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 | ||
259 | /* Convenience method to get at the name of the symbol at IDX in the | |
260 | symbol table. */ | |
261 | const char *symbol_name_at (offset_type idx) const | |
262 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx]); } | |
9291a0cd TT |
263 | }; |
264 | ||
95554aad TT |
265 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
266 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
267 | ||
52059ffd TT |
268 | struct tu_stats |
269 | { | |
270 | int nr_uniq_abbrev_tables; | |
271 | int nr_symtabs; | |
272 | int nr_symtab_sharers; | |
273 | int nr_stmt_less_type_units; | |
274 | int nr_all_type_units_reallocs; | |
275 | }; | |
276 | ||
9cdd5dbd DE |
277 | /* Collection of data recorded per objfile. |
278 | This hangs off of dwarf2_objfile_data_key. */ | |
279 | ||
6502dd73 DJ |
280 | struct dwarf2_per_objfile |
281 | { | |
330cdd98 PA |
282 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
283 | dwarf2 section names, or is NULL if the standard ELF names are | |
284 | used. */ | |
285 | dwarf2_per_objfile (struct objfile *objfile, | |
286 | const dwarf2_debug_sections *names); | |
ae038cb0 | 287 | |
330cdd98 PA |
288 | ~dwarf2_per_objfile (); |
289 | ||
d6541620 | 290 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
291 | |
292 | /* Free all cached compilation units. */ | |
293 | void free_cached_comp_units (); | |
294 | private: | |
295 | /* This function is mapped across the sections and remembers the | |
296 | offset and size of each of the debugging sections we are | |
297 | interested in. */ | |
298 | void locate_sections (bfd *abfd, asection *sectp, | |
299 | const dwarf2_debug_sections &names); | |
300 | ||
301 | public: | |
302 | dwarf2_section_info info {}; | |
303 | dwarf2_section_info abbrev {}; | |
304 | dwarf2_section_info line {}; | |
305 | dwarf2_section_info loc {}; | |
306 | dwarf2_section_info loclists {}; | |
307 | dwarf2_section_info macinfo {}; | |
308 | dwarf2_section_info macro {}; | |
309 | dwarf2_section_info str {}; | |
310 | dwarf2_section_info line_str {}; | |
311 | dwarf2_section_info ranges {}; | |
312 | dwarf2_section_info rnglists {}; | |
313 | dwarf2_section_info addr {}; | |
314 | dwarf2_section_info frame {}; | |
315 | dwarf2_section_info eh_frame {}; | |
316 | dwarf2_section_info gdb_index {}; | |
317 | ||
318 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 319 | |
be391dca | 320 | /* Back link. */ |
330cdd98 | 321 | struct objfile *objfile = NULL; |
be391dca | 322 | |
d467dd73 | 323 | /* Table of all the compilation units. This is used to locate |
10b3939b | 324 | the target compilation unit of a particular reference. */ |
330cdd98 | 325 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
326 | |
327 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 328 | int n_comp_units = 0; |
ae038cb0 | 329 | |
1fd400ff | 330 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 331 | int n_type_units = 0; |
1fd400ff | 332 | |
6aa5f3a6 DE |
333 | /* The number of elements allocated in all_type_units. |
334 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 335 | int n_allocated_type_units = 0; |
6aa5f3a6 | 336 | |
a2ce51a0 DE |
337 | /* The .debug_types-related CUs (TUs). |
338 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 339 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 340 | |
f4dc4d17 DE |
341 | /* Table of struct type_unit_group objects. |
342 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 343 | htab_t type_unit_groups {}; |
72dca2f5 | 344 | |
348e048f DE |
345 | /* A table mapping .debug_types signatures to its signatured_type entry. |
346 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 347 | htab_t signatured_types {}; |
348e048f | 348 | |
f4dc4d17 DE |
349 | /* Type unit statistics, to see how well the scaling improvements |
350 | are doing. */ | |
330cdd98 | 351 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
352 | |
353 | /* A chain of compilation units that are currently read in, so that | |
354 | they can be freed later. */ | |
330cdd98 | 355 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 356 | |
3019eac3 DE |
357 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
358 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 359 | htab_t dwo_files {}; |
3019eac3 | 360 | |
330cdd98 PA |
361 | /* True if we've checked for whether there is a DWP file. */ |
362 | bool dwp_checked = false; | |
80626a55 DE |
363 | |
364 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 365 | struct dwp_file *dwp_file = NULL; |
80626a55 | 366 | |
36586728 TT |
367 | /* The shared '.dwz' file, if one exists. This is used when the |
368 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 369 | struct dwz_file *dwz_file = NULL; |
36586728 | 370 | |
330cdd98 | 371 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 372 | VMA of 0. */ |
330cdd98 | 373 | bool has_section_at_zero = false; |
9291a0cd | 374 | |
ae2de4f8 DE |
375 | /* True if we are using the mapped index, |
376 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 377 | bool using_index = false; |
9291a0cd | 378 | |
ae2de4f8 | 379 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 380 | mapped_index *index_table = NULL; |
98bfdba5 | 381 | |
7b9f3c50 | 382 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
383 | TUs typically share line table entries with a CU, so we maintain a |
384 | separate table of all line table entries to support the sharing. | |
385 | Note that while there can be way more TUs than CUs, we've already | |
386 | sorted all the TUs into "type unit groups", grouped by their | |
387 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
388 | CU and its associated TU group if there is one. */ | |
330cdd98 | 389 | htab_t quick_file_names_table {}; |
7b9f3c50 | 390 | |
98bfdba5 PA |
391 | /* Set during partial symbol reading, to prevent queueing of full |
392 | symbols. */ | |
330cdd98 | 393 | bool reading_partial_symbols = false; |
673bfd45 | 394 | |
dee91e82 | 395 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 396 | This is NULL if not allocated yet. |
02142a6c | 397 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 398 | htab_t die_type_hash {}; |
95554aad TT |
399 | |
400 | /* The CUs we recently read. */ | |
330cdd98 | 401 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
402 | |
403 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 404 | htab_t line_header_hash {}; |
bbf2f4df PA |
405 | |
406 | /* Table containing all filenames. This is an optional because the | |
407 | table is lazily constructed on first access. */ | |
408 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
409 | }; |
410 | ||
411 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 412 | |
251d32d9 | 413 | /* Default names of the debugging sections. */ |
c906108c | 414 | |
233a11ab CS |
415 | /* Note that if the debugging section has been compressed, it might |
416 | have a name like .zdebug_info. */ | |
417 | ||
9cdd5dbd DE |
418 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
419 | { | |
251d32d9 TG |
420 | { ".debug_info", ".zdebug_info" }, |
421 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
422 | { ".debug_line", ".zdebug_line" }, | |
423 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 424 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 425 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 426 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 427 | { ".debug_str", ".zdebug_str" }, |
43988095 | 428 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 429 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 430 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 431 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 432 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
433 | { ".debug_frame", ".zdebug_frame" }, |
434 | { ".eh_frame", NULL }, | |
24d3216f TT |
435 | { ".gdb_index", ".zgdb_index" }, |
436 | 23 | |
251d32d9 | 437 | }; |
c906108c | 438 | |
80626a55 | 439 | /* List of DWO/DWP sections. */ |
3019eac3 | 440 | |
80626a55 | 441 | static const struct dwop_section_names |
3019eac3 DE |
442 | { |
443 | struct dwarf2_section_names abbrev_dwo; | |
444 | struct dwarf2_section_names info_dwo; | |
445 | struct dwarf2_section_names line_dwo; | |
446 | struct dwarf2_section_names loc_dwo; | |
43988095 | 447 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
448 | struct dwarf2_section_names macinfo_dwo; |
449 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
450 | struct dwarf2_section_names str_dwo; |
451 | struct dwarf2_section_names str_offsets_dwo; | |
452 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
453 | struct dwarf2_section_names cu_index; |
454 | struct dwarf2_section_names tu_index; | |
3019eac3 | 455 | } |
80626a55 | 456 | dwop_section_names = |
3019eac3 DE |
457 | { |
458 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
459 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
460 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
461 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 462 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
463 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
464 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
465 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
466 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
467 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
468 | { ".debug_cu_index", ".zdebug_cu_index" }, |
469 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
470 | }; |
471 | ||
c906108c SS |
472 | /* local data types */ |
473 | ||
107d2387 AC |
474 | /* The data in a compilation unit header, after target2host |
475 | translation, looks like this. */ | |
c906108c | 476 | struct comp_unit_head |
a738430d | 477 | { |
c764a876 | 478 | unsigned int length; |
a738430d | 479 | short version; |
a738430d MK |
480 | unsigned char addr_size; |
481 | unsigned char signed_addr_p; | |
9c541725 | 482 | sect_offset abbrev_sect_off; |
57349743 | 483 | |
a738430d MK |
484 | /* Size of file offsets; either 4 or 8. */ |
485 | unsigned int offset_size; | |
57349743 | 486 | |
a738430d MK |
487 | /* Size of the length field; either 4 or 12. */ |
488 | unsigned int initial_length_size; | |
57349743 | 489 | |
43988095 JK |
490 | enum dwarf_unit_type unit_type; |
491 | ||
a738430d MK |
492 | /* Offset to the first byte of this compilation unit header in the |
493 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 494 | sect_offset sect_off; |
57349743 | 495 | |
d00adf39 DE |
496 | /* Offset to first die in this cu from the start of the cu. |
497 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 498 | cu_offset first_die_cu_offset; |
43988095 JK |
499 | |
500 | /* 64-bit signature of this type unit - it is valid only for | |
501 | UNIT_TYPE DW_UT_type. */ | |
502 | ULONGEST signature; | |
503 | ||
504 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 505 | cu_offset type_cu_offset_in_tu; |
a738430d | 506 | }; |
c906108c | 507 | |
3da10d80 KS |
508 | /* Type used for delaying computation of method physnames. |
509 | See comments for compute_delayed_physnames. */ | |
510 | struct delayed_method_info | |
511 | { | |
512 | /* The type to which the method is attached, i.e., its parent class. */ | |
513 | struct type *type; | |
514 | ||
515 | /* The index of the method in the type's function fieldlists. */ | |
516 | int fnfield_index; | |
517 | ||
518 | /* The index of the method in the fieldlist. */ | |
519 | int index; | |
520 | ||
521 | /* The name of the DIE. */ | |
522 | const char *name; | |
523 | ||
524 | /* The DIE associated with this method. */ | |
525 | struct die_info *die; | |
526 | }; | |
527 | ||
528 | typedef struct delayed_method_info delayed_method_info; | |
529 | DEF_VEC_O (delayed_method_info); | |
530 | ||
e7c27a73 DJ |
531 | /* Internal state when decoding a particular compilation unit. */ |
532 | struct dwarf2_cu | |
533 | { | |
534 | /* The objfile containing this compilation unit. */ | |
535 | struct objfile *objfile; | |
536 | ||
d00adf39 | 537 | /* The header of the compilation unit. */ |
e7c27a73 | 538 | struct comp_unit_head header; |
e142c38c | 539 | |
d00adf39 DE |
540 | /* Base address of this compilation unit. */ |
541 | CORE_ADDR base_address; | |
542 | ||
543 | /* Non-zero if base_address has been set. */ | |
544 | int base_known; | |
545 | ||
e142c38c DJ |
546 | /* The language we are debugging. */ |
547 | enum language language; | |
548 | const struct language_defn *language_defn; | |
549 | ||
b0f35d58 DL |
550 | const char *producer; |
551 | ||
e142c38c DJ |
552 | /* The generic symbol table building routines have separate lists for |
553 | file scope symbols and all all other scopes (local scopes). So | |
554 | we need to select the right one to pass to add_symbol_to_list(). | |
555 | We do it by keeping a pointer to the correct list in list_in_scope. | |
556 | ||
557 | FIXME: The original dwarf code just treated the file scope as the | |
558 | first local scope, and all other local scopes as nested local | |
559 | scopes, and worked fine. Check to see if we really need to | |
560 | distinguish these in buildsym.c. */ | |
561 | struct pending **list_in_scope; | |
562 | ||
433df2d4 DE |
563 | /* The abbrev table for this CU. |
564 | Normally this points to the abbrev table in the objfile. | |
565 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
566 | struct abbrev_table *abbrev_table; | |
72bf9492 | 567 | |
b64f50a1 JK |
568 | /* Hash table holding all the loaded partial DIEs |
569 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
570 | htab_t partial_dies; |
571 | ||
572 | /* Storage for things with the same lifetime as this read-in compilation | |
573 | unit, including partial DIEs. */ | |
574 | struct obstack comp_unit_obstack; | |
575 | ||
ae038cb0 DJ |
576 | /* When multiple dwarf2_cu structures are living in memory, this field |
577 | chains them all together, so that they can be released efficiently. | |
578 | We will probably also want a generation counter so that most-recently-used | |
579 | compilation units are cached... */ | |
580 | struct dwarf2_per_cu_data *read_in_chain; | |
581 | ||
69d751e3 | 582 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
583 | struct dwarf2_per_cu_data *per_cu; |
584 | ||
585 | /* How many compilation units ago was this CU last referenced? */ | |
586 | int last_used; | |
587 | ||
b64f50a1 JK |
588 | /* A hash table of DIE cu_offset for following references with |
589 | die_info->offset.sect_off as hash. */ | |
51545339 | 590 | htab_t die_hash; |
10b3939b DJ |
591 | |
592 | /* Full DIEs if read in. */ | |
593 | struct die_info *dies; | |
594 | ||
595 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
596 | units referenced by this one. Only set during full symbol processing; | |
597 | partial symbol tables do not have dependencies. */ | |
598 | htab_t dependencies; | |
599 | ||
cb1df416 DJ |
600 | /* Header data from the line table, during full symbol processing. */ |
601 | struct line_header *line_header; | |
4c8aa72d PA |
602 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
603 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
604 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
605 | to the line header as long as this DIE is being processed. See | |
606 | process_die_scope. */ | |
607 | die_info *line_header_die_owner; | |
cb1df416 | 608 | |
3da10d80 KS |
609 | /* A list of methods which need to have physnames computed |
610 | after all type information has been read. */ | |
611 | VEC (delayed_method_info) *method_list; | |
612 | ||
96408a79 SA |
613 | /* To be copied to symtab->call_site_htab. */ |
614 | htab_t call_site_htab; | |
615 | ||
034e5797 DE |
616 | /* Non-NULL if this CU came from a DWO file. |
617 | There is an invariant here that is important to remember: | |
618 | Except for attributes copied from the top level DIE in the "main" | |
619 | (or "stub") file in preparation for reading the DWO file | |
620 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
621 | Either there isn't a DWO file (in which case this is NULL and the point | |
622 | is moot), or there is and either we're not going to read it (in which | |
623 | case this is NULL) or there is and we are reading it (in which case this | |
624 | is non-NULL). */ | |
3019eac3 DE |
625 | struct dwo_unit *dwo_unit; |
626 | ||
627 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
628 | (zero is a valid value though). | |
1dbab08b | 629 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
630 | ULONGEST addr_base; |
631 | ||
2e3cf129 DE |
632 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
633 | (zero is a valid value though). | |
1dbab08b | 634 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 635 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
636 | be used without needing to know whether DWO files are in use or not. |
637 | N.B. This does not apply to DW_AT_ranges appearing in | |
638 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
639 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
640 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
641 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
642 | ULONGEST ranges_base; |
643 | ||
ae038cb0 DJ |
644 | /* Mark used when releasing cached dies. */ |
645 | unsigned int mark : 1; | |
646 | ||
8be455d7 JK |
647 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
648 | This test is imperfect as there may exist optimized debug code not using | |
649 | any location list and still facing inlining issues if handled as | |
650 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 651 | unsigned int has_loclist : 1; |
ba919b58 | 652 | |
1b80a9fa JK |
653 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
654 | if all the producer_is_* fields are valid. This information is cached | |
655 | because profiling CU expansion showed excessive time spent in | |
656 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
657 | unsigned int checked_producer : 1; |
658 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 659 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 660 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
661 | |
662 | /* When set, the file that we're processing is known to have | |
663 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
664 | this information, but later versions do. */ | |
665 | ||
666 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
667 | }; |
668 | ||
10b3939b DJ |
669 | /* Persistent data held for a compilation unit, even when not |
670 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 671 | read_symtab_private field of the psymtab. */ |
10b3939b | 672 | |
ae038cb0 DJ |
673 | struct dwarf2_per_cu_data |
674 | { | |
36586728 | 675 | /* The start offset and length of this compilation unit. |
45452591 | 676 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
677 | initial_length_size. |
678 | If the DIE refers to a DWO file, this is always of the original die, | |
679 | not the DWO file. */ | |
9c541725 | 680 | sect_offset sect_off; |
36586728 | 681 | unsigned int length; |
ae038cb0 | 682 | |
43988095 JK |
683 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
684 | short dwarf_version; | |
685 | ||
ae038cb0 DJ |
686 | /* Flag indicating this compilation unit will be read in before |
687 | any of the current compilation units are processed. */ | |
c764a876 | 688 | unsigned int queued : 1; |
ae038cb0 | 689 | |
0d99eb77 DE |
690 | /* This flag will be set when reading partial DIEs if we need to load |
691 | absolutely all DIEs for this compilation unit, instead of just the ones | |
692 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
693 | hash table and don't find it. */ |
694 | unsigned int load_all_dies : 1; | |
695 | ||
0186c6a7 DE |
696 | /* Non-zero if this CU is from .debug_types. |
697 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
698 | this is non-zero. */ | |
3019eac3 DE |
699 | unsigned int is_debug_types : 1; |
700 | ||
36586728 TT |
701 | /* Non-zero if this CU is from the .dwz file. */ |
702 | unsigned int is_dwz : 1; | |
703 | ||
a2ce51a0 DE |
704 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
705 | This flag is only valid if is_debug_types is true. | |
706 | We can't read a CU directly from a DWO file: There are required | |
707 | attributes in the stub. */ | |
708 | unsigned int reading_dwo_directly : 1; | |
709 | ||
7ee85ab1 DE |
710 | /* Non-zero if the TU has been read. |
711 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
712 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
713 | fetching them from random other DWOs (due to comdat folding). | |
714 | If the TU has already been read, the optimization is unnecessary | |
715 | (and unwise - we don't want to change where gdb thinks the TU lives | |
716 | "midflight"). | |
717 | This flag is only valid if is_debug_types is true. */ | |
718 | unsigned int tu_read : 1; | |
719 | ||
3019eac3 DE |
720 | /* The section this CU/TU lives in. |
721 | If the DIE refers to a DWO file, this is always the original die, | |
722 | not the DWO file. */ | |
8a0459fd | 723 | struct dwarf2_section_info *section; |
348e048f | 724 | |
17ea53c3 | 725 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
726 | of the CU cache it gets reset to NULL again. This is left as NULL for |
727 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 728 | struct dwarf2_cu *cu; |
1c379e20 | 729 | |
9cdd5dbd DE |
730 | /* The corresponding objfile. |
731 | Normally we can get the objfile from dwarf2_per_objfile. | |
732 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
733 | struct objfile *objfile; |
734 | ||
fffbe6a8 YQ |
735 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
736 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
737 | union |
738 | { | |
739 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 740 | or NULL for unread partial units. */ |
9291a0cd TT |
741 | struct partial_symtab *psymtab; |
742 | ||
743 | /* Data needed by the "quick" functions. */ | |
744 | struct dwarf2_per_cu_quick_data *quick; | |
745 | } v; | |
95554aad | 746 | |
796a7ff8 DE |
747 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
748 | while reading psymtabs, used to compute the psymtab dependencies, | |
749 | and then cleared. Then it is filled in again while reading full | |
750 | symbols, and only deleted when the objfile is destroyed. | |
751 | ||
752 | This is also used to work around a difference between the way gold | |
753 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
754 | is a gold bug. For symbols coming from TUs, gold records in the index | |
755 | the CU that includes the TU instead of the TU itself. This breaks | |
756 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
757 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
758 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
759 | we need to look in TU Z to find X. Fortunately, this is akin to | |
760 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
761 | .gdb_index version <=7 this also records the TUs that the CU referred | |
762 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
763 | indices so we only pay a price for gold generated indices. |
764 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 765 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
766 | }; |
767 | ||
348e048f DE |
768 | /* Entry in the signatured_types hash table. */ |
769 | ||
770 | struct signatured_type | |
771 | { | |
42e7ad6c | 772 | /* The "per_cu" object of this type. |
ac9ec31b | 773 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
774 | N.B.: This is the first member so that it's easy to convert pointers |
775 | between them. */ | |
776 | struct dwarf2_per_cu_data per_cu; | |
777 | ||
3019eac3 | 778 | /* The type's signature. */ |
348e048f DE |
779 | ULONGEST signature; |
780 | ||
3019eac3 | 781 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
782 | If this TU is a DWO stub and the definition lives in a DWO file |
783 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
784 | cu_offset type_offset_in_tu; |
785 | ||
786 | /* Offset in the section of the type's DIE. | |
787 | If the definition lives in a DWO file, this is the offset in the | |
788 | .debug_types.dwo section. | |
789 | The value is zero until the actual value is known. | |
790 | Zero is otherwise not a valid section offset. */ | |
791 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
792 | |
793 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
794 | can share them. This points to the containing symtab. */ | |
795 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
796 | |
797 | /* The type. | |
798 | The first time we encounter this type we fully read it in and install it | |
799 | in the symbol tables. Subsequent times we only need the type. */ | |
800 | struct type *type; | |
a2ce51a0 DE |
801 | |
802 | /* Containing DWO unit. | |
803 | This field is valid iff per_cu.reading_dwo_directly. */ | |
804 | struct dwo_unit *dwo_unit; | |
348e048f DE |
805 | }; |
806 | ||
0186c6a7 DE |
807 | typedef struct signatured_type *sig_type_ptr; |
808 | DEF_VEC_P (sig_type_ptr); | |
809 | ||
094b34ac DE |
810 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
811 | This includes type_unit_group and quick_file_names. */ | |
812 | ||
813 | struct stmt_list_hash | |
814 | { | |
815 | /* The DWO unit this table is from or NULL if there is none. */ | |
816 | struct dwo_unit *dwo_unit; | |
817 | ||
818 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 819 | sect_offset line_sect_off; |
094b34ac DE |
820 | }; |
821 | ||
f4dc4d17 DE |
822 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
823 | an object of this type. */ | |
824 | ||
825 | struct type_unit_group | |
826 | { | |
0186c6a7 | 827 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
828 | To simplify things we create an artificial CU that "includes" all the |
829 | type units using this stmt_list so that the rest of the code still has | |
830 | a "per_cu" handle on the symtab. | |
831 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 832 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
833 | struct dwarf2_per_cu_data per_cu; |
834 | ||
0186c6a7 DE |
835 | /* The TUs that share this DW_AT_stmt_list entry. |
836 | This is added to while parsing type units to build partial symtabs, | |
837 | and is deleted afterwards and not used again. */ | |
838 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 839 | |
43f3e411 | 840 | /* The compunit symtab. |
094b34ac | 841 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
842 | so we create an essentially anonymous symtab as the compunit symtab. */ |
843 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 844 | |
094b34ac DE |
845 | /* The data used to construct the hash key. */ |
846 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
847 | |
848 | /* The number of symtabs from the line header. | |
849 | The value here must match line_header.num_file_names. */ | |
850 | unsigned int num_symtabs; | |
851 | ||
852 | /* The symbol tables for this TU (obtained from the files listed in | |
853 | DW_AT_stmt_list). | |
854 | WARNING: The order of entries here must match the order of entries | |
855 | in the line header. After the first TU using this type_unit_group, the | |
856 | line header for the subsequent TUs is recreated from this. This is done | |
857 | because we need to use the same symtabs for each TU using the same | |
858 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
859 | there's no guarantee the line header doesn't have duplicate entries. */ | |
860 | struct symtab **symtabs; | |
861 | }; | |
862 | ||
73869dc2 | 863 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
864 | |
865 | struct dwo_sections | |
866 | { | |
867 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
868 | struct dwarf2_section_info line; |
869 | struct dwarf2_section_info loc; | |
43988095 | 870 | struct dwarf2_section_info loclists; |
09262596 DE |
871 | struct dwarf2_section_info macinfo; |
872 | struct dwarf2_section_info macro; | |
3019eac3 DE |
873 | struct dwarf2_section_info str; |
874 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
875 | /* In the case of a virtual DWO file, these two are unused. */ |
876 | struct dwarf2_section_info info; | |
3019eac3 DE |
877 | VEC (dwarf2_section_info_def) *types; |
878 | }; | |
879 | ||
c88ee1f0 | 880 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
881 | |
882 | struct dwo_unit | |
883 | { | |
884 | /* Backlink to the containing struct dwo_file. */ | |
885 | struct dwo_file *dwo_file; | |
886 | ||
887 | /* The "id" that distinguishes this CU/TU. | |
888 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
889 | Since signatures came first, we stick with it for consistency. */ | |
890 | ULONGEST signature; | |
891 | ||
892 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 893 | struct dwarf2_section_info *section; |
3019eac3 | 894 | |
9c541725 PA |
895 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
896 | sect_offset sect_off; | |
3019eac3 DE |
897 | unsigned int length; |
898 | ||
899 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
900 | cu_offset type_offset_in_tu; | |
901 | }; | |
902 | ||
73869dc2 DE |
903 | /* include/dwarf2.h defines the DWP section codes. |
904 | It defines a max value but it doesn't define a min value, which we | |
905 | use for error checking, so provide one. */ | |
906 | ||
907 | enum dwp_v2_section_ids | |
908 | { | |
909 | DW_SECT_MIN = 1 | |
910 | }; | |
911 | ||
80626a55 | 912 | /* Data for one DWO file. |
57d63ce2 DE |
913 | |
914 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
915 | appears in a DWP file). DWP files don't really have DWO files per se - | |
916 | comdat folding of types "loses" the DWO file they came from, and from | |
917 | a high level view DWP files appear to contain a mass of random types. | |
918 | However, to maintain consistency with the non-DWP case we pretend DWP | |
919 | files contain virtual DWO files, and we assign each TU with one virtual | |
920 | DWO file (generally based on the line and abbrev section offsets - | |
921 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
922 | |
923 | struct dwo_file | |
924 | { | |
0ac5b59e | 925 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
926 | For virtual DWO files the name is constructed from the section offsets |
927 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
928 | from related CU+TUs. */ | |
0ac5b59e DE |
929 | const char *dwo_name; |
930 | ||
931 | /* The DW_AT_comp_dir attribute. */ | |
932 | const char *comp_dir; | |
3019eac3 | 933 | |
80626a55 DE |
934 | /* The bfd, when the file is open. Otherwise this is NULL. |
935 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
936 | bfd *dbfd; | |
3019eac3 | 937 | |
73869dc2 DE |
938 | /* The sections that make up this DWO file. |
939 | Remember that for virtual DWO files in DWP V2, these are virtual | |
940 | sections (for lack of a better name). */ | |
3019eac3 DE |
941 | struct dwo_sections sections; |
942 | ||
33c5cd75 DB |
943 | /* The CUs in the file. |
944 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
945 | an extension to handle LLVM's Link Time Optimization output (where | |
946 | multiple source files may be compiled into a single object/dwo pair). */ | |
947 | htab_t cus; | |
3019eac3 DE |
948 | |
949 | /* Table of TUs in the file. | |
950 | Each element is a struct dwo_unit. */ | |
951 | htab_t tus; | |
952 | }; | |
953 | ||
80626a55 DE |
954 | /* These sections are what may appear in a DWP file. */ |
955 | ||
956 | struct dwp_sections | |
957 | { | |
73869dc2 | 958 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
959 | struct dwarf2_section_info str; |
960 | struct dwarf2_section_info cu_index; | |
961 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
962 | |
963 | /* These are only used by DWP version 2 files. | |
964 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
965 | sections are referenced by section number, and are not recorded here. | |
966 | In DWP version 2 there is at most one copy of all these sections, each | |
967 | section being (effectively) comprised of the concatenation of all of the | |
968 | individual sections that exist in the version 1 format. | |
969 | To keep the code simple we treat each of these concatenated pieces as a | |
970 | section itself (a virtual section?). */ | |
971 | struct dwarf2_section_info abbrev; | |
972 | struct dwarf2_section_info info; | |
973 | struct dwarf2_section_info line; | |
974 | struct dwarf2_section_info loc; | |
975 | struct dwarf2_section_info macinfo; | |
976 | struct dwarf2_section_info macro; | |
977 | struct dwarf2_section_info str_offsets; | |
978 | struct dwarf2_section_info types; | |
80626a55 DE |
979 | }; |
980 | ||
73869dc2 DE |
981 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
982 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 983 | |
73869dc2 | 984 | struct virtual_v1_dwo_sections |
80626a55 DE |
985 | { |
986 | struct dwarf2_section_info abbrev; | |
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 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 993 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
994 | struct dwarf2_section_info info_or_types; |
995 | }; | |
996 | ||
73869dc2 DE |
997 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
998 | In version 2, the sections of the DWO files are concatenated together | |
999 | and stored in one section of that name. Thus each ELF section contains | |
1000 | several "virtual" sections. */ | |
1001 | ||
1002 | struct virtual_v2_dwo_sections | |
1003 | { | |
1004 | bfd_size_type abbrev_offset; | |
1005 | bfd_size_type abbrev_size; | |
1006 | ||
1007 | bfd_size_type line_offset; | |
1008 | bfd_size_type line_size; | |
1009 | ||
1010 | bfd_size_type loc_offset; | |
1011 | bfd_size_type loc_size; | |
1012 | ||
1013 | bfd_size_type macinfo_offset; | |
1014 | bfd_size_type macinfo_size; | |
1015 | ||
1016 | bfd_size_type macro_offset; | |
1017 | bfd_size_type macro_size; | |
1018 | ||
1019 | bfd_size_type str_offsets_offset; | |
1020 | bfd_size_type str_offsets_size; | |
1021 | ||
1022 | /* Each DWP hash table entry records one CU or one TU. | |
1023 | That is recorded here, and copied to dwo_unit.section. */ | |
1024 | bfd_size_type info_or_types_offset; | |
1025 | bfd_size_type info_or_types_size; | |
1026 | }; | |
1027 | ||
80626a55 DE |
1028 | /* Contents of DWP hash tables. */ |
1029 | ||
1030 | struct dwp_hash_table | |
1031 | { | |
73869dc2 | 1032 | uint32_t version, nr_columns; |
80626a55 | 1033 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
1034 | const gdb_byte *hash_table, *unit_table; |
1035 | union | |
1036 | { | |
1037 | struct | |
1038 | { | |
1039 | const gdb_byte *indices; | |
1040 | } v1; | |
1041 | struct | |
1042 | { | |
1043 | /* This is indexed by column number and gives the id of the section | |
1044 | in that column. */ | |
1045 | #define MAX_NR_V2_DWO_SECTIONS \ | |
1046 | (1 /* .debug_info or .debug_types */ \ | |
1047 | + 1 /* .debug_abbrev */ \ | |
1048 | + 1 /* .debug_line */ \ | |
1049 | + 1 /* .debug_loc */ \ | |
1050 | + 1 /* .debug_str_offsets */ \ | |
1051 | + 1 /* .debug_macro or .debug_macinfo */) | |
1052 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
1053 | const gdb_byte *offsets; | |
1054 | const gdb_byte *sizes; | |
1055 | } v2; | |
1056 | } section_pool; | |
80626a55 DE |
1057 | }; |
1058 | ||
1059 | /* Data for one DWP file. */ | |
1060 | ||
1061 | struct dwp_file | |
1062 | { | |
1063 | /* Name of the file. */ | |
1064 | const char *name; | |
1065 | ||
73869dc2 DE |
1066 | /* File format version. */ |
1067 | int version; | |
1068 | ||
93417882 | 1069 | /* The bfd. */ |
80626a55 DE |
1070 | bfd *dbfd; |
1071 | ||
1072 | /* Section info for this file. */ | |
1073 | struct dwp_sections sections; | |
1074 | ||
57d63ce2 | 1075 | /* Table of CUs in the file. */ |
80626a55 DE |
1076 | const struct dwp_hash_table *cus; |
1077 | ||
1078 | /* Table of TUs in the file. */ | |
1079 | const struct dwp_hash_table *tus; | |
1080 | ||
19ac8c2e DE |
1081 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1082 | htab_t loaded_cus; | |
1083 | htab_t loaded_tus; | |
80626a55 | 1084 | |
73869dc2 DE |
1085 | /* Table to map ELF section numbers to their sections. |
1086 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1087 | unsigned int num_sections; |
1088 | asection **elf_sections; | |
1089 | }; | |
1090 | ||
36586728 TT |
1091 | /* This represents a '.dwz' file. */ |
1092 | ||
1093 | struct dwz_file | |
1094 | { | |
1095 | /* A dwz file can only contain a few sections. */ | |
1096 | struct dwarf2_section_info abbrev; | |
1097 | struct dwarf2_section_info info; | |
1098 | struct dwarf2_section_info str; | |
1099 | struct dwarf2_section_info line; | |
1100 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1101 | struct dwarf2_section_info gdb_index; |
36586728 TT |
1102 | |
1103 | /* The dwz's BFD. */ | |
1104 | bfd *dwz_bfd; | |
1105 | }; | |
1106 | ||
0963b4bd MS |
1107 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1108 | al. which are used for both .debug_info and .debug_types dies. | |
1109 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1110 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1111 | |
1112 | struct die_reader_specs | |
1113 | { | |
a32a8923 | 1114 | /* The bfd of die_section. */ |
93311388 DE |
1115 | bfd* abfd; |
1116 | ||
1117 | /* The CU of the DIE we are parsing. */ | |
1118 | struct dwarf2_cu *cu; | |
1119 | ||
80626a55 | 1120 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1121 | struct dwo_file *dwo_file; |
1122 | ||
dee91e82 | 1123 | /* The section the die comes from. |
3019eac3 | 1124 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1125 | struct dwarf2_section_info *die_section; |
1126 | ||
1127 | /* die_section->buffer. */ | |
d521ce57 | 1128 | const gdb_byte *buffer; |
f664829e DE |
1129 | |
1130 | /* The end of the buffer. */ | |
1131 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1132 | |
1133 | /* The value of the DW_AT_comp_dir attribute. */ | |
1134 | const char *comp_dir; | |
93311388 DE |
1135 | }; |
1136 | ||
fd820528 | 1137 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1138 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1139 | const gdb_byte *info_ptr, |
dee91e82 DE |
1140 | struct die_info *comp_unit_die, |
1141 | int has_children, | |
1142 | void *data); | |
1143 | ||
ecfb656c PA |
1144 | /* A 1-based directory index. This is a strong typedef to prevent |
1145 | accidentally using a directory index as a 0-based index into an | |
1146 | array/vector. */ | |
1147 | enum class dir_index : unsigned int {}; | |
1148 | ||
1149 | /* Likewise, a 1-based file name index. */ | |
1150 | enum class file_name_index : unsigned int {}; | |
1151 | ||
52059ffd TT |
1152 | struct file_entry |
1153 | { | |
fff8551c PA |
1154 | file_entry () = default; |
1155 | ||
ecfb656c | 1156 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1157 | unsigned int mod_time_, unsigned int length_) |
1158 | : name (name_), | |
ecfb656c | 1159 | d_index (d_index_), |
fff8551c PA |
1160 | mod_time (mod_time_), |
1161 | length (length_) | |
1162 | {} | |
1163 | ||
ecfb656c PA |
1164 | /* Return the include directory at D_INDEX stored in LH. Returns |
1165 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1166 | const char *include_dir (const line_header *lh) const; |
1167 | ||
fff8551c PA |
1168 | /* The file name. Note this is an observing pointer. The memory is |
1169 | owned by debug_line_buffer. */ | |
1170 | const char *name {}; | |
1171 | ||
8c43009f | 1172 | /* The directory index (1-based). */ |
ecfb656c | 1173 | dir_index d_index {}; |
fff8551c PA |
1174 | |
1175 | unsigned int mod_time {}; | |
1176 | ||
1177 | unsigned int length {}; | |
1178 | ||
1179 | /* True if referenced by the Line Number Program. */ | |
1180 | bool included_p {}; | |
1181 | ||
83769d0b | 1182 | /* The associated symbol table, if any. */ |
fff8551c | 1183 | struct symtab *symtab {}; |
52059ffd TT |
1184 | }; |
1185 | ||
debd256d JB |
1186 | /* The line number information for a compilation unit (found in the |
1187 | .debug_line section) begins with a "statement program header", | |
1188 | which contains the following information. */ | |
1189 | struct line_header | |
1190 | { | |
fff8551c PA |
1191 | line_header () |
1192 | : offset_in_dwz {} | |
1193 | {} | |
1194 | ||
1195 | /* Add an entry to the include directory table. */ | |
1196 | void add_include_dir (const char *include_dir); | |
1197 | ||
1198 | /* Add an entry to the file name table. */ | |
ecfb656c | 1199 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1200 | unsigned int mod_time, unsigned int length); |
1201 | ||
ecfb656c | 1202 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1203 | is out of bounds. */ |
ecfb656c | 1204 | const char *include_dir_at (dir_index index) const |
8c43009f | 1205 | { |
ecfb656c PA |
1206 | /* Convert directory index number (1-based) to vector index |
1207 | (0-based). */ | |
1208 | size_t vec_index = to_underlying (index) - 1; | |
1209 | ||
1210 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1211 | return NULL; |
ecfb656c | 1212 | return include_dirs[vec_index]; |
8c43009f PA |
1213 | } |
1214 | ||
ecfb656c | 1215 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1216 | is out of bounds. */ |
ecfb656c | 1217 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1218 | { |
ecfb656c PA |
1219 | /* Convert file name index number (1-based) to vector index |
1220 | (0-based). */ | |
1221 | size_t vec_index = to_underlying (index) - 1; | |
1222 | ||
1223 | if (vec_index >= file_names.size ()) | |
fff8551c | 1224 | return NULL; |
ecfb656c | 1225 | return &file_names[vec_index]; |
fff8551c PA |
1226 | } |
1227 | ||
1228 | /* Const version of the above. */ | |
1229 | const file_entry *file_name_at (unsigned int index) const | |
1230 | { | |
1231 | if (index >= file_names.size ()) | |
8c43009f PA |
1232 | return NULL; |
1233 | return &file_names[index]; | |
1234 | } | |
1235 | ||
527f3840 | 1236 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1237 | sect_offset sect_off {}; |
527f3840 JK |
1238 | |
1239 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1240 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1241 | ||
1242 | unsigned int total_length {}; | |
1243 | unsigned short version {}; | |
1244 | unsigned int header_length {}; | |
1245 | unsigned char minimum_instruction_length {}; | |
1246 | unsigned char maximum_ops_per_instruction {}; | |
1247 | unsigned char default_is_stmt {}; | |
1248 | int line_base {}; | |
1249 | unsigned char line_range {}; | |
1250 | unsigned char opcode_base {}; | |
debd256d JB |
1251 | |
1252 | /* standard_opcode_lengths[i] is the number of operands for the | |
1253 | standard opcode whose value is i. This means that | |
1254 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1255 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1256 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1257 | |
fff8551c PA |
1258 | /* The include_directories table. Note these are observing |
1259 | pointers. The memory is owned by debug_line_buffer. */ | |
1260 | std::vector<const char *> include_dirs; | |
debd256d | 1261 | |
fff8551c PA |
1262 | /* The file_names table. */ |
1263 | std::vector<file_entry> file_names; | |
debd256d JB |
1264 | |
1265 | /* The start and end of the statement program following this | |
6502dd73 | 1266 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1267 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1268 | }; |
c906108c | 1269 | |
fff8551c PA |
1270 | typedef std::unique_ptr<line_header> line_header_up; |
1271 | ||
8c43009f PA |
1272 | const char * |
1273 | file_entry::include_dir (const line_header *lh) const | |
1274 | { | |
ecfb656c | 1275 | return lh->include_dir_at (d_index); |
8c43009f PA |
1276 | } |
1277 | ||
c906108c | 1278 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1279 | need this much information. */ |
c906108c SS |
1280 | struct partial_die_info |
1281 | { | |
72bf9492 | 1282 | /* Offset of this DIE. */ |
9c541725 | 1283 | sect_offset sect_off; |
72bf9492 DJ |
1284 | |
1285 | /* DWARF-2 tag for this DIE. */ | |
1286 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1287 | ||
72bf9492 DJ |
1288 | /* Assorted flags describing the data found in this DIE. */ |
1289 | unsigned int has_children : 1; | |
1290 | unsigned int is_external : 1; | |
1291 | unsigned int is_declaration : 1; | |
1292 | unsigned int has_type : 1; | |
1293 | unsigned int has_specification : 1; | |
1294 | unsigned int has_pc_info : 1; | |
481860b3 | 1295 | unsigned int may_be_inlined : 1; |
72bf9492 | 1296 | |
0c1b455e TT |
1297 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1298 | unsigned int main_subprogram : 1; | |
1299 | ||
72bf9492 DJ |
1300 | /* Flag set if the SCOPE field of this structure has been |
1301 | computed. */ | |
1302 | unsigned int scope_set : 1; | |
1303 | ||
fa4028e9 JB |
1304 | /* Flag set if the DIE has a byte_size attribute. */ |
1305 | unsigned int has_byte_size : 1; | |
1306 | ||
ff908ebf AW |
1307 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1308 | unsigned int has_const_value : 1; | |
1309 | ||
98bfdba5 PA |
1310 | /* Flag set if any of the DIE's children are template arguments. */ |
1311 | unsigned int has_template_arguments : 1; | |
1312 | ||
abc72ce4 DE |
1313 | /* Flag set if fixup_partial_die has been called on this die. */ |
1314 | unsigned int fixup_called : 1; | |
1315 | ||
36586728 TT |
1316 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1317 | unsigned int is_dwz : 1; | |
1318 | ||
1319 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1320 | unsigned int spec_is_dwz : 1; | |
1321 | ||
72bf9492 | 1322 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1323 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1324 | const char *name; |
72bf9492 | 1325 | |
abc72ce4 DE |
1326 | /* The linkage name, if present. */ |
1327 | const char *linkage_name; | |
1328 | ||
72bf9492 DJ |
1329 | /* The scope to prepend to our children. This is generally |
1330 | allocated on the comp_unit_obstack, so will disappear | |
1331 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1332 | const char *scope; |
72bf9492 | 1333 | |
95554aad TT |
1334 | /* Some data associated with the partial DIE. The tag determines |
1335 | which field is live. */ | |
1336 | union | |
1337 | { | |
1338 | /* The location description associated with this DIE, if any. */ | |
1339 | struct dwarf_block *locdesc; | |
1340 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1341 | sect_offset sect_off; |
95554aad | 1342 | } d; |
72bf9492 DJ |
1343 | |
1344 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1345 | CORE_ADDR lowpc; |
1346 | CORE_ADDR highpc; | |
72bf9492 | 1347 | |
93311388 | 1348 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1349 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1350 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1351 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1352 | const gdb_byte *sibling; |
72bf9492 DJ |
1353 | |
1354 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1355 | DW_AT_specification (or DW_AT_abstract_origin or | |
1356 | DW_AT_extension). */ | |
b64f50a1 | 1357 | sect_offset spec_offset; |
72bf9492 DJ |
1358 | |
1359 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1360 | if any. */ | |
1361 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1362 | }; |
1363 | ||
0963b4bd | 1364 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1365 | struct abbrev_info |
1366 | { | |
1367 | unsigned int number; /* number identifying abbrev */ | |
1368 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1369 | unsigned short has_children; /* boolean */ |
1370 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1371 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1372 | struct abbrev_info *next; /* next in chain */ | |
1373 | }; | |
1374 | ||
1375 | struct attr_abbrev | |
1376 | { | |
9d25dd43 DE |
1377 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1378 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1379 | |
1380 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1381 | LONGEST implicit_const; | |
c906108c SS |
1382 | }; |
1383 | ||
433df2d4 DE |
1384 | /* Size of abbrev_table.abbrev_hash_table. */ |
1385 | #define ABBREV_HASH_SIZE 121 | |
1386 | ||
1387 | /* Top level data structure to contain an abbreviation table. */ | |
1388 | ||
1389 | struct abbrev_table | |
1390 | { | |
f4dc4d17 DE |
1391 | /* Where the abbrev table came from. |
1392 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1393 | sect_offset sect_off; |
433df2d4 DE |
1394 | |
1395 | /* Storage for the abbrev table. */ | |
1396 | struct obstack abbrev_obstack; | |
1397 | ||
1398 | /* Hash table of abbrevs. | |
1399 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1400 | It could be statically allocated, but the previous code didn't so we | |
1401 | don't either. */ | |
1402 | struct abbrev_info **abbrevs; | |
1403 | }; | |
1404 | ||
0963b4bd | 1405 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1406 | struct attribute |
1407 | { | |
9d25dd43 | 1408 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1409 | ENUM_BITFIELD(dwarf_form) form : 15; |
1410 | ||
1411 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1412 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1413 | here for better struct attribute alignment. */ | |
1414 | unsigned int string_is_canonical : 1; | |
1415 | ||
b60c80d6 DJ |
1416 | union |
1417 | { | |
15d034d0 | 1418 | const char *str; |
b60c80d6 | 1419 | struct dwarf_block *blk; |
43bbcdc2 PH |
1420 | ULONGEST unsnd; |
1421 | LONGEST snd; | |
b60c80d6 | 1422 | CORE_ADDR addr; |
ac9ec31b | 1423 | ULONGEST signature; |
b60c80d6 DJ |
1424 | } |
1425 | u; | |
1426 | }; | |
1427 | ||
0963b4bd | 1428 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1429 | struct die_info |
1430 | { | |
76815b17 DE |
1431 | /* DWARF-2 tag for this DIE. */ |
1432 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1433 | ||
1434 | /* Number of attributes */ | |
98bfdba5 PA |
1435 | unsigned char num_attrs; |
1436 | ||
1437 | /* True if we're presently building the full type name for the | |
1438 | type derived from this DIE. */ | |
1439 | unsigned char building_fullname : 1; | |
76815b17 | 1440 | |
adde2bff DE |
1441 | /* True if this die is in process. PR 16581. */ |
1442 | unsigned char in_process : 1; | |
1443 | ||
76815b17 DE |
1444 | /* Abbrev number */ |
1445 | unsigned int abbrev; | |
1446 | ||
93311388 | 1447 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1448 | sect_offset sect_off; |
78ba4af6 JB |
1449 | |
1450 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1451 | points to this die's parent; CHILD points to the first child of | |
1452 | this node; and all the children of a given node are chained | |
4950bc1c | 1453 | together via their SIBLING fields. */ |
639d11d3 DC |
1454 | struct die_info *child; /* Its first child, if any. */ |
1455 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1456 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1457 | |
b60c80d6 DJ |
1458 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1459 | zero, but it's not common and zero-sized arrays are not | |
1460 | sufficiently portable C. */ | |
1461 | struct attribute attrs[1]; | |
c906108c SS |
1462 | }; |
1463 | ||
0963b4bd | 1464 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1465 | |
1466 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1467 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1468 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1469 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1470 | #define DW_SND(attr) ((attr)->u.snd) | |
1471 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1472 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1473 | |
0963b4bd | 1474 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1475 | struct dwarf_block |
1476 | { | |
56eb65bd | 1477 | size_t size; |
1d6edc3c JK |
1478 | |
1479 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1480 | const gdb_byte *data; |
c906108c SS |
1481 | }; |
1482 | ||
c906108c SS |
1483 | #ifndef ATTR_ALLOC_CHUNK |
1484 | #define ATTR_ALLOC_CHUNK 4 | |
1485 | #endif | |
1486 | ||
c906108c SS |
1487 | /* Allocate fields for structs, unions and enums in this size. */ |
1488 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1489 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1490 | #endif | |
1491 | ||
c906108c SS |
1492 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1493 | but this would require a corresponding change in unpack_field_as_long | |
1494 | and friends. */ | |
1495 | static int bits_per_byte = 8; | |
1496 | ||
52059ffd TT |
1497 | struct nextfield |
1498 | { | |
1499 | struct nextfield *next; | |
1500 | int accessibility; | |
1501 | int virtuality; | |
1502 | struct field field; | |
1503 | }; | |
1504 | ||
1505 | struct nextfnfield | |
1506 | { | |
1507 | struct nextfnfield *next; | |
1508 | struct fn_field fnfield; | |
1509 | }; | |
1510 | ||
1511 | struct fnfieldlist | |
1512 | { | |
1513 | const char *name; | |
1514 | int length; | |
1515 | struct nextfnfield *head; | |
1516 | }; | |
1517 | ||
1518 | struct typedef_field_list | |
1519 | { | |
1520 | struct typedef_field field; | |
1521 | struct typedef_field_list *next; | |
1522 | }; | |
1523 | ||
c906108c SS |
1524 | /* The routines that read and process dies for a C struct or C++ class |
1525 | pass lists of data member fields and lists of member function fields | |
1526 | in an instance of a field_info structure, as defined below. */ | |
1527 | struct field_info | |
c5aa993b | 1528 | { |
0963b4bd | 1529 | /* List of data member and baseclasses fields. */ |
52059ffd | 1530 | struct nextfield *fields, *baseclasses; |
c906108c | 1531 | |
7d0ccb61 | 1532 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1533 | int nfields; |
c906108c | 1534 | |
c5aa993b JM |
1535 | /* Number of baseclasses. */ |
1536 | int nbaseclasses; | |
c906108c | 1537 | |
c5aa993b JM |
1538 | /* Set if the accesibility of one of the fields is not public. */ |
1539 | int non_public_fields; | |
c906108c | 1540 | |
c5aa993b JM |
1541 | /* Member function fieldlist array, contains name of possibly overloaded |
1542 | member function, number of overloaded member functions and a pointer | |
1543 | to the head of the member function field chain. */ | |
52059ffd | 1544 | struct fnfieldlist *fnfieldlists; |
c906108c | 1545 | |
c5aa993b JM |
1546 | /* Number of entries in the fnfieldlists array. */ |
1547 | int nfnfields; | |
98751a41 JK |
1548 | |
1549 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1550 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1551 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1552 | unsigned typedef_field_list_count; |
c5aa993b | 1553 | }; |
c906108c | 1554 | |
10b3939b DJ |
1555 | /* One item on the queue of compilation units to read in full symbols |
1556 | for. */ | |
1557 | struct dwarf2_queue_item | |
1558 | { | |
1559 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1560 | enum language pretend_language; |
10b3939b DJ |
1561 | struct dwarf2_queue_item *next; |
1562 | }; | |
1563 | ||
1564 | /* The current queue. */ | |
1565 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1566 | ||
ae038cb0 DJ |
1567 | /* Loaded secondary compilation units are kept in memory until they |
1568 | have not been referenced for the processing of this many | |
1569 | compilation units. Set this to zero to disable caching. Cache | |
1570 | sizes of up to at least twenty will improve startup time for | |
1571 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1572 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1573 | static void |
b4f54984 DE |
1574 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1575 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1576 | { |
3e43a32a | 1577 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1578 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1579 | value); |
1580 | } | |
4390d890 | 1581 | \f |
c906108c SS |
1582 | /* local function prototypes */ |
1583 | ||
a32a8923 DE |
1584 | static const char *get_section_name (const struct dwarf2_section_info *); |
1585 | ||
1586 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1587 | ||
918dd910 JK |
1588 | static void dwarf2_find_base_address (struct die_info *die, |
1589 | struct dwarf2_cu *cu); | |
1590 | ||
0018ea6f DE |
1591 | static struct partial_symtab *create_partial_symtab |
1592 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1593 | ||
f1902523 JK |
1594 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1595 | const gdb_byte *info_ptr, | |
1596 | struct die_info *type_unit_die, | |
1597 | int has_children, void *data); | |
1598 | ||
c67a9c90 | 1599 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1600 | |
72bf9492 DJ |
1601 | static void scan_partial_symbols (struct partial_die_info *, |
1602 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1603 | int, struct dwarf2_cu *); |
c906108c | 1604 | |
72bf9492 DJ |
1605 | static void add_partial_symbol (struct partial_die_info *, |
1606 | struct dwarf2_cu *); | |
63d06c5c | 1607 | |
72bf9492 DJ |
1608 | static void add_partial_namespace (struct partial_die_info *pdi, |
1609 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1610 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1611 | |
5d7cb8df | 1612 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1613 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1614 | struct dwarf2_cu *cu); |
1615 | ||
72bf9492 DJ |
1616 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1617 | struct dwarf2_cu *cu); | |
91c24f0a | 1618 | |
bc30ff58 JB |
1619 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1620 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1621 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1622 | |
257e7a09 YQ |
1623 | static void dwarf2_read_symtab (struct partial_symtab *, |
1624 | struct objfile *); | |
c906108c | 1625 | |
a14ed312 | 1626 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1627 | |
433df2d4 DE |
1628 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1629 | (const struct abbrev_table *, unsigned int); | |
1630 | ||
1631 | static struct abbrev_table *abbrev_table_read_table | |
1632 | (struct dwarf2_section_info *, sect_offset); | |
1633 | ||
1634 | static void abbrev_table_free (struct abbrev_table *); | |
1635 | ||
f4dc4d17 DE |
1636 | static void abbrev_table_free_cleanup (void *); |
1637 | ||
dee91e82 DE |
1638 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1639 | struct dwarf2_section_info *); | |
c906108c | 1640 | |
f3dd6933 | 1641 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1642 | |
d521ce57 | 1643 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1644 | |
dee91e82 | 1645 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1646 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1647 | |
d521ce57 TT |
1648 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1649 | struct partial_die_info *, | |
1650 | struct abbrev_info *, | |
1651 | unsigned int, | |
1652 | const gdb_byte *); | |
c906108c | 1653 | |
36586728 | 1654 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1655 | struct dwarf2_cu *); |
72bf9492 DJ |
1656 | |
1657 | static void fixup_partial_die (struct partial_die_info *, | |
1658 | struct dwarf2_cu *); | |
1659 | ||
d521ce57 TT |
1660 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1661 | struct attribute *, struct attr_abbrev *, | |
1662 | const gdb_byte *); | |
a8329558 | 1663 | |
a1855c1d | 1664 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1665 | |
a1855c1d | 1666 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1667 | |
a1855c1d | 1668 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1669 | |
a1855c1d | 1670 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1671 | |
a1855c1d | 1672 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1673 | |
d521ce57 | 1674 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1675 | unsigned int *); |
c906108c | 1676 | |
d521ce57 | 1677 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1678 | |
1679 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1680 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1681 | unsigned int *, unsigned int *); |
613e1657 | 1682 | |
d521ce57 TT |
1683 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1684 | const struct comp_unit_head *, | |
c764a876 DE |
1685 | unsigned int *); |
1686 | ||
d521ce57 | 1687 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1688 | |
f4dc4d17 DE |
1689 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1690 | sect_offset); | |
1691 | ||
d521ce57 | 1692 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1693 | |
d521ce57 | 1694 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1695 | |
d521ce57 TT |
1696 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1697 | const struct comp_unit_head *, | |
1698 | unsigned int *); | |
4bdf3d34 | 1699 | |
43988095 JK |
1700 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1701 | const struct comp_unit_head *, | |
1702 | unsigned int *); | |
36586728 | 1703 | |
43988095 | 1704 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1705 | |
d521ce57 | 1706 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1707 | |
d521ce57 TT |
1708 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1709 | const gdb_byte *, | |
3019eac3 DE |
1710 | unsigned int *); |
1711 | ||
d521ce57 | 1712 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1713 | ULONGEST str_index); |
3019eac3 | 1714 | |
e142c38c | 1715 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1716 | |
e142c38c DJ |
1717 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1718 | struct dwarf2_cu *); | |
c906108c | 1719 | |
348e048f | 1720 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1721 | unsigned int); |
348e048f | 1722 | |
7d45c7c3 KB |
1723 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1724 | struct dwarf2_cu *cu); | |
1725 | ||
05cf31d1 JB |
1726 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1727 | struct dwarf2_cu *cu); | |
1728 | ||
e142c38c | 1729 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1730 | |
e142c38c | 1731 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1732 | struct dwarf2_cu **); |
63d06c5c | 1733 | |
9c541725 | 1734 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1735 | struct dwarf2_cu *cu); |
debd256d | 1736 | |
f3f5162e | 1737 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1738 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1739 | CORE_ADDR, int decode_mapping); |
c906108c | 1740 | |
4d663531 | 1741 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1742 | |
43f3e411 DE |
1743 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1744 | const char *, const char *, | |
1745 | CORE_ADDR); | |
f4dc4d17 | 1746 | |
a14ed312 | 1747 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1748 | struct dwarf2_cu *); |
c906108c | 1749 | |
34eaf542 TT |
1750 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1751 | struct dwarf2_cu *, struct symbol *); | |
1752 | ||
ff39bb5e | 1753 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1754 | struct dwarf2_cu *); |
c906108c | 1755 | |
ff39bb5e | 1756 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1757 | struct type *type, |
1758 | const char *name, | |
1759 | struct obstack *obstack, | |
12df843f | 1760 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1761 | const gdb_byte **bytes, |
98bfdba5 | 1762 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1763 | |
e7c27a73 | 1764 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1765 | |
b4ba55a1 JB |
1766 | static int need_gnat_info (struct dwarf2_cu *); |
1767 | ||
3e43a32a MS |
1768 | static struct type *die_descriptive_type (struct die_info *, |
1769 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1770 | |
1771 | static void set_descriptive_type (struct type *, struct die_info *, | |
1772 | struct dwarf2_cu *); | |
1773 | ||
e7c27a73 DJ |
1774 | static struct type *die_containing_type (struct die_info *, |
1775 | struct dwarf2_cu *); | |
c906108c | 1776 | |
ff39bb5e | 1777 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1778 | struct dwarf2_cu *); |
c906108c | 1779 | |
f792889a | 1780 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1781 | |
673bfd45 DE |
1782 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1783 | ||
0d5cff50 | 1784 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1785 | |
6e70227d | 1786 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1787 | const char *suffix, int physname, |
1788 | struct dwarf2_cu *cu); | |
63d06c5c | 1789 | |
e7c27a73 | 1790 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1791 | |
348e048f DE |
1792 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1793 | ||
e7c27a73 | 1794 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1795 | |
e7c27a73 | 1796 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1797 | |
96408a79 SA |
1798 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1799 | ||
ff013f42 JK |
1800 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1801 | struct dwarf2_cu *, struct partial_symtab *); | |
1802 | ||
3a2b436a | 1803 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1804 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1805 | enum pc_bounds_kind |
1806 | { | |
e385593e | 1807 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1808 | PC_BOUNDS_NOT_PRESENT, |
1809 | ||
e385593e JK |
1810 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1811 | were present but they do not form a valid range of PC addresses. */ | |
1812 | PC_BOUNDS_INVALID, | |
1813 | ||
3a2b436a JK |
1814 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1815 | PC_BOUNDS_RANGES, | |
1816 | ||
1817 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1818 | PC_BOUNDS_HIGH_LOW, | |
1819 | }; | |
1820 | ||
1821 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1822 | CORE_ADDR *, CORE_ADDR *, | |
1823 | struct dwarf2_cu *, | |
1824 | struct partial_symtab *); | |
c906108c | 1825 | |
fae299cd DC |
1826 | static void get_scope_pc_bounds (struct die_info *, |
1827 | CORE_ADDR *, CORE_ADDR *, | |
1828 | struct dwarf2_cu *); | |
1829 | ||
801e3a5b JB |
1830 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1831 | CORE_ADDR, struct dwarf2_cu *); | |
1832 | ||
a14ed312 | 1833 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1834 | struct dwarf2_cu *); |
c906108c | 1835 | |
a14ed312 | 1836 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1837 | struct type *, struct dwarf2_cu *); |
c906108c | 1838 | |
a14ed312 | 1839 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1840 | struct die_info *, struct type *, |
e7c27a73 | 1841 | struct dwarf2_cu *); |
c906108c | 1842 | |
a14ed312 | 1843 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1844 | struct type *, |
1845 | struct dwarf2_cu *); | |
c906108c | 1846 | |
134d01f1 | 1847 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1848 | |
e7c27a73 | 1849 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1850 | |
e7c27a73 | 1851 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1852 | |
5d7cb8df JK |
1853 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1854 | ||
22cee43f PMR |
1855 | static struct using_direct **using_directives (enum language); |
1856 | ||
27aa8d6a SW |
1857 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1858 | ||
74921315 KS |
1859 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1860 | ||
f55ee35c JK |
1861 | static struct type *read_module_type (struct die_info *die, |
1862 | struct dwarf2_cu *cu); | |
1863 | ||
38d518c9 | 1864 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1865 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1866 | |
134d01f1 | 1867 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1868 | |
e7c27a73 | 1869 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1870 | |
6e70227d | 1871 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1872 | struct dwarf2_cu *); |
1873 | ||
bf6af496 | 1874 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1875 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1876 | struct die_info *); |
639d11d3 | 1877 | |
dee91e82 | 1878 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1879 | const gdb_byte *info_ptr, |
1880 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1881 | struct die_info *parent); |
1882 | ||
d521ce57 TT |
1883 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1884 | struct die_info **, const gdb_byte *, | |
1885 | int *, int); | |
3019eac3 | 1886 | |
d521ce57 TT |
1887 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1888 | struct die_info **, const gdb_byte *, | |
1889 | int *); | |
93311388 | 1890 | |
e7c27a73 | 1891 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1892 | |
15d034d0 TT |
1893 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1894 | struct obstack *); | |
71c25dea | 1895 | |
15d034d0 | 1896 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1897 | |
15d034d0 | 1898 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1899 | struct die_info *die, |
1900 | struct dwarf2_cu *cu); | |
1901 | ||
ca69b9e6 DE |
1902 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1903 | struct dwarf2_cu *cu); | |
1904 | ||
e142c38c | 1905 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1906 | struct dwarf2_cu **); |
9219021c | 1907 | |
f39c6ffd | 1908 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1909 | |
f39c6ffd | 1910 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1911 | |
f39c6ffd | 1912 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1913 | |
a121b7c1 | 1914 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1915 | |
f39c6ffd | 1916 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1917 | |
f9aca02d | 1918 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1919 | |
d97bc12b DE |
1920 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1921 | ||
1922 | static void dump_die_for_error (struct die_info *); | |
1923 | ||
1924 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1925 | struct die_info *); | |
c906108c | 1926 | |
d97bc12b | 1927 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1928 | |
51545339 | 1929 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1930 | struct dwarf2_cu *); |
c906108c | 1931 | |
ff39bb5e | 1932 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1933 | |
ff39bb5e | 1934 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1935 | |
348e048f | 1936 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1937 | const struct attribute *, |
348e048f DE |
1938 | struct dwarf2_cu **); |
1939 | ||
10b3939b | 1940 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1941 | const struct attribute *, |
f2f0e013 | 1942 | struct dwarf2_cu **); |
c906108c | 1943 | |
348e048f | 1944 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1945 | const struct attribute *, |
348e048f DE |
1946 | struct dwarf2_cu **); |
1947 | ||
ac9ec31b DE |
1948 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1949 | struct dwarf2_cu *); | |
1950 | ||
1951 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1952 | const struct attribute *, |
ac9ec31b DE |
1953 | struct dwarf2_cu *); |
1954 | ||
e5fe5e75 | 1955 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1956 | |
52dc124a | 1957 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1958 | |
63e43d3a PMR |
1959 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1960 | struct die_info *die, struct dwarf2_cu *cu, | |
1961 | struct dynamic_prop *prop); | |
1962 | ||
c906108c SS |
1963 | /* memory allocation interface */ |
1964 | ||
7b5a2f43 | 1965 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1966 | |
b60c80d6 | 1967 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1968 | |
43f3e411 | 1969 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1970 | |
6e5a29e1 | 1971 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1972 | |
6e5a29e1 | 1973 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1974 | |
6e5a29e1 | 1975 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1976 | |
6e5a29e1 | 1977 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1978 | |
8cf6f0b1 TT |
1979 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1980 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1981 | const struct attribute *attr); |
8cf6f0b1 | 1982 | |
ff39bb5e | 1983 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1984 | struct symbol *sym, |
f1e6e072 TT |
1985 | struct dwarf2_cu *cu, |
1986 | int is_block); | |
4c2df51b | 1987 | |
d521ce57 TT |
1988 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1989 | const gdb_byte *info_ptr, | |
1990 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1991 | |
72bf9492 DJ |
1992 | static void free_stack_comp_unit (void *); |
1993 | ||
72bf9492 DJ |
1994 | static hashval_t partial_die_hash (const void *item); |
1995 | ||
1996 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1997 | ||
ae038cb0 | 1998 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 1999 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 2000 | |
9816fde3 | 2001 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 2002 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
2003 | |
2004 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
2005 | struct die_info *comp_unit_die, |
2006 | enum language pretend_language); | |
93311388 | 2007 | |
68dc6402 | 2008 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
2009 | |
2010 | static void free_cached_comp_units (void *); | |
2011 | ||
2012 | static void age_cached_comp_units (void); | |
2013 | ||
dee91e82 | 2014 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 2015 | |
f792889a DJ |
2016 | static struct type *set_die_type (struct die_info *, struct type *, |
2017 | struct dwarf2_cu *); | |
1c379e20 | 2018 | |
ae038cb0 DJ |
2019 | static void create_all_comp_units (struct objfile *); |
2020 | ||
0e50663e | 2021 | static int create_all_type_units (struct objfile *); |
1fd400ff | 2022 | |
95554aad TT |
2023 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
2024 | enum language); | |
10b3939b | 2025 | |
95554aad TT |
2026 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
2027 | enum language); | |
10b3939b | 2028 | |
f4dc4d17 DE |
2029 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
2030 | enum language); | |
2031 | ||
10b3939b DJ |
2032 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
2033 | struct dwarf2_per_cu_data *); | |
2034 | ||
ae038cb0 DJ |
2035 | static void dwarf2_mark (struct dwarf2_cu *); |
2036 | ||
2037 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
2038 | ||
b64f50a1 | 2039 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 2040 | struct dwarf2_per_cu_data *); |
673bfd45 | 2041 | |
f792889a | 2042 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 2043 | |
9291a0cd TT |
2044 | static void dwarf2_release_queue (void *dummy); |
2045 | ||
95554aad TT |
2046 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
2047 | enum language pretend_language); | |
2048 | ||
a0f42c21 | 2049 | static void process_queue (void); |
9291a0cd | 2050 | |
d721ba37 PA |
2051 | /* The return type of find_file_and_directory. Note, the enclosed |
2052 | string pointers are only valid while this object is valid. */ | |
2053 | ||
2054 | struct file_and_directory | |
2055 | { | |
2056 | /* The filename. This is never NULL. */ | |
2057 | const char *name; | |
2058 | ||
2059 | /* The compilation directory. NULL if not known. If we needed to | |
2060 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2061 | points directly to the DW_AT_comp_dir string attribute owned by | |
2062 | the obstack that owns the DIE. */ | |
2063 | const char *comp_dir; | |
2064 | ||
2065 | /* If we needed to build a new string for comp_dir, this is what | |
2066 | owns the storage. */ | |
2067 | std::string comp_dir_storage; | |
2068 | }; | |
2069 | ||
2070 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2071 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2072 | |
2073 | static char *file_full_name (int file, struct line_header *lh, | |
2074 | const char *comp_dir); | |
2075 | ||
43988095 JK |
2076 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2077 | enum class rcuh_kind { COMPILE, TYPE }; | |
2078 | ||
d521ce57 | 2079 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2080 | (struct comp_unit_head *header, |
2081 | struct dwarf2_section_info *section, | |
d521ce57 | 2082 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2083 | rcuh_kind section_kind); |
36586728 | 2084 | |
fd820528 | 2085 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2086 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2087 | int use_existing_cu, int keep, | |
3019eac3 DE |
2088 | die_reader_func_ftype *die_reader_func, void *data); |
2089 | ||
dee91e82 DE |
2090 | static void init_cutu_and_read_dies_simple |
2091 | (struct dwarf2_per_cu_data *this_cu, | |
2092 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2093 | |
673bfd45 | 2094 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2095 | |
3019eac3 DE |
2096 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2097 | ||
57d63ce2 DE |
2098 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2099 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2100 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2101 | |
2102 | static struct dwp_file *get_dwp_file (void); | |
2103 | ||
3019eac3 | 2104 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2105 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2106 | |
2107 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2108 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2109 | |
89e63ee4 DE |
2110 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2111 | ||
3019eac3 DE |
2112 | static void free_dwo_file_cleanup (void *); |
2113 | ||
95554aad TT |
2114 | static void process_cu_includes (void); |
2115 | ||
1b80a9fa | 2116 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2117 | |
2118 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2119 | \f |
2120 | /* Various complaints about symbol reading that don't abort the process. */ | |
2121 | ||
2122 | static void | |
2123 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2124 | { | |
2125 | complaint (&symfile_complaints, | |
2126 | _("statement list doesn't fit in .debug_line section")); | |
2127 | } | |
2128 | ||
2129 | static void | |
2130 | dwarf2_debug_line_missing_file_complaint (void) | |
2131 | { | |
2132 | complaint (&symfile_complaints, | |
2133 | _(".debug_line section has line data without a file")); | |
2134 | } | |
2135 | ||
2136 | static void | |
2137 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2138 | { | |
2139 | complaint (&symfile_complaints, | |
2140 | _(".debug_line section has line " | |
2141 | "program sequence without an end")); | |
2142 | } | |
2143 | ||
2144 | static void | |
2145 | dwarf2_complex_location_expr_complaint (void) | |
2146 | { | |
2147 | complaint (&symfile_complaints, _("location expression too complex")); | |
2148 | } | |
2149 | ||
2150 | static void | |
2151 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2152 | int arg3) | |
2153 | { | |
2154 | complaint (&symfile_complaints, | |
2155 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2156 | arg1, arg2, arg3); | |
2157 | } | |
2158 | ||
2159 | static void | |
2160 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2161 | { | |
2162 | complaint (&symfile_complaints, | |
2163 | _("debug info runs off end of %s section" | |
2164 | " [in module %s]"), | |
a32a8923 DE |
2165 | get_section_name (section), |
2166 | get_section_file_name (section)); | |
4390d890 | 2167 | } |
1b80a9fa | 2168 | |
4390d890 DE |
2169 | static void |
2170 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2171 | { | |
2172 | complaint (&symfile_complaints, | |
2173 | _("macro debug info contains a " | |
2174 | "malformed macro definition:\n`%s'"), | |
2175 | arg1); | |
2176 | } | |
2177 | ||
2178 | static void | |
2179 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2180 | { | |
2181 | complaint (&symfile_complaints, | |
2182 | _("invalid attribute class or form for '%s' in '%s'"), | |
2183 | arg1, arg2); | |
2184 | } | |
527f3840 JK |
2185 | |
2186 | /* Hash function for line_header_hash. */ | |
2187 | ||
2188 | static hashval_t | |
2189 | line_header_hash (const struct line_header *ofs) | |
2190 | { | |
9c541725 | 2191 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2192 | } |
2193 | ||
2194 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2195 | ||
2196 | static hashval_t | |
2197 | line_header_hash_voidp (const void *item) | |
2198 | { | |
9a3c8263 | 2199 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2200 | |
2201 | return line_header_hash (ofs); | |
2202 | } | |
2203 | ||
2204 | /* Equality function for line_header_hash. */ | |
2205 | ||
2206 | static int | |
2207 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2208 | { | |
9a3c8263 SM |
2209 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2210 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2211 | |
9c541725 | 2212 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2213 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2214 | } | |
2215 | ||
4390d890 | 2216 | \f |
9291a0cd | 2217 | |
31aa7e4e JB |
2218 | /* Read the given attribute value as an address, taking the attribute's |
2219 | form into account. */ | |
2220 | ||
2221 | static CORE_ADDR | |
2222 | attr_value_as_address (struct attribute *attr) | |
2223 | { | |
2224 | CORE_ADDR addr; | |
2225 | ||
2226 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2227 | { | |
2228 | /* Aside from a few clearly defined exceptions, attributes that | |
2229 | contain an address must always be in DW_FORM_addr form. | |
2230 | Unfortunately, some compilers happen to be violating this | |
2231 | requirement by encoding addresses using other forms, such | |
2232 | as DW_FORM_data4 for example. For those broken compilers, | |
2233 | we try to do our best, without any guarantee of success, | |
2234 | to interpret the address correctly. It would also be nice | |
2235 | to generate a complaint, but that would require us to maintain | |
2236 | a list of legitimate cases where a non-address form is allowed, | |
2237 | as well as update callers to pass in at least the CU's DWARF | |
2238 | version. This is more overhead than what we're willing to | |
2239 | expand for a pretty rare case. */ | |
2240 | addr = DW_UNSND (attr); | |
2241 | } | |
2242 | else | |
2243 | addr = DW_ADDR (attr); | |
2244 | ||
2245 | return addr; | |
2246 | } | |
2247 | ||
9291a0cd TT |
2248 | /* The suffix for an index file. */ |
2249 | #define INDEX_SUFFIX ".gdb-index" | |
2250 | ||
330cdd98 PA |
2251 | /* See declaration. */ |
2252 | ||
2253 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2254 | const dwarf2_debug_sections *names) | |
2255 | : objfile (objfile_) | |
2256 | { | |
2257 | if (names == NULL) | |
2258 | names = &dwarf2_elf_names; | |
2259 | ||
2260 | bfd *obfd = objfile->obfd; | |
2261 | ||
2262 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2263 | locate_sections (obfd, sec, *names); | |
2264 | } | |
2265 | ||
2266 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2267 | { | |
2268 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2269 | free_cached_comp_units (); | |
2270 | ||
2271 | if (quick_file_names_table) | |
2272 | htab_delete (quick_file_names_table); | |
2273 | ||
2274 | if (line_header_hash) | |
2275 | htab_delete (line_header_hash); | |
2276 | ||
2277 | /* Everything else should be on the objfile obstack. */ | |
2278 | } | |
2279 | ||
2280 | /* See declaration. */ | |
2281 | ||
2282 | void | |
2283 | dwarf2_per_objfile::free_cached_comp_units () | |
2284 | { | |
2285 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2286 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2287 | while (per_cu != NULL) | |
2288 | { | |
2289 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2290 | ||
2291 | free_heap_comp_unit (per_cu->cu); | |
2292 | *last_chain = next_cu; | |
2293 | per_cu = next_cu; | |
2294 | } | |
2295 | } | |
2296 | ||
c906108c | 2297 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2298 | information and return true if we have enough to do something. |
2299 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2300 | ELF names are used. */ | |
c906108c SS |
2301 | |
2302 | int | |
251d32d9 TG |
2303 | dwarf2_has_info (struct objfile *objfile, |
2304 | const struct dwarf2_debug_sections *names) | |
c906108c | 2305 | { |
9a3c8263 SM |
2306 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2307 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2308 | if (!dwarf2_per_objfile) |
2309 | { | |
2310 | /* Initialize per-objfile state. */ | |
2311 | struct dwarf2_per_objfile *data | |
8d749320 | 2312 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2313 | |
330cdd98 PA |
2314 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2315 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2316 | } |
73869dc2 | 2317 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2318 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2319 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2320 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2321 | } |
2322 | ||
2323 | /* Return the containing section of virtual section SECTION. */ | |
2324 | ||
2325 | static struct dwarf2_section_info * | |
2326 | get_containing_section (const struct dwarf2_section_info *section) | |
2327 | { | |
2328 | gdb_assert (section->is_virtual); | |
2329 | return section->s.containing_section; | |
c906108c SS |
2330 | } |
2331 | ||
a32a8923 DE |
2332 | /* Return the bfd owner of SECTION. */ |
2333 | ||
2334 | static struct bfd * | |
2335 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2336 | { | |
73869dc2 DE |
2337 | if (section->is_virtual) |
2338 | { | |
2339 | section = get_containing_section (section); | |
2340 | gdb_assert (!section->is_virtual); | |
2341 | } | |
049412e3 | 2342 | return section->s.section->owner; |
a32a8923 DE |
2343 | } |
2344 | ||
2345 | /* Return the bfd section of SECTION. | |
2346 | Returns NULL if the section is not present. */ | |
2347 | ||
2348 | static asection * | |
2349 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2350 | { | |
73869dc2 DE |
2351 | if (section->is_virtual) |
2352 | { | |
2353 | section = get_containing_section (section); | |
2354 | gdb_assert (!section->is_virtual); | |
2355 | } | |
049412e3 | 2356 | return section->s.section; |
a32a8923 DE |
2357 | } |
2358 | ||
2359 | /* Return the name of SECTION. */ | |
2360 | ||
2361 | static const char * | |
2362 | get_section_name (const struct dwarf2_section_info *section) | |
2363 | { | |
2364 | asection *sectp = get_section_bfd_section (section); | |
2365 | ||
2366 | gdb_assert (sectp != NULL); | |
2367 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2368 | } | |
2369 | ||
2370 | /* Return the name of the file SECTION is in. */ | |
2371 | ||
2372 | static const char * | |
2373 | get_section_file_name (const struct dwarf2_section_info *section) | |
2374 | { | |
2375 | bfd *abfd = get_section_bfd_owner (section); | |
2376 | ||
2377 | return bfd_get_filename (abfd); | |
2378 | } | |
2379 | ||
2380 | /* Return the id of SECTION. | |
2381 | Returns 0 if SECTION doesn't exist. */ | |
2382 | ||
2383 | static int | |
2384 | get_section_id (const struct dwarf2_section_info *section) | |
2385 | { | |
2386 | asection *sectp = get_section_bfd_section (section); | |
2387 | ||
2388 | if (sectp == NULL) | |
2389 | return 0; | |
2390 | return sectp->id; | |
2391 | } | |
2392 | ||
2393 | /* Return the flags of SECTION. | |
73869dc2 | 2394 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2395 | |
2396 | static int | |
2397 | get_section_flags (const struct dwarf2_section_info *section) | |
2398 | { | |
2399 | asection *sectp = get_section_bfd_section (section); | |
2400 | ||
2401 | gdb_assert (sectp != NULL); | |
2402 | return bfd_get_section_flags (sectp->owner, sectp); | |
2403 | } | |
2404 | ||
251d32d9 TG |
2405 | /* When loading sections, we look either for uncompressed section or for |
2406 | compressed section names. */ | |
233a11ab CS |
2407 | |
2408 | static int | |
251d32d9 TG |
2409 | section_is_p (const char *section_name, |
2410 | const struct dwarf2_section_names *names) | |
233a11ab | 2411 | { |
251d32d9 TG |
2412 | if (names->normal != NULL |
2413 | && strcmp (section_name, names->normal) == 0) | |
2414 | return 1; | |
2415 | if (names->compressed != NULL | |
2416 | && strcmp (section_name, names->compressed) == 0) | |
2417 | return 1; | |
2418 | return 0; | |
233a11ab CS |
2419 | } |
2420 | ||
330cdd98 | 2421 | /* See declaration. */ |
c906108c | 2422 | |
330cdd98 PA |
2423 | void |
2424 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2425 | const dwarf2_debug_sections &names) | |
c906108c | 2426 | { |
dc7650b8 | 2427 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2428 | |
dc7650b8 JK |
2429 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2430 | { | |
2431 | } | |
330cdd98 | 2432 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2433 | { |
330cdd98 PA |
2434 | this->info.s.section = sectp; |
2435 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2436 | } |
330cdd98 | 2437 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2438 | { |
330cdd98 PA |
2439 | this->abbrev.s.section = sectp; |
2440 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2441 | } |
330cdd98 | 2442 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2443 | { |
330cdd98 PA |
2444 | this->line.s.section = sectp; |
2445 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2446 | } |
330cdd98 | 2447 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2448 | { |
330cdd98 PA |
2449 | this->loc.s.section = sectp; |
2450 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2451 | } |
330cdd98 | 2452 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2453 | { |
330cdd98 PA |
2454 | this->loclists.s.section = sectp; |
2455 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2456 | } |
330cdd98 | 2457 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2458 | { |
330cdd98 PA |
2459 | this->macinfo.s.section = sectp; |
2460 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2461 | } |
330cdd98 | 2462 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2463 | { |
330cdd98 PA |
2464 | this->macro.s.section = sectp; |
2465 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2466 | } |
330cdd98 | 2467 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2468 | { |
330cdd98 PA |
2469 | this->str.s.section = sectp; |
2470 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2471 | } |
330cdd98 | 2472 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2473 | { |
330cdd98 PA |
2474 | this->line_str.s.section = sectp; |
2475 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2476 | } |
330cdd98 | 2477 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2478 | { |
330cdd98 PA |
2479 | this->addr.s.section = sectp; |
2480 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2481 | } |
330cdd98 | 2482 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2483 | { |
330cdd98 PA |
2484 | this->frame.s.section = sectp; |
2485 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2486 | } |
330cdd98 | 2487 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2488 | { |
330cdd98 PA |
2489 | this->eh_frame.s.section = sectp; |
2490 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2491 | } |
330cdd98 | 2492 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2493 | { |
330cdd98 PA |
2494 | this->ranges.s.section = sectp; |
2495 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2496 | } |
330cdd98 | 2497 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2498 | { |
330cdd98 PA |
2499 | this->rnglists.s.section = sectp; |
2500 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2501 | } |
330cdd98 | 2502 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2503 | { |
8b70b953 TT |
2504 | struct dwarf2_section_info type_section; |
2505 | ||
2506 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2507 | type_section.s.section = sectp; |
8b70b953 TT |
2508 | type_section.size = bfd_get_section_size (sectp); |
2509 | ||
330cdd98 | 2510 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2511 | &type_section); |
348e048f | 2512 | } |
330cdd98 | 2513 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2514 | { |
330cdd98 PA |
2515 | this->gdb_index.s.section = sectp; |
2516 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2517 | } |
dce234bc | 2518 | |
b4e1fd61 | 2519 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2520 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2521 | this->has_section_at_zero = true; |
c906108c SS |
2522 | } |
2523 | ||
fceca515 DE |
2524 | /* A helper function that decides whether a section is empty, |
2525 | or not present. */ | |
9e0ac564 TT |
2526 | |
2527 | static int | |
19ac8c2e | 2528 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2529 | { |
73869dc2 DE |
2530 | if (section->is_virtual) |
2531 | return section->size == 0; | |
049412e3 | 2532 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2533 | } |
2534 | ||
3019eac3 DE |
2535 | /* Read the contents of the section INFO. |
2536 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2537 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2538 | of the DWO file. | |
dce234bc | 2539 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2540 | |
dce234bc PP |
2541 | static void |
2542 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2543 | { |
a32a8923 | 2544 | asection *sectp; |
3019eac3 | 2545 | bfd *abfd; |
dce234bc | 2546 | gdb_byte *buf, *retbuf; |
c906108c | 2547 | |
be391dca TT |
2548 | if (info->readin) |
2549 | return; | |
dce234bc | 2550 | info->buffer = NULL; |
be391dca | 2551 | info->readin = 1; |
188dd5d6 | 2552 | |
9e0ac564 | 2553 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2554 | return; |
c906108c | 2555 | |
a32a8923 | 2556 | sectp = get_section_bfd_section (info); |
3019eac3 | 2557 | |
73869dc2 DE |
2558 | /* If this is a virtual section we need to read in the real one first. */ |
2559 | if (info->is_virtual) | |
2560 | { | |
2561 | struct dwarf2_section_info *containing_section = | |
2562 | get_containing_section (info); | |
2563 | ||
2564 | gdb_assert (sectp != NULL); | |
2565 | if ((sectp->flags & SEC_RELOC) != 0) | |
2566 | { | |
2567 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2568 | " supported in section %s [in module %s]"), | |
2569 | get_section_name (info), get_section_file_name (info)); | |
2570 | } | |
2571 | dwarf2_read_section (objfile, containing_section); | |
2572 | /* Other code should have already caught virtual sections that don't | |
2573 | fit. */ | |
2574 | gdb_assert (info->virtual_offset + info->size | |
2575 | <= containing_section->size); | |
2576 | /* If the real section is empty or there was a problem reading the | |
2577 | section we shouldn't get here. */ | |
2578 | gdb_assert (containing_section->buffer != NULL); | |
2579 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2580 | return; | |
2581 | } | |
2582 | ||
4bf44c1c TT |
2583 | /* If the section has relocations, we must read it ourselves. |
2584 | Otherwise we attach it to the BFD. */ | |
2585 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2586 | { |
d521ce57 | 2587 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2588 | return; |
dce234bc | 2589 | } |
dce234bc | 2590 | |
224c3ddb | 2591 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2592 | info->buffer = buf; |
dce234bc PP |
2593 | |
2594 | /* When debugging .o files, we may need to apply relocations; see | |
2595 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2596 | We never compress sections in .o files, so we only need to | |
2597 | try this when the section is not compressed. */ | |
ac8035ab | 2598 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2599 | if (retbuf != NULL) |
2600 | { | |
2601 | info->buffer = retbuf; | |
2602 | return; | |
2603 | } | |
2604 | ||
a32a8923 DE |
2605 | abfd = get_section_bfd_owner (info); |
2606 | gdb_assert (abfd != NULL); | |
2607 | ||
dce234bc PP |
2608 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2609 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2610 | { |
2611 | error (_("Dwarf Error: Can't read DWARF data" | |
2612 | " in section %s [in module %s]"), | |
2613 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2614 | } | |
dce234bc PP |
2615 | } |
2616 | ||
9e0ac564 TT |
2617 | /* A helper function that returns the size of a section in a safe way. |
2618 | If you are positive that the section has been read before using the | |
2619 | size, then it is safe to refer to the dwarf2_section_info object's | |
2620 | "size" field directly. In other cases, you must call this | |
2621 | function, because for compressed sections the size field is not set | |
2622 | correctly until the section has been read. */ | |
2623 | ||
2624 | static bfd_size_type | |
2625 | dwarf2_section_size (struct objfile *objfile, | |
2626 | struct dwarf2_section_info *info) | |
2627 | { | |
2628 | if (!info->readin) | |
2629 | dwarf2_read_section (objfile, info); | |
2630 | return info->size; | |
2631 | } | |
2632 | ||
dce234bc | 2633 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2634 | SECTION_NAME. */ |
af34e669 | 2635 | |
dce234bc | 2636 | void |
3017a003 TG |
2637 | dwarf2_get_section_info (struct objfile *objfile, |
2638 | enum dwarf2_section_enum sect, | |
d521ce57 | 2639 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2640 | bfd_size_type *sizep) |
2641 | { | |
2642 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2643 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2644 | dwarf2_objfile_data_key); | |
dce234bc | 2645 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2646 | |
2647 | /* We may see an objfile without any DWARF, in which case we just | |
2648 | return nothing. */ | |
2649 | if (data == NULL) | |
2650 | { | |
2651 | *sectp = NULL; | |
2652 | *bufp = NULL; | |
2653 | *sizep = 0; | |
2654 | return; | |
2655 | } | |
3017a003 TG |
2656 | switch (sect) |
2657 | { | |
2658 | case DWARF2_DEBUG_FRAME: | |
2659 | info = &data->frame; | |
2660 | break; | |
2661 | case DWARF2_EH_FRAME: | |
2662 | info = &data->eh_frame; | |
2663 | break; | |
2664 | default: | |
2665 | gdb_assert_not_reached ("unexpected section"); | |
2666 | } | |
dce234bc | 2667 | |
9e0ac564 | 2668 | dwarf2_read_section (objfile, info); |
dce234bc | 2669 | |
a32a8923 | 2670 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2671 | *bufp = info->buffer; |
2672 | *sizep = info->size; | |
2673 | } | |
2674 | ||
36586728 TT |
2675 | /* A helper function to find the sections for a .dwz file. */ |
2676 | ||
2677 | static void | |
2678 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2679 | { | |
9a3c8263 | 2680 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2681 | |
2682 | /* Note that we only support the standard ELF names, because .dwz | |
2683 | is ELF-only (at the time of writing). */ | |
2684 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2685 | { | |
049412e3 | 2686 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2687 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2688 | } | |
2689 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2690 | { | |
049412e3 | 2691 | dwz_file->info.s.section = sectp; |
36586728 TT |
2692 | dwz_file->info.size = bfd_get_section_size (sectp); |
2693 | } | |
2694 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2695 | { | |
049412e3 | 2696 | dwz_file->str.s.section = sectp; |
36586728 TT |
2697 | dwz_file->str.size = bfd_get_section_size (sectp); |
2698 | } | |
2699 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2700 | { | |
049412e3 | 2701 | dwz_file->line.s.section = sectp; |
36586728 TT |
2702 | dwz_file->line.size = bfd_get_section_size (sectp); |
2703 | } | |
2704 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2705 | { | |
049412e3 | 2706 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2707 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2708 | } | |
2ec9a5e0 TT |
2709 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2710 | { | |
049412e3 | 2711 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2712 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2713 | } | |
36586728 TT |
2714 | } |
2715 | ||
4db1a1dc TT |
2716 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2717 | there is no .gnu_debugaltlink section in the file. Error if there | |
2718 | is such a section but the file cannot be found. */ | |
36586728 TT |
2719 | |
2720 | static struct dwz_file * | |
2721 | dwarf2_get_dwz_file (void) | |
2722 | { | |
36586728 TT |
2723 | const char *filename; |
2724 | struct dwz_file *result; | |
acd13123 | 2725 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2726 | size_t buildid_len; |
2727 | bfd_byte *buildid; | |
36586728 TT |
2728 | |
2729 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2730 | return dwarf2_per_objfile->dwz_file; | |
2731 | ||
4db1a1dc | 2732 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2733 | gdb::unique_xmalloc_ptr<char> data |
2734 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2735 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2736 | if (data == NULL) |
2737 | { | |
2738 | if (bfd_get_error () == bfd_error_no_error) | |
2739 | return NULL; | |
2740 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2741 | bfd_errmsg (bfd_get_error ())); | |
2742 | } | |
791afaa2 TT |
2743 | |
2744 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2745 | |
acd13123 TT |
2746 | buildid_len = (size_t) buildid_len_arg; |
2747 | ||
791afaa2 | 2748 | filename = data.get (); |
d721ba37 PA |
2749 | |
2750 | std::string abs_storage; | |
36586728 TT |
2751 | if (!IS_ABSOLUTE_PATH (filename)) |
2752 | { | |
14278e1f TT |
2753 | gdb::unique_xmalloc_ptr<char> abs |
2754 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2755 | |
14278e1f | 2756 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2757 | filename = abs_storage.c_str (); |
36586728 TT |
2758 | } |
2759 | ||
dc294be5 TT |
2760 | /* First try the file name given in the section. If that doesn't |
2761 | work, try to use the build-id instead. */ | |
192b62ce | 2762 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2763 | if (dwz_bfd != NULL) |
36586728 | 2764 | { |
192b62ce TT |
2765 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2766 | dwz_bfd.release (); | |
36586728 TT |
2767 | } |
2768 | ||
dc294be5 TT |
2769 | if (dwz_bfd == NULL) |
2770 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2771 | ||
2772 | if (dwz_bfd == NULL) | |
2773 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2774 | objfile_name (dwarf2_per_objfile->objfile)); | |
2775 | ||
36586728 TT |
2776 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2777 | struct dwz_file); | |
192b62ce | 2778 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2779 | |
192b62ce | 2780 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 | 2781 | |
192b62ce | 2782 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2783 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2784 | return result; |
2785 | } | |
9291a0cd | 2786 | \f |
7b9f3c50 DE |
2787 | /* DWARF quick_symbols_functions support. */ |
2788 | ||
2789 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2790 | unique line tables, so we maintain a separate table of all .debug_line | |
2791 | derived entries to support the sharing. | |
2792 | All the quick functions need is the list of file names. We discard the | |
2793 | line_header when we're done and don't need to record it here. */ | |
2794 | struct quick_file_names | |
2795 | { | |
094b34ac DE |
2796 | /* The data used to construct the hash key. */ |
2797 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2798 | |
2799 | /* The number of entries in file_names, real_names. */ | |
2800 | unsigned int num_file_names; | |
2801 | ||
2802 | /* The file names from the line table, after being run through | |
2803 | file_full_name. */ | |
2804 | const char **file_names; | |
2805 | ||
2806 | /* The file names from the line table after being run through | |
2807 | gdb_realpath. These are computed lazily. */ | |
2808 | const char **real_names; | |
2809 | }; | |
2810 | ||
2811 | /* When using the index (and thus not using psymtabs), each CU has an | |
2812 | object of this type. This is used to hold information needed by | |
2813 | the various "quick" methods. */ | |
2814 | struct dwarf2_per_cu_quick_data | |
2815 | { | |
2816 | /* The file table. This can be NULL if there was no file table | |
2817 | or it's currently not read in. | |
2818 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2819 | struct quick_file_names *file_names; | |
2820 | ||
2821 | /* The corresponding symbol table. This is NULL if symbols for this | |
2822 | CU have not yet been read. */ | |
43f3e411 | 2823 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2824 | |
2825 | /* A temporary mark bit used when iterating over all CUs in | |
2826 | expand_symtabs_matching. */ | |
2827 | unsigned int mark : 1; | |
2828 | ||
2829 | /* True if we've tried to read the file table and found there isn't one. | |
2830 | There will be no point in trying to read it again next time. */ | |
2831 | unsigned int no_file_data : 1; | |
2832 | }; | |
2833 | ||
094b34ac DE |
2834 | /* Utility hash function for a stmt_list_hash. */ |
2835 | ||
2836 | static hashval_t | |
2837 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2838 | { | |
2839 | hashval_t v = 0; | |
2840 | ||
2841 | if (stmt_list_hash->dwo_unit != NULL) | |
2842 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2843 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2844 | return v; |
2845 | } | |
2846 | ||
2847 | /* Utility equality function for a stmt_list_hash. */ | |
2848 | ||
2849 | static int | |
2850 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2851 | const struct stmt_list_hash *rhs) | |
2852 | { | |
2853 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2854 | return 0; | |
2855 | if (lhs->dwo_unit != NULL | |
2856 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2857 | return 0; | |
2858 | ||
9c541725 | 2859 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2860 | } |
2861 | ||
7b9f3c50 DE |
2862 | /* Hash function for a quick_file_names. */ |
2863 | ||
2864 | static hashval_t | |
2865 | hash_file_name_entry (const void *e) | |
2866 | { | |
9a3c8263 SM |
2867 | const struct quick_file_names *file_data |
2868 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2869 | |
094b34ac | 2870 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2871 | } |
2872 | ||
2873 | /* Equality function for a quick_file_names. */ | |
2874 | ||
2875 | static int | |
2876 | eq_file_name_entry (const void *a, const void *b) | |
2877 | { | |
9a3c8263 SM |
2878 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2879 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2880 | |
094b34ac | 2881 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2882 | } |
2883 | ||
2884 | /* Delete function for a quick_file_names. */ | |
2885 | ||
2886 | static void | |
2887 | delete_file_name_entry (void *e) | |
2888 | { | |
9a3c8263 | 2889 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2890 | int i; |
2891 | ||
2892 | for (i = 0; i < file_data->num_file_names; ++i) | |
2893 | { | |
2894 | xfree ((void*) file_data->file_names[i]); | |
2895 | if (file_data->real_names) | |
2896 | xfree ((void*) file_data->real_names[i]); | |
2897 | } | |
2898 | ||
2899 | /* The space for the struct itself lives on objfile_obstack, | |
2900 | so we don't free it here. */ | |
2901 | } | |
2902 | ||
2903 | /* Create a quick_file_names hash table. */ | |
2904 | ||
2905 | static htab_t | |
2906 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2907 | { | |
2908 | return htab_create_alloc (nr_initial_entries, | |
2909 | hash_file_name_entry, eq_file_name_entry, | |
2910 | delete_file_name_entry, xcalloc, xfree); | |
2911 | } | |
9291a0cd | 2912 | |
918dd910 JK |
2913 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2914 | have to be created afterwards. You should call age_cached_comp_units after | |
2915 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2916 | ||
2917 | static void | |
2918 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2919 | { | |
3019eac3 | 2920 | if (per_cu->is_debug_types) |
e5fe5e75 | 2921 | load_full_type_unit (per_cu); |
918dd910 | 2922 | else |
95554aad | 2923 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2924 | |
cc12ce38 DE |
2925 | if (per_cu->cu == NULL) |
2926 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2927 | |
2928 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2929 | } |
2930 | ||
a0f42c21 | 2931 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2932 | |
9291a0cd | 2933 | static void |
a0f42c21 | 2934 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2935 | { |
2936 | struct cleanup *back_to; | |
2937 | ||
f4dc4d17 DE |
2938 | /* Skip type_unit_groups, reading the type units they contain |
2939 | is handled elsewhere. */ | |
2940 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2941 | return; | |
2942 | ||
9291a0cd TT |
2943 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2944 | ||
95554aad | 2945 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2946 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2947 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2948 | { | |
2949 | queue_comp_unit (per_cu, language_minimal); | |
2950 | load_cu (per_cu); | |
89e63ee4 DE |
2951 | |
2952 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2953 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2954 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2955 | if (!per_cu->is_debug_types | |
cc12ce38 | 2956 | && per_cu->cu != NULL |
89e63ee4 DE |
2957 | && per_cu->cu->dwo_unit != NULL |
2958 | && dwarf2_per_objfile->index_table != NULL | |
2959 | && dwarf2_per_objfile->index_table->version <= 7 | |
2960 | /* DWP files aren't supported yet. */ | |
2961 | && get_dwp_file () == NULL) | |
2962 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2963 | } |
9291a0cd | 2964 | |
a0f42c21 | 2965 | process_queue (); |
9291a0cd TT |
2966 | |
2967 | /* Age the cache, releasing compilation units that have not | |
2968 | been used recently. */ | |
2969 | age_cached_comp_units (); | |
2970 | ||
2971 | do_cleanups (back_to); | |
2972 | } | |
2973 | ||
2974 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2975 | the objfile from which this CU came. Returns the resulting symbol | |
2976 | table. */ | |
2fdf6df6 | 2977 | |
43f3e411 | 2978 | static struct compunit_symtab * |
a0f42c21 | 2979 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2980 | { |
95554aad | 2981 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2982 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2983 | { |
2984 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 2985 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 2986 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2987 | process_cu_includes (); |
9291a0cd TT |
2988 | do_cleanups (back_to); |
2989 | } | |
f194fefb | 2990 | |
43f3e411 | 2991 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2992 | } |
2993 | ||
8832e7e3 | 2994 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2995 | |
2996 | This is intended for loops like: | |
2997 | ||
2998 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2999 | + dwarf2_per_objfile->n_type_units); ++i) | |
3000 | { | |
8832e7e3 | 3001 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
3002 | |
3003 | ...; | |
3004 | } | |
3005 | */ | |
2fdf6df6 | 3006 | |
1fd400ff | 3007 | static struct dwarf2_per_cu_data * |
8832e7e3 | 3008 | dw2_get_cutu (int index) |
1fd400ff TT |
3009 | { |
3010 | if (index >= dwarf2_per_objfile->n_comp_units) | |
3011 | { | |
f4dc4d17 | 3012 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
3013 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
3014 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
3015 | } |
3016 | ||
3017 | return dwarf2_per_objfile->all_comp_units[index]; | |
3018 | } | |
3019 | ||
8832e7e3 DE |
3020 | /* Return the CU given its index. |
3021 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
3022 | refers to a CU. */ | |
f4dc4d17 DE |
3023 | |
3024 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 3025 | dw2_get_cu (int index) |
f4dc4d17 | 3026 | { |
8832e7e3 | 3027 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 3028 | |
1fd400ff TT |
3029 | return dwarf2_per_objfile->all_comp_units[index]; |
3030 | } | |
3031 | ||
2ec9a5e0 TT |
3032 | /* A helper for create_cus_from_index that handles a given list of |
3033 | CUs. */ | |
2fdf6df6 | 3034 | |
74a0d9f6 | 3035 | static void |
2ec9a5e0 TT |
3036 | create_cus_from_index_list (struct objfile *objfile, |
3037 | const gdb_byte *cu_list, offset_type n_elements, | |
3038 | struct dwarf2_section_info *section, | |
3039 | int is_dwz, | |
3040 | int base_offset) | |
9291a0cd TT |
3041 | { |
3042 | offset_type i; | |
9291a0cd | 3043 | |
2ec9a5e0 | 3044 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3045 | { |
74a0d9f6 | 3046 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3047 | |
3048 | sect_offset sect_off | |
3049 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3050 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3051 | cu_list += 2 * 8; |
3052 | ||
9c541725 PA |
3053 | dwarf2_per_cu_data *the_cu |
3054 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3055 | struct dwarf2_per_cu_data); | |
3056 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3057 | the_cu->length = length; |
3058 | the_cu->objfile = objfile; | |
8a0459fd | 3059 | the_cu->section = section; |
9291a0cd TT |
3060 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3061 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3062 | the_cu->is_dwz = is_dwz; |
3063 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3064 | } |
9291a0cd TT |
3065 | } |
3066 | ||
2ec9a5e0 | 3067 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3068 | the CU objects for this objfile. */ |
2ec9a5e0 | 3069 | |
74a0d9f6 | 3070 | static void |
2ec9a5e0 TT |
3071 | create_cus_from_index (struct objfile *objfile, |
3072 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3073 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3074 | { | |
3075 | struct dwz_file *dwz; | |
3076 | ||
3077 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3078 | dwarf2_per_objfile->all_comp_units = |
3079 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3080 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3081 | |
74a0d9f6 JK |
3082 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3083 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3084 | |
3085 | if (dwz_elements == 0) | |
74a0d9f6 | 3086 | return; |
2ec9a5e0 TT |
3087 | |
3088 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3089 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3090 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3091 | } |
3092 | ||
1fd400ff | 3093 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3094 | |
74a0d9f6 | 3095 | static void |
673bfd45 | 3096 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3097 | struct dwarf2_section_info *section, |
673bfd45 DE |
3098 | const gdb_byte *bytes, |
3099 | offset_type elements) | |
1fd400ff TT |
3100 | { |
3101 | offset_type i; | |
673bfd45 | 3102 | htab_t sig_types_hash; |
1fd400ff | 3103 | |
6aa5f3a6 DE |
3104 | dwarf2_per_objfile->n_type_units |
3105 | = dwarf2_per_objfile->n_allocated_type_units | |
3106 | = elements / 3; | |
8d749320 SM |
3107 | dwarf2_per_objfile->all_type_units = |
3108 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3109 | |
673bfd45 | 3110 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3111 | |
3112 | for (i = 0; i < elements; i += 3) | |
3113 | { | |
52dc124a | 3114 | struct signatured_type *sig_type; |
9c541725 | 3115 | ULONGEST signature; |
1fd400ff | 3116 | void **slot; |
9c541725 | 3117 | cu_offset type_offset_in_tu; |
1fd400ff | 3118 | |
74a0d9f6 | 3119 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3120 | sect_offset sect_off |
3121 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3122 | type_offset_in_tu | |
3123 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3124 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3125 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3126 | bytes += 3 * 8; | |
3127 | ||
52dc124a | 3128 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3129 | struct signatured_type); |
52dc124a | 3130 | sig_type->signature = signature; |
9c541725 | 3131 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3132 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3133 | sig_type->per_cu.section = section; |
9c541725 | 3134 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3135 | sig_type->per_cu.objfile = objfile; |
3136 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3137 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3138 | struct dwarf2_per_cu_quick_data); | |
3139 | ||
52dc124a DE |
3140 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3141 | *slot = sig_type; | |
1fd400ff | 3142 | |
b4dd5633 | 3143 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3144 | } |
3145 | ||
673bfd45 | 3146 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3147 | } |
3148 | ||
9291a0cd TT |
3149 | /* Read the address map data from the mapped index, and use it to |
3150 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3151 | |
9291a0cd TT |
3152 | static void |
3153 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3154 | { | |
3e29f34a | 3155 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3156 | const gdb_byte *iter, *end; |
9291a0cd | 3157 | struct addrmap *mutable_map; |
9291a0cd TT |
3158 | CORE_ADDR baseaddr; |
3159 | ||
8268c778 PA |
3160 | auto_obstack temp_obstack; |
3161 | ||
9291a0cd TT |
3162 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3163 | ||
3164 | iter = index->address_table; | |
3165 | end = iter + index->address_table_size; | |
3166 | ||
3167 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3168 | ||
3169 | while (iter < end) | |
3170 | { | |
3171 | ULONGEST hi, lo, cu_index; | |
3172 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3173 | iter += 8; | |
3174 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3175 | iter += 8; | |
3176 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3177 | iter += 4; | |
f652bce2 | 3178 | |
24a55014 | 3179 | if (lo > hi) |
f652bce2 | 3180 | { |
24a55014 DE |
3181 | complaint (&symfile_complaints, |
3182 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3183 | hex_string (lo), hex_string (hi)); |
24a55014 | 3184 | continue; |
f652bce2 | 3185 | } |
24a55014 DE |
3186 | |
3187 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3188 | { |
3189 | complaint (&symfile_complaints, | |
3190 | _(".gdb_index address table has invalid CU number %u"), | |
3191 | (unsigned) cu_index); | |
24a55014 | 3192 | continue; |
f652bce2 | 3193 | } |
24a55014 | 3194 | |
3e29f34a MR |
3195 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3196 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3197 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3198 | } |
3199 | ||
3200 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3201 | &objfile->objfile_obstack); | |
9291a0cd TT |
3202 | } |
3203 | ||
59d7bcaf JK |
3204 | /* The hash function for strings in the mapped index. This is the same as |
3205 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3206 | implementation. This is necessary because the hash function is tied to the | |
3207 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3208 | SYMBOL_HASH_NEXT. |
3209 | ||
3210 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3211 | |
9291a0cd | 3212 | static hashval_t |
559a7a62 | 3213 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3214 | { |
3215 | const unsigned char *str = (const unsigned char *) p; | |
3216 | hashval_t r = 0; | |
3217 | unsigned char c; | |
3218 | ||
3219 | while ((c = *str++) != 0) | |
559a7a62 JK |
3220 | { |
3221 | if (index_version >= 5) | |
3222 | c = tolower (c); | |
3223 | r = r * 67 + c - 113; | |
3224 | } | |
9291a0cd TT |
3225 | |
3226 | return r; | |
3227 | } | |
3228 | ||
3229 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3230 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3231 | constant pool and return true. If NAME cannot be found, return |
3232 | false. */ | |
2fdf6df6 | 3233 | |
109483d9 | 3234 | static bool |
9291a0cd TT |
3235 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3236 | offset_type **vec_out) | |
3237 | { | |
0cf03b49 | 3238 | offset_type hash; |
9291a0cd | 3239 | offset_type slot, step; |
559a7a62 | 3240 | int (*cmp) (const char *, const char *); |
9291a0cd | 3241 | |
791afaa2 | 3242 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3243 | if (current_language->la_language == language_cplus |
45280282 IB |
3244 | || current_language->la_language == language_fortran |
3245 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3246 | { |
3247 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3248 | not contain any. */ | |
a8719064 | 3249 | |
72998fb3 | 3250 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3251 | { |
109483d9 | 3252 | without_params = cp_remove_params (name); |
0cf03b49 | 3253 | |
72998fb3 | 3254 | if (without_params != NULL) |
791afaa2 | 3255 | name = without_params.get (); |
0cf03b49 JK |
3256 | } |
3257 | } | |
3258 | ||
559a7a62 | 3259 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3260 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3261 | simulate our NAME being searched is also lowercased. */ |
3262 | hash = mapped_index_string_hash ((index->version == 4 | |
3263 | && case_sensitivity == case_sensitive_off | |
3264 | ? 5 : index->version), | |
3265 | name); | |
3266 | ||
3876f04e DE |
3267 | slot = hash & (index->symbol_table_slots - 1); |
3268 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3269 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3270 | |
3271 | for (;;) | |
3272 | { | |
3273 | /* Convert a slot number to an offset into the table. */ | |
3274 | offset_type i = 2 * slot; | |
3275 | const char *str; | |
3876f04e | 3276 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
109483d9 | 3277 | return false; |
9291a0cd | 3278 | |
3876f04e | 3279 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3280 | if (!cmp (name, str)) |
9291a0cd TT |
3281 | { |
3282 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3283 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
109483d9 | 3284 | return true; |
9291a0cd TT |
3285 | } |
3286 | ||
3876f04e | 3287 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3288 | } |
3289 | } | |
3290 | ||
2ec9a5e0 TT |
3291 | /* A helper function that reads the .gdb_index from SECTION and fills |
3292 | in MAP. FILENAME is the name of the file containing the section; | |
3293 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3294 | ok to use deprecated sections. | |
3295 | ||
3296 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3297 | out parameters that are filled in with information about the CU and | |
3298 | TU lists in the section. | |
3299 | ||
3300 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3301 | |
9291a0cd | 3302 | static int |
2ec9a5e0 TT |
3303 | read_index_from_section (struct objfile *objfile, |
3304 | const char *filename, | |
3305 | int deprecated_ok, | |
3306 | struct dwarf2_section_info *section, | |
3307 | struct mapped_index *map, | |
3308 | const gdb_byte **cu_list, | |
3309 | offset_type *cu_list_elements, | |
3310 | const gdb_byte **types_list, | |
3311 | offset_type *types_list_elements) | |
9291a0cd | 3312 | { |
948f8e3d | 3313 | const gdb_byte *addr; |
2ec9a5e0 | 3314 | offset_type version; |
b3b272e1 | 3315 | offset_type *metadata; |
1fd400ff | 3316 | int i; |
9291a0cd | 3317 | |
2ec9a5e0 | 3318 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3319 | return 0; |
82430852 JK |
3320 | |
3321 | /* Older elfutils strip versions could keep the section in the main | |
3322 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3323 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3324 | return 0; |
3325 | ||
2ec9a5e0 | 3326 | dwarf2_read_section (objfile, section); |
9291a0cd | 3327 | |
2ec9a5e0 | 3328 | addr = section->buffer; |
9291a0cd | 3329 | /* Version check. */ |
1fd400ff | 3330 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3331 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3332 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3333 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3334 | indices. */ |
831adc1f | 3335 | if (version < 4) |
481860b3 GB |
3336 | { |
3337 | static int warning_printed = 0; | |
3338 | if (!warning_printed) | |
3339 | { | |
3340 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3341 | filename); |
481860b3 GB |
3342 | warning_printed = 1; |
3343 | } | |
3344 | return 0; | |
3345 | } | |
3346 | /* Index version 4 uses a different hash function than index version | |
3347 | 5 and later. | |
3348 | ||
3349 | Versions earlier than 6 did not emit psymbols for inlined | |
3350 | functions. Using these files will cause GDB not to be able to | |
3351 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3352 | indices unless the user has done |
3353 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3354 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3355 | { |
3356 | static int warning_printed = 0; | |
3357 | if (!warning_printed) | |
3358 | { | |
e615022a DE |
3359 | warning (_("\ |
3360 | Skipping deprecated .gdb_index section in %s.\n\ | |
3361 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3362 | to use the section anyway."), | |
2ec9a5e0 | 3363 | filename); |
481860b3 GB |
3364 | warning_printed = 1; |
3365 | } | |
3366 | return 0; | |
3367 | } | |
796a7ff8 | 3368 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3369 | of the TU (for symbols coming from TUs), |
3370 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3371 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3372 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3373 | These are just performance bugs, and we can't distinguish gdb-generated | |
3374 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3375 | |
481860b3 | 3376 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3377 | longer backward compatible. */ |
796a7ff8 | 3378 | if (version > 8) |
594e8718 | 3379 | return 0; |
9291a0cd | 3380 | |
559a7a62 | 3381 | map->version = version; |
2ec9a5e0 | 3382 | map->total_size = section->size; |
9291a0cd TT |
3383 | |
3384 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3385 | |
3386 | i = 0; | |
2ec9a5e0 TT |
3387 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3388 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3389 | / 8); | |
1fd400ff TT |
3390 | ++i; |
3391 | ||
2ec9a5e0 TT |
3392 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3393 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3394 | - MAYBE_SWAP (metadata[i])) | |
3395 | / 8); | |
987d643c | 3396 | ++i; |
1fd400ff TT |
3397 | |
3398 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3399 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3400 | - MAYBE_SWAP (metadata[i])); | |
3401 | ++i; | |
3402 | ||
3876f04e DE |
3403 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3404 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3405 | - MAYBE_SWAP (metadata[i])) | |
3406 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3407 | ++i; |
9291a0cd | 3408 | |
f9d83a0b | 3409 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3410 | |
2ec9a5e0 TT |
3411 | return 1; |
3412 | } | |
3413 | ||
3414 | ||
3415 | /* Read the index file. If everything went ok, initialize the "quick" | |
3416 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3417 | ||
3418 | static int | |
3419 | dwarf2_read_index (struct objfile *objfile) | |
3420 | { | |
3421 | struct mapped_index local_map, *map; | |
3422 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3423 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3424 | struct dwz_file *dwz; |
2ec9a5e0 | 3425 | |
4262abfb | 3426 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3427 | use_deprecated_index_sections, |
3428 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3429 | &cu_list, &cu_list_elements, | |
3430 | &types_list, &types_list_elements)) | |
3431 | return 0; | |
3432 | ||
0fefef59 | 3433 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3434 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3435 | return 0; |
3436 | ||
2ec9a5e0 TT |
3437 | /* If there is a .dwz file, read it so we can get its CU list as |
3438 | well. */ | |
4db1a1dc TT |
3439 | dwz = dwarf2_get_dwz_file (); |
3440 | if (dwz != NULL) | |
2ec9a5e0 | 3441 | { |
2ec9a5e0 TT |
3442 | struct mapped_index dwz_map; |
3443 | const gdb_byte *dwz_types_ignore; | |
3444 | offset_type dwz_types_elements_ignore; | |
3445 | ||
3446 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3447 | 1, | |
3448 | &dwz->gdb_index, &dwz_map, | |
3449 | &dwz_list, &dwz_list_elements, | |
3450 | &dwz_types_ignore, | |
3451 | &dwz_types_elements_ignore)) | |
3452 | { | |
3453 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3454 | bfd_get_filename (dwz->dwz_bfd)); | |
3455 | return 0; | |
3456 | } | |
3457 | } | |
3458 | ||
74a0d9f6 JK |
3459 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3460 | dwz_list_elements); | |
1fd400ff | 3461 | |
8b70b953 TT |
3462 | if (types_list_elements) |
3463 | { | |
3464 | struct dwarf2_section_info *section; | |
3465 | ||
3466 | /* We can only handle a single .debug_types when we have an | |
3467 | index. */ | |
3468 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3469 | return 0; | |
3470 | ||
3471 | section = VEC_index (dwarf2_section_info_def, | |
3472 | dwarf2_per_objfile->types, 0); | |
3473 | ||
74a0d9f6 JK |
3474 | create_signatured_type_table_from_index (objfile, section, types_list, |
3475 | types_list_elements); | |
8b70b953 | 3476 | } |
9291a0cd | 3477 | |
2ec9a5e0 TT |
3478 | create_addrmap_from_index (objfile, &local_map); |
3479 | ||
8d749320 | 3480 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
3f563c84 | 3481 | map = new (map) mapped_index (); |
2ec9a5e0 | 3482 | *map = local_map; |
9291a0cd TT |
3483 | |
3484 | dwarf2_per_objfile->index_table = map; | |
3485 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3486 | dwarf2_per_objfile->quick_file_names_table = |
3487 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3488 | |
3489 | return 1; | |
3490 | } | |
3491 | ||
3492 | /* A helper for the "quick" functions which sets the global | |
3493 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3494 | |
9291a0cd TT |
3495 | static void |
3496 | dw2_setup (struct objfile *objfile) | |
3497 | { | |
9a3c8263 SM |
3498 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3499 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3500 | gdb_assert (dwarf2_per_objfile); |
3501 | } | |
3502 | ||
dee91e82 | 3503 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3504 | |
dee91e82 DE |
3505 | static void |
3506 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3507 | const gdb_byte *info_ptr, |
dee91e82 DE |
3508 | struct die_info *comp_unit_die, |
3509 | int has_children, | |
3510 | void *data) | |
9291a0cd | 3511 | { |
dee91e82 DE |
3512 | struct dwarf2_cu *cu = reader->cu; |
3513 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3514 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3515 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3516 | struct attribute *attr; |
dee91e82 | 3517 | int i; |
7b9f3c50 DE |
3518 | void **slot; |
3519 | struct quick_file_names *qfn; | |
9291a0cd | 3520 | |
0186c6a7 DE |
3521 | gdb_assert (! this_cu->is_debug_types); |
3522 | ||
07261596 TT |
3523 | /* Our callers never want to match partial units -- instead they |
3524 | will match the enclosing full CU. */ | |
3525 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3526 | { | |
3527 | this_cu->v.quick->no_file_data = 1; | |
3528 | return; | |
3529 | } | |
3530 | ||
0186c6a7 | 3531 | lh_cu = this_cu; |
7b9f3c50 | 3532 | slot = NULL; |
dee91e82 | 3533 | |
fff8551c | 3534 | line_header_up lh; |
9c541725 | 3535 | sect_offset line_offset {}; |
fff8551c | 3536 | |
dee91e82 | 3537 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3538 | if (attr) |
3539 | { | |
7b9f3c50 DE |
3540 | struct quick_file_names find_entry; |
3541 | ||
9c541725 | 3542 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3543 | |
3544 | /* We may have already read in this line header (TU line header sharing). | |
3545 | If we have we're done. */ | |
094b34ac | 3546 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3547 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3548 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3549 | &find_entry, INSERT); | |
3550 | if (*slot != NULL) | |
3551 | { | |
9a3c8263 | 3552 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3553 | return; |
7b9f3c50 DE |
3554 | } |
3555 | ||
3019eac3 | 3556 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3557 | } |
3558 | if (lh == NULL) | |
3559 | { | |
094b34ac | 3560 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3561 | return; |
9291a0cd TT |
3562 | } |
3563 | ||
8d749320 | 3564 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3565 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3566 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3567 | gdb_assert (slot != NULL); |
3568 | *slot = qfn; | |
9291a0cd | 3569 | |
d721ba37 | 3570 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3571 | |
fff8551c | 3572 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3573 | qfn->file_names = |
fff8551c PA |
3574 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3575 | for (i = 0; i < lh->file_names.size (); ++i) | |
3576 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3577 | qfn->real_names = NULL; |
9291a0cd | 3578 | |
094b34ac | 3579 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3580 | } |
3581 | ||
3582 | /* A helper for the "quick" functions which attempts to read the line | |
3583 | table for THIS_CU. */ | |
3584 | ||
3585 | static struct quick_file_names * | |
e4a48d9d | 3586 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3587 | { |
0186c6a7 DE |
3588 | /* This should never be called for TUs. */ |
3589 | gdb_assert (! this_cu->is_debug_types); | |
3590 | /* Nor type unit groups. */ | |
3591 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3592 | |
dee91e82 DE |
3593 | if (this_cu->v.quick->file_names != NULL) |
3594 | return this_cu->v.quick->file_names; | |
3595 | /* If we know there is no line data, no point in looking again. */ | |
3596 | if (this_cu->v.quick->no_file_data) | |
3597 | return NULL; | |
3598 | ||
0186c6a7 | 3599 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3600 | |
3601 | if (this_cu->v.quick->no_file_data) | |
3602 | return NULL; | |
3603 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3604 | } |
3605 | ||
3606 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3607 | real path for a given file name from the line table. */ |
2fdf6df6 | 3608 | |
9291a0cd | 3609 | static const char * |
7b9f3c50 DE |
3610 | dw2_get_real_path (struct objfile *objfile, |
3611 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3612 | { |
7b9f3c50 DE |
3613 | if (qfn->real_names == NULL) |
3614 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3615 | qfn->num_file_names, const char *); |
9291a0cd | 3616 | |
7b9f3c50 | 3617 | if (qfn->real_names[index] == NULL) |
14278e1f | 3618 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3619 | |
7b9f3c50 | 3620 | return qfn->real_names[index]; |
9291a0cd TT |
3621 | } |
3622 | ||
3623 | static struct symtab * | |
3624 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3625 | { | |
43f3e411 | 3626 | struct compunit_symtab *cust; |
9291a0cd | 3627 | int index; |
ae2de4f8 | 3628 | |
9291a0cd TT |
3629 | dw2_setup (objfile); |
3630 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3631 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3632 | if (cust == NULL) | |
3633 | return NULL; | |
3634 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3635 | } |
3636 | ||
7b9f3c50 DE |
3637 | /* Traversal function for dw2_forget_cached_source_info. */ |
3638 | ||
3639 | static int | |
3640 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3641 | { |
7b9f3c50 | 3642 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3643 | |
7b9f3c50 | 3644 | if (file_data->real_names) |
9291a0cd | 3645 | { |
7b9f3c50 | 3646 | int i; |
9291a0cd | 3647 | |
7b9f3c50 | 3648 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3649 | { |
7b9f3c50 DE |
3650 | xfree ((void*) file_data->real_names[i]); |
3651 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3652 | } |
3653 | } | |
7b9f3c50 DE |
3654 | |
3655 | return 1; | |
3656 | } | |
3657 | ||
3658 | static void | |
3659 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3660 | { | |
3661 | dw2_setup (objfile); | |
3662 | ||
3663 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3664 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3665 | } |
3666 | ||
f8eba3c6 TT |
3667 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3668 | the symtabs and calls the iterator. */ | |
3669 | ||
3670 | static int | |
3671 | dw2_map_expand_apply (struct objfile *objfile, | |
3672 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3673 | const char *name, const char *real_path, |
14bc53a8 | 3674 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3675 | { |
43f3e411 | 3676 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3677 | |
3678 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3679 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3680 | return 0; |
3681 | ||
3682 | /* This may expand more than one symtab, and we want to iterate over | |
3683 | all of them. */ | |
a0f42c21 | 3684 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3685 | |
14bc53a8 PA |
3686 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3687 | last_made, callback); | |
f8eba3c6 TT |
3688 | } |
3689 | ||
3690 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3691 | ||
14bc53a8 PA |
3692 | static bool |
3693 | dw2_map_symtabs_matching_filename | |
3694 | (struct objfile *objfile, const char *name, const char *real_path, | |
3695 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3696 | { |
3697 | int i; | |
c011a4f4 | 3698 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3699 | |
3700 | dw2_setup (objfile); | |
ae2de4f8 | 3701 | |
848e3e78 DE |
3702 | /* The rule is CUs specify all the files, including those used by |
3703 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3704 | |
848e3e78 | 3705 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3706 | { |
3707 | int j; | |
8832e7e3 | 3708 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3709 | struct quick_file_names *file_data; |
9291a0cd | 3710 | |
3d7bb9d9 | 3711 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3712 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3713 | continue; |
3714 | ||
e4a48d9d | 3715 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3716 | if (file_data == NULL) |
9291a0cd TT |
3717 | continue; |
3718 | ||
7b9f3c50 | 3719 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3720 | { |
7b9f3c50 | 3721 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3722 | const char *this_real_name; |
9291a0cd | 3723 | |
af529f8f | 3724 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3725 | { |
f5b95b50 | 3726 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3727 | callback)) |
3728 | return true; | |
288e77a7 | 3729 | continue; |
4aac40c8 | 3730 | } |
9291a0cd | 3731 | |
c011a4f4 DE |
3732 | /* Before we invoke realpath, which can get expensive when many |
3733 | files are involved, do a quick comparison of the basenames. */ | |
3734 | if (! basenames_may_differ | |
3735 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3736 | continue; | |
3737 | ||
da235a7c JK |
3738 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3739 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3740 | { |
da235a7c | 3741 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3742 | callback)) |
3743 | return true; | |
288e77a7 | 3744 | continue; |
da235a7c | 3745 | } |
9291a0cd | 3746 | |
da235a7c JK |
3747 | if (real_path != NULL) |
3748 | { | |
af529f8f JK |
3749 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3750 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3751 | if (this_real_name != NULL |
af529f8f | 3752 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3753 | { |
f5b95b50 | 3754 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3755 | callback)) |
3756 | return true; | |
288e77a7 | 3757 | continue; |
9291a0cd TT |
3758 | } |
3759 | } | |
3760 | } | |
3761 | } | |
3762 | ||
14bc53a8 | 3763 | return false; |
9291a0cd TT |
3764 | } |
3765 | ||
da51c347 DE |
3766 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3767 | ||
3768 | struct dw2_symtab_iterator | |
9291a0cd | 3769 | { |
da51c347 DE |
3770 | /* The internalized form of .gdb_index. */ |
3771 | struct mapped_index *index; | |
3772 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3773 | int want_specific_block; | |
3774 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3775 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3776 | int block_index; | |
3777 | /* The kind of symbol we're looking for. */ | |
3778 | domain_enum domain; | |
3779 | /* The list of CUs from the index entry of the symbol, | |
3780 | or NULL if not found. */ | |
3781 | offset_type *vec; | |
3782 | /* The next element in VEC to look at. */ | |
3783 | int next; | |
3784 | /* The number of elements in VEC, or zero if there is no match. */ | |
3785 | int length; | |
8943b874 DE |
3786 | /* Have we seen a global version of the symbol? |
3787 | If so we can ignore all further global instances. | |
3788 | This is to work around gold/15646, inefficient gold-generated | |
3789 | indices. */ | |
3790 | int global_seen; | |
da51c347 | 3791 | }; |
9291a0cd | 3792 | |
da51c347 DE |
3793 | /* Initialize the index symtab iterator ITER. |
3794 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3795 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3796 | |
9291a0cd | 3797 | static void |
da51c347 DE |
3798 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3799 | struct mapped_index *index, | |
3800 | int want_specific_block, | |
3801 | int block_index, | |
3802 | domain_enum domain, | |
3803 | const char *name) | |
3804 | { | |
3805 | iter->index = index; | |
3806 | iter->want_specific_block = want_specific_block; | |
3807 | iter->block_index = block_index; | |
3808 | iter->domain = domain; | |
3809 | iter->next = 0; | |
8943b874 | 3810 | iter->global_seen = 0; |
da51c347 DE |
3811 | |
3812 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3813 | iter->length = MAYBE_SWAP (*iter->vec); | |
3814 | else | |
3815 | { | |
3816 | iter->vec = NULL; | |
3817 | iter->length = 0; | |
3818 | } | |
3819 | } | |
3820 | ||
3821 | /* Return the next matching CU or NULL if there are no more. */ | |
3822 | ||
3823 | static struct dwarf2_per_cu_data * | |
3824 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3825 | { | |
3826 | for ( ; iter->next < iter->length; ++iter->next) | |
3827 | { | |
3828 | offset_type cu_index_and_attrs = | |
3829 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3830 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3831 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3832 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3833 | /* This value is only valid for index versions >= 7. */ | |
3834 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3835 | gdb_index_symbol_kind symbol_kind = | |
3836 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3837 | /* Only check the symbol attributes if they're present. | |
3838 | Indices prior to version 7 don't record them, | |
3839 | and indices >= 7 may elide them for certain symbols | |
3840 | (gold does this). */ | |
3841 | int attrs_valid = | |
3842 | (iter->index->version >= 7 | |
3843 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3844 | ||
3190f0c6 DE |
3845 | /* Don't crash on bad data. */ |
3846 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3847 | + dwarf2_per_objfile->n_type_units)) | |
3848 | { | |
3849 | complaint (&symfile_complaints, | |
3850 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3851 | " [in module %s]"), |
3852 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3853 | continue; |
3854 | } | |
3855 | ||
8832e7e3 | 3856 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3857 | |
da51c347 | 3858 | /* Skip if already read in. */ |
43f3e411 | 3859 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3860 | continue; |
3861 | ||
8943b874 DE |
3862 | /* Check static vs global. */ |
3863 | if (attrs_valid) | |
3864 | { | |
3865 | if (iter->want_specific_block | |
3866 | && want_static != is_static) | |
3867 | continue; | |
3868 | /* Work around gold/15646. */ | |
3869 | if (!is_static && iter->global_seen) | |
3870 | continue; | |
3871 | if (!is_static) | |
3872 | iter->global_seen = 1; | |
3873 | } | |
da51c347 DE |
3874 | |
3875 | /* Only check the symbol's kind if it has one. */ | |
3876 | if (attrs_valid) | |
3877 | { | |
3878 | switch (iter->domain) | |
3879 | { | |
3880 | case VAR_DOMAIN: | |
3881 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3882 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3883 | /* Some types are also in VAR_DOMAIN. */ | |
3884 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3885 | continue; | |
3886 | break; | |
3887 | case STRUCT_DOMAIN: | |
3888 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3889 | continue; | |
3890 | break; | |
3891 | case LABEL_DOMAIN: | |
3892 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3893 | continue; | |
3894 | break; | |
3895 | default: | |
3896 | break; | |
3897 | } | |
3898 | } | |
3899 | ||
3900 | ++iter->next; | |
3901 | return per_cu; | |
3902 | } | |
3903 | ||
3904 | return NULL; | |
3905 | } | |
3906 | ||
43f3e411 | 3907 | static struct compunit_symtab * |
da51c347 DE |
3908 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3909 | const char *name, domain_enum domain) | |
9291a0cd | 3910 | { |
43f3e411 | 3911 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3912 | struct mapped_index *index; |
3913 | ||
9291a0cd TT |
3914 | dw2_setup (objfile); |
3915 | ||
b5ec771e PA |
3916 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3917 | ||
156942c7 DE |
3918 | index = dwarf2_per_objfile->index_table; |
3919 | ||
da51c347 | 3920 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3921 | if (index) |
9291a0cd | 3922 | { |
da51c347 DE |
3923 | struct dw2_symtab_iterator iter; |
3924 | struct dwarf2_per_cu_data *per_cu; | |
3925 | ||
3926 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3927 | |
da51c347 | 3928 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3929 | { |
b2e2f908 | 3930 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3931 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3932 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3933 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3934 | |
b2e2f908 DE |
3935 | sym = block_find_symbol (block, name, domain, |
3936 | block_find_non_opaque_type_preferred, | |
3937 | &with_opaque); | |
3938 | ||
da51c347 DE |
3939 | /* Some caution must be observed with overloaded functions |
3940 | and methods, since the index will not contain any overload | |
3941 | information (but NAME might contain it). */ | |
da51c347 | 3942 | |
b2e2f908 | 3943 | if (sym != NULL |
b5ec771e | 3944 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
b2e2f908 DE |
3945 | return stab; |
3946 | if (with_opaque != NULL | |
b5ec771e | 3947 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
b2e2f908 | 3948 | stab_best = stab; |
da51c347 DE |
3949 | |
3950 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3951 | } |
3952 | } | |
9291a0cd | 3953 | |
da51c347 | 3954 | return stab_best; |
9291a0cd TT |
3955 | } |
3956 | ||
3957 | static void | |
3958 | dw2_print_stats (struct objfile *objfile) | |
3959 | { | |
e4a48d9d | 3960 | int i, total, count; |
9291a0cd TT |
3961 | |
3962 | dw2_setup (objfile); | |
e4a48d9d | 3963 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3964 | count = 0; |
e4a48d9d | 3965 | for (i = 0; i < total; ++i) |
9291a0cd | 3966 | { |
8832e7e3 | 3967 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3968 | |
43f3e411 | 3969 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3970 | ++count; |
3971 | } | |
e4a48d9d | 3972 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3973 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3974 | } | |
3975 | ||
779bd270 DE |
3976 | /* This dumps minimal information about the index. |
3977 | It is called via "mt print objfiles". | |
3978 | One use is to verify .gdb_index has been loaded by the | |
3979 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3980 | ||
9291a0cd TT |
3981 | static void |
3982 | dw2_dump (struct objfile *objfile) | |
3983 | { | |
779bd270 DE |
3984 | dw2_setup (objfile); |
3985 | gdb_assert (dwarf2_per_objfile->using_index); | |
3986 | printf_filtered (".gdb_index:"); | |
3987 | if (dwarf2_per_objfile->index_table != NULL) | |
3988 | { | |
3989 | printf_filtered (" version %d\n", | |
3990 | dwarf2_per_objfile->index_table->version); | |
3991 | } | |
3992 | else | |
3993 | printf_filtered (" faked for \"readnow\"\n"); | |
3994 | printf_filtered ("\n"); | |
9291a0cd TT |
3995 | } |
3996 | ||
3997 | static void | |
3189cb12 DE |
3998 | dw2_relocate (struct objfile *objfile, |
3999 | const struct section_offsets *new_offsets, | |
4000 | const struct section_offsets *delta) | |
9291a0cd TT |
4001 | { |
4002 | /* There's nothing to relocate here. */ | |
4003 | } | |
4004 | ||
4005 | static void | |
4006 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4007 | const char *func_name) | |
4008 | { | |
da51c347 DE |
4009 | struct mapped_index *index; |
4010 | ||
4011 | dw2_setup (objfile); | |
4012 | ||
4013 | index = dwarf2_per_objfile->index_table; | |
4014 | ||
4015 | /* index is NULL if OBJF_READNOW. */ | |
4016 | if (index) | |
4017 | { | |
4018 | struct dw2_symtab_iterator iter; | |
4019 | struct dwarf2_per_cu_data *per_cu; | |
4020 | ||
4021 | /* Note: It doesn't matter what we pass for block_index here. */ | |
4022 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
4023 | func_name); | |
4024 | ||
4025 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
4026 | dw2_instantiate_symtab (per_cu); | |
4027 | } | |
9291a0cd TT |
4028 | } |
4029 | ||
4030 | static void | |
4031 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4032 | { | |
4033 | int i; | |
4034 | ||
4035 | dw2_setup (objfile); | |
1fd400ff TT |
4036 | |
4037 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4038 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4039 | { |
8832e7e3 | 4040 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4041 | |
a0f42c21 | 4042 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4043 | } |
4044 | } | |
4045 | ||
4046 | static void | |
652a8996 JK |
4047 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4048 | const char *fullname) | |
9291a0cd TT |
4049 | { |
4050 | int i; | |
4051 | ||
4052 | dw2_setup (objfile); | |
d4637a04 DE |
4053 | |
4054 | /* We don't need to consider type units here. | |
4055 | This is only called for examining code, e.g. expand_line_sal. | |
4056 | There can be an order of magnitude (or more) more type units | |
4057 | than comp units, and we avoid them if we can. */ | |
4058 | ||
4059 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4060 | { |
4061 | int j; | |
8832e7e3 | 4062 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4063 | struct quick_file_names *file_data; |
9291a0cd | 4064 | |
3d7bb9d9 | 4065 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4066 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4067 | continue; |
4068 | ||
e4a48d9d | 4069 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4070 | if (file_data == NULL) |
9291a0cd TT |
4071 | continue; |
4072 | ||
7b9f3c50 | 4073 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4074 | { |
652a8996 JK |
4075 | const char *this_fullname = file_data->file_names[j]; |
4076 | ||
4077 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4078 | { |
a0f42c21 | 4079 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4080 | break; |
4081 | } | |
4082 | } | |
4083 | } | |
4084 | } | |
4085 | ||
9291a0cd | 4086 | static void |
ade7ed9e | 4087 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4088 | const char * name, domain_enum domain, |
ade7ed9e | 4089 | int global, |
40658b94 PH |
4090 | int (*callback) (struct block *, |
4091 | struct symbol *, void *), | |
b5ec771e | 4092 | void *data, symbol_name_match_type match, |
2edb89d3 | 4093 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4094 | { |
40658b94 | 4095 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4096 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4097 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4098 | } |
4099 | ||
b5ec771e PA |
4100 | /* Symbol name matcher for .gdb_index names. |
4101 | ||
4102 | Symbol names in .gdb_index have a few particularities: | |
4103 | ||
4104 | - There's no indication of which is the language of each symbol. | |
4105 | ||
4106 | Since each language has its own symbol name matching algorithm, | |
4107 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4108 | each symbol against all languages. This would be a potential |
4109 | performance problem if it were not mitigated by the | |
4110 | mapped_index::name_components lookup table, which significantly | |
4111 | reduces the number of times we need to call into this matcher, | |
4112 | making it a non-issue. | |
b5ec771e PA |
4113 | |
4114 | - Symbol names in the index have no overload (parameter) | |
4115 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4116 | appear as "foo" in the index, for example. | |
4117 | ||
4118 | This means that the lookup names passed to the symbol name | |
4119 | matcher functions must have no parameter information either | |
4120 | because (e.g.) symbol search name "foo" does not match | |
4121 | lookup-name "foo(int)" [while swapping search name for lookup | |
4122 | name would match]. | |
4123 | */ | |
4124 | class gdb_index_symbol_name_matcher | |
4125 | { | |
4126 | public: | |
4127 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4128 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4129 | ||
4130 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4131 | Returns true if any matcher matches. */ | |
4132 | bool matches (const char *symbol_name); | |
4133 | ||
4134 | private: | |
4135 | /* A reference to the lookup name we're matching against. */ | |
4136 | const lookup_name_info &m_lookup_name; | |
4137 | ||
4138 | /* A vector holding all the different symbol name matchers, for all | |
4139 | languages. */ | |
4140 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4141 | }; | |
4142 | ||
4143 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4144 | (const lookup_name_info &lookup_name) | |
4145 | : m_lookup_name (lookup_name) | |
4146 | { | |
4147 | /* Prepare the vector of comparison functions upfront, to avoid | |
4148 | doing the same work for each symbol. Care is taken to avoid | |
4149 | matching with the same matcher more than once if/when multiple | |
4150 | languages use the same matcher function. */ | |
4151 | auto &matchers = m_symbol_name_matcher_funcs; | |
4152 | matchers.reserve (nr_languages); | |
4153 | ||
4154 | matchers.push_back (default_symbol_name_matcher); | |
4155 | ||
4156 | for (int i = 0; i < nr_languages; i++) | |
4157 | { | |
4158 | const language_defn *lang = language_def ((enum language) i); | |
4159 | if (lang->la_get_symbol_name_matcher != NULL) | |
4160 | { | |
4161 | symbol_name_matcher_ftype *name_matcher | |
4162 | = lang->la_get_symbol_name_matcher (m_lookup_name); | |
4163 | ||
4164 | /* Don't insert the same comparison routine more than once. | |
4165 | Note that we do this linear walk instead of a cheaper | |
4166 | sorted insert, or use a std::set or something like that, | |
4167 | because relative order of function addresses is not | |
4168 | stable. This is not a problem in practice because the | |
4169 | number of supported languages is low, and the cost here | |
4170 | is tiny compared to the number of searches we'll do | |
4171 | afterwards using this object. */ | |
4172 | if (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4173 | == matchers.end ()) | |
4174 | matchers.push_back (name_matcher); | |
4175 | } | |
4176 | } | |
4177 | } | |
4178 | ||
4179 | bool | |
4180 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4181 | { | |
4182 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4183 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4184 | return true; | |
4185 | ||
4186 | return false; | |
4187 | } | |
4188 | ||
3f563c84 PA |
4189 | /* Helper for dw2_expand_symtabs_matching that works with a |
4190 | mapped_index instead of the containing objfile. This is split to a | |
4191 | separate function in order to be able to unit test the | |
4192 | name_components matching using a mock mapped_index. For each | |
4193 | symbol name that matches, calls MATCH_CALLBACK, passing it the | |
4194 | symbol's index in the mapped_index symbol table. */ | |
61d96d7e | 4195 | |
3f563c84 PA |
4196 | static void |
4197 | dw2_expand_symtabs_matching_symbol | |
4198 | (mapped_index &index, | |
c62446b1 | 4199 | const lookup_name_info &lookup_name_in, |
3f563c84 PA |
4200 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
4201 | enum search_domain kind, | |
4202 | gdb::function_view<void (offset_type)> match_callback) | |
4203 | { | |
c62446b1 PA |
4204 | lookup_name_info lookup_name_without_params |
4205 | = lookup_name_in.make_ignore_params (); | |
3f563c84 | 4206 | gdb_index_symbol_name_matcher lookup_name_matcher |
c62446b1 | 4207 | (lookup_name_without_params); |
3f563c84 PA |
4208 | |
4209 | auto *name_cmp = case_sensitivity == case_sensitive_on ? strcmp : strcasecmp; | |
4210 | ||
4211 | /* Build the symbol name component sorted vector, if we haven't yet. | |
4212 | The code below only knows how to break apart components of C++ | |
4213 | symbol names (and other languages that use '::' as | |
4214 | namespace/module separator). If we add support for wild matching | |
4215 | to some language that uses some other operator (E.g., Ada, Go and | |
4216 | D use '.'), then we'll need to try splitting the symbol name | |
4217 | according to that language too. Note that Ada does support wild | |
4218 | matching, but doesn't currently support .gdb_index. */ | |
4219 | if (index.name_components.empty ()) | |
4220 | { | |
4221 | for (size_t iter = 0; iter < index.symbol_table_slots; ++iter) | |
4222 | { | |
4223 | offset_type idx = 2 * iter; | |
4224 | ||
4225 | if (index.symbol_table[idx] == 0 | |
4226 | && index.symbol_table[idx + 1] == 0) | |
4227 | continue; | |
4228 | ||
4229 | const char *name = index.symbol_name_at (idx); | |
4230 | ||
4231 | /* Add each name component to the name component table. */ | |
4232 | unsigned int previous_len = 0; | |
4233 | for (unsigned int current_len = cp_find_first_component (name); | |
4234 | name[current_len] != '\0'; | |
4235 | current_len += cp_find_first_component (name + current_len)) | |
4236 | { | |
4237 | gdb_assert (name[current_len] == ':'); | |
4238 | index.name_components.push_back ({previous_len, idx}); | |
4239 | /* Skip the '::'. */ | |
4240 | current_len += 2; | |
4241 | previous_len = current_len; | |
4242 | } | |
4243 | index.name_components.push_back ({previous_len, idx}); | |
4244 | } | |
9291a0cd | 4245 | |
3f563c84 PA |
4246 | /* Sort name_components elements by name. */ |
4247 | auto name_comp_compare = [&] (const name_component &left, | |
4248 | const name_component &right) | |
4249 | { | |
4250 | const char *left_qualified = index.symbol_name_at (left.idx); | |
4251 | const char *right_qualified = index.symbol_name_at (right.idx); | |
4252 | ||
4253 | const char *left_name = left_qualified + left.name_offset; | |
4254 | const char *right_name = right_qualified + right.name_offset; | |
4255 | ||
4256 | return name_cmp (left_name, right_name) < 0; | |
4257 | }; | |
4258 | ||
4259 | std::sort (index.name_components.begin (), | |
4260 | index.name_components.end (), | |
4261 | name_comp_compare); | |
4262 | } | |
4263 | ||
4264 | const char *cplus | |
c62446b1 | 4265 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4266 | |
3f563c84 PA |
4267 | /* Comparison function object for lower_bound that matches against a |
4268 | given symbol name. */ | |
4269 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4270 | const char *name) | |
4271 | { | |
4272 | const char *elem_qualified = index.symbol_name_at (elem.idx); | |
4273 | const char *elem_name = elem_qualified + elem.name_offset; | |
4274 | return name_cmp (elem_name, name) < 0; | |
4275 | }; | |
4276 | ||
4277 | /* Comparison function object for upper_bound that matches against a | |
4278 | given symbol name. */ | |
4279 | auto lookup_compare_upper = [&] (const char *name, | |
4280 | const name_component &elem) | |
4281 | { | |
4282 | const char *elem_qualified = index.symbol_name_at (elem.idx); | |
4283 | const char *elem_name = elem_qualified + elem.name_offset; | |
4284 | return name_cmp (name, elem_name) < 0; | |
4285 | }; | |
4286 | ||
4287 | auto begin = index.name_components.begin (); | |
4288 | auto end = index.name_components.end (); | |
4289 | ||
4290 | /* Find the lower bound. */ | |
4291 | auto lower = [&] () | |
4292 | { | |
c62446b1 | 4293 | if (lookup_name_in.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4294 | return begin; |
4295 | else | |
4296 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4297 | } (); | |
4298 | ||
4299 | /* Find the upper bound. */ | |
4300 | auto upper = [&] () | |
4301 | { | |
c62446b1 | 4302 | if (lookup_name_in.completion_mode ()) |
3f563c84 PA |
4303 | { |
4304 | /* The string frobbing below won't work if the string is | |
4305 | empty. We don't need it then, anyway -- if we're | |
4306 | completing an empty string, then we want to iterate over | |
4307 | the whole range. */ | |
4308 | if (cplus[0] == '\0') | |
4309 | return end; | |
4310 | ||
4311 | /* In completion mode, increment the last character because | |
4312 | we want UPPER to point past all symbols names that have | |
4313 | the same prefix. */ | |
4314 | std::string after = cplus; | |
4315 | ||
4316 | gdb_assert (after.back () != 0xff); | |
4317 | after.back ()++; | |
4318 | ||
4319 | return std::upper_bound (lower, end, after.c_str (), | |
4320 | lookup_compare_upper); | |
4321 | } | |
4322 | else | |
4323 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4324 | } (); | |
4325 | ||
4326 | /* Now for each symbol name in range, check to see if we have a name | |
4327 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4328 | ||
4329 | /* The same symbol may appear more than once in the range though. | |
4330 | E.g., if we're looking for symbols that complete "w", and we have | |
4331 | a symbol named "w1::w2", we'll find the two name components for | |
4332 | that same symbol in the range. To be sure we only call the | |
4333 | callback once per symbol, we first collect the symbol name | |
4334 | indexes that matched in a temporary vector and ignore | |
4335 | duplicates. */ | |
4336 | std::vector<offset_type> matches; | |
4337 | matches.reserve (std::distance (lower, upper)); | |
4338 | ||
4339 | for (;lower != upper; ++lower) | |
4340 | { | |
4341 | const char *qualified = index.symbol_name_at (lower->idx); | |
4342 | ||
4343 | if (!lookup_name_matcher.matches (qualified) | |
4344 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4345 | continue; |
4346 | ||
3f563c84 PA |
4347 | matches.push_back (lower->idx); |
4348 | } | |
4349 | ||
4350 | std::sort (matches.begin (), matches.end ()); | |
4351 | ||
4352 | /* Finally call the callback, once per match. */ | |
4353 | ULONGEST prev = -1; | |
4354 | for (offset_type idx : matches) | |
4355 | { | |
4356 | if (prev != idx) | |
4357 | { | |
4358 | match_callback (idx); | |
4359 | prev = idx; | |
4360 | } | |
4361 | } | |
4362 | ||
4363 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4364 | (offset_type)-1 are both possible values. */ | |
4365 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4366 | } | |
4367 | ||
c62446b1 PA |
4368 | #if GDB_SELF_TEST |
4369 | ||
4370 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4371 | ||
4372 | /* A wrapper around mapped_index that builds a mock mapped_index, from | |
4373 | the symbol list passed as parameter to the constructor. */ | |
4374 | class mock_mapped_index | |
4375 | { | |
4376 | public: | |
4377 | template<size_t N> | |
4378 | mock_mapped_index (const char *(&symbols)[N]) | |
4379 | : mock_mapped_index (symbols, N) | |
4380 | {} | |
4381 | ||
4382 | /* Access the built index. */ | |
4383 | mapped_index &index () | |
4384 | { return m_index; } | |
4385 | ||
4386 | /* Disable copy. */ | |
4387 | mock_mapped_index(const mock_mapped_index &) = delete; | |
4388 | void operator= (const mock_mapped_index &) = delete; | |
4389 | ||
4390 | private: | |
4391 | mock_mapped_index (const char **symbols, size_t symbols_size) | |
4392 | { | |
4393 | /* No string can live at offset zero. Add a dummy entry. */ | |
4394 | obstack_grow_str0 (&m_constant_pool, ""); | |
4395 | ||
4396 | for (size_t i = 0; i < symbols_size; i++) | |
4397 | { | |
4398 | const char *sym = symbols[i]; | |
4399 | size_t offset = obstack_object_size (&m_constant_pool); | |
4400 | obstack_grow_str0 (&m_constant_pool, sym); | |
4401 | m_symbol_table.push_back (offset); | |
4402 | m_symbol_table.push_back (0); | |
4403 | }; | |
4404 | ||
4405 | m_index.constant_pool = (const char *) obstack_base (&m_constant_pool); | |
4406 | m_index.symbol_table = m_symbol_table.data (); | |
4407 | m_index.symbol_table_slots = m_symbol_table.size () / 2; | |
4408 | } | |
4409 | ||
4410 | public: | |
4411 | /* The built mapped_index. */ | |
4412 | mapped_index m_index{}; | |
4413 | ||
4414 | /* The storage that the built mapped_index uses for symbol and | |
4415 | constant pool tables. */ | |
4416 | std::vector<offset_type> m_symbol_table; | |
4417 | auto_obstack m_constant_pool; | |
4418 | }; | |
4419 | ||
4420 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4421 | string, to pass to print routines. */ | |
4422 | ||
4423 | static const char * | |
4424 | string_or_null (const char *str) | |
4425 | { | |
4426 | return str != NULL ? str : "<null>"; | |
4427 | } | |
4428 | ||
4429 | /* Check if a lookup_name_info built from | |
4430 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4431 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4432 | matching order. If no match expected, then an empty list is | |
4433 | specified. Returns true on success. On failure prints a warning | |
4434 | indicating the file:line that failed, and returns false. */ | |
4435 | ||
4436 | static bool | |
4437 | check_match (const char *file, int line, | |
4438 | mock_mapped_index &mock_index, | |
4439 | const char *name, symbol_name_match_type match_type, | |
4440 | bool completion_mode, | |
4441 | std::initializer_list<const char *> expected_list) | |
4442 | { | |
4443 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4444 | ||
4445 | bool matched = true; | |
4446 | ||
4447 | auto mismatch = [&] (const char *expected_str, | |
4448 | const char *got) | |
4449 | { | |
4450 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4451 | "expected=\"%s\", got=\"%s\"\n"), | |
4452 | file, line, | |
4453 | (match_type == symbol_name_match_type::FULL | |
4454 | ? "FULL" : "WILD"), | |
4455 | name, string_or_null (expected_str), string_or_null (got)); | |
4456 | matched = false; | |
4457 | }; | |
4458 | ||
4459 | auto expected_it = expected_list.begin (); | |
4460 | auto expected_end = expected_list.end (); | |
4461 | ||
4462 | dw2_expand_symtabs_matching_symbol (mock_index.index (), lookup_name, | |
4463 | NULL, ALL_DOMAIN, | |
4464 | [&] (offset_type idx) | |
4465 | { | |
4466 | const char *matched_name = mock_index.index ().symbol_name_at (idx); | |
4467 | const char *expected_str | |
4468 | = expected_it == expected_end ? NULL : *expected_it++; | |
4469 | ||
4470 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4471 | mismatch (expected_str, matched_name); | |
4472 | }); | |
4473 | ||
4474 | const char *expected_str | |
4475 | = expected_it == expected_end ? NULL : *expected_it++; | |
4476 | if (expected_str != NULL) | |
4477 | mismatch (expected_str, NULL); | |
4478 | ||
4479 | return matched; | |
4480 | } | |
4481 | ||
4482 | /* The symbols added to the mock mapped_index for testing (in | |
4483 | canonical form). */ | |
4484 | static const char *test_symbols[] = { | |
4485 | "function", | |
4486 | "std::bar", | |
4487 | "std::zfunction", | |
4488 | "std::zfunction2", | |
4489 | "w1::w2", | |
4490 | "ns::foo<char*>", | |
4491 | "ns::foo<int>", | |
4492 | "ns::foo<long>", | |
4493 | ||
4494 | /* A name with all sorts of complications. Starts with "z" to make | |
4495 | it easier for the completion tests below. */ | |
4496 | #define Z_SYM_NAME \ | |
4497 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4498 | "::tuple<(anonymous namespace)::ui*, " \ | |
4499 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4500 | ||
4501 | Z_SYM_NAME | |
4502 | }; | |
4503 | ||
4504 | static void | |
4505 | run_test () | |
4506 | { | |
4507 | mock_mapped_index mock_index (test_symbols); | |
4508 | ||
4509 | /* We let all tests run until the end even if some fails, for debug | |
4510 | convenience. */ | |
4511 | bool any_mismatch = false; | |
4512 | ||
4513 | /* Create the expected symbols list (an initializer_list). Needed | |
4514 | because lists have commas, and we need to pass them to CHECK, | |
4515 | which is a macro. */ | |
4516 | #define EXPECT(...) { __VA_ARGS__ } | |
4517 | ||
4518 | /* Wrapper for check_match that passes down the current | |
4519 | __FILE__/__LINE__. */ | |
4520 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4521 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4522 | mock_index, \ | |
4523 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4524 | EXPECTED_LIST) | |
4525 | ||
4526 | /* Identity checks. */ | |
4527 | for (const char *sym : test_symbols) | |
4528 | { | |
4529 | /* Should be able to match all existing symbols. */ | |
4530 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4531 | EXPECT (sym)); | |
4532 | ||
4533 | /* Should be able to match all existing symbols with | |
4534 | parameters. */ | |
4535 | std::string with_params = std::string (sym) + "(int)"; | |
4536 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4537 | EXPECT (sym)); | |
4538 | ||
4539 | /* Should be able to match all existing symbols with | |
4540 | parameters and qualifiers. */ | |
4541 | with_params = std::string (sym) + " ( int ) const"; | |
4542 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4543 | EXPECT (sym)); | |
4544 | ||
4545 | /* This should really find sym, but cp-name-parser.y doesn't | |
4546 | know about lvalue/rvalue qualifiers yet. */ | |
4547 | with_params = std::string (sym) + " ( int ) &&"; | |
4548 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4549 | {}); | |
4550 | } | |
4551 | ||
4552 | /* Check that completion mode works at each prefix of the expected | |
4553 | symbol name. */ | |
4554 | { | |
4555 | static const char str[] = "function(int)"; | |
4556 | size_t len = strlen (str); | |
4557 | std::string lookup; | |
4558 | ||
4559 | for (size_t i = 1; i < len; i++) | |
4560 | { | |
4561 | lookup.assign (str, i); | |
4562 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4563 | EXPECT ("function")); | |
4564 | } | |
4565 | } | |
4566 | ||
4567 | /* While "w" is a prefix of both components, the match function | |
4568 | should still only be called once. */ | |
4569 | { | |
4570 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4571 | EXPECT ("w1::w2")); | |
4572 | } | |
4573 | ||
4574 | /* Same, with a "complicated" symbol. */ | |
4575 | { | |
4576 | static const char str[] = Z_SYM_NAME; | |
4577 | size_t len = strlen (str); | |
4578 | std::string lookup; | |
4579 | ||
4580 | for (size_t i = 1; i < len; i++) | |
4581 | { | |
4582 | lookup.assign (str, i); | |
4583 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4584 | EXPECT (Z_SYM_NAME)); | |
4585 | } | |
4586 | } | |
4587 | ||
4588 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4589 | { | |
4590 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4591 | {}); | |
4592 | } | |
4593 | ||
4594 | /* A complete symbol with parameters matches any overload, since the | |
4595 | index has no overload info. */ | |
4596 | { | |
4597 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4598 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4599 | } | |
4600 | ||
4601 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4602 | template argument list. */ | |
4603 | { | |
4604 | static const char expected[] = "ns::foo<int>"; | |
4605 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4606 | EXPECT (expected)); | |
4607 | } | |
4608 | ||
4609 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4610 | template argument list that includes a pointer. */ | |
4611 | { | |
4612 | static const char expected[] = "ns::foo<char*>"; | |
4613 | /* Try both completion and non-completion modes. */ | |
4614 | static const bool completion_mode[2] = {false, true}; | |
4615 | for (size_t i = 0; i < 2; i++) | |
4616 | { | |
4617 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4618 | completion_mode[i], EXPECT (expected)); | |
4619 | ||
4620 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4621 | completion_mode[i], EXPECT (expected)); | |
4622 | } | |
4623 | } | |
4624 | ||
4625 | { | |
4626 | /* Check method qualifiers are ignored. */ | |
4627 | static const char expected[] = "ns::foo<char*>"; | |
4628 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4629 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4630 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4631 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4632 | } | |
4633 | ||
4634 | /* Test lookup names that don't match anything. */ | |
4635 | { | |
4636 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, | |
4637 | {}); | |
4638 | } | |
4639 | ||
4640 | SELF_CHECK (!any_mismatch); | |
4641 | ||
4642 | #undef EXPECT | |
4643 | #undef CHECK_MATCH | |
4644 | } | |
4645 | ||
4646 | }} // namespace selftests::dw2_expand_symtabs_matching | |
4647 | ||
4648 | #endif /* GDB_SELF_TEST */ | |
4649 | ||
3f563c84 PA |
4650 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4651 | matched, to expand corresponding CUs that were marked. IDX is the | |
4652 | index of the symbol name that matched. */ | |
4653 | ||
4654 | static void | |
4655 | dw2_expand_marked_cus | |
4656 | (mapped_index &index, offset_type idx, | |
4657 | struct objfile *objfile, | |
4658 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4659 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4660 | search_domain kind) | |
4661 | { | |
4662 | const char *name; | |
4663 | offset_type *vec, vec_len, vec_idx; | |
4664 | bool global_seen = false; | |
4665 | ||
61920122 PA |
4666 | vec = (offset_type *) (index.constant_pool |
4667 | + MAYBE_SWAP (index.symbol_table[idx + 1])); | |
4668 | vec_len = MAYBE_SWAP (vec[0]); | |
4669 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4670 | { | |
4671 | struct dwarf2_per_cu_data *per_cu; | |
4672 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); | |
4673 | /* This value is only valid for index versions >= 7. */ | |
4674 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4675 | gdb_index_symbol_kind symbol_kind = | |
4676 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4677 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4678 | /* Only check the symbol attributes if they're present. | |
4679 | Indices prior to version 7 don't record them, | |
4680 | and indices >= 7 may elide them for certain symbols | |
4681 | (gold does this). */ | |
4682 | int attrs_valid = | |
4683 | (index.version >= 7 | |
4684 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4685 | ||
4686 | /* Work around gold/15646. */ | |
4687 | if (attrs_valid) | |
9291a0cd | 4688 | { |
61920122 PA |
4689 | if (!is_static && global_seen) |
4690 | continue; | |
4691 | if (!is_static) | |
4692 | global_seen = true; | |
4693 | } | |
3190f0c6 | 4694 | |
61920122 PA |
4695 | /* Only check the symbol's kind if it has one. */ |
4696 | if (attrs_valid) | |
4697 | { | |
4698 | switch (kind) | |
8943b874 | 4699 | { |
61920122 PA |
4700 | case VARIABLES_DOMAIN: |
4701 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4702 | continue; | |
4703 | break; | |
4704 | case FUNCTIONS_DOMAIN: | |
4705 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4706 | continue; |
61920122 PA |
4707 | break; |
4708 | case TYPES_DOMAIN: | |
4709 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4710 | continue; | |
4711 | break; | |
4712 | default: | |
4713 | break; | |
8943b874 | 4714 | } |
61920122 | 4715 | } |
8943b874 | 4716 | |
61920122 PA |
4717 | /* Don't crash on bad data. */ |
4718 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4719 | + dwarf2_per_objfile->n_type_units)) | |
4720 | { | |
4721 | complaint (&symfile_complaints, | |
4722 | _(".gdb_index entry has bad CU index" | |
4723 | " [in module %s]"), objfile_name (objfile)); | |
4724 | continue; | |
4725 | } | |
4726 | ||
4727 | per_cu = dw2_get_cutu (cu_index); | |
4728 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4729 | { | |
4730 | int symtab_was_null = | |
4731 | (per_cu->v.quick->compunit_symtab == NULL); | |
4732 | ||
4733 | dw2_instantiate_symtab (per_cu); | |
4734 | ||
4735 | if (expansion_notify != NULL | |
4736 | && symtab_was_null | |
4737 | && per_cu->v.quick->compunit_symtab != NULL) | |
4738 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4739 | } | |
4740 | } | |
4741 | } | |
4742 | ||
4743 | static void | |
4744 | dw2_expand_symtabs_matching | |
4745 | (struct objfile *objfile, | |
4746 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4747 | const lookup_name_info &lookup_name, | |
4748 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4749 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4750 | enum search_domain kind) | |
4751 | { | |
4752 | int i; | |
4753 | offset_type iter; | |
4754 | ||
4755 | dw2_setup (objfile); | |
4756 | ||
4757 | /* index_table is NULL if OBJF_READNOW. */ | |
4758 | if (!dwarf2_per_objfile->index_table) | |
4759 | return; | |
4760 | ||
4761 | if (file_matcher != NULL) | |
4762 | { | |
4763 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
4764 | htab_eq_pointer, | |
4765 | NULL, xcalloc, xfree)); | |
4766 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
4767 | htab_eq_pointer, | |
4768 | NULL, xcalloc, xfree)); | |
4769 | ||
4770 | /* The rule is CUs specify all the files, including those used by | |
4771 | any TU, so there's no need to scan TUs here. */ | |
4772 | ||
4773 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
4774 | { | |
4775 | int j; | |
4776 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4777 | struct quick_file_names *file_data; | |
4778 | void **slot; | |
4779 | ||
4780 | QUIT; | |
4781 | ||
4782 | per_cu->v.quick->mark = 0; | |
156942c7 | 4783 | |
61920122 PA |
4784 | /* We only need to look at symtabs not already expanded. */ |
4785 | if (per_cu->v.quick->compunit_symtab) | |
4786 | continue; | |
4787 | ||
4788 | file_data = dw2_get_file_names (per_cu); | |
4789 | if (file_data == NULL) | |
4790 | continue; | |
4791 | ||
4792 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4793 | continue; | |
4794 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
3190f0c6 | 4795 | { |
61920122 | 4796 | per_cu->v.quick->mark = 1; |
3190f0c6 DE |
4797 | continue; |
4798 | } | |
4799 | ||
61920122 | 4800 | for (j = 0; j < file_data->num_file_names; ++j) |
276d885b | 4801 | { |
61920122 | 4802 | const char *this_real_name; |
276d885b | 4803 | |
61920122 PA |
4804 | if (file_matcher (file_data->file_names[j], false)) |
4805 | { | |
4806 | per_cu->v.quick->mark = 1; | |
4807 | break; | |
4808 | } | |
4809 | ||
4810 | /* Before we invoke realpath, which can get expensive when many | |
4811 | files are involved, do a quick comparison of the basenames. */ | |
4812 | if (!basenames_may_differ | |
4813 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4814 | true)) | |
4815 | continue; | |
276d885b | 4816 | |
61920122 PA |
4817 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
4818 | if (file_matcher (this_real_name, false)) | |
276d885b | 4819 | { |
61920122 PA |
4820 | per_cu->v.quick->mark = 1; |
4821 | break; | |
276d885b GB |
4822 | } |
4823 | } | |
61920122 PA |
4824 | |
4825 | slot = htab_find_slot (per_cu->v.quick->mark | |
4826 | ? visited_found.get () | |
4827 | : visited_not_found.get (), | |
4828 | file_data, INSERT); | |
4829 | *slot = file_data; | |
9291a0cd | 4830 | } |
61920122 PA |
4831 | } |
4832 | ||
4833 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
4834 | ||
4835 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
4836 | symbol_matcher, | |
4837 | kind, [&] (offset_type idx) | |
4838 | { | |
4839 | dw2_expand_marked_cus (index, idx, objfile, file_matcher, | |
4840 | expansion_notify, kind); | |
4841 | }); | |
9291a0cd TT |
4842 | } |
4843 | ||
43f3e411 | 4844 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4845 | symtab. */ |
4846 | ||
43f3e411 DE |
4847 | static struct compunit_symtab * |
4848 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4849 | CORE_ADDR pc) | |
9703b513 TT |
4850 | { |
4851 | int i; | |
4852 | ||
43f3e411 DE |
4853 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4854 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4855 | return cust; | |
9703b513 | 4856 | |
43f3e411 | 4857 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4858 | return NULL; |
4859 | ||
43f3e411 | 4860 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4861 | { |
43f3e411 | 4862 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4863 | |
43f3e411 | 4864 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4865 | if (s != NULL) |
4866 | return s; | |
4867 | } | |
4868 | ||
4869 | return NULL; | |
4870 | } | |
4871 | ||
43f3e411 DE |
4872 | static struct compunit_symtab * |
4873 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4874 | struct bound_minimal_symbol msymbol, | |
4875 | CORE_ADDR pc, | |
4876 | struct obj_section *section, | |
4877 | int warn_if_readin) | |
9291a0cd TT |
4878 | { |
4879 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4880 | struct compunit_symtab *result; |
9291a0cd TT |
4881 | |
4882 | dw2_setup (objfile); | |
4883 | ||
4884 | if (!objfile->psymtabs_addrmap) | |
4885 | return NULL; | |
4886 | ||
9a3c8263 SM |
4887 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4888 | pc); | |
9291a0cd TT |
4889 | if (!data) |
4890 | return NULL; | |
4891 | ||
43f3e411 | 4892 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4893 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4894 | paddress (get_objfile_arch (objfile), pc)); |
4895 | ||
43f3e411 DE |
4896 | result |
4897 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4898 | pc); | |
9703b513 TT |
4899 | gdb_assert (result != NULL); |
4900 | return result; | |
9291a0cd TT |
4901 | } |
4902 | ||
9291a0cd | 4903 | static void |
44b13c5a | 4904 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4905 | void *data, int need_fullname) |
9291a0cd | 4906 | { |
9291a0cd | 4907 | dw2_setup (objfile); |
ae2de4f8 | 4908 | |
bbf2f4df | 4909 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 4910 | { |
bbf2f4df | 4911 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 4912 | |
bbf2f4df PA |
4913 | htab_up visited (htab_create_alloc (10, |
4914 | htab_hash_pointer, htab_eq_pointer, | |
4915 | NULL, xcalloc, xfree)); | |
24c79950 | 4916 | |
bbf2f4df PA |
4917 | /* The rule is CUs specify all the files, including those used |
4918 | by any TU, so there's no need to scan TUs here. We can | |
4919 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 4920 | |
bbf2f4df PA |
4921 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
4922 | { | |
4923 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 4924 | |
bbf2f4df PA |
4925 | if (per_cu->v.quick->compunit_symtab) |
4926 | { | |
4927 | void **slot = htab_find_slot (visited.get (), | |
4928 | per_cu->v.quick->file_names, | |
4929 | INSERT); | |
9291a0cd | 4930 | |
bbf2f4df PA |
4931 | *slot = per_cu->v.quick->file_names; |
4932 | } | |
24c79950 | 4933 | } |
24c79950 | 4934 | |
bbf2f4df | 4935 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 4936 | { |
bbf2f4df PA |
4937 | int j; |
4938 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4939 | struct quick_file_names *file_data; | |
4940 | void **slot; | |
4941 | ||
4942 | /* We only need to look at symtabs not already expanded. */ | |
4943 | if (per_cu->v.quick->compunit_symtab) | |
4944 | continue; | |
74e2f255 | 4945 | |
bbf2f4df PA |
4946 | file_data = dw2_get_file_names (per_cu); |
4947 | if (file_data == NULL) | |
4948 | continue; | |
4949 | ||
4950 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
4951 | if (*slot) | |
4952 | { | |
4953 | /* Already visited. */ | |
4954 | continue; | |
4955 | } | |
4956 | *slot = file_data; | |
4957 | ||
4958 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4959 | { | |
4960 | const char *filename = file_data->file_names[j]; | |
4961 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4962 | } | |
9291a0cd TT |
4963 | } |
4964 | } | |
bbf2f4df PA |
4965 | |
4966 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4967 | { | |
14278e1f | 4968 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
4969 | |
4970 | if (need_fullname) | |
4971 | this_real_name = gdb_realpath (filename); | |
14278e1f | 4972 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 4973 | }); |
9291a0cd TT |
4974 | } |
4975 | ||
4976 | static int | |
4977 | dw2_has_symbols (struct objfile *objfile) | |
4978 | { | |
4979 | return 1; | |
4980 | } | |
4981 | ||
4982 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4983 | { | |
4984 | dw2_has_symbols, | |
4985 | dw2_find_last_source_symtab, | |
4986 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4987 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4988 | dw2_lookup_symbol, |
9291a0cd TT |
4989 | dw2_print_stats, |
4990 | dw2_dump, | |
4991 | dw2_relocate, | |
4992 | dw2_expand_symtabs_for_function, | |
4993 | dw2_expand_all_symtabs, | |
652a8996 | 4994 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4995 | dw2_map_matching_symbols, |
9291a0cd | 4996 | dw2_expand_symtabs_matching, |
43f3e411 | 4997 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
4998 | dw2_map_symbol_filenames |
4999 | }; | |
5000 | ||
5001 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
5002 | file will use psymtabs, or 1 if using the GNU index. */ | |
5003 | ||
5004 | int | |
5005 | dwarf2_initialize_objfile (struct objfile *objfile) | |
5006 | { | |
5007 | /* If we're about to read full symbols, don't bother with the | |
5008 | indices. In this case we also don't care if some other debug | |
5009 | format is making psymtabs, because they are all about to be | |
5010 | expanded anyway. */ | |
5011 | if ((objfile->flags & OBJF_READNOW)) | |
5012 | { | |
5013 | int i; | |
5014 | ||
5015 | dwarf2_per_objfile->using_index = 1; | |
5016 | create_all_comp_units (objfile); | |
0e50663e | 5017 | create_all_type_units (objfile); |
7b9f3c50 DE |
5018 | dwarf2_per_objfile->quick_file_names_table = |
5019 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 5020 | |
1fd400ff | 5021 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 5022 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 5023 | { |
8832e7e3 | 5024 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 5025 | |
e254ef6a DE |
5026 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5027 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5028 | } |
5029 | ||
5030 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5031 | these functions will be no-ops because we will have expanded | |
5032 | all symtabs. */ | |
5033 | return 1; | |
5034 | } | |
5035 | ||
5036 | if (dwarf2_read_index (objfile)) | |
5037 | return 1; | |
5038 | ||
9291a0cd TT |
5039 | return 0; |
5040 | } | |
5041 | ||
5042 | \f | |
5043 | ||
dce234bc PP |
5044 | /* Build a partial symbol table. */ |
5045 | ||
5046 | void | |
f29dff0a | 5047 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5048 | { |
c9bf0622 | 5049 | |
af5bf4ad SM |
5050 | if (objfile->global_psymbols.capacity () == 0 |
5051 | && objfile->static_psymbols.capacity () == 0) | |
5052 | init_psymbol_list (objfile, 1024); | |
c906108c | 5053 | |
492d29ea | 5054 | TRY |
c9bf0622 TT |
5055 | { |
5056 | /* This isn't really ideal: all the data we allocate on the | |
5057 | objfile's obstack is still uselessly kept around. However, | |
5058 | freeing it seems unsafe. */ | |
906768f9 | 5059 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 5060 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 5061 | psymtabs.keep (); |
c9bf0622 | 5062 | } |
492d29ea PA |
5063 | CATCH (except, RETURN_MASK_ERROR) |
5064 | { | |
5065 | exception_print (gdb_stderr, except); | |
5066 | } | |
5067 | END_CATCH | |
c906108c | 5068 | } |
c906108c | 5069 | |
1ce1cefd DE |
5070 | /* Return the total length of the CU described by HEADER. */ |
5071 | ||
5072 | static unsigned int | |
5073 | get_cu_length (const struct comp_unit_head *header) | |
5074 | { | |
5075 | return header->initial_length_size + header->length; | |
5076 | } | |
5077 | ||
9c541725 | 5078 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 5079 | |
9c541725 PA |
5080 | static inline bool |
5081 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 5082 | { |
9c541725 PA |
5083 | sect_offset bottom = cu_header->sect_off; |
5084 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 5085 | |
9c541725 | 5086 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
5087 | } |
5088 | ||
3b80fe9b DE |
5089 | /* Find the base address of the compilation unit for range lists and |
5090 | location lists. It will normally be specified by DW_AT_low_pc. | |
5091 | In DWARF-3 draft 4, the base address could be overridden by | |
5092 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5093 | compilation units with discontinuous ranges. */ | |
5094 | ||
5095 | static void | |
5096 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5097 | { | |
5098 | struct attribute *attr; | |
5099 | ||
5100 | cu->base_known = 0; | |
5101 | cu->base_address = 0; | |
5102 | ||
5103 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
5104 | if (attr) | |
5105 | { | |
31aa7e4e | 5106 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5107 | cu->base_known = 1; |
5108 | } | |
5109 | else | |
5110 | { | |
5111 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
5112 | if (attr) | |
5113 | { | |
31aa7e4e | 5114 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
5115 | cu->base_known = 1; |
5116 | } | |
5117 | } | |
5118 | } | |
5119 | ||
93311388 | 5120 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 5121 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
5122 | NOTE: This leaves members offset, first_die_offset to be filled in |
5123 | by the caller. */ | |
107d2387 | 5124 | |
d521ce57 | 5125 | static const gdb_byte * |
107d2387 | 5126 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
5127 | const gdb_byte *info_ptr, |
5128 | struct dwarf2_section_info *section, | |
5129 | rcuh_kind section_kind) | |
107d2387 AC |
5130 | { |
5131 | int signed_addr; | |
891d2f0b | 5132 | unsigned int bytes_read; |
43988095 JK |
5133 | const char *filename = get_section_file_name (section); |
5134 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
5135 | |
5136 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
5137 | cu_header->initial_length_size = bytes_read; | |
5138 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 5139 | info_ptr += bytes_read; |
107d2387 AC |
5140 | cu_header->version = read_2_bytes (abfd, info_ptr); |
5141 | info_ptr += 2; | |
43988095 JK |
5142 | if (cu_header->version < 5) |
5143 | switch (section_kind) | |
5144 | { | |
5145 | case rcuh_kind::COMPILE: | |
5146 | cu_header->unit_type = DW_UT_compile; | |
5147 | break; | |
5148 | case rcuh_kind::TYPE: | |
5149 | cu_header->unit_type = DW_UT_type; | |
5150 | break; | |
5151 | default: | |
5152 | internal_error (__FILE__, __LINE__, | |
5153 | _("read_comp_unit_head: invalid section_kind")); | |
5154 | } | |
5155 | else | |
5156 | { | |
5157 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
5158 | (read_1_byte (abfd, info_ptr)); | |
5159 | info_ptr += 1; | |
5160 | switch (cu_header->unit_type) | |
5161 | { | |
5162 | case DW_UT_compile: | |
5163 | if (section_kind != rcuh_kind::COMPILE) | |
5164 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5165 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
5166 | filename); | |
5167 | break; | |
5168 | case DW_UT_type: | |
5169 | section_kind = rcuh_kind::TYPE; | |
5170 | break; | |
5171 | default: | |
5172 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
5173 | "(is %d, should be %d or %d) [in module %s]"), | |
5174 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
5175 | } | |
5176 | ||
5177 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5178 | info_ptr += 1; | |
5179 | } | |
9c541725 PA |
5180 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
5181 | cu_header, | |
5182 | &bytes_read); | |
613e1657 | 5183 | info_ptr += bytes_read; |
43988095 JK |
5184 | if (cu_header->version < 5) |
5185 | { | |
5186 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
5187 | info_ptr += 1; | |
5188 | } | |
107d2387 AC |
5189 | signed_addr = bfd_get_sign_extend_vma (abfd); |
5190 | if (signed_addr < 0) | |
8e65ff28 | 5191 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 5192 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 5193 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 5194 | |
43988095 JK |
5195 | if (section_kind == rcuh_kind::TYPE) |
5196 | { | |
5197 | LONGEST type_offset; | |
5198 | ||
5199 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
5200 | info_ptr += 8; | |
5201 | ||
5202 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
5203 | info_ptr += bytes_read; | |
9c541725 PA |
5204 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
5205 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
5206 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
5207 | "header (is %s) [in module %s]"), plongest (type_offset), | |
5208 | filename); | |
5209 | } | |
5210 | ||
107d2387 AC |
5211 | return info_ptr; |
5212 | } | |
5213 | ||
36586728 TT |
5214 | /* Helper function that returns the proper abbrev section for |
5215 | THIS_CU. */ | |
5216 | ||
5217 | static struct dwarf2_section_info * | |
5218 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5219 | { | |
5220 | struct dwarf2_section_info *abbrev; | |
5221 | ||
5222 | if (this_cu->is_dwz) | |
5223 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
5224 | else | |
5225 | abbrev = &dwarf2_per_objfile->abbrev; | |
5226 | ||
5227 | return abbrev; | |
5228 | } | |
5229 | ||
9ff913ba DE |
5230 | /* Subroutine of read_and_check_comp_unit_head and |
5231 | read_and_check_type_unit_head to simplify them. | |
5232 | Perform various error checking on the header. */ | |
5233 | ||
5234 | static void | |
5235 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
5236 | struct dwarf2_section_info *section, |
5237 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 5238 | { |
a32a8923 | 5239 | const char *filename = get_section_file_name (section); |
9ff913ba | 5240 | |
43988095 | 5241 | if (header->version < 2 || header->version > 5) |
9ff913ba | 5242 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 5243 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
5244 | filename); |
5245 | ||
9c541725 | 5246 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 5247 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
5248 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
5249 | "(offset 0x%x + 6) [in module %s]"), | |
5250 | to_underlying (header->abbrev_sect_off), | |
5251 | to_underlying (header->sect_off), | |
9ff913ba DE |
5252 | filename); |
5253 | ||
9c541725 | 5254 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 5255 | avoid potential 32-bit overflow. */ |
9c541725 | 5256 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 5257 | > section->size) |
9c541725 PA |
5258 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
5259 | "(offset 0x%x + 0) [in module %s]"), | |
5260 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
5261 | filename); |
5262 | } | |
5263 | ||
5264 | /* Read in a CU/TU header and perform some basic error checking. | |
5265 | The contents of the header are stored in HEADER. | |
5266 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 5267 | |
d521ce57 | 5268 | static const gdb_byte * |
9ff913ba DE |
5269 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
5270 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 5271 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 5272 | const gdb_byte *info_ptr, |
43988095 | 5273 | rcuh_kind section_kind) |
72bf9492 | 5274 | { |
d521ce57 | 5275 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 5276 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 5277 | |
9c541725 | 5278 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 5279 | |
43988095 | 5280 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 5281 | |
9c541725 | 5282 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 5283 | |
4bdcc0c1 | 5284 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
5285 | |
5286 | return info_ptr; | |
348e048f DE |
5287 | } |
5288 | ||
f4dc4d17 DE |
5289 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5290 | ||
5291 | static sect_offset | |
5292 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 5293 | sect_offset sect_off) |
f4dc4d17 | 5294 | { |
a32a8923 | 5295 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 5296 | const gdb_byte *info_ptr; |
ac298888 | 5297 | unsigned int initial_length_size, offset_size; |
43988095 | 5298 | uint16_t version; |
f4dc4d17 DE |
5299 | |
5300 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 5301 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5302 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5303 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5304 | info_ptr += initial_length_size; |
5305 | ||
5306 | version = read_2_bytes (abfd, info_ptr); | |
5307 | info_ptr += 2; | |
5308 | if (version >= 5) | |
5309 | { | |
5310 | /* Skip unit type and address size. */ | |
5311 | info_ptr += 2; | |
5312 | } | |
5313 | ||
9c541725 | 5314 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5315 | } |
5316 | ||
aaa75496 JB |
5317 | /* Allocate a new partial symtab for file named NAME and mark this new |
5318 | partial symtab as being an include of PST. */ | |
5319 | ||
5320 | static void | |
d521ce57 | 5321 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
5322 | struct objfile *objfile) |
5323 | { | |
5324 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
5325 | ||
fbd9ab74 JK |
5326 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5327 | { | |
5328 | /* It shares objfile->objfile_obstack. */ | |
5329 | subpst->dirname = pst->dirname; | |
5330 | } | |
5331 | ||
aaa75496 JB |
5332 | subpst->textlow = 0; |
5333 | subpst->texthigh = 0; | |
5334 | ||
8d749320 SM |
5335 | subpst->dependencies |
5336 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
5337 | subpst->dependencies[0] = pst; |
5338 | subpst->number_of_dependencies = 1; | |
5339 | ||
5340 | subpst->globals_offset = 0; | |
5341 | subpst->n_global_syms = 0; | |
5342 | subpst->statics_offset = 0; | |
5343 | subpst->n_static_syms = 0; | |
43f3e411 | 5344 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
5345 | subpst->read_symtab = pst->read_symtab; |
5346 | subpst->readin = 0; | |
5347 | ||
5348 | /* No private part is necessary for include psymtabs. This property | |
5349 | can be used to differentiate between such include psymtabs and | |
10b3939b | 5350 | the regular ones. */ |
58a9656e | 5351 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
5352 | } |
5353 | ||
5354 | /* Read the Line Number Program data and extract the list of files | |
5355 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5356 | partial symtab for each of these included files. */ |
aaa75496 JB |
5357 | |
5358 | static void | |
5359 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
5360 | struct die_info *die, |
5361 | struct partial_symtab *pst) | |
aaa75496 | 5362 | { |
fff8551c | 5363 | line_header_up lh; |
d85a05f0 | 5364 | struct attribute *attr; |
aaa75496 | 5365 | |
d85a05f0 DJ |
5366 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
5367 | if (attr) | |
9c541725 | 5368 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5369 | if (lh == NULL) |
5370 | return; /* No linetable, so no includes. */ | |
5371 | ||
c6da4cef | 5372 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 5373 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
5374 | } |
5375 | ||
348e048f | 5376 | static hashval_t |
52dc124a | 5377 | hash_signatured_type (const void *item) |
348e048f | 5378 | { |
9a3c8263 SM |
5379 | const struct signatured_type *sig_type |
5380 | = (const struct signatured_type *) item; | |
9a619af0 | 5381 | |
348e048f | 5382 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5383 | return sig_type->signature; |
348e048f DE |
5384 | } |
5385 | ||
5386 | static int | |
52dc124a | 5387 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5388 | { |
9a3c8263 SM |
5389 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5390 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5391 | |
348e048f DE |
5392 | return lhs->signature == rhs->signature; |
5393 | } | |
5394 | ||
1fd400ff TT |
5395 | /* Allocate a hash table for signatured types. */ |
5396 | ||
5397 | static htab_t | |
673bfd45 | 5398 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
5399 | { |
5400 | return htab_create_alloc_ex (41, | |
52dc124a DE |
5401 | hash_signatured_type, |
5402 | eq_signatured_type, | |
1fd400ff TT |
5403 | NULL, |
5404 | &objfile->objfile_obstack, | |
5405 | hashtab_obstack_allocate, | |
5406 | dummy_obstack_deallocate); | |
5407 | } | |
5408 | ||
d467dd73 | 5409 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
5410 | |
5411 | static int | |
d467dd73 | 5412 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 5413 | { |
9a3c8263 SM |
5414 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
5415 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 5416 | |
b4dd5633 | 5417 | **datap = sigt; |
1fd400ff TT |
5418 | ++*datap; |
5419 | ||
5420 | return 1; | |
5421 | } | |
5422 | ||
78d4d2c5 | 5423 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
5424 | and fill them into TYPES_HTAB. It will process only type units, |
5425 | therefore DW_UT_type. */ | |
c88ee1f0 | 5426 | |
78d4d2c5 JK |
5427 | static void |
5428 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
5429 | dwarf2_section_info *section, htab_t &types_htab, |
5430 | rcuh_kind section_kind) | |
348e048f | 5431 | { |
3019eac3 | 5432 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 5433 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
5434 | bfd *abfd; |
5435 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 5436 | |
4bdcc0c1 DE |
5437 | abbrev_section = (dwo_file != NULL |
5438 | ? &dwo_file->sections.abbrev | |
5439 | : &dwarf2_per_objfile->abbrev); | |
5440 | ||
b4f54984 | 5441 | if (dwarf_read_debug) |
43988095 JK |
5442 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
5443 | get_section_name (section), | |
a32a8923 | 5444 | get_section_file_name (abbrev_section)); |
09406207 | 5445 | |
78d4d2c5 JK |
5446 | dwarf2_read_section (objfile, section); |
5447 | info_ptr = section->buffer; | |
348e048f | 5448 | |
78d4d2c5 JK |
5449 | if (info_ptr == NULL) |
5450 | return; | |
348e048f | 5451 | |
78d4d2c5 JK |
5452 | /* We can't set abfd until now because the section may be empty or |
5453 | not present, in which case the bfd is unknown. */ | |
5454 | abfd = get_section_bfd_owner (section); | |
348e048f | 5455 | |
78d4d2c5 JK |
5456 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
5457 | because we don't need to read any dies: the signature is in the | |
5458 | header. */ | |
3019eac3 | 5459 | |
78d4d2c5 JK |
5460 | end_ptr = info_ptr + section->size; |
5461 | while (info_ptr < end_ptr) | |
5462 | { | |
78d4d2c5 JK |
5463 | struct signatured_type *sig_type; |
5464 | struct dwo_unit *dwo_tu; | |
5465 | void **slot; | |
5466 | const gdb_byte *ptr = info_ptr; | |
5467 | struct comp_unit_head header; | |
5468 | unsigned int length; | |
8b70b953 | 5469 | |
9c541725 | 5470 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 5471 | |
a49dd8dd JK |
5472 | /* Initialize it due to a false compiler warning. */ |
5473 | header.signature = -1; | |
9c541725 | 5474 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 5475 | |
78d4d2c5 JK |
5476 | /* We need to read the type's signature in order to build the hash |
5477 | table, but we don't need anything else just yet. */ | |
348e048f | 5478 | |
43988095 JK |
5479 | ptr = read_and_check_comp_unit_head (&header, section, |
5480 | abbrev_section, ptr, section_kind); | |
348e048f | 5481 | |
78d4d2c5 | 5482 | length = get_cu_length (&header); |
6caca83c | 5483 | |
78d4d2c5 JK |
5484 | /* Skip dummy type units. */ |
5485 | if (ptr >= info_ptr + length | |
43988095 JK |
5486 | || peek_abbrev_code (abfd, ptr) == 0 |
5487 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
5488 | { |
5489 | info_ptr += length; | |
5490 | continue; | |
5491 | } | |
dee91e82 | 5492 | |
78d4d2c5 JK |
5493 | if (types_htab == NULL) |
5494 | { | |
5495 | if (dwo_file) | |
5496 | types_htab = allocate_dwo_unit_table (objfile); | |
5497 | else | |
5498 | types_htab = allocate_signatured_type_table (objfile); | |
5499 | } | |
8b70b953 | 5500 | |
78d4d2c5 JK |
5501 | if (dwo_file) |
5502 | { | |
5503 | sig_type = NULL; | |
5504 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5505 | struct dwo_unit); | |
5506 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 5507 | dwo_tu->signature = header.signature; |
9c541725 | 5508 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 5509 | dwo_tu->section = section; |
9c541725 | 5510 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
5511 | dwo_tu->length = length; |
5512 | } | |
5513 | else | |
5514 | { | |
5515 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
5516 | The real type_offset is in the DWO file. */ | |
5517 | dwo_tu = NULL; | |
5518 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5519 | struct signatured_type); | |
43988095 | 5520 | sig_type->signature = header.signature; |
9c541725 | 5521 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
5522 | sig_type->per_cu.objfile = objfile; |
5523 | sig_type->per_cu.is_debug_types = 1; | |
5524 | sig_type->per_cu.section = section; | |
9c541725 | 5525 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
5526 | sig_type->per_cu.length = length; |
5527 | } | |
5528 | ||
5529 | slot = htab_find_slot (types_htab, | |
5530 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
5531 | INSERT); | |
5532 | gdb_assert (slot != NULL); | |
5533 | if (*slot != NULL) | |
5534 | { | |
9c541725 | 5535 | sect_offset dup_sect_off; |
0349ea22 | 5536 | |
3019eac3 DE |
5537 | if (dwo_file) |
5538 | { | |
78d4d2c5 JK |
5539 | const struct dwo_unit *dup_tu |
5540 | = (const struct dwo_unit *) *slot; | |
5541 | ||
9c541725 | 5542 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
5543 | } |
5544 | else | |
5545 | { | |
78d4d2c5 JK |
5546 | const struct signatured_type *dup_tu |
5547 | = (const struct signatured_type *) *slot; | |
5548 | ||
9c541725 | 5549 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 5550 | } |
8b70b953 | 5551 | |
78d4d2c5 JK |
5552 | complaint (&symfile_complaints, |
5553 | _("debug type entry at offset 0x%x is duplicate to" | |
5554 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 5555 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 5556 | hex_string (header.signature)); |
78d4d2c5 JK |
5557 | } |
5558 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 5559 | |
78d4d2c5 JK |
5560 | if (dwarf_read_debug > 1) |
5561 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 5562 | to_underlying (sect_off), |
43988095 | 5563 | hex_string (header.signature)); |
3019eac3 | 5564 | |
78d4d2c5 JK |
5565 | info_ptr += length; |
5566 | } | |
5567 | } | |
3019eac3 | 5568 | |
78d4d2c5 JK |
5569 | /* Create the hash table of all entries in the .debug_types |
5570 | (or .debug_types.dwo) section(s). | |
5571 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
5572 | otherwise it is NULL. | |
b3c8eb43 | 5573 | |
78d4d2c5 | 5574 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 5575 | |
78d4d2c5 | 5576 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 5577 | |
78d4d2c5 JK |
5578 | static void |
5579 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
5580 | VEC (dwarf2_section_info_def) *types, | |
5581 | htab_t &types_htab) | |
5582 | { | |
5583 | int ix; | |
5584 | struct dwarf2_section_info *section; | |
5585 | ||
5586 | if (VEC_empty (dwarf2_section_info_def, types)) | |
5587 | return; | |
348e048f | 5588 | |
78d4d2c5 JK |
5589 | for (ix = 0; |
5590 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5591 | ++ix) | |
43988095 JK |
5592 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5593 | rcuh_kind::TYPE); | |
3019eac3 DE |
5594 | } |
5595 | ||
5596 | /* Create the hash table of all entries in the .debug_types section, | |
5597 | and initialize all_type_units. | |
5598 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5599 | otherwise non-zero. */ | |
5600 | ||
5601 | static int | |
5602 | create_all_type_units (struct objfile *objfile) | |
5603 | { | |
78d4d2c5 | 5604 | htab_t types_htab = NULL; |
b4dd5633 | 5605 | struct signatured_type **iter; |
3019eac3 | 5606 | |
43988095 JK |
5607 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5608 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5609 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5610 | if (types_htab == NULL) |
5611 | { | |
5612 | dwarf2_per_objfile->signatured_types = NULL; | |
5613 | return 0; | |
5614 | } | |
5615 | ||
348e048f DE |
5616 | dwarf2_per_objfile->signatured_types = types_htab; |
5617 | ||
6aa5f3a6 DE |
5618 | dwarf2_per_objfile->n_type_units |
5619 | = dwarf2_per_objfile->n_allocated_type_units | |
5620 | = htab_elements (types_htab); | |
8d749320 SM |
5621 | dwarf2_per_objfile->all_type_units = |
5622 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5623 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5624 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5625 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5626 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5627 | |
348e048f DE |
5628 | return 1; |
5629 | } | |
5630 | ||
6aa5f3a6 DE |
5631 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5632 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5633 | Otherwise we find one. */ | |
5634 | ||
5635 | static struct signatured_type * | |
5636 | add_type_unit (ULONGEST sig, void **slot) | |
5637 | { | |
5638 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5639 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5640 | struct signatured_type *sig_type; | |
5641 | ||
5642 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5643 | ++n_type_units; | |
5644 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5645 | { | |
5646 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5647 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5648 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5649 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5650 | = XRESIZEVEC (struct signatured_type *, |
5651 | dwarf2_per_objfile->all_type_units, | |
5652 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5653 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5654 | } | |
5655 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5656 | ||
5657 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5658 | struct signatured_type); | |
5659 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5660 | sig_type->signature = sig; | |
5661 | sig_type->per_cu.is_debug_types = 1; | |
5662 | if (dwarf2_per_objfile->using_index) | |
5663 | { | |
5664 | sig_type->per_cu.v.quick = | |
5665 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5666 | struct dwarf2_per_cu_quick_data); | |
5667 | } | |
5668 | ||
5669 | if (slot == NULL) | |
5670 | { | |
5671 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5672 | sig_type, INSERT); | |
5673 | } | |
5674 | gdb_assert (*slot == NULL); | |
5675 | *slot = sig_type; | |
5676 | /* The rest of sig_type must be filled in by the caller. */ | |
5677 | return sig_type; | |
5678 | } | |
5679 | ||
a2ce51a0 DE |
5680 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5681 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5682 | ||
5683 | static void | |
5684 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5685 | struct signatured_type *sig_entry, | |
5686 | struct dwo_unit *dwo_entry) | |
5687 | { | |
7ee85ab1 | 5688 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5689 | gdb_assert (! sig_entry->per_cu.queued); |
5690 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5691 | if (dwarf2_per_objfile->using_index) |
5692 | { | |
5693 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5694 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5695 | } |
5696 | else | |
5697 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5698 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5699 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5700 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5701 | gdb_assert (sig_entry->dwo_unit == NULL); |
5702 | ||
5703 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5704 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5705 | sig_entry->per_cu.length = dwo_entry->length; |
5706 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5707 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5708 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5709 | sig_entry->dwo_unit = dwo_entry; | |
5710 | } | |
5711 | ||
5712 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5713 | If we haven't read the TU yet, create the signatured_type data structure |
5714 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5715 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5716 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5717 | containing that CU. Otherwise we could end up reading several other DWO | |
5718 | files (due to comdat folding) to process the transitive closure of all the | |
5719 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5720 | type signature that it needs. | |
a2ce51a0 DE |
5721 | We only do this for .gdb_index because in the psymtab case we already have |
5722 | to read all the DWOs to build the type unit groups. */ | |
5723 | ||
5724 | static struct signatured_type * | |
5725 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5726 | { | |
5727 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5728 | struct dwo_file *dwo_file; | |
5729 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5730 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5731 | void **slot; |
a2ce51a0 DE |
5732 | |
5733 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5734 | ||
6aa5f3a6 DE |
5735 | /* If TU skeletons have been removed then we may not have read in any |
5736 | TUs yet. */ | |
5737 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5738 | { | |
5739 | dwarf2_per_objfile->signatured_types | |
5740 | = allocate_signatured_type_table (objfile); | |
5741 | } | |
a2ce51a0 DE |
5742 | |
5743 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5744 | Use the global signatured_types array to do our own comdat-folding |
5745 | of types. If this is the first time we're reading this TU, and | |
5746 | the TU has an entry in .gdb_index, replace the recorded data from | |
5747 | .gdb_index with this TU. */ | |
a2ce51a0 | 5748 | |
a2ce51a0 | 5749 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
5750 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
5751 | &find_sig_entry, INSERT); | |
9a3c8263 | 5752 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5753 | |
5754 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5755 | read. Don't reassign the global entry to point to this DWO if that's |
5756 | the case. Also note that if the TU is already being read, it may not | |
5757 | have come from a DWO, the program may be a mix of Fission-compiled | |
5758 | code and non-Fission-compiled code. */ | |
5759 | ||
5760 | /* Have we already tried to read this TU? | |
5761 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5762 | needn't exist in the global table yet). */ | |
5763 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
5764 | return sig_entry; |
5765 | ||
6aa5f3a6 DE |
5766 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
5767 | dwo_unit of the TU itself. */ | |
5768 | dwo_file = cu->dwo_unit->dwo_file; | |
5769 | ||
a2ce51a0 DE |
5770 | /* Ok, this is the first time we're reading this TU. */ |
5771 | if (dwo_file->tus == NULL) | |
5772 | return NULL; | |
5773 | find_dwo_entry.signature = sig; | |
9a3c8263 | 5774 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
5775 | if (dwo_entry == NULL) |
5776 | return NULL; | |
5777 | ||
6aa5f3a6 DE |
5778 | /* If the global table doesn't have an entry for this TU, add one. */ |
5779 | if (sig_entry == NULL) | |
5780 | sig_entry = add_type_unit (sig, slot); | |
5781 | ||
a2ce51a0 | 5782 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 5783 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
5784 | return sig_entry; |
5785 | } | |
5786 | ||
a2ce51a0 DE |
5787 | /* Subroutine of lookup_signatured_type. |
5788 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
5789 | then try the DWP file. If the TU stub (skeleton) has been removed then |
5790 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
5791 | |
5792 | static struct signatured_type * | |
5793 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5794 | { | |
5795 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5796 | struct dwp_file *dwp_file = get_dwp_file (); | |
5797 | struct dwo_unit *dwo_entry; | |
5798 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5799 | void **slot; |
a2ce51a0 DE |
5800 | |
5801 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5802 | gdb_assert (dwp_file != NULL); | |
5803 | ||
6aa5f3a6 DE |
5804 | /* If TU skeletons have been removed then we may not have read in any |
5805 | TUs yet. */ | |
5806 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 5807 | { |
6aa5f3a6 DE |
5808 | dwarf2_per_objfile->signatured_types |
5809 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
5810 | } |
5811 | ||
6aa5f3a6 DE |
5812 | find_sig_entry.signature = sig; |
5813 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5814 | &find_sig_entry, INSERT); | |
9a3c8263 | 5815 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
5816 | |
5817 | /* Have we already tried to read this TU? | |
5818 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5819 | needn't exist in the global table yet). */ | |
5820 | if (sig_entry != NULL) | |
5821 | return sig_entry; | |
5822 | ||
a2ce51a0 DE |
5823 | if (dwp_file->tus == NULL) |
5824 | return NULL; | |
57d63ce2 DE |
5825 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
5826 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
5827 | if (dwo_entry == NULL) |
5828 | return NULL; | |
5829 | ||
6aa5f3a6 | 5830 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
5831 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
5832 | ||
a2ce51a0 DE |
5833 | return sig_entry; |
5834 | } | |
5835 | ||
380bca97 | 5836 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5837 | Returns NULL if signature SIG is not present in the table. |
5838 | It is up to the caller to complain about this. */ | |
348e048f DE |
5839 | |
5840 | static struct signatured_type * | |
a2ce51a0 | 5841 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5842 | { |
a2ce51a0 DE |
5843 | if (cu->dwo_unit |
5844 | && dwarf2_per_objfile->using_index) | |
5845 | { | |
5846 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5847 | These cases require special processing. */ | |
5848 | if (get_dwp_file () == NULL) | |
5849 | return lookup_dwo_signatured_type (cu, sig); | |
5850 | else | |
5851 | return lookup_dwp_signatured_type (cu, sig); | |
5852 | } | |
5853 | else | |
5854 | { | |
5855 | struct signatured_type find_entry, *entry; | |
348e048f | 5856 | |
a2ce51a0 DE |
5857 | if (dwarf2_per_objfile->signatured_types == NULL) |
5858 | return NULL; | |
5859 | find_entry.signature = sig; | |
9a3c8263 SM |
5860 | entry = ((struct signatured_type *) |
5861 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5862 | return entry; |
5863 | } | |
348e048f | 5864 | } |
42e7ad6c DE |
5865 | \f |
5866 | /* Low level DIE reading support. */ | |
348e048f | 5867 | |
d85a05f0 DJ |
5868 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5869 | ||
5870 | static void | |
5871 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5872 | struct dwarf2_cu *cu, |
3019eac3 DE |
5873 | struct dwarf2_section_info *section, |
5874 | struct dwo_file *dwo_file) | |
d85a05f0 | 5875 | { |
fceca515 | 5876 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5877 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5878 | reader->cu = cu; |
3019eac3 | 5879 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5880 | reader->die_section = section; |
5881 | reader->buffer = section->buffer; | |
f664829e | 5882 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5883 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5884 | } |
5885 | ||
b0c7bfa9 DE |
5886 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5887 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5888 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5889 | already. | |
5890 | ||
5891 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5892 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5893 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5894 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5895 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5896 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5897 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5898 | are filled in with the info of the DIE from the DWO file. | |
5899 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5900 | provided an abbrev table to use. | |
5901 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5902 | ||
5903 | static int | |
5904 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5905 | struct dwo_unit *dwo_unit, | |
5906 | int abbrev_table_provided, | |
5907 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5908 | const char *stub_comp_dir, |
b0c7bfa9 | 5909 | struct die_reader_specs *result_reader, |
d521ce57 | 5910 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5911 | struct die_info **result_comp_unit_die, |
5912 | int *result_has_children) | |
5913 | { | |
5914 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5915 | struct dwarf2_cu *cu = this_cu->cu; | |
5916 | struct dwarf2_section_info *section; | |
5917 | bfd *abfd; | |
d521ce57 | 5918 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5919 | ULONGEST signature; /* Or dwo_id. */ |
5920 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5921 | int i,num_extra_attrs; | |
5922 | struct dwarf2_section_info *dwo_abbrev_section; | |
5923 | struct attribute *attr; | |
5924 | struct die_info *comp_unit_die; | |
5925 | ||
b0aeadb3 DE |
5926 | /* At most one of these may be provided. */ |
5927 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5928 | |
b0c7bfa9 DE |
5929 | /* These attributes aren't processed until later: |
5930 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5931 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5932 | referenced later. However, these attributes are found in the stub | |
5933 | which we won't have later. In order to not impose this complication | |
5934 | on the rest of the code, we read them here and copy them to the | |
5935 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5936 | |
5937 | stmt_list = NULL; | |
5938 | low_pc = NULL; | |
5939 | high_pc = NULL; | |
5940 | ranges = NULL; | |
5941 | comp_dir = NULL; | |
5942 | ||
5943 | if (stub_comp_unit_die != NULL) | |
5944 | { | |
5945 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5946 | DWO file. */ | |
5947 | if (! this_cu->is_debug_types) | |
5948 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5949 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5950 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5951 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5952 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5953 | ||
5954 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5955 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5956 | cu->addr_base = 0; | |
5957 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5958 | if (attr) | |
5959 | cu->addr_base = DW_UNSND (attr); | |
5960 | ||
5961 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5962 | We need the value before we can process DW_AT_ranges. */ | |
5963 | cu->ranges_base = 0; | |
5964 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5965 | if (attr) | |
5966 | cu->ranges_base = DW_UNSND (attr); | |
5967 | } | |
a2ce51a0 DE |
5968 | else if (stub_comp_dir != NULL) |
5969 | { | |
5970 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5971 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5972 | comp_dir->name = DW_AT_comp_dir; |
5973 | comp_dir->form = DW_FORM_string; | |
5974 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5975 | DW_STRING (comp_dir) = stub_comp_dir; | |
5976 | } | |
b0c7bfa9 DE |
5977 | |
5978 | /* Set up for reading the DWO CU/TU. */ | |
5979 | cu->dwo_unit = dwo_unit; | |
5980 | section = dwo_unit->section; | |
5981 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5982 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
5983 | begin_info_ptr = info_ptr = (section->buffer |
5984 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
5985 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
5986 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5987 | ||
5988 | if (this_cu->is_debug_types) | |
5989 | { | |
b0c7bfa9 DE |
5990 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
5991 | ||
43988095 | 5992 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 5993 | dwo_abbrev_section, |
43988095 | 5994 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 5995 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 5996 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
5997 | { |
5998 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5999 | " TU at offset 0x%x [in module %s]"), | |
6000 | hex_string (sig_type->signature), | |
43988095 | 6001 | hex_string (cu->header.signature), |
9c541725 | 6002 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
6003 | bfd_get_filename (abfd)); |
6004 | } | |
9c541725 | 6005 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6006 | /* For DWOs coming from DWP files, we don't know the CU length |
6007 | nor the type's offset in the TU until now. */ | |
6008 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 6009 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6010 | |
6011 | /* Establish the type offset that can be used to lookup the type. | |
6012 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6013 | sig_type->type_offset_in_section |
6014 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6015 | } |
6016 | else | |
6017 | { | |
6018 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
6019 | dwo_abbrev_section, | |
43988095 | 6020 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6021 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6022 | /* For DWOs coming from DWP files, we don't know the CU length |
6023 | until now. */ | |
6024 | dwo_unit->length = get_cu_length (&cu->header); | |
6025 | } | |
6026 | ||
02142a6c DE |
6027 | /* Replace the CU's original abbrev table with the DWO's. |
6028 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
6029 | if (abbrev_table_provided) |
6030 | { | |
6031 | /* Don't free the provided abbrev table, the caller of | |
6032 | init_cutu_and_read_dies owns it. */ | |
6033 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6034 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
6035 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6036 | } | |
6037 | else | |
6038 | { | |
6039 | dwarf2_free_abbrev_table (cu); | |
6040 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 6041 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
6042 | } |
6043 | ||
6044 | /* Read in the die, but leave space to copy over the attributes | |
6045 | from the stub. This has the benefit of simplifying the rest of | |
6046 | the code - all the work to maintain the illusion of a single | |
6047 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6048 | num_extra_attrs = ((stmt_list != NULL) | |
6049 | + (low_pc != NULL) | |
6050 | + (high_pc != NULL) | |
6051 | + (ranges != NULL) | |
6052 | + (comp_dir != NULL)); | |
6053 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
6054 | result_has_children, num_extra_attrs); | |
6055 | ||
6056 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6057 | comp_unit_die = *result_comp_unit_die; | |
6058 | i = comp_unit_die->num_attrs; | |
6059 | if (stmt_list != NULL) | |
6060 | comp_unit_die->attrs[i++] = *stmt_list; | |
6061 | if (low_pc != NULL) | |
6062 | comp_unit_die->attrs[i++] = *low_pc; | |
6063 | if (high_pc != NULL) | |
6064 | comp_unit_die->attrs[i++] = *high_pc; | |
6065 | if (ranges != NULL) | |
6066 | comp_unit_die->attrs[i++] = *ranges; | |
6067 | if (comp_dir != NULL) | |
6068 | comp_unit_die->attrs[i++] = *comp_dir; | |
6069 | comp_unit_die->num_attrs += num_extra_attrs; | |
6070 | ||
b4f54984 | 6071 | if (dwarf_die_debug) |
bf6af496 DE |
6072 | { |
6073 | fprintf_unfiltered (gdb_stdlog, | |
6074 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 6075 | get_section_name (section), |
bf6af496 DE |
6076 | (unsigned) (begin_info_ptr - section->buffer), |
6077 | bfd_get_filename (abfd)); | |
b4f54984 | 6078 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6079 | } |
6080 | ||
a2ce51a0 DE |
6081 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
6082 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
6083 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
6084 | to get it via circuitous means. Blech. */ | |
6085 | if (comp_dir != NULL) | |
6086 | result_reader->comp_dir = DW_STRING (comp_dir); | |
6087 | ||
b0c7bfa9 DE |
6088 | /* Skip dummy compilation units. */ |
6089 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6090 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6091 | return 0; | |
6092 | ||
6093 | *result_info_ptr = info_ptr; | |
6094 | return 1; | |
6095 | } | |
6096 | ||
6097 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
6098 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 6099 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6100 | |
6101 | static struct dwo_unit * | |
6102 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
6103 | struct die_info *comp_unit_die) | |
6104 | { | |
6105 | struct dwarf2_cu *cu = this_cu->cu; | |
6106 | struct attribute *attr; | |
6107 | ULONGEST signature; | |
6108 | struct dwo_unit *dwo_unit; | |
6109 | const char *comp_dir, *dwo_name; | |
6110 | ||
a2ce51a0 DE |
6111 | gdb_assert (cu != NULL); |
6112 | ||
b0c7bfa9 | 6113 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
6114 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6115 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
6116 | |
6117 | if (this_cu->is_debug_types) | |
6118 | { | |
6119 | struct signatured_type *sig_type; | |
6120 | ||
6121 | /* Since this_cu is the first member of struct signatured_type, | |
6122 | we can go from a pointer to one to a pointer to the other. */ | |
6123 | sig_type = (struct signatured_type *) this_cu; | |
6124 | signature = sig_type->signature; | |
6125 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
6126 | } | |
6127 | else | |
6128 | { | |
6129 | struct attribute *attr; | |
6130 | ||
6131 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6132 | if (! attr) | |
6133 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
6134 | " [in module %s]"), | |
4262abfb | 6135 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
6136 | signature = DW_UNSND (attr); |
6137 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
6138 | signature); | |
6139 | } | |
6140 | ||
b0c7bfa9 DE |
6141 | return dwo_unit; |
6142 | } | |
6143 | ||
a2ce51a0 | 6144 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
6145 | See it for a description of the parameters. |
6146 | Read a TU directly from a DWO file, bypassing the stub. | |
6147 | ||
6148 | Note: This function could be a little bit simpler if we shared cleanups | |
6149 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
6150 | to do, so we keep this function self-contained. Or we could move this | |
6151 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
6152 | |
6153 | static void | |
6aa5f3a6 DE |
6154 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
6155 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
6156 | die_reader_func_ftype *die_reader_func, |
6157 | void *data) | |
6158 | { | |
6159 | struct dwarf2_cu *cu; | |
6160 | struct signatured_type *sig_type; | |
6aa5f3a6 | 6161 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
6162 | struct die_reader_specs reader; |
6163 | const gdb_byte *info_ptr; | |
6164 | struct die_info *comp_unit_die; | |
6165 | int has_children; | |
6166 | ||
6167 | /* Verify we can do the following downcast, and that we have the | |
6168 | data we need. */ | |
6169 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6170 | sig_type = (struct signatured_type *) this_cu; | |
6171 | gdb_assert (sig_type->dwo_unit != NULL); | |
6172 | ||
6173 | cleanups = make_cleanup (null_cleanup, NULL); | |
6174 | ||
6aa5f3a6 DE |
6175 | if (use_existing_cu && this_cu->cu != NULL) |
6176 | { | |
6177 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6178 | cu = this_cu->cu; | |
6179 | /* There's no need to do the rereading_dwo_cu handling that | |
6180 | init_cutu_and_read_dies does since we don't read the stub. */ | |
6181 | } | |
6182 | else | |
6183 | { | |
6184 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6185 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6186 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
6187 | init_one_comp_unit (cu, this_cu); |
6188 | /* If an error occurs while loading, release our storage. */ | |
6189 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
6190 | } | |
6191 | ||
6192 | /* A future optimization, if needed, would be to use an existing | |
6193 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6194 | could share abbrev tables. */ | |
a2ce51a0 DE |
6195 | |
6196 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
6197 | 0 /* abbrev_table_provided */, | |
6198 | NULL /* stub_comp_unit_die */, | |
6199 | sig_type->dwo_unit->dwo_file->comp_dir, | |
6200 | &reader, &info_ptr, | |
6201 | &comp_unit_die, &has_children) == 0) | |
6202 | { | |
6203 | /* Dummy die. */ | |
6204 | do_cleanups (cleanups); | |
6205 | return; | |
6206 | } | |
6207 | ||
6208 | /* All the "real" work is done here. */ | |
6209 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6210 | ||
6aa5f3a6 | 6211 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
6212 | but the alternative is making the latter more complex. |
6213 | This function is only for the special case of using DWO files directly: | |
6214 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 6215 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 6216 | { |
6aa5f3a6 DE |
6217 | if (keep) |
6218 | { | |
6219 | /* We've successfully allocated this compilation unit. Let our | |
6220 | caller clean it up when finished with it. */ | |
6221 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6222 | |
6aa5f3a6 DE |
6223 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6224 | So we have to manually free the abbrev table. */ | |
6225 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 6226 | |
6aa5f3a6 DE |
6227 | /* Link this CU into read_in_chain. */ |
6228 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6229 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6230 | } | |
6231 | else | |
6232 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 6233 | } |
a2ce51a0 DE |
6234 | |
6235 | do_cleanups (cleanups); | |
6236 | } | |
6237 | ||
fd820528 | 6238 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6239 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6240 | |
f4dc4d17 DE |
6241 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6242 | Otherwise the table specified in the comp unit header is read in and used. | |
6243 | This is an optimization for when we already have the abbrev table. | |
6244 | ||
dee91e82 DE |
6245 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6246 | Otherwise, a new CU is allocated with xmalloc. | |
6247 | ||
6248 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
6249 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
6250 | ||
6251 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 6252 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 6253 | |
70221824 | 6254 | static void |
fd820528 | 6255 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 6256 | struct abbrev_table *abbrev_table, |
fd820528 DE |
6257 | int use_existing_cu, int keep, |
6258 | die_reader_func_ftype *die_reader_func, | |
6259 | void *data) | |
c906108c | 6260 | { |
dee91e82 | 6261 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6262 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6263 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 6264 | struct dwarf2_cu *cu; |
d521ce57 | 6265 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 6266 | struct die_reader_specs reader; |
d85a05f0 | 6267 | struct die_info *comp_unit_die; |
dee91e82 | 6268 | int has_children; |
d85a05f0 | 6269 | struct attribute *attr; |
365156ad | 6270 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 6271 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6272 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6273 | /* Non-zero if CU currently points to a DWO file and we need to |
6274 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6275 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6276 | int rereading_dwo_cu = 0; |
c906108c | 6277 | |
b4f54984 | 6278 | if (dwarf_die_debug) |
09406207 DE |
6279 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6280 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6281 | to_underlying (this_cu->sect_off)); |
09406207 | 6282 | |
dee91e82 DE |
6283 | if (use_existing_cu) |
6284 | gdb_assert (keep); | |
23745b47 | 6285 | |
a2ce51a0 DE |
6286 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6287 | file (instead of going through the stub), short-circuit all of this. */ | |
6288 | if (this_cu->reading_dwo_directly) | |
6289 | { | |
6290 | /* Narrow down the scope of possibilities to have to understand. */ | |
6291 | gdb_assert (this_cu->is_debug_types); | |
6292 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
6293 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
6294 | die_reader_func, data); | |
a2ce51a0 DE |
6295 | return; |
6296 | } | |
6297 | ||
dee91e82 DE |
6298 | cleanups = make_cleanup (null_cleanup, NULL); |
6299 | ||
6300 | /* This is cheap if the section is already read in. */ | |
6301 | dwarf2_read_section (objfile, section); | |
6302 | ||
9c541725 | 6303 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6304 | |
6305 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6306 | |
6307 | if (use_existing_cu && this_cu->cu != NULL) | |
6308 | { | |
6309 | cu = this_cu->cu; | |
42e7ad6c DE |
6310 | /* If this CU is from a DWO file we need to start over, we need to |
6311 | refetch the attributes from the skeleton CU. | |
6312 | This could be optimized by retrieving those attributes from when we | |
6313 | were here the first time: the previous comp_unit_die was stored in | |
6314 | comp_unit_obstack. But there's no data yet that we need this | |
6315 | optimization. */ | |
6316 | if (cu->dwo_unit != NULL) | |
6317 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6318 | } |
6319 | else | |
6320 | { | |
6321 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6322 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 6323 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 6324 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 6325 | /* If an error occurs while loading, release our storage. */ |
365156ad | 6326 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 6327 | } |
dee91e82 | 6328 | |
b0c7bfa9 | 6329 | /* Get the header. */ |
9c541725 | 6330 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6331 | { |
6332 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6333 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6334 | } |
6335 | else | |
6336 | { | |
3019eac3 | 6337 | if (this_cu->is_debug_types) |
dee91e82 | 6338 | { |
43988095 | 6339 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 6340 | abbrev_section, info_ptr, |
43988095 | 6341 | rcuh_kind::TYPE); |
dee91e82 | 6342 | |
42e7ad6c DE |
6343 | /* Since per_cu is the first member of struct signatured_type, |
6344 | we can go from a pointer to one to a pointer to the other. */ | |
6345 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6346 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6347 | gdb_assert (sig_type->type_offset_in_tu |
6348 | == cu->header.type_cu_offset_in_tu); | |
6349 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6350 | |
42e7ad6c DE |
6351 | /* LENGTH has not been set yet for type units if we're |
6352 | using .gdb_index. */ | |
1ce1cefd | 6353 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
6354 | |
6355 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6356 | sig_type->type_offset_in_section = |
6357 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6358 | |
6359 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6360 | } |
6361 | else | |
6362 | { | |
4bdcc0c1 DE |
6363 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
6364 | abbrev_section, | |
43988095 JK |
6365 | info_ptr, |
6366 | rcuh_kind::COMPILE); | |
dee91e82 | 6367 | |
9c541725 | 6368 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 6369 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 6370 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6371 | } |
6372 | } | |
10b3939b | 6373 | |
6caca83c | 6374 | /* Skip dummy compilation units. */ |
dee91e82 | 6375 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
6376 | || peek_abbrev_code (abfd, info_ptr) == 0) |
6377 | { | |
dee91e82 | 6378 | do_cleanups (cleanups); |
21b2bd31 | 6379 | return; |
6caca83c CC |
6380 | } |
6381 | ||
433df2d4 DE |
6382 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6383 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
6384 | done. Note that it's important that if the CU had an abbrev table |
6385 | on entry we don't free it when we're done: Somewhere up the call stack | |
6386 | it may be in use. */ | |
f4dc4d17 DE |
6387 | if (abbrev_table != NULL) |
6388 | { | |
6389 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 6390 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
6391 | cu->abbrev_table = abbrev_table; |
6392 | } | |
6393 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 6394 | { |
4bdcc0c1 | 6395 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
6396 | make_cleanup (dwarf2_free_abbrev_table, cu); |
6397 | } | |
42e7ad6c DE |
6398 | else if (rereading_dwo_cu) |
6399 | { | |
6400 | dwarf2_free_abbrev_table (cu); | |
6401 | dwarf2_read_abbrevs (cu, abbrev_section); | |
6402 | } | |
af703f96 | 6403 | |
dee91e82 | 6404 | /* Read the top level CU/TU die. */ |
3019eac3 | 6405 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 6406 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 6407 | |
b0c7bfa9 DE |
6408 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
6409 | from the DWO file. | |
6410 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
6411 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
6412 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
6413 | if (attr) | |
6414 | { | |
3019eac3 | 6415 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6416 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
6417 | |
6418 | if (has_children) | |
6a506a2d DE |
6419 | { |
6420 | complaint (&symfile_complaints, | |
6421 | _("compilation unit with DW_AT_GNU_dwo_name" | |
6422 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 6423 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 6424 | } |
b0c7bfa9 | 6425 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 6426 | if (dwo_unit != NULL) |
3019eac3 | 6427 | { |
6a506a2d DE |
6428 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
6429 | abbrev_table != NULL, | |
a2ce51a0 | 6430 | comp_unit_die, NULL, |
6a506a2d DE |
6431 | &reader, &info_ptr, |
6432 | &dwo_comp_unit_die, &has_children) == 0) | |
6433 | { | |
6434 | /* Dummy die. */ | |
6435 | do_cleanups (cleanups); | |
6436 | return; | |
6437 | } | |
6438 | comp_unit_die = dwo_comp_unit_die; | |
6439 | } | |
6440 | else | |
6441 | { | |
6442 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6443 | the stub. A complaint has already been logged. There's | |
6444 | not much more we can do except pass on the stub DIE to | |
6445 | die_reader_func. We don't want to throw an error on bad | |
6446 | debug info. */ | |
3019eac3 DE |
6447 | } |
6448 | } | |
6449 | ||
b0c7bfa9 | 6450 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
6451 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
6452 | ||
b0c7bfa9 | 6453 | /* Done, clean up. */ |
365156ad | 6454 | if (free_cu_cleanup != NULL) |
348e048f | 6455 | { |
365156ad TT |
6456 | if (keep) |
6457 | { | |
6458 | /* We've successfully allocated this compilation unit. Let our | |
6459 | caller clean it up when finished with it. */ | |
6460 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 6461 | |
365156ad TT |
6462 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
6463 | So we have to manually free the abbrev table. */ | |
6464 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 6465 | |
365156ad TT |
6466 | /* Link this CU into read_in_chain. */ |
6467 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
6468 | dwarf2_per_objfile->read_in_chain = this_cu; | |
6469 | } | |
6470 | else | |
6471 | do_cleanups (free_cu_cleanup); | |
348e048f | 6472 | } |
365156ad TT |
6473 | |
6474 | do_cleanups (cleanups); | |
dee91e82 DE |
6475 | } |
6476 | ||
33e80786 DE |
6477 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
6478 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
6479 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6480 | |
6481 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6482 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6483 | |
6484 | We fill in THIS_CU->length. | |
6485 | ||
6486 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
6487 | linker) then DIE_READER_FUNC will not get called. | |
6488 | ||
6489 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6490 | This is done in order to not leave THIS_CU->cu in a state where we have |
6491 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
6492 | |
6493 | static void | |
6494 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 6495 | struct dwo_file *dwo_file, |
dee91e82 DE |
6496 | die_reader_func_ftype *die_reader_func, |
6497 | void *data) | |
6498 | { | |
6499 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 6500 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 6501 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 6502 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 6503 | struct dwarf2_cu cu; |
d521ce57 | 6504 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
6505 | struct die_reader_specs reader; |
6506 | struct cleanup *cleanups; | |
6507 | struct die_info *comp_unit_die; | |
6508 | int has_children; | |
6509 | ||
b4f54984 | 6510 | if (dwarf_die_debug) |
09406207 DE |
6511 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
6512 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6513 | to_underlying (this_cu->sect_off)); |
09406207 | 6514 | |
dee91e82 DE |
6515 | gdb_assert (this_cu->cu == NULL); |
6516 | ||
33e80786 DE |
6517 | abbrev_section = (dwo_file != NULL |
6518 | ? &dwo_file->sections.abbrev | |
6519 | : get_abbrev_section_for_cu (this_cu)); | |
6520 | ||
dee91e82 DE |
6521 | /* This is cheap if the section is already read in. */ |
6522 | dwarf2_read_section (objfile, section); | |
6523 | ||
6524 | init_one_comp_unit (&cu, this_cu); | |
6525 | ||
6526 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
6527 | ||
9c541725 | 6528 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
6529 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
6530 | abbrev_section, info_ptr, | |
43988095 JK |
6531 | (this_cu->is_debug_types |
6532 | ? rcuh_kind::TYPE | |
6533 | : rcuh_kind::COMPILE)); | |
dee91e82 | 6534 | |
1ce1cefd | 6535 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
6536 | |
6537 | /* Skip dummy compilation units. */ | |
6538 | if (info_ptr >= begin_info_ptr + this_cu->length | |
6539 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 6540 | { |
dee91e82 | 6541 | do_cleanups (cleanups); |
21b2bd31 | 6542 | return; |
93311388 | 6543 | } |
72bf9492 | 6544 | |
dee91e82 DE |
6545 | dwarf2_read_abbrevs (&cu, abbrev_section); |
6546 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
6547 | ||
3019eac3 | 6548 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
6549 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
6550 | ||
6551 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
6552 | ||
6553 | do_cleanups (cleanups); | |
6554 | } | |
6555 | ||
3019eac3 DE |
6556 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
6557 | does not lookup the specified DWO file. | |
6558 | This cannot be used to read DWO files. | |
dee91e82 DE |
6559 | |
6560 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
6561 | This is done in order to not leave THIS_CU->cu in a state where we have |
6562 | to care whether it refers to the "main" CU or the DWO CU. | |
6563 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
6564 | |
6565 | static void | |
6566 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
6567 | die_reader_func_ftype *die_reader_func, | |
6568 | void *data) | |
6569 | { | |
33e80786 | 6570 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 6571 | } |
0018ea6f DE |
6572 | \f |
6573 | /* Type Unit Groups. | |
dee91e82 | 6574 | |
0018ea6f DE |
6575 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
6576 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
6577 | so that all types coming from the same compilation (.o file) are grouped | |
6578 | together. A future step could be to put the types in the same symtab as | |
6579 | the CU the types ultimately came from. */ | |
ff013f42 | 6580 | |
f4dc4d17 DE |
6581 | static hashval_t |
6582 | hash_type_unit_group (const void *item) | |
6583 | { | |
9a3c8263 SM |
6584 | const struct type_unit_group *tu_group |
6585 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6586 | |
094b34ac | 6587 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6588 | } |
348e048f DE |
6589 | |
6590 | static int | |
f4dc4d17 | 6591 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6592 | { |
9a3c8263 SM |
6593 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6594 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6595 | |
094b34ac | 6596 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6597 | } |
348e048f | 6598 | |
f4dc4d17 DE |
6599 | /* Allocate a hash table for type unit groups. */ |
6600 | ||
6601 | static htab_t | |
6602 | allocate_type_unit_groups_table (void) | |
6603 | { | |
6604 | return htab_create_alloc_ex (3, | |
6605 | hash_type_unit_group, | |
6606 | eq_type_unit_group, | |
6607 | NULL, | |
6608 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6609 | hashtab_obstack_allocate, | |
6610 | dummy_obstack_deallocate); | |
6611 | } | |
dee91e82 | 6612 | |
f4dc4d17 DE |
6613 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6614 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6615 | of any one psymtab grow too big. */ | |
6616 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6617 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6618 | |
094b34ac | 6619 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6620 | Create the type_unit_group object used to hold one or more TUs. */ |
6621 | ||
6622 | static struct type_unit_group * | |
094b34ac | 6623 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6624 | { |
6625 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6626 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6627 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6628 | |
6629 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6630 | struct type_unit_group); | |
094b34ac | 6631 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6632 | per_cu->objfile = objfile; |
f4dc4d17 | 6633 | |
094b34ac DE |
6634 | if (dwarf2_per_objfile->using_index) |
6635 | { | |
6636 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6637 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6638 | } |
6639 | else | |
6640 | { | |
9c541725 | 6641 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6642 | struct partial_symtab *pst; |
6643 | char *name; | |
6644 | ||
6645 | /* Give the symtab a useful name for debug purposes. */ | |
6646 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6647 | name = xstrprintf ("<type_units_%d>", | |
6648 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6649 | else | |
6650 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6651 | ||
6652 | pst = create_partial_symtab (per_cu, name); | |
6653 | pst->anonymous = 1; | |
f4dc4d17 | 6654 | |
094b34ac DE |
6655 | xfree (name); |
6656 | } | |
f4dc4d17 | 6657 | |
094b34ac | 6658 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6659 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6660 | |
6661 | return tu_group; | |
6662 | } | |
6663 | ||
094b34ac DE |
6664 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6665 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6666 | |
6667 | static struct type_unit_group * | |
ff39bb5e | 6668 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6669 | { |
6670 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6671 | struct type_unit_group *tu_group; | |
6672 | void **slot; | |
6673 | unsigned int line_offset; | |
6674 | struct type_unit_group type_unit_group_for_lookup; | |
6675 | ||
6676 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6677 | { | |
6678 | dwarf2_per_objfile->type_unit_groups = | |
6679 | allocate_type_unit_groups_table (); | |
6680 | } | |
6681 | ||
6682 | /* Do we need to create a new group, or can we use an existing one? */ | |
6683 | ||
6684 | if (stmt_list) | |
6685 | { | |
6686 | line_offset = DW_UNSND (stmt_list); | |
6687 | ++tu_stats->nr_symtab_sharers; | |
6688 | } | |
6689 | else | |
6690 | { | |
6691 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6692 | We can do various things here like create one group per TU or | |
6693 | spread them over multiple groups to split up the expansion work. | |
6694 | To avoid worst case scenarios (too many groups or too large groups) | |
6695 | we, umm, group them in bunches. */ | |
6696 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6697 | | (tu_stats->nr_stmt_less_type_units | |
6698 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6699 | ++tu_stats->nr_stmt_less_type_units; | |
6700 | } | |
6701 | ||
094b34ac | 6702 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6703 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6704 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6705 | &type_unit_group_for_lookup, INSERT); | |
6706 | if (*slot != NULL) | |
6707 | { | |
9a3c8263 | 6708 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6709 | gdb_assert (tu_group != NULL); |
6710 | } | |
6711 | else | |
6712 | { | |
9c541725 | 6713 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6714 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6715 | *slot = tu_group; |
6716 | ++tu_stats->nr_symtabs; | |
6717 | } | |
6718 | ||
6719 | return tu_group; | |
6720 | } | |
0018ea6f DE |
6721 | \f |
6722 | /* Partial symbol tables. */ | |
6723 | ||
6724 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6725 | ||
6726 | The caller must fill in the following details: | |
6727 | dirname, textlow, texthigh. */ | |
6728 | ||
6729 | static struct partial_symtab * | |
6730 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
6731 | { | |
6732 | struct objfile *objfile = per_cu->objfile; | |
6733 | struct partial_symtab *pst; | |
6734 | ||
18a94d75 | 6735 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
6736 | objfile->global_psymbols, |
6737 | objfile->static_psymbols); | |
0018ea6f DE |
6738 | |
6739 | pst->psymtabs_addrmap_supported = 1; | |
6740 | ||
6741 | /* This is the glue that links PST into GDB's symbol API. */ | |
6742 | pst->read_symtab_private = per_cu; | |
6743 | pst->read_symtab = dwarf2_read_symtab; | |
6744 | per_cu->v.psymtab = pst; | |
6745 | ||
6746 | return pst; | |
6747 | } | |
6748 | ||
b93601f3 TT |
6749 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
6750 | type. */ | |
6751 | ||
6752 | struct process_psymtab_comp_unit_data | |
6753 | { | |
6754 | /* True if we are reading a DW_TAG_partial_unit. */ | |
6755 | ||
6756 | int want_partial_unit; | |
6757 | ||
6758 | /* The "pretend" language that is used if the CU doesn't declare a | |
6759 | language. */ | |
6760 | ||
6761 | enum language pretend_language; | |
6762 | }; | |
6763 | ||
0018ea6f DE |
6764 | /* die_reader_func for process_psymtab_comp_unit. */ |
6765 | ||
6766 | static void | |
6767 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6768 | const gdb_byte *info_ptr, |
0018ea6f DE |
6769 | struct die_info *comp_unit_die, |
6770 | int has_children, | |
6771 | void *data) | |
6772 | { | |
6773 | struct dwarf2_cu *cu = reader->cu; | |
6774 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 6775 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 6776 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
6777 | CORE_ADDR baseaddr; |
6778 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
6779 | struct partial_symtab *pst; | |
3a2b436a | 6780 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 6781 | const char *filename; |
9a3c8263 SM |
6782 | struct process_psymtab_comp_unit_data *info |
6783 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 6784 | |
b93601f3 | 6785 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
6786 | return; |
6787 | ||
6788 | gdb_assert (! per_cu->is_debug_types); | |
6789 | ||
b93601f3 | 6790 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
6791 | |
6792 | cu->list_in_scope = &file_symbols; | |
6793 | ||
6794 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
6795 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
6796 | if (filename == NULL) | |
0018ea6f | 6797 | filename = ""; |
0018ea6f DE |
6798 | |
6799 | pst = create_partial_symtab (per_cu, filename); | |
6800 | ||
6801 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 6802 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
6803 | |
6804 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6805 | ||
6806 | dwarf2_find_base_address (comp_unit_die, cu); | |
6807 | ||
6808 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6809 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6810 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6811 | &best_highpc, cu, pst); | |
6812 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
6813 | /* Store the contiguous range if it is not empty; it can be empty for |
6814 | CUs with no code. */ | |
6815 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
6816 | gdbarch_adjust_dwarf2_addr (gdbarch, |
6817 | best_lowpc + baseaddr), | |
6818 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
6819 | best_highpc + baseaddr) - 1, | |
6820 | pst); | |
0018ea6f DE |
6821 | |
6822 | /* Check if comp unit has_children. | |
6823 | If so, read the rest of the partial symbols from this comp unit. | |
6824 | If not, there's no more debug_info for this comp unit. */ | |
6825 | if (has_children) | |
6826 | { | |
6827 | struct partial_die_info *first_die; | |
6828 | CORE_ADDR lowpc, highpc; | |
6829 | ||
6830 | lowpc = ((CORE_ADDR) -1); | |
6831 | highpc = ((CORE_ADDR) 0); | |
6832 | ||
6833 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6834 | ||
6835 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6836 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6837 | |
6838 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6839 | complaints from `maint check'. */ | |
6840 | if (lowpc == ((CORE_ADDR) -1)) | |
6841 | lowpc = highpc; | |
6842 | ||
6843 | /* If the compilation unit didn't have an explicit address range, | |
6844 | then use the information extracted from its child dies. */ | |
e385593e | 6845 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6846 | { |
6847 | best_lowpc = lowpc; | |
6848 | best_highpc = highpc; | |
6849 | } | |
6850 | } | |
3e29f34a MR |
6851 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6852 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6853 | |
8763cede | 6854 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6855 | |
6856 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6857 | { | |
6858 | int i; | |
6859 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6860 | struct dwarf2_per_cu_data *iter; | |
6861 | ||
6862 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6863 | post-pass. */ | |
6864 | pst->number_of_dependencies = len; | |
8d749320 SM |
6865 | pst->dependencies = |
6866 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6867 | for (i = 0; |
6868 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6869 | i, iter); | |
6870 | ++i) | |
6871 | pst->dependencies[i] = iter->v.psymtab; | |
6872 | ||
6873 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6874 | } | |
6875 | ||
6876 | /* Get the list of files included in the current compilation unit, | |
6877 | and build a psymtab for each of them. */ | |
6878 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6879 | ||
b4f54984 | 6880 | if (dwarf_read_debug) |
0018ea6f DE |
6881 | { |
6882 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6883 | ||
6884 | fprintf_unfiltered (gdb_stdlog, | |
6885 | "Psymtab for %s unit @0x%x: %s - %s" | |
6886 | ", %d global, %d static syms\n", | |
6887 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6888 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
6889 | paddress (gdbarch, pst->textlow), |
6890 | paddress (gdbarch, pst->texthigh), | |
6891 | pst->n_global_syms, pst->n_static_syms); | |
6892 | } | |
6893 | } | |
6894 | ||
6895 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6896 | Process compilation unit THIS_CU for a psymtab. */ | |
6897 | ||
6898 | static void | |
6899 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6900 | int want_partial_unit, |
6901 | enum language pretend_language) | |
0018ea6f DE |
6902 | { |
6903 | /* If this compilation unit was already read in, free the | |
6904 | cached copy in order to read it in again. This is | |
6905 | necessary because we skipped some symbols when we first | |
6906 | read in the compilation unit (see load_partial_dies). | |
6907 | This problem could be avoided, but the benefit is unclear. */ | |
6908 | if (this_cu->cu != NULL) | |
6909 | free_one_cached_comp_unit (this_cu); | |
6910 | ||
f1902523 JK |
6911 | if (this_cu->is_debug_types) |
6912 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
6913 | NULL); | |
6914 | else | |
6915 | { | |
6916 | process_psymtab_comp_unit_data info; | |
6917 | info.want_partial_unit = want_partial_unit; | |
6918 | info.pretend_language = pretend_language; | |
6919 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
6920 | process_psymtab_comp_unit_reader, &info); | |
6921 | } | |
0018ea6f DE |
6922 | |
6923 | /* Age out any secondary CUs. */ | |
6924 | age_cached_comp_units (); | |
6925 | } | |
f4dc4d17 DE |
6926 | |
6927 | /* Reader function for build_type_psymtabs. */ | |
6928 | ||
6929 | static void | |
6930 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6931 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6932 | struct die_info *type_unit_die, |
6933 | int has_children, | |
6934 | void *data) | |
6935 | { | |
6936 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6937 | struct dwarf2_cu *cu = reader->cu; | |
6938 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6939 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6940 | struct type_unit_group *tu_group; |
6941 | struct attribute *attr; | |
6942 | struct partial_die_info *first_die; | |
6943 | CORE_ADDR lowpc, highpc; | |
6944 | struct partial_symtab *pst; | |
6945 | ||
6946 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6947 | gdb_assert (per_cu->is_debug_types); |
6948 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6949 | |
6950 | if (! has_children) | |
6951 | return; | |
6952 | ||
6953 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6954 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6955 | |
0186c6a7 | 6956 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6957 | |
6958 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6959 | cu->list_in_scope = &file_symbols; | |
6960 | pst = create_partial_symtab (per_cu, ""); | |
6961 | pst->anonymous = 1; | |
6962 | ||
6963 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6964 | ||
6965 | lowpc = (CORE_ADDR) -1; | |
6966 | highpc = (CORE_ADDR) 0; | |
6967 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6968 | ||
8763cede | 6969 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6970 | } |
6971 | ||
73051182 DE |
6972 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6973 | ||
6974 | struct tu_abbrev_offset | |
6975 | { | |
6976 | struct signatured_type *sig_type; | |
6977 | sect_offset abbrev_offset; | |
6978 | }; | |
6979 | ||
6980 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6981 | ||
6982 | static int | |
6983 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6984 | { | |
9a3c8263 SM |
6985 | const struct tu_abbrev_offset * const *a |
6986 | = (const struct tu_abbrev_offset * const*) ap; | |
6987 | const struct tu_abbrev_offset * const *b | |
6988 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
6989 | sect_offset aoff = (*a)->abbrev_offset; |
6990 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
6991 | |
6992 | return (aoff > boff) - (aoff < boff); | |
6993 | } | |
6994 | ||
6995 | /* Efficiently read all the type units. | |
6996 | This does the bulk of the work for build_type_psymtabs. | |
6997 | ||
6998 | The efficiency is because we sort TUs by the abbrev table they use and | |
6999 | only read each abbrev table once. In one program there are 200K TUs | |
7000 | sharing 8K abbrev tables. | |
7001 | ||
7002 | The main purpose of this function is to support building the | |
7003 | dwarf2_per_objfile->type_unit_groups table. | |
7004 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7005 | can collapse the search space by grouping them by stmt_list. | |
7006 | The savings can be significant, in the same program from above the 200K TUs | |
7007 | share 8K stmt_list tables. | |
7008 | ||
7009 | FUNC is expected to call get_type_unit_group, which will create the | |
7010 | struct type_unit_group if necessary and add it to | |
7011 | dwarf2_per_objfile->type_unit_groups. */ | |
7012 | ||
7013 | static void | |
7014 | build_type_psymtabs_1 (void) | |
7015 | { | |
73051182 DE |
7016 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7017 | struct cleanup *cleanups; | |
7018 | struct abbrev_table *abbrev_table; | |
7019 | sect_offset abbrev_offset; | |
7020 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
7021 | int i; |
7022 | ||
7023 | /* It's up to the caller to not call us multiple times. */ | |
7024 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7025 | ||
7026 | if (dwarf2_per_objfile->n_type_units == 0) | |
7027 | return; | |
7028 | ||
7029 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7030 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7031 | read each abbrev table in. | |
7032 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7033 | This is simpler and efficient enough for now. | |
7034 | ||
7035 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7036 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7037 | stmt_list value too so in practice this should work well. | |
7038 | ||
7039 | The basic algorithm here is: | |
7040 | ||
7041 | sort TUs by abbrev table | |
7042 | for each TU with same abbrev table: | |
7043 | read abbrev table if first user | |
7044 | read TU top level DIE | |
7045 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7046 | call FUNC */ | |
7047 | ||
b4f54984 | 7048 | if (dwarf_read_debug) |
73051182 DE |
7049 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7050 | ||
7051 | /* Sort in a separate table to maintain the order of all_type_units | |
7052 | for .gdb_index: TU indices directly index all_type_units. */ | |
7053 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
7054 | dwarf2_per_objfile->n_type_units); | |
7055 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7056 | { | |
7057 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
7058 | ||
7059 | sorted_by_abbrev[i].sig_type = sig_type; | |
7060 | sorted_by_abbrev[i].abbrev_offset = | |
7061 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 7062 | sig_type->per_cu.sect_off); |
73051182 DE |
7063 | } |
7064 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
7065 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
7066 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
7067 | ||
9c541725 | 7068 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
7069 | abbrev_table = NULL; |
7070 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
7071 | ||
7072 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
7073 | { | |
7074 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
7075 | ||
7076 | /* Switch to the next abbrev table if necessary. */ | |
7077 | if (abbrev_table == NULL | |
9c541725 | 7078 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
7079 | { |
7080 | if (abbrev_table != NULL) | |
7081 | { | |
7082 | abbrev_table_free (abbrev_table); | |
7083 | /* Reset to NULL in case abbrev_table_read_table throws | |
7084 | an error: abbrev_table_free_cleanup will get called. */ | |
7085 | abbrev_table = NULL; | |
7086 | } | |
7087 | abbrev_offset = tu->abbrev_offset; | |
7088 | abbrev_table = | |
7089 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
7090 | abbrev_offset); | |
7091 | ++tu_stats->nr_uniq_abbrev_tables; | |
7092 | } | |
7093 | ||
7094 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
7095 | build_type_psymtabs_reader, NULL); | |
7096 | } | |
7097 | ||
73051182 | 7098 | do_cleanups (cleanups); |
6aa5f3a6 | 7099 | } |
73051182 | 7100 | |
6aa5f3a6 DE |
7101 | /* Print collected type unit statistics. */ |
7102 | ||
7103 | static void | |
7104 | print_tu_stats (void) | |
7105 | { | |
7106 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7107 | ||
7108 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
7109 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
7110 | dwarf2_per_objfile->n_type_units); | |
7111 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
7112 | tu_stats->nr_uniq_abbrev_tables); | |
7113 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7114 | tu_stats->nr_symtabs); | |
7115 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7116 | tu_stats->nr_symtab_sharers); | |
7117 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7118 | tu_stats->nr_stmt_less_type_units); | |
7119 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7120 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7121 | } |
7122 | ||
f4dc4d17 DE |
7123 | /* Traversal function for build_type_psymtabs. */ |
7124 | ||
7125 | static int | |
7126 | build_type_psymtab_dependencies (void **slot, void *info) | |
7127 | { | |
7128 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
7129 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7130 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 7131 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
7132 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
7133 | struct signatured_type *iter; | |
f4dc4d17 DE |
7134 | int i; |
7135 | ||
7136 | gdb_assert (len > 0); | |
0186c6a7 | 7137 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
7138 | |
7139 | pst->number_of_dependencies = len; | |
8d749320 SM |
7140 | pst->dependencies = |
7141 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 7142 | for (i = 0; |
0186c6a7 | 7143 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
7144 | ++i) |
7145 | { | |
0186c6a7 DE |
7146 | gdb_assert (iter->per_cu.is_debug_types); |
7147 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7148 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7149 | } |
7150 | ||
0186c6a7 | 7151 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
7152 | |
7153 | return 1; | |
7154 | } | |
7155 | ||
7156 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7157 | Build partial symbol tables for the .debug_types comp-units. */ | |
7158 | ||
7159 | static void | |
7160 | build_type_psymtabs (struct objfile *objfile) | |
7161 | { | |
0e50663e | 7162 | if (! create_all_type_units (objfile)) |
348e048f DE |
7163 | return; |
7164 | ||
73051182 | 7165 | build_type_psymtabs_1 (); |
6aa5f3a6 | 7166 | } |
f4dc4d17 | 7167 | |
6aa5f3a6 DE |
7168 | /* Traversal function for process_skeletonless_type_unit. |
7169 | Read a TU in a DWO file and build partial symbols for it. */ | |
7170 | ||
7171 | static int | |
7172 | process_skeletonless_type_unit (void **slot, void *info) | |
7173 | { | |
7174 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 7175 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
7176 | struct signatured_type find_entry, *entry; |
7177 | ||
7178 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7179 | ||
7180 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7181 | { | |
7182 | dwarf2_per_objfile->signatured_types | |
7183 | = allocate_signatured_type_table (objfile); | |
7184 | } | |
7185 | ||
7186 | find_entry.signature = dwo_unit->signature; | |
7187 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
7188 | INSERT); | |
7189 | /* If we've already seen this type there's nothing to do. What's happening | |
7190 | is we're doing our own version of comdat-folding here. */ | |
7191 | if (*slot != NULL) | |
7192 | return 1; | |
7193 | ||
7194 | /* This does the job that create_all_type_units would have done for | |
7195 | this TU. */ | |
7196 | entry = add_type_unit (dwo_unit->signature, slot); | |
7197 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
7198 | *slot = entry; | |
7199 | ||
7200 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
7201 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
7202 | build_type_psymtabs_reader, NULL); | |
7203 | ||
7204 | return 1; | |
7205 | } | |
7206 | ||
7207 | /* Traversal function for process_skeletonless_type_units. */ | |
7208 | ||
7209 | static int | |
7210 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7211 | { | |
7212 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7213 | ||
7214 | if (dwo_file->tus != NULL) | |
7215 | { | |
7216 | htab_traverse_noresize (dwo_file->tus, | |
7217 | process_skeletonless_type_unit, info); | |
7218 | } | |
7219 | ||
7220 | return 1; | |
7221 | } | |
7222 | ||
7223 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7224 | This is needed in case a TU was emitted without its skeleton. | |
7225 | Note: This can't be done until we know what all the DWO files are. */ | |
7226 | ||
7227 | static void | |
7228 | process_skeletonless_type_units (struct objfile *objfile) | |
7229 | { | |
7230 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
7231 | if (get_dwp_file () == NULL | |
7232 | && dwarf2_per_objfile->dwo_files != NULL) | |
7233 | { | |
7234 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
7235 | process_dwo_file_for_skeletonless_type_units, | |
7236 | objfile); | |
7237 | } | |
348e048f DE |
7238 | } |
7239 | ||
95554aad TT |
7240 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
7241 | ||
7242 | static void | |
7243 | set_partial_user (struct objfile *objfile) | |
7244 | { | |
7245 | int i; | |
7246 | ||
7247 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
7248 | { | |
8832e7e3 | 7249 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
7250 | struct partial_symtab *pst = per_cu->v.psymtab; |
7251 | int j; | |
7252 | ||
36586728 TT |
7253 | if (pst == NULL) |
7254 | continue; | |
7255 | ||
95554aad TT |
7256 | for (j = 0; j < pst->number_of_dependencies; ++j) |
7257 | { | |
7258 | /* Set the 'user' field only if it is not already set. */ | |
7259 | if (pst->dependencies[j]->user == NULL) | |
7260 | pst->dependencies[j]->user = pst; | |
7261 | } | |
7262 | } | |
7263 | } | |
7264 | ||
93311388 DE |
7265 | /* Build the partial symbol table by doing a quick pass through the |
7266 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7267 | |
93311388 | 7268 | static void |
c67a9c90 | 7269 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 7270 | { |
791afaa2 | 7271 | struct cleanup *back_to; |
21b2bd31 | 7272 | int i; |
93311388 | 7273 | |
b4f54984 | 7274 | if (dwarf_read_debug) |
45cfd468 DE |
7275 | { |
7276 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7277 | objfile_name (objfile)); |
45cfd468 DE |
7278 | } |
7279 | ||
98bfdba5 PA |
7280 | dwarf2_per_objfile->reading_partial_symbols = 1; |
7281 | ||
be391dca | 7282 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 7283 | |
93311388 DE |
7284 | /* Any cached compilation units will be linked by the per-objfile |
7285 | read_in_chain. Make sure to free them when we're done. */ | |
7286 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 7287 | |
348e048f DE |
7288 | build_type_psymtabs (objfile); |
7289 | ||
93311388 | 7290 | create_all_comp_units (objfile); |
c906108c | 7291 | |
60606b2c TT |
7292 | /* Create a temporary address map on a temporary obstack. We later |
7293 | copy this to the final obstack. */ | |
8268c778 | 7294 | auto_obstack temp_obstack; |
791afaa2 TT |
7295 | |
7296 | scoped_restore save_psymtabs_addrmap | |
7297 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
7298 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 7299 | |
21b2bd31 | 7300 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 7301 | { |
8832e7e3 | 7302 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 7303 | |
b93601f3 | 7304 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 7305 | } |
ff013f42 | 7306 | |
6aa5f3a6 DE |
7307 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
7308 | process_skeletonless_type_units (objfile); | |
7309 | ||
7310 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7311 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7312 | { | |
7313 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
7314 | build_type_psymtab_dependencies, NULL); | |
7315 | } | |
7316 | ||
b4f54984 | 7317 | if (dwarf_read_debug) |
6aa5f3a6 DE |
7318 | print_tu_stats (); |
7319 | ||
95554aad TT |
7320 | set_partial_user (objfile); |
7321 | ||
ff013f42 JK |
7322 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
7323 | &objfile->objfile_obstack); | |
791afaa2 TT |
7324 | /* At this point we want to keep the address map. */ |
7325 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7326 | |
ae038cb0 | 7327 | do_cleanups (back_to); |
45cfd468 | 7328 | |
b4f54984 | 7329 | if (dwarf_read_debug) |
45cfd468 | 7330 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7331 | objfile_name (objfile)); |
ae038cb0 DJ |
7332 | } |
7333 | ||
3019eac3 | 7334 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
7335 | |
7336 | static void | |
dee91e82 | 7337 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 7338 | const gdb_byte *info_ptr, |
dee91e82 DE |
7339 | struct die_info *comp_unit_die, |
7340 | int has_children, | |
7341 | void *data) | |
ae038cb0 | 7342 | { |
dee91e82 | 7343 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 7344 | |
95554aad | 7345 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 7346 | |
ae038cb0 DJ |
7347 | /* Check if comp unit has_children. |
7348 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 7349 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 7350 | if (has_children) |
dee91e82 DE |
7351 | load_partial_dies (reader, info_ptr, 0); |
7352 | } | |
98bfdba5 | 7353 | |
dee91e82 DE |
7354 | /* Load the partial DIEs for a secondary CU into memory. |
7355 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7356 | |
dee91e82 DE |
7357 | static void |
7358 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7359 | { | |
f4dc4d17 DE |
7360 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7361 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
7362 | } |
7363 | ||
ae038cb0 | 7364 | static void |
36586728 TT |
7365 | read_comp_units_from_section (struct objfile *objfile, |
7366 | struct dwarf2_section_info *section, | |
f1902523 | 7367 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
7368 | unsigned int is_dwz, |
7369 | int *n_allocated, | |
7370 | int *n_comp_units, | |
7371 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 7372 | { |
d521ce57 | 7373 | const gdb_byte *info_ptr; |
a32a8923 | 7374 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 7375 | |
b4f54984 | 7376 | if (dwarf_read_debug) |
bf6af496 | 7377 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
7378 | get_section_name (section), |
7379 | get_section_file_name (section)); | |
bf6af496 | 7380 | |
36586728 | 7381 | dwarf2_read_section (objfile, section); |
ae038cb0 | 7382 | |
36586728 | 7383 | info_ptr = section->buffer; |
6e70227d | 7384 | |
36586728 | 7385 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7386 | { |
ae038cb0 | 7387 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7388 | |
9c541725 | 7389 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7390 | |
f1902523 JK |
7391 | comp_unit_head cu_header; |
7392 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
7393 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7394 | |
7395 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7396 | if (cu_header.unit_type != DW_UT_type) |
7397 | { | |
7398 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7399 | struct dwarf2_per_cu_data); | |
7400 | memset (this_cu, 0, sizeof (*this_cu)); | |
7401 | } | |
7402 | else | |
7403 | { | |
7404 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7405 | struct signatured_type); | |
7406 | memset (sig_type, 0, sizeof (*sig_type)); | |
7407 | sig_type->signature = cu_header.signature; | |
7408 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7409 | this_cu = &sig_type->per_cu; | |
7410 | } | |
7411 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7412 | this_cu->sect_off = sect_off; |
f1902523 | 7413 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7414 | this_cu->is_dwz = is_dwz; |
9291a0cd | 7415 | this_cu->objfile = objfile; |
8a0459fd | 7416 | this_cu->section = section; |
ae038cb0 | 7417 | |
36586728 | 7418 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 7419 | { |
36586728 | 7420 | *n_allocated *= 2; |
224c3ddb SM |
7421 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
7422 | *all_comp_units, *n_allocated); | |
ae038cb0 | 7423 | } |
36586728 TT |
7424 | (*all_comp_units)[*n_comp_units] = this_cu; |
7425 | ++*n_comp_units; | |
ae038cb0 DJ |
7426 | |
7427 | info_ptr = info_ptr + this_cu->length; | |
7428 | } | |
36586728 TT |
7429 | } |
7430 | ||
7431 | /* Create a list of all compilation units in OBJFILE. | |
7432 | This is only done for -readnow and building partial symtabs. */ | |
7433 | ||
7434 | static void | |
7435 | create_all_comp_units (struct objfile *objfile) | |
7436 | { | |
7437 | int n_allocated; | |
7438 | int n_comp_units; | |
7439 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 7440 | struct dwz_file *dwz; |
36586728 TT |
7441 | |
7442 | n_comp_units = 0; | |
7443 | n_allocated = 10; | |
8d749320 | 7444 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 7445 | |
f1902523 JK |
7446 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
7447 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
7448 | &n_allocated, &n_comp_units, &all_comp_units); |
7449 | ||
4db1a1dc TT |
7450 | dwz = dwarf2_get_dwz_file (); |
7451 | if (dwz != NULL) | |
f1902523 | 7452 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
7453 | &n_allocated, &n_comp_units, |
7454 | &all_comp_units); | |
ae038cb0 | 7455 | |
8d749320 SM |
7456 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
7457 | struct dwarf2_per_cu_data *, | |
7458 | n_comp_units); | |
ae038cb0 DJ |
7459 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
7460 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
7461 | xfree (all_comp_units); | |
7462 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
7463 | } |
7464 | ||
5734ee8b | 7465 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7466 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7467 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7468 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7469 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7470 | |
72bf9492 DJ |
7471 | static void |
7472 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7473 | CORE_ADDR *highpc, int set_addrmap, |
7474 | struct dwarf2_cu *cu) | |
c906108c | 7475 | { |
72bf9492 | 7476 | struct partial_die_info *pdi; |
c906108c | 7477 | |
91c24f0a DC |
7478 | /* Now, march along the PDI's, descending into ones which have |
7479 | interesting children but skipping the children of the other ones, | |
7480 | until we reach the end of the compilation unit. */ | |
c906108c | 7481 | |
72bf9492 | 7482 | pdi = first_die; |
91c24f0a | 7483 | |
72bf9492 DJ |
7484 | while (pdi != NULL) |
7485 | { | |
7486 | fixup_partial_die (pdi, cu); | |
c906108c | 7487 | |
f55ee35c | 7488 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7489 | children, so we need to look at them. Ditto for anonymous |
7490 | enums. */ | |
933c6fe4 | 7491 | |
72bf9492 | 7492 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
7493 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
7494 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 7495 | { |
72bf9492 | 7496 | switch (pdi->tag) |
c906108c SS |
7497 | { |
7498 | case DW_TAG_subprogram: | |
cdc07690 | 7499 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7500 | break; |
72929c62 | 7501 | case DW_TAG_constant: |
c906108c SS |
7502 | case DW_TAG_variable: |
7503 | case DW_TAG_typedef: | |
91c24f0a | 7504 | case DW_TAG_union_type: |
72bf9492 | 7505 | if (!pdi->is_declaration) |
63d06c5c | 7506 | { |
72bf9492 | 7507 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7508 | } |
7509 | break; | |
c906108c | 7510 | case DW_TAG_class_type: |
680b30c7 | 7511 | case DW_TAG_interface_type: |
c906108c | 7512 | case DW_TAG_structure_type: |
72bf9492 | 7513 | if (!pdi->is_declaration) |
c906108c | 7514 | { |
72bf9492 | 7515 | add_partial_symbol (pdi, cu); |
c906108c | 7516 | } |
e98c9e7c TT |
7517 | if (cu->language == language_rust && pdi->has_children) |
7518 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
7519 | set_addrmap, cu); | |
c906108c | 7520 | break; |
91c24f0a | 7521 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7522 | if (!pdi->is_declaration) |
7523 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7524 | break; |
7525 | case DW_TAG_base_type: | |
a02abb62 | 7526 | case DW_TAG_subrange_type: |
c906108c | 7527 | /* File scope base type definitions are added to the partial |
c5aa993b | 7528 | symbol table. */ |
72bf9492 | 7529 | add_partial_symbol (pdi, cu); |
c906108c | 7530 | break; |
d9fa45fe | 7531 | case DW_TAG_namespace: |
cdc07690 | 7532 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7533 | break; |
5d7cb8df | 7534 | case DW_TAG_module: |
cdc07690 | 7535 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 7536 | break; |
95554aad TT |
7537 | case DW_TAG_imported_unit: |
7538 | { | |
7539 | struct dwarf2_per_cu_data *per_cu; | |
7540 | ||
f4dc4d17 DE |
7541 | /* For now we don't handle imported units in type units. */ |
7542 | if (cu->per_cu->is_debug_types) | |
7543 | { | |
7544 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7545 | " supported in type units [in module %s]"), | |
4262abfb | 7546 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
7547 | } |
7548 | ||
9c541725 | 7549 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 7550 | pdi->is_dwz, |
95554aad TT |
7551 | cu->objfile); |
7552 | ||
7553 | /* Go read the partial unit, if needed. */ | |
7554 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 7555 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 7556 | |
f4dc4d17 | 7557 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 7558 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
7559 | } |
7560 | break; | |
74921315 KS |
7561 | case DW_TAG_imported_declaration: |
7562 | add_partial_symbol (pdi, cu); | |
7563 | break; | |
c906108c SS |
7564 | default: |
7565 | break; | |
7566 | } | |
7567 | } | |
7568 | ||
72bf9492 DJ |
7569 | /* If the die has a sibling, skip to the sibling. */ |
7570 | ||
7571 | pdi = pdi->die_sibling; | |
7572 | } | |
7573 | } | |
7574 | ||
7575 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7576 | |
72bf9492 | 7577 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7578 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7579 | Enumerators are an exception; they use the scope of their parent |
7580 | enumeration type, i.e. the name of the enumeration type is not | |
7581 | prepended to the enumerator. | |
91c24f0a | 7582 | |
72bf9492 DJ |
7583 | There are two complexities. One is DW_AT_specification; in this |
7584 | case "parent" means the parent of the target of the specification, | |
7585 | instead of the direct parent of the DIE. The other is compilers | |
7586 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7587 | the fully qualified name of structure types from their members' | |
7588 | linkage names. This must be done using the DIE's children rather | |
7589 | than the children of any DW_AT_specification target. We only need | |
7590 | to do this for structures at the top level, i.e. if the target of | |
7591 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7592 | have a parent. */ | |
7593 | ||
7594 | /* Compute the scope prefix associated with PDI's parent, in | |
7595 | compilation unit CU. The result will be allocated on CU's | |
7596 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7597 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7598 | static const char * |
72bf9492 DJ |
7599 | partial_die_parent_scope (struct partial_die_info *pdi, |
7600 | struct dwarf2_cu *cu) | |
7601 | { | |
15d034d0 | 7602 | const char *grandparent_scope; |
72bf9492 | 7603 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7604 | |
72bf9492 DJ |
7605 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7606 | then this means the parent of the specification DIE. */ | |
7607 | ||
7608 | real_pdi = pdi; | |
72bf9492 | 7609 | while (real_pdi->has_specification) |
36586728 TT |
7610 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7611 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7612 | |
7613 | parent = real_pdi->die_parent; | |
7614 | if (parent == NULL) | |
7615 | return NULL; | |
7616 | ||
7617 | if (parent->scope_set) | |
7618 | return parent->scope; | |
7619 | ||
7620 | fixup_partial_die (parent, cu); | |
7621 | ||
10b3939b | 7622 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7623 | |
acebe513 UW |
7624 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7625 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7626 | Work around this problem here. */ | |
7627 | if (cu->language == language_cplus | |
6e70227d | 7628 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7629 | && strcmp (parent->name, "::") == 0 |
7630 | && grandparent_scope == NULL) | |
7631 | { | |
7632 | parent->scope = NULL; | |
7633 | parent->scope_set = 1; | |
7634 | return NULL; | |
7635 | } | |
7636 | ||
9c6c53f7 SA |
7637 | if (pdi->tag == DW_TAG_enumerator) |
7638 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7639 | parent->scope = grandparent_scope; | |
7640 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7641 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7642 | || parent->tag == DW_TAG_structure_type |
7643 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7644 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7645 | || parent->tag == DW_TAG_union_type |
7646 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7647 | { |
7648 | if (grandparent_scope == NULL) | |
7649 | parent->scope = parent->name; | |
7650 | else | |
3e43a32a MS |
7651 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7652 | grandparent_scope, | |
f55ee35c | 7653 | parent->name, 0, cu); |
72bf9492 | 7654 | } |
72bf9492 DJ |
7655 | else |
7656 | { | |
7657 | /* FIXME drow/2004-04-01: What should we be doing with | |
7658 | function-local names? For partial symbols, we should probably be | |
7659 | ignoring them. */ | |
7660 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7661 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7662 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7663 | parent->scope = grandparent_scope; |
c906108c SS |
7664 | } |
7665 | ||
72bf9492 DJ |
7666 | parent->scope_set = 1; |
7667 | return parent->scope; | |
7668 | } | |
7669 | ||
7670 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7671 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7672 | |
72bf9492 DJ |
7673 | static char * |
7674 | partial_die_full_name (struct partial_die_info *pdi, | |
7675 | struct dwarf2_cu *cu) | |
7676 | { | |
15d034d0 | 7677 | const char *parent_scope; |
72bf9492 | 7678 | |
98bfdba5 PA |
7679 | /* If this is a template instantiation, we can not work out the |
7680 | template arguments from partial DIEs. So, unfortunately, we have | |
7681 | to go through the full DIEs. At least any work we do building | |
7682 | types here will be reused if full symbols are loaded later. */ | |
7683 | if (pdi->has_template_arguments) | |
7684 | { | |
7685 | fixup_partial_die (pdi, cu); | |
7686 | ||
7687 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7688 | { | |
7689 | struct die_info *die; | |
7690 | struct attribute attr; | |
7691 | struct dwarf2_cu *ref_cu = cu; | |
7692 | ||
b64f50a1 | 7693 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7694 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7695 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7696 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7697 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7698 | ||
7699 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7700 | } | |
7701 | } | |
7702 | ||
72bf9492 DJ |
7703 | parent_scope = partial_die_parent_scope (pdi, cu); |
7704 | if (parent_scope == NULL) | |
7705 | return NULL; | |
7706 | else | |
f55ee35c | 7707 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7708 | } |
7709 | ||
7710 | static void | |
72bf9492 | 7711 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7712 | { |
e7c27a73 | 7713 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7714 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7715 | CORE_ADDR addr = 0; |
15d034d0 | 7716 | const char *actual_name = NULL; |
e142c38c | 7717 | CORE_ADDR baseaddr; |
15d034d0 | 7718 | char *built_actual_name; |
e142c38c DJ |
7719 | |
7720 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7721 | |
15d034d0 TT |
7722 | built_actual_name = partial_die_full_name (pdi, cu); |
7723 | if (built_actual_name != NULL) | |
7724 | actual_name = built_actual_name; | |
63d06c5c | 7725 | |
72bf9492 DJ |
7726 | if (actual_name == NULL) |
7727 | actual_name = pdi->name; | |
7728 | ||
c906108c SS |
7729 | switch (pdi->tag) |
7730 | { | |
7731 | case DW_TAG_subprogram: | |
3e29f34a | 7732 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 7733 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 7734 | { |
2cfa0c8d JB |
7735 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
7736 | of the global scope. But in Ada, we want to be able to access | |
7737 | nested procedures globally. So all Ada subprograms are stored | |
7738 | in the global scope. */ | |
f47fb265 | 7739 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7740 | built_actual_name != NULL, |
f47fb265 MS |
7741 | VAR_DOMAIN, LOC_BLOCK, |
7742 | &objfile->global_psymbols, | |
1762568f | 7743 | addr, cu->language, objfile); |
c906108c SS |
7744 | } |
7745 | else | |
7746 | { | |
f47fb265 | 7747 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7748 | built_actual_name != NULL, |
f47fb265 MS |
7749 | VAR_DOMAIN, LOC_BLOCK, |
7750 | &objfile->static_psymbols, | |
1762568f | 7751 | addr, cu->language, objfile); |
c906108c | 7752 | } |
0c1b455e TT |
7753 | |
7754 | if (pdi->main_subprogram && actual_name != NULL) | |
7755 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7756 | break; |
72929c62 JB |
7757 | case DW_TAG_constant: |
7758 | { | |
af5bf4ad | 7759 | std::vector<partial_symbol *> *list; |
72929c62 JB |
7760 | |
7761 | if (pdi->is_external) | |
7762 | list = &objfile->global_psymbols; | |
7763 | else | |
7764 | list = &objfile->static_psymbols; | |
f47fb265 | 7765 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7766 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 7767 | list, 0, cu->language, objfile); |
72929c62 JB |
7768 | } |
7769 | break; | |
c906108c | 7770 | case DW_TAG_variable: |
95554aad TT |
7771 | if (pdi->d.locdesc) |
7772 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 7773 | |
95554aad | 7774 | if (pdi->d.locdesc |
caac4577 JG |
7775 | && addr == 0 |
7776 | && !dwarf2_per_objfile->has_section_at_zero) | |
7777 | { | |
7778 | /* A global or static variable may also have been stripped | |
7779 | out by the linker if unused, in which case its address | |
7780 | will be nullified; do not add such variables into partial | |
7781 | symbol table then. */ | |
7782 | } | |
7783 | else if (pdi->is_external) | |
c906108c SS |
7784 | { |
7785 | /* Global Variable. | |
7786 | Don't enter into the minimal symbol tables as there is | |
7787 | a minimal symbol table entry from the ELF symbols already. | |
7788 | Enter into partial symbol table if it has a location | |
7789 | descriptor or a type. | |
7790 | If the location descriptor is missing, new_symbol will create | |
7791 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
7792 | be determined from the minimal symbol table whenever the variable | |
7793 | is referenced. | |
7794 | The address for the partial symbol table entry is not | |
7795 | used by GDB, but it comes in handy for debugging partial symbol | |
7796 | table building. */ | |
7797 | ||
95554aad | 7798 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 7799 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7800 | built_actual_name != NULL, |
f47fb265 MS |
7801 | VAR_DOMAIN, LOC_STATIC, |
7802 | &objfile->global_psymbols, | |
1762568f | 7803 | addr + baseaddr, |
f47fb265 | 7804 | cu->language, objfile); |
c906108c SS |
7805 | } |
7806 | else | |
7807 | { | |
ff908ebf AW |
7808 | int has_loc = pdi->d.locdesc != NULL; |
7809 | ||
7810 | /* Static Variable. Skip symbols whose value we cannot know (those | |
7811 | without location descriptors or constant values). */ | |
7812 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 7813 | { |
15d034d0 | 7814 | xfree (built_actual_name); |
decbce07 MS |
7815 | return; |
7816 | } | |
ff908ebf | 7817 | |
f47fb265 | 7818 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7819 | built_actual_name != NULL, |
f47fb265 MS |
7820 | VAR_DOMAIN, LOC_STATIC, |
7821 | &objfile->static_psymbols, | |
ff908ebf | 7822 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 7823 | cu->language, objfile); |
c906108c SS |
7824 | } |
7825 | break; | |
7826 | case DW_TAG_typedef: | |
7827 | case DW_TAG_base_type: | |
a02abb62 | 7828 | case DW_TAG_subrange_type: |
38d518c9 | 7829 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7830 | built_actual_name != NULL, |
176620f1 | 7831 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 7832 | &objfile->static_psymbols, |
1762568f | 7833 | 0, cu->language, objfile); |
c906108c | 7834 | break; |
74921315 | 7835 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
7836 | case DW_TAG_namespace: |
7837 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 7838 | built_actual_name != NULL, |
72bf9492 DJ |
7839 | VAR_DOMAIN, LOC_TYPEDEF, |
7840 | &objfile->global_psymbols, | |
1762568f | 7841 | 0, cu->language, objfile); |
72bf9492 | 7842 | break; |
530e8392 KB |
7843 | case DW_TAG_module: |
7844 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7845 | built_actual_name != NULL, | |
7846 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7847 | &objfile->global_psymbols, | |
1762568f | 7848 | 0, cu->language, objfile); |
530e8392 | 7849 | break; |
c906108c | 7850 | case DW_TAG_class_type: |
680b30c7 | 7851 | case DW_TAG_interface_type: |
c906108c SS |
7852 | case DW_TAG_structure_type: |
7853 | case DW_TAG_union_type: | |
7854 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7855 | /* Skip external references. The DWARF standard says in the section |
7856 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7857 | structure, union or class type is represented by a structure, | |
7858 | union or class entry that does not have a byte size attribute | |
7859 | and that has a DW_AT_declaration attribute." */ | |
7860 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7861 | { |
15d034d0 | 7862 | xfree (built_actual_name); |
decbce07 MS |
7863 | return; |
7864 | } | |
fa4028e9 | 7865 | |
63d06c5c DC |
7866 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7867 | static vs. global. */ | |
38d518c9 | 7868 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7869 | built_actual_name != NULL, |
176620f1 | 7870 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 7871 | cu->language == language_cplus |
63d06c5c DC |
7872 | ? &objfile->global_psymbols |
7873 | : &objfile->static_psymbols, | |
1762568f | 7874 | 0, cu->language, objfile); |
c906108c | 7875 | |
c906108c SS |
7876 | break; |
7877 | case DW_TAG_enumerator: | |
38d518c9 | 7878 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7879 | built_actual_name != NULL, |
176620f1 | 7880 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 7881 | cu->language == language_cplus |
f6fe98ef DJ |
7882 | ? &objfile->global_psymbols |
7883 | : &objfile->static_psymbols, | |
1762568f | 7884 | 0, cu->language, objfile); |
c906108c SS |
7885 | break; |
7886 | default: | |
7887 | break; | |
7888 | } | |
5c4e30ca | 7889 | |
15d034d0 | 7890 | xfree (built_actual_name); |
c906108c SS |
7891 | } |
7892 | ||
5c4e30ca DC |
7893 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7894 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7895 | the name of the enclosing namespace. */ | |
91c24f0a | 7896 | |
72bf9492 DJ |
7897 | static void |
7898 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7899 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7900 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7901 | { |
72bf9492 | 7902 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7903 | |
72bf9492 | 7904 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7905 | |
7906 | /* Now scan partial symbols in that namespace. */ | |
7907 | ||
91c24f0a | 7908 | if (pdi->has_children) |
cdc07690 | 7909 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7910 | } |
7911 | ||
5d7cb8df JK |
7912 | /* Read a partial die corresponding to a Fortran module. */ |
7913 | ||
7914 | static void | |
7915 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7916 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7917 | { |
530e8392 KB |
7918 | /* Add a symbol for the namespace. */ |
7919 | ||
7920 | add_partial_symbol (pdi, cu); | |
7921 | ||
f55ee35c | 7922 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7923 | |
7924 | if (pdi->has_children) | |
cdc07690 | 7925 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7926 | } |
7927 | ||
bc30ff58 JB |
7928 | /* Read a partial die corresponding to a subprogram and create a partial |
7929 | symbol for that subprogram. When the CU language allows it, this | |
7930 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7931 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7932 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7933 | and highest PC values found in PDI. | |
6e70227d | 7934 | |
cdc07690 YQ |
7935 | PDI may also be a lexical block, in which case we simply search |
7936 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7937 | Again, this is only performed when the CU language allows this |
7938 | type of definitions. */ | |
7939 | ||
7940 | static void | |
7941 | add_partial_subprogram (struct partial_die_info *pdi, | |
7942 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7943 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7944 | { |
7945 | if (pdi->tag == DW_TAG_subprogram) | |
7946 | { | |
7947 | if (pdi->has_pc_info) | |
7948 | { | |
7949 | if (pdi->lowpc < *lowpc) | |
7950 | *lowpc = pdi->lowpc; | |
7951 | if (pdi->highpc > *highpc) | |
7952 | *highpc = pdi->highpc; | |
cdc07690 | 7953 | if (set_addrmap) |
5734ee8b | 7954 | { |
5734ee8b | 7955 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7956 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7957 | CORE_ADDR baseaddr; | |
7958 | CORE_ADDR highpc; | |
7959 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7960 | |
7961 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7962 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7963 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7964 | pdi->lowpc + baseaddr); | |
7965 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7966 | pdi->highpc + baseaddr); | |
7967 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7968 | cu->per_cu->v.psymtab); |
5734ee8b | 7969 | } |
481860b3 GB |
7970 | } |
7971 | ||
7972 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7973 | { | |
bc30ff58 | 7974 | if (!pdi->is_declaration) |
e8d05480 JB |
7975 | /* Ignore subprogram DIEs that do not have a name, they are |
7976 | illegal. Do not emit a complaint at this point, we will | |
7977 | do so when we convert this psymtab into a symtab. */ | |
7978 | if (pdi->name) | |
7979 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7980 | } |
7981 | } | |
6e70227d | 7982 | |
bc30ff58 JB |
7983 | if (! pdi->has_children) |
7984 | return; | |
7985 | ||
7986 | if (cu->language == language_ada) | |
7987 | { | |
7988 | pdi = pdi->die_child; | |
7989 | while (pdi != NULL) | |
7990 | { | |
7991 | fixup_partial_die (pdi, cu); | |
7992 | if (pdi->tag == DW_TAG_subprogram | |
7993 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7994 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7995 | pdi = pdi->die_sibling; |
7996 | } | |
7997 | } | |
7998 | } | |
7999 | ||
91c24f0a DC |
8000 | /* Read a partial die corresponding to an enumeration type. */ |
8001 | ||
72bf9492 DJ |
8002 | static void |
8003 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8004 | struct dwarf2_cu *cu) | |
91c24f0a | 8005 | { |
72bf9492 | 8006 | struct partial_die_info *pdi; |
91c24f0a DC |
8007 | |
8008 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8009 | add_partial_symbol (enum_pdi, cu); |
8010 | ||
8011 | pdi = enum_pdi->die_child; | |
8012 | while (pdi) | |
91c24f0a | 8013 | { |
72bf9492 | 8014 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 8015 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 8016 | else |
72bf9492 DJ |
8017 | add_partial_symbol (pdi, cu); |
8018 | pdi = pdi->die_sibling; | |
91c24f0a | 8019 | } |
91c24f0a DC |
8020 | } |
8021 | ||
6caca83c CC |
8022 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8023 | ||
8024 | static unsigned int | |
d521ce57 | 8025 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8026 | { |
8027 | unsigned int bytes_read; | |
8028 | ||
8029 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8030 | } | |
8031 | ||
4bb7a0a7 DJ |
8032 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
8033 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
8034 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8035 | the initial number. */ | |
8036 | ||
8037 | static struct abbrev_info * | |
d521ce57 | 8038 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 8039 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
8040 | { |
8041 | bfd *abfd = cu->objfile->obfd; | |
8042 | unsigned int abbrev_number; | |
8043 | struct abbrev_info *abbrev; | |
8044 | ||
8045 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
8046 | ||
8047 | if (abbrev_number == 0) | |
8048 | return NULL; | |
8049 | ||
433df2d4 | 8050 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
8051 | if (!abbrev) |
8052 | { | |
422b9917 DE |
8053 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
8054 | " at offset 0x%x [in module %s]"), | |
8055 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 8056 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8057 | } |
8058 | ||
8059 | return abbrev; | |
8060 | } | |
8061 | ||
93311388 DE |
8062 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8063 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8064 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8065 | ||
d521ce57 TT |
8066 | static const gdb_byte * |
8067 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8068 | { |
dee91e82 | 8069 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
8070 | struct abbrev_info *abbrev; |
8071 | unsigned int bytes_read; | |
8072 | ||
8073 | while (1) | |
8074 | { | |
8075 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
8076 | if (abbrev == NULL) | |
8077 | return info_ptr + bytes_read; | |
8078 | else | |
dee91e82 | 8079 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8080 | } |
8081 | } | |
8082 | ||
93311388 DE |
8083 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8084 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8085 | abbrev corresponding to that skipped uleb128 should be passed in |
8086 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8087 | children. */ | |
8088 | ||
d521ce57 TT |
8089 | static const gdb_byte * |
8090 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8091 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8092 | { |
8093 | unsigned int bytes_read; | |
8094 | struct attribute attr; | |
dee91e82 DE |
8095 | bfd *abfd = reader->abfd; |
8096 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8097 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8098 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8099 | unsigned int form, i; |
8100 | ||
8101 | for (i = 0; i < abbrev->num_attrs; i++) | |
8102 | { | |
8103 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8104 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8105 | { | |
dee91e82 | 8106 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 8107 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
8108 | complaint (&symfile_complaints, |
8109 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 8110 | else |
b9502d3f | 8111 | { |
9c541725 PA |
8112 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8113 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8114 | |
8115 | if (sibling_ptr < info_ptr) | |
8116 | complaint (&symfile_complaints, | |
8117 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
8118 | else if (sibling_ptr > reader->buffer_end) |
8119 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
8120 | else |
8121 | return sibling_ptr; | |
8122 | } | |
4bb7a0a7 DJ |
8123 | } |
8124 | ||
8125 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8126 | form = abbrev->attrs[i].form; | |
8127 | skip_attribute: | |
8128 | switch (form) | |
8129 | { | |
4bb7a0a7 | 8130 | case DW_FORM_ref_addr: |
ae411497 TT |
8131 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8132 | and later it is offset sized. */ | |
8133 | if (cu->header.version == 2) | |
8134 | info_ptr += cu->header.addr_size; | |
8135 | else | |
8136 | info_ptr += cu->header.offset_size; | |
8137 | break; | |
36586728 TT |
8138 | case DW_FORM_GNU_ref_alt: |
8139 | info_ptr += cu->header.offset_size; | |
8140 | break; | |
ae411497 | 8141 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8142 | info_ptr += cu->header.addr_size; |
8143 | break; | |
8144 | case DW_FORM_data1: | |
8145 | case DW_FORM_ref1: | |
8146 | case DW_FORM_flag: | |
8147 | info_ptr += 1; | |
8148 | break; | |
2dc7f7b3 | 8149 | case DW_FORM_flag_present: |
43988095 | 8150 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8151 | break; |
4bb7a0a7 DJ |
8152 | case DW_FORM_data2: |
8153 | case DW_FORM_ref2: | |
8154 | info_ptr += 2; | |
8155 | break; | |
8156 | case DW_FORM_data4: | |
8157 | case DW_FORM_ref4: | |
8158 | info_ptr += 4; | |
8159 | break; | |
8160 | case DW_FORM_data8: | |
8161 | case DW_FORM_ref8: | |
55f1336d | 8162 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8163 | info_ptr += 8; |
8164 | break; | |
0224619f JK |
8165 | case DW_FORM_data16: |
8166 | info_ptr += 16; | |
8167 | break; | |
4bb7a0a7 | 8168 | case DW_FORM_string: |
9b1c24c8 | 8169 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8170 | info_ptr += bytes_read; |
8171 | break; | |
2dc7f7b3 | 8172 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8173 | case DW_FORM_strp: |
36586728 | 8174 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8175 | info_ptr += cu->header.offset_size; |
8176 | break; | |
2dc7f7b3 | 8177 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8178 | case DW_FORM_block: |
8179 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8180 | info_ptr += bytes_read; | |
8181 | break; | |
8182 | case DW_FORM_block1: | |
8183 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8184 | break; | |
8185 | case DW_FORM_block2: | |
8186 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8187 | break; | |
8188 | case DW_FORM_block4: | |
8189 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8190 | break; | |
8191 | case DW_FORM_sdata: | |
8192 | case DW_FORM_udata: | |
8193 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8194 | case DW_FORM_GNU_addr_index: |
8195 | case DW_FORM_GNU_str_index: | |
d521ce57 | 8196 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8197 | break; |
8198 | case DW_FORM_indirect: | |
8199 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8200 | info_ptr += bytes_read; | |
8201 | /* We need to continue parsing from here, so just go back to | |
8202 | the top. */ | |
8203 | goto skip_attribute; | |
8204 | ||
8205 | default: | |
3e43a32a MS |
8206 | error (_("Dwarf Error: Cannot handle %s " |
8207 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8208 | dwarf_form_name (form), |
8209 | bfd_get_filename (abfd)); | |
8210 | } | |
8211 | } | |
8212 | ||
8213 | if (abbrev->has_children) | |
dee91e82 | 8214 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8215 | else |
8216 | return info_ptr; | |
8217 | } | |
8218 | ||
93311388 | 8219 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8220 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8221 | |
d521ce57 | 8222 | static const gdb_byte * |
dee91e82 DE |
8223 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8224 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8225 | const gdb_byte *info_ptr) |
91c24f0a DC |
8226 | { |
8227 | /* Do we know the sibling already? */ | |
72bf9492 | 8228 | |
91c24f0a DC |
8229 | if (orig_pdi->sibling) |
8230 | return orig_pdi->sibling; | |
8231 | ||
8232 | /* Are there any children to deal with? */ | |
8233 | ||
8234 | if (!orig_pdi->has_children) | |
8235 | return info_ptr; | |
8236 | ||
4bb7a0a7 | 8237 | /* Skip the children the long way. */ |
91c24f0a | 8238 | |
dee91e82 | 8239 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8240 | } |
8241 | ||
257e7a09 | 8242 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8243 | not NULL. */ |
c906108c SS |
8244 | |
8245 | static void | |
257e7a09 YQ |
8246 | dwarf2_read_symtab (struct partial_symtab *self, |
8247 | struct objfile *objfile) | |
c906108c | 8248 | { |
257e7a09 | 8249 | if (self->readin) |
c906108c | 8250 | { |
442e4d9c | 8251 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 8252 | self->filename); |
442e4d9c YQ |
8253 | } |
8254 | else | |
8255 | { | |
8256 | if (info_verbose) | |
c906108c | 8257 | { |
442e4d9c | 8258 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 8259 | self->filename); |
442e4d9c | 8260 | gdb_flush (gdb_stdout); |
c906108c | 8261 | } |
c906108c | 8262 | |
442e4d9c | 8263 | /* Restore our global data. */ |
9a3c8263 SM |
8264 | dwarf2_per_objfile |
8265 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
8266 | dwarf2_objfile_data_key); | |
10b3939b | 8267 | |
442e4d9c YQ |
8268 | /* If this psymtab is constructed from a debug-only objfile, the |
8269 | has_section_at_zero flag will not necessarily be correct. We | |
8270 | can get the correct value for this flag by looking at the data | |
8271 | associated with the (presumably stripped) associated objfile. */ | |
8272 | if (objfile->separate_debug_objfile_backlink) | |
8273 | { | |
8274 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
8275 | = ((struct dwarf2_per_objfile *) |
8276 | objfile_data (objfile->separate_debug_objfile_backlink, | |
8277 | dwarf2_objfile_data_key)); | |
9a619af0 | 8278 | |
442e4d9c YQ |
8279 | dwarf2_per_objfile->has_section_at_zero |
8280 | = dpo_backlink->has_section_at_zero; | |
8281 | } | |
b2ab525c | 8282 | |
442e4d9c | 8283 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 8284 | |
257e7a09 | 8285 | psymtab_to_symtab_1 (self); |
c906108c | 8286 | |
442e4d9c YQ |
8287 | /* Finish up the debug error message. */ |
8288 | if (info_verbose) | |
8289 | printf_filtered (_("done.\n")); | |
c906108c | 8290 | } |
95554aad TT |
8291 | |
8292 | process_cu_includes (); | |
c906108c | 8293 | } |
9cdd5dbd DE |
8294 | \f |
8295 | /* Reading in full CUs. */ | |
c906108c | 8296 | |
10b3939b DJ |
8297 | /* Add PER_CU to the queue. */ |
8298 | ||
8299 | static void | |
95554aad TT |
8300 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8301 | enum language pretend_language) | |
10b3939b DJ |
8302 | { |
8303 | struct dwarf2_queue_item *item; | |
8304 | ||
8305 | per_cu->queued = 1; | |
8d749320 | 8306 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 8307 | item->per_cu = per_cu; |
95554aad | 8308 | item->pretend_language = pretend_language; |
10b3939b DJ |
8309 | item->next = NULL; |
8310 | ||
8311 | if (dwarf2_queue == NULL) | |
8312 | dwarf2_queue = item; | |
8313 | else | |
8314 | dwarf2_queue_tail->next = item; | |
8315 | ||
8316 | dwarf2_queue_tail = item; | |
8317 | } | |
8318 | ||
89e63ee4 DE |
8319 | /* If PER_CU is not yet queued, add it to the queue. |
8320 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8321 | dependency. | |
0907af0c | 8322 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8323 | meaning either PER_CU is already queued or it is already loaded. |
8324 | ||
8325 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8326 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8327 | |
8328 | static int | |
89e63ee4 | 8329 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8330 | struct dwarf2_per_cu_data *per_cu, |
8331 | enum language pretend_language) | |
8332 | { | |
8333 | /* We may arrive here during partial symbol reading, if we need full | |
8334 | DIEs to process an unusual case (e.g. template arguments). Do | |
8335 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
8336 | if (dwarf2_per_objfile->reading_partial_symbols) | |
8337 | { | |
8338 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8339 | return 1; | |
8340 | return 0; | |
8341 | } | |
8342 | ||
8343 | /* Mark the dependence relation so that we don't flush PER_CU | |
8344 | too early. */ | |
89e63ee4 DE |
8345 | if (dependent_cu != NULL) |
8346 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8347 | |
8348 | /* If it's already on the queue, we have nothing to do. */ | |
8349 | if (per_cu->queued) | |
8350 | return 0; | |
8351 | ||
8352 | /* If the compilation unit is already loaded, just mark it as | |
8353 | used. */ | |
8354 | if (per_cu->cu != NULL) | |
8355 | { | |
8356 | per_cu->cu->last_used = 0; | |
8357 | return 0; | |
8358 | } | |
8359 | ||
8360 | /* Add it to the queue. */ | |
8361 | queue_comp_unit (per_cu, pretend_language); | |
8362 | ||
8363 | return 1; | |
8364 | } | |
8365 | ||
10b3939b DJ |
8366 | /* Process the queue. */ |
8367 | ||
8368 | static void | |
a0f42c21 | 8369 | process_queue (void) |
10b3939b DJ |
8370 | { |
8371 | struct dwarf2_queue_item *item, *next_item; | |
8372 | ||
b4f54984 | 8373 | if (dwarf_read_debug) |
45cfd468 DE |
8374 | { |
8375 | fprintf_unfiltered (gdb_stdlog, | |
8376 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8377 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8378 | } |
8379 | ||
03dd20cc DJ |
8380 | /* The queue starts out with one item, but following a DIE reference |
8381 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
8382 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
8383 | { | |
cc12ce38 DE |
8384 | if ((dwarf2_per_objfile->using_index |
8385 | ? !item->per_cu->v.quick->compunit_symtab | |
8386 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
8387 | /* Skip dummy CUs. */ | |
8388 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
8389 | { |
8390 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 8391 | unsigned int debug_print_threshold; |
247f5c4f | 8392 | char buf[100]; |
f4dc4d17 | 8393 | |
247f5c4f | 8394 | if (per_cu->is_debug_types) |
f4dc4d17 | 8395 | { |
247f5c4f DE |
8396 | struct signatured_type *sig_type = |
8397 | (struct signatured_type *) per_cu; | |
8398 | ||
8399 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 8400 | hex_string (sig_type->signature), |
9c541725 | 8401 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
8402 | /* There can be 100s of TUs. |
8403 | Only print them in verbose mode. */ | |
8404 | debug_print_threshold = 2; | |
f4dc4d17 | 8405 | } |
247f5c4f | 8406 | else |
73be47f5 | 8407 | { |
9c541725 PA |
8408 | sprintf (buf, "CU at offset 0x%x", |
8409 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
8410 | debug_print_threshold = 1; |
8411 | } | |
247f5c4f | 8412 | |
b4f54984 | 8413 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8414 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8415 | |
8416 | if (per_cu->is_debug_types) | |
8417 | process_full_type_unit (per_cu, item->pretend_language); | |
8418 | else | |
8419 | process_full_comp_unit (per_cu, item->pretend_language); | |
8420 | ||
b4f54984 | 8421 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8422 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8423 | } |
10b3939b DJ |
8424 | |
8425 | item->per_cu->queued = 0; | |
8426 | next_item = item->next; | |
8427 | xfree (item); | |
8428 | } | |
8429 | ||
8430 | dwarf2_queue_tail = NULL; | |
45cfd468 | 8431 | |
b4f54984 | 8432 | if (dwarf_read_debug) |
45cfd468 DE |
8433 | { |
8434 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8435 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8436 | } |
10b3939b DJ |
8437 | } |
8438 | ||
8439 | /* Free all allocated queue entries. This function only releases anything if | |
8440 | an error was thrown; if the queue was processed then it would have been | |
8441 | freed as we went along. */ | |
8442 | ||
8443 | static void | |
8444 | dwarf2_release_queue (void *dummy) | |
8445 | { | |
8446 | struct dwarf2_queue_item *item, *last; | |
8447 | ||
8448 | item = dwarf2_queue; | |
8449 | while (item) | |
8450 | { | |
8451 | /* Anything still marked queued is likely to be in an | |
8452 | inconsistent state, so discard it. */ | |
8453 | if (item->per_cu->queued) | |
8454 | { | |
8455 | if (item->per_cu->cu != NULL) | |
dee91e82 | 8456 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
8457 | item->per_cu->queued = 0; |
8458 | } | |
8459 | ||
8460 | last = item; | |
8461 | item = item->next; | |
8462 | xfree (last); | |
8463 | } | |
8464 | ||
8465 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
8466 | } | |
8467 | ||
8468 | /* Read in full symbols for PST, and anything it depends on. */ | |
8469 | ||
c906108c | 8470 | static void |
fba45db2 | 8471 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 8472 | { |
10b3939b | 8473 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
8474 | int i; |
8475 | ||
95554aad TT |
8476 | if (pst->readin) |
8477 | return; | |
8478 | ||
aaa75496 | 8479 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
8480 | if (!pst->dependencies[i]->readin |
8481 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
8482 | { |
8483 | /* Inform about additional files that need to be read in. */ | |
8484 | if (info_verbose) | |
8485 | { | |
a3f17187 | 8486 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
8487 | fputs_filtered (" ", gdb_stdout); |
8488 | wrap_here (""); | |
8489 | fputs_filtered ("and ", gdb_stdout); | |
8490 | wrap_here (""); | |
8491 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 8492 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
8493 | gdb_flush (gdb_stdout); |
8494 | } | |
8495 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
8496 | } | |
8497 | ||
9a3c8263 | 8498 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
8499 | |
8500 | if (per_cu == NULL) | |
aaa75496 JB |
8501 | { |
8502 | /* It's an include file, no symbols to read for it. | |
8503 | Everything is in the parent symtab. */ | |
8504 | pst->readin = 1; | |
8505 | return; | |
8506 | } | |
c906108c | 8507 | |
a0f42c21 | 8508 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
8509 | } |
8510 | ||
dee91e82 DE |
8511 | /* Trivial hash function for die_info: the hash value of a DIE |
8512 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8513 | |
dee91e82 DE |
8514 | static hashval_t |
8515 | die_hash (const void *item) | |
10b3939b | 8516 | { |
9a3c8263 | 8517 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8518 | |
9c541725 | 8519 | return to_underlying (die->sect_off); |
dee91e82 | 8520 | } |
63d06c5c | 8521 | |
dee91e82 DE |
8522 | /* Trivial comparison function for die_info structures: two DIEs |
8523 | are equal if they have the same offset. */ | |
98bfdba5 | 8524 | |
dee91e82 DE |
8525 | static int |
8526 | die_eq (const void *item_lhs, const void *item_rhs) | |
8527 | { | |
9a3c8263 SM |
8528 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8529 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8530 | |
9c541725 | 8531 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8532 | } |
c906108c | 8533 | |
dee91e82 DE |
8534 | /* die_reader_func for load_full_comp_unit. |
8535 | This is identical to read_signatured_type_reader, | |
8536 | but is kept separate for now. */ | |
c906108c | 8537 | |
dee91e82 DE |
8538 | static void |
8539 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8540 | const gdb_byte *info_ptr, |
dee91e82 DE |
8541 | struct die_info *comp_unit_die, |
8542 | int has_children, | |
8543 | void *data) | |
8544 | { | |
8545 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 8546 | enum language *language_ptr = (enum language *) data; |
6caca83c | 8547 | |
dee91e82 DE |
8548 | gdb_assert (cu->die_hash == NULL); |
8549 | cu->die_hash = | |
8550 | htab_create_alloc_ex (cu->header.length / 12, | |
8551 | die_hash, | |
8552 | die_eq, | |
8553 | NULL, | |
8554 | &cu->comp_unit_obstack, | |
8555 | hashtab_obstack_allocate, | |
8556 | dummy_obstack_deallocate); | |
e142c38c | 8557 | |
dee91e82 DE |
8558 | if (has_children) |
8559 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
8560 | &info_ptr, comp_unit_die); | |
8561 | cu->dies = comp_unit_die; | |
8562 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
8563 | |
8564 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8565 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8566 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8567 | or we won't be able to build types correctly. |
8568 | Similarly, if we do not read the producer, we can not apply | |
8569 | producer-specific interpretation. */ | |
95554aad | 8570 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 8571 | } |
10b3939b | 8572 | |
dee91e82 | 8573 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 8574 | |
dee91e82 | 8575 | static void |
95554aad TT |
8576 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8577 | enum language pretend_language) | |
dee91e82 | 8578 | { |
3019eac3 | 8579 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 8580 | |
f4dc4d17 DE |
8581 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8582 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
8583 | } |
8584 | ||
3da10d80 KS |
8585 | /* Add a DIE to the delayed physname list. */ |
8586 | ||
8587 | static void | |
8588 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8589 | const char *name, struct die_info *die, | |
8590 | struct dwarf2_cu *cu) | |
8591 | { | |
8592 | struct delayed_method_info mi; | |
8593 | mi.type = type; | |
8594 | mi.fnfield_index = fnfield_index; | |
8595 | mi.index = index; | |
8596 | mi.name = name; | |
8597 | mi.die = die; | |
8598 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8599 | } | |
8600 | ||
8601 | /* A cleanup for freeing the delayed method list. */ | |
8602 | ||
8603 | static void | |
8604 | free_delayed_list (void *ptr) | |
8605 | { | |
8606 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8607 | if (cu->method_list != NULL) | |
8608 | { | |
8609 | VEC_free (delayed_method_info, cu->method_list); | |
8610 | cu->method_list = NULL; | |
8611 | } | |
8612 | } | |
8613 | ||
3693fdb3 PA |
8614 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8615 | "const" / "volatile". If so, decrements LEN by the length of the | |
8616 | modifier and return true. Otherwise return false. */ | |
8617 | ||
8618 | template<size_t N> | |
8619 | static bool | |
8620 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8621 | { | |
8622 | size_t mod_len = sizeof (mod) - 1; | |
8623 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8624 | { | |
8625 | len -= mod_len; | |
8626 | return true; | |
8627 | } | |
8628 | return false; | |
8629 | } | |
8630 | ||
3da10d80 KS |
8631 | /* Compute the physnames of any methods on the CU's method list. |
8632 | ||
8633 | The computation of method physnames is delayed in order to avoid the | |
8634 | (bad) condition that one of the method's formal parameters is of an as yet | |
8635 | incomplete type. */ | |
8636 | ||
8637 | static void | |
8638 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8639 | { | |
8640 | int i; | |
8641 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8642 | |
8643 | /* Only C++ delays computing physnames. */ | |
8644 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8645 | return; | |
8646 | gdb_assert (cu->language == language_cplus); | |
8647 | ||
3da10d80 KS |
8648 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8649 | { | |
1d06ead6 | 8650 | const char *physname; |
3da10d80 KS |
8651 | struct fn_fieldlist *fn_flp |
8652 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8653 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8654 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8655 | = physname ? physname : ""; | |
3693fdb3 PA |
8656 | |
8657 | /* Since there's no tag to indicate whether a method is a | |
8658 | const/volatile overload, extract that information out of the | |
8659 | demangled name. */ | |
8660 | if (physname != NULL) | |
8661 | { | |
8662 | size_t len = strlen (physname); | |
8663 | ||
8664 | while (1) | |
8665 | { | |
8666 | if (physname[len] == ')') /* shortcut */ | |
8667 | break; | |
8668 | else if (check_modifier (physname, len, " const")) | |
8669 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8670 | else if (check_modifier (physname, len, " volatile")) | |
8671 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8672 | else | |
8673 | break; | |
8674 | } | |
8675 | } | |
3da10d80 KS |
8676 | } |
8677 | } | |
8678 | ||
a766d390 DE |
8679 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8680 | and it's not clear if/how imported objects will appear. | |
8681 | To keep Go support simple until that's worked out, | |
8682 | go back through what we've read and create something usable. | |
8683 | We could do this while processing each DIE, and feels kinda cleaner, | |
8684 | but that way is more invasive. | |
8685 | This is to, for example, allow the user to type "p var" or "b main" | |
8686 | without having to specify the package name, and allow lookups | |
8687 | of module.object to work in contexts that use the expression | |
8688 | parser. */ | |
8689 | ||
8690 | static void | |
8691 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8692 | { | |
8693 | char *package_name = NULL; | |
8694 | struct pending *list; | |
8695 | int i; | |
8696 | ||
8697 | for (list = global_symbols; list != NULL; list = list->next) | |
8698 | { | |
8699 | for (i = 0; i < list->nsyms; ++i) | |
8700 | { | |
8701 | struct symbol *sym = list->symbol[i]; | |
8702 | ||
8703 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8704 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8705 | { | |
8706 | char *this_package_name = go_symbol_package_name (sym); | |
8707 | ||
8708 | if (this_package_name == NULL) | |
8709 | continue; | |
8710 | if (package_name == NULL) | |
8711 | package_name = this_package_name; | |
8712 | else | |
8713 | { | |
8714 | if (strcmp (package_name, this_package_name) != 0) | |
8715 | complaint (&symfile_complaints, | |
8716 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8717 | (symbol_symtab (sym) != NULL |
8718 | ? symtab_to_filename_for_display | |
8719 | (symbol_symtab (sym)) | |
4262abfb | 8720 | : objfile_name (cu->objfile)), |
a766d390 DE |
8721 | this_package_name, package_name); |
8722 | xfree (this_package_name); | |
8723 | } | |
8724 | } | |
8725 | } | |
8726 | } | |
8727 | ||
8728 | if (package_name != NULL) | |
8729 | { | |
8730 | struct objfile *objfile = cu->objfile; | |
34a68019 | 8731 | const char *saved_package_name |
224c3ddb SM |
8732 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
8733 | package_name, | |
8734 | strlen (package_name)); | |
19f392bc UW |
8735 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8736 | saved_package_name); | |
a766d390 DE |
8737 | struct symbol *sym; |
8738 | ||
8739 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
8740 | ||
e623cf5d | 8741 | sym = allocate_symbol (objfile); |
f85f34ed | 8742 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
8743 | SYMBOL_SET_NAMES (sym, saved_package_name, |
8744 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
8745 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8746 | e.g., "main" finds the "main" module and not C's main(). */ | |
8747 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8748 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8749 | SYMBOL_TYPE (sym) = type; |
8750 | ||
8751 | add_symbol_to_list (sym, &global_symbols); | |
8752 | ||
8753 | xfree (package_name); | |
8754 | } | |
8755 | } | |
8756 | ||
95554aad TT |
8757 | /* Return the symtab for PER_CU. This works properly regardless of |
8758 | whether we're using the index or psymtabs. */ | |
8759 | ||
43f3e411 DE |
8760 | static struct compunit_symtab * |
8761 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
8762 | { |
8763 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
8764 | ? per_cu->v.quick->compunit_symtab |
8765 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
8766 | } |
8767 | ||
8768 | /* A helper function for computing the list of all symbol tables | |
8769 | included by PER_CU. */ | |
8770 | ||
8771 | static void | |
43f3e411 | 8772 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 8773 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 8774 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 8775 | struct compunit_symtab *immediate_parent) |
95554aad TT |
8776 | { |
8777 | void **slot; | |
8778 | int ix; | |
43f3e411 | 8779 | struct compunit_symtab *cust; |
95554aad TT |
8780 | struct dwarf2_per_cu_data *iter; |
8781 | ||
8782 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
8783 | if (*slot != NULL) | |
8784 | { | |
8785 | /* This inclusion and its children have been processed. */ | |
8786 | return; | |
8787 | } | |
8788 | ||
8789 | *slot = per_cu; | |
8790 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
8791 | cust = get_compunit_symtab (per_cu); |
8792 | if (cust != NULL) | |
ec94af83 DE |
8793 | { |
8794 | /* If this is a type unit only add its symbol table if we haven't | |
8795 | seen it yet (type unit per_cu's can share symtabs). */ | |
8796 | if (per_cu->is_debug_types) | |
8797 | { | |
43f3e411 | 8798 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
8799 | if (*slot == NULL) |
8800 | { | |
43f3e411 DE |
8801 | *slot = cust; |
8802 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
8803 | if (cust->user == NULL) | |
8804 | cust->user = immediate_parent; | |
ec94af83 DE |
8805 | } |
8806 | } | |
8807 | else | |
f9125b6c | 8808 | { |
43f3e411 DE |
8809 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
8810 | if (cust->user == NULL) | |
8811 | cust->user = immediate_parent; | |
f9125b6c | 8812 | } |
ec94af83 | 8813 | } |
95554aad TT |
8814 | |
8815 | for (ix = 0; | |
796a7ff8 | 8816 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 8817 | ++ix) |
ec94af83 DE |
8818 | { |
8819 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 8820 | all_type_symtabs, iter, cust); |
ec94af83 | 8821 | } |
95554aad TT |
8822 | } |
8823 | ||
43f3e411 | 8824 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
8825 | PER_CU. */ |
8826 | ||
8827 | static void | |
43f3e411 | 8828 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 8829 | { |
f4dc4d17 DE |
8830 | gdb_assert (! per_cu->is_debug_types); |
8831 | ||
796a7ff8 | 8832 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
8833 | { |
8834 | int ix, len; | |
ec94af83 | 8835 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
8836 | struct compunit_symtab *compunit_symtab_iter; |
8837 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 8838 | htab_t all_children, all_type_symtabs; |
43f3e411 | 8839 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
8840 | |
8841 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 8842 | if (cust == NULL) |
95554aad TT |
8843 | return; |
8844 | ||
8845 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
8846 | NULL, xcalloc, xfree); | |
ec94af83 DE |
8847 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
8848 | NULL, xcalloc, xfree); | |
95554aad TT |
8849 | |
8850 | for (ix = 0; | |
796a7ff8 | 8851 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 8852 | ix, per_cu_iter); |
95554aad | 8853 | ++ix) |
ec94af83 DE |
8854 | { |
8855 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 8856 | all_type_symtabs, per_cu_iter, |
43f3e411 | 8857 | cust); |
ec94af83 | 8858 | } |
95554aad | 8859 | |
ec94af83 | 8860 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
8861 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
8862 | cust->includes | |
8d749320 SM |
8863 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
8864 | struct compunit_symtab *, len + 1); | |
95554aad | 8865 | for (ix = 0; |
43f3e411 DE |
8866 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
8867 | compunit_symtab_iter); | |
95554aad | 8868 | ++ix) |
43f3e411 DE |
8869 | cust->includes[ix] = compunit_symtab_iter; |
8870 | cust->includes[len] = NULL; | |
95554aad | 8871 | |
43f3e411 | 8872 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 8873 | htab_delete (all_children); |
ec94af83 | 8874 | htab_delete (all_type_symtabs); |
95554aad TT |
8875 | } |
8876 | } | |
8877 | ||
8878 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
8879 | read. */ | |
8880 | ||
8881 | static void | |
8882 | process_cu_includes (void) | |
8883 | { | |
8884 | int ix; | |
8885 | struct dwarf2_per_cu_data *iter; | |
8886 | ||
8887 | for (ix = 0; | |
8888 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8889 | ix, iter); | |
8890 | ++ix) | |
f4dc4d17 DE |
8891 | { |
8892 | if (! iter->is_debug_types) | |
43f3e411 | 8893 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8894 | } |
95554aad TT |
8895 | |
8896 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8897 | } | |
8898 | ||
9cdd5dbd | 8899 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8900 | already been loaded into memory. */ |
8901 | ||
8902 | static void | |
95554aad TT |
8903 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8904 | enum language pretend_language) | |
10b3939b | 8905 | { |
10b3939b | 8906 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8907 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8908 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8909 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8910 | struct compunit_symtab *cust; |
33c7c59d | 8911 | struct cleanup *delayed_list_cleanup; |
10b3939b | 8912 | CORE_ADDR baseaddr; |
4359dff1 | 8913 | struct block *static_block; |
3e29f34a | 8914 | CORE_ADDR addr; |
10b3939b DJ |
8915 | |
8916 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8917 | ||
10b3939b | 8918 | buildsym_init (); |
33c7c59d | 8919 | scoped_free_pendings free_pending; |
3da10d80 | 8920 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8921 | |
8922 | cu->list_in_scope = &file_symbols; | |
c906108c | 8923 | |
95554aad TT |
8924 | cu->language = pretend_language; |
8925 | cu->language_defn = language_def (cu->language); | |
8926 | ||
c906108c | 8927 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8928 | process_die (cu->dies, cu); |
c906108c | 8929 | |
a766d390 DE |
8930 | /* For now fudge the Go package. */ |
8931 | if (cu->language == language_go) | |
8932 | fixup_go_packaging (cu); | |
8933 | ||
3da10d80 KS |
8934 | /* Now that we have processed all the DIEs in the CU, all the types |
8935 | should be complete, and it should now be safe to compute all of the | |
8936 | physnames. */ | |
8937 | compute_delayed_physnames (cu); | |
8938 | do_cleanups (delayed_list_cleanup); | |
8939 | ||
fae299cd DC |
8940 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8941 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8942 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8943 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8944 | |
3e29f34a MR |
8945 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8946 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8947 | |
8948 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8949 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8950 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8951 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8952 | this comp unit. */ | |
8953 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8954 | ||
43f3e411 DE |
8955 | cust = end_symtab_from_static_block (static_block, |
8956 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8957 | |
43f3e411 | 8958 | if (cust != NULL) |
c906108c | 8959 | { |
df15bd07 | 8960 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8961 | |
8be455d7 JK |
8962 | /* Set symtab language to language from DW_AT_language. If the |
8963 | compilation is from a C file generated by language preprocessors, do | |
8964 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8965 | if (!(cu->language == language_c |
40e3ad0e | 8966 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8967 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8968 | |
8969 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8970 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8971 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8972 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8973 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8974 | |
8975 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8976 | needed, it would be wrong due to missing DW_AT_producer there. | |
8977 | ||
8978 | Still one can confuse GDB by using non-standard GCC compilation | |
8979 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8980 | */ | |
ab260dad | 8981 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8982 | cust->locations_valid = 1; |
e0d00bc7 JK |
8983 | |
8984 | if (gcc_4_minor >= 5) | |
43f3e411 | 8985 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8986 | |
43f3e411 | 8987 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8988 | } |
9291a0cd TT |
8989 | |
8990 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8991 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8992 | else |
8993 | { | |
8994 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8995 | pst->compunit_symtab = cust; |
9291a0cd TT |
8996 | pst->readin = 1; |
8997 | } | |
c906108c | 8998 | |
95554aad TT |
8999 | /* Push it for inclusion processing later. */ |
9000 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
f4dc4d17 | 9001 | } |
45cfd468 | 9002 | |
f4dc4d17 DE |
9003 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9004 | already been loaded into memory. */ | |
9005 | ||
9006 | static void | |
9007 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9008 | enum language pretend_language) | |
9009 | { | |
9010 | struct dwarf2_cu *cu = per_cu->cu; | |
9011 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 9012 | struct compunit_symtab *cust; |
33c7c59d | 9013 | struct cleanup *delayed_list_cleanup; |
0186c6a7 DE |
9014 | struct signatured_type *sig_type; |
9015 | ||
9016 | gdb_assert (per_cu->is_debug_types); | |
9017 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
9018 | |
9019 | buildsym_init (); | |
33c7c59d | 9020 | scoped_free_pendings free_pending; |
f4dc4d17 DE |
9021 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
9022 | ||
9023 | cu->list_in_scope = &file_symbols; | |
9024 | ||
9025 | cu->language = pretend_language; | |
9026 | cu->language_defn = language_def (cu->language); | |
9027 | ||
9028 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9029 | process_die (cu->dies, cu); | |
9030 | ||
9031 | /* For now fudge the Go package. */ | |
9032 | if (cu->language == language_go) | |
9033 | fixup_go_packaging (cu); | |
9034 | ||
9035 | /* Now that we have processed all the DIEs in the CU, all the types | |
9036 | should be complete, and it should now be safe to compute all of the | |
9037 | physnames. */ | |
9038 | compute_delayed_physnames (cu); | |
9039 | do_cleanups (delayed_list_cleanup); | |
9040 | ||
9041 | /* TUs share symbol tables. | |
9042 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9043 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9044 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9045 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9046 | { |
43f3e411 DE |
9047 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
9048 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 9049 | |
43f3e411 | 9050 | if (cust != NULL) |
f4dc4d17 DE |
9051 | { |
9052 | /* Set symtab language to language from DW_AT_language. If the | |
9053 | compilation is from a C file generated by language preprocessors, | |
9054 | do not set the language if it was already deduced by | |
9055 | start_subfile. */ | |
43f3e411 DE |
9056 | if (!(cu->language == language_c |
9057 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9058 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9059 | } |
9060 | } | |
9061 | else | |
9062 | { | |
0ab9ce85 | 9063 | augment_type_symtab (); |
43f3e411 | 9064 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9065 | } |
9066 | ||
9067 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9068 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9069 | else |
9070 | { | |
9071 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 9072 | pst->compunit_symtab = cust; |
f4dc4d17 | 9073 | pst->readin = 1; |
45cfd468 | 9074 | } |
c906108c SS |
9075 | } |
9076 | ||
95554aad TT |
9077 | /* Process an imported unit DIE. */ |
9078 | ||
9079 | static void | |
9080 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9081 | { | |
9082 | struct attribute *attr; | |
9083 | ||
f4dc4d17 DE |
9084 | /* For now we don't handle imported units in type units. */ |
9085 | if (cu->per_cu->is_debug_types) | |
9086 | { | |
9087 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9088 | " supported in type units [in module %s]"), | |
4262abfb | 9089 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
9090 | } |
9091 | ||
95554aad TT |
9092 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9093 | if (attr != NULL) | |
9094 | { | |
9c541725 PA |
9095 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9096 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9097 | dwarf2_per_cu_data *per_cu | |
9098 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 9099 | |
69d751e3 | 9100 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
9101 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
9102 | load_full_comp_unit (per_cu, cu->language); | |
9103 | ||
796a7ff8 | 9104 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
9105 | per_cu); |
9106 | } | |
9107 | } | |
9108 | ||
4c8aa72d PA |
9109 | /* RAII object that represents a process_die scope: i.e., |
9110 | starts/finishes processing a DIE. */ | |
9111 | class process_die_scope | |
adde2bff | 9112 | { |
4c8aa72d PA |
9113 | public: |
9114 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9115 | : m_die (die), m_cu (cu) | |
9116 | { | |
9117 | /* We should only be processing DIEs not already in process. */ | |
9118 | gdb_assert (!m_die->in_process); | |
9119 | m_die->in_process = true; | |
9120 | } | |
8c3cb9fa | 9121 | |
4c8aa72d PA |
9122 | ~process_die_scope () |
9123 | { | |
9124 | m_die->in_process = false; | |
9125 | ||
9126 | /* If we're done processing the DIE for the CU that owns the line | |
9127 | header, we don't need the line header anymore. */ | |
9128 | if (m_cu->line_header_die_owner == m_die) | |
9129 | { | |
9130 | delete m_cu->line_header; | |
9131 | m_cu->line_header = NULL; | |
9132 | m_cu->line_header_die_owner = NULL; | |
9133 | } | |
9134 | } | |
9135 | ||
9136 | private: | |
9137 | die_info *m_die; | |
9138 | dwarf2_cu *m_cu; | |
9139 | }; | |
adde2bff | 9140 | |
c906108c SS |
9141 | /* Process a die and its children. */ |
9142 | ||
9143 | static void | |
e7c27a73 | 9144 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9145 | { |
4c8aa72d | 9146 | process_die_scope scope (die, cu); |
adde2bff | 9147 | |
c906108c SS |
9148 | switch (die->tag) |
9149 | { | |
9150 | case DW_TAG_padding: | |
9151 | break; | |
9152 | case DW_TAG_compile_unit: | |
95554aad | 9153 | case DW_TAG_partial_unit: |
e7c27a73 | 9154 | read_file_scope (die, cu); |
c906108c | 9155 | break; |
348e048f DE |
9156 | case DW_TAG_type_unit: |
9157 | read_type_unit_scope (die, cu); | |
9158 | break; | |
c906108c | 9159 | case DW_TAG_subprogram: |
c906108c | 9160 | case DW_TAG_inlined_subroutine: |
edb3359d | 9161 | read_func_scope (die, cu); |
c906108c SS |
9162 | break; |
9163 | case DW_TAG_lexical_block: | |
14898363 L |
9164 | case DW_TAG_try_block: |
9165 | case DW_TAG_catch_block: | |
e7c27a73 | 9166 | read_lexical_block_scope (die, cu); |
c906108c | 9167 | break; |
216f72a1 | 9168 | case DW_TAG_call_site: |
96408a79 SA |
9169 | case DW_TAG_GNU_call_site: |
9170 | read_call_site_scope (die, cu); | |
9171 | break; | |
c906108c | 9172 | case DW_TAG_class_type: |
680b30c7 | 9173 | case DW_TAG_interface_type: |
c906108c SS |
9174 | case DW_TAG_structure_type: |
9175 | case DW_TAG_union_type: | |
134d01f1 | 9176 | process_structure_scope (die, cu); |
c906108c SS |
9177 | break; |
9178 | case DW_TAG_enumeration_type: | |
134d01f1 | 9179 | process_enumeration_scope (die, cu); |
c906108c | 9180 | break; |
134d01f1 | 9181 | |
f792889a DJ |
9182 | /* These dies have a type, but processing them does not create |
9183 | a symbol or recurse to process the children. Therefore we can | |
9184 | read them on-demand through read_type_die. */ | |
c906108c | 9185 | case DW_TAG_subroutine_type: |
72019c9c | 9186 | case DW_TAG_set_type: |
c906108c | 9187 | case DW_TAG_array_type: |
c906108c | 9188 | case DW_TAG_pointer_type: |
c906108c | 9189 | case DW_TAG_ptr_to_member_type: |
c906108c | 9190 | case DW_TAG_reference_type: |
4297a3f0 | 9191 | case DW_TAG_rvalue_reference_type: |
c906108c | 9192 | case DW_TAG_string_type: |
c906108c | 9193 | break; |
134d01f1 | 9194 | |
c906108c | 9195 | case DW_TAG_base_type: |
a02abb62 | 9196 | case DW_TAG_subrange_type: |
cb249c71 | 9197 | case DW_TAG_typedef: |
134d01f1 DJ |
9198 | /* Add a typedef symbol for the type definition, if it has a |
9199 | DW_AT_name. */ | |
f792889a | 9200 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9201 | break; |
c906108c | 9202 | case DW_TAG_common_block: |
e7c27a73 | 9203 | read_common_block (die, cu); |
c906108c SS |
9204 | break; |
9205 | case DW_TAG_common_inclusion: | |
9206 | break; | |
d9fa45fe | 9207 | case DW_TAG_namespace: |
4d4ec4e5 | 9208 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 9209 | read_namespace (die, cu); |
d9fa45fe | 9210 | break; |
5d7cb8df | 9211 | case DW_TAG_module: |
4d4ec4e5 | 9212 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
9213 | read_module (die, cu); |
9214 | break; | |
d9fa45fe | 9215 | case DW_TAG_imported_declaration: |
74921315 KS |
9216 | cu->processing_has_namespace_info = 1; |
9217 | if (read_namespace_alias (die, cu)) | |
9218 | break; | |
9219 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 9220 | case DW_TAG_imported_module: |
4d4ec4e5 | 9221 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
9222 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9223 | || cu->language != language_fortran)) | |
9224 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
9225 | dwarf_tag_name (die->tag)); | |
9226 | read_import_statement (die, cu); | |
d9fa45fe | 9227 | break; |
95554aad TT |
9228 | |
9229 | case DW_TAG_imported_unit: | |
9230 | process_imported_unit_die (die, cu); | |
9231 | break; | |
9232 | ||
c906108c | 9233 | default: |
e7c27a73 | 9234 | new_symbol (die, NULL, cu); |
c906108c SS |
9235 | break; |
9236 | } | |
9237 | } | |
ca69b9e6 DE |
9238 | \f |
9239 | /* DWARF name computation. */ | |
c906108c | 9240 | |
94af9270 KS |
9241 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9242 | needs to have the name of the scope prepended to the name listed in the | |
9243 | die. */ | |
9244 | ||
9245 | static int | |
9246 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9247 | { | |
1c809c68 TT |
9248 | struct attribute *attr; |
9249 | ||
94af9270 KS |
9250 | switch (die->tag) |
9251 | { | |
9252 | case DW_TAG_namespace: | |
9253 | case DW_TAG_typedef: | |
9254 | case DW_TAG_class_type: | |
9255 | case DW_TAG_interface_type: | |
9256 | case DW_TAG_structure_type: | |
9257 | case DW_TAG_union_type: | |
9258 | case DW_TAG_enumeration_type: | |
9259 | case DW_TAG_enumerator: | |
9260 | case DW_TAG_subprogram: | |
08a76f8a | 9261 | case DW_TAG_inlined_subroutine: |
94af9270 | 9262 | case DW_TAG_member: |
74921315 | 9263 | case DW_TAG_imported_declaration: |
94af9270 KS |
9264 | return 1; |
9265 | ||
9266 | case DW_TAG_variable: | |
c2b0a229 | 9267 | case DW_TAG_constant: |
94af9270 KS |
9268 | /* We only need to prefix "globally" visible variables. These include |
9269 | any variable marked with DW_AT_external or any variable that | |
9270 | lives in a namespace. [Variables in anonymous namespaces | |
9271 | require prefixing, but they are not DW_AT_external.] */ | |
9272 | ||
9273 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9274 | { | |
9275 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9276 | |
94af9270 KS |
9277 | return die_needs_namespace (die_specification (die, &spec_cu), |
9278 | spec_cu); | |
9279 | } | |
9280 | ||
1c809c68 | 9281 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9282 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9283 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9284 | return 0; |
9285 | /* A variable in a lexical block of some kind does not need a | |
9286 | namespace, even though in C++ such variables may be external | |
9287 | and have a mangled name. */ | |
9288 | if (die->parent->tag == DW_TAG_lexical_block | |
9289 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9290 | || die->parent->tag == DW_TAG_catch_block |
9291 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9292 | return 0; |
9293 | return 1; | |
94af9270 KS |
9294 | |
9295 | default: | |
9296 | return 0; | |
9297 | } | |
9298 | } | |
9299 | ||
73b9be8b KS |
9300 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9301 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9302 | defined for the given DIE. */ | |
9303 | ||
9304 | static struct attribute * | |
9305 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9306 | { | |
9307 | struct attribute *attr; | |
9308 | ||
9309 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9310 | if (attr == NULL) | |
9311 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9312 | ||
9313 | return attr; | |
9314 | } | |
9315 | ||
9316 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9317 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9318 | defined for the given DIE. */ | |
9319 | ||
9320 | static const char * | |
9321 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9322 | { | |
9323 | const char *linkage_name; | |
9324 | ||
9325 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9326 | if (linkage_name == NULL) | |
9327 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9328 | ||
9329 | return linkage_name; | |
9330 | } | |
9331 | ||
94af9270 | 9332 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9333 | compute the physname for the object, which include a method's: |
9c37b5ae | 9334 | - formal parameters (C++), |
a766d390 | 9335 | - receiver type (Go), |
a766d390 DE |
9336 | |
9337 | The term "physname" is a bit confusing. | |
9338 | For C++, for example, it is the demangled name. | |
9339 | For Go, for example, it's the mangled name. | |
94af9270 | 9340 | |
af6b7be1 JB |
9341 | For Ada, return the DIE's linkage name rather than the fully qualified |
9342 | name. PHYSNAME is ignored.. | |
9343 | ||
94af9270 KS |
9344 | The result is allocated on the objfile_obstack and canonicalized. */ |
9345 | ||
9346 | static const char * | |
15d034d0 TT |
9347 | dwarf2_compute_name (const char *name, |
9348 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9349 | int physname) |
9350 | { | |
bb5ed363 DE |
9351 | struct objfile *objfile = cu->objfile; |
9352 | ||
94af9270 KS |
9353 | if (name == NULL) |
9354 | name = dwarf2_name (die, cu); | |
9355 | ||
2ee7123e DE |
9356 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
9357 | but otherwise compute it by typename_concat inside GDB. | |
9358 | FIXME: Actually this is not really true, or at least not always true. | |
9359 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
9360 | Fortran names because there is no mangling standard. So new_symbol_full | |
9361 | will set the demangled name to the result of dwarf2_full_name, and it is | |
9362 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
9363 | if (cu->language == language_ada |
9364 | || (cu->language == language_fortran && physname)) | |
9365 | { | |
9366 | /* For Ada unit, we prefer the linkage name over the name, as | |
9367 | the former contains the exported name, which the user expects | |
9368 | to be able to reference. Ideally, we want the user to be able | |
9369 | to reference this entity using either natural or linkage name, | |
9370 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 9371 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 9372 | |
2ee7123e DE |
9373 | if (linkage_name != NULL) |
9374 | return linkage_name; | |
f55ee35c JK |
9375 | } |
9376 | ||
94af9270 KS |
9377 | /* These are the only languages we know how to qualify names in. */ |
9378 | if (name != NULL | |
9c37b5ae | 9379 | && (cu->language == language_cplus |
c44af4eb TT |
9380 | || cu->language == language_fortran || cu->language == language_d |
9381 | || cu->language == language_rust)) | |
94af9270 KS |
9382 | { |
9383 | if (die_needs_namespace (die, cu)) | |
9384 | { | |
9385 | long length; | |
0d5cff50 | 9386 | const char *prefix; |
34a68019 | 9387 | const char *canonical_name = NULL; |
94af9270 | 9388 | |
d7e74731 PA |
9389 | string_file buf; |
9390 | ||
94af9270 | 9391 | prefix = determine_prefix (die, cu); |
94af9270 KS |
9392 | if (*prefix != '\0') |
9393 | { | |
f55ee35c JK |
9394 | char *prefixed_name = typename_concat (NULL, prefix, name, |
9395 | physname, cu); | |
9a619af0 | 9396 | |
d7e74731 | 9397 | buf.puts (prefixed_name); |
94af9270 KS |
9398 | xfree (prefixed_name); |
9399 | } | |
9400 | else | |
d7e74731 | 9401 | buf.puts (name); |
94af9270 | 9402 | |
98bfdba5 PA |
9403 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
9404 | as children with DW_TAG_template_type_param or | |
9405 | DW_TAG_value_type_param. If the latter, add them to the name | |
9406 | here. If the name already has template parameters, then | |
9407 | skip this step; some versions of GCC emit both, and | |
9408 | it is more efficient to use the pre-computed name. | |
9409 | ||
9410 | Something to keep in mind about this process: it is very | |
9411 | unlikely, or in some cases downright impossible, to produce | |
9412 | something that will match the mangled name of a function. | |
9413 | If the definition of the function has the same debug info, | |
9414 | we should be able to match up with it anyway. But fallbacks | |
9415 | using the minimal symbol, for instance to find a method | |
9416 | implemented in a stripped copy of libstdc++, will not work. | |
9417 | If we do not have debug info for the definition, we will have to | |
9418 | match them up some other way. | |
9419 | ||
9420 | When we do name matching there is a related problem with function | |
9421 | templates; two instantiated function templates are allowed to | |
9422 | differ only by their return types, which we do not add here. */ | |
9423 | ||
9424 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
9425 | { | |
9426 | struct attribute *attr; | |
9427 | struct die_info *child; | |
9428 | int first = 1; | |
9429 | ||
9430 | die->building_fullname = 1; | |
9431 | ||
9432 | for (child = die->child; child != NULL; child = child->sibling) | |
9433 | { | |
9434 | struct type *type; | |
12df843f | 9435 | LONGEST value; |
d521ce57 | 9436 | const gdb_byte *bytes; |
98bfdba5 PA |
9437 | struct dwarf2_locexpr_baton *baton; |
9438 | struct value *v; | |
9439 | ||
9440 | if (child->tag != DW_TAG_template_type_param | |
9441 | && child->tag != DW_TAG_template_value_param) | |
9442 | continue; | |
9443 | ||
9444 | if (first) | |
9445 | { | |
d7e74731 | 9446 | buf.puts ("<"); |
98bfdba5 PA |
9447 | first = 0; |
9448 | } | |
9449 | else | |
d7e74731 | 9450 | buf.puts (", "); |
98bfdba5 PA |
9451 | |
9452 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
9453 | if (attr == NULL) | |
9454 | { | |
9455 | complaint (&symfile_complaints, | |
9456 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 9457 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
9458 | continue; |
9459 | } | |
9460 | type = die_type (child, cu); | |
9461 | ||
9462 | if (child->tag == DW_TAG_template_type_param) | |
9463 | { | |
d7e74731 | 9464 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
9465 | continue; |
9466 | } | |
9467 | ||
9468 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
9469 | if (attr == NULL) | |
9470 | { | |
9471 | complaint (&symfile_complaints, | |
3e43a32a MS |
9472 | _("template parameter missing " |
9473 | "DW_AT_const_value")); | |
d7e74731 | 9474 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
9475 | continue; |
9476 | } | |
9477 | ||
9478 | dwarf2_const_value_attr (attr, type, name, | |
9479 | &cu->comp_unit_obstack, cu, | |
9480 | &value, &bytes, &baton); | |
9481 | ||
9482 | if (TYPE_NOSIGN (type)) | |
9483 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
9484 | changed, this can use value_print instead. */ | |
d7e74731 | 9485 | c_printchar (value, type, &buf); |
98bfdba5 PA |
9486 | else |
9487 | { | |
9488 | struct value_print_options opts; | |
9489 | ||
9490 | if (baton != NULL) | |
9491 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
9492 | baton->data, | |
9493 | baton->size, | |
9494 | baton->per_cu); | |
9495 | else if (bytes != NULL) | |
9496 | { | |
9497 | v = allocate_value (type); | |
9498 | memcpy (value_contents_writeable (v), bytes, | |
9499 | TYPE_LENGTH (type)); | |
9500 | } | |
9501 | else | |
9502 | v = value_from_longest (type, value); | |
9503 | ||
3e43a32a MS |
9504 | /* Specify decimal so that we do not depend on |
9505 | the radix. */ | |
98bfdba5 PA |
9506 | get_formatted_print_options (&opts, 'd'); |
9507 | opts.raw = 1; | |
d7e74731 | 9508 | value_print (v, &buf, &opts); |
98bfdba5 PA |
9509 | release_value (v); |
9510 | value_free (v); | |
9511 | } | |
9512 | } | |
9513 | ||
9514 | die->building_fullname = 0; | |
9515 | ||
9516 | if (!first) | |
9517 | { | |
9518 | /* Close the argument list, with a space if necessary | |
9519 | (nested templates). */ | |
d7e74731 PA |
9520 | if (!buf.empty () && buf.string ().back () == '>') |
9521 | buf.puts (" >"); | |
98bfdba5 | 9522 | else |
d7e74731 | 9523 | buf.puts (">"); |
98bfdba5 PA |
9524 | } |
9525 | } | |
9526 | ||
9c37b5ae | 9527 | /* For C++ methods, append formal parameter type |
94af9270 | 9528 | information, if PHYSNAME. */ |
6e70227d | 9529 | |
94af9270 | 9530 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 9531 | && cu->language == language_cplus) |
94af9270 KS |
9532 | { |
9533 | struct type *type = read_type_die (die, cu); | |
9534 | ||
d7e74731 | 9535 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 9536 | &type_print_raw_options); |
94af9270 | 9537 | |
9c37b5ae | 9538 | if (cu->language == language_cplus) |
94af9270 | 9539 | { |
60430eff DJ |
9540 | /* Assume that an artificial first parameter is |
9541 | "this", but do not crash if it is not. RealView | |
9542 | marks unnamed (and thus unused) parameters as | |
9543 | artificial; there is no way to differentiate | |
9544 | the two cases. */ | |
94af9270 KS |
9545 | if (TYPE_NFIELDS (type) > 0 |
9546 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 9547 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
9548 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
9549 | 0)))) | |
d7e74731 | 9550 | buf.puts (" const"); |
94af9270 KS |
9551 | } |
9552 | } | |
9553 | ||
d7e74731 | 9554 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
9555 | |
9556 | if (cu->language == language_cplus) | |
34a68019 | 9557 | canonical_name |
322a8516 | 9558 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
9559 | &objfile->per_bfd->storage_obstack); |
9560 | ||
9561 | /* If we only computed INTERMEDIATE_NAME, or if | |
9562 | INTERMEDIATE_NAME is already canonical, then we need to | |
9563 | copy it to the appropriate obstack. */ | |
322a8516 | 9564 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
9565 | name = ((const char *) |
9566 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
9567 | intermediate_name.c_str (), |
9568 | intermediate_name.length ())); | |
34a68019 TT |
9569 | else |
9570 | name = canonical_name; | |
94af9270 KS |
9571 | } |
9572 | } | |
9573 | ||
9574 | return name; | |
9575 | } | |
9576 | ||
0114d602 DJ |
9577 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9578 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9579 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9580 | not have a name. NAME may either be from a previous call to |
9581 | dwarf2_name or NULL. | |
9582 | ||
9c37b5ae | 9583 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9584 | |
9585 | static const char * | |
15d034d0 | 9586 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 9587 | { |
94af9270 KS |
9588 | return dwarf2_compute_name (name, die, cu, 0); |
9589 | } | |
0114d602 | 9590 | |
94af9270 KS |
9591 | /* Construct a physname for the given DIE in CU. NAME may either be |
9592 | from a previous call to dwarf2_name or NULL. The result will be | |
9593 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9594 | name. | |
0114d602 | 9595 | |
9c37b5ae | 9596 | The output string will be canonicalized (if C++). */ |
0114d602 | 9597 | |
94af9270 | 9598 | static const char * |
15d034d0 | 9599 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9600 | { |
bb5ed363 | 9601 | struct objfile *objfile = cu->objfile; |
900e11f9 | 9602 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
9603 | int need_copy = 1; |
9604 | ||
9605 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9606 | on its own. */ | |
9607 | if (!die_needs_namespace (die, cu)) | |
9608 | return dwarf2_compute_name (name, die, cu, 1); | |
9609 | ||
73b9be8b | 9610 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9611 | |
e98c9e7c TT |
9612 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9613 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9614 | if (cu->language == language_rust && mangled != NULL | |
9615 | && strchr (mangled, '{') != NULL) | |
9616 | mangled = NULL; | |
9617 | ||
900e11f9 JK |
9618 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9619 | has computed. */ | |
791afaa2 | 9620 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 9621 | if (mangled != NULL) |
900e11f9 | 9622 | { |
900e11f9 JK |
9623 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9624 | type. It is easier for GDB users to search for such functions as | |
9625 | `name(params)' than `long name(params)'. In such case the minimal | |
9626 | symbol names do not match the full symbol names but for template | |
9627 | functions there is never a need to look up their definition from their | |
9628 | declaration so the only disadvantage remains the minimal symbol | |
9629 | variant `long name(params)' does not have the proper inferior type. | |
9630 | */ | |
9631 | ||
a766d390 DE |
9632 | if (cu->language == language_go) |
9633 | { | |
9634 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9635 | new_symbol_full assumes we return the mangled name. | |
9636 | This just undoes that lie until things are cleaned up. */ | |
a766d390 DE |
9637 | } |
9638 | else | |
9639 | { | |
791afaa2 TT |
9640 | demangled.reset (gdb_demangle (mangled, |
9641 | (DMGL_PARAMS | DMGL_ANSI | |
9642 | | DMGL_RET_DROP))); | |
a766d390 | 9643 | } |
900e11f9 | 9644 | if (demangled) |
791afaa2 | 9645 | canon = demangled.get (); |
900e11f9 JK |
9646 | else |
9647 | { | |
9648 | canon = mangled; | |
9649 | need_copy = 0; | |
9650 | } | |
9651 | } | |
9652 | ||
9653 | if (canon == NULL || check_physname) | |
9654 | { | |
9655 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9656 | ||
9657 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9658 | { | |
9659 | /* It may not mean a bug in GDB. The compiler could also | |
9660 | compute DW_AT_linkage_name incorrectly. But in such case | |
9661 | GDB would need to be bug-to-bug compatible. */ | |
9662 | ||
9663 | complaint (&symfile_complaints, | |
9664 | _("Computed physname <%s> does not match demangled <%s> " | |
9665 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9666 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9667 | objfile_name (objfile)); |
900e11f9 JK |
9668 | |
9669 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9670 | is available here - over computed PHYSNAME. It is safer | |
9671 | against both buggy GDB and buggy compilers. */ | |
9672 | ||
9673 | retval = canon; | |
9674 | } | |
9675 | else | |
9676 | { | |
9677 | retval = physname; | |
9678 | need_copy = 0; | |
9679 | } | |
9680 | } | |
9681 | else | |
9682 | retval = canon; | |
9683 | ||
9684 | if (need_copy) | |
224c3ddb SM |
9685 | retval = ((const char *) |
9686 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9687 | retval, strlen (retval))); | |
900e11f9 | 9688 | |
900e11f9 | 9689 | return retval; |
0114d602 DJ |
9690 | } |
9691 | ||
74921315 KS |
9692 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9693 | a new symbol for it. | |
9694 | ||
9695 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9696 | ||
9697 | static int | |
9698 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9699 | { | |
9700 | struct attribute *attr; | |
9701 | ||
9702 | /* If the die does not have a name, this is not a namespace | |
9703 | alias. */ | |
9704 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9705 | if (attr != NULL) | |
9706 | { | |
9707 | int num; | |
9708 | struct die_info *d = die; | |
9709 | struct dwarf2_cu *imported_cu = cu; | |
9710 | ||
9711 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9712 | keep inspecting DIEs until we hit the underlying import. */ | |
9713 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9714 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9715 | { | |
9716 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
9717 | if (attr == NULL) | |
9718 | break; | |
9719 | ||
9720 | d = follow_die_ref (d, attr, &imported_cu); | |
9721 | if (d->tag != DW_TAG_imported_declaration) | |
9722 | break; | |
9723 | } | |
9724 | ||
9725 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
9726 | { | |
9727 | complaint (&symfile_complaints, | |
9728 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 9729 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
9730 | return 0; |
9731 | } | |
9732 | ||
9733 | if (attr != NULL) | |
9734 | { | |
9735 | struct type *type; | |
9c541725 | 9736 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 9737 | |
9c541725 | 9738 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
9739 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
9740 | { | |
9741 | /* This declaration is a global namespace alias. Add | |
9742 | a symbol for it whose type is the aliased namespace. */ | |
9743 | new_symbol (die, type, cu); | |
9744 | return 1; | |
9745 | } | |
9746 | } | |
9747 | } | |
9748 | ||
9749 | return 0; | |
9750 | } | |
9751 | ||
22cee43f PMR |
9752 | /* Return the using directives repository (global or local?) to use in the |
9753 | current context for LANGUAGE. | |
9754 | ||
9755 | For Ada, imported declarations can materialize renamings, which *may* be | |
9756 | global. However it is impossible (for now?) in DWARF to distinguish | |
9757 | "external" imported declarations and "static" ones. As all imported | |
9758 | declarations seem to be static in all other languages, make them all CU-wide | |
9759 | global only in Ada. */ | |
9760 | ||
9761 | static struct using_direct ** | |
9762 | using_directives (enum language language) | |
9763 | { | |
9764 | if (language == language_ada && context_stack_depth == 0) | |
9765 | return &global_using_directives; | |
9766 | else | |
9767 | return &local_using_directives; | |
9768 | } | |
9769 | ||
27aa8d6a SW |
9770 | /* Read the import statement specified by the given die and record it. */ |
9771 | ||
9772 | static void | |
9773 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
9774 | { | |
bb5ed363 | 9775 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 9776 | struct attribute *import_attr; |
32019081 | 9777 | struct die_info *imported_die, *child_die; |
de4affc9 | 9778 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 9779 | const char *imported_name; |
794684b6 | 9780 | const char *imported_name_prefix; |
13387711 SW |
9781 | const char *canonical_name; |
9782 | const char *import_alias; | |
9783 | const char *imported_declaration = NULL; | |
794684b6 | 9784 | const char *import_prefix; |
eb1e02fd | 9785 | std::vector<const char *> excludes; |
13387711 | 9786 | |
27aa8d6a SW |
9787 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
9788 | if (import_attr == NULL) | |
9789 | { | |
9790 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9791 | dwarf_tag_name (die->tag)); | |
9792 | return; | |
9793 | } | |
9794 | ||
de4affc9 CC |
9795 | imported_cu = cu; |
9796 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
9797 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
9798 | if (imported_name == NULL) |
9799 | { | |
9800 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
9801 | ||
9802 | The import in the following code: | |
9803 | namespace A | |
9804 | { | |
9805 | typedef int B; | |
9806 | } | |
9807 | ||
9808 | int main () | |
9809 | { | |
9810 | using A::B; | |
9811 | B b; | |
9812 | return b; | |
9813 | } | |
9814 | ||
9815 | ... | |
9816 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
9817 | <52> DW_AT_decl_file : 1 | |
9818 | <53> DW_AT_decl_line : 6 | |
9819 | <54> DW_AT_import : <0x75> | |
9820 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
9821 | <59> DW_AT_name : B | |
9822 | <5b> DW_AT_decl_file : 1 | |
9823 | <5c> DW_AT_decl_line : 2 | |
9824 | <5d> DW_AT_type : <0x6e> | |
9825 | ... | |
9826 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
9827 | <76> DW_AT_byte_size : 4 | |
9828 | <77> DW_AT_encoding : 5 (signed) | |
9829 | ||
9830 | imports the wrong die ( 0x75 instead of 0x58 ). | |
9831 | This case will be ignored until the gcc bug is fixed. */ | |
9832 | return; | |
9833 | } | |
9834 | ||
82856980 SW |
9835 | /* Figure out the local name after import. */ |
9836 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 9837 | |
794684b6 SW |
9838 | /* Figure out where the statement is being imported to. */ |
9839 | import_prefix = determine_prefix (die, cu); | |
9840 | ||
9841 | /* Figure out what the scope of the imported die is and prepend it | |
9842 | to the name of the imported die. */ | |
de4affc9 | 9843 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 9844 | |
f55ee35c JK |
9845 | if (imported_die->tag != DW_TAG_namespace |
9846 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 9847 | { |
13387711 SW |
9848 | imported_declaration = imported_name; |
9849 | canonical_name = imported_name_prefix; | |
794684b6 | 9850 | } |
13387711 | 9851 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 9852 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
9853 | imported_name_prefix, |
9854 | (cu->language == language_d ? "." : "::"), | |
9855 | imported_name, (char *) NULL); | |
13387711 SW |
9856 | else |
9857 | canonical_name = imported_name; | |
794684b6 | 9858 | |
32019081 JK |
9859 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
9860 | for (child_die = die->child; child_die && child_die->tag; | |
9861 | child_die = sibling_die (child_die)) | |
9862 | { | |
9863 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
9864 | represented by an imported module entry with an import attribute | |
9865 | referring to the module and owned entries corresponding to those | |
9866 | entities that are renamed as part of being imported. */ | |
9867 | ||
9868 | if (child_die->tag != DW_TAG_imported_declaration) | |
9869 | { | |
9870 | complaint (&symfile_complaints, | |
9871 | _("child DW_TAG_imported_declaration expected " | |
9872 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 9873 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9874 | continue; |
9875 | } | |
9876 | ||
9877 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
9878 | if (import_attr == NULL) | |
9879 | { | |
9880 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9881 | dwarf_tag_name (child_die->tag)); | |
9882 | continue; | |
9883 | } | |
9884 | ||
9885 | imported_cu = cu; | |
9886 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9887 | &imported_cu); | |
9888 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9889 | if (imported_name == NULL) | |
9890 | { | |
9891 | complaint (&symfile_complaints, | |
9892 | _("child DW_TAG_imported_declaration has unknown " | |
9893 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 9894 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9895 | continue; |
9896 | } | |
9897 | ||
eb1e02fd | 9898 | excludes.push_back (imported_name); |
32019081 JK |
9899 | |
9900 | process_die (child_die, cu); | |
9901 | } | |
9902 | ||
22cee43f PMR |
9903 | add_using_directive (using_directives (cu->language), |
9904 | import_prefix, | |
9905 | canonical_name, | |
9906 | import_alias, | |
9907 | imported_declaration, | |
9908 | excludes, | |
9909 | 0, | |
9910 | &objfile->objfile_obstack); | |
27aa8d6a SW |
9911 | } |
9912 | ||
5230b05a WT |
9913 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
9914 | types, but gives them a size of zero. Starting with version 14, | |
9915 | ICC is compatible with GCC. */ | |
9916 | ||
9917 | static int | |
9918 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
9919 | { | |
9920 | if (!cu->checked_producer) | |
9921 | check_producer (cu); | |
9922 | ||
9923 | return cu->producer_is_icc_lt_14; | |
9924 | } | |
9925 | ||
1b80a9fa JK |
9926 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9927 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9928 | this, it was first present in GCC release 4.3.0. */ | |
9929 | ||
9930 | static int | |
9931 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9932 | { | |
9933 | if (!cu->checked_producer) | |
9934 | check_producer (cu); | |
9935 | ||
9936 | return cu->producer_is_gcc_lt_4_3; | |
9937 | } | |
9938 | ||
d721ba37 PA |
9939 | static file_and_directory |
9940 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 9941 | { |
d721ba37 PA |
9942 | file_and_directory res; |
9943 | ||
9291a0cd TT |
9944 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9945 | is not a source language identifier. */ | |
d721ba37 PA |
9946 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
9947 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9948 | |
d721ba37 PA |
9949 | if (res.comp_dir == NULL |
9950 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
9951 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 9952 | { |
d721ba37 PA |
9953 | res.comp_dir_storage = ldirname (res.name); |
9954 | if (!res.comp_dir_storage.empty ()) | |
9955 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 9956 | } |
d721ba37 | 9957 | if (res.comp_dir != NULL) |
9291a0cd TT |
9958 | { |
9959 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9960 | directory, get rid of it. */ | |
d721ba37 | 9961 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 9962 | |
d721ba37 PA |
9963 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
9964 | res.comp_dir = cp + 1; | |
9291a0cd TT |
9965 | } |
9966 | ||
d721ba37 PA |
9967 | if (res.name == NULL) |
9968 | res.name = "<unknown>"; | |
9969 | ||
9970 | return res; | |
9291a0cd TT |
9971 | } |
9972 | ||
f4dc4d17 DE |
9973 | /* Handle DW_AT_stmt_list for a compilation unit. |
9974 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9975 | COMP_DIR is the compilation directory. LOWPC is passed to |
9976 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9977 | |
9978 | static void | |
9979 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9980 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9981 | { |
527f3840 | 9982 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9983 | struct attribute *attr; |
527f3840 JK |
9984 | struct line_header line_header_local; |
9985 | hashval_t line_header_local_hash; | |
9986 | unsigned u; | |
9987 | void **slot; | |
9988 | int decode_mapping; | |
2ab95328 | 9989 | |
f4dc4d17 DE |
9990 | gdb_assert (! cu->per_cu->is_debug_types); |
9991 | ||
2ab95328 | 9992 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9993 | if (attr == NULL) |
9994 | return; | |
9995 | ||
9c541725 | 9996 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
9997 | |
9998 | /* The line header hash table is only created if needed (it exists to | |
9999 | prevent redundant reading of the line table for partial_units). | |
10000 | If we're given a partial_unit, we'll need it. If we're given a | |
10001 | compile_unit, then use the line header hash table if it's already | |
10002 | created, but don't create one just yet. */ | |
10003 | ||
10004 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10005 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10006 | { |
527f3840 JK |
10007 | dwarf2_per_objfile->line_header_hash |
10008 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
10009 | line_header_eq_voidp, | |
10010 | free_line_header_voidp, | |
10011 | &objfile->objfile_obstack, | |
10012 | hashtab_obstack_allocate, | |
10013 | dummy_obstack_deallocate); | |
10014 | } | |
2ab95328 | 10015 | |
9c541725 | 10016 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10017 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10018 | line_header_local_hash = line_header_hash (&line_header_local); | |
10019 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10020 | { | |
10021 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10022 | &line_header_local, | |
10023 | line_header_local_hash, NO_INSERT); | |
10024 | ||
10025 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10026 | is not present in *SLOT (since if there is something in *SLOT then | |
10027 | it will be for a partial_unit). */ | |
10028 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10029 | { |
527f3840 | 10030 | gdb_assert (*slot != NULL); |
9a3c8263 | 10031 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10032 | return; |
dee91e82 | 10033 | } |
2ab95328 | 10034 | } |
527f3840 JK |
10035 | |
10036 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10037 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10038 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10039 | if (lh == NULL) | |
527f3840 | 10040 | return; |
4c8aa72d PA |
10041 | |
10042 | cu->line_header = lh.release (); | |
10043 | cu->line_header_die_owner = die; | |
527f3840 JK |
10044 | |
10045 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10046 | slot = NULL; | |
10047 | else | |
10048 | { | |
10049 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
10050 | &line_header_local, | |
10051 | line_header_local_hash, INSERT); | |
10052 | gdb_assert (slot != NULL); | |
10053 | } | |
10054 | if (slot != NULL && *slot == NULL) | |
10055 | { | |
10056 | /* This newly decoded line number information unit will be owned | |
10057 | by line_header_hash hash table. */ | |
10058 | *slot = cu->line_header; | |
4c8aa72d | 10059 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10060 | } |
10061 | else | |
10062 | { | |
10063 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10064 | may be already used by multiple CUs. Create only temporary decoded | |
10065 | line_header for this CU - it may happen at most once for each line | |
10066 | number information unit. And if we're not using line_header_hash | |
10067 | then this is what we want as well. */ | |
10068 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10069 | } |
10070 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10071 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10072 | decode_mapping); | |
fff8551c | 10073 | |
2ab95328 TT |
10074 | } |
10075 | ||
95554aad | 10076 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10077 | |
c906108c | 10078 | static void |
e7c27a73 | 10079 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10080 | { |
dee91e82 | 10081 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10082 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10083 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10084 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10085 | struct attribute *attr; | |
c906108c | 10086 | struct die_info *child_die; |
e142c38c | 10087 | CORE_ADDR baseaddr; |
6e70227d | 10088 | |
e142c38c | 10089 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 10090 | |
fae299cd | 10091 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10092 | |
10093 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10094 | from finish_block. */ | |
2acceee2 | 10095 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10096 | lowpc = highpc; |
3e29f34a | 10097 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10098 | |
d721ba37 | 10099 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10100 | |
95554aad | 10101 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 10102 | |
f4b8a18d KW |
10103 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10104 | standardised yet. As a workaround for the language detection we fall | |
10105 | back to the DW_AT_producer string. */ | |
10106 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10107 | cu->language = language_opencl; | |
10108 | ||
3019eac3 DE |
10109 | /* Similar hack for Go. */ |
10110 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10111 | set_cu_language (DW_LANG_Go, cu); | |
10112 | ||
d721ba37 | 10113 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10114 | |
10115 | /* Decode line number information if present. We do this before | |
10116 | processing child DIEs, so that the line header table is available | |
10117 | for DW_AT_decl_file. */ | |
d721ba37 | 10118 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10119 | |
10120 | /* Process all dies in compilation unit. */ | |
10121 | if (die->child != NULL) | |
10122 | { | |
10123 | child_die = die->child; | |
10124 | while (child_die && child_die->tag) | |
10125 | { | |
10126 | process_die (child_die, cu); | |
10127 | child_die = sibling_die (child_die); | |
10128 | } | |
10129 | } | |
10130 | ||
10131 | /* Decode macro information, if present. Dwarf 2 macro information | |
10132 | refers to information in the line number info statement program | |
10133 | header, so we can only read it if we've read the header | |
10134 | successfully. */ | |
0af92d60 JK |
10135 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10136 | if (attr == NULL) | |
10137 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10138 | if (attr && cu->line_header) |
10139 | { | |
10140 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
10141 | complaint (&symfile_complaints, | |
0af92d60 | 10142 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10143 | |
43f3e411 | 10144 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10145 | } |
10146 | else | |
10147 | { | |
10148 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10149 | if (attr && cu->line_header) | |
10150 | { | |
10151 | unsigned int macro_offset = DW_UNSND (attr); | |
10152 | ||
43f3e411 | 10153 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10154 | } |
10155 | } | |
3019eac3 DE |
10156 | } |
10157 | ||
f4dc4d17 DE |
10158 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
10159 | Create the set of symtabs used by this TU, or if this TU is sharing | |
10160 | symtabs with another TU and the symtabs have already been created | |
10161 | then restore those symtabs in the line header. | |
10162 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
10163 | |
10164 | static void | |
f4dc4d17 | 10165 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 10166 | { |
f4dc4d17 DE |
10167 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
10168 | struct type_unit_group *tu_group; | |
10169 | int first_time; | |
3019eac3 | 10170 | struct attribute *attr; |
9c541725 | 10171 | unsigned int i; |
0186c6a7 | 10172 | struct signatured_type *sig_type; |
3019eac3 | 10173 | |
f4dc4d17 | 10174 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10175 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10176 | |
f4dc4d17 | 10177 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 10178 | |
f4dc4d17 | 10179 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10180 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
10181 | if (sig_type->type_unit_group == NULL) |
10182 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
10183 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
10184 | |
10185 | /* If we've already processed this stmt_list there's no real need to | |
10186 | do it again, we could fake it and just recreate the part we need | |
10187 | (file name,index -> symtab mapping). If data shows this optimization | |
10188 | is useful we can do it then. */ | |
43f3e411 | 10189 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10190 | |
10191 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10192 | debug info. */ | |
fff8551c | 10193 | line_header_up lh; |
f4dc4d17 | 10194 | if (attr != NULL) |
3019eac3 | 10195 | { |
9c541725 | 10196 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
10197 | lh = dwarf_decode_line_header (line_offset, cu); |
10198 | } | |
10199 | if (lh == NULL) | |
10200 | { | |
10201 | if (first_time) | |
10202 | dwarf2_start_symtab (cu, "", NULL, 0); | |
10203 | else | |
10204 | { | |
10205 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 10206 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10207 | } |
f4dc4d17 | 10208 | return; |
3019eac3 DE |
10209 | } |
10210 | ||
4c8aa72d PA |
10211 | cu->line_header = lh.release (); |
10212 | cu->line_header_die_owner = die; | |
3019eac3 | 10213 | |
f4dc4d17 DE |
10214 | if (first_time) |
10215 | { | |
43f3e411 | 10216 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 10217 | |
1fd60fc0 DE |
10218 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10219 | still initializing it, and our caller (a few levels up) | |
10220 | process_full_type_unit still needs to know if this is the first | |
10221 | time. */ | |
10222 | ||
4c8aa72d PA |
10223 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
10224 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
10225 | cu->line_header->file_names.size ()); | |
3019eac3 | 10226 | |
4c8aa72d | 10227 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10228 | { |
4c8aa72d | 10229 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 10230 | |
4c8aa72d | 10231 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 10232 | |
f4dc4d17 DE |
10233 | if (current_subfile->symtab == NULL) |
10234 | { | |
4c8aa72d PA |
10235 | /* NOTE: start_subfile will recognize when it's been |
10236 | passed a file it has already seen. So we can't | |
10237 | assume there's a simple mapping from | |
10238 | cu->line_header->file_names to subfiles, plus | |
10239 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
10240 | current_subfile->symtab |
10241 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
10242 | } |
10243 | ||
8c43009f PA |
10244 | fe.symtab = current_subfile->symtab; |
10245 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
10246 | } |
10247 | } | |
10248 | else | |
3019eac3 | 10249 | { |
0ab9ce85 | 10250 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 10251 | |
4c8aa72d | 10252 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 10253 | { |
4c8aa72d | 10254 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 10255 | |
4c8aa72d | 10256 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10257 | } |
3019eac3 DE |
10258 | } |
10259 | ||
f4dc4d17 DE |
10260 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10261 | so they don't have a "real" (so to speak) symtab anyway. | |
10262 | There is later code that will assign the main symtab to all symbols | |
10263 | that don't have one. We need to handle the case of a symbol with a | |
10264 | missing symtab (DW_AT_decl_file) anyway. */ | |
10265 | } | |
3019eac3 | 10266 | |
f4dc4d17 DE |
10267 | /* Process DW_TAG_type_unit. |
10268 | For TUs we want to skip the first top level sibling if it's not the | |
10269 | actual type being defined by this TU. In this case the first top | |
10270 | level sibling is there to provide context only. */ | |
3019eac3 | 10271 | |
f4dc4d17 DE |
10272 | static void |
10273 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10274 | { | |
10275 | struct die_info *child_die; | |
3019eac3 | 10276 | |
f4dc4d17 DE |
10277 | prepare_one_comp_unit (cu, die, language_minimal); |
10278 | ||
10279 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10280 | We do this before processing child DIEs, so that the line header table | |
10281 | is available for DW_AT_decl_file. */ | |
10282 | setup_type_unit_groups (die, cu); | |
10283 | ||
10284 | if (die->child != NULL) | |
10285 | { | |
10286 | child_die = die->child; | |
10287 | while (child_die && child_die->tag) | |
10288 | { | |
10289 | process_die (child_die, cu); | |
10290 | child_die = sibling_die (child_die); | |
10291 | } | |
10292 | } | |
3019eac3 DE |
10293 | } |
10294 | \f | |
80626a55 DE |
10295 | /* DWO/DWP files. |
10296 | ||
10297 | http://gcc.gnu.org/wiki/DebugFission | |
10298 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10299 | ||
10300 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10301 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10302 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10303 | |
10304 | static hashval_t | |
10305 | hash_dwo_file (const void *item) | |
10306 | { | |
9a3c8263 | 10307 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10308 | hashval_t hash; |
3019eac3 | 10309 | |
a2ce51a0 DE |
10310 | hash = htab_hash_string (dwo_file->dwo_name); |
10311 | if (dwo_file->comp_dir != NULL) | |
10312 | hash += htab_hash_string (dwo_file->comp_dir); | |
10313 | return hash; | |
3019eac3 DE |
10314 | } |
10315 | ||
10316 | static int | |
10317 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10318 | { | |
9a3c8263 SM |
10319 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10320 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10321 | |
a2ce51a0 DE |
10322 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10323 | return 0; | |
10324 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10325 | return lhs->comp_dir == rhs->comp_dir; | |
10326 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10327 | } |
10328 | ||
10329 | /* Allocate a hash table for DWO files. */ | |
10330 | ||
10331 | static htab_t | |
10332 | allocate_dwo_file_hash_table (void) | |
10333 | { | |
10334 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10335 | ||
10336 | return htab_create_alloc_ex (41, | |
10337 | hash_dwo_file, | |
10338 | eq_dwo_file, | |
10339 | NULL, | |
10340 | &objfile->objfile_obstack, | |
10341 | hashtab_obstack_allocate, | |
10342 | dummy_obstack_deallocate); | |
10343 | } | |
10344 | ||
80626a55 DE |
10345 | /* Lookup DWO file DWO_NAME. */ |
10346 | ||
10347 | static void ** | |
0ac5b59e | 10348 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
10349 | { |
10350 | struct dwo_file find_entry; | |
10351 | void **slot; | |
10352 | ||
10353 | if (dwarf2_per_objfile->dwo_files == NULL) | |
10354 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
10355 | ||
10356 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
10357 | find_entry.dwo_name = dwo_name; |
10358 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
10359 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
10360 | ||
10361 | return slot; | |
10362 | } | |
10363 | ||
3019eac3 DE |
10364 | static hashval_t |
10365 | hash_dwo_unit (const void *item) | |
10366 | { | |
9a3c8263 | 10367 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
10368 | |
10369 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
10370 | return dwo_unit->signature; | |
10371 | } | |
10372 | ||
10373 | static int | |
10374 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
10375 | { | |
9a3c8263 SM |
10376 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
10377 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
10378 | |
10379 | /* The signature is assumed to be unique within the DWO file. | |
10380 | So while object file CU dwo_id's always have the value zero, | |
10381 | that's OK, assuming each object file DWO file has only one CU, | |
10382 | and that's the rule for now. */ | |
10383 | return lhs->signature == rhs->signature; | |
10384 | } | |
10385 | ||
10386 | /* Allocate a hash table for DWO CUs,TUs. | |
10387 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
10388 | ||
10389 | static htab_t | |
10390 | allocate_dwo_unit_table (struct objfile *objfile) | |
10391 | { | |
10392 | /* Start out with a pretty small number. | |
10393 | Generally DWO files contain only one CU and maybe some TUs. */ | |
10394 | return htab_create_alloc_ex (3, | |
10395 | hash_dwo_unit, | |
10396 | eq_dwo_unit, | |
10397 | NULL, | |
10398 | &objfile->objfile_obstack, | |
10399 | hashtab_obstack_allocate, | |
10400 | dummy_obstack_deallocate); | |
10401 | } | |
10402 | ||
80626a55 | 10403 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 10404 | |
19c3d4c9 | 10405 | struct create_dwo_cu_data |
3019eac3 DE |
10406 | { |
10407 | struct dwo_file *dwo_file; | |
19c3d4c9 | 10408 | struct dwo_unit dwo_unit; |
3019eac3 DE |
10409 | }; |
10410 | ||
19c3d4c9 | 10411 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
10412 | |
10413 | static void | |
19c3d4c9 DE |
10414 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
10415 | const gdb_byte *info_ptr, | |
10416 | struct die_info *comp_unit_die, | |
10417 | int has_children, | |
10418 | void *datap) | |
3019eac3 DE |
10419 | { |
10420 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 10421 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 10422 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 10423 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 10424 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 10425 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 10426 | struct attribute *attr; |
3019eac3 DE |
10427 | |
10428 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
10429 | if (attr == NULL) | |
10430 | { | |
19c3d4c9 DE |
10431 | complaint (&symfile_complaints, |
10432 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
10433 | " its dwo_id [in module %s]"), | |
9c541725 | 10434 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
10435 | return; |
10436 | } | |
10437 | ||
3019eac3 DE |
10438 | dwo_unit->dwo_file = dwo_file; |
10439 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 10440 | dwo_unit->section = section; |
9c541725 | 10441 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
10442 | dwo_unit->length = cu->per_cu->length; |
10443 | ||
b4f54984 | 10444 | if (dwarf_read_debug) |
4031ecc5 | 10445 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
10446 | to_underlying (sect_off), |
10447 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
10448 | } |
10449 | ||
33c5cd75 | 10450 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 10451 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 10452 | |
33c5cd75 DB |
10453 | static void |
10454 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
10455 | htab_t &cus_htab) | |
3019eac3 DE |
10456 | { |
10457 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
33c5cd75 | 10458 | const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev; |
d521ce57 | 10459 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 10460 | |
33c5cd75 DB |
10461 | dwarf2_read_section (objfile, §ion); |
10462 | info_ptr = section.buffer; | |
3019eac3 DE |
10463 | |
10464 | if (info_ptr == NULL) | |
33c5cd75 | 10465 | return; |
3019eac3 | 10466 | |
b4f54984 | 10467 | if (dwarf_read_debug) |
19c3d4c9 DE |
10468 | { |
10469 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
10470 | get_section_name (§ion), |
10471 | get_section_file_name (§ion)); | |
19c3d4c9 | 10472 | } |
3019eac3 | 10473 | |
33c5cd75 | 10474 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
10475 | while (info_ptr < end_ptr) |
10476 | { | |
10477 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
10478 | struct create_dwo_cu_data create_dwo_cu_data; |
10479 | struct dwo_unit *dwo_unit; | |
10480 | void **slot; | |
10481 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 10482 | |
19c3d4c9 DE |
10483 | memset (&create_dwo_cu_data.dwo_unit, 0, |
10484 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
10485 | memset (&per_cu, 0, sizeof (per_cu)); |
10486 | per_cu.objfile = objfile; | |
10487 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
10488 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
10489 | per_cu.section = §ion; | |
c5ed0576 | 10490 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
10491 | |
10492 | init_cutu_and_read_dies_no_follow ( | |
10493 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
10494 | info_ptr += per_cu.length; | |
10495 | ||
10496 | // If the unit could not be parsed, skip it. | |
10497 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
10498 | continue; | |
3019eac3 | 10499 | |
33c5cd75 DB |
10500 | if (cus_htab == NULL) |
10501 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 10502 | |
33c5cd75 DB |
10503 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
10504 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
10505 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
10506 | gdb_assert (slot != NULL); | |
10507 | if (*slot != NULL) | |
19c3d4c9 | 10508 | { |
33c5cd75 DB |
10509 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
10510 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 10511 | |
33c5cd75 DB |
10512 | complaint (&symfile_complaints, |
10513 | _("debug cu entry at offset 0x%x is duplicate to" | |
10514 | " the entry at offset 0x%x, signature %s"), | |
10515 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
10516 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 10517 | } |
33c5cd75 | 10518 | *slot = (void *)dwo_unit; |
3019eac3 | 10519 | } |
3019eac3 DE |
10520 | } |
10521 | ||
80626a55 DE |
10522 | /* DWP file .debug_{cu,tu}_index section format: |
10523 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
10524 | ||
d2415c6c DE |
10525 | DWP Version 1: |
10526 | ||
80626a55 DE |
10527 | Both index sections have the same format, and serve to map a 64-bit |
10528 | signature to a set of section numbers. Each section begins with a header, | |
10529 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
10530 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
10531 | aligned at 8-byte boundaries in the file. | |
10532 | ||
d2415c6c DE |
10533 | The index section header consists of: |
10534 | ||
10535 | V, 32 bit version number | |
10536 | -, 32 bits unused | |
10537 | N, 32 bit number of compilation units or type units in the index | |
10538 | M, 32 bit number of slots in the hash table | |
80626a55 | 10539 | |
d2415c6c | 10540 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 10541 | |
d2415c6c DE |
10542 | The hash table begins at offset 16 in the section, and consists of an array |
10543 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
10544 | order of the application binary). Unused slots in the hash table are 0. | |
10545 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 10546 | |
d2415c6c DE |
10547 | The parallel table begins immediately after the hash table |
10548 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
10549 | array of 32-bit indexes (using the byte order of the application binary), | |
10550 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
10551 | table contains a 32-bit index into the pool of section numbers. For unused | |
10552 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 10553 | |
73869dc2 DE |
10554 | The pool of section numbers begins immediately following the hash table |
10555 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
10556 | section numbers consists of an array of 32-bit words (using the byte order | |
10557 | of the application binary). Each item in the array is indexed starting | |
10558 | from 0. The hash table entry provides the index of the first section | |
10559 | number in the set. Additional section numbers in the set follow, and the | |
10560 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
10561 | ||
10562 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10563 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10564 | be the second entry. Other members of the set may follow in any order. | |
10565 | ||
10566 | --- | |
10567 | ||
10568 | DWP Version 2: | |
10569 | ||
10570 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
10571 | and the entries in the index tables are now offsets into these sections. | |
10572 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10573 | section. | |
10574 | ||
10575 | Index Section Contents: | |
10576 | Header | |
10577 | Hash Table of Signatures dwp_hash_table.hash_table | |
10578 | Parallel Table of Indices dwp_hash_table.unit_table | |
10579 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
10580 | Table of Section Sizes dwp_hash_table.v2.sizes | |
10581 | ||
10582 | The index section header consists of: | |
10583 | ||
10584 | V, 32 bit version number | |
10585 | L, 32 bit number of columns in the table of section offsets | |
10586 | N, 32 bit number of compilation units or type units in the index | |
10587 | M, 32 bit number of slots in the hash table | |
10588 | ||
10589 | Numbers are recorded using the byte order of the application binary. | |
10590 | ||
10591 | The hash table has the same format as version 1. | |
10592 | The parallel table of indices has the same format as version 1, | |
10593 | except that the entries are origin-1 indices into the table of sections | |
10594 | offsets and the table of section sizes. | |
10595 | ||
10596 | The table of offsets begins immediately following the parallel table | |
10597 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10598 | a two-dimensional array of 32-bit words (using the byte order of the | |
10599 | application binary), with L columns and N+1 rows, in row-major order. | |
10600 | Each row in the array is indexed starting from 0. The first row provides | |
10601 | a key to the remaining rows: each column in this row provides an identifier | |
10602 | for a debug section, and the offsets in the same column of subsequent rows | |
10603 | refer to that section. The section identifiers are: | |
10604 | ||
10605 | DW_SECT_INFO 1 .debug_info.dwo | |
10606 | DW_SECT_TYPES 2 .debug_types.dwo | |
10607 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10608 | DW_SECT_LINE 4 .debug_line.dwo | |
10609 | DW_SECT_LOC 5 .debug_loc.dwo | |
10610 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10611 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10612 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10613 | ||
10614 | The offsets provided by the CU and TU index sections are the base offsets | |
10615 | for the contributions made by each CU or TU to the corresponding section | |
10616 | in the package file. Each CU and TU header contains an abbrev_offset | |
10617 | field, used to find the abbreviations table for that CU or TU within the | |
10618 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10619 | be interpreted as relative to the base offset given in the index section. | |
10620 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10621 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10622 | and offsets into other debug sections obtained from DWARF attributes should | |
10623 | also be interpreted as relative to the corresponding base offset. | |
10624 | ||
10625 | The table of sizes begins immediately following the table of offsets. | |
10626 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10627 | with L columns and N rows, in row-major order. Each row in the array is | |
10628 | indexed starting from 1 (row 0 is shared by the two tables). | |
10629 | ||
10630 | --- | |
10631 | ||
10632 | Hash table lookup is handled the same in version 1 and 2: | |
10633 | ||
10634 | We assume that N and M will not exceed 2^32 - 1. | |
10635 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10636 | ||
d2415c6c DE |
10637 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10638 | in the hash table is located as follows: | |
80626a55 | 10639 | |
d2415c6c DE |
10640 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10641 | the low-order k bits all set to 1. | |
80626a55 | 10642 | |
d2415c6c | 10643 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10644 | |
d2415c6c DE |
10645 | 3) If the hash table entry at index H matches the signature, use that |
10646 | entry. If the hash table entry at index H is unused (all zeroes), | |
10647 | terminate the search: the signature is not present in the table. | |
80626a55 | 10648 | |
d2415c6c | 10649 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10650 | |
d2415c6c | 10651 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10652 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10653 | |
10654 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10655 | .debug_{info,types}.dwo in DWP_FILE. | |
10656 | Returns NULL if there isn't one. | |
10657 | Note: This function processes DWP files only, not DWO files. */ | |
10658 | ||
10659 | static struct dwp_hash_table * | |
10660 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10661 | { | |
10662 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10663 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10664 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10665 | struct dwarf2_section_info *index; |
73869dc2 | 10666 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10667 | struct dwp_hash_table *htab; |
10668 | ||
10669 | if (is_debug_types) | |
10670 | index = &dwp_file->sections.tu_index; | |
10671 | else | |
10672 | index = &dwp_file->sections.cu_index; | |
10673 | ||
10674 | if (dwarf2_section_empty_p (index)) | |
10675 | return NULL; | |
10676 | dwarf2_read_section (objfile, index); | |
10677 | ||
10678 | index_ptr = index->buffer; | |
10679 | index_end = index_ptr + index->size; | |
10680 | ||
10681 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10682 | index_ptr += 4; |
10683 | if (version == 2) | |
10684 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10685 | else | |
10686 | nr_columns = 0; | |
10687 | index_ptr += 4; | |
80626a55 DE |
10688 | nr_units = read_4_bytes (dbfd, index_ptr); |
10689 | index_ptr += 4; | |
10690 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10691 | index_ptr += 4; | |
10692 | ||
73869dc2 | 10693 | if (version != 1 && version != 2) |
80626a55 | 10694 | { |
21aa081e | 10695 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10696 | " [in module %s]"), |
21aa081e | 10697 | pulongest (version), dwp_file->name); |
80626a55 DE |
10698 | } |
10699 | if (nr_slots != (nr_slots & -nr_slots)) | |
10700 | { | |
21aa081e | 10701 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10702 | " is not power of 2 [in module %s]"), |
21aa081e | 10703 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10704 | } |
10705 | ||
10706 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10707 | htab->version = version; |
10708 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10709 | htab->nr_units = nr_units; |
10710 | htab->nr_slots = nr_slots; | |
10711 | htab->hash_table = index_ptr; | |
10712 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10713 | |
10714 | /* Exit early if the table is empty. */ | |
10715 | if (nr_slots == 0 || nr_units == 0 | |
10716 | || (version == 2 && nr_columns == 0)) | |
10717 | { | |
10718 | /* All must be zero. */ | |
10719 | if (nr_slots != 0 || nr_units != 0 | |
10720 | || (version == 2 && nr_columns != 0)) | |
10721 | { | |
10722 | complaint (&symfile_complaints, | |
10723 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
10724 | " all zero [in modules %s]"), | |
10725 | dwp_file->name); | |
10726 | } | |
10727 | return htab; | |
10728 | } | |
10729 | ||
10730 | if (version == 1) | |
10731 | { | |
10732 | htab->section_pool.v1.indices = | |
10733 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10734 | /* It's harder to decide whether the section is too small in v1. | |
10735 | V1 is deprecated anyway so we punt. */ | |
10736 | } | |
10737 | else | |
10738 | { | |
10739 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10740 | int *ids = htab->section_pool.v2.section_ids; | |
10741 | /* Reverse map for error checking. */ | |
10742 | int ids_seen[DW_SECT_MAX + 1]; | |
10743 | int i; | |
10744 | ||
10745 | if (nr_columns < 2) | |
10746 | { | |
10747 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
10748 | " in section table [in module %s]"), | |
10749 | dwp_file->name); | |
10750 | } | |
10751 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
10752 | { | |
10753 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
10754 | " in section table [in module %s]"), | |
10755 | dwp_file->name); | |
10756 | } | |
10757 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10758 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10759 | for (i = 0; i < nr_columns; ++i) | |
10760 | { | |
10761 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
10762 | ||
10763 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
10764 | { | |
10765 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
10766 | " in section table [in module %s]"), | |
10767 | id, dwp_file->name); | |
10768 | } | |
10769 | if (ids_seen[id] != -1) | |
10770 | { | |
10771 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
10772 | " id %d in section table [in module %s]"), | |
10773 | id, dwp_file->name); | |
10774 | } | |
10775 | ids_seen[id] = i; | |
10776 | ids[i] = id; | |
10777 | } | |
10778 | /* Must have exactly one info or types section. */ | |
10779 | if (((ids_seen[DW_SECT_INFO] != -1) | |
10780 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
10781 | != 1) | |
10782 | { | |
10783 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
10784 | " DWO info/types section [in module %s]"), | |
10785 | dwp_file->name); | |
10786 | } | |
10787 | /* Must have an abbrev section. */ | |
10788 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
10789 | { | |
10790 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
10791 | " section [in module %s]"), | |
10792 | dwp_file->name); | |
10793 | } | |
10794 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
10795 | htab->section_pool.v2.sizes = | |
10796 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
10797 | * nr_units * nr_columns); | |
10798 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
10799 | * nr_units * nr_columns)) | |
10800 | > index_end) | |
10801 | { | |
10802 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
10803 | " [in module %s]"), | |
10804 | dwp_file->name); | |
10805 | } | |
10806 | } | |
80626a55 DE |
10807 | |
10808 | return htab; | |
10809 | } | |
10810 | ||
10811 | /* Update SECTIONS with the data from SECTP. | |
10812 | ||
10813 | This function is like the other "locate" section routines that are | |
10814 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 10815 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
10816 | |
10817 | The result is non-zero for success, or zero if an error was found. */ | |
10818 | ||
10819 | static int | |
73869dc2 DE |
10820 | locate_v1_virtual_dwo_sections (asection *sectp, |
10821 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
10822 | { |
10823 | const struct dwop_section_names *names = &dwop_section_names; | |
10824 | ||
10825 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10826 | { | |
10827 | /* There can be only one. */ | |
049412e3 | 10828 | if (sections->abbrev.s.section != NULL) |
80626a55 | 10829 | return 0; |
049412e3 | 10830 | sections->abbrev.s.section = sectp; |
80626a55 DE |
10831 | sections->abbrev.size = bfd_get_section_size (sectp); |
10832 | } | |
10833 | else if (section_is_p (sectp->name, &names->info_dwo) | |
10834 | || section_is_p (sectp->name, &names->types_dwo)) | |
10835 | { | |
10836 | /* There can be only one. */ | |
049412e3 | 10837 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 10838 | return 0; |
049412e3 | 10839 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
10840 | sections->info_or_types.size = bfd_get_section_size (sectp); |
10841 | } | |
10842 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10843 | { | |
10844 | /* There can be only one. */ | |
049412e3 | 10845 | if (sections->line.s.section != NULL) |
80626a55 | 10846 | return 0; |
049412e3 | 10847 | sections->line.s.section = sectp; |
80626a55 DE |
10848 | sections->line.size = bfd_get_section_size (sectp); |
10849 | } | |
10850 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10851 | { | |
10852 | /* There can be only one. */ | |
049412e3 | 10853 | if (sections->loc.s.section != NULL) |
80626a55 | 10854 | return 0; |
049412e3 | 10855 | sections->loc.s.section = sectp; |
80626a55 DE |
10856 | sections->loc.size = bfd_get_section_size (sectp); |
10857 | } | |
10858 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10859 | { | |
10860 | /* There can be only one. */ | |
049412e3 | 10861 | if (sections->macinfo.s.section != NULL) |
80626a55 | 10862 | return 0; |
049412e3 | 10863 | sections->macinfo.s.section = sectp; |
80626a55 DE |
10864 | sections->macinfo.size = bfd_get_section_size (sectp); |
10865 | } | |
10866 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10867 | { | |
10868 | /* There can be only one. */ | |
049412e3 | 10869 | if (sections->macro.s.section != NULL) |
80626a55 | 10870 | return 0; |
049412e3 | 10871 | sections->macro.s.section = sectp; |
80626a55 DE |
10872 | sections->macro.size = bfd_get_section_size (sectp); |
10873 | } | |
10874 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10875 | { | |
10876 | /* There can be only one. */ | |
049412e3 | 10877 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 10878 | return 0; |
049412e3 | 10879 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
10880 | sections->str_offsets.size = bfd_get_section_size (sectp); |
10881 | } | |
10882 | else | |
10883 | { | |
10884 | /* No other kind of section is valid. */ | |
10885 | return 0; | |
10886 | } | |
10887 | ||
10888 | return 1; | |
10889 | } | |
10890 | ||
73869dc2 DE |
10891 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
10892 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10893 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10894 | This is for DWP version 1 files. */ | |
80626a55 DE |
10895 | |
10896 | static struct dwo_unit * | |
73869dc2 DE |
10897 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
10898 | uint32_t unit_index, | |
10899 | const char *comp_dir, | |
10900 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
10901 | { |
10902 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
10903 | const struct dwp_hash_table *dwp_htab = |
10904 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
10905 | bfd *dbfd = dwp_file->dbfd; |
10906 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10907 | struct dwo_file *dwo_file; | |
10908 | struct dwo_unit *dwo_unit; | |
73869dc2 | 10909 | struct virtual_v1_dwo_sections sections; |
80626a55 | 10910 | void **dwo_file_slot; |
80626a55 DE |
10911 | int i; |
10912 | ||
73869dc2 DE |
10913 | gdb_assert (dwp_file->version == 1); |
10914 | ||
b4f54984 | 10915 | if (dwarf_read_debug) |
80626a55 | 10916 | { |
73869dc2 | 10917 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10918 | kind, |
73869dc2 | 10919 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10920 | dwp_file->name); |
10921 | } | |
10922 | ||
19ac8c2e | 10923 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10924 | Put a limit on the number of sections we look for so that bad data |
10925 | doesn't cause us to loop forever. */ | |
10926 | ||
73869dc2 | 10927 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10928 | (1 /* .debug_info or .debug_types */ \ |
10929 | + 1 /* .debug_abbrev */ \ | |
10930 | + 1 /* .debug_line */ \ | |
10931 | + 1 /* .debug_loc */ \ | |
10932 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10933 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10934 | + 1 /* trailing zero */) |
10935 | ||
10936 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 10937 | |
73869dc2 | 10938 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10939 | { |
10940 | asection *sectp; | |
10941 | uint32_t section_nr = | |
10942 | read_4_bytes (dbfd, | |
73869dc2 DE |
10943 | dwp_htab->section_pool.v1.indices |
10944 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10945 | |
10946 | if (section_nr == 0) | |
10947 | break; | |
10948 | if (section_nr >= dwp_file->num_sections) | |
10949 | { | |
10950 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10951 | " [in module %s]"), | |
10952 | dwp_file->name); | |
10953 | } | |
10954 | ||
10955 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10956 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10957 | { |
10958 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10959 | " [in module %s]"), | |
10960 | dwp_file->name); | |
10961 | } | |
10962 | } | |
10963 | ||
10964 | if (i < 2 | |
a32a8923 DE |
10965 | || dwarf2_section_empty_p (§ions.info_or_types) |
10966 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10967 | { |
10968 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10969 | " [in module %s]"), | |
10970 | dwp_file->name); | |
10971 | } | |
73869dc2 | 10972 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10973 | { |
10974 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10975 | " [in module %s]"), | |
10976 | dwp_file->name); | |
10977 | } | |
10978 | ||
10979 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10980 | have dwo_unit "live" in that. At least for now. | |
10981 | ||
10982 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10983 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10984 | file, we can combine them back into a virtual DWO file to save space |
10985 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10986 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10987 | ||
791afaa2 TT |
10988 | std::string virtual_dwo_name = |
10989 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
10990 | get_section_id (§ions.abbrev), | |
10991 | get_section_id (§ions.line), | |
10992 | get_section_id (§ions.loc), | |
10993 | get_section_id (§ions.str_offsets)); | |
80626a55 | 10994 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 10995 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
80626a55 DE |
10996 | /* Create one if necessary. */ |
10997 | if (*dwo_file_slot == NULL) | |
10998 | { | |
b4f54984 | 10999 | if (dwarf_read_debug) |
80626a55 DE |
11000 | { |
11001 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11002 | virtual_dwo_name.c_str ()); |
80626a55 DE |
11003 | } |
11004 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11005 | dwo_file->dwo_name |
11006 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11007 | virtual_dwo_name.c_str (), |
11008 | virtual_dwo_name.size ()); | |
0ac5b59e | 11009 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11010 | dwo_file->sections.abbrev = sections.abbrev; |
11011 | dwo_file->sections.line = sections.line; | |
11012 | dwo_file->sections.loc = sections.loc; | |
11013 | dwo_file->sections.macinfo = sections.macinfo; | |
11014 | dwo_file->sections.macro = sections.macro; | |
11015 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11016 | /* The "str" section is global to the entire DWP file. */ | |
11017 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11018 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11019 | there's no need to record it in dwo_file. |
11020 | Also, we can't simply record type sections in dwo_file because | |
11021 | we record a pointer into the vector in dwo_unit. As we collect more | |
11022 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11023 | for it, invalidating all copies of pointers into the previous |
11024 | contents. */ | |
80626a55 DE |
11025 | *dwo_file_slot = dwo_file; |
11026 | } | |
11027 | else | |
11028 | { | |
b4f54984 | 11029 | if (dwarf_read_debug) |
80626a55 DE |
11030 | { |
11031 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11032 | virtual_dwo_name.c_str ()); |
80626a55 | 11033 | } |
9a3c8263 | 11034 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11035 | } |
80626a55 DE |
11036 | |
11037 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11038 | dwo_unit->dwo_file = dwo_file; | |
11039 | dwo_unit->signature = signature; | |
8d749320 SM |
11040 | dwo_unit->section = |
11041 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11042 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11043 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11044 | |
11045 | return dwo_unit; | |
11046 | } | |
11047 | ||
73869dc2 DE |
11048 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11049 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11050 | piece within that section used by a TU/CU, return a virtual section | |
11051 | of just that piece. */ | |
11052 | ||
11053 | static struct dwarf2_section_info | |
11054 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
11055 | bfd_size_type offset, bfd_size_type size) | |
11056 | { | |
11057 | struct dwarf2_section_info result; | |
11058 | asection *sectp; | |
11059 | ||
11060 | gdb_assert (section != NULL); | |
11061 | gdb_assert (!section->is_virtual); | |
11062 | ||
11063 | memset (&result, 0, sizeof (result)); | |
11064 | result.s.containing_section = section; | |
11065 | result.is_virtual = 1; | |
11066 | ||
11067 | if (size == 0) | |
11068 | return result; | |
11069 | ||
11070 | sectp = get_section_bfd_section (section); | |
11071 | ||
11072 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11073 | bounds of the real section. This is a pretty-rare event, so just | |
11074 | flag an error (easier) instead of a warning and trying to cope. */ | |
11075 | if (sectp == NULL | |
11076 | || offset + size > bfd_get_section_size (sectp)) | |
11077 | { | |
11078 | bfd *abfd = sectp->owner; | |
11079 | ||
11080 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
11081 | " in section %s [in module %s]"), | |
11082 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
11083 | objfile_name (dwarf2_per_objfile->objfile)); | |
11084 | } | |
11085 | ||
11086 | result.virtual_offset = offset; | |
11087 | result.size = size; | |
11088 | return result; | |
11089 | } | |
11090 | ||
11091 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11092 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11093 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11094 | This is for DWP version 2 files. */ | |
11095 | ||
11096 | static struct dwo_unit * | |
11097 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
11098 | uint32_t unit_index, | |
11099 | const char *comp_dir, | |
11100 | ULONGEST signature, int is_debug_types) | |
11101 | { | |
11102 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11103 | const struct dwp_hash_table *dwp_htab = | |
11104 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11105 | bfd *dbfd = dwp_file->dbfd; | |
11106 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11107 | struct dwo_file *dwo_file; | |
11108 | struct dwo_unit *dwo_unit; | |
11109 | struct virtual_v2_dwo_sections sections; | |
11110 | void **dwo_file_slot; | |
73869dc2 DE |
11111 | int i; |
11112 | ||
11113 | gdb_assert (dwp_file->version == 2); | |
11114 | ||
b4f54984 | 11115 | if (dwarf_read_debug) |
73869dc2 DE |
11116 | { |
11117 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11118 | kind, | |
11119 | pulongest (unit_index), hex_string (signature), | |
11120 | dwp_file->name); | |
11121 | } | |
11122 | ||
11123 | /* Fetch the section offsets of this DWO unit. */ | |
11124 | ||
11125 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11126 | |
11127 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11128 | { | |
11129 | uint32_t offset = read_4_bytes (dbfd, | |
11130 | dwp_htab->section_pool.v2.offsets | |
11131 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11132 | + i) | |
11133 | * sizeof (uint32_t))); | |
11134 | uint32_t size = read_4_bytes (dbfd, | |
11135 | dwp_htab->section_pool.v2.sizes | |
11136 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11137 | + i) | |
11138 | * sizeof (uint32_t))); | |
11139 | ||
11140 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11141 | { | |
11142 | case DW_SECT_INFO: | |
11143 | case DW_SECT_TYPES: | |
11144 | sections.info_or_types_offset = offset; | |
11145 | sections.info_or_types_size = size; | |
11146 | break; | |
11147 | case DW_SECT_ABBREV: | |
11148 | sections.abbrev_offset = offset; | |
11149 | sections.abbrev_size = size; | |
11150 | break; | |
11151 | case DW_SECT_LINE: | |
11152 | sections.line_offset = offset; | |
11153 | sections.line_size = size; | |
11154 | break; | |
11155 | case DW_SECT_LOC: | |
11156 | sections.loc_offset = offset; | |
11157 | sections.loc_size = size; | |
11158 | break; | |
11159 | case DW_SECT_STR_OFFSETS: | |
11160 | sections.str_offsets_offset = offset; | |
11161 | sections.str_offsets_size = size; | |
11162 | break; | |
11163 | case DW_SECT_MACINFO: | |
11164 | sections.macinfo_offset = offset; | |
11165 | sections.macinfo_size = size; | |
11166 | break; | |
11167 | case DW_SECT_MACRO: | |
11168 | sections.macro_offset = offset; | |
11169 | sections.macro_size = size; | |
11170 | break; | |
11171 | } | |
11172 | } | |
11173 | ||
11174 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11175 | have dwo_unit "live" in that. At least for now. | |
11176 | ||
11177 | The DWP file can be made up of a random collection of CUs and TUs. | |
11178 | However, for each CU + set of TUs that came from the same original DWO | |
11179 | file, we can combine them back into a virtual DWO file to save space | |
11180 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11181 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11182 | ||
791afaa2 TT |
11183 | std::string virtual_dwo_name = |
11184 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11185 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11186 | (long) (sections.line_size ? sections.line_offset : 0), | |
11187 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11188 | (long) (sections.str_offsets_size | |
11189 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11190 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 11191 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
73869dc2 DE |
11192 | /* Create one if necessary. */ |
11193 | if (*dwo_file_slot == NULL) | |
11194 | { | |
b4f54984 | 11195 | if (dwarf_read_debug) |
73869dc2 DE |
11196 | { |
11197 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11198 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
11199 | } |
11200 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
11201 | dwo_file->dwo_name |
11202 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
11203 | virtual_dwo_name.c_str (), |
11204 | virtual_dwo_name.size ()); | |
73869dc2 DE |
11205 | dwo_file->comp_dir = comp_dir; |
11206 | dwo_file->sections.abbrev = | |
11207 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
11208 | sections.abbrev_offset, sections.abbrev_size); | |
11209 | dwo_file->sections.line = | |
11210 | create_dwp_v2_section (&dwp_file->sections.line, | |
11211 | sections.line_offset, sections.line_size); | |
11212 | dwo_file->sections.loc = | |
11213 | create_dwp_v2_section (&dwp_file->sections.loc, | |
11214 | sections.loc_offset, sections.loc_size); | |
11215 | dwo_file->sections.macinfo = | |
11216 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
11217 | sections.macinfo_offset, sections.macinfo_size); | |
11218 | dwo_file->sections.macro = | |
11219 | create_dwp_v2_section (&dwp_file->sections.macro, | |
11220 | sections.macro_offset, sections.macro_size); | |
11221 | dwo_file->sections.str_offsets = | |
11222 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
11223 | sections.str_offsets_offset, | |
11224 | sections.str_offsets_size); | |
11225 | /* The "str" section is global to the entire DWP file. */ | |
11226 | dwo_file->sections.str = dwp_file->sections.str; | |
11227 | /* The info or types section is assigned below to dwo_unit, | |
11228 | there's no need to record it in dwo_file. | |
11229 | Also, we can't simply record type sections in dwo_file because | |
11230 | we record a pointer into the vector in dwo_unit. As we collect more | |
11231 | types we'll grow the vector and eventually have to reallocate space | |
11232 | for it, invalidating all copies of pointers into the previous | |
11233 | contents. */ | |
11234 | *dwo_file_slot = dwo_file; | |
11235 | } | |
11236 | else | |
11237 | { | |
b4f54984 | 11238 | if (dwarf_read_debug) |
73869dc2 DE |
11239 | { |
11240 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11241 | virtual_dwo_name.c_str ()); |
73869dc2 | 11242 | } |
9a3c8263 | 11243 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11244 | } |
73869dc2 DE |
11245 | |
11246 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11247 | dwo_unit->dwo_file = dwo_file; | |
11248 | dwo_unit->signature = signature; | |
8d749320 SM |
11249 | dwo_unit->section = |
11250 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
11251 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
11252 | ? &dwp_file->sections.types | |
11253 | : &dwp_file->sections.info, | |
11254 | sections.info_or_types_offset, | |
11255 | sections.info_or_types_size); | |
11256 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11257 | ||
11258 | return dwo_unit; | |
11259 | } | |
11260 | ||
57d63ce2 DE |
11261 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11262 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11263 | |
11264 | static struct dwo_unit * | |
57d63ce2 DE |
11265 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
11266 | ULONGEST signature, int is_debug_types) | |
80626a55 | 11267 | { |
57d63ce2 DE |
11268 | const struct dwp_hash_table *dwp_htab = |
11269 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 11270 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 11271 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11272 | uint32_t hash = signature & mask; |
11273 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11274 | unsigned int i; | |
11275 | void **slot; | |
870f88f7 | 11276 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11277 | |
11278 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11279 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
11280 | slot = htab_find_slot (is_debug_types |
11281 | ? dwp_file->loaded_tus | |
11282 | : dwp_file->loaded_cus, | |
11283 | &find_dwo_cu, INSERT); | |
80626a55 DE |
11284 | |
11285 | if (*slot != NULL) | |
9a3c8263 | 11286 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11287 | |
11288 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11289 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11290 | { |
11291 | ULONGEST signature_in_table; | |
11292 | ||
11293 | signature_in_table = | |
57d63ce2 | 11294 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11295 | if (signature_in_table == signature) |
11296 | { | |
57d63ce2 DE |
11297 | uint32_t unit_index = |
11298 | read_4_bytes (dbfd, | |
11299 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11300 | |
73869dc2 DE |
11301 | if (dwp_file->version == 1) |
11302 | { | |
11303 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
11304 | comp_dir, signature, | |
11305 | is_debug_types); | |
11306 | } | |
11307 | else | |
11308 | { | |
11309 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
11310 | comp_dir, signature, | |
11311 | is_debug_types); | |
11312 | } | |
9a3c8263 | 11313 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11314 | } |
11315 | if (signature_in_table == 0) | |
11316 | return NULL; | |
11317 | hash = (hash + hash2) & mask; | |
11318 | } | |
11319 | ||
11320 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11321 | " [in module %s]"), | |
11322 | dwp_file->name); | |
11323 | } | |
11324 | ||
ab5088bf | 11325 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11326 | Open the file specified by FILE_NAME and hand it off to BFD for |
11327 | preliminary analysis. Return a newly initialized bfd *, which | |
11328 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 11329 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
11330 | SEARCH_CWD is true if the current directory is to be searched. |
11331 | It will be searched before debug-file-directory. | |
13aaf454 DE |
11332 | If successful, the file is added to the bfd include table of the |
11333 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 11334 | If unable to find/open the file, return NULL. |
3019eac3 DE |
11335 | NOTE: This function is derived from symfile_bfd_open. */ |
11336 | ||
192b62ce | 11337 | static gdb_bfd_ref_ptr |
6ac97d4c | 11338 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 11339 | { |
80626a55 | 11340 | int desc, flags; |
3019eac3 | 11341 | char *absolute_name; |
9c02c129 DE |
11342 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
11343 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
11344 | to debug_file_directory. */ | |
11345 | char *search_path; | |
11346 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
11347 | ||
6ac97d4c DE |
11348 | if (search_cwd) |
11349 | { | |
11350 | if (*debug_file_directory != '\0') | |
11351 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 11352 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
11353 | else |
11354 | search_path = xstrdup ("."); | |
11355 | } | |
9c02c129 | 11356 | else |
6ac97d4c | 11357 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 11358 | |
492c0ab7 | 11359 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
11360 | if (is_dwp) |
11361 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 11362 | desc = openp (search_path, flags, file_name, |
3019eac3 | 11363 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 11364 | xfree (search_path); |
3019eac3 DE |
11365 | if (desc < 0) |
11366 | return NULL; | |
11367 | ||
192b62ce | 11368 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 11369 | xfree (absolute_name); |
9c02c129 DE |
11370 | if (sym_bfd == NULL) |
11371 | return NULL; | |
192b62ce | 11372 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 11373 | |
192b62ce TT |
11374 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
11375 | return NULL; | |
3019eac3 | 11376 | |
13aaf454 DE |
11377 | /* Success. Record the bfd as having been included by the objfile's bfd. |
11378 | This is important because things like demangled_names_hash lives in the | |
11379 | objfile's per_bfd space and may have references to things like symbol | |
11380 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 11381 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 11382 | |
3019eac3 DE |
11383 | return sym_bfd; |
11384 | } | |
11385 | ||
ab5088bf | 11386 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
11387 | COMP_DIR is the DW_AT_comp_dir attribute. |
11388 | The result is the bfd handle of the file. | |
11389 | If there is a problem finding or opening the file, return NULL. | |
11390 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11391 | same as symfile_bfd_open. */ | |
11392 | ||
192b62ce | 11393 | static gdb_bfd_ref_ptr |
ab5088bf | 11394 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 11395 | { |
80626a55 | 11396 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 11397 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
11398 | |
11399 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
11400 | ||
11401 | if (comp_dir != NULL) | |
11402 | { | |
b36cec19 PA |
11403 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
11404 | file_name, (char *) NULL); | |
3019eac3 DE |
11405 | |
11406 | /* NOTE: If comp_dir is a relative path, this will also try the | |
11407 | search path, which seems useful. */ | |
192b62ce TT |
11408 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
11409 | 1 /*search_cwd*/)); | |
3019eac3 DE |
11410 | xfree (path_to_try); |
11411 | if (abfd != NULL) | |
11412 | return abfd; | |
11413 | } | |
11414 | ||
11415 | /* That didn't work, try debug-file-directory, which, despite its name, | |
11416 | is a list of paths. */ | |
11417 | ||
11418 | if (*debug_file_directory == '\0') | |
11419 | return NULL; | |
11420 | ||
6ac97d4c | 11421 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
11422 | } |
11423 | ||
80626a55 DE |
11424 | /* This function is mapped across the sections and remembers the offset and |
11425 | size of each of the DWO debugging sections we are interested in. */ | |
11426 | ||
11427 | static void | |
11428 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
11429 | { | |
9a3c8263 | 11430 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
11431 | const struct dwop_section_names *names = &dwop_section_names; |
11432 | ||
11433 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11434 | { | |
049412e3 | 11435 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
11436 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
11437 | } | |
11438 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11439 | { | |
049412e3 | 11440 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
11441 | dwo_sections->info.size = bfd_get_section_size (sectp); |
11442 | } | |
11443 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11444 | { | |
049412e3 | 11445 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
11446 | dwo_sections->line.size = bfd_get_section_size (sectp); |
11447 | } | |
11448 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11449 | { | |
049412e3 | 11450 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
11451 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
11452 | } | |
11453 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11454 | { | |
049412e3 | 11455 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
11456 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
11457 | } | |
11458 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11459 | { | |
049412e3 | 11460 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
11461 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
11462 | } | |
11463 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
11464 | { | |
049412e3 | 11465 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
11466 | dwo_sections->str.size = bfd_get_section_size (sectp); |
11467 | } | |
11468 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11469 | { | |
049412e3 | 11470 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
11471 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
11472 | } | |
11473 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11474 | { | |
11475 | struct dwarf2_section_info type_section; | |
11476 | ||
11477 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 11478 | type_section.s.section = sectp; |
80626a55 DE |
11479 | type_section.size = bfd_get_section_size (sectp); |
11480 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
11481 | &type_section); | |
11482 | } | |
11483 | } | |
11484 | ||
ab5088bf | 11485 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 11486 | by PER_CU. This is for the non-DWP case. |
80626a55 | 11487 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
11488 | |
11489 | static struct dwo_file * | |
0ac5b59e DE |
11490 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
11491 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
11492 | { |
11493 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 11494 | struct dwo_file *dwo_file; |
3019eac3 DE |
11495 | struct cleanup *cleanups; |
11496 | ||
192b62ce | 11497 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
11498 | if (dbfd == NULL) |
11499 | { | |
b4f54984 | 11500 | if (dwarf_read_debug) |
80626a55 DE |
11501 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
11502 | return NULL; | |
11503 | } | |
11504 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
11505 | dwo_file->dwo_name = dwo_name; |
11506 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 11507 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
11508 | |
11509 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
11510 | ||
192b62ce TT |
11511 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
11512 | &dwo_file->sections); | |
3019eac3 | 11513 | |
33c5cd75 | 11514 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 11515 | |
78d4d2c5 JK |
11516 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
11517 | dwo_file->tus); | |
3019eac3 DE |
11518 | |
11519 | discard_cleanups (cleanups); | |
11520 | ||
b4f54984 | 11521 | if (dwarf_read_debug) |
80626a55 DE |
11522 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
11523 | ||
3019eac3 DE |
11524 | return dwo_file; |
11525 | } | |
11526 | ||
80626a55 | 11527 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
11528 | size of each of the DWP debugging sections common to version 1 and 2 that |
11529 | we are interested in. */ | |
3019eac3 | 11530 | |
80626a55 | 11531 | static void |
73869dc2 DE |
11532 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
11533 | void *dwp_file_ptr) | |
3019eac3 | 11534 | { |
9a3c8263 | 11535 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
11536 | const struct dwop_section_names *names = &dwop_section_names; |
11537 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 11538 | |
80626a55 | 11539 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 11540 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
11541 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
11542 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 11543 | |
80626a55 DE |
11544 | /* Look for specific sections that we need. */ |
11545 | if (section_is_p (sectp->name, &names->str_dwo)) | |
11546 | { | |
049412e3 | 11547 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
11548 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
11549 | } | |
11550 | else if (section_is_p (sectp->name, &names->cu_index)) | |
11551 | { | |
049412e3 | 11552 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
11553 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
11554 | } | |
11555 | else if (section_is_p (sectp->name, &names->tu_index)) | |
11556 | { | |
049412e3 | 11557 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
11558 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
11559 | } | |
11560 | } | |
3019eac3 | 11561 | |
73869dc2 DE |
11562 | /* This function is mapped across the sections and remembers the offset and |
11563 | size of each of the DWP version 2 debugging sections that we are interested | |
11564 | in. This is split into a separate function because we don't know if we | |
11565 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
11566 | ||
11567 | static void | |
11568 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
11569 | { | |
9a3c8263 | 11570 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
11571 | const struct dwop_section_names *names = &dwop_section_names; |
11572 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
11573 | ||
11574 | /* Record the ELF section number for later lookup: this is what the | |
11575 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
11576 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
11577 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
11578 | ||
11579 | /* Look for specific sections that we need. */ | |
11580 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11581 | { | |
049412e3 | 11582 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
11583 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
11584 | } | |
11585 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11586 | { | |
049412e3 | 11587 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
11588 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
11589 | } | |
11590 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11591 | { | |
049412e3 | 11592 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11593 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11594 | } | |
11595 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11596 | { | |
049412e3 | 11597 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11598 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11599 | } | |
11600 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11601 | { | |
049412e3 | 11602 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11603 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11604 | } | |
11605 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11606 | { | |
049412e3 | 11607 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11608 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11609 | } | |
11610 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11611 | { | |
049412e3 | 11612 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11613 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11614 | } | |
11615 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11616 | { | |
049412e3 | 11617 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11618 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11619 | } | |
11620 | } | |
11621 | ||
80626a55 | 11622 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11623 | |
80626a55 DE |
11624 | static hashval_t |
11625 | hash_dwp_loaded_cutus (const void *item) | |
11626 | { | |
9a3c8263 | 11627 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11628 | |
80626a55 DE |
11629 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11630 | return dwo_unit->signature; | |
3019eac3 DE |
11631 | } |
11632 | ||
80626a55 | 11633 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11634 | |
80626a55 DE |
11635 | static int |
11636 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11637 | { |
9a3c8263 SM |
11638 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11639 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11640 | |
80626a55 DE |
11641 | return dua->signature == dub->signature; |
11642 | } | |
3019eac3 | 11643 | |
80626a55 | 11644 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11645 | |
80626a55 DE |
11646 | static htab_t |
11647 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11648 | { | |
11649 | return htab_create_alloc_ex (3, | |
11650 | hash_dwp_loaded_cutus, | |
11651 | eq_dwp_loaded_cutus, | |
11652 | NULL, | |
11653 | &objfile->objfile_obstack, | |
11654 | hashtab_obstack_allocate, | |
11655 | dummy_obstack_deallocate); | |
11656 | } | |
3019eac3 | 11657 | |
ab5088bf DE |
11658 | /* Try to open DWP file FILE_NAME. |
11659 | The result is the bfd handle of the file. | |
11660 | If there is a problem finding or opening the file, return NULL. | |
11661 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11662 | same as symfile_bfd_open. */ | |
11663 | ||
192b62ce | 11664 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11665 | open_dwp_file (const char *file_name) |
11666 | { | |
192b62ce TT |
11667 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11668 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11669 | if (abfd != NULL) |
11670 | return abfd; | |
11671 | ||
11672 | /* Work around upstream bug 15652. | |
11673 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11674 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11675 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11676 | of the executable's path may have discarded the needed info. | |
11677 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11678 | .gnu_debuglink, but that doesn't exist yet.] | |
11679 | Strip the directory from FILE_NAME and search again. */ | |
11680 | if (*debug_file_directory != '\0') | |
11681 | { | |
11682 | /* Don't implicitly search the current directory here. | |
11683 | If the user wants to search "." to handle this case, | |
11684 | it must be added to debug-file-directory. */ | |
11685 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11686 | 0 /*search_cwd*/); | |
11687 | } | |
11688 | ||
11689 | return NULL; | |
ab5088bf DE |
11690 | } |
11691 | ||
80626a55 DE |
11692 | /* Initialize the use of the DWP file for the current objfile. |
11693 | By convention the name of the DWP file is ${objfile}.dwp. | |
11694 | The result is NULL if it can't be found. */ | |
a766d390 | 11695 | |
80626a55 | 11696 | static struct dwp_file * |
ab5088bf | 11697 | open_and_init_dwp_file (void) |
80626a55 DE |
11698 | { |
11699 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11700 | struct dwp_file *dwp_file; | |
80626a55 | 11701 | |
82bf32bc JK |
11702 | /* Try to find first .dwp for the binary file before any symbolic links |
11703 | resolving. */ | |
6c447423 DE |
11704 | |
11705 | /* If the objfile is a debug file, find the name of the real binary | |
11706 | file and get the name of dwp file from there. */ | |
d721ba37 | 11707 | std::string dwp_name; |
6c447423 DE |
11708 | if (objfile->separate_debug_objfile_backlink != NULL) |
11709 | { | |
11710 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11711 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11712 | |
d721ba37 | 11713 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11714 | } |
11715 | else | |
d721ba37 PA |
11716 | dwp_name = objfile->original_name; |
11717 | ||
11718 | dwp_name += ".dwp"; | |
80626a55 | 11719 | |
d721ba37 | 11720 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
11721 | if (dbfd == NULL |
11722 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
11723 | { | |
11724 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
11725 | dwp_name = objfile_name (objfile); |
11726 | dwp_name += ".dwp"; | |
11727 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
11728 | } |
11729 | ||
80626a55 DE |
11730 | if (dbfd == NULL) |
11731 | { | |
b4f54984 | 11732 | if (dwarf_read_debug) |
d721ba37 | 11733 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 11734 | return NULL; |
3019eac3 | 11735 | } |
80626a55 | 11736 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
11737 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
11738 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 11739 | |
80626a55 | 11740 | /* +1: section 0 is unused */ |
192b62ce | 11741 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
11742 | dwp_file->elf_sections = |
11743 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
11744 | dwp_file->num_sections, asection *); | |
11745 | ||
192b62ce TT |
11746 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
11747 | dwp_file); | |
80626a55 DE |
11748 | |
11749 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
11750 | ||
11751 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
11752 | ||
73869dc2 | 11753 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
11754 | if (dwp_file->cus && dwp_file->tus |
11755 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
11756 | { |
11757 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 11758 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 11759 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
11760 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
11761 | " TU version %s [in DWP file %s]"), | |
11762 | pulongest (dwp_file->cus->version), | |
d721ba37 | 11763 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 11764 | } |
08302ed2 DE |
11765 | |
11766 | if (dwp_file->cus) | |
11767 | dwp_file->version = dwp_file->cus->version; | |
11768 | else if (dwp_file->tus) | |
11769 | dwp_file->version = dwp_file->tus->version; | |
11770 | else | |
11771 | dwp_file->version = 2; | |
73869dc2 DE |
11772 | |
11773 | if (dwp_file->version == 2) | |
192b62ce TT |
11774 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
11775 | dwp_file); | |
73869dc2 | 11776 | |
19ac8c2e DE |
11777 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
11778 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 11779 | |
b4f54984 | 11780 | if (dwarf_read_debug) |
80626a55 DE |
11781 | { |
11782 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
11783 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
11784 | " %s CUs, %s TUs\n", |
11785 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
11786 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
11787 | } |
11788 | ||
11789 | return dwp_file; | |
3019eac3 | 11790 | } |
c906108c | 11791 | |
ab5088bf DE |
11792 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
11793 | ||
11794 | static struct dwp_file * | |
11795 | get_dwp_file (void) | |
11796 | { | |
11797 | if (! dwarf2_per_objfile->dwp_checked) | |
11798 | { | |
11799 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
11800 | dwarf2_per_objfile->dwp_checked = 1; | |
11801 | } | |
11802 | return dwarf2_per_objfile->dwp_file; | |
11803 | } | |
11804 | ||
80626a55 DE |
11805 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
11806 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
11807 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 11808 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
11809 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
11810 | ||
11811 | This is called, for example, when wanting to read a variable with a | |
11812 | complex location. Therefore we don't want to do file i/o for every call. | |
11813 | Therefore we don't want to look for a DWO file on every call. | |
11814 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
11815 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
11816 | for a DWO file. | |
11817 | ||
1c658ad5 | 11818 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 11819 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 11820 | |
3019eac3 | 11821 | static struct dwo_unit * |
80626a55 DE |
11822 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
11823 | const char *dwo_name, const char *comp_dir, | |
11824 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
11825 | { |
11826 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
11827 | const char *kind = is_debug_types ? "TU" : "CU"; |
11828 | void **dwo_file_slot; | |
3019eac3 | 11829 | struct dwo_file *dwo_file; |
80626a55 | 11830 | struct dwp_file *dwp_file; |
cb1df416 | 11831 | |
6a506a2d DE |
11832 | /* First see if there's a DWP file. |
11833 | If we have a DWP file but didn't find the DWO inside it, don't | |
11834 | look for the original DWO file. It makes gdb behave differently | |
11835 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 11836 | |
ab5088bf | 11837 | dwp_file = get_dwp_file (); |
80626a55 | 11838 | if (dwp_file != NULL) |
cf2c3c16 | 11839 | { |
80626a55 DE |
11840 | const struct dwp_hash_table *dwp_htab = |
11841 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11842 | ||
11843 | if (dwp_htab != NULL) | |
11844 | { | |
11845 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
11846 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
11847 | signature, is_debug_types); | |
80626a55 DE |
11848 | |
11849 | if (dwo_cutu != NULL) | |
11850 | { | |
b4f54984 | 11851 | if (dwarf_read_debug) |
80626a55 DE |
11852 | { |
11853 | fprintf_unfiltered (gdb_stdlog, | |
11854 | "Virtual DWO %s %s found: @%s\n", | |
11855 | kind, hex_string (signature), | |
11856 | host_address_to_string (dwo_cutu)); | |
11857 | } | |
11858 | return dwo_cutu; | |
11859 | } | |
11860 | } | |
11861 | } | |
6a506a2d | 11862 | else |
80626a55 | 11863 | { |
6a506a2d | 11864 | /* No DWP file, look for the DWO file. */ |
80626a55 | 11865 | |
6a506a2d DE |
11866 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
11867 | if (*dwo_file_slot == NULL) | |
80626a55 | 11868 | { |
6a506a2d DE |
11869 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
11870 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 11871 | } |
6a506a2d | 11872 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 11873 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 11874 | |
6a506a2d | 11875 | if (dwo_file != NULL) |
19c3d4c9 | 11876 | { |
6a506a2d DE |
11877 | struct dwo_unit *dwo_cutu = NULL; |
11878 | ||
11879 | if (is_debug_types && dwo_file->tus) | |
11880 | { | |
11881 | struct dwo_unit find_dwo_cutu; | |
11882 | ||
11883 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11884 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11885 | dwo_cutu |
11886 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 11887 | } |
33c5cd75 | 11888 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 11889 | { |
33c5cd75 DB |
11890 | struct dwo_unit find_dwo_cutu; |
11891 | ||
11892 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11893 | find_dwo_cutu.signature = signature; | |
11894 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
11895 | &find_dwo_cutu); | |
6a506a2d DE |
11896 | } |
11897 | ||
11898 | if (dwo_cutu != NULL) | |
11899 | { | |
b4f54984 | 11900 | if (dwarf_read_debug) |
6a506a2d DE |
11901 | { |
11902 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11903 | kind, dwo_name, hex_string (signature), | |
11904 | host_address_to_string (dwo_cutu)); | |
11905 | } | |
11906 | return dwo_cutu; | |
80626a55 DE |
11907 | } |
11908 | } | |
2e276125 | 11909 | } |
9cdd5dbd | 11910 | |
80626a55 DE |
11911 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11912 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11913 | correctly to find the file. */ | |
11914 | ||
b4f54984 | 11915 | if (dwarf_read_debug) |
80626a55 DE |
11916 | { |
11917 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11918 | kind, dwo_name, hex_string (signature)); | |
11919 | } | |
3019eac3 | 11920 | |
6656a72d DE |
11921 | /* This is a warning and not a complaint because it can be caused by |
11922 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11923 | { |
11924 | /* Print the name of the DWP file if we looked there, helps the user | |
11925 | better diagnose the problem. */ | |
791afaa2 | 11926 | std::string dwp_text; |
43942612 DE |
11927 | |
11928 | if (dwp_file != NULL) | |
791afaa2 TT |
11929 | dwp_text = string_printf (" [in DWP file %s]", |
11930 | lbasename (dwp_file->name)); | |
43942612 DE |
11931 | |
11932 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11933 | " [in module %s]"), | |
11934 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 11935 | dwp_text.c_str (), |
43942612 | 11936 | this_unit->is_debug_types ? "TU" : "CU", |
9c541725 | 11937 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 11938 | } |
3019eac3 | 11939 | return NULL; |
5fb290d7 DJ |
11940 | } |
11941 | ||
80626a55 DE |
11942 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11943 | See lookup_dwo_cutu_unit for details. */ | |
11944 | ||
11945 | static struct dwo_unit * | |
11946 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11947 | const char *dwo_name, const char *comp_dir, | |
11948 | ULONGEST signature) | |
11949 | { | |
11950 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11951 | } | |
11952 | ||
11953 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11954 | See lookup_dwo_cutu_unit for details. */ | |
11955 | ||
11956 | static struct dwo_unit * | |
11957 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11958 | const char *dwo_name, const char *comp_dir) | |
11959 | { | |
11960 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11961 | } | |
11962 | ||
89e63ee4 DE |
11963 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11964 | ||
11965 | static int | |
11966 | queue_and_load_dwo_tu (void **slot, void *info) | |
11967 | { | |
11968 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11969 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11970 | ULONGEST signature = dwo_unit->signature; | |
11971 | struct signatured_type *sig_type = | |
11972 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11973 | ||
11974 | if (sig_type != NULL) | |
11975 | { | |
11976 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11977 | ||
11978 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11979 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11980 | while processing PER_CU. */ | |
11981 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11982 | load_full_type_unit (sig_cu); | |
11983 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11984 | } | |
11985 | ||
11986 | return 1; | |
11987 | } | |
11988 | ||
11989 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11990 | The DWO may have the only definition of the type, though it may not be | |
11991 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11992 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11993 | ||
11994 | static void | |
11995 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11996 | { | |
11997 | struct dwo_unit *dwo_unit; | |
11998 | struct dwo_file *dwo_file; | |
11999 | ||
12000 | gdb_assert (!per_cu->is_debug_types); | |
12001 | gdb_assert (get_dwp_file () == NULL); | |
12002 | gdb_assert (per_cu->cu != NULL); | |
12003 | ||
12004 | dwo_unit = per_cu->cu->dwo_unit; | |
12005 | gdb_assert (dwo_unit != NULL); | |
12006 | ||
12007 | dwo_file = dwo_unit->dwo_file; | |
12008 | if (dwo_file->tus != NULL) | |
12009 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
12010 | } | |
12011 | ||
3019eac3 DE |
12012 | /* Free all resources associated with DWO_FILE. |
12013 | Close the DWO file and munmap the sections. | |
12014 | All memory should be on the objfile obstack. */ | |
348e048f DE |
12015 | |
12016 | static void | |
3019eac3 | 12017 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 12018 | { |
348e048f | 12019 | |
5c6fa7ab | 12020 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 12021 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 12022 | |
3019eac3 DE |
12023 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
12024 | } | |
348e048f | 12025 | |
3019eac3 | 12026 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 12027 | |
3019eac3 DE |
12028 | static void |
12029 | free_dwo_file_cleanup (void *arg) | |
12030 | { | |
12031 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
12032 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 12033 | |
3019eac3 DE |
12034 | free_dwo_file (dwo_file, objfile); |
12035 | } | |
348e048f | 12036 | |
3019eac3 | 12037 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 12038 | |
3019eac3 DE |
12039 | static int |
12040 | free_dwo_file_from_slot (void **slot, void *info) | |
12041 | { | |
12042 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
12043 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 12044 | |
3019eac3 | 12045 | free_dwo_file (dwo_file, objfile); |
348e048f | 12046 | |
3019eac3 DE |
12047 | return 1; |
12048 | } | |
348e048f | 12049 | |
3019eac3 | 12050 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 12051 | |
3019eac3 DE |
12052 | static void |
12053 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
12054 | { | |
12055 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 12056 | } |
3019eac3 DE |
12057 | \f |
12058 | /* Read in various DIEs. */ | |
348e048f | 12059 | |
d389af10 | 12060 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12061 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12062 | already referenced by DW_AT_abstract_origin from the children of the | |
12063 | current DIE. */ | |
d389af10 JK |
12064 | |
12065 | static void | |
12066 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12067 | { | |
12068 | struct die_info *child_die; | |
791afaa2 | 12069 | sect_offset *offsetp; |
d389af10 JK |
12070 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12071 | struct die_info *origin_die; | |
12072 | /* Iterator of the ORIGIN_DIE children. */ | |
12073 | struct die_info *origin_child_die; | |
d389af10 | 12074 | struct attribute *attr; |
cd02d79d PA |
12075 | struct dwarf2_cu *origin_cu; |
12076 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12077 | |
12078 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12079 | if (!attr) | |
12080 | return; | |
12081 | ||
cd02d79d PA |
12082 | /* Note that following die references may follow to a die in a |
12083 | different cu. */ | |
12084 | ||
12085 | origin_cu = cu; | |
12086 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12087 | ||
12088 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12089 | symbols in. */ | |
12090 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12091 | origin_cu->list_in_scope = cu->list_in_scope; | |
12092 | ||
edb3359d DJ |
12093 | if (die->tag != origin_die->tag |
12094 | && !(die->tag == DW_TAG_inlined_subroutine | |
12095 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12096 | complaint (&symfile_complaints, |
12097 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
12098 | to_underlying (die->sect_off), |
12099 | to_underlying (origin_die->sect_off)); | |
d389af10 | 12100 | |
791afaa2 | 12101 | std::vector<sect_offset> offsets; |
d389af10 | 12102 | |
3ea89b92 PMR |
12103 | for (child_die = die->child; |
12104 | child_die && child_die->tag; | |
12105 | child_die = sibling_die (child_die)) | |
12106 | { | |
12107 | struct die_info *child_origin_die; | |
12108 | struct dwarf2_cu *child_origin_cu; | |
12109 | ||
12110 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12111 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12112 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12113 | present in the abstract instance but not referenced in the concrete | |
12114 | one. */ | |
216f72a1 JK |
12115 | if (child_die->tag == DW_TAG_call_site |
12116 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12117 | continue; |
12118 | ||
c38f313d DJ |
12119 | /* For each CHILD_DIE, find the corresponding child of |
12120 | ORIGIN_DIE. If there is more than one layer of | |
12121 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12122 | but GCC versions at least through 4.4 generate this (GCC PR | |
12123 | 40573). */ | |
3ea89b92 PMR |
12124 | child_origin_die = child_die; |
12125 | child_origin_cu = cu; | |
c38f313d DJ |
12126 | while (1) |
12127 | { | |
cd02d79d PA |
12128 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12129 | child_origin_cu); | |
c38f313d DJ |
12130 | if (attr == NULL) |
12131 | break; | |
cd02d79d PA |
12132 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12133 | &child_origin_cu); | |
c38f313d DJ |
12134 | } |
12135 | ||
d389af10 JK |
12136 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12137 | counterpart may exist. */ | |
c38f313d | 12138 | if (child_origin_die != child_die) |
d389af10 | 12139 | { |
edb3359d DJ |
12140 | if (child_die->tag != child_origin_die->tag |
12141 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12142 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
12143 | complaint (&symfile_complaints, |
12144 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12145 | "different tags"), |
12146 | to_underlying (child_die->sect_off), | |
12147 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
12148 | if (child_origin_die->parent != origin_die) |
12149 | complaint (&symfile_complaints, | |
12150 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
12151 | "different parents"), |
12152 | to_underlying (child_die->sect_off), | |
12153 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 12154 | else |
791afaa2 | 12155 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12156 | } |
d389af10 | 12157 | } |
791afaa2 TT |
12158 | std::sort (offsets.begin (), offsets.end ()); |
12159 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12160 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12161 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
12162 | complaint (&symfile_complaints, |
12163 | _("Multiple children of DIE 0x%x refer " | |
12164 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 12165 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 | 12166 | |
791afaa2 | 12167 | offsetp = offsets.data (); |
d389af10 JK |
12168 | origin_child_die = origin_die->child; |
12169 | while (origin_child_die && origin_child_die->tag) | |
12170 | { | |
12171 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12172 | while (offsetp < offsets_end |
9c541725 | 12173 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12174 | offsetp++; |
b64f50a1 | 12175 | if (offsetp >= offsets_end |
9c541725 | 12176 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12177 | { |
adde2bff DE |
12178 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12179 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12180 | This can happen with mutually referenced abstract_origins. | |
12181 | PR 16581. */ | |
12182 | if (!origin_child_die->in_process) | |
12183 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12184 | } |
12185 | origin_child_die = sibling_die (origin_child_die); | |
12186 | } | |
cd02d79d | 12187 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
12188 | } |
12189 | ||
c906108c | 12190 | static void |
e7c27a73 | 12191 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12192 | { |
e7c27a73 | 12193 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12194 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12195 | struct context_stack *newobj; |
c906108c SS |
12196 | CORE_ADDR lowpc; |
12197 | CORE_ADDR highpc; | |
12198 | struct die_info *child_die; | |
edb3359d | 12199 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12200 | const char *name; |
e142c38c | 12201 | CORE_ADDR baseaddr; |
801e3a5b | 12202 | struct block *block; |
edb3359d | 12203 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12204 | std::vector<struct symbol *> template_args; |
34eaf542 | 12205 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12206 | |
12207 | if (inlined_func) | |
12208 | { | |
12209 | /* If we do not have call site information, we can't show the | |
12210 | caller of this inlined function. That's too confusing, so | |
12211 | only use the scope for local variables. */ | |
12212 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12213 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12214 | if (call_line == NULL || call_file == NULL) | |
12215 | { | |
12216 | read_lexical_block_scope (die, cu); | |
12217 | return; | |
12218 | } | |
12219 | } | |
c906108c | 12220 | |
e142c38c DJ |
12221 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
12222 | ||
94af9270 | 12223 | name = dwarf2_name (die, cu); |
c906108c | 12224 | |
e8d05480 JB |
12225 | /* Ignore functions with missing or empty names. These are actually |
12226 | illegal according to the DWARF standard. */ | |
12227 | if (name == NULL) | |
12228 | { | |
12229 | complaint (&symfile_complaints, | |
b64f50a1 | 12230 | _("missing name for subprogram DIE at %d"), |
9c541725 | 12231 | to_underlying (die->sect_off)); |
e8d05480 JB |
12232 | return; |
12233 | } | |
12234 | ||
12235 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12236 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12237 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12238 | { |
ae4d0c03 PM |
12239 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12240 | if (!attr || !DW_UNSND (attr)) | |
12241 | complaint (&symfile_complaints, | |
3e43a32a MS |
12242 | _("cannot get low and high bounds " |
12243 | "for subprogram DIE at %d"), | |
9c541725 | 12244 | to_underlying (die->sect_off)); |
e8d05480 JB |
12245 | return; |
12246 | } | |
c906108c | 12247 | |
3e29f34a MR |
12248 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12249 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12250 | |
34eaf542 TT |
12251 | /* If we have any template arguments, then we must allocate a |
12252 | different sort of symbol. */ | |
12253 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12254 | { | |
12255 | if (child_die->tag == DW_TAG_template_type_param | |
12256 | || child_die->tag == DW_TAG_template_value_param) | |
12257 | { | |
e623cf5d | 12258 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
12259 | templ_func->base.is_cplus_template_function = 1; |
12260 | break; | |
12261 | } | |
12262 | } | |
12263 | ||
fe978cb0 PA |
12264 | newobj = push_context (0, lowpc); |
12265 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 12266 | (struct symbol *) templ_func); |
4c2df51b | 12267 | |
4cecd739 DJ |
12268 | /* If there is a location expression for DW_AT_frame_base, record |
12269 | it. */ | |
e142c38c | 12270 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 12271 | if (attr) |
fe978cb0 | 12272 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12273 | |
63e43d3a PMR |
12274 | /* If there is a location for the static link, record it. */ |
12275 | newobj->static_link = NULL; | |
12276 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
12277 | if (attr) | |
12278 | { | |
224c3ddb SM |
12279 | newobj->static_link |
12280 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
12281 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
12282 | } | |
12283 | ||
e142c38c | 12284 | cu->list_in_scope = &local_symbols; |
c906108c | 12285 | |
639d11d3 | 12286 | if (die->child != NULL) |
c906108c | 12287 | { |
639d11d3 | 12288 | child_die = die->child; |
c906108c SS |
12289 | while (child_die && child_die->tag) |
12290 | { | |
34eaf542 TT |
12291 | if (child_die->tag == DW_TAG_template_type_param |
12292 | || child_die->tag == DW_TAG_template_value_param) | |
12293 | { | |
12294 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12295 | ||
f1078f66 | 12296 | if (arg != NULL) |
2f4732b0 | 12297 | template_args.push_back (arg); |
34eaf542 TT |
12298 | } |
12299 | else | |
12300 | process_die (child_die, cu); | |
c906108c SS |
12301 | child_die = sibling_die (child_die); |
12302 | } | |
12303 | } | |
12304 | ||
d389af10 JK |
12305 | inherit_abstract_dies (die, cu); |
12306 | ||
4a811a97 UW |
12307 | /* If we have a DW_AT_specification, we might need to import using |
12308 | directives from the context of the specification DIE. See the | |
12309 | comment in determine_prefix. */ | |
12310 | if (cu->language == language_cplus | |
12311 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12312 | { | |
12313 | struct dwarf2_cu *spec_cu = cu; | |
12314 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12315 | ||
12316 | while (spec_die) | |
12317 | { | |
12318 | child_die = spec_die->child; | |
12319 | while (child_die && child_die->tag) | |
12320 | { | |
12321 | if (child_die->tag == DW_TAG_imported_module) | |
12322 | process_die (child_die, spec_cu); | |
12323 | child_die = sibling_die (child_die); | |
12324 | } | |
12325 | ||
12326 | /* In some cases, GCC generates specification DIEs that | |
12327 | themselves contain DW_AT_specification attributes. */ | |
12328 | spec_die = die_specification (spec_die, &spec_cu); | |
12329 | } | |
12330 | } | |
12331 | ||
fe978cb0 | 12332 | newobj = pop_context (); |
c906108c | 12333 | /* Make a block for the local symbols within. */ |
fe978cb0 | 12334 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 12335 | newobj->static_link, lowpc, highpc); |
801e3a5b | 12336 | |
df8a16a1 | 12337 | /* For C++, set the block's scope. */ |
45280282 IB |
12338 | if ((cu->language == language_cplus |
12339 | || cu->language == language_fortran | |
c44af4eb TT |
12340 | || cu->language == language_d |
12341 | || cu->language == language_rust) | |
4d4ec4e5 | 12342 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12343 | block_set_scope (block, determine_prefix (die, cu), |
12344 | &objfile->objfile_obstack); | |
df8a16a1 | 12345 | |
801e3a5b JB |
12346 | /* If we have address ranges, record them. */ |
12347 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12348 | |
fe978cb0 | 12349 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 12350 | |
34eaf542 | 12351 | /* Attach template arguments to function. */ |
2f4732b0 | 12352 | if (!template_args.empty ()) |
34eaf542 TT |
12353 | { |
12354 | gdb_assert (templ_func != NULL); | |
12355 | ||
2f4732b0 | 12356 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 12357 | templ_func->template_arguments |
8d749320 SM |
12358 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
12359 | templ_func->n_template_arguments); | |
34eaf542 | 12360 | memcpy (templ_func->template_arguments, |
2f4732b0 | 12361 | template_args.data (), |
34eaf542 | 12362 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
34eaf542 TT |
12363 | } |
12364 | ||
208d8187 JB |
12365 | /* In C++, we can have functions nested inside functions (e.g., when |
12366 | a function declares a class that has methods). This means that | |
12367 | when we finish processing a function scope, we may need to go | |
12368 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 12369 | local_symbols = newobj->locals; |
22cee43f | 12370 | local_using_directives = newobj->local_using_directives; |
208d8187 | 12371 | |
921e78cf JB |
12372 | /* If we've finished processing a top-level function, subsequent |
12373 | symbols go in the file symbol list. */ | |
12374 | if (outermost_context_p ()) | |
e142c38c | 12375 | cu->list_in_scope = &file_symbols; |
c906108c SS |
12376 | } |
12377 | ||
12378 | /* Process all the DIES contained within a lexical block scope. Start | |
12379 | a new scope, process the dies, and then close the scope. */ | |
12380 | ||
12381 | static void | |
e7c27a73 | 12382 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12383 | { |
e7c27a73 | 12384 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12385 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12386 | struct context_stack *newobj; |
c906108c SS |
12387 | CORE_ADDR lowpc, highpc; |
12388 | struct die_info *child_die; | |
e142c38c DJ |
12389 | CORE_ADDR baseaddr; |
12390 | ||
12391 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
12392 | |
12393 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
12394 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
12395 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 12396 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 12397 | describe ranges. */ |
e385593e JK |
12398 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
12399 | { | |
12400 | case PC_BOUNDS_NOT_PRESENT: | |
12401 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
12402 | there was no wrapping by that DW_TAG_lexical_block. | |
12403 | GCC does no longer produces such DWARF since GCC r224161. */ | |
12404 | for (child_die = die->child; | |
12405 | child_die != NULL && child_die->tag; | |
12406 | child_die = sibling_die (child_die)) | |
12407 | process_die (child_die, cu); | |
12408 | return; | |
12409 | case PC_BOUNDS_INVALID: | |
12410 | return; | |
12411 | } | |
3e29f34a MR |
12412 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12413 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
12414 | |
12415 | push_context (0, lowpc); | |
639d11d3 | 12416 | if (die->child != NULL) |
c906108c | 12417 | { |
639d11d3 | 12418 | child_die = die->child; |
c906108c SS |
12419 | while (child_die && child_die->tag) |
12420 | { | |
e7c27a73 | 12421 | process_die (child_die, cu); |
c906108c SS |
12422 | child_die = sibling_die (child_die); |
12423 | } | |
12424 | } | |
3ea89b92 | 12425 | inherit_abstract_dies (die, cu); |
fe978cb0 | 12426 | newobj = pop_context (); |
c906108c | 12427 | |
22cee43f | 12428 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 12429 | { |
801e3a5b | 12430 | struct block *block |
63e43d3a | 12431 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 12432 | newobj->start_addr, highpc); |
801e3a5b JB |
12433 | |
12434 | /* Note that recording ranges after traversing children, as we | |
12435 | do here, means that recording a parent's ranges entails | |
12436 | walking across all its children's ranges as they appear in | |
12437 | the address map, which is quadratic behavior. | |
12438 | ||
12439 | It would be nicer to record the parent's ranges before | |
12440 | traversing its children, simply overriding whatever you find | |
12441 | there. But since we don't even decide whether to create a | |
12442 | block until after we've traversed its children, that's hard | |
12443 | to do. */ | |
12444 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 12445 | } |
fe978cb0 | 12446 | local_symbols = newobj->locals; |
22cee43f | 12447 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
12448 | } |
12449 | ||
216f72a1 | 12450 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
12451 | |
12452 | static void | |
12453 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12454 | { | |
12455 | struct objfile *objfile = cu->objfile; | |
12456 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12457 | CORE_ADDR pc, baseaddr; | |
12458 | struct attribute *attr; | |
12459 | struct call_site *call_site, call_site_local; | |
12460 | void **slot; | |
12461 | int nparams; | |
12462 | struct die_info *child_die; | |
12463 | ||
12464 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12465 | ||
216f72a1 JK |
12466 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
12467 | if (attr == NULL) | |
12468 | { | |
12469 | /* This was a pre-DWARF-5 GNU extension alias | |
12470 | for DW_AT_call_return_pc. */ | |
12471 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
12472 | } | |
96408a79 SA |
12473 | if (!attr) |
12474 | { | |
12475 | complaint (&symfile_complaints, | |
216f72a1 | 12476 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 12477 | "DIE 0x%x [in module %s]"), |
9c541725 | 12478 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12479 | return; |
12480 | } | |
31aa7e4e | 12481 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 12482 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
12483 | |
12484 | if (cu->call_site_htab == NULL) | |
12485 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
12486 | NULL, &objfile->objfile_obstack, | |
12487 | hashtab_obstack_allocate, NULL); | |
12488 | call_site_local.pc = pc; | |
12489 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
12490 | if (*slot != NULL) | |
12491 | { | |
12492 | complaint (&symfile_complaints, | |
216f72a1 | 12493 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 12494 | "DIE 0x%x [in module %s]"), |
9c541725 | 12495 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 12496 | objfile_name (objfile)); |
96408a79 SA |
12497 | return; |
12498 | } | |
12499 | ||
12500 | /* Count parameters at the caller. */ | |
12501 | ||
12502 | nparams = 0; | |
12503 | for (child_die = die->child; child_die && child_die->tag; | |
12504 | child_die = sibling_die (child_die)) | |
12505 | { | |
216f72a1 JK |
12506 | if (child_die->tag != DW_TAG_call_site_parameter |
12507 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12508 | { |
12509 | complaint (&symfile_complaints, | |
216f72a1 JK |
12510 | _("Tag %d is not DW_TAG_call_site_parameter in " |
12511 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 12512 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 12513 | objfile_name (objfile)); |
96408a79 SA |
12514 | continue; |
12515 | } | |
12516 | ||
12517 | nparams++; | |
12518 | } | |
12519 | ||
224c3ddb SM |
12520 | call_site |
12521 | = ((struct call_site *) | |
12522 | obstack_alloc (&objfile->objfile_obstack, | |
12523 | sizeof (*call_site) | |
12524 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
12525 | *slot = call_site; |
12526 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
12527 | call_site->pc = pc; | |
12528 | ||
216f72a1 JK |
12529 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
12530 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
12531 | { |
12532 | struct die_info *func_die; | |
12533 | ||
12534 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
12535 | for (func_die = die->parent; | |
12536 | func_die && func_die->tag != DW_TAG_subprogram | |
12537 | && func_die->tag != DW_TAG_subroutine_type; | |
12538 | func_die = func_die->parent); | |
12539 | ||
216f72a1 JK |
12540 | /* DW_AT_call_all_calls is a superset |
12541 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 12542 | if (func_die |
216f72a1 | 12543 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 12544 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 12545 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
12546 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
12547 | { | |
12548 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
12549 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
12550 | both the initial caller containing the real return address PC and | |
12551 | the final callee containing the current PC of a chain of tail | |
12552 | calls do not need to have the tail call list complete. But any | |
12553 | function candidate for a virtual tail call frame searched via | |
12554 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
12555 | determined unambiguously. */ | |
12556 | } | |
12557 | else | |
12558 | { | |
12559 | struct type *func_type = NULL; | |
12560 | ||
12561 | if (func_die) | |
12562 | func_type = get_die_type (func_die, cu); | |
12563 | if (func_type != NULL) | |
12564 | { | |
12565 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
12566 | ||
12567 | /* Enlist this call site to the function. */ | |
12568 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
12569 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
12570 | } | |
12571 | else | |
12572 | complaint (&symfile_complaints, | |
216f72a1 | 12573 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 12574 | "DIE 0x%x [in module %s]"), |
9c541725 | 12575 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12576 | } |
12577 | } | |
12578 | ||
216f72a1 JK |
12579 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
12580 | if (attr == NULL) | |
12581 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
12582 | if (attr == NULL) | |
12583 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 12584 | if (attr == NULL) |
216f72a1 JK |
12585 | { |
12586 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
12587 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12588 | } | |
96408a79 SA |
12589 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12590 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12591 | /* Keep NULL DWARF_BLOCK. */; | |
12592 | else if (attr_form_is_block (attr)) | |
12593 | { | |
12594 | struct dwarf2_locexpr_baton *dlbaton; | |
12595 | ||
8d749320 | 12596 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12597 | dlbaton->data = DW_BLOCK (attr)->data; |
12598 | dlbaton->size = DW_BLOCK (attr)->size; | |
12599 | dlbaton->per_cu = cu->per_cu; | |
12600 | ||
12601 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12602 | } | |
7771576e | 12603 | else if (attr_form_is_ref (attr)) |
96408a79 | 12604 | { |
96408a79 SA |
12605 | struct dwarf2_cu *target_cu = cu; |
12606 | struct die_info *target_die; | |
12607 | ||
ac9ec31b | 12608 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12609 | gdb_assert (target_cu->objfile == objfile); |
12610 | if (die_is_declaration (target_die, target_cu)) | |
12611 | { | |
7d45c7c3 | 12612 | const char *target_physname; |
9112db09 JK |
12613 | |
12614 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12615 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12616 | if (target_physname == NULL) |
9112db09 | 12617 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12618 | if (target_physname == NULL) |
12619 | complaint (&symfile_complaints, | |
216f72a1 | 12620 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12621 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12622 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12623 | else |
7d455152 | 12624 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12625 | } |
12626 | else | |
12627 | { | |
12628 | CORE_ADDR lowpc; | |
12629 | ||
12630 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12631 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12632 | <= PC_BOUNDS_INVALID) |
96408a79 | 12633 | complaint (&symfile_complaints, |
216f72a1 | 12634 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12635 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12636 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12637 | else |
3e29f34a MR |
12638 | { |
12639 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12640 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12641 | } | |
96408a79 SA |
12642 | } |
12643 | } | |
12644 | else | |
12645 | complaint (&symfile_complaints, | |
216f72a1 | 12646 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12647 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12648 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12649 | |
12650 | call_site->per_cu = cu->per_cu; | |
12651 | ||
12652 | for (child_die = die->child; | |
12653 | child_die && child_die->tag; | |
12654 | child_die = sibling_die (child_die)) | |
12655 | { | |
96408a79 | 12656 | struct call_site_parameter *parameter; |
1788b2d3 | 12657 | struct attribute *loc, *origin; |
96408a79 | 12658 | |
216f72a1 JK |
12659 | if (child_die->tag != DW_TAG_call_site_parameter |
12660 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12661 | { |
12662 | /* Already printed the complaint above. */ | |
12663 | continue; | |
12664 | } | |
12665 | ||
12666 | gdb_assert (call_site->parameter_count < nparams); | |
12667 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12668 | ||
1788b2d3 JK |
12669 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12670 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12671 | register is contained in DW_AT_call_value. */ |
96408a79 | 12672 | |
24c5c679 | 12673 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12674 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12675 | if (origin == NULL) | |
12676 | { | |
12677 | /* This was a pre-DWARF-5 GNU extension alias | |
12678 | for DW_AT_call_parameter. */ | |
12679 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12680 | } | |
7771576e | 12681 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12682 | { |
1788b2d3 | 12683 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12684 | |
12685 | sect_offset sect_off | |
12686 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12687 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12688 | { |
12689 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12690 | binding can be done only inside one CU. Such referenced DIE | |
12691 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12692 | complaint (&symfile_complaints, | |
216f72a1 JK |
12693 | _("DW_AT_call_parameter offset is not in CU for " |
12694 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12695 | to_underlying (child_die->sect_off), |
12696 | objfile_name (objfile)); | |
d76b7dbc JK |
12697 | continue; |
12698 | } | |
9c541725 PA |
12699 | parameter->u.param_cu_off |
12700 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12701 | } |
12702 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12703 | { |
12704 | complaint (&symfile_complaints, | |
12705 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12706 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12707 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12708 | continue; |
12709 | } | |
24c5c679 | 12710 | else |
96408a79 | 12711 | { |
24c5c679 JK |
12712 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12713 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12714 | if (parameter->u.dwarf_reg != -1) | |
12715 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
12716 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
12717 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
12718 | ¶meter->u.fb_offset)) | |
12719 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
12720 | else | |
12721 | { | |
12722 | complaint (&symfile_complaints, | |
12723 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
12724 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 12725 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 12726 | "[in module %s]"), |
9c541725 PA |
12727 | to_underlying (child_die->sect_off), |
12728 | objfile_name (objfile)); | |
24c5c679 JK |
12729 | continue; |
12730 | } | |
96408a79 SA |
12731 | } |
12732 | ||
216f72a1 JK |
12733 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
12734 | if (attr == NULL) | |
12735 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
12736 | if (!attr_form_is_block (attr)) |
12737 | { | |
12738 | complaint (&symfile_complaints, | |
216f72a1 JK |
12739 | _("No DW_FORM_block* DW_AT_call_value for " |
12740 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12741 | to_underlying (child_die->sect_off), |
12742 | objfile_name (objfile)); | |
96408a79 SA |
12743 | continue; |
12744 | } | |
12745 | parameter->value = DW_BLOCK (attr)->data; | |
12746 | parameter->value_size = DW_BLOCK (attr)->size; | |
12747 | ||
12748 | /* Parameters are not pre-cleared by memset above. */ | |
12749 | parameter->data_value = NULL; | |
12750 | parameter->data_value_size = 0; | |
12751 | call_site->parameter_count++; | |
12752 | ||
216f72a1 JK |
12753 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
12754 | if (attr == NULL) | |
12755 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
12756 | if (attr) |
12757 | { | |
12758 | if (!attr_form_is_block (attr)) | |
12759 | complaint (&symfile_complaints, | |
216f72a1 JK |
12760 | _("No DW_FORM_block* DW_AT_call_data_value for " |
12761 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12762 | to_underlying (child_die->sect_off), |
12763 | objfile_name (objfile)); | |
96408a79 SA |
12764 | else |
12765 | { | |
12766 | parameter->data_value = DW_BLOCK (attr)->data; | |
12767 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
12768 | } | |
12769 | } | |
12770 | } | |
12771 | } | |
12772 | ||
43988095 JK |
12773 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
12774 | reading .debug_rnglists. | |
12775 | Callback's type should be: | |
12776 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12777 | Return true if the attributes are present and valid, otherwise, | |
12778 | return false. */ | |
12779 | ||
12780 | template <typename Callback> | |
12781 | static bool | |
12782 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
12783 | Callback &&callback) | |
12784 | { | |
12785 | struct objfile *objfile = cu->objfile; | |
12786 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12787 | struct comp_unit_head *cu_header = &cu->header; | |
12788 | bfd *obfd = objfile->obfd; | |
12789 | unsigned int addr_size = cu_header->addr_size; | |
12790 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12791 | /* Base address selection entry. */ | |
12792 | CORE_ADDR base; | |
12793 | int found_base; | |
12794 | unsigned int dummy; | |
12795 | const gdb_byte *buffer; | |
12796 | CORE_ADDR low = 0; | |
12797 | CORE_ADDR high = 0; | |
12798 | CORE_ADDR baseaddr; | |
12799 | bool overflow = false; | |
12800 | ||
12801 | found_base = cu->base_known; | |
12802 | base = cu->base_address; | |
12803 | ||
12804 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
12805 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
12806 | { | |
12807 | complaint (&symfile_complaints, | |
12808 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12809 | offset); | |
12810 | return false; | |
12811 | } | |
12812 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
12813 | ||
12814 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12815 | ||
12816 | while (1) | |
12817 | { | |
7814882a JK |
12818 | /* Initialize it due to a false compiler warning. */ |
12819 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
12820 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
12821 | + dwarf2_per_objfile->rnglists.size); | |
12822 | unsigned int bytes_read; | |
12823 | ||
12824 | if (buffer == buf_end) | |
12825 | { | |
12826 | overflow = true; | |
12827 | break; | |
12828 | } | |
12829 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
12830 | switch (rlet) | |
12831 | { | |
12832 | case DW_RLE_end_of_list: | |
12833 | break; | |
12834 | case DW_RLE_base_address: | |
12835 | if (buffer + cu->header.addr_size > buf_end) | |
12836 | { | |
12837 | overflow = true; | |
12838 | break; | |
12839 | } | |
12840 | base = read_address (obfd, buffer, cu, &bytes_read); | |
12841 | found_base = 1; | |
12842 | buffer += bytes_read; | |
12843 | break; | |
12844 | case DW_RLE_start_length: | |
12845 | if (buffer + cu->header.addr_size > buf_end) | |
12846 | { | |
12847 | overflow = true; | |
12848 | break; | |
12849 | } | |
12850 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12851 | buffer += bytes_read; | |
12852 | range_end = (range_beginning | |
12853 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
12854 | buffer += bytes_read; | |
12855 | if (buffer > buf_end) | |
12856 | { | |
12857 | overflow = true; | |
12858 | break; | |
12859 | } | |
12860 | break; | |
12861 | case DW_RLE_offset_pair: | |
12862 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12863 | buffer += bytes_read; | |
12864 | if (buffer > buf_end) | |
12865 | { | |
12866 | overflow = true; | |
12867 | break; | |
12868 | } | |
12869 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12870 | buffer += bytes_read; | |
12871 | if (buffer > buf_end) | |
12872 | { | |
12873 | overflow = true; | |
12874 | break; | |
12875 | } | |
12876 | break; | |
12877 | case DW_RLE_start_end: | |
12878 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
12879 | { | |
12880 | overflow = true; | |
12881 | break; | |
12882 | } | |
12883 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12884 | buffer += bytes_read; | |
12885 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
12886 | buffer += bytes_read; | |
12887 | break; | |
12888 | default: | |
12889 | complaint (&symfile_complaints, | |
12890 | _("Invalid .debug_rnglists data (no base address)")); | |
12891 | return false; | |
12892 | } | |
12893 | if (rlet == DW_RLE_end_of_list || overflow) | |
12894 | break; | |
12895 | if (rlet == DW_RLE_base_address) | |
12896 | continue; | |
12897 | ||
12898 | if (!found_base) | |
12899 | { | |
12900 | /* We have no valid base address for the ranges | |
12901 | data. */ | |
12902 | complaint (&symfile_complaints, | |
12903 | _("Invalid .debug_rnglists data (no base address)")); | |
12904 | return false; | |
12905 | } | |
12906 | ||
12907 | if (range_beginning > range_end) | |
12908 | { | |
12909 | /* Inverted range entries are invalid. */ | |
12910 | complaint (&symfile_complaints, | |
12911 | _("Invalid .debug_rnglists data (inverted range)")); | |
12912 | return false; | |
12913 | } | |
12914 | ||
12915 | /* Empty range entries have no effect. */ | |
12916 | if (range_beginning == range_end) | |
12917 | continue; | |
12918 | ||
12919 | range_beginning += base; | |
12920 | range_end += base; | |
12921 | ||
12922 | /* A not-uncommon case of bad debug info. | |
12923 | Don't pollute the addrmap with bad data. */ | |
12924 | if (range_beginning + baseaddr == 0 | |
12925 | && !dwarf2_per_objfile->has_section_at_zero) | |
12926 | { | |
12927 | complaint (&symfile_complaints, | |
12928 | _(".debug_rnglists entry has start address of zero" | |
12929 | " [in module %s]"), objfile_name (objfile)); | |
12930 | continue; | |
12931 | } | |
12932 | ||
12933 | callback (range_beginning, range_end); | |
12934 | } | |
12935 | ||
12936 | if (overflow) | |
12937 | { | |
12938 | complaint (&symfile_complaints, | |
12939 | _("Offset %d is not terminated " | |
12940 | "for DW_AT_ranges attribute"), | |
12941 | offset); | |
12942 | return false; | |
12943 | } | |
12944 | ||
12945 | return true; | |
12946 | } | |
12947 | ||
12948 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
12949 | Callback's type should be: | |
12950 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 12951 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 12952 | |
43988095 | 12953 | template <typename Callback> |
43039443 | 12954 | static int |
5f46c5a5 | 12955 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 12956 | Callback &&callback) |
43039443 JK |
12957 | { |
12958 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 12959 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
12960 | struct comp_unit_head *cu_header = &cu->header; |
12961 | bfd *obfd = objfile->obfd; | |
12962 | unsigned int addr_size = cu_header->addr_size; | |
12963 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12964 | /* Base address selection entry. */ | |
12965 | CORE_ADDR base; | |
12966 | int found_base; | |
12967 | unsigned int dummy; | |
d521ce57 | 12968 | const gdb_byte *buffer; |
ff013f42 | 12969 | CORE_ADDR baseaddr; |
43039443 | 12970 | |
43988095 JK |
12971 | if (cu_header->version >= 5) |
12972 | return dwarf2_rnglists_process (offset, cu, callback); | |
12973 | ||
d00adf39 DE |
12974 | found_base = cu->base_known; |
12975 | base = cu->base_address; | |
43039443 | 12976 | |
be391dca | 12977 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12978 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
12979 | { |
12980 | complaint (&symfile_complaints, | |
12981 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12982 | offset); | |
12983 | return 0; | |
12984 | } | |
dce234bc | 12985 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 12986 | |
e7030f15 | 12987 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 12988 | |
43039443 JK |
12989 | while (1) |
12990 | { | |
12991 | CORE_ADDR range_beginning, range_end; | |
12992 | ||
12993 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
12994 | buffer += addr_size; | |
12995 | range_end = read_address (obfd, buffer, cu, &dummy); | |
12996 | buffer += addr_size; | |
12997 | offset += 2 * addr_size; | |
12998 | ||
12999 | /* An end of list marker is a pair of zero addresses. */ | |
13000 | if (range_beginning == 0 && range_end == 0) | |
13001 | /* Found the end of list entry. */ | |
13002 | break; | |
13003 | ||
13004 | /* Each base address selection entry is a pair of 2 values. | |
13005 | The first is the largest possible address, the second is | |
13006 | the base address. Check for a base address here. */ | |
13007 | if ((range_beginning & mask) == mask) | |
13008 | { | |
28d2bfb9 AB |
13009 | /* If we found the largest possible address, then we already |
13010 | have the base address in range_end. */ | |
13011 | base = range_end; | |
43039443 JK |
13012 | found_base = 1; |
13013 | continue; | |
13014 | } | |
13015 | ||
13016 | if (!found_base) | |
13017 | { | |
13018 | /* We have no valid base address for the ranges | |
13019 | data. */ | |
13020 | complaint (&symfile_complaints, | |
13021 | _("Invalid .debug_ranges data (no base address)")); | |
13022 | return 0; | |
13023 | } | |
13024 | ||
9277c30c UW |
13025 | if (range_beginning > range_end) |
13026 | { | |
13027 | /* Inverted range entries are invalid. */ | |
13028 | complaint (&symfile_complaints, | |
13029 | _("Invalid .debug_ranges data (inverted range)")); | |
13030 | return 0; | |
13031 | } | |
13032 | ||
13033 | /* Empty range entries have no effect. */ | |
13034 | if (range_beginning == range_end) | |
13035 | continue; | |
13036 | ||
43039443 JK |
13037 | range_beginning += base; |
13038 | range_end += base; | |
13039 | ||
01093045 DE |
13040 | /* A not-uncommon case of bad debug info. |
13041 | Don't pollute the addrmap with bad data. */ | |
13042 | if (range_beginning + baseaddr == 0 | |
13043 | && !dwarf2_per_objfile->has_section_at_zero) | |
13044 | { | |
13045 | complaint (&symfile_complaints, | |
13046 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 13047 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13048 | continue; |
13049 | } | |
13050 | ||
5f46c5a5 JK |
13051 | callback (range_beginning, range_end); |
13052 | } | |
13053 | ||
13054 | return 1; | |
13055 | } | |
13056 | ||
13057 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13058 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13059 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13060 | ||
13061 | static int | |
13062 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13063 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
13064 | struct partial_symtab *ranges_pst) | |
13065 | { | |
13066 | struct objfile *objfile = cu->objfile; | |
13067 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13068 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
13069 | SECT_OFF_TEXT (objfile)); | |
13070 | int low_set = 0; | |
13071 | CORE_ADDR low = 0; | |
13072 | CORE_ADDR high = 0; | |
13073 | int retval; | |
13074 | ||
13075 | retval = dwarf2_ranges_process (offset, cu, | |
13076 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13077 | { | |
9277c30c | 13078 | if (ranges_pst != NULL) |
3e29f34a MR |
13079 | { |
13080 | CORE_ADDR lowpc; | |
13081 | CORE_ADDR highpc; | |
13082 | ||
13083 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13084 | range_beginning + baseaddr); | |
13085 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
13086 | range_end + baseaddr); | |
13087 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
13088 | ranges_pst); | |
13089 | } | |
ff013f42 | 13090 | |
43039443 JK |
13091 | /* FIXME: This is recording everything as a low-high |
13092 | segment of consecutive addresses. We should have a | |
13093 | data structure for discontiguous block ranges | |
13094 | instead. */ | |
13095 | if (! low_set) | |
13096 | { | |
13097 | low = range_beginning; | |
13098 | high = range_end; | |
13099 | low_set = 1; | |
13100 | } | |
13101 | else | |
13102 | { | |
13103 | if (range_beginning < low) | |
13104 | low = range_beginning; | |
13105 | if (range_end > high) | |
13106 | high = range_end; | |
13107 | } | |
5f46c5a5 JK |
13108 | }); |
13109 | if (!retval) | |
13110 | return 0; | |
43039443 JK |
13111 | |
13112 | if (! low_set) | |
13113 | /* If the first entry is an end-of-list marker, the range | |
13114 | describes an empty scope, i.e. no instructions. */ | |
13115 | return 0; | |
13116 | ||
13117 | if (low_return) | |
13118 | *low_return = low; | |
13119 | if (high_return) | |
13120 | *high_return = high; | |
13121 | return 1; | |
13122 | } | |
13123 | ||
3a2b436a JK |
13124 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13125 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13126 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13127 | |
3a2b436a | 13128 | static enum pc_bounds_kind |
af34e669 | 13129 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
13130 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
13131 | struct partial_symtab *pst) | |
c906108c SS |
13132 | { |
13133 | struct attribute *attr; | |
91da1414 | 13134 | struct attribute *attr_high; |
af34e669 DJ |
13135 | CORE_ADDR low = 0; |
13136 | CORE_ADDR high = 0; | |
e385593e | 13137 | enum pc_bounds_kind ret; |
c906108c | 13138 | |
91da1414 MW |
13139 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13140 | if (attr_high) | |
af34e669 | 13141 | { |
e142c38c | 13142 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 13143 | if (attr) |
91da1414 | 13144 | { |
31aa7e4e JB |
13145 | low = attr_value_as_address (attr); |
13146 | high = attr_value_as_address (attr_high); | |
13147 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13148 | high += low; | |
91da1414 | 13149 | } |
af34e669 DJ |
13150 | else |
13151 | /* Found high w/o low attribute. */ | |
e385593e | 13152 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13153 | |
13154 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13155 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13156 | } |
c906108c | 13157 | else |
af34e669 | 13158 | { |
e142c38c | 13159 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13160 | if (attr != NULL) |
13161 | { | |
ab435259 DE |
13162 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13163 | We take advantage of the fact that DW_AT_ranges does not appear | |
13164 | in DW_TAG_compile_unit of DWO files. */ | |
13165 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13166 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13167 | + (need_ranges_base | |
13168 | ? cu->ranges_base | |
13169 | : 0)); | |
2e3cf129 | 13170 | |
af34e669 | 13171 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13172 | .debug_ranges section. */ |
2e3cf129 | 13173 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13174 | return PC_BOUNDS_INVALID; |
43039443 | 13175 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13176 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13177 | } |
e385593e JK |
13178 | else |
13179 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13180 | } |
c906108c | 13181 | |
9373cf26 JK |
13182 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
13183 | if (high <= low) | |
e385593e | 13184 | return PC_BOUNDS_INVALID; |
c906108c SS |
13185 | |
13186 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13187 | eliminate duplicate copies of functions and vtables and such. | |
13188 | The linker will arbitrarily choose one and discard the others. | |
13189 | The AT_*_pc values for such functions refer to local labels in | |
13190 | these sections. If the section from that file was discarded, the | |
13191 | labels are not in the output, so the relocs get a value of 0. | |
13192 | If this is a discarded function, mark the pc bounds as invalid, | |
13193 | so that GDB will ignore it. */ | |
72dca2f5 | 13194 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13195 | return PC_BOUNDS_INVALID; |
c906108c SS |
13196 | |
13197 | *lowpc = low; | |
96408a79 SA |
13198 | if (highpc) |
13199 | *highpc = high; | |
af34e669 | 13200 | return ret; |
c906108c SS |
13201 | } |
13202 | ||
b084d499 JB |
13203 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13204 | its low and high PC addresses. Do nothing if these addresses could not | |
13205 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13206 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13207 | ||
13208 | static void | |
13209 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13210 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13211 | struct dwarf2_cu *cu) | |
13212 | { | |
13213 | CORE_ADDR low, high; | |
13214 | struct die_info *child = die->child; | |
13215 | ||
e385593e | 13216 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13217 | { |
325fac50 PA |
13218 | *lowpc = std::min (*lowpc, low); |
13219 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13220 | } |
13221 | ||
13222 | /* If the language does not allow nested subprograms (either inside | |
13223 | subprograms or lexical blocks), we're done. */ | |
13224 | if (cu->language != language_ada) | |
13225 | return; | |
6e70227d | 13226 | |
b084d499 JB |
13227 | /* Check all the children of the given DIE. If it contains nested |
13228 | subprograms, then check their pc bounds. Likewise, we need to | |
13229 | check lexical blocks as well, as they may also contain subprogram | |
13230 | definitions. */ | |
13231 | while (child && child->tag) | |
13232 | { | |
13233 | if (child->tag == DW_TAG_subprogram | |
13234 | || child->tag == DW_TAG_lexical_block) | |
13235 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13236 | child = sibling_die (child); | |
13237 | } | |
13238 | } | |
13239 | ||
fae299cd DC |
13240 | /* Get the low and high pc's represented by the scope DIE, and store |
13241 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13242 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13243 | ||
13244 | static void | |
13245 | get_scope_pc_bounds (struct die_info *die, | |
13246 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13247 | struct dwarf2_cu *cu) | |
13248 | { | |
13249 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13250 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13251 | CORE_ADDR current_low, current_high; | |
13252 | ||
3a2b436a | 13253 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13254 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13255 | { |
13256 | best_low = current_low; | |
13257 | best_high = current_high; | |
13258 | } | |
13259 | else | |
13260 | { | |
13261 | struct die_info *child = die->child; | |
13262 | ||
13263 | while (child && child->tag) | |
13264 | { | |
13265 | switch (child->tag) { | |
13266 | case DW_TAG_subprogram: | |
b084d499 | 13267 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13268 | break; |
13269 | case DW_TAG_namespace: | |
f55ee35c | 13270 | case DW_TAG_module: |
fae299cd DC |
13271 | /* FIXME: carlton/2004-01-16: Should we do this for |
13272 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13273 | that current GCC's always emit the DIEs corresponding | |
13274 | to definitions of methods of classes as children of a | |
13275 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13276 | the DIEs giving the declarations, which could be | |
13277 | anywhere). But I don't see any reason why the | |
13278 | standards says that they have to be there. */ | |
13279 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13280 | ||
13281 | if (current_low != ((CORE_ADDR) -1)) | |
13282 | { | |
325fac50 PA |
13283 | best_low = std::min (best_low, current_low); |
13284 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13285 | } |
13286 | break; | |
13287 | default: | |
0963b4bd | 13288 | /* Ignore. */ |
fae299cd DC |
13289 | break; |
13290 | } | |
13291 | ||
13292 | child = sibling_die (child); | |
13293 | } | |
13294 | } | |
13295 | ||
13296 | *lowpc = best_low; | |
13297 | *highpc = best_high; | |
13298 | } | |
13299 | ||
801e3a5b JB |
13300 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13301 | in DIE. */ | |
380bca97 | 13302 | |
801e3a5b JB |
13303 | static void |
13304 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
13305 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
13306 | { | |
bb5ed363 | 13307 | struct objfile *objfile = cu->objfile; |
3e29f34a | 13308 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 13309 | struct attribute *attr; |
91da1414 | 13310 | struct attribute *attr_high; |
801e3a5b | 13311 | |
91da1414 MW |
13312 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13313 | if (attr_high) | |
801e3a5b | 13314 | { |
801e3a5b JB |
13315 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
13316 | if (attr) | |
13317 | { | |
31aa7e4e JB |
13318 | CORE_ADDR low = attr_value_as_address (attr); |
13319 | CORE_ADDR high = attr_value_as_address (attr_high); | |
13320 | ||
13321 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
13322 | high += low; | |
9a619af0 | 13323 | |
3e29f34a MR |
13324 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
13325 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
13326 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
13327 | } |
13328 | } | |
13329 | ||
13330 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
13331 | if (attr) | |
13332 | { | |
bb5ed363 | 13333 | bfd *obfd = objfile->obfd; |
ab435259 DE |
13334 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
13335 | We take advantage of the fact that DW_AT_ranges does not appear | |
13336 | in DW_TAG_compile_unit of DWO files. */ | |
13337 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
13338 | |
13339 | /* The value of the DW_AT_ranges attribute is the offset of the | |
13340 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
13341 | unsigned long offset = (DW_UNSND (attr) |
13342 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 13343 | const gdb_byte *buffer; |
801e3a5b JB |
13344 | |
13345 | /* For some target architectures, but not others, the | |
13346 | read_address function sign-extends the addresses it returns. | |
13347 | To recognize base address selection entries, we need a | |
13348 | mask. */ | |
13349 | unsigned int addr_size = cu->header.addr_size; | |
13350 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13351 | ||
13352 | /* The base address, to which the next pair is relative. Note | |
13353 | that this 'base' is a DWARF concept: most entries in a range | |
13354 | list are relative, to reduce the number of relocs against the | |
13355 | debugging information. This is separate from this function's | |
13356 | 'baseaddr' argument, which GDB uses to relocate debugging | |
13357 | information from a shared library based on the address at | |
13358 | which the library was loaded. */ | |
d00adf39 DE |
13359 | CORE_ADDR base = cu->base_address; |
13360 | int base_known = cu->base_known; | |
801e3a5b | 13361 | |
5f46c5a5 JK |
13362 | dwarf2_ranges_process (offset, cu, |
13363 | [&] (CORE_ADDR start, CORE_ADDR end) | |
13364 | { | |
58fdfd2c JK |
13365 | start += baseaddr; |
13366 | end += baseaddr; | |
5f46c5a5 JK |
13367 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
13368 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
13369 | record_block_range (block, start, end - 1); | |
13370 | }); | |
801e3a5b JB |
13371 | } |
13372 | } | |
13373 | ||
685b1105 JK |
13374 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
13375 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 13376 | |
685b1105 JK |
13377 | static void |
13378 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 13379 | { |
38360086 | 13380 | int major, minor; |
60d5a603 JK |
13381 | |
13382 | if (cu->producer == NULL) | |
13383 | { | |
13384 | /* For unknown compilers expect their behavior is DWARF version | |
13385 | compliant. | |
13386 | ||
13387 | GCC started to support .debug_types sections by -gdwarf-4 since | |
13388 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
13389 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
13390 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
13391 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 13392 | } |
b1ffba5a | 13393 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 13394 | { |
38360086 MW |
13395 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
13396 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 13397 | } |
5230b05a WT |
13398 | else if (producer_is_icc (cu->producer, &major, &minor)) |
13399 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
13400 | else |
13401 | { | |
13402 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
13403 | compliant. */ | |
60d5a603 JK |
13404 | } |
13405 | ||
ba919b58 | 13406 | cu->checked_producer = 1; |
685b1105 | 13407 | } |
ba919b58 | 13408 | |
685b1105 JK |
13409 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
13410 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
13411 | during 4.6.0 experimental. */ | |
13412 | ||
13413 | static int | |
13414 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
13415 | { | |
13416 | if (!cu->checked_producer) | |
13417 | check_producer (cu); | |
13418 | ||
13419 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
13420 | } |
13421 | ||
13422 | /* Return the default accessibility type if it is not overriden by | |
13423 | DW_AT_accessibility. */ | |
13424 | ||
13425 | static enum dwarf_access_attribute | |
13426 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
13427 | { | |
13428 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
13429 | { | |
13430 | /* The default DWARF 2 accessibility for members is public, the default | |
13431 | accessibility for inheritance is private. */ | |
13432 | ||
13433 | if (die->tag != DW_TAG_inheritance) | |
13434 | return DW_ACCESS_public; | |
13435 | else | |
13436 | return DW_ACCESS_private; | |
13437 | } | |
13438 | else | |
13439 | { | |
13440 | /* DWARF 3+ defines the default accessibility a different way. The same | |
13441 | rules apply now for DW_TAG_inheritance as for the members and it only | |
13442 | depends on the container kind. */ | |
13443 | ||
13444 | if (die->parent->tag == DW_TAG_class_type) | |
13445 | return DW_ACCESS_private; | |
13446 | else | |
13447 | return DW_ACCESS_public; | |
13448 | } | |
13449 | } | |
13450 | ||
74ac6d43 TT |
13451 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
13452 | offset. If the attribute was not found return 0, otherwise return | |
13453 | 1. If it was found but could not properly be handled, set *OFFSET | |
13454 | to 0. */ | |
13455 | ||
13456 | static int | |
13457 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
13458 | LONGEST *offset) | |
13459 | { | |
13460 | struct attribute *attr; | |
13461 | ||
13462 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
13463 | if (attr != NULL) | |
13464 | { | |
13465 | *offset = 0; | |
13466 | ||
13467 | /* Note that we do not check for a section offset first here. | |
13468 | This is because DW_AT_data_member_location is new in DWARF 4, | |
13469 | so if we see it, we can assume that a constant form is really | |
13470 | a constant and not a section offset. */ | |
13471 | if (attr_form_is_constant (attr)) | |
13472 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
13473 | else if (attr_form_is_section_offset (attr)) | |
13474 | dwarf2_complex_location_expr_complaint (); | |
13475 | else if (attr_form_is_block (attr)) | |
13476 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
13477 | else | |
13478 | dwarf2_complex_location_expr_complaint (); | |
13479 | ||
13480 | return 1; | |
13481 | } | |
13482 | ||
13483 | return 0; | |
13484 | } | |
13485 | ||
c906108c SS |
13486 | /* Add an aggregate field to the field list. */ |
13487 | ||
13488 | static void | |
107d2387 | 13489 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13490 | struct dwarf2_cu *cu) |
6e70227d | 13491 | { |
e7c27a73 | 13492 | struct objfile *objfile = cu->objfile; |
5e2b427d | 13493 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13494 | struct nextfield *new_field; |
13495 | struct attribute *attr; | |
13496 | struct field *fp; | |
15d034d0 | 13497 | const char *fieldname = ""; |
c906108c SS |
13498 | |
13499 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13500 | new_field = XNEW (struct nextfield); |
b8c9b27d | 13501 | make_cleanup (xfree, new_field); |
c906108c | 13502 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
13503 | |
13504 | if (die->tag == DW_TAG_inheritance) | |
13505 | { | |
13506 | new_field->next = fip->baseclasses; | |
13507 | fip->baseclasses = new_field; | |
13508 | } | |
13509 | else | |
13510 | { | |
13511 | new_field->next = fip->fields; | |
13512 | fip->fields = new_field; | |
13513 | } | |
c906108c SS |
13514 | fip->nfields++; |
13515 | ||
e142c38c | 13516 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
13517 | if (attr) |
13518 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
13519 | else |
13520 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
13521 | if (new_field->accessibility != DW_ACCESS_public) |
13522 | fip->non_public_fields = 1; | |
60d5a603 | 13523 | |
e142c38c | 13524 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
13525 | if (attr) |
13526 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
13527 | else |
13528 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
13529 | |
13530 | fp = &new_field->field; | |
a9a9bd0f | 13531 | |
e142c38c | 13532 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 13533 | { |
74ac6d43 TT |
13534 | LONGEST offset; |
13535 | ||
a9a9bd0f | 13536 | /* Data member other than a C++ static data member. */ |
6e70227d | 13537 | |
c906108c | 13538 | /* Get type of field. */ |
e7c27a73 | 13539 | fp->type = die_type (die, cu); |
c906108c | 13540 | |
d6a843b5 | 13541 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 13542 | |
c906108c | 13543 | /* Get bit size of field (zero if none). */ |
e142c38c | 13544 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
13545 | if (attr) |
13546 | { | |
13547 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
13548 | } | |
13549 | else | |
13550 | { | |
13551 | FIELD_BITSIZE (*fp) = 0; | |
13552 | } | |
13553 | ||
13554 | /* Get bit offset of field. */ | |
74ac6d43 TT |
13555 | if (handle_data_member_location (die, cu, &offset)) |
13556 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 13557 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
13558 | if (attr) |
13559 | { | |
5e2b427d | 13560 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
13561 | { |
13562 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
13563 | additional bit offset from the MSB of the containing |
13564 | anonymous object to the MSB of the field. We don't | |
13565 | have to do anything special since we don't need to | |
13566 | know the size of the anonymous object. */ | |
f41f5e61 | 13567 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
13568 | } |
13569 | else | |
13570 | { | |
13571 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
13572 | MSB of the anonymous object, subtract off the number of |
13573 | bits from the MSB of the field to the MSB of the | |
13574 | object, and then subtract off the number of bits of | |
13575 | the field itself. The result is the bit offset of | |
13576 | the LSB of the field. */ | |
c906108c SS |
13577 | int anonymous_size; |
13578 | int bit_offset = DW_UNSND (attr); | |
13579 | ||
e142c38c | 13580 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13581 | if (attr) |
13582 | { | |
13583 | /* The size of the anonymous object containing | |
13584 | the bit field is explicit, so use the | |
13585 | indicated size (in bytes). */ | |
13586 | anonymous_size = DW_UNSND (attr); | |
13587 | } | |
13588 | else | |
13589 | { | |
13590 | /* The size of the anonymous object containing | |
13591 | the bit field must be inferred from the type | |
13592 | attribute of the data member containing the | |
13593 | bit field. */ | |
13594 | anonymous_size = TYPE_LENGTH (fp->type); | |
13595 | } | |
f41f5e61 PA |
13596 | SET_FIELD_BITPOS (*fp, |
13597 | (FIELD_BITPOS (*fp) | |
13598 | + anonymous_size * bits_per_byte | |
13599 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13600 | } |
13601 | } | |
da5b30da AA |
13602 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13603 | if (attr != NULL) | |
13604 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13605 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13606 | |
13607 | /* Get name of field. */ | |
39cbfefa DJ |
13608 | fieldname = dwarf2_name (die, cu); |
13609 | if (fieldname == NULL) | |
13610 | fieldname = ""; | |
d8151005 DJ |
13611 | |
13612 | /* The name is already allocated along with this objfile, so we don't | |
13613 | need to duplicate it for the type. */ | |
13614 | fp->name = fieldname; | |
c906108c SS |
13615 | |
13616 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13617 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13618 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13619 | { |
d48cc9dd | 13620 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13621 | new_field->accessibility = DW_ACCESS_private; |
13622 | fip->non_public_fields = 1; | |
13623 | } | |
13624 | } | |
a9a9bd0f | 13625 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13626 | { |
a9a9bd0f DC |
13627 | /* C++ static member. */ |
13628 | ||
13629 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13630 | is a declaration, but all versions of G++ as of this writing | |
13631 | (so through at least 3.2.1) incorrectly generate | |
13632 | DW_TAG_variable tags. */ | |
6e70227d | 13633 | |
ff355380 | 13634 | const char *physname; |
c906108c | 13635 | |
a9a9bd0f | 13636 | /* Get name of field. */ |
39cbfefa DJ |
13637 | fieldname = dwarf2_name (die, cu); |
13638 | if (fieldname == NULL) | |
c906108c SS |
13639 | return; |
13640 | ||
254e6b9e | 13641 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13642 | if (attr |
13643 | /* Only create a symbol if this is an external value. | |
13644 | new_symbol checks this and puts the value in the global symbol | |
13645 | table, which we want. If it is not external, new_symbol | |
13646 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13647 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13648 | { |
13649 | /* A static const member, not much different than an enum as far as | |
13650 | we're concerned, except that we can support more types. */ | |
13651 | new_symbol (die, NULL, cu); | |
13652 | } | |
13653 | ||
2df3850c | 13654 | /* Get physical name. */ |
ff355380 | 13655 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13656 | |
d8151005 DJ |
13657 | /* The name is already allocated along with this objfile, so we don't |
13658 | need to duplicate it for the type. */ | |
13659 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13660 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13661 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13662 | } |
13663 | else if (die->tag == DW_TAG_inheritance) | |
13664 | { | |
74ac6d43 | 13665 | LONGEST offset; |
d4b96c9a | 13666 | |
74ac6d43 TT |
13667 | /* C++ base class field. */ |
13668 | if (handle_data_member_location (die, cu, &offset)) | |
13669 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 13670 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 13671 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
13672 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
13673 | fip->nbaseclasses++; | |
13674 | } | |
13675 | } | |
13676 | ||
98751a41 JK |
13677 | /* Add a typedef defined in the scope of the FIP's class. */ |
13678 | ||
13679 | static void | |
13680 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
13681 | struct dwarf2_cu *cu) | |
6e70227d | 13682 | { |
98751a41 | 13683 | struct typedef_field_list *new_field; |
98751a41 | 13684 | struct typedef_field *fp; |
98751a41 JK |
13685 | |
13686 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13687 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
13688 | make_cleanup (xfree, new_field); |
13689 | ||
13690 | gdb_assert (die->tag == DW_TAG_typedef); | |
13691 | ||
13692 | fp = &new_field->field; | |
13693 | ||
13694 | /* Get name of field. */ | |
13695 | fp->name = dwarf2_name (die, cu); | |
13696 | if (fp->name == NULL) | |
13697 | return; | |
13698 | ||
13699 | fp->type = read_type_die (die, cu); | |
13700 | ||
c191a687 KS |
13701 | /* Save accessibility. */ |
13702 | enum dwarf_access_attribute accessibility; | |
13703 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
13704 | if (attr != NULL) | |
13705 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
13706 | else | |
13707 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13708 | switch (accessibility) | |
13709 | { | |
13710 | case DW_ACCESS_public: | |
13711 | /* The assumed value if neither private nor protected. */ | |
13712 | break; | |
13713 | case DW_ACCESS_private: | |
13714 | fp->is_private = 1; | |
13715 | break; | |
13716 | case DW_ACCESS_protected: | |
13717 | fp->is_protected = 1; | |
13718 | break; | |
13719 | default: | |
37534686 KS |
13720 | complaint (&symfile_complaints, |
13721 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); | |
c191a687 KS |
13722 | } |
13723 | ||
98751a41 JK |
13724 | new_field->next = fip->typedef_field_list; |
13725 | fip->typedef_field_list = new_field; | |
13726 | fip->typedef_field_list_count++; | |
13727 | } | |
13728 | ||
c906108c SS |
13729 | /* Create the vector of fields, and attach it to the type. */ |
13730 | ||
13731 | static void | |
fba45db2 | 13732 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13733 | struct dwarf2_cu *cu) |
c906108c SS |
13734 | { |
13735 | int nfields = fip->nfields; | |
13736 | ||
13737 | /* Record the field count, allocate space for the array of fields, | |
13738 | and create blank accessibility bitfields if necessary. */ | |
13739 | TYPE_NFIELDS (type) = nfields; | |
13740 | TYPE_FIELDS (type) = (struct field *) | |
13741 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
13742 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
13743 | ||
b4ba55a1 | 13744 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
13745 | { |
13746 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13747 | ||
13748 | TYPE_FIELD_PRIVATE_BITS (type) = | |
13749 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13750 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
13751 | ||
13752 | TYPE_FIELD_PROTECTED_BITS (type) = | |
13753 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13754 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
13755 | ||
774b6a14 TT |
13756 | TYPE_FIELD_IGNORE_BITS (type) = |
13757 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13758 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
13759 | } |
13760 | ||
13761 | /* If the type has baseclasses, allocate and clear a bit vector for | |
13762 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 13763 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
13764 | { |
13765 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 13766 | unsigned char *pointer; |
c906108c SS |
13767 | |
13768 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 13769 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 13770 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
13771 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
13772 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
13773 | } | |
13774 | ||
3e43a32a MS |
13775 | /* Copy the saved-up fields into the field vector. Start from the head of |
13776 | the list, adding to the tail of the field array, so that they end up in | |
13777 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
13778 | while (nfields-- > 0) |
13779 | { | |
7d0ccb61 DJ |
13780 | struct nextfield *fieldp; |
13781 | ||
13782 | if (fip->fields) | |
13783 | { | |
13784 | fieldp = fip->fields; | |
13785 | fip->fields = fieldp->next; | |
13786 | } | |
13787 | else | |
13788 | { | |
13789 | fieldp = fip->baseclasses; | |
13790 | fip->baseclasses = fieldp->next; | |
13791 | } | |
13792 | ||
13793 | TYPE_FIELD (type, nfields) = fieldp->field; | |
13794 | switch (fieldp->accessibility) | |
c906108c | 13795 | { |
c5aa993b | 13796 | case DW_ACCESS_private: |
b4ba55a1 JB |
13797 | if (cu->language != language_ada) |
13798 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 13799 | break; |
c906108c | 13800 | |
c5aa993b | 13801 | case DW_ACCESS_protected: |
b4ba55a1 JB |
13802 | if (cu->language != language_ada) |
13803 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 13804 | break; |
c906108c | 13805 | |
c5aa993b JM |
13806 | case DW_ACCESS_public: |
13807 | break; | |
c906108c | 13808 | |
c5aa993b JM |
13809 | default: |
13810 | /* Unknown accessibility. Complain and treat it as public. */ | |
13811 | { | |
e2e0b3e5 | 13812 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 13813 | fieldp->accessibility); |
c5aa993b JM |
13814 | } |
13815 | break; | |
c906108c SS |
13816 | } |
13817 | if (nfields < fip->nbaseclasses) | |
13818 | { | |
7d0ccb61 | 13819 | switch (fieldp->virtuality) |
c906108c | 13820 | { |
c5aa993b JM |
13821 | case DW_VIRTUALITY_virtual: |
13822 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 13823 | if (cu->language == language_ada) |
a73c6dcd | 13824 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
13825 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
13826 | break; | |
c906108c SS |
13827 | } |
13828 | } | |
c906108c SS |
13829 | } |
13830 | } | |
13831 | ||
7d27a96d TT |
13832 | /* Return true if this member function is a constructor, false |
13833 | otherwise. */ | |
13834 | ||
13835 | static int | |
13836 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
13837 | { | |
13838 | const char *fieldname; | |
fe978cb0 | 13839 | const char *type_name; |
7d27a96d TT |
13840 | int len; |
13841 | ||
13842 | if (die->parent == NULL) | |
13843 | return 0; | |
13844 | ||
13845 | if (die->parent->tag != DW_TAG_structure_type | |
13846 | && die->parent->tag != DW_TAG_union_type | |
13847 | && die->parent->tag != DW_TAG_class_type) | |
13848 | return 0; | |
13849 | ||
13850 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
13851 | type_name = dwarf2_name (die->parent, cu); |
13852 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
13853 | return 0; |
13854 | ||
13855 | len = strlen (fieldname); | |
fe978cb0 PA |
13856 | return (strncmp (fieldname, type_name, len) == 0 |
13857 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
13858 | } |
13859 | ||
c906108c SS |
13860 | /* Add a member function to the proper fieldlist. */ |
13861 | ||
13862 | static void | |
107d2387 | 13863 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13864 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 13865 | { |
e7c27a73 | 13866 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13867 | struct attribute *attr; |
13868 | struct fnfieldlist *flp; | |
13869 | int i; | |
13870 | struct fn_field *fnp; | |
15d034d0 | 13871 | const char *fieldname; |
c906108c | 13872 | struct nextfnfield *new_fnfield; |
f792889a | 13873 | struct type *this_type; |
60d5a603 | 13874 | enum dwarf_access_attribute accessibility; |
c906108c | 13875 | |
b4ba55a1 | 13876 | if (cu->language == language_ada) |
a73c6dcd | 13877 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 13878 | |
2df3850c | 13879 | /* Get name of member function. */ |
39cbfefa DJ |
13880 | fieldname = dwarf2_name (die, cu); |
13881 | if (fieldname == NULL) | |
2df3850c | 13882 | return; |
c906108c | 13883 | |
c906108c SS |
13884 | /* Look up member function name in fieldlist. */ |
13885 | for (i = 0; i < fip->nfnfields; i++) | |
13886 | { | |
27bfe10e | 13887 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
13888 | break; |
13889 | } | |
13890 | ||
13891 | /* Create new list element if necessary. */ | |
13892 | if (i < fip->nfnfields) | |
13893 | flp = &fip->fnfieldlists[i]; | |
13894 | else | |
13895 | { | |
13896 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13897 | { | |
13898 | fip->fnfieldlists = (struct fnfieldlist *) | |
13899 | xrealloc (fip->fnfieldlists, | |
13900 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13901 | * sizeof (struct fnfieldlist)); |
c906108c | 13902 | if (fip->nfnfields == 0) |
c13c43fd | 13903 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
13904 | } |
13905 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
13906 | flp->name = fieldname; | |
13907 | flp->length = 0; | |
13908 | flp->head = NULL; | |
3da10d80 | 13909 | i = fip->nfnfields++; |
c906108c SS |
13910 | } |
13911 | ||
13912 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 13913 | entry. */ |
8d749320 | 13914 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 13915 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
13916 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
13917 | new_fnfield->next = flp->head; | |
13918 | flp->head = new_fnfield; | |
13919 | flp->length++; | |
13920 | ||
13921 | /* Fill in the member function field info. */ | |
13922 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
13923 | |
13924 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 13925 | if (cu->language == language_cplus) |
3da10d80 KS |
13926 | { |
13927 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
13928 | die, cu); | |
13929 | } | |
13930 | else | |
13931 | { | |
1d06ead6 | 13932 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
13933 | fnp->physname = physname ? physname : ""; |
13934 | } | |
13935 | ||
c906108c | 13936 | fnp->type = alloc_type (objfile); |
f792889a DJ |
13937 | this_type = read_type_die (die, cu); |
13938 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 13939 | { |
f792889a | 13940 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 13941 | |
f792889a | 13942 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
13943 | of the method itself (TYPE_CODE_METHOD). */ |
13944 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
13945 | TYPE_TARGET_TYPE (this_type), |
13946 | TYPE_FIELDS (this_type), | |
13947 | TYPE_NFIELDS (this_type), | |
13948 | TYPE_VARARGS (this_type)); | |
c906108c SS |
13949 | |
13950 | /* Handle static member functions. | |
c5aa993b | 13951 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
13952 | member functions. G++ helps GDB by marking the first |
13953 | parameter for non-static member functions (which is the this | |
13954 | pointer) as artificial. We obtain this information from | |
13955 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 13956 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
13957 | fnp->voffset = VOFFSET_STATIC; |
13958 | } | |
13959 | else | |
e2e0b3e5 | 13960 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 13961 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
13962 | |
13963 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 13964 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 13965 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 13966 | |
3e43a32a MS |
13967 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
13968 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
13969 | |
13970 | /* Get accessibility. */ | |
e142c38c | 13971 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 13972 | if (attr) |
aead7601 | 13973 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
13974 | else |
13975 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13976 | switch (accessibility) | |
c906108c | 13977 | { |
60d5a603 JK |
13978 | case DW_ACCESS_private: |
13979 | fnp->is_private = 1; | |
13980 | break; | |
13981 | case DW_ACCESS_protected: | |
13982 | fnp->is_protected = 1; | |
13983 | break; | |
c906108c SS |
13984 | } |
13985 | ||
b02dede2 | 13986 | /* Check for artificial methods. */ |
e142c38c | 13987 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
13988 | if (attr && DW_UNSND (attr) != 0) |
13989 | fnp->is_artificial = 1; | |
13990 | ||
7d27a96d TT |
13991 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
13992 | ||
0d564a31 | 13993 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
13994 | function. For older versions of GCC, this is an offset in the |
13995 | appropriate virtual table, as specified by DW_AT_containing_type. | |
13996 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
13997 | to the object address. */ |
13998 | ||
e142c38c | 13999 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 14000 | if (attr) |
8e19ed76 | 14001 | { |
aec5aa8b | 14002 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14003 | { |
aec5aa8b TT |
14004 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14005 | { | |
14006 | /* Old-style GCC. */ | |
14007 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14008 | } | |
14009 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14010 | || (DW_BLOCK (attr)->size > 1 | |
14011 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14012 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14013 | { | |
aec5aa8b TT |
14014 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14015 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14016 | dwarf2_complex_location_expr_complaint (); | |
14017 | else | |
14018 | fnp->voffset /= cu->header.addr_size; | |
14019 | fnp->voffset += 2; | |
14020 | } | |
14021 | else | |
14022 | dwarf2_complex_location_expr_complaint (); | |
14023 | ||
14024 | if (!fnp->fcontext) | |
7e993ebf KS |
14025 | { |
14026 | /* If there is no `this' field and no DW_AT_containing_type, | |
14027 | we cannot actually find a base class context for the | |
14028 | vtable! */ | |
14029 | if (TYPE_NFIELDS (this_type) == 0 | |
14030 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14031 | { | |
14032 | complaint (&symfile_complaints, | |
14033 | _("cannot determine context for virtual member " | |
14034 | "function \"%s\" (offset %d)"), | |
9c541725 | 14035 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
14036 | } |
14037 | else | |
14038 | { | |
14039 | fnp->fcontext | |
14040 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14041 | } | |
14042 | } | |
aec5aa8b | 14043 | } |
3690dd37 | 14044 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 14045 | { |
4d3c2250 | 14046 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14047 | } |
14048 | else | |
14049 | { | |
4d3c2250 KB |
14050 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14051 | fieldname); | |
8e19ed76 | 14052 | } |
0d564a31 | 14053 | } |
d48cc9dd DJ |
14054 | else |
14055 | { | |
14056 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14057 | if (attr && DW_UNSND (attr)) | |
14058 | { | |
14059 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
14060 | complaint (&symfile_complaints, | |
3e43a32a MS |
14061 | _("Member function \"%s\" (offset %d) is virtual " |
14062 | "but the vtable offset is not specified"), | |
9c541725 | 14063 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 14064 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14065 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14066 | } | |
14067 | } | |
c906108c SS |
14068 | } |
14069 | ||
14070 | /* Create the vector of member function fields, and attach it to the type. */ | |
14071 | ||
14072 | static void | |
fba45db2 | 14073 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14074 | struct dwarf2_cu *cu) |
c906108c SS |
14075 | { |
14076 | struct fnfieldlist *flp; | |
c906108c SS |
14077 | int i; |
14078 | ||
b4ba55a1 | 14079 | if (cu->language == language_ada) |
a73c6dcd | 14080 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14081 | |
c906108c SS |
14082 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14083 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
14084 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
14085 | ||
14086 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
14087 | { | |
14088 | struct nextfnfield *nfp = flp->head; | |
14089 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
14090 | int k; | |
14091 | ||
14092 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
14093 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
14094 | fn_flp->fn_fields = (struct fn_field *) | |
14095 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
14096 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 14097 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
14098 | } |
14099 | ||
14100 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
14101 | } |
14102 | ||
1168df01 JB |
14103 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14104 | language, zero otherwise. */ | |
14105 | static int | |
14106 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14107 | { | |
14108 | static const char vptr[] = "_vptr"; | |
987504bb | 14109 | static const char vtable[] = "vtable"; |
1168df01 | 14110 | |
9c37b5ae TT |
14111 | /* Look for the C++ form of the vtable. */ |
14112 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14113 | return 1; |
14114 | ||
14115 | return 0; | |
14116 | } | |
14117 | ||
c0dd20ea | 14118 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14119 | functions, with the ABI-specified layout. If TYPE describes |
14120 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14121 | |
14122 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14123 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14124 | |
0b92b5bb TT |
14125 | static void |
14126 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14127 | { |
09e2d7c7 | 14128 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14129 | |
14130 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14131 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14132 | return; | |
c0dd20ea DJ |
14133 | |
14134 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14135 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14136 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14137 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14138 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14139 | return; | |
c0dd20ea DJ |
14140 | |
14141 | /* Find the type of the method. */ | |
0b92b5bb | 14142 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14143 | if (pfn_type == NULL |
14144 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14145 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14146 | return; |
c0dd20ea DJ |
14147 | |
14148 | /* Look for the "this" argument. */ | |
14149 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14150 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14151 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14152 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14153 | return; |
c0dd20ea | 14154 | |
09e2d7c7 | 14155 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14156 | new_type = alloc_type (objfile); |
09e2d7c7 | 14157 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14158 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14159 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14160 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14161 | } |
1168df01 | 14162 | |
685b1105 | 14163 | |
c906108c | 14164 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
14165 | (definition) to create a type for the structure or union. Fill in |
14166 | the type's name and general properties; the members will not be | |
83655187 DE |
14167 | processed until process_structure_scope. A symbol table entry for |
14168 | the type will also not be done until process_structure_scope (assuming | |
14169 | the type has a name). | |
c906108c | 14170 | |
c767944b DJ |
14171 | NOTE: we need to call these functions regardless of whether or not the |
14172 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 14173 | structure or union. This gets the type entered into our set of |
83655187 | 14174 | user defined types. */ |
c906108c | 14175 | |
f792889a | 14176 | static struct type * |
134d01f1 | 14177 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14178 | { |
e7c27a73 | 14179 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14180 | struct type *type; |
14181 | struct attribute *attr; | |
15d034d0 | 14182 | const char *name; |
c906108c | 14183 | |
348e048f DE |
14184 | /* If the definition of this type lives in .debug_types, read that type. |
14185 | Don't follow DW_AT_specification though, that will take us back up | |
14186 | the chain and we want to go down. */ | |
45e58e77 | 14187 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14188 | if (attr) |
14189 | { | |
ac9ec31b | 14190 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14191 | |
ac9ec31b | 14192 | /* The type's CU may not be the same as CU. |
02142a6c | 14193 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14194 | return set_die_type (die, type, cu); |
14195 | } | |
14196 | ||
c0dd20ea | 14197 | type = alloc_type (objfile); |
c906108c | 14198 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 14199 | |
39cbfefa DJ |
14200 | name = dwarf2_name (die, cu); |
14201 | if (name != NULL) | |
c906108c | 14202 | { |
987504bb | 14203 | if (cu->language == language_cplus |
c44af4eb TT |
14204 | || cu->language == language_d |
14205 | || cu->language == language_rust) | |
63d06c5c | 14206 | { |
15d034d0 | 14207 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
14208 | |
14209 | /* dwarf2_full_name might have already finished building the DIE's | |
14210 | type. If so, there is no need to continue. */ | |
14211 | if (get_die_type (die, cu) != NULL) | |
14212 | return get_die_type (die, cu); | |
14213 | ||
14214 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
14215 | if (die->tag == DW_TAG_structure_type |
14216 | || die->tag == DW_TAG_class_type) | |
14217 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
14218 | } |
14219 | else | |
14220 | { | |
d8151005 DJ |
14221 | /* The name is already allocated along with this objfile, so |
14222 | we don't need to duplicate it for the type. */ | |
7d455152 | 14223 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
14224 | if (die->tag == DW_TAG_class_type) |
14225 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 14226 | } |
c906108c SS |
14227 | } |
14228 | ||
14229 | if (die->tag == DW_TAG_structure_type) | |
14230 | { | |
14231 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
14232 | } | |
14233 | else if (die->tag == DW_TAG_union_type) | |
14234 | { | |
14235 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
14236 | } | |
14237 | else | |
14238 | { | |
4753d33b | 14239 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
14240 | } |
14241 | ||
0cc2414c TT |
14242 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
14243 | TYPE_DECLARED_CLASS (type) = 1; | |
14244 | ||
e142c38c | 14245 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14246 | if (attr) |
14247 | { | |
155bfbd3 JB |
14248 | if (attr_form_is_constant (attr)) |
14249 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14250 | else | |
14251 | { | |
14252 | /* For the moment, dynamic type sizes are not supported | |
14253 | by GDB's struct type. The actual size is determined | |
14254 | on-demand when resolving the type of a given object, | |
14255 | so set the type's length to zero for now. Otherwise, | |
14256 | we record an expression as the length, and that expression | |
14257 | could lead to a very large value, which could eventually | |
14258 | lead to us trying to allocate that much memory when creating | |
14259 | a value of that type. */ | |
14260 | TYPE_LENGTH (type) = 0; | |
14261 | } | |
c906108c SS |
14262 | } |
14263 | else | |
14264 | { | |
14265 | TYPE_LENGTH (type) = 0; | |
14266 | } | |
14267 | ||
5230b05a | 14268 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 14269 | { |
5230b05a WT |
14270 | /* ICC<14 does not output the required DW_AT_declaration on |
14271 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 14272 | TYPE_STUB (type) = 1; |
685b1105 JK |
14273 | } |
14274 | else | |
14275 | TYPE_STUB_SUPPORTED (type) = 1; | |
14276 | ||
dc718098 | 14277 | if (die_is_declaration (die, cu)) |
876cecd0 | 14278 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
14279 | else if (attr == NULL && die->child == NULL |
14280 | && producer_is_realview (cu->producer)) | |
14281 | /* RealView does not output the required DW_AT_declaration | |
14282 | on incomplete types. */ | |
14283 | TYPE_STUB (type) = 1; | |
dc718098 | 14284 | |
c906108c SS |
14285 | /* We need to add the type field to the die immediately so we don't |
14286 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 14287 | type within the structure itself. */ |
1c379e20 | 14288 | set_die_type (die, type, cu); |
c906108c | 14289 | |
7e314c57 JK |
14290 | /* set_die_type should be already done. */ |
14291 | set_descriptive_type (type, die, cu); | |
14292 | ||
c767944b DJ |
14293 | return type; |
14294 | } | |
14295 | ||
14296 | /* Finish creating a structure or union type, including filling in | |
14297 | its members and creating a symbol for it. */ | |
14298 | ||
14299 | static void | |
14300 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14301 | { | |
14302 | struct objfile *objfile = cu->objfile; | |
ca040673 | 14303 | struct die_info *child_die; |
c767944b DJ |
14304 | struct type *type; |
14305 | ||
14306 | type = get_die_type (die, cu); | |
14307 | if (type == NULL) | |
14308 | type = read_structure_type (die, cu); | |
14309 | ||
e142c38c | 14310 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
14311 | { |
14312 | struct field_info fi; | |
2f4732b0 | 14313 | std::vector<struct symbol *> template_args; |
c767944b | 14314 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
14315 | |
14316 | memset (&fi, 0, sizeof (struct field_info)); | |
14317 | ||
639d11d3 | 14318 | child_die = die->child; |
c906108c SS |
14319 | |
14320 | while (child_die && child_die->tag) | |
14321 | { | |
a9a9bd0f DC |
14322 | if (child_die->tag == DW_TAG_member |
14323 | || child_die->tag == DW_TAG_variable) | |
c906108c | 14324 | { |
a9a9bd0f DC |
14325 | /* NOTE: carlton/2002-11-05: A C++ static data member |
14326 | should be a DW_TAG_member that is a declaration, but | |
14327 | all versions of G++ as of this writing (so through at | |
14328 | least 3.2.1) incorrectly generate DW_TAG_variable | |
14329 | tags for them instead. */ | |
e7c27a73 | 14330 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14331 | } |
8713b1b1 | 14332 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 14333 | { |
e98c9e7c TT |
14334 | /* Rust doesn't have member functions in the C++ sense. |
14335 | However, it does emit ordinary functions as children | |
14336 | of a struct DIE. */ | |
14337 | if (cu->language == language_rust) | |
14338 | read_func_scope (child_die, cu); | |
14339 | else | |
14340 | { | |
14341 | /* C++ member function. */ | |
14342 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
14343 | } | |
c906108c SS |
14344 | } |
14345 | else if (child_die->tag == DW_TAG_inheritance) | |
14346 | { | |
14347 | /* C++ base class field. */ | |
e7c27a73 | 14348 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 14349 | } |
98751a41 JK |
14350 | else if (child_die->tag == DW_TAG_typedef) |
14351 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
14352 | else if (child_die->tag == DW_TAG_template_type_param |
14353 | || child_die->tag == DW_TAG_template_value_param) | |
14354 | { | |
14355 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
14356 | ||
f1078f66 | 14357 | if (arg != NULL) |
2f4732b0 | 14358 | template_args.push_back (arg); |
34eaf542 TT |
14359 | } |
14360 | ||
c906108c SS |
14361 | child_die = sibling_die (child_die); |
14362 | } | |
14363 | ||
34eaf542 | 14364 | /* Attach template arguments to type. */ |
2f4732b0 | 14365 | if (!template_args.empty ()) |
34eaf542 TT |
14366 | { |
14367 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
2f4732b0 | 14368 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 14369 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
14370 | = XOBNEWVEC (&objfile->objfile_obstack, |
14371 | struct symbol *, | |
14372 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 14373 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 14374 | template_args.data (), |
34eaf542 TT |
14375 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
14376 | * sizeof (struct symbol *))); | |
34eaf542 TT |
14377 | } |
14378 | ||
c906108c SS |
14379 | /* Attach fields and member functions to the type. */ |
14380 | if (fi.nfields) | |
e7c27a73 | 14381 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
14382 | if (fi.nfnfields) |
14383 | { | |
e7c27a73 | 14384 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 14385 | |
c5aa993b | 14386 | /* Get the type which refers to the base class (possibly this |
c906108c | 14387 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
14388 | class from the DW_AT_containing_type attribute. This use of |
14389 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 14390 | |
e142c38c | 14391 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 14392 | { |
e7c27a73 | 14393 | struct type *t = die_containing_type (die, cu); |
c906108c | 14394 | |
ae6ae975 | 14395 | set_type_vptr_basetype (type, t); |
c906108c SS |
14396 | if (type == t) |
14397 | { | |
c906108c SS |
14398 | int i; |
14399 | ||
14400 | /* Our own class provides vtbl ptr. */ | |
14401 | for (i = TYPE_NFIELDS (t) - 1; | |
14402 | i >= TYPE_N_BASECLASSES (t); | |
14403 | --i) | |
14404 | { | |
0d5cff50 | 14405 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 14406 | |
1168df01 | 14407 | if (is_vtable_name (fieldname, cu)) |
c906108c | 14408 | { |
ae6ae975 | 14409 | set_type_vptr_fieldno (type, i); |
c906108c SS |
14410 | break; |
14411 | } | |
14412 | } | |
14413 | ||
14414 | /* Complain if virtual function table field not found. */ | |
14415 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 14416 | complaint (&symfile_complaints, |
3e43a32a MS |
14417 | _("virtual function table pointer " |
14418 | "not found when defining class '%s'"), | |
4d3c2250 KB |
14419 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
14420 | ""); | |
c906108c SS |
14421 | } |
14422 | else | |
14423 | { | |
ae6ae975 | 14424 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
14425 | } |
14426 | } | |
f6235d4c | 14427 | else if (cu->producer |
61012eef | 14428 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
14429 | { |
14430 | /* The IBM XLC compiler does not provide direct indication | |
14431 | of the containing type, but the vtable pointer is | |
14432 | always named __vfp. */ | |
14433 | ||
14434 | int i; | |
14435 | ||
14436 | for (i = TYPE_NFIELDS (type) - 1; | |
14437 | i >= TYPE_N_BASECLASSES (type); | |
14438 | --i) | |
14439 | { | |
14440 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
14441 | { | |
ae6ae975 DE |
14442 | set_type_vptr_fieldno (type, i); |
14443 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
14444 | break; |
14445 | } | |
14446 | } | |
14447 | } | |
c906108c | 14448 | } |
98751a41 JK |
14449 | |
14450 | /* Copy fi.typedef_field_list linked list elements content into the | |
14451 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
14452 | if (fi.typedef_field_list) | |
14453 | { | |
14454 | int i = fi.typedef_field_list_count; | |
14455 | ||
a0d7a4ff | 14456 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 14457 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
14458 | = ((struct typedef_field *) |
14459 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
14460 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
14461 | ||
14462 | /* Reverse the list order to keep the debug info elements order. */ | |
14463 | while (--i >= 0) | |
14464 | { | |
14465 | struct typedef_field *dest, *src; | |
6e70227d | 14466 | |
98751a41 JK |
14467 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
14468 | src = &fi.typedef_field_list->field; | |
14469 | fi.typedef_field_list = fi.typedef_field_list->next; | |
14470 | *dest = *src; | |
14471 | } | |
14472 | } | |
c767944b DJ |
14473 | |
14474 | do_cleanups (back_to); | |
c906108c | 14475 | } |
63d06c5c | 14476 | |
bb5ed363 | 14477 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 14478 | |
90aeadfc DC |
14479 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
14480 | snapshots) has been known to create a die giving a declaration | |
14481 | for a class that has, as a child, a die giving a definition for a | |
14482 | nested class. So we have to process our children even if the | |
14483 | current die is a declaration. Normally, of course, a declaration | |
14484 | won't have any children at all. */ | |
134d01f1 | 14485 | |
ca040673 DE |
14486 | child_die = die->child; |
14487 | ||
90aeadfc DC |
14488 | while (child_die != NULL && child_die->tag) |
14489 | { | |
14490 | if (child_die->tag == DW_TAG_member | |
14491 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
14492 | || child_die->tag == DW_TAG_inheritance |
14493 | || child_die->tag == DW_TAG_template_value_param | |
14494 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 14495 | { |
90aeadfc | 14496 | /* Do nothing. */ |
134d01f1 | 14497 | } |
90aeadfc DC |
14498 | else |
14499 | process_die (child_die, cu); | |
134d01f1 | 14500 | |
90aeadfc | 14501 | child_die = sibling_die (child_die); |
134d01f1 DJ |
14502 | } |
14503 | ||
fa4028e9 JB |
14504 | /* Do not consider external references. According to the DWARF standard, |
14505 | these DIEs are identified by the fact that they have no byte_size | |
14506 | attribute, and a declaration attribute. */ | |
14507 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
14508 | || !die_is_declaration (die, cu)) | |
c767944b | 14509 | new_symbol (die, type, cu); |
134d01f1 DJ |
14510 | } |
14511 | ||
55426c9d JB |
14512 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
14513 | update TYPE using some information only available in DIE's children. */ | |
14514 | ||
14515 | static void | |
14516 | update_enumeration_type_from_children (struct die_info *die, | |
14517 | struct type *type, | |
14518 | struct dwarf2_cu *cu) | |
14519 | { | |
60f7655a | 14520 | struct die_info *child_die; |
55426c9d JB |
14521 | int unsigned_enum = 1; |
14522 | int flag_enum = 1; | |
14523 | ULONGEST mask = 0; | |
55426c9d | 14524 | |
8268c778 | 14525 | auto_obstack obstack; |
55426c9d | 14526 | |
60f7655a DE |
14527 | for (child_die = die->child; |
14528 | child_die != NULL && child_die->tag; | |
14529 | child_die = sibling_die (child_die)) | |
55426c9d JB |
14530 | { |
14531 | struct attribute *attr; | |
14532 | LONGEST value; | |
14533 | const gdb_byte *bytes; | |
14534 | struct dwarf2_locexpr_baton *baton; | |
14535 | const char *name; | |
60f7655a | 14536 | |
55426c9d JB |
14537 | if (child_die->tag != DW_TAG_enumerator) |
14538 | continue; | |
14539 | ||
14540 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
14541 | if (attr == NULL) | |
14542 | continue; | |
14543 | ||
14544 | name = dwarf2_name (child_die, cu); | |
14545 | if (name == NULL) | |
14546 | name = "<anonymous enumerator>"; | |
14547 | ||
14548 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
14549 | &value, &bytes, &baton); | |
14550 | if (value < 0) | |
14551 | { | |
14552 | unsigned_enum = 0; | |
14553 | flag_enum = 0; | |
14554 | } | |
14555 | else if ((mask & value) != 0) | |
14556 | flag_enum = 0; | |
14557 | else | |
14558 | mask |= value; | |
14559 | ||
14560 | /* If we already know that the enum type is neither unsigned, nor | |
14561 | a flag type, no need to look at the rest of the enumerates. */ | |
14562 | if (!unsigned_enum && !flag_enum) | |
14563 | break; | |
55426c9d JB |
14564 | } |
14565 | ||
14566 | if (unsigned_enum) | |
14567 | TYPE_UNSIGNED (type) = 1; | |
14568 | if (flag_enum) | |
14569 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
14570 | } |
14571 | ||
134d01f1 DJ |
14572 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
14573 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 14574 | |
f792889a | 14575 | static struct type * |
134d01f1 | 14576 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14577 | { |
e7c27a73 | 14578 | struct objfile *objfile = cu->objfile; |
c906108c | 14579 | struct type *type; |
c906108c | 14580 | struct attribute *attr; |
0114d602 | 14581 | const char *name; |
134d01f1 | 14582 | |
348e048f DE |
14583 | /* If the definition of this type lives in .debug_types, read that type. |
14584 | Don't follow DW_AT_specification though, that will take us back up | |
14585 | the chain and we want to go down. */ | |
45e58e77 | 14586 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14587 | if (attr) |
14588 | { | |
ac9ec31b | 14589 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14590 | |
ac9ec31b | 14591 | /* The type's CU may not be the same as CU. |
02142a6c | 14592 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14593 | return set_die_type (die, type, cu); |
14594 | } | |
14595 | ||
c906108c SS |
14596 | type = alloc_type (objfile); |
14597 | ||
14598 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14599 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14600 | if (name != NULL) |
7d455152 | 14601 | TYPE_TAG_NAME (type) = name; |
c906108c | 14602 | |
0626fc76 TT |
14603 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14604 | if (attr != NULL) | |
14605 | { | |
14606 | struct type *underlying_type = die_type (die, cu); | |
14607 | ||
14608 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14609 | } | |
14610 | ||
e142c38c | 14611 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14612 | if (attr) |
14613 | { | |
14614 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14615 | } | |
14616 | else | |
14617 | { | |
14618 | TYPE_LENGTH (type) = 0; | |
14619 | } | |
14620 | ||
137033e9 JB |
14621 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14622 | declared as private in the package spec, and then defined only | |
14623 | inside the package body. Such types are known as Taft Amendment | |
14624 | Types. When another package uses such a type, an incomplete DIE | |
14625 | may be generated by the compiler. */ | |
02eb380e | 14626 | if (die_is_declaration (die, cu)) |
876cecd0 | 14627 | TYPE_STUB (type) = 1; |
02eb380e | 14628 | |
0626fc76 TT |
14629 | /* Finish the creation of this type by using the enum's children. |
14630 | We must call this even when the underlying type has been provided | |
14631 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14632 | update_enumeration_type_from_children (die, type, cu); |
14633 | ||
0626fc76 TT |
14634 | /* If this type has an underlying type that is not a stub, then we |
14635 | may use its attributes. We always use the "unsigned" attribute | |
14636 | in this situation, because ordinarily we guess whether the type | |
14637 | is unsigned -- but the guess can be wrong and the underlying type | |
14638 | can tell us the reality. However, we defer to a local size | |
14639 | attribute if one exists, because this lets the compiler override | |
14640 | the underlying type if needed. */ | |
14641 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14642 | { | |
14643 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14644 | if (TYPE_LENGTH (type) == 0) | |
14645 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14646 | } | |
14647 | ||
3d567982 TT |
14648 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14649 | ||
f792889a | 14650 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14651 | } |
14652 | ||
14653 | /* Given a pointer to a die which begins an enumeration, process all | |
14654 | the dies that define the members of the enumeration, and create the | |
14655 | symbol for the enumeration type. | |
14656 | ||
14657 | NOTE: We reverse the order of the element list. */ | |
14658 | ||
14659 | static void | |
14660 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14661 | { | |
f792889a | 14662 | struct type *this_type; |
134d01f1 | 14663 | |
f792889a DJ |
14664 | this_type = get_die_type (die, cu); |
14665 | if (this_type == NULL) | |
14666 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 14667 | |
639d11d3 | 14668 | if (die->child != NULL) |
c906108c | 14669 | { |
9dc481d3 DE |
14670 | struct die_info *child_die; |
14671 | struct symbol *sym; | |
14672 | struct field *fields = NULL; | |
14673 | int num_fields = 0; | |
15d034d0 | 14674 | const char *name; |
9dc481d3 | 14675 | |
639d11d3 | 14676 | child_die = die->child; |
c906108c SS |
14677 | while (child_die && child_die->tag) |
14678 | { | |
14679 | if (child_die->tag != DW_TAG_enumerator) | |
14680 | { | |
e7c27a73 | 14681 | process_die (child_die, cu); |
c906108c SS |
14682 | } |
14683 | else | |
14684 | { | |
39cbfefa DJ |
14685 | name = dwarf2_name (child_die, cu); |
14686 | if (name) | |
c906108c | 14687 | { |
f792889a | 14688 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
14689 | |
14690 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14691 | { | |
14692 | fields = (struct field *) | |
14693 | xrealloc (fields, | |
14694 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14695 | * sizeof (struct field)); |
c906108c SS |
14696 | } |
14697 | ||
3567439c | 14698 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 14699 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 14700 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
14701 | FIELD_BITSIZE (fields[num_fields]) = 0; |
14702 | ||
14703 | num_fields++; | |
14704 | } | |
14705 | } | |
14706 | ||
14707 | child_die = sibling_die (child_die); | |
14708 | } | |
14709 | ||
14710 | if (num_fields) | |
14711 | { | |
f792889a DJ |
14712 | TYPE_NFIELDS (this_type) = num_fields; |
14713 | TYPE_FIELDS (this_type) = (struct field *) | |
14714 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
14715 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 14716 | sizeof (struct field) * num_fields); |
b8c9b27d | 14717 | xfree (fields); |
c906108c | 14718 | } |
c906108c | 14719 | } |
134d01f1 | 14720 | |
6c83ed52 TT |
14721 | /* If we are reading an enum from a .debug_types unit, and the enum |
14722 | is a declaration, and the enum is not the signatured type in the | |
14723 | unit, then we do not want to add a symbol for it. Adding a | |
14724 | symbol would in some cases obscure the true definition of the | |
14725 | enum, giving users an incomplete type when the definition is | |
14726 | actually available. Note that we do not want to do this for all | |
14727 | enums which are just declarations, because C++0x allows forward | |
14728 | enum declarations. */ | |
3019eac3 | 14729 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
14730 | && die_is_declaration (die, cu)) |
14731 | { | |
52dc124a | 14732 | struct signatured_type *sig_type; |
6c83ed52 | 14733 | |
c0f78cd4 | 14734 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
14735 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
14736 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
14737 | return; |
14738 | } | |
14739 | ||
f792889a | 14740 | new_symbol (die, this_type, cu); |
c906108c SS |
14741 | } |
14742 | ||
14743 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
14744 | the DIE's type field. For now, this only handles one dimensional | |
14745 | arrays. */ | |
14746 | ||
f792889a | 14747 | static struct type * |
e7c27a73 | 14748 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14749 | { |
e7c27a73 | 14750 | struct objfile *objfile = cu->objfile; |
c906108c | 14751 | struct die_info *child_die; |
7e314c57 | 14752 | struct type *type; |
c906108c | 14753 | struct type *element_type, *range_type, *index_type; |
c906108c | 14754 | struct attribute *attr; |
15d034d0 | 14755 | const char *name; |
dc53a7ad | 14756 | unsigned int bit_stride = 0; |
c906108c | 14757 | |
e7c27a73 | 14758 | element_type = die_type (die, cu); |
c906108c | 14759 | |
7e314c57 JK |
14760 | /* The die_type call above may have already set the type for this DIE. */ |
14761 | type = get_die_type (die, cu); | |
14762 | if (type) | |
14763 | return type; | |
14764 | ||
dc53a7ad JB |
14765 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
14766 | if (attr != NULL) | |
14767 | bit_stride = DW_UNSND (attr) * 8; | |
14768 | ||
14769 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
14770 | if (attr != NULL) | |
14771 | bit_stride = DW_UNSND (attr); | |
14772 | ||
c906108c SS |
14773 | /* Irix 6.2 native cc creates array types without children for |
14774 | arrays with unspecified length. */ | |
639d11d3 | 14775 | if (die->child == NULL) |
c906108c | 14776 | { |
46bf5051 | 14777 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14778 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
14779 | type = create_array_type_with_stride (NULL, element_type, range_type, |
14780 | bit_stride); | |
f792889a | 14781 | return set_die_type (die, type, cu); |
c906108c SS |
14782 | } |
14783 | ||
791afaa2 | 14784 | std::vector<struct type *> range_types; |
639d11d3 | 14785 | child_die = die->child; |
c906108c SS |
14786 | while (child_die && child_die->tag) |
14787 | { | |
14788 | if (child_die->tag == DW_TAG_subrange_type) | |
14789 | { | |
f792889a | 14790 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 14791 | |
f792889a | 14792 | if (child_type != NULL) |
a02abb62 | 14793 | { |
0963b4bd MS |
14794 | /* The range type was succesfully read. Save it for the |
14795 | array type creation. */ | |
791afaa2 | 14796 | range_types.push_back (child_type); |
a02abb62 | 14797 | } |
c906108c SS |
14798 | } |
14799 | child_die = sibling_die (child_die); | |
14800 | } | |
14801 | ||
14802 | /* Dwarf2 dimensions are output from left to right, create the | |
14803 | necessary array types in backwards order. */ | |
7ca2d3a3 | 14804 | |
c906108c | 14805 | type = element_type; |
7ca2d3a3 DL |
14806 | |
14807 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
14808 | { | |
14809 | int i = 0; | |
9a619af0 | 14810 | |
791afaa2 | 14811 | while (i < range_types.size ()) |
dc53a7ad JB |
14812 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
14813 | bit_stride); | |
7ca2d3a3 DL |
14814 | } |
14815 | else | |
14816 | { | |
791afaa2 | 14817 | size_t ndim = range_types.size (); |
7ca2d3a3 | 14818 | while (ndim-- > 0) |
dc53a7ad JB |
14819 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
14820 | bit_stride); | |
7ca2d3a3 | 14821 | } |
c906108c | 14822 | |
f5f8a009 EZ |
14823 | /* Understand Dwarf2 support for vector types (like they occur on |
14824 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
14825 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
14826 | custom vendor extension. The main difference between a regular | |
14827 | array and the vector variant is that vectors are passed by value | |
14828 | to functions. */ | |
e142c38c | 14829 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 14830 | if (attr) |
ea37ba09 | 14831 | make_vector_type (type); |
f5f8a009 | 14832 | |
dbc98a8b KW |
14833 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
14834 | implementation may choose to implement triple vectors using this | |
14835 | attribute. */ | |
14836 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
14837 | if (attr) | |
14838 | { | |
14839 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
14840 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14841 | else | |
3e43a32a MS |
14842 | complaint (&symfile_complaints, |
14843 | _("DW_AT_byte_size for array type smaller " | |
14844 | "than the total size of elements")); | |
dbc98a8b KW |
14845 | } |
14846 | ||
39cbfefa DJ |
14847 | name = dwarf2_name (die, cu); |
14848 | if (name) | |
14849 | TYPE_NAME (type) = name; | |
6e70227d | 14850 | |
0963b4bd | 14851 | /* Install the type in the die. */ |
7e314c57 JK |
14852 | set_die_type (die, type, cu); |
14853 | ||
14854 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14855 | set_descriptive_type (type, die, cu); |
14856 | ||
7e314c57 | 14857 | return type; |
c906108c SS |
14858 | } |
14859 | ||
7ca2d3a3 | 14860 | static enum dwarf_array_dim_ordering |
6e70227d | 14861 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
14862 | { |
14863 | struct attribute *attr; | |
14864 | ||
14865 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
14866 | ||
aead7601 SM |
14867 | if (attr) |
14868 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 14869 | |
0963b4bd MS |
14870 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
14871 | opposite order to the dwarf2 specification, but data is still | |
14872 | laid out as per normal fortran. | |
7ca2d3a3 | 14873 | |
0963b4bd MS |
14874 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
14875 | version checking. */ | |
7ca2d3a3 | 14876 | |
905e0470 PM |
14877 | if (cu->language == language_fortran |
14878 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
14879 | { |
14880 | return DW_ORD_row_major; | |
14881 | } | |
14882 | ||
6e70227d | 14883 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
14884 | { |
14885 | case array_column_major: | |
14886 | return DW_ORD_col_major; | |
14887 | case array_row_major: | |
14888 | default: | |
14889 | return DW_ORD_row_major; | |
14890 | }; | |
14891 | } | |
14892 | ||
72019c9c | 14893 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 14894 | the DIE's type field. */ |
72019c9c | 14895 | |
f792889a | 14896 | static struct type * |
72019c9c GM |
14897 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
14898 | { | |
7e314c57 JK |
14899 | struct type *domain_type, *set_type; |
14900 | struct attribute *attr; | |
f792889a | 14901 | |
7e314c57 JK |
14902 | domain_type = die_type (die, cu); |
14903 | ||
14904 | /* The die_type call above may have already set the type for this DIE. */ | |
14905 | set_type = get_die_type (die, cu); | |
14906 | if (set_type) | |
14907 | return set_type; | |
14908 | ||
14909 | set_type = create_set_type (NULL, domain_type); | |
14910 | ||
14911 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
14912 | if (attr) |
14913 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 14914 | |
f792889a | 14915 | return set_die_type (die, set_type, cu); |
72019c9c | 14916 | } |
7ca2d3a3 | 14917 | |
0971de02 TT |
14918 | /* A helper for read_common_block that creates a locexpr baton. |
14919 | SYM is the symbol which we are marking as computed. | |
14920 | COMMON_DIE is the DIE for the common block. | |
14921 | COMMON_LOC is the location expression attribute for the common | |
14922 | block itself. | |
14923 | MEMBER_LOC is the location expression attribute for the particular | |
14924 | member of the common block that we are processing. | |
14925 | CU is the CU from which the above come. */ | |
14926 | ||
14927 | static void | |
14928 | mark_common_block_symbol_computed (struct symbol *sym, | |
14929 | struct die_info *common_die, | |
14930 | struct attribute *common_loc, | |
14931 | struct attribute *member_loc, | |
14932 | struct dwarf2_cu *cu) | |
14933 | { | |
14934 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14935 | struct dwarf2_locexpr_baton *baton; | |
14936 | gdb_byte *ptr; | |
14937 | unsigned int cu_off; | |
14938 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
14939 | LONGEST offset = 0; | |
14940 | ||
14941 | gdb_assert (common_loc && member_loc); | |
14942 | gdb_assert (attr_form_is_block (common_loc)); | |
14943 | gdb_assert (attr_form_is_block (member_loc) | |
14944 | || attr_form_is_constant (member_loc)); | |
14945 | ||
8d749320 | 14946 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
14947 | baton->per_cu = cu->per_cu; |
14948 | gdb_assert (baton->per_cu); | |
14949 | ||
14950 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
14951 | ||
14952 | if (attr_form_is_constant (member_loc)) | |
14953 | { | |
14954 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
14955 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
14956 | } | |
14957 | else | |
14958 | baton->size += DW_BLOCK (member_loc)->size; | |
14959 | ||
224c3ddb | 14960 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
14961 | baton->data = ptr; |
14962 | ||
14963 | *ptr++ = DW_OP_call4; | |
9c541725 | 14964 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
14965 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
14966 | ptr += 4; | |
14967 | ||
14968 | if (attr_form_is_constant (member_loc)) | |
14969 | { | |
14970 | *ptr++ = DW_OP_addr; | |
14971 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
14972 | ptr += cu->header.addr_size; | |
14973 | } | |
14974 | else | |
14975 | { | |
14976 | /* We have to copy the data here, because DW_OP_call4 will only | |
14977 | use a DW_AT_location attribute. */ | |
14978 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
14979 | ptr += DW_BLOCK (member_loc)->size; | |
14980 | } | |
14981 | ||
14982 | *ptr++ = DW_OP_plus; | |
14983 | gdb_assert (ptr - baton->data == baton->size); | |
14984 | ||
0971de02 | 14985 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 14986 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
14987 | } |
14988 | ||
4357ac6c TT |
14989 | /* Create appropriate locally-scoped variables for all the |
14990 | DW_TAG_common_block entries. Also create a struct common_block | |
14991 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
14992 | is used to sepate the common blocks name namespace from regular | |
14993 | variable names. */ | |
c906108c SS |
14994 | |
14995 | static void | |
e7c27a73 | 14996 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14997 | { |
0971de02 TT |
14998 | struct attribute *attr; |
14999 | ||
15000 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
15001 | if (attr) | |
15002 | { | |
15003 | /* Support the .debug_loc offsets. */ | |
15004 | if (attr_form_is_block (attr)) | |
15005 | { | |
15006 | /* Ok. */ | |
15007 | } | |
15008 | else if (attr_form_is_section_offset (attr)) | |
15009 | { | |
15010 | dwarf2_complex_location_expr_complaint (); | |
15011 | attr = NULL; | |
15012 | } | |
15013 | else | |
15014 | { | |
15015 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15016 | "common block member"); | |
15017 | attr = NULL; | |
15018 | } | |
15019 | } | |
15020 | ||
639d11d3 | 15021 | if (die->child != NULL) |
c906108c | 15022 | { |
4357ac6c TT |
15023 | struct objfile *objfile = cu->objfile; |
15024 | struct die_info *child_die; | |
15025 | size_t n_entries = 0, size; | |
15026 | struct common_block *common_block; | |
15027 | struct symbol *sym; | |
74ac6d43 | 15028 | |
4357ac6c TT |
15029 | for (child_die = die->child; |
15030 | child_die && child_die->tag; | |
15031 | child_die = sibling_die (child_die)) | |
15032 | ++n_entries; | |
15033 | ||
15034 | size = (sizeof (struct common_block) | |
15035 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
15036 | common_block |
15037 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
15038 | size); | |
4357ac6c TT |
15039 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
15040 | common_block->n_entries = 0; | |
15041 | ||
15042 | for (child_die = die->child; | |
15043 | child_die && child_die->tag; | |
15044 | child_die = sibling_die (child_die)) | |
15045 | { | |
15046 | /* Create the symbol in the DW_TAG_common_block block in the current | |
15047 | symbol scope. */ | |
e7c27a73 | 15048 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
15049 | if (sym != NULL) |
15050 | { | |
15051 | struct attribute *member_loc; | |
15052 | ||
15053 | common_block->contents[common_block->n_entries++] = sym; | |
15054 | ||
15055 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
15056 | cu); | |
15057 | if (member_loc) | |
15058 | { | |
15059 | /* GDB has handled this for a long time, but it is | |
15060 | not specified by DWARF. It seems to have been | |
15061 | emitted by gfortran at least as recently as: | |
15062 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
15063 | complaint (&symfile_complaints, | |
15064 | _("Variable in common block has " | |
15065 | "DW_AT_data_member_location " | |
15066 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15067 | to_underlying (child_die->sect_off), |
4262abfb | 15068 | objfile_name (cu->objfile)); |
0971de02 TT |
15069 | |
15070 | if (attr_form_is_section_offset (member_loc)) | |
15071 | dwarf2_complex_location_expr_complaint (); | |
15072 | else if (attr_form_is_constant (member_loc) | |
15073 | || attr_form_is_block (member_loc)) | |
15074 | { | |
15075 | if (attr) | |
15076 | mark_common_block_symbol_computed (sym, die, attr, | |
15077 | member_loc, cu); | |
15078 | } | |
15079 | else | |
15080 | dwarf2_complex_location_expr_complaint (); | |
15081 | } | |
15082 | } | |
c906108c | 15083 | } |
4357ac6c TT |
15084 | |
15085 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
15086 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
15087 | } |
15088 | } | |
15089 | ||
0114d602 | 15090 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 15091 | |
0114d602 DJ |
15092 | static struct type * |
15093 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 15094 | { |
e7c27a73 | 15095 | struct objfile *objfile = cu->objfile; |
0114d602 | 15096 | const char *previous_prefix, *name; |
9219021c | 15097 | int is_anonymous; |
0114d602 DJ |
15098 | struct type *type; |
15099 | ||
15100 | /* For extensions, reuse the type of the original namespace. */ | |
15101 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
15102 | { | |
15103 | struct die_info *ext_die; | |
15104 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 15105 | |
0114d602 DJ |
15106 | ext_die = dwarf2_extension (die, &ext_cu); |
15107 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
15108 | |
15109 | /* EXT_CU may not be the same as CU. | |
02142a6c | 15110 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
15111 | return set_die_type (die, type, cu); |
15112 | } | |
9219021c | 15113 | |
e142c38c | 15114 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
15115 | |
15116 | /* Now build the name of the current namespace. */ | |
15117 | ||
0114d602 DJ |
15118 | previous_prefix = determine_prefix (die, cu); |
15119 | if (previous_prefix[0] != '\0') | |
15120 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 15121 | previous_prefix, name, 0, cu); |
0114d602 DJ |
15122 | |
15123 | /* Create the type. */ | |
19f392bc | 15124 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
15125 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
15126 | ||
60531b24 | 15127 | return set_die_type (die, type, cu); |
0114d602 DJ |
15128 | } |
15129 | ||
22cee43f | 15130 | /* Read a namespace scope. */ |
0114d602 DJ |
15131 | |
15132 | static void | |
15133 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
15134 | { | |
15135 | struct objfile *objfile = cu->objfile; | |
0114d602 | 15136 | int is_anonymous; |
9219021c | 15137 | |
5c4e30ca DC |
15138 | /* Add a symbol associated to this if we haven't seen the namespace |
15139 | before. Also, add a using directive if it's an anonymous | |
15140 | namespace. */ | |
9219021c | 15141 | |
f2f0e013 | 15142 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
15143 | { |
15144 | struct type *type; | |
15145 | ||
0114d602 | 15146 | type = read_type_die (die, cu); |
e7c27a73 | 15147 | new_symbol (die, type, cu); |
5c4e30ca | 15148 | |
e8e80198 | 15149 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 15150 | if (is_anonymous) |
0114d602 DJ |
15151 | { |
15152 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 15153 | |
eb1e02fd | 15154 | std::vector<const char *> excludes; |
22cee43f PMR |
15155 | add_using_directive (using_directives (cu->language), |
15156 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 15157 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 15158 | } |
5c4e30ca | 15159 | } |
9219021c | 15160 | |
639d11d3 | 15161 | if (die->child != NULL) |
d9fa45fe | 15162 | { |
639d11d3 | 15163 | struct die_info *child_die = die->child; |
6e70227d | 15164 | |
d9fa45fe DC |
15165 | while (child_die && child_die->tag) |
15166 | { | |
e7c27a73 | 15167 | process_die (child_die, cu); |
d9fa45fe DC |
15168 | child_die = sibling_die (child_die); |
15169 | } | |
15170 | } | |
38d518c9 EZ |
15171 | } |
15172 | ||
f55ee35c JK |
15173 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
15174 | imported module. Still we need that type as local Fortran "use ... only" | |
15175 | declaration imports depend on the created type in determine_prefix. */ | |
15176 | ||
15177 | static struct type * | |
15178 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
15179 | { | |
15180 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 15181 | const char *module_name; |
f55ee35c JK |
15182 | struct type *type; |
15183 | ||
15184 | module_name = dwarf2_name (die, cu); | |
15185 | if (!module_name) | |
3e43a32a MS |
15186 | complaint (&symfile_complaints, |
15187 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 15188 | to_underlying (die->sect_off)); |
19f392bc | 15189 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
15190 | |
15191 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
15192 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
15193 | ||
15194 | return set_die_type (die, type, cu); | |
15195 | } | |
15196 | ||
5d7cb8df JK |
15197 | /* Read a Fortran module. */ |
15198 | ||
15199 | static void | |
15200 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
15201 | { | |
15202 | struct die_info *child_die = die->child; | |
530e8392 KB |
15203 | struct type *type; |
15204 | ||
15205 | type = read_type_die (die, cu); | |
15206 | new_symbol (die, type, cu); | |
5d7cb8df | 15207 | |
5d7cb8df JK |
15208 | while (child_die && child_die->tag) |
15209 | { | |
15210 | process_die (child_die, cu); | |
15211 | child_die = sibling_die (child_die); | |
15212 | } | |
15213 | } | |
15214 | ||
38d518c9 EZ |
15215 | /* Return the name of the namespace represented by DIE. Set |
15216 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
15217 | namespace. */ | |
15218 | ||
15219 | static const char * | |
e142c38c | 15220 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
15221 | { |
15222 | struct die_info *current_die; | |
15223 | const char *name = NULL; | |
15224 | ||
15225 | /* Loop through the extensions until we find a name. */ | |
15226 | ||
15227 | for (current_die = die; | |
15228 | current_die != NULL; | |
f2f0e013 | 15229 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 15230 | { |
96553a0c DE |
15231 | /* We don't use dwarf2_name here so that we can detect the absence |
15232 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 15233 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 15234 | |
38d518c9 EZ |
15235 | if (name != NULL) |
15236 | break; | |
15237 | } | |
15238 | ||
15239 | /* Is it an anonymous namespace? */ | |
15240 | ||
15241 | *is_anonymous = (name == NULL); | |
15242 | if (*is_anonymous) | |
2b1dbab0 | 15243 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
15244 | |
15245 | return name; | |
d9fa45fe DC |
15246 | } |
15247 | ||
c906108c SS |
15248 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
15249 | the user defined type vector. */ | |
15250 | ||
f792889a | 15251 | static struct type * |
e7c27a73 | 15252 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15253 | { |
5e2b427d | 15254 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 15255 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 15256 | struct type *type; |
8b2dbe47 KB |
15257 | struct attribute *attr_byte_size; |
15258 | struct attribute *attr_address_class; | |
15259 | int byte_size, addr_class; | |
7e314c57 JK |
15260 | struct type *target_type; |
15261 | ||
15262 | target_type = die_type (die, cu); | |
c906108c | 15263 | |
7e314c57 JK |
15264 | /* The die_type call above may have already set the type for this DIE. */ |
15265 | type = get_die_type (die, cu); | |
15266 | if (type) | |
15267 | return type; | |
15268 | ||
15269 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 15270 | |
e142c38c | 15271 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
15272 | if (attr_byte_size) |
15273 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 15274 | else |
8b2dbe47 KB |
15275 | byte_size = cu_header->addr_size; |
15276 | ||
e142c38c | 15277 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
15278 | if (attr_address_class) |
15279 | addr_class = DW_UNSND (attr_address_class); | |
15280 | else | |
15281 | addr_class = DW_ADDR_none; | |
15282 | ||
15283 | /* If the pointer size or address class is different than the | |
15284 | default, create a type variant marked as such and set the | |
15285 | length accordingly. */ | |
15286 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 15287 | { |
5e2b427d | 15288 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
15289 | { |
15290 | int type_flags; | |
15291 | ||
849957d9 | 15292 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 15293 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
15294 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
15295 | == 0); | |
8b2dbe47 KB |
15296 | type = make_type_with_address_space (type, type_flags); |
15297 | } | |
15298 | else if (TYPE_LENGTH (type) != byte_size) | |
15299 | { | |
3e43a32a MS |
15300 | complaint (&symfile_complaints, |
15301 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 15302 | } |
6e70227d | 15303 | else |
9a619af0 MS |
15304 | { |
15305 | /* Should we also complain about unhandled address classes? */ | |
15306 | } | |
c906108c | 15307 | } |
8b2dbe47 KB |
15308 | |
15309 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 15310 | return set_die_type (die, type, cu); |
c906108c SS |
15311 | } |
15312 | ||
15313 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
15314 | the user defined type vector. */ | |
15315 | ||
f792889a | 15316 | static struct type * |
e7c27a73 | 15317 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
15318 | { |
15319 | struct type *type; | |
15320 | struct type *to_type; | |
15321 | struct type *domain; | |
15322 | ||
e7c27a73 DJ |
15323 | to_type = die_type (die, cu); |
15324 | domain = die_containing_type (die, cu); | |
0d5de010 | 15325 | |
7e314c57 JK |
15326 | /* The calls above may have already set the type for this DIE. */ |
15327 | type = get_die_type (die, cu); | |
15328 | if (type) | |
15329 | return type; | |
15330 | ||
0d5de010 DJ |
15331 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
15332 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
15333 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
15334 | { | |
15335 | struct type *new_type = alloc_type (cu->objfile); | |
15336 | ||
15337 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
15338 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
15339 | TYPE_VARARGS (to_type)); | |
15340 | type = lookup_methodptr_type (new_type); | |
15341 | } | |
0d5de010 DJ |
15342 | else |
15343 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 15344 | |
f792889a | 15345 | return set_die_type (die, type, cu); |
c906108c SS |
15346 | } |
15347 | ||
4297a3f0 | 15348 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
15349 | the user defined type vector. */ |
15350 | ||
f792889a | 15351 | static struct type * |
4297a3f0 AV |
15352 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
15353 | enum type_code refcode) | |
c906108c | 15354 | { |
e7c27a73 | 15355 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 15356 | struct type *type, *target_type; |
c906108c SS |
15357 | struct attribute *attr; |
15358 | ||
4297a3f0 AV |
15359 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
15360 | ||
7e314c57 JK |
15361 | target_type = die_type (die, cu); |
15362 | ||
15363 | /* The die_type call above may have already set the type for this DIE. */ | |
15364 | type = get_die_type (die, cu); | |
15365 | if (type) | |
15366 | return type; | |
15367 | ||
4297a3f0 | 15368 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 15369 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15370 | if (attr) |
15371 | { | |
15372 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15373 | } | |
15374 | else | |
15375 | { | |
107d2387 | 15376 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 15377 | } |
f792889a | 15378 | return set_die_type (die, type, cu); |
c906108c SS |
15379 | } |
15380 | ||
cf363f18 MW |
15381 | /* Add the given cv-qualifiers to the element type of the array. GCC |
15382 | outputs DWARF type qualifiers that apply to an array, not the | |
15383 | element type. But GDB relies on the array element type to carry | |
15384 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
15385 | specification. */ | |
15386 | ||
15387 | static struct type * | |
15388 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
15389 | struct type *base_type, int cnst, int voltl) | |
15390 | { | |
15391 | struct type *el_type, *inner_array; | |
15392 | ||
15393 | base_type = copy_type (base_type); | |
15394 | inner_array = base_type; | |
15395 | ||
15396 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
15397 | { | |
15398 | TYPE_TARGET_TYPE (inner_array) = | |
15399 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
15400 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
15401 | } | |
15402 | ||
15403 | el_type = TYPE_TARGET_TYPE (inner_array); | |
15404 | cnst |= TYPE_CONST (el_type); | |
15405 | voltl |= TYPE_VOLATILE (el_type); | |
15406 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
15407 | ||
15408 | return set_die_type (die, base_type, cu); | |
15409 | } | |
15410 | ||
f792889a | 15411 | static struct type * |
e7c27a73 | 15412 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15413 | { |
f792889a | 15414 | struct type *base_type, *cv_type; |
c906108c | 15415 | |
e7c27a73 | 15416 | base_type = die_type (die, cu); |
7e314c57 JK |
15417 | |
15418 | /* The die_type call above may have already set the type for this DIE. */ | |
15419 | cv_type = get_die_type (die, cu); | |
15420 | if (cv_type) | |
15421 | return cv_type; | |
15422 | ||
2f608a3a KW |
15423 | /* In case the const qualifier is applied to an array type, the element type |
15424 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
15425 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 15426 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 15427 | |
f792889a DJ |
15428 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
15429 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15430 | } |
15431 | ||
f792889a | 15432 | static struct type * |
e7c27a73 | 15433 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15434 | { |
f792889a | 15435 | struct type *base_type, *cv_type; |
c906108c | 15436 | |
e7c27a73 | 15437 | base_type = die_type (die, cu); |
7e314c57 JK |
15438 | |
15439 | /* The die_type call above may have already set the type for this DIE. */ | |
15440 | cv_type = get_die_type (die, cu); | |
15441 | if (cv_type) | |
15442 | return cv_type; | |
15443 | ||
cf363f18 MW |
15444 | /* In case the volatile qualifier is applied to an array type, the |
15445 | element type is so qualified, not the array type (section 6.7.3 | |
15446 | of C99). */ | |
15447 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
15448 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
15449 | ||
f792889a DJ |
15450 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
15451 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
15452 | } |
15453 | ||
06d66ee9 TT |
15454 | /* Handle DW_TAG_restrict_type. */ |
15455 | ||
15456 | static struct type * | |
15457 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
15458 | { | |
15459 | struct type *base_type, *cv_type; | |
15460 | ||
15461 | base_type = die_type (die, cu); | |
15462 | ||
15463 | /* The die_type call above may have already set the type for this DIE. */ | |
15464 | cv_type = get_die_type (die, cu); | |
15465 | if (cv_type) | |
15466 | return cv_type; | |
15467 | ||
15468 | cv_type = make_restrict_type (base_type); | |
15469 | return set_die_type (die, cv_type, cu); | |
15470 | } | |
15471 | ||
a2c2acaf MW |
15472 | /* Handle DW_TAG_atomic_type. */ |
15473 | ||
15474 | static struct type * | |
15475 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
15476 | { | |
15477 | struct type *base_type, *cv_type; | |
15478 | ||
15479 | base_type = die_type (die, cu); | |
15480 | ||
15481 | /* The die_type call above may have already set the type for this DIE. */ | |
15482 | cv_type = get_die_type (die, cu); | |
15483 | if (cv_type) | |
15484 | return cv_type; | |
15485 | ||
15486 | cv_type = make_atomic_type (base_type); | |
15487 | return set_die_type (die, cv_type, cu); | |
15488 | } | |
15489 | ||
c906108c SS |
15490 | /* Extract all information from a DW_TAG_string_type DIE and add to |
15491 | the user defined type vector. It isn't really a user defined type, | |
15492 | but it behaves like one, with other DIE's using an AT_user_def_type | |
15493 | attribute to reference it. */ | |
15494 | ||
f792889a | 15495 | static struct type * |
e7c27a73 | 15496 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15497 | { |
e7c27a73 | 15498 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 15499 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15500 | struct type *type, *range_type, *index_type, *char_type; |
15501 | struct attribute *attr; | |
15502 | unsigned int length; | |
15503 | ||
e142c38c | 15504 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
15505 | if (attr) |
15506 | { | |
15507 | length = DW_UNSND (attr); | |
15508 | } | |
15509 | else | |
15510 | { | |
0963b4bd | 15511 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 15512 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
15513 | if (attr) |
15514 | { | |
15515 | length = DW_UNSND (attr); | |
15516 | } | |
15517 | else | |
15518 | { | |
15519 | length = 1; | |
15520 | } | |
c906108c | 15521 | } |
6ccb9162 | 15522 | |
46bf5051 | 15523 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15524 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
15525 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
15526 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 15527 | |
f792889a | 15528 | return set_die_type (die, type, cu); |
c906108c SS |
15529 | } |
15530 | ||
4d804846 JB |
15531 | /* Assuming that DIE corresponds to a function, returns nonzero |
15532 | if the function is prototyped. */ | |
15533 | ||
15534 | static int | |
15535 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
15536 | { | |
15537 | struct attribute *attr; | |
15538 | ||
15539 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
15540 | if (attr && (DW_UNSND (attr) != 0)) | |
15541 | return 1; | |
15542 | ||
15543 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
15544 | is only meaninful for C, but the concept also extends to other | |
15545 | languages that allow unprototyped functions (Eg: Objective C). | |
15546 | For all other languages, assume that functions are always | |
15547 | prototyped. */ | |
15548 | if (cu->language != language_c | |
15549 | && cu->language != language_objc | |
15550 | && cu->language != language_opencl) | |
15551 | return 1; | |
15552 | ||
15553 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
15554 | prototyped and unprototyped functions; default to prototyped, | |
15555 | since that is more common in modern code (and RealView warns | |
15556 | about unprototyped functions). */ | |
15557 | if (producer_is_realview (cu->producer)) | |
15558 | return 1; | |
15559 | ||
15560 | return 0; | |
15561 | } | |
15562 | ||
c906108c SS |
15563 | /* Handle DIES due to C code like: |
15564 | ||
15565 | struct foo | |
c5aa993b JM |
15566 | { |
15567 | int (*funcp)(int a, long l); | |
15568 | int b; | |
15569 | }; | |
c906108c | 15570 | |
0963b4bd | 15571 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 15572 | |
f792889a | 15573 | static struct type * |
e7c27a73 | 15574 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15575 | { |
bb5ed363 | 15576 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
15577 | struct type *type; /* Type that this function returns. */ |
15578 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
15579 | struct attribute *attr; |
15580 | ||
e7c27a73 | 15581 | type = die_type (die, cu); |
7e314c57 JK |
15582 | |
15583 | /* The die_type call above may have already set the type for this DIE. */ | |
15584 | ftype = get_die_type (die, cu); | |
15585 | if (ftype) | |
15586 | return ftype; | |
15587 | ||
0c8b41f1 | 15588 | ftype = lookup_function_type (type); |
c906108c | 15589 | |
4d804846 | 15590 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15591 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15592 | |
c055b101 CV |
15593 | /* Store the calling convention in the type if it's available in |
15594 | the subroutine die. Otherwise set the calling convention to | |
15595 | the default value DW_CC_normal. */ | |
15596 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15597 | if (attr) |
15598 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15599 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15600 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15601 | else | |
15602 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15603 | |
743649fd MW |
15604 | /* Record whether the function returns normally to its caller or not |
15605 | if the DWARF producer set that information. */ | |
15606 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15607 | if (attr && (DW_UNSND (attr) != 0)) | |
15608 | TYPE_NO_RETURN (ftype) = 1; | |
15609 | ||
76c10ea2 GM |
15610 | /* We need to add the subroutine type to the die immediately so |
15611 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15612 | declared as the same subroutine type. */ |
76c10ea2 | 15613 | set_die_type (die, ftype, cu); |
6e70227d | 15614 | |
639d11d3 | 15615 | if (die->child != NULL) |
c906108c | 15616 | { |
bb5ed363 | 15617 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15618 | struct die_info *child_die; |
8072405b | 15619 | int nparams, iparams; |
c906108c SS |
15620 | |
15621 | /* Count the number of parameters. | |
15622 | FIXME: GDB currently ignores vararg functions, but knows about | |
15623 | vararg member functions. */ | |
8072405b | 15624 | nparams = 0; |
639d11d3 | 15625 | child_die = die->child; |
c906108c SS |
15626 | while (child_die && child_die->tag) |
15627 | { | |
15628 | if (child_die->tag == DW_TAG_formal_parameter) | |
15629 | nparams++; | |
15630 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15631 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15632 | child_die = sibling_die (child_die); |
15633 | } | |
15634 | ||
15635 | /* Allocate storage for parameters and fill them in. */ | |
15636 | TYPE_NFIELDS (ftype) = nparams; | |
15637 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15638 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15639 | |
8072405b JK |
15640 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15641 | even if we error out during the parameters reading below. */ | |
15642 | for (iparams = 0; iparams < nparams; iparams++) | |
15643 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15644 | ||
15645 | iparams = 0; | |
639d11d3 | 15646 | child_die = die->child; |
c906108c SS |
15647 | while (child_die && child_die->tag) |
15648 | { | |
15649 | if (child_die->tag == DW_TAG_formal_parameter) | |
15650 | { | |
3ce3b1ba PA |
15651 | struct type *arg_type; |
15652 | ||
15653 | /* DWARF version 2 has no clean way to discern C++ | |
15654 | static and non-static member functions. G++ helps | |
15655 | GDB by marking the first parameter for non-static | |
15656 | member functions (which is the this pointer) as | |
15657 | artificial. We pass this information to | |
15658 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15659 | ||
15660 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15661 | 4.5 does not yet generate. */ | |
e142c38c | 15662 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15663 | if (attr) |
15664 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
15665 | else | |
9c37b5ae | 15666 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
15667 | arg_type = die_type (child_die, cu); |
15668 | ||
15669 | /* RealView does not mark THIS as const, which the testsuite | |
15670 | expects. GCC marks THIS as const in method definitions, | |
15671 | but not in the class specifications (GCC PR 43053). */ | |
15672 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
15673 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
15674 | { | |
15675 | int is_this = 0; | |
15676 | struct dwarf2_cu *arg_cu = cu; | |
15677 | const char *name = dwarf2_name (child_die, cu); | |
15678 | ||
15679 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
15680 | if (attr) | |
15681 | { | |
15682 | /* If the compiler emits this, use it. */ | |
15683 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
15684 | is_this = 1; | |
15685 | } | |
15686 | else if (name && strcmp (name, "this") == 0) | |
15687 | /* Function definitions will have the argument names. */ | |
15688 | is_this = 1; | |
15689 | else if (name == NULL && iparams == 0) | |
15690 | /* Declarations may not have the names, so like | |
15691 | elsewhere in GDB, assume an artificial first | |
15692 | argument is "this". */ | |
15693 | is_this = 1; | |
15694 | ||
15695 | if (is_this) | |
15696 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
15697 | arg_type, 0); | |
15698 | } | |
15699 | ||
15700 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
15701 | iparams++; |
15702 | } | |
15703 | child_die = sibling_die (child_die); | |
15704 | } | |
15705 | } | |
15706 | ||
76c10ea2 | 15707 | return ftype; |
c906108c SS |
15708 | } |
15709 | ||
f792889a | 15710 | static struct type * |
e7c27a73 | 15711 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15712 | { |
e7c27a73 | 15713 | struct objfile *objfile = cu->objfile; |
0114d602 | 15714 | const char *name = NULL; |
3c8e0968 | 15715 | struct type *this_type, *target_type; |
c906108c | 15716 | |
94af9270 | 15717 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
15718 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
15719 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 15720 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
15721 | target_type = die_type (die, cu); |
15722 | if (target_type != this_type) | |
15723 | TYPE_TARGET_TYPE (this_type) = target_type; | |
15724 | else | |
15725 | { | |
15726 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
15727 | spec and cause infinite loops in GDB. */ | |
15728 | complaint (&symfile_complaints, | |
15729 | _("Self-referential DW_TAG_typedef " | |
15730 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15731 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
15732 | TYPE_TARGET_TYPE (this_type) = NULL; |
15733 | } | |
f792889a | 15734 | return this_type; |
c906108c SS |
15735 | } |
15736 | ||
9b790ce7 UW |
15737 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
15738 | (which may be different from NAME) to the architecture back-end to allow | |
15739 | it to guess the correct format if necessary. */ | |
15740 | ||
15741 | static struct type * | |
15742 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
15743 | const char *name_hint) | |
15744 | { | |
15745 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15746 | const struct floatformat **format; | |
15747 | struct type *type; | |
15748 | ||
15749 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
15750 | if (format) | |
15751 | type = init_float_type (objfile, bits, name, format); | |
15752 | else | |
77b7c781 | 15753 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
15754 | |
15755 | return type; | |
15756 | } | |
15757 | ||
c906108c SS |
15758 | /* Find a representation of a given base type and install |
15759 | it in the TYPE field of the die. */ | |
15760 | ||
f792889a | 15761 | static struct type * |
e7c27a73 | 15762 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15763 | { |
e7c27a73 | 15764 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15765 | struct type *type; |
15766 | struct attribute *attr; | |
19f392bc | 15767 | int encoding = 0, bits = 0; |
15d034d0 | 15768 | const char *name; |
c906108c | 15769 | |
e142c38c | 15770 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
15771 | if (attr) |
15772 | { | |
15773 | encoding = DW_UNSND (attr); | |
15774 | } | |
e142c38c | 15775 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15776 | if (attr) |
15777 | { | |
19f392bc | 15778 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 15779 | } |
39cbfefa | 15780 | name = dwarf2_name (die, cu); |
6ccb9162 | 15781 | if (!name) |
c906108c | 15782 | { |
6ccb9162 UW |
15783 | complaint (&symfile_complaints, |
15784 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 15785 | } |
6ccb9162 UW |
15786 | |
15787 | switch (encoding) | |
c906108c | 15788 | { |
6ccb9162 UW |
15789 | case DW_ATE_address: |
15790 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 15791 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 15792 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
15793 | break; |
15794 | case DW_ATE_boolean: | |
19f392bc | 15795 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
15796 | break; |
15797 | case DW_ATE_complex_float: | |
9b790ce7 | 15798 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 15799 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
15800 | break; |
15801 | case DW_ATE_decimal_float: | |
19f392bc | 15802 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
15803 | break; |
15804 | case DW_ATE_float: | |
9b790ce7 | 15805 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
15806 | break; |
15807 | case DW_ATE_signed: | |
19f392bc | 15808 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
15809 | break; |
15810 | case DW_ATE_unsigned: | |
3b2b8fea TT |
15811 | if (cu->language == language_fortran |
15812 | && name | |
61012eef | 15813 | && startswith (name, "character(")) |
19f392bc UW |
15814 | type = init_character_type (objfile, bits, 1, name); |
15815 | else | |
15816 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
15817 | break; |
15818 | case DW_ATE_signed_char: | |
6e70227d | 15819 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
15820 | || cu->language == language_pascal |
15821 | || cu->language == language_fortran) | |
19f392bc UW |
15822 | type = init_character_type (objfile, bits, 0, name); |
15823 | else | |
15824 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
15825 | break; |
15826 | case DW_ATE_unsigned_char: | |
868a0084 | 15827 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 15828 | || cu->language == language_pascal |
c44af4eb TT |
15829 | || cu->language == language_fortran |
15830 | || cu->language == language_rust) | |
19f392bc UW |
15831 | type = init_character_type (objfile, bits, 1, name); |
15832 | else | |
15833 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 15834 | break; |
75079b2b | 15835 | case DW_ATE_UTF: |
53e710ac PA |
15836 | { |
15837 | gdbarch *arch = get_objfile_arch (objfile); | |
15838 | ||
15839 | if (bits == 16) | |
15840 | type = builtin_type (arch)->builtin_char16; | |
15841 | else if (bits == 32) | |
15842 | type = builtin_type (arch)->builtin_char32; | |
15843 | else | |
15844 | { | |
15845 | complaint (&symfile_complaints, | |
15846 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
15847 | bits); | |
15848 | type = init_integer_type (objfile, bits, 1, name); | |
15849 | } | |
15850 | return set_die_type (die, type, cu); | |
15851 | } | |
75079b2b TT |
15852 | break; |
15853 | ||
6ccb9162 UW |
15854 | default: |
15855 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
15856 | dwarf_type_encoding_name (encoding)); | |
77b7c781 | 15857 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 15858 | break; |
c906108c | 15859 | } |
6ccb9162 | 15860 | |
0114d602 | 15861 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 15862 | TYPE_NOSIGN (type) = 1; |
0114d602 | 15863 | |
f792889a | 15864 | return set_die_type (die, type, cu); |
c906108c SS |
15865 | } |
15866 | ||
80180f79 SA |
15867 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
15868 | resulting value of the attribute into struct bound_prop. | |
15869 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
15870 | ||
15871 | static int | |
15872 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
15873 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
15874 | { | |
15875 | struct dwarf2_property_baton *baton; | |
15876 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
15877 | ||
15878 | if (attr == NULL || prop == NULL) | |
15879 | return 0; | |
15880 | ||
15881 | if (attr_form_is_block (attr)) | |
15882 | { | |
8d749320 | 15883 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
15884 | baton->referenced_type = NULL; |
15885 | baton->locexpr.per_cu = cu->per_cu; | |
15886 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
15887 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
15888 | prop->data.baton = baton; | |
15889 | prop->kind = PROP_LOCEXPR; | |
15890 | gdb_assert (prop->data.baton != NULL); | |
15891 | } | |
15892 | else if (attr_form_is_ref (attr)) | |
15893 | { | |
15894 | struct dwarf2_cu *target_cu = cu; | |
15895 | struct die_info *target_die; | |
15896 | struct attribute *target_attr; | |
15897 | ||
15898 | target_die = follow_die_ref (die, attr, &target_cu); | |
15899 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
15900 | if (target_attr == NULL) |
15901 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
15902 | target_cu); | |
80180f79 SA |
15903 | if (target_attr == NULL) |
15904 | return 0; | |
15905 | ||
df25ebbd | 15906 | switch (target_attr->name) |
80180f79 | 15907 | { |
df25ebbd JB |
15908 | case DW_AT_location: |
15909 | if (attr_form_is_section_offset (target_attr)) | |
15910 | { | |
8d749320 | 15911 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15912 | baton->referenced_type = die_type (target_die, target_cu); |
15913 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
15914 | prop->data.baton = baton; | |
15915 | prop->kind = PROP_LOCLIST; | |
15916 | gdb_assert (prop->data.baton != NULL); | |
15917 | } | |
15918 | else if (attr_form_is_block (target_attr)) | |
15919 | { | |
8d749320 | 15920 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15921 | baton->referenced_type = die_type (target_die, target_cu); |
15922 | baton->locexpr.per_cu = cu->per_cu; | |
15923 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
15924 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
15925 | prop->data.baton = baton; | |
15926 | prop->kind = PROP_LOCEXPR; | |
15927 | gdb_assert (prop->data.baton != NULL); | |
15928 | } | |
15929 | else | |
15930 | { | |
15931 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15932 | "dynamic property"); | |
15933 | return 0; | |
15934 | } | |
15935 | break; | |
15936 | case DW_AT_data_member_location: | |
15937 | { | |
15938 | LONGEST offset; | |
15939 | ||
15940 | if (!handle_data_member_location (target_die, target_cu, | |
15941 | &offset)) | |
15942 | return 0; | |
15943 | ||
8d749320 | 15944 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
15945 | baton->referenced_type = read_type_die (target_die->parent, |
15946 | target_cu); | |
df25ebbd JB |
15947 | baton->offset_info.offset = offset; |
15948 | baton->offset_info.type = die_type (target_die, target_cu); | |
15949 | prop->data.baton = baton; | |
15950 | prop->kind = PROP_ADDR_OFFSET; | |
15951 | break; | |
15952 | } | |
80180f79 SA |
15953 | } |
15954 | } | |
15955 | else if (attr_form_is_constant (attr)) | |
15956 | { | |
15957 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
15958 | prop->kind = PROP_CONST; | |
15959 | } | |
15960 | else | |
15961 | { | |
15962 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
15963 | dwarf2_name (die, cu)); | |
15964 | return 0; | |
15965 | } | |
15966 | ||
15967 | return 1; | |
15968 | } | |
15969 | ||
a02abb62 JB |
15970 | /* Read the given DW_AT_subrange DIE. */ |
15971 | ||
f792889a | 15972 | static struct type * |
a02abb62 JB |
15973 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
15974 | { | |
4c9ad8c2 | 15975 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
15976 | struct type *range_type; |
15977 | struct attribute *attr; | |
729efb13 | 15978 | struct dynamic_prop low, high; |
4fae6e18 | 15979 | int low_default_is_valid; |
c451ebe5 | 15980 | int high_bound_is_count = 0; |
15d034d0 | 15981 | const char *name; |
43bbcdc2 | 15982 | LONGEST negative_mask; |
e77813c8 | 15983 | |
4c9ad8c2 TT |
15984 | orig_base_type = die_type (die, cu); |
15985 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
15986 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
15987 | creating the range type, but we use the result of check_typedef | |
15988 | when examining properties of the type. */ | |
15989 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 15990 | |
7e314c57 JK |
15991 | /* The die_type call above may have already set the type for this DIE. */ |
15992 | range_type = get_die_type (die, cu); | |
15993 | if (range_type) | |
15994 | return range_type; | |
15995 | ||
729efb13 SA |
15996 | low.kind = PROP_CONST; |
15997 | high.kind = PROP_CONST; | |
15998 | high.data.const_val = 0; | |
15999 | ||
4fae6e18 JK |
16000 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
16001 | omitting DW_AT_lower_bound. */ | |
16002 | switch (cu->language) | |
6e70227d | 16003 | { |
4fae6e18 JK |
16004 | case language_c: |
16005 | case language_cplus: | |
729efb13 | 16006 | low.data.const_val = 0; |
4fae6e18 JK |
16007 | low_default_is_valid = 1; |
16008 | break; | |
16009 | case language_fortran: | |
729efb13 | 16010 | low.data.const_val = 1; |
4fae6e18 JK |
16011 | low_default_is_valid = 1; |
16012 | break; | |
16013 | case language_d: | |
4fae6e18 | 16014 | case language_objc: |
c44af4eb | 16015 | case language_rust: |
729efb13 | 16016 | low.data.const_val = 0; |
4fae6e18 JK |
16017 | low_default_is_valid = (cu->header.version >= 4); |
16018 | break; | |
16019 | case language_ada: | |
16020 | case language_m2: | |
16021 | case language_pascal: | |
729efb13 | 16022 | low.data.const_val = 1; |
4fae6e18 JK |
16023 | low_default_is_valid = (cu->header.version >= 4); |
16024 | break; | |
16025 | default: | |
729efb13 | 16026 | low.data.const_val = 0; |
4fae6e18 JK |
16027 | low_default_is_valid = 0; |
16028 | break; | |
a02abb62 JB |
16029 | } |
16030 | ||
e142c38c | 16031 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 16032 | if (attr) |
11c1ba78 | 16033 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
16034 | else if (!low_default_is_valid) |
16035 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
16036 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16037 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 16038 | |
e142c38c | 16039 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 16040 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
16041 | { |
16042 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 16043 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 16044 | { |
c451ebe5 SA |
16045 | /* If bounds are constant do the final calculation here. */ |
16046 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
16047 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
16048 | else | |
16049 | high_bound_is_count = 1; | |
c2ff108b | 16050 | } |
e77813c8 PM |
16051 | } |
16052 | ||
16053 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
16054 | without specifying a base type. | |
16055 | In that case, the base type must be set to the type of | |
16056 | the lower bound, upper bound or count, in that order, if any of these | |
16057 | three attributes references an object that has a type. | |
16058 | If no base type is found, the Dwarf-2 specifications say that | |
16059 | a signed integer type of size equal to the size of an address should | |
16060 | be used. | |
16061 | For the following C code: `extern char gdb_int [];' | |
16062 | GCC produces an empty range DIE. | |
16063 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 16064 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
16065 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
16066 | { | |
16067 | struct objfile *objfile = cu->objfile; | |
16068 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16069 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
16070 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
16071 | ||
16072 | /* Test "int", "long int", and "long long int" objfile types, | |
16073 | and select the first one having a size above or equal to the | |
16074 | architecture address size. */ | |
16075 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16076 | base_type = int_type; | |
16077 | else | |
16078 | { | |
16079 | int_type = objfile_type (objfile)->builtin_long; | |
16080 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16081 | base_type = int_type; | |
16082 | else | |
16083 | { | |
16084 | int_type = objfile_type (objfile)->builtin_long_long; | |
16085 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
16086 | base_type = int_type; | |
16087 | } | |
16088 | } | |
16089 | } | |
a02abb62 | 16090 | |
dbb9c2b1 JB |
16091 | /* Normally, the DWARF producers are expected to use a signed |
16092 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
16093 | But this is unfortunately not always the case, as witnessed | |
16094 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
16095 | is used instead. To work around that ambiguity, we treat | |
16096 | the bounds as signed, and thus sign-extend their values, when | |
16097 | the base type is signed. */ | |
6e70227d | 16098 | negative_mask = |
66c6502d | 16099 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
16100 | if (low.kind == PROP_CONST |
16101 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
16102 | low.data.const_val |= negative_mask; | |
16103 | if (high.kind == PROP_CONST | |
16104 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
16105 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 16106 | |
729efb13 | 16107 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 16108 | |
c451ebe5 SA |
16109 | if (high_bound_is_count) |
16110 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
16111 | ||
c2ff108b JK |
16112 | /* Ada expects an empty array on no boundary attributes. */ |
16113 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 16114 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 16115 | |
39cbfefa DJ |
16116 | name = dwarf2_name (die, cu); |
16117 | if (name) | |
16118 | TYPE_NAME (range_type) = name; | |
6e70227d | 16119 | |
e142c38c | 16120 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
16121 | if (attr) |
16122 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
16123 | ||
7e314c57 JK |
16124 | set_die_type (die, range_type, cu); |
16125 | ||
16126 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16127 | set_descriptive_type (range_type, die, cu); |
16128 | ||
7e314c57 | 16129 | return range_type; |
a02abb62 | 16130 | } |
6e70227d | 16131 | |
f792889a | 16132 | static struct type * |
81a17f79 JB |
16133 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
16134 | { | |
16135 | struct type *type; | |
81a17f79 | 16136 | |
81a17f79 JB |
16137 | /* For now, we only support the C meaning of an unspecified type: void. */ |
16138 | ||
19f392bc | 16139 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 16140 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 16141 | |
f792889a | 16142 | return set_die_type (die, type, cu); |
81a17f79 | 16143 | } |
a02abb62 | 16144 | |
639d11d3 DC |
16145 | /* Read a single die and all its descendents. Set the die's sibling |
16146 | field to NULL; set other fields in the die correctly, and set all | |
16147 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
16148 | location of the info_ptr after reading all of those dies. PARENT | |
16149 | is the parent of the die in question. */ | |
16150 | ||
16151 | static struct die_info * | |
dee91e82 | 16152 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
16153 | const gdb_byte *info_ptr, |
16154 | const gdb_byte **new_info_ptr, | |
dee91e82 | 16155 | struct die_info *parent) |
639d11d3 DC |
16156 | { |
16157 | struct die_info *die; | |
d521ce57 | 16158 | const gdb_byte *cur_ptr; |
639d11d3 DC |
16159 | int has_children; |
16160 | ||
bf6af496 | 16161 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
16162 | if (die == NULL) |
16163 | { | |
16164 | *new_info_ptr = cur_ptr; | |
16165 | return NULL; | |
16166 | } | |
93311388 | 16167 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
16168 | |
16169 | if (has_children) | |
bf6af496 | 16170 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
16171 | else |
16172 | { | |
16173 | die->child = NULL; | |
16174 | *new_info_ptr = cur_ptr; | |
16175 | } | |
16176 | ||
16177 | die->sibling = NULL; | |
16178 | die->parent = parent; | |
16179 | return die; | |
16180 | } | |
16181 | ||
16182 | /* Read a die, all of its descendents, and all of its siblings; set | |
16183 | all of the fields of all of the dies correctly. Arguments are as | |
16184 | in read_die_and_children. */ | |
16185 | ||
16186 | static struct die_info * | |
bf6af496 | 16187 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
16188 | const gdb_byte *info_ptr, |
16189 | const gdb_byte **new_info_ptr, | |
bf6af496 | 16190 | struct die_info *parent) |
639d11d3 DC |
16191 | { |
16192 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 16193 | const gdb_byte *cur_ptr; |
639d11d3 | 16194 | |
c906108c | 16195 | cur_ptr = info_ptr; |
639d11d3 DC |
16196 | first_die = last_sibling = NULL; |
16197 | ||
16198 | while (1) | |
c906108c | 16199 | { |
639d11d3 | 16200 | struct die_info *die |
dee91e82 | 16201 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 16202 | |
1d325ec1 | 16203 | if (die == NULL) |
c906108c | 16204 | { |
639d11d3 DC |
16205 | *new_info_ptr = cur_ptr; |
16206 | return first_die; | |
c906108c | 16207 | } |
1d325ec1 DJ |
16208 | |
16209 | if (!first_die) | |
16210 | first_die = die; | |
c906108c | 16211 | else |
1d325ec1 DJ |
16212 | last_sibling->sibling = die; |
16213 | ||
16214 | last_sibling = die; | |
c906108c | 16215 | } |
c906108c SS |
16216 | } |
16217 | ||
bf6af496 DE |
16218 | /* Read a die, all of its descendents, and all of its siblings; set |
16219 | all of the fields of all of the dies correctly. Arguments are as | |
16220 | in read_die_and_children. | |
16221 | This the main entry point for reading a DIE and all its children. */ | |
16222 | ||
16223 | static struct die_info * | |
16224 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
16225 | const gdb_byte *info_ptr, |
16226 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
16227 | struct die_info *parent) |
16228 | { | |
16229 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
16230 | new_info_ptr, parent); | |
16231 | ||
b4f54984 | 16232 | if (dwarf_die_debug) |
bf6af496 DE |
16233 | { |
16234 | fprintf_unfiltered (gdb_stdlog, | |
16235 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16236 | get_section_name (reader->die_section), |
bf6af496 DE |
16237 | (unsigned) (info_ptr - reader->die_section->buffer), |
16238 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16239 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
16240 | } |
16241 | ||
16242 | return die; | |
16243 | } | |
16244 | ||
3019eac3 DE |
16245 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
16246 | attributes. | |
16247 | The caller is responsible for filling in the extra attributes | |
16248 | and updating (*DIEP)->num_attrs. | |
16249 | Set DIEP to point to a newly allocated die with its information, | |
16250 | except for its child, sibling, and parent fields. | |
16251 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 16252 | |
d521ce57 | 16253 | static const gdb_byte * |
3019eac3 | 16254 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 16255 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 16256 | int *has_children, int num_extra_attrs) |
93311388 | 16257 | { |
b64f50a1 | 16258 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
16259 | struct abbrev_info *abbrev; |
16260 | struct die_info *die; | |
16261 | struct dwarf2_cu *cu = reader->cu; | |
16262 | bfd *abfd = reader->abfd; | |
16263 | ||
9c541725 | 16264 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
16265 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16266 | info_ptr += bytes_read; | |
16267 | if (!abbrev_number) | |
16268 | { | |
16269 | *diep = NULL; | |
16270 | *has_children = 0; | |
16271 | return info_ptr; | |
16272 | } | |
16273 | ||
433df2d4 | 16274 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 16275 | if (!abbrev) |
348e048f DE |
16276 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
16277 | abbrev_number, | |
16278 | bfd_get_filename (abfd)); | |
16279 | ||
3019eac3 | 16280 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 16281 | die->sect_off = sect_off; |
93311388 DE |
16282 | die->tag = abbrev->tag; |
16283 | die->abbrev = abbrev_number; | |
16284 | ||
3019eac3 DE |
16285 | /* Make the result usable. |
16286 | The caller needs to update num_attrs after adding the extra | |
16287 | attributes. */ | |
93311388 DE |
16288 | die->num_attrs = abbrev->num_attrs; |
16289 | ||
16290 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
16291 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
16292 | info_ptr); | |
93311388 DE |
16293 | |
16294 | *diep = die; | |
16295 | *has_children = abbrev->has_children; | |
16296 | return info_ptr; | |
16297 | } | |
16298 | ||
3019eac3 DE |
16299 | /* Read a die and all its attributes. |
16300 | Set DIEP to point to a newly allocated die with its information, | |
16301 | except for its child, sibling, and parent fields. | |
16302 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
16303 | ||
d521ce57 | 16304 | static const gdb_byte * |
3019eac3 | 16305 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 16306 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
16307 | int *has_children) |
16308 | { | |
d521ce57 | 16309 | const gdb_byte *result; |
bf6af496 DE |
16310 | |
16311 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
16312 | ||
b4f54984 | 16313 | if (dwarf_die_debug) |
bf6af496 DE |
16314 | { |
16315 | fprintf_unfiltered (gdb_stdlog, | |
16316 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 16317 | get_section_name (reader->die_section), |
bf6af496 DE |
16318 | (unsigned) (info_ptr - reader->die_section->buffer), |
16319 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 16320 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
16321 | } |
16322 | ||
16323 | return result; | |
3019eac3 | 16324 | } |
433df2d4 DE |
16325 | \f |
16326 | /* Abbreviation tables. | |
3019eac3 | 16327 | |
433df2d4 | 16328 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
16329 | stored in a separate .debug_abbrev section. Before we read any |
16330 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
16331 | in a hash table. */ |
16332 | ||
16333 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
16334 | ||
16335 | static struct abbrev_info * | |
16336 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
16337 | { | |
16338 | struct abbrev_info *abbrev; | |
16339 | ||
8d749320 | 16340 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 16341 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 16342 | |
433df2d4 DE |
16343 | return abbrev; |
16344 | } | |
16345 | ||
16346 | /* Add an abbreviation to the table. */ | |
c906108c SS |
16347 | |
16348 | static void | |
433df2d4 DE |
16349 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
16350 | unsigned int abbrev_number, | |
16351 | struct abbrev_info *abbrev) | |
16352 | { | |
16353 | unsigned int hash_number; | |
16354 | ||
16355 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16356 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
16357 | abbrev_table->abbrevs[hash_number] = abbrev; | |
16358 | } | |
dee91e82 | 16359 | |
433df2d4 DE |
16360 | /* Look up an abbrev in the table. |
16361 | Returns NULL if the abbrev is not found. */ | |
16362 | ||
16363 | static struct abbrev_info * | |
16364 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
16365 | unsigned int abbrev_number) | |
c906108c | 16366 | { |
433df2d4 DE |
16367 | unsigned int hash_number; |
16368 | struct abbrev_info *abbrev; | |
16369 | ||
16370 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
16371 | abbrev = abbrev_table->abbrevs[hash_number]; | |
16372 | ||
16373 | while (abbrev) | |
16374 | { | |
16375 | if (abbrev->number == abbrev_number) | |
16376 | return abbrev; | |
16377 | abbrev = abbrev->next; | |
16378 | } | |
16379 | return NULL; | |
16380 | } | |
16381 | ||
16382 | /* Read in an abbrev table. */ | |
16383 | ||
16384 | static struct abbrev_table * | |
16385 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 16386 | sect_offset sect_off) |
433df2d4 DE |
16387 | { |
16388 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 16389 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 16390 | struct abbrev_table *abbrev_table; |
d521ce57 | 16391 | const gdb_byte *abbrev_ptr; |
c906108c SS |
16392 | struct abbrev_info *cur_abbrev; |
16393 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 16394 | unsigned int abbrev_form; |
f3dd6933 DJ |
16395 | struct attr_abbrev *cur_attrs; |
16396 | unsigned int allocated_attrs; | |
c906108c | 16397 | |
70ba0933 | 16398 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 16399 | abbrev_table->sect_off = sect_off; |
433df2d4 | 16400 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
16401 | abbrev_table->abbrevs = |
16402 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
16403 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
16404 | memset (abbrev_table->abbrevs, 0, |
16405 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 16406 | |
433df2d4 | 16407 | dwarf2_read_section (objfile, section); |
9c541725 | 16408 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
16409 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16410 | abbrev_ptr += bytes_read; | |
16411 | ||
f3dd6933 | 16412 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 16413 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 16414 | |
0963b4bd | 16415 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
16416 | while (abbrev_number) |
16417 | { | |
433df2d4 | 16418 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
16419 | |
16420 | /* read in abbrev header */ | |
16421 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
16422 | cur_abbrev->tag |
16423 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
16424 | abbrev_ptr += bytes_read; |
16425 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
16426 | abbrev_ptr += 1; | |
16427 | ||
16428 | /* now read in declarations */ | |
22d2f3ab | 16429 | for (;;) |
c906108c | 16430 | { |
43988095 JK |
16431 | LONGEST implicit_const; |
16432 | ||
22d2f3ab JK |
16433 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
16434 | abbrev_ptr += bytes_read; | |
16435 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16436 | abbrev_ptr += bytes_read; | |
43988095 JK |
16437 | if (abbrev_form == DW_FORM_implicit_const) |
16438 | { | |
16439 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
16440 | &bytes_read); | |
16441 | abbrev_ptr += bytes_read; | |
16442 | } | |
16443 | else | |
16444 | { | |
16445 | /* Initialize it due to a false compiler warning. */ | |
16446 | implicit_const = -1; | |
16447 | } | |
22d2f3ab JK |
16448 | |
16449 | if (abbrev_name == 0) | |
16450 | break; | |
16451 | ||
f3dd6933 | 16452 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 16453 | { |
f3dd6933 DJ |
16454 | allocated_attrs += ATTR_ALLOC_CHUNK; |
16455 | cur_attrs | |
224c3ddb | 16456 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 16457 | } |
ae038cb0 | 16458 | |
aead7601 SM |
16459 | cur_attrs[cur_abbrev->num_attrs].name |
16460 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 16461 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 16462 | = (enum dwarf_form) abbrev_form; |
43988095 | 16463 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 16464 | ++cur_abbrev->num_attrs; |
c906108c SS |
16465 | } |
16466 | ||
8d749320 SM |
16467 | cur_abbrev->attrs = |
16468 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
16469 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
16470 | memcpy (cur_abbrev->attrs, cur_attrs, |
16471 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
16472 | ||
433df2d4 | 16473 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
16474 | |
16475 | /* Get next abbreviation. | |
16476 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
16477 | always properly terminated with an abbrev number of 0. |
16478 | Exit loop if we encounter an abbreviation which we have | |
16479 | already read (which means we are about to read the abbreviations | |
16480 | for the next compile unit) or if the end of the abbreviation | |
16481 | table is reached. */ | |
433df2d4 | 16482 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
16483 | break; |
16484 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
16485 | abbrev_ptr += bytes_read; | |
433df2d4 | 16486 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
16487 | break; |
16488 | } | |
f3dd6933 DJ |
16489 | |
16490 | xfree (cur_attrs); | |
433df2d4 | 16491 | return abbrev_table; |
c906108c SS |
16492 | } |
16493 | ||
433df2d4 | 16494 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 16495 | |
c906108c | 16496 | static void |
433df2d4 | 16497 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 16498 | { |
433df2d4 DE |
16499 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
16500 | xfree (abbrev_table); | |
c906108c SS |
16501 | } |
16502 | ||
f4dc4d17 DE |
16503 | /* Same as abbrev_table_free but as a cleanup. |
16504 | We pass in a pointer to the pointer to the table so that we can | |
16505 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 16506 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
16507 | |
16508 | static void | |
16509 | abbrev_table_free_cleanup (void *table_ptr) | |
16510 | { | |
9a3c8263 | 16511 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
16512 | |
16513 | if (*abbrev_table_ptr != NULL) | |
16514 | abbrev_table_free (*abbrev_table_ptr); | |
16515 | *abbrev_table_ptr = NULL; | |
16516 | } | |
16517 | ||
433df2d4 DE |
16518 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
16519 | ||
16520 | static void | |
16521 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
16522 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 16523 | { |
433df2d4 | 16524 | cu->abbrev_table = |
9c541725 | 16525 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 16526 | } |
c906108c | 16527 | |
433df2d4 | 16528 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 16529 | |
433df2d4 DE |
16530 | static void |
16531 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
16532 | { | |
9a3c8263 | 16533 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 16534 | |
a2ce51a0 DE |
16535 | if (cu->abbrev_table != NULL) |
16536 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
16537 | /* Set this to NULL so that we SEGV if we try to read it later, |
16538 | and also because free_comp_unit verifies this is NULL. */ | |
16539 | cu->abbrev_table = NULL; | |
16540 | } | |
16541 | \f | |
72bf9492 DJ |
16542 | /* Returns nonzero if TAG represents a type that we might generate a partial |
16543 | symbol for. */ | |
16544 | ||
16545 | static int | |
16546 | is_type_tag_for_partial (int tag) | |
16547 | { | |
16548 | switch (tag) | |
16549 | { | |
16550 | #if 0 | |
16551 | /* Some types that would be reasonable to generate partial symbols for, | |
16552 | that we don't at present. */ | |
16553 | case DW_TAG_array_type: | |
16554 | case DW_TAG_file_type: | |
16555 | case DW_TAG_ptr_to_member_type: | |
16556 | case DW_TAG_set_type: | |
16557 | case DW_TAG_string_type: | |
16558 | case DW_TAG_subroutine_type: | |
16559 | #endif | |
16560 | case DW_TAG_base_type: | |
16561 | case DW_TAG_class_type: | |
680b30c7 | 16562 | case DW_TAG_interface_type: |
72bf9492 DJ |
16563 | case DW_TAG_enumeration_type: |
16564 | case DW_TAG_structure_type: | |
16565 | case DW_TAG_subrange_type: | |
16566 | case DW_TAG_typedef: | |
16567 | case DW_TAG_union_type: | |
16568 | return 1; | |
16569 | default: | |
16570 | return 0; | |
16571 | } | |
16572 | } | |
16573 | ||
16574 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
16575 | ||
16576 | static struct partial_die_info * | |
dee91e82 | 16577 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 16578 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 16579 | { |
dee91e82 | 16580 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16581 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
16582 | struct partial_die_info *part_die; |
16583 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
16584 | struct abbrev_info *abbrev; | |
16585 | unsigned int bytes_read; | |
5afb4e99 | 16586 | unsigned int load_all = 0; |
72bf9492 DJ |
16587 | int nesting_level = 1; |
16588 | ||
16589 | parent_die = NULL; | |
16590 | last_die = NULL; | |
16591 | ||
7adf1e79 DE |
16592 | gdb_assert (cu->per_cu != NULL); |
16593 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16594 | load_all = 1; |
16595 | ||
72bf9492 DJ |
16596 | cu->partial_dies |
16597 | = htab_create_alloc_ex (cu->header.length / 12, | |
16598 | partial_die_hash, | |
16599 | partial_die_eq, | |
16600 | NULL, | |
16601 | &cu->comp_unit_obstack, | |
16602 | hashtab_obstack_allocate, | |
16603 | dummy_obstack_deallocate); | |
16604 | ||
8d749320 | 16605 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16606 | |
16607 | while (1) | |
16608 | { | |
16609 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16610 | ||
16611 | /* A NULL abbrev means the end of a series of children. */ | |
16612 | if (abbrev == NULL) | |
16613 | { | |
16614 | if (--nesting_level == 0) | |
16615 | { | |
16616 | /* PART_DIE was probably the last thing allocated on the | |
16617 | comp_unit_obstack, so we could call obstack_free | |
16618 | here. We don't do that because the waste is small, | |
16619 | and will be cleaned up when we're done with this | |
16620 | compilation unit. This way, we're also more robust | |
16621 | against other users of the comp_unit_obstack. */ | |
16622 | return first_die; | |
16623 | } | |
16624 | info_ptr += bytes_read; | |
16625 | last_die = parent_die; | |
16626 | parent_die = parent_die->die_parent; | |
16627 | continue; | |
16628 | } | |
16629 | ||
98bfdba5 PA |
16630 | /* Check for template arguments. We never save these; if |
16631 | they're seen, we just mark the parent, and go on our way. */ | |
16632 | if (parent_die != NULL | |
16633 | && cu->language == language_cplus | |
16634 | && (abbrev->tag == DW_TAG_template_type_param | |
16635 | || abbrev->tag == DW_TAG_template_value_param)) | |
16636 | { | |
16637 | parent_die->has_template_arguments = 1; | |
16638 | ||
16639 | if (!load_all) | |
16640 | { | |
16641 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16642 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16643 | continue; |
16644 | } | |
16645 | } | |
16646 | ||
0d99eb77 | 16647 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16648 | Skip their other children. */ |
16649 | if (!load_all | |
16650 | && cu->language == language_cplus | |
16651 | && parent_die != NULL | |
16652 | && parent_die->tag == DW_TAG_subprogram) | |
16653 | { | |
dee91e82 | 16654 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16655 | continue; |
16656 | } | |
16657 | ||
5afb4e99 DJ |
16658 | /* Check whether this DIE is interesting enough to save. Normally |
16659 | we would not be interested in members here, but there may be | |
16660 | later variables referencing them via DW_AT_specification (for | |
16661 | static members). */ | |
16662 | if (!load_all | |
16663 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16664 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
16665 | && abbrev->tag != DW_TAG_enumerator |
16666 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 16667 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 16668 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 16669 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 16670 | && abbrev->tag != DW_TAG_module |
95554aad | 16671 | && abbrev->tag != DW_TAG_member |
74921315 KS |
16672 | && abbrev->tag != DW_TAG_imported_unit |
16673 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
16674 | { |
16675 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16676 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
16677 | continue; |
16678 | } | |
16679 | ||
dee91e82 DE |
16680 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
16681 | info_ptr); | |
72bf9492 DJ |
16682 | |
16683 | /* This two-pass algorithm for processing partial symbols has a | |
16684 | high cost in cache pressure. Thus, handle some simple cases | |
16685 | here which cover the majority of C partial symbols. DIEs | |
16686 | which neither have specification tags in them, nor could have | |
16687 | specification tags elsewhere pointing at them, can simply be | |
16688 | processed and discarded. | |
16689 | ||
16690 | This segment is also optional; scan_partial_symbols and | |
16691 | add_partial_symbol will handle these DIEs if we chain | |
16692 | them in normally. When compilers which do not emit large | |
16693 | quantities of duplicate debug information are more common, | |
16694 | this code can probably be removed. */ | |
16695 | ||
16696 | /* Any complete simple types at the top level (pretty much all | |
16697 | of them, for a language without namespaces), can be processed | |
16698 | directly. */ | |
16699 | if (parent_die == NULL | |
16700 | && part_die->has_specification == 0 | |
16701 | && part_die->is_declaration == 0 | |
d8228535 | 16702 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
16703 | || part_die->tag == DW_TAG_base_type |
16704 | || part_die->tag == DW_TAG_subrange_type)) | |
16705 | { | |
16706 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 16707 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16708 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 16709 | &objfile->static_psymbols, |
1762568f | 16710 | 0, cu->language, objfile); |
dee91e82 | 16711 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16712 | continue; |
16713 | } | |
16714 | ||
d8228535 JK |
16715 | /* The exception for DW_TAG_typedef with has_children above is |
16716 | a workaround of GCC PR debug/47510. In the case of this complaint | |
16717 | type_name_no_tag_or_error will error on such types later. | |
16718 | ||
16719 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
16720 | it could not find the child DIEs referenced later, this is checked | |
16721 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
16722 | ||
16723 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
16724 | complaint (&symfile_complaints, | |
16725 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
16726 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16727 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 16728 | |
72bf9492 DJ |
16729 | /* If we're at the second level, and we're an enumerator, and |
16730 | our parent has no specification (meaning possibly lives in a | |
16731 | namespace elsewhere), then we can add the partial symbol now | |
16732 | instead of queueing it. */ | |
16733 | if (part_die->tag == DW_TAG_enumerator | |
16734 | && parent_die != NULL | |
16735 | && parent_die->die_parent == NULL | |
16736 | && parent_die->tag == DW_TAG_enumeration_type | |
16737 | && parent_die->has_specification == 0) | |
16738 | { | |
16739 | if (part_die->name == NULL) | |
3e43a32a MS |
16740 | complaint (&symfile_complaints, |
16741 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 16742 | else if (building_psymtab) |
04a679b8 | 16743 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16744 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 16745 | cu->language == language_cplus |
bb5ed363 DE |
16746 | ? &objfile->global_psymbols |
16747 | : &objfile->static_psymbols, | |
1762568f | 16748 | 0, cu->language, objfile); |
72bf9492 | 16749 | |
dee91e82 | 16750 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16751 | continue; |
16752 | } | |
16753 | ||
16754 | /* We'll save this DIE so link it in. */ | |
16755 | part_die->die_parent = parent_die; | |
16756 | part_die->die_sibling = NULL; | |
16757 | part_die->die_child = NULL; | |
16758 | ||
16759 | if (last_die && last_die == parent_die) | |
16760 | last_die->die_child = part_die; | |
16761 | else if (last_die) | |
16762 | last_die->die_sibling = part_die; | |
16763 | ||
16764 | last_die = part_die; | |
16765 | ||
16766 | if (first_die == NULL) | |
16767 | first_die = part_die; | |
16768 | ||
16769 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
16770 | find interesting need to be in the hash table, because we | |
16771 | also have the parent/sibling/child chains; only those that we | |
16772 | might refer to by offset later during partial symbol reading. | |
16773 | ||
16774 | For now this means things that might have be the target of a | |
16775 | DW_AT_specification, DW_AT_abstract_origin, or | |
16776 | DW_AT_extension. DW_AT_extension will refer only to | |
16777 | namespaces; DW_AT_abstract_origin refers to functions (and | |
16778 | many things under the function DIE, but we do not recurse | |
16779 | into function DIEs during partial symbol reading) and | |
16780 | possibly variables as well; DW_AT_specification refers to | |
16781 | declarations. Declarations ought to have the DW_AT_declaration | |
16782 | flag. It happens that GCC forgets to put it in sometimes, but | |
16783 | only for functions, not for types. | |
16784 | ||
16785 | Adding more things than necessary to the hash table is harmless | |
16786 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
16787 | wasted time in find_partial_die, when we reread the compilation |
16788 | unit with load_all_dies set. */ | |
72bf9492 | 16789 | |
5afb4e99 | 16790 | if (load_all |
72929c62 | 16791 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 16792 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
16793 | || abbrev->tag == DW_TAG_variable |
16794 | || abbrev->tag == DW_TAG_namespace | |
16795 | || part_die->is_declaration) | |
16796 | { | |
16797 | void **slot; | |
16798 | ||
16799 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
16800 | to_underlying (part_die->sect_off), |
16801 | INSERT); | |
72bf9492 DJ |
16802 | *slot = part_die; |
16803 | } | |
16804 | ||
8d749320 | 16805 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16806 | |
16807 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 16808 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
16809 | languages we have to, so that we can get at method physnames |
16810 | to infer fully qualified class names, for DW_AT_specification, | |
16811 | and for C++ template arguments. For C++, we also look one level | |
16812 | inside functions to find template arguments (if the name of the | |
16813 | function does not already contain the template arguments). | |
bc30ff58 JB |
16814 | |
16815 | For Ada, we need to scan the children of subprograms and lexical | |
16816 | blocks as well because Ada allows the definition of nested | |
16817 | entities that could be interesting for the debugger, such as | |
16818 | nested subprograms for instance. */ | |
72bf9492 | 16819 | if (last_die->has_children |
5afb4e99 DJ |
16820 | && (load_all |
16821 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 16822 | || last_die->tag == DW_TAG_module |
72bf9492 | 16823 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
16824 | || (cu->language == language_cplus |
16825 | && last_die->tag == DW_TAG_subprogram | |
16826 | && (last_die->name == NULL | |
16827 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
16828 | || (cu->language != language_c |
16829 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 16830 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 16831 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
16832 | || last_die->tag == DW_TAG_union_type)) |
16833 | || (cu->language == language_ada | |
16834 | && (last_die->tag == DW_TAG_subprogram | |
16835 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
16836 | { |
16837 | nesting_level++; | |
16838 | parent_die = last_die; | |
16839 | continue; | |
16840 | } | |
16841 | ||
16842 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16843 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
16844 | |
16845 | /* Back to the top, do it again. */ | |
16846 | } | |
16847 | } | |
16848 | ||
c906108c SS |
16849 | /* Read a minimal amount of information into the minimal die structure. */ |
16850 | ||
d521ce57 | 16851 | static const gdb_byte * |
dee91e82 DE |
16852 | read_partial_die (const struct die_reader_specs *reader, |
16853 | struct partial_die_info *part_die, | |
16854 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 16855 | const gdb_byte *info_ptr) |
c906108c | 16856 | { |
dee91e82 | 16857 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16858 | struct objfile *objfile = cu->objfile; |
d521ce57 | 16859 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 16860 | unsigned int i; |
c906108c | 16861 | struct attribute attr; |
c5aa993b | 16862 | int has_low_pc_attr = 0; |
c906108c | 16863 | int has_high_pc_attr = 0; |
91da1414 | 16864 | int high_pc_relative = 0; |
c906108c | 16865 | |
72bf9492 | 16866 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 16867 | |
9c541725 | 16868 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
16869 | |
16870 | info_ptr += abbrev_len; | |
16871 | ||
16872 | if (abbrev == NULL) | |
16873 | return info_ptr; | |
16874 | ||
c906108c SS |
16875 | part_die->tag = abbrev->tag; |
16876 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
16877 | |
16878 | for (i = 0; i < abbrev->num_attrs; ++i) | |
16879 | { | |
dee91e82 | 16880 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
16881 | |
16882 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 16883 | partial symbol table. */ |
c906108c SS |
16884 | switch (attr.name) |
16885 | { | |
16886 | case DW_AT_name: | |
71c25dea TT |
16887 | switch (part_die->tag) |
16888 | { | |
16889 | case DW_TAG_compile_unit: | |
95554aad | 16890 | case DW_TAG_partial_unit: |
348e048f | 16891 | case DW_TAG_type_unit: |
71c25dea TT |
16892 | /* Compilation units have a DW_AT_name that is a filename, not |
16893 | a source language identifier. */ | |
16894 | case DW_TAG_enumeration_type: | |
16895 | case DW_TAG_enumerator: | |
16896 | /* These tags always have simple identifiers already; no need | |
16897 | to canonicalize them. */ | |
16898 | part_die->name = DW_STRING (&attr); | |
16899 | break; | |
16900 | default: | |
16901 | part_die->name | |
16902 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 16903 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
16904 | break; |
16905 | } | |
c906108c | 16906 | break; |
31ef98ae | 16907 | case DW_AT_linkage_name: |
c906108c | 16908 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
16909 | /* Note that both forms of linkage name might appear. We |
16910 | assume they will be the same, and we only store the last | |
16911 | one we see. */ | |
94af9270 KS |
16912 | if (cu->language == language_ada) |
16913 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 16914 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
16915 | break; |
16916 | case DW_AT_low_pc: | |
16917 | has_low_pc_attr = 1; | |
31aa7e4e | 16918 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
16919 | break; |
16920 | case DW_AT_high_pc: | |
16921 | has_high_pc_attr = 1; | |
31aa7e4e JB |
16922 | part_die->highpc = attr_value_as_address (&attr); |
16923 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
16924 | high_pc_relative = 1; | |
c906108c SS |
16925 | break; |
16926 | case DW_AT_location: | |
0963b4bd | 16927 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
16928 | if (attr_form_is_block (&attr)) |
16929 | { | |
95554aad | 16930 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 16931 | } |
3690dd37 | 16932 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 16933 | { |
4d3c2250 | 16934 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
16935 | } |
16936 | else | |
16937 | { | |
4d3c2250 KB |
16938 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
16939 | "partial symbol information"); | |
8e19ed76 | 16940 | } |
c906108c | 16941 | break; |
c906108c SS |
16942 | case DW_AT_external: |
16943 | part_die->is_external = DW_UNSND (&attr); | |
16944 | break; | |
16945 | case DW_AT_declaration: | |
16946 | part_die->is_declaration = DW_UNSND (&attr); | |
16947 | break; | |
16948 | case DW_AT_type: | |
16949 | part_die->has_type = 1; | |
16950 | break; | |
16951 | case DW_AT_abstract_origin: | |
16952 | case DW_AT_specification: | |
72bf9492 DJ |
16953 | case DW_AT_extension: |
16954 | part_die->has_specification = 1; | |
c764a876 | 16955 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16956 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16957 | || cu->per_cu->is_dwz); | |
c906108c SS |
16958 | break; |
16959 | case DW_AT_sibling: | |
16960 | /* Ignore absolute siblings, they might point outside of | |
16961 | the current compile unit. */ | |
16962 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
16963 | complaint (&symfile_complaints, |
16964 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 16965 | else |
b9502d3f | 16966 | { |
9c541725 PA |
16967 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
16968 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
16969 | |
16970 | if (sibling_ptr < info_ptr) | |
16971 | complaint (&symfile_complaints, | |
16972 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
16973 | else if (sibling_ptr > reader->buffer_end) |
16974 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
16975 | else |
16976 | part_die->sibling = sibling_ptr; | |
16977 | } | |
c906108c | 16978 | break; |
fa4028e9 JB |
16979 | case DW_AT_byte_size: |
16980 | part_die->has_byte_size = 1; | |
16981 | break; | |
ff908ebf AW |
16982 | case DW_AT_const_value: |
16983 | part_die->has_const_value = 1; | |
16984 | break; | |
68511cec CES |
16985 | case DW_AT_calling_convention: |
16986 | /* DWARF doesn't provide a way to identify a program's source-level | |
16987 | entry point. DW_AT_calling_convention attributes are only meant | |
16988 | to describe functions' calling conventions. | |
16989 | ||
16990 | However, because it's a necessary piece of information in | |
0c1b455e TT |
16991 | Fortran, and before DWARF 4 DW_CC_program was the only |
16992 | piece of debugging information whose definition refers to | |
16993 | a 'main program' at all, several compilers marked Fortran | |
16994 | main programs with DW_CC_program --- even when those | |
16995 | functions use the standard calling conventions. | |
16996 | ||
16997 | Although DWARF now specifies a way to provide this | |
16998 | information, we support this practice for backward | |
16999 | compatibility. */ | |
68511cec | 17000 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
17001 | && cu->language == language_fortran) |
17002 | part_die->main_subprogram = 1; | |
68511cec | 17003 | break; |
481860b3 GB |
17004 | case DW_AT_inline: |
17005 | if (DW_UNSND (&attr) == DW_INL_inlined | |
17006 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
17007 | part_die->may_be_inlined = 1; | |
17008 | break; | |
95554aad TT |
17009 | |
17010 | case DW_AT_import: | |
17011 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 17012 | { |
9c541725 | 17013 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
17014 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
17015 | || cu->per_cu->is_dwz); | |
17016 | } | |
95554aad TT |
17017 | break; |
17018 | ||
0c1b455e TT |
17019 | case DW_AT_main_subprogram: |
17020 | part_die->main_subprogram = DW_UNSND (&attr); | |
17021 | break; | |
17022 | ||
c906108c SS |
17023 | default: |
17024 | break; | |
17025 | } | |
17026 | } | |
17027 | ||
91da1414 MW |
17028 | if (high_pc_relative) |
17029 | part_die->highpc += part_die->lowpc; | |
17030 | ||
9373cf26 JK |
17031 | if (has_low_pc_attr && has_high_pc_attr) |
17032 | { | |
17033 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
17034 | eliminate duplicate copies of functions and vtables and such. | |
17035 | The linker will arbitrarily choose one and discard the others. | |
17036 | The AT_*_pc values for such functions refer to local labels in | |
17037 | these sections. If the section from that file was discarded, the | |
17038 | labels are not in the output, so the relocs get a value of 0. | |
17039 | If this is a discarded function, mark the pc bounds as invalid, | |
17040 | so that GDB will ignore it. */ | |
17041 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
17042 | { | |
bb5ed363 | 17043 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17044 | |
17045 | complaint (&symfile_complaints, | |
17046 | _("DW_AT_low_pc %s is zero " | |
17047 | "for DIE at 0x%x [in module %s]"), | |
17048 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 17049 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
17050 | } |
17051 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
17052 | else if (part_die->lowpc >= part_die->highpc) | |
17053 | { | |
bb5ed363 | 17054 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
17055 | |
17056 | complaint (&symfile_complaints, | |
17057 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
17058 | "for DIE at 0x%x [in module %s]"), | |
17059 | paddress (gdbarch, part_die->lowpc), | |
17060 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
17061 | to_underlying (part_die->sect_off), |
17062 | objfile_name (objfile)); | |
9373cf26 JK |
17063 | } |
17064 | else | |
17065 | part_die->has_pc_info = 1; | |
17066 | } | |
85cbf3d3 | 17067 | |
c906108c SS |
17068 | return info_ptr; |
17069 | } | |
17070 | ||
72bf9492 DJ |
17071 | /* Find a cached partial DIE at OFFSET in CU. */ |
17072 | ||
17073 | static struct partial_die_info * | |
9c541725 | 17074 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
17075 | { |
17076 | struct partial_die_info *lookup_die = NULL; | |
17077 | struct partial_die_info part_die; | |
17078 | ||
9c541725 | 17079 | part_die.sect_off = sect_off; |
9a3c8263 SM |
17080 | lookup_die = ((struct partial_die_info *) |
17081 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 17082 | to_underlying (sect_off))); |
72bf9492 | 17083 | |
72bf9492 DJ |
17084 | return lookup_die; |
17085 | } | |
17086 | ||
348e048f DE |
17087 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
17088 | except in the case of .debug_types DIEs which do not reference | |
17089 | outside their CU (they do however referencing other types via | |
55f1336d | 17090 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
17091 | |
17092 | static struct partial_die_info * | |
9c541725 | 17093 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 17094 | { |
bb5ed363 | 17095 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
17096 | struct dwarf2_per_cu_data *per_cu = NULL; |
17097 | struct partial_die_info *pd = NULL; | |
72bf9492 | 17098 | |
36586728 | 17099 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 17100 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 17101 | { |
9c541725 | 17102 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
17103 | if (pd != NULL) |
17104 | return pd; | |
0d99eb77 DE |
17105 | /* We missed recording what we needed. |
17106 | Load all dies and try again. */ | |
17107 | per_cu = cu->per_cu; | |
5afb4e99 | 17108 | } |
0d99eb77 DE |
17109 | else |
17110 | { | |
17111 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 17112 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 17113 | { |
9c541725 PA |
17114 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
17115 | " external reference to offset 0x%x [in module %s].\n"), | |
17116 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
17117 | bfd_get_filename (objfile->obfd)); |
17118 | } | |
9c541725 | 17119 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 17120 | objfile); |
72bf9492 | 17121 | |
0d99eb77 DE |
17122 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
17123 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 17124 | |
0d99eb77 | 17125 | per_cu->cu->last_used = 0; |
9c541725 | 17126 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 17127 | } |
5afb4e99 | 17128 | |
dee91e82 DE |
17129 | /* If we didn't find it, and not all dies have been loaded, |
17130 | load them all and try again. */ | |
17131 | ||
5afb4e99 DJ |
17132 | if (pd == NULL && per_cu->load_all_dies == 0) |
17133 | { | |
5afb4e99 | 17134 | per_cu->load_all_dies = 1; |
fd820528 DE |
17135 | |
17136 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
17137 | THIS_CU->cu may already be in use. So we can't just free it and | |
17138 | replace its DIEs with the ones we read in. Instead, we leave those | |
17139 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
17140 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
17141 | set. */ | |
dee91e82 | 17142 | load_partial_comp_unit (per_cu); |
5afb4e99 | 17143 | |
9c541725 | 17144 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
17145 | } |
17146 | ||
17147 | if (pd == NULL) | |
17148 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
17149 | _("could not find partial DIE 0x%x " |
17150 | "in cache [from module %s]\n"), | |
9c541725 | 17151 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 17152 | return pd; |
72bf9492 DJ |
17153 | } |
17154 | ||
abc72ce4 DE |
17155 | /* See if we can figure out if the class lives in a namespace. We do |
17156 | this by looking for a member function; its demangled name will | |
17157 | contain namespace info, if there is any. */ | |
17158 | ||
17159 | static void | |
17160 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
17161 | struct dwarf2_cu *cu) | |
17162 | { | |
17163 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
17164 | what template types look like, because the demangler | |
17165 | frequently doesn't give the same name as the debug info. We | |
17166 | could fix this by only using the demangled name to get the | |
17167 | prefix (but see comment in read_structure_type). */ | |
17168 | ||
17169 | struct partial_die_info *real_pdi; | |
17170 | struct partial_die_info *child_pdi; | |
17171 | ||
17172 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
17173 | we should not do this. We'll prepend the parent's fully qualified | |
17174 | name when we create the partial symbol. */ | |
17175 | ||
17176 | real_pdi = struct_pdi; | |
17177 | while (real_pdi->has_specification) | |
36586728 TT |
17178 | real_pdi = find_partial_die (real_pdi->spec_offset, |
17179 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
17180 | |
17181 | if (real_pdi->die_parent != NULL) | |
17182 | return; | |
17183 | ||
17184 | for (child_pdi = struct_pdi->die_child; | |
17185 | child_pdi != NULL; | |
17186 | child_pdi = child_pdi->die_sibling) | |
17187 | { | |
17188 | if (child_pdi->tag == DW_TAG_subprogram | |
17189 | && child_pdi->linkage_name != NULL) | |
17190 | { | |
17191 | char *actual_class_name | |
17192 | = language_class_name_from_physname (cu->language_defn, | |
17193 | child_pdi->linkage_name); | |
17194 | if (actual_class_name != NULL) | |
17195 | { | |
17196 | struct_pdi->name | |
224c3ddb SM |
17197 | = ((const char *) |
17198 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17199 | actual_class_name, | |
17200 | strlen (actual_class_name))); | |
abc72ce4 DE |
17201 | xfree (actual_class_name); |
17202 | } | |
17203 | break; | |
17204 | } | |
17205 | } | |
17206 | } | |
17207 | ||
72bf9492 DJ |
17208 | /* Adjust PART_DIE before generating a symbol for it. This function |
17209 | may set the is_external flag or change the DIE's name. */ | |
17210 | ||
17211 | static void | |
17212 | fixup_partial_die (struct partial_die_info *part_die, | |
17213 | struct dwarf2_cu *cu) | |
17214 | { | |
abc72ce4 DE |
17215 | /* Once we've fixed up a die, there's no point in doing so again. |
17216 | This also avoids a memory leak if we were to call | |
17217 | guess_partial_die_structure_name multiple times. */ | |
17218 | if (part_die->fixup_called) | |
17219 | return; | |
17220 | ||
72bf9492 DJ |
17221 | /* If we found a reference attribute and the DIE has no name, try |
17222 | to find a name in the referred to DIE. */ | |
17223 | ||
17224 | if (part_die->name == NULL && part_die->has_specification) | |
17225 | { | |
17226 | struct partial_die_info *spec_die; | |
72bf9492 | 17227 | |
36586728 TT |
17228 | spec_die = find_partial_die (part_die->spec_offset, |
17229 | part_die->spec_is_dwz, cu); | |
72bf9492 | 17230 | |
10b3939b | 17231 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
17232 | |
17233 | if (spec_die->name) | |
17234 | { | |
17235 | part_die->name = spec_die->name; | |
17236 | ||
17237 | /* Copy DW_AT_external attribute if it is set. */ | |
17238 | if (spec_die->is_external) | |
17239 | part_die->is_external = spec_die->is_external; | |
17240 | } | |
17241 | } | |
17242 | ||
17243 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
17244 | |
17245 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 17246 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 17247 | |
abc72ce4 DE |
17248 | /* If there is no parent die to provide a namespace, and there are |
17249 | children, see if we can determine the namespace from their linkage | |
122d1940 | 17250 | name. */ |
abc72ce4 | 17251 | if (cu->language == language_cplus |
8b70b953 | 17252 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17253 | && part_die->die_parent == NULL |
17254 | && part_die->has_children | |
17255 | && (part_die->tag == DW_TAG_class_type | |
17256 | || part_die->tag == DW_TAG_structure_type | |
17257 | || part_die->tag == DW_TAG_union_type)) | |
17258 | guess_partial_die_structure_name (part_die, cu); | |
17259 | ||
53832f31 TT |
17260 | /* GCC might emit a nameless struct or union that has a linkage |
17261 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17262 | if (part_die->name == NULL | |
96408a79 SA |
17263 | && (part_die->tag == DW_TAG_class_type |
17264 | || part_die->tag == DW_TAG_interface_type | |
17265 | || part_die->tag == DW_TAG_structure_type | |
17266 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
17267 | && part_die->linkage_name != NULL) |
17268 | { | |
17269 | char *demangled; | |
17270 | ||
8de20a37 | 17271 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
17272 | if (demangled) |
17273 | { | |
96408a79 SA |
17274 | const char *base; |
17275 | ||
17276 | /* Strip any leading namespaces/classes, keep only the base name. | |
17277 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17278 | base = strrchr (demangled, ':'); | |
17279 | if (base && base > demangled && base[-1] == ':') | |
17280 | base++; | |
17281 | else | |
17282 | base = demangled; | |
17283 | ||
34a68019 | 17284 | part_die->name |
224c3ddb SM |
17285 | = ((const char *) |
17286 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
17287 | base, strlen (base))); | |
53832f31 TT |
17288 | xfree (demangled); |
17289 | } | |
17290 | } | |
17291 | ||
abc72ce4 | 17292 | part_die->fixup_called = 1; |
72bf9492 DJ |
17293 | } |
17294 | ||
a8329558 | 17295 | /* Read an attribute value described by an attribute form. */ |
c906108c | 17296 | |
d521ce57 | 17297 | static const gdb_byte * |
dee91e82 DE |
17298 | read_attribute_value (const struct die_reader_specs *reader, |
17299 | struct attribute *attr, unsigned form, | |
43988095 | 17300 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 17301 | { |
dee91e82 | 17302 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
17303 | struct objfile *objfile = cu->objfile; |
17304 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 17305 | bfd *abfd = reader->abfd; |
e7c27a73 | 17306 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17307 | unsigned int bytes_read; |
17308 | struct dwarf_block *blk; | |
17309 | ||
aead7601 | 17310 | attr->form = (enum dwarf_form) form; |
a8329558 | 17311 | switch (form) |
c906108c | 17312 | { |
c906108c | 17313 | case DW_FORM_ref_addr: |
ae411497 | 17314 | if (cu->header.version == 2) |
4568ecf9 | 17315 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 17316 | else |
4568ecf9 DE |
17317 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
17318 | &cu->header, &bytes_read); | |
ae411497 TT |
17319 | info_ptr += bytes_read; |
17320 | break; | |
36586728 TT |
17321 | case DW_FORM_GNU_ref_alt: |
17322 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17323 | info_ptr += bytes_read; | |
17324 | break; | |
ae411497 | 17325 | case DW_FORM_addr: |
e7c27a73 | 17326 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 17327 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 17328 | info_ptr += bytes_read; |
c906108c SS |
17329 | break; |
17330 | case DW_FORM_block2: | |
7b5a2f43 | 17331 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17332 | blk->size = read_2_bytes (abfd, info_ptr); |
17333 | info_ptr += 2; | |
17334 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17335 | info_ptr += blk->size; | |
17336 | DW_BLOCK (attr) = blk; | |
17337 | break; | |
17338 | case DW_FORM_block4: | |
7b5a2f43 | 17339 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17340 | blk->size = read_4_bytes (abfd, info_ptr); |
17341 | info_ptr += 4; | |
17342 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17343 | info_ptr += blk->size; | |
17344 | DW_BLOCK (attr) = blk; | |
17345 | break; | |
17346 | case DW_FORM_data2: | |
17347 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
17348 | info_ptr += 2; | |
17349 | break; | |
17350 | case DW_FORM_data4: | |
17351 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
17352 | info_ptr += 4; | |
17353 | break; | |
17354 | case DW_FORM_data8: | |
17355 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
17356 | info_ptr += 8; | |
17357 | break; | |
0224619f JK |
17358 | case DW_FORM_data16: |
17359 | blk = dwarf_alloc_block (cu); | |
17360 | blk->size = 16; | |
17361 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
17362 | info_ptr += 16; | |
17363 | DW_BLOCK (attr) = blk; | |
17364 | break; | |
2dc7f7b3 TT |
17365 | case DW_FORM_sec_offset: |
17366 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
17367 | info_ptr += bytes_read; | |
17368 | break; | |
c906108c | 17369 | case DW_FORM_string: |
9b1c24c8 | 17370 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 17371 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
17372 | info_ptr += bytes_read; |
17373 | break; | |
4bdf3d34 | 17374 | case DW_FORM_strp: |
36586728 TT |
17375 | if (!cu->per_cu->is_dwz) |
17376 | { | |
17377 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
17378 | &bytes_read); | |
17379 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17380 | info_ptr += bytes_read; | |
17381 | break; | |
17382 | } | |
17383 | /* FALLTHROUGH */ | |
43988095 JK |
17384 | case DW_FORM_line_strp: |
17385 | if (!cu->per_cu->is_dwz) | |
17386 | { | |
17387 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
17388 | cu_header, &bytes_read); | |
17389 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17390 | info_ptr += bytes_read; | |
17391 | break; | |
17392 | } | |
17393 | /* FALLTHROUGH */ | |
36586728 TT |
17394 | case DW_FORM_GNU_strp_alt: |
17395 | { | |
17396 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17397 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
17398 | &bytes_read); | |
17399 | ||
17400 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
17401 | DW_STRING_IS_CANONICAL (attr) = 0; | |
17402 | info_ptr += bytes_read; | |
17403 | } | |
4bdf3d34 | 17404 | break; |
2dc7f7b3 | 17405 | case DW_FORM_exprloc: |
c906108c | 17406 | case DW_FORM_block: |
7b5a2f43 | 17407 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17408 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17409 | info_ptr += bytes_read; | |
17410 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17411 | info_ptr += blk->size; | |
17412 | DW_BLOCK (attr) = blk; | |
17413 | break; | |
17414 | case DW_FORM_block1: | |
7b5a2f43 | 17415 | blk = dwarf_alloc_block (cu); |
c906108c SS |
17416 | blk->size = read_1_byte (abfd, info_ptr); |
17417 | info_ptr += 1; | |
17418 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
17419 | info_ptr += blk->size; | |
17420 | DW_BLOCK (attr) = blk; | |
17421 | break; | |
17422 | case DW_FORM_data1: | |
17423 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17424 | info_ptr += 1; | |
17425 | break; | |
17426 | case DW_FORM_flag: | |
17427 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
17428 | info_ptr += 1; | |
17429 | break; | |
2dc7f7b3 TT |
17430 | case DW_FORM_flag_present: |
17431 | DW_UNSND (attr) = 1; | |
17432 | break; | |
c906108c SS |
17433 | case DW_FORM_sdata: |
17434 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17435 | info_ptr += bytes_read; | |
17436 | break; | |
17437 | case DW_FORM_udata: | |
17438 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17439 | info_ptr += bytes_read; | |
17440 | break; | |
17441 | case DW_FORM_ref1: | |
9c541725 | 17442 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17443 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
17444 | info_ptr += 1; |
17445 | break; | |
17446 | case DW_FORM_ref2: | |
9c541725 | 17447 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17448 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
17449 | info_ptr += 2; |
17450 | break; | |
17451 | case DW_FORM_ref4: | |
9c541725 | 17452 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17453 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
17454 | info_ptr += 4; |
17455 | break; | |
613e1657 | 17456 | case DW_FORM_ref8: |
9c541725 | 17457 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17458 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
17459 | info_ptr += 8; |
17460 | break; | |
55f1336d | 17461 | case DW_FORM_ref_sig8: |
ac9ec31b | 17462 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
17463 | info_ptr += 8; |
17464 | break; | |
c906108c | 17465 | case DW_FORM_ref_udata: |
9c541725 | 17466 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 17467 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
17468 | info_ptr += bytes_read; |
17469 | break; | |
c906108c | 17470 | case DW_FORM_indirect: |
a8329558 KW |
17471 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17472 | info_ptr += bytes_read; | |
43988095 JK |
17473 | if (form == DW_FORM_implicit_const) |
17474 | { | |
17475 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
17476 | info_ptr += bytes_read; | |
17477 | } | |
17478 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
17479 | info_ptr); | |
17480 | break; | |
17481 | case DW_FORM_implicit_const: | |
17482 | DW_SND (attr) = implicit_const; | |
a8329558 | 17483 | break; |
3019eac3 DE |
17484 | case DW_FORM_GNU_addr_index: |
17485 | if (reader->dwo_file == NULL) | |
17486 | { | |
17487 | /* For now flag a hard error. | |
17488 | Later we can turn this into a complaint. */ | |
17489 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17490 | dwarf_form_name (form), | |
17491 | bfd_get_filename (abfd)); | |
17492 | } | |
17493 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
17494 | info_ptr += bytes_read; | |
17495 | break; | |
17496 | case DW_FORM_GNU_str_index: | |
17497 | if (reader->dwo_file == NULL) | |
17498 | { | |
17499 | /* For now flag a hard error. | |
17500 | Later we can turn this into a complaint if warranted. */ | |
17501 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
17502 | dwarf_form_name (form), | |
17503 | bfd_get_filename (abfd)); | |
17504 | } | |
17505 | { | |
17506 | ULONGEST str_index = | |
17507 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
17508 | ||
342587c4 | 17509 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
17510 | DW_STRING_IS_CANONICAL (attr) = 0; |
17511 | info_ptr += bytes_read; | |
17512 | } | |
17513 | break; | |
c906108c | 17514 | default: |
8a3fe4f8 | 17515 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
17516 | dwarf_form_name (form), |
17517 | bfd_get_filename (abfd)); | |
c906108c | 17518 | } |
28e94949 | 17519 | |
36586728 | 17520 | /* Super hack. */ |
7771576e | 17521 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
17522 | attr->form = DW_FORM_GNU_ref_alt; |
17523 | ||
28e94949 JB |
17524 | /* We have seen instances where the compiler tried to emit a byte |
17525 | size attribute of -1 which ended up being encoded as an unsigned | |
17526 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
17527 | an object of this size seems pretty unlikely so we can relatively | |
17528 | safely treat these cases as if the size attribute was invalid and | |
17529 | treat them as zero by default. */ | |
17530 | if (attr->name == DW_AT_byte_size | |
17531 | && form == DW_FORM_data4 | |
17532 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
17533 | { |
17534 | complaint | |
17535 | (&symfile_complaints, | |
43bbcdc2 PH |
17536 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
17537 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
17538 | DW_UNSND (attr) = 0; |
17539 | } | |
28e94949 | 17540 | |
c906108c SS |
17541 | return info_ptr; |
17542 | } | |
17543 | ||
a8329558 KW |
17544 | /* Read an attribute described by an abbreviated attribute. */ |
17545 | ||
d521ce57 | 17546 | static const gdb_byte * |
dee91e82 DE |
17547 | read_attribute (const struct die_reader_specs *reader, |
17548 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 17549 | const gdb_byte *info_ptr) |
a8329558 KW |
17550 | { |
17551 | attr->name = abbrev->name; | |
43988095 JK |
17552 | return read_attribute_value (reader, attr, abbrev->form, |
17553 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
17554 | } |
17555 | ||
0963b4bd | 17556 | /* Read dwarf information from a buffer. */ |
c906108c SS |
17557 | |
17558 | static unsigned int | |
a1855c1d | 17559 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17560 | { |
fe1b8b76 | 17561 | return bfd_get_8 (abfd, buf); |
c906108c SS |
17562 | } |
17563 | ||
17564 | static int | |
a1855c1d | 17565 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17566 | { |
fe1b8b76 | 17567 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
17568 | } |
17569 | ||
17570 | static unsigned int | |
a1855c1d | 17571 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17572 | { |
fe1b8b76 | 17573 | return bfd_get_16 (abfd, buf); |
c906108c SS |
17574 | } |
17575 | ||
21ae7a4d | 17576 | static int |
a1855c1d | 17577 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17578 | { |
17579 | return bfd_get_signed_16 (abfd, buf); | |
17580 | } | |
17581 | ||
c906108c | 17582 | static unsigned int |
a1855c1d | 17583 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17584 | { |
fe1b8b76 | 17585 | return bfd_get_32 (abfd, buf); |
c906108c SS |
17586 | } |
17587 | ||
21ae7a4d | 17588 | static int |
a1855c1d | 17589 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17590 | { |
17591 | return bfd_get_signed_32 (abfd, buf); | |
17592 | } | |
17593 | ||
93311388 | 17594 | static ULONGEST |
a1855c1d | 17595 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17596 | { |
fe1b8b76 | 17597 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17598 | } |
17599 | ||
17600 | static CORE_ADDR | |
d521ce57 | 17601 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17602 | unsigned int *bytes_read) |
c906108c | 17603 | { |
e7c27a73 | 17604 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17605 | CORE_ADDR retval = 0; |
17606 | ||
107d2387 | 17607 | if (cu_header->signed_addr_p) |
c906108c | 17608 | { |
107d2387 AC |
17609 | switch (cu_header->addr_size) |
17610 | { | |
17611 | case 2: | |
fe1b8b76 | 17612 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17613 | break; |
17614 | case 4: | |
fe1b8b76 | 17615 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17616 | break; |
17617 | case 8: | |
fe1b8b76 | 17618 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17619 | break; |
17620 | default: | |
8e65ff28 | 17621 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17622 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17623 | bfd_get_filename (abfd)); |
107d2387 AC |
17624 | } |
17625 | } | |
17626 | else | |
17627 | { | |
17628 | switch (cu_header->addr_size) | |
17629 | { | |
17630 | case 2: | |
fe1b8b76 | 17631 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17632 | break; |
17633 | case 4: | |
fe1b8b76 | 17634 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17635 | break; |
17636 | case 8: | |
fe1b8b76 | 17637 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17638 | break; |
17639 | default: | |
8e65ff28 | 17640 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17641 | _("read_address: bad switch, " |
17642 | "unsigned [in module %s]"), | |
659b0389 | 17643 | bfd_get_filename (abfd)); |
107d2387 | 17644 | } |
c906108c | 17645 | } |
64367e0a | 17646 | |
107d2387 AC |
17647 | *bytes_read = cu_header->addr_size; |
17648 | return retval; | |
c906108c SS |
17649 | } |
17650 | ||
f7ef9339 | 17651 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17652 | specification allows the initial length to take up either 4 bytes |
17653 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17654 | bytes describe the length and all offsets will be 8 bytes in length | |
17655 | instead of 4. | |
17656 | ||
f7ef9339 KB |
17657 | An older, non-standard 64-bit format is also handled by this |
17658 | function. The older format in question stores the initial length | |
17659 | as an 8-byte quantity without an escape value. Lengths greater | |
17660 | than 2^32 aren't very common which means that the initial 4 bytes | |
17661 | is almost always zero. Since a length value of zero doesn't make | |
17662 | sense for the 32-bit format, this initial zero can be considered to | |
17663 | be an escape value which indicates the presence of the older 64-bit | |
17664 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
17665 | greater than 4GB. If it becomes necessary to handle lengths |
17666 | somewhat larger than 4GB, we could allow other small values (such | |
17667 | as the non-sensical values of 1, 2, and 3) to also be used as | |
17668 | escape values indicating the presence of the old format. | |
f7ef9339 | 17669 | |
917c78fc MK |
17670 | The value returned via bytes_read should be used to increment the |
17671 | relevant pointer after calling read_initial_length(). | |
c764a876 | 17672 | |
613e1657 KB |
17673 | [ Note: read_initial_length() and read_offset() are based on the |
17674 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 17675 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
17676 | from: |
17677 | ||
f7ef9339 | 17678 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 17679 | |
613e1657 KB |
17680 | This document is only a draft and is subject to change. (So beware.) |
17681 | ||
f7ef9339 | 17682 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
17683 | determined empirically by examining 64-bit ELF files produced by |
17684 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
17685 | |
17686 | - Kevin, July 16, 2002 | |
613e1657 KB |
17687 | ] */ |
17688 | ||
17689 | static LONGEST | |
d521ce57 | 17690 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 17691 | { |
fe1b8b76 | 17692 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 17693 | |
dd373385 | 17694 | if (length == 0xffffffff) |
613e1657 | 17695 | { |
fe1b8b76 | 17696 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 17697 | *bytes_read = 12; |
613e1657 | 17698 | } |
dd373385 | 17699 | else if (length == 0) |
f7ef9339 | 17700 | { |
dd373385 | 17701 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 17702 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 17703 | *bytes_read = 8; |
f7ef9339 | 17704 | } |
613e1657 KB |
17705 | else |
17706 | { | |
17707 | *bytes_read = 4; | |
613e1657 KB |
17708 | } |
17709 | ||
c764a876 DE |
17710 | return length; |
17711 | } | |
dd373385 | 17712 | |
c764a876 DE |
17713 | /* Cover function for read_initial_length. |
17714 | Returns the length of the object at BUF, and stores the size of the | |
17715 | initial length in *BYTES_READ and stores the size that offsets will be in | |
17716 | *OFFSET_SIZE. | |
17717 | If the initial length size is not equivalent to that specified in | |
17718 | CU_HEADER then issue a complaint. | |
17719 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 17720 | |
c764a876 | 17721 | static LONGEST |
d521ce57 | 17722 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
17723 | const struct comp_unit_head *cu_header, |
17724 | unsigned int *bytes_read, | |
17725 | unsigned int *offset_size) | |
17726 | { | |
17727 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
17728 | ||
17729 | gdb_assert (cu_header->initial_length_size == 4 | |
17730 | || cu_header->initial_length_size == 8 | |
17731 | || cu_header->initial_length_size == 12); | |
17732 | ||
17733 | if (cu_header->initial_length_size != *bytes_read) | |
17734 | complaint (&symfile_complaints, | |
17735 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 17736 | |
c764a876 | 17737 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 17738 | return length; |
613e1657 KB |
17739 | } |
17740 | ||
17741 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 17742 | given by cu_header->offset_size. */ |
613e1657 KB |
17743 | |
17744 | static LONGEST | |
d521ce57 TT |
17745 | read_offset (bfd *abfd, const gdb_byte *buf, |
17746 | const struct comp_unit_head *cu_header, | |
891d2f0b | 17747 | unsigned int *bytes_read) |
c764a876 DE |
17748 | { |
17749 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 17750 | |
c764a876 DE |
17751 | *bytes_read = cu_header->offset_size; |
17752 | return offset; | |
17753 | } | |
17754 | ||
17755 | /* Read an offset from the data stream. */ | |
17756 | ||
17757 | static LONGEST | |
d521ce57 | 17758 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
17759 | { |
17760 | LONGEST retval = 0; | |
17761 | ||
c764a876 | 17762 | switch (offset_size) |
613e1657 KB |
17763 | { |
17764 | case 4: | |
fe1b8b76 | 17765 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
17766 | break; |
17767 | case 8: | |
fe1b8b76 | 17768 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
17769 | break; |
17770 | default: | |
8e65ff28 | 17771 | internal_error (__FILE__, __LINE__, |
c764a876 | 17772 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 17773 | bfd_get_filename (abfd)); |
613e1657 KB |
17774 | } |
17775 | ||
917c78fc | 17776 | return retval; |
613e1657 KB |
17777 | } |
17778 | ||
d521ce57 TT |
17779 | static const gdb_byte * |
17780 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
17781 | { |
17782 | /* If the size of a host char is 8 bits, we can return a pointer | |
17783 | to the buffer, otherwise we have to copy the data to a buffer | |
17784 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17785 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 17786 | return buf; |
c906108c SS |
17787 | } |
17788 | ||
d521ce57 TT |
17789 | static const char * |
17790 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
17791 | unsigned int *bytes_read_ptr) | |
c906108c SS |
17792 | { |
17793 | /* If the size of a host char is 8 bits, we can return a pointer | |
17794 | to the string, otherwise we have to copy the string to a buffer | |
17795 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17796 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
17797 | if (*buf == '\0') |
17798 | { | |
17799 | *bytes_read_ptr = 1; | |
17800 | return NULL; | |
17801 | } | |
d521ce57 TT |
17802 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
17803 | return (const char *) buf; | |
4bdf3d34 JJ |
17804 | } |
17805 | ||
43988095 JK |
17806 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
17807 | reporting strings FORM_NAME and SECT_NAME. */ | |
17808 | ||
d521ce57 | 17809 | static const char * |
43988095 JK |
17810 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
17811 | struct dwarf2_section_info *sect, | |
17812 | const char *form_name, | |
17813 | const char *sect_name) | |
17814 | { | |
17815 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
17816 | if (sect->buffer == NULL) | |
17817 | error (_("%s used without %s section [in module %s]"), | |
17818 | form_name, sect_name, bfd_get_filename (abfd)); | |
17819 | if (str_offset >= sect->size) | |
17820 | error (_("%s pointing outside of %s section [in module %s]"), | |
17821 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 17822 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 17823 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 17824 | return NULL; |
43988095 JK |
17825 | return (const char *) (sect->buffer + str_offset); |
17826 | } | |
17827 | ||
17828 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
17829 | ||
17830 | static const char * | |
17831 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17832 | { | |
17833 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17834 | &dwarf2_per_objfile->str, | |
17835 | "DW_FORM_strp", ".debug_str"); | |
17836 | } | |
17837 | ||
17838 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
17839 | ||
17840 | static const char * | |
17841 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17842 | { | |
17843 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17844 | &dwarf2_per_objfile->line_str, | |
17845 | "DW_FORM_line_strp", | |
17846 | ".debug_line_str"); | |
c906108c SS |
17847 | } |
17848 | ||
36586728 TT |
17849 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
17850 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
17851 | the string consists of a single NUL byte, return NULL; otherwise | |
17852 | return a pointer to the string. */ | |
17853 | ||
d521ce57 | 17854 | static const char * |
36586728 TT |
17855 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
17856 | { | |
17857 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
17858 | ||
17859 | if (dwz->str.buffer == NULL) | |
17860 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
17861 | "section [in module %s]"), | |
17862 | bfd_get_filename (dwz->dwz_bfd)); | |
17863 | if (str_offset >= dwz->str.size) | |
17864 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
17865 | ".debug_str section [in module %s]"), | |
17866 | bfd_get_filename (dwz->dwz_bfd)); | |
17867 | gdb_assert (HOST_CHAR_BIT == 8); | |
17868 | if (dwz->str.buffer[str_offset] == '\0') | |
17869 | return NULL; | |
d521ce57 | 17870 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
17871 | } |
17872 | ||
43988095 JK |
17873 | /* Return pointer to string at .debug_str offset as read from BUF. |
17874 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17875 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17876 | ||
d521ce57 TT |
17877 | static const char * |
17878 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
17879 | const struct comp_unit_head *cu_header, |
17880 | unsigned int *bytes_read_ptr) | |
17881 | { | |
17882 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17883 | ||
17884 | return read_indirect_string_at_offset (abfd, str_offset); | |
17885 | } | |
17886 | ||
43988095 JK |
17887 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
17888 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17889 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17890 | ||
17891 | static const char * | |
17892 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
17893 | const struct comp_unit_head *cu_header, | |
17894 | unsigned int *bytes_read_ptr) | |
17895 | { | |
17896 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17897 | ||
17898 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
17899 | } | |
17900 | ||
17901 | ULONGEST | |
d521ce57 | 17902 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 17903 | unsigned int *bytes_read_ptr) |
c906108c | 17904 | { |
12df843f | 17905 | ULONGEST result; |
ce5d95e1 | 17906 | unsigned int num_read; |
870f88f7 | 17907 | int shift; |
c906108c SS |
17908 | unsigned char byte; |
17909 | ||
17910 | result = 0; | |
17911 | shift = 0; | |
17912 | num_read = 0; | |
c906108c SS |
17913 | while (1) |
17914 | { | |
fe1b8b76 | 17915 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17916 | buf++; |
17917 | num_read++; | |
12df843f | 17918 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
17919 | if ((byte & 128) == 0) |
17920 | { | |
17921 | break; | |
17922 | } | |
17923 | shift += 7; | |
17924 | } | |
17925 | *bytes_read_ptr = num_read; | |
17926 | return result; | |
17927 | } | |
17928 | ||
12df843f | 17929 | static LONGEST |
d521ce57 TT |
17930 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
17931 | unsigned int *bytes_read_ptr) | |
c906108c | 17932 | { |
12df843f | 17933 | LONGEST result; |
870f88f7 | 17934 | int shift, num_read; |
c906108c SS |
17935 | unsigned char byte; |
17936 | ||
17937 | result = 0; | |
17938 | shift = 0; | |
c906108c | 17939 | num_read = 0; |
c906108c SS |
17940 | while (1) |
17941 | { | |
fe1b8b76 | 17942 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17943 | buf++; |
17944 | num_read++; | |
12df843f | 17945 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
17946 | shift += 7; |
17947 | if ((byte & 128) == 0) | |
17948 | { | |
17949 | break; | |
17950 | } | |
17951 | } | |
77e0b926 | 17952 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 17953 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
17954 | *bytes_read_ptr = num_read; |
17955 | return result; | |
17956 | } | |
17957 | ||
3019eac3 DE |
17958 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
17959 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
17960 | ADDR_SIZE is the size of addresses from the CU header. */ | |
17961 | ||
17962 | static CORE_ADDR | |
17963 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
17964 | { | |
17965 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17966 | bfd *abfd = objfile->obfd; | |
17967 | const gdb_byte *info_ptr; | |
17968 | ||
17969 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
17970 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
17971 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 17972 | objfile_name (objfile)); |
3019eac3 DE |
17973 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
17974 | error (_("DW_FORM_addr_index pointing outside of " | |
17975 | ".debug_addr section [in module %s]"), | |
4262abfb | 17976 | objfile_name (objfile)); |
3019eac3 DE |
17977 | info_ptr = (dwarf2_per_objfile->addr.buffer |
17978 | + addr_base + addr_index * addr_size); | |
17979 | if (addr_size == 4) | |
17980 | return bfd_get_32 (abfd, info_ptr); | |
17981 | else | |
17982 | return bfd_get_64 (abfd, info_ptr); | |
17983 | } | |
17984 | ||
17985 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
17986 | ||
17987 | static CORE_ADDR | |
17988 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
17989 | { | |
17990 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
17991 | } | |
17992 | ||
17993 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
17994 | ||
17995 | static CORE_ADDR | |
d521ce57 | 17996 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
17997 | unsigned int *bytes_read) |
17998 | { | |
17999 | bfd *abfd = cu->objfile->obfd; | |
18000 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
18001 | ||
18002 | return read_addr_index (cu, addr_index); | |
18003 | } | |
18004 | ||
18005 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
18006 | back to dwarf2_read_addr_index. */ | |
18007 | ||
18008 | struct dwarf2_read_addr_index_data | |
18009 | { | |
18010 | ULONGEST addr_base; | |
18011 | int addr_size; | |
18012 | }; | |
18013 | ||
18014 | /* die_reader_func for dwarf2_read_addr_index. */ | |
18015 | ||
18016 | static void | |
18017 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 18018 | const gdb_byte *info_ptr, |
3019eac3 DE |
18019 | struct die_info *comp_unit_die, |
18020 | int has_children, | |
18021 | void *data) | |
18022 | { | |
18023 | struct dwarf2_cu *cu = reader->cu; | |
18024 | struct dwarf2_read_addr_index_data *aidata = | |
18025 | (struct dwarf2_read_addr_index_data *) data; | |
18026 | ||
18027 | aidata->addr_base = cu->addr_base; | |
18028 | aidata->addr_size = cu->header.addr_size; | |
18029 | } | |
18030 | ||
18031 | /* Given an index in .debug_addr, fetch the value. | |
18032 | NOTE: This can be called during dwarf expression evaluation, | |
18033 | long after the debug information has been read, and thus per_cu->cu | |
18034 | may no longer exist. */ | |
18035 | ||
18036 | CORE_ADDR | |
18037 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
18038 | unsigned int addr_index) | |
18039 | { | |
18040 | struct objfile *objfile = per_cu->objfile; | |
18041 | struct dwarf2_cu *cu = per_cu->cu; | |
18042 | ULONGEST addr_base; | |
18043 | int addr_size; | |
18044 | ||
18045 | /* This is intended to be called from outside this file. */ | |
18046 | dw2_setup (objfile); | |
18047 | ||
18048 | /* We need addr_base and addr_size. | |
18049 | If we don't have PER_CU->cu, we have to get it. | |
18050 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18051 | which at this point doesn't seem justified: it's not clear how frequently | |
18052 | it would get used and it would increase the size of every PER_CU. | |
18053 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18054 | so we're not in uncharted territory here. | |
18055 | Alas we need to be a bit more complicated as addr_base is contained | |
18056 | in the DIE. | |
18057 | ||
18058 | We don't need to read the entire CU(/TU). | |
18059 | We just need the header and top level die. | |
a1b64ce1 | 18060 | |
3019eac3 | 18061 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18062 | For now we skip this optimization. */ |
3019eac3 DE |
18063 | |
18064 | if (cu != NULL) | |
18065 | { | |
18066 | addr_base = cu->addr_base; | |
18067 | addr_size = cu->header.addr_size; | |
18068 | } | |
18069 | else | |
18070 | { | |
18071 | struct dwarf2_read_addr_index_data aidata; | |
18072 | ||
a1b64ce1 DE |
18073 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
18074 | we need addr_base. */ | |
18075 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
18076 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
18077 | addr_base = aidata.addr_base; |
18078 | addr_size = aidata.addr_size; | |
18079 | } | |
18080 | ||
18081 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
18082 | } | |
18083 | ||
57d63ce2 DE |
18084 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
18085 | This is only used by the Fission support. */ | |
3019eac3 | 18086 | |
d521ce57 | 18087 | static const char * |
342587c4 | 18088 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
18089 | { |
18090 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 18091 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18092 | bfd *abfd = objfile->obfd; |
342587c4 | 18093 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
18094 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
18095 | struct dwarf2_section_info *str_offsets_section = | |
18096 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 18097 | const gdb_byte *info_ptr; |
3019eac3 | 18098 | ULONGEST str_offset; |
57d63ce2 | 18099 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 18100 | |
73869dc2 DE |
18101 | dwarf2_read_section (objfile, str_section); |
18102 | dwarf2_read_section (objfile, str_offsets_section); | |
18103 | if (str_section->buffer == NULL) | |
57d63ce2 | 18104 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
18105 | " in CU at offset 0x%x [in module %s]"), |
18106 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18107 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 18108 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
18109 | " in CU at offset 0x%x [in module %s]"), |
18110 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18111 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 18112 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
18113 | " section in CU at offset 0x%x [in module %s]"), |
18114 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18115 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
18116 | + str_index * cu->header.offset_size); |
18117 | if (cu->header.offset_size == 4) | |
18118 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18119 | else | |
18120 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18121 | if (str_offset >= str_section->size) |
57d63ce2 | 18122 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
18123 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
18124 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 18125 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
18126 | } |
18127 | ||
3019eac3 DE |
18128 | /* Return the length of an LEB128 number in BUF. */ |
18129 | ||
18130 | static int | |
18131 | leb128_size (const gdb_byte *buf) | |
18132 | { | |
18133 | const gdb_byte *begin = buf; | |
18134 | gdb_byte byte; | |
18135 | ||
18136 | while (1) | |
18137 | { | |
18138 | byte = *buf++; | |
18139 | if ((byte & 128) == 0) | |
18140 | return buf - begin; | |
18141 | } | |
18142 | } | |
18143 | ||
c906108c | 18144 | static void |
e142c38c | 18145 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
18146 | { |
18147 | switch (lang) | |
18148 | { | |
18149 | case DW_LANG_C89: | |
76bee0cc | 18150 | case DW_LANG_C99: |
0cfd832f | 18151 | case DW_LANG_C11: |
c906108c | 18152 | case DW_LANG_C: |
d1be3247 | 18153 | case DW_LANG_UPC: |
e142c38c | 18154 | cu->language = language_c; |
c906108c | 18155 | break; |
9c37b5ae | 18156 | case DW_LANG_Java: |
c906108c | 18157 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
18158 | case DW_LANG_C_plus_plus_11: |
18159 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 18160 | cu->language = language_cplus; |
c906108c | 18161 | break; |
6aecb9c2 JB |
18162 | case DW_LANG_D: |
18163 | cu->language = language_d; | |
18164 | break; | |
c906108c SS |
18165 | case DW_LANG_Fortran77: |
18166 | case DW_LANG_Fortran90: | |
b21b22e0 | 18167 | case DW_LANG_Fortran95: |
f7de9aab MW |
18168 | case DW_LANG_Fortran03: |
18169 | case DW_LANG_Fortran08: | |
e142c38c | 18170 | cu->language = language_fortran; |
c906108c | 18171 | break; |
a766d390 DE |
18172 | case DW_LANG_Go: |
18173 | cu->language = language_go; | |
18174 | break; | |
c906108c | 18175 | case DW_LANG_Mips_Assembler: |
e142c38c | 18176 | cu->language = language_asm; |
c906108c SS |
18177 | break; |
18178 | case DW_LANG_Ada83: | |
8aaf0b47 | 18179 | case DW_LANG_Ada95: |
bc5f45f8 JB |
18180 | cu->language = language_ada; |
18181 | break; | |
72019c9c GM |
18182 | case DW_LANG_Modula2: |
18183 | cu->language = language_m2; | |
18184 | break; | |
fe8e67fd PM |
18185 | case DW_LANG_Pascal83: |
18186 | cu->language = language_pascal; | |
18187 | break; | |
22566fbd DJ |
18188 | case DW_LANG_ObjC: |
18189 | cu->language = language_objc; | |
18190 | break; | |
c44af4eb TT |
18191 | case DW_LANG_Rust: |
18192 | case DW_LANG_Rust_old: | |
18193 | cu->language = language_rust; | |
18194 | break; | |
c906108c SS |
18195 | case DW_LANG_Cobol74: |
18196 | case DW_LANG_Cobol85: | |
c906108c | 18197 | default: |
e142c38c | 18198 | cu->language = language_minimal; |
c906108c SS |
18199 | break; |
18200 | } | |
e142c38c | 18201 | cu->language_defn = language_def (cu->language); |
c906108c SS |
18202 | } |
18203 | ||
18204 | /* Return the named attribute or NULL if not there. */ | |
18205 | ||
18206 | static struct attribute * | |
e142c38c | 18207 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 18208 | { |
a48e046c | 18209 | for (;;) |
c906108c | 18210 | { |
a48e046c TT |
18211 | unsigned int i; |
18212 | struct attribute *spec = NULL; | |
18213 | ||
18214 | for (i = 0; i < die->num_attrs; ++i) | |
18215 | { | |
18216 | if (die->attrs[i].name == name) | |
18217 | return &die->attrs[i]; | |
18218 | if (die->attrs[i].name == DW_AT_specification | |
18219 | || die->attrs[i].name == DW_AT_abstract_origin) | |
18220 | spec = &die->attrs[i]; | |
18221 | } | |
18222 | ||
18223 | if (!spec) | |
18224 | break; | |
c906108c | 18225 | |
f2f0e013 | 18226 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 18227 | } |
c5aa993b | 18228 | |
c906108c SS |
18229 | return NULL; |
18230 | } | |
18231 | ||
348e048f DE |
18232 | /* Return the named attribute or NULL if not there, |
18233 | but do not follow DW_AT_specification, etc. | |
18234 | This is for use in contexts where we're reading .debug_types dies. | |
18235 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
18236 | back up the chain, and we want to go down. */ | |
18237 | ||
18238 | static struct attribute * | |
45e58e77 | 18239 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
18240 | { |
18241 | unsigned int i; | |
18242 | ||
18243 | for (i = 0; i < die->num_attrs; ++i) | |
18244 | if (die->attrs[i].name == name) | |
18245 | return &die->attrs[i]; | |
18246 | ||
18247 | return NULL; | |
18248 | } | |
18249 | ||
7d45c7c3 KB |
18250 | /* Return the string associated with a string-typed attribute, or NULL if it |
18251 | is either not found or is of an incorrect type. */ | |
18252 | ||
18253 | static const char * | |
18254 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
18255 | { | |
18256 | struct attribute *attr; | |
18257 | const char *str = NULL; | |
18258 | ||
18259 | attr = dwarf2_attr (die, name, cu); | |
18260 | ||
18261 | if (attr != NULL) | |
18262 | { | |
43988095 | 18263 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
18264 | || attr->form == DW_FORM_string |
18265 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 18266 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
18267 | str = DW_STRING (attr); |
18268 | else | |
18269 | complaint (&symfile_complaints, | |
18270 | _("string type expected for attribute %s for " | |
18271 | "DIE at 0x%x in module %s"), | |
9c541725 | 18272 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
18273 | objfile_name (cu->objfile)); |
18274 | } | |
18275 | ||
18276 | return str; | |
18277 | } | |
18278 | ||
05cf31d1 JB |
18279 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
18280 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 18281 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
18282 | |
18283 | static int | |
18284 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
18285 | { | |
18286 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
18287 | ||
18288 | return (attr && DW_UNSND (attr)); | |
18289 | } | |
18290 | ||
3ca72b44 | 18291 | static int |
e142c38c | 18292 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 18293 | { |
05cf31d1 JB |
18294 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
18295 | which value is non-zero. However, we have to be careful with | |
18296 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
18297 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
18298 | end up accidently finding a declaration attribute that belongs | |
18299 | to a different DIE referenced by the specification attribute, | |
18300 | even though the given DIE does not have a declaration attribute. */ | |
18301 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
18302 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
18303 | } |
18304 | ||
63d06c5c | 18305 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 18306 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
18307 | containing the return value on output. If there is no |
18308 | specification, but there is an abstract origin, that is | |
18309 | returned. */ | |
63d06c5c DC |
18310 | |
18311 | static struct die_info * | |
f2f0e013 | 18312 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 18313 | { |
f2f0e013 DJ |
18314 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
18315 | *spec_cu); | |
63d06c5c | 18316 | |
edb3359d DJ |
18317 | if (spec_attr == NULL) |
18318 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
18319 | ||
63d06c5c DC |
18320 | if (spec_attr == NULL) |
18321 | return NULL; | |
18322 | else | |
f2f0e013 | 18323 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 18324 | } |
c906108c | 18325 | |
527f3840 JK |
18326 | /* Stub for free_line_header to match void * callback types. */ |
18327 | ||
18328 | static void | |
18329 | free_line_header_voidp (void *arg) | |
18330 | { | |
9a3c8263 | 18331 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 18332 | |
fff8551c | 18333 | delete lh; |
527f3840 JK |
18334 | } |
18335 | ||
fff8551c PA |
18336 | void |
18337 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 18338 | { |
27e0867f | 18339 | if (dwarf_line_debug >= 2) |
fff8551c PA |
18340 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
18341 | include_dirs.size () + 1, include_dir); | |
27e0867f | 18342 | |
fff8551c | 18343 | include_dirs.push_back (include_dir); |
debd256d | 18344 | } |
6e70227d | 18345 | |
fff8551c PA |
18346 | void |
18347 | line_header::add_file_name (const char *name, | |
ecfb656c | 18348 | dir_index d_index, |
fff8551c PA |
18349 | unsigned int mod_time, |
18350 | unsigned int length) | |
debd256d | 18351 | { |
27e0867f DE |
18352 | if (dwarf_line_debug >= 2) |
18353 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 18354 | (unsigned) file_names.size () + 1, name); |
27e0867f | 18355 | |
ecfb656c | 18356 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 18357 | } |
6e70227d | 18358 | |
83769d0b | 18359 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
18360 | |
18361 | static struct dwarf2_section_info * | |
18362 | get_debug_line_section (struct dwarf2_cu *cu) | |
18363 | { | |
18364 | struct dwarf2_section_info *section; | |
18365 | ||
18366 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
18367 | DWO file. */ | |
18368 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
18369 | section = &cu->dwo_unit->dwo_file->sections.line; | |
18370 | else if (cu->per_cu->is_dwz) | |
18371 | { | |
18372 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18373 | ||
18374 | section = &dwz->line; | |
18375 | } | |
18376 | else | |
18377 | section = &dwarf2_per_objfile->line; | |
18378 | ||
18379 | return section; | |
18380 | } | |
18381 | ||
43988095 JK |
18382 | /* Read directory or file name entry format, starting with byte of |
18383 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
18384 | entries count and the entries themselves in the described entry | |
18385 | format. */ | |
18386 | ||
18387 | static void | |
18388 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
18389 | struct line_header *lh, | |
18390 | const struct comp_unit_head *cu_header, | |
18391 | void (*callback) (struct line_header *lh, | |
18392 | const char *name, | |
ecfb656c | 18393 | dir_index d_index, |
43988095 JK |
18394 | unsigned int mod_time, |
18395 | unsigned int length)) | |
18396 | { | |
18397 | gdb_byte format_count, formati; | |
18398 | ULONGEST data_count, datai; | |
18399 | const gdb_byte *buf = *bufp; | |
18400 | const gdb_byte *format_header_data; | |
18401 | int i; | |
18402 | unsigned int bytes_read; | |
18403 | ||
18404 | format_count = read_1_byte (abfd, buf); | |
18405 | buf += 1; | |
18406 | format_header_data = buf; | |
18407 | for (formati = 0; formati < format_count; formati++) | |
18408 | { | |
18409 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18410 | buf += bytes_read; | |
18411 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18412 | buf += bytes_read; | |
18413 | } | |
18414 | ||
18415 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
18416 | buf += bytes_read; | |
18417 | for (datai = 0; datai < data_count; datai++) | |
18418 | { | |
18419 | const gdb_byte *format = format_header_data; | |
18420 | struct file_entry fe; | |
18421 | ||
43988095 JK |
18422 | for (formati = 0; formati < format_count; formati++) |
18423 | { | |
ecfb656c | 18424 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18425 | format += bytes_read; |
43988095 | 18426 | |
ecfb656c | 18427 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 18428 | format += bytes_read; |
ecfb656c PA |
18429 | |
18430 | gdb::optional<const char *> string; | |
18431 | gdb::optional<unsigned int> uint; | |
18432 | ||
43988095 JK |
18433 | switch (form) |
18434 | { | |
18435 | case DW_FORM_string: | |
ecfb656c | 18436 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
18437 | buf += bytes_read; |
18438 | break; | |
18439 | ||
18440 | case DW_FORM_line_strp: | |
ecfb656c PA |
18441 | string.emplace (read_indirect_line_string (abfd, buf, |
18442 | cu_header, | |
18443 | &bytes_read)); | |
43988095 JK |
18444 | buf += bytes_read; |
18445 | break; | |
18446 | ||
18447 | case DW_FORM_data1: | |
ecfb656c | 18448 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
18449 | buf += 1; |
18450 | break; | |
18451 | ||
18452 | case DW_FORM_data2: | |
ecfb656c | 18453 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
18454 | buf += 2; |
18455 | break; | |
18456 | ||
18457 | case DW_FORM_data4: | |
ecfb656c | 18458 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
18459 | buf += 4; |
18460 | break; | |
18461 | ||
18462 | case DW_FORM_data8: | |
ecfb656c | 18463 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
18464 | buf += 8; |
18465 | break; | |
18466 | ||
18467 | case DW_FORM_udata: | |
ecfb656c | 18468 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
18469 | buf += bytes_read; |
18470 | break; | |
18471 | ||
18472 | case DW_FORM_block: | |
18473 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
18474 | current GDB. */ | |
18475 | break; | |
18476 | } | |
ecfb656c PA |
18477 | |
18478 | switch (content_type) | |
18479 | { | |
18480 | case DW_LNCT_path: | |
18481 | if (string.has_value ()) | |
18482 | fe.name = *string; | |
18483 | break; | |
18484 | case DW_LNCT_directory_index: | |
18485 | if (uint.has_value ()) | |
18486 | fe.d_index = (dir_index) *uint; | |
18487 | break; | |
18488 | case DW_LNCT_timestamp: | |
18489 | if (uint.has_value ()) | |
18490 | fe.mod_time = *uint; | |
18491 | break; | |
18492 | case DW_LNCT_size: | |
18493 | if (uint.has_value ()) | |
18494 | fe.length = *uint; | |
18495 | break; | |
18496 | case DW_LNCT_MD5: | |
18497 | break; | |
18498 | default: | |
18499 | complaint (&symfile_complaints, | |
18500 | _("Unknown format content type %s"), | |
18501 | pulongest (content_type)); | |
18502 | } | |
43988095 JK |
18503 | } |
18504 | ||
ecfb656c | 18505 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
18506 | } |
18507 | ||
18508 | *bufp = buf; | |
18509 | } | |
18510 | ||
debd256d | 18511 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 18512 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 18513 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
18514 | Returns NULL if there is a problem reading the header, e.g., if it |
18515 | has a version we don't understand. | |
debd256d JB |
18516 | |
18517 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
18518 | the returned object point into the dwarf line section buffer, |
18519 | and must not be freed. */ | |
ae2de4f8 | 18520 | |
fff8551c | 18521 | static line_header_up |
9c541725 | 18522 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 18523 | { |
d521ce57 | 18524 | const gdb_byte *line_ptr; |
c764a876 | 18525 | unsigned int bytes_read, offset_size; |
debd256d | 18526 | int i; |
d521ce57 | 18527 | const char *cur_dir, *cur_file; |
3019eac3 DE |
18528 | struct dwarf2_section_info *section; |
18529 | bfd *abfd; | |
18530 | ||
36586728 | 18531 | section = get_debug_line_section (cu); |
3019eac3 DE |
18532 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
18533 | if (section->buffer == NULL) | |
debd256d | 18534 | { |
3019eac3 DE |
18535 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
18536 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
18537 | else | |
18538 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
18539 | return 0; |
18540 | } | |
18541 | ||
fceca515 DE |
18542 | /* We can't do this until we know the section is non-empty. |
18543 | Only then do we know we have such a section. */ | |
a32a8923 | 18544 | abfd = get_section_bfd_owner (section); |
fceca515 | 18545 | |
a738430d MK |
18546 | /* Make sure that at least there's room for the total_length field. |
18547 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 18548 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 18549 | { |
4d3c2250 | 18550 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18551 | return 0; |
18552 | } | |
18553 | ||
fff8551c | 18554 | line_header_up lh (new line_header ()); |
debd256d | 18555 | |
9c541725 | 18556 | lh->sect_off = sect_off; |
527f3840 JK |
18557 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
18558 | ||
9c541725 | 18559 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 18560 | |
a738430d | 18561 | /* Read in the header. */ |
6e70227d | 18562 | lh->total_length = |
c764a876 DE |
18563 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
18564 | &bytes_read, &offset_size); | |
debd256d | 18565 | line_ptr += bytes_read; |
3019eac3 | 18566 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 18567 | { |
4d3c2250 | 18568 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18569 | return 0; |
18570 | } | |
18571 | lh->statement_program_end = line_ptr + lh->total_length; | |
18572 | lh->version = read_2_bytes (abfd, line_ptr); | |
18573 | line_ptr += 2; | |
43988095 | 18574 | if (lh->version > 5) |
cd366ee8 DE |
18575 | { |
18576 | /* This is a version we don't understand. The format could have | |
18577 | changed in ways we don't handle properly so just punt. */ | |
18578 | complaint (&symfile_complaints, | |
18579 | _("unsupported version in .debug_line section")); | |
18580 | return NULL; | |
18581 | } | |
43988095 JK |
18582 | if (lh->version >= 5) |
18583 | { | |
18584 | gdb_byte segment_selector_size; | |
18585 | ||
18586 | /* Skip address size. */ | |
18587 | read_1_byte (abfd, line_ptr); | |
18588 | line_ptr += 1; | |
18589 | ||
18590 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18591 | line_ptr += 1; | |
18592 | if (segment_selector_size != 0) | |
18593 | { | |
18594 | complaint (&symfile_complaints, | |
18595 | _("unsupported segment selector size %u " | |
18596 | "in .debug_line section"), | |
18597 | segment_selector_size); | |
18598 | return NULL; | |
18599 | } | |
18600 | } | |
c764a876 DE |
18601 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18602 | line_ptr += offset_size; | |
debd256d JB |
18603 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18604 | line_ptr += 1; | |
2dc7f7b3 TT |
18605 | if (lh->version >= 4) |
18606 | { | |
18607 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18608 | line_ptr += 1; | |
18609 | } | |
18610 | else | |
18611 | lh->maximum_ops_per_instruction = 1; | |
18612 | ||
18613 | if (lh->maximum_ops_per_instruction == 0) | |
18614 | { | |
18615 | lh->maximum_ops_per_instruction = 1; | |
18616 | complaint (&symfile_complaints, | |
3e43a32a MS |
18617 | _("invalid maximum_ops_per_instruction " |
18618 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18619 | } |
18620 | ||
debd256d JB |
18621 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18622 | line_ptr += 1; | |
18623 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18624 | line_ptr += 1; | |
18625 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18626 | line_ptr += 1; | |
18627 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18628 | line_ptr += 1; | |
fff8551c | 18629 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18630 | |
18631 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18632 | for (i = 1; i < lh->opcode_base; ++i) | |
18633 | { | |
18634 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18635 | line_ptr += 1; | |
18636 | } | |
18637 | ||
43988095 | 18638 | if (lh->version >= 5) |
debd256d | 18639 | { |
43988095 | 18640 | /* Read directory table. */ |
fff8551c PA |
18641 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18642 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18643 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18644 | unsigned int length) |
18645 | { | |
18646 | lh->add_include_dir (name); | |
18647 | }); | |
debd256d | 18648 | |
43988095 | 18649 | /* Read file name table. */ |
fff8551c PA |
18650 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18651 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18652 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18653 | unsigned int length) |
18654 | { | |
ecfb656c | 18655 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18656 | }); |
43988095 JK |
18657 | } |
18658 | else | |
debd256d | 18659 | { |
43988095 JK |
18660 | /* Read directory table. */ |
18661 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18662 | { | |
18663 | line_ptr += bytes_read; | |
fff8551c | 18664 | lh->add_include_dir (cur_dir); |
43988095 | 18665 | } |
debd256d JB |
18666 | line_ptr += bytes_read; |
18667 | ||
43988095 JK |
18668 | /* Read file name table. */ |
18669 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18670 | { | |
ecfb656c PA |
18671 | unsigned int mod_time, length; |
18672 | dir_index d_index; | |
43988095 JK |
18673 | |
18674 | line_ptr += bytes_read; | |
ecfb656c | 18675 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
18676 | line_ptr += bytes_read; |
18677 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18678 | line_ptr += bytes_read; | |
18679 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18680 | line_ptr += bytes_read; | |
18681 | ||
ecfb656c | 18682 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
18683 | } |
18684 | line_ptr += bytes_read; | |
debd256d | 18685 | } |
6e70227d | 18686 | lh->statement_program_start = line_ptr; |
debd256d | 18687 | |
3019eac3 | 18688 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 18689 | complaint (&symfile_complaints, |
3e43a32a MS |
18690 | _("line number info header doesn't " |
18691 | "fit in `.debug_line' section")); | |
debd256d | 18692 | |
debd256d JB |
18693 | return lh; |
18694 | } | |
c906108c | 18695 | |
c6da4cef DE |
18696 | /* Subroutine of dwarf_decode_lines to simplify it. |
18697 | Return the file name of the psymtab for included file FILE_INDEX | |
18698 | in line header LH of PST. | |
18699 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18700 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
18701 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
18702 | ||
18703 | The function creates dangling cleanup registration. */ | |
c6da4cef | 18704 | |
d521ce57 | 18705 | static const char * |
c6da4cef DE |
18706 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
18707 | const struct partial_symtab *pst, | |
18708 | const char *comp_dir) | |
18709 | { | |
8c43009f | 18710 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
18711 | const char *include_name = fe.name; |
18712 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
18713 | const char *pst_filename; |
18714 | char *copied_name = NULL; | |
c6da4cef DE |
18715 | int file_is_pst; |
18716 | ||
8c43009f | 18717 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
18718 | |
18719 | if (!IS_ABSOLUTE_PATH (include_name) | |
18720 | && (dir_name != NULL || comp_dir != NULL)) | |
18721 | { | |
18722 | /* Avoid creating a duplicate psymtab for PST. | |
18723 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
18724 | Before we do the comparison, however, we need to account | |
18725 | for DIR_NAME and COMP_DIR. | |
18726 | First prepend dir_name (if non-NULL). If we still don't | |
18727 | have an absolute path prepend comp_dir (if non-NULL). | |
18728 | However, the directory we record in the include-file's | |
18729 | psymtab does not contain COMP_DIR (to match the | |
18730 | corresponding symtab(s)). | |
18731 | ||
18732 | Example: | |
18733 | ||
18734 | bash$ cd /tmp | |
18735 | bash$ gcc -g ./hello.c | |
18736 | include_name = "hello.c" | |
18737 | dir_name = "." | |
18738 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
18739 | DW_AT_name = "./hello.c" |
18740 | ||
18741 | */ | |
c6da4cef DE |
18742 | |
18743 | if (dir_name != NULL) | |
18744 | { | |
d521ce57 TT |
18745 | char *tem = concat (dir_name, SLASH_STRING, |
18746 | include_name, (char *)NULL); | |
18747 | ||
18748 | make_cleanup (xfree, tem); | |
18749 | include_name = tem; | |
c6da4cef | 18750 | include_name_to_compare = include_name; |
c6da4cef DE |
18751 | } |
18752 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
18753 | { | |
d521ce57 TT |
18754 | char *tem = concat (comp_dir, SLASH_STRING, |
18755 | include_name, (char *)NULL); | |
18756 | ||
18757 | make_cleanup (xfree, tem); | |
18758 | include_name_to_compare = tem; | |
c6da4cef DE |
18759 | } |
18760 | } | |
18761 | ||
18762 | pst_filename = pst->filename; | |
18763 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
18764 | { | |
72b9f47f TT |
18765 | copied_name = concat (pst->dirname, SLASH_STRING, |
18766 | pst_filename, (char *)NULL); | |
18767 | pst_filename = copied_name; | |
c6da4cef DE |
18768 | } |
18769 | ||
1e3fad37 | 18770 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 18771 | |
72b9f47f TT |
18772 | if (copied_name != NULL) |
18773 | xfree (copied_name); | |
c6da4cef DE |
18774 | |
18775 | if (file_is_pst) | |
18776 | return NULL; | |
18777 | return include_name; | |
18778 | } | |
18779 | ||
d9b3de22 DE |
18780 | /* State machine to track the state of the line number program. */ |
18781 | ||
6f77053d | 18782 | class lnp_state_machine |
d9b3de22 | 18783 | { |
6f77053d PA |
18784 | public: |
18785 | /* Initialize a machine state for the start of a line number | |
18786 | program. */ | |
18787 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
18788 | ||
8c43009f PA |
18789 | file_entry *current_file () |
18790 | { | |
18791 | /* lh->file_names is 0-based, but the file name numbers in the | |
18792 | statement program are 1-based. */ | |
6f77053d PA |
18793 | return m_line_header->file_name_at (m_file); |
18794 | } | |
18795 | ||
18796 | /* Record the line in the state machine. END_SEQUENCE is true if | |
18797 | we're processing the end of a sequence. */ | |
18798 | void record_line (bool end_sequence); | |
18799 | ||
18800 | /* Check address and if invalid nop-out the rest of the lines in this | |
18801 | sequence. */ | |
18802 | void check_line_address (struct dwarf2_cu *cu, | |
18803 | const gdb_byte *line_ptr, | |
18804 | CORE_ADDR lowpc, CORE_ADDR address); | |
18805 | ||
18806 | void handle_set_discriminator (unsigned int discriminator) | |
18807 | { | |
18808 | m_discriminator = discriminator; | |
18809 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
18810 | } | |
18811 | ||
18812 | /* Handle DW_LNE_set_address. */ | |
18813 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
18814 | { | |
18815 | m_op_index = 0; | |
18816 | address += baseaddr; | |
18817 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
18818 | } | |
18819 | ||
18820 | /* Handle DW_LNS_advance_pc. */ | |
18821 | void handle_advance_pc (CORE_ADDR adjust); | |
18822 | ||
18823 | /* Handle a special opcode. */ | |
18824 | void handle_special_opcode (unsigned char op_code); | |
18825 | ||
18826 | /* Handle DW_LNS_advance_line. */ | |
18827 | void handle_advance_line (int line_delta) | |
18828 | { | |
18829 | advance_line (line_delta); | |
18830 | } | |
18831 | ||
18832 | /* Handle DW_LNS_set_file. */ | |
18833 | void handle_set_file (file_name_index file); | |
18834 | ||
18835 | /* Handle DW_LNS_negate_stmt. */ | |
18836 | void handle_negate_stmt () | |
18837 | { | |
18838 | m_is_stmt = !m_is_stmt; | |
18839 | } | |
18840 | ||
18841 | /* Handle DW_LNS_const_add_pc. */ | |
18842 | void handle_const_add_pc (); | |
18843 | ||
18844 | /* Handle DW_LNS_fixed_advance_pc. */ | |
18845 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
18846 | { | |
18847 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18848 | m_op_index = 0; | |
18849 | } | |
18850 | ||
18851 | /* Handle DW_LNS_copy. */ | |
18852 | void handle_copy () | |
18853 | { | |
18854 | record_line (false); | |
18855 | m_discriminator = 0; | |
18856 | } | |
18857 | ||
18858 | /* Handle DW_LNE_end_sequence. */ | |
18859 | void handle_end_sequence () | |
18860 | { | |
18861 | m_record_line_callback = ::record_line; | |
18862 | } | |
18863 | ||
18864 | private: | |
18865 | /* Advance the line by LINE_DELTA. */ | |
18866 | void advance_line (int line_delta) | |
18867 | { | |
18868 | m_line += line_delta; | |
18869 | ||
18870 | if (line_delta != 0) | |
18871 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
18872 | } |
18873 | ||
6f77053d PA |
18874 | gdbarch *m_gdbarch; |
18875 | ||
18876 | /* True if we're recording lines. | |
18877 | Otherwise we're building partial symtabs and are just interested in | |
18878 | finding include files mentioned by the line number program. */ | |
18879 | bool m_record_lines_p; | |
18880 | ||
8c43009f | 18881 | /* The line number header. */ |
6f77053d | 18882 | line_header *m_line_header; |
8c43009f | 18883 | |
6f77053d PA |
18884 | /* These are part of the standard DWARF line number state machine, |
18885 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 18886 | |
6f77053d | 18887 | unsigned char m_op_index = 0; |
8c43009f | 18888 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
18889 | file_name_index m_file = (file_name_index) 1; |
18890 | unsigned int m_line = 1; | |
18891 | ||
18892 | /* These are initialized in the constructor. */ | |
18893 | ||
18894 | CORE_ADDR m_address; | |
18895 | bool m_is_stmt; | |
18896 | unsigned int m_discriminator; | |
d9b3de22 DE |
18897 | |
18898 | /* Additional bits of state we need to track. */ | |
18899 | ||
18900 | /* The last file that we called dwarf2_start_subfile for. | |
18901 | This is only used for TLLs. */ | |
6f77053d | 18902 | unsigned int m_last_file = 0; |
d9b3de22 | 18903 | /* The last file a line number was recorded for. */ |
6f77053d | 18904 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
18905 | |
18906 | /* The function to call to record a line. */ | |
6f77053d | 18907 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
18908 | |
18909 | /* The last line number that was recorded, used to coalesce | |
18910 | consecutive entries for the same line. This can happen, for | |
18911 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
18912 | unsigned int m_last_line = 0; |
18913 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 18914 | }; |
d9b3de22 | 18915 | |
6f77053d PA |
18916 | void |
18917 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
18918 | { | |
18919 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
18920 | / m_line_header->maximum_ops_per_instruction) | |
18921 | * m_line_header->minimum_instruction_length); | |
18922 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18923 | m_op_index = ((m_op_index + adjust) | |
18924 | % m_line_header->maximum_ops_per_instruction); | |
18925 | } | |
d9b3de22 | 18926 | |
6f77053d PA |
18927 | void |
18928 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 18929 | { |
6f77053d PA |
18930 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
18931 | CORE_ADDR addr_adj = (((m_op_index | |
18932 | + (adj_opcode / m_line_header->line_range)) | |
18933 | / m_line_header->maximum_ops_per_instruction) | |
18934 | * m_line_header->minimum_instruction_length); | |
18935 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18936 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
18937 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 18938 | |
6f77053d PA |
18939 | int line_delta = (m_line_header->line_base |
18940 | + (adj_opcode % m_line_header->line_range)); | |
18941 | advance_line (line_delta); | |
18942 | record_line (false); | |
18943 | m_discriminator = 0; | |
18944 | } | |
d9b3de22 | 18945 | |
6f77053d PA |
18946 | void |
18947 | lnp_state_machine::handle_set_file (file_name_index file) | |
18948 | { | |
18949 | m_file = file; | |
18950 | ||
18951 | const file_entry *fe = current_file (); | |
18952 | if (fe == NULL) | |
18953 | dwarf2_debug_line_missing_file_complaint (); | |
18954 | else if (m_record_lines_p) | |
18955 | { | |
18956 | const char *dir = fe->include_dir (m_line_header); | |
18957 | ||
18958 | m_last_subfile = current_subfile; | |
18959 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
18960 | dwarf2_start_subfile (fe->name, dir); | |
18961 | } | |
18962 | } | |
18963 | ||
18964 | void | |
18965 | lnp_state_machine::handle_const_add_pc () | |
18966 | { | |
18967 | CORE_ADDR adjust | |
18968 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
18969 | ||
18970 | CORE_ADDR addr_adj | |
18971 | = (((m_op_index + adjust) | |
18972 | / m_line_header->maximum_ops_per_instruction) | |
18973 | * m_line_header->minimum_instruction_length); | |
18974 | ||
18975 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18976 | m_op_index = ((m_op_index + adjust) | |
18977 | % m_line_header->maximum_ops_per_instruction); | |
18978 | } | |
d9b3de22 | 18979 | |
c91513d8 PP |
18980 | /* Ignore this record_line request. */ |
18981 | ||
18982 | static void | |
18983 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
18984 | { | |
18985 | return; | |
18986 | } | |
18987 | ||
a05a36a5 DE |
18988 | /* Return non-zero if we should add LINE to the line number table. |
18989 | LINE is the line to add, LAST_LINE is the last line that was added, | |
18990 | LAST_SUBFILE is the subfile for LAST_LINE. | |
18991 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
18992 | had a non-zero discriminator. | |
18993 | ||
18994 | We have to be careful in the presence of discriminators. | |
18995 | E.g., for this line: | |
18996 | ||
18997 | for (i = 0; i < 100000; i++); | |
18998 | ||
18999 | clang can emit four line number entries for that one line, | |
19000 | each with a different discriminator. | |
19001 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19002 | ||
19003 | However, we want gdb to coalesce all four entries into one. | |
19004 | Otherwise the user could stepi into the middle of the line and | |
19005 | gdb would get confused about whether the pc really was in the | |
19006 | middle of the line. | |
19007 | ||
19008 | Things are further complicated by the fact that two consecutive | |
19009 | line number entries for the same line is a heuristic used by gcc | |
19010 | to denote the end of the prologue. So we can't just discard duplicate | |
19011 | entries, we have to be selective about it. The heuristic we use is | |
19012 | that we only collapse consecutive entries for the same line if at least | |
19013 | one of those entries has a non-zero discriminator. PR 17276. | |
19014 | ||
19015 | Note: Addresses in the line number state machine can never go backwards | |
19016 | within one sequence, thus this coalescing is ok. */ | |
19017 | ||
19018 | static int | |
19019 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
19020 | int line_has_non_zero_discriminator, | |
19021 | struct subfile *last_subfile) | |
19022 | { | |
19023 | if (current_subfile != last_subfile) | |
19024 | return 1; | |
19025 | if (line != last_line) | |
19026 | return 1; | |
19027 | /* Same line for the same file that we've seen already. | |
19028 | As a last check, for pr 17276, only record the line if the line | |
19029 | has never had a non-zero discriminator. */ | |
19030 | if (!line_has_non_zero_discriminator) | |
19031 | return 1; | |
19032 | return 0; | |
19033 | } | |
19034 | ||
252a6764 DE |
19035 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
19036 | in the line table of subfile SUBFILE. */ | |
19037 | ||
19038 | static void | |
d9b3de22 DE |
19039 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
19040 | unsigned int line, CORE_ADDR address, | |
19041 | record_line_ftype p_record_line) | |
252a6764 DE |
19042 | { |
19043 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19044 | ||
27e0867f DE |
19045 | if (dwarf_line_debug) |
19046 | { | |
19047 | fprintf_unfiltered (gdb_stdlog, | |
19048 | "Recording line %u, file %s, address %s\n", | |
19049 | line, lbasename (subfile->name), | |
19050 | paddress (gdbarch, address)); | |
19051 | } | |
19052 | ||
d5962de5 | 19053 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
19054 | } |
19055 | ||
19056 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19057 | Mark the end of a set of line number records. | |
d9b3de22 | 19058 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19059 | If SUBFILE is NULL the request is ignored. */ |
19060 | ||
19061 | static void | |
19062 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
19063 | CORE_ADDR address, record_line_ftype p_record_line) | |
19064 | { | |
27e0867f DE |
19065 | if (subfile == NULL) |
19066 | return; | |
19067 | ||
19068 | if (dwarf_line_debug) | |
19069 | { | |
19070 | fprintf_unfiltered (gdb_stdlog, | |
19071 | "Finishing current line, file %s, address %s\n", | |
19072 | lbasename (subfile->name), | |
19073 | paddress (gdbarch, address)); | |
19074 | } | |
19075 | ||
d9b3de22 DE |
19076 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
19077 | } | |
19078 | ||
6f77053d PA |
19079 | void |
19080 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19081 | { |
d9b3de22 DE |
19082 | if (dwarf_line_debug) |
19083 | { | |
19084 | fprintf_unfiltered (gdb_stdlog, | |
19085 | "Processing actual line %u: file %u," | |
19086 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
19087 | m_line, to_underlying (m_file), |
19088 | paddress (m_gdbarch, m_address), | |
19089 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
19090 | } |
19091 | ||
6f77053d | 19092 | file_entry *fe = current_file (); |
8c43009f PA |
19093 | |
19094 | if (fe == NULL) | |
d9b3de22 DE |
19095 | dwarf2_debug_line_missing_file_complaint (); |
19096 | /* For now we ignore lines not starting on an instruction boundary. | |
19097 | But not when processing end_sequence for compatibility with the | |
19098 | previous version of the code. */ | |
6f77053d | 19099 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 19100 | { |
8c43009f | 19101 | fe->included_p = 1; |
6f77053d | 19102 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 19103 | { |
6f77053d | 19104 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 19105 | { |
6f77053d PA |
19106 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
19107 | m_address, m_record_line_callback); | |
d9b3de22 DE |
19108 | } |
19109 | ||
19110 | if (!end_sequence) | |
19111 | { | |
6f77053d PA |
19112 | if (dwarf_record_line_p (m_line, m_last_line, |
19113 | m_line_has_non_zero_discriminator, | |
19114 | m_last_subfile)) | |
d9b3de22 | 19115 | { |
6f77053d PA |
19116 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
19117 | m_line, m_address, | |
19118 | m_record_line_callback); | |
d9b3de22 | 19119 | } |
6f77053d PA |
19120 | m_last_subfile = current_subfile; |
19121 | m_last_line = m_line; | |
d9b3de22 DE |
19122 | } |
19123 | } | |
19124 | } | |
19125 | } | |
19126 | ||
6f77053d PA |
19127 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
19128 | bool record_lines_p) | |
d9b3de22 | 19129 | { |
6f77053d PA |
19130 | m_gdbarch = arch; |
19131 | m_record_lines_p = record_lines_p; | |
19132 | m_line_header = lh; | |
d9b3de22 | 19133 | |
6f77053d | 19134 | m_record_line_callback = ::record_line; |
d9b3de22 | 19135 | |
d9b3de22 DE |
19136 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
19137 | was a line entry for it so that the backend has a chance to adjust it | |
19138 | and also record it in case it needs it. This is currently used by MIPS | |
19139 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
19140 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
19141 | m_is_stmt = lh->default_is_stmt; | |
19142 | m_discriminator = 0; | |
252a6764 DE |
19143 | } |
19144 | ||
6f77053d PA |
19145 | void |
19146 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
19147 | const gdb_byte *line_ptr, | |
19148 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
19149 | { |
19150 | /* If address < lowpc then it's not a usable value, it's outside the | |
19151 | pc range of the CU. However, we restrict the test to only address | |
19152 | values of zero to preserve GDB's previous behaviour which is to | |
19153 | handle the specific case of a function being GC'd by the linker. */ | |
19154 | ||
19155 | if (address == 0 && address < lowpc) | |
19156 | { | |
19157 | /* This line table is for a function which has been | |
19158 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
19159 | ||
19160 | struct objfile *objfile = cu->objfile; | |
19161 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
19162 | ||
19163 | complaint (&symfile_complaints, | |
19164 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
19165 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
19166 | m_record_line_callback = noop_record_line; |
19167 | /* Note: record_line_callback is left as noop_record_line until | |
19168 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
19169 | } |
19170 | } | |
19171 | ||
f3f5162e | 19172 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
19173 | Process the line number information in LH. |
19174 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
19175 | program in order to set included_p for every referenced header. */ | |
debd256d | 19176 | |
c906108c | 19177 | static void |
43f3e411 DE |
19178 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
19179 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 19180 | { |
d521ce57 TT |
19181 | const gdb_byte *line_ptr, *extended_end; |
19182 | const gdb_byte *line_end; | |
a8c50c1f | 19183 | unsigned int bytes_read, extended_len; |
699ca60a | 19184 | unsigned char op_code, extended_op; |
e142c38c DJ |
19185 | CORE_ADDR baseaddr; |
19186 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 19187 | bfd *abfd = objfile->obfd; |
fbf65064 | 19188 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
19189 | /* True if we're recording line info (as opposed to building partial |
19190 | symtabs and just interested in finding include files mentioned by | |
19191 | the line number program). */ | |
19192 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
19193 | |
19194 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19195 | |
debd256d JB |
19196 | line_ptr = lh->statement_program_start; |
19197 | line_end = lh->statement_program_end; | |
c906108c SS |
19198 | |
19199 | /* Read the statement sequences until there's nothing left. */ | |
19200 | while (line_ptr < line_end) | |
19201 | { | |
6f77053d PA |
19202 | /* The DWARF line number program state machine. Reset the state |
19203 | machine at the start of each sequence. */ | |
19204 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
19205 | bool end_sequence = false; | |
d9b3de22 | 19206 | |
8c43009f | 19207 | if (record_lines_p) |
c906108c | 19208 | { |
8c43009f PA |
19209 | /* Start a subfile for the current file of the state |
19210 | machine. */ | |
19211 | const file_entry *fe = state_machine.current_file (); | |
19212 | ||
19213 | if (fe != NULL) | |
19214 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
19215 | } |
19216 | ||
a738430d | 19217 | /* Decode the table. */ |
d9b3de22 | 19218 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
19219 | { |
19220 | op_code = read_1_byte (abfd, line_ptr); | |
19221 | line_ptr += 1; | |
9aa1fe7e | 19222 | |
debd256d | 19223 | if (op_code >= lh->opcode_base) |
6e70227d | 19224 | { |
8e07a239 | 19225 | /* Special opcode. */ |
6f77053d | 19226 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
19227 | } |
19228 | else switch (op_code) | |
c906108c SS |
19229 | { |
19230 | case DW_LNS_extended_op: | |
3e43a32a MS |
19231 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
19232 | &bytes_read); | |
473b7be6 | 19233 | line_ptr += bytes_read; |
a8c50c1f | 19234 | extended_end = line_ptr + extended_len; |
c906108c SS |
19235 | extended_op = read_1_byte (abfd, line_ptr); |
19236 | line_ptr += 1; | |
19237 | switch (extended_op) | |
19238 | { | |
19239 | case DW_LNE_end_sequence: | |
6f77053d PA |
19240 | state_machine.handle_end_sequence (); |
19241 | end_sequence = true; | |
c906108c SS |
19242 | break; |
19243 | case DW_LNE_set_address: | |
d9b3de22 DE |
19244 | { |
19245 | CORE_ADDR address | |
19246 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 19247 | line_ptr += bytes_read; |
6f77053d PA |
19248 | |
19249 | state_machine.check_line_address (cu, line_ptr, | |
19250 | lowpc, address); | |
19251 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 19252 | } |
c906108c SS |
19253 | break; |
19254 | case DW_LNE_define_file: | |
debd256d | 19255 | { |
d521ce57 | 19256 | const char *cur_file; |
ecfb656c PA |
19257 | unsigned int mod_time, length; |
19258 | dir_index dindex; | |
6e70227d | 19259 | |
3e43a32a MS |
19260 | cur_file = read_direct_string (abfd, line_ptr, |
19261 | &bytes_read); | |
debd256d | 19262 | line_ptr += bytes_read; |
ecfb656c | 19263 | dindex = (dir_index) |
debd256d JB |
19264 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
19265 | line_ptr += bytes_read; | |
19266 | mod_time = | |
19267 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19268 | line_ptr += bytes_read; | |
19269 | length = | |
19270 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19271 | line_ptr += bytes_read; | |
ecfb656c | 19272 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 19273 | } |
c906108c | 19274 | break; |
d0c6ba3d | 19275 | case DW_LNE_set_discriminator: |
6f77053d PA |
19276 | { |
19277 | /* The discriminator is not interesting to the | |
19278 | debugger; just ignore it. We still need to | |
19279 | check its value though: | |
19280 | if there are consecutive entries for the same | |
19281 | (non-prologue) line we want to coalesce them. | |
19282 | PR 17276. */ | |
19283 | unsigned int discr | |
19284 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19285 | line_ptr += bytes_read; | |
19286 | ||
19287 | state_machine.handle_set_discriminator (discr); | |
19288 | } | |
d0c6ba3d | 19289 | break; |
c906108c | 19290 | default: |
4d3c2250 | 19291 | complaint (&symfile_complaints, |
e2e0b3e5 | 19292 | _("mangled .debug_line section")); |
debd256d | 19293 | return; |
c906108c | 19294 | } |
a8c50c1f DJ |
19295 | /* Make sure that we parsed the extended op correctly. If e.g. |
19296 | we expected a different address size than the producer used, | |
19297 | we may have read the wrong number of bytes. */ | |
19298 | if (line_ptr != extended_end) | |
19299 | { | |
19300 | complaint (&symfile_complaints, | |
19301 | _("mangled .debug_line section")); | |
19302 | return; | |
19303 | } | |
c906108c SS |
19304 | break; |
19305 | case DW_LNS_copy: | |
6f77053d | 19306 | state_machine.handle_copy (); |
c906108c SS |
19307 | break; |
19308 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
19309 | { |
19310 | CORE_ADDR adjust | |
19311 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 19312 | line_ptr += bytes_read; |
6f77053d PA |
19313 | |
19314 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 19315 | } |
c906108c SS |
19316 | break; |
19317 | case DW_LNS_advance_line: | |
a05a36a5 DE |
19318 | { |
19319 | int line_delta | |
19320 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 19321 | line_ptr += bytes_read; |
6f77053d PA |
19322 | |
19323 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 19324 | } |
c906108c SS |
19325 | break; |
19326 | case DW_LNS_set_file: | |
d9b3de22 | 19327 | { |
6f77053d | 19328 | file_name_index file |
ecfb656c PA |
19329 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
19330 | &bytes_read); | |
d9b3de22 | 19331 | line_ptr += bytes_read; |
8c43009f | 19332 | |
6f77053d | 19333 | state_machine.handle_set_file (file); |
d9b3de22 | 19334 | } |
c906108c SS |
19335 | break; |
19336 | case DW_LNS_set_column: | |
0ad93d4f | 19337 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
19338 | line_ptr += bytes_read; |
19339 | break; | |
19340 | case DW_LNS_negate_stmt: | |
6f77053d | 19341 | state_machine.handle_negate_stmt (); |
c906108c SS |
19342 | break; |
19343 | case DW_LNS_set_basic_block: | |
c906108c | 19344 | break; |
c2c6d25f JM |
19345 | /* Add to the address register of the state machine the |
19346 | address increment value corresponding to special opcode | |
a738430d MK |
19347 | 255. I.e., this value is scaled by the minimum |
19348 | instruction length since special opcode 255 would have | |
b021a221 | 19349 | scaled the increment. */ |
c906108c | 19350 | case DW_LNS_const_add_pc: |
6f77053d | 19351 | state_machine.handle_const_add_pc (); |
c906108c SS |
19352 | break; |
19353 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 19354 | { |
6f77053d | 19355 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 19356 | line_ptr += 2; |
6f77053d PA |
19357 | |
19358 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 19359 | } |
c906108c | 19360 | break; |
9aa1fe7e | 19361 | default: |
a738430d MK |
19362 | { |
19363 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 19364 | int i; |
a738430d | 19365 | |
debd256d | 19366 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
19367 | { |
19368 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19369 | line_ptr += bytes_read; | |
19370 | } | |
19371 | } | |
c906108c SS |
19372 | } |
19373 | } | |
d9b3de22 DE |
19374 | |
19375 | if (!end_sequence) | |
19376 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
19377 | ||
19378 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
19379 | in which case we still finish recording the last line). */ | |
6f77053d | 19380 | state_machine.record_line (true); |
c906108c | 19381 | } |
f3f5162e DE |
19382 | } |
19383 | ||
19384 | /* Decode the Line Number Program (LNP) for the given line_header | |
19385 | structure and CU. The actual information extracted and the type | |
19386 | of structures created from the LNP depends on the value of PST. | |
19387 | ||
19388 | 1. If PST is NULL, then this procedure uses the data from the program | |
19389 | to create all necessary symbol tables, and their linetables. | |
19390 | ||
19391 | 2. If PST is not NULL, this procedure reads the program to determine | |
19392 | the list of files included by the unit represented by PST, and | |
19393 | builds all the associated partial symbol tables. | |
19394 | ||
19395 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
19396 | It is used for relative paths in the line table. | |
19397 | NOTE: When processing partial symtabs (pst != NULL), | |
19398 | comp_dir == pst->dirname. | |
19399 | ||
19400 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
19401 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
19402 | symtab we don't use it in the name of the psymtabs we create. | |
19403 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
19404 | A good testcase for this is mb-inline.exp. |
19405 | ||
527f3840 JK |
19406 | LOWPC is the lowest address in CU (or 0 if not known). |
19407 | ||
19408 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
19409 | for its PC<->lines mapping information. Otherwise only the filename | |
19410 | table is read in. */ | |
f3f5162e DE |
19411 | |
19412 | static void | |
19413 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 19414 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 19415 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
19416 | { |
19417 | struct objfile *objfile = cu->objfile; | |
19418 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 19419 | |
527f3840 JK |
19420 | if (decode_mapping) |
19421 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
19422 | |
19423 | if (decode_for_pst_p) | |
19424 | { | |
19425 | int file_index; | |
19426 | ||
19427 | /* Now that we're done scanning the Line Header Program, we can | |
19428 | create the psymtab of each included file. */ | |
fff8551c | 19429 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
19430 | if (lh->file_names[file_index].included_p == 1) |
19431 | { | |
d521ce57 | 19432 | const char *include_name = |
c6da4cef DE |
19433 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
19434 | if (include_name != NULL) | |
aaa75496 JB |
19435 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
19436 | } | |
19437 | } | |
cb1df416 DJ |
19438 | else |
19439 | { | |
19440 | /* Make sure a symtab is created for every file, even files | |
19441 | which contain only variables (i.e. no code with associated | |
19442 | line numbers). */ | |
43f3e411 | 19443 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 19444 | int i; |
cb1df416 | 19445 | |
fff8551c | 19446 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 19447 | { |
8c43009f | 19448 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 19449 | |
8c43009f | 19450 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 19451 | |
cb1df416 | 19452 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
19453 | { |
19454 | current_subfile->symtab | |
19455 | = allocate_symtab (cust, current_subfile->name); | |
19456 | } | |
8c43009f | 19457 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
19458 | } |
19459 | } | |
c906108c SS |
19460 | } |
19461 | ||
19462 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
19463 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 19464 | or NULL if not known. |
c906108c SS |
19465 | This routine tries to keep line numbers from identical absolute and |
19466 | relative file names in a common subfile. | |
19467 | ||
19468 | Using the `list' example from the GDB testsuite, which resides in | |
19469 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
19470 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
19471 | ||
c5aa993b | 19472 | DW_AT_name: /srcdir/list0.c |
4d663531 | 19473 | DW_AT_comp_dir: /compdir |
357e46e7 | 19474 | files.files[0].name: list0.h |
c5aa993b | 19475 | files.files[0].dir: /srcdir |
357e46e7 | 19476 | files.files[1].name: list0.c |
c5aa993b | 19477 | files.files[1].dir: /srcdir |
c906108c SS |
19478 | |
19479 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
19480 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
19481 | start_subfile will ensure that this happens provided that we pass the | |
19482 | concatenation of files.files[1].dir and files.files[1].name as the | |
19483 | subfile's name. */ | |
c906108c SS |
19484 | |
19485 | static void | |
4d663531 | 19486 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 19487 | { |
d521ce57 | 19488 | char *copy = NULL; |
4f1520fb | 19489 | |
4d663531 | 19490 | /* In order not to lose the line information directory, |
4f1520fb FR |
19491 | we concatenate it to the filename when it makes sense. |
19492 | Note that the Dwarf3 standard says (speaking of filenames in line | |
19493 | information): ``The directory index is ignored for file names | |
19494 | that represent full path names''. Thus ignoring dirname in the | |
19495 | `else' branch below isn't an issue. */ | |
c906108c | 19496 | |
d5166ae1 | 19497 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
19498 | { |
19499 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
19500 | filename = copy; | |
19501 | } | |
c906108c | 19502 | |
4d663531 | 19503 | start_subfile (filename); |
4f1520fb | 19504 | |
d521ce57 TT |
19505 | if (copy != NULL) |
19506 | xfree (copy); | |
c906108c SS |
19507 | } |
19508 | ||
f4dc4d17 DE |
19509 | /* Start a symtab for DWARF. |
19510 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
19511 | ||
43f3e411 | 19512 | static struct compunit_symtab * |
f4dc4d17 | 19513 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 19514 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 19515 | { |
43f3e411 | 19516 | struct compunit_symtab *cust |
5ffa0793 | 19517 | = start_symtab (cu->objfile, name, comp_dir, low_pc, cu->language); |
43f3e411 | 19518 | |
f4dc4d17 DE |
19519 | record_debugformat ("DWARF 2"); |
19520 | record_producer (cu->producer); | |
19521 | ||
19522 | /* We assume that we're processing GCC output. */ | |
19523 | processing_gcc_compilation = 2; | |
19524 | ||
4d4ec4e5 | 19525 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
19526 | |
19527 | return cust; | |
f4dc4d17 DE |
19528 | } |
19529 | ||
4c2df51b DJ |
19530 | static void |
19531 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 19532 | struct dwarf2_cu *cu) |
4c2df51b | 19533 | { |
e7c27a73 DJ |
19534 | struct objfile *objfile = cu->objfile; |
19535 | struct comp_unit_head *cu_header = &cu->header; | |
19536 | ||
4c2df51b DJ |
19537 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
19538 | code here to turn a symbol with DW_AT_external and a | |
19539 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
19540 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
19541 | with some versions of binutils) where shared libraries could have | |
19542 | relocations against symbols in their debug information - the | |
19543 | minimal symbol would have the right address, but the debug info | |
19544 | would not. It's no longer necessary, because we will explicitly | |
19545 | apply relocations when we read in the debug information now. */ | |
19546 | ||
19547 | /* A DW_AT_location attribute with no contents indicates that a | |
19548 | variable has been optimized away. */ | |
19549 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
19550 | { | |
f1e6e072 | 19551 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
19552 | return; |
19553 | } | |
19554 | ||
19555 | /* Handle one degenerate form of location expression specially, to | |
19556 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
19557 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
19558 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
19559 | |
19560 | if (attr_form_is_block (attr) | |
3019eac3 DE |
19561 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
19562 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
19563 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
19564 | && (DW_BLOCK (attr)->size | |
19565 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 19566 | { |
891d2f0b | 19567 | unsigned int dummy; |
4c2df51b | 19568 | |
3019eac3 DE |
19569 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
19570 | SYMBOL_VALUE_ADDRESS (sym) = | |
19571 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
19572 | else | |
19573 | SYMBOL_VALUE_ADDRESS (sym) = | |
19574 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 19575 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
19576 | fixup_symbol_section (sym, objfile); |
19577 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
19578 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
19579 | return; |
19580 | } | |
19581 | ||
19582 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
19583 | expression evaluator, and use LOC_COMPUTED only when necessary | |
19584 | (i.e. when the value of a register or memory location is | |
19585 | referenced, or a thread-local block, etc.). Then again, it might | |
19586 | not be worthwhile. I'm assuming that it isn't unless performance | |
19587 | or memory numbers show me otherwise. */ | |
19588 | ||
f1e6e072 | 19589 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19590 | |
f1e6e072 | 19591 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19592 | cu->has_loclist = 1; |
4c2df51b DJ |
19593 | } |
19594 | ||
c906108c SS |
19595 | /* Given a pointer to a DWARF information entry, figure out if we need |
19596 | to make a symbol table entry for it, and if so, create a new entry | |
19597 | and return a pointer to it. | |
19598 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19599 | used the passed type. |
19600 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19601 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19602 | |
19603 | static struct symbol * | |
34eaf542 TT |
19604 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19605 | struct symbol *space) | |
c906108c | 19606 | { |
e7c27a73 | 19607 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19608 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19609 | struct symbol *sym = NULL; |
15d034d0 | 19610 | const char *name; |
c906108c SS |
19611 | struct attribute *attr = NULL; |
19612 | struct attribute *attr2 = NULL; | |
e142c38c | 19613 | CORE_ADDR baseaddr; |
e37fd15a SW |
19614 | struct pending **list_to_add = NULL; |
19615 | ||
edb3359d | 19616 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19617 | |
19618 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19619 | |
94af9270 | 19620 | name = dwarf2_name (die, cu); |
c906108c SS |
19621 | if (name) |
19622 | { | |
94af9270 | 19623 | const char *linkagename; |
34eaf542 | 19624 | int suppress_add = 0; |
94af9270 | 19625 | |
34eaf542 TT |
19626 | if (space) |
19627 | sym = space; | |
19628 | else | |
e623cf5d | 19629 | sym = allocate_symbol (objfile); |
c906108c | 19630 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19631 | |
19632 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19633 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19634 | linkagename = dwarf2_physname (name, die, cu); |
19635 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19636 | |
f55ee35c JK |
19637 | /* Fortran does not have mangling standard and the mangling does differ |
19638 | between gfortran, iFort etc. */ | |
19639 | if (cu->language == language_fortran | |
b250c185 | 19640 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19641 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19642 | dwarf2_full_name (name, die, cu), |
29df156d | 19643 | NULL); |
f55ee35c | 19644 | |
c906108c | 19645 | /* Default assumptions. |
c5aa993b | 19646 | Use the passed type or decode it from the die. */ |
176620f1 | 19647 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19648 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19649 | if (type != NULL) |
19650 | SYMBOL_TYPE (sym) = type; | |
19651 | else | |
e7c27a73 | 19652 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19653 | attr = dwarf2_attr (die, |
19654 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19655 | cu); | |
c906108c SS |
19656 | if (attr) |
19657 | { | |
19658 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19659 | } | |
cb1df416 | 19660 | |
edb3359d DJ |
19661 | attr = dwarf2_attr (die, |
19662 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19663 | cu); | |
cb1df416 DJ |
19664 | if (attr) |
19665 | { | |
ecfb656c | 19666 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 19667 | struct file_entry *fe; |
9a619af0 | 19668 | |
ecfb656c PA |
19669 | if (cu->line_header != NULL) |
19670 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
19671 | else |
19672 | fe = NULL; | |
19673 | ||
19674 | if (fe == NULL) | |
cb1df416 DJ |
19675 | complaint (&symfile_complaints, |
19676 | _("file index out of range")); | |
8c43009f PA |
19677 | else |
19678 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
19679 | } |
19680 | ||
c906108c SS |
19681 | switch (die->tag) |
19682 | { | |
19683 | case DW_TAG_label: | |
e142c38c | 19684 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 19685 | if (attr) |
3e29f34a MR |
19686 | { |
19687 | CORE_ADDR addr; | |
19688 | ||
19689 | addr = attr_value_as_address (attr); | |
19690 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
19691 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
19692 | } | |
0f5238ed TT |
19693 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
19694 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 19695 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 19696 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
19697 | break; |
19698 | case DW_TAG_subprogram: | |
19699 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19700 | finish_block. */ | |
f1e6e072 | 19701 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 19702 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
19703 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
19704 | || cu->language == language_ada) | |
c906108c | 19705 | { |
2cfa0c8d JB |
19706 | /* Subprograms marked external are stored as a global symbol. |
19707 | Ada subprograms, whether marked external or not, are always | |
19708 | stored as a global symbol, because we want to be able to | |
19709 | access them globally. For instance, we want to be able | |
19710 | to break on a nested subprogram without having to | |
19711 | specify the context. */ | |
e37fd15a | 19712 | list_to_add = &global_symbols; |
c906108c SS |
19713 | } |
19714 | else | |
19715 | { | |
e37fd15a | 19716 | list_to_add = cu->list_in_scope; |
c906108c SS |
19717 | } |
19718 | break; | |
edb3359d DJ |
19719 | case DW_TAG_inlined_subroutine: |
19720 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19721 | finish_block. */ | |
f1e6e072 | 19722 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 19723 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 19724 | list_to_add = cu->list_in_scope; |
edb3359d | 19725 | break; |
34eaf542 TT |
19726 | case DW_TAG_template_value_param: |
19727 | suppress_add = 1; | |
19728 | /* Fall through. */ | |
72929c62 | 19729 | case DW_TAG_constant: |
c906108c | 19730 | case DW_TAG_variable: |
254e6b9e | 19731 | case DW_TAG_member: |
0963b4bd MS |
19732 | /* Compilation with minimal debug info may result in |
19733 | variables with missing type entries. Change the | |
19734 | misleading `void' type to something sensible. */ | |
c906108c | 19735 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 19736 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 19737 | |
e142c38c | 19738 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
19739 | /* In the case of DW_TAG_member, we should only be called for |
19740 | static const members. */ | |
19741 | if (die->tag == DW_TAG_member) | |
19742 | { | |
3863f96c DE |
19743 | /* dwarf2_add_field uses die_is_declaration, |
19744 | so we do the same. */ | |
254e6b9e DE |
19745 | gdb_assert (die_is_declaration (die, cu)); |
19746 | gdb_assert (attr); | |
19747 | } | |
c906108c SS |
19748 | if (attr) |
19749 | { | |
e7c27a73 | 19750 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 19751 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 19752 | if (!suppress_add) |
34eaf542 TT |
19753 | { |
19754 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 19755 | list_to_add = &global_symbols; |
34eaf542 | 19756 | else |
e37fd15a | 19757 | list_to_add = cu->list_in_scope; |
34eaf542 | 19758 | } |
c906108c SS |
19759 | break; |
19760 | } | |
e142c38c | 19761 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19762 | if (attr) |
19763 | { | |
e7c27a73 | 19764 | var_decode_location (attr, sym, cu); |
e142c38c | 19765 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
19766 | |
19767 | /* Fortran explicitly imports any global symbols to the local | |
19768 | scope by DW_TAG_common_block. */ | |
19769 | if (cu->language == language_fortran && die->parent | |
19770 | && die->parent->tag == DW_TAG_common_block) | |
19771 | attr2 = NULL; | |
19772 | ||
caac4577 JG |
19773 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
19774 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
19775 | && !dwarf2_per_objfile->has_section_at_zero) | |
19776 | { | |
19777 | /* When a static variable is eliminated by the linker, | |
19778 | the corresponding debug information is not stripped | |
19779 | out, but the variable address is set to null; | |
19780 | do not add such variables into symbol table. */ | |
19781 | } | |
19782 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 19783 | { |
f55ee35c JK |
19784 | /* Workaround gfortran PR debug/40040 - it uses |
19785 | DW_AT_location for variables in -fPIC libraries which may | |
19786 | get overriden by other libraries/executable and get | |
19787 | a different address. Resolve it by the minimal symbol | |
19788 | which may come from inferior's executable using copy | |
19789 | relocation. Make this workaround only for gfortran as for | |
19790 | other compilers GDB cannot guess the minimal symbol | |
19791 | Fortran mangling kind. */ | |
19792 | if (cu->language == language_fortran && die->parent | |
19793 | && die->parent->tag == DW_TAG_module | |
19794 | && cu->producer | |
28586665 | 19795 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 19796 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 19797 | |
1c809c68 TT |
19798 | /* A variable with DW_AT_external is never static, |
19799 | but it may be block-scoped. */ | |
19800 | list_to_add = (cu->list_in_scope == &file_symbols | |
19801 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 19802 | } |
c906108c | 19803 | else |
e37fd15a | 19804 | list_to_add = cu->list_in_scope; |
c906108c SS |
19805 | } |
19806 | else | |
19807 | { | |
19808 | /* We do not know the address of this symbol. | |
c5aa993b JM |
19809 | If it is an external symbol and we have type information |
19810 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
19811 | The address of the variable will then be determined from | |
19812 | the minimal symbol table whenever the variable is | |
19813 | referenced. */ | |
e142c38c | 19814 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
19815 | |
19816 | /* Fortran explicitly imports any global symbols to the local | |
19817 | scope by DW_TAG_common_block. */ | |
19818 | if (cu->language == language_fortran && die->parent | |
19819 | && die->parent->tag == DW_TAG_common_block) | |
19820 | { | |
19821 | /* SYMBOL_CLASS doesn't matter here because | |
19822 | read_common_block is going to reset it. */ | |
19823 | if (!suppress_add) | |
19824 | list_to_add = cu->list_in_scope; | |
19825 | } | |
19826 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
19827 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 19828 | { |
0fe7935b DJ |
19829 | /* A variable with DW_AT_external is never static, but it |
19830 | may be block-scoped. */ | |
19831 | list_to_add = (cu->list_in_scope == &file_symbols | |
19832 | ? &global_symbols : cu->list_in_scope); | |
19833 | ||
f1e6e072 | 19834 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 19835 | } |
442ddf59 JK |
19836 | else if (!die_is_declaration (die, cu)) |
19837 | { | |
19838 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
19839 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
19840 | if (!suppress_add) |
19841 | list_to_add = cu->list_in_scope; | |
442ddf59 | 19842 | } |
c906108c SS |
19843 | } |
19844 | break; | |
19845 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
19846 | /* If we are inside a function, mark this as an argument. If |
19847 | not, we might be looking at an argument to an inlined function | |
19848 | when we do not have enough information to show inlined frames; | |
19849 | pretend it's a local variable in that case so that the user can | |
19850 | still see it. */ | |
19851 | if (context_stack_depth > 0 | |
19852 | && context_stack[context_stack_depth - 1].name != NULL) | |
19853 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 19854 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19855 | if (attr) |
19856 | { | |
e7c27a73 | 19857 | var_decode_location (attr, sym, cu); |
c906108c | 19858 | } |
e142c38c | 19859 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19860 | if (attr) |
19861 | { | |
e7c27a73 | 19862 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19863 | } |
f346a30d | 19864 | |
e37fd15a | 19865 | list_to_add = cu->list_in_scope; |
c906108c SS |
19866 | break; |
19867 | case DW_TAG_unspecified_parameters: | |
19868 | /* From varargs functions; gdb doesn't seem to have any | |
19869 | interest in this information, so just ignore it for now. | |
19870 | (FIXME?) */ | |
19871 | break; | |
34eaf542 TT |
19872 | case DW_TAG_template_type_param: |
19873 | suppress_add = 1; | |
19874 | /* Fall through. */ | |
c906108c | 19875 | case DW_TAG_class_type: |
680b30c7 | 19876 | case DW_TAG_interface_type: |
c906108c SS |
19877 | case DW_TAG_structure_type: |
19878 | case DW_TAG_union_type: | |
72019c9c | 19879 | case DW_TAG_set_type: |
c906108c | 19880 | case DW_TAG_enumeration_type: |
f1e6e072 | 19881 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19882 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 19883 | |
63d06c5c | 19884 | { |
9c37b5ae | 19885 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
19886 | really ever be static objects: otherwise, if you try |
19887 | to, say, break of a class's method and you're in a file | |
19888 | which doesn't mention that class, it won't work unless | |
19889 | the check for all static symbols in lookup_symbol_aux | |
19890 | saves you. See the OtherFileClass tests in | |
19891 | gdb.c++/namespace.exp. */ | |
19892 | ||
e37fd15a | 19893 | if (!suppress_add) |
34eaf542 | 19894 | { |
34eaf542 | 19895 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19896 | && cu->language == language_cplus |
34eaf542 | 19897 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19898 | |
64382290 | 19899 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 19900 | ... }" also defines a typedef for "foo". */ |
64382290 | 19901 | if (cu->language == language_cplus |
45280282 | 19902 | || cu->language == language_ada |
c44af4eb TT |
19903 | || cu->language == language_d |
19904 | || cu->language == language_rust) | |
64382290 TT |
19905 | { |
19906 | /* The symbol's name is already allocated along | |
19907 | with this objfile, so we don't need to | |
19908 | duplicate it for the type. */ | |
19909 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
19910 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
19911 | } | |
63d06c5c DC |
19912 | } |
19913 | } | |
c906108c SS |
19914 | break; |
19915 | case DW_TAG_typedef: | |
f1e6e072 | 19916 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 19917 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19918 | list_to_add = cu->list_in_scope; |
63d06c5c | 19919 | break; |
c906108c | 19920 | case DW_TAG_base_type: |
a02abb62 | 19921 | case DW_TAG_subrange_type: |
f1e6e072 | 19922 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19923 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19924 | list_to_add = cu->list_in_scope; |
c906108c SS |
19925 | break; |
19926 | case DW_TAG_enumerator: | |
e142c38c | 19927 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19928 | if (attr) |
19929 | { | |
e7c27a73 | 19930 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19931 | } |
63d06c5c DC |
19932 | { |
19933 | /* NOTE: carlton/2003-11-10: See comment above in the | |
19934 | DW_TAG_class_type, etc. block. */ | |
19935 | ||
e142c38c | 19936 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19937 | && cu->language == language_cplus |
e142c38c | 19938 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19939 | } |
c906108c | 19940 | break; |
74921315 | 19941 | case DW_TAG_imported_declaration: |
5c4e30ca | 19942 | case DW_TAG_namespace: |
f1e6e072 | 19943 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 19944 | list_to_add = &global_symbols; |
5c4e30ca | 19945 | break; |
530e8392 KB |
19946 | case DW_TAG_module: |
19947 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
19948 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
19949 | list_to_add = &global_symbols; | |
19950 | break; | |
4357ac6c | 19951 | case DW_TAG_common_block: |
f1e6e072 | 19952 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
19953 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
19954 | add_symbol_to_list (sym, cu->list_in_scope); | |
19955 | break; | |
c906108c SS |
19956 | default: |
19957 | /* Not a tag we recognize. Hopefully we aren't processing | |
19958 | trash data, but since we must specifically ignore things | |
19959 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 19960 | this point. */ |
e2e0b3e5 | 19961 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 19962 | dwarf_tag_name (die->tag)); |
c906108c SS |
19963 | break; |
19964 | } | |
df8a16a1 | 19965 | |
e37fd15a SW |
19966 | if (suppress_add) |
19967 | { | |
19968 | sym->hash_next = objfile->template_symbols; | |
19969 | objfile->template_symbols = sym; | |
19970 | list_to_add = NULL; | |
19971 | } | |
19972 | ||
19973 | if (list_to_add != NULL) | |
19974 | add_symbol_to_list (sym, list_to_add); | |
19975 | ||
df8a16a1 DJ |
19976 | /* For the benefit of old versions of GCC, check for anonymous |
19977 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 19978 | if (!cu->processing_has_namespace_info |
94af9270 | 19979 | && cu->language == language_cplus) |
a10964d1 | 19980 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
19981 | } |
19982 | return (sym); | |
19983 | } | |
19984 | ||
34eaf542 TT |
19985 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
19986 | ||
19987 | static struct symbol * | |
19988 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
19989 | { | |
19990 | return new_symbol_full (die, type, cu, NULL); | |
19991 | } | |
19992 | ||
98bfdba5 PA |
19993 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
19994 | zero-extend it as appropriate for the symbol's type. The DWARF | |
19995 | standard (v4) is not entirely clear about the meaning of using | |
19996 | DW_FORM_dataN for a constant with a signed type, where the type is | |
19997 | wider than the data. The conclusion of a discussion on the DWARF | |
19998 | list was that this is unspecified. We choose to always zero-extend | |
19999 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20000 | |
98bfdba5 | 20001 | static gdb_byte * |
ff39bb5e | 20002 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20003 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20004 | { |
e7c27a73 | 20005 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
20006 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20007 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20008 | LONGEST l = DW_UNSND (attr); |
20009 | ||
20010 | if (bits < sizeof (*value) * 8) | |
20011 | { | |
20012 | l &= ((LONGEST) 1 << bits) - 1; | |
20013 | *value = l; | |
20014 | } | |
20015 | else if (bits == sizeof (*value) * 8) | |
20016 | *value = l; | |
20017 | else | |
20018 | { | |
224c3ddb | 20019 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20020 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20021 | return bytes; | |
20022 | } | |
20023 | ||
20024 | return NULL; | |
20025 | } | |
20026 | ||
20027 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20028 | the value does not fit in *VALUE, set *BYTES - either already | |
20029 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20030 | or, set *BATON, if we translated the constant to a location | |
20031 | expression. */ | |
20032 | ||
20033 | static void | |
ff39bb5e | 20034 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20035 | const char *name, struct obstack *obstack, |
20036 | struct dwarf2_cu *cu, | |
d521ce57 | 20037 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20038 | struct dwarf2_locexpr_baton **baton) |
20039 | { | |
20040 | struct objfile *objfile = cu->objfile; | |
20041 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 20042 | struct dwarf_block *blk; |
98bfdba5 PA |
20043 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20044 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20045 | ||
20046 | *value = 0; | |
20047 | *bytes = NULL; | |
20048 | *baton = NULL; | |
c906108c SS |
20049 | |
20050 | switch (attr->form) | |
20051 | { | |
20052 | case DW_FORM_addr: | |
3019eac3 | 20053 | case DW_FORM_GNU_addr_index: |
ac56253d | 20054 | { |
ac56253d TT |
20055 | gdb_byte *data; |
20056 | ||
98bfdba5 PA |
20057 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20058 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20059 | cu_header->addr_size, |
98bfdba5 | 20060 | TYPE_LENGTH (type)); |
ac56253d TT |
20061 | /* Symbols of this form are reasonably rare, so we just |
20062 | piggyback on the existing location code rather than writing | |
20063 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20064 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20065 | (*baton)->per_cu = cu->per_cu; |
20066 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20067 | |
98bfdba5 | 20068 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20069 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20070 | (*baton)->data = data; |
ac56253d TT |
20071 | |
20072 | data[0] = DW_OP_addr; | |
20073 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20074 | byte_order, DW_ADDR (attr)); | |
20075 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20076 | } |
c906108c | 20077 | break; |
4ac36638 | 20078 | case DW_FORM_string: |
93b5768b | 20079 | case DW_FORM_strp: |
3019eac3 | 20080 | case DW_FORM_GNU_str_index: |
36586728 | 20081 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
20082 | /* DW_STRING is already allocated on the objfile obstack, point |
20083 | directly to it. */ | |
d521ce57 | 20084 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 20085 | break; |
c906108c SS |
20086 | case DW_FORM_block1: |
20087 | case DW_FORM_block2: | |
20088 | case DW_FORM_block4: | |
20089 | case DW_FORM_block: | |
2dc7f7b3 | 20090 | case DW_FORM_exprloc: |
0224619f | 20091 | case DW_FORM_data16: |
c906108c | 20092 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
20093 | if (TYPE_LENGTH (type) != blk->size) |
20094 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
20095 | TYPE_LENGTH (type)); | |
20096 | *bytes = blk->data; | |
c906108c | 20097 | break; |
2df3850c JM |
20098 | |
20099 | /* The DW_AT_const_value attributes are supposed to carry the | |
20100 | symbol's value "represented as it would be on the target | |
20101 | architecture." By the time we get here, it's already been | |
20102 | converted to host endianness, so we just need to sign- or | |
20103 | zero-extend it as appropriate. */ | |
20104 | case DW_FORM_data1: | |
3aef2284 | 20105 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 20106 | break; |
c906108c | 20107 | case DW_FORM_data2: |
3aef2284 | 20108 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 20109 | break; |
c906108c | 20110 | case DW_FORM_data4: |
3aef2284 | 20111 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 20112 | break; |
c906108c | 20113 | case DW_FORM_data8: |
3aef2284 | 20114 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
20115 | break; |
20116 | ||
c906108c | 20117 | case DW_FORM_sdata: |
663c44ac | 20118 | case DW_FORM_implicit_const: |
98bfdba5 | 20119 | *value = DW_SND (attr); |
2df3850c JM |
20120 | break; |
20121 | ||
c906108c | 20122 | case DW_FORM_udata: |
98bfdba5 | 20123 | *value = DW_UNSND (attr); |
c906108c | 20124 | break; |
2df3850c | 20125 | |
c906108c | 20126 | default: |
4d3c2250 | 20127 | complaint (&symfile_complaints, |
e2e0b3e5 | 20128 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 20129 | dwarf_form_name (attr->form)); |
98bfdba5 | 20130 | *value = 0; |
c906108c SS |
20131 | break; |
20132 | } | |
20133 | } | |
20134 | ||
2df3850c | 20135 | |
98bfdba5 PA |
20136 | /* Copy constant value from an attribute to a symbol. */ |
20137 | ||
2df3850c | 20138 | static void |
ff39bb5e | 20139 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 20140 | struct dwarf2_cu *cu) |
2df3850c | 20141 | { |
98bfdba5 | 20142 | struct objfile *objfile = cu->objfile; |
12df843f | 20143 | LONGEST value; |
d521ce57 | 20144 | const gdb_byte *bytes; |
98bfdba5 | 20145 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 20146 | |
98bfdba5 PA |
20147 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
20148 | SYMBOL_PRINT_NAME (sym), | |
20149 | &objfile->objfile_obstack, cu, | |
20150 | &value, &bytes, &baton); | |
2df3850c | 20151 | |
98bfdba5 PA |
20152 | if (baton != NULL) |
20153 | { | |
98bfdba5 | 20154 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 20155 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
20156 | } |
20157 | else if (bytes != NULL) | |
20158 | { | |
20159 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 20160 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
20161 | } |
20162 | else | |
20163 | { | |
20164 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 20165 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 20166 | } |
2df3850c JM |
20167 | } |
20168 | ||
c906108c SS |
20169 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
20170 | ||
20171 | static struct type * | |
e7c27a73 | 20172 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20173 | { |
c906108c | 20174 | struct attribute *type_attr; |
c906108c | 20175 | |
e142c38c | 20176 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
20177 | if (!type_attr) |
20178 | { | |
20179 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 20180 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 20181 | } |
348e048f | 20182 | |
673bfd45 | 20183 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20184 | } |
20185 | ||
b4ba55a1 JB |
20186 | /* True iff CU's producer generates GNAT Ada auxiliary information |
20187 | that allows to find parallel types through that information instead | |
20188 | of having to do expensive parallel lookups by type name. */ | |
20189 | ||
20190 | static int | |
20191 | need_gnat_info (struct dwarf2_cu *cu) | |
20192 | { | |
20193 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
20194 | of GNAT produces this auxiliary information, without any indication | |
20195 | that it is produced. Part of enhancing the FSF version of GNAT | |
20196 | to produce that information will be to put in place an indicator | |
20197 | that we can use in order to determine whether the descriptive type | |
20198 | info is available or not. One suggestion that has been made is | |
20199 | to use a new attribute, attached to the CU die. For now, assume | |
20200 | that the descriptive type info is not available. */ | |
20201 | return 0; | |
20202 | } | |
20203 | ||
b4ba55a1 JB |
20204 | /* Return the auxiliary type of the die in question using its |
20205 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
20206 | attribute is not present. */ | |
20207 | ||
20208 | static struct type * | |
20209 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
20210 | { | |
b4ba55a1 | 20211 | struct attribute *type_attr; |
b4ba55a1 JB |
20212 | |
20213 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
20214 | if (!type_attr) | |
20215 | return NULL; | |
20216 | ||
673bfd45 | 20217 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
20218 | } |
20219 | ||
20220 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
20221 | descriptive type accordingly. */ | |
20222 | ||
20223 | static void | |
20224 | set_descriptive_type (struct type *type, struct die_info *die, | |
20225 | struct dwarf2_cu *cu) | |
20226 | { | |
20227 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
20228 | ||
20229 | if (descriptive_type) | |
20230 | { | |
20231 | ALLOCATE_GNAT_AUX_TYPE (type); | |
20232 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
20233 | } | |
20234 | } | |
20235 | ||
c906108c SS |
20236 | /* Return the containing type of the die in question using its |
20237 | DW_AT_containing_type attribute. */ | |
20238 | ||
20239 | static struct type * | |
e7c27a73 | 20240 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20241 | { |
c906108c | 20242 | struct attribute *type_attr; |
c906108c | 20243 | |
e142c38c | 20244 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
20245 | if (!type_attr) |
20246 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 20247 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 20248 | |
673bfd45 | 20249 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
20250 | } |
20251 | ||
ac9ec31b DE |
20252 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
20253 | ||
20254 | static struct type * | |
20255 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
20256 | { | |
20257 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
20258 | char *message, *saved; | |
20259 | ||
20260 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 20261 | objfile_name (objfile), |
9c541725 PA |
20262 | to_underlying (cu->header.sect_off), |
20263 | to_underlying (die->sect_off)); | |
224c3ddb SM |
20264 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
20265 | message, strlen (message)); | |
ac9ec31b DE |
20266 | xfree (message); |
20267 | ||
19f392bc | 20268 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
20269 | } |
20270 | ||
673bfd45 | 20271 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
20272 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
20273 | DW_AT_containing_type. | |
673bfd45 DE |
20274 | If there is no type substitute an error marker. */ |
20275 | ||
c906108c | 20276 | static struct type * |
ff39bb5e | 20277 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 20278 | struct dwarf2_cu *cu) |
c906108c | 20279 | { |
bb5ed363 | 20280 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
20281 | struct type *this_type; |
20282 | ||
ac9ec31b DE |
20283 | gdb_assert (attr->name == DW_AT_type |
20284 | || attr->name == DW_AT_GNAT_descriptive_type | |
20285 | || attr->name == DW_AT_containing_type); | |
20286 | ||
673bfd45 DE |
20287 | /* First see if we have it cached. */ |
20288 | ||
36586728 TT |
20289 | if (attr->form == DW_FORM_GNU_ref_alt) |
20290 | { | |
20291 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 20292 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 20293 | |
9c541725 PA |
20294 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
20295 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 20296 | } |
7771576e | 20297 | else if (attr_form_is_ref (attr)) |
673bfd45 | 20298 | { |
9c541725 | 20299 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 20300 | |
9c541725 | 20301 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 20302 | } |
55f1336d | 20303 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 20304 | { |
ac9ec31b | 20305 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 20306 | |
ac9ec31b | 20307 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
20308 | } |
20309 | else | |
20310 | { | |
ac9ec31b DE |
20311 | complaint (&symfile_complaints, |
20312 | _("Dwarf Error: Bad type attribute %s in DIE" | |
20313 | " at 0x%x [in module %s]"), | |
9c541725 | 20314 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 20315 | objfile_name (objfile)); |
ac9ec31b | 20316 | return build_error_marker_type (cu, die); |
673bfd45 DE |
20317 | } |
20318 | ||
20319 | /* If not cached we need to read it in. */ | |
20320 | ||
20321 | if (this_type == NULL) | |
20322 | { | |
ac9ec31b | 20323 | struct die_info *type_die = NULL; |
673bfd45 DE |
20324 | struct dwarf2_cu *type_cu = cu; |
20325 | ||
7771576e | 20326 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20327 | type_die = follow_die_ref (die, attr, &type_cu); |
20328 | if (type_die == NULL) | |
20329 | return build_error_marker_type (cu, die); | |
20330 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
20331 | from an inter-CU reference and the type's CU got expanded before |
20332 | ours. */ | |
ac9ec31b | 20333 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
20334 | } |
20335 | ||
20336 | /* If we still don't have a type use an error marker. */ | |
20337 | ||
20338 | if (this_type == NULL) | |
ac9ec31b | 20339 | return build_error_marker_type (cu, die); |
673bfd45 | 20340 | |
f792889a | 20341 | return this_type; |
c906108c SS |
20342 | } |
20343 | ||
673bfd45 DE |
20344 | /* Return the type in DIE, CU. |
20345 | Returns NULL for invalid types. | |
20346 | ||
02142a6c | 20347 | This first does a lookup in die_type_hash, |
673bfd45 DE |
20348 | and only reads the die in if necessary. |
20349 | ||
20350 | NOTE: This can be called when reading in partial or full symbols. */ | |
20351 | ||
f792889a | 20352 | static struct type * |
e7c27a73 | 20353 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20354 | { |
f792889a DJ |
20355 | struct type *this_type; |
20356 | ||
20357 | this_type = get_die_type (die, cu); | |
20358 | if (this_type) | |
20359 | return this_type; | |
20360 | ||
673bfd45 DE |
20361 | return read_type_die_1 (die, cu); |
20362 | } | |
20363 | ||
20364 | /* Read the type in DIE, CU. | |
20365 | Returns NULL for invalid types. */ | |
20366 | ||
20367 | static struct type * | |
20368 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
20369 | { | |
20370 | struct type *this_type = NULL; | |
20371 | ||
c906108c SS |
20372 | switch (die->tag) |
20373 | { | |
20374 | case DW_TAG_class_type: | |
680b30c7 | 20375 | case DW_TAG_interface_type: |
c906108c SS |
20376 | case DW_TAG_structure_type: |
20377 | case DW_TAG_union_type: | |
f792889a | 20378 | this_type = read_structure_type (die, cu); |
c906108c SS |
20379 | break; |
20380 | case DW_TAG_enumeration_type: | |
f792889a | 20381 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
20382 | break; |
20383 | case DW_TAG_subprogram: | |
20384 | case DW_TAG_subroutine_type: | |
edb3359d | 20385 | case DW_TAG_inlined_subroutine: |
f792889a | 20386 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
20387 | break; |
20388 | case DW_TAG_array_type: | |
f792889a | 20389 | this_type = read_array_type (die, cu); |
c906108c | 20390 | break; |
72019c9c | 20391 | case DW_TAG_set_type: |
f792889a | 20392 | this_type = read_set_type (die, cu); |
72019c9c | 20393 | break; |
c906108c | 20394 | case DW_TAG_pointer_type: |
f792889a | 20395 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
20396 | break; |
20397 | case DW_TAG_ptr_to_member_type: | |
f792889a | 20398 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
20399 | break; |
20400 | case DW_TAG_reference_type: | |
4297a3f0 AV |
20401 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
20402 | break; | |
20403 | case DW_TAG_rvalue_reference_type: | |
20404 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
20405 | break; |
20406 | case DW_TAG_const_type: | |
f792889a | 20407 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
20408 | break; |
20409 | case DW_TAG_volatile_type: | |
f792889a | 20410 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 20411 | break; |
06d66ee9 TT |
20412 | case DW_TAG_restrict_type: |
20413 | this_type = read_tag_restrict_type (die, cu); | |
20414 | break; | |
c906108c | 20415 | case DW_TAG_string_type: |
f792889a | 20416 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
20417 | break; |
20418 | case DW_TAG_typedef: | |
f792889a | 20419 | this_type = read_typedef (die, cu); |
c906108c | 20420 | break; |
a02abb62 | 20421 | case DW_TAG_subrange_type: |
f792889a | 20422 | this_type = read_subrange_type (die, cu); |
a02abb62 | 20423 | break; |
c906108c | 20424 | case DW_TAG_base_type: |
f792889a | 20425 | this_type = read_base_type (die, cu); |
c906108c | 20426 | break; |
81a17f79 | 20427 | case DW_TAG_unspecified_type: |
f792889a | 20428 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 20429 | break; |
0114d602 DJ |
20430 | case DW_TAG_namespace: |
20431 | this_type = read_namespace_type (die, cu); | |
20432 | break; | |
f55ee35c JK |
20433 | case DW_TAG_module: |
20434 | this_type = read_module_type (die, cu); | |
20435 | break; | |
a2c2acaf MW |
20436 | case DW_TAG_atomic_type: |
20437 | this_type = read_tag_atomic_type (die, cu); | |
20438 | break; | |
c906108c | 20439 | default: |
3e43a32a MS |
20440 | complaint (&symfile_complaints, |
20441 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 20442 | dwarf_tag_name (die->tag)); |
c906108c SS |
20443 | break; |
20444 | } | |
63d06c5c | 20445 | |
f792889a | 20446 | return this_type; |
63d06c5c DC |
20447 | } |
20448 | ||
abc72ce4 DE |
20449 | /* See if we can figure out if the class lives in a namespace. We do |
20450 | this by looking for a member function; its demangled name will | |
20451 | contain namespace info, if there is any. | |
20452 | Return the computed name or NULL. | |
20453 | Space for the result is allocated on the objfile's obstack. | |
20454 | This is the full-die version of guess_partial_die_structure_name. | |
20455 | In this case we know DIE has no useful parent. */ | |
20456 | ||
20457 | static char * | |
20458 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
20459 | { | |
20460 | struct die_info *spec_die; | |
20461 | struct dwarf2_cu *spec_cu; | |
20462 | struct die_info *child; | |
20463 | ||
20464 | spec_cu = cu; | |
20465 | spec_die = die_specification (die, &spec_cu); | |
20466 | if (spec_die != NULL) | |
20467 | { | |
20468 | die = spec_die; | |
20469 | cu = spec_cu; | |
20470 | } | |
20471 | ||
20472 | for (child = die->child; | |
20473 | child != NULL; | |
20474 | child = child->sibling) | |
20475 | { | |
20476 | if (child->tag == DW_TAG_subprogram) | |
20477 | { | |
73b9be8b | 20478 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 20479 | |
7d45c7c3 | 20480 | if (linkage_name != NULL) |
abc72ce4 DE |
20481 | { |
20482 | char *actual_name | |
20483 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 20484 | linkage_name); |
abc72ce4 DE |
20485 | char *name = NULL; |
20486 | ||
20487 | if (actual_name != NULL) | |
20488 | { | |
15d034d0 | 20489 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
20490 | |
20491 | if (die_name != NULL | |
20492 | && strcmp (die_name, actual_name) != 0) | |
20493 | { | |
20494 | /* Strip off the class name from the full name. | |
20495 | We want the prefix. */ | |
20496 | int die_name_len = strlen (die_name); | |
20497 | int actual_name_len = strlen (actual_name); | |
20498 | ||
20499 | /* Test for '::' as a sanity check. */ | |
20500 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
20501 | && actual_name[actual_name_len |
20502 | - die_name_len - 1] == ':') | |
224c3ddb SM |
20503 | name = (char *) obstack_copy0 ( |
20504 | &cu->objfile->per_bfd->storage_obstack, | |
20505 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
20506 | } |
20507 | } | |
20508 | xfree (actual_name); | |
20509 | return name; | |
20510 | } | |
20511 | } | |
20512 | } | |
20513 | ||
20514 | return NULL; | |
20515 | } | |
20516 | ||
96408a79 SA |
20517 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
20518 | prefix part in such case. See | |
20519 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20520 | ||
a121b7c1 | 20521 | static const char * |
96408a79 SA |
20522 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
20523 | { | |
20524 | struct attribute *attr; | |
e6a959d6 | 20525 | const char *base; |
96408a79 SA |
20526 | |
20527 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
20528 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
20529 | return NULL; | |
20530 | ||
7d45c7c3 | 20531 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
20532 | return NULL; |
20533 | ||
73b9be8b | 20534 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
20535 | if (attr == NULL || DW_STRING (attr) == NULL) |
20536 | return NULL; | |
20537 | ||
20538 | /* dwarf2_name had to be already called. */ | |
20539 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
20540 | ||
20541 | /* Strip the base name, keep any leading namespaces/classes. */ | |
20542 | base = strrchr (DW_STRING (attr), ':'); | |
20543 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
20544 | return ""; | |
20545 | ||
224c3ddb SM |
20546 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
20547 | DW_STRING (attr), | |
20548 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
20549 | } |
20550 | ||
fdde2d81 | 20551 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 20552 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 20553 | |
0114d602 DJ |
20554 | For example, if we're within the method foo() in the following |
20555 | code: | |
20556 | ||
20557 | namespace N { | |
20558 | class C { | |
20559 | void foo () { | |
20560 | } | |
20561 | }; | |
20562 | } | |
20563 | ||
20564 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 20565 | |
0d5cff50 | 20566 | static const char * |
e142c38c | 20567 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 20568 | { |
0114d602 DJ |
20569 | struct die_info *parent, *spec_die; |
20570 | struct dwarf2_cu *spec_cu; | |
20571 | struct type *parent_type; | |
a121b7c1 | 20572 | const char *retval; |
63d06c5c | 20573 | |
9c37b5ae | 20574 | if (cu->language != language_cplus |
c44af4eb TT |
20575 | && cu->language != language_fortran && cu->language != language_d |
20576 | && cu->language != language_rust) | |
0114d602 DJ |
20577 | return ""; |
20578 | ||
96408a79 SA |
20579 | retval = anonymous_struct_prefix (die, cu); |
20580 | if (retval) | |
20581 | return retval; | |
20582 | ||
0114d602 DJ |
20583 | /* We have to be careful in the presence of DW_AT_specification. |
20584 | For example, with GCC 3.4, given the code | |
20585 | ||
20586 | namespace N { | |
20587 | void foo() { | |
20588 | // Definition of N::foo. | |
20589 | } | |
20590 | } | |
20591 | ||
20592 | then we'll have a tree of DIEs like this: | |
20593 | ||
20594 | 1: DW_TAG_compile_unit | |
20595 | 2: DW_TAG_namespace // N | |
20596 | 3: DW_TAG_subprogram // declaration of N::foo | |
20597 | 4: DW_TAG_subprogram // definition of N::foo | |
20598 | DW_AT_specification // refers to die #3 | |
20599 | ||
20600 | Thus, when processing die #4, we have to pretend that we're in | |
20601 | the context of its DW_AT_specification, namely the contex of die | |
20602 | #3. */ | |
20603 | spec_cu = cu; | |
20604 | spec_die = die_specification (die, &spec_cu); | |
20605 | if (spec_die == NULL) | |
20606 | parent = die->parent; | |
20607 | else | |
63d06c5c | 20608 | { |
0114d602 DJ |
20609 | parent = spec_die->parent; |
20610 | cu = spec_cu; | |
63d06c5c | 20611 | } |
0114d602 DJ |
20612 | |
20613 | if (parent == NULL) | |
20614 | return ""; | |
98bfdba5 PA |
20615 | else if (parent->building_fullname) |
20616 | { | |
20617 | const char *name; | |
20618 | const char *parent_name; | |
20619 | ||
20620 | /* It has been seen on RealView 2.2 built binaries, | |
20621 | DW_TAG_template_type_param types actually _defined_ as | |
20622 | children of the parent class: | |
20623 | ||
20624 | enum E {}; | |
20625 | template class <class Enum> Class{}; | |
20626 | Class<enum E> class_e; | |
20627 | ||
20628 | 1: DW_TAG_class_type (Class) | |
20629 | 2: DW_TAG_enumeration_type (E) | |
20630 | 3: DW_TAG_enumerator (enum1:0) | |
20631 | 3: DW_TAG_enumerator (enum2:1) | |
20632 | ... | |
20633 | 2: DW_TAG_template_type_param | |
20634 | DW_AT_type DW_FORM_ref_udata (E) | |
20635 | ||
20636 | Besides being broken debug info, it can put GDB into an | |
20637 | infinite loop. Consider: | |
20638 | ||
20639 | When we're building the full name for Class<E>, we'll start | |
20640 | at Class, and go look over its template type parameters, | |
20641 | finding E. We'll then try to build the full name of E, and | |
20642 | reach here. We're now trying to build the full name of E, | |
20643 | and look over the parent DIE for containing scope. In the | |
20644 | broken case, if we followed the parent DIE of E, we'd again | |
20645 | find Class, and once again go look at its template type | |
20646 | arguments, etc., etc. Simply don't consider such parent die | |
20647 | as source-level parent of this die (it can't be, the language | |
20648 | doesn't allow it), and break the loop here. */ | |
20649 | name = dwarf2_name (die, cu); | |
20650 | parent_name = dwarf2_name (parent, cu); | |
20651 | complaint (&symfile_complaints, | |
20652 | _("template param type '%s' defined within parent '%s'"), | |
20653 | name ? name : "<unknown>", | |
20654 | parent_name ? parent_name : "<unknown>"); | |
20655 | return ""; | |
20656 | } | |
63d06c5c | 20657 | else |
0114d602 DJ |
20658 | switch (parent->tag) |
20659 | { | |
63d06c5c | 20660 | case DW_TAG_namespace: |
0114d602 | 20661 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20662 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20663 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20664 | Work around this problem here. */ | |
20665 | if (cu->language == language_cplus | |
20666 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
20667 | return ""; | |
0114d602 DJ |
20668 | /* We give a name to even anonymous namespaces. */ |
20669 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 20670 | case DW_TAG_class_type: |
680b30c7 | 20671 | case DW_TAG_interface_type: |
63d06c5c | 20672 | case DW_TAG_structure_type: |
0114d602 | 20673 | case DW_TAG_union_type: |
f55ee35c | 20674 | case DW_TAG_module: |
0114d602 DJ |
20675 | parent_type = read_type_die (parent, cu); |
20676 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20677 | return TYPE_TAG_NAME (parent_type); | |
20678 | else | |
20679 | /* An anonymous structure is only allowed non-static data | |
20680 | members; no typedefs, no member functions, et cetera. | |
20681 | So it does not need a prefix. */ | |
20682 | return ""; | |
abc72ce4 | 20683 | case DW_TAG_compile_unit: |
95554aad | 20684 | case DW_TAG_partial_unit: |
abc72ce4 DE |
20685 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
20686 | if (cu->language == language_cplus | |
8b70b953 | 20687 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
20688 | && die->child != NULL |
20689 | && (die->tag == DW_TAG_class_type | |
20690 | || die->tag == DW_TAG_structure_type | |
20691 | || die->tag == DW_TAG_union_type)) | |
20692 | { | |
20693 | char *name = guess_full_die_structure_name (die, cu); | |
20694 | if (name != NULL) | |
20695 | return name; | |
20696 | } | |
20697 | return ""; | |
3d567982 TT |
20698 | case DW_TAG_enumeration_type: |
20699 | parent_type = read_type_die (parent, cu); | |
20700 | if (TYPE_DECLARED_CLASS (parent_type)) | |
20701 | { | |
20702 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20703 | return TYPE_TAG_NAME (parent_type); | |
20704 | return ""; | |
20705 | } | |
20706 | /* Fall through. */ | |
63d06c5c | 20707 | default: |
8176b9b8 | 20708 | return determine_prefix (parent, cu); |
63d06c5c | 20709 | } |
63d06c5c DC |
20710 | } |
20711 | ||
3e43a32a MS |
20712 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
20713 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
20714 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
20715 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
20716 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 20717 | |
f55ee35c | 20718 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
20719 | |
20720 | static char * | |
f55ee35c JK |
20721 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
20722 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 20723 | { |
f55ee35c | 20724 | const char *lead = ""; |
5c315b68 | 20725 | const char *sep; |
63d06c5c | 20726 | |
3e43a32a MS |
20727 | if (suffix == NULL || suffix[0] == '\0' |
20728 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 20729 | sep = ""; |
45280282 IB |
20730 | else if (cu->language == language_d) |
20731 | { | |
20732 | /* For D, the 'main' function could be defined in any module, but it | |
20733 | should never be prefixed. */ | |
20734 | if (strcmp (suffix, "D main") == 0) | |
20735 | { | |
20736 | prefix = ""; | |
20737 | sep = ""; | |
20738 | } | |
20739 | else | |
20740 | sep = "."; | |
20741 | } | |
f55ee35c JK |
20742 | else if (cu->language == language_fortran && physname) |
20743 | { | |
20744 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
20745 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
20746 | ||
20747 | lead = "__"; | |
20748 | sep = "_MOD_"; | |
20749 | } | |
987504bb JJ |
20750 | else |
20751 | sep = "::"; | |
63d06c5c | 20752 | |
6dd47d34 DE |
20753 | if (prefix == NULL) |
20754 | prefix = ""; | |
20755 | if (suffix == NULL) | |
20756 | suffix = ""; | |
20757 | ||
987504bb JJ |
20758 | if (obs == NULL) |
20759 | { | |
3e43a32a | 20760 | char *retval |
224c3ddb SM |
20761 | = ((char *) |
20762 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 20763 | |
f55ee35c JK |
20764 | strcpy (retval, lead); |
20765 | strcat (retval, prefix); | |
6dd47d34 DE |
20766 | strcat (retval, sep); |
20767 | strcat (retval, suffix); | |
63d06c5c DC |
20768 | return retval; |
20769 | } | |
987504bb JJ |
20770 | else |
20771 | { | |
20772 | /* We have an obstack. */ | |
f55ee35c | 20773 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 20774 | } |
63d06c5c DC |
20775 | } |
20776 | ||
c906108c SS |
20777 | /* Return sibling of die, NULL if no sibling. */ |
20778 | ||
f9aca02d | 20779 | static struct die_info * |
fba45db2 | 20780 | sibling_die (struct die_info *die) |
c906108c | 20781 | { |
639d11d3 | 20782 | return die->sibling; |
c906108c SS |
20783 | } |
20784 | ||
71c25dea TT |
20785 | /* Get name of a die, return NULL if not found. */ |
20786 | ||
15d034d0 TT |
20787 | static const char * |
20788 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
20789 | struct obstack *obstack) |
20790 | { | |
20791 | if (name && cu->language == language_cplus) | |
20792 | { | |
2f408ecb | 20793 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 20794 | |
2f408ecb | 20795 | if (!canon_name.empty ()) |
71c25dea | 20796 | { |
2f408ecb PA |
20797 | if (canon_name != name) |
20798 | name = (const char *) obstack_copy0 (obstack, | |
20799 | canon_name.c_str (), | |
20800 | canon_name.length ()); | |
71c25dea TT |
20801 | } |
20802 | } | |
20803 | ||
20804 | return name; | |
c906108c SS |
20805 | } |
20806 | ||
96553a0c DE |
20807 | /* Get name of a die, return NULL if not found. |
20808 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 20809 | |
15d034d0 | 20810 | static const char * |
e142c38c | 20811 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
20812 | { |
20813 | struct attribute *attr; | |
20814 | ||
e142c38c | 20815 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 20816 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 20817 | && die->tag != DW_TAG_namespace |
53832f31 TT |
20818 | && die->tag != DW_TAG_class_type |
20819 | && die->tag != DW_TAG_interface_type | |
20820 | && die->tag != DW_TAG_structure_type | |
20821 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
20822 | return NULL; |
20823 | ||
20824 | switch (die->tag) | |
20825 | { | |
20826 | case DW_TAG_compile_unit: | |
95554aad | 20827 | case DW_TAG_partial_unit: |
71c25dea TT |
20828 | /* Compilation units have a DW_AT_name that is a filename, not |
20829 | a source language identifier. */ | |
20830 | case DW_TAG_enumeration_type: | |
20831 | case DW_TAG_enumerator: | |
20832 | /* These tags always have simple identifiers already; no need | |
20833 | to canonicalize them. */ | |
20834 | return DW_STRING (attr); | |
907af001 | 20835 | |
96553a0c DE |
20836 | case DW_TAG_namespace: |
20837 | if (attr != NULL && DW_STRING (attr) != NULL) | |
20838 | return DW_STRING (attr); | |
20839 | return CP_ANONYMOUS_NAMESPACE_STR; | |
20840 | ||
907af001 UW |
20841 | case DW_TAG_class_type: |
20842 | case DW_TAG_interface_type: | |
20843 | case DW_TAG_structure_type: | |
20844 | case DW_TAG_union_type: | |
20845 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
20846 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
20847 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
20848 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 20849 | if (attr && DW_STRING (attr) |
61012eef GB |
20850 | && (startswith (DW_STRING (attr), "._") |
20851 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 20852 | return NULL; |
53832f31 TT |
20853 | |
20854 | /* GCC might emit a nameless typedef that has a linkage name. See | |
20855 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20856 | if (!attr || DW_STRING (attr) == NULL) | |
20857 | { | |
df5c6c50 | 20858 | char *demangled = NULL; |
53832f31 | 20859 | |
73b9be8b | 20860 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
20861 | if (attr == NULL || DW_STRING (attr) == NULL) |
20862 | return NULL; | |
20863 | ||
df5c6c50 JK |
20864 | /* Avoid demangling DW_STRING (attr) the second time on a second |
20865 | call for the same DIE. */ | |
20866 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 20867 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
20868 | |
20869 | if (demangled) | |
20870 | { | |
e6a959d6 | 20871 | const char *base; |
96408a79 | 20872 | |
53832f31 | 20873 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 20874 | DW_STRING (attr) |
224c3ddb SM |
20875 | = ((const char *) |
20876 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
20877 | demangled, strlen (demangled))); | |
53832f31 TT |
20878 | DW_STRING_IS_CANONICAL (attr) = 1; |
20879 | xfree (demangled); | |
96408a79 SA |
20880 | |
20881 | /* Strip any leading namespaces/classes, keep only the base name. | |
20882 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
20883 | base = strrchr (DW_STRING (attr), ':'); | |
20884 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
20885 | return &base[1]; | |
20886 | else | |
20887 | return DW_STRING (attr); | |
53832f31 TT |
20888 | } |
20889 | } | |
907af001 UW |
20890 | break; |
20891 | ||
71c25dea | 20892 | default: |
907af001 UW |
20893 | break; |
20894 | } | |
20895 | ||
20896 | if (!DW_STRING_IS_CANONICAL (attr)) | |
20897 | { | |
20898 | DW_STRING (attr) | |
20899 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 20900 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 20901 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 20902 | } |
907af001 | 20903 | return DW_STRING (attr); |
9219021c DC |
20904 | } |
20905 | ||
20906 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
20907 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
20908 | containing the return value on output. */ | |
9219021c DC |
20909 | |
20910 | static struct die_info * | |
f2f0e013 | 20911 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
20912 | { |
20913 | struct attribute *attr; | |
9219021c | 20914 | |
f2f0e013 | 20915 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
20916 | if (attr == NULL) |
20917 | return NULL; | |
20918 | ||
f2f0e013 | 20919 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
20920 | } |
20921 | ||
c906108c SS |
20922 | /* Convert a DIE tag into its string name. */ |
20923 | ||
f39c6ffd | 20924 | static const char * |
aa1ee363 | 20925 | dwarf_tag_name (unsigned tag) |
c906108c | 20926 | { |
f39c6ffd TT |
20927 | const char *name = get_DW_TAG_name (tag); |
20928 | ||
20929 | if (name == NULL) | |
20930 | return "DW_TAG_<unknown>"; | |
20931 | ||
20932 | return name; | |
c906108c SS |
20933 | } |
20934 | ||
20935 | /* Convert a DWARF attribute code into its string name. */ | |
20936 | ||
f39c6ffd | 20937 | static const char * |
aa1ee363 | 20938 | dwarf_attr_name (unsigned attr) |
c906108c | 20939 | { |
f39c6ffd TT |
20940 | const char *name; |
20941 | ||
c764a876 | 20942 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
20943 | if (attr == DW_AT_MIPS_fde) |
20944 | return "DW_AT_MIPS_fde"; | |
20945 | #else | |
20946 | if (attr == DW_AT_HP_block_index) | |
20947 | return "DW_AT_HP_block_index"; | |
c764a876 | 20948 | #endif |
f39c6ffd TT |
20949 | |
20950 | name = get_DW_AT_name (attr); | |
20951 | ||
20952 | if (name == NULL) | |
20953 | return "DW_AT_<unknown>"; | |
20954 | ||
20955 | return name; | |
c906108c SS |
20956 | } |
20957 | ||
20958 | /* Convert a DWARF value form code into its string name. */ | |
20959 | ||
f39c6ffd | 20960 | static const char * |
aa1ee363 | 20961 | dwarf_form_name (unsigned form) |
c906108c | 20962 | { |
f39c6ffd TT |
20963 | const char *name = get_DW_FORM_name (form); |
20964 | ||
20965 | if (name == NULL) | |
20966 | return "DW_FORM_<unknown>"; | |
20967 | ||
20968 | return name; | |
c906108c SS |
20969 | } |
20970 | ||
a121b7c1 | 20971 | static const char * |
fba45db2 | 20972 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
20973 | { |
20974 | if (mybool) | |
20975 | return "TRUE"; | |
20976 | else | |
20977 | return "FALSE"; | |
20978 | } | |
20979 | ||
20980 | /* Convert a DWARF type code into its string name. */ | |
20981 | ||
f39c6ffd | 20982 | static const char * |
aa1ee363 | 20983 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 20984 | { |
f39c6ffd | 20985 | const char *name = get_DW_ATE_name (enc); |
c906108c | 20986 | |
f39c6ffd TT |
20987 | if (name == NULL) |
20988 | return "DW_ATE_<unknown>"; | |
c906108c | 20989 | |
f39c6ffd | 20990 | return name; |
c906108c | 20991 | } |
c906108c | 20992 | |
f9aca02d | 20993 | static void |
d97bc12b | 20994 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
20995 | { |
20996 | unsigned int i; | |
20997 | ||
d97bc12b DE |
20998 | print_spaces (indent, f); |
20999 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
21000 | dwarf_tag_name (die->tag), die->abbrev, |
21001 | to_underlying (die->sect_off)); | |
d97bc12b DE |
21002 | |
21003 | if (die->parent != NULL) | |
21004 | { | |
21005 | print_spaces (indent, f); | |
21006 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 21007 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
21008 | } |
21009 | ||
21010 | print_spaces (indent, f); | |
21011 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21012 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21013 | |
d97bc12b DE |
21014 | print_spaces (indent, f); |
21015 | fprintf_unfiltered (f, " attributes:\n"); | |
21016 | ||
c906108c SS |
21017 | for (i = 0; i < die->num_attrs; ++i) |
21018 | { | |
d97bc12b DE |
21019 | print_spaces (indent, f); |
21020 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21021 | dwarf_attr_name (die->attrs[i].name), |
21022 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21023 | |
c906108c SS |
21024 | switch (die->attrs[i].form) |
21025 | { | |
c906108c | 21026 | case DW_FORM_addr: |
3019eac3 | 21027 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21028 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21029 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21030 | break; |
21031 | case DW_FORM_block2: | |
21032 | case DW_FORM_block4: | |
21033 | case DW_FORM_block: | |
21034 | case DW_FORM_block1: | |
56eb65bd SP |
21035 | fprintf_unfiltered (f, "block: size %s", |
21036 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21037 | break; |
2dc7f7b3 | 21038 | case DW_FORM_exprloc: |
56eb65bd SP |
21039 | fprintf_unfiltered (f, "expression: size %s", |
21040 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21041 | break; |
0224619f JK |
21042 | case DW_FORM_data16: |
21043 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21044 | break; | |
4568ecf9 DE |
21045 | case DW_FORM_ref_addr: |
21046 | fprintf_unfiltered (f, "ref address: "); | |
21047 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21048 | break; | |
36586728 TT |
21049 | case DW_FORM_GNU_ref_alt: |
21050 | fprintf_unfiltered (f, "alt ref address: "); | |
21051 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21052 | break; | |
10b3939b DJ |
21053 | case DW_FORM_ref1: |
21054 | case DW_FORM_ref2: | |
21055 | case DW_FORM_ref4: | |
4568ecf9 DE |
21056 | case DW_FORM_ref8: |
21057 | case DW_FORM_ref_udata: | |
d97bc12b | 21058 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21059 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21060 | break; |
c906108c SS |
21061 | case DW_FORM_data1: |
21062 | case DW_FORM_data2: | |
21063 | case DW_FORM_data4: | |
ce5d95e1 | 21064 | case DW_FORM_data8: |
c906108c SS |
21065 | case DW_FORM_udata: |
21066 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21067 | fprintf_unfiltered (f, "constant: %s", |
21068 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21069 | break; |
2dc7f7b3 TT |
21070 | case DW_FORM_sec_offset: |
21071 | fprintf_unfiltered (f, "section offset: %s", | |
21072 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21073 | break; | |
55f1336d | 21074 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21075 | fprintf_unfiltered (f, "signature: %s", |
21076 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21077 | break; |
c906108c | 21078 | case DW_FORM_string: |
4bdf3d34 | 21079 | case DW_FORM_strp: |
43988095 | 21080 | case DW_FORM_line_strp: |
3019eac3 | 21081 | case DW_FORM_GNU_str_index: |
36586728 | 21082 | case DW_FORM_GNU_strp_alt: |
8285870a | 21083 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 21084 | DW_STRING (&die->attrs[i]) |
8285870a JK |
21085 | ? DW_STRING (&die->attrs[i]) : "", |
21086 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
21087 | break; |
21088 | case DW_FORM_flag: | |
21089 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 21090 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 21091 | else |
d97bc12b | 21092 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 21093 | break; |
2dc7f7b3 TT |
21094 | case DW_FORM_flag_present: |
21095 | fprintf_unfiltered (f, "flag: TRUE"); | |
21096 | break; | |
a8329558 | 21097 | case DW_FORM_indirect: |
0963b4bd MS |
21098 | /* The reader will have reduced the indirect form to |
21099 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
21100 | fprintf_unfiltered (f, |
21101 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 21102 | break; |
663c44ac JK |
21103 | case DW_FORM_implicit_const: |
21104 | fprintf_unfiltered (f, "constant: %s", | |
21105 | plongest (DW_SND (&die->attrs[i]))); | |
21106 | break; | |
c906108c | 21107 | default: |
d97bc12b | 21108 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 21109 | die->attrs[i].form); |
d97bc12b | 21110 | break; |
c906108c | 21111 | } |
d97bc12b | 21112 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
21113 | } |
21114 | } | |
21115 | ||
f9aca02d | 21116 | static void |
d97bc12b | 21117 | dump_die_for_error (struct die_info *die) |
c906108c | 21118 | { |
d97bc12b DE |
21119 | dump_die_shallow (gdb_stderr, 0, die); |
21120 | } | |
21121 | ||
21122 | static void | |
21123 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
21124 | { | |
21125 | int indent = level * 4; | |
21126 | ||
21127 | gdb_assert (die != NULL); | |
21128 | ||
21129 | if (level >= max_level) | |
21130 | return; | |
21131 | ||
21132 | dump_die_shallow (f, indent, die); | |
21133 | ||
21134 | if (die->child != NULL) | |
c906108c | 21135 | { |
d97bc12b DE |
21136 | print_spaces (indent, f); |
21137 | fprintf_unfiltered (f, " Children:"); | |
21138 | if (level + 1 < max_level) | |
21139 | { | |
21140 | fprintf_unfiltered (f, "\n"); | |
21141 | dump_die_1 (f, level + 1, max_level, die->child); | |
21142 | } | |
21143 | else | |
21144 | { | |
3e43a32a MS |
21145 | fprintf_unfiltered (f, |
21146 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
21147 | } |
21148 | } | |
21149 | ||
21150 | if (die->sibling != NULL && level > 0) | |
21151 | { | |
21152 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
21153 | } |
21154 | } | |
21155 | ||
d97bc12b DE |
21156 | /* This is called from the pdie macro in gdbinit.in. |
21157 | It's not static so gcc will keep a copy callable from gdb. */ | |
21158 | ||
21159 | void | |
21160 | dump_die (struct die_info *die, int max_level) | |
21161 | { | |
21162 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
21163 | } | |
21164 | ||
f9aca02d | 21165 | static void |
51545339 | 21166 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21167 | { |
51545339 | 21168 | void **slot; |
c906108c | 21169 | |
9c541725 PA |
21170 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
21171 | to_underlying (die->sect_off), | |
b64f50a1 | 21172 | INSERT); |
51545339 DJ |
21173 | |
21174 | *slot = die; | |
c906108c SS |
21175 | } |
21176 | ||
b64f50a1 JK |
21177 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
21178 | required kind. */ | |
21179 | ||
21180 | static sect_offset | |
ff39bb5e | 21181 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 21182 | { |
7771576e | 21183 | if (attr_form_is_ref (attr)) |
9c541725 | 21184 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
21185 | |
21186 | complaint (&symfile_complaints, | |
21187 | _("unsupported die ref attribute form: '%s'"), | |
21188 | dwarf_form_name (attr->form)); | |
9c541725 | 21189 | return {}; |
c906108c SS |
21190 | } |
21191 | ||
43bbcdc2 PH |
21192 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
21193 | * the value held by the attribute is not constant. */ | |
a02abb62 | 21194 | |
43bbcdc2 | 21195 | static LONGEST |
ff39bb5e | 21196 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 21197 | { |
663c44ac | 21198 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
21199 | return DW_SND (attr); |
21200 | else if (attr->form == DW_FORM_udata | |
21201 | || attr->form == DW_FORM_data1 | |
21202 | || attr->form == DW_FORM_data2 | |
21203 | || attr->form == DW_FORM_data4 | |
21204 | || attr->form == DW_FORM_data8) | |
21205 | return DW_UNSND (attr); | |
21206 | else | |
21207 | { | |
0224619f | 21208 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
21209 | complaint (&symfile_complaints, |
21210 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
21211 | dwarf_form_name (attr->form)); |
21212 | return default_value; | |
21213 | } | |
21214 | } | |
21215 | ||
348e048f DE |
21216 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
21217 | On entry *REF_CU is the CU of SRC_DIE. | |
21218 | On exit *REF_CU is the CU of the result. */ | |
21219 | ||
21220 | static struct die_info * | |
ff39bb5e | 21221 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
21222 | struct dwarf2_cu **ref_cu) |
21223 | { | |
21224 | struct die_info *die; | |
21225 | ||
7771576e | 21226 | if (attr_form_is_ref (attr)) |
348e048f | 21227 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 21228 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
21229 | die = follow_die_sig (src_die, attr, ref_cu); |
21230 | else | |
21231 | { | |
21232 | dump_die_for_error (src_die); | |
21233 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 21234 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
21235 | } |
21236 | ||
21237 | return die; | |
03dd20cc DJ |
21238 | } |
21239 | ||
5c631832 | 21240 | /* Follow reference OFFSET. |
673bfd45 DE |
21241 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
21242 | On exit *REF_CU is the CU of the result. | |
21243 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 21244 | |
f9aca02d | 21245 | static struct die_info * |
9c541725 | 21246 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 21247 | struct dwarf2_cu **ref_cu) |
c906108c | 21248 | { |
10b3939b | 21249 | struct die_info temp_die; |
f2f0e013 | 21250 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 21251 | |
348e048f DE |
21252 | gdb_assert (cu->per_cu != NULL); |
21253 | ||
98bfdba5 PA |
21254 | target_cu = cu; |
21255 | ||
3019eac3 | 21256 | if (cu->per_cu->is_debug_types) |
348e048f DE |
21257 | { |
21258 | /* .debug_types CUs cannot reference anything outside their CU. | |
21259 | If they need to, they have to reference a signatured type via | |
55f1336d | 21260 | DW_FORM_ref_sig8. */ |
9c541725 | 21261 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 21262 | return NULL; |
348e048f | 21263 | } |
36586728 | 21264 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 21265 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
21266 | { |
21267 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 21268 | |
9c541725 | 21269 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 21270 | cu->objfile); |
03dd20cc DJ |
21271 | |
21272 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
21273 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
21274 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 21275 | |
10b3939b DJ |
21276 | target_cu = per_cu->cu; |
21277 | } | |
98bfdba5 PA |
21278 | else if (cu->dies == NULL) |
21279 | { | |
21280 | /* We're loading full DIEs during partial symbol reading. */ | |
21281 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 21282 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 21283 | } |
c906108c | 21284 | |
f2f0e013 | 21285 | *ref_cu = target_cu; |
9c541725 | 21286 | temp_die.sect_off = sect_off; |
9a3c8263 | 21287 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
21288 | &temp_die, |
21289 | to_underlying (sect_off)); | |
5c631832 | 21290 | } |
10b3939b | 21291 | |
5c631832 JK |
21292 | /* Follow reference attribute ATTR of SRC_DIE. |
21293 | On entry *REF_CU is the CU of SRC_DIE. | |
21294 | On exit *REF_CU is the CU of the result. */ | |
21295 | ||
21296 | static struct die_info * | |
ff39bb5e | 21297 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
21298 | struct dwarf2_cu **ref_cu) |
21299 | { | |
9c541725 | 21300 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
21301 | struct dwarf2_cu *cu = *ref_cu; |
21302 | struct die_info *die; | |
21303 | ||
9c541725 | 21304 | die = follow_die_offset (sect_off, |
36586728 TT |
21305 | (attr->form == DW_FORM_GNU_ref_alt |
21306 | || cu->per_cu->is_dwz), | |
21307 | ref_cu); | |
5c631832 JK |
21308 | if (!die) |
21309 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
21310 | "at 0x%x [in module %s]"), | |
9c541725 | 21311 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 21312 | objfile_name (cu->objfile)); |
348e048f | 21313 | |
5c631832 JK |
21314 | return die; |
21315 | } | |
21316 | ||
9c541725 | 21317 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
21318 | Returned value is intended for DW_OP_call*. Returned |
21319 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
21320 | |
21321 | struct dwarf2_locexpr_baton | |
9c541725 | 21322 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
21323 | struct dwarf2_per_cu_data *per_cu, |
21324 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21325 | void *baton) | |
5c631832 | 21326 | { |
918dd910 | 21327 | struct dwarf2_cu *cu; |
5c631832 JK |
21328 | struct die_info *die; |
21329 | struct attribute *attr; | |
21330 | struct dwarf2_locexpr_baton retval; | |
21331 | ||
8cf6f0b1 TT |
21332 | dw2_setup (per_cu->objfile); |
21333 | ||
918dd910 JK |
21334 | if (per_cu->cu == NULL) |
21335 | load_cu (per_cu); | |
21336 | cu = per_cu->cu; | |
cc12ce38 DE |
21337 | if (cu == NULL) |
21338 | { | |
21339 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21340 | Instead just throw an error, not much else we can do. */ | |
21341 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21342 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21343 | } |
918dd910 | 21344 | |
9c541725 | 21345 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
21346 | if (!die) |
21347 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21348 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21349 | |
21350 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21351 | if (!attr) | |
21352 | { | |
e103e986 JK |
21353 | /* DWARF: "If there is no such attribute, then there is no effect.". |
21354 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 21355 | |
e103e986 | 21356 | retval.data = NULL; |
5c631832 JK |
21357 | retval.size = 0; |
21358 | } | |
8cf6f0b1 TT |
21359 | else if (attr_form_is_section_offset (attr)) |
21360 | { | |
21361 | struct dwarf2_loclist_baton loclist_baton; | |
21362 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
21363 | size_t size; | |
21364 | ||
21365 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
21366 | ||
21367 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
21368 | &size, pc); | |
21369 | retval.size = size; | |
21370 | } | |
5c631832 JK |
21371 | else |
21372 | { | |
21373 | if (!attr_form_is_block (attr)) | |
21374 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
21375 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 21376 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
21377 | |
21378 | retval.data = DW_BLOCK (attr)->data; | |
21379 | retval.size = DW_BLOCK (attr)->size; | |
21380 | } | |
21381 | retval.per_cu = cu->per_cu; | |
918dd910 | 21382 | |
918dd910 JK |
21383 | age_cached_comp_units (); |
21384 | ||
5c631832 | 21385 | return retval; |
348e048f DE |
21386 | } |
21387 | ||
8b9737bf TT |
21388 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
21389 | offset. */ | |
21390 | ||
21391 | struct dwarf2_locexpr_baton | |
21392 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
21393 | struct dwarf2_per_cu_data *per_cu, | |
21394 | CORE_ADDR (*get_frame_pc) (void *baton), | |
21395 | void *baton) | |
21396 | { | |
9c541725 | 21397 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 21398 | |
9c541725 | 21399 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
21400 | } |
21401 | ||
b6807d98 TT |
21402 | /* Write a constant of a given type as target-ordered bytes into |
21403 | OBSTACK. */ | |
21404 | ||
21405 | static const gdb_byte * | |
21406 | write_constant_as_bytes (struct obstack *obstack, | |
21407 | enum bfd_endian byte_order, | |
21408 | struct type *type, | |
21409 | ULONGEST value, | |
21410 | LONGEST *len) | |
21411 | { | |
21412 | gdb_byte *result; | |
21413 | ||
21414 | *len = TYPE_LENGTH (type); | |
224c3ddb | 21415 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21416 | store_unsigned_integer (result, *len, byte_order, value); |
21417 | ||
21418 | return result; | |
21419 | } | |
21420 | ||
21421 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
21422 | pointer to the constant bytes and set LEN to the length of the | |
21423 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
21424 | does not have a DW_AT_const_value, return NULL. */ | |
21425 | ||
21426 | const gdb_byte * | |
9c541725 | 21427 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
21428 | struct dwarf2_per_cu_data *per_cu, |
21429 | struct obstack *obstack, | |
21430 | LONGEST *len) | |
21431 | { | |
21432 | struct dwarf2_cu *cu; | |
21433 | struct die_info *die; | |
21434 | struct attribute *attr; | |
21435 | const gdb_byte *result = NULL; | |
21436 | struct type *type; | |
21437 | LONGEST value; | |
21438 | enum bfd_endian byte_order; | |
21439 | ||
21440 | dw2_setup (per_cu->objfile); | |
21441 | ||
21442 | if (per_cu->cu == NULL) | |
21443 | load_cu (per_cu); | |
21444 | cu = per_cu->cu; | |
cc12ce38 DE |
21445 | if (cu == NULL) |
21446 | { | |
21447 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
21448 | Instead just throw an error, not much else we can do. */ | |
21449 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 21450 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 21451 | } |
b6807d98 | 21452 | |
9c541725 | 21453 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
21454 | if (!die) |
21455 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 21456 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
21457 | |
21458 | ||
21459 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21460 | if (attr == NULL) | |
21461 | return NULL; | |
21462 | ||
21463 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
21464 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21465 | ||
21466 | switch (attr->form) | |
21467 | { | |
21468 | case DW_FORM_addr: | |
21469 | case DW_FORM_GNU_addr_index: | |
21470 | { | |
21471 | gdb_byte *tem; | |
21472 | ||
21473 | *len = cu->header.addr_size; | |
224c3ddb | 21474 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
21475 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
21476 | result = tem; | |
21477 | } | |
21478 | break; | |
21479 | case DW_FORM_string: | |
21480 | case DW_FORM_strp: | |
21481 | case DW_FORM_GNU_str_index: | |
21482 | case DW_FORM_GNU_strp_alt: | |
21483 | /* DW_STRING is already allocated on the objfile obstack, point | |
21484 | directly to it. */ | |
21485 | result = (const gdb_byte *) DW_STRING (attr); | |
21486 | *len = strlen (DW_STRING (attr)); | |
21487 | break; | |
21488 | case DW_FORM_block1: | |
21489 | case DW_FORM_block2: | |
21490 | case DW_FORM_block4: | |
21491 | case DW_FORM_block: | |
21492 | case DW_FORM_exprloc: | |
0224619f | 21493 | case DW_FORM_data16: |
b6807d98 TT |
21494 | result = DW_BLOCK (attr)->data; |
21495 | *len = DW_BLOCK (attr)->size; | |
21496 | break; | |
21497 | ||
21498 | /* The DW_AT_const_value attributes are supposed to carry the | |
21499 | symbol's value "represented as it would be on the target | |
21500 | architecture." By the time we get here, it's already been | |
21501 | converted to host endianness, so we just need to sign- or | |
21502 | zero-extend it as appropriate. */ | |
21503 | case DW_FORM_data1: | |
21504 | type = die_type (die, cu); | |
21505 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
21506 | if (result == NULL) | |
21507 | result = write_constant_as_bytes (obstack, byte_order, | |
21508 | type, value, len); | |
21509 | break; | |
21510 | case DW_FORM_data2: | |
21511 | type = die_type (die, cu); | |
21512 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
21513 | if (result == NULL) | |
21514 | result = write_constant_as_bytes (obstack, byte_order, | |
21515 | type, value, len); | |
21516 | break; | |
21517 | case DW_FORM_data4: | |
21518 | type = die_type (die, cu); | |
21519 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
21520 | if (result == NULL) | |
21521 | result = write_constant_as_bytes (obstack, byte_order, | |
21522 | type, value, len); | |
21523 | break; | |
21524 | case DW_FORM_data8: | |
21525 | type = die_type (die, cu); | |
21526 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
21527 | if (result == NULL) | |
21528 | result = write_constant_as_bytes (obstack, byte_order, | |
21529 | type, value, len); | |
21530 | break; | |
21531 | ||
21532 | case DW_FORM_sdata: | |
663c44ac | 21533 | case DW_FORM_implicit_const: |
b6807d98 TT |
21534 | type = die_type (die, cu); |
21535 | result = write_constant_as_bytes (obstack, byte_order, | |
21536 | type, DW_SND (attr), len); | |
21537 | break; | |
21538 | ||
21539 | case DW_FORM_udata: | |
21540 | type = die_type (die, cu); | |
21541 | result = write_constant_as_bytes (obstack, byte_order, | |
21542 | type, DW_UNSND (attr), len); | |
21543 | break; | |
21544 | ||
21545 | default: | |
21546 | complaint (&symfile_complaints, | |
21547 | _("unsupported const value attribute form: '%s'"), | |
21548 | dwarf_form_name (attr->form)); | |
21549 | break; | |
21550 | } | |
21551 | ||
21552 | return result; | |
21553 | } | |
21554 | ||
7942e96e AA |
21555 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
21556 | valid type for this die is found. */ | |
21557 | ||
21558 | struct type * | |
9c541725 | 21559 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
21560 | struct dwarf2_per_cu_data *per_cu) |
21561 | { | |
21562 | struct dwarf2_cu *cu; | |
21563 | struct die_info *die; | |
21564 | ||
21565 | dw2_setup (per_cu->objfile); | |
21566 | ||
21567 | if (per_cu->cu == NULL) | |
21568 | load_cu (per_cu); | |
21569 | cu = per_cu->cu; | |
21570 | if (!cu) | |
21571 | return NULL; | |
21572 | ||
9c541725 | 21573 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
21574 | if (!die) |
21575 | return NULL; | |
21576 | ||
21577 | return die_type (die, cu); | |
21578 | } | |
21579 | ||
8a9b8146 TT |
21580 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
21581 | PER_CU. */ | |
21582 | ||
21583 | struct type * | |
b64f50a1 | 21584 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
21585 | struct dwarf2_per_cu_data *per_cu) |
21586 | { | |
8a9b8146 | 21587 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21588 | |
9c541725 | 21589 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21590 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21591 | } |
21592 | ||
ac9ec31b | 21593 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21594 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21595 | On exit *REF_CU is the CU of the result. |
21596 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21597 | |
21598 | static struct die_info * | |
ac9ec31b DE |
21599 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21600 | struct dwarf2_cu **ref_cu) | |
348e048f | 21601 | { |
348e048f | 21602 | struct die_info temp_die; |
348e048f DE |
21603 | struct dwarf2_cu *sig_cu; |
21604 | struct die_info *die; | |
21605 | ||
ac9ec31b DE |
21606 | /* While it might be nice to assert sig_type->type == NULL here, |
21607 | we can get here for DW_AT_imported_declaration where we need | |
21608 | the DIE not the type. */ | |
348e048f DE |
21609 | |
21610 | /* If necessary, add it to the queue and load its DIEs. */ | |
21611 | ||
95554aad | 21612 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21613 | read_signatured_type (sig_type); |
348e048f | 21614 | |
348e048f | 21615 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21616 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21617 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21618 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21619 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21620 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21621 | if (die) |
21622 | { | |
796a7ff8 DE |
21623 | /* For .gdb_index version 7 keep track of included TUs. |
21624 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21625 | if (dwarf2_per_objfile->index_table != NULL | |
21626 | && dwarf2_per_objfile->index_table->version <= 7) | |
21627 | { | |
21628 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21629 | (*ref_cu)->per_cu->imported_symtabs, | |
21630 | sig_cu->per_cu); | |
21631 | } | |
21632 | ||
348e048f DE |
21633 | *ref_cu = sig_cu; |
21634 | return die; | |
21635 | } | |
21636 | ||
ac9ec31b DE |
21637 | return NULL; |
21638 | } | |
21639 | ||
21640 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21641 | On entry *REF_CU is the CU of SRC_DIE. | |
21642 | On exit *REF_CU is the CU of the result. | |
21643 | The result is the DIE of the type. | |
21644 | If the referenced type cannot be found an error is thrown. */ | |
21645 | ||
21646 | static struct die_info * | |
ff39bb5e | 21647 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21648 | struct dwarf2_cu **ref_cu) |
21649 | { | |
21650 | ULONGEST signature = DW_SIGNATURE (attr); | |
21651 | struct signatured_type *sig_type; | |
21652 | struct die_info *die; | |
21653 | ||
21654 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21655 | ||
a2ce51a0 | 21656 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21657 | /* sig_type will be NULL if the signatured type is missing from |
21658 | the debug info. */ | |
21659 | if (sig_type == NULL) | |
21660 | { | |
21661 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21662 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21663 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21664 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21665 | } |
21666 | ||
21667 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
21668 | if (die == NULL) | |
21669 | { | |
21670 | dump_die_for_error (src_die); | |
21671 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21672 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21673 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21674 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21675 | } |
21676 | ||
21677 | return die; | |
21678 | } | |
21679 | ||
21680 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
21681 | reading in and processing the type unit if necessary. */ | |
21682 | ||
21683 | static struct type * | |
21684 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
21685 | struct dwarf2_cu *cu) | |
21686 | { | |
21687 | struct signatured_type *sig_type; | |
21688 | struct dwarf2_cu *type_cu; | |
21689 | struct die_info *type_die; | |
21690 | struct type *type; | |
21691 | ||
a2ce51a0 | 21692 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
21693 | /* sig_type will be NULL if the signatured type is missing from |
21694 | the debug info. */ | |
21695 | if (sig_type == NULL) | |
21696 | { | |
21697 | complaint (&symfile_complaints, | |
21698 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21699 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21700 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21701 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21702 | return build_error_marker_type (cu, die); |
21703 | } | |
21704 | ||
21705 | /* If we already know the type we're done. */ | |
21706 | if (sig_type->type != NULL) | |
21707 | return sig_type->type; | |
21708 | ||
21709 | type_cu = cu; | |
21710 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
21711 | if (type_die != NULL) | |
21712 | { | |
21713 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
21714 | is created. This is important, for example, because for c++ classes | |
21715 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
21716 | type = read_type_die (type_die, type_cu); | |
21717 | if (type == NULL) | |
21718 | { | |
21719 | complaint (&symfile_complaints, | |
21720 | _("Dwarf Error: Cannot build signatured type %s" | |
21721 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 21722 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21723 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21724 | type = build_error_marker_type (cu, die); |
21725 | } | |
21726 | } | |
21727 | else | |
21728 | { | |
21729 | complaint (&symfile_complaints, | |
21730 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21731 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21732 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21733 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21734 | type = build_error_marker_type (cu, die); |
21735 | } | |
21736 | sig_type->type = type; | |
21737 | ||
21738 | return type; | |
21739 | } | |
21740 | ||
21741 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
21742 | reading in and processing the type unit if necessary. */ | |
21743 | ||
21744 | static struct type * | |
ff39bb5e | 21745 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 21746 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
21747 | { |
21748 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 21749 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
21750 | { |
21751 | struct dwarf2_cu *type_cu = cu; | |
21752 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
21753 | ||
21754 | return read_type_die (type_die, type_cu); | |
21755 | } | |
21756 | else if (attr->form == DW_FORM_ref_sig8) | |
21757 | { | |
21758 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
21759 | } | |
21760 | else | |
21761 | { | |
21762 | complaint (&symfile_complaints, | |
21763 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
21764 | " at 0x%x [in module %s]"), | |
9c541725 | 21765 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 21766 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21767 | return build_error_marker_type (cu, die); |
21768 | } | |
348e048f DE |
21769 | } |
21770 | ||
e5fe5e75 | 21771 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
21772 | |
21773 | static void | |
e5fe5e75 | 21774 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 21775 | { |
52dc124a | 21776 | struct signatured_type *sig_type; |
348e048f | 21777 | |
f4dc4d17 DE |
21778 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
21779 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
21780 | ||
6721b2ec DE |
21781 | /* We have the per_cu, but we need the signatured_type. |
21782 | Fortunately this is an easy translation. */ | |
21783 | gdb_assert (per_cu->is_debug_types); | |
21784 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 21785 | |
6721b2ec | 21786 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21787 | |
52dc124a | 21788 | read_signatured_type (sig_type); |
348e048f | 21789 | |
6721b2ec | 21790 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
21791 | } |
21792 | ||
dee91e82 DE |
21793 | /* die_reader_func for read_signatured_type. |
21794 | This is identical to load_full_comp_unit_reader, | |
21795 | but is kept separate for now. */ | |
348e048f DE |
21796 | |
21797 | static void | |
dee91e82 | 21798 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 21799 | const gdb_byte *info_ptr, |
dee91e82 DE |
21800 | struct die_info *comp_unit_die, |
21801 | int has_children, | |
21802 | void *data) | |
348e048f | 21803 | { |
dee91e82 | 21804 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 21805 | |
dee91e82 DE |
21806 | gdb_assert (cu->die_hash == NULL); |
21807 | cu->die_hash = | |
21808 | htab_create_alloc_ex (cu->header.length / 12, | |
21809 | die_hash, | |
21810 | die_eq, | |
21811 | NULL, | |
21812 | &cu->comp_unit_obstack, | |
21813 | hashtab_obstack_allocate, | |
21814 | dummy_obstack_deallocate); | |
348e048f | 21815 | |
dee91e82 DE |
21816 | if (has_children) |
21817 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
21818 | &info_ptr, comp_unit_die); | |
21819 | cu->dies = comp_unit_die; | |
21820 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
21821 | |
21822 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 21823 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 21824 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
21825 | or we won't be able to build types correctly. |
21826 | Similarly, if we do not read the producer, we can not apply | |
21827 | producer-specific interpretation. */ | |
95554aad | 21828 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 21829 | } |
348e048f | 21830 | |
3019eac3 DE |
21831 | /* Read in a signatured type and build its CU and DIEs. |
21832 | If the type is a stub for the real type in a DWO file, | |
21833 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
21834 | |
21835 | static void | |
21836 | read_signatured_type (struct signatured_type *sig_type) | |
21837 | { | |
21838 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 21839 | |
3019eac3 | 21840 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 21841 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21842 | |
f4dc4d17 DE |
21843 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
21844 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 21845 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
21846 | } |
21847 | ||
c906108c SS |
21848 | /* Decode simple location descriptions. |
21849 | Given a pointer to a dwarf block that defines a location, compute | |
21850 | the location and return the value. | |
21851 | ||
4cecd739 DJ |
21852 | NOTE drow/2003-11-18: This function is called in two situations |
21853 | now: for the address of static or global variables (partial symbols | |
21854 | only) and for offsets into structures which are expected to be | |
21855 | (more or less) constant. The partial symbol case should go away, | |
21856 | and only the constant case should remain. That will let this | |
21857 | function complain more accurately. A few special modes are allowed | |
21858 | without complaint for global variables (for instance, global | |
21859 | register values and thread-local values). | |
c906108c SS |
21860 | |
21861 | A location description containing no operations indicates that the | |
4cecd739 | 21862 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
21863 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
21864 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
21865 | complaint. |
21866 | ||
21867 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
21868 | |
21869 | static CORE_ADDR | |
e7c27a73 | 21870 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 21871 | { |
e7c27a73 | 21872 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
21873 | size_t i; |
21874 | size_t size = blk->size; | |
d521ce57 | 21875 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
21876 | CORE_ADDR stack[64]; |
21877 | int stacki; | |
21878 | unsigned int bytes_read, unsnd; | |
21879 | gdb_byte op; | |
c906108c | 21880 | |
21ae7a4d JK |
21881 | i = 0; |
21882 | stacki = 0; | |
21883 | stack[stacki] = 0; | |
21884 | stack[++stacki] = 0; | |
21885 | ||
21886 | while (i < size) | |
21887 | { | |
21888 | op = data[i++]; | |
21889 | switch (op) | |
21890 | { | |
21891 | case DW_OP_lit0: | |
21892 | case DW_OP_lit1: | |
21893 | case DW_OP_lit2: | |
21894 | case DW_OP_lit3: | |
21895 | case DW_OP_lit4: | |
21896 | case DW_OP_lit5: | |
21897 | case DW_OP_lit6: | |
21898 | case DW_OP_lit7: | |
21899 | case DW_OP_lit8: | |
21900 | case DW_OP_lit9: | |
21901 | case DW_OP_lit10: | |
21902 | case DW_OP_lit11: | |
21903 | case DW_OP_lit12: | |
21904 | case DW_OP_lit13: | |
21905 | case DW_OP_lit14: | |
21906 | case DW_OP_lit15: | |
21907 | case DW_OP_lit16: | |
21908 | case DW_OP_lit17: | |
21909 | case DW_OP_lit18: | |
21910 | case DW_OP_lit19: | |
21911 | case DW_OP_lit20: | |
21912 | case DW_OP_lit21: | |
21913 | case DW_OP_lit22: | |
21914 | case DW_OP_lit23: | |
21915 | case DW_OP_lit24: | |
21916 | case DW_OP_lit25: | |
21917 | case DW_OP_lit26: | |
21918 | case DW_OP_lit27: | |
21919 | case DW_OP_lit28: | |
21920 | case DW_OP_lit29: | |
21921 | case DW_OP_lit30: | |
21922 | case DW_OP_lit31: | |
21923 | stack[++stacki] = op - DW_OP_lit0; | |
21924 | break; | |
f1bea926 | 21925 | |
21ae7a4d JK |
21926 | case DW_OP_reg0: |
21927 | case DW_OP_reg1: | |
21928 | case DW_OP_reg2: | |
21929 | case DW_OP_reg3: | |
21930 | case DW_OP_reg4: | |
21931 | case DW_OP_reg5: | |
21932 | case DW_OP_reg6: | |
21933 | case DW_OP_reg7: | |
21934 | case DW_OP_reg8: | |
21935 | case DW_OP_reg9: | |
21936 | case DW_OP_reg10: | |
21937 | case DW_OP_reg11: | |
21938 | case DW_OP_reg12: | |
21939 | case DW_OP_reg13: | |
21940 | case DW_OP_reg14: | |
21941 | case DW_OP_reg15: | |
21942 | case DW_OP_reg16: | |
21943 | case DW_OP_reg17: | |
21944 | case DW_OP_reg18: | |
21945 | case DW_OP_reg19: | |
21946 | case DW_OP_reg20: | |
21947 | case DW_OP_reg21: | |
21948 | case DW_OP_reg22: | |
21949 | case DW_OP_reg23: | |
21950 | case DW_OP_reg24: | |
21951 | case DW_OP_reg25: | |
21952 | case DW_OP_reg26: | |
21953 | case DW_OP_reg27: | |
21954 | case DW_OP_reg28: | |
21955 | case DW_OP_reg29: | |
21956 | case DW_OP_reg30: | |
21957 | case DW_OP_reg31: | |
21958 | stack[++stacki] = op - DW_OP_reg0; | |
21959 | if (i < size) | |
21960 | dwarf2_complex_location_expr_complaint (); | |
21961 | break; | |
c906108c | 21962 | |
21ae7a4d JK |
21963 | case DW_OP_regx: |
21964 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
21965 | i += bytes_read; | |
21966 | stack[++stacki] = unsnd; | |
21967 | if (i < size) | |
21968 | dwarf2_complex_location_expr_complaint (); | |
21969 | break; | |
c906108c | 21970 | |
21ae7a4d JK |
21971 | case DW_OP_addr: |
21972 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
21973 | cu, &bytes_read); | |
21974 | i += bytes_read; | |
21975 | break; | |
d53d4ac5 | 21976 | |
21ae7a4d JK |
21977 | case DW_OP_const1u: |
21978 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
21979 | i += 1; | |
21980 | break; | |
21981 | ||
21982 | case DW_OP_const1s: | |
21983 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
21984 | i += 1; | |
21985 | break; | |
21986 | ||
21987 | case DW_OP_const2u: | |
21988 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
21989 | i += 2; | |
21990 | break; | |
21991 | ||
21992 | case DW_OP_const2s: | |
21993 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
21994 | i += 2; | |
21995 | break; | |
d53d4ac5 | 21996 | |
21ae7a4d JK |
21997 | case DW_OP_const4u: |
21998 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
21999 | i += 4; | |
22000 | break; | |
22001 | ||
22002 | case DW_OP_const4s: | |
22003 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22004 | i += 4; | |
22005 | break; | |
22006 | ||
585861ea JK |
22007 | case DW_OP_const8u: |
22008 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22009 | i += 8; | |
22010 | break; | |
22011 | ||
21ae7a4d JK |
22012 | case DW_OP_constu: |
22013 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22014 | &bytes_read); | |
22015 | i += bytes_read; | |
22016 | break; | |
22017 | ||
22018 | case DW_OP_consts: | |
22019 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22020 | i += bytes_read; | |
22021 | break; | |
22022 | ||
22023 | case DW_OP_dup: | |
22024 | stack[stacki + 1] = stack[stacki]; | |
22025 | stacki++; | |
22026 | break; | |
22027 | ||
22028 | case DW_OP_plus: | |
22029 | stack[stacki - 1] += stack[stacki]; | |
22030 | stacki--; | |
22031 | break; | |
22032 | ||
22033 | case DW_OP_plus_uconst: | |
22034 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22035 | &bytes_read); | |
22036 | i += bytes_read; | |
22037 | break; | |
22038 | ||
22039 | case DW_OP_minus: | |
22040 | stack[stacki - 1] -= stack[stacki]; | |
22041 | stacki--; | |
22042 | break; | |
22043 | ||
22044 | case DW_OP_deref: | |
22045 | /* If we're not the last op, then we definitely can't encode | |
22046 | this using GDB's address_class enum. This is valid for partial | |
22047 | global symbols, although the variable's address will be bogus | |
22048 | in the psymtab. */ | |
22049 | if (i < size) | |
22050 | dwarf2_complex_location_expr_complaint (); | |
22051 | break; | |
22052 | ||
22053 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22054 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22055 | /* The top of the stack has the offset from the beginning |
22056 | of the thread control block at which the variable is located. */ | |
22057 | /* Nothing should follow this operator, so the top of stack would | |
22058 | be returned. */ | |
22059 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
22060 | address will be bogus in the psymtab. Make it always at least |
22061 | non-zero to not look as a variable garbage collected by linker | |
22062 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
22063 | if (i < size) |
22064 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 22065 | stack[stacki]++; |
21ae7a4d JK |
22066 | break; |
22067 | ||
22068 | case DW_OP_GNU_uninit: | |
22069 | break; | |
22070 | ||
3019eac3 | 22071 | case DW_OP_GNU_addr_index: |
49f6c839 | 22072 | case DW_OP_GNU_const_index: |
3019eac3 DE |
22073 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
22074 | &bytes_read); | |
22075 | i += bytes_read; | |
22076 | break; | |
22077 | ||
21ae7a4d JK |
22078 | default: |
22079 | { | |
f39c6ffd | 22080 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
22081 | |
22082 | if (name) | |
22083 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
22084 | name); | |
22085 | else | |
22086 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
22087 | op); | |
22088 | } | |
22089 | ||
22090 | return (stack[stacki]); | |
d53d4ac5 | 22091 | } |
3c6e0cb3 | 22092 | |
21ae7a4d JK |
22093 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
22094 | outside of the allocated space. Also enforce minimum>0. */ | |
22095 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
22096 | { | |
22097 | complaint (&symfile_complaints, | |
22098 | _("location description stack overflow")); | |
22099 | return 0; | |
22100 | } | |
22101 | ||
22102 | if (stacki <= 0) | |
22103 | { | |
22104 | complaint (&symfile_complaints, | |
22105 | _("location description stack underflow")); | |
22106 | return 0; | |
22107 | } | |
22108 | } | |
22109 | return (stack[stacki]); | |
c906108c SS |
22110 | } |
22111 | ||
22112 | /* memory allocation interface */ | |
22113 | ||
c906108c | 22114 | static struct dwarf_block * |
7b5a2f43 | 22115 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 22116 | { |
8d749320 | 22117 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
22118 | } |
22119 | ||
c906108c | 22120 | static struct die_info * |
b60c80d6 | 22121 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
22122 | { |
22123 | struct die_info *die; | |
b60c80d6 DJ |
22124 | size_t size = sizeof (struct die_info); |
22125 | ||
22126 | if (num_attrs > 1) | |
22127 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 22128 | |
b60c80d6 | 22129 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
22130 | memset (die, 0, sizeof (struct die_info)); |
22131 | return (die); | |
22132 | } | |
2e276125 JB |
22133 | |
22134 | \f | |
22135 | /* Macro support. */ | |
22136 | ||
233d95b5 JK |
22137 | /* Return file name relative to the compilation directory of file number I in |
22138 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 22139 | responsible for freeing it. */ |
233d95b5 | 22140 | |
2e276125 | 22141 | static char * |
233d95b5 | 22142 | file_file_name (int file, struct line_header *lh) |
2e276125 | 22143 | { |
6a83a1e6 EZ |
22144 | /* Is the file number a valid index into the line header's file name |
22145 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22146 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 22147 | { |
8c43009f | 22148 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 22149 | |
8c43009f PA |
22150 | if (!IS_ABSOLUTE_PATH (fe.name)) |
22151 | { | |
22152 | const char *dir = fe.include_dir (lh); | |
22153 | if (dir != NULL) | |
22154 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
22155 | } | |
22156 | return xstrdup (fe.name); | |
6a83a1e6 | 22157 | } |
2e276125 JB |
22158 | else |
22159 | { | |
6a83a1e6 EZ |
22160 | /* The compiler produced a bogus file number. We can at least |
22161 | record the macro definitions made in the file, even if we | |
22162 | won't be able to find the file by name. */ | |
22163 | char fake_name[80]; | |
9a619af0 | 22164 | |
8c042590 PM |
22165 | xsnprintf (fake_name, sizeof (fake_name), |
22166 | "<bad macro file number %d>", file); | |
2e276125 | 22167 | |
6e70227d | 22168 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
22169 | _("bad file number in macro information (%d)"), |
22170 | file); | |
2e276125 | 22171 | |
6a83a1e6 | 22172 | return xstrdup (fake_name); |
2e276125 JB |
22173 | } |
22174 | } | |
22175 | ||
233d95b5 JK |
22176 | /* Return the full name of file number I in *LH's file name table. |
22177 | Use COMP_DIR as the name of the current directory of the | |
22178 | compilation. The result is allocated using xmalloc; the caller is | |
22179 | responsible for freeing it. */ | |
22180 | static char * | |
22181 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
22182 | { | |
22183 | /* Is the file number a valid index into the line header's file name | |
22184 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 22185 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
22186 | { |
22187 | char *relative = file_file_name (file, lh); | |
22188 | ||
22189 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
22190 | return relative; | |
b36cec19 PA |
22191 | return reconcat (relative, comp_dir, SLASH_STRING, |
22192 | relative, (char *) NULL); | |
233d95b5 JK |
22193 | } |
22194 | else | |
22195 | return file_file_name (file, lh); | |
22196 | } | |
22197 | ||
2e276125 JB |
22198 | |
22199 | static struct macro_source_file * | |
22200 | macro_start_file (int file, int line, | |
22201 | struct macro_source_file *current_file, | |
43f3e411 | 22202 | struct line_header *lh) |
2e276125 | 22203 | { |
233d95b5 JK |
22204 | /* File name relative to the compilation directory of this source file. */ |
22205 | char *file_name = file_file_name (file, lh); | |
2e276125 | 22206 | |
2e276125 | 22207 | if (! current_file) |
abc9d0dc | 22208 | { |
fc474241 DE |
22209 | /* Note: We don't create a macro table for this compilation unit |
22210 | at all until we actually get a filename. */ | |
43f3e411 | 22211 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 22212 | |
abc9d0dc TT |
22213 | /* If we have no current file, then this must be the start_file |
22214 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
22215 | current_file = macro_set_main (macro_table, file_name); |
22216 | macro_define_special (macro_table); | |
abc9d0dc | 22217 | } |
2e276125 | 22218 | else |
233d95b5 | 22219 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 22220 | |
233d95b5 | 22221 | xfree (file_name); |
6e70227d | 22222 | |
2e276125 JB |
22223 | return current_file; |
22224 | } | |
22225 | ||
2e276125 JB |
22226 | static const char * |
22227 | consume_improper_spaces (const char *p, const char *body) | |
22228 | { | |
22229 | if (*p == ' ') | |
22230 | { | |
4d3c2250 | 22231 | complaint (&symfile_complaints, |
3e43a32a MS |
22232 | _("macro definition contains spaces " |
22233 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 22234 | body); |
2e276125 JB |
22235 | |
22236 | while (*p == ' ') | |
22237 | p++; | |
22238 | } | |
22239 | ||
22240 | return p; | |
22241 | } | |
22242 | ||
22243 | ||
22244 | static void | |
22245 | parse_macro_definition (struct macro_source_file *file, int line, | |
22246 | const char *body) | |
22247 | { | |
22248 | const char *p; | |
22249 | ||
22250 | /* The body string takes one of two forms. For object-like macro | |
22251 | definitions, it should be: | |
22252 | ||
22253 | <macro name> " " <definition> | |
22254 | ||
22255 | For function-like macro definitions, it should be: | |
22256 | ||
22257 | <macro name> "() " <definition> | |
22258 | or | |
22259 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
22260 | ||
22261 | Spaces may appear only where explicitly indicated, and in the | |
22262 | <definition>. | |
22263 | ||
22264 | The Dwarf 2 spec says that an object-like macro's name is always | |
22265 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 22266 | the space when the macro's definition is the empty string. |
2e276125 JB |
22267 | |
22268 | The Dwarf 2 spec says that there should be no spaces between the | |
22269 | formal arguments in a function-like macro's formal argument list, | |
22270 | but versions of GCC around March 2002 include spaces after the | |
22271 | commas. */ | |
22272 | ||
22273 | ||
22274 | /* Find the extent of the macro name. The macro name is terminated | |
22275 | by either a space or null character (for an object-like macro) or | |
22276 | an opening paren (for a function-like macro). */ | |
22277 | for (p = body; *p; p++) | |
22278 | if (*p == ' ' || *p == '(') | |
22279 | break; | |
22280 | ||
22281 | if (*p == ' ' || *p == '\0') | |
22282 | { | |
22283 | /* It's an object-like macro. */ | |
22284 | int name_len = p - body; | |
3f8a7804 | 22285 | char *name = savestring (body, name_len); |
2e276125 JB |
22286 | const char *replacement; |
22287 | ||
22288 | if (*p == ' ') | |
22289 | replacement = body + name_len + 1; | |
22290 | else | |
22291 | { | |
4d3c2250 | 22292 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22293 | replacement = body + name_len; |
22294 | } | |
6e70227d | 22295 | |
2e276125 JB |
22296 | macro_define_object (file, line, name, replacement); |
22297 | ||
22298 | xfree (name); | |
22299 | } | |
22300 | else if (*p == '(') | |
22301 | { | |
22302 | /* It's a function-like macro. */ | |
3f8a7804 | 22303 | char *name = savestring (body, p - body); |
2e276125 JB |
22304 | int argc = 0; |
22305 | int argv_size = 1; | |
8d749320 | 22306 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
22307 | |
22308 | p++; | |
22309 | ||
22310 | p = consume_improper_spaces (p, body); | |
22311 | ||
22312 | /* Parse the formal argument list. */ | |
22313 | while (*p && *p != ')') | |
22314 | { | |
22315 | /* Find the extent of the current argument name. */ | |
22316 | const char *arg_start = p; | |
22317 | ||
22318 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
22319 | p++; | |
22320 | ||
22321 | if (! *p || p == arg_start) | |
4d3c2250 | 22322 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22323 | else |
22324 | { | |
22325 | /* Make sure argv has room for the new argument. */ | |
22326 | if (argc >= argv_size) | |
22327 | { | |
22328 | argv_size *= 2; | |
224c3ddb | 22329 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
22330 | } |
22331 | ||
3f8a7804 | 22332 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
22333 | } |
22334 | ||
22335 | p = consume_improper_spaces (p, body); | |
22336 | ||
22337 | /* Consume the comma, if present. */ | |
22338 | if (*p == ',') | |
22339 | { | |
22340 | p++; | |
22341 | ||
22342 | p = consume_improper_spaces (p, body); | |
22343 | } | |
22344 | } | |
22345 | ||
22346 | if (*p == ')') | |
22347 | { | |
22348 | p++; | |
22349 | ||
22350 | if (*p == ' ') | |
22351 | /* Perfectly formed definition, no complaints. */ | |
22352 | macro_define_function (file, line, name, | |
6e70227d | 22353 | argc, (const char **) argv, |
2e276125 JB |
22354 | p + 1); |
22355 | else if (*p == '\0') | |
22356 | { | |
22357 | /* Complain, but do define it. */ | |
4d3c2250 | 22358 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 22359 | macro_define_function (file, line, name, |
6e70227d | 22360 | argc, (const char **) argv, |
2e276125 JB |
22361 | p); |
22362 | } | |
22363 | else | |
22364 | /* Just complain. */ | |
4d3c2250 | 22365 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22366 | } |
22367 | else | |
22368 | /* Just complain. */ | |
4d3c2250 | 22369 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22370 | |
22371 | xfree (name); | |
22372 | { | |
22373 | int i; | |
22374 | ||
22375 | for (i = 0; i < argc; i++) | |
22376 | xfree (argv[i]); | |
22377 | } | |
22378 | xfree (argv); | |
22379 | } | |
22380 | else | |
4d3c2250 | 22381 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
22382 | } |
22383 | ||
cf2c3c16 TT |
22384 | /* Skip some bytes from BYTES according to the form given in FORM. |
22385 | Returns the new pointer. */ | |
2e276125 | 22386 | |
d521ce57 TT |
22387 | static const gdb_byte * |
22388 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
22389 | enum dwarf_form form, |
22390 | unsigned int offset_size, | |
22391 | struct dwarf2_section_info *section) | |
2e276125 | 22392 | { |
cf2c3c16 | 22393 | unsigned int bytes_read; |
2e276125 | 22394 | |
cf2c3c16 | 22395 | switch (form) |
2e276125 | 22396 | { |
cf2c3c16 TT |
22397 | case DW_FORM_data1: |
22398 | case DW_FORM_flag: | |
22399 | ++bytes; | |
22400 | break; | |
22401 | ||
22402 | case DW_FORM_data2: | |
22403 | bytes += 2; | |
22404 | break; | |
22405 | ||
22406 | case DW_FORM_data4: | |
22407 | bytes += 4; | |
22408 | break; | |
22409 | ||
22410 | case DW_FORM_data8: | |
22411 | bytes += 8; | |
22412 | break; | |
22413 | ||
0224619f JK |
22414 | case DW_FORM_data16: |
22415 | bytes += 16; | |
22416 | break; | |
22417 | ||
cf2c3c16 TT |
22418 | case DW_FORM_string: |
22419 | read_direct_string (abfd, bytes, &bytes_read); | |
22420 | bytes += bytes_read; | |
22421 | break; | |
22422 | ||
22423 | case DW_FORM_sec_offset: | |
22424 | case DW_FORM_strp: | |
36586728 | 22425 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
22426 | bytes += offset_size; |
22427 | break; | |
22428 | ||
22429 | case DW_FORM_block: | |
22430 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
22431 | bytes += bytes_read; | |
22432 | break; | |
22433 | ||
22434 | case DW_FORM_block1: | |
22435 | bytes += 1 + read_1_byte (abfd, bytes); | |
22436 | break; | |
22437 | case DW_FORM_block2: | |
22438 | bytes += 2 + read_2_bytes (abfd, bytes); | |
22439 | break; | |
22440 | case DW_FORM_block4: | |
22441 | bytes += 4 + read_4_bytes (abfd, bytes); | |
22442 | break; | |
22443 | ||
22444 | case DW_FORM_sdata: | |
22445 | case DW_FORM_udata: | |
3019eac3 DE |
22446 | case DW_FORM_GNU_addr_index: |
22447 | case DW_FORM_GNU_str_index: | |
d521ce57 | 22448 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
22449 | if (bytes == NULL) |
22450 | { | |
22451 | dwarf2_section_buffer_overflow_complaint (section); | |
22452 | return NULL; | |
22453 | } | |
cf2c3c16 TT |
22454 | break; |
22455 | ||
663c44ac JK |
22456 | case DW_FORM_implicit_const: |
22457 | break; | |
22458 | ||
cf2c3c16 TT |
22459 | default: |
22460 | { | |
22461 | complain: | |
22462 | complaint (&symfile_complaints, | |
22463 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 22464 | form, get_section_name (section)); |
cf2c3c16 TT |
22465 | return NULL; |
22466 | } | |
2e276125 JB |
22467 | } |
22468 | ||
cf2c3c16 TT |
22469 | return bytes; |
22470 | } | |
757a13d0 | 22471 | |
cf2c3c16 TT |
22472 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
22473 | opcode. Returns an updated pointer to the macro data buffer; or, | |
22474 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 22475 | |
d521ce57 | 22476 | static const gdb_byte * |
cf2c3c16 | 22477 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
22478 | const gdb_byte **opcode_definitions, |
22479 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
22480 | bfd *abfd, |
22481 | unsigned int offset_size, | |
22482 | struct dwarf2_section_info *section) | |
22483 | { | |
22484 | unsigned int bytes_read, i; | |
22485 | unsigned long arg; | |
d521ce57 | 22486 | const gdb_byte *defn; |
2e276125 | 22487 | |
cf2c3c16 | 22488 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 22489 | { |
cf2c3c16 TT |
22490 | complaint (&symfile_complaints, |
22491 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
22492 | opcode); | |
22493 | return NULL; | |
22494 | } | |
2e276125 | 22495 | |
cf2c3c16 TT |
22496 | defn = opcode_definitions[opcode]; |
22497 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
22498 | defn += bytes_read; | |
2e276125 | 22499 | |
cf2c3c16 TT |
22500 | for (i = 0; i < arg; ++i) |
22501 | { | |
aead7601 SM |
22502 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
22503 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 22504 | section); |
cf2c3c16 TT |
22505 | if (mac_ptr == NULL) |
22506 | { | |
22507 | /* skip_form_bytes already issued the complaint. */ | |
22508 | return NULL; | |
22509 | } | |
22510 | } | |
757a13d0 | 22511 | |
cf2c3c16 TT |
22512 | return mac_ptr; |
22513 | } | |
757a13d0 | 22514 | |
cf2c3c16 TT |
22515 | /* A helper function which parses the header of a macro section. |
22516 | If the macro section is the extended (for now called "GNU") type, | |
22517 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
22518 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 22519 | |
d521ce57 TT |
22520 | static const gdb_byte * |
22521 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 22522 | bfd *abfd, |
d521ce57 | 22523 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
22524 | unsigned int *offset_size, |
22525 | int section_is_gnu) | |
22526 | { | |
22527 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 22528 | |
cf2c3c16 TT |
22529 | if (section_is_gnu) |
22530 | { | |
22531 | unsigned int version, flags; | |
757a13d0 | 22532 | |
cf2c3c16 | 22533 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 22534 | if (version != 4 && version != 5) |
cf2c3c16 TT |
22535 | { |
22536 | complaint (&symfile_complaints, | |
22537 | _("unrecognized version `%d' in .debug_macro section"), | |
22538 | version); | |
22539 | return NULL; | |
22540 | } | |
22541 | mac_ptr += 2; | |
757a13d0 | 22542 | |
cf2c3c16 TT |
22543 | flags = read_1_byte (abfd, mac_ptr); |
22544 | ++mac_ptr; | |
22545 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 22546 | |
cf2c3c16 TT |
22547 | if ((flags & 2) != 0) |
22548 | /* We don't need the line table offset. */ | |
22549 | mac_ptr += *offset_size; | |
757a13d0 | 22550 | |
cf2c3c16 TT |
22551 | /* Vendor opcode descriptions. */ |
22552 | if ((flags & 4) != 0) | |
22553 | { | |
22554 | unsigned int i, count; | |
757a13d0 | 22555 | |
cf2c3c16 TT |
22556 | count = read_1_byte (abfd, mac_ptr); |
22557 | ++mac_ptr; | |
22558 | for (i = 0; i < count; ++i) | |
22559 | { | |
22560 | unsigned int opcode, bytes_read; | |
22561 | unsigned long arg; | |
22562 | ||
22563 | opcode = read_1_byte (abfd, mac_ptr); | |
22564 | ++mac_ptr; | |
22565 | opcode_definitions[opcode] = mac_ptr; | |
22566 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22567 | mac_ptr += bytes_read; | |
22568 | mac_ptr += arg; | |
22569 | } | |
757a13d0 | 22570 | } |
cf2c3c16 | 22571 | } |
757a13d0 | 22572 | |
cf2c3c16 TT |
22573 | return mac_ptr; |
22574 | } | |
757a13d0 | 22575 | |
cf2c3c16 | 22576 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 22577 | including DW_MACRO_import. */ |
cf2c3c16 TT |
22578 | |
22579 | static void | |
d521ce57 TT |
22580 | dwarf_decode_macro_bytes (bfd *abfd, |
22581 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 22582 | struct macro_source_file *current_file, |
43f3e411 | 22583 | struct line_header *lh, |
cf2c3c16 | 22584 | struct dwarf2_section_info *section, |
36586728 | 22585 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 22586 | unsigned int offset_size, |
8fc3fc34 | 22587 | htab_t include_hash) |
cf2c3c16 | 22588 | { |
4d663531 | 22589 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22590 | enum dwarf_macro_record_type macinfo_type; |
22591 | int at_commandline; | |
d521ce57 | 22592 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22593 | |
cf2c3c16 TT |
22594 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22595 | &offset_size, section_is_gnu); | |
22596 | if (mac_ptr == NULL) | |
22597 | { | |
22598 | /* We already issued a complaint. */ | |
22599 | return; | |
22600 | } | |
757a13d0 JK |
22601 | |
22602 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22603 | GDB is still reading the definitions from command line. First | |
22604 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22605 | to create CURRENT_FILE for the main source holding also the command line | |
22606 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22607 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22608 | ||
22609 | at_commandline = 1; | |
22610 | ||
22611 | do | |
22612 | { | |
22613 | /* Do we at least have room for a macinfo type byte? */ | |
22614 | if (mac_ptr >= mac_end) | |
22615 | { | |
f664829e | 22616 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22617 | break; |
22618 | } | |
22619 | ||
aead7601 | 22620 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22621 | mac_ptr++; |
22622 | ||
cf2c3c16 TT |
22623 | /* Note that we rely on the fact that the corresponding GNU and |
22624 | DWARF constants are the same. */ | |
757a13d0 JK |
22625 | switch (macinfo_type) |
22626 | { | |
22627 | /* A zero macinfo type indicates the end of the macro | |
22628 | information. */ | |
22629 | case 0: | |
22630 | break; | |
2e276125 | 22631 | |
0af92d60 JK |
22632 | case DW_MACRO_define: |
22633 | case DW_MACRO_undef: | |
22634 | case DW_MACRO_define_strp: | |
22635 | case DW_MACRO_undef_strp: | |
22636 | case DW_MACRO_define_sup: | |
22637 | case DW_MACRO_undef_sup: | |
2e276125 | 22638 | { |
891d2f0b | 22639 | unsigned int bytes_read; |
2e276125 | 22640 | int line; |
d521ce57 | 22641 | const char *body; |
cf2c3c16 | 22642 | int is_define; |
2e276125 | 22643 | |
cf2c3c16 TT |
22644 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22645 | mac_ptr += bytes_read; | |
22646 | ||
0af92d60 JK |
22647 | if (macinfo_type == DW_MACRO_define |
22648 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22649 | { |
22650 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22651 | mac_ptr += bytes_read; | |
22652 | } | |
22653 | else | |
22654 | { | |
22655 | LONGEST str_offset; | |
22656 | ||
22657 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22658 | mac_ptr += offset_size; | |
2e276125 | 22659 | |
0af92d60 JK |
22660 | if (macinfo_type == DW_MACRO_define_sup |
22661 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22662 | || section_is_dwz) |
36586728 TT |
22663 | { |
22664 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22665 | ||
22666 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
22667 | } | |
22668 | else | |
22669 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
22670 | } |
22671 | ||
0af92d60 JK |
22672 | is_define = (macinfo_type == DW_MACRO_define |
22673 | || macinfo_type == DW_MACRO_define_strp | |
22674 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 22675 | if (! current_file) |
757a13d0 JK |
22676 | { |
22677 | /* DWARF violation as no main source is present. */ | |
22678 | complaint (&symfile_complaints, | |
22679 | _("debug info with no main source gives macro %s " | |
22680 | "on line %d: %s"), | |
cf2c3c16 TT |
22681 | is_define ? _("definition") : _("undefinition"), |
22682 | line, body); | |
757a13d0 JK |
22683 | break; |
22684 | } | |
3e43a32a MS |
22685 | if ((line == 0 && !at_commandline) |
22686 | || (line != 0 && at_commandline)) | |
4d3c2250 | 22687 | complaint (&symfile_complaints, |
757a13d0 JK |
22688 | _("debug info gives %s macro %s with %s line %d: %s"), |
22689 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 22690 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
22691 | line == 0 ? _("zero") : _("non-zero"), line, body); |
22692 | ||
cf2c3c16 | 22693 | if (is_define) |
757a13d0 | 22694 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
22695 | else |
22696 | { | |
0af92d60 JK |
22697 | gdb_assert (macinfo_type == DW_MACRO_undef |
22698 | || macinfo_type == DW_MACRO_undef_strp | |
22699 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
22700 | macro_undef (current_file, line, body); |
22701 | } | |
2e276125 JB |
22702 | } |
22703 | break; | |
22704 | ||
0af92d60 | 22705 | case DW_MACRO_start_file: |
2e276125 | 22706 | { |
891d2f0b | 22707 | unsigned int bytes_read; |
2e276125 JB |
22708 | int line, file; |
22709 | ||
22710 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22711 | mac_ptr += bytes_read; | |
22712 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22713 | mac_ptr += bytes_read; | |
22714 | ||
3e43a32a MS |
22715 | if ((line == 0 && !at_commandline) |
22716 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
22717 | complaint (&symfile_complaints, |
22718 | _("debug info gives source %d included " | |
22719 | "from %s at %s line %d"), | |
22720 | file, at_commandline ? _("command-line") : _("file"), | |
22721 | line == 0 ? _("zero") : _("non-zero"), line); | |
22722 | ||
22723 | if (at_commandline) | |
22724 | { | |
0af92d60 | 22725 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 22726 | pass one. */ |
757a13d0 JK |
22727 | at_commandline = 0; |
22728 | } | |
22729 | else | |
43f3e411 | 22730 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
22731 | } |
22732 | break; | |
22733 | ||
0af92d60 | 22734 | case DW_MACRO_end_file: |
2e276125 | 22735 | if (! current_file) |
4d3c2250 | 22736 | complaint (&symfile_complaints, |
3e43a32a MS |
22737 | _("macro debug info has an unmatched " |
22738 | "`close_file' directive")); | |
2e276125 JB |
22739 | else |
22740 | { | |
22741 | current_file = current_file->included_by; | |
22742 | if (! current_file) | |
22743 | { | |
cf2c3c16 | 22744 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
22745 | |
22746 | /* GCC circa March 2002 doesn't produce the zero | |
22747 | type byte marking the end of the compilation | |
22748 | unit. Complain if it's not there, but exit no | |
22749 | matter what. */ | |
22750 | ||
22751 | /* Do we at least have room for a macinfo type byte? */ | |
22752 | if (mac_ptr >= mac_end) | |
22753 | { | |
f664829e | 22754 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
22755 | return; |
22756 | } | |
22757 | ||
22758 | /* We don't increment mac_ptr here, so this is just | |
22759 | a look-ahead. */ | |
aead7601 SM |
22760 | next_type |
22761 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
22762 | mac_ptr); | |
2e276125 | 22763 | if (next_type != 0) |
4d3c2250 | 22764 | complaint (&symfile_complaints, |
3e43a32a MS |
22765 | _("no terminating 0-type entry for " |
22766 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
22767 | |
22768 | return; | |
22769 | } | |
22770 | } | |
22771 | break; | |
22772 | ||
0af92d60 JK |
22773 | case DW_MACRO_import: |
22774 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
22775 | { |
22776 | LONGEST offset; | |
8fc3fc34 | 22777 | void **slot; |
a036ba48 TT |
22778 | bfd *include_bfd = abfd; |
22779 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 22780 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 22781 | int is_dwz = section_is_dwz; |
d521ce57 | 22782 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
22783 | |
22784 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22785 | mac_ptr += offset_size; | |
22786 | ||
0af92d60 | 22787 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
22788 | { |
22789 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22790 | ||
4d663531 | 22791 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 22792 | |
a036ba48 | 22793 | include_section = &dwz->macro; |
a32a8923 | 22794 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
22795 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
22796 | is_dwz = 1; | |
22797 | } | |
22798 | ||
22799 | new_mac_ptr = include_section->buffer + offset; | |
22800 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
22801 | ||
8fc3fc34 TT |
22802 | if (*slot != NULL) |
22803 | { | |
22804 | /* This has actually happened; see | |
22805 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
22806 | complaint (&symfile_complaints, | |
0af92d60 | 22807 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
22808 | ".debug_macro section")); |
22809 | } | |
22810 | else | |
22811 | { | |
d521ce57 | 22812 | *slot = (void *) new_mac_ptr; |
36586728 | 22813 | |
a036ba48 | 22814 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 22815 | include_mac_end, current_file, lh, |
36586728 | 22816 | section, section_is_gnu, is_dwz, |
4d663531 | 22817 | offset_size, include_hash); |
8fc3fc34 | 22818 | |
d521ce57 | 22819 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 22820 | } |
cf2c3c16 TT |
22821 | } |
22822 | break; | |
22823 | ||
2e276125 | 22824 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
22825 | if (!section_is_gnu) |
22826 | { | |
22827 | unsigned int bytes_read; | |
2e276125 | 22828 | |
ac298888 TT |
22829 | /* This reads the constant, but since we don't recognize |
22830 | any vendor extensions, we ignore it. */ | |
22831 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
22832 | mac_ptr += bytes_read; |
22833 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22834 | mac_ptr += bytes_read; | |
2e276125 | 22835 | |
cf2c3c16 TT |
22836 | /* We don't recognize any vendor extensions. */ |
22837 | break; | |
22838 | } | |
22839 | /* FALLTHROUGH */ | |
22840 | ||
22841 | default: | |
22842 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22843 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22844 | section); |
22845 | if (mac_ptr == NULL) | |
22846 | return; | |
22847 | break; | |
2e276125 | 22848 | } |
757a13d0 | 22849 | } while (macinfo_type != 0); |
2e276125 | 22850 | } |
8e19ed76 | 22851 | |
cf2c3c16 | 22852 | static void |
09262596 | 22853 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 22854 | int section_is_gnu) |
cf2c3c16 | 22855 | { |
bb5ed363 | 22856 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
22857 | struct line_header *lh = cu->line_header; |
22858 | bfd *abfd; | |
d521ce57 | 22859 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
22860 | struct macro_source_file *current_file = 0; |
22861 | enum dwarf_macro_record_type macinfo_type; | |
22862 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 22863 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 22864 | void **slot; |
09262596 DE |
22865 | struct dwarf2_section_info *section; |
22866 | const char *section_name; | |
22867 | ||
22868 | if (cu->dwo_unit != NULL) | |
22869 | { | |
22870 | if (section_is_gnu) | |
22871 | { | |
22872 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
22873 | section_name = ".debug_macro.dwo"; | |
22874 | } | |
22875 | else | |
22876 | { | |
22877 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
22878 | section_name = ".debug_macinfo.dwo"; | |
22879 | } | |
22880 | } | |
22881 | else | |
22882 | { | |
22883 | if (section_is_gnu) | |
22884 | { | |
22885 | section = &dwarf2_per_objfile->macro; | |
22886 | section_name = ".debug_macro"; | |
22887 | } | |
22888 | else | |
22889 | { | |
22890 | section = &dwarf2_per_objfile->macinfo; | |
22891 | section_name = ".debug_macinfo"; | |
22892 | } | |
22893 | } | |
cf2c3c16 | 22894 | |
bb5ed363 | 22895 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
22896 | if (section->buffer == NULL) |
22897 | { | |
fceca515 | 22898 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
22899 | return; |
22900 | } | |
a32a8923 | 22901 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
22902 | |
22903 | /* First pass: Find the name of the base filename. | |
22904 | This filename is needed in order to process all macros whose definition | |
22905 | (or undefinition) comes from the command line. These macros are defined | |
22906 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
22907 | associated to the base file. | |
22908 | ||
22909 | To determine the base file name, we scan the macro definitions until we | |
22910 | reach the first DW_MACINFO_start_file entry. We then initialize | |
22911 | CURRENT_FILE accordingly so that any macro definition found before the | |
22912 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
22913 | ||
22914 | mac_ptr = section->buffer + offset; | |
22915 | mac_end = section->buffer + section->size; | |
22916 | ||
22917 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
22918 | &offset_size, section_is_gnu); | |
22919 | if (mac_ptr == NULL) | |
22920 | { | |
22921 | /* We already issued a complaint. */ | |
22922 | return; | |
22923 | } | |
22924 | ||
22925 | do | |
22926 | { | |
22927 | /* Do we at least have room for a macinfo type byte? */ | |
22928 | if (mac_ptr >= mac_end) | |
22929 | { | |
22930 | /* Complaint is printed during the second pass as GDB will probably | |
22931 | stop the first pass earlier upon finding | |
22932 | DW_MACINFO_start_file. */ | |
22933 | break; | |
22934 | } | |
22935 | ||
aead7601 | 22936 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
22937 | mac_ptr++; |
22938 | ||
22939 | /* Note that we rely on the fact that the corresponding GNU and | |
22940 | DWARF constants are the same. */ | |
22941 | switch (macinfo_type) | |
22942 | { | |
22943 | /* A zero macinfo type indicates the end of the macro | |
22944 | information. */ | |
22945 | case 0: | |
22946 | break; | |
22947 | ||
0af92d60 JK |
22948 | case DW_MACRO_define: |
22949 | case DW_MACRO_undef: | |
cf2c3c16 TT |
22950 | /* Only skip the data by MAC_PTR. */ |
22951 | { | |
22952 | unsigned int bytes_read; | |
22953 | ||
22954 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22955 | mac_ptr += bytes_read; | |
22956 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22957 | mac_ptr += bytes_read; | |
22958 | } | |
22959 | break; | |
22960 | ||
0af92d60 | 22961 | case DW_MACRO_start_file: |
cf2c3c16 TT |
22962 | { |
22963 | unsigned int bytes_read; | |
22964 | int line, file; | |
22965 | ||
22966 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22967 | mac_ptr += bytes_read; | |
22968 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22969 | mac_ptr += bytes_read; | |
22970 | ||
43f3e411 | 22971 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
22972 | } |
22973 | break; | |
22974 | ||
0af92d60 | 22975 | case DW_MACRO_end_file: |
cf2c3c16 TT |
22976 | /* No data to skip by MAC_PTR. */ |
22977 | break; | |
22978 | ||
0af92d60 JK |
22979 | case DW_MACRO_define_strp: |
22980 | case DW_MACRO_undef_strp: | |
22981 | case DW_MACRO_define_sup: | |
22982 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
22983 | { |
22984 | unsigned int bytes_read; | |
22985 | ||
22986 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22987 | mac_ptr += bytes_read; | |
22988 | mac_ptr += offset_size; | |
22989 | } | |
22990 | break; | |
22991 | ||
0af92d60 JK |
22992 | case DW_MACRO_import: |
22993 | case DW_MACRO_import_sup: | |
cf2c3c16 | 22994 | /* Note that, according to the spec, a transparent include |
0af92d60 | 22995 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
22996 | skip this opcode. */ |
22997 | mac_ptr += offset_size; | |
22998 | break; | |
22999 | ||
23000 | case DW_MACINFO_vendor_ext: | |
23001 | /* Only skip the data by MAC_PTR. */ | |
23002 | if (!section_is_gnu) | |
23003 | { | |
23004 | unsigned int bytes_read; | |
23005 | ||
23006 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23007 | mac_ptr += bytes_read; | |
23008 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23009 | mac_ptr += bytes_read; | |
23010 | } | |
23011 | /* FALLTHROUGH */ | |
23012 | ||
23013 | default: | |
23014 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23015 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23016 | section); |
23017 | if (mac_ptr == NULL) | |
23018 | return; | |
23019 | break; | |
23020 | } | |
23021 | } while (macinfo_type != 0 && current_file == NULL); | |
23022 | ||
23023 | /* Second pass: Process all entries. | |
23024 | ||
23025 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
23026 | command-line macro definitions/undefinitions. This flag is unset when we | |
23027 | reach the first DW_MACINFO_start_file entry. */ | |
23028 | ||
fc4007c9 TT |
23029 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
23030 | htab_eq_pointer, | |
23031 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 23032 | mac_ptr = section->buffer + offset; |
fc4007c9 | 23033 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 23034 | *slot = (void *) mac_ptr; |
8fc3fc34 | 23035 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 23036 | current_file, lh, section, |
fc4007c9 TT |
23037 | section_is_gnu, 0, offset_size, |
23038 | include_hash.get ()); | |
cf2c3c16 TT |
23039 | } |
23040 | ||
8e19ed76 | 23041 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 23042 | if so return true else false. */ |
380bca97 | 23043 | |
8e19ed76 | 23044 | static int |
6e5a29e1 | 23045 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
23046 | { |
23047 | return (attr == NULL ? 0 : | |
23048 | attr->form == DW_FORM_block1 | |
23049 | || attr->form == DW_FORM_block2 | |
23050 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
23051 | || attr->form == DW_FORM_block |
23052 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 23053 | } |
4c2df51b | 23054 | |
c6a0999f JB |
23055 | /* Return non-zero if ATTR's value is a section offset --- classes |
23056 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
23057 | You may use DW_UNSND (attr) to retrieve such offsets. | |
23058 | ||
23059 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
23060 | may have a value that belongs to more than one of these classes; it | |
23061 | would be ambiguous if we did, because we use the same forms for all | |
23062 | of them. */ | |
380bca97 | 23063 | |
3690dd37 | 23064 | static int |
6e5a29e1 | 23065 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
23066 | { |
23067 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
23068 | || attr->form == DW_FORM_data8 |
23069 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
23070 | } |
23071 | ||
3690dd37 JB |
23072 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
23073 | zero otherwise. When this function returns true, you can apply | |
23074 | dwarf2_get_attr_constant_value to it. | |
23075 | ||
23076 | However, note that for some attributes you must check | |
23077 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
23078 | and DW_FORM_data8 are members of both the constant class, and of | |
23079 | the classes that contain offsets into other debug sections | |
23080 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
23081 | that, if an attribute's can be either a constant or one of the | |
23082 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
23083 | taken as section offsets, not constants. |
23084 | ||
23085 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
23086 | cannot handle that. */ | |
380bca97 | 23087 | |
3690dd37 | 23088 | static int |
6e5a29e1 | 23089 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
23090 | { |
23091 | switch (attr->form) | |
23092 | { | |
23093 | case DW_FORM_sdata: | |
23094 | case DW_FORM_udata: | |
23095 | case DW_FORM_data1: | |
23096 | case DW_FORM_data2: | |
23097 | case DW_FORM_data4: | |
23098 | case DW_FORM_data8: | |
663c44ac | 23099 | case DW_FORM_implicit_const: |
3690dd37 JB |
23100 | return 1; |
23101 | default: | |
23102 | return 0; | |
23103 | } | |
23104 | } | |
23105 | ||
7771576e SA |
23106 | |
23107 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
23108 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
23109 | ||
23110 | static int | |
6e5a29e1 | 23111 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
23112 | { |
23113 | switch (attr->form) | |
23114 | { | |
23115 | case DW_FORM_ref_addr: | |
23116 | case DW_FORM_ref1: | |
23117 | case DW_FORM_ref2: | |
23118 | case DW_FORM_ref4: | |
23119 | case DW_FORM_ref8: | |
23120 | case DW_FORM_ref_udata: | |
23121 | case DW_FORM_GNU_ref_alt: | |
23122 | return 1; | |
23123 | default: | |
23124 | return 0; | |
23125 | } | |
23126 | } | |
23127 | ||
3019eac3 DE |
23128 | /* Return the .debug_loc section to use for CU. |
23129 | For DWO files use .debug_loc.dwo. */ | |
23130 | ||
23131 | static struct dwarf2_section_info * | |
23132 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23133 | { | |
23134 | if (cu->dwo_unit) | |
43988095 JK |
23135 | { |
23136 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
23137 | ||
23138 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
23139 | } | |
23140 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23141 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23142 | } |
23143 | ||
8cf6f0b1 TT |
23144 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23145 | ||
23146 | static void | |
23147 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23148 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23149 | const struct attribute *attr) |
8cf6f0b1 | 23150 | { |
3019eac3 DE |
23151 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23152 | ||
23153 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
23154 | |
23155 | baton->per_cu = cu->per_cu; | |
23156 | gdb_assert (baton->per_cu); | |
23157 | /* We don't know how long the location list is, but make sure we | |
23158 | don't run off the edge of the section. */ | |
3019eac3 DE |
23159 | baton->size = section->size - DW_UNSND (attr); |
23160 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23161 | baton->base_address = cu->base_address; |
f664829e | 23162 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23163 | } |
23164 | ||
4c2df51b | 23165 | static void |
ff39bb5e | 23166 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23167 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23168 | { |
bb5ed363 | 23169 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23170 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23171 | |
3690dd37 | 23172 | if (attr_form_is_section_offset (attr) |
3019eac3 | 23173 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23174 | the section. If so, fall through to the complaint in the |
23175 | other branch. */ | |
3019eac3 | 23176 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 23177 | { |
0d53c4c4 | 23178 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23179 | |
8d749320 | 23180 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23181 | |
8cf6f0b1 | 23182 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23183 | |
d00adf39 | 23184 | if (cu->base_known == 0) |
0d53c4c4 | 23185 | complaint (&symfile_complaints, |
3e43a32a MS |
23186 | _("Location list used without " |
23187 | "specifying the CU base address.")); | |
4c2df51b | 23188 | |
f1e6e072 TT |
23189 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23190 | ? dwarf2_loclist_block_index | |
23191 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
23192 | SYMBOL_LOCATION_BATON (sym) = baton; |
23193 | } | |
23194 | else | |
23195 | { | |
23196 | struct dwarf2_locexpr_baton *baton; | |
23197 | ||
8d749320 | 23198 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
23199 | baton->per_cu = cu->per_cu; |
23200 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
23201 | |
23202 | if (attr_form_is_block (attr)) | |
23203 | { | |
23204 | /* Note that we're just copying the block's data pointer | |
23205 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
23206 | info_buffer for SYM's objfile; right now we never release |
23207 | that buffer, but when we do clean up properly this may | |
23208 | need to change. */ | |
0d53c4c4 DJ |
23209 | baton->size = DW_BLOCK (attr)->size; |
23210 | baton->data = DW_BLOCK (attr)->data; | |
23211 | } | |
23212 | else | |
23213 | { | |
23214 | dwarf2_invalid_attrib_class_complaint ("location description", | |
23215 | SYMBOL_NATURAL_NAME (sym)); | |
23216 | baton->size = 0; | |
0d53c4c4 | 23217 | } |
6e70227d | 23218 | |
f1e6e072 TT |
23219 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23220 | ? dwarf2_locexpr_block_index | |
23221 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
23222 | SYMBOL_LOCATION_BATON (sym) = baton; |
23223 | } | |
4c2df51b | 23224 | } |
6502dd73 | 23225 | |
9aa1f1e3 TT |
23226 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
23227 | came from a separate debuginfo file, then the master objfile is | |
23228 | returned. */ | |
ae0d2f24 UW |
23229 | |
23230 | struct objfile * | |
23231 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
23232 | { | |
9291a0cd | 23233 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
23234 | |
23235 | /* Return the master objfile, so that we can report and look up the | |
23236 | correct file containing this variable. */ | |
23237 | if (objfile->separate_debug_objfile_backlink) | |
23238 | objfile = objfile->separate_debug_objfile_backlink; | |
23239 | ||
23240 | return objfile; | |
23241 | } | |
23242 | ||
96408a79 SA |
23243 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
23244 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
23245 | CU_HEADERP first. */ | |
23246 | ||
23247 | static const struct comp_unit_head * | |
23248 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
23249 | struct dwarf2_per_cu_data *per_cu) | |
23250 | { | |
d521ce57 | 23251 | const gdb_byte *info_ptr; |
96408a79 SA |
23252 | |
23253 | if (per_cu->cu) | |
23254 | return &per_cu->cu->header; | |
23255 | ||
9c541725 | 23256 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
23257 | |
23258 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
23259 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
23260 | rcuh_kind::COMPILE); | |
96408a79 SA |
23261 | |
23262 | return cu_headerp; | |
23263 | } | |
23264 | ||
ae0d2f24 UW |
23265 | /* Return the address size given in the compilation unit header for CU. */ |
23266 | ||
98714339 | 23267 | int |
ae0d2f24 UW |
23268 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
23269 | { | |
96408a79 SA |
23270 | struct comp_unit_head cu_header_local; |
23271 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 23272 | |
96408a79 SA |
23273 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23274 | ||
23275 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
23276 | } |
23277 | ||
9eae7c52 TT |
23278 | /* Return the offset size given in the compilation unit header for CU. */ |
23279 | ||
23280 | int | |
23281 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
23282 | { | |
96408a79 SA |
23283 | struct comp_unit_head cu_header_local; |
23284 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 23285 | |
96408a79 SA |
23286 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
23287 | ||
23288 | return cu_headerp->offset_size; | |
23289 | } | |
23290 | ||
23291 | /* See its dwarf2loc.h declaration. */ | |
23292 | ||
23293 | int | |
23294 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
23295 | { | |
23296 | struct comp_unit_head cu_header_local; | |
23297 | const struct comp_unit_head *cu_headerp; | |
23298 | ||
23299 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
23300 | ||
23301 | if (cu_headerp->version == 2) | |
23302 | return cu_headerp->addr_size; | |
23303 | else | |
23304 | return cu_headerp->offset_size; | |
181cebd4 JK |
23305 | } |
23306 | ||
9aa1f1e3 TT |
23307 | /* Return the text offset of the CU. The returned offset comes from |
23308 | this CU's objfile. If this objfile came from a separate debuginfo | |
23309 | file, then the offset may be different from the corresponding | |
23310 | offset in the parent objfile. */ | |
23311 | ||
23312 | CORE_ADDR | |
23313 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
23314 | { | |
bb3fa9d0 | 23315 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
23316 | |
23317 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23318 | } | |
23319 | ||
43988095 JK |
23320 | /* Return DWARF version number of PER_CU. */ |
23321 | ||
23322 | short | |
23323 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
23324 | { | |
23325 | return per_cu->dwarf_version; | |
23326 | } | |
23327 | ||
348e048f DE |
23328 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
23329 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
23330 | |
23331 | static struct dwarf2_per_cu_data * | |
9c541725 | 23332 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 23333 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
23334 | struct objfile *objfile) |
23335 | { | |
23336 | struct dwarf2_per_cu_data *this_cu; | |
23337 | int low, high; | |
36586728 | 23338 | const sect_offset *cu_off; |
ae038cb0 | 23339 | |
ae038cb0 DJ |
23340 | low = 0; |
23341 | high = dwarf2_per_objfile->n_comp_units - 1; | |
23342 | while (high > low) | |
23343 | { | |
36586728 | 23344 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 23345 | int mid = low + (high - low) / 2; |
9a619af0 | 23346 | |
36586728 | 23347 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 23348 | cu_off = &mid_cu->sect_off; |
36586728 | 23349 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 23350 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
23351 | high = mid; |
23352 | else | |
23353 | low = mid + 1; | |
23354 | } | |
23355 | gdb_assert (low == high); | |
36586728 | 23356 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
23357 | cu_off = &this_cu->sect_off; |
23358 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 23359 | { |
36586728 | 23360 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 23361 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
23362 | "offset 0x%x [in module %s]"), |
23363 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 23364 | |
9c541725 PA |
23365 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
23366 | <= sect_off); | |
ae038cb0 DJ |
23367 | return dwarf2_per_objfile->all_comp_units[low-1]; |
23368 | } | |
23369 | else | |
23370 | { | |
23371 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
23372 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
23373 | && sect_off >= this_cu->sect_off + this_cu->length) |
23374 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
23375 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
23376 | return this_cu; |
23377 | } | |
23378 | } | |
23379 | ||
23745b47 | 23380 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 23381 | |
9816fde3 | 23382 | static void |
23745b47 | 23383 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 23384 | { |
9816fde3 | 23385 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
23386 | per_cu->cu = cu; |
23387 | cu->per_cu = per_cu; | |
23388 | cu->objfile = per_cu->objfile; | |
93311388 | 23389 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
23390 | } |
23391 | ||
23392 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
23393 | ||
23394 | static void | |
95554aad TT |
23395 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
23396 | enum language pretend_language) | |
9816fde3 JK |
23397 | { |
23398 | struct attribute *attr; | |
23399 | ||
23400 | /* Set the language we're debugging. */ | |
23401 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
23402 | if (attr) | |
23403 | set_cu_language (DW_UNSND (attr), cu); | |
23404 | else | |
9cded63f | 23405 | { |
95554aad | 23406 | cu->language = pretend_language; |
9cded63f TT |
23407 | cu->language_defn = language_def (cu->language); |
23408 | } | |
dee91e82 | 23409 | |
7d45c7c3 | 23410 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
23411 | } |
23412 | ||
ae038cb0 DJ |
23413 | /* Release one cached compilation unit, CU. We unlink it from the tree |
23414 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
23415 | the caller is responsible for that. |
23416 | NOTE: DATA is a void * because this function is also used as a | |
23417 | cleanup routine. */ | |
ae038cb0 DJ |
23418 | |
23419 | static void | |
68dc6402 | 23420 | free_heap_comp_unit (void *data) |
ae038cb0 | 23421 | { |
9a3c8263 | 23422 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 23423 | |
23745b47 DE |
23424 | gdb_assert (cu->per_cu != NULL); |
23425 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
23426 | cu->per_cu = NULL; |
23427 | ||
23428 | obstack_free (&cu->comp_unit_obstack, NULL); | |
23429 | ||
23430 | xfree (cu); | |
23431 | } | |
23432 | ||
72bf9492 | 23433 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 23434 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 23435 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
23436 | |
23437 | static void | |
23438 | free_stack_comp_unit (void *data) | |
23439 | { | |
9a3c8263 | 23440 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 23441 | |
23745b47 DE |
23442 | gdb_assert (cu->per_cu != NULL); |
23443 | cu->per_cu->cu = NULL; | |
23444 | cu->per_cu = NULL; | |
23445 | ||
72bf9492 DJ |
23446 | obstack_free (&cu->comp_unit_obstack, NULL); |
23447 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
23448 | } |
23449 | ||
23450 | /* Free all cached compilation units. */ | |
23451 | ||
23452 | static void | |
23453 | free_cached_comp_units (void *data) | |
23454 | { | |
330cdd98 | 23455 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
23456 | } |
23457 | ||
23458 | /* Increase the age counter on each cached compilation unit, and free | |
23459 | any that are too old. */ | |
23460 | ||
23461 | static void | |
23462 | age_cached_comp_units (void) | |
23463 | { | |
23464 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23465 | ||
23466 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
23467 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23468 | while (per_cu != NULL) | |
23469 | { | |
23470 | per_cu->cu->last_used ++; | |
b4f54984 | 23471 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
23472 | dwarf2_mark (per_cu->cu); |
23473 | per_cu = per_cu->cu->read_in_chain; | |
23474 | } | |
23475 | ||
23476 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23477 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23478 | while (per_cu != NULL) | |
23479 | { | |
23480 | struct dwarf2_per_cu_data *next_cu; | |
23481 | ||
23482 | next_cu = per_cu->cu->read_in_chain; | |
23483 | ||
23484 | if (!per_cu->cu->mark) | |
23485 | { | |
68dc6402 | 23486 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
23487 | *last_chain = next_cu; |
23488 | } | |
23489 | else | |
23490 | last_chain = &per_cu->cu->read_in_chain; | |
23491 | ||
23492 | per_cu = next_cu; | |
23493 | } | |
23494 | } | |
23495 | ||
23496 | /* Remove a single compilation unit from the cache. */ | |
23497 | ||
23498 | static void | |
dee91e82 | 23499 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
23500 | { |
23501 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23502 | ||
23503 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23504 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23505 | while (per_cu != NULL) | |
23506 | { | |
23507 | struct dwarf2_per_cu_data *next_cu; | |
23508 | ||
23509 | next_cu = per_cu->cu->read_in_chain; | |
23510 | ||
dee91e82 | 23511 | if (per_cu == target_per_cu) |
ae038cb0 | 23512 | { |
68dc6402 | 23513 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 23514 | per_cu->cu = NULL; |
ae038cb0 DJ |
23515 | *last_chain = next_cu; |
23516 | break; | |
23517 | } | |
23518 | else | |
23519 | last_chain = &per_cu->cu->read_in_chain; | |
23520 | ||
23521 | per_cu = next_cu; | |
23522 | } | |
23523 | } | |
23524 | ||
fe3e1990 DJ |
23525 | /* Release all extra memory associated with OBJFILE. */ |
23526 | ||
23527 | void | |
23528 | dwarf2_free_objfile (struct objfile *objfile) | |
23529 | { | |
9a3c8263 SM |
23530 | dwarf2_per_objfile |
23531 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23532 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
23533 | |
23534 | if (dwarf2_per_objfile == NULL) | |
23535 | return; | |
23536 | ||
330cdd98 | 23537 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
23538 | } |
23539 | ||
dee91e82 DE |
23540 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23541 | We store these in a hash table separate from the DIEs, and preserve them | |
23542 | when the DIEs are flushed out of cache. | |
23543 | ||
23544 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23545 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23546 | or the type may come from a DWO file. Furthermore, while it's more logical |
23547 | to use per_cu->section+offset, with Fission the section with the data is in | |
23548 | the DWO file but we don't know that section at the point we need it. | |
23549 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23550 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23551 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23552 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23553 | |
dee91e82 | 23554 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23555 | { |
dee91e82 | 23556 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23557 | sect_offset sect_off; |
1c379e20 DJ |
23558 | struct type *type; |
23559 | }; | |
23560 | ||
dee91e82 | 23561 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23562 | |
23563 | static hashval_t | |
dee91e82 | 23564 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23565 | { |
9a3c8263 SM |
23566 | const struct dwarf2_per_cu_offset_and_type *ofs |
23567 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23568 | |
9c541725 | 23569 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23570 | } |
23571 | ||
dee91e82 | 23572 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23573 | |
23574 | static int | |
dee91e82 | 23575 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23576 | { |
9a3c8263 SM |
23577 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23578 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23579 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23580 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23581 | |
dee91e82 | 23582 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23583 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23584 | } |
23585 | ||
23586 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23587 | table if necessary. For convenience, return TYPE. |
23588 | ||
23589 | The DIEs reading must have careful ordering to: | |
23590 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23591 | reading current DIE. | |
23592 | * Not trying to dereference contents of still incompletely read in types | |
23593 | while reading in other DIEs. | |
23594 | * Enable referencing still incompletely read in types just by a pointer to | |
23595 | the type without accessing its fields. | |
23596 | ||
23597 | Therefore caller should follow these rules: | |
23598 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23599 | before building the type and calling set_die_type. | |
e71ec853 | 23600 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23601 | possible before fetching more types to complete the current type. |
23602 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23603 | |
f792889a | 23604 | static struct type * |
1c379e20 DJ |
23605 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23606 | { | |
dee91e82 | 23607 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23608 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23609 | struct attribute *attr; |
23610 | struct dynamic_prop prop; | |
1c379e20 | 23611 | |
b4ba55a1 JB |
23612 | /* For Ada types, make sure that the gnat-specific data is always |
23613 | initialized (if not already set). There are a few types where | |
23614 | we should not be doing so, because the type-specific area is | |
23615 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23616 | where the type-specific area is used to store the floatformat). | |
23617 | But this is not a problem, because the gnat-specific information | |
23618 | is actually not needed for these types. */ | |
23619 | if (need_gnat_info (cu) | |
23620 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23621 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23622 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23623 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23624 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23625 | && !HAVE_GNAT_AUX_INFO (type)) |
23626 | INIT_GNAT_SPECIFIC (type); | |
23627 | ||
3f2f83dd KB |
23628 | /* Read DW_AT_allocated and set in type. */ |
23629 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23630 | if (attr_form_is_block (attr)) | |
23631 | { | |
23632 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23633 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23634 | } | |
23635 | else if (attr != NULL) | |
23636 | { | |
23637 | complaint (&symfile_complaints, | |
9c541725 PA |
23638 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23639 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23640 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23641 | } |
23642 | ||
23643 | /* Read DW_AT_associated and set in type. */ | |
23644 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23645 | if (attr_form_is_block (attr)) | |
23646 | { | |
23647 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23648 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23649 | } | |
23650 | else if (attr != NULL) | |
23651 | { | |
23652 | complaint (&symfile_complaints, | |
9c541725 PA |
23653 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23654 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23655 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23656 | } |
23657 | ||
3cdcd0ce JB |
23658 | /* Read DW_AT_data_location and set in type. */ |
23659 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23660 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23661 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23662 | |
dee91e82 | 23663 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23664 | { |
dee91e82 DE |
23665 | dwarf2_per_objfile->die_type_hash = |
23666 | htab_create_alloc_ex (127, | |
23667 | per_cu_offset_and_type_hash, | |
23668 | per_cu_offset_and_type_eq, | |
23669 | NULL, | |
23670 | &objfile->objfile_obstack, | |
23671 | hashtab_obstack_allocate, | |
23672 | dummy_obstack_deallocate); | |
f792889a | 23673 | } |
1c379e20 | 23674 | |
dee91e82 | 23675 | ofs.per_cu = cu->per_cu; |
9c541725 | 23676 | ofs.sect_off = die->sect_off; |
1c379e20 | 23677 | ofs.type = type; |
dee91e82 DE |
23678 | slot = (struct dwarf2_per_cu_offset_and_type **) |
23679 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
23680 | if (*slot) |
23681 | complaint (&symfile_complaints, | |
23682 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 23683 | to_underlying (die->sect_off)); |
8d749320 SM |
23684 | *slot = XOBNEW (&objfile->objfile_obstack, |
23685 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23686 | **slot = ofs; |
f792889a | 23687 | return type; |
1c379e20 DJ |
23688 | } |
23689 | ||
9c541725 | 23690 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23691 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23692 | |
23693 | static struct type * | |
9c541725 | 23694 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23695 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23696 | { |
dee91e82 | 23697 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 23698 | |
dee91e82 | 23699 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23700 | return NULL; |
1c379e20 | 23701 | |
dee91e82 | 23702 | ofs.per_cu = per_cu; |
9c541725 | 23703 | ofs.sect_off = sect_off; |
9a3c8263 SM |
23704 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
23705 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
23706 | if (slot) |
23707 | return slot->type; | |
23708 | else | |
23709 | return NULL; | |
23710 | } | |
23711 | ||
02142a6c | 23712 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23713 | or return NULL if DIE does not have a saved type. */ |
23714 | ||
23715 | static struct type * | |
23716 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
23717 | { | |
9c541725 | 23718 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
23719 | } |
23720 | ||
10b3939b DJ |
23721 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
23722 | ||
23723 | static void | |
23724 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
23725 | struct dwarf2_per_cu_data *ref_per_cu) | |
23726 | { | |
23727 | void **slot; | |
23728 | ||
23729 | if (cu->dependencies == NULL) | |
23730 | cu->dependencies | |
23731 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
23732 | NULL, &cu->comp_unit_obstack, | |
23733 | hashtab_obstack_allocate, | |
23734 | dummy_obstack_deallocate); | |
23735 | ||
23736 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
23737 | if (*slot == NULL) | |
23738 | *slot = ref_per_cu; | |
23739 | } | |
1c379e20 | 23740 | |
f504f079 DE |
23741 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
23742 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
23743 | cache that we must keep because we are keeping CU. */ |
23744 | ||
10b3939b DJ |
23745 | static int |
23746 | dwarf2_mark_helper (void **slot, void *data) | |
23747 | { | |
23748 | struct dwarf2_per_cu_data *per_cu; | |
23749 | ||
23750 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
23751 | |
23752 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
23753 | reading of the chain. As such dependencies remain valid it is not much | |
23754 | useful to track and undo them during QUIT cleanups. */ | |
23755 | if (per_cu->cu == NULL) | |
23756 | return 1; | |
23757 | ||
10b3939b DJ |
23758 | if (per_cu->cu->mark) |
23759 | return 1; | |
23760 | per_cu->cu->mark = 1; | |
23761 | ||
23762 | if (per_cu->cu->dependencies != NULL) | |
23763 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
23764 | ||
23765 | return 1; | |
23766 | } | |
23767 | ||
f504f079 DE |
23768 | /* Set the mark field in CU and in every other compilation unit in the |
23769 | cache that we must keep because we are keeping CU. */ | |
23770 | ||
ae038cb0 DJ |
23771 | static void |
23772 | dwarf2_mark (struct dwarf2_cu *cu) | |
23773 | { | |
23774 | if (cu->mark) | |
23775 | return; | |
23776 | cu->mark = 1; | |
10b3939b DJ |
23777 | if (cu->dependencies != NULL) |
23778 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
23779 | } |
23780 | ||
23781 | static void | |
23782 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
23783 | { | |
23784 | while (per_cu) | |
23785 | { | |
23786 | per_cu->cu->mark = 0; | |
23787 | per_cu = per_cu->cu->read_in_chain; | |
23788 | } | |
72bf9492 DJ |
23789 | } |
23790 | ||
72bf9492 DJ |
23791 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
23792 | is its offset in .debug_info for this objfile. */ | |
23793 | ||
23794 | static hashval_t | |
23795 | partial_die_hash (const void *item) | |
23796 | { | |
9a3c8263 SM |
23797 | const struct partial_die_info *part_die |
23798 | = (const struct partial_die_info *) item; | |
9a619af0 | 23799 | |
9c541725 | 23800 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
23801 | } |
23802 | ||
23803 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
23804 | are equal if they have the same offset. */ | |
23805 | ||
23806 | static int | |
23807 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
23808 | { | |
9a3c8263 SM |
23809 | const struct partial_die_info *part_die_lhs |
23810 | = (const struct partial_die_info *) item_lhs; | |
23811 | const struct partial_die_info *part_die_rhs | |
23812 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 23813 | |
9c541725 | 23814 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
23815 | } |
23816 | ||
b4f54984 DE |
23817 | static struct cmd_list_element *set_dwarf_cmdlist; |
23818 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
23819 | |
23820 | static void | |
981a3fb3 | 23821 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 23822 | { |
b4f54984 | 23823 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 23824 | gdb_stdout); |
ae038cb0 DJ |
23825 | } |
23826 | ||
23827 | static void | |
981a3fb3 | 23828 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 23829 | { |
b4f54984 | 23830 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
23831 | } |
23832 | ||
4bf44c1c | 23833 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
23834 | |
23835 | static void | |
c1bd65d0 | 23836 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 23837 | { |
9a3c8263 | 23838 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 23839 | int ix; |
8b70b953 | 23840 | |
626f2d1c TT |
23841 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
23842 | cleaning up. */ | |
23843 | dwarf2_per_objfile = NULL; | |
23844 | ||
59b0c7c1 JB |
23845 | for (ix = 0; ix < data->n_comp_units; ++ix) |
23846 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 23847 | |
59b0c7c1 | 23848 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 23849 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
23850 | data->all_type_units[ix]->per_cu.imported_symtabs); |
23851 | xfree (data->all_type_units); | |
95554aad | 23852 | |
8b70b953 | 23853 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
23854 | |
23855 | if (data->dwo_files) | |
23856 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
23857 | if (data->dwp_file) |
23858 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
23859 | |
23860 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
23861 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
3f563c84 PA |
23862 | |
23863 | if (data->index_table != NULL) | |
23864 | data->index_table->~mapped_index (); | |
9291a0cd TT |
23865 | } |
23866 | ||
23867 | \f | |
ae2de4f8 | 23868 | /* The "save gdb-index" command. */ |
9291a0cd | 23869 | |
bc8f2430 JK |
23870 | /* In-memory buffer to prepare data to be written later to a file. */ |
23871 | class data_buf | |
9291a0cd | 23872 | { |
bc8f2430 | 23873 | public: |
bc8f2430 JK |
23874 | /* Copy DATA to the end of the buffer. */ |
23875 | template<typename T> | |
23876 | void append_data (const T &data) | |
23877 | { | |
23878 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
23879 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 23880 | grow (sizeof (data))); |
bc8f2430 | 23881 | } |
b89be57b | 23882 | |
c2f134ac PA |
23883 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
23884 | terminating zero is appended too. */ | |
bc8f2430 JK |
23885 | void append_cstr0 (const char *cstr) |
23886 | { | |
23887 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
23888 | std::copy (cstr, cstr + size, grow (size)); |
23889 | } | |
23890 | ||
23891 | /* Accept a host-format integer in VAL and append it to the buffer | |
23892 | as a target-format integer which is LEN bytes long. */ | |
23893 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
23894 | { | |
23895 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 23896 | } |
9291a0cd | 23897 | |
bc8f2430 JK |
23898 | /* Return the size of the buffer. */ |
23899 | size_t size () const | |
23900 | { | |
23901 | return m_vec.size (); | |
23902 | } | |
23903 | ||
23904 | /* Write the buffer to FILE. */ | |
23905 | void file_write (FILE *file) const | |
23906 | { | |
a81e6d4d PA |
23907 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
23908 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
23909 | } |
23910 | ||
23911 | private: | |
c2f134ac PA |
23912 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
23913 | the start of the new block. */ | |
23914 | gdb_byte *grow (size_t size) | |
23915 | { | |
23916 | m_vec.resize (m_vec.size () + size); | |
23917 | return &*m_vec.end () - size; | |
23918 | } | |
23919 | ||
d5722aa2 | 23920 | gdb::byte_vector m_vec; |
bc8f2430 | 23921 | }; |
9291a0cd TT |
23922 | |
23923 | /* An entry in the symbol table. */ | |
23924 | struct symtab_index_entry | |
23925 | { | |
23926 | /* The name of the symbol. */ | |
23927 | const char *name; | |
23928 | /* The offset of the name in the constant pool. */ | |
23929 | offset_type index_offset; | |
23930 | /* A sorted vector of the indices of all the CUs that hold an object | |
23931 | of this name. */ | |
bc8f2430 | 23932 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
23933 | }; |
23934 | ||
23935 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
23936 | struct mapped_symtab | |
23937 | { | |
bc8f2430 JK |
23938 | mapped_symtab () |
23939 | { | |
23940 | data.resize (1024); | |
23941 | } | |
b89be57b | 23942 | |
bc8f2430 | 23943 | offset_type n_elements = 0; |
4b76cda9 | 23944 | std::vector<symtab_index_entry> data; |
bc8f2430 | 23945 | }; |
9291a0cd | 23946 | |
bc8f2430 | 23947 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
23948 | the slot. |
23949 | ||
23950 | Function is used only during write_hash_table so no index format backward | |
23951 | compatibility is needed. */ | |
b89be57b | 23952 | |
4b76cda9 | 23953 | static symtab_index_entry & |
9291a0cd TT |
23954 | find_slot (struct mapped_symtab *symtab, const char *name) |
23955 | { | |
559a7a62 | 23956 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 23957 | |
bc8f2430 JK |
23958 | index = hash & (symtab->data.size () - 1); |
23959 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
23960 | |
23961 | for (;;) | |
23962 | { | |
4b76cda9 PA |
23963 | if (symtab->data[index].name == NULL |
23964 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
23965 | return symtab->data[index]; |
23966 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
23967 | } |
23968 | } | |
23969 | ||
23970 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 23971 | |
9291a0cd TT |
23972 | static void |
23973 | hash_expand (struct mapped_symtab *symtab) | |
23974 | { | |
bc8f2430 | 23975 | auto old_entries = std::move (symtab->data); |
9291a0cd | 23976 | |
bc8f2430 JK |
23977 | symtab->data.clear (); |
23978 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 23979 | |
bc8f2430 | 23980 | for (auto &it : old_entries) |
4b76cda9 | 23981 | if (it.name != NULL) |
bc8f2430 | 23982 | { |
4b76cda9 | 23983 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
23984 | ref = std::move (it); |
23985 | } | |
9291a0cd TT |
23986 | } |
23987 | ||
156942c7 DE |
23988 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
23989 | CU_INDEX is the index of the CU in which the symbol appears. | |
23990 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 23991 | |
9291a0cd TT |
23992 | static void |
23993 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 23994 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
23995 | offset_type cu_index) |
23996 | { | |
156942c7 | 23997 | offset_type cu_index_and_attrs; |
9291a0cd TT |
23998 | |
23999 | ++symtab->n_elements; | |
bc8f2430 | 24000 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
24001 | hash_expand (symtab); |
24002 | ||
4b76cda9 PA |
24003 | symtab_index_entry &slot = find_slot (symtab, name); |
24004 | if (slot.name == NULL) | |
9291a0cd | 24005 | { |
4b76cda9 | 24006 | slot.name = name; |
156942c7 | 24007 | /* index_offset is set later. */ |
9291a0cd | 24008 | } |
156942c7 DE |
24009 | |
24010 | cu_index_and_attrs = 0; | |
24011 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
24012 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
24013 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
24014 | ||
24015 | /* We don't want to record an index value twice as we want to avoid the | |
24016 | duplication. | |
24017 | We process all global symbols and then all static symbols | |
24018 | (which would allow us to avoid the duplication by only having to check | |
24019 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
24020 | To keep things simple we don't worry about the duplication here and | |
24021 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 24022 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
24023 | } |
24024 | ||
24025 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
24026 | ||
24027 | static void | |
24028 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
24029 | { | |
4b76cda9 | 24030 | for (auto &entry : symtab->data) |
156942c7 | 24031 | { |
4b76cda9 | 24032 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 24033 | { |
4b76cda9 | 24034 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
24035 | std::sort (cu_indices.begin (), cu_indices.end ()); |
24036 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
24037 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
24038 | } |
24039 | } | |
9291a0cd TT |
24040 | } |
24041 | ||
bc8f2430 JK |
24042 | /* A form of 'const char *' suitable for container keys. Only the |
24043 | pointer is stored. The strings themselves are compared, not the | |
24044 | pointers. */ | |
24045 | class c_str_view | |
9291a0cd | 24046 | { |
bc8f2430 JK |
24047 | public: |
24048 | c_str_view (const char *cstr) | |
24049 | : m_cstr (cstr) | |
24050 | {} | |
9291a0cd | 24051 | |
bc8f2430 JK |
24052 | bool operator== (const c_str_view &other) const |
24053 | { | |
24054 | return strcmp (m_cstr, other.m_cstr) == 0; | |
24055 | } | |
9291a0cd | 24056 | |
bc8f2430 JK |
24057 | private: |
24058 | friend class c_str_view_hasher; | |
24059 | const char *const m_cstr; | |
24060 | }; | |
9291a0cd | 24061 | |
bc8f2430 JK |
24062 | /* A std::unordered_map::hasher for c_str_view that uses the right |
24063 | hash function for strings in a mapped index. */ | |
24064 | class c_str_view_hasher | |
24065 | { | |
24066 | public: | |
24067 | size_t operator () (const c_str_view &x) const | |
24068 | { | |
24069 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
24070 | } | |
24071 | }; | |
b89be57b | 24072 | |
bc8f2430 JK |
24073 | /* A std::unordered_map::hasher for std::vector<>. */ |
24074 | template<typename T> | |
24075 | class vector_hasher | |
9291a0cd | 24076 | { |
bc8f2430 JK |
24077 | public: |
24078 | size_t operator () (const std::vector<T> &key) const | |
24079 | { | |
24080 | return iterative_hash (key.data (), | |
24081 | sizeof (key.front ()) * key.size (), 0); | |
24082 | } | |
24083 | }; | |
9291a0cd | 24084 | |
bc8f2430 JK |
24085 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
24086 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 24087 | |
bc8f2430 JK |
24088 | static void |
24089 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
24090 | { | |
24091 | { | |
24092 | /* Elements are sorted vectors of the indices of all the CUs that | |
24093 | hold an object of this name. */ | |
24094 | std::unordered_map<std::vector<offset_type>, offset_type, | |
24095 | vector_hasher<offset_type>> | |
24096 | symbol_hash_table; | |
24097 | ||
24098 | /* We add all the index vectors to the constant pool first, to | |
24099 | ensure alignment is ok. */ | |
4b76cda9 | 24100 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 24101 | { |
4b76cda9 | 24102 | if (entry.name == NULL) |
bc8f2430 | 24103 | continue; |
4b76cda9 | 24104 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
24105 | |
24106 | /* Finding before inserting is faster than always trying to | |
24107 | insert, because inserting always allocates a node, does the | |
24108 | lookup, and then destroys the new node if another node | |
24109 | already had the same key. C++17 try_emplace will avoid | |
24110 | this. */ | |
24111 | const auto found | |
4b76cda9 | 24112 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
24113 | if (found != symbol_hash_table.end ()) |
24114 | { | |
4b76cda9 | 24115 | entry.index_offset = found->second; |
70a1152b PA |
24116 | continue; |
24117 | } | |
24118 | ||
4b76cda9 PA |
24119 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
24120 | entry.index_offset = cpool.size (); | |
24121 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
24122 | for (const auto index : entry.cu_indices) | |
24123 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
24124 | } |
24125 | } | |
9291a0cd TT |
24126 | |
24127 | /* Now write out the hash table. */ | |
bc8f2430 | 24128 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 24129 | for (const auto &entry : symtab->data) |
9291a0cd TT |
24130 | { |
24131 | offset_type str_off, vec_off; | |
24132 | ||
4b76cda9 | 24133 | if (entry.name != NULL) |
9291a0cd | 24134 | { |
4b76cda9 | 24135 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 24136 | if (insertpair.second) |
4b76cda9 | 24137 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 24138 | str_off = insertpair.first->second; |
4b76cda9 | 24139 | vec_off = entry.index_offset; |
9291a0cd TT |
24140 | } |
24141 | else | |
24142 | { | |
24143 | /* While 0 is a valid constant pool index, it is not valid | |
24144 | to have 0 for both offsets. */ | |
24145 | str_off = 0; | |
24146 | vec_off = 0; | |
24147 | } | |
24148 | ||
bc8f2430 JK |
24149 | output.append_data (MAYBE_SWAP (str_off)); |
24150 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 24151 | } |
9291a0cd TT |
24152 | } |
24153 | ||
bc8f2430 | 24154 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
24155 | |
24156 | /* Helper struct for building the address table. */ | |
24157 | struct addrmap_index_data | |
24158 | { | |
bc8f2430 JK |
24159 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
24160 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
24161 | {} | |
24162 | ||
0a5429f6 | 24163 | struct objfile *objfile; |
bc8f2430 JK |
24164 | data_buf &addr_vec; |
24165 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
24166 | |
24167 | /* Non-zero if the previous_* fields are valid. | |
24168 | We can't write an entry until we see the next entry (since it is only then | |
24169 | that we know the end of the entry). */ | |
24170 | int previous_valid; | |
24171 | /* Index of the CU in the table of all CUs in the index file. */ | |
24172 | unsigned int previous_cu_index; | |
0963b4bd | 24173 | /* Start address of the CU. */ |
0a5429f6 DE |
24174 | CORE_ADDR previous_cu_start; |
24175 | }; | |
24176 | ||
bc8f2430 | 24177 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 24178 | |
9291a0cd | 24179 | static void |
bc8f2430 | 24180 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 24181 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 24182 | { |
9291a0cd TT |
24183 | CORE_ADDR baseaddr; |
24184 | ||
24185 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
24186 | ||
c2f134ac PA |
24187 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
24188 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 24189 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
24190 | } |
24191 | ||
24192 | /* Worker function for traversing an addrmap to build the address table. */ | |
24193 | ||
24194 | static int | |
24195 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
24196 | { | |
9a3c8263 SM |
24197 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
24198 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
24199 | |
24200 | if (data->previous_valid) | |
bc8f2430 | 24201 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
24202 | data->previous_cu_start, start_addr, |
24203 | data->previous_cu_index); | |
24204 | ||
24205 | data->previous_cu_start = start_addr; | |
24206 | if (pst != NULL) | |
24207 | { | |
bc8f2430 JK |
24208 | const auto it = data->cu_index_htab.find (pst); |
24209 | gdb_assert (it != data->cu_index_htab.cend ()); | |
24210 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
24211 | data->previous_valid = 1; |
24212 | } | |
24213 | else | |
bc8f2430 | 24214 | data->previous_valid = 0; |
0a5429f6 DE |
24215 | |
24216 | return 0; | |
24217 | } | |
24218 | ||
bc8f2430 | 24219 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
24220 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
24221 | in the index file. */ | |
24222 | ||
24223 | static void | |
bc8f2430 JK |
24224 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
24225 | psym_index_map &cu_index_htab) | |
0a5429f6 | 24226 | { |
bc8f2430 | 24227 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
24228 | |
24229 | /* When writing the address table, we have to cope with the fact that | |
24230 | the addrmap iterator only provides the start of a region; we have to | |
24231 | wait until the next invocation to get the start of the next region. */ | |
24232 | ||
24233 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
24234 | addrmap_index_data.previous_valid = 0; |
24235 | ||
24236 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
24237 | &addrmap_index_data); | |
24238 | ||
24239 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
24240 | is valid, but we should still handle it. | |
24241 | The end address is recorded as the start of the next region, but that | |
24242 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
24243 | anyway. */ | |
24244 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 24245 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
24246 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
24247 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
24248 | } |
24249 | ||
156942c7 DE |
24250 | /* Return the symbol kind of PSYM. */ |
24251 | ||
24252 | static gdb_index_symbol_kind | |
24253 | symbol_kind (struct partial_symbol *psym) | |
24254 | { | |
24255 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
24256 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
24257 | ||
24258 | switch (domain) | |
24259 | { | |
24260 | case VAR_DOMAIN: | |
24261 | switch (aclass) | |
24262 | { | |
24263 | case LOC_BLOCK: | |
24264 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
24265 | case LOC_TYPEDEF: | |
24266 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24267 | case LOC_COMPUTED: | |
24268 | case LOC_CONST_BYTES: | |
24269 | case LOC_OPTIMIZED_OUT: | |
24270 | case LOC_STATIC: | |
24271 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24272 | case LOC_CONST: | |
24273 | /* Note: It's currently impossible to recognize psyms as enum values | |
24274 | short of reading the type info. For now punt. */ | |
24275 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
24276 | default: | |
24277 | /* There are other LOC_FOO values that one might want to classify | |
24278 | as variables, but dwarf2read.c doesn't currently use them. */ | |
24279 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24280 | } | |
24281 | case STRUCT_DOMAIN: | |
24282 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
24283 | default: | |
24284 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
24285 | } | |
24286 | } | |
24287 | ||
9291a0cd | 24288 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 24289 | |
9291a0cd TT |
24290 | static void |
24291 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 24292 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
24293 | struct partial_symbol **psymp, |
24294 | int count, | |
987d643c TT |
24295 | offset_type cu_index, |
24296 | int is_static) | |
9291a0cd TT |
24297 | { |
24298 | for (; count-- > 0; ++psymp) | |
24299 | { | |
156942c7 | 24300 | struct partial_symbol *psym = *psymp; |
987d643c | 24301 | |
156942c7 | 24302 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 24303 | error (_("Ada is not currently supported by the index")); |
987d643c | 24304 | |
987d643c | 24305 | /* Only add a given psymbol once. */ |
bc8f2430 | 24306 | if (psyms_seen.insert (psym).second) |
987d643c | 24307 | { |
156942c7 DE |
24308 | gdb_index_symbol_kind kind = symbol_kind (psym); |
24309 | ||
156942c7 DE |
24310 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
24311 | is_static, kind, cu_index); | |
987d643c | 24312 | } |
9291a0cd TT |
24313 | } |
24314 | } | |
24315 | ||
1fd400ff TT |
24316 | /* A helper struct used when iterating over debug_types. */ |
24317 | struct signatured_type_index_data | |
24318 | { | |
bc8f2430 JK |
24319 | signatured_type_index_data (data_buf &types_list_, |
24320 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
24321 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
24322 | {} | |
24323 | ||
1fd400ff TT |
24324 | struct objfile *objfile; |
24325 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
24326 | data_buf &types_list; |
24327 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
24328 | int cu_index; |
24329 | }; | |
24330 | ||
24331 | /* A helper function that writes a single signatured_type to an | |
24332 | obstack. */ | |
b89be57b | 24333 | |
1fd400ff TT |
24334 | static int |
24335 | write_one_signatured_type (void **slot, void *d) | |
24336 | { | |
9a3c8263 SM |
24337 | struct signatured_type_index_data *info |
24338 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 24339 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 24340 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
24341 | |
24342 | write_psymbols (info->symtab, | |
987d643c | 24343 | info->psyms_seen, |
af5bf4ad | 24344 | &info->objfile->global_psymbols[psymtab->globals_offset], |
987d643c TT |
24345 | psymtab->n_global_syms, info->cu_index, |
24346 | 0); | |
1fd400ff | 24347 | write_psymbols (info->symtab, |
987d643c | 24348 | info->psyms_seen, |
af5bf4ad | 24349 | &info->objfile->static_psymbols[psymtab->statics_offset], |
987d643c TT |
24350 | psymtab->n_static_syms, info->cu_index, |
24351 | 1); | |
1fd400ff | 24352 | |
c2f134ac PA |
24353 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24354 | to_underlying (entry->per_cu.sect_off)); | |
24355 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
24356 | to_underlying (entry->type_offset_in_tu)); | |
24357 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
24358 | |
24359 | ++info->cu_index; | |
24360 | ||
24361 | return 1; | |
24362 | } | |
24363 | ||
e8f8bcb3 PA |
24364 | /* Recurse into all "included" dependencies and count their symbols as |
24365 | if they appeared in this psymtab. */ | |
24366 | ||
24367 | static void | |
24368 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
24369 | size_t &psyms_seen) | |
24370 | { | |
24371 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
24372 | if (psymtab->dependencies[i]->user != NULL) | |
24373 | recursively_count_psymbols (psymtab->dependencies[i], | |
24374 | psyms_seen); | |
24375 | ||
24376 | psyms_seen += psymtab->n_global_syms; | |
24377 | psyms_seen += psymtab->n_static_syms; | |
24378 | } | |
24379 | ||
95554aad TT |
24380 | /* Recurse into all "included" dependencies and write their symbols as |
24381 | if they appeared in this psymtab. */ | |
24382 | ||
24383 | static void | |
24384 | recursively_write_psymbols (struct objfile *objfile, | |
24385 | struct partial_symtab *psymtab, | |
24386 | struct mapped_symtab *symtab, | |
bc8f2430 | 24387 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
24388 | offset_type cu_index) |
24389 | { | |
24390 | int i; | |
24391 | ||
24392 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
24393 | if (psymtab->dependencies[i]->user != NULL) | |
24394 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
24395 | symtab, psyms_seen, cu_index); | |
24396 | ||
24397 | write_psymbols (symtab, | |
24398 | psyms_seen, | |
af5bf4ad | 24399 | &objfile->global_psymbols[psymtab->globals_offset], |
95554aad TT |
24400 | psymtab->n_global_syms, cu_index, |
24401 | 0); | |
24402 | write_psymbols (symtab, | |
24403 | psyms_seen, | |
af5bf4ad | 24404 | &objfile->static_psymbols[psymtab->statics_offset], |
95554aad TT |
24405 | psymtab->n_static_syms, cu_index, |
24406 | 1); | |
24407 | } | |
24408 | ||
9291a0cd | 24409 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 24410 | |
9291a0cd TT |
24411 | static void |
24412 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
24413 | { | |
9291a0cd TT |
24414 | if (dwarf2_per_objfile->using_index) |
24415 | error (_("Cannot use an index to create the index")); | |
24416 | ||
8b70b953 TT |
24417 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
24418 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
24419 | ||
260b681b DE |
24420 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
24421 | return; | |
24422 | ||
bc8f2430 | 24423 | struct stat st; |
4262abfb JK |
24424 | if (stat (objfile_name (objfile), &st) < 0) |
24425 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 24426 | |
bc8f2430 JK |
24427 | std::string filename (std::string (dir) + SLASH_STRING |
24428 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 24429 | |
d419f42d | 24430 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 24431 | if (!out_file) |
bc8f2430 | 24432 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 24433 | |
16b7a719 PA |
24434 | /* Order matters here; we want FILE to be closed before FILENAME is |
24435 | unlinked, because on MS-Windows one cannot delete a file that is | |
24436 | still open. (Don't call anything here that might throw until | |
24437 | file_closer is created.) */ | |
bc8f2430 | 24438 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 24439 | gdb_file_up close_out_file (out_file); |
9291a0cd | 24440 | |
bc8f2430 JK |
24441 | mapped_symtab symtab; |
24442 | data_buf cu_list; | |
987d643c | 24443 | |
0a5429f6 DE |
24444 | /* While we're scanning CU's create a table that maps a psymtab pointer |
24445 | (which is what addrmap records) to its index (which is what is recorded | |
24446 | in the index file). This will later be needed to write the address | |
24447 | table. */ | |
bc8f2430 JK |
24448 | psym_index_map cu_index_htab; |
24449 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
24450 | |
24451 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
24452 | work here. Also, the debug_types entries do not appear in |
24453 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
24454 | |
24455 | /* The psyms_seen set is potentially going to be largish (~40k | |
24456 | elements when indexing a -g3 build of GDB itself). Estimate the | |
24457 | number of elements in order to avoid too many rehashes, which | |
24458 | require rebuilding buckets and thus many trips to | |
24459 | malloc/free. */ | |
24460 | size_t psyms_count = 0; | |
24461 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24462 | { | |
24463 | struct dwarf2_per_cu_data *per_cu | |
24464 | = dwarf2_per_objfile->all_comp_units[i]; | |
24465 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
24466 | ||
24467 | if (psymtab != NULL && psymtab->user == NULL) | |
24468 | recursively_count_psymbols (psymtab, psyms_count); | |
24469 | } | |
24470 | /* Generating an index for gdb itself shows a ratio of | |
24471 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
24472 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 24473 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 24474 | { |
3e43a32a MS |
24475 | struct dwarf2_per_cu_data *per_cu |
24476 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 24477 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 24478 | |
92fac807 JK |
24479 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
24480 | It may be referenced from a local scope but in such case it does not | |
24481 | need to be present in .gdb_index. */ | |
24482 | if (psymtab == NULL) | |
24483 | continue; | |
24484 | ||
95554aad | 24485 | if (psymtab->user == NULL) |
bc8f2430 JK |
24486 | recursively_write_psymbols (objfile, psymtab, &symtab, |
24487 | psyms_seen, i); | |
9291a0cd | 24488 | |
bc8f2430 JK |
24489 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
24490 | gdb_assert (insertpair.second); | |
9291a0cd | 24491 | |
c2f134ac PA |
24492 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
24493 | to_underlying (per_cu->sect_off)); | |
24494 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
24495 | } |
24496 | ||
0a5429f6 | 24497 | /* Dump the address map. */ |
bc8f2430 JK |
24498 | data_buf addr_vec; |
24499 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 24500 | |
1fd400ff | 24501 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 24502 | data_buf types_cu_list; |
1fd400ff TT |
24503 | if (dwarf2_per_objfile->signatured_types) |
24504 | { | |
bc8f2430 JK |
24505 | signatured_type_index_data sig_data (types_cu_list, |
24506 | psyms_seen); | |
1fd400ff TT |
24507 | |
24508 | sig_data.objfile = objfile; | |
bc8f2430 | 24509 | sig_data.symtab = &symtab; |
1fd400ff TT |
24510 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
24511 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
24512 | write_one_signatured_type, &sig_data); | |
24513 | } | |
24514 | ||
156942c7 DE |
24515 | /* Now that we've processed all symbols we can shrink their cu_indices |
24516 | lists. */ | |
bc8f2430 | 24517 | uniquify_cu_indices (&symtab); |
156942c7 | 24518 | |
bc8f2430 JK |
24519 | data_buf symtab_vec, constant_pool; |
24520 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 24521 | |
bc8f2430 JK |
24522 | data_buf contents; |
24523 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
24524 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
24525 | |
24526 | /* The version number. */ | |
bc8f2430 | 24527 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
24528 | |
24529 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
24530 | contents.append_data (MAYBE_SWAP (total_len)); |
24531 | total_len += cu_list.size (); | |
9291a0cd | 24532 | |
1fd400ff | 24533 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
24534 | contents.append_data (MAYBE_SWAP (total_len)); |
24535 | total_len += types_cu_list.size (); | |
1fd400ff | 24536 | |
9291a0cd | 24537 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
24538 | contents.append_data (MAYBE_SWAP (total_len)); |
24539 | total_len += addr_vec.size (); | |
9291a0cd TT |
24540 | |
24541 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
24542 | contents.append_data (MAYBE_SWAP (total_len)); |
24543 | total_len += symtab_vec.size (); | |
9291a0cd TT |
24544 | |
24545 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
24546 | contents.append_data (MAYBE_SWAP (total_len)); |
24547 | total_len += constant_pool.size (); | |
9291a0cd | 24548 | |
bc8f2430 | 24549 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 24550 | |
bc8f2430 JK |
24551 | contents.file_write (out_file); |
24552 | cu_list.file_write (out_file); | |
24553 | types_cu_list.file_write (out_file); | |
24554 | addr_vec.file_write (out_file); | |
24555 | symtab_vec.file_write (out_file); | |
24556 | constant_pool.file_write (out_file); | |
9291a0cd | 24557 | |
bef155c3 TT |
24558 | /* We want to keep the file. */ |
24559 | unlink_file.keep (); | |
9291a0cd TT |
24560 | } |
24561 | ||
90476074 TT |
24562 | /* Implementation of the `save gdb-index' command. |
24563 | ||
24564 | Note that the file format used by this command is documented in the | |
24565 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 24566 | |
9291a0cd | 24567 | static void |
8384c356 | 24568 | save_gdb_index_command (const char *arg, int from_tty) |
9291a0cd TT |
24569 | { |
24570 | struct objfile *objfile; | |
24571 | ||
24572 | if (!arg || !*arg) | |
96d19272 | 24573 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
24574 | |
24575 | ALL_OBJFILES (objfile) | |
24576 | { | |
24577 | struct stat st; | |
24578 | ||
24579 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 24580 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
24581 | continue; |
24582 | ||
9a3c8263 SM |
24583 | dwarf2_per_objfile |
24584 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
24585 | dwarf2_objfile_data_key); | |
9291a0cd TT |
24586 | if (dwarf2_per_objfile) |
24587 | { | |
9291a0cd | 24588 | |
492d29ea | 24589 | TRY |
9291a0cd TT |
24590 | { |
24591 | write_psymtabs_to_index (objfile, arg); | |
24592 | } | |
492d29ea PA |
24593 | CATCH (except, RETURN_MASK_ERROR) |
24594 | { | |
24595 | exception_fprintf (gdb_stderr, except, | |
24596 | _("Error while writing index for `%s': "), | |
24597 | objfile_name (objfile)); | |
24598 | } | |
24599 | END_CATCH | |
9291a0cd TT |
24600 | } |
24601 | } | |
dce234bc PP |
24602 | } |
24603 | ||
9291a0cd TT |
24604 | \f |
24605 | ||
b4f54984 | 24606 | int dwarf_always_disassemble; |
9eae7c52 TT |
24607 | |
24608 | static void | |
b4f54984 DE |
24609 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24610 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24611 | { |
3e43a32a MS |
24612 | fprintf_filtered (file, |
24613 | _("Whether to always disassemble " | |
24614 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24615 | value); |
24616 | } | |
24617 | ||
900e11f9 JK |
24618 | static void |
24619 | show_check_physname (struct ui_file *file, int from_tty, | |
24620 | struct cmd_list_element *c, const char *value) | |
24621 | { | |
24622 | fprintf_filtered (file, | |
24623 | _("Whether to check \"physname\" is %s.\n"), | |
24624 | value); | |
24625 | } | |
24626 | ||
6502dd73 DJ |
24627 | void |
24628 | _initialize_dwarf2_read (void) | |
24629 | { | |
96d19272 JK |
24630 | struct cmd_list_element *c; |
24631 | ||
dce234bc | 24632 | dwarf2_objfile_data_key |
c1bd65d0 | 24633 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24634 | |
b4f54984 DE |
24635 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24636 | Set DWARF specific variables.\n\ | |
24637 | Configure DWARF variables such as the cache size"), | |
24638 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24639 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24640 | ||
b4f54984 DE |
24641 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24642 | Show DWARF specific variables\n\ | |
24643 | Show DWARF variables such as the cache size"), | |
24644 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24645 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24646 | ||
24647 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24648 | &dwarf_max_cache_age, _("\ |
24649 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24650 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24651 | A higher limit means that cached compilation units will be stored\n\ |
24652 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24653 | caching, which can slow down startup."), | |
2c5b56ce | 24654 | NULL, |
b4f54984 DE |
24655 | show_dwarf_max_cache_age, |
24656 | &set_dwarf_cmdlist, | |
24657 | &show_dwarf_cmdlist); | |
d97bc12b | 24658 | |
9eae7c52 | 24659 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24660 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24661 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24662 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24663 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24664 | syntax. When disabled, expressions will be printed in a more\n\ | |
24665 | conversational style, when possible."), | |
24666 | NULL, | |
b4f54984 DE |
24667 | show_dwarf_always_disassemble, |
24668 | &set_dwarf_cmdlist, | |
24669 | &show_dwarf_cmdlist); | |
24670 | ||
24671 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
24672 | Set debugging of the DWARF reader."), _("\ | |
24673 | Show debugging of the DWARF reader."), _("\ | |
24674 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
24675 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
24676 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
24677 | NULL, |
24678 | NULL, | |
24679 | &setdebuglist, &showdebuglist); | |
24680 | ||
b4f54984 DE |
24681 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24682 | Set debugging of the DWARF DIE reader."), _("\ | |
24683 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
24684 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
24685 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
24686 | NULL, |
24687 | NULL, | |
24688 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24689 | |
27e0867f DE |
24690 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24691 | Set debugging of the dwarf line reader."), _("\ | |
24692 | Show debugging of the dwarf line reader."), _("\ | |
24693 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24694 | A value of 1 (one) provides basic information.\n\ | |
24695 | A value greater than 1 provides more verbose information."), | |
24696 | NULL, | |
24697 | NULL, | |
24698 | &setdebuglist, &showdebuglist); | |
24699 | ||
900e11f9 JK |
24700 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24701 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24702 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24703 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24704 | the demangler."), | |
24705 | NULL, show_check_physname, | |
24706 | &setdebuglist, &showdebuglist); | |
24707 | ||
e615022a DE |
24708 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24709 | no_class, &use_deprecated_index_sections, _("\ | |
24710 | Set whether to use deprecated gdb_index sections."), _("\ | |
24711 | Show whether to use deprecated gdb_index sections."), _("\ | |
24712 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24713 | Normally they are ignored either because of a missing feature or\n\ | |
24714 | performance issue.\n\ | |
24715 | Warning: This option must be enabled before gdb reads the file."), | |
24716 | NULL, | |
24717 | NULL, | |
24718 | &setlist, &showlist); | |
24719 | ||
96d19272 | 24720 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 24721 | _("\ |
fc1a9d6e | 24722 | Save a gdb-index file.\n\ |
11570e71 | 24723 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
24724 | &save_cmdlist); |
24725 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
24726 | |
24727 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24728 | &dwarf2_locexpr_funcs); | |
24729 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24730 | &dwarf2_loclist_funcs); | |
24731 | ||
24732 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24733 | &dwarf2_block_frame_base_locexpr_funcs); | |
24734 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24735 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
24736 | |
24737 | #if GDB_SELF_TEST | |
24738 | selftests::register_test ("dw2_expand_symtabs_matching", | |
24739 | selftests::dw2_expand_symtabs_matching::run_test); | |
24740 | #endif | |
6502dd73 | 24741 | } |