Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
61baf725 | 3 | Copyright (C) 1994-2017 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 | 55 | #include "typeprint.h" |
ccefe4c4 | 56 | #include "psympriv.h" |
53ce3c39 | 57 | #include <sys/stat.h> |
96d19272 | 58 | #include "completer.h" |
34eaf542 | 59 | #include "vec.h" |
98bfdba5 | 60 | #include "c-lang.h" |
a766d390 | 61 | #include "go-lang.h" |
98bfdba5 | 62 | #include "valprint.h" |
3019eac3 | 63 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 64 | #include "gdb/gdb-index.h" |
60d5a603 | 65 | #include <ctype.h> |
cbb099e8 | 66 | #include "gdb_bfd.h" |
4357ac6c | 67 | #include "f-lang.h" |
05cba821 | 68 | #include "source.h" |
614c279d | 69 | #include "filestuff.h" |
dc294be5 | 70 | #include "build-id.h" |
22cee43f | 71 | #include "namespace.h" |
bef155c3 | 72 | #include "common/gdb_unlinker.h" |
14bc53a8 | 73 | #include "common/function-view.h" |
ecfb656c PA |
74 | #include "common/gdb_optional.h" |
75 | #include "common/underlying.h" | |
d5722aa2 | 76 | #include "common/byte-vector.h" |
bbf2f4df | 77 | #include "filename-seen-cache.h" |
b32b108a | 78 | #include "producer.h" |
c906108c | 79 | #include <fcntl.h> |
c906108c | 80 | #include <sys/types.h> |
325fac50 | 81 | #include <algorithm> |
bc8f2430 JK |
82 | #include <unordered_set> |
83 | #include <unordered_map> | |
c62446b1 | 84 | #include "selftest.h" |
d8151005 | 85 | |
73be47f5 DE |
86 | /* When == 1, print basic high level tracing messages. |
87 | When > 1, be more verbose. | |
b4f54984 DE |
88 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
89 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 90 | |
d97bc12b | 91 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 92 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 93 | |
27e0867f DE |
94 | /* When non-zero, dump line number entries as they are read in. */ |
95 | static unsigned int dwarf_line_debug = 0; | |
96 | ||
900e11f9 JK |
97 | /* When non-zero, cross-check physname against demangler. */ |
98 | static int check_physname = 0; | |
99 | ||
481860b3 | 100 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 101 | static int use_deprecated_index_sections = 0; |
481860b3 | 102 | |
6502dd73 DJ |
103 | static const struct objfile_data *dwarf2_objfile_data_key; |
104 | ||
f1e6e072 TT |
105 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
106 | ||
107 | static int dwarf2_locexpr_index; | |
108 | static int dwarf2_loclist_index; | |
109 | static int dwarf2_locexpr_block_index; | |
110 | static int dwarf2_loclist_block_index; | |
111 | ||
73869dc2 DE |
112 | /* A descriptor for dwarf sections. |
113 | ||
114 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
115 | scanned. BUFFER, READIN are filled in later when the section is read. | |
116 | If the section contained compressed data then SIZE is updated to record | |
117 | the uncompressed size of the section. | |
118 | ||
119 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
120 | creating the concept of virtual sections contained within a real section. | |
121 | In DWP V2 the sections of the input DWO files are concatenated together | |
122 | into one section, but section offsets are kept relative to the original | |
123 | input section. | |
124 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
125 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
126 | describe the virtual section. */ | |
127 | ||
dce234bc PP |
128 | struct dwarf2_section_info |
129 | { | |
73869dc2 DE |
130 | union |
131 | { | |
e5aa3347 | 132 | /* If this is a real section, the bfd section. */ |
049412e3 | 133 | asection *section; |
73869dc2 | 134 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 135 | section. */ |
73869dc2 DE |
136 | struct dwarf2_section_info *containing_section; |
137 | } s; | |
19ac8c2e | 138 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 139 | const gdb_byte *buffer; |
73869dc2 | 140 | /* The size of the section, real or virtual. */ |
dce234bc | 141 | bfd_size_type size; |
73869dc2 DE |
142 | /* If this is a virtual section, the offset in the real section. |
143 | Only valid if is_virtual. */ | |
144 | bfd_size_type virtual_offset; | |
be391dca | 145 | /* True if we have tried to read this section. */ |
73869dc2 DE |
146 | char readin; |
147 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 148 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 149 | char is_virtual; |
dce234bc PP |
150 | }; |
151 | ||
8b70b953 TT |
152 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
153 | DEF_VEC_O (dwarf2_section_info_def); | |
154 | ||
9291a0cd TT |
155 | /* All offsets in the index are of this type. It must be |
156 | architecture-independent. */ | |
157 | typedef uint32_t offset_type; | |
158 | ||
159 | DEF_VEC_I (offset_type); | |
160 | ||
156942c7 DE |
161 | /* Ensure only legit values are used. */ |
162 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
163 | do { \ | |
164 | gdb_assert ((unsigned int) (value) <= 1); \ | |
165 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
166 | } while (0) | |
167 | ||
168 | /* Ensure only legit values are used. */ | |
169 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
170 | do { \ | |
171 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
172 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
173 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
174 | } while (0) | |
175 | ||
176 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
177 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
178 | do { \ | |
179 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
180 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
181 | } while (0) | |
182 | ||
3f563c84 PA |
183 | #if WORDS_BIGENDIAN |
184 | ||
185 | /* Convert VALUE between big- and little-endian. */ | |
186 | ||
187 | static offset_type | |
188 | byte_swap (offset_type value) | |
189 | { | |
190 | offset_type result; | |
191 | ||
192 | result = (value & 0xff) << 24; | |
193 | result |= (value & 0xff00) << 8; | |
194 | result |= (value & 0xff0000) >> 8; | |
195 | result |= (value & 0xff000000) >> 24; | |
196 | return result; | |
197 | } | |
198 | ||
199 | #define MAYBE_SWAP(V) byte_swap (V) | |
200 | ||
201 | #else | |
202 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) | |
203 | #endif /* WORDS_BIGENDIAN */ | |
204 | ||
205 | /* An index into a (C++) symbol name component in a symbol name as | |
206 | recorded in the mapped_index's symbol table. For each C++ symbol | |
207 | in the symbol table, we record one entry for the start of each | |
208 | component in the symbol in a table of name components, and then | |
209 | sort the table, in order to be able to binary search symbol names, | |
210 | ignoring leading namespaces, both completion and regular look up. | |
211 | For example, for symbol "A::B::C", we'll have an entry that points | |
212 | to "A::B::C", another that points to "B::C", and another for "C". | |
213 | Note that function symbols in GDB index have no parameter | |
214 | information, just the function/method names. You can convert a | |
215 | name_component to a "const char *" using the | |
216 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
217 | ||
218 | struct name_component | |
219 | { | |
220 | /* Offset in the symbol name where the component starts. Stored as | |
221 | a (32-bit) offset instead of a pointer to save memory and improve | |
222 | locality on 64-bit architectures. */ | |
223 | offset_type name_offset; | |
224 | ||
225 | /* The symbol's index in the symbol and constant pool tables of a | |
226 | mapped_index. */ | |
227 | offset_type idx; | |
228 | }; | |
229 | ||
9291a0cd TT |
230 | /* A description of the mapped index. The file format is described in |
231 | a comment by the code that writes the index. */ | |
232 | struct mapped_index | |
233 | { | |
559a7a62 JK |
234 | /* Index data format version. */ |
235 | int version; | |
236 | ||
9291a0cd TT |
237 | /* The total length of the buffer. */ |
238 | off_t total_size; | |
b11b1f88 | 239 | |
9291a0cd TT |
240 | /* A pointer to the address table data. */ |
241 | const gdb_byte *address_table; | |
b11b1f88 | 242 | |
9291a0cd TT |
243 | /* Size of the address table data in bytes. */ |
244 | offset_type address_table_size; | |
b11b1f88 | 245 | |
3876f04e DE |
246 | /* The symbol table, implemented as a hash table. */ |
247 | const offset_type *symbol_table; | |
b11b1f88 | 248 | |
9291a0cd | 249 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 250 | offset_type symbol_table_slots; |
b11b1f88 | 251 | |
9291a0cd TT |
252 | /* A pointer to the constant pool. */ |
253 | const char *constant_pool; | |
3f563c84 PA |
254 | |
255 | /* The name_component table (a sorted vector). See name_component's | |
256 | description above. */ | |
257 | std::vector<name_component> name_components; | |
258 | ||
5c58de74 PA |
259 | /* How NAME_COMPONENTS is sorted. */ |
260 | enum case_sensitivity name_components_casing; | |
261 | ||
3f563c84 PA |
262 | /* Convenience method to get at the name of the symbol at IDX in the |
263 | symbol table. */ | |
264 | const char *symbol_name_at (offset_type idx) const | |
265 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx]); } | |
5c58de74 PA |
266 | |
267 | /* Build the symbol name component sorted vector, if we haven't | |
268 | yet. */ | |
269 | void build_name_components (); | |
270 | ||
271 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
272 | possible matches for LN_NO_PARAMS in the name component | |
273 | vector. */ | |
274 | std::pair<std::vector<name_component>::const_iterator, | |
275 | std::vector<name_component>::const_iterator> | |
276 | find_name_components_bounds (const lookup_name_info &ln_no_params) const; | |
9291a0cd TT |
277 | }; |
278 | ||
95554aad TT |
279 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
280 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
281 | ||
52059ffd TT |
282 | struct tu_stats |
283 | { | |
284 | int nr_uniq_abbrev_tables; | |
285 | int nr_symtabs; | |
286 | int nr_symtab_sharers; | |
287 | int nr_stmt_less_type_units; | |
288 | int nr_all_type_units_reallocs; | |
289 | }; | |
290 | ||
9cdd5dbd DE |
291 | /* Collection of data recorded per objfile. |
292 | This hangs off of dwarf2_objfile_data_key. */ | |
293 | ||
6502dd73 DJ |
294 | struct dwarf2_per_objfile |
295 | { | |
330cdd98 PA |
296 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
297 | dwarf2 section names, or is NULL if the standard ELF names are | |
298 | used. */ | |
299 | dwarf2_per_objfile (struct objfile *objfile, | |
300 | const dwarf2_debug_sections *names); | |
ae038cb0 | 301 | |
330cdd98 PA |
302 | ~dwarf2_per_objfile (); |
303 | ||
d6541620 | 304 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
305 | |
306 | /* Free all cached compilation units. */ | |
307 | void free_cached_comp_units (); | |
308 | private: | |
309 | /* This function is mapped across the sections and remembers the | |
310 | offset and size of each of the debugging sections we are | |
311 | interested in. */ | |
312 | void locate_sections (bfd *abfd, asection *sectp, | |
313 | const dwarf2_debug_sections &names); | |
314 | ||
315 | public: | |
316 | dwarf2_section_info info {}; | |
317 | dwarf2_section_info abbrev {}; | |
318 | dwarf2_section_info line {}; | |
319 | dwarf2_section_info loc {}; | |
320 | dwarf2_section_info loclists {}; | |
321 | dwarf2_section_info macinfo {}; | |
322 | dwarf2_section_info macro {}; | |
323 | dwarf2_section_info str {}; | |
324 | dwarf2_section_info line_str {}; | |
325 | dwarf2_section_info ranges {}; | |
326 | dwarf2_section_info rnglists {}; | |
327 | dwarf2_section_info addr {}; | |
328 | dwarf2_section_info frame {}; | |
329 | dwarf2_section_info eh_frame {}; | |
330 | dwarf2_section_info gdb_index {}; | |
331 | ||
332 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 333 | |
be391dca | 334 | /* Back link. */ |
330cdd98 | 335 | struct objfile *objfile = NULL; |
be391dca | 336 | |
d467dd73 | 337 | /* Table of all the compilation units. This is used to locate |
10b3939b | 338 | the target compilation unit of a particular reference. */ |
330cdd98 | 339 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
340 | |
341 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 342 | int n_comp_units = 0; |
ae038cb0 | 343 | |
1fd400ff | 344 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 345 | int n_type_units = 0; |
1fd400ff | 346 | |
6aa5f3a6 DE |
347 | /* The number of elements allocated in all_type_units. |
348 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 349 | int n_allocated_type_units = 0; |
6aa5f3a6 | 350 | |
a2ce51a0 DE |
351 | /* The .debug_types-related CUs (TUs). |
352 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 353 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 354 | |
f4dc4d17 DE |
355 | /* Table of struct type_unit_group objects. |
356 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 357 | htab_t type_unit_groups {}; |
72dca2f5 | 358 | |
348e048f DE |
359 | /* A table mapping .debug_types signatures to its signatured_type entry. |
360 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 361 | htab_t signatured_types {}; |
348e048f | 362 | |
f4dc4d17 DE |
363 | /* Type unit statistics, to see how well the scaling improvements |
364 | are doing. */ | |
330cdd98 | 365 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
366 | |
367 | /* A chain of compilation units that are currently read in, so that | |
368 | they can be freed later. */ | |
330cdd98 | 369 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 370 | |
3019eac3 DE |
371 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
372 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 373 | htab_t dwo_files {}; |
3019eac3 | 374 | |
330cdd98 PA |
375 | /* True if we've checked for whether there is a DWP file. */ |
376 | bool dwp_checked = false; | |
80626a55 DE |
377 | |
378 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 379 | struct dwp_file *dwp_file = NULL; |
80626a55 | 380 | |
36586728 TT |
381 | /* The shared '.dwz' file, if one exists. This is used when the |
382 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 383 | struct dwz_file *dwz_file = NULL; |
36586728 | 384 | |
330cdd98 | 385 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 386 | VMA of 0. */ |
330cdd98 | 387 | bool has_section_at_zero = false; |
9291a0cd | 388 | |
ae2de4f8 DE |
389 | /* True if we are using the mapped index, |
390 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 391 | bool using_index = false; |
9291a0cd | 392 | |
ae2de4f8 | 393 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 394 | mapped_index *index_table = NULL; |
98bfdba5 | 395 | |
7b9f3c50 | 396 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
397 | TUs typically share line table entries with a CU, so we maintain a |
398 | separate table of all line table entries to support the sharing. | |
399 | Note that while there can be way more TUs than CUs, we've already | |
400 | sorted all the TUs into "type unit groups", grouped by their | |
401 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
402 | CU and its associated TU group if there is one. */ | |
330cdd98 | 403 | htab_t quick_file_names_table {}; |
7b9f3c50 | 404 | |
98bfdba5 PA |
405 | /* Set during partial symbol reading, to prevent queueing of full |
406 | symbols. */ | |
330cdd98 | 407 | bool reading_partial_symbols = false; |
673bfd45 | 408 | |
dee91e82 | 409 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 410 | This is NULL if not allocated yet. |
02142a6c | 411 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 412 | htab_t die_type_hash {}; |
95554aad TT |
413 | |
414 | /* The CUs we recently read. */ | |
330cdd98 | 415 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
416 | |
417 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 418 | htab_t line_header_hash {}; |
bbf2f4df PA |
419 | |
420 | /* Table containing all filenames. This is an optional because the | |
421 | table is lazily constructed on first access. */ | |
422 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
423 | }; |
424 | ||
425 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 426 | |
251d32d9 | 427 | /* Default names of the debugging sections. */ |
c906108c | 428 | |
233a11ab CS |
429 | /* Note that if the debugging section has been compressed, it might |
430 | have a name like .zdebug_info. */ | |
431 | ||
9cdd5dbd DE |
432 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
433 | { | |
251d32d9 TG |
434 | { ".debug_info", ".zdebug_info" }, |
435 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
436 | { ".debug_line", ".zdebug_line" }, | |
437 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 438 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 439 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 440 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 441 | { ".debug_str", ".zdebug_str" }, |
43988095 | 442 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 443 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 444 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 445 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 446 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
447 | { ".debug_frame", ".zdebug_frame" }, |
448 | { ".eh_frame", NULL }, | |
24d3216f TT |
449 | { ".gdb_index", ".zgdb_index" }, |
450 | 23 | |
251d32d9 | 451 | }; |
c906108c | 452 | |
80626a55 | 453 | /* List of DWO/DWP sections. */ |
3019eac3 | 454 | |
80626a55 | 455 | static const struct dwop_section_names |
3019eac3 DE |
456 | { |
457 | struct dwarf2_section_names abbrev_dwo; | |
458 | struct dwarf2_section_names info_dwo; | |
459 | struct dwarf2_section_names line_dwo; | |
460 | struct dwarf2_section_names loc_dwo; | |
43988095 | 461 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
462 | struct dwarf2_section_names macinfo_dwo; |
463 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
464 | struct dwarf2_section_names str_dwo; |
465 | struct dwarf2_section_names str_offsets_dwo; | |
466 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
467 | struct dwarf2_section_names cu_index; |
468 | struct dwarf2_section_names tu_index; | |
3019eac3 | 469 | } |
80626a55 | 470 | dwop_section_names = |
3019eac3 DE |
471 | { |
472 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
473 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
474 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
475 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 476 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
477 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
478 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
479 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
480 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
481 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
482 | { ".debug_cu_index", ".zdebug_cu_index" }, |
483 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
484 | }; |
485 | ||
c906108c SS |
486 | /* local data types */ |
487 | ||
107d2387 AC |
488 | /* The data in a compilation unit header, after target2host |
489 | translation, looks like this. */ | |
c906108c | 490 | struct comp_unit_head |
a738430d | 491 | { |
c764a876 | 492 | unsigned int length; |
a738430d | 493 | short version; |
a738430d MK |
494 | unsigned char addr_size; |
495 | unsigned char signed_addr_p; | |
9c541725 | 496 | sect_offset abbrev_sect_off; |
57349743 | 497 | |
a738430d MK |
498 | /* Size of file offsets; either 4 or 8. */ |
499 | unsigned int offset_size; | |
57349743 | 500 | |
a738430d MK |
501 | /* Size of the length field; either 4 or 12. */ |
502 | unsigned int initial_length_size; | |
57349743 | 503 | |
43988095 JK |
504 | enum dwarf_unit_type unit_type; |
505 | ||
a738430d MK |
506 | /* Offset to the first byte of this compilation unit header in the |
507 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 508 | sect_offset sect_off; |
57349743 | 509 | |
d00adf39 DE |
510 | /* Offset to first die in this cu from the start of the cu. |
511 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 512 | cu_offset first_die_cu_offset; |
43988095 JK |
513 | |
514 | /* 64-bit signature of this type unit - it is valid only for | |
515 | UNIT_TYPE DW_UT_type. */ | |
516 | ULONGEST signature; | |
517 | ||
518 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 519 | cu_offset type_cu_offset_in_tu; |
a738430d | 520 | }; |
c906108c | 521 | |
3da10d80 KS |
522 | /* Type used for delaying computation of method physnames. |
523 | See comments for compute_delayed_physnames. */ | |
524 | struct delayed_method_info | |
525 | { | |
526 | /* The type to which the method is attached, i.e., its parent class. */ | |
527 | struct type *type; | |
528 | ||
529 | /* The index of the method in the type's function fieldlists. */ | |
530 | int fnfield_index; | |
531 | ||
532 | /* The index of the method in the fieldlist. */ | |
533 | int index; | |
534 | ||
535 | /* The name of the DIE. */ | |
536 | const char *name; | |
537 | ||
538 | /* The DIE associated with this method. */ | |
539 | struct die_info *die; | |
540 | }; | |
541 | ||
542 | typedef struct delayed_method_info delayed_method_info; | |
543 | DEF_VEC_O (delayed_method_info); | |
544 | ||
e7c27a73 DJ |
545 | /* Internal state when decoding a particular compilation unit. */ |
546 | struct dwarf2_cu | |
547 | { | |
548 | /* The objfile containing this compilation unit. */ | |
549 | struct objfile *objfile; | |
550 | ||
d00adf39 | 551 | /* The header of the compilation unit. */ |
e7c27a73 | 552 | struct comp_unit_head header; |
e142c38c | 553 | |
d00adf39 DE |
554 | /* Base address of this compilation unit. */ |
555 | CORE_ADDR base_address; | |
556 | ||
557 | /* Non-zero if base_address has been set. */ | |
558 | int base_known; | |
559 | ||
e142c38c DJ |
560 | /* The language we are debugging. */ |
561 | enum language language; | |
562 | const struct language_defn *language_defn; | |
563 | ||
b0f35d58 DL |
564 | const char *producer; |
565 | ||
e142c38c DJ |
566 | /* The generic symbol table building routines have separate lists for |
567 | file scope symbols and all all other scopes (local scopes). So | |
568 | we need to select the right one to pass to add_symbol_to_list(). | |
569 | We do it by keeping a pointer to the correct list in list_in_scope. | |
570 | ||
571 | FIXME: The original dwarf code just treated the file scope as the | |
572 | first local scope, and all other local scopes as nested local | |
573 | scopes, and worked fine. Check to see if we really need to | |
574 | distinguish these in buildsym.c. */ | |
575 | struct pending **list_in_scope; | |
576 | ||
433df2d4 DE |
577 | /* The abbrev table for this CU. |
578 | Normally this points to the abbrev table in the objfile. | |
579 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
580 | struct abbrev_table *abbrev_table; | |
72bf9492 | 581 | |
b64f50a1 JK |
582 | /* Hash table holding all the loaded partial DIEs |
583 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
584 | htab_t partial_dies; |
585 | ||
586 | /* Storage for things with the same lifetime as this read-in compilation | |
587 | unit, including partial DIEs. */ | |
588 | struct obstack comp_unit_obstack; | |
589 | ||
ae038cb0 DJ |
590 | /* When multiple dwarf2_cu structures are living in memory, this field |
591 | chains them all together, so that they can be released efficiently. | |
592 | We will probably also want a generation counter so that most-recently-used | |
593 | compilation units are cached... */ | |
594 | struct dwarf2_per_cu_data *read_in_chain; | |
595 | ||
69d751e3 | 596 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
597 | struct dwarf2_per_cu_data *per_cu; |
598 | ||
599 | /* How many compilation units ago was this CU last referenced? */ | |
600 | int last_used; | |
601 | ||
b64f50a1 JK |
602 | /* A hash table of DIE cu_offset for following references with |
603 | die_info->offset.sect_off as hash. */ | |
51545339 | 604 | htab_t die_hash; |
10b3939b DJ |
605 | |
606 | /* Full DIEs if read in. */ | |
607 | struct die_info *dies; | |
608 | ||
609 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
610 | units referenced by this one. Only set during full symbol processing; | |
611 | partial symbol tables do not have dependencies. */ | |
612 | htab_t dependencies; | |
613 | ||
cb1df416 DJ |
614 | /* Header data from the line table, during full symbol processing. */ |
615 | struct line_header *line_header; | |
4c8aa72d PA |
616 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
617 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
618 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
619 | to the line header as long as this DIE is being processed. See | |
620 | process_die_scope. */ | |
621 | die_info *line_header_die_owner; | |
cb1df416 | 622 | |
3da10d80 KS |
623 | /* A list of methods which need to have physnames computed |
624 | after all type information has been read. */ | |
625 | VEC (delayed_method_info) *method_list; | |
626 | ||
96408a79 SA |
627 | /* To be copied to symtab->call_site_htab. */ |
628 | htab_t call_site_htab; | |
629 | ||
034e5797 DE |
630 | /* Non-NULL if this CU came from a DWO file. |
631 | There is an invariant here that is important to remember: | |
632 | Except for attributes copied from the top level DIE in the "main" | |
633 | (or "stub") file in preparation for reading the DWO file | |
634 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
635 | Either there isn't a DWO file (in which case this is NULL and the point | |
636 | is moot), or there is and either we're not going to read it (in which | |
637 | case this is NULL) or there is and we are reading it (in which case this | |
638 | is non-NULL). */ | |
3019eac3 DE |
639 | struct dwo_unit *dwo_unit; |
640 | ||
641 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
642 | (zero is a valid value though). | |
1dbab08b | 643 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
644 | ULONGEST addr_base; |
645 | ||
2e3cf129 DE |
646 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
647 | (zero is a valid value though). | |
1dbab08b | 648 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 649 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
650 | be used without needing to know whether DWO files are in use or not. |
651 | N.B. This does not apply to DW_AT_ranges appearing in | |
652 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
653 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
654 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
655 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
656 | ULONGEST ranges_base; |
657 | ||
ae038cb0 DJ |
658 | /* Mark used when releasing cached dies. */ |
659 | unsigned int mark : 1; | |
660 | ||
8be455d7 JK |
661 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
662 | This test is imperfect as there may exist optimized debug code not using | |
663 | any location list and still facing inlining issues if handled as | |
664 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 665 | unsigned int has_loclist : 1; |
ba919b58 | 666 | |
1b80a9fa JK |
667 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
668 | if all the producer_is_* fields are valid. This information is cached | |
669 | because profiling CU expansion showed excessive time spent in | |
670 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
671 | unsigned int checked_producer : 1; |
672 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 673 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 674 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
675 | |
676 | /* When set, the file that we're processing is known to have | |
677 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
678 | this information, but later versions do. */ | |
679 | ||
680 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
681 | }; |
682 | ||
10b3939b DJ |
683 | /* Persistent data held for a compilation unit, even when not |
684 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 685 | read_symtab_private field of the psymtab. */ |
10b3939b | 686 | |
ae038cb0 DJ |
687 | struct dwarf2_per_cu_data |
688 | { | |
36586728 | 689 | /* The start offset and length of this compilation unit. |
45452591 | 690 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
691 | initial_length_size. |
692 | If the DIE refers to a DWO file, this is always of the original die, | |
693 | not the DWO file. */ | |
9c541725 | 694 | sect_offset sect_off; |
36586728 | 695 | unsigned int length; |
ae038cb0 | 696 | |
43988095 JK |
697 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
698 | short dwarf_version; | |
699 | ||
ae038cb0 DJ |
700 | /* Flag indicating this compilation unit will be read in before |
701 | any of the current compilation units are processed. */ | |
c764a876 | 702 | unsigned int queued : 1; |
ae038cb0 | 703 | |
0d99eb77 DE |
704 | /* This flag will be set when reading partial DIEs if we need to load |
705 | absolutely all DIEs for this compilation unit, instead of just the ones | |
706 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
707 | hash table and don't find it. */ |
708 | unsigned int load_all_dies : 1; | |
709 | ||
0186c6a7 DE |
710 | /* Non-zero if this CU is from .debug_types. |
711 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
712 | this is non-zero. */ | |
3019eac3 DE |
713 | unsigned int is_debug_types : 1; |
714 | ||
36586728 TT |
715 | /* Non-zero if this CU is from the .dwz file. */ |
716 | unsigned int is_dwz : 1; | |
717 | ||
a2ce51a0 DE |
718 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
719 | This flag is only valid if is_debug_types is true. | |
720 | We can't read a CU directly from a DWO file: There are required | |
721 | attributes in the stub. */ | |
722 | unsigned int reading_dwo_directly : 1; | |
723 | ||
7ee85ab1 DE |
724 | /* Non-zero if the TU has been read. |
725 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
726 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
727 | fetching them from random other DWOs (due to comdat folding). | |
728 | If the TU has already been read, the optimization is unnecessary | |
729 | (and unwise - we don't want to change where gdb thinks the TU lives | |
730 | "midflight"). | |
731 | This flag is only valid if is_debug_types is true. */ | |
732 | unsigned int tu_read : 1; | |
733 | ||
3019eac3 DE |
734 | /* The section this CU/TU lives in. |
735 | If the DIE refers to a DWO file, this is always the original die, | |
736 | not the DWO file. */ | |
8a0459fd | 737 | struct dwarf2_section_info *section; |
348e048f | 738 | |
17ea53c3 | 739 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
740 | of the CU cache it gets reset to NULL again. This is left as NULL for |
741 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 742 | struct dwarf2_cu *cu; |
1c379e20 | 743 | |
9cdd5dbd DE |
744 | /* The corresponding objfile. |
745 | Normally we can get the objfile from dwarf2_per_objfile. | |
746 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
747 | struct objfile *objfile; |
748 | ||
fffbe6a8 YQ |
749 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
750 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
751 | union |
752 | { | |
753 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 754 | or NULL for unread partial units. */ |
9291a0cd TT |
755 | struct partial_symtab *psymtab; |
756 | ||
757 | /* Data needed by the "quick" functions. */ | |
758 | struct dwarf2_per_cu_quick_data *quick; | |
759 | } v; | |
95554aad | 760 | |
796a7ff8 DE |
761 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
762 | while reading psymtabs, used to compute the psymtab dependencies, | |
763 | and then cleared. Then it is filled in again while reading full | |
764 | symbols, and only deleted when the objfile is destroyed. | |
765 | ||
766 | This is also used to work around a difference between the way gold | |
767 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
768 | is a gold bug. For symbols coming from TUs, gold records in the index | |
769 | the CU that includes the TU instead of the TU itself. This breaks | |
770 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
771 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
772 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
773 | we need to look in TU Z to find X. Fortunately, this is akin to | |
774 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
775 | .gdb_index version <=7 this also records the TUs that the CU referred | |
776 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
777 | indices so we only pay a price for gold generated indices. |
778 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 779 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
780 | }; |
781 | ||
348e048f DE |
782 | /* Entry in the signatured_types hash table. */ |
783 | ||
784 | struct signatured_type | |
785 | { | |
42e7ad6c | 786 | /* The "per_cu" object of this type. |
ac9ec31b | 787 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
788 | N.B.: This is the first member so that it's easy to convert pointers |
789 | between them. */ | |
790 | struct dwarf2_per_cu_data per_cu; | |
791 | ||
3019eac3 | 792 | /* The type's signature. */ |
348e048f DE |
793 | ULONGEST signature; |
794 | ||
3019eac3 | 795 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
796 | If this TU is a DWO stub and the definition lives in a DWO file |
797 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
798 | cu_offset type_offset_in_tu; |
799 | ||
800 | /* Offset in the section of the type's DIE. | |
801 | If the definition lives in a DWO file, this is the offset in the | |
802 | .debug_types.dwo section. | |
803 | The value is zero until the actual value is known. | |
804 | Zero is otherwise not a valid section offset. */ | |
805 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
806 | |
807 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
808 | can share them. This points to the containing symtab. */ | |
809 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
810 | |
811 | /* The type. | |
812 | The first time we encounter this type we fully read it in and install it | |
813 | in the symbol tables. Subsequent times we only need the type. */ | |
814 | struct type *type; | |
a2ce51a0 DE |
815 | |
816 | /* Containing DWO unit. | |
817 | This field is valid iff per_cu.reading_dwo_directly. */ | |
818 | struct dwo_unit *dwo_unit; | |
348e048f DE |
819 | }; |
820 | ||
0186c6a7 DE |
821 | typedef struct signatured_type *sig_type_ptr; |
822 | DEF_VEC_P (sig_type_ptr); | |
823 | ||
094b34ac DE |
824 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
825 | This includes type_unit_group and quick_file_names. */ | |
826 | ||
827 | struct stmt_list_hash | |
828 | { | |
829 | /* The DWO unit this table is from or NULL if there is none. */ | |
830 | struct dwo_unit *dwo_unit; | |
831 | ||
832 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 833 | sect_offset line_sect_off; |
094b34ac DE |
834 | }; |
835 | ||
f4dc4d17 DE |
836 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
837 | an object of this type. */ | |
838 | ||
839 | struct type_unit_group | |
840 | { | |
0186c6a7 | 841 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
842 | To simplify things we create an artificial CU that "includes" all the |
843 | type units using this stmt_list so that the rest of the code still has | |
844 | a "per_cu" handle on the symtab. | |
845 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 846 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
847 | struct dwarf2_per_cu_data per_cu; |
848 | ||
0186c6a7 DE |
849 | /* The TUs that share this DW_AT_stmt_list entry. |
850 | This is added to while parsing type units to build partial symtabs, | |
851 | and is deleted afterwards and not used again. */ | |
852 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 853 | |
43f3e411 | 854 | /* The compunit symtab. |
094b34ac | 855 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
856 | so we create an essentially anonymous symtab as the compunit symtab. */ |
857 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 858 | |
094b34ac DE |
859 | /* The data used to construct the hash key. */ |
860 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
861 | |
862 | /* The number of symtabs from the line header. | |
863 | The value here must match line_header.num_file_names. */ | |
864 | unsigned int num_symtabs; | |
865 | ||
866 | /* The symbol tables for this TU (obtained from the files listed in | |
867 | DW_AT_stmt_list). | |
868 | WARNING: The order of entries here must match the order of entries | |
869 | in the line header. After the first TU using this type_unit_group, the | |
870 | line header for the subsequent TUs is recreated from this. This is done | |
871 | because we need to use the same symtabs for each TU using the same | |
872 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
873 | there's no guarantee the line header doesn't have duplicate entries. */ | |
874 | struct symtab **symtabs; | |
875 | }; | |
876 | ||
73869dc2 | 877 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
878 | |
879 | struct dwo_sections | |
880 | { | |
881 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
882 | struct dwarf2_section_info line; |
883 | struct dwarf2_section_info loc; | |
43988095 | 884 | struct dwarf2_section_info loclists; |
09262596 DE |
885 | struct dwarf2_section_info macinfo; |
886 | struct dwarf2_section_info macro; | |
3019eac3 DE |
887 | struct dwarf2_section_info str; |
888 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
889 | /* In the case of a virtual DWO file, these two are unused. */ |
890 | struct dwarf2_section_info info; | |
3019eac3 DE |
891 | VEC (dwarf2_section_info_def) *types; |
892 | }; | |
893 | ||
c88ee1f0 | 894 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
895 | |
896 | struct dwo_unit | |
897 | { | |
898 | /* Backlink to the containing struct dwo_file. */ | |
899 | struct dwo_file *dwo_file; | |
900 | ||
901 | /* The "id" that distinguishes this CU/TU. | |
902 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
903 | Since signatures came first, we stick with it for consistency. */ | |
904 | ULONGEST signature; | |
905 | ||
906 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 907 | struct dwarf2_section_info *section; |
3019eac3 | 908 | |
9c541725 PA |
909 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
910 | sect_offset sect_off; | |
3019eac3 DE |
911 | unsigned int length; |
912 | ||
913 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
914 | cu_offset type_offset_in_tu; | |
915 | }; | |
916 | ||
73869dc2 DE |
917 | /* include/dwarf2.h defines the DWP section codes. |
918 | It defines a max value but it doesn't define a min value, which we | |
919 | use for error checking, so provide one. */ | |
920 | ||
921 | enum dwp_v2_section_ids | |
922 | { | |
923 | DW_SECT_MIN = 1 | |
924 | }; | |
925 | ||
80626a55 | 926 | /* Data for one DWO file. |
57d63ce2 DE |
927 | |
928 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
929 | appears in a DWP file). DWP files don't really have DWO files per se - | |
930 | comdat folding of types "loses" the DWO file they came from, and from | |
931 | a high level view DWP files appear to contain a mass of random types. | |
932 | However, to maintain consistency with the non-DWP case we pretend DWP | |
933 | files contain virtual DWO files, and we assign each TU with one virtual | |
934 | DWO file (generally based on the line and abbrev section offsets - | |
935 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
936 | |
937 | struct dwo_file | |
938 | { | |
0ac5b59e | 939 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
940 | For virtual DWO files the name is constructed from the section offsets |
941 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
942 | from related CU+TUs. */ | |
0ac5b59e DE |
943 | const char *dwo_name; |
944 | ||
945 | /* The DW_AT_comp_dir attribute. */ | |
946 | const char *comp_dir; | |
3019eac3 | 947 | |
80626a55 DE |
948 | /* The bfd, when the file is open. Otherwise this is NULL. |
949 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
950 | bfd *dbfd; | |
3019eac3 | 951 | |
73869dc2 DE |
952 | /* The sections that make up this DWO file. |
953 | Remember that for virtual DWO files in DWP V2, these are virtual | |
954 | sections (for lack of a better name). */ | |
3019eac3 DE |
955 | struct dwo_sections sections; |
956 | ||
33c5cd75 DB |
957 | /* The CUs in the file. |
958 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
959 | an extension to handle LLVM's Link Time Optimization output (where | |
960 | multiple source files may be compiled into a single object/dwo pair). */ | |
961 | htab_t cus; | |
3019eac3 DE |
962 | |
963 | /* Table of TUs in the file. | |
964 | Each element is a struct dwo_unit. */ | |
965 | htab_t tus; | |
966 | }; | |
967 | ||
80626a55 DE |
968 | /* These sections are what may appear in a DWP file. */ |
969 | ||
970 | struct dwp_sections | |
971 | { | |
73869dc2 | 972 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
973 | struct dwarf2_section_info str; |
974 | struct dwarf2_section_info cu_index; | |
975 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
976 | |
977 | /* These are only used by DWP version 2 files. | |
978 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
979 | sections are referenced by section number, and are not recorded here. | |
980 | In DWP version 2 there is at most one copy of all these sections, each | |
981 | section being (effectively) comprised of the concatenation of all of the | |
982 | individual sections that exist in the version 1 format. | |
983 | To keep the code simple we treat each of these concatenated pieces as a | |
984 | section itself (a virtual section?). */ | |
985 | struct dwarf2_section_info abbrev; | |
986 | struct dwarf2_section_info info; | |
987 | struct dwarf2_section_info line; | |
988 | struct dwarf2_section_info loc; | |
989 | struct dwarf2_section_info macinfo; | |
990 | struct dwarf2_section_info macro; | |
991 | struct dwarf2_section_info str_offsets; | |
992 | struct dwarf2_section_info types; | |
80626a55 DE |
993 | }; |
994 | ||
73869dc2 DE |
995 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
996 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 997 | |
73869dc2 | 998 | struct virtual_v1_dwo_sections |
80626a55 DE |
999 | { |
1000 | struct dwarf2_section_info abbrev; | |
1001 | struct dwarf2_section_info line; | |
1002 | struct dwarf2_section_info loc; | |
1003 | struct dwarf2_section_info macinfo; | |
1004 | struct dwarf2_section_info macro; | |
1005 | struct dwarf2_section_info str_offsets; | |
1006 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 1007 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
1008 | struct dwarf2_section_info info_or_types; |
1009 | }; | |
1010 | ||
73869dc2 DE |
1011 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
1012 | In version 2, the sections of the DWO files are concatenated together | |
1013 | and stored in one section of that name. Thus each ELF section contains | |
1014 | several "virtual" sections. */ | |
1015 | ||
1016 | struct virtual_v2_dwo_sections | |
1017 | { | |
1018 | bfd_size_type abbrev_offset; | |
1019 | bfd_size_type abbrev_size; | |
1020 | ||
1021 | bfd_size_type line_offset; | |
1022 | bfd_size_type line_size; | |
1023 | ||
1024 | bfd_size_type loc_offset; | |
1025 | bfd_size_type loc_size; | |
1026 | ||
1027 | bfd_size_type macinfo_offset; | |
1028 | bfd_size_type macinfo_size; | |
1029 | ||
1030 | bfd_size_type macro_offset; | |
1031 | bfd_size_type macro_size; | |
1032 | ||
1033 | bfd_size_type str_offsets_offset; | |
1034 | bfd_size_type str_offsets_size; | |
1035 | ||
1036 | /* Each DWP hash table entry records one CU or one TU. | |
1037 | That is recorded here, and copied to dwo_unit.section. */ | |
1038 | bfd_size_type info_or_types_offset; | |
1039 | bfd_size_type info_or_types_size; | |
1040 | }; | |
1041 | ||
80626a55 DE |
1042 | /* Contents of DWP hash tables. */ |
1043 | ||
1044 | struct dwp_hash_table | |
1045 | { | |
73869dc2 | 1046 | uint32_t version, nr_columns; |
80626a55 | 1047 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
1048 | const gdb_byte *hash_table, *unit_table; |
1049 | union | |
1050 | { | |
1051 | struct | |
1052 | { | |
1053 | const gdb_byte *indices; | |
1054 | } v1; | |
1055 | struct | |
1056 | { | |
1057 | /* This is indexed by column number and gives the id of the section | |
1058 | in that column. */ | |
1059 | #define MAX_NR_V2_DWO_SECTIONS \ | |
1060 | (1 /* .debug_info or .debug_types */ \ | |
1061 | + 1 /* .debug_abbrev */ \ | |
1062 | + 1 /* .debug_line */ \ | |
1063 | + 1 /* .debug_loc */ \ | |
1064 | + 1 /* .debug_str_offsets */ \ | |
1065 | + 1 /* .debug_macro or .debug_macinfo */) | |
1066 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
1067 | const gdb_byte *offsets; | |
1068 | const gdb_byte *sizes; | |
1069 | } v2; | |
1070 | } section_pool; | |
80626a55 DE |
1071 | }; |
1072 | ||
1073 | /* Data for one DWP file. */ | |
1074 | ||
1075 | struct dwp_file | |
1076 | { | |
1077 | /* Name of the file. */ | |
1078 | const char *name; | |
1079 | ||
73869dc2 DE |
1080 | /* File format version. */ |
1081 | int version; | |
1082 | ||
93417882 | 1083 | /* The bfd. */ |
80626a55 DE |
1084 | bfd *dbfd; |
1085 | ||
1086 | /* Section info for this file. */ | |
1087 | struct dwp_sections sections; | |
1088 | ||
57d63ce2 | 1089 | /* Table of CUs in the file. */ |
80626a55 DE |
1090 | const struct dwp_hash_table *cus; |
1091 | ||
1092 | /* Table of TUs in the file. */ | |
1093 | const struct dwp_hash_table *tus; | |
1094 | ||
19ac8c2e DE |
1095 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1096 | htab_t loaded_cus; | |
1097 | htab_t loaded_tus; | |
80626a55 | 1098 | |
73869dc2 DE |
1099 | /* Table to map ELF section numbers to their sections. |
1100 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1101 | unsigned int num_sections; |
1102 | asection **elf_sections; | |
1103 | }; | |
1104 | ||
36586728 TT |
1105 | /* This represents a '.dwz' file. */ |
1106 | ||
1107 | struct dwz_file | |
1108 | { | |
1109 | /* A dwz file can only contain a few sections. */ | |
1110 | struct dwarf2_section_info abbrev; | |
1111 | struct dwarf2_section_info info; | |
1112 | struct dwarf2_section_info str; | |
1113 | struct dwarf2_section_info line; | |
1114 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1115 | struct dwarf2_section_info gdb_index; |
36586728 TT |
1116 | |
1117 | /* The dwz's BFD. */ | |
1118 | bfd *dwz_bfd; | |
1119 | }; | |
1120 | ||
0963b4bd MS |
1121 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1122 | al. which are used for both .debug_info and .debug_types dies. | |
1123 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1124 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1125 | |
1126 | struct die_reader_specs | |
1127 | { | |
a32a8923 | 1128 | /* The bfd of die_section. */ |
93311388 DE |
1129 | bfd* abfd; |
1130 | ||
1131 | /* The CU of the DIE we are parsing. */ | |
1132 | struct dwarf2_cu *cu; | |
1133 | ||
80626a55 | 1134 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1135 | struct dwo_file *dwo_file; |
1136 | ||
dee91e82 | 1137 | /* The section the die comes from. |
3019eac3 | 1138 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1139 | struct dwarf2_section_info *die_section; |
1140 | ||
1141 | /* die_section->buffer. */ | |
d521ce57 | 1142 | const gdb_byte *buffer; |
f664829e DE |
1143 | |
1144 | /* The end of the buffer. */ | |
1145 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1146 | |
1147 | /* The value of the DW_AT_comp_dir attribute. */ | |
1148 | const char *comp_dir; | |
93311388 DE |
1149 | }; |
1150 | ||
fd820528 | 1151 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1152 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1153 | const gdb_byte *info_ptr, |
dee91e82 DE |
1154 | struct die_info *comp_unit_die, |
1155 | int has_children, | |
1156 | void *data); | |
1157 | ||
ecfb656c PA |
1158 | /* A 1-based directory index. This is a strong typedef to prevent |
1159 | accidentally using a directory index as a 0-based index into an | |
1160 | array/vector. */ | |
1161 | enum class dir_index : unsigned int {}; | |
1162 | ||
1163 | /* Likewise, a 1-based file name index. */ | |
1164 | enum class file_name_index : unsigned int {}; | |
1165 | ||
52059ffd TT |
1166 | struct file_entry |
1167 | { | |
fff8551c PA |
1168 | file_entry () = default; |
1169 | ||
ecfb656c | 1170 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1171 | unsigned int mod_time_, unsigned int length_) |
1172 | : name (name_), | |
ecfb656c | 1173 | d_index (d_index_), |
fff8551c PA |
1174 | mod_time (mod_time_), |
1175 | length (length_) | |
1176 | {} | |
1177 | ||
ecfb656c PA |
1178 | /* Return the include directory at D_INDEX stored in LH. Returns |
1179 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1180 | const char *include_dir (const line_header *lh) const; |
1181 | ||
fff8551c PA |
1182 | /* The file name. Note this is an observing pointer. The memory is |
1183 | owned by debug_line_buffer. */ | |
1184 | const char *name {}; | |
1185 | ||
8c43009f | 1186 | /* The directory index (1-based). */ |
ecfb656c | 1187 | dir_index d_index {}; |
fff8551c PA |
1188 | |
1189 | unsigned int mod_time {}; | |
1190 | ||
1191 | unsigned int length {}; | |
1192 | ||
1193 | /* True if referenced by the Line Number Program. */ | |
1194 | bool included_p {}; | |
1195 | ||
83769d0b | 1196 | /* The associated symbol table, if any. */ |
fff8551c | 1197 | struct symtab *symtab {}; |
52059ffd TT |
1198 | }; |
1199 | ||
debd256d JB |
1200 | /* The line number information for a compilation unit (found in the |
1201 | .debug_line section) begins with a "statement program header", | |
1202 | which contains the following information. */ | |
1203 | struct line_header | |
1204 | { | |
fff8551c PA |
1205 | line_header () |
1206 | : offset_in_dwz {} | |
1207 | {} | |
1208 | ||
1209 | /* Add an entry to the include directory table. */ | |
1210 | void add_include_dir (const char *include_dir); | |
1211 | ||
1212 | /* Add an entry to the file name table. */ | |
ecfb656c | 1213 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1214 | unsigned int mod_time, unsigned int length); |
1215 | ||
ecfb656c | 1216 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1217 | is out of bounds. */ |
ecfb656c | 1218 | const char *include_dir_at (dir_index index) const |
8c43009f | 1219 | { |
ecfb656c PA |
1220 | /* Convert directory index number (1-based) to vector index |
1221 | (0-based). */ | |
1222 | size_t vec_index = to_underlying (index) - 1; | |
1223 | ||
1224 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1225 | return NULL; |
ecfb656c | 1226 | return include_dirs[vec_index]; |
8c43009f PA |
1227 | } |
1228 | ||
ecfb656c | 1229 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1230 | is out of bounds. */ |
ecfb656c | 1231 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1232 | { |
ecfb656c PA |
1233 | /* Convert file name index number (1-based) to vector index |
1234 | (0-based). */ | |
1235 | size_t vec_index = to_underlying (index) - 1; | |
1236 | ||
1237 | if (vec_index >= file_names.size ()) | |
fff8551c | 1238 | return NULL; |
ecfb656c | 1239 | return &file_names[vec_index]; |
fff8551c PA |
1240 | } |
1241 | ||
1242 | /* Const version of the above. */ | |
1243 | const file_entry *file_name_at (unsigned int index) const | |
1244 | { | |
1245 | if (index >= file_names.size ()) | |
8c43009f PA |
1246 | return NULL; |
1247 | return &file_names[index]; | |
1248 | } | |
1249 | ||
527f3840 | 1250 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1251 | sect_offset sect_off {}; |
527f3840 JK |
1252 | |
1253 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1254 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1255 | ||
1256 | unsigned int total_length {}; | |
1257 | unsigned short version {}; | |
1258 | unsigned int header_length {}; | |
1259 | unsigned char minimum_instruction_length {}; | |
1260 | unsigned char maximum_ops_per_instruction {}; | |
1261 | unsigned char default_is_stmt {}; | |
1262 | int line_base {}; | |
1263 | unsigned char line_range {}; | |
1264 | unsigned char opcode_base {}; | |
debd256d JB |
1265 | |
1266 | /* standard_opcode_lengths[i] is the number of operands for the | |
1267 | standard opcode whose value is i. This means that | |
1268 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1269 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1270 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1271 | |
fff8551c PA |
1272 | /* The include_directories table. Note these are observing |
1273 | pointers. The memory is owned by debug_line_buffer. */ | |
1274 | std::vector<const char *> include_dirs; | |
debd256d | 1275 | |
fff8551c PA |
1276 | /* The file_names table. */ |
1277 | std::vector<file_entry> file_names; | |
debd256d JB |
1278 | |
1279 | /* The start and end of the statement program following this | |
6502dd73 | 1280 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1281 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1282 | }; |
c906108c | 1283 | |
fff8551c PA |
1284 | typedef std::unique_ptr<line_header> line_header_up; |
1285 | ||
8c43009f PA |
1286 | const char * |
1287 | file_entry::include_dir (const line_header *lh) const | |
1288 | { | |
ecfb656c | 1289 | return lh->include_dir_at (d_index); |
8c43009f PA |
1290 | } |
1291 | ||
c906108c | 1292 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1293 | need this much information. */ |
c906108c SS |
1294 | struct partial_die_info |
1295 | { | |
72bf9492 | 1296 | /* Offset of this DIE. */ |
9c541725 | 1297 | sect_offset sect_off; |
72bf9492 DJ |
1298 | |
1299 | /* DWARF-2 tag for this DIE. */ | |
1300 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1301 | ||
72bf9492 DJ |
1302 | /* Assorted flags describing the data found in this DIE. */ |
1303 | unsigned int has_children : 1; | |
1304 | unsigned int is_external : 1; | |
1305 | unsigned int is_declaration : 1; | |
1306 | unsigned int has_type : 1; | |
1307 | unsigned int has_specification : 1; | |
1308 | unsigned int has_pc_info : 1; | |
481860b3 | 1309 | unsigned int may_be_inlined : 1; |
72bf9492 | 1310 | |
0c1b455e TT |
1311 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1312 | unsigned int main_subprogram : 1; | |
1313 | ||
72bf9492 DJ |
1314 | /* Flag set if the SCOPE field of this structure has been |
1315 | computed. */ | |
1316 | unsigned int scope_set : 1; | |
1317 | ||
fa4028e9 JB |
1318 | /* Flag set if the DIE has a byte_size attribute. */ |
1319 | unsigned int has_byte_size : 1; | |
1320 | ||
ff908ebf AW |
1321 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1322 | unsigned int has_const_value : 1; | |
1323 | ||
98bfdba5 PA |
1324 | /* Flag set if any of the DIE's children are template arguments. */ |
1325 | unsigned int has_template_arguments : 1; | |
1326 | ||
abc72ce4 DE |
1327 | /* Flag set if fixup_partial_die has been called on this die. */ |
1328 | unsigned int fixup_called : 1; | |
1329 | ||
36586728 TT |
1330 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1331 | unsigned int is_dwz : 1; | |
1332 | ||
1333 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1334 | unsigned int spec_is_dwz : 1; | |
1335 | ||
72bf9492 | 1336 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1337 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1338 | const char *name; |
72bf9492 | 1339 | |
abc72ce4 DE |
1340 | /* The linkage name, if present. */ |
1341 | const char *linkage_name; | |
1342 | ||
72bf9492 DJ |
1343 | /* The scope to prepend to our children. This is generally |
1344 | allocated on the comp_unit_obstack, so will disappear | |
1345 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1346 | const char *scope; |
72bf9492 | 1347 | |
95554aad TT |
1348 | /* Some data associated with the partial DIE. The tag determines |
1349 | which field is live. */ | |
1350 | union | |
1351 | { | |
1352 | /* The location description associated with this DIE, if any. */ | |
1353 | struct dwarf_block *locdesc; | |
1354 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1355 | sect_offset sect_off; |
95554aad | 1356 | } d; |
72bf9492 DJ |
1357 | |
1358 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1359 | CORE_ADDR lowpc; |
1360 | CORE_ADDR highpc; | |
72bf9492 | 1361 | |
93311388 | 1362 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1363 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1364 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1365 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1366 | const gdb_byte *sibling; |
72bf9492 DJ |
1367 | |
1368 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1369 | DW_AT_specification (or DW_AT_abstract_origin or | |
1370 | DW_AT_extension). */ | |
b64f50a1 | 1371 | sect_offset spec_offset; |
72bf9492 DJ |
1372 | |
1373 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1374 | if any. */ | |
1375 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1376 | }; |
1377 | ||
0963b4bd | 1378 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1379 | struct abbrev_info |
1380 | { | |
1381 | unsigned int number; /* number identifying abbrev */ | |
1382 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1383 | unsigned short has_children; /* boolean */ |
1384 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1385 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1386 | struct abbrev_info *next; /* next in chain */ | |
1387 | }; | |
1388 | ||
1389 | struct attr_abbrev | |
1390 | { | |
9d25dd43 DE |
1391 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1392 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1393 | |
1394 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1395 | LONGEST implicit_const; | |
c906108c SS |
1396 | }; |
1397 | ||
433df2d4 DE |
1398 | /* Size of abbrev_table.abbrev_hash_table. */ |
1399 | #define ABBREV_HASH_SIZE 121 | |
1400 | ||
1401 | /* Top level data structure to contain an abbreviation table. */ | |
1402 | ||
1403 | struct abbrev_table | |
1404 | { | |
f4dc4d17 DE |
1405 | /* Where the abbrev table came from. |
1406 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1407 | sect_offset sect_off; |
433df2d4 DE |
1408 | |
1409 | /* Storage for the abbrev table. */ | |
1410 | struct obstack abbrev_obstack; | |
1411 | ||
1412 | /* Hash table of abbrevs. | |
1413 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1414 | It could be statically allocated, but the previous code didn't so we | |
1415 | don't either. */ | |
1416 | struct abbrev_info **abbrevs; | |
1417 | }; | |
1418 | ||
0963b4bd | 1419 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1420 | struct attribute |
1421 | { | |
9d25dd43 | 1422 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1423 | ENUM_BITFIELD(dwarf_form) form : 15; |
1424 | ||
1425 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1426 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1427 | here for better struct attribute alignment. */ | |
1428 | unsigned int string_is_canonical : 1; | |
1429 | ||
b60c80d6 DJ |
1430 | union |
1431 | { | |
15d034d0 | 1432 | const char *str; |
b60c80d6 | 1433 | struct dwarf_block *blk; |
43bbcdc2 PH |
1434 | ULONGEST unsnd; |
1435 | LONGEST snd; | |
b60c80d6 | 1436 | CORE_ADDR addr; |
ac9ec31b | 1437 | ULONGEST signature; |
b60c80d6 DJ |
1438 | } |
1439 | u; | |
1440 | }; | |
1441 | ||
0963b4bd | 1442 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1443 | struct die_info |
1444 | { | |
76815b17 DE |
1445 | /* DWARF-2 tag for this DIE. */ |
1446 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1447 | ||
1448 | /* Number of attributes */ | |
98bfdba5 PA |
1449 | unsigned char num_attrs; |
1450 | ||
1451 | /* True if we're presently building the full type name for the | |
1452 | type derived from this DIE. */ | |
1453 | unsigned char building_fullname : 1; | |
76815b17 | 1454 | |
adde2bff DE |
1455 | /* True if this die is in process. PR 16581. */ |
1456 | unsigned char in_process : 1; | |
1457 | ||
76815b17 DE |
1458 | /* Abbrev number */ |
1459 | unsigned int abbrev; | |
1460 | ||
93311388 | 1461 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1462 | sect_offset sect_off; |
78ba4af6 JB |
1463 | |
1464 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1465 | points to this die's parent; CHILD points to the first child of | |
1466 | this node; and all the children of a given node are chained | |
4950bc1c | 1467 | together via their SIBLING fields. */ |
639d11d3 DC |
1468 | struct die_info *child; /* Its first child, if any. */ |
1469 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1470 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1471 | |
b60c80d6 DJ |
1472 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1473 | zero, but it's not common and zero-sized arrays are not | |
1474 | sufficiently portable C. */ | |
1475 | struct attribute attrs[1]; | |
c906108c SS |
1476 | }; |
1477 | ||
0963b4bd | 1478 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1479 | |
1480 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1481 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1482 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1483 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1484 | #define DW_SND(attr) ((attr)->u.snd) | |
1485 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1486 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1487 | |
0963b4bd | 1488 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1489 | struct dwarf_block |
1490 | { | |
56eb65bd | 1491 | size_t size; |
1d6edc3c JK |
1492 | |
1493 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1494 | const gdb_byte *data; |
c906108c SS |
1495 | }; |
1496 | ||
c906108c SS |
1497 | #ifndef ATTR_ALLOC_CHUNK |
1498 | #define ATTR_ALLOC_CHUNK 4 | |
1499 | #endif | |
1500 | ||
c906108c SS |
1501 | /* Allocate fields for structs, unions and enums in this size. */ |
1502 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1503 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1504 | #endif | |
1505 | ||
c906108c SS |
1506 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1507 | but this would require a corresponding change in unpack_field_as_long | |
1508 | and friends. */ | |
1509 | static int bits_per_byte = 8; | |
1510 | ||
52059ffd TT |
1511 | struct nextfield |
1512 | { | |
1513 | struct nextfield *next; | |
1514 | int accessibility; | |
1515 | int virtuality; | |
1516 | struct field field; | |
1517 | }; | |
1518 | ||
1519 | struct nextfnfield | |
1520 | { | |
1521 | struct nextfnfield *next; | |
1522 | struct fn_field fnfield; | |
1523 | }; | |
1524 | ||
1525 | struct fnfieldlist | |
1526 | { | |
1527 | const char *name; | |
1528 | int length; | |
1529 | struct nextfnfield *head; | |
1530 | }; | |
1531 | ||
1532 | struct typedef_field_list | |
1533 | { | |
1534 | struct typedef_field field; | |
1535 | struct typedef_field_list *next; | |
1536 | }; | |
1537 | ||
c906108c SS |
1538 | /* The routines that read and process dies for a C struct or C++ class |
1539 | pass lists of data member fields and lists of member function fields | |
1540 | in an instance of a field_info structure, as defined below. */ | |
1541 | struct field_info | |
c5aa993b | 1542 | { |
0963b4bd | 1543 | /* List of data member and baseclasses fields. */ |
52059ffd | 1544 | struct nextfield *fields, *baseclasses; |
c906108c | 1545 | |
7d0ccb61 | 1546 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1547 | int nfields; |
c906108c | 1548 | |
c5aa993b JM |
1549 | /* Number of baseclasses. */ |
1550 | int nbaseclasses; | |
c906108c | 1551 | |
c5aa993b JM |
1552 | /* Set if the accesibility of one of the fields is not public. */ |
1553 | int non_public_fields; | |
c906108c | 1554 | |
c5aa993b JM |
1555 | /* Member function fieldlist array, contains name of possibly overloaded |
1556 | member function, number of overloaded member functions and a pointer | |
1557 | to the head of the member function field chain. */ | |
52059ffd | 1558 | struct fnfieldlist *fnfieldlists; |
c906108c | 1559 | |
c5aa993b JM |
1560 | /* Number of entries in the fnfieldlists array. */ |
1561 | int nfnfields; | |
98751a41 JK |
1562 | |
1563 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1564 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1565 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1566 | unsigned typedef_field_list_count; |
c5aa993b | 1567 | }; |
c906108c | 1568 | |
10b3939b DJ |
1569 | /* One item on the queue of compilation units to read in full symbols |
1570 | for. */ | |
1571 | struct dwarf2_queue_item | |
1572 | { | |
1573 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1574 | enum language pretend_language; |
10b3939b DJ |
1575 | struct dwarf2_queue_item *next; |
1576 | }; | |
1577 | ||
1578 | /* The current queue. */ | |
1579 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1580 | ||
ae038cb0 DJ |
1581 | /* Loaded secondary compilation units are kept in memory until they |
1582 | have not been referenced for the processing of this many | |
1583 | compilation units. Set this to zero to disable caching. Cache | |
1584 | sizes of up to at least twenty will improve startup time for | |
1585 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1586 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1587 | static void |
b4f54984 DE |
1588 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1589 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1590 | { |
3e43a32a | 1591 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1592 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1593 | value); |
1594 | } | |
4390d890 | 1595 | \f |
c906108c SS |
1596 | /* local function prototypes */ |
1597 | ||
a32a8923 DE |
1598 | static const char *get_section_name (const struct dwarf2_section_info *); |
1599 | ||
1600 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1601 | ||
918dd910 JK |
1602 | static void dwarf2_find_base_address (struct die_info *die, |
1603 | struct dwarf2_cu *cu); | |
1604 | ||
0018ea6f DE |
1605 | static struct partial_symtab *create_partial_symtab |
1606 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1607 | ||
f1902523 JK |
1608 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1609 | const gdb_byte *info_ptr, | |
1610 | struct die_info *type_unit_die, | |
1611 | int has_children, void *data); | |
1612 | ||
c67a9c90 | 1613 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1614 | |
72bf9492 DJ |
1615 | static void scan_partial_symbols (struct partial_die_info *, |
1616 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1617 | int, struct dwarf2_cu *); |
c906108c | 1618 | |
72bf9492 DJ |
1619 | static void add_partial_symbol (struct partial_die_info *, |
1620 | struct dwarf2_cu *); | |
63d06c5c | 1621 | |
72bf9492 DJ |
1622 | static void add_partial_namespace (struct partial_die_info *pdi, |
1623 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1624 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1625 | |
5d7cb8df | 1626 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1627 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1628 | struct dwarf2_cu *cu); |
1629 | ||
72bf9492 DJ |
1630 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1631 | struct dwarf2_cu *cu); | |
91c24f0a | 1632 | |
bc30ff58 JB |
1633 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1634 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1635 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1636 | |
257e7a09 YQ |
1637 | static void dwarf2_read_symtab (struct partial_symtab *, |
1638 | struct objfile *); | |
c906108c | 1639 | |
a14ed312 | 1640 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1641 | |
433df2d4 DE |
1642 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1643 | (const struct abbrev_table *, unsigned int); | |
1644 | ||
1645 | static struct abbrev_table *abbrev_table_read_table | |
1646 | (struct dwarf2_section_info *, sect_offset); | |
1647 | ||
1648 | static void abbrev_table_free (struct abbrev_table *); | |
1649 | ||
f4dc4d17 DE |
1650 | static void abbrev_table_free_cleanup (void *); |
1651 | ||
dee91e82 DE |
1652 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1653 | struct dwarf2_section_info *); | |
c906108c | 1654 | |
f3dd6933 | 1655 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1656 | |
d521ce57 | 1657 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1658 | |
dee91e82 | 1659 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1660 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1661 | |
d521ce57 TT |
1662 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1663 | struct partial_die_info *, | |
1664 | struct abbrev_info *, | |
1665 | unsigned int, | |
1666 | const gdb_byte *); | |
c906108c | 1667 | |
36586728 | 1668 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1669 | struct dwarf2_cu *); |
72bf9492 DJ |
1670 | |
1671 | static void fixup_partial_die (struct partial_die_info *, | |
1672 | struct dwarf2_cu *); | |
1673 | ||
d521ce57 TT |
1674 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1675 | struct attribute *, struct attr_abbrev *, | |
1676 | const gdb_byte *); | |
a8329558 | 1677 | |
a1855c1d | 1678 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1679 | |
a1855c1d | 1680 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1681 | |
a1855c1d | 1682 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1683 | |
a1855c1d | 1684 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1685 | |
a1855c1d | 1686 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1687 | |
d521ce57 | 1688 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1689 | unsigned int *); |
c906108c | 1690 | |
d521ce57 | 1691 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1692 | |
1693 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1694 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1695 | unsigned int *, unsigned int *); |
613e1657 | 1696 | |
d521ce57 TT |
1697 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1698 | const struct comp_unit_head *, | |
c764a876 DE |
1699 | unsigned int *); |
1700 | ||
d521ce57 | 1701 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1702 | |
f4dc4d17 DE |
1703 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1704 | sect_offset); | |
1705 | ||
d521ce57 | 1706 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1707 | |
d521ce57 | 1708 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1709 | |
d521ce57 TT |
1710 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1711 | const struct comp_unit_head *, | |
1712 | unsigned int *); | |
4bdf3d34 | 1713 | |
43988095 JK |
1714 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1715 | const struct comp_unit_head *, | |
1716 | unsigned int *); | |
36586728 | 1717 | |
43988095 | 1718 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1719 | |
d521ce57 | 1720 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1721 | |
d521ce57 TT |
1722 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1723 | const gdb_byte *, | |
3019eac3 DE |
1724 | unsigned int *); |
1725 | ||
d521ce57 | 1726 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1727 | ULONGEST str_index); |
3019eac3 | 1728 | |
e142c38c | 1729 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1730 | |
e142c38c DJ |
1731 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1732 | struct dwarf2_cu *); | |
c906108c | 1733 | |
348e048f | 1734 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1735 | unsigned int); |
348e048f | 1736 | |
7d45c7c3 KB |
1737 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1738 | struct dwarf2_cu *cu); | |
1739 | ||
05cf31d1 JB |
1740 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1741 | struct dwarf2_cu *cu); | |
1742 | ||
e142c38c | 1743 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1744 | |
e142c38c | 1745 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1746 | struct dwarf2_cu **); |
63d06c5c | 1747 | |
9c541725 | 1748 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1749 | struct dwarf2_cu *cu); |
debd256d | 1750 | |
f3f5162e | 1751 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1752 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1753 | CORE_ADDR, int decode_mapping); |
c906108c | 1754 | |
4d663531 | 1755 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1756 | |
43f3e411 DE |
1757 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1758 | const char *, const char *, | |
1759 | CORE_ADDR); | |
f4dc4d17 | 1760 | |
a14ed312 | 1761 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1762 | struct dwarf2_cu *); |
c906108c | 1763 | |
34eaf542 TT |
1764 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1765 | struct dwarf2_cu *, struct symbol *); | |
1766 | ||
ff39bb5e | 1767 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1768 | struct dwarf2_cu *); |
c906108c | 1769 | |
ff39bb5e | 1770 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1771 | struct type *type, |
1772 | const char *name, | |
1773 | struct obstack *obstack, | |
12df843f | 1774 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1775 | const gdb_byte **bytes, |
98bfdba5 | 1776 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1777 | |
e7c27a73 | 1778 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1779 | |
b4ba55a1 JB |
1780 | static int need_gnat_info (struct dwarf2_cu *); |
1781 | ||
3e43a32a MS |
1782 | static struct type *die_descriptive_type (struct die_info *, |
1783 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1784 | |
1785 | static void set_descriptive_type (struct type *, struct die_info *, | |
1786 | struct dwarf2_cu *); | |
1787 | ||
e7c27a73 DJ |
1788 | static struct type *die_containing_type (struct die_info *, |
1789 | struct dwarf2_cu *); | |
c906108c | 1790 | |
ff39bb5e | 1791 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1792 | struct dwarf2_cu *); |
c906108c | 1793 | |
f792889a | 1794 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1795 | |
673bfd45 DE |
1796 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1797 | ||
0d5cff50 | 1798 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1799 | |
6e70227d | 1800 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1801 | const char *suffix, int physname, |
1802 | struct dwarf2_cu *cu); | |
63d06c5c | 1803 | |
e7c27a73 | 1804 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1805 | |
348e048f DE |
1806 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1807 | ||
e7c27a73 | 1808 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1809 | |
e7c27a73 | 1810 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1811 | |
96408a79 SA |
1812 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1813 | ||
71a3c369 TT |
1814 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1815 | ||
ff013f42 JK |
1816 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1817 | struct dwarf2_cu *, struct partial_symtab *); | |
1818 | ||
3a2b436a | 1819 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1820 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1821 | enum pc_bounds_kind |
1822 | { | |
e385593e | 1823 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1824 | PC_BOUNDS_NOT_PRESENT, |
1825 | ||
e385593e JK |
1826 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1827 | were present but they do not form a valid range of PC addresses. */ | |
1828 | PC_BOUNDS_INVALID, | |
1829 | ||
3a2b436a JK |
1830 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1831 | PC_BOUNDS_RANGES, | |
1832 | ||
1833 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1834 | PC_BOUNDS_HIGH_LOW, | |
1835 | }; | |
1836 | ||
1837 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1838 | CORE_ADDR *, CORE_ADDR *, | |
1839 | struct dwarf2_cu *, | |
1840 | struct partial_symtab *); | |
c906108c | 1841 | |
fae299cd DC |
1842 | static void get_scope_pc_bounds (struct die_info *, |
1843 | CORE_ADDR *, CORE_ADDR *, | |
1844 | struct dwarf2_cu *); | |
1845 | ||
801e3a5b JB |
1846 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1847 | CORE_ADDR, struct dwarf2_cu *); | |
1848 | ||
a14ed312 | 1849 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1850 | struct dwarf2_cu *); |
c906108c | 1851 | |
a14ed312 | 1852 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1853 | struct type *, struct dwarf2_cu *); |
c906108c | 1854 | |
a14ed312 | 1855 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1856 | struct die_info *, struct type *, |
e7c27a73 | 1857 | struct dwarf2_cu *); |
c906108c | 1858 | |
a14ed312 | 1859 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1860 | struct type *, |
1861 | struct dwarf2_cu *); | |
c906108c | 1862 | |
134d01f1 | 1863 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1864 | |
e7c27a73 | 1865 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1866 | |
e7c27a73 | 1867 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1868 | |
5d7cb8df JK |
1869 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1870 | ||
22cee43f PMR |
1871 | static struct using_direct **using_directives (enum language); |
1872 | ||
27aa8d6a SW |
1873 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1874 | ||
74921315 KS |
1875 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1876 | ||
f55ee35c JK |
1877 | static struct type *read_module_type (struct die_info *die, |
1878 | struct dwarf2_cu *cu); | |
1879 | ||
38d518c9 | 1880 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1881 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1882 | |
134d01f1 | 1883 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1884 | |
e7c27a73 | 1885 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1886 | |
6e70227d | 1887 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1888 | struct dwarf2_cu *); |
1889 | ||
bf6af496 | 1890 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1891 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1892 | struct die_info *); |
639d11d3 | 1893 | |
dee91e82 | 1894 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1895 | const gdb_byte *info_ptr, |
1896 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1897 | struct die_info *parent); |
1898 | ||
d521ce57 TT |
1899 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1900 | struct die_info **, const gdb_byte *, | |
1901 | int *, int); | |
3019eac3 | 1902 | |
d521ce57 TT |
1903 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1904 | struct die_info **, const gdb_byte *, | |
1905 | int *); | |
93311388 | 1906 | |
e7c27a73 | 1907 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1908 | |
15d034d0 TT |
1909 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1910 | struct obstack *); | |
71c25dea | 1911 | |
15d034d0 | 1912 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1913 | |
15d034d0 | 1914 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1915 | struct die_info *die, |
1916 | struct dwarf2_cu *cu); | |
1917 | ||
ca69b9e6 DE |
1918 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1919 | struct dwarf2_cu *cu); | |
1920 | ||
e142c38c | 1921 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1922 | struct dwarf2_cu **); |
9219021c | 1923 | |
f39c6ffd | 1924 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1925 | |
f39c6ffd | 1926 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1927 | |
f39c6ffd | 1928 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1929 | |
a121b7c1 | 1930 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1931 | |
f39c6ffd | 1932 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1933 | |
f9aca02d | 1934 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1935 | |
d97bc12b DE |
1936 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1937 | ||
1938 | static void dump_die_for_error (struct die_info *); | |
1939 | ||
1940 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1941 | struct die_info *); | |
c906108c | 1942 | |
d97bc12b | 1943 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1944 | |
51545339 | 1945 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1946 | struct dwarf2_cu *); |
c906108c | 1947 | |
ff39bb5e | 1948 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1949 | |
ff39bb5e | 1950 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1951 | |
348e048f | 1952 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1953 | const struct attribute *, |
348e048f DE |
1954 | struct dwarf2_cu **); |
1955 | ||
10b3939b | 1956 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1957 | const struct attribute *, |
f2f0e013 | 1958 | struct dwarf2_cu **); |
c906108c | 1959 | |
348e048f | 1960 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1961 | const struct attribute *, |
348e048f DE |
1962 | struct dwarf2_cu **); |
1963 | ||
ac9ec31b DE |
1964 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1965 | struct dwarf2_cu *); | |
1966 | ||
1967 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1968 | const struct attribute *, |
ac9ec31b DE |
1969 | struct dwarf2_cu *); |
1970 | ||
e5fe5e75 | 1971 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1972 | |
52dc124a | 1973 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1974 | |
63e43d3a PMR |
1975 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1976 | struct die_info *die, struct dwarf2_cu *cu, | |
1977 | struct dynamic_prop *prop); | |
1978 | ||
c906108c SS |
1979 | /* memory allocation interface */ |
1980 | ||
7b5a2f43 | 1981 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1982 | |
b60c80d6 | 1983 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1984 | |
43f3e411 | 1985 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1986 | |
6e5a29e1 | 1987 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1988 | |
6e5a29e1 | 1989 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1990 | |
6e5a29e1 | 1991 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1992 | |
6e5a29e1 | 1993 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1994 | |
8cf6f0b1 TT |
1995 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1996 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1997 | const struct attribute *attr); |
8cf6f0b1 | 1998 | |
ff39bb5e | 1999 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 2000 | struct symbol *sym, |
f1e6e072 TT |
2001 | struct dwarf2_cu *cu, |
2002 | int is_block); | |
4c2df51b | 2003 | |
d521ce57 TT |
2004 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
2005 | const gdb_byte *info_ptr, | |
2006 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 2007 | |
72bf9492 DJ |
2008 | static void free_stack_comp_unit (void *); |
2009 | ||
72bf9492 DJ |
2010 | static hashval_t partial_die_hash (const void *item); |
2011 | ||
2012 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
2013 | ||
ae038cb0 | 2014 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 2015 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 2016 | |
9816fde3 | 2017 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 2018 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
2019 | |
2020 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
2021 | struct die_info *comp_unit_die, |
2022 | enum language pretend_language); | |
93311388 | 2023 | |
68dc6402 | 2024 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
2025 | |
2026 | static void free_cached_comp_units (void *); | |
2027 | ||
2028 | static void age_cached_comp_units (void); | |
2029 | ||
dee91e82 | 2030 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 2031 | |
f792889a DJ |
2032 | static struct type *set_die_type (struct die_info *, struct type *, |
2033 | struct dwarf2_cu *); | |
1c379e20 | 2034 | |
ae038cb0 DJ |
2035 | static void create_all_comp_units (struct objfile *); |
2036 | ||
0e50663e | 2037 | static int create_all_type_units (struct objfile *); |
1fd400ff | 2038 | |
95554aad TT |
2039 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
2040 | enum language); | |
10b3939b | 2041 | |
95554aad TT |
2042 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
2043 | enum language); | |
10b3939b | 2044 | |
f4dc4d17 DE |
2045 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
2046 | enum language); | |
2047 | ||
10b3939b DJ |
2048 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
2049 | struct dwarf2_per_cu_data *); | |
2050 | ||
ae038cb0 DJ |
2051 | static void dwarf2_mark (struct dwarf2_cu *); |
2052 | ||
2053 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
2054 | ||
b64f50a1 | 2055 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 2056 | struct dwarf2_per_cu_data *); |
673bfd45 | 2057 | |
f792889a | 2058 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 2059 | |
9291a0cd TT |
2060 | static void dwarf2_release_queue (void *dummy); |
2061 | ||
95554aad TT |
2062 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
2063 | enum language pretend_language); | |
2064 | ||
a0f42c21 | 2065 | static void process_queue (void); |
9291a0cd | 2066 | |
d721ba37 PA |
2067 | /* The return type of find_file_and_directory. Note, the enclosed |
2068 | string pointers are only valid while this object is valid. */ | |
2069 | ||
2070 | struct file_and_directory | |
2071 | { | |
2072 | /* The filename. This is never NULL. */ | |
2073 | const char *name; | |
2074 | ||
2075 | /* The compilation directory. NULL if not known. If we needed to | |
2076 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2077 | points directly to the DW_AT_comp_dir string attribute owned by | |
2078 | the obstack that owns the DIE. */ | |
2079 | const char *comp_dir; | |
2080 | ||
2081 | /* If we needed to build a new string for comp_dir, this is what | |
2082 | owns the storage. */ | |
2083 | std::string comp_dir_storage; | |
2084 | }; | |
2085 | ||
2086 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2087 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2088 | |
2089 | static char *file_full_name (int file, struct line_header *lh, | |
2090 | const char *comp_dir); | |
2091 | ||
43988095 JK |
2092 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2093 | enum class rcuh_kind { COMPILE, TYPE }; | |
2094 | ||
d521ce57 | 2095 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2096 | (struct comp_unit_head *header, |
2097 | struct dwarf2_section_info *section, | |
d521ce57 | 2098 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2099 | rcuh_kind section_kind); |
36586728 | 2100 | |
fd820528 | 2101 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2102 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2103 | int use_existing_cu, int keep, | |
3019eac3 DE |
2104 | die_reader_func_ftype *die_reader_func, void *data); |
2105 | ||
dee91e82 DE |
2106 | static void init_cutu_and_read_dies_simple |
2107 | (struct dwarf2_per_cu_data *this_cu, | |
2108 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2109 | |
673bfd45 | 2110 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2111 | |
3019eac3 DE |
2112 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2113 | ||
57d63ce2 DE |
2114 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2115 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2116 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2117 | |
2118 | static struct dwp_file *get_dwp_file (void); | |
2119 | ||
3019eac3 | 2120 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2121 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2122 | |
2123 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2124 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2125 | |
89e63ee4 DE |
2126 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2127 | ||
3019eac3 DE |
2128 | static void free_dwo_file_cleanup (void *); |
2129 | ||
95554aad TT |
2130 | static void process_cu_includes (void); |
2131 | ||
1b80a9fa | 2132 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2133 | |
2134 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2135 | \f |
2136 | /* Various complaints about symbol reading that don't abort the process. */ | |
2137 | ||
2138 | static void | |
2139 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2140 | { | |
2141 | complaint (&symfile_complaints, | |
2142 | _("statement list doesn't fit in .debug_line section")); | |
2143 | } | |
2144 | ||
2145 | static void | |
2146 | dwarf2_debug_line_missing_file_complaint (void) | |
2147 | { | |
2148 | complaint (&symfile_complaints, | |
2149 | _(".debug_line section has line data without a file")); | |
2150 | } | |
2151 | ||
2152 | static void | |
2153 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2154 | { | |
2155 | complaint (&symfile_complaints, | |
2156 | _(".debug_line section has line " | |
2157 | "program sequence without an end")); | |
2158 | } | |
2159 | ||
2160 | static void | |
2161 | dwarf2_complex_location_expr_complaint (void) | |
2162 | { | |
2163 | complaint (&symfile_complaints, _("location expression too complex")); | |
2164 | } | |
2165 | ||
2166 | static void | |
2167 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2168 | int arg3) | |
2169 | { | |
2170 | complaint (&symfile_complaints, | |
2171 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2172 | arg1, arg2, arg3); | |
2173 | } | |
2174 | ||
2175 | static void | |
2176 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2177 | { | |
2178 | complaint (&symfile_complaints, | |
2179 | _("debug info runs off end of %s section" | |
2180 | " [in module %s]"), | |
a32a8923 DE |
2181 | get_section_name (section), |
2182 | get_section_file_name (section)); | |
4390d890 | 2183 | } |
1b80a9fa | 2184 | |
4390d890 DE |
2185 | static void |
2186 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2187 | { | |
2188 | complaint (&symfile_complaints, | |
2189 | _("macro debug info contains a " | |
2190 | "malformed macro definition:\n`%s'"), | |
2191 | arg1); | |
2192 | } | |
2193 | ||
2194 | static void | |
2195 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2196 | { | |
2197 | complaint (&symfile_complaints, | |
2198 | _("invalid attribute class or form for '%s' in '%s'"), | |
2199 | arg1, arg2); | |
2200 | } | |
527f3840 JK |
2201 | |
2202 | /* Hash function for line_header_hash. */ | |
2203 | ||
2204 | static hashval_t | |
2205 | line_header_hash (const struct line_header *ofs) | |
2206 | { | |
9c541725 | 2207 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2208 | } |
2209 | ||
2210 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2211 | ||
2212 | static hashval_t | |
2213 | line_header_hash_voidp (const void *item) | |
2214 | { | |
9a3c8263 | 2215 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2216 | |
2217 | return line_header_hash (ofs); | |
2218 | } | |
2219 | ||
2220 | /* Equality function for line_header_hash. */ | |
2221 | ||
2222 | static int | |
2223 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2224 | { | |
9a3c8263 SM |
2225 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2226 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2227 | |
9c541725 | 2228 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2229 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2230 | } | |
2231 | ||
4390d890 | 2232 | \f |
9291a0cd | 2233 | |
31aa7e4e JB |
2234 | /* Read the given attribute value as an address, taking the attribute's |
2235 | form into account. */ | |
2236 | ||
2237 | static CORE_ADDR | |
2238 | attr_value_as_address (struct attribute *attr) | |
2239 | { | |
2240 | CORE_ADDR addr; | |
2241 | ||
2242 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2243 | { | |
2244 | /* Aside from a few clearly defined exceptions, attributes that | |
2245 | contain an address must always be in DW_FORM_addr form. | |
2246 | Unfortunately, some compilers happen to be violating this | |
2247 | requirement by encoding addresses using other forms, such | |
2248 | as DW_FORM_data4 for example. For those broken compilers, | |
2249 | we try to do our best, without any guarantee of success, | |
2250 | to interpret the address correctly. It would also be nice | |
2251 | to generate a complaint, but that would require us to maintain | |
2252 | a list of legitimate cases where a non-address form is allowed, | |
2253 | as well as update callers to pass in at least the CU's DWARF | |
2254 | version. This is more overhead than what we're willing to | |
2255 | expand for a pretty rare case. */ | |
2256 | addr = DW_UNSND (attr); | |
2257 | } | |
2258 | else | |
2259 | addr = DW_ADDR (attr); | |
2260 | ||
2261 | return addr; | |
2262 | } | |
2263 | ||
9291a0cd TT |
2264 | /* The suffix for an index file. */ |
2265 | #define INDEX_SUFFIX ".gdb-index" | |
2266 | ||
330cdd98 PA |
2267 | /* See declaration. */ |
2268 | ||
2269 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2270 | const dwarf2_debug_sections *names) | |
2271 | : objfile (objfile_) | |
2272 | { | |
2273 | if (names == NULL) | |
2274 | names = &dwarf2_elf_names; | |
2275 | ||
2276 | bfd *obfd = objfile->obfd; | |
2277 | ||
2278 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2279 | locate_sections (obfd, sec, *names); | |
2280 | } | |
2281 | ||
2282 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2283 | { | |
2284 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2285 | free_cached_comp_units (); | |
2286 | ||
2287 | if (quick_file_names_table) | |
2288 | htab_delete (quick_file_names_table); | |
2289 | ||
2290 | if (line_header_hash) | |
2291 | htab_delete (line_header_hash); | |
2292 | ||
2293 | /* Everything else should be on the objfile obstack. */ | |
2294 | } | |
2295 | ||
2296 | /* See declaration. */ | |
2297 | ||
2298 | void | |
2299 | dwarf2_per_objfile::free_cached_comp_units () | |
2300 | { | |
2301 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2302 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2303 | while (per_cu != NULL) | |
2304 | { | |
2305 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2306 | ||
2307 | free_heap_comp_unit (per_cu->cu); | |
2308 | *last_chain = next_cu; | |
2309 | per_cu = next_cu; | |
2310 | } | |
2311 | } | |
2312 | ||
c906108c | 2313 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2314 | information and return true if we have enough to do something. |
2315 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2316 | ELF names are used. */ | |
c906108c SS |
2317 | |
2318 | int | |
251d32d9 TG |
2319 | dwarf2_has_info (struct objfile *objfile, |
2320 | const struct dwarf2_debug_sections *names) | |
c906108c | 2321 | { |
97cbe998 SDJ |
2322 | if (objfile->flags & OBJF_READNEVER) |
2323 | return 0; | |
2324 | ||
9a3c8263 SM |
2325 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2326 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2327 | if (!dwarf2_per_objfile) |
2328 | { | |
2329 | /* Initialize per-objfile state. */ | |
2330 | struct dwarf2_per_objfile *data | |
8d749320 | 2331 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2332 | |
330cdd98 PA |
2333 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2334 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2335 | } |
73869dc2 | 2336 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2337 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2338 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2339 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2340 | } |
2341 | ||
2342 | /* Return the containing section of virtual section SECTION. */ | |
2343 | ||
2344 | static struct dwarf2_section_info * | |
2345 | get_containing_section (const struct dwarf2_section_info *section) | |
2346 | { | |
2347 | gdb_assert (section->is_virtual); | |
2348 | return section->s.containing_section; | |
c906108c SS |
2349 | } |
2350 | ||
a32a8923 DE |
2351 | /* Return the bfd owner of SECTION. */ |
2352 | ||
2353 | static struct bfd * | |
2354 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2355 | { | |
73869dc2 DE |
2356 | if (section->is_virtual) |
2357 | { | |
2358 | section = get_containing_section (section); | |
2359 | gdb_assert (!section->is_virtual); | |
2360 | } | |
049412e3 | 2361 | return section->s.section->owner; |
a32a8923 DE |
2362 | } |
2363 | ||
2364 | /* Return the bfd section of SECTION. | |
2365 | Returns NULL if the section is not present. */ | |
2366 | ||
2367 | static asection * | |
2368 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2369 | { | |
73869dc2 DE |
2370 | if (section->is_virtual) |
2371 | { | |
2372 | section = get_containing_section (section); | |
2373 | gdb_assert (!section->is_virtual); | |
2374 | } | |
049412e3 | 2375 | return section->s.section; |
a32a8923 DE |
2376 | } |
2377 | ||
2378 | /* Return the name of SECTION. */ | |
2379 | ||
2380 | static const char * | |
2381 | get_section_name (const struct dwarf2_section_info *section) | |
2382 | { | |
2383 | asection *sectp = get_section_bfd_section (section); | |
2384 | ||
2385 | gdb_assert (sectp != NULL); | |
2386 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2387 | } | |
2388 | ||
2389 | /* Return the name of the file SECTION is in. */ | |
2390 | ||
2391 | static const char * | |
2392 | get_section_file_name (const struct dwarf2_section_info *section) | |
2393 | { | |
2394 | bfd *abfd = get_section_bfd_owner (section); | |
2395 | ||
2396 | return bfd_get_filename (abfd); | |
2397 | } | |
2398 | ||
2399 | /* Return the id of SECTION. | |
2400 | Returns 0 if SECTION doesn't exist. */ | |
2401 | ||
2402 | static int | |
2403 | get_section_id (const struct dwarf2_section_info *section) | |
2404 | { | |
2405 | asection *sectp = get_section_bfd_section (section); | |
2406 | ||
2407 | if (sectp == NULL) | |
2408 | return 0; | |
2409 | return sectp->id; | |
2410 | } | |
2411 | ||
2412 | /* Return the flags of SECTION. | |
73869dc2 | 2413 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2414 | |
2415 | static int | |
2416 | get_section_flags (const struct dwarf2_section_info *section) | |
2417 | { | |
2418 | asection *sectp = get_section_bfd_section (section); | |
2419 | ||
2420 | gdb_assert (sectp != NULL); | |
2421 | return bfd_get_section_flags (sectp->owner, sectp); | |
2422 | } | |
2423 | ||
251d32d9 TG |
2424 | /* When loading sections, we look either for uncompressed section or for |
2425 | compressed section names. */ | |
233a11ab CS |
2426 | |
2427 | static int | |
251d32d9 TG |
2428 | section_is_p (const char *section_name, |
2429 | const struct dwarf2_section_names *names) | |
233a11ab | 2430 | { |
251d32d9 TG |
2431 | if (names->normal != NULL |
2432 | && strcmp (section_name, names->normal) == 0) | |
2433 | return 1; | |
2434 | if (names->compressed != NULL | |
2435 | && strcmp (section_name, names->compressed) == 0) | |
2436 | return 1; | |
2437 | return 0; | |
233a11ab CS |
2438 | } |
2439 | ||
330cdd98 | 2440 | /* See declaration. */ |
c906108c | 2441 | |
330cdd98 PA |
2442 | void |
2443 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2444 | const dwarf2_debug_sections &names) | |
c906108c | 2445 | { |
dc7650b8 | 2446 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2447 | |
dc7650b8 JK |
2448 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2449 | { | |
2450 | } | |
330cdd98 | 2451 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2452 | { |
330cdd98 PA |
2453 | this->info.s.section = sectp; |
2454 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2455 | } |
330cdd98 | 2456 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2457 | { |
330cdd98 PA |
2458 | this->abbrev.s.section = sectp; |
2459 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2460 | } |
330cdd98 | 2461 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2462 | { |
330cdd98 PA |
2463 | this->line.s.section = sectp; |
2464 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2465 | } |
330cdd98 | 2466 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2467 | { |
330cdd98 PA |
2468 | this->loc.s.section = sectp; |
2469 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2470 | } |
330cdd98 | 2471 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2472 | { |
330cdd98 PA |
2473 | this->loclists.s.section = sectp; |
2474 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2475 | } |
330cdd98 | 2476 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2477 | { |
330cdd98 PA |
2478 | this->macinfo.s.section = sectp; |
2479 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2480 | } |
330cdd98 | 2481 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2482 | { |
330cdd98 PA |
2483 | this->macro.s.section = sectp; |
2484 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2485 | } |
330cdd98 | 2486 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2487 | { |
330cdd98 PA |
2488 | this->str.s.section = sectp; |
2489 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2490 | } |
330cdd98 | 2491 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2492 | { |
330cdd98 PA |
2493 | this->line_str.s.section = sectp; |
2494 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2495 | } |
330cdd98 | 2496 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2497 | { |
330cdd98 PA |
2498 | this->addr.s.section = sectp; |
2499 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2500 | } |
330cdd98 | 2501 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2502 | { |
330cdd98 PA |
2503 | this->frame.s.section = sectp; |
2504 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2505 | } |
330cdd98 | 2506 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2507 | { |
330cdd98 PA |
2508 | this->eh_frame.s.section = sectp; |
2509 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2510 | } |
330cdd98 | 2511 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2512 | { |
330cdd98 PA |
2513 | this->ranges.s.section = sectp; |
2514 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2515 | } |
330cdd98 | 2516 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2517 | { |
330cdd98 PA |
2518 | this->rnglists.s.section = sectp; |
2519 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2520 | } |
330cdd98 | 2521 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2522 | { |
8b70b953 TT |
2523 | struct dwarf2_section_info type_section; |
2524 | ||
2525 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2526 | type_section.s.section = sectp; |
8b70b953 TT |
2527 | type_section.size = bfd_get_section_size (sectp); |
2528 | ||
330cdd98 | 2529 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2530 | &type_section); |
348e048f | 2531 | } |
330cdd98 | 2532 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2533 | { |
330cdd98 PA |
2534 | this->gdb_index.s.section = sectp; |
2535 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2536 | } |
dce234bc | 2537 | |
b4e1fd61 | 2538 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2539 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2540 | this->has_section_at_zero = true; |
c906108c SS |
2541 | } |
2542 | ||
fceca515 DE |
2543 | /* A helper function that decides whether a section is empty, |
2544 | or not present. */ | |
9e0ac564 TT |
2545 | |
2546 | static int | |
19ac8c2e | 2547 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2548 | { |
73869dc2 DE |
2549 | if (section->is_virtual) |
2550 | return section->size == 0; | |
049412e3 | 2551 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2552 | } |
2553 | ||
3019eac3 DE |
2554 | /* Read the contents of the section INFO. |
2555 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2556 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2557 | of the DWO file. | |
dce234bc | 2558 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2559 | |
dce234bc PP |
2560 | static void |
2561 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2562 | { |
a32a8923 | 2563 | asection *sectp; |
3019eac3 | 2564 | bfd *abfd; |
dce234bc | 2565 | gdb_byte *buf, *retbuf; |
c906108c | 2566 | |
be391dca TT |
2567 | if (info->readin) |
2568 | return; | |
dce234bc | 2569 | info->buffer = NULL; |
be391dca | 2570 | info->readin = 1; |
188dd5d6 | 2571 | |
9e0ac564 | 2572 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2573 | return; |
c906108c | 2574 | |
a32a8923 | 2575 | sectp = get_section_bfd_section (info); |
3019eac3 | 2576 | |
73869dc2 DE |
2577 | /* If this is a virtual section we need to read in the real one first. */ |
2578 | if (info->is_virtual) | |
2579 | { | |
2580 | struct dwarf2_section_info *containing_section = | |
2581 | get_containing_section (info); | |
2582 | ||
2583 | gdb_assert (sectp != NULL); | |
2584 | if ((sectp->flags & SEC_RELOC) != 0) | |
2585 | { | |
2586 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2587 | " supported in section %s [in module %s]"), | |
2588 | get_section_name (info), get_section_file_name (info)); | |
2589 | } | |
2590 | dwarf2_read_section (objfile, containing_section); | |
2591 | /* Other code should have already caught virtual sections that don't | |
2592 | fit. */ | |
2593 | gdb_assert (info->virtual_offset + info->size | |
2594 | <= containing_section->size); | |
2595 | /* If the real section is empty or there was a problem reading the | |
2596 | section we shouldn't get here. */ | |
2597 | gdb_assert (containing_section->buffer != NULL); | |
2598 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2599 | return; | |
2600 | } | |
2601 | ||
4bf44c1c TT |
2602 | /* If the section has relocations, we must read it ourselves. |
2603 | Otherwise we attach it to the BFD. */ | |
2604 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2605 | { |
d521ce57 | 2606 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2607 | return; |
dce234bc | 2608 | } |
dce234bc | 2609 | |
224c3ddb | 2610 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2611 | info->buffer = buf; |
dce234bc PP |
2612 | |
2613 | /* When debugging .o files, we may need to apply relocations; see | |
2614 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2615 | We never compress sections in .o files, so we only need to | |
2616 | try this when the section is not compressed. */ | |
ac8035ab | 2617 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2618 | if (retbuf != NULL) |
2619 | { | |
2620 | info->buffer = retbuf; | |
2621 | return; | |
2622 | } | |
2623 | ||
a32a8923 DE |
2624 | abfd = get_section_bfd_owner (info); |
2625 | gdb_assert (abfd != NULL); | |
2626 | ||
dce234bc PP |
2627 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2628 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2629 | { |
2630 | error (_("Dwarf Error: Can't read DWARF data" | |
2631 | " in section %s [in module %s]"), | |
2632 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2633 | } | |
dce234bc PP |
2634 | } |
2635 | ||
9e0ac564 TT |
2636 | /* A helper function that returns the size of a section in a safe way. |
2637 | If you are positive that the section has been read before using the | |
2638 | size, then it is safe to refer to the dwarf2_section_info object's | |
2639 | "size" field directly. In other cases, you must call this | |
2640 | function, because for compressed sections the size field is not set | |
2641 | correctly until the section has been read. */ | |
2642 | ||
2643 | static bfd_size_type | |
2644 | dwarf2_section_size (struct objfile *objfile, | |
2645 | struct dwarf2_section_info *info) | |
2646 | { | |
2647 | if (!info->readin) | |
2648 | dwarf2_read_section (objfile, info); | |
2649 | return info->size; | |
2650 | } | |
2651 | ||
dce234bc | 2652 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2653 | SECTION_NAME. */ |
af34e669 | 2654 | |
dce234bc | 2655 | void |
3017a003 TG |
2656 | dwarf2_get_section_info (struct objfile *objfile, |
2657 | enum dwarf2_section_enum sect, | |
d521ce57 | 2658 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2659 | bfd_size_type *sizep) |
2660 | { | |
2661 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2662 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2663 | dwarf2_objfile_data_key); | |
dce234bc | 2664 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2665 | |
2666 | /* We may see an objfile without any DWARF, in which case we just | |
2667 | return nothing. */ | |
2668 | if (data == NULL) | |
2669 | { | |
2670 | *sectp = NULL; | |
2671 | *bufp = NULL; | |
2672 | *sizep = 0; | |
2673 | return; | |
2674 | } | |
3017a003 TG |
2675 | switch (sect) |
2676 | { | |
2677 | case DWARF2_DEBUG_FRAME: | |
2678 | info = &data->frame; | |
2679 | break; | |
2680 | case DWARF2_EH_FRAME: | |
2681 | info = &data->eh_frame; | |
2682 | break; | |
2683 | default: | |
2684 | gdb_assert_not_reached ("unexpected section"); | |
2685 | } | |
dce234bc | 2686 | |
9e0ac564 | 2687 | dwarf2_read_section (objfile, info); |
dce234bc | 2688 | |
a32a8923 | 2689 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2690 | *bufp = info->buffer; |
2691 | *sizep = info->size; | |
2692 | } | |
2693 | ||
36586728 TT |
2694 | /* A helper function to find the sections for a .dwz file. */ |
2695 | ||
2696 | static void | |
2697 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2698 | { | |
9a3c8263 | 2699 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2700 | |
2701 | /* Note that we only support the standard ELF names, because .dwz | |
2702 | is ELF-only (at the time of writing). */ | |
2703 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2704 | { | |
049412e3 | 2705 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2706 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2707 | } | |
2708 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2709 | { | |
049412e3 | 2710 | dwz_file->info.s.section = sectp; |
36586728 TT |
2711 | dwz_file->info.size = bfd_get_section_size (sectp); |
2712 | } | |
2713 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2714 | { | |
049412e3 | 2715 | dwz_file->str.s.section = sectp; |
36586728 TT |
2716 | dwz_file->str.size = bfd_get_section_size (sectp); |
2717 | } | |
2718 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2719 | { | |
049412e3 | 2720 | dwz_file->line.s.section = sectp; |
36586728 TT |
2721 | dwz_file->line.size = bfd_get_section_size (sectp); |
2722 | } | |
2723 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2724 | { | |
049412e3 | 2725 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2726 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2727 | } | |
2ec9a5e0 TT |
2728 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2729 | { | |
049412e3 | 2730 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2731 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2732 | } | |
36586728 TT |
2733 | } |
2734 | ||
4db1a1dc TT |
2735 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2736 | there is no .gnu_debugaltlink section in the file. Error if there | |
2737 | is such a section but the file cannot be found. */ | |
36586728 TT |
2738 | |
2739 | static struct dwz_file * | |
2740 | dwarf2_get_dwz_file (void) | |
2741 | { | |
36586728 TT |
2742 | const char *filename; |
2743 | struct dwz_file *result; | |
acd13123 | 2744 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2745 | size_t buildid_len; |
2746 | bfd_byte *buildid; | |
36586728 TT |
2747 | |
2748 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2749 | return dwarf2_per_objfile->dwz_file; | |
2750 | ||
4db1a1dc | 2751 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2752 | gdb::unique_xmalloc_ptr<char> data |
2753 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2754 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2755 | if (data == NULL) |
2756 | { | |
2757 | if (bfd_get_error () == bfd_error_no_error) | |
2758 | return NULL; | |
2759 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2760 | bfd_errmsg (bfd_get_error ())); | |
2761 | } | |
791afaa2 TT |
2762 | |
2763 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2764 | |
acd13123 TT |
2765 | buildid_len = (size_t) buildid_len_arg; |
2766 | ||
791afaa2 | 2767 | filename = data.get (); |
d721ba37 PA |
2768 | |
2769 | std::string abs_storage; | |
36586728 TT |
2770 | if (!IS_ABSOLUTE_PATH (filename)) |
2771 | { | |
14278e1f TT |
2772 | gdb::unique_xmalloc_ptr<char> abs |
2773 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2774 | |
14278e1f | 2775 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2776 | filename = abs_storage.c_str (); |
36586728 TT |
2777 | } |
2778 | ||
dc294be5 TT |
2779 | /* First try the file name given in the section. If that doesn't |
2780 | work, try to use the build-id instead. */ | |
192b62ce | 2781 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2782 | if (dwz_bfd != NULL) |
36586728 | 2783 | { |
192b62ce TT |
2784 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2785 | dwz_bfd.release (); | |
36586728 TT |
2786 | } |
2787 | ||
dc294be5 TT |
2788 | if (dwz_bfd == NULL) |
2789 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2790 | ||
2791 | if (dwz_bfd == NULL) | |
2792 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2793 | objfile_name (dwarf2_per_objfile->objfile)); | |
2794 | ||
36586728 TT |
2795 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2796 | struct dwz_file); | |
192b62ce | 2797 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2798 | |
192b62ce | 2799 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 | 2800 | |
192b62ce | 2801 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2802 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2803 | return result; |
2804 | } | |
9291a0cd | 2805 | \f |
7b9f3c50 DE |
2806 | /* DWARF quick_symbols_functions support. */ |
2807 | ||
2808 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2809 | unique line tables, so we maintain a separate table of all .debug_line | |
2810 | derived entries to support the sharing. | |
2811 | All the quick functions need is the list of file names. We discard the | |
2812 | line_header when we're done and don't need to record it here. */ | |
2813 | struct quick_file_names | |
2814 | { | |
094b34ac DE |
2815 | /* The data used to construct the hash key. */ |
2816 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2817 | |
2818 | /* The number of entries in file_names, real_names. */ | |
2819 | unsigned int num_file_names; | |
2820 | ||
2821 | /* The file names from the line table, after being run through | |
2822 | file_full_name. */ | |
2823 | const char **file_names; | |
2824 | ||
2825 | /* The file names from the line table after being run through | |
2826 | gdb_realpath. These are computed lazily. */ | |
2827 | const char **real_names; | |
2828 | }; | |
2829 | ||
2830 | /* When using the index (and thus not using psymtabs), each CU has an | |
2831 | object of this type. This is used to hold information needed by | |
2832 | the various "quick" methods. */ | |
2833 | struct dwarf2_per_cu_quick_data | |
2834 | { | |
2835 | /* The file table. This can be NULL if there was no file table | |
2836 | or it's currently not read in. | |
2837 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2838 | struct quick_file_names *file_names; | |
2839 | ||
2840 | /* The corresponding symbol table. This is NULL if symbols for this | |
2841 | CU have not yet been read. */ | |
43f3e411 | 2842 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2843 | |
2844 | /* A temporary mark bit used when iterating over all CUs in | |
2845 | expand_symtabs_matching. */ | |
2846 | unsigned int mark : 1; | |
2847 | ||
2848 | /* True if we've tried to read the file table and found there isn't one. | |
2849 | There will be no point in trying to read it again next time. */ | |
2850 | unsigned int no_file_data : 1; | |
2851 | }; | |
2852 | ||
094b34ac DE |
2853 | /* Utility hash function for a stmt_list_hash. */ |
2854 | ||
2855 | static hashval_t | |
2856 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2857 | { | |
2858 | hashval_t v = 0; | |
2859 | ||
2860 | if (stmt_list_hash->dwo_unit != NULL) | |
2861 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2862 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2863 | return v; |
2864 | } | |
2865 | ||
2866 | /* Utility equality function for a stmt_list_hash. */ | |
2867 | ||
2868 | static int | |
2869 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2870 | const struct stmt_list_hash *rhs) | |
2871 | { | |
2872 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2873 | return 0; | |
2874 | if (lhs->dwo_unit != NULL | |
2875 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2876 | return 0; | |
2877 | ||
9c541725 | 2878 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2879 | } |
2880 | ||
7b9f3c50 DE |
2881 | /* Hash function for a quick_file_names. */ |
2882 | ||
2883 | static hashval_t | |
2884 | hash_file_name_entry (const void *e) | |
2885 | { | |
9a3c8263 SM |
2886 | const struct quick_file_names *file_data |
2887 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2888 | |
094b34ac | 2889 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2890 | } |
2891 | ||
2892 | /* Equality function for a quick_file_names. */ | |
2893 | ||
2894 | static int | |
2895 | eq_file_name_entry (const void *a, const void *b) | |
2896 | { | |
9a3c8263 SM |
2897 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2898 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2899 | |
094b34ac | 2900 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2901 | } |
2902 | ||
2903 | /* Delete function for a quick_file_names. */ | |
2904 | ||
2905 | static void | |
2906 | delete_file_name_entry (void *e) | |
2907 | { | |
9a3c8263 | 2908 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2909 | int i; |
2910 | ||
2911 | for (i = 0; i < file_data->num_file_names; ++i) | |
2912 | { | |
2913 | xfree ((void*) file_data->file_names[i]); | |
2914 | if (file_data->real_names) | |
2915 | xfree ((void*) file_data->real_names[i]); | |
2916 | } | |
2917 | ||
2918 | /* The space for the struct itself lives on objfile_obstack, | |
2919 | so we don't free it here. */ | |
2920 | } | |
2921 | ||
2922 | /* Create a quick_file_names hash table. */ | |
2923 | ||
2924 | static htab_t | |
2925 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2926 | { | |
2927 | return htab_create_alloc (nr_initial_entries, | |
2928 | hash_file_name_entry, eq_file_name_entry, | |
2929 | delete_file_name_entry, xcalloc, xfree); | |
2930 | } | |
9291a0cd | 2931 | |
918dd910 JK |
2932 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2933 | have to be created afterwards. You should call age_cached_comp_units after | |
2934 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2935 | ||
2936 | static void | |
2937 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2938 | { | |
3019eac3 | 2939 | if (per_cu->is_debug_types) |
e5fe5e75 | 2940 | load_full_type_unit (per_cu); |
918dd910 | 2941 | else |
95554aad | 2942 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2943 | |
cc12ce38 DE |
2944 | if (per_cu->cu == NULL) |
2945 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2946 | |
2947 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2948 | } |
2949 | ||
a0f42c21 | 2950 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2951 | |
9291a0cd | 2952 | static void |
a0f42c21 | 2953 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2954 | { |
2955 | struct cleanup *back_to; | |
2956 | ||
f4dc4d17 DE |
2957 | /* Skip type_unit_groups, reading the type units they contain |
2958 | is handled elsewhere. */ | |
2959 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2960 | return; | |
2961 | ||
9291a0cd TT |
2962 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2963 | ||
95554aad | 2964 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2965 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2966 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2967 | { | |
2968 | queue_comp_unit (per_cu, language_minimal); | |
2969 | load_cu (per_cu); | |
89e63ee4 DE |
2970 | |
2971 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2972 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2973 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2974 | if (!per_cu->is_debug_types | |
cc12ce38 | 2975 | && per_cu->cu != NULL |
89e63ee4 DE |
2976 | && per_cu->cu->dwo_unit != NULL |
2977 | && dwarf2_per_objfile->index_table != NULL | |
2978 | && dwarf2_per_objfile->index_table->version <= 7 | |
2979 | /* DWP files aren't supported yet. */ | |
2980 | && get_dwp_file () == NULL) | |
2981 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2982 | } |
9291a0cd | 2983 | |
a0f42c21 | 2984 | process_queue (); |
9291a0cd TT |
2985 | |
2986 | /* Age the cache, releasing compilation units that have not | |
2987 | been used recently. */ | |
2988 | age_cached_comp_units (); | |
2989 | ||
2990 | do_cleanups (back_to); | |
2991 | } | |
2992 | ||
2993 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2994 | the objfile from which this CU came. Returns the resulting symbol | |
2995 | table. */ | |
2fdf6df6 | 2996 | |
43f3e411 | 2997 | static struct compunit_symtab * |
a0f42c21 | 2998 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2999 | { |
95554aad | 3000 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 3001 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3002 | { |
3003 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 3004 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 3005 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 3006 | process_cu_includes (); |
9291a0cd TT |
3007 | do_cleanups (back_to); |
3008 | } | |
f194fefb | 3009 | |
43f3e411 | 3010 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
3011 | } |
3012 | ||
8832e7e3 | 3013 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
3014 | |
3015 | This is intended for loops like: | |
3016 | ||
3017 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
3018 | + dwarf2_per_objfile->n_type_units); ++i) | |
3019 | { | |
8832e7e3 | 3020 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
3021 | |
3022 | ...; | |
3023 | } | |
3024 | */ | |
2fdf6df6 | 3025 | |
1fd400ff | 3026 | static struct dwarf2_per_cu_data * |
8832e7e3 | 3027 | dw2_get_cutu (int index) |
1fd400ff TT |
3028 | { |
3029 | if (index >= dwarf2_per_objfile->n_comp_units) | |
3030 | { | |
f4dc4d17 | 3031 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
3032 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
3033 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
3034 | } |
3035 | ||
3036 | return dwarf2_per_objfile->all_comp_units[index]; | |
3037 | } | |
3038 | ||
8832e7e3 DE |
3039 | /* Return the CU given its index. |
3040 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
3041 | refers to a CU. */ | |
f4dc4d17 DE |
3042 | |
3043 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 3044 | dw2_get_cu (int index) |
f4dc4d17 | 3045 | { |
8832e7e3 | 3046 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 3047 | |
1fd400ff TT |
3048 | return dwarf2_per_objfile->all_comp_units[index]; |
3049 | } | |
3050 | ||
2ec9a5e0 TT |
3051 | /* A helper for create_cus_from_index that handles a given list of |
3052 | CUs. */ | |
2fdf6df6 | 3053 | |
74a0d9f6 | 3054 | static void |
2ec9a5e0 TT |
3055 | create_cus_from_index_list (struct objfile *objfile, |
3056 | const gdb_byte *cu_list, offset_type n_elements, | |
3057 | struct dwarf2_section_info *section, | |
3058 | int is_dwz, | |
3059 | int base_offset) | |
9291a0cd TT |
3060 | { |
3061 | offset_type i; | |
9291a0cd | 3062 | |
2ec9a5e0 | 3063 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3064 | { |
74a0d9f6 | 3065 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3066 | |
3067 | sect_offset sect_off | |
3068 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3069 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3070 | cu_list += 2 * 8; |
3071 | ||
9c541725 PA |
3072 | dwarf2_per_cu_data *the_cu |
3073 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3074 | struct dwarf2_per_cu_data); | |
3075 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3076 | the_cu->length = length; |
3077 | the_cu->objfile = objfile; | |
8a0459fd | 3078 | the_cu->section = section; |
9291a0cd TT |
3079 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3080 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3081 | the_cu->is_dwz = is_dwz; |
3082 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3083 | } |
9291a0cd TT |
3084 | } |
3085 | ||
2ec9a5e0 | 3086 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3087 | the CU objects for this objfile. */ |
2ec9a5e0 | 3088 | |
74a0d9f6 | 3089 | static void |
2ec9a5e0 TT |
3090 | create_cus_from_index (struct objfile *objfile, |
3091 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3092 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3093 | { | |
3094 | struct dwz_file *dwz; | |
3095 | ||
3096 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3097 | dwarf2_per_objfile->all_comp_units = |
3098 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3099 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3100 | |
74a0d9f6 JK |
3101 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3102 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3103 | |
3104 | if (dwz_elements == 0) | |
74a0d9f6 | 3105 | return; |
2ec9a5e0 TT |
3106 | |
3107 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3108 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3109 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3110 | } |
3111 | ||
1fd400ff | 3112 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3113 | |
74a0d9f6 | 3114 | static void |
673bfd45 | 3115 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3116 | struct dwarf2_section_info *section, |
673bfd45 DE |
3117 | const gdb_byte *bytes, |
3118 | offset_type elements) | |
1fd400ff TT |
3119 | { |
3120 | offset_type i; | |
673bfd45 | 3121 | htab_t sig_types_hash; |
1fd400ff | 3122 | |
6aa5f3a6 DE |
3123 | dwarf2_per_objfile->n_type_units |
3124 | = dwarf2_per_objfile->n_allocated_type_units | |
3125 | = elements / 3; | |
8d749320 SM |
3126 | dwarf2_per_objfile->all_type_units = |
3127 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3128 | |
673bfd45 | 3129 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3130 | |
3131 | for (i = 0; i < elements; i += 3) | |
3132 | { | |
52dc124a | 3133 | struct signatured_type *sig_type; |
9c541725 | 3134 | ULONGEST signature; |
1fd400ff | 3135 | void **slot; |
9c541725 | 3136 | cu_offset type_offset_in_tu; |
1fd400ff | 3137 | |
74a0d9f6 | 3138 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3139 | sect_offset sect_off |
3140 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3141 | type_offset_in_tu | |
3142 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3143 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3144 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3145 | bytes += 3 * 8; | |
3146 | ||
52dc124a | 3147 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3148 | struct signatured_type); |
52dc124a | 3149 | sig_type->signature = signature; |
9c541725 | 3150 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3151 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3152 | sig_type->per_cu.section = section; |
9c541725 | 3153 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3154 | sig_type->per_cu.objfile = objfile; |
3155 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3156 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3157 | struct dwarf2_per_cu_quick_data); | |
3158 | ||
52dc124a DE |
3159 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3160 | *slot = sig_type; | |
1fd400ff | 3161 | |
b4dd5633 | 3162 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3163 | } |
3164 | ||
673bfd45 | 3165 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3166 | } |
3167 | ||
9291a0cd TT |
3168 | /* Read the address map data from the mapped index, and use it to |
3169 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3170 | |
9291a0cd TT |
3171 | static void |
3172 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3173 | { | |
3e29f34a | 3174 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3175 | const gdb_byte *iter, *end; |
9291a0cd | 3176 | struct addrmap *mutable_map; |
9291a0cd TT |
3177 | CORE_ADDR baseaddr; |
3178 | ||
8268c778 PA |
3179 | auto_obstack temp_obstack; |
3180 | ||
9291a0cd TT |
3181 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3182 | ||
3183 | iter = index->address_table; | |
3184 | end = iter + index->address_table_size; | |
3185 | ||
3186 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3187 | ||
3188 | while (iter < end) | |
3189 | { | |
3190 | ULONGEST hi, lo, cu_index; | |
3191 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3192 | iter += 8; | |
3193 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3194 | iter += 8; | |
3195 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3196 | iter += 4; | |
f652bce2 | 3197 | |
24a55014 | 3198 | if (lo > hi) |
f652bce2 | 3199 | { |
24a55014 DE |
3200 | complaint (&symfile_complaints, |
3201 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3202 | hex_string (lo), hex_string (hi)); |
24a55014 | 3203 | continue; |
f652bce2 | 3204 | } |
24a55014 DE |
3205 | |
3206 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3207 | { |
3208 | complaint (&symfile_complaints, | |
3209 | _(".gdb_index address table has invalid CU number %u"), | |
3210 | (unsigned) cu_index); | |
24a55014 | 3211 | continue; |
f652bce2 | 3212 | } |
24a55014 | 3213 | |
3e29f34a MR |
3214 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3215 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3216 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3217 | } |
3218 | ||
3219 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3220 | &objfile->objfile_obstack); | |
9291a0cd TT |
3221 | } |
3222 | ||
59d7bcaf JK |
3223 | /* The hash function for strings in the mapped index. This is the same as |
3224 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3225 | implementation. This is necessary because the hash function is tied to the | |
3226 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3227 | SYMBOL_HASH_NEXT. |
3228 | ||
3229 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3230 | |
9291a0cd | 3231 | static hashval_t |
559a7a62 | 3232 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3233 | { |
3234 | const unsigned char *str = (const unsigned char *) p; | |
3235 | hashval_t r = 0; | |
3236 | unsigned char c; | |
3237 | ||
3238 | while ((c = *str++) != 0) | |
559a7a62 JK |
3239 | { |
3240 | if (index_version >= 5) | |
3241 | c = tolower (c); | |
3242 | r = r * 67 + c - 113; | |
3243 | } | |
9291a0cd TT |
3244 | |
3245 | return r; | |
3246 | } | |
3247 | ||
3248 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3249 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3250 | constant pool and return true. If NAME cannot be found, return |
3251 | false. */ | |
2fdf6df6 | 3252 | |
109483d9 | 3253 | static bool |
9291a0cd TT |
3254 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3255 | offset_type **vec_out) | |
3256 | { | |
0cf03b49 | 3257 | offset_type hash; |
9291a0cd | 3258 | offset_type slot, step; |
559a7a62 | 3259 | int (*cmp) (const char *, const char *); |
9291a0cd | 3260 | |
791afaa2 | 3261 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3262 | if (current_language->la_language == language_cplus |
45280282 IB |
3263 | || current_language->la_language == language_fortran |
3264 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3265 | { |
3266 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3267 | not contain any. */ | |
a8719064 | 3268 | |
72998fb3 | 3269 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3270 | { |
109483d9 | 3271 | without_params = cp_remove_params (name); |
0cf03b49 | 3272 | |
72998fb3 | 3273 | if (without_params != NULL) |
791afaa2 | 3274 | name = without_params.get (); |
0cf03b49 JK |
3275 | } |
3276 | } | |
3277 | ||
559a7a62 | 3278 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3279 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3280 | simulate our NAME being searched is also lowercased. */ |
3281 | hash = mapped_index_string_hash ((index->version == 4 | |
3282 | && case_sensitivity == case_sensitive_off | |
3283 | ? 5 : index->version), | |
3284 | name); | |
3285 | ||
3876f04e DE |
3286 | slot = hash & (index->symbol_table_slots - 1); |
3287 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3288 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3289 | |
3290 | for (;;) | |
3291 | { | |
3292 | /* Convert a slot number to an offset into the table. */ | |
3293 | offset_type i = 2 * slot; | |
3294 | const char *str; | |
3876f04e | 3295 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
109483d9 | 3296 | return false; |
9291a0cd | 3297 | |
3876f04e | 3298 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3299 | if (!cmp (name, str)) |
9291a0cd TT |
3300 | { |
3301 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3302 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
109483d9 | 3303 | return true; |
9291a0cd TT |
3304 | } |
3305 | ||
3876f04e | 3306 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3307 | } |
3308 | } | |
3309 | ||
2ec9a5e0 TT |
3310 | /* A helper function that reads the .gdb_index from SECTION and fills |
3311 | in MAP. FILENAME is the name of the file containing the section; | |
3312 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3313 | ok to use deprecated sections. | |
3314 | ||
3315 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3316 | out parameters that are filled in with information about the CU and | |
3317 | TU lists in the section. | |
3318 | ||
3319 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3320 | |
9291a0cd | 3321 | static int |
2ec9a5e0 TT |
3322 | read_index_from_section (struct objfile *objfile, |
3323 | const char *filename, | |
3324 | int deprecated_ok, | |
3325 | struct dwarf2_section_info *section, | |
3326 | struct mapped_index *map, | |
3327 | const gdb_byte **cu_list, | |
3328 | offset_type *cu_list_elements, | |
3329 | const gdb_byte **types_list, | |
3330 | offset_type *types_list_elements) | |
9291a0cd | 3331 | { |
948f8e3d | 3332 | const gdb_byte *addr; |
2ec9a5e0 | 3333 | offset_type version; |
b3b272e1 | 3334 | offset_type *metadata; |
1fd400ff | 3335 | int i; |
9291a0cd | 3336 | |
2ec9a5e0 | 3337 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3338 | return 0; |
82430852 JK |
3339 | |
3340 | /* Older elfutils strip versions could keep the section in the main | |
3341 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3342 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3343 | return 0; |
3344 | ||
2ec9a5e0 | 3345 | dwarf2_read_section (objfile, section); |
9291a0cd | 3346 | |
2ec9a5e0 | 3347 | addr = section->buffer; |
9291a0cd | 3348 | /* Version check. */ |
1fd400ff | 3349 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3350 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3351 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3352 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3353 | indices. */ |
831adc1f | 3354 | if (version < 4) |
481860b3 GB |
3355 | { |
3356 | static int warning_printed = 0; | |
3357 | if (!warning_printed) | |
3358 | { | |
3359 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3360 | filename); |
481860b3 GB |
3361 | warning_printed = 1; |
3362 | } | |
3363 | return 0; | |
3364 | } | |
3365 | /* Index version 4 uses a different hash function than index version | |
3366 | 5 and later. | |
3367 | ||
3368 | Versions earlier than 6 did not emit psymbols for inlined | |
3369 | functions. Using these files will cause GDB not to be able to | |
3370 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3371 | indices unless the user has done |
3372 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3373 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3374 | { |
3375 | static int warning_printed = 0; | |
3376 | if (!warning_printed) | |
3377 | { | |
e615022a DE |
3378 | warning (_("\ |
3379 | Skipping deprecated .gdb_index section in %s.\n\ | |
3380 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3381 | to use the section anyway."), | |
2ec9a5e0 | 3382 | filename); |
481860b3 GB |
3383 | warning_printed = 1; |
3384 | } | |
3385 | return 0; | |
3386 | } | |
796a7ff8 | 3387 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3388 | of the TU (for symbols coming from TUs), |
3389 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3390 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3391 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3392 | These are just performance bugs, and we can't distinguish gdb-generated | |
3393 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3394 | |
481860b3 | 3395 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3396 | longer backward compatible. */ |
796a7ff8 | 3397 | if (version > 8) |
594e8718 | 3398 | return 0; |
9291a0cd | 3399 | |
559a7a62 | 3400 | map->version = version; |
2ec9a5e0 | 3401 | map->total_size = section->size; |
9291a0cd TT |
3402 | |
3403 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3404 | |
3405 | i = 0; | |
2ec9a5e0 TT |
3406 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3407 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3408 | / 8); | |
1fd400ff TT |
3409 | ++i; |
3410 | ||
2ec9a5e0 TT |
3411 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3412 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3413 | - MAYBE_SWAP (metadata[i])) | |
3414 | / 8); | |
987d643c | 3415 | ++i; |
1fd400ff TT |
3416 | |
3417 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3418 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3419 | - MAYBE_SWAP (metadata[i])); | |
3420 | ++i; | |
3421 | ||
3876f04e DE |
3422 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3423 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3424 | - MAYBE_SWAP (metadata[i])) | |
3425 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3426 | ++i; |
9291a0cd | 3427 | |
f9d83a0b | 3428 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3429 | |
2ec9a5e0 TT |
3430 | return 1; |
3431 | } | |
3432 | ||
3433 | ||
3434 | /* Read the index file. If everything went ok, initialize the "quick" | |
3435 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3436 | ||
3437 | static int | |
3438 | dwarf2_read_index (struct objfile *objfile) | |
3439 | { | |
3440 | struct mapped_index local_map, *map; | |
3441 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3442 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3443 | struct dwz_file *dwz; |
2ec9a5e0 | 3444 | |
4262abfb | 3445 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3446 | use_deprecated_index_sections, |
3447 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3448 | &cu_list, &cu_list_elements, | |
3449 | &types_list, &types_list_elements)) | |
3450 | return 0; | |
3451 | ||
0fefef59 | 3452 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3453 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3454 | return 0; |
3455 | ||
2ec9a5e0 TT |
3456 | /* If there is a .dwz file, read it so we can get its CU list as |
3457 | well. */ | |
4db1a1dc TT |
3458 | dwz = dwarf2_get_dwz_file (); |
3459 | if (dwz != NULL) | |
2ec9a5e0 | 3460 | { |
2ec9a5e0 TT |
3461 | struct mapped_index dwz_map; |
3462 | const gdb_byte *dwz_types_ignore; | |
3463 | offset_type dwz_types_elements_ignore; | |
3464 | ||
3465 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3466 | 1, | |
3467 | &dwz->gdb_index, &dwz_map, | |
3468 | &dwz_list, &dwz_list_elements, | |
3469 | &dwz_types_ignore, | |
3470 | &dwz_types_elements_ignore)) | |
3471 | { | |
3472 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3473 | bfd_get_filename (dwz->dwz_bfd)); | |
3474 | return 0; | |
3475 | } | |
3476 | } | |
3477 | ||
74a0d9f6 JK |
3478 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3479 | dwz_list_elements); | |
1fd400ff | 3480 | |
8b70b953 TT |
3481 | if (types_list_elements) |
3482 | { | |
3483 | struct dwarf2_section_info *section; | |
3484 | ||
3485 | /* We can only handle a single .debug_types when we have an | |
3486 | index. */ | |
3487 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3488 | return 0; | |
3489 | ||
3490 | section = VEC_index (dwarf2_section_info_def, | |
3491 | dwarf2_per_objfile->types, 0); | |
3492 | ||
74a0d9f6 JK |
3493 | create_signatured_type_table_from_index (objfile, section, types_list, |
3494 | types_list_elements); | |
8b70b953 | 3495 | } |
9291a0cd | 3496 | |
2ec9a5e0 TT |
3497 | create_addrmap_from_index (objfile, &local_map); |
3498 | ||
8d749320 | 3499 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
3f563c84 | 3500 | map = new (map) mapped_index (); |
2ec9a5e0 | 3501 | *map = local_map; |
9291a0cd TT |
3502 | |
3503 | dwarf2_per_objfile->index_table = map; | |
3504 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3505 | dwarf2_per_objfile->quick_file_names_table = |
3506 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3507 | |
3508 | return 1; | |
3509 | } | |
3510 | ||
3511 | /* A helper for the "quick" functions which sets the global | |
3512 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3513 | |
9291a0cd TT |
3514 | static void |
3515 | dw2_setup (struct objfile *objfile) | |
3516 | { | |
9a3c8263 SM |
3517 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3518 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3519 | gdb_assert (dwarf2_per_objfile); |
3520 | } | |
3521 | ||
dee91e82 | 3522 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3523 | |
dee91e82 DE |
3524 | static void |
3525 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3526 | const gdb_byte *info_ptr, |
dee91e82 DE |
3527 | struct die_info *comp_unit_die, |
3528 | int has_children, | |
3529 | void *data) | |
9291a0cd | 3530 | { |
dee91e82 DE |
3531 | struct dwarf2_cu *cu = reader->cu; |
3532 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3533 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3534 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3535 | struct attribute *attr; |
dee91e82 | 3536 | int i; |
7b9f3c50 DE |
3537 | void **slot; |
3538 | struct quick_file_names *qfn; | |
9291a0cd | 3539 | |
0186c6a7 DE |
3540 | gdb_assert (! this_cu->is_debug_types); |
3541 | ||
07261596 TT |
3542 | /* Our callers never want to match partial units -- instead they |
3543 | will match the enclosing full CU. */ | |
3544 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3545 | { | |
3546 | this_cu->v.quick->no_file_data = 1; | |
3547 | return; | |
3548 | } | |
3549 | ||
0186c6a7 | 3550 | lh_cu = this_cu; |
7b9f3c50 | 3551 | slot = NULL; |
dee91e82 | 3552 | |
fff8551c | 3553 | line_header_up lh; |
9c541725 | 3554 | sect_offset line_offset {}; |
fff8551c | 3555 | |
dee91e82 | 3556 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3557 | if (attr) |
3558 | { | |
7b9f3c50 DE |
3559 | struct quick_file_names find_entry; |
3560 | ||
9c541725 | 3561 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3562 | |
3563 | /* We may have already read in this line header (TU line header sharing). | |
3564 | If we have we're done. */ | |
094b34ac | 3565 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3566 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3567 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3568 | &find_entry, INSERT); | |
3569 | if (*slot != NULL) | |
3570 | { | |
9a3c8263 | 3571 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3572 | return; |
7b9f3c50 DE |
3573 | } |
3574 | ||
3019eac3 | 3575 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3576 | } |
3577 | if (lh == NULL) | |
3578 | { | |
094b34ac | 3579 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3580 | return; |
9291a0cd TT |
3581 | } |
3582 | ||
8d749320 | 3583 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3584 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3585 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3586 | gdb_assert (slot != NULL); |
3587 | *slot = qfn; | |
9291a0cd | 3588 | |
d721ba37 | 3589 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3590 | |
fff8551c | 3591 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3592 | qfn->file_names = |
fff8551c PA |
3593 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3594 | for (i = 0; i < lh->file_names.size (); ++i) | |
3595 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3596 | qfn->real_names = NULL; |
9291a0cd | 3597 | |
094b34ac | 3598 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3599 | } |
3600 | ||
3601 | /* A helper for the "quick" functions which attempts to read the line | |
3602 | table for THIS_CU. */ | |
3603 | ||
3604 | static struct quick_file_names * | |
e4a48d9d | 3605 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3606 | { |
0186c6a7 DE |
3607 | /* This should never be called for TUs. */ |
3608 | gdb_assert (! this_cu->is_debug_types); | |
3609 | /* Nor type unit groups. */ | |
3610 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3611 | |
dee91e82 DE |
3612 | if (this_cu->v.quick->file_names != NULL) |
3613 | return this_cu->v.quick->file_names; | |
3614 | /* If we know there is no line data, no point in looking again. */ | |
3615 | if (this_cu->v.quick->no_file_data) | |
3616 | return NULL; | |
3617 | ||
0186c6a7 | 3618 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3619 | |
3620 | if (this_cu->v.quick->no_file_data) | |
3621 | return NULL; | |
3622 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3623 | } |
3624 | ||
3625 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3626 | real path for a given file name from the line table. */ |
2fdf6df6 | 3627 | |
9291a0cd | 3628 | static const char * |
7b9f3c50 DE |
3629 | dw2_get_real_path (struct objfile *objfile, |
3630 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3631 | { |
7b9f3c50 DE |
3632 | if (qfn->real_names == NULL) |
3633 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3634 | qfn->num_file_names, const char *); |
9291a0cd | 3635 | |
7b9f3c50 | 3636 | if (qfn->real_names[index] == NULL) |
14278e1f | 3637 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3638 | |
7b9f3c50 | 3639 | return qfn->real_names[index]; |
9291a0cd TT |
3640 | } |
3641 | ||
3642 | static struct symtab * | |
3643 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3644 | { | |
43f3e411 | 3645 | struct compunit_symtab *cust; |
9291a0cd | 3646 | int index; |
ae2de4f8 | 3647 | |
9291a0cd TT |
3648 | dw2_setup (objfile); |
3649 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3650 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3651 | if (cust == NULL) | |
3652 | return NULL; | |
3653 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3654 | } |
3655 | ||
7b9f3c50 DE |
3656 | /* Traversal function for dw2_forget_cached_source_info. */ |
3657 | ||
3658 | static int | |
3659 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3660 | { |
7b9f3c50 | 3661 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3662 | |
7b9f3c50 | 3663 | if (file_data->real_names) |
9291a0cd | 3664 | { |
7b9f3c50 | 3665 | int i; |
9291a0cd | 3666 | |
7b9f3c50 | 3667 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3668 | { |
7b9f3c50 DE |
3669 | xfree ((void*) file_data->real_names[i]); |
3670 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3671 | } |
3672 | } | |
7b9f3c50 DE |
3673 | |
3674 | return 1; | |
3675 | } | |
3676 | ||
3677 | static void | |
3678 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3679 | { | |
3680 | dw2_setup (objfile); | |
3681 | ||
3682 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3683 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3684 | } |
3685 | ||
f8eba3c6 TT |
3686 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3687 | the symtabs and calls the iterator. */ | |
3688 | ||
3689 | static int | |
3690 | dw2_map_expand_apply (struct objfile *objfile, | |
3691 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3692 | const char *name, const char *real_path, |
14bc53a8 | 3693 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3694 | { |
43f3e411 | 3695 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3696 | |
3697 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3698 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3699 | return 0; |
3700 | ||
3701 | /* This may expand more than one symtab, and we want to iterate over | |
3702 | all of them. */ | |
a0f42c21 | 3703 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3704 | |
14bc53a8 PA |
3705 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3706 | last_made, callback); | |
f8eba3c6 TT |
3707 | } |
3708 | ||
3709 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3710 | ||
14bc53a8 PA |
3711 | static bool |
3712 | dw2_map_symtabs_matching_filename | |
3713 | (struct objfile *objfile, const char *name, const char *real_path, | |
3714 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3715 | { |
3716 | int i; | |
c011a4f4 | 3717 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3718 | |
3719 | dw2_setup (objfile); | |
ae2de4f8 | 3720 | |
848e3e78 DE |
3721 | /* The rule is CUs specify all the files, including those used by |
3722 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3723 | |
848e3e78 | 3724 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3725 | { |
3726 | int j; | |
8832e7e3 | 3727 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3728 | struct quick_file_names *file_data; |
9291a0cd | 3729 | |
3d7bb9d9 | 3730 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3731 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3732 | continue; |
3733 | ||
e4a48d9d | 3734 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3735 | if (file_data == NULL) |
9291a0cd TT |
3736 | continue; |
3737 | ||
7b9f3c50 | 3738 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3739 | { |
7b9f3c50 | 3740 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3741 | const char *this_real_name; |
9291a0cd | 3742 | |
af529f8f | 3743 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3744 | { |
f5b95b50 | 3745 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3746 | callback)) |
3747 | return true; | |
288e77a7 | 3748 | continue; |
4aac40c8 | 3749 | } |
9291a0cd | 3750 | |
c011a4f4 DE |
3751 | /* Before we invoke realpath, which can get expensive when many |
3752 | files are involved, do a quick comparison of the basenames. */ | |
3753 | if (! basenames_may_differ | |
3754 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3755 | continue; | |
3756 | ||
da235a7c JK |
3757 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3758 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3759 | { |
da235a7c | 3760 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3761 | callback)) |
3762 | return true; | |
288e77a7 | 3763 | continue; |
da235a7c | 3764 | } |
9291a0cd | 3765 | |
da235a7c JK |
3766 | if (real_path != NULL) |
3767 | { | |
af529f8f JK |
3768 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3769 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3770 | if (this_real_name != NULL |
af529f8f | 3771 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3772 | { |
f5b95b50 | 3773 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3774 | callback)) |
3775 | return true; | |
288e77a7 | 3776 | continue; |
9291a0cd TT |
3777 | } |
3778 | } | |
3779 | } | |
3780 | } | |
3781 | ||
14bc53a8 | 3782 | return false; |
9291a0cd TT |
3783 | } |
3784 | ||
da51c347 DE |
3785 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3786 | ||
3787 | struct dw2_symtab_iterator | |
9291a0cd | 3788 | { |
da51c347 DE |
3789 | /* The internalized form of .gdb_index. */ |
3790 | struct mapped_index *index; | |
3791 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3792 | int want_specific_block; | |
3793 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3794 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3795 | int block_index; | |
3796 | /* The kind of symbol we're looking for. */ | |
3797 | domain_enum domain; | |
3798 | /* The list of CUs from the index entry of the symbol, | |
3799 | or NULL if not found. */ | |
3800 | offset_type *vec; | |
3801 | /* The next element in VEC to look at. */ | |
3802 | int next; | |
3803 | /* The number of elements in VEC, or zero if there is no match. */ | |
3804 | int length; | |
8943b874 DE |
3805 | /* Have we seen a global version of the symbol? |
3806 | If so we can ignore all further global instances. | |
3807 | This is to work around gold/15646, inefficient gold-generated | |
3808 | indices. */ | |
3809 | int global_seen; | |
da51c347 | 3810 | }; |
9291a0cd | 3811 | |
da51c347 DE |
3812 | /* Initialize the index symtab iterator ITER. |
3813 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3814 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3815 | |
9291a0cd | 3816 | static void |
da51c347 DE |
3817 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3818 | struct mapped_index *index, | |
3819 | int want_specific_block, | |
3820 | int block_index, | |
3821 | domain_enum domain, | |
3822 | const char *name) | |
3823 | { | |
3824 | iter->index = index; | |
3825 | iter->want_specific_block = want_specific_block; | |
3826 | iter->block_index = block_index; | |
3827 | iter->domain = domain; | |
3828 | iter->next = 0; | |
8943b874 | 3829 | iter->global_seen = 0; |
da51c347 DE |
3830 | |
3831 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3832 | iter->length = MAYBE_SWAP (*iter->vec); | |
3833 | else | |
3834 | { | |
3835 | iter->vec = NULL; | |
3836 | iter->length = 0; | |
3837 | } | |
3838 | } | |
3839 | ||
3840 | /* Return the next matching CU or NULL if there are no more. */ | |
3841 | ||
3842 | static struct dwarf2_per_cu_data * | |
3843 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3844 | { | |
3845 | for ( ; iter->next < iter->length; ++iter->next) | |
3846 | { | |
3847 | offset_type cu_index_and_attrs = | |
3848 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3849 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3850 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3851 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3852 | /* This value is only valid for index versions >= 7. */ | |
3853 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3854 | gdb_index_symbol_kind symbol_kind = | |
3855 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3856 | /* Only check the symbol attributes if they're present. | |
3857 | Indices prior to version 7 don't record them, | |
3858 | and indices >= 7 may elide them for certain symbols | |
3859 | (gold does this). */ | |
3860 | int attrs_valid = | |
3861 | (iter->index->version >= 7 | |
3862 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3863 | ||
3190f0c6 DE |
3864 | /* Don't crash on bad data. */ |
3865 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3866 | + dwarf2_per_objfile->n_type_units)) | |
3867 | { | |
3868 | complaint (&symfile_complaints, | |
3869 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3870 | " [in module %s]"), |
3871 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3872 | continue; |
3873 | } | |
3874 | ||
8832e7e3 | 3875 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3876 | |
da51c347 | 3877 | /* Skip if already read in. */ |
43f3e411 | 3878 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3879 | continue; |
3880 | ||
8943b874 DE |
3881 | /* Check static vs global. */ |
3882 | if (attrs_valid) | |
3883 | { | |
3884 | if (iter->want_specific_block | |
3885 | && want_static != is_static) | |
3886 | continue; | |
3887 | /* Work around gold/15646. */ | |
3888 | if (!is_static && iter->global_seen) | |
3889 | continue; | |
3890 | if (!is_static) | |
3891 | iter->global_seen = 1; | |
3892 | } | |
da51c347 DE |
3893 | |
3894 | /* Only check the symbol's kind if it has one. */ | |
3895 | if (attrs_valid) | |
3896 | { | |
3897 | switch (iter->domain) | |
3898 | { | |
3899 | case VAR_DOMAIN: | |
3900 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3901 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3902 | /* Some types are also in VAR_DOMAIN. */ | |
3903 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3904 | continue; | |
3905 | break; | |
3906 | case STRUCT_DOMAIN: | |
3907 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3908 | continue; | |
3909 | break; | |
3910 | case LABEL_DOMAIN: | |
3911 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3912 | continue; | |
3913 | break; | |
3914 | default: | |
3915 | break; | |
3916 | } | |
3917 | } | |
3918 | ||
3919 | ++iter->next; | |
3920 | return per_cu; | |
3921 | } | |
3922 | ||
3923 | return NULL; | |
3924 | } | |
3925 | ||
43f3e411 | 3926 | static struct compunit_symtab * |
da51c347 DE |
3927 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3928 | const char *name, domain_enum domain) | |
9291a0cd | 3929 | { |
43f3e411 | 3930 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3931 | struct mapped_index *index; |
3932 | ||
9291a0cd TT |
3933 | dw2_setup (objfile); |
3934 | ||
b5ec771e PA |
3935 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3936 | ||
156942c7 DE |
3937 | index = dwarf2_per_objfile->index_table; |
3938 | ||
da51c347 | 3939 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3940 | if (index) |
9291a0cd | 3941 | { |
da51c347 DE |
3942 | struct dw2_symtab_iterator iter; |
3943 | struct dwarf2_per_cu_data *per_cu; | |
3944 | ||
3945 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3946 | |
da51c347 | 3947 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3948 | { |
b2e2f908 | 3949 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3950 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3951 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3952 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3953 | |
b2e2f908 DE |
3954 | sym = block_find_symbol (block, name, domain, |
3955 | block_find_non_opaque_type_preferred, | |
3956 | &with_opaque); | |
3957 | ||
da51c347 DE |
3958 | /* Some caution must be observed with overloaded functions |
3959 | and methods, since the index will not contain any overload | |
3960 | information (but NAME might contain it). */ | |
da51c347 | 3961 | |
b2e2f908 | 3962 | if (sym != NULL |
b5ec771e | 3963 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
b2e2f908 DE |
3964 | return stab; |
3965 | if (with_opaque != NULL | |
b5ec771e | 3966 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
b2e2f908 | 3967 | stab_best = stab; |
da51c347 DE |
3968 | |
3969 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3970 | } |
3971 | } | |
9291a0cd | 3972 | |
da51c347 | 3973 | return stab_best; |
9291a0cd TT |
3974 | } |
3975 | ||
3976 | static void | |
3977 | dw2_print_stats (struct objfile *objfile) | |
3978 | { | |
e4a48d9d | 3979 | int i, total, count; |
9291a0cd TT |
3980 | |
3981 | dw2_setup (objfile); | |
e4a48d9d | 3982 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3983 | count = 0; |
e4a48d9d | 3984 | for (i = 0; i < total; ++i) |
9291a0cd | 3985 | { |
8832e7e3 | 3986 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3987 | |
43f3e411 | 3988 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3989 | ++count; |
3990 | } | |
e4a48d9d | 3991 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3992 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3993 | } | |
3994 | ||
779bd270 DE |
3995 | /* This dumps minimal information about the index. |
3996 | It is called via "mt print objfiles". | |
3997 | One use is to verify .gdb_index has been loaded by the | |
3998 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3999 | ||
9291a0cd TT |
4000 | static void |
4001 | dw2_dump (struct objfile *objfile) | |
4002 | { | |
779bd270 DE |
4003 | dw2_setup (objfile); |
4004 | gdb_assert (dwarf2_per_objfile->using_index); | |
4005 | printf_filtered (".gdb_index:"); | |
4006 | if (dwarf2_per_objfile->index_table != NULL) | |
4007 | { | |
4008 | printf_filtered (" version %d\n", | |
4009 | dwarf2_per_objfile->index_table->version); | |
4010 | } | |
4011 | else | |
4012 | printf_filtered (" faked for \"readnow\"\n"); | |
4013 | printf_filtered ("\n"); | |
9291a0cd TT |
4014 | } |
4015 | ||
4016 | static void | |
3189cb12 DE |
4017 | dw2_relocate (struct objfile *objfile, |
4018 | const struct section_offsets *new_offsets, | |
4019 | const struct section_offsets *delta) | |
9291a0cd TT |
4020 | { |
4021 | /* There's nothing to relocate here. */ | |
4022 | } | |
4023 | ||
4024 | static void | |
4025 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4026 | const char *func_name) | |
4027 | { | |
da51c347 DE |
4028 | struct mapped_index *index; |
4029 | ||
4030 | dw2_setup (objfile); | |
4031 | ||
4032 | index = dwarf2_per_objfile->index_table; | |
4033 | ||
4034 | /* index is NULL if OBJF_READNOW. */ | |
4035 | if (index) | |
4036 | { | |
4037 | struct dw2_symtab_iterator iter; | |
4038 | struct dwarf2_per_cu_data *per_cu; | |
4039 | ||
4040 | /* Note: It doesn't matter what we pass for block_index here. */ | |
4041 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
4042 | func_name); | |
4043 | ||
4044 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
4045 | dw2_instantiate_symtab (per_cu); | |
4046 | } | |
9291a0cd TT |
4047 | } |
4048 | ||
4049 | static void | |
4050 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4051 | { | |
4052 | int i; | |
4053 | ||
4054 | dw2_setup (objfile); | |
1fd400ff TT |
4055 | |
4056 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4057 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4058 | { |
8832e7e3 | 4059 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4060 | |
a0f42c21 | 4061 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4062 | } |
4063 | } | |
4064 | ||
4065 | static void | |
652a8996 JK |
4066 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4067 | const char *fullname) | |
9291a0cd TT |
4068 | { |
4069 | int i; | |
4070 | ||
4071 | dw2_setup (objfile); | |
d4637a04 DE |
4072 | |
4073 | /* We don't need to consider type units here. | |
4074 | This is only called for examining code, e.g. expand_line_sal. | |
4075 | There can be an order of magnitude (or more) more type units | |
4076 | than comp units, and we avoid them if we can. */ | |
4077 | ||
4078 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4079 | { |
4080 | int j; | |
8832e7e3 | 4081 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4082 | struct quick_file_names *file_data; |
9291a0cd | 4083 | |
3d7bb9d9 | 4084 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4085 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4086 | continue; |
4087 | ||
e4a48d9d | 4088 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4089 | if (file_data == NULL) |
9291a0cd TT |
4090 | continue; |
4091 | ||
7b9f3c50 | 4092 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4093 | { |
652a8996 JK |
4094 | const char *this_fullname = file_data->file_names[j]; |
4095 | ||
4096 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4097 | { |
a0f42c21 | 4098 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4099 | break; |
4100 | } | |
4101 | } | |
4102 | } | |
4103 | } | |
4104 | ||
9291a0cd | 4105 | static void |
ade7ed9e | 4106 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4107 | const char * name, domain_enum domain, |
ade7ed9e | 4108 | int global, |
40658b94 PH |
4109 | int (*callback) (struct block *, |
4110 | struct symbol *, void *), | |
b5ec771e | 4111 | void *data, symbol_name_match_type match, |
2edb89d3 | 4112 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4113 | { |
40658b94 | 4114 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4115 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4116 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4117 | } |
4118 | ||
b5ec771e PA |
4119 | /* Symbol name matcher for .gdb_index names. |
4120 | ||
4121 | Symbol names in .gdb_index have a few particularities: | |
4122 | ||
4123 | - There's no indication of which is the language of each symbol. | |
4124 | ||
4125 | Since each language has its own symbol name matching algorithm, | |
4126 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4127 | each symbol against all languages. This would be a potential |
4128 | performance problem if it were not mitigated by the | |
4129 | mapped_index::name_components lookup table, which significantly | |
4130 | reduces the number of times we need to call into this matcher, | |
4131 | making it a non-issue. | |
b5ec771e PA |
4132 | |
4133 | - Symbol names in the index have no overload (parameter) | |
4134 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4135 | appear as "foo" in the index, for example. | |
4136 | ||
4137 | This means that the lookup names passed to the symbol name | |
4138 | matcher functions must have no parameter information either | |
4139 | because (e.g.) symbol search name "foo" does not match | |
4140 | lookup-name "foo(int)" [while swapping search name for lookup | |
4141 | name would match]. | |
4142 | */ | |
4143 | class gdb_index_symbol_name_matcher | |
4144 | { | |
4145 | public: | |
4146 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4147 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4148 | ||
4149 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4150 | Returns true if any matcher matches. */ | |
4151 | bool matches (const char *symbol_name); | |
4152 | ||
4153 | private: | |
4154 | /* A reference to the lookup name we're matching against. */ | |
4155 | const lookup_name_info &m_lookup_name; | |
4156 | ||
4157 | /* A vector holding all the different symbol name matchers, for all | |
4158 | languages. */ | |
4159 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4160 | }; | |
4161 | ||
4162 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4163 | (const lookup_name_info &lookup_name) | |
4164 | : m_lookup_name (lookup_name) | |
4165 | { | |
4166 | /* Prepare the vector of comparison functions upfront, to avoid | |
4167 | doing the same work for each symbol. Care is taken to avoid | |
4168 | matching with the same matcher more than once if/when multiple | |
4169 | languages use the same matcher function. */ | |
4170 | auto &matchers = m_symbol_name_matcher_funcs; | |
4171 | matchers.reserve (nr_languages); | |
4172 | ||
4173 | matchers.push_back (default_symbol_name_matcher); | |
4174 | ||
4175 | for (int i = 0; i < nr_languages; i++) | |
4176 | { | |
4177 | const language_defn *lang = language_def ((enum language) i); | |
4178 | if (lang->la_get_symbol_name_matcher != NULL) | |
4179 | { | |
4180 | symbol_name_matcher_ftype *name_matcher | |
4181 | = lang->la_get_symbol_name_matcher (m_lookup_name); | |
4182 | ||
4183 | /* Don't insert the same comparison routine more than once. | |
4184 | Note that we do this linear walk instead of a cheaper | |
4185 | sorted insert, or use a std::set or something like that, | |
4186 | because relative order of function addresses is not | |
4187 | stable. This is not a problem in practice because the | |
4188 | number of supported languages is low, and the cost here | |
4189 | is tiny compared to the number of searches we'll do | |
4190 | afterwards using this object. */ | |
4191 | if (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4192 | == matchers.end ()) | |
4193 | matchers.push_back (name_matcher); | |
4194 | } | |
4195 | } | |
4196 | } | |
4197 | ||
4198 | bool | |
4199 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4200 | { | |
4201 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4202 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4203 | return true; | |
4204 | ||
4205 | return false; | |
4206 | } | |
4207 | ||
e1ef7d7a PA |
4208 | /* Starting from a search name, return the string that finds the upper |
4209 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4210 | list. Returns the empty string to indicate that the upper bound is | |
4211 | the end of the list. */ | |
4212 | ||
4213 | static std::string | |
4214 | make_sort_after_prefix_name (const char *search_name) | |
4215 | { | |
4216 | /* When looking to complete "func", we find the upper bound of all | |
4217 | symbols that start with "func" by looking for where we'd insert | |
4218 | the closest string that would follow "func" in lexicographical | |
4219 | order. Usually, that's "func"-with-last-character-incremented, | |
4220 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4221 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4222 | Especially mind the 0xff character, which is a valid character in | |
4223 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4224 | rule out compilers allowing it in identifiers. Note that | |
4225 | conveniently, strcmp/strcasecmp are specified to compare | |
4226 | characters interpreted as unsigned char. So what we do is treat | |
4227 | the whole string as a base 256 number composed of a sequence of | |
4228 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4229 | to 0, and carries 1 to the following more-significant position. | |
4230 | If the very first character in SEARCH_NAME ends up incremented | |
4231 | and carries/overflows, then the upper bound is the end of the | |
4232 | list. The string after the empty string is also the empty | |
4233 | string. | |
4234 | ||
4235 | Some examples of this operation: | |
4236 | ||
4237 | SEARCH_NAME => "+1" RESULT | |
4238 | ||
4239 | "abc" => "abd" | |
4240 | "ab\xff" => "ac" | |
4241 | "\xff" "a" "\xff" => "\xff" "b" | |
4242 | "\xff" => "" | |
4243 | "\xff\xff" => "" | |
4244 | "" => "" | |
4245 | ||
4246 | Then, with these symbols for example: | |
4247 | ||
4248 | func | |
4249 | func1 | |
4250 | fund | |
4251 | ||
4252 | completing "func" looks for symbols between "func" and | |
4253 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4254 | which finds "func" and "func1", but not "fund". | |
4255 | ||
4256 | And with: | |
4257 | ||
4258 | funcÿ (Latin1 'ÿ' [0xff]) | |
4259 | funcÿ1 | |
4260 | fund | |
4261 | ||
4262 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4263 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4264 | ||
4265 | And with: | |
4266 | ||
4267 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4268 | ÿÿ1 | |
4269 | ||
4270 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4271 | the end of the list. | |
4272 | */ | |
4273 | std::string after = search_name; | |
4274 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4275 | after.pop_back (); | |
4276 | if (!after.empty ()) | |
4277 | after.back () = (unsigned char) after.back () + 1; | |
4278 | return after; | |
4279 | } | |
4280 | ||
5c58de74 | 4281 | /* See declaration. */ |
61d96d7e | 4282 | |
5c58de74 PA |
4283 | std::pair<std::vector<name_component>::const_iterator, |
4284 | std::vector<name_component>::const_iterator> | |
4285 | mapped_index::find_name_components_bounds | |
4286 | (const lookup_name_info &lookup_name_without_params) const | |
3f563c84 | 4287 | { |
5c58de74 PA |
4288 | auto *name_cmp |
4289 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 PA |
4290 | |
4291 | const char *cplus | |
c62446b1 | 4292 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4293 | |
3f563c84 PA |
4294 | /* Comparison function object for lower_bound that matches against a |
4295 | given symbol name. */ | |
4296 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4297 | const char *name) | |
4298 | { | |
5c58de74 | 4299 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4300 | const char *elem_name = elem_qualified + elem.name_offset; |
4301 | return name_cmp (elem_name, name) < 0; | |
4302 | }; | |
4303 | ||
4304 | /* Comparison function object for upper_bound that matches against a | |
4305 | given symbol name. */ | |
4306 | auto lookup_compare_upper = [&] (const char *name, | |
4307 | const name_component &elem) | |
4308 | { | |
5c58de74 | 4309 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4310 | const char *elem_name = elem_qualified + elem.name_offset; |
4311 | return name_cmp (name, elem_name) < 0; | |
4312 | }; | |
4313 | ||
5c58de74 PA |
4314 | auto begin = this->name_components.begin (); |
4315 | auto end = this->name_components.end (); | |
3f563c84 PA |
4316 | |
4317 | /* Find the lower bound. */ | |
4318 | auto lower = [&] () | |
4319 | { | |
5c58de74 | 4320 | if (lookup_name_without_params.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4321 | return begin; |
4322 | else | |
4323 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4324 | } (); | |
4325 | ||
4326 | /* Find the upper bound. */ | |
4327 | auto upper = [&] () | |
4328 | { | |
5c58de74 | 4329 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4330 | { |
e1ef7d7a PA |
4331 | /* In completion mode, we want UPPER to point past all |
4332 | symbols names that have the same prefix. I.e., with | |
4333 | these symbols, and completing "func": | |
4334 | ||
4335 | function << lower bound | |
4336 | function1 | |
4337 | other_function << upper bound | |
4338 | ||
4339 | We find the upper bound by looking for the insertion | |
4340 | point of "func"-with-last-character-incremented, | |
4341 | i.e. "fund". */ | |
4342 | std::string after = make_sort_after_prefix_name (cplus); | |
4343 | if (after.empty ()) | |
3f563c84 | 4344 | return end; |
e6b2f5ef PA |
4345 | return std::lower_bound (lower, end, after.c_str (), |
4346 | lookup_compare_lower); | |
3f563c84 PA |
4347 | } |
4348 | else | |
4349 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4350 | } (); | |
4351 | ||
5c58de74 PA |
4352 | return {lower, upper}; |
4353 | } | |
4354 | ||
4355 | /* See declaration. */ | |
4356 | ||
4357 | void | |
4358 | mapped_index::build_name_components () | |
4359 | { | |
4360 | if (!this->name_components.empty ()) | |
4361 | return; | |
4362 | ||
4363 | this->name_components_casing = case_sensitivity; | |
4364 | auto *name_cmp | |
4365 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4366 | ||
4367 | /* The code below only knows how to break apart components of C++ | |
4368 | symbol names (and other languages that use '::' as | |
4369 | namespace/module separator). If we add support for wild matching | |
4370 | to some language that uses some other operator (E.g., Ada, Go and | |
4371 | D use '.'), then we'll need to try splitting the symbol name | |
4372 | according to that language too. Note that Ada does support wild | |
4373 | matching, but doesn't currently support .gdb_index. */ | |
4374 | for (size_t iter = 0; iter < this->symbol_table_slots; ++iter) | |
4375 | { | |
4376 | offset_type idx = 2 * iter; | |
4377 | ||
4378 | if (this->symbol_table[idx] == 0 | |
4379 | && this->symbol_table[idx + 1] == 0) | |
4380 | continue; | |
4381 | ||
4382 | const char *name = this->symbol_name_at (idx); | |
4383 | ||
4384 | /* Add each name component to the name component table. */ | |
4385 | unsigned int previous_len = 0; | |
4386 | for (unsigned int current_len = cp_find_first_component (name); | |
4387 | name[current_len] != '\0'; | |
4388 | current_len += cp_find_first_component (name + current_len)) | |
4389 | { | |
4390 | gdb_assert (name[current_len] == ':'); | |
4391 | this->name_components.push_back ({previous_len, idx}); | |
4392 | /* Skip the '::'. */ | |
4393 | current_len += 2; | |
4394 | previous_len = current_len; | |
4395 | } | |
4396 | this->name_components.push_back ({previous_len, idx}); | |
4397 | } | |
4398 | ||
4399 | /* Sort name_components elements by name. */ | |
4400 | auto name_comp_compare = [&] (const name_component &left, | |
4401 | const name_component &right) | |
4402 | { | |
4403 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4404 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4405 | ||
4406 | const char *left_name = left_qualified + left.name_offset; | |
4407 | const char *right_name = right_qualified + right.name_offset; | |
4408 | ||
4409 | return name_cmp (left_name, right_name) < 0; | |
4410 | }; | |
4411 | ||
4412 | std::sort (this->name_components.begin (), | |
4413 | this->name_components.end (), | |
4414 | name_comp_compare); | |
4415 | } | |
4416 | ||
4417 | /* Helper for dw2_expand_symtabs_matching that works with a | |
4418 | mapped_index instead of the containing objfile. This is split to a | |
4419 | separate function in order to be able to unit test the | |
4420 | name_components matching using a mock mapped_index. For each | |
4421 | symbol name that matches, calls MATCH_CALLBACK, passing it the | |
4422 | symbol's index in the mapped_index symbol table. */ | |
4423 | ||
4424 | static void | |
4425 | dw2_expand_symtabs_matching_symbol | |
4426 | (mapped_index &index, | |
4427 | const lookup_name_info &lookup_name_in, | |
4428 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4429 | enum search_domain kind, | |
4430 | gdb::function_view<void (offset_type)> match_callback) | |
4431 | { | |
4432 | lookup_name_info lookup_name_without_params | |
4433 | = lookup_name_in.make_ignore_params (); | |
4434 | gdb_index_symbol_name_matcher lookup_name_matcher | |
4435 | (lookup_name_without_params); | |
4436 | ||
4437 | /* Build the symbol name component sorted vector, if we haven't | |
4438 | yet. */ | |
4439 | index.build_name_components (); | |
4440 | ||
4441 | auto bounds = index.find_name_components_bounds (lookup_name_without_params); | |
4442 | ||
3f563c84 PA |
4443 | /* Now for each symbol name in range, check to see if we have a name |
4444 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4445 | ||
4446 | /* The same symbol may appear more than once in the range though. | |
4447 | E.g., if we're looking for symbols that complete "w", and we have | |
4448 | a symbol named "w1::w2", we'll find the two name components for | |
4449 | that same symbol in the range. To be sure we only call the | |
4450 | callback once per symbol, we first collect the symbol name | |
4451 | indexes that matched in a temporary vector and ignore | |
4452 | duplicates. */ | |
4453 | std::vector<offset_type> matches; | |
5c58de74 | 4454 | matches.reserve (std::distance (bounds.first, bounds.second)); |
3f563c84 | 4455 | |
5c58de74 | 4456 | for (; bounds.first != bounds.second; ++bounds.first) |
3f563c84 | 4457 | { |
5c58de74 | 4458 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
3f563c84 PA |
4459 | |
4460 | if (!lookup_name_matcher.matches (qualified) | |
4461 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4462 | continue; |
4463 | ||
5c58de74 | 4464 | matches.push_back (bounds.first->idx); |
3f563c84 PA |
4465 | } |
4466 | ||
4467 | std::sort (matches.begin (), matches.end ()); | |
4468 | ||
4469 | /* Finally call the callback, once per match. */ | |
4470 | ULONGEST prev = -1; | |
4471 | for (offset_type idx : matches) | |
4472 | { | |
4473 | if (prev != idx) | |
4474 | { | |
4475 | match_callback (idx); | |
4476 | prev = idx; | |
4477 | } | |
4478 | } | |
4479 | ||
4480 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4481 | (offset_type)-1 are both possible values. */ | |
4482 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4483 | } | |
4484 | ||
c62446b1 PA |
4485 | #if GDB_SELF_TEST |
4486 | ||
4487 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4488 | ||
4489 | /* A wrapper around mapped_index that builds a mock mapped_index, from | |
4490 | the symbol list passed as parameter to the constructor. */ | |
4491 | class mock_mapped_index | |
4492 | { | |
4493 | public: | |
4494 | template<size_t N> | |
4495 | mock_mapped_index (const char *(&symbols)[N]) | |
4496 | : mock_mapped_index (symbols, N) | |
4497 | {} | |
4498 | ||
4499 | /* Access the built index. */ | |
4500 | mapped_index &index () | |
4501 | { return m_index; } | |
4502 | ||
4503 | /* Disable copy. */ | |
4504 | mock_mapped_index(const mock_mapped_index &) = delete; | |
4505 | void operator= (const mock_mapped_index &) = delete; | |
4506 | ||
4507 | private: | |
4508 | mock_mapped_index (const char **symbols, size_t symbols_size) | |
4509 | { | |
4510 | /* No string can live at offset zero. Add a dummy entry. */ | |
4511 | obstack_grow_str0 (&m_constant_pool, ""); | |
4512 | ||
4513 | for (size_t i = 0; i < symbols_size; i++) | |
4514 | { | |
4515 | const char *sym = symbols[i]; | |
4516 | size_t offset = obstack_object_size (&m_constant_pool); | |
4517 | obstack_grow_str0 (&m_constant_pool, sym); | |
4518 | m_symbol_table.push_back (offset); | |
4519 | m_symbol_table.push_back (0); | |
4520 | }; | |
4521 | ||
4522 | m_index.constant_pool = (const char *) obstack_base (&m_constant_pool); | |
4523 | m_index.symbol_table = m_symbol_table.data (); | |
4524 | m_index.symbol_table_slots = m_symbol_table.size () / 2; | |
4525 | } | |
4526 | ||
4527 | public: | |
4528 | /* The built mapped_index. */ | |
4529 | mapped_index m_index{}; | |
4530 | ||
4531 | /* The storage that the built mapped_index uses for symbol and | |
4532 | constant pool tables. */ | |
4533 | std::vector<offset_type> m_symbol_table; | |
4534 | auto_obstack m_constant_pool; | |
4535 | }; | |
4536 | ||
4537 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4538 | string, to pass to print routines. */ | |
4539 | ||
4540 | static const char * | |
4541 | string_or_null (const char *str) | |
4542 | { | |
4543 | return str != NULL ? str : "<null>"; | |
4544 | } | |
4545 | ||
4546 | /* Check if a lookup_name_info built from | |
4547 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4548 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4549 | matching order. If no match expected, then an empty list is | |
4550 | specified. Returns true on success. On failure prints a warning | |
4551 | indicating the file:line that failed, and returns false. */ | |
4552 | ||
4553 | static bool | |
4554 | check_match (const char *file, int line, | |
4555 | mock_mapped_index &mock_index, | |
4556 | const char *name, symbol_name_match_type match_type, | |
4557 | bool completion_mode, | |
4558 | std::initializer_list<const char *> expected_list) | |
4559 | { | |
4560 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4561 | ||
4562 | bool matched = true; | |
4563 | ||
4564 | auto mismatch = [&] (const char *expected_str, | |
4565 | const char *got) | |
4566 | { | |
4567 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4568 | "expected=\"%s\", got=\"%s\"\n"), | |
4569 | file, line, | |
4570 | (match_type == symbol_name_match_type::FULL | |
4571 | ? "FULL" : "WILD"), | |
4572 | name, string_or_null (expected_str), string_or_null (got)); | |
4573 | matched = false; | |
4574 | }; | |
4575 | ||
4576 | auto expected_it = expected_list.begin (); | |
4577 | auto expected_end = expected_list.end (); | |
4578 | ||
4579 | dw2_expand_symtabs_matching_symbol (mock_index.index (), lookup_name, | |
4580 | NULL, ALL_DOMAIN, | |
4581 | [&] (offset_type idx) | |
4582 | { | |
4583 | const char *matched_name = mock_index.index ().symbol_name_at (idx); | |
4584 | const char *expected_str | |
4585 | = expected_it == expected_end ? NULL : *expected_it++; | |
4586 | ||
4587 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4588 | mismatch (expected_str, matched_name); | |
4589 | }); | |
4590 | ||
4591 | const char *expected_str | |
4592 | = expected_it == expected_end ? NULL : *expected_it++; | |
4593 | if (expected_str != NULL) | |
4594 | mismatch (expected_str, NULL); | |
4595 | ||
4596 | return matched; | |
4597 | } | |
4598 | ||
4599 | /* The symbols added to the mock mapped_index for testing (in | |
4600 | canonical form). */ | |
4601 | static const char *test_symbols[] = { | |
4602 | "function", | |
4603 | "std::bar", | |
4604 | "std::zfunction", | |
4605 | "std::zfunction2", | |
4606 | "w1::w2", | |
4607 | "ns::foo<char*>", | |
4608 | "ns::foo<int>", | |
4609 | "ns::foo<long>", | |
a20714ff PA |
4610 | "ns2::tmpl<int>::foo2", |
4611 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4612 | |
e1ef7d7a PA |
4613 | /* These are used to check that the increment-last-char in the |
4614 | matching algorithm for completion doesn't match "t1_fund" when | |
4615 | completing "t1_func". */ | |
4616 | "t1_func", | |
4617 | "t1_func1", | |
4618 | "t1_fund", | |
4619 | "t1_fund1", | |
4620 | ||
4621 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4622 | cp-name-parser understands this as a single identifier ("função" | |
4623 | is "function" in PT). */ | |
4624 | u8"u8função", | |
4625 | ||
4626 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4627 | "yfunc\377", | |
4628 | ||
4629 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4630 | "\377", | |
4631 | "\377\377123", | |
4632 | ||
c62446b1 PA |
4633 | /* A name with all sorts of complications. Starts with "z" to make |
4634 | it easier for the completion tests below. */ | |
4635 | #define Z_SYM_NAME \ | |
4636 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4637 | "::tuple<(anonymous namespace)::ui*, " \ | |
4638 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4639 | ||
4640 | Z_SYM_NAME | |
4641 | }; | |
4642 | ||
5c58de74 PA |
4643 | /* Returns true if the mapped_index::find_name_component_bounds method |
4644 | finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, in | |
4645 | completion mode. */ | |
4646 | ||
4647 | static bool | |
4648 | check_find_bounds_finds (mapped_index &index, | |
4649 | const char *search_name, | |
4650 | gdb::array_view<const char *> expected_syms) | |
4651 | { | |
4652 | lookup_name_info lookup_name (search_name, | |
4653 | symbol_name_match_type::FULL, true); | |
4654 | ||
4655 | auto bounds = index.find_name_components_bounds (lookup_name); | |
4656 | ||
4657 | size_t distance = std::distance (bounds.first, bounds.second); | |
4658 | if (distance != expected_syms.size ()) | |
4659 | return false; | |
4660 | ||
4661 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4662 | { | |
4663 | auto nc_elem = bounds.first + exp_elem; | |
4664 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4665 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4666 | return false; | |
4667 | } | |
4668 | ||
4669 | return true; | |
4670 | } | |
4671 | ||
4672 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4673 | method. */ | |
4674 | ||
c62446b1 | 4675 | static void |
5c58de74 PA |
4676 | test_mapped_index_find_name_component_bounds () |
4677 | { | |
4678 | mock_mapped_index mock_index (test_symbols); | |
4679 | ||
4680 | mock_index.index ().build_name_components (); | |
4681 | ||
4682 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4683 | method in completion mode. */ | |
4684 | { | |
4685 | static const char *expected_syms[] = { | |
4686 | "t1_func", | |
4687 | "t1_func1", | |
5c58de74 PA |
4688 | }; |
4689 | ||
4690 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4691 | "t1_func", expected_syms)); | |
4692 | } | |
4693 | ||
4694 | /* Check that the increment-last-char in the name matching algorithm | |
4695 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4696 | { | |
4697 | static const char *expected_syms1[] = { | |
4698 | "\377", | |
4699 | "\377\377123", | |
4700 | }; | |
4701 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4702 | "\377", expected_syms1)); | |
4703 | ||
4704 | static const char *expected_syms2[] = { | |
4705 | "\377\377123", | |
4706 | }; | |
4707 | SELF_CHECK (check_find_bounds_finds (mock_index.index (), | |
4708 | "\377\377", expected_syms2)); | |
4709 | } | |
4710 | } | |
4711 | ||
4712 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4713 | ||
4714 | static void | |
4715 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4716 | { |
4717 | mock_mapped_index mock_index (test_symbols); | |
4718 | ||
4719 | /* We let all tests run until the end even if some fails, for debug | |
4720 | convenience. */ | |
4721 | bool any_mismatch = false; | |
4722 | ||
4723 | /* Create the expected symbols list (an initializer_list). Needed | |
4724 | because lists have commas, and we need to pass them to CHECK, | |
4725 | which is a macro. */ | |
4726 | #define EXPECT(...) { __VA_ARGS__ } | |
4727 | ||
4728 | /* Wrapper for check_match that passes down the current | |
4729 | __FILE__/__LINE__. */ | |
4730 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4731 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4732 | mock_index, \ | |
4733 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4734 | EXPECTED_LIST) | |
4735 | ||
4736 | /* Identity checks. */ | |
4737 | for (const char *sym : test_symbols) | |
4738 | { | |
4739 | /* Should be able to match all existing symbols. */ | |
4740 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4741 | EXPECT (sym)); | |
4742 | ||
4743 | /* Should be able to match all existing symbols with | |
4744 | parameters. */ | |
4745 | std::string with_params = std::string (sym) + "(int)"; | |
4746 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4747 | EXPECT (sym)); | |
4748 | ||
4749 | /* Should be able to match all existing symbols with | |
4750 | parameters and qualifiers. */ | |
4751 | with_params = std::string (sym) + " ( int ) const"; | |
4752 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4753 | EXPECT (sym)); | |
4754 | ||
4755 | /* This should really find sym, but cp-name-parser.y doesn't | |
4756 | know about lvalue/rvalue qualifiers yet. */ | |
4757 | with_params = std::string (sym) + " ( int ) &&"; | |
4758 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4759 | {}); | |
4760 | } | |
4761 | ||
e1ef7d7a PA |
4762 | /* Check that the name matching algorithm for completion doesn't get |
4763 | confused with Latin1 'ÿ' / 0xff. */ | |
4764 | { | |
4765 | static const char str[] = "\377"; | |
4766 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4767 | EXPECT ("\377", "\377\377123")); | |
4768 | } | |
4769 | ||
4770 | /* Check that the increment-last-char in the matching algorithm for | |
4771 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4772 | { | |
4773 | static const char str[] = "t1_func"; | |
4774 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4775 | EXPECT ("t1_func", "t1_func1")); | |
4776 | } | |
4777 | ||
c62446b1 PA |
4778 | /* Check that completion mode works at each prefix of the expected |
4779 | symbol name. */ | |
4780 | { | |
4781 | static const char str[] = "function(int)"; | |
4782 | size_t len = strlen (str); | |
4783 | std::string lookup; | |
4784 | ||
4785 | for (size_t i = 1; i < len; i++) | |
4786 | { | |
4787 | lookup.assign (str, i); | |
4788 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4789 | EXPECT ("function")); | |
4790 | } | |
4791 | } | |
4792 | ||
4793 | /* While "w" is a prefix of both components, the match function | |
4794 | should still only be called once. */ | |
4795 | { | |
4796 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4797 | EXPECT ("w1::w2")); | |
a20714ff PA |
4798 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4799 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4800 | } |
4801 | ||
4802 | /* Same, with a "complicated" symbol. */ | |
4803 | { | |
4804 | static const char str[] = Z_SYM_NAME; | |
4805 | size_t len = strlen (str); | |
4806 | std::string lookup; | |
4807 | ||
4808 | for (size_t i = 1; i < len; i++) | |
4809 | { | |
4810 | lookup.assign (str, i); | |
4811 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4812 | EXPECT (Z_SYM_NAME)); | |
4813 | } | |
4814 | } | |
4815 | ||
4816 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4817 | { | |
4818 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4819 | {}); | |
4820 | } | |
4821 | ||
4822 | /* A complete symbol with parameters matches any overload, since the | |
4823 | index has no overload info. */ | |
4824 | { | |
4825 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4826 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4827 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4828 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4829 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4830 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4831 | } |
4832 | ||
4833 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4834 | template argument list. */ | |
4835 | { | |
4836 | static const char expected[] = "ns::foo<int>"; | |
4837 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4838 | EXPECT (expected)); | |
a20714ff PA |
4839 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4840 | EXPECT (expected)); | |
c62446b1 PA |
4841 | } |
4842 | ||
4843 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4844 | template argument list that includes a pointer. */ | |
4845 | { | |
4846 | static const char expected[] = "ns::foo<char*>"; | |
4847 | /* Try both completion and non-completion modes. */ | |
4848 | static const bool completion_mode[2] = {false, true}; | |
4849 | for (size_t i = 0; i < 2; i++) | |
4850 | { | |
4851 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4852 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4853 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4854 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4855 | |
4856 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4857 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4858 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4859 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4860 | } |
4861 | } | |
4862 | ||
4863 | { | |
4864 | /* Check method qualifiers are ignored. */ | |
4865 | static const char expected[] = "ns::foo<char*>"; | |
4866 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4867 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4868 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4869 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4870 | CHECK_MATCH ("foo < char * > ( int ) const", |
4871 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4872 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4873 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4874 | } |
4875 | ||
4876 | /* Test lookup names that don't match anything. */ | |
4877 | { | |
a20714ff PA |
4878 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4879 | {}); | |
4880 | ||
c62446b1 PA |
4881 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4882 | {}); | |
4883 | } | |
4884 | ||
a20714ff PA |
4885 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4886 | which should not be confused with a parameter list. */ | |
4887 | { | |
4888 | static const char *syms[] = { | |
4889 | "A::B::C", | |
4890 | "B::C", | |
4891 | "C", | |
4892 | "A :: B :: C ( int )", | |
4893 | "B :: C ( int )", | |
4894 | "C ( int )", | |
4895 | }; | |
4896 | ||
4897 | for (const char *s : syms) | |
4898 | { | |
4899 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4900 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4901 | } | |
4902 | } | |
4903 | ||
4904 | { | |
4905 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4906 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4907 | EXPECT (expected)); | |
4908 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4909 | EXPECT (expected)); | |
4910 | } | |
4911 | ||
c62446b1 PA |
4912 | SELF_CHECK (!any_mismatch); |
4913 | ||
4914 | #undef EXPECT | |
4915 | #undef CHECK_MATCH | |
4916 | } | |
4917 | ||
5c58de74 PA |
4918 | static void |
4919 | run_test () | |
4920 | { | |
4921 | test_mapped_index_find_name_component_bounds (); | |
4922 | test_dw2_expand_symtabs_matching_symbol (); | |
4923 | } | |
4924 | ||
c62446b1 PA |
4925 | }} // namespace selftests::dw2_expand_symtabs_matching |
4926 | ||
4927 | #endif /* GDB_SELF_TEST */ | |
4928 | ||
3f563c84 PA |
4929 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4930 | matched, to expand corresponding CUs that were marked. IDX is the | |
4931 | index of the symbol name that matched. */ | |
4932 | ||
4933 | static void | |
4934 | dw2_expand_marked_cus | |
4935 | (mapped_index &index, offset_type idx, | |
4936 | struct objfile *objfile, | |
4937 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4938 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4939 | search_domain kind) | |
4940 | { | |
3f563c84 PA |
4941 | offset_type *vec, vec_len, vec_idx; |
4942 | bool global_seen = false; | |
4943 | ||
61920122 PA |
4944 | vec = (offset_type *) (index.constant_pool |
4945 | + MAYBE_SWAP (index.symbol_table[idx + 1])); | |
4946 | vec_len = MAYBE_SWAP (vec[0]); | |
4947 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4948 | { | |
4949 | struct dwarf2_per_cu_data *per_cu; | |
4950 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); | |
4951 | /* This value is only valid for index versions >= 7. */ | |
4952 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4953 | gdb_index_symbol_kind symbol_kind = | |
4954 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4955 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4956 | /* Only check the symbol attributes if they're present. | |
4957 | Indices prior to version 7 don't record them, | |
4958 | and indices >= 7 may elide them for certain symbols | |
4959 | (gold does this). */ | |
4960 | int attrs_valid = | |
4961 | (index.version >= 7 | |
4962 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4963 | ||
4964 | /* Work around gold/15646. */ | |
4965 | if (attrs_valid) | |
9291a0cd | 4966 | { |
61920122 PA |
4967 | if (!is_static && global_seen) |
4968 | continue; | |
4969 | if (!is_static) | |
4970 | global_seen = true; | |
4971 | } | |
3190f0c6 | 4972 | |
61920122 PA |
4973 | /* Only check the symbol's kind if it has one. */ |
4974 | if (attrs_valid) | |
4975 | { | |
4976 | switch (kind) | |
8943b874 | 4977 | { |
61920122 PA |
4978 | case VARIABLES_DOMAIN: |
4979 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4980 | continue; | |
4981 | break; | |
4982 | case FUNCTIONS_DOMAIN: | |
4983 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4984 | continue; |
61920122 PA |
4985 | break; |
4986 | case TYPES_DOMAIN: | |
4987 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4988 | continue; | |
4989 | break; | |
4990 | default: | |
4991 | break; | |
8943b874 | 4992 | } |
61920122 | 4993 | } |
8943b874 | 4994 | |
61920122 PA |
4995 | /* Don't crash on bad data. */ |
4996 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4997 | + dwarf2_per_objfile->n_type_units)) | |
4998 | { | |
4999 | complaint (&symfile_complaints, | |
5000 | _(".gdb_index entry has bad CU index" | |
5001 | " [in module %s]"), objfile_name (objfile)); | |
5002 | continue; | |
5003 | } | |
5004 | ||
5005 | per_cu = dw2_get_cutu (cu_index); | |
5006 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
5007 | { | |
5008 | int symtab_was_null = | |
5009 | (per_cu->v.quick->compunit_symtab == NULL); | |
5010 | ||
5011 | dw2_instantiate_symtab (per_cu); | |
5012 | ||
5013 | if (expansion_notify != NULL | |
5014 | && symtab_was_null | |
5015 | && per_cu->v.quick->compunit_symtab != NULL) | |
5016 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
5017 | } | |
5018 | } | |
5019 | } | |
5020 | ||
5021 | static void | |
5022 | dw2_expand_symtabs_matching | |
5023 | (struct objfile *objfile, | |
5024 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5025 | const lookup_name_info &lookup_name, | |
5026 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5027 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5028 | enum search_domain kind) | |
5029 | { | |
5030 | int i; | |
61920122 PA |
5031 | |
5032 | dw2_setup (objfile); | |
5033 | ||
5034 | /* index_table is NULL if OBJF_READNOW. */ | |
5035 | if (!dwarf2_per_objfile->index_table) | |
5036 | return; | |
5037 | ||
5038 | if (file_matcher != NULL) | |
5039 | { | |
5040 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
5041 | htab_eq_pointer, | |
5042 | NULL, xcalloc, xfree)); | |
5043 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
5044 | htab_eq_pointer, | |
5045 | NULL, xcalloc, xfree)); | |
5046 | ||
5047 | /* The rule is CUs specify all the files, including those used by | |
5048 | any TU, so there's no need to scan TUs here. */ | |
5049 | ||
5050 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5051 | { | |
5052 | int j; | |
5053 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5054 | struct quick_file_names *file_data; | |
5055 | void **slot; | |
5056 | ||
5057 | QUIT; | |
5058 | ||
5059 | per_cu->v.quick->mark = 0; | |
156942c7 | 5060 | |
61920122 PA |
5061 | /* We only need to look at symtabs not already expanded. */ |
5062 | if (per_cu->v.quick->compunit_symtab) | |
5063 | continue; | |
5064 | ||
5065 | file_data = dw2_get_file_names (per_cu); | |
5066 | if (file_data == NULL) | |
5067 | continue; | |
5068 | ||
5069 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5070 | continue; | |
5071 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
3190f0c6 | 5072 | { |
61920122 | 5073 | per_cu->v.quick->mark = 1; |
3190f0c6 DE |
5074 | continue; |
5075 | } | |
5076 | ||
61920122 | 5077 | for (j = 0; j < file_data->num_file_names; ++j) |
276d885b | 5078 | { |
61920122 | 5079 | const char *this_real_name; |
276d885b | 5080 | |
61920122 PA |
5081 | if (file_matcher (file_data->file_names[j], false)) |
5082 | { | |
5083 | per_cu->v.quick->mark = 1; | |
5084 | break; | |
5085 | } | |
5086 | ||
5087 | /* Before we invoke realpath, which can get expensive when many | |
5088 | files are involved, do a quick comparison of the basenames. */ | |
5089 | if (!basenames_may_differ | |
5090 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5091 | true)) | |
5092 | continue; | |
276d885b | 5093 | |
61920122 PA |
5094 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
5095 | if (file_matcher (this_real_name, false)) | |
276d885b | 5096 | { |
61920122 PA |
5097 | per_cu->v.quick->mark = 1; |
5098 | break; | |
276d885b GB |
5099 | } |
5100 | } | |
61920122 PA |
5101 | |
5102 | slot = htab_find_slot (per_cu->v.quick->mark | |
5103 | ? visited_found.get () | |
5104 | : visited_not_found.get (), | |
5105 | file_data, INSERT); | |
5106 | *slot = file_data; | |
9291a0cd | 5107 | } |
61920122 PA |
5108 | } |
5109 | ||
5110 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5111 | ||
5112 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5113 | symbol_matcher, | |
5114 | kind, [&] (offset_type idx) | |
5115 | { | |
5116 | dw2_expand_marked_cus (index, idx, objfile, file_matcher, | |
5117 | expansion_notify, kind); | |
5118 | }); | |
9291a0cd TT |
5119 | } |
5120 | ||
43f3e411 | 5121 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
5122 | symtab. */ |
5123 | ||
43f3e411 DE |
5124 | static struct compunit_symtab * |
5125 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5126 | CORE_ADDR pc) | |
9703b513 TT |
5127 | { |
5128 | int i; | |
5129 | ||
43f3e411 DE |
5130 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
5131 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5132 | return cust; | |
9703b513 | 5133 | |
43f3e411 | 5134 | if (cust->includes == NULL) |
a3ec0bb1 DE |
5135 | return NULL; |
5136 | ||
43f3e411 | 5137 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 5138 | { |
43f3e411 | 5139 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 5140 | |
43f3e411 | 5141 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
5142 | if (s != NULL) |
5143 | return s; | |
5144 | } | |
5145 | ||
5146 | return NULL; | |
5147 | } | |
5148 | ||
43f3e411 DE |
5149 | static struct compunit_symtab * |
5150 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5151 | struct bound_minimal_symbol msymbol, | |
5152 | CORE_ADDR pc, | |
5153 | struct obj_section *section, | |
5154 | int warn_if_readin) | |
9291a0cd TT |
5155 | { |
5156 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 5157 | struct compunit_symtab *result; |
9291a0cd TT |
5158 | |
5159 | dw2_setup (objfile); | |
5160 | ||
5161 | if (!objfile->psymtabs_addrmap) | |
5162 | return NULL; | |
5163 | ||
9a3c8263 SM |
5164 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
5165 | pc); | |
9291a0cd TT |
5166 | if (!data) |
5167 | return NULL; | |
5168 | ||
43f3e411 | 5169 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 5170 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
5171 | paddress (get_objfile_arch (objfile), pc)); |
5172 | ||
43f3e411 DE |
5173 | result |
5174 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
5175 | pc); | |
9703b513 TT |
5176 | gdb_assert (result != NULL); |
5177 | return result; | |
9291a0cd TT |
5178 | } |
5179 | ||
9291a0cd | 5180 | static void |
44b13c5a | 5181 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 5182 | void *data, int need_fullname) |
9291a0cd | 5183 | { |
9291a0cd | 5184 | dw2_setup (objfile); |
ae2de4f8 | 5185 | |
bbf2f4df | 5186 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 5187 | { |
bbf2f4df | 5188 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 5189 | |
bbf2f4df PA |
5190 | htab_up visited (htab_create_alloc (10, |
5191 | htab_hash_pointer, htab_eq_pointer, | |
5192 | NULL, xcalloc, xfree)); | |
24c79950 | 5193 | |
bbf2f4df PA |
5194 | /* The rule is CUs specify all the files, including those used |
5195 | by any TU, so there's no need to scan TUs here. We can | |
5196 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 5197 | |
bbf2f4df PA |
5198 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
5199 | { | |
5200 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 5201 | |
bbf2f4df PA |
5202 | if (per_cu->v.quick->compunit_symtab) |
5203 | { | |
5204 | void **slot = htab_find_slot (visited.get (), | |
5205 | per_cu->v.quick->file_names, | |
5206 | INSERT); | |
9291a0cd | 5207 | |
bbf2f4df PA |
5208 | *slot = per_cu->v.quick->file_names; |
5209 | } | |
24c79950 | 5210 | } |
24c79950 | 5211 | |
bbf2f4df | 5212 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 5213 | { |
bbf2f4df PA |
5214 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
5215 | struct quick_file_names *file_data; | |
5216 | void **slot; | |
5217 | ||
5218 | /* We only need to look at symtabs not already expanded. */ | |
5219 | if (per_cu->v.quick->compunit_symtab) | |
5220 | continue; | |
74e2f255 | 5221 | |
bbf2f4df PA |
5222 | file_data = dw2_get_file_names (per_cu); |
5223 | if (file_data == NULL) | |
5224 | continue; | |
5225 | ||
5226 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
5227 | if (*slot) | |
5228 | { | |
5229 | /* Already visited. */ | |
5230 | continue; | |
5231 | } | |
5232 | *slot = file_data; | |
5233 | ||
5234 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5235 | { | |
5236 | const char *filename = file_data->file_names[j]; | |
5237 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5238 | } | |
9291a0cd TT |
5239 | } |
5240 | } | |
bbf2f4df PA |
5241 | |
5242 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5243 | { | |
14278e1f | 5244 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
5245 | |
5246 | if (need_fullname) | |
5247 | this_real_name = gdb_realpath (filename); | |
14278e1f | 5248 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 5249 | }); |
9291a0cd TT |
5250 | } |
5251 | ||
5252 | static int | |
5253 | dw2_has_symbols (struct objfile *objfile) | |
5254 | { | |
5255 | return 1; | |
5256 | } | |
5257 | ||
5258 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5259 | { | |
5260 | dw2_has_symbols, | |
5261 | dw2_find_last_source_symtab, | |
5262 | dw2_forget_cached_source_info, | |
f8eba3c6 | 5263 | dw2_map_symtabs_matching_filename, |
9291a0cd | 5264 | dw2_lookup_symbol, |
9291a0cd TT |
5265 | dw2_print_stats, |
5266 | dw2_dump, | |
5267 | dw2_relocate, | |
5268 | dw2_expand_symtabs_for_function, | |
5269 | dw2_expand_all_symtabs, | |
652a8996 | 5270 | dw2_expand_symtabs_with_fullname, |
40658b94 | 5271 | dw2_map_matching_symbols, |
9291a0cd | 5272 | dw2_expand_symtabs_matching, |
43f3e411 | 5273 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 5274 | NULL, |
9291a0cd TT |
5275 | dw2_map_symbol_filenames |
5276 | }; | |
5277 | ||
5278 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
5279 | file will use psymtabs, or 1 if using the GNU index. */ | |
5280 | ||
5281 | int | |
5282 | dwarf2_initialize_objfile (struct objfile *objfile) | |
5283 | { | |
5284 | /* If we're about to read full symbols, don't bother with the | |
5285 | indices. In this case we also don't care if some other debug | |
5286 | format is making psymtabs, because they are all about to be | |
5287 | expanded anyway. */ | |
5288 | if ((objfile->flags & OBJF_READNOW)) | |
5289 | { | |
5290 | int i; | |
5291 | ||
5292 | dwarf2_per_objfile->using_index = 1; | |
5293 | create_all_comp_units (objfile); | |
0e50663e | 5294 | create_all_type_units (objfile); |
7b9f3c50 DE |
5295 | dwarf2_per_objfile->quick_file_names_table = |
5296 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 5297 | |
1fd400ff | 5298 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 5299 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 5300 | { |
8832e7e3 | 5301 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 5302 | |
e254ef6a DE |
5303 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5304 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5305 | } |
5306 | ||
5307 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5308 | these functions will be no-ops because we will have expanded | |
5309 | all symtabs. */ | |
5310 | return 1; | |
5311 | } | |
5312 | ||
5313 | if (dwarf2_read_index (objfile)) | |
5314 | return 1; | |
5315 | ||
9291a0cd TT |
5316 | return 0; |
5317 | } | |
5318 | ||
5319 | \f | |
5320 | ||
dce234bc PP |
5321 | /* Build a partial symbol table. */ |
5322 | ||
5323 | void | |
f29dff0a | 5324 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5325 | { |
c9bf0622 | 5326 | |
af5bf4ad SM |
5327 | if (objfile->global_psymbols.capacity () == 0 |
5328 | && objfile->static_psymbols.capacity () == 0) | |
5329 | init_psymbol_list (objfile, 1024); | |
c906108c | 5330 | |
492d29ea | 5331 | TRY |
c9bf0622 TT |
5332 | { |
5333 | /* This isn't really ideal: all the data we allocate on the | |
5334 | objfile's obstack is still uselessly kept around. However, | |
5335 | freeing it seems unsafe. */ | |
906768f9 | 5336 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 5337 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 5338 | psymtabs.keep (); |
c9bf0622 | 5339 | } |
492d29ea PA |
5340 | CATCH (except, RETURN_MASK_ERROR) |
5341 | { | |
5342 | exception_print (gdb_stderr, except); | |
5343 | } | |
5344 | END_CATCH | |
c906108c | 5345 | } |
c906108c | 5346 | |
1ce1cefd DE |
5347 | /* Return the total length of the CU described by HEADER. */ |
5348 | ||
5349 | static unsigned int | |
5350 | get_cu_length (const struct comp_unit_head *header) | |
5351 | { | |
5352 | return header->initial_length_size + header->length; | |
5353 | } | |
5354 | ||
9c541725 | 5355 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 5356 | |
9c541725 PA |
5357 | static inline bool |
5358 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 5359 | { |
9c541725 PA |
5360 | sect_offset bottom = cu_header->sect_off; |
5361 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 5362 | |
9c541725 | 5363 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
5364 | } |
5365 | ||
3b80fe9b DE |
5366 | /* Find the base address of the compilation unit for range lists and |
5367 | location lists. It will normally be specified by DW_AT_low_pc. | |
5368 | In DWARF-3 draft 4, the base address could be overridden by | |
5369 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5370 | compilation units with discontinuous ranges. */ | |
5371 | ||
5372 | static void | |
5373 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5374 | { | |
5375 | struct attribute *attr; | |
5376 | ||
5377 | cu->base_known = 0; | |
5378 | cu->base_address = 0; | |
5379 | ||
5380 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
5381 | if (attr) | |
5382 | { | |
31aa7e4e | 5383 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5384 | cu->base_known = 1; |
5385 | } | |
5386 | else | |
5387 | { | |
5388 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
5389 | if (attr) | |
5390 | { | |
31aa7e4e | 5391 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5392 | cu->base_known = 1; |
5393 | } | |
5394 | } | |
5395 | } | |
5396 | ||
93311388 | 5397 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 5398 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
5399 | NOTE: This leaves members offset, first_die_offset to be filled in |
5400 | by the caller. */ | |
107d2387 | 5401 | |
d521ce57 | 5402 | static const gdb_byte * |
107d2387 | 5403 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
5404 | const gdb_byte *info_ptr, |
5405 | struct dwarf2_section_info *section, | |
5406 | rcuh_kind section_kind) | |
107d2387 AC |
5407 | { |
5408 | int signed_addr; | |
891d2f0b | 5409 | unsigned int bytes_read; |
43988095 JK |
5410 | const char *filename = get_section_file_name (section); |
5411 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
5412 | |
5413 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
5414 | cu_header->initial_length_size = bytes_read; | |
5415 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 5416 | info_ptr += bytes_read; |
107d2387 AC |
5417 | cu_header->version = read_2_bytes (abfd, info_ptr); |
5418 | info_ptr += 2; | |
43988095 JK |
5419 | if (cu_header->version < 5) |
5420 | switch (section_kind) | |
5421 | { | |
5422 | case rcuh_kind::COMPILE: | |
5423 | cu_header->unit_type = DW_UT_compile; | |
5424 | break; | |
5425 | case rcuh_kind::TYPE: | |
5426 | cu_header->unit_type = DW_UT_type; | |
5427 | break; | |
5428 | default: | |
5429 | internal_error (__FILE__, __LINE__, | |
5430 | _("read_comp_unit_head: invalid section_kind")); | |
5431 | } | |
5432 | else | |
5433 | { | |
5434 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
5435 | (read_1_byte (abfd, info_ptr)); | |
5436 | info_ptr += 1; | |
5437 | switch (cu_header->unit_type) | |
5438 | { | |
5439 | case DW_UT_compile: | |
5440 | if (section_kind != rcuh_kind::COMPILE) | |
5441 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5442 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
5443 | filename); | |
5444 | break; | |
5445 | case DW_UT_type: | |
5446 | section_kind = rcuh_kind::TYPE; | |
5447 | break; | |
5448 | default: | |
5449 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5450 | "(is %d, should be %d or %d) [in module %s]"), | |
5451 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
5452 | } | |
5453 | ||
5454 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5455 | info_ptr += 1; | |
5456 | } | |
9c541725 PA |
5457 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
5458 | cu_header, | |
5459 | &bytes_read); | |
613e1657 | 5460 | info_ptr += bytes_read; |
43988095 JK |
5461 | if (cu_header->version < 5) |
5462 | { | |
5463 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5464 | info_ptr += 1; | |
5465 | } | |
107d2387 AC |
5466 | signed_addr = bfd_get_sign_extend_vma (abfd); |
5467 | if (signed_addr < 0) | |
8e65ff28 | 5468 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 5469 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 5470 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 5471 | |
43988095 JK |
5472 | if (section_kind == rcuh_kind::TYPE) |
5473 | { | |
5474 | LONGEST type_offset; | |
5475 | ||
5476 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
5477 | info_ptr += 8; | |
5478 | ||
5479 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
5480 | info_ptr += bytes_read; | |
9c541725 PA |
5481 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
5482 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
5483 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
5484 | "header (is %s) [in module %s]"), plongest (type_offset), | |
5485 | filename); | |
5486 | } | |
5487 | ||
107d2387 AC |
5488 | return info_ptr; |
5489 | } | |
5490 | ||
36586728 TT |
5491 | /* Helper function that returns the proper abbrev section for |
5492 | THIS_CU. */ | |
5493 | ||
5494 | static struct dwarf2_section_info * | |
5495 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5496 | { | |
5497 | struct dwarf2_section_info *abbrev; | |
5498 | ||
5499 | if (this_cu->is_dwz) | |
5500 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
5501 | else | |
5502 | abbrev = &dwarf2_per_objfile->abbrev; | |
5503 | ||
5504 | return abbrev; | |
5505 | } | |
5506 | ||
9ff913ba DE |
5507 | /* Subroutine of read_and_check_comp_unit_head and |
5508 | read_and_check_type_unit_head to simplify them. | |
5509 | Perform various error checking on the header. */ | |
5510 | ||
5511 | static void | |
5512 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
5513 | struct dwarf2_section_info *section, |
5514 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 5515 | { |
a32a8923 | 5516 | const char *filename = get_section_file_name (section); |
9ff913ba | 5517 | |
43988095 | 5518 | if (header->version < 2 || header->version > 5) |
9ff913ba | 5519 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 5520 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
5521 | filename); |
5522 | ||
9c541725 | 5523 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 5524 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
5525 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
5526 | "(offset 0x%x + 6) [in module %s]"), | |
5527 | to_underlying (header->abbrev_sect_off), | |
5528 | to_underlying (header->sect_off), | |
9ff913ba DE |
5529 | filename); |
5530 | ||
9c541725 | 5531 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 5532 | avoid potential 32-bit overflow. */ |
9c541725 | 5533 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 5534 | > section->size) |
9c541725 PA |
5535 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
5536 | "(offset 0x%x + 0) [in module %s]"), | |
5537 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
5538 | filename); |
5539 | } | |
5540 | ||
5541 | /* Read in a CU/TU header and perform some basic error checking. | |
5542 | The contents of the header are stored in HEADER. | |
5543 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 5544 | |
d521ce57 | 5545 | static const gdb_byte * |
9ff913ba DE |
5546 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
5547 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 5548 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 5549 | const gdb_byte *info_ptr, |
43988095 | 5550 | rcuh_kind section_kind) |
72bf9492 | 5551 | { |
d521ce57 | 5552 | const gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 | 5553 | |
9c541725 | 5554 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 5555 | |
43988095 | 5556 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 5557 | |
9c541725 | 5558 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 5559 | |
4bdcc0c1 | 5560 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
5561 | |
5562 | return info_ptr; | |
348e048f DE |
5563 | } |
5564 | ||
f4dc4d17 DE |
5565 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5566 | ||
5567 | static sect_offset | |
5568 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 5569 | sect_offset sect_off) |
f4dc4d17 | 5570 | { |
a32a8923 | 5571 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 5572 | const gdb_byte *info_ptr; |
ac298888 | 5573 | unsigned int initial_length_size, offset_size; |
43988095 | 5574 | uint16_t version; |
f4dc4d17 DE |
5575 | |
5576 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 5577 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5578 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5579 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5580 | info_ptr += initial_length_size; |
5581 | ||
5582 | version = read_2_bytes (abfd, info_ptr); | |
5583 | info_ptr += 2; | |
5584 | if (version >= 5) | |
5585 | { | |
5586 | /* Skip unit type and address size. */ | |
5587 | info_ptr += 2; | |
5588 | } | |
5589 | ||
9c541725 | 5590 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5591 | } |
5592 | ||
aaa75496 JB |
5593 | /* Allocate a new partial symtab for file named NAME and mark this new |
5594 | partial symtab as being an include of PST. */ | |
5595 | ||
5596 | static void | |
d521ce57 | 5597 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
5598 | struct objfile *objfile) |
5599 | { | |
5600 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
5601 | ||
fbd9ab74 JK |
5602 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5603 | { | |
5604 | /* It shares objfile->objfile_obstack. */ | |
5605 | subpst->dirname = pst->dirname; | |
5606 | } | |
5607 | ||
aaa75496 JB |
5608 | subpst->textlow = 0; |
5609 | subpst->texthigh = 0; | |
5610 | ||
8d749320 SM |
5611 | subpst->dependencies |
5612 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
5613 | subpst->dependencies[0] = pst; |
5614 | subpst->number_of_dependencies = 1; | |
5615 | ||
5616 | subpst->globals_offset = 0; | |
5617 | subpst->n_global_syms = 0; | |
5618 | subpst->statics_offset = 0; | |
5619 | subpst->n_static_syms = 0; | |
43f3e411 | 5620 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
5621 | subpst->read_symtab = pst->read_symtab; |
5622 | subpst->readin = 0; | |
5623 | ||
5624 | /* No private part is necessary for include psymtabs. This property | |
5625 | can be used to differentiate between such include psymtabs and | |
10b3939b | 5626 | the regular ones. */ |
58a9656e | 5627 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
5628 | } |
5629 | ||
5630 | /* Read the Line Number Program data and extract the list of files | |
5631 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5632 | partial symtab for each of these included files. */ |
aaa75496 JB |
5633 | |
5634 | static void | |
5635 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
5636 | struct die_info *die, |
5637 | struct partial_symtab *pst) | |
aaa75496 | 5638 | { |
fff8551c | 5639 | line_header_up lh; |
d85a05f0 | 5640 | struct attribute *attr; |
aaa75496 | 5641 | |
d85a05f0 DJ |
5642 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
5643 | if (attr) | |
9c541725 | 5644 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5645 | if (lh == NULL) |
5646 | return; /* No linetable, so no includes. */ | |
5647 | ||
c6da4cef | 5648 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 5649 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
5650 | } |
5651 | ||
348e048f | 5652 | static hashval_t |
52dc124a | 5653 | hash_signatured_type (const void *item) |
348e048f | 5654 | { |
9a3c8263 SM |
5655 | const struct signatured_type *sig_type |
5656 | = (const struct signatured_type *) item; | |
9a619af0 | 5657 | |
348e048f | 5658 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5659 | return sig_type->signature; |
348e048f DE |
5660 | } |
5661 | ||
5662 | static int | |
52dc124a | 5663 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5664 | { |
9a3c8263 SM |
5665 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5666 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5667 | |
348e048f DE |
5668 | return lhs->signature == rhs->signature; |
5669 | } | |
5670 | ||
1fd400ff TT |
5671 | /* Allocate a hash table for signatured types. */ |
5672 | ||
5673 | static htab_t | |
673bfd45 | 5674 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
5675 | { |
5676 | return htab_create_alloc_ex (41, | |
52dc124a DE |
5677 | hash_signatured_type, |
5678 | eq_signatured_type, | |
1fd400ff TT |
5679 | NULL, |
5680 | &objfile->objfile_obstack, | |
5681 | hashtab_obstack_allocate, | |
5682 | dummy_obstack_deallocate); | |
5683 | } | |
5684 | ||
d467dd73 | 5685 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
5686 | |
5687 | static int | |
d467dd73 | 5688 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 5689 | { |
9a3c8263 SM |
5690 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
5691 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 5692 | |
b4dd5633 | 5693 | **datap = sigt; |
1fd400ff TT |
5694 | ++*datap; |
5695 | ||
5696 | return 1; | |
5697 | } | |
5698 | ||
78d4d2c5 | 5699 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
5700 | and fill them into TYPES_HTAB. It will process only type units, |
5701 | therefore DW_UT_type. */ | |
c88ee1f0 | 5702 | |
78d4d2c5 JK |
5703 | static void |
5704 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
5705 | dwarf2_section_info *section, htab_t &types_htab, |
5706 | rcuh_kind section_kind) | |
348e048f | 5707 | { |
3019eac3 | 5708 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 5709 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
5710 | bfd *abfd; |
5711 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 5712 | |
4bdcc0c1 DE |
5713 | abbrev_section = (dwo_file != NULL |
5714 | ? &dwo_file->sections.abbrev | |
5715 | : &dwarf2_per_objfile->abbrev); | |
5716 | ||
b4f54984 | 5717 | if (dwarf_read_debug) |
43988095 JK |
5718 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
5719 | get_section_name (section), | |
a32a8923 | 5720 | get_section_file_name (abbrev_section)); |
09406207 | 5721 | |
78d4d2c5 JK |
5722 | dwarf2_read_section (objfile, section); |
5723 | info_ptr = section->buffer; | |
348e048f | 5724 | |
78d4d2c5 JK |
5725 | if (info_ptr == NULL) |
5726 | return; | |
348e048f | 5727 | |
78d4d2c5 JK |
5728 | /* We can't set abfd until now because the section may be empty or |
5729 | not present, in which case the bfd is unknown. */ | |
5730 | abfd = get_section_bfd_owner (section); | |
348e048f | 5731 | |
78d4d2c5 JK |
5732 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
5733 | because we don't need to read any dies: the signature is in the | |
5734 | header. */ | |
3019eac3 | 5735 | |
78d4d2c5 JK |
5736 | end_ptr = info_ptr + section->size; |
5737 | while (info_ptr < end_ptr) | |
5738 | { | |
78d4d2c5 JK |
5739 | struct signatured_type *sig_type; |
5740 | struct dwo_unit *dwo_tu; | |
5741 | void **slot; | |
5742 | const gdb_byte *ptr = info_ptr; | |
5743 | struct comp_unit_head header; | |
5744 | unsigned int length; | |
8b70b953 | 5745 | |
9c541725 | 5746 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 5747 | |
a49dd8dd JK |
5748 | /* Initialize it due to a false compiler warning. */ |
5749 | header.signature = -1; | |
9c541725 | 5750 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 5751 | |
78d4d2c5 JK |
5752 | /* We need to read the type's signature in order to build the hash |
5753 | table, but we don't need anything else just yet. */ | |
348e048f | 5754 | |
43988095 JK |
5755 | ptr = read_and_check_comp_unit_head (&header, section, |
5756 | abbrev_section, ptr, section_kind); | |
348e048f | 5757 | |
78d4d2c5 | 5758 | length = get_cu_length (&header); |
6caca83c | 5759 | |
78d4d2c5 JK |
5760 | /* Skip dummy type units. */ |
5761 | if (ptr >= info_ptr + length | |
43988095 JK |
5762 | || peek_abbrev_code (abfd, ptr) == 0 |
5763 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
5764 | { |
5765 | info_ptr += length; | |
5766 | continue; | |
5767 | } | |
dee91e82 | 5768 | |
78d4d2c5 JK |
5769 | if (types_htab == NULL) |
5770 | { | |
5771 | if (dwo_file) | |
5772 | types_htab = allocate_dwo_unit_table (objfile); | |
5773 | else | |
5774 | types_htab = allocate_signatured_type_table (objfile); | |
5775 | } | |
8b70b953 | 5776 | |
78d4d2c5 JK |
5777 | if (dwo_file) |
5778 | { | |
5779 | sig_type = NULL; | |
5780 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5781 | struct dwo_unit); | |
5782 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 5783 | dwo_tu->signature = header.signature; |
9c541725 | 5784 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 5785 | dwo_tu->section = section; |
9c541725 | 5786 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
5787 | dwo_tu->length = length; |
5788 | } | |
5789 | else | |
5790 | { | |
5791 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
5792 | The real type_offset is in the DWO file. */ | |
5793 | dwo_tu = NULL; | |
5794 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5795 | struct signatured_type); | |
43988095 | 5796 | sig_type->signature = header.signature; |
9c541725 | 5797 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
5798 | sig_type->per_cu.objfile = objfile; |
5799 | sig_type->per_cu.is_debug_types = 1; | |
5800 | sig_type->per_cu.section = section; | |
9c541725 | 5801 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
5802 | sig_type->per_cu.length = length; |
5803 | } | |
5804 | ||
5805 | slot = htab_find_slot (types_htab, | |
5806 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
5807 | INSERT); | |
5808 | gdb_assert (slot != NULL); | |
5809 | if (*slot != NULL) | |
5810 | { | |
9c541725 | 5811 | sect_offset dup_sect_off; |
0349ea22 | 5812 | |
3019eac3 DE |
5813 | if (dwo_file) |
5814 | { | |
78d4d2c5 JK |
5815 | const struct dwo_unit *dup_tu |
5816 | = (const struct dwo_unit *) *slot; | |
5817 | ||
9c541725 | 5818 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
5819 | } |
5820 | else | |
5821 | { | |
78d4d2c5 JK |
5822 | const struct signatured_type *dup_tu |
5823 | = (const struct signatured_type *) *slot; | |
5824 | ||
9c541725 | 5825 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 5826 | } |
8b70b953 | 5827 | |
78d4d2c5 JK |
5828 | complaint (&symfile_complaints, |
5829 | _("debug type entry at offset 0x%x is duplicate to" | |
5830 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 5831 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 5832 | hex_string (header.signature)); |
78d4d2c5 JK |
5833 | } |
5834 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 5835 | |
78d4d2c5 JK |
5836 | if (dwarf_read_debug > 1) |
5837 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 5838 | to_underlying (sect_off), |
43988095 | 5839 | hex_string (header.signature)); |
3019eac3 | 5840 | |
78d4d2c5 JK |
5841 | info_ptr += length; |
5842 | } | |
5843 | } | |
3019eac3 | 5844 | |
78d4d2c5 JK |
5845 | /* Create the hash table of all entries in the .debug_types |
5846 | (or .debug_types.dwo) section(s). | |
5847 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
5848 | otherwise it is NULL. | |
b3c8eb43 | 5849 | |
78d4d2c5 | 5850 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 5851 | |
78d4d2c5 | 5852 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 5853 | |
78d4d2c5 JK |
5854 | static void |
5855 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
5856 | VEC (dwarf2_section_info_def) *types, | |
5857 | htab_t &types_htab) | |
5858 | { | |
5859 | int ix; | |
5860 | struct dwarf2_section_info *section; | |
5861 | ||
5862 | if (VEC_empty (dwarf2_section_info_def, types)) | |
5863 | return; | |
348e048f | 5864 | |
78d4d2c5 JK |
5865 | for (ix = 0; |
5866 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5867 | ++ix) | |
43988095 JK |
5868 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5869 | rcuh_kind::TYPE); | |
3019eac3 DE |
5870 | } |
5871 | ||
5872 | /* Create the hash table of all entries in the .debug_types section, | |
5873 | and initialize all_type_units. | |
5874 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5875 | otherwise non-zero. */ | |
5876 | ||
5877 | static int | |
5878 | create_all_type_units (struct objfile *objfile) | |
5879 | { | |
78d4d2c5 | 5880 | htab_t types_htab = NULL; |
b4dd5633 | 5881 | struct signatured_type **iter; |
3019eac3 | 5882 | |
43988095 JK |
5883 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5884 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5885 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5886 | if (types_htab == NULL) |
5887 | { | |
5888 | dwarf2_per_objfile->signatured_types = NULL; | |
5889 | return 0; | |
5890 | } | |
5891 | ||
348e048f DE |
5892 | dwarf2_per_objfile->signatured_types = types_htab; |
5893 | ||
6aa5f3a6 DE |
5894 | dwarf2_per_objfile->n_type_units |
5895 | = dwarf2_per_objfile->n_allocated_type_units | |
5896 | = htab_elements (types_htab); | |
8d749320 SM |
5897 | dwarf2_per_objfile->all_type_units = |
5898 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5899 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5900 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5901 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5902 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5903 | |
348e048f DE |
5904 | return 1; |
5905 | } | |
5906 | ||
6aa5f3a6 DE |
5907 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5908 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5909 | Otherwise we find one. */ | |
5910 | ||
5911 | static struct signatured_type * | |
5912 | add_type_unit (ULONGEST sig, void **slot) | |
5913 | { | |
5914 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5915 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5916 | struct signatured_type *sig_type; | |
5917 | ||
5918 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5919 | ++n_type_units; | |
5920 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5921 | { | |
5922 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5923 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5924 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5925 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5926 | = XRESIZEVEC (struct signatured_type *, |
5927 | dwarf2_per_objfile->all_type_units, | |
5928 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5929 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5930 | } | |
5931 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5932 | ||
5933 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5934 | struct signatured_type); | |
5935 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5936 | sig_type->signature = sig; | |
5937 | sig_type->per_cu.is_debug_types = 1; | |
5938 | if (dwarf2_per_objfile->using_index) | |
5939 | { | |
5940 | sig_type->per_cu.v.quick = | |
5941 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5942 | struct dwarf2_per_cu_quick_data); | |
5943 | } | |
5944 | ||
5945 | if (slot == NULL) | |
5946 | { | |
5947 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5948 | sig_type, INSERT); | |
5949 | } | |
5950 | gdb_assert (*slot == NULL); | |
5951 | *slot = sig_type; | |
5952 | /* The rest of sig_type must be filled in by the caller. */ | |
5953 | return sig_type; | |
5954 | } | |
5955 | ||
a2ce51a0 DE |
5956 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5957 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5958 | ||
5959 | static void | |
5960 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5961 | struct signatured_type *sig_entry, | |
5962 | struct dwo_unit *dwo_entry) | |
5963 | { | |
7ee85ab1 | 5964 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5965 | gdb_assert (! sig_entry->per_cu.queued); |
5966 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5967 | if (dwarf2_per_objfile->using_index) |
5968 | { | |
5969 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5970 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5971 | } |
5972 | else | |
5973 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5974 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5975 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5976 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5977 | gdb_assert (sig_entry->dwo_unit == NULL); |
5978 | ||
5979 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5980 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5981 | sig_entry->per_cu.length = dwo_entry->length; |
5982 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5983 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5984 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5985 | sig_entry->dwo_unit = dwo_entry; | |
5986 | } | |
5987 | ||
5988 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5989 | If we haven't read the TU yet, create the signatured_type data structure |
5990 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5991 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5992 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5993 | containing that CU. Otherwise we could end up reading several other DWO | |
5994 | files (due to comdat folding) to process the transitive closure of all the | |
5995 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5996 | type signature that it needs. | |
a2ce51a0 DE |
5997 | We only do this for .gdb_index because in the psymtab case we already have |
5998 | to read all the DWOs to build the type unit groups. */ | |
5999 | ||
6000 | static struct signatured_type * | |
6001 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6002 | { | |
6003 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6004 | struct dwo_file *dwo_file; | |
6005 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6006 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6007 | void **slot; |
a2ce51a0 DE |
6008 | |
6009 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6010 | ||
6aa5f3a6 DE |
6011 | /* If TU skeletons have been removed then we may not have read in any |
6012 | TUs yet. */ | |
6013 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6014 | { | |
6015 | dwarf2_per_objfile->signatured_types | |
6016 | = allocate_signatured_type_table (objfile); | |
6017 | } | |
a2ce51a0 DE |
6018 | |
6019 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6020 | Use the global signatured_types array to do our own comdat-folding |
6021 | of types. If this is the first time we're reading this TU, and | |
6022 | the TU has an entry in .gdb_index, replace the recorded data from | |
6023 | .gdb_index with this TU. */ | |
a2ce51a0 | 6024 | |
a2ce51a0 | 6025 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
6026 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
6027 | &find_sig_entry, INSERT); | |
9a3c8263 | 6028 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6029 | |
6030 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6031 | read. Don't reassign the global entry to point to this DWO if that's |
6032 | the case. Also note that if the TU is already being read, it may not | |
6033 | have come from a DWO, the program may be a mix of Fission-compiled | |
6034 | code and non-Fission-compiled code. */ | |
6035 | ||
6036 | /* Have we already tried to read this TU? | |
6037 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6038 | needn't exist in the global table yet). */ | |
6039 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6040 | return sig_entry; |
6041 | ||
6aa5f3a6 DE |
6042 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6043 | dwo_unit of the TU itself. */ | |
6044 | dwo_file = cu->dwo_unit->dwo_file; | |
6045 | ||
a2ce51a0 DE |
6046 | /* Ok, this is the first time we're reading this TU. */ |
6047 | if (dwo_file->tus == NULL) | |
6048 | return NULL; | |
6049 | find_dwo_entry.signature = sig; | |
9a3c8263 | 6050 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
6051 | if (dwo_entry == NULL) |
6052 | return NULL; | |
6053 | ||
6aa5f3a6 DE |
6054 | /* If the global table doesn't have an entry for this TU, add one. */ |
6055 | if (sig_entry == NULL) | |
6056 | sig_entry = add_type_unit (sig, slot); | |
6057 | ||
a2ce51a0 | 6058 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 6059 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6060 | return sig_entry; |
6061 | } | |
6062 | ||
a2ce51a0 DE |
6063 | /* Subroutine of lookup_signatured_type. |
6064 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6065 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6066 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6067 | |
6068 | static struct signatured_type * | |
6069 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6070 | { | |
6071 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6072 | struct dwp_file *dwp_file = get_dwp_file (); | |
6073 | struct dwo_unit *dwo_entry; | |
6074 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6075 | void **slot; |
a2ce51a0 DE |
6076 | |
6077 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6078 | gdb_assert (dwp_file != NULL); | |
6079 | ||
6aa5f3a6 DE |
6080 | /* If TU skeletons have been removed then we may not have read in any |
6081 | TUs yet. */ | |
6082 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 6083 | { |
6aa5f3a6 DE |
6084 | dwarf2_per_objfile->signatured_types |
6085 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
6086 | } |
6087 | ||
6aa5f3a6 DE |
6088 | find_sig_entry.signature = sig; |
6089 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6090 | &find_sig_entry, INSERT); | |
9a3c8263 | 6091 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6092 | |
6093 | /* Have we already tried to read this TU? | |
6094 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6095 | needn't exist in the global table yet). */ | |
6096 | if (sig_entry != NULL) | |
6097 | return sig_entry; | |
6098 | ||
a2ce51a0 DE |
6099 | if (dwp_file->tus == NULL) |
6100 | return NULL; | |
57d63ce2 DE |
6101 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
6102 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
6103 | if (dwo_entry == NULL) |
6104 | return NULL; | |
6105 | ||
6aa5f3a6 | 6106 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
6107 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
6108 | ||
a2ce51a0 DE |
6109 | return sig_entry; |
6110 | } | |
6111 | ||
380bca97 | 6112 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6113 | Returns NULL if signature SIG is not present in the table. |
6114 | It is up to the caller to complain about this. */ | |
348e048f DE |
6115 | |
6116 | static struct signatured_type * | |
a2ce51a0 | 6117 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6118 | { |
a2ce51a0 DE |
6119 | if (cu->dwo_unit |
6120 | && dwarf2_per_objfile->using_index) | |
6121 | { | |
6122 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6123 | These cases require special processing. */ | |
6124 | if (get_dwp_file () == NULL) | |
6125 | return lookup_dwo_signatured_type (cu, sig); | |
6126 | else | |
6127 | return lookup_dwp_signatured_type (cu, sig); | |
6128 | } | |
6129 | else | |
6130 | { | |
6131 | struct signatured_type find_entry, *entry; | |
348e048f | 6132 | |
a2ce51a0 DE |
6133 | if (dwarf2_per_objfile->signatured_types == NULL) |
6134 | return NULL; | |
6135 | find_entry.signature = sig; | |
9a3c8263 SM |
6136 | entry = ((struct signatured_type *) |
6137 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
6138 | return entry; |
6139 | } | |
348e048f | 6140 | } |
42e7ad6c DE |
6141 | \f |
6142 | /* Low level DIE reading support. */ | |
348e048f | 6143 | |
d85a05f0 DJ |
6144 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6145 | ||
6146 | static void | |
6147 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6148 | struct dwarf2_cu *cu, |
3019eac3 DE |
6149 | struct dwarf2_section_info *section, |
6150 | struct dwo_file *dwo_file) | |
d85a05f0 | 6151 | { |
fceca515 | 6152 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 6153 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 6154 | reader->cu = cu; |
3019eac3 | 6155 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6156 | reader->die_section = section; |
6157 | reader->buffer = section->buffer; | |
f664829e | 6158 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 6159 | reader->comp_dir = NULL; |
d85a05f0 DJ |
6160 | } |
6161 | ||
b0c7bfa9 DE |
6162 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6163 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
6164 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
6165 | already. | |
6166 | ||
6167 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6168 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6169 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6170 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6171 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6172 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
6173 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
6174 | are filled in with the info of the DIE from the DWO file. | |
6175 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
6176 | provided an abbrev table to use. | |
6177 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
6178 | ||
6179 | static int | |
6180 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
6181 | struct dwo_unit *dwo_unit, | |
6182 | int abbrev_table_provided, | |
6183 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 6184 | const char *stub_comp_dir, |
b0c7bfa9 | 6185 | struct die_reader_specs *result_reader, |
d521ce57 | 6186 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
6187 | struct die_info **result_comp_unit_die, |
6188 | int *result_has_children) | |
6189 | { | |
6190 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6191 | struct dwarf2_cu *cu = this_cu->cu; | |
6192 | struct dwarf2_section_info *section; | |
6193 | bfd *abfd; | |
d521ce57 | 6194 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6195 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
6196 | int i,num_extra_attrs; | |
6197 | struct dwarf2_section_info *dwo_abbrev_section; | |
6198 | struct attribute *attr; | |
6199 | struct die_info *comp_unit_die; | |
6200 | ||
b0aeadb3 DE |
6201 | /* At most one of these may be provided. */ |
6202 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6203 | |
b0c7bfa9 DE |
6204 | /* These attributes aren't processed until later: |
6205 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6206 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6207 | referenced later. However, these attributes are found in the stub | |
6208 | which we won't have later. In order to not impose this complication | |
6209 | on the rest of the code, we read them here and copy them to the | |
6210 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6211 | |
6212 | stmt_list = NULL; | |
6213 | low_pc = NULL; | |
6214 | high_pc = NULL; | |
6215 | ranges = NULL; | |
6216 | comp_dir = NULL; | |
6217 | ||
6218 | if (stub_comp_unit_die != NULL) | |
6219 | { | |
6220 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6221 | DWO file. */ | |
6222 | if (! this_cu->is_debug_types) | |
6223 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
6224 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6225 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6226 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6227 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6228 | ||
6229 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
6230 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
6231 | cu->addr_base = 0; | |
6232 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
6233 | if (attr) | |
6234 | cu->addr_base = DW_UNSND (attr); | |
6235 | ||
6236 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
6237 | We need the value before we can process DW_AT_ranges. */ | |
6238 | cu->ranges_base = 0; | |
6239 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
6240 | if (attr) | |
6241 | cu->ranges_base = DW_UNSND (attr); | |
6242 | } | |
a2ce51a0 DE |
6243 | else if (stub_comp_dir != NULL) |
6244 | { | |
6245 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 6246 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6247 | comp_dir->name = DW_AT_comp_dir; |
6248 | comp_dir->form = DW_FORM_string; | |
6249 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
6250 | DW_STRING (comp_dir) = stub_comp_dir; | |
6251 | } | |
b0c7bfa9 DE |
6252 | |
6253 | /* Set up for reading the DWO CU/TU. */ | |
6254 | cu->dwo_unit = dwo_unit; | |
6255 | section = dwo_unit->section; | |
6256 | dwarf2_read_section (objfile, section); | |
a32a8923 | 6257 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
6258 | begin_info_ptr = info_ptr = (section->buffer |
6259 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
6260 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
6261 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
6262 | ||
6263 | if (this_cu->is_debug_types) | |
6264 | { | |
b0c7bfa9 DE |
6265 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
6266 | ||
43988095 | 6267 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 6268 | dwo_abbrev_section, |
43988095 | 6269 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6270 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6271 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6272 | { |
6273 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
6274 | " TU at offset 0x%x [in module %s]"), | |
6275 | hex_string (sig_type->signature), | |
43988095 | 6276 | hex_string (cu->header.signature), |
9c541725 | 6277 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
6278 | bfd_get_filename (abfd)); |
6279 | } | |
9c541725 | 6280 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6281 | /* For DWOs coming from DWP files, we don't know the CU length |
6282 | nor the type's offset in the TU until now. */ | |
6283 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 6284 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6285 | |
6286 | /* Establish the type offset that can be used to lookup the type. | |
6287 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6288 | sig_type->type_offset_in_section |
6289 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6290 | } |
6291 | else | |
6292 | { | |
6293 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
6294 | dwo_abbrev_section, | |
43988095 | 6295 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6296 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6297 | /* For DWOs coming from DWP files, we don't know the CU length |
6298 | until now. */ | |
6299 | dwo_unit->length = get_cu_length (&cu->header); | |
6300 | } | |
6301 | ||
02142a6c DE |
6302 | /* Replace the CU's original abbrev table with the DWO's. |
6303 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
6304 | if (abbrev_table_provided) |
6305 | { | |
6306 | /* Don't free the provided abbrev table, the caller of | |
6307 | init_cutu_and_read_dies owns it. */ | |
6308 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6309 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
6310 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6311 | } | |
6312 | else | |
6313 | { | |
6314 | dwarf2_free_abbrev_table (cu); | |
6315 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6316 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
6317 | } |
6318 | ||
6319 | /* Read in the die, but leave space to copy over the attributes | |
6320 | from the stub. This has the benefit of simplifying the rest of | |
6321 | the code - all the work to maintain the illusion of a single | |
6322 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6323 | num_extra_attrs = ((stmt_list != NULL) | |
6324 | + (low_pc != NULL) | |
6325 | + (high_pc != NULL) | |
6326 | + (ranges != NULL) | |
6327 | + (comp_dir != NULL)); | |
6328 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
6329 | result_has_children, num_extra_attrs); | |
6330 | ||
6331 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6332 | comp_unit_die = *result_comp_unit_die; | |
6333 | i = comp_unit_die->num_attrs; | |
6334 | if (stmt_list != NULL) | |
6335 | comp_unit_die->attrs[i++] = *stmt_list; | |
6336 | if (low_pc != NULL) | |
6337 | comp_unit_die->attrs[i++] = *low_pc; | |
6338 | if (high_pc != NULL) | |
6339 | comp_unit_die->attrs[i++] = *high_pc; | |
6340 | if (ranges != NULL) | |
6341 | comp_unit_die->attrs[i++] = *ranges; | |
6342 | if (comp_dir != NULL) | |
6343 | comp_unit_die->attrs[i++] = *comp_dir; | |
6344 | comp_unit_die->num_attrs += num_extra_attrs; | |
6345 | ||
b4f54984 | 6346 | if (dwarf_die_debug) |
bf6af496 DE |
6347 | { |
6348 | fprintf_unfiltered (gdb_stdlog, | |
6349 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 6350 | get_section_name (section), |
bf6af496 DE |
6351 | (unsigned) (begin_info_ptr - section->buffer), |
6352 | bfd_get_filename (abfd)); | |
b4f54984 | 6353 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6354 | } |
6355 | ||
a2ce51a0 DE |
6356 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
6357 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
6358 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
6359 | to get it via circuitous means. Blech. */ | |
6360 | if (comp_dir != NULL) | |
6361 | result_reader->comp_dir = DW_STRING (comp_dir); | |
6362 | ||
b0c7bfa9 DE |
6363 | /* Skip dummy compilation units. */ |
6364 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6365 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6366 | return 0; | |
6367 | ||
6368 | *result_info_ptr = info_ptr; | |
6369 | return 1; | |
6370 | } | |
6371 | ||
6372 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
6373 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 6374 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6375 | |
6376 | static struct dwo_unit * | |
6377 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
6378 | struct die_info *comp_unit_die) | |
6379 | { | |
6380 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 DE |
6381 | ULONGEST signature; |
6382 | struct dwo_unit *dwo_unit; | |
6383 | const char *comp_dir, *dwo_name; | |
6384 | ||
a2ce51a0 DE |
6385 | gdb_assert (cu != NULL); |
6386 | ||
b0c7bfa9 | 6387 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
6388 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6389 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
6390 | |
6391 | if (this_cu->is_debug_types) | |
6392 | { | |
6393 | struct signatured_type *sig_type; | |
6394 | ||
6395 | /* Since this_cu is the first member of struct signatured_type, | |
6396 | we can go from a pointer to one to a pointer to the other. */ | |
6397 | sig_type = (struct signatured_type *) this_cu; | |
6398 | signature = sig_type->signature; | |
6399 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
6400 | } | |
6401 | else | |
6402 | { | |
6403 | struct attribute *attr; | |
6404 | ||
6405 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6406 | if (! attr) | |
6407 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
6408 | " [in module %s]"), | |
4262abfb | 6409 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
6410 | signature = DW_UNSND (attr); |
6411 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
6412 | signature); | |
6413 | } | |
6414 | ||
b0c7bfa9 DE |
6415 | return dwo_unit; |
6416 | } | |
6417 | ||
a2ce51a0 | 6418 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
6419 | See it for a description of the parameters. |
6420 | Read a TU directly from a DWO file, bypassing the stub. | |
6421 | ||
6422 | Note: This function could be a little bit simpler if we shared cleanups | |
6423 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
6424 | to do, so we keep this function self-contained. Or we could move this | |
6425 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
6426 | |
6427 | static void | |
6aa5f3a6 DE |
6428 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
6429 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
6430 | die_reader_func_ftype *die_reader_func, |
6431 | void *data) | |
6432 | { | |
6433 | struct dwarf2_cu *cu; | |
6434 | struct signatured_type *sig_type; | |
6aa5f3a6 | 6435 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
6436 | struct die_reader_specs reader; |
6437 | const gdb_byte *info_ptr; | |
6438 | struct die_info *comp_unit_die; | |
6439 | int has_children; | |
6440 | ||
6441 | /* Verify we can do the following downcast, and that we have the | |
6442 | data we need. */ | |
6443 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6444 | sig_type = (struct signatured_type *) this_cu; | |
6445 | gdb_assert (sig_type->dwo_unit != NULL); | |
6446 | ||
6447 | cleanups = make_cleanup (null_cleanup, NULL); | |
6448 | ||
6aa5f3a6 DE |
6449 | if (use_existing_cu && this_cu->cu != NULL) |
6450 | { | |
6451 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6452 | cu = this_cu->cu; | |
6453 | /* There's no need to do the rereading_dwo_cu handling that | |
6454 | init_cutu_and_read_dies does since we don't read the stub. */ | |
6455 | } | |
6456 | else | |
6457 | { | |
6458 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6459 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6460 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
6461 | init_one_comp_unit (cu, this_cu); |
6462 | /* If an error occurs while loading, release our storage. */ | |
6463 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
6464 | } | |
6465 | ||
6466 | /* A future optimization, if needed, would be to use an existing | |
6467 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6468 | could share abbrev tables. */ | |
a2ce51a0 DE |
6469 | |
6470 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
6471 | 0 /* abbrev_table_provided */, | |
6472 | NULL /* stub_comp_unit_die */, | |
6473 | sig_type->dwo_unit->dwo_file->comp_dir, | |
6474 | &reader, &info_ptr, | |
6475 | &comp_unit_die, &has_children) == 0) | |
6476 | { | |
6477 | /* Dummy die. */ | |
6478 | do_cleanups (cleanups); | |
6479 | return; | |
6480 | } | |
6481 | ||
6482 | /* All the "real" work is done here. */ | |
6483 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6484 | ||
6aa5f3a6 | 6485 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
6486 | but the alternative is making the latter more complex. |
6487 | This function is only for the special case of using DWO files directly: | |
6488 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 6489 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 6490 | { |
6aa5f3a6 DE |
6491 | if (keep) |
6492 | { | |
6493 | /* We've successfully allocated this compilation unit. Let our | |
6494 | caller clean it up when finished with it. */ | |
6495 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6496 | |
6aa5f3a6 DE |
6497 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6498 | So we have to manually free the abbrev table. */ | |
6499 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 6500 | |
6aa5f3a6 DE |
6501 | /* Link this CU into read_in_chain. */ |
6502 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6503 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6504 | } | |
6505 | else | |
6506 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6507 | } |
a2ce51a0 DE |
6508 | |
6509 | do_cleanups (cleanups); | |
6510 | } | |
6511 | ||
fd820528 | 6512 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6513 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6514 | |
f4dc4d17 DE |
6515 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6516 | Otherwise the table specified in the comp unit header is read in and used. | |
6517 | This is an optimization for when we already have the abbrev table. | |
6518 | ||
dee91e82 DE |
6519 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6520 | Otherwise, a new CU is allocated with xmalloc. | |
6521 | ||
6522 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
6523 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
6524 | ||
6525 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 6526 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 6527 | |
70221824 | 6528 | static void |
fd820528 | 6529 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 6530 | struct abbrev_table *abbrev_table, |
fd820528 DE |
6531 | int use_existing_cu, int keep, |
6532 | die_reader_func_ftype *die_reader_func, | |
6533 | void *data) | |
c906108c | 6534 | { |
dee91e82 | 6535 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6536 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6537 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 6538 | struct dwarf2_cu *cu; |
d521ce57 | 6539 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 6540 | struct die_reader_specs reader; |
d85a05f0 | 6541 | struct die_info *comp_unit_die; |
dee91e82 | 6542 | int has_children; |
d85a05f0 | 6543 | struct attribute *attr; |
365156ad | 6544 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 6545 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6546 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6547 | /* Non-zero if CU currently points to a DWO file and we need to |
6548 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6549 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6550 | int rereading_dwo_cu = 0; |
c906108c | 6551 | |
b4f54984 | 6552 | if (dwarf_die_debug) |
09406207 DE |
6553 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6554 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6555 | to_underlying (this_cu->sect_off)); |
09406207 | 6556 | |
dee91e82 DE |
6557 | if (use_existing_cu) |
6558 | gdb_assert (keep); | |
23745b47 | 6559 | |
a2ce51a0 DE |
6560 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6561 | file (instead of going through the stub), short-circuit all of this. */ | |
6562 | if (this_cu->reading_dwo_directly) | |
6563 | { | |
6564 | /* Narrow down the scope of possibilities to have to understand. */ | |
6565 | gdb_assert (this_cu->is_debug_types); | |
6566 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
6567 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
6568 | die_reader_func, data); | |
a2ce51a0 DE |
6569 | return; |
6570 | } | |
6571 | ||
dee91e82 DE |
6572 | cleanups = make_cleanup (null_cleanup, NULL); |
6573 | ||
6574 | /* This is cheap if the section is already read in. */ | |
6575 | dwarf2_read_section (objfile, section); | |
6576 | ||
9c541725 | 6577 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6578 | |
6579 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6580 | |
6581 | if (use_existing_cu && this_cu->cu != NULL) | |
6582 | { | |
6583 | cu = this_cu->cu; | |
42e7ad6c DE |
6584 | /* If this CU is from a DWO file we need to start over, we need to |
6585 | refetch the attributes from the skeleton CU. | |
6586 | This could be optimized by retrieving those attributes from when we | |
6587 | were here the first time: the previous comp_unit_die was stored in | |
6588 | comp_unit_obstack. But there's no data yet that we need this | |
6589 | optimization. */ | |
6590 | if (cu->dwo_unit != NULL) | |
6591 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6592 | } |
6593 | else | |
6594 | { | |
6595 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6596 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6597 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 6598 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 6599 | /* If an error occurs while loading, release our storage. */ |
365156ad | 6600 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 6601 | } |
dee91e82 | 6602 | |
b0c7bfa9 | 6603 | /* Get the header. */ |
9c541725 | 6604 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6605 | { |
6606 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6607 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6608 | } |
6609 | else | |
6610 | { | |
3019eac3 | 6611 | if (this_cu->is_debug_types) |
dee91e82 | 6612 | { |
43988095 | 6613 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 6614 | abbrev_section, info_ptr, |
43988095 | 6615 | rcuh_kind::TYPE); |
dee91e82 | 6616 | |
42e7ad6c DE |
6617 | /* Since per_cu is the first member of struct signatured_type, |
6618 | we can go from a pointer to one to a pointer to the other. */ | |
6619 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6620 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6621 | gdb_assert (sig_type->type_offset_in_tu |
6622 | == cu->header.type_cu_offset_in_tu); | |
6623 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6624 | |
42e7ad6c DE |
6625 | /* LENGTH has not been set yet for type units if we're |
6626 | using .gdb_index. */ | |
1ce1cefd | 6627 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
6628 | |
6629 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6630 | sig_type->type_offset_in_section = |
6631 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6632 | |
6633 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6634 | } |
6635 | else | |
6636 | { | |
4bdcc0c1 DE |
6637 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
6638 | abbrev_section, | |
43988095 JK |
6639 | info_ptr, |
6640 | rcuh_kind::COMPILE); | |
dee91e82 | 6641 | |
9c541725 | 6642 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 6643 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 6644 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6645 | } |
6646 | } | |
10b3939b | 6647 | |
6caca83c | 6648 | /* Skip dummy compilation units. */ |
dee91e82 | 6649 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
6650 | || peek_abbrev_code (abfd, info_ptr) == 0) |
6651 | { | |
dee91e82 | 6652 | do_cleanups (cleanups); |
21b2bd31 | 6653 | return; |
6caca83c CC |
6654 | } |
6655 | ||
433df2d4 DE |
6656 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6657 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
6658 | done. Note that it's important that if the CU had an abbrev table |
6659 | on entry we don't free it when we're done: Somewhere up the call stack | |
6660 | it may be in use. */ | |
f4dc4d17 DE |
6661 | if (abbrev_table != NULL) |
6662 | { | |
6663 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 6664 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
6665 | cu->abbrev_table = abbrev_table; |
6666 | } | |
6667 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 6668 | { |
4bdcc0c1 | 6669 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
6670 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6671 | } | |
42e7ad6c DE |
6672 | else if (rereading_dwo_cu) |
6673 | { | |
6674 | dwarf2_free_abbrev_table (cu); | |
6675 | dwarf2_read_abbrevs (cu, abbrev_section); | |
6676 | } | |
af703f96 | 6677 | |
dee91e82 | 6678 | /* Read the top level CU/TU die. */ |
3019eac3 | 6679 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 6680 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 6681 | |
b0c7bfa9 DE |
6682 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
6683 | from the DWO file. | |
6684 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
6685 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
6686 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6687 | if (attr) | |
6688 | { | |
3019eac3 | 6689 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6690 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
6691 | |
6692 | if (has_children) | |
6a506a2d DE |
6693 | { |
6694 | complaint (&symfile_complaints, | |
6695 | _("compilation unit with DW_AT_GNU_dwo_name" | |
6696 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 6697 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 6698 | } |
b0c7bfa9 | 6699 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 6700 | if (dwo_unit != NULL) |
3019eac3 | 6701 | { |
6a506a2d DE |
6702 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
6703 | abbrev_table != NULL, | |
a2ce51a0 | 6704 | comp_unit_die, NULL, |
6a506a2d DE |
6705 | &reader, &info_ptr, |
6706 | &dwo_comp_unit_die, &has_children) == 0) | |
6707 | { | |
6708 | /* Dummy die. */ | |
6709 | do_cleanups (cleanups); | |
6710 | return; | |
6711 | } | |
6712 | comp_unit_die = dwo_comp_unit_die; | |
6713 | } | |
6714 | else | |
6715 | { | |
6716 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6717 | the stub. A complaint has already been logged. There's | |
6718 | not much more we can do except pass on the stub DIE to | |
6719 | die_reader_func. We don't want to throw an error on bad | |
6720 | debug info. */ | |
3019eac3 DE |
6721 | } |
6722 | } | |
6723 | ||
b0c7bfa9 | 6724 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
6725 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
6726 | ||
b0c7bfa9 | 6727 | /* Done, clean up. */ |
365156ad | 6728 | if (free_cu_cleanup != NULL) |
348e048f | 6729 | { |
365156ad TT |
6730 | if (keep) |
6731 | { | |
6732 | /* We've successfully allocated this compilation unit. Let our | |
6733 | caller clean it up when finished with it. */ | |
6734 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 6735 | |
365156ad TT |
6736 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6737 | So we have to manually free the abbrev table. */ | |
6738 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 6739 | |
365156ad TT |
6740 | /* Link this CU into read_in_chain. */ |
6741 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6742 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6743 | } | |
6744 | else | |
6745 | do_cleanups (free_cu_cleanup); | |
348e048f | 6746 | } |
365156ad TT |
6747 | |
6748 | do_cleanups (cleanups); | |
dee91e82 DE |
6749 | } |
6750 | ||
33e80786 DE |
6751 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
6752 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
6753 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6754 | |
6755 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6756 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6757 | |
6758 | We fill in THIS_CU->length. | |
6759 | ||
6760 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
6761 | linker) then DIE_READER_FUNC will not get called. | |
6762 | ||
6763 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6764 | This is done in order to not leave THIS_CU->cu in a state where we have |
6765 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
6766 | |
6767 | static void | |
6768 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 6769 | struct dwo_file *dwo_file, |
dee91e82 DE |
6770 | die_reader_func_ftype *die_reader_func, |
6771 | void *data) | |
6772 | { | |
6773 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 6774 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6775 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 6776 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 6777 | struct dwarf2_cu cu; |
d521ce57 | 6778 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
6779 | struct die_reader_specs reader; |
6780 | struct cleanup *cleanups; | |
6781 | struct die_info *comp_unit_die; | |
6782 | int has_children; | |
6783 | ||
b4f54984 | 6784 | if (dwarf_die_debug) |
09406207 DE |
6785 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6786 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6787 | to_underlying (this_cu->sect_off)); |
09406207 | 6788 | |
dee91e82 DE |
6789 | gdb_assert (this_cu->cu == NULL); |
6790 | ||
33e80786 DE |
6791 | abbrev_section = (dwo_file != NULL |
6792 | ? &dwo_file->sections.abbrev | |
6793 | : get_abbrev_section_for_cu (this_cu)); | |
6794 | ||
dee91e82 DE |
6795 | /* This is cheap if the section is already read in. */ |
6796 | dwarf2_read_section (objfile, section); | |
6797 | ||
6798 | init_one_comp_unit (&cu, this_cu); | |
6799 | ||
6800 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
6801 | ||
9c541725 | 6802 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
6803 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
6804 | abbrev_section, info_ptr, | |
43988095 JK |
6805 | (this_cu->is_debug_types |
6806 | ? rcuh_kind::TYPE | |
6807 | : rcuh_kind::COMPILE)); | |
dee91e82 | 6808 | |
1ce1cefd | 6809 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
6810 | |
6811 | /* Skip dummy compilation units. */ | |
6812 | if (info_ptr >= begin_info_ptr + this_cu->length | |
6813 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 6814 | { |
dee91e82 | 6815 | do_cleanups (cleanups); |
21b2bd31 | 6816 | return; |
93311388 | 6817 | } |
72bf9492 | 6818 | |
dee91e82 DE |
6819 | dwarf2_read_abbrevs (&cu, abbrev_section); |
6820 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
6821 | ||
3019eac3 | 6822 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
6823 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
6824 | ||
6825 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6826 | ||
6827 | do_cleanups (cleanups); | |
6828 | } | |
6829 | ||
3019eac3 DE |
6830 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
6831 | does not lookup the specified DWO file. | |
6832 | This cannot be used to read DWO files. | |
dee91e82 DE |
6833 | |
6834 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6835 | This is done in order to not leave THIS_CU->cu in a state where we have |
6836 | to care whether it refers to the "main" CU or the DWO CU. | |
6837 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
6838 | |
6839 | static void | |
6840 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
6841 | die_reader_func_ftype *die_reader_func, | |
6842 | void *data) | |
6843 | { | |
33e80786 | 6844 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 6845 | } |
0018ea6f DE |
6846 | \f |
6847 | /* Type Unit Groups. | |
dee91e82 | 6848 | |
0018ea6f DE |
6849 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
6850 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
6851 | so that all types coming from the same compilation (.o file) are grouped | |
6852 | together. A future step could be to put the types in the same symtab as | |
6853 | the CU the types ultimately came from. */ | |
ff013f42 | 6854 | |
f4dc4d17 DE |
6855 | static hashval_t |
6856 | hash_type_unit_group (const void *item) | |
6857 | { | |
9a3c8263 SM |
6858 | const struct type_unit_group *tu_group |
6859 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6860 | |
094b34ac | 6861 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6862 | } |
348e048f DE |
6863 | |
6864 | static int | |
f4dc4d17 | 6865 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6866 | { |
9a3c8263 SM |
6867 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6868 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6869 | |
094b34ac | 6870 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6871 | } |
348e048f | 6872 | |
f4dc4d17 DE |
6873 | /* Allocate a hash table for type unit groups. */ |
6874 | ||
6875 | static htab_t | |
6876 | allocate_type_unit_groups_table (void) | |
6877 | { | |
6878 | return htab_create_alloc_ex (3, | |
6879 | hash_type_unit_group, | |
6880 | eq_type_unit_group, | |
6881 | NULL, | |
6882 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6883 | hashtab_obstack_allocate, | |
6884 | dummy_obstack_deallocate); | |
6885 | } | |
dee91e82 | 6886 | |
f4dc4d17 DE |
6887 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6888 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6889 | of any one psymtab grow too big. */ | |
6890 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6891 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6892 | |
094b34ac | 6893 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6894 | Create the type_unit_group object used to hold one or more TUs. */ |
6895 | ||
6896 | static struct type_unit_group * | |
094b34ac | 6897 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6898 | { |
6899 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6900 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6901 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6902 | |
6903 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6904 | struct type_unit_group); | |
094b34ac | 6905 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6906 | per_cu->objfile = objfile; |
f4dc4d17 | 6907 | |
094b34ac DE |
6908 | if (dwarf2_per_objfile->using_index) |
6909 | { | |
6910 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6911 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6912 | } |
6913 | else | |
6914 | { | |
9c541725 | 6915 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6916 | struct partial_symtab *pst; |
6917 | char *name; | |
6918 | ||
6919 | /* Give the symtab a useful name for debug purposes. */ | |
6920 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6921 | name = xstrprintf ("<type_units_%d>", | |
6922 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6923 | else | |
6924 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6925 | ||
6926 | pst = create_partial_symtab (per_cu, name); | |
6927 | pst->anonymous = 1; | |
f4dc4d17 | 6928 | |
094b34ac DE |
6929 | xfree (name); |
6930 | } | |
f4dc4d17 | 6931 | |
094b34ac | 6932 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6933 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6934 | |
6935 | return tu_group; | |
6936 | } | |
6937 | ||
094b34ac DE |
6938 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6939 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6940 | |
6941 | static struct type_unit_group * | |
ff39bb5e | 6942 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6943 | { |
6944 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6945 | struct type_unit_group *tu_group; | |
6946 | void **slot; | |
6947 | unsigned int line_offset; | |
6948 | struct type_unit_group type_unit_group_for_lookup; | |
6949 | ||
6950 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6951 | { | |
6952 | dwarf2_per_objfile->type_unit_groups = | |
6953 | allocate_type_unit_groups_table (); | |
6954 | } | |
6955 | ||
6956 | /* Do we need to create a new group, or can we use an existing one? */ | |
6957 | ||
6958 | if (stmt_list) | |
6959 | { | |
6960 | line_offset = DW_UNSND (stmt_list); | |
6961 | ++tu_stats->nr_symtab_sharers; | |
6962 | } | |
6963 | else | |
6964 | { | |
6965 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6966 | We can do various things here like create one group per TU or | |
6967 | spread them over multiple groups to split up the expansion work. | |
6968 | To avoid worst case scenarios (too many groups or too large groups) | |
6969 | we, umm, group them in bunches. */ | |
6970 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6971 | | (tu_stats->nr_stmt_less_type_units | |
6972 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6973 | ++tu_stats->nr_stmt_less_type_units; | |
6974 | } | |
6975 | ||
094b34ac | 6976 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6977 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6978 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6979 | &type_unit_group_for_lookup, INSERT); | |
6980 | if (*slot != NULL) | |
6981 | { | |
9a3c8263 | 6982 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6983 | gdb_assert (tu_group != NULL); |
6984 | } | |
6985 | else | |
6986 | { | |
9c541725 | 6987 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6988 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6989 | *slot = tu_group; |
6990 | ++tu_stats->nr_symtabs; | |
6991 | } | |
6992 | ||
6993 | return tu_group; | |
6994 | } | |
0018ea6f DE |
6995 | \f |
6996 | /* Partial symbol tables. */ | |
6997 | ||
6998 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6999 | ||
7000 | The caller must fill in the following details: | |
7001 | dirname, textlow, texthigh. */ | |
7002 | ||
7003 | static struct partial_symtab * | |
7004 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
7005 | { | |
7006 | struct objfile *objfile = per_cu->objfile; | |
7007 | struct partial_symtab *pst; | |
7008 | ||
18a94d75 | 7009 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
7010 | objfile->global_psymbols, |
7011 | objfile->static_psymbols); | |
0018ea6f DE |
7012 | |
7013 | pst->psymtabs_addrmap_supported = 1; | |
7014 | ||
7015 | /* This is the glue that links PST into GDB's symbol API. */ | |
7016 | pst->read_symtab_private = per_cu; | |
7017 | pst->read_symtab = dwarf2_read_symtab; | |
7018 | per_cu->v.psymtab = pst; | |
7019 | ||
7020 | return pst; | |
7021 | } | |
7022 | ||
b93601f3 TT |
7023 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
7024 | type. */ | |
7025 | ||
7026 | struct process_psymtab_comp_unit_data | |
7027 | { | |
7028 | /* True if we are reading a DW_TAG_partial_unit. */ | |
7029 | ||
7030 | int want_partial_unit; | |
7031 | ||
7032 | /* The "pretend" language that is used if the CU doesn't declare a | |
7033 | language. */ | |
7034 | ||
7035 | enum language pretend_language; | |
7036 | }; | |
7037 | ||
0018ea6f DE |
7038 | /* die_reader_func for process_psymtab_comp_unit. */ |
7039 | ||
7040 | static void | |
7041 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7042 | const gdb_byte *info_ptr, |
0018ea6f DE |
7043 | struct die_info *comp_unit_die, |
7044 | int has_children, | |
7045 | void *data) | |
7046 | { | |
7047 | struct dwarf2_cu *cu = reader->cu; | |
7048 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 7049 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7050 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7051 | CORE_ADDR baseaddr; |
7052 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
7053 | struct partial_symtab *pst; | |
3a2b436a | 7054 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7055 | const char *filename; |
9a3c8263 SM |
7056 | struct process_psymtab_comp_unit_data *info |
7057 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 7058 | |
b93601f3 | 7059 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
7060 | return; |
7061 | ||
7062 | gdb_assert (! per_cu->is_debug_types); | |
7063 | ||
b93601f3 | 7064 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
7065 | |
7066 | cu->list_in_scope = &file_symbols; | |
7067 | ||
7068 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
7069 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7070 | if (filename == NULL) | |
0018ea6f | 7071 | filename = ""; |
0018ea6f DE |
7072 | |
7073 | pst = create_partial_symtab (per_cu, filename); | |
7074 | ||
7075 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7076 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
7077 | |
7078 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7079 | ||
7080 | dwarf2_find_base_address (comp_unit_die, cu); | |
7081 | ||
7082 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7083 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7084 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7085 | &best_highpc, cu, pst); | |
7086 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
7087 | /* Store the contiguous range if it is not empty; it can be empty for |
7088 | CUs with no code. */ | |
7089 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
7090 | gdbarch_adjust_dwarf2_addr (gdbarch, |
7091 | best_lowpc + baseaddr), | |
7092 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
7093 | best_highpc + baseaddr) - 1, | |
7094 | pst); | |
0018ea6f DE |
7095 | |
7096 | /* Check if comp unit has_children. | |
7097 | If so, read the rest of the partial symbols from this comp unit. | |
7098 | If not, there's no more debug_info for this comp unit. */ | |
7099 | if (has_children) | |
7100 | { | |
7101 | struct partial_die_info *first_die; | |
7102 | CORE_ADDR lowpc, highpc; | |
7103 | ||
7104 | lowpc = ((CORE_ADDR) -1); | |
7105 | highpc = ((CORE_ADDR) 0); | |
7106 | ||
7107 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7108 | ||
7109 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7110 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7111 | |
7112 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7113 | complaints from `maint check'. */ | |
7114 | if (lowpc == ((CORE_ADDR) -1)) | |
7115 | lowpc = highpc; | |
7116 | ||
7117 | /* If the compilation unit didn't have an explicit address range, | |
7118 | then use the information extracted from its child dies. */ | |
e385593e | 7119 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7120 | { |
7121 | best_lowpc = lowpc; | |
7122 | best_highpc = highpc; | |
7123 | } | |
7124 | } | |
3e29f34a MR |
7125 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
7126 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 7127 | |
8763cede | 7128 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
7129 | |
7130 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
7131 | { | |
7132 | int i; | |
7133 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7134 | struct dwarf2_per_cu_data *iter; | |
7135 | ||
7136 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7137 | post-pass. */ | |
7138 | pst->number_of_dependencies = len; | |
8d749320 SM |
7139 | pst->dependencies = |
7140 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
7141 | for (i = 0; |
7142 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
7143 | i, iter); | |
7144 | ++i) | |
7145 | pst->dependencies[i] = iter->v.psymtab; | |
7146 | ||
7147 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
7148 | } | |
7149 | ||
7150 | /* Get the list of files included in the current compilation unit, | |
7151 | and build a psymtab for each of them. */ | |
7152 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7153 | ||
b4f54984 | 7154 | if (dwarf_read_debug) |
0018ea6f DE |
7155 | { |
7156 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
7157 | ||
7158 | fprintf_unfiltered (gdb_stdlog, | |
7159 | "Psymtab for %s unit @0x%x: %s - %s" | |
7160 | ", %d global, %d static syms\n", | |
7161 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 7162 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
7163 | paddress (gdbarch, pst->textlow), |
7164 | paddress (gdbarch, pst->texthigh), | |
7165 | pst->n_global_syms, pst->n_static_syms); | |
7166 | } | |
7167 | } | |
7168 | ||
7169 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7170 | Process compilation unit THIS_CU for a psymtab. */ | |
7171 | ||
7172 | static void | |
7173 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
7174 | int want_partial_unit, |
7175 | enum language pretend_language) | |
0018ea6f DE |
7176 | { |
7177 | /* If this compilation unit was already read in, free the | |
7178 | cached copy in order to read it in again. This is | |
7179 | necessary because we skipped some symbols when we first | |
7180 | read in the compilation unit (see load_partial_dies). | |
7181 | This problem could be avoided, but the benefit is unclear. */ | |
7182 | if (this_cu->cu != NULL) | |
7183 | free_one_cached_comp_unit (this_cu); | |
7184 | ||
f1902523 JK |
7185 | if (this_cu->is_debug_types) |
7186 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
7187 | NULL); | |
7188 | else | |
7189 | { | |
7190 | process_psymtab_comp_unit_data info; | |
7191 | info.want_partial_unit = want_partial_unit; | |
7192 | info.pretend_language = pretend_language; | |
7193 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
7194 | process_psymtab_comp_unit_reader, &info); | |
7195 | } | |
0018ea6f DE |
7196 | |
7197 | /* Age out any secondary CUs. */ | |
7198 | age_cached_comp_units (); | |
7199 | } | |
f4dc4d17 DE |
7200 | |
7201 | /* Reader function for build_type_psymtabs. */ | |
7202 | ||
7203 | static void | |
7204 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7205 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
7206 | struct die_info *type_unit_die, |
7207 | int has_children, | |
7208 | void *data) | |
7209 | { | |
7210 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7211 | struct dwarf2_cu *cu = reader->cu; | |
7212 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7213 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7214 | struct type_unit_group *tu_group; |
7215 | struct attribute *attr; | |
7216 | struct partial_die_info *first_die; | |
7217 | CORE_ADDR lowpc, highpc; | |
7218 | struct partial_symtab *pst; | |
7219 | ||
7220 | gdb_assert (data == NULL); | |
0186c6a7 DE |
7221 | gdb_assert (per_cu->is_debug_types); |
7222 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7223 | |
7224 | if (! has_children) | |
7225 | return; | |
7226 | ||
7227 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 7228 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7229 | |
0186c6a7 | 7230 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
7231 | |
7232 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
7233 | cu->list_in_scope = &file_symbols; | |
7234 | pst = create_partial_symtab (per_cu, ""); | |
7235 | pst->anonymous = 1; | |
7236 | ||
7237 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7238 | ||
7239 | lowpc = (CORE_ADDR) -1; | |
7240 | highpc = (CORE_ADDR) 0; | |
7241 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7242 | ||
8763cede | 7243 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
7244 | } |
7245 | ||
73051182 DE |
7246 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7247 | ||
7248 | struct tu_abbrev_offset | |
7249 | { | |
7250 | struct signatured_type *sig_type; | |
7251 | sect_offset abbrev_offset; | |
7252 | }; | |
7253 | ||
7254 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
7255 | ||
7256 | static int | |
7257 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
7258 | { | |
9a3c8263 SM |
7259 | const struct tu_abbrev_offset * const *a |
7260 | = (const struct tu_abbrev_offset * const*) ap; | |
7261 | const struct tu_abbrev_offset * const *b | |
7262 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
7263 | sect_offset aoff = (*a)->abbrev_offset; |
7264 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
7265 | |
7266 | return (aoff > boff) - (aoff < boff); | |
7267 | } | |
7268 | ||
7269 | /* Efficiently read all the type units. | |
7270 | This does the bulk of the work for build_type_psymtabs. | |
7271 | ||
7272 | The efficiency is because we sort TUs by the abbrev table they use and | |
7273 | only read each abbrev table once. In one program there are 200K TUs | |
7274 | sharing 8K abbrev tables. | |
7275 | ||
7276 | The main purpose of this function is to support building the | |
7277 | dwarf2_per_objfile->type_unit_groups table. | |
7278 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7279 | can collapse the search space by grouping them by stmt_list. | |
7280 | The savings can be significant, in the same program from above the 200K TUs | |
7281 | share 8K stmt_list tables. | |
7282 | ||
7283 | FUNC is expected to call get_type_unit_group, which will create the | |
7284 | struct type_unit_group if necessary and add it to | |
7285 | dwarf2_per_objfile->type_unit_groups. */ | |
7286 | ||
7287 | static void | |
7288 | build_type_psymtabs_1 (void) | |
7289 | { | |
73051182 DE |
7290 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7291 | struct cleanup *cleanups; | |
7292 | struct abbrev_table *abbrev_table; | |
7293 | sect_offset abbrev_offset; | |
7294 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
7295 | int i; |
7296 | ||
7297 | /* It's up to the caller to not call us multiple times. */ | |
7298 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7299 | ||
7300 | if (dwarf2_per_objfile->n_type_units == 0) | |
7301 | return; | |
7302 | ||
7303 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7304 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7305 | read each abbrev table in. | |
7306 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7307 | This is simpler and efficient enough for now. | |
7308 | ||
7309 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7310 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7311 | stmt_list value too so in practice this should work well. | |
7312 | ||
7313 | The basic algorithm here is: | |
7314 | ||
7315 | sort TUs by abbrev table | |
7316 | for each TU with same abbrev table: | |
7317 | read abbrev table if first user | |
7318 | read TU top level DIE | |
7319 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7320 | call FUNC */ | |
7321 | ||
b4f54984 | 7322 | if (dwarf_read_debug) |
73051182 DE |
7323 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7324 | ||
7325 | /* Sort in a separate table to maintain the order of all_type_units | |
7326 | for .gdb_index: TU indices directly index all_type_units. */ | |
7327 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
7328 | dwarf2_per_objfile->n_type_units); | |
7329 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7330 | { | |
7331 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
7332 | ||
7333 | sorted_by_abbrev[i].sig_type = sig_type; | |
7334 | sorted_by_abbrev[i].abbrev_offset = | |
7335 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 7336 | sig_type->per_cu.sect_off); |
73051182 DE |
7337 | } |
7338 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
7339 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
7340 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
7341 | ||
9c541725 | 7342 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
7343 | abbrev_table = NULL; |
7344 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
7345 | ||
7346 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7347 | { | |
7348 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
7349 | ||
7350 | /* Switch to the next abbrev table if necessary. */ | |
7351 | if (abbrev_table == NULL | |
9c541725 | 7352 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
7353 | { |
7354 | if (abbrev_table != NULL) | |
7355 | { | |
7356 | abbrev_table_free (abbrev_table); | |
7357 | /* Reset to NULL in case abbrev_table_read_table throws | |
7358 | an error: abbrev_table_free_cleanup will get called. */ | |
7359 | abbrev_table = NULL; | |
7360 | } | |
7361 | abbrev_offset = tu->abbrev_offset; | |
7362 | abbrev_table = | |
7363 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
7364 | abbrev_offset); | |
7365 | ++tu_stats->nr_uniq_abbrev_tables; | |
7366 | } | |
7367 | ||
7368 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
7369 | build_type_psymtabs_reader, NULL); | |
7370 | } | |
7371 | ||
73051182 | 7372 | do_cleanups (cleanups); |
6aa5f3a6 | 7373 | } |
73051182 | 7374 | |
6aa5f3a6 DE |
7375 | /* Print collected type unit statistics. */ |
7376 | ||
7377 | static void | |
7378 | print_tu_stats (void) | |
7379 | { | |
7380 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7381 | ||
7382 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
7383 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
7384 | dwarf2_per_objfile->n_type_units); | |
7385 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
7386 | tu_stats->nr_uniq_abbrev_tables); | |
7387 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7388 | tu_stats->nr_symtabs); | |
7389 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7390 | tu_stats->nr_symtab_sharers); | |
7391 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7392 | tu_stats->nr_stmt_less_type_units); | |
7393 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7394 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7395 | } |
7396 | ||
f4dc4d17 DE |
7397 | /* Traversal function for build_type_psymtabs. */ |
7398 | ||
7399 | static int | |
7400 | build_type_psymtab_dependencies (void **slot, void *info) | |
7401 | { | |
7402 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7403 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7404 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 7405 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
7406 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
7407 | struct signatured_type *iter; | |
f4dc4d17 DE |
7408 | int i; |
7409 | ||
7410 | gdb_assert (len > 0); | |
0186c6a7 | 7411 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
7412 | |
7413 | pst->number_of_dependencies = len; | |
8d749320 SM |
7414 | pst->dependencies = |
7415 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 7416 | for (i = 0; |
0186c6a7 | 7417 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
7418 | ++i) |
7419 | { | |
0186c6a7 DE |
7420 | gdb_assert (iter->per_cu.is_debug_types); |
7421 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7422 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7423 | } |
7424 | ||
0186c6a7 | 7425 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
7426 | |
7427 | return 1; | |
7428 | } | |
7429 | ||
7430 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7431 | Build partial symbol tables for the .debug_types comp-units. */ | |
7432 | ||
7433 | static void | |
7434 | build_type_psymtabs (struct objfile *objfile) | |
7435 | { | |
0e50663e | 7436 | if (! create_all_type_units (objfile)) |
348e048f DE |
7437 | return; |
7438 | ||
73051182 | 7439 | build_type_psymtabs_1 (); |
6aa5f3a6 | 7440 | } |
f4dc4d17 | 7441 | |
6aa5f3a6 DE |
7442 | /* Traversal function for process_skeletonless_type_unit. |
7443 | Read a TU in a DWO file and build partial symbols for it. */ | |
7444 | ||
7445 | static int | |
7446 | process_skeletonless_type_unit (void **slot, void *info) | |
7447 | { | |
7448 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 7449 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
7450 | struct signatured_type find_entry, *entry; |
7451 | ||
7452 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7453 | ||
7454 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7455 | { | |
7456 | dwarf2_per_objfile->signatured_types | |
7457 | = allocate_signatured_type_table (objfile); | |
7458 | } | |
7459 | ||
7460 | find_entry.signature = dwo_unit->signature; | |
7461 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
7462 | INSERT); | |
7463 | /* If we've already seen this type there's nothing to do. What's happening | |
7464 | is we're doing our own version of comdat-folding here. */ | |
7465 | if (*slot != NULL) | |
7466 | return 1; | |
7467 | ||
7468 | /* This does the job that create_all_type_units would have done for | |
7469 | this TU. */ | |
7470 | entry = add_type_unit (dwo_unit->signature, slot); | |
7471 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
7472 | *slot = entry; | |
7473 | ||
7474 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
7475 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
7476 | build_type_psymtabs_reader, NULL); | |
7477 | ||
7478 | return 1; | |
7479 | } | |
7480 | ||
7481 | /* Traversal function for process_skeletonless_type_units. */ | |
7482 | ||
7483 | static int | |
7484 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7485 | { | |
7486 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7487 | ||
7488 | if (dwo_file->tus != NULL) | |
7489 | { | |
7490 | htab_traverse_noresize (dwo_file->tus, | |
7491 | process_skeletonless_type_unit, info); | |
7492 | } | |
7493 | ||
7494 | return 1; | |
7495 | } | |
7496 | ||
7497 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7498 | This is needed in case a TU was emitted without its skeleton. | |
7499 | Note: This can't be done until we know what all the DWO files are. */ | |
7500 | ||
7501 | static void | |
7502 | process_skeletonless_type_units (struct objfile *objfile) | |
7503 | { | |
7504 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
7505 | if (get_dwp_file () == NULL | |
7506 | && dwarf2_per_objfile->dwo_files != NULL) | |
7507 | { | |
7508 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
7509 | process_dwo_file_for_skeletonless_type_units, | |
7510 | objfile); | |
7511 | } | |
348e048f DE |
7512 | } |
7513 | ||
95554aad TT |
7514 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
7515 | ||
7516 | static void | |
7517 | set_partial_user (struct objfile *objfile) | |
7518 | { | |
7519 | int i; | |
7520 | ||
7521 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
7522 | { | |
8832e7e3 | 7523 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
7524 | struct partial_symtab *pst = per_cu->v.psymtab; |
7525 | int j; | |
7526 | ||
36586728 TT |
7527 | if (pst == NULL) |
7528 | continue; | |
7529 | ||
95554aad TT |
7530 | for (j = 0; j < pst->number_of_dependencies; ++j) |
7531 | { | |
7532 | /* Set the 'user' field only if it is not already set. */ | |
7533 | if (pst->dependencies[j]->user == NULL) | |
7534 | pst->dependencies[j]->user = pst; | |
7535 | } | |
7536 | } | |
7537 | } | |
7538 | ||
93311388 DE |
7539 | /* Build the partial symbol table by doing a quick pass through the |
7540 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7541 | |
93311388 | 7542 | static void |
c67a9c90 | 7543 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 7544 | { |
791afaa2 | 7545 | struct cleanup *back_to; |
21b2bd31 | 7546 | int i; |
93311388 | 7547 | |
b4f54984 | 7548 | if (dwarf_read_debug) |
45cfd468 DE |
7549 | { |
7550 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7551 | objfile_name (objfile)); |
45cfd468 DE |
7552 | } |
7553 | ||
98bfdba5 PA |
7554 | dwarf2_per_objfile->reading_partial_symbols = 1; |
7555 | ||
be391dca | 7556 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 7557 | |
93311388 DE |
7558 | /* Any cached compilation units will be linked by the per-objfile |
7559 | read_in_chain. Make sure to free them when we're done. */ | |
7560 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 7561 | |
348e048f DE |
7562 | build_type_psymtabs (objfile); |
7563 | ||
93311388 | 7564 | create_all_comp_units (objfile); |
c906108c | 7565 | |
60606b2c TT |
7566 | /* Create a temporary address map on a temporary obstack. We later |
7567 | copy this to the final obstack. */ | |
8268c778 | 7568 | auto_obstack temp_obstack; |
791afaa2 TT |
7569 | |
7570 | scoped_restore save_psymtabs_addrmap | |
7571 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
7572 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 7573 | |
21b2bd31 | 7574 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 7575 | { |
8832e7e3 | 7576 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 7577 | |
b93601f3 | 7578 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 7579 | } |
ff013f42 | 7580 | |
6aa5f3a6 DE |
7581 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
7582 | process_skeletonless_type_units (objfile); | |
7583 | ||
7584 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7585 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7586 | { | |
7587 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
7588 | build_type_psymtab_dependencies, NULL); | |
7589 | } | |
7590 | ||
b4f54984 | 7591 | if (dwarf_read_debug) |
6aa5f3a6 DE |
7592 | print_tu_stats (); |
7593 | ||
95554aad TT |
7594 | set_partial_user (objfile); |
7595 | ||
ff013f42 JK |
7596 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
7597 | &objfile->objfile_obstack); | |
791afaa2 TT |
7598 | /* At this point we want to keep the address map. */ |
7599 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7600 | |
ae038cb0 | 7601 | do_cleanups (back_to); |
45cfd468 | 7602 | |
b4f54984 | 7603 | if (dwarf_read_debug) |
45cfd468 | 7604 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7605 | objfile_name (objfile)); |
ae038cb0 DJ |
7606 | } |
7607 | ||
3019eac3 | 7608 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
7609 | |
7610 | static void | |
dee91e82 | 7611 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 7612 | const gdb_byte *info_ptr, |
dee91e82 DE |
7613 | struct die_info *comp_unit_die, |
7614 | int has_children, | |
7615 | void *data) | |
ae038cb0 | 7616 | { |
dee91e82 | 7617 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 7618 | |
95554aad | 7619 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 7620 | |
ae038cb0 DJ |
7621 | /* Check if comp unit has_children. |
7622 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 7623 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 7624 | if (has_children) |
dee91e82 DE |
7625 | load_partial_dies (reader, info_ptr, 0); |
7626 | } | |
98bfdba5 | 7627 | |
dee91e82 DE |
7628 | /* Load the partial DIEs for a secondary CU into memory. |
7629 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7630 | |
dee91e82 DE |
7631 | static void |
7632 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7633 | { | |
f4dc4d17 DE |
7634 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7635 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
7636 | } |
7637 | ||
ae038cb0 | 7638 | static void |
36586728 TT |
7639 | read_comp_units_from_section (struct objfile *objfile, |
7640 | struct dwarf2_section_info *section, | |
f1902523 | 7641 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
7642 | unsigned int is_dwz, |
7643 | int *n_allocated, | |
7644 | int *n_comp_units, | |
7645 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 7646 | { |
d521ce57 | 7647 | const gdb_byte *info_ptr; |
be391dca | 7648 | |
b4f54984 | 7649 | if (dwarf_read_debug) |
bf6af496 | 7650 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
7651 | get_section_name (section), |
7652 | get_section_file_name (section)); | |
bf6af496 | 7653 | |
36586728 | 7654 | dwarf2_read_section (objfile, section); |
ae038cb0 | 7655 | |
36586728 | 7656 | info_ptr = section->buffer; |
6e70227d | 7657 | |
36586728 | 7658 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7659 | { |
ae038cb0 | 7660 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7661 | |
9c541725 | 7662 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7663 | |
f1902523 JK |
7664 | comp_unit_head cu_header; |
7665 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
7666 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7667 | |
7668 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7669 | if (cu_header.unit_type != DW_UT_type) |
7670 | { | |
7671 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7672 | struct dwarf2_per_cu_data); | |
7673 | memset (this_cu, 0, sizeof (*this_cu)); | |
7674 | } | |
7675 | else | |
7676 | { | |
7677 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7678 | struct signatured_type); | |
7679 | memset (sig_type, 0, sizeof (*sig_type)); | |
7680 | sig_type->signature = cu_header.signature; | |
7681 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7682 | this_cu = &sig_type->per_cu; | |
7683 | } | |
7684 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7685 | this_cu->sect_off = sect_off; |
f1902523 | 7686 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7687 | this_cu->is_dwz = is_dwz; |
9291a0cd | 7688 | this_cu->objfile = objfile; |
8a0459fd | 7689 | this_cu->section = section; |
ae038cb0 | 7690 | |
36586728 | 7691 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 7692 | { |
36586728 | 7693 | *n_allocated *= 2; |
224c3ddb SM |
7694 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
7695 | *all_comp_units, *n_allocated); | |
ae038cb0 | 7696 | } |
36586728 TT |
7697 | (*all_comp_units)[*n_comp_units] = this_cu; |
7698 | ++*n_comp_units; | |
ae038cb0 DJ |
7699 | |
7700 | info_ptr = info_ptr + this_cu->length; | |
7701 | } | |
36586728 TT |
7702 | } |
7703 | ||
7704 | /* Create a list of all compilation units in OBJFILE. | |
7705 | This is only done for -readnow and building partial symtabs. */ | |
7706 | ||
7707 | static void | |
7708 | create_all_comp_units (struct objfile *objfile) | |
7709 | { | |
7710 | int n_allocated; | |
7711 | int n_comp_units; | |
7712 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 7713 | struct dwz_file *dwz; |
36586728 TT |
7714 | |
7715 | n_comp_units = 0; | |
7716 | n_allocated = 10; | |
8d749320 | 7717 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 7718 | |
f1902523 JK |
7719 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
7720 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
7721 | &n_allocated, &n_comp_units, &all_comp_units); |
7722 | ||
4db1a1dc TT |
7723 | dwz = dwarf2_get_dwz_file (); |
7724 | if (dwz != NULL) | |
f1902523 | 7725 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
7726 | &n_allocated, &n_comp_units, |
7727 | &all_comp_units); | |
ae038cb0 | 7728 | |
8d749320 SM |
7729 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
7730 | struct dwarf2_per_cu_data *, | |
7731 | n_comp_units); | |
ae038cb0 DJ |
7732 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
7733 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
7734 | xfree (all_comp_units); | |
7735 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
7736 | } |
7737 | ||
5734ee8b | 7738 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7739 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7740 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7741 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7742 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7743 | |
72bf9492 DJ |
7744 | static void |
7745 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7746 | CORE_ADDR *highpc, int set_addrmap, |
7747 | struct dwarf2_cu *cu) | |
c906108c | 7748 | { |
72bf9492 | 7749 | struct partial_die_info *pdi; |
c906108c | 7750 | |
91c24f0a DC |
7751 | /* Now, march along the PDI's, descending into ones which have |
7752 | interesting children but skipping the children of the other ones, | |
7753 | until we reach the end of the compilation unit. */ | |
c906108c | 7754 | |
72bf9492 | 7755 | pdi = first_die; |
91c24f0a | 7756 | |
72bf9492 DJ |
7757 | while (pdi != NULL) |
7758 | { | |
7759 | fixup_partial_die (pdi, cu); | |
c906108c | 7760 | |
f55ee35c | 7761 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7762 | children, so we need to look at them. Ditto for anonymous |
7763 | enums. */ | |
933c6fe4 | 7764 | |
72bf9492 | 7765 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
7766 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
7767 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 7768 | { |
72bf9492 | 7769 | switch (pdi->tag) |
c906108c SS |
7770 | { |
7771 | case DW_TAG_subprogram: | |
cdc07690 | 7772 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7773 | break; |
72929c62 | 7774 | case DW_TAG_constant: |
c906108c SS |
7775 | case DW_TAG_variable: |
7776 | case DW_TAG_typedef: | |
91c24f0a | 7777 | case DW_TAG_union_type: |
72bf9492 | 7778 | if (!pdi->is_declaration) |
63d06c5c | 7779 | { |
72bf9492 | 7780 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7781 | } |
7782 | break; | |
c906108c | 7783 | case DW_TAG_class_type: |
680b30c7 | 7784 | case DW_TAG_interface_type: |
c906108c | 7785 | case DW_TAG_structure_type: |
72bf9492 | 7786 | if (!pdi->is_declaration) |
c906108c | 7787 | { |
72bf9492 | 7788 | add_partial_symbol (pdi, cu); |
c906108c | 7789 | } |
e98c9e7c TT |
7790 | if (cu->language == language_rust && pdi->has_children) |
7791 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
7792 | set_addrmap, cu); | |
c906108c | 7793 | break; |
91c24f0a | 7794 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7795 | if (!pdi->is_declaration) |
7796 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7797 | break; |
7798 | case DW_TAG_base_type: | |
a02abb62 | 7799 | case DW_TAG_subrange_type: |
c906108c | 7800 | /* File scope base type definitions are added to the partial |
c5aa993b | 7801 | symbol table. */ |
72bf9492 | 7802 | add_partial_symbol (pdi, cu); |
c906108c | 7803 | break; |
d9fa45fe | 7804 | case DW_TAG_namespace: |
cdc07690 | 7805 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7806 | break; |
5d7cb8df | 7807 | case DW_TAG_module: |
cdc07690 | 7808 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 7809 | break; |
95554aad TT |
7810 | case DW_TAG_imported_unit: |
7811 | { | |
7812 | struct dwarf2_per_cu_data *per_cu; | |
7813 | ||
f4dc4d17 DE |
7814 | /* For now we don't handle imported units in type units. */ |
7815 | if (cu->per_cu->is_debug_types) | |
7816 | { | |
7817 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7818 | " supported in type units [in module %s]"), | |
4262abfb | 7819 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
7820 | } |
7821 | ||
9c541725 | 7822 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 7823 | pdi->is_dwz, |
95554aad TT |
7824 | cu->objfile); |
7825 | ||
7826 | /* Go read the partial unit, if needed. */ | |
7827 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 7828 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 7829 | |
f4dc4d17 | 7830 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 7831 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
7832 | } |
7833 | break; | |
74921315 KS |
7834 | case DW_TAG_imported_declaration: |
7835 | add_partial_symbol (pdi, cu); | |
7836 | break; | |
c906108c SS |
7837 | default: |
7838 | break; | |
7839 | } | |
7840 | } | |
7841 | ||
72bf9492 DJ |
7842 | /* If the die has a sibling, skip to the sibling. */ |
7843 | ||
7844 | pdi = pdi->die_sibling; | |
7845 | } | |
7846 | } | |
7847 | ||
7848 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7849 | |
72bf9492 | 7850 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7851 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7852 | Enumerators are an exception; they use the scope of their parent |
7853 | enumeration type, i.e. the name of the enumeration type is not | |
7854 | prepended to the enumerator. | |
91c24f0a | 7855 | |
72bf9492 DJ |
7856 | There are two complexities. One is DW_AT_specification; in this |
7857 | case "parent" means the parent of the target of the specification, | |
7858 | instead of the direct parent of the DIE. The other is compilers | |
7859 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7860 | the fully qualified name of structure types from their members' | |
7861 | linkage names. This must be done using the DIE's children rather | |
7862 | than the children of any DW_AT_specification target. We only need | |
7863 | to do this for structures at the top level, i.e. if the target of | |
7864 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7865 | have a parent. */ | |
7866 | ||
7867 | /* Compute the scope prefix associated with PDI's parent, in | |
7868 | compilation unit CU. The result will be allocated on CU's | |
7869 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7870 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7871 | static const char * |
72bf9492 DJ |
7872 | partial_die_parent_scope (struct partial_die_info *pdi, |
7873 | struct dwarf2_cu *cu) | |
7874 | { | |
15d034d0 | 7875 | const char *grandparent_scope; |
72bf9492 | 7876 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7877 | |
72bf9492 DJ |
7878 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7879 | then this means the parent of the specification DIE. */ | |
7880 | ||
7881 | real_pdi = pdi; | |
72bf9492 | 7882 | while (real_pdi->has_specification) |
36586728 TT |
7883 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7884 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7885 | |
7886 | parent = real_pdi->die_parent; | |
7887 | if (parent == NULL) | |
7888 | return NULL; | |
7889 | ||
7890 | if (parent->scope_set) | |
7891 | return parent->scope; | |
7892 | ||
7893 | fixup_partial_die (parent, cu); | |
7894 | ||
10b3939b | 7895 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7896 | |
acebe513 UW |
7897 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7898 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7899 | Work around this problem here. */ | |
7900 | if (cu->language == language_cplus | |
6e70227d | 7901 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7902 | && strcmp (parent->name, "::") == 0 |
7903 | && grandparent_scope == NULL) | |
7904 | { | |
7905 | parent->scope = NULL; | |
7906 | parent->scope_set = 1; | |
7907 | return NULL; | |
7908 | } | |
7909 | ||
9c6c53f7 SA |
7910 | if (pdi->tag == DW_TAG_enumerator) |
7911 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7912 | parent->scope = grandparent_scope; | |
7913 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7914 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7915 | || parent->tag == DW_TAG_structure_type |
7916 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7917 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7918 | || parent->tag == DW_TAG_union_type |
7919 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7920 | { |
7921 | if (grandparent_scope == NULL) | |
7922 | parent->scope = parent->name; | |
7923 | else | |
3e43a32a MS |
7924 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7925 | grandparent_scope, | |
f55ee35c | 7926 | parent->name, 0, cu); |
72bf9492 | 7927 | } |
72bf9492 DJ |
7928 | else |
7929 | { | |
7930 | /* FIXME drow/2004-04-01: What should we be doing with | |
7931 | function-local names? For partial symbols, we should probably be | |
7932 | ignoring them. */ | |
7933 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7934 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7935 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7936 | parent->scope = grandparent_scope; |
c906108c SS |
7937 | } |
7938 | ||
72bf9492 DJ |
7939 | parent->scope_set = 1; |
7940 | return parent->scope; | |
7941 | } | |
7942 | ||
7943 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7944 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7945 | |
72bf9492 DJ |
7946 | static char * |
7947 | partial_die_full_name (struct partial_die_info *pdi, | |
7948 | struct dwarf2_cu *cu) | |
7949 | { | |
15d034d0 | 7950 | const char *parent_scope; |
72bf9492 | 7951 | |
98bfdba5 PA |
7952 | /* If this is a template instantiation, we can not work out the |
7953 | template arguments from partial DIEs. So, unfortunately, we have | |
7954 | to go through the full DIEs. At least any work we do building | |
7955 | types here will be reused if full symbols are loaded later. */ | |
7956 | if (pdi->has_template_arguments) | |
7957 | { | |
7958 | fixup_partial_die (pdi, cu); | |
7959 | ||
7960 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7961 | { | |
7962 | struct die_info *die; | |
7963 | struct attribute attr; | |
7964 | struct dwarf2_cu *ref_cu = cu; | |
7965 | ||
b64f50a1 | 7966 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7967 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7968 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7969 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7970 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7971 | ||
7972 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7973 | } | |
7974 | } | |
7975 | ||
72bf9492 DJ |
7976 | parent_scope = partial_die_parent_scope (pdi, cu); |
7977 | if (parent_scope == NULL) | |
7978 | return NULL; | |
7979 | else | |
f55ee35c | 7980 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7981 | } |
7982 | ||
7983 | static void | |
72bf9492 | 7984 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7985 | { |
e7c27a73 | 7986 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7987 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7988 | CORE_ADDR addr = 0; |
15d034d0 | 7989 | const char *actual_name = NULL; |
e142c38c | 7990 | CORE_ADDR baseaddr; |
15d034d0 | 7991 | char *built_actual_name; |
e142c38c DJ |
7992 | |
7993 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7994 | |
15d034d0 TT |
7995 | built_actual_name = partial_die_full_name (pdi, cu); |
7996 | if (built_actual_name != NULL) | |
7997 | actual_name = built_actual_name; | |
63d06c5c | 7998 | |
72bf9492 DJ |
7999 | if (actual_name == NULL) |
8000 | actual_name = pdi->name; | |
8001 | ||
c906108c SS |
8002 | switch (pdi->tag) |
8003 | { | |
8004 | case DW_TAG_subprogram: | |
3e29f34a | 8005 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 8006 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 8007 | { |
2cfa0c8d JB |
8008 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
8009 | of the global scope. But in Ada, we want to be able to access | |
8010 | nested procedures globally. So all Ada subprograms are stored | |
8011 | in the global scope. */ | |
f47fb265 | 8012 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8013 | built_actual_name != NULL, |
f47fb265 MS |
8014 | VAR_DOMAIN, LOC_BLOCK, |
8015 | &objfile->global_psymbols, | |
1762568f | 8016 | addr, cu->language, objfile); |
c906108c SS |
8017 | } |
8018 | else | |
8019 | { | |
f47fb265 | 8020 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8021 | built_actual_name != NULL, |
f47fb265 MS |
8022 | VAR_DOMAIN, LOC_BLOCK, |
8023 | &objfile->static_psymbols, | |
1762568f | 8024 | addr, cu->language, objfile); |
c906108c | 8025 | } |
0c1b455e TT |
8026 | |
8027 | if (pdi->main_subprogram && actual_name != NULL) | |
8028 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8029 | break; |
72929c62 JB |
8030 | case DW_TAG_constant: |
8031 | { | |
af5bf4ad | 8032 | std::vector<partial_symbol *> *list; |
72929c62 JB |
8033 | |
8034 | if (pdi->is_external) | |
8035 | list = &objfile->global_psymbols; | |
8036 | else | |
8037 | list = &objfile->static_psymbols; | |
f47fb265 | 8038 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8039 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 8040 | list, 0, cu->language, objfile); |
72929c62 JB |
8041 | } |
8042 | break; | |
c906108c | 8043 | case DW_TAG_variable: |
95554aad TT |
8044 | if (pdi->d.locdesc) |
8045 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8046 | |
95554aad | 8047 | if (pdi->d.locdesc |
caac4577 JG |
8048 | && addr == 0 |
8049 | && !dwarf2_per_objfile->has_section_at_zero) | |
8050 | { | |
8051 | /* A global or static variable may also have been stripped | |
8052 | out by the linker if unused, in which case its address | |
8053 | will be nullified; do not add such variables into partial | |
8054 | symbol table then. */ | |
8055 | } | |
8056 | else if (pdi->is_external) | |
c906108c SS |
8057 | { |
8058 | /* Global Variable. | |
8059 | Don't enter into the minimal symbol tables as there is | |
8060 | a minimal symbol table entry from the ELF symbols already. | |
8061 | Enter into partial symbol table if it has a location | |
8062 | descriptor or a type. | |
8063 | If the location descriptor is missing, new_symbol will create | |
8064 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8065 | be determined from the minimal symbol table whenever the variable | |
8066 | is referenced. | |
8067 | The address for the partial symbol table entry is not | |
8068 | used by GDB, but it comes in handy for debugging partial symbol | |
8069 | table building. */ | |
8070 | ||
95554aad | 8071 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 8072 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8073 | built_actual_name != NULL, |
f47fb265 MS |
8074 | VAR_DOMAIN, LOC_STATIC, |
8075 | &objfile->global_psymbols, | |
1762568f | 8076 | addr + baseaddr, |
f47fb265 | 8077 | cu->language, objfile); |
c906108c SS |
8078 | } |
8079 | else | |
8080 | { | |
ff908ebf AW |
8081 | int has_loc = pdi->d.locdesc != NULL; |
8082 | ||
8083 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8084 | without location descriptors or constant values). */ | |
8085 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 8086 | { |
15d034d0 | 8087 | xfree (built_actual_name); |
decbce07 MS |
8088 | return; |
8089 | } | |
ff908ebf | 8090 | |
f47fb265 | 8091 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8092 | built_actual_name != NULL, |
f47fb265 MS |
8093 | VAR_DOMAIN, LOC_STATIC, |
8094 | &objfile->static_psymbols, | |
ff908ebf | 8095 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 8096 | cu->language, objfile); |
c906108c SS |
8097 | } |
8098 | break; | |
8099 | case DW_TAG_typedef: | |
8100 | case DW_TAG_base_type: | |
a02abb62 | 8101 | case DW_TAG_subrange_type: |
38d518c9 | 8102 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8103 | built_actual_name != NULL, |
176620f1 | 8104 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 8105 | &objfile->static_psymbols, |
1762568f | 8106 | 0, cu->language, objfile); |
c906108c | 8107 | break; |
74921315 | 8108 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
8109 | case DW_TAG_namespace: |
8110 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 8111 | built_actual_name != NULL, |
72bf9492 DJ |
8112 | VAR_DOMAIN, LOC_TYPEDEF, |
8113 | &objfile->global_psymbols, | |
1762568f | 8114 | 0, cu->language, objfile); |
72bf9492 | 8115 | break; |
530e8392 KB |
8116 | case DW_TAG_module: |
8117 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
8118 | built_actual_name != NULL, | |
8119 | MODULE_DOMAIN, LOC_TYPEDEF, | |
8120 | &objfile->global_psymbols, | |
1762568f | 8121 | 0, cu->language, objfile); |
530e8392 | 8122 | break; |
c906108c | 8123 | case DW_TAG_class_type: |
680b30c7 | 8124 | case DW_TAG_interface_type: |
c906108c SS |
8125 | case DW_TAG_structure_type: |
8126 | case DW_TAG_union_type: | |
8127 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8128 | /* Skip external references. The DWARF standard says in the section |
8129 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8130 | structure, union or class type is represented by a structure, | |
8131 | union or class entry that does not have a byte size attribute | |
8132 | and that has a DW_AT_declaration attribute." */ | |
8133 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 8134 | { |
15d034d0 | 8135 | xfree (built_actual_name); |
decbce07 MS |
8136 | return; |
8137 | } | |
fa4028e9 | 8138 | |
63d06c5c DC |
8139 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8140 | static vs. global. */ | |
38d518c9 | 8141 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8142 | built_actual_name != NULL, |
176620f1 | 8143 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 8144 | cu->language == language_cplus |
63d06c5c DC |
8145 | ? &objfile->global_psymbols |
8146 | : &objfile->static_psymbols, | |
1762568f | 8147 | 0, cu->language, objfile); |
c906108c | 8148 | |
c906108c SS |
8149 | break; |
8150 | case DW_TAG_enumerator: | |
38d518c9 | 8151 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8152 | built_actual_name != NULL, |
176620f1 | 8153 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 8154 | cu->language == language_cplus |
f6fe98ef DJ |
8155 | ? &objfile->global_psymbols |
8156 | : &objfile->static_psymbols, | |
1762568f | 8157 | 0, cu->language, objfile); |
c906108c SS |
8158 | break; |
8159 | default: | |
8160 | break; | |
8161 | } | |
5c4e30ca | 8162 | |
15d034d0 | 8163 | xfree (built_actual_name); |
c906108c SS |
8164 | } |
8165 | ||
5c4e30ca DC |
8166 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8167 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8168 | the name of the enclosing namespace. */ | |
91c24f0a | 8169 | |
72bf9492 DJ |
8170 | static void |
8171 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8172 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8173 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8174 | { |
72bf9492 | 8175 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8176 | |
72bf9492 | 8177 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8178 | |
8179 | /* Now scan partial symbols in that namespace. */ | |
8180 | ||
91c24f0a | 8181 | if (pdi->has_children) |
cdc07690 | 8182 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8183 | } |
8184 | ||
5d7cb8df JK |
8185 | /* Read a partial die corresponding to a Fortran module. */ |
8186 | ||
8187 | static void | |
8188 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8189 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8190 | { |
530e8392 KB |
8191 | /* Add a symbol for the namespace. */ |
8192 | ||
8193 | add_partial_symbol (pdi, cu); | |
8194 | ||
f55ee35c | 8195 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8196 | |
8197 | if (pdi->has_children) | |
cdc07690 | 8198 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8199 | } |
8200 | ||
bc30ff58 JB |
8201 | /* Read a partial die corresponding to a subprogram and create a partial |
8202 | symbol for that subprogram. When the CU language allows it, this | |
8203 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 8204 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
8205 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
8206 | and highest PC values found in PDI. | |
6e70227d | 8207 | |
cdc07690 YQ |
8208 | PDI may also be a lexical block, in which case we simply search |
8209 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8210 | Again, this is only performed when the CU language allows this |
8211 | type of definitions. */ | |
8212 | ||
8213 | static void | |
8214 | add_partial_subprogram (struct partial_die_info *pdi, | |
8215 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8216 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
8217 | { |
8218 | if (pdi->tag == DW_TAG_subprogram) | |
8219 | { | |
8220 | if (pdi->has_pc_info) | |
8221 | { | |
8222 | if (pdi->lowpc < *lowpc) | |
8223 | *lowpc = pdi->lowpc; | |
8224 | if (pdi->highpc > *highpc) | |
8225 | *highpc = pdi->highpc; | |
cdc07690 | 8226 | if (set_addrmap) |
5734ee8b | 8227 | { |
5734ee8b | 8228 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
8229 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
8230 | CORE_ADDR baseaddr; | |
8231 | CORE_ADDR highpc; | |
8232 | CORE_ADDR lowpc; | |
5734ee8b DJ |
8233 | |
8234 | baseaddr = ANOFFSET (objfile->section_offsets, | |
8235 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
8236 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
8237 | pdi->lowpc + baseaddr); | |
8238 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
8239 | pdi->highpc + baseaddr); | |
8240 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 8241 | cu->per_cu->v.psymtab); |
5734ee8b | 8242 | } |
481860b3 GB |
8243 | } |
8244 | ||
8245 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8246 | { | |
bc30ff58 | 8247 | if (!pdi->is_declaration) |
e8d05480 JB |
8248 | /* Ignore subprogram DIEs that do not have a name, they are |
8249 | illegal. Do not emit a complaint at this point, we will | |
8250 | do so when we convert this psymtab into a symtab. */ | |
8251 | if (pdi->name) | |
8252 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
8253 | } |
8254 | } | |
6e70227d | 8255 | |
bc30ff58 JB |
8256 | if (! pdi->has_children) |
8257 | return; | |
8258 | ||
8259 | if (cu->language == language_ada) | |
8260 | { | |
8261 | pdi = pdi->die_child; | |
8262 | while (pdi != NULL) | |
8263 | { | |
8264 | fixup_partial_die (pdi, cu); | |
8265 | if (pdi->tag == DW_TAG_subprogram | |
8266 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 8267 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8268 | pdi = pdi->die_sibling; |
8269 | } | |
8270 | } | |
8271 | } | |
8272 | ||
91c24f0a DC |
8273 | /* Read a partial die corresponding to an enumeration type. */ |
8274 | ||
72bf9492 DJ |
8275 | static void |
8276 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8277 | struct dwarf2_cu *cu) | |
91c24f0a | 8278 | { |
72bf9492 | 8279 | struct partial_die_info *pdi; |
91c24f0a DC |
8280 | |
8281 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8282 | add_partial_symbol (enum_pdi, cu); |
8283 | ||
8284 | pdi = enum_pdi->die_child; | |
8285 | while (pdi) | |
91c24f0a | 8286 | { |
72bf9492 | 8287 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 8288 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 8289 | else |
72bf9492 DJ |
8290 | add_partial_symbol (pdi, cu); |
8291 | pdi = pdi->die_sibling; | |
91c24f0a | 8292 | } |
91c24f0a DC |
8293 | } |
8294 | ||
6caca83c CC |
8295 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8296 | ||
8297 | static unsigned int | |
d521ce57 | 8298 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8299 | { |
8300 | unsigned int bytes_read; | |
8301 | ||
8302 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8303 | } | |
8304 | ||
4bb7a0a7 DJ |
8305 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
8306 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
8307 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8308 | the initial number. */ | |
8309 | ||
8310 | static struct abbrev_info * | |
d521ce57 | 8311 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 8312 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
8313 | { |
8314 | bfd *abfd = cu->objfile->obfd; | |
8315 | unsigned int abbrev_number; | |
8316 | struct abbrev_info *abbrev; | |
8317 | ||
8318 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
8319 | ||
8320 | if (abbrev_number == 0) | |
8321 | return NULL; | |
8322 | ||
433df2d4 | 8323 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
8324 | if (!abbrev) |
8325 | { | |
422b9917 DE |
8326 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
8327 | " at offset 0x%x [in module %s]"), | |
8328 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 8329 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8330 | } |
8331 | ||
8332 | return abbrev; | |
8333 | } | |
8334 | ||
93311388 DE |
8335 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8336 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8337 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8338 | ||
d521ce57 TT |
8339 | static const gdb_byte * |
8340 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8341 | { |
dee91e82 | 8342 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
8343 | struct abbrev_info *abbrev; |
8344 | unsigned int bytes_read; | |
8345 | ||
8346 | while (1) | |
8347 | { | |
8348 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
8349 | if (abbrev == NULL) | |
8350 | return info_ptr + bytes_read; | |
8351 | else | |
dee91e82 | 8352 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8353 | } |
8354 | } | |
8355 | ||
93311388 DE |
8356 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8357 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8358 | abbrev corresponding to that skipped uleb128 should be passed in |
8359 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8360 | children. */ | |
8361 | ||
d521ce57 TT |
8362 | static const gdb_byte * |
8363 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8364 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8365 | { |
8366 | unsigned int bytes_read; | |
8367 | struct attribute attr; | |
dee91e82 DE |
8368 | bfd *abfd = reader->abfd; |
8369 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8370 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8371 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8372 | unsigned int form, i; |
8373 | ||
8374 | for (i = 0; i < abbrev->num_attrs; i++) | |
8375 | { | |
8376 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8377 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8378 | { | |
dee91e82 | 8379 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 8380 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
8381 | complaint (&symfile_complaints, |
8382 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 8383 | else |
b9502d3f | 8384 | { |
9c541725 PA |
8385 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8386 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8387 | |
8388 | if (sibling_ptr < info_ptr) | |
8389 | complaint (&symfile_complaints, | |
8390 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
8391 | else if (sibling_ptr > reader->buffer_end) |
8392 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
8393 | else |
8394 | return sibling_ptr; | |
8395 | } | |
4bb7a0a7 DJ |
8396 | } |
8397 | ||
8398 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8399 | form = abbrev->attrs[i].form; | |
8400 | skip_attribute: | |
8401 | switch (form) | |
8402 | { | |
4bb7a0a7 | 8403 | case DW_FORM_ref_addr: |
ae411497 TT |
8404 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8405 | and later it is offset sized. */ | |
8406 | if (cu->header.version == 2) | |
8407 | info_ptr += cu->header.addr_size; | |
8408 | else | |
8409 | info_ptr += cu->header.offset_size; | |
8410 | break; | |
36586728 TT |
8411 | case DW_FORM_GNU_ref_alt: |
8412 | info_ptr += cu->header.offset_size; | |
8413 | break; | |
ae411497 | 8414 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8415 | info_ptr += cu->header.addr_size; |
8416 | break; | |
8417 | case DW_FORM_data1: | |
8418 | case DW_FORM_ref1: | |
8419 | case DW_FORM_flag: | |
8420 | info_ptr += 1; | |
8421 | break; | |
2dc7f7b3 | 8422 | case DW_FORM_flag_present: |
43988095 | 8423 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8424 | break; |
4bb7a0a7 DJ |
8425 | case DW_FORM_data2: |
8426 | case DW_FORM_ref2: | |
8427 | info_ptr += 2; | |
8428 | break; | |
8429 | case DW_FORM_data4: | |
8430 | case DW_FORM_ref4: | |
8431 | info_ptr += 4; | |
8432 | break; | |
8433 | case DW_FORM_data8: | |
8434 | case DW_FORM_ref8: | |
55f1336d | 8435 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8436 | info_ptr += 8; |
8437 | break; | |
0224619f JK |
8438 | case DW_FORM_data16: |
8439 | info_ptr += 16; | |
8440 | break; | |
4bb7a0a7 | 8441 | case DW_FORM_string: |
9b1c24c8 | 8442 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8443 | info_ptr += bytes_read; |
8444 | break; | |
2dc7f7b3 | 8445 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8446 | case DW_FORM_strp: |
36586728 | 8447 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8448 | info_ptr += cu->header.offset_size; |
8449 | break; | |
2dc7f7b3 | 8450 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8451 | case DW_FORM_block: |
8452 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8453 | info_ptr += bytes_read; | |
8454 | break; | |
8455 | case DW_FORM_block1: | |
8456 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8457 | break; | |
8458 | case DW_FORM_block2: | |
8459 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8460 | break; | |
8461 | case DW_FORM_block4: | |
8462 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8463 | break; | |
8464 | case DW_FORM_sdata: | |
8465 | case DW_FORM_udata: | |
8466 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8467 | case DW_FORM_GNU_addr_index: |
8468 | case DW_FORM_GNU_str_index: | |
d521ce57 | 8469 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8470 | break; |
8471 | case DW_FORM_indirect: | |
8472 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8473 | info_ptr += bytes_read; | |
8474 | /* We need to continue parsing from here, so just go back to | |
8475 | the top. */ | |
8476 | goto skip_attribute; | |
8477 | ||
8478 | default: | |
3e43a32a MS |
8479 | error (_("Dwarf Error: Cannot handle %s " |
8480 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8481 | dwarf_form_name (form), |
8482 | bfd_get_filename (abfd)); | |
8483 | } | |
8484 | } | |
8485 | ||
8486 | if (abbrev->has_children) | |
dee91e82 | 8487 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8488 | else |
8489 | return info_ptr; | |
8490 | } | |
8491 | ||
93311388 | 8492 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8493 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8494 | |
d521ce57 | 8495 | static const gdb_byte * |
dee91e82 DE |
8496 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8497 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8498 | const gdb_byte *info_ptr) |
91c24f0a DC |
8499 | { |
8500 | /* Do we know the sibling already? */ | |
72bf9492 | 8501 | |
91c24f0a DC |
8502 | if (orig_pdi->sibling) |
8503 | return orig_pdi->sibling; | |
8504 | ||
8505 | /* Are there any children to deal with? */ | |
8506 | ||
8507 | if (!orig_pdi->has_children) | |
8508 | return info_ptr; | |
8509 | ||
4bb7a0a7 | 8510 | /* Skip the children the long way. */ |
91c24f0a | 8511 | |
dee91e82 | 8512 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8513 | } |
8514 | ||
257e7a09 | 8515 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8516 | not NULL. */ |
c906108c SS |
8517 | |
8518 | static void | |
257e7a09 YQ |
8519 | dwarf2_read_symtab (struct partial_symtab *self, |
8520 | struct objfile *objfile) | |
c906108c | 8521 | { |
257e7a09 | 8522 | if (self->readin) |
c906108c | 8523 | { |
442e4d9c | 8524 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 8525 | self->filename); |
442e4d9c YQ |
8526 | } |
8527 | else | |
8528 | { | |
8529 | if (info_verbose) | |
c906108c | 8530 | { |
442e4d9c | 8531 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 8532 | self->filename); |
442e4d9c | 8533 | gdb_flush (gdb_stdout); |
c906108c | 8534 | } |
c906108c | 8535 | |
442e4d9c | 8536 | /* Restore our global data. */ |
9a3c8263 SM |
8537 | dwarf2_per_objfile |
8538 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
8539 | dwarf2_objfile_data_key); | |
10b3939b | 8540 | |
442e4d9c YQ |
8541 | /* If this psymtab is constructed from a debug-only objfile, the |
8542 | has_section_at_zero flag will not necessarily be correct. We | |
8543 | can get the correct value for this flag by looking at the data | |
8544 | associated with the (presumably stripped) associated objfile. */ | |
8545 | if (objfile->separate_debug_objfile_backlink) | |
8546 | { | |
8547 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
8548 | = ((struct dwarf2_per_objfile *) |
8549 | objfile_data (objfile->separate_debug_objfile_backlink, | |
8550 | dwarf2_objfile_data_key)); | |
9a619af0 | 8551 | |
442e4d9c YQ |
8552 | dwarf2_per_objfile->has_section_at_zero |
8553 | = dpo_backlink->has_section_at_zero; | |
8554 | } | |
b2ab525c | 8555 | |
442e4d9c | 8556 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 8557 | |
257e7a09 | 8558 | psymtab_to_symtab_1 (self); |
c906108c | 8559 | |
442e4d9c YQ |
8560 | /* Finish up the debug error message. */ |
8561 | if (info_verbose) | |
8562 | printf_filtered (_("done.\n")); | |
c906108c | 8563 | } |
95554aad TT |
8564 | |
8565 | process_cu_includes (); | |
c906108c | 8566 | } |
9cdd5dbd DE |
8567 | \f |
8568 | /* Reading in full CUs. */ | |
c906108c | 8569 | |
10b3939b DJ |
8570 | /* Add PER_CU to the queue. */ |
8571 | ||
8572 | static void | |
95554aad TT |
8573 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8574 | enum language pretend_language) | |
10b3939b DJ |
8575 | { |
8576 | struct dwarf2_queue_item *item; | |
8577 | ||
8578 | per_cu->queued = 1; | |
8d749320 | 8579 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 8580 | item->per_cu = per_cu; |
95554aad | 8581 | item->pretend_language = pretend_language; |
10b3939b DJ |
8582 | item->next = NULL; |
8583 | ||
8584 | if (dwarf2_queue == NULL) | |
8585 | dwarf2_queue = item; | |
8586 | else | |
8587 | dwarf2_queue_tail->next = item; | |
8588 | ||
8589 | dwarf2_queue_tail = item; | |
8590 | } | |
8591 | ||
89e63ee4 DE |
8592 | /* If PER_CU is not yet queued, add it to the queue. |
8593 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8594 | dependency. | |
0907af0c | 8595 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8596 | meaning either PER_CU is already queued or it is already loaded. |
8597 | ||
8598 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8599 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8600 | |
8601 | static int | |
89e63ee4 | 8602 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8603 | struct dwarf2_per_cu_data *per_cu, |
8604 | enum language pretend_language) | |
8605 | { | |
8606 | /* We may arrive here during partial symbol reading, if we need full | |
8607 | DIEs to process an unusual case (e.g. template arguments). Do | |
8608 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
8609 | if (dwarf2_per_objfile->reading_partial_symbols) | |
8610 | { | |
8611 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8612 | return 1; | |
8613 | return 0; | |
8614 | } | |
8615 | ||
8616 | /* Mark the dependence relation so that we don't flush PER_CU | |
8617 | too early. */ | |
89e63ee4 DE |
8618 | if (dependent_cu != NULL) |
8619 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8620 | |
8621 | /* If it's already on the queue, we have nothing to do. */ | |
8622 | if (per_cu->queued) | |
8623 | return 0; | |
8624 | ||
8625 | /* If the compilation unit is already loaded, just mark it as | |
8626 | used. */ | |
8627 | if (per_cu->cu != NULL) | |
8628 | { | |
8629 | per_cu->cu->last_used = 0; | |
8630 | return 0; | |
8631 | } | |
8632 | ||
8633 | /* Add it to the queue. */ | |
8634 | queue_comp_unit (per_cu, pretend_language); | |
8635 | ||
8636 | return 1; | |
8637 | } | |
8638 | ||
10b3939b DJ |
8639 | /* Process the queue. */ |
8640 | ||
8641 | static void | |
a0f42c21 | 8642 | process_queue (void) |
10b3939b DJ |
8643 | { |
8644 | struct dwarf2_queue_item *item, *next_item; | |
8645 | ||
b4f54984 | 8646 | if (dwarf_read_debug) |
45cfd468 DE |
8647 | { |
8648 | fprintf_unfiltered (gdb_stdlog, | |
8649 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8650 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8651 | } |
8652 | ||
03dd20cc DJ |
8653 | /* The queue starts out with one item, but following a DIE reference |
8654 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
8655 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
8656 | { | |
cc12ce38 DE |
8657 | if ((dwarf2_per_objfile->using_index |
8658 | ? !item->per_cu->v.quick->compunit_symtab | |
8659 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
8660 | /* Skip dummy CUs. */ | |
8661 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
8662 | { |
8663 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 8664 | unsigned int debug_print_threshold; |
247f5c4f | 8665 | char buf[100]; |
f4dc4d17 | 8666 | |
247f5c4f | 8667 | if (per_cu->is_debug_types) |
f4dc4d17 | 8668 | { |
247f5c4f DE |
8669 | struct signatured_type *sig_type = |
8670 | (struct signatured_type *) per_cu; | |
8671 | ||
8672 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 8673 | hex_string (sig_type->signature), |
9c541725 | 8674 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
8675 | /* There can be 100s of TUs. |
8676 | Only print them in verbose mode. */ | |
8677 | debug_print_threshold = 2; | |
f4dc4d17 | 8678 | } |
247f5c4f | 8679 | else |
73be47f5 | 8680 | { |
9c541725 PA |
8681 | sprintf (buf, "CU at offset 0x%x", |
8682 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
8683 | debug_print_threshold = 1; |
8684 | } | |
247f5c4f | 8685 | |
b4f54984 | 8686 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8687 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8688 | |
8689 | if (per_cu->is_debug_types) | |
8690 | process_full_type_unit (per_cu, item->pretend_language); | |
8691 | else | |
8692 | process_full_comp_unit (per_cu, item->pretend_language); | |
8693 | ||
b4f54984 | 8694 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8695 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8696 | } |
10b3939b DJ |
8697 | |
8698 | item->per_cu->queued = 0; | |
8699 | next_item = item->next; | |
8700 | xfree (item); | |
8701 | } | |
8702 | ||
8703 | dwarf2_queue_tail = NULL; | |
45cfd468 | 8704 | |
b4f54984 | 8705 | if (dwarf_read_debug) |
45cfd468 DE |
8706 | { |
8707 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8708 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8709 | } |
10b3939b DJ |
8710 | } |
8711 | ||
8712 | /* Free all allocated queue entries. This function only releases anything if | |
8713 | an error was thrown; if the queue was processed then it would have been | |
8714 | freed as we went along. */ | |
8715 | ||
8716 | static void | |
8717 | dwarf2_release_queue (void *dummy) | |
8718 | { | |
8719 | struct dwarf2_queue_item *item, *last; | |
8720 | ||
8721 | item = dwarf2_queue; | |
8722 | while (item) | |
8723 | { | |
8724 | /* Anything still marked queued is likely to be in an | |
8725 | inconsistent state, so discard it. */ | |
8726 | if (item->per_cu->queued) | |
8727 | { | |
8728 | if (item->per_cu->cu != NULL) | |
dee91e82 | 8729 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
8730 | item->per_cu->queued = 0; |
8731 | } | |
8732 | ||
8733 | last = item; | |
8734 | item = item->next; | |
8735 | xfree (last); | |
8736 | } | |
8737 | ||
8738 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
8739 | } | |
8740 | ||
8741 | /* Read in full symbols for PST, and anything it depends on. */ | |
8742 | ||
c906108c | 8743 | static void |
fba45db2 | 8744 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 8745 | { |
10b3939b | 8746 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
8747 | int i; |
8748 | ||
95554aad TT |
8749 | if (pst->readin) |
8750 | return; | |
8751 | ||
aaa75496 | 8752 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
8753 | if (!pst->dependencies[i]->readin |
8754 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
8755 | { |
8756 | /* Inform about additional files that need to be read in. */ | |
8757 | if (info_verbose) | |
8758 | { | |
a3f17187 | 8759 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
8760 | fputs_filtered (" ", gdb_stdout); |
8761 | wrap_here (""); | |
8762 | fputs_filtered ("and ", gdb_stdout); | |
8763 | wrap_here (""); | |
8764 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 8765 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
8766 | gdb_flush (gdb_stdout); |
8767 | } | |
8768 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
8769 | } | |
8770 | ||
9a3c8263 | 8771 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
8772 | |
8773 | if (per_cu == NULL) | |
aaa75496 JB |
8774 | { |
8775 | /* It's an include file, no symbols to read for it. | |
8776 | Everything is in the parent symtab. */ | |
8777 | pst->readin = 1; | |
8778 | return; | |
8779 | } | |
c906108c | 8780 | |
a0f42c21 | 8781 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
8782 | } |
8783 | ||
dee91e82 DE |
8784 | /* Trivial hash function for die_info: the hash value of a DIE |
8785 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8786 | |
dee91e82 DE |
8787 | static hashval_t |
8788 | die_hash (const void *item) | |
10b3939b | 8789 | { |
9a3c8263 | 8790 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8791 | |
9c541725 | 8792 | return to_underlying (die->sect_off); |
dee91e82 | 8793 | } |
63d06c5c | 8794 | |
dee91e82 DE |
8795 | /* Trivial comparison function for die_info structures: two DIEs |
8796 | are equal if they have the same offset. */ | |
98bfdba5 | 8797 | |
dee91e82 DE |
8798 | static int |
8799 | die_eq (const void *item_lhs, const void *item_rhs) | |
8800 | { | |
9a3c8263 SM |
8801 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8802 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8803 | |
9c541725 | 8804 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8805 | } |
c906108c | 8806 | |
dee91e82 DE |
8807 | /* die_reader_func for load_full_comp_unit. |
8808 | This is identical to read_signatured_type_reader, | |
8809 | but is kept separate for now. */ | |
c906108c | 8810 | |
dee91e82 DE |
8811 | static void |
8812 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8813 | const gdb_byte *info_ptr, |
dee91e82 DE |
8814 | struct die_info *comp_unit_die, |
8815 | int has_children, | |
8816 | void *data) | |
8817 | { | |
8818 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 8819 | enum language *language_ptr = (enum language *) data; |
6caca83c | 8820 | |
dee91e82 DE |
8821 | gdb_assert (cu->die_hash == NULL); |
8822 | cu->die_hash = | |
8823 | htab_create_alloc_ex (cu->header.length / 12, | |
8824 | die_hash, | |
8825 | die_eq, | |
8826 | NULL, | |
8827 | &cu->comp_unit_obstack, | |
8828 | hashtab_obstack_allocate, | |
8829 | dummy_obstack_deallocate); | |
e142c38c | 8830 | |
dee91e82 DE |
8831 | if (has_children) |
8832 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
8833 | &info_ptr, comp_unit_die); | |
8834 | cu->dies = comp_unit_die; | |
8835 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
8836 | |
8837 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8838 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8839 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8840 | or we won't be able to build types correctly. |
8841 | Similarly, if we do not read the producer, we can not apply | |
8842 | producer-specific interpretation. */ | |
95554aad | 8843 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 8844 | } |
10b3939b | 8845 | |
dee91e82 | 8846 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 8847 | |
dee91e82 | 8848 | static void |
95554aad TT |
8849 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8850 | enum language pretend_language) | |
dee91e82 | 8851 | { |
3019eac3 | 8852 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 8853 | |
f4dc4d17 DE |
8854 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8855 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
8856 | } |
8857 | ||
3da10d80 KS |
8858 | /* Add a DIE to the delayed physname list. */ |
8859 | ||
8860 | static void | |
8861 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8862 | const char *name, struct die_info *die, | |
8863 | struct dwarf2_cu *cu) | |
8864 | { | |
8865 | struct delayed_method_info mi; | |
8866 | mi.type = type; | |
8867 | mi.fnfield_index = fnfield_index; | |
8868 | mi.index = index; | |
8869 | mi.name = name; | |
8870 | mi.die = die; | |
8871 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8872 | } | |
8873 | ||
8874 | /* A cleanup for freeing the delayed method list. */ | |
8875 | ||
8876 | static void | |
8877 | free_delayed_list (void *ptr) | |
8878 | { | |
8879 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8880 | if (cu->method_list != NULL) | |
8881 | { | |
8882 | VEC_free (delayed_method_info, cu->method_list); | |
8883 | cu->method_list = NULL; | |
8884 | } | |
8885 | } | |
8886 | ||
3693fdb3 PA |
8887 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8888 | "const" / "volatile". If so, decrements LEN by the length of the | |
8889 | modifier and return true. Otherwise return false. */ | |
8890 | ||
8891 | template<size_t N> | |
8892 | static bool | |
8893 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8894 | { | |
8895 | size_t mod_len = sizeof (mod) - 1; | |
8896 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8897 | { | |
8898 | len -= mod_len; | |
8899 | return true; | |
8900 | } | |
8901 | return false; | |
8902 | } | |
8903 | ||
3da10d80 KS |
8904 | /* Compute the physnames of any methods on the CU's method list. |
8905 | ||
8906 | The computation of method physnames is delayed in order to avoid the | |
8907 | (bad) condition that one of the method's formal parameters is of an as yet | |
8908 | incomplete type. */ | |
8909 | ||
8910 | static void | |
8911 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8912 | { | |
8913 | int i; | |
8914 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8915 | |
8916 | /* Only C++ delays computing physnames. */ | |
8917 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8918 | return; | |
8919 | gdb_assert (cu->language == language_cplus); | |
8920 | ||
3da10d80 KS |
8921 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8922 | { | |
1d06ead6 | 8923 | const char *physname; |
3da10d80 KS |
8924 | struct fn_fieldlist *fn_flp |
8925 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8926 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8927 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8928 | = physname ? physname : ""; | |
3693fdb3 PA |
8929 | |
8930 | /* Since there's no tag to indicate whether a method is a | |
8931 | const/volatile overload, extract that information out of the | |
8932 | demangled name. */ | |
8933 | if (physname != NULL) | |
8934 | { | |
8935 | size_t len = strlen (physname); | |
8936 | ||
8937 | while (1) | |
8938 | { | |
8939 | if (physname[len] == ')') /* shortcut */ | |
8940 | break; | |
8941 | else if (check_modifier (physname, len, " const")) | |
8942 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8943 | else if (check_modifier (physname, len, " volatile")) | |
8944 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8945 | else | |
8946 | break; | |
8947 | } | |
8948 | } | |
3da10d80 KS |
8949 | } |
8950 | } | |
8951 | ||
a766d390 DE |
8952 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8953 | and it's not clear if/how imported objects will appear. | |
8954 | To keep Go support simple until that's worked out, | |
8955 | go back through what we've read and create something usable. | |
8956 | We could do this while processing each DIE, and feels kinda cleaner, | |
8957 | but that way is more invasive. | |
8958 | This is to, for example, allow the user to type "p var" or "b main" | |
8959 | without having to specify the package name, and allow lookups | |
8960 | of module.object to work in contexts that use the expression | |
8961 | parser. */ | |
8962 | ||
8963 | static void | |
8964 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8965 | { | |
8966 | char *package_name = NULL; | |
8967 | struct pending *list; | |
8968 | int i; | |
8969 | ||
8970 | for (list = global_symbols; list != NULL; list = list->next) | |
8971 | { | |
8972 | for (i = 0; i < list->nsyms; ++i) | |
8973 | { | |
8974 | struct symbol *sym = list->symbol[i]; | |
8975 | ||
8976 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8977 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8978 | { | |
8979 | char *this_package_name = go_symbol_package_name (sym); | |
8980 | ||
8981 | if (this_package_name == NULL) | |
8982 | continue; | |
8983 | if (package_name == NULL) | |
8984 | package_name = this_package_name; | |
8985 | else | |
8986 | { | |
8987 | if (strcmp (package_name, this_package_name) != 0) | |
8988 | complaint (&symfile_complaints, | |
8989 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8990 | (symbol_symtab (sym) != NULL |
8991 | ? symtab_to_filename_for_display | |
8992 | (symbol_symtab (sym)) | |
4262abfb | 8993 | : objfile_name (cu->objfile)), |
a766d390 DE |
8994 | this_package_name, package_name); |
8995 | xfree (this_package_name); | |
8996 | } | |
8997 | } | |
8998 | } | |
8999 | } | |
9000 | ||
9001 | if (package_name != NULL) | |
9002 | { | |
9003 | struct objfile *objfile = cu->objfile; | |
34a68019 | 9004 | const char *saved_package_name |
224c3ddb SM |
9005 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
9006 | package_name, | |
9007 | strlen (package_name)); | |
19f392bc UW |
9008 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9009 | saved_package_name); | |
a766d390 DE |
9010 | struct symbol *sym; |
9011 | ||
9012 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
9013 | ||
e623cf5d | 9014 | sym = allocate_symbol (objfile); |
f85f34ed | 9015 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
9016 | SYMBOL_SET_NAMES (sym, saved_package_name, |
9017 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
9018 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9019 | e.g., "main" finds the "main" module and not C's main(). */ | |
9020 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9021 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9022 | SYMBOL_TYPE (sym) = type; |
9023 | ||
9024 | add_symbol_to_list (sym, &global_symbols); | |
9025 | ||
9026 | xfree (package_name); | |
9027 | } | |
9028 | } | |
9029 | ||
95554aad TT |
9030 | /* Return the symtab for PER_CU. This works properly regardless of |
9031 | whether we're using the index or psymtabs. */ | |
9032 | ||
43f3e411 DE |
9033 | static struct compunit_symtab * |
9034 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
9035 | { |
9036 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
9037 | ? per_cu->v.quick->compunit_symtab |
9038 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
9039 | } |
9040 | ||
9041 | /* A helper function for computing the list of all symbol tables | |
9042 | included by PER_CU. */ | |
9043 | ||
9044 | static void | |
43f3e411 | 9045 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 9046 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 9047 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 9048 | struct compunit_symtab *immediate_parent) |
95554aad TT |
9049 | { |
9050 | void **slot; | |
9051 | int ix; | |
43f3e411 | 9052 | struct compunit_symtab *cust; |
95554aad TT |
9053 | struct dwarf2_per_cu_data *iter; |
9054 | ||
9055 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
9056 | if (*slot != NULL) | |
9057 | { | |
9058 | /* This inclusion and its children have been processed. */ | |
9059 | return; | |
9060 | } | |
9061 | ||
9062 | *slot = per_cu; | |
9063 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
9064 | cust = get_compunit_symtab (per_cu); |
9065 | if (cust != NULL) | |
ec94af83 DE |
9066 | { |
9067 | /* If this is a type unit only add its symbol table if we haven't | |
9068 | seen it yet (type unit per_cu's can share symtabs). */ | |
9069 | if (per_cu->is_debug_types) | |
9070 | { | |
43f3e411 | 9071 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9072 | if (*slot == NULL) |
9073 | { | |
43f3e411 DE |
9074 | *slot = cust; |
9075 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
9076 | if (cust->user == NULL) | |
9077 | cust->user = immediate_parent; | |
ec94af83 DE |
9078 | } |
9079 | } | |
9080 | else | |
f9125b6c | 9081 | { |
43f3e411 DE |
9082 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
9083 | if (cust->user == NULL) | |
9084 | cust->user = immediate_parent; | |
f9125b6c | 9085 | } |
ec94af83 | 9086 | } |
95554aad TT |
9087 | |
9088 | for (ix = 0; | |
796a7ff8 | 9089 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 9090 | ++ix) |
ec94af83 DE |
9091 | { |
9092 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 9093 | all_type_symtabs, iter, cust); |
ec94af83 | 9094 | } |
95554aad TT |
9095 | } |
9096 | ||
43f3e411 | 9097 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9098 | PER_CU. */ |
9099 | ||
9100 | static void | |
43f3e411 | 9101 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 9102 | { |
f4dc4d17 DE |
9103 | gdb_assert (! per_cu->is_debug_types); |
9104 | ||
796a7ff8 | 9105 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
9106 | { |
9107 | int ix, len; | |
ec94af83 | 9108 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
9109 | struct compunit_symtab *compunit_symtab_iter; |
9110 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 9111 | htab_t all_children, all_type_symtabs; |
43f3e411 | 9112 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
9113 | |
9114 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9115 | if (cust == NULL) |
95554aad TT |
9116 | return; |
9117 | ||
9118 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
9119 | NULL, xcalloc, xfree); | |
ec94af83 DE |
9120 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
9121 | NULL, xcalloc, xfree); | |
95554aad TT |
9122 | |
9123 | for (ix = 0; | |
796a7ff8 | 9124 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 9125 | ix, per_cu_iter); |
95554aad | 9126 | ++ix) |
ec94af83 DE |
9127 | { |
9128 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 9129 | all_type_symtabs, per_cu_iter, |
43f3e411 | 9130 | cust); |
ec94af83 | 9131 | } |
95554aad | 9132 | |
ec94af83 | 9133 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
9134 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
9135 | cust->includes | |
8d749320 SM |
9136 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
9137 | struct compunit_symtab *, len + 1); | |
95554aad | 9138 | for (ix = 0; |
43f3e411 DE |
9139 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
9140 | compunit_symtab_iter); | |
95554aad | 9141 | ++ix) |
43f3e411 DE |
9142 | cust->includes[ix] = compunit_symtab_iter; |
9143 | cust->includes[len] = NULL; | |
95554aad | 9144 | |
43f3e411 | 9145 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 9146 | htab_delete (all_children); |
ec94af83 | 9147 | htab_delete (all_type_symtabs); |
95554aad TT |
9148 | } |
9149 | } | |
9150 | ||
9151 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9152 | read. */ | |
9153 | ||
9154 | static void | |
9155 | process_cu_includes (void) | |
9156 | { | |
9157 | int ix; | |
9158 | struct dwarf2_per_cu_data *iter; | |
9159 | ||
9160 | for (ix = 0; | |
9161 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
9162 | ix, iter); | |
9163 | ++ix) | |
f4dc4d17 DE |
9164 | { |
9165 | if (! iter->is_debug_types) | |
43f3e411 | 9166 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 9167 | } |
95554aad TT |
9168 | |
9169 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
9170 | } | |
9171 | ||
9cdd5dbd | 9172 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
9173 | already been loaded into memory. */ |
9174 | ||
9175 | static void | |
95554aad TT |
9176 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9177 | enum language pretend_language) | |
10b3939b | 9178 | { |
10b3939b | 9179 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 9180 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 9181 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 9182 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9183 | struct compunit_symtab *cust; |
33c7c59d | 9184 | struct cleanup *delayed_list_cleanup; |
10b3939b | 9185 | CORE_ADDR baseaddr; |
4359dff1 | 9186 | struct block *static_block; |
3e29f34a | 9187 | CORE_ADDR addr; |
10b3939b DJ |
9188 | |
9189 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
9190 | ||
10b3939b | 9191 | buildsym_init (); |
33c7c59d | 9192 | scoped_free_pendings free_pending; |
3da10d80 | 9193 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
9194 | |
9195 | cu->list_in_scope = &file_symbols; | |
c906108c | 9196 | |
95554aad TT |
9197 | cu->language = pretend_language; |
9198 | cu->language_defn = language_def (cu->language); | |
9199 | ||
c906108c | 9200 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9201 | process_die (cu->dies, cu); |
c906108c | 9202 | |
a766d390 DE |
9203 | /* For now fudge the Go package. */ |
9204 | if (cu->language == language_go) | |
9205 | fixup_go_packaging (cu); | |
9206 | ||
3da10d80 KS |
9207 | /* Now that we have processed all the DIEs in the CU, all the types |
9208 | should be complete, and it should now be safe to compute all of the | |
9209 | physnames. */ | |
9210 | compute_delayed_physnames (cu); | |
9211 | do_cleanups (delayed_list_cleanup); | |
9212 | ||
fae299cd DC |
9213 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9214 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9215 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9216 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9217 | |
3e29f34a MR |
9218 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
9219 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
9220 | |
9221 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9222 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9223 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9224 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9225 | this comp unit. */ | |
9226 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9227 | ||
43f3e411 DE |
9228 | cust = end_symtab_from_static_block (static_block, |
9229 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 9230 | |
43f3e411 | 9231 | if (cust != NULL) |
c906108c | 9232 | { |
df15bd07 | 9233 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9234 | |
8be455d7 JK |
9235 | /* Set symtab language to language from DW_AT_language. If the |
9236 | compilation is from a C file generated by language preprocessors, do | |
9237 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9238 | if (!(cu->language == language_c |
40e3ad0e | 9239 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9240 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9241 | |
9242 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9243 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9244 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9245 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9246 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9247 | |
9248 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9249 | needed, it would be wrong due to missing DW_AT_producer there. | |
9250 | ||
9251 | Still one can confuse GDB by using non-standard GCC compilation | |
9252 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
9253 | */ | |
ab260dad | 9254 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9255 | cust->locations_valid = 1; |
e0d00bc7 JK |
9256 | |
9257 | if (gcc_4_minor >= 5) | |
43f3e411 | 9258 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9259 | |
43f3e411 | 9260 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9261 | } |
9291a0cd TT |
9262 | |
9263 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9264 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
9265 | else |
9266 | { | |
9267 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9268 | pst->compunit_symtab = cust; |
9291a0cd TT |
9269 | pst->readin = 1; |
9270 | } | |
c906108c | 9271 | |
95554aad TT |
9272 | /* Push it for inclusion processing later. */ |
9273 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
f4dc4d17 | 9274 | } |
45cfd468 | 9275 | |
f4dc4d17 DE |
9276 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9277 | already been loaded into memory. */ | |
9278 | ||
9279 | static void | |
9280 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9281 | enum language pretend_language) | |
9282 | { | |
9283 | struct dwarf2_cu *cu = per_cu->cu; | |
9284 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 9285 | struct compunit_symtab *cust; |
33c7c59d | 9286 | struct cleanup *delayed_list_cleanup; |
0186c6a7 DE |
9287 | struct signatured_type *sig_type; |
9288 | ||
9289 | gdb_assert (per_cu->is_debug_types); | |
9290 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
9291 | |
9292 | buildsym_init (); | |
33c7c59d | 9293 | scoped_free_pendings free_pending; |
f4dc4d17 DE |
9294 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
9295 | ||
9296 | cu->list_in_scope = &file_symbols; | |
9297 | ||
9298 | cu->language = pretend_language; | |
9299 | cu->language_defn = language_def (cu->language); | |
9300 | ||
9301 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9302 | process_die (cu->dies, cu); | |
9303 | ||
9304 | /* For now fudge the Go package. */ | |
9305 | if (cu->language == language_go) | |
9306 | fixup_go_packaging (cu); | |
9307 | ||
9308 | /* Now that we have processed all the DIEs in the CU, all the types | |
9309 | should be complete, and it should now be safe to compute all of the | |
9310 | physnames. */ | |
9311 | compute_delayed_physnames (cu); | |
9312 | do_cleanups (delayed_list_cleanup); | |
9313 | ||
9314 | /* TUs share symbol tables. | |
9315 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9316 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9317 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9318 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9319 | { |
43f3e411 DE |
9320 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
9321 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 9322 | |
43f3e411 | 9323 | if (cust != NULL) |
f4dc4d17 DE |
9324 | { |
9325 | /* Set symtab language to language from DW_AT_language. If the | |
9326 | compilation is from a C file generated by language preprocessors, | |
9327 | do not set the language if it was already deduced by | |
9328 | start_subfile. */ | |
43f3e411 DE |
9329 | if (!(cu->language == language_c |
9330 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9331 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9332 | } |
9333 | } | |
9334 | else | |
9335 | { | |
0ab9ce85 | 9336 | augment_type_symtab (); |
43f3e411 | 9337 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9338 | } |
9339 | ||
9340 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9341 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9342 | else |
9343 | { | |
9344 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9345 | pst->compunit_symtab = cust; |
f4dc4d17 | 9346 | pst->readin = 1; |
45cfd468 | 9347 | } |
c906108c SS |
9348 | } |
9349 | ||
95554aad TT |
9350 | /* Process an imported unit DIE. */ |
9351 | ||
9352 | static void | |
9353 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9354 | { | |
9355 | struct attribute *attr; | |
9356 | ||
f4dc4d17 DE |
9357 | /* For now we don't handle imported units in type units. */ |
9358 | if (cu->per_cu->is_debug_types) | |
9359 | { | |
9360 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9361 | " supported in type units [in module %s]"), | |
4262abfb | 9362 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
9363 | } |
9364 | ||
95554aad TT |
9365 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9366 | if (attr != NULL) | |
9367 | { | |
9c541725 PA |
9368 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9369 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9370 | dwarf2_per_cu_data *per_cu | |
9371 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 9372 | |
69d751e3 | 9373 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
9374 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
9375 | load_full_comp_unit (per_cu, cu->language); | |
9376 | ||
796a7ff8 | 9377 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
9378 | per_cu); |
9379 | } | |
9380 | } | |
9381 | ||
4c8aa72d PA |
9382 | /* RAII object that represents a process_die scope: i.e., |
9383 | starts/finishes processing a DIE. */ | |
9384 | class process_die_scope | |
adde2bff | 9385 | { |
4c8aa72d PA |
9386 | public: |
9387 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9388 | : m_die (die), m_cu (cu) | |
9389 | { | |
9390 | /* We should only be processing DIEs not already in process. */ | |
9391 | gdb_assert (!m_die->in_process); | |
9392 | m_die->in_process = true; | |
9393 | } | |
8c3cb9fa | 9394 | |
4c8aa72d PA |
9395 | ~process_die_scope () |
9396 | { | |
9397 | m_die->in_process = false; | |
9398 | ||
9399 | /* If we're done processing the DIE for the CU that owns the line | |
9400 | header, we don't need the line header anymore. */ | |
9401 | if (m_cu->line_header_die_owner == m_die) | |
9402 | { | |
9403 | delete m_cu->line_header; | |
9404 | m_cu->line_header = NULL; | |
9405 | m_cu->line_header_die_owner = NULL; | |
9406 | } | |
9407 | } | |
9408 | ||
9409 | private: | |
9410 | die_info *m_die; | |
9411 | dwarf2_cu *m_cu; | |
9412 | }; | |
adde2bff | 9413 | |
c906108c SS |
9414 | /* Process a die and its children. */ |
9415 | ||
9416 | static void | |
e7c27a73 | 9417 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9418 | { |
4c8aa72d | 9419 | process_die_scope scope (die, cu); |
adde2bff | 9420 | |
c906108c SS |
9421 | switch (die->tag) |
9422 | { | |
9423 | case DW_TAG_padding: | |
9424 | break; | |
9425 | case DW_TAG_compile_unit: | |
95554aad | 9426 | case DW_TAG_partial_unit: |
e7c27a73 | 9427 | read_file_scope (die, cu); |
c906108c | 9428 | break; |
348e048f DE |
9429 | case DW_TAG_type_unit: |
9430 | read_type_unit_scope (die, cu); | |
9431 | break; | |
c906108c | 9432 | case DW_TAG_subprogram: |
c906108c | 9433 | case DW_TAG_inlined_subroutine: |
edb3359d | 9434 | read_func_scope (die, cu); |
c906108c SS |
9435 | break; |
9436 | case DW_TAG_lexical_block: | |
14898363 L |
9437 | case DW_TAG_try_block: |
9438 | case DW_TAG_catch_block: | |
e7c27a73 | 9439 | read_lexical_block_scope (die, cu); |
c906108c | 9440 | break; |
216f72a1 | 9441 | case DW_TAG_call_site: |
96408a79 SA |
9442 | case DW_TAG_GNU_call_site: |
9443 | read_call_site_scope (die, cu); | |
9444 | break; | |
c906108c | 9445 | case DW_TAG_class_type: |
680b30c7 | 9446 | case DW_TAG_interface_type: |
c906108c SS |
9447 | case DW_TAG_structure_type: |
9448 | case DW_TAG_union_type: | |
134d01f1 | 9449 | process_structure_scope (die, cu); |
c906108c SS |
9450 | break; |
9451 | case DW_TAG_enumeration_type: | |
134d01f1 | 9452 | process_enumeration_scope (die, cu); |
c906108c | 9453 | break; |
134d01f1 | 9454 | |
f792889a DJ |
9455 | /* These dies have a type, but processing them does not create |
9456 | a symbol or recurse to process the children. Therefore we can | |
9457 | read them on-demand through read_type_die. */ | |
c906108c | 9458 | case DW_TAG_subroutine_type: |
72019c9c | 9459 | case DW_TAG_set_type: |
c906108c | 9460 | case DW_TAG_array_type: |
c906108c | 9461 | case DW_TAG_pointer_type: |
c906108c | 9462 | case DW_TAG_ptr_to_member_type: |
c906108c | 9463 | case DW_TAG_reference_type: |
4297a3f0 | 9464 | case DW_TAG_rvalue_reference_type: |
c906108c | 9465 | case DW_TAG_string_type: |
c906108c | 9466 | break; |
134d01f1 | 9467 | |
c906108c | 9468 | case DW_TAG_base_type: |
a02abb62 | 9469 | case DW_TAG_subrange_type: |
cb249c71 | 9470 | case DW_TAG_typedef: |
134d01f1 DJ |
9471 | /* Add a typedef symbol for the type definition, if it has a |
9472 | DW_AT_name. */ | |
f792889a | 9473 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9474 | break; |
c906108c | 9475 | case DW_TAG_common_block: |
e7c27a73 | 9476 | read_common_block (die, cu); |
c906108c SS |
9477 | break; |
9478 | case DW_TAG_common_inclusion: | |
9479 | break; | |
d9fa45fe | 9480 | case DW_TAG_namespace: |
4d4ec4e5 | 9481 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 9482 | read_namespace (die, cu); |
d9fa45fe | 9483 | break; |
5d7cb8df | 9484 | case DW_TAG_module: |
4d4ec4e5 | 9485 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
9486 | read_module (die, cu); |
9487 | break; | |
d9fa45fe | 9488 | case DW_TAG_imported_declaration: |
74921315 KS |
9489 | cu->processing_has_namespace_info = 1; |
9490 | if (read_namespace_alias (die, cu)) | |
9491 | break; | |
9492 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 9493 | case DW_TAG_imported_module: |
4d4ec4e5 | 9494 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
9495 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9496 | || cu->language != language_fortran)) | |
9497 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
9498 | dwarf_tag_name (die->tag)); | |
9499 | read_import_statement (die, cu); | |
d9fa45fe | 9500 | break; |
95554aad TT |
9501 | |
9502 | case DW_TAG_imported_unit: | |
9503 | process_imported_unit_die (die, cu); | |
9504 | break; | |
9505 | ||
71a3c369 TT |
9506 | case DW_TAG_variable: |
9507 | read_variable (die, cu); | |
9508 | break; | |
9509 | ||
c906108c | 9510 | default: |
e7c27a73 | 9511 | new_symbol (die, NULL, cu); |
c906108c SS |
9512 | break; |
9513 | } | |
9514 | } | |
ca69b9e6 DE |
9515 | \f |
9516 | /* DWARF name computation. */ | |
c906108c | 9517 | |
94af9270 KS |
9518 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9519 | needs to have the name of the scope prepended to the name listed in the | |
9520 | die. */ | |
9521 | ||
9522 | static int | |
9523 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9524 | { | |
1c809c68 TT |
9525 | struct attribute *attr; |
9526 | ||
94af9270 KS |
9527 | switch (die->tag) |
9528 | { | |
9529 | case DW_TAG_namespace: | |
9530 | case DW_TAG_typedef: | |
9531 | case DW_TAG_class_type: | |
9532 | case DW_TAG_interface_type: | |
9533 | case DW_TAG_structure_type: | |
9534 | case DW_TAG_union_type: | |
9535 | case DW_TAG_enumeration_type: | |
9536 | case DW_TAG_enumerator: | |
9537 | case DW_TAG_subprogram: | |
08a76f8a | 9538 | case DW_TAG_inlined_subroutine: |
94af9270 | 9539 | case DW_TAG_member: |
74921315 | 9540 | case DW_TAG_imported_declaration: |
94af9270 KS |
9541 | return 1; |
9542 | ||
9543 | case DW_TAG_variable: | |
c2b0a229 | 9544 | case DW_TAG_constant: |
94af9270 KS |
9545 | /* We only need to prefix "globally" visible variables. These include |
9546 | any variable marked with DW_AT_external or any variable that | |
9547 | lives in a namespace. [Variables in anonymous namespaces | |
9548 | require prefixing, but they are not DW_AT_external.] */ | |
9549 | ||
9550 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9551 | { | |
9552 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9553 | |
94af9270 KS |
9554 | return die_needs_namespace (die_specification (die, &spec_cu), |
9555 | spec_cu); | |
9556 | } | |
9557 | ||
1c809c68 | 9558 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9559 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9560 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9561 | return 0; |
9562 | /* A variable in a lexical block of some kind does not need a | |
9563 | namespace, even though in C++ such variables may be external | |
9564 | and have a mangled name. */ | |
9565 | if (die->parent->tag == DW_TAG_lexical_block | |
9566 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9567 | || die->parent->tag == DW_TAG_catch_block |
9568 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9569 | return 0; |
9570 | return 1; | |
94af9270 KS |
9571 | |
9572 | default: | |
9573 | return 0; | |
9574 | } | |
9575 | } | |
9576 | ||
73b9be8b KS |
9577 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9578 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9579 | defined for the given DIE. */ | |
9580 | ||
9581 | static struct attribute * | |
9582 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9583 | { | |
9584 | struct attribute *attr; | |
9585 | ||
9586 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9587 | if (attr == NULL) | |
9588 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9589 | ||
9590 | return attr; | |
9591 | } | |
9592 | ||
9593 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9594 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9595 | defined for the given DIE. */ | |
9596 | ||
9597 | static const char * | |
9598 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9599 | { | |
9600 | const char *linkage_name; | |
9601 | ||
9602 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9603 | if (linkage_name == NULL) | |
9604 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9605 | ||
9606 | return linkage_name; | |
9607 | } | |
9608 | ||
94af9270 | 9609 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9610 | compute the physname for the object, which include a method's: |
9c37b5ae | 9611 | - formal parameters (C++), |
a766d390 | 9612 | - receiver type (Go), |
a766d390 DE |
9613 | |
9614 | The term "physname" is a bit confusing. | |
9615 | For C++, for example, it is the demangled name. | |
9616 | For Go, for example, it's the mangled name. | |
94af9270 | 9617 | |
af6b7be1 JB |
9618 | For Ada, return the DIE's linkage name rather than the fully qualified |
9619 | name. PHYSNAME is ignored.. | |
9620 | ||
94af9270 KS |
9621 | The result is allocated on the objfile_obstack and canonicalized. */ |
9622 | ||
9623 | static const char * | |
15d034d0 TT |
9624 | dwarf2_compute_name (const char *name, |
9625 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9626 | int physname) |
9627 | { | |
bb5ed363 DE |
9628 | struct objfile *objfile = cu->objfile; |
9629 | ||
94af9270 KS |
9630 | if (name == NULL) |
9631 | name = dwarf2_name (die, cu); | |
9632 | ||
2ee7123e DE |
9633 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
9634 | but otherwise compute it by typename_concat inside GDB. | |
9635 | FIXME: Actually this is not really true, or at least not always true. | |
9636 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
9637 | Fortran names because there is no mangling standard. So new_symbol_full | |
9638 | will set the demangled name to the result of dwarf2_full_name, and it is | |
9639 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
9640 | if (cu->language == language_ada |
9641 | || (cu->language == language_fortran && physname)) | |
9642 | { | |
9643 | /* For Ada unit, we prefer the linkage name over the name, as | |
9644 | the former contains the exported name, which the user expects | |
9645 | to be able to reference. Ideally, we want the user to be able | |
9646 | to reference this entity using either natural or linkage name, | |
9647 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 9648 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 9649 | |
2ee7123e DE |
9650 | if (linkage_name != NULL) |
9651 | return linkage_name; | |
f55ee35c JK |
9652 | } |
9653 | ||
94af9270 KS |
9654 | /* These are the only languages we know how to qualify names in. */ |
9655 | if (name != NULL | |
9c37b5ae | 9656 | && (cu->language == language_cplus |
c44af4eb TT |
9657 | || cu->language == language_fortran || cu->language == language_d |
9658 | || cu->language == language_rust)) | |
94af9270 KS |
9659 | { |
9660 | if (die_needs_namespace (die, cu)) | |
9661 | { | |
0d5cff50 | 9662 | const char *prefix; |
34a68019 | 9663 | const char *canonical_name = NULL; |
94af9270 | 9664 | |
d7e74731 PA |
9665 | string_file buf; |
9666 | ||
94af9270 | 9667 | prefix = determine_prefix (die, cu); |
94af9270 KS |
9668 | if (*prefix != '\0') |
9669 | { | |
f55ee35c JK |
9670 | char *prefixed_name = typename_concat (NULL, prefix, name, |
9671 | physname, cu); | |
9a619af0 | 9672 | |
d7e74731 | 9673 | buf.puts (prefixed_name); |
94af9270 KS |
9674 | xfree (prefixed_name); |
9675 | } | |
9676 | else | |
d7e74731 | 9677 | buf.puts (name); |
94af9270 | 9678 | |
98bfdba5 PA |
9679 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
9680 | as children with DW_TAG_template_type_param or | |
9681 | DW_TAG_value_type_param. If the latter, add them to the name | |
9682 | here. If the name already has template parameters, then | |
9683 | skip this step; some versions of GCC emit both, and | |
9684 | it is more efficient to use the pre-computed name. | |
9685 | ||
9686 | Something to keep in mind about this process: it is very | |
9687 | unlikely, or in some cases downright impossible, to produce | |
9688 | something that will match the mangled name of a function. | |
9689 | If the definition of the function has the same debug info, | |
9690 | we should be able to match up with it anyway. But fallbacks | |
9691 | using the minimal symbol, for instance to find a method | |
9692 | implemented in a stripped copy of libstdc++, will not work. | |
9693 | If we do not have debug info for the definition, we will have to | |
9694 | match them up some other way. | |
9695 | ||
9696 | When we do name matching there is a related problem with function | |
9697 | templates; two instantiated function templates are allowed to | |
9698 | differ only by their return types, which we do not add here. */ | |
9699 | ||
9700 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
9701 | { | |
9702 | struct attribute *attr; | |
9703 | struct die_info *child; | |
9704 | int first = 1; | |
9705 | ||
9706 | die->building_fullname = 1; | |
9707 | ||
9708 | for (child = die->child; child != NULL; child = child->sibling) | |
9709 | { | |
9710 | struct type *type; | |
12df843f | 9711 | LONGEST value; |
d521ce57 | 9712 | const gdb_byte *bytes; |
98bfdba5 PA |
9713 | struct dwarf2_locexpr_baton *baton; |
9714 | struct value *v; | |
9715 | ||
9716 | if (child->tag != DW_TAG_template_type_param | |
9717 | && child->tag != DW_TAG_template_value_param) | |
9718 | continue; | |
9719 | ||
9720 | if (first) | |
9721 | { | |
d7e74731 | 9722 | buf.puts ("<"); |
98bfdba5 PA |
9723 | first = 0; |
9724 | } | |
9725 | else | |
d7e74731 | 9726 | buf.puts (", "); |
98bfdba5 PA |
9727 | |
9728 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
9729 | if (attr == NULL) | |
9730 | { | |
9731 | complaint (&symfile_complaints, | |
9732 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 9733 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
9734 | continue; |
9735 | } | |
9736 | type = die_type (child, cu); | |
9737 | ||
9738 | if (child->tag == DW_TAG_template_type_param) | |
9739 | { | |
d7e74731 | 9740 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
9741 | continue; |
9742 | } | |
9743 | ||
9744 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
9745 | if (attr == NULL) | |
9746 | { | |
9747 | complaint (&symfile_complaints, | |
3e43a32a MS |
9748 | _("template parameter missing " |
9749 | "DW_AT_const_value")); | |
d7e74731 | 9750 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
9751 | continue; |
9752 | } | |
9753 | ||
9754 | dwarf2_const_value_attr (attr, type, name, | |
9755 | &cu->comp_unit_obstack, cu, | |
9756 | &value, &bytes, &baton); | |
9757 | ||
9758 | if (TYPE_NOSIGN (type)) | |
9759 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
9760 | changed, this can use value_print instead. */ | |
d7e74731 | 9761 | c_printchar (value, type, &buf); |
98bfdba5 PA |
9762 | else |
9763 | { | |
9764 | struct value_print_options opts; | |
9765 | ||
9766 | if (baton != NULL) | |
9767 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
9768 | baton->data, | |
9769 | baton->size, | |
9770 | baton->per_cu); | |
9771 | else if (bytes != NULL) | |
9772 | { | |
9773 | v = allocate_value (type); | |
9774 | memcpy (value_contents_writeable (v), bytes, | |
9775 | TYPE_LENGTH (type)); | |
9776 | } | |
9777 | else | |
9778 | v = value_from_longest (type, value); | |
9779 | ||
3e43a32a MS |
9780 | /* Specify decimal so that we do not depend on |
9781 | the radix. */ | |
98bfdba5 PA |
9782 | get_formatted_print_options (&opts, 'd'); |
9783 | opts.raw = 1; | |
d7e74731 | 9784 | value_print (v, &buf, &opts); |
98bfdba5 PA |
9785 | release_value (v); |
9786 | value_free (v); | |
9787 | } | |
9788 | } | |
9789 | ||
9790 | die->building_fullname = 0; | |
9791 | ||
9792 | if (!first) | |
9793 | { | |
9794 | /* Close the argument list, with a space if necessary | |
9795 | (nested templates). */ | |
d7e74731 PA |
9796 | if (!buf.empty () && buf.string ().back () == '>') |
9797 | buf.puts (" >"); | |
98bfdba5 | 9798 | else |
d7e74731 | 9799 | buf.puts (">"); |
98bfdba5 PA |
9800 | } |
9801 | } | |
9802 | ||
9c37b5ae | 9803 | /* For C++ methods, append formal parameter type |
94af9270 | 9804 | information, if PHYSNAME. */ |
6e70227d | 9805 | |
94af9270 | 9806 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 9807 | && cu->language == language_cplus) |
94af9270 KS |
9808 | { |
9809 | struct type *type = read_type_die (die, cu); | |
9810 | ||
d7e74731 | 9811 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 9812 | &type_print_raw_options); |
94af9270 | 9813 | |
9c37b5ae | 9814 | if (cu->language == language_cplus) |
94af9270 | 9815 | { |
60430eff DJ |
9816 | /* Assume that an artificial first parameter is |
9817 | "this", but do not crash if it is not. RealView | |
9818 | marks unnamed (and thus unused) parameters as | |
9819 | artificial; there is no way to differentiate | |
9820 | the two cases. */ | |
94af9270 KS |
9821 | if (TYPE_NFIELDS (type) > 0 |
9822 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 9823 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
9824 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
9825 | 0)))) | |
d7e74731 | 9826 | buf.puts (" const"); |
94af9270 KS |
9827 | } |
9828 | } | |
9829 | ||
d7e74731 | 9830 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
9831 | |
9832 | if (cu->language == language_cplus) | |
34a68019 | 9833 | canonical_name |
322a8516 | 9834 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
9835 | &objfile->per_bfd->storage_obstack); |
9836 | ||
9837 | /* If we only computed INTERMEDIATE_NAME, or if | |
9838 | INTERMEDIATE_NAME is already canonical, then we need to | |
9839 | copy it to the appropriate obstack. */ | |
322a8516 | 9840 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
9841 | name = ((const char *) |
9842 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
9843 | intermediate_name.c_str (), |
9844 | intermediate_name.length ())); | |
34a68019 TT |
9845 | else |
9846 | name = canonical_name; | |
94af9270 KS |
9847 | } |
9848 | } | |
9849 | ||
9850 | return name; | |
9851 | } | |
9852 | ||
0114d602 DJ |
9853 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9854 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9855 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9856 | not have a name. NAME may either be from a previous call to |
9857 | dwarf2_name or NULL. | |
9858 | ||
9c37b5ae | 9859 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9860 | |
9861 | static const char * | |
15d034d0 | 9862 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 9863 | { |
94af9270 KS |
9864 | return dwarf2_compute_name (name, die, cu, 0); |
9865 | } | |
0114d602 | 9866 | |
94af9270 KS |
9867 | /* Construct a physname for the given DIE in CU. NAME may either be |
9868 | from a previous call to dwarf2_name or NULL. The result will be | |
9869 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9870 | name. | |
0114d602 | 9871 | |
9c37b5ae | 9872 | The output string will be canonicalized (if C++). */ |
0114d602 | 9873 | |
94af9270 | 9874 | static const char * |
15d034d0 | 9875 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9876 | { |
bb5ed363 | 9877 | struct objfile *objfile = cu->objfile; |
900e11f9 | 9878 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
9879 | int need_copy = 1; |
9880 | ||
9881 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9882 | on its own. */ | |
9883 | if (!die_needs_namespace (die, cu)) | |
9884 | return dwarf2_compute_name (name, die, cu, 1); | |
9885 | ||
73b9be8b | 9886 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9887 | |
e98c9e7c TT |
9888 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9889 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9890 | if (cu->language == language_rust && mangled != NULL | |
9891 | && strchr (mangled, '{') != NULL) | |
9892 | mangled = NULL; | |
9893 | ||
900e11f9 JK |
9894 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9895 | has computed. */ | |
791afaa2 | 9896 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 9897 | if (mangled != NULL) |
900e11f9 | 9898 | { |
900e11f9 JK |
9899 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9900 | type. It is easier for GDB users to search for such functions as | |
9901 | `name(params)' than `long name(params)'. In such case the minimal | |
9902 | symbol names do not match the full symbol names but for template | |
9903 | functions there is never a need to look up their definition from their | |
9904 | declaration so the only disadvantage remains the minimal symbol | |
9905 | variant `long name(params)' does not have the proper inferior type. | |
9906 | */ | |
9907 | ||
a766d390 DE |
9908 | if (cu->language == language_go) |
9909 | { | |
9910 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9911 | new_symbol_full assumes we return the mangled name. | |
9912 | This just undoes that lie until things are cleaned up. */ | |
a766d390 DE |
9913 | } |
9914 | else | |
9915 | { | |
791afaa2 TT |
9916 | demangled.reset (gdb_demangle (mangled, |
9917 | (DMGL_PARAMS | DMGL_ANSI | |
9918 | | DMGL_RET_DROP))); | |
a766d390 | 9919 | } |
900e11f9 | 9920 | if (demangled) |
791afaa2 | 9921 | canon = demangled.get (); |
900e11f9 JK |
9922 | else |
9923 | { | |
9924 | canon = mangled; | |
9925 | need_copy = 0; | |
9926 | } | |
9927 | } | |
9928 | ||
9929 | if (canon == NULL || check_physname) | |
9930 | { | |
9931 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9932 | ||
9933 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9934 | { | |
9935 | /* It may not mean a bug in GDB. The compiler could also | |
9936 | compute DW_AT_linkage_name incorrectly. But in such case | |
9937 | GDB would need to be bug-to-bug compatible. */ | |
9938 | ||
9939 | complaint (&symfile_complaints, | |
9940 | _("Computed physname <%s> does not match demangled <%s> " | |
9941 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9942 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9943 | objfile_name (objfile)); |
900e11f9 JK |
9944 | |
9945 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9946 | is available here - over computed PHYSNAME. It is safer | |
9947 | against both buggy GDB and buggy compilers. */ | |
9948 | ||
9949 | retval = canon; | |
9950 | } | |
9951 | else | |
9952 | { | |
9953 | retval = physname; | |
9954 | need_copy = 0; | |
9955 | } | |
9956 | } | |
9957 | else | |
9958 | retval = canon; | |
9959 | ||
9960 | if (need_copy) | |
224c3ddb SM |
9961 | retval = ((const char *) |
9962 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9963 | retval, strlen (retval))); | |
900e11f9 | 9964 | |
900e11f9 | 9965 | return retval; |
0114d602 DJ |
9966 | } |
9967 | ||
74921315 KS |
9968 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9969 | a new symbol for it. | |
9970 | ||
9971 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9972 | ||
9973 | static int | |
9974 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9975 | { | |
9976 | struct attribute *attr; | |
9977 | ||
9978 | /* If the die does not have a name, this is not a namespace | |
9979 | alias. */ | |
9980 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9981 | if (attr != NULL) | |
9982 | { | |
9983 | int num; | |
9984 | struct die_info *d = die; | |
9985 | struct dwarf2_cu *imported_cu = cu; | |
9986 | ||
9987 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9988 | keep inspecting DIEs until we hit the underlying import. */ | |
9989 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9990 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9991 | { | |
9992 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
9993 | if (attr == NULL) | |
9994 | break; | |
9995 | ||
9996 | d = follow_die_ref (d, attr, &imported_cu); | |
9997 | if (d->tag != DW_TAG_imported_declaration) | |
9998 | break; | |
9999 | } | |
10000 | ||
10001 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10002 | { | |
10003 | complaint (&symfile_complaints, | |
10004 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 10005 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
10006 | return 0; |
10007 | } | |
10008 | ||
10009 | if (attr != NULL) | |
10010 | { | |
10011 | struct type *type; | |
9c541725 | 10012 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 10013 | |
9c541725 | 10014 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
10015 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
10016 | { | |
10017 | /* This declaration is a global namespace alias. Add | |
10018 | a symbol for it whose type is the aliased namespace. */ | |
10019 | new_symbol (die, type, cu); | |
10020 | return 1; | |
10021 | } | |
10022 | } | |
10023 | } | |
10024 | ||
10025 | return 0; | |
10026 | } | |
10027 | ||
22cee43f PMR |
10028 | /* Return the using directives repository (global or local?) to use in the |
10029 | current context for LANGUAGE. | |
10030 | ||
10031 | For Ada, imported declarations can materialize renamings, which *may* be | |
10032 | global. However it is impossible (for now?) in DWARF to distinguish | |
10033 | "external" imported declarations and "static" ones. As all imported | |
10034 | declarations seem to be static in all other languages, make them all CU-wide | |
10035 | global only in Ada. */ | |
10036 | ||
10037 | static struct using_direct ** | |
10038 | using_directives (enum language language) | |
10039 | { | |
10040 | if (language == language_ada && context_stack_depth == 0) | |
10041 | return &global_using_directives; | |
10042 | else | |
10043 | return &local_using_directives; | |
10044 | } | |
10045 | ||
27aa8d6a SW |
10046 | /* Read the import statement specified by the given die and record it. */ |
10047 | ||
10048 | static void | |
10049 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10050 | { | |
bb5ed363 | 10051 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 10052 | struct attribute *import_attr; |
32019081 | 10053 | struct die_info *imported_die, *child_die; |
de4affc9 | 10054 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10055 | const char *imported_name; |
794684b6 | 10056 | const char *imported_name_prefix; |
13387711 SW |
10057 | const char *canonical_name; |
10058 | const char *import_alias; | |
10059 | const char *imported_declaration = NULL; | |
794684b6 | 10060 | const char *import_prefix; |
eb1e02fd | 10061 | std::vector<const char *> excludes; |
13387711 | 10062 | |
27aa8d6a SW |
10063 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10064 | if (import_attr == NULL) | |
10065 | { | |
10066 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
10067 | dwarf_tag_name (die->tag)); | |
10068 | return; | |
10069 | } | |
10070 | ||
de4affc9 CC |
10071 | imported_cu = cu; |
10072 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10073 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10074 | if (imported_name == NULL) |
10075 | { | |
10076 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10077 | ||
10078 | The import in the following code: | |
10079 | namespace A | |
10080 | { | |
10081 | typedef int B; | |
10082 | } | |
10083 | ||
10084 | int main () | |
10085 | { | |
10086 | using A::B; | |
10087 | B b; | |
10088 | return b; | |
10089 | } | |
10090 | ||
10091 | ... | |
10092 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10093 | <52> DW_AT_decl_file : 1 | |
10094 | <53> DW_AT_decl_line : 6 | |
10095 | <54> DW_AT_import : <0x75> | |
10096 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10097 | <59> DW_AT_name : B | |
10098 | <5b> DW_AT_decl_file : 1 | |
10099 | <5c> DW_AT_decl_line : 2 | |
10100 | <5d> DW_AT_type : <0x6e> | |
10101 | ... | |
10102 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10103 | <76> DW_AT_byte_size : 4 | |
10104 | <77> DW_AT_encoding : 5 (signed) | |
10105 | ||
10106 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10107 | This case will be ignored until the gcc bug is fixed. */ | |
10108 | return; | |
10109 | } | |
10110 | ||
82856980 SW |
10111 | /* Figure out the local name after import. */ |
10112 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10113 | |
794684b6 SW |
10114 | /* Figure out where the statement is being imported to. */ |
10115 | import_prefix = determine_prefix (die, cu); | |
10116 | ||
10117 | /* Figure out what the scope of the imported die is and prepend it | |
10118 | to the name of the imported die. */ | |
de4affc9 | 10119 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10120 | |
f55ee35c JK |
10121 | if (imported_die->tag != DW_TAG_namespace |
10122 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10123 | { |
13387711 SW |
10124 | imported_declaration = imported_name; |
10125 | canonical_name = imported_name_prefix; | |
794684b6 | 10126 | } |
13387711 | 10127 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10128 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10129 | imported_name_prefix, |
10130 | (cu->language == language_d ? "." : "::"), | |
10131 | imported_name, (char *) NULL); | |
13387711 SW |
10132 | else |
10133 | canonical_name = imported_name; | |
794684b6 | 10134 | |
32019081 JK |
10135 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10136 | for (child_die = die->child; child_die && child_die->tag; | |
10137 | child_die = sibling_die (child_die)) | |
10138 | { | |
10139 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10140 | represented by an imported module entry with an import attribute | |
10141 | referring to the module and owned entries corresponding to those | |
10142 | entities that are renamed as part of being imported. */ | |
10143 | ||
10144 | if (child_die->tag != DW_TAG_imported_declaration) | |
10145 | { | |
10146 | complaint (&symfile_complaints, | |
10147 | _("child DW_TAG_imported_declaration expected " | |
10148 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 10149 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
10150 | continue; |
10151 | } | |
10152 | ||
10153 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10154 | if (import_attr == NULL) | |
10155 | { | |
10156 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
10157 | dwarf_tag_name (child_die->tag)); | |
10158 | continue; | |
10159 | } | |
10160 | ||
10161 | imported_cu = cu; | |
10162 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10163 | &imported_cu); | |
10164 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10165 | if (imported_name == NULL) | |
10166 | { | |
10167 | complaint (&symfile_complaints, | |
10168 | _("child DW_TAG_imported_declaration has unknown " | |
10169 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 10170 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
10171 | continue; |
10172 | } | |
10173 | ||
eb1e02fd | 10174 | excludes.push_back (imported_name); |
32019081 JK |
10175 | |
10176 | process_die (child_die, cu); | |
10177 | } | |
10178 | ||
22cee43f PMR |
10179 | add_using_directive (using_directives (cu->language), |
10180 | import_prefix, | |
10181 | canonical_name, | |
10182 | import_alias, | |
10183 | imported_declaration, | |
10184 | excludes, | |
10185 | 0, | |
10186 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10187 | } |
10188 | ||
5230b05a WT |
10189 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10190 | types, but gives them a size of zero. Starting with version 14, | |
10191 | ICC is compatible with GCC. */ | |
10192 | ||
10193 | static int | |
10194 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
10195 | { | |
10196 | if (!cu->checked_producer) | |
10197 | check_producer (cu); | |
10198 | ||
10199 | return cu->producer_is_icc_lt_14; | |
10200 | } | |
10201 | ||
1b80a9fa JK |
10202 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10203 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10204 | this, it was first present in GCC release 4.3.0. */ | |
10205 | ||
10206 | static int | |
10207 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
10208 | { | |
10209 | if (!cu->checked_producer) | |
10210 | check_producer (cu); | |
10211 | ||
10212 | return cu->producer_is_gcc_lt_4_3; | |
10213 | } | |
10214 | ||
d721ba37 PA |
10215 | static file_and_directory |
10216 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10217 | { |
d721ba37 PA |
10218 | file_and_directory res; |
10219 | ||
9291a0cd TT |
10220 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10221 | is not a source language identifier. */ | |
d721ba37 PA |
10222 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10223 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10224 | |
d721ba37 PA |
10225 | if (res.comp_dir == NULL |
10226 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10227 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10228 | { |
d721ba37 PA |
10229 | res.comp_dir_storage = ldirname (res.name); |
10230 | if (!res.comp_dir_storage.empty ()) | |
10231 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10232 | } |
d721ba37 | 10233 | if (res.comp_dir != NULL) |
9291a0cd TT |
10234 | { |
10235 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10236 | directory, get rid of it. */ | |
d721ba37 | 10237 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10238 | |
d721ba37 PA |
10239 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10240 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10241 | } |
10242 | ||
d721ba37 PA |
10243 | if (res.name == NULL) |
10244 | res.name = "<unknown>"; | |
10245 | ||
10246 | return res; | |
9291a0cd TT |
10247 | } |
10248 | ||
f4dc4d17 DE |
10249 | /* Handle DW_AT_stmt_list for a compilation unit. |
10250 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10251 | COMP_DIR is the compilation directory. LOWPC is passed to |
10252 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10253 | |
10254 | static void | |
10255 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10256 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10257 | { |
527f3840 | 10258 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 10259 | struct attribute *attr; |
527f3840 JK |
10260 | struct line_header line_header_local; |
10261 | hashval_t line_header_local_hash; | |
527f3840 JK |
10262 | void **slot; |
10263 | int decode_mapping; | |
2ab95328 | 10264 | |
f4dc4d17 DE |
10265 | gdb_assert (! cu->per_cu->is_debug_types); |
10266 | ||
2ab95328 | 10267 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
10268 | if (attr == NULL) |
10269 | return; | |
10270 | ||
9c541725 | 10271 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10272 | |
10273 | /* The line header hash table is only created if needed (it exists to | |
10274 | prevent redundant reading of the line table for partial_units). | |
10275 | If we're given a partial_unit, we'll need it. If we're given a | |
10276 | compile_unit, then use the line header hash table if it's already | |
10277 | created, but don't create one just yet. */ | |
10278 | ||
10279 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10280 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10281 | { |
527f3840 JK |
10282 | dwarf2_per_objfile->line_header_hash |
10283 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
10284 | line_header_eq_voidp, | |
10285 | free_line_header_voidp, | |
10286 | &objfile->objfile_obstack, | |
10287 | hashtab_obstack_allocate, | |
10288 | dummy_obstack_deallocate); | |
10289 | } | |
2ab95328 | 10290 | |
9c541725 | 10291 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10292 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10293 | line_header_local_hash = line_header_hash (&line_header_local); | |
10294 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10295 | { | |
10296 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10297 | &line_header_local, | |
10298 | line_header_local_hash, NO_INSERT); | |
10299 | ||
10300 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10301 | is not present in *SLOT (since if there is something in *SLOT then | |
10302 | it will be for a partial_unit). */ | |
10303 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10304 | { |
527f3840 | 10305 | gdb_assert (*slot != NULL); |
9a3c8263 | 10306 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10307 | return; |
dee91e82 | 10308 | } |
2ab95328 | 10309 | } |
527f3840 JK |
10310 | |
10311 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10312 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10313 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10314 | if (lh == NULL) | |
527f3840 | 10315 | return; |
4c8aa72d PA |
10316 | |
10317 | cu->line_header = lh.release (); | |
10318 | cu->line_header_die_owner = die; | |
527f3840 JK |
10319 | |
10320 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10321 | slot = NULL; | |
10322 | else | |
10323 | { | |
10324 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10325 | &line_header_local, | |
10326 | line_header_local_hash, INSERT); | |
10327 | gdb_assert (slot != NULL); | |
10328 | } | |
10329 | if (slot != NULL && *slot == NULL) | |
10330 | { | |
10331 | /* This newly decoded line number information unit will be owned | |
10332 | by line_header_hash hash table. */ | |
10333 | *slot = cu->line_header; | |
4c8aa72d | 10334 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10335 | } |
10336 | else | |
10337 | { | |
10338 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10339 | may be already used by multiple CUs. Create only temporary decoded | |
10340 | line_header for this CU - it may happen at most once for each line | |
10341 | number information unit. And if we're not using line_header_hash | |
10342 | then this is what we want as well. */ | |
10343 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10344 | } |
10345 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10346 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10347 | decode_mapping); | |
fff8551c | 10348 | |
2ab95328 TT |
10349 | } |
10350 | ||
95554aad | 10351 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10352 | |
c906108c | 10353 | static void |
e7c27a73 | 10354 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10355 | { |
dee91e82 | 10356 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10357 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10358 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10359 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10360 | struct attribute *attr; | |
c906108c | 10361 | struct die_info *child_die; |
e142c38c | 10362 | CORE_ADDR baseaddr; |
6e70227d | 10363 | |
e142c38c | 10364 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 10365 | |
fae299cd | 10366 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10367 | |
10368 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10369 | from finish_block. */ | |
2acceee2 | 10370 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10371 | lowpc = highpc; |
3e29f34a | 10372 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10373 | |
d721ba37 | 10374 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10375 | |
95554aad | 10376 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 10377 | |
f4b8a18d KW |
10378 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10379 | standardised yet. As a workaround for the language detection we fall | |
10380 | back to the DW_AT_producer string. */ | |
10381 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10382 | cu->language = language_opencl; | |
10383 | ||
3019eac3 DE |
10384 | /* Similar hack for Go. */ |
10385 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10386 | set_cu_language (DW_LANG_Go, cu); | |
10387 | ||
d721ba37 | 10388 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10389 | |
10390 | /* Decode line number information if present. We do this before | |
10391 | processing child DIEs, so that the line header table is available | |
10392 | for DW_AT_decl_file. */ | |
d721ba37 | 10393 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10394 | |
10395 | /* Process all dies in compilation unit. */ | |
10396 | if (die->child != NULL) | |
10397 | { | |
10398 | child_die = die->child; | |
10399 | while (child_die && child_die->tag) | |
10400 | { | |
10401 | process_die (child_die, cu); | |
10402 | child_die = sibling_die (child_die); | |
10403 | } | |
10404 | } | |
10405 | ||
10406 | /* Decode macro information, if present. Dwarf 2 macro information | |
10407 | refers to information in the line number info statement program | |
10408 | header, so we can only read it if we've read the header | |
10409 | successfully. */ | |
0af92d60 JK |
10410 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10411 | if (attr == NULL) | |
10412 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10413 | if (attr && cu->line_header) |
10414 | { | |
10415 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
10416 | complaint (&symfile_complaints, | |
0af92d60 | 10417 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10418 | |
43f3e411 | 10419 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10420 | } |
10421 | else | |
10422 | { | |
10423 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10424 | if (attr && cu->line_header) | |
10425 | { | |
10426 | unsigned int macro_offset = DW_UNSND (attr); | |
10427 | ||
43f3e411 | 10428 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10429 | } |
10430 | } | |
3019eac3 DE |
10431 | } |
10432 | ||
f4dc4d17 DE |
10433 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
10434 | Create the set of symtabs used by this TU, or if this TU is sharing | |
10435 | symtabs with another TU and the symtabs have already been created | |
10436 | then restore those symtabs in the line header. | |
10437 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
10438 | |
10439 | static void | |
f4dc4d17 | 10440 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 10441 | { |
f4dc4d17 DE |
10442 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
10443 | struct type_unit_group *tu_group; | |
10444 | int first_time; | |
3019eac3 | 10445 | struct attribute *attr; |
9c541725 | 10446 | unsigned int i; |
0186c6a7 | 10447 | struct signatured_type *sig_type; |
3019eac3 | 10448 | |
f4dc4d17 | 10449 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10450 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10451 | |
f4dc4d17 | 10452 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 10453 | |
f4dc4d17 | 10454 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10455 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
10456 | if (sig_type->type_unit_group == NULL) |
10457 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
10458 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
10459 | |
10460 | /* If we've already processed this stmt_list there's no real need to | |
10461 | do it again, we could fake it and just recreate the part we need | |
10462 | (file name,index -> symtab mapping). If data shows this optimization | |
10463 | is useful we can do it then. */ | |
43f3e411 | 10464 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10465 | |
10466 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10467 | debug info. */ | |
fff8551c | 10468 | line_header_up lh; |
f4dc4d17 | 10469 | if (attr != NULL) |
3019eac3 | 10470 | { |
9c541725 | 10471 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
10472 | lh = dwarf_decode_line_header (line_offset, cu); |
10473 | } | |
10474 | if (lh == NULL) | |
10475 | { | |
10476 | if (first_time) | |
10477 | dwarf2_start_symtab (cu, "", NULL, 0); | |
10478 | else | |
10479 | { | |
10480 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 10481 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10482 | } |
f4dc4d17 | 10483 | return; |
3019eac3 DE |
10484 | } |
10485 | ||
4c8aa72d PA |
10486 | cu->line_header = lh.release (); |
10487 | cu->line_header_die_owner = die; | |
3019eac3 | 10488 | |
f4dc4d17 DE |
10489 | if (first_time) |
10490 | { | |
43f3e411 | 10491 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 10492 | |
1fd60fc0 DE |
10493 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10494 | still initializing it, and our caller (a few levels up) | |
10495 | process_full_type_unit still needs to know if this is the first | |
10496 | time. */ | |
10497 | ||
4c8aa72d PA |
10498 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
10499 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
10500 | cu->line_header->file_names.size ()); | |
3019eac3 | 10501 | |
4c8aa72d | 10502 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10503 | { |
4c8aa72d | 10504 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 10505 | |
4c8aa72d | 10506 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 10507 | |
f4dc4d17 DE |
10508 | if (current_subfile->symtab == NULL) |
10509 | { | |
4c8aa72d PA |
10510 | /* NOTE: start_subfile will recognize when it's been |
10511 | passed a file it has already seen. So we can't | |
10512 | assume there's a simple mapping from | |
10513 | cu->line_header->file_names to subfiles, plus | |
10514 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
10515 | current_subfile->symtab |
10516 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
10517 | } |
10518 | ||
8c43009f PA |
10519 | fe.symtab = current_subfile->symtab; |
10520 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
10521 | } |
10522 | } | |
10523 | else | |
3019eac3 | 10524 | { |
0ab9ce85 | 10525 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10526 | |
4c8aa72d | 10527 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10528 | { |
4c8aa72d | 10529 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 10530 | |
4c8aa72d | 10531 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10532 | } |
3019eac3 DE |
10533 | } |
10534 | ||
f4dc4d17 DE |
10535 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10536 | so they don't have a "real" (so to speak) symtab anyway. | |
10537 | There is later code that will assign the main symtab to all symbols | |
10538 | that don't have one. We need to handle the case of a symbol with a | |
10539 | missing symtab (DW_AT_decl_file) anyway. */ | |
10540 | } | |
3019eac3 | 10541 | |
f4dc4d17 DE |
10542 | /* Process DW_TAG_type_unit. |
10543 | For TUs we want to skip the first top level sibling if it's not the | |
10544 | actual type being defined by this TU. In this case the first top | |
10545 | level sibling is there to provide context only. */ | |
3019eac3 | 10546 | |
f4dc4d17 DE |
10547 | static void |
10548 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10549 | { | |
10550 | struct die_info *child_die; | |
3019eac3 | 10551 | |
f4dc4d17 DE |
10552 | prepare_one_comp_unit (cu, die, language_minimal); |
10553 | ||
10554 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10555 | We do this before processing child DIEs, so that the line header table | |
10556 | is available for DW_AT_decl_file. */ | |
10557 | setup_type_unit_groups (die, cu); | |
10558 | ||
10559 | if (die->child != NULL) | |
10560 | { | |
10561 | child_die = die->child; | |
10562 | while (child_die && child_die->tag) | |
10563 | { | |
10564 | process_die (child_die, cu); | |
10565 | child_die = sibling_die (child_die); | |
10566 | } | |
10567 | } | |
3019eac3 DE |
10568 | } |
10569 | \f | |
80626a55 DE |
10570 | /* DWO/DWP files. |
10571 | ||
10572 | http://gcc.gnu.org/wiki/DebugFission | |
10573 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10574 | ||
10575 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10576 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10577 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10578 | |
10579 | static hashval_t | |
10580 | hash_dwo_file (const void *item) | |
10581 | { | |
9a3c8263 | 10582 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10583 | hashval_t hash; |
3019eac3 | 10584 | |
a2ce51a0 DE |
10585 | hash = htab_hash_string (dwo_file->dwo_name); |
10586 | if (dwo_file->comp_dir != NULL) | |
10587 | hash += htab_hash_string (dwo_file->comp_dir); | |
10588 | return hash; | |
3019eac3 DE |
10589 | } |
10590 | ||
10591 | static int | |
10592 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10593 | { | |
9a3c8263 SM |
10594 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10595 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10596 | |
a2ce51a0 DE |
10597 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10598 | return 0; | |
10599 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10600 | return lhs->comp_dir == rhs->comp_dir; | |
10601 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10602 | } |
10603 | ||
10604 | /* Allocate a hash table for DWO files. */ | |
10605 | ||
10606 | static htab_t | |
10607 | allocate_dwo_file_hash_table (void) | |
10608 | { | |
10609 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10610 | ||
10611 | return htab_create_alloc_ex (41, | |
10612 | hash_dwo_file, | |
10613 | eq_dwo_file, | |
10614 | NULL, | |
10615 | &objfile->objfile_obstack, | |
10616 | hashtab_obstack_allocate, | |
10617 | dummy_obstack_deallocate); | |
10618 | } | |
10619 | ||
80626a55 DE |
10620 | /* Lookup DWO file DWO_NAME. */ |
10621 | ||
10622 | static void ** | |
0ac5b59e | 10623 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
10624 | { |
10625 | struct dwo_file find_entry; | |
10626 | void **slot; | |
10627 | ||
10628 | if (dwarf2_per_objfile->dwo_files == NULL) | |
10629 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
10630 | ||
10631 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
10632 | find_entry.dwo_name = dwo_name; |
10633 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
10634 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
10635 | ||
10636 | return slot; | |
10637 | } | |
10638 | ||
3019eac3 DE |
10639 | static hashval_t |
10640 | hash_dwo_unit (const void *item) | |
10641 | { | |
9a3c8263 | 10642 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
10643 | |
10644 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
10645 | return dwo_unit->signature; | |
10646 | } | |
10647 | ||
10648 | static int | |
10649 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
10650 | { | |
9a3c8263 SM |
10651 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
10652 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
10653 | |
10654 | /* The signature is assumed to be unique within the DWO file. | |
10655 | So while object file CU dwo_id's always have the value zero, | |
10656 | that's OK, assuming each object file DWO file has only one CU, | |
10657 | and that's the rule for now. */ | |
10658 | return lhs->signature == rhs->signature; | |
10659 | } | |
10660 | ||
10661 | /* Allocate a hash table for DWO CUs,TUs. | |
10662 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
10663 | ||
10664 | static htab_t | |
10665 | allocate_dwo_unit_table (struct objfile *objfile) | |
10666 | { | |
10667 | /* Start out with a pretty small number. | |
10668 | Generally DWO files contain only one CU and maybe some TUs. */ | |
10669 | return htab_create_alloc_ex (3, | |
10670 | hash_dwo_unit, | |
10671 | eq_dwo_unit, | |
10672 | NULL, | |
10673 | &objfile->objfile_obstack, | |
10674 | hashtab_obstack_allocate, | |
10675 | dummy_obstack_deallocate); | |
10676 | } | |
10677 | ||
80626a55 | 10678 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 10679 | |
19c3d4c9 | 10680 | struct create_dwo_cu_data |
3019eac3 DE |
10681 | { |
10682 | struct dwo_file *dwo_file; | |
19c3d4c9 | 10683 | struct dwo_unit dwo_unit; |
3019eac3 DE |
10684 | }; |
10685 | ||
19c3d4c9 | 10686 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
10687 | |
10688 | static void | |
19c3d4c9 DE |
10689 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
10690 | const gdb_byte *info_ptr, | |
10691 | struct die_info *comp_unit_die, | |
10692 | int has_children, | |
10693 | void *datap) | |
3019eac3 DE |
10694 | { |
10695 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 10696 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 10697 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 10698 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 10699 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 10700 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 10701 | struct attribute *attr; |
3019eac3 DE |
10702 | |
10703 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
10704 | if (attr == NULL) | |
10705 | { | |
19c3d4c9 DE |
10706 | complaint (&symfile_complaints, |
10707 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
10708 | " its dwo_id [in module %s]"), | |
9c541725 | 10709 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
10710 | return; |
10711 | } | |
10712 | ||
3019eac3 DE |
10713 | dwo_unit->dwo_file = dwo_file; |
10714 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 10715 | dwo_unit->section = section; |
9c541725 | 10716 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
10717 | dwo_unit->length = cu->per_cu->length; |
10718 | ||
b4f54984 | 10719 | if (dwarf_read_debug) |
4031ecc5 | 10720 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
10721 | to_underlying (sect_off), |
10722 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
10723 | } |
10724 | ||
33c5cd75 | 10725 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 10726 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 10727 | |
33c5cd75 DB |
10728 | static void |
10729 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
10730 | htab_t &cus_htab) | |
3019eac3 DE |
10731 | { |
10732 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 10733 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 10734 | |
33c5cd75 DB |
10735 | dwarf2_read_section (objfile, §ion); |
10736 | info_ptr = section.buffer; | |
3019eac3 DE |
10737 | |
10738 | if (info_ptr == NULL) | |
33c5cd75 | 10739 | return; |
3019eac3 | 10740 | |
b4f54984 | 10741 | if (dwarf_read_debug) |
19c3d4c9 DE |
10742 | { |
10743 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
10744 | get_section_name (§ion), |
10745 | get_section_file_name (§ion)); | |
19c3d4c9 | 10746 | } |
3019eac3 | 10747 | |
33c5cd75 | 10748 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
10749 | while (info_ptr < end_ptr) |
10750 | { | |
10751 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
10752 | struct create_dwo_cu_data create_dwo_cu_data; |
10753 | struct dwo_unit *dwo_unit; | |
10754 | void **slot; | |
10755 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 10756 | |
19c3d4c9 DE |
10757 | memset (&create_dwo_cu_data.dwo_unit, 0, |
10758 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
10759 | memset (&per_cu, 0, sizeof (per_cu)); |
10760 | per_cu.objfile = objfile; | |
10761 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
10762 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
10763 | per_cu.section = §ion; | |
c5ed0576 | 10764 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
10765 | |
10766 | init_cutu_and_read_dies_no_follow ( | |
10767 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
10768 | info_ptr += per_cu.length; | |
10769 | ||
10770 | // If the unit could not be parsed, skip it. | |
10771 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
10772 | continue; | |
3019eac3 | 10773 | |
33c5cd75 DB |
10774 | if (cus_htab == NULL) |
10775 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 10776 | |
33c5cd75 DB |
10777 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
10778 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
10779 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
10780 | gdb_assert (slot != NULL); | |
10781 | if (*slot != NULL) | |
19c3d4c9 | 10782 | { |
33c5cd75 DB |
10783 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
10784 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 10785 | |
33c5cd75 DB |
10786 | complaint (&symfile_complaints, |
10787 | _("debug cu entry at offset 0x%x is duplicate to" | |
10788 | " the entry at offset 0x%x, signature %s"), | |
10789 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
10790 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 10791 | } |
33c5cd75 | 10792 | *slot = (void *)dwo_unit; |
3019eac3 | 10793 | } |
3019eac3 DE |
10794 | } |
10795 | ||
80626a55 DE |
10796 | /* DWP file .debug_{cu,tu}_index section format: |
10797 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
10798 | ||
d2415c6c DE |
10799 | DWP Version 1: |
10800 | ||
80626a55 DE |
10801 | Both index sections have the same format, and serve to map a 64-bit |
10802 | signature to a set of section numbers. Each section begins with a header, | |
10803 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
10804 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
10805 | aligned at 8-byte boundaries in the file. | |
10806 | ||
d2415c6c DE |
10807 | The index section header consists of: |
10808 | ||
10809 | V, 32 bit version number | |
10810 | -, 32 bits unused | |
10811 | N, 32 bit number of compilation units or type units in the index | |
10812 | M, 32 bit number of slots in the hash table | |
80626a55 | 10813 | |
d2415c6c | 10814 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 10815 | |
d2415c6c DE |
10816 | The hash table begins at offset 16 in the section, and consists of an array |
10817 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
10818 | order of the application binary). Unused slots in the hash table are 0. | |
10819 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 10820 | |
d2415c6c DE |
10821 | The parallel table begins immediately after the hash table |
10822 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
10823 | array of 32-bit indexes (using the byte order of the application binary), | |
10824 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
10825 | table contains a 32-bit index into the pool of section numbers. For unused | |
10826 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 10827 | |
73869dc2 DE |
10828 | The pool of section numbers begins immediately following the hash table |
10829 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
10830 | section numbers consists of an array of 32-bit words (using the byte order | |
10831 | of the application binary). Each item in the array is indexed starting | |
10832 | from 0. The hash table entry provides the index of the first section | |
10833 | number in the set. Additional section numbers in the set follow, and the | |
10834 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
10835 | ||
10836 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10837 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10838 | be the second entry. Other members of the set may follow in any order. | |
10839 | ||
10840 | --- | |
10841 | ||
10842 | DWP Version 2: | |
10843 | ||
10844 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
10845 | and the entries in the index tables are now offsets into these sections. | |
10846 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10847 | section. | |
10848 | ||
10849 | Index Section Contents: | |
10850 | Header | |
10851 | Hash Table of Signatures dwp_hash_table.hash_table | |
10852 | Parallel Table of Indices dwp_hash_table.unit_table | |
10853 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
10854 | Table of Section Sizes dwp_hash_table.v2.sizes | |
10855 | ||
10856 | The index section header consists of: | |
10857 | ||
10858 | V, 32 bit version number | |
10859 | L, 32 bit number of columns in the table of section offsets | |
10860 | N, 32 bit number of compilation units or type units in the index | |
10861 | M, 32 bit number of slots in the hash table | |
10862 | ||
10863 | Numbers are recorded using the byte order of the application binary. | |
10864 | ||
10865 | The hash table has the same format as version 1. | |
10866 | The parallel table of indices has the same format as version 1, | |
10867 | except that the entries are origin-1 indices into the table of sections | |
10868 | offsets and the table of section sizes. | |
10869 | ||
10870 | The table of offsets begins immediately following the parallel table | |
10871 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10872 | a two-dimensional array of 32-bit words (using the byte order of the | |
10873 | application binary), with L columns and N+1 rows, in row-major order. | |
10874 | Each row in the array is indexed starting from 0. The first row provides | |
10875 | a key to the remaining rows: each column in this row provides an identifier | |
10876 | for a debug section, and the offsets in the same column of subsequent rows | |
10877 | refer to that section. The section identifiers are: | |
10878 | ||
10879 | DW_SECT_INFO 1 .debug_info.dwo | |
10880 | DW_SECT_TYPES 2 .debug_types.dwo | |
10881 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10882 | DW_SECT_LINE 4 .debug_line.dwo | |
10883 | DW_SECT_LOC 5 .debug_loc.dwo | |
10884 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10885 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10886 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10887 | ||
10888 | The offsets provided by the CU and TU index sections are the base offsets | |
10889 | for the contributions made by each CU or TU to the corresponding section | |
10890 | in the package file. Each CU and TU header contains an abbrev_offset | |
10891 | field, used to find the abbreviations table for that CU or TU within the | |
10892 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10893 | be interpreted as relative to the base offset given in the index section. | |
10894 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10895 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10896 | and offsets into other debug sections obtained from DWARF attributes should | |
10897 | also be interpreted as relative to the corresponding base offset. | |
10898 | ||
10899 | The table of sizes begins immediately following the table of offsets. | |
10900 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10901 | with L columns and N rows, in row-major order. Each row in the array is | |
10902 | indexed starting from 1 (row 0 is shared by the two tables). | |
10903 | ||
10904 | --- | |
10905 | ||
10906 | Hash table lookup is handled the same in version 1 and 2: | |
10907 | ||
10908 | We assume that N and M will not exceed 2^32 - 1. | |
10909 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10910 | ||
d2415c6c DE |
10911 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10912 | in the hash table is located as follows: | |
80626a55 | 10913 | |
d2415c6c DE |
10914 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10915 | the low-order k bits all set to 1. | |
80626a55 | 10916 | |
d2415c6c | 10917 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10918 | |
d2415c6c DE |
10919 | 3) If the hash table entry at index H matches the signature, use that |
10920 | entry. If the hash table entry at index H is unused (all zeroes), | |
10921 | terminate the search: the signature is not present in the table. | |
80626a55 | 10922 | |
d2415c6c | 10923 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10924 | |
d2415c6c | 10925 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10926 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10927 | |
10928 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10929 | .debug_{info,types}.dwo in DWP_FILE. | |
10930 | Returns NULL if there isn't one. | |
10931 | Note: This function processes DWP files only, not DWO files. */ | |
10932 | ||
10933 | static struct dwp_hash_table * | |
10934 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10935 | { | |
10936 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10937 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10938 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10939 | struct dwarf2_section_info *index; |
73869dc2 | 10940 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10941 | struct dwp_hash_table *htab; |
10942 | ||
10943 | if (is_debug_types) | |
10944 | index = &dwp_file->sections.tu_index; | |
10945 | else | |
10946 | index = &dwp_file->sections.cu_index; | |
10947 | ||
10948 | if (dwarf2_section_empty_p (index)) | |
10949 | return NULL; | |
10950 | dwarf2_read_section (objfile, index); | |
10951 | ||
10952 | index_ptr = index->buffer; | |
10953 | index_end = index_ptr + index->size; | |
10954 | ||
10955 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10956 | index_ptr += 4; |
10957 | if (version == 2) | |
10958 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10959 | else | |
10960 | nr_columns = 0; | |
10961 | index_ptr += 4; | |
80626a55 DE |
10962 | nr_units = read_4_bytes (dbfd, index_ptr); |
10963 | index_ptr += 4; | |
10964 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10965 | index_ptr += 4; | |
10966 | ||
73869dc2 | 10967 | if (version != 1 && version != 2) |
80626a55 | 10968 | { |
21aa081e | 10969 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10970 | " [in module %s]"), |
21aa081e | 10971 | pulongest (version), dwp_file->name); |
80626a55 DE |
10972 | } |
10973 | if (nr_slots != (nr_slots & -nr_slots)) | |
10974 | { | |
21aa081e | 10975 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10976 | " is not power of 2 [in module %s]"), |
21aa081e | 10977 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10978 | } |
10979 | ||
10980 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10981 | htab->version = version; |
10982 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10983 | htab->nr_units = nr_units; |
10984 | htab->nr_slots = nr_slots; | |
10985 | htab->hash_table = index_ptr; | |
10986 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10987 | |
10988 | /* Exit early if the table is empty. */ | |
10989 | if (nr_slots == 0 || nr_units == 0 | |
10990 | || (version == 2 && nr_columns == 0)) | |
10991 | { | |
10992 | /* All must be zero. */ | |
10993 | if (nr_slots != 0 || nr_units != 0 | |
10994 | || (version == 2 && nr_columns != 0)) | |
10995 | { | |
10996 | complaint (&symfile_complaints, | |
10997 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
10998 | " all zero [in modules %s]"), | |
10999 | dwp_file->name); | |
11000 | } | |
11001 | return htab; | |
11002 | } | |
11003 | ||
11004 | if (version == 1) | |
11005 | { | |
11006 | htab->section_pool.v1.indices = | |
11007 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11008 | /* It's harder to decide whether the section is too small in v1. | |
11009 | V1 is deprecated anyway so we punt. */ | |
11010 | } | |
11011 | else | |
11012 | { | |
11013 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11014 | int *ids = htab->section_pool.v2.section_ids; | |
11015 | /* Reverse map for error checking. */ | |
11016 | int ids_seen[DW_SECT_MAX + 1]; | |
11017 | int i; | |
11018 | ||
11019 | if (nr_columns < 2) | |
11020 | { | |
11021 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11022 | " in section table [in module %s]"), | |
11023 | dwp_file->name); | |
11024 | } | |
11025 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11026 | { | |
11027 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11028 | " in section table [in module %s]"), | |
11029 | dwp_file->name); | |
11030 | } | |
11031 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
11032 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
11033 | for (i = 0; i < nr_columns; ++i) | |
11034 | { | |
11035 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11036 | ||
11037 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11038 | { | |
11039 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11040 | " in section table [in module %s]"), | |
11041 | id, dwp_file->name); | |
11042 | } | |
11043 | if (ids_seen[id] != -1) | |
11044 | { | |
11045 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11046 | " id %d in section table [in module %s]"), | |
11047 | id, dwp_file->name); | |
11048 | } | |
11049 | ids_seen[id] = i; | |
11050 | ids[i] = id; | |
11051 | } | |
11052 | /* Must have exactly one info or types section. */ | |
11053 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11054 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11055 | != 1) | |
11056 | { | |
11057 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11058 | " DWO info/types section [in module %s]"), | |
11059 | dwp_file->name); | |
11060 | } | |
11061 | /* Must have an abbrev section. */ | |
11062 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11063 | { | |
11064 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11065 | " section [in module %s]"), | |
11066 | dwp_file->name); | |
11067 | } | |
11068 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11069 | htab->section_pool.v2.sizes = | |
11070 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11071 | * nr_units * nr_columns); | |
11072 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11073 | * nr_units * nr_columns)) | |
11074 | > index_end) | |
11075 | { | |
11076 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11077 | " [in module %s]"), | |
11078 | dwp_file->name); | |
11079 | } | |
11080 | } | |
80626a55 DE |
11081 | |
11082 | return htab; | |
11083 | } | |
11084 | ||
11085 | /* Update SECTIONS with the data from SECTP. | |
11086 | ||
11087 | This function is like the other "locate" section routines that are | |
11088 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 11089 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
11090 | |
11091 | The result is non-zero for success, or zero if an error was found. */ | |
11092 | ||
11093 | static int | |
73869dc2 DE |
11094 | locate_v1_virtual_dwo_sections (asection *sectp, |
11095 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11096 | { |
11097 | const struct dwop_section_names *names = &dwop_section_names; | |
11098 | ||
11099 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11100 | { | |
11101 | /* There can be only one. */ | |
049412e3 | 11102 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11103 | return 0; |
049412e3 | 11104 | sections->abbrev.s.section = sectp; |
80626a55 DE |
11105 | sections->abbrev.size = bfd_get_section_size (sectp); |
11106 | } | |
11107 | else if (section_is_p (sectp->name, &names->info_dwo) | |
11108 | || section_is_p (sectp->name, &names->types_dwo)) | |
11109 | { | |
11110 | /* There can be only one. */ | |
049412e3 | 11111 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11112 | return 0; |
049412e3 | 11113 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
11114 | sections->info_or_types.size = bfd_get_section_size (sectp); |
11115 | } | |
11116 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11117 | { | |
11118 | /* There can be only one. */ | |
049412e3 | 11119 | if (sections->line.s.section != NULL) |
80626a55 | 11120 | return 0; |
049412e3 | 11121 | sections->line.s.section = sectp; |
80626a55 DE |
11122 | sections->line.size = bfd_get_section_size (sectp); |
11123 | } | |
11124 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11125 | { | |
11126 | /* There can be only one. */ | |
049412e3 | 11127 | if (sections->loc.s.section != NULL) |
80626a55 | 11128 | return 0; |
049412e3 | 11129 | sections->loc.s.section = sectp; |
80626a55 DE |
11130 | sections->loc.size = bfd_get_section_size (sectp); |
11131 | } | |
11132 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11133 | { | |
11134 | /* There can be only one. */ | |
049412e3 | 11135 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11136 | return 0; |
049412e3 | 11137 | sections->macinfo.s.section = sectp; |
80626a55 DE |
11138 | sections->macinfo.size = bfd_get_section_size (sectp); |
11139 | } | |
11140 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11141 | { | |
11142 | /* There can be only one. */ | |
049412e3 | 11143 | if (sections->macro.s.section != NULL) |
80626a55 | 11144 | return 0; |
049412e3 | 11145 | sections->macro.s.section = sectp; |
80626a55 DE |
11146 | sections->macro.size = bfd_get_section_size (sectp); |
11147 | } | |
11148 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11149 | { | |
11150 | /* There can be only one. */ | |
049412e3 | 11151 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11152 | return 0; |
049412e3 | 11153 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
11154 | sections->str_offsets.size = bfd_get_section_size (sectp); |
11155 | } | |
11156 | else | |
11157 | { | |
11158 | /* No other kind of section is valid. */ | |
11159 | return 0; | |
11160 | } | |
11161 | ||
11162 | return 1; | |
11163 | } | |
11164 | ||
73869dc2 DE |
11165 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11166 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11167 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11168 | This is for DWP version 1 files. */ | |
80626a55 DE |
11169 | |
11170 | static struct dwo_unit * | |
73869dc2 DE |
11171 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
11172 | uint32_t unit_index, | |
11173 | const char *comp_dir, | |
11174 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
11175 | { |
11176 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
11177 | const struct dwp_hash_table *dwp_htab = |
11178 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
11179 | bfd *dbfd = dwp_file->dbfd; |
11180 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11181 | struct dwo_file *dwo_file; | |
11182 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11183 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11184 | void **dwo_file_slot; |
80626a55 DE |
11185 | int i; |
11186 | ||
73869dc2 DE |
11187 | gdb_assert (dwp_file->version == 1); |
11188 | ||
b4f54984 | 11189 | if (dwarf_read_debug) |
80626a55 | 11190 | { |
73869dc2 | 11191 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 11192 | kind, |
73869dc2 | 11193 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
11194 | dwp_file->name); |
11195 | } | |
11196 | ||
19ac8c2e | 11197 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11198 | Put a limit on the number of sections we look for so that bad data |
11199 | doesn't cause us to loop forever. */ | |
11200 | ||
73869dc2 | 11201 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11202 | (1 /* .debug_info or .debug_types */ \ |
11203 | + 1 /* .debug_abbrev */ \ | |
11204 | + 1 /* .debug_line */ \ | |
11205 | + 1 /* .debug_loc */ \ | |
11206 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11207 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11208 | + 1 /* trailing zero */) |
11209 | ||
11210 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11211 | |
73869dc2 | 11212 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11213 | { |
11214 | asection *sectp; | |
11215 | uint32_t section_nr = | |
11216 | read_4_bytes (dbfd, | |
73869dc2 DE |
11217 | dwp_htab->section_pool.v1.indices |
11218 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11219 | |
11220 | if (section_nr == 0) | |
11221 | break; | |
11222 | if (section_nr >= dwp_file->num_sections) | |
11223 | { | |
11224 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11225 | " [in module %s]"), | |
11226 | dwp_file->name); | |
11227 | } | |
11228 | ||
11229 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11230 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11231 | { |
11232 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11233 | " [in module %s]"), | |
11234 | dwp_file->name); | |
11235 | } | |
11236 | } | |
11237 | ||
11238 | if (i < 2 | |
a32a8923 DE |
11239 | || dwarf2_section_empty_p (§ions.info_or_types) |
11240 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
11241 | { |
11242 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11243 | " [in module %s]"), | |
11244 | dwp_file->name); | |
11245 | } | |
73869dc2 | 11246 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11247 | { |
11248 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11249 | " [in module %s]"), | |
11250 | dwp_file->name); | |
11251 | } | |
11252 | ||
11253 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11254 | have dwo_unit "live" in that. At least for now. | |
11255 | ||
11256 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11257 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11258 | file, we can combine them back into a virtual DWO file to save space |
11259 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11260 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11261 | ||
791afaa2 TT |
11262 | std::string virtual_dwo_name = |
11263 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
11264 | get_section_id (§ions.abbrev), | |
11265 | get_section_id (§ions.line), | |
11266 | get_section_id (§ions.loc), | |
11267 | get_section_id (§ions.str_offsets)); | |
80626a55 | 11268 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11269 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
80626a55 DE |
11270 | /* Create one if necessary. */ |
11271 | if (*dwo_file_slot == NULL) | |
11272 | { | |
b4f54984 | 11273 | if (dwarf_read_debug) |
80626a55 DE |
11274 | { |
11275 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11276 | virtual_dwo_name.c_str ()); |
80626a55 DE |
11277 | } |
11278 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11279 | dwo_file->dwo_name |
11280 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11281 | virtual_dwo_name.c_str (), |
11282 | virtual_dwo_name.size ()); | |
0ac5b59e | 11283 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11284 | dwo_file->sections.abbrev = sections.abbrev; |
11285 | dwo_file->sections.line = sections.line; | |
11286 | dwo_file->sections.loc = sections.loc; | |
11287 | dwo_file->sections.macinfo = sections.macinfo; | |
11288 | dwo_file->sections.macro = sections.macro; | |
11289 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11290 | /* The "str" section is global to the entire DWP file. */ | |
11291 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11292 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11293 | there's no need to record it in dwo_file. |
11294 | Also, we can't simply record type sections in dwo_file because | |
11295 | we record a pointer into the vector in dwo_unit. As we collect more | |
11296 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11297 | for it, invalidating all copies of pointers into the previous |
11298 | contents. */ | |
80626a55 DE |
11299 | *dwo_file_slot = dwo_file; |
11300 | } | |
11301 | else | |
11302 | { | |
b4f54984 | 11303 | if (dwarf_read_debug) |
80626a55 DE |
11304 | { |
11305 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11306 | virtual_dwo_name.c_str ()); |
80626a55 | 11307 | } |
9a3c8263 | 11308 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11309 | } |
80626a55 DE |
11310 | |
11311 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11312 | dwo_unit->dwo_file = dwo_file; | |
11313 | dwo_unit->signature = signature; | |
8d749320 SM |
11314 | dwo_unit->section = |
11315 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11316 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11317 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11318 | |
11319 | return dwo_unit; | |
11320 | } | |
11321 | ||
73869dc2 DE |
11322 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11323 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11324 | piece within that section used by a TU/CU, return a virtual section | |
11325 | of just that piece. */ | |
11326 | ||
11327 | static struct dwarf2_section_info | |
11328 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
11329 | bfd_size_type offset, bfd_size_type size) | |
11330 | { | |
11331 | struct dwarf2_section_info result; | |
11332 | asection *sectp; | |
11333 | ||
11334 | gdb_assert (section != NULL); | |
11335 | gdb_assert (!section->is_virtual); | |
11336 | ||
11337 | memset (&result, 0, sizeof (result)); | |
11338 | result.s.containing_section = section; | |
11339 | result.is_virtual = 1; | |
11340 | ||
11341 | if (size == 0) | |
11342 | return result; | |
11343 | ||
11344 | sectp = get_section_bfd_section (section); | |
11345 | ||
11346 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11347 | bounds of the real section. This is a pretty-rare event, so just | |
11348 | flag an error (easier) instead of a warning and trying to cope. */ | |
11349 | if (sectp == NULL | |
11350 | || offset + size > bfd_get_section_size (sectp)) | |
11351 | { | |
73869dc2 DE |
11352 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
11353 | " in section %s [in module %s]"), | |
11354 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
11355 | objfile_name (dwarf2_per_objfile->objfile)); | |
11356 | } | |
11357 | ||
11358 | result.virtual_offset = offset; | |
11359 | result.size = size; | |
11360 | return result; | |
11361 | } | |
11362 | ||
11363 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11364 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11365 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11366 | This is for DWP version 2 files. */ | |
11367 | ||
11368 | static struct dwo_unit * | |
11369 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
11370 | uint32_t unit_index, | |
11371 | const char *comp_dir, | |
11372 | ULONGEST signature, int is_debug_types) | |
11373 | { | |
11374 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11375 | const struct dwp_hash_table *dwp_htab = | |
11376 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11377 | bfd *dbfd = dwp_file->dbfd; | |
11378 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11379 | struct dwo_file *dwo_file; | |
11380 | struct dwo_unit *dwo_unit; | |
11381 | struct virtual_v2_dwo_sections sections; | |
11382 | void **dwo_file_slot; | |
73869dc2 DE |
11383 | int i; |
11384 | ||
11385 | gdb_assert (dwp_file->version == 2); | |
11386 | ||
b4f54984 | 11387 | if (dwarf_read_debug) |
73869dc2 DE |
11388 | { |
11389 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11390 | kind, | |
11391 | pulongest (unit_index), hex_string (signature), | |
11392 | dwp_file->name); | |
11393 | } | |
11394 | ||
11395 | /* Fetch the section offsets of this DWO unit. */ | |
11396 | ||
11397 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11398 | |
11399 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11400 | { | |
11401 | uint32_t offset = read_4_bytes (dbfd, | |
11402 | dwp_htab->section_pool.v2.offsets | |
11403 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11404 | + i) | |
11405 | * sizeof (uint32_t))); | |
11406 | uint32_t size = read_4_bytes (dbfd, | |
11407 | dwp_htab->section_pool.v2.sizes | |
11408 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11409 | + i) | |
11410 | * sizeof (uint32_t))); | |
11411 | ||
11412 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11413 | { | |
11414 | case DW_SECT_INFO: | |
11415 | case DW_SECT_TYPES: | |
11416 | sections.info_or_types_offset = offset; | |
11417 | sections.info_or_types_size = size; | |
11418 | break; | |
11419 | case DW_SECT_ABBREV: | |
11420 | sections.abbrev_offset = offset; | |
11421 | sections.abbrev_size = size; | |
11422 | break; | |
11423 | case DW_SECT_LINE: | |
11424 | sections.line_offset = offset; | |
11425 | sections.line_size = size; | |
11426 | break; | |
11427 | case DW_SECT_LOC: | |
11428 | sections.loc_offset = offset; | |
11429 | sections.loc_size = size; | |
11430 | break; | |
11431 | case DW_SECT_STR_OFFSETS: | |
11432 | sections.str_offsets_offset = offset; | |
11433 | sections.str_offsets_size = size; | |
11434 | break; | |
11435 | case DW_SECT_MACINFO: | |
11436 | sections.macinfo_offset = offset; | |
11437 | sections.macinfo_size = size; | |
11438 | break; | |
11439 | case DW_SECT_MACRO: | |
11440 | sections.macro_offset = offset; | |
11441 | sections.macro_size = size; | |
11442 | break; | |
11443 | } | |
11444 | } | |
11445 | ||
11446 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11447 | have dwo_unit "live" in that. At least for now. | |
11448 | ||
11449 | The DWP file can be made up of a random collection of CUs and TUs. | |
11450 | However, for each CU + set of TUs that came from the same original DWO | |
11451 | file, we can combine them back into a virtual DWO file to save space | |
11452 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11453 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11454 | ||
791afaa2 TT |
11455 | std::string virtual_dwo_name = |
11456 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11457 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11458 | (long) (sections.line_size ? sections.line_offset : 0), | |
11459 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11460 | (long) (sections.str_offsets_size | |
11461 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11462 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11463 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
73869dc2 DE |
11464 | /* Create one if necessary. */ |
11465 | if (*dwo_file_slot == NULL) | |
11466 | { | |
b4f54984 | 11467 | if (dwarf_read_debug) |
73869dc2 DE |
11468 | { |
11469 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11470 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
11471 | } |
11472 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11473 | dwo_file->dwo_name |
11474 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11475 | virtual_dwo_name.c_str (), |
11476 | virtual_dwo_name.size ()); | |
73869dc2 DE |
11477 | dwo_file->comp_dir = comp_dir; |
11478 | dwo_file->sections.abbrev = | |
11479 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
11480 | sections.abbrev_offset, sections.abbrev_size); | |
11481 | dwo_file->sections.line = | |
11482 | create_dwp_v2_section (&dwp_file->sections.line, | |
11483 | sections.line_offset, sections.line_size); | |
11484 | dwo_file->sections.loc = | |
11485 | create_dwp_v2_section (&dwp_file->sections.loc, | |
11486 | sections.loc_offset, sections.loc_size); | |
11487 | dwo_file->sections.macinfo = | |
11488 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
11489 | sections.macinfo_offset, sections.macinfo_size); | |
11490 | dwo_file->sections.macro = | |
11491 | create_dwp_v2_section (&dwp_file->sections.macro, | |
11492 | sections.macro_offset, sections.macro_size); | |
11493 | dwo_file->sections.str_offsets = | |
11494 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
11495 | sections.str_offsets_offset, | |
11496 | sections.str_offsets_size); | |
11497 | /* The "str" section is global to the entire DWP file. */ | |
11498 | dwo_file->sections.str = dwp_file->sections.str; | |
11499 | /* The info or types section is assigned below to dwo_unit, | |
11500 | there's no need to record it in dwo_file. | |
11501 | Also, we can't simply record type sections in dwo_file because | |
11502 | we record a pointer into the vector in dwo_unit. As we collect more | |
11503 | types we'll grow the vector and eventually have to reallocate space | |
11504 | for it, invalidating all copies of pointers into the previous | |
11505 | contents. */ | |
11506 | *dwo_file_slot = dwo_file; | |
11507 | } | |
11508 | else | |
11509 | { | |
b4f54984 | 11510 | if (dwarf_read_debug) |
73869dc2 DE |
11511 | { |
11512 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11513 | virtual_dwo_name.c_str ()); |
73869dc2 | 11514 | } |
9a3c8263 | 11515 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11516 | } |
73869dc2 DE |
11517 | |
11518 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11519 | dwo_unit->dwo_file = dwo_file; | |
11520 | dwo_unit->signature = signature; | |
8d749320 SM |
11521 | dwo_unit->section = |
11522 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
11523 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
11524 | ? &dwp_file->sections.types | |
11525 | : &dwp_file->sections.info, | |
11526 | sections.info_or_types_offset, | |
11527 | sections.info_or_types_size); | |
11528 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11529 | ||
11530 | return dwo_unit; | |
11531 | } | |
11532 | ||
57d63ce2 DE |
11533 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11534 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11535 | |
11536 | static struct dwo_unit * | |
57d63ce2 DE |
11537 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
11538 | ULONGEST signature, int is_debug_types) | |
80626a55 | 11539 | { |
57d63ce2 DE |
11540 | const struct dwp_hash_table *dwp_htab = |
11541 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 11542 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 11543 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11544 | uint32_t hash = signature & mask; |
11545 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11546 | unsigned int i; | |
11547 | void **slot; | |
870f88f7 | 11548 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11549 | |
11550 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11551 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
11552 | slot = htab_find_slot (is_debug_types |
11553 | ? dwp_file->loaded_tus | |
11554 | : dwp_file->loaded_cus, | |
11555 | &find_dwo_cu, INSERT); | |
80626a55 DE |
11556 | |
11557 | if (*slot != NULL) | |
9a3c8263 | 11558 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11559 | |
11560 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11561 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11562 | { |
11563 | ULONGEST signature_in_table; | |
11564 | ||
11565 | signature_in_table = | |
57d63ce2 | 11566 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11567 | if (signature_in_table == signature) |
11568 | { | |
57d63ce2 DE |
11569 | uint32_t unit_index = |
11570 | read_4_bytes (dbfd, | |
11571 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11572 | |
73869dc2 DE |
11573 | if (dwp_file->version == 1) |
11574 | { | |
11575 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
11576 | comp_dir, signature, | |
11577 | is_debug_types); | |
11578 | } | |
11579 | else | |
11580 | { | |
11581 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
11582 | comp_dir, signature, | |
11583 | is_debug_types); | |
11584 | } | |
9a3c8263 | 11585 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11586 | } |
11587 | if (signature_in_table == 0) | |
11588 | return NULL; | |
11589 | hash = (hash + hash2) & mask; | |
11590 | } | |
11591 | ||
11592 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11593 | " [in module %s]"), | |
11594 | dwp_file->name); | |
11595 | } | |
11596 | ||
ab5088bf | 11597 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11598 | Open the file specified by FILE_NAME and hand it off to BFD for |
11599 | preliminary analysis. Return a newly initialized bfd *, which | |
11600 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 11601 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
11602 | SEARCH_CWD is true if the current directory is to be searched. |
11603 | It will be searched before debug-file-directory. | |
13aaf454 DE |
11604 | If successful, the file is added to the bfd include table of the |
11605 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 11606 | If unable to find/open the file, return NULL. |
3019eac3 DE |
11607 | NOTE: This function is derived from symfile_bfd_open. */ |
11608 | ||
192b62ce | 11609 | static gdb_bfd_ref_ptr |
6ac97d4c | 11610 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 11611 | { |
80626a55 | 11612 | int desc, flags; |
3019eac3 | 11613 | char *absolute_name; |
9c02c129 DE |
11614 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
11615 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
11616 | to debug_file_directory. */ | |
11617 | char *search_path; | |
11618 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
11619 | ||
6ac97d4c DE |
11620 | if (search_cwd) |
11621 | { | |
11622 | if (*debug_file_directory != '\0') | |
11623 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 11624 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
11625 | else |
11626 | search_path = xstrdup ("."); | |
11627 | } | |
9c02c129 | 11628 | else |
6ac97d4c | 11629 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 11630 | |
492c0ab7 | 11631 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
11632 | if (is_dwp) |
11633 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 11634 | desc = openp (search_path, flags, file_name, |
3019eac3 | 11635 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 11636 | xfree (search_path); |
3019eac3 DE |
11637 | if (desc < 0) |
11638 | return NULL; | |
11639 | ||
192b62ce | 11640 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 11641 | xfree (absolute_name); |
9c02c129 DE |
11642 | if (sym_bfd == NULL) |
11643 | return NULL; | |
192b62ce | 11644 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 11645 | |
192b62ce TT |
11646 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
11647 | return NULL; | |
3019eac3 | 11648 | |
13aaf454 DE |
11649 | /* Success. Record the bfd as having been included by the objfile's bfd. |
11650 | This is important because things like demangled_names_hash lives in the | |
11651 | objfile's per_bfd space and may have references to things like symbol | |
11652 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 11653 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 11654 | |
3019eac3 DE |
11655 | return sym_bfd; |
11656 | } | |
11657 | ||
ab5088bf | 11658 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
11659 | COMP_DIR is the DW_AT_comp_dir attribute. |
11660 | The result is the bfd handle of the file. | |
11661 | If there is a problem finding or opening the file, return NULL. | |
11662 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11663 | same as symfile_bfd_open. */ | |
11664 | ||
192b62ce | 11665 | static gdb_bfd_ref_ptr |
ab5088bf | 11666 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 11667 | { |
80626a55 | 11668 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 11669 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
11670 | |
11671 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
11672 | ||
11673 | if (comp_dir != NULL) | |
11674 | { | |
b36cec19 PA |
11675 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
11676 | file_name, (char *) NULL); | |
3019eac3 DE |
11677 | |
11678 | /* NOTE: If comp_dir is a relative path, this will also try the | |
11679 | search path, which seems useful. */ | |
192b62ce TT |
11680 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
11681 | 1 /*search_cwd*/)); | |
3019eac3 DE |
11682 | xfree (path_to_try); |
11683 | if (abfd != NULL) | |
11684 | return abfd; | |
11685 | } | |
11686 | ||
11687 | /* That didn't work, try debug-file-directory, which, despite its name, | |
11688 | is a list of paths. */ | |
11689 | ||
11690 | if (*debug_file_directory == '\0') | |
11691 | return NULL; | |
11692 | ||
6ac97d4c | 11693 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
11694 | } |
11695 | ||
80626a55 DE |
11696 | /* This function is mapped across the sections and remembers the offset and |
11697 | size of each of the DWO debugging sections we are interested in. */ | |
11698 | ||
11699 | static void | |
11700 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
11701 | { | |
9a3c8263 | 11702 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
11703 | const struct dwop_section_names *names = &dwop_section_names; |
11704 | ||
11705 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11706 | { | |
049412e3 | 11707 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
11708 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
11709 | } | |
11710 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11711 | { | |
049412e3 | 11712 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
11713 | dwo_sections->info.size = bfd_get_section_size (sectp); |
11714 | } | |
11715 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11716 | { | |
049412e3 | 11717 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
11718 | dwo_sections->line.size = bfd_get_section_size (sectp); |
11719 | } | |
11720 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11721 | { | |
049412e3 | 11722 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
11723 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
11724 | } | |
11725 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11726 | { | |
049412e3 | 11727 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
11728 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
11729 | } | |
11730 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11731 | { | |
049412e3 | 11732 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
11733 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
11734 | } | |
11735 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
11736 | { | |
049412e3 | 11737 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
11738 | dwo_sections->str.size = bfd_get_section_size (sectp); |
11739 | } | |
11740 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11741 | { | |
049412e3 | 11742 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
11743 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
11744 | } | |
11745 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11746 | { | |
11747 | struct dwarf2_section_info type_section; | |
11748 | ||
11749 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 11750 | type_section.s.section = sectp; |
80626a55 DE |
11751 | type_section.size = bfd_get_section_size (sectp); |
11752 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
11753 | &type_section); | |
11754 | } | |
11755 | } | |
11756 | ||
ab5088bf | 11757 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 11758 | by PER_CU. This is for the non-DWP case. |
80626a55 | 11759 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
11760 | |
11761 | static struct dwo_file * | |
0ac5b59e DE |
11762 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
11763 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
11764 | { |
11765 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 11766 | struct dwo_file *dwo_file; |
3019eac3 DE |
11767 | struct cleanup *cleanups; |
11768 | ||
192b62ce | 11769 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
11770 | if (dbfd == NULL) |
11771 | { | |
b4f54984 | 11772 | if (dwarf_read_debug) |
80626a55 DE |
11773 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
11774 | return NULL; | |
11775 | } | |
11776 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
11777 | dwo_file->dwo_name = dwo_name; |
11778 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 11779 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
11780 | |
11781 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
11782 | ||
192b62ce TT |
11783 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
11784 | &dwo_file->sections); | |
3019eac3 | 11785 | |
33c5cd75 | 11786 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 11787 | |
78d4d2c5 JK |
11788 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
11789 | dwo_file->tus); | |
3019eac3 DE |
11790 | |
11791 | discard_cleanups (cleanups); | |
11792 | ||
b4f54984 | 11793 | if (dwarf_read_debug) |
80626a55 DE |
11794 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
11795 | ||
3019eac3 DE |
11796 | return dwo_file; |
11797 | } | |
11798 | ||
80626a55 | 11799 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
11800 | size of each of the DWP debugging sections common to version 1 and 2 that |
11801 | we are interested in. */ | |
3019eac3 | 11802 | |
80626a55 | 11803 | static void |
73869dc2 DE |
11804 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
11805 | void *dwp_file_ptr) | |
3019eac3 | 11806 | { |
9a3c8263 | 11807 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
11808 | const struct dwop_section_names *names = &dwop_section_names; |
11809 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 11810 | |
80626a55 | 11811 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 11812 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
11813 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
11814 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 11815 | |
80626a55 DE |
11816 | /* Look for specific sections that we need. */ |
11817 | if (section_is_p (sectp->name, &names->str_dwo)) | |
11818 | { | |
049412e3 | 11819 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
11820 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
11821 | } | |
11822 | else if (section_is_p (sectp->name, &names->cu_index)) | |
11823 | { | |
049412e3 | 11824 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
11825 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
11826 | } | |
11827 | else if (section_is_p (sectp->name, &names->tu_index)) | |
11828 | { | |
049412e3 | 11829 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
11830 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
11831 | } | |
11832 | } | |
3019eac3 | 11833 | |
73869dc2 DE |
11834 | /* This function is mapped across the sections and remembers the offset and |
11835 | size of each of the DWP version 2 debugging sections that we are interested | |
11836 | in. This is split into a separate function because we don't know if we | |
11837 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
11838 | ||
11839 | static void | |
11840 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
11841 | { | |
9a3c8263 | 11842 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
11843 | const struct dwop_section_names *names = &dwop_section_names; |
11844 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
11845 | ||
11846 | /* Record the ELF section number for later lookup: this is what the | |
11847 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
11848 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
11849 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
11850 | ||
11851 | /* Look for specific sections that we need. */ | |
11852 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11853 | { | |
049412e3 | 11854 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
11855 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
11856 | } | |
11857 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11858 | { | |
049412e3 | 11859 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
11860 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
11861 | } | |
11862 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11863 | { | |
049412e3 | 11864 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11865 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11866 | } | |
11867 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11868 | { | |
049412e3 | 11869 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11870 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11871 | } | |
11872 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11873 | { | |
049412e3 | 11874 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11875 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11876 | } | |
11877 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11878 | { | |
049412e3 | 11879 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11880 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11881 | } | |
11882 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11883 | { | |
049412e3 | 11884 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11885 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11886 | } | |
11887 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11888 | { | |
049412e3 | 11889 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11890 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11891 | } | |
11892 | } | |
11893 | ||
80626a55 | 11894 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11895 | |
80626a55 DE |
11896 | static hashval_t |
11897 | hash_dwp_loaded_cutus (const void *item) | |
11898 | { | |
9a3c8263 | 11899 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11900 | |
80626a55 DE |
11901 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11902 | return dwo_unit->signature; | |
3019eac3 DE |
11903 | } |
11904 | ||
80626a55 | 11905 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11906 | |
80626a55 DE |
11907 | static int |
11908 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11909 | { |
9a3c8263 SM |
11910 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11911 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11912 | |
80626a55 DE |
11913 | return dua->signature == dub->signature; |
11914 | } | |
3019eac3 | 11915 | |
80626a55 | 11916 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11917 | |
80626a55 DE |
11918 | static htab_t |
11919 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11920 | { | |
11921 | return htab_create_alloc_ex (3, | |
11922 | hash_dwp_loaded_cutus, | |
11923 | eq_dwp_loaded_cutus, | |
11924 | NULL, | |
11925 | &objfile->objfile_obstack, | |
11926 | hashtab_obstack_allocate, | |
11927 | dummy_obstack_deallocate); | |
11928 | } | |
3019eac3 | 11929 | |
ab5088bf DE |
11930 | /* Try to open DWP file FILE_NAME. |
11931 | The result is the bfd handle of the file. | |
11932 | If there is a problem finding or opening the file, return NULL. | |
11933 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11934 | same as symfile_bfd_open. */ | |
11935 | ||
192b62ce | 11936 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11937 | open_dwp_file (const char *file_name) |
11938 | { | |
192b62ce TT |
11939 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11940 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11941 | if (abfd != NULL) |
11942 | return abfd; | |
11943 | ||
11944 | /* Work around upstream bug 15652. | |
11945 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11946 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11947 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11948 | of the executable's path may have discarded the needed info. | |
11949 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11950 | .gnu_debuglink, but that doesn't exist yet.] | |
11951 | Strip the directory from FILE_NAME and search again. */ | |
11952 | if (*debug_file_directory != '\0') | |
11953 | { | |
11954 | /* Don't implicitly search the current directory here. | |
11955 | If the user wants to search "." to handle this case, | |
11956 | it must be added to debug-file-directory. */ | |
11957 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11958 | 0 /*search_cwd*/); | |
11959 | } | |
11960 | ||
11961 | return NULL; | |
ab5088bf DE |
11962 | } |
11963 | ||
80626a55 DE |
11964 | /* Initialize the use of the DWP file for the current objfile. |
11965 | By convention the name of the DWP file is ${objfile}.dwp. | |
11966 | The result is NULL if it can't be found. */ | |
a766d390 | 11967 | |
80626a55 | 11968 | static struct dwp_file * |
ab5088bf | 11969 | open_and_init_dwp_file (void) |
80626a55 DE |
11970 | { |
11971 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11972 | struct dwp_file *dwp_file; | |
80626a55 | 11973 | |
82bf32bc JK |
11974 | /* Try to find first .dwp for the binary file before any symbolic links |
11975 | resolving. */ | |
6c447423 DE |
11976 | |
11977 | /* If the objfile is a debug file, find the name of the real binary | |
11978 | file and get the name of dwp file from there. */ | |
d721ba37 | 11979 | std::string dwp_name; |
6c447423 DE |
11980 | if (objfile->separate_debug_objfile_backlink != NULL) |
11981 | { | |
11982 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11983 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11984 | |
d721ba37 | 11985 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11986 | } |
11987 | else | |
d721ba37 PA |
11988 | dwp_name = objfile->original_name; |
11989 | ||
11990 | dwp_name += ".dwp"; | |
80626a55 | 11991 | |
d721ba37 | 11992 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
11993 | if (dbfd == NULL |
11994 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
11995 | { | |
11996 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
11997 | dwp_name = objfile_name (objfile); |
11998 | dwp_name += ".dwp"; | |
11999 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
12000 | } |
12001 | ||
80626a55 DE |
12002 | if (dbfd == NULL) |
12003 | { | |
b4f54984 | 12004 | if (dwarf_read_debug) |
d721ba37 | 12005 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 12006 | return NULL; |
3019eac3 | 12007 | } |
80626a55 | 12008 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
12009 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
12010 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 12011 | |
80626a55 | 12012 | /* +1: section 0 is unused */ |
192b62ce | 12013 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
12014 | dwp_file->elf_sections = |
12015 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
12016 | dwp_file->num_sections, asection *); | |
12017 | ||
192b62ce TT |
12018 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
12019 | dwp_file); | |
80626a55 DE |
12020 | |
12021 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
12022 | ||
12023 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
12024 | ||
73869dc2 | 12025 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12026 | if (dwp_file->cus && dwp_file->tus |
12027 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12028 | { |
12029 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12030 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12031 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12032 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12033 | " TU version %s [in DWP file %s]"), | |
12034 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12035 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12036 | } |
08302ed2 DE |
12037 | |
12038 | if (dwp_file->cus) | |
12039 | dwp_file->version = dwp_file->cus->version; | |
12040 | else if (dwp_file->tus) | |
12041 | dwp_file->version = dwp_file->tus->version; | |
12042 | else | |
12043 | dwp_file->version = 2; | |
73869dc2 DE |
12044 | |
12045 | if (dwp_file->version == 2) | |
192b62ce TT |
12046 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
12047 | dwp_file); | |
73869dc2 | 12048 | |
19ac8c2e DE |
12049 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
12050 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 12051 | |
b4f54984 | 12052 | if (dwarf_read_debug) |
80626a55 DE |
12053 | { |
12054 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
12055 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
12056 | " %s CUs, %s TUs\n", |
12057 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12058 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12059 | } |
12060 | ||
12061 | return dwp_file; | |
3019eac3 | 12062 | } |
c906108c | 12063 | |
ab5088bf DE |
12064 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12065 | ||
12066 | static struct dwp_file * | |
12067 | get_dwp_file (void) | |
12068 | { | |
12069 | if (! dwarf2_per_objfile->dwp_checked) | |
12070 | { | |
12071 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
12072 | dwarf2_per_objfile->dwp_checked = 1; | |
12073 | } | |
12074 | return dwarf2_per_objfile->dwp_file; | |
12075 | } | |
12076 | ||
80626a55 DE |
12077 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12078 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12079 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12080 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12081 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12082 | ||
12083 | This is called, for example, when wanting to read a variable with a | |
12084 | complex location. Therefore we don't want to do file i/o for every call. | |
12085 | Therefore we don't want to look for a DWO file on every call. | |
12086 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12087 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12088 | for a DWO file. | |
12089 | ||
1c658ad5 | 12090 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12091 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12092 | |
3019eac3 | 12093 | static struct dwo_unit * |
80626a55 DE |
12094 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
12095 | const char *dwo_name, const char *comp_dir, | |
12096 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
12097 | { |
12098 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
12099 | const char *kind = is_debug_types ? "TU" : "CU"; |
12100 | void **dwo_file_slot; | |
3019eac3 | 12101 | struct dwo_file *dwo_file; |
80626a55 | 12102 | struct dwp_file *dwp_file; |
cb1df416 | 12103 | |
6a506a2d DE |
12104 | /* First see if there's a DWP file. |
12105 | If we have a DWP file but didn't find the DWO inside it, don't | |
12106 | look for the original DWO file. It makes gdb behave differently | |
12107 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12108 | |
ab5088bf | 12109 | dwp_file = get_dwp_file (); |
80626a55 | 12110 | if (dwp_file != NULL) |
cf2c3c16 | 12111 | { |
80626a55 DE |
12112 | const struct dwp_hash_table *dwp_htab = |
12113 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12114 | ||
12115 | if (dwp_htab != NULL) | |
12116 | { | |
12117 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
12118 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
12119 | signature, is_debug_types); | |
80626a55 DE |
12120 | |
12121 | if (dwo_cutu != NULL) | |
12122 | { | |
b4f54984 | 12123 | if (dwarf_read_debug) |
80626a55 DE |
12124 | { |
12125 | fprintf_unfiltered (gdb_stdlog, | |
12126 | "Virtual DWO %s %s found: @%s\n", | |
12127 | kind, hex_string (signature), | |
12128 | host_address_to_string (dwo_cutu)); | |
12129 | } | |
12130 | return dwo_cutu; | |
12131 | } | |
12132 | } | |
12133 | } | |
6a506a2d | 12134 | else |
80626a55 | 12135 | { |
6a506a2d | 12136 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12137 | |
6a506a2d DE |
12138 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
12139 | if (*dwo_file_slot == NULL) | |
80626a55 | 12140 | { |
6a506a2d DE |
12141 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
12142 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 12143 | } |
6a506a2d | 12144 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12145 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12146 | |
6a506a2d | 12147 | if (dwo_file != NULL) |
19c3d4c9 | 12148 | { |
6a506a2d DE |
12149 | struct dwo_unit *dwo_cutu = NULL; |
12150 | ||
12151 | if (is_debug_types && dwo_file->tus) | |
12152 | { | |
12153 | struct dwo_unit find_dwo_cutu; | |
12154 | ||
12155 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12156 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
12157 | dwo_cutu |
12158 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 12159 | } |
33c5cd75 | 12160 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12161 | { |
33c5cd75 DB |
12162 | struct dwo_unit find_dwo_cutu; |
12163 | ||
12164 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12165 | find_dwo_cutu.signature = signature; | |
12166 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
12167 | &find_dwo_cutu); | |
6a506a2d DE |
12168 | } |
12169 | ||
12170 | if (dwo_cutu != NULL) | |
12171 | { | |
b4f54984 | 12172 | if (dwarf_read_debug) |
6a506a2d DE |
12173 | { |
12174 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
12175 | kind, dwo_name, hex_string (signature), | |
12176 | host_address_to_string (dwo_cutu)); | |
12177 | } | |
12178 | return dwo_cutu; | |
80626a55 DE |
12179 | } |
12180 | } | |
2e276125 | 12181 | } |
9cdd5dbd | 12182 | |
80626a55 DE |
12183 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12184 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12185 | correctly to find the file. */ | |
12186 | ||
b4f54984 | 12187 | if (dwarf_read_debug) |
80626a55 DE |
12188 | { |
12189 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
12190 | kind, dwo_name, hex_string (signature)); | |
12191 | } | |
3019eac3 | 12192 | |
6656a72d DE |
12193 | /* This is a warning and not a complaint because it can be caused by |
12194 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12195 | { |
12196 | /* Print the name of the DWP file if we looked there, helps the user | |
12197 | better diagnose the problem. */ | |
791afaa2 | 12198 | std::string dwp_text; |
43942612 DE |
12199 | |
12200 | if (dwp_file != NULL) | |
791afaa2 TT |
12201 | dwp_text = string_printf (" [in DWP file %s]", |
12202 | lbasename (dwp_file->name)); | |
43942612 DE |
12203 | |
12204 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
12205 | " [in module %s]"), | |
12206 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 12207 | dwp_text.c_str (), |
43942612 | 12208 | this_unit->is_debug_types ? "TU" : "CU", |
9c541725 | 12209 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 12210 | } |
3019eac3 | 12211 | return NULL; |
5fb290d7 DJ |
12212 | } |
12213 | ||
80626a55 DE |
12214 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12215 | See lookup_dwo_cutu_unit for details. */ | |
12216 | ||
12217 | static struct dwo_unit * | |
12218 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
12219 | const char *dwo_name, const char *comp_dir, | |
12220 | ULONGEST signature) | |
12221 | { | |
12222 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
12223 | } | |
12224 | ||
12225 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12226 | See lookup_dwo_cutu_unit for details. */ | |
12227 | ||
12228 | static struct dwo_unit * | |
12229 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
12230 | const char *dwo_name, const char *comp_dir) | |
12231 | { | |
12232 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
12233 | } | |
12234 | ||
89e63ee4 DE |
12235 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12236 | ||
12237 | static int | |
12238 | queue_and_load_dwo_tu (void **slot, void *info) | |
12239 | { | |
12240 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
12241 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
12242 | ULONGEST signature = dwo_unit->signature; | |
12243 | struct signatured_type *sig_type = | |
12244 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
12245 | ||
12246 | if (sig_type != NULL) | |
12247 | { | |
12248 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
12249 | ||
12250 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
12251 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12252 | while processing PER_CU. */ | |
12253 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
12254 | load_full_type_unit (sig_cu); | |
12255 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
12256 | } | |
12257 | ||
12258 | return 1; | |
12259 | } | |
12260 | ||
12261 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
12262 | The DWO may have the only definition of the type, though it may not be | |
12263 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12264 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12265 | ||
12266 | static void | |
12267 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
12268 | { | |
12269 | struct dwo_unit *dwo_unit; | |
12270 | struct dwo_file *dwo_file; | |
12271 | ||
12272 | gdb_assert (!per_cu->is_debug_types); | |
12273 | gdb_assert (get_dwp_file () == NULL); | |
12274 | gdb_assert (per_cu->cu != NULL); | |
12275 | ||
12276 | dwo_unit = per_cu->cu->dwo_unit; | |
12277 | gdb_assert (dwo_unit != NULL); | |
12278 | ||
12279 | dwo_file = dwo_unit->dwo_file; | |
12280 | if (dwo_file->tus != NULL) | |
12281 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
12282 | } | |
12283 | ||
3019eac3 DE |
12284 | /* Free all resources associated with DWO_FILE. |
12285 | Close the DWO file and munmap the sections. | |
12286 | All memory should be on the objfile obstack. */ | |
348e048f DE |
12287 | |
12288 | static void | |
3019eac3 | 12289 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 12290 | { |
348e048f | 12291 | |
5c6fa7ab | 12292 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 12293 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 12294 | |
3019eac3 DE |
12295 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
12296 | } | |
348e048f | 12297 | |
3019eac3 | 12298 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 12299 | |
3019eac3 DE |
12300 | static void |
12301 | free_dwo_file_cleanup (void *arg) | |
12302 | { | |
12303 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
12304 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 12305 | |
3019eac3 DE |
12306 | free_dwo_file (dwo_file, objfile); |
12307 | } | |
348e048f | 12308 | |
3019eac3 | 12309 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 12310 | |
3019eac3 DE |
12311 | static int |
12312 | free_dwo_file_from_slot (void **slot, void *info) | |
12313 | { | |
12314 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
12315 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 12316 | |
3019eac3 | 12317 | free_dwo_file (dwo_file, objfile); |
348e048f | 12318 | |
3019eac3 DE |
12319 | return 1; |
12320 | } | |
348e048f | 12321 | |
3019eac3 | 12322 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 12323 | |
3019eac3 DE |
12324 | static void |
12325 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
12326 | { | |
12327 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 12328 | } |
3019eac3 DE |
12329 | \f |
12330 | /* Read in various DIEs. */ | |
348e048f | 12331 | |
d389af10 | 12332 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12333 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12334 | already referenced by DW_AT_abstract_origin from the children of the | |
12335 | current DIE. */ | |
d389af10 JK |
12336 | |
12337 | static void | |
12338 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12339 | { | |
12340 | struct die_info *child_die; | |
791afaa2 | 12341 | sect_offset *offsetp; |
d389af10 JK |
12342 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12343 | struct die_info *origin_die; | |
12344 | /* Iterator of the ORIGIN_DIE children. */ | |
12345 | struct die_info *origin_child_die; | |
d389af10 | 12346 | struct attribute *attr; |
cd02d79d PA |
12347 | struct dwarf2_cu *origin_cu; |
12348 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12349 | |
12350 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12351 | if (!attr) | |
12352 | return; | |
12353 | ||
cd02d79d PA |
12354 | /* Note that following die references may follow to a die in a |
12355 | different cu. */ | |
12356 | ||
12357 | origin_cu = cu; | |
12358 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12359 | ||
12360 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12361 | symbols in. */ | |
12362 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12363 | origin_cu->list_in_scope = cu->list_in_scope; | |
12364 | ||
edb3359d DJ |
12365 | if (die->tag != origin_die->tag |
12366 | && !(die->tag == DW_TAG_inlined_subroutine | |
12367 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12368 | complaint (&symfile_complaints, |
12369 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
12370 | to_underlying (die->sect_off), |
12371 | to_underlying (origin_die->sect_off)); | |
d389af10 | 12372 | |
791afaa2 | 12373 | std::vector<sect_offset> offsets; |
d389af10 | 12374 | |
3ea89b92 PMR |
12375 | for (child_die = die->child; |
12376 | child_die && child_die->tag; | |
12377 | child_die = sibling_die (child_die)) | |
12378 | { | |
12379 | struct die_info *child_origin_die; | |
12380 | struct dwarf2_cu *child_origin_cu; | |
12381 | ||
12382 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12383 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12384 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12385 | present in the abstract instance but not referenced in the concrete | |
12386 | one. */ | |
216f72a1 JK |
12387 | if (child_die->tag == DW_TAG_call_site |
12388 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12389 | continue; |
12390 | ||
c38f313d DJ |
12391 | /* For each CHILD_DIE, find the corresponding child of |
12392 | ORIGIN_DIE. If there is more than one layer of | |
12393 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12394 | but GCC versions at least through 4.4 generate this (GCC PR | |
12395 | 40573). */ | |
3ea89b92 PMR |
12396 | child_origin_die = child_die; |
12397 | child_origin_cu = cu; | |
c38f313d DJ |
12398 | while (1) |
12399 | { | |
cd02d79d PA |
12400 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12401 | child_origin_cu); | |
c38f313d DJ |
12402 | if (attr == NULL) |
12403 | break; | |
cd02d79d PA |
12404 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12405 | &child_origin_cu); | |
c38f313d DJ |
12406 | } |
12407 | ||
d389af10 JK |
12408 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12409 | counterpart may exist. */ | |
c38f313d | 12410 | if (child_origin_die != child_die) |
d389af10 | 12411 | { |
edb3359d DJ |
12412 | if (child_die->tag != child_origin_die->tag |
12413 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12414 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12415 | complaint (&symfile_complaints, |
12416 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12417 | "different tags"), |
12418 | to_underlying (child_die->sect_off), | |
12419 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
12420 | if (child_origin_die->parent != origin_die) |
12421 | complaint (&symfile_complaints, | |
12422 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12423 | "different parents"), |
12424 | to_underlying (child_die->sect_off), | |
12425 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 12426 | else |
791afaa2 | 12427 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12428 | } |
d389af10 | 12429 | } |
791afaa2 TT |
12430 | std::sort (offsets.begin (), offsets.end ()); |
12431 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12432 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12433 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
12434 | complaint (&symfile_complaints, |
12435 | _("Multiple children of DIE 0x%x refer " | |
12436 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 12437 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 | 12438 | |
791afaa2 | 12439 | offsetp = offsets.data (); |
d389af10 JK |
12440 | origin_child_die = origin_die->child; |
12441 | while (origin_child_die && origin_child_die->tag) | |
12442 | { | |
12443 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12444 | while (offsetp < offsets_end |
9c541725 | 12445 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12446 | offsetp++; |
b64f50a1 | 12447 | if (offsetp >= offsets_end |
9c541725 | 12448 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12449 | { |
adde2bff DE |
12450 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12451 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12452 | This can happen with mutually referenced abstract_origins. | |
12453 | PR 16581. */ | |
12454 | if (!origin_child_die->in_process) | |
12455 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12456 | } |
12457 | origin_child_die = sibling_die (origin_child_die); | |
12458 | } | |
cd02d79d | 12459 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
12460 | } |
12461 | ||
c906108c | 12462 | static void |
e7c27a73 | 12463 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12464 | { |
e7c27a73 | 12465 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12466 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12467 | struct context_stack *newobj; |
c906108c SS |
12468 | CORE_ADDR lowpc; |
12469 | CORE_ADDR highpc; | |
12470 | struct die_info *child_die; | |
edb3359d | 12471 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12472 | const char *name; |
e142c38c | 12473 | CORE_ADDR baseaddr; |
801e3a5b | 12474 | struct block *block; |
edb3359d | 12475 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12476 | std::vector<struct symbol *> template_args; |
34eaf542 | 12477 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12478 | |
12479 | if (inlined_func) | |
12480 | { | |
12481 | /* If we do not have call site information, we can't show the | |
12482 | caller of this inlined function. That's too confusing, so | |
12483 | only use the scope for local variables. */ | |
12484 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12485 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12486 | if (call_line == NULL || call_file == NULL) | |
12487 | { | |
12488 | read_lexical_block_scope (die, cu); | |
12489 | return; | |
12490 | } | |
12491 | } | |
c906108c | 12492 | |
e142c38c DJ |
12493 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
12494 | ||
94af9270 | 12495 | name = dwarf2_name (die, cu); |
c906108c | 12496 | |
e8d05480 JB |
12497 | /* Ignore functions with missing or empty names. These are actually |
12498 | illegal according to the DWARF standard. */ | |
12499 | if (name == NULL) | |
12500 | { | |
12501 | complaint (&symfile_complaints, | |
b64f50a1 | 12502 | _("missing name for subprogram DIE at %d"), |
9c541725 | 12503 | to_underlying (die->sect_off)); |
e8d05480 JB |
12504 | return; |
12505 | } | |
12506 | ||
12507 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12508 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12509 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12510 | { |
ae4d0c03 PM |
12511 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12512 | if (!attr || !DW_UNSND (attr)) | |
12513 | complaint (&symfile_complaints, | |
3e43a32a MS |
12514 | _("cannot get low and high bounds " |
12515 | "for subprogram DIE at %d"), | |
9c541725 | 12516 | to_underlying (die->sect_off)); |
e8d05480 JB |
12517 | return; |
12518 | } | |
c906108c | 12519 | |
3e29f34a MR |
12520 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12521 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12522 | |
34eaf542 TT |
12523 | /* If we have any template arguments, then we must allocate a |
12524 | different sort of symbol. */ | |
12525 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12526 | { | |
12527 | if (child_die->tag == DW_TAG_template_type_param | |
12528 | || child_die->tag == DW_TAG_template_value_param) | |
12529 | { | |
e623cf5d | 12530 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 12531 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12532 | break; |
12533 | } | |
12534 | } | |
12535 | ||
fe978cb0 PA |
12536 | newobj = push_context (0, lowpc); |
12537 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 12538 | (struct symbol *) templ_func); |
4c2df51b | 12539 | |
4cecd739 DJ |
12540 | /* If there is a location expression for DW_AT_frame_base, record |
12541 | it. */ | |
e142c38c | 12542 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 12543 | if (attr) |
fe978cb0 | 12544 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12545 | |
63e43d3a PMR |
12546 | /* If there is a location for the static link, record it. */ |
12547 | newobj->static_link = NULL; | |
12548 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
12549 | if (attr) | |
12550 | { | |
224c3ddb SM |
12551 | newobj->static_link |
12552 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
12553 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
12554 | } | |
12555 | ||
e142c38c | 12556 | cu->list_in_scope = &local_symbols; |
c906108c | 12557 | |
639d11d3 | 12558 | if (die->child != NULL) |
c906108c | 12559 | { |
639d11d3 | 12560 | child_die = die->child; |
c906108c SS |
12561 | while (child_die && child_die->tag) |
12562 | { | |
34eaf542 TT |
12563 | if (child_die->tag == DW_TAG_template_type_param |
12564 | || child_die->tag == DW_TAG_template_value_param) | |
12565 | { | |
12566 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12567 | ||
f1078f66 | 12568 | if (arg != NULL) |
2f4732b0 | 12569 | template_args.push_back (arg); |
34eaf542 TT |
12570 | } |
12571 | else | |
12572 | process_die (child_die, cu); | |
c906108c SS |
12573 | child_die = sibling_die (child_die); |
12574 | } | |
12575 | } | |
12576 | ||
d389af10 JK |
12577 | inherit_abstract_dies (die, cu); |
12578 | ||
4a811a97 UW |
12579 | /* If we have a DW_AT_specification, we might need to import using |
12580 | directives from the context of the specification DIE. See the | |
12581 | comment in determine_prefix. */ | |
12582 | if (cu->language == language_cplus | |
12583 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12584 | { | |
12585 | struct dwarf2_cu *spec_cu = cu; | |
12586 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12587 | ||
12588 | while (spec_die) | |
12589 | { | |
12590 | child_die = spec_die->child; | |
12591 | while (child_die && child_die->tag) | |
12592 | { | |
12593 | if (child_die->tag == DW_TAG_imported_module) | |
12594 | process_die (child_die, spec_cu); | |
12595 | child_die = sibling_die (child_die); | |
12596 | } | |
12597 | ||
12598 | /* In some cases, GCC generates specification DIEs that | |
12599 | themselves contain DW_AT_specification attributes. */ | |
12600 | spec_die = die_specification (spec_die, &spec_cu); | |
12601 | } | |
12602 | } | |
12603 | ||
fe978cb0 | 12604 | newobj = pop_context (); |
c906108c | 12605 | /* Make a block for the local symbols within. */ |
fe978cb0 | 12606 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 12607 | newobj->static_link, lowpc, highpc); |
801e3a5b | 12608 | |
df8a16a1 | 12609 | /* For C++, set the block's scope. */ |
45280282 IB |
12610 | if ((cu->language == language_cplus |
12611 | || cu->language == language_fortran | |
c44af4eb TT |
12612 | || cu->language == language_d |
12613 | || cu->language == language_rust) | |
4d4ec4e5 | 12614 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12615 | block_set_scope (block, determine_prefix (die, cu), |
12616 | &objfile->objfile_obstack); | |
df8a16a1 | 12617 | |
801e3a5b JB |
12618 | /* If we have address ranges, record them. */ |
12619 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12620 | |
fe978cb0 | 12621 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 12622 | |
34eaf542 | 12623 | /* Attach template arguments to function. */ |
2f4732b0 | 12624 | if (!template_args.empty ()) |
34eaf542 TT |
12625 | { |
12626 | gdb_assert (templ_func != NULL); | |
12627 | ||
2f4732b0 | 12628 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 12629 | templ_func->template_arguments |
8d749320 SM |
12630 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
12631 | templ_func->n_template_arguments); | |
34eaf542 | 12632 | memcpy (templ_func->template_arguments, |
2f4732b0 | 12633 | template_args.data (), |
34eaf542 | 12634 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
34eaf542 TT |
12635 | } |
12636 | ||
208d8187 JB |
12637 | /* In C++, we can have functions nested inside functions (e.g., when |
12638 | a function declares a class that has methods). This means that | |
12639 | when we finish processing a function scope, we may need to go | |
12640 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 12641 | local_symbols = newobj->locals; |
22cee43f | 12642 | local_using_directives = newobj->local_using_directives; |
208d8187 | 12643 | |
921e78cf JB |
12644 | /* If we've finished processing a top-level function, subsequent |
12645 | symbols go in the file symbol list. */ | |
12646 | if (outermost_context_p ()) | |
e142c38c | 12647 | cu->list_in_scope = &file_symbols; |
c906108c SS |
12648 | } |
12649 | ||
12650 | /* Process all the DIES contained within a lexical block scope. Start | |
12651 | a new scope, process the dies, and then close the scope. */ | |
12652 | ||
12653 | static void | |
e7c27a73 | 12654 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12655 | { |
e7c27a73 | 12656 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12657 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12658 | struct context_stack *newobj; |
c906108c SS |
12659 | CORE_ADDR lowpc, highpc; |
12660 | struct die_info *child_die; | |
e142c38c DJ |
12661 | CORE_ADDR baseaddr; |
12662 | ||
12663 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
12664 | |
12665 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
12666 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
12667 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 12668 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 12669 | describe ranges. */ |
e385593e JK |
12670 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
12671 | { | |
12672 | case PC_BOUNDS_NOT_PRESENT: | |
12673 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
12674 | there was no wrapping by that DW_TAG_lexical_block. | |
12675 | GCC does no longer produces such DWARF since GCC r224161. */ | |
12676 | for (child_die = die->child; | |
12677 | child_die != NULL && child_die->tag; | |
12678 | child_die = sibling_die (child_die)) | |
12679 | process_die (child_die, cu); | |
12680 | return; | |
12681 | case PC_BOUNDS_INVALID: | |
12682 | return; | |
12683 | } | |
3e29f34a MR |
12684 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12685 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
12686 | |
12687 | push_context (0, lowpc); | |
639d11d3 | 12688 | if (die->child != NULL) |
c906108c | 12689 | { |
639d11d3 | 12690 | child_die = die->child; |
c906108c SS |
12691 | while (child_die && child_die->tag) |
12692 | { | |
e7c27a73 | 12693 | process_die (child_die, cu); |
c906108c SS |
12694 | child_die = sibling_die (child_die); |
12695 | } | |
12696 | } | |
3ea89b92 | 12697 | inherit_abstract_dies (die, cu); |
fe978cb0 | 12698 | newobj = pop_context (); |
c906108c | 12699 | |
22cee43f | 12700 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 12701 | { |
801e3a5b | 12702 | struct block *block |
63e43d3a | 12703 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 12704 | newobj->start_addr, highpc); |
801e3a5b JB |
12705 | |
12706 | /* Note that recording ranges after traversing children, as we | |
12707 | do here, means that recording a parent's ranges entails | |
12708 | walking across all its children's ranges as they appear in | |
12709 | the address map, which is quadratic behavior. | |
12710 | ||
12711 | It would be nicer to record the parent's ranges before | |
12712 | traversing its children, simply overriding whatever you find | |
12713 | there. But since we don't even decide whether to create a | |
12714 | block until after we've traversed its children, that's hard | |
12715 | to do. */ | |
12716 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 12717 | } |
fe978cb0 | 12718 | local_symbols = newobj->locals; |
22cee43f | 12719 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
12720 | } |
12721 | ||
216f72a1 | 12722 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
12723 | |
12724 | static void | |
12725 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12726 | { | |
12727 | struct objfile *objfile = cu->objfile; | |
12728 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12729 | CORE_ADDR pc, baseaddr; | |
12730 | struct attribute *attr; | |
12731 | struct call_site *call_site, call_site_local; | |
12732 | void **slot; | |
12733 | int nparams; | |
12734 | struct die_info *child_die; | |
12735 | ||
12736 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12737 | ||
216f72a1 JK |
12738 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
12739 | if (attr == NULL) | |
12740 | { | |
12741 | /* This was a pre-DWARF-5 GNU extension alias | |
12742 | for DW_AT_call_return_pc. */ | |
12743 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
12744 | } | |
96408a79 SA |
12745 | if (!attr) |
12746 | { | |
12747 | complaint (&symfile_complaints, | |
216f72a1 | 12748 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 12749 | "DIE 0x%x [in module %s]"), |
9c541725 | 12750 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12751 | return; |
12752 | } | |
31aa7e4e | 12753 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 12754 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
12755 | |
12756 | if (cu->call_site_htab == NULL) | |
12757 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
12758 | NULL, &objfile->objfile_obstack, | |
12759 | hashtab_obstack_allocate, NULL); | |
12760 | call_site_local.pc = pc; | |
12761 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
12762 | if (*slot != NULL) | |
12763 | { | |
12764 | complaint (&symfile_complaints, | |
216f72a1 | 12765 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 12766 | "DIE 0x%x [in module %s]"), |
9c541725 | 12767 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 12768 | objfile_name (objfile)); |
96408a79 SA |
12769 | return; |
12770 | } | |
12771 | ||
12772 | /* Count parameters at the caller. */ | |
12773 | ||
12774 | nparams = 0; | |
12775 | for (child_die = die->child; child_die && child_die->tag; | |
12776 | child_die = sibling_die (child_die)) | |
12777 | { | |
216f72a1 JK |
12778 | if (child_die->tag != DW_TAG_call_site_parameter |
12779 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12780 | { |
12781 | complaint (&symfile_complaints, | |
216f72a1 JK |
12782 | _("Tag %d is not DW_TAG_call_site_parameter in " |
12783 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 12784 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 12785 | objfile_name (objfile)); |
96408a79 SA |
12786 | continue; |
12787 | } | |
12788 | ||
12789 | nparams++; | |
12790 | } | |
12791 | ||
224c3ddb SM |
12792 | call_site |
12793 | = ((struct call_site *) | |
12794 | obstack_alloc (&objfile->objfile_obstack, | |
12795 | sizeof (*call_site) | |
12796 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
12797 | *slot = call_site; |
12798 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
12799 | call_site->pc = pc; | |
12800 | ||
216f72a1 JK |
12801 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
12802 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
12803 | { |
12804 | struct die_info *func_die; | |
12805 | ||
12806 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
12807 | for (func_die = die->parent; | |
12808 | func_die && func_die->tag != DW_TAG_subprogram | |
12809 | && func_die->tag != DW_TAG_subroutine_type; | |
12810 | func_die = func_die->parent); | |
12811 | ||
216f72a1 JK |
12812 | /* DW_AT_call_all_calls is a superset |
12813 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 12814 | if (func_die |
216f72a1 | 12815 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 12816 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 12817 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
12818 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
12819 | { | |
12820 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
12821 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
12822 | both the initial caller containing the real return address PC and | |
12823 | the final callee containing the current PC of a chain of tail | |
12824 | calls do not need to have the tail call list complete. But any | |
12825 | function candidate for a virtual tail call frame searched via | |
12826 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
12827 | determined unambiguously. */ | |
12828 | } | |
12829 | else | |
12830 | { | |
12831 | struct type *func_type = NULL; | |
12832 | ||
12833 | if (func_die) | |
12834 | func_type = get_die_type (func_die, cu); | |
12835 | if (func_type != NULL) | |
12836 | { | |
12837 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
12838 | ||
12839 | /* Enlist this call site to the function. */ | |
12840 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
12841 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
12842 | } | |
12843 | else | |
12844 | complaint (&symfile_complaints, | |
216f72a1 | 12845 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 12846 | "DIE 0x%x [in module %s]"), |
9c541725 | 12847 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12848 | } |
12849 | } | |
12850 | ||
216f72a1 JK |
12851 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
12852 | if (attr == NULL) | |
12853 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
12854 | if (attr == NULL) | |
12855 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 12856 | if (attr == NULL) |
216f72a1 JK |
12857 | { |
12858 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
12859 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12860 | } | |
96408a79 SA |
12861 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12862 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12863 | /* Keep NULL DWARF_BLOCK. */; | |
12864 | else if (attr_form_is_block (attr)) | |
12865 | { | |
12866 | struct dwarf2_locexpr_baton *dlbaton; | |
12867 | ||
8d749320 | 12868 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12869 | dlbaton->data = DW_BLOCK (attr)->data; |
12870 | dlbaton->size = DW_BLOCK (attr)->size; | |
12871 | dlbaton->per_cu = cu->per_cu; | |
12872 | ||
12873 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12874 | } | |
7771576e | 12875 | else if (attr_form_is_ref (attr)) |
96408a79 | 12876 | { |
96408a79 SA |
12877 | struct dwarf2_cu *target_cu = cu; |
12878 | struct die_info *target_die; | |
12879 | ||
ac9ec31b | 12880 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12881 | gdb_assert (target_cu->objfile == objfile); |
12882 | if (die_is_declaration (target_die, target_cu)) | |
12883 | { | |
7d45c7c3 | 12884 | const char *target_physname; |
9112db09 JK |
12885 | |
12886 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12887 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12888 | if (target_physname == NULL) |
9112db09 | 12889 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12890 | if (target_physname == NULL) |
12891 | complaint (&symfile_complaints, | |
216f72a1 | 12892 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12893 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12894 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12895 | else |
7d455152 | 12896 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12897 | } |
12898 | else | |
12899 | { | |
12900 | CORE_ADDR lowpc; | |
12901 | ||
12902 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12903 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12904 | <= PC_BOUNDS_INVALID) |
96408a79 | 12905 | complaint (&symfile_complaints, |
216f72a1 | 12906 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12907 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12908 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12909 | else |
3e29f34a MR |
12910 | { |
12911 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12912 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12913 | } | |
96408a79 SA |
12914 | } |
12915 | } | |
12916 | else | |
12917 | complaint (&symfile_complaints, | |
216f72a1 | 12918 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12919 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12920 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12921 | |
12922 | call_site->per_cu = cu->per_cu; | |
12923 | ||
12924 | for (child_die = die->child; | |
12925 | child_die && child_die->tag; | |
12926 | child_die = sibling_die (child_die)) | |
12927 | { | |
96408a79 | 12928 | struct call_site_parameter *parameter; |
1788b2d3 | 12929 | struct attribute *loc, *origin; |
96408a79 | 12930 | |
216f72a1 JK |
12931 | if (child_die->tag != DW_TAG_call_site_parameter |
12932 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12933 | { |
12934 | /* Already printed the complaint above. */ | |
12935 | continue; | |
12936 | } | |
12937 | ||
12938 | gdb_assert (call_site->parameter_count < nparams); | |
12939 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12940 | ||
1788b2d3 JK |
12941 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12942 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12943 | register is contained in DW_AT_call_value. */ |
96408a79 | 12944 | |
24c5c679 | 12945 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12946 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12947 | if (origin == NULL) | |
12948 | { | |
12949 | /* This was a pre-DWARF-5 GNU extension alias | |
12950 | for DW_AT_call_parameter. */ | |
12951 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12952 | } | |
7771576e | 12953 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12954 | { |
1788b2d3 | 12955 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12956 | |
12957 | sect_offset sect_off | |
12958 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12959 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12960 | { |
12961 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12962 | binding can be done only inside one CU. Such referenced DIE | |
12963 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12964 | complaint (&symfile_complaints, | |
216f72a1 JK |
12965 | _("DW_AT_call_parameter offset is not in CU for " |
12966 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12967 | to_underlying (child_die->sect_off), |
12968 | objfile_name (objfile)); | |
d76b7dbc JK |
12969 | continue; |
12970 | } | |
9c541725 PA |
12971 | parameter->u.param_cu_off |
12972 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12973 | } |
12974 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12975 | { |
12976 | complaint (&symfile_complaints, | |
12977 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12978 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12979 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12980 | continue; |
12981 | } | |
24c5c679 | 12982 | else |
96408a79 | 12983 | { |
24c5c679 JK |
12984 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12985 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12986 | if (parameter->u.dwarf_reg != -1) | |
12987 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
12988 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
12989 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
12990 | ¶meter->u.fb_offset)) | |
12991 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
12992 | else | |
12993 | { | |
12994 | complaint (&symfile_complaints, | |
12995 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
12996 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 12997 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 12998 | "[in module %s]"), |
9c541725 PA |
12999 | to_underlying (child_die->sect_off), |
13000 | objfile_name (objfile)); | |
24c5c679 JK |
13001 | continue; |
13002 | } | |
96408a79 SA |
13003 | } |
13004 | ||
216f72a1 JK |
13005 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13006 | if (attr == NULL) | |
13007 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
13008 | if (!attr_form_is_block (attr)) |
13009 | { | |
13010 | complaint (&symfile_complaints, | |
216f72a1 JK |
13011 | _("No DW_FORM_block* DW_AT_call_value for " |
13012 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
13013 | to_underlying (child_die->sect_off), |
13014 | objfile_name (objfile)); | |
96408a79 SA |
13015 | continue; |
13016 | } | |
13017 | parameter->value = DW_BLOCK (attr)->data; | |
13018 | parameter->value_size = DW_BLOCK (attr)->size; | |
13019 | ||
13020 | /* Parameters are not pre-cleared by memset above. */ | |
13021 | parameter->data_value = NULL; | |
13022 | parameter->data_value_size = 0; | |
13023 | call_site->parameter_count++; | |
13024 | ||
216f72a1 JK |
13025 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13026 | if (attr == NULL) | |
13027 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
13028 | if (attr) |
13029 | { | |
13030 | if (!attr_form_is_block (attr)) | |
13031 | complaint (&symfile_complaints, | |
216f72a1 JK |
13032 | _("No DW_FORM_block* DW_AT_call_data_value for " |
13033 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
13034 | to_underlying (child_die->sect_off), |
13035 | objfile_name (objfile)); | |
96408a79 SA |
13036 | else |
13037 | { | |
13038 | parameter->data_value = DW_BLOCK (attr)->data; | |
13039 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
13040 | } | |
13041 | } | |
13042 | } | |
13043 | } | |
13044 | ||
71a3c369 TT |
13045 | /* Helper function for read_variable. If DIE represents a virtual |
13046 | table, then return the type of the concrete object that is | |
13047 | associated with the virtual table. Otherwise, return NULL. */ | |
13048 | ||
13049 | static struct type * | |
13050 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13051 | { | |
13052 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13053 | if (attr == NULL) | |
13054 | return NULL; | |
13055 | ||
13056 | /* Find the type DIE. */ | |
13057 | struct die_info *type_die = NULL; | |
13058 | struct dwarf2_cu *type_cu = cu; | |
13059 | ||
13060 | if (attr_form_is_ref (attr)) | |
13061 | type_die = follow_die_ref (die, attr, &type_cu); | |
13062 | if (type_die == NULL) | |
13063 | return NULL; | |
13064 | ||
13065 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13066 | return NULL; | |
13067 | return die_containing_type (type_die, type_cu); | |
13068 | } | |
13069 | ||
13070 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13071 | ||
13072 | static void | |
13073 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13074 | { | |
13075 | struct rust_vtable_symbol *storage = NULL; | |
13076 | ||
13077 | if (cu->language == language_rust) | |
13078 | { | |
13079 | struct type *containing_type = rust_containing_type (die, cu); | |
13080 | ||
13081 | if (containing_type != NULL) | |
13082 | { | |
13083 | struct objfile *objfile = cu->objfile; | |
13084 | ||
13085 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
13086 | struct rust_vtable_symbol); | |
13087 | initialize_objfile_symbol (storage); | |
13088 | storage->concrete_type = containing_type; | |
cf724bc9 | 13089 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13090 | } |
13091 | } | |
13092 | ||
13093 | new_symbol_full (die, NULL, cu, storage); | |
13094 | } | |
13095 | ||
43988095 JK |
13096 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13097 | reading .debug_rnglists. | |
13098 | Callback's type should be: | |
13099 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13100 | Return true if the attributes are present and valid, otherwise, | |
13101 | return false. */ | |
13102 | ||
13103 | template <typename Callback> | |
13104 | static bool | |
13105 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
13106 | Callback &&callback) | |
13107 | { | |
13108 | struct objfile *objfile = cu->objfile; | |
43988095 | 13109 | bfd *obfd = objfile->obfd; |
43988095 JK |
13110 | /* Base address selection entry. */ |
13111 | CORE_ADDR base; | |
13112 | int found_base; | |
43988095 | 13113 | const gdb_byte *buffer; |
43988095 JK |
13114 | CORE_ADDR baseaddr; |
13115 | bool overflow = false; | |
13116 | ||
13117 | found_base = cu->base_known; | |
13118 | base = cu->base_address; | |
13119 | ||
13120 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
13121 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
13122 | { | |
13123 | complaint (&symfile_complaints, | |
13124 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
13125 | offset); | |
13126 | return false; | |
13127 | } | |
13128 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
13129 | ||
13130 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
13131 | ||
13132 | while (1) | |
13133 | { | |
7814882a JK |
13134 | /* Initialize it due to a false compiler warning. */ |
13135 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
13136 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
13137 | + dwarf2_per_objfile->rnglists.size); | |
13138 | unsigned int bytes_read; | |
13139 | ||
13140 | if (buffer == buf_end) | |
13141 | { | |
13142 | overflow = true; | |
13143 | break; | |
13144 | } | |
13145 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13146 | switch (rlet) | |
13147 | { | |
13148 | case DW_RLE_end_of_list: | |
13149 | break; | |
13150 | case DW_RLE_base_address: | |
13151 | if (buffer + cu->header.addr_size > buf_end) | |
13152 | { | |
13153 | overflow = true; | |
13154 | break; | |
13155 | } | |
13156 | base = read_address (obfd, buffer, cu, &bytes_read); | |
13157 | found_base = 1; | |
13158 | buffer += bytes_read; | |
13159 | break; | |
13160 | case DW_RLE_start_length: | |
13161 | if (buffer + cu->header.addr_size > buf_end) | |
13162 | { | |
13163 | overflow = true; | |
13164 | break; | |
13165 | } | |
13166 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
13167 | buffer += bytes_read; | |
13168 | range_end = (range_beginning | |
13169 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13170 | buffer += bytes_read; | |
13171 | if (buffer > buf_end) | |
13172 | { | |
13173 | overflow = true; | |
13174 | break; | |
13175 | } | |
13176 | break; | |
13177 | case DW_RLE_offset_pair: | |
13178 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13179 | buffer += bytes_read; | |
13180 | if (buffer > buf_end) | |
13181 | { | |
13182 | overflow = true; | |
13183 | break; | |
13184 | } | |
13185 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13186 | buffer += bytes_read; | |
13187 | if (buffer > buf_end) | |
13188 | { | |
13189 | overflow = true; | |
13190 | break; | |
13191 | } | |
13192 | break; | |
13193 | case DW_RLE_start_end: | |
13194 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13195 | { | |
13196 | overflow = true; | |
13197 | break; | |
13198 | } | |
13199 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
13200 | buffer += bytes_read; | |
13201 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
13202 | buffer += bytes_read; | |
13203 | break; | |
13204 | default: | |
13205 | complaint (&symfile_complaints, | |
13206 | _("Invalid .debug_rnglists data (no base address)")); | |
13207 | return false; | |
13208 | } | |
13209 | if (rlet == DW_RLE_end_of_list || overflow) | |
13210 | break; | |
13211 | if (rlet == DW_RLE_base_address) | |
13212 | continue; | |
13213 | ||
13214 | if (!found_base) | |
13215 | { | |
13216 | /* We have no valid base address for the ranges | |
13217 | data. */ | |
13218 | complaint (&symfile_complaints, | |
13219 | _("Invalid .debug_rnglists data (no base address)")); | |
13220 | return false; | |
13221 | } | |
13222 | ||
13223 | if (range_beginning > range_end) | |
13224 | { | |
13225 | /* Inverted range entries are invalid. */ | |
13226 | complaint (&symfile_complaints, | |
13227 | _("Invalid .debug_rnglists data (inverted range)")); | |
13228 | return false; | |
13229 | } | |
13230 | ||
13231 | /* Empty range entries have no effect. */ | |
13232 | if (range_beginning == range_end) | |
13233 | continue; | |
13234 | ||
13235 | range_beginning += base; | |
13236 | range_end += base; | |
13237 | ||
13238 | /* A not-uncommon case of bad debug info. | |
13239 | Don't pollute the addrmap with bad data. */ | |
13240 | if (range_beginning + baseaddr == 0 | |
13241 | && !dwarf2_per_objfile->has_section_at_zero) | |
13242 | { | |
13243 | complaint (&symfile_complaints, | |
13244 | _(".debug_rnglists entry has start address of zero" | |
13245 | " [in module %s]"), objfile_name (objfile)); | |
13246 | continue; | |
13247 | } | |
13248 | ||
13249 | callback (range_beginning, range_end); | |
13250 | } | |
13251 | ||
13252 | if (overflow) | |
13253 | { | |
13254 | complaint (&symfile_complaints, | |
13255 | _("Offset %d is not terminated " | |
13256 | "for DW_AT_ranges attribute"), | |
13257 | offset); | |
13258 | return false; | |
13259 | } | |
13260 | ||
13261 | return true; | |
13262 | } | |
13263 | ||
13264 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13265 | Callback's type should be: | |
13266 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13267 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13268 | |
43988095 | 13269 | template <typename Callback> |
43039443 | 13270 | static int |
5f46c5a5 | 13271 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 13272 | Callback &&callback) |
43039443 JK |
13273 | { |
13274 | struct objfile *objfile = cu->objfile; | |
13275 | struct comp_unit_head *cu_header = &cu->header; | |
13276 | bfd *obfd = objfile->obfd; | |
13277 | unsigned int addr_size = cu_header->addr_size; | |
13278 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13279 | /* Base address selection entry. */ | |
13280 | CORE_ADDR base; | |
13281 | int found_base; | |
13282 | unsigned int dummy; | |
d521ce57 | 13283 | const gdb_byte *buffer; |
ff013f42 | 13284 | CORE_ADDR baseaddr; |
43039443 | 13285 | |
43988095 JK |
13286 | if (cu_header->version >= 5) |
13287 | return dwarf2_rnglists_process (offset, cu, callback); | |
13288 | ||
d00adf39 DE |
13289 | found_base = cu->base_known; |
13290 | base = cu->base_address; | |
43039443 | 13291 | |
be391dca | 13292 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 13293 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
13294 | { |
13295 | complaint (&symfile_complaints, | |
13296 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
13297 | offset); | |
13298 | return 0; | |
13299 | } | |
dce234bc | 13300 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 13301 | |
e7030f15 | 13302 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 13303 | |
43039443 JK |
13304 | while (1) |
13305 | { | |
13306 | CORE_ADDR range_beginning, range_end; | |
13307 | ||
13308 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
13309 | buffer += addr_size; | |
13310 | range_end = read_address (obfd, buffer, cu, &dummy); | |
13311 | buffer += addr_size; | |
13312 | offset += 2 * addr_size; | |
13313 | ||
13314 | /* An end of list marker is a pair of zero addresses. */ | |
13315 | if (range_beginning == 0 && range_end == 0) | |
13316 | /* Found the end of list entry. */ | |
13317 | break; | |
13318 | ||
13319 | /* Each base address selection entry is a pair of 2 values. | |
13320 | The first is the largest possible address, the second is | |
13321 | the base address. Check for a base address here. */ | |
13322 | if ((range_beginning & mask) == mask) | |
13323 | { | |
28d2bfb9 AB |
13324 | /* If we found the largest possible address, then we already |
13325 | have the base address in range_end. */ | |
13326 | base = range_end; | |
43039443 JK |
13327 | found_base = 1; |
13328 | continue; | |
13329 | } | |
13330 | ||
13331 | if (!found_base) | |
13332 | { | |
13333 | /* We have no valid base address for the ranges | |
13334 | data. */ | |
13335 | complaint (&symfile_complaints, | |
13336 | _("Invalid .debug_ranges data (no base address)")); | |
13337 | return 0; | |
13338 | } | |
13339 | ||
9277c30c UW |
13340 | if (range_beginning > range_end) |
13341 | { | |
13342 | /* Inverted range entries are invalid. */ | |
13343 | complaint (&symfile_complaints, | |
13344 | _("Invalid .debug_ranges data (inverted range)")); | |
13345 | return 0; | |
13346 | } | |
13347 | ||
13348 | /* Empty range entries have no effect. */ | |
13349 | if (range_beginning == range_end) | |
13350 | continue; | |
13351 | ||
43039443 JK |
13352 | range_beginning += base; |
13353 | range_end += base; | |
13354 | ||
01093045 DE |
13355 | /* A not-uncommon case of bad debug info. |
13356 | Don't pollute the addrmap with bad data. */ | |
13357 | if (range_beginning + baseaddr == 0 | |
13358 | && !dwarf2_per_objfile->has_section_at_zero) | |
13359 | { | |
13360 | complaint (&symfile_complaints, | |
13361 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 13362 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13363 | continue; |
13364 | } | |
13365 | ||
5f46c5a5 JK |
13366 | callback (range_beginning, range_end); |
13367 | } | |
13368 | ||
13369 | return 1; | |
13370 | } | |
13371 | ||
13372 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13373 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13374 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13375 | ||
13376 | static int | |
13377 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13378 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
13379 | struct partial_symtab *ranges_pst) | |
13380 | { | |
13381 | struct objfile *objfile = cu->objfile; | |
13382 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13383 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
13384 | SECT_OFF_TEXT (objfile)); | |
13385 | int low_set = 0; | |
13386 | CORE_ADDR low = 0; | |
13387 | CORE_ADDR high = 0; | |
13388 | int retval; | |
13389 | ||
13390 | retval = dwarf2_ranges_process (offset, cu, | |
13391 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13392 | { | |
9277c30c | 13393 | if (ranges_pst != NULL) |
3e29f34a MR |
13394 | { |
13395 | CORE_ADDR lowpc; | |
13396 | CORE_ADDR highpc; | |
13397 | ||
13398 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13399 | range_beginning + baseaddr); | |
13400 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13401 | range_end + baseaddr); | |
13402 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
13403 | ranges_pst); | |
13404 | } | |
ff013f42 | 13405 | |
43039443 JK |
13406 | /* FIXME: This is recording everything as a low-high |
13407 | segment of consecutive addresses. We should have a | |
13408 | data structure for discontiguous block ranges | |
13409 | instead. */ | |
13410 | if (! low_set) | |
13411 | { | |
13412 | low = range_beginning; | |
13413 | high = range_end; | |
13414 | low_set = 1; | |
13415 | } | |
13416 | else | |
13417 | { | |
13418 | if (range_beginning < low) | |
13419 | low = range_beginning; | |
13420 | if (range_end > high) | |
13421 | high = range_end; | |
13422 | } | |
5f46c5a5 JK |
13423 | }); |
13424 | if (!retval) | |
13425 | return 0; | |
43039443 JK |
13426 | |
13427 | if (! low_set) | |
13428 | /* If the first entry is an end-of-list marker, the range | |
13429 | describes an empty scope, i.e. no instructions. */ | |
13430 | return 0; | |
13431 | ||
13432 | if (low_return) | |
13433 | *low_return = low; | |
13434 | if (high_return) | |
13435 | *high_return = high; | |
13436 | return 1; | |
13437 | } | |
13438 | ||
3a2b436a JK |
13439 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13440 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13441 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13442 | |
3a2b436a | 13443 | static enum pc_bounds_kind |
af34e669 | 13444 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
13445 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
13446 | struct partial_symtab *pst) | |
c906108c SS |
13447 | { |
13448 | struct attribute *attr; | |
91da1414 | 13449 | struct attribute *attr_high; |
af34e669 DJ |
13450 | CORE_ADDR low = 0; |
13451 | CORE_ADDR high = 0; | |
e385593e | 13452 | enum pc_bounds_kind ret; |
c906108c | 13453 | |
91da1414 MW |
13454 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13455 | if (attr_high) | |
af34e669 | 13456 | { |
e142c38c | 13457 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 13458 | if (attr) |
91da1414 | 13459 | { |
31aa7e4e JB |
13460 | low = attr_value_as_address (attr); |
13461 | high = attr_value_as_address (attr_high); | |
13462 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13463 | high += low; | |
91da1414 | 13464 | } |
af34e669 DJ |
13465 | else |
13466 | /* Found high w/o low attribute. */ | |
e385593e | 13467 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13468 | |
13469 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13470 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13471 | } |
c906108c | 13472 | else |
af34e669 | 13473 | { |
e142c38c | 13474 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13475 | if (attr != NULL) |
13476 | { | |
ab435259 DE |
13477 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13478 | We take advantage of the fact that DW_AT_ranges does not appear | |
13479 | in DW_TAG_compile_unit of DWO files. */ | |
13480 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13481 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13482 | + (need_ranges_base | |
13483 | ? cu->ranges_base | |
13484 | : 0)); | |
2e3cf129 | 13485 | |
af34e669 | 13486 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13487 | .debug_ranges section. */ |
2e3cf129 | 13488 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13489 | return PC_BOUNDS_INVALID; |
43039443 | 13490 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13491 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13492 | } |
e385593e JK |
13493 | else |
13494 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13495 | } |
c906108c | 13496 | |
9373cf26 JK |
13497 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
13498 | if (high <= low) | |
e385593e | 13499 | return PC_BOUNDS_INVALID; |
c906108c SS |
13500 | |
13501 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13502 | eliminate duplicate copies of functions and vtables and such. | |
13503 | The linker will arbitrarily choose one and discard the others. | |
13504 | The AT_*_pc values for such functions refer to local labels in | |
13505 | these sections. If the section from that file was discarded, the | |
13506 | labels are not in the output, so the relocs get a value of 0. | |
13507 | If this is a discarded function, mark the pc bounds as invalid, | |
13508 | so that GDB will ignore it. */ | |
72dca2f5 | 13509 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13510 | return PC_BOUNDS_INVALID; |
c906108c SS |
13511 | |
13512 | *lowpc = low; | |
96408a79 SA |
13513 | if (highpc) |
13514 | *highpc = high; | |
af34e669 | 13515 | return ret; |
c906108c SS |
13516 | } |
13517 | ||
b084d499 JB |
13518 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13519 | its low and high PC addresses. Do nothing if these addresses could not | |
13520 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13521 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13522 | ||
13523 | static void | |
13524 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13525 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13526 | struct dwarf2_cu *cu) | |
13527 | { | |
13528 | CORE_ADDR low, high; | |
13529 | struct die_info *child = die->child; | |
13530 | ||
e385593e | 13531 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13532 | { |
325fac50 PA |
13533 | *lowpc = std::min (*lowpc, low); |
13534 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13535 | } |
13536 | ||
13537 | /* If the language does not allow nested subprograms (either inside | |
13538 | subprograms or lexical blocks), we're done. */ | |
13539 | if (cu->language != language_ada) | |
13540 | return; | |
6e70227d | 13541 | |
b084d499 JB |
13542 | /* Check all the children of the given DIE. If it contains nested |
13543 | subprograms, then check their pc bounds. Likewise, we need to | |
13544 | check lexical blocks as well, as they may also contain subprogram | |
13545 | definitions. */ | |
13546 | while (child && child->tag) | |
13547 | { | |
13548 | if (child->tag == DW_TAG_subprogram | |
13549 | || child->tag == DW_TAG_lexical_block) | |
13550 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13551 | child = sibling_die (child); | |
13552 | } | |
13553 | } | |
13554 | ||
fae299cd DC |
13555 | /* Get the low and high pc's represented by the scope DIE, and store |
13556 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13557 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13558 | ||
13559 | static void | |
13560 | get_scope_pc_bounds (struct die_info *die, | |
13561 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13562 | struct dwarf2_cu *cu) | |
13563 | { | |
13564 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13565 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13566 | CORE_ADDR current_low, current_high; | |
13567 | ||
3a2b436a | 13568 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13569 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13570 | { |
13571 | best_low = current_low; | |
13572 | best_high = current_high; | |
13573 | } | |
13574 | else | |
13575 | { | |
13576 | struct die_info *child = die->child; | |
13577 | ||
13578 | while (child && child->tag) | |
13579 | { | |
13580 | switch (child->tag) { | |
13581 | case DW_TAG_subprogram: | |
b084d499 | 13582 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13583 | break; |
13584 | case DW_TAG_namespace: | |
f55ee35c | 13585 | case DW_TAG_module: |
fae299cd DC |
13586 | /* FIXME: carlton/2004-01-16: Should we do this for |
13587 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13588 | that current GCC's always emit the DIEs corresponding | |
13589 | to definitions of methods of classes as children of a | |
13590 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13591 | the DIEs giving the declarations, which could be | |
13592 | anywhere). But I don't see any reason why the | |
13593 | standards says that they have to be there. */ | |
13594 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13595 | ||
13596 | if (current_low != ((CORE_ADDR) -1)) | |
13597 | { | |
325fac50 PA |
13598 | best_low = std::min (best_low, current_low); |
13599 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13600 | } |
13601 | break; | |
13602 | default: | |
0963b4bd | 13603 | /* Ignore. */ |
fae299cd DC |
13604 | break; |
13605 | } | |
13606 | ||
13607 | child = sibling_die (child); | |
13608 | } | |
13609 | } | |
13610 | ||
13611 | *lowpc = best_low; | |
13612 | *highpc = best_high; | |
13613 | } | |
13614 | ||
801e3a5b JB |
13615 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13616 | in DIE. */ | |
380bca97 | 13617 | |
801e3a5b JB |
13618 | static void |
13619 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
13620 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
13621 | { | |
bb5ed363 | 13622 | struct objfile *objfile = cu->objfile; |
3e29f34a | 13623 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 13624 | struct attribute *attr; |
91da1414 | 13625 | struct attribute *attr_high; |
801e3a5b | 13626 | |
91da1414 MW |
13627 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13628 | if (attr_high) | |
801e3a5b | 13629 | { |
801e3a5b JB |
13630 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
13631 | if (attr) | |
13632 | { | |
31aa7e4e JB |
13633 | CORE_ADDR low = attr_value_as_address (attr); |
13634 | CORE_ADDR high = attr_value_as_address (attr_high); | |
13635 | ||
13636 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13637 | high += low; | |
9a619af0 | 13638 | |
3e29f34a MR |
13639 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
13640 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
13641 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
13642 | } |
13643 | } | |
13644 | ||
13645 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
13646 | if (attr) | |
13647 | { | |
ab435259 DE |
13648 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13649 | We take advantage of the fact that DW_AT_ranges does not appear | |
13650 | in DW_TAG_compile_unit of DWO files. */ | |
13651 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
13652 | |
13653 | /* The value of the DW_AT_ranges attribute is the offset of the | |
13654 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
13655 | unsigned long offset = (DW_UNSND (attr) |
13656 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 13657 | const gdb_byte *buffer; |
801e3a5b JB |
13658 | |
13659 | /* For some target architectures, but not others, the | |
13660 | read_address function sign-extends the addresses it returns. | |
13661 | To recognize base address selection entries, we need a | |
13662 | mask. */ | |
13663 | unsigned int addr_size = cu->header.addr_size; | |
13664 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13665 | ||
13666 | /* The base address, to which the next pair is relative. Note | |
13667 | that this 'base' is a DWARF concept: most entries in a range | |
13668 | list are relative, to reduce the number of relocs against the | |
13669 | debugging information. This is separate from this function's | |
13670 | 'baseaddr' argument, which GDB uses to relocate debugging | |
13671 | information from a shared library based on the address at | |
13672 | which the library was loaded. */ | |
d00adf39 DE |
13673 | CORE_ADDR base = cu->base_address; |
13674 | int base_known = cu->base_known; | |
801e3a5b | 13675 | |
5f46c5a5 JK |
13676 | dwarf2_ranges_process (offset, cu, |
13677 | [&] (CORE_ADDR start, CORE_ADDR end) | |
13678 | { | |
58fdfd2c JK |
13679 | start += baseaddr; |
13680 | end += baseaddr; | |
5f46c5a5 JK |
13681 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
13682 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
13683 | record_block_range (block, start, end - 1); | |
13684 | }); | |
801e3a5b JB |
13685 | } |
13686 | } | |
13687 | ||
685b1105 JK |
13688 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
13689 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 13690 | |
685b1105 JK |
13691 | static void |
13692 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 13693 | { |
38360086 | 13694 | int major, minor; |
60d5a603 JK |
13695 | |
13696 | if (cu->producer == NULL) | |
13697 | { | |
13698 | /* For unknown compilers expect their behavior is DWARF version | |
13699 | compliant. | |
13700 | ||
13701 | GCC started to support .debug_types sections by -gdwarf-4 since | |
13702 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
13703 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
13704 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
13705 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 13706 | } |
b1ffba5a | 13707 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 13708 | { |
38360086 MW |
13709 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
13710 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 13711 | } |
5230b05a WT |
13712 | else if (producer_is_icc (cu->producer, &major, &minor)) |
13713 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
13714 | else |
13715 | { | |
13716 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
13717 | compliant. */ | |
60d5a603 JK |
13718 | } |
13719 | ||
ba919b58 | 13720 | cu->checked_producer = 1; |
685b1105 | 13721 | } |
ba919b58 | 13722 | |
685b1105 JK |
13723 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
13724 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
13725 | during 4.6.0 experimental. */ | |
13726 | ||
13727 | static int | |
13728 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
13729 | { | |
13730 | if (!cu->checked_producer) | |
13731 | check_producer (cu); | |
13732 | ||
13733 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
13734 | } |
13735 | ||
13736 | /* Return the default accessibility type if it is not overriden by | |
13737 | DW_AT_accessibility. */ | |
13738 | ||
13739 | static enum dwarf_access_attribute | |
13740 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
13741 | { | |
13742 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
13743 | { | |
13744 | /* The default DWARF 2 accessibility for members is public, the default | |
13745 | accessibility for inheritance is private. */ | |
13746 | ||
13747 | if (die->tag != DW_TAG_inheritance) | |
13748 | return DW_ACCESS_public; | |
13749 | else | |
13750 | return DW_ACCESS_private; | |
13751 | } | |
13752 | else | |
13753 | { | |
13754 | /* DWARF 3+ defines the default accessibility a different way. The same | |
13755 | rules apply now for DW_TAG_inheritance as for the members and it only | |
13756 | depends on the container kind. */ | |
13757 | ||
13758 | if (die->parent->tag == DW_TAG_class_type) | |
13759 | return DW_ACCESS_private; | |
13760 | else | |
13761 | return DW_ACCESS_public; | |
13762 | } | |
13763 | } | |
13764 | ||
74ac6d43 TT |
13765 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
13766 | offset. If the attribute was not found return 0, otherwise return | |
13767 | 1. If it was found but could not properly be handled, set *OFFSET | |
13768 | to 0. */ | |
13769 | ||
13770 | static int | |
13771 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
13772 | LONGEST *offset) | |
13773 | { | |
13774 | struct attribute *attr; | |
13775 | ||
13776 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
13777 | if (attr != NULL) | |
13778 | { | |
13779 | *offset = 0; | |
13780 | ||
13781 | /* Note that we do not check for a section offset first here. | |
13782 | This is because DW_AT_data_member_location is new in DWARF 4, | |
13783 | so if we see it, we can assume that a constant form is really | |
13784 | a constant and not a section offset. */ | |
13785 | if (attr_form_is_constant (attr)) | |
13786 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
13787 | else if (attr_form_is_section_offset (attr)) | |
13788 | dwarf2_complex_location_expr_complaint (); | |
13789 | else if (attr_form_is_block (attr)) | |
13790 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
13791 | else | |
13792 | dwarf2_complex_location_expr_complaint (); | |
13793 | ||
13794 | return 1; | |
13795 | } | |
13796 | ||
13797 | return 0; | |
13798 | } | |
13799 | ||
c906108c SS |
13800 | /* Add an aggregate field to the field list. */ |
13801 | ||
13802 | static void | |
107d2387 | 13803 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13804 | struct dwarf2_cu *cu) |
6e70227d | 13805 | { |
e7c27a73 | 13806 | struct objfile *objfile = cu->objfile; |
5e2b427d | 13807 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13808 | struct nextfield *new_field; |
13809 | struct attribute *attr; | |
13810 | struct field *fp; | |
15d034d0 | 13811 | const char *fieldname = ""; |
c906108c SS |
13812 | |
13813 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13814 | new_field = XNEW (struct nextfield); |
b8c9b27d | 13815 | make_cleanup (xfree, new_field); |
c906108c | 13816 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
13817 | |
13818 | if (die->tag == DW_TAG_inheritance) | |
13819 | { | |
13820 | new_field->next = fip->baseclasses; | |
13821 | fip->baseclasses = new_field; | |
13822 | } | |
13823 | else | |
13824 | { | |
13825 | new_field->next = fip->fields; | |
13826 | fip->fields = new_field; | |
13827 | } | |
c906108c SS |
13828 | fip->nfields++; |
13829 | ||
e142c38c | 13830 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
13831 | if (attr) |
13832 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
13833 | else |
13834 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
13835 | if (new_field->accessibility != DW_ACCESS_public) |
13836 | fip->non_public_fields = 1; | |
60d5a603 | 13837 | |
e142c38c | 13838 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
13839 | if (attr) |
13840 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
13841 | else |
13842 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
13843 | |
13844 | fp = &new_field->field; | |
a9a9bd0f | 13845 | |
e142c38c | 13846 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 13847 | { |
74ac6d43 TT |
13848 | LONGEST offset; |
13849 | ||
a9a9bd0f | 13850 | /* Data member other than a C++ static data member. */ |
6e70227d | 13851 | |
c906108c | 13852 | /* Get type of field. */ |
e7c27a73 | 13853 | fp->type = die_type (die, cu); |
c906108c | 13854 | |
d6a843b5 | 13855 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 13856 | |
c906108c | 13857 | /* Get bit size of field (zero if none). */ |
e142c38c | 13858 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
13859 | if (attr) |
13860 | { | |
13861 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
13862 | } | |
13863 | else | |
13864 | { | |
13865 | FIELD_BITSIZE (*fp) = 0; | |
13866 | } | |
13867 | ||
13868 | /* Get bit offset of field. */ | |
74ac6d43 TT |
13869 | if (handle_data_member_location (die, cu, &offset)) |
13870 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 13871 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
13872 | if (attr) |
13873 | { | |
5e2b427d | 13874 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
13875 | { |
13876 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
13877 | additional bit offset from the MSB of the containing |
13878 | anonymous object to the MSB of the field. We don't | |
13879 | have to do anything special since we don't need to | |
13880 | know the size of the anonymous object. */ | |
f41f5e61 | 13881 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
13882 | } |
13883 | else | |
13884 | { | |
13885 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
13886 | MSB of the anonymous object, subtract off the number of |
13887 | bits from the MSB of the field to the MSB of the | |
13888 | object, and then subtract off the number of bits of | |
13889 | the field itself. The result is the bit offset of | |
13890 | the LSB of the field. */ | |
c906108c SS |
13891 | int anonymous_size; |
13892 | int bit_offset = DW_UNSND (attr); | |
13893 | ||
e142c38c | 13894 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13895 | if (attr) |
13896 | { | |
13897 | /* The size of the anonymous object containing | |
13898 | the bit field is explicit, so use the | |
13899 | indicated size (in bytes). */ | |
13900 | anonymous_size = DW_UNSND (attr); | |
13901 | } | |
13902 | else | |
13903 | { | |
13904 | /* The size of the anonymous object containing | |
13905 | the bit field must be inferred from the type | |
13906 | attribute of the data member containing the | |
13907 | bit field. */ | |
13908 | anonymous_size = TYPE_LENGTH (fp->type); | |
13909 | } | |
f41f5e61 PA |
13910 | SET_FIELD_BITPOS (*fp, |
13911 | (FIELD_BITPOS (*fp) | |
13912 | + anonymous_size * bits_per_byte | |
13913 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13914 | } |
13915 | } | |
da5b30da AA |
13916 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13917 | if (attr != NULL) | |
13918 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13919 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13920 | |
13921 | /* Get name of field. */ | |
39cbfefa DJ |
13922 | fieldname = dwarf2_name (die, cu); |
13923 | if (fieldname == NULL) | |
13924 | fieldname = ""; | |
d8151005 DJ |
13925 | |
13926 | /* The name is already allocated along with this objfile, so we don't | |
13927 | need to duplicate it for the type. */ | |
13928 | fp->name = fieldname; | |
c906108c SS |
13929 | |
13930 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13931 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13932 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13933 | { |
d48cc9dd | 13934 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13935 | new_field->accessibility = DW_ACCESS_private; |
13936 | fip->non_public_fields = 1; | |
13937 | } | |
13938 | } | |
a9a9bd0f | 13939 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13940 | { |
a9a9bd0f DC |
13941 | /* C++ static member. */ |
13942 | ||
13943 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13944 | is a declaration, but all versions of G++ as of this writing | |
13945 | (so through at least 3.2.1) incorrectly generate | |
13946 | DW_TAG_variable tags. */ | |
6e70227d | 13947 | |
ff355380 | 13948 | const char *physname; |
c906108c | 13949 | |
a9a9bd0f | 13950 | /* Get name of field. */ |
39cbfefa DJ |
13951 | fieldname = dwarf2_name (die, cu); |
13952 | if (fieldname == NULL) | |
c906108c SS |
13953 | return; |
13954 | ||
254e6b9e | 13955 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13956 | if (attr |
13957 | /* Only create a symbol if this is an external value. | |
13958 | new_symbol checks this and puts the value in the global symbol | |
13959 | table, which we want. If it is not external, new_symbol | |
13960 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13961 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13962 | { |
13963 | /* A static const member, not much different than an enum as far as | |
13964 | we're concerned, except that we can support more types. */ | |
13965 | new_symbol (die, NULL, cu); | |
13966 | } | |
13967 | ||
2df3850c | 13968 | /* Get physical name. */ |
ff355380 | 13969 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13970 | |
d8151005 DJ |
13971 | /* The name is already allocated along with this objfile, so we don't |
13972 | need to duplicate it for the type. */ | |
13973 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13974 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13975 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13976 | } |
13977 | else if (die->tag == DW_TAG_inheritance) | |
13978 | { | |
74ac6d43 | 13979 | LONGEST offset; |
d4b96c9a | 13980 | |
74ac6d43 TT |
13981 | /* C++ base class field. */ |
13982 | if (handle_data_member_location (die, cu, &offset)) | |
13983 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 13984 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 13985 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
13986 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
13987 | fip->nbaseclasses++; | |
13988 | } | |
13989 | } | |
13990 | ||
98751a41 JK |
13991 | /* Add a typedef defined in the scope of the FIP's class. */ |
13992 | ||
13993 | static void | |
13994 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
13995 | struct dwarf2_cu *cu) | |
6e70227d | 13996 | { |
98751a41 | 13997 | struct typedef_field_list *new_field; |
98751a41 | 13998 | struct typedef_field *fp; |
98751a41 JK |
13999 | |
14000 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 14001 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
14002 | make_cleanup (xfree, new_field); |
14003 | ||
14004 | gdb_assert (die->tag == DW_TAG_typedef); | |
14005 | ||
14006 | fp = &new_field->field; | |
14007 | ||
14008 | /* Get name of field. */ | |
14009 | fp->name = dwarf2_name (die, cu); | |
14010 | if (fp->name == NULL) | |
14011 | return; | |
14012 | ||
14013 | fp->type = read_type_die (die, cu); | |
14014 | ||
c191a687 KS |
14015 | /* Save accessibility. */ |
14016 | enum dwarf_access_attribute accessibility; | |
14017 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
14018 | if (attr != NULL) | |
14019 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
14020 | else | |
14021 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14022 | switch (accessibility) | |
14023 | { | |
14024 | case DW_ACCESS_public: | |
14025 | /* The assumed value if neither private nor protected. */ | |
14026 | break; | |
14027 | case DW_ACCESS_private: | |
14028 | fp->is_private = 1; | |
14029 | break; | |
14030 | case DW_ACCESS_protected: | |
14031 | fp->is_protected = 1; | |
14032 | break; | |
14033 | default: | |
37534686 KS |
14034 | complaint (&symfile_complaints, |
14035 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); | |
c191a687 KS |
14036 | } |
14037 | ||
98751a41 JK |
14038 | new_field->next = fip->typedef_field_list; |
14039 | fip->typedef_field_list = new_field; | |
14040 | fip->typedef_field_list_count++; | |
14041 | } | |
14042 | ||
c906108c SS |
14043 | /* Create the vector of fields, and attach it to the type. */ |
14044 | ||
14045 | static void | |
fba45db2 | 14046 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14047 | struct dwarf2_cu *cu) |
c906108c SS |
14048 | { |
14049 | int nfields = fip->nfields; | |
14050 | ||
14051 | /* Record the field count, allocate space for the array of fields, | |
14052 | and create blank accessibility bitfields if necessary. */ | |
14053 | TYPE_NFIELDS (type) = nfields; | |
14054 | TYPE_FIELDS (type) = (struct field *) | |
14055 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
14056 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
14057 | ||
b4ba55a1 | 14058 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14059 | { |
14060 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14061 | ||
14062 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14063 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14064 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14065 | ||
14066 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14067 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14068 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14069 | ||
774b6a14 TT |
14070 | TYPE_FIELD_IGNORE_BITS (type) = |
14071 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14072 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14073 | } |
14074 | ||
14075 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14076 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 14077 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
14078 | { |
14079 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 14080 | unsigned char *pointer; |
c906108c SS |
14081 | |
14082 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14083 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14084 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
14085 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
14086 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
14087 | } | |
14088 | ||
3e43a32a MS |
14089 | /* Copy the saved-up fields into the field vector. Start from the head of |
14090 | the list, adding to the tail of the field array, so that they end up in | |
14091 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
14092 | while (nfields-- > 0) |
14093 | { | |
7d0ccb61 DJ |
14094 | struct nextfield *fieldp; |
14095 | ||
14096 | if (fip->fields) | |
14097 | { | |
14098 | fieldp = fip->fields; | |
14099 | fip->fields = fieldp->next; | |
14100 | } | |
14101 | else | |
14102 | { | |
14103 | fieldp = fip->baseclasses; | |
14104 | fip->baseclasses = fieldp->next; | |
14105 | } | |
14106 | ||
14107 | TYPE_FIELD (type, nfields) = fieldp->field; | |
14108 | switch (fieldp->accessibility) | |
c906108c | 14109 | { |
c5aa993b | 14110 | case DW_ACCESS_private: |
b4ba55a1 JB |
14111 | if (cu->language != language_ada) |
14112 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 14113 | break; |
c906108c | 14114 | |
c5aa993b | 14115 | case DW_ACCESS_protected: |
b4ba55a1 JB |
14116 | if (cu->language != language_ada) |
14117 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 14118 | break; |
c906108c | 14119 | |
c5aa993b JM |
14120 | case DW_ACCESS_public: |
14121 | break; | |
c906108c | 14122 | |
c5aa993b JM |
14123 | default: |
14124 | /* Unknown accessibility. Complain and treat it as public. */ | |
14125 | { | |
e2e0b3e5 | 14126 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 14127 | fieldp->accessibility); |
c5aa993b JM |
14128 | } |
14129 | break; | |
c906108c SS |
14130 | } |
14131 | if (nfields < fip->nbaseclasses) | |
14132 | { | |
7d0ccb61 | 14133 | switch (fieldp->virtuality) |
c906108c | 14134 | { |
c5aa993b JM |
14135 | case DW_VIRTUALITY_virtual: |
14136 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14137 | if (cu->language == language_ada) |
a73c6dcd | 14138 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
14139 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
14140 | break; | |
c906108c SS |
14141 | } |
14142 | } | |
c906108c SS |
14143 | } |
14144 | } | |
14145 | ||
7d27a96d TT |
14146 | /* Return true if this member function is a constructor, false |
14147 | otherwise. */ | |
14148 | ||
14149 | static int | |
14150 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14151 | { | |
14152 | const char *fieldname; | |
fe978cb0 | 14153 | const char *type_name; |
7d27a96d TT |
14154 | int len; |
14155 | ||
14156 | if (die->parent == NULL) | |
14157 | return 0; | |
14158 | ||
14159 | if (die->parent->tag != DW_TAG_structure_type | |
14160 | && die->parent->tag != DW_TAG_union_type | |
14161 | && die->parent->tag != DW_TAG_class_type) | |
14162 | return 0; | |
14163 | ||
14164 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14165 | type_name = dwarf2_name (die->parent, cu); |
14166 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14167 | return 0; |
14168 | ||
14169 | len = strlen (fieldname); | |
fe978cb0 PA |
14170 | return (strncmp (fieldname, type_name, len) == 0 |
14171 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14172 | } |
14173 | ||
c906108c SS |
14174 | /* Add a member function to the proper fieldlist. */ |
14175 | ||
14176 | static void | |
107d2387 | 14177 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14178 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14179 | { |
e7c27a73 | 14180 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14181 | struct attribute *attr; |
14182 | struct fnfieldlist *flp; | |
14183 | int i; | |
14184 | struct fn_field *fnp; | |
15d034d0 | 14185 | const char *fieldname; |
c906108c | 14186 | struct nextfnfield *new_fnfield; |
f792889a | 14187 | struct type *this_type; |
60d5a603 | 14188 | enum dwarf_access_attribute accessibility; |
c906108c | 14189 | |
b4ba55a1 | 14190 | if (cu->language == language_ada) |
a73c6dcd | 14191 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14192 | |
2df3850c | 14193 | /* Get name of member function. */ |
39cbfefa DJ |
14194 | fieldname = dwarf2_name (die, cu); |
14195 | if (fieldname == NULL) | |
2df3850c | 14196 | return; |
c906108c | 14197 | |
c906108c SS |
14198 | /* Look up member function name in fieldlist. */ |
14199 | for (i = 0; i < fip->nfnfields; i++) | |
14200 | { | |
27bfe10e | 14201 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
14202 | break; |
14203 | } | |
14204 | ||
14205 | /* Create new list element if necessary. */ | |
14206 | if (i < fip->nfnfields) | |
14207 | flp = &fip->fnfieldlists[i]; | |
14208 | else | |
14209 | { | |
14210 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14211 | { | |
14212 | fip->fnfieldlists = (struct fnfieldlist *) | |
14213 | xrealloc (fip->fnfieldlists, | |
14214 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14215 | * sizeof (struct fnfieldlist)); |
c906108c | 14216 | if (fip->nfnfields == 0) |
c13c43fd | 14217 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
14218 | } |
14219 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
14220 | flp->name = fieldname; | |
14221 | flp->length = 0; | |
14222 | flp->head = NULL; | |
3da10d80 | 14223 | i = fip->nfnfields++; |
c906108c SS |
14224 | } |
14225 | ||
14226 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 14227 | entry. */ |
8d749320 | 14228 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 14229 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
14230 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
14231 | new_fnfield->next = flp->head; | |
14232 | flp->head = new_fnfield; | |
14233 | flp->length++; | |
14234 | ||
14235 | /* Fill in the member function field info. */ | |
14236 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
14237 | |
14238 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14239 | if (cu->language == language_cplus) |
3da10d80 KS |
14240 | { |
14241 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
14242 | die, cu); | |
14243 | } | |
14244 | else | |
14245 | { | |
1d06ead6 | 14246 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14247 | fnp->physname = physname ? physname : ""; |
14248 | } | |
14249 | ||
c906108c | 14250 | fnp->type = alloc_type (objfile); |
f792889a DJ |
14251 | this_type = read_type_die (die, cu); |
14252 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 14253 | { |
f792889a | 14254 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 14255 | |
f792889a | 14256 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
14257 | of the method itself (TYPE_CODE_METHOD). */ |
14258 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
14259 | TYPE_TARGET_TYPE (this_type), |
14260 | TYPE_FIELDS (this_type), | |
14261 | TYPE_NFIELDS (this_type), | |
14262 | TYPE_VARARGS (this_type)); | |
c906108c SS |
14263 | |
14264 | /* Handle static member functions. | |
c5aa993b | 14265 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
14266 | member functions. G++ helps GDB by marking the first |
14267 | parameter for non-static member functions (which is the this | |
14268 | pointer) as artificial. We obtain this information from | |
14269 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 14270 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
14271 | fnp->voffset = VOFFSET_STATIC; |
14272 | } | |
14273 | else | |
e2e0b3e5 | 14274 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 14275 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
14276 | |
14277 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 14278 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 14279 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 14280 | |
3e43a32a MS |
14281 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
14282 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
14283 | |
14284 | /* Get accessibility. */ | |
e142c38c | 14285 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 14286 | if (attr) |
aead7601 | 14287 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
14288 | else |
14289 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14290 | switch (accessibility) | |
c906108c | 14291 | { |
60d5a603 JK |
14292 | case DW_ACCESS_private: |
14293 | fnp->is_private = 1; | |
14294 | break; | |
14295 | case DW_ACCESS_protected: | |
14296 | fnp->is_protected = 1; | |
14297 | break; | |
c906108c SS |
14298 | } |
14299 | ||
b02dede2 | 14300 | /* Check for artificial methods. */ |
e142c38c | 14301 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
14302 | if (attr && DW_UNSND (attr) != 0) |
14303 | fnp->is_artificial = 1; | |
14304 | ||
7d27a96d TT |
14305 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
14306 | ||
0d564a31 | 14307 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
14308 | function. For older versions of GCC, this is an offset in the |
14309 | appropriate virtual table, as specified by DW_AT_containing_type. | |
14310 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
14311 | to the object address. */ |
14312 | ||
e142c38c | 14313 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 14314 | if (attr) |
8e19ed76 | 14315 | { |
aec5aa8b | 14316 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14317 | { |
aec5aa8b TT |
14318 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14319 | { | |
14320 | /* Old-style GCC. */ | |
14321 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14322 | } | |
14323 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14324 | || (DW_BLOCK (attr)->size > 1 | |
14325 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14326 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14327 | { | |
aec5aa8b TT |
14328 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14329 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14330 | dwarf2_complex_location_expr_complaint (); | |
14331 | else | |
14332 | fnp->voffset /= cu->header.addr_size; | |
14333 | fnp->voffset += 2; | |
14334 | } | |
14335 | else | |
14336 | dwarf2_complex_location_expr_complaint (); | |
14337 | ||
14338 | if (!fnp->fcontext) | |
7e993ebf KS |
14339 | { |
14340 | /* If there is no `this' field and no DW_AT_containing_type, | |
14341 | we cannot actually find a base class context for the | |
14342 | vtable! */ | |
14343 | if (TYPE_NFIELDS (this_type) == 0 | |
14344 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14345 | { | |
14346 | complaint (&symfile_complaints, | |
14347 | _("cannot determine context for virtual member " | |
14348 | "function \"%s\" (offset %d)"), | |
9c541725 | 14349 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
14350 | } |
14351 | else | |
14352 | { | |
14353 | fnp->fcontext | |
14354 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14355 | } | |
14356 | } | |
aec5aa8b | 14357 | } |
3690dd37 | 14358 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 14359 | { |
4d3c2250 | 14360 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14361 | } |
14362 | else | |
14363 | { | |
4d3c2250 KB |
14364 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14365 | fieldname); | |
8e19ed76 | 14366 | } |
0d564a31 | 14367 | } |
d48cc9dd DJ |
14368 | else |
14369 | { | |
14370 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14371 | if (attr && DW_UNSND (attr)) | |
14372 | { | |
14373 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
14374 | complaint (&symfile_complaints, | |
3e43a32a MS |
14375 | _("Member function \"%s\" (offset %d) is virtual " |
14376 | "but the vtable offset is not specified"), | |
9c541725 | 14377 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 14378 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14379 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14380 | } | |
14381 | } | |
c906108c SS |
14382 | } |
14383 | ||
14384 | /* Create the vector of member function fields, and attach it to the type. */ | |
14385 | ||
14386 | static void | |
fba45db2 | 14387 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14388 | struct dwarf2_cu *cu) |
c906108c SS |
14389 | { |
14390 | struct fnfieldlist *flp; | |
c906108c SS |
14391 | int i; |
14392 | ||
b4ba55a1 | 14393 | if (cu->language == language_ada) |
a73c6dcd | 14394 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14395 | |
c906108c SS |
14396 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14397 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
14398 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
14399 | ||
14400 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
14401 | { | |
14402 | struct nextfnfield *nfp = flp->head; | |
14403 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
14404 | int k; | |
14405 | ||
14406 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
14407 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
14408 | fn_flp->fn_fields = (struct fn_field *) | |
14409 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
14410 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 14411 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
14412 | } |
14413 | ||
14414 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
14415 | } |
14416 | ||
1168df01 JB |
14417 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14418 | language, zero otherwise. */ | |
14419 | static int | |
14420 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14421 | { | |
14422 | static const char vptr[] = "_vptr"; | |
14423 | ||
9c37b5ae TT |
14424 | /* Look for the C++ form of the vtable. */ |
14425 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14426 | return 1; |
14427 | ||
14428 | return 0; | |
14429 | } | |
14430 | ||
c0dd20ea | 14431 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14432 | functions, with the ABI-specified layout. If TYPE describes |
14433 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14434 | |
14435 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14436 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14437 | |
0b92b5bb TT |
14438 | static void |
14439 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14440 | { |
09e2d7c7 | 14441 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14442 | |
14443 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14444 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14445 | return; | |
c0dd20ea DJ |
14446 | |
14447 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14448 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14449 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14450 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14451 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14452 | return; | |
c0dd20ea DJ |
14453 | |
14454 | /* Find the type of the method. */ | |
0b92b5bb | 14455 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14456 | if (pfn_type == NULL |
14457 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14458 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14459 | return; |
c0dd20ea DJ |
14460 | |
14461 | /* Look for the "this" argument. */ | |
14462 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14463 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14464 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14465 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14466 | return; |
c0dd20ea | 14467 | |
09e2d7c7 | 14468 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14469 | new_type = alloc_type (objfile); |
09e2d7c7 | 14470 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14471 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14472 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14473 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14474 | } |
1168df01 | 14475 | |
685b1105 | 14476 | |
c906108c | 14477 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
14478 | (definition) to create a type for the structure or union. Fill in |
14479 | the type's name and general properties; the members will not be | |
83655187 DE |
14480 | processed until process_structure_scope. A symbol table entry for |
14481 | the type will also not be done until process_structure_scope (assuming | |
14482 | the type has a name). | |
c906108c | 14483 | |
c767944b DJ |
14484 | NOTE: we need to call these functions regardless of whether or not the |
14485 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 14486 | structure or union. This gets the type entered into our set of |
83655187 | 14487 | user defined types. */ |
c906108c | 14488 | |
f792889a | 14489 | static struct type * |
134d01f1 | 14490 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14491 | { |
e7c27a73 | 14492 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14493 | struct type *type; |
14494 | struct attribute *attr; | |
15d034d0 | 14495 | const char *name; |
c906108c | 14496 | |
348e048f DE |
14497 | /* If the definition of this type lives in .debug_types, read that type. |
14498 | Don't follow DW_AT_specification though, that will take us back up | |
14499 | the chain and we want to go down. */ | |
45e58e77 | 14500 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14501 | if (attr) |
14502 | { | |
ac9ec31b | 14503 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14504 | |
ac9ec31b | 14505 | /* The type's CU may not be the same as CU. |
02142a6c | 14506 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14507 | return set_die_type (die, type, cu); |
14508 | } | |
14509 | ||
c0dd20ea | 14510 | type = alloc_type (objfile); |
c906108c | 14511 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 14512 | |
39cbfefa DJ |
14513 | name = dwarf2_name (die, cu); |
14514 | if (name != NULL) | |
c906108c | 14515 | { |
987504bb | 14516 | if (cu->language == language_cplus |
c44af4eb TT |
14517 | || cu->language == language_d |
14518 | || cu->language == language_rust) | |
63d06c5c | 14519 | { |
15d034d0 | 14520 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
14521 | |
14522 | /* dwarf2_full_name might have already finished building the DIE's | |
14523 | type. If so, there is no need to continue. */ | |
14524 | if (get_die_type (die, cu) != NULL) | |
14525 | return get_die_type (die, cu); | |
14526 | ||
14527 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
14528 | if (die->tag == DW_TAG_structure_type |
14529 | || die->tag == DW_TAG_class_type) | |
14530 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
14531 | } |
14532 | else | |
14533 | { | |
d8151005 DJ |
14534 | /* The name is already allocated along with this objfile, so |
14535 | we don't need to duplicate it for the type. */ | |
7d455152 | 14536 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
14537 | if (die->tag == DW_TAG_class_type) |
14538 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 14539 | } |
c906108c SS |
14540 | } |
14541 | ||
14542 | if (die->tag == DW_TAG_structure_type) | |
14543 | { | |
14544 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
14545 | } | |
14546 | else if (die->tag == DW_TAG_union_type) | |
14547 | { | |
14548 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
14549 | } | |
14550 | else | |
14551 | { | |
4753d33b | 14552 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
14553 | } |
14554 | ||
0cc2414c TT |
14555 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
14556 | TYPE_DECLARED_CLASS (type) = 1; | |
14557 | ||
e142c38c | 14558 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14559 | if (attr) |
14560 | { | |
155bfbd3 JB |
14561 | if (attr_form_is_constant (attr)) |
14562 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14563 | else | |
14564 | { | |
14565 | /* For the moment, dynamic type sizes are not supported | |
14566 | by GDB's struct type. The actual size is determined | |
14567 | on-demand when resolving the type of a given object, | |
14568 | so set the type's length to zero for now. Otherwise, | |
14569 | we record an expression as the length, and that expression | |
14570 | could lead to a very large value, which could eventually | |
14571 | lead to us trying to allocate that much memory when creating | |
14572 | a value of that type. */ | |
14573 | TYPE_LENGTH (type) = 0; | |
14574 | } | |
c906108c SS |
14575 | } |
14576 | else | |
14577 | { | |
14578 | TYPE_LENGTH (type) = 0; | |
14579 | } | |
14580 | ||
5230b05a | 14581 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 14582 | { |
5230b05a WT |
14583 | /* ICC<14 does not output the required DW_AT_declaration on |
14584 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 14585 | TYPE_STUB (type) = 1; |
685b1105 JK |
14586 | } |
14587 | else | |
14588 | TYPE_STUB_SUPPORTED (type) = 1; | |
14589 | ||
dc718098 | 14590 | if (die_is_declaration (die, cu)) |
876cecd0 | 14591 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
14592 | else if (attr == NULL && die->child == NULL |
14593 | && producer_is_realview (cu->producer)) | |
14594 | /* RealView does not output the required DW_AT_declaration | |
14595 | on incomplete types. */ | |
14596 | TYPE_STUB (type) = 1; | |
dc718098 | 14597 | |
c906108c SS |
14598 | /* We need to add the type field to the die immediately so we don't |
14599 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 14600 | type within the structure itself. */ |
1c379e20 | 14601 | set_die_type (die, type, cu); |
c906108c | 14602 | |
7e314c57 JK |
14603 | /* set_die_type should be already done. */ |
14604 | set_descriptive_type (type, die, cu); | |
14605 | ||
c767944b DJ |
14606 | return type; |
14607 | } | |
14608 | ||
14609 | /* Finish creating a structure or union type, including filling in | |
14610 | its members and creating a symbol for it. */ | |
14611 | ||
14612 | static void | |
14613 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14614 | { | |
14615 | struct objfile *objfile = cu->objfile; | |
ca040673 | 14616 | struct die_info *child_die; |
c767944b DJ |
14617 | struct type *type; |
14618 | ||
14619 | type = get_die_type (die, cu); | |
14620 | if (type == NULL) | |
14621 | type = read_structure_type (die, cu); | |
14622 | ||
e142c38c | 14623 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
14624 | { |
14625 | struct field_info fi; | |
2f4732b0 | 14626 | std::vector<struct symbol *> template_args; |
c767944b | 14627 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
14628 | |
14629 | memset (&fi, 0, sizeof (struct field_info)); | |
14630 | ||
639d11d3 | 14631 | child_die = die->child; |
c906108c SS |
14632 | |
14633 | while (child_die && child_die->tag) | |
14634 | { | |
a9a9bd0f DC |
14635 | if (child_die->tag == DW_TAG_member |
14636 | || child_die->tag == DW_TAG_variable) | |
c906108c | 14637 | { |
a9a9bd0f DC |
14638 | /* NOTE: carlton/2002-11-05: A C++ static data member |
14639 | should be a DW_TAG_member that is a declaration, but | |
14640 | all versions of G++ as of this writing (so through at | |
14641 | least 3.2.1) incorrectly generate DW_TAG_variable | |
14642 | tags for them instead. */ | |
e7c27a73 | 14643 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14644 | } |
8713b1b1 | 14645 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 14646 | { |
e98c9e7c TT |
14647 | /* Rust doesn't have member functions in the C++ sense. |
14648 | However, it does emit ordinary functions as children | |
14649 | of a struct DIE. */ | |
14650 | if (cu->language == language_rust) | |
14651 | read_func_scope (child_die, cu); | |
14652 | else | |
14653 | { | |
14654 | /* C++ member function. */ | |
14655 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
14656 | } | |
c906108c SS |
14657 | } |
14658 | else if (child_die->tag == DW_TAG_inheritance) | |
14659 | { | |
14660 | /* C++ base class field. */ | |
e7c27a73 | 14661 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14662 | } |
98751a41 JK |
14663 | else if (child_die->tag == DW_TAG_typedef) |
14664 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
14665 | else if (child_die->tag == DW_TAG_template_type_param |
14666 | || child_die->tag == DW_TAG_template_value_param) | |
14667 | { | |
14668 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
14669 | ||
f1078f66 | 14670 | if (arg != NULL) |
2f4732b0 | 14671 | template_args.push_back (arg); |
34eaf542 TT |
14672 | } |
14673 | ||
c906108c SS |
14674 | child_die = sibling_die (child_die); |
14675 | } | |
14676 | ||
34eaf542 | 14677 | /* Attach template arguments to type. */ |
2f4732b0 | 14678 | if (!template_args.empty ()) |
34eaf542 TT |
14679 | { |
14680 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
2f4732b0 | 14681 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 14682 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
14683 | = XOBNEWVEC (&objfile->objfile_obstack, |
14684 | struct symbol *, | |
14685 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 14686 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 14687 | template_args.data (), |
34eaf542 TT |
14688 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
14689 | * sizeof (struct symbol *))); | |
34eaf542 TT |
14690 | } |
14691 | ||
c906108c SS |
14692 | /* Attach fields and member functions to the type. */ |
14693 | if (fi.nfields) | |
e7c27a73 | 14694 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
14695 | if (fi.nfnfields) |
14696 | { | |
e7c27a73 | 14697 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 14698 | |
c5aa993b | 14699 | /* Get the type which refers to the base class (possibly this |
c906108c | 14700 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
14701 | class from the DW_AT_containing_type attribute. This use of |
14702 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 14703 | |
e142c38c | 14704 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 14705 | { |
e7c27a73 | 14706 | struct type *t = die_containing_type (die, cu); |
c906108c | 14707 | |
ae6ae975 | 14708 | set_type_vptr_basetype (type, t); |
c906108c SS |
14709 | if (type == t) |
14710 | { | |
c906108c SS |
14711 | int i; |
14712 | ||
14713 | /* Our own class provides vtbl ptr. */ | |
14714 | for (i = TYPE_NFIELDS (t) - 1; | |
14715 | i >= TYPE_N_BASECLASSES (t); | |
14716 | --i) | |
14717 | { | |
0d5cff50 | 14718 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 14719 | |
1168df01 | 14720 | if (is_vtable_name (fieldname, cu)) |
c906108c | 14721 | { |
ae6ae975 | 14722 | set_type_vptr_fieldno (type, i); |
c906108c SS |
14723 | break; |
14724 | } | |
14725 | } | |
14726 | ||
14727 | /* Complain if virtual function table field not found. */ | |
14728 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 14729 | complaint (&symfile_complaints, |
3e43a32a MS |
14730 | _("virtual function table pointer " |
14731 | "not found when defining class '%s'"), | |
4d3c2250 KB |
14732 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
14733 | ""); | |
c906108c SS |
14734 | } |
14735 | else | |
14736 | { | |
ae6ae975 | 14737 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
14738 | } |
14739 | } | |
f6235d4c | 14740 | else if (cu->producer |
61012eef | 14741 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
14742 | { |
14743 | /* The IBM XLC compiler does not provide direct indication | |
14744 | of the containing type, but the vtable pointer is | |
14745 | always named __vfp. */ | |
14746 | ||
14747 | int i; | |
14748 | ||
14749 | for (i = TYPE_NFIELDS (type) - 1; | |
14750 | i >= TYPE_N_BASECLASSES (type); | |
14751 | --i) | |
14752 | { | |
14753 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
14754 | { | |
ae6ae975 DE |
14755 | set_type_vptr_fieldno (type, i); |
14756 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
14757 | break; |
14758 | } | |
14759 | } | |
14760 | } | |
c906108c | 14761 | } |
98751a41 JK |
14762 | |
14763 | /* Copy fi.typedef_field_list linked list elements content into the | |
14764 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
14765 | if (fi.typedef_field_list) | |
14766 | { | |
14767 | int i = fi.typedef_field_list_count; | |
14768 | ||
a0d7a4ff | 14769 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 14770 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
14771 | = ((struct typedef_field *) |
14772 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
14773 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
14774 | ||
14775 | /* Reverse the list order to keep the debug info elements order. */ | |
14776 | while (--i >= 0) | |
14777 | { | |
14778 | struct typedef_field *dest, *src; | |
6e70227d | 14779 | |
98751a41 JK |
14780 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
14781 | src = &fi.typedef_field_list->field; | |
14782 | fi.typedef_field_list = fi.typedef_field_list->next; | |
14783 | *dest = *src; | |
14784 | } | |
14785 | } | |
c767944b DJ |
14786 | |
14787 | do_cleanups (back_to); | |
c906108c | 14788 | } |
63d06c5c | 14789 | |
bb5ed363 | 14790 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 14791 | |
90aeadfc DC |
14792 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
14793 | snapshots) has been known to create a die giving a declaration | |
14794 | for a class that has, as a child, a die giving a definition for a | |
14795 | nested class. So we have to process our children even if the | |
14796 | current die is a declaration. Normally, of course, a declaration | |
14797 | won't have any children at all. */ | |
134d01f1 | 14798 | |
ca040673 DE |
14799 | child_die = die->child; |
14800 | ||
90aeadfc DC |
14801 | while (child_die != NULL && child_die->tag) |
14802 | { | |
14803 | if (child_die->tag == DW_TAG_member | |
14804 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
14805 | || child_die->tag == DW_TAG_inheritance |
14806 | || child_die->tag == DW_TAG_template_value_param | |
14807 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 14808 | { |
90aeadfc | 14809 | /* Do nothing. */ |
134d01f1 | 14810 | } |
90aeadfc DC |
14811 | else |
14812 | process_die (child_die, cu); | |
134d01f1 | 14813 | |
90aeadfc | 14814 | child_die = sibling_die (child_die); |
134d01f1 DJ |
14815 | } |
14816 | ||
fa4028e9 JB |
14817 | /* Do not consider external references. According to the DWARF standard, |
14818 | these DIEs are identified by the fact that they have no byte_size | |
14819 | attribute, and a declaration attribute. */ | |
14820 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
14821 | || !die_is_declaration (die, cu)) | |
c767944b | 14822 | new_symbol (die, type, cu); |
134d01f1 DJ |
14823 | } |
14824 | ||
55426c9d JB |
14825 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
14826 | update TYPE using some information only available in DIE's children. */ | |
14827 | ||
14828 | static void | |
14829 | update_enumeration_type_from_children (struct die_info *die, | |
14830 | struct type *type, | |
14831 | struct dwarf2_cu *cu) | |
14832 | { | |
60f7655a | 14833 | struct die_info *child_die; |
55426c9d JB |
14834 | int unsigned_enum = 1; |
14835 | int flag_enum = 1; | |
14836 | ULONGEST mask = 0; | |
55426c9d | 14837 | |
8268c778 | 14838 | auto_obstack obstack; |
55426c9d | 14839 | |
60f7655a DE |
14840 | for (child_die = die->child; |
14841 | child_die != NULL && child_die->tag; | |
14842 | child_die = sibling_die (child_die)) | |
55426c9d JB |
14843 | { |
14844 | struct attribute *attr; | |
14845 | LONGEST value; | |
14846 | const gdb_byte *bytes; | |
14847 | struct dwarf2_locexpr_baton *baton; | |
14848 | const char *name; | |
60f7655a | 14849 | |
55426c9d JB |
14850 | if (child_die->tag != DW_TAG_enumerator) |
14851 | continue; | |
14852 | ||
14853 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
14854 | if (attr == NULL) | |
14855 | continue; | |
14856 | ||
14857 | name = dwarf2_name (child_die, cu); | |
14858 | if (name == NULL) | |
14859 | name = "<anonymous enumerator>"; | |
14860 | ||
14861 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
14862 | &value, &bytes, &baton); | |
14863 | if (value < 0) | |
14864 | { | |
14865 | unsigned_enum = 0; | |
14866 | flag_enum = 0; | |
14867 | } | |
14868 | else if ((mask & value) != 0) | |
14869 | flag_enum = 0; | |
14870 | else | |
14871 | mask |= value; | |
14872 | ||
14873 | /* If we already know that the enum type is neither unsigned, nor | |
14874 | a flag type, no need to look at the rest of the enumerates. */ | |
14875 | if (!unsigned_enum && !flag_enum) | |
14876 | break; | |
55426c9d JB |
14877 | } |
14878 | ||
14879 | if (unsigned_enum) | |
14880 | TYPE_UNSIGNED (type) = 1; | |
14881 | if (flag_enum) | |
14882 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
14883 | } |
14884 | ||
134d01f1 DJ |
14885 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
14886 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 14887 | |
f792889a | 14888 | static struct type * |
134d01f1 | 14889 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14890 | { |
e7c27a73 | 14891 | struct objfile *objfile = cu->objfile; |
c906108c | 14892 | struct type *type; |
c906108c | 14893 | struct attribute *attr; |
0114d602 | 14894 | const char *name; |
134d01f1 | 14895 | |
348e048f DE |
14896 | /* If the definition of this type lives in .debug_types, read that type. |
14897 | Don't follow DW_AT_specification though, that will take us back up | |
14898 | the chain and we want to go down. */ | |
45e58e77 | 14899 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14900 | if (attr) |
14901 | { | |
ac9ec31b | 14902 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14903 | |
ac9ec31b | 14904 | /* The type's CU may not be the same as CU. |
02142a6c | 14905 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14906 | return set_die_type (die, type, cu); |
14907 | } | |
14908 | ||
c906108c SS |
14909 | type = alloc_type (objfile); |
14910 | ||
14911 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14912 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14913 | if (name != NULL) |
7d455152 | 14914 | TYPE_TAG_NAME (type) = name; |
c906108c | 14915 | |
0626fc76 TT |
14916 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14917 | if (attr != NULL) | |
14918 | { | |
14919 | struct type *underlying_type = die_type (die, cu); | |
14920 | ||
14921 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14922 | } | |
14923 | ||
e142c38c | 14924 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14925 | if (attr) |
14926 | { | |
14927 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14928 | } | |
14929 | else | |
14930 | { | |
14931 | TYPE_LENGTH (type) = 0; | |
14932 | } | |
14933 | ||
137033e9 JB |
14934 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14935 | declared as private in the package spec, and then defined only | |
14936 | inside the package body. Such types are known as Taft Amendment | |
14937 | Types. When another package uses such a type, an incomplete DIE | |
14938 | may be generated by the compiler. */ | |
02eb380e | 14939 | if (die_is_declaration (die, cu)) |
876cecd0 | 14940 | TYPE_STUB (type) = 1; |
02eb380e | 14941 | |
0626fc76 TT |
14942 | /* Finish the creation of this type by using the enum's children. |
14943 | We must call this even when the underlying type has been provided | |
14944 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14945 | update_enumeration_type_from_children (die, type, cu); |
14946 | ||
0626fc76 TT |
14947 | /* If this type has an underlying type that is not a stub, then we |
14948 | may use its attributes. We always use the "unsigned" attribute | |
14949 | in this situation, because ordinarily we guess whether the type | |
14950 | is unsigned -- but the guess can be wrong and the underlying type | |
14951 | can tell us the reality. However, we defer to a local size | |
14952 | attribute if one exists, because this lets the compiler override | |
14953 | the underlying type if needed. */ | |
14954 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14955 | { | |
14956 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14957 | if (TYPE_LENGTH (type) == 0) | |
14958 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14959 | } | |
14960 | ||
3d567982 TT |
14961 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14962 | ||
f792889a | 14963 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14964 | } |
14965 | ||
14966 | /* Given a pointer to a die which begins an enumeration, process all | |
14967 | the dies that define the members of the enumeration, and create the | |
14968 | symbol for the enumeration type. | |
14969 | ||
14970 | NOTE: We reverse the order of the element list. */ | |
14971 | ||
14972 | static void | |
14973 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14974 | { | |
f792889a | 14975 | struct type *this_type; |
134d01f1 | 14976 | |
f792889a DJ |
14977 | this_type = get_die_type (die, cu); |
14978 | if (this_type == NULL) | |
14979 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 14980 | |
639d11d3 | 14981 | if (die->child != NULL) |
c906108c | 14982 | { |
9dc481d3 DE |
14983 | struct die_info *child_die; |
14984 | struct symbol *sym; | |
14985 | struct field *fields = NULL; | |
14986 | int num_fields = 0; | |
15d034d0 | 14987 | const char *name; |
9dc481d3 | 14988 | |
639d11d3 | 14989 | child_die = die->child; |
c906108c SS |
14990 | while (child_die && child_die->tag) |
14991 | { | |
14992 | if (child_die->tag != DW_TAG_enumerator) | |
14993 | { | |
e7c27a73 | 14994 | process_die (child_die, cu); |
c906108c SS |
14995 | } |
14996 | else | |
14997 | { | |
39cbfefa DJ |
14998 | name = dwarf2_name (child_die, cu); |
14999 | if (name) | |
c906108c | 15000 | { |
f792889a | 15001 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
15002 | |
15003 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
15004 | { | |
15005 | fields = (struct field *) | |
15006 | xrealloc (fields, | |
15007 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 15008 | * sizeof (struct field)); |
c906108c SS |
15009 | } |
15010 | ||
3567439c | 15011 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 15012 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 15013 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
15014 | FIELD_BITSIZE (fields[num_fields]) = 0; |
15015 | ||
15016 | num_fields++; | |
15017 | } | |
15018 | } | |
15019 | ||
15020 | child_die = sibling_die (child_die); | |
15021 | } | |
15022 | ||
15023 | if (num_fields) | |
15024 | { | |
f792889a DJ |
15025 | TYPE_NFIELDS (this_type) = num_fields; |
15026 | TYPE_FIELDS (this_type) = (struct field *) | |
15027 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
15028 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 15029 | sizeof (struct field) * num_fields); |
b8c9b27d | 15030 | xfree (fields); |
c906108c | 15031 | } |
c906108c | 15032 | } |
134d01f1 | 15033 | |
6c83ed52 TT |
15034 | /* If we are reading an enum from a .debug_types unit, and the enum |
15035 | is a declaration, and the enum is not the signatured type in the | |
15036 | unit, then we do not want to add a symbol for it. Adding a | |
15037 | symbol would in some cases obscure the true definition of the | |
15038 | enum, giving users an incomplete type when the definition is | |
15039 | actually available. Note that we do not want to do this for all | |
15040 | enums which are just declarations, because C++0x allows forward | |
15041 | enum declarations. */ | |
3019eac3 | 15042 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
15043 | && die_is_declaration (die, cu)) |
15044 | { | |
52dc124a | 15045 | struct signatured_type *sig_type; |
6c83ed52 | 15046 | |
c0f78cd4 | 15047 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
15048 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
15049 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
15050 | return; |
15051 | } | |
15052 | ||
f792889a | 15053 | new_symbol (die, this_type, cu); |
c906108c SS |
15054 | } |
15055 | ||
15056 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
15057 | the DIE's type field. For now, this only handles one dimensional | |
15058 | arrays. */ | |
15059 | ||
f792889a | 15060 | static struct type * |
e7c27a73 | 15061 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15062 | { |
e7c27a73 | 15063 | struct objfile *objfile = cu->objfile; |
c906108c | 15064 | struct die_info *child_die; |
7e314c57 | 15065 | struct type *type; |
c906108c | 15066 | struct type *element_type, *range_type, *index_type; |
c906108c | 15067 | struct attribute *attr; |
15d034d0 | 15068 | const char *name; |
dc53a7ad | 15069 | unsigned int bit_stride = 0; |
c906108c | 15070 | |
e7c27a73 | 15071 | element_type = die_type (die, cu); |
c906108c | 15072 | |
7e314c57 JK |
15073 | /* The die_type call above may have already set the type for this DIE. */ |
15074 | type = get_die_type (die, cu); | |
15075 | if (type) | |
15076 | return type; | |
15077 | ||
dc53a7ad JB |
15078 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
15079 | if (attr != NULL) | |
15080 | bit_stride = DW_UNSND (attr) * 8; | |
15081 | ||
15082 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
15083 | if (attr != NULL) | |
15084 | bit_stride = DW_UNSND (attr); | |
15085 | ||
c906108c SS |
15086 | /* Irix 6.2 native cc creates array types without children for |
15087 | arrays with unspecified length. */ | |
639d11d3 | 15088 | if (die->child == NULL) |
c906108c | 15089 | { |
46bf5051 | 15090 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15091 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
15092 | type = create_array_type_with_stride (NULL, element_type, range_type, |
15093 | bit_stride); | |
f792889a | 15094 | return set_die_type (die, type, cu); |
c906108c SS |
15095 | } |
15096 | ||
791afaa2 | 15097 | std::vector<struct type *> range_types; |
639d11d3 | 15098 | child_die = die->child; |
c906108c SS |
15099 | while (child_die && child_die->tag) |
15100 | { | |
15101 | if (child_die->tag == DW_TAG_subrange_type) | |
15102 | { | |
f792889a | 15103 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 15104 | |
f792889a | 15105 | if (child_type != NULL) |
a02abb62 | 15106 | { |
0963b4bd MS |
15107 | /* The range type was succesfully read. Save it for the |
15108 | array type creation. */ | |
791afaa2 | 15109 | range_types.push_back (child_type); |
a02abb62 | 15110 | } |
c906108c SS |
15111 | } |
15112 | child_die = sibling_die (child_die); | |
15113 | } | |
15114 | ||
15115 | /* Dwarf2 dimensions are output from left to right, create the | |
15116 | necessary array types in backwards order. */ | |
7ca2d3a3 | 15117 | |
c906108c | 15118 | type = element_type; |
7ca2d3a3 DL |
15119 | |
15120 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
15121 | { | |
15122 | int i = 0; | |
9a619af0 | 15123 | |
791afaa2 | 15124 | while (i < range_types.size ()) |
dc53a7ad JB |
15125 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
15126 | bit_stride); | |
7ca2d3a3 DL |
15127 | } |
15128 | else | |
15129 | { | |
791afaa2 | 15130 | size_t ndim = range_types.size (); |
7ca2d3a3 | 15131 | while (ndim-- > 0) |
dc53a7ad JB |
15132 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
15133 | bit_stride); | |
7ca2d3a3 | 15134 | } |
c906108c | 15135 | |
f5f8a009 EZ |
15136 | /* Understand Dwarf2 support for vector types (like they occur on |
15137 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
15138 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
15139 | custom vendor extension. The main difference between a regular | |
15140 | array and the vector variant is that vectors are passed by value | |
15141 | to functions. */ | |
e142c38c | 15142 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 15143 | if (attr) |
ea37ba09 | 15144 | make_vector_type (type); |
f5f8a009 | 15145 | |
dbc98a8b KW |
15146 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
15147 | implementation may choose to implement triple vectors using this | |
15148 | attribute. */ | |
15149 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
15150 | if (attr) | |
15151 | { | |
15152 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
15153 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15154 | else | |
3e43a32a MS |
15155 | complaint (&symfile_complaints, |
15156 | _("DW_AT_byte_size for array type smaller " | |
15157 | "than the total size of elements")); | |
dbc98a8b KW |
15158 | } |
15159 | ||
39cbfefa DJ |
15160 | name = dwarf2_name (die, cu); |
15161 | if (name) | |
15162 | TYPE_NAME (type) = name; | |
6e70227d | 15163 | |
0963b4bd | 15164 | /* Install the type in the die. */ |
7e314c57 JK |
15165 | set_die_type (die, type, cu); |
15166 | ||
15167 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15168 | set_descriptive_type (type, die, cu); |
15169 | ||
7e314c57 | 15170 | return type; |
c906108c SS |
15171 | } |
15172 | ||
7ca2d3a3 | 15173 | static enum dwarf_array_dim_ordering |
6e70227d | 15174 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
15175 | { |
15176 | struct attribute *attr; | |
15177 | ||
15178 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
15179 | ||
aead7601 SM |
15180 | if (attr) |
15181 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 15182 | |
0963b4bd MS |
15183 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
15184 | opposite order to the dwarf2 specification, but data is still | |
15185 | laid out as per normal fortran. | |
7ca2d3a3 | 15186 | |
0963b4bd MS |
15187 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
15188 | version checking. */ | |
7ca2d3a3 | 15189 | |
905e0470 PM |
15190 | if (cu->language == language_fortran |
15191 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
15192 | { |
15193 | return DW_ORD_row_major; | |
15194 | } | |
15195 | ||
6e70227d | 15196 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
15197 | { |
15198 | case array_column_major: | |
15199 | return DW_ORD_col_major; | |
15200 | case array_row_major: | |
15201 | default: | |
15202 | return DW_ORD_row_major; | |
15203 | }; | |
15204 | } | |
15205 | ||
72019c9c | 15206 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 15207 | the DIE's type field. */ |
72019c9c | 15208 | |
f792889a | 15209 | static struct type * |
72019c9c GM |
15210 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
15211 | { | |
7e314c57 JK |
15212 | struct type *domain_type, *set_type; |
15213 | struct attribute *attr; | |
f792889a | 15214 | |
7e314c57 JK |
15215 | domain_type = die_type (die, cu); |
15216 | ||
15217 | /* The die_type call above may have already set the type for this DIE. */ | |
15218 | set_type = get_die_type (die, cu); | |
15219 | if (set_type) | |
15220 | return set_type; | |
15221 | ||
15222 | set_type = create_set_type (NULL, domain_type); | |
15223 | ||
15224 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
15225 | if (attr) |
15226 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 15227 | |
f792889a | 15228 | return set_die_type (die, set_type, cu); |
72019c9c | 15229 | } |
7ca2d3a3 | 15230 | |
0971de02 TT |
15231 | /* A helper for read_common_block that creates a locexpr baton. |
15232 | SYM is the symbol which we are marking as computed. | |
15233 | COMMON_DIE is the DIE for the common block. | |
15234 | COMMON_LOC is the location expression attribute for the common | |
15235 | block itself. | |
15236 | MEMBER_LOC is the location expression attribute for the particular | |
15237 | member of the common block that we are processing. | |
15238 | CU is the CU from which the above come. */ | |
15239 | ||
15240 | static void | |
15241 | mark_common_block_symbol_computed (struct symbol *sym, | |
15242 | struct die_info *common_die, | |
15243 | struct attribute *common_loc, | |
15244 | struct attribute *member_loc, | |
15245 | struct dwarf2_cu *cu) | |
15246 | { | |
15247 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
15248 | struct dwarf2_locexpr_baton *baton; | |
15249 | gdb_byte *ptr; | |
15250 | unsigned int cu_off; | |
15251 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
15252 | LONGEST offset = 0; | |
15253 | ||
15254 | gdb_assert (common_loc && member_loc); | |
15255 | gdb_assert (attr_form_is_block (common_loc)); | |
15256 | gdb_assert (attr_form_is_block (member_loc) | |
15257 | || attr_form_is_constant (member_loc)); | |
15258 | ||
8d749320 | 15259 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
15260 | baton->per_cu = cu->per_cu; |
15261 | gdb_assert (baton->per_cu); | |
15262 | ||
15263 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
15264 | ||
15265 | if (attr_form_is_constant (member_loc)) | |
15266 | { | |
15267 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
15268 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
15269 | } | |
15270 | else | |
15271 | baton->size += DW_BLOCK (member_loc)->size; | |
15272 | ||
224c3ddb | 15273 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
15274 | baton->data = ptr; |
15275 | ||
15276 | *ptr++ = DW_OP_call4; | |
9c541725 | 15277 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
15278 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
15279 | ptr += 4; | |
15280 | ||
15281 | if (attr_form_is_constant (member_loc)) | |
15282 | { | |
15283 | *ptr++ = DW_OP_addr; | |
15284 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
15285 | ptr += cu->header.addr_size; | |
15286 | } | |
15287 | else | |
15288 | { | |
15289 | /* We have to copy the data here, because DW_OP_call4 will only | |
15290 | use a DW_AT_location attribute. */ | |
15291 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
15292 | ptr += DW_BLOCK (member_loc)->size; | |
15293 | } | |
15294 | ||
15295 | *ptr++ = DW_OP_plus; | |
15296 | gdb_assert (ptr - baton->data == baton->size); | |
15297 | ||
0971de02 | 15298 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 15299 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
15300 | } |
15301 | ||
4357ac6c TT |
15302 | /* Create appropriate locally-scoped variables for all the |
15303 | DW_TAG_common_block entries. Also create a struct common_block | |
15304 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
15305 | is used to sepate the common blocks name namespace from regular | |
15306 | variable names. */ | |
c906108c SS |
15307 | |
15308 | static void | |
e7c27a73 | 15309 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15310 | { |
0971de02 TT |
15311 | struct attribute *attr; |
15312 | ||
15313 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
15314 | if (attr) | |
15315 | { | |
15316 | /* Support the .debug_loc offsets. */ | |
15317 | if (attr_form_is_block (attr)) | |
15318 | { | |
15319 | /* Ok. */ | |
15320 | } | |
15321 | else if (attr_form_is_section_offset (attr)) | |
15322 | { | |
15323 | dwarf2_complex_location_expr_complaint (); | |
15324 | attr = NULL; | |
15325 | } | |
15326 | else | |
15327 | { | |
15328 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15329 | "common block member"); | |
15330 | attr = NULL; | |
15331 | } | |
15332 | } | |
15333 | ||
639d11d3 | 15334 | if (die->child != NULL) |
c906108c | 15335 | { |
4357ac6c TT |
15336 | struct objfile *objfile = cu->objfile; |
15337 | struct die_info *child_die; | |
15338 | size_t n_entries = 0, size; | |
15339 | struct common_block *common_block; | |
15340 | struct symbol *sym; | |
74ac6d43 | 15341 | |
4357ac6c TT |
15342 | for (child_die = die->child; |
15343 | child_die && child_die->tag; | |
15344 | child_die = sibling_die (child_die)) | |
15345 | ++n_entries; | |
15346 | ||
15347 | size = (sizeof (struct common_block) | |
15348 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
15349 | common_block |
15350 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
15351 | size); | |
4357ac6c TT |
15352 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
15353 | common_block->n_entries = 0; | |
15354 | ||
15355 | for (child_die = die->child; | |
15356 | child_die && child_die->tag; | |
15357 | child_die = sibling_die (child_die)) | |
15358 | { | |
15359 | /* Create the symbol in the DW_TAG_common_block block in the current | |
15360 | symbol scope. */ | |
e7c27a73 | 15361 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
15362 | if (sym != NULL) |
15363 | { | |
15364 | struct attribute *member_loc; | |
15365 | ||
15366 | common_block->contents[common_block->n_entries++] = sym; | |
15367 | ||
15368 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
15369 | cu); | |
15370 | if (member_loc) | |
15371 | { | |
15372 | /* GDB has handled this for a long time, but it is | |
15373 | not specified by DWARF. It seems to have been | |
15374 | emitted by gfortran at least as recently as: | |
15375 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
15376 | complaint (&symfile_complaints, | |
15377 | _("Variable in common block has " | |
15378 | "DW_AT_data_member_location " | |
15379 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15380 | to_underlying (child_die->sect_off), |
4262abfb | 15381 | objfile_name (cu->objfile)); |
0971de02 TT |
15382 | |
15383 | if (attr_form_is_section_offset (member_loc)) | |
15384 | dwarf2_complex_location_expr_complaint (); | |
15385 | else if (attr_form_is_constant (member_loc) | |
15386 | || attr_form_is_block (member_loc)) | |
15387 | { | |
15388 | if (attr) | |
15389 | mark_common_block_symbol_computed (sym, die, attr, | |
15390 | member_loc, cu); | |
15391 | } | |
15392 | else | |
15393 | dwarf2_complex_location_expr_complaint (); | |
15394 | } | |
15395 | } | |
c906108c | 15396 | } |
4357ac6c TT |
15397 | |
15398 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
15399 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
15400 | } |
15401 | } | |
15402 | ||
0114d602 | 15403 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 15404 | |
0114d602 DJ |
15405 | static struct type * |
15406 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 15407 | { |
e7c27a73 | 15408 | struct objfile *objfile = cu->objfile; |
0114d602 | 15409 | const char *previous_prefix, *name; |
9219021c | 15410 | int is_anonymous; |
0114d602 DJ |
15411 | struct type *type; |
15412 | ||
15413 | /* For extensions, reuse the type of the original namespace. */ | |
15414 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
15415 | { | |
15416 | struct die_info *ext_die; | |
15417 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 15418 | |
0114d602 DJ |
15419 | ext_die = dwarf2_extension (die, &ext_cu); |
15420 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
15421 | |
15422 | /* EXT_CU may not be the same as CU. | |
02142a6c | 15423 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
15424 | return set_die_type (die, type, cu); |
15425 | } | |
9219021c | 15426 | |
e142c38c | 15427 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
15428 | |
15429 | /* Now build the name of the current namespace. */ | |
15430 | ||
0114d602 DJ |
15431 | previous_prefix = determine_prefix (die, cu); |
15432 | if (previous_prefix[0] != '\0') | |
15433 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 15434 | previous_prefix, name, 0, cu); |
0114d602 DJ |
15435 | |
15436 | /* Create the type. */ | |
19f392bc | 15437 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
15438 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
15439 | ||
60531b24 | 15440 | return set_die_type (die, type, cu); |
0114d602 DJ |
15441 | } |
15442 | ||
22cee43f | 15443 | /* Read a namespace scope. */ |
0114d602 DJ |
15444 | |
15445 | static void | |
15446 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
15447 | { | |
15448 | struct objfile *objfile = cu->objfile; | |
0114d602 | 15449 | int is_anonymous; |
9219021c | 15450 | |
5c4e30ca DC |
15451 | /* Add a symbol associated to this if we haven't seen the namespace |
15452 | before. Also, add a using directive if it's an anonymous | |
15453 | namespace. */ | |
9219021c | 15454 | |
f2f0e013 | 15455 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
15456 | { |
15457 | struct type *type; | |
15458 | ||
0114d602 | 15459 | type = read_type_die (die, cu); |
e7c27a73 | 15460 | new_symbol (die, type, cu); |
5c4e30ca | 15461 | |
e8e80198 | 15462 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 15463 | if (is_anonymous) |
0114d602 DJ |
15464 | { |
15465 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 15466 | |
eb1e02fd | 15467 | std::vector<const char *> excludes; |
22cee43f PMR |
15468 | add_using_directive (using_directives (cu->language), |
15469 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 15470 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 15471 | } |
5c4e30ca | 15472 | } |
9219021c | 15473 | |
639d11d3 | 15474 | if (die->child != NULL) |
d9fa45fe | 15475 | { |
639d11d3 | 15476 | struct die_info *child_die = die->child; |
6e70227d | 15477 | |
d9fa45fe DC |
15478 | while (child_die && child_die->tag) |
15479 | { | |
e7c27a73 | 15480 | process_die (child_die, cu); |
d9fa45fe DC |
15481 | child_die = sibling_die (child_die); |
15482 | } | |
15483 | } | |
38d518c9 EZ |
15484 | } |
15485 | ||
f55ee35c JK |
15486 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
15487 | imported module. Still we need that type as local Fortran "use ... only" | |
15488 | declaration imports depend on the created type in determine_prefix. */ | |
15489 | ||
15490 | static struct type * | |
15491 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
15492 | { | |
15493 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 15494 | const char *module_name; |
f55ee35c JK |
15495 | struct type *type; |
15496 | ||
15497 | module_name = dwarf2_name (die, cu); | |
15498 | if (!module_name) | |
3e43a32a MS |
15499 | complaint (&symfile_complaints, |
15500 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 15501 | to_underlying (die->sect_off)); |
19f392bc | 15502 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
15503 | |
15504 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
15505 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
15506 | ||
15507 | return set_die_type (die, type, cu); | |
15508 | } | |
15509 | ||
5d7cb8df JK |
15510 | /* Read a Fortran module. */ |
15511 | ||
15512 | static void | |
15513 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
15514 | { | |
15515 | struct die_info *child_die = die->child; | |
530e8392 KB |
15516 | struct type *type; |
15517 | ||
15518 | type = read_type_die (die, cu); | |
15519 | new_symbol (die, type, cu); | |
5d7cb8df | 15520 | |
5d7cb8df JK |
15521 | while (child_die && child_die->tag) |
15522 | { | |
15523 | process_die (child_die, cu); | |
15524 | child_die = sibling_die (child_die); | |
15525 | } | |
15526 | } | |
15527 | ||
38d518c9 EZ |
15528 | /* Return the name of the namespace represented by DIE. Set |
15529 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
15530 | namespace. */ | |
15531 | ||
15532 | static const char * | |
e142c38c | 15533 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
15534 | { |
15535 | struct die_info *current_die; | |
15536 | const char *name = NULL; | |
15537 | ||
15538 | /* Loop through the extensions until we find a name. */ | |
15539 | ||
15540 | for (current_die = die; | |
15541 | current_die != NULL; | |
f2f0e013 | 15542 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 15543 | { |
96553a0c DE |
15544 | /* We don't use dwarf2_name here so that we can detect the absence |
15545 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 15546 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 15547 | |
38d518c9 EZ |
15548 | if (name != NULL) |
15549 | break; | |
15550 | } | |
15551 | ||
15552 | /* Is it an anonymous namespace? */ | |
15553 | ||
15554 | *is_anonymous = (name == NULL); | |
15555 | if (*is_anonymous) | |
2b1dbab0 | 15556 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
15557 | |
15558 | return name; | |
d9fa45fe DC |
15559 | } |
15560 | ||
c906108c SS |
15561 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
15562 | the user defined type vector. */ | |
15563 | ||
f792889a | 15564 | static struct type * |
e7c27a73 | 15565 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15566 | { |
5e2b427d | 15567 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 15568 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 15569 | struct type *type; |
8b2dbe47 KB |
15570 | struct attribute *attr_byte_size; |
15571 | struct attribute *attr_address_class; | |
15572 | int byte_size, addr_class; | |
7e314c57 JK |
15573 | struct type *target_type; |
15574 | ||
15575 | target_type = die_type (die, cu); | |
c906108c | 15576 | |
7e314c57 JK |
15577 | /* The die_type call above may have already set the type for this DIE. */ |
15578 | type = get_die_type (die, cu); | |
15579 | if (type) | |
15580 | return type; | |
15581 | ||
15582 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 15583 | |
e142c38c | 15584 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
15585 | if (attr_byte_size) |
15586 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 15587 | else |
8b2dbe47 KB |
15588 | byte_size = cu_header->addr_size; |
15589 | ||
e142c38c | 15590 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
15591 | if (attr_address_class) |
15592 | addr_class = DW_UNSND (attr_address_class); | |
15593 | else | |
15594 | addr_class = DW_ADDR_none; | |
15595 | ||
15596 | /* If the pointer size or address class is different than the | |
15597 | default, create a type variant marked as such and set the | |
15598 | length accordingly. */ | |
15599 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 15600 | { |
5e2b427d | 15601 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
15602 | { |
15603 | int type_flags; | |
15604 | ||
849957d9 | 15605 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 15606 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
15607 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
15608 | == 0); | |
8b2dbe47 KB |
15609 | type = make_type_with_address_space (type, type_flags); |
15610 | } | |
15611 | else if (TYPE_LENGTH (type) != byte_size) | |
15612 | { | |
3e43a32a MS |
15613 | complaint (&symfile_complaints, |
15614 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 15615 | } |
6e70227d | 15616 | else |
9a619af0 MS |
15617 | { |
15618 | /* Should we also complain about unhandled address classes? */ | |
15619 | } | |
c906108c | 15620 | } |
8b2dbe47 KB |
15621 | |
15622 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 15623 | return set_die_type (die, type, cu); |
c906108c SS |
15624 | } |
15625 | ||
15626 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
15627 | the user defined type vector. */ | |
15628 | ||
f792889a | 15629 | static struct type * |
e7c27a73 | 15630 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
15631 | { |
15632 | struct type *type; | |
15633 | struct type *to_type; | |
15634 | struct type *domain; | |
15635 | ||
e7c27a73 DJ |
15636 | to_type = die_type (die, cu); |
15637 | domain = die_containing_type (die, cu); | |
0d5de010 | 15638 | |
7e314c57 JK |
15639 | /* The calls above may have already set the type for this DIE. */ |
15640 | type = get_die_type (die, cu); | |
15641 | if (type) | |
15642 | return type; | |
15643 | ||
0d5de010 DJ |
15644 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
15645 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
15646 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
15647 | { | |
15648 | struct type *new_type = alloc_type (cu->objfile); | |
15649 | ||
15650 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
15651 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
15652 | TYPE_VARARGS (to_type)); | |
15653 | type = lookup_methodptr_type (new_type); | |
15654 | } | |
0d5de010 DJ |
15655 | else |
15656 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 15657 | |
f792889a | 15658 | return set_die_type (die, type, cu); |
c906108c SS |
15659 | } |
15660 | ||
4297a3f0 | 15661 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
15662 | the user defined type vector. */ |
15663 | ||
f792889a | 15664 | static struct type * |
4297a3f0 AV |
15665 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
15666 | enum type_code refcode) | |
c906108c | 15667 | { |
e7c27a73 | 15668 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 15669 | struct type *type, *target_type; |
c906108c SS |
15670 | struct attribute *attr; |
15671 | ||
4297a3f0 AV |
15672 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
15673 | ||
7e314c57 JK |
15674 | target_type = die_type (die, cu); |
15675 | ||
15676 | /* The die_type call above may have already set the type for this DIE. */ | |
15677 | type = get_die_type (die, cu); | |
15678 | if (type) | |
15679 | return type; | |
15680 | ||
4297a3f0 | 15681 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 15682 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15683 | if (attr) |
15684 | { | |
15685 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15686 | } | |
15687 | else | |
15688 | { | |
107d2387 | 15689 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 15690 | } |
f792889a | 15691 | return set_die_type (die, type, cu); |
c906108c SS |
15692 | } |
15693 | ||
cf363f18 MW |
15694 | /* Add the given cv-qualifiers to the element type of the array. GCC |
15695 | outputs DWARF type qualifiers that apply to an array, not the | |
15696 | element type. But GDB relies on the array element type to carry | |
15697 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
15698 | specification. */ | |
15699 | ||
15700 | static struct type * | |
15701 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
15702 | struct type *base_type, int cnst, int voltl) | |
15703 | { | |
15704 | struct type *el_type, *inner_array; | |
15705 | ||
15706 | base_type = copy_type (base_type); | |
15707 | inner_array = base_type; | |
15708 | ||
15709 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
15710 | { | |
15711 | TYPE_TARGET_TYPE (inner_array) = | |
15712 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
15713 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
15714 | } | |
15715 | ||
15716 | el_type = TYPE_TARGET_TYPE (inner_array); | |
15717 | cnst |= TYPE_CONST (el_type); | |
15718 | voltl |= TYPE_VOLATILE (el_type); | |
15719 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
15720 | ||
15721 | return set_die_type (die, base_type, cu); | |
15722 | } | |
15723 | ||
f792889a | 15724 | static struct type * |
e7c27a73 | 15725 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15726 | { |
f792889a | 15727 | struct type *base_type, *cv_type; |
c906108c | 15728 | |
e7c27a73 | 15729 | base_type = die_type (die, cu); |
7e314c57 JK |
15730 | |
15731 | /* The die_type call above may have already set the type for this DIE. */ | |
15732 | cv_type = get_die_type (die, cu); | |
15733 | if (cv_type) | |
15734 | return cv_type; | |
15735 | ||
2f608a3a KW |
15736 | /* In case the const qualifier is applied to an array type, the element type |
15737 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
15738 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 15739 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 15740 | |
f792889a DJ |
15741 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
15742 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15743 | } |
15744 | ||
f792889a | 15745 | static struct type * |
e7c27a73 | 15746 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15747 | { |
f792889a | 15748 | struct type *base_type, *cv_type; |
c906108c | 15749 | |
e7c27a73 | 15750 | base_type = die_type (die, cu); |
7e314c57 JK |
15751 | |
15752 | /* The die_type call above may have already set the type for this DIE. */ | |
15753 | cv_type = get_die_type (die, cu); | |
15754 | if (cv_type) | |
15755 | return cv_type; | |
15756 | ||
cf363f18 MW |
15757 | /* In case the volatile qualifier is applied to an array type, the |
15758 | element type is so qualified, not the array type (section 6.7.3 | |
15759 | of C99). */ | |
15760 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
15761 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
15762 | ||
f792889a DJ |
15763 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
15764 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15765 | } |
15766 | ||
06d66ee9 TT |
15767 | /* Handle DW_TAG_restrict_type. */ |
15768 | ||
15769 | static struct type * | |
15770 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
15771 | { | |
15772 | struct type *base_type, *cv_type; | |
15773 | ||
15774 | base_type = die_type (die, cu); | |
15775 | ||
15776 | /* The die_type call above may have already set the type for this DIE. */ | |
15777 | cv_type = get_die_type (die, cu); | |
15778 | if (cv_type) | |
15779 | return cv_type; | |
15780 | ||
15781 | cv_type = make_restrict_type (base_type); | |
15782 | return set_die_type (die, cv_type, cu); | |
15783 | } | |
15784 | ||
a2c2acaf MW |
15785 | /* Handle DW_TAG_atomic_type. */ |
15786 | ||
15787 | static struct type * | |
15788 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
15789 | { | |
15790 | struct type *base_type, *cv_type; | |
15791 | ||
15792 | base_type = die_type (die, cu); | |
15793 | ||
15794 | /* The die_type call above may have already set the type for this DIE. */ | |
15795 | cv_type = get_die_type (die, cu); | |
15796 | if (cv_type) | |
15797 | return cv_type; | |
15798 | ||
15799 | cv_type = make_atomic_type (base_type); | |
15800 | return set_die_type (die, cv_type, cu); | |
15801 | } | |
15802 | ||
c906108c SS |
15803 | /* Extract all information from a DW_TAG_string_type DIE and add to |
15804 | the user defined type vector. It isn't really a user defined type, | |
15805 | but it behaves like one, with other DIE's using an AT_user_def_type | |
15806 | attribute to reference it. */ | |
15807 | ||
f792889a | 15808 | static struct type * |
e7c27a73 | 15809 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15810 | { |
e7c27a73 | 15811 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 15812 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15813 | struct type *type, *range_type, *index_type, *char_type; |
15814 | struct attribute *attr; | |
15815 | unsigned int length; | |
15816 | ||
e142c38c | 15817 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
15818 | if (attr) |
15819 | { | |
15820 | length = DW_UNSND (attr); | |
15821 | } | |
15822 | else | |
15823 | { | |
0963b4bd | 15824 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 15825 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
15826 | if (attr) |
15827 | { | |
15828 | length = DW_UNSND (attr); | |
15829 | } | |
15830 | else | |
15831 | { | |
15832 | length = 1; | |
15833 | } | |
c906108c | 15834 | } |
6ccb9162 | 15835 | |
46bf5051 | 15836 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15837 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
15838 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
15839 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 15840 | |
f792889a | 15841 | return set_die_type (die, type, cu); |
c906108c SS |
15842 | } |
15843 | ||
4d804846 JB |
15844 | /* Assuming that DIE corresponds to a function, returns nonzero |
15845 | if the function is prototyped. */ | |
15846 | ||
15847 | static int | |
15848 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
15849 | { | |
15850 | struct attribute *attr; | |
15851 | ||
15852 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
15853 | if (attr && (DW_UNSND (attr) != 0)) | |
15854 | return 1; | |
15855 | ||
15856 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
15857 | is only meaninful for C, but the concept also extends to other | |
15858 | languages that allow unprototyped functions (Eg: Objective C). | |
15859 | For all other languages, assume that functions are always | |
15860 | prototyped. */ | |
15861 | if (cu->language != language_c | |
15862 | && cu->language != language_objc | |
15863 | && cu->language != language_opencl) | |
15864 | return 1; | |
15865 | ||
15866 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
15867 | prototyped and unprototyped functions; default to prototyped, | |
15868 | since that is more common in modern code (and RealView warns | |
15869 | about unprototyped functions). */ | |
15870 | if (producer_is_realview (cu->producer)) | |
15871 | return 1; | |
15872 | ||
15873 | return 0; | |
15874 | } | |
15875 | ||
c906108c SS |
15876 | /* Handle DIES due to C code like: |
15877 | ||
15878 | struct foo | |
c5aa993b JM |
15879 | { |
15880 | int (*funcp)(int a, long l); | |
15881 | int b; | |
15882 | }; | |
c906108c | 15883 | |
0963b4bd | 15884 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 15885 | |
f792889a | 15886 | static struct type * |
e7c27a73 | 15887 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15888 | { |
bb5ed363 | 15889 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
15890 | struct type *type; /* Type that this function returns. */ |
15891 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
15892 | struct attribute *attr; |
15893 | ||
e7c27a73 | 15894 | type = die_type (die, cu); |
7e314c57 JK |
15895 | |
15896 | /* The die_type call above may have already set the type for this DIE. */ | |
15897 | ftype = get_die_type (die, cu); | |
15898 | if (ftype) | |
15899 | return ftype; | |
15900 | ||
0c8b41f1 | 15901 | ftype = lookup_function_type (type); |
c906108c | 15902 | |
4d804846 | 15903 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15904 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15905 | |
c055b101 CV |
15906 | /* Store the calling convention in the type if it's available in |
15907 | the subroutine die. Otherwise set the calling convention to | |
15908 | the default value DW_CC_normal. */ | |
15909 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15910 | if (attr) |
15911 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15912 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15913 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15914 | else | |
15915 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15916 | |
743649fd MW |
15917 | /* Record whether the function returns normally to its caller or not |
15918 | if the DWARF producer set that information. */ | |
15919 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15920 | if (attr && (DW_UNSND (attr) != 0)) | |
15921 | TYPE_NO_RETURN (ftype) = 1; | |
15922 | ||
76c10ea2 GM |
15923 | /* We need to add the subroutine type to the die immediately so |
15924 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15925 | declared as the same subroutine type. */ |
76c10ea2 | 15926 | set_die_type (die, ftype, cu); |
6e70227d | 15927 | |
639d11d3 | 15928 | if (die->child != NULL) |
c906108c | 15929 | { |
bb5ed363 | 15930 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15931 | struct die_info *child_die; |
8072405b | 15932 | int nparams, iparams; |
c906108c SS |
15933 | |
15934 | /* Count the number of parameters. | |
15935 | FIXME: GDB currently ignores vararg functions, but knows about | |
15936 | vararg member functions. */ | |
8072405b | 15937 | nparams = 0; |
639d11d3 | 15938 | child_die = die->child; |
c906108c SS |
15939 | while (child_die && child_die->tag) |
15940 | { | |
15941 | if (child_die->tag == DW_TAG_formal_parameter) | |
15942 | nparams++; | |
15943 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15944 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15945 | child_die = sibling_die (child_die); |
15946 | } | |
15947 | ||
15948 | /* Allocate storage for parameters and fill them in. */ | |
15949 | TYPE_NFIELDS (ftype) = nparams; | |
15950 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15951 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15952 | |
8072405b JK |
15953 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15954 | even if we error out during the parameters reading below. */ | |
15955 | for (iparams = 0; iparams < nparams; iparams++) | |
15956 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15957 | ||
15958 | iparams = 0; | |
639d11d3 | 15959 | child_die = die->child; |
c906108c SS |
15960 | while (child_die && child_die->tag) |
15961 | { | |
15962 | if (child_die->tag == DW_TAG_formal_parameter) | |
15963 | { | |
3ce3b1ba PA |
15964 | struct type *arg_type; |
15965 | ||
15966 | /* DWARF version 2 has no clean way to discern C++ | |
15967 | static and non-static member functions. G++ helps | |
15968 | GDB by marking the first parameter for non-static | |
15969 | member functions (which is the this pointer) as | |
15970 | artificial. We pass this information to | |
15971 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15972 | ||
15973 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15974 | 4.5 does not yet generate. */ | |
e142c38c | 15975 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15976 | if (attr) |
15977 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
15978 | else | |
9c37b5ae | 15979 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
15980 | arg_type = die_type (child_die, cu); |
15981 | ||
15982 | /* RealView does not mark THIS as const, which the testsuite | |
15983 | expects. GCC marks THIS as const in method definitions, | |
15984 | but not in the class specifications (GCC PR 43053). */ | |
15985 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
15986 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
15987 | { | |
15988 | int is_this = 0; | |
15989 | struct dwarf2_cu *arg_cu = cu; | |
15990 | const char *name = dwarf2_name (child_die, cu); | |
15991 | ||
15992 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
15993 | if (attr) | |
15994 | { | |
15995 | /* If the compiler emits this, use it. */ | |
15996 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
15997 | is_this = 1; | |
15998 | } | |
15999 | else if (name && strcmp (name, "this") == 0) | |
16000 | /* Function definitions will have the argument names. */ | |
16001 | is_this = 1; | |
16002 | else if (name == NULL && iparams == 0) | |
16003 | /* Declarations may not have the names, so like | |
16004 | elsewhere in GDB, assume an artificial first | |
16005 | argument is "this". */ | |
16006 | is_this = 1; | |
16007 | ||
16008 | if (is_this) | |
16009 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
16010 | arg_type, 0); | |
16011 | } | |
16012 | ||
16013 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
16014 | iparams++; |
16015 | } | |
16016 | child_die = sibling_die (child_die); | |
16017 | } | |
16018 | } | |
16019 | ||
76c10ea2 | 16020 | return ftype; |
c906108c SS |
16021 | } |
16022 | ||
f792889a | 16023 | static struct type * |
e7c27a73 | 16024 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16025 | { |
e7c27a73 | 16026 | struct objfile *objfile = cu->objfile; |
0114d602 | 16027 | const char *name = NULL; |
3c8e0968 | 16028 | struct type *this_type, *target_type; |
c906108c | 16029 | |
94af9270 | 16030 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
16031 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
16032 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 16033 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
16034 | target_type = die_type (die, cu); |
16035 | if (target_type != this_type) | |
16036 | TYPE_TARGET_TYPE (this_type) = target_type; | |
16037 | else | |
16038 | { | |
16039 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
16040 | spec and cause infinite loops in GDB. */ | |
16041 | complaint (&symfile_complaints, | |
16042 | _("Self-referential DW_TAG_typedef " | |
16043 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16044 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
16045 | TYPE_TARGET_TYPE (this_type) = NULL; |
16046 | } | |
f792889a | 16047 | return this_type; |
c906108c SS |
16048 | } |
16049 | ||
9b790ce7 UW |
16050 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
16051 | (which may be different from NAME) to the architecture back-end to allow | |
16052 | it to guess the correct format if necessary. */ | |
16053 | ||
16054 | static struct type * | |
16055 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
16056 | const char *name_hint) | |
16057 | { | |
16058 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16059 | const struct floatformat **format; | |
16060 | struct type *type; | |
16061 | ||
16062 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
16063 | if (format) | |
16064 | type = init_float_type (objfile, bits, name, format); | |
16065 | else | |
77b7c781 | 16066 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
16067 | |
16068 | return type; | |
16069 | } | |
16070 | ||
c906108c SS |
16071 | /* Find a representation of a given base type and install |
16072 | it in the TYPE field of the die. */ | |
16073 | ||
f792889a | 16074 | static struct type * |
e7c27a73 | 16075 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16076 | { |
e7c27a73 | 16077 | struct objfile *objfile = cu->objfile; |
c906108c SS |
16078 | struct type *type; |
16079 | struct attribute *attr; | |
19f392bc | 16080 | int encoding = 0, bits = 0; |
15d034d0 | 16081 | const char *name; |
c906108c | 16082 | |
e142c38c | 16083 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
16084 | if (attr) |
16085 | { | |
16086 | encoding = DW_UNSND (attr); | |
16087 | } | |
e142c38c | 16088 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16089 | if (attr) |
16090 | { | |
19f392bc | 16091 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 16092 | } |
39cbfefa | 16093 | name = dwarf2_name (die, cu); |
6ccb9162 | 16094 | if (!name) |
c906108c | 16095 | { |
6ccb9162 UW |
16096 | complaint (&symfile_complaints, |
16097 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 16098 | } |
6ccb9162 UW |
16099 | |
16100 | switch (encoding) | |
c906108c | 16101 | { |
6ccb9162 UW |
16102 | case DW_ATE_address: |
16103 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 16104 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 16105 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
16106 | break; |
16107 | case DW_ATE_boolean: | |
19f392bc | 16108 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
16109 | break; |
16110 | case DW_ATE_complex_float: | |
9b790ce7 | 16111 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 16112 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
16113 | break; |
16114 | case DW_ATE_decimal_float: | |
19f392bc | 16115 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
16116 | break; |
16117 | case DW_ATE_float: | |
9b790ce7 | 16118 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
16119 | break; |
16120 | case DW_ATE_signed: | |
19f392bc | 16121 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
16122 | break; |
16123 | case DW_ATE_unsigned: | |
3b2b8fea TT |
16124 | if (cu->language == language_fortran |
16125 | && name | |
61012eef | 16126 | && startswith (name, "character(")) |
19f392bc UW |
16127 | type = init_character_type (objfile, bits, 1, name); |
16128 | else | |
16129 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
16130 | break; |
16131 | case DW_ATE_signed_char: | |
6e70227d | 16132 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
16133 | || cu->language == language_pascal |
16134 | || cu->language == language_fortran) | |
19f392bc UW |
16135 | type = init_character_type (objfile, bits, 0, name); |
16136 | else | |
16137 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
16138 | break; |
16139 | case DW_ATE_unsigned_char: | |
868a0084 | 16140 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 16141 | || cu->language == language_pascal |
c44af4eb TT |
16142 | || cu->language == language_fortran |
16143 | || cu->language == language_rust) | |
19f392bc UW |
16144 | type = init_character_type (objfile, bits, 1, name); |
16145 | else | |
16146 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 16147 | break; |
75079b2b | 16148 | case DW_ATE_UTF: |
53e710ac PA |
16149 | { |
16150 | gdbarch *arch = get_objfile_arch (objfile); | |
16151 | ||
16152 | if (bits == 16) | |
16153 | type = builtin_type (arch)->builtin_char16; | |
16154 | else if (bits == 32) | |
16155 | type = builtin_type (arch)->builtin_char32; | |
16156 | else | |
16157 | { | |
16158 | complaint (&symfile_complaints, | |
16159 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
16160 | bits); | |
16161 | type = init_integer_type (objfile, bits, 1, name); | |
16162 | } | |
16163 | return set_die_type (die, type, cu); | |
16164 | } | |
75079b2b TT |
16165 | break; |
16166 | ||
6ccb9162 UW |
16167 | default: |
16168 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
16169 | dwarf_type_encoding_name (encoding)); | |
77b7c781 | 16170 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 16171 | break; |
c906108c | 16172 | } |
6ccb9162 | 16173 | |
0114d602 | 16174 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 16175 | TYPE_NOSIGN (type) = 1; |
0114d602 | 16176 | |
f792889a | 16177 | return set_die_type (die, type, cu); |
c906108c SS |
16178 | } |
16179 | ||
80180f79 SA |
16180 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
16181 | resulting value of the attribute into struct bound_prop. | |
16182 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
16183 | ||
16184 | static int | |
16185 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
16186 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
16187 | { | |
16188 | struct dwarf2_property_baton *baton; | |
16189 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
16190 | ||
16191 | if (attr == NULL || prop == NULL) | |
16192 | return 0; | |
16193 | ||
16194 | if (attr_form_is_block (attr)) | |
16195 | { | |
8d749320 | 16196 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
16197 | baton->referenced_type = NULL; |
16198 | baton->locexpr.per_cu = cu->per_cu; | |
16199 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
16200 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
16201 | prop->data.baton = baton; | |
16202 | prop->kind = PROP_LOCEXPR; | |
16203 | gdb_assert (prop->data.baton != NULL); | |
16204 | } | |
16205 | else if (attr_form_is_ref (attr)) | |
16206 | { | |
16207 | struct dwarf2_cu *target_cu = cu; | |
16208 | struct die_info *target_die; | |
16209 | struct attribute *target_attr; | |
16210 | ||
16211 | target_die = follow_die_ref (die, attr, &target_cu); | |
16212 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
16213 | if (target_attr == NULL) |
16214 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
16215 | target_cu); | |
80180f79 SA |
16216 | if (target_attr == NULL) |
16217 | return 0; | |
16218 | ||
df25ebbd | 16219 | switch (target_attr->name) |
80180f79 | 16220 | { |
df25ebbd JB |
16221 | case DW_AT_location: |
16222 | if (attr_form_is_section_offset (target_attr)) | |
16223 | { | |
8d749320 | 16224 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
16225 | baton->referenced_type = die_type (target_die, target_cu); |
16226 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
16227 | prop->data.baton = baton; | |
16228 | prop->kind = PROP_LOCLIST; | |
16229 | gdb_assert (prop->data.baton != NULL); | |
16230 | } | |
16231 | else if (attr_form_is_block (target_attr)) | |
16232 | { | |
8d749320 | 16233 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
16234 | baton->referenced_type = die_type (target_die, target_cu); |
16235 | baton->locexpr.per_cu = cu->per_cu; | |
16236 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
16237 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
16238 | prop->data.baton = baton; | |
16239 | prop->kind = PROP_LOCEXPR; | |
16240 | gdb_assert (prop->data.baton != NULL); | |
16241 | } | |
16242 | else | |
16243 | { | |
16244 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16245 | "dynamic property"); | |
16246 | return 0; | |
16247 | } | |
16248 | break; | |
16249 | case DW_AT_data_member_location: | |
16250 | { | |
16251 | LONGEST offset; | |
16252 | ||
16253 | if (!handle_data_member_location (target_die, target_cu, | |
16254 | &offset)) | |
16255 | return 0; | |
16256 | ||
8d749320 | 16257 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
16258 | baton->referenced_type = read_type_die (target_die->parent, |
16259 | target_cu); | |
df25ebbd JB |
16260 | baton->offset_info.offset = offset; |
16261 | baton->offset_info.type = die_type (target_die, target_cu); | |
16262 | prop->data.baton = baton; | |
16263 | prop->kind = PROP_ADDR_OFFSET; | |
16264 | break; | |
16265 | } | |
80180f79 SA |
16266 | } |
16267 | } | |
16268 | else if (attr_form_is_constant (attr)) | |
16269 | { | |
16270 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
16271 | prop->kind = PROP_CONST; | |
16272 | } | |
16273 | else | |
16274 | { | |
16275 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
16276 | dwarf2_name (die, cu)); | |
16277 | return 0; | |
16278 | } | |
16279 | ||
16280 | return 1; | |
16281 | } | |
16282 | ||
a02abb62 JB |
16283 | /* Read the given DW_AT_subrange DIE. */ |
16284 | ||
f792889a | 16285 | static struct type * |
a02abb62 JB |
16286 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
16287 | { | |
4c9ad8c2 | 16288 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
16289 | struct type *range_type; |
16290 | struct attribute *attr; | |
729efb13 | 16291 | struct dynamic_prop low, high; |
4fae6e18 | 16292 | int low_default_is_valid; |
c451ebe5 | 16293 | int high_bound_is_count = 0; |
15d034d0 | 16294 | const char *name; |
43bbcdc2 | 16295 | LONGEST negative_mask; |
e77813c8 | 16296 | |
4c9ad8c2 TT |
16297 | orig_base_type = die_type (die, cu); |
16298 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
16299 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
16300 | creating the range type, but we use the result of check_typedef | |
16301 | when examining properties of the type. */ | |
16302 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 16303 | |
7e314c57 JK |
16304 | /* The die_type call above may have already set the type for this DIE. */ |
16305 | range_type = get_die_type (die, cu); | |
16306 | if (range_type) | |
16307 | return range_type; | |
16308 | ||
729efb13 SA |
16309 | low.kind = PROP_CONST; |
16310 | high.kind = PROP_CONST; | |
16311 | high.data.const_val = 0; | |
16312 | ||
4fae6e18 JK |
16313 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
16314 | omitting DW_AT_lower_bound. */ | |
16315 | switch (cu->language) | |
6e70227d | 16316 | { |
4fae6e18 JK |
16317 | case language_c: |
16318 | case language_cplus: | |
729efb13 | 16319 | low.data.const_val = 0; |
4fae6e18 JK |
16320 | low_default_is_valid = 1; |
16321 | break; | |
16322 | case language_fortran: | |
729efb13 | 16323 | low.data.const_val = 1; |
4fae6e18 JK |
16324 | low_default_is_valid = 1; |
16325 | break; | |
16326 | case language_d: | |
4fae6e18 | 16327 | case language_objc: |
c44af4eb | 16328 | case language_rust: |
729efb13 | 16329 | low.data.const_val = 0; |
4fae6e18 JK |
16330 | low_default_is_valid = (cu->header.version >= 4); |
16331 | break; | |
16332 | case language_ada: | |
16333 | case language_m2: | |
16334 | case language_pascal: | |
729efb13 | 16335 | low.data.const_val = 1; |
4fae6e18 JK |
16336 | low_default_is_valid = (cu->header.version >= 4); |
16337 | break; | |
16338 | default: | |
729efb13 | 16339 | low.data.const_val = 0; |
4fae6e18 JK |
16340 | low_default_is_valid = 0; |
16341 | break; | |
a02abb62 JB |
16342 | } |
16343 | ||
e142c38c | 16344 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 16345 | if (attr) |
11c1ba78 | 16346 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
16347 | else if (!low_default_is_valid) |
16348 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
16349 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16350 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 16351 | |
e142c38c | 16352 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 16353 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
16354 | { |
16355 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 16356 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 16357 | { |
c451ebe5 SA |
16358 | /* If bounds are constant do the final calculation here. */ |
16359 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
16360 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
16361 | else | |
16362 | high_bound_is_count = 1; | |
c2ff108b | 16363 | } |
e77813c8 PM |
16364 | } |
16365 | ||
16366 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
16367 | without specifying a base type. | |
16368 | In that case, the base type must be set to the type of | |
16369 | the lower bound, upper bound or count, in that order, if any of these | |
16370 | three attributes references an object that has a type. | |
16371 | If no base type is found, the Dwarf-2 specifications say that | |
16372 | a signed integer type of size equal to the size of an address should | |
16373 | be used. | |
16374 | For the following C code: `extern char gdb_int [];' | |
16375 | GCC produces an empty range DIE. | |
16376 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 16377 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
16378 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
16379 | { | |
16380 | struct objfile *objfile = cu->objfile; | |
16381 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16382 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
16383 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
16384 | ||
16385 | /* Test "int", "long int", and "long long int" objfile types, | |
16386 | and select the first one having a size above or equal to the | |
16387 | architecture address size. */ | |
16388 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16389 | base_type = int_type; | |
16390 | else | |
16391 | { | |
16392 | int_type = objfile_type (objfile)->builtin_long; | |
16393 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16394 | base_type = int_type; | |
16395 | else | |
16396 | { | |
16397 | int_type = objfile_type (objfile)->builtin_long_long; | |
16398 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16399 | base_type = int_type; | |
16400 | } | |
16401 | } | |
16402 | } | |
a02abb62 | 16403 | |
dbb9c2b1 JB |
16404 | /* Normally, the DWARF producers are expected to use a signed |
16405 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
16406 | But this is unfortunately not always the case, as witnessed | |
16407 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
16408 | is used instead. To work around that ambiguity, we treat | |
16409 | the bounds as signed, and thus sign-extend their values, when | |
16410 | the base type is signed. */ | |
6e70227d | 16411 | negative_mask = |
66c6502d | 16412 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
16413 | if (low.kind == PROP_CONST |
16414 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
16415 | low.data.const_val |= negative_mask; | |
16416 | if (high.kind == PROP_CONST | |
16417 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
16418 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 16419 | |
729efb13 | 16420 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 16421 | |
c451ebe5 SA |
16422 | if (high_bound_is_count) |
16423 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
16424 | ||
c2ff108b JK |
16425 | /* Ada expects an empty array on no boundary attributes. */ |
16426 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 16427 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 16428 | |
39cbfefa DJ |
16429 | name = dwarf2_name (die, cu); |
16430 | if (name) | |
16431 | TYPE_NAME (range_type) = name; | |
6e70227d | 16432 | |
e142c38c | 16433 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
16434 | if (attr) |
16435 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
16436 | ||
7e314c57 JK |
16437 | set_die_type (die, range_type, cu); |
16438 | ||
16439 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16440 | set_descriptive_type (range_type, die, cu); |
16441 | ||
7e314c57 | 16442 | return range_type; |
a02abb62 | 16443 | } |
6e70227d | 16444 | |
f792889a | 16445 | static struct type * |
81a17f79 JB |
16446 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
16447 | { | |
16448 | struct type *type; | |
81a17f79 | 16449 | |
81a17f79 JB |
16450 | /* For now, we only support the C meaning of an unspecified type: void. */ |
16451 | ||
19f392bc | 16452 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 16453 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 16454 | |
f792889a | 16455 | return set_die_type (die, type, cu); |
81a17f79 | 16456 | } |
a02abb62 | 16457 | |
639d11d3 DC |
16458 | /* Read a single die and all its descendents. Set the die's sibling |
16459 | field to NULL; set other fields in the die correctly, and set all | |
16460 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
16461 | location of the info_ptr after reading all of those dies. PARENT | |
16462 | is the parent of the die in question. */ | |
16463 | ||
16464 | static struct die_info * | |
dee91e82 | 16465 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
16466 | const gdb_byte *info_ptr, |
16467 | const gdb_byte **new_info_ptr, | |
dee91e82 | 16468 | struct die_info *parent) |
639d11d3 DC |
16469 | { |
16470 | struct die_info *die; | |
d521ce57 | 16471 | const gdb_byte *cur_ptr; |
639d11d3 DC |
16472 | int has_children; |
16473 | ||
bf6af496 | 16474 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
16475 | if (die == NULL) |
16476 | { | |
16477 | *new_info_ptr = cur_ptr; | |
16478 | return NULL; | |
16479 | } | |
93311388 | 16480 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
16481 | |
16482 | if (has_children) | |
bf6af496 | 16483 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
16484 | else |
16485 | { | |
16486 | die->child = NULL; | |
16487 | *new_info_ptr = cur_ptr; | |
16488 | } | |
16489 | ||
16490 | die->sibling = NULL; | |
16491 | die->parent = parent; | |
16492 | return die; | |
16493 | } | |
16494 | ||
16495 | /* Read a die, all of its descendents, and all of its siblings; set | |
16496 | all of the fields of all of the dies correctly. Arguments are as | |
16497 | in read_die_and_children. */ | |
16498 | ||
16499 | static struct die_info * | |
bf6af496 | 16500 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
16501 | const gdb_byte *info_ptr, |
16502 | const gdb_byte **new_info_ptr, | |
bf6af496 | 16503 | struct die_info *parent) |
639d11d3 DC |
16504 | { |
16505 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 16506 | const gdb_byte *cur_ptr; |
639d11d3 | 16507 | |
c906108c | 16508 | cur_ptr = info_ptr; |
639d11d3 DC |
16509 | first_die = last_sibling = NULL; |
16510 | ||
16511 | while (1) | |
c906108c | 16512 | { |
639d11d3 | 16513 | struct die_info *die |
dee91e82 | 16514 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 16515 | |
1d325ec1 | 16516 | if (die == NULL) |
c906108c | 16517 | { |
639d11d3 DC |
16518 | *new_info_ptr = cur_ptr; |
16519 | return first_die; | |
c906108c | 16520 | } |
1d325ec1 DJ |
16521 | |
16522 | if (!first_die) | |
16523 | first_die = die; | |
c906108c | 16524 | else |
1d325ec1 DJ |
16525 | last_sibling->sibling = die; |
16526 | ||
16527 | last_sibling = die; | |
c906108c | 16528 | } |
c906108c SS |
16529 | } |
16530 | ||
bf6af496 DE |
16531 | /* Read a die, all of its descendents, and all of its siblings; set |
16532 | all of the fields of all of the dies correctly. Arguments are as | |
16533 | in read_die_and_children. | |
16534 | This the main entry point for reading a DIE and all its children. */ | |
16535 | ||
16536 | static struct die_info * | |
16537 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
16538 | const gdb_byte *info_ptr, |
16539 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
16540 | struct die_info *parent) |
16541 | { | |
16542 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
16543 | new_info_ptr, parent); | |
16544 | ||
b4f54984 | 16545 | if (dwarf_die_debug) |
bf6af496 DE |
16546 | { |
16547 | fprintf_unfiltered (gdb_stdlog, | |
16548 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16549 | get_section_name (reader->die_section), |
bf6af496 DE |
16550 | (unsigned) (info_ptr - reader->die_section->buffer), |
16551 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16552 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
16553 | } |
16554 | ||
16555 | return die; | |
16556 | } | |
16557 | ||
3019eac3 DE |
16558 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
16559 | attributes. | |
16560 | The caller is responsible for filling in the extra attributes | |
16561 | and updating (*DIEP)->num_attrs. | |
16562 | Set DIEP to point to a newly allocated die with its information, | |
16563 | except for its child, sibling, and parent fields. | |
16564 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 16565 | |
d521ce57 | 16566 | static const gdb_byte * |
3019eac3 | 16567 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 16568 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 16569 | int *has_children, int num_extra_attrs) |
93311388 | 16570 | { |
b64f50a1 | 16571 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
16572 | struct abbrev_info *abbrev; |
16573 | struct die_info *die; | |
16574 | struct dwarf2_cu *cu = reader->cu; | |
16575 | bfd *abfd = reader->abfd; | |
16576 | ||
9c541725 | 16577 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
16578 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16579 | info_ptr += bytes_read; | |
16580 | if (!abbrev_number) | |
16581 | { | |
16582 | *diep = NULL; | |
16583 | *has_children = 0; | |
16584 | return info_ptr; | |
16585 | } | |
16586 | ||
433df2d4 | 16587 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 16588 | if (!abbrev) |
348e048f DE |
16589 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
16590 | abbrev_number, | |
16591 | bfd_get_filename (abfd)); | |
16592 | ||
3019eac3 | 16593 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 16594 | die->sect_off = sect_off; |
93311388 DE |
16595 | die->tag = abbrev->tag; |
16596 | die->abbrev = abbrev_number; | |
16597 | ||
3019eac3 DE |
16598 | /* Make the result usable. |
16599 | The caller needs to update num_attrs after adding the extra | |
16600 | attributes. */ | |
93311388 DE |
16601 | die->num_attrs = abbrev->num_attrs; |
16602 | ||
16603 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
16604 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
16605 | info_ptr); | |
93311388 DE |
16606 | |
16607 | *diep = die; | |
16608 | *has_children = abbrev->has_children; | |
16609 | return info_ptr; | |
16610 | } | |
16611 | ||
3019eac3 DE |
16612 | /* Read a die and all its attributes. |
16613 | Set DIEP to point to a newly allocated die with its information, | |
16614 | except for its child, sibling, and parent fields. | |
16615 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
16616 | ||
d521ce57 | 16617 | static const gdb_byte * |
3019eac3 | 16618 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 16619 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
16620 | int *has_children) |
16621 | { | |
d521ce57 | 16622 | const gdb_byte *result; |
bf6af496 DE |
16623 | |
16624 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
16625 | ||
b4f54984 | 16626 | if (dwarf_die_debug) |
bf6af496 DE |
16627 | { |
16628 | fprintf_unfiltered (gdb_stdlog, | |
16629 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16630 | get_section_name (reader->die_section), |
bf6af496 DE |
16631 | (unsigned) (info_ptr - reader->die_section->buffer), |
16632 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16633 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
16634 | } |
16635 | ||
16636 | return result; | |
3019eac3 | 16637 | } |
433df2d4 DE |
16638 | \f |
16639 | /* Abbreviation tables. | |
3019eac3 | 16640 | |
433df2d4 | 16641 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
16642 | stored in a separate .debug_abbrev section. Before we read any |
16643 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
16644 | in a hash table. */ |
16645 | ||
16646 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
16647 | ||
16648 | static struct abbrev_info * | |
16649 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
16650 | { | |
16651 | struct abbrev_info *abbrev; | |
16652 | ||
8d749320 | 16653 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 16654 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 16655 | |
433df2d4 DE |
16656 | return abbrev; |
16657 | } | |
16658 | ||
16659 | /* Add an abbreviation to the table. */ | |
c906108c SS |
16660 | |
16661 | static void | |
433df2d4 DE |
16662 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
16663 | unsigned int abbrev_number, | |
16664 | struct abbrev_info *abbrev) | |
16665 | { | |
16666 | unsigned int hash_number; | |
16667 | ||
16668 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16669 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
16670 | abbrev_table->abbrevs[hash_number] = abbrev; | |
16671 | } | |
dee91e82 | 16672 | |
433df2d4 DE |
16673 | /* Look up an abbrev in the table. |
16674 | Returns NULL if the abbrev is not found. */ | |
16675 | ||
16676 | static struct abbrev_info * | |
16677 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
16678 | unsigned int abbrev_number) | |
c906108c | 16679 | { |
433df2d4 DE |
16680 | unsigned int hash_number; |
16681 | struct abbrev_info *abbrev; | |
16682 | ||
16683 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16684 | abbrev = abbrev_table->abbrevs[hash_number]; | |
16685 | ||
16686 | while (abbrev) | |
16687 | { | |
16688 | if (abbrev->number == abbrev_number) | |
16689 | return abbrev; | |
16690 | abbrev = abbrev->next; | |
16691 | } | |
16692 | return NULL; | |
16693 | } | |
16694 | ||
16695 | /* Read in an abbrev table. */ | |
16696 | ||
16697 | static struct abbrev_table * | |
16698 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 16699 | sect_offset sect_off) |
433df2d4 DE |
16700 | { |
16701 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 16702 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 16703 | struct abbrev_table *abbrev_table; |
d521ce57 | 16704 | const gdb_byte *abbrev_ptr; |
c906108c SS |
16705 | struct abbrev_info *cur_abbrev; |
16706 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 16707 | unsigned int abbrev_form; |
f3dd6933 DJ |
16708 | struct attr_abbrev *cur_attrs; |
16709 | unsigned int allocated_attrs; | |
c906108c | 16710 | |
70ba0933 | 16711 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 16712 | abbrev_table->sect_off = sect_off; |
433df2d4 | 16713 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
16714 | abbrev_table->abbrevs = |
16715 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
16716 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
16717 | memset (abbrev_table->abbrevs, 0, |
16718 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 16719 | |
433df2d4 | 16720 | dwarf2_read_section (objfile, section); |
9c541725 | 16721 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
16722 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16723 | abbrev_ptr += bytes_read; | |
16724 | ||
f3dd6933 | 16725 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 16726 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 16727 | |
0963b4bd | 16728 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
16729 | while (abbrev_number) |
16730 | { | |
433df2d4 | 16731 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
16732 | |
16733 | /* read in abbrev header */ | |
16734 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
16735 | cur_abbrev->tag |
16736 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
16737 | abbrev_ptr += bytes_read; |
16738 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
16739 | abbrev_ptr += 1; | |
16740 | ||
16741 | /* now read in declarations */ | |
22d2f3ab | 16742 | for (;;) |
c906108c | 16743 | { |
43988095 JK |
16744 | LONGEST implicit_const; |
16745 | ||
22d2f3ab JK |
16746 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16747 | abbrev_ptr += bytes_read; | |
16748 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16749 | abbrev_ptr += bytes_read; | |
43988095 JK |
16750 | if (abbrev_form == DW_FORM_implicit_const) |
16751 | { | |
16752 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
16753 | &bytes_read); | |
16754 | abbrev_ptr += bytes_read; | |
16755 | } | |
16756 | else | |
16757 | { | |
16758 | /* Initialize it due to a false compiler warning. */ | |
16759 | implicit_const = -1; | |
16760 | } | |
22d2f3ab JK |
16761 | |
16762 | if (abbrev_name == 0) | |
16763 | break; | |
16764 | ||
f3dd6933 | 16765 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 16766 | { |
f3dd6933 DJ |
16767 | allocated_attrs += ATTR_ALLOC_CHUNK; |
16768 | cur_attrs | |
224c3ddb | 16769 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 16770 | } |
ae038cb0 | 16771 | |
aead7601 SM |
16772 | cur_attrs[cur_abbrev->num_attrs].name |
16773 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 16774 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 16775 | = (enum dwarf_form) abbrev_form; |
43988095 | 16776 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 16777 | ++cur_abbrev->num_attrs; |
c906108c SS |
16778 | } |
16779 | ||
8d749320 SM |
16780 | cur_abbrev->attrs = |
16781 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
16782 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
16783 | memcpy (cur_abbrev->attrs, cur_attrs, |
16784 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
16785 | ||
433df2d4 | 16786 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
16787 | |
16788 | /* Get next abbreviation. | |
16789 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
16790 | always properly terminated with an abbrev number of 0. |
16791 | Exit loop if we encounter an abbreviation which we have | |
16792 | already read (which means we are about to read the abbreviations | |
16793 | for the next compile unit) or if the end of the abbreviation | |
16794 | table is reached. */ | |
433df2d4 | 16795 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
16796 | break; |
16797 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16798 | abbrev_ptr += bytes_read; | |
433df2d4 | 16799 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
16800 | break; |
16801 | } | |
f3dd6933 DJ |
16802 | |
16803 | xfree (cur_attrs); | |
433df2d4 | 16804 | return abbrev_table; |
c906108c SS |
16805 | } |
16806 | ||
433df2d4 | 16807 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 16808 | |
c906108c | 16809 | static void |
433df2d4 | 16810 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 16811 | { |
433df2d4 DE |
16812 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
16813 | xfree (abbrev_table); | |
c906108c SS |
16814 | } |
16815 | ||
f4dc4d17 DE |
16816 | /* Same as abbrev_table_free but as a cleanup. |
16817 | We pass in a pointer to the pointer to the table so that we can | |
16818 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 16819 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
16820 | |
16821 | static void | |
16822 | abbrev_table_free_cleanup (void *table_ptr) | |
16823 | { | |
9a3c8263 | 16824 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
16825 | |
16826 | if (*abbrev_table_ptr != NULL) | |
16827 | abbrev_table_free (*abbrev_table_ptr); | |
16828 | *abbrev_table_ptr = NULL; | |
16829 | } | |
16830 | ||
433df2d4 DE |
16831 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
16832 | ||
16833 | static void | |
16834 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
16835 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 16836 | { |
433df2d4 | 16837 | cu->abbrev_table = |
9c541725 | 16838 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 16839 | } |
c906108c | 16840 | |
433df2d4 | 16841 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 16842 | |
433df2d4 DE |
16843 | static void |
16844 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
16845 | { | |
9a3c8263 | 16846 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 16847 | |
a2ce51a0 DE |
16848 | if (cu->abbrev_table != NULL) |
16849 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
16850 | /* Set this to NULL so that we SEGV if we try to read it later, |
16851 | and also because free_comp_unit verifies this is NULL. */ | |
16852 | cu->abbrev_table = NULL; | |
16853 | } | |
16854 | \f | |
72bf9492 DJ |
16855 | /* Returns nonzero if TAG represents a type that we might generate a partial |
16856 | symbol for. */ | |
16857 | ||
16858 | static int | |
16859 | is_type_tag_for_partial (int tag) | |
16860 | { | |
16861 | switch (tag) | |
16862 | { | |
16863 | #if 0 | |
16864 | /* Some types that would be reasonable to generate partial symbols for, | |
16865 | that we don't at present. */ | |
16866 | case DW_TAG_array_type: | |
16867 | case DW_TAG_file_type: | |
16868 | case DW_TAG_ptr_to_member_type: | |
16869 | case DW_TAG_set_type: | |
16870 | case DW_TAG_string_type: | |
16871 | case DW_TAG_subroutine_type: | |
16872 | #endif | |
16873 | case DW_TAG_base_type: | |
16874 | case DW_TAG_class_type: | |
680b30c7 | 16875 | case DW_TAG_interface_type: |
72bf9492 DJ |
16876 | case DW_TAG_enumeration_type: |
16877 | case DW_TAG_structure_type: | |
16878 | case DW_TAG_subrange_type: | |
16879 | case DW_TAG_typedef: | |
16880 | case DW_TAG_union_type: | |
16881 | return 1; | |
16882 | default: | |
16883 | return 0; | |
16884 | } | |
16885 | } | |
16886 | ||
16887 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
16888 | ||
16889 | static struct partial_die_info * | |
dee91e82 | 16890 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 16891 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 16892 | { |
dee91e82 | 16893 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16894 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
16895 | struct partial_die_info *part_die; |
16896 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
16897 | struct abbrev_info *abbrev; | |
16898 | unsigned int bytes_read; | |
5afb4e99 | 16899 | unsigned int load_all = 0; |
72bf9492 DJ |
16900 | int nesting_level = 1; |
16901 | ||
16902 | parent_die = NULL; | |
16903 | last_die = NULL; | |
16904 | ||
7adf1e79 DE |
16905 | gdb_assert (cu->per_cu != NULL); |
16906 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16907 | load_all = 1; |
16908 | ||
72bf9492 DJ |
16909 | cu->partial_dies |
16910 | = htab_create_alloc_ex (cu->header.length / 12, | |
16911 | partial_die_hash, | |
16912 | partial_die_eq, | |
16913 | NULL, | |
16914 | &cu->comp_unit_obstack, | |
16915 | hashtab_obstack_allocate, | |
16916 | dummy_obstack_deallocate); | |
16917 | ||
8d749320 | 16918 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16919 | |
16920 | while (1) | |
16921 | { | |
16922 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16923 | ||
16924 | /* A NULL abbrev means the end of a series of children. */ | |
16925 | if (abbrev == NULL) | |
16926 | { | |
16927 | if (--nesting_level == 0) | |
16928 | { | |
16929 | /* PART_DIE was probably the last thing allocated on the | |
16930 | comp_unit_obstack, so we could call obstack_free | |
16931 | here. We don't do that because the waste is small, | |
16932 | and will be cleaned up when we're done with this | |
16933 | compilation unit. This way, we're also more robust | |
16934 | against other users of the comp_unit_obstack. */ | |
16935 | return first_die; | |
16936 | } | |
16937 | info_ptr += bytes_read; | |
16938 | last_die = parent_die; | |
16939 | parent_die = parent_die->die_parent; | |
16940 | continue; | |
16941 | } | |
16942 | ||
98bfdba5 PA |
16943 | /* Check for template arguments. We never save these; if |
16944 | they're seen, we just mark the parent, and go on our way. */ | |
16945 | if (parent_die != NULL | |
16946 | && cu->language == language_cplus | |
16947 | && (abbrev->tag == DW_TAG_template_type_param | |
16948 | || abbrev->tag == DW_TAG_template_value_param)) | |
16949 | { | |
16950 | parent_die->has_template_arguments = 1; | |
16951 | ||
16952 | if (!load_all) | |
16953 | { | |
16954 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16955 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16956 | continue; |
16957 | } | |
16958 | } | |
16959 | ||
0d99eb77 | 16960 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16961 | Skip their other children. */ |
16962 | if (!load_all | |
16963 | && cu->language == language_cplus | |
16964 | && parent_die != NULL | |
16965 | && parent_die->tag == DW_TAG_subprogram) | |
16966 | { | |
dee91e82 | 16967 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16968 | continue; |
16969 | } | |
16970 | ||
5afb4e99 DJ |
16971 | /* Check whether this DIE is interesting enough to save. Normally |
16972 | we would not be interested in members here, but there may be | |
16973 | later variables referencing them via DW_AT_specification (for | |
16974 | static members). */ | |
16975 | if (!load_all | |
16976 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16977 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
16978 | && abbrev->tag != DW_TAG_enumerator |
16979 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 16980 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 16981 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 16982 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 16983 | && abbrev->tag != DW_TAG_module |
95554aad | 16984 | && abbrev->tag != DW_TAG_member |
74921315 KS |
16985 | && abbrev->tag != DW_TAG_imported_unit |
16986 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
16987 | { |
16988 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16989 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
16990 | continue; |
16991 | } | |
16992 | ||
dee91e82 DE |
16993 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
16994 | info_ptr); | |
72bf9492 DJ |
16995 | |
16996 | /* This two-pass algorithm for processing partial symbols has a | |
16997 | high cost in cache pressure. Thus, handle some simple cases | |
16998 | here which cover the majority of C partial symbols. DIEs | |
16999 | which neither have specification tags in them, nor could have | |
17000 | specification tags elsewhere pointing at them, can simply be | |
17001 | processed and discarded. | |
17002 | ||
17003 | This segment is also optional; scan_partial_symbols and | |
17004 | add_partial_symbol will handle these DIEs if we chain | |
17005 | them in normally. When compilers which do not emit large | |
17006 | quantities of duplicate debug information are more common, | |
17007 | this code can probably be removed. */ | |
17008 | ||
17009 | /* Any complete simple types at the top level (pretty much all | |
17010 | of them, for a language without namespaces), can be processed | |
17011 | directly. */ | |
17012 | if (parent_die == NULL | |
17013 | && part_die->has_specification == 0 | |
17014 | && part_die->is_declaration == 0 | |
d8228535 | 17015 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
17016 | || part_die->tag == DW_TAG_base_type |
17017 | || part_die->tag == DW_TAG_subrange_type)) | |
17018 | { | |
17019 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 17020 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 17021 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 17022 | &objfile->static_psymbols, |
1762568f | 17023 | 0, cu->language, objfile); |
dee91e82 | 17024 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
17025 | continue; |
17026 | } | |
17027 | ||
d8228535 JK |
17028 | /* The exception for DW_TAG_typedef with has_children above is |
17029 | a workaround of GCC PR debug/47510. In the case of this complaint | |
17030 | type_name_no_tag_or_error will error on such types later. | |
17031 | ||
17032 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
17033 | it could not find the child DIEs referenced later, this is checked | |
17034 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
17035 | ||
17036 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
17037 | complaint (&symfile_complaints, | |
17038 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
17039 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 17040 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 17041 | |
72bf9492 DJ |
17042 | /* If we're at the second level, and we're an enumerator, and |
17043 | our parent has no specification (meaning possibly lives in a | |
17044 | namespace elsewhere), then we can add the partial symbol now | |
17045 | instead of queueing it. */ | |
17046 | if (part_die->tag == DW_TAG_enumerator | |
17047 | && parent_die != NULL | |
17048 | && parent_die->die_parent == NULL | |
17049 | && parent_die->tag == DW_TAG_enumeration_type | |
17050 | && parent_die->has_specification == 0) | |
17051 | { | |
17052 | if (part_die->name == NULL) | |
3e43a32a MS |
17053 | complaint (&symfile_complaints, |
17054 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 17055 | else if (building_psymtab) |
04a679b8 | 17056 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 17057 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 17058 | cu->language == language_cplus |
bb5ed363 DE |
17059 | ? &objfile->global_psymbols |
17060 | : &objfile->static_psymbols, | |
1762568f | 17061 | 0, cu->language, objfile); |
72bf9492 | 17062 | |
dee91e82 | 17063 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
17064 | continue; |
17065 | } | |
17066 | ||
17067 | /* We'll save this DIE so link it in. */ | |
17068 | part_die->die_parent = parent_die; | |
17069 | part_die->die_sibling = NULL; | |
17070 | part_die->die_child = NULL; | |
17071 | ||
17072 | if (last_die && last_die == parent_die) | |
17073 | last_die->die_child = part_die; | |
17074 | else if (last_die) | |
17075 | last_die->die_sibling = part_die; | |
17076 | ||
17077 | last_die = part_die; | |
17078 | ||
17079 | if (first_die == NULL) | |
17080 | first_die = part_die; | |
17081 | ||
17082 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
17083 | find interesting need to be in the hash table, because we | |
17084 | also have the parent/sibling/child chains; only those that we | |
17085 | might refer to by offset later during partial symbol reading. | |
17086 | ||
17087 | For now this means things that might have be the target of a | |
17088 | DW_AT_specification, DW_AT_abstract_origin, or | |
17089 | DW_AT_extension. DW_AT_extension will refer only to | |
17090 | namespaces; DW_AT_abstract_origin refers to functions (and | |
17091 | many things under the function DIE, but we do not recurse | |
17092 | into function DIEs during partial symbol reading) and | |
17093 | possibly variables as well; DW_AT_specification refers to | |
17094 | declarations. Declarations ought to have the DW_AT_declaration | |
17095 | flag. It happens that GCC forgets to put it in sometimes, but | |
17096 | only for functions, not for types. | |
17097 | ||
17098 | Adding more things than necessary to the hash table is harmless | |
17099 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
17100 | wasted time in find_partial_die, when we reread the compilation |
17101 | unit with load_all_dies set. */ | |
72bf9492 | 17102 | |
5afb4e99 | 17103 | if (load_all |
72929c62 | 17104 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 17105 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
17106 | || abbrev->tag == DW_TAG_variable |
17107 | || abbrev->tag == DW_TAG_namespace | |
17108 | || part_die->is_declaration) | |
17109 | { | |
17110 | void **slot; | |
17111 | ||
17112 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
17113 | to_underlying (part_die->sect_off), |
17114 | INSERT); | |
72bf9492 DJ |
17115 | *slot = part_die; |
17116 | } | |
17117 | ||
8d749320 | 17118 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
17119 | |
17120 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 17121 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
17122 | languages we have to, so that we can get at method physnames |
17123 | to infer fully qualified class names, for DW_AT_specification, | |
17124 | and for C++ template arguments. For C++, we also look one level | |
17125 | inside functions to find template arguments (if the name of the | |
17126 | function does not already contain the template arguments). | |
bc30ff58 JB |
17127 | |
17128 | For Ada, we need to scan the children of subprograms and lexical | |
17129 | blocks as well because Ada allows the definition of nested | |
17130 | entities that could be interesting for the debugger, such as | |
17131 | nested subprograms for instance. */ | |
72bf9492 | 17132 | if (last_die->has_children |
5afb4e99 DJ |
17133 | && (load_all |
17134 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 17135 | || last_die->tag == DW_TAG_module |
72bf9492 | 17136 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
17137 | || (cu->language == language_cplus |
17138 | && last_die->tag == DW_TAG_subprogram | |
17139 | && (last_die->name == NULL | |
17140 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
17141 | || (cu->language != language_c |
17142 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 17143 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 17144 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
17145 | || last_die->tag == DW_TAG_union_type)) |
17146 | || (cu->language == language_ada | |
17147 | && (last_die->tag == DW_TAG_subprogram | |
17148 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
17149 | { |
17150 | nesting_level++; | |
17151 | parent_die = last_die; | |
17152 | continue; | |
17153 | } | |
17154 | ||
17155 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17156 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
17157 | |
17158 | /* Back to the top, do it again. */ | |
17159 | } | |
17160 | } | |
17161 | ||
c906108c SS |
17162 | /* Read a minimal amount of information into the minimal die structure. */ |
17163 | ||
d521ce57 | 17164 | static const gdb_byte * |
dee91e82 DE |
17165 | read_partial_die (const struct die_reader_specs *reader, |
17166 | struct partial_die_info *part_die, | |
17167 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 17168 | const gdb_byte *info_ptr) |
c906108c | 17169 | { |
dee91e82 | 17170 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 17171 | struct objfile *objfile = cu->objfile; |
d521ce57 | 17172 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 17173 | unsigned int i; |
c906108c | 17174 | struct attribute attr; |
c5aa993b | 17175 | int has_low_pc_attr = 0; |
c906108c | 17176 | int has_high_pc_attr = 0; |
91da1414 | 17177 | int high_pc_relative = 0; |
c906108c | 17178 | |
72bf9492 | 17179 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 17180 | |
9c541725 | 17181 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
17182 | |
17183 | info_ptr += abbrev_len; | |
17184 | ||
17185 | if (abbrev == NULL) | |
17186 | return info_ptr; | |
17187 | ||
c906108c SS |
17188 | part_die->tag = abbrev->tag; |
17189 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
17190 | |
17191 | for (i = 0; i < abbrev->num_attrs; ++i) | |
17192 | { | |
dee91e82 | 17193 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
17194 | |
17195 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 17196 | partial symbol table. */ |
c906108c SS |
17197 | switch (attr.name) |
17198 | { | |
17199 | case DW_AT_name: | |
71c25dea TT |
17200 | switch (part_die->tag) |
17201 | { | |
17202 | case DW_TAG_compile_unit: | |
95554aad | 17203 | case DW_TAG_partial_unit: |
348e048f | 17204 | case DW_TAG_type_unit: |
71c25dea TT |
17205 | /* Compilation units have a DW_AT_name that is a filename, not |
17206 | a source language identifier. */ | |
17207 | case DW_TAG_enumeration_type: | |
17208 | case DW_TAG_enumerator: | |
17209 | /* These tags always have simple identifiers already; no need | |
17210 | to canonicalize them. */ | |
17211 | part_die->name = DW_STRING (&attr); | |
17212 | break; | |
17213 | default: | |
17214 | part_die->name | |
17215 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 17216 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
17217 | break; |
17218 | } | |
c906108c | 17219 | break; |
31ef98ae | 17220 | case DW_AT_linkage_name: |
c906108c | 17221 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
17222 | /* Note that both forms of linkage name might appear. We |
17223 | assume they will be the same, and we only store the last | |
17224 | one we see. */ | |
94af9270 KS |
17225 | if (cu->language == language_ada) |
17226 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 17227 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
17228 | break; |
17229 | case DW_AT_low_pc: | |
17230 | has_low_pc_attr = 1; | |
31aa7e4e | 17231 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
17232 | break; |
17233 | case DW_AT_high_pc: | |
17234 | has_high_pc_attr = 1; | |
31aa7e4e JB |
17235 | part_die->highpc = attr_value_as_address (&attr); |
17236 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
17237 | high_pc_relative = 1; | |
c906108c SS |
17238 | break; |
17239 | case DW_AT_location: | |
0963b4bd | 17240 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
17241 | if (attr_form_is_block (&attr)) |
17242 | { | |
95554aad | 17243 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 17244 | } |
3690dd37 | 17245 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 17246 | { |
4d3c2250 | 17247 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
17248 | } |
17249 | else | |
17250 | { | |
4d3c2250 KB |
17251 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
17252 | "partial symbol information"); | |
8e19ed76 | 17253 | } |
c906108c | 17254 | break; |
c906108c SS |
17255 | case DW_AT_external: |
17256 | part_die->is_external = DW_UNSND (&attr); | |
17257 | break; | |
17258 | case DW_AT_declaration: | |
17259 | part_die->is_declaration = DW_UNSND (&attr); | |
17260 | break; | |
17261 | case DW_AT_type: | |
17262 | part_die->has_type = 1; | |
17263 | break; | |
17264 | case DW_AT_abstract_origin: | |
17265 | case DW_AT_specification: | |
72bf9492 DJ |
17266 | case DW_AT_extension: |
17267 | part_die->has_specification = 1; | |
c764a876 | 17268 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17269 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17270 | || cu->per_cu->is_dwz); | |
c906108c SS |
17271 | break; |
17272 | case DW_AT_sibling: | |
17273 | /* Ignore absolute siblings, they might point outside of | |
17274 | the current compile unit. */ | |
17275 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
17276 | complaint (&symfile_complaints, |
17277 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 17278 | else |
b9502d3f | 17279 | { |
9c541725 PA |
17280 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
17281 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
17282 | |
17283 | if (sibling_ptr < info_ptr) | |
17284 | complaint (&symfile_complaints, | |
17285 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
17286 | else if (sibling_ptr > reader->buffer_end) |
17287 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
17288 | else |
17289 | part_die->sibling = sibling_ptr; | |
17290 | } | |
c906108c | 17291 | break; |
fa4028e9 JB |
17292 | case DW_AT_byte_size: |
17293 | part_die->has_byte_size = 1; | |
17294 | break; | |
ff908ebf AW |
17295 | case DW_AT_const_value: |
17296 | part_die->has_const_value = 1; | |
17297 | break; | |
68511cec CES |
17298 | case DW_AT_calling_convention: |
17299 | /* DWARF doesn't provide a way to identify a program's source-level | |
17300 | entry point. DW_AT_calling_convention attributes are only meant | |
17301 | to describe functions' calling conventions. | |
17302 | ||
17303 | However, because it's a necessary piece of information in | |
0c1b455e TT |
17304 | Fortran, and before DWARF 4 DW_CC_program was the only |
17305 | piece of debugging information whose definition refers to | |
17306 | a 'main program' at all, several compilers marked Fortran | |
17307 | main programs with DW_CC_program --- even when those | |
17308 | functions use the standard calling conventions. | |
17309 | ||
17310 | Although DWARF now specifies a way to provide this | |
17311 | information, we support this practice for backward | |
17312 | compatibility. */ | |
68511cec | 17313 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
17314 | && cu->language == language_fortran) |
17315 | part_die->main_subprogram = 1; | |
68511cec | 17316 | break; |
481860b3 GB |
17317 | case DW_AT_inline: |
17318 | if (DW_UNSND (&attr) == DW_INL_inlined | |
17319 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
17320 | part_die->may_be_inlined = 1; | |
17321 | break; | |
95554aad TT |
17322 | |
17323 | case DW_AT_import: | |
17324 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 17325 | { |
9c541725 | 17326 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17327 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17328 | || cu->per_cu->is_dwz); | |
17329 | } | |
95554aad TT |
17330 | break; |
17331 | ||
0c1b455e TT |
17332 | case DW_AT_main_subprogram: |
17333 | part_die->main_subprogram = DW_UNSND (&attr); | |
17334 | break; | |
17335 | ||
c906108c SS |
17336 | default: |
17337 | break; | |
17338 | } | |
17339 | } | |
17340 | ||
91da1414 MW |
17341 | if (high_pc_relative) |
17342 | part_die->highpc += part_die->lowpc; | |
17343 | ||
9373cf26 JK |
17344 | if (has_low_pc_attr && has_high_pc_attr) |
17345 | { | |
17346 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
17347 | eliminate duplicate copies of functions and vtables and such. | |
17348 | The linker will arbitrarily choose one and discard the others. | |
17349 | The AT_*_pc values for such functions refer to local labels in | |
17350 | these sections. If the section from that file was discarded, the | |
17351 | labels are not in the output, so the relocs get a value of 0. | |
17352 | If this is a discarded function, mark the pc bounds as invalid, | |
17353 | so that GDB will ignore it. */ | |
17354 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
17355 | { | |
bb5ed363 | 17356 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17357 | |
17358 | complaint (&symfile_complaints, | |
17359 | _("DW_AT_low_pc %s is zero " | |
17360 | "for DIE at 0x%x [in module %s]"), | |
17361 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 17362 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
17363 | } |
17364 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
17365 | else if (part_die->lowpc >= part_die->highpc) | |
17366 | { | |
bb5ed363 | 17367 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17368 | |
17369 | complaint (&symfile_complaints, | |
17370 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
17371 | "for DIE at 0x%x [in module %s]"), | |
17372 | paddress (gdbarch, part_die->lowpc), | |
17373 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
17374 | to_underlying (part_die->sect_off), |
17375 | objfile_name (objfile)); | |
9373cf26 JK |
17376 | } |
17377 | else | |
17378 | part_die->has_pc_info = 1; | |
17379 | } | |
85cbf3d3 | 17380 | |
c906108c SS |
17381 | return info_ptr; |
17382 | } | |
17383 | ||
72bf9492 DJ |
17384 | /* Find a cached partial DIE at OFFSET in CU. */ |
17385 | ||
17386 | static struct partial_die_info * | |
9c541725 | 17387 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
17388 | { |
17389 | struct partial_die_info *lookup_die = NULL; | |
17390 | struct partial_die_info part_die; | |
17391 | ||
9c541725 | 17392 | part_die.sect_off = sect_off; |
9a3c8263 SM |
17393 | lookup_die = ((struct partial_die_info *) |
17394 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 17395 | to_underlying (sect_off))); |
72bf9492 | 17396 | |
72bf9492 DJ |
17397 | return lookup_die; |
17398 | } | |
17399 | ||
348e048f DE |
17400 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
17401 | except in the case of .debug_types DIEs which do not reference | |
17402 | outside their CU (they do however referencing other types via | |
55f1336d | 17403 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
17404 | |
17405 | static struct partial_die_info * | |
9c541725 | 17406 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 17407 | { |
bb5ed363 | 17408 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
17409 | struct dwarf2_per_cu_data *per_cu = NULL; |
17410 | struct partial_die_info *pd = NULL; | |
72bf9492 | 17411 | |
36586728 | 17412 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 17413 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 17414 | { |
9c541725 | 17415 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
17416 | if (pd != NULL) |
17417 | return pd; | |
0d99eb77 DE |
17418 | /* We missed recording what we needed. |
17419 | Load all dies and try again. */ | |
17420 | per_cu = cu->per_cu; | |
5afb4e99 | 17421 | } |
0d99eb77 DE |
17422 | else |
17423 | { | |
17424 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 17425 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 17426 | { |
9c541725 PA |
17427 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
17428 | " external reference to offset 0x%x [in module %s].\n"), | |
17429 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
17430 | bfd_get_filename (objfile->obfd)); |
17431 | } | |
9c541725 | 17432 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 17433 | objfile); |
72bf9492 | 17434 | |
0d99eb77 DE |
17435 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
17436 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 17437 | |
0d99eb77 | 17438 | per_cu->cu->last_used = 0; |
9c541725 | 17439 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 17440 | } |
5afb4e99 | 17441 | |
dee91e82 DE |
17442 | /* If we didn't find it, and not all dies have been loaded, |
17443 | load them all and try again. */ | |
17444 | ||
5afb4e99 DJ |
17445 | if (pd == NULL && per_cu->load_all_dies == 0) |
17446 | { | |
5afb4e99 | 17447 | per_cu->load_all_dies = 1; |
fd820528 DE |
17448 | |
17449 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
17450 | THIS_CU->cu may already be in use. So we can't just free it and | |
17451 | replace its DIEs with the ones we read in. Instead, we leave those | |
17452 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
17453 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
17454 | set. */ | |
dee91e82 | 17455 | load_partial_comp_unit (per_cu); |
5afb4e99 | 17456 | |
9c541725 | 17457 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
17458 | } |
17459 | ||
17460 | if (pd == NULL) | |
17461 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
17462 | _("could not find partial DIE 0x%x " |
17463 | "in cache [from module %s]\n"), | |
9c541725 | 17464 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 17465 | return pd; |
72bf9492 DJ |
17466 | } |
17467 | ||
abc72ce4 DE |
17468 | /* See if we can figure out if the class lives in a namespace. We do |
17469 | this by looking for a member function; its demangled name will | |
17470 | contain namespace info, if there is any. */ | |
17471 | ||
17472 | static void | |
17473 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
17474 | struct dwarf2_cu *cu) | |
17475 | { | |
17476 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
17477 | what template types look like, because the demangler | |
17478 | frequently doesn't give the same name as the debug info. We | |
17479 | could fix this by only using the demangled name to get the | |
17480 | prefix (but see comment in read_structure_type). */ | |
17481 | ||
17482 | struct partial_die_info *real_pdi; | |
17483 | struct partial_die_info *child_pdi; | |
17484 | ||
17485 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
17486 | we should not do this. We'll prepend the parent's fully qualified | |
17487 | name when we create the partial symbol. */ | |
17488 | ||
17489 | real_pdi = struct_pdi; | |
17490 | while (real_pdi->has_specification) | |
36586728 TT |
17491 | real_pdi = find_partial_die (real_pdi->spec_offset, |
17492 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
17493 | |
17494 | if (real_pdi->die_parent != NULL) | |
17495 | return; | |
17496 | ||
17497 | for (child_pdi = struct_pdi->die_child; | |
17498 | child_pdi != NULL; | |
17499 | child_pdi = child_pdi->die_sibling) | |
17500 | { | |
17501 | if (child_pdi->tag == DW_TAG_subprogram | |
17502 | && child_pdi->linkage_name != NULL) | |
17503 | { | |
17504 | char *actual_class_name | |
17505 | = language_class_name_from_physname (cu->language_defn, | |
17506 | child_pdi->linkage_name); | |
17507 | if (actual_class_name != NULL) | |
17508 | { | |
17509 | struct_pdi->name | |
224c3ddb SM |
17510 | = ((const char *) |
17511 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17512 | actual_class_name, | |
17513 | strlen (actual_class_name))); | |
abc72ce4 DE |
17514 | xfree (actual_class_name); |
17515 | } | |
17516 | break; | |
17517 | } | |
17518 | } | |
17519 | } | |
17520 | ||
72bf9492 DJ |
17521 | /* Adjust PART_DIE before generating a symbol for it. This function |
17522 | may set the is_external flag or change the DIE's name. */ | |
17523 | ||
17524 | static void | |
17525 | fixup_partial_die (struct partial_die_info *part_die, | |
17526 | struct dwarf2_cu *cu) | |
17527 | { | |
abc72ce4 DE |
17528 | /* Once we've fixed up a die, there's no point in doing so again. |
17529 | This also avoids a memory leak if we were to call | |
17530 | guess_partial_die_structure_name multiple times. */ | |
17531 | if (part_die->fixup_called) | |
17532 | return; | |
17533 | ||
72bf9492 DJ |
17534 | /* If we found a reference attribute and the DIE has no name, try |
17535 | to find a name in the referred to DIE. */ | |
17536 | ||
17537 | if (part_die->name == NULL && part_die->has_specification) | |
17538 | { | |
17539 | struct partial_die_info *spec_die; | |
72bf9492 | 17540 | |
36586728 TT |
17541 | spec_die = find_partial_die (part_die->spec_offset, |
17542 | part_die->spec_is_dwz, cu); | |
72bf9492 | 17543 | |
10b3939b | 17544 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
17545 | |
17546 | if (spec_die->name) | |
17547 | { | |
17548 | part_die->name = spec_die->name; | |
17549 | ||
17550 | /* Copy DW_AT_external attribute if it is set. */ | |
17551 | if (spec_die->is_external) | |
17552 | part_die->is_external = spec_die->is_external; | |
17553 | } | |
17554 | } | |
17555 | ||
17556 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
17557 | |
17558 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 17559 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 17560 | |
abc72ce4 DE |
17561 | /* If there is no parent die to provide a namespace, and there are |
17562 | children, see if we can determine the namespace from their linkage | |
122d1940 | 17563 | name. */ |
abc72ce4 | 17564 | if (cu->language == language_cplus |
8b70b953 | 17565 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17566 | && part_die->die_parent == NULL |
17567 | && part_die->has_children | |
17568 | && (part_die->tag == DW_TAG_class_type | |
17569 | || part_die->tag == DW_TAG_structure_type | |
17570 | || part_die->tag == DW_TAG_union_type)) | |
17571 | guess_partial_die_structure_name (part_die, cu); | |
17572 | ||
53832f31 TT |
17573 | /* GCC might emit a nameless struct or union that has a linkage |
17574 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17575 | if (part_die->name == NULL | |
96408a79 SA |
17576 | && (part_die->tag == DW_TAG_class_type |
17577 | || part_die->tag == DW_TAG_interface_type | |
17578 | || part_die->tag == DW_TAG_structure_type | |
17579 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
17580 | && part_die->linkage_name != NULL) |
17581 | { | |
17582 | char *demangled; | |
17583 | ||
8de20a37 | 17584 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
17585 | if (demangled) |
17586 | { | |
96408a79 SA |
17587 | const char *base; |
17588 | ||
17589 | /* Strip any leading namespaces/classes, keep only the base name. | |
17590 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17591 | base = strrchr (demangled, ':'); | |
17592 | if (base && base > demangled && base[-1] == ':') | |
17593 | base++; | |
17594 | else | |
17595 | base = demangled; | |
17596 | ||
34a68019 | 17597 | part_die->name |
224c3ddb SM |
17598 | = ((const char *) |
17599 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17600 | base, strlen (base))); | |
53832f31 TT |
17601 | xfree (demangled); |
17602 | } | |
17603 | } | |
17604 | ||
abc72ce4 | 17605 | part_die->fixup_called = 1; |
72bf9492 DJ |
17606 | } |
17607 | ||
a8329558 | 17608 | /* Read an attribute value described by an attribute form. */ |
c906108c | 17609 | |
d521ce57 | 17610 | static const gdb_byte * |
dee91e82 DE |
17611 | read_attribute_value (const struct die_reader_specs *reader, |
17612 | struct attribute *attr, unsigned form, | |
43988095 | 17613 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 17614 | { |
dee91e82 | 17615 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
17616 | struct objfile *objfile = cu->objfile; |
17617 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 17618 | bfd *abfd = reader->abfd; |
e7c27a73 | 17619 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17620 | unsigned int bytes_read; |
17621 | struct dwarf_block *blk; | |
17622 | ||
aead7601 | 17623 | attr->form = (enum dwarf_form) form; |
a8329558 | 17624 | switch (form) |
c906108c | 17625 | { |
c906108c | 17626 | case DW_FORM_ref_addr: |
ae411497 | 17627 | if (cu->header.version == 2) |
4568ecf9 | 17628 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 17629 | else |
4568ecf9 DE |
17630 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
17631 | &cu->header, &bytes_read); | |
ae411497 TT |
17632 | info_ptr += bytes_read; |
17633 | break; | |
36586728 TT |
17634 | case DW_FORM_GNU_ref_alt: |
17635 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17636 | info_ptr += bytes_read; | |
17637 | break; | |
ae411497 | 17638 | case DW_FORM_addr: |
e7c27a73 | 17639 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 17640 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 17641 | info_ptr += bytes_read; |
c906108c SS |
17642 | break; |
17643 | case DW_FORM_block2: | |
7b5a2f43 | 17644 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17645 | blk->size = read_2_bytes (abfd, info_ptr); |
17646 | info_ptr += 2; | |
17647 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17648 | info_ptr += blk->size; | |
17649 | DW_BLOCK (attr) = blk; | |
17650 | break; | |
17651 | case DW_FORM_block4: | |
7b5a2f43 | 17652 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17653 | blk->size = read_4_bytes (abfd, info_ptr); |
17654 | info_ptr += 4; | |
17655 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17656 | info_ptr += blk->size; | |
17657 | DW_BLOCK (attr) = blk; | |
17658 | break; | |
17659 | case DW_FORM_data2: | |
17660 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
17661 | info_ptr += 2; | |
17662 | break; | |
17663 | case DW_FORM_data4: | |
17664 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
17665 | info_ptr += 4; | |
17666 | break; | |
17667 | case DW_FORM_data8: | |
17668 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
17669 | info_ptr += 8; | |
17670 | break; | |
0224619f JK |
17671 | case DW_FORM_data16: |
17672 | blk = dwarf_alloc_block (cu); | |
17673 | blk->size = 16; | |
17674 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
17675 | info_ptr += 16; | |
17676 | DW_BLOCK (attr) = blk; | |
17677 | break; | |
2dc7f7b3 TT |
17678 | case DW_FORM_sec_offset: |
17679 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17680 | info_ptr += bytes_read; | |
17681 | break; | |
c906108c | 17682 | case DW_FORM_string: |
9b1c24c8 | 17683 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 17684 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
17685 | info_ptr += bytes_read; |
17686 | break; | |
4bdf3d34 | 17687 | case DW_FORM_strp: |
36586728 TT |
17688 | if (!cu->per_cu->is_dwz) |
17689 | { | |
17690 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
17691 | &bytes_read); | |
17692 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17693 | info_ptr += bytes_read; | |
17694 | break; | |
17695 | } | |
17696 | /* FALLTHROUGH */ | |
43988095 JK |
17697 | case DW_FORM_line_strp: |
17698 | if (!cu->per_cu->is_dwz) | |
17699 | { | |
17700 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
17701 | cu_header, &bytes_read); | |
17702 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17703 | info_ptr += bytes_read; | |
17704 | break; | |
17705 | } | |
17706 | /* FALLTHROUGH */ | |
36586728 TT |
17707 | case DW_FORM_GNU_strp_alt: |
17708 | { | |
17709 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17710 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
17711 | &bytes_read); | |
17712 | ||
17713 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
17714 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17715 | info_ptr += bytes_read; | |
17716 | } | |
4bdf3d34 | 17717 | break; |
2dc7f7b3 | 17718 | case DW_FORM_exprloc: |
c906108c | 17719 | case DW_FORM_block: |
7b5a2f43 | 17720 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17721 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17722 | info_ptr += bytes_read; | |
17723 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17724 | info_ptr += blk->size; | |
17725 | DW_BLOCK (attr) = blk; | |
17726 | break; | |
17727 | case DW_FORM_block1: | |
7b5a2f43 | 17728 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17729 | blk->size = read_1_byte (abfd, info_ptr); |
17730 | info_ptr += 1; | |
17731 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17732 | info_ptr += blk->size; | |
17733 | DW_BLOCK (attr) = blk; | |
17734 | break; | |
17735 | case DW_FORM_data1: | |
17736 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17737 | info_ptr += 1; | |
17738 | break; | |
17739 | case DW_FORM_flag: | |
17740 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17741 | info_ptr += 1; | |
17742 | break; | |
2dc7f7b3 TT |
17743 | case DW_FORM_flag_present: |
17744 | DW_UNSND (attr) = 1; | |
17745 | break; | |
c906108c SS |
17746 | case DW_FORM_sdata: |
17747 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17748 | info_ptr += bytes_read; | |
17749 | break; | |
17750 | case DW_FORM_udata: | |
17751 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17752 | info_ptr += bytes_read; | |
17753 | break; | |
17754 | case DW_FORM_ref1: | |
9c541725 | 17755 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17756 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
17757 | info_ptr += 1; |
17758 | break; | |
17759 | case DW_FORM_ref2: | |
9c541725 | 17760 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17761 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
17762 | info_ptr += 2; |
17763 | break; | |
17764 | case DW_FORM_ref4: | |
9c541725 | 17765 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17766 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
17767 | info_ptr += 4; |
17768 | break; | |
613e1657 | 17769 | case DW_FORM_ref8: |
9c541725 | 17770 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17771 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
17772 | info_ptr += 8; |
17773 | break; | |
55f1336d | 17774 | case DW_FORM_ref_sig8: |
ac9ec31b | 17775 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
17776 | info_ptr += 8; |
17777 | break; | |
c906108c | 17778 | case DW_FORM_ref_udata: |
9c541725 | 17779 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17780 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
17781 | info_ptr += bytes_read; |
17782 | break; | |
c906108c | 17783 | case DW_FORM_indirect: |
a8329558 KW |
17784 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17785 | info_ptr += bytes_read; | |
43988095 JK |
17786 | if (form == DW_FORM_implicit_const) |
17787 | { | |
17788 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17789 | info_ptr += bytes_read; | |
17790 | } | |
17791 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
17792 | info_ptr); | |
17793 | break; | |
17794 | case DW_FORM_implicit_const: | |
17795 | DW_SND (attr) = implicit_const; | |
a8329558 | 17796 | break; |
3019eac3 DE |
17797 | case DW_FORM_GNU_addr_index: |
17798 | if (reader->dwo_file == NULL) | |
17799 | { | |
17800 | /* For now flag a hard error. | |
17801 | Later we can turn this into a complaint. */ | |
17802 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17803 | dwarf_form_name (form), | |
17804 | bfd_get_filename (abfd)); | |
17805 | } | |
17806 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
17807 | info_ptr += bytes_read; | |
17808 | break; | |
17809 | case DW_FORM_GNU_str_index: | |
17810 | if (reader->dwo_file == NULL) | |
17811 | { | |
17812 | /* For now flag a hard error. | |
17813 | Later we can turn this into a complaint if warranted. */ | |
17814 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17815 | dwarf_form_name (form), | |
17816 | bfd_get_filename (abfd)); | |
17817 | } | |
17818 | { | |
17819 | ULONGEST str_index = | |
17820 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17821 | ||
342587c4 | 17822 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
17823 | DW_STRING_IS_CANONICAL (attr) = 0; |
17824 | info_ptr += bytes_read; | |
17825 | } | |
17826 | break; | |
c906108c | 17827 | default: |
8a3fe4f8 | 17828 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
17829 | dwarf_form_name (form), |
17830 | bfd_get_filename (abfd)); | |
c906108c | 17831 | } |
28e94949 | 17832 | |
36586728 | 17833 | /* Super hack. */ |
7771576e | 17834 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
17835 | attr->form = DW_FORM_GNU_ref_alt; |
17836 | ||
28e94949 JB |
17837 | /* We have seen instances where the compiler tried to emit a byte |
17838 | size attribute of -1 which ended up being encoded as an unsigned | |
17839 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
17840 | an object of this size seems pretty unlikely so we can relatively | |
17841 | safely treat these cases as if the size attribute was invalid and | |
17842 | treat them as zero by default. */ | |
17843 | if (attr->name == DW_AT_byte_size | |
17844 | && form == DW_FORM_data4 | |
17845 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
17846 | { |
17847 | complaint | |
17848 | (&symfile_complaints, | |
43bbcdc2 PH |
17849 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
17850 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
17851 | DW_UNSND (attr) = 0; |
17852 | } | |
28e94949 | 17853 | |
c906108c SS |
17854 | return info_ptr; |
17855 | } | |
17856 | ||
a8329558 KW |
17857 | /* Read an attribute described by an abbreviated attribute. */ |
17858 | ||
d521ce57 | 17859 | static const gdb_byte * |
dee91e82 DE |
17860 | read_attribute (const struct die_reader_specs *reader, |
17861 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 17862 | const gdb_byte *info_ptr) |
a8329558 KW |
17863 | { |
17864 | attr->name = abbrev->name; | |
43988095 JK |
17865 | return read_attribute_value (reader, attr, abbrev->form, |
17866 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
17867 | } |
17868 | ||
0963b4bd | 17869 | /* Read dwarf information from a buffer. */ |
c906108c SS |
17870 | |
17871 | static unsigned int | |
a1855c1d | 17872 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17873 | { |
fe1b8b76 | 17874 | return bfd_get_8 (abfd, buf); |
c906108c SS |
17875 | } |
17876 | ||
17877 | static int | |
a1855c1d | 17878 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17879 | { |
fe1b8b76 | 17880 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
17881 | } |
17882 | ||
17883 | static unsigned int | |
a1855c1d | 17884 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17885 | { |
fe1b8b76 | 17886 | return bfd_get_16 (abfd, buf); |
c906108c SS |
17887 | } |
17888 | ||
21ae7a4d | 17889 | static int |
a1855c1d | 17890 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17891 | { |
17892 | return bfd_get_signed_16 (abfd, buf); | |
17893 | } | |
17894 | ||
c906108c | 17895 | static unsigned int |
a1855c1d | 17896 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17897 | { |
fe1b8b76 | 17898 | return bfd_get_32 (abfd, buf); |
c906108c SS |
17899 | } |
17900 | ||
21ae7a4d | 17901 | static int |
a1855c1d | 17902 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17903 | { |
17904 | return bfd_get_signed_32 (abfd, buf); | |
17905 | } | |
17906 | ||
93311388 | 17907 | static ULONGEST |
a1855c1d | 17908 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17909 | { |
fe1b8b76 | 17910 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17911 | } |
17912 | ||
17913 | static CORE_ADDR | |
d521ce57 | 17914 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17915 | unsigned int *bytes_read) |
c906108c | 17916 | { |
e7c27a73 | 17917 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17918 | CORE_ADDR retval = 0; |
17919 | ||
107d2387 | 17920 | if (cu_header->signed_addr_p) |
c906108c | 17921 | { |
107d2387 AC |
17922 | switch (cu_header->addr_size) |
17923 | { | |
17924 | case 2: | |
fe1b8b76 | 17925 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17926 | break; |
17927 | case 4: | |
fe1b8b76 | 17928 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17929 | break; |
17930 | case 8: | |
fe1b8b76 | 17931 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17932 | break; |
17933 | default: | |
8e65ff28 | 17934 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17935 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17936 | bfd_get_filename (abfd)); |
107d2387 AC |
17937 | } |
17938 | } | |
17939 | else | |
17940 | { | |
17941 | switch (cu_header->addr_size) | |
17942 | { | |
17943 | case 2: | |
fe1b8b76 | 17944 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17945 | break; |
17946 | case 4: | |
fe1b8b76 | 17947 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17948 | break; |
17949 | case 8: | |
fe1b8b76 | 17950 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17951 | break; |
17952 | default: | |
8e65ff28 | 17953 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17954 | _("read_address: bad switch, " |
17955 | "unsigned [in module %s]"), | |
659b0389 | 17956 | bfd_get_filename (abfd)); |
107d2387 | 17957 | } |
c906108c | 17958 | } |
64367e0a | 17959 | |
107d2387 AC |
17960 | *bytes_read = cu_header->addr_size; |
17961 | return retval; | |
c906108c SS |
17962 | } |
17963 | ||
f7ef9339 | 17964 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17965 | specification allows the initial length to take up either 4 bytes |
17966 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17967 | bytes describe the length and all offsets will be 8 bytes in length | |
17968 | instead of 4. | |
17969 | ||
f7ef9339 KB |
17970 | An older, non-standard 64-bit format is also handled by this |
17971 | function. The older format in question stores the initial length | |
17972 | as an 8-byte quantity without an escape value. Lengths greater | |
17973 | than 2^32 aren't very common which means that the initial 4 bytes | |
17974 | is almost always zero. Since a length value of zero doesn't make | |
17975 | sense for the 32-bit format, this initial zero can be considered to | |
17976 | be an escape value which indicates the presence of the older 64-bit | |
17977 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
17978 | greater than 4GB. If it becomes necessary to handle lengths |
17979 | somewhat larger than 4GB, we could allow other small values (such | |
17980 | as the non-sensical values of 1, 2, and 3) to also be used as | |
17981 | escape values indicating the presence of the old format. | |
f7ef9339 | 17982 | |
917c78fc MK |
17983 | The value returned via bytes_read should be used to increment the |
17984 | relevant pointer after calling read_initial_length(). | |
c764a876 | 17985 | |
613e1657 KB |
17986 | [ Note: read_initial_length() and read_offset() are based on the |
17987 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 17988 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
17989 | from: |
17990 | ||
f7ef9339 | 17991 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 17992 | |
613e1657 KB |
17993 | This document is only a draft and is subject to change. (So beware.) |
17994 | ||
f7ef9339 | 17995 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
17996 | determined empirically by examining 64-bit ELF files produced by |
17997 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
17998 | |
17999 | - Kevin, July 16, 2002 | |
613e1657 KB |
18000 | ] */ |
18001 | ||
18002 | static LONGEST | |
d521ce57 | 18003 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 18004 | { |
fe1b8b76 | 18005 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 18006 | |
dd373385 | 18007 | if (length == 0xffffffff) |
613e1657 | 18008 | { |
fe1b8b76 | 18009 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 18010 | *bytes_read = 12; |
613e1657 | 18011 | } |
dd373385 | 18012 | else if (length == 0) |
f7ef9339 | 18013 | { |
dd373385 | 18014 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 18015 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 18016 | *bytes_read = 8; |
f7ef9339 | 18017 | } |
613e1657 KB |
18018 | else |
18019 | { | |
18020 | *bytes_read = 4; | |
613e1657 KB |
18021 | } |
18022 | ||
c764a876 DE |
18023 | return length; |
18024 | } | |
dd373385 | 18025 | |
c764a876 DE |
18026 | /* Cover function for read_initial_length. |
18027 | Returns the length of the object at BUF, and stores the size of the | |
18028 | initial length in *BYTES_READ and stores the size that offsets will be in | |
18029 | *OFFSET_SIZE. | |
18030 | If the initial length size is not equivalent to that specified in | |
18031 | CU_HEADER then issue a complaint. | |
18032 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 18033 | |
c764a876 | 18034 | static LONGEST |
d521ce57 | 18035 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
18036 | const struct comp_unit_head *cu_header, |
18037 | unsigned int *bytes_read, | |
18038 | unsigned int *offset_size) | |
18039 | { | |
18040 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
18041 | ||
18042 | gdb_assert (cu_header->initial_length_size == 4 | |
18043 | || cu_header->initial_length_size == 8 | |
18044 | || cu_header->initial_length_size == 12); | |
18045 | ||
18046 | if (cu_header->initial_length_size != *bytes_read) | |
18047 | complaint (&symfile_complaints, | |
18048 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 18049 | |
c764a876 | 18050 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 18051 | return length; |
613e1657 KB |
18052 | } |
18053 | ||
18054 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 18055 | given by cu_header->offset_size. */ |
613e1657 KB |
18056 | |
18057 | static LONGEST | |
d521ce57 TT |
18058 | read_offset (bfd *abfd, const gdb_byte *buf, |
18059 | const struct comp_unit_head *cu_header, | |
891d2f0b | 18060 | unsigned int *bytes_read) |
c764a876 DE |
18061 | { |
18062 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 18063 | |
c764a876 DE |
18064 | *bytes_read = cu_header->offset_size; |
18065 | return offset; | |
18066 | } | |
18067 | ||
18068 | /* Read an offset from the data stream. */ | |
18069 | ||
18070 | static LONGEST | |
d521ce57 | 18071 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
18072 | { |
18073 | LONGEST retval = 0; | |
18074 | ||
c764a876 | 18075 | switch (offset_size) |
613e1657 KB |
18076 | { |
18077 | case 4: | |
fe1b8b76 | 18078 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
18079 | break; |
18080 | case 8: | |
fe1b8b76 | 18081 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
18082 | break; |
18083 | default: | |
8e65ff28 | 18084 | internal_error (__FILE__, __LINE__, |
c764a876 | 18085 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 18086 | bfd_get_filename (abfd)); |
613e1657 KB |
18087 | } |
18088 | ||
917c78fc | 18089 | return retval; |
613e1657 KB |
18090 | } |
18091 | ||
d521ce57 TT |
18092 | static const gdb_byte * |
18093 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
18094 | { |
18095 | /* If the size of a host char is 8 bits, we can return a pointer | |
18096 | to the buffer, otherwise we have to copy the data to a buffer | |
18097 | allocated on the temporary obstack. */ | |
4bdf3d34 | 18098 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 18099 | return buf; |
c906108c SS |
18100 | } |
18101 | ||
d521ce57 TT |
18102 | static const char * |
18103 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
18104 | unsigned int *bytes_read_ptr) | |
c906108c SS |
18105 | { |
18106 | /* If the size of a host char is 8 bits, we can return a pointer | |
18107 | to the string, otherwise we have to copy the string to a buffer | |
18108 | allocated on the temporary obstack. */ | |
4bdf3d34 | 18109 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
18110 | if (*buf == '\0') |
18111 | { | |
18112 | *bytes_read_ptr = 1; | |
18113 | return NULL; | |
18114 | } | |
d521ce57 TT |
18115 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
18116 | return (const char *) buf; | |
4bdf3d34 JJ |
18117 | } |
18118 | ||
43988095 JK |
18119 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
18120 | reporting strings FORM_NAME and SECT_NAME. */ | |
18121 | ||
d521ce57 | 18122 | static const char * |
43988095 JK |
18123 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
18124 | struct dwarf2_section_info *sect, | |
18125 | const char *form_name, | |
18126 | const char *sect_name) | |
18127 | { | |
18128 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
18129 | if (sect->buffer == NULL) | |
18130 | error (_("%s used without %s section [in module %s]"), | |
18131 | form_name, sect_name, bfd_get_filename (abfd)); | |
18132 | if (str_offset >= sect->size) | |
18133 | error (_("%s pointing outside of %s section [in module %s]"), | |
18134 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 18135 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 18136 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 18137 | return NULL; |
43988095 JK |
18138 | return (const char *) (sect->buffer + str_offset); |
18139 | } | |
18140 | ||
18141 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
18142 | ||
18143 | static const char * | |
18144 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
18145 | { | |
18146 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
18147 | &dwarf2_per_objfile->str, | |
18148 | "DW_FORM_strp", ".debug_str"); | |
18149 | } | |
18150 | ||
18151 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
18152 | ||
18153 | static const char * | |
18154 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
18155 | { | |
18156 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
18157 | &dwarf2_per_objfile->line_str, | |
18158 | "DW_FORM_line_strp", | |
18159 | ".debug_line_str"); | |
c906108c SS |
18160 | } |
18161 | ||
36586728 TT |
18162 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
18163 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
18164 | the string consists of a single NUL byte, return NULL; otherwise | |
18165 | return a pointer to the string. */ | |
18166 | ||
d521ce57 | 18167 | static const char * |
36586728 TT |
18168 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
18169 | { | |
18170 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
18171 | ||
18172 | if (dwz->str.buffer == NULL) | |
18173 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
18174 | "section [in module %s]"), | |
18175 | bfd_get_filename (dwz->dwz_bfd)); | |
18176 | if (str_offset >= dwz->str.size) | |
18177 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
18178 | ".debug_str section [in module %s]"), | |
18179 | bfd_get_filename (dwz->dwz_bfd)); | |
18180 | gdb_assert (HOST_CHAR_BIT == 8); | |
18181 | if (dwz->str.buffer[str_offset] == '\0') | |
18182 | return NULL; | |
d521ce57 | 18183 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
18184 | } |
18185 | ||
43988095 JK |
18186 | /* Return pointer to string at .debug_str offset as read from BUF. |
18187 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18188 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18189 | ||
d521ce57 TT |
18190 | static const char * |
18191 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
18192 | const struct comp_unit_head *cu_header, |
18193 | unsigned int *bytes_read_ptr) | |
18194 | { | |
18195 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
18196 | ||
18197 | return read_indirect_string_at_offset (abfd, str_offset); | |
18198 | } | |
18199 | ||
43988095 JK |
18200 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
18201 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18202 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18203 | ||
18204 | static const char * | |
18205 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
18206 | const struct comp_unit_head *cu_header, | |
18207 | unsigned int *bytes_read_ptr) | |
18208 | { | |
18209 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
18210 | ||
18211 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
18212 | } | |
18213 | ||
18214 | ULONGEST | |
d521ce57 | 18215 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 18216 | unsigned int *bytes_read_ptr) |
c906108c | 18217 | { |
12df843f | 18218 | ULONGEST result; |
ce5d95e1 | 18219 | unsigned int num_read; |
870f88f7 | 18220 | int shift; |
c906108c SS |
18221 | unsigned char byte; |
18222 | ||
18223 | result = 0; | |
18224 | shift = 0; | |
18225 | num_read = 0; | |
c906108c SS |
18226 | while (1) |
18227 | { | |
fe1b8b76 | 18228 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
18229 | buf++; |
18230 | num_read++; | |
12df843f | 18231 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
18232 | if ((byte & 128) == 0) |
18233 | { | |
18234 | break; | |
18235 | } | |
18236 | shift += 7; | |
18237 | } | |
18238 | *bytes_read_ptr = num_read; | |
18239 | return result; | |
18240 | } | |
18241 | ||
12df843f | 18242 | static LONGEST |
d521ce57 TT |
18243 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
18244 | unsigned int *bytes_read_ptr) | |
c906108c | 18245 | { |
12df843f | 18246 | LONGEST result; |
870f88f7 | 18247 | int shift, num_read; |
c906108c SS |
18248 | unsigned char byte; |
18249 | ||
18250 | result = 0; | |
18251 | shift = 0; | |
c906108c | 18252 | num_read = 0; |
c906108c SS |
18253 | while (1) |
18254 | { | |
fe1b8b76 | 18255 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
18256 | buf++; |
18257 | num_read++; | |
12df843f | 18258 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
18259 | shift += 7; |
18260 | if ((byte & 128) == 0) | |
18261 | { | |
18262 | break; | |
18263 | } | |
18264 | } | |
77e0b926 | 18265 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 18266 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
18267 | *bytes_read_ptr = num_read; |
18268 | return result; | |
18269 | } | |
18270 | ||
3019eac3 DE |
18271 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18272 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
18273 | ADDR_SIZE is the size of addresses from the CU header. */ | |
18274 | ||
18275 | static CORE_ADDR | |
18276 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
18277 | { | |
18278 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18279 | bfd *abfd = objfile->obfd; | |
18280 | const gdb_byte *info_ptr; | |
18281 | ||
18282 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
18283 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
18284 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 18285 | objfile_name (objfile)); |
3019eac3 DE |
18286 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
18287 | error (_("DW_FORM_addr_index pointing outside of " | |
18288 | ".debug_addr section [in module %s]"), | |
4262abfb | 18289 | objfile_name (objfile)); |
3019eac3 DE |
18290 | info_ptr = (dwarf2_per_objfile->addr.buffer |
18291 | + addr_base + addr_index * addr_size); | |
18292 | if (addr_size == 4) | |
18293 | return bfd_get_32 (abfd, info_ptr); | |
18294 | else | |
18295 | return bfd_get_64 (abfd, info_ptr); | |
18296 | } | |
18297 | ||
18298 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
18299 | ||
18300 | static CORE_ADDR | |
18301 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
18302 | { | |
18303 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
18304 | } | |
18305 | ||
18306 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
18307 | ||
18308 | static CORE_ADDR | |
d521ce57 | 18309 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
18310 | unsigned int *bytes_read) |
18311 | { | |
18312 | bfd *abfd = cu->objfile->obfd; | |
18313 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
18314 | ||
18315 | return read_addr_index (cu, addr_index); | |
18316 | } | |
18317 | ||
18318 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
18319 | back to dwarf2_read_addr_index. */ | |
18320 | ||
18321 | struct dwarf2_read_addr_index_data | |
18322 | { | |
18323 | ULONGEST addr_base; | |
18324 | int addr_size; | |
18325 | }; | |
18326 | ||
18327 | /* die_reader_func for dwarf2_read_addr_index. */ | |
18328 | ||
18329 | static void | |
18330 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 18331 | const gdb_byte *info_ptr, |
3019eac3 DE |
18332 | struct die_info *comp_unit_die, |
18333 | int has_children, | |
18334 | void *data) | |
18335 | { | |
18336 | struct dwarf2_cu *cu = reader->cu; | |
18337 | struct dwarf2_read_addr_index_data *aidata = | |
18338 | (struct dwarf2_read_addr_index_data *) data; | |
18339 | ||
18340 | aidata->addr_base = cu->addr_base; | |
18341 | aidata->addr_size = cu->header.addr_size; | |
18342 | } | |
18343 | ||
18344 | /* Given an index in .debug_addr, fetch the value. | |
18345 | NOTE: This can be called during dwarf expression evaluation, | |
18346 | long after the debug information has been read, and thus per_cu->cu | |
18347 | may no longer exist. */ | |
18348 | ||
18349 | CORE_ADDR | |
18350 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
18351 | unsigned int addr_index) | |
18352 | { | |
18353 | struct objfile *objfile = per_cu->objfile; | |
18354 | struct dwarf2_cu *cu = per_cu->cu; | |
18355 | ULONGEST addr_base; | |
18356 | int addr_size; | |
18357 | ||
18358 | /* This is intended to be called from outside this file. */ | |
18359 | dw2_setup (objfile); | |
18360 | ||
18361 | /* We need addr_base and addr_size. | |
18362 | If we don't have PER_CU->cu, we have to get it. | |
18363 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18364 | which at this point doesn't seem justified: it's not clear how frequently | |
18365 | it would get used and it would increase the size of every PER_CU. | |
18366 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18367 | so we're not in uncharted territory here. | |
18368 | Alas we need to be a bit more complicated as addr_base is contained | |
18369 | in the DIE. | |
18370 | ||
18371 | We don't need to read the entire CU(/TU). | |
18372 | We just need the header and top level die. | |
a1b64ce1 | 18373 | |
3019eac3 | 18374 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18375 | For now we skip this optimization. */ |
3019eac3 DE |
18376 | |
18377 | if (cu != NULL) | |
18378 | { | |
18379 | addr_base = cu->addr_base; | |
18380 | addr_size = cu->header.addr_size; | |
18381 | } | |
18382 | else | |
18383 | { | |
18384 | struct dwarf2_read_addr_index_data aidata; | |
18385 | ||
a1b64ce1 DE |
18386 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
18387 | we need addr_base. */ | |
18388 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
18389 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
18390 | addr_base = aidata.addr_base; |
18391 | addr_size = aidata.addr_size; | |
18392 | } | |
18393 | ||
18394 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
18395 | } | |
18396 | ||
57d63ce2 DE |
18397 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
18398 | This is only used by the Fission support. */ | |
3019eac3 | 18399 | |
d521ce57 | 18400 | static const char * |
342587c4 | 18401 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
18402 | { |
18403 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 18404 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18405 | bfd *abfd = objfile->obfd; |
342587c4 | 18406 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
18407 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
18408 | struct dwarf2_section_info *str_offsets_section = | |
18409 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 18410 | const gdb_byte *info_ptr; |
3019eac3 | 18411 | ULONGEST str_offset; |
57d63ce2 | 18412 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 18413 | |
73869dc2 DE |
18414 | dwarf2_read_section (objfile, str_section); |
18415 | dwarf2_read_section (objfile, str_offsets_section); | |
18416 | if (str_section->buffer == NULL) | |
57d63ce2 | 18417 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
18418 | " in CU at offset 0x%x [in module %s]"), |
18419 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18420 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 18421 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
18422 | " in CU at offset 0x%x [in module %s]"), |
18423 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18424 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 18425 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
18426 | " section in CU at offset 0x%x [in module %s]"), |
18427 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18428 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
18429 | + str_index * cu->header.offset_size); |
18430 | if (cu->header.offset_size == 4) | |
18431 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18432 | else | |
18433 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18434 | if (str_offset >= str_section->size) |
57d63ce2 | 18435 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
18436 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
18437 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18438 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
18439 | } |
18440 | ||
3019eac3 DE |
18441 | /* Return the length of an LEB128 number in BUF. */ |
18442 | ||
18443 | static int | |
18444 | leb128_size (const gdb_byte *buf) | |
18445 | { | |
18446 | const gdb_byte *begin = buf; | |
18447 | gdb_byte byte; | |
18448 | ||
18449 | while (1) | |
18450 | { | |
18451 | byte = *buf++; | |
18452 | if ((byte & 128) == 0) | |
18453 | return buf - begin; | |
18454 | } | |
18455 | } | |
18456 | ||
c906108c | 18457 | static void |
e142c38c | 18458 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
18459 | { |
18460 | switch (lang) | |
18461 | { | |
18462 | case DW_LANG_C89: | |
76bee0cc | 18463 | case DW_LANG_C99: |
0cfd832f | 18464 | case DW_LANG_C11: |
c906108c | 18465 | case DW_LANG_C: |
d1be3247 | 18466 | case DW_LANG_UPC: |
e142c38c | 18467 | cu->language = language_c; |
c906108c | 18468 | break; |
9c37b5ae | 18469 | case DW_LANG_Java: |
c906108c | 18470 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
18471 | case DW_LANG_C_plus_plus_11: |
18472 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 18473 | cu->language = language_cplus; |
c906108c | 18474 | break; |
6aecb9c2 JB |
18475 | case DW_LANG_D: |
18476 | cu->language = language_d; | |
18477 | break; | |
c906108c SS |
18478 | case DW_LANG_Fortran77: |
18479 | case DW_LANG_Fortran90: | |
b21b22e0 | 18480 | case DW_LANG_Fortran95: |
f7de9aab MW |
18481 | case DW_LANG_Fortran03: |
18482 | case DW_LANG_Fortran08: | |
e142c38c | 18483 | cu->language = language_fortran; |
c906108c | 18484 | break; |
a766d390 DE |
18485 | case DW_LANG_Go: |
18486 | cu->language = language_go; | |
18487 | break; | |
c906108c | 18488 | case DW_LANG_Mips_Assembler: |
e142c38c | 18489 | cu->language = language_asm; |
c906108c SS |
18490 | break; |
18491 | case DW_LANG_Ada83: | |
8aaf0b47 | 18492 | case DW_LANG_Ada95: |
bc5f45f8 JB |
18493 | cu->language = language_ada; |
18494 | break; | |
72019c9c GM |
18495 | case DW_LANG_Modula2: |
18496 | cu->language = language_m2; | |
18497 | break; | |
fe8e67fd PM |
18498 | case DW_LANG_Pascal83: |
18499 | cu->language = language_pascal; | |
18500 | break; | |
22566fbd DJ |
18501 | case DW_LANG_ObjC: |
18502 | cu->language = language_objc; | |
18503 | break; | |
c44af4eb TT |
18504 | case DW_LANG_Rust: |
18505 | case DW_LANG_Rust_old: | |
18506 | cu->language = language_rust; | |
18507 | break; | |
c906108c SS |
18508 | case DW_LANG_Cobol74: |
18509 | case DW_LANG_Cobol85: | |
c906108c | 18510 | default: |
e142c38c | 18511 | cu->language = language_minimal; |
c906108c SS |
18512 | break; |
18513 | } | |
e142c38c | 18514 | cu->language_defn = language_def (cu->language); |
c906108c SS |
18515 | } |
18516 | ||
18517 | /* Return the named attribute or NULL if not there. */ | |
18518 | ||
18519 | static struct attribute * | |
e142c38c | 18520 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 18521 | { |
a48e046c | 18522 | for (;;) |
c906108c | 18523 | { |
a48e046c TT |
18524 | unsigned int i; |
18525 | struct attribute *spec = NULL; | |
18526 | ||
18527 | for (i = 0; i < die->num_attrs; ++i) | |
18528 | { | |
18529 | if (die->attrs[i].name == name) | |
18530 | return &die->attrs[i]; | |
18531 | if (die->attrs[i].name == DW_AT_specification | |
18532 | || die->attrs[i].name == DW_AT_abstract_origin) | |
18533 | spec = &die->attrs[i]; | |
18534 | } | |
18535 | ||
18536 | if (!spec) | |
18537 | break; | |
c906108c | 18538 | |
f2f0e013 | 18539 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 18540 | } |
c5aa993b | 18541 | |
c906108c SS |
18542 | return NULL; |
18543 | } | |
18544 | ||
348e048f DE |
18545 | /* Return the named attribute or NULL if not there, |
18546 | but do not follow DW_AT_specification, etc. | |
18547 | This is for use in contexts where we're reading .debug_types dies. | |
18548 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
18549 | back up the chain, and we want to go down. */ | |
18550 | ||
18551 | static struct attribute * | |
45e58e77 | 18552 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
18553 | { |
18554 | unsigned int i; | |
18555 | ||
18556 | for (i = 0; i < die->num_attrs; ++i) | |
18557 | if (die->attrs[i].name == name) | |
18558 | return &die->attrs[i]; | |
18559 | ||
18560 | return NULL; | |
18561 | } | |
18562 | ||
7d45c7c3 KB |
18563 | /* Return the string associated with a string-typed attribute, or NULL if it |
18564 | is either not found or is of an incorrect type. */ | |
18565 | ||
18566 | static const char * | |
18567 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
18568 | { | |
18569 | struct attribute *attr; | |
18570 | const char *str = NULL; | |
18571 | ||
18572 | attr = dwarf2_attr (die, name, cu); | |
18573 | ||
18574 | if (attr != NULL) | |
18575 | { | |
43988095 | 18576 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
18577 | || attr->form == DW_FORM_string |
18578 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 18579 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
18580 | str = DW_STRING (attr); |
18581 | else | |
18582 | complaint (&symfile_complaints, | |
18583 | _("string type expected for attribute %s for " | |
18584 | "DIE at 0x%x in module %s"), | |
9c541725 | 18585 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
18586 | objfile_name (cu->objfile)); |
18587 | } | |
18588 | ||
18589 | return str; | |
18590 | } | |
18591 | ||
05cf31d1 JB |
18592 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
18593 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 18594 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
18595 | |
18596 | static int | |
18597 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
18598 | { | |
18599 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
18600 | ||
18601 | return (attr && DW_UNSND (attr)); | |
18602 | } | |
18603 | ||
3ca72b44 | 18604 | static int |
e142c38c | 18605 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 18606 | { |
05cf31d1 JB |
18607 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
18608 | which value is non-zero. However, we have to be careful with | |
18609 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
18610 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
18611 | end up accidently finding a declaration attribute that belongs | |
18612 | to a different DIE referenced by the specification attribute, | |
18613 | even though the given DIE does not have a declaration attribute. */ | |
18614 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
18615 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
18616 | } |
18617 | ||
63d06c5c | 18618 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 18619 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
18620 | containing the return value on output. If there is no |
18621 | specification, but there is an abstract origin, that is | |
18622 | returned. */ | |
63d06c5c DC |
18623 | |
18624 | static struct die_info * | |
f2f0e013 | 18625 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 18626 | { |
f2f0e013 DJ |
18627 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
18628 | *spec_cu); | |
63d06c5c | 18629 | |
edb3359d DJ |
18630 | if (spec_attr == NULL) |
18631 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
18632 | ||
63d06c5c DC |
18633 | if (spec_attr == NULL) |
18634 | return NULL; | |
18635 | else | |
f2f0e013 | 18636 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 18637 | } |
c906108c | 18638 | |
527f3840 JK |
18639 | /* Stub for free_line_header to match void * callback types. */ |
18640 | ||
18641 | static void | |
18642 | free_line_header_voidp (void *arg) | |
18643 | { | |
9a3c8263 | 18644 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 18645 | |
fff8551c | 18646 | delete lh; |
527f3840 JK |
18647 | } |
18648 | ||
fff8551c PA |
18649 | void |
18650 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 18651 | { |
27e0867f | 18652 | if (dwarf_line_debug >= 2) |
fff8551c PA |
18653 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
18654 | include_dirs.size () + 1, include_dir); | |
27e0867f | 18655 | |
fff8551c | 18656 | include_dirs.push_back (include_dir); |
debd256d | 18657 | } |
6e70227d | 18658 | |
fff8551c PA |
18659 | void |
18660 | line_header::add_file_name (const char *name, | |
ecfb656c | 18661 | dir_index d_index, |
fff8551c PA |
18662 | unsigned int mod_time, |
18663 | unsigned int length) | |
debd256d | 18664 | { |
27e0867f DE |
18665 | if (dwarf_line_debug >= 2) |
18666 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 18667 | (unsigned) file_names.size () + 1, name); |
27e0867f | 18668 | |
ecfb656c | 18669 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 18670 | } |
6e70227d | 18671 | |
83769d0b | 18672 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
18673 | |
18674 | static struct dwarf2_section_info * | |
18675 | get_debug_line_section (struct dwarf2_cu *cu) | |
18676 | { | |
18677 | struct dwarf2_section_info *section; | |
18678 | ||
18679 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
18680 | DWO file. */ | |
18681 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
18682 | section = &cu->dwo_unit->dwo_file->sections.line; | |
18683 | else if (cu->per_cu->is_dwz) | |
18684 | { | |
18685 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18686 | ||
18687 | section = &dwz->line; | |
18688 | } | |
18689 | else | |
18690 | section = &dwarf2_per_objfile->line; | |
18691 | ||
18692 | return section; | |
18693 | } | |
18694 | ||
43988095 JK |
18695 | /* Read directory or file name entry format, starting with byte of |
18696 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
18697 | entries count and the entries themselves in the described entry | |
18698 | format. */ | |
18699 | ||
18700 | static void | |
18701 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
18702 | struct line_header *lh, | |
18703 | const struct comp_unit_head *cu_header, | |
18704 | void (*callback) (struct line_header *lh, | |
18705 | const char *name, | |
ecfb656c | 18706 | dir_index d_index, |
43988095 JK |
18707 | unsigned int mod_time, |
18708 | unsigned int length)) | |
18709 | { | |
18710 | gdb_byte format_count, formati; | |
18711 | ULONGEST data_count, datai; | |
18712 | const gdb_byte *buf = *bufp; | |
18713 | const gdb_byte *format_header_data; | |
43988095 JK |
18714 | unsigned int bytes_read; |
18715 | ||
18716 | format_count = read_1_byte (abfd, buf); | |
18717 | buf += 1; | |
18718 | format_header_data = buf; | |
18719 | for (formati = 0; formati < format_count; formati++) | |
18720 | { | |
18721 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18722 | buf += bytes_read; | |
18723 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18724 | buf += bytes_read; | |
18725 | } | |
18726 | ||
18727 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18728 | buf += bytes_read; | |
18729 | for (datai = 0; datai < data_count; datai++) | |
18730 | { | |
18731 | const gdb_byte *format = format_header_data; | |
18732 | struct file_entry fe; | |
18733 | ||
43988095 JK |
18734 | for (formati = 0; formati < format_count; formati++) |
18735 | { | |
ecfb656c | 18736 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18737 | format += bytes_read; |
43988095 | 18738 | |
ecfb656c | 18739 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18740 | format += bytes_read; |
ecfb656c PA |
18741 | |
18742 | gdb::optional<const char *> string; | |
18743 | gdb::optional<unsigned int> uint; | |
18744 | ||
43988095 JK |
18745 | switch (form) |
18746 | { | |
18747 | case DW_FORM_string: | |
ecfb656c | 18748 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
18749 | buf += bytes_read; |
18750 | break; | |
18751 | ||
18752 | case DW_FORM_line_strp: | |
ecfb656c PA |
18753 | string.emplace (read_indirect_line_string (abfd, buf, |
18754 | cu_header, | |
18755 | &bytes_read)); | |
43988095 JK |
18756 | buf += bytes_read; |
18757 | break; | |
18758 | ||
18759 | case DW_FORM_data1: | |
ecfb656c | 18760 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
18761 | buf += 1; |
18762 | break; | |
18763 | ||
18764 | case DW_FORM_data2: | |
ecfb656c | 18765 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
18766 | buf += 2; |
18767 | break; | |
18768 | ||
18769 | case DW_FORM_data4: | |
ecfb656c | 18770 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
18771 | buf += 4; |
18772 | break; | |
18773 | ||
18774 | case DW_FORM_data8: | |
ecfb656c | 18775 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
18776 | buf += 8; |
18777 | break; | |
18778 | ||
18779 | case DW_FORM_udata: | |
ecfb656c | 18780 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
18781 | buf += bytes_read; |
18782 | break; | |
18783 | ||
18784 | case DW_FORM_block: | |
18785 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
18786 | current GDB. */ | |
18787 | break; | |
18788 | } | |
ecfb656c PA |
18789 | |
18790 | switch (content_type) | |
18791 | { | |
18792 | case DW_LNCT_path: | |
18793 | if (string.has_value ()) | |
18794 | fe.name = *string; | |
18795 | break; | |
18796 | case DW_LNCT_directory_index: | |
18797 | if (uint.has_value ()) | |
18798 | fe.d_index = (dir_index) *uint; | |
18799 | break; | |
18800 | case DW_LNCT_timestamp: | |
18801 | if (uint.has_value ()) | |
18802 | fe.mod_time = *uint; | |
18803 | break; | |
18804 | case DW_LNCT_size: | |
18805 | if (uint.has_value ()) | |
18806 | fe.length = *uint; | |
18807 | break; | |
18808 | case DW_LNCT_MD5: | |
18809 | break; | |
18810 | default: | |
18811 | complaint (&symfile_complaints, | |
18812 | _("Unknown format content type %s"), | |
18813 | pulongest (content_type)); | |
18814 | } | |
43988095 JK |
18815 | } |
18816 | ||
ecfb656c | 18817 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
18818 | } |
18819 | ||
18820 | *bufp = buf; | |
18821 | } | |
18822 | ||
debd256d | 18823 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 18824 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 18825 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
18826 | Returns NULL if there is a problem reading the header, e.g., if it |
18827 | has a version we don't understand. | |
debd256d JB |
18828 | |
18829 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
18830 | the returned object point into the dwarf line section buffer, |
18831 | and must not be freed. */ | |
ae2de4f8 | 18832 | |
fff8551c | 18833 | static line_header_up |
9c541725 | 18834 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 18835 | { |
d521ce57 | 18836 | const gdb_byte *line_ptr; |
c764a876 | 18837 | unsigned int bytes_read, offset_size; |
debd256d | 18838 | int i; |
d521ce57 | 18839 | const char *cur_dir, *cur_file; |
3019eac3 DE |
18840 | struct dwarf2_section_info *section; |
18841 | bfd *abfd; | |
18842 | ||
36586728 | 18843 | section = get_debug_line_section (cu); |
3019eac3 DE |
18844 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
18845 | if (section->buffer == NULL) | |
debd256d | 18846 | { |
3019eac3 DE |
18847 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
18848 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
18849 | else | |
18850 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
18851 | return 0; |
18852 | } | |
18853 | ||
fceca515 DE |
18854 | /* We can't do this until we know the section is non-empty. |
18855 | Only then do we know we have such a section. */ | |
a32a8923 | 18856 | abfd = get_section_bfd_owner (section); |
fceca515 | 18857 | |
a738430d MK |
18858 | /* Make sure that at least there's room for the total_length field. |
18859 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 18860 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 18861 | { |
4d3c2250 | 18862 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18863 | return 0; |
18864 | } | |
18865 | ||
fff8551c | 18866 | line_header_up lh (new line_header ()); |
debd256d | 18867 | |
9c541725 | 18868 | lh->sect_off = sect_off; |
527f3840 JK |
18869 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
18870 | ||
9c541725 | 18871 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 18872 | |
a738430d | 18873 | /* Read in the header. */ |
6e70227d | 18874 | lh->total_length = |
c764a876 DE |
18875 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
18876 | &bytes_read, &offset_size); | |
debd256d | 18877 | line_ptr += bytes_read; |
3019eac3 | 18878 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 18879 | { |
4d3c2250 | 18880 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18881 | return 0; |
18882 | } | |
18883 | lh->statement_program_end = line_ptr + lh->total_length; | |
18884 | lh->version = read_2_bytes (abfd, line_ptr); | |
18885 | line_ptr += 2; | |
43988095 | 18886 | if (lh->version > 5) |
cd366ee8 DE |
18887 | { |
18888 | /* This is a version we don't understand. The format could have | |
18889 | changed in ways we don't handle properly so just punt. */ | |
18890 | complaint (&symfile_complaints, | |
18891 | _("unsupported version in .debug_line section")); | |
18892 | return NULL; | |
18893 | } | |
43988095 JK |
18894 | if (lh->version >= 5) |
18895 | { | |
18896 | gdb_byte segment_selector_size; | |
18897 | ||
18898 | /* Skip address size. */ | |
18899 | read_1_byte (abfd, line_ptr); | |
18900 | line_ptr += 1; | |
18901 | ||
18902 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18903 | line_ptr += 1; | |
18904 | if (segment_selector_size != 0) | |
18905 | { | |
18906 | complaint (&symfile_complaints, | |
18907 | _("unsupported segment selector size %u " | |
18908 | "in .debug_line section"), | |
18909 | segment_selector_size); | |
18910 | return NULL; | |
18911 | } | |
18912 | } | |
c764a876 DE |
18913 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18914 | line_ptr += offset_size; | |
debd256d JB |
18915 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18916 | line_ptr += 1; | |
2dc7f7b3 TT |
18917 | if (lh->version >= 4) |
18918 | { | |
18919 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18920 | line_ptr += 1; | |
18921 | } | |
18922 | else | |
18923 | lh->maximum_ops_per_instruction = 1; | |
18924 | ||
18925 | if (lh->maximum_ops_per_instruction == 0) | |
18926 | { | |
18927 | lh->maximum_ops_per_instruction = 1; | |
18928 | complaint (&symfile_complaints, | |
3e43a32a MS |
18929 | _("invalid maximum_ops_per_instruction " |
18930 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18931 | } |
18932 | ||
debd256d JB |
18933 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18934 | line_ptr += 1; | |
18935 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18936 | line_ptr += 1; | |
18937 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18938 | line_ptr += 1; | |
18939 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18940 | line_ptr += 1; | |
fff8551c | 18941 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18942 | |
18943 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18944 | for (i = 1; i < lh->opcode_base; ++i) | |
18945 | { | |
18946 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18947 | line_ptr += 1; | |
18948 | } | |
18949 | ||
43988095 | 18950 | if (lh->version >= 5) |
debd256d | 18951 | { |
43988095 | 18952 | /* Read directory table. */ |
fff8551c PA |
18953 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18954 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18955 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18956 | unsigned int length) |
18957 | { | |
18958 | lh->add_include_dir (name); | |
18959 | }); | |
debd256d | 18960 | |
43988095 | 18961 | /* Read file name table. */ |
fff8551c PA |
18962 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18963 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18964 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18965 | unsigned int length) |
18966 | { | |
ecfb656c | 18967 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18968 | }); |
43988095 JK |
18969 | } |
18970 | else | |
debd256d | 18971 | { |
43988095 JK |
18972 | /* Read directory table. */ |
18973 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18974 | { | |
18975 | line_ptr += bytes_read; | |
fff8551c | 18976 | lh->add_include_dir (cur_dir); |
43988095 | 18977 | } |
debd256d JB |
18978 | line_ptr += bytes_read; |
18979 | ||
43988095 JK |
18980 | /* Read file name table. */ |
18981 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18982 | { | |
ecfb656c PA |
18983 | unsigned int mod_time, length; |
18984 | dir_index d_index; | |
43988095 JK |
18985 | |
18986 | line_ptr += bytes_read; | |
ecfb656c | 18987 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
18988 | line_ptr += bytes_read; |
18989 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18990 | line_ptr += bytes_read; | |
18991 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18992 | line_ptr += bytes_read; | |
18993 | ||
ecfb656c | 18994 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
18995 | } |
18996 | line_ptr += bytes_read; | |
debd256d | 18997 | } |
6e70227d | 18998 | lh->statement_program_start = line_ptr; |
debd256d | 18999 | |
3019eac3 | 19000 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 19001 | complaint (&symfile_complaints, |
3e43a32a MS |
19002 | _("line number info header doesn't " |
19003 | "fit in `.debug_line' section")); | |
debd256d | 19004 | |
debd256d JB |
19005 | return lh; |
19006 | } | |
c906108c | 19007 | |
c6da4cef DE |
19008 | /* Subroutine of dwarf_decode_lines to simplify it. |
19009 | Return the file name of the psymtab for included file FILE_INDEX | |
19010 | in line header LH of PST. | |
19011 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
19012 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
19013 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
19014 | ||
19015 | The function creates dangling cleanup registration. */ | |
c6da4cef | 19016 | |
d521ce57 | 19017 | static const char * |
c6da4cef DE |
19018 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
19019 | const struct partial_symtab *pst, | |
19020 | const char *comp_dir) | |
19021 | { | |
8c43009f | 19022 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
19023 | const char *include_name = fe.name; |
19024 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
19025 | const char *pst_filename; |
19026 | char *copied_name = NULL; | |
c6da4cef DE |
19027 | int file_is_pst; |
19028 | ||
8c43009f | 19029 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
19030 | |
19031 | if (!IS_ABSOLUTE_PATH (include_name) | |
19032 | && (dir_name != NULL || comp_dir != NULL)) | |
19033 | { | |
19034 | /* Avoid creating a duplicate psymtab for PST. | |
19035 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
19036 | Before we do the comparison, however, we need to account | |
19037 | for DIR_NAME and COMP_DIR. | |
19038 | First prepend dir_name (if non-NULL). If we still don't | |
19039 | have an absolute path prepend comp_dir (if non-NULL). | |
19040 | However, the directory we record in the include-file's | |
19041 | psymtab does not contain COMP_DIR (to match the | |
19042 | corresponding symtab(s)). | |
19043 | ||
19044 | Example: | |
19045 | ||
19046 | bash$ cd /tmp | |
19047 | bash$ gcc -g ./hello.c | |
19048 | include_name = "hello.c" | |
19049 | dir_name = "." | |
19050 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
19051 | DW_AT_name = "./hello.c" |
19052 | ||
19053 | */ | |
c6da4cef DE |
19054 | |
19055 | if (dir_name != NULL) | |
19056 | { | |
d521ce57 TT |
19057 | char *tem = concat (dir_name, SLASH_STRING, |
19058 | include_name, (char *)NULL); | |
19059 | ||
19060 | make_cleanup (xfree, tem); | |
19061 | include_name = tem; | |
c6da4cef | 19062 | include_name_to_compare = include_name; |
c6da4cef DE |
19063 | } |
19064 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
19065 | { | |
d521ce57 TT |
19066 | char *tem = concat (comp_dir, SLASH_STRING, |
19067 | include_name, (char *)NULL); | |
19068 | ||
19069 | make_cleanup (xfree, tem); | |
19070 | include_name_to_compare = tem; | |
c6da4cef DE |
19071 | } |
19072 | } | |
19073 | ||
19074 | pst_filename = pst->filename; | |
19075 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
19076 | { | |
72b9f47f TT |
19077 | copied_name = concat (pst->dirname, SLASH_STRING, |
19078 | pst_filename, (char *)NULL); | |
19079 | pst_filename = copied_name; | |
c6da4cef DE |
19080 | } |
19081 | ||
1e3fad37 | 19082 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 19083 | |
72b9f47f TT |
19084 | if (copied_name != NULL) |
19085 | xfree (copied_name); | |
c6da4cef DE |
19086 | |
19087 | if (file_is_pst) | |
19088 | return NULL; | |
19089 | return include_name; | |
19090 | } | |
19091 | ||
d9b3de22 DE |
19092 | /* State machine to track the state of the line number program. */ |
19093 | ||
6f77053d | 19094 | class lnp_state_machine |
d9b3de22 | 19095 | { |
6f77053d PA |
19096 | public: |
19097 | /* Initialize a machine state for the start of a line number | |
19098 | program. */ | |
19099 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
19100 | ||
8c43009f PA |
19101 | file_entry *current_file () |
19102 | { | |
19103 | /* lh->file_names is 0-based, but the file name numbers in the | |
19104 | statement program are 1-based. */ | |
6f77053d PA |
19105 | return m_line_header->file_name_at (m_file); |
19106 | } | |
19107 | ||
19108 | /* Record the line in the state machine. END_SEQUENCE is true if | |
19109 | we're processing the end of a sequence. */ | |
19110 | void record_line (bool end_sequence); | |
19111 | ||
19112 | /* Check address and if invalid nop-out the rest of the lines in this | |
19113 | sequence. */ | |
19114 | void check_line_address (struct dwarf2_cu *cu, | |
19115 | const gdb_byte *line_ptr, | |
19116 | CORE_ADDR lowpc, CORE_ADDR address); | |
19117 | ||
19118 | void handle_set_discriminator (unsigned int discriminator) | |
19119 | { | |
19120 | m_discriminator = discriminator; | |
19121 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
19122 | } | |
19123 | ||
19124 | /* Handle DW_LNE_set_address. */ | |
19125 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
19126 | { | |
19127 | m_op_index = 0; | |
19128 | address += baseaddr; | |
19129 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
19130 | } | |
19131 | ||
19132 | /* Handle DW_LNS_advance_pc. */ | |
19133 | void handle_advance_pc (CORE_ADDR adjust); | |
19134 | ||
19135 | /* Handle a special opcode. */ | |
19136 | void handle_special_opcode (unsigned char op_code); | |
19137 | ||
19138 | /* Handle DW_LNS_advance_line. */ | |
19139 | void handle_advance_line (int line_delta) | |
19140 | { | |
19141 | advance_line (line_delta); | |
19142 | } | |
19143 | ||
19144 | /* Handle DW_LNS_set_file. */ | |
19145 | void handle_set_file (file_name_index file); | |
19146 | ||
19147 | /* Handle DW_LNS_negate_stmt. */ | |
19148 | void handle_negate_stmt () | |
19149 | { | |
19150 | m_is_stmt = !m_is_stmt; | |
19151 | } | |
19152 | ||
19153 | /* Handle DW_LNS_const_add_pc. */ | |
19154 | void handle_const_add_pc (); | |
19155 | ||
19156 | /* Handle DW_LNS_fixed_advance_pc. */ | |
19157 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
19158 | { | |
19159 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19160 | m_op_index = 0; | |
19161 | } | |
19162 | ||
19163 | /* Handle DW_LNS_copy. */ | |
19164 | void handle_copy () | |
19165 | { | |
19166 | record_line (false); | |
19167 | m_discriminator = 0; | |
19168 | } | |
19169 | ||
19170 | /* Handle DW_LNE_end_sequence. */ | |
19171 | void handle_end_sequence () | |
19172 | { | |
19173 | m_record_line_callback = ::record_line; | |
19174 | } | |
19175 | ||
19176 | private: | |
19177 | /* Advance the line by LINE_DELTA. */ | |
19178 | void advance_line (int line_delta) | |
19179 | { | |
19180 | m_line += line_delta; | |
19181 | ||
19182 | if (line_delta != 0) | |
19183 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
19184 | } |
19185 | ||
6f77053d PA |
19186 | gdbarch *m_gdbarch; |
19187 | ||
19188 | /* True if we're recording lines. | |
19189 | Otherwise we're building partial symtabs and are just interested in | |
19190 | finding include files mentioned by the line number program. */ | |
19191 | bool m_record_lines_p; | |
19192 | ||
8c43009f | 19193 | /* The line number header. */ |
6f77053d | 19194 | line_header *m_line_header; |
8c43009f | 19195 | |
6f77053d PA |
19196 | /* These are part of the standard DWARF line number state machine, |
19197 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 19198 | |
6f77053d | 19199 | unsigned char m_op_index = 0; |
8c43009f | 19200 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
19201 | file_name_index m_file = (file_name_index) 1; |
19202 | unsigned int m_line = 1; | |
19203 | ||
19204 | /* These are initialized in the constructor. */ | |
19205 | ||
19206 | CORE_ADDR m_address; | |
19207 | bool m_is_stmt; | |
19208 | unsigned int m_discriminator; | |
d9b3de22 DE |
19209 | |
19210 | /* Additional bits of state we need to track. */ | |
19211 | ||
19212 | /* The last file that we called dwarf2_start_subfile for. | |
19213 | This is only used for TLLs. */ | |
6f77053d | 19214 | unsigned int m_last_file = 0; |
d9b3de22 | 19215 | /* The last file a line number was recorded for. */ |
6f77053d | 19216 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
19217 | |
19218 | /* The function to call to record a line. */ | |
6f77053d | 19219 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
19220 | |
19221 | /* The last line number that was recorded, used to coalesce | |
19222 | consecutive entries for the same line. This can happen, for | |
19223 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
19224 | unsigned int m_last_line = 0; |
19225 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 19226 | }; |
d9b3de22 | 19227 | |
6f77053d PA |
19228 | void |
19229 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
19230 | { | |
19231 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
19232 | / m_line_header->maximum_ops_per_instruction) | |
19233 | * m_line_header->minimum_instruction_length); | |
19234 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19235 | m_op_index = ((m_op_index + adjust) | |
19236 | % m_line_header->maximum_ops_per_instruction); | |
19237 | } | |
d9b3de22 | 19238 | |
6f77053d PA |
19239 | void |
19240 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 19241 | { |
6f77053d PA |
19242 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
19243 | CORE_ADDR addr_adj = (((m_op_index | |
19244 | + (adj_opcode / m_line_header->line_range)) | |
19245 | / m_line_header->maximum_ops_per_instruction) | |
19246 | * m_line_header->minimum_instruction_length); | |
19247 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19248 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
19249 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 19250 | |
6f77053d PA |
19251 | int line_delta = (m_line_header->line_base |
19252 | + (adj_opcode % m_line_header->line_range)); | |
19253 | advance_line (line_delta); | |
19254 | record_line (false); | |
19255 | m_discriminator = 0; | |
19256 | } | |
d9b3de22 | 19257 | |
6f77053d PA |
19258 | void |
19259 | lnp_state_machine::handle_set_file (file_name_index file) | |
19260 | { | |
19261 | m_file = file; | |
19262 | ||
19263 | const file_entry *fe = current_file (); | |
19264 | if (fe == NULL) | |
19265 | dwarf2_debug_line_missing_file_complaint (); | |
19266 | else if (m_record_lines_p) | |
19267 | { | |
19268 | const char *dir = fe->include_dir (m_line_header); | |
19269 | ||
19270 | m_last_subfile = current_subfile; | |
19271 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
19272 | dwarf2_start_subfile (fe->name, dir); | |
19273 | } | |
19274 | } | |
19275 | ||
19276 | void | |
19277 | lnp_state_machine::handle_const_add_pc () | |
19278 | { | |
19279 | CORE_ADDR adjust | |
19280 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
19281 | ||
19282 | CORE_ADDR addr_adj | |
19283 | = (((m_op_index + adjust) | |
19284 | / m_line_header->maximum_ops_per_instruction) | |
19285 | * m_line_header->minimum_instruction_length); | |
19286 | ||
19287 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19288 | m_op_index = ((m_op_index + adjust) | |
19289 | % m_line_header->maximum_ops_per_instruction); | |
19290 | } | |
d9b3de22 | 19291 | |
c91513d8 PP |
19292 | /* Ignore this record_line request. */ |
19293 | ||
19294 | static void | |
19295 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
19296 | { | |
19297 | return; | |
19298 | } | |
19299 | ||
a05a36a5 DE |
19300 | /* Return non-zero if we should add LINE to the line number table. |
19301 | LINE is the line to add, LAST_LINE is the last line that was added, | |
19302 | LAST_SUBFILE is the subfile for LAST_LINE. | |
19303 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
19304 | had a non-zero discriminator. | |
19305 | ||
19306 | We have to be careful in the presence of discriminators. | |
19307 | E.g., for this line: | |
19308 | ||
19309 | for (i = 0; i < 100000; i++); | |
19310 | ||
19311 | clang can emit four line number entries for that one line, | |
19312 | each with a different discriminator. | |
19313 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19314 | ||
19315 | However, we want gdb to coalesce all four entries into one. | |
19316 | Otherwise the user could stepi into the middle of the line and | |
19317 | gdb would get confused about whether the pc really was in the | |
19318 | middle of the line. | |
19319 | ||
19320 | Things are further complicated by the fact that two consecutive | |
19321 | line number entries for the same line is a heuristic used by gcc | |
19322 | to denote the end of the prologue. So we can't just discard duplicate | |
19323 | entries, we have to be selective about it. The heuristic we use is | |
19324 | that we only collapse consecutive entries for the same line if at least | |
19325 | one of those entries has a non-zero discriminator. PR 17276. | |
19326 | ||
19327 | Note: Addresses in the line number state machine can never go backwards | |
19328 | within one sequence, thus this coalescing is ok. */ | |
19329 | ||
19330 | static int | |
19331 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
19332 | int line_has_non_zero_discriminator, | |
19333 | struct subfile *last_subfile) | |
19334 | { | |
19335 | if (current_subfile != last_subfile) | |
19336 | return 1; | |
19337 | if (line != last_line) | |
19338 | return 1; | |
19339 | /* Same line for the same file that we've seen already. | |
19340 | As a last check, for pr 17276, only record the line if the line | |
19341 | has never had a non-zero discriminator. */ | |
19342 | if (!line_has_non_zero_discriminator) | |
19343 | return 1; | |
19344 | return 0; | |
19345 | } | |
19346 | ||
252a6764 DE |
19347 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
19348 | in the line table of subfile SUBFILE. */ | |
19349 | ||
19350 | static void | |
d9b3de22 DE |
19351 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
19352 | unsigned int line, CORE_ADDR address, | |
19353 | record_line_ftype p_record_line) | |
252a6764 DE |
19354 | { |
19355 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19356 | ||
27e0867f DE |
19357 | if (dwarf_line_debug) |
19358 | { | |
19359 | fprintf_unfiltered (gdb_stdlog, | |
19360 | "Recording line %u, file %s, address %s\n", | |
19361 | line, lbasename (subfile->name), | |
19362 | paddress (gdbarch, address)); | |
19363 | } | |
19364 | ||
d5962de5 | 19365 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
19366 | } |
19367 | ||
19368 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19369 | Mark the end of a set of line number records. | |
d9b3de22 | 19370 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19371 | If SUBFILE is NULL the request is ignored. */ |
19372 | ||
19373 | static void | |
19374 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
19375 | CORE_ADDR address, record_line_ftype p_record_line) | |
19376 | { | |
27e0867f DE |
19377 | if (subfile == NULL) |
19378 | return; | |
19379 | ||
19380 | if (dwarf_line_debug) | |
19381 | { | |
19382 | fprintf_unfiltered (gdb_stdlog, | |
19383 | "Finishing current line, file %s, address %s\n", | |
19384 | lbasename (subfile->name), | |
19385 | paddress (gdbarch, address)); | |
19386 | } | |
19387 | ||
d9b3de22 DE |
19388 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
19389 | } | |
19390 | ||
6f77053d PA |
19391 | void |
19392 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19393 | { |
d9b3de22 DE |
19394 | if (dwarf_line_debug) |
19395 | { | |
19396 | fprintf_unfiltered (gdb_stdlog, | |
19397 | "Processing actual line %u: file %u," | |
19398 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
19399 | m_line, to_underlying (m_file), |
19400 | paddress (m_gdbarch, m_address), | |
19401 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
19402 | } |
19403 | ||
6f77053d | 19404 | file_entry *fe = current_file (); |
8c43009f PA |
19405 | |
19406 | if (fe == NULL) | |
d9b3de22 DE |
19407 | dwarf2_debug_line_missing_file_complaint (); |
19408 | /* For now we ignore lines not starting on an instruction boundary. | |
19409 | But not when processing end_sequence for compatibility with the | |
19410 | previous version of the code. */ | |
6f77053d | 19411 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 19412 | { |
8c43009f | 19413 | fe->included_p = 1; |
6f77053d | 19414 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 19415 | { |
6f77053d | 19416 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 19417 | { |
6f77053d PA |
19418 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
19419 | m_address, m_record_line_callback); | |
d9b3de22 DE |
19420 | } |
19421 | ||
19422 | if (!end_sequence) | |
19423 | { | |
6f77053d PA |
19424 | if (dwarf_record_line_p (m_line, m_last_line, |
19425 | m_line_has_non_zero_discriminator, | |
19426 | m_last_subfile)) | |
d9b3de22 | 19427 | { |
6f77053d PA |
19428 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
19429 | m_line, m_address, | |
19430 | m_record_line_callback); | |
d9b3de22 | 19431 | } |
6f77053d PA |
19432 | m_last_subfile = current_subfile; |
19433 | m_last_line = m_line; | |
d9b3de22 DE |
19434 | } |
19435 | } | |
19436 | } | |
19437 | } | |
19438 | ||
6f77053d PA |
19439 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
19440 | bool record_lines_p) | |
d9b3de22 | 19441 | { |
6f77053d PA |
19442 | m_gdbarch = arch; |
19443 | m_record_lines_p = record_lines_p; | |
19444 | m_line_header = lh; | |
d9b3de22 | 19445 | |
6f77053d | 19446 | m_record_line_callback = ::record_line; |
d9b3de22 | 19447 | |
d9b3de22 DE |
19448 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
19449 | was a line entry for it so that the backend has a chance to adjust it | |
19450 | and also record it in case it needs it. This is currently used by MIPS | |
19451 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
19452 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
19453 | m_is_stmt = lh->default_is_stmt; | |
19454 | m_discriminator = 0; | |
252a6764 DE |
19455 | } |
19456 | ||
6f77053d PA |
19457 | void |
19458 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
19459 | const gdb_byte *line_ptr, | |
19460 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
19461 | { |
19462 | /* If address < lowpc then it's not a usable value, it's outside the | |
19463 | pc range of the CU. However, we restrict the test to only address | |
19464 | values of zero to preserve GDB's previous behaviour which is to | |
19465 | handle the specific case of a function being GC'd by the linker. */ | |
19466 | ||
19467 | if (address == 0 && address < lowpc) | |
19468 | { | |
19469 | /* This line table is for a function which has been | |
19470 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
19471 | ||
19472 | struct objfile *objfile = cu->objfile; | |
19473 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
19474 | ||
19475 | complaint (&symfile_complaints, | |
19476 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
19477 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
19478 | m_record_line_callback = noop_record_line; |
19479 | /* Note: record_line_callback is left as noop_record_line until | |
19480 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
19481 | } |
19482 | } | |
19483 | ||
f3f5162e | 19484 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
19485 | Process the line number information in LH. |
19486 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
19487 | program in order to set included_p for every referenced header. */ | |
debd256d | 19488 | |
c906108c | 19489 | static void |
43f3e411 DE |
19490 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
19491 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 19492 | { |
d521ce57 TT |
19493 | const gdb_byte *line_ptr, *extended_end; |
19494 | const gdb_byte *line_end; | |
a8c50c1f | 19495 | unsigned int bytes_read, extended_len; |
699ca60a | 19496 | unsigned char op_code, extended_op; |
e142c38c DJ |
19497 | CORE_ADDR baseaddr; |
19498 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 19499 | bfd *abfd = objfile->obfd; |
fbf65064 | 19500 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
19501 | /* True if we're recording line info (as opposed to building partial |
19502 | symtabs and just interested in finding include files mentioned by | |
19503 | the line number program). */ | |
19504 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
19505 | |
19506 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19507 | |
debd256d JB |
19508 | line_ptr = lh->statement_program_start; |
19509 | line_end = lh->statement_program_end; | |
c906108c SS |
19510 | |
19511 | /* Read the statement sequences until there's nothing left. */ | |
19512 | while (line_ptr < line_end) | |
19513 | { | |
6f77053d PA |
19514 | /* The DWARF line number program state machine. Reset the state |
19515 | machine at the start of each sequence. */ | |
19516 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
19517 | bool end_sequence = false; | |
d9b3de22 | 19518 | |
8c43009f | 19519 | if (record_lines_p) |
c906108c | 19520 | { |
8c43009f PA |
19521 | /* Start a subfile for the current file of the state |
19522 | machine. */ | |
19523 | const file_entry *fe = state_machine.current_file (); | |
19524 | ||
19525 | if (fe != NULL) | |
19526 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
19527 | } |
19528 | ||
a738430d | 19529 | /* Decode the table. */ |
d9b3de22 | 19530 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
19531 | { |
19532 | op_code = read_1_byte (abfd, line_ptr); | |
19533 | line_ptr += 1; | |
9aa1fe7e | 19534 | |
debd256d | 19535 | if (op_code >= lh->opcode_base) |
6e70227d | 19536 | { |
8e07a239 | 19537 | /* Special opcode. */ |
6f77053d | 19538 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
19539 | } |
19540 | else switch (op_code) | |
c906108c SS |
19541 | { |
19542 | case DW_LNS_extended_op: | |
3e43a32a MS |
19543 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
19544 | &bytes_read); | |
473b7be6 | 19545 | line_ptr += bytes_read; |
a8c50c1f | 19546 | extended_end = line_ptr + extended_len; |
c906108c SS |
19547 | extended_op = read_1_byte (abfd, line_ptr); |
19548 | line_ptr += 1; | |
19549 | switch (extended_op) | |
19550 | { | |
19551 | case DW_LNE_end_sequence: | |
6f77053d PA |
19552 | state_machine.handle_end_sequence (); |
19553 | end_sequence = true; | |
c906108c SS |
19554 | break; |
19555 | case DW_LNE_set_address: | |
d9b3de22 DE |
19556 | { |
19557 | CORE_ADDR address | |
19558 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 19559 | line_ptr += bytes_read; |
6f77053d PA |
19560 | |
19561 | state_machine.check_line_address (cu, line_ptr, | |
19562 | lowpc, address); | |
19563 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 19564 | } |
c906108c SS |
19565 | break; |
19566 | case DW_LNE_define_file: | |
debd256d | 19567 | { |
d521ce57 | 19568 | const char *cur_file; |
ecfb656c PA |
19569 | unsigned int mod_time, length; |
19570 | dir_index dindex; | |
6e70227d | 19571 | |
3e43a32a MS |
19572 | cur_file = read_direct_string (abfd, line_ptr, |
19573 | &bytes_read); | |
debd256d | 19574 | line_ptr += bytes_read; |
ecfb656c | 19575 | dindex = (dir_index) |
debd256d JB |
19576 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
19577 | line_ptr += bytes_read; | |
19578 | mod_time = | |
19579 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19580 | line_ptr += bytes_read; | |
19581 | length = | |
19582 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19583 | line_ptr += bytes_read; | |
ecfb656c | 19584 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 19585 | } |
c906108c | 19586 | break; |
d0c6ba3d | 19587 | case DW_LNE_set_discriminator: |
6f77053d PA |
19588 | { |
19589 | /* The discriminator is not interesting to the | |
19590 | debugger; just ignore it. We still need to | |
19591 | check its value though: | |
19592 | if there are consecutive entries for the same | |
19593 | (non-prologue) line we want to coalesce them. | |
19594 | PR 17276. */ | |
19595 | unsigned int discr | |
19596 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19597 | line_ptr += bytes_read; | |
19598 | ||
19599 | state_machine.handle_set_discriminator (discr); | |
19600 | } | |
d0c6ba3d | 19601 | break; |
c906108c | 19602 | default: |
4d3c2250 | 19603 | complaint (&symfile_complaints, |
e2e0b3e5 | 19604 | _("mangled .debug_line section")); |
debd256d | 19605 | return; |
c906108c | 19606 | } |
a8c50c1f DJ |
19607 | /* Make sure that we parsed the extended op correctly. If e.g. |
19608 | we expected a different address size than the producer used, | |
19609 | we may have read the wrong number of bytes. */ | |
19610 | if (line_ptr != extended_end) | |
19611 | { | |
19612 | complaint (&symfile_complaints, | |
19613 | _("mangled .debug_line section")); | |
19614 | return; | |
19615 | } | |
c906108c SS |
19616 | break; |
19617 | case DW_LNS_copy: | |
6f77053d | 19618 | state_machine.handle_copy (); |
c906108c SS |
19619 | break; |
19620 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
19621 | { |
19622 | CORE_ADDR adjust | |
19623 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 19624 | line_ptr += bytes_read; |
6f77053d PA |
19625 | |
19626 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 19627 | } |
c906108c SS |
19628 | break; |
19629 | case DW_LNS_advance_line: | |
a05a36a5 DE |
19630 | { |
19631 | int line_delta | |
19632 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 19633 | line_ptr += bytes_read; |
6f77053d PA |
19634 | |
19635 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 19636 | } |
c906108c SS |
19637 | break; |
19638 | case DW_LNS_set_file: | |
d9b3de22 | 19639 | { |
6f77053d | 19640 | file_name_index file |
ecfb656c PA |
19641 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
19642 | &bytes_read); | |
d9b3de22 | 19643 | line_ptr += bytes_read; |
8c43009f | 19644 | |
6f77053d | 19645 | state_machine.handle_set_file (file); |
d9b3de22 | 19646 | } |
c906108c SS |
19647 | break; |
19648 | case DW_LNS_set_column: | |
0ad93d4f | 19649 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
19650 | line_ptr += bytes_read; |
19651 | break; | |
19652 | case DW_LNS_negate_stmt: | |
6f77053d | 19653 | state_machine.handle_negate_stmt (); |
c906108c SS |
19654 | break; |
19655 | case DW_LNS_set_basic_block: | |
c906108c | 19656 | break; |
c2c6d25f JM |
19657 | /* Add to the address register of the state machine the |
19658 | address increment value corresponding to special opcode | |
a738430d MK |
19659 | 255. I.e., this value is scaled by the minimum |
19660 | instruction length since special opcode 255 would have | |
b021a221 | 19661 | scaled the increment. */ |
c906108c | 19662 | case DW_LNS_const_add_pc: |
6f77053d | 19663 | state_machine.handle_const_add_pc (); |
c906108c SS |
19664 | break; |
19665 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 19666 | { |
6f77053d | 19667 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 19668 | line_ptr += 2; |
6f77053d PA |
19669 | |
19670 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 19671 | } |
c906108c | 19672 | break; |
9aa1fe7e | 19673 | default: |
a738430d MK |
19674 | { |
19675 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 19676 | int i; |
a738430d | 19677 | |
debd256d | 19678 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
19679 | { |
19680 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19681 | line_ptr += bytes_read; | |
19682 | } | |
19683 | } | |
c906108c SS |
19684 | } |
19685 | } | |
d9b3de22 DE |
19686 | |
19687 | if (!end_sequence) | |
19688 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
19689 | ||
19690 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
19691 | in which case we still finish recording the last line). */ | |
6f77053d | 19692 | state_machine.record_line (true); |
c906108c | 19693 | } |
f3f5162e DE |
19694 | } |
19695 | ||
19696 | /* Decode the Line Number Program (LNP) for the given line_header | |
19697 | structure and CU. The actual information extracted and the type | |
19698 | of structures created from the LNP depends on the value of PST. | |
19699 | ||
19700 | 1. If PST is NULL, then this procedure uses the data from the program | |
19701 | to create all necessary symbol tables, and their linetables. | |
19702 | ||
19703 | 2. If PST is not NULL, this procedure reads the program to determine | |
19704 | the list of files included by the unit represented by PST, and | |
19705 | builds all the associated partial symbol tables. | |
19706 | ||
19707 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
19708 | It is used for relative paths in the line table. | |
19709 | NOTE: When processing partial symtabs (pst != NULL), | |
19710 | comp_dir == pst->dirname. | |
19711 | ||
19712 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
19713 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
19714 | symtab we don't use it in the name of the psymtabs we create. | |
19715 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
19716 | A good testcase for this is mb-inline.exp. |
19717 | ||
527f3840 JK |
19718 | LOWPC is the lowest address in CU (or 0 if not known). |
19719 | ||
19720 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
19721 | for its PC<->lines mapping information. Otherwise only the filename | |
19722 | table is read in. */ | |
f3f5162e DE |
19723 | |
19724 | static void | |
19725 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 19726 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 19727 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
19728 | { |
19729 | struct objfile *objfile = cu->objfile; | |
19730 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 19731 | |
527f3840 JK |
19732 | if (decode_mapping) |
19733 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
19734 | |
19735 | if (decode_for_pst_p) | |
19736 | { | |
19737 | int file_index; | |
19738 | ||
19739 | /* Now that we're done scanning the Line Header Program, we can | |
19740 | create the psymtab of each included file. */ | |
fff8551c | 19741 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
19742 | if (lh->file_names[file_index].included_p == 1) |
19743 | { | |
d521ce57 | 19744 | const char *include_name = |
c6da4cef DE |
19745 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
19746 | if (include_name != NULL) | |
aaa75496 JB |
19747 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
19748 | } | |
19749 | } | |
cb1df416 DJ |
19750 | else |
19751 | { | |
19752 | /* Make sure a symtab is created for every file, even files | |
19753 | which contain only variables (i.e. no code with associated | |
19754 | line numbers). */ | |
43f3e411 | 19755 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 19756 | int i; |
cb1df416 | 19757 | |
fff8551c | 19758 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 19759 | { |
8c43009f | 19760 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 19761 | |
8c43009f | 19762 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 19763 | |
cb1df416 | 19764 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
19765 | { |
19766 | current_subfile->symtab | |
19767 | = allocate_symtab (cust, current_subfile->name); | |
19768 | } | |
8c43009f | 19769 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
19770 | } |
19771 | } | |
c906108c SS |
19772 | } |
19773 | ||
19774 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
19775 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 19776 | or NULL if not known. |
c906108c SS |
19777 | This routine tries to keep line numbers from identical absolute and |
19778 | relative file names in a common subfile. | |
19779 | ||
19780 | Using the `list' example from the GDB testsuite, which resides in | |
19781 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
19782 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
19783 | ||
c5aa993b | 19784 | DW_AT_name: /srcdir/list0.c |
4d663531 | 19785 | DW_AT_comp_dir: /compdir |
357e46e7 | 19786 | files.files[0].name: list0.h |
c5aa993b | 19787 | files.files[0].dir: /srcdir |
357e46e7 | 19788 | files.files[1].name: list0.c |
c5aa993b | 19789 | files.files[1].dir: /srcdir |
c906108c SS |
19790 | |
19791 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
19792 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
19793 | start_subfile will ensure that this happens provided that we pass the | |
19794 | concatenation of files.files[1].dir and files.files[1].name as the | |
19795 | subfile's name. */ | |
c906108c SS |
19796 | |
19797 | static void | |
4d663531 | 19798 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 19799 | { |
d521ce57 | 19800 | char *copy = NULL; |
4f1520fb | 19801 | |
4d663531 | 19802 | /* In order not to lose the line information directory, |
4f1520fb FR |
19803 | we concatenate it to the filename when it makes sense. |
19804 | Note that the Dwarf3 standard says (speaking of filenames in line | |
19805 | information): ``The directory index is ignored for file names | |
19806 | that represent full path names''. Thus ignoring dirname in the | |
19807 | `else' branch below isn't an issue. */ | |
c906108c | 19808 | |
d5166ae1 | 19809 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
19810 | { |
19811 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
19812 | filename = copy; | |
19813 | } | |
c906108c | 19814 | |
4d663531 | 19815 | start_subfile (filename); |
4f1520fb | 19816 | |
d521ce57 TT |
19817 | if (copy != NULL) |
19818 | xfree (copy); | |
c906108c SS |
19819 | } |
19820 | ||
f4dc4d17 DE |
19821 | /* Start a symtab for DWARF. |
19822 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
19823 | ||
43f3e411 | 19824 | static struct compunit_symtab * |
f4dc4d17 | 19825 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 19826 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 19827 | { |
43f3e411 | 19828 | struct compunit_symtab *cust |
5ffa0793 | 19829 | = start_symtab (cu->objfile, name, comp_dir, low_pc, cu->language); |
43f3e411 | 19830 | |
f4dc4d17 DE |
19831 | record_debugformat ("DWARF 2"); |
19832 | record_producer (cu->producer); | |
19833 | ||
19834 | /* We assume that we're processing GCC output. */ | |
19835 | processing_gcc_compilation = 2; | |
19836 | ||
4d4ec4e5 | 19837 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
19838 | |
19839 | return cust; | |
f4dc4d17 DE |
19840 | } |
19841 | ||
4c2df51b DJ |
19842 | static void |
19843 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 19844 | struct dwarf2_cu *cu) |
4c2df51b | 19845 | { |
e7c27a73 DJ |
19846 | struct objfile *objfile = cu->objfile; |
19847 | struct comp_unit_head *cu_header = &cu->header; | |
19848 | ||
4c2df51b DJ |
19849 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
19850 | code here to turn a symbol with DW_AT_external and a | |
19851 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
19852 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
19853 | with some versions of binutils) where shared libraries could have | |
19854 | relocations against symbols in their debug information - the | |
19855 | minimal symbol would have the right address, but the debug info | |
19856 | would not. It's no longer necessary, because we will explicitly | |
19857 | apply relocations when we read in the debug information now. */ | |
19858 | ||
19859 | /* A DW_AT_location attribute with no contents indicates that a | |
19860 | variable has been optimized away. */ | |
19861 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
19862 | { | |
f1e6e072 | 19863 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
19864 | return; |
19865 | } | |
19866 | ||
19867 | /* Handle one degenerate form of location expression specially, to | |
19868 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
19869 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
19870 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
19871 | |
19872 | if (attr_form_is_block (attr) | |
3019eac3 DE |
19873 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
19874 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
19875 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
19876 | && (DW_BLOCK (attr)->size | |
19877 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 19878 | { |
891d2f0b | 19879 | unsigned int dummy; |
4c2df51b | 19880 | |
3019eac3 DE |
19881 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
19882 | SYMBOL_VALUE_ADDRESS (sym) = | |
19883 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
19884 | else | |
19885 | SYMBOL_VALUE_ADDRESS (sym) = | |
19886 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 19887 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
19888 | fixup_symbol_section (sym, objfile); |
19889 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
19890 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
19891 | return; |
19892 | } | |
19893 | ||
19894 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
19895 | expression evaluator, and use LOC_COMPUTED only when necessary | |
19896 | (i.e. when the value of a register or memory location is | |
19897 | referenced, or a thread-local block, etc.). Then again, it might | |
19898 | not be worthwhile. I'm assuming that it isn't unless performance | |
19899 | or memory numbers show me otherwise. */ | |
19900 | ||
f1e6e072 | 19901 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19902 | |
f1e6e072 | 19903 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19904 | cu->has_loclist = 1; |
4c2df51b DJ |
19905 | } |
19906 | ||
c906108c SS |
19907 | /* Given a pointer to a DWARF information entry, figure out if we need |
19908 | to make a symbol table entry for it, and if so, create a new entry | |
19909 | and return a pointer to it. | |
19910 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19911 | used the passed type. |
19912 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19913 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19914 | |
19915 | static struct symbol * | |
34eaf542 TT |
19916 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19917 | struct symbol *space) | |
c906108c | 19918 | { |
e7c27a73 | 19919 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19920 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19921 | struct symbol *sym = NULL; |
15d034d0 | 19922 | const char *name; |
c906108c SS |
19923 | struct attribute *attr = NULL; |
19924 | struct attribute *attr2 = NULL; | |
e142c38c | 19925 | CORE_ADDR baseaddr; |
e37fd15a SW |
19926 | struct pending **list_to_add = NULL; |
19927 | ||
edb3359d | 19928 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19929 | |
19930 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19931 | |
94af9270 | 19932 | name = dwarf2_name (die, cu); |
c906108c SS |
19933 | if (name) |
19934 | { | |
94af9270 | 19935 | const char *linkagename; |
34eaf542 | 19936 | int suppress_add = 0; |
94af9270 | 19937 | |
34eaf542 TT |
19938 | if (space) |
19939 | sym = space; | |
19940 | else | |
e623cf5d | 19941 | sym = allocate_symbol (objfile); |
c906108c | 19942 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19943 | |
19944 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19945 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19946 | linkagename = dwarf2_physname (name, die, cu); |
19947 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19948 | |
f55ee35c JK |
19949 | /* Fortran does not have mangling standard and the mangling does differ |
19950 | between gfortran, iFort etc. */ | |
19951 | if (cu->language == language_fortran | |
b250c185 | 19952 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19953 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19954 | dwarf2_full_name (name, die, cu), |
29df156d | 19955 | NULL); |
f55ee35c | 19956 | |
c906108c | 19957 | /* Default assumptions. |
c5aa993b | 19958 | Use the passed type or decode it from the die. */ |
176620f1 | 19959 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19960 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19961 | if (type != NULL) |
19962 | SYMBOL_TYPE (sym) = type; | |
19963 | else | |
e7c27a73 | 19964 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19965 | attr = dwarf2_attr (die, |
19966 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19967 | cu); | |
c906108c SS |
19968 | if (attr) |
19969 | { | |
19970 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19971 | } | |
cb1df416 | 19972 | |
edb3359d DJ |
19973 | attr = dwarf2_attr (die, |
19974 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19975 | cu); | |
cb1df416 DJ |
19976 | if (attr) |
19977 | { | |
ecfb656c | 19978 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 19979 | struct file_entry *fe; |
9a619af0 | 19980 | |
ecfb656c PA |
19981 | if (cu->line_header != NULL) |
19982 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
19983 | else |
19984 | fe = NULL; | |
19985 | ||
19986 | if (fe == NULL) | |
cb1df416 DJ |
19987 | complaint (&symfile_complaints, |
19988 | _("file index out of range")); | |
8c43009f PA |
19989 | else |
19990 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
19991 | } |
19992 | ||
c906108c SS |
19993 | switch (die->tag) |
19994 | { | |
19995 | case DW_TAG_label: | |
e142c38c | 19996 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 19997 | if (attr) |
3e29f34a MR |
19998 | { |
19999 | CORE_ADDR addr; | |
20000 | ||
20001 | addr = attr_value_as_address (attr); | |
20002 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
20003 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
20004 | } | |
0f5238ed TT |
20005 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
20006 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 20007 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 20008 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
20009 | break; |
20010 | case DW_TAG_subprogram: | |
20011 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20012 | finish_block. */ | |
f1e6e072 | 20013 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 20014 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
20015 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
20016 | || cu->language == language_ada) | |
c906108c | 20017 | { |
2cfa0c8d JB |
20018 | /* Subprograms marked external are stored as a global symbol. |
20019 | Ada subprograms, whether marked external or not, are always | |
20020 | stored as a global symbol, because we want to be able to | |
20021 | access them globally. For instance, we want to be able | |
20022 | to break on a nested subprogram without having to | |
20023 | specify the context. */ | |
e37fd15a | 20024 | list_to_add = &global_symbols; |
c906108c SS |
20025 | } |
20026 | else | |
20027 | { | |
e37fd15a | 20028 | list_to_add = cu->list_in_scope; |
c906108c SS |
20029 | } |
20030 | break; | |
edb3359d DJ |
20031 | case DW_TAG_inlined_subroutine: |
20032 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20033 | finish_block. */ | |
f1e6e072 | 20034 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 20035 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 20036 | list_to_add = cu->list_in_scope; |
edb3359d | 20037 | break; |
34eaf542 TT |
20038 | case DW_TAG_template_value_param: |
20039 | suppress_add = 1; | |
20040 | /* Fall through. */ | |
72929c62 | 20041 | case DW_TAG_constant: |
c906108c | 20042 | case DW_TAG_variable: |
254e6b9e | 20043 | case DW_TAG_member: |
0963b4bd MS |
20044 | /* Compilation with minimal debug info may result in |
20045 | variables with missing type entries. Change the | |
20046 | misleading `void' type to something sensible. */ | |
c906108c | 20047 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 20048 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 20049 | |
e142c38c | 20050 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
20051 | /* In the case of DW_TAG_member, we should only be called for |
20052 | static const members. */ | |
20053 | if (die->tag == DW_TAG_member) | |
20054 | { | |
3863f96c DE |
20055 | /* dwarf2_add_field uses die_is_declaration, |
20056 | so we do the same. */ | |
254e6b9e DE |
20057 | gdb_assert (die_is_declaration (die, cu)); |
20058 | gdb_assert (attr); | |
20059 | } | |
c906108c SS |
20060 | if (attr) |
20061 | { | |
e7c27a73 | 20062 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 20063 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 20064 | if (!suppress_add) |
34eaf542 TT |
20065 | { |
20066 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 20067 | list_to_add = &global_symbols; |
34eaf542 | 20068 | else |
e37fd15a | 20069 | list_to_add = cu->list_in_scope; |
34eaf542 | 20070 | } |
c906108c SS |
20071 | break; |
20072 | } | |
e142c38c | 20073 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
20074 | if (attr) |
20075 | { | |
e7c27a73 | 20076 | var_decode_location (attr, sym, cu); |
e142c38c | 20077 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
20078 | |
20079 | /* Fortran explicitly imports any global symbols to the local | |
20080 | scope by DW_TAG_common_block. */ | |
20081 | if (cu->language == language_fortran && die->parent | |
20082 | && die->parent->tag == DW_TAG_common_block) | |
20083 | attr2 = NULL; | |
20084 | ||
caac4577 JG |
20085 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20086 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
20087 | && !dwarf2_per_objfile->has_section_at_zero) | |
20088 | { | |
20089 | /* When a static variable is eliminated by the linker, | |
20090 | the corresponding debug information is not stripped | |
20091 | out, but the variable address is set to null; | |
20092 | do not add such variables into symbol table. */ | |
20093 | } | |
20094 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 20095 | { |
f55ee35c JK |
20096 | /* Workaround gfortran PR debug/40040 - it uses |
20097 | DW_AT_location for variables in -fPIC libraries which may | |
20098 | get overriden by other libraries/executable and get | |
20099 | a different address. Resolve it by the minimal symbol | |
20100 | which may come from inferior's executable using copy | |
20101 | relocation. Make this workaround only for gfortran as for | |
20102 | other compilers GDB cannot guess the minimal symbol | |
20103 | Fortran mangling kind. */ | |
20104 | if (cu->language == language_fortran && die->parent | |
20105 | && die->parent->tag == DW_TAG_module | |
20106 | && cu->producer | |
28586665 | 20107 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 20108 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 20109 | |
1c809c68 TT |
20110 | /* A variable with DW_AT_external is never static, |
20111 | but it may be block-scoped. */ | |
20112 | list_to_add = (cu->list_in_scope == &file_symbols | |
20113 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 20114 | } |
c906108c | 20115 | else |
e37fd15a | 20116 | list_to_add = cu->list_in_scope; |
c906108c SS |
20117 | } |
20118 | else | |
20119 | { | |
20120 | /* We do not know the address of this symbol. | |
c5aa993b JM |
20121 | If it is an external symbol and we have type information |
20122 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
20123 | The address of the variable will then be determined from | |
20124 | the minimal symbol table whenever the variable is | |
20125 | referenced. */ | |
e142c38c | 20126 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
20127 | |
20128 | /* Fortran explicitly imports any global symbols to the local | |
20129 | scope by DW_TAG_common_block. */ | |
20130 | if (cu->language == language_fortran && die->parent | |
20131 | && die->parent->tag == DW_TAG_common_block) | |
20132 | { | |
20133 | /* SYMBOL_CLASS doesn't matter here because | |
20134 | read_common_block is going to reset it. */ | |
20135 | if (!suppress_add) | |
20136 | list_to_add = cu->list_in_scope; | |
20137 | } | |
20138 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
20139 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 20140 | { |
0fe7935b DJ |
20141 | /* A variable with DW_AT_external is never static, but it |
20142 | may be block-scoped. */ | |
20143 | list_to_add = (cu->list_in_scope == &file_symbols | |
20144 | ? &global_symbols : cu->list_in_scope); | |
20145 | ||
f1e6e072 | 20146 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 20147 | } |
442ddf59 JK |
20148 | else if (!die_is_declaration (die, cu)) |
20149 | { | |
20150 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
20151 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
20152 | if (!suppress_add) |
20153 | list_to_add = cu->list_in_scope; | |
442ddf59 | 20154 | } |
c906108c SS |
20155 | } |
20156 | break; | |
20157 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
20158 | /* If we are inside a function, mark this as an argument. If |
20159 | not, we might be looking at an argument to an inlined function | |
20160 | when we do not have enough information to show inlined frames; | |
20161 | pretend it's a local variable in that case so that the user can | |
20162 | still see it. */ | |
20163 | if (context_stack_depth > 0 | |
20164 | && context_stack[context_stack_depth - 1].name != NULL) | |
20165 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 20166 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
20167 | if (attr) |
20168 | { | |
e7c27a73 | 20169 | var_decode_location (attr, sym, cu); |
c906108c | 20170 | } |
e142c38c | 20171 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
20172 | if (attr) |
20173 | { | |
e7c27a73 | 20174 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20175 | } |
f346a30d | 20176 | |
e37fd15a | 20177 | list_to_add = cu->list_in_scope; |
c906108c SS |
20178 | break; |
20179 | case DW_TAG_unspecified_parameters: | |
20180 | /* From varargs functions; gdb doesn't seem to have any | |
20181 | interest in this information, so just ignore it for now. | |
20182 | (FIXME?) */ | |
20183 | break; | |
34eaf542 TT |
20184 | case DW_TAG_template_type_param: |
20185 | suppress_add = 1; | |
20186 | /* Fall through. */ | |
c906108c | 20187 | case DW_TAG_class_type: |
680b30c7 | 20188 | case DW_TAG_interface_type: |
c906108c SS |
20189 | case DW_TAG_structure_type: |
20190 | case DW_TAG_union_type: | |
72019c9c | 20191 | case DW_TAG_set_type: |
c906108c | 20192 | case DW_TAG_enumeration_type: |
f1e6e072 | 20193 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20194 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 20195 | |
63d06c5c | 20196 | { |
9c37b5ae | 20197 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
20198 | really ever be static objects: otherwise, if you try |
20199 | to, say, break of a class's method and you're in a file | |
20200 | which doesn't mention that class, it won't work unless | |
20201 | the check for all static symbols in lookup_symbol_aux | |
20202 | saves you. See the OtherFileClass tests in | |
20203 | gdb.c++/namespace.exp. */ | |
20204 | ||
e37fd15a | 20205 | if (!suppress_add) |
34eaf542 | 20206 | { |
34eaf542 | 20207 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 20208 | && cu->language == language_cplus |
34eaf542 | 20209 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 20210 | |
64382290 | 20211 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 20212 | ... }" also defines a typedef for "foo". */ |
64382290 | 20213 | if (cu->language == language_cplus |
45280282 | 20214 | || cu->language == language_ada |
c44af4eb TT |
20215 | || cu->language == language_d |
20216 | || cu->language == language_rust) | |
64382290 TT |
20217 | { |
20218 | /* The symbol's name is already allocated along | |
20219 | with this objfile, so we don't need to | |
20220 | duplicate it for the type. */ | |
20221 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
20222 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
20223 | } | |
63d06c5c DC |
20224 | } |
20225 | } | |
c906108c SS |
20226 | break; |
20227 | case DW_TAG_typedef: | |
f1e6e072 | 20228 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 20229 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20230 | list_to_add = cu->list_in_scope; |
63d06c5c | 20231 | break; |
c906108c | 20232 | case DW_TAG_base_type: |
a02abb62 | 20233 | case DW_TAG_subrange_type: |
f1e6e072 | 20234 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20235 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20236 | list_to_add = cu->list_in_scope; |
c906108c SS |
20237 | break; |
20238 | case DW_TAG_enumerator: | |
e142c38c | 20239 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
20240 | if (attr) |
20241 | { | |
e7c27a73 | 20242 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20243 | } |
63d06c5c DC |
20244 | { |
20245 | /* NOTE: carlton/2003-11-10: See comment above in the | |
20246 | DW_TAG_class_type, etc. block. */ | |
20247 | ||
e142c38c | 20248 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 20249 | && cu->language == language_cplus |
e142c38c | 20250 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 20251 | } |
c906108c | 20252 | break; |
74921315 | 20253 | case DW_TAG_imported_declaration: |
5c4e30ca | 20254 | case DW_TAG_namespace: |
f1e6e072 | 20255 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 20256 | list_to_add = &global_symbols; |
5c4e30ca | 20257 | break; |
530e8392 KB |
20258 | case DW_TAG_module: |
20259 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
20260 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
20261 | list_to_add = &global_symbols; | |
20262 | break; | |
4357ac6c | 20263 | case DW_TAG_common_block: |
f1e6e072 | 20264 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
20265 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
20266 | add_symbol_to_list (sym, cu->list_in_scope); | |
20267 | break; | |
c906108c SS |
20268 | default: |
20269 | /* Not a tag we recognize. Hopefully we aren't processing | |
20270 | trash data, but since we must specifically ignore things | |
20271 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 20272 | this point. */ |
e2e0b3e5 | 20273 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 20274 | dwarf_tag_name (die->tag)); |
c906108c SS |
20275 | break; |
20276 | } | |
df8a16a1 | 20277 | |
e37fd15a SW |
20278 | if (suppress_add) |
20279 | { | |
20280 | sym->hash_next = objfile->template_symbols; | |
20281 | objfile->template_symbols = sym; | |
20282 | list_to_add = NULL; | |
20283 | } | |
20284 | ||
20285 | if (list_to_add != NULL) | |
20286 | add_symbol_to_list (sym, list_to_add); | |
20287 | ||
df8a16a1 DJ |
20288 | /* For the benefit of old versions of GCC, check for anonymous |
20289 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 20290 | if (!cu->processing_has_namespace_info |
94af9270 | 20291 | && cu->language == language_cplus) |
a10964d1 | 20292 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
20293 | } |
20294 | return (sym); | |
20295 | } | |
20296 | ||
34eaf542 TT |
20297 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
20298 | ||
20299 | static struct symbol * | |
20300 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
20301 | { | |
20302 | return new_symbol_full (die, type, cu, NULL); | |
20303 | } | |
20304 | ||
98bfdba5 PA |
20305 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20306 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20307 | standard (v4) is not entirely clear about the meaning of using | |
20308 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20309 | wider than the data. The conclusion of a discussion on the DWARF | |
20310 | list was that this is unspecified. We choose to always zero-extend | |
20311 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20312 | |
98bfdba5 | 20313 | static gdb_byte * |
ff39bb5e | 20314 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20315 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20316 | { |
e7c27a73 | 20317 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
20318 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20319 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20320 | LONGEST l = DW_UNSND (attr); |
20321 | ||
20322 | if (bits < sizeof (*value) * 8) | |
20323 | { | |
20324 | l &= ((LONGEST) 1 << bits) - 1; | |
20325 | *value = l; | |
20326 | } | |
20327 | else if (bits == sizeof (*value) * 8) | |
20328 | *value = l; | |
20329 | else | |
20330 | { | |
224c3ddb | 20331 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20332 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20333 | return bytes; | |
20334 | } | |
20335 | ||
20336 | return NULL; | |
20337 | } | |
20338 | ||
20339 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20340 | the value does not fit in *VALUE, set *BYTES - either already | |
20341 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20342 | or, set *BATON, if we translated the constant to a location | |
20343 | expression. */ | |
20344 | ||
20345 | static void | |
ff39bb5e | 20346 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20347 | const char *name, struct obstack *obstack, |
20348 | struct dwarf2_cu *cu, | |
d521ce57 | 20349 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20350 | struct dwarf2_locexpr_baton **baton) |
20351 | { | |
20352 | struct objfile *objfile = cu->objfile; | |
20353 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 20354 | struct dwarf_block *blk; |
98bfdba5 PA |
20355 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20356 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20357 | ||
20358 | *value = 0; | |
20359 | *bytes = NULL; | |
20360 | *baton = NULL; | |
c906108c SS |
20361 | |
20362 | switch (attr->form) | |
20363 | { | |
20364 | case DW_FORM_addr: | |
3019eac3 | 20365 | case DW_FORM_GNU_addr_index: |
ac56253d | 20366 | { |
ac56253d TT |
20367 | gdb_byte *data; |
20368 | ||
98bfdba5 PA |
20369 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20370 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20371 | cu_header->addr_size, |
98bfdba5 | 20372 | TYPE_LENGTH (type)); |
ac56253d TT |
20373 | /* Symbols of this form are reasonably rare, so we just |
20374 | piggyback on the existing location code rather than writing | |
20375 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20376 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20377 | (*baton)->per_cu = cu->per_cu; |
20378 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20379 | |
98bfdba5 | 20380 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20381 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20382 | (*baton)->data = data; |
ac56253d TT |
20383 | |
20384 | data[0] = DW_OP_addr; | |
20385 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20386 | byte_order, DW_ADDR (attr)); | |
20387 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20388 | } |
c906108c | 20389 | break; |
4ac36638 | 20390 | case DW_FORM_string: |
93b5768b | 20391 | case DW_FORM_strp: |
3019eac3 | 20392 | case DW_FORM_GNU_str_index: |
36586728 | 20393 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
20394 | /* DW_STRING is already allocated on the objfile obstack, point |
20395 | directly to it. */ | |
d521ce57 | 20396 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 20397 | break; |
c906108c SS |
20398 | case DW_FORM_block1: |
20399 | case DW_FORM_block2: | |
20400 | case DW_FORM_block4: | |
20401 | case DW_FORM_block: | |
2dc7f7b3 | 20402 | case DW_FORM_exprloc: |
0224619f | 20403 | case DW_FORM_data16: |
c906108c | 20404 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
20405 | if (TYPE_LENGTH (type) != blk->size) |
20406 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
20407 | TYPE_LENGTH (type)); | |
20408 | *bytes = blk->data; | |
c906108c | 20409 | break; |
2df3850c JM |
20410 | |
20411 | /* The DW_AT_const_value attributes are supposed to carry the | |
20412 | symbol's value "represented as it would be on the target | |
20413 | architecture." By the time we get here, it's already been | |
20414 | converted to host endianness, so we just need to sign- or | |
20415 | zero-extend it as appropriate. */ | |
20416 | case DW_FORM_data1: | |
3aef2284 | 20417 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 20418 | break; |
c906108c | 20419 | case DW_FORM_data2: |
3aef2284 | 20420 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 20421 | break; |
c906108c | 20422 | case DW_FORM_data4: |
3aef2284 | 20423 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 20424 | break; |
c906108c | 20425 | case DW_FORM_data8: |
3aef2284 | 20426 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
20427 | break; |
20428 | ||
c906108c | 20429 | case DW_FORM_sdata: |
663c44ac | 20430 | case DW_FORM_implicit_const: |
98bfdba5 | 20431 | *value = DW_SND (attr); |
2df3850c JM |
20432 | break; |
20433 | ||
c906108c | 20434 | case DW_FORM_udata: |
98bfdba5 | 20435 | *value = DW_UNSND (attr); |
c906108c | 20436 | break; |
2df3850c | 20437 | |
c906108c | 20438 | default: |
4d3c2250 | 20439 | complaint (&symfile_complaints, |
e2e0b3e5 | 20440 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 20441 | dwarf_form_name (attr->form)); |
98bfdba5 | 20442 | *value = 0; |
c906108c SS |
20443 | break; |
20444 | } | |
20445 | } | |
20446 | ||
2df3850c | 20447 | |
98bfdba5 PA |
20448 | /* Copy constant value from an attribute to a symbol. */ |
20449 | ||
2df3850c | 20450 | static void |
ff39bb5e | 20451 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 20452 | struct dwarf2_cu *cu) |
2df3850c | 20453 | { |
98bfdba5 | 20454 | struct objfile *objfile = cu->objfile; |
12df843f | 20455 | LONGEST value; |
d521ce57 | 20456 | const gdb_byte *bytes; |
98bfdba5 | 20457 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 20458 | |
98bfdba5 PA |
20459 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
20460 | SYMBOL_PRINT_NAME (sym), | |
20461 | &objfile->objfile_obstack, cu, | |
20462 | &value, &bytes, &baton); | |
2df3850c | 20463 | |
98bfdba5 PA |
20464 | if (baton != NULL) |
20465 | { | |
98bfdba5 | 20466 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 20467 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
20468 | } |
20469 | else if (bytes != NULL) | |
20470 | { | |
20471 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 20472 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
20473 | } |
20474 | else | |
20475 | { | |
20476 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 20477 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 20478 | } |
2df3850c JM |
20479 | } |
20480 | ||
c906108c SS |
20481 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
20482 | ||
20483 | static struct type * | |
e7c27a73 | 20484 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20485 | { |
c906108c | 20486 | struct attribute *type_attr; |
c906108c | 20487 | |
e142c38c | 20488 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
20489 | if (!type_attr) |
20490 | { | |
20491 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 20492 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 20493 | } |
348e048f | 20494 | |
673bfd45 | 20495 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20496 | } |
20497 | ||
b4ba55a1 JB |
20498 | /* True iff CU's producer generates GNAT Ada auxiliary information |
20499 | that allows to find parallel types through that information instead | |
20500 | of having to do expensive parallel lookups by type name. */ | |
20501 | ||
20502 | static int | |
20503 | need_gnat_info (struct dwarf2_cu *cu) | |
20504 | { | |
20505 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
20506 | of GNAT produces this auxiliary information, without any indication | |
20507 | that it is produced. Part of enhancing the FSF version of GNAT | |
20508 | to produce that information will be to put in place an indicator | |
20509 | that we can use in order to determine whether the descriptive type | |
20510 | info is available or not. One suggestion that has been made is | |
20511 | to use a new attribute, attached to the CU die. For now, assume | |
20512 | that the descriptive type info is not available. */ | |
20513 | return 0; | |
20514 | } | |
20515 | ||
b4ba55a1 JB |
20516 | /* Return the auxiliary type of the die in question using its |
20517 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
20518 | attribute is not present. */ | |
20519 | ||
20520 | static struct type * | |
20521 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
20522 | { | |
b4ba55a1 | 20523 | struct attribute *type_attr; |
b4ba55a1 JB |
20524 | |
20525 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
20526 | if (!type_attr) | |
20527 | return NULL; | |
20528 | ||
673bfd45 | 20529 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
20530 | } |
20531 | ||
20532 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
20533 | descriptive type accordingly. */ | |
20534 | ||
20535 | static void | |
20536 | set_descriptive_type (struct type *type, struct die_info *die, | |
20537 | struct dwarf2_cu *cu) | |
20538 | { | |
20539 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
20540 | ||
20541 | if (descriptive_type) | |
20542 | { | |
20543 | ALLOCATE_GNAT_AUX_TYPE (type); | |
20544 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
20545 | } | |
20546 | } | |
20547 | ||
c906108c SS |
20548 | /* Return the containing type of the die in question using its |
20549 | DW_AT_containing_type attribute. */ | |
20550 | ||
20551 | static struct type * | |
e7c27a73 | 20552 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20553 | { |
c906108c | 20554 | struct attribute *type_attr; |
c906108c | 20555 | |
e142c38c | 20556 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
20557 | if (!type_attr) |
20558 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 20559 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 20560 | |
673bfd45 | 20561 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20562 | } |
20563 | ||
ac9ec31b DE |
20564 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
20565 | ||
20566 | static struct type * | |
20567 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
20568 | { | |
20569 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
20570 | char *message, *saved; | |
20571 | ||
20572 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 20573 | objfile_name (objfile), |
9c541725 PA |
20574 | to_underlying (cu->header.sect_off), |
20575 | to_underlying (die->sect_off)); | |
224c3ddb SM |
20576 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
20577 | message, strlen (message)); | |
ac9ec31b DE |
20578 | xfree (message); |
20579 | ||
19f392bc | 20580 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
20581 | } |
20582 | ||
673bfd45 | 20583 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
20584 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
20585 | DW_AT_containing_type. | |
673bfd45 DE |
20586 | If there is no type substitute an error marker. */ |
20587 | ||
c906108c | 20588 | static struct type * |
ff39bb5e | 20589 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 20590 | struct dwarf2_cu *cu) |
c906108c | 20591 | { |
bb5ed363 | 20592 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
20593 | struct type *this_type; |
20594 | ||
ac9ec31b DE |
20595 | gdb_assert (attr->name == DW_AT_type |
20596 | || attr->name == DW_AT_GNAT_descriptive_type | |
20597 | || attr->name == DW_AT_containing_type); | |
20598 | ||
673bfd45 DE |
20599 | /* First see if we have it cached. */ |
20600 | ||
36586728 TT |
20601 | if (attr->form == DW_FORM_GNU_ref_alt) |
20602 | { | |
20603 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 20604 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 20605 | |
9c541725 PA |
20606 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
20607 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 20608 | } |
7771576e | 20609 | else if (attr_form_is_ref (attr)) |
673bfd45 | 20610 | { |
9c541725 | 20611 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 20612 | |
9c541725 | 20613 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 20614 | } |
55f1336d | 20615 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 20616 | { |
ac9ec31b | 20617 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 20618 | |
ac9ec31b | 20619 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
20620 | } |
20621 | else | |
20622 | { | |
ac9ec31b DE |
20623 | complaint (&symfile_complaints, |
20624 | _("Dwarf Error: Bad type attribute %s in DIE" | |
20625 | " at 0x%x [in module %s]"), | |
9c541725 | 20626 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 20627 | objfile_name (objfile)); |
ac9ec31b | 20628 | return build_error_marker_type (cu, die); |
673bfd45 DE |
20629 | } |
20630 | ||
20631 | /* If not cached we need to read it in. */ | |
20632 | ||
20633 | if (this_type == NULL) | |
20634 | { | |
ac9ec31b | 20635 | struct die_info *type_die = NULL; |
673bfd45 DE |
20636 | struct dwarf2_cu *type_cu = cu; |
20637 | ||
7771576e | 20638 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20639 | type_die = follow_die_ref (die, attr, &type_cu); |
20640 | if (type_die == NULL) | |
20641 | return build_error_marker_type (cu, die); | |
20642 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
20643 | from an inter-CU reference and the type's CU got expanded before |
20644 | ours. */ | |
ac9ec31b | 20645 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
20646 | } |
20647 | ||
20648 | /* If we still don't have a type use an error marker. */ | |
20649 | ||
20650 | if (this_type == NULL) | |
ac9ec31b | 20651 | return build_error_marker_type (cu, die); |
673bfd45 | 20652 | |
f792889a | 20653 | return this_type; |
c906108c SS |
20654 | } |
20655 | ||
673bfd45 DE |
20656 | /* Return the type in DIE, CU. |
20657 | Returns NULL for invalid types. | |
20658 | ||
02142a6c | 20659 | This first does a lookup in die_type_hash, |
673bfd45 DE |
20660 | and only reads the die in if necessary. |
20661 | ||
20662 | NOTE: This can be called when reading in partial or full symbols. */ | |
20663 | ||
f792889a | 20664 | static struct type * |
e7c27a73 | 20665 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20666 | { |
f792889a DJ |
20667 | struct type *this_type; |
20668 | ||
20669 | this_type = get_die_type (die, cu); | |
20670 | if (this_type) | |
20671 | return this_type; | |
20672 | ||
673bfd45 DE |
20673 | return read_type_die_1 (die, cu); |
20674 | } | |
20675 | ||
20676 | /* Read the type in DIE, CU. | |
20677 | Returns NULL for invalid types. */ | |
20678 | ||
20679 | static struct type * | |
20680 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
20681 | { | |
20682 | struct type *this_type = NULL; | |
20683 | ||
c906108c SS |
20684 | switch (die->tag) |
20685 | { | |
20686 | case DW_TAG_class_type: | |
680b30c7 | 20687 | case DW_TAG_interface_type: |
c906108c SS |
20688 | case DW_TAG_structure_type: |
20689 | case DW_TAG_union_type: | |
f792889a | 20690 | this_type = read_structure_type (die, cu); |
c906108c SS |
20691 | break; |
20692 | case DW_TAG_enumeration_type: | |
f792889a | 20693 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
20694 | break; |
20695 | case DW_TAG_subprogram: | |
20696 | case DW_TAG_subroutine_type: | |
edb3359d | 20697 | case DW_TAG_inlined_subroutine: |
f792889a | 20698 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
20699 | break; |
20700 | case DW_TAG_array_type: | |
f792889a | 20701 | this_type = read_array_type (die, cu); |
c906108c | 20702 | break; |
72019c9c | 20703 | case DW_TAG_set_type: |
f792889a | 20704 | this_type = read_set_type (die, cu); |
72019c9c | 20705 | break; |
c906108c | 20706 | case DW_TAG_pointer_type: |
f792889a | 20707 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
20708 | break; |
20709 | case DW_TAG_ptr_to_member_type: | |
f792889a | 20710 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
20711 | break; |
20712 | case DW_TAG_reference_type: | |
4297a3f0 AV |
20713 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
20714 | break; | |
20715 | case DW_TAG_rvalue_reference_type: | |
20716 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
20717 | break; |
20718 | case DW_TAG_const_type: | |
f792889a | 20719 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
20720 | break; |
20721 | case DW_TAG_volatile_type: | |
f792889a | 20722 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 20723 | break; |
06d66ee9 TT |
20724 | case DW_TAG_restrict_type: |
20725 | this_type = read_tag_restrict_type (die, cu); | |
20726 | break; | |
c906108c | 20727 | case DW_TAG_string_type: |
f792889a | 20728 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
20729 | break; |
20730 | case DW_TAG_typedef: | |
f792889a | 20731 | this_type = read_typedef (die, cu); |
c906108c | 20732 | break; |
a02abb62 | 20733 | case DW_TAG_subrange_type: |
f792889a | 20734 | this_type = read_subrange_type (die, cu); |
a02abb62 | 20735 | break; |
c906108c | 20736 | case DW_TAG_base_type: |
f792889a | 20737 | this_type = read_base_type (die, cu); |
c906108c | 20738 | break; |
81a17f79 | 20739 | case DW_TAG_unspecified_type: |
f792889a | 20740 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 20741 | break; |
0114d602 DJ |
20742 | case DW_TAG_namespace: |
20743 | this_type = read_namespace_type (die, cu); | |
20744 | break; | |
f55ee35c JK |
20745 | case DW_TAG_module: |
20746 | this_type = read_module_type (die, cu); | |
20747 | break; | |
a2c2acaf MW |
20748 | case DW_TAG_atomic_type: |
20749 | this_type = read_tag_atomic_type (die, cu); | |
20750 | break; | |
c906108c | 20751 | default: |
3e43a32a MS |
20752 | complaint (&symfile_complaints, |
20753 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 20754 | dwarf_tag_name (die->tag)); |
c906108c SS |
20755 | break; |
20756 | } | |
63d06c5c | 20757 | |
f792889a | 20758 | return this_type; |
63d06c5c DC |
20759 | } |
20760 | ||
abc72ce4 DE |
20761 | /* See if we can figure out if the class lives in a namespace. We do |
20762 | this by looking for a member function; its demangled name will | |
20763 | contain namespace info, if there is any. | |
20764 | Return the computed name or NULL. | |
20765 | Space for the result is allocated on the objfile's obstack. | |
20766 | This is the full-die version of guess_partial_die_structure_name. | |
20767 | In this case we know DIE has no useful parent. */ | |
20768 | ||
20769 | static char * | |
20770 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
20771 | { | |
20772 | struct die_info *spec_die; | |
20773 | struct dwarf2_cu *spec_cu; | |
20774 | struct die_info *child; | |
20775 | ||
20776 | spec_cu = cu; | |
20777 | spec_die = die_specification (die, &spec_cu); | |
20778 | if (spec_die != NULL) | |
20779 | { | |
20780 | die = spec_die; | |
20781 | cu = spec_cu; | |
20782 | } | |
20783 | ||
20784 | for (child = die->child; | |
20785 | child != NULL; | |
20786 | child = child->sibling) | |
20787 | { | |
20788 | if (child->tag == DW_TAG_subprogram) | |
20789 | { | |
73b9be8b | 20790 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 20791 | |
7d45c7c3 | 20792 | if (linkage_name != NULL) |
abc72ce4 DE |
20793 | { |
20794 | char *actual_name | |
20795 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 20796 | linkage_name); |
abc72ce4 DE |
20797 | char *name = NULL; |
20798 | ||
20799 | if (actual_name != NULL) | |
20800 | { | |
15d034d0 | 20801 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
20802 | |
20803 | if (die_name != NULL | |
20804 | && strcmp (die_name, actual_name) != 0) | |
20805 | { | |
20806 | /* Strip off the class name from the full name. | |
20807 | We want the prefix. */ | |
20808 | int die_name_len = strlen (die_name); | |
20809 | int actual_name_len = strlen (actual_name); | |
20810 | ||
20811 | /* Test for '::' as a sanity check. */ | |
20812 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
20813 | && actual_name[actual_name_len |
20814 | - die_name_len - 1] == ':') | |
224c3ddb SM |
20815 | name = (char *) obstack_copy0 ( |
20816 | &cu->objfile->per_bfd->storage_obstack, | |
20817 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
20818 | } |
20819 | } | |
20820 | xfree (actual_name); | |
20821 | return name; | |
20822 | } | |
20823 | } | |
20824 | } | |
20825 | ||
20826 | return NULL; | |
20827 | } | |
20828 | ||
96408a79 SA |
20829 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
20830 | prefix part in such case. See | |
20831 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20832 | ||
a121b7c1 | 20833 | static const char * |
96408a79 SA |
20834 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
20835 | { | |
20836 | struct attribute *attr; | |
e6a959d6 | 20837 | const char *base; |
96408a79 SA |
20838 | |
20839 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
20840 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
20841 | return NULL; | |
20842 | ||
7d45c7c3 | 20843 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
20844 | return NULL; |
20845 | ||
73b9be8b | 20846 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
20847 | if (attr == NULL || DW_STRING (attr) == NULL) |
20848 | return NULL; | |
20849 | ||
20850 | /* dwarf2_name had to be already called. */ | |
20851 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
20852 | ||
20853 | /* Strip the base name, keep any leading namespaces/classes. */ | |
20854 | base = strrchr (DW_STRING (attr), ':'); | |
20855 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
20856 | return ""; | |
20857 | ||
224c3ddb SM |
20858 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
20859 | DW_STRING (attr), | |
20860 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
20861 | } |
20862 | ||
fdde2d81 | 20863 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 20864 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 20865 | |
0114d602 DJ |
20866 | For example, if we're within the method foo() in the following |
20867 | code: | |
20868 | ||
20869 | namespace N { | |
20870 | class C { | |
20871 | void foo () { | |
20872 | } | |
20873 | }; | |
20874 | } | |
20875 | ||
20876 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 20877 | |
0d5cff50 | 20878 | static const char * |
e142c38c | 20879 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 20880 | { |
0114d602 DJ |
20881 | struct die_info *parent, *spec_die; |
20882 | struct dwarf2_cu *spec_cu; | |
20883 | struct type *parent_type; | |
a121b7c1 | 20884 | const char *retval; |
63d06c5c | 20885 | |
9c37b5ae | 20886 | if (cu->language != language_cplus |
c44af4eb TT |
20887 | && cu->language != language_fortran && cu->language != language_d |
20888 | && cu->language != language_rust) | |
0114d602 DJ |
20889 | return ""; |
20890 | ||
96408a79 SA |
20891 | retval = anonymous_struct_prefix (die, cu); |
20892 | if (retval) | |
20893 | return retval; | |
20894 | ||
0114d602 DJ |
20895 | /* We have to be careful in the presence of DW_AT_specification. |
20896 | For example, with GCC 3.4, given the code | |
20897 | ||
20898 | namespace N { | |
20899 | void foo() { | |
20900 | // Definition of N::foo. | |
20901 | } | |
20902 | } | |
20903 | ||
20904 | then we'll have a tree of DIEs like this: | |
20905 | ||
20906 | 1: DW_TAG_compile_unit | |
20907 | 2: DW_TAG_namespace // N | |
20908 | 3: DW_TAG_subprogram // declaration of N::foo | |
20909 | 4: DW_TAG_subprogram // definition of N::foo | |
20910 | DW_AT_specification // refers to die #3 | |
20911 | ||
20912 | Thus, when processing die #4, we have to pretend that we're in | |
20913 | the context of its DW_AT_specification, namely the contex of die | |
20914 | #3. */ | |
20915 | spec_cu = cu; | |
20916 | spec_die = die_specification (die, &spec_cu); | |
20917 | if (spec_die == NULL) | |
20918 | parent = die->parent; | |
20919 | else | |
63d06c5c | 20920 | { |
0114d602 DJ |
20921 | parent = spec_die->parent; |
20922 | cu = spec_cu; | |
63d06c5c | 20923 | } |
0114d602 DJ |
20924 | |
20925 | if (parent == NULL) | |
20926 | return ""; | |
98bfdba5 PA |
20927 | else if (parent->building_fullname) |
20928 | { | |
20929 | const char *name; | |
20930 | const char *parent_name; | |
20931 | ||
20932 | /* It has been seen on RealView 2.2 built binaries, | |
20933 | DW_TAG_template_type_param types actually _defined_ as | |
20934 | children of the parent class: | |
20935 | ||
20936 | enum E {}; | |
20937 | template class <class Enum> Class{}; | |
20938 | Class<enum E> class_e; | |
20939 | ||
20940 | 1: DW_TAG_class_type (Class) | |
20941 | 2: DW_TAG_enumeration_type (E) | |
20942 | 3: DW_TAG_enumerator (enum1:0) | |
20943 | 3: DW_TAG_enumerator (enum2:1) | |
20944 | ... | |
20945 | 2: DW_TAG_template_type_param | |
20946 | DW_AT_type DW_FORM_ref_udata (E) | |
20947 | ||
20948 | Besides being broken debug info, it can put GDB into an | |
20949 | infinite loop. Consider: | |
20950 | ||
20951 | When we're building the full name for Class<E>, we'll start | |
20952 | at Class, and go look over its template type parameters, | |
20953 | finding E. We'll then try to build the full name of E, and | |
20954 | reach here. We're now trying to build the full name of E, | |
20955 | and look over the parent DIE for containing scope. In the | |
20956 | broken case, if we followed the parent DIE of E, we'd again | |
20957 | find Class, and once again go look at its template type | |
20958 | arguments, etc., etc. Simply don't consider such parent die | |
20959 | as source-level parent of this die (it can't be, the language | |
20960 | doesn't allow it), and break the loop here. */ | |
20961 | name = dwarf2_name (die, cu); | |
20962 | parent_name = dwarf2_name (parent, cu); | |
20963 | complaint (&symfile_complaints, | |
20964 | _("template param type '%s' defined within parent '%s'"), | |
20965 | name ? name : "<unknown>", | |
20966 | parent_name ? parent_name : "<unknown>"); | |
20967 | return ""; | |
20968 | } | |
63d06c5c | 20969 | else |
0114d602 DJ |
20970 | switch (parent->tag) |
20971 | { | |
63d06c5c | 20972 | case DW_TAG_namespace: |
0114d602 | 20973 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20974 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20975 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20976 | Work around this problem here. */ | |
20977 | if (cu->language == language_cplus | |
20978 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
20979 | return ""; | |
0114d602 DJ |
20980 | /* We give a name to even anonymous namespaces. */ |
20981 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 20982 | case DW_TAG_class_type: |
680b30c7 | 20983 | case DW_TAG_interface_type: |
63d06c5c | 20984 | case DW_TAG_structure_type: |
0114d602 | 20985 | case DW_TAG_union_type: |
f55ee35c | 20986 | case DW_TAG_module: |
0114d602 DJ |
20987 | parent_type = read_type_die (parent, cu); |
20988 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20989 | return TYPE_TAG_NAME (parent_type); | |
20990 | else | |
20991 | /* An anonymous structure is only allowed non-static data | |
20992 | members; no typedefs, no member functions, et cetera. | |
20993 | So it does not need a prefix. */ | |
20994 | return ""; | |
abc72ce4 | 20995 | case DW_TAG_compile_unit: |
95554aad | 20996 | case DW_TAG_partial_unit: |
abc72ce4 DE |
20997 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
20998 | if (cu->language == language_cplus | |
8b70b953 | 20999 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
21000 | && die->child != NULL |
21001 | && (die->tag == DW_TAG_class_type | |
21002 | || die->tag == DW_TAG_structure_type | |
21003 | || die->tag == DW_TAG_union_type)) | |
21004 | { | |
21005 | char *name = guess_full_die_structure_name (die, cu); | |
21006 | if (name != NULL) | |
21007 | return name; | |
21008 | } | |
21009 | return ""; | |
3d567982 TT |
21010 | case DW_TAG_enumeration_type: |
21011 | parent_type = read_type_die (parent, cu); | |
21012 | if (TYPE_DECLARED_CLASS (parent_type)) | |
21013 | { | |
21014 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
21015 | return TYPE_TAG_NAME (parent_type); | |
21016 | return ""; | |
21017 | } | |
21018 | /* Fall through. */ | |
63d06c5c | 21019 | default: |
8176b9b8 | 21020 | return determine_prefix (parent, cu); |
63d06c5c | 21021 | } |
63d06c5c DC |
21022 | } |
21023 | ||
3e43a32a MS |
21024 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
21025 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
21026 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
21027 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
21028 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 21029 | |
f55ee35c | 21030 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
21031 | |
21032 | static char * | |
f55ee35c JK |
21033 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
21034 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 21035 | { |
f55ee35c | 21036 | const char *lead = ""; |
5c315b68 | 21037 | const char *sep; |
63d06c5c | 21038 | |
3e43a32a MS |
21039 | if (suffix == NULL || suffix[0] == '\0' |
21040 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 21041 | sep = ""; |
45280282 IB |
21042 | else if (cu->language == language_d) |
21043 | { | |
21044 | /* For D, the 'main' function could be defined in any module, but it | |
21045 | should never be prefixed. */ | |
21046 | if (strcmp (suffix, "D main") == 0) | |
21047 | { | |
21048 | prefix = ""; | |
21049 | sep = ""; | |
21050 | } | |
21051 | else | |
21052 | sep = "."; | |
21053 | } | |
f55ee35c JK |
21054 | else if (cu->language == language_fortran && physname) |
21055 | { | |
21056 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
21057 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
21058 | ||
21059 | lead = "__"; | |
21060 | sep = "_MOD_"; | |
21061 | } | |
987504bb JJ |
21062 | else |
21063 | sep = "::"; | |
63d06c5c | 21064 | |
6dd47d34 DE |
21065 | if (prefix == NULL) |
21066 | prefix = ""; | |
21067 | if (suffix == NULL) | |
21068 | suffix = ""; | |
21069 | ||
987504bb JJ |
21070 | if (obs == NULL) |
21071 | { | |
3e43a32a | 21072 | char *retval |
224c3ddb SM |
21073 | = ((char *) |
21074 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 21075 | |
f55ee35c JK |
21076 | strcpy (retval, lead); |
21077 | strcat (retval, prefix); | |
6dd47d34 DE |
21078 | strcat (retval, sep); |
21079 | strcat (retval, suffix); | |
63d06c5c DC |
21080 | return retval; |
21081 | } | |
987504bb JJ |
21082 | else |
21083 | { | |
21084 | /* We have an obstack. */ | |
f55ee35c | 21085 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 21086 | } |
63d06c5c DC |
21087 | } |
21088 | ||
c906108c SS |
21089 | /* Return sibling of die, NULL if no sibling. */ |
21090 | ||
f9aca02d | 21091 | static struct die_info * |
fba45db2 | 21092 | sibling_die (struct die_info *die) |
c906108c | 21093 | { |
639d11d3 | 21094 | return die->sibling; |
c906108c SS |
21095 | } |
21096 | ||
71c25dea TT |
21097 | /* Get name of a die, return NULL if not found. */ |
21098 | ||
15d034d0 TT |
21099 | static const char * |
21100 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
21101 | struct obstack *obstack) |
21102 | { | |
21103 | if (name && cu->language == language_cplus) | |
21104 | { | |
2f408ecb | 21105 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 21106 | |
2f408ecb | 21107 | if (!canon_name.empty ()) |
71c25dea | 21108 | { |
2f408ecb PA |
21109 | if (canon_name != name) |
21110 | name = (const char *) obstack_copy0 (obstack, | |
21111 | canon_name.c_str (), | |
21112 | canon_name.length ()); | |
71c25dea TT |
21113 | } |
21114 | } | |
21115 | ||
21116 | return name; | |
c906108c SS |
21117 | } |
21118 | ||
96553a0c DE |
21119 | /* Get name of a die, return NULL if not found. |
21120 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 21121 | |
15d034d0 | 21122 | static const char * |
e142c38c | 21123 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
21124 | { |
21125 | struct attribute *attr; | |
21126 | ||
e142c38c | 21127 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 21128 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 21129 | && die->tag != DW_TAG_namespace |
53832f31 TT |
21130 | && die->tag != DW_TAG_class_type |
21131 | && die->tag != DW_TAG_interface_type | |
21132 | && die->tag != DW_TAG_structure_type | |
21133 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
21134 | return NULL; |
21135 | ||
21136 | switch (die->tag) | |
21137 | { | |
21138 | case DW_TAG_compile_unit: | |
95554aad | 21139 | case DW_TAG_partial_unit: |
71c25dea TT |
21140 | /* Compilation units have a DW_AT_name that is a filename, not |
21141 | a source language identifier. */ | |
21142 | case DW_TAG_enumeration_type: | |
21143 | case DW_TAG_enumerator: | |
21144 | /* These tags always have simple identifiers already; no need | |
21145 | to canonicalize them. */ | |
21146 | return DW_STRING (attr); | |
907af001 | 21147 | |
96553a0c DE |
21148 | case DW_TAG_namespace: |
21149 | if (attr != NULL && DW_STRING (attr) != NULL) | |
21150 | return DW_STRING (attr); | |
21151 | return CP_ANONYMOUS_NAMESPACE_STR; | |
21152 | ||
907af001 UW |
21153 | case DW_TAG_class_type: |
21154 | case DW_TAG_interface_type: | |
21155 | case DW_TAG_structure_type: | |
21156 | case DW_TAG_union_type: | |
21157 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
21158 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
21159 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
21160 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 21161 | if (attr && DW_STRING (attr) |
61012eef GB |
21162 | && (startswith (DW_STRING (attr), "._") |
21163 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 21164 | return NULL; |
53832f31 TT |
21165 | |
21166 | /* GCC might emit a nameless typedef that has a linkage name. See | |
21167 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21168 | if (!attr || DW_STRING (attr) == NULL) | |
21169 | { | |
df5c6c50 | 21170 | char *demangled = NULL; |
53832f31 | 21171 | |
73b9be8b | 21172 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
21173 | if (attr == NULL || DW_STRING (attr) == NULL) |
21174 | return NULL; | |
21175 | ||
df5c6c50 JK |
21176 | /* Avoid demangling DW_STRING (attr) the second time on a second |
21177 | call for the same DIE. */ | |
21178 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 21179 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
21180 | |
21181 | if (demangled) | |
21182 | { | |
e6a959d6 | 21183 | const char *base; |
96408a79 | 21184 | |
53832f31 | 21185 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 21186 | DW_STRING (attr) |
224c3ddb SM |
21187 | = ((const char *) |
21188 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
21189 | demangled, strlen (demangled))); | |
53832f31 TT |
21190 | DW_STRING_IS_CANONICAL (attr) = 1; |
21191 | xfree (demangled); | |
96408a79 SA |
21192 | |
21193 | /* Strip any leading namespaces/classes, keep only the base name. | |
21194 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
21195 | base = strrchr (DW_STRING (attr), ':'); | |
21196 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
21197 | return &base[1]; | |
21198 | else | |
21199 | return DW_STRING (attr); | |
53832f31 TT |
21200 | } |
21201 | } | |
907af001 UW |
21202 | break; |
21203 | ||
71c25dea | 21204 | default: |
907af001 UW |
21205 | break; |
21206 | } | |
21207 | ||
21208 | if (!DW_STRING_IS_CANONICAL (attr)) | |
21209 | { | |
21210 | DW_STRING (attr) | |
21211 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 21212 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 21213 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 21214 | } |
907af001 | 21215 | return DW_STRING (attr); |
9219021c DC |
21216 | } |
21217 | ||
21218 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
21219 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
21220 | containing the return value on output. */ | |
9219021c DC |
21221 | |
21222 | static struct die_info * | |
f2f0e013 | 21223 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
21224 | { |
21225 | struct attribute *attr; | |
9219021c | 21226 | |
f2f0e013 | 21227 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
21228 | if (attr == NULL) |
21229 | return NULL; | |
21230 | ||
f2f0e013 | 21231 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
21232 | } |
21233 | ||
c906108c SS |
21234 | /* Convert a DIE tag into its string name. */ |
21235 | ||
f39c6ffd | 21236 | static const char * |
aa1ee363 | 21237 | dwarf_tag_name (unsigned tag) |
c906108c | 21238 | { |
f39c6ffd TT |
21239 | const char *name = get_DW_TAG_name (tag); |
21240 | ||
21241 | if (name == NULL) | |
21242 | return "DW_TAG_<unknown>"; | |
21243 | ||
21244 | return name; | |
c906108c SS |
21245 | } |
21246 | ||
21247 | /* Convert a DWARF attribute code into its string name. */ | |
21248 | ||
f39c6ffd | 21249 | static const char * |
aa1ee363 | 21250 | dwarf_attr_name (unsigned attr) |
c906108c | 21251 | { |
f39c6ffd TT |
21252 | const char *name; |
21253 | ||
c764a876 | 21254 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
21255 | if (attr == DW_AT_MIPS_fde) |
21256 | return "DW_AT_MIPS_fde"; | |
21257 | #else | |
21258 | if (attr == DW_AT_HP_block_index) | |
21259 | return "DW_AT_HP_block_index"; | |
c764a876 | 21260 | #endif |
f39c6ffd TT |
21261 | |
21262 | name = get_DW_AT_name (attr); | |
21263 | ||
21264 | if (name == NULL) | |
21265 | return "DW_AT_<unknown>"; | |
21266 | ||
21267 | return name; | |
c906108c SS |
21268 | } |
21269 | ||
21270 | /* Convert a DWARF value form code into its string name. */ | |
21271 | ||
f39c6ffd | 21272 | static const char * |
aa1ee363 | 21273 | dwarf_form_name (unsigned form) |
c906108c | 21274 | { |
f39c6ffd TT |
21275 | const char *name = get_DW_FORM_name (form); |
21276 | ||
21277 | if (name == NULL) | |
21278 | return "DW_FORM_<unknown>"; | |
21279 | ||
21280 | return name; | |
c906108c SS |
21281 | } |
21282 | ||
a121b7c1 | 21283 | static const char * |
fba45db2 | 21284 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
21285 | { |
21286 | if (mybool) | |
21287 | return "TRUE"; | |
21288 | else | |
21289 | return "FALSE"; | |
21290 | } | |
21291 | ||
21292 | /* Convert a DWARF type code into its string name. */ | |
21293 | ||
f39c6ffd | 21294 | static const char * |
aa1ee363 | 21295 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 21296 | { |
f39c6ffd | 21297 | const char *name = get_DW_ATE_name (enc); |
c906108c | 21298 | |
f39c6ffd TT |
21299 | if (name == NULL) |
21300 | return "DW_ATE_<unknown>"; | |
c906108c | 21301 | |
f39c6ffd | 21302 | return name; |
c906108c | 21303 | } |
c906108c | 21304 | |
f9aca02d | 21305 | static void |
d97bc12b | 21306 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21307 | { |
21308 | unsigned int i; | |
21309 | ||
d97bc12b DE |
21310 | print_spaces (indent, f); |
21311 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
21312 | dwarf_tag_name (die->tag), die->abbrev, |
21313 | to_underlying (die->sect_off)); | |
d97bc12b DE |
21314 | |
21315 | if (die->parent != NULL) | |
21316 | { | |
21317 | print_spaces (indent, f); | |
21318 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 21319 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
21320 | } |
21321 | ||
21322 | print_spaces (indent, f); | |
21323 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21324 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21325 | |
d97bc12b DE |
21326 | print_spaces (indent, f); |
21327 | fprintf_unfiltered (f, " attributes:\n"); | |
21328 | ||
c906108c SS |
21329 | for (i = 0; i < die->num_attrs; ++i) |
21330 | { | |
d97bc12b DE |
21331 | print_spaces (indent, f); |
21332 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21333 | dwarf_attr_name (die->attrs[i].name), |
21334 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21335 | |
c906108c SS |
21336 | switch (die->attrs[i].form) |
21337 | { | |
c906108c | 21338 | case DW_FORM_addr: |
3019eac3 | 21339 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21340 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21341 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21342 | break; |
21343 | case DW_FORM_block2: | |
21344 | case DW_FORM_block4: | |
21345 | case DW_FORM_block: | |
21346 | case DW_FORM_block1: | |
56eb65bd SP |
21347 | fprintf_unfiltered (f, "block: size %s", |
21348 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21349 | break; |
2dc7f7b3 | 21350 | case DW_FORM_exprloc: |
56eb65bd SP |
21351 | fprintf_unfiltered (f, "expression: size %s", |
21352 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21353 | break; |
0224619f JK |
21354 | case DW_FORM_data16: |
21355 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21356 | break; | |
4568ecf9 DE |
21357 | case DW_FORM_ref_addr: |
21358 | fprintf_unfiltered (f, "ref address: "); | |
21359 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21360 | break; | |
36586728 TT |
21361 | case DW_FORM_GNU_ref_alt: |
21362 | fprintf_unfiltered (f, "alt ref address: "); | |
21363 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21364 | break; | |
10b3939b DJ |
21365 | case DW_FORM_ref1: |
21366 | case DW_FORM_ref2: | |
21367 | case DW_FORM_ref4: | |
4568ecf9 DE |
21368 | case DW_FORM_ref8: |
21369 | case DW_FORM_ref_udata: | |
d97bc12b | 21370 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21371 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21372 | break; |
c906108c SS |
21373 | case DW_FORM_data1: |
21374 | case DW_FORM_data2: | |
21375 | case DW_FORM_data4: | |
ce5d95e1 | 21376 | case DW_FORM_data8: |
c906108c SS |
21377 | case DW_FORM_udata: |
21378 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21379 | fprintf_unfiltered (f, "constant: %s", |
21380 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21381 | break; |
2dc7f7b3 TT |
21382 | case DW_FORM_sec_offset: |
21383 | fprintf_unfiltered (f, "section offset: %s", | |
21384 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21385 | break; | |
55f1336d | 21386 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21387 | fprintf_unfiltered (f, "signature: %s", |
21388 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21389 | break; |
c906108c | 21390 | case DW_FORM_string: |
4bdf3d34 | 21391 | case DW_FORM_strp: |
43988095 | 21392 | case DW_FORM_line_strp: |
3019eac3 | 21393 | case DW_FORM_GNU_str_index: |
36586728 | 21394 | case DW_FORM_GNU_strp_alt: |
8285870a | 21395 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 21396 | DW_STRING (&die->attrs[i]) |
8285870a JK |
21397 | ? DW_STRING (&die->attrs[i]) : "", |
21398 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
21399 | break; |
21400 | case DW_FORM_flag: | |
21401 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 21402 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 21403 | else |
d97bc12b | 21404 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 21405 | break; |
2dc7f7b3 TT |
21406 | case DW_FORM_flag_present: |
21407 | fprintf_unfiltered (f, "flag: TRUE"); | |
21408 | break; | |
a8329558 | 21409 | case DW_FORM_indirect: |
0963b4bd MS |
21410 | /* The reader will have reduced the indirect form to |
21411 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
21412 | fprintf_unfiltered (f, |
21413 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 21414 | break; |
663c44ac JK |
21415 | case DW_FORM_implicit_const: |
21416 | fprintf_unfiltered (f, "constant: %s", | |
21417 | plongest (DW_SND (&die->attrs[i]))); | |
21418 | break; | |
c906108c | 21419 | default: |
d97bc12b | 21420 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 21421 | die->attrs[i].form); |
d97bc12b | 21422 | break; |
c906108c | 21423 | } |
d97bc12b | 21424 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
21425 | } |
21426 | } | |
21427 | ||
f9aca02d | 21428 | static void |
d97bc12b | 21429 | dump_die_for_error (struct die_info *die) |
c906108c | 21430 | { |
d97bc12b DE |
21431 | dump_die_shallow (gdb_stderr, 0, die); |
21432 | } | |
21433 | ||
21434 | static void | |
21435 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
21436 | { | |
21437 | int indent = level * 4; | |
21438 | ||
21439 | gdb_assert (die != NULL); | |
21440 | ||
21441 | if (level >= max_level) | |
21442 | return; | |
21443 | ||
21444 | dump_die_shallow (f, indent, die); | |
21445 | ||
21446 | if (die->child != NULL) | |
c906108c | 21447 | { |
d97bc12b DE |
21448 | print_spaces (indent, f); |
21449 | fprintf_unfiltered (f, " Children:"); | |
21450 | if (level + 1 < max_level) | |
21451 | { | |
21452 | fprintf_unfiltered (f, "\n"); | |
21453 | dump_die_1 (f, level + 1, max_level, die->child); | |
21454 | } | |
21455 | else | |
21456 | { | |
3e43a32a MS |
21457 | fprintf_unfiltered (f, |
21458 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
21459 | } |
21460 | } | |
21461 | ||
21462 | if (die->sibling != NULL && level > 0) | |
21463 | { | |
21464 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
21465 | } |
21466 | } | |
21467 | ||
d97bc12b DE |
21468 | /* This is called from the pdie macro in gdbinit.in. |
21469 | It's not static so gcc will keep a copy callable from gdb. */ | |
21470 | ||
21471 | void | |
21472 | dump_die (struct die_info *die, int max_level) | |
21473 | { | |
21474 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
21475 | } | |
21476 | ||
f9aca02d | 21477 | static void |
51545339 | 21478 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21479 | { |
51545339 | 21480 | void **slot; |
c906108c | 21481 | |
9c541725 PA |
21482 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
21483 | to_underlying (die->sect_off), | |
b64f50a1 | 21484 | INSERT); |
51545339 DJ |
21485 | |
21486 | *slot = die; | |
c906108c SS |
21487 | } |
21488 | ||
b64f50a1 JK |
21489 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
21490 | required kind. */ | |
21491 | ||
21492 | static sect_offset | |
ff39bb5e | 21493 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 21494 | { |
7771576e | 21495 | if (attr_form_is_ref (attr)) |
9c541725 | 21496 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
21497 | |
21498 | complaint (&symfile_complaints, | |
21499 | _("unsupported die ref attribute form: '%s'"), | |
21500 | dwarf_form_name (attr->form)); | |
9c541725 | 21501 | return {}; |
c906108c SS |
21502 | } |
21503 | ||
43bbcdc2 PH |
21504 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
21505 | * the value held by the attribute is not constant. */ | |
a02abb62 | 21506 | |
43bbcdc2 | 21507 | static LONGEST |
ff39bb5e | 21508 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 21509 | { |
663c44ac | 21510 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
21511 | return DW_SND (attr); |
21512 | else if (attr->form == DW_FORM_udata | |
21513 | || attr->form == DW_FORM_data1 | |
21514 | || attr->form == DW_FORM_data2 | |
21515 | || attr->form == DW_FORM_data4 | |
21516 | || attr->form == DW_FORM_data8) | |
21517 | return DW_UNSND (attr); | |
21518 | else | |
21519 | { | |
0224619f | 21520 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
21521 | complaint (&symfile_complaints, |
21522 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
21523 | dwarf_form_name (attr->form)); |
21524 | return default_value; | |
21525 | } | |
21526 | } | |
21527 | ||
348e048f DE |
21528 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
21529 | On entry *REF_CU is the CU of SRC_DIE. | |
21530 | On exit *REF_CU is the CU of the result. */ | |
21531 | ||
21532 | static struct die_info * | |
ff39bb5e | 21533 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
21534 | struct dwarf2_cu **ref_cu) |
21535 | { | |
21536 | struct die_info *die; | |
21537 | ||
7771576e | 21538 | if (attr_form_is_ref (attr)) |
348e048f | 21539 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 21540 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
21541 | die = follow_die_sig (src_die, attr, ref_cu); |
21542 | else | |
21543 | { | |
21544 | dump_die_for_error (src_die); | |
21545 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 21546 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
21547 | } |
21548 | ||
21549 | return die; | |
03dd20cc DJ |
21550 | } |
21551 | ||
5c631832 | 21552 | /* Follow reference OFFSET. |
673bfd45 DE |
21553 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
21554 | On exit *REF_CU is the CU of the result. | |
21555 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 21556 | |
f9aca02d | 21557 | static struct die_info * |
9c541725 | 21558 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 21559 | struct dwarf2_cu **ref_cu) |
c906108c | 21560 | { |
10b3939b | 21561 | struct die_info temp_die; |
f2f0e013 | 21562 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 21563 | |
348e048f DE |
21564 | gdb_assert (cu->per_cu != NULL); |
21565 | ||
98bfdba5 PA |
21566 | target_cu = cu; |
21567 | ||
3019eac3 | 21568 | if (cu->per_cu->is_debug_types) |
348e048f DE |
21569 | { |
21570 | /* .debug_types CUs cannot reference anything outside their CU. | |
21571 | If they need to, they have to reference a signatured type via | |
55f1336d | 21572 | DW_FORM_ref_sig8. */ |
9c541725 | 21573 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 21574 | return NULL; |
348e048f | 21575 | } |
36586728 | 21576 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 21577 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
21578 | { |
21579 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 21580 | |
9c541725 | 21581 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 21582 | cu->objfile); |
03dd20cc DJ |
21583 | |
21584 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
21585 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
21586 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 21587 | |
10b3939b DJ |
21588 | target_cu = per_cu->cu; |
21589 | } | |
98bfdba5 PA |
21590 | else if (cu->dies == NULL) |
21591 | { | |
21592 | /* We're loading full DIEs during partial symbol reading. */ | |
21593 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 21594 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 21595 | } |
c906108c | 21596 | |
f2f0e013 | 21597 | *ref_cu = target_cu; |
9c541725 | 21598 | temp_die.sect_off = sect_off; |
9a3c8263 | 21599 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
21600 | &temp_die, |
21601 | to_underlying (sect_off)); | |
5c631832 | 21602 | } |
10b3939b | 21603 | |
5c631832 JK |
21604 | /* Follow reference attribute ATTR of SRC_DIE. |
21605 | On entry *REF_CU is the CU of SRC_DIE. | |
21606 | On exit *REF_CU is the CU of the result. */ | |
21607 | ||
21608 | static struct die_info * | |
ff39bb5e | 21609 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
21610 | struct dwarf2_cu **ref_cu) |
21611 | { | |
9c541725 | 21612 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
21613 | struct dwarf2_cu *cu = *ref_cu; |
21614 | struct die_info *die; | |
21615 | ||
9c541725 | 21616 | die = follow_die_offset (sect_off, |
36586728 TT |
21617 | (attr->form == DW_FORM_GNU_ref_alt |
21618 | || cu->per_cu->is_dwz), | |
21619 | ref_cu); | |
5c631832 JK |
21620 | if (!die) |
21621 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
21622 | "at 0x%x [in module %s]"), | |
9c541725 | 21623 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 21624 | objfile_name (cu->objfile)); |
348e048f | 21625 | |
5c631832 JK |
21626 | return die; |
21627 | } | |
21628 | ||
9c541725 | 21629 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
21630 | Returned value is intended for DW_OP_call*. Returned |
21631 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
21632 | |
21633 | struct dwarf2_locexpr_baton | |
9c541725 | 21634 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
21635 | struct dwarf2_per_cu_data *per_cu, |
21636 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21637 | void *baton) | |
5c631832 | 21638 | { |
918dd910 | 21639 | struct dwarf2_cu *cu; |
5c631832 JK |
21640 | struct die_info *die; |
21641 | struct attribute *attr; | |
21642 | struct dwarf2_locexpr_baton retval; | |
21643 | ||
8cf6f0b1 TT |
21644 | dw2_setup (per_cu->objfile); |
21645 | ||
918dd910 JK |
21646 | if (per_cu->cu == NULL) |
21647 | load_cu (per_cu); | |
21648 | cu = per_cu->cu; | |
cc12ce38 DE |
21649 | if (cu == NULL) |
21650 | { | |
21651 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21652 | Instead just throw an error, not much else we can do. */ | |
21653 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21654 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21655 | } |
918dd910 | 21656 | |
9c541725 | 21657 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
21658 | if (!die) |
21659 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21660 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21661 | |
21662 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21663 | if (!attr) | |
21664 | { | |
e103e986 JK |
21665 | /* DWARF: "If there is no such attribute, then there is no effect.". |
21666 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 21667 | |
e103e986 | 21668 | retval.data = NULL; |
5c631832 JK |
21669 | retval.size = 0; |
21670 | } | |
8cf6f0b1 TT |
21671 | else if (attr_form_is_section_offset (attr)) |
21672 | { | |
21673 | struct dwarf2_loclist_baton loclist_baton; | |
21674 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
21675 | size_t size; | |
21676 | ||
21677 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
21678 | ||
21679 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
21680 | &size, pc); | |
21681 | retval.size = size; | |
21682 | } | |
5c631832 JK |
21683 | else |
21684 | { | |
21685 | if (!attr_form_is_block (attr)) | |
21686 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
21687 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 21688 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21689 | |
21690 | retval.data = DW_BLOCK (attr)->data; | |
21691 | retval.size = DW_BLOCK (attr)->size; | |
21692 | } | |
21693 | retval.per_cu = cu->per_cu; | |
918dd910 | 21694 | |
918dd910 JK |
21695 | age_cached_comp_units (); |
21696 | ||
5c631832 | 21697 | return retval; |
348e048f DE |
21698 | } |
21699 | ||
8b9737bf TT |
21700 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
21701 | offset. */ | |
21702 | ||
21703 | struct dwarf2_locexpr_baton | |
21704 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
21705 | struct dwarf2_per_cu_data *per_cu, | |
21706 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21707 | void *baton) | |
21708 | { | |
9c541725 | 21709 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 21710 | |
9c541725 | 21711 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
21712 | } |
21713 | ||
b6807d98 TT |
21714 | /* Write a constant of a given type as target-ordered bytes into |
21715 | OBSTACK. */ | |
21716 | ||
21717 | static const gdb_byte * | |
21718 | write_constant_as_bytes (struct obstack *obstack, | |
21719 | enum bfd_endian byte_order, | |
21720 | struct type *type, | |
21721 | ULONGEST value, | |
21722 | LONGEST *len) | |
21723 | { | |
21724 | gdb_byte *result; | |
21725 | ||
21726 | *len = TYPE_LENGTH (type); | |
224c3ddb | 21727 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21728 | store_unsigned_integer (result, *len, byte_order, value); |
21729 | ||
21730 | return result; | |
21731 | } | |
21732 | ||
21733 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
21734 | pointer to the constant bytes and set LEN to the length of the | |
21735 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
21736 | does not have a DW_AT_const_value, return NULL. */ | |
21737 | ||
21738 | const gdb_byte * | |
9c541725 | 21739 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
21740 | struct dwarf2_per_cu_data *per_cu, |
21741 | struct obstack *obstack, | |
21742 | LONGEST *len) | |
21743 | { | |
21744 | struct dwarf2_cu *cu; | |
21745 | struct die_info *die; | |
21746 | struct attribute *attr; | |
21747 | const gdb_byte *result = NULL; | |
21748 | struct type *type; | |
21749 | LONGEST value; | |
21750 | enum bfd_endian byte_order; | |
21751 | ||
21752 | dw2_setup (per_cu->objfile); | |
21753 | ||
21754 | if (per_cu->cu == NULL) | |
21755 | load_cu (per_cu); | |
21756 | cu = per_cu->cu; | |
cc12ce38 DE |
21757 | if (cu == NULL) |
21758 | { | |
21759 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21760 | Instead just throw an error, not much else we can do. */ | |
21761 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21762 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21763 | } |
b6807d98 | 21764 | |
9c541725 | 21765 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
21766 | if (!die) |
21767 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21768 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
21769 | |
21770 | ||
21771 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21772 | if (attr == NULL) | |
21773 | return NULL; | |
21774 | ||
21775 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
21776 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21777 | ||
21778 | switch (attr->form) | |
21779 | { | |
21780 | case DW_FORM_addr: | |
21781 | case DW_FORM_GNU_addr_index: | |
21782 | { | |
21783 | gdb_byte *tem; | |
21784 | ||
21785 | *len = cu->header.addr_size; | |
224c3ddb | 21786 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21787 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
21788 | result = tem; | |
21789 | } | |
21790 | break; | |
21791 | case DW_FORM_string: | |
21792 | case DW_FORM_strp: | |
21793 | case DW_FORM_GNU_str_index: | |
21794 | case DW_FORM_GNU_strp_alt: | |
21795 | /* DW_STRING is already allocated on the objfile obstack, point | |
21796 | directly to it. */ | |
21797 | result = (const gdb_byte *) DW_STRING (attr); | |
21798 | *len = strlen (DW_STRING (attr)); | |
21799 | break; | |
21800 | case DW_FORM_block1: | |
21801 | case DW_FORM_block2: | |
21802 | case DW_FORM_block4: | |
21803 | case DW_FORM_block: | |
21804 | case DW_FORM_exprloc: | |
0224619f | 21805 | case DW_FORM_data16: |
b6807d98 TT |
21806 | result = DW_BLOCK (attr)->data; |
21807 | *len = DW_BLOCK (attr)->size; | |
21808 | break; | |
21809 | ||
21810 | /* The DW_AT_const_value attributes are supposed to carry the | |
21811 | symbol's value "represented as it would be on the target | |
21812 | architecture." By the time we get here, it's already been | |
21813 | converted to host endianness, so we just need to sign- or | |
21814 | zero-extend it as appropriate. */ | |
21815 | case DW_FORM_data1: | |
21816 | type = die_type (die, cu); | |
21817 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
21818 | if (result == NULL) | |
21819 | result = write_constant_as_bytes (obstack, byte_order, | |
21820 | type, value, len); | |
21821 | break; | |
21822 | case DW_FORM_data2: | |
21823 | type = die_type (die, cu); | |
21824 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
21825 | if (result == NULL) | |
21826 | result = write_constant_as_bytes (obstack, byte_order, | |
21827 | type, value, len); | |
21828 | break; | |
21829 | case DW_FORM_data4: | |
21830 | type = die_type (die, cu); | |
21831 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
21832 | if (result == NULL) | |
21833 | result = write_constant_as_bytes (obstack, byte_order, | |
21834 | type, value, len); | |
21835 | break; | |
21836 | case DW_FORM_data8: | |
21837 | type = die_type (die, cu); | |
21838 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
21839 | if (result == NULL) | |
21840 | result = write_constant_as_bytes (obstack, byte_order, | |
21841 | type, value, len); | |
21842 | break; | |
21843 | ||
21844 | case DW_FORM_sdata: | |
663c44ac | 21845 | case DW_FORM_implicit_const: |
b6807d98 TT |
21846 | type = die_type (die, cu); |
21847 | result = write_constant_as_bytes (obstack, byte_order, | |
21848 | type, DW_SND (attr), len); | |
21849 | break; | |
21850 | ||
21851 | case DW_FORM_udata: | |
21852 | type = die_type (die, cu); | |
21853 | result = write_constant_as_bytes (obstack, byte_order, | |
21854 | type, DW_UNSND (attr), len); | |
21855 | break; | |
21856 | ||
21857 | default: | |
21858 | complaint (&symfile_complaints, | |
21859 | _("unsupported const value attribute form: '%s'"), | |
21860 | dwarf_form_name (attr->form)); | |
21861 | break; | |
21862 | } | |
21863 | ||
21864 | return result; | |
21865 | } | |
21866 | ||
7942e96e AA |
21867 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
21868 | valid type for this die is found. */ | |
21869 | ||
21870 | struct type * | |
9c541725 | 21871 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
21872 | struct dwarf2_per_cu_data *per_cu) |
21873 | { | |
21874 | struct dwarf2_cu *cu; | |
21875 | struct die_info *die; | |
21876 | ||
21877 | dw2_setup (per_cu->objfile); | |
21878 | ||
21879 | if (per_cu->cu == NULL) | |
21880 | load_cu (per_cu); | |
21881 | cu = per_cu->cu; | |
21882 | if (!cu) | |
21883 | return NULL; | |
21884 | ||
9c541725 | 21885 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
21886 | if (!die) |
21887 | return NULL; | |
21888 | ||
21889 | return die_type (die, cu); | |
21890 | } | |
21891 | ||
8a9b8146 TT |
21892 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
21893 | PER_CU. */ | |
21894 | ||
21895 | struct type * | |
b64f50a1 | 21896 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
21897 | struct dwarf2_per_cu_data *per_cu) |
21898 | { | |
8a9b8146 | 21899 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21900 | |
9c541725 | 21901 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21902 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21903 | } |
21904 | ||
ac9ec31b | 21905 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21906 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21907 | On exit *REF_CU is the CU of the result. |
21908 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21909 | |
21910 | static struct die_info * | |
ac9ec31b DE |
21911 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21912 | struct dwarf2_cu **ref_cu) | |
348e048f | 21913 | { |
348e048f | 21914 | struct die_info temp_die; |
348e048f DE |
21915 | struct dwarf2_cu *sig_cu; |
21916 | struct die_info *die; | |
21917 | ||
ac9ec31b DE |
21918 | /* While it might be nice to assert sig_type->type == NULL here, |
21919 | we can get here for DW_AT_imported_declaration where we need | |
21920 | the DIE not the type. */ | |
348e048f DE |
21921 | |
21922 | /* If necessary, add it to the queue and load its DIEs. */ | |
21923 | ||
95554aad | 21924 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21925 | read_signatured_type (sig_type); |
348e048f | 21926 | |
348e048f | 21927 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21928 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21929 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21930 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21931 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21932 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21933 | if (die) |
21934 | { | |
796a7ff8 DE |
21935 | /* For .gdb_index version 7 keep track of included TUs. |
21936 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21937 | if (dwarf2_per_objfile->index_table != NULL | |
21938 | && dwarf2_per_objfile->index_table->version <= 7) | |
21939 | { | |
21940 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21941 | (*ref_cu)->per_cu->imported_symtabs, | |
21942 | sig_cu->per_cu); | |
21943 | } | |
21944 | ||
348e048f DE |
21945 | *ref_cu = sig_cu; |
21946 | return die; | |
21947 | } | |
21948 | ||
ac9ec31b DE |
21949 | return NULL; |
21950 | } | |
21951 | ||
21952 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21953 | On entry *REF_CU is the CU of SRC_DIE. | |
21954 | On exit *REF_CU is the CU of the result. | |
21955 | The result is the DIE of the type. | |
21956 | If the referenced type cannot be found an error is thrown. */ | |
21957 | ||
21958 | static struct die_info * | |
ff39bb5e | 21959 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21960 | struct dwarf2_cu **ref_cu) |
21961 | { | |
21962 | ULONGEST signature = DW_SIGNATURE (attr); | |
21963 | struct signatured_type *sig_type; | |
21964 | struct die_info *die; | |
21965 | ||
21966 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21967 | ||
a2ce51a0 | 21968 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21969 | /* sig_type will be NULL if the signatured type is missing from |
21970 | the debug info. */ | |
21971 | if (sig_type == NULL) | |
21972 | { | |
21973 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21974 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21975 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21976 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21977 | } |
21978 | ||
21979 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
21980 | if (die == NULL) | |
21981 | { | |
21982 | dump_die_for_error (src_die); | |
21983 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21984 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21985 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21986 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21987 | } |
21988 | ||
21989 | return die; | |
21990 | } | |
21991 | ||
21992 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
21993 | reading in and processing the type unit if necessary. */ | |
21994 | ||
21995 | static struct type * | |
21996 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
21997 | struct dwarf2_cu *cu) | |
21998 | { | |
21999 | struct signatured_type *sig_type; | |
22000 | struct dwarf2_cu *type_cu; | |
22001 | struct die_info *type_die; | |
22002 | struct type *type; | |
22003 | ||
a2ce51a0 | 22004 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
22005 | /* sig_type will be NULL if the signatured type is missing from |
22006 | the debug info. */ | |
22007 | if (sig_type == NULL) | |
22008 | { | |
22009 | complaint (&symfile_complaints, | |
22010 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
22011 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 22012 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22013 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22014 | return build_error_marker_type (cu, die); |
22015 | } | |
22016 | ||
22017 | /* If we already know the type we're done. */ | |
22018 | if (sig_type->type != NULL) | |
22019 | return sig_type->type; | |
22020 | ||
22021 | type_cu = cu; | |
22022 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
22023 | if (type_die != NULL) | |
22024 | { | |
22025 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
22026 | is created. This is important, for example, because for c++ classes | |
22027 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
22028 | type = read_type_die (type_die, type_cu); | |
22029 | if (type == NULL) | |
22030 | { | |
22031 | complaint (&symfile_complaints, | |
22032 | _("Dwarf Error: Cannot build signatured type %s" | |
22033 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 22034 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22035 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22036 | type = build_error_marker_type (cu, die); |
22037 | } | |
22038 | } | |
22039 | else | |
22040 | { | |
22041 | complaint (&symfile_complaints, | |
22042 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
22043 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 22044 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 22045 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22046 | type = build_error_marker_type (cu, die); |
22047 | } | |
22048 | sig_type->type = type; | |
22049 | ||
22050 | return type; | |
22051 | } | |
22052 | ||
22053 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
22054 | reading in and processing the type unit if necessary. */ | |
22055 | ||
22056 | static struct type * | |
ff39bb5e | 22057 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 22058 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
22059 | { |
22060 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 22061 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
22062 | { |
22063 | struct dwarf2_cu *type_cu = cu; | |
22064 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
22065 | ||
22066 | return read_type_die (type_die, type_cu); | |
22067 | } | |
22068 | else if (attr->form == DW_FORM_ref_sig8) | |
22069 | { | |
22070 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
22071 | } | |
22072 | else | |
22073 | { | |
22074 | complaint (&symfile_complaints, | |
22075 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
22076 | " at 0x%x [in module %s]"), | |
9c541725 | 22077 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 22078 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22079 | return build_error_marker_type (cu, die); |
22080 | } | |
348e048f DE |
22081 | } |
22082 | ||
e5fe5e75 | 22083 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
22084 | |
22085 | static void | |
e5fe5e75 | 22086 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 22087 | { |
52dc124a | 22088 | struct signatured_type *sig_type; |
348e048f | 22089 | |
f4dc4d17 DE |
22090 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
22091 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
22092 | ||
6721b2ec DE |
22093 | /* We have the per_cu, but we need the signatured_type. |
22094 | Fortunately this is an easy translation. */ | |
22095 | gdb_assert (per_cu->is_debug_types); | |
22096 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 22097 | |
6721b2ec | 22098 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22099 | |
52dc124a | 22100 | read_signatured_type (sig_type); |
348e048f | 22101 | |
6721b2ec | 22102 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
22103 | } |
22104 | ||
dee91e82 DE |
22105 | /* die_reader_func for read_signatured_type. |
22106 | This is identical to load_full_comp_unit_reader, | |
22107 | but is kept separate for now. */ | |
348e048f DE |
22108 | |
22109 | static void | |
dee91e82 | 22110 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 22111 | const gdb_byte *info_ptr, |
dee91e82 DE |
22112 | struct die_info *comp_unit_die, |
22113 | int has_children, | |
22114 | void *data) | |
348e048f | 22115 | { |
dee91e82 | 22116 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 22117 | |
dee91e82 DE |
22118 | gdb_assert (cu->die_hash == NULL); |
22119 | cu->die_hash = | |
22120 | htab_create_alloc_ex (cu->header.length / 12, | |
22121 | die_hash, | |
22122 | die_eq, | |
22123 | NULL, | |
22124 | &cu->comp_unit_obstack, | |
22125 | hashtab_obstack_allocate, | |
22126 | dummy_obstack_deallocate); | |
348e048f | 22127 | |
dee91e82 DE |
22128 | if (has_children) |
22129 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
22130 | &info_ptr, comp_unit_die); | |
22131 | cu->dies = comp_unit_die; | |
22132 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
22133 | |
22134 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 22135 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 22136 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
22137 | or we won't be able to build types correctly. |
22138 | Similarly, if we do not read the producer, we can not apply | |
22139 | producer-specific interpretation. */ | |
95554aad | 22140 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 22141 | } |
348e048f | 22142 | |
3019eac3 DE |
22143 | /* Read in a signatured type and build its CU and DIEs. |
22144 | If the type is a stub for the real type in a DWO file, | |
22145 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
22146 | |
22147 | static void | |
22148 | read_signatured_type (struct signatured_type *sig_type) | |
22149 | { | |
22150 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 22151 | |
3019eac3 | 22152 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 22153 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22154 | |
f4dc4d17 DE |
22155 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
22156 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 22157 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
22158 | } |
22159 | ||
c906108c SS |
22160 | /* Decode simple location descriptions. |
22161 | Given a pointer to a dwarf block that defines a location, compute | |
22162 | the location and return the value. | |
22163 | ||
4cecd739 DJ |
22164 | NOTE drow/2003-11-18: This function is called in two situations |
22165 | now: for the address of static or global variables (partial symbols | |
22166 | only) and for offsets into structures which are expected to be | |
22167 | (more or less) constant. The partial symbol case should go away, | |
22168 | and only the constant case should remain. That will let this | |
22169 | function complain more accurately. A few special modes are allowed | |
22170 | without complaint for global variables (for instance, global | |
22171 | register values and thread-local values). | |
c906108c SS |
22172 | |
22173 | A location description containing no operations indicates that the | |
4cecd739 | 22174 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
22175 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
22176 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
22177 | complaint. |
22178 | ||
22179 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
22180 | |
22181 | static CORE_ADDR | |
e7c27a73 | 22182 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 22183 | { |
e7c27a73 | 22184 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
22185 | size_t i; |
22186 | size_t size = blk->size; | |
d521ce57 | 22187 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
22188 | CORE_ADDR stack[64]; |
22189 | int stacki; | |
22190 | unsigned int bytes_read, unsnd; | |
22191 | gdb_byte op; | |
c906108c | 22192 | |
21ae7a4d JK |
22193 | i = 0; |
22194 | stacki = 0; | |
22195 | stack[stacki] = 0; | |
22196 | stack[++stacki] = 0; | |
22197 | ||
22198 | while (i < size) | |
22199 | { | |
22200 | op = data[i++]; | |
22201 | switch (op) | |
22202 | { | |
22203 | case DW_OP_lit0: | |
22204 | case DW_OP_lit1: | |
22205 | case DW_OP_lit2: | |
22206 | case DW_OP_lit3: | |
22207 | case DW_OP_lit4: | |
22208 | case DW_OP_lit5: | |
22209 | case DW_OP_lit6: | |
22210 | case DW_OP_lit7: | |
22211 | case DW_OP_lit8: | |
22212 | case DW_OP_lit9: | |
22213 | case DW_OP_lit10: | |
22214 | case DW_OP_lit11: | |
22215 | case DW_OP_lit12: | |
22216 | case DW_OP_lit13: | |
22217 | case DW_OP_lit14: | |
22218 | case DW_OP_lit15: | |
22219 | case DW_OP_lit16: | |
22220 | case DW_OP_lit17: | |
22221 | case DW_OP_lit18: | |
22222 | case DW_OP_lit19: | |
22223 | case DW_OP_lit20: | |
22224 | case DW_OP_lit21: | |
22225 | case DW_OP_lit22: | |
22226 | case DW_OP_lit23: | |
22227 | case DW_OP_lit24: | |
22228 | case DW_OP_lit25: | |
22229 | case DW_OP_lit26: | |
22230 | case DW_OP_lit27: | |
22231 | case DW_OP_lit28: | |
22232 | case DW_OP_lit29: | |
22233 | case DW_OP_lit30: | |
22234 | case DW_OP_lit31: | |
22235 | stack[++stacki] = op - DW_OP_lit0; | |
22236 | break; | |
f1bea926 | 22237 | |
21ae7a4d JK |
22238 | case DW_OP_reg0: |
22239 | case DW_OP_reg1: | |
22240 | case DW_OP_reg2: | |
22241 | case DW_OP_reg3: | |
22242 | case DW_OP_reg4: | |
22243 | case DW_OP_reg5: | |
22244 | case DW_OP_reg6: | |
22245 | case DW_OP_reg7: | |
22246 | case DW_OP_reg8: | |
22247 | case DW_OP_reg9: | |
22248 | case DW_OP_reg10: | |
22249 | case DW_OP_reg11: | |
22250 | case DW_OP_reg12: | |
22251 | case DW_OP_reg13: | |
22252 | case DW_OP_reg14: | |
22253 | case DW_OP_reg15: | |
22254 | case DW_OP_reg16: | |
22255 | case DW_OP_reg17: | |
22256 | case DW_OP_reg18: | |
22257 | case DW_OP_reg19: | |
22258 | case DW_OP_reg20: | |
22259 | case DW_OP_reg21: | |
22260 | case DW_OP_reg22: | |
22261 | case DW_OP_reg23: | |
22262 | case DW_OP_reg24: | |
22263 | case DW_OP_reg25: | |
22264 | case DW_OP_reg26: | |
22265 | case DW_OP_reg27: | |
22266 | case DW_OP_reg28: | |
22267 | case DW_OP_reg29: | |
22268 | case DW_OP_reg30: | |
22269 | case DW_OP_reg31: | |
22270 | stack[++stacki] = op - DW_OP_reg0; | |
22271 | if (i < size) | |
22272 | dwarf2_complex_location_expr_complaint (); | |
22273 | break; | |
c906108c | 22274 | |
21ae7a4d JK |
22275 | case DW_OP_regx: |
22276 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
22277 | i += bytes_read; | |
22278 | stack[++stacki] = unsnd; | |
22279 | if (i < size) | |
22280 | dwarf2_complex_location_expr_complaint (); | |
22281 | break; | |
c906108c | 22282 | |
21ae7a4d JK |
22283 | case DW_OP_addr: |
22284 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
22285 | cu, &bytes_read); | |
22286 | i += bytes_read; | |
22287 | break; | |
d53d4ac5 | 22288 | |
21ae7a4d JK |
22289 | case DW_OP_const1u: |
22290 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
22291 | i += 1; | |
22292 | break; | |
22293 | ||
22294 | case DW_OP_const1s: | |
22295 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
22296 | i += 1; | |
22297 | break; | |
22298 | ||
22299 | case DW_OP_const2u: | |
22300 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
22301 | i += 2; | |
22302 | break; | |
22303 | ||
22304 | case DW_OP_const2s: | |
22305 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22306 | i += 2; | |
22307 | break; | |
d53d4ac5 | 22308 | |
21ae7a4d JK |
22309 | case DW_OP_const4u: |
22310 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22311 | i += 4; | |
22312 | break; | |
22313 | ||
22314 | case DW_OP_const4s: | |
22315 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22316 | i += 4; | |
22317 | break; | |
22318 | ||
585861ea JK |
22319 | case DW_OP_const8u: |
22320 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22321 | i += 8; | |
22322 | break; | |
22323 | ||
21ae7a4d JK |
22324 | case DW_OP_constu: |
22325 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22326 | &bytes_read); | |
22327 | i += bytes_read; | |
22328 | break; | |
22329 | ||
22330 | case DW_OP_consts: | |
22331 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22332 | i += bytes_read; | |
22333 | break; | |
22334 | ||
22335 | case DW_OP_dup: | |
22336 | stack[stacki + 1] = stack[stacki]; | |
22337 | stacki++; | |
22338 | break; | |
22339 | ||
22340 | case DW_OP_plus: | |
22341 | stack[stacki - 1] += stack[stacki]; | |
22342 | stacki--; | |
22343 | break; | |
22344 | ||
22345 | case DW_OP_plus_uconst: | |
22346 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22347 | &bytes_read); | |
22348 | i += bytes_read; | |
22349 | break; | |
22350 | ||
22351 | case DW_OP_minus: | |
22352 | stack[stacki - 1] -= stack[stacki]; | |
22353 | stacki--; | |
22354 | break; | |
22355 | ||
22356 | case DW_OP_deref: | |
22357 | /* If we're not the last op, then we definitely can't encode | |
22358 | this using GDB's address_class enum. This is valid for partial | |
22359 | global symbols, although the variable's address will be bogus | |
22360 | in the psymtab. */ | |
22361 | if (i < size) | |
22362 | dwarf2_complex_location_expr_complaint (); | |
22363 | break; | |
22364 | ||
22365 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22366 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22367 | /* The top of the stack has the offset from the beginning |
22368 | of the thread control block at which the variable is located. */ | |
22369 | /* Nothing should follow this operator, so the top of stack would | |
22370 | be returned. */ | |
22371 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
22372 | address will be bogus in the psymtab. Make it always at least |
22373 | non-zero to not look as a variable garbage collected by linker | |
22374 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
22375 | if (i < size) |
22376 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 22377 | stack[stacki]++; |
21ae7a4d JK |
22378 | break; |
22379 | ||
22380 | case DW_OP_GNU_uninit: | |
22381 | break; | |
22382 | ||
3019eac3 | 22383 | case DW_OP_GNU_addr_index: |
49f6c839 | 22384 | case DW_OP_GNU_const_index: |
3019eac3 DE |
22385 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
22386 | &bytes_read); | |
22387 | i += bytes_read; | |
22388 | break; | |
22389 | ||
21ae7a4d JK |
22390 | default: |
22391 | { | |
f39c6ffd | 22392 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
22393 | |
22394 | if (name) | |
22395 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
22396 | name); | |
22397 | else | |
22398 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
22399 | op); | |
22400 | } | |
22401 | ||
22402 | return (stack[stacki]); | |
d53d4ac5 | 22403 | } |
3c6e0cb3 | 22404 | |
21ae7a4d JK |
22405 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
22406 | outside of the allocated space. Also enforce minimum>0. */ | |
22407 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
22408 | { | |
22409 | complaint (&symfile_complaints, | |
22410 | _("location description stack overflow")); | |
22411 | return 0; | |
22412 | } | |
22413 | ||
22414 | if (stacki <= 0) | |
22415 | { | |
22416 | complaint (&symfile_complaints, | |
22417 | _("location description stack underflow")); | |
22418 | return 0; | |
22419 | } | |
22420 | } | |
22421 | return (stack[stacki]); | |
c906108c SS |
22422 | } |
22423 | ||
22424 | /* memory allocation interface */ | |
22425 | ||
c906108c | 22426 | static struct dwarf_block * |
7b5a2f43 | 22427 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 22428 | { |
8d749320 | 22429 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
22430 | } |
22431 | ||
c906108c | 22432 | static struct die_info * |
b60c80d6 | 22433 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
22434 | { |
22435 | struct die_info *die; | |
b60c80d6 DJ |
22436 | size_t size = sizeof (struct die_info); |
22437 | ||
22438 | if (num_attrs > 1) | |
22439 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 22440 | |
b60c80d6 | 22441 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
22442 | memset (die, 0, sizeof (struct die_info)); |
22443 | return (die); | |
22444 | } | |
2e276125 JB |
22445 | |
22446 | \f | |
22447 | /* Macro support. */ | |
22448 | ||
233d95b5 JK |
22449 | /* Return file name relative to the compilation directory of file number I in |
22450 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 22451 | responsible for freeing it. */ |
233d95b5 | 22452 | |
2e276125 | 22453 | static char * |
233d95b5 | 22454 | file_file_name (int file, struct line_header *lh) |
2e276125 | 22455 | { |
6a83a1e6 EZ |
22456 | /* Is the file number a valid index into the line header's file name |
22457 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22458 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 22459 | { |
8c43009f | 22460 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 22461 | |
8c43009f PA |
22462 | if (!IS_ABSOLUTE_PATH (fe.name)) |
22463 | { | |
22464 | const char *dir = fe.include_dir (lh); | |
22465 | if (dir != NULL) | |
22466 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
22467 | } | |
22468 | return xstrdup (fe.name); | |
6a83a1e6 | 22469 | } |
2e276125 JB |
22470 | else |
22471 | { | |
6a83a1e6 EZ |
22472 | /* The compiler produced a bogus file number. We can at least |
22473 | record the macro definitions made in the file, even if we | |
22474 | won't be able to find the file by name. */ | |
22475 | char fake_name[80]; | |
9a619af0 | 22476 | |
8c042590 PM |
22477 | xsnprintf (fake_name, sizeof (fake_name), |
22478 | "<bad macro file number %d>", file); | |
2e276125 | 22479 | |
6e70227d | 22480 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
22481 | _("bad file number in macro information (%d)"), |
22482 | file); | |
2e276125 | 22483 | |
6a83a1e6 | 22484 | return xstrdup (fake_name); |
2e276125 JB |
22485 | } |
22486 | } | |
22487 | ||
233d95b5 JK |
22488 | /* Return the full name of file number I in *LH's file name table. |
22489 | Use COMP_DIR as the name of the current directory of the | |
22490 | compilation. The result is allocated using xmalloc; the caller is | |
22491 | responsible for freeing it. */ | |
22492 | static char * | |
22493 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
22494 | { | |
22495 | /* Is the file number a valid index into the line header's file name | |
22496 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22497 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
22498 | { |
22499 | char *relative = file_file_name (file, lh); | |
22500 | ||
22501 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
22502 | return relative; | |
b36cec19 PA |
22503 | return reconcat (relative, comp_dir, SLASH_STRING, |
22504 | relative, (char *) NULL); | |
233d95b5 JK |
22505 | } |
22506 | else | |
22507 | return file_file_name (file, lh); | |
22508 | } | |
22509 | ||
2e276125 JB |
22510 | |
22511 | static struct macro_source_file * | |
22512 | macro_start_file (int file, int line, | |
22513 | struct macro_source_file *current_file, | |
43f3e411 | 22514 | struct line_header *lh) |
2e276125 | 22515 | { |
233d95b5 JK |
22516 | /* File name relative to the compilation directory of this source file. */ |
22517 | char *file_name = file_file_name (file, lh); | |
2e276125 | 22518 | |
2e276125 | 22519 | if (! current_file) |
abc9d0dc | 22520 | { |
fc474241 DE |
22521 | /* Note: We don't create a macro table for this compilation unit |
22522 | at all until we actually get a filename. */ | |
43f3e411 | 22523 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 22524 | |
abc9d0dc TT |
22525 | /* If we have no current file, then this must be the start_file |
22526 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
22527 | current_file = macro_set_main (macro_table, file_name); |
22528 | macro_define_special (macro_table); | |
abc9d0dc | 22529 | } |
2e276125 | 22530 | else |
233d95b5 | 22531 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 22532 | |
233d95b5 | 22533 | xfree (file_name); |
6e70227d | 22534 | |
2e276125 JB |
22535 | return current_file; |
22536 | } | |
22537 | ||
2e276125 JB |
22538 | static const char * |
22539 | consume_improper_spaces (const char *p, const char *body) | |
22540 | { | |
22541 | if (*p == ' ') | |
22542 | { | |
4d3c2250 | 22543 | complaint (&symfile_complaints, |
3e43a32a MS |
22544 | _("macro definition contains spaces " |
22545 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 22546 | body); |
2e276125 JB |
22547 | |
22548 | while (*p == ' ') | |
22549 | p++; | |
22550 | } | |
22551 | ||
22552 | return p; | |
22553 | } | |
22554 | ||
22555 | ||
22556 | static void | |
22557 | parse_macro_definition (struct macro_source_file *file, int line, | |
22558 | const char *body) | |
22559 | { | |
22560 | const char *p; | |
22561 | ||
22562 | /* The body string takes one of two forms. For object-like macro | |
22563 | definitions, it should be: | |
22564 | ||
22565 | <macro name> " " <definition> | |
22566 | ||
22567 | For function-like macro definitions, it should be: | |
22568 | ||
22569 | <macro name> "() " <definition> | |
22570 | or | |
22571 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
22572 | ||
22573 | Spaces may appear only where explicitly indicated, and in the | |
22574 | <definition>. | |
22575 | ||
22576 | The Dwarf 2 spec says that an object-like macro's name is always | |
22577 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 22578 | the space when the macro's definition is the empty string. |
2e276125 JB |
22579 | |
22580 | The Dwarf 2 spec says that there should be no spaces between the | |
22581 | formal arguments in a function-like macro's formal argument list, | |
22582 | but versions of GCC around March 2002 include spaces after the | |
22583 | commas. */ | |
22584 | ||
22585 | ||
22586 | /* Find the extent of the macro name. The macro name is terminated | |
22587 | by either a space or null character (for an object-like macro) or | |
22588 | an opening paren (for a function-like macro). */ | |
22589 | for (p = body; *p; p++) | |
22590 | if (*p == ' ' || *p == '(') | |
22591 | break; | |
22592 | ||
22593 | if (*p == ' ' || *p == '\0') | |
22594 | { | |
22595 | /* It's an object-like macro. */ | |
22596 | int name_len = p - body; | |
3f8a7804 | 22597 | char *name = savestring (body, name_len); |
2e276125 JB |
22598 | const char *replacement; |
22599 | ||
22600 | if (*p == ' ') | |
22601 | replacement = body + name_len + 1; | |
22602 | else | |
22603 | { | |
4d3c2250 | 22604 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22605 | replacement = body + name_len; |
22606 | } | |
6e70227d | 22607 | |
2e276125 JB |
22608 | macro_define_object (file, line, name, replacement); |
22609 | ||
22610 | xfree (name); | |
22611 | } | |
22612 | else if (*p == '(') | |
22613 | { | |
22614 | /* It's a function-like macro. */ | |
3f8a7804 | 22615 | char *name = savestring (body, p - body); |
2e276125 JB |
22616 | int argc = 0; |
22617 | int argv_size = 1; | |
8d749320 | 22618 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
22619 | |
22620 | p++; | |
22621 | ||
22622 | p = consume_improper_spaces (p, body); | |
22623 | ||
22624 | /* Parse the formal argument list. */ | |
22625 | while (*p && *p != ')') | |
22626 | { | |
22627 | /* Find the extent of the current argument name. */ | |
22628 | const char *arg_start = p; | |
22629 | ||
22630 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
22631 | p++; | |
22632 | ||
22633 | if (! *p || p == arg_start) | |
4d3c2250 | 22634 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22635 | else |
22636 | { | |
22637 | /* Make sure argv has room for the new argument. */ | |
22638 | if (argc >= argv_size) | |
22639 | { | |
22640 | argv_size *= 2; | |
224c3ddb | 22641 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
22642 | } |
22643 | ||
3f8a7804 | 22644 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
22645 | } |
22646 | ||
22647 | p = consume_improper_spaces (p, body); | |
22648 | ||
22649 | /* Consume the comma, if present. */ | |
22650 | if (*p == ',') | |
22651 | { | |
22652 | p++; | |
22653 | ||
22654 | p = consume_improper_spaces (p, body); | |
22655 | } | |
22656 | } | |
22657 | ||
22658 | if (*p == ')') | |
22659 | { | |
22660 | p++; | |
22661 | ||
22662 | if (*p == ' ') | |
22663 | /* Perfectly formed definition, no complaints. */ | |
22664 | macro_define_function (file, line, name, | |
6e70227d | 22665 | argc, (const char **) argv, |
2e276125 JB |
22666 | p + 1); |
22667 | else if (*p == '\0') | |
22668 | { | |
22669 | /* Complain, but do define it. */ | |
4d3c2250 | 22670 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 22671 | macro_define_function (file, line, name, |
6e70227d | 22672 | argc, (const char **) argv, |
2e276125 JB |
22673 | p); |
22674 | } | |
22675 | else | |
22676 | /* Just complain. */ | |
4d3c2250 | 22677 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22678 | } |
22679 | else | |
22680 | /* Just complain. */ | |
4d3c2250 | 22681 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22682 | |
22683 | xfree (name); | |
22684 | { | |
22685 | int i; | |
22686 | ||
22687 | for (i = 0; i < argc; i++) | |
22688 | xfree (argv[i]); | |
22689 | } | |
22690 | xfree (argv); | |
22691 | } | |
22692 | else | |
4d3c2250 | 22693 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22694 | } |
22695 | ||
cf2c3c16 TT |
22696 | /* Skip some bytes from BYTES according to the form given in FORM. |
22697 | Returns the new pointer. */ | |
2e276125 | 22698 | |
d521ce57 TT |
22699 | static const gdb_byte * |
22700 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
22701 | enum dwarf_form form, |
22702 | unsigned int offset_size, | |
22703 | struct dwarf2_section_info *section) | |
2e276125 | 22704 | { |
cf2c3c16 | 22705 | unsigned int bytes_read; |
2e276125 | 22706 | |
cf2c3c16 | 22707 | switch (form) |
2e276125 | 22708 | { |
cf2c3c16 TT |
22709 | case DW_FORM_data1: |
22710 | case DW_FORM_flag: | |
22711 | ++bytes; | |
22712 | break; | |
22713 | ||
22714 | case DW_FORM_data2: | |
22715 | bytes += 2; | |
22716 | break; | |
22717 | ||
22718 | case DW_FORM_data4: | |
22719 | bytes += 4; | |
22720 | break; | |
22721 | ||
22722 | case DW_FORM_data8: | |
22723 | bytes += 8; | |
22724 | break; | |
22725 | ||
0224619f JK |
22726 | case DW_FORM_data16: |
22727 | bytes += 16; | |
22728 | break; | |
22729 | ||
cf2c3c16 TT |
22730 | case DW_FORM_string: |
22731 | read_direct_string (abfd, bytes, &bytes_read); | |
22732 | bytes += bytes_read; | |
22733 | break; | |
22734 | ||
22735 | case DW_FORM_sec_offset: | |
22736 | case DW_FORM_strp: | |
36586728 | 22737 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
22738 | bytes += offset_size; |
22739 | break; | |
22740 | ||
22741 | case DW_FORM_block: | |
22742 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
22743 | bytes += bytes_read; | |
22744 | break; | |
22745 | ||
22746 | case DW_FORM_block1: | |
22747 | bytes += 1 + read_1_byte (abfd, bytes); | |
22748 | break; | |
22749 | case DW_FORM_block2: | |
22750 | bytes += 2 + read_2_bytes (abfd, bytes); | |
22751 | break; | |
22752 | case DW_FORM_block4: | |
22753 | bytes += 4 + read_4_bytes (abfd, bytes); | |
22754 | break; | |
22755 | ||
22756 | case DW_FORM_sdata: | |
22757 | case DW_FORM_udata: | |
3019eac3 DE |
22758 | case DW_FORM_GNU_addr_index: |
22759 | case DW_FORM_GNU_str_index: | |
d521ce57 | 22760 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
22761 | if (bytes == NULL) |
22762 | { | |
22763 | dwarf2_section_buffer_overflow_complaint (section); | |
22764 | return NULL; | |
22765 | } | |
cf2c3c16 TT |
22766 | break; |
22767 | ||
663c44ac JK |
22768 | case DW_FORM_implicit_const: |
22769 | break; | |
22770 | ||
cf2c3c16 TT |
22771 | default: |
22772 | { | |
cf2c3c16 TT |
22773 | complaint (&symfile_complaints, |
22774 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 22775 | form, get_section_name (section)); |
cf2c3c16 TT |
22776 | return NULL; |
22777 | } | |
2e276125 JB |
22778 | } |
22779 | ||
cf2c3c16 TT |
22780 | return bytes; |
22781 | } | |
757a13d0 | 22782 | |
cf2c3c16 TT |
22783 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
22784 | opcode. Returns an updated pointer to the macro data buffer; or, | |
22785 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 22786 | |
d521ce57 | 22787 | static const gdb_byte * |
cf2c3c16 | 22788 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
22789 | const gdb_byte **opcode_definitions, |
22790 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
22791 | bfd *abfd, |
22792 | unsigned int offset_size, | |
22793 | struct dwarf2_section_info *section) | |
22794 | { | |
22795 | unsigned int bytes_read, i; | |
22796 | unsigned long arg; | |
d521ce57 | 22797 | const gdb_byte *defn; |
2e276125 | 22798 | |
cf2c3c16 | 22799 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 22800 | { |
cf2c3c16 TT |
22801 | complaint (&symfile_complaints, |
22802 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
22803 | opcode); | |
22804 | return NULL; | |
22805 | } | |
2e276125 | 22806 | |
cf2c3c16 TT |
22807 | defn = opcode_definitions[opcode]; |
22808 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
22809 | defn += bytes_read; | |
2e276125 | 22810 | |
cf2c3c16 TT |
22811 | for (i = 0; i < arg; ++i) |
22812 | { | |
aead7601 SM |
22813 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
22814 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 22815 | section); |
cf2c3c16 TT |
22816 | if (mac_ptr == NULL) |
22817 | { | |
22818 | /* skip_form_bytes already issued the complaint. */ | |
22819 | return NULL; | |
22820 | } | |
22821 | } | |
757a13d0 | 22822 | |
cf2c3c16 TT |
22823 | return mac_ptr; |
22824 | } | |
757a13d0 | 22825 | |
cf2c3c16 TT |
22826 | /* A helper function which parses the header of a macro section. |
22827 | If the macro section is the extended (for now called "GNU") type, | |
22828 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
22829 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 22830 | |
d521ce57 TT |
22831 | static const gdb_byte * |
22832 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 22833 | bfd *abfd, |
d521ce57 | 22834 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
22835 | unsigned int *offset_size, |
22836 | int section_is_gnu) | |
22837 | { | |
22838 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 22839 | |
cf2c3c16 TT |
22840 | if (section_is_gnu) |
22841 | { | |
22842 | unsigned int version, flags; | |
757a13d0 | 22843 | |
cf2c3c16 | 22844 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 22845 | if (version != 4 && version != 5) |
cf2c3c16 TT |
22846 | { |
22847 | complaint (&symfile_complaints, | |
22848 | _("unrecognized version `%d' in .debug_macro section"), | |
22849 | version); | |
22850 | return NULL; | |
22851 | } | |
22852 | mac_ptr += 2; | |
757a13d0 | 22853 | |
cf2c3c16 TT |
22854 | flags = read_1_byte (abfd, mac_ptr); |
22855 | ++mac_ptr; | |
22856 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 22857 | |
cf2c3c16 TT |
22858 | if ((flags & 2) != 0) |
22859 | /* We don't need the line table offset. */ | |
22860 | mac_ptr += *offset_size; | |
757a13d0 | 22861 | |
cf2c3c16 TT |
22862 | /* Vendor opcode descriptions. */ |
22863 | if ((flags & 4) != 0) | |
22864 | { | |
22865 | unsigned int i, count; | |
757a13d0 | 22866 | |
cf2c3c16 TT |
22867 | count = read_1_byte (abfd, mac_ptr); |
22868 | ++mac_ptr; | |
22869 | for (i = 0; i < count; ++i) | |
22870 | { | |
22871 | unsigned int opcode, bytes_read; | |
22872 | unsigned long arg; | |
22873 | ||
22874 | opcode = read_1_byte (abfd, mac_ptr); | |
22875 | ++mac_ptr; | |
22876 | opcode_definitions[opcode] = mac_ptr; | |
22877 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22878 | mac_ptr += bytes_read; | |
22879 | mac_ptr += arg; | |
22880 | } | |
757a13d0 | 22881 | } |
cf2c3c16 | 22882 | } |
757a13d0 | 22883 | |
cf2c3c16 TT |
22884 | return mac_ptr; |
22885 | } | |
757a13d0 | 22886 | |
cf2c3c16 | 22887 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 22888 | including DW_MACRO_import. */ |
cf2c3c16 TT |
22889 | |
22890 | static void | |
d521ce57 TT |
22891 | dwarf_decode_macro_bytes (bfd *abfd, |
22892 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 22893 | struct macro_source_file *current_file, |
43f3e411 | 22894 | struct line_header *lh, |
cf2c3c16 | 22895 | struct dwarf2_section_info *section, |
36586728 | 22896 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 22897 | unsigned int offset_size, |
8fc3fc34 | 22898 | htab_t include_hash) |
cf2c3c16 | 22899 | { |
4d663531 | 22900 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22901 | enum dwarf_macro_record_type macinfo_type; |
22902 | int at_commandline; | |
d521ce57 | 22903 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22904 | |
cf2c3c16 TT |
22905 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22906 | &offset_size, section_is_gnu); | |
22907 | if (mac_ptr == NULL) | |
22908 | { | |
22909 | /* We already issued a complaint. */ | |
22910 | return; | |
22911 | } | |
757a13d0 JK |
22912 | |
22913 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22914 | GDB is still reading the definitions from command line. First | |
22915 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22916 | to create CURRENT_FILE for the main source holding also the command line | |
22917 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22918 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22919 | ||
22920 | at_commandline = 1; | |
22921 | ||
22922 | do | |
22923 | { | |
22924 | /* Do we at least have room for a macinfo type byte? */ | |
22925 | if (mac_ptr >= mac_end) | |
22926 | { | |
f664829e | 22927 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22928 | break; |
22929 | } | |
22930 | ||
aead7601 | 22931 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22932 | mac_ptr++; |
22933 | ||
cf2c3c16 TT |
22934 | /* Note that we rely on the fact that the corresponding GNU and |
22935 | DWARF constants are the same. */ | |
757a13d0 JK |
22936 | switch (macinfo_type) |
22937 | { | |
22938 | /* A zero macinfo type indicates the end of the macro | |
22939 | information. */ | |
22940 | case 0: | |
22941 | break; | |
2e276125 | 22942 | |
0af92d60 JK |
22943 | case DW_MACRO_define: |
22944 | case DW_MACRO_undef: | |
22945 | case DW_MACRO_define_strp: | |
22946 | case DW_MACRO_undef_strp: | |
22947 | case DW_MACRO_define_sup: | |
22948 | case DW_MACRO_undef_sup: | |
2e276125 | 22949 | { |
891d2f0b | 22950 | unsigned int bytes_read; |
2e276125 | 22951 | int line; |
d521ce57 | 22952 | const char *body; |
cf2c3c16 | 22953 | int is_define; |
2e276125 | 22954 | |
cf2c3c16 TT |
22955 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22956 | mac_ptr += bytes_read; | |
22957 | ||
0af92d60 JK |
22958 | if (macinfo_type == DW_MACRO_define |
22959 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22960 | { |
22961 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22962 | mac_ptr += bytes_read; | |
22963 | } | |
22964 | else | |
22965 | { | |
22966 | LONGEST str_offset; | |
22967 | ||
22968 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22969 | mac_ptr += offset_size; | |
2e276125 | 22970 | |
0af92d60 JK |
22971 | if (macinfo_type == DW_MACRO_define_sup |
22972 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22973 | || section_is_dwz) |
36586728 TT |
22974 | { |
22975 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22976 | ||
22977 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
22978 | } | |
22979 | else | |
22980 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
22981 | } |
22982 | ||
0af92d60 JK |
22983 | is_define = (macinfo_type == DW_MACRO_define |
22984 | || macinfo_type == DW_MACRO_define_strp | |
22985 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 22986 | if (! current_file) |
757a13d0 JK |
22987 | { |
22988 | /* DWARF violation as no main source is present. */ | |
22989 | complaint (&symfile_complaints, | |
22990 | _("debug info with no main source gives macro %s " | |
22991 | "on line %d: %s"), | |
cf2c3c16 TT |
22992 | is_define ? _("definition") : _("undefinition"), |
22993 | line, body); | |
757a13d0 JK |
22994 | break; |
22995 | } | |
3e43a32a MS |
22996 | if ((line == 0 && !at_commandline) |
22997 | || (line != 0 && at_commandline)) | |
4d3c2250 | 22998 | complaint (&symfile_complaints, |
757a13d0 JK |
22999 | _("debug info gives %s macro %s with %s line %d: %s"), |
23000 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 23001 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
23002 | line == 0 ? _("zero") : _("non-zero"), line, body); |
23003 | ||
cf2c3c16 | 23004 | if (is_define) |
757a13d0 | 23005 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
23006 | else |
23007 | { | |
0af92d60 JK |
23008 | gdb_assert (macinfo_type == DW_MACRO_undef |
23009 | || macinfo_type == DW_MACRO_undef_strp | |
23010 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
23011 | macro_undef (current_file, line, body); |
23012 | } | |
2e276125 JB |
23013 | } |
23014 | break; | |
23015 | ||
0af92d60 | 23016 | case DW_MACRO_start_file: |
2e276125 | 23017 | { |
891d2f0b | 23018 | unsigned int bytes_read; |
2e276125 JB |
23019 | int line, file; |
23020 | ||
23021 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23022 | mac_ptr += bytes_read; | |
23023 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23024 | mac_ptr += bytes_read; | |
23025 | ||
3e43a32a MS |
23026 | if ((line == 0 && !at_commandline) |
23027 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
23028 | complaint (&symfile_complaints, |
23029 | _("debug info gives source %d included " | |
23030 | "from %s at %s line %d"), | |
23031 | file, at_commandline ? _("command-line") : _("file"), | |
23032 | line == 0 ? _("zero") : _("non-zero"), line); | |
23033 | ||
23034 | if (at_commandline) | |
23035 | { | |
0af92d60 | 23036 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 23037 | pass one. */ |
757a13d0 JK |
23038 | at_commandline = 0; |
23039 | } | |
23040 | else | |
43f3e411 | 23041 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
23042 | } |
23043 | break; | |
23044 | ||
0af92d60 | 23045 | case DW_MACRO_end_file: |
2e276125 | 23046 | if (! current_file) |
4d3c2250 | 23047 | complaint (&symfile_complaints, |
3e43a32a MS |
23048 | _("macro debug info has an unmatched " |
23049 | "`close_file' directive")); | |
2e276125 JB |
23050 | else |
23051 | { | |
23052 | current_file = current_file->included_by; | |
23053 | if (! current_file) | |
23054 | { | |
cf2c3c16 | 23055 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
23056 | |
23057 | /* GCC circa March 2002 doesn't produce the zero | |
23058 | type byte marking the end of the compilation | |
23059 | unit. Complain if it's not there, but exit no | |
23060 | matter what. */ | |
23061 | ||
23062 | /* Do we at least have room for a macinfo type byte? */ | |
23063 | if (mac_ptr >= mac_end) | |
23064 | { | |
f664829e | 23065 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
23066 | return; |
23067 | } | |
23068 | ||
23069 | /* We don't increment mac_ptr here, so this is just | |
23070 | a look-ahead. */ | |
aead7601 SM |
23071 | next_type |
23072 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
23073 | mac_ptr); | |
2e276125 | 23074 | if (next_type != 0) |
4d3c2250 | 23075 | complaint (&symfile_complaints, |
3e43a32a MS |
23076 | _("no terminating 0-type entry for " |
23077 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
23078 | |
23079 | return; | |
23080 | } | |
23081 | } | |
23082 | break; | |
23083 | ||
0af92d60 JK |
23084 | case DW_MACRO_import: |
23085 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
23086 | { |
23087 | LONGEST offset; | |
8fc3fc34 | 23088 | void **slot; |
a036ba48 TT |
23089 | bfd *include_bfd = abfd; |
23090 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 23091 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 23092 | int is_dwz = section_is_dwz; |
d521ce57 | 23093 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
23094 | |
23095 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
23096 | mac_ptr += offset_size; | |
23097 | ||
0af92d60 | 23098 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
23099 | { |
23100 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
23101 | ||
4d663531 | 23102 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 23103 | |
a036ba48 | 23104 | include_section = &dwz->macro; |
a32a8923 | 23105 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
23106 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
23107 | is_dwz = 1; | |
23108 | } | |
23109 | ||
23110 | new_mac_ptr = include_section->buffer + offset; | |
23111 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
23112 | ||
8fc3fc34 TT |
23113 | if (*slot != NULL) |
23114 | { | |
23115 | /* This has actually happened; see | |
23116 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
23117 | complaint (&symfile_complaints, | |
0af92d60 | 23118 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
23119 | ".debug_macro section")); |
23120 | } | |
23121 | else | |
23122 | { | |
d521ce57 | 23123 | *slot = (void *) new_mac_ptr; |
36586728 | 23124 | |
a036ba48 | 23125 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 23126 | include_mac_end, current_file, lh, |
36586728 | 23127 | section, section_is_gnu, is_dwz, |
4d663531 | 23128 | offset_size, include_hash); |
8fc3fc34 | 23129 | |
d521ce57 | 23130 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 23131 | } |
cf2c3c16 TT |
23132 | } |
23133 | break; | |
23134 | ||
2e276125 | 23135 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
23136 | if (!section_is_gnu) |
23137 | { | |
23138 | unsigned int bytes_read; | |
2e276125 | 23139 | |
ac298888 TT |
23140 | /* This reads the constant, but since we don't recognize |
23141 | any vendor extensions, we ignore it. */ | |
23142 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
23143 | mac_ptr += bytes_read; |
23144 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23145 | mac_ptr += bytes_read; | |
2e276125 | 23146 | |
cf2c3c16 TT |
23147 | /* We don't recognize any vendor extensions. */ |
23148 | break; | |
23149 | } | |
23150 | /* FALLTHROUGH */ | |
23151 | ||
23152 | default: | |
23153 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23154 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23155 | section); |
23156 | if (mac_ptr == NULL) | |
23157 | return; | |
23158 | break; | |
2e276125 | 23159 | } |
757a13d0 | 23160 | } while (macinfo_type != 0); |
2e276125 | 23161 | } |
8e19ed76 | 23162 | |
cf2c3c16 | 23163 | static void |
09262596 | 23164 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 23165 | int section_is_gnu) |
cf2c3c16 | 23166 | { |
bb5ed363 | 23167 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
23168 | struct line_header *lh = cu->line_header; |
23169 | bfd *abfd; | |
d521ce57 | 23170 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
23171 | struct macro_source_file *current_file = 0; |
23172 | enum dwarf_macro_record_type macinfo_type; | |
23173 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 23174 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 23175 | void **slot; |
09262596 DE |
23176 | struct dwarf2_section_info *section; |
23177 | const char *section_name; | |
23178 | ||
23179 | if (cu->dwo_unit != NULL) | |
23180 | { | |
23181 | if (section_is_gnu) | |
23182 | { | |
23183 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
23184 | section_name = ".debug_macro.dwo"; | |
23185 | } | |
23186 | else | |
23187 | { | |
23188 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
23189 | section_name = ".debug_macinfo.dwo"; | |
23190 | } | |
23191 | } | |
23192 | else | |
23193 | { | |
23194 | if (section_is_gnu) | |
23195 | { | |
23196 | section = &dwarf2_per_objfile->macro; | |
23197 | section_name = ".debug_macro"; | |
23198 | } | |
23199 | else | |
23200 | { | |
23201 | section = &dwarf2_per_objfile->macinfo; | |
23202 | section_name = ".debug_macinfo"; | |
23203 | } | |
23204 | } | |
cf2c3c16 | 23205 | |
bb5ed363 | 23206 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
23207 | if (section->buffer == NULL) |
23208 | { | |
fceca515 | 23209 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
23210 | return; |
23211 | } | |
a32a8923 | 23212 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
23213 | |
23214 | /* First pass: Find the name of the base filename. | |
23215 | This filename is needed in order to process all macros whose definition | |
23216 | (or undefinition) comes from the command line. These macros are defined | |
23217 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
23218 | associated to the base file. | |
23219 | ||
23220 | To determine the base file name, we scan the macro definitions until we | |
23221 | reach the first DW_MACINFO_start_file entry. We then initialize | |
23222 | CURRENT_FILE accordingly so that any macro definition found before the | |
23223 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
23224 | ||
23225 | mac_ptr = section->buffer + offset; | |
23226 | mac_end = section->buffer + section->size; | |
23227 | ||
23228 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
23229 | &offset_size, section_is_gnu); | |
23230 | if (mac_ptr == NULL) | |
23231 | { | |
23232 | /* We already issued a complaint. */ | |
23233 | return; | |
23234 | } | |
23235 | ||
23236 | do | |
23237 | { | |
23238 | /* Do we at least have room for a macinfo type byte? */ | |
23239 | if (mac_ptr >= mac_end) | |
23240 | { | |
23241 | /* Complaint is printed during the second pass as GDB will probably | |
23242 | stop the first pass earlier upon finding | |
23243 | DW_MACINFO_start_file. */ | |
23244 | break; | |
23245 | } | |
23246 | ||
aead7601 | 23247 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
23248 | mac_ptr++; |
23249 | ||
23250 | /* Note that we rely on the fact that the corresponding GNU and | |
23251 | DWARF constants are the same. */ | |
23252 | switch (macinfo_type) | |
23253 | { | |
23254 | /* A zero macinfo type indicates the end of the macro | |
23255 | information. */ | |
23256 | case 0: | |
23257 | break; | |
23258 | ||
0af92d60 JK |
23259 | case DW_MACRO_define: |
23260 | case DW_MACRO_undef: | |
cf2c3c16 TT |
23261 | /* Only skip the data by MAC_PTR. */ |
23262 | { | |
23263 | unsigned int bytes_read; | |
23264 | ||
23265 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23266 | mac_ptr += bytes_read; | |
23267 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23268 | mac_ptr += bytes_read; | |
23269 | } | |
23270 | break; | |
23271 | ||
0af92d60 | 23272 | case DW_MACRO_start_file: |
cf2c3c16 TT |
23273 | { |
23274 | unsigned int bytes_read; | |
23275 | int line, file; | |
23276 | ||
23277 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23278 | mac_ptr += bytes_read; | |
23279 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23280 | mac_ptr += bytes_read; | |
23281 | ||
43f3e411 | 23282 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
23283 | } |
23284 | break; | |
23285 | ||
0af92d60 | 23286 | case DW_MACRO_end_file: |
cf2c3c16 TT |
23287 | /* No data to skip by MAC_PTR. */ |
23288 | break; | |
23289 | ||
0af92d60 JK |
23290 | case DW_MACRO_define_strp: |
23291 | case DW_MACRO_undef_strp: | |
23292 | case DW_MACRO_define_sup: | |
23293 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
23294 | { |
23295 | unsigned int bytes_read; | |
23296 | ||
23297 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23298 | mac_ptr += bytes_read; | |
23299 | mac_ptr += offset_size; | |
23300 | } | |
23301 | break; | |
23302 | ||
0af92d60 JK |
23303 | case DW_MACRO_import: |
23304 | case DW_MACRO_import_sup: | |
cf2c3c16 | 23305 | /* Note that, according to the spec, a transparent include |
0af92d60 | 23306 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
23307 | skip this opcode. */ |
23308 | mac_ptr += offset_size; | |
23309 | break; | |
23310 | ||
23311 | case DW_MACINFO_vendor_ext: | |
23312 | /* Only skip the data by MAC_PTR. */ | |
23313 | if (!section_is_gnu) | |
23314 | { | |
23315 | unsigned int bytes_read; | |
23316 | ||
23317 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23318 | mac_ptr += bytes_read; | |
23319 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23320 | mac_ptr += bytes_read; | |
23321 | } | |
23322 | /* FALLTHROUGH */ | |
23323 | ||
23324 | default: | |
23325 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23326 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23327 | section); |
23328 | if (mac_ptr == NULL) | |
23329 | return; | |
23330 | break; | |
23331 | } | |
23332 | } while (macinfo_type != 0 && current_file == NULL); | |
23333 | ||
23334 | /* Second pass: Process all entries. | |
23335 | ||
23336 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
23337 | command-line macro definitions/undefinitions. This flag is unset when we | |
23338 | reach the first DW_MACINFO_start_file entry. */ | |
23339 | ||
fc4007c9 TT |
23340 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
23341 | htab_eq_pointer, | |
23342 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 23343 | mac_ptr = section->buffer + offset; |
fc4007c9 | 23344 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 23345 | *slot = (void *) mac_ptr; |
8fc3fc34 | 23346 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 23347 | current_file, lh, section, |
fc4007c9 TT |
23348 | section_is_gnu, 0, offset_size, |
23349 | include_hash.get ()); | |
cf2c3c16 TT |
23350 | } |
23351 | ||
8e19ed76 | 23352 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 23353 | if so return true else false. */ |
380bca97 | 23354 | |
8e19ed76 | 23355 | static int |
6e5a29e1 | 23356 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
23357 | { |
23358 | return (attr == NULL ? 0 : | |
23359 | attr->form == DW_FORM_block1 | |
23360 | || attr->form == DW_FORM_block2 | |
23361 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
23362 | || attr->form == DW_FORM_block |
23363 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 23364 | } |
4c2df51b | 23365 | |
c6a0999f JB |
23366 | /* Return non-zero if ATTR's value is a section offset --- classes |
23367 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
23368 | You may use DW_UNSND (attr) to retrieve such offsets. | |
23369 | ||
23370 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
23371 | may have a value that belongs to more than one of these classes; it | |
23372 | would be ambiguous if we did, because we use the same forms for all | |
23373 | of them. */ | |
380bca97 | 23374 | |
3690dd37 | 23375 | static int |
6e5a29e1 | 23376 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
23377 | { |
23378 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
23379 | || attr->form == DW_FORM_data8 |
23380 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
23381 | } |
23382 | ||
3690dd37 JB |
23383 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
23384 | zero otherwise. When this function returns true, you can apply | |
23385 | dwarf2_get_attr_constant_value to it. | |
23386 | ||
23387 | However, note that for some attributes you must check | |
23388 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
23389 | and DW_FORM_data8 are members of both the constant class, and of | |
23390 | the classes that contain offsets into other debug sections | |
23391 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
23392 | that, if an attribute's can be either a constant or one of the | |
23393 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
23394 | taken as section offsets, not constants. |
23395 | ||
23396 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
23397 | cannot handle that. */ | |
380bca97 | 23398 | |
3690dd37 | 23399 | static int |
6e5a29e1 | 23400 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
23401 | { |
23402 | switch (attr->form) | |
23403 | { | |
23404 | case DW_FORM_sdata: | |
23405 | case DW_FORM_udata: | |
23406 | case DW_FORM_data1: | |
23407 | case DW_FORM_data2: | |
23408 | case DW_FORM_data4: | |
23409 | case DW_FORM_data8: | |
663c44ac | 23410 | case DW_FORM_implicit_const: |
3690dd37 JB |
23411 | return 1; |
23412 | default: | |
23413 | return 0; | |
23414 | } | |
23415 | } | |
23416 | ||
7771576e SA |
23417 | |
23418 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
23419 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
23420 | ||
23421 | static int | |
6e5a29e1 | 23422 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
23423 | { |
23424 | switch (attr->form) | |
23425 | { | |
23426 | case DW_FORM_ref_addr: | |
23427 | case DW_FORM_ref1: | |
23428 | case DW_FORM_ref2: | |
23429 | case DW_FORM_ref4: | |
23430 | case DW_FORM_ref8: | |
23431 | case DW_FORM_ref_udata: | |
23432 | case DW_FORM_GNU_ref_alt: | |
23433 | return 1; | |
23434 | default: | |
23435 | return 0; | |
23436 | } | |
23437 | } | |
23438 | ||
3019eac3 DE |
23439 | /* Return the .debug_loc section to use for CU. |
23440 | For DWO files use .debug_loc.dwo. */ | |
23441 | ||
23442 | static struct dwarf2_section_info * | |
23443 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23444 | { | |
23445 | if (cu->dwo_unit) | |
43988095 JK |
23446 | { |
23447 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
23448 | ||
23449 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
23450 | } | |
23451 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23452 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23453 | } |
23454 | ||
8cf6f0b1 TT |
23455 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23456 | ||
23457 | static void | |
23458 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23459 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23460 | const struct attribute *attr) |
8cf6f0b1 | 23461 | { |
3019eac3 DE |
23462 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23463 | ||
23464 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
23465 | |
23466 | baton->per_cu = cu->per_cu; | |
23467 | gdb_assert (baton->per_cu); | |
23468 | /* We don't know how long the location list is, but make sure we | |
23469 | don't run off the edge of the section. */ | |
3019eac3 DE |
23470 | baton->size = section->size - DW_UNSND (attr); |
23471 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23472 | baton->base_address = cu->base_address; |
f664829e | 23473 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23474 | } |
23475 | ||
4c2df51b | 23476 | static void |
ff39bb5e | 23477 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23478 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23479 | { |
bb5ed363 | 23480 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23481 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23482 | |
3690dd37 | 23483 | if (attr_form_is_section_offset (attr) |
3019eac3 | 23484 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23485 | the section. If so, fall through to the complaint in the |
23486 | other branch. */ | |
3019eac3 | 23487 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 23488 | { |
0d53c4c4 | 23489 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23490 | |
8d749320 | 23491 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23492 | |
8cf6f0b1 | 23493 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23494 | |
d00adf39 | 23495 | if (cu->base_known == 0) |
0d53c4c4 | 23496 | complaint (&symfile_complaints, |
3e43a32a MS |
23497 | _("Location list used without " |
23498 | "specifying the CU base address.")); | |
4c2df51b | 23499 | |
f1e6e072 TT |
23500 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23501 | ? dwarf2_loclist_block_index | |
23502 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
23503 | SYMBOL_LOCATION_BATON (sym) = baton; |
23504 | } | |
23505 | else | |
23506 | { | |
23507 | struct dwarf2_locexpr_baton *baton; | |
23508 | ||
8d749320 | 23509 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
23510 | baton->per_cu = cu->per_cu; |
23511 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
23512 | |
23513 | if (attr_form_is_block (attr)) | |
23514 | { | |
23515 | /* Note that we're just copying the block's data pointer | |
23516 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
23517 | info_buffer for SYM's objfile; right now we never release |
23518 | that buffer, but when we do clean up properly this may | |
23519 | need to change. */ | |
0d53c4c4 DJ |
23520 | baton->size = DW_BLOCK (attr)->size; |
23521 | baton->data = DW_BLOCK (attr)->data; | |
23522 | } | |
23523 | else | |
23524 | { | |
23525 | dwarf2_invalid_attrib_class_complaint ("location description", | |
23526 | SYMBOL_NATURAL_NAME (sym)); | |
23527 | baton->size = 0; | |
0d53c4c4 | 23528 | } |
6e70227d | 23529 | |
f1e6e072 TT |
23530 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23531 | ? dwarf2_locexpr_block_index | |
23532 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
23533 | SYMBOL_LOCATION_BATON (sym) = baton; |
23534 | } | |
4c2df51b | 23535 | } |
6502dd73 | 23536 | |
9aa1f1e3 TT |
23537 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
23538 | came from a separate debuginfo file, then the master objfile is | |
23539 | returned. */ | |
ae0d2f24 UW |
23540 | |
23541 | struct objfile * | |
23542 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
23543 | { | |
9291a0cd | 23544 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
23545 | |
23546 | /* Return the master objfile, so that we can report and look up the | |
23547 | correct file containing this variable. */ | |
23548 | if (objfile->separate_debug_objfile_backlink) | |
23549 | objfile = objfile->separate_debug_objfile_backlink; | |
23550 | ||
23551 | return objfile; | |
23552 | } | |
23553 | ||
96408a79 SA |
23554 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
23555 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
23556 | CU_HEADERP first. */ | |
23557 | ||
23558 | static const struct comp_unit_head * | |
23559 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
23560 | struct dwarf2_per_cu_data *per_cu) | |
23561 | { | |
d521ce57 | 23562 | const gdb_byte *info_ptr; |
96408a79 SA |
23563 | |
23564 | if (per_cu->cu) | |
23565 | return &per_cu->cu->header; | |
23566 | ||
9c541725 | 23567 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
23568 | |
23569 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
23570 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
23571 | rcuh_kind::COMPILE); | |
96408a79 SA |
23572 | |
23573 | return cu_headerp; | |
23574 | } | |
23575 | ||
ae0d2f24 UW |
23576 | /* Return the address size given in the compilation unit header for CU. */ |
23577 | ||
98714339 | 23578 | int |
ae0d2f24 UW |
23579 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
23580 | { | |
96408a79 SA |
23581 | struct comp_unit_head cu_header_local; |
23582 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 23583 | |
96408a79 SA |
23584 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23585 | ||
23586 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
23587 | } |
23588 | ||
9eae7c52 TT |
23589 | /* Return the offset size given in the compilation unit header for CU. */ |
23590 | ||
23591 | int | |
23592 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
23593 | { | |
96408a79 SA |
23594 | struct comp_unit_head cu_header_local; |
23595 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 23596 | |
96408a79 SA |
23597 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23598 | ||
23599 | return cu_headerp->offset_size; | |
23600 | } | |
23601 | ||
23602 | /* See its dwarf2loc.h declaration. */ | |
23603 | ||
23604 | int | |
23605 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
23606 | { | |
23607 | struct comp_unit_head cu_header_local; | |
23608 | const struct comp_unit_head *cu_headerp; | |
23609 | ||
23610 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
23611 | ||
23612 | if (cu_headerp->version == 2) | |
23613 | return cu_headerp->addr_size; | |
23614 | else | |
23615 | return cu_headerp->offset_size; | |
181cebd4 JK |
23616 | } |
23617 | ||
9aa1f1e3 TT |
23618 | /* Return the text offset of the CU. The returned offset comes from |
23619 | this CU's objfile. If this objfile came from a separate debuginfo | |
23620 | file, then the offset may be different from the corresponding | |
23621 | offset in the parent objfile. */ | |
23622 | ||
23623 | CORE_ADDR | |
23624 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
23625 | { | |
bb3fa9d0 | 23626 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
23627 | |
23628 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23629 | } | |
23630 | ||
43988095 JK |
23631 | /* Return DWARF version number of PER_CU. */ |
23632 | ||
23633 | short | |
23634 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
23635 | { | |
23636 | return per_cu->dwarf_version; | |
23637 | } | |
23638 | ||
348e048f DE |
23639 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
23640 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
23641 | |
23642 | static struct dwarf2_per_cu_data * | |
9c541725 | 23643 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 23644 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
23645 | struct objfile *objfile) |
23646 | { | |
23647 | struct dwarf2_per_cu_data *this_cu; | |
23648 | int low, high; | |
36586728 | 23649 | const sect_offset *cu_off; |
ae038cb0 | 23650 | |
ae038cb0 DJ |
23651 | low = 0; |
23652 | high = dwarf2_per_objfile->n_comp_units - 1; | |
23653 | while (high > low) | |
23654 | { | |
36586728 | 23655 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 23656 | int mid = low + (high - low) / 2; |
9a619af0 | 23657 | |
36586728 | 23658 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 23659 | cu_off = &mid_cu->sect_off; |
36586728 | 23660 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 23661 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
23662 | high = mid; |
23663 | else | |
23664 | low = mid + 1; | |
23665 | } | |
23666 | gdb_assert (low == high); | |
36586728 | 23667 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
23668 | cu_off = &this_cu->sect_off; |
23669 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 23670 | { |
36586728 | 23671 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 23672 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
23673 | "offset 0x%x [in module %s]"), |
23674 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 23675 | |
9c541725 PA |
23676 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
23677 | <= sect_off); | |
ae038cb0 DJ |
23678 | return dwarf2_per_objfile->all_comp_units[low-1]; |
23679 | } | |
23680 | else | |
23681 | { | |
23682 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
23683 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
23684 | && sect_off >= this_cu->sect_off + this_cu->length) |
23685 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
23686 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
23687 | return this_cu; |
23688 | } | |
23689 | } | |
23690 | ||
23745b47 | 23691 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 23692 | |
9816fde3 | 23693 | static void |
23745b47 | 23694 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 23695 | { |
9816fde3 | 23696 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
23697 | per_cu->cu = cu; |
23698 | cu->per_cu = per_cu; | |
23699 | cu->objfile = per_cu->objfile; | |
93311388 | 23700 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
23701 | } |
23702 | ||
23703 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
23704 | ||
23705 | static void | |
95554aad TT |
23706 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
23707 | enum language pretend_language) | |
9816fde3 JK |
23708 | { |
23709 | struct attribute *attr; | |
23710 | ||
23711 | /* Set the language we're debugging. */ | |
23712 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
23713 | if (attr) | |
23714 | set_cu_language (DW_UNSND (attr), cu); | |
23715 | else | |
9cded63f | 23716 | { |
95554aad | 23717 | cu->language = pretend_language; |
9cded63f TT |
23718 | cu->language_defn = language_def (cu->language); |
23719 | } | |
dee91e82 | 23720 | |
7d45c7c3 | 23721 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
23722 | } |
23723 | ||
ae038cb0 DJ |
23724 | /* Release one cached compilation unit, CU. We unlink it from the tree |
23725 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
23726 | the caller is responsible for that. |
23727 | NOTE: DATA is a void * because this function is also used as a | |
23728 | cleanup routine. */ | |
ae038cb0 DJ |
23729 | |
23730 | static void | |
68dc6402 | 23731 | free_heap_comp_unit (void *data) |
ae038cb0 | 23732 | { |
9a3c8263 | 23733 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 23734 | |
23745b47 DE |
23735 | gdb_assert (cu->per_cu != NULL); |
23736 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
23737 | cu->per_cu = NULL; |
23738 | ||
23739 | obstack_free (&cu->comp_unit_obstack, NULL); | |
23740 | ||
23741 | xfree (cu); | |
23742 | } | |
23743 | ||
72bf9492 | 23744 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 23745 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 23746 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
23747 | |
23748 | static void | |
23749 | free_stack_comp_unit (void *data) | |
23750 | { | |
9a3c8263 | 23751 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 23752 | |
23745b47 DE |
23753 | gdb_assert (cu->per_cu != NULL); |
23754 | cu->per_cu->cu = NULL; | |
23755 | cu->per_cu = NULL; | |
23756 | ||
72bf9492 DJ |
23757 | obstack_free (&cu->comp_unit_obstack, NULL); |
23758 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
23759 | } |
23760 | ||
23761 | /* Free all cached compilation units. */ | |
23762 | ||
23763 | static void | |
23764 | free_cached_comp_units (void *data) | |
23765 | { | |
330cdd98 | 23766 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
23767 | } |
23768 | ||
23769 | /* Increase the age counter on each cached compilation unit, and free | |
23770 | any that are too old. */ | |
23771 | ||
23772 | static void | |
23773 | age_cached_comp_units (void) | |
23774 | { | |
23775 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23776 | ||
23777 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
23778 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23779 | while (per_cu != NULL) | |
23780 | { | |
23781 | per_cu->cu->last_used ++; | |
b4f54984 | 23782 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
23783 | dwarf2_mark (per_cu->cu); |
23784 | per_cu = per_cu->cu->read_in_chain; | |
23785 | } | |
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 | ||
23795 | if (!per_cu->cu->mark) | |
23796 | { | |
68dc6402 | 23797 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
23798 | *last_chain = next_cu; |
23799 | } | |
23800 | else | |
23801 | last_chain = &per_cu->cu->read_in_chain; | |
23802 | ||
23803 | per_cu = next_cu; | |
23804 | } | |
23805 | } | |
23806 | ||
23807 | /* Remove a single compilation unit from the cache. */ | |
23808 | ||
23809 | static void | |
dee91e82 | 23810 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
23811 | { |
23812 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23813 | ||
23814 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23815 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23816 | while (per_cu != NULL) | |
23817 | { | |
23818 | struct dwarf2_per_cu_data *next_cu; | |
23819 | ||
23820 | next_cu = per_cu->cu->read_in_chain; | |
23821 | ||
dee91e82 | 23822 | if (per_cu == target_per_cu) |
ae038cb0 | 23823 | { |
68dc6402 | 23824 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 23825 | per_cu->cu = NULL; |
ae038cb0 DJ |
23826 | *last_chain = next_cu; |
23827 | break; | |
23828 | } | |
23829 | else | |
23830 | last_chain = &per_cu->cu->read_in_chain; | |
23831 | ||
23832 | per_cu = next_cu; | |
23833 | } | |
23834 | } | |
23835 | ||
fe3e1990 DJ |
23836 | /* Release all extra memory associated with OBJFILE. */ |
23837 | ||
23838 | void | |
23839 | dwarf2_free_objfile (struct objfile *objfile) | |
23840 | { | |
9a3c8263 SM |
23841 | dwarf2_per_objfile |
23842 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23843 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
23844 | |
23845 | if (dwarf2_per_objfile == NULL) | |
23846 | return; | |
23847 | ||
330cdd98 | 23848 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
23849 | } |
23850 | ||
dee91e82 DE |
23851 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23852 | We store these in a hash table separate from the DIEs, and preserve them | |
23853 | when the DIEs are flushed out of cache. | |
23854 | ||
23855 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23856 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23857 | or the type may come from a DWO file. Furthermore, while it's more logical |
23858 | to use per_cu->section+offset, with Fission the section with the data is in | |
23859 | the DWO file but we don't know that section at the point we need it. | |
23860 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23861 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23862 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23863 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23864 | |
dee91e82 | 23865 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23866 | { |
dee91e82 | 23867 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23868 | sect_offset sect_off; |
1c379e20 DJ |
23869 | struct type *type; |
23870 | }; | |
23871 | ||
dee91e82 | 23872 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23873 | |
23874 | static hashval_t | |
dee91e82 | 23875 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23876 | { |
9a3c8263 SM |
23877 | const struct dwarf2_per_cu_offset_and_type *ofs |
23878 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23879 | |
9c541725 | 23880 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23881 | } |
23882 | ||
dee91e82 | 23883 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23884 | |
23885 | static int | |
dee91e82 | 23886 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23887 | { |
9a3c8263 SM |
23888 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23889 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23890 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23891 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23892 | |
dee91e82 | 23893 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23894 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23895 | } |
23896 | ||
23897 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23898 | table if necessary. For convenience, return TYPE. |
23899 | ||
23900 | The DIEs reading must have careful ordering to: | |
23901 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23902 | reading current DIE. | |
23903 | * Not trying to dereference contents of still incompletely read in types | |
23904 | while reading in other DIEs. | |
23905 | * Enable referencing still incompletely read in types just by a pointer to | |
23906 | the type without accessing its fields. | |
23907 | ||
23908 | Therefore caller should follow these rules: | |
23909 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23910 | before building the type and calling set_die_type. | |
e71ec853 | 23911 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23912 | possible before fetching more types to complete the current type. |
23913 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23914 | |
f792889a | 23915 | static struct type * |
1c379e20 DJ |
23916 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23917 | { | |
dee91e82 | 23918 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23919 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23920 | struct attribute *attr; |
23921 | struct dynamic_prop prop; | |
1c379e20 | 23922 | |
b4ba55a1 JB |
23923 | /* For Ada types, make sure that the gnat-specific data is always |
23924 | initialized (if not already set). There are a few types where | |
23925 | we should not be doing so, because the type-specific area is | |
23926 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23927 | where the type-specific area is used to store the floatformat). | |
23928 | But this is not a problem, because the gnat-specific information | |
23929 | is actually not needed for these types. */ | |
23930 | if (need_gnat_info (cu) | |
23931 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23932 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23933 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23934 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23935 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23936 | && !HAVE_GNAT_AUX_INFO (type)) |
23937 | INIT_GNAT_SPECIFIC (type); | |
23938 | ||
3f2f83dd KB |
23939 | /* Read DW_AT_allocated and set in type. */ |
23940 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23941 | if (attr_form_is_block (attr)) | |
23942 | { | |
23943 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23944 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23945 | } | |
23946 | else if (attr != NULL) | |
23947 | { | |
23948 | complaint (&symfile_complaints, | |
9c541725 PA |
23949 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23950 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23951 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23952 | } |
23953 | ||
23954 | /* Read DW_AT_associated and set in type. */ | |
23955 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23956 | if (attr_form_is_block (attr)) | |
23957 | { | |
23958 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23959 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23960 | } | |
23961 | else if (attr != NULL) | |
23962 | { | |
23963 | complaint (&symfile_complaints, | |
9c541725 PA |
23964 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23965 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23966 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23967 | } |
23968 | ||
3cdcd0ce JB |
23969 | /* Read DW_AT_data_location and set in type. */ |
23970 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23971 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23972 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23973 | |
dee91e82 | 23974 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23975 | { |
dee91e82 DE |
23976 | dwarf2_per_objfile->die_type_hash = |
23977 | htab_create_alloc_ex (127, | |
23978 | per_cu_offset_and_type_hash, | |
23979 | per_cu_offset_and_type_eq, | |
23980 | NULL, | |
23981 | &objfile->objfile_obstack, | |
23982 | hashtab_obstack_allocate, | |
23983 | dummy_obstack_deallocate); | |
f792889a | 23984 | } |
1c379e20 | 23985 | |
dee91e82 | 23986 | ofs.per_cu = cu->per_cu; |
9c541725 | 23987 | ofs.sect_off = die->sect_off; |
1c379e20 | 23988 | ofs.type = type; |
dee91e82 DE |
23989 | slot = (struct dwarf2_per_cu_offset_and_type **) |
23990 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
23991 | if (*slot) |
23992 | complaint (&symfile_complaints, | |
23993 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 23994 | to_underlying (die->sect_off)); |
8d749320 SM |
23995 | *slot = XOBNEW (&objfile->objfile_obstack, |
23996 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23997 | **slot = ofs; |
f792889a | 23998 | return type; |
1c379e20 DJ |
23999 | } |
24000 | ||
9c541725 | 24001 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 24002 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
24003 | |
24004 | static struct type * | |
9c541725 | 24005 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 24006 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 24007 | { |
dee91e82 | 24008 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 24009 | |
dee91e82 | 24010 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 24011 | return NULL; |
1c379e20 | 24012 | |
dee91e82 | 24013 | ofs.per_cu = per_cu; |
9c541725 | 24014 | ofs.sect_off = sect_off; |
9a3c8263 SM |
24015 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
24016 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
24017 | if (slot) |
24018 | return slot->type; | |
24019 | else | |
24020 | return NULL; | |
24021 | } | |
24022 | ||
02142a6c | 24023 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
24024 | or return NULL if DIE does not have a saved type. */ |
24025 | ||
24026 | static struct type * | |
24027 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
24028 | { | |
9c541725 | 24029 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
24030 | } |
24031 | ||
10b3939b DJ |
24032 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
24033 | ||
24034 | static void | |
24035 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
24036 | struct dwarf2_per_cu_data *ref_per_cu) | |
24037 | { | |
24038 | void **slot; | |
24039 | ||
24040 | if (cu->dependencies == NULL) | |
24041 | cu->dependencies | |
24042 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
24043 | NULL, &cu->comp_unit_obstack, | |
24044 | hashtab_obstack_allocate, | |
24045 | dummy_obstack_deallocate); | |
24046 | ||
24047 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
24048 | if (*slot == NULL) | |
24049 | *slot = ref_per_cu; | |
24050 | } | |
1c379e20 | 24051 | |
f504f079 DE |
24052 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
24053 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
24054 | cache that we must keep because we are keeping CU. */ |
24055 | ||
10b3939b DJ |
24056 | static int |
24057 | dwarf2_mark_helper (void **slot, void *data) | |
24058 | { | |
24059 | struct dwarf2_per_cu_data *per_cu; | |
24060 | ||
24061 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
24062 | |
24063 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
24064 | reading of the chain. As such dependencies remain valid it is not much | |
24065 | useful to track and undo them during QUIT cleanups. */ | |
24066 | if (per_cu->cu == NULL) | |
24067 | return 1; | |
24068 | ||
10b3939b DJ |
24069 | if (per_cu->cu->mark) |
24070 | return 1; | |
24071 | per_cu->cu->mark = 1; | |
24072 | ||
24073 | if (per_cu->cu->dependencies != NULL) | |
24074 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
24075 | ||
24076 | return 1; | |
24077 | } | |
24078 | ||
f504f079 DE |
24079 | /* Set the mark field in CU and in every other compilation unit in the |
24080 | cache that we must keep because we are keeping CU. */ | |
24081 | ||
ae038cb0 DJ |
24082 | static void |
24083 | dwarf2_mark (struct dwarf2_cu *cu) | |
24084 | { | |
24085 | if (cu->mark) | |
24086 | return; | |
24087 | cu->mark = 1; | |
10b3939b DJ |
24088 | if (cu->dependencies != NULL) |
24089 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
24090 | } |
24091 | ||
24092 | static void | |
24093 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
24094 | { | |
24095 | while (per_cu) | |
24096 | { | |
24097 | per_cu->cu->mark = 0; | |
24098 | per_cu = per_cu->cu->read_in_chain; | |
24099 | } | |
72bf9492 DJ |
24100 | } |
24101 | ||
72bf9492 DJ |
24102 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
24103 | is its offset in .debug_info for this objfile. */ | |
24104 | ||
24105 | static hashval_t | |
24106 | partial_die_hash (const void *item) | |
24107 | { | |
9a3c8263 SM |
24108 | const struct partial_die_info *part_die |
24109 | = (const struct partial_die_info *) item; | |
9a619af0 | 24110 | |
9c541725 | 24111 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
24112 | } |
24113 | ||
24114 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
24115 | are equal if they have the same offset. */ | |
24116 | ||
24117 | static int | |
24118 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
24119 | { | |
9a3c8263 SM |
24120 | const struct partial_die_info *part_die_lhs |
24121 | = (const struct partial_die_info *) item_lhs; | |
24122 | const struct partial_die_info *part_die_rhs | |
24123 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 24124 | |
9c541725 | 24125 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
24126 | } |
24127 | ||
b4f54984 DE |
24128 | static struct cmd_list_element *set_dwarf_cmdlist; |
24129 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
24130 | |
24131 | static void | |
981a3fb3 | 24132 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 24133 | { |
b4f54984 | 24134 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 24135 | gdb_stdout); |
ae038cb0 DJ |
24136 | } |
24137 | ||
24138 | static void | |
981a3fb3 | 24139 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 24140 | { |
b4f54984 | 24141 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
24142 | } |
24143 | ||
4bf44c1c | 24144 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
24145 | |
24146 | static void | |
c1bd65d0 | 24147 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 24148 | { |
9a3c8263 | 24149 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 24150 | int ix; |
8b70b953 | 24151 | |
626f2d1c TT |
24152 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
24153 | cleaning up. */ | |
24154 | dwarf2_per_objfile = NULL; | |
24155 | ||
59b0c7c1 JB |
24156 | for (ix = 0; ix < data->n_comp_units; ++ix) |
24157 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 24158 | |
59b0c7c1 | 24159 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 24160 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
24161 | data->all_type_units[ix]->per_cu.imported_symtabs); |
24162 | xfree (data->all_type_units); | |
95554aad | 24163 | |
8b70b953 | 24164 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
24165 | |
24166 | if (data->dwo_files) | |
24167 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
24168 | if (data->dwp_file) |
24169 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
24170 | |
24171 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
24172 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
3f563c84 PA |
24173 | |
24174 | if (data->index_table != NULL) | |
24175 | data->index_table->~mapped_index (); | |
9291a0cd TT |
24176 | } |
24177 | ||
24178 | \f | |
ae2de4f8 | 24179 | /* The "save gdb-index" command. */ |
9291a0cd | 24180 | |
bc8f2430 JK |
24181 | /* In-memory buffer to prepare data to be written later to a file. */ |
24182 | class data_buf | |
9291a0cd | 24183 | { |
bc8f2430 | 24184 | public: |
bc8f2430 JK |
24185 | /* Copy DATA to the end of the buffer. */ |
24186 | template<typename T> | |
24187 | void append_data (const T &data) | |
24188 | { | |
24189 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
24190 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 24191 | grow (sizeof (data))); |
bc8f2430 | 24192 | } |
b89be57b | 24193 | |
c2f134ac PA |
24194 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
24195 | terminating zero is appended too. */ | |
bc8f2430 JK |
24196 | void append_cstr0 (const char *cstr) |
24197 | { | |
24198 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
24199 | std::copy (cstr, cstr + size, grow (size)); |
24200 | } | |
24201 | ||
24202 | /* Accept a host-format integer in VAL and append it to the buffer | |
24203 | as a target-format integer which is LEN bytes long. */ | |
24204 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
24205 | { | |
24206 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 24207 | } |
9291a0cd | 24208 | |
bc8f2430 JK |
24209 | /* Return the size of the buffer. */ |
24210 | size_t size () const | |
24211 | { | |
24212 | return m_vec.size (); | |
24213 | } | |
24214 | ||
24215 | /* Write the buffer to FILE. */ | |
24216 | void file_write (FILE *file) const | |
24217 | { | |
a81e6d4d PA |
24218 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
24219 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
24220 | } |
24221 | ||
24222 | private: | |
c2f134ac PA |
24223 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
24224 | the start of the new block. */ | |
24225 | gdb_byte *grow (size_t size) | |
24226 | { | |
24227 | m_vec.resize (m_vec.size () + size); | |
24228 | return &*m_vec.end () - size; | |
24229 | } | |
24230 | ||
d5722aa2 | 24231 | gdb::byte_vector m_vec; |
bc8f2430 | 24232 | }; |
9291a0cd TT |
24233 | |
24234 | /* An entry in the symbol table. */ | |
24235 | struct symtab_index_entry | |
24236 | { | |
24237 | /* The name of the symbol. */ | |
24238 | const char *name; | |
24239 | /* The offset of the name in the constant pool. */ | |
24240 | offset_type index_offset; | |
24241 | /* A sorted vector of the indices of all the CUs that hold an object | |
24242 | of this name. */ | |
bc8f2430 | 24243 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
24244 | }; |
24245 | ||
24246 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
24247 | struct mapped_symtab | |
24248 | { | |
bc8f2430 JK |
24249 | mapped_symtab () |
24250 | { | |
24251 | data.resize (1024); | |
24252 | } | |
b89be57b | 24253 | |
bc8f2430 | 24254 | offset_type n_elements = 0; |
4b76cda9 | 24255 | std::vector<symtab_index_entry> data; |
bc8f2430 | 24256 | }; |
9291a0cd | 24257 | |
bc8f2430 | 24258 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
24259 | the slot. |
24260 | ||
24261 | Function is used only during write_hash_table so no index format backward | |
24262 | compatibility is needed. */ | |
b89be57b | 24263 | |
4b76cda9 | 24264 | static symtab_index_entry & |
9291a0cd TT |
24265 | find_slot (struct mapped_symtab *symtab, const char *name) |
24266 | { | |
559a7a62 | 24267 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 24268 | |
bc8f2430 JK |
24269 | index = hash & (symtab->data.size () - 1); |
24270 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
24271 | |
24272 | for (;;) | |
24273 | { | |
4b76cda9 PA |
24274 | if (symtab->data[index].name == NULL |
24275 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
24276 | return symtab->data[index]; |
24277 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
24278 | } |
24279 | } | |
24280 | ||
24281 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 24282 | |
9291a0cd TT |
24283 | static void |
24284 | hash_expand (struct mapped_symtab *symtab) | |
24285 | { | |
bc8f2430 | 24286 | auto old_entries = std::move (symtab->data); |
9291a0cd | 24287 | |
bc8f2430 JK |
24288 | symtab->data.clear (); |
24289 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 24290 | |
bc8f2430 | 24291 | for (auto &it : old_entries) |
4b76cda9 | 24292 | if (it.name != NULL) |
bc8f2430 | 24293 | { |
4b76cda9 | 24294 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
24295 | ref = std::move (it); |
24296 | } | |
9291a0cd TT |
24297 | } |
24298 | ||
156942c7 DE |
24299 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
24300 | CU_INDEX is the index of the CU in which the symbol appears. | |
24301 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 24302 | |
9291a0cd TT |
24303 | static void |
24304 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 24305 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
24306 | offset_type cu_index) |
24307 | { | |
156942c7 | 24308 | offset_type cu_index_and_attrs; |
9291a0cd TT |
24309 | |
24310 | ++symtab->n_elements; | |
bc8f2430 | 24311 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
24312 | hash_expand (symtab); |
24313 | ||
4b76cda9 PA |
24314 | symtab_index_entry &slot = find_slot (symtab, name); |
24315 | if (slot.name == NULL) | |
9291a0cd | 24316 | { |
4b76cda9 | 24317 | slot.name = name; |
156942c7 | 24318 | /* index_offset is set later. */ |
9291a0cd | 24319 | } |
156942c7 DE |
24320 | |
24321 | cu_index_and_attrs = 0; | |
24322 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
24323 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
24324 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
24325 | ||
24326 | /* We don't want to record an index value twice as we want to avoid the | |
24327 | duplication. | |
24328 | We process all global symbols and then all static symbols | |
24329 | (which would allow us to avoid the duplication by only having to check | |
24330 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
24331 | To keep things simple we don't worry about the duplication here and | |
24332 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 24333 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
24334 | } |
24335 | ||
24336 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
24337 | ||
24338 | static void | |
24339 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
24340 | { | |
4b76cda9 | 24341 | for (auto &entry : symtab->data) |
156942c7 | 24342 | { |
4b76cda9 | 24343 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 24344 | { |
4b76cda9 | 24345 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
24346 | std::sort (cu_indices.begin (), cu_indices.end ()); |
24347 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
24348 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
24349 | } |
24350 | } | |
9291a0cd TT |
24351 | } |
24352 | ||
bc8f2430 JK |
24353 | /* A form of 'const char *' suitable for container keys. Only the |
24354 | pointer is stored. The strings themselves are compared, not the | |
24355 | pointers. */ | |
24356 | class c_str_view | |
9291a0cd | 24357 | { |
bc8f2430 JK |
24358 | public: |
24359 | c_str_view (const char *cstr) | |
24360 | : m_cstr (cstr) | |
24361 | {} | |
9291a0cd | 24362 | |
bc8f2430 JK |
24363 | bool operator== (const c_str_view &other) const |
24364 | { | |
24365 | return strcmp (m_cstr, other.m_cstr) == 0; | |
24366 | } | |
9291a0cd | 24367 | |
bc8f2430 JK |
24368 | private: |
24369 | friend class c_str_view_hasher; | |
24370 | const char *const m_cstr; | |
24371 | }; | |
9291a0cd | 24372 | |
bc8f2430 JK |
24373 | /* A std::unordered_map::hasher for c_str_view that uses the right |
24374 | hash function for strings in a mapped index. */ | |
24375 | class c_str_view_hasher | |
24376 | { | |
24377 | public: | |
24378 | size_t operator () (const c_str_view &x) const | |
24379 | { | |
24380 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
24381 | } | |
24382 | }; | |
b89be57b | 24383 | |
bc8f2430 JK |
24384 | /* A std::unordered_map::hasher for std::vector<>. */ |
24385 | template<typename T> | |
24386 | class vector_hasher | |
9291a0cd | 24387 | { |
bc8f2430 JK |
24388 | public: |
24389 | size_t operator () (const std::vector<T> &key) const | |
24390 | { | |
24391 | return iterative_hash (key.data (), | |
24392 | sizeof (key.front ()) * key.size (), 0); | |
24393 | } | |
24394 | }; | |
9291a0cd | 24395 | |
bc8f2430 JK |
24396 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
24397 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 24398 | |
bc8f2430 JK |
24399 | static void |
24400 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
24401 | { | |
24402 | { | |
24403 | /* Elements are sorted vectors of the indices of all the CUs that | |
24404 | hold an object of this name. */ | |
24405 | std::unordered_map<std::vector<offset_type>, offset_type, | |
24406 | vector_hasher<offset_type>> | |
24407 | symbol_hash_table; | |
24408 | ||
24409 | /* We add all the index vectors to the constant pool first, to | |
24410 | ensure alignment is ok. */ | |
4b76cda9 | 24411 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 24412 | { |
4b76cda9 | 24413 | if (entry.name == NULL) |
bc8f2430 | 24414 | continue; |
4b76cda9 | 24415 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
24416 | |
24417 | /* Finding before inserting is faster than always trying to | |
24418 | insert, because inserting always allocates a node, does the | |
24419 | lookup, and then destroys the new node if another node | |
24420 | already had the same key. C++17 try_emplace will avoid | |
24421 | this. */ | |
24422 | const auto found | |
4b76cda9 | 24423 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
24424 | if (found != symbol_hash_table.end ()) |
24425 | { | |
4b76cda9 | 24426 | entry.index_offset = found->second; |
70a1152b PA |
24427 | continue; |
24428 | } | |
24429 | ||
4b76cda9 PA |
24430 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
24431 | entry.index_offset = cpool.size (); | |
24432 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
24433 | for (const auto index : entry.cu_indices) | |
24434 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
24435 | } |
24436 | } | |
9291a0cd TT |
24437 | |
24438 | /* Now write out the hash table. */ | |
bc8f2430 | 24439 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 24440 | for (const auto &entry : symtab->data) |
9291a0cd TT |
24441 | { |
24442 | offset_type str_off, vec_off; | |
24443 | ||
4b76cda9 | 24444 | if (entry.name != NULL) |
9291a0cd | 24445 | { |
4b76cda9 | 24446 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 24447 | if (insertpair.second) |
4b76cda9 | 24448 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 24449 | str_off = insertpair.first->second; |
4b76cda9 | 24450 | vec_off = entry.index_offset; |
9291a0cd TT |
24451 | } |
24452 | else | |
24453 | { | |
24454 | /* While 0 is a valid constant pool index, it is not valid | |
24455 | to have 0 for both offsets. */ | |
24456 | str_off = 0; | |
24457 | vec_off = 0; | |
24458 | } | |
24459 | ||
bc8f2430 JK |
24460 | output.append_data (MAYBE_SWAP (str_off)); |
24461 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 24462 | } |
9291a0cd TT |
24463 | } |
24464 | ||
bc8f2430 | 24465 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
24466 | |
24467 | /* Helper struct for building the address table. */ | |
24468 | struct addrmap_index_data | |
24469 | { | |
bc8f2430 JK |
24470 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
24471 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
24472 | {} | |
24473 | ||
0a5429f6 | 24474 | struct objfile *objfile; |
bc8f2430 JK |
24475 | data_buf &addr_vec; |
24476 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
24477 | |
24478 | /* Non-zero if the previous_* fields are valid. | |
24479 | We can't write an entry until we see the next entry (since it is only then | |
24480 | that we know the end of the entry). */ | |
24481 | int previous_valid; | |
24482 | /* Index of the CU in the table of all CUs in the index file. */ | |
24483 | unsigned int previous_cu_index; | |
0963b4bd | 24484 | /* Start address of the CU. */ |
0a5429f6 DE |
24485 | CORE_ADDR previous_cu_start; |
24486 | }; | |
24487 | ||
bc8f2430 | 24488 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 24489 | |
9291a0cd | 24490 | static void |
bc8f2430 | 24491 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 24492 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 24493 | { |
9291a0cd TT |
24494 | CORE_ADDR baseaddr; |
24495 | ||
24496 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
24497 | ||
c2f134ac PA |
24498 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
24499 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 24500 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
24501 | } |
24502 | ||
24503 | /* Worker function for traversing an addrmap to build the address table. */ | |
24504 | ||
24505 | static int | |
24506 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
24507 | { | |
9a3c8263 SM |
24508 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
24509 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
24510 | |
24511 | if (data->previous_valid) | |
bc8f2430 | 24512 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
24513 | data->previous_cu_start, start_addr, |
24514 | data->previous_cu_index); | |
24515 | ||
24516 | data->previous_cu_start = start_addr; | |
24517 | if (pst != NULL) | |
24518 | { | |
bc8f2430 JK |
24519 | const auto it = data->cu_index_htab.find (pst); |
24520 | gdb_assert (it != data->cu_index_htab.cend ()); | |
24521 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
24522 | data->previous_valid = 1; |
24523 | } | |
24524 | else | |
bc8f2430 | 24525 | data->previous_valid = 0; |
0a5429f6 DE |
24526 | |
24527 | return 0; | |
24528 | } | |
24529 | ||
bc8f2430 | 24530 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
24531 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
24532 | in the index file. */ | |
24533 | ||
24534 | static void | |
bc8f2430 JK |
24535 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
24536 | psym_index_map &cu_index_htab) | |
0a5429f6 | 24537 | { |
bc8f2430 | 24538 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
24539 | |
24540 | /* When writing the address table, we have to cope with the fact that | |
24541 | the addrmap iterator only provides the start of a region; we have to | |
24542 | wait until the next invocation to get the start of the next region. */ | |
24543 | ||
24544 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
24545 | addrmap_index_data.previous_valid = 0; |
24546 | ||
24547 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
24548 | &addrmap_index_data); | |
24549 | ||
24550 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
24551 | is valid, but we should still handle it. | |
24552 | The end address is recorded as the start of the next region, but that | |
24553 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
24554 | anyway. */ | |
24555 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 24556 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
24557 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
24558 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
24559 | } |
24560 | ||
156942c7 DE |
24561 | /* Return the symbol kind of PSYM. */ |
24562 | ||
24563 | static gdb_index_symbol_kind | |
24564 | symbol_kind (struct partial_symbol *psym) | |
24565 | { | |
24566 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
24567 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
24568 | ||
24569 | switch (domain) | |
24570 | { | |
24571 | case VAR_DOMAIN: | |
24572 | switch (aclass) | |
24573 | { | |
24574 | case LOC_BLOCK: | |
24575 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
24576 | case LOC_TYPEDEF: | |
24577 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24578 | case LOC_COMPUTED: | |
24579 | case LOC_CONST_BYTES: | |
24580 | case LOC_OPTIMIZED_OUT: | |
24581 | case LOC_STATIC: | |
24582 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24583 | case LOC_CONST: | |
24584 | /* Note: It's currently impossible to recognize psyms as enum values | |
24585 | short of reading the type info. For now punt. */ | |
24586 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24587 | default: | |
24588 | /* There are other LOC_FOO values that one might want to classify | |
24589 | as variables, but dwarf2read.c doesn't currently use them. */ | |
24590 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24591 | } | |
24592 | case STRUCT_DOMAIN: | |
24593 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24594 | default: | |
24595 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24596 | } | |
24597 | } | |
24598 | ||
9291a0cd | 24599 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 24600 | |
9291a0cd TT |
24601 | static void |
24602 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 24603 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
24604 | struct partial_symbol **psymp, |
24605 | int count, | |
987d643c TT |
24606 | offset_type cu_index, |
24607 | int is_static) | |
9291a0cd TT |
24608 | { |
24609 | for (; count-- > 0; ++psymp) | |
24610 | { | |
156942c7 | 24611 | struct partial_symbol *psym = *psymp; |
987d643c | 24612 | |
156942c7 | 24613 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 24614 | error (_("Ada is not currently supported by the index")); |
987d643c | 24615 | |
987d643c | 24616 | /* Only add a given psymbol once. */ |
bc8f2430 | 24617 | if (psyms_seen.insert (psym).second) |
987d643c | 24618 | { |
156942c7 DE |
24619 | gdb_index_symbol_kind kind = symbol_kind (psym); |
24620 | ||
156942c7 DE |
24621 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
24622 | is_static, kind, cu_index); | |
987d643c | 24623 | } |
9291a0cd TT |
24624 | } |
24625 | } | |
24626 | ||
1fd400ff TT |
24627 | /* A helper struct used when iterating over debug_types. */ |
24628 | struct signatured_type_index_data | |
24629 | { | |
bc8f2430 JK |
24630 | signatured_type_index_data (data_buf &types_list_, |
24631 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
24632 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
24633 | {} | |
24634 | ||
1fd400ff TT |
24635 | struct objfile *objfile; |
24636 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
24637 | data_buf &types_list; |
24638 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
24639 | int cu_index; |
24640 | }; | |
24641 | ||
24642 | /* A helper function that writes a single signatured_type to an | |
24643 | obstack. */ | |
b89be57b | 24644 | |
1fd400ff TT |
24645 | static int |
24646 | write_one_signatured_type (void **slot, void *d) | |
24647 | { | |
9a3c8263 SM |
24648 | struct signatured_type_index_data *info |
24649 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 24650 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 24651 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
24652 | |
24653 | write_psymbols (info->symtab, | |
987d643c | 24654 | info->psyms_seen, |
af5bf4ad | 24655 | &info->objfile->global_psymbols[psymtab->globals_offset], |
987d643c TT |
24656 | psymtab->n_global_syms, info->cu_index, |
24657 | 0); | |
1fd400ff | 24658 | write_psymbols (info->symtab, |
987d643c | 24659 | info->psyms_seen, |
af5bf4ad | 24660 | &info->objfile->static_psymbols[psymtab->statics_offset], |
987d643c TT |
24661 | psymtab->n_static_syms, info->cu_index, |
24662 | 1); | |
1fd400ff | 24663 | |
c2f134ac PA |
24664 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24665 | to_underlying (entry->per_cu.sect_off)); | |
24666 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
24667 | to_underlying (entry->type_offset_in_tu)); | |
24668 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
24669 | |
24670 | ++info->cu_index; | |
24671 | ||
24672 | return 1; | |
24673 | } | |
24674 | ||
e8f8bcb3 PA |
24675 | /* Recurse into all "included" dependencies and count their symbols as |
24676 | if they appeared in this psymtab. */ | |
24677 | ||
24678 | static void | |
24679 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
24680 | size_t &psyms_seen) | |
24681 | { | |
24682 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
24683 | if (psymtab->dependencies[i]->user != NULL) | |
24684 | recursively_count_psymbols (psymtab->dependencies[i], | |
24685 | psyms_seen); | |
24686 | ||
24687 | psyms_seen += psymtab->n_global_syms; | |
24688 | psyms_seen += psymtab->n_static_syms; | |
24689 | } | |
24690 | ||
95554aad TT |
24691 | /* Recurse into all "included" dependencies and write their symbols as |
24692 | if they appeared in this psymtab. */ | |
24693 | ||
24694 | static void | |
24695 | recursively_write_psymbols (struct objfile *objfile, | |
24696 | struct partial_symtab *psymtab, | |
24697 | struct mapped_symtab *symtab, | |
bc8f2430 | 24698 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
24699 | offset_type cu_index) |
24700 | { | |
24701 | int i; | |
24702 | ||
24703 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
24704 | if (psymtab->dependencies[i]->user != NULL) | |
24705 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
24706 | symtab, psyms_seen, cu_index); | |
24707 | ||
24708 | write_psymbols (symtab, | |
24709 | psyms_seen, | |
af5bf4ad | 24710 | &objfile->global_psymbols[psymtab->globals_offset], |
95554aad TT |
24711 | psymtab->n_global_syms, cu_index, |
24712 | 0); | |
24713 | write_psymbols (symtab, | |
24714 | psyms_seen, | |
af5bf4ad | 24715 | &objfile->static_psymbols[psymtab->statics_offset], |
95554aad TT |
24716 | psymtab->n_static_syms, cu_index, |
24717 | 1); | |
24718 | } | |
24719 | ||
9291a0cd | 24720 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 24721 | |
9291a0cd TT |
24722 | static void |
24723 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
24724 | { | |
9291a0cd TT |
24725 | if (dwarf2_per_objfile->using_index) |
24726 | error (_("Cannot use an index to create the index")); | |
24727 | ||
8b70b953 TT |
24728 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
24729 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
24730 | ||
260b681b DE |
24731 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
24732 | return; | |
24733 | ||
bc8f2430 | 24734 | struct stat st; |
4262abfb JK |
24735 | if (stat (objfile_name (objfile), &st) < 0) |
24736 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 24737 | |
bc8f2430 JK |
24738 | std::string filename (std::string (dir) + SLASH_STRING |
24739 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 24740 | |
d419f42d | 24741 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 24742 | if (!out_file) |
bc8f2430 | 24743 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 24744 | |
16b7a719 PA |
24745 | /* Order matters here; we want FILE to be closed before FILENAME is |
24746 | unlinked, because on MS-Windows one cannot delete a file that is | |
24747 | still open. (Don't call anything here that might throw until | |
24748 | file_closer is created.) */ | |
bc8f2430 | 24749 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 24750 | gdb_file_up close_out_file (out_file); |
9291a0cd | 24751 | |
bc8f2430 JK |
24752 | mapped_symtab symtab; |
24753 | data_buf cu_list; | |
987d643c | 24754 | |
0a5429f6 DE |
24755 | /* While we're scanning CU's create a table that maps a psymtab pointer |
24756 | (which is what addrmap records) to its index (which is what is recorded | |
24757 | in the index file). This will later be needed to write the address | |
24758 | table. */ | |
bc8f2430 JK |
24759 | psym_index_map cu_index_htab; |
24760 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
24761 | |
24762 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
24763 | work here. Also, the debug_types entries do not appear in |
24764 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
24765 | |
24766 | /* The psyms_seen set is potentially going to be largish (~40k | |
24767 | elements when indexing a -g3 build of GDB itself). Estimate the | |
24768 | number of elements in order to avoid too many rehashes, which | |
24769 | require rebuilding buckets and thus many trips to | |
24770 | malloc/free. */ | |
24771 | size_t psyms_count = 0; | |
24772 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24773 | { | |
24774 | struct dwarf2_per_cu_data *per_cu | |
24775 | = dwarf2_per_objfile->all_comp_units[i]; | |
24776 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
24777 | ||
24778 | if (psymtab != NULL && psymtab->user == NULL) | |
24779 | recursively_count_psymbols (psymtab, psyms_count); | |
24780 | } | |
24781 | /* Generating an index for gdb itself shows a ratio of | |
24782 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
24783 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 24784 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 24785 | { |
3e43a32a MS |
24786 | struct dwarf2_per_cu_data *per_cu |
24787 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 24788 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 24789 | |
92fac807 JK |
24790 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
24791 | It may be referenced from a local scope but in such case it does not | |
24792 | need to be present in .gdb_index. */ | |
24793 | if (psymtab == NULL) | |
24794 | continue; | |
24795 | ||
95554aad | 24796 | if (psymtab->user == NULL) |
bc8f2430 JK |
24797 | recursively_write_psymbols (objfile, psymtab, &symtab, |
24798 | psyms_seen, i); | |
9291a0cd | 24799 | |
bc8f2430 JK |
24800 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
24801 | gdb_assert (insertpair.second); | |
9291a0cd | 24802 | |
c2f134ac PA |
24803 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24804 | to_underlying (per_cu->sect_off)); | |
24805 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
24806 | } |
24807 | ||
0a5429f6 | 24808 | /* Dump the address map. */ |
bc8f2430 JK |
24809 | data_buf addr_vec; |
24810 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 24811 | |
1fd400ff | 24812 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 24813 | data_buf types_cu_list; |
1fd400ff TT |
24814 | if (dwarf2_per_objfile->signatured_types) |
24815 | { | |
bc8f2430 JK |
24816 | signatured_type_index_data sig_data (types_cu_list, |
24817 | psyms_seen); | |
1fd400ff TT |
24818 | |
24819 | sig_data.objfile = objfile; | |
bc8f2430 | 24820 | sig_data.symtab = &symtab; |
1fd400ff TT |
24821 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
24822 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
24823 | write_one_signatured_type, &sig_data); | |
24824 | } | |
24825 | ||
156942c7 DE |
24826 | /* Now that we've processed all symbols we can shrink their cu_indices |
24827 | lists. */ | |
bc8f2430 | 24828 | uniquify_cu_indices (&symtab); |
156942c7 | 24829 | |
bc8f2430 JK |
24830 | data_buf symtab_vec, constant_pool; |
24831 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 24832 | |
bc8f2430 JK |
24833 | data_buf contents; |
24834 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
24835 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
24836 | |
24837 | /* The version number. */ | |
bc8f2430 | 24838 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
24839 | |
24840 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
24841 | contents.append_data (MAYBE_SWAP (total_len)); |
24842 | total_len += cu_list.size (); | |
9291a0cd | 24843 | |
1fd400ff | 24844 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
24845 | contents.append_data (MAYBE_SWAP (total_len)); |
24846 | total_len += types_cu_list.size (); | |
1fd400ff | 24847 | |
9291a0cd | 24848 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
24849 | contents.append_data (MAYBE_SWAP (total_len)); |
24850 | total_len += addr_vec.size (); | |
9291a0cd TT |
24851 | |
24852 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
24853 | contents.append_data (MAYBE_SWAP (total_len)); |
24854 | total_len += symtab_vec.size (); | |
9291a0cd TT |
24855 | |
24856 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
24857 | contents.append_data (MAYBE_SWAP (total_len)); |
24858 | total_len += constant_pool.size (); | |
9291a0cd | 24859 | |
bc8f2430 | 24860 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 24861 | |
bc8f2430 JK |
24862 | contents.file_write (out_file); |
24863 | cu_list.file_write (out_file); | |
24864 | types_cu_list.file_write (out_file); | |
24865 | addr_vec.file_write (out_file); | |
24866 | symtab_vec.file_write (out_file); | |
24867 | constant_pool.file_write (out_file); | |
9291a0cd | 24868 | |
bef155c3 TT |
24869 | /* We want to keep the file. */ |
24870 | unlink_file.keep (); | |
9291a0cd TT |
24871 | } |
24872 | ||
90476074 TT |
24873 | /* Implementation of the `save gdb-index' command. |
24874 | ||
24875 | Note that the file format used by this command is documented in the | |
24876 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 24877 | |
9291a0cd | 24878 | static void |
8384c356 | 24879 | save_gdb_index_command (const char *arg, int from_tty) |
9291a0cd TT |
24880 | { |
24881 | struct objfile *objfile; | |
24882 | ||
24883 | if (!arg || !*arg) | |
96d19272 | 24884 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
24885 | |
24886 | ALL_OBJFILES (objfile) | |
24887 | { | |
24888 | struct stat st; | |
24889 | ||
24890 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 24891 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
24892 | continue; |
24893 | ||
9a3c8263 SM |
24894 | dwarf2_per_objfile |
24895 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
24896 | dwarf2_objfile_data_key); | |
9291a0cd TT |
24897 | if (dwarf2_per_objfile) |
24898 | { | |
9291a0cd | 24899 | |
492d29ea | 24900 | TRY |
9291a0cd TT |
24901 | { |
24902 | write_psymtabs_to_index (objfile, arg); | |
24903 | } | |
492d29ea PA |
24904 | CATCH (except, RETURN_MASK_ERROR) |
24905 | { | |
24906 | exception_fprintf (gdb_stderr, except, | |
24907 | _("Error while writing index for `%s': "), | |
24908 | objfile_name (objfile)); | |
24909 | } | |
24910 | END_CATCH | |
9291a0cd TT |
24911 | } |
24912 | } | |
dce234bc PP |
24913 | } |
24914 | ||
9291a0cd TT |
24915 | \f |
24916 | ||
b4f54984 | 24917 | int dwarf_always_disassemble; |
9eae7c52 TT |
24918 | |
24919 | static void | |
b4f54984 DE |
24920 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24921 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24922 | { |
3e43a32a MS |
24923 | fprintf_filtered (file, |
24924 | _("Whether to always disassemble " | |
24925 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24926 | value); |
24927 | } | |
24928 | ||
900e11f9 JK |
24929 | static void |
24930 | show_check_physname (struct ui_file *file, int from_tty, | |
24931 | struct cmd_list_element *c, const char *value) | |
24932 | { | |
24933 | fprintf_filtered (file, | |
24934 | _("Whether to check \"physname\" is %s.\n"), | |
24935 | value); | |
24936 | } | |
24937 | ||
6502dd73 DJ |
24938 | void |
24939 | _initialize_dwarf2_read (void) | |
24940 | { | |
96d19272 JK |
24941 | struct cmd_list_element *c; |
24942 | ||
dce234bc | 24943 | dwarf2_objfile_data_key |
c1bd65d0 | 24944 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24945 | |
b4f54984 DE |
24946 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24947 | Set DWARF specific variables.\n\ | |
24948 | Configure DWARF variables such as the cache size"), | |
24949 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24950 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24951 | ||
b4f54984 DE |
24952 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24953 | Show DWARF specific variables\n\ | |
24954 | Show DWARF variables such as the cache size"), | |
24955 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24956 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24957 | ||
24958 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24959 | &dwarf_max_cache_age, _("\ |
24960 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24961 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24962 | A higher limit means that cached compilation units will be stored\n\ |
24963 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24964 | caching, which can slow down startup."), | |
2c5b56ce | 24965 | NULL, |
b4f54984 DE |
24966 | show_dwarf_max_cache_age, |
24967 | &set_dwarf_cmdlist, | |
24968 | &show_dwarf_cmdlist); | |
d97bc12b | 24969 | |
9eae7c52 | 24970 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24971 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24972 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24973 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24974 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24975 | syntax. When disabled, expressions will be printed in a more\n\ | |
24976 | conversational style, when possible."), | |
24977 | NULL, | |
b4f54984 DE |
24978 | show_dwarf_always_disassemble, |
24979 | &set_dwarf_cmdlist, | |
24980 | &show_dwarf_cmdlist); | |
24981 | ||
24982 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
24983 | Set debugging of the DWARF reader."), _("\ | |
24984 | Show debugging of the DWARF reader."), _("\ | |
24985 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
24986 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
24987 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
24988 | NULL, |
24989 | NULL, | |
24990 | &setdebuglist, &showdebuglist); | |
24991 | ||
b4f54984 DE |
24992 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24993 | Set debugging of the DWARF DIE reader."), _("\ | |
24994 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
24995 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
24996 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
24997 | NULL, |
24998 | NULL, | |
24999 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25000 | |
27e0867f DE |
25001 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
25002 | Set debugging of the dwarf line reader."), _("\ | |
25003 | Show debugging of the dwarf line reader."), _("\ | |
25004 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
25005 | A value of 1 (one) provides basic information.\n\ | |
25006 | A value greater than 1 provides more verbose information."), | |
25007 | NULL, | |
25008 | NULL, | |
25009 | &setdebuglist, &showdebuglist); | |
25010 | ||
900e11f9 JK |
25011 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
25012 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
25013 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
25014 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
25015 | the demangler."), | |
25016 | NULL, show_check_physname, | |
25017 | &setdebuglist, &showdebuglist); | |
25018 | ||
e615022a DE |
25019 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
25020 | no_class, &use_deprecated_index_sections, _("\ | |
25021 | Set whether to use deprecated gdb_index sections."), _("\ | |
25022 | Show whether to use deprecated gdb_index sections."), _("\ | |
25023 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
25024 | Normally they are ignored either because of a missing feature or\n\ | |
25025 | performance issue.\n\ | |
25026 | Warning: This option must be enabled before gdb reads the file."), | |
25027 | NULL, | |
25028 | NULL, | |
25029 | &setlist, &showlist); | |
25030 | ||
96d19272 | 25031 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 25032 | _("\ |
fc1a9d6e | 25033 | Save a gdb-index file.\n\ |
11570e71 | 25034 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
25035 | &save_cmdlist); |
25036 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
25037 | |
25038 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25039 | &dwarf2_locexpr_funcs); | |
25040 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25041 | &dwarf2_loclist_funcs); | |
25042 | ||
25043 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25044 | &dwarf2_block_frame_base_locexpr_funcs); | |
25045 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25046 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
25047 | |
25048 | #if GDB_SELF_TEST | |
25049 | selftests::register_test ("dw2_expand_symtabs_matching", | |
25050 | selftests::dw2_expand_symtabs_matching::run_test); | |
25051 | #endif | |
6502dd73 | 25052 | } |