider such parent die | |
20931 | as source-level parent of this die (it can't be, the language | |
20932 | doesn't allow it), and break the loop here. */ | |
20933 | name = dwarf2_name (die, cu); | |
20934 | parent_name = dwarf2_name (parent, cu); | |
20935 | complaint (&symfile_complaints, | |
20936 | _("template param type '%s' defined within parent '%s'"), | |
20937 | name ? name : "<unknown>", | |
20938 | parent_name ? parent_name : "<unknown>"); | |
20939 | return ""; | |
20940 | } | |
63d06c5c | 20941 | else |
0114d602 DJ |
20942 | switch (parent->tag) |
20943 | { | |
63d06c5c | 20944 | case DW_TAG_namespace: |
0114d602 | 20945 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20946 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20947 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20948 | Work around this problem here. */ | |
20949 | if (cu->language == language_cplus | |
20950 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
20951 | return ""; | |
0114d602 DJ |
20952 | /* We give a name to even anonymous namespaces. */ |
20953 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 20954 | case DW_TAG_class_type: |
680b30c7 | 20955 | case DW_TAG_interface_type: |
63d06c5c | 20956 | case DW_TAG_structure_type: |
0114d602 | 20957 | case DW_TAG_union_type: |
f55ee35c | 20958 | case DW_TAG_module: |
0114d602 DJ |
20959 | parent_type = read_type_die (parent, cu); |
20960 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20961 | return TYPE_TAG_NAME (parent_type); | |
20962 | else | |
20963 | /* An anonymous structure is only allowed non-static data | |
20964 | members; no typedefs, no member functions, et cetera. | |
20965 | So it does not need a prefix. */ | |
20966 | return ""; | |
abc72ce4 | 20967 | case DW_TAG_compile_unit: |
95554aad | 20968 | case DW_TAG_partial_unit: |
abc72ce4 DE |
20969 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
20970 | if (cu->language == language_cplus | |
8b70b953 | 20971 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
20972 | && die->child != NULL |
20973 | && (die->tag == DW_TAG_class_type | |
20974 | || die->tag == DW_TAG_structure_type | |
20975 | || die->tag == DW_TAG_union_type)) | |
20976 | { | |
20977 | char *name = guess_full_die_structure_name (die, cu); | |
20978 | if (name != NULL) | |
20979 | return name; | |
20980 | } | |
20981 | return ""; | |
3d567982 TT |
20982 | case DW_TAG_enumeration_type: |
20983 | parent_type = read_type_die (parent, cu); | |
20984 | if (TYPE_DECLARED_CLASS (parent_type)) | |
20985 | { | |
20986 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20987 | return TYPE_TAG_NAME (parent_type); | |
20988 | return ""; | |
20989 | } | |
20990 | /* Fall through. */ | |
63d06c5c | 20991 | default: |
8176b9b8 | 20992 | return determine_prefix (parent, cu); |
63d06c5c | 20993 | } |
63d06c5c DC |
20994 | } |
20995 | ||
3e43a32a MS |
20996 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
20997 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
20998 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
20999 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
21000 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 21001 | |
f55ee35c | 21002 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
21003 | |
21004 | static char * | |
f55ee35c JK |
21005 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
21006 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 21007 | { |
f55ee35c | 21008 | const char *lead = ""; |
5c315b68 | 21009 | const char *sep; |
63d06c5c | 21010 | |
3e43a32a MS |
21011 | if (suffix == NULL || suffix[0] == '\0' |
21012 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 21013 | sep = ""; |
45280282 IB |
21014 | else if (cu->language == language_d) |
21015 | { | |
21016 | /* For D, the 'main' function could be defined in any module, but it | |
21017 | should never be prefixed. */ | |
21018 | if (strcmp (suffix, "D main") == 0) | |
21019 | { | |
21020 | prefix = ""; | |
21021 | sep = ""; | |
21022 | } | |
21023 | else | |
21024 | sep = "."; | |
21025 | } | |
f55ee35c JK |
21026 | else if (cu->language == language_fortran && physname) |
21027 | { | |
21028 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
21029 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
21030 | ||
21031 | lead = "__"; | |
21032 | sep = "_MOD_"; | |
21033 | } | |
987504bb JJ |
21034 | else |
21035 | sep = "::"; | |
63d06c5c | 21036 | |
6dd47d34 DE |
21037 | if (prefix == NULL) |
21038 | prefix = ""; | |
21039 | if (suffix == NULL) | |
21040 | suffix = ""; | |
21041 | ||
987504bb JJ |
21042 | if (obs == NULL) |
21043 | { | |
3e43a32a | 21044 | char *retval |
224c3ddb SM |
21045 | = ((char *) |
21046 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 21047 | |
f55ee35c JK |
21048 | strcpy (retval, lead); |
21049 | strcat (retval, prefix); | |
6dd47d34 DE |
21050 | strcat (retval, sep); |
21051 | strcat (retval, suffix); | |
63d06c5c DC |
21052 | return retval; |
21053 | } | |
987504bb JJ |
21054 | else |
21055 | { | |
21056 | /* We have an obstack. */ | |
f55ee35c | 21057 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 21058 | } |
63d06c5c DC |
21059 | } |
21060 | ||
c906108c SS |
21061 | /* Return sibling of die, NULL if no sibling. */ |
21062 | ||
f9aca02d | 21063 | static struct die_info * |
fba45db2 | 21064 | sibling_die (struct die_info *die) |
c906108c | 21065 | { |
639d11d3 | 21066 | return die->sibling; |
c906108c SS |
21067 | } |
21068 | ||
71c25dea TT |
21069 | /* Get name of a die, return NULL if not found. */ |
21070 | ||
15d034d0 TT |
21071 | static const char * |
21072 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
21073 | struct obstack *obstack) |
21074 | { | |
21075 | if (name && cu->language == language_cplus) | |
21076 | { | |
2f408ecb | 21077 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 21078 | |
2f408ecb | 21079 | if (!canon_name.empty ()) |
71c25dea | 21080 | { |
2f408ecb PA |
21081 | if (canon_name != name) |
21082 | name = (const char *) obstack_copy0 (obstack, | |
21083 | canon_name.c_str (), | |
21084 | canon_name.length ()); | |
71c25dea TT |
21085 | } |
21086 | } | |
21087 | ||
21088 | return name; | |
c906108c SS |
21089 | } |
21090 | ||
96553a0c DE |
21091 | /* Get name of a die, return NULL if not found. |
21092 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 21093 | |
15d034d0 | 21094 | static const char * |
e142c38c | 21095 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
21096 | { |
21097 | struct attribute *attr; | |
21098 | ||
e142c38c | 21099 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 21100 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 21101 | && die->tag != DW_TAG_namespace |
53832f31 TT |
21102 | && die->tag != DW_TAG_class_type |
21103 | && die->tag != DW_TAG_interface_type | |
21104 | && die->tag != DW_TAG_structure_type | |
21105 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
21106 | return NULL; |
21107 | ||
21108 | switch (die->tag) | |
21109 | { | |
21110 | case DW_TAG_compile_unit: | |
95554aad | 21111 | case DW_TAG_partial_unit: |
71c25dea TT |
21112 | /* Compilation units have a DW_AT_name that is a filename, not |
21113 | a source language identifier. */ | |
21114 | case DW_TAG_enumeration_type: | |
21115 | case DW_TAG_enumerator: | |
21116 | /* These tags always have simple identifiers already; no need | |
21117 | to canonicalize them. */ | |
21118 | return DW_STRING (attr); | |
907af001 | 21119 | |
96553a0c DE |
21120 | case DW_TAG_namespace: |
21121 | if (attr != NULL && DW_STRING (attr) != NULL) | |
21122 | return DW_STRING (attr); | |
21123 | return CP_ANONYMOUS_NAMESPACE_STR; | |
21124 | ||
907af001 UW |
21125 | case DW_TAG_class_type: |
21126 | case DW_TAG_interface_type: | |
21127 | case DW_TAG_structure_type: | |
21128 | case DW_TAG_union_type: | |
21129 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
21130 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
21131 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
21132 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 21133 | if (attr && DW_STRING (attr) |
61012eef GB |
21134 | && (startswith (DW_STRING (attr), "._") |
21135 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 21136 | return NULL; |
53832f31 TT |
21137 | |
21138 | /* GCC might emit a nameless typedef that has a linkage name. See | |
21139 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21140 | if (!attr || DW_STRING (attr) == NULL) | |
21141 | { | |
df5c6c50 | 21142 | char *demangled = NULL; |
53832f31 | 21143 | |
73b9be8b | 21144 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
21145 | if (attr == NULL || DW_STRING (attr) == NULL) |
21146 | return NULL; | |
21147 | ||
df5c6c50 JK |
21148 | /* Avoid demangling DW_STRING (attr) the second time on a second |
21149 | call for the same DIE. */ | |
21150 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 21151 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
21152 | |
21153 | if (demangled) | |
21154 | { | |
e6a959d6 | 21155 | const char *base; |
96408a79 | 21156 | |
53832f31 | 21157 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 21158 | DW_STRING (attr) |
224c3ddb SM |
21159 | = ((const char *) |
21160 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
21161 | demangled, strlen (demangled))); | |
53832f31 TT |
21162 | DW_STRING_IS_CANONICAL (attr) = 1; |
21163 | xfree (demangled); | |
96408a79 SA |
21164 | |
21165 | /* Strip any leading namespaces/classes, keep only the base name. | |
21166 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
21167 | base = strrchr (DW_STRING (attr), ':'); | |
21168 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
21169 | return &base[1]; | |
21170 | else | |
21171 | return DW_STRING (attr); | |
53832f31 TT |
21172 | } |
21173 | } | |
907af001 UW |
21174 | break; |
21175 | ||
71c25dea | 21176 | default: |
907af001 UW |
21177 | break; |
21178 | } | |
21179 | ||
21180 | if (!DW_STRING_IS_CANONICAL (attr)) | |
21181 | { | |
21182 | DW_STRING (attr) | |
21183 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 21184 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 21185 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 21186 | } |
907af001 | 21187 | return DW_STRING (attr); |
9219021c DC |
21188 | } |
21189 | ||
21190 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
21191 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
21192 | containing the return value on output. */ | |
9219021c DC |
21193 | |
21194 | static struct die_info * | |
f2f0e013 | 21195 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
21196 | { |
21197 | struct attribute *attr; | |
9219021c | 21198 | |
f2f0e013 | 21199 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
21200 | if (attr == NULL) |
21201 | return NULL; | |
21202 | ||
f2f0e013 | 21203 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
21204 | } |
21205 | ||
c906108c SS |
21206 | /* Convert a DIE tag into its string name. */ |
21207 | ||
f39c6ffd | 21208 | static const char * |
aa1ee363 | 21209 | dwarf_tag_name (unsigned tag) |
c906108c | 21210 | { |
f39c6ffd TT |
21211 | const char *name = get_DW_TAG_name (tag); |
21212 | ||
21213 | if (name == NULL) | |
21214 | return "DW_TAG_<unknown>"; | |
21215 | ||
21216 | return name; | |
c906108c SS |
21217 | } |
21218 | ||
21219 | /* Convert a DWARF attribute code into its string name. */ | |
21220 | ||
f39c6ffd | 21221 | static const char * |
aa1ee363 | 21222 | dwarf_attr_name (unsigned attr) |
c906108c | 21223 | { |
f39c6ffd TT |
21224 | const char *name; |
21225 | ||
c764a876 | 21226 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
21227 | if (attr == DW_AT_MIPS_fde) |
21228 | return "DW_AT_MIPS_fde"; | |
21229 | #else | |
21230 | if (attr == DW_AT_HP_block_index) | |
21231 | return "DW_AT_HP_block_index"; | |
c764a876 | 21232 | #endif |
f39c6ffd TT |
21233 | |
21234 | name = get_DW_AT_name (attr); | |
21235 | ||
21236 | if (name == NULL) | |
21237 | return "DW_AT_<unknown>"; | |
21238 | ||
21239 | return name; | |
c906108c SS |
21240 | } |
21241 | ||
21242 | /* Convert a DWARF value form code into its string name. */ | |
21243 | ||
f39c6ffd | 21244 | static const char * |
aa1ee363 | 21245 | dwarf_form_name (unsigned form) |
c906108c | 21246 | { |
f39c6ffd TT |
21247 | const char *name = get_DW_FORM_name (form); |
21248 | ||
21249 | if (name == NULL) | |
21250 | return "DW_FORM_<unknown>"; | |
21251 | ||
21252 | return name; | |
c906108c SS |
21253 | } |
21254 | ||
a121b7c1 | 21255 | static const char * |
fba45db2 | 21256 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
21257 | { |
21258 | if (mybool) | |
21259 | return "TRUE"; | |
21260 | else | |
21261 | return "FALSE"; | |
21262 | } | |
21263 | ||
21264 | /* Convert a DWARF type code into its string name. */ | |
21265 | ||
f39c6ffd | 21266 | static const char * |
aa1ee363 | 21267 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 21268 | { |
f39c6ffd | 21269 | const char *name = get_DW_ATE_name (enc); |
c906108c | 21270 | |
f39c6ffd TT |
21271 | if (name == NULL) |
21272 | return "DW_ATE_<unknown>"; | |
c906108c | 21273 | |
f39c6ffd | 21274 | return name; |
c906108c | 21275 | } |
c906108c | 21276 | |
f9aca02d | 21277 | static void |
d97bc12b | 21278 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21279 | { |
21280 | unsigned int i; | |
21281 | ||
d97bc12b DE |
21282 | print_spaces (indent, f); |
21283 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
21284 | dwarf_tag_name (die->tag), die->abbrev, |
21285 | to_underlying (die->sect_off)); | |
d97bc12b DE |
21286 | |
21287 | if (die->parent != NULL) | |
21288 | { | |
21289 | print_spaces (indent, f); | |
21290 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 21291 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
21292 | } |
21293 | ||
21294 | print_spaces (indent, f); | |
21295 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21296 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21297 | |
d97bc12b DE |
21298 | print_spaces (indent, f); |
21299 | fprintf_unfiltered (f, " attributes:\n"); | |
21300 | ||
c906108c SS |
21301 | for (i = 0; i < die->num_attrs; ++i) |
21302 | { | |
d97bc12b DE |
21303 | print_spaces (indent, f); |
21304 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21305 | dwarf_attr_name (die->attrs[i].name), |
21306 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21307 | |
c906108c SS |
21308 | switch (die->attrs[i].form) |
21309 | { | |
c906108c | 21310 | case DW_FORM_addr: |
3019eac3 | 21311 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21312 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21313 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21314 | break; |
21315 | case DW_FORM_block2: | |
21316 | case DW_FORM_block4: | |
21317 | case DW_FORM_block: | |
21318 | case DW_FORM_block1: | |
56eb65bd SP |
21319 | fprintf_unfiltered (f, "block: size %s", |
21320 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21321 | break; |
2dc7f7b3 | 21322 | case DW_FORM_exprloc: |
56eb65bd SP |
21323 | fprintf_unfiltered (f, "expression: size %s", |
21324 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21325 | break; |
0224619f JK |
21326 | case DW_FORM_data16: |
21327 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21328 | break; | |
4568ecf9 DE |
21329 | case DW_FORM_ref_addr: |
21330 | fprintf_unfiltered (f, "ref address: "); | |
21331 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21332 | break; | |
36586728 TT |
21333 | case DW_FORM_GNU_ref_alt: |
21334 | fprintf_unfiltered (f, "alt ref address: "); | |
21335 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21336 | break; | |
10b3939b DJ |
21337 | case DW_FORM_ref1: |
21338 | case DW_FORM_ref2: | |
21339 | case DW_FORM_ref4: | |
4568ecf9 DE |
21340 | case DW_FORM_ref8: |
21341 | case DW_FORM_ref_udata: | |
d97bc12b | 21342 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21343 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21344 | break; |
c906108c SS |
21345 | case DW_FORM_data1: |
21346 | case DW_FORM_data2: | |
21347 | case DW_FORM_data4: | |
ce5d95e1 | 21348 | case DW_FORM_data8: |
c906108c SS |
21349 | case DW_FORM_udata: |
21350 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21351 | fprintf_unfiltered (f, "constant: %s", |
21352 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21353 | break; |
2dc7f7b3 TT |
21354 | case DW_FORM_sec_offset: |
21355 | fprintf_unfiltered (f, "section offset: %s", | |
21356 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21357 | break; | |
55f1336d | 21358 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21359 | fprintf_unfiltered (f, "signature: %s", |
21360 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21361 | break; |
c906108c | 21362 | case DW_FORM_string: |
4bdf3d34 | 21363 | case DW_FORM_strp: |
43988095 | 21364 | case DW_FORM_line_strp: |
3019eac3 | 21365 | case DW_FORM_GNU_str_index: |
36586728 | 21366 | case DW_FORM_GNU_strp_alt: |
8285870a | 21367 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 21368 | DW_STRING (&die->attrs[i]) |
8285870a JK |
21369 | ? DW_STRING (&die->attrs[i]) : "", |
21370 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
21371 | break; |
21372 | case DW_FORM_flag: | |
21373 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 21374 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 21375 | else |
d97bc12b | 21376 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 21377 | break; |
2dc7f7b3 TT |
21378 | case DW_FORM_flag_present: |
21379 | fprintf_unfiltered (f, "flag: TRUE"); | |
21380 | break; | |
a8329558 | 21381 | case DW_FORM_indirect: |
0963b4bd MS |
21382 | /* The reader will have reduced the indirect form to |
21383 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
21384 | fprintf_unfiltered (f, |
21385 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 21386 | break; |
663c44ac JK |
21387 | case DW_FORM_implicit_const: |
21388 | fprintf_unfiltered (f, "constant: %s", | |
21389 | plongest (DW_SND (&die->attrs[i]))); | |
21390 | break; | |
c906108c | 21391 | default: |
d97bc12b | 21392 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 21393 | die->attrs[i].form); |
d97bc12b | 21394 | break; |
c906108c | 21395 | } |
d97bc12b | 21396 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
21397 | } |
21398 | } | |
21399 | ||
f9aca02d | 21400 | static void |
d97bc12b | 21401 | dump_die_for_error (struct die_info *die) |
c906108c | 21402 | { |
d97bc12b DE |
21403 | dump_die_shallow (gdb_stderr, 0, die); |
21404 | } | |
21405 | ||
21406 | static void | |
21407 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
21408 | { | |
21409 | int indent = level * 4; | |
21410 | ||
21411 | gdb_assert (die != NULL); | |
21412 | ||
21413 | if (level >= max_level) | |
21414 | return; | |
21415 | ||
21416 | dump_die_shallow (f, indent, die); | |
21417 | ||
21418 | if (die->child != NULL) | |
c906108c | 21419 | { |
d97bc12b DE |
21420 | print_spaces (indent, f); |
21421 | fprintf_unfiltered (f, " Children:"); | |
21422 | if (level + 1 < max_level) | |
21423 | { | |
21424 | fprintf_unfiltered (f, "\n"); | |
21425 | dump_die_1 (f, level + 1, max_level, die->child); | |
21426 | } | |
21427 | else | |
21428 | { | |
3e43a32a MS |
21429 | fprintf_unfiltered (f, |
21430 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
21431 | } |
21432 | } | |
21433 | ||
21434 | if (die->sibling != NULL && level > 0) | |
21435 | { | |
21436 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
21437 | } |
21438 | } | |
21439 | ||
d97bc12b DE |
21440 | /* This is called from the pdie macro in gdbinit.in. |
21441 | It's not static so gcc will keep a copy callable from gdb. */ | |
21442 | ||
21443 | void | |
21444 | dump_die (struct die_info *die, int max_level) | |
21445 | { | |
21446 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
21447 | } | |
21448 | ||
f9aca02d | 21449 | static void |
51545339 | 21450 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21451 | { |
51545339 | 21452 | void **slot; |
c906108c | 21453 | |
9c541725 PA |
21454 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
21455 | to_underlying (die->sect_off), | |
b64f50a1 | 21456 | INSERT); |
51545339 DJ |
21457 | |
21458 | *slot = die; | |
c906108c SS |
21459 | } |
21460 | ||
b64f50a1 JK |
21461 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
21462 | required kind. */ | |
21463 | ||
21464 | static sect_offset | |
ff39bb5e | 21465 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 21466 | { |
7771576e | 21467 | if (attr_form_is_ref (attr)) |
9c541725 | 21468 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
21469 | |
21470 | complaint (&symfile_complaints, | |
21471 | _("unsupported die ref attribute form: '%s'"), | |
21472 | dwarf_form_name (attr->form)); | |
9c541725 | 21473 | return {}; |
c906108c SS |
21474 | } |
21475 | ||
43bbcdc2 PH |
21476 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
21477 | * the value held by the attribute is not constant. */ | |
a02abb62 | 21478 | |
43bbcdc2 | 21479 | static LONGEST |
ff39bb5e | 21480 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 21481 | { |
663c44ac | 21482 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
21483 | return DW_SND (attr); |
21484 | else if (attr->form == DW_FORM_udata | |
21485 | || attr->form == DW_FORM_data1 | |
21486 | || attr->form == DW_FORM_data2 | |
21487 | || attr->form == DW_FORM_data4 | |
21488 | || attr->form == DW_FORM_data8) | |
21489 | return DW_UNSND (attr); | |
21490 | else | |
21491 | { | |
0224619f | 21492 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
21493 | complaint (&symfile_complaints, |
21494 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
21495 | dwarf_form_name (attr->form)); |
21496 | return default_value; | |
21497 | } | |
21498 | } | |
21499 | ||
348e048f DE |
21500 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
21501 | On entry *REF_CU is the CU of SRC_DIE. | |
21502 | On exit *REF_CU is the CU of the result. */ | |
21503 | ||
21504 | static struct die_info * | |
ff39bb5e | 21505 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
21506 | struct dwarf2_cu **ref_cu) |
21507 | { | |
21508 | struct die_info *die; | |
21509 | ||
7771576e | 21510 | if (attr_form_is_ref (attr)) |
348e048f | 21511 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 21512 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
21513 | die = follow_die_sig (src_die, attr, ref_cu); |
21514 | else | |
21515 | { | |
21516 | dump_die_for_error (src_die); | |
21517 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 21518 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
21519 | } |
21520 | ||
21521 | return die; | |
03dd20cc DJ |
21522 | } |
21523 | ||
5c631832 | 21524 | /* Follow reference OFFSET. |
673bfd45 DE |
21525 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
21526 | On exit *REF_CU is the CU of the result. | |
21527 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 21528 | |
f9aca02d | 21529 | static struct die_info * |
9c541725 | 21530 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 21531 | struct dwarf2_cu **ref_cu) |
c906108c | 21532 | { |
10b3939b | 21533 | struct die_info temp_die; |
f2f0e013 | 21534 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 21535 | |
348e048f DE |
21536 | gdb_assert (cu->per_cu != NULL); |
21537 | ||
98bfdba5 PA |
21538 | target_cu = cu; |
21539 | ||
3019eac3 | 21540 | if (cu->per_cu->is_debug_types) |
348e048f DE |
21541 | { |
21542 | /* .debug_types CUs cannot reference anything outside their CU. | |
21543 | If they need to, they have to reference a signatured type via | |
55f1336d | 21544 | DW_FORM_ref_sig8. */ |
9c541725 | 21545 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 21546 | return NULL; |
348e048f | 21547 | } |
36586728 | 21548 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 21549 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
21550 | { |
21551 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 21552 | |
9c541725 | 21553 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 21554 | cu->objfile); |
03dd20cc DJ |
21555 | |
21556 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
21557 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
21558 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 21559 | |
10b3939b DJ |
21560 | target_cu = per_cu->cu; |
21561 | } | |
98bfdba5 PA |
21562 | else if (cu->dies == NULL) |
21563 | { | |
21564 | /* We're loading full DIEs during partial symbol reading. */ | |
21565 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 21566 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 21567 | } |
c906108c | 21568 | |
f2f0e013 | 21569 | *ref_cu = target_cu; |
9c541725 | 21570 | temp_die.sect_off = sect_off; |
9a3c8263 | 21571 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
21572 | &temp_die, |
21573 | to_underlying (sect_off)); | |
5c631832 | 21574 | } |
10b3939b | 21575 | |
5c631832 JK |
21576 | /* Follow reference attribute ATTR of SRC_DIE. |
21577 | On entry *REF_CU is the CU of SRC_DIE. | |
21578 | On exit *REF_CU is the CU of the result. */ | |
21579 | ||
21580 | static struct die_info * | |
ff39bb5e | 21581 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
21582 | struct dwarf2_cu **ref_cu) |
21583 | { | |
9c541725 | 21584 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
21585 | struct dwarf2_cu *cu = *ref_cu; |
21586 | struct die_info *die; | |
21587 | ||
9c541725 | 21588 | die = follow_die_offset (sect_off, |
36586728 TT |
21589 | (attr->form == DW_FORM_GNU_ref_alt |
21590 | || cu->per_cu->is_dwz), | |
21591 | ref_cu); | |
5c631832 JK |
21592 | if (!die) |
21593 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
21594 | "at 0x%x [in module %s]"), | |
9c541725 | 21595 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 21596 | objfile_name (cu->objfile)); |
348e048f | 21597 | |
5c631832 JK |
21598 | return die; |
21599 | } | |
21600 | ||
9c541725 | 21601 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
21602 | Returned value is intended for DW_OP_call*. Returned |
21603 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
21604 | |
21605 | struct dwarf2_locexpr_baton | |
9c541725 | 21606 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
21607 | struct dwarf2_per_cu_data *per_cu, |
21608 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21609 | void *baton) | |
5c631832 | 21610 | { |
918dd910 | 21611 | struct dwarf2_cu *cu; |
5c631832 JK |
21612 | struct die_info *die; |
21613 | struct attribute *attr; | |
21614 | struct dwarf2_locexpr_baton retval; | |
21615 | ||
8cf6f0b1 TT |
21616 | dw2_setup (per_cu->objfile); |
21617 | ||
918dd910 JK |
21618 | if (per_cu->cu == NULL) |
21619 | load_cu (per_cu); | |
21620 | cu = per_cu->cu; | |
cc12ce38 DE |
21621 | if (cu == NULL) |
21622 | { | |
21623 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21624 | Instead just throw an error, not much else we can do. */ | |
21625 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21626 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21627 | } |
918dd910 | 21628 | |
9c541725 | 21629 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
21630 | if (!die) |
21631 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21632 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21633 | |
21634 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21635 | if (!attr) | |
21636 | { | |
e103e986 JK |
21637 | /* DWARF: "If there is no such attribute, then there is no effect.". |
21638 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 21639 | |
e103e986 | 21640 | retval.data = NULL; |
5c631832 JK |
21641 | retval.size = 0; |
21642 | } | |
8cf6f0b1 TT |
21643 | else if (attr_form_is_section_offset (attr)) |
21644 | { | |
21645 | struct dwarf2_loclist_baton loclist_baton; | |
21646 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
21647 | size_t size; | |
21648 | ||
21649 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
21650 | ||
21651 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
21652 | &size, pc); | |
21653 | retval.size = size; | |
21654 | } | |
5c631832 JK |
21655 | else |
21656 | { | |
21657 | if (!attr_form_is_block (attr)) | |
21658 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
21659 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 21660 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21661 | |
21662 | retval.data = DW_BLOCK (attr)->data; | |
21663 | retval.size = DW_BLOCK (attr)->size; | |
21664 | } | |
21665 | retval.per_cu = cu->per_cu; | |
918dd910 | 21666 | |
918dd910 JK |
21667 | age_cached_comp_units (); |
21668 | ||
5c631832 | 21669 | return retval; |
348e048f DE |
21670 | } |
21671 | ||
8b9737bf TT |
21672 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
21673 | offset. */ | |
21674 | ||
21675 | struct dwarf2_locexpr_baton | |
21676 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
21677 | struct dwarf2_per_cu_data *per_cu, | |
21678 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21679 | void *baton) | |
21680 | { | |
9c541725 | 21681 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 21682 | |
9c541725 | 21683 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
21684 | } |
21685 | ||
b6807d98 TT |
21686 | /* Write a constant of a given type as target-ordered bytes into |
21687 | OBSTACK. */ | |
21688 | ||
21689 | static const gdb_byte * | |
21690 | write_constant_as_bytes (struct obstack *obstack, | |
21691 | enum bfd_endian byte_order, | |
21692 | struct type *type, | |
21693 | ULONGEST value, | |
21694 | LONGEST *len) | |
21695 | { | |
21696 | gdb_byte *result; | |
21697 | ||
21698 | *len = TYPE_LENGTH (type); | |
224c3ddb | 21699 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21700 | store_unsigned_integer (result, *len, byte_order, value); |
21701 | ||
21702 | return result; | |
21703 | } | |
21704 | ||
21705 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
21706 | pointer to the constant bytes and set LEN to the length of the | |
21707 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
21708 | does not have a DW_AT_const_value, return NULL. */ | |
21709 | ||
21710 | const gdb_byte * | |
9c541725 | 21711 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
21712 | struct dwarf2_per_cu_data *per_cu, |
21713 | struct obstack *obstack, | |
21714 | LONGEST *len) | |
21715 | { | |
21716 | struct dwarf2_cu *cu; | |
21717 | struct die_info *die; | |
21718 | struct attribute *attr; | |
21719 | const gdb_byte *result = NULL; | |
21720 | struct type *type; | |
21721 | LONGEST value; | |
21722 | enum bfd_endian byte_order; | |
21723 | ||
21724 | dw2_setup (per_cu->objfile); | |
21725 | ||
21726 | if (per_cu->cu == NULL) | |
21727 | load_cu (per_cu); | |
21728 | cu = per_cu->cu; | |
cc12ce38 DE |
21729 | if (cu == NULL) |
21730 | { | |
21731 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21732 | Instead just throw an error, not much else we can do. */ | |
21733 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21734 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21735 | } |
b6807d98 | 21736 | |
9c541725 | 21737 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
21738 | if (!die) |
21739 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21740 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
21741 | |
21742 | ||
21743 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21744 | if (attr == NULL) | |
21745 | return NULL; | |
21746 | ||
21747 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
21748 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21749 | ||
21750 | switch (attr->form) | |
21751 | { | |
21752 | case DW_FORM_addr: | |
21753 | case DW_FORM_GNU_addr_index: | |
21754 | { | |
21755 | gdb_byte *tem; | |
21756 | ||
21757 | *len = cu->header.addr_size; | |
224c3ddb | 21758 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21759 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
21760 | result = tem; | |
21761 | } | |
21762 | break; | |
21763 | case DW_FORM_string: | |
21764 | case DW_FORM_strp: | |
21765 | case DW_FORM_GNU_str_index: | |
21766 | case DW_FORM_GNU_strp_alt: | |
21767 | /* DW_STRING is already allocated on the objfile obstack, point | |
21768 | directly to it. */ | |
21769 | result = (const gdb_byte *) DW_STRING (attr); | |
21770 | *len = strlen (DW_STRING (attr)); | |
21771 | break; | |
21772 | case DW_FORM_block1: | |
21773 | case DW_FORM_block2: | |
21774 | case DW_FORM_block4: | |
21775 | case DW_FORM_block: | |
21776 | case DW_FORM_exprloc: | |
0224619f | 21777 | case DW_FORM_data16: |
b6807d98 TT |
21778 | result = DW_BLOCK (attr)->data; |
21779 | *len = DW_BLOCK (attr)->size; | |
21780 | break; | |
21781 | ||
21782 | /* The DW_AT_const_value attributes are supposed to carry the | |
21783 | symbol's value "represented as it would be on the target | |
21784 | architecture." By the time we get here, it's already been | |
21785 | converted to host endianness, so we just need to sign- or | |
21786 | zero-extend it as appropriate. */ | |
21787 | case DW_FORM_data1: | |
21788 | type = die_type (die, cu); | |
21789 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
21790 | if (result == NULL) | |
21791 | result = write_constant_as_bytes (obstack, byte_order, | |
21792 | type, value, len); | |
21793 | break; | |
21794 | case DW_FORM_data2: | |
21795 | type = die_type (die, cu); | |
21796 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
21797 | if (result == NULL) | |
21798 | result = write_constant_as_bytes (obstack, byte_order, | |
21799 | type, value, len); | |
21800 | break; | |
21801 | case DW_FORM_data4: | |
21802 | type = die_type (die, cu); | |
21803 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
21804 | if (result == NULL) | |
21805 | result = write_constant_as_bytes (obstack, byte_order, | |
21806 | type, value, len); | |
21807 | break; | |
21808 | case DW_FORM_data8: | |
21809 | type = die_type (die, cu); | |
21810 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
21811 | if (result == NULL) | |
21812 | result = write_constant_as_bytes (obstack, byte_order, | |
21813 | type, value, len); | |
21814 | break; | |
21815 | ||
21816 | case DW_FORM_sdata: | |
663c44ac | 21817 | case DW_FORM_implicit_const: |
b6807d98 TT |
21818 | type = die_type (die, cu); |
21819 | result = write_constant_as_bytes (obstack, byte_order, | |
21820 | type, DW_SND (attr), len); | |
21821 | break; | |
21822 | ||
21823 | case DW_FORM_udata: | |
21824 | type = die_type (die, cu); | |
21825 | result = write_constant_as_bytes (obstack, byte_order, | |
21826 | type, DW_UNSND (attr), len); | |
21827 | break; | |
21828 | ||
21829 | default: | |
21830 | complaint (&symfile_complaints, | |
21831 | _("unsupported const value attribute form: '%s'"), | |
21832 | dwarf_form_name (attr->form)); | |
21833 | break; | |
21834 | } | |
21835 | ||
21836 | return result; | |
21837 | } | |
21838 | ||
7942e96e AA |
21839 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
21840 | valid type for this die is found. */ | |
21841 | ||
21842 | struct type * | |
9c541725 | 21843 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
21844 | struct dwarf2_per_cu_data *per_cu) |
21845 | { | |
21846 | struct dwarf2_cu *cu; | |
21847 | struct die_info *die; | |
21848 | ||
21849 | dw2_setup (per_cu->objfile); | |
21850 | ||
21851 | if (per_cu->cu == NULL) | |
21852 | load_cu (per_cu); | |
21853 | cu = per_cu->cu; | |
21854 | if (!cu) | |
21855 | return NULL; | |
21856 | ||
9c541725 | 21857 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
21858 | if (!die) |
21859 | return NULL; | |
21860 | ||
21861 | return die_type (die, cu); | |
21862 | } | |
21863 | ||
8a9b8146 TT |
21864 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
21865 | PER_CU. */ | |
21866 | ||
21867 | struct type * | |
b64f50a1 | 21868 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
21869 | struct dwarf2_per_cu_data *per_cu) |
21870 | { | |
8a9b8146 | 21871 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21872 | |
9c541725 | 21873 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21874 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21875 | } |
21876 | ||
ac9ec31b | 21877 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21878 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21879 | On exit *REF_CU is the CU of the result. |
21880 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21881 | |
21882 | static struct die_info * | |
ac9ec31b DE |
21883 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21884 | struct dwarf2_cu **ref_cu) | |
348e048f | 21885 | { |
348e048f | 21886 | struct die_info temp_die; |
348e048f DE |
21887 | struct dwarf2_cu *sig_cu; |
21888 | struct die_info *die; | |
21889 | ||
ac9ec31b DE |
21890 | /* While it might be nice to assert sig_type->type == NULL here, |
21891 | we can get here for DW_AT_imported_declaration where we need | |
21892 | the DIE not the type. */ | |
348e048f DE |
21893 | |
21894 | /* If necessary, add it to the queue and load its DIEs. */ | |
21895 | ||
95554aad | 21896 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21897 | read_signatured_type (sig_type); |
348e048f | 21898 | |
348e048f | 21899 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21900 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21901 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21902 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21903 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21904 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21905 | if (die) |
21906 | { | |
796a7ff8 DE |
21907 | /* For .gdb_index version 7 keep track of included TUs. |
21908 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21909 | if (dwarf2_per_objfile->index_table != NULL | |
21910 | && dwarf2_per_objfile->index_table->version <= 7) | |
21911 | { | |
21912 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21913 | (*ref_cu)->per_cu->imported_symtabs, | |
21914 | sig_cu->per_cu); | |
21915 | } | |
21916 | ||
348e048f DE |
21917 | *ref_cu = sig_cu; |
21918 | return die; | |
21919 | } | |
21920 | ||
ac9ec31b DE |
21921 | return NULL; |
21922 | } | |
21923 | ||
21924 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21925 | On entry *REF_CU is the CU of SRC_DIE. | |
21926 | On exit *REF_CU is the CU of the result. | |
21927 | The result is the DIE of the type. | |
21928 | If the referenced type cannot be found an error is thrown. */ | |
21929 | ||
21930 | static struct die_info * | |
ff39bb5e | 21931 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21932 | struct dwarf2_cu **ref_cu) |
21933 | { | |
21934 | ULONGEST signature = DW_SIGNATURE (attr); | |
21935 | struct signatured_type *sig_type; | |
21936 | struct die_info *die; | |
21937 | ||
21938 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21939 | ||
a2ce51a0 | 21940 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21941 | /* sig_type will be NULL if the signatured type is missing from |
21942 | the debug info. */ | |
21943 | if (sig_type == NULL) | |
21944 | { | |
21945 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21946 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21947 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21948 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21949 | } |
21950 | ||
21951 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
21952 | if (die == NULL) | |
21953 | { | |
21954 | dump_die_for_error (src_die); | |
21955 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21956 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21957 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21958 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21959 | } |
21960 | ||
21961 | return die; | |
21962 | } | |
21963 | ||
21964 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
21965 | reading in and processing the type unit if necessary. */ | |
21966 | ||
21967 | static struct type * | |
21968 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
21969 | struct dwarf2_cu *cu) | |
21970 | { | |
21971 | struct signatured_type *sig_type; | |
21972 | struct dwarf2_cu *type_cu; | |
21973 | struct die_info *type_die; | |
21974 | struct type *type; | |
21975 | ||
a2ce51a0 | 21976 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
21977 | /* sig_type will be NULL if the signatured type is missing from |
21978 | the debug info. */ | |
21979 | if (sig_type == NULL) | |
21980 | { | |
21981 | complaint (&symfile_complaints, | |
21982 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21983 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21984 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21985 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21986 | return build_error_marker_type (cu, die); |
21987 | } | |
21988 | ||
21989 | /* If we already know the type we're done. */ | |
21990 | if (sig_type->type != NULL) | |
21991 | return sig_type->type; | |
21992 | ||
21993 | type_cu = cu; | |
21994 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
21995 | if (type_die != NULL) | |
21996 | { | |
21997 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
21998 | is created. This is important, for example, because for c++ classes | |
21999 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
22000 | type = read_type_die (type_die, type_cu); | |
22001 | if (type == NULL) | |
22002 | { | |
22003 | complaint (&symfile_complaints, | |
22004 | _("Dwarf Error: Cannot build signatured type %s" | |
22005 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 22006 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22007 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22008 | type = build_error_marker_type (cu, die); |
22009 | } | |
22010 | } | |
22011 | else | |
22012 | { | |
22013 | complaint (&symfile_complaints, | |
22014 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
22015 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 22016 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22017 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22018 | type = build_error_marker_type (cu, die); |
22019 | } | |
22020 | sig_type->type = type; | |
22021 | ||
22022 | return type; | |
22023 | } | |
22024 | ||
22025 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
22026 | reading in and processing the type unit if necessary. */ | |
22027 | ||
22028 | static struct type * | |
ff39bb5e | 22029 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 22030 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
22031 | { |
22032 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 22033 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
22034 | { |
22035 | struct dwarf2_cu *type_cu = cu; | |
22036 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
22037 | ||
22038 | return read_type_die (type_die, type_cu); | |
22039 | } | |
22040 | else if (attr->form == DW_FORM_ref_sig8) | |
22041 | { | |
22042 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
22043 | } | |
22044 | else | |
22045 | { | |
22046 | complaint (&symfile_complaints, | |
22047 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
22048 | " at 0x%x [in module %s]"), | |
9c541725 | 22049 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 22050 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22051 | return build_error_marker_type (cu, die); |
22052 | } | |
348e048f DE |
22053 | } |
22054 | ||
e5fe5e75 | 22055 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
22056 | |
22057 | static void | |
e5fe5e75 | 22058 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 22059 | { |
52dc124a | 22060 | struct signatured_type *sig_type; |
348e048f | 22061 | |
f4dc4d17 DE |
22062 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
22063 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
22064 | ||
6721b2ec DE |
22065 | /* We have the per_cu, but we need the signatured_type. |
22066 | Fortunately this is an easy translation. */ | |
22067 | gdb_assert (per_cu->is_debug_types); | |
22068 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 22069 | |
6721b2ec | 22070 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22071 | |
52dc124a | 22072 | read_signatured_type (sig_type); |
348e048f | 22073 | |
6721b2ec | 22074 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
22075 | } |
22076 | ||
dee91e82 DE |
22077 | /* die_reader_func for read_signatured_type. |
22078 | This is identical to load_full_comp_unit_reader, | |
22079 | but is kept separate for now. */ | |
348e048f DE |
22080 | |
22081 | static void | |
dee91e82 | 22082 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 22083 | const gdb_byte *info_ptr, |
dee91e82 DE |
22084 | struct die_info *comp_unit_die, |
22085 | int has_children, | |
22086 | void *data) | |
348e048f | 22087 | { |
dee91e82 | 22088 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 22089 | |
dee91e82 DE |
22090 | gdb_assert (cu->die_hash == NULL); |
22091 | cu->die_hash = | |
22092 | htab_create_alloc_ex (cu->header.length / 12, | |
22093 | die_hash, | |
22094 | die_eq, | |
22095 | NULL, | |
22096 | &cu->comp_unit_obstack, | |
22097 | hashtab_obstack_allocate, | |
22098 | dummy_obstack_deallocate); | |
348e048f | 22099 | |
dee91e82 DE |
22100 | if (has_children) |
22101 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
22102 | &info_ptr, comp_unit_die); | |
22103 | cu->dies = comp_unit_die; | |
22104 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
22105 | |
22106 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 22107 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 22108 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
22109 | or we won't be able to build types correctly. |
22110 | Similarly, if we do not read the producer, we can not apply | |
22111 | producer-specific interpretation. */ | |
95554aad | 22112 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 22113 | } |
348e048f | 22114 | |
3019eac3 DE |
22115 | /* Read in a signatured type and build its CU and DIEs. |
22116 | If the type is a stub for the real type in a DWO file, | |
22117 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
22118 | |
22119 | static void | |
22120 | read_signatured_type (struct signatured_type *sig_type) | |
22121 | { | |
22122 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 22123 | |
3019eac3 | 22124 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 22125 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22126 | |
f4dc4d17 DE |
22127 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
22128 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 22129 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
22130 | } |
22131 | ||
c906108c SS |
22132 | /* Decode simple location descriptions. |
22133 | Given a pointer to a dwarf block that defines a location, compute | |
22134 | the location and return the value. | |
22135 | ||
4cecd739 DJ |
22136 | NOTE drow/2003-11-18: This function is called in two situations |
22137 | now: for the address of static or global variables (partial symbols | |
22138 | only) and for offsets into structures which are expected to be | |
22139 | (more or less) constant. The partial symbol case should go away, | |
22140 | and only the constant case should remain. That will let this | |
22141 | function complain more accurately. A few special modes are allowed | |
22142 | without complaint for global variables (for instance, global | |
22143 | register values and thread-local values). | |
c906108c SS |
22144 | |
22145 | A location description containing no operations indicates that the | |
4cecd739 | 22146 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
22147 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
22148 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
22149 | complaint. |
22150 | ||
22151 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
22152 | |
22153 | static CORE_ADDR | |
e7c27a73 | 22154 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 22155 | { |
e7c27a73 | 22156 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
22157 | size_t i; |
22158 | size_t size = blk->size; | |
d521ce57 | 22159 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
22160 | CORE_ADDR stack[64]; |
22161 | int stacki; | |
22162 | unsigned int bytes_read, unsnd; | |
22163 | gdb_byte op; | |
c906108c | 22164 | |
21ae7a4d JK |
22165 | i = 0; |
22166 | stacki = 0; | |
22167 | stack[stacki] = 0; | |
22168 | stack[++stacki] = 0; | |
22169 | ||
22170 | while (i < size) | |
22171 | { | |
22172 | op = data[i++]; | |
22173 | switch (op) | |
22174 | { | |
22175 | case DW_OP_lit0: | |
22176 | case DW_OP_lit1: | |
22177 | case DW_OP_lit2: | |
22178 | case DW_OP_lit3: | |
22179 | case DW_OP_lit4: | |
22180 | case DW_OP_lit5: | |
22181 | case DW_OP_lit6: | |
22182 | case DW_OP_lit7: | |
22183 | case DW_OP_lit8: | |
22184 | case DW_OP_lit9: | |
22185 | case DW_OP_lit10: | |
22186 | case DW_OP_lit11: | |
22187 | case DW_OP_lit12: | |
22188 | case DW_OP_lit13: | |
22189 | case DW_OP_lit14: | |
22190 | case DW_OP_lit15: | |
22191 | case DW_OP_lit16: | |
22192 | case DW_OP_lit17: | |
22193 | case DW_OP_lit18: | |
22194 | case DW_OP_lit19: | |
22195 | case DW_OP_lit20: | |
22196 | case DW_OP_lit21: | |
22197 | case DW_OP_lit22: | |
22198 | case DW_OP_lit23: | |
22199 | case DW_OP_lit24: | |
22200 | case DW_OP_lit25: | |
22201 | case DW_OP_lit26: | |
22202 | case DW_OP_lit27: | |
22203 | case DW_OP_lit28: | |
22204 | case DW_OP_lit29: | |
22205 | case DW_OP_lit30: | |
22206 | case DW_OP_lit31: | |
22207 | stack[++stacki] = op - DW_OP_lit0; | |
22208 | break; | |
f1bea926 | 22209 | |
21ae7a4d JK |
22210 | case DW_OP_reg0: |
22211 | case DW_OP_reg1: | |
22212 | case DW_OP_reg2: | |
22213 | case DW_OP_reg3: | |
22214 | case DW_OP_reg4: | |
22215 | case DW_OP_reg5: | |
22216 | case DW_OP_reg6: | |
22217 | case DW_OP_reg7: | |
22218 | case DW_OP_reg8: | |
22219 | case DW_OP_reg9: | |
22220 | case DW_OP_reg10: | |
22221 | case DW_OP_reg11: | |
22222 | case DW_OP_reg12: | |
22223 | case DW_OP_reg13: | |
22224 | case DW_OP_reg14: | |
22225 | case DW_OP_reg15: | |
22226 | case DW_OP_reg16: | |
22227 | case DW_OP_reg17: | |
22228 | case DW_OP_reg18: | |
22229 | case DW_OP_reg19: | |
22230 | case DW_OP_reg20: | |
22231 | case DW_OP_reg21: | |
22232 | case DW_OP_reg22: | |
22233 | case DW_OP_reg23: | |
22234 | case DW_OP_reg24: | |
22235 | case DW_OP_reg25: | |
22236 | case DW_OP_reg26: | |
22237 | case DW_OP_reg27: | |
22238 | case DW_OP_reg28: | |
22239 | case DW_OP_reg29: | |
22240 | case DW_OP_reg30: | |
22241 | case DW_OP_reg31: | |
22242 | stack[++stacki] = op - DW_OP_reg0; | |
22243 | if (i < size) | |
22244 | dwarf2_complex_location_expr_complaint (); | |
22245 | break; | |
c906108c | 22246 | |
21ae7a4d JK |
22247 | case DW_OP_regx: |
22248 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
22249 | i += bytes_read; | |
22250 | stack[++stacki] = unsnd; | |
22251 | if (i < size) | |
22252 | dwarf2_complex_location_expr_complaint (); | |
22253 | break; | |
c906108c | 22254 | |
21ae7a4d JK |
22255 | case DW_OP_addr: |
22256 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
22257 | cu, &bytes_read); | |
22258 | i += bytes_read; | |
22259 | break; | |
d53d4ac5 | 22260 | |
21ae7a4d JK |
22261 | case DW_OP_const1u: |
22262 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
22263 | i += 1; | |
22264 | break; | |
22265 | ||
22266 | case DW_OP_const1s: | |
22267 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
22268 | i += 1; | |
22269 | break; | |
22270 | ||
22271 | case DW_OP_const2u: | |
22272 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
22273 | i += 2; | |
22274 | break; | |
22275 | ||
22276 | case DW_OP_const2s: | |
22277 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22278 | i += 2; | |
22279 | break; | |
d53d4ac5 | 22280 | |
21ae7a4d JK |
22281 | case DW_OP_const4u: |
22282 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22283 | i += 4; | |
22284 | break; | |
22285 | ||
22286 | case DW_OP_const4s: | |
22287 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22288 | i += 4; | |
22289 | break; | |
22290 | ||
585861ea JK |
22291 | case DW_OP_const8u: |
22292 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22293 | i += 8; | |
22294 | break; | |
22295 | ||
21ae7a4d JK |
22296 | case DW_OP_constu: |
22297 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22298 | &bytes_read); | |
22299 | i += bytes_read; | |
22300 | break; | |
22301 | ||
22302 | case DW_OP_consts: | |
22303 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22304 | i += bytes_read; | |
22305 | break; | |
22306 | ||
22307 | case DW_OP_dup: | |
22308 | stack[stacki + 1] = stack[stacki]; | |
22309 | stacki++; | |
22310 | break; | |
22311 | ||
22312 | case DW_OP_plus: | |
22313 | stack[stacki - 1] += stack[stacki]; | |
22314 | stacki--; | |
22315 | break; | |
22316 | ||
22317 | case DW_OP_plus_uconst: | |
22318 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22319 | &bytes_read); | |
22320 | i += bytes_read; | |
22321 | break; | |
22322 | ||
22323 | case DW_OP_minus: | |
22324 | stack[stacki - 1] -= stack[stacki]; | |
22325 | stacki--; | |
22326 | break; | |
22327 | ||
22328 | case DW_OP_deref: | |
22329 | /* If we're not the last op, then we definitely can't encode | |
22330 | this using GDB's address_class enum. This is valid for partial | |
22331 | global symbols, although the variable's address will be bogus | |
22332 | in the psymtab. */ | |
22333 | if (i < size) | |
22334 | dwarf2_complex_location_expr_complaint (); | |
22335 | break; | |
22336 | ||
22337 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22338 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22339 | /* The top of the stack has the offset from the beginning |
22340 | of the thread control block at which the variable is located. */ | |
22341 | /* Nothing should follow this operator, so the top of stack would | |
22342 | be returned. */ | |
22343 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
22344 | address will be bogus in the psymtab. Make it always at least |
22345 | non-zero to not look as a variable garbage collected by linker | |
22346 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
22347 | if (i < size) |
22348 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 22349 | stack[stacki]++; |
21ae7a4d JK |
22350 | break; |
22351 | ||
22352 | case DW_OP_GNU_uninit: | |
22353 | break; | |
22354 | ||
3019eac3 | 22355 | case DW_OP_GNU_addr_index: |
49f6c839 | 22356 | case DW_OP_GNU_const_index: |
3019eac3 DE |
22357 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
22358 | &bytes_read); | |
22359 | i += bytes_read; | |
22360 | break; | |
22361 | ||
21ae7a4d JK |
22362 | default: |
22363 | { | |
f39c6ffd | 22364 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
22365 | |
22366 | if (name) | |
22367 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
22368 | name); | |
22369 | else | |
22370 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
22371 | op); | |
22372 | } | |
22373 | ||
22374 | return (stack[stacki]); | |
d53d4ac5 | 22375 | } |
3c6e0cb3 | 22376 | |
21ae7a4d JK |
22377 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
22378 | outside of the allocated space. Also enforce minimum>0. */ | |
22379 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
22380 | { | |
22381 | complaint (&symfile_complaints, | |
22382 | _("location description stack overflow")); | |
22383 | return 0; | |
22384 | } | |
22385 | ||
22386 | if (stacki <= 0) | |
22387 | { | |
22388 | complaint (&symfile_complaints, | |
22389 | _("location description stack underflow")); | |
22390 | return 0; | |
22391 | } | |
22392 | } | |
22393 | return (stack[stacki]); | |
c906108c SS |
22394 | } |
22395 | ||
22396 | /* memory allocation interface */ | |
22397 | ||
c906108c | 22398 | static struct dwarf_block * |
7b5a2f43 | 22399 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 22400 | { |
8d749320 | 22401 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
22402 | } |
22403 | ||
c906108c | 22404 | static struct die_info * |
b60c80d6 | 22405 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
22406 | { |
22407 | struct die_info *die; | |
b60c80d6 DJ |
22408 | size_t size = sizeof (struct die_info); |
22409 | ||
22410 | if (num_attrs > 1) | |
22411 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 22412 | |
b60c80d6 | 22413 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
22414 | memset (die, 0, sizeof (struct die_info)); |
22415 | return (die); | |
22416 | } | |
2e276125 JB |
22417 | |
22418 | \f | |
22419 | /* Macro support. */ | |
22420 | ||
233d95b5 JK |
22421 | /* Return file name relative to the compilation directory of file number I in |
22422 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 22423 | responsible for freeing it. */ |
233d95b5 | 22424 | |
2e276125 | 22425 | static char * |
233d95b5 | 22426 | file_file_name (int file, struct line_header *lh) |
2e276125 | 22427 | { |
6a83a1e6 EZ |
22428 | /* Is the file number a valid index into the line header's file name |
22429 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22430 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 22431 | { |
8c43009f | 22432 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 22433 | |
8c43009f PA |
22434 | if (!IS_ABSOLUTE_PATH (fe.name)) |
22435 | { | |
22436 | const char *dir = fe.include_dir (lh); | |
22437 | if (dir != NULL) | |
22438 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
22439 | } | |
22440 | return xstrdup (fe.name); | |
6a83a1e6 | 22441 | } |
2e276125 JB |
22442 | else |
22443 | { | |
6a83a1e6 EZ |
22444 | /* The compiler produced a bogus file number. We can at least |
22445 | record the macro definitions made in the file, even if we | |
22446 | won't be able to find the file by name. */ | |
22447 | char fake_name[80]; | |
9a619af0 | 22448 | |
8c042590 PM |
22449 | xsnprintf (fake_name, sizeof (fake_name), |
22450 | "<bad macro file number %d>", file); | |
2e276125 | 22451 | |
6e70227d | 22452 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
22453 | _("bad file number in macro information (%d)"), |
22454 | file); | |
2e276125 | 22455 | |
6a83a1e6 | 22456 | return xstrdup (fake_name); |
2e276125 JB |
22457 | } |
22458 | } | |
22459 | ||
233d95b5 JK |
22460 | /* Return the full name of file number I in *LH's file name table. |
22461 | Use COMP_DIR as the name of the current directory of the | |
22462 | compilation. The result is allocated using xmalloc; the caller is | |
22463 | responsible for freeing it. */ | |
22464 | static char * | |
22465 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
22466 | { | |
22467 | /* Is the file number a valid index into the line header's file name | |
22468 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22469 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
22470 | { |
22471 | char *relative = file_file_name (file, lh); | |
22472 | ||
22473 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
22474 | return relative; | |
b36cec19 PA |
22475 | return reconcat (relative, comp_dir, SLASH_STRING, |
22476 | relative, (char *) NULL); | |
233d95b5 JK |
22477 | } |
22478 | else | |
22479 | return file_file_name (file, lh); | |
22480 | } | |
22481 | ||
2e276125 JB |
22482 | |
22483 | static struct macro_source_file * | |
22484 | macro_start_file (int file, int line, | |
22485 | struct macro_source_file *current_file, | |
43f3e411 | 22486 | struct line_header *lh) |
2e276125 | 22487 | { |
233d95b5 JK |
22488 | /* File name relative to the compilation directory of this source file. */ |
22489 | char *file_name = file_file_name (file, lh); | |
2e276125 | 22490 | |
2e276125 | 22491 | if (! current_file) |
abc9d0dc | 22492 | { |
fc474241 DE |
22493 | /* Note: We don't create a macro table for this compilation unit |
22494 | at all until we actually get a filename. */ | |
43f3e411 | 22495 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 22496 | |
abc9d0dc TT |
22497 | /* If we have no current file, then this must be the start_file |
22498 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
22499 | current_file = macro_set_main (macro_table, file_name); |
22500 | macro_define_special (macro_table); | |
abc9d0dc | 22501 | } |
2e276125 | 22502 | else |
233d95b5 | 22503 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 22504 | |
233d95b5 | 22505 | xfree (file_name); |
6e70227d | 22506 | |
2e276125 JB |
22507 | return current_file; |
22508 | } | |
22509 | ||
2e276125 JB |
22510 | static const char * |
22511 | consume_improper_spaces (const char *p, const char *body) | |
22512 | { | |
22513 | if (*p == ' ') | |
22514 | { | |
4d3c2250 | 22515 | complaint (&symfile_complaints, |
3e43a32a MS |
22516 | _("macro definition contains spaces " |
22517 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 22518 | body); |
2e276125 JB |
22519 | |
22520 | while (*p == ' ') | |
22521 | p++; | |
22522 | } | |
22523 | ||
22524 | return p; | |
22525 | } | |
22526 | ||
22527 | ||
22528 | static void | |
22529 | parse_macro_definition (struct macro_source_file *file, int line, | |
22530 | const char *body) | |
22531 | { | |
22532 | const char *p; | |
22533 | ||
22534 | /* The body string takes one of two forms. For object-like macro | |
22535 | definitions, it should be: | |
22536 | ||
22537 | <macro name> " " <definition> | |
22538 | ||
22539 | For function-like macro definitions, it should be: | |
22540 | ||
22541 | <macro name> "() " <definition> | |
22542 | or | |
22543 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
22544 | ||
22545 | Spaces may appear only where explicitly indicated, and in the | |
22546 | <definition>. | |
22547 | ||
22548 | The Dwarf 2 spec says that an object-like macro's name is always | |
22549 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 22550 | the space when the macro's definition is the empty string. |
2e276125 JB |
22551 | |
22552 | The Dwarf 2 spec says that there should be no spaces between the | |
22553 | formal arguments in a function-like macro's formal argument list, | |
22554 | but versions of GCC around March 2002 include spaces after the | |
22555 | commas. */ | |
22556 | ||
22557 | ||
22558 | /* Find the extent of the macro name. The macro name is terminated | |
22559 | by either a space or null character (for an object-like macro) or | |
22560 | an opening paren (for a function-like macro). */ | |
22561 | for (p = body; *p; p++) | |
22562 | if (*p == ' ' || *p == '(') | |
22563 | break; | |
22564 | ||
22565 | if (*p == ' ' || *p == '\0') | |
22566 | { | |
22567 | /* It's an object-like macro. */ | |
22568 | int name_len = p - body; | |
3f8a7804 | 22569 | char *name = savestring (body, name_len); |
2e276125 JB |
22570 | const char *replacement; |
22571 | ||
22572 | if (*p == ' ') | |
22573 | replacement = body + name_len + 1; | |
22574 | else | |
22575 | { | |
4d3c2250 | 22576 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22577 | replacement = body + name_len; |
22578 | } | |
6e70227d | 22579 | |
2e276125 JB |
22580 | macro_define_object (file, line, name, replacement); |
22581 | ||
22582 | xfree (name); | |
22583 | } | |
22584 | else if (*p == '(') | |
22585 | { | |
22586 | /* It's a function-like macro. */ | |
3f8a7804 | 22587 | char *name = savestring (body, p - body); |
2e276125 JB |
22588 | int argc = 0; |
22589 | int argv_size = 1; | |
8d749320 | 22590 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
22591 | |
22592 | p++; | |
22593 | ||
22594 | p = consume_improper_spaces (p, body); | |
22595 | ||
22596 | /* Parse the formal argument list. */ | |
22597 | while (*p && *p != ')') | |
22598 | { | |
22599 | /* Find the extent of the current argument name. */ | |
22600 | const char *arg_start = p; | |
22601 | ||
22602 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
22603 | p++; | |
22604 | ||
22605 | if (! *p || p == arg_start) | |
4d3c2250 | 22606 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22607 | else |
22608 | { | |
22609 | /* Make sure argv has room for the new argument. */ | |
22610 | if (argc >= argv_size) | |
22611 | { | |
22612 | argv_size *= 2; | |
224c3ddb | 22613 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
22614 | } |
22615 | ||
3f8a7804 | 22616 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
22617 | } |
22618 | ||
22619 | p = consume_improper_spaces (p, body); | |
22620 | ||
22621 | /* Consume the comma, if present. */ | |
22622 | if (*p == ',') | |
22623 | { | |
22624 | p++; | |
22625 | ||
22626 | p = consume_improper_spaces (p, body); | |
22627 | } | |
22628 | } | |
22629 | ||
22630 | if (*p == ')') | |
22631 | { | |
22632 | p++; | |
22633 | ||
22634 | if (*p == ' ') | |
22635 | /* Perfectly formed definition, no complaints. */ | |
22636 | macro_define_function (file, line, name, | |
6e70227d | 22637 | argc, (const char **) argv, |
2e276125 JB |
22638 | p + 1); |
22639 | else if (*p == '\0') | |
22640 | { | |
22641 | /* Complain, but do define it. */ | |
4d3c2250 | 22642 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 22643 | macro_define_function (file, line, name, |
6e70227d | 22644 | argc, (const char **) argv, |
2e276125 JB |
22645 | p); |
22646 | } | |
22647 | else | |
22648 | /* Just complain. */ | |
4d3c2250 | 22649 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22650 | } |
22651 | else | |
22652 | /* Just complain. */ | |
4d3c2250 | 22653 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22654 | |
22655 | xfree (name); | |
22656 | { | |
22657 | int i; | |
22658 | ||
22659 | for (i = 0; i < argc; i++) | |
22660 | xfree (argv[i]); | |
22661 | } | |
22662 | xfree (argv); | |
22663 | } | |
22664 | else | |
4d3c2250 | 22665 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22666 | } |
22667 | ||
cf2c3c16 TT |
22668 | /* Skip some bytes from BYTES according to the form given in FORM. |
22669 | Returns the new pointer. */ | |
2e276125 | 22670 | |
d521ce57 TT |
22671 | static const gdb_byte * |
22672 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
22673 | enum dwarf_form form, |
22674 | unsigned int offset_size, | |
22675 | struct dwarf2_section_info *section) | |
2e276125 | 22676 | { |
cf2c3c16 | 22677 | unsigned int bytes_read; |
2e276125 | 22678 | |
cf2c3c16 | 22679 | switch (form) |
2e276125 | 22680 | { |
cf2c3c16 TT |
22681 | case DW_FORM_data1: |
22682 | case DW_FORM_flag: | |
22683 | ++bytes; | |
22684 | break; | |
22685 | ||
22686 | case DW_FORM_data2: | |
22687 | bytes += 2; | |
22688 | break; | |
22689 | ||
22690 | case DW_FORM_data4: | |
22691 | bytes += 4; | |
22692 | break; | |
22693 | ||
22694 | case DW_FORM_data8: | |
22695 | bytes += 8; | |
22696 | break; | |
22697 | ||
0224619f JK |
22698 | case DW_FORM_data16: |
22699 | bytes += 16; | |
22700 | break; | |
22701 | ||
cf2c3c16 TT |
22702 | case DW_FORM_string: |
22703 | read_direct_string (abfd, bytes, &bytes_read); | |
22704 | bytes += bytes_read; | |
22705 | break; | |
22706 | ||
22707 | case DW_FORM_sec_offset: | |
22708 | case DW_FORM_strp: | |
36586728 | 22709 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
22710 | bytes += offset_size; |
22711 | break; | |
22712 | ||
22713 | case DW_FORM_block: | |
22714 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
22715 | bytes += bytes_read; | |
22716 | break; | |
22717 | ||
22718 | case DW_FORM_block1: | |
22719 | bytes += 1 + read_1_byte (abfd, bytes); | |
22720 | break; | |
22721 | case DW_FORM_block2: | |
22722 | bytes += 2 + read_2_bytes (abfd, bytes); | |
22723 | break; | |
22724 | case DW_FORM_block4: | |
22725 | bytes += 4 + read_4_bytes (abfd, bytes); | |
22726 | break; | |
22727 | ||
22728 | case DW_FORM_sdata: | |
22729 | case DW_FORM_udata: | |
3019eac3 DE |
22730 | case DW_FORM_GNU_addr_index: |
22731 | case DW_FORM_GNU_str_index: | |
d521ce57 | 22732 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
22733 | if (bytes == NULL) |
22734 | { | |
22735 | dwarf2_section_buffer_overflow_complaint (section); | |
22736 | return NULL; | |
22737 | } | |
cf2c3c16 TT |
22738 | break; |
22739 | ||
663c44ac JK |
22740 | case DW_FORM_implicit_const: |
22741 | break; | |
22742 | ||
cf2c3c16 TT |
22743 | default: |
22744 | { | |
22745 | complain: | |
22746 | complaint (&symfile_complaints, | |
22747 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 22748 | form, get_section_name (section)); |
cf2c3c16 TT |
22749 | return NULL; |
22750 | } | |
2e276125 JB |
22751 | } |
22752 | ||
cf2c3c16 TT |
22753 | return bytes; |
22754 | } | |
757a13d0 | 22755 | |
cf2c3c16 TT |
22756 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
22757 | opcode. Returns an updated pointer to the macro data buffer; or, | |
22758 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 22759 | |
d521ce57 | 22760 | static const gdb_byte * |
cf2c3c16 | 22761 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
22762 | const gdb_byte **opcode_definitions, |
22763 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
22764 | bfd *abfd, |
22765 | unsigned int offset_size, | |
22766 | struct dwarf2_section_info *section) | |
22767 | { | |
22768 | unsigned int bytes_read, i; | |
22769 | unsigned long arg; | |
d521ce57 | 22770 | const gdb_byte *defn; |
2e276125 | 22771 | |
cf2c3c16 | 22772 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 22773 | { |
cf2c3c16 TT |
22774 | complaint (&symfile_complaints, |
22775 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
22776 | opcode); | |
22777 | return NULL; | |
22778 | } | |
2e276125 | 22779 | |
cf2c3c16 TT |
22780 | defn = opcode_definitions[opcode]; |
22781 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
22782 | defn += bytes_read; | |
2e276125 | 22783 | |
cf2c3c16 TT |
22784 | for (i = 0; i < arg; ++i) |
22785 | { | |
aead7601 SM |
22786 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
22787 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 22788 | section); |
cf2c3c16 TT |
22789 | if (mac_ptr == NULL) |
22790 | { | |
22791 | /* skip_form_bytes already issued the complaint. */ | |
22792 | return NULL; | |
22793 | } | |
22794 | } | |
757a13d0 | 22795 | |
cf2c3c16 TT |
22796 | return mac_ptr; |
22797 | } | |
757a13d0 | 22798 | |
cf2c3c16 TT |
22799 | /* A helper function which parses the header of a macro section. |
22800 | If the macro section is the extended (for now called "GNU") type, | |
22801 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
22802 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 22803 | |
d521ce57 TT |
22804 | static const gdb_byte * |
22805 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 22806 | bfd *abfd, |
d521ce57 | 22807 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
22808 | unsigned int *offset_size, |
22809 | int section_is_gnu) | |
22810 | { | |
22811 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 22812 | |
cf2c3c16 TT |
22813 | if (section_is_gnu) |
22814 | { | |
22815 | unsigned int version, flags; | |
757a13d0 | 22816 | |
cf2c3c16 | 22817 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 22818 | if (version != 4 && version != 5) |
cf2c3c16 TT |
22819 | { |
22820 | complaint (&symfile_complaints, | |
22821 | _("unrecognized version `%d' in .debug_macro section"), | |
22822 | version); | |
22823 | return NULL; | |
22824 | } | |
22825 | mac_ptr += 2; | |
757a13d0 | 22826 | |
cf2c3c16 TT |
22827 | flags = read_1_byte (abfd, mac_ptr); |
22828 | ++mac_ptr; | |
22829 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 22830 | |
cf2c3c16 TT |
22831 | if ((flags & 2) != 0) |
22832 | /* We don't need the line table offset. */ | |
22833 | mac_ptr += *offset_size; | |
757a13d0 | 22834 | |
cf2c3c16 TT |
22835 | /* Vendor opcode descriptions. */ |
22836 | if ((flags & 4) != 0) | |
22837 | { | |
22838 | unsigned int i, count; | |
757a13d0 | 22839 | |
cf2c3c16 TT |
22840 | count = read_1_byte (abfd, mac_ptr); |
22841 | ++mac_ptr; | |
22842 | for (i = 0; i < count; ++i) | |
22843 | { | |
22844 | unsigned int opcode, bytes_read; | |
22845 | unsigned long arg; | |
22846 | ||
22847 | opcode = read_1_byte (abfd, mac_ptr); | |
22848 | ++mac_ptr; | |
22849 | opcode_definitions[opcode] = mac_ptr; | |
22850 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22851 | mac_ptr += bytes_read; | |
22852 | mac_ptr += arg; | |
22853 | } | |
757a13d0 | 22854 | } |
cf2c3c16 | 22855 | } |
757a13d0 | 22856 | |
cf2c3c16 TT |
22857 | return mac_ptr; |
22858 | } | |
757a13d0 | 22859 | |
cf2c3c16 | 22860 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 22861 | including DW_MACRO_import. */ |
cf2c3c16 TT |
22862 | |
22863 | static void | |
d521ce57 TT |
22864 | dwarf_decode_macro_bytes (bfd *abfd, |
22865 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 22866 | struct macro_source_file *current_file, |
43f3e411 | 22867 | struct line_header *lh, |
cf2c3c16 | 22868 | struct dwarf2_section_info *section, |
36586728 | 22869 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 22870 | unsigned int offset_size, |
8fc3fc34 | 22871 | htab_t include_hash) |
cf2c3c16 | 22872 | { |
4d663531 | 22873 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22874 | enum dwarf_macro_record_type macinfo_type; |
22875 | int at_commandline; | |
d521ce57 | 22876 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22877 | |
cf2c3c16 TT |
22878 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22879 | &offset_size, section_is_gnu); | |
22880 | if (mac_ptr == NULL) | |
22881 | { | |
22882 | /* We already issued a complaint. */ | |
22883 | return; | |
22884 | } | |
757a13d0 JK |
22885 | |
22886 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22887 | GDB is still reading the definitions from command line. First | |
22888 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22889 | to create CURRENT_FILE for the main source holding also the command line | |
22890 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22891 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22892 | ||
22893 | at_commandline = 1; | |
22894 | ||
22895 | do | |
22896 | { | |
22897 | /* Do we at least have room for a macinfo type byte? */ | |
22898 | if (mac_ptr >= mac_end) | |
22899 | { | |
f664829e | 22900 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22901 | break; |
22902 | } | |
22903 | ||
aead7601 | 22904 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22905 | mac_ptr++; |
22906 | ||
cf2c3c16 TT |
22907 | /* Note that we rely on the fact that the corresponding GNU and |
22908 | DWARF constants are the same. */ | |
757a13d0 JK |
22909 | switch (macinfo_type) |
22910 | { | |
22911 | /* A zero macinfo type indicates the end of the macro | |
22912 | information. */ | |
22913 | case 0: | |
22914 | break; | |
2e276125 | 22915 | |
0af92d60 JK |
22916 | case DW_MACRO_define: |
22917 | case DW_MACRO_undef: | |
22918 | case DW_MACRO_define_strp: | |
22919 | case DW_MACRO_undef_strp: | |
22920 | case DW_MACRO_define_sup: | |
22921 | case DW_MACRO_undef_sup: | |
2e276125 | 22922 | { |
891d2f0b | 22923 | unsigned int bytes_read; |
2e276125 | 22924 | int line; |
d521ce57 | 22925 | const char *body; |
cf2c3c16 | 22926 | int is_define; |
2e276125 | 22927 | |
cf2c3c16 TT |
22928 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22929 | mac_ptr += bytes_read; | |
22930 | ||
0af92d60 JK |
22931 | if (macinfo_type == DW_MACRO_define |
22932 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22933 | { |
22934 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22935 | mac_ptr += bytes_read; | |
22936 | } | |
22937 | else | |
22938 | { | |
22939 | LONGEST str_offset; | |
22940 | ||
22941 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22942 | mac_ptr += offset_size; | |
2e276125 | 22943 | |
0af92d60 JK |
22944 | if (macinfo_type == DW_MACRO_define_sup |
22945 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22946 | || section_is_dwz) |
36586728 TT |
22947 | { |
22948 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22949 | ||
22950 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
22951 | } | |
22952 | else | |
22953 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
22954 | } |
22955 | ||
0af92d60 JK |
22956 | is_define = (macinfo_type == DW_MACRO_define |
22957 | || macinfo_type == DW_MACRO_define_strp | |
22958 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 22959 | if (! current_file) |
757a13d0 JK |
22960 | { |
22961 | /* DWARF violation as no main source is present. */ | |
22962 | complaint (&symfile_complaints, | |
22963 | _("debug info with no main source gives macro %s " | |
22964 | "on line %d: %s"), | |
cf2c3c16 TT |
22965 | is_define ? _("definition") : _("undefinition"), |
22966 | line, body); | |
757a13d0 JK |
22967 | break; |
22968 | } | |
3e43a32a MS |
22969 | if ((line == 0 && !at_commandline) |
22970 | || (line != 0 && at_commandline)) | |
4d3c2250 | 22971 | complaint (&symfile_complaints, |
757a13d0 JK |
22972 | _("debug info gives %s macro %s with %s line %d: %s"), |
22973 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 22974 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
22975 | line == 0 ? _("zero") : _("non-zero"), line, body); |
22976 | ||
cf2c3c16 | 22977 | if (is_define) |
757a13d0 | 22978 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
22979 | else |
22980 | { | |
0af92d60 JK |
22981 | gdb_assert (macinfo_type == DW_MACRO_undef |
22982 | || macinfo_type == DW_MACRO_undef_strp | |
22983 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
22984 | macro_undef (current_file, line, body); |
22985 | } | |
2e276125 JB |
22986 | } |
22987 | break; | |
22988 | ||
0af92d60 | 22989 | case DW_MACRO_start_file: |
2e276125 | 22990 | { |
891d2f0b | 22991 | unsigned int bytes_read; |
2e276125 JB |
22992 | int line, file; |
22993 | ||
22994 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22995 | mac_ptr += bytes_read; | |
22996 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22997 | mac_ptr += bytes_read; | |
22998 | ||
3e43a32a MS |
22999 | if ((line == 0 && !at_commandline) |
23000 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
23001 | complaint (&symfile_complaints, |
23002 | _("debug info gives source %d included " | |
23003 | "from %s at %s line %d"), | |
23004 | file, at_commandline ? _("command-line") : _("file"), | |
23005 | line == 0 ? _("zero") : _("non-zero"), line); | |
23006 | ||
23007 | if (at_commandline) | |
23008 | { | |
0af92d60 | 23009 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 23010 | pass one. */ |
757a13d0 JK |
23011 | at_commandline = 0; |
23012 | } | |
23013 | else | |
43f3e411 | 23014 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
23015 | } |
23016 | break; | |
23017 | ||
0af92d60 | 23018 | case DW_MACRO_end_file: |
2e276125 | 23019 | if (! current_file) |
4d3c2250 | 23020 | complaint (&symfile_complaints, |
3e43a32a MS |
23021 | _("macro debug info has an unmatched " |
23022 | "`close_file' directive")); | |
2e276125 JB |
23023 | else |
23024 | { | |
23025 | current_file = current_file->included_by; | |
23026 | if (! current_file) | |
23027 | { | |
cf2c3c16 | 23028 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
23029 | |
23030 | /* GCC circa March 2002 doesn't produce the zero | |
23031 | type byte marking the end of the compilation | |
23032 | unit. Complain if it's not there, but exit no | |
23033 | matter what. */ | |
23034 | ||
23035 | /* Do we at least have room for a macinfo type byte? */ | |
23036 | if (mac_ptr >= mac_end) | |
23037 | { | |
f664829e | 23038 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
23039 | return; |
23040 | } | |
23041 | ||
23042 | /* We don't increment mac_ptr here, so this is just | |
23043 | a look-ahead. */ | |
aead7601 SM |
23044 | next_type |
23045 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
23046 | mac_ptr); | |
2e276125 | 23047 | if (next_type != 0) |
4d3c2250 | 23048 | complaint (&symfile_complaints, |
3e43a32a MS |
23049 | _("no terminating 0-type entry for " |
23050 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
23051 | |
23052 | return; | |
23053 | } | |
23054 | } | |
23055 | break; | |
23056 | ||
0af92d60 JK |
23057 | case DW_MACRO_import: |
23058 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
23059 | { |
23060 | LONGEST offset; | |
8fc3fc34 | 23061 | void **slot; |
a036ba48 TT |
23062 | bfd *include_bfd = abfd; |
23063 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 23064 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 23065 | int is_dwz = section_is_dwz; |
d521ce57 | 23066 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
23067 | |
23068 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
23069 | mac_ptr += offset_size; | |
23070 | ||
0af92d60 | 23071 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
23072 | { |
23073 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
23074 | ||
4d663531 | 23075 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 23076 | |
a036ba48 | 23077 | include_section = &dwz->macro; |
a32a8923 | 23078 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
23079 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
23080 | is_dwz = 1; | |
23081 | } | |
23082 | ||
23083 | new_mac_ptr = include_section->buffer + offset; | |
23084 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
23085 | ||
8fc3fc34 TT |
23086 | if (*slot != NULL) |
23087 | { | |
23088 | /* This has actually happened; see | |
23089 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
23090 | complaint (&symfile_complaints, | |
0af92d60 | 23091 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
23092 | ".debug_macro section")); |
23093 | } | |
23094 | else | |
23095 | { | |
d521ce57 | 23096 | *slot = (void *) new_mac_ptr; |
36586728 | 23097 | |
a036ba48 | 23098 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 23099 | include_mac_end, current_file, lh, |
36586728 | 23100 | section, section_is_gnu, is_dwz, |
4d663531 | 23101 | offset_size, include_hash); |
8fc3fc34 | 23102 | |
d521ce57 | 23103 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 23104 | } |
cf2c3c16 TT |
23105 | } |
23106 | break; | |
23107 | ||
2e276125 | 23108 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
23109 | if (!section_is_gnu) |
23110 | { | |
23111 | unsigned int bytes_read; | |
2e276125 | 23112 | |
ac298888 TT |
23113 | /* This reads the constant, but since we don't recognize |
23114 | any vendor extensions, we ignore it. */ | |
23115 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
23116 | mac_ptr += bytes_read; |
23117 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23118 | mac_ptr += bytes_read; | |
2e276125 | 23119 | |
cf2c3c16 TT |
23120 | /* We don't recognize any vendor extensions. */ |
23121 | break; | |
23122 | } | |
23123 | /* FALLTHROUGH */ | |
23124 | ||
23125 | default: | |
23126 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23127 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23128 | section); |
23129 | if (mac_ptr == NULL) | |
23130 | return; | |
23131 | break; | |
2e276125 | 23132 | } |
757a13d0 | 23133 | } while (macinfo_type != 0); |
2e276125 | 23134 | } |
8e19ed76 | 23135 | |
cf2c3c16 | 23136 | static void |
09262596 | 23137 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 23138 | int section_is_gnu) |
cf2c3c16 | 23139 | { |
bb5ed363 | 23140 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
23141 | struct line_header *lh = cu->line_header; |
23142 | bfd *abfd; | |
d521ce57 | 23143 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
23144 | struct macro_source_file *current_file = 0; |
23145 | enum dwarf_macro_record_type macinfo_type; | |
23146 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 23147 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 23148 | void **slot; |
09262596 DE |
23149 | struct dwarf2_section_info *section; |
23150 | const char *section_name; | |
23151 | ||
23152 | if (cu->dwo_unit != NULL) | |
23153 | { | |
23154 | if (section_is_gnu) | |
23155 | { | |
23156 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
23157 | section_name = ".debug_macro.dwo"; | |
23158 | } | |
23159 | else | |
23160 | { | |
23161 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
23162 | section_name = ".debug_macinfo.dwo"; | |
23163 | } | |
23164 | } | |
23165 | else | |
23166 | { | |
23167 | if (section_is_gnu) | |
23168 | { | |
23169 | section = &dwarf2_per_objfile->macro; | |
23170 | section_name = ".debug_macro"; | |
23171 | } | |
23172 | else | |
23173 | { | |
23174 | section = &dwarf2_per_objfile->macinfo; | |
23175 | section_name = ".debug_macinfo"; | |
23176 | } | |
23177 | } | |
cf2c3c16 | 23178 | |
bb5ed363 | 23179 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
23180 | if (section->buffer == NULL) |
23181 | { | |
fceca515 | 23182 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
23183 | return; |
23184 | } | |
a32a8923 | 23185 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
23186 | |
23187 | /* First pass: Find the name of the base filename. | |
23188 | This filename is needed in order to process all macros whose definition | |
23189 | (or undefinition) comes from the command line. These macros are defined | |
23190 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
23191 | associated to the base file. | |
23192 | ||
23193 | To determine the base file name, we scan the macro definitions until we | |
23194 | reach the first DW_MACINFO_start_file entry. We then initialize | |
23195 | CURRENT_FILE accordingly so that any macro definition found before the | |
23196 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
23197 | ||
23198 | mac_ptr = section->buffer + offset; | |
23199 | mac_end = section->buffer + section->size; | |
23200 | ||
23201 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
23202 | &offset_size, section_is_gnu); | |
23203 | if (mac_ptr == NULL) | |
23204 | { | |
23205 | /* We already issued a complaint. */ | |
23206 | return; | |
23207 | } | |
23208 | ||
23209 | do | |
23210 | { | |
23211 | /* Do we at least have room for a macinfo type byte? */ | |
23212 | if (mac_ptr >= mac_end) | |
23213 | { | |
23214 | /* Complaint is printed during the second pass as GDB will probably | |
23215 | stop the first pass earlier upon finding | |
23216 | DW_MACINFO_start_file. */ | |
23217 | break; | |
23218 | } | |
23219 | ||
aead7601 | 23220 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
23221 | mac_ptr++; |
23222 | ||
23223 | /* Note that we rely on the fact that the corresponding GNU and | |
23224 | DWARF constants are the same. */ | |
23225 | switch (macinfo_type) | |
23226 | { | |
23227 | /* A zero macinfo type indicates the end of the macro | |
23228 | information. */ | |
23229 | case 0: | |
23230 | break; | |
23231 | ||
0af92d60 JK |
23232 | case DW_MACRO_define: |
23233 | case DW_MACRO_undef: | |
cf2c3c16 TT |
23234 | /* Only skip the data by MAC_PTR. */ |
23235 | { | |
23236 | unsigned int bytes_read; | |
23237 | ||
23238 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23239 | mac_ptr += bytes_read; | |
23240 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23241 | mac_ptr += bytes_read; | |
23242 | } | |
23243 | break; | |
23244 | ||
0af92d60 | 23245 | case DW_MACRO_start_file: |
cf2c3c16 TT |
23246 | { |
23247 | unsigned int bytes_read; | |
23248 | int line, file; | |
23249 | ||
23250 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23251 | mac_ptr += bytes_read; | |
23252 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23253 | mac_ptr += bytes_read; | |
23254 | ||
43f3e411 | 23255 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
23256 | } |
23257 | break; | |
23258 | ||
0af92d60 | 23259 | case DW_MACRO_end_file: |
cf2c3c16 TT |
23260 | /* No data to skip by MAC_PTR. */ |
23261 | break; | |
23262 | ||
0af92d60 JK |
23263 | case DW_MACRO_define_strp: |
23264 | case DW_MACRO_undef_strp: | |
23265 | case DW_MACRO_define_sup: | |
23266 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
23267 | { |
23268 | unsigned int bytes_read; | |
23269 | ||
23270 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23271 | mac_ptr += bytes_read; | |
23272 | mac_ptr += offset_size; | |
23273 | } | |
23274 | break; | |
23275 | ||
0af92d60 JK |
23276 | case DW_MACRO_import: |
23277 | case DW_MACRO_import_sup: | |
cf2c3c16 | 23278 | /* Note that, according to the spec, a transparent include |
0af92d60 | 23279 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
23280 | skip this opcode. */ |
23281 | mac_ptr += offset_size; | |
23282 | break; | |
23283 | ||
23284 | case DW_MACINFO_vendor_ext: | |
23285 | /* Only skip the data by MAC_PTR. */ | |
23286 | if (!section_is_gnu) | |
23287 | { | |
23288 | unsigned int bytes_read; | |
23289 | ||
23290 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23291 | mac_ptr += bytes_read; | |
23292 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23293 | mac_ptr += bytes_read; | |
23294 | } | |
23295 | /* FALLTHROUGH */ | |
23296 | ||
23297 | default: | |
23298 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23299 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23300 | section); |
23301 | if (mac_ptr == NULL) | |
23302 | return; | |
23303 | break; | |
23304 | } | |
23305 | } while (macinfo_type != 0 && current_file == NULL); | |
23306 | ||
23307 | /* Second pass: Process all entries. | |
23308 | ||
23309 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
23310 | command-line macro definitions/undefinitions. This flag is unset when we | |
23311 | reach the first DW_MACINFO_start_file entry. */ | |
23312 | ||
fc4007c9 TT |
23313 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
23314 | htab_eq_pointer, | |
23315 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 23316 | mac_ptr = section->buffer + offset; |
fc4007c9 | 23317 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 23318 | *slot = (void *) mac_ptr; |
8fc3fc34 | 23319 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 23320 | current_file, lh, section, |
fc4007c9 TT |
23321 | section_is_gnu, 0, offset_size, |
23322 | include_hash.get ()); | |
cf2c3c16 TT |
23323 | } |
23324 | ||
8e19ed76 | 23325 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 23326 | if so return true else false. */ |
380bca97 | 23327 | |
8e19ed76 | 23328 | static int |
6e5a29e1 | 23329 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
23330 | { |
23331 | return (attr == NULL ? 0 : | |
23332 | attr->form == DW_FORM_block1 | |
23333 | || attr->form == DW_FORM_block2 | |
23334 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
23335 | || attr->form == DW_FORM_block |
23336 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 23337 | } |
4c2df51b | 23338 | |
c6a0999f JB |
23339 | /* Return non-zero if ATTR's value is a section offset --- classes |
23340 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
23341 | You may use DW_UNSND (attr) to retrieve such offsets. | |
23342 | ||
23343 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
23344 | may have a value that belongs to more than one of these classes; it | |
23345 | would be ambiguous if we did, because we use the same forms for all | |
23346 | of them. */ | |
380bca97 | 23347 | |
3690dd37 | 23348 | static int |
6e5a29e1 | 23349 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
23350 | { |
23351 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
23352 | || attr->form == DW_FORM_data8 |
23353 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
23354 | } |
23355 | ||
3690dd37 JB |
23356 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
23357 | zero otherwise. When this function returns true, you can apply | |
23358 | dwarf2_get_attr_constant_value to it. | |
23359 | ||
23360 | However, note that for some attributes you must check | |
23361 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
23362 | and DW_FORM_data8 are members of both the constant class, and of | |
23363 | the classes that contain offsets into other debug sections | |
23364 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
23365 | that, if an attribute's can be either a constant or one of the | |
23366 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
23367 | taken as section offsets, not constants. |
23368 | ||
23369 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
23370 | cannot handle that. */ | |
380bca97 | 23371 | |
3690dd37 | 23372 | static int |
6e5a29e1 | 23373 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
23374 | { |
23375 | switch (attr->form) | |
23376 | { | |
23377 | case DW_FORM_sdata: | |
23378 | case DW_FORM_udata: | |
23379 | case DW_FORM_data1: | |
23380 | case DW_FORM_data2: | |
23381 | case DW_FORM_data4: | |
23382 | case DW_FORM_data8: | |
663c44ac | 23383 | case DW_FORM_implicit_const: |
3690dd37 JB |
23384 | return 1; |
23385 | default: | |
23386 | return 0; | |
23387 | } | |
23388 | } | |
23389 | ||
7771576e SA |
23390 | |
23391 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
23392 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
23393 | ||
23394 | static int | |
6e5a29e1 | 23395 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
23396 | { |
23397 | switch (attr->form) | |
23398 | { | |
23399 | case DW_FORM_ref_addr: | |
23400 | case DW_FORM_ref1: | |
23401 | case DW_FORM_ref2: | |
23402 | case DW_FORM_ref4: | |
23403 | case DW_FORM_ref8: | |
23404 | case DW_FORM_ref_udata: | |
23405 | case DW_FORM_GNU_ref_alt: | |
23406 | return 1; | |
23407 | default: | |
23408 | return 0; | |
23409 | } | |
23410 | } | |
23411 | ||
3019eac3 DE |
23412 | /* Return the .debug_loc section to use for CU. |
23413 | For DWO files use .debug_loc.dwo. */ | |
23414 | ||
23415 | static struct dwarf2_section_info * | |
23416 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23417 | { | |
23418 | if (cu->dwo_unit) | |
43988095 JK |
23419 | { |
23420 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
23421 | ||
23422 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
23423 | } | |
23424 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23425 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23426 | } |
23427 | ||
8cf6f0b1 TT |
23428 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23429 | ||
23430 | static void | |
23431 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23432 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23433 | const struct attribute *attr) |
8cf6f0b1 | 23434 | { |
3019eac3 DE |
23435 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23436 | ||
23437 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
23438 | |
23439 | baton->per_cu = cu->per_cu; | |
23440 | gdb_assert (baton->per_cu); | |
23441 | /* We don't know how long the location list is, but make sure we | |
23442 | don't run off the edge of the section. */ | |
3019eac3 DE |
23443 | baton->size = section->size - DW_UNSND (attr); |
23444 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23445 | baton->base_address = cu->base_address; |
f664829e | 23446 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23447 | } |
23448 | ||
4c2df51b | 23449 | static void |
ff39bb5e | 23450 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23451 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23452 | { |
bb5ed363 | 23453 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23454 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23455 | |
3690dd37 | 23456 | if (attr_form_is_section_offset (attr) |
3019eac3 | 23457 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23458 | the section. If so, fall through to the complaint in the |
23459 | other branch. */ | |
3019eac3 | 23460 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 23461 | { |
0d53c4c4 | 23462 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23463 | |
8d749320 | 23464 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23465 | |
8cf6f0b1 | 23466 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23467 | |
d00adf39 | 23468 | if (cu->base_known == 0) |
0d53c4c4 | 23469 | complaint (&symfile_complaints, |
3e43a32a MS |
23470 | _("Location list used without " |
23471 | "specifying the CU base address.")); | |
4c2df51b | 23472 | |
f1e6e072 TT |
23473 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23474 | ? dwarf2_loclist_block_index | |
23475 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
23476 | SYMBOL_LOCATION_BATON (sym) = baton; |
23477 | } | |
23478 | else | |
23479 | { | |
23480 | struct dwarf2_locexpr_baton *baton; | |
23481 | ||
8d749320 | 23482 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
23483 | baton->per_cu = cu->per_cu; |
23484 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
23485 | |
23486 | if (attr_form_is_block (attr)) | |
23487 | { | |
23488 | /* Note that we're just copying the block's data pointer | |
23489 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
23490 | info_buffer for SYM's objfile; right now we never release |
23491 | that buffer, but when we do clean up properly this may | |
23492 | need to change. */ | |
0d53c4c4 DJ |
23493 | baton->size = DW_BLOCK (attr)->size; |
23494 | baton->data = DW_BLOCK (attr)->data; | |
23495 | } | |
23496 | else | |
23497 | { | |
23498 | dwarf2_invalid_attrib_class_complaint ("location description", | |
23499 | SYMBOL_NATURAL_NAME (sym)); | |
23500 | baton->size = 0; | |
0d53c4c4 | 23501 | } |
6e70227d | 23502 | |
f1e6e072 TT |
23503 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23504 | ? dwarf2_locexpr_block_index | |
23505 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
23506 | SYMBOL_LOCATION_BATON (sym) = baton; |
23507 | } | |
4c2df51b | 23508 | } |
6502dd73 | 23509 | |
9aa1f1e3 TT |
23510 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
23511 | came from a separate debuginfo file, then the master objfile is | |
23512 | returned. */ | |
ae0d2f24 UW |
23513 | |
23514 | struct objfile * | |
23515 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
23516 | { | |
9291a0cd | 23517 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
23518 | |
23519 | /* Return the master objfile, so that we can report and look up the | |
23520 | correct file containing this variable. */ | |
23521 | if (objfile->separate_debug_objfile_backlink) | |
23522 | objfile = objfile->separate_debug_objfile_backlink; | |
23523 | ||
23524 | return objfile; | |
23525 | } | |
23526 | ||
96408a79 SA |
23527 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
23528 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
23529 | CU_HEADERP first. */ | |
23530 | ||
23531 | static const struct comp_unit_head * | |
23532 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
23533 | struct dwarf2_per_cu_data *per_cu) | |
23534 | { | |
d521ce57 | 23535 | const gdb_byte *info_ptr; |
96408a79 SA |
23536 | |
23537 | if (per_cu->cu) | |
23538 | return &per_cu->cu->header; | |
23539 | ||
9c541725 | 23540 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
23541 | |
23542 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
23543 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
23544 | rcuh_kind::COMPILE); | |
96408a79 SA |
23545 | |
23546 | return cu_headerp; | |
23547 | } | |
23548 | ||
ae0d2f24 UW |
23549 | /* Return the address size given in the compilation unit header for CU. */ |
23550 | ||
98714339 | 23551 | int |
ae0d2f24 UW |
23552 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
23553 | { | |
96408a79 SA |
23554 | struct comp_unit_head cu_header_local; |
23555 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 23556 | |
96408a79 SA |
23557 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23558 | ||
23559 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
23560 | } |
23561 | ||
9eae7c52 TT |
23562 | /* Return the offset size given in the compilation unit header for CU. */ |
23563 | ||
23564 | int | |
23565 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
23566 | { | |
96408a79 SA |
23567 | struct comp_unit_head cu_header_local; |
23568 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 23569 | |
96408a79 SA |
23570 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23571 | ||
23572 | return cu_headerp->offset_size; | |
23573 | } | |
23574 | ||
23575 | /* See its dwarf2loc.h declaration. */ | |
23576 | ||
23577 | int | |
23578 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
23579 | { | |
23580 | struct comp_unit_head cu_header_local; | |
23581 | const struct comp_unit_head *cu_headerp; | |
23582 | ||
23583 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
23584 | ||
23585 | if (cu_headerp->version == 2) | |
23586 | return cu_headerp->addr_size; | |
23587 | else | |
23588 | return cu_headerp->offset_size; | |
181cebd4 JK |
23589 | } |
23590 | ||
9aa1f1e3 TT |
23591 | /* Return the text offset of the CU. The returned offset comes from |
23592 | this CU's objfile. If this objfile came from a separate debuginfo | |
23593 | file, then the offset may be different from the corresponding | |
23594 | offset in the parent objfile. */ | |
23595 | ||
23596 | CORE_ADDR | |
23597 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
23598 | { | |
bb3fa9d0 | 23599 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
23600 | |
23601 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23602 | } | |
23603 | ||
43988095 JK |
23604 | /* Return DWARF version number of PER_CU. */ |
23605 | ||
23606 | short | |
23607 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
23608 | { | |
23609 | return per_cu->dwarf_version; | |
23610 | } | |
23611 | ||
348e048f DE |
23612 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
23613 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
23614 | |
23615 | static struct dwarf2_per_cu_data * | |
9c541725 | 23616 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 23617 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
23618 | struct objfile *objfile) |
23619 | { | |
23620 | struct dwarf2_per_cu_data *this_cu; | |
23621 | int low, high; | |
36586728 | 23622 | const sect_offset *cu_off; |
ae038cb0 | 23623 | |
ae038cb0 DJ |
23624 | low = 0; |
23625 | high = dwarf2_per_objfile->n_comp_units - 1; | |
23626 | while (high > low) | |
23627 | { | |
36586728 | 23628 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 23629 | int mid = low + (high - low) / 2; |
9a619af0 | 23630 | |
36586728 | 23631 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 23632 | cu_off = &mid_cu->sect_off; |
36586728 | 23633 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 23634 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
23635 | high = mid; |
23636 | else | |
23637 | low = mid + 1; | |
23638 | } | |
23639 | gdb_assert (low == high); | |
36586728 | 23640 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
23641 | cu_off = &this_cu->sect_off; |
23642 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 23643 | { |
36586728 | 23644 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 23645 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
23646 | "offset 0x%x [in module %s]"), |
23647 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 23648 | |
9c541725 PA |
23649 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
23650 | <= sect_off); | |
ae038cb0 DJ |
23651 | return dwarf2_per_objfile->all_comp_units[low-1]; |
23652 | } | |
23653 | else | |
23654 | { | |
23655 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
23656 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
23657 | && sect_off >= this_cu->sect_off + this_cu->length) |
23658 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
23659 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
23660 | return this_cu; |
23661 | } | |
23662 | } | |
23663 | ||
23745b47 | 23664 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 23665 | |
9816fde3 | 23666 | static void |
23745b47 | 23667 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 23668 | { |
9816fde3 | 23669 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
23670 | per_cu->cu = cu; |
23671 | cu->per_cu = per_cu; | |
23672 | cu->objfile = per_cu->objfile; | |
93311388 | 23673 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
23674 | } |
23675 | ||
23676 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
23677 | ||
23678 | static void | |
95554aad TT |
23679 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
23680 | enum language pretend_language) | |
9816fde3 JK |
23681 | { |
23682 | struct attribute *attr; | |
23683 | ||
23684 | /* Set the language we're debugging. */ | |
23685 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
23686 | if (attr) | |
23687 | set_cu_language (DW_UNSND (attr), cu); | |
23688 | else | |
9cded63f | 23689 | { |
95554aad | 23690 | cu->language = pretend_language; |
9cded63f TT |
23691 | cu->language_defn = language_def (cu->language); |
23692 | } | |
dee91e82 | 23693 | |
7d45c7c3 | 23694 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
23695 | } |
23696 | ||
ae038cb0 DJ |
23697 | /* Release one cached compilation unit, CU. We unlink it from the tree |
23698 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
23699 | the caller is responsible for that. |
23700 | NOTE: DATA is a void * because this function is also used as a | |
23701 | cleanup routine. */ | |
ae038cb0 DJ |
23702 | |
23703 | static void | |
68dc6402 | 23704 | free_heap_comp_unit (void *data) |
ae038cb0 | 23705 | { |
9a3c8263 | 23706 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 23707 | |
23745b47 DE |
23708 | gdb_assert (cu->per_cu != NULL); |
23709 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
23710 | cu->per_cu = NULL; |
23711 | ||
23712 | obstack_free (&cu->comp_unit_obstack, NULL); | |
23713 | ||
23714 | xfree (cu); | |
23715 | } | |
23716 | ||
72bf9492 | 23717 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 23718 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 23719 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
23720 | |
23721 | static void | |
23722 | free_stack_comp_unit (void *data) | |
23723 | { | |
9a3c8263 | 23724 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 23725 | |
23745b47 DE |
23726 | gdb_assert (cu->per_cu != NULL); |
23727 | cu->per_cu->cu = NULL; | |
23728 | cu->per_cu = NULL; | |
23729 | ||
72bf9492 DJ |
23730 | obstack_free (&cu->comp_unit_obstack, NULL); |
23731 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
23732 | } |
23733 | ||
23734 | /* Free all cached compilation units. */ | |
23735 | ||
23736 | static void | |
23737 | free_cached_comp_units (void *data) | |
23738 | { | |
330cdd98 | 23739 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
23740 | } |
23741 | ||
23742 | /* Increase the age counter on each cached compilation unit, and free | |
23743 | any that are too old. */ | |
23744 | ||
23745 | static void | |
23746 | age_cached_comp_units (void) | |
23747 | { | |
23748 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23749 | ||
23750 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
23751 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23752 | while (per_cu != NULL) | |
23753 | { | |
23754 | per_cu->cu->last_used ++; | |
b4f54984 | 23755 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
23756 | dwarf2_mark (per_cu->cu); |
23757 | per_cu = per_cu->cu->read_in_chain; | |
23758 | } | |
23759 | ||
23760 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23761 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23762 | while (per_cu != NULL) | |
23763 | { | |
23764 | struct dwarf2_per_cu_data *next_cu; | |
23765 | ||
23766 | next_cu = per_cu->cu->read_in_chain; | |
23767 | ||
23768 | if (!per_cu->cu->mark) | |
23769 | { | |
68dc6402 | 23770 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
23771 | *last_chain = next_cu; |
23772 | } | |
23773 | else | |
23774 | last_chain = &per_cu->cu->read_in_chain; | |
23775 | ||
23776 | per_cu = next_cu; | |
23777 | } | |
23778 | } | |
23779 | ||
23780 | /* Remove a single compilation unit from the cache. */ | |
23781 | ||
23782 | static void | |
dee91e82 | 23783 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
23784 | { |
23785 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23786 | ||
23787 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23788 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23789 | while (per_cu != NULL) | |
23790 | { | |
23791 | struct dwarf2_per_cu_data *next_cu; | |
23792 | ||
23793 | next_cu = per_cu->cu->read_in_chain; | |
23794 | ||
dee91e82 | 23795 | if (per_cu == target_per_cu) |
ae038cb0 | 23796 | { |
68dc6402 | 23797 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 23798 | per_cu->cu = NULL; |
ae038cb0 DJ |
23799 | *last_chain = next_cu; |
23800 | break; | |
23801 | } | |
23802 | else | |
23803 | last_chain = &per_cu->cu->read_in_chain; | |
23804 | ||
23805 | per_cu = next_cu; | |
23806 | } | |
23807 | } | |
23808 | ||
fe3e1990 DJ |
23809 | /* Release all extra memory associated with OBJFILE. */ |
23810 | ||
23811 | void | |
23812 | dwarf2_free_objfile (struct objfile *objfile) | |
23813 | { | |
9a3c8263 SM |
23814 | dwarf2_per_objfile |
23815 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23816 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
23817 | |
23818 | if (dwarf2_per_objfile == NULL) | |
23819 | return; | |
23820 | ||
330cdd98 | 23821 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
23822 | } |
23823 | ||
dee91e82 DE |
23824 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23825 | We store these in a hash table separate from the DIEs, and preserve them | |
23826 | when the DIEs are flushed out of cache. | |
23827 | ||
23828 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23829 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23830 | or the type may come from a DWO file. Furthermore, while it's more logical |
23831 | to use per_cu->section+offset, with Fission the section with the data is in | |
23832 | the DWO file but we don't know that section at the point we need it. | |
23833 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23834 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23835 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23836 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23837 | |
dee91e82 | 23838 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23839 | { |
dee91e82 | 23840 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23841 | sect_offset sect_off; |
1c379e20 DJ |
23842 | struct type *type; |
23843 | }; | |
23844 | ||
dee91e82 | 23845 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23846 | |
23847 | static hashval_t | |
dee91e82 | 23848 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23849 | { |
9a3c8263 SM |
23850 | const struct dwarf2_per_cu_offset_and_type *ofs |
23851 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23852 | |
9c541725 | 23853 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23854 | } |
23855 | ||
dee91e82 | 23856 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23857 | |
23858 | static int | |
dee91e82 | 23859 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23860 | { |
9a3c8263 SM |
23861 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23862 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23863 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23864 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23865 | |
dee91e82 | 23866 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23867 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23868 | } |
23869 | ||
23870 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23871 | table if necessary. For convenience, return TYPE. |
23872 | ||
23873 | The DIEs reading must have careful ordering to: | |
23874 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23875 | reading current DIE. | |
23876 | * Not trying to dereference contents of still incompletely read in types | |
23877 | while reading in other DIEs. | |
23878 | * Enable referencing still incompletely read in types just by a pointer to | |
23879 | the type without accessing its fields. | |
23880 | ||
23881 | Therefore caller should follow these rules: | |
23882 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23883 | before building the type and calling set_die_type. | |
e71ec853 | 23884 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23885 | possible before fetching more types to complete the current type. |
23886 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23887 | |
f792889a | 23888 | static struct type * |
1c379e20 DJ |
23889 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23890 | { | |
dee91e82 | 23891 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23892 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23893 | struct attribute *attr; |
23894 | struct dynamic_prop prop; | |
1c379e20 | 23895 | |
b4ba55a1 JB |
23896 | /* For Ada types, make sure that the gnat-specific data is always |
23897 | initialized (if not already set). There are a few types where | |
23898 | we should not be doing so, because the type-specific area is | |
23899 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23900 | where the type-specific area is used to store the floatformat). | |
23901 | But this is not a problem, because the gnat-specific information | |
23902 | is actually not needed for these types. */ | |
23903 | if (need_gnat_info (cu) | |
23904 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23905 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23906 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23907 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23908 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23909 | && !HAVE_GNAT_AUX_INFO (type)) |
23910 | INIT_GNAT_SPECIFIC (type); | |
23911 | ||
3f2f83dd KB |
23912 | /* Read DW_AT_allocated and set in type. */ |
23913 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23914 | if (attr_form_is_block (attr)) | |
23915 | { | |
23916 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23917 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23918 | } | |
23919 | else if (attr != NULL) | |
23920 | { | |
23921 | complaint (&symfile_complaints, | |
9c541725 PA |
23922 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23923 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23924 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23925 | } |
23926 | ||
23927 | /* Read DW_AT_associated and set in type. */ | |
23928 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23929 | if (attr_form_is_block (attr)) | |
23930 | { | |
23931 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23932 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23933 | } | |
23934 | else if (attr != NULL) | |
23935 | { | |
23936 | complaint (&symfile_complaints, | |
9c541725 PA |
23937 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23938 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23939 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23940 | } |
23941 | ||
3cdcd0ce JB |
23942 | /* Read DW_AT_data_location and set in type. */ |
23943 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23944 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23945 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23946 | |
dee91e82 | 23947 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23948 | { |
dee91e82 DE |
23949 | dwarf2_per_objfile->die_type_hash = |
23950 | htab_create_alloc_ex (127, | |
23951 | per_cu_offset_and_type_hash, | |
23952 | per_cu_offset_and_type_eq, | |
23953 | NULL, | |
23954 | &objfile->objfile_obstack, | |
23955 | hashtab_obstack_allocate, | |
23956 | dummy_obstack_deallocate); | |
f792889a | 23957 | } |
1c379e20 | 23958 | |
dee91e82 | 23959 | ofs.per_cu = cu->per_cu; |
9c541725 | 23960 | ofs.sect_off = die->sect_off; |
1c379e20 | 23961 | ofs.type = type; |
dee91e82 DE |
23962 | slot = (struct dwarf2_per_cu_offset_and_type **) |
23963 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
23964 | if (*slot) |
23965 | complaint (&symfile_complaints, | |
23966 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 23967 | to_underlying (die->sect_off)); |
8d749320 SM |
23968 | *slot = XOBNEW (&objfile->objfile_obstack, |
23969 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23970 | **slot = ofs; |
f792889a | 23971 | return type; |
1c379e20 DJ |
23972 | } |
23973 | ||
9c541725 | 23974 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23975 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23976 | |
23977 | static struct type * | |
9c541725 | 23978 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23979 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23980 | { |
dee91e82 | 23981 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 23982 | |
dee91e82 | 23983 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23984 | return NULL; |
1c379e20 | 23985 | |
dee91e82 | 23986 | ofs.per_cu = per_cu; |
9c541725 | 23987 | ofs.sect_off = sect_off; |
9a3c8263 SM |
23988 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
23989 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
23990 | if (slot) |
23991 | return slot->type; | |
23992 | else | |
23993 | return NULL; | |
23994 | } | |
23995 | ||
02142a6c | 23996 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23997 | or return NULL if DIE does not have a saved type. */ |
23998 | ||
23999 | static struct type * | |
24000 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
24001 | { | |
9c541725 | 24002 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
24003 | } |
24004 | ||
10b3939b DJ |
24005 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
24006 | ||
24007 | static void | |
24008 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
24009 | struct dwarf2_per_cu_data *ref_per_cu) | |
24010 | { | |
24011 | void **slot; | |
24012 | ||
24013 | if (cu->dependencies == NULL) | |
24014 | cu->dependencies | |
24015 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
24016 | NULL, &cu->comp_unit_obstack, | |
24017 | hashtab_obstack_allocate, | |
24018 | dummy_obstack_deallocate); | |
24019 | ||
24020 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
24021 | if (*slot == NULL) | |
24022 | *slot = ref_per_cu; | |
24023 | } | |
1c379e20 | 24024 | |
f504f079 DE |
24025 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
24026 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
24027 | cache that we must keep because we are keeping CU. */ |
24028 | ||
10b3939b DJ |
24029 | static int |
24030 | dwarf2_mark_helper (void **slot, void *data) | |
24031 | { | |
24032 | struct dwarf2_per_cu_data *per_cu; | |
24033 | ||
24034 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
24035 | |
24036 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
24037 | reading of the chain. As such dependencies remain valid it is not much | |
24038 | useful to track and undo them during QUIT cleanups. */ | |
24039 | if (per_cu->cu == NULL) | |
24040 | return 1; | |
24041 | ||
10b3939b DJ |
24042 | if (per_cu->cu->mark) |
24043 | return 1; | |
24044 | per_cu->cu->mark = 1; | |
24045 | ||
24046 | if (per_cu->cu->dependencies != NULL) | |
24047 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
24048 | ||
24049 | return 1; | |
24050 | } | |
24051 | ||
f504f079 DE |
24052 | /* Set the mark field in CU and in every other compilation unit in the |
24053 | cache that we must keep because we are keeping CU. */ | |
24054 | ||
ae038cb0 DJ |
24055 | static void |
24056 | dwarf2_mark (struct dwarf2_cu *cu) | |
24057 | { | |
24058 | if (cu->mark) | |
24059 | return; | |
24060 | cu->mark = 1; | |
10b3939b DJ |
24061 | if (cu->dependencies != NULL) |
24062 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
24063 | } |
24064 | ||
24065 | static void | |
24066 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
24067 | { | |
24068 | while (per_cu) | |
24069 | { | |
24070 | per_cu->cu->mark = 0; | |
24071 | per_cu = per_cu->cu->read_in_chain; | |
24072 | } | |
72bf9492 DJ |
24073 | } |
24074 | ||
72bf9492 DJ |
24075 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
24076 | is its offset in .debug_info for this objfile. */ | |
24077 | ||
24078 | static hashval_t | |
24079 | partial_die_hash (const void *item) | |
24080 | { | |
9a3c8263 SM |
24081 | const struct partial_die_info *part_die |
24082 | = (const struct partial_die_info *) item; | |
9a619af0 | 24083 | |
9c541725 | 24084 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
24085 | } |
24086 | ||
24087 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
24088 | are equal if they have the same offset. */ | |
24089 | ||
24090 | static int | |
24091 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
24092 | { | |
9a3c8263 SM |
24093 | const struct partial_die_info *part_die_lhs |
24094 | = (const struct partial_die_info *) item_lhs; | |
24095 | const struct partial_die_info *part_die_rhs | |
24096 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 24097 | |
9c541725 | 24098 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
24099 | } |
24100 | ||
b4f54984 DE |
24101 | static struct cmd_list_element *set_dwarf_cmdlist; |
24102 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
24103 | |
24104 | static void | |
981a3fb3 | 24105 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 24106 | { |
b4f54984 | 24107 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 24108 | gdb_stdout); |
ae038cb0 DJ |
24109 | } |
24110 | ||
24111 | static void | |
981a3fb3 | 24112 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 24113 | { |
b4f54984 | 24114 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
24115 | } |
24116 | ||
4bf44c1c | 24117 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
24118 | |
24119 | static void | |
c1bd65d0 | 24120 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 24121 | { |
9a3c8263 | 24122 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 24123 | int ix; |
8b70b953 | 24124 | |
626f2d1c TT |
24125 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
24126 | cleaning up. */ | |
24127 | dwarf2_per_objfile = NULL; | |
24128 | ||
59b0c7c1 JB |
24129 | for (ix = 0; ix < data->n_comp_units; ++ix) |
24130 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 24131 | |
59b0c7c1 | 24132 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 24133 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
24134 | data->all_type_units[ix]->per_cu.imported_symtabs); |
24135 | xfree (data->all_type_units); | |
95554aad | 24136 | |
8b70b953 | 24137 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
24138 | |
24139 | if (data->dwo_files) | |
24140 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
24141 | if (data->dwp_file) |
24142 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
24143 | |
24144 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
24145 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
3f563c84 PA |
24146 | |
24147 | if (data->index_table != NULL) | |
24148 | data->index_table->~mapped_index (); | |
9291a0cd TT |
24149 | } |
24150 | ||
24151 | \f | |
ae2de4f8 | 24152 | /* The "save gdb-index" command. */ |
9291a0cd | 24153 | |
bc8f2430 JK |
24154 | /* In-memory buffer to prepare data to be written later to a file. */ |
24155 | class data_buf | |
9291a0cd | 24156 | { |
bc8f2430 | 24157 | public: |
bc8f2430 JK |
24158 | /* Copy DATA to the end of the buffer. */ |
24159 | template<typename T> | |
24160 | void append_data (const T &data) | |
24161 | { | |
24162 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
24163 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 24164 | grow (sizeof (data))); |
bc8f2430 | 24165 | } |
b89be57b | 24166 | |
c2f134ac PA |
24167 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
24168 | terminating zero is appended too. */ | |
bc8f2430 JK |
24169 | void append_cstr0 (const char *cstr) |
24170 | { | |
24171 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
24172 | std::copy (cstr, cstr + size, grow (size)); |
24173 | } | |
24174 | ||
24175 | /* Accept a host-format integer in VAL and append it to the buffer | |
24176 | as a target-format integer which is LEN bytes long. */ | |
24177 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
24178 | { | |
24179 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 24180 | } |
9291a0cd | 24181 | |
bc8f2430 JK |
24182 | /* Return the size of the buffer. */ |
24183 | size_t size () const | |
24184 | { | |
24185 | return m_vec.size (); | |
24186 | } | |
24187 | ||
24188 | /* Write the buffer to FILE. */ | |
24189 | void file_write (FILE *file) const | |
24190 | { | |
a81e6d4d PA |
24191 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
24192 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
24193 | } |
24194 | ||
24195 | private: | |
c2f134ac PA |
24196 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
24197 | the start of the new block. */ | |
24198 | gdb_byte *grow (size_t size) | |
24199 | { | |
24200 | m_vec.resize (m_vec.size () + size); | |
24201 | return &*m_vec.end () - size; | |
24202 | } | |
24203 | ||
d5722aa2 | 24204 | gdb::byte_vector m_vec; |
bc8f2430 | 24205 | }; |
9291a0cd TT |
24206 | |
24207 | /* An entry in the symbol table. */ | |
24208 | struct symtab_index_entry | |
24209 | { | |
24210 | /* The name of the symbol. */ | |
24211 | const char *name; | |
24212 | /* The offset of the name in the constant pool. */ | |
24213 | offset_type index_offset; | |
24214 | /* A sorted vector of the indices of all the CUs that hold an object | |
24215 | of this name. */ | |
bc8f2430 | 24216 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
24217 | }; |
24218 | ||
24219 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
24220 | struct mapped_symtab | |
24221 | { | |
bc8f2430 JK |
24222 | mapped_symtab () |
24223 | { | |
24224 | data.resize (1024); | |
24225 | } | |
b89be57b | 24226 | |
bc8f2430 | 24227 | offset_type n_elements = 0; |
4b76cda9 | 24228 | std::vector<symtab_index_entry> data; |
bc8f2430 | 24229 | }; |
9291a0cd | 24230 | |
bc8f2430 | 24231 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
24232 | the slot. |
24233 | ||
24234 | Function is used only during write_hash_table so no index format backward | |
24235 | compatibility is needed. */ | |
b89be57b | 24236 | |
4b76cda9 | 24237 | static symtab_index_entry & |
9291a0cd TT |
24238 | find_slot (struct mapped_symtab *symtab, const char *name) |
24239 | { | |
559a7a62 | 24240 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 24241 | |
bc8f2430 JK |
24242 | index = hash & (symtab->data.size () - 1); |
24243 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
24244 | |
24245 | for (;;) | |
24246 | { | |
4b76cda9 PA |
24247 | if (symtab->data[index].name == NULL |
24248 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
24249 | return symtab->data[index]; |
24250 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
24251 | } |
24252 | } | |
24253 | ||
24254 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 24255 | |
9291a0cd TT |
24256 | static void |
24257 | hash_expand (struct mapped_symtab *symtab) | |
24258 | { | |
bc8f2430 | 24259 | auto old_entries = std::move (symtab->data); |
9291a0cd | 24260 | |
bc8f2430 JK |
24261 | symtab->data.clear (); |
24262 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 24263 | |
bc8f2430 | 24264 | for (auto &it : old_entries) |
4b76cda9 | 24265 | if (it.name != NULL) |
bc8f2430 | 24266 | { |
4b76cda9 | 24267 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
24268 | ref = std::move (it); |
24269 | } | |
9291a0cd TT |
24270 | } |
24271 | ||
156942c7 DE |
24272 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
24273 | CU_INDEX is the index of the CU in which the symbol appears. | |
24274 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 24275 | |
9291a0cd TT |
24276 | static void |
24277 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 24278 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
24279 | offset_type cu_index) |
24280 | { | |
156942c7 | 24281 | offset_type cu_index_and_attrs; |
9291a0cd TT |
24282 | |
24283 | ++symtab->n_elements; | |
bc8f2430 | 24284 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
24285 | hash_expand (symtab); |
24286 | ||
4b76cda9 PA |
24287 | symtab_index_entry &slot = find_slot (symtab, name); |
24288 | if (slot.name == NULL) | |
9291a0cd | 24289 | { |
4b76cda9 | 24290 | slot.name = name; |
156942c7 | 24291 | /* index_offset is set later. */ |
9291a0cd | 24292 | } |
156942c7 DE |
24293 | |
24294 | cu_index_and_attrs = 0; | |
24295 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
24296 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
24297 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
24298 | ||
24299 | /* We don't want to record an index value twice as we want to avoid the | |
24300 | duplication. | |
24301 | We process all global symbols and then all static symbols | |
24302 | (which would allow us to avoid the duplication by only having to check | |
24303 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
24304 | To keep things simple we don't worry about the duplication here and | |
24305 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 24306 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
24307 | } |
24308 | ||
24309 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
24310 | ||
24311 | static void | |
24312 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
24313 | { | |
4b76cda9 | 24314 | for (auto &entry : symtab->data) |
156942c7 | 24315 | { |
4b76cda9 | 24316 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 24317 | { |
4b76cda9 | 24318 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
24319 | std::sort (cu_indices.begin (), cu_indices.end ()); |
24320 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
24321 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
24322 | } |
24323 | } | |
9291a0cd TT |
24324 | } |
24325 | ||
bc8f2430 JK |
24326 | /* A form of 'const char *' suitable for container keys. Only the |
24327 | pointer is stored. The strings themselves are compared, not the | |
24328 | pointers. */ | |
24329 | class c_str_view | |
9291a0cd | 24330 | { |
bc8f2430 JK |
24331 | public: |
24332 | c_str_view (const char *cstr) | |
24333 | : m_cstr (cstr) | |
24334 | {} | |
9291a0cd | 24335 | |
bc8f2430 JK |
24336 | bool operator== (const c_str_view &other) const |
24337 | { | |
24338 | return strcmp (m_cstr, other.m_cstr) == 0; | |
24339 | } | |
9291a0cd | 24340 | |
bc8f2430 JK |
24341 | private: |
24342 | friend class c_str_view_hasher; | |
24343 | const char *const m_cstr; | |
24344 | }; | |
9291a0cd | 24345 | |
bc8f2430 JK |
24346 | /* A std::unordered_map::hasher for c_str_view that uses the right |
24347 | hash function for strings in a mapped index. */ | |
24348 | class c_str_view_hasher | |
24349 | { | |
24350 | public: | |
24351 | size_t operator () (const c_str_view &x) const | |
24352 | { | |
24353 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
24354 | } | |
24355 | }; | |
b89be57b | 24356 | |
bc8f2430 JK |
24357 | /* A std::unordered_map::hasher for std::vector<>. */ |
24358 | template<typename T> | |
24359 | class vector_hasher | |
9291a0cd | 24360 | { |
bc8f2430 JK |
24361 | public: |
24362 | size_t operator () (const std::vector<T> &key) const | |
24363 | { | |
24364 | return iterative_hash (key.data (), | |
24365 | sizeof (key.front ()) * key.size (), 0); | |
24366 | } | |
24367 | }; | |
9291a0cd | 24368 | |
bc8f2430 JK |
24369 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
24370 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 24371 | |
bc8f2430 JK |
24372 | static void |
24373 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
24374 | { | |
24375 | { | |
24376 | /* Elements are sorted vectors of the indices of all the CUs that | |
24377 | hold an object of this name. */ | |
24378 | std::unordered_map<std::vector<offset_type>, offset_type, | |
24379 | vector_hasher<offset_type>> | |
24380 | symbol_hash_table; | |
24381 | ||
24382 | /* We add all the index vectors to the constant pool first, to | |
24383 | ensure alignment is ok. */ | |
4b76cda9 | 24384 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 24385 | { |
4b76cda9 | 24386 | if (entry.name == NULL) |
bc8f2430 | 24387 | continue; |
4b76cda9 | 24388 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
24389 | |
24390 | /* Finding before inserting is faster than always trying to | |
24391 | insert, because inserting always allocates a node, does the | |
24392 | lookup, and then destroys the new node if another node | |
24393 | already had the same key. C++17 try_emplace will avoid | |
24394 | this. */ | |
24395 | const auto found | |
4b76cda9 | 24396 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
24397 | if (found != symbol_hash_table.end ()) |
24398 | { | |
4b76cda9 | 24399 | entry.index_offset = found->second; |
70a1152b PA |
24400 | continue; |
24401 | } | |
24402 | ||
4b76cda9 PA |
24403 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
24404 | entry.index_offset = cpool.size (); | |
24405 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
24406 | for (const auto index : entry.cu_indices) | |
24407 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
24408 | } |
24409 | } | |
9291a0cd TT |
24410 | |
24411 | /* Now write out the hash table. */ | |
bc8f2430 | 24412 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 24413 | for (const auto &entry : symtab->data) |
9291a0cd TT |
24414 | { |
24415 | offset_type str_off, vec_off; | |
24416 | ||
4b76cda9 | 24417 | if (entry.name != NULL) |
9291a0cd | 24418 | { |
4b76cda9 | 24419 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 24420 | if (insertpair.second) |
4b76cda9 | 24421 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 24422 | str_off = insertpair.first->second; |
4b76cda9 | 24423 | vec_off = entry.index_offset; |
9291a0cd TT |
24424 | } |
24425 | else | |
24426 | { | |
24427 | /* While 0 is a valid constant pool index, it is not valid | |
24428 | to have 0 for both offsets. */ | |
24429 | str_off = 0; | |
24430 | vec_off = 0; | |
24431 | } | |
24432 | ||
bc8f2430 JK |
24433 | output.append_data (MAYBE_SWAP (str_off)); |
24434 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 24435 | } |
9291a0cd TT |
24436 | } |
24437 | ||
bc8f2430 | 24438 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
24439 | |
24440 | /* Helper struct for building the address table. */ | |
24441 | struct addrmap_index_data | |
24442 | { | |
bc8f2430 JK |
24443 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
24444 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
24445 | {} | |
24446 | ||
0a5429f6 | 24447 | struct objfile *objfile; |
bc8f2430 JK |
24448 | data_buf &addr_vec; |
24449 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
24450 | |
24451 | /* Non-zero if the previous_* fields are valid. | |
24452 | We can't write an entry until we see the next entry (since it is only then | |
24453 | that we know the end of the entry). */ | |
24454 | int previous_valid; | |
24455 | /* Index of the CU in the table of all CUs in the index file. */ | |
24456 | unsigned int previous_cu_index; | |
0963b4bd | 24457 | /* Start address of the CU. */ |
0a5429f6 DE |
24458 | CORE_ADDR previous_cu_start; |
24459 | }; | |
24460 | ||
bc8f2430 | 24461 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 24462 | |
9291a0cd | 24463 | static void |
bc8f2430 | 24464 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 24465 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 24466 | { |
9291a0cd TT |
24467 | CORE_ADDR baseaddr; |
24468 | ||
24469 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
24470 | ||
c2f134ac PA |
24471 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
24472 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 24473 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
24474 | } |
24475 | ||
24476 | /* Worker function for traversing an addrmap to build the address table. */ | |
24477 | ||
24478 | static int | |
24479 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
24480 | { | |
9a3c8263 SM |
24481 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
24482 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
24483 | |
24484 | if (data->previous_valid) | |
bc8f2430 | 24485 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
24486 | data->previous_cu_start, start_addr, |
24487 | data->previous_cu_index); | |
24488 | ||
24489 | data->previous_cu_start = start_addr; | |
24490 | if (pst != NULL) | |
24491 | { | |
bc8f2430 JK |
24492 | const auto it = data->cu_index_htab.find (pst); |
24493 | gdb_assert (it != data->cu_index_htab.cend ()); | |
24494 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
24495 | data->previous_valid = 1; |
24496 | } | |
24497 | else | |
bc8f2430 | 24498 | data->previous_valid = 0; |
0a5429f6 DE |
24499 | |
24500 | return 0; | |
24501 | } | |
24502 | ||
bc8f2430 | 24503 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
24504 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
24505 | in the index file. */ | |
24506 | ||
24507 | static void | |
bc8f2430 JK |
24508 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
24509 | psym_index_map &cu_index_htab) | |
0a5429f6 | 24510 | { |
bc8f2430 | 24511 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
24512 | |
24513 | /* When writing the address table, we have to cope with the fact that | |
24514 | the addrmap iterator only provides the start of a region; we have to | |
24515 | wait until the next invocation to get the start of the next region. */ | |
24516 | ||
24517 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
24518 | addrmap_index_data.previous_valid = 0; |
24519 | ||
24520 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
24521 | &addrmap_index_data); | |
24522 | ||
24523 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
24524 | is valid, but we should still handle it. | |
24525 | The end address is recorded as the start of the next region, but that | |
24526 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
24527 | anyway. */ | |
24528 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 24529 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
24530 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
24531 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
24532 | } |
24533 | ||
156942c7 DE |
24534 | /* Return the symbol kind of PSYM. */ |
24535 | ||
24536 | static gdb_index_symbol_kind | |
24537 | symbol_kind (struct partial_symbol *psym) | |
24538 | { | |
24539 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
24540 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
24541 | ||
24542 | switch (domain) | |
24543 | { | |
24544 | case VAR_DOMAIN: | |
24545 | switch (aclass) | |
24546 | { | |
24547 | case LOC_BLOCK: | |
24548 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
24549 | case LOC_TYPEDEF: | |
24550 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24551 | case LOC_COMPUTED: | |
24552 | case LOC_CONST_BYTES: | |
24553 | case LOC_OPTIMIZED_OUT: | |
24554 | case LOC_STATIC: | |
24555 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24556 | case LOC_CONST: | |
24557 | /* Note: It's currently impossible to recognize psyms as enum values | |
24558 | short of reading the type info. For now punt. */ | |
24559 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24560 | default: | |
24561 | /* There are other LOC_FOO values that one might want to classify | |
24562 | as variables, but dwarf2read.c doesn't currently use them. */ | |
24563 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24564 | } | |
24565 | case STRUCT_DOMAIN: | |
24566 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24567 | default: | |
24568 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24569 | } | |
24570 | } | |
24571 | ||
9291a0cd | 24572 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 24573 | |
9291a0cd TT |
24574 | static void |
24575 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 24576 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
24577 | struct partial_symbol **psymp, |
24578 | int count, | |
987d643c TT |
24579 | offset_type cu_index, |
24580 | int is_static) | |
9291a0cd TT |
24581 | { |
24582 | for (; count-- > 0; ++psymp) | |
24583 | { | |
156942c7 | 24584 | struct partial_symbol *psym = *psymp; |
987d643c | 24585 | |
156942c7 | 24586 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 24587 | error (_("Ada is not currently supported by the index")); |
987d643c | 24588 | |
987d643c | 24589 | /* Only add a given psymbol once. */ |
bc8f2430 | 24590 | if (psyms_seen.insert (psym).second) |
987d643c | 24591 | { |
156942c7 DE |
24592 | gdb_index_symbol_kind kind = symbol_kind (psym); |
24593 | ||
156942c7 DE |
24594 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
24595 | is_static, kind, cu_index); | |
987d643c | 24596 | } |
9291a0cd TT |
24597 | } |
24598 | } | |
24599 | ||
1fd400ff TT |
24600 | /* A helper struct used when iterating over debug_types. */ |
24601 | struct signatured_type_index_data | |
24602 | { | |
bc8f2430 JK |
24603 | signatured_type_index_data (data_buf &types_list_, |
24604 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
24605 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
24606 | {} | |
24607 | ||
1fd400ff TT |
24608 | struct objfile *objfile; |
24609 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
24610 | data_buf &types_list; |
24611 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
24612 | int cu_index; |
24613 | }; | |
24614 | ||
24615 | /* A helper function that writes a single signatured_type to an | |
24616 | obstack. */ | |
b89be57b | 24617 | |
1fd400ff TT |
24618 | static int |
24619 | write_one_signatured_type (void **slot, void *d) | |
24620 | { | |
9a3c8263 SM |
24621 | struct signatured_type_index_data *info |
24622 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 24623 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 24624 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
24625 | |
24626 | write_psymbols (info->symtab, | |
987d643c | 24627 | info->psyms_seen, |
af5bf4ad | 24628 | &info->objfile->global_psymbols[psymtab->globals_offset], |
987d643c TT |
24629 | psymtab->n_global_syms, info->cu_index, |
24630 | 0); | |
1fd400ff | 24631 | write_psymbols (info->symtab, |
987d643c | 24632 | info->psyms_seen, |
af5bf4ad | 24633 | &info->objfile->static_psymbols[psymtab->statics_offset], |
987d643c TT |
24634 | psymtab->n_static_syms, info->cu_index, |
24635 | 1); | |
1fd400ff | 24636 | |
c2f134ac PA |
24637 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24638 | to_underlying (entry->per_cu.sect_off)); | |
24639 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
24640 | to_underlying (entry->type_offset_in_tu)); | |
24641 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
24642 | |
24643 | ++info->cu_index; | |
24644 | ||
24645 | return 1; | |
24646 | } | |
24647 | ||
e8f8bcb3 PA |
24648 | /* Recurse into all "included" dependencies and count their symbols as |
24649 | if they appeared in this psymtab. */ | |
24650 | ||
24651 | static void | |
24652 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
24653 | size_t &psyms_seen) | |
24654 | { | |
24655 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
24656 | if (psymtab->dependencies[i]->user != NULL) | |
24657 | recursively_count_psymbols (psymtab->dependencies[i], | |
24658 | psyms_seen); | |
24659 | ||
24660 | psyms_seen += psymtab->n_global_syms; | |
24661 | psyms_seen += psymtab->n_static_syms; | |
24662 | } | |
24663 | ||
95554aad TT |
24664 | /* Recurse into all "included" dependencies and write their symbols as |
24665 | if they appeared in this psymtab. */ | |
24666 | ||
24667 | static void | |
24668 | recursively_write_psymbols (struct objfile *objfile, | |
24669 | struct partial_symtab *psymtab, | |
24670 | struct mapped_symtab *symtab, | |
bc8f2430 | 24671 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
24672 | offset_type cu_index) |
24673 | { | |
24674 | int i; | |
24675 | ||
24676 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
24677 | if (psymtab->dependencies[i]->user != NULL) | |
24678 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
24679 | symtab, psyms_seen, cu_index); | |
24680 | ||
24681 | write_psymbols (symtab, | |
24682 | psyms_seen, | |
af5bf4ad | 24683 | &objfile->global_psymbols[psymtab->globals_offset], |
95554aad TT |
24684 | psymtab->n_global_syms, cu_index, |
24685 | 0); | |
24686 | write_psymbols (symtab, | |
24687 | psyms_seen, | |
af5bf4ad | 24688 | &objfile->static_psymbols[psymtab->statics_offset], |
95554aad TT |
24689 | psymtab->n_static_syms, cu_index, |
24690 | 1); | |
24691 | } | |
24692 | ||
9291a0cd | 24693 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 24694 | |
9291a0cd TT |
24695 | static void |
24696 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
24697 | { | |
9291a0cd TT |
24698 | if (dwarf2_per_objfile->using_index) |
24699 | error (_("Cannot use an index to create the index")); | |
24700 | ||
8b70b953 TT |
24701 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
24702 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
24703 | ||
260b681b DE |
24704 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
24705 | return; | |
24706 | ||
bc8f2430 | 24707 | struct stat st; |
4262abfb JK |
24708 | if (stat (objfile_name (objfile), &st) < 0) |
24709 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 24710 | |
bc8f2430 JK |
24711 | std::string filename (std::string (dir) + SLASH_STRING |
24712 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 24713 | |
d419f42d | 24714 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 24715 | if (!out_file) |
bc8f2430 | 24716 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 24717 | |
16b7a719 PA |
24718 | /* Order matters here; we want FILE to be closed before FILENAME is |
24719 | unlinked, because on MS-Windows one cannot delete a file that is | |
24720 | still open. (Don't call anything here that might throw until | |
24721 | file_closer is created.) */ | |
bc8f2430 | 24722 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 24723 | gdb_file_up close_out_file (out_file); |
9291a0cd | 24724 | |
bc8f2430 JK |
24725 | mapped_symtab symtab; |
24726 | data_buf cu_list; | |
987d643c | 24727 | |
0a5429f6 DE |
24728 | /* While we're scanning CU's create a table that maps a psymtab pointer |
24729 | (which is what addrmap records) to its index (which is what is recorded | |
24730 | in the index file). This will later be needed to write the address | |
24731 | table. */ | |
bc8f2430 JK |
24732 | psym_index_map cu_index_htab; |
24733 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
24734 | |
24735 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
24736 | work here. Also, the debug_types entries do not appear in |
24737 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
24738 | |
24739 | /* The psyms_seen set is potentially going to be largish (~40k | |
24740 | elements when indexing a -g3 build of GDB itself). Estimate the | |
24741 | number of elements in order to avoid too many rehashes, which | |
24742 | require rebuilding buckets and thus many trips to | |
24743 | malloc/free. */ | |
24744 | size_t psyms_count = 0; | |
24745 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24746 | { | |
24747 | struct dwarf2_per_cu_data *per_cu | |
24748 | = dwarf2_per_objfile->all_comp_units[i]; | |
24749 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
24750 | ||
24751 | if (psymtab != NULL && psymtab->user == NULL) | |
24752 | recursively_count_psymbols (psymtab, psyms_count); | |
24753 | } | |
24754 | /* Generating an index for gdb itself shows a ratio of | |
24755 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
24756 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 24757 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 24758 | { |
3e43a32a MS |
24759 | struct dwarf2_per_cu_data *per_cu |
24760 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 24761 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 24762 | |
92fac807 JK |
24763 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
24764 | It may be referenced from a local scope but in such case it does not | |
24765 | need to be present in .gdb_index. */ | |
24766 | if (psymtab == NULL) | |
24767 | continue; | |
24768 | ||
95554aad | 24769 | if (psymtab->user == NULL) |
bc8f2430 JK |
24770 | recursively_write_psymbols (objfile, psymtab, &symtab, |
24771 | psyms_seen, i); | |
9291a0cd | 24772 | |
bc8f2430 JK |
24773 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
24774 | gdb_assert (insertpair.second); | |
9291a0cd | 24775 | |
c2f134ac PA |
24776 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24777 | to_underlying (per_cu->sect_off)); | |
24778 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
24779 | } |
24780 | ||
0a5429f6 | 24781 | /* Dump the address map. */ |
bc8f2430 JK |
24782 | data_buf addr_vec; |
24783 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 24784 | |
1fd400ff | 24785 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 24786 | data_buf types_cu_list; |
1fd400ff TT |
24787 | if (dwarf2_per_objfile->signatured_types) |
24788 | { | |
bc8f2430 JK |
24789 | signatured_type_index_data sig_data (types_cu_list, |
24790 | psyms_seen); | |
1fd400ff TT |
24791 | |
24792 | sig_data.objfile = objfile; | |
bc8f2430 | 24793 | sig_data.symtab = &symtab; |
1fd400ff TT |
24794 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
24795 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
24796 | write_one_signatured_type, &sig_data); | |
24797 | } | |
24798 | ||
156942c7 DE |
24799 | /* Now that we've processed all symbols we can shrink their cu_indices |
24800 | lists. */ | |
bc8f2430 | 24801 | uniquify_cu_indices (&symtab); |
156942c7 | 24802 | |
bc8f2430 JK |
24803 | data_buf symtab_vec, constant_pool; |
24804 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 24805 | |
bc8f2430 JK |
24806 | data_buf contents; |
24807 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
24808 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
24809 | |
24810 | /* The version number. */ | |
bc8f2430 | 24811 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
24812 | |
24813 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
24814 | contents.append_data (MAYBE_SWAP (total_len)); |
24815 | total_len += cu_list.size (); | |
9291a0cd | 24816 | |
1fd400ff | 24817 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
24818 | contents.append_data (MAYBE_SWAP (total_len)); |
24819 | total_len += types_cu_list.size (); | |
1fd400ff | 24820 | |
9291a0cd | 24821 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
24822 | contents.append_data (MAYBE_SWAP (total_len)); |
24823 | total_len += addr_vec.size (); | |
9291a0cd TT |
24824 | |
24825 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
24826 | contents.append_data (MAYBE_SWAP (total_len)); |
24827 | total_len += symtab_vec.size (); | |
9291a0cd TT |
24828 | |
24829 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
24830 | contents.append_data (MAYBE_SWAP (total_len)); |
24831 | total_len += constant_pool.size (); | |
9291a0cd | 24832 | |
bc8f2430 | 24833 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 24834 | |
bc8f2430 JK |
24835 | contents.file_write (out_file); |
24836 | cu_list.file_write (out_file); | |
24837 | types_cu_list.file_write (out_file); | |
24838 | addr_vec.file_write (out_file); | |
24839 | symtab_vec.file_write (out_file); | |
24840 | constant_pool.file_write (out_file); | |
9291a0cd | 24841 | |
bef155c3 TT |
24842 | /* We want to keep the file. */ |
24843 | unlink_file.keep (); | |
9291a0cd TT |
24844 | } |
24845 | ||
90476074 TT |
24846 | /* Implementation of the `save gdb-index' command. |
24847 | ||
24848 | Note that the file format used by this command is documented in the | |
24849 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 24850 | |
9291a0cd | 24851 | static void |
8384c356 | 24852 | save_gdb_index_command (const char *arg, int from_tty) |
9291a0cd TT |
24853 | { |
24854 | struct objfile *objfile; | |
24855 | ||
24856 | if (!arg || !*arg) | |
96d19272 | 24857 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
24858 | |
24859 | ALL_OBJFILES (objfile) | |
24860 | { | |
24861 | struct stat st; | |
24862 | ||
24863 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 24864 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
24865 | continue; |
24866 | ||
9a3c8263 SM |
24867 | dwarf2_per_objfile |
24868 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
24869 | dwarf2_objfile_data_key); | |
9291a0cd TT |
24870 | if (dwarf2_per_objfile) |
24871 | { | |
9291a0cd | 24872 | |
492d29ea | 24873 | TRY |
9291a0cd TT |
24874 | { |
24875 | write_psymtabs_to_index (objfile, arg); | |
24876 | } | |
492d29ea PA |
24877 | CATCH (except, RETURN_MASK_ERROR) |
24878 | { | |
24879 | exception_fprintf (gdb_stderr, except, | |
24880 | _("Error while writing index for `%s': "), | |
24881 | objfile_name (objfile)); | |
24882 | } | |
24883 | END_CATCH | |
9291a0cd TT |
24884 | } |
24885 | } | |
dce234bc PP |
24886 | } |
24887 | ||
9291a0cd TT |
24888 | \f |
24889 | ||
b4f54984 | 24890 | int dwarf_always_disassemble; |
9eae7c52 TT |
24891 | |
24892 | static void | |
b4f54984 DE |
24893 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24894 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24895 | { |
3e43a32a MS |
24896 | fprintf_filtered (file, |
24897 | _("Whether to always disassemble " | |
24898 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24899 | value); |
24900 | } | |
24901 | ||
900e11f9 JK |
24902 | static void |
24903 | show_check_physname (struct ui_file *file, int from_tty, | |
24904 | struct cmd_list_element *c, const char *value) | |
24905 | { | |
24906 | fprintf_filtered (file, | |
24907 | _("Whether to check \"physname\" is %s.\n"), | |
24908 | value); | |
24909 | } | |
24910 | ||
6502dd73 DJ |
24911 | void |
24912 | _initialize_dwarf2_read (void) | |
24913 | { | |
96d19272 JK |
24914 | struct cmd_list_element *c; |
24915 | ||
dce234bc | 24916 | dwarf2_objfile_data_key |
c1bd65d0 | 24917 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24918 | |
b4f54984 DE |
24919 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24920 | Set DWARF specific variables.\n\ | |
24921 | Configure DWARF variables such as the cache size"), | |
24922 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24923 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24924 | ||
b4f54984 DE |
24925 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24926 | Show DWARF specific variables\n\ | |
24927 | Show DWARF variables such as the cache size"), | |
24928 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24929 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24930 | ||
24931 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24932 | &dwarf_max_cache_age, _("\ |
24933 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24934 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24935 | A higher limit means that cached compilation units will be stored\n\ |
24936 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24937 | caching, which can slow down startup."), | |
2c5b56ce | 24938 | NULL, |
b4f54984 DE |
24939 | show_dwarf_max_cache_age, |
24940 | &set_dwarf_cmdlist, | |
24941 | &show_dwarf_cmdlist); | |
d97bc12b | 24942 | |
9eae7c52 | 24943 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24944 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24945 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24946 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24947 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24948 | syntax. When disabled, expressions will be printed in a more\n\ | |
24949 | conversational style, when possible."), | |
24950 | NULL, | |
b4f54984 DE |
24951 | show_dwarf_always_disassemble, |
24952 | &set_dwarf_cmdlist, | |
24953 | &show_dwarf_cmdlist); | |
24954 | ||
24955 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
24956 | Set debugging of the DWARF reader."), _("\ | |
24957 | Show debugging of the DWARF reader."), _("\ | |
24958 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
24959 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
24960 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
24961 | NULL, |
24962 | NULL, | |
24963 | &setdebuglist, &showdebuglist); | |
24964 | ||
b4f54984 DE |
24965 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24966 | Set debugging of the DWARF DIE reader."), _("\ | |
24967 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
24968 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
24969 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
24970 | NULL, |
24971 | NULL, | |
24972 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24973 | |
27e0867f DE |
24974 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24975 | Set debugging of the dwarf line reader."), _("\ | |
24976 | Show debugging of the dwarf line reader."), _("\ | |
24977 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24978 | A value of 1 (one) provides basic information.\n\ | |
24979 | A value greater than 1 provides more verbose information."), | |
24980 | NULL, | |
24981 | NULL, | |
24982 | &setdebuglist, &showdebuglist); | |
24983 | ||
900e11f9 JK |
24984 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24985 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24986 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24987 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24988 | the demangler."), | |
24989 | NULL, show_check_physname, | |
24990 | &setdebuglist, &showdebuglist); | |
24991 | ||
e615022a DE |
24992 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24993 | no_class, &use_deprecated_index_sections, _("\ | |
24994 | Set whether to use deprecated gdb_index sections."), _("\ | |
24995 | Show whether to use deprecated gdb_index sections."), _("\ | |
24996 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24997 | Normally they are ignored either because of a missing feature or\n\ | |
24998 | performance issue.\n\ | |
24999 | Warning: This option must be enabled before gdb reads the file."), | |
25000 | NULL, | |
25001 | NULL, | |
25002 | &setlist, &showlist); | |
25003 | ||
96d19272 | 25004 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 25005 | _("\ |
fc1a9d6e | 25006 | Save a gdb-index file.\n\ |
11570e71 | 25007 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
25008 | &save_cmdlist); |
25009 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
25010 | |
25011 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25012 | &dwarf2_locexpr_funcs); | |
25013 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25014 | &dwarf2_loclist_funcs); | |
25015 | ||
25016 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25017 | &dwarf2_block_frame_base_locexpr_funcs); | |
25018 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25019 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
25020 | |
25021 | #if GDB_SELF_TEST | |
25022 | selftests::register_test ("dw2_expand_symtabs_matching", | |
25023 | selftests::dw2_expand_symtabs_matching::run_test); | |
25024 | #endif | |
6502dd73 | 25025 | } |