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> | |
d8151005 | 84 | |
34eaf542 TT |
85 | typedef struct symbol *symbolp; |
86 | DEF_VEC_P (symbolp); | |
87 | ||
73be47f5 DE |
88 | /* When == 1, print basic high level tracing messages. |
89 | When > 1, be more verbose. | |
b4f54984 DE |
90 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
91 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 92 | |
d97bc12b | 93 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 94 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 95 | |
27e0867f DE |
96 | /* When non-zero, dump line number entries as they are read in. */ |
97 | static unsigned int dwarf_line_debug = 0; | |
98 | ||
900e11f9 JK |
99 | /* When non-zero, cross-check physname against demangler. */ |
100 | static int check_physname = 0; | |
101 | ||
481860b3 | 102 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 103 | static int use_deprecated_index_sections = 0; |
481860b3 | 104 | |
6502dd73 DJ |
105 | static const struct objfile_data *dwarf2_objfile_data_key; |
106 | ||
f1e6e072 TT |
107 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
108 | ||
109 | static int dwarf2_locexpr_index; | |
110 | static int dwarf2_loclist_index; | |
111 | static int dwarf2_locexpr_block_index; | |
112 | static int dwarf2_loclist_block_index; | |
113 | ||
73869dc2 DE |
114 | /* A descriptor for dwarf sections. |
115 | ||
116 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
117 | scanned. BUFFER, READIN are filled in later when the section is read. | |
118 | If the section contained compressed data then SIZE is updated to record | |
119 | the uncompressed size of the section. | |
120 | ||
121 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
122 | creating the concept of virtual sections contained within a real section. | |
123 | In DWP V2 the sections of the input DWO files are concatenated together | |
124 | into one section, but section offsets are kept relative to the original | |
125 | input section. | |
126 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
127 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
128 | describe the virtual section. */ | |
129 | ||
dce234bc PP |
130 | struct dwarf2_section_info |
131 | { | |
73869dc2 DE |
132 | union |
133 | { | |
e5aa3347 | 134 | /* If this is a real section, the bfd section. */ |
049412e3 | 135 | asection *section; |
73869dc2 | 136 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 137 | section. */ |
73869dc2 DE |
138 | struct dwarf2_section_info *containing_section; |
139 | } s; | |
19ac8c2e | 140 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 141 | const gdb_byte *buffer; |
73869dc2 | 142 | /* The size of the section, real or virtual. */ |
dce234bc | 143 | bfd_size_type size; |
73869dc2 DE |
144 | /* If this is a virtual section, the offset in the real section. |
145 | Only valid if is_virtual. */ | |
146 | bfd_size_type virtual_offset; | |
be391dca | 147 | /* True if we have tried to read this section. */ |
73869dc2 DE |
148 | char readin; |
149 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 150 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 151 | char is_virtual; |
dce234bc PP |
152 | }; |
153 | ||
8b70b953 TT |
154 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
155 | DEF_VEC_O (dwarf2_section_info_def); | |
156 | ||
9291a0cd TT |
157 | /* All offsets in the index are of this type. It must be |
158 | architecture-independent. */ | |
159 | typedef uint32_t offset_type; | |
160 | ||
161 | DEF_VEC_I (offset_type); | |
162 | ||
156942c7 DE |
163 | /* Ensure only legit values are used. */ |
164 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
165 | do { \ | |
166 | gdb_assert ((unsigned int) (value) <= 1); \ | |
167 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
168 | } while (0) | |
169 | ||
170 | /* Ensure only legit values are used. */ | |
171 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
172 | do { \ | |
173 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
174 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
175 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
176 | } while (0) | |
177 | ||
178 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
179 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
180 | do { \ | |
181 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
182 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
183 | } while (0) | |
184 | ||
9291a0cd TT |
185 | /* A description of the mapped index. The file format is described in |
186 | a comment by the code that writes the index. */ | |
187 | struct mapped_index | |
188 | { | |
559a7a62 JK |
189 | /* Index data format version. */ |
190 | int version; | |
191 | ||
9291a0cd TT |
192 | /* The total length of the buffer. */ |
193 | off_t total_size; | |
b11b1f88 | 194 | |
9291a0cd TT |
195 | /* A pointer to the address table data. */ |
196 | const gdb_byte *address_table; | |
b11b1f88 | 197 | |
9291a0cd TT |
198 | /* Size of the address table data in bytes. */ |
199 | offset_type address_table_size; | |
b11b1f88 | 200 | |
3876f04e DE |
201 | /* The symbol table, implemented as a hash table. */ |
202 | const offset_type *symbol_table; | |
b11b1f88 | 203 | |
9291a0cd | 204 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 205 | offset_type symbol_table_slots; |
b11b1f88 | 206 | |
9291a0cd TT |
207 | /* A pointer to the constant pool. */ |
208 | const char *constant_pool; | |
209 | }; | |
210 | ||
95554aad TT |
211 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
212 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
213 | ||
52059ffd TT |
214 | struct tu_stats |
215 | { | |
216 | int nr_uniq_abbrev_tables; | |
217 | int nr_symtabs; | |
218 | int nr_symtab_sharers; | |
219 | int nr_stmt_less_type_units; | |
220 | int nr_all_type_units_reallocs; | |
221 | }; | |
222 | ||
9cdd5dbd DE |
223 | /* Collection of data recorded per objfile. |
224 | This hangs off of dwarf2_objfile_data_key. */ | |
225 | ||
6502dd73 DJ |
226 | struct dwarf2_per_objfile |
227 | { | |
330cdd98 PA |
228 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
229 | dwarf2 section names, or is NULL if the standard ELF names are | |
230 | used. */ | |
231 | dwarf2_per_objfile (struct objfile *objfile, | |
232 | const dwarf2_debug_sections *names); | |
ae038cb0 | 233 | |
330cdd98 PA |
234 | ~dwarf2_per_objfile (); |
235 | ||
d6541620 | 236 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
330cdd98 PA |
237 | |
238 | /* Free all cached compilation units. */ | |
239 | void free_cached_comp_units (); | |
240 | private: | |
241 | /* This function is mapped across the sections and remembers the | |
242 | offset and size of each of the debugging sections we are | |
243 | interested in. */ | |
244 | void locate_sections (bfd *abfd, asection *sectp, | |
245 | const dwarf2_debug_sections &names); | |
246 | ||
247 | public: | |
248 | dwarf2_section_info info {}; | |
249 | dwarf2_section_info abbrev {}; | |
250 | dwarf2_section_info line {}; | |
251 | dwarf2_section_info loc {}; | |
252 | dwarf2_section_info loclists {}; | |
253 | dwarf2_section_info macinfo {}; | |
254 | dwarf2_section_info macro {}; | |
255 | dwarf2_section_info str {}; | |
256 | dwarf2_section_info line_str {}; | |
257 | dwarf2_section_info ranges {}; | |
258 | dwarf2_section_info rnglists {}; | |
259 | dwarf2_section_info addr {}; | |
260 | dwarf2_section_info frame {}; | |
261 | dwarf2_section_info eh_frame {}; | |
262 | dwarf2_section_info gdb_index {}; | |
263 | ||
264 | VEC (dwarf2_section_info_def) *types = NULL; | |
8b70b953 | 265 | |
be391dca | 266 | /* Back link. */ |
330cdd98 | 267 | struct objfile *objfile = NULL; |
be391dca | 268 | |
d467dd73 | 269 | /* Table of all the compilation units. This is used to locate |
10b3939b | 270 | the target compilation unit of a particular reference. */ |
330cdd98 | 271 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
ae038cb0 DJ |
272 | |
273 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
330cdd98 | 274 | int n_comp_units = 0; |
ae038cb0 | 275 | |
1fd400ff | 276 | /* The number of .debug_types-related CUs. */ |
330cdd98 | 277 | int n_type_units = 0; |
1fd400ff | 278 | |
6aa5f3a6 DE |
279 | /* The number of elements allocated in all_type_units. |
280 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
330cdd98 | 281 | int n_allocated_type_units = 0; |
6aa5f3a6 | 282 | |
a2ce51a0 DE |
283 | /* The .debug_types-related CUs (TUs). |
284 | This is stored in malloc space because we may realloc it. */ | |
330cdd98 | 285 | struct signatured_type **all_type_units = NULL; |
1fd400ff | 286 | |
f4dc4d17 DE |
287 | /* Table of struct type_unit_group objects. |
288 | The hash key is the DW_AT_stmt_list value. */ | |
330cdd98 | 289 | htab_t type_unit_groups {}; |
72dca2f5 | 290 | |
348e048f DE |
291 | /* A table mapping .debug_types signatures to its signatured_type entry. |
292 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
330cdd98 | 293 | htab_t signatured_types {}; |
348e048f | 294 | |
f4dc4d17 DE |
295 | /* Type unit statistics, to see how well the scaling improvements |
296 | are doing. */ | |
330cdd98 | 297 | struct tu_stats tu_stats {}; |
f4dc4d17 DE |
298 | |
299 | /* A chain of compilation units that are currently read in, so that | |
300 | they can be freed later. */ | |
330cdd98 | 301 | dwarf2_per_cu_data *read_in_chain = NULL; |
f4dc4d17 | 302 | |
3019eac3 DE |
303 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
304 | This is NULL if the table hasn't been allocated yet. */ | |
330cdd98 | 305 | htab_t dwo_files {}; |
3019eac3 | 306 | |
330cdd98 PA |
307 | /* True if we've checked for whether there is a DWP file. */ |
308 | bool dwp_checked = false; | |
80626a55 DE |
309 | |
310 | /* The DWP file if there is one, or NULL. */ | |
330cdd98 | 311 | struct dwp_file *dwp_file = NULL; |
80626a55 | 312 | |
36586728 TT |
313 | /* The shared '.dwz' file, if one exists. This is used when the |
314 | original data was compressed using 'dwz -m'. */ | |
330cdd98 | 315 | struct dwz_file *dwz_file = NULL; |
36586728 | 316 | |
330cdd98 | 317 | /* A flag indicating whether this objfile has a section loaded at a |
72dca2f5 | 318 | VMA of 0. */ |
330cdd98 | 319 | bool has_section_at_zero = false; |
9291a0cd | 320 | |
ae2de4f8 DE |
321 | /* True if we are using the mapped index, |
322 | or we are faking it for OBJF_READNOW's sake. */ | |
330cdd98 | 323 | bool using_index = false; |
9291a0cd | 324 | |
ae2de4f8 | 325 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
330cdd98 | 326 | mapped_index *index_table = NULL; |
98bfdba5 | 327 | |
7b9f3c50 | 328 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
329 | TUs typically share line table entries with a CU, so we maintain a |
330 | separate table of all line table entries to support the sharing. | |
331 | Note that while there can be way more TUs than CUs, we've already | |
332 | sorted all the TUs into "type unit groups", grouped by their | |
333 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
334 | CU and its associated TU group if there is one. */ | |
330cdd98 | 335 | htab_t quick_file_names_table {}; |
7b9f3c50 | 336 | |
98bfdba5 PA |
337 | /* Set during partial symbol reading, to prevent queueing of full |
338 | symbols. */ | |
330cdd98 | 339 | bool reading_partial_symbols = false; |
673bfd45 | 340 | |
dee91e82 | 341 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 342 | This is NULL if not allocated yet. |
02142a6c | 343 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
330cdd98 | 344 | htab_t die_type_hash {}; |
95554aad TT |
345 | |
346 | /* The CUs we recently read. */ | |
330cdd98 | 347 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
527f3840 JK |
348 | |
349 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
330cdd98 | 350 | htab_t line_header_hash {}; |
bbf2f4df PA |
351 | |
352 | /* Table containing all filenames. This is an optional because the | |
353 | table is lazily constructed on first access. */ | |
354 | gdb::optional<filename_seen_cache> filenames_cache; | |
6502dd73 DJ |
355 | }; |
356 | ||
357 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 358 | |
251d32d9 | 359 | /* Default names of the debugging sections. */ |
c906108c | 360 | |
233a11ab CS |
361 | /* Note that if the debugging section has been compressed, it might |
362 | have a name like .zdebug_info. */ | |
363 | ||
9cdd5dbd DE |
364 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
365 | { | |
251d32d9 TG |
366 | { ".debug_info", ".zdebug_info" }, |
367 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
368 | { ".debug_line", ".zdebug_line" }, | |
369 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 370 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 371 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 372 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 373 | { ".debug_str", ".zdebug_str" }, |
43988095 | 374 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 375 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 376 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 377 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 378 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
379 | { ".debug_frame", ".zdebug_frame" }, |
380 | { ".eh_frame", NULL }, | |
24d3216f TT |
381 | { ".gdb_index", ".zgdb_index" }, |
382 | 23 | |
251d32d9 | 383 | }; |
c906108c | 384 | |
80626a55 | 385 | /* List of DWO/DWP sections. */ |
3019eac3 | 386 | |
80626a55 | 387 | static const struct dwop_section_names |
3019eac3 DE |
388 | { |
389 | struct dwarf2_section_names abbrev_dwo; | |
390 | struct dwarf2_section_names info_dwo; | |
391 | struct dwarf2_section_names line_dwo; | |
392 | struct dwarf2_section_names loc_dwo; | |
43988095 | 393 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
394 | struct dwarf2_section_names macinfo_dwo; |
395 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
396 | struct dwarf2_section_names str_dwo; |
397 | struct dwarf2_section_names str_offsets_dwo; | |
398 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
399 | struct dwarf2_section_names cu_index; |
400 | struct dwarf2_section_names tu_index; | |
3019eac3 | 401 | } |
80626a55 | 402 | dwop_section_names = |
3019eac3 DE |
403 | { |
404 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
405 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
406 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
407 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 408 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
409 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
410 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
411 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
412 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
413 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
414 | { ".debug_cu_index", ".zdebug_cu_index" }, |
415 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
416 | }; |
417 | ||
c906108c SS |
418 | /* local data types */ |
419 | ||
107d2387 AC |
420 | /* The data in a compilation unit header, after target2host |
421 | translation, looks like this. */ | |
c906108c | 422 | struct comp_unit_head |
a738430d | 423 | { |
c764a876 | 424 | unsigned int length; |
a738430d | 425 | short version; |
a738430d MK |
426 | unsigned char addr_size; |
427 | unsigned char signed_addr_p; | |
9c541725 | 428 | sect_offset abbrev_sect_off; |
57349743 | 429 | |
a738430d MK |
430 | /* Size of file offsets; either 4 or 8. */ |
431 | unsigned int offset_size; | |
57349743 | 432 | |
a738430d MK |
433 | /* Size of the length field; either 4 or 12. */ |
434 | unsigned int initial_length_size; | |
57349743 | 435 | |
43988095 JK |
436 | enum dwarf_unit_type unit_type; |
437 | ||
a738430d MK |
438 | /* Offset to the first byte of this compilation unit header in the |
439 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 440 | sect_offset sect_off; |
57349743 | 441 | |
d00adf39 DE |
442 | /* Offset to first die in this cu from the start of the cu. |
443 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 444 | cu_offset first_die_cu_offset; |
43988095 JK |
445 | |
446 | /* 64-bit signature of this type unit - it is valid only for | |
447 | UNIT_TYPE DW_UT_type. */ | |
448 | ULONGEST signature; | |
449 | ||
450 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 451 | cu_offset type_cu_offset_in_tu; |
a738430d | 452 | }; |
c906108c | 453 | |
3da10d80 KS |
454 | /* Type used for delaying computation of method physnames. |
455 | See comments for compute_delayed_physnames. */ | |
456 | struct delayed_method_info | |
457 | { | |
458 | /* The type to which the method is attached, i.e., its parent class. */ | |
459 | struct type *type; | |
460 | ||
461 | /* The index of the method in the type's function fieldlists. */ | |
462 | int fnfield_index; | |
463 | ||
464 | /* The index of the method in the fieldlist. */ | |
465 | int index; | |
466 | ||
467 | /* The name of the DIE. */ | |
468 | const char *name; | |
469 | ||
470 | /* The DIE associated with this method. */ | |
471 | struct die_info *die; | |
472 | }; | |
473 | ||
474 | typedef struct delayed_method_info delayed_method_info; | |
475 | DEF_VEC_O (delayed_method_info); | |
476 | ||
e7c27a73 DJ |
477 | /* Internal state when decoding a particular compilation unit. */ |
478 | struct dwarf2_cu | |
479 | { | |
480 | /* The objfile containing this compilation unit. */ | |
481 | struct objfile *objfile; | |
482 | ||
d00adf39 | 483 | /* The header of the compilation unit. */ |
e7c27a73 | 484 | struct comp_unit_head header; |
e142c38c | 485 | |
d00adf39 DE |
486 | /* Base address of this compilation unit. */ |
487 | CORE_ADDR base_address; | |
488 | ||
489 | /* Non-zero if base_address has been set. */ | |
490 | int base_known; | |
491 | ||
e142c38c DJ |
492 | /* The language we are debugging. */ |
493 | enum language language; | |
494 | const struct language_defn *language_defn; | |
495 | ||
b0f35d58 DL |
496 | const char *producer; |
497 | ||
e142c38c DJ |
498 | /* The generic symbol table building routines have separate lists for |
499 | file scope symbols and all all other scopes (local scopes). So | |
500 | we need to select the right one to pass to add_symbol_to_list(). | |
501 | We do it by keeping a pointer to the correct list in list_in_scope. | |
502 | ||
503 | FIXME: The original dwarf code just treated the file scope as the | |
504 | first local scope, and all other local scopes as nested local | |
505 | scopes, and worked fine. Check to see if we really need to | |
506 | distinguish these in buildsym.c. */ | |
507 | struct pending **list_in_scope; | |
508 | ||
433df2d4 DE |
509 | /* The abbrev table for this CU. |
510 | Normally this points to the abbrev table in the objfile. | |
511 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
512 | struct abbrev_table *abbrev_table; | |
72bf9492 | 513 | |
b64f50a1 JK |
514 | /* Hash table holding all the loaded partial DIEs |
515 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
516 | htab_t partial_dies; |
517 | ||
518 | /* Storage for things with the same lifetime as this read-in compilation | |
519 | unit, including partial DIEs. */ | |
520 | struct obstack comp_unit_obstack; | |
521 | ||
ae038cb0 DJ |
522 | /* When multiple dwarf2_cu structures are living in memory, this field |
523 | chains them all together, so that they can be released efficiently. | |
524 | We will probably also want a generation counter so that most-recently-used | |
525 | compilation units are cached... */ | |
526 | struct dwarf2_per_cu_data *read_in_chain; | |
527 | ||
69d751e3 | 528 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
529 | struct dwarf2_per_cu_data *per_cu; |
530 | ||
531 | /* How many compilation units ago was this CU last referenced? */ | |
532 | int last_used; | |
533 | ||
b64f50a1 JK |
534 | /* A hash table of DIE cu_offset for following references with |
535 | die_info->offset.sect_off as hash. */ | |
51545339 | 536 | htab_t die_hash; |
10b3939b DJ |
537 | |
538 | /* Full DIEs if read in. */ | |
539 | struct die_info *dies; | |
540 | ||
541 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
542 | units referenced by this one. Only set during full symbol processing; | |
543 | partial symbol tables do not have dependencies. */ | |
544 | htab_t dependencies; | |
545 | ||
cb1df416 DJ |
546 | /* Header data from the line table, during full symbol processing. */ |
547 | struct line_header *line_header; | |
4c8aa72d PA |
548 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
549 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
550 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
551 | to the line header as long as this DIE is being processed. See | |
552 | process_die_scope. */ | |
553 | die_info *line_header_die_owner; | |
cb1df416 | 554 | |
3da10d80 KS |
555 | /* A list of methods which need to have physnames computed |
556 | after all type information has been read. */ | |
557 | VEC (delayed_method_info) *method_list; | |
558 | ||
96408a79 SA |
559 | /* To be copied to symtab->call_site_htab. */ |
560 | htab_t call_site_htab; | |
561 | ||
034e5797 DE |
562 | /* Non-NULL if this CU came from a DWO file. |
563 | There is an invariant here that is important to remember: | |
564 | Except for attributes copied from the top level DIE in the "main" | |
565 | (or "stub") file in preparation for reading the DWO file | |
566 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
567 | Either there isn't a DWO file (in which case this is NULL and the point | |
568 | is moot), or there is and either we're not going to read it (in which | |
569 | case this is NULL) or there is and we are reading it (in which case this | |
570 | is non-NULL). */ | |
3019eac3 DE |
571 | struct dwo_unit *dwo_unit; |
572 | ||
573 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
574 | (zero is a valid value though). | |
1dbab08b | 575 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
576 | ULONGEST addr_base; |
577 | ||
2e3cf129 DE |
578 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
579 | (zero is a valid value though). | |
1dbab08b | 580 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 581 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
582 | be used without needing to know whether DWO files are in use or not. |
583 | N.B. This does not apply to DW_AT_ranges appearing in | |
584 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
585 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
586 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
587 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
588 | ULONGEST ranges_base; |
589 | ||
ae038cb0 DJ |
590 | /* Mark used when releasing cached dies. */ |
591 | unsigned int mark : 1; | |
592 | ||
8be455d7 JK |
593 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
594 | This test is imperfect as there may exist optimized debug code not using | |
595 | any location list and still facing inlining issues if handled as | |
596 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 597 | unsigned int has_loclist : 1; |
ba919b58 | 598 | |
1b80a9fa JK |
599 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
600 | if all the producer_is_* fields are valid. This information is cached | |
601 | because profiling CU expansion showed excessive time spent in | |
602 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
603 | unsigned int checked_producer : 1; |
604 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 605 | unsigned int producer_is_gcc_lt_4_3 : 1; |
5230b05a | 606 | unsigned int producer_is_icc_lt_14 : 1; |
4d4ec4e5 TT |
607 | |
608 | /* When set, the file that we're processing is known to have | |
609 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
610 | this information, but later versions do. */ | |
611 | ||
612 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
613 | }; |
614 | ||
10b3939b DJ |
615 | /* Persistent data held for a compilation unit, even when not |
616 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 617 | read_symtab_private field of the psymtab. */ |
10b3939b | 618 | |
ae038cb0 DJ |
619 | struct dwarf2_per_cu_data |
620 | { | |
36586728 | 621 | /* The start offset and length of this compilation unit. |
45452591 | 622 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
623 | initial_length_size. |
624 | If the DIE refers to a DWO file, this is always of the original die, | |
625 | not the DWO file. */ | |
9c541725 | 626 | sect_offset sect_off; |
36586728 | 627 | unsigned int length; |
ae038cb0 | 628 | |
43988095 JK |
629 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
630 | short dwarf_version; | |
631 | ||
ae038cb0 DJ |
632 | /* Flag indicating this compilation unit will be read in before |
633 | any of the current compilation units are processed. */ | |
c764a876 | 634 | unsigned int queued : 1; |
ae038cb0 | 635 | |
0d99eb77 DE |
636 | /* This flag will be set when reading partial DIEs if we need to load |
637 | absolutely all DIEs for this compilation unit, instead of just the ones | |
638 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
639 | hash table and don't find it. */ |
640 | unsigned int load_all_dies : 1; | |
641 | ||
0186c6a7 DE |
642 | /* Non-zero if this CU is from .debug_types. |
643 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
644 | this is non-zero. */ | |
3019eac3 DE |
645 | unsigned int is_debug_types : 1; |
646 | ||
36586728 TT |
647 | /* Non-zero if this CU is from the .dwz file. */ |
648 | unsigned int is_dwz : 1; | |
649 | ||
a2ce51a0 DE |
650 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
651 | This flag is only valid if is_debug_types is true. | |
652 | We can't read a CU directly from a DWO file: There are required | |
653 | attributes in the stub. */ | |
654 | unsigned int reading_dwo_directly : 1; | |
655 | ||
7ee85ab1 DE |
656 | /* Non-zero if the TU has been read. |
657 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
658 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
659 | fetching them from random other DWOs (due to comdat folding). | |
660 | If the TU has already been read, the optimization is unnecessary | |
661 | (and unwise - we don't want to change where gdb thinks the TU lives | |
662 | "midflight"). | |
663 | This flag is only valid if is_debug_types is true. */ | |
664 | unsigned int tu_read : 1; | |
665 | ||
3019eac3 DE |
666 | /* The section this CU/TU lives in. |
667 | If the DIE refers to a DWO file, this is always the original die, | |
668 | not the DWO file. */ | |
8a0459fd | 669 | struct dwarf2_section_info *section; |
348e048f | 670 | |
17ea53c3 | 671 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
672 | of the CU cache it gets reset to NULL again. This is left as NULL for |
673 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 674 | struct dwarf2_cu *cu; |
1c379e20 | 675 | |
9cdd5dbd DE |
676 | /* The corresponding objfile. |
677 | Normally we can get the objfile from dwarf2_per_objfile. | |
678 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
679 | struct objfile *objfile; |
680 | ||
fffbe6a8 YQ |
681 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
682 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
683 | union |
684 | { | |
685 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 686 | or NULL for unread partial units. */ |
9291a0cd TT |
687 | struct partial_symtab *psymtab; |
688 | ||
689 | /* Data needed by the "quick" functions. */ | |
690 | struct dwarf2_per_cu_quick_data *quick; | |
691 | } v; | |
95554aad | 692 | |
796a7ff8 DE |
693 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
694 | while reading psymtabs, used to compute the psymtab dependencies, | |
695 | and then cleared. Then it is filled in again while reading full | |
696 | symbols, and only deleted when the objfile is destroyed. | |
697 | ||
698 | This is also used to work around a difference between the way gold | |
699 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
700 | is a gold bug. For symbols coming from TUs, gold records in the index | |
701 | the CU that includes the TU instead of the TU itself. This breaks | |
702 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
703 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
704 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
705 | we need to look in TU Z to find X. Fortunately, this is akin to | |
706 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
707 | .gdb_index version <=7 this also records the TUs that the CU referred | |
708 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
709 | indices so we only pay a price for gold generated indices. |
710 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 711 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
712 | }; |
713 | ||
348e048f DE |
714 | /* Entry in the signatured_types hash table. */ |
715 | ||
716 | struct signatured_type | |
717 | { | |
42e7ad6c | 718 | /* The "per_cu" object of this type. |
ac9ec31b | 719 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
720 | N.B.: This is the first member so that it's easy to convert pointers |
721 | between them. */ | |
722 | struct dwarf2_per_cu_data per_cu; | |
723 | ||
3019eac3 | 724 | /* The type's signature. */ |
348e048f DE |
725 | ULONGEST signature; |
726 | ||
3019eac3 | 727 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
728 | If this TU is a DWO stub and the definition lives in a DWO file |
729 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
730 | cu_offset type_offset_in_tu; |
731 | ||
732 | /* Offset in the section of the type's DIE. | |
733 | If the definition lives in a DWO file, this is the offset in the | |
734 | .debug_types.dwo section. | |
735 | The value is zero until the actual value is known. | |
736 | Zero is otherwise not a valid section offset. */ | |
737 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
738 | |
739 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
740 | can share them. This points to the containing symtab. */ | |
741 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
742 | |
743 | /* The type. | |
744 | The first time we encounter this type we fully read it in and install it | |
745 | in the symbol tables. Subsequent times we only need the type. */ | |
746 | struct type *type; | |
a2ce51a0 DE |
747 | |
748 | /* Containing DWO unit. | |
749 | This field is valid iff per_cu.reading_dwo_directly. */ | |
750 | struct dwo_unit *dwo_unit; | |
348e048f DE |
751 | }; |
752 | ||
0186c6a7 DE |
753 | typedef struct signatured_type *sig_type_ptr; |
754 | DEF_VEC_P (sig_type_ptr); | |
755 | ||
094b34ac DE |
756 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
757 | This includes type_unit_group and quick_file_names. */ | |
758 | ||
759 | struct stmt_list_hash | |
760 | { | |
761 | /* The DWO unit this table is from or NULL if there is none. */ | |
762 | struct dwo_unit *dwo_unit; | |
763 | ||
764 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 765 | sect_offset line_sect_off; |
094b34ac DE |
766 | }; |
767 | ||
f4dc4d17 DE |
768 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
769 | an object of this type. */ | |
770 | ||
771 | struct type_unit_group | |
772 | { | |
0186c6a7 | 773 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
774 | To simplify things we create an artificial CU that "includes" all the |
775 | type units using this stmt_list so that the rest of the code still has | |
776 | a "per_cu" handle on the symtab. | |
777 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 778 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
779 | struct dwarf2_per_cu_data per_cu; |
780 | ||
0186c6a7 DE |
781 | /* The TUs that share this DW_AT_stmt_list entry. |
782 | This is added to while parsing type units to build partial symtabs, | |
783 | and is deleted afterwards and not used again. */ | |
784 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 785 | |
43f3e411 | 786 | /* The compunit symtab. |
094b34ac | 787 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
788 | so we create an essentially anonymous symtab as the compunit symtab. */ |
789 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 790 | |
094b34ac DE |
791 | /* The data used to construct the hash key. */ |
792 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
793 | |
794 | /* The number of symtabs from the line header. | |
795 | The value here must match line_header.num_file_names. */ | |
796 | unsigned int num_symtabs; | |
797 | ||
798 | /* The symbol tables for this TU (obtained from the files listed in | |
799 | DW_AT_stmt_list). | |
800 | WARNING: The order of entries here must match the order of entries | |
801 | in the line header. After the first TU using this type_unit_group, the | |
802 | line header for the subsequent TUs is recreated from this. This is done | |
803 | because we need to use the same symtabs for each TU using the same | |
804 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
805 | there's no guarantee the line header doesn't have duplicate entries. */ | |
806 | struct symtab **symtabs; | |
807 | }; | |
808 | ||
73869dc2 | 809 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
810 | |
811 | struct dwo_sections | |
812 | { | |
813 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
814 | struct dwarf2_section_info line; |
815 | struct dwarf2_section_info loc; | |
43988095 | 816 | struct dwarf2_section_info loclists; |
09262596 DE |
817 | struct dwarf2_section_info macinfo; |
818 | struct dwarf2_section_info macro; | |
3019eac3 DE |
819 | struct dwarf2_section_info str; |
820 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
821 | /* In the case of a virtual DWO file, these two are unused. */ |
822 | struct dwarf2_section_info info; | |
3019eac3 DE |
823 | VEC (dwarf2_section_info_def) *types; |
824 | }; | |
825 | ||
c88ee1f0 | 826 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
827 | |
828 | struct dwo_unit | |
829 | { | |
830 | /* Backlink to the containing struct dwo_file. */ | |
831 | struct dwo_file *dwo_file; | |
832 | ||
833 | /* The "id" that distinguishes this CU/TU. | |
834 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
835 | Since signatures came first, we stick with it for consistency. */ | |
836 | ULONGEST signature; | |
837 | ||
838 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 839 | struct dwarf2_section_info *section; |
3019eac3 | 840 | |
9c541725 PA |
841 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
842 | sect_offset sect_off; | |
3019eac3 DE |
843 | unsigned int length; |
844 | ||
845 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
846 | cu_offset type_offset_in_tu; | |
847 | }; | |
848 | ||
73869dc2 DE |
849 | /* include/dwarf2.h defines the DWP section codes. |
850 | It defines a max value but it doesn't define a min value, which we | |
851 | use for error checking, so provide one. */ | |
852 | ||
853 | enum dwp_v2_section_ids | |
854 | { | |
855 | DW_SECT_MIN = 1 | |
856 | }; | |
857 | ||
80626a55 | 858 | /* Data for one DWO file. |
57d63ce2 DE |
859 | |
860 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
861 | appears in a DWP file). DWP files don't really have DWO files per se - | |
862 | comdat folding of types "loses" the DWO file they came from, and from | |
863 | a high level view DWP files appear to contain a mass of random types. | |
864 | However, to maintain consistency with the non-DWP case we pretend DWP | |
865 | files contain virtual DWO files, and we assign each TU with one virtual | |
866 | DWO file (generally based on the line and abbrev section offsets - | |
867 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
868 | |
869 | struct dwo_file | |
870 | { | |
0ac5b59e | 871 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
872 | For virtual DWO files the name is constructed from the section offsets |
873 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
874 | from related CU+TUs. */ | |
0ac5b59e DE |
875 | const char *dwo_name; |
876 | ||
877 | /* The DW_AT_comp_dir attribute. */ | |
878 | const char *comp_dir; | |
3019eac3 | 879 | |
80626a55 DE |
880 | /* The bfd, when the file is open. Otherwise this is NULL. |
881 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
882 | bfd *dbfd; | |
3019eac3 | 883 | |
73869dc2 DE |
884 | /* The sections that make up this DWO file. |
885 | Remember that for virtual DWO files in DWP V2, these are virtual | |
886 | sections (for lack of a better name). */ | |
3019eac3 DE |
887 | struct dwo_sections sections; |
888 | ||
33c5cd75 DB |
889 | /* The CUs in the file. |
890 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
891 | an extension to handle LLVM's Link Time Optimization output (where | |
892 | multiple source files may be compiled into a single object/dwo pair). */ | |
893 | htab_t cus; | |
3019eac3 DE |
894 | |
895 | /* Table of TUs in the file. | |
896 | Each element is a struct dwo_unit. */ | |
897 | htab_t tus; | |
898 | }; | |
899 | ||
80626a55 DE |
900 | /* These sections are what may appear in a DWP file. */ |
901 | ||
902 | struct dwp_sections | |
903 | { | |
73869dc2 | 904 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
905 | struct dwarf2_section_info str; |
906 | struct dwarf2_section_info cu_index; | |
907 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
908 | |
909 | /* These are only used by DWP version 2 files. | |
910 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
911 | sections are referenced by section number, and are not recorded here. | |
912 | In DWP version 2 there is at most one copy of all these sections, each | |
913 | section being (effectively) comprised of the concatenation of all of the | |
914 | individual sections that exist in the version 1 format. | |
915 | To keep the code simple we treat each of these concatenated pieces as a | |
916 | section itself (a virtual section?). */ | |
917 | struct dwarf2_section_info abbrev; | |
918 | struct dwarf2_section_info info; | |
919 | struct dwarf2_section_info line; | |
920 | struct dwarf2_section_info loc; | |
921 | struct dwarf2_section_info macinfo; | |
922 | struct dwarf2_section_info macro; | |
923 | struct dwarf2_section_info str_offsets; | |
924 | struct dwarf2_section_info types; | |
80626a55 DE |
925 | }; |
926 | ||
73869dc2 DE |
927 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
928 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 929 | |
73869dc2 | 930 | struct virtual_v1_dwo_sections |
80626a55 DE |
931 | { |
932 | struct dwarf2_section_info abbrev; | |
933 | struct dwarf2_section_info line; | |
934 | struct dwarf2_section_info loc; | |
935 | struct dwarf2_section_info macinfo; | |
936 | struct dwarf2_section_info macro; | |
937 | struct dwarf2_section_info str_offsets; | |
938 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 939 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
940 | struct dwarf2_section_info info_or_types; |
941 | }; | |
942 | ||
73869dc2 DE |
943 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
944 | In version 2, the sections of the DWO files are concatenated together | |
945 | and stored in one section of that name. Thus each ELF section contains | |
946 | several "virtual" sections. */ | |
947 | ||
948 | struct virtual_v2_dwo_sections | |
949 | { | |
950 | bfd_size_type abbrev_offset; | |
951 | bfd_size_type abbrev_size; | |
952 | ||
953 | bfd_size_type line_offset; | |
954 | bfd_size_type line_size; | |
955 | ||
956 | bfd_size_type loc_offset; | |
957 | bfd_size_type loc_size; | |
958 | ||
959 | bfd_size_type macinfo_offset; | |
960 | bfd_size_type macinfo_size; | |
961 | ||
962 | bfd_size_type macro_offset; | |
963 | bfd_size_type macro_size; | |
964 | ||
965 | bfd_size_type str_offsets_offset; | |
966 | bfd_size_type str_offsets_size; | |
967 | ||
968 | /* Each DWP hash table entry records one CU or one TU. | |
969 | That is recorded here, and copied to dwo_unit.section. */ | |
970 | bfd_size_type info_or_types_offset; | |
971 | bfd_size_type info_or_types_size; | |
972 | }; | |
973 | ||
80626a55 DE |
974 | /* Contents of DWP hash tables. */ |
975 | ||
976 | struct dwp_hash_table | |
977 | { | |
73869dc2 | 978 | uint32_t version, nr_columns; |
80626a55 | 979 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
980 | const gdb_byte *hash_table, *unit_table; |
981 | union | |
982 | { | |
983 | struct | |
984 | { | |
985 | const gdb_byte *indices; | |
986 | } v1; | |
987 | struct | |
988 | { | |
989 | /* This is indexed by column number and gives the id of the section | |
990 | in that column. */ | |
991 | #define MAX_NR_V2_DWO_SECTIONS \ | |
992 | (1 /* .debug_info or .debug_types */ \ | |
993 | + 1 /* .debug_abbrev */ \ | |
994 | + 1 /* .debug_line */ \ | |
995 | + 1 /* .debug_loc */ \ | |
996 | + 1 /* .debug_str_offsets */ \ | |
997 | + 1 /* .debug_macro or .debug_macinfo */) | |
998 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
999 | const gdb_byte *offsets; | |
1000 | const gdb_byte *sizes; | |
1001 | } v2; | |
1002 | } section_pool; | |
80626a55 DE |
1003 | }; |
1004 | ||
1005 | /* Data for one DWP file. */ | |
1006 | ||
1007 | struct dwp_file | |
1008 | { | |
1009 | /* Name of the file. */ | |
1010 | const char *name; | |
1011 | ||
73869dc2 DE |
1012 | /* File format version. */ |
1013 | int version; | |
1014 | ||
93417882 | 1015 | /* The bfd. */ |
80626a55 DE |
1016 | bfd *dbfd; |
1017 | ||
1018 | /* Section info for this file. */ | |
1019 | struct dwp_sections sections; | |
1020 | ||
57d63ce2 | 1021 | /* Table of CUs in the file. */ |
80626a55 DE |
1022 | const struct dwp_hash_table *cus; |
1023 | ||
1024 | /* Table of TUs in the file. */ | |
1025 | const struct dwp_hash_table *tus; | |
1026 | ||
19ac8c2e DE |
1027 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
1028 | htab_t loaded_cus; | |
1029 | htab_t loaded_tus; | |
80626a55 | 1030 | |
73869dc2 DE |
1031 | /* Table to map ELF section numbers to their sections. |
1032 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
1033 | unsigned int num_sections; |
1034 | asection **elf_sections; | |
1035 | }; | |
1036 | ||
36586728 TT |
1037 | /* This represents a '.dwz' file. */ |
1038 | ||
1039 | struct dwz_file | |
1040 | { | |
1041 | /* A dwz file can only contain a few sections. */ | |
1042 | struct dwarf2_section_info abbrev; | |
1043 | struct dwarf2_section_info info; | |
1044 | struct dwarf2_section_info str; | |
1045 | struct dwarf2_section_info line; | |
1046 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 1047 | struct dwarf2_section_info gdb_index; |
36586728 TT |
1048 | |
1049 | /* The dwz's BFD. */ | |
1050 | bfd *dwz_bfd; | |
1051 | }; | |
1052 | ||
0963b4bd MS |
1053 | /* Struct used to pass misc. parameters to read_die_and_children, et |
1054 | al. which are used for both .debug_info and .debug_types dies. | |
1055 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 1056 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
1057 | |
1058 | struct die_reader_specs | |
1059 | { | |
a32a8923 | 1060 | /* The bfd of die_section. */ |
93311388 DE |
1061 | bfd* abfd; |
1062 | ||
1063 | /* The CU of the DIE we are parsing. */ | |
1064 | struct dwarf2_cu *cu; | |
1065 | ||
80626a55 | 1066 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1067 | struct dwo_file *dwo_file; |
1068 | ||
dee91e82 | 1069 | /* The section the die comes from. |
3019eac3 | 1070 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1071 | struct dwarf2_section_info *die_section; |
1072 | ||
1073 | /* die_section->buffer. */ | |
d521ce57 | 1074 | const gdb_byte *buffer; |
f664829e DE |
1075 | |
1076 | /* The end of the buffer. */ | |
1077 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1078 | |
1079 | /* The value of the DW_AT_comp_dir attribute. */ | |
1080 | const char *comp_dir; | |
93311388 DE |
1081 | }; |
1082 | ||
fd820528 | 1083 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1084 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1085 | const gdb_byte *info_ptr, |
dee91e82 DE |
1086 | struct die_info *comp_unit_die, |
1087 | int has_children, | |
1088 | void *data); | |
1089 | ||
ecfb656c PA |
1090 | /* A 1-based directory index. This is a strong typedef to prevent |
1091 | accidentally using a directory index as a 0-based index into an | |
1092 | array/vector. */ | |
1093 | enum class dir_index : unsigned int {}; | |
1094 | ||
1095 | /* Likewise, a 1-based file name index. */ | |
1096 | enum class file_name_index : unsigned int {}; | |
1097 | ||
52059ffd TT |
1098 | struct file_entry |
1099 | { | |
fff8551c PA |
1100 | file_entry () = default; |
1101 | ||
ecfb656c | 1102 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
1103 | unsigned int mod_time_, unsigned int length_) |
1104 | : name (name_), | |
ecfb656c | 1105 | d_index (d_index_), |
fff8551c PA |
1106 | mod_time (mod_time_), |
1107 | length (length_) | |
1108 | {} | |
1109 | ||
ecfb656c PA |
1110 | /* Return the include directory at D_INDEX stored in LH. Returns |
1111 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
1112 | const char *include_dir (const line_header *lh) const; |
1113 | ||
fff8551c PA |
1114 | /* The file name. Note this is an observing pointer. The memory is |
1115 | owned by debug_line_buffer. */ | |
1116 | const char *name {}; | |
1117 | ||
8c43009f | 1118 | /* The directory index (1-based). */ |
ecfb656c | 1119 | dir_index d_index {}; |
fff8551c PA |
1120 | |
1121 | unsigned int mod_time {}; | |
1122 | ||
1123 | unsigned int length {}; | |
1124 | ||
1125 | /* True if referenced by the Line Number Program. */ | |
1126 | bool included_p {}; | |
1127 | ||
83769d0b | 1128 | /* The associated symbol table, if any. */ |
fff8551c | 1129 | struct symtab *symtab {}; |
52059ffd TT |
1130 | }; |
1131 | ||
debd256d JB |
1132 | /* The line number information for a compilation unit (found in the |
1133 | .debug_line section) begins with a "statement program header", | |
1134 | which contains the following information. */ | |
1135 | struct line_header | |
1136 | { | |
fff8551c PA |
1137 | line_header () |
1138 | : offset_in_dwz {} | |
1139 | {} | |
1140 | ||
1141 | /* Add an entry to the include directory table. */ | |
1142 | void add_include_dir (const char *include_dir); | |
1143 | ||
1144 | /* Add an entry to the file name table. */ | |
ecfb656c | 1145 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
1146 | unsigned int mod_time, unsigned int length); |
1147 | ||
ecfb656c | 1148 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1149 | is out of bounds. */ |
ecfb656c | 1150 | const char *include_dir_at (dir_index index) const |
8c43009f | 1151 | { |
ecfb656c PA |
1152 | /* Convert directory index number (1-based) to vector index |
1153 | (0-based). */ | |
1154 | size_t vec_index = to_underlying (index) - 1; | |
1155 | ||
1156 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 1157 | return NULL; |
ecfb656c | 1158 | return include_dirs[vec_index]; |
8c43009f PA |
1159 | } |
1160 | ||
ecfb656c | 1161 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 1162 | is out of bounds. */ |
ecfb656c | 1163 | file_entry *file_name_at (file_name_index index) |
8c43009f | 1164 | { |
ecfb656c PA |
1165 | /* Convert file name index number (1-based) to vector index |
1166 | (0-based). */ | |
1167 | size_t vec_index = to_underlying (index) - 1; | |
1168 | ||
1169 | if (vec_index >= file_names.size ()) | |
fff8551c | 1170 | return NULL; |
ecfb656c | 1171 | return &file_names[vec_index]; |
fff8551c PA |
1172 | } |
1173 | ||
1174 | /* Const version of the above. */ | |
1175 | const file_entry *file_name_at (unsigned int index) const | |
1176 | { | |
1177 | if (index >= file_names.size ()) | |
8c43009f PA |
1178 | return NULL; |
1179 | return &file_names[index]; | |
1180 | } | |
1181 | ||
527f3840 | 1182 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1183 | sect_offset sect_off {}; |
527f3840 JK |
1184 | |
1185 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1186 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1187 | ||
1188 | unsigned int total_length {}; | |
1189 | unsigned short version {}; | |
1190 | unsigned int header_length {}; | |
1191 | unsigned char minimum_instruction_length {}; | |
1192 | unsigned char maximum_ops_per_instruction {}; | |
1193 | unsigned char default_is_stmt {}; | |
1194 | int line_base {}; | |
1195 | unsigned char line_range {}; | |
1196 | unsigned char opcode_base {}; | |
debd256d JB |
1197 | |
1198 | /* standard_opcode_lengths[i] is the number of operands for the | |
1199 | standard opcode whose value is i. This means that | |
1200 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1201 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1202 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1203 | |
fff8551c PA |
1204 | /* The include_directories table. Note these are observing |
1205 | pointers. The memory is owned by debug_line_buffer. */ | |
1206 | std::vector<const char *> include_dirs; | |
debd256d | 1207 | |
fff8551c PA |
1208 | /* The file_names table. */ |
1209 | std::vector<file_entry> file_names; | |
debd256d JB |
1210 | |
1211 | /* The start and end of the statement program following this | |
6502dd73 | 1212 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1213 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1214 | }; |
c906108c | 1215 | |
fff8551c PA |
1216 | typedef std::unique_ptr<line_header> line_header_up; |
1217 | ||
8c43009f PA |
1218 | const char * |
1219 | file_entry::include_dir (const line_header *lh) const | |
1220 | { | |
ecfb656c | 1221 | return lh->include_dir_at (d_index); |
8c43009f PA |
1222 | } |
1223 | ||
c906108c | 1224 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1225 | need this much information. */ |
c906108c SS |
1226 | struct partial_die_info |
1227 | { | |
72bf9492 | 1228 | /* Offset of this DIE. */ |
9c541725 | 1229 | sect_offset sect_off; |
72bf9492 DJ |
1230 | |
1231 | /* DWARF-2 tag for this DIE. */ | |
1232 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1233 | ||
72bf9492 DJ |
1234 | /* Assorted flags describing the data found in this DIE. */ |
1235 | unsigned int has_children : 1; | |
1236 | unsigned int is_external : 1; | |
1237 | unsigned int is_declaration : 1; | |
1238 | unsigned int has_type : 1; | |
1239 | unsigned int has_specification : 1; | |
1240 | unsigned int has_pc_info : 1; | |
481860b3 | 1241 | unsigned int may_be_inlined : 1; |
72bf9492 | 1242 | |
0c1b455e TT |
1243 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1244 | unsigned int main_subprogram : 1; | |
1245 | ||
72bf9492 DJ |
1246 | /* Flag set if the SCOPE field of this structure has been |
1247 | computed. */ | |
1248 | unsigned int scope_set : 1; | |
1249 | ||
fa4028e9 JB |
1250 | /* Flag set if the DIE has a byte_size attribute. */ |
1251 | unsigned int has_byte_size : 1; | |
1252 | ||
ff908ebf AW |
1253 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1254 | unsigned int has_const_value : 1; | |
1255 | ||
98bfdba5 PA |
1256 | /* Flag set if any of the DIE's children are template arguments. */ |
1257 | unsigned int has_template_arguments : 1; | |
1258 | ||
abc72ce4 DE |
1259 | /* Flag set if fixup_partial_die has been called on this die. */ |
1260 | unsigned int fixup_called : 1; | |
1261 | ||
36586728 TT |
1262 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1263 | unsigned int is_dwz : 1; | |
1264 | ||
1265 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1266 | unsigned int spec_is_dwz : 1; | |
1267 | ||
72bf9492 | 1268 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1269 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1270 | const char *name; |
72bf9492 | 1271 | |
abc72ce4 DE |
1272 | /* The linkage name, if present. */ |
1273 | const char *linkage_name; | |
1274 | ||
72bf9492 DJ |
1275 | /* The scope to prepend to our children. This is generally |
1276 | allocated on the comp_unit_obstack, so will disappear | |
1277 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1278 | const char *scope; |
72bf9492 | 1279 | |
95554aad TT |
1280 | /* Some data associated with the partial DIE. The tag determines |
1281 | which field is live. */ | |
1282 | union | |
1283 | { | |
1284 | /* The location description associated with this DIE, if any. */ | |
1285 | struct dwarf_block *locdesc; | |
1286 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1287 | sect_offset sect_off; |
95554aad | 1288 | } d; |
72bf9492 DJ |
1289 | |
1290 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1291 | CORE_ADDR lowpc; |
1292 | CORE_ADDR highpc; | |
72bf9492 | 1293 | |
93311388 | 1294 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1295 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1296 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1297 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1298 | const gdb_byte *sibling; |
72bf9492 DJ |
1299 | |
1300 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1301 | DW_AT_specification (or DW_AT_abstract_origin or | |
1302 | DW_AT_extension). */ | |
b64f50a1 | 1303 | sect_offset spec_offset; |
72bf9492 DJ |
1304 | |
1305 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1306 | if any. */ | |
1307 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1308 | }; |
1309 | ||
0963b4bd | 1310 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1311 | struct abbrev_info |
1312 | { | |
1313 | unsigned int number; /* number identifying abbrev */ | |
1314 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1315 | unsigned short has_children; /* boolean */ |
1316 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1317 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1318 | struct abbrev_info *next; /* next in chain */ | |
1319 | }; | |
1320 | ||
1321 | struct attr_abbrev | |
1322 | { | |
9d25dd43 DE |
1323 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1324 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1325 | |
1326 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1327 | LONGEST implicit_const; | |
c906108c SS |
1328 | }; |
1329 | ||
433df2d4 DE |
1330 | /* Size of abbrev_table.abbrev_hash_table. */ |
1331 | #define ABBREV_HASH_SIZE 121 | |
1332 | ||
1333 | /* Top level data structure to contain an abbreviation table. */ | |
1334 | ||
1335 | struct abbrev_table | |
1336 | { | |
f4dc4d17 DE |
1337 | /* Where the abbrev table came from. |
1338 | This is used as a sanity check when the table is used. */ | |
9c541725 | 1339 | sect_offset sect_off; |
433df2d4 DE |
1340 | |
1341 | /* Storage for the abbrev table. */ | |
1342 | struct obstack abbrev_obstack; | |
1343 | ||
1344 | /* Hash table of abbrevs. | |
1345 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1346 | It could be statically allocated, but the previous code didn't so we | |
1347 | don't either. */ | |
1348 | struct abbrev_info **abbrevs; | |
1349 | }; | |
1350 | ||
0963b4bd | 1351 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1352 | struct attribute |
1353 | { | |
9d25dd43 | 1354 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1355 | ENUM_BITFIELD(dwarf_form) form : 15; |
1356 | ||
1357 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1358 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1359 | here for better struct attribute alignment. */ | |
1360 | unsigned int string_is_canonical : 1; | |
1361 | ||
b60c80d6 DJ |
1362 | union |
1363 | { | |
15d034d0 | 1364 | const char *str; |
b60c80d6 | 1365 | struct dwarf_block *blk; |
43bbcdc2 PH |
1366 | ULONGEST unsnd; |
1367 | LONGEST snd; | |
b60c80d6 | 1368 | CORE_ADDR addr; |
ac9ec31b | 1369 | ULONGEST signature; |
b60c80d6 DJ |
1370 | } |
1371 | u; | |
1372 | }; | |
1373 | ||
0963b4bd | 1374 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1375 | struct die_info |
1376 | { | |
76815b17 DE |
1377 | /* DWARF-2 tag for this DIE. */ |
1378 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1379 | ||
1380 | /* Number of attributes */ | |
98bfdba5 PA |
1381 | unsigned char num_attrs; |
1382 | ||
1383 | /* True if we're presently building the full type name for the | |
1384 | type derived from this DIE. */ | |
1385 | unsigned char building_fullname : 1; | |
76815b17 | 1386 | |
adde2bff DE |
1387 | /* True if this die is in process. PR 16581. */ |
1388 | unsigned char in_process : 1; | |
1389 | ||
76815b17 DE |
1390 | /* Abbrev number */ |
1391 | unsigned int abbrev; | |
1392 | ||
93311388 | 1393 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1394 | sect_offset sect_off; |
78ba4af6 JB |
1395 | |
1396 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1397 | points to this die's parent; CHILD points to the first child of | |
1398 | this node; and all the children of a given node are chained | |
4950bc1c | 1399 | together via their SIBLING fields. */ |
639d11d3 DC |
1400 | struct die_info *child; /* Its first child, if any. */ |
1401 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1402 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1403 | |
b60c80d6 DJ |
1404 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1405 | zero, but it's not common and zero-sized arrays are not | |
1406 | sufficiently portable C. */ | |
1407 | struct attribute attrs[1]; | |
c906108c SS |
1408 | }; |
1409 | ||
0963b4bd | 1410 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1411 | |
1412 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1413 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1414 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1415 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1416 | #define DW_SND(attr) ((attr)->u.snd) | |
1417 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1418 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1419 | |
0963b4bd | 1420 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1421 | struct dwarf_block |
1422 | { | |
56eb65bd | 1423 | size_t size; |
1d6edc3c JK |
1424 | |
1425 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1426 | const gdb_byte *data; |
c906108c SS |
1427 | }; |
1428 | ||
c906108c SS |
1429 | #ifndef ATTR_ALLOC_CHUNK |
1430 | #define ATTR_ALLOC_CHUNK 4 | |
1431 | #endif | |
1432 | ||
c906108c SS |
1433 | /* Allocate fields for structs, unions and enums in this size. */ |
1434 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1435 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1436 | #endif | |
1437 | ||
c906108c SS |
1438 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1439 | but this would require a corresponding change in unpack_field_as_long | |
1440 | and friends. */ | |
1441 | static int bits_per_byte = 8; | |
1442 | ||
52059ffd TT |
1443 | struct nextfield |
1444 | { | |
1445 | struct nextfield *next; | |
1446 | int accessibility; | |
1447 | int virtuality; | |
1448 | struct field field; | |
1449 | }; | |
1450 | ||
1451 | struct nextfnfield | |
1452 | { | |
1453 | struct nextfnfield *next; | |
1454 | struct fn_field fnfield; | |
1455 | }; | |
1456 | ||
1457 | struct fnfieldlist | |
1458 | { | |
1459 | const char *name; | |
1460 | int length; | |
1461 | struct nextfnfield *head; | |
1462 | }; | |
1463 | ||
1464 | struct typedef_field_list | |
1465 | { | |
1466 | struct typedef_field field; | |
1467 | struct typedef_field_list *next; | |
1468 | }; | |
1469 | ||
c906108c SS |
1470 | /* The routines that read and process dies for a C struct or C++ class |
1471 | pass lists of data member fields and lists of member function fields | |
1472 | in an instance of a field_info structure, as defined below. */ | |
1473 | struct field_info | |
c5aa993b | 1474 | { |
0963b4bd | 1475 | /* List of data member and baseclasses fields. */ |
52059ffd | 1476 | struct nextfield *fields, *baseclasses; |
c906108c | 1477 | |
7d0ccb61 | 1478 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1479 | int nfields; |
c906108c | 1480 | |
c5aa993b JM |
1481 | /* Number of baseclasses. */ |
1482 | int nbaseclasses; | |
c906108c | 1483 | |
c5aa993b JM |
1484 | /* Set if the accesibility of one of the fields is not public. */ |
1485 | int non_public_fields; | |
c906108c | 1486 | |
c5aa993b JM |
1487 | /* Member function fieldlist array, contains name of possibly overloaded |
1488 | member function, number of overloaded member functions and a pointer | |
1489 | to the head of the member function field chain. */ | |
52059ffd | 1490 | struct fnfieldlist *fnfieldlists; |
c906108c | 1491 | |
c5aa993b JM |
1492 | /* Number of entries in the fnfieldlists array. */ |
1493 | int nfnfields; | |
98751a41 JK |
1494 | |
1495 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1496 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1497 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1498 | unsigned typedef_field_list_count; |
c5aa993b | 1499 | }; |
c906108c | 1500 | |
10b3939b DJ |
1501 | /* One item on the queue of compilation units to read in full symbols |
1502 | for. */ | |
1503 | struct dwarf2_queue_item | |
1504 | { | |
1505 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1506 | enum language pretend_language; |
10b3939b DJ |
1507 | struct dwarf2_queue_item *next; |
1508 | }; | |
1509 | ||
1510 | /* The current queue. */ | |
1511 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1512 | ||
ae038cb0 DJ |
1513 | /* Loaded secondary compilation units are kept in memory until they |
1514 | have not been referenced for the processing of this many | |
1515 | compilation units. Set this to zero to disable caching. Cache | |
1516 | sizes of up to at least twenty will improve startup time for | |
1517 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1518 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1519 | static void |
b4f54984 DE |
1520 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1521 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1522 | { |
3e43a32a | 1523 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1524 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1525 | value); |
1526 | } | |
4390d890 | 1527 | \f |
c906108c SS |
1528 | /* local function prototypes */ |
1529 | ||
a32a8923 DE |
1530 | static const char *get_section_name (const struct dwarf2_section_info *); |
1531 | ||
1532 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1533 | ||
918dd910 JK |
1534 | static void dwarf2_find_base_address (struct die_info *die, |
1535 | struct dwarf2_cu *cu); | |
1536 | ||
0018ea6f DE |
1537 | static struct partial_symtab *create_partial_symtab |
1538 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1539 | ||
f1902523 JK |
1540 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1541 | const gdb_byte *info_ptr, | |
1542 | struct die_info *type_unit_die, | |
1543 | int has_children, void *data); | |
1544 | ||
c67a9c90 | 1545 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1546 | |
72bf9492 DJ |
1547 | static void scan_partial_symbols (struct partial_die_info *, |
1548 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1549 | int, struct dwarf2_cu *); |
c906108c | 1550 | |
72bf9492 DJ |
1551 | static void add_partial_symbol (struct partial_die_info *, |
1552 | struct dwarf2_cu *); | |
63d06c5c | 1553 | |
72bf9492 DJ |
1554 | static void add_partial_namespace (struct partial_die_info *pdi, |
1555 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1556 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1557 | |
5d7cb8df | 1558 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1559 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1560 | struct dwarf2_cu *cu); |
1561 | ||
72bf9492 DJ |
1562 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1563 | struct dwarf2_cu *cu); | |
91c24f0a | 1564 | |
bc30ff58 JB |
1565 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1566 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1567 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1568 | |
257e7a09 YQ |
1569 | static void dwarf2_read_symtab (struct partial_symtab *, |
1570 | struct objfile *); | |
c906108c | 1571 | |
a14ed312 | 1572 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1573 | |
433df2d4 DE |
1574 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1575 | (const struct abbrev_table *, unsigned int); | |
1576 | ||
1577 | static struct abbrev_table *abbrev_table_read_table | |
1578 | (struct dwarf2_section_info *, sect_offset); | |
1579 | ||
1580 | static void abbrev_table_free (struct abbrev_table *); | |
1581 | ||
f4dc4d17 DE |
1582 | static void abbrev_table_free_cleanup (void *); |
1583 | ||
dee91e82 DE |
1584 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1585 | struct dwarf2_section_info *); | |
c906108c | 1586 | |
f3dd6933 | 1587 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1588 | |
d521ce57 | 1589 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1590 | |
dee91e82 | 1591 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1592 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1593 | |
d521ce57 TT |
1594 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1595 | struct partial_die_info *, | |
1596 | struct abbrev_info *, | |
1597 | unsigned int, | |
1598 | const gdb_byte *); | |
c906108c | 1599 | |
36586728 | 1600 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1601 | struct dwarf2_cu *); |
72bf9492 DJ |
1602 | |
1603 | static void fixup_partial_die (struct partial_die_info *, | |
1604 | struct dwarf2_cu *); | |
1605 | ||
d521ce57 TT |
1606 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1607 | struct attribute *, struct attr_abbrev *, | |
1608 | const gdb_byte *); | |
a8329558 | 1609 | |
a1855c1d | 1610 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1611 | |
a1855c1d | 1612 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1613 | |
a1855c1d | 1614 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1615 | |
a1855c1d | 1616 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1617 | |
a1855c1d | 1618 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1619 | |
d521ce57 | 1620 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1621 | unsigned int *); |
c906108c | 1622 | |
d521ce57 | 1623 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1624 | |
1625 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1626 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1627 | unsigned int *, unsigned int *); |
613e1657 | 1628 | |
d521ce57 TT |
1629 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1630 | const struct comp_unit_head *, | |
c764a876 DE |
1631 | unsigned int *); |
1632 | ||
d521ce57 | 1633 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1634 | |
f4dc4d17 DE |
1635 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1636 | sect_offset); | |
1637 | ||
d521ce57 | 1638 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1639 | |
d521ce57 | 1640 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1641 | |
d521ce57 TT |
1642 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1643 | const struct comp_unit_head *, | |
1644 | unsigned int *); | |
4bdf3d34 | 1645 | |
43988095 JK |
1646 | static const char *read_indirect_line_string (bfd *, const gdb_byte *, |
1647 | const struct comp_unit_head *, | |
1648 | unsigned int *); | |
36586728 | 1649 | |
43988095 | 1650 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
c906108c | 1651 | |
d521ce57 | 1652 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1653 | |
d521ce57 TT |
1654 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1655 | const gdb_byte *, | |
3019eac3 DE |
1656 | unsigned int *); |
1657 | ||
d521ce57 | 1658 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1659 | ULONGEST str_index); |
3019eac3 | 1660 | |
e142c38c | 1661 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1662 | |
e142c38c DJ |
1663 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1664 | struct dwarf2_cu *); | |
c906108c | 1665 | |
348e048f | 1666 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1667 | unsigned int); |
348e048f | 1668 | |
7d45c7c3 KB |
1669 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1670 | struct dwarf2_cu *cu); | |
1671 | ||
05cf31d1 JB |
1672 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1673 | struct dwarf2_cu *cu); | |
1674 | ||
e142c38c | 1675 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1676 | |
e142c38c | 1677 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1678 | struct dwarf2_cu **); |
63d06c5c | 1679 | |
9c541725 | 1680 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1681 | struct dwarf2_cu *cu); |
debd256d | 1682 | |
f3f5162e | 1683 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1684 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1685 | CORE_ADDR, int decode_mapping); |
c906108c | 1686 | |
4d663531 | 1687 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1688 | |
43f3e411 DE |
1689 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1690 | const char *, const char *, | |
1691 | CORE_ADDR); | |
f4dc4d17 | 1692 | |
a14ed312 | 1693 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1694 | struct dwarf2_cu *); |
c906108c | 1695 | |
34eaf542 TT |
1696 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1697 | struct dwarf2_cu *, struct symbol *); | |
1698 | ||
ff39bb5e | 1699 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1700 | struct dwarf2_cu *); |
c906108c | 1701 | |
ff39bb5e | 1702 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1703 | struct type *type, |
1704 | const char *name, | |
1705 | struct obstack *obstack, | |
12df843f | 1706 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1707 | const gdb_byte **bytes, |
98bfdba5 | 1708 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1709 | |
e7c27a73 | 1710 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1711 | |
b4ba55a1 JB |
1712 | static int need_gnat_info (struct dwarf2_cu *); |
1713 | ||
3e43a32a MS |
1714 | static struct type *die_descriptive_type (struct die_info *, |
1715 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1716 | |
1717 | static void set_descriptive_type (struct type *, struct die_info *, | |
1718 | struct dwarf2_cu *); | |
1719 | ||
e7c27a73 DJ |
1720 | static struct type *die_containing_type (struct die_info *, |
1721 | struct dwarf2_cu *); | |
c906108c | 1722 | |
ff39bb5e | 1723 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1724 | struct dwarf2_cu *); |
c906108c | 1725 | |
f792889a | 1726 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1727 | |
673bfd45 DE |
1728 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1729 | ||
0d5cff50 | 1730 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1731 | |
6e70227d | 1732 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1733 | const char *suffix, int physname, |
1734 | struct dwarf2_cu *cu); | |
63d06c5c | 1735 | |
e7c27a73 | 1736 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1737 | |
348e048f DE |
1738 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1739 | ||
e7c27a73 | 1740 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1741 | |
e7c27a73 | 1742 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1743 | |
96408a79 SA |
1744 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1745 | ||
ff013f42 JK |
1746 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1747 | struct dwarf2_cu *, struct partial_symtab *); | |
1748 | ||
3a2b436a | 1749 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1750 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1751 | enum pc_bounds_kind |
1752 | { | |
e385593e | 1753 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1754 | PC_BOUNDS_NOT_PRESENT, |
1755 | ||
e385593e JK |
1756 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1757 | were present but they do not form a valid range of PC addresses. */ | |
1758 | PC_BOUNDS_INVALID, | |
1759 | ||
3a2b436a JK |
1760 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1761 | PC_BOUNDS_RANGES, | |
1762 | ||
1763 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1764 | PC_BOUNDS_HIGH_LOW, | |
1765 | }; | |
1766 | ||
1767 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1768 | CORE_ADDR *, CORE_ADDR *, | |
1769 | struct dwarf2_cu *, | |
1770 | struct partial_symtab *); | |
c906108c | 1771 | |
fae299cd DC |
1772 | static void get_scope_pc_bounds (struct die_info *, |
1773 | CORE_ADDR *, CORE_ADDR *, | |
1774 | struct dwarf2_cu *); | |
1775 | ||
801e3a5b JB |
1776 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1777 | CORE_ADDR, struct dwarf2_cu *); | |
1778 | ||
a14ed312 | 1779 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1780 | struct dwarf2_cu *); |
c906108c | 1781 | |
a14ed312 | 1782 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1783 | struct type *, struct dwarf2_cu *); |
c906108c | 1784 | |
a14ed312 | 1785 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1786 | struct die_info *, struct type *, |
e7c27a73 | 1787 | struct dwarf2_cu *); |
c906108c | 1788 | |
a14ed312 | 1789 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1790 | struct type *, |
1791 | struct dwarf2_cu *); | |
c906108c | 1792 | |
134d01f1 | 1793 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1794 | |
e7c27a73 | 1795 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1796 | |
e7c27a73 | 1797 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1798 | |
5d7cb8df JK |
1799 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1800 | ||
22cee43f PMR |
1801 | static struct using_direct **using_directives (enum language); |
1802 | ||
27aa8d6a SW |
1803 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1804 | ||
74921315 KS |
1805 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1806 | ||
f55ee35c JK |
1807 | static struct type *read_module_type (struct die_info *die, |
1808 | struct dwarf2_cu *cu); | |
1809 | ||
38d518c9 | 1810 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1811 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1812 | |
134d01f1 | 1813 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1814 | |
e7c27a73 | 1815 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1816 | |
6e70227d | 1817 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1818 | struct dwarf2_cu *); |
1819 | ||
bf6af496 | 1820 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1821 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1822 | struct die_info *); |
639d11d3 | 1823 | |
dee91e82 | 1824 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1825 | const gdb_byte *info_ptr, |
1826 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1827 | struct die_info *parent); |
1828 | ||
d521ce57 TT |
1829 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1830 | struct die_info **, const gdb_byte *, | |
1831 | int *, int); | |
3019eac3 | 1832 | |
d521ce57 TT |
1833 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1834 | struct die_info **, const gdb_byte *, | |
1835 | int *); | |
93311388 | 1836 | |
e7c27a73 | 1837 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1838 | |
15d034d0 TT |
1839 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1840 | struct obstack *); | |
71c25dea | 1841 | |
15d034d0 | 1842 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1843 | |
15d034d0 | 1844 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1845 | struct die_info *die, |
1846 | struct dwarf2_cu *cu); | |
1847 | ||
ca69b9e6 DE |
1848 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1849 | struct dwarf2_cu *cu); | |
1850 | ||
e142c38c | 1851 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1852 | struct dwarf2_cu **); |
9219021c | 1853 | |
f39c6ffd | 1854 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1855 | |
f39c6ffd | 1856 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1857 | |
f39c6ffd | 1858 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1859 | |
a121b7c1 | 1860 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1861 | |
f39c6ffd | 1862 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1863 | |
f9aca02d | 1864 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1865 | |
d97bc12b DE |
1866 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1867 | ||
1868 | static void dump_die_for_error (struct die_info *); | |
1869 | ||
1870 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1871 | struct die_info *); | |
c906108c | 1872 | |
d97bc12b | 1873 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1874 | |
51545339 | 1875 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1876 | struct dwarf2_cu *); |
c906108c | 1877 | |
ff39bb5e | 1878 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1879 | |
ff39bb5e | 1880 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1881 | |
348e048f | 1882 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1883 | const struct attribute *, |
348e048f DE |
1884 | struct dwarf2_cu **); |
1885 | ||
10b3939b | 1886 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1887 | const struct attribute *, |
f2f0e013 | 1888 | struct dwarf2_cu **); |
c906108c | 1889 | |
348e048f | 1890 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1891 | const struct attribute *, |
348e048f DE |
1892 | struct dwarf2_cu **); |
1893 | ||
ac9ec31b DE |
1894 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1895 | struct dwarf2_cu *); | |
1896 | ||
1897 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1898 | const struct attribute *, |
ac9ec31b DE |
1899 | struct dwarf2_cu *); |
1900 | ||
e5fe5e75 | 1901 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1902 | |
52dc124a | 1903 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1904 | |
63e43d3a PMR |
1905 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1906 | struct die_info *die, struct dwarf2_cu *cu, | |
1907 | struct dynamic_prop *prop); | |
1908 | ||
c906108c SS |
1909 | /* memory allocation interface */ |
1910 | ||
7b5a2f43 | 1911 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1912 | |
b60c80d6 | 1913 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1914 | |
43f3e411 | 1915 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1916 | |
6e5a29e1 | 1917 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1918 | |
6e5a29e1 | 1919 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1920 | |
6e5a29e1 | 1921 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1922 | |
6e5a29e1 | 1923 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1924 | |
8cf6f0b1 TT |
1925 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1926 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1927 | const struct attribute *attr); |
8cf6f0b1 | 1928 | |
ff39bb5e | 1929 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1930 | struct symbol *sym, |
f1e6e072 TT |
1931 | struct dwarf2_cu *cu, |
1932 | int is_block); | |
4c2df51b | 1933 | |
d521ce57 TT |
1934 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1935 | const gdb_byte *info_ptr, | |
1936 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1937 | |
72bf9492 DJ |
1938 | static void free_stack_comp_unit (void *); |
1939 | ||
72bf9492 DJ |
1940 | static hashval_t partial_die_hash (const void *item); |
1941 | ||
1942 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1943 | ||
ae038cb0 | 1944 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
9c541725 | 1945 | (sect_offset sect_off, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1946 | |
9816fde3 | 1947 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1948 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1949 | |
1950 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1951 | struct die_info *comp_unit_die, |
1952 | enum language pretend_language); | |
93311388 | 1953 | |
68dc6402 | 1954 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1955 | |
1956 | static void free_cached_comp_units (void *); | |
1957 | ||
1958 | static void age_cached_comp_units (void); | |
1959 | ||
dee91e82 | 1960 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1961 | |
f792889a DJ |
1962 | static struct type *set_die_type (struct die_info *, struct type *, |
1963 | struct dwarf2_cu *); | |
1c379e20 | 1964 | |
ae038cb0 DJ |
1965 | static void create_all_comp_units (struct objfile *); |
1966 | ||
0e50663e | 1967 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1968 | |
95554aad TT |
1969 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1970 | enum language); | |
10b3939b | 1971 | |
95554aad TT |
1972 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1973 | enum language); | |
10b3939b | 1974 | |
f4dc4d17 DE |
1975 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1976 | enum language); | |
1977 | ||
10b3939b DJ |
1978 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1979 | struct dwarf2_per_cu_data *); | |
1980 | ||
ae038cb0 DJ |
1981 | static void dwarf2_mark (struct dwarf2_cu *); |
1982 | ||
1983 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1984 | ||
b64f50a1 | 1985 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1986 | struct dwarf2_per_cu_data *); |
673bfd45 | 1987 | |
f792889a | 1988 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1989 | |
9291a0cd TT |
1990 | static void dwarf2_release_queue (void *dummy); |
1991 | ||
95554aad TT |
1992 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1993 | enum language pretend_language); | |
1994 | ||
a0f42c21 | 1995 | static void process_queue (void); |
9291a0cd | 1996 | |
d721ba37 PA |
1997 | /* The return type of find_file_and_directory. Note, the enclosed |
1998 | string pointers are only valid while this object is valid. */ | |
1999 | ||
2000 | struct file_and_directory | |
2001 | { | |
2002 | /* The filename. This is never NULL. */ | |
2003 | const char *name; | |
2004 | ||
2005 | /* The compilation directory. NULL if not known. If we needed to | |
2006 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
2007 | points directly to the DW_AT_comp_dir string attribute owned by | |
2008 | the obstack that owns the DIE. */ | |
2009 | const char *comp_dir; | |
2010 | ||
2011 | /* If we needed to build a new string for comp_dir, this is what | |
2012 | owns the storage. */ | |
2013 | std::string comp_dir_storage; | |
2014 | }; | |
2015 | ||
2016 | static file_and_directory find_file_and_directory (struct die_info *die, | |
2017 | struct dwarf2_cu *cu); | |
9291a0cd TT |
2018 | |
2019 | static char *file_full_name (int file, struct line_header *lh, | |
2020 | const char *comp_dir); | |
2021 | ||
43988095 JK |
2022 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
2023 | enum class rcuh_kind { COMPILE, TYPE }; | |
2024 | ||
d521ce57 | 2025 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
2026 | (struct comp_unit_head *header, |
2027 | struct dwarf2_section_info *section, | |
d521ce57 | 2028 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 2029 | rcuh_kind section_kind); |
36586728 | 2030 | |
fd820528 | 2031 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
2032 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
2033 | int use_existing_cu, int keep, | |
3019eac3 DE |
2034 | die_reader_func_ftype *die_reader_func, void *data); |
2035 | ||
dee91e82 DE |
2036 | static void init_cutu_and_read_dies_simple |
2037 | (struct dwarf2_per_cu_data *this_cu, | |
2038 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 2039 | |
673bfd45 | 2040 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 2041 | |
3019eac3 DE |
2042 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
2043 | ||
57d63ce2 DE |
2044 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
2045 | (struct dwp_file *dwp_file, const char *comp_dir, | |
2046 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
2047 | |
2048 | static struct dwp_file *get_dwp_file (void); | |
2049 | ||
3019eac3 | 2050 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2051 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2052 | |
2053 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2054 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2055 | |
89e63ee4 DE |
2056 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2057 | ||
3019eac3 DE |
2058 | static void free_dwo_file_cleanup (void *); |
2059 | ||
95554aad TT |
2060 | static void process_cu_includes (void); |
2061 | ||
1b80a9fa | 2062 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2063 | |
2064 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2065 | \f |
2066 | /* Various complaints about symbol reading that don't abort the process. */ | |
2067 | ||
2068 | static void | |
2069 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2070 | { | |
2071 | complaint (&symfile_complaints, | |
2072 | _("statement list doesn't fit in .debug_line section")); | |
2073 | } | |
2074 | ||
2075 | static void | |
2076 | dwarf2_debug_line_missing_file_complaint (void) | |
2077 | { | |
2078 | complaint (&symfile_complaints, | |
2079 | _(".debug_line section has line data without a file")); | |
2080 | } | |
2081 | ||
2082 | static void | |
2083 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2084 | { | |
2085 | complaint (&symfile_complaints, | |
2086 | _(".debug_line section has line " | |
2087 | "program sequence without an end")); | |
2088 | } | |
2089 | ||
2090 | static void | |
2091 | dwarf2_complex_location_expr_complaint (void) | |
2092 | { | |
2093 | complaint (&symfile_complaints, _("location expression too complex")); | |
2094 | } | |
2095 | ||
2096 | static void | |
2097 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2098 | int arg3) | |
2099 | { | |
2100 | complaint (&symfile_complaints, | |
2101 | _("const value length mismatch for '%s', got %d, expected %d"), | |
2102 | arg1, arg2, arg3); | |
2103 | } | |
2104 | ||
2105 | static void | |
2106 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2107 | { | |
2108 | complaint (&symfile_complaints, | |
2109 | _("debug info runs off end of %s section" | |
2110 | " [in module %s]"), | |
a32a8923 DE |
2111 | get_section_name (section), |
2112 | get_section_file_name (section)); | |
4390d890 | 2113 | } |
1b80a9fa | 2114 | |
4390d890 DE |
2115 | static void |
2116 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2117 | { | |
2118 | complaint (&symfile_complaints, | |
2119 | _("macro debug info contains a " | |
2120 | "malformed macro definition:\n`%s'"), | |
2121 | arg1); | |
2122 | } | |
2123 | ||
2124 | static void | |
2125 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2126 | { | |
2127 | complaint (&symfile_complaints, | |
2128 | _("invalid attribute class or form for '%s' in '%s'"), | |
2129 | arg1, arg2); | |
2130 | } | |
527f3840 JK |
2131 | |
2132 | /* Hash function for line_header_hash. */ | |
2133 | ||
2134 | static hashval_t | |
2135 | line_header_hash (const struct line_header *ofs) | |
2136 | { | |
9c541725 | 2137 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2138 | } |
2139 | ||
2140 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2141 | ||
2142 | static hashval_t | |
2143 | line_header_hash_voidp (const void *item) | |
2144 | { | |
9a3c8263 | 2145 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2146 | |
2147 | return line_header_hash (ofs); | |
2148 | } | |
2149 | ||
2150 | /* Equality function for line_header_hash. */ | |
2151 | ||
2152 | static int | |
2153 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2154 | { | |
9a3c8263 SM |
2155 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2156 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2157 | |
9c541725 | 2158 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2159 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2160 | } | |
2161 | ||
4390d890 | 2162 | \f |
9291a0cd TT |
2163 | #if WORDS_BIGENDIAN |
2164 | ||
2165 | /* Convert VALUE between big- and little-endian. */ | |
2166 | static offset_type | |
2167 | byte_swap (offset_type value) | |
2168 | { | |
2169 | offset_type result; | |
2170 | ||
2171 | result = (value & 0xff) << 24; | |
2172 | result |= (value & 0xff00) << 8; | |
2173 | result |= (value & 0xff0000) >> 8; | |
2174 | result |= (value & 0xff000000) >> 24; | |
2175 | return result; | |
2176 | } | |
2177 | ||
2178 | #define MAYBE_SWAP(V) byte_swap (V) | |
2179 | ||
2180 | #else | |
bc8f2430 | 2181 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) |
9291a0cd TT |
2182 | #endif /* WORDS_BIGENDIAN */ |
2183 | ||
31aa7e4e JB |
2184 | /* Read the given attribute value as an address, taking the attribute's |
2185 | form into account. */ | |
2186 | ||
2187 | static CORE_ADDR | |
2188 | attr_value_as_address (struct attribute *attr) | |
2189 | { | |
2190 | CORE_ADDR addr; | |
2191 | ||
2192 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2193 | { | |
2194 | /* Aside from a few clearly defined exceptions, attributes that | |
2195 | contain an address must always be in DW_FORM_addr form. | |
2196 | Unfortunately, some compilers happen to be violating this | |
2197 | requirement by encoding addresses using other forms, such | |
2198 | as DW_FORM_data4 for example. For those broken compilers, | |
2199 | we try to do our best, without any guarantee of success, | |
2200 | to interpret the address correctly. It would also be nice | |
2201 | to generate a complaint, but that would require us to maintain | |
2202 | a list of legitimate cases where a non-address form is allowed, | |
2203 | as well as update callers to pass in at least the CU's DWARF | |
2204 | version. This is more overhead than what we're willing to | |
2205 | expand for a pretty rare case. */ | |
2206 | addr = DW_UNSND (attr); | |
2207 | } | |
2208 | else | |
2209 | addr = DW_ADDR (attr); | |
2210 | ||
2211 | return addr; | |
2212 | } | |
2213 | ||
9291a0cd TT |
2214 | /* The suffix for an index file. */ |
2215 | #define INDEX_SUFFIX ".gdb-index" | |
2216 | ||
330cdd98 PA |
2217 | /* See declaration. */ |
2218 | ||
2219 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2220 | const dwarf2_debug_sections *names) | |
2221 | : objfile (objfile_) | |
2222 | { | |
2223 | if (names == NULL) | |
2224 | names = &dwarf2_elf_names; | |
2225 | ||
2226 | bfd *obfd = objfile->obfd; | |
2227 | ||
2228 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2229 | locate_sections (obfd, sec, *names); | |
2230 | } | |
2231 | ||
2232 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2233 | { | |
2234 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2235 | free_cached_comp_units (); | |
2236 | ||
2237 | if (quick_file_names_table) | |
2238 | htab_delete (quick_file_names_table); | |
2239 | ||
2240 | if (line_header_hash) | |
2241 | htab_delete (line_header_hash); | |
2242 | ||
2243 | /* Everything else should be on the objfile obstack. */ | |
2244 | } | |
2245 | ||
2246 | /* See declaration. */ | |
2247 | ||
2248 | void | |
2249 | dwarf2_per_objfile::free_cached_comp_units () | |
2250 | { | |
2251 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2252 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2253 | while (per_cu != NULL) | |
2254 | { | |
2255 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2256 | ||
2257 | free_heap_comp_unit (per_cu->cu); | |
2258 | *last_chain = next_cu; | |
2259 | per_cu = next_cu; | |
2260 | } | |
2261 | } | |
2262 | ||
c906108c | 2263 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2264 | information and return true if we have enough to do something. |
2265 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2266 | ELF names are used. */ | |
c906108c SS |
2267 | |
2268 | int | |
251d32d9 TG |
2269 | dwarf2_has_info (struct objfile *objfile, |
2270 | const struct dwarf2_debug_sections *names) | |
c906108c | 2271 | { |
9a3c8263 SM |
2272 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2273 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2274 | if (!dwarf2_per_objfile) |
2275 | { | |
2276 | /* Initialize per-objfile state. */ | |
2277 | struct dwarf2_per_objfile *data | |
8d749320 | 2278 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2279 | |
330cdd98 PA |
2280 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
2281 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); | |
be391dca | 2282 | } |
73869dc2 | 2283 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2284 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2285 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2286 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2287 | } |
2288 | ||
2289 | /* Return the containing section of virtual section SECTION. */ | |
2290 | ||
2291 | static struct dwarf2_section_info * | |
2292 | get_containing_section (const struct dwarf2_section_info *section) | |
2293 | { | |
2294 | gdb_assert (section->is_virtual); | |
2295 | return section->s.containing_section; | |
c906108c SS |
2296 | } |
2297 | ||
a32a8923 DE |
2298 | /* Return the bfd owner of SECTION. */ |
2299 | ||
2300 | static struct bfd * | |
2301 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2302 | { | |
73869dc2 DE |
2303 | if (section->is_virtual) |
2304 | { | |
2305 | section = get_containing_section (section); | |
2306 | gdb_assert (!section->is_virtual); | |
2307 | } | |
049412e3 | 2308 | return section->s.section->owner; |
a32a8923 DE |
2309 | } |
2310 | ||
2311 | /* Return the bfd section of SECTION. | |
2312 | Returns NULL if the section is not present. */ | |
2313 | ||
2314 | static asection * | |
2315 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2316 | { | |
73869dc2 DE |
2317 | if (section->is_virtual) |
2318 | { | |
2319 | section = get_containing_section (section); | |
2320 | gdb_assert (!section->is_virtual); | |
2321 | } | |
049412e3 | 2322 | return section->s.section; |
a32a8923 DE |
2323 | } |
2324 | ||
2325 | /* Return the name of SECTION. */ | |
2326 | ||
2327 | static const char * | |
2328 | get_section_name (const struct dwarf2_section_info *section) | |
2329 | { | |
2330 | asection *sectp = get_section_bfd_section (section); | |
2331 | ||
2332 | gdb_assert (sectp != NULL); | |
2333 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2334 | } | |
2335 | ||
2336 | /* Return the name of the file SECTION is in. */ | |
2337 | ||
2338 | static const char * | |
2339 | get_section_file_name (const struct dwarf2_section_info *section) | |
2340 | { | |
2341 | bfd *abfd = get_section_bfd_owner (section); | |
2342 | ||
2343 | return bfd_get_filename (abfd); | |
2344 | } | |
2345 | ||
2346 | /* Return the id of SECTION. | |
2347 | Returns 0 if SECTION doesn't exist. */ | |
2348 | ||
2349 | static int | |
2350 | get_section_id (const struct dwarf2_section_info *section) | |
2351 | { | |
2352 | asection *sectp = get_section_bfd_section (section); | |
2353 | ||
2354 | if (sectp == NULL) | |
2355 | return 0; | |
2356 | return sectp->id; | |
2357 | } | |
2358 | ||
2359 | /* Return the flags of SECTION. | |
73869dc2 | 2360 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2361 | |
2362 | static int | |
2363 | get_section_flags (const struct dwarf2_section_info *section) | |
2364 | { | |
2365 | asection *sectp = get_section_bfd_section (section); | |
2366 | ||
2367 | gdb_assert (sectp != NULL); | |
2368 | return bfd_get_section_flags (sectp->owner, sectp); | |
2369 | } | |
2370 | ||
251d32d9 TG |
2371 | /* When loading sections, we look either for uncompressed section or for |
2372 | compressed section names. */ | |
233a11ab CS |
2373 | |
2374 | static int | |
251d32d9 TG |
2375 | section_is_p (const char *section_name, |
2376 | const struct dwarf2_section_names *names) | |
233a11ab | 2377 | { |
251d32d9 TG |
2378 | if (names->normal != NULL |
2379 | && strcmp (section_name, names->normal) == 0) | |
2380 | return 1; | |
2381 | if (names->compressed != NULL | |
2382 | && strcmp (section_name, names->compressed) == 0) | |
2383 | return 1; | |
2384 | return 0; | |
233a11ab CS |
2385 | } |
2386 | ||
330cdd98 | 2387 | /* See declaration. */ |
c906108c | 2388 | |
330cdd98 PA |
2389 | void |
2390 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2391 | const dwarf2_debug_sections &names) | |
c906108c | 2392 | { |
dc7650b8 | 2393 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2394 | |
dc7650b8 JK |
2395 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2396 | { | |
2397 | } | |
330cdd98 | 2398 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2399 | { |
330cdd98 PA |
2400 | this->info.s.section = sectp; |
2401 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2402 | } |
330cdd98 | 2403 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2404 | { |
330cdd98 PA |
2405 | this->abbrev.s.section = sectp; |
2406 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2407 | } |
330cdd98 | 2408 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2409 | { |
330cdd98 PA |
2410 | this->line.s.section = sectp; |
2411 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2412 | } |
330cdd98 | 2413 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2414 | { |
330cdd98 PA |
2415 | this->loc.s.section = sectp; |
2416 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2417 | } |
330cdd98 | 2418 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2419 | { |
330cdd98 PA |
2420 | this->loclists.s.section = sectp; |
2421 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2422 | } |
330cdd98 | 2423 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2424 | { |
330cdd98 PA |
2425 | this->macinfo.s.section = sectp; |
2426 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2427 | } |
330cdd98 | 2428 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2429 | { |
330cdd98 PA |
2430 | this->macro.s.section = sectp; |
2431 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2432 | } |
330cdd98 | 2433 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2434 | { |
330cdd98 PA |
2435 | this->str.s.section = sectp; |
2436 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2437 | } |
330cdd98 | 2438 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2439 | { |
330cdd98 PA |
2440 | this->line_str.s.section = sectp; |
2441 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2442 | } |
330cdd98 | 2443 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2444 | { |
330cdd98 PA |
2445 | this->addr.s.section = sectp; |
2446 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2447 | } |
330cdd98 | 2448 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2449 | { |
330cdd98 PA |
2450 | this->frame.s.section = sectp; |
2451 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2452 | } |
330cdd98 | 2453 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2454 | { |
330cdd98 PA |
2455 | this->eh_frame.s.section = sectp; |
2456 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2457 | } |
330cdd98 | 2458 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2459 | { |
330cdd98 PA |
2460 | this->ranges.s.section = sectp; |
2461 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2462 | } |
330cdd98 | 2463 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2464 | { |
330cdd98 PA |
2465 | this->rnglists.s.section = sectp; |
2466 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2467 | } |
330cdd98 | 2468 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2469 | { |
8b70b953 TT |
2470 | struct dwarf2_section_info type_section; |
2471 | ||
2472 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2473 | type_section.s.section = sectp; |
8b70b953 TT |
2474 | type_section.size = bfd_get_section_size (sectp); |
2475 | ||
330cdd98 | 2476 | VEC_safe_push (dwarf2_section_info_def, this->types, |
8b70b953 | 2477 | &type_section); |
348e048f | 2478 | } |
330cdd98 | 2479 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2480 | { |
330cdd98 PA |
2481 | this->gdb_index.s.section = sectp; |
2482 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2483 | } |
dce234bc | 2484 | |
b4e1fd61 | 2485 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2486 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2487 | this->has_section_at_zero = true; |
c906108c SS |
2488 | } |
2489 | ||
fceca515 DE |
2490 | /* A helper function that decides whether a section is empty, |
2491 | or not present. */ | |
9e0ac564 TT |
2492 | |
2493 | static int | |
19ac8c2e | 2494 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2495 | { |
73869dc2 DE |
2496 | if (section->is_virtual) |
2497 | return section->size == 0; | |
049412e3 | 2498 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2499 | } |
2500 | ||
3019eac3 DE |
2501 | /* Read the contents of the section INFO. |
2502 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2503 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2504 | of the DWO file. | |
dce234bc | 2505 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2506 | |
dce234bc PP |
2507 | static void |
2508 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2509 | { |
a32a8923 | 2510 | asection *sectp; |
3019eac3 | 2511 | bfd *abfd; |
dce234bc | 2512 | gdb_byte *buf, *retbuf; |
c906108c | 2513 | |
be391dca TT |
2514 | if (info->readin) |
2515 | return; | |
dce234bc | 2516 | info->buffer = NULL; |
be391dca | 2517 | info->readin = 1; |
188dd5d6 | 2518 | |
9e0ac564 | 2519 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2520 | return; |
c906108c | 2521 | |
a32a8923 | 2522 | sectp = get_section_bfd_section (info); |
3019eac3 | 2523 | |
73869dc2 DE |
2524 | /* If this is a virtual section we need to read in the real one first. */ |
2525 | if (info->is_virtual) | |
2526 | { | |
2527 | struct dwarf2_section_info *containing_section = | |
2528 | get_containing_section (info); | |
2529 | ||
2530 | gdb_assert (sectp != NULL); | |
2531 | if ((sectp->flags & SEC_RELOC) != 0) | |
2532 | { | |
2533 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2534 | " supported in section %s [in module %s]"), | |
2535 | get_section_name (info), get_section_file_name (info)); | |
2536 | } | |
2537 | dwarf2_read_section (objfile, containing_section); | |
2538 | /* Other code should have already caught virtual sections that don't | |
2539 | fit. */ | |
2540 | gdb_assert (info->virtual_offset + info->size | |
2541 | <= containing_section->size); | |
2542 | /* If the real section is empty or there was a problem reading the | |
2543 | section we shouldn't get here. */ | |
2544 | gdb_assert (containing_section->buffer != NULL); | |
2545 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2546 | return; | |
2547 | } | |
2548 | ||
4bf44c1c TT |
2549 | /* If the section has relocations, we must read it ourselves. |
2550 | Otherwise we attach it to the BFD. */ | |
2551 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2552 | { |
d521ce57 | 2553 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2554 | return; |
dce234bc | 2555 | } |
dce234bc | 2556 | |
224c3ddb | 2557 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2558 | info->buffer = buf; |
dce234bc PP |
2559 | |
2560 | /* When debugging .o files, we may need to apply relocations; see | |
2561 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2562 | We never compress sections in .o files, so we only need to | |
2563 | try this when the section is not compressed. */ | |
ac8035ab | 2564 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2565 | if (retbuf != NULL) |
2566 | { | |
2567 | info->buffer = retbuf; | |
2568 | return; | |
2569 | } | |
2570 | ||
a32a8923 DE |
2571 | abfd = get_section_bfd_owner (info); |
2572 | gdb_assert (abfd != NULL); | |
2573 | ||
dce234bc PP |
2574 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2575 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2576 | { |
2577 | error (_("Dwarf Error: Can't read DWARF data" | |
2578 | " in section %s [in module %s]"), | |
2579 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2580 | } | |
dce234bc PP |
2581 | } |
2582 | ||
9e0ac564 TT |
2583 | /* A helper function that returns the size of a section in a safe way. |
2584 | If you are positive that the section has been read before using the | |
2585 | size, then it is safe to refer to the dwarf2_section_info object's | |
2586 | "size" field directly. In other cases, you must call this | |
2587 | function, because for compressed sections the size field is not set | |
2588 | correctly until the section has been read. */ | |
2589 | ||
2590 | static bfd_size_type | |
2591 | dwarf2_section_size (struct objfile *objfile, | |
2592 | struct dwarf2_section_info *info) | |
2593 | { | |
2594 | if (!info->readin) | |
2595 | dwarf2_read_section (objfile, info); | |
2596 | return info->size; | |
2597 | } | |
2598 | ||
dce234bc | 2599 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2600 | SECTION_NAME. */ |
af34e669 | 2601 | |
dce234bc | 2602 | void |
3017a003 TG |
2603 | dwarf2_get_section_info (struct objfile *objfile, |
2604 | enum dwarf2_section_enum sect, | |
d521ce57 | 2605 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2606 | bfd_size_type *sizep) |
2607 | { | |
2608 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2609 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2610 | dwarf2_objfile_data_key); | |
dce234bc | 2611 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2612 | |
2613 | /* We may see an objfile without any DWARF, in which case we just | |
2614 | return nothing. */ | |
2615 | if (data == NULL) | |
2616 | { | |
2617 | *sectp = NULL; | |
2618 | *bufp = NULL; | |
2619 | *sizep = 0; | |
2620 | return; | |
2621 | } | |
3017a003 TG |
2622 | switch (sect) |
2623 | { | |
2624 | case DWARF2_DEBUG_FRAME: | |
2625 | info = &data->frame; | |
2626 | break; | |
2627 | case DWARF2_EH_FRAME: | |
2628 | info = &data->eh_frame; | |
2629 | break; | |
2630 | default: | |
2631 | gdb_assert_not_reached ("unexpected section"); | |
2632 | } | |
dce234bc | 2633 | |
9e0ac564 | 2634 | dwarf2_read_section (objfile, info); |
dce234bc | 2635 | |
a32a8923 | 2636 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2637 | *bufp = info->buffer; |
2638 | *sizep = info->size; | |
2639 | } | |
2640 | ||
36586728 TT |
2641 | /* A helper function to find the sections for a .dwz file. */ |
2642 | ||
2643 | static void | |
2644 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2645 | { | |
9a3c8263 | 2646 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2647 | |
2648 | /* Note that we only support the standard ELF names, because .dwz | |
2649 | is ELF-only (at the time of writing). */ | |
2650 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2651 | { | |
049412e3 | 2652 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2653 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2654 | } | |
2655 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2656 | { | |
049412e3 | 2657 | dwz_file->info.s.section = sectp; |
36586728 TT |
2658 | dwz_file->info.size = bfd_get_section_size (sectp); |
2659 | } | |
2660 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2661 | { | |
049412e3 | 2662 | dwz_file->str.s.section = sectp; |
36586728 TT |
2663 | dwz_file->str.size = bfd_get_section_size (sectp); |
2664 | } | |
2665 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2666 | { | |
049412e3 | 2667 | dwz_file->line.s.section = sectp; |
36586728 TT |
2668 | dwz_file->line.size = bfd_get_section_size (sectp); |
2669 | } | |
2670 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2671 | { | |
049412e3 | 2672 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2673 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2674 | } | |
2ec9a5e0 TT |
2675 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2676 | { | |
049412e3 | 2677 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2678 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2679 | } | |
36586728 TT |
2680 | } |
2681 | ||
4db1a1dc TT |
2682 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2683 | there is no .gnu_debugaltlink section in the file. Error if there | |
2684 | is such a section but the file cannot be found. */ | |
36586728 TT |
2685 | |
2686 | static struct dwz_file * | |
2687 | dwarf2_get_dwz_file (void) | |
2688 | { | |
36586728 TT |
2689 | const char *filename; |
2690 | struct dwz_file *result; | |
acd13123 | 2691 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2692 | size_t buildid_len; |
2693 | bfd_byte *buildid; | |
36586728 TT |
2694 | |
2695 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2696 | return dwarf2_per_objfile->dwz_file; | |
2697 | ||
4db1a1dc | 2698 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2699 | gdb::unique_xmalloc_ptr<char> data |
2700 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2701 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2702 | if (data == NULL) |
2703 | { | |
2704 | if (bfd_get_error () == bfd_error_no_error) | |
2705 | return NULL; | |
2706 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2707 | bfd_errmsg (bfd_get_error ())); | |
2708 | } | |
791afaa2 TT |
2709 | |
2710 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2711 | |
acd13123 TT |
2712 | buildid_len = (size_t) buildid_len_arg; |
2713 | ||
791afaa2 | 2714 | filename = data.get (); |
d721ba37 PA |
2715 | |
2716 | std::string abs_storage; | |
36586728 TT |
2717 | if (!IS_ABSOLUTE_PATH (filename)) |
2718 | { | |
14278e1f TT |
2719 | gdb::unique_xmalloc_ptr<char> abs |
2720 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2721 | |
14278e1f | 2722 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2723 | filename = abs_storage.c_str (); |
36586728 TT |
2724 | } |
2725 | ||
dc294be5 TT |
2726 | /* First try the file name given in the section. If that doesn't |
2727 | work, try to use the build-id instead. */ | |
192b62ce | 2728 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2729 | if (dwz_bfd != NULL) |
36586728 | 2730 | { |
192b62ce TT |
2731 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2732 | dwz_bfd.release (); | |
36586728 TT |
2733 | } |
2734 | ||
dc294be5 TT |
2735 | if (dwz_bfd == NULL) |
2736 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2737 | ||
2738 | if (dwz_bfd == NULL) | |
2739 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2740 | objfile_name (dwarf2_per_objfile->objfile)); | |
2741 | ||
36586728 TT |
2742 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2743 | struct dwz_file); | |
192b62ce | 2744 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2745 | |
192b62ce | 2746 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 | 2747 | |
192b62ce | 2748 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2749 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2750 | return result; |
2751 | } | |
9291a0cd | 2752 | \f |
7b9f3c50 DE |
2753 | /* DWARF quick_symbols_functions support. */ |
2754 | ||
2755 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2756 | unique line tables, so we maintain a separate table of all .debug_line | |
2757 | derived entries to support the sharing. | |
2758 | All the quick functions need is the list of file names. We discard the | |
2759 | line_header when we're done and don't need to record it here. */ | |
2760 | struct quick_file_names | |
2761 | { | |
094b34ac DE |
2762 | /* The data used to construct the hash key. */ |
2763 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2764 | |
2765 | /* The number of entries in file_names, real_names. */ | |
2766 | unsigned int num_file_names; | |
2767 | ||
2768 | /* The file names from the line table, after being run through | |
2769 | file_full_name. */ | |
2770 | const char **file_names; | |
2771 | ||
2772 | /* The file names from the line table after being run through | |
2773 | gdb_realpath. These are computed lazily. */ | |
2774 | const char **real_names; | |
2775 | }; | |
2776 | ||
2777 | /* When using the index (and thus not using psymtabs), each CU has an | |
2778 | object of this type. This is used to hold information needed by | |
2779 | the various "quick" methods. */ | |
2780 | struct dwarf2_per_cu_quick_data | |
2781 | { | |
2782 | /* The file table. This can be NULL if there was no file table | |
2783 | or it's currently not read in. | |
2784 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2785 | struct quick_file_names *file_names; | |
2786 | ||
2787 | /* The corresponding symbol table. This is NULL if symbols for this | |
2788 | CU have not yet been read. */ | |
43f3e411 | 2789 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2790 | |
2791 | /* A temporary mark bit used when iterating over all CUs in | |
2792 | expand_symtabs_matching. */ | |
2793 | unsigned int mark : 1; | |
2794 | ||
2795 | /* True if we've tried to read the file table and found there isn't one. | |
2796 | There will be no point in trying to read it again next time. */ | |
2797 | unsigned int no_file_data : 1; | |
2798 | }; | |
2799 | ||
094b34ac DE |
2800 | /* Utility hash function for a stmt_list_hash. */ |
2801 | ||
2802 | static hashval_t | |
2803 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2804 | { | |
2805 | hashval_t v = 0; | |
2806 | ||
2807 | if (stmt_list_hash->dwo_unit != NULL) | |
2808 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2809 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2810 | return v; |
2811 | } | |
2812 | ||
2813 | /* Utility equality function for a stmt_list_hash. */ | |
2814 | ||
2815 | static int | |
2816 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2817 | const struct stmt_list_hash *rhs) | |
2818 | { | |
2819 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2820 | return 0; | |
2821 | if (lhs->dwo_unit != NULL | |
2822 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2823 | return 0; | |
2824 | ||
9c541725 | 2825 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2826 | } |
2827 | ||
7b9f3c50 DE |
2828 | /* Hash function for a quick_file_names. */ |
2829 | ||
2830 | static hashval_t | |
2831 | hash_file_name_entry (const void *e) | |
2832 | { | |
9a3c8263 SM |
2833 | const struct quick_file_names *file_data |
2834 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2835 | |
094b34ac | 2836 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2837 | } |
2838 | ||
2839 | /* Equality function for a quick_file_names. */ | |
2840 | ||
2841 | static int | |
2842 | eq_file_name_entry (const void *a, const void *b) | |
2843 | { | |
9a3c8263 SM |
2844 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2845 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2846 | |
094b34ac | 2847 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2848 | } |
2849 | ||
2850 | /* Delete function for a quick_file_names. */ | |
2851 | ||
2852 | static void | |
2853 | delete_file_name_entry (void *e) | |
2854 | { | |
9a3c8263 | 2855 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2856 | int i; |
2857 | ||
2858 | for (i = 0; i < file_data->num_file_names; ++i) | |
2859 | { | |
2860 | xfree ((void*) file_data->file_names[i]); | |
2861 | if (file_data->real_names) | |
2862 | xfree ((void*) file_data->real_names[i]); | |
2863 | } | |
2864 | ||
2865 | /* The space for the struct itself lives on objfile_obstack, | |
2866 | so we don't free it here. */ | |
2867 | } | |
2868 | ||
2869 | /* Create a quick_file_names hash table. */ | |
2870 | ||
2871 | static htab_t | |
2872 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2873 | { | |
2874 | return htab_create_alloc (nr_initial_entries, | |
2875 | hash_file_name_entry, eq_file_name_entry, | |
2876 | delete_file_name_entry, xcalloc, xfree); | |
2877 | } | |
9291a0cd | 2878 | |
918dd910 JK |
2879 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2880 | have to be created afterwards. You should call age_cached_comp_units after | |
2881 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2882 | ||
2883 | static void | |
2884 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2885 | { | |
3019eac3 | 2886 | if (per_cu->is_debug_types) |
e5fe5e75 | 2887 | load_full_type_unit (per_cu); |
918dd910 | 2888 | else |
95554aad | 2889 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2890 | |
cc12ce38 DE |
2891 | if (per_cu->cu == NULL) |
2892 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2893 | |
2894 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2895 | } |
2896 | ||
a0f42c21 | 2897 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2898 | |
9291a0cd | 2899 | static void |
a0f42c21 | 2900 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2901 | { |
2902 | struct cleanup *back_to; | |
2903 | ||
f4dc4d17 DE |
2904 | /* Skip type_unit_groups, reading the type units they contain |
2905 | is handled elsewhere. */ | |
2906 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2907 | return; | |
2908 | ||
9291a0cd TT |
2909 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2910 | ||
95554aad | 2911 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2912 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2913 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2914 | { | |
2915 | queue_comp_unit (per_cu, language_minimal); | |
2916 | load_cu (per_cu); | |
89e63ee4 DE |
2917 | |
2918 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2919 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2920 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2921 | if (!per_cu->is_debug_types | |
cc12ce38 | 2922 | && per_cu->cu != NULL |
89e63ee4 DE |
2923 | && per_cu->cu->dwo_unit != NULL |
2924 | && dwarf2_per_objfile->index_table != NULL | |
2925 | && dwarf2_per_objfile->index_table->version <= 7 | |
2926 | /* DWP files aren't supported yet. */ | |
2927 | && get_dwp_file () == NULL) | |
2928 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2929 | } |
9291a0cd | 2930 | |
a0f42c21 | 2931 | process_queue (); |
9291a0cd TT |
2932 | |
2933 | /* Age the cache, releasing compilation units that have not | |
2934 | been used recently. */ | |
2935 | age_cached_comp_units (); | |
2936 | ||
2937 | do_cleanups (back_to); | |
2938 | } | |
2939 | ||
2940 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2941 | the objfile from which this CU came. Returns the resulting symbol | |
2942 | table. */ | |
2fdf6df6 | 2943 | |
43f3e411 | 2944 | static struct compunit_symtab * |
a0f42c21 | 2945 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2946 | { |
95554aad | 2947 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2948 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2949 | { |
2950 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 2951 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 2952 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2953 | process_cu_includes (); |
9291a0cd TT |
2954 | do_cleanups (back_to); |
2955 | } | |
f194fefb | 2956 | |
43f3e411 | 2957 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2958 | } |
2959 | ||
8832e7e3 | 2960 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2961 | |
2962 | This is intended for loops like: | |
2963 | ||
2964 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2965 | + dwarf2_per_objfile->n_type_units); ++i) | |
2966 | { | |
8832e7e3 | 2967 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2968 | |
2969 | ...; | |
2970 | } | |
2971 | */ | |
2fdf6df6 | 2972 | |
1fd400ff | 2973 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2974 | dw2_get_cutu (int index) |
1fd400ff TT |
2975 | { |
2976 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2977 | { | |
f4dc4d17 | 2978 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2979 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2980 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2981 | } |
2982 | ||
2983 | return dwarf2_per_objfile->all_comp_units[index]; | |
2984 | } | |
2985 | ||
8832e7e3 DE |
2986 | /* Return the CU given its index. |
2987 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2988 | refers to a CU. */ | |
f4dc4d17 DE |
2989 | |
2990 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2991 | dw2_get_cu (int index) |
f4dc4d17 | 2992 | { |
8832e7e3 | 2993 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2994 | |
1fd400ff TT |
2995 | return dwarf2_per_objfile->all_comp_units[index]; |
2996 | } | |
2997 | ||
2ec9a5e0 TT |
2998 | /* A helper for create_cus_from_index that handles a given list of |
2999 | CUs. */ | |
2fdf6df6 | 3000 | |
74a0d9f6 | 3001 | static void |
2ec9a5e0 TT |
3002 | create_cus_from_index_list (struct objfile *objfile, |
3003 | const gdb_byte *cu_list, offset_type n_elements, | |
3004 | struct dwarf2_section_info *section, | |
3005 | int is_dwz, | |
3006 | int base_offset) | |
9291a0cd TT |
3007 | { |
3008 | offset_type i; | |
9291a0cd | 3009 | |
2ec9a5e0 | 3010 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3011 | { |
74a0d9f6 | 3012 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3013 | |
3014 | sect_offset sect_off | |
3015 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3016 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3017 | cu_list += 2 * 8; |
3018 | ||
9c541725 PA |
3019 | dwarf2_per_cu_data *the_cu |
3020 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3021 | struct dwarf2_per_cu_data); | |
3022 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3023 | the_cu->length = length; |
3024 | the_cu->objfile = objfile; | |
8a0459fd | 3025 | the_cu->section = section; |
9291a0cd TT |
3026 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3027 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3028 | the_cu->is_dwz = is_dwz; |
3029 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3030 | } |
9291a0cd TT |
3031 | } |
3032 | ||
2ec9a5e0 | 3033 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3034 | the CU objects for this objfile. */ |
2ec9a5e0 | 3035 | |
74a0d9f6 | 3036 | static void |
2ec9a5e0 TT |
3037 | create_cus_from_index (struct objfile *objfile, |
3038 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3039 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3040 | { | |
3041 | struct dwz_file *dwz; | |
3042 | ||
3043 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3044 | dwarf2_per_objfile->all_comp_units = |
3045 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3046 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3047 | |
74a0d9f6 JK |
3048 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3049 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3050 | |
3051 | if (dwz_elements == 0) | |
74a0d9f6 | 3052 | return; |
2ec9a5e0 TT |
3053 | |
3054 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3055 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3056 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3057 | } |
3058 | ||
1fd400ff | 3059 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3060 | |
74a0d9f6 | 3061 | static void |
673bfd45 | 3062 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3063 | struct dwarf2_section_info *section, |
673bfd45 DE |
3064 | const gdb_byte *bytes, |
3065 | offset_type elements) | |
1fd400ff TT |
3066 | { |
3067 | offset_type i; | |
673bfd45 | 3068 | htab_t sig_types_hash; |
1fd400ff | 3069 | |
6aa5f3a6 DE |
3070 | dwarf2_per_objfile->n_type_units |
3071 | = dwarf2_per_objfile->n_allocated_type_units | |
3072 | = elements / 3; | |
8d749320 SM |
3073 | dwarf2_per_objfile->all_type_units = |
3074 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3075 | |
673bfd45 | 3076 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3077 | |
3078 | for (i = 0; i < elements; i += 3) | |
3079 | { | |
52dc124a | 3080 | struct signatured_type *sig_type; |
9c541725 | 3081 | ULONGEST signature; |
1fd400ff | 3082 | void **slot; |
9c541725 | 3083 | cu_offset type_offset_in_tu; |
1fd400ff | 3084 | |
74a0d9f6 | 3085 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3086 | sect_offset sect_off |
3087 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3088 | type_offset_in_tu | |
3089 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3090 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3091 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3092 | bytes += 3 * 8; | |
3093 | ||
52dc124a | 3094 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3095 | struct signatured_type); |
52dc124a | 3096 | sig_type->signature = signature; |
9c541725 | 3097 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3098 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3099 | sig_type->per_cu.section = section; |
9c541725 | 3100 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3101 | sig_type->per_cu.objfile = objfile; |
3102 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3103 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3104 | struct dwarf2_per_cu_quick_data); | |
3105 | ||
52dc124a DE |
3106 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3107 | *slot = sig_type; | |
1fd400ff | 3108 | |
b4dd5633 | 3109 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3110 | } |
3111 | ||
673bfd45 | 3112 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3113 | } |
3114 | ||
9291a0cd TT |
3115 | /* Read the address map data from the mapped index, and use it to |
3116 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3117 | |
9291a0cd TT |
3118 | static void |
3119 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3120 | { | |
3e29f34a | 3121 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3122 | const gdb_byte *iter, *end; |
9291a0cd | 3123 | struct addrmap *mutable_map; |
9291a0cd TT |
3124 | CORE_ADDR baseaddr; |
3125 | ||
8268c778 PA |
3126 | auto_obstack temp_obstack; |
3127 | ||
9291a0cd TT |
3128 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3129 | ||
3130 | iter = index->address_table; | |
3131 | end = iter + index->address_table_size; | |
3132 | ||
3133 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3134 | ||
3135 | while (iter < end) | |
3136 | { | |
3137 | ULONGEST hi, lo, cu_index; | |
3138 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3139 | iter += 8; | |
3140 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3141 | iter += 8; | |
3142 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3143 | iter += 4; | |
f652bce2 | 3144 | |
24a55014 | 3145 | if (lo > hi) |
f652bce2 | 3146 | { |
24a55014 DE |
3147 | complaint (&symfile_complaints, |
3148 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3149 | hex_string (lo), hex_string (hi)); |
24a55014 | 3150 | continue; |
f652bce2 | 3151 | } |
24a55014 DE |
3152 | |
3153 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3154 | { |
3155 | complaint (&symfile_complaints, | |
3156 | _(".gdb_index address table has invalid CU number %u"), | |
3157 | (unsigned) cu_index); | |
24a55014 | 3158 | continue; |
f652bce2 | 3159 | } |
24a55014 | 3160 | |
3e29f34a MR |
3161 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3162 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3163 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3164 | } |
3165 | ||
3166 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3167 | &objfile->objfile_obstack); | |
9291a0cd TT |
3168 | } |
3169 | ||
59d7bcaf JK |
3170 | /* The hash function for strings in the mapped index. This is the same as |
3171 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3172 | implementation. This is necessary because the hash function is tied to the | |
3173 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3174 | SYMBOL_HASH_NEXT. |
3175 | ||
3176 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3177 | |
9291a0cd | 3178 | static hashval_t |
559a7a62 | 3179 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3180 | { |
3181 | const unsigned char *str = (const unsigned char *) p; | |
3182 | hashval_t r = 0; | |
3183 | unsigned char c; | |
3184 | ||
3185 | while ((c = *str++) != 0) | |
559a7a62 JK |
3186 | { |
3187 | if (index_version >= 5) | |
3188 | c = tolower (c); | |
3189 | r = r * 67 + c - 113; | |
3190 | } | |
9291a0cd TT |
3191 | |
3192 | return r; | |
3193 | } | |
3194 | ||
3195 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3196 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3197 | constant pool and return true. If NAME cannot be found, return |
3198 | false. */ | |
2fdf6df6 | 3199 | |
109483d9 | 3200 | static bool |
9291a0cd TT |
3201 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3202 | offset_type **vec_out) | |
3203 | { | |
0cf03b49 | 3204 | offset_type hash; |
9291a0cd | 3205 | offset_type slot, step; |
559a7a62 | 3206 | int (*cmp) (const char *, const char *); |
9291a0cd | 3207 | |
791afaa2 | 3208 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3209 | if (current_language->la_language == language_cplus |
45280282 IB |
3210 | || current_language->la_language == language_fortran |
3211 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3212 | { |
3213 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3214 | not contain any. */ | |
a8719064 | 3215 | |
72998fb3 | 3216 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3217 | { |
109483d9 | 3218 | without_params = cp_remove_params (name); |
0cf03b49 | 3219 | |
72998fb3 | 3220 | if (without_params != NULL) |
791afaa2 | 3221 | name = without_params.get (); |
0cf03b49 JK |
3222 | } |
3223 | } | |
3224 | ||
559a7a62 | 3225 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3226 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3227 | simulate our NAME being searched is also lowercased. */ |
3228 | hash = mapped_index_string_hash ((index->version == 4 | |
3229 | && case_sensitivity == case_sensitive_off | |
3230 | ? 5 : index->version), | |
3231 | name); | |
3232 | ||
3876f04e DE |
3233 | slot = hash & (index->symbol_table_slots - 1); |
3234 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3235 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3236 | |
3237 | for (;;) | |
3238 | { | |
3239 | /* Convert a slot number to an offset into the table. */ | |
3240 | offset_type i = 2 * slot; | |
3241 | const char *str; | |
3876f04e | 3242 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
109483d9 | 3243 | return false; |
9291a0cd | 3244 | |
3876f04e | 3245 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3246 | if (!cmp (name, str)) |
9291a0cd TT |
3247 | { |
3248 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3249 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
109483d9 | 3250 | return true; |
9291a0cd TT |
3251 | } |
3252 | ||
3876f04e | 3253 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3254 | } |
3255 | } | |
3256 | ||
2ec9a5e0 TT |
3257 | /* A helper function that reads the .gdb_index from SECTION and fills |
3258 | in MAP. FILENAME is the name of the file containing the section; | |
3259 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3260 | ok to use deprecated sections. | |
3261 | ||
3262 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3263 | out parameters that are filled in with information about the CU and | |
3264 | TU lists in the section. | |
3265 | ||
3266 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3267 | |
9291a0cd | 3268 | static int |
2ec9a5e0 TT |
3269 | read_index_from_section (struct objfile *objfile, |
3270 | const char *filename, | |
3271 | int deprecated_ok, | |
3272 | struct dwarf2_section_info *section, | |
3273 | struct mapped_index *map, | |
3274 | const gdb_byte **cu_list, | |
3275 | offset_type *cu_list_elements, | |
3276 | const gdb_byte **types_list, | |
3277 | offset_type *types_list_elements) | |
9291a0cd | 3278 | { |
948f8e3d | 3279 | const gdb_byte *addr; |
2ec9a5e0 | 3280 | offset_type version; |
b3b272e1 | 3281 | offset_type *metadata; |
1fd400ff | 3282 | int i; |
9291a0cd | 3283 | |
2ec9a5e0 | 3284 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3285 | return 0; |
82430852 JK |
3286 | |
3287 | /* Older elfutils strip versions could keep the section in the main | |
3288 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3289 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3290 | return 0; |
3291 | ||
2ec9a5e0 | 3292 | dwarf2_read_section (objfile, section); |
9291a0cd | 3293 | |
2ec9a5e0 | 3294 | addr = section->buffer; |
9291a0cd | 3295 | /* Version check. */ |
1fd400ff | 3296 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3297 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3298 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3299 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3300 | indices. */ |
831adc1f | 3301 | if (version < 4) |
481860b3 GB |
3302 | { |
3303 | static int warning_printed = 0; | |
3304 | if (!warning_printed) | |
3305 | { | |
3306 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3307 | filename); |
481860b3 GB |
3308 | warning_printed = 1; |
3309 | } | |
3310 | return 0; | |
3311 | } | |
3312 | /* Index version 4 uses a different hash function than index version | |
3313 | 5 and later. | |
3314 | ||
3315 | Versions earlier than 6 did not emit psymbols for inlined | |
3316 | functions. Using these files will cause GDB not to be able to | |
3317 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3318 | indices unless the user has done |
3319 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3320 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3321 | { |
3322 | static int warning_printed = 0; | |
3323 | if (!warning_printed) | |
3324 | { | |
e615022a DE |
3325 | warning (_("\ |
3326 | Skipping deprecated .gdb_index section in %s.\n\ | |
3327 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3328 | to use the section anyway."), | |
2ec9a5e0 | 3329 | filename); |
481860b3 GB |
3330 | warning_printed = 1; |
3331 | } | |
3332 | return 0; | |
3333 | } | |
796a7ff8 | 3334 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3335 | of the TU (for symbols coming from TUs), |
3336 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3337 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3338 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3339 | These are just performance bugs, and we can't distinguish gdb-generated | |
3340 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3341 | |
481860b3 | 3342 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3343 | longer backward compatible. */ |
796a7ff8 | 3344 | if (version > 8) |
594e8718 | 3345 | return 0; |
9291a0cd | 3346 | |
559a7a62 | 3347 | map->version = version; |
2ec9a5e0 | 3348 | map->total_size = section->size; |
9291a0cd TT |
3349 | |
3350 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3351 | |
3352 | i = 0; | |
2ec9a5e0 TT |
3353 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3354 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3355 | / 8); | |
1fd400ff TT |
3356 | ++i; |
3357 | ||
2ec9a5e0 TT |
3358 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3359 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3360 | - MAYBE_SWAP (metadata[i])) | |
3361 | / 8); | |
987d643c | 3362 | ++i; |
1fd400ff TT |
3363 | |
3364 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3365 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3366 | - MAYBE_SWAP (metadata[i])); | |
3367 | ++i; | |
3368 | ||
3876f04e DE |
3369 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3370 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3371 | - MAYBE_SWAP (metadata[i])) | |
3372 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3373 | ++i; |
9291a0cd | 3374 | |
f9d83a0b | 3375 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3376 | |
2ec9a5e0 TT |
3377 | return 1; |
3378 | } | |
3379 | ||
3380 | ||
3381 | /* Read the index file. If everything went ok, initialize the "quick" | |
3382 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3383 | ||
3384 | static int | |
3385 | dwarf2_read_index (struct objfile *objfile) | |
3386 | { | |
3387 | struct mapped_index local_map, *map; | |
3388 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3389 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3390 | struct dwz_file *dwz; |
2ec9a5e0 | 3391 | |
4262abfb | 3392 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3393 | use_deprecated_index_sections, |
3394 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3395 | &cu_list, &cu_list_elements, | |
3396 | &types_list, &types_list_elements)) | |
3397 | return 0; | |
3398 | ||
0fefef59 | 3399 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3400 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3401 | return 0; |
3402 | ||
2ec9a5e0 TT |
3403 | /* If there is a .dwz file, read it so we can get its CU list as |
3404 | well. */ | |
4db1a1dc TT |
3405 | dwz = dwarf2_get_dwz_file (); |
3406 | if (dwz != NULL) | |
2ec9a5e0 | 3407 | { |
2ec9a5e0 TT |
3408 | struct mapped_index dwz_map; |
3409 | const gdb_byte *dwz_types_ignore; | |
3410 | offset_type dwz_types_elements_ignore; | |
3411 | ||
3412 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3413 | 1, | |
3414 | &dwz->gdb_index, &dwz_map, | |
3415 | &dwz_list, &dwz_list_elements, | |
3416 | &dwz_types_ignore, | |
3417 | &dwz_types_elements_ignore)) | |
3418 | { | |
3419 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3420 | bfd_get_filename (dwz->dwz_bfd)); | |
3421 | return 0; | |
3422 | } | |
3423 | } | |
3424 | ||
74a0d9f6 JK |
3425 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3426 | dwz_list_elements); | |
1fd400ff | 3427 | |
8b70b953 TT |
3428 | if (types_list_elements) |
3429 | { | |
3430 | struct dwarf2_section_info *section; | |
3431 | ||
3432 | /* We can only handle a single .debug_types when we have an | |
3433 | index. */ | |
3434 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3435 | return 0; | |
3436 | ||
3437 | section = VEC_index (dwarf2_section_info_def, | |
3438 | dwarf2_per_objfile->types, 0); | |
3439 | ||
74a0d9f6 JK |
3440 | create_signatured_type_table_from_index (objfile, section, types_list, |
3441 | types_list_elements); | |
8b70b953 | 3442 | } |
9291a0cd | 3443 | |
2ec9a5e0 TT |
3444 | create_addrmap_from_index (objfile, &local_map); |
3445 | ||
8d749320 | 3446 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
2ec9a5e0 | 3447 | *map = local_map; |
9291a0cd TT |
3448 | |
3449 | dwarf2_per_objfile->index_table = map; | |
3450 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3451 | dwarf2_per_objfile->quick_file_names_table = |
3452 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3453 | |
3454 | return 1; | |
3455 | } | |
3456 | ||
3457 | /* A helper for the "quick" functions which sets the global | |
3458 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3459 | |
9291a0cd TT |
3460 | static void |
3461 | dw2_setup (struct objfile *objfile) | |
3462 | { | |
9a3c8263 SM |
3463 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3464 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3465 | gdb_assert (dwarf2_per_objfile); |
3466 | } | |
3467 | ||
dee91e82 | 3468 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3469 | |
dee91e82 DE |
3470 | static void |
3471 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3472 | const gdb_byte *info_ptr, |
dee91e82 DE |
3473 | struct die_info *comp_unit_die, |
3474 | int has_children, | |
3475 | void *data) | |
9291a0cd | 3476 | { |
dee91e82 DE |
3477 | struct dwarf2_cu *cu = reader->cu; |
3478 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3479 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3480 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3481 | struct attribute *attr; |
dee91e82 | 3482 | int i; |
7b9f3c50 DE |
3483 | void **slot; |
3484 | struct quick_file_names *qfn; | |
9291a0cd | 3485 | |
0186c6a7 DE |
3486 | gdb_assert (! this_cu->is_debug_types); |
3487 | ||
07261596 TT |
3488 | /* Our callers never want to match partial units -- instead they |
3489 | will match the enclosing full CU. */ | |
3490 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3491 | { | |
3492 | this_cu->v.quick->no_file_data = 1; | |
3493 | return; | |
3494 | } | |
3495 | ||
0186c6a7 | 3496 | lh_cu = this_cu; |
7b9f3c50 | 3497 | slot = NULL; |
dee91e82 | 3498 | |
fff8551c | 3499 | line_header_up lh; |
9c541725 | 3500 | sect_offset line_offset {}; |
fff8551c | 3501 | |
dee91e82 | 3502 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3503 | if (attr) |
3504 | { | |
7b9f3c50 DE |
3505 | struct quick_file_names find_entry; |
3506 | ||
9c541725 | 3507 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3508 | |
3509 | /* We may have already read in this line header (TU line header sharing). | |
3510 | If we have we're done. */ | |
094b34ac | 3511 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3512 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3513 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3514 | &find_entry, INSERT); | |
3515 | if (*slot != NULL) | |
3516 | { | |
9a3c8263 | 3517 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3518 | return; |
7b9f3c50 DE |
3519 | } |
3520 | ||
3019eac3 | 3521 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3522 | } |
3523 | if (lh == NULL) | |
3524 | { | |
094b34ac | 3525 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3526 | return; |
9291a0cd TT |
3527 | } |
3528 | ||
8d749320 | 3529 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3530 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3531 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3532 | gdb_assert (slot != NULL); |
3533 | *slot = qfn; | |
9291a0cd | 3534 | |
d721ba37 | 3535 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3536 | |
fff8551c | 3537 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3538 | qfn->file_names = |
fff8551c PA |
3539 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3540 | for (i = 0; i < lh->file_names.size (); ++i) | |
3541 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3542 | qfn->real_names = NULL; |
9291a0cd | 3543 | |
094b34ac | 3544 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3545 | } |
3546 | ||
3547 | /* A helper for the "quick" functions which attempts to read the line | |
3548 | table for THIS_CU. */ | |
3549 | ||
3550 | static struct quick_file_names * | |
e4a48d9d | 3551 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3552 | { |
0186c6a7 DE |
3553 | /* This should never be called for TUs. */ |
3554 | gdb_assert (! this_cu->is_debug_types); | |
3555 | /* Nor type unit groups. */ | |
3556 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3557 | |
dee91e82 DE |
3558 | if (this_cu->v.quick->file_names != NULL) |
3559 | return this_cu->v.quick->file_names; | |
3560 | /* If we know there is no line data, no point in looking again. */ | |
3561 | if (this_cu->v.quick->no_file_data) | |
3562 | return NULL; | |
3563 | ||
0186c6a7 | 3564 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3565 | |
3566 | if (this_cu->v.quick->no_file_data) | |
3567 | return NULL; | |
3568 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3569 | } |
3570 | ||
3571 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3572 | real path for a given file name from the line table. */ |
2fdf6df6 | 3573 | |
9291a0cd | 3574 | static const char * |
7b9f3c50 DE |
3575 | dw2_get_real_path (struct objfile *objfile, |
3576 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3577 | { |
7b9f3c50 DE |
3578 | if (qfn->real_names == NULL) |
3579 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3580 | qfn->num_file_names, const char *); |
9291a0cd | 3581 | |
7b9f3c50 | 3582 | if (qfn->real_names[index] == NULL) |
14278e1f | 3583 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3584 | |
7b9f3c50 | 3585 | return qfn->real_names[index]; |
9291a0cd TT |
3586 | } |
3587 | ||
3588 | static struct symtab * | |
3589 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3590 | { | |
43f3e411 | 3591 | struct compunit_symtab *cust; |
9291a0cd | 3592 | int index; |
ae2de4f8 | 3593 | |
9291a0cd TT |
3594 | dw2_setup (objfile); |
3595 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3596 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3597 | if (cust == NULL) | |
3598 | return NULL; | |
3599 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3600 | } |
3601 | ||
7b9f3c50 DE |
3602 | /* Traversal function for dw2_forget_cached_source_info. */ |
3603 | ||
3604 | static int | |
3605 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3606 | { |
7b9f3c50 | 3607 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3608 | |
7b9f3c50 | 3609 | if (file_data->real_names) |
9291a0cd | 3610 | { |
7b9f3c50 | 3611 | int i; |
9291a0cd | 3612 | |
7b9f3c50 | 3613 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3614 | { |
7b9f3c50 DE |
3615 | xfree ((void*) file_data->real_names[i]); |
3616 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3617 | } |
3618 | } | |
7b9f3c50 DE |
3619 | |
3620 | return 1; | |
3621 | } | |
3622 | ||
3623 | static void | |
3624 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3625 | { | |
3626 | dw2_setup (objfile); | |
3627 | ||
3628 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3629 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3630 | } |
3631 | ||
f8eba3c6 TT |
3632 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3633 | the symtabs and calls the iterator. */ | |
3634 | ||
3635 | static int | |
3636 | dw2_map_expand_apply (struct objfile *objfile, | |
3637 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3638 | const char *name, const char *real_path, |
14bc53a8 | 3639 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3640 | { |
43f3e411 | 3641 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3642 | |
3643 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3644 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3645 | return 0; |
3646 | ||
3647 | /* This may expand more than one symtab, and we want to iterate over | |
3648 | all of them. */ | |
a0f42c21 | 3649 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3650 | |
14bc53a8 PA |
3651 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3652 | last_made, callback); | |
f8eba3c6 TT |
3653 | } |
3654 | ||
3655 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3656 | ||
14bc53a8 PA |
3657 | static bool |
3658 | dw2_map_symtabs_matching_filename | |
3659 | (struct objfile *objfile, const char *name, const char *real_path, | |
3660 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3661 | { |
3662 | int i; | |
c011a4f4 | 3663 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3664 | |
3665 | dw2_setup (objfile); | |
ae2de4f8 | 3666 | |
848e3e78 DE |
3667 | /* The rule is CUs specify all the files, including those used by |
3668 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3669 | |
848e3e78 | 3670 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3671 | { |
3672 | int j; | |
8832e7e3 | 3673 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3674 | struct quick_file_names *file_data; |
9291a0cd | 3675 | |
3d7bb9d9 | 3676 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3677 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3678 | continue; |
3679 | ||
e4a48d9d | 3680 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3681 | if (file_data == NULL) |
9291a0cd TT |
3682 | continue; |
3683 | ||
7b9f3c50 | 3684 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3685 | { |
7b9f3c50 | 3686 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3687 | const char *this_real_name; |
9291a0cd | 3688 | |
af529f8f | 3689 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3690 | { |
f5b95b50 | 3691 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3692 | callback)) |
3693 | return true; | |
288e77a7 | 3694 | continue; |
4aac40c8 | 3695 | } |
9291a0cd | 3696 | |
c011a4f4 DE |
3697 | /* Before we invoke realpath, which can get expensive when many |
3698 | files are involved, do a quick comparison of the basenames. */ | |
3699 | if (! basenames_may_differ | |
3700 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3701 | continue; | |
3702 | ||
da235a7c JK |
3703 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3704 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3705 | { |
da235a7c | 3706 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3707 | callback)) |
3708 | return true; | |
288e77a7 | 3709 | continue; |
da235a7c | 3710 | } |
9291a0cd | 3711 | |
da235a7c JK |
3712 | if (real_path != NULL) |
3713 | { | |
af529f8f JK |
3714 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3715 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3716 | if (this_real_name != NULL |
af529f8f | 3717 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3718 | { |
f5b95b50 | 3719 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3720 | callback)) |
3721 | return true; | |
288e77a7 | 3722 | continue; |
9291a0cd TT |
3723 | } |
3724 | } | |
3725 | } | |
3726 | } | |
3727 | ||
14bc53a8 | 3728 | return false; |
9291a0cd TT |
3729 | } |
3730 | ||
da51c347 DE |
3731 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3732 | ||
3733 | struct dw2_symtab_iterator | |
9291a0cd | 3734 | { |
da51c347 DE |
3735 | /* The internalized form of .gdb_index. */ |
3736 | struct mapped_index *index; | |
3737 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3738 | int want_specific_block; | |
3739 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3740 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3741 | int block_index; | |
3742 | /* The kind of symbol we're looking for. */ | |
3743 | domain_enum domain; | |
3744 | /* The list of CUs from the index entry of the symbol, | |
3745 | or NULL if not found. */ | |
3746 | offset_type *vec; | |
3747 | /* The next element in VEC to look at. */ | |
3748 | int next; | |
3749 | /* The number of elements in VEC, or zero if there is no match. */ | |
3750 | int length; | |
8943b874 DE |
3751 | /* Have we seen a global version of the symbol? |
3752 | If so we can ignore all further global instances. | |
3753 | This is to work around gold/15646, inefficient gold-generated | |
3754 | indices. */ | |
3755 | int global_seen; | |
da51c347 | 3756 | }; |
9291a0cd | 3757 | |
da51c347 DE |
3758 | /* Initialize the index symtab iterator ITER. |
3759 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3760 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3761 | |
9291a0cd | 3762 | static void |
da51c347 DE |
3763 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3764 | struct mapped_index *index, | |
3765 | int want_specific_block, | |
3766 | int block_index, | |
3767 | domain_enum domain, | |
3768 | const char *name) | |
3769 | { | |
3770 | iter->index = index; | |
3771 | iter->want_specific_block = want_specific_block; | |
3772 | iter->block_index = block_index; | |
3773 | iter->domain = domain; | |
3774 | iter->next = 0; | |
8943b874 | 3775 | iter->global_seen = 0; |
da51c347 DE |
3776 | |
3777 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3778 | iter->length = MAYBE_SWAP (*iter->vec); | |
3779 | else | |
3780 | { | |
3781 | iter->vec = NULL; | |
3782 | iter->length = 0; | |
3783 | } | |
3784 | } | |
3785 | ||
3786 | /* Return the next matching CU or NULL if there are no more. */ | |
3787 | ||
3788 | static struct dwarf2_per_cu_data * | |
3789 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3790 | { | |
3791 | for ( ; iter->next < iter->length; ++iter->next) | |
3792 | { | |
3793 | offset_type cu_index_and_attrs = | |
3794 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3795 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3796 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3797 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3798 | /* This value is only valid for index versions >= 7. */ | |
3799 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3800 | gdb_index_symbol_kind symbol_kind = | |
3801 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3802 | /* Only check the symbol attributes if they're present. | |
3803 | Indices prior to version 7 don't record them, | |
3804 | and indices >= 7 may elide them for certain symbols | |
3805 | (gold does this). */ | |
3806 | int attrs_valid = | |
3807 | (iter->index->version >= 7 | |
3808 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3809 | ||
3190f0c6 DE |
3810 | /* Don't crash on bad data. */ |
3811 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3812 | + dwarf2_per_objfile->n_type_units)) | |
3813 | { | |
3814 | complaint (&symfile_complaints, | |
3815 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3816 | " [in module %s]"), |
3817 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3818 | continue; |
3819 | } | |
3820 | ||
8832e7e3 | 3821 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3822 | |
da51c347 | 3823 | /* Skip if already read in. */ |
43f3e411 | 3824 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3825 | continue; |
3826 | ||
8943b874 DE |
3827 | /* Check static vs global. */ |
3828 | if (attrs_valid) | |
3829 | { | |
3830 | if (iter->want_specific_block | |
3831 | && want_static != is_static) | |
3832 | continue; | |
3833 | /* Work around gold/15646. */ | |
3834 | if (!is_static && iter->global_seen) | |
3835 | continue; | |
3836 | if (!is_static) | |
3837 | iter->global_seen = 1; | |
3838 | } | |
da51c347 DE |
3839 | |
3840 | /* Only check the symbol's kind if it has one. */ | |
3841 | if (attrs_valid) | |
3842 | { | |
3843 | switch (iter->domain) | |
3844 | { | |
3845 | case VAR_DOMAIN: | |
3846 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3847 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3848 | /* Some types are also in VAR_DOMAIN. */ | |
3849 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3850 | continue; | |
3851 | break; | |
3852 | case STRUCT_DOMAIN: | |
3853 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3854 | continue; | |
3855 | break; | |
3856 | case LABEL_DOMAIN: | |
3857 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3858 | continue; | |
3859 | break; | |
3860 | default: | |
3861 | break; | |
3862 | } | |
3863 | } | |
3864 | ||
3865 | ++iter->next; | |
3866 | return per_cu; | |
3867 | } | |
3868 | ||
3869 | return NULL; | |
3870 | } | |
3871 | ||
43f3e411 | 3872 | static struct compunit_symtab * |
da51c347 DE |
3873 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3874 | const char *name, domain_enum domain) | |
9291a0cd | 3875 | { |
43f3e411 | 3876 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3877 | struct mapped_index *index; |
3878 | ||
9291a0cd TT |
3879 | dw2_setup (objfile); |
3880 | ||
156942c7 DE |
3881 | index = dwarf2_per_objfile->index_table; |
3882 | ||
da51c347 | 3883 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3884 | if (index) |
9291a0cd | 3885 | { |
da51c347 DE |
3886 | struct dw2_symtab_iterator iter; |
3887 | struct dwarf2_per_cu_data *per_cu; | |
3888 | ||
3889 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3890 | |
da51c347 | 3891 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3892 | { |
b2e2f908 | 3893 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3894 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3895 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3896 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3897 | |
b2e2f908 DE |
3898 | sym = block_find_symbol (block, name, domain, |
3899 | block_find_non_opaque_type_preferred, | |
3900 | &with_opaque); | |
3901 | ||
da51c347 DE |
3902 | /* Some caution must be observed with overloaded functions |
3903 | and methods, since the index will not contain any overload | |
3904 | information (but NAME might contain it). */ | |
da51c347 | 3905 | |
b2e2f908 | 3906 | if (sym != NULL |
a778f165 | 3907 | && SYMBOL_MATCHES_SEARCH_NAME (sym, name)) |
b2e2f908 DE |
3908 | return stab; |
3909 | if (with_opaque != NULL | |
a778f165 | 3910 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, name)) |
b2e2f908 | 3911 | stab_best = stab; |
da51c347 DE |
3912 | |
3913 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3914 | } |
3915 | } | |
9291a0cd | 3916 | |
da51c347 | 3917 | return stab_best; |
9291a0cd TT |
3918 | } |
3919 | ||
3920 | static void | |
3921 | dw2_print_stats (struct objfile *objfile) | |
3922 | { | |
e4a48d9d | 3923 | int i, total, count; |
9291a0cd TT |
3924 | |
3925 | dw2_setup (objfile); | |
e4a48d9d | 3926 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3927 | count = 0; |
e4a48d9d | 3928 | for (i = 0; i < total; ++i) |
9291a0cd | 3929 | { |
8832e7e3 | 3930 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3931 | |
43f3e411 | 3932 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3933 | ++count; |
3934 | } | |
e4a48d9d | 3935 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3936 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3937 | } | |
3938 | ||
779bd270 DE |
3939 | /* This dumps minimal information about the index. |
3940 | It is called via "mt print objfiles". | |
3941 | One use is to verify .gdb_index has been loaded by the | |
3942 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3943 | ||
9291a0cd TT |
3944 | static void |
3945 | dw2_dump (struct objfile *objfile) | |
3946 | { | |
779bd270 DE |
3947 | dw2_setup (objfile); |
3948 | gdb_assert (dwarf2_per_objfile->using_index); | |
3949 | printf_filtered (".gdb_index:"); | |
3950 | if (dwarf2_per_objfile->index_table != NULL) | |
3951 | { | |
3952 | printf_filtered (" version %d\n", | |
3953 | dwarf2_per_objfile->index_table->version); | |
3954 | } | |
3955 | else | |
3956 | printf_filtered (" faked for \"readnow\"\n"); | |
3957 | printf_filtered ("\n"); | |
9291a0cd TT |
3958 | } |
3959 | ||
3960 | static void | |
3189cb12 DE |
3961 | dw2_relocate (struct objfile *objfile, |
3962 | const struct section_offsets *new_offsets, | |
3963 | const struct section_offsets *delta) | |
9291a0cd TT |
3964 | { |
3965 | /* There's nothing to relocate here. */ | |
3966 | } | |
3967 | ||
3968 | static void | |
3969 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3970 | const char *func_name) | |
3971 | { | |
da51c347 DE |
3972 | struct mapped_index *index; |
3973 | ||
3974 | dw2_setup (objfile); | |
3975 | ||
3976 | index = dwarf2_per_objfile->index_table; | |
3977 | ||
3978 | /* index is NULL if OBJF_READNOW. */ | |
3979 | if (index) | |
3980 | { | |
3981 | struct dw2_symtab_iterator iter; | |
3982 | struct dwarf2_per_cu_data *per_cu; | |
3983 | ||
3984 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3985 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3986 | func_name); | |
3987 | ||
3988 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3989 | dw2_instantiate_symtab (per_cu); | |
3990 | } | |
9291a0cd TT |
3991 | } |
3992 | ||
3993 | static void | |
3994 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3995 | { | |
3996 | int i; | |
3997 | ||
3998 | dw2_setup (objfile); | |
1fd400ff TT |
3999 | |
4000 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4001 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4002 | { |
8832e7e3 | 4003 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4004 | |
a0f42c21 | 4005 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4006 | } |
4007 | } | |
4008 | ||
4009 | static void | |
652a8996 JK |
4010 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4011 | const char *fullname) | |
9291a0cd TT |
4012 | { |
4013 | int i; | |
4014 | ||
4015 | dw2_setup (objfile); | |
d4637a04 DE |
4016 | |
4017 | /* We don't need to consider type units here. | |
4018 | This is only called for examining code, e.g. expand_line_sal. | |
4019 | There can be an order of magnitude (or more) more type units | |
4020 | than comp units, and we avoid them if we can. */ | |
4021 | ||
4022 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4023 | { |
4024 | int j; | |
8832e7e3 | 4025 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4026 | struct quick_file_names *file_data; |
9291a0cd | 4027 | |
3d7bb9d9 | 4028 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4029 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4030 | continue; |
4031 | ||
e4a48d9d | 4032 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4033 | if (file_data == NULL) |
9291a0cd TT |
4034 | continue; |
4035 | ||
7b9f3c50 | 4036 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4037 | { |
652a8996 JK |
4038 | const char *this_fullname = file_data->file_names[j]; |
4039 | ||
4040 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4041 | { |
a0f42c21 | 4042 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4043 | break; |
4044 | } | |
4045 | } | |
4046 | } | |
4047 | } | |
4048 | ||
9291a0cd | 4049 | static void |
ade7ed9e | 4050 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4051 | const char * name, domain_enum domain, |
ade7ed9e | 4052 | int global, |
40658b94 PH |
4053 | int (*callback) (struct block *, |
4054 | struct symbol *, void *), | |
2edb89d3 JK |
4055 | void *data, symbol_compare_ftype *match, |
4056 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 4057 | { |
40658b94 | 4058 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4059 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4060 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4061 | } |
4062 | ||
4063 | static void | |
f8eba3c6 TT |
4064 | dw2_expand_symtabs_matching |
4065 | (struct objfile *objfile, | |
14bc53a8 PA |
4066 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4067 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4068 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4069 | enum search_domain kind) | |
9291a0cd TT |
4070 | { |
4071 | int i; | |
4072 | offset_type iter; | |
4b5246aa | 4073 | struct mapped_index *index; |
9291a0cd TT |
4074 | |
4075 | dw2_setup (objfile); | |
ae2de4f8 DE |
4076 | |
4077 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
4078 | if (!dwarf2_per_objfile->index_table) |
4079 | return; | |
4b5246aa | 4080 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 4081 | |
7b08b9eb | 4082 | if (file_matcher != NULL) |
24c79950 | 4083 | { |
fc4007c9 TT |
4084 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, |
4085 | htab_eq_pointer, | |
4086 | NULL, xcalloc, xfree)); | |
4087 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
4088 | htab_eq_pointer, | |
4089 | NULL, xcalloc, xfree)); | |
24c79950 | 4090 | |
848e3e78 DE |
4091 | /* The rule is CUs specify all the files, including those used by |
4092 | any TU, so there's no need to scan TUs here. */ | |
4093 | ||
4094 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
4095 | { |
4096 | int j; | |
8832e7e3 | 4097 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
4098 | struct quick_file_names *file_data; |
4099 | void **slot; | |
7b08b9eb | 4100 | |
61d96d7e DE |
4101 | QUIT; |
4102 | ||
24c79950 | 4103 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 4104 | |
24c79950 | 4105 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4106 | if (per_cu->v.quick->compunit_symtab) |
24c79950 | 4107 | continue; |
7b08b9eb | 4108 | |
e4a48d9d | 4109 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
4110 | if (file_data == NULL) |
4111 | continue; | |
7b08b9eb | 4112 | |
fc4007c9 | 4113 | if (htab_find (visited_not_found.get (), file_data) != NULL) |
24c79950 | 4114 | continue; |
fc4007c9 | 4115 | else if (htab_find (visited_found.get (), file_data) != NULL) |
24c79950 TT |
4116 | { |
4117 | per_cu->v.quick->mark = 1; | |
4118 | continue; | |
4119 | } | |
4120 | ||
4121 | for (j = 0; j < file_data->num_file_names; ++j) | |
4122 | { | |
da235a7c JK |
4123 | const char *this_real_name; |
4124 | ||
14bc53a8 | 4125 | if (file_matcher (file_data->file_names[j], false)) |
24c79950 TT |
4126 | { |
4127 | per_cu->v.quick->mark = 1; | |
4128 | break; | |
4129 | } | |
da235a7c JK |
4130 | |
4131 | /* Before we invoke realpath, which can get expensive when many | |
4132 | files are involved, do a quick comparison of the basenames. */ | |
4133 | if (!basenames_may_differ | |
4134 | && !file_matcher (lbasename (file_data->file_names[j]), | |
14bc53a8 | 4135 | true)) |
da235a7c JK |
4136 | continue; |
4137 | ||
4138 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
14bc53a8 | 4139 | if (file_matcher (this_real_name, false)) |
da235a7c JK |
4140 | { |
4141 | per_cu->v.quick->mark = 1; | |
4142 | break; | |
4143 | } | |
24c79950 TT |
4144 | } |
4145 | ||
4146 | slot = htab_find_slot (per_cu->v.quick->mark | |
fc4007c9 TT |
4147 | ? visited_found.get () |
4148 | : visited_not_found.get (), | |
24c79950 TT |
4149 | file_data, INSERT); |
4150 | *slot = file_data; | |
4151 | } | |
24c79950 | 4152 | } |
9291a0cd | 4153 | |
3876f04e | 4154 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
4155 | { |
4156 | offset_type idx = 2 * iter; | |
4157 | const char *name; | |
4158 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 4159 | int global_seen = 0; |
9291a0cd | 4160 | |
61d96d7e DE |
4161 | QUIT; |
4162 | ||
3876f04e | 4163 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
4164 | continue; |
4165 | ||
3876f04e | 4166 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 4167 | |
14bc53a8 | 4168 | if (!symbol_matcher (name)) |
9291a0cd TT |
4169 | continue; |
4170 | ||
4171 | /* The name was matched, now expand corresponding CUs that were | |
4172 | marked. */ | |
4b5246aa | 4173 | vec = (offset_type *) (index->constant_pool |
3876f04e | 4174 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
4175 | vec_len = MAYBE_SWAP (vec[0]); |
4176 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4177 | { | |
e254ef6a | 4178 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 4179 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
4180 | /* This value is only valid for index versions >= 7. */ |
4181 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
4182 | gdb_index_symbol_kind symbol_kind = |
4183 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4184 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
4185 | /* Only check the symbol attributes if they're present. |
4186 | Indices prior to version 7 don't record them, | |
4187 | and indices >= 7 may elide them for certain symbols | |
4188 | (gold does this). */ | |
4189 | int attrs_valid = | |
4190 | (index->version >= 7 | |
4191 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4192 | ||
8943b874 DE |
4193 | /* Work around gold/15646. */ |
4194 | if (attrs_valid) | |
4195 | { | |
4196 | if (!is_static && global_seen) | |
4197 | continue; | |
4198 | if (!is_static) | |
4199 | global_seen = 1; | |
4200 | } | |
4201 | ||
3190f0c6 DE |
4202 | /* Only check the symbol's kind if it has one. */ |
4203 | if (attrs_valid) | |
156942c7 DE |
4204 | { |
4205 | switch (kind) | |
4206 | { | |
4207 | case VARIABLES_DOMAIN: | |
4208 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4209 | continue; | |
4210 | break; | |
4211 | case FUNCTIONS_DOMAIN: | |
4212 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
4213 | continue; | |
4214 | break; | |
4215 | case TYPES_DOMAIN: | |
4216 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4217 | continue; | |
4218 | break; | |
4219 | default: | |
4220 | break; | |
4221 | } | |
4222 | } | |
4223 | ||
3190f0c6 DE |
4224 | /* Don't crash on bad data. */ |
4225 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4226 | + dwarf2_per_objfile->n_type_units)) | |
4227 | { | |
4228 | complaint (&symfile_complaints, | |
4229 | _(".gdb_index entry has bad CU index" | |
4262abfb | 4230 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
4231 | continue; |
4232 | } | |
4233 | ||
8832e7e3 | 4234 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 4235 | if (file_matcher == NULL || per_cu->v.quick->mark) |
276d885b GB |
4236 | { |
4237 | int symtab_was_null = | |
4238 | (per_cu->v.quick->compunit_symtab == NULL); | |
4239 | ||
4240 | dw2_instantiate_symtab (per_cu); | |
4241 | ||
4242 | if (expansion_notify != NULL | |
4243 | && symtab_was_null | |
4244 | && per_cu->v.quick->compunit_symtab != NULL) | |
4245 | { | |
14bc53a8 | 4246 | expansion_notify (per_cu->v.quick->compunit_symtab); |
276d885b GB |
4247 | } |
4248 | } | |
9291a0cd TT |
4249 | } |
4250 | } | |
4251 | } | |
4252 | ||
43f3e411 | 4253 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4254 | symtab. */ |
4255 | ||
43f3e411 DE |
4256 | static struct compunit_symtab * |
4257 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4258 | CORE_ADDR pc) | |
9703b513 TT |
4259 | { |
4260 | int i; | |
4261 | ||
43f3e411 DE |
4262 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4263 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4264 | return cust; | |
9703b513 | 4265 | |
43f3e411 | 4266 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4267 | return NULL; |
4268 | ||
43f3e411 | 4269 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4270 | { |
43f3e411 | 4271 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4272 | |
43f3e411 | 4273 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4274 | if (s != NULL) |
4275 | return s; | |
4276 | } | |
4277 | ||
4278 | return NULL; | |
4279 | } | |
4280 | ||
43f3e411 DE |
4281 | static struct compunit_symtab * |
4282 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4283 | struct bound_minimal_symbol msymbol, | |
4284 | CORE_ADDR pc, | |
4285 | struct obj_section *section, | |
4286 | int warn_if_readin) | |
9291a0cd TT |
4287 | { |
4288 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4289 | struct compunit_symtab *result; |
9291a0cd TT |
4290 | |
4291 | dw2_setup (objfile); | |
4292 | ||
4293 | if (!objfile->psymtabs_addrmap) | |
4294 | return NULL; | |
4295 | ||
9a3c8263 SM |
4296 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4297 | pc); | |
9291a0cd TT |
4298 | if (!data) |
4299 | return NULL; | |
4300 | ||
43f3e411 | 4301 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4302 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4303 | paddress (get_objfile_arch (objfile), pc)); |
4304 | ||
43f3e411 DE |
4305 | result |
4306 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4307 | pc); | |
9703b513 TT |
4308 | gdb_assert (result != NULL); |
4309 | return result; | |
9291a0cd TT |
4310 | } |
4311 | ||
9291a0cd | 4312 | static void |
44b13c5a | 4313 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4314 | void *data, int need_fullname) |
9291a0cd | 4315 | { |
9291a0cd | 4316 | dw2_setup (objfile); |
ae2de4f8 | 4317 | |
bbf2f4df | 4318 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 4319 | { |
bbf2f4df | 4320 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 4321 | |
bbf2f4df PA |
4322 | htab_up visited (htab_create_alloc (10, |
4323 | htab_hash_pointer, htab_eq_pointer, | |
4324 | NULL, xcalloc, xfree)); | |
24c79950 | 4325 | |
bbf2f4df PA |
4326 | /* The rule is CUs specify all the files, including those used |
4327 | by any TU, so there's no need to scan TUs here. We can | |
4328 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 4329 | |
bbf2f4df PA |
4330 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
4331 | { | |
4332 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 4333 | |
bbf2f4df PA |
4334 | if (per_cu->v.quick->compunit_symtab) |
4335 | { | |
4336 | void **slot = htab_find_slot (visited.get (), | |
4337 | per_cu->v.quick->file_names, | |
4338 | INSERT); | |
9291a0cd | 4339 | |
bbf2f4df PA |
4340 | *slot = per_cu->v.quick->file_names; |
4341 | } | |
24c79950 | 4342 | } |
24c79950 | 4343 | |
bbf2f4df | 4344 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 4345 | { |
bbf2f4df PA |
4346 | int j; |
4347 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4348 | struct quick_file_names *file_data; | |
4349 | void **slot; | |
4350 | ||
4351 | /* We only need to look at symtabs not already expanded. */ | |
4352 | if (per_cu->v.quick->compunit_symtab) | |
4353 | continue; | |
74e2f255 | 4354 | |
bbf2f4df PA |
4355 | file_data = dw2_get_file_names (per_cu); |
4356 | if (file_data == NULL) | |
4357 | continue; | |
4358 | ||
4359 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
4360 | if (*slot) | |
4361 | { | |
4362 | /* Already visited. */ | |
4363 | continue; | |
4364 | } | |
4365 | *slot = file_data; | |
4366 | ||
4367 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4368 | { | |
4369 | const char *filename = file_data->file_names[j]; | |
4370 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4371 | } | |
9291a0cd TT |
4372 | } |
4373 | } | |
bbf2f4df PA |
4374 | |
4375 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4376 | { | |
14278e1f | 4377 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
4378 | |
4379 | if (need_fullname) | |
4380 | this_real_name = gdb_realpath (filename); | |
14278e1f | 4381 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 4382 | }); |
9291a0cd TT |
4383 | } |
4384 | ||
4385 | static int | |
4386 | dw2_has_symbols (struct objfile *objfile) | |
4387 | { | |
4388 | return 1; | |
4389 | } | |
4390 | ||
4391 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4392 | { | |
4393 | dw2_has_symbols, | |
4394 | dw2_find_last_source_symtab, | |
4395 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4396 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4397 | dw2_lookup_symbol, |
9291a0cd TT |
4398 | dw2_print_stats, |
4399 | dw2_dump, | |
4400 | dw2_relocate, | |
4401 | dw2_expand_symtabs_for_function, | |
4402 | dw2_expand_all_symtabs, | |
652a8996 | 4403 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4404 | dw2_map_matching_symbols, |
9291a0cd | 4405 | dw2_expand_symtabs_matching, |
43f3e411 | 4406 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
4407 | dw2_map_symbol_filenames |
4408 | }; | |
4409 | ||
4410 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4411 | file will use psymtabs, or 1 if using the GNU index. */ | |
4412 | ||
4413 | int | |
4414 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4415 | { | |
4416 | /* If we're about to read full symbols, don't bother with the | |
4417 | indices. In this case we also don't care if some other debug | |
4418 | format is making psymtabs, because they are all about to be | |
4419 | expanded anyway. */ | |
4420 | if ((objfile->flags & OBJF_READNOW)) | |
4421 | { | |
4422 | int i; | |
4423 | ||
4424 | dwarf2_per_objfile->using_index = 1; | |
4425 | create_all_comp_units (objfile); | |
0e50663e | 4426 | create_all_type_units (objfile); |
7b9f3c50 DE |
4427 | dwarf2_per_objfile->quick_file_names_table = |
4428 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4429 | |
1fd400ff | 4430 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4431 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4432 | { |
8832e7e3 | 4433 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4434 | |
e254ef6a DE |
4435 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4436 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4437 | } |
4438 | ||
4439 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4440 | these functions will be no-ops because we will have expanded | |
4441 | all symtabs. */ | |
4442 | return 1; | |
4443 | } | |
4444 | ||
4445 | if (dwarf2_read_index (objfile)) | |
4446 | return 1; | |
4447 | ||
9291a0cd TT |
4448 | return 0; |
4449 | } | |
4450 | ||
4451 | \f | |
4452 | ||
dce234bc PP |
4453 | /* Build a partial symbol table. */ |
4454 | ||
4455 | void | |
f29dff0a | 4456 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4457 | { |
c9bf0622 | 4458 | |
af5bf4ad SM |
4459 | if (objfile->global_psymbols.capacity () == 0 |
4460 | && objfile->static_psymbols.capacity () == 0) | |
4461 | init_psymbol_list (objfile, 1024); | |
c906108c | 4462 | |
492d29ea | 4463 | TRY |
c9bf0622 TT |
4464 | { |
4465 | /* This isn't really ideal: all the data we allocate on the | |
4466 | objfile's obstack is still uselessly kept around. However, | |
4467 | freeing it seems unsafe. */ | |
906768f9 | 4468 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 4469 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 4470 | psymtabs.keep (); |
c9bf0622 | 4471 | } |
492d29ea PA |
4472 | CATCH (except, RETURN_MASK_ERROR) |
4473 | { | |
4474 | exception_print (gdb_stderr, except); | |
4475 | } | |
4476 | END_CATCH | |
c906108c | 4477 | } |
c906108c | 4478 | |
1ce1cefd DE |
4479 | /* Return the total length of the CU described by HEADER. */ |
4480 | ||
4481 | static unsigned int | |
4482 | get_cu_length (const struct comp_unit_head *header) | |
4483 | { | |
4484 | return header->initial_length_size + header->length; | |
4485 | } | |
4486 | ||
9c541725 | 4487 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 4488 | |
9c541725 PA |
4489 | static inline bool |
4490 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 4491 | { |
9c541725 PA |
4492 | sect_offset bottom = cu_header->sect_off; |
4493 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 4494 | |
9c541725 | 4495 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
4496 | } |
4497 | ||
3b80fe9b DE |
4498 | /* Find the base address of the compilation unit for range lists and |
4499 | location lists. It will normally be specified by DW_AT_low_pc. | |
4500 | In DWARF-3 draft 4, the base address could be overridden by | |
4501 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4502 | compilation units with discontinuous ranges. */ | |
4503 | ||
4504 | static void | |
4505 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4506 | { | |
4507 | struct attribute *attr; | |
4508 | ||
4509 | cu->base_known = 0; | |
4510 | cu->base_address = 0; | |
4511 | ||
4512 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4513 | if (attr) | |
4514 | { | |
31aa7e4e | 4515 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4516 | cu->base_known = 1; |
4517 | } | |
4518 | else | |
4519 | { | |
4520 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4521 | if (attr) | |
4522 | { | |
31aa7e4e | 4523 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4524 | cu->base_known = 1; |
4525 | } | |
4526 | } | |
4527 | } | |
4528 | ||
93311388 | 4529 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 4530 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
4531 | NOTE: This leaves members offset, first_die_offset to be filled in |
4532 | by the caller. */ | |
107d2387 | 4533 | |
d521ce57 | 4534 | static const gdb_byte * |
107d2387 | 4535 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
4536 | const gdb_byte *info_ptr, |
4537 | struct dwarf2_section_info *section, | |
4538 | rcuh_kind section_kind) | |
107d2387 AC |
4539 | { |
4540 | int signed_addr; | |
891d2f0b | 4541 | unsigned int bytes_read; |
43988095 JK |
4542 | const char *filename = get_section_file_name (section); |
4543 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
4544 | |
4545 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4546 | cu_header->initial_length_size = bytes_read; | |
4547 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4548 | info_ptr += bytes_read; |
107d2387 AC |
4549 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4550 | info_ptr += 2; | |
43988095 JK |
4551 | if (cu_header->version < 5) |
4552 | switch (section_kind) | |
4553 | { | |
4554 | case rcuh_kind::COMPILE: | |
4555 | cu_header->unit_type = DW_UT_compile; | |
4556 | break; | |
4557 | case rcuh_kind::TYPE: | |
4558 | cu_header->unit_type = DW_UT_type; | |
4559 | break; | |
4560 | default: | |
4561 | internal_error (__FILE__, __LINE__, | |
4562 | _("read_comp_unit_head: invalid section_kind")); | |
4563 | } | |
4564 | else | |
4565 | { | |
4566 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
4567 | (read_1_byte (abfd, info_ptr)); | |
4568 | info_ptr += 1; | |
4569 | switch (cu_header->unit_type) | |
4570 | { | |
4571 | case DW_UT_compile: | |
4572 | if (section_kind != rcuh_kind::COMPILE) | |
4573 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
4574 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
4575 | filename); | |
4576 | break; | |
4577 | case DW_UT_type: | |
4578 | section_kind = rcuh_kind::TYPE; | |
4579 | break; | |
4580 | default: | |
4581 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
4582 | "(is %d, should be %d or %d) [in module %s]"), | |
4583 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
4584 | } | |
4585 | ||
4586 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
4587 | info_ptr += 1; | |
4588 | } | |
9c541725 PA |
4589 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
4590 | cu_header, | |
4591 | &bytes_read); | |
613e1657 | 4592 | info_ptr += bytes_read; |
43988095 JK |
4593 | if (cu_header->version < 5) |
4594 | { | |
4595 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
4596 | info_ptr += 1; | |
4597 | } | |
107d2387 AC |
4598 | signed_addr = bfd_get_sign_extend_vma (abfd); |
4599 | if (signed_addr < 0) | |
8e65ff28 | 4600 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4601 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4602 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4603 | |
43988095 JK |
4604 | if (section_kind == rcuh_kind::TYPE) |
4605 | { | |
4606 | LONGEST type_offset; | |
4607 | ||
4608 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
4609 | info_ptr += 8; | |
4610 | ||
4611 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
4612 | info_ptr += bytes_read; | |
9c541725 PA |
4613 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
4614 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
4615 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
4616 | "header (is %s) [in module %s]"), plongest (type_offset), | |
4617 | filename); | |
4618 | } | |
4619 | ||
107d2387 AC |
4620 | return info_ptr; |
4621 | } | |
4622 | ||
36586728 TT |
4623 | /* Helper function that returns the proper abbrev section for |
4624 | THIS_CU. */ | |
4625 | ||
4626 | static struct dwarf2_section_info * | |
4627 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4628 | { | |
4629 | struct dwarf2_section_info *abbrev; | |
4630 | ||
4631 | if (this_cu->is_dwz) | |
4632 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4633 | else | |
4634 | abbrev = &dwarf2_per_objfile->abbrev; | |
4635 | ||
4636 | return abbrev; | |
4637 | } | |
4638 | ||
9ff913ba DE |
4639 | /* Subroutine of read_and_check_comp_unit_head and |
4640 | read_and_check_type_unit_head to simplify them. | |
4641 | Perform various error checking on the header. */ | |
4642 | ||
4643 | static void | |
4644 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4645 | struct dwarf2_section_info *section, |
4646 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4647 | { |
a32a8923 | 4648 | const char *filename = get_section_file_name (section); |
9ff913ba | 4649 | |
43988095 | 4650 | if (header->version < 2 || header->version > 5) |
9ff913ba | 4651 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 4652 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
4653 | filename); |
4654 | ||
9c541725 | 4655 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 4656 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
4657 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
4658 | "(offset 0x%x + 6) [in module %s]"), | |
4659 | to_underlying (header->abbrev_sect_off), | |
4660 | to_underlying (header->sect_off), | |
9ff913ba DE |
4661 | filename); |
4662 | ||
9c541725 | 4663 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 4664 | avoid potential 32-bit overflow. */ |
9c541725 | 4665 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 4666 | > section->size) |
9c541725 PA |
4667 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
4668 | "(offset 0x%x + 0) [in module %s]"), | |
4669 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
4670 | filename); |
4671 | } | |
4672 | ||
4673 | /* Read in a CU/TU header and perform some basic error checking. | |
4674 | The contents of the header are stored in HEADER. | |
4675 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4676 | |
d521ce57 | 4677 | static const gdb_byte * |
9ff913ba DE |
4678 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4679 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4680 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4681 | const gdb_byte *info_ptr, |
43988095 | 4682 | rcuh_kind section_kind) |
72bf9492 | 4683 | { |
d521ce57 | 4684 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4685 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4686 | |
9c541725 | 4687 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 4688 | |
43988095 | 4689 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 4690 | |
9c541725 | 4691 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 4692 | |
4bdcc0c1 | 4693 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4694 | |
4695 | return info_ptr; | |
348e048f DE |
4696 | } |
4697 | ||
f4dc4d17 DE |
4698 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4699 | ||
4700 | static sect_offset | |
4701 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 4702 | sect_offset sect_off) |
f4dc4d17 | 4703 | { |
a32a8923 | 4704 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4705 | const gdb_byte *info_ptr; |
ac298888 | 4706 | unsigned int initial_length_size, offset_size; |
43988095 | 4707 | uint16_t version; |
f4dc4d17 DE |
4708 | |
4709 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 4710 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 4711 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 4712 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
4713 | info_ptr += initial_length_size; |
4714 | ||
4715 | version = read_2_bytes (abfd, info_ptr); | |
4716 | info_ptr += 2; | |
4717 | if (version >= 5) | |
4718 | { | |
4719 | /* Skip unit type and address size. */ | |
4720 | info_ptr += 2; | |
4721 | } | |
4722 | ||
9c541725 | 4723 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
4724 | } |
4725 | ||
aaa75496 JB |
4726 | /* Allocate a new partial symtab for file named NAME and mark this new |
4727 | partial symtab as being an include of PST. */ | |
4728 | ||
4729 | static void | |
d521ce57 | 4730 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4731 | struct objfile *objfile) |
4732 | { | |
4733 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4734 | ||
fbd9ab74 JK |
4735 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4736 | { | |
4737 | /* It shares objfile->objfile_obstack. */ | |
4738 | subpst->dirname = pst->dirname; | |
4739 | } | |
4740 | ||
aaa75496 JB |
4741 | subpst->textlow = 0; |
4742 | subpst->texthigh = 0; | |
4743 | ||
8d749320 SM |
4744 | subpst->dependencies |
4745 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
4746 | subpst->dependencies[0] = pst; |
4747 | subpst->number_of_dependencies = 1; | |
4748 | ||
4749 | subpst->globals_offset = 0; | |
4750 | subpst->n_global_syms = 0; | |
4751 | subpst->statics_offset = 0; | |
4752 | subpst->n_static_syms = 0; | |
43f3e411 | 4753 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
4754 | subpst->read_symtab = pst->read_symtab; |
4755 | subpst->readin = 0; | |
4756 | ||
4757 | /* No private part is necessary for include psymtabs. This property | |
4758 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4759 | the regular ones. */ |
58a9656e | 4760 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4761 | } |
4762 | ||
4763 | /* Read the Line Number Program data and extract the list of files | |
4764 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4765 | partial symtab for each of these included files. */ |
aaa75496 JB |
4766 | |
4767 | static void | |
4768 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4769 | struct die_info *die, |
4770 | struct partial_symtab *pst) | |
aaa75496 | 4771 | { |
fff8551c | 4772 | line_header_up lh; |
d85a05f0 | 4773 | struct attribute *attr; |
aaa75496 | 4774 | |
d85a05f0 DJ |
4775 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4776 | if (attr) | |
9c541725 | 4777 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
4778 | if (lh == NULL) |
4779 | return; /* No linetable, so no includes. */ | |
4780 | ||
c6da4cef | 4781 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 4782 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
4783 | } |
4784 | ||
348e048f | 4785 | static hashval_t |
52dc124a | 4786 | hash_signatured_type (const void *item) |
348e048f | 4787 | { |
9a3c8263 SM |
4788 | const struct signatured_type *sig_type |
4789 | = (const struct signatured_type *) item; | |
9a619af0 | 4790 | |
348e048f | 4791 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4792 | return sig_type->signature; |
348e048f DE |
4793 | } |
4794 | ||
4795 | static int | |
52dc124a | 4796 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 4797 | { |
9a3c8263 SM |
4798 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
4799 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 4800 | |
348e048f DE |
4801 | return lhs->signature == rhs->signature; |
4802 | } | |
4803 | ||
1fd400ff TT |
4804 | /* Allocate a hash table for signatured types. */ |
4805 | ||
4806 | static htab_t | |
673bfd45 | 4807 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4808 | { |
4809 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4810 | hash_signatured_type, |
4811 | eq_signatured_type, | |
1fd400ff TT |
4812 | NULL, |
4813 | &objfile->objfile_obstack, | |
4814 | hashtab_obstack_allocate, | |
4815 | dummy_obstack_deallocate); | |
4816 | } | |
4817 | ||
d467dd73 | 4818 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4819 | |
4820 | static int | |
d467dd73 | 4821 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 4822 | { |
9a3c8263 SM |
4823 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
4824 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 4825 | |
b4dd5633 | 4826 | **datap = sigt; |
1fd400ff TT |
4827 | ++*datap; |
4828 | ||
4829 | return 1; | |
4830 | } | |
4831 | ||
78d4d2c5 | 4832 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
4833 | and fill them into TYPES_HTAB. It will process only type units, |
4834 | therefore DW_UT_type. */ | |
c88ee1f0 | 4835 | |
78d4d2c5 JK |
4836 | static void |
4837 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
4838 | dwarf2_section_info *section, htab_t &types_htab, |
4839 | rcuh_kind section_kind) | |
348e048f | 4840 | { |
3019eac3 | 4841 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 4842 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
4843 | bfd *abfd; |
4844 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 4845 | |
4bdcc0c1 DE |
4846 | abbrev_section = (dwo_file != NULL |
4847 | ? &dwo_file->sections.abbrev | |
4848 | : &dwarf2_per_objfile->abbrev); | |
4849 | ||
b4f54984 | 4850 | if (dwarf_read_debug) |
43988095 JK |
4851 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
4852 | get_section_name (section), | |
a32a8923 | 4853 | get_section_file_name (abbrev_section)); |
09406207 | 4854 | |
78d4d2c5 JK |
4855 | dwarf2_read_section (objfile, section); |
4856 | info_ptr = section->buffer; | |
348e048f | 4857 | |
78d4d2c5 JK |
4858 | if (info_ptr == NULL) |
4859 | return; | |
348e048f | 4860 | |
78d4d2c5 JK |
4861 | /* We can't set abfd until now because the section may be empty or |
4862 | not present, in which case the bfd is unknown. */ | |
4863 | abfd = get_section_bfd_owner (section); | |
348e048f | 4864 | |
78d4d2c5 JK |
4865 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4866 | because we don't need to read any dies: the signature is in the | |
4867 | header. */ | |
3019eac3 | 4868 | |
78d4d2c5 JK |
4869 | end_ptr = info_ptr + section->size; |
4870 | while (info_ptr < end_ptr) | |
4871 | { | |
78d4d2c5 JK |
4872 | struct signatured_type *sig_type; |
4873 | struct dwo_unit *dwo_tu; | |
4874 | void **slot; | |
4875 | const gdb_byte *ptr = info_ptr; | |
4876 | struct comp_unit_head header; | |
4877 | unsigned int length; | |
8b70b953 | 4878 | |
9c541725 | 4879 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 4880 | |
a49dd8dd JK |
4881 | /* Initialize it due to a false compiler warning. */ |
4882 | header.signature = -1; | |
9c541725 | 4883 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 4884 | |
78d4d2c5 JK |
4885 | /* We need to read the type's signature in order to build the hash |
4886 | table, but we don't need anything else just yet. */ | |
348e048f | 4887 | |
43988095 JK |
4888 | ptr = read_and_check_comp_unit_head (&header, section, |
4889 | abbrev_section, ptr, section_kind); | |
348e048f | 4890 | |
78d4d2c5 | 4891 | length = get_cu_length (&header); |
6caca83c | 4892 | |
78d4d2c5 JK |
4893 | /* Skip dummy type units. */ |
4894 | if (ptr >= info_ptr + length | |
43988095 JK |
4895 | || peek_abbrev_code (abfd, ptr) == 0 |
4896 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
4897 | { |
4898 | info_ptr += length; | |
4899 | continue; | |
4900 | } | |
dee91e82 | 4901 | |
78d4d2c5 JK |
4902 | if (types_htab == NULL) |
4903 | { | |
4904 | if (dwo_file) | |
4905 | types_htab = allocate_dwo_unit_table (objfile); | |
4906 | else | |
4907 | types_htab = allocate_signatured_type_table (objfile); | |
4908 | } | |
8b70b953 | 4909 | |
78d4d2c5 JK |
4910 | if (dwo_file) |
4911 | { | |
4912 | sig_type = NULL; | |
4913 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4914 | struct dwo_unit); | |
4915 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 4916 | dwo_tu->signature = header.signature; |
9c541725 | 4917 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 4918 | dwo_tu->section = section; |
9c541725 | 4919 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
4920 | dwo_tu->length = length; |
4921 | } | |
4922 | else | |
4923 | { | |
4924 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4925 | The real type_offset is in the DWO file. */ | |
4926 | dwo_tu = NULL; | |
4927 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4928 | struct signatured_type); | |
43988095 | 4929 | sig_type->signature = header.signature; |
9c541725 | 4930 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
4931 | sig_type->per_cu.objfile = objfile; |
4932 | sig_type->per_cu.is_debug_types = 1; | |
4933 | sig_type->per_cu.section = section; | |
9c541725 | 4934 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
4935 | sig_type->per_cu.length = length; |
4936 | } | |
4937 | ||
4938 | slot = htab_find_slot (types_htab, | |
4939 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4940 | INSERT); | |
4941 | gdb_assert (slot != NULL); | |
4942 | if (*slot != NULL) | |
4943 | { | |
9c541725 | 4944 | sect_offset dup_sect_off; |
0349ea22 | 4945 | |
3019eac3 DE |
4946 | if (dwo_file) |
4947 | { | |
78d4d2c5 JK |
4948 | const struct dwo_unit *dup_tu |
4949 | = (const struct dwo_unit *) *slot; | |
4950 | ||
9c541725 | 4951 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
4952 | } |
4953 | else | |
4954 | { | |
78d4d2c5 JK |
4955 | const struct signatured_type *dup_tu |
4956 | = (const struct signatured_type *) *slot; | |
4957 | ||
9c541725 | 4958 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 4959 | } |
8b70b953 | 4960 | |
78d4d2c5 JK |
4961 | complaint (&symfile_complaints, |
4962 | _("debug type entry at offset 0x%x is duplicate to" | |
4963 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 4964 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 4965 | hex_string (header.signature)); |
78d4d2c5 JK |
4966 | } |
4967 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 4968 | |
78d4d2c5 JK |
4969 | if (dwarf_read_debug > 1) |
4970 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 4971 | to_underlying (sect_off), |
43988095 | 4972 | hex_string (header.signature)); |
3019eac3 | 4973 | |
78d4d2c5 JK |
4974 | info_ptr += length; |
4975 | } | |
4976 | } | |
3019eac3 | 4977 | |
78d4d2c5 JK |
4978 | /* Create the hash table of all entries in the .debug_types |
4979 | (or .debug_types.dwo) section(s). | |
4980 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4981 | otherwise it is NULL. | |
b3c8eb43 | 4982 | |
78d4d2c5 | 4983 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 4984 | |
78d4d2c5 | 4985 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 4986 | |
78d4d2c5 JK |
4987 | static void |
4988 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4989 | VEC (dwarf2_section_info_def) *types, | |
4990 | htab_t &types_htab) | |
4991 | { | |
4992 | int ix; | |
4993 | struct dwarf2_section_info *section; | |
4994 | ||
4995 | if (VEC_empty (dwarf2_section_info_def, types)) | |
4996 | return; | |
348e048f | 4997 | |
78d4d2c5 JK |
4998 | for (ix = 0; |
4999 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5000 | ++ix) | |
43988095 JK |
5001 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5002 | rcuh_kind::TYPE); | |
3019eac3 DE |
5003 | } |
5004 | ||
5005 | /* Create the hash table of all entries in the .debug_types section, | |
5006 | and initialize all_type_units. | |
5007 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5008 | otherwise non-zero. */ | |
5009 | ||
5010 | static int | |
5011 | create_all_type_units (struct objfile *objfile) | |
5012 | { | |
78d4d2c5 | 5013 | htab_t types_htab = NULL; |
b4dd5633 | 5014 | struct signatured_type **iter; |
3019eac3 | 5015 | |
43988095 JK |
5016 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5017 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5018 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5019 | if (types_htab == NULL) |
5020 | { | |
5021 | dwarf2_per_objfile->signatured_types = NULL; | |
5022 | return 0; | |
5023 | } | |
5024 | ||
348e048f DE |
5025 | dwarf2_per_objfile->signatured_types = types_htab; |
5026 | ||
6aa5f3a6 DE |
5027 | dwarf2_per_objfile->n_type_units |
5028 | = dwarf2_per_objfile->n_allocated_type_units | |
5029 | = htab_elements (types_htab); | |
8d749320 SM |
5030 | dwarf2_per_objfile->all_type_units = |
5031 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5032 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5033 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5034 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5035 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5036 | |
348e048f DE |
5037 | return 1; |
5038 | } | |
5039 | ||
6aa5f3a6 DE |
5040 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5041 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5042 | Otherwise we find one. */ | |
5043 | ||
5044 | static struct signatured_type * | |
5045 | add_type_unit (ULONGEST sig, void **slot) | |
5046 | { | |
5047 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5048 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5049 | struct signatured_type *sig_type; | |
5050 | ||
5051 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5052 | ++n_type_units; | |
5053 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5054 | { | |
5055 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5056 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5057 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5058 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5059 | = XRESIZEVEC (struct signatured_type *, |
5060 | dwarf2_per_objfile->all_type_units, | |
5061 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5062 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5063 | } | |
5064 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5065 | ||
5066 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5067 | struct signatured_type); | |
5068 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5069 | sig_type->signature = sig; | |
5070 | sig_type->per_cu.is_debug_types = 1; | |
5071 | if (dwarf2_per_objfile->using_index) | |
5072 | { | |
5073 | sig_type->per_cu.v.quick = | |
5074 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5075 | struct dwarf2_per_cu_quick_data); | |
5076 | } | |
5077 | ||
5078 | if (slot == NULL) | |
5079 | { | |
5080 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5081 | sig_type, INSERT); | |
5082 | } | |
5083 | gdb_assert (*slot == NULL); | |
5084 | *slot = sig_type; | |
5085 | /* The rest of sig_type must be filled in by the caller. */ | |
5086 | return sig_type; | |
5087 | } | |
5088 | ||
a2ce51a0 DE |
5089 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5090 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5091 | ||
5092 | static void | |
5093 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5094 | struct signatured_type *sig_entry, | |
5095 | struct dwo_unit *dwo_entry) | |
5096 | { | |
7ee85ab1 | 5097 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5098 | gdb_assert (! sig_entry->per_cu.queued); |
5099 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5100 | if (dwarf2_per_objfile->using_index) |
5101 | { | |
5102 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5103 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5104 | } |
5105 | else | |
5106 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5107 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5108 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5109 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5110 | gdb_assert (sig_entry->dwo_unit == NULL); |
5111 | ||
5112 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5113 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5114 | sig_entry->per_cu.length = dwo_entry->length; |
5115 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5116 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5117 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5118 | sig_entry->dwo_unit = dwo_entry; | |
5119 | } | |
5120 | ||
5121 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5122 | If we haven't read the TU yet, create the signatured_type data structure |
5123 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5124 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5125 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5126 | containing that CU. Otherwise we could end up reading several other DWO | |
5127 | files (due to comdat folding) to process the transitive closure of all the | |
5128 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5129 | type signature that it needs. | |
a2ce51a0 DE |
5130 | We only do this for .gdb_index because in the psymtab case we already have |
5131 | to read all the DWOs to build the type unit groups. */ | |
5132 | ||
5133 | static struct signatured_type * | |
5134 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5135 | { | |
5136 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5137 | struct dwo_file *dwo_file; | |
5138 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5139 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5140 | void **slot; |
a2ce51a0 DE |
5141 | |
5142 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5143 | ||
6aa5f3a6 DE |
5144 | /* If TU skeletons have been removed then we may not have read in any |
5145 | TUs yet. */ | |
5146 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5147 | { | |
5148 | dwarf2_per_objfile->signatured_types | |
5149 | = allocate_signatured_type_table (objfile); | |
5150 | } | |
a2ce51a0 DE |
5151 | |
5152 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5153 | Use the global signatured_types array to do our own comdat-folding |
5154 | of types. If this is the first time we're reading this TU, and | |
5155 | the TU has an entry in .gdb_index, replace the recorded data from | |
5156 | .gdb_index with this TU. */ | |
a2ce51a0 | 5157 | |
a2ce51a0 | 5158 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
5159 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
5160 | &find_sig_entry, INSERT); | |
9a3c8263 | 5161 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5162 | |
5163 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5164 | read. Don't reassign the global entry to point to this DWO if that's |
5165 | the case. Also note that if the TU is already being read, it may not | |
5166 | have come from a DWO, the program may be a mix of Fission-compiled | |
5167 | code and non-Fission-compiled code. */ | |
5168 | ||
5169 | /* Have we already tried to read this TU? | |
5170 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5171 | needn't exist in the global table yet). */ | |
5172 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
5173 | return sig_entry; |
5174 | ||
6aa5f3a6 DE |
5175 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
5176 | dwo_unit of the TU itself. */ | |
5177 | dwo_file = cu->dwo_unit->dwo_file; | |
5178 | ||
a2ce51a0 DE |
5179 | /* Ok, this is the first time we're reading this TU. */ |
5180 | if (dwo_file->tus == NULL) | |
5181 | return NULL; | |
5182 | find_dwo_entry.signature = sig; | |
9a3c8263 | 5183 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
5184 | if (dwo_entry == NULL) |
5185 | return NULL; | |
5186 | ||
6aa5f3a6 DE |
5187 | /* If the global table doesn't have an entry for this TU, add one. */ |
5188 | if (sig_entry == NULL) | |
5189 | sig_entry = add_type_unit (sig, slot); | |
5190 | ||
a2ce51a0 | 5191 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 5192 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
5193 | return sig_entry; |
5194 | } | |
5195 | ||
a2ce51a0 DE |
5196 | /* Subroutine of lookup_signatured_type. |
5197 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
5198 | then try the DWP file. If the TU stub (skeleton) has been removed then |
5199 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
5200 | |
5201 | static struct signatured_type * | |
5202 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5203 | { | |
5204 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5205 | struct dwp_file *dwp_file = get_dwp_file (); | |
5206 | struct dwo_unit *dwo_entry; | |
5207 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5208 | void **slot; |
a2ce51a0 DE |
5209 | |
5210 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5211 | gdb_assert (dwp_file != NULL); | |
5212 | ||
6aa5f3a6 DE |
5213 | /* If TU skeletons have been removed then we may not have read in any |
5214 | TUs yet. */ | |
5215 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 5216 | { |
6aa5f3a6 DE |
5217 | dwarf2_per_objfile->signatured_types |
5218 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
5219 | } |
5220 | ||
6aa5f3a6 DE |
5221 | find_sig_entry.signature = sig; |
5222 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5223 | &find_sig_entry, INSERT); | |
9a3c8263 | 5224 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
5225 | |
5226 | /* Have we already tried to read this TU? | |
5227 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5228 | needn't exist in the global table yet). */ | |
5229 | if (sig_entry != NULL) | |
5230 | return sig_entry; | |
5231 | ||
a2ce51a0 DE |
5232 | if (dwp_file->tus == NULL) |
5233 | return NULL; | |
57d63ce2 DE |
5234 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
5235 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
5236 | if (dwo_entry == NULL) |
5237 | return NULL; | |
5238 | ||
6aa5f3a6 | 5239 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
5240 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
5241 | ||
a2ce51a0 DE |
5242 | return sig_entry; |
5243 | } | |
5244 | ||
380bca97 | 5245 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5246 | Returns NULL if signature SIG is not present in the table. |
5247 | It is up to the caller to complain about this. */ | |
348e048f DE |
5248 | |
5249 | static struct signatured_type * | |
a2ce51a0 | 5250 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5251 | { |
a2ce51a0 DE |
5252 | if (cu->dwo_unit |
5253 | && dwarf2_per_objfile->using_index) | |
5254 | { | |
5255 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5256 | These cases require special processing. */ | |
5257 | if (get_dwp_file () == NULL) | |
5258 | return lookup_dwo_signatured_type (cu, sig); | |
5259 | else | |
5260 | return lookup_dwp_signatured_type (cu, sig); | |
5261 | } | |
5262 | else | |
5263 | { | |
5264 | struct signatured_type find_entry, *entry; | |
348e048f | 5265 | |
a2ce51a0 DE |
5266 | if (dwarf2_per_objfile->signatured_types == NULL) |
5267 | return NULL; | |
5268 | find_entry.signature = sig; | |
9a3c8263 SM |
5269 | entry = ((struct signatured_type *) |
5270 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5271 | return entry; |
5272 | } | |
348e048f | 5273 | } |
42e7ad6c DE |
5274 | \f |
5275 | /* Low level DIE reading support. */ | |
348e048f | 5276 | |
d85a05f0 DJ |
5277 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5278 | ||
5279 | static void | |
5280 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5281 | struct dwarf2_cu *cu, |
3019eac3 DE |
5282 | struct dwarf2_section_info *section, |
5283 | struct dwo_file *dwo_file) | |
d85a05f0 | 5284 | { |
fceca515 | 5285 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5286 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5287 | reader->cu = cu; |
3019eac3 | 5288 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5289 | reader->die_section = section; |
5290 | reader->buffer = section->buffer; | |
f664829e | 5291 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5292 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5293 | } |
5294 | ||
b0c7bfa9 DE |
5295 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5296 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5297 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5298 | already. | |
5299 | ||
5300 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5301 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5302 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5303 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5304 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5305 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5306 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5307 | are filled in with the info of the DIE from the DWO file. | |
5308 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5309 | provided an abbrev table to use. | |
5310 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5311 | ||
5312 | static int | |
5313 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5314 | struct dwo_unit *dwo_unit, | |
5315 | int abbrev_table_provided, | |
5316 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5317 | const char *stub_comp_dir, |
b0c7bfa9 | 5318 | struct die_reader_specs *result_reader, |
d521ce57 | 5319 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5320 | struct die_info **result_comp_unit_die, |
5321 | int *result_has_children) | |
5322 | { | |
5323 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5324 | struct dwarf2_cu *cu = this_cu->cu; | |
5325 | struct dwarf2_section_info *section; | |
5326 | bfd *abfd; | |
d521ce57 | 5327 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5328 | ULONGEST signature; /* Or dwo_id. */ |
5329 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5330 | int i,num_extra_attrs; | |
5331 | struct dwarf2_section_info *dwo_abbrev_section; | |
5332 | struct attribute *attr; | |
5333 | struct die_info *comp_unit_die; | |
5334 | ||
b0aeadb3 DE |
5335 | /* At most one of these may be provided. */ |
5336 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5337 | |
b0c7bfa9 DE |
5338 | /* These attributes aren't processed until later: |
5339 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5340 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5341 | referenced later. However, these attributes are found in the stub | |
5342 | which we won't have later. In order to not impose this complication | |
5343 | on the rest of the code, we read them here and copy them to the | |
5344 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5345 | |
5346 | stmt_list = NULL; | |
5347 | low_pc = NULL; | |
5348 | high_pc = NULL; | |
5349 | ranges = NULL; | |
5350 | comp_dir = NULL; | |
5351 | ||
5352 | if (stub_comp_unit_die != NULL) | |
5353 | { | |
5354 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5355 | DWO file. */ | |
5356 | if (! this_cu->is_debug_types) | |
5357 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5358 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5359 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5360 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5361 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5362 | ||
5363 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5364 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5365 | cu->addr_base = 0; | |
5366 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5367 | if (attr) | |
5368 | cu->addr_base = DW_UNSND (attr); | |
5369 | ||
5370 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5371 | We need the value before we can process DW_AT_ranges. */ | |
5372 | cu->ranges_base = 0; | |
5373 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5374 | if (attr) | |
5375 | cu->ranges_base = DW_UNSND (attr); | |
5376 | } | |
a2ce51a0 DE |
5377 | else if (stub_comp_dir != NULL) |
5378 | { | |
5379 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5380 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5381 | comp_dir->name = DW_AT_comp_dir; |
5382 | comp_dir->form = DW_FORM_string; | |
5383 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5384 | DW_STRING (comp_dir) = stub_comp_dir; | |
5385 | } | |
b0c7bfa9 DE |
5386 | |
5387 | /* Set up for reading the DWO CU/TU. */ | |
5388 | cu->dwo_unit = dwo_unit; | |
5389 | section = dwo_unit->section; | |
5390 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5391 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
5392 | begin_info_ptr = info_ptr = (section->buffer |
5393 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
5394 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
5395 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5396 | ||
5397 | if (this_cu->is_debug_types) | |
5398 | { | |
b0c7bfa9 DE |
5399 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
5400 | ||
43988095 | 5401 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 5402 | dwo_abbrev_section, |
43988095 | 5403 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 5404 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 5405 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
5406 | { |
5407 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5408 | " TU at offset 0x%x [in module %s]"), | |
5409 | hex_string (sig_type->signature), | |
43988095 | 5410 | hex_string (cu->header.signature), |
9c541725 | 5411 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
5412 | bfd_get_filename (abfd)); |
5413 | } | |
9c541725 | 5414 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
5415 | /* For DWOs coming from DWP files, we don't know the CU length |
5416 | nor the type's offset in the TU until now. */ | |
5417 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 5418 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
5419 | |
5420 | /* Establish the type offset that can be used to lookup the type. | |
5421 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
5422 | sig_type->type_offset_in_section |
5423 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
5424 | } |
5425 | else | |
5426 | { | |
5427 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5428 | dwo_abbrev_section, | |
43988095 | 5429 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 5430 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
5431 | /* For DWOs coming from DWP files, we don't know the CU length |
5432 | until now. */ | |
5433 | dwo_unit->length = get_cu_length (&cu->header); | |
5434 | } | |
5435 | ||
02142a6c DE |
5436 | /* Replace the CU's original abbrev table with the DWO's. |
5437 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5438 | if (abbrev_table_provided) |
5439 | { | |
5440 | /* Don't free the provided abbrev table, the caller of | |
5441 | init_cutu_and_read_dies owns it. */ | |
5442 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5443 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5444 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5445 | } | |
5446 | else | |
5447 | { | |
5448 | dwarf2_free_abbrev_table (cu); | |
5449 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5450 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5451 | } |
5452 | ||
5453 | /* Read in the die, but leave space to copy over the attributes | |
5454 | from the stub. This has the benefit of simplifying the rest of | |
5455 | the code - all the work to maintain the illusion of a single | |
5456 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5457 | num_extra_attrs = ((stmt_list != NULL) | |
5458 | + (low_pc != NULL) | |
5459 | + (high_pc != NULL) | |
5460 | + (ranges != NULL) | |
5461 | + (comp_dir != NULL)); | |
5462 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5463 | result_has_children, num_extra_attrs); | |
5464 | ||
5465 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5466 | comp_unit_die = *result_comp_unit_die; | |
5467 | i = comp_unit_die->num_attrs; | |
5468 | if (stmt_list != NULL) | |
5469 | comp_unit_die->attrs[i++] = *stmt_list; | |
5470 | if (low_pc != NULL) | |
5471 | comp_unit_die->attrs[i++] = *low_pc; | |
5472 | if (high_pc != NULL) | |
5473 | comp_unit_die->attrs[i++] = *high_pc; | |
5474 | if (ranges != NULL) | |
5475 | comp_unit_die->attrs[i++] = *ranges; | |
5476 | if (comp_dir != NULL) | |
5477 | comp_unit_die->attrs[i++] = *comp_dir; | |
5478 | comp_unit_die->num_attrs += num_extra_attrs; | |
5479 | ||
b4f54984 | 5480 | if (dwarf_die_debug) |
bf6af496 DE |
5481 | { |
5482 | fprintf_unfiltered (gdb_stdlog, | |
5483 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5484 | get_section_name (section), |
bf6af496 DE |
5485 | (unsigned) (begin_info_ptr - section->buffer), |
5486 | bfd_get_filename (abfd)); | |
b4f54984 | 5487 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
5488 | } |
5489 | ||
a2ce51a0 DE |
5490 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5491 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5492 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5493 | to get it via circuitous means. Blech. */ | |
5494 | if (comp_dir != NULL) | |
5495 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5496 | ||
b0c7bfa9 DE |
5497 | /* Skip dummy compilation units. */ |
5498 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5499 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5500 | return 0; | |
5501 | ||
5502 | *result_info_ptr = info_ptr; | |
5503 | return 1; | |
5504 | } | |
5505 | ||
5506 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5507 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5508 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5509 | |
5510 | static struct dwo_unit * | |
5511 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5512 | struct die_info *comp_unit_die) | |
5513 | { | |
5514 | struct dwarf2_cu *cu = this_cu->cu; | |
5515 | struct attribute *attr; | |
5516 | ULONGEST signature; | |
5517 | struct dwo_unit *dwo_unit; | |
5518 | const char *comp_dir, *dwo_name; | |
5519 | ||
a2ce51a0 DE |
5520 | gdb_assert (cu != NULL); |
5521 | ||
b0c7bfa9 | 5522 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
5523 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5524 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
5525 | |
5526 | if (this_cu->is_debug_types) | |
5527 | { | |
5528 | struct signatured_type *sig_type; | |
5529 | ||
5530 | /* Since this_cu is the first member of struct signatured_type, | |
5531 | we can go from a pointer to one to a pointer to the other. */ | |
5532 | sig_type = (struct signatured_type *) this_cu; | |
5533 | signature = sig_type->signature; | |
5534 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5535 | } | |
5536 | else | |
5537 | { | |
5538 | struct attribute *attr; | |
5539 | ||
5540 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5541 | if (! attr) | |
5542 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5543 | " [in module %s]"), | |
4262abfb | 5544 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5545 | signature = DW_UNSND (attr); |
5546 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5547 | signature); | |
5548 | } | |
5549 | ||
b0c7bfa9 DE |
5550 | return dwo_unit; |
5551 | } | |
5552 | ||
a2ce51a0 | 5553 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
5554 | See it for a description of the parameters. |
5555 | Read a TU directly from a DWO file, bypassing the stub. | |
5556 | ||
5557 | Note: This function could be a little bit simpler if we shared cleanups | |
5558 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
5559 | to do, so we keep this function self-contained. Or we could move this | |
5560 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
5561 | |
5562 | static void | |
6aa5f3a6 DE |
5563 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
5564 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
5565 | die_reader_func_ftype *die_reader_func, |
5566 | void *data) | |
5567 | { | |
5568 | struct dwarf2_cu *cu; | |
5569 | struct signatured_type *sig_type; | |
6aa5f3a6 | 5570 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
5571 | struct die_reader_specs reader; |
5572 | const gdb_byte *info_ptr; | |
5573 | struct die_info *comp_unit_die; | |
5574 | int has_children; | |
5575 | ||
5576 | /* Verify we can do the following downcast, and that we have the | |
5577 | data we need. */ | |
5578 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5579 | sig_type = (struct signatured_type *) this_cu; | |
5580 | gdb_assert (sig_type->dwo_unit != NULL); | |
5581 | ||
5582 | cleanups = make_cleanup (null_cleanup, NULL); | |
5583 | ||
6aa5f3a6 DE |
5584 | if (use_existing_cu && this_cu->cu != NULL) |
5585 | { | |
5586 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
5587 | cu = this_cu->cu; | |
5588 | /* There's no need to do the rereading_dwo_cu handling that | |
5589 | init_cutu_and_read_dies does since we don't read the stub. */ | |
5590 | } | |
5591 | else | |
5592 | { | |
5593 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5594 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5595 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
5596 | init_one_comp_unit (cu, this_cu); |
5597 | /* If an error occurs while loading, release our storage. */ | |
5598 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5599 | } | |
5600 | ||
5601 | /* A future optimization, if needed, would be to use an existing | |
5602 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
5603 | could share abbrev tables. */ | |
a2ce51a0 DE |
5604 | |
5605 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5606 | 0 /* abbrev_table_provided */, | |
5607 | NULL /* stub_comp_unit_die */, | |
5608 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5609 | &reader, &info_ptr, | |
5610 | &comp_unit_die, &has_children) == 0) | |
5611 | { | |
5612 | /* Dummy die. */ | |
5613 | do_cleanups (cleanups); | |
5614 | return; | |
5615 | } | |
5616 | ||
5617 | /* All the "real" work is done here. */ | |
5618 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5619 | ||
6aa5f3a6 | 5620 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
5621 | but the alternative is making the latter more complex. |
5622 | This function is only for the special case of using DWO files directly: | |
5623 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 5624 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 5625 | { |
6aa5f3a6 DE |
5626 | if (keep) |
5627 | { | |
5628 | /* We've successfully allocated this compilation unit. Let our | |
5629 | caller clean it up when finished with it. */ | |
5630 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5631 | |
6aa5f3a6 DE |
5632 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5633 | So we have to manually free the abbrev table. */ | |
5634 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 5635 | |
6aa5f3a6 DE |
5636 | /* Link this CU into read_in_chain. */ |
5637 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5638 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5639 | } | |
5640 | else | |
5641 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5642 | } |
a2ce51a0 DE |
5643 | |
5644 | do_cleanups (cleanups); | |
5645 | } | |
5646 | ||
fd820528 | 5647 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5648 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5649 | |
f4dc4d17 DE |
5650 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5651 | Otherwise the table specified in the comp unit header is read in and used. | |
5652 | This is an optimization for when we already have the abbrev table. | |
5653 | ||
dee91e82 DE |
5654 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5655 | Otherwise, a new CU is allocated with xmalloc. | |
5656 | ||
5657 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5658 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5659 | ||
5660 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5661 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5662 | |
70221824 | 5663 | static void |
fd820528 | 5664 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5665 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5666 | int use_existing_cu, int keep, |
5667 | die_reader_func_ftype *die_reader_func, | |
5668 | void *data) | |
c906108c | 5669 | { |
dee91e82 | 5670 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5671 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5672 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5673 | struct dwarf2_cu *cu; |
d521ce57 | 5674 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5675 | struct die_reader_specs reader; |
d85a05f0 | 5676 | struct die_info *comp_unit_die; |
dee91e82 | 5677 | int has_children; |
d85a05f0 | 5678 | struct attribute *attr; |
365156ad | 5679 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5680 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5681 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5682 | /* Non-zero if CU currently points to a DWO file and we need to |
5683 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5684 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5685 | int rereading_dwo_cu = 0; |
c906108c | 5686 | |
b4f54984 | 5687 | if (dwarf_die_debug) |
09406207 DE |
5688 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5689 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 5690 | to_underlying (this_cu->sect_off)); |
09406207 | 5691 | |
dee91e82 DE |
5692 | if (use_existing_cu) |
5693 | gdb_assert (keep); | |
23745b47 | 5694 | |
a2ce51a0 DE |
5695 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5696 | file (instead of going through the stub), short-circuit all of this. */ | |
5697 | if (this_cu->reading_dwo_directly) | |
5698 | { | |
5699 | /* Narrow down the scope of possibilities to have to understand. */ | |
5700 | gdb_assert (this_cu->is_debug_types); | |
5701 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
5702 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
5703 | die_reader_func, data); | |
a2ce51a0 DE |
5704 | return; |
5705 | } | |
5706 | ||
dee91e82 DE |
5707 | cleanups = make_cleanup (null_cleanup, NULL); |
5708 | ||
5709 | /* This is cheap if the section is already read in. */ | |
5710 | dwarf2_read_section (objfile, section); | |
5711 | ||
9c541725 | 5712 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
5713 | |
5714 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5715 | |
5716 | if (use_existing_cu && this_cu->cu != NULL) | |
5717 | { | |
5718 | cu = this_cu->cu; | |
42e7ad6c DE |
5719 | /* If this CU is from a DWO file we need to start over, we need to |
5720 | refetch the attributes from the skeleton CU. | |
5721 | This could be optimized by retrieving those attributes from when we | |
5722 | were here the first time: the previous comp_unit_die was stored in | |
5723 | comp_unit_obstack. But there's no data yet that we need this | |
5724 | optimization. */ | |
5725 | if (cu->dwo_unit != NULL) | |
5726 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5727 | } |
5728 | else | |
5729 | { | |
5730 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5731 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5732 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 5733 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 5734 | /* If an error occurs while loading, release our storage. */ |
365156ad | 5735 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5736 | } |
dee91e82 | 5737 | |
b0c7bfa9 | 5738 | /* Get the header. */ |
9c541725 | 5739 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
5740 | { |
5741 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 5742 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
5743 | } |
5744 | else | |
5745 | { | |
3019eac3 | 5746 | if (this_cu->is_debug_types) |
dee91e82 | 5747 | { |
43988095 | 5748 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 5749 | abbrev_section, info_ptr, |
43988095 | 5750 | rcuh_kind::TYPE); |
dee91e82 | 5751 | |
42e7ad6c DE |
5752 | /* Since per_cu is the first member of struct signatured_type, |
5753 | we can go from a pointer to one to a pointer to the other. */ | |
5754 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 5755 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
5756 | gdb_assert (sig_type->type_offset_in_tu |
5757 | == cu->header.type_cu_offset_in_tu); | |
5758 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 5759 | |
42e7ad6c DE |
5760 | /* LENGTH has not been set yet for type units if we're |
5761 | using .gdb_index. */ | |
1ce1cefd | 5762 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5763 | |
5764 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
5765 | sig_type->type_offset_in_section = |
5766 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
5767 | |
5768 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
5769 | } |
5770 | else | |
5771 | { | |
4bdcc0c1 DE |
5772 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5773 | abbrev_section, | |
43988095 JK |
5774 | info_ptr, |
5775 | rcuh_kind::COMPILE); | |
dee91e82 | 5776 | |
9c541725 | 5777 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 5778 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 5779 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
5780 | } |
5781 | } | |
10b3939b | 5782 | |
6caca83c | 5783 | /* Skip dummy compilation units. */ |
dee91e82 | 5784 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5785 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5786 | { | |
dee91e82 | 5787 | do_cleanups (cleanups); |
21b2bd31 | 5788 | return; |
6caca83c CC |
5789 | } |
5790 | ||
433df2d4 DE |
5791 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5792 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5793 | done. Note that it's important that if the CU had an abbrev table |
5794 | on entry we don't free it when we're done: Somewhere up the call stack | |
5795 | it may be in use. */ | |
f4dc4d17 DE |
5796 | if (abbrev_table != NULL) |
5797 | { | |
5798 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 5799 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
5800 | cu->abbrev_table = abbrev_table; |
5801 | } | |
5802 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5803 | { |
4bdcc0c1 | 5804 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5805 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5806 | } | |
42e7ad6c DE |
5807 | else if (rereading_dwo_cu) |
5808 | { | |
5809 | dwarf2_free_abbrev_table (cu); | |
5810 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5811 | } | |
af703f96 | 5812 | |
dee91e82 | 5813 | /* Read the top level CU/TU die. */ |
3019eac3 | 5814 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5815 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5816 | |
b0c7bfa9 DE |
5817 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5818 | from the DWO file. | |
5819 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5820 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5821 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5822 | if (attr) | |
5823 | { | |
3019eac3 | 5824 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5825 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5826 | |
5827 | if (has_children) | |
6a506a2d DE |
5828 | { |
5829 | complaint (&symfile_complaints, | |
5830 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5831 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 5832 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 5833 | } |
b0c7bfa9 | 5834 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5835 | if (dwo_unit != NULL) |
3019eac3 | 5836 | { |
6a506a2d DE |
5837 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5838 | abbrev_table != NULL, | |
a2ce51a0 | 5839 | comp_unit_die, NULL, |
6a506a2d DE |
5840 | &reader, &info_ptr, |
5841 | &dwo_comp_unit_die, &has_children) == 0) | |
5842 | { | |
5843 | /* Dummy die. */ | |
5844 | do_cleanups (cleanups); | |
5845 | return; | |
5846 | } | |
5847 | comp_unit_die = dwo_comp_unit_die; | |
5848 | } | |
5849 | else | |
5850 | { | |
5851 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5852 | the stub. A complaint has already been logged. There's | |
5853 | not much more we can do except pass on the stub DIE to | |
5854 | die_reader_func. We don't want to throw an error on bad | |
5855 | debug info. */ | |
3019eac3 DE |
5856 | } |
5857 | } | |
5858 | ||
b0c7bfa9 | 5859 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5860 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5861 | ||
b0c7bfa9 | 5862 | /* Done, clean up. */ |
365156ad | 5863 | if (free_cu_cleanup != NULL) |
348e048f | 5864 | { |
365156ad TT |
5865 | if (keep) |
5866 | { | |
5867 | /* We've successfully allocated this compilation unit. Let our | |
5868 | caller clean it up when finished with it. */ | |
5869 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5870 | |
365156ad TT |
5871 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5872 | So we have to manually free the abbrev table. */ | |
5873 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5874 | |
365156ad TT |
5875 | /* Link this CU into read_in_chain. */ |
5876 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5877 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5878 | } | |
5879 | else | |
5880 | do_cleanups (free_cu_cleanup); | |
348e048f | 5881 | } |
365156ad TT |
5882 | |
5883 | do_cleanups (cleanups); | |
dee91e82 DE |
5884 | } |
5885 | ||
33e80786 DE |
5886 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5887 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5888 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5889 | |
5890 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5891 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5892 | |
5893 | We fill in THIS_CU->length. | |
5894 | ||
5895 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5896 | linker) then DIE_READER_FUNC will not get called. | |
5897 | ||
5898 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5899 | This is done in order to not leave THIS_CU->cu in a state where we have |
5900 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5901 | |
5902 | static void | |
5903 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5904 | struct dwo_file *dwo_file, |
dee91e82 DE |
5905 | die_reader_func_ftype *die_reader_func, |
5906 | void *data) | |
5907 | { | |
5908 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5909 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5910 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5911 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5912 | struct dwarf2_cu cu; |
d521ce57 | 5913 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5914 | struct die_reader_specs reader; |
5915 | struct cleanup *cleanups; | |
5916 | struct die_info *comp_unit_die; | |
5917 | int has_children; | |
5918 | ||
b4f54984 | 5919 | if (dwarf_die_debug) |
09406207 DE |
5920 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5921 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 5922 | to_underlying (this_cu->sect_off)); |
09406207 | 5923 | |
dee91e82 DE |
5924 | gdb_assert (this_cu->cu == NULL); |
5925 | ||
33e80786 DE |
5926 | abbrev_section = (dwo_file != NULL |
5927 | ? &dwo_file->sections.abbrev | |
5928 | : get_abbrev_section_for_cu (this_cu)); | |
5929 | ||
dee91e82 DE |
5930 | /* This is cheap if the section is already read in. */ |
5931 | dwarf2_read_section (objfile, section); | |
5932 | ||
5933 | init_one_comp_unit (&cu, this_cu); | |
5934 | ||
5935 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5936 | ||
9c541725 | 5937 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
5938 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5939 | abbrev_section, info_ptr, | |
43988095 JK |
5940 | (this_cu->is_debug_types |
5941 | ? rcuh_kind::TYPE | |
5942 | : rcuh_kind::COMPILE)); | |
dee91e82 | 5943 | |
1ce1cefd | 5944 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5945 | |
5946 | /* Skip dummy compilation units. */ | |
5947 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5948 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5949 | { |
dee91e82 | 5950 | do_cleanups (cleanups); |
21b2bd31 | 5951 | return; |
93311388 | 5952 | } |
72bf9492 | 5953 | |
dee91e82 DE |
5954 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5955 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5956 | ||
3019eac3 | 5957 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5958 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5959 | ||
5960 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5961 | ||
5962 | do_cleanups (cleanups); | |
5963 | } | |
5964 | ||
3019eac3 DE |
5965 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5966 | does not lookup the specified DWO file. | |
5967 | This cannot be used to read DWO files. | |
dee91e82 DE |
5968 | |
5969 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5970 | This is done in order to not leave THIS_CU->cu in a state where we have |
5971 | to care whether it refers to the "main" CU or the DWO CU. | |
5972 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5973 | |
5974 | static void | |
5975 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5976 | die_reader_func_ftype *die_reader_func, | |
5977 | void *data) | |
5978 | { | |
33e80786 | 5979 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5980 | } |
0018ea6f DE |
5981 | \f |
5982 | /* Type Unit Groups. | |
dee91e82 | 5983 | |
0018ea6f DE |
5984 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5985 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5986 | so that all types coming from the same compilation (.o file) are grouped | |
5987 | together. A future step could be to put the types in the same symtab as | |
5988 | the CU the types ultimately came from. */ | |
ff013f42 | 5989 | |
f4dc4d17 DE |
5990 | static hashval_t |
5991 | hash_type_unit_group (const void *item) | |
5992 | { | |
9a3c8263 SM |
5993 | const struct type_unit_group *tu_group |
5994 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 5995 | |
094b34ac | 5996 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5997 | } |
348e048f DE |
5998 | |
5999 | static int | |
f4dc4d17 | 6000 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6001 | { |
9a3c8263 SM |
6002 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6003 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6004 | |
094b34ac | 6005 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6006 | } |
348e048f | 6007 | |
f4dc4d17 DE |
6008 | /* Allocate a hash table for type unit groups. */ |
6009 | ||
6010 | static htab_t | |
6011 | allocate_type_unit_groups_table (void) | |
6012 | { | |
6013 | return htab_create_alloc_ex (3, | |
6014 | hash_type_unit_group, | |
6015 | eq_type_unit_group, | |
6016 | NULL, | |
6017 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6018 | hashtab_obstack_allocate, | |
6019 | dummy_obstack_deallocate); | |
6020 | } | |
dee91e82 | 6021 | |
f4dc4d17 DE |
6022 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6023 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6024 | of any one psymtab grow too big. */ | |
6025 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6026 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6027 | |
094b34ac | 6028 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6029 | Create the type_unit_group object used to hold one or more TUs. */ |
6030 | ||
6031 | static struct type_unit_group * | |
094b34ac | 6032 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6033 | { |
6034 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6035 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6036 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6037 | |
6038 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6039 | struct type_unit_group); | |
094b34ac | 6040 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6041 | per_cu->objfile = objfile; |
f4dc4d17 | 6042 | |
094b34ac DE |
6043 | if (dwarf2_per_objfile->using_index) |
6044 | { | |
6045 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6046 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6047 | } |
6048 | else | |
6049 | { | |
9c541725 | 6050 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6051 | struct partial_symtab *pst; |
6052 | char *name; | |
6053 | ||
6054 | /* Give the symtab a useful name for debug purposes. */ | |
6055 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6056 | name = xstrprintf ("<type_units_%d>", | |
6057 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6058 | else | |
6059 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6060 | ||
6061 | pst = create_partial_symtab (per_cu, name); | |
6062 | pst->anonymous = 1; | |
f4dc4d17 | 6063 | |
094b34ac DE |
6064 | xfree (name); |
6065 | } | |
f4dc4d17 | 6066 | |
094b34ac | 6067 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6068 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6069 | |
6070 | return tu_group; | |
6071 | } | |
6072 | ||
094b34ac DE |
6073 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6074 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6075 | |
6076 | static struct type_unit_group * | |
ff39bb5e | 6077 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6078 | { |
6079 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6080 | struct type_unit_group *tu_group; | |
6081 | void **slot; | |
6082 | unsigned int line_offset; | |
6083 | struct type_unit_group type_unit_group_for_lookup; | |
6084 | ||
6085 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6086 | { | |
6087 | dwarf2_per_objfile->type_unit_groups = | |
6088 | allocate_type_unit_groups_table (); | |
6089 | } | |
6090 | ||
6091 | /* Do we need to create a new group, or can we use an existing one? */ | |
6092 | ||
6093 | if (stmt_list) | |
6094 | { | |
6095 | line_offset = DW_UNSND (stmt_list); | |
6096 | ++tu_stats->nr_symtab_sharers; | |
6097 | } | |
6098 | else | |
6099 | { | |
6100 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6101 | We can do various things here like create one group per TU or | |
6102 | spread them over multiple groups to split up the expansion work. | |
6103 | To avoid worst case scenarios (too many groups or too large groups) | |
6104 | we, umm, group them in bunches. */ | |
6105 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6106 | | (tu_stats->nr_stmt_less_type_units | |
6107 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6108 | ++tu_stats->nr_stmt_less_type_units; | |
6109 | } | |
6110 | ||
094b34ac | 6111 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6112 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6113 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6114 | &type_unit_group_for_lookup, INSERT); | |
6115 | if (*slot != NULL) | |
6116 | { | |
9a3c8263 | 6117 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6118 | gdb_assert (tu_group != NULL); |
6119 | } | |
6120 | else | |
6121 | { | |
9c541725 | 6122 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6123 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6124 | *slot = tu_group; |
6125 | ++tu_stats->nr_symtabs; | |
6126 | } | |
6127 | ||
6128 | return tu_group; | |
6129 | } | |
0018ea6f DE |
6130 | \f |
6131 | /* Partial symbol tables. */ | |
6132 | ||
6133 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6134 | ||
6135 | The caller must fill in the following details: | |
6136 | dirname, textlow, texthigh. */ | |
6137 | ||
6138 | static struct partial_symtab * | |
6139 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
6140 | { | |
6141 | struct objfile *objfile = per_cu->objfile; | |
6142 | struct partial_symtab *pst; | |
6143 | ||
18a94d75 | 6144 | pst = start_psymtab_common (objfile, name, 0, |
af5bf4ad SM |
6145 | objfile->global_psymbols, |
6146 | objfile->static_psymbols); | |
0018ea6f DE |
6147 | |
6148 | pst->psymtabs_addrmap_supported = 1; | |
6149 | ||
6150 | /* This is the glue that links PST into GDB's symbol API. */ | |
6151 | pst->read_symtab_private = per_cu; | |
6152 | pst->read_symtab = dwarf2_read_symtab; | |
6153 | per_cu->v.psymtab = pst; | |
6154 | ||
6155 | return pst; | |
6156 | } | |
6157 | ||
b93601f3 TT |
6158 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
6159 | type. */ | |
6160 | ||
6161 | struct process_psymtab_comp_unit_data | |
6162 | { | |
6163 | /* True if we are reading a DW_TAG_partial_unit. */ | |
6164 | ||
6165 | int want_partial_unit; | |
6166 | ||
6167 | /* The "pretend" language that is used if the CU doesn't declare a | |
6168 | language. */ | |
6169 | ||
6170 | enum language pretend_language; | |
6171 | }; | |
6172 | ||
0018ea6f DE |
6173 | /* die_reader_func for process_psymtab_comp_unit. */ |
6174 | ||
6175 | static void | |
6176 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6177 | const gdb_byte *info_ptr, |
0018ea6f DE |
6178 | struct die_info *comp_unit_die, |
6179 | int has_children, | |
6180 | void *data) | |
6181 | { | |
6182 | struct dwarf2_cu *cu = reader->cu; | |
6183 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 6184 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 6185 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
6186 | CORE_ADDR baseaddr; |
6187 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
6188 | struct partial_symtab *pst; | |
3a2b436a | 6189 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 6190 | const char *filename; |
9a3c8263 SM |
6191 | struct process_psymtab_comp_unit_data *info |
6192 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 6193 | |
b93601f3 | 6194 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
6195 | return; |
6196 | ||
6197 | gdb_assert (! per_cu->is_debug_types); | |
6198 | ||
b93601f3 | 6199 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
6200 | |
6201 | cu->list_in_scope = &file_symbols; | |
6202 | ||
6203 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
6204 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
6205 | if (filename == NULL) | |
0018ea6f | 6206 | filename = ""; |
0018ea6f DE |
6207 | |
6208 | pst = create_partial_symtab (per_cu, filename); | |
6209 | ||
6210 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 6211 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
6212 | |
6213 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6214 | ||
6215 | dwarf2_find_base_address (comp_unit_die, cu); | |
6216 | ||
6217 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6218 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6219 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6220 | &best_highpc, cu, pst); | |
6221 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
6222 | /* Store the contiguous range if it is not empty; it can be empty for |
6223 | CUs with no code. */ | |
6224 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
6225 | gdbarch_adjust_dwarf2_addr (gdbarch, |
6226 | best_lowpc + baseaddr), | |
6227 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
6228 | best_highpc + baseaddr) - 1, | |
6229 | pst); | |
0018ea6f DE |
6230 | |
6231 | /* Check if comp unit has_children. | |
6232 | If so, read the rest of the partial symbols from this comp unit. | |
6233 | If not, there's no more debug_info for this comp unit. */ | |
6234 | if (has_children) | |
6235 | { | |
6236 | struct partial_die_info *first_die; | |
6237 | CORE_ADDR lowpc, highpc; | |
6238 | ||
6239 | lowpc = ((CORE_ADDR) -1); | |
6240 | highpc = ((CORE_ADDR) 0); | |
6241 | ||
6242 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6243 | ||
6244 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6245 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6246 | |
6247 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6248 | complaints from `maint check'. */ | |
6249 | if (lowpc == ((CORE_ADDR) -1)) | |
6250 | lowpc = highpc; | |
6251 | ||
6252 | /* If the compilation unit didn't have an explicit address range, | |
6253 | then use the information extracted from its child dies. */ | |
e385593e | 6254 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6255 | { |
6256 | best_lowpc = lowpc; | |
6257 | best_highpc = highpc; | |
6258 | } | |
6259 | } | |
3e29f34a MR |
6260 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6261 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6262 | |
8763cede | 6263 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6264 | |
6265 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6266 | { | |
6267 | int i; | |
6268 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6269 | struct dwarf2_per_cu_data *iter; | |
6270 | ||
6271 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6272 | post-pass. */ | |
6273 | pst->number_of_dependencies = len; | |
8d749320 SM |
6274 | pst->dependencies = |
6275 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6276 | for (i = 0; |
6277 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6278 | i, iter); | |
6279 | ++i) | |
6280 | pst->dependencies[i] = iter->v.psymtab; | |
6281 | ||
6282 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6283 | } | |
6284 | ||
6285 | /* Get the list of files included in the current compilation unit, | |
6286 | and build a psymtab for each of them. */ | |
6287 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6288 | ||
b4f54984 | 6289 | if (dwarf_read_debug) |
0018ea6f DE |
6290 | { |
6291 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6292 | ||
6293 | fprintf_unfiltered (gdb_stdlog, | |
6294 | "Psymtab for %s unit @0x%x: %s - %s" | |
6295 | ", %d global, %d static syms\n", | |
6296 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6297 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
6298 | paddress (gdbarch, pst->textlow), |
6299 | paddress (gdbarch, pst->texthigh), | |
6300 | pst->n_global_syms, pst->n_static_syms); | |
6301 | } | |
6302 | } | |
6303 | ||
6304 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6305 | Process compilation unit THIS_CU for a psymtab. */ | |
6306 | ||
6307 | static void | |
6308 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6309 | int want_partial_unit, |
6310 | enum language pretend_language) | |
0018ea6f DE |
6311 | { |
6312 | /* If this compilation unit was already read in, free the | |
6313 | cached copy in order to read it in again. This is | |
6314 | necessary because we skipped some symbols when we first | |
6315 | read in the compilation unit (see load_partial_dies). | |
6316 | This problem could be avoided, but the benefit is unclear. */ | |
6317 | if (this_cu->cu != NULL) | |
6318 | free_one_cached_comp_unit (this_cu); | |
6319 | ||
f1902523 JK |
6320 | if (this_cu->is_debug_types) |
6321 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
6322 | NULL); | |
6323 | else | |
6324 | { | |
6325 | process_psymtab_comp_unit_data info; | |
6326 | info.want_partial_unit = want_partial_unit; | |
6327 | info.pretend_language = pretend_language; | |
6328 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
6329 | process_psymtab_comp_unit_reader, &info); | |
6330 | } | |
0018ea6f DE |
6331 | |
6332 | /* Age out any secondary CUs. */ | |
6333 | age_cached_comp_units (); | |
6334 | } | |
f4dc4d17 DE |
6335 | |
6336 | /* Reader function for build_type_psymtabs. */ | |
6337 | ||
6338 | static void | |
6339 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6340 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6341 | struct die_info *type_unit_die, |
6342 | int has_children, | |
6343 | void *data) | |
6344 | { | |
6345 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6346 | struct dwarf2_cu *cu = reader->cu; | |
6347 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6348 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6349 | struct type_unit_group *tu_group; |
6350 | struct attribute *attr; | |
6351 | struct partial_die_info *first_die; | |
6352 | CORE_ADDR lowpc, highpc; | |
6353 | struct partial_symtab *pst; | |
6354 | ||
6355 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6356 | gdb_assert (per_cu->is_debug_types); |
6357 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6358 | |
6359 | if (! has_children) | |
6360 | return; | |
6361 | ||
6362 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6363 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6364 | |
0186c6a7 | 6365 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6366 | |
6367 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6368 | cu->list_in_scope = &file_symbols; | |
6369 | pst = create_partial_symtab (per_cu, ""); | |
6370 | pst->anonymous = 1; | |
6371 | ||
6372 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6373 | ||
6374 | lowpc = (CORE_ADDR) -1; | |
6375 | highpc = (CORE_ADDR) 0; | |
6376 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6377 | ||
8763cede | 6378 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6379 | } |
6380 | ||
73051182 DE |
6381 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6382 | ||
6383 | struct tu_abbrev_offset | |
6384 | { | |
6385 | struct signatured_type *sig_type; | |
6386 | sect_offset abbrev_offset; | |
6387 | }; | |
6388 | ||
6389 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6390 | ||
6391 | static int | |
6392 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6393 | { | |
9a3c8263 SM |
6394 | const struct tu_abbrev_offset * const *a |
6395 | = (const struct tu_abbrev_offset * const*) ap; | |
6396 | const struct tu_abbrev_offset * const *b | |
6397 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
6398 | sect_offset aoff = (*a)->abbrev_offset; |
6399 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
6400 | |
6401 | return (aoff > boff) - (aoff < boff); | |
6402 | } | |
6403 | ||
6404 | /* Efficiently read all the type units. | |
6405 | This does the bulk of the work for build_type_psymtabs. | |
6406 | ||
6407 | The efficiency is because we sort TUs by the abbrev table they use and | |
6408 | only read each abbrev table once. In one program there are 200K TUs | |
6409 | sharing 8K abbrev tables. | |
6410 | ||
6411 | The main purpose of this function is to support building the | |
6412 | dwarf2_per_objfile->type_unit_groups table. | |
6413 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6414 | can collapse the search space by grouping them by stmt_list. | |
6415 | The savings can be significant, in the same program from above the 200K TUs | |
6416 | share 8K stmt_list tables. | |
6417 | ||
6418 | FUNC is expected to call get_type_unit_group, which will create the | |
6419 | struct type_unit_group if necessary and add it to | |
6420 | dwarf2_per_objfile->type_unit_groups. */ | |
6421 | ||
6422 | static void | |
6423 | build_type_psymtabs_1 (void) | |
6424 | { | |
73051182 DE |
6425 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
6426 | struct cleanup *cleanups; | |
6427 | struct abbrev_table *abbrev_table; | |
6428 | sect_offset abbrev_offset; | |
6429 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
6430 | int i; |
6431 | ||
6432 | /* It's up to the caller to not call us multiple times. */ | |
6433 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6434 | ||
6435 | if (dwarf2_per_objfile->n_type_units == 0) | |
6436 | return; | |
6437 | ||
6438 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6439 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6440 | read each abbrev table in. | |
6441 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6442 | This is simpler and efficient enough for now. | |
6443 | ||
6444 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6445 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6446 | stmt_list value too so in practice this should work well. | |
6447 | ||
6448 | The basic algorithm here is: | |
6449 | ||
6450 | sort TUs by abbrev table | |
6451 | for each TU with same abbrev table: | |
6452 | read abbrev table if first user | |
6453 | read TU top level DIE | |
6454 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6455 | call FUNC */ | |
6456 | ||
b4f54984 | 6457 | if (dwarf_read_debug) |
73051182 DE |
6458 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
6459 | ||
6460 | /* Sort in a separate table to maintain the order of all_type_units | |
6461 | for .gdb_index: TU indices directly index all_type_units. */ | |
6462 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6463 | dwarf2_per_objfile->n_type_units); | |
6464 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6465 | { | |
6466 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6467 | ||
6468 | sorted_by_abbrev[i].sig_type = sig_type; | |
6469 | sorted_by_abbrev[i].abbrev_offset = | |
6470 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 6471 | sig_type->per_cu.sect_off); |
73051182 DE |
6472 | } |
6473 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6474 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6475 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6476 | ||
9c541725 | 6477 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
6478 | abbrev_table = NULL; |
6479 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6480 | ||
6481 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6482 | { | |
6483 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6484 | ||
6485 | /* Switch to the next abbrev table if necessary. */ | |
6486 | if (abbrev_table == NULL | |
9c541725 | 6487 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
6488 | { |
6489 | if (abbrev_table != NULL) | |
6490 | { | |
6491 | abbrev_table_free (abbrev_table); | |
6492 | /* Reset to NULL in case abbrev_table_read_table throws | |
6493 | an error: abbrev_table_free_cleanup will get called. */ | |
6494 | abbrev_table = NULL; | |
6495 | } | |
6496 | abbrev_offset = tu->abbrev_offset; | |
6497 | abbrev_table = | |
6498 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6499 | abbrev_offset); | |
6500 | ++tu_stats->nr_uniq_abbrev_tables; | |
6501 | } | |
6502 | ||
6503 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6504 | build_type_psymtabs_reader, NULL); | |
6505 | } | |
6506 | ||
73051182 | 6507 | do_cleanups (cleanups); |
6aa5f3a6 | 6508 | } |
73051182 | 6509 | |
6aa5f3a6 DE |
6510 | /* Print collected type unit statistics. */ |
6511 | ||
6512 | static void | |
6513 | print_tu_stats (void) | |
6514 | { | |
6515 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6516 | ||
6517 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
6518 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6519 | dwarf2_per_objfile->n_type_units); | |
6520 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6521 | tu_stats->nr_uniq_abbrev_tables); | |
6522 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6523 | tu_stats->nr_symtabs); | |
6524 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6525 | tu_stats->nr_symtab_sharers); | |
6526 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6527 | tu_stats->nr_stmt_less_type_units); | |
6528 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
6529 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
6530 | } |
6531 | ||
f4dc4d17 DE |
6532 | /* Traversal function for build_type_psymtabs. */ |
6533 | ||
6534 | static int | |
6535 | build_type_psymtab_dependencies (void **slot, void *info) | |
6536 | { | |
6537 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6538 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6539 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6540 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6541 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6542 | struct signatured_type *iter; | |
f4dc4d17 DE |
6543 | int i; |
6544 | ||
6545 | gdb_assert (len > 0); | |
0186c6a7 | 6546 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6547 | |
6548 | pst->number_of_dependencies = len; | |
8d749320 SM |
6549 | pst->dependencies = |
6550 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 6551 | for (i = 0; |
0186c6a7 | 6552 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6553 | ++i) |
6554 | { | |
0186c6a7 DE |
6555 | gdb_assert (iter->per_cu.is_debug_types); |
6556 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6557 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6558 | } |
6559 | ||
0186c6a7 | 6560 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6561 | |
6562 | return 1; | |
6563 | } | |
6564 | ||
6565 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6566 | Build partial symbol tables for the .debug_types comp-units. */ | |
6567 | ||
6568 | static void | |
6569 | build_type_psymtabs (struct objfile *objfile) | |
6570 | { | |
0e50663e | 6571 | if (! create_all_type_units (objfile)) |
348e048f DE |
6572 | return; |
6573 | ||
73051182 | 6574 | build_type_psymtabs_1 (); |
6aa5f3a6 | 6575 | } |
f4dc4d17 | 6576 | |
6aa5f3a6 DE |
6577 | /* Traversal function for process_skeletonless_type_unit. |
6578 | Read a TU in a DWO file and build partial symbols for it. */ | |
6579 | ||
6580 | static int | |
6581 | process_skeletonless_type_unit (void **slot, void *info) | |
6582 | { | |
6583 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 6584 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
6585 | struct signatured_type find_entry, *entry; |
6586 | ||
6587 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
6588 | ||
6589 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6590 | { | |
6591 | dwarf2_per_objfile->signatured_types | |
6592 | = allocate_signatured_type_table (objfile); | |
6593 | } | |
6594 | ||
6595 | find_entry.signature = dwo_unit->signature; | |
6596 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
6597 | INSERT); | |
6598 | /* If we've already seen this type there's nothing to do. What's happening | |
6599 | is we're doing our own version of comdat-folding here. */ | |
6600 | if (*slot != NULL) | |
6601 | return 1; | |
6602 | ||
6603 | /* This does the job that create_all_type_units would have done for | |
6604 | this TU. */ | |
6605 | entry = add_type_unit (dwo_unit->signature, slot); | |
6606 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
6607 | *slot = entry; | |
6608 | ||
6609 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6610 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
6611 | build_type_psymtabs_reader, NULL); | |
6612 | ||
6613 | return 1; | |
6614 | } | |
6615 | ||
6616 | /* Traversal function for process_skeletonless_type_units. */ | |
6617 | ||
6618 | static int | |
6619 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
6620 | { | |
6621 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
6622 | ||
6623 | if (dwo_file->tus != NULL) | |
6624 | { | |
6625 | htab_traverse_noresize (dwo_file->tus, | |
6626 | process_skeletonless_type_unit, info); | |
6627 | } | |
6628 | ||
6629 | return 1; | |
6630 | } | |
6631 | ||
6632 | /* Scan all TUs of DWO files, verifying we've processed them. | |
6633 | This is needed in case a TU was emitted without its skeleton. | |
6634 | Note: This can't be done until we know what all the DWO files are. */ | |
6635 | ||
6636 | static void | |
6637 | process_skeletonless_type_units (struct objfile *objfile) | |
6638 | { | |
6639 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
6640 | if (get_dwp_file () == NULL | |
6641 | && dwarf2_per_objfile->dwo_files != NULL) | |
6642 | { | |
6643 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
6644 | process_dwo_file_for_skeletonless_type_units, | |
6645 | objfile); | |
6646 | } | |
348e048f DE |
6647 | } |
6648 | ||
95554aad TT |
6649 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6650 | ||
6651 | static void | |
6652 | set_partial_user (struct objfile *objfile) | |
6653 | { | |
6654 | int i; | |
6655 | ||
6656 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6657 | { | |
8832e7e3 | 6658 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6659 | struct partial_symtab *pst = per_cu->v.psymtab; |
6660 | int j; | |
6661 | ||
36586728 TT |
6662 | if (pst == NULL) |
6663 | continue; | |
6664 | ||
95554aad TT |
6665 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6666 | { | |
6667 | /* Set the 'user' field only if it is not already set. */ | |
6668 | if (pst->dependencies[j]->user == NULL) | |
6669 | pst->dependencies[j]->user = pst; | |
6670 | } | |
6671 | } | |
6672 | } | |
6673 | ||
93311388 DE |
6674 | /* Build the partial symbol table by doing a quick pass through the |
6675 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6676 | |
93311388 | 6677 | static void |
c67a9c90 | 6678 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6679 | { |
791afaa2 | 6680 | struct cleanup *back_to; |
21b2bd31 | 6681 | int i; |
93311388 | 6682 | |
b4f54984 | 6683 | if (dwarf_read_debug) |
45cfd468 DE |
6684 | { |
6685 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6686 | objfile_name (objfile)); |
45cfd468 DE |
6687 | } |
6688 | ||
98bfdba5 PA |
6689 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6690 | ||
be391dca | 6691 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6692 | |
93311388 DE |
6693 | /* Any cached compilation units will be linked by the per-objfile |
6694 | read_in_chain. Make sure to free them when we're done. */ | |
6695 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6696 | |
348e048f DE |
6697 | build_type_psymtabs (objfile); |
6698 | ||
93311388 | 6699 | create_all_comp_units (objfile); |
c906108c | 6700 | |
60606b2c TT |
6701 | /* Create a temporary address map on a temporary obstack. We later |
6702 | copy this to the final obstack. */ | |
8268c778 | 6703 | auto_obstack temp_obstack; |
791afaa2 TT |
6704 | |
6705 | scoped_restore save_psymtabs_addrmap | |
6706 | = make_scoped_restore (&objfile->psymtabs_addrmap, | |
6707 | addrmap_create_mutable (&temp_obstack)); | |
72bf9492 | 6708 | |
21b2bd31 | 6709 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6710 | { |
8832e7e3 | 6711 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6712 | |
b93601f3 | 6713 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6714 | } |
ff013f42 | 6715 | |
6aa5f3a6 DE |
6716 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
6717 | process_skeletonless_type_units (objfile); | |
6718 | ||
6719 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6720 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
6721 | { | |
6722 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6723 | build_type_psymtab_dependencies, NULL); | |
6724 | } | |
6725 | ||
b4f54984 | 6726 | if (dwarf_read_debug) |
6aa5f3a6 DE |
6727 | print_tu_stats (); |
6728 | ||
95554aad TT |
6729 | set_partial_user (objfile); |
6730 | ||
ff013f42 JK |
6731 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6732 | &objfile->objfile_obstack); | |
791afaa2 TT |
6733 | /* At this point we want to keep the address map. */ |
6734 | save_psymtabs_addrmap.release (); | |
ff013f42 | 6735 | |
ae038cb0 | 6736 | do_cleanups (back_to); |
45cfd468 | 6737 | |
b4f54984 | 6738 | if (dwarf_read_debug) |
45cfd468 | 6739 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 6740 | objfile_name (objfile)); |
ae038cb0 DJ |
6741 | } |
6742 | ||
3019eac3 | 6743 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6744 | |
6745 | static void | |
dee91e82 | 6746 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6747 | const gdb_byte *info_ptr, |
dee91e82 DE |
6748 | struct die_info *comp_unit_die, |
6749 | int has_children, | |
6750 | void *data) | |
ae038cb0 | 6751 | { |
dee91e82 | 6752 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6753 | |
95554aad | 6754 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6755 | |
ae038cb0 DJ |
6756 | /* Check if comp unit has_children. |
6757 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6758 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6759 | if (has_children) |
dee91e82 DE |
6760 | load_partial_dies (reader, info_ptr, 0); |
6761 | } | |
98bfdba5 | 6762 | |
dee91e82 DE |
6763 | /* Load the partial DIEs for a secondary CU into memory. |
6764 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6765 | |
dee91e82 DE |
6766 | static void |
6767 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6768 | { | |
f4dc4d17 DE |
6769 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6770 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6771 | } |
6772 | ||
ae038cb0 | 6773 | static void |
36586728 TT |
6774 | read_comp_units_from_section (struct objfile *objfile, |
6775 | struct dwarf2_section_info *section, | |
f1902523 | 6776 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
6777 | unsigned int is_dwz, |
6778 | int *n_allocated, | |
6779 | int *n_comp_units, | |
6780 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6781 | { |
d521ce57 | 6782 | const gdb_byte *info_ptr; |
a32a8923 | 6783 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6784 | |
b4f54984 | 6785 | if (dwarf_read_debug) |
bf6af496 | 6786 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
6787 | get_section_name (section), |
6788 | get_section_file_name (section)); | |
bf6af496 | 6789 | |
36586728 | 6790 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6791 | |
36586728 | 6792 | info_ptr = section->buffer; |
6e70227d | 6793 | |
36586728 | 6794 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6795 | { |
ae038cb0 | 6796 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 6797 | |
9c541725 | 6798 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 6799 | |
f1902523 JK |
6800 | comp_unit_head cu_header; |
6801 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
6802 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
6803 | |
6804 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
6805 | if (cu_header.unit_type != DW_UT_type) |
6806 | { | |
6807 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
6808 | struct dwarf2_per_cu_data); | |
6809 | memset (this_cu, 0, sizeof (*this_cu)); | |
6810 | } | |
6811 | else | |
6812 | { | |
6813 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
6814 | struct signatured_type); | |
6815 | memset (sig_type, 0, sizeof (*sig_type)); | |
6816 | sig_type->signature = cu_header.signature; | |
6817 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
6818 | this_cu = &sig_type->per_cu; | |
6819 | } | |
6820 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 6821 | this_cu->sect_off = sect_off; |
f1902523 | 6822 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 6823 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6824 | this_cu->objfile = objfile; |
8a0459fd | 6825 | this_cu->section = section; |
ae038cb0 | 6826 | |
36586728 | 6827 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6828 | { |
36586728 | 6829 | *n_allocated *= 2; |
224c3ddb SM |
6830 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
6831 | *all_comp_units, *n_allocated); | |
ae038cb0 | 6832 | } |
36586728 TT |
6833 | (*all_comp_units)[*n_comp_units] = this_cu; |
6834 | ++*n_comp_units; | |
ae038cb0 DJ |
6835 | |
6836 | info_ptr = info_ptr + this_cu->length; | |
6837 | } | |
36586728 TT |
6838 | } |
6839 | ||
6840 | /* Create a list of all compilation units in OBJFILE. | |
6841 | This is only done for -readnow and building partial symtabs. */ | |
6842 | ||
6843 | static void | |
6844 | create_all_comp_units (struct objfile *objfile) | |
6845 | { | |
6846 | int n_allocated; | |
6847 | int n_comp_units; | |
6848 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6849 | struct dwz_file *dwz; |
36586728 TT |
6850 | |
6851 | n_comp_units = 0; | |
6852 | n_allocated = 10; | |
8d749320 | 6853 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 6854 | |
f1902523 JK |
6855 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
6856 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
6857 | &n_allocated, &n_comp_units, &all_comp_units); |
6858 | ||
4db1a1dc TT |
6859 | dwz = dwarf2_get_dwz_file (); |
6860 | if (dwz != NULL) | |
f1902523 | 6861 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
6862 | &n_allocated, &n_comp_units, |
6863 | &all_comp_units); | |
ae038cb0 | 6864 | |
8d749320 SM |
6865 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
6866 | struct dwarf2_per_cu_data *, | |
6867 | n_comp_units); | |
ae038cb0 DJ |
6868 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
6869 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6870 | xfree (all_comp_units); | |
6871 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6872 | } |
6873 | ||
5734ee8b | 6874 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 6875 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 6876 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
6877 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
6878 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 6879 | |
72bf9492 DJ |
6880 | static void |
6881 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
6882 | CORE_ADDR *highpc, int set_addrmap, |
6883 | struct dwarf2_cu *cu) | |
c906108c | 6884 | { |
72bf9492 | 6885 | struct partial_die_info *pdi; |
c906108c | 6886 | |
91c24f0a DC |
6887 | /* Now, march along the PDI's, descending into ones which have |
6888 | interesting children but skipping the children of the other ones, | |
6889 | until we reach the end of the compilation unit. */ | |
c906108c | 6890 | |
72bf9492 | 6891 | pdi = first_die; |
91c24f0a | 6892 | |
72bf9492 DJ |
6893 | while (pdi != NULL) |
6894 | { | |
6895 | fixup_partial_die (pdi, cu); | |
c906108c | 6896 | |
f55ee35c | 6897 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6898 | children, so we need to look at them. Ditto for anonymous |
6899 | enums. */ | |
933c6fe4 | 6900 | |
72bf9492 | 6901 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6902 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6903 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6904 | { |
72bf9492 | 6905 | switch (pdi->tag) |
c906108c SS |
6906 | { |
6907 | case DW_TAG_subprogram: | |
cdc07690 | 6908 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 6909 | break; |
72929c62 | 6910 | case DW_TAG_constant: |
c906108c SS |
6911 | case DW_TAG_variable: |
6912 | case DW_TAG_typedef: | |
91c24f0a | 6913 | case DW_TAG_union_type: |
72bf9492 | 6914 | if (!pdi->is_declaration) |
63d06c5c | 6915 | { |
72bf9492 | 6916 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6917 | } |
6918 | break; | |
c906108c | 6919 | case DW_TAG_class_type: |
680b30c7 | 6920 | case DW_TAG_interface_type: |
c906108c | 6921 | case DW_TAG_structure_type: |
72bf9492 | 6922 | if (!pdi->is_declaration) |
c906108c | 6923 | { |
72bf9492 | 6924 | add_partial_symbol (pdi, cu); |
c906108c | 6925 | } |
e98c9e7c TT |
6926 | if (cu->language == language_rust && pdi->has_children) |
6927 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
6928 | set_addrmap, cu); | |
c906108c | 6929 | break; |
91c24f0a | 6930 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6931 | if (!pdi->is_declaration) |
6932 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6933 | break; |
6934 | case DW_TAG_base_type: | |
a02abb62 | 6935 | case DW_TAG_subrange_type: |
c906108c | 6936 | /* File scope base type definitions are added to the partial |
c5aa993b | 6937 | symbol table. */ |
72bf9492 | 6938 | add_partial_symbol (pdi, cu); |
c906108c | 6939 | break; |
d9fa45fe | 6940 | case DW_TAG_namespace: |
cdc07690 | 6941 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 6942 | break; |
5d7cb8df | 6943 | case DW_TAG_module: |
cdc07690 | 6944 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 6945 | break; |
95554aad TT |
6946 | case DW_TAG_imported_unit: |
6947 | { | |
6948 | struct dwarf2_per_cu_data *per_cu; | |
6949 | ||
f4dc4d17 DE |
6950 | /* For now we don't handle imported units in type units. */ |
6951 | if (cu->per_cu->is_debug_types) | |
6952 | { | |
6953 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6954 | " supported in type units [in module %s]"), | |
4262abfb | 6955 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6956 | } |
6957 | ||
9c541725 | 6958 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 6959 | pdi->is_dwz, |
95554aad TT |
6960 | cu->objfile); |
6961 | ||
6962 | /* Go read the partial unit, if needed. */ | |
6963 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6964 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6965 | |
f4dc4d17 | 6966 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6967 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6968 | } |
6969 | break; | |
74921315 KS |
6970 | case DW_TAG_imported_declaration: |
6971 | add_partial_symbol (pdi, cu); | |
6972 | break; | |
c906108c SS |
6973 | default: |
6974 | break; | |
6975 | } | |
6976 | } | |
6977 | ||
72bf9492 DJ |
6978 | /* If the die has a sibling, skip to the sibling. */ |
6979 | ||
6980 | pdi = pdi->die_sibling; | |
6981 | } | |
6982 | } | |
6983 | ||
6984 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6985 | |
72bf9492 | 6986 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 6987 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
6988 | Enumerators are an exception; they use the scope of their parent |
6989 | enumeration type, i.e. the name of the enumeration type is not | |
6990 | prepended to the enumerator. | |
91c24f0a | 6991 | |
72bf9492 DJ |
6992 | There are two complexities. One is DW_AT_specification; in this |
6993 | case "parent" means the parent of the target of the specification, | |
6994 | instead of the direct parent of the DIE. The other is compilers | |
6995 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6996 | the fully qualified name of structure types from their members' | |
6997 | linkage names. This must be done using the DIE's children rather | |
6998 | than the children of any DW_AT_specification target. We only need | |
6999 | to do this for structures at the top level, i.e. if the target of | |
7000 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7001 | have a parent. */ | |
7002 | ||
7003 | /* Compute the scope prefix associated with PDI's parent, in | |
7004 | compilation unit CU. The result will be allocated on CU's | |
7005 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7006 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7007 | static const char * |
72bf9492 DJ |
7008 | partial_die_parent_scope (struct partial_die_info *pdi, |
7009 | struct dwarf2_cu *cu) | |
7010 | { | |
15d034d0 | 7011 | const char *grandparent_scope; |
72bf9492 | 7012 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7013 | |
72bf9492 DJ |
7014 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7015 | then this means the parent of the specification DIE. */ | |
7016 | ||
7017 | real_pdi = pdi; | |
72bf9492 | 7018 | while (real_pdi->has_specification) |
36586728 TT |
7019 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7020 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7021 | |
7022 | parent = real_pdi->die_parent; | |
7023 | if (parent == NULL) | |
7024 | return NULL; | |
7025 | ||
7026 | if (parent->scope_set) | |
7027 | return parent->scope; | |
7028 | ||
7029 | fixup_partial_die (parent, cu); | |
7030 | ||
10b3939b | 7031 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7032 | |
acebe513 UW |
7033 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7034 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7035 | Work around this problem here. */ | |
7036 | if (cu->language == language_cplus | |
6e70227d | 7037 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7038 | && strcmp (parent->name, "::") == 0 |
7039 | && grandparent_scope == NULL) | |
7040 | { | |
7041 | parent->scope = NULL; | |
7042 | parent->scope_set = 1; | |
7043 | return NULL; | |
7044 | } | |
7045 | ||
9c6c53f7 SA |
7046 | if (pdi->tag == DW_TAG_enumerator) |
7047 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7048 | parent->scope = grandparent_scope; | |
7049 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7050 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7051 | || parent->tag == DW_TAG_structure_type |
7052 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7053 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7054 | || parent->tag == DW_TAG_union_type |
7055 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7056 | { |
7057 | if (grandparent_scope == NULL) | |
7058 | parent->scope = parent->name; | |
7059 | else | |
3e43a32a MS |
7060 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7061 | grandparent_scope, | |
f55ee35c | 7062 | parent->name, 0, cu); |
72bf9492 | 7063 | } |
72bf9492 DJ |
7064 | else |
7065 | { | |
7066 | /* FIXME drow/2004-04-01: What should we be doing with | |
7067 | function-local names? For partial symbols, we should probably be | |
7068 | ignoring them. */ | |
7069 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7070 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7071 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7072 | parent->scope = grandparent_scope; |
c906108c SS |
7073 | } |
7074 | ||
72bf9492 DJ |
7075 | parent->scope_set = 1; |
7076 | return parent->scope; | |
7077 | } | |
7078 | ||
7079 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7080 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7081 | |
72bf9492 DJ |
7082 | static char * |
7083 | partial_die_full_name (struct partial_die_info *pdi, | |
7084 | struct dwarf2_cu *cu) | |
7085 | { | |
15d034d0 | 7086 | const char *parent_scope; |
72bf9492 | 7087 | |
98bfdba5 PA |
7088 | /* If this is a template instantiation, we can not work out the |
7089 | template arguments from partial DIEs. So, unfortunately, we have | |
7090 | to go through the full DIEs. At least any work we do building | |
7091 | types here will be reused if full symbols are loaded later. */ | |
7092 | if (pdi->has_template_arguments) | |
7093 | { | |
7094 | fixup_partial_die (pdi, cu); | |
7095 | ||
7096 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7097 | { | |
7098 | struct die_info *die; | |
7099 | struct attribute attr; | |
7100 | struct dwarf2_cu *ref_cu = cu; | |
7101 | ||
b64f50a1 | 7102 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7103 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7104 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7105 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7106 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7107 | ||
7108 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7109 | } | |
7110 | } | |
7111 | ||
72bf9492 DJ |
7112 | parent_scope = partial_die_parent_scope (pdi, cu); |
7113 | if (parent_scope == NULL) | |
7114 | return NULL; | |
7115 | else | |
f55ee35c | 7116 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7117 | } |
7118 | ||
7119 | static void | |
72bf9492 | 7120 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7121 | { |
e7c27a73 | 7122 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7123 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7124 | CORE_ADDR addr = 0; |
15d034d0 | 7125 | const char *actual_name = NULL; |
e142c38c | 7126 | CORE_ADDR baseaddr; |
15d034d0 | 7127 | char *built_actual_name; |
e142c38c DJ |
7128 | |
7129 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7130 | |
15d034d0 TT |
7131 | built_actual_name = partial_die_full_name (pdi, cu); |
7132 | if (built_actual_name != NULL) | |
7133 | actual_name = built_actual_name; | |
63d06c5c | 7134 | |
72bf9492 DJ |
7135 | if (actual_name == NULL) |
7136 | actual_name = pdi->name; | |
7137 | ||
c906108c SS |
7138 | switch (pdi->tag) |
7139 | { | |
7140 | case DW_TAG_subprogram: | |
3e29f34a | 7141 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 7142 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 7143 | { |
2cfa0c8d JB |
7144 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
7145 | of the global scope. But in Ada, we want to be able to access | |
7146 | nested procedures globally. So all Ada subprograms are stored | |
7147 | in the global scope. */ | |
f47fb265 | 7148 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7149 | built_actual_name != NULL, |
f47fb265 MS |
7150 | VAR_DOMAIN, LOC_BLOCK, |
7151 | &objfile->global_psymbols, | |
1762568f | 7152 | addr, cu->language, objfile); |
c906108c SS |
7153 | } |
7154 | else | |
7155 | { | |
f47fb265 | 7156 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7157 | built_actual_name != NULL, |
f47fb265 MS |
7158 | VAR_DOMAIN, LOC_BLOCK, |
7159 | &objfile->static_psymbols, | |
1762568f | 7160 | addr, cu->language, objfile); |
c906108c | 7161 | } |
0c1b455e TT |
7162 | |
7163 | if (pdi->main_subprogram && actual_name != NULL) | |
7164 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7165 | break; |
72929c62 JB |
7166 | case DW_TAG_constant: |
7167 | { | |
af5bf4ad | 7168 | std::vector<partial_symbol *> *list; |
72929c62 JB |
7169 | |
7170 | if (pdi->is_external) | |
7171 | list = &objfile->global_psymbols; | |
7172 | else | |
7173 | list = &objfile->static_psymbols; | |
f47fb265 | 7174 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7175 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 7176 | list, 0, cu->language, objfile); |
72929c62 JB |
7177 | } |
7178 | break; | |
c906108c | 7179 | case DW_TAG_variable: |
95554aad TT |
7180 | if (pdi->d.locdesc) |
7181 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 7182 | |
95554aad | 7183 | if (pdi->d.locdesc |
caac4577 JG |
7184 | && addr == 0 |
7185 | && !dwarf2_per_objfile->has_section_at_zero) | |
7186 | { | |
7187 | /* A global or static variable may also have been stripped | |
7188 | out by the linker if unused, in which case its address | |
7189 | will be nullified; do not add such variables into partial | |
7190 | symbol table then. */ | |
7191 | } | |
7192 | else if (pdi->is_external) | |
c906108c SS |
7193 | { |
7194 | /* Global Variable. | |
7195 | Don't enter into the minimal symbol tables as there is | |
7196 | a minimal symbol table entry from the ELF symbols already. | |
7197 | Enter into partial symbol table if it has a location | |
7198 | descriptor or a type. | |
7199 | If the location descriptor is missing, new_symbol will create | |
7200 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
7201 | be determined from the minimal symbol table whenever the variable | |
7202 | is referenced. | |
7203 | The address for the partial symbol table entry is not | |
7204 | used by GDB, but it comes in handy for debugging partial symbol | |
7205 | table building. */ | |
7206 | ||
95554aad | 7207 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 7208 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7209 | built_actual_name != NULL, |
f47fb265 MS |
7210 | VAR_DOMAIN, LOC_STATIC, |
7211 | &objfile->global_psymbols, | |
1762568f | 7212 | addr + baseaddr, |
f47fb265 | 7213 | cu->language, objfile); |
c906108c SS |
7214 | } |
7215 | else | |
7216 | { | |
ff908ebf AW |
7217 | int has_loc = pdi->d.locdesc != NULL; |
7218 | ||
7219 | /* Static Variable. Skip symbols whose value we cannot know (those | |
7220 | without location descriptors or constant values). */ | |
7221 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 7222 | { |
15d034d0 | 7223 | xfree (built_actual_name); |
decbce07 MS |
7224 | return; |
7225 | } | |
ff908ebf | 7226 | |
f47fb265 | 7227 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7228 | built_actual_name != NULL, |
f47fb265 MS |
7229 | VAR_DOMAIN, LOC_STATIC, |
7230 | &objfile->static_psymbols, | |
ff908ebf | 7231 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 7232 | cu->language, objfile); |
c906108c SS |
7233 | } |
7234 | break; | |
7235 | case DW_TAG_typedef: | |
7236 | case DW_TAG_base_type: | |
a02abb62 | 7237 | case DW_TAG_subrange_type: |
38d518c9 | 7238 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7239 | built_actual_name != NULL, |
176620f1 | 7240 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 7241 | &objfile->static_psymbols, |
1762568f | 7242 | 0, cu->language, objfile); |
c906108c | 7243 | break; |
74921315 | 7244 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
7245 | case DW_TAG_namespace: |
7246 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 7247 | built_actual_name != NULL, |
72bf9492 DJ |
7248 | VAR_DOMAIN, LOC_TYPEDEF, |
7249 | &objfile->global_psymbols, | |
1762568f | 7250 | 0, cu->language, objfile); |
72bf9492 | 7251 | break; |
530e8392 KB |
7252 | case DW_TAG_module: |
7253 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7254 | built_actual_name != NULL, | |
7255 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7256 | &objfile->global_psymbols, | |
1762568f | 7257 | 0, cu->language, objfile); |
530e8392 | 7258 | break; |
c906108c | 7259 | case DW_TAG_class_type: |
680b30c7 | 7260 | case DW_TAG_interface_type: |
c906108c SS |
7261 | case DW_TAG_structure_type: |
7262 | case DW_TAG_union_type: | |
7263 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7264 | /* Skip external references. The DWARF standard says in the section |
7265 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7266 | structure, union or class type is represented by a structure, | |
7267 | union or class entry that does not have a byte size attribute | |
7268 | and that has a DW_AT_declaration attribute." */ | |
7269 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7270 | { |
15d034d0 | 7271 | xfree (built_actual_name); |
decbce07 MS |
7272 | return; |
7273 | } | |
fa4028e9 | 7274 | |
63d06c5c DC |
7275 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7276 | static vs. global. */ | |
38d518c9 | 7277 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7278 | built_actual_name != NULL, |
176620f1 | 7279 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 7280 | cu->language == language_cplus |
63d06c5c DC |
7281 | ? &objfile->global_psymbols |
7282 | : &objfile->static_psymbols, | |
1762568f | 7283 | 0, cu->language, objfile); |
c906108c | 7284 | |
c906108c SS |
7285 | break; |
7286 | case DW_TAG_enumerator: | |
38d518c9 | 7287 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7288 | built_actual_name != NULL, |
176620f1 | 7289 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 7290 | cu->language == language_cplus |
f6fe98ef DJ |
7291 | ? &objfile->global_psymbols |
7292 | : &objfile->static_psymbols, | |
1762568f | 7293 | 0, cu->language, objfile); |
c906108c SS |
7294 | break; |
7295 | default: | |
7296 | break; | |
7297 | } | |
5c4e30ca | 7298 | |
15d034d0 | 7299 | xfree (built_actual_name); |
c906108c SS |
7300 | } |
7301 | ||
5c4e30ca DC |
7302 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7303 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7304 | the name of the enclosing namespace. */ | |
91c24f0a | 7305 | |
72bf9492 DJ |
7306 | static void |
7307 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7308 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7309 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7310 | { |
72bf9492 | 7311 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7312 | |
72bf9492 | 7313 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7314 | |
7315 | /* Now scan partial symbols in that namespace. */ | |
7316 | ||
91c24f0a | 7317 | if (pdi->has_children) |
cdc07690 | 7318 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7319 | } |
7320 | ||
5d7cb8df JK |
7321 | /* Read a partial die corresponding to a Fortran module. */ |
7322 | ||
7323 | static void | |
7324 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7325 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7326 | { |
530e8392 KB |
7327 | /* Add a symbol for the namespace. */ |
7328 | ||
7329 | add_partial_symbol (pdi, cu); | |
7330 | ||
f55ee35c | 7331 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7332 | |
7333 | if (pdi->has_children) | |
cdc07690 | 7334 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7335 | } |
7336 | ||
bc30ff58 JB |
7337 | /* Read a partial die corresponding to a subprogram and create a partial |
7338 | symbol for that subprogram. When the CU language allows it, this | |
7339 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7340 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7341 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7342 | and highest PC values found in PDI. | |
6e70227d | 7343 | |
cdc07690 YQ |
7344 | PDI may also be a lexical block, in which case we simply search |
7345 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7346 | Again, this is only performed when the CU language allows this |
7347 | type of definitions. */ | |
7348 | ||
7349 | static void | |
7350 | add_partial_subprogram (struct partial_die_info *pdi, | |
7351 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7352 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7353 | { |
7354 | if (pdi->tag == DW_TAG_subprogram) | |
7355 | { | |
7356 | if (pdi->has_pc_info) | |
7357 | { | |
7358 | if (pdi->lowpc < *lowpc) | |
7359 | *lowpc = pdi->lowpc; | |
7360 | if (pdi->highpc > *highpc) | |
7361 | *highpc = pdi->highpc; | |
cdc07690 | 7362 | if (set_addrmap) |
5734ee8b | 7363 | { |
5734ee8b | 7364 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7365 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7366 | CORE_ADDR baseaddr; | |
7367 | CORE_ADDR highpc; | |
7368 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7369 | |
7370 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7371 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7372 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7373 | pdi->lowpc + baseaddr); | |
7374 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7375 | pdi->highpc + baseaddr); | |
7376 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7377 | cu->per_cu->v.psymtab); |
5734ee8b | 7378 | } |
481860b3 GB |
7379 | } |
7380 | ||
7381 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7382 | { | |
bc30ff58 | 7383 | if (!pdi->is_declaration) |
e8d05480 JB |
7384 | /* Ignore subprogram DIEs that do not have a name, they are |
7385 | illegal. Do not emit a complaint at this point, we will | |
7386 | do so when we convert this psymtab into a symtab. */ | |
7387 | if (pdi->name) | |
7388 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7389 | } |
7390 | } | |
6e70227d | 7391 | |
bc30ff58 JB |
7392 | if (! pdi->has_children) |
7393 | return; | |
7394 | ||
7395 | if (cu->language == language_ada) | |
7396 | { | |
7397 | pdi = pdi->die_child; | |
7398 | while (pdi != NULL) | |
7399 | { | |
7400 | fixup_partial_die (pdi, cu); | |
7401 | if (pdi->tag == DW_TAG_subprogram | |
7402 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7403 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7404 | pdi = pdi->die_sibling; |
7405 | } | |
7406 | } | |
7407 | } | |
7408 | ||
91c24f0a DC |
7409 | /* Read a partial die corresponding to an enumeration type. */ |
7410 | ||
72bf9492 DJ |
7411 | static void |
7412 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
7413 | struct dwarf2_cu *cu) | |
91c24f0a | 7414 | { |
72bf9492 | 7415 | struct partial_die_info *pdi; |
91c24f0a DC |
7416 | |
7417 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
7418 | add_partial_symbol (enum_pdi, cu); |
7419 | ||
7420 | pdi = enum_pdi->die_child; | |
7421 | while (pdi) | |
91c24f0a | 7422 | { |
72bf9492 | 7423 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7424 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7425 | else |
72bf9492 DJ |
7426 | add_partial_symbol (pdi, cu); |
7427 | pdi = pdi->die_sibling; | |
91c24f0a | 7428 | } |
91c24f0a DC |
7429 | } |
7430 | ||
6caca83c CC |
7431 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7432 | ||
7433 | static unsigned int | |
d521ce57 | 7434 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7435 | { |
7436 | unsigned int bytes_read; | |
7437 | ||
7438 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7439 | } | |
7440 | ||
4bb7a0a7 DJ |
7441 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7442 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7443 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7444 | the initial number. */ | |
7445 | ||
7446 | static struct abbrev_info * | |
d521ce57 | 7447 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7448 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7449 | { |
7450 | bfd *abfd = cu->objfile->obfd; | |
7451 | unsigned int abbrev_number; | |
7452 | struct abbrev_info *abbrev; | |
7453 | ||
7454 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7455 | ||
7456 | if (abbrev_number == 0) | |
7457 | return NULL; | |
7458 | ||
433df2d4 | 7459 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7460 | if (!abbrev) |
7461 | { | |
422b9917 DE |
7462 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
7463 | " at offset 0x%x [in module %s]"), | |
7464 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 7465 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
7466 | } |
7467 | ||
7468 | return abbrev; | |
7469 | } | |
7470 | ||
93311388 DE |
7471 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7472 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7473 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7474 | ||
d521ce57 TT |
7475 | static const gdb_byte * |
7476 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7477 | { |
dee91e82 | 7478 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7479 | struct abbrev_info *abbrev; |
7480 | unsigned int bytes_read; | |
7481 | ||
7482 | while (1) | |
7483 | { | |
7484 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7485 | if (abbrev == NULL) | |
7486 | return info_ptr + bytes_read; | |
7487 | else | |
dee91e82 | 7488 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7489 | } |
7490 | } | |
7491 | ||
93311388 DE |
7492 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7493 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7494 | abbrev corresponding to that skipped uleb128 should be passed in |
7495 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7496 | children. */ | |
7497 | ||
d521ce57 TT |
7498 | static const gdb_byte * |
7499 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7500 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7501 | { |
7502 | unsigned int bytes_read; | |
7503 | struct attribute attr; | |
dee91e82 DE |
7504 | bfd *abfd = reader->abfd; |
7505 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7506 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7507 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
7508 | unsigned int form, i; |
7509 | ||
7510 | for (i = 0; i < abbrev->num_attrs; i++) | |
7511 | { | |
7512 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7513 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7514 | { | |
dee91e82 | 7515 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7516 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7517 | complaint (&symfile_complaints, |
7518 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7519 | else |
b9502d3f | 7520 | { |
9c541725 PA |
7521 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
7522 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
7523 | |
7524 | if (sibling_ptr < info_ptr) | |
7525 | complaint (&symfile_complaints, | |
7526 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7527 | else if (sibling_ptr > reader->buffer_end) |
7528 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7529 | else |
7530 | return sibling_ptr; | |
7531 | } | |
4bb7a0a7 DJ |
7532 | } |
7533 | ||
7534 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7535 | form = abbrev->attrs[i].form; | |
7536 | skip_attribute: | |
7537 | switch (form) | |
7538 | { | |
4bb7a0a7 | 7539 | case DW_FORM_ref_addr: |
ae411497 TT |
7540 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7541 | and later it is offset sized. */ | |
7542 | if (cu->header.version == 2) | |
7543 | info_ptr += cu->header.addr_size; | |
7544 | else | |
7545 | info_ptr += cu->header.offset_size; | |
7546 | break; | |
36586728 TT |
7547 | case DW_FORM_GNU_ref_alt: |
7548 | info_ptr += cu->header.offset_size; | |
7549 | break; | |
ae411497 | 7550 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7551 | info_ptr += cu->header.addr_size; |
7552 | break; | |
7553 | case DW_FORM_data1: | |
7554 | case DW_FORM_ref1: | |
7555 | case DW_FORM_flag: | |
7556 | info_ptr += 1; | |
7557 | break; | |
2dc7f7b3 | 7558 | case DW_FORM_flag_present: |
43988095 | 7559 | case DW_FORM_implicit_const: |
2dc7f7b3 | 7560 | break; |
4bb7a0a7 DJ |
7561 | case DW_FORM_data2: |
7562 | case DW_FORM_ref2: | |
7563 | info_ptr += 2; | |
7564 | break; | |
7565 | case DW_FORM_data4: | |
7566 | case DW_FORM_ref4: | |
7567 | info_ptr += 4; | |
7568 | break; | |
7569 | case DW_FORM_data8: | |
7570 | case DW_FORM_ref8: | |
55f1336d | 7571 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7572 | info_ptr += 8; |
7573 | break; | |
0224619f JK |
7574 | case DW_FORM_data16: |
7575 | info_ptr += 16; | |
7576 | break; | |
4bb7a0a7 | 7577 | case DW_FORM_string: |
9b1c24c8 | 7578 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7579 | info_ptr += bytes_read; |
7580 | break; | |
2dc7f7b3 | 7581 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7582 | case DW_FORM_strp: |
36586728 | 7583 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7584 | info_ptr += cu->header.offset_size; |
7585 | break; | |
2dc7f7b3 | 7586 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7587 | case DW_FORM_block: |
7588 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7589 | info_ptr += bytes_read; | |
7590 | break; | |
7591 | case DW_FORM_block1: | |
7592 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7593 | break; | |
7594 | case DW_FORM_block2: | |
7595 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7596 | break; | |
7597 | case DW_FORM_block4: | |
7598 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7599 | break; | |
7600 | case DW_FORM_sdata: | |
7601 | case DW_FORM_udata: | |
7602 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7603 | case DW_FORM_GNU_addr_index: |
7604 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7605 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7606 | break; |
7607 | case DW_FORM_indirect: | |
7608 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7609 | info_ptr += bytes_read; | |
7610 | /* We need to continue parsing from here, so just go back to | |
7611 | the top. */ | |
7612 | goto skip_attribute; | |
7613 | ||
7614 | default: | |
3e43a32a MS |
7615 | error (_("Dwarf Error: Cannot handle %s " |
7616 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7617 | dwarf_form_name (form), |
7618 | bfd_get_filename (abfd)); | |
7619 | } | |
7620 | } | |
7621 | ||
7622 | if (abbrev->has_children) | |
dee91e82 | 7623 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7624 | else |
7625 | return info_ptr; | |
7626 | } | |
7627 | ||
93311388 | 7628 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7629 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7630 | |
d521ce57 | 7631 | static const gdb_byte * |
dee91e82 DE |
7632 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7633 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7634 | const gdb_byte *info_ptr) |
91c24f0a DC |
7635 | { |
7636 | /* Do we know the sibling already? */ | |
72bf9492 | 7637 | |
91c24f0a DC |
7638 | if (orig_pdi->sibling) |
7639 | return orig_pdi->sibling; | |
7640 | ||
7641 | /* Are there any children to deal with? */ | |
7642 | ||
7643 | if (!orig_pdi->has_children) | |
7644 | return info_ptr; | |
7645 | ||
4bb7a0a7 | 7646 | /* Skip the children the long way. */ |
91c24f0a | 7647 | |
dee91e82 | 7648 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7649 | } |
7650 | ||
257e7a09 | 7651 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7652 | not NULL. */ |
c906108c SS |
7653 | |
7654 | static void | |
257e7a09 YQ |
7655 | dwarf2_read_symtab (struct partial_symtab *self, |
7656 | struct objfile *objfile) | |
c906108c | 7657 | { |
257e7a09 | 7658 | if (self->readin) |
c906108c | 7659 | { |
442e4d9c | 7660 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7661 | self->filename); |
442e4d9c YQ |
7662 | } |
7663 | else | |
7664 | { | |
7665 | if (info_verbose) | |
c906108c | 7666 | { |
442e4d9c | 7667 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7668 | self->filename); |
442e4d9c | 7669 | gdb_flush (gdb_stdout); |
c906108c | 7670 | } |
c906108c | 7671 | |
442e4d9c | 7672 | /* Restore our global data. */ |
9a3c8263 SM |
7673 | dwarf2_per_objfile |
7674 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
7675 | dwarf2_objfile_data_key); | |
10b3939b | 7676 | |
442e4d9c YQ |
7677 | /* If this psymtab is constructed from a debug-only objfile, the |
7678 | has_section_at_zero flag will not necessarily be correct. We | |
7679 | can get the correct value for this flag by looking at the data | |
7680 | associated with the (presumably stripped) associated objfile. */ | |
7681 | if (objfile->separate_debug_objfile_backlink) | |
7682 | { | |
7683 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
7684 | = ((struct dwarf2_per_objfile *) |
7685 | objfile_data (objfile->separate_debug_objfile_backlink, | |
7686 | dwarf2_objfile_data_key)); | |
9a619af0 | 7687 | |
442e4d9c YQ |
7688 | dwarf2_per_objfile->has_section_at_zero |
7689 | = dpo_backlink->has_section_at_zero; | |
7690 | } | |
b2ab525c | 7691 | |
442e4d9c | 7692 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7693 | |
257e7a09 | 7694 | psymtab_to_symtab_1 (self); |
c906108c | 7695 | |
442e4d9c YQ |
7696 | /* Finish up the debug error message. */ |
7697 | if (info_verbose) | |
7698 | printf_filtered (_("done.\n")); | |
c906108c | 7699 | } |
95554aad TT |
7700 | |
7701 | process_cu_includes (); | |
c906108c | 7702 | } |
9cdd5dbd DE |
7703 | \f |
7704 | /* Reading in full CUs. */ | |
c906108c | 7705 | |
10b3939b DJ |
7706 | /* Add PER_CU to the queue. */ |
7707 | ||
7708 | static void | |
95554aad TT |
7709 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7710 | enum language pretend_language) | |
10b3939b DJ |
7711 | { |
7712 | struct dwarf2_queue_item *item; | |
7713 | ||
7714 | per_cu->queued = 1; | |
8d749320 | 7715 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 7716 | item->per_cu = per_cu; |
95554aad | 7717 | item->pretend_language = pretend_language; |
10b3939b DJ |
7718 | item->next = NULL; |
7719 | ||
7720 | if (dwarf2_queue == NULL) | |
7721 | dwarf2_queue = item; | |
7722 | else | |
7723 | dwarf2_queue_tail->next = item; | |
7724 | ||
7725 | dwarf2_queue_tail = item; | |
7726 | } | |
7727 | ||
89e63ee4 DE |
7728 | /* If PER_CU is not yet queued, add it to the queue. |
7729 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7730 | dependency. | |
0907af0c | 7731 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7732 | meaning either PER_CU is already queued or it is already loaded. |
7733 | ||
7734 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7735 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7736 | |
7737 | static int | |
89e63ee4 | 7738 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7739 | struct dwarf2_per_cu_data *per_cu, |
7740 | enum language pretend_language) | |
7741 | { | |
7742 | /* We may arrive here during partial symbol reading, if we need full | |
7743 | DIEs to process an unusual case (e.g. template arguments). Do | |
7744 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7745 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7746 | { | |
7747 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7748 | return 1; | |
7749 | return 0; | |
7750 | } | |
7751 | ||
7752 | /* Mark the dependence relation so that we don't flush PER_CU | |
7753 | too early. */ | |
89e63ee4 DE |
7754 | if (dependent_cu != NULL) |
7755 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7756 | |
7757 | /* If it's already on the queue, we have nothing to do. */ | |
7758 | if (per_cu->queued) | |
7759 | return 0; | |
7760 | ||
7761 | /* If the compilation unit is already loaded, just mark it as | |
7762 | used. */ | |
7763 | if (per_cu->cu != NULL) | |
7764 | { | |
7765 | per_cu->cu->last_used = 0; | |
7766 | return 0; | |
7767 | } | |
7768 | ||
7769 | /* Add it to the queue. */ | |
7770 | queue_comp_unit (per_cu, pretend_language); | |
7771 | ||
7772 | return 1; | |
7773 | } | |
7774 | ||
10b3939b DJ |
7775 | /* Process the queue. */ |
7776 | ||
7777 | static void | |
a0f42c21 | 7778 | process_queue (void) |
10b3939b DJ |
7779 | { |
7780 | struct dwarf2_queue_item *item, *next_item; | |
7781 | ||
b4f54984 | 7782 | if (dwarf_read_debug) |
45cfd468 DE |
7783 | { |
7784 | fprintf_unfiltered (gdb_stdlog, | |
7785 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7786 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7787 | } |
7788 | ||
03dd20cc DJ |
7789 | /* The queue starts out with one item, but following a DIE reference |
7790 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7791 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7792 | { | |
cc12ce38 DE |
7793 | if ((dwarf2_per_objfile->using_index |
7794 | ? !item->per_cu->v.quick->compunit_symtab | |
7795 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
7796 | /* Skip dummy CUs. */ | |
7797 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
7798 | { |
7799 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7800 | unsigned int debug_print_threshold; |
247f5c4f | 7801 | char buf[100]; |
f4dc4d17 | 7802 | |
247f5c4f | 7803 | if (per_cu->is_debug_types) |
f4dc4d17 | 7804 | { |
247f5c4f DE |
7805 | struct signatured_type *sig_type = |
7806 | (struct signatured_type *) per_cu; | |
7807 | ||
7808 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 7809 | hex_string (sig_type->signature), |
9c541725 | 7810 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
7811 | /* There can be 100s of TUs. |
7812 | Only print them in verbose mode. */ | |
7813 | debug_print_threshold = 2; | |
f4dc4d17 | 7814 | } |
247f5c4f | 7815 | else |
73be47f5 | 7816 | { |
9c541725 PA |
7817 | sprintf (buf, "CU at offset 0x%x", |
7818 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
7819 | debug_print_threshold = 1; |
7820 | } | |
247f5c4f | 7821 | |
b4f54984 | 7822 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7823 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7824 | |
7825 | if (per_cu->is_debug_types) | |
7826 | process_full_type_unit (per_cu, item->pretend_language); | |
7827 | else | |
7828 | process_full_comp_unit (per_cu, item->pretend_language); | |
7829 | ||
b4f54984 | 7830 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7831 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7832 | } |
10b3939b DJ |
7833 | |
7834 | item->per_cu->queued = 0; | |
7835 | next_item = item->next; | |
7836 | xfree (item); | |
7837 | } | |
7838 | ||
7839 | dwarf2_queue_tail = NULL; | |
45cfd468 | 7840 | |
b4f54984 | 7841 | if (dwarf_read_debug) |
45cfd468 DE |
7842 | { |
7843 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7844 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7845 | } |
10b3939b DJ |
7846 | } |
7847 | ||
7848 | /* Free all allocated queue entries. This function only releases anything if | |
7849 | an error was thrown; if the queue was processed then it would have been | |
7850 | freed as we went along. */ | |
7851 | ||
7852 | static void | |
7853 | dwarf2_release_queue (void *dummy) | |
7854 | { | |
7855 | struct dwarf2_queue_item *item, *last; | |
7856 | ||
7857 | item = dwarf2_queue; | |
7858 | while (item) | |
7859 | { | |
7860 | /* Anything still marked queued is likely to be in an | |
7861 | inconsistent state, so discard it. */ | |
7862 | if (item->per_cu->queued) | |
7863 | { | |
7864 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7865 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7866 | item->per_cu->queued = 0; |
7867 | } | |
7868 | ||
7869 | last = item; | |
7870 | item = item->next; | |
7871 | xfree (last); | |
7872 | } | |
7873 | ||
7874 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7875 | } | |
7876 | ||
7877 | /* Read in full symbols for PST, and anything it depends on. */ | |
7878 | ||
c906108c | 7879 | static void |
fba45db2 | 7880 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7881 | { |
10b3939b | 7882 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7883 | int i; |
7884 | ||
95554aad TT |
7885 | if (pst->readin) |
7886 | return; | |
7887 | ||
aaa75496 | 7888 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7889 | if (!pst->dependencies[i]->readin |
7890 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7891 | { |
7892 | /* Inform about additional files that need to be read in. */ | |
7893 | if (info_verbose) | |
7894 | { | |
a3f17187 | 7895 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7896 | fputs_filtered (" ", gdb_stdout); |
7897 | wrap_here (""); | |
7898 | fputs_filtered ("and ", gdb_stdout); | |
7899 | wrap_here (""); | |
7900 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7901 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7902 | gdb_flush (gdb_stdout); |
7903 | } | |
7904 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7905 | } | |
7906 | ||
9a3c8263 | 7907 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
7908 | |
7909 | if (per_cu == NULL) | |
aaa75496 JB |
7910 | { |
7911 | /* It's an include file, no symbols to read for it. | |
7912 | Everything is in the parent symtab. */ | |
7913 | pst->readin = 1; | |
7914 | return; | |
7915 | } | |
c906108c | 7916 | |
a0f42c21 | 7917 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7918 | } |
7919 | ||
dee91e82 DE |
7920 | /* Trivial hash function for die_info: the hash value of a DIE |
7921 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7922 | |
dee91e82 DE |
7923 | static hashval_t |
7924 | die_hash (const void *item) | |
10b3939b | 7925 | { |
9a3c8263 | 7926 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 7927 | |
9c541725 | 7928 | return to_underlying (die->sect_off); |
dee91e82 | 7929 | } |
63d06c5c | 7930 | |
dee91e82 DE |
7931 | /* Trivial comparison function for die_info structures: two DIEs |
7932 | are equal if they have the same offset. */ | |
98bfdba5 | 7933 | |
dee91e82 DE |
7934 | static int |
7935 | die_eq (const void *item_lhs, const void *item_rhs) | |
7936 | { | |
9a3c8263 SM |
7937 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
7938 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 7939 | |
9c541725 | 7940 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 7941 | } |
c906108c | 7942 | |
dee91e82 DE |
7943 | /* die_reader_func for load_full_comp_unit. |
7944 | This is identical to read_signatured_type_reader, | |
7945 | but is kept separate for now. */ | |
c906108c | 7946 | |
dee91e82 DE |
7947 | static void |
7948 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7949 | const gdb_byte *info_ptr, |
dee91e82 DE |
7950 | struct die_info *comp_unit_die, |
7951 | int has_children, | |
7952 | void *data) | |
7953 | { | |
7954 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 7955 | enum language *language_ptr = (enum language *) data; |
6caca83c | 7956 | |
dee91e82 DE |
7957 | gdb_assert (cu->die_hash == NULL); |
7958 | cu->die_hash = | |
7959 | htab_create_alloc_ex (cu->header.length / 12, | |
7960 | die_hash, | |
7961 | die_eq, | |
7962 | NULL, | |
7963 | &cu->comp_unit_obstack, | |
7964 | hashtab_obstack_allocate, | |
7965 | dummy_obstack_deallocate); | |
e142c38c | 7966 | |
dee91e82 DE |
7967 | if (has_children) |
7968 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7969 | &info_ptr, comp_unit_die); | |
7970 | cu->dies = comp_unit_die; | |
7971 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7972 | |
7973 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7974 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7975 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7976 | or we won't be able to build types correctly. |
7977 | Similarly, if we do not read the producer, we can not apply | |
7978 | producer-specific interpretation. */ | |
95554aad | 7979 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7980 | } |
10b3939b | 7981 | |
dee91e82 | 7982 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7983 | |
dee91e82 | 7984 | static void |
95554aad TT |
7985 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7986 | enum language pretend_language) | |
dee91e82 | 7987 | { |
3019eac3 | 7988 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7989 | |
f4dc4d17 DE |
7990 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7991 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7992 | } |
7993 | ||
3da10d80 KS |
7994 | /* Add a DIE to the delayed physname list. */ |
7995 | ||
7996 | static void | |
7997 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7998 | const char *name, struct die_info *die, | |
7999 | struct dwarf2_cu *cu) | |
8000 | { | |
8001 | struct delayed_method_info mi; | |
8002 | mi.type = type; | |
8003 | mi.fnfield_index = fnfield_index; | |
8004 | mi.index = index; | |
8005 | mi.name = name; | |
8006 | mi.die = die; | |
8007 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8008 | } | |
8009 | ||
8010 | /* A cleanup for freeing the delayed method list. */ | |
8011 | ||
8012 | static void | |
8013 | free_delayed_list (void *ptr) | |
8014 | { | |
8015 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8016 | if (cu->method_list != NULL) | |
8017 | { | |
8018 | VEC_free (delayed_method_info, cu->method_list); | |
8019 | cu->method_list = NULL; | |
8020 | } | |
8021 | } | |
8022 | ||
3693fdb3 PA |
8023 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8024 | "const" / "volatile". If so, decrements LEN by the length of the | |
8025 | modifier and return true. Otherwise return false. */ | |
8026 | ||
8027 | template<size_t N> | |
8028 | static bool | |
8029 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8030 | { | |
8031 | size_t mod_len = sizeof (mod) - 1; | |
8032 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8033 | { | |
8034 | len -= mod_len; | |
8035 | return true; | |
8036 | } | |
8037 | return false; | |
8038 | } | |
8039 | ||
3da10d80 KS |
8040 | /* Compute the physnames of any methods on the CU's method list. |
8041 | ||
8042 | The computation of method physnames is delayed in order to avoid the | |
8043 | (bad) condition that one of the method's formal parameters is of an as yet | |
8044 | incomplete type. */ | |
8045 | ||
8046 | static void | |
8047 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8048 | { | |
8049 | int i; | |
8050 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8051 | |
8052 | /* Only C++ delays computing physnames. */ | |
8053 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8054 | return; | |
8055 | gdb_assert (cu->language == language_cplus); | |
8056 | ||
3da10d80 KS |
8057 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8058 | { | |
1d06ead6 | 8059 | const char *physname; |
3da10d80 KS |
8060 | struct fn_fieldlist *fn_flp |
8061 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8062 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8063 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8064 | = physname ? physname : ""; | |
3693fdb3 PA |
8065 | |
8066 | /* Since there's no tag to indicate whether a method is a | |
8067 | const/volatile overload, extract that information out of the | |
8068 | demangled name. */ | |
8069 | if (physname != NULL) | |
8070 | { | |
8071 | size_t len = strlen (physname); | |
8072 | ||
8073 | while (1) | |
8074 | { | |
8075 | if (physname[len] == ')') /* shortcut */ | |
8076 | break; | |
8077 | else if (check_modifier (physname, len, " const")) | |
8078 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8079 | else if (check_modifier (physname, len, " volatile")) | |
8080 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8081 | else | |
8082 | break; | |
8083 | } | |
8084 | } | |
3da10d80 KS |
8085 | } |
8086 | } | |
8087 | ||
a766d390 DE |
8088 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8089 | and it's not clear if/how imported objects will appear. | |
8090 | To keep Go support simple until that's worked out, | |
8091 | go back through what we've read and create something usable. | |
8092 | We could do this while processing each DIE, and feels kinda cleaner, | |
8093 | but that way is more invasive. | |
8094 | This is to, for example, allow the user to type "p var" or "b main" | |
8095 | without having to specify the package name, and allow lookups | |
8096 | of module.object to work in contexts that use the expression | |
8097 | parser. */ | |
8098 | ||
8099 | static void | |
8100 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8101 | { | |
8102 | char *package_name = NULL; | |
8103 | struct pending *list; | |
8104 | int i; | |
8105 | ||
8106 | for (list = global_symbols; list != NULL; list = list->next) | |
8107 | { | |
8108 | for (i = 0; i < list->nsyms; ++i) | |
8109 | { | |
8110 | struct symbol *sym = list->symbol[i]; | |
8111 | ||
8112 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8113 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8114 | { | |
8115 | char *this_package_name = go_symbol_package_name (sym); | |
8116 | ||
8117 | if (this_package_name == NULL) | |
8118 | continue; | |
8119 | if (package_name == NULL) | |
8120 | package_name = this_package_name; | |
8121 | else | |
8122 | { | |
8123 | if (strcmp (package_name, this_package_name) != 0) | |
8124 | complaint (&symfile_complaints, | |
8125 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8126 | (symbol_symtab (sym) != NULL |
8127 | ? symtab_to_filename_for_display | |
8128 | (symbol_symtab (sym)) | |
4262abfb | 8129 | : objfile_name (cu->objfile)), |
a766d390 DE |
8130 | this_package_name, package_name); |
8131 | xfree (this_package_name); | |
8132 | } | |
8133 | } | |
8134 | } | |
8135 | } | |
8136 | ||
8137 | if (package_name != NULL) | |
8138 | { | |
8139 | struct objfile *objfile = cu->objfile; | |
34a68019 | 8140 | const char *saved_package_name |
224c3ddb SM |
8141 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
8142 | package_name, | |
8143 | strlen (package_name)); | |
19f392bc UW |
8144 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8145 | saved_package_name); | |
a766d390 DE |
8146 | struct symbol *sym; |
8147 | ||
8148 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
8149 | ||
e623cf5d | 8150 | sym = allocate_symbol (objfile); |
f85f34ed | 8151 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
8152 | SYMBOL_SET_NAMES (sym, saved_package_name, |
8153 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
8154 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8155 | e.g., "main" finds the "main" module and not C's main(). */ | |
8156 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8157 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8158 | SYMBOL_TYPE (sym) = type; |
8159 | ||
8160 | add_symbol_to_list (sym, &global_symbols); | |
8161 | ||
8162 | xfree (package_name); | |
8163 | } | |
8164 | } | |
8165 | ||
95554aad TT |
8166 | /* Return the symtab for PER_CU. This works properly regardless of |
8167 | whether we're using the index or psymtabs. */ | |
8168 | ||
43f3e411 DE |
8169 | static struct compunit_symtab * |
8170 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
8171 | { |
8172 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
8173 | ? per_cu->v.quick->compunit_symtab |
8174 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
8175 | } |
8176 | ||
8177 | /* A helper function for computing the list of all symbol tables | |
8178 | included by PER_CU. */ | |
8179 | ||
8180 | static void | |
43f3e411 | 8181 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 8182 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 8183 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 8184 | struct compunit_symtab *immediate_parent) |
95554aad TT |
8185 | { |
8186 | void **slot; | |
8187 | int ix; | |
43f3e411 | 8188 | struct compunit_symtab *cust; |
95554aad TT |
8189 | struct dwarf2_per_cu_data *iter; |
8190 | ||
8191 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
8192 | if (*slot != NULL) | |
8193 | { | |
8194 | /* This inclusion and its children have been processed. */ | |
8195 | return; | |
8196 | } | |
8197 | ||
8198 | *slot = per_cu; | |
8199 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
8200 | cust = get_compunit_symtab (per_cu); |
8201 | if (cust != NULL) | |
ec94af83 DE |
8202 | { |
8203 | /* If this is a type unit only add its symbol table if we haven't | |
8204 | seen it yet (type unit per_cu's can share symtabs). */ | |
8205 | if (per_cu->is_debug_types) | |
8206 | { | |
43f3e411 | 8207 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
8208 | if (*slot == NULL) |
8209 | { | |
43f3e411 DE |
8210 | *slot = cust; |
8211 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
8212 | if (cust->user == NULL) | |
8213 | cust->user = immediate_parent; | |
ec94af83 DE |
8214 | } |
8215 | } | |
8216 | else | |
f9125b6c | 8217 | { |
43f3e411 DE |
8218 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
8219 | if (cust->user == NULL) | |
8220 | cust->user = immediate_parent; | |
f9125b6c | 8221 | } |
ec94af83 | 8222 | } |
95554aad TT |
8223 | |
8224 | for (ix = 0; | |
796a7ff8 | 8225 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 8226 | ++ix) |
ec94af83 DE |
8227 | { |
8228 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 8229 | all_type_symtabs, iter, cust); |
ec94af83 | 8230 | } |
95554aad TT |
8231 | } |
8232 | ||
43f3e411 | 8233 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
8234 | PER_CU. */ |
8235 | ||
8236 | static void | |
43f3e411 | 8237 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 8238 | { |
f4dc4d17 DE |
8239 | gdb_assert (! per_cu->is_debug_types); |
8240 | ||
796a7ff8 | 8241 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
8242 | { |
8243 | int ix, len; | |
ec94af83 | 8244 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
8245 | struct compunit_symtab *compunit_symtab_iter; |
8246 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 8247 | htab_t all_children, all_type_symtabs; |
43f3e411 | 8248 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
8249 | |
8250 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 8251 | if (cust == NULL) |
95554aad TT |
8252 | return; |
8253 | ||
8254 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
8255 | NULL, xcalloc, xfree); | |
ec94af83 DE |
8256 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
8257 | NULL, xcalloc, xfree); | |
95554aad TT |
8258 | |
8259 | for (ix = 0; | |
796a7ff8 | 8260 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 8261 | ix, per_cu_iter); |
95554aad | 8262 | ++ix) |
ec94af83 DE |
8263 | { |
8264 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 8265 | all_type_symtabs, per_cu_iter, |
43f3e411 | 8266 | cust); |
ec94af83 | 8267 | } |
95554aad | 8268 | |
ec94af83 | 8269 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
8270 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
8271 | cust->includes | |
8d749320 SM |
8272 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
8273 | struct compunit_symtab *, len + 1); | |
95554aad | 8274 | for (ix = 0; |
43f3e411 DE |
8275 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
8276 | compunit_symtab_iter); | |
95554aad | 8277 | ++ix) |
43f3e411 DE |
8278 | cust->includes[ix] = compunit_symtab_iter; |
8279 | cust->includes[len] = NULL; | |
95554aad | 8280 | |
43f3e411 | 8281 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 8282 | htab_delete (all_children); |
ec94af83 | 8283 | htab_delete (all_type_symtabs); |
95554aad TT |
8284 | } |
8285 | } | |
8286 | ||
8287 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
8288 | read. */ | |
8289 | ||
8290 | static void | |
8291 | process_cu_includes (void) | |
8292 | { | |
8293 | int ix; | |
8294 | struct dwarf2_per_cu_data *iter; | |
8295 | ||
8296 | for (ix = 0; | |
8297 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8298 | ix, iter); | |
8299 | ++ix) | |
f4dc4d17 DE |
8300 | { |
8301 | if (! iter->is_debug_types) | |
43f3e411 | 8302 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8303 | } |
95554aad TT |
8304 | |
8305 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8306 | } | |
8307 | ||
9cdd5dbd | 8308 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8309 | already been loaded into memory. */ |
8310 | ||
8311 | static void | |
95554aad TT |
8312 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8313 | enum language pretend_language) | |
10b3939b | 8314 | { |
10b3939b | 8315 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8316 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8317 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8318 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8319 | struct compunit_symtab *cust; |
33c7c59d | 8320 | struct cleanup *delayed_list_cleanup; |
10b3939b | 8321 | CORE_ADDR baseaddr; |
4359dff1 | 8322 | struct block *static_block; |
3e29f34a | 8323 | CORE_ADDR addr; |
10b3939b DJ |
8324 | |
8325 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8326 | ||
10b3939b | 8327 | buildsym_init (); |
33c7c59d | 8328 | scoped_free_pendings free_pending; |
3da10d80 | 8329 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8330 | |
8331 | cu->list_in_scope = &file_symbols; | |
c906108c | 8332 | |
95554aad TT |
8333 | cu->language = pretend_language; |
8334 | cu->language_defn = language_def (cu->language); | |
8335 | ||
c906108c | 8336 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8337 | process_die (cu->dies, cu); |
c906108c | 8338 | |
a766d390 DE |
8339 | /* For now fudge the Go package. */ |
8340 | if (cu->language == language_go) | |
8341 | fixup_go_packaging (cu); | |
8342 | ||
3da10d80 KS |
8343 | /* Now that we have processed all the DIEs in the CU, all the types |
8344 | should be complete, and it should now be safe to compute all of the | |
8345 | physnames. */ | |
8346 | compute_delayed_physnames (cu); | |
8347 | do_cleanups (delayed_list_cleanup); | |
8348 | ||
fae299cd DC |
8349 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8350 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8351 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8352 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8353 | |
3e29f34a MR |
8354 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8355 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8356 | |
8357 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8358 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8359 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8360 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8361 | this comp unit. */ | |
8362 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8363 | ||
43f3e411 DE |
8364 | cust = end_symtab_from_static_block (static_block, |
8365 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8366 | |
43f3e411 | 8367 | if (cust != NULL) |
c906108c | 8368 | { |
df15bd07 | 8369 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8370 | |
8be455d7 JK |
8371 | /* Set symtab language to language from DW_AT_language. If the |
8372 | compilation is from a C file generated by language preprocessors, do | |
8373 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8374 | if (!(cu->language == language_c |
40e3ad0e | 8375 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8376 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8377 | |
8378 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8379 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8380 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8381 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8382 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8383 | |
8384 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8385 | needed, it would be wrong due to missing DW_AT_producer there. | |
8386 | ||
8387 | Still one can confuse GDB by using non-standard GCC compilation | |
8388 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8389 | */ | |
ab260dad | 8390 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8391 | cust->locations_valid = 1; |
e0d00bc7 JK |
8392 | |
8393 | if (gcc_4_minor >= 5) | |
43f3e411 | 8394 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8395 | |
43f3e411 | 8396 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8397 | } |
9291a0cd TT |
8398 | |
8399 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8400 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8401 | else |
8402 | { | |
8403 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8404 | pst->compunit_symtab = cust; |
9291a0cd TT |
8405 | pst->readin = 1; |
8406 | } | |
c906108c | 8407 | |
95554aad TT |
8408 | /* Push it for inclusion processing later. */ |
8409 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
f4dc4d17 | 8410 | } |
45cfd468 | 8411 | |
f4dc4d17 DE |
8412 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
8413 | already been loaded into memory. */ | |
8414 | ||
8415 | static void | |
8416 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
8417 | enum language pretend_language) | |
8418 | { | |
8419 | struct dwarf2_cu *cu = per_cu->cu; | |
8420 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 8421 | struct compunit_symtab *cust; |
33c7c59d | 8422 | struct cleanup *delayed_list_cleanup; |
0186c6a7 DE |
8423 | struct signatured_type *sig_type; |
8424 | ||
8425 | gdb_assert (per_cu->is_debug_types); | |
8426 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8427 | |
8428 | buildsym_init (); | |
33c7c59d | 8429 | scoped_free_pendings free_pending; |
f4dc4d17 DE |
8430 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
8431 | ||
8432 | cu->list_in_scope = &file_symbols; | |
8433 | ||
8434 | cu->language = pretend_language; | |
8435 | cu->language_defn = language_def (cu->language); | |
8436 | ||
8437 | /* The symbol tables are set up in read_type_unit_scope. */ | |
8438 | process_die (cu->dies, cu); | |
8439 | ||
8440 | /* For now fudge the Go package. */ | |
8441 | if (cu->language == language_go) | |
8442 | fixup_go_packaging (cu); | |
8443 | ||
8444 | /* Now that we have processed all the DIEs in the CU, all the types | |
8445 | should be complete, and it should now be safe to compute all of the | |
8446 | physnames. */ | |
8447 | compute_delayed_physnames (cu); | |
8448 | do_cleanups (delayed_list_cleanup); | |
8449 | ||
8450 | /* TUs share symbol tables. | |
8451 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
8452 | of it with end_expandable_symtab. Otherwise, complete the addition of |
8453 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 8454 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 8455 | { |
43f3e411 DE |
8456 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
8457 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 8458 | |
43f3e411 | 8459 | if (cust != NULL) |
f4dc4d17 DE |
8460 | { |
8461 | /* Set symtab language to language from DW_AT_language. If the | |
8462 | compilation is from a C file generated by language preprocessors, | |
8463 | do not set the language if it was already deduced by | |
8464 | start_subfile. */ | |
43f3e411 DE |
8465 | if (!(cu->language == language_c |
8466 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
8467 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
8468 | } |
8469 | } | |
8470 | else | |
8471 | { | |
0ab9ce85 | 8472 | augment_type_symtab (); |
43f3e411 | 8473 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
8474 | } |
8475 | ||
8476 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8477 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
8478 | else |
8479 | { | |
8480 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8481 | pst->compunit_symtab = cust; |
f4dc4d17 | 8482 | pst->readin = 1; |
45cfd468 | 8483 | } |
c906108c SS |
8484 | } |
8485 | ||
95554aad TT |
8486 | /* Process an imported unit DIE. */ |
8487 | ||
8488 | static void | |
8489 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8490 | { | |
8491 | struct attribute *attr; | |
8492 | ||
f4dc4d17 DE |
8493 | /* For now we don't handle imported units in type units. */ |
8494 | if (cu->per_cu->is_debug_types) | |
8495 | { | |
8496 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8497 | " supported in type units [in module %s]"), | |
4262abfb | 8498 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8499 | } |
8500 | ||
95554aad TT |
8501 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8502 | if (attr != NULL) | |
8503 | { | |
9c541725 PA |
8504 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
8505 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
8506 | dwarf2_per_cu_data *per_cu | |
8507 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 8508 | |
69d751e3 | 8509 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8510 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8511 | load_full_comp_unit (per_cu, cu->language); | |
8512 | ||
796a7ff8 | 8513 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8514 | per_cu); |
8515 | } | |
8516 | } | |
8517 | ||
4c8aa72d PA |
8518 | /* RAII object that represents a process_die scope: i.e., |
8519 | starts/finishes processing a DIE. */ | |
8520 | class process_die_scope | |
adde2bff | 8521 | { |
4c8aa72d PA |
8522 | public: |
8523 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
8524 | : m_die (die), m_cu (cu) | |
8525 | { | |
8526 | /* We should only be processing DIEs not already in process. */ | |
8527 | gdb_assert (!m_die->in_process); | |
8528 | m_die->in_process = true; | |
8529 | } | |
8c3cb9fa | 8530 | |
4c8aa72d PA |
8531 | ~process_die_scope () |
8532 | { | |
8533 | m_die->in_process = false; | |
8534 | ||
8535 | /* If we're done processing the DIE for the CU that owns the line | |
8536 | header, we don't need the line header anymore. */ | |
8537 | if (m_cu->line_header_die_owner == m_die) | |
8538 | { | |
8539 | delete m_cu->line_header; | |
8540 | m_cu->line_header = NULL; | |
8541 | m_cu->line_header_die_owner = NULL; | |
8542 | } | |
8543 | } | |
8544 | ||
8545 | private: | |
8546 | die_info *m_die; | |
8547 | dwarf2_cu *m_cu; | |
8548 | }; | |
adde2bff | 8549 | |
c906108c SS |
8550 | /* Process a die and its children. */ |
8551 | ||
8552 | static void | |
e7c27a73 | 8553 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8554 | { |
4c8aa72d | 8555 | process_die_scope scope (die, cu); |
adde2bff | 8556 | |
c906108c SS |
8557 | switch (die->tag) |
8558 | { | |
8559 | case DW_TAG_padding: | |
8560 | break; | |
8561 | case DW_TAG_compile_unit: | |
95554aad | 8562 | case DW_TAG_partial_unit: |
e7c27a73 | 8563 | read_file_scope (die, cu); |
c906108c | 8564 | break; |
348e048f DE |
8565 | case DW_TAG_type_unit: |
8566 | read_type_unit_scope (die, cu); | |
8567 | break; | |
c906108c | 8568 | case DW_TAG_subprogram: |
c906108c | 8569 | case DW_TAG_inlined_subroutine: |
edb3359d | 8570 | read_func_scope (die, cu); |
c906108c SS |
8571 | break; |
8572 | case DW_TAG_lexical_block: | |
14898363 L |
8573 | case DW_TAG_try_block: |
8574 | case DW_TAG_catch_block: | |
e7c27a73 | 8575 | read_lexical_block_scope (die, cu); |
c906108c | 8576 | break; |
216f72a1 | 8577 | case DW_TAG_call_site: |
96408a79 SA |
8578 | case DW_TAG_GNU_call_site: |
8579 | read_call_site_scope (die, cu); | |
8580 | break; | |
c906108c | 8581 | case DW_TAG_class_type: |
680b30c7 | 8582 | case DW_TAG_interface_type: |
c906108c SS |
8583 | case DW_TAG_structure_type: |
8584 | case DW_TAG_union_type: | |
134d01f1 | 8585 | process_structure_scope (die, cu); |
c906108c SS |
8586 | break; |
8587 | case DW_TAG_enumeration_type: | |
134d01f1 | 8588 | process_enumeration_scope (die, cu); |
c906108c | 8589 | break; |
134d01f1 | 8590 | |
f792889a DJ |
8591 | /* These dies have a type, but processing them does not create |
8592 | a symbol or recurse to process the children. Therefore we can | |
8593 | read them on-demand through read_type_die. */ | |
c906108c | 8594 | case DW_TAG_subroutine_type: |
72019c9c | 8595 | case DW_TAG_set_type: |
c906108c | 8596 | case DW_TAG_array_type: |
c906108c | 8597 | case DW_TAG_pointer_type: |
c906108c | 8598 | case DW_TAG_ptr_to_member_type: |
c906108c | 8599 | case DW_TAG_reference_type: |
4297a3f0 | 8600 | case DW_TAG_rvalue_reference_type: |
c906108c | 8601 | case DW_TAG_string_type: |
c906108c | 8602 | break; |
134d01f1 | 8603 | |
c906108c | 8604 | case DW_TAG_base_type: |
a02abb62 | 8605 | case DW_TAG_subrange_type: |
cb249c71 | 8606 | case DW_TAG_typedef: |
134d01f1 DJ |
8607 | /* Add a typedef symbol for the type definition, if it has a |
8608 | DW_AT_name. */ | |
f792889a | 8609 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8610 | break; |
c906108c | 8611 | case DW_TAG_common_block: |
e7c27a73 | 8612 | read_common_block (die, cu); |
c906108c SS |
8613 | break; |
8614 | case DW_TAG_common_inclusion: | |
8615 | break; | |
d9fa45fe | 8616 | case DW_TAG_namespace: |
4d4ec4e5 | 8617 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8618 | read_namespace (die, cu); |
d9fa45fe | 8619 | break; |
5d7cb8df | 8620 | case DW_TAG_module: |
4d4ec4e5 | 8621 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8622 | read_module (die, cu); |
8623 | break; | |
d9fa45fe | 8624 | case DW_TAG_imported_declaration: |
74921315 KS |
8625 | cu->processing_has_namespace_info = 1; |
8626 | if (read_namespace_alias (die, cu)) | |
8627 | break; | |
8628 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8629 | case DW_TAG_imported_module: |
4d4ec4e5 | 8630 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8631 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8632 | || cu->language != language_fortran)) | |
8633 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8634 | dwarf_tag_name (die->tag)); | |
8635 | read_import_statement (die, cu); | |
d9fa45fe | 8636 | break; |
95554aad TT |
8637 | |
8638 | case DW_TAG_imported_unit: | |
8639 | process_imported_unit_die (die, cu); | |
8640 | break; | |
8641 | ||
c906108c | 8642 | default: |
e7c27a73 | 8643 | new_symbol (die, NULL, cu); |
c906108c SS |
8644 | break; |
8645 | } | |
8646 | } | |
ca69b9e6 DE |
8647 | \f |
8648 | /* DWARF name computation. */ | |
c906108c | 8649 | |
94af9270 KS |
8650 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8651 | needs to have the name of the scope prepended to the name listed in the | |
8652 | die. */ | |
8653 | ||
8654 | static int | |
8655 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8656 | { | |
1c809c68 TT |
8657 | struct attribute *attr; |
8658 | ||
94af9270 KS |
8659 | switch (die->tag) |
8660 | { | |
8661 | case DW_TAG_namespace: | |
8662 | case DW_TAG_typedef: | |
8663 | case DW_TAG_class_type: | |
8664 | case DW_TAG_interface_type: | |
8665 | case DW_TAG_structure_type: | |
8666 | case DW_TAG_union_type: | |
8667 | case DW_TAG_enumeration_type: | |
8668 | case DW_TAG_enumerator: | |
8669 | case DW_TAG_subprogram: | |
08a76f8a | 8670 | case DW_TAG_inlined_subroutine: |
94af9270 | 8671 | case DW_TAG_member: |
74921315 | 8672 | case DW_TAG_imported_declaration: |
94af9270 KS |
8673 | return 1; |
8674 | ||
8675 | case DW_TAG_variable: | |
c2b0a229 | 8676 | case DW_TAG_constant: |
94af9270 KS |
8677 | /* We only need to prefix "globally" visible variables. These include |
8678 | any variable marked with DW_AT_external or any variable that | |
8679 | lives in a namespace. [Variables in anonymous namespaces | |
8680 | require prefixing, but they are not DW_AT_external.] */ | |
8681 | ||
8682 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8683 | { | |
8684 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8685 | |
94af9270 KS |
8686 | return die_needs_namespace (die_specification (die, &spec_cu), |
8687 | spec_cu); | |
8688 | } | |
8689 | ||
1c809c68 | 8690 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8691 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8692 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8693 | return 0; |
8694 | /* A variable in a lexical block of some kind does not need a | |
8695 | namespace, even though in C++ such variables may be external | |
8696 | and have a mangled name. */ | |
8697 | if (die->parent->tag == DW_TAG_lexical_block | |
8698 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8699 | || die->parent->tag == DW_TAG_catch_block |
8700 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8701 | return 0; |
8702 | return 1; | |
94af9270 KS |
8703 | |
8704 | default: | |
8705 | return 0; | |
8706 | } | |
8707 | } | |
8708 | ||
73b9be8b KS |
8709 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
8710 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
8711 | defined for the given DIE. */ | |
8712 | ||
8713 | static struct attribute * | |
8714 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
8715 | { | |
8716 | struct attribute *attr; | |
8717 | ||
8718 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8719 | if (attr == NULL) | |
8720 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8721 | ||
8722 | return attr; | |
8723 | } | |
8724 | ||
8725 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
8726 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
8727 | defined for the given DIE. */ | |
8728 | ||
8729 | static const char * | |
8730 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
8731 | { | |
8732 | const char *linkage_name; | |
8733 | ||
8734 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
8735 | if (linkage_name == NULL) | |
8736 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8737 | ||
8738 | return linkage_name; | |
8739 | } | |
8740 | ||
94af9270 | 8741 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 8742 | compute the physname for the object, which include a method's: |
9c37b5ae | 8743 | - formal parameters (C++), |
a766d390 | 8744 | - receiver type (Go), |
a766d390 DE |
8745 | |
8746 | The term "physname" is a bit confusing. | |
8747 | For C++, for example, it is the demangled name. | |
8748 | For Go, for example, it's the mangled name. | |
94af9270 | 8749 | |
af6b7be1 JB |
8750 | For Ada, return the DIE's linkage name rather than the fully qualified |
8751 | name. PHYSNAME is ignored.. | |
8752 | ||
94af9270 KS |
8753 | The result is allocated on the objfile_obstack and canonicalized. */ |
8754 | ||
8755 | static const char * | |
15d034d0 TT |
8756 | dwarf2_compute_name (const char *name, |
8757 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8758 | int physname) |
8759 | { | |
bb5ed363 DE |
8760 | struct objfile *objfile = cu->objfile; |
8761 | ||
94af9270 KS |
8762 | if (name == NULL) |
8763 | name = dwarf2_name (die, cu); | |
8764 | ||
2ee7123e DE |
8765 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
8766 | but otherwise compute it by typename_concat inside GDB. | |
8767 | FIXME: Actually this is not really true, or at least not always true. | |
8768 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
8769 | Fortran names because there is no mangling standard. So new_symbol_full | |
8770 | will set the demangled name to the result of dwarf2_full_name, and it is | |
8771 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
8772 | if (cu->language == language_ada |
8773 | || (cu->language == language_fortran && physname)) | |
8774 | { | |
8775 | /* For Ada unit, we prefer the linkage name over the name, as | |
8776 | the former contains the exported name, which the user expects | |
8777 | to be able to reference. Ideally, we want the user to be able | |
8778 | to reference this entity using either natural or linkage name, | |
8779 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 8780 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 8781 | |
2ee7123e DE |
8782 | if (linkage_name != NULL) |
8783 | return linkage_name; | |
f55ee35c JK |
8784 | } |
8785 | ||
94af9270 KS |
8786 | /* These are the only languages we know how to qualify names in. */ |
8787 | if (name != NULL | |
9c37b5ae | 8788 | && (cu->language == language_cplus |
c44af4eb TT |
8789 | || cu->language == language_fortran || cu->language == language_d |
8790 | || cu->language == language_rust)) | |
94af9270 KS |
8791 | { |
8792 | if (die_needs_namespace (die, cu)) | |
8793 | { | |
8794 | long length; | |
0d5cff50 | 8795 | const char *prefix; |
34a68019 | 8796 | const char *canonical_name = NULL; |
94af9270 | 8797 | |
d7e74731 PA |
8798 | string_file buf; |
8799 | ||
94af9270 | 8800 | prefix = determine_prefix (die, cu); |
94af9270 KS |
8801 | if (*prefix != '\0') |
8802 | { | |
f55ee35c JK |
8803 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8804 | physname, cu); | |
9a619af0 | 8805 | |
d7e74731 | 8806 | buf.puts (prefixed_name); |
94af9270 KS |
8807 | xfree (prefixed_name); |
8808 | } | |
8809 | else | |
d7e74731 | 8810 | buf.puts (name); |
94af9270 | 8811 | |
98bfdba5 PA |
8812 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8813 | as children with DW_TAG_template_type_param or | |
8814 | DW_TAG_value_type_param. If the latter, add them to the name | |
8815 | here. If the name already has template parameters, then | |
8816 | skip this step; some versions of GCC emit both, and | |
8817 | it is more efficient to use the pre-computed name. | |
8818 | ||
8819 | Something to keep in mind about this process: it is very | |
8820 | unlikely, or in some cases downright impossible, to produce | |
8821 | something that will match the mangled name of a function. | |
8822 | If the definition of the function has the same debug info, | |
8823 | we should be able to match up with it anyway. But fallbacks | |
8824 | using the minimal symbol, for instance to find a method | |
8825 | implemented in a stripped copy of libstdc++, will not work. | |
8826 | If we do not have debug info for the definition, we will have to | |
8827 | match them up some other way. | |
8828 | ||
8829 | When we do name matching there is a related problem with function | |
8830 | templates; two instantiated function templates are allowed to | |
8831 | differ only by their return types, which we do not add here. */ | |
8832 | ||
8833 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8834 | { | |
8835 | struct attribute *attr; | |
8836 | struct die_info *child; | |
8837 | int first = 1; | |
8838 | ||
8839 | die->building_fullname = 1; | |
8840 | ||
8841 | for (child = die->child; child != NULL; child = child->sibling) | |
8842 | { | |
8843 | struct type *type; | |
12df843f | 8844 | LONGEST value; |
d521ce57 | 8845 | const gdb_byte *bytes; |
98bfdba5 PA |
8846 | struct dwarf2_locexpr_baton *baton; |
8847 | struct value *v; | |
8848 | ||
8849 | if (child->tag != DW_TAG_template_type_param | |
8850 | && child->tag != DW_TAG_template_value_param) | |
8851 | continue; | |
8852 | ||
8853 | if (first) | |
8854 | { | |
d7e74731 | 8855 | buf.puts ("<"); |
98bfdba5 PA |
8856 | first = 0; |
8857 | } | |
8858 | else | |
d7e74731 | 8859 | buf.puts (", "); |
98bfdba5 PA |
8860 | |
8861 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8862 | if (attr == NULL) | |
8863 | { | |
8864 | complaint (&symfile_complaints, | |
8865 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 8866 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
8867 | continue; |
8868 | } | |
8869 | type = die_type (child, cu); | |
8870 | ||
8871 | if (child->tag == DW_TAG_template_type_param) | |
8872 | { | |
d7e74731 | 8873 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8874 | continue; |
8875 | } | |
8876 | ||
8877 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8878 | if (attr == NULL) | |
8879 | { | |
8880 | complaint (&symfile_complaints, | |
3e43a32a MS |
8881 | _("template parameter missing " |
8882 | "DW_AT_const_value")); | |
d7e74731 | 8883 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
8884 | continue; |
8885 | } | |
8886 | ||
8887 | dwarf2_const_value_attr (attr, type, name, | |
8888 | &cu->comp_unit_obstack, cu, | |
8889 | &value, &bytes, &baton); | |
8890 | ||
8891 | if (TYPE_NOSIGN (type)) | |
8892 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8893 | changed, this can use value_print instead. */ | |
d7e74731 | 8894 | c_printchar (value, type, &buf); |
98bfdba5 PA |
8895 | else |
8896 | { | |
8897 | struct value_print_options opts; | |
8898 | ||
8899 | if (baton != NULL) | |
8900 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8901 | baton->data, | |
8902 | baton->size, | |
8903 | baton->per_cu); | |
8904 | else if (bytes != NULL) | |
8905 | { | |
8906 | v = allocate_value (type); | |
8907 | memcpy (value_contents_writeable (v), bytes, | |
8908 | TYPE_LENGTH (type)); | |
8909 | } | |
8910 | else | |
8911 | v = value_from_longest (type, value); | |
8912 | ||
3e43a32a MS |
8913 | /* Specify decimal so that we do not depend on |
8914 | the radix. */ | |
98bfdba5 PA |
8915 | get_formatted_print_options (&opts, 'd'); |
8916 | opts.raw = 1; | |
d7e74731 | 8917 | value_print (v, &buf, &opts); |
98bfdba5 PA |
8918 | release_value (v); |
8919 | value_free (v); | |
8920 | } | |
8921 | } | |
8922 | ||
8923 | die->building_fullname = 0; | |
8924 | ||
8925 | if (!first) | |
8926 | { | |
8927 | /* Close the argument list, with a space if necessary | |
8928 | (nested templates). */ | |
d7e74731 PA |
8929 | if (!buf.empty () && buf.string ().back () == '>') |
8930 | buf.puts (" >"); | |
98bfdba5 | 8931 | else |
d7e74731 | 8932 | buf.puts (">"); |
98bfdba5 PA |
8933 | } |
8934 | } | |
8935 | ||
9c37b5ae | 8936 | /* For C++ methods, append formal parameter type |
94af9270 | 8937 | information, if PHYSNAME. */ |
6e70227d | 8938 | |
94af9270 | 8939 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 8940 | && cu->language == language_cplus) |
94af9270 KS |
8941 | { |
8942 | struct type *type = read_type_die (die, cu); | |
8943 | ||
d7e74731 | 8944 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 8945 | &type_print_raw_options); |
94af9270 | 8946 | |
9c37b5ae | 8947 | if (cu->language == language_cplus) |
94af9270 | 8948 | { |
60430eff DJ |
8949 | /* Assume that an artificial first parameter is |
8950 | "this", but do not crash if it is not. RealView | |
8951 | marks unnamed (and thus unused) parameters as | |
8952 | artificial; there is no way to differentiate | |
8953 | the two cases. */ | |
94af9270 KS |
8954 | if (TYPE_NFIELDS (type) > 0 |
8955 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8956 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8957 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8958 | 0)))) | |
d7e74731 | 8959 | buf.puts (" const"); |
94af9270 KS |
8960 | } |
8961 | } | |
8962 | ||
d7e74731 | 8963 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
8964 | |
8965 | if (cu->language == language_cplus) | |
34a68019 | 8966 | canonical_name |
322a8516 | 8967 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
8968 | &objfile->per_bfd->storage_obstack); |
8969 | ||
8970 | /* If we only computed INTERMEDIATE_NAME, or if | |
8971 | INTERMEDIATE_NAME is already canonical, then we need to | |
8972 | copy it to the appropriate obstack. */ | |
322a8516 | 8973 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
8974 | name = ((const char *) |
8975 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
8976 | intermediate_name.c_str (), |
8977 | intermediate_name.length ())); | |
34a68019 TT |
8978 | else |
8979 | name = canonical_name; | |
94af9270 KS |
8980 | } |
8981 | } | |
8982 | ||
8983 | return name; | |
8984 | } | |
8985 | ||
0114d602 DJ |
8986 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8987 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 8988 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
8989 | not have a name. NAME may either be from a previous call to |
8990 | dwarf2_name or NULL. | |
8991 | ||
9c37b5ae | 8992 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
8993 | |
8994 | static const char * | |
15d034d0 | 8995 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8996 | { |
94af9270 KS |
8997 | return dwarf2_compute_name (name, die, cu, 0); |
8998 | } | |
0114d602 | 8999 | |
94af9270 KS |
9000 | /* Construct a physname for the given DIE in CU. NAME may either be |
9001 | from a previous call to dwarf2_name or NULL. The result will be | |
9002 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9003 | name. | |
0114d602 | 9004 | |
9c37b5ae | 9005 | The output string will be canonicalized (if C++). */ |
0114d602 | 9006 | |
94af9270 | 9007 | static const char * |
15d034d0 | 9008 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9009 | { |
bb5ed363 | 9010 | struct objfile *objfile = cu->objfile; |
900e11f9 | 9011 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
9012 | int need_copy = 1; |
9013 | ||
9014 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9015 | on its own. */ | |
9016 | if (!die_needs_namespace (die, cu)) | |
9017 | return dwarf2_compute_name (name, die, cu, 1); | |
9018 | ||
73b9be8b | 9019 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9020 | |
e98c9e7c TT |
9021 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9022 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9023 | if (cu->language == language_rust && mangled != NULL | |
9024 | && strchr (mangled, '{') != NULL) | |
9025 | mangled = NULL; | |
9026 | ||
900e11f9 JK |
9027 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9028 | has computed. */ | |
791afaa2 | 9029 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 9030 | if (mangled != NULL) |
900e11f9 | 9031 | { |
900e11f9 JK |
9032 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9033 | type. It is easier for GDB users to search for such functions as | |
9034 | `name(params)' than `long name(params)'. In such case the minimal | |
9035 | symbol names do not match the full symbol names but for template | |
9036 | functions there is never a need to look up their definition from their | |
9037 | declaration so the only disadvantage remains the minimal symbol | |
9038 | variant `long name(params)' does not have the proper inferior type. | |
9039 | */ | |
9040 | ||
a766d390 DE |
9041 | if (cu->language == language_go) |
9042 | { | |
9043 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9044 | new_symbol_full assumes we return the mangled name. | |
9045 | This just undoes that lie until things are cleaned up. */ | |
a766d390 DE |
9046 | } |
9047 | else | |
9048 | { | |
791afaa2 TT |
9049 | demangled.reset (gdb_demangle (mangled, |
9050 | (DMGL_PARAMS | DMGL_ANSI | |
9051 | | DMGL_RET_DROP))); | |
a766d390 | 9052 | } |
900e11f9 | 9053 | if (demangled) |
791afaa2 | 9054 | canon = demangled.get (); |
900e11f9 JK |
9055 | else |
9056 | { | |
9057 | canon = mangled; | |
9058 | need_copy = 0; | |
9059 | } | |
9060 | } | |
9061 | ||
9062 | if (canon == NULL || check_physname) | |
9063 | { | |
9064 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9065 | ||
9066 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9067 | { | |
9068 | /* It may not mean a bug in GDB. The compiler could also | |
9069 | compute DW_AT_linkage_name incorrectly. But in such case | |
9070 | GDB would need to be bug-to-bug compatible. */ | |
9071 | ||
9072 | complaint (&symfile_complaints, | |
9073 | _("Computed physname <%s> does not match demangled <%s> " | |
9074 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9075 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9076 | objfile_name (objfile)); |
900e11f9 JK |
9077 | |
9078 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9079 | is available here - over computed PHYSNAME. It is safer | |
9080 | against both buggy GDB and buggy compilers. */ | |
9081 | ||
9082 | retval = canon; | |
9083 | } | |
9084 | else | |
9085 | { | |
9086 | retval = physname; | |
9087 | need_copy = 0; | |
9088 | } | |
9089 | } | |
9090 | else | |
9091 | retval = canon; | |
9092 | ||
9093 | if (need_copy) | |
224c3ddb SM |
9094 | retval = ((const char *) |
9095 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9096 | retval, strlen (retval))); | |
900e11f9 | 9097 | |
900e11f9 | 9098 | return retval; |
0114d602 DJ |
9099 | } |
9100 | ||
74921315 KS |
9101 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9102 | a new symbol for it. | |
9103 | ||
9104 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9105 | ||
9106 | static int | |
9107 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9108 | { | |
9109 | struct attribute *attr; | |
9110 | ||
9111 | /* If the die does not have a name, this is not a namespace | |
9112 | alias. */ | |
9113 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9114 | if (attr != NULL) | |
9115 | { | |
9116 | int num; | |
9117 | struct die_info *d = die; | |
9118 | struct dwarf2_cu *imported_cu = cu; | |
9119 | ||
9120 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9121 | keep inspecting DIEs until we hit the underlying import. */ | |
9122 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9123 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9124 | { | |
9125 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
9126 | if (attr == NULL) | |
9127 | break; | |
9128 | ||
9129 | d = follow_die_ref (d, attr, &imported_cu); | |
9130 | if (d->tag != DW_TAG_imported_declaration) | |
9131 | break; | |
9132 | } | |
9133 | ||
9134 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
9135 | { | |
9136 | complaint (&symfile_complaints, | |
9137 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 9138 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
9139 | return 0; |
9140 | } | |
9141 | ||
9142 | if (attr != NULL) | |
9143 | { | |
9144 | struct type *type; | |
9c541725 | 9145 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 9146 | |
9c541725 | 9147 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
9148 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
9149 | { | |
9150 | /* This declaration is a global namespace alias. Add | |
9151 | a symbol for it whose type is the aliased namespace. */ | |
9152 | new_symbol (die, type, cu); | |
9153 | return 1; | |
9154 | } | |
9155 | } | |
9156 | } | |
9157 | ||
9158 | return 0; | |
9159 | } | |
9160 | ||
22cee43f PMR |
9161 | /* Return the using directives repository (global or local?) to use in the |
9162 | current context for LANGUAGE. | |
9163 | ||
9164 | For Ada, imported declarations can materialize renamings, which *may* be | |
9165 | global. However it is impossible (for now?) in DWARF to distinguish | |
9166 | "external" imported declarations and "static" ones. As all imported | |
9167 | declarations seem to be static in all other languages, make them all CU-wide | |
9168 | global only in Ada. */ | |
9169 | ||
9170 | static struct using_direct ** | |
9171 | using_directives (enum language language) | |
9172 | { | |
9173 | if (language == language_ada && context_stack_depth == 0) | |
9174 | return &global_using_directives; | |
9175 | else | |
9176 | return &local_using_directives; | |
9177 | } | |
9178 | ||
27aa8d6a SW |
9179 | /* Read the import statement specified by the given die and record it. */ |
9180 | ||
9181 | static void | |
9182 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
9183 | { | |
bb5ed363 | 9184 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 9185 | struct attribute *import_attr; |
32019081 | 9186 | struct die_info *imported_die, *child_die; |
de4affc9 | 9187 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 9188 | const char *imported_name; |
794684b6 | 9189 | const char *imported_name_prefix; |
13387711 SW |
9190 | const char *canonical_name; |
9191 | const char *import_alias; | |
9192 | const char *imported_declaration = NULL; | |
794684b6 | 9193 | const char *import_prefix; |
eb1e02fd | 9194 | std::vector<const char *> excludes; |
13387711 | 9195 | |
27aa8d6a SW |
9196 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
9197 | if (import_attr == NULL) | |
9198 | { | |
9199 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9200 | dwarf_tag_name (die->tag)); | |
9201 | return; | |
9202 | } | |
9203 | ||
de4affc9 CC |
9204 | imported_cu = cu; |
9205 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
9206 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
9207 | if (imported_name == NULL) |
9208 | { | |
9209 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
9210 | ||
9211 | The import in the following code: | |
9212 | namespace A | |
9213 | { | |
9214 | typedef int B; | |
9215 | } | |
9216 | ||
9217 | int main () | |
9218 | { | |
9219 | using A::B; | |
9220 | B b; | |
9221 | return b; | |
9222 | } | |
9223 | ||
9224 | ... | |
9225 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
9226 | <52> DW_AT_decl_file : 1 | |
9227 | <53> DW_AT_decl_line : 6 | |
9228 | <54> DW_AT_import : <0x75> | |
9229 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
9230 | <59> DW_AT_name : B | |
9231 | <5b> DW_AT_decl_file : 1 | |
9232 | <5c> DW_AT_decl_line : 2 | |
9233 | <5d> DW_AT_type : <0x6e> | |
9234 | ... | |
9235 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
9236 | <76> DW_AT_byte_size : 4 | |
9237 | <77> DW_AT_encoding : 5 (signed) | |
9238 | ||
9239 | imports the wrong die ( 0x75 instead of 0x58 ). | |
9240 | This case will be ignored until the gcc bug is fixed. */ | |
9241 | return; | |
9242 | } | |
9243 | ||
82856980 SW |
9244 | /* Figure out the local name after import. */ |
9245 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 9246 | |
794684b6 SW |
9247 | /* Figure out where the statement is being imported to. */ |
9248 | import_prefix = determine_prefix (die, cu); | |
9249 | ||
9250 | /* Figure out what the scope of the imported die is and prepend it | |
9251 | to the name of the imported die. */ | |
de4affc9 | 9252 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 9253 | |
f55ee35c JK |
9254 | if (imported_die->tag != DW_TAG_namespace |
9255 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 9256 | { |
13387711 SW |
9257 | imported_declaration = imported_name; |
9258 | canonical_name = imported_name_prefix; | |
794684b6 | 9259 | } |
13387711 | 9260 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 9261 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
9262 | imported_name_prefix, |
9263 | (cu->language == language_d ? "." : "::"), | |
9264 | imported_name, (char *) NULL); | |
13387711 SW |
9265 | else |
9266 | canonical_name = imported_name; | |
794684b6 | 9267 | |
32019081 JK |
9268 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
9269 | for (child_die = die->child; child_die && child_die->tag; | |
9270 | child_die = sibling_die (child_die)) | |
9271 | { | |
9272 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
9273 | represented by an imported module entry with an import attribute | |
9274 | referring to the module and owned entries corresponding to those | |
9275 | entities that are renamed as part of being imported. */ | |
9276 | ||
9277 | if (child_die->tag != DW_TAG_imported_declaration) | |
9278 | { | |
9279 | complaint (&symfile_complaints, | |
9280 | _("child DW_TAG_imported_declaration expected " | |
9281 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 9282 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9283 | continue; |
9284 | } | |
9285 | ||
9286 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
9287 | if (import_attr == NULL) | |
9288 | { | |
9289 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9290 | dwarf_tag_name (child_die->tag)); | |
9291 | continue; | |
9292 | } | |
9293 | ||
9294 | imported_cu = cu; | |
9295 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9296 | &imported_cu); | |
9297 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9298 | if (imported_name == NULL) | |
9299 | { | |
9300 | complaint (&symfile_complaints, | |
9301 | _("child DW_TAG_imported_declaration has unknown " | |
9302 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 9303 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9304 | continue; |
9305 | } | |
9306 | ||
eb1e02fd | 9307 | excludes.push_back (imported_name); |
32019081 JK |
9308 | |
9309 | process_die (child_die, cu); | |
9310 | } | |
9311 | ||
22cee43f PMR |
9312 | add_using_directive (using_directives (cu->language), |
9313 | import_prefix, | |
9314 | canonical_name, | |
9315 | import_alias, | |
9316 | imported_declaration, | |
9317 | excludes, | |
9318 | 0, | |
9319 | &objfile->objfile_obstack); | |
27aa8d6a SW |
9320 | } |
9321 | ||
5230b05a WT |
9322 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
9323 | types, but gives them a size of zero. Starting with version 14, | |
9324 | ICC is compatible with GCC. */ | |
9325 | ||
9326 | static int | |
9327 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
9328 | { | |
9329 | if (!cu->checked_producer) | |
9330 | check_producer (cu); | |
9331 | ||
9332 | return cu->producer_is_icc_lt_14; | |
9333 | } | |
9334 | ||
1b80a9fa JK |
9335 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9336 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9337 | this, it was first present in GCC release 4.3.0. */ | |
9338 | ||
9339 | static int | |
9340 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9341 | { | |
9342 | if (!cu->checked_producer) | |
9343 | check_producer (cu); | |
9344 | ||
9345 | return cu->producer_is_gcc_lt_4_3; | |
9346 | } | |
9347 | ||
d721ba37 PA |
9348 | static file_and_directory |
9349 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 9350 | { |
d721ba37 PA |
9351 | file_and_directory res; |
9352 | ||
9291a0cd TT |
9353 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9354 | is not a source language identifier. */ | |
d721ba37 PA |
9355 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
9356 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9357 | |
d721ba37 PA |
9358 | if (res.comp_dir == NULL |
9359 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
9360 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 9361 | { |
d721ba37 PA |
9362 | res.comp_dir_storage = ldirname (res.name); |
9363 | if (!res.comp_dir_storage.empty ()) | |
9364 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 9365 | } |
d721ba37 | 9366 | if (res.comp_dir != NULL) |
9291a0cd TT |
9367 | { |
9368 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9369 | directory, get rid of it. */ | |
d721ba37 | 9370 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 9371 | |
d721ba37 PA |
9372 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
9373 | res.comp_dir = cp + 1; | |
9291a0cd TT |
9374 | } |
9375 | ||
d721ba37 PA |
9376 | if (res.name == NULL) |
9377 | res.name = "<unknown>"; | |
9378 | ||
9379 | return res; | |
9291a0cd TT |
9380 | } |
9381 | ||
f4dc4d17 DE |
9382 | /* Handle DW_AT_stmt_list for a compilation unit. |
9383 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9384 | COMP_DIR is the compilation directory. LOWPC is passed to |
9385 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9386 | |
9387 | static void | |
9388 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9389 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9390 | { |
527f3840 | 9391 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9392 | struct attribute *attr; |
527f3840 JK |
9393 | struct line_header line_header_local; |
9394 | hashval_t line_header_local_hash; | |
9395 | unsigned u; | |
9396 | void **slot; | |
9397 | int decode_mapping; | |
2ab95328 | 9398 | |
f4dc4d17 DE |
9399 | gdb_assert (! cu->per_cu->is_debug_types); |
9400 | ||
2ab95328 | 9401 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9402 | if (attr == NULL) |
9403 | return; | |
9404 | ||
9c541725 | 9405 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
9406 | |
9407 | /* The line header hash table is only created if needed (it exists to | |
9408 | prevent redundant reading of the line table for partial_units). | |
9409 | If we're given a partial_unit, we'll need it. If we're given a | |
9410 | compile_unit, then use the line header hash table if it's already | |
9411 | created, but don't create one just yet. */ | |
9412 | ||
9413 | if (dwarf2_per_objfile->line_header_hash == NULL | |
9414 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 9415 | { |
527f3840 JK |
9416 | dwarf2_per_objfile->line_header_hash |
9417 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
9418 | line_header_eq_voidp, | |
9419 | free_line_header_voidp, | |
9420 | &objfile->objfile_obstack, | |
9421 | hashtab_obstack_allocate, | |
9422 | dummy_obstack_deallocate); | |
9423 | } | |
2ab95328 | 9424 | |
9c541725 | 9425 | line_header_local.sect_off = line_offset; |
527f3840 JK |
9426 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
9427 | line_header_local_hash = line_header_hash (&line_header_local); | |
9428 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
9429 | { | |
9430 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9431 | &line_header_local, | |
9432 | line_header_local_hash, NO_INSERT); | |
9433 | ||
9434 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
9435 | is not present in *SLOT (since if there is something in *SLOT then | |
9436 | it will be for a partial_unit). */ | |
9437 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 9438 | { |
527f3840 | 9439 | gdb_assert (*slot != NULL); |
9a3c8263 | 9440 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 9441 | return; |
dee91e82 | 9442 | } |
2ab95328 | 9443 | } |
527f3840 JK |
9444 | |
9445 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
9446 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
9447 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
9448 | if (lh == NULL) | |
527f3840 | 9449 | return; |
4c8aa72d PA |
9450 | |
9451 | cu->line_header = lh.release (); | |
9452 | cu->line_header_die_owner = die; | |
527f3840 JK |
9453 | |
9454 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
9455 | slot = NULL; | |
9456 | else | |
9457 | { | |
9458 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9459 | &line_header_local, | |
9460 | line_header_local_hash, INSERT); | |
9461 | gdb_assert (slot != NULL); | |
9462 | } | |
9463 | if (slot != NULL && *slot == NULL) | |
9464 | { | |
9465 | /* This newly decoded line number information unit will be owned | |
9466 | by line_header_hash hash table. */ | |
9467 | *slot = cu->line_header; | |
4c8aa72d | 9468 | cu->line_header_die_owner = NULL; |
527f3840 JK |
9469 | } |
9470 | else | |
9471 | { | |
9472 | /* We cannot free any current entry in (*slot) as that struct line_header | |
9473 | may be already used by multiple CUs. Create only temporary decoded | |
9474 | line_header for this CU - it may happen at most once for each line | |
9475 | number information unit. And if we're not using line_header_hash | |
9476 | then this is what we want as well. */ | |
9477 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
9478 | } |
9479 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
9480 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
9481 | decode_mapping); | |
fff8551c | 9482 | |
2ab95328 TT |
9483 | } |
9484 | ||
95554aad | 9485 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 9486 | |
c906108c | 9487 | static void |
e7c27a73 | 9488 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9489 | { |
dee91e82 | 9490 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 9491 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 9492 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
9493 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
9494 | struct attribute *attr; | |
c906108c | 9495 | struct die_info *child_die; |
e142c38c | 9496 | CORE_ADDR baseaddr; |
6e70227d | 9497 | |
e142c38c | 9498 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 9499 | |
fae299cd | 9500 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
9501 | |
9502 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
9503 | from finish_block. */ | |
2acceee2 | 9504 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 9505 | lowpc = highpc; |
3e29f34a | 9506 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 9507 | |
d721ba37 | 9508 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 9509 | |
95554aad | 9510 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 9511 | |
f4b8a18d KW |
9512 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
9513 | standardised yet. As a workaround for the language detection we fall | |
9514 | back to the DW_AT_producer string. */ | |
9515 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
9516 | cu->language = language_opencl; | |
9517 | ||
3019eac3 DE |
9518 | /* Similar hack for Go. */ |
9519 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
9520 | set_cu_language (DW_LANG_Go, cu); | |
9521 | ||
d721ba37 | 9522 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
9523 | |
9524 | /* Decode line number information if present. We do this before | |
9525 | processing child DIEs, so that the line header table is available | |
9526 | for DW_AT_decl_file. */ | |
d721ba37 | 9527 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
9528 | |
9529 | /* Process all dies in compilation unit. */ | |
9530 | if (die->child != NULL) | |
9531 | { | |
9532 | child_die = die->child; | |
9533 | while (child_die && child_die->tag) | |
9534 | { | |
9535 | process_die (child_die, cu); | |
9536 | child_die = sibling_die (child_die); | |
9537 | } | |
9538 | } | |
9539 | ||
9540 | /* Decode macro information, if present. Dwarf 2 macro information | |
9541 | refers to information in the line number info statement program | |
9542 | header, so we can only read it if we've read the header | |
9543 | successfully. */ | |
0af92d60 JK |
9544 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
9545 | if (attr == NULL) | |
9546 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
9547 | if (attr && cu->line_header) |
9548 | { | |
9549 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
9550 | complaint (&symfile_complaints, | |
0af92d60 | 9551 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 9552 | |
43f3e411 | 9553 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
9554 | } |
9555 | else | |
9556 | { | |
9557 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
9558 | if (attr && cu->line_header) | |
9559 | { | |
9560 | unsigned int macro_offset = DW_UNSND (attr); | |
9561 | ||
43f3e411 | 9562 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
9563 | } |
9564 | } | |
3019eac3 DE |
9565 | } |
9566 | ||
f4dc4d17 DE |
9567 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
9568 | Create the set of symtabs used by this TU, or if this TU is sharing | |
9569 | symtabs with another TU and the symtabs have already been created | |
9570 | then restore those symtabs in the line header. | |
9571 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
9572 | |
9573 | static void | |
f4dc4d17 | 9574 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 9575 | { |
f4dc4d17 DE |
9576 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
9577 | struct type_unit_group *tu_group; | |
9578 | int first_time; | |
3019eac3 | 9579 | struct attribute *attr; |
9c541725 | 9580 | unsigned int i; |
0186c6a7 | 9581 | struct signatured_type *sig_type; |
3019eac3 | 9582 | |
f4dc4d17 | 9583 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9584 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9585 | |
f4dc4d17 | 9586 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9587 | |
f4dc4d17 | 9588 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9589 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9590 | if (sig_type->type_unit_group == NULL) |
9591 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9592 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9593 | |
9594 | /* If we've already processed this stmt_list there's no real need to | |
9595 | do it again, we could fake it and just recreate the part we need | |
9596 | (file name,index -> symtab mapping). If data shows this optimization | |
9597 | is useful we can do it then. */ | |
43f3e411 | 9598 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
9599 | |
9600 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9601 | debug info. */ | |
fff8551c | 9602 | line_header_up lh; |
f4dc4d17 | 9603 | if (attr != NULL) |
3019eac3 | 9604 | { |
9c541725 | 9605 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
9606 | lh = dwarf_decode_line_header (line_offset, cu); |
9607 | } | |
9608 | if (lh == NULL) | |
9609 | { | |
9610 | if (first_time) | |
9611 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9612 | else | |
9613 | { | |
9614 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 9615 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9616 | } |
f4dc4d17 | 9617 | return; |
3019eac3 DE |
9618 | } |
9619 | ||
4c8aa72d PA |
9620 | cu->line_header = lh.release (); |
9621 | cu->line_header_die_owner = die; | |
3019eac3 | 9622 | |
f4dc4d17 DE |
9623 | if (first_time) |
9624 | { | |
43f3e411 | 9625 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 9626 | |
1fd60fc0 DE |
9627 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
9628 | still initializing it, and our caller (a few levels up) | |
9629 | process_full_type_unit still needs to know if this is the first | |
9630 | time. */ | |
9631 | ||
4c8aa72d PA |
9632 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
9633 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
9634 | cu->line_header->file_names.size ()); | |
3019eac3 | 9635 | |
4c8aa72d | 9636 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 9637 | { |
4c8aa72d | 9638 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 9639 | |
4c8aa72d | 9640 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 9641 | |
f4dc4d17 DE |
9642 | if (current_subfile->symtab == NULL) |
9643 | { | |
4c8aa72d PA |
9644 | /* NOTE: start_subfile will recognize when it's been |
9645 | passed a file it has already seen. So we can't | |
9646 | assume there's a simple mapping from | |
9647 | cu->line_header->file_names to subfiles, plus | |
9648 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
9649 | current_subfile->symtab |
9650 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
9651 | } |
9652 | ||
8c43009f PA |
9653 | fe.symtab = current_subfile->symtab; |
9654 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
9655 | } |
9656 | } | |
9657 | else | |
3019eac3 | 9658 | { |
0ab9ce85 | 9659 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9660 | |
4c8aa72d | 9661 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 9662 | { |
4c8aa72d | 9663 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 9664 | |
4c8aa72d | 9665 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 9666 | } |
3019eac3 DE |
9667 | } |
9668 | ||
f4dc4d17 DE |
9669 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9670 | so they don't have a "real" (so to speak) symtab anyway. | |
9671 | There is later code that will assign the main symtab to all symbols | |
9672 | that don't have one. We need to handle the case of a symbol with a | |
9673 | missing symtab (DW_AT_decl_file) anyway. */ | |
9674 | } | |
3019eac3 | 9675 | |
f4dc4d17 DE |
9676 | /* Process DW_TAG_type_unit. |
9677 | For TUs we want to skip the first top level sibling if it's not the | |
9678 | actual type being defined by this TU. In this case the first top | |
9679 | level sibling is there to provide context only. */ | |
3019eac3 | 9680 | |
f4dc4d17 DE |
9681 | static void |
9682 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9683 | { | |
9684 | struct die_info *child_die; | |
3019eac3 | 9685 | |
f4dc4d17 DE |
9686 | prepare_one_comp_unit (cu, die, language_minimal); |
9687 | ||
9688 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9689 | We do this before processing child DIEs, so that the line header table | |
9690 | is available for DW_AT_decl_file. */ | |
9691 | setup_type_unit_groups (die, cu); | |
9692 | ||
9693 | if (die->child != NULL) | |
9694 | { | |
9695 | child_die = die->child; | |
9696 | while (child_die && child_die->tag) | |
9697 | { | |
9698 | process_die (child_die, cu); | |
9699 | child_die = sibling_die (child_die); | |
9700 | } | |
9701 | } | |
3019eac3 DE |
9702 | } |
9703 | \f | |
80626a55 DE |
9704 | /* DWO/DWP files. |
9705 | ||
9706 | http://gcc.gnu.org/wiki/DebugFission | |
9707 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9708 | ||
9709 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9710 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9711 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9712 | |
9713 | static hashval_t | |
9714 | hash_dwo_file (const void *item) | |
9715 | { | |
9a3c8263 | 9716 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 9717 | hashval_t hash; |
3019eac3 | 9718 | |
a2ce51a0 DE |
9719 | hash = htab_hash_string (dwo_file->dwo_name); |
9720 | if (dwo_file->comp_dir != NULL) | |
9721 | hash += htab_hash_string (dwo_file->comp_dir); | |
9722 | return hash; | |
3019eac3 DE |
9723 | } |
9724 | ||
9725 | static int | |
9726 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9727 | { | |
9a3c8263 SM |
9728 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
9729 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 9730 | |
a2ce51a0 DE |
9731 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9732 | return 0; | |
9733 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9734 | return lhs->comp_dir == rhs->comp_dir; | |
9735 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9736 | } |
9737 | ||
9738 | /* Allocate a hash table for DWO files. */ | |
9739 | ||
9740 | static htab_t | |
9741 | allocate_dwo_file_hash_table (void) | |
9742 | { | |
9743 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9744 | ||
9745 | return htab_create_alloc_ex (41, | |
9746 | hash_dwo_file, | |
9747 | eq_dwo_file, | |
9748 | NULL, | |
9749 | &objfile->objfile_obstack, | |
9750 | hashtab_obstack_allocate, | |
9751 | dummy_obstack_deallocate); | |
9752 | } | |
9753 | ||
80626a55 DE |
9754 | /* Lookup DWO file DWO_NAME. */ |
9755 | ||
9756 | static void ** | |
0ac5b59e | 9757 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9758 | { |
9759 | struct dwo_file find_entry; | |
9760 | void **slot; | |
9761 | ||
9762 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9763 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9764 | ||
9765 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9766 | find_entry.dwo_name = dwo_name; |
9767 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9768 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9769 | ||
9770 | return slot; | |
9771 | } | |
9772 | ||
3019eac3 DE |
9773 | static hashval_t |
9774 | hash_dwo_unit (const void *item) | |
9775 | { | |
9a3c8263 | 9776 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
9777 | |
9778 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9779 | return dwo_unit->signature; | |
9780 | } | |
9781 | ||
9782 | static int | |
9783 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9784 | { | |
9a3c8263 SM |
9785 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
9786 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
9787 | |
9788 | /* The signature is assumed to be unique within the DWO file. | |
9789 | So while object file CU dwo_id's always have the value zero, | |
9790 | that's OK, assuming each object file DWO file has only one CU, | |
9791 | and that's the rule for now. */ | |
9792 | return lhs->signature == rhs->signature; | |
9793 | } | |
9794 | ||
9795 | /* Allocate a hash table for DWO CUs,TUs. | |
9796 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9797 | ||
9798 | static htab_t | |
9799 | allocate_dwo_unit_table (struct objfile *objfile) | |
9800 | { | |
9801 | /* Start out with a pretty small number. | |
9802 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9803 | return htab_create_alloc_ex (3, | |
9804 | hash_dwo_unit, | |
9805 | eq_dwo_unit, | |
9806 | NULL, | |
9807 | &objfile->objfile_obstack, | |
9808 | hashtab_obstack_allocate, | |
9809 | dummy_obstack_deallocate); | |
9810 | } | |
9811 | ||
80626a55 | 9812 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9813 | |
19c3d4c9 | 9814 | struct create_dwo_cu_data |
3019eac3 DE |
9815 | { |
9816 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9817 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9818 | }; |
9819 | ||
19c3d4c9 | 9820 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9821 | |
9822 | static void | |
19c3d4c9 DE |
9823 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9824 | const gdb_byte *info_ptr, | |
9825 | struct die_info *comp_unit_die, | |
9826 | int has_children, | |
9827 | void *datap) | |
3019eac3 DE |
9828 | { |
9829 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 9830 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 9831 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 9832 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 9833 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9834 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9835 | struct attribute *attr; |
3019eac3 DE |
9836 | |
9837 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9838 | if (attr == NULL) | |
9839 | { | |
19c3d4c9 DE |
9840 | complaint (&symfile_complaints, |
9841 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9842 | " its dwo_id [in module %s]"), | |
9c541725 | 9843 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
9844 | return; |
9845 | } | |
9846 | ||
3019eac3 DE |
9847 | dwo_unit->dwo_file = dwo_file; |
9848 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9849 | dwo_unit->section = section; |
9c541725 | 9850 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
9851 | dwo_unit->length = cu->per_cu->length; |
9852 | ||
b4f54984 | 9853 | if (dwarf_read_debug) |
4031ecc5 | 9854 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
9855 | to_underlying (sect_off), |
9856 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9857 | } |
9858 | ||
33c5cd75 | 9859 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 9860 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 9861 | |
33c5cd75 DB |
9862 | static void |
9863 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
9864 | htab_t &cus_htab) | |
3019eac3 DE |
9865 | { |
9866 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
33c5cd75 | 9867 | const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev; |
d521ce57 | 9868 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 9869 | |
33c5cd75 DB |
9870 | dwarf2_read_section (objfile, §ion); |
9871 | info_ptr = section.buffer; | |
3019eac3 DE |
9872 | |
9873 | if (info_ptr == NULL) | |
33c5cd75 | 9874 | return; |
3019eac3 | 9875 | |
b4f54984 | 9876 | if (dwarf_read_debug) |
19c3d4c9 DE |
9877 | { |
9878 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
9879 | get_section_name (§ion), |
9880 | get_section_file_name (§ion)); | |
19c3d4c9 | 9881 | } |
3019eac3 | 9882 | |
33c5cd75 | 9883 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
9884 | while (info_ptr < end_ptr) |
9885 | { | |
9886 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
9887 | struct create_dwo_cu_data create_dwo_cu_data; |
9888 | struct dwo_unit *dwo_unit; | |
9889 | void **slot; | |
9890 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 9891 | |
19c3d4c9 DE |
9892 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9893 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9894 | memset (&per_cu, 0, sizeof (per_cu)); |
9895 | per_cu.objfile = objfile; | |
9896 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
9897 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
9898 | per_cu.section = §ion; | |
c5ed0576 | 9899 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
9900 | |
9901 | init_cutu_and_read_dies_no_follow ( | |
9902 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
9903 | info_ptr += per_cu.length; | |
9904 | ||
9905 | // If the unit could not be parsed, skip it. | |
9906 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
9907 | continue; | |
3019eac3 | 9908 | |
33c5cd75 DB |
9909 | if (cus_htab == NULL) |
9910 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 9911 | |
33c5cd75 DB |
9912 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
9913 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9914 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
9915 | gdb_assert (slot != NULL); | |
9916 | if (*slot != NULL) | |
19c3d4c9 | 9917 | { |
33c5cd75 DB |
9918 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
9919 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 9920 | |
33c5cd75 DB |
9921 | complaint (&symfile_complaints, |
9922 | _("debug cu entry at offset 0x%x is duplicate to" | |
9923 | " the entry at offset 0x%x, signature %s"), | |
9924 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
9925 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 9926 | } |
33c5cd75 | 9927 | *slot = (void *)dwo_unit; |
3019eac3 | 9928 | } |
3019eac3 DE |
9929 | } |
9930 | ||
80626a55 DE |
9931 | /* DWP file .debug_{cu,tu}_index section format: |
9932 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9933 | ||
d2415c6c DE |
9934 | DWP Version 1: |
9935 | ||
80626a55 DE |
9936 | Both index sections have the same format, and serve to map a 64-bit |
9937 | signature to a set of section numbers. Each section begins with a header, | |
9938 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9939 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9940 | aligned at 8-byte boundaries in the file. | |
9941 | ||
d2415c6c DE |
9942 | The index section header consists of: |
9943 | ||
9944 | V, 32 bit version number | |
9945 | -, 32 bits unused | |
9946 | N, 32 bit number of compilation units or type units in the index | |
9947 | M, 32 bit number of slots in the hash table | |
80626a55 | 9948 | |
d2415c6c | 9949 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9950 | |
d2415c6c DE |
9951 | The hash table begins at offset 16 in the section, and consists of an array |
9952 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9953 | order of the application binary). Unused slots in the hash table are 0. | |
9954 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9955 | |
d2415c6c DE |
9956 | The parallel table begins immediately after the hash table |
9957 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9958 | array of 32-bit indexes (using the byte order of the application binary), | |
9959 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9960 | table contains a 32-bit index into the pool of section numbers. For unused | |
9961 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9962 | |
73869dc2 DE |
9963 | The pool of section numbers begins immediately following the hash table |
9964 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9965 | section numbers consists of an array of 32-bit words (using the byte order | |
9966 | of the application binary). Each item in the array is indexed starting | |
9967 | from 0. The hash table entry provides the index of the first section | |
9968 | number in the set. Additional section numbers in the set follow, and the | |
9969 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9970 | ||
9971 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
9972 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9973 | be the second entry. Other members of the set may follow in any order. | |
9974 | ||
9975 | --- | |
9976 | ||
9977 | DWP Version 2: | |
9978 | ||
9979 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
9980 | and the entries in the index tables are now offsets into these sections. | |
9981 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
9982 | section. | |
9983 | ||
9984 | Index Section Contents: | |
9985 | Header | |
9986 | Hash Table of Signatures dwp_hash_table.hash_table | |
9987 | Parallel Table of Indices dwp_hash_table.unit_table | |
9988 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
9989 | Table of Section Sizes dwp_hash_table.v2.sizes | |
9990 | ||
9991 | The index section header consists of: | |
9992 | ||
9993 | V, 32 bit version number | |
9994 | L, 32 bit number of columns in the table of section offsets | |
9995 | N, 32 bit number of compilation units or type units in the index | |
9996 | M, 32 bit number of slots in the hash table | |
9997 | ||
9998 | Numbers are recorded using the byte order of the application binary. | |
9999 | ||
10000 | The hash table has the same format as version 1. | |
10001 | The parallel table of indices has the same format as version 1, | |
10002 | except that the entries are origin-1 indices into the table of sections | |
10003 | offsets and the table of section sizes. | |
10004 | ||
10005 | The table of offsets begins immediately following the parallel table | |
10006 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10007 | a two-dimensional array of 32-bit words (using the byte order of the | |
10008 | application binary), with L columns and N+1 rows, in row-major order. | |
10009 | Each row in the array is indexed starting from 0. The first row provides | |
10010 | a key to the remaining rows: each column in this row provides an identifier | |
10011 | for a debug section, and the offsets in the same column of subsequent rows | |
10012 | refer to that section. The section identifiers are: | |
10013 | ||
10014 | DW_SECT_INFO 1 .debug_info.dwo | |
10015 | DW_SECT_TYPES 2 .debug_types.dwo | |
10016 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10017 | DW_SECT_LINE 4 .debug_line.dwo | |
10018 | DW_SECT_LOC 5 .debug_loc.dwo | |
10019 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10020 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10021 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10022 | ||
10023 | The offsets provided by the CU and TU index sections are the base offsets | |
10024 | for the contributions made by each CU or TU to the corresponding section | |
10025 | in the package file. Each CU and TU header contains an abbrev_offset | |
10026 | field, used to find the abbreviations table for that CU or TU within the | |
10027 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10028 | be interpreted as relative to the base offset given in the index section. | |
10029 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10030 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10031 | and offsets into other debug sections obtained from DWARF attributes should | |
10032 | also be interpreted as relative to the corresponding base offset. | |
10033 | ||
10034 | The table of sizes begins immediately following the table of offsets. | |
10035 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10036 | with L columns and N rows, in row-major order. Each row in the array is | |
10037 | indexed starting from 1 (row 0 is shared by the two tables). | |
10038 | ||
10039 | --- | |
10040 | ||
10041 | Hash table lookup is handled the same in version 1 and 2: | |
10042 | ||
10043 | We assume that N and M will not exceed 2^32 - 1. | |
10044 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10045 | ||
d2415c6c DE |
10046 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10047 | in the hash table is located as follows: | |
80626a55 | 10048 | |
d2415c6c DE |
10049 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10050 | the low-order k bits all set to 1. | |
80626a55 | 10051 | |
d2415c6c | 10052 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10053 | |
d2415c6c DE |
10054 | 3) If the hash table entry at index H matches the signature, use that |
10055 | entry. If the hash table entry at index H is unused (all zeroes), | |
10056 | terminate the search: the signature is not present in the table. | |
80626a55 | 10057 | |
d2415c6c | 10058 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10059 | |
d2415c6c | 10060 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10061 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10062 | |
10063 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10064 | .debug_{info,types}.dwo in DWP_FILE. | |
10065 | Returns NULL if there isn't one. | |
10066 | Note: This function processes DWP files only, not DWO files. */ | |
10067 | ||
10068 | static struct dwp_hash_table * | |
10069 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10070 | { | |
10071 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10072 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10073 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10074 | struct dwarf2_section_info *index; |
73869dc2 | 10075 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10076 | struct dwp_hash_table *htab; |
10077 | ||
10078 | if (is_debug_types) | |
10079 | index = &dwp_file->sections.tu_index; | |
10080 | else | |
10081 | index = &dwp_file->sections.cu_index; | |
10082 | ||
10083 | if (dwarf2_section_empty_p (index)) | |
10084 | return NULL; | |
10085 | dwarf2_read_section (objfile, index); | |
10086 | ||
10087 | index_ptr = index->buffer; | |
10088 | index_end = index_ptr + index->size; | |
10089 | ||
10090 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10091 | index_ptr += 4; |
10092 | if (version == 2) | |
10093 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10094 | else | |
10095 | nr_columns = 0; | |
10096 | index_ptr += 4; | |
80626a55 DE |
10097 | nr_units = read_4_bytes (dbfd, index_ptr); |
10098 | index_ptr += 4; | |
10099 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10100 | index_ptr += 4; | |
10101 | ||
73869dc2 | 10102 | if (version != 1 && version != 2) |
80626a55 | 10103 | { |
21aa081e | 10104 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10105 | " [in module %s]"), |
21aa081e | 10106 | pulongest (version), dwp_file->name); |
80626a55 DE |
10107 | } |
10108 | if (nr_slots != (nr_slots & -nr_slots)) | |
10109 | { | |
21aa081e | 10110 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10111 | " is not power of 2 [in module %s]"), |
21aa081e | 10112 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10113 | } |
10114 | ||
10115 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10116 | htab->version = version; |
10117 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10118 | htab->nr_units = nr_units; |
10119 | htab->nr_slots = nr_slots; | |
10120 | htab->hash_table = index_ptr; | |
10121 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10122 | |
10123 | /* Exit early if the table is empty. */ | |
10124 | if (nr_slots == 0 || nr_units == 0 | |
10125 | || (version == 2 && nr_columns == 0)) | |
10126 | { | |
10127 | /* All must be zero. */ | |
10128 | if (nr_slots != 0 || nr_units != 0 | |
10129 | || (version == 2 && nr_columns != 0)) | |
10130 | { | |
10131 | complaint (&symfile_complaints, | |
10132 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
10133 | " all zero [in modules %s]"), | |
10134 | dwp_file->name); | |
10135 | } | |
10136 | return htab; | |
10137 | } | |
10138 | ||
10139 | if (version == 1) | |
10140 | { | |
10141 | htab->section_pool.v1.indices = | |
10142 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10143 | /* It's harder to decide whether the section is too small in v1. | |
10144 | V1 is deprecated anyway so we punt. */ | |
10145 | } | |
10146 | else | |
10147 | { | |
10148 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10149 | int *ids = htab->section_pool.v2.section_ids; | |
10150 | /* Reverse map for error checking. */ | |
10151 | int ids_seen[DW_SECT_MAX + 1]; | |
10152 | int i; | |
10153 | ||
10154 | if (nr_columns < 2) | |
10155 | { | |
10156 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
10157 | " in section table [in module %s]"), | |
10158 | dwp_file->name); | |
10159 | } | |
10160 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
10161 | { | |
10162 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
10163 | " in section table [in module %s]"), | |
10164 | dwp_file->name); | |
10165 | } | |
10166 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10167 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10168 | for (i = 0; i < nr_columns; ++i) | |
10169 | { | |
10170 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
10171 | ||
10172 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
10173 | { | |
10174 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
10175 | " in section table [in module %s]"), | |
10176 | id, dwp_file->name); | |
10177 | } | |
10178 | if (ids_seen[id] != -1) | |
10179 | { | |
10180 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
10181 | " id %d in section table [in module %s]"), | |
10182 | id, dwp_file->name); | |
10183 | } | |
10184 | ids_seen[id] = i; | |
10185 | ids[i] = id; | |
10186 | } | |
10187 | /* Must have exactly one info or types section. */ | |
10188 | if (((ids_seen[DW_SECT_INFO] != -1) | |
10189 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
10190 | != 1) | |
10191 | { | |
10192 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
10193 | " DWO info/types section [in module %s]"), | |
10194 | dwp_file->name); | |
10195 | } | |
10196 | /* Must have an abbrev section. */ | |
10197 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
10198 | { | |
10199 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
10200 | " section [in module %s]"), | |
10201 | dwp_file->name); | |
10202 | } | |
10203 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
10204 | htab->section_pool.v2.sizes = | |
10205 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
10206 | * nr_units * nr_columns); | |
10207 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
10208 | * nr_units * nr_columns)) | |
10209 | > index_end) | |
10210 | { | |
10211 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
10212 | " [in module %s]"), | |
10213 | dwp_file->name); | |
10214 | } | |
10215 | } | |
80626a55 DE |
10216 | |
10217 | return htab; | |
10218 | } | |
10219 | ||
10220 | /* Update SECTIONS with the data from SECTP. | |
10221 | ||
10222 | This function is like the other "locate" section routines that are | |
10223 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 10224 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
10225 | |
10226 | The result is non-zero for success, or zero if an error was found. */ | |
10227 | ||
10228 | static int | |
73869dc2 DE |
10229 | locate_v1_virtual_dwo_sections (asection *sectp, |
10230 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
10231 | { |
10232 | const struct dwop_section_names *names = &dwop_section_names; | |
10233 | ||
10234 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10235 | { | |
10236 | /* There can be only one. */ | |
049412e3 | 10237 | if (sections->abbrev.s.section != NULL) |
80626a55 | 10238 | return 0; |
049412e3 | 10239 | sections->abbrev.s.section = sectp; |
80626a55 DE |
10240 | sections->abbrev.size = bfd_get_section_size (sectp); |
10241 | } | |
10242 | else if (section_is_p (sectp->name, &names->info_dwo) | |
10243 | || section_is_p (sectp->name, &names->types_dwo)) | |
10244 | { | |
10245 | /* There can be only one. */ | |
049412e3 | 10246 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 10247 | return 0; |
049412e3 | 10248 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
10249 | sections->info_or_types.size = bfd_get_section_size (sectp); |
10250 | } | |
10251 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10252 | { | |
10253 | /* There can be only one. */ | |
049412e3 | 10254 | if (sections->line.s.section != NULL) |
80626a55 | 10255 | return 0; |
049412e3 | 10256 | sections->line.s.section = sectp; |
80626a55 DE |
10257 | sections->line.size = bfd_get_section_size (sectp); |
10258 | } | |
10259 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10260 | { | |
10261 | /* There can be only one. */ | |
049412e3 | 10262 | if (sections->loc.s.section != NULL) |
80626a55 | 10263 | return 0; |
049412e3 | 10264 | sections->loc.s.section = sectp; |
80626a55 DE |
10265 | sections->loc.size = bfd_get_section_size (sectp); |
10266 | } | |
10267 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10268 | { | |
10269 | /* There can be only one. */ | |
049412e3 | 10270 | if (sections->macinfo.s.section != NULL) |
80626a55 | 10271 | return 0; |
049412e3 | 10272 | sections->macinfo.s.section = sectp; |
80626a55 DE |
10273 | sections->macinfo.size = bfd_get_section_size (sectp); |
10274 | } | |
10275 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10276 | { | |
10277 | /* There can be only one. */ | |
049412e3 | 10278 | if (sections->macro.s.section != NULL) |
80626a55 | 10279 | return 0; |
049412e3 | 10280 | sections->macro.s.section = sectp; |
80626a55 DE |
10281 | sections->macro.size = bfd_get_section_size (sectp); |
10282 | } | |
10283 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10284 | { | |
10285 | /* There can be only one. */ | |
049412e3 | 10286 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 10287 | return 0; |
049412e3 | 10288 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
10289 | sections->str_offsets.size = bfd_get_section_size (sectp); |
10290 | } | |
10291 | else | |
10292 | { | |
10293 | /* No other kind of section is valid. */ | |
10294 | return 0; | |
10295 | } | |
10296 | ||
10297 | return 1; | |
10298 | } | |
10299 | ||
73869dc2 DE |
10300 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
10301 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10302 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10303 | This is for DWP version 1 files. */ | |
80626a55 DE |
10304 | |
10305 | static struct dwo_unit * | |
73869dc2 DE |
10306 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
10307 | uint32_t unit_index, | |
10308 | const char *comp_dir, | |
10309 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
10310 | { |
10311 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
10312 | const struct dwp_hash_table *dwp_htab = |
10313 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
10314 | bfd *dbfd = dwp_file->dbfd; |
10315 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10316 | struct dwo_file *dwo_file; | |
10317 | struct dwo_unit *dwo_unit; | |
73869dc2 | 10318 | struct virtual_v1_dwo_sections sections; |
80626a55 | 10319 | void **dwo_file_slot; |
80626a55 DE |
10320 | int i; |
10321 | ||
73869dc2 DE |
10322 | gdb_assert (dwp_file->version == 1); |
10323 | ||
b4f54984 | 10324 | if (dwarf_read_debug) |
80626a55 | 10325 | { |
73869dc2 | 10326 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10327 | kind, |
73869dc2 | 10328 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10329 | dwp_file->name); |
10330 | } | |
10331 | ||
19ac8c2e | 10332 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10333 | Put a limit on the number of sections we look for so that bad data |
10334 | doesn't cause us to loop forever. */ | |
10335 | ||
73869dc2 | 10336 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10337 | (1 /* .debug_info or .debug_types */ \ |
10338 | + 1 /* .debug_abbrev */ \ | |
10339 | + 1 /* .debug_line */ \ | |
10340 | + 1 /* .debug_loc */ \ | |
10341 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10342 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10343 | + 1 /* trailing zero */) |
10344 | ||
10345 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 10346 | |
73869dc2 | 10347 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10348 | { |
10349 | asection *sectp; | |
10350 | uint32_t section_nr = | |
10351 | read_4_bytes (dbfd, | |
73869dc2 DE |
10352 | dwp_htab->section_pool.v1.indices |
10353 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10354 | |
10355 | if (section_nr == 0) | |
10356 | break; | |
10357 | if (section_nr >= dwp_file->num_sections) | |
10358 | { | |
10359 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10360 | " [in module %s]"), | |
10361 | dwp_file->name); | |
10362 | } | |
10363 | ||
10364 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10365 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10366 | { |
10367 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10368 | " [in module %s]"), | |
10369 | dwp_file->name); | |
10370 | } | |
10371 | } | |
10372 | ||
10373 | if (i < 2 | |
a32a8923 DE |
10374 | || dwarf2_section_empty_p (§ions.info_or_types) |
10375 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10376 | { |
10377 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10378 | " [in module %s]"), | |
10379 | dwp_file->name); | |
10380 | } | |
73869dc2 | 10381 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10382 | { |
10383 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10384 | " [in module %s]"), | |
10385 | dwp_file->name); | |
10386 | } | |
10387 | ||
10388 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10389 | have dwo_unit "live" in that. At least for now. | |
10390 | ||
10391 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10392 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10393 | file, we can combine them back into a virtual DWO file to save space |
10394 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10395 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10396 | ||
791afaa2 TT |
10397 | std::string virtual_dwo_name = |
10398 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
10399 | get_section_id (§ions.abbrev), | |
10400 | get_section_id (§ions.line), | |
10401 | get_section_id (§ions.loc), | |
10402 | get_section_id (§ions.str_offsets)); | |
80626a55 | 10403 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 10404 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
80626a55 DE |
10405 | /* Create one if necessary. */ |
10406 | if (*dwo_file_slot == NULL) | |
10407 | { | |
b4f54984 | 10408 | if (dwarf_read_debug) |
80626a55 DE |
10409 | { |
10410 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 10411 | virtual_dwo_name.c_str ()); |
80626a55 DE |
10412 | } |
10413 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10414 | dwo_file->dwo_name |
10415 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
10416 | virtual_dwo_name.c_str (), |
10417 | virtual_dwo_name.size ()); | |
0ac5b59e | 10418 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
10419 | dwo_file->sections.abbrev = sections.abbrev; |
10420 | dwo_file->sections.line = sections.line; | |
10421 | dwo_file->sections.loc = sections.loc; | |
10422 | dwo_file->sections.macinfo = sections.macinfo; | |
10423 | dwo_file->sections.macro = sections.macro; | |
10424 | dwo_file->sections.str_offsets = sections.str_offsets; | |
10425 | /* The "str" section is global to the entire DWP file. */ | |
10426 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 10427 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
10428 | there's no need to record it in dwo_file. |
10429 | Also, we can't simply record type sections in dwo_file because | |
10430 | we record a pointer into the vector in dwo_unit. As we collect more | |
10431 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
10432 | for it, invalidating all copies of pointers into the previous |
10433 | contents. */ | |
80626a55 DE |
10434 | *dwo_file_slot = dwo_file; |
10435 | } | |
10436 | else | |
10437 | { | |
b4f54984 | 10438 | if (dwarf_read_debug) |
80626a55 DE |
10439 | { |
10440 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 10441 | virtual_dwo_name.c_str ()); |
80626a55 | 10442 | } |
9a3c8263 | 10443 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 10444 | } |
80626a55 DE |
10445 | |
10446 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10447 | dwo_unit->dwo_file = dwo_file; | |
10448 | dwo_unit->signature = signature; | |
8d749320 SM |
10449 | dwo_unit->section = |
10450 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 10451 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 10452 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
10453 | |
10454 | return dwo_unit; | |
10455 | } | |
10456 | ||
73869dc2 DE |
10457 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
10458 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
10459 | piece within that section used by a TU/CU, return a virtual section | |
10460 | of just that piece. */ | |
10461 | ||
10462 | static struct dwarf2_section_info | |
10463 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
10464 | bfd_size_type offset, bfd_size_type size) | |
10465 | { | |
10466 | struct dwarf2_section_info result; | |
10467 | asection *sectp; | |
10468 | ||
10469 | gdb_assert (section != NULL); | |
10470 | gdb_assert (!section->is_virtual); | |
10471 | ||
10472 | memset (&result, 0, sizeof (result)); | |
10473 | result.s.containing_section = section; | |
10474 | result.is_virtual = 1; | |
10475 | ||
10476 | if (size == 0) | |
10477 | return result; | |
10478 | ||
10479 | sectp = get_section_bfd_section (section); | |
10480 | ||
10481 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
10482 | bounds of the real section. This is a pretty-rare event, so just | |
10483 | flag an error (easier) instead of a warning and trying to cope. */ | |
10484 | if (sectp == NULL | |
10485 | || offset + size > bfd_get_section_size (sectp)) | |
10486 | { | |
10487 | bfd *abfd = sectp->owner; | |
10488 | ||
10489 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
10490 | " in section %s [in module %s]"), | |
10491 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
10492 | objfile_name (dwarf2_per_objfile->objfile)); | |
10493 | } | |
10494 | ||
10495 | result.virtual_offset = offset; | |
10496 | result.size = size; | |
10497 | return result; | |
10498 | } | |
10499 | ||
10500 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
10501 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10502 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10503 | This is for DWP version 2 files. */ | |
10504 | ||
10505 | static struct dwo_unit * | |
10506 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
10507 | uint32_t unit_index, | |
10508 | const char *comp_dir, | |
10509 | ULONGEST signature, int is_debug_types) | |
10510 | { | |
10511 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10512 | const struct dwp_hash_table *dwp_htab = | |
10513 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10514 | bfd *dbfd = dwp_file->dbfd; | |
10515 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10516 | struct dwo_file *dwo_file; | |
10517 | struct dwo_unit *dwo_unit; | |
10518 | struct virtual_v2_dwo_sections sections; | |
10519 | void **dwo_file_slot; | |
73869dc2 DE |
10520 | int i; |
10521 | ||
10522 | gdb_assert (dwp_file->version == 2); | |
10523 | ||
b4f54984 | 10524 | if (dwarf_read_debug) |
73869dc2 DE |
10525 | { |
10526 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
10527 | kind, | |
10528 | pulongest (unit_index), hex_string (signature), | |
10529 | dwp_file->name); | |
10530 | } | |
10531 | ||
10532 | /* Fetch the section offsets of this DWO unit. */ | |
10533 | ||
10534 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
10535 | |
10536 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
10537 | { | |
10538 | uint32_t offset = read_4_bytes (dbfd, | |
10539 | dwp_htab->section_pool.v2.offsets | |
10540 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10541 | + i) | |
10542 | * sizeof (uint32_t))); | |
10543 | uint32_t size = read_4_bytes (dbfd, | |
10544 | dwp_htab->section_pool.v2.sizes | |
10545 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10546 | + i) | |
10547 | * sizeof (uint32_t))); | |
10548 | ||
10549 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
10550 | { | |
10551 | case DW_SECT_INFO: | |
10552 | case DW_SECT_TYPES: | |
10553 | sections.info_or_types_offset = offset; | |
10554 | sections.info_or_types_size = size; | |
10555 | break; | |
10556 | case DW_SECT_ABBREV: | |
10557 | sections.abbrev_offset = offset; | |
10558 | sections.abbrev_size = size; | |
10559 | break; | |
10560 | case DW_SECT_LINE: | |
10561 | sections.line_offset = offset; | |
10562 | sections.line_size = size; | |
10563 | break; | |
10564 | case DW_SECT_LOC: | |
10565 | sections.loc_offset = offset; | |
10566 | sections.loc_size = size; | |
10567 | break; | |
10568 | case DW_SECT_STR_OFFSETS: | |
10569 | sections.str_offsets_offset = offset; | |
10570 | sections.str_offsets_size = size; | |
10571 | break; | |
10572 | case DW_SECT_MACINFO: | |
10573 | sections.macinfo_offset = offset; | |
10574 | sections.macinfo_size = size; | |
10575 | break; | |
10576 | case DW_SECT_MACRO: | |
10577 | sections.macro_offset = offset; | |
10578 | sections.macro_size = size; | |
10579 | break; | |
10580 | } | |
10581 | } | |
10582 | ||
10583 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10584 | have dwo_unit "live" in that. At least for now. | |
10585 | ||
10586 | The DWP file can be made up of a random collection of CUs and TUs. | |
10587 | However, for each CU + set of TUs that came from the same original DWO | |
10588 | file, we can combine them back into a virtual DWO file to save space | |
10589 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10590 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10591 | ||
791afaa2 TT |
10592 | std::string virtual_dwo_name = |
10593 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10594 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10595 | (long) (sections.line_size ? sections.line_offset : 0), | |
10596 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10597 | (long) (sections.str_offsets_size | |
10598 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 10599 | /* Can we use an existing virtual DWO file? */ |
791afaa2 | 10600 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name.c_str (), comp_dir); |
73869dc2 DE |
10601 | /* Create one if necessary. */ |
10602 | if (*dwo_file_slot == NULL) | |
10603 | { | |
b4f54984 | 10604 | if (dwarf_read_debug) |
73869dc2 DE |
10605 | { |
10606 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 10607 | virtual_dwo_name.c_str ()); |
73869dc2 DE |
10608 | } |
10609 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10610 | dwo_file->dwo_name |
10611 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
791afaa2 TT |
10612 | virtual_dwo_name.c_str (), |
10613 | virtual_dwo_name.size ()); | |
73869dc2 DE |
10614 | dwo_file->comp_dir = comp_dir; |
10615 | dwo_file->sections.abbrev = | |
10616 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10617 | sections.abbrev_offset, sections.abbrev_size); | |
10618 | dwo_file->sections.line = | |
10619 | create_dwp_v2_section (&dwp_file->sections.line, | |
10620 | sections.line_offset, sections.line_size); | |
10621 | dwo_file->sections.loc = | |
10622 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10623 | sections.loc_offset, sections.loc_size); | |
10624 | dwo_file->sections.macinfo = | |
10625 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10626 | sections.macinfo_offset, sections.macinfo_size); | |
10627 | dwo_file->sections.macro = | |
10628 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10629 | sections.macro_offset, sections.macro_size); | |
10630 | dwo_file->sections.str_offsets = | |
10631 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10632 | sections.str_offsets_offset, | |
10633 | sections.str_offsets_size); | |
10634 | /* The "str" section is global to the entire DWP file. */ | |
10635 | dwo_file->sections.str = dwp_file->sections.str; | |
10636 | /* The info or types section is assigned below to dwo_unit, | |
10637 | there's no need to record it in dwo_file. | |
10638 | Also, we can't simply record type sections in dwo_file because | |
10639 | we record a pointer into the vector in dwo_unit. As we collect more | |
10640 | types we'll grow the vector and eventually have to reallocate space | |
10641 | for it, invalidating all copies of pointers into the previous | |
10642 | contents. */ | |
10643 | *dwo_file_slot = dwo_file; | |
10644 | } | |
10645 | else | |
10646 | { | |
b4f54984 | 10647 | if (dwarf_read_debug) |
73869dc2 DE |
10648 | { |
10649 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 10650 | virtual_dwo_name.c_str ()); |
73869dc2 | 10651 | } |
9a3c8263 | 10652 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 10653 | } |
73869dc2 DE |
10654 | |
10655 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10656 | dwo_unit->dwo_file = dwo_file; | |
10657 | dwo_unit->signature = signature; | |
8d749320 SM |
10658 | dwo_unit->section = |
10659 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
10660 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
10661 | ? &dwp_file->sections.types | |
10662 | : &dwp_file->sections.info, | |
10663 | sections.info_or_types_offset, | |
10664 | sections.info_or_types_size); | |
10665 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10666 | ||
10667 | return dwo_unit; | |
10668 | } | |
10669 | ||
57d63ce2 DE |
10670 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10671 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10672 | |
10673 | static struct dwo_unit * | |
57d63ce2 DE |
10674 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10675 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10676 | { |
57d63ce2 DE |
10677 | const struct dwp_hash_table *dwp_htab = |
10678 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10679 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10680 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10681 | uint32_t hash = signature & mask; |
10682 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10683 | unsigned int i; | |
10684 | void **slot; | |
870f88f7 | 10685 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
10686 | |
10687 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10688 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10689 | slot = htab_find_slot (is_debug_types |
10690 | ? dwp_file->loaded_tus | |
10691 | : dwp_file->loaded_cus, | |
10692 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10693 | |
10694 | if (*slot != NULL) | |
9a3c8263 | 10695 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10696 | |
10697 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10698 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10699 | { |
10700 | ULONGEST signature_in_table; | |
10701 | ||
10702 | signature_in_table = | |
57d63ce2 | 10703 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10704 | if (signature_in_table == signature) |
10705 | { | |
57d63ce2 DE |
10706 | uint32_t unit_index = |
10707 | read_4_bytes (dbfd, | |
10708 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10709 | |
73869dc2 DE |
10710 | if (dwp_file->version == 1) |
10711 | { | |
10712 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10713 | comp_dir, signature, | |
10714 | is_debug_types); | |
10715 | } | |
10716 | else | |
10717 | { | |
10718 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10719 | comp_dir, signature, | |
10720 | is_debug_types); | |
10721 | } | |
9a3c8263 | 10722 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10723 | } |
10724 | if (signature_in_table == 0) | |
10725 | return NULL; | |
10726 | hash = (hash + hash2) & mask; | |
10727 | } | |
10728 | ||
10729 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10730 | " [in module %s]"), | |
10731 | dwp_file->name); | |
10732 | } | |
10733 | ||
ab5088bf | 10734 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10735 | Open the file specified by FILE_NAME and hand it off to BFD for |
10736 | preliminary analysis. Return a newly initialized bfd *, which | |
10737 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10738 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10739 | SEARCH_CWD is true if the current directory is to be searched. |
10740 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10741 | If successful, the file is added to the bfd include table of the |
10742 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10743 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10744 | NOTE: This function is derived from symfile_bfd_open. */ |
10745 | ||
192b62ce | 10746 | static gdb_bfd_ref_ptr |
6ac97d4c | 10747 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 10748 | { |
80626a55 | 10749 | int desc, flags; |
3019eac3 | 10750 | char *absolute_name; |
9c02c129 DE |
10751 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10752 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10753 | to debug_file_directory. */ | |
10754 | char *search_path; | |
10755 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10756 | ||
6ac97d4c DE |
10757 | if (search_cwd) |
10758 | { | |
10759 | if (*debug_file_directory != '\0') | |
10760 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 10761 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
10762 | else |
10763 | search_path = xstrdup ("."); | |
10764 | } | |
9c02c129 | 10765 | else |
6ac97d4c | 10766 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10767 | |
492c0ab7 | 10768 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10769 | if (is_dwp) |
10770 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10771 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10772 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10773 | xfree (search_path); |
3019eac3 DE |
10774 | if (desc < 0) |
10775 | return NULL; | |
10776 | ||
192b62ce | 10777 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 10778 | xfree (absolute_name); |
9c02c129 DE |
10779 | if (sym_bfd == NULL) |
10780 | return NULL; | |
192b62ce | 10781 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 10782 | |
192b62ce TT |
10783 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
10784 | return NULL; | |
3019eac3 | 10785 | |
13aaf454 DE |
10786 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10787 | This is important because things like demangled_names_hash lives in the | |
10788 | objfile's per_bfd space and may have references to things like symbol | |
10789 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 10790 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 10791 | |
3019eac3 DE |
10792 | return sym_bfd; |
10793 | } | |
10794 | ||
ab5088bf | 10795 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10796 | COMP_DIR is the DW_AT_comp_dir attribute. |
10797 | The result is the bfd handle of the file. | |
10798 | If there is a problem finding or opening the file, return NULL. | |
10799 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10800 | same as symfile_bfd_open. */ | |
10801 | ||
192b62ce | 10802 | static gdb_bfd_ref_ptr |
ab5088bf | 10803 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 10804 | { |
80626a55 | 10805 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10806 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10807 | |
10808 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10809 | ||
10810 | if (comp_dir != NULL) | |
10811 | { | |
b36cec19 PA |
10812 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
10813 | file_name, (char *) NULL); | |
3019eac3 DE |
10814 | |
10815 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10816 | search path, which seems useful. */ | |
192b62ce TT |
10817 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
10818 | 1 /*search_cwd*/)); | |
3019eac3 DE |
10819 | xfree (path_to_try); |
10820 | if (abfd != NULL) | |
10821 | return abfd; | |
10822 | } | |
10823 | ||
10824 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10825 | is a list of paths. */ | |
10826 | ||
10827 | if (*debug_file_directory == '\0') | |
10828 | return NULL; | |
10829 | ||
6ac97d4c | 10830 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10831 | } |
10832 | ||
80626a55 DE |
10833 | /* This function is mapped across the sections and remembers the offset and |
10834 | size of each of the DWO debugging sections we are interested in. */ | |
10835 | ||
10836 | static void | |
10837 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10838 | { | |
9a3c8263 | 10839 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
10840 | const struct dwop_section_names *names = &dwop_section_names; |
10841 | ||
10842 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10843 | { | |
049412e3 | 10844 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
10845 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10846 | } | |
10847 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10848 | { | |
049412e3 | 10849 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
10850 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10851 | } | |
10852 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10853 | { | |
049412e3 | 10854 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
10855 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10856 | } | |
10857 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10858 | { | |
049412e3 | 10859 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
10860 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10861 | } | |
10862 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10863 | { | |
049412e3 | 10864 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
10865 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10866 | } | |
10867 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10868 | { | |
049412e3 | 10869 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
10870 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10871 | } | |
10872 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10873 | { | |
049412e3 | 10874 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
10875 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10876 | } | |
10877 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10878 | { | |
049412e3 | 10879 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
10880 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10881 | } | |
10882 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10883 | { | |
10884 | struct dwarf2_section_info type_section; | |
10885 | ||
10886 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 10887 | type_section.s.section = sectp; |
80626a55 DE |
10888 | type_section.size = bfd_get_section_size (sectp); |
10889 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10890 | &type_section); | |
10891 | } | |
10892 | } | |
10893 | ||
ab5088bf | 10894 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10895 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10896 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10897 | |
10898 | static struct dwo_file * | |
0ac5b59e DE |
10899 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10900 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10901 | { |
10902 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 10903 | struct dwo_file *dwo_file; |
3019eac3 DE |
10904 | struct cleanup *cleanups; |
10905 | ||
192b62ce | 10906 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
10907 | if (dbfd == NULL) |
10908 | { | |
b4f54984 | 10909 | if (dwarf_read_debug) |
80626a55 DE |
10910 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
10911 | return NULL; | |
10912 | } | |
10913 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10914 | dwo_file->dwo_name = dwo_name; |
10915 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 10916 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
10917 | |
10918 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10919 | ||
192b62ce TT |
10920 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
10921 | &dwo_file->sections); | |
3019eac3 | 10922 | |
33c5cd75 | 10923 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 10924 | |
78d4d2c5 JK |
10925 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
10926 | dwo_file->tus); | |
3019eac3 DE |
10927 | |
10928 | discard_cleanups (cleanups); | |
10929 | ||
b4f54984 | 10930 | if (dwarf_read_debug) |
80626a55 DE |
10931 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
10932 | ||
3019eac3 DE |
10933 | return dwo_file; |
10934 | } | |
10935 | ||
80626a55 | 10936 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10937 | size of each of the DWP debugging sections common to version 1 and 2 that |
10938 | we are interested in. */ | |
3019eac3 | 10939 | |
80626a55 | 10940 | static void |
73869dc2 DE |
10941 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10942 | void *dwp_file_ptr) | |
3019eac3 | 10943 | { |
9a3c8263 | 10944 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
10945 | const struct dwop_section_names *names = &dwop_section_names; |
10946 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10947 | |
80626a55 | 10948 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10949 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10950 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10951 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10952 | |
80626a55 DE |
10953 | /* Look for specific sections that we need. */ |
10954 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10955 | { | |
049412e3 | 10956 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
10957 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10958 | } | |
10959 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10960 | { | |
049412e3 | 10961 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
10962 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10963 | } | |
10964 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10965 | { | |
049412e3 | 10966 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
10967 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10968 | } | |
10969 | } | |
3019eac3 | 10970 | |
73869dc2 DE |
10971 | /* This function is mapped across the sections and remembers the offset and |
10972 | size of each of the DWP version 2 debugging sections that we are interested | |
10973 | in. This is split into a separate function because we don't know if we | |
10974 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
10975 | ||
10976 | static void | |
10977 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
10978 | { | |
9a3c8263 | 10979 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
10980 | const struct dwop_section_names *names = &dwop_section_names; |
10981 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
10982 | ||
10983 | /* Record the ELF section number for later lookup: this is what the | |
10984 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
10985 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
10986 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
10987 | ||
10988 | /* Look for specific sections that we need. */ | |
10989 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10990 | { | |
049412e3 | 10991 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
10992 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
10993 | } | |
10994 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10995 | { | |
049412e3 | 10996 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
10997 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
10998 | } | |
10999 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11000 | { | |
049412e3 | 11001 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11002 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11003 | } | |
11004 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11005 | { | |
049412e3 | 11006 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11007 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11008 | } | |
11009 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11010 | { | |
049412e3 | 11011 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11012 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11013 | } | |
11014 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11015 | { | |
049412e3 | 11016 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11017 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11018 | } | |
11019 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11020 | { | |
049412e3 | 11021 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11022 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11023 | } | |
11024 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11025 | { | |
049412e3 | 11026 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11027 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11028 | } | |
11029 | } | |
11030 | ||
80626a55 | 11031 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11032 | |
80626a55 DE |
11033 | static hashval_t |
11034 | hash_dwp_loaded_cutus (const void *item) | |
11035 | { | |
9a3c8263 | 11036 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11037 | |
80626a55 DE |
11038 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11039 | return dwo_unit->signature; | |
3019eac3 DE |
11040 | } |
11041 | ||
80626a55 | 11042 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11043 | |
80626a55 DE |
11044 | static int |
11045 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11046 | { |
9a3c8263 SM |
11047 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11048 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11049 | |
80626a55 DE |
11050 | return dua->signature == dub->signature; |
11051 | } | |
3019eac3 | 11052 | |
80626a55 | 11053 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11054 | |
80626a55 DE |
11055 | static htab_t |
11056 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11057 | { | |
11058 | return htab_create_alloc_ex (3, | |
11059 | hash_dwp_loaded_cutus, | |
11060 | eq_dwp_loaded_cutus, | |
11061 | NULL, | |
11062 | &objfile->objfile_obstack, | |
11063 | hashtab_obstack_allocate, | |
11064 | dummy_obstack_deallocate); | |
11065 | } | |
3019eac3 | 11066 | |
ab5088bf DE |
11067 | /* Try to open DWP file FILE_NAME. |
11068 | The result is the bfd handle of the file. | |
11069 | If there is a problem finding or opening the file, return NULL. | |
11070 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11071 | same as symfile_bfd_open. */ | |
11072 | ||
192b62ce | 11073 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11074 | open_dwp_file (const char *file_name) |
11075 | { | |
192b62ce TT |
11076 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11077 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11078 | if (abfd != NULL) |
11079 | return abfd; | |
11080 | ||
11081 | /* Work around upstream bug 15652. | |
11082 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11083 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11084 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11085 | of the executable's path may have discarded the needed info. | |
11086 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11087 | .gnu_debuglink, but that doesn't exist yet.] | |
11088 | Strip the directory from FILE_NAME and search again. */ | |
11089 | if (*debug_file_directory != '\0') | |
11090 | { | |
11091 | /* Don't implicitly search the current directory here. | |
11092 | If the user wants to search "." to handle this case, | |
11093 | it must be added to debug-file-directory. */ | |
11094 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11095 | 0 /*search_cwd*/); | |
11096 | } | |
11097 | ||
11098 | return NULL; | |
ab5088bf DE |
11099 | } |
11100 | ||
80626a55 DE |
11101 | /* Initialize the use of the DWP file for the current objfile. |
11102 | By convention the name of the DWP file is ${objfile}.dwp. | |
11103 | The result is NULL if it can't be found. */ | |
a766d390 | 11104 | |
80626a55 | 11105 | static struct dwp_file * |
ab5088bf | 11106 | open_and_init_dwp_file (void) |
80626a55 DE |
11107 | { |
11108 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11109 | struct dwp_file *dwp_file; | |
80626a55 | 11110 | |
82bf32bc JK |
11111 | /* Try to find first .dwp for the binary file before any symbolic links |
11112 | resolving. */ | |
6c447423 DE |
11113 | |
11114 | /* If the objfile is a debug file, find the name of the real binary | |
11115 | file and get the name of dwp file from there. */ | |
d721ba37 | 11116 | std::string dwp_name; |
6c447423 DE |
11117 | if (objfile->separate_debug_objfile_backlink != NULL) |
11118 | { | |
11119 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11120 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11121 | |
d721ba37 | 11122 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11123 | } |
11124 | else | |
d721ba37 PA |
11125 | dwp_name = objfile->original_name; |
11126 | ||
11127 | dwp_name += ".dwp"; | |
80626a55 | 11128 | |
d721ba37 | 11129 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
11130 | if (dbfd == NULL |
11131 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
11132 | { | |
11133 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
11134 | dwp_name = objfile_name (objfile); |
11135 | dwp_name += ".dwp"; | |
11136 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
11137 | } |
11138 | ||
80626a55 DE |
11139 | if (dbfd == NULL) |
11140 | { | |
b4f54984 | 11141 | if (dwarf_read_debug) |
d721ba37 | 11142 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 11143 | return NULL; |
3019eac3 | 11144 | } |
80626a55 | 11145 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
11146 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
11147 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 11148 | |
80626a55 | 11149 | /* +1: section 0 is unused */ |
192b62ce | 11150 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
11151 | dwp_file->elf_sections = |
11152 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
11153 | dwp_file->num_sections, asection *); | |
11154 | ||
192b62ce TT |
11155 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
11156 | dwp_file); | |
80626a55 DE |
11157 | |
11158 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
11159 | ||
11160 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
11161 | ||
73869dc2 | 11162 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
11163 | if (dwp_file->cus && dwp_file->tus |
11164 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
11165 | { |
11166 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 11167 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 11168 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
11169 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
11170 | " TU version %s [in DWP file %s]"), | |
11171 | pulongest (dwp_file->cus->version), | |
d721ba37 | 11172 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 11173 | } |
08302ed2 DE |
11174 | |
11175 | if (dwp_file->cus) | |
11176 | dwp_file->version = dwp_file->cus->version; | |
11177 | else if (dwp_file->tus) | |
11178 | dwp_file->version = dwp_file->tus->version; | |
11179 | else | |
11180 | dwp_file->version = 2; | |
73869dc2 DE |
11181 | |
11182 | if (dwp_file->version == 2) | |
192b62ce TT |
11183 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
11184 | dwp_file); | |
73869dc2 | 11185 | |
19ac8c2e DE |
11186 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
11187 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 11188 | |
b4f54984 | 11189 | if (dwarf_read_debug) |
80626a55 DE |
11190 | { |
11191 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
11192 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
11193 | " %s CUs, %s TUs\n", |
11194 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
11195 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
11196 | } |
11197 | ||
11198 | return dwp_file; | |
3019eac3 | 11199 | } |
c906108c | 11200 | |
ab5088bf DE |
11201 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
11202 | ||
11203 | static struct dwp_file * | |
11204 | get_dwp_file (void) | |
11205 | { | |
11206 | if (! dwarf2_per_objfile->dwp_checked) | |
11207 | { | |
11208 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
11209 | dwarf2_per_objfile->dwp_checked = 1; | |
11210 | } | |
11211 | return dwarf2_per_objfile->dwp_file; | |
11212 | } | |
11213 | ||
80626a55 DE |
11214 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
11215 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
11216 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 11217 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
11218 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
11219 | ||
11220 | This is called, for example, when wanting to read a variable with a | |
11221 | complex location. Therefore we don't want to do file i/o for every call. | |
11222 | Therefore we don't want to look for a DWO file on every call. | |
11223 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
11224 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
11225 | for a DWO file. | |
11226 | ||
1c658ad5 | 11227 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 11228 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 11229 | |
3019eac3 | 11230 | static struct dwo_unit * |
80626a55 DE |
11231 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
11232 | const char *dwo_name, const char *comp_dir, | |
11233 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
11234 | { |
11235 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
11236 | const char *kind = is_debug_types ? "TU" : "CU"; |
11237 | void **dwo_file_slot; | |
3019eac3 | 11238 | struct dwo_file *dwo_file; |
80626a55 | 11239 | struct dwp_file *dwp_file; |
cb1df416 | 11240 | |
6a506a2d DE |
11241 | /* First see if there's a DWP file. |
11242 | If we have a DWP file but didn't find the DWO inside it, don't | |
11243 | look for the original DWO file. It makes gdb behave differently | |
11244 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 11245 | |
ab5088bf | 11246 | dwp_file = get_dwp_file (); |
80626a55 | 11247 | if (dwp_file != NULL) |
cf2c3c16 | 11248 | { |
80626a55 DE |
11249 | const struct dwp_hash_table *dwp_htab = |
11250 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11251 | ||
11252 | if (dwp_htab != NULL) | |
11253 | { | |
11254 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
11255 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
11256 | signature, is_debug_types); | |
80626a55 DE |
11257 | |
11258 | if (dwo_cutu != NULL) | |
11259 | { | |
b4f54984 | 11260 | if (dwarf_read_debug) |
80626a55 DE |
11261 | { |
11262 | fprintf_unfiltered (gdb_stdlog, | |
11263 | "Virtual DWO %s %s found: @%s\n", | |
11264 | kind, hex_string (signature), | |
11265 | host_address_to_string (dwo_cutu)); | |
11266 | } | |
11267 | return dwo_cutu; | |
11268 | } | |
11269 | } | |
11270 | } | |
6a506a2d | 11271 | else |
80626a55 | 11272 | { |
6a506a2d | 11273 | /* No DWP file, look for the DWO file. */ |
80626a55 | 11274 | |
6a506a2d DE |
11275 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
11276 | if (*dwo_file_slot == NULL) | |
80626a55 | 11277 | { |
6a506a2d DE |
11278 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
11279 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 11280 | } |
6a506a2d | 11281 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 11282 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 11283 | |
6a506a2d | 11284 | if (dwo_file != NULL) |
19c3d4c9 | 11285 | { |
6a506a2d DE |
11286 | struct dwo_unit *dwo_cutu = NULL; |
11287 | ||
11288 | if (is_debug_types && dwo_file->tus) | |
11289 | { | |
11290 | struct dwo_unit find_dwo_cutu; | |
11291 | ||
11292 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11293 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11294 | dwo_cutu |
11295 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 11296 | } |
33c5cd75 | 11297 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 11298 | { |
33c5cd75 DB |
11299 | struct dwo_unit find_dwo_cutu; |
11300 | ||
11301 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11302 | find_dwo_cutu.signature = signature; | |
11303 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
11304 | &find_dwo_cutu); | |
6a506a2d DE |
11305 | } |
11306 | ||
11307 | if (dwo_cutu != NULL) | |
11308 | { | |
b4f54984 | 11309 | if (dwarf_read_debug) |
6a506a2d DE |
11310 | { |
11311 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11312 | kind, dwo_name, hex_string (signature), | |
11313 | host_address_to_string (dwo_cutu)); | |
11314 | } | |
11315 | return dwo_cutu; | |
80626a55 DE |
11316 | } |
11317 | } | |
2e276125 | 11318 | } |
9cdd5dbd | 11319 | |
80626a55 DE |
11320 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11321 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11322 | correctly to find the file. */ | |
11323 | ||
b4f54984 | 11324 | if (dwarf_read_debug) |
80626a55 DE |
11325 | { |
11326 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11327 | kind, dwo_name, hex_string (signature)); | |
11328 | } | |
3019eac3 | 11329 | |
6656a72d DE |
11330 | /* This is a warning and not a complaint because it can be caused by |
11331 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11332 | { |
11333 | /* Print the name of the DWP file if we looked there, helps the user | |
11334 | better diagnose the problem. */ | |
791afaa2 | 11335 | std::string dwp_text; |
43942612 DE |
11336 | |
11337 | if (dwp_file != NULL) | |
791afaa2 TT |
11338 | dwp_text = string_printf (" [in DWP file %s]", |
11339 | lbasename (dwp_file->name)); | |
43942612 DE |
11340 | |
11341 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11342 | " [in module %s]"), | |
11343 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 11344 | dwp_text.c_str (), |
43942612 | 11345 | this_unit->is_debug_types ? "TU" : "CU", |
9c541725 | 11346 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 11347 | } |
3019eac3 | 11348 | return NULL; |
5fb290d7 DJ |
11349 | } |
11350 | ||
80626a55 DE |
11351 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11352 | See lookup_dwo_cutu_unit for details. */ | |
11353 | ||
11354 | static struct dwo_unit * | |
11355 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11356 | const char *dwo_name, const char *comp_dir, | |
11357 | ULONGEST signature) | |
11358 | { | |
11359 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11360 | } | |
11361 | ||
11362 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11363 | See lookup_dwo_cutu_unit for details. */ | |
11364 | ||
11365 | static struct dwo_unit * | |
11366 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11367 | const char *dwo_name, const char *comp_dir) | |
11368 | { | |
11369 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11370 | } | |
11371 | ||
89e63ee4 DE |
11372 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11373 | ||
11374 | static int | |
11375 | queue_and_load_dwo_tu (void **slot, void *info) | |
11376 | { | |
11377 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11378 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11379 | ULONGEST signature = dwo_unit->signature; | |
11380 | struct signatured_type *sig_type = | |
11381 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11382 | ||
11383 | if (sig_type != NULL) | |
11384 | { | |
11385 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11386 | ||
11387 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11388 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11389 | while processing PER_CU. */ | |
11390 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11391 | load_full_type_unit (sig_cu); | |
11392 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11393 | } | |
11394 | ||
11395 | return 1; | |
11396 | } | |
11397 | ||
11398 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11399 | The DWO may have the only definition of the type, though it may not be | |
11400 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11401 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11402 | ||
11403 | static void | |
11404 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11405 | { | |
11406 | struct dwo_unit *dwo_unit; | |
11407 | struct dwo_file *dwo_file; | |
11408 | ||
11409 | gdb_assert (!per_cu->is_debug_types); | |
11410 | gdb_assert (get_dwp_file () == NULL); | |
11411 | gdb_assert (per_cu->cu != NULL); | |
11412 | ||
11413 | dwo_unit = per_cu->cu->dwo_unit; | |
11414 | gdb_assert (dwo_unit != NULL); | |
11415 | ||
11416 | dwo_file = dwo_unit->dwo_file; | |
11417 | if (dwo_file->tus != NULL) | |
11418 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
11419 | } | |
11420 | ||
3019eac3 DE |
11421 | /* Free all resources associated with DWO_FILE. |
11422 | Close the DWO file and munmap the sections. | |
11423 | All memory should be on the objfile obstack. */ | |
348e048f DE |
11424 | |
11425 | static void | |
3019eac3 | 11426 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 11427 | { |
348e048f | 11428 | |
5c6fa7ab | 11429 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 11430 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 11431 | |
3019eac3 DE |
11432 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
11433 | } | |
348e048f | 11434 | |
3019eac3 | 11435 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 11436 | |
3019eac3 DE |
11437 | static void |
11438 | free_dwo_file_cleanup (void *arg) | |
11439 | { | |
11440 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
11441 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 11442 | |
3019eac3 DE |
11443 | free_dwo_file (dwo_file, objfile); |
11444 | } | |
348e048f | 11445 | |
3019eac3 | 11446 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 11447 | |
3019eac3 DE |
11448 | static int |
11449 | free_dwo_file_from_slot (void **slot, void *info) | |
11450 | { | |
11451 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
11452 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 11453 | |
3019eac3 | 11454 | free_dwo_file (dwo_file, objfile); |
348e048f | 11455 | |
3019eac3 DE |
11456 | return 1; |
11457 | } | |
348e048f | 11458 | |
3019eac3 | 11459 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 11460 | |
3019eac3 DE |
11461 | static void |
11462 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
11463 | { | |
11464 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 11465 | } |
3019eac3 DE |
11466 | \f |
11467 | /* Read in various DIEs. */ | |
348e048f | 11468 | |
d389af10 | 11469 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
11470 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
11471 | already referenced by DW_AT_abstract_origin from the children of the | |
11472 | current DIE. */ | |
d389af10 JK |
11473 | |
11474 | static void | |
11475 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
11476 | { | |
11477 | struct die_info *child_die; | |
791afaa2 | 11478 | sect_offset *offsetp; |
d389af10 JK |
11479 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
11480 | struct die_info *origin_die; | |
11481 | /* Iterator of the ORIGIN_DIE children. */ | |
11482 | struct die_info *origin_child_die; | |
d389af10 | 11483 | struct attribute *attr; |
cd02d79d PA |
11484 | struct dwarf2_cu *origin_cu; |
11485 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
11486 | |
11487 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11488 | if (!attr) | |
11489 | return; | |
11490 | ||
cd02d79d PA |
11491 | /* Note that following die references may follow to a die in a |
11492 | different cu. */ | |
11493 | ||
11494 | origin_cu = cu; | |
11495 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
11496 | ||
11497 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
11498 | symbols in. */ | |
11499 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
11500 | origin_cu->list_in_scope = cu->list_in_scope; | |
11501 | ||
edb3359d DJ |
11502 | if (die->tag != origin_die->tag |
11503 | && !(die->tag == DW_TAG_inlined_subroutine | |
11504 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11505 | complaint (&symfile_complaints, |
11506 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
11507 | to_underlying (die->sect_off), |
11508 | to_underlying (origin_die->sect_off)); | |
d389af10 | 11509 | |
791afaa2 | 11510 | std::vector<sect_offset> offsets; |
d389af10 | 11511 | |
3ea89b92 PMR |
11512 | for (child_die = die->child; |
11513 | child_die && child_die->tag; | |
11514 | child_die = sibling_die (child_die)) | |
11515 | { | |
11516 | struct die_info *child_origin_die; | |
11517 | struct dwarf2_cu *child_origin_cu; | |
11518 | ||
11519 | /* We are trying to process concrete instance entries: | |
216f72a1 | 11520 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
11521 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
11522 | present in the abstract instance but not referenced in the concrete | |
11523 | one. */ | |
216f72a1 JK |
11524 | if (child_die->tag == DW_TAG_call_site |
11525 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
11526 | continue; |
11527 | ||
c38f313d DJ |
11528 | /* For each CHILD_DIE, find the corresponding child of |
11529 | ORIGIN_DIE. If there is more than one layer of | |
11530 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
11531 | but GCC versions at least through 4.4 generate this (GCC PR | |
11532 | 40573). */ | |
3ea89b92 PMR |
11533 | child_origin_die = child_die; |
11534 | child_origin_cu = cu; | |
c38f313d DJ |
11535 | while (1) |
11536 | { | |
cd02d79d PA |
11537 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
11538 | child_origin_cu); | |
c38f313d DJ |
11539 | if (attr == NULL) |
11540 | break; | |
cd02d79d PA |
11541 | child_origin_die = follow_die_ref (child_origin_die, attr, |
11542 | &child_origin_cu); | |
c38f313d DJ |
11543 | } |
11544 | ||
d389af10 JK |
11545 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
11546 | counterpart may exist. */ | |
c38f313d | 11547 | if (child_origin_die != child_die) |
d389af10 | 11548 | { |
edb3359d DJ |
11549 | if (child_die->tag != child_origin_die->tag |
11550 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
11551 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11552 | complaint (&symfile_complaints, |
11553 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
11554 | "different tags"), |
11555 | to_underlying (child_die->sect_off), | |
11556 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
11557 | if (child_origin_die->parent != origin_die) |
11558 | complaint (&symfile_complaints, | |
11559 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
11560 | "different parents"), |
11561 | to_underlying (child_die->sect_off), | |
11562 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 11563 | else |
791afaa2 | 11564 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 11565 | } |
d389af10 | 11566 | } |
791afaa2 TT |
11567 | std::sort (offsets.begin (), offsets.end ()); |
11568 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
11569 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 11570 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
11571 | complaint (&symfile_complaints, |
11572 | _("Multiple children of DIE 0x%x refer " | |
11573 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 11574 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 | 11575 | |
791afaa2 | 11576 | offsetp = offsets.data (); |
d389af10 JK |
11577 | origin_child_die = origin_die->child; |
11578 | while (origin_child_die && origin_child_die->tag) | |
11579 | { | |
11580 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 11581 | while (offsetp < offsets_end |
9c541725 | 11582 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 11583 | offsetp++; |
b64f50a1 | 11584 | if (offsetp >= offsets_end |
9c541725 | 11585 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 11586 | { |
adde2bff DE |
11587 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11588 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11589 | This can happen with mutually referenced abstract_origins. | |
11590 | PR 16581. */ | |
11591 | if (!origin_child_die->in_process) | |
11592 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11593 | } |
11594 | origin_child_die = sibling_die (origin_child_die); | |
11595 | } | |
cd02d79d | 11596 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11597 | } |
11598 | ||
c906108c | 11599 | static void |
e7c27a73 | 11600 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11601 | { |
e7c27a73 | 11602 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11603 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11604 | struct context_stack *newobj; |
c906108c SS |
11605 | CORE_ADDR lowpc; |
11606 | CORE_ADDR highpc; | |
11607 | struct die_info *child_die; | |
edb3359d | 11608 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11609 | const char *name; |
e142c38c | 11610 | CORE_ADDR baseaddr; |
801e3a5b | 11611 | struct block *block; |
edb3359d | 11612 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11613 | VEC (symbolp) *template_args = NULL; |
11614 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11615 | |
11616 | if (inlined_func) | |
11617 | { | |
11618 | /* If we do not have call site information, we can't show the | |
11619 | caller of this inlined function. That's too confusing, so | |
11620 | only use the scope for local variables. */ | |
11621 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11622 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11623 | if (call_line == NULL || call_file == NULL) | |
11624 | { | |
11625 | read_lexical_block_scope (die, cu); | |
11626 | return; | |
11627 | } | |
11628 | } | |
c906108c | 11629 | |
e142c38c DJ |
11630 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11631 | ||
94af9270 | 11632 | name = dwarf2_name (die, cu); |
c906108c | 11633 | |
e8d05480 JB |
11634 | /* Ignore functions with missing or empty names. These are actually |
11635 | illegal according to the DWARF standard. */ | |
11636 | if (name == NULL) | |
11637 | { | |
11638 | complaint (&symfile_complaints, | |
b64f50a1 | 11639 | _("missing name for subprogram DIE at %d"), |
9c541725 | 11640 | to_underlying (die->sect_off)); |
e8d05480 JB |
11641 | return; |
11642 | } | |
11643 | ||
11644 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 11645 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 11646 | <= PC_BOUNDS_INVALID) |
e8d05480 | 11647 | { |
ae4d0c03 PM |
11648 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11649 | if (!attr || !DW_UNSND (attr)) | |
11650 | complaint (&symfile_complaints, | |
3e43a32a MS |
11651 | _("cannot get low and high bounds " |
11652 | "for subprogram DIE at %d"), | |
9c541725 | 11653 | to_underlying (die->sect_off)); |
e8d05480 JB |
11654 | return; |
11655 | } | |
c906108c | 11656 | |
3e29f34a MR |
11657 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11658 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 11659 | |
34eaf542 TT |
11660 | /* If we have any template arguments, then we must allocate a |
11661 | different sort of symbol. */ | |
11662 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11663 | { | |
11664 | if (child_die->tag == DW_TAG_template_type_param | |
11665 | || child_die->tag == DW_TAG_template_value_param) | |
11666 | { | |
e623cf5d | 11667 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11668 | templ_func->base.is_cplus_template_function = 1; |
11669 | break; | |
11670 | } | |
11671 | } | |
11672 | ||
fe978cb0 PA |
11673 | newobj = push_context (0, lowpc); |
11674 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 11675 | (struct symbol *) templ_func); |
4c2df51b | 11676 | |
4cecd739 DJ |
11677 | /* If there is a location expression for DW_AT_frame_base, record |
11678 | it. */ | |
e142c38c | 11679 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11680 | if (attr) |
fe978cb0 | 11681 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 11682 | |
63e43d3a PMR |
11683 | /* If there is a location for the static link, record it. */ |
11684 | newobj->static_link = NULL; | |
11685 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
11686 | if (attr) | |
11687 | { | |
224c3ddb SM |
11688 | newobj->static_link |
11689 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
11690 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
11691 | } | |
11692 | ||
e142c38c | 11693 | cu->list_in_scope = &local_symbols; |
c906108c | 11694 | |
639d11d3 | 11695 | if (die->child != NULL) |
c906108c | 11696 | { |
639d11d3 | 11697 | child_die = die->child; |
c906108c SS |
11698 | while (child_die && child_die->tag) |
11699 | { | |
34eaf542 TT |
11700 | if (child_die->tag == DW_TAG_template_type_param |
11701 | || child_die->tag == DW_TAG_template_value_param) | |
11702 | { | |
11703 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11704 | ||
f1078f66 DJ |
11705 | if (arg != NULL) |
11706 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11707 | } |
11708 | else | |
11709 | process_die (child_die, cu); | |
c906108c SS |
11710 | child_die = sibling_die (child_die); |
11711 | } | |
11712 | } | |
11713 | ||
d389af10 JK |
11714 | inherit_abstract_dies (die, cu); |
11715 | ||
4a811a97 UW |
11716 | /* If we have a DW_AT_specification, we might need to import using |
11717 | directives from the context of the specification DIE. See the | |
11718 | comment in determine_prefix. */ | |
11719 | if (cu->language == language_cplus | |
11720 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11721 | { | |
11722 | struct dwarf2_cu *spec_cu = cu; | |
11723 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11724 | ||
11725 | while (spec_die) | |
11726 | { | |
11727 | child_die = spec_die->child; | |
11728 | while (child_die && child_die->tag) | |
11729 | { | |
11730 | if (child_die->tag == DW_TAG_imported_module) | |
11731 | process_die (child_die, spec_cu); | |
11732 | child_die = sibling_die (child_die); | |
11733 | } | |
11734 | ||
11735 | /* In some cases, GCC generates specification DIEs that | |
11736 | themselves contain DW_AT_specification attributes. */ | |
11737 | spec_die = die_specification (spec_die, &spec_cu); | |
11738 | } | |
11739 | } | |
11740 | ||
fe978cb0 | 11741 | newobj = pop_context (); |
c906108c | 11742 | /* Make a block for the local symbols within. */ |
fe978cb0 | 11743 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 11744 | newobj->static_link, lowpc, highpc); |
801e3a5b | 11745 | |
df8a16a1 | 11746 | /* For C++, set the block's scope. */ |
45280282 IB |
11747 | if ((cu->language == language_cplus |
11748 | || cu->language == language_fortran | |
c44af4eb TT |
11749 | || cu->language == language_d |
11750 | || cu->language == language_rust) | |
4d4ec4e5 | 11751 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11752 | block_set_scope (block, determine_prefix (die, cu), |
11753 | &objfile->objfile_obstack); | |
df8a16a1 | 11754 | |
801e3a5b JB |
11755 | /* If we have address ranges, record them. */ |
11756 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11757 | |
fe978cb0 | 11758 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 11759 | |
34eaf542 TT |
11760 | /* Attach template arguments to function. */ |
11761 | if (! VEC_empty (symbolp, template_args)) | |
11762 | { | |
11763 | gdb_assert (templ_func != NULL); | |
11764 | ||
11765 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11766 | templ_func->template_arguments | |
8d749320 SM |
11767 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
11768 | templ_func->n_template_arguments); | |
34eaf542 TT |
11769 | memcpy (templ_func->template_arguments, |
11770 | VEC_address (symbolp, template_args), | |
11771 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11772 | VEC_free (symbolp, template_args); | |
11773 | } | |
11774 | ||
208d8187 JB |
11775 | /* In C++, we can have functions nested inside functions (e.g., when |
11776 | a function declares a class that has methods). This means that | |
11777 | when we finish processing a function scope, we may need to go | |
11778 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 11779 | local_symbols = newobj->locals; |
22cee43f | 11780 | local_using_directives = newobj->local_using_directives; |
208d8187 | 11781 | |
921e78cf JB |
11782 | /* If we've finished processing a top-level function, subsequent |
11783 | symbols go in the file symbol list. */ | |
11784 | if (outermost_context_p ()) | |
e142c38c | 11785 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11786 | } |
11787 | ||
11788 | /* Process all the DIES contained within a lexical block scope. Start | |
11789 | a new scope, process the dies, and then close the scope. */ | |
11790 | ||
11791 | static void | |
e7c27a73 | 11792 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11793 | { |
e7c27a73 | 11794 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11795 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11796 | struct context_stack *newobj; |
c906108c SS |
11797 | CORE_ADDR lowpc, highpc; |
11798 | struct die_info *child_die; | |
e142c38c DJ |
11799 | CORE_ADDR baseaddr; |
11800 | ||
11801 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11802 | |
11803 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11804 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11805 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11806 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11807 | describe ranges. */ |
e385593e JK |
11808 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
11809 | { | |
11810 | case PC_BOUNDS_NOT_PRESENT: | |
11811 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
11812 | there was no wrapping by that DW_TAG_lexical_block. | |
11813 | GCC does no longer produces such DWARF since GCC r224161. */ | |
11814 | for (child_die = die->child; | |
11815 | child_die != NULL && child_die->tag; | |
11816 | child_die = sibling_die (child_die)) | |
11817 | process_die (child_die, cu); | |
11818 | return; | |
11819 | case PC_BOUNDS_INVALID: | |
11820 | return; | |
11821 | } | |
3e29f34a MR |
11822 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11823 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
11824 | |
11825 | push_context (0, lowpc); | |
639d11d3 | 11826 | if (die->child != NULL) |
c906108c | 11827 | { |
639d11d3 | 11828 | child_die = die->child; |
c906108c SS |
11829 | while (child_die && child_die->tag) |
11830 | { | |
e7c27a73 | 11831 | process_die (child_die, cu); |
c906108c SS |
11832 | child_die = sibling_die (child_die); |
11833 | } | |
11834 | } | |
3ea89b92 | 11835 | inherit_abstract_dies (die, cu); |
fe978cb0 | 11836 | newobj = pop_context (); |
c906108c | 11837 | |
22cee43f | 11838 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 11839 | { |
801e3a5b | 11840 | struct block *block |
63e43d3a | 11841 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 11842 | newobj->start_addr, highpc); |
801e3a5b JB |
11843 | |
11844 | /* Note that recording ranges after traversing children, as we | |
11845 | do here, means that recording a parent's ranges entails | |
11846 | walking across all its children's ranges as they appear in | |
11847 | the address map, which is quadratic behavior. | |
11848 | ||
11849 | It would be nicer to record the parent's ranges before | |
11850 | traversing its children, simply overriding whatever you find | |
11851 | there. But since we don't even decide whether to create a | |
11852 | block until after we've traversed its children, that's hard | |
11853 | to do. */ | |
11854 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 11855 | } |
fe978cb0 | 11856 | local_symbols = newobj->locals; |
22cee43f | 11857 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
11858 | } |
11859 | ||
216f72a1 | 11860 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
11861 | |
11862 | static void | |
11863 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11864 | { | |
11865 | struct objfile *objfile = cu->objfile; | |
11866 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11867 | CORE_ADDR pc, baseaddr; | |
11868 | struct attribute *attr; | |
11869 | struct call_site *call_site, call_site_local; | |
11870 | void **slot; | |
11871 | int nparams; | |
11872 | struct die_info *child_die; | |
11873 | ||
11874 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11875 | ||
216f72a1 JK |
11876 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
11877 | if (attr == NULL) | |
11878 | { | |
11879 | /* This was a pre-DWARF-5 GNU extension alias | |
11880 | for DW_AT_call_return_pc. */ | |
11881 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11882 | } | |
96408a79 SA |
11883 | if (!attr) |
11884 | { | |
11885 | complaint (&symfile_complaints, | |
216f72a1 | 11886 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 11887 | "DIE 0x%x [in module %s]"), |
9c541725 | 11888 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
11889 | return; |
11890 | } | |
31aa7e4e | 11891 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 11892 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
11893 | |
11894 | if (cu->call_site_htab == NULL) | |
11895 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11896 | NULL, &objfile->objfile_obstack, | |
11897 | hashtab_obstack_allocate, NULL); | |
11898 | call_site_local.pc = pc; | |
11899 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11900 | if (*slot != NULL) | |
11901 | { | |
11902 | complaint (&symfile_complaints, | |
216f72a1 | 11903 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 11904 | "DIE 0x%x [in module %s]"), |
9c541725 | 11905 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 11906 | objfile_name (objfile)); |
96408a79 SA |
11907 | return; |
11908 | } | |
11909 | ||
11910 | /* Count parameters at the caller. */ | |
11911 | ||
11912 | nparams = 0; | |
11913 | for (child_die = die->child; child_die && child_die->tag; | |
11914 | child_die = sibling_die (child_die)) | |
11915 | { | |
216f72a1 JK |
11916 | if (child_die->tag != DW_TAG_call_site_parameter |
11917 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
11918 | { |
11919 | complaint (&symfile_complaints, | |
216f72a1 JK |
11920 | _("Tag %d is not DW_TAG_call_site_parameter in " |
11921 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 11922 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 11923 | objfile_name (objfile)); |
96408a79 SA |
11924 | continue; |
11925 | } | |
11926 | ||
11927 | nparams++; | |
11928 | } | |
11929 | ||
224c3ddb SM |
11930 | call_site |
11931 | = ((struct call_site *) | |
11932 | obstack_alloc (&objfile->objfile_obstack, | |
11933 | sizeof (*call_site) | |
11934 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
11935 | *slot = call_site; |
11936 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11937 | call_site->pc = pc; | |
11938 | ||
216f72a1 JK |
11939 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
11940 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
11941 | { |
11942 | struct die_info *func_die; | |
11943 | ||
11944 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11945 | for (func_die = die->parent; | |
11946 | func_die && func_die->tag != DW_TAG_subprogram | |
11947 | && func_die->tag != DW_TAG_subroutine_type; | |
11948 | func_die = func_die->parent); | |
11949 | ||
216f72a1 JK |
11950 | /* DW_AT_call_all_calls is a superset |
11951 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 11952 | if (func_die |
216f72a1 | 11953 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 11954 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 11955 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
11956 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
11957 | { | |
11958 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
11959 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
11960 | both the initial caller containing the real return address PC and | |
11961 | the final callee containing the current PC of a chain of tail | |
11962 | calls do not need to have the tail call list complete. But any | |
11963 | function candidate for a virtual tail call frame searched via | |
11964 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
11965 | determined unambiguously. */ | |
11966 | } | |
11967 | else | |
11968 | { | |
11969 | struct type *func_type = NULL; | |
11970 | ||
11971 | if (func_die) | |
11972 | func_type = get_die_type (func_die, cu); | |
11973 | if (func_type != NULL) | |
11974 | { | |
11975 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
11976 | ||
11977 | /* Enlist this call site to the function. */ | |
11978 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
11979 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
11980 | } | |
11981 | else | |
11982 | complaint (&symfile_complaints, | |
216f72a1 | 11983 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 11984 | "DIE 0x%x [in module %s]"), |
9c541725 | 11985 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
11986 | } |
11987 | } | |
11988 | ||
216f72a1 JK |
11989 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
11990 | if (attr == NULL) | |
11991 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
11992 | if (attr == NULL) | |
11993 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 11994 | if (attr == NULL) |
216f72a1 JK |
11995 | { |
11996 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
11997 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11998 | } | |
96408a79 SA |
11999 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12000 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12001 | /* Keep NULL DWARF_BLOCK. */; | |
12002 | else if (attr_form_is_block (attr)) | |
12003 | { | |
12004 | struct dwarf2_locexpr_baton *dlbaton; | |
12005 | ||
8d749320 | 12006 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12007 | dlbaton->data = DW_BLOCK (attr)->data; |
12008 | dlbaton->size = DW_BLOCK (attr)->size; | |
12009 | dlbaton->per_cu = cu->per_cu; | |
12010 | ||
12011 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12012 | } | |
7771576e | 12013 | else if (attr_form_is_ref (attr)) |
96408a79 | 12014 | { |
96408a79 SA |
12015 | struct dwarf2_cu *target_cu = cu; |
12016 | struct die_info *target_die; | |
12017 | ||
ac9ec31b | 12018 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12019 | gdb_assert (target_cu->objfile == objfile); |
12020 | if (die_is_declaration (target_die, target_cu)) | |
12021 | { | |
7d45c7c3 | 12022 | const char *target_physname; |
9112db09 JK |
12023 | |
12024 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12025 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12026 | if (target_physname == NULL) |
9112db09 | 12027 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12028 | if (target_physname == NULL) |
12029 | complaint (&symfile_complaints, | |
216f72a1 | 12030 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12031 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12032 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12033 | else |
7d455152 | 12034 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12035 | } |
12036 | else | |
12037 | { | |
12038 | CORE_ADDR lowpc; | |
12039 | ||
12040 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12041 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12042 | <= PC_BOUNDS_INVALID) |
96408a79 | 12043 | complaint (&symfile_complaints, |
216f72a1 | 12044 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12045 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12046 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12047 | else |
3e29f34a MR |
12048 | { |
12049 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12050 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12051 | } | |
96408a79 SA |
12052 | } |
12053 | } | |
12054 | else | |
12055 | complaint (&symfile_complaints, | |
216f72a1 | 12056 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12057 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12058 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12059 | |
12060 | call_site->per_cu = cu->per_cu; | |
12061 | ||
12062 | for (child_die = die->child; | |
12063 | child_die && child_die->tag; | |
12064 | child_die = sibling_die (child_die)) | |
12065 | { | |
96408a79 | 12066 | struct call_site_parameter *parameter; |
1788b2d3 | 12067 | struct attribute *loc, *origin; |
96408a79 | 12068 | |
216f72a1 JK |
12069 | if (child_die->tag != DW_TAG_call_site_parameter |
12070 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12071 | { |
12072 | /* Already printed the complaint above. */ | |
12073 | continue; | |
12074 | } | |
12075 | ||
12076 | gdb_assert (call_site->parameter_count < nparams); | |
12077 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12078 | ||
1788b2d3 JK |
12079 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12080 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12081 | register is contained in DW_AT_call_value. */ |
96408a79 | 12082 | |
24c5c679 | 12083 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12084 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12085 | if (origin == NULL) | |
12086 | { | |
12087 | /* This was a pre-DWARF-5 GNU extension alias | |
12088 | for DW_AT_call_parameter. */ | |
12089 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12090 | } | |
7771576e | 12091 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12092 | { |
1788b2d3 | 12093 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12094 | |
12095 | sect_offset sect_off | |
12096 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12097 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12098 | { |
12099 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12100 | binding can be done only inside one CU. Such referenced DIE | |
12101 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12102 | complaint (&symfile_complaints, | |
216f72a1 JK |
12103 | _("DW_AT_call_parameter offset is not in CU for " |
12104 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12105 | to_underlying (child_die->sect_off), |
12106 | objfile_name (objfile)); | |
d76b7dbc JK |
12107 | continue; |
12108 | } | |
9c541725 PA |
12109 | parameter->u.param_cu_off |
12110 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12111 | } |
12112 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12113 | { |
12114 | complaint (&symfile_complaints, | |
12115 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12116 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12117 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12118 | continue; |
12119 | } | |
24c5c679 | 12120 | else |
96408a79 | 12121 | { |
24c5c679 JK |
12122 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12123 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12124 | if (parameter->u.dwarf_reg != -1) | |
12125 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
12126 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
12127 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
12128 | ¶meter->u.fb_offset)) | |
12129 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
12130 | else | |
12131 | { | |
12132 | complaint (&symfile_complaints, | |
12133 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
12134 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 12135 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 12136 | "[in module %s]"), |
9c541725 PA |
12137 | to_underlying (child_die->sect_off), |
12138 | objfile_name (objfile)); | |
24c5c679 JK |
12139 | continue; |
12140 | } | |
96408a79 SA |
12141 | } |
12142 | ||
216f72a1 JK |
12143 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
12144 | if (attr == NULL) | |
12145 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
12146 | if (!attr_form_is_block (attr)) |
12147 | { | |
12148 | complaint (&symfile_complaints, | |
216f72a1 JK |
12149 | _("No DW_FORM_block* DW_AT_call_value for " |
12150 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12151 | to_underlying (child_die->sect_off), |
12152 | objfile_name (objfile)); | |
96408a79 SA |
12153 | continue; |
12154 | } | |
12155 | parameter->value = DW_BLOCK (attr)->data; | |
12156 | parameter->value_size = DW_BLOCK (attr)->size; | |
12157 | ||
12158 | /* Parameters are not pre-cleared by memset above. */ | |
12159 | parameter->data_value = NULL; | |
12160 | parameter->data_value_size = 0; | |
12161 | call_site->parameter_count++; | |
12162 | ||
216f72a1 JK |
12163 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
12164 | if (attr == NULL) | |
12165 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
12166 | if (attr) |
12167 | { | |
12168 | if (!attr_form_is_block (attr)) | |
12169 | complaint (&symfile_complaints, | |
216f72a1 JK |
12170 | _("No DW_FORM_block* DW_AT_call_data_value for " |
12171 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12172 | to_underlying (child_die->sect_off), |
12173 | objfile_name (objfile)); | |
96408a79 SA |
12174 | else |
12175 | { | |
12176 | parameter->data_value = DW_BLOCK (attr)->data; | |
12177 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
12178 | } | |
12179 | } | |
12180 | } | |
12181 | } | |
12182 | ||
43988095 JK |
12183 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
12184 | reading .debug_rnglists. | |
12185 | Callback's type should be: | |
12186 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12187 | Return true if the attributes are present and valid, otherwise, | |
12188 | return false. */ | |
12189 | ||
12190 | template <typename Callback> | |
12191 | static bool | |
12192 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
12193 | Callback &&callback) | |
12194 | { | |
12195 | struct objfile *objfile = cu->objfile; | |
12196 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12197 | struct comp_unit_head *cu_header = &cu->header; | |
12198 | bfd *obfd = objfile->obfd; | |
12199 | unsigned int addr_size = cu_header->addr_size; | |
12200 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12201 | /* Base address selection entry. */ | |
12202 | CORE_ADDR base; | |
12203 | int found_base; | |
12204 | unsigned int dummy; | |
12205 | const gdb_byte *buffer; | |
12206 | CORE_ADDR low = 0; | |
12207 | CORE_ADDR high = 0; | |
12208 | CORE_ADDR baseaddr; | |
12209 | bool overflow = false; | |
12210 | ||
12211 | found_base = cu->base_known; | |
12212 | base = cu->base_address; | |
12213 | ||
12214 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
12215 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
12216 | { | |
12217 | complaint (&symfile_complaints, | |
12218 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12219 | offset); | |
12220 | return false; | |
12221 | } | |
12222 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
12223 | ||
12224 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12225 | ||
12226 | while (1) | |
12227 | { | |
7814882a JK |
12228 | /* Initialize it due to a false compiler warning. */ |
12229 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
12230 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
12231 | + dwarf2_per_objfile->rnglists.size); | |
12232 | unsigned int bytes_read; | |
12233 | ||
12234 | if (buffer == buf_end) | |
12235 | { | |
12236 | overflow = true; | |
12237 | break; | |
12238 | } | |
12239 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
12240 | switch (rlet) | |
12241 | { | |
12242 | case DW_RLE_end_of_list: | |
12243 | break; | |
12244 | case DW_RLE_base_address: | |
12245 | if (buffer + cu->header.addr_size > buf_end) | |
12246 | { | |
12247 | overflow = true; | |
12248 | break; | |
12249 | } | |
12250 | base = read_address (obfd, buffer, cu, &bytes_read); | |
12251 | found_base = 1; | |
12252 | buffer += bytes_read; | |
12253 | break; | |
12254 | case DW_RLE_start_length: | |
12255 | if (buffer + cu->header.addr_size > buf_end) | |
12256 | { | |
12257 | overflow = true; | |
12258 | break; | |
12259 | } | |
12260 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12261 | buffer += bytes_read; | |
12262 | range_end = (range_beginning | |
12263 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
12264 | buffer += bytes_read; | |
12265 | if (buffer > buf_end) | |
12266 | { | |
12267 | overflow = true; | |
12268 | break; | |
12269 | } | |
12270 | break; | |
12271 | case DW_RLE_offset_pair: | |
12272 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12273 | buffer += bytes_read; | |
12274 | if (buffer > buf_end) | |
12275 | { | |
12276 | overflow = true; | |
12277 | break; | |
12278 | } | |
12279 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12280 | buffer += bytes_read; | |
12281 | if (buffer > buf_end) | |
12282 | { | |
12283 | overflow = true; | |
12284 | break; | |
12285 | } | |
12286 | break; | |
12287 | case DW_RLE_start_end: | |
12288 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
12289 | { | |
12290 | overflow = true; | |
12291 | break; | |
12292 | } | |
12293 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12294 | buffer += bytes_read; | |
12295 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
12296 | buffer += bytes_read; | |
12297 | break; | |
12298 | default: | |
12299 | complaint (&symfile_complaints, | |
12300 | _("Invalid .debug_rnglists data (no base address)")); | |
12301 | return false; | |
12302 | } | |
12303 | if (rlet == DW_RLE_end_of_list || overflow) | |
12304 | break; | |
12305 | if (rlet == DW_RLE_base_address) | |
12306 | continue; | |
12307 | ||
12308 | if (!found_base) | |
12309 | { | |
12310 | /* We have no valid base address for the ranges | |
12311 | data. */ | |
12312 | complaint (&symfile_complaints, | |
12313 | _("Invalid .debug_rnglists data (no base address)")); | |
12314 | return false; | |
12315 | } | |
12316 | ||
12317 | if (range_beginning > range_end) | |
12318 | { | |
12319 | /* Inverted range entries are invalid. */ | |
12320 | complaint (&symfile_complaints, | |
12321 | _("Invalid .debug_rnglists data (inverted range)")); | |
12322 | return false; | |
12323 | } | |
12324 | ||
12325 | /* Empty range entries have no effect. */ | |
12326 | if (range_beginning == range_end) | |
12327 | continue; | |
12328 | ||
12329 | range_beginning += base; | |
12330 | range_end += base; | |
12331 | ||
12332 | /* A not-uncommon case of bad debug info. | |
12333 | Don't pollute the addrmap with bad data. */ | |
12334 | if (range_beginning + baseaddr == 0 | |
12335 | && !dwarf2_per_objfile->has_section_at_zero) | |
12336 | { | |
12337 | complaint (&symfile_complaints, | |
12338 | _(".debug_rnglists entry has start address of zero" | |
12339 | " [in module %s]"), objfile_name (objfile)); | |
12340 | continue; | |
12341 | } | |
12342 | ||
12343 | callback (range_beginning, range_end); | |
12344 | } | |
12345 | ||
12346 | if (overflow) | |
12347 | { | |
12348 | complaint (&symfile_complaints, | |
12349 | _("Offset %d is not terminated " | |
12350 | "for DW_AT_ranges attribute"), | |
12351 | offset); | |
12352 | return false; | |
12353 | } | |
12354 | ||
12355 | return true; | |
12356 | } | |
12357 | ||
12358 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
12359 | Callback's type should be: | |
12360 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 12361 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 12362 | |
43988095 | 12363 | template <typename Callback> |
43039443 | 12364 | static int |
5f46c5a5 | 12365 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 12366 | Callback &&callback) |
43039443 JK |
12367 | { |
12368 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 12369 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
12370 | struct comp_unit_head *cu_header = &cu->header; |
12371 | bfd *obfd = objfile->obfd; | |
12372 | unsigned int addr_size = cu_header->addr_size; | |
12373 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12374 | /* Base address selection entry. */ | |
12375 | CORE_ADDR base; | |
12376 | int found_base; | |
12377 | unsigned int dummy; | |
d521ce57 | 12378 | const gdb_byte *buffer; |
ff013f42 | 12379 | CORE_ADDR baseaddr; |
43039443 | 12380 | |
43988095 JK |
12381 | if (cu_header->version >= 5) |
12382 | return dwarf2_rnglists_process (offset, cu, callback); | |
12383 | ||
d00adf39 DE |
12384 | found_base = cu->base_known; |
12385 | base = cu->base_address; | |
43039443 | 12386 | |
be391dca | 12387 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12388 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
12389 | { |
12390 | complaint (&symfile_complaints, | |
12391 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12392 | offset); | |
12393 | return 0; | |
12394 | } | |
dce234bc | 12395 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 12396 | |
e7030f15 | 12397 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 12398 | |
43039443 JK |
12399 | while (1) |
12400 | { | |
12401 | CORE_ADDR range_beginning, range_end; | |
12402 | ||
12403 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
12404 | buffer += addr_size; | |
12405 | range_end = read_address (obfd, buffer, cu, &dummy); | |
12406 | buffer += addr_size; | |
12407 | offset += 2 * addr_size; | |
12408 | ||
12409 | /* An end of list marker is a pair of zero addresses. */ | |
12410 | if (range_beginning == 0 && range_end == 0) | |
12411 | /* Found the end of list entry. */ | |
12412 | break; | |
12413 | ||
12414 | /* Each base address selection entry is a pair of 2 values. | |
12415 | The first is the largest possible address, the second is | |
12416 | the base address. Check for a base address here. */ | |
12417 | if ((range_beginning & mask) == mask) | |
12418 | { | |
28d2bfb9 AB |
12419 | /* If we found the largest possible address, then we already |
12420 | have the base address in range_end. */ | |
12421 | base = range_end; | |
43039443 JK |
12422 | found_base = 1; |
12423 | continue; | |
12424 | } | |
12425 | ||
12426 | if (!found_base) | |
12427 | { | |
12428 | /* We have no valid base address for the ranges | |
12429 | data. */ | |
12430 | complaint (&symfile_complaints, | |
12431 | _("Invalid .debug_ranges data (no base address)")); | |
12432 | return 0; | |
12433 | } | |
12434 | ||
9277c30c UW |
12435 | if (range_beginning > range_end) |
12436 | { | |
12437 | /* Inverted range entries are invalid. */ | |
12438 | complaint (&symfile_complaints, | |
12439 | _("Invalid .debug_ranges data (inverted range)")); | |
12440 | return 0; | |
12441 | } | |
12442 | ||
12443 | /* Empty range entries have no effect. */ | |
12444 | if (range_beginning == range_end) | |
12445 | continue; | |
12446 | ||
43039443 JK |
12447 | range_beginning += base; |
12448 | range_end += base; | |
12449 | ||
01093045 DE |
12450 | /* A not-uncommon case of bad debug info. |
12451 | Don't pollute the addrmap with bad data. */ | |
12452 | if (range_beginning + baseaddr == 0 | |
12453 | && !dwarf2_per_objfile->has_section_at_zero) | |
12454 | { | |
12455 | complaint (&symfile_complaints, | |
12456 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12457 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12458 | continue; |
12459 | } | |
12460 | ||
5f46c5a5 JK |
12461 | callback (range_beginning, range_end); |
12462 | } | |
12463 | ||
12464 | return 1; | |
12465 | } | |
12466 | ||
12467 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
12468 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
12469 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
12470 | ||
12471 | static int | |
12472 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
12473 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
12474 | struct partial_symtab *ranges_pst) | |
12475 | { | |
12476 | struct objfile *objfile = cu->objfile; | |
12477 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12478 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
12479 | SECT_OFF_TEXT (objfile)); | |
12480 | int low_set = 0; | |
12481 | CORE_ADDR low = 0; | |
12482 | CORE_ADDR high = 0; | |
12483 | int retval; | |
12484 | ||
12485 | retval = dwarf2_ranges_process (offset, cu, | |
12486 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12487 | { | |
9277c30c | 12488 | if (ranges_pst != NULL) |
3e29f34a MR |
12489 | { |
12490 | CORE_ADDR lowpc; | |
12491 | CORE_ADDR highpc; | |
12492 | ||
12493 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12494 | range_beginning + baseaddr); | |
12495 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12496 | range_end + baseaddr); | |
12497 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
12498 | ranges_pst); | |
12499 | } | |
ff013f42 | 12500 | |
43039443 JK |
12501 | /* FIXME: This is recording everything as a low-high |
12502 | segment of consecutive addresses. We should have a | |
12503 | data structure for discontiguous block ranges | |
12504 | instead. */ | |
12505 | if (! low_set) | |
12506 | { | |
12507 | low = range_beginning; | |
12508 | high = range_end; | |
12509 | low_set = 1; | |
12510 | } | |
12511 | else | |
12512 | { | |
12513 | if (range_beginning < low) | |
12514 | low = range_beginning; | |
12515 | if (range_end > high) | |
12516 | high = range_end; | |
12517 | } | |
5f46c5a5 JK |
12518 | }); |
12519 | if (!retval) | |
12520 | return 0; | |
43039443 JK |
12521 | |
12522 | if (! low_set) | |
12523 | /* If the first entry is an end-of-list marker, the range | |
12524 | describes an empty scope, i.e. no instructions. */ | |
12525 | return 0; | |
12526 | ||
12527 | if (low_return) | |
12528 | *low_return = low; | |
12529 | if (high_return) | |
12530 | *high_return = high; | |
12531 | return 1; | |
12532 | } | |
12533 | ||
3a2b436a JK |
12534 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
12535 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 12536 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 12537 | |
3a2b436a | 12538 | static enum pc_bounds_kind |
af34e669 | 12539 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
12540 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
12541 | struct partial_symtab *pst) | |
c906108c SS |
12542 | { |
12543 | struct attribute *attr; | |
91da1414 | 12544 | struct attribute *attr_high; |
af34e669 DJ |
12545 | CORE_ADDR low = 0; |
12546 | CORE_ADDR high = 0; | |
e385593e | 12547 | enum pc_bounds_kind ret; |
c906108c | 12548 | |
91da1414 MW |
12549 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12550 | if (attr_high) | |
af34e669 | 12551 | { |
e142c38c | 12552 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 12553 | if (attr) |
91da1414 | 12554 | { |
31aa7e4e JB |
12555 | low = attr_value_as_address (attr); |
12556 | high = attr_value_as_address (attr_high); | |
12557 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12558 | high += low; | |
91da1414 | 12559 | } |
af34e669 DJ |
12560 | else |
12561 | /* Found high w/o low attribute. */ | |
e385593e | 12562 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
12563 | |
12564 | /* Found consecutive range of addresses. */ | |
3a2b436a | 12565 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 12566 | } |
c906108c | 12567 | else |
af34e669 | 12568 | { |
e142c38c | 12569 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
12570 | if (attr != NULL) |
12571 | { | |
ab435259 DE |
12572 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12573 | We take advantage of the fact that DW_AT_ranges does not appear | |
12574 | in DW_TAG_compile_unit of DWO files. */ | |
12575 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
12576 | unsigned int ranges_offset = (DW_UNSND (attr) | |
12577 | + (need_ranges_base | |
12578 | ? cu->ranges_base | |
12579 | : 0)); | |
2e3cf129 | 12580 | |
af34e669 | 12581 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 12582 | .debug_ranges section. */ |
2e3cf129 | 12583 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 12584 | return PC_BOUNDS_INVALID; |
43039443 | 12585 | /* Found discontinuous range of addresses. */ |
3a2b436a | 12586 | ret = PC_BOUNDS_RANGES; |
af34e669 | 12587 | } |
e385593e JK |
12588 | else |
12589 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 12590 | } |
c906108c | 12591 | |
9373cf26 JK |
12592 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
12593 | if (high <= low) | |
e385593e | 12594 | return PC_BOUNDS_INVALID; |
c906108c SS |
12595 | |
12596 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
12597 | eliminate duplicate copies of functions and vtables and such. | |
12598 | The linker will arbitrarily choose one and discard the others. | |
12599 | The AT_*_pc values for such functions refer to local labels in | |
12600 | these sections. If the section from that file was discarded, the | |
12601 | labels are not in the output, so the relocs get a value of 0. | |
12602 | If this is a discarded function, mark the pc bounds as invalid, | |
12603 | so that GDB will ignore it. */ | |
72dca2f5 | 12604 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 12605 | return PC_BOUNDS_INVALID; |
c906108c SS |
12606 | |
12607 | *lowpc = low; | |
96408a79 SA |
12608 | if (highpc) |
12609 | *highpc = high; | |
af34e669 | 12610 | return ret; |
c906108c SS |
12611 | } |
12612 | ||
b084d499 JB |
12613 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
12614 | its low and high PC addresses. Do nothing if these addresses could not | |
12615 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
12616 | and HIGHPC to the high address if greater than HIGHPC. */ | |
12617 | ||
12618 | static void | |
12619 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
12620 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12621 | struct dwarf2_cu *cu) | |
12622 | { | |
12623 | CORE_ADDR low, high; | |
12624 | struct die_info *child = die->child; | |
12625 | ||
e385593e | 12626 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 12627 | { |
325fac50 PA |
12628 | *lowpc = std::min (*lowpc, low); |
12629 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
12630 | } |
12631 | ||
12632 | /* If the language does not allow nested subprograms (either inside | |
12633 | subprograms or lexical blocks), we're done. */ | |
12634 | if (cu->language != language_ada) | |
12635 | return; | |
6e70227d | 12636 | |
b084d499 JB |
12637 | /* Check all the children of the given DIE. If it contains nested |
12638 | subprograms, then check their pc bounds. Likewise, we need to | |
12639 | check lexical blocks as well, as they may also contain subprogram | |
12640 | definitions. */ | |
12641 | while (child && child->tag) | |
12642 | { | |
12643 | if (child->tag == DW_TAG_subprogram | |
12644 | || child->tag == DW_TAG_lexical_block) | |
12645 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
12646 | child = sibling_die (child); | |
12647 | } | |
12648 | } | |
12649 | ||
fae299cd DC |
12650 | /* Get the low and high pc's represented by the scope DIE, and store |
12651 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
12652 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
12653 | ||
12654 | static void | |
12655 | get_scope_pc_bounds (struct die_info *die, | |
12656 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12657 | struct dwarf2_cu *cu) | |
12658 | { | |
12659 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
12660 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
12661 | CORE_ADDR current_low, current_high; | |
12662 | ||
3a2b436a | 12663 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 12664 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
12665 | { |
12666 | best_low = current_low; | |
12667 | best_high = current_high; | |
12668 | } | |
12669 | else | |
12670 | { | |
12671 | struct die_info *child = die->child; | |
12672 | ||
12673 | while (child && child->tag) | |
12674 | { | |
12675 | switch (child->tag) { | |
12676 | case DW_TAG_subprogram: | |
b084d499 | 12677 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
12678 | break; |
12679 | case DW_TAG_namespace: | |
f55ee35c | 12680 | case DW_TAG_module: |
fae299cd DC |
12681 | /* FIXME: carlton/2004-01-16: Should we do this for |
12682 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
12683 | that current GCC's always emit the DIEs corresponding | |
12684 | to definitions of methods of classes as children of a | |
12685 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
12686 | the DIEs giving the declarations, which could be | |
12687 | anywhere). But I don't see any reason why the | |
12688 | standards says that they have to be there. */ | |
12689 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
12690 | ||
12691 | if (current_low != ((CORE_ADDR) -1)) | |
12692 | { | |
325fac50 PA |
12693 | best_low = std::min (best_low, current_low); |
12694 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
12695 | } |
12696 | break; | |
12697 | default: | |
0963b4bd | 12698 | /* Ignore. */ |
fae299cd DC |
12699 | break; |
12700 | } | |
12701 | ||
12702 | child = sibling_die (child); | |
12703 | } | |
12704 | } | |
12705 | ||
12706 | *lowpc = best_low; | |
12707 | *highpc = best_high; | |
12708 | } | |
12709 | ||
801e3a5b JB |
12710 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
12711 | in DIE. */ | |
380bca97 | 12712 | |
801e3a5b JB |
12713 | static void |
12714 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
12715 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
12716 | { | |
bb5ed363 | 12717 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12718 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 12719 | struct attribute *attr; |
91da1414 | 12720 | struct attribute *attr_high; |
801e3a5b | 12721 | |
91da1414 MW |
12722 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12723 | if (attr_high) | |
801e3a5b | 12724 | { |
801e3a5b JB |
12725 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
12726 | if (attr) | |
12727 | { | |
31aa7e4e JB |
12728 | CORE_ADDR low = attr_value_as_address (attr); |
12729 | CORE_ADDR high = attr_value_as_address (attr_high); | |
12730 | ||
12731 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12732 | high += low; | |
9a619af0 | 12733 | |
3e29f34a MR |
12734 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
12735 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
12736 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
12737 | } |
12738 | } | |
12739 | ||
12740 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
12741 | if (attr) | |
12742 | { | |
bb5ed363 | 12743 | bfd *obfd = objfile->obfd; |
ab435259 DE |
12744 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12745 | We take advantage of the fact that DW_AT_ranges does not appear | |
12746 | in DW_TAG_compile_unit of DWO files. */ | |
12747 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
12748 | |
12749 | /* The value of the DW_AT_ranges attribute is the offset of the | |
12750 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
12751 | unsigned long offset = (DW_UNSND (attr) |
12752 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 12753 | const gdb_byte *buffer; |
801e3a5b JB |
12754 | |
12755 | /* For some target architectures, but not others, the | |
12756 | read_address function sign-extends the addresses it returns. | |
12757 | To recognize base address selection entries, we need a | |
12758 | mask. */ | |
12759 | unsigned int addr_size = cu->header.addr_size; | |
12760 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12761 | ||
12762 | /* The base address, to which the next pair is relative. Note | |
12763 | that this 'base' is a DWARF concept: most entries in a range | |
12764 | list are relative, to reduce the number of relocs against the | |
12765 | debugging information. This is separate from this function's | |
12766 | 'baseaddr' argument, which GDB uses to relocate debugging | |
12767 | information from a shared library based on the address at | |
12768 | which the library was loaded. */ | |
d00adf39 DE |
12769 | CORE_ADDR base = cu->base_address; |
12770 | int base_known = cu->base_known; | |
801e3a5b | 12771 | |
5f46c5a5 JK |
12772 | dwarf2_ranges_process (offset, cu, |
12773 | [&] (CORE_ADDR start, CORE_ADDR end) | |
12774 | { | |
58fdfd2c JK |
12775 | start += baseaddr; |
12776 | end += baseaddr; | |
5f46c5a5 JK |
12777 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
12778 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
12779 | record_block_range (block, start, end - 1); | |
12780 | }); | |
801e3a5b JB |
12781 | } |
12782 | } | |
12783 | ||
685b1105 JK |
12784 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12785 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12786 | |
685b1105 JK |
12787 | static void |
12788 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 12789 | { |
38360086 | 12790 | int major, minor; |
60d5a603 JK |
12791 | |
12792 | if (cu->producer == NULL) | |
12793 | { | |
12794 | /* For unknown compilers expect their behavior is DWARF version | |
12795 | compliant. | |
12796 | ||
12797 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12798 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12799 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12800 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12801 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12802 | } |
b1ffba5a | 12803 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 12804 | { |
38360086 MW |
12805 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
12806 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 12807 | } |
5230b05a WT |
12808 | else if (producer_is_icc (cu->producer, &major, &minor)) |
12809 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
12810 | else |
12811 | { | |
12812 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12813 | compliant. */ | |
60d5a603 JK |
12814 | } |
12815 | ||
ba919b58 | 12816 | cu->checked_producer = 1; |
685b1105 | 12817 | } |
ba919b58 | 12818 | |
685b1105 JK |
12819 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12820 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12821 | during 4.6.0 experimental. */ | |
12822 | ||
12823 | static int | |
12824 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12825 | { | |
12826 | if (!cu->checked_producer) | |
12827 | check_producer (cu); | |
12828 | ||
12829 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12830 | } |
12831 | ||
12832 | /* Return the default accessibility type if it is not overriden by | |
12833 | DW_AT_accessibility. */ | |
12834 | ||
12835 | static enum dwarf_access_attribute | |
12836 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12837 | { | |
12838 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12839 | { | |
12840 | /* The default DWARF 2 accessibility for members is public, the default | |
12841 | accessibility for inheritance is private. */ | |
12842 | ||
12843 | if (die->tag != DW_TAG_inheritance) | |
12844 | return DW_ACCESS_public; | |
12845 | else | |
12846 | return DW_ACCESS_private; | |
12847 | } | |
12848 | else | |
12849 | { | |
12850 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12851 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12852 | depends on the container kind. */ | |
12853 | ||
12854 | if (die->parent->tag == DW_TAG_class_type) | |
12855 | return DW_ACCESS_private; | |
12856 | else | |
12857 | return DW_ACCESS_public; | |
12858 | } | |
12859 | } | |
12860 | ||
74ac6d43 TT |
12861 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12862 | offset. If the attribute was not found return 0, otherwise return | |
12863 | 1. If it was found but could not properly be handled, set *OFFSET | |
12864 | to 0. */ | |
12865 | ||
12866 | static int | |
12867 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12868 | LONGEST *offset) | |
12869 | { | |
12870 | struct attribute *attr; | |
12871 | ||
12872 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12873 | if (attr != NULL) | |
12874 | { | |
12875 | *offset = 0; | |
12876 | ||
12877 | /* Note that we do not check for a section offset first here. | |
12878 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12879 | so if we see it, we can assume that a constant form is really | |
12880 | a constant and not a section offset. */ | |
12881 | if (attr_form_is_constant (attr)) | |
12882 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12883 | else if (attr_form_is_section_offset (attr)) | |
12884 | dwarf2_complex_location_expr_complaint (); | |
12885 | else if (attr_form_is_block (attr)) | |
12886 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12887 | else | |
12888 | dwarf2_complex_location_expr_complaint (); | |
12889 | ||
12890 | return 1; | |
12891 | } | |
12892 | ||
12893 | return 0; | |
12894 | } | |
12895 | ||
c906108c SS |
12896 | /* Add an aggregate field to the field list. */ |
12897 | ||
12898 | static void | |
107d2387 | 12899 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12900 | struct dwarf2_cu *cu) |
6e70227d | 12901 | { |
e7c27a73 | 12902 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12903 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12904 | struct nextfield *new_field; |
12905 | struct attribute *attr; | |
12906 | struct field *fp; | |
15d034d0 | 12907 | const char *fieldname = ""; |
c906108c SS |
12908 | |
12909 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12910 | new_field = XNEW (struct nextfield); |
b8c9b27d | 12911 | make_cleanup (xfree, new_field); |
c906108c | 12912 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12913 | |
12914 | if (die->tag == DW_TAG_inheritance) | |
12915 | { | |
12916 | new_field->next = fip->baseclasses; | |
12917 | fip->baseclasses = new_field; | |
12918 | } | |
12919 | else | |
12920 | { | |
12921 | new_field->next = fip->fields; | |
12922 | fip->fields = new_field; | |
12923 | } | |
c906108c SS |
12924 | fip->nfields++; |
12925 | ||
e142c38c | 12926 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12927 | if (attr) |
12928 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12929 | else |
12930 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12931 | if (new_field->accessibility != DW_ACCESS_public) |
12932 | fip->non_public_fields = 1; | |
60d5a603 | 12933 | |
e142c38c | 12934 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12935 | if (attr) |
12936 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12937 | else |
12938 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12939 | |
12940 | fp = &new_field->field; | |
a9a9bd0f | 12941 | |
e142c38c | 12942 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12943 | { |
74ac6d43 TT |
12944 | LONGEST offset; |
12945 | ||
a9a9bd0f | 12946 | /* Data member other than a C++ static data member. */ |
6e70227d | 12947 | |
c906108c | 12948 | /* Get type of field. */ |
e7c27a73 | 12949 | fp->type = die_type (die, cu); |
c906108c | 12950 | |
d6a843b5 | 12951 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12952 | |
c906108c | 12953 | /* Get bit size of field (zero if none). */ |
e142c38c | 12954 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
12955 | if (attr) |
12956 | { | |
12957 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
12958 | } | |
12959 | else | |
12960 | { | |
12961 | FIELD_BITSIZE (*fp) = 0; | |
12962 | } | |
12963 | ||
12964 | /* Get bit offset of field. */ | |
74ac6d43 TT |
12965 | if (handle_data_member_location (die, cu, &offset)) |
12966 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 12967 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
12968 | if (attr) |
12969 | { | |
5e2b427d | 12970 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
12971 | { |
12972 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
12973 | additional bit offset from the MSB of the containing |
12974 | anonymous object to the MSB of the field. We don't | |
12975 | have to do anything special since we don't need to | |
12976 | know the size of the anonymous object. */ | |
f41f5e61 | 12977 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
12978 | } |
12979 | else | |
12980 | { | |
12981 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
12982 | MSB of the anonymous object, subtract off the number of |
12983 | bits from the MSB of the field to the MSB of the | |
12984 | object, and then subtract off the number of bits of | |
12985 | the field itself. The result is the bit offset of | |
12986 | the LSB of the field. */ | |
c906108c SS |
12987 | int anonymous_size; |
12988 | int bit_offset = DW_UNSND (attr); | |
12989 | ||
e142c38c | 12990 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12991 | if (attr) |
12992 | { | |
12993 | /* The size of the anonymous object containing | |
12994 | the bit field is explicit, so use the | |
12995 | indicated size (in bytes). */ | |
12996 | anonymous_size = DW_UNSND (attr); | |
12997 | } | |
12998 | else | |
12999 | { | |
13000 | /* The size of the anonymous object containing | |
13001 | the bit field must be inferred from the type | |
13002 | attribute of the data member containing the | |
13003 | bit field. */ | |
13004 | anonymous_size = TYPE_LENGTH (fp->type); | |
13005 | } | |
f41f5e61 PA |
13006 | SET_FIELD_BITPOS (*fp, |
13007 | (FIELD_BITPOS (*fp) | |
13008 | + anonymous_size * bits_per_byte | |
13009 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13010 | } |
13011 | } | |
da5b30da AA |
13012 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13013 | if (attr != NULL) | |
13014 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13015 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13016 | |
13017 | /* Get name of field. */ | |
39cbfefa DJ |
13018 | fieldname = dwarf2_name (die, cu); |
13019 | if (fieldname == NULL) | |
13020 | fieldname = ""; | |
d8151005 DJ |
13021 | |
13022 | /* The name is already allocated along with this objfile, so we don't | |
13023 | need to duplicate it for the type. */ | |
13024 | fp->name = fieldname; | |
c906108c SS |
13025 | |
13026 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13027 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13028 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13029 | { |
d48cc9dd | 13030 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13031 | new_field->accessibility = DW_ACCESS_private; |
13032 | fip->non_public_fields = 1; | |
13033 | } | |
13034 | } | |
a9a9bd0f | 13035 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13036 | { |
a9a9bd0f DC |
13037 | /* C++ static member. */ |
13038 | ||
13039 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13040 | is a declaration, but all versions of G++ as of this writing | |
13041 | (so through at least 3.2.1) incorrectly generate | |
13042 | DW_TAG_variable tags. */ | |
6e70227d | 13043 | |
ff355380 | 13044 | const char *physname; |
c906108c | 13045 | |
a9a9bd0f | 13046 | /* Get name of field. */ |
39cbfefa DJ |
13047 | fieldname = dwarf2_name (die, cu); |
13048 | if (fieldname == NULL) | |
c906108c SS |
13049 | return; |
13050 | ||
254e6b9e | 13051 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13052 | if (attr |
13053 | /* Only create a symbol if this is an external value. | |
13054 | new_symbol checks this and puts the value in the global symbol | |
13055 | table, which we want. If it is not external, new_symbol | |
13056 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13057 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13058 | { |
13059 | /* A static const member, not much different than an enum as far as | |
13060 | we're concerned, except that we can support more types. */ | |
13061 | new_symbol (die, NULL, cu); | |
13062 | } | |
13063 | ||
2df3850c | 13064 | /* Get physical name. */ |
ff355380 | 13065 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13066 | |
d8151005 DJ |
13067 | /* The name is already allocated along with this objfile, so we don't |
13068 | need to duplicate it for the type. */ | |
13069 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13070 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13071 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13072 | } |
13073 | else if (die->tag == DW_TAG_inheritance) | |
13074 | { | |
74ac6d43 | 13075 | LONGEST offset; |
d4b96c9a | 13076 | |
74ac6d43 TT |
13077 | /* C++ base class field. */ |
13078 | if (handle_data_member_location (die, cu, &offset)) | |
13079 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 13080 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 13081 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
13082 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
13083 | fip->nbaseclasses++; | |
13084 | } | |
13085 | } | |
13086 | ||
98751a41 JK |
13087 | /* Add a typedef defined in the scope of the FIP's class. */ |
13088 | ||
13089 | static void | |
13090 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
13091 | struct dwarf2_cu *cu) | |
6e70227d | 13092 | { |
98751a41 | 13093 | struct typedef_field_list *new_field; |
98751a41 | 13094 | struct typedef_field *fp; |
98751a41 JK |
13095 | |
13096 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13097 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
13098 | make_cleanup (xfree, new_field); |
13099 | ||
13100 | gdb_assert (die->tag == DW_TAG_typedef); | |
13101 | ||
13102 | fp = &new_field->field; | |
13103 | ||
13104 | /* Get name of field. */ | |
13105 | fp->name = dwarf2_name (die, cu); | |
13106 | if (fp->name == NULL) | |
13107 | return; | |
13108 | ||
13109 | fp->type = read_type_die (die, cu); | |
13110 | ||
c191a687 KS |
13111 | /* Save accessibility. */ |
13112 | enum dwarf_access_attribute accessibility; | |
13113 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
13114 | if (attr != NULL) | |
13115 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
13116 | else | |
13117 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13118 | switch (accessibility) | |
13119 | { | |
13120 | case DW_ACCESS_public: | |
13121 | /* The assumed value if neither private nor protected. */ | |
13122 | break; | |
13123 | case DW_ACCESS_private: | |
13124 | fp->is_private = 1; | |
13125 | break; | |
13126 | case DW_ACCESS_protected: | |
13127 | fp->is_protected = 1; | |
13128 | break; | |
13129 | default: | |
37534686 KS |
13130 | complaint (&symfile_complaints, |
13131 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); | |
c191a687 KS |
13132 | } |
13133 | ||
98751a41 JK |
13134 | new_field->next = fip->typedef_field_list; |
13135 | fip->typedef_field_list = new_field; | |
13136 | fip->typedef_field_list_count++; | |
13137 | } | |
13138 | ||
c906108c SS |
13139 | /* Create the vector of fields, and attach it to the type. */ |
13140 | ||
13141 | static void | |
fba45db2 | 13142 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13143 | struct dwarf2_cu *cu) |
c906108c SS |
13144 | { |
13145 | int nfields = fip->nfields; | |
13146 | ||
13147 | /* Record the field count, allocate space for the array of fields, | |
13148 | and create blank accessibility bitfields if necessary. */ | |
13149 | TYPE_NFIELDS (type) = nfields; | |
13150 | TYPE_FIELDS (type) = (struct field *) | |
13151 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
13152 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
13153 | ||
b4ba55a1 | 13154 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
13155 | { |
13156 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13157 | ||
13158 | TYPE_FIELD_PRIVATE_BITS (type) = | |
13159 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13160 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
13161 | ||
13162 | TYPE_FIELD_PROTECTED_BITS (type) = | |
13163 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13164 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
13165 | ||
774b6a14 TT |
13166 | TYPE_FIELD_IGNORE_BITS (type) = |
13167 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13168 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
13169 | } |
13170 | ||
13171 | /* If the type has baseclasses, allocate and clear a bit vector for | |
13172 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 13173 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
13174 | { |
13175 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 13176 | unsigned char *pointer; |
c906108c SS |
13177 | |
13178 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 13179 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 13180 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
13181 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
13182 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
13183 | } | |
13184 | ||
3e43a32a MS |
13185 | /* Copy the saved-up fields into the field vector. Start from the head of |
13186 | the list, adding to the tail of the field array, so that they end up in | |
13187 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
13188 | while (nfields-- > 0) |
13189 | { | |
7d0ccb61 DJ |
13190 | struct nextfield *fieldp; |
13191 | ||
13192 | if (fip->fields) | |
13193 | { | |
13194 | fieldp = fip->fields; | |
13195 | fip->fields = fieldp->next; | |
13196 | } | |
13197 | else | |
13198 | { | |
13199 | fieldp = fip->baseclasses; | |
13200 | fip->baseclasses = fieldp->next; | |
13201 | } | |
13202 | ||
13203 | TYPE_FIELD (type, nfields) = fieldp->field; | |
13204 | switch (fieldp->accessibility) | |
c906108c | 13205 | { |
c5aa993b | 13206 | case DW_ACCESS_private: |
b4ba55a1 JB |
13207 | if (cu->language != language_ada) |
13208 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 13209 | break; |
c906108c | 13210 | |
c5aa993b | 13211 | case DW_ACCESS_protected: |
b4ba55a1 JB |
13212 | if (cu->language != language_ada) |
13213 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 13214 | break; |
c906108c | 13215 | |
c5aa993b JM |
13216 | case DW_ACCESS_public: |
13217 | break; | |
c906108c | 13218 | |
c5aa993b JM |
13219 | default: |
13220 | /* Unknown accessibility. Complain and treat it as public. */ | |
13221 | { | |
e2e0b3e5 | 13222 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 13223 | fieldp->accessibility); |
c5aa993b JM |
13224 | } |
13225 | break; | |
c906108c SS |
13226 | } |
13227 | if (nfields < fip->nbaseclasses) | |
13228 | { | |
7d0ccb61 | 13229 | switch (fieldp->virtuality) |
c906108c | 13230 | { |
c5aa993b JM |
13231 | case DW_VIRTUALITY_virtual: |
13232 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 13233 | if (cu->language == language_ada) |
a73c6dcd | 13234 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
13235 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
13236 | break; | |
c906108c SS |
13237 | } |
13238 | } | |
c906108c SS |
13239 | } |
13240 | } | |
13241 | ||
7d27a96d TT |
13242 | /* Return true if this member function is a constructor, false |
13243 | otherwise. */ | |
13244 | ||
13245 | static int | |
13246 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
13247 | { | |
13248 | const char *fieldname; | |
fe978cb0 | 13249 | const char *type_name; |
7d27a96d TT |
13250 | int len; |
13251 | ||
13252 | if (die->parent == NULL) | |
13253 | return 0; | |
13254 | ||
13255 | if (die->parent->tag != DW_TAG_structure_type | |
13256 | && die->parent->tag != DW_TAG_union_type | |
13257 | && die->parent->tag != DW_TAG_class_type) | |
13258 | return 0; | |
13259 | ||
13260 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
13261 | type_name = dwarf2_name (die->parent, cu); |
13262 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
13263 | return 0; |
13264 | ||
13265 | len = strlen (fieldname); | |
fe978cb0 PA |
13266 | return (strncmp (fieldname, type_name, len) == 0 |
13267 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
13268 | } |
13269 | ||
c906108c SS |
13270 | /* Add a member function to the proper fieldlist. */ |
13271 | ||
13272 | static void | |
107d2387 | 13273 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13274 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 13275 | { |
e7c27a73 | 13276 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13277 | struct attribute *attr; |
13278 | struct fnfieldlist *flp; | |
13279 | int i; | |
13280 | struct fn_field *fnp; | |
15d034d0 | 13281 | const char *fieldname; |
c906108c | 13282 | struct nextfnfield *new_fnfield; |
f792889a | 13283 | struct type *this_type; |
60d5a603 | 13284 | enum dwarf_access_attribute accessibility; |
c906108c | 13285 | |
b4ba55a1 | 13286 | if (cu->language == language_ada) |
a73c6dcd | 13287 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 13288 | |
2df3850c | 13289 | /* Get name of member function. */ |
39cbfefa DJ |
13290 | fieldname = dwarf2_name (die, cu); |
13291 | if (fieldname == NULL) | |
2df3850c | 13292 | return; |
c906108c | 13293 | |
c906108c SS |
13294 | /* Look up member function name in fieldlist. */ |
13295 | for (i = 0; i < fip->nfnfields; i++) | |
13296 | { | |
27bfe10e | 13297 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
13298 | break; |
13299 | } | |
13300 | ||
13301 | /* Create new list element if necessary. */ | |
13302 | if (i < fip->nfnfields) | |
13303 | flp = &fip->fnfieldlists[i]; | |
13304 | else | |
13305 | { | |
13306 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13307 | { | |
13308 | fip->fnfieldlists = (struct fnfieldlist *) | |
13309 | xrealloc (fip->fnfieldlists, | |
13310 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13311 | * sizeof (struct fnfieldlist)); |
c906108c | 13312 | if (fip->nfnfields == 0) |
c13c43fd | 13313 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
13314 | } |
13315 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
13316 | flp->name = fieldname; | |
13317 | flp->length = 0; | |
13318 | flp->head = NULL; | |
3da10d80 | 13319 | i = fip->nfnfields++; |
c906108c SS |
13320 | } |
13321 | ||
13322 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 13323 | entry. */ |
8d749320 | 13324 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 13325 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
13326 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
13327 | new_fnfield->next = flp->head; | |
13328 | flp->head = new_fnfield; | |
13329 | flp->length++; | |
13330 | ||
13331 | /* Fill in the member function field info. */ | |
13332 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
13333 | |
13334 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 13335 | if (cu->language == language_cplus) |
3da10d80 KS |
13336 | { |
13337 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
13338 | die, cu); | |
13339 | } | |
13340 | else | |
13341 | { | |
1d06ead6 | 13342 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
13343 | fnp->physname = physname ? physname : ""; |
13344 | } | |
13345 | ||
c906108c | 13346 | fnp->type = alloc_type (objfile); |
f792889a DJ |
13347 | this_type = read_type_die (die, cu); |
13348 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 13349 | { |
f792889a | 13350 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 13351 | |
f792889a | 13352 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
13353 | of the method itself (TYPE_CODE_METHOD). */ |
13354 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
13355 | TYPE_TARGET_TYPE (this_type), |
13356 | TYPE_FIELDS (this_type), | |
13357 | TYPE_NFIELDS (this_type), | |
13358 | TYPE_VARARGS (this_type)); | |
c906108c SS |
13359 | |
13360 | /* Handle static member functions. | |
c5aa993b | 13361 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
13362 | member functions. G++ helps GDB by marking the first |
13363 | parameter for non-static member functions (which is the this | |
13364 | pointer) as artificial. We obtain this information from | |
13365 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 13366 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
13367 | fnp->voffset = VOFFSET_STATIC; |
13368 | } | |
13369 | else | |
e2e0b3e5 | 13370 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 13371 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
13372 | |
13373 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 13374 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 13375 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 13376 | |
3e43a32a MS |
13377 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
13378 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
13379 | |
13380 | /* Get accessibility. */ | |
e142c38c | 13381 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 13382 | if (attr) |
aead7601 | 13383 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
13384 | else |
13385 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13386 | switch (accessibility) | |
c906108c | 13387 | { |
60d5a603 JK |
13388 | case DW_ACCESS_private: |
13389 | fnp->is_private = 1; | |
13390 | break; | |
13391 | case DW_ACCESS_protected: | |
13392 | fnp->is_protected = 1; | |
13393 | break; | |
c906108c SS |
13394 | } |
13395 | ||
b02dede2 | 13396 | /* Check for artificial methods. */ |
e142c38c | 13397 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
13398 | if (attr && DW_UNSND (attr) != 0) |
13399 | fnp->is_artificial = 1; | |
13400 | ||
7d27a96d TT |
13401 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
13402 | ||
0d564a31 | 13403 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
13404 | function. For older versions of GCC, this is an offset in the |
13405 | appropriate virtual table, as specified by DW_AT_containing_type. | |
13406 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
13407 | to the object address. */ |
13408 | ||
e142c38c | 13409 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 13410 | if (attr) |
8e19ed76 | 13411 | { |
aec5aa8b | 13412 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 13413 | { |
aec5aa8b TT |
13414 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
13415 | { | |
13416 | /* Old-style GCC. */ | |
13417 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
13418 | } | |
13419 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
13420 | || (DW_BLOCK (attr)->size > 1 | |
13421 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
13422 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
13423 | { | |
aec5aa8b TT |
13424 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
13425 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
13426 | dwarf2_complex_location_expr_complaint (); | |
13427 | else | |
13428 | fnp->voffset /= cu->header.addr_size; | |
13429 | fnp->voffset += 2; | |
13430 | } | |
13431 | else | |
13432 | dwarf2_complex_location_expr_complaint (); | |
13433 | ||
13434 | if (!fnp->fcontext) | |
7e993ebf KS |
13435 | { |
13436 | /* If there is no `this' field and no DW_AT_containing_type, | |
13437 | we cannot actually find a base class context for the | |
13438 | vtable! */ | |
13439 | if (TYPE_NFIELDS (this_type) == 0 | |
13440 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
13441 | { | |
13442 | complaint (&symfile_complaints, | |
13443 | _("cannot determine context for virtual member " | |
13444 | "function \"%s\" (offset %d)"), | |
9c541725 | 13445 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
13446 | } |
13447 | else | |
13448 | { | |
13449 | fnp->fcontext | |
13450 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
13451 | } | |
13452 | } | |
aec5aa8b | 13453 | } |
3690dd37 | 13454 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 13455 | { |
4d3c2250 | 13456 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13457 | } |
13458 | else | |
13459 | { | |
4d3c2250 KB |
13460 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
13461 | fieldname); | |
8e19ed76 | 13462 | } |
0d564a31 | 13463 | } |
d48cc9dd DJ |
13464 | else |
13465 | { | |
13466 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
13467 | if (attr && DW_UNSND (attr)) | |
13468 | { | |
13469 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
13470 | complaint (&symfile_complaints, | |
3e43a32a MS |
13471 | _("Member function \"%s\" (offset %d) is virtual " |
13472 | "but the vtable offset is not specified"), | |
9c541725 | 13473 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 13474 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
13475 | TYPE_CPLUS_DYNAMIC (type) = 1; |
13476 | } | |
13477 | } | |
c906108c SS |
13478 | } |
13479 | ||
13480 | /* Create the vector of member function fields, and attach it to the type. */ | |
13481 | ||
13482 | static void | |
fba45db2 | 13483 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13484 | struct dwarf2_cu *cu) |
c906108c SS |
13485 | { |
13486 | struct fnfieldlist *flp; | |
c906108c SS |
13487 | int i; |
13488 | ||
b4ba55a1 | 13489 | if (cu->language == language_ada) |
a73c6dcd | 13490 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 13491 | |
c906108c SS |
13492 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
13493 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
13494 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
13495 | ||
13496 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
13497 | { | |
13498 | struct nextfnfield *nfp = flp->head; | |
13499 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
13500 | int k; | |
13501 | ||
13502 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
13503 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
13504 | fn_flp->fn_fields = (struct fn_field *) | |
13505 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
13506 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 13507 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
13508 | } |
13509 | ||
13510 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
13511 | } |
13512 | ||
1168df01 JB |
13513 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
13514 | language, zero otherwise. */ | |
13515 | static int | |
13516 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
13517 | { | |
13518 | static const char vptr[] = "_vptr"; | |
987504bb | 13519 | static const char vtable[] = "vtable"; |
1168df01 | 13520 | |
9c37b5ae TT |
13521 | /* Look for the C++ form of the vtable. */ |
13522 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
13523 | return 1; |
13524 | ||
13525 | return 0; | |
13526 | } | |
13527 | ||
c0dd20ea | 13528 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
13529 | functions, with the ABI-specified layout. If TYPE describes |
13530 | such a structure, smash it into a member function type. | |
61049d3b DJ |
13531 | |
13532 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
13533 | This is GCC PR debug/28767. */ | |
c0dd20ea | 13534 | |
0b92b5bb TT |
13535 | static void |
13536 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 13537 | { |
09e2d7c7 | 13538 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
13539 | |
13540 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
13541 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
13542 | return; | |
c0dd20ea DJ |
13543 | |
13544 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
13545 | if (TYPE_FIELD_NAME (type, 0) == NULL |
13546 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
13547 | || TYPE_FIELD_NAME (type, 1) == NULL | |
13548 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
13549 | return; | |
c0dd20ea DJ |
13550 | |
13551 | /* Find the type of the method. */ | |
0b92b5bb | 13552 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
13553 | if (pfn_type == NULL |
13554 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
13555 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 13556 | return; |
c0dd20ea DJ |
13557 | |
13558 | /* Look for the "this" argument. */ | |
13559 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
13560 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 13561 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 13562 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 13563 | return; |
c0dd20ea | 13564 | |
09e2d7c7 | 13565 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 13566 | new_type = alloc_type (objfile); |
09e2d7c7 | 13567 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
13568 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
13569 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 13570 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 13571 | } |
1168df01 | 13572 | |
685b1105 | 13573 | |
c906108c | 13574 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
13575 | (definition) to create a type for the structure or union. Fill in |
13576 | the type's name and general properties; the members will not be | |
83655187 DE |
13577 | processed until process_structure_scope. A symbol table entry for |
13578 | the type will also not be done until process_structure_scope (assuming | |
13579 | the type has a name). | |
c906108c | 13580 | |
c767944b DJ |
13581 | NOTE: we need to call these functions regardless of whether or not the |
13582 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 13583 | structure or union. This gets the type entered into our set of |
83655187 | 13584 | user defined types. */ |
c906108c | 13585 | |
f792889a | 13586 | static struct type * |
134d01f1 | 13587 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13588 | { |
e7c27a73 | 13589 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13590 | struct type *type; |
13591 | struct attribute *attr; | |
15d034d0 | 13592 | const char *name; |
c906108c | 13593 | |
348e048f DE |
13594 | /* If the definition of this type lives in .debug_types, read that type. |
13595 | Don't follow DW_AT_specification though, that will take us back up | |
13596 | the chain and we want to go down. */ | |
45e58e77 | 13597 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13598 | if (attr) |
13599 | { | |
ac9ec31b | 13600 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13601 | |
ac9ec31b | 13602 | /* The type's CU may not be the same as CU. |
02142a6c | 13603 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13604 | return set_die_type (die, type, cu); |
13605 | } | |
13606 | ||
c0dd20ea | 13607 | type = alloc_type (objfile); |
c906108c | 13608 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 13609 | |
39cbfefa DJ |
13610 | name = dwarf2_name (die, cu); |
13611 | if (name != NULL) | |
c906108c | 13612 | { |
987504bb | 13613 | if (cu->language == language_cplus |
c44af4eb TT |
13614 | || cu->language == language_d |
13615 | || cu->language == language_rust) | |
63d06c5c | 13616 | { |
15d034d0 | 13617 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
13618 | |
13619 | /* dwarf2_full_name might have already finished building the DIE's | |
13620 | type. If so, there is no need to continue. */ | |
13621 | if (get_die_type (die, cu) != NULL) | |
13622 | return get_die_type (die, cu); | |
13623 | ||
13624 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
13625 | if (die->tag == DW_TAG_structure_type |
13626 | || die->tag == DW_TAG_class_type) | |
13627 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
13628 | } |
13629 | else | |
13630 | { | |
d8151005 DJ |
13631 | /* The name is already allocated along with this objfile, so |
13632 | we don't need to duplicate it for the type. */ | |
7d455152 | 13633 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
13634 | if (die->tag == DW_TAG_class_type) |
13635 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 13636 | } |
c906108c SS |
13637 | } |
13638 | ||
13639 | if (die->tag == DW_TAG_structure_type) | |
13640 | { | |
13641 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
13642 | } | |
13643 | else if (die->tag == DW_TAG_union_type) | |
13644 | { | |
13645 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
13646 | } | |
13647 | else | |
13648 | { | |
4753d33b | 13649 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
13650 | } |
13651 | ||
0cc2414c TT |
13652 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
13653 | TYPE_DECLARED_CLASS (type) = 1; | |
13654 | ||
e142c38c | 13655 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13656 | if (attr) |
13657 | { | |
155bfbd3 JB |
13658 | if (attr_form_is_constant (attr)) |
13659 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13660 | else | |
13661 | { | |
13662 | /* For the moment, dynamic type sizes are not supported | |
13663 | by GDB's struct type. The actual size is determined | |
13664 | on-demand when resolving the type of a given object, | |
13665 | so set the type's length to zero for now. Otherwise, | |
13666 | we record an expression as the length, and that expression | |
13667 | could lead to a very large value, which could eventually | |
13668 | lead to us trying to allocate that much memory when creating | |
13669 | a value of that type. */ | |
13670 | TYPE_LENGTH (type) = 0; | |
13671 | } | |
c906108c SS |
13672 | } |
13673 | else | |
13674 | { | |
13675 | TYPE_LENGTH (type) = 0; | |
13676 | } | |
13677 | ||
5230b05a | 13678 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 13679 | { |
5230b05a WT |
13680 | /* ICC<14 does not output the required DW_AT_declaration on |
13681 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 13682 | TYPE_STUB (type) = 1; |
685b1105 JK |
13683 | } |
13684 | else | |
13685 | TYPE_STUB_SUPPORTED (type) = 1; | |
13686 | ||
dc718098 | 13687 | if (die_is_declaration (die, cu)) |
876cecd0 | 13688 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
13689 | else if (attr == NULL && die->child == NULL |
13690 | && producer_is_realview (cu->producer)) | |
13691 | /* RealView does not output the required DW_AT_declaration | |
13692 | on incomplete types. */ | |
13693 | TYPE_STUB (type) = 1; | |
dc718098 | 13694 | |
c906108c SS |
13695 | /* We need to add the type field to the die immediately so we don't |
13696 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 13697 | type within the structure itself. */ |
1c379e20 | 13698 | set_die_type (die, type, cu); |
c906108c | 13699 | |
7e314c57 JK |
13700 | /* set_die_type should be already done. */ |
13701 | set_descriptive_type (type, die, cu); | |
13702 | ||
c767944b DJ |
13703 | return type; |
13704 | } | |
13705 | ||
13706 | /* Finish creating a structure or union type, including filling in | |
13707 | its members and creating a symbol for it. */ | |
13708 | ||
13709 | static void | |
13710 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13711 | { | |
13712 | struct objfile *objfile = cu->objfile; | |
ca040673 | 13713 | struct die_info *child_die; |
c767944b DJ |
13714 | struct type *type; |
13715 | ||
13716 | type = get_die_type (die, cu); | |
13717 | if (type == NULL) | |
13718 | type = read_structure_type (die, cu); | |
13719 | ||
e142c38c | 13720 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
13721 | { |
13722 | struct field_info fi; | |
34eaf542 | 13723 | VEC (symbolp) *template_args = NULL; |
c767944b | 13724 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
13725 | |
13726 | memset (&fi, 0, sizeof (struct field_info)); | |
13727 | ||
639d11d3 | 13728 | child_die = die->child; |
c906108c SS |
13729 | |
13730 | while (child_die && child_die->tag) | |
13731 | { | |
a9a9bd0f DC |
13732 | if (child_die->tag == DW_TAG_member |
13733 | || child_die->tag == DW_TAG_variable) | |
c906108c | 13734 | { |
a9a9bd0f DC |
13735 | /* NOTE: carlton/2002-11-05: A C++ static data member |
13736 | should be a DW_TAG_member that is a declaration, but | |
13737 | all versions of G++ as of this writing (so through at | |
13738 | least 3.2.1) incorrectly generate DW_TAG_variable | |
13739 | tags for them instead. */ | |
e7c27a73 | 13740 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13741 | } |
8713b1b1 | 13742 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 13743 | { |
e98c9e7c TT |
13744 | /* Rust doesn't have member functions in the C++ sense. |
13745 | However, it does emit ordinary functions as children | |
13746 | of a struct DIE. */ | |
13747 | if (cu->language == language_rust) | |
13748 | read_func_scope (child_die, cu); | |
13749 | else | |
13750 | { | |
13751 | /* C++ member function. */ | |
13752 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
13753 | } | |
c906108c SS |
13754 | } |
13755 | else if (child_die->tag == DW_TAG_inheritance) | |
13756 | { | |
13757 | /* C++ base class field. */ | |
e7c27a73 | 13758 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13759 | } |
98751a41 JK |
13760 | else if (child_die->tag == DW_TAG_typedef) |
13761 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
13762 | else if (child_die->tag == DW_TAG_template_type_param |
13763 | || child_die->tag == DW_TAG_template_value_param) | |
13764 | { | |
13765 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13766 | ||
f1078f66 DJ |
13767 | if (arg != NULL) |
13768 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
13769 | } |
13770 | ||
c906108c SS |
13771 | child_die = sibling_die (child_die); |
13772 | } | |
13773 | ||
34eaf542 TT |
13774 | /* Attach template arguments to type. */ |
13775 | if (! VEC_empty (symbolp, template_args)) | |
13776 | { | |
13777 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13778 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13779 | = VEC_length (symbolp, template_args); | |
13780 | TYPE_TEMPLATE_ARGUMENTS (type) | |
8d749320 SM |
13781 | = XOBNEWVEC (&objfile->objfile_obstack, |
13782 | struct symbol *, | |
13783 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 TT |
13784 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
13785 | VEC_address (symbolp, template_args), | |
13786 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13787 | * sizeof (struct symbol *))); | |
13788 | VEC_free (symbolp, template_args); | |
13789 | } | |
13790 | ||
c906108c SS |
13791 | /* Attach fields and member functions to the type. */ |
13792 | if (fi.nfields) | |
e7c27a73 | 13793 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13794 | if (fi.nfnfields) |
13795 | { | |
e7c27a73 | 13796 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13797 | |
c5aa993b | 13798 | /* Get the type which refers to the base class (possibly this |
c906108c | 13799 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13800 | class from the DW_AT_containing_type attribute. This use of |
13801 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13802 | |
e142c38c | 13803 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13804 | { |
e7c27a73 | 13805 | struct type *t = die_containing_type (die, cu); |
c906108c | 13806 | |
ae6ae975 | 13807 | set_type_vptr_basetype (type, t); |
c906108c SS |
13808 | if (type == t) |
13809 | { | |
c906108c SS |
13810 | int i; |
13811 | ||
13812 | /* Our own class provides vtbl ptr. */ | |
13813 | for (i = TYPE_NFIELDS (t) - 1; | |
13814 | i >= TYPE_N_BASECLASSES (t); | |
13815 | --i) | |
13816 | { | |
0d5cff50 | 13817 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13818 | |
1168df01 | 13819 | if (is_vtable_name (fieldname, cu)) |
c906108c | 13820 | { |
ae6ae975 | 13821 | set_type_vptr_fieldno (type, i); |
c906108c SS |
13822 | break; |
13823 | } | |
13824 | } | |
13825 | ||
13826 | /* Complain if virtual function table field not found. */ | |
13827 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13828 | complaint (&symfile_complaints, |
3e43a32a MS |
13829 | _("virtual function table pointer " |
13830 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13831 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13832 | ""); | |
c906108c SS |
13833 | } |
13834 | else | |
13835 | { | |
ae6ae975 | 13836 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
13837 | } |
13838 | } | |
f6235d4c | 13839 | else if (cu->producer |
61012eef | 13840 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
13841 | { |
13842 | /* The IBM XLC compiler does not provide direct indication | |
13843 | of the containing type, but the vtable pointer is | |
13844 | always named __vfp. */ | |
13845 | ||
13846 | int i; | |
13847 | ||
13848 | for (i = TYPE_NFIELDS (type) - 1; | |
13849 | i >= TYPE_N_BASECLASSES (type); | |
13850 | --i) | |
13851 | { | |
13852 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13853 | { | |
ae6ae975 DE |
13854 | set_type_vptr_fieldno (type, i); |
13855 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
13856 | break; |
13857 | } | |
13858 | } | |
13859 | } | |
c906108c | 13860 | } |
98751a41 JK |
13861 | |
13862 | /* Copy fi.typedef_field_list linked list elements content into the | |
13863 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13864 | if (fi.typedef_field_list) | |
13865 | { | |
13866 | int i = fi.typedef_field_list_count; | |
13867 | ||
a0d7a4ff | 13868 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 13869 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
13870 | = ((struct typedef_field *) |
13871 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
13872 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
13873 | ||
13874 | /* Reverse the list order to keep the debug info elements order. */ | |
13875 | while (--i >= 0) | |
13876 | { | |
13877 | struct typedef_field *dest, *src; | |
6e70227d | 13878 | |
98751a41 JK |
13879 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13880 | src = &fi.typedef_field_list->field; | |
13881 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13882 | *dest = *src; | |
13883 | } | |
13884 | } | |
c767944b DJ |
13885 | |
13886 | do_cleanups (back_to); | |
c906108c | 13887 | } |
63d06c5c | 13888 | |
bb5ed363 | 13889 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13890 | |
90aeadfc DC |
13891 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13892 | snapshots) has been known to create a die giving a declaration | |
13893 | for a class that has, as a child, a die giving a definition for a | |
13894 | nested class. So we have to process our children even if the | |
13895 | current die is a declaration. Normally, of course, a declaration | |
13896 | won't have any children at all. */ | |
134d01f1 | 13897 | |
ca040673 DE |
13898 | child_die = die->child; |
13899 | ||
90aeadfc DC |
13900 | while (child_die != NULL && child_die->tag) |
13901 | { | |
13902 | if (child_die->tag == DW_TAG_member | |
13903 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13904 | || child_die->tag == DW_TAG_inheritance |
13905 | || child_die->tag == DW_TAG_template_value_param | |
13906 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13907 | { |
90aeadfc | 13908 | /* Do nothing. */ |
134d01f1 | 13909 | } |
90aeadfc DC |
13910 | else |
13911 | process_die (child_die, cu); | |
134d01f1 | 13912 | |
90aeadfc | 13913 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13914 | } |
13915 | ||
fa4028e9 JB |
13916 | /* Do not consider external references. According to the DWARF standard, |
13917 | these DIEs are identified by the fact that they have no byte_size | |
13918 | attribute, and a declaration attribute. */ | |
13919 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13920 | || !die_is_declaration (die, cu)) | |
c767944b | 13921 | new_symbol (die, type, cu); |
134d01f1 DJ |
13922 | } |
13923 | ||
55426c9d JB |
13924 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13925 | update TYPE using some information only available in DIE's children. */ | |
13926 | ||
13927 | static void | |
13928 | update_enumeration_type_from_children (struct die_info *die, | |
13929 | struct type *type, | |
13930 | struct dwarf2_cu *cu) | |
13931 | { | |
60f7655a | 13932 | struct die_info *child_die; |
55426c9d JB |
13933 | int unsigned_enum = 1; |
13934 | int flag_enum = 1; | |
13935 | ULONGEST mask = 0; | |
55426c9d | 13936 | |
8268c778 | 13937 | auto_obstack obstack; |
55426c9d | 13938 | |
60f7655a DE |
13939 | for (child_die = die->child; |
13940 | child_die != NULL && child_die->tag; | |
13941 | child_die = sibling_die (child_die)) | |
55426c9d JB |
13942 | { |
13943 | struct attribute *attr; | |
13944 | LONGEST value; | |
13945 | const gdb_byte *bytes; | |
13946 | struct dwarf2_locexpr_baton *baton; | |
13947 | const char *name; | |
60f7655a | 13948 | |
55426c9d JB |
13949 | if (child_die->tag != DW_TAG_enumerator) |
13950 | continue; | |
13951 | ||
13952 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13953 | if (attr == NULL) | |
13954 | continue; | |
13955 | ||
13956 | name = dwarf2_name (child_die, cu); | |
13957 | if (name == NULL) | |
13958 | name = "<anonymous enumerator>"; | |
13959 | ||
13960 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13961 | &value, &bytes, &baton); | |
13962 | if (value < 0) | |
13963 | { | |
13964 | unsigned_enum = 0; | |
13965 | flag_enum = 0; | |
13966 | } | |
13967 | else if ((mask & value) != 0) | |
13968 | flag_enum = 0; | |
13969 | else | |
13970 | mask |= value; | |
13971 | ||
13972 | /* If we already know that the enum type is neither unsigned, nor | |
13973 | a flag type, no need to look at the rest of the enumerates. */ | |
13974 | if (!unsigned_enum && !flag_enum) | |
13975 | break; | |
55426c9d JB |
13976 | } |
13977 | ||
13978 | if (unsigned_enum) | |
13979 | TYPE_UNSIGNED (type) = 1; | |
13980 | if (flag_enum) | |
13981 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
13982 | } |
13983 | ||
134d01f1 DJ |
13984 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
13985 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 13986 | |
f792889a | 13987 | static struct type * |
134d01f1 | 13988 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13989 | { |
e7c27a73 | 13990 | struct objfile *objfile = cu->objfile; |
c906108c | 13991 | struct type *type; |
c906108c | 13992 | struct attribute *attr; |
0114d602 | 13993 | const char *name; |
134d01f1 | 13994 | |
348e048f DE |
13995 | /* If the definition of this type lives in .debug_types, read that type. |
13996 | Don't follow DW_AT_specification though, that will take us back up | |
13997 | the chain and we want to go down. */ | |
45e58e77 | 13998 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13999 | if (attr) |
14000 | { | |
ac9ec31b | 14001 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14002 | |
ac9ec31b | 14003 | /* The type's CU may not be the same as CU. |
02142a6c | 14004 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14005 | return set_die_type (die, type, cu); |
14006 | } | |
14007 | ||
c906108c SS |
14008 | type = alloc_type (objfile); |
14009 | ||
14010 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14011 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14012 | if (name != NULL) |
7d455152 | 14013 | TYPE_TAG_NAME (type) = name; |
c906108c | 14014 | |
0626fc76 TT |
14015 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14016 | if (attr != NULL) | |
14017 | { | |
14018 | struct type *underlying_type = die_type (die, cu); | |
14019 | ||
14020 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14021 | } | |
14022 | ||
e142c38c | 14023 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14024 | if (attr) |
14025 | { | |
14026 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14027 | } | |
14028 | else | |
14029 | { | |
14030 | TYPE_LENGTH (type) = 0; | |
14031 | } | |
14032 | ||
137033e9 JB |
14033 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14034 | declared as private in the package spec, and then defined only | |
14035 | inside the package body. Such types are known as Taft Amendment | |
14036 | Types. When another package uses such a type, an incomplete DIE | |
14037 | may be generated by the compiler. */ | |
02eb380e | 14038 | if (die_is_declaration (die, cu)) |
876cecd0 | 14039 | TYPE_STUB (type) = 1; |
02eb380e | 14040 | |
0626fc76 TT |
14041 | /* Finish the creation of this type by using the enum's children. |
14042 | We must call this even when the underlying type has been provided | |
14043 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14044 | update_enumeration_type_from_children (die, type, cu); |
14045 | ||
0626fc76 TT |
14046 | /* If this type has an underlying type that is not a stub, then we |
14047 | may use its attributes. We always use the "unsigned" attribute | |
14048 | in this situation, because ordinarily we guess whether the type | |
14049 | is unsigned -- but the guess can be wrong and the underlying type | |
14050 | can tell us the reality. However, we defer to a local size | |
14051 | attribute if one exists, because this lets the compiler override | |
14052 | the underlying type if needed. */ | |
14053 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14054 | { | |
14055 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14056 | if (TYPE_LENGTH (type) == 0) | |
14057 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14058 | } | |
14059 | ||
3d567982 TT |
14060 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14061 | ||
f792889a | 14062 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14063 | } |
14064 | ||
14065 | /* Given a pointer to a die which begins an enumeration, process all | |
14066 | the dies that define the members of the enumeration, and create the | |
14067 | symbol for the enumeration type. | |
14068 | ||
14069 | NOTE: We reverse the order of the element list. */ | |
14070 | ||
14071 | static void | |
14072 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14073 | { | |
f792889a | 14074 | struct type *this_type; |
134d01f1 | 14075 | |
f792889a DJ |
14076 | this_type = get_die_type (die, cu); |
14077 | if (this_type == NULL) | |
14078 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 14079 | |
639d11d3 | 14080 | if (die->child != NULL) |
c906108c | 14081 | { |
9dc481d3 DE |
14082 | struct die_info *child_die; |
14083 | struct symbol *sym; | |
14084 | struct field *fields = NULL; | |
14085 | int num_fields = 0; | |
15d034d0 | 14086 | const char *name; |
9dc481d3 | 14087 | |
639d11d3 | 14088 | child_die = die->child; |
c906108c SS |
14089 | while (child_die && child_die->tag) |
14090 | { | |
14091 | if (child_die->tag != DW_TAG_enumerator) | |
14092 | { | |
e7c27a73 | 14093 | process_die (child_die, cu); |
c906108c SS |
14094 | } |
14095 | else | |
14096 | { | |
39cbfefa DJ |
14097 | name = dwarf2_name (child_die, cu); |
14098 | if (name) | |
c906108c | 14099 | { |
f792889a | 14100 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
14101 | |
14102 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14103 | { | |
14104 | fields = (struct field *) | |
14105 | xrealloc (fields, | |
14106 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14107 | * sizeof (struct field)); |
c906108c SS |
14108 | } |
14109 | ||
3567439c | 14110 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 14111 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 14112 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
14113 | FIELD_BITSIZE (fields[num_fields]) = 0; |
14114 | ||
14115 | num_fields++; | |
14116 | } | |
14117 | } | |
14118 | ||
14119 | child_die = sibling_die (child_die); | |
14120 | } | |
14121 | ||
14122 | if (num_fields) | |
14123 | { | |
f792889a DJ |
14124 | TYPE_NFIELDS (this_type) = num_fields; |
14125 | TYPE_FIELDS (this_type) = (struct field *) | |
14126 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
14127 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 14128 | sizeof (struct field) * num_fields); |
b8c9b27d | 14129 | xfree (fields); |
c906108c | 14130 | } |
c906108c | 14131 | } |
134d01f1 | 14132 | |
6c83ed52 TT |
14133 | /* If we are reading an enum from a .debug_types unit, and the enum |
14134 | is a declaration, and the enum is not the signatured type in the | |
14135 | unit, then we do not want to add a symbol for it. Adding a | |
14136 | symbol would in some cases obscure the true definition of the | |
14137 | enum, giving users an incomplete type when the definition is | |
14138 | actually available. Note that we do not want to do this for all | |
14139 | enums which are just declarations, because C++0x allows forward | |
14140 | enum declarations. */ | |
3019eac3 | 14141 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
14142 | && die_is_declaration (die, cu)) |
14143 | { | |
52dc124a | 14144 | struct signatured_type *sig_type; |
6c83ed52 | 14145 | |
c0f78cd4 | 14146 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
14147 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
14148 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
14149 | return; |
14150 | } | |
14151 | ||
f792889a | 14152 | new_symbol (die, this_type, cu); |
c906108c SS |
14153 | } |
14154 | ||
14155 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
14156 | the DIE's type field. For now, this only handles one dimensional | |
14157 | arrays. */ | |
14158 | ||
f792889a | 14159 | static struct type * |
e7c27a73 | 14160 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14161 | { |
e7c27a73 | 14162 | struct objfile *objfile = cu->objfile; |
c906108c | 14163 | struct die_info *child_die; |
7e314c57 | 14164 | struct type *type; |
c906108c | 14165 | struct type *element_type, *range_type, *index_type; |
c906108c | 14166 | struct attribute *attr; |
15d034d0 | 14167 | const char *name; |
dc53a7ad | 14168 | unsigned int bit_stride = 0; |
c906108c | 14169 | |
e7c27a73 | 14170 | element_type = die_type (die, cu); |
c906108c | 14171 | |
7e314c57 JK |
14172 | /* The die_type call above may have already set the type for this DIE. */ |
14173 | type = get_die_type (die, cu); | |
14174 | if (type) | |
14175 | return type; | |
14176 | ||
dc53a7ad JB |
14177 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
14178 | if (attr != NULL) | |
14179 | bit_stride = DW_UNSND (attr) * 8; | |
14180 | ||
14181 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
14182 | if (attr != NULL) | |
14183 | bit_stride = DW_UNSND (attr); | |
14184 | ||
c906108c SS |
14185 | /* Irix 6.2 native cc creates array types without children for |
14186 | arrays with unspecified length. */ | |
639d11d3 | 14187 | if (die->child == NULL) |
c906108c | 14188 | { |
46bf5051 | 14189 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14190 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
14191 | type = create_array_type_with_stride (NULL, element_type, range_type, |
14192 | bit_stride); | |
f792889a | 14193 | return set_die_type (die, type, cu); |
c906108c SS |
14194 | } |
14195 | ||
791afaa2 | 14196 | std::vector<struct type *> range_types; |
639d11d3 | 14197 | child_die = die->child; |
c906108c SS |
14198 | while (child_die && child_die->tag) |
14199 | { | |
14200 | if (child_die->tag == DW_TAG_subrange_type) | |
14201 | { | |
f792889a | 14202 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 14203 | |
f792889a | 14204 | if (child_type != NULL) |
a02abb62 | 14205 | { |
0963b4bd MS |
14206 | /* The range type was succesfully read. Save it for the |
14207 | array type creation. */ | |
791afaa2 | 14208 | range_types.push_back (child_type); |
a02abb62 | 14209 | } |
c906108c SS |
14210 | } |
14211 | child_die = sibling_die (child_die); | |
14212 | } | |
14213 | ||
14214 | /* Dwarf2 dimensions are output from left to right, create the | |
14215 | necessary array types in backwards order. */ | |
7ca2d3a3 | 14216 | |
c906108c | 14217 | type = element_type; |
7ca2d3a3 DL |
14218 | |
14219 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
14220 | { | |
14221 | int i = 0; | |
9a619af0 | 14222 | |
791afaa2 | 14223 | while (i < range_types.size ()) |
dc53a7ad JB |
14224 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
14225 | bit_stride); | |
7ca2d3a3 DL |
14226 | } |
14227 | else | |
14228 | { | |
791afaa2 | 14229 | size_t ndim = range_types.size (); |
7ca2d3a3 | 14230 | while (ndim-- > 0) |
dc53a7ad JB |
14231 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
14232 | bit_stride); | |
7ca2d3a3 | 14233 | } |
c906108c | 14234 | |
f5f8a009 EZ |
14235 | /* Understand Dwarf2 support for vector types (like they occur on |
14236 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
14237 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
14238 | custom vendor extension. The main difference between a regular | |
14239 | array and the vector variant is that vectors are passed by value | |
14240 | to functions. */ | |
e142c38c | 14241 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 14242 | if (attr) |
ea37ba09 | 14243 | make_vector_type (type); |
f5f8a009 | 14244 | |
dbc98a8b KW |
14245 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
14246 | implementation may choose to implement triple vectors using this | |
14247 | attribute. */ | |
14248 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
14249 | if (attr) | |
14250 | { | |
14251 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
14252 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14253 | else | |
3e43a32a MS |
14254 | complaint (&symfile_complaints, |
14255 | _("DW_AT_byte_size for array type smaller " | |
14256 | "than the total size of elements")); | |
dbc98a8b KW |
14257 | } |
14258 | ||
39cbfefa DJ |
14259 | name = dwarf2_name (die, cu); |
14260 | if (name) | |
14261 | TYPE_NAME (type) = name; | |
6e70227d | 14262 | |
0963b4bd | 14263 | /* Install the type in the die. */ |
7e314c57 JK |
14264 | set_die_type (die, type, cu); |
14265 | ||
14266 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14267 | set_descriptive_type (type, die, cu); |
14268 | ||
7e314c57 | 14269 | return type; |
c906108c SS |
14270 | } |
14271 | ||
7ca2d3a3 | 14272 | static enum dwarf_array_dim_ordering |
6e70227d | 14273 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
14274 | { |
14275 | struct attribute *attr; | |
14276 | ||
14277 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
14278 | ||
aead7601 SM |
14279 | if (attr) |
14280 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 14281 | |
0963b4bd MS |
14282 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
14283 | opposite order to the dwarf2 specification, but data is still | |
14284 | laid out as per normal fortran. | |
7ca2d3a3 | 14285 | |
0963b4bd MS |
14286 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
14287 | version checking. */ | |
7ca2d3a3 | 14288 | |
905e0470 PM |
14289 | if (cu->language == language_fortran |
14290 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
14291 | { |
14292 | return DW_ORD_row_major; | |
14293 | } | |
14294 | ||
6e70227d | 14295 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
14296 | { |
14297 | case array_column_major: | |
14298 | return DW_ORD_col_major; | |
14299 | case array_row_major: | |
14300 | default: | |
14301 | return DW_ORD_row_major; | |
14302 | }; | |
14303 | } | |
14304 | ||
72019c9c | 14305 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 14306 | the DIE's type field. */ |
72019c9c | 14307 | |
f792889a | 14308 | static struct type * |
72019c9c GM |
14309 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
14310 | { | |
7e314c57 JK |
14311 | struct type *domain_type, *set_type; |
14312 | struct attribute *attr; | |
f792889a | 14313 | |
7e314c57 JK |
14314 | domain_type = die_type (die, cu); |
14315 | ||
14316 | /* The die_type call above may have already set the type for this DIE. */ | |
14317 | set_type = get_die_type (die, cu); | |
14318 | if (set_type) | |
14319 | return set_type; | |
14320 | ||
14321 | set_type = create_set_type (NULL, domain_type); | |
14322 | ||
14323 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
14324 | if (attr) |
14325 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 14326 | |
f792889a | 14327 | return set_die_type (die, set_type, cu); |
72019c9c | 14328 | } |
7ca2d3a3 | 14329 | |
0971de02 TT |
14330 | /* A helper for read_common_block that creates a locexpr baton. |
14331 | SYM is the symbol which we are marking as computed. | |
14332 | COMMON_DIE is the DIE for the common block. | |
14333 | COMMON_LOC is the location expression attribute for the common | |
14334 | block itself. | |
14335 | MEMBER_LOC is the location expression attribute for the particular | |
14336 | member of the common block that we are processing. | |
14337 | CU is the CU from which the above come. */ | |
14338 | ||
14339 | static void | |
14340 | mark_common_block_symbol_computed (struct symbol *sym, | |
14341 | struct die_info *common_die, | |
14342 | struct attribute *common_loc, | |
14343 | struct attribute *member_loc, | |
14344 | struct dwarf2_cu *cu) | |
14345 | { | |
14346 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14347 | struct dwarf2_locexpr_baton *baton; | |
14348 | gdb_byte *ptr; | |
14349 | unsigned int cu_off; | |
14350 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
14351 | LONGEST offset = 0; | |
14352 | ||
14353 | gdb_assert (common_loc && member_loc); | |
14354 | gdb_assert (attr_form_is_block (common_loc)); | |
14355 | gdb_assert (attr_form_is_block (member_loc) | |
14356 | || attr_form_is_constant (member_loc)); | |
14357 | ||
8d749320 | 14358 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
14359 | baton->per_cu = cu->per_cu; |
14360 | gdb_assert (baton->per_cu); | |
14361 | ||
14362 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
14363 | ||
14364 | if (attr_form_is_constant (member_loc)) | |
14365 | { | |
14366 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
14367 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
14368 | } | |
14369 | else | |
14370 | baton->size += DW_BLOCK (member_loc)->size; | |
14371 | ||
224c3ddb | 14372 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
14373 | baton->data = ptr; |
14374 | ||
14375 | *ptr++ = DW_OP_call4; | |
9c541725 | 14376 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
14377 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
14378 | ptr += 4; | |
14379 | ||
14380 | if (attr_form_is_constant (member_loc)) | |
14381 | { | |
14382 | *ptr++ = DW_OP_addr; | |
14383 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
14384 | ptr += cu->header.addr_size; | |
14385 | } | |
14386 | else | |
14387 | { | |
14388 | /* We have to copy the data here, because DW_OP_call4 will only | |
14389 | use a DW_AT_location attribute. */ | |
14390 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
14391 | ptr += DW_BLOCK (member_loc)->size; | |
14392 | } | |
14393 | ||
14394 | *ptr++ = DW_OP_plus; | |
14395 | gdb_assert (ptr - baton->data == baton->size); | |
14396 | ||
0971de02 | 14397 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 14398 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
14399 | } |
14400 | ||
4357ac6c TT |
14401 | /* Create appropriate locally-scoped variables for all the |
14402 | DW_TAG_common_block entries. Also create a struct common_block | |
14403 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
14404 | is used to sepate the common blocks name namespace from regular | |
14405 | variable names. */ | |
c906108c SS |
14406 | |
14407 | static void | |
e7c27a73 | 14408 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14409 | { |
0971de02 TT |
14410 | struct attribute *attr; |
14411 | ||
14412 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
14413 | if (attr) | |
14414 | { | |
14415 | /* Support the .debug_loc offsets. */ | |
14416 | if (attr_form_is_block (attr)) | |
14417 | { | |
14418 | /* Ok. */ | |
14419 | } | |
14420 | else if (attr_form_is_section_offset (attr)) | |
14421 | { | |
14422 | dwarf2_complex_location_expr_complaint (); | |
14423 | attr = NULL; | |
14424 | } | |
14425 | else | |
14426 | { | |
14427 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14428 | "common block member"); | |
14429 | attr = NULL; | |
14430 | } | |
14431 | } | |
14432 | ||
639d11d3 | 14433 | if (die->child != NULL) |
c906108c | 14434 | { |
4357ac6c TT |
14435 | struct objfile *objfile = cu->objfile; |
14436 | struct die_info *child_die; | |
14437 | size_t n_entries = 0, size; | |
14438 | struct common_block *common_block; | |
14439 | struct symbol *sym; | |
74ac6d43 | 14440 | |
4357ac6c TT |
14441 | for (child_die = die->child; |
14442 | child_die && child_die->tag; | |
14443 | child_die = sibling_die (child_die)) | |
14444 | ++n_entries; | |
14445 | ||
14446 | size = (sizeof (struct common_block) | |
14447 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
14448 | common_block |
14449 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
14450 | size); | |
4357ac6c TT |
14451 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
14452 | common_block->n_entries = 0; | |
14453 | ||
14454 | for (child_die = die->child; | |
14455 | child_die && child_die->tag; | |
14456 | child_die = sibling_die (child_die)) | |
14457 | { | |
14458 | /* Create the symbol in the DW_TAG_common_block block in the current | |
14459 | symbol scope. */ | |
e7c27a73 | 14460 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
14461 | if (sym != NULL) |
14462 | { | |
14463 | struct attribute *member_loc; | |
14464 | ||
14465 | common_block->contents[common_block->n_entries++] = sym; | |
14466 | ||
14467 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
14468 | cu); | |
14469 | if (member_loc) | |
14470 | { | |
14471 | /* GDB has handled this for a long time, but it is | |
14472 | not specified by DWARF. It seems to have been | |
14473 | emitted by gfortran at least as recently as: | |
14474 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
14475 | complaint (&symfile_complaints, | |
14476 | _("Variable in common block has " | |
14477 | "DW_AT_data_member_location " | |
14478 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 14479 | to_underlying (child_die->sect_off), |
4262abfb | 14480 | objfile_name (cu->objfile)); |
0971de02 TT |
14481 | |
14482 | if (attr_form_is_section_offset (member_loc)) | |
14483 | dwarf2_complex_location_expr_complaint (); | |
14484 | else if (attr_form_is_constant (member_loc) | |
14485 | || attr_form_is_block (member_loc)) | |
14486 | { | |
14487 | if (attr) | |
14488 | mark_common_block_symbol_computed (sym, die, attr, | |
14489 | member_loc, cu); | |
14490 | } | |
14491 | else | |
14492 | dwarf2_complex_location_expr_complaint (); | |
14493 | } | |
14494 | } | |
c906108c | 14495 | } |
4357ac6c TT |
14496 | |
14497 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
14498 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
14499 | } |
14500 | } | |
14501 | ||
0114d602 | 14502 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 14503 | |
0114d602 DJ |
14504 | static struct type * |
14505 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 14506 | { |
e7c27a73 | 14507 | struct objfile *objfile = cu->objfile; |
0114d602 | 14508 | const char *previous_prefix, *name; |
9219021c | 14509 | int is_anonymous; |
0114d602 DJ |
14510 | struct type *type; |
14511 | ||
14512 | /* For extensions, reuse the type of the original namespace. */ | |
14513 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
14514 | { | |
14515 | struct die_info *ext_die; | |
14516 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 14517 | |
0114d602 DJ |
14518 | ext_die = dwarf2_extension (die, &ext_cu); |
14519 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
14520 | |
14521 | /* EXT_CU may not be the same as CU. | |
02142a6c | 14522 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
14523 | return set_die_type (die, type, cu); |
14524 | } | |
9219021c | 14525 | |
e142c38c | 14526 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
14527 | |
14528 | /* Now build the name of the current namespace. */ | |
14529 | ||
0114d602 DJ |
14530 | previous_prefix = determine_prefix (die, cu); |
14531 | if (previous_prefix[0] != '\0') | |
14532 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 14533 | previous_prefix, name, 0, cu); |
0114d602 DJ |
14534 | |
14535 | /* Create the type. */ | |
19f392bc | 14536 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
14537 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
14538 | ||
60531b24 | 14539 | return set_die_type (die, type, cu); |
0114d602 DJ |
14540 | } |
14541 | ||
22cee43f | 14542 | /* Read a namespace scope. */ |
0114d602 DJ |
14543 | |
14544 | static void | |
14545 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
14546 | { | |
14547 | struct objfile *objfile = cu->objfile; | |
0114d602 | 14548 | int is_anonymous; |
9219021c | 14549 | |
5c4e30ca DC |
14550 | /* Add a symbol associated to this if we haven't seen the namespace |
14551 | before. Also, add a using directive if it's an anonymous | |
14552 | namespace. */ | |
9219021c | 14553 | |
f2f0e013 | 14554 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
14555 | { |
14556 | struct type *type; | |
14557 | ||
0114d602 | 14558 | type = read_type_die (die, cu); |
e7c27a73 | 14559 | new_symbol (die, type, cu); |
5c4e30ca | 14560 | |
e8e80198 | 14561 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 14562 | if (is_anonymous) |
0114d602 DJ |
14563 | { |
14564 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 14565 | |
eb1e02fd | 14566 | std::vector<const char *> excludes; |
22cee43f PMR |
14567 | add_using_directive (using_directives (cu->language), |
14568 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 14569 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 14570 | } |
5c4e30ca | 14571 | } |
9219021c | 14572 | |
639d11d3 | 14573 | if (die->child != NULL) |
d9fa45fe | 14574 | { |
639d11d3 | 14575 | struct die_info *child_die = die->child; |
6e70227d | 14576 | |
d9fa45fe DC |
14577 | while (child_die && child_die->tag) |
14578 | { | |
e7c27a73 | 14579 | process_die (child_die, cu); |
d9fa45fe DC |
14580 | child_die = sibling_die (child_die); |
14581 | } | |
14582 | } | |
38d518c9 EZ |
14583 | } |
14584 | ||
f55ee35c JK |
14585 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
14586 | imported module. Still we need that type as local Fortran "use ... only" | |
14587 | declaration imports depend on the created type in determine_prefix. */ | |
14588 | ||
14589 | static struct type * | |
14590 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
14591 | { | |
14592 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 14593 | const char *module_name; |
f55ee35c JK |
14594 | struct type *type; |
14595 | ||
14596 | module_name = dwarf2_name (die, cu); | |
14597 | if (!module_name) | |
3e43a32a MS |
14598 | complaint (&symfile_complaints, |
14599 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 14600 | to_underlying (die->sect_off)); |
19f392bc | 14601 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
14602 | |
14603 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
14604 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
14605 | ||
14606 | return set_die_type (die, type, cu); | |
14607 | } | |
14608 | ||
5d7cb8df JK |
14609 | /* Read a Fortran module. */ |
14610 | ||
14611 | static void | |
14612 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
14613 | { | |
14614 | struct die_info *child_die = die->child; | |
530e8392 KB |
14615 | struct type *type; |
14616 | ||
14617 | type = read_type_die (die, cu); | |
14618 | new_symbol (die, type, cu); | |
5d7cb8df | 14619 | |
5d7cb8df JK |
14620 | while (child_die && child_die->tag) |
14621 | { | |
14622 | process_die (child_die, cu); | |
14623 | child_die = sibling_die (child_die); | |
14624 | } | |
14625 | } | |
14626 | ||
38d518c9 EZ |
14627 | /* Return the name of the namespace represented by DIE. Set |
14628 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
14629 | namespace. */ | |
14630 | ||
14631 | static const char * | |
e142c38c | 14632 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
14633 | { |
14634 | struct die_info *current_die; | |
14635 | const char *name = NULL; | |
14636 | ||
14637 | /* Loop through the extensions until we find a name. */ | |
14638 | ||
14639 | for (current_die = die; | |
14640 | current_die != NULL; | |
f2f0e013 | 14641 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 14642 | { |
96553a0c DE |
14643 | /* We don't use dwarf2_name here so that we can detect the absence |
14644 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 14645 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 14646 | |
38d518c9 EZ |
14647 | if (name != NULL) |
14648 | break; | |
14649 | } | |
14650 | ||
14651 | /* Is it an anonymous namespace? */ | |
14652 | ||
14653 | *is_anonymous = (name == NULL); | |
14654 | if (*is_anonymous) | |
2b1dbab0 | 14655 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
14656 | |
14657 | return name; | |
d9fa45fe DC |
14658 | } |
14659 | ||
c906108c SS |
14660 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
14661 | the user defined type vector. */ | |
14662 | ||
f792889a | 14663 | static struct type * |
e7c27a73 | 14664 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14665 | { |
5e2b427d | 14666 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 14667 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 14668 | struct type *type; |
8b2dbe47 KB |
14669 | struct attribute *attr_byte_size; |
14670 | struct attribute *attr_address_class; | |
14671 | int byte_size, addr_class; | |
7e314c57 JK |
14672 | struct type *target_type; |
14673 | ||
14674 | target_type = die_type (die, cu); | |
c906108c | 14675 | |
7e314c57 JK |
14676 | /* The die_type call above may have already set the type for this DIE. */ |
14677 | type = get_die_type (die, cu); | |
14678 | if (type) | |
14679 | return type; | |
14680 | ||
14681 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 14682 | |
e142c38c | 14683 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
14684 | if (attr_byte_size) |
14685 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 14686 | else |
8b2dbe47 KB |
14687 | byte_size = cu_header->addr_size; |
14688 | ||
e142c38c | 14689 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
14690 | if (attr_address_class) |
14691 | addr_class = DW_UNSND (attr_address_class); | |
14692 | else | |
14693 | addr_class = DW_ADDR_none; | |
14694 | ||
14695 | /* If the pointer size or address class is different than the | |
14696 | default, create a type variant marked as such and set the | |
14697 | length accordingly. */ | |
14698 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 14699 | { |
5e2b427d | 14700 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
14701 | { |
14702 | int type_flags; | |
14703 | ||
849957d9 | 14704 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 14705 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
14706 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
14707 | == 0); | |
8b2dbe47 KB |
14708 | type = make_type_with_address_space (type, type_flags); |
14709 | } | |
14710 | else if (TYPE_LENGTH (type) != byte_size) | |
14711 | { | |
3e43a32a MS |
14712 | complaint (&symfile_complaints, |
14713 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 14714 | } |
6e70227d | 14715 | else |
9a619af0 MS |
14716 | { |
14717 | /* Should we also complain about unhandled address classes? */ | |
14718 | } | |
c906108c | 14719 | } |
8b2dbe47 KB |
14720 | |
14721 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 14722 | return set_die_type (die, type, cu); |
c906108c SS |
14723 | } |
14724 | ||
14725 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
14726 | the user defined type vector. */ | |
14727 | ||
f792889a | 14728 | static struct type * |
e7c27a73 | 14729 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
14730 | { |
14731 | struct type *type; | |
14732 | struct type *to_type; | |
14733 | struct type *domain; | |
14734 | ||
e7c27a73 DJ |
14735 | to_type = die_type (die, cu); |
14736 | domain = die_containing_type (die, cu); | |
0d5de010 | 14737 | |
7e314c57 JK |
14738 | /* The calls above may have already set the type for this DIE. */ |
14739 | type = get_die_type (die, cu); | |
14740 | if (type) | |
14741 | return type; | |
14742 | ||
0d5de010 DJ |
14743 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
14744 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
14745 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
14746 | { | |
14747 | struct type *new_type = alloc_type (cu->objfile); | |
14748 | ||
14749 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
14750 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
14751 | TYPE_VARARGS (to_type)); | |
14752 | type = lookup_methodptr_type (new_type); | |
14753 | } | |
0d5de010 DJ |
14754 | else |
14755 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 14756 | |
f792889a | 14757 | return set_die_type (die, type, cu); |
c906108c SS |
14758 | } |
14759 | ||
4297a3f0 | 14760 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
14761 | the user defined type vector. */ |
14762 | ||
f792889a | 14763 | static struct type * |
4297a3f0 AV |
14764 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
14765 | enum type_code refcode) | |
c906108c | 14766 | { |
e7c27a73 | 14767 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 14768 | struct type *type, *target_type; |
c906108c SS |
14769 | struct attribute *attr; |
14770 | ||
4297a3f0 AV |
14771 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
14772 | ||
7e314c57 JK |
14773 | target_type = die_type (die, cu); |
14774 | ||
14775 | /* The die_type call above may have already set the type for this DIE. */ | |
14776 | type = get_die_type (die, cu); | |
14777 | if (type) | |
14778 | return type; | |
14779 | ||
4297a3f0 | 14780 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 14781 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14782 | if (attr) |
14783 | { | |
14784 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14785 | } | |
14786 | else | |
14787 | { | |
107d2387 | 14788 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 14789 | } |
f792889a | 14790 | return set_die_type (die, type, cu); |
c906108c SS |
14791 | } |
14792 | ||
cf363f18 MW |
14793 | /* Add the given cv-qualifiers to the element type of the array. GCC |
14794 | outputs DWARF type qualifiers that apply to an array, not the | |
14795 | element type. But GDB relies on the array element type to carry | |
14796 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
14797 | specification. */ | |
14798 | ||
14799 | static struct type * | |
14800 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
14801 | struct type *base_type, int cnst, int voltl) | |
14802 | { | |
14803 | struct type *el_type, *inner_array; | |
14804 | ||
14805 | base_type = copy_type (base_type); | |
14806 | inner_array = base_type; | |
14807 | ||
14808 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14809 | { | |
14810 | TYPE_TARGET_TYPE (inner_array) = | |
14811 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14812 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14813 | } | |
14814 | ||
14815 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14816 | cnst |= TYPE_CONST (el_type); | |
14817 | voltl |= TYPE_VOLATILE (el_type); | |
14818 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
14819 | ||
14820 | return set_die_type (die, base_type, cu); | |
14821 | } | |
14822 | ||
f792889a | 14823 | static struct type * |
e7c27a73 | 14824 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14825 | { |
f792889a | 14826 | struct type *base_type, *cv_type; |
c906108c | 14827 | |
e7c27a73 | 14828 | base_type = die_type (die, cu); |
7e314c57 JK |
14829 | |
14830 | /* The die_type call above may have already set the type for this DIE. */ | |
14831 | cv_type = get_die_type (die, cu); | |
14832 | if (cv_type) | |
14833 | return cv_type; | |
14834 | ||
2f608a3a KW |
14835 | /* In case the const qualifier is applied to an array type, the element type |
14836 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
14837 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 14838 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 14839 | |
f792889a DJ |
14840 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14841 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14842 | } |
14843 | ||
f792889a | 14844 | static struct type * |
e7c27a73 | 14845 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14846 | { |
f792889a | 14847 | struct type *base_type, *cv_type; |
c906108c | 14848 | |
e7c27a73 | 14849 | base_type = die_type (die, cu); |
7e314c57 JK |
14850 | |
14851 | /* The die_type call above may have already set the type for this DIE. */ | |
14852 | cv_type = get_die_type (die, cu); | |
14853 | if (cv_type) | |
14854 | return cv_type; | |
14855 | ||
cf363f18 MW |
14856 | /* In case the volatile qualifier is applied to an array type, the |
14857 | element type is so qualified, not the array type (section 6.7.3 | |
14858 | of C99). */ | |
14859 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
14860 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
14861 | ||
f792889a DJ |
14862 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14863 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14864 | } |
14865 | ||
06d66ee9 TT |
14866 | /* Handle DW_TAG_restrict_type. */ |
14867 | ||
14868 | static struct type * | |
14869 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14870 | { | |
14871 | struct type *base_type, *cv_type; | |
14872 | ||
14873 | base_type = die_type (die, cu); | |
14874 | ||
14875 | /* The die_type call above may have already set the type for this DIE. */ | |
14876 | cv_type = get_die_type (die, cu); | |
14877 | if (cv_type) | |
14878 | return cv_type; | |
14879 | ||
14880 | cv_type = make_restrict_type (base_type); | |
14881 | return set_die_type (die, cv_type, cu); | |
14882 | } | |
14883 | ||
a2c2acaf MW |
14884 | /* Handle DW_TAG_atomic_type. */ |
14885 | ||
14886 | static struct type * | |
14887 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
14888 | { | |
14889 | struct type *base_type, *cv_type; | |
14890 | ||
14891 | base_type = die_type (die, cu); | |
14892 | ||
14893 | /* The die_type call above may have already set the type for this DIE. */ | |
14894 | cv_type = get_die_type (die, cu); | |
14895 | if (cv_type) | |
14896 | return cv_type; | |
14897 | ||
14898 | cv_type = make_atomic_type (base_type); | |
14899 | return set_die_type (die, cv_type, cu); | |
14900 | } | |
14901 | ||
c906108c SS |
14902 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14903 | the user defined type vector. It isn't really a user defined type, | |
14904 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14905 | attribute to reference it. */ | |
14906 | ||
f792889a | 14907 | static struct type * |
e7c27a73 | 14908 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14909 | { |
e7c27a73 | 14910 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14911 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14912 | struct type *type, *range_type, *index_type, *char_type; |
14913 | struct attribute *attr; | |
14914 | unsigned int length; | |
14915 | ||
e142c38c | 14916 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14917 | if (attr) |
14918 | { | |
14919 | length = DW_UNSND (attr); | |
14920 | } | |
14921 | else | |
14922 | { | |
0963b4bd | 14923 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14924 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14925 | if (attr) |
14926 | { | |
14927 | length = DW_UNSND (attr); | |
14928 | } | |
14929 | else | |
14930 | { | |
14931 | length = 1; | |
14932 | } | |
c906108c | 14933 | } |
6ccb9162 | 14934 | |
46bf5051 | 14935 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14936 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14937 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14938 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14939 | |
f792889a | 14940 | return set_die_type (die, type, cu); |
c906108c SS |
14941 | } |
14942 | ||
4d804846 JB |
14943 | /* Assuming that DIE corresponds to a function, returns nonzero |
14944 | if the function is prototyped. */ | |
14945 | ||
14946 | static int | |
14947 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14948 | { | |
14949 | struct attribute *attr; | |
14950 | ||
14951 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14952 | if (attr && (DW_UNSND (attr) != 0)) | |
14953 | return 1; | |
14954 | ||
14955 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
14956 | is only meaninful for C, but the concept also extends to other | |
14957 | languages that allow unprototyped functions (Eg: Objective C). | |
14958 | For all other languages, assume that functions are always | |
14959 | prototyped. */ | |
14960 | if (cu->language != language_c | |
14961 | && cu->language != language_objc | |
14962 | && cu->language != language_opencl) | |
14963 | return 1; | |
14964 | ||
14965 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
14966 | prototyped and unprototyped functions; default to prototyped, | |
14967 | since that is more common in modern code (and RealView warns | |
14968 | about unprototyped functions). */ | |
14969 | if (producer_is_realview (cu->producer)) | |
14970 | return 1; | |
14971 | ||
14972 | return 0; | |
14973 | } | |
14974 | ||
c906108c SS |
14975 | /* Handle DIES due to C code like: |
14976 | ||
14977 | struct foo | |
c5aa993b JM |
14978 | { |
14979 | int (*funcp)(int a, long l); | |
14980 | int b; | |
14981 | }; | |
c906108c | 14982 | |
0963b4bd | 14983 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 14984 | |
f792889a | 14985 | static struct type * |
e7c27a73 | 14986 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14987 | { |
bb5ed363 | 14988 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
14989 | struct type *type; /* Type that this function returns. */ |
14990 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
14991 | struct attribute *attr; |
14992 | ||
e7c27a73 | 14993 | type = die_type (die, cu); |
7e314c57 JK |
14994 | |
14995 | /* The die_type call above may have already set the type for this DIE. */ | |
14996 | ftype = get_die_type (die, cu); | |
14997 | if (ftype) | |
14998 | return ftype; | |
14999 | ||
0c8b41f1 | 15000 | ftype = lookup_function_type (type); |
c906108c | 15001 | |
4d804846 | 15002 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15003 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15004 | |
c055b101 CV |
15005 | /* Store the calling convention in the type if it's available in |
15006 | the subroutine die. Otherwise set the calling convention to | |
15007 | the default value DW_CC_normal. */ | |
15008 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15009 | if (attr) |
15010 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15011 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15012 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15013 | else | |
15014 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15015 | |
743649fd MW |
15016 | /* Record whether the function returns normally to its caller or not |
15017 | if the DWARF producer set that information. */ | |
15018 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15019 | if (attr && (DW_UNSND (attr) != 0)) | |
15020 | TYPE_NO_RETURN (ftype) = 1; | |
15021 | ||
76c10ea2 GM |
15022 | /* We need to add the subroutine type to the die immediately so |
15023 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15024 | declared as the same subroutine type. */ |
76c10ea2 | 15025 | set_die_type (die, ftype, cu); |
6e70227d | 15026 | |
639d11d3 | 15027 | if (die->child != NULL) |
c906108c | 15028 | { |
bb5ed363 | 15029 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15030 | struct die_info *child_die; |
8072405b | 15031 | int nparams, iparams; |
c906108c SS |
15032 | |
15033 | /* Count the number of parameters. | |
15034 | FIXME: GDB currently ignores vararg functions, but knows about | |
15035 | vararg member functions. */ | |
8072405b | 15036 | nparams = 0; |
639d11d3 | 15037 | child_die = die->child; |
c906108c SS |
15038 | while (child_die && child_die->tag) |
15039 | { | |
15040 | if (child_die->tag == DW_TAG_formal_parameter) | |
15041 | nparams++; | |
15042 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15043 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15044 | child_die = sibling_die (child_die); |
15045 | } | |
15046 | ||
15047 | /* Allocate storage for parameters and fill them in. */ | |
15048 | TYPE_NFIELDS (ftype) = nparams; | |
15049 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15050 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15051 | |
8072405b JK |
15052 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15053 | even if we error out during the parameters reading below. */ | |
15054 | for (iparams = 0; iparams < nparams; iparams++) | |
15055 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15056 | ||
15057 | iparams = 0; | |
639d11d3 | 15058 | child_die = die->child; |
c906108c SS |
15059 | while (child_die && child_die->tag) |
15060 | { | |
15061 | if (child_die->tag == DW_TAG_formal_parameter) | |
15062 | { | |
3ce3b1ba PA |
15063 | struct type *arg_type; |
15064 | ||
15065 | /* DWARF version 2 has no clean way to discern C++ | |
15066 | static and non-static member functions. G++ helps | |
15067 | GDB by marking the first parameter for non-static | |
15068 | member functions (which is the this pointer) as | |
15069 | artificial. We pass this information to | |
15070 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15071 | ||
15072 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15073 | 4.5 does not yet generate. */ | |
e142c38c | 15074 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15075 | if (attr) |
15076 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
15077 | else | |
9c37b5ae | 15078 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
15079 | arg_type = die_type (child_die, cu); |
15080 | ||
15081 | /* RealView does not mark THIS as const, which the testsuite | |
15082 | expects. GCC marks THIS as const in method definitions, | |
15083 | but not in the class specifications (GCC PR 43053). */ | |
15084 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
15085 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
15086 | { | |
15087 | int is_this = 0; | |
15088 | struct dwarf2_cu *arg_cu = cu; | |
15089 | const char *name = dwarf2_name (child_die, cu); | |
15090 | ||
15091 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
15092 | if (attr) | |
15093 | { | |
15094 | /* If the compiler emits this, use it. */ | |
15095 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
15096 | is_this = 1; | |
15097 | } | |
15098 | else if (name && strcmp (name, "this") == 0) | |
15099 | /* Function definitions will have the argument names. */ | |
15100 | is_this = 1; | |
15101 | else if (name == NULL && iparams == 0) | |
15102 | /* Declarations may not have the names, so like | |
15103 | elsewhere in GDB, assume an artificial first | |
15104 | argument is "this". */ | |
15105 | is_this = 1; | |
15106 | ||
15107 | if (is_this) | |
15108 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
15109 | arg_type, 0); | |
15110 | } | |
15111 | ||
15112 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
15113 | iparams++; |
15114 | } | |
15115 | child_die = sibling_die (child_die); | |
15116 | } | |
15117 | } | |
15118 | ||
76c10ea2 | 15119 | return ftype; |
c906108c SS |
15120 | } |
15121 | ||
f792889a | 15122 | static struct type * |
e7c27a73 | 15123 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15124 | { |
e7c27a73 | 15125 | struct objfile *objfile = cu->objfile; |
0114d602 | 15126 | const char *name = NULL; |
3c8e0968 | 15127 | struct type *this_type, *target_type; |
c906108c | 15128 | |
94af9270 | 15129 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
15130 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
15131 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 15132 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
15133 | target_type = die_type (die, cu); |
15134 | if (target_type != this_type) | |
15135 | TYPE_TARGET_TYPE (this_type) = target_type; | |
15136 | else | |
15137 | { | |
15138 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
15139 | spec and cause infinite loops in GDB. */ | |
15140 | complaint (&symfile_complaints, | |
15141 | _("Self-referential DW_TAG_typedef " | |
15142 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15143 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
15144 | TYPE_TARGET_TYPE (this_type) = NULL; |
15145 | } | |
f792889a | 15146 | return this_type; |
c906108c SS |
15147 | } |
15148 | ||
9b790ce7 UW |
15149 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
15150 | (which may be different from NAME) to the architecture back-end to allow | |
15151 | it to guess the correct format if necessary. */ | |
15152 | ||
15153 | static struct type * | |
15154 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
15155 | const char *name_hint) | |
15156 | { | |
15157 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15158 | const struct floatformat **format; | |
15159 | struct type *type; | |
15160 | ||
15161 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
15162 | if (format) | |
15163 | type = init_float_type (objfile, bits, name, format); | |
15164 | else | |
77b7c781 | 15165 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
15166 | |
15167 | return type; | |
15168 | } | |
15169 | ||
c906108c SS |
15170 | /* Find a representation of a given base type and install |
15171 | it in the TYPE field of the die. */ | |
15172 | ||
f792889a | 15173 | static struct type * |
e7c27a73 | 15174 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15175 | { |
e7c27a73 | 15176 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15177 | struct type *type; |
15178 | struct attribute *attr; | |
19f392bc | 15179 | int encoding = 0, bits = 0; |
15d034d0 | 15180 | const char *name; |
c906108c | 15181 | |
e142c38c | 15182 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
15183 | if (attr) |
15184 | { | |
15185 | encoding = DW_UNSND (attr); | |
15186 | } | |
e142c38c | 15187 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15188 | if (attr) |
15189 | { | |
19f392bc | 15190 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 15191 | } |
39cbfefa | 15192 | name = dwarf2_name (die, cu); |
6ccb9162 | 15193 | if (!name) |
c906108c | 15194 | { |
6ccb9162 UW |
15195 | complaint (&symfile_complaints, |
15196 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 15197 | } |
6ccb9162 UW |
15198 | |
15199 | switch (encoding) | |
c906108c | 15200 | { |
6ccb9162 UW |
15201 | case DW_ATE_address: |
15202 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 15203 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 15204 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
15205 | break; |
15206 | case DW_ATE_boolean: | |
19f392bc | 15207 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
15208 | break; |
15209 | case DW_ATE_complex_float: | |
9b790ce7 | 15210 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 15211 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
15212 | break; |
15213 | case DW_ATE_decimal_float: | |
19f392bc | 15214 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
15215 | break; |
15216 | case DW_ATE_float: | |
9b790ce7 | 15217 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
15218 | break; |
15219 | case DW_ATE_signed: | |
19f392bc | 15220 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
15221 | break; |
15222 | case DW_ATE_unsigned: | |
3b2b8fea TT |
15223 | if (cu->language == language_fortran |
15224 | && name | |
61012eef | 15225 | && startswith (name, "character(")) |
19f392bc UW |
15226 | type = init_character_type (objfile, bits, 1, name); |
15227 | else | |
15228 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
15229 | break; |
15230 | case DW_ATE_signed_char: | |
6e70227d | 15231 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
15232 | || cu->language == language_pascal |
15233 | || cu->language == language_fortran) | |
19f392bc UW |
15234 | type = init_character_type (objfile, bits, 0, name); |
15235 | else | |
15236 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
15237 | break; |
15238 | case DW_ATE_unsigned_char: | |
868a0084 | 15239 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 15240 | || cu->language == language_pascal |
c44af4eb TT |
15241 | || cu->language == language_fortran |
15242 | || cu->language == language_rust) | |
19f392bc UW |
15243 | type = init_character_type (objfile, bits, 1, name); |
15244 | else | |
15245 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 15246 | break; |
75079b2b | 15247 | case DW_ATE_UTF: |
53e710ac PA |
15248 | { |
15249 | gdbarch *arch = get_objfile_arch (objfile); | |
15250 | ||
15251 | if (bits == 16) | |
15252 | type = builtin_type (arch)->builtin_char16; | |
15253 | else if (bits == 32) | |
15254 | type = builtin_type (arch)->builtin_char32; | |
15255 | else | |
15256 | { | |
15257 | complaint (&symfile_complaints, | |
15258 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
15259 | bits); | |
15260 | type = init_integer_type (objfile, bits, 1, name); | |
15261 | } | |
15262 | return set_die_type (die, type, cu); | |
15263 | } | |
75079b2b TT |
15264 | break; |
15265 | ||
6ccb9162 UW |
15266 | default: |
15267 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
15268 | dwarf_type_encoding_name (encoding)); | |
77b7c781 | 15269 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 15270 | break; |
c906108c | 15271 | } |
6ccb9162 | 15272 | |
0114d602 | 15273 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 15274 | TYPE_NOSIGN (type) = 1; |
0114d602 | 15275 | |
f792889a | 15276 | return set_die_type (die, type, cu); |
c906108c SS |
15277 | } |
15278 | ||
80180f79 SA |
15279 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
15280 | resulting value of the attribute into struct bound_prop. | |
15281 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
15282 | ||
15283 | static int | |
15284 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
15285 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
15286 | { | |
15287 | struct dwarf2_property_baton *baton; | |
15288 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
15289 | ||
15290 | if (attr == NULL || prop == NULL) | |
15291 | return 0; | |
15292 | ||
15293 | if (attr_form_is_block (attr)) | |
15294 | { | |
8d749320 | 15295 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
15296 | baton->referenced_type = NULL; |
15297 | baton->locexpr.per_cu = cu->per_cu; | |
15298 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
15299 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
15300 | prop->data.baton = baton; | |
15301 | prop->kind = PROP_LOCEXPR; | |
15302 | gdb_assert (prop->data.baton != NULL); | |
15303 | } | |
15304 | else if (attr_form_is_ref (attr)) | |
15305 | { | |
15306 | struct dwarf2_cu *target_cu = cu; | |
15307 | struct die_info *target_die; | |
15308 | struct attribute *target_attr; | |
15309 | ||
15310 | target_die = follow_die_ref (die, attr, &target_cu); | |
15311 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
15312 | if (target_attr == NULL) |
15313 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
15314 | target_cu); | |
80180f79 SA |
15315 | if (target_attr == NULL) |
15316 | return 0; | |
15317 | ||
df25ebbd | 15318 | switch (target_attr->name) |
80180f79 | 15319 | { |
df25ebbd JB |
15320 | case DW_AT_location: |
15321 | if (attr_form_is_section_offset (target_attr)) | |
15322 | { | |
8d749320 | 15323 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15324 | baton->referenced_type = die_type (target_die, target_cu); |
15325 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
15326 | prop->data.baton = baton; | |
15327 | prop->kind = PROP_LOCLIST; | |
15328 | gdb_assert (prop->data.baton != NULL); | |
15329 | } | |
15330 | else if (attr_form_is_block (target_attr)) | |
15331 | { | |
8d749320 | 15332 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15333 | baton->referenced_type = die_type (target_die, target_cu); |
15334 | baton->locexpr.per_cu = cu->per_cu; | |
15335 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
15336 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
15337 | prop->data.baton = baton; | |
15338 | prop->kind = PROP_LOCEXPR; | |
15339 | gdb_assert (prop->data.baton != NULL); | |
15340 | } | |
15341 | else | |
15342 | { | |
15343 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15344 | "dynamic property"); | |
15345 | return 0; | |
15346 | } | |
15347 | break; | |
15348 | case DW_AT_data_member_location: | |
15349 | { | |
15350 | LONGEST offset; | |
15351 | ||
15352 | if (!handle_data_member_location (target_die, target_cu, | |
15353 | &offset)) | |
15354 | return 0; | |
15355 | ||
8d749320 | 15356 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
15357 | baton->referenced_type = read_type_die (target_die->parent, |
15358 | target_cu); | |
df25ebbd JB |
15359 | baton->offset_info.offset = offset; |
15360 | baton->offset_info.type = die_type (target_die, target_cu); | |
15361 | prop->data.baton = baton; | |
15362 | prop->kind = PROP_ADDR_OFFSET; | |
15363 | break; | |
15364 | } | |
80180f79 SA |
15365 | } |
15366 | } | |
15367 | else if (attr_form_is_constant (attr)) | |
15368 | { | |
15369 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
15370 | prop->kind = PROP_CONST; | |
15371 | } | |
15372 | else | |
15373 | { | |
15374 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
15375 | dwarf2_name (die, cu)); | |
15376 | return 0; | |
15377 | } | |
15378 | ||
15379 | return 1; | |
15380 | } | |
15381 | ||
a02abb62 JB |
15382 | /* Read the given DW_AT_subrange DIE. */ |
15383 | ||
f792889a | 15384 | static struct type * |
a02abb62 JB |
15385 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
15386 | { | |
4c9ad8c2 | 15387 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
15388 | struct type *range_type; |
15389 | struct attribute *attr; | |
729efb13 | 15390 | struct dynamic_prop low, high; |
4fae6e18 | 15391 | int low_default_is_valid; |
c451ebe5 | 15392 | int high_bound_is_count = 0; |
15d034d0 | 15393 | const char *name; |
43bbcdc2 | 15394 | LONGEST negative_mask; |
e77813c8 | 15395 | |
4c9ad8c2 TT |
15396 | orig_base_type = die_type (die, cu); |
15397 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
15398 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
15399 | creating the range type, but we use the result of check_typedef | |
15400 | when examining properties of the type. */ | |
15401 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 15402 | |
7e314c57 JK |
15403 | /* The die_type call above may have already set the type for this DIE. */ |
15404 | range_type = get_die_type (die, cu); | |
15405 | if (range_type) | |
15406 | return range_type; | |
15407 | ||
729efb13 SA |
15408 | low.kind = PROP_CONST; |
15409 | high.kind = PROP_CONST; | |
15410 | high.data.const_val = 0; | |
15411 | ||
4fae6e18 JK |
15412 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
15413 | omitting DW_AT_lower_bound. */ | |
15414 | switch (cu->language) | |
6e70227d | 15415 | { |
4fae6e18 JK |
15416 | case language_c: |
15417 | case language_cplus: | |
729efb13 | 15418 | low.data.const_val = 0; |
4fae6e18 JK |
15419 | low_default_is_valid = 1; |
15420 | break; | |
15421 | case language_fortran: | |
729efb13 | 15422 | low.data.const_val = 1; |
4fae6e18 JK |
15423 | low_default_is_valid = 1; |
15424 | break; | |
15425 | case language_d: | |
4fae6e18 | 15426 | case language_objc: |
c44af4eb | 15427 | case language_rust: |
729efb13 | 15428 | low.data.const_val = 0; |
4fae6e18 JK |
15429 | low_default_is_valid = (cu->header.version >= 4); |
15430 | break; | |
15431 | case language_ada: | |
15432 | case language_m2: | |
15433 | case language_pascal: | |
729efb13 | 15434 | low.data.const_val = 1; |
4fae6e18 JK |
15435 | low_default_is_valid = (cu->header.version >= 4); |
15436 | break; | |
15437 | default: | |
729efb13 | 15438 | low.data.const_val = 0; |
4fae6e18 JK |
15439 | low_default_is_valid = 0; |
15440 | break; | |
a02abb62 JB |
15441 | } |
15442 | ||
e142c38c | 15443 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 15444 | if (attr) |
11c1ba78 | 15445 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
15446 | else if (!low_default_is_valid) |
15447 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
15448 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15449 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 15450 | |
e142c38c | 15451 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 15452 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
15453 | { |
15454 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 15455 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 15456 | { |
c451ebe5 SA |
15457 | /* If bounds are constant do the final calculation here. */ |
15458 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
15459 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
15460 | else | |
15461 | high_bound_is_count = 1; | |
c2ff108b | 15462 | } |
e77813c8 PM |
15463 | } |
15464 | ||
15465 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
15466 | without specifying a base type. | |
15467 | In that case, the base type must be set to the type of | |
15468 | the lower bound, upper bound or count, in that order, if any of these | |
15469 | three attributes references an object that has a type. | |
15470 | If no base type is found, the Dwarf-2 specifications say that | |
15471 | a signed integer type of size equal to the size of an address should | |
15472 | be used. | |
15473 | For the following C code: `extern char gdb_int [];' | |
15474 | GCC produces an empty range DIE. | |
15475 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 15476 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
15477 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
15478 | { | |
15479 | struct objfile *objfile = cu->objfile; | |
15480 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15481 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
15482 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
15483 | ||
15484 | /* Test "int", "long int", and "long long int" objfile types, | |
15485 | and select the first one having a size above or equal to the | |
15486 | architecture address size. */ | |
15487 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15488 | base_type = int_type; | |
15489 | else | |
15490 | { | |
15491 | int_type = objfile_type (objfile)->builtin_long; | |
15492 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15493 | base_type = int_type; | |
15494 | else | |
15495 | { | |
15496 | int_type = objfile_type (objfile)->builtin_long_long; | |
15497 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15498 | base_type = int_type; | |
15499 | } | |
15500 | } | |
15501 | } | |
a02abb62 | 15502 | |
dbb9c2b1 JB |
15503 | /* Normally, the DWARF producers are expected to use a signed |
15504 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
15505 | But this is unfortunately not always the case, as witnessed | |
15506 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
15507 | is used instead. To work around that ambiguity, we treat | |
15508 | the bounds as signed, and thus sign-extend their values, when | |
15509 | the base type is signed. */ | |
6e70227d | 15510 | negative_mask = |
66c6502d | 15511 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
15512 | if (low.kind == PROP_CONST |
15513 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
15514 | low.data.const_val |= negative_mask; | |
15515 | if (high.kind == PROP_CONST | |
15516 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
15517 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 15518 | |
729efb13 | 15519 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 15520 | |
c451ebe5 SA |
15521 | if (high_bound_is_count) |
15522 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
15523 | ||
c2ff108b JK |
15524 | /* Ada expects an empty array on no boundary attributes. */ |
15525 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 15526 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 15527 | |
39cbfefa DJ |
15528 | name = dwarf2_name (die, cu); |
15529 | if (name) | |
15530 | TYPE_NAME (range_type) = name; | |
6e70227d | 15531 | |
e142c38c | 15532 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
15533 | if (attr) |
15534 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
15535 | ||
7e314c57 JK |
15536 | set_die_type (die, range_type, cu); |
15537 | ||
15538 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15539 | set_descriptive_type (range_type, die, cu); |
15540 | ||
7e314c57 | 15541 | return range_type; |
a02abb62 | 15542 | } |
6e70227d | 15543 | |
f792889a | 15544 | static struct type * |
81a17f79 JB |
15545 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
15546 | { | |
15547 | struct type *type; | |
81a17f79 | 15548 | |
81a17f79 JB |
15549 | /* For now, we only support the C meaning of an unspecified type: void. */ |
15550 | ||
19f392bc | 15551 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 15552 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 15553 | |
f792889a | 15554 | return set_die_type (die, type, cu); |
81a17f79 | 15555 | } |
a02abb62 | 15556 | |
639d11d3 DC |
15557 | /* Read a single die and all its descendents. Set the die's sibling |
15558 | field to NULL; set other fields in the die correctly, and set all | |
15559 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
15560 | location of the info_ptr after reading all of those dies. PARENT | |
15561 | is the parent of the die in question. */ | |
15562 | ||
15563 | static struct die_info * | |
dee91e82 | 15564 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
15565 | const gdb_byte *info_ptr, |
15566 | const gdb_byte **new_info_ptr, | |
dee91e82 | 15567 | struct die_info *parent) |
639d11d3 DC |
15568 | { |
15569 | struct die_info *die; | |
d521ce57 | 15570 | const gdb_byte *cur_ptr; |
639d11d3 DC |
15571 | int has_children; |
15572 | ||
bf6af496 | 15573 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
15574 | if (die == NULL) |
15575 | { | |
15576 | *new_info_ptr = cur_ptr; | |
15577 | return NULL; | |
15578 | } | |
93311388 | 15579 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
15580 | |
15581 | if (has_children) | |
bf6af496 | 15582 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
15583 | else |
15584 | { | |
15585 | die->child = NULL; | |
15586 | *new_info_ptr = cur_ptr; | |
15587 | } | |
15588 | ||
15589 | die->sibling = NULL; | |
15590 | die->parent = parent; | |
15591 | return die; | |
15592 | } | |
15593 | ||
15594 | /* Read a die, all of its descendents, and all of its siblings; set | |
15595 | all of the fields of all of the dies correctly. Arguments are as | |
15596 | in read_die_and_children. */ | |
15597 | ||
15598 | static struct die_info * | |
bf6af496 | 15599 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
15600 | const gdb_byte *info_ptr, |
15601 | const gdb_byte **new_info_ptr, | |
bf6af496 | 15602 | struct die_info *parent) |
639d11d3 DC |
15603 | { |
15604 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 15605 | const gdb_byte *cur_ptr; |
639d11d3 | 15606 | |
c906108c | 15607 | cur_ptr = info_ptr; |
639d11d3 DC |
15608 | first_die = last_sibling = NULL; |
15609 | ||
15610 | while (1) | |
c906108c | 15611 | { |
639d11d3 | 15612 | struct die_info *die |
dee91e82 | 15613 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 15614 | |
1d325ec1 | 15615 | if (die == NULL) |
c906108c | 15616 | { |
639d11d3 DC |
15617 | *new_info_ptr = cur_ptr; |
15618 | return first_die; | |
c906108c | 15619 | } |
1d325ec1 DJ |
15620 | |
15621 | if (!first_die) | |
15622 | first_die = die; | |
c906108c | 15623 | else |
1d325ec1 DJ |
15624 | last_sibling->sibling = die; |
15625 | ||
15626 | last_sibling = die; | |
c906108c | 15627 | } |
c906108c SS |
15628 | } |
15629 | ||
bf6af496 DE |
15630 | /* Read a die, all of its descendents, and all of its siblings; set |
15631 | all of the fields of all of the dies correctly. Arguments are as | |
15632 | in read_die_and_children. | |
15633 | This the main entry point for reading a DIE and all its children. */ | |
15634 | ||
15635 | static struct die_info * | |
15636 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
15637 | const gdb_byte *info_ptr, |
15638 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
15639 | struct die_info *parent) |
15640 | { | |
15641 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
15642 | new_info_ptr, parent); | |
15643 | ||
b4f54984 | 15644 | if (dwarf_die_debug) |
bf6af496 DE |
15645 | { |
15646 | fprintf_unfiltered (gdb_stdlog, | |
15647 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15648 | get_section_name (reader->die_section), |
bf6af496 DE |
15649 | (unsigned) (info_ptr - reader->die_section->buffer), |
15650 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15651 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
15652 | } |
15653 | ||
15654 | return die; | |
15655 | } | |
15656 | ||
3019eac3 DE |
15657 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
15658 | attributes. | |
15659 | The caller is responsible for filling in the extra attributes | |
15660 | and updating (*DIEP)->num_attrs. | |
15661 | Set DIEP to point to a newly allocated die with its information, | |
15662 | except for its child, sibling, and parent fields. | |
15663 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 15664 | |
d521ce57 | 15665 | static const gdb_byte * |
3019eac3 | 15666 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 15667 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 15668 | int *has_children, int num_extra_attrs) |
93311388 | 15669 | { |
b64f50a1 | 15670 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
15671 | struct abbrev_info *abbrev; |
15672 | struct die_info *die; | |
15673 | struct dwarf2_cu *cu = reader->cu; | |
15674 | bfd *abfd = reader->abfd; | |
15675 | ||
9c541725 | 15676 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
15677 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15678 | info_ptr += bytes_read; | |
15679 | if (!abbrev_number) | |
15680 | { | |
15681 | *diep = NULL; | |
15682 | *has_children = 0; | |
15683 | return info_ptr; | |
15684 | } | |
15685 | ||
433df2d4 | 15686 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 15687 | if (!abbrev) |
348e048f DE |
15688 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
15689 | abbrev_number, | |
15690 | bfd_get_filename (abfd)); | |
15691 | ||
3019eac3 | 15692 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 15693 | die->sect_off = sect_off; |
93311388 DE |
15694 | die->tag = abbrev->tag; |
15695 | die->abbrev = abbrev_number; | |
15696 | ||
3019eac3 DE |
15697 | /* Make the result usable. |
15698 | The caller needs to update num_attrs after adding the extra | |
15699 | attributes. */ | |
93311388 DE |
15700 | die->num_attrs = abbrev->num_attrs; |
15701 | ||
15702 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
15703 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
15704 | info_ptr); | |
93311388 DE |
15705 | |
15706 | *diep = die; | |
15707 | *has_children = abbrev->has_children; | |
15708 | return info_ptr; | |
15709 | } | |
15710 | ||
3019eac3 DE |
15711 | /* Read a die and all its attributes. |
15712 | Set DIEP to point to a newly allocated die with its information, | |
15713 | except for its child, sibling, and parent fields. | |
15714 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
15715 | ||
d521ce57 | 15716 | static const gdb_byte * |
3019eac3 | 15717 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 15718 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
15719 | int *has_children) |
15720 | { | |
d521ce57 | 15721 | const gdb_byte *result; |
bf6af496 DE |
15722 | |
15723 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
15724 | ||
b4f54984 | 15725 | if (dwarf_die_debug) |
bf6af496 DE |
15726 | { |
15727 | fprintf_unfiltered (gdb_stdlog, | |
15728 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15729 | get_section_name (reader->die_section), |
bf6af496 DE |
15730 | (unsigned) (info_ptr - reader->die_section->buffer), |
15731 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15732 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
15733 | } |
15734 | ||
15735 | return result; | |
3019eac3 | 15736 | } |
433df2d4 DE |
15737 | \f |
15738 | /* Abbreviation tables. | |
3019eac3 | 15739 | |
433df2d4 | 15740 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
15741 | stored in a separate .debug_abbrev section. Before we read any |
15742 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
15743 | in a hash table. */ |
15744 | ||
15745 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
15746 | ||
15747 | static struct abbrev_info * | |
15748 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
15749 | { | |
15750 | struct abbrev_info *abbrev; | |
15751 | ||
8d749320 | 15752 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 15753 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 15754 | |
433df2d4 DE |
15755 | return abbrev; |
15756 | } | |
15757 | ||
15758 | /* Add an abbreviation to the table. */ | |
c906108c SS |
15759 | |
15760 | static void | |
433df2d4 DE |
15761 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
15762 | unsigned int abbrev_number, | |
15763 | struct abbrev_info *abbrev) | |
15764 | { | |
15765 | unsigned int hash_number; | |
15766 | ||
15767 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15768 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
15769 | abbrev_table->abbrevs[hash_number] = abbrev; | |
15770 | } | |
dee91e82 | 15771 | |
433df2d4 DE |
15772 | /* Look up an abbrev in the table. |
15773 | Returns NULL if the abbrev is not found. */ | |
15774 | ||
15775 | static struct abbrev_info * | |
15776 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
15777 | unsigned int abbrev_number) | |
c906108c | 15778 | { |
433df2d4 DE |
15779 | unsigned int hash_number; |
15780 | struct abbrev_info *abbrev; | |
15781 | ||
15782 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15783 | abbrev = abbrev_table->abbrevs[hash_number]; | |
15784 | ||
15785 | while (abbrev) | |
15786 | { | |
15787 | if (abbrev->number == abbrev_number) | |
15788 | return abbrev; | |
15789 | abbrev = abbrev->next; | |
15790 | } | |
15791 | return NULL; | |
15792 | } | |
15793 | ||
15794 | /* Read in an abbrev table. */ | |
15795 | ||
15796 | static struct abbrev_table * | |
15797 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 15798 | sect_offset sect_off) |
433df2d4 DE |
15799 | { |
15800 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 15801 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 15802 | struct abbrev_table *abbrev_table; |
d521ce57 | 15803 | const gdb_byte *abbrev_ptr; |
c906108c SS |
15804 | struct abbrev_info *cur_abbrev; |
15805 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 15806 | unsigned int abbrev_form; |
f3dd6933 DJ |
15807 | struct attr_abbrev *cur_attrs; |
15808 | unsigned int allocated_attrs; | |
c906108c | 15809 | |
70ba0933 | 15810 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 15811 | abbrev_table->sect_off = sect_off; |
433df2d4 | 15812 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
15813 | abbrev_table->abbrevs = |
15814 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
15815 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
15816 | memset (abbrev_table->abbrevs, 0, |
15817 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 15818 | |
433df2d4 | 15819 | dwarf2_read_section (objfile, section); |
9c541725 | 15820 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
15821 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15822 | abbrev_ptr += bytes_read; | |
15823 | ||
f3dd6933 | 15824 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 15825 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 15826 | |
0963b4bd | 15827 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
15828 | while (abbrev_number) |
15829 | { | |
433df2d4 | 15830 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
15831 | |
15832 | /* read in abbrev header */ | |
15833 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
15834 | cur_abbrev->tag |
15835 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
15836 | abbrev_ptr += bytes_read; |
15837 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
15838 | abbrev_ptr += 1; | |
15839 | ||
15840 | /* now read in declarations */ | |
22d2f3ab | 15841 | for (;;) |
c906108c | 15842 | { |
43988095 JK |
15843 | LONGEST implicit_const; |
15844 | ||
22d2f3ab JK |
15845 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15846 | abbrev_ptr += bytes_read; | |
15847 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15848 | abbrev_ptr += bytes_read; | |
43988095 JK |
15849 | if (abbrev_form == DW_FORM_implicit_const) |
15850 | { | |
15851 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
15852 | &bytes_read); | |
15853 | abbrev_ptr += bytes_read; | |
15854 | } | |
15855 | else | |
15856 | { | |
15857 | /* Initialize it due to a false compiler warning. */ | |
15858 | implicit_const = -1; | |
15859 | } | |
22d2f3ab JK |
15860 | |
15861 | if (abbrev_name == 0) | |
15862 | break; | |
15863 | ||
f3dd6933 | 15864 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 15865 | { |
f3dd6933 DJ |
15866 | allocated_attrs += ATTR_ALLOC_CHUNK; |
15867 | cur_attrs | |
224c3ddb | 15868 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 15869 | } |
ae038cb0 | 15870 | |
aead7601 SM |
15871 | cur_attrs[cur_abbrev->num_attrs].name |
15872 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 15873 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 15874 | = (enum dwarf_form) abbrev_form; |
43988095 | 15875 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 15876 | ++cur_abbrev->num_attrs; |
c906108c SS |
15877 | } |
15878 | ||
8d749320 SM |
15879 | cur_abbrev->attrs = |
15880 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
15881 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
15882 | memcpy (cur_abbrev->attrs, cur_attrs, |
15883 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
15884 | ||
433df2d4 | 15885 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
15886 | |
15887 | /* Get next abbreviation. | |
15888 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
15889 | always properly terminated with an abbrev number of 0. |
15890 | Exit loop if we encounter an abbreviation which we have | |
15891 | already read (which means we are about to read the abbreviations | |
15892 | for the next compile unit) or if the end of the abbreviation | |
15893 | table is reached. */ | |
433df2d4 | 15894 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
15895 | break; |
15896 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15897 | abbrev_ptr += bytes_read; | |
433df2d4 | 15898 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
15899 | break; |
15900 | } | |
f3dd6933 DJ |
15901 | |
15902 | xfree (cur_attrs); | |
433df2d4 | 15903 | return abbrev_table; |
c906108c SS |
15904 | } |
15905 | ||
433df2d4 | 15906 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 15907 | |
c906108c | 15908 | static void |
433df2d4 | 15909 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15910 | { |
433df2d4 DE |
15911 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15912 | xfree (abbrev_table); | |
c906108c SS |
15913 | } |
15914 | ||
f4dc4d17 DE |
15915 | /* Same as abbrev_table_free but as a cleanup. |
15916 | We pass in a pointer to the pointer to the table so that we can | |
15917 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 15918 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
15919 | |
15920 | static void | |
15921 | abbrev_table_free_cleanup (void *table_ptr) | |
15922 | { | |
9a3c8263 | 15923 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
15924 | |
15925 | if (*abbrev_table_ptr != NULL) | |
15926 | abbrev_table_free (*abbrev_table_ptr); | |
15927 | *abbrev_table_ptr = NULL; | |
15928 | } | |
15929 | ||
433df2d4 DE |
15930 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15931 | ||
15932 | static void | |
15933 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15934 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15935 | { |
433df2d4 | 15936 | cu->abbrev_table = |
9c541725 | 15937 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 15938 | } |
c906108c | 15939 | |
433df2d4 | 15940 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15941 | |
433df2d4 DE |
15942 | static void |
15943 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15944 | { | |
9a3c8263 | 15945 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 15946 | |
a2ce51a0 DE |
15947 | if (cu->abbrev_table != NULL) |
15948 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15949 | /* Set this to NULL so that we SEGV if we try to read it later, |
15950 | and also because free_comp_unit verifies this is NULL. */ | |
15951 | cu->abbrev_table = NULL; | |
15952 | } | |
15953 | \f | |
72bf9492 DJ |
15954 | /* Returns nonzero if TAG represents a type that we might generate a partial |
15955 | symbol for. */ | |
15956 | ||
15957 | static int | |
15958 | is_type_tag_for_partial (int tag) | |
15959 | { | |
15960 | switch (tag) | |
15961 | { | |
15962 | #if 0 | |
15963 | /* Some types that would be reasonable to generate partial symbols for, | |
15964 | that we don't at present. */ | |
15965 | case DW_TAG_array_type: | |
15966 | case DW_TAG_file_type: | |
15967 | case DW_TAG_ptr_to_member_type: | |
15968 | case DW_TAG_set_type: | |
15969 | case DW_TAG_string_type: | |
15970 | case DW_TAG_subroutine_type: | |
15971 | #endif | |
15972 | case DW_TAG_base_type: | |
15973 | case DW_TAG_class_type: | |
680b30c7 | 15974 | case DW_TAG_interface_type: |
72bf9492 DJ |
15975 | case DW_TAG_enumeration_type: |
15976 | case DW_TAG_structure_type: | |
15977 | case DW_TAG_subrange_type: | |
15978 | case DW_TAG_typedef: | |
15979 | case DW_TAG_union_type: | |
15980 | return 1; | |
15981 | default: | |
15982 | return 0; | |
15983 | } | |
15984 | } | |
15985 | ||
15986 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
15987 | ||
15988 | static struct partial_die_info * | |
dee91e82 | 15989 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 15990 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 15991 | { |
dee91e82 | 15992 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15993 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
15994 | struct partial_die_info *part_die; |
15995 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
15996 | struct abbrev_info *abbrev; | |
15997 | unsigned int bytes_read; | |
5afb4e99 | 15998 | unsigned int load_all = 0; |
72bf9492 DJ |
15999 | int nesting_level = 1; |
16000 | ||
16001 | parent_die = NULL; | |
16002 | last_die = NULL; | |
16003 | ||
7adf1e79 DE |
16004 | gdb_assert (cu->per_cu != NULL); |
16005 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16006 | load_all = 1; |
16007 | ||
72bf9492 DJ |
16008 | cu->partial_dies |
16009 | = htab_create_alloc_ex (cu->header.length / 12, | |
16010 | partial_die_hash, | |
16011 | partial_die_eq, | |
16012 | NULL, | |
16013 | &cu->comp_unit_obstack, | |
16014 | hashtab_obstack_allocate, | |
16015 | dummy_obstack_deallocate); | |
16016 | ||
8d749320 | 16017 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16018 | |
16019 | while (1) | |
16020 | { | |
16021 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16022 | ||
16023 | /* A NULL abbrev means the end of a series of children. */ | |
16024 | if (abbrev == NULL) | |
16025 | { | |
16026 | if (--nesting_level == 0) | |
16027 | { | |
16028 | /* PART_DIE was probably the last thing allocated on the | |
16029 | comp_unit_obstack, so we could call obstack_free | |
16030 | here. We don't do that because the waste is small, | |
16031 | and will be cleaned up when we're done with this | |
16032 | compilation unit. This way, we're also more robust | |
16033 | against other users of the comp_unit_obstack. */ | |
16034 | return first_die; | |
16035 | } | |
16036 | info_ptr += bytes_read; | |
16037 | last_die = parent_die; | |
16038 | parent_die = parent_die->die_parent; | |
16039 | continue; | |
16040 | } | |
16041 | ||
98bfdba5 PA |
16042 | /* Check for template arguments. We never save these; if |
16043 | they're seen, we just mark the parent, and go on our way. */ | |
16044 | if (parent_die != NULL | |
16045 | && cu->language == language_cplus | |
16046 | && (abbrev->tag == DW_TAG_template_type_param | |
16047 | || abbrev->tag == DW_TAG_template_value_param)) | |
16048 | { | |
16049 | parent_die->has_template_arguments = 1; | |
16050 | ||
16051 | if (!load_all) | |
16052 | { | |
16053 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16054 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16055 | continue; |
16056 | } | |
16057 | } | |
16058 | ||
0d99eb77 | 16059 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16060 | Skip their other children. */ |
16061 | if (!load_all | |
16062 | && cu->language == language_cplus | |
16063 | && parent_die != NULL | |
16064 | && parent_die->tag == DW_TAG_subprogram) | |
16065 | { | |
dee91e82 | 16066 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16067 | continue; |
16068 | } | |
16069 | ||
5afb4e99 DJ |
16070 | /* Check whether this DIE is interesting enough to save. Normally |
16071 | we would not be interested in members here, but there may be | |
16072 | later variables referencing them via DW_AT_specification (for | |
16073 | static members). */ | |
16074 | if (!load_all | |
16075 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16076 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
16077 | && abbrev->tag != DW_TAG_enumerator |
16078 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 16079 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 16080 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 16081 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 16082 | && abbrev->tag != DW_TAG_module |
95554aad | 16083 | && abbrev->tag != DW_TAG_member |
74921315 KS |
16084 | && abbrev->tag != DW_TAG_imported_unit |
16085 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
16086 | { |
16087 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16088 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
16089 | continue; |
16090 | } | |
16091 | ||
dee91e82 DE |
16092 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
16093 | info_ptr); | |
72bf9492 DJ |
16094 | |
16095 | /* This two-pass algorithm for processing partial symbols has a | |
16096 | high cost in cache pressure. Thus, handle some simple cases | |
16097 | here which cover the majority of C partial symbols. DIEs | |
16098 | which neither have specification tags in them, nor could have | |
16099 | specification tags elsewhere pointing at them, can simply be | |
16100 | processed and discarded. | |
16101 | ||
16102 | This segment is also optional; scan_partial_symbols and | |
16103 | add_partial_symbol will handle these DIEs if we chain | |
16104 | them in normally. When compilers which do not emit large | |
16105 | quantities of duplicate debug information are more common, | |
16106 | this code can probably be removed. */ | |
16107 | ||
16108 | /* Any complete simple types at the top level (pretty much all | |
16109 | of them, for a language without namespaces), can be processed | |
16110 | directly. */ | |
16111 | if (parent_die == NULL | |
16112 | && part_die->has_specification == 0 | |
16113 | && part_die->is_declaration == 0 | |
d8228535 | 16114 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
16115 | || part_die->tag == DW_TAG_base_type |
16116 | || part_die->tag == DW_TAG_subrange_type)) | |
16117 | { | |
16118 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 16119 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16120 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 16121 | &objfile->static_psymbols, |
1762568f | 16122 | 0, cu->language, objfile); |
dee91e82 | 16123 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16124 | continue; |
16125 | } | |
16126 | ||
d8228535 JK |
16127 | /* The exception for DW_TAG_typedef with has_children above is |
16128 | a workaround of GCC PR debug/47510. In the case of this complaint | |
16129 | type_name_no_tag_or_error will error on such types later. | |
16130 | ||
16131 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
16132 | it could not find the child DIEs referenced later, this is checked | |
16133 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
16134 | ||
16135 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
16136 | complaint (&symfile_complaints, | |
16137 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
16138 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16139 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 16140 | |
72bf9492 DJ |
16141 | /* If we're at the second level, and we're an enumerator, and |
16142 | our parent has no specification (meaning possibly lives in a | |
16143 | namespace elsewhere), then we can add the partial symbol now | |
16144 | instead of queueing it. */ | |
16145 | if (part_die->tag == DW_TAG_enumerator | |
16146 | && parent_die != NULL | |
16147 | && parent_die->die_parent == NULL | |
16148 | && parent_die->tag == DW_TAG_enumeration_type | |
16149 | && parent_die->has_specification == 0) | |
16150 | { | |
16151 | if (part_die->name == NULL) | |
3e43a32a MS |
16152 | complaint (&symfile_complaints, |
16153 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 16154 | else if (building_psymtab) |
04a679b8 | 16155 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16156 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 16157 | cu->language == language_cplus |
bb5ed363 DE |
16158 | ? &objfile->global_psymbols |
16159 | : &objfile->static_psymbols, | |
1762568f | 16160 | 0, cu->language, objfile); |
72bf9492 | 16161 | |
dee91e82 | 16162 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16163 | continue; |
16164 | } | |
16165 | ||
16166 | /* We'll save this DIE so link it in. */ | |
16167 | part_die->die_parent = parent_die; | |
16168 | part_die->die_sibling = NULL; | |
16169 | part_die->die_child = NULL; | |
16170 | ||
16171 | if (last_die && last_die == parent_die) | |
16172 | last_die->die_child = part_die; | |
16173 | else if (last_die) | |
16174 | last_die->die_sibling = part_die; | |
16175 | ||
16176 | last_die = part_die; | |
16177 | ||
16178 | if (first_die == NULL) | |
16179 | first_die = part_die; | |
16180 | ||
16181 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
16182 | find interesting need to be in the hash table, because we | |
16183 | also have the parent/sibling/child chains; only those that we | |
16184 | might refer to by offset later during partial symbol reading. | |
16185 | ||
16186 | For now this means things that might have be the target of a | |
16187 | DW_AT_specification, DW_AT_abstract_origin, or | |
16188 | DW_AT_extension. DW_AT_extension will refer only to | |
16189 | namespaces; DW_AT_abstract_origin refers to functions (and | |
16190 | many things under the function DIE, but we do not recurse | |
16191 | into function DIEs during partial symbol reading) and | |
16192 | possibly variables as well; DW_AT_specification refers to | |
16193 | declarations. Declarations ought to have the DW_AT_declaration | |
16194 | flag. It happens that GCC forgets to put it in sometimes, but | |
16195 | only for functions, not for types. | |
16196 | ||
16197 | Adding more things than necessary to the hash table is harmless | |
16198 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
16199 | wasted time in find_partial_die, when we reread the compilation |
16200 | unit with load_all_dies set. */ | |
72bf9492 | 16201 | |
5afb4e99 | 16202 | if (load_all |
72929c62 | 16203 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 16204 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
16205 | || abbrev->tag == DW_TAG_variable |
16206 | || abbrev->tag == DW_TAG_namespace | |
16207 | || part_die->is_declaration) | |
16208 | { | |
16209 | void **slot; | |
16210 | ||
16211 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
16212 | to_underlying (part_die->sect_off), |
16213 | INSERT); | |
72bf9492 DJ |
16214 | *slot = part_die; |
16215 | } | |
16216 | ||
8d749320 | 16217 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16218 | |
16219 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 16220 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
16221 | languages we have to, so that we can get at method physnames |
16222 | to infer fully qualified class names, for DW_AT_specification, | |
16223 | and for C++ template arguments. For C++, we also look one level | |
16224 | inside functions to find template arguments (if the name of the | |
16225 | function does not already contain the template arguments). | |
bc30ff58 JB |
16226 | |
16227 | For Ada, we need to scan the children of subprograms and lexical | |
16228 | blocks as well because Ada allows the definition of nested | |
16229 | entities that could be interesting for the debugger, such as | |
16230 | nested subprograms for instance. */ | |
72bf9492 | 16231 | if (last_die->has_children |
5afb4e99 DJ |
16232 | && (load_all |
16233 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 16234 | || last_die->tag == DW_TAG_module |
72bf9492 | 16235 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
16236 | || (cu->language == language_cplus |
16237 | && last_die->tag == DW_TAG_subprogram | |
16238 | && (last_die->name == NULL | |
16239 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
16240 | || (cu->language != language_c |
16241 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 16242 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 16243 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
16244 | || last_die->tag == DW_TAG_union_type)) |
16245 | || (cu->language == language_ada | |
16246 | && (last_die->tag == DW_TAG_subprogram | |
16247 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
16248 | { |
16249 | nesting_level++; | |
16250 | parent_die = last_die; | |
16251 | continue; | |
16252 | } | |
16253 | ||
16254 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16255 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
16256 | |
16257 | /* Back to the top, do it again. */ | |
16258 | } | |
16259 | } | |
16260 | ||
c906108c SS |
16261 | /* Read a minimal amount of information into the minimal die structure. */ |
16262 | ||
d521ce57 | 16263 | static const gdb_byte * |
dee91e82 DE |
16264 | read_partial_die (const struct die_reader_specs *reader, |
16265 | struct partial_die_info *part_die, | |
16266 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 16267 | const gdb_byte *info_ptr) |
c906108c | 16268 | { |
dee91e82 | 16269 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16270 | struct objfile *objfile = cu->objfile; |
d521ce57 | 16271 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 16272 | unsigned int i; |
c906108c | 16273 | struct attribute attr; |
c5aa993b | 16274 | int has_low_pc_attr = 0; |
c906108c | 16275 | int has_high_pc_attr = 0; |
91da1414 | 16276 | int high_pc_relative = 0; |
c906108c | 16277 | |
72bf9492 | 16278 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 16279 | |
9c541725 | 16280 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
16281 | |
16282 | info_ptr += abbrev_len; | |
16283 | ||
16284 | if (abbrev == NULL) | |
16285 | return info_ptr; | |
16286 | ||
c906108c SS |
16287 | part_die->tag = abbrev->tag; |
16288 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
16289 | |
16290 | for (i = 0; i < abbrev->num_attrs; ++i) | |
16291 | { | |
dee91e82 | 16292 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
16293 | |
16294 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 16295 | partial symbol table. */ |
c906108c SS |
16296 | switch (attr.name) |
16297 | { | |
16298 | case DW_AT_name: | |
71c25dea TT |
16299 | switch (part_die->tag) |
16300 | { | |
16301 | case DW_TAG_compile_unit: | |
95554aad | 16302 | case DW_TAG_partial_unit: |
348e048f | 16303 | case DW_TAG_type_unit: |
71c25dea TT |
16304 | /* Compilation units have a DW_AT_name that is a filename, not |
16305 | a source language identifier. */ | |
16306 | case DW_TAG_enumeration_type: | |
16307 | case DW_TAG_enumerator: | |
16308 | /* These tags always have simple identifiers already; no need | |
16309 | to canonicalize them. */ | |
16310 | part_die->name = DW_STRING (&attr); | |
16311 | break; | |
16312 | default: | |
16313 | part_die->name | |
16314 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 16315 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
16316 | break; |
16317 | } | |
c906108c | 16318 | break; |
31ef98ae | 16319 | case DW_AT_linkage_name: |
c906108c | 16320 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
16321 | /* Note that both forms of linkage name might appear. We |
16322 | assume they will be the same, and we only store the last | |
16323 | one we see. */ | |
94af9270 KS |
16324 | if (cu->language == language_ada) |
16325 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 16326 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
16327 | break; |
16328 | case DW_AT_low_pc: | |
16329 | has_low_pc_attr = 1; | |
31aa7e4e | 16330 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
16331 | break; |
16332 | case DW_AT_high_pc: | |
16333 | has_high_pc_attr = 1; | |
31aa7e4e JB |
16334 | part_die->highpc = attr_value_as_address (&attr); |
16335 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
16336 | high_pc_relative = 1; | |
c906108c SS |
16337 | break; |
16338 | case DW_AT_location: | |
0963b4bd | 16339 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
16340 | if (attr_form_is_block (&attr)) |
16341 | { | |
95554aad | 16342 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 16343 | } |
3690dd37 | 16344 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 16345 | { |
4d3c2250 | 16346 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
16347 | } |
16348 | else | |
16349 | { | |
4d3c2250 KB |
16350 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
16351 | "partial symbol information"); | |
8e19ed76 | 16352 | } |
c906108c | 16353 | break; |
c906108c SS |
16354 | case DW_AT_external: |
16355 | part_die->is_external = DW_UNSND (&attr); | |
16356 | break; | |
16357 | case DW_AT_declaration: | |
16358 | part_die->is_declaration = DW_UNSND (&attr); | |
16359 | break; | |
16360 | case DW_AT_type: | |
16361 | part_die->has_type = 1; | |
16362 | break; | |
16363 | case DW_AT_abstract_origin: | |
16364 | case DW_AT_specification: | |
72bf9492 DJ |
16365 | case DW_AT_extension: |
16366 | part_die->has_specification = 1; | |
c764a876 | 16367 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16368 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16369 | || cu->per_cu->is_dwz); | |
c906108c SS |
16370 | break; |
16371 | case DW_AT_sibling: | |
16372 | /* Ignore absolute siblings, they might point outside of | |
16373 | the current compile unit. */ | |
16374 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
16375 | complaint (&symfile_complaints, |
16376 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 16377 | else |
b9502d3f | 16378 | { |
9c541725 PA |
16379 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
16380 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
16381 | |
16382 | if (sibling_ptr < info_ptr) | |
16383 | complaint (&symfile_complaints, | |
16384 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
16385 | else if (sibling_ptr > reader->buffer_end) |
16386 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
16387 | else |
16388 | part_die->sibling = sibling_ptr; | |
16389 | } | |
c906108c | 16390 | break; |
fa4028e9 JB |
16391 | case DW_AT_byte_size: |
16392 | part_die->has_byte_size = 1; | |
16393 | break; | |
ff908ebf AW |
16394 | case DW_AT_const_value: |
16395 | part_die->has_const_value = 1; | |
16396 | break; | |
68511cec CES |
16397 | case DW_AT_calling_convention: |
16398 | /* DWARF doesn't provide a way to identify a program's source-level | |
16399 | entry point. DW_AT_calling_convention attributes are only meant | |
16400 | to describe functions' calling conventions. | |
16401 | ||
16402 | However, because it's a necessary piece of information in | |
0c1b455e TT |
16403 | Fortran, and before DWARF 4 DW_CC_program was the only |
16404 | piece of debugging information whose definition refers to | |
16405 | a 'main program' at all, several compilers marked Fortran | |
16406 | main programs with DW_CC_program --- even when those | |
16407 | functions use the standard calling conventions. | |
16408 | ||
16409 | Although DWARF now specifies a way to provide this | |
16410 | information, we support this practice for backward | |
16411 | compatibility. */ | |
68511cec | 16412 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
16413 | && cu->language == language_fortran) |
16414 | part_die->main_subprogram = 1; | |
68511cec | 16415 | break; |
481860b3 GB |
16416 | case DW_AT_inline: |
16417 | if (DW_UNSND (&attr) == DW_INL_inlined | |
16418 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
16419 | part_die->may_be_inlined = 1; | |
16420 | break; | |
95554aad TT |
16421 | |
16422 | case DW_AT_import: | |
16423 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 16424 | { |
9c541725 | 16425 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16426 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16427 | || cu->per_cu->is_dwz); | |
16428 | } | |
95554aad TT |
16429 | break; |
16430 | ||
0c1b455e TT |
16431 | case DW_AT_main_subprogram: |
16432 | part_die->main_subprogram = DW_UNSND (&attr); | |
16433 | break; | |
16434 | ||
c906108c SS |
16435 | default: |
16436 | break; | |
16437 | } | |
16438 | } | |
16439 | ||
91da1414 MW |
16440 | if (high_pc_relative) |
16441 | part_die->highpc += part_die->lowpc; | |
16442 | ||
9373cf26 JK |
16443 | if (has_low_pc_attr && has_high_pc_attr) |
16444 | { | |
16445 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
16446 | eliminate duplicate copies of functions and vtables and such. | |
16447 | The linker will arbitrarily choose one and discard the others. | |
16448 | The AT_*_pc values for such functions refer to local labels in | |
16449 | these sections. If the section from that file was discarded, the | |
16450 | labels are not in the output, so the relocs get a value of 0. | |
16451 | If this is a discarded function, mark the pc bounds as invalid, | |
16452 | so that GDB will ignore it. */ | |
16453 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
16454 | { | |
bb5ed363 | 16455 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16456 | |
16457 | complaint (&symfile_complaints, | |
16458 | _("DW_AT_low_pc %s is zero " | |
16459 | "for DIE at 0x%x [in module %s]"), | |
16460 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 16461 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
16462 | } |
16463 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
16464 | else if (part_die->lowpc >= part_die->highpc) | |
16465 | { | |
bb5ed363 | 16466 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16467 | |
16468 | complaint (&symfile_complaints, | |
16469 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
16470 | "for DIE at 0x%x [in module %s]"), | |
16471 | paddress (gdbarch, part_die->lowpc), | |
16472 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
16473 | to_underlying (part_die->sect_off), |
16474 | objfile_name (objfile)); | |
9373cf26 JK |
16475 | } |
16476 | else | |
16477 | part_die->has_pc_info = 1; | |
16478 | } | |
85cbf3d3 | 16479 | |
c906108c SS |
16480 | return info_ptr; |
16481 | } | |
16482 | ||
72bf9492 DJ |
16483 | /* Find a cached partial DIE at OFFSET in CU. */ |
16484 | ||
16485 | static struct partial_die_info * | |
9c541725 | 16486 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
16487 | { |
16488 | struct partial_die_info *lookup_die = NULL; | |
16489 | struct partial_die_info part_die; | |
16490 | ||
9c541725 | 16491 | part_die.sect_off = sect_off; |
9a3c8263 SM |
16492 | lookup_die = ((struct partial_die_info *) |
16493 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 16494 | to_underlying (sect_off))); |
72bf9492 | 16495 | |
72bf9492 DJ |
16496 | return lookup_die; |
16497 | } | |
16498 | ||
348e048f DE |
16499 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
16500 | except in the case of .debug_types DIEs which do not reference | |
16501 | outside their CU (they do however referencing other types via | |
55f1336d | 16502 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
16503 | |
16504 | static struct partial_die_info * | |
9c541725 | 16505 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 16506 | { |
bb5ed363 | 16507 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
16508 | struct dwarf2_per_cu_data *per_cu = NULL; |
16509 | struct partial_die_info *pd = NULL; | |
72bf9492 | 16510 | |
36586728 | 16511 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 16512 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 16513 | { |
9c541725 | 16514 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
16515 | if (pd != NULL) |
16516 | return pd; | |
0d99eb77 DE |
16517 | /* We missed recording what we needed. |
16518 | Load all dies and try again. */ | |
16519 | per_cu = cu->per_cu; | |
5afb4e99 | 16520 | } |
0d99eb77 DE |
16521 | else |
16522 | { | |
16523 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 16524 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 16525 | { |
9c541725 PA |
16526 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
16527 | " external reference to offset 0x%x [in module %s].\n"), | |
16528 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
16529 | bfd_get_filename (objfile->obfd)); |
16530 | } | |
9c541725 | 16531 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 16532 | objfile); |
72bf9492 | 16533 | |
0d99eb77 DE |
16534 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
16535 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 16536 | |
0d99eb77 | 16537 | per_cu->cu->last_used = 0; |
9c541725 | 16538 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 16539 | } |
5afb4e99 | 16540 | |
dee91e82 DE |
16541 | /* If we didn't find it, and not all dies have been loaded, |
16542 | load them all and try again. */ | |
16543 | ||
5afb4e99 DJ |
16544 | if (pd == NULL && per_cu->load_all_dies == 0) |
16545 | { | |
5afb4e99 | 16546 | per_cu->load_all_dies = 1; |
fd820528 DE |
16547 | |
16548 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
16549 | THIS_CU->cu may already be in use. So we can't just free it and | |
16550 | replace its DIEs with the ones we read in. Instead, we leave those | |
16551 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
16552 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
16553 | set. */ | |
dee91e82 | 16554 | load_partial_comp_unit (per_cu); |
5afb4e99 | 16555 | |
9c541725 | 16556 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
16557 | } |
16558 | ||
16559 | if (pd == NULL) | |
16560 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
16561 | _("could not find partial DIE 0x%x " |
16562 | "in cache [from module %s]\n"), | |
9c541725 | 16563 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 16564 | return pd; |
72bf9492 DJ |
16565 | } |
16566 | ||
abc72ce4 DE |
16567 | /* See if we can figure out if the class lives in a namespace. We do |
16568 | this by looking for a member function; its demangled name will | |
16569 | contain namespace info, if there is any. */ | |
16570 | ||
16571 | static void | |
16572 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
16573 | struct dwarf2_cu *cu) | |
16574 | { | |
16575 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
16576 | what template types look like, because the demangler | |
16577 | frequently doesn't give the same name as the debug info. We | |
16578 | could fix this by only using the demangled name to get the | |
16579 | prefix (but see comment in read_structure_type). */ | |
16580 | ||
16581 | struct partial_die_info *real_pdi; | |
16582 | struct partial_die_info *child_pdi; | |
16583 | ||
16584 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
16585 | we should not do this. We'll prepend the parent's fully qualified | |
16586 | name when we create the partial symbol. */ | |
16587 | ||
16588 | real_pdi = struct_pdi; | |
16589 | while (real_pdi->has_specification) | |
36586728 TT |
16590 | real_pdi = find_partial_die (real_pdi->spec_offset, |
16591 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
16592 | |
16593 | if (real_pdi->die_parent != NULL) | |
16594 | return; | |
16595 | ||
16596 | for (child_pdi = struct_pdi->die_child; | |
16597 | child_pdi != NULL; | |
16598 | child_pdi = child_pdi->die_sibling) | |
16599 | { | |
16600 | if (child_pdi->tag == DW_TAG_subprogram | |
16601 | && child_pdi->linkage_name != NULL) | |
16602 | { | |
16603 | char *actual_class_name | |
16604 | = language_class_name_from_physname (cu->language_defn, | |
16605 | child_pdi->linkage_name); | |
16606 | if (actual_class_name != NULL) | |
16607 | { | |
16608 | struct_pdi->name | |
224c3ddb SM |
16609 | = ((const char *) |
16610 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16611 | actual_class_name, | |
16612 | strlen (actual_class_name))); | |
abc72ce4 DE |
16613 | xfree (actual_class_name); |
16614 | } | |
16615 | break; | |
16616 | } | |
16617 | } | |
16618 | } | |
16619 | ||
72bf9492 DJ |
16620 | /* Adjust PART_DIE before generating a symbol for it. This function |
16621 | may set the is_external flag or change the DIE's name. */ | |
16622 | ||
16623 | static void | |
16624 | fixup_partial_die (struct partial_die_info *part_die, | |
16625 | struct dwarf2_cu *cu) | |
16626 | { | |
abc72ce4 DE |
16627 | /* Once we've fixed up a die, there's no point in doing so again. |
16628 | This also avoids a memory leak if we were to call | |
16629 | guess_partial_die_structure_name multiple times. */ | |
16630 | if (part_die->fixup_called) | |
16631 | return; | |
16632 | ||
72bf9492 DJ |
16633 | /* If we found a reference attribute and the DIE has no name, try |
16634 | to find a name in the referred to DIE. */ | |
16635 | ||
16636 | if (part_die->name == NULL && part_die->has_specification) | |
16637 | { | |
16638 | struct partial_die_info *spec_die; | |
72bf9492 | 16639 | |
36586728 TT |
16640 | spec_die = find_partial_die (part_die->spec_offset, |
16641 | part_die->spec_is_dwz, cu); | |
72bf9492 | 16642 | |
10b3939b | 16643 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
16644 | |
16645 | if (spec_die->name) | |
16646 | { | |
16647 | part_die->name = spec_die->name; | |
16648 | ||
16649 | /* Copy DW_AT_external attribute if it is set. */ | |
16650 | if (spec_die->is_external) | |
16651 | part_die->is_external = spec_die->is_external; | |
16652 | } | |
16653 | } | |
16654 | ||
16655 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
16656 | |
16657 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 16658 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 16659 | |
abc72ce4 DE |
16660 | /* If there is no parent die to provide a namespace, and there are |
16661 | children, see if we can determine the namespace from their linkage | |
122d1940 | 16662 | name. */ |
abc72ce4 | 16663 | if (cu->language == language_cplus |
8b70b953 | 16664 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16665 | && part_die->die_parent == NULL |
16666 | && part_die->has_children | |
16667 | && (part_die->tag == DW_TAG_class_type | |
16668 | || part_die->tag == DW_TAG_structure_type | |
16669 | || part_die->tag == DW_TAG_union_type)) | |
16670 | guess_partial_die_structure_name (part_die, cu); | |
16671 | ||
53832f31 TT |
16672 | /* GCC might emit a nameless struct or union that has a linkage |
16673 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16674 | if (part_die->name == NULL | |
96408a79 SA |
16675 | && (part_die->tag == DW_TAG_class_type |
16676 | || part_die->tag == DW_TAG_interface_type | |
16677 | || part_die->tag == DW_TAG_structure_type | |
16678 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
16679 | && part_die->linkage_name != NULL) |
16680 | { | |
16681 | char *demangled; | |
16682 | ||
8de20a37 | 16683 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
16684 | if (demangled) |
16685 | { | |
96408a79 SA |
16686 | const char *base; |
16687 | ||
16688 | /* Strip any leading namespaces/classes, keep only the base name. | |
16689 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16690 | base = strrchr (demangled, ':'); | |
16691 | if (base && base > demangled && base[-1] == ':') | |
16692 | base++; | |
16693 | else | |
16694 | base = demangled; | |
16695 | ||
34a68019 | 16696 | part_die->name |
224c3ddb SM |
16697 | = ((const char *) |
16698 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16699 | base, strlen (base))); | |
53832f31 TT |
16700 | xfree (demangled); |
16701 | } | |
16702 | } | |
16703 | ||
abc72ce4 | 16704 | part_die->fixup_called = 1; |
72bf9492 DJ |
16705 | } |
16706 | ||
a8329558 | 16707 | /* Read an attribute value described by an attribute form. */ |
c906108c | 16708 | |
d521ce57 | 16709 | static const gdb_byte * |
dee91e82 DE |
16710 | read_attribute_value (const struct die_reader_specs *reader, |
16711 | struct attribute *attr, unsigned form, | |
43988095 | 16712 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 16713 | { |
dee91e82 | 16714 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
16715 | struct objfile *objfile = cu->objfile; |
16716 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 16717 | bfd *abfd = reader->abfd; |
e7c27a73 | 16718 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16719 | unsigned int bytes_read; |
16720 | struct dwarf_block *blk; | |
16721 | ||
aead7601 | 16722 | attr->form = (enum dwarf_form) form; |
a8329558 | 16723 | switch (form) |
c906108c | 16724 | { |
c906108c | 16725 | case DW_FORM_ref_addr: |
ae411497 | 16726 | if (cu->header.version == 2) |
4568ecf9 | 16727 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 16728 | else |
4568ecf9 DE |
16729 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
16730 | &cu->header, &bytes_read); | |
ae411497 TT |
16731 | info_ptr += bytes_read; |
16732 | break; | |
36586728 TT |
16733 | case DW_FORM_GNU_ref_alt: |
16734 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16735 | info_ptr += bytes_read; | |
16736 | break; | |
ae411497 | 16737 | case DW_FORM_addr: |
e7c27a73 | 16738 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 16739 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 16740 | info_ptr += bytes_read; |
c906108c SS |
16741 | break; |
16742 | case DW_FORM_block2: | |
7b5a2f43 | 16743 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16744 | blk->size = read_2_bytes (abfd, info_ptr); |
16745 | info_ptr += 2; | |
16746 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16747 | info_ptr += blk->size; | |
16748 | DW_BLOCK (attr) = blk; | |
16749 | break; | |
16750 | case DW_FORM_block4: | |
7b5a2f43 | 16751 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16752 | blk->size = read_4_bytes (abfd, info_ptr); |
16753 | info_ptr += 4; | |
16754 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16755 | info_ptr += blk->size; | |
16756 | DW_BLOCK (attr) = blk; | |
16757 | break; | |
16758 | case DW_FORM_data2: | |
16759 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
16760 | info_ptr += 2; | |
16761 | break; | |
16762 | case DW_FORM_data4: | |
16763 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
16764 | info_ptr += 4; | |
16765 | break; | |
16766 | case DW_FORM_data8: | |
16767 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
16768 | info_ptr += 8; | |
16769 | break; | |
0224619f JK |
16770 | case DW_FORM_data16: |
16771 | blk = dwarf_alloc_block (cu); | |
16772 | blk->size = 16; | |
16773 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
16774 | info_ptr += 16; | |
16775 | DW_BLOCK (attr) = blk; | |
16776 | break; | |
2dc7f7b3 TT |
16777 | case DW_FORM_sec_offset: |
16778 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16779 | info_ptr += bytes_read; | |
16780 | break; | |
c906108c | 16781 | case DW_FORM_string: |
9b1c24c8 | 16782 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 16783 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
16784 | info_ptr += bytes_read; |
16785 | break; | |
4bdf3d34 | 16786 | case DW_FORM_strp: |
36586728 TT |
16787 | if (!cu->per_cu->is_dwz) |
16788 | { | |
16789 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
16790 | &bytes_read); | |
16791 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16792 | info_ptr += bytes_read; | |
16793 | break; | |
16794 | } | |
16795 | /* FALLTHROUGH */ | |
43988095 JK |
16796 | case DW_FORM_line_strp: |
16797 | if (!cu->per_cu->is_dwz) | |
16798 | { | |
16799 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
16800 | cu_header, &bytes_read); | |
16801 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16802 | info_ptr += bytes_read; | |
16803 | break; | |
16804 | } | |
16805 | /* FALLTHROUGH */ | |
36586728 TT |
16806 | case DW_FORM_GNU_strp_alt: |
16807 | { | |
16808 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16809 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
16810 | &bytes_read); | |
16811 | ||
16812 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
16813 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16814 | info_ptr += bytes_read; | |
16815 | } | |
4bdf3d34 | 16816 | break; |
2dc7f7b3 | 16817 | case DW_FORM_exprloc: |
c906108c | 16818 | case DW_FORM_block: |
7b5a2f43 | 16819 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16820 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16821 | info_ptr += bytes_read; | |
16822 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16823 | info_ptr += blk->size; | |
16824 | DW_BLOCK (attr) = blk; | |
16825 | break; | |
16826 | case DW_FORM_block1: | |
7b5a2f43 | 16827 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16828 | blk->size = read_1_byte (abfd, info_ptr); |
16829 | info_ptr += 1; | |
16830 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16831 | info_ptr += blk->size; | |
16832 | DW_BLOCK (attr) = blk; | |
16833 | break; | |
16834 | case DW_FORM_data1: | |
16835 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16836 | info_ptr += 1; | |
16837 | break; | |
16838 | case DW_FORM_flag: | |
16839 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16840 | info_ptr += 1; | |
16841 | break; | |
2dc7f7b3 TT |
16842 | case DW_FORM_flag_present: |
16843 | DW_UNSND (attr) = 1; | |
16844 | break; | |
c906108c SS |
16845 | case DW_FORM_sdata: |
16846 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16847 | info_ptr += bytes_read; | |
16848 | break; | |
16849 | case DW_FORM_udata: | |
16850 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16851 | info_ptr += bytes_read; | |
16852 | break; | |
16853 | case DW_FORM_ref1: | |
9c541725 | 16854 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16855 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
16856 | info_ptr += 1; |
16857 | break; | |
16858 | case DW_FORM_ref2: | |
9c541725 | 16859 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16860 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
16861 | info_ptr += 2; |
16862 | break; | |
16863 | case DW_FORM_ref4: | |
9c541725 | 16864 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16865 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
16866 | info_ptr += 4; |
16867 | break; | |
613e1657 | 16868 | case DW_FORM_ref8: |
9c541725 | 16869 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16870 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
16871 | info_ptr += 8; |
16872 | break; | |
55f1336d | 16873 | case DW_FORM_ref_sig8: |
ac9ec31b | 16874 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
16875 | info_ptr += 8; |
16876 | break; | |
c906108c | 16877 | case DW_FORM_ref_udata: |
9c541725 | 16878 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16879 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
16880 | info_ptr += bytes_read; |
16881 | break; | |
c906108c | 16882 | case DW_FORM_indirect: |
a8329558 KW |
16883 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16884 | info_ptr += bytes_read; | |
43988095 JK |
16885 | if (form == DW_FORM_implicit_const) |
16886 | { | |
16887 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16888 | info_ptr += bytes_read; | |
16889 | } | |
16890 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
16891 | info_ptr); | |
16892 | break; | |
16893 | case DW_FORM_implicit_const: | |
16894 | DW_SND (attr) = implicit_const; | |
a8329558 | 16895 | break; |
3019eac3 DE |
16896 | case DW_FORM_GNU_addr_index: |
16897 | if (reader->dwo_file == NULL) | |
16898 | { | |
16899 | /* For now flag a hard error. | |
16900 | Later we can turn this into a complaint. */ | |
16901 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16902 | dwarf_form_name (form), | |
16903 | bfd_get_filename (abfd)); | |
16904 | } | |
16905 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
16906 | info_ptr += bytes_read; | |
16907 | break; | |
16908 | case DW_FORM_GNU_str_index: | |
16909 | if (reader->dwo_file == NULL) | |
16910 | { | |
16911 | /* For now flag a hard error. | |
16912 | Later we can turn this into a complaint if warranted. */ | |
16913 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16914 | dwarf_form_name (form), | |
16915 | bfd_get_filename (abfd)); | |
16916 | } | |
16917 | { | |
16918 | ULONGEST str_index = | |
16919 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16920 | ||
342587c4 | 16921 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
16922 | DW_STRING_IS_CANONICAL (attr) = 0; |
16923 | info_ptr += bytes_read; | |
16924 | } | |
16925 | break; | |
c906108c | 16926 | default: |
8a3fe4f8 | 16927 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
16928 | dwarf_form_name (form), |
16929 | bfd_get_filename (abfd)); | |
c906108c | 16930 | } |
28e94949 | 16931 | |
36586728 | 16932 | /* Super hack. */ |
7771576e | 16933 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
16934 | attr->form = DW_FORM_GNU_ref_alt; |
16935 | ||
28e94949 JB |
16936 | /* We have seen instances where the compiler tried to emit a byte |
16937 | size attribute of -1 which ended up being encoded as an unsigned | |
16938 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
16939 | an object of this size seems pretty unlikely so we can relatively | |
16940 | safely treat these cases as if the size attribute was invalid and | |
16941 | treat them as zero by default. */ | |
16942 | if (attr->name == DW_AT_byte_size | |
16943 | && form == DW_FORM_data4 | |
16944 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
16945 | { |
16946 | complaint | |
16947 | (&symfile_complaints, | |
43bbcdc2 PH |
16948 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
16949 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
16950 | DW_UNSND (attr) = 0; |
16951 | } | |
28e94949 | 16952 | |
c906108c SS |
16953 | return info_ptr; |
16954 | } | |
16955 | ||
a8329558 KW |
16956 | /* Read an attribute described by an abbreviated attribute. */ |
16957 | ||
d521ce57 | 16958 | static const gdb_byte * |
dee91e82 DE |
16959 | read_attribute (const struct die_reader_specs *reader, |
16960 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 16961 | const gdb_byte *info_ptr) |
a8329558 KW |
16962 | { |
16963 | attr->name = abbrev->name; | |
43988095 JK |
16964 | return read_attribute_value (reader, attr, abbrev->form, |
16965 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
16966 | } |
16967 | ||
0963b4bd | 16968 | /* Read dwarf information from a buffer. */ |
c906108c SS |
16969 | |
16970 | static unsigned int | |
a1855c1d | 16971 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16972 | { |
fe1b8b76 | 16973 | return bfd_get_8 (abfd, buf); |
c906108c SS |
16974 | } |
16975 | ||
16976 | static int | |
a1855c1d | 16977 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16978 | { |
fe1b8b76 | 16979 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
16980 | } |
16981 | ||
16982 | static unsigned int | |
a1855c1d | 16983 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16984 | { |
fe1b8b76 | 16985 | return bfd_get_16 (abfd, buf); |
c906108c SS |
16986 | } |
16987 | ||
21ae7a4d | 16988 | static int |
a1855c1d | 16989 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16990 | { |
16991 | return bfd_get_signed_16 (abfd, buf); | |
16992 | } | |
16993 | ||
c906108c | 16994 | static unsigned int |
a1855c1d | 16995 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16996 | { |
fe1b8b76 | 16997 | return bfd_get_32 (abfd, buf); |
c906108c SS |
16998 | } |
16999 | ||
21ae7a4d | 17000 | static int |
a1855c1d | 17001 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17002 | { |
17003 | return bfd_get_signed_32 (abfd, buf); | |
17004 | } | |
17005 | ||
93311388 | 17006 | static ULONGEST |
a1855c1d | 17007 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17008 | { |
fe1b8b76 | 17009 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17010 | } |
17011 | ||
17012 | static CORE_ADDR | |
d521ce57 | 17013 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17014 | unsigned int *bytes_read) |
c906108c | 17015 | { |
e7c27a73 | 17016 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17017 | CORE_ADDR retval = 0; |
17018 | ||
107d2387 | 17019 | if (cu_header->signed_addr_p) |
c906108c | 17020 | { |
107d2387 AC |
17021 | switch (cu_header->addr_size) |
17022 | { | |
17023 | case 2: | |
fe1b8b76 | 17024 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17025 | break; |
17026 | case 4: | |
fe1b8b76 | 17027 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17028 | break; |
17029 | case 8: | |
fe1b8b76 | 17030 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17031 | break; |
17032 | default: | |
8e65ff28 | 17033 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17034 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17035 | bfd_get_filename (abfd)); |
107d2387 AC |
17036 | } |
17037 | } | |
17038 | else | |
17039 | { | |
17040 | switch (cu_header->addr_size) | |
17041 | { | |
17042 | case 2: | |
fe1b8b76 | 17043 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17044 | break; |
17045 | case 4: | |
fe1b8b76 | 17046 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17047 | break; |
17048 | case 8: | |
fe1b8b76 | 17049 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17050 | break; |
17051 | default: | |
8e65ff28 | 17052 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17053 | _("read_address: bad switch, " |
17054 | "unsigned [in module %s]"), | |
659b0389 | 17055 | bfd_get_filename (abfd)); |
107d2387 | 17056 | } |
c906108c | 17057 | } |
64367e0a | 17058 | |
107d2387 AC |
17059 | *bytes_read = cu_header->addr_size; |
17060 | return retval; | |
c906108c SS |
17061 | } |
17062 | ||
f7ef9339 | 17063 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17064 | specification allows the initial length to take up either 4 bytes |
17065 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17066 | bytes describe the length and all offsets will be 8 bytes in length | |
17067 | instead of 4. | |
17068 | ||
f7ef9339 KB |
17069 | An older, non-standard 64-bit format is also handled by this |
17070 | function. The older format in question stores the initial length | |
17071 | as an 8-byte quantity without an escape value. Lengths greater | |
17072 | than 2^32 aren't very common which means that the initial 4 bytes | |
17073 | is almost always zero. Since a length value of zero doesn't make | |
17074 | sense for the 32-bit format, this initial zero can be considered to | |
17075 | be an escape value which indicates the presence of the older 64-bit | |
17076 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
17077 | greater than 4GB. If it becomes necessary to handle lengths |
17078 | somewhat larger than 4GB, we could allow other small values (such | |
17079 | as the non-sensical values of 1, 2, and 3) to also be used as | |
17080 | escape values indicating the presence of the old format. | |
f7ef9339 | 17081 | |
917c78fc MK |
17082 | The value returned via bytes_read should be used to increment the |
17083 | relevant pointer after calling read_initial_length(). | |
c764a876 | 17084 | |
613e1657 KB |
17085 | [ Note: read_initial_length() and read_offset() are based on the |
17086 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 17087 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
17088 | from: |
17089 | ||
f7ef9339 | 17090 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 17091 | |
613e1657 KB |
17092 | This document is only a draft and is subject to change. (So beware.) |
17093 | ||
f7ef9339 | 17094 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
17095 | determined empirically by examining 64-bit ELF files produced by |
17096 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
17097 | |
17098 | - Kevin, July 16, 2002 | |
613e1657 KB |
17099 | ] */ |
17100 | ||
17101 | static LONGEST | |
d521ce57 | 17102 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 17103 | { |
fe1b8b76 | 17104 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 17105 | |
dd373385 | 17106 | if (length == 0xffffffff) |
613e1657 | 17107 | { |
fe1b8b76 | 17108 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 17109 | *bytes_read = 12; |
613e1657 | 17110 | } |
dd373385 | 17111 | else if (length == 0) |
f7ef9339 | 17112 | { |
dd373385 | 17113 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 17114 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 17115 | *bytes_read = 8; |
f7ef9339 | 17116 | } |
613e1657 KB |
17117 | else |
17118 | { | |
17119 | *bytes_read = 4; | |
613e1657 KB |
17120 | } |
17121 | ||
c764a876 DE |
17122 | return length; |
17123 | } | |
dd373385 | 17124 | |
c764a876 DE |
17125 | /* Cover function for read_initial_length. |
17126 | Returns the length of the object at BUF, and stores the size of the | |
17127 | initial length in *BYTES_READ and stores the size that offsets will be in | |
17128 | *OFFSET_SIZE. | |
17129 | If the initial length size is not equivalent to that specified in | |
17130 | CU_HEADER then issue a complaint. | |
17131 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 17132 | |
c764a876 | 17133 | static LONGEST |
d521ce57 | 17134 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
17135 | const struct comp_unit_head *cu_header, |
17136 | unsigned int *bytes_read, | |
17137 | unsigned int *offset_size) | |
17138 | { | |
17139 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
17140 | ||
17141 | gdb_assert (cu_header->initial_length_size == 4 | |
17142 | || cu_header->initial_length_size == 8 | |
17143 | || cu_header->initial_length_size == 12); | |
17144 | ||
17145 | if (cu_header->initial_length_size != *bytes_read) | |
17146 | complaint (&symfile_complaints, | |
17147 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 17148 | |
c764a876 | 17149 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 17150 | return length; |
613e1657 KB |
17151 | } |
17152 | ||
17153 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 17154 | given by cu_header->offset_size. */ |
613e1657 KB |
17155 | |
17156 | static LONGEST | |
d521ce57 TT |
17157 | read_offset (bfd *abfd, const gdb_byte *buf, |
17158 | const struct comp_unit_head *cu_header, | |
891d2f0b | 17159 | unsigned int *bytes_read) |
c764a876 DE |
17160 | { |
17161 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 17162 | |
c764a876 DE |
17163 | *bytes_read = cu_header->offset_size; |
17164 | return offset; | |
17165 | } | |
17166 | ||
17167 | /* Read an offset from the data stream. */ | |
17168 | ||
17169 | static LONGEST | |
d521ce57 | 17170 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
17171 | { |
17172 | LONGEST retval = 0; | |
17173 | ||
c764a876 | 17174 | switch (offset_size) |
613e1657 KB |
17175 | { |
17176 | case 4: | |
fe1b8b76 | 17177 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
17178 | break; |
17179 | case 8: | |
fe1b8b76 | 17180 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
17181 | break; |
17182 | default: | |
8e65ff28 | 17183 | internal_error (__FILE__, __LINE__, |
c764a876 | 17184 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 17185 | bfd_get_filename (abfd)); |
613e1657 KB |
17186 | } |
17187 | ||
917c78fc | 17188 | return retval; |
613e1657 KB |
17189 | } |
17190 | ||
d521ce57 TT |
17191 | static const gdb_byte * |
17192 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
17193 | { |
17194 | /* If the size of a host char is 8 bits, we can return a pointer | |
17195 | to the buffer, otherwise we have to copy the data to a buffer | |
17196 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17197 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 17198 | return buf; |
c906108c SS |
17199 | } |
17200 | ||
d521ce57 TT |
17201 | static const char * |
17202 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
17203 | unsigned int *bytes_read_ptr) | |
c906108c SS |
17204 | { |
17205 | /* If the size of a host char is 8 bits, we can return a pointer | |
17206 | to the string, otherwise we have to copy the string to a buffer | |
17207 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17208 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
17209 | if (*buf == '\0') |
17210 | { | |
17211 | *bytes_read_ptr = 1; | |
17212 | return NULL; | |
17213 | } | |
d521ce57 TT |
17214 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
17215 | return (const char *) buf; | |
4bdf3d34 JJ |
17216 | } |
17217 | ||
43988095 JK |
17218 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
17219 | reporting strings FORM_NAME and SECT_NAME. */ | |
17220 | ||
d521ce57 | 17221 | static const char * |
43988095 JK |
17222 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
17223 | struct dwarf2_section_info *sect, | |
17224 | const char *form_name, | |
17225 | const char *sect_name) | |
17226 | { | |
17227 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
17228 | if (sect->buffer == NULL) | |
17229 | error (_("%s used without %s section [in module %s]"), | |
17230 | form_name, sect_name, bfd_get_filename (abfd)); | |
17231 | if (str_offset >= sect->size) | |
17232 | error (_("%s pointing outside of %s section [in module %s]"), | |
17233 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 17234 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 17235 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 17236 | return NULL; |
43988095 JK |
17237 | return (const char *) (sect->buffer + str_offset); |
17238 | } | |
17239 | ||
17240 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
17241 | ||
17242 | static const char * | |
17243 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17244 | { | |
17245 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17246 | &dwarf2_per_objfile->str, | |
17247 | "DW_FORM_strp", ".debug_str"); | |
17248 | } | |
17249 | ||
17250 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
17251 | ||
17252 | static const char * | |
17253 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17254 | { | |
17255 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17256 | &dwarf2_per_objfile->line_str, | |
17257 | "DW_FORM_line_strp", | |
17258 | ".debug_line_str"); | |
c906108c SS |
17259 | } |
17260 | ||
36586728 TT |
17261 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
17262 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
17263 | the string consists of a single NUL byte, return NULL; otherwise | |
17264 | return a pointer to the string. */ | |
17265 | ||
d521ce57 | 17266 | static const char * |
36586728 TT |
17267 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
17268 | { | |
17269 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
17270 | ||
17271 | if (dwz->str.buffer == NULL) | |
17272 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
17273 | "section [in module %s]"), | |
17274 | bfd_get_filename (dwz->dwz_bfd)); | |
17275 | if (str_offset >= dwz->str.size) | |
17276 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
17277 | ".debug_str section [in module %s]"), | |
17278 | bfd_get_filename (dwz->dwz_bfd)); | |
17279 | gdb_assert (HOST_CHAR_BIT == 8); | |
17280 | if (dwz->str.buffer[str_offset] == '\0') | |
17281 | return NULL; | |
d521ce57 | 17282 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
17283 | } |
17284 | ||
43988095 JK |
17285 | /* Return pointer to string at .debug_str offset as read from BUF. |
17286 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17287 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17288 | ||
d521ce57 TT |
17289 | static const char * |
17290 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
17291 | const struct comp_unit_head *cu_header, |
17292 | unsigned int *bytes_read_ptr) | |
17293 | { | |
17294 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17295 | ||
17296 | return read_indirect_string_at_offset (abfd, str_offset); | |
17297 | } | |
17298 | ||
43988095 JK |
17299 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
17300 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17301 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17302 | ||
17303 | static const char * | |
17304 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
17305 | const struct comp_unit_head *cu_header, | |
17306 | unsigned int *bytes_read_ptr) | |
17307 | { | |
17308 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17309 | ||
17310 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
17311 | } | |
17312 | ||
17313 | ULONGEST | |
d521ce57 | 17314 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 17315 | unsigned int *bytes_read_ptr) |
c906108c | 17316 | { |
12df843f | 17317 | ULONGEST result; |
ce5d95e1 | 17318 | unsigned int num_read; |
870f88f7 | 17319 | int shift; |
c906108c SS |
17320 | unsigned char byte; |
17321 | ||
17322 | result = 0; | |
17323 | shift = 0; | |
17324 | num_read = 0; | |
c906108c SS |
17325 | while (1) |
17326 | { | |
fe1b8b76 | 17327 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17328 | buf++; |
17329 | num_read++; | |
12df843f | 17330 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
17331 | if ((byte & 128) == 0) |
17332 | { | |
17333 | break; | |
17334 | } | |
17335 | shift += 7; | |
17336 | } | |
17337 | *bytes_read_ptr = num_read; | |
17338 | return result; | |
17339 | } | |
17340 | ||
12df843f | 17341 | static LONGEST |
d521ce57 TT |
17342 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
17343 | unsigned int *bytes_read_ptr) | |
c906108c | 17344 | { |
12df843f | 17345 | LONGEST result; |
870f88f7 | 17346 | int shift, num_read; |
c906108c SS |
17347 | unsigned char byte; |
17348 | ||
17349 | result = 0; | |
17350 | shift = 0; | |
c906108c | 17351 | num_read = 0; |
c906108c SS |
17352 | while (1) |
17353 | { | |
fe1b8b76 | 17354 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17355 | buf++; |
17356 | num_read++; | |
12df843f | 17357 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
17358 | shift += 7; |
17359 | if ((byte & 128) == 0) | |
17360 | { | |
17361 | break; | |
17362 | } | |
17363 | } | |
77e0b926 | 17364 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 17365 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
17366 | *bytes_read_ptr = num_read; |
17367 | return result; | |
17368 | } | |
17369 | ||
3019eac3 DE |
17370 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
17371 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
17372 | ADDR_SIZE is the size of addresses from the CU header. */ | |
17373 | ||
17374 | static CORE_ADDR | |
17375 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
17376 | { | |
17377 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17378 | bfd *abfd = objfile->obfd; | |
17379 | const gdb_byte *info_ptr; | |
17380 | ||
17381 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
17382 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
17383 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 17384 | objfile_name (objfile)); |
3019eac3 DE |
17385 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
17386 | error (_("DW_FORM_addr_index pointing outside of " | |
17387 | ".debug_addr section [in module %s]"), | |
4262abfb | 17388 | objfile_name (objfile)); |
3019eac3 DE |
17389 | info_ptr = (dwarf2_per_objfile->addr.buffer |
17390 | + addr_base + addr_index * addr_size); | |
17391 | if (addr_size == 4) | |
17392 | return bfd_get_32 (abfd, info_ptr); | |
17393 | else | |
17394 | return bfd_get_64 (abfd, info_ptr); | |
17395 | } | |
17396 | ||
17397 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
17398 | ||
17399 | static CORE_ADDR | |
17400 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
17401 | { | |
17402 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
17403 | } | |
17404 | ||
17405 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
17406 | ||
17407 | static CORE_ADDR | |
d521ce57 | 17408 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
17409 | unsigned int *bytes_read) |
17410 | { | |
17411 | bfd *abfd = cu->objfile->obfd; | |
17412 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
17413 | ||
17414 | return read_addr_index (cu, addr_index); | |
17415 | } | |
17416 | ||
17417 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
17418 | back to dwarf2_read_addr_index. */ | |
17419 | ||
17420 | struct dwarf2_read_addr_index_data | |
17421 | { | |
17422 | ULONGEST addr_base; | |
17423 | int addr_size; | |
17424 | }; | |
17425 | ||
17426 | /* die_reader_func for dwarf2_read_addr_index. */ | |
17427 | ||
17428 | static void | |
17429 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 17430 | const gdb_byte *info_ptr, |
3019eac3 DE |
17431 | struct die_info *comp_unit_die, |
17432 | int has_children, | |
17433 | void *data) | |
17434 | { | |
17435 | struct dwarf2_cu *cu = reader->cu; | |
17436 | struct dwarf2_read_addr_index_data *aidata = | |
17437 | (struct dwarf2_read_addr_index_data *) data; | |
17438 | ||
17439 | aidata->addr_base = cu->addr_base; | |
17440 | aidata->addr_size = cu->header.addr_size; | |
17441 | } | |
17442 | ||
17443 | /* Given an index in .debug_addr, fetch the value. | |
17444 | NOTE: This can be called during dwarf expression evaluation, | |
17445 | long after the debug information has been read, and thus per_cu->cu | |
17446 | may no longer exist. */ | |
17447 | ||
17448 | CORE_ADDR | |
17449 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
17450 | unsigned int addr_index) | |
17451 | { | |
17452 | struct objfile *objfile = per_cu->objfile; | |
17453 | struct dwarf2_cu *cu = per_cu->cu; | |
17454 | ULONGEST addr_base; | |
17455 | int addr_size; | |
17456 | ||
17457 | /* This is intended to be called from outside this file. */ | |
17458 | dw2_setup (objfile); | |
17459 | ||
17460 | /* We need addr_base and addr_size. | |
17461 | If we don't have PER_CU->cu, we have to get it. | |
17462 | Nasty, but the alternative is storing the needed info in PER_CU, | |
17463 | which at this point doesn't seem justified: it's not clear how frequently | |
17464 | it would get used and it would increase the size of every PER_CU. | |
17465 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
17466 | so we're not in uncharted territory here. | |
17467 | Alas we need to be a bit more complicated as addr_base is contained | |
17468 | in the DIE. | |
17469 | ||
17470 | We don't need to read the entire CU(/TU). | |
17471 | We just need the header and top level die. | |
a1b64ce1 | 17472 | |
3019eac3 | 17473 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 17474 | For now we skip this optimization. */ |
3019eac3 DE |
17475 | |
17476 | if (cu != NULL) | |
17477 | { | |
17478 | addr_base = cu->addr_base; | |
17479 | addr_size = cu->header.addr_size; | |
17480 | } | |
17481 | else | |
17482 | { | |
17483 | struct dwarf2_read_addr_index_data aidata; | |
17484 | ||
a1b64ce1 DE |
17485 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
17486 | we need addr_base. */ | |
17487 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
17488 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
17489 | addr_base = aidata.addr_base; |
17490 | addr_size = aidata.addr_size; | |
17491 | } | |
17492 | ||
17493 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
17494 | } | |
17495 | ||
57d63ce2 DE |
17496 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
17497 | This is only used by the Fission support. */ | |
3019eac3 | 17498 | |
d521ce57 | 17499 | static const char * |
342587c4 | 17500 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
17501 | { |
17502 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 17503 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 17504 | bfd *abfd = objfile->obfd; |
342587c4 | 17505 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
17506 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
17507 | struct dwarf2_section_info *str_offsets_section = | |
17508 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 17509 | const gdb_byte *info_ptr; |
3019eac3 | 17510 | ULONGEST str_offset; |
57d63ce2 | 17511 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 17512 | |
73869dc2 DE |
17513 | dwarf2_read_section (objfile, str_section); |
17514 | dwarf2_read_section (objfile, str_offsets_section); | |
17515 | if (str_section->buffer == NULL) | |
57d63ce2 | 17516 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
17517 | " in CU at offset 0x%x [in module %s]"), |
17518 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17519 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 17520 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
17521 | " in CU at offset 0x%x [in module %s]"), |
17522 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17523 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 17524 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
17525 | " section in CU at offset 0x%x [in module %s]"), |
17526 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17527 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
17528 | + str_index * cu->header.offset_size); |
17529 | if (cu->header.offset_size == 4) | |
17530 | str_offset = bfd_get_32 (abfd, info_ptr); | |
17531 | else | |
17532 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 17533 | if (str_offset >= str_section->size) |
57d63ce2 | 17534 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
17535 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
17536 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17537 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
17538 | } |
17539 | ||
3019eac3 DE |
17540 | /* Return the length of an LEB128 number in BUF. */ |
17541 | ||
17542 | static int | |
17543 | leb128_size (const gdb_byte *buf) | |
17544 | { | |
17545 | const gdb_byte *begin = buf; | |
17546 | gdb_byte byte; | |
17547 | ||
17548 | while (1) | |
17549 | { | |
17550 | byte = *buf++; | |
17551 | if ((byte & 128) == 0) | |
17552 | return buf - begin; | |
17553 | } | |
17554 | } | |
17555 | ||
c906108c | 17556 | static void |
e142c38c | 17557 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
17558 | { |
17559 | switch (lang) | |
17560 | { | |
17561 | case DW_LANG_C89: | |
76bee0cc | 17562 | case DW_LANG_C99: |
0cfd832f | 17563 | case DW_LANG_C11: |
c906108c | 17564 | case DW_LANG_C: |
d1be3247 | 17565 | case DW_LANG_UPC: |
e142c38c | 17566 | cu->language = language_c; |
c906108c | 17567 | break; |
9c37b5ae | 17568 | case DW_LANG_Java: |
c906108c | 17569 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
17570 | case DW_LANG_C_plus_plus_11: |
17571 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 17572 | cu->language = language_cplus; |
c906108c | 17573 | break; |
6aecb9c2 JB |
17574 | case DW_LANG_D: |
17575 | cu->language = language_d; | |
17576 | break; | |
c906108c SS |
17577 | case DW_LANG_Fortran77: |
17578 | case DW_LANG_Fortran90: | |
b21b22e0 | 17579 | case DW_LANG_Fortran95: |
f7de9aab MW |
17580 | case DW_LANG_Fortran03: |
17581 | case DW_LANG_Fortran08: | |
e142c38c | 17582 | cu->language = language_fortran; |
c906108c | 17583 | break; |
a766d390 DE |
17584 | case DW_LANG_Go: |
17585 | cu->language = language_go; | |
17586 | break; | |
c906108c | 17587 | case DW_LANG_Mips_Assembler: |
e142c38c | 17588 | cu->language = language_asm; |
c906108c SS |
17589 | break; |
17590 | case DW_LANG_Ada83: | |
8aaf0b47 | 17591 | case DW_LANG_Ada95: |
bc5f45f8 JB |
17592 | cu->language = language_ada; |
17593 | break; | |
72019c9c GM |
17594 | case DW_LANG_Modula2: |
17595 | cu->language = language_m2; | |
17596 | break; | |
fe8e67fd PM |
17597 | case DW_LANG_Pascal83: |
17598 | cu->language = language_pascal; | |
17599 | break; | |
22566fbd DJ |
17600 | case DW_LANG_ObjC: |
17601 | cu->language = language_objc; | |
17602 | break; | |
c44af4eb TT |
17603 | case DW_LANG_Rust: |
17604 | case DW_LANG_Rust_old: | |
17605 | cu->language = language_rust; | |
17606 | break; | |
c906108c SS |
17607 | case DW_LANG_Cobol74: |
17608 | case DW_LANG_Cobol85: | |
c906108c | 17609 | default: |
e142c38c | 17610 | cu->language = language_minimal; |
c906108c SS |
17611 | break; |
17612 | } | |
e142c38c | 17613 | cu->language_defn = language_def (cu->language); |
c906108c SS |
17614 | } |
17615 | ||
17616 | /* Return the named attribute or NULL if not there. */ | |
17617 | ||
17618 | static struct attribute * | |
e142c38c | 17619 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 17620 | { |
a48e046c | 17621 | for (;;) |
c906108c | 17622 | { |
a48e046c TT |
17623 | unsigned int i; |
17624 | struct attribute *spec = NULL; | |
17625 | ||
17626 | for (i = 0; i < die->num_attrs; ++i) | |
17627 | { | |
17628 | if (die->attrs[i].name == name) | |
17629 | return &die->attrs[i]; | |
17630 | if (die->attrs[i].name == DW_AT_specification | |
17631 | || die->attrs[i].name == DW_AT_abstract_origin) | |
17632 | spec = &die->attrs[i]; | |
17633 | } | |
17634 | ||
17635 | if (!spec) | |
17636 | break; | |
c906108c | 17637 | |
f2f0e013 | 17638 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 17639 | } |
c5aa993b | 17640 | |
c906108c SS |
17641 | return NULL; |
17642 | } | |
17643 | ||
348e048f DE |
17644 | /* Return the named attribute or NULL if not there, |
17645 | but do not follow DW_AT_specification, etc. | |
17646 | This is for use in contexts where we're reading .debug_types dies. | |
17647 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
17648 | back up the chain, and we want to go down. */ | |
17649 | ||
17650 | static struct attribute * | |
45e58e77 | 17651 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
17652 | { |
17653 | unsigned int i; | |
17654 | ||
17655 | for (i = 0; i < die->num_attrs; ++i) | |
17656 | if (die->attrs[i].name == name) | |
17657 | return &die->attrs[i]; | |
17658 | ||
17659 | return NULL; | |
17660 | } | |
17661 | ||
7d45c7c3 KB |
17662 | /* Return the string associated with a string-typed attribute, or NULL if it |
17663 | is either not found or is of an incorrect type. */ | |
17664 | ||
17665 | static const char * | |
17666 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
17667 | { | |
17668 | struct attribute *attr; | |
17669 | const char *str = NULL; | |
17670 | ||
17671 | attr = dwarf2_attr (die, name, cu); | |
17672 | ||
17673 | if (attr != NULL) | |
17674 | { | |
43988095 | 17675 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
17676 | || attr->form == DW_FORM_string |
17677 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 17678 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
17679 | str = DW_STRING (attr); |
17680 | else | |
17681 | complaint (&symfile_complaints, | |
17682 | _("string type expected for attribute %s for " | |
17683 | "DIE at 0x%x in module %s"), | |
9c541725 | 17684 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
17685 | objfile_name (cu->objfile)); |
17686 | } | |
17687 | ||
17688 | return str; | |
17689 | } | |
17690 | ||
05cf31d1 JB |
17691 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
17692 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 17693 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
17694 | |
17695 | static int | |
17696 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
17697 | { | |
17698 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
17699 | ||
17700 | return (attr && DW_UNSND (attr)); | |
17701 | } | |
17702 | ||
3ca72b44 | 17703 | static int |
e142c38c | 17704 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 17705 | { |
05cf31d1 JB |
17706 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
17707 | which value is non-zero. However, we have to be careful with | |
17708 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
17709 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
17710 | end up accidently finding a declaration attribute that belongs | |
17711 | to a different DIE referenced by the specification attribute, | |
17712 | even though the given DIE does not have a declaration attribute. */ | |
17713 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
17714 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
17715 | } |
17716 | ||
63d06c5c | 17717 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 17718 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
17719 | containing the return value on output. If there is no |
17720 | specification, but there is an abstract origin, that is | |
17721 | returned. */ | |
63d06c5c DC |
17722 | |
17723 | static struct die_info * | |
f2f0e013 | 17724 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 17725 | { |
f2f0e013 DJ |
17726 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
17727 | *spec_cu); | |
63d06c5c | 17728 | |
edb3359d DJ |
17729 | if (spec_attr == NULL) |
17730 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
17731 | ||
63d06c5c DC |
17732 | if (spec_attr == NULL) |
17733 | return NULL; | |
17734 | else | |
f2f0e013 | 17735 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 17736 | } |
c906108c | 17737 | |
527f3840 JK |
17738 | /* Stub for free_line_header to match void * callback types. */ |
17739 | ||
17740 | static void | |
17741 | free_line_header_voidp (void *arg) | |
17742 | { | |
9a3c8263 | 17743 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 17744 | |
fff8551c | 17745 | delete lh; |
527f3840 JK |
17746 | } |
17747 | ||
fff8551c PA |
17748 | void |
17749 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 17750 | { |
27e0867f | 17751 | if (dwarf_line_debug >= 2) |
fff8551c PA |
17752 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
17753 | include_dirs.size () + 1, include_dir); | |
27e0867f | 17754 | |
fff8551c | 17755 | include_dirs.push_back (include_dir); |
debd256d | 17756 | } |
6e70227d | 17757 | |
fff8551c PA |
17758 | void |
17759 | line_header::add_file_name (const char *name, | |
ecfb656c | 17760 | dir_index d_index, |
fff8551c PA |
17761 | unsigned int mod_time, |
17762 | unsigned int length) | |
debd256d | 17763 | { |
27e0867f DE |
17764 | if (dwarf_line_debug >= 2) |
17765 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 17766 | (unsigned) file_names.size () + 1, name); |
27e0867f | 17767 | |
ecfb656c | 17768 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 17769 | } |
6e70227d | 17770 | |
83769d0b | 17771 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
17772 | |
17773 | static struct dwarf2_section_info * | |
17774 | get_debug_line_section (struct dwarf2_cu *cu) | |
17775 | { | |
17776 | struct dwarf2_section_info *section; | |
17777 | ||
17778 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
17779 | DWO file. */ | |
17780 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
17781 | section = &cu->dwo_unit->dwo_file->sections.line; | |
17782 | else if (cu->per_cu->is_dwz) | |
17783 | { | |
17784 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17785 | ||
17786 | section = &dwz->line; | |
17787 | } | |
17788 | else | |
17789 | section = &dwarf2_per_objfile->line; | |
17790 | ||
17791 | return section; | |
17792 | } | |
17793 | ||
43988095 JK |
17794 | /* Read directory or file name entry format, starting with byte of |
17795 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
17796 | entries count and the entries themselves in the described entry | |
17797 | format. */ | |
17798 | ||
17799 | static void | |
17800 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
17801 | struct line_header *lh, | |
17802 | const struct comp_unit_head *cu_header, | |
17803 | void (*callback) (struct line_header *lh, | |
17804 | const char *name, | |
ecfb656c | 17805 | dir_index d_index, |
43988095 JK |
17806 | unsigned int mod_time, |
17807 | unsigned int length)) | |
17808 | { | |
17809 | gdb_byte format_count, formati; | |
17810 | ULONGEST data_count, datai; | |
17811 | const gdb_byte *buf = *bufp; | |
17812 | const gdb_byte *format_header_data; | |
17813 | int i; | |
17814 | unsigned int bytes_read; | |
17815 | ||
17816 | format_count = read_1_byte (abfd, buf); | |
17817 | buf += 1; | |
17818 | format_header_data = buf; | |
17819 | for (formati = 0; formati < format_count; formati++) | |
17820 | { | |
17821 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17822 | buf += bytes_read; | |
17823 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17824 | buf += bytes_read; | |
17825 | } | |
17826 | ||
17827 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17828 | buf += bytes_read; | |
17829 | for (datai = 0; datai < data_count; datai++) | |
17830 | { | |
17831 | const gdb_byte *format = format_header_data; | |
17832 | struct file_entry fe; | |
17833 | ||
43988095 JK |
17834 | for (formati = 0; formati < format_count; formati++) |
17835 | { | |
ecfb656c | 17836 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 17837 | format += bytes_read; |
43988095 | 17838 | |
ecfb656c | 17839 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 17840 | format += bytes_read; |
ecfb656c PA |
17841 | |
17842 | gdb::optional<const char *> string; | |
17843 | gdb::optional<unsigned int> uint; | |
17844 | ||
43988095 JK |
17845 | switch (form) |
17846 | { | |
17847 | case DW_FORM_string: | |
ecfb656c | 17848 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
17849 | buf += bytes_read; |
17850 | break; | |
17851 | ||
17852 | case DW_FORM_line_strp: | |
ecfb656c PA |
17853 | string.emplace (read_indirect_line_string (abfd, buf, |
17854 | cu_header, | |
17855 | &bytes_read)); | |
43988095 JK |
17856 | buf += bytes_read; |
17857 | break; | |
17858 | ||
17859 | case DW_FORM_data1: | |
ecfb656c | 17860 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
17861 | buf += 1; |
17862 | break; | |
17863 | ||
17864 | case DW_FORM_data2: | |
ecfb656c | 17865 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
17866 | buf += 2; |
17867 | break; | |
17868 | ||
17869 | case DW_FORM_data4: | |
ecfb656c | 17870 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
17871 | buf += 4; |
17872 | break; | |
17873 | ||
17874 | case DW_FORM_data8: | |
ecfb656c | 17875 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
17876 | buf += 8; |
17877 | break; | |
17878 | ||
17879 | case DW_FORM_udata: | |
ecfb656c | 17880 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
17881 | buf += bytes_read; |
17882 | break; | |
17883 | ||
17884 | case DW_FORM_block: | |
17885 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
17886 | current GDB. */ | |
17887 | break; | |
17888 | } | |
ecfb656c PA |
17889 | |
17890 | switch (content_type) | |
17891 | { | |
17892 | case DW_LNCT_path: | |
17893 | if (string.has_value ()) | |
17894 | fe.name = *string; | |
17895 | break; | |
17896 | case DW_LNCT_directory_index: | |
17897 | if (uint.has_value ()) | |
17898 | fe.d_index = (dir_index) *uint; | |
17899 | break; | |
17900 | case DW_LNCT_timestamp: | |
17901 | if (uint.has_value ()) | |
17902 | fe.mod_time = *uint; | |
17903 | break; | |
17904 | case DW_LNCT_size: | |
17905 | if (uint.has_value ()) | |
17906 | fe.length = *uint; | |
17907 | break; | |
17908 | case DW_LNCT_MD5: | |
17909 | break; | |
17910 | default: | |
17911 | complaint (&symfile_complaints, | |
17912 | _("Unknown format content type %s"), | |
17913 | pulongest (content_type)); | |
17914 | } | |
43988095 JK |
17915 | } |
17916 | ||
ecfb656c | 17917 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
17918 | } |
17919 | ||
17920 | *bufp = buf; | |
17921 | } | |
17922 | ||
debd256d | 17923 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 17924 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 17925 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
17926 | Returns NULL if there is a problem reading the header, e.g., if it |
17927 | has a version we don't understand. | |
debd256d JB |
17928 | |
17929 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
17930 | the returned object point into the dwarf line section buffer, |
17931 | and must not be freed. */ | |
ae2de4f8 | 17932 | |
fff8551c | 17933 | static line_header_up |
9c541725 | 17934 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 17935 | { |
d521ce57 | 17936 | const gdb_byte *line_ptr; |
c764a876 | 17937 | unsigned int bytes_read, offset_size; |
debd256d | 17938 | int i; |
d521ce57 | 17939 | const char *cur_dir, *cur_file; |
3019eac3 DE |
17940 | struct dwarf2_section_info *section; |
17941 | bfd *abfd; | |
17942 | ||
36586728 | 17943 | section = get_debug_line_section (cu); |
3019eac3 DE |
17944 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
17945 | if (section->buffer == NULL) | |
debd256d | 17946 | { |
3019eac3 DE |
17947 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
17948 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
17949 | else | |
17950 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
17951 | return 0; |
17952 | } | |
17953 | ||
fceca515 DE |
17954 | /* We can't do this until we know the section is non-empty. |
17955 | Only then do we know we have such a section. */ | |
a32a8923 | 17956 | abfd = get_section_bfd_owner (section); |
fceca515 | 17957 | |
a738430d MK |
17958 | /* Make sure that at least there's room for the total_length field. |
17959 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 17960 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 17961 | { |
4d3c2250 | 17962 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
17963 | return 0; |
17964 | } | |
17965 | ||
fff8551c | 17966 | line_header_up lh (new line_header ()); |
debd256d | 17967 | |
9c541725 | 17968 | lh->sect_off = sect_off; |
527f3840 JK |
17969 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
17970 | ||
9c541725 | 17971 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 17972 | |
a738430d | 17973 | /* Read in the header. */ |
6e70227d | 17974 | lh->total_length = |
c764a876 DE |
17975 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
17976 | &bytes_read, &offset_size); | |
debd256d | 17977 | line_ptr += bytes_read; |
3019eac3 | 17978 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 17979 | { |
4d3c2250 | 17980 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
17981 | return 0; |
17982 | } | |
17983 | lh->statement_program_end = line_ptr + lh->total_length; | |
17984 | lh->version = read_2_bytes (abfd, line_ptr); | |
17985 | line_ptr += 2; | |
43988095 | 17986 | if (lh->version > 5) |
cd366ee8 DE |
17987 | { |
17988 | /* This is a version we don't understand. The format could have | |
17989 | changed in ways we don't handle properly so just punt. */ | |
17990 | complaint (&symfile_complaints, | |
17991 | _("unsupported version in .debug_line section")); | |
17992 | return NULL; | |
17993 | } | |
43988095 JK |
17994 | if (lh->version >= 5) |
17995 | { | |
17996 | gdb_byte segment_selector_size; | |
17997 | ||
17998 | /* Skip address size. */ | |
17999 | read_1_byte (abfd, line_ptr); | |
18000 | line_ptr += 1; | |
18001 | ||
18002 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18003 | line_ptr += 1; | |
18004 | if (segment_selector_size != 0) | |
18005 | { | |
18006 | complaint (&symfile_complaints, | |
18007 | _("unsupported segment selector size %u " | |
18008 | "in .debug_line section"), | |
18009 | segment_selector_size); | |
18010 | return NULL; | |
18011 | } | |
18012 | } | |
c764a876 DE |
18013 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18014 | line_ptr += offset_size; | |
debd256d JB |
18015 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18016 | line_ptr += 1; | |
2dc7f7b3 TT |
18017 | if (lh->version >= 4) |
18018 | { | |
18019 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18020 | line_ptr += 1; | |
18021 | } | |
18022 | else | |
18023 | lh->maximum_ops_per_instruction = 1; | |
18024 | ||
18025 | if (lh->maximum_ops_per_instruction == 0) | |
18026 | { | |
18027 | lh->maximum_ops_per_instruction = 1; | |
18028 | complaint (&symfile_complaints, | |
3e43a32a MS |
18029 | _("invalid maximum_ops_per_instruction " |
18030 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18031 | } |
18032 | ||
debd256d JB |
18033 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18034 | line_ptr += 1; | |
18035 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18036 | line_ptr += 1; | |
18037 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18038 | line_ptr += 1; | |
18039 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18040 | line_ptr += 1; | |
fff8551c | 18041 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18042 | |
18043 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18044 | for (i = 1; i < lh->opcode_base; ++i) | |
18045 | { | |
18046 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18047 | line_ptr += 1; | |
18048 | } | |
18049 | ||
43988095 | 18050 | if (lh->version >= 5) |
debd256d | 18051 | { |
43988095 | 18052 | /* Read directory table. */ |
fff8551c PA |
18053 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18054 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18055 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18056 | unsigned int length) |
18057 | { | |
18058 | lh->add_include_dir (name); | |
18059 | }); | |
debd256d | 18060 | |
43988095 | 18061 | /* Read file name table. */ |
fff8551c PA |
18062 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18063 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18064 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18065 | unsigned int length) |
18066 | { | |
ecfb656c | 18067 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18068 | }); |
43988095 JK |
18069 | } |
18070 | else | |
debd256d | 18071 | { |
43988095 JK |
18072 | /* Read directory table. */ |
18073 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18074 | { | |
18075 | line_ptr += bytes_read; | |
fff8551c | 18076 | lh->add_include_dir (cur_dir); |
43988095 | 18077 | } |
debd256d JB |
18078 | line_ptr += bytes_read; |
18079 | ||
43988095 JK |
18080 | /* Read file name table. */ |
18081 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18082 | { | |
ecfb656c PA |
18083 | unsigned int mod_time, length; |
18084 | dir_index d_index; | |
43988095 JK |
18085 | |
18086 | line_ptr += bytes_read; | |
ecfb656c | 18087 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
18088 | line_ptr += bytes_read; |
18089 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18090 | line_ptr += bytes_read; | |
18091 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18092 | line_ptr += bytes_read; | |
18093 | ||
ecfb656c | 18094 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
18095 | } |
18096 | line_ptr += bytes_read; | |
debd256d | 18097 | } |
6e70227d | 18098 | lh->statement_program_start = line_ptr; |
debd256d | 18099 | |
3019eac3 | 18100 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 18101 | complaint (&symfile_complaints, |
3e43a32a MS |
18102 | _("line number info header doesn't " |
18103 | "fit in `.debug_line' section")); | |
debd256d | 18104 | |
debd256d JB |
18105 | return lh; |
18106 | } | |
c906108c | 18107 | |
c6da4cef DE |
18108 | /* Subroutine of dwarf_decode_lines to simplify it. |
18109 | Return the file name of the psymtab for included file FILE_INDEX | |
18110 | in line header LH of PST. | |
18111 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18112 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
18113 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
18114 | ||
18115 | The function creates dangling cleanup registration. */ | |
c6da4cef | 18116 | |
d521ce57 | 18117 | static const char * |
c6da4cef DE |
18118 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
18119 | const struct partial_symtab *pst, | |
18120 | const char *comp_dir) | |
18121 | { | |
8c43009f | 18122 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
18123 | const char *include_name = fe.name; |
18124 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
18125 | const char *pst_filename; |
18126 | char *copied_name = NULL; | |
c6da4cef DE |
18127 | int file_is_pst; |
18128 | ||
8c43009f | 18129 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
18130 | |
18131 | if (!IS_ABSOLUTE_PATH (include_name) | |
18132 | && (dir_name != NULL || comp_dir != NULL)) | |
18133 | { | |
18134 | /* Avoid creating a duplicate psymtab for PST. | |
18135 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
18136 | Before we do the comparison, however, we need to account | |
18137 | for DIR_NAME and COMP_DIR. | |
18138 | First prepend dir_name (if non-NULL). If we still don't | |
18139 | have an absolute path prepend comp_dir (if non-NULL). | |
18140 | However, the directory we record in the include-file's | |
18141 | psymtab does not contain COMP_DIR (to match the | |
18142 | corresponding symtab(s)). | |
18143 | ||
18144 | Example: | |
18145 | ||
18146 | bash$ cd /tmp | |
18147 | bash$ gcc -g ./hello.c | |
18148 | include_name = "hello.c" | |
18149 | dir_name = "." | |
18150 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
18151 | DW_AT_name = "./hello.c" |
18152 | ||
18153 | */ | |
c6da4cef DE |
18154 | |
18155 | if (dir_name != NULL) | |
18156 | { | |
d521ce57 TT |
18157 | char *tem = concat (dir_name, SLASH_STRING, |
18158 | include_name, (char *)NULL); | |
18159 | ||
18160 | make_cleanup (xfree, tem); | |
18161 | include_name = tem; | |
c6da4cef | 18162 | include_name_to_compare = include_name; |
c6da4cef DE |
18163 | } |
18164 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
18165 | { | |
d521ce57 TT |
18166 | char *tem = concat (comp_dir, SLASH_STRING, |
18167 | include_name, (char *)NULL); | |
18168 | ||
18169 | make_cleanup (xfree, tem); | |
18170 | include_name_to_compare = tem; | |
c6da4cef DE |
18171 | } |
18172 | } | |
18173 | ||
18174 | pst_filename = pst->filename; | |
18175 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
18176 | { | |
72b9f47f TT |
18177 | copied_name = concat (pst->dirname, SLASH_STRING, |
18178 | pst_filename, (char *)NULL); | |
18179 | pst_filename = copied_name; | |
c6da4cef DE |
18180 | } |
18181 | ||
1e3fad37 | 18182 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 18183 | |
72b9f47f TT |
18184 | if (copied_name != NULL) |
18185 | xfree (copied_name); | |
c6da4cef DE |
18186 | |
18187 | if (file_is_pst) | |
18188 | return NULL; | |
18189 | return include_name; | |
18190 | } | |
18191 | ||
d9b3de22 DE |
18192 | /* State machine to track the state of the line number program. */ |
18193 | ||
6f77053d | 18194 | class lnp_state_machine |
d9b3de22 | 18195 | { |
6f77053d PA |
18196 | public: |
18197 | /* Initialize a machine state for the start of a line number | |
18198 | program. */ | |
18199 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
18200 | ||
8c43009f PA |
18201 | file_entry *current_file () |
18202 | { | |
18203 | /* lh->file_names is 0-based, but the file name numbers in the | |
18204 | statement program are 1-based. */ | |
6f77053d PA |
18205 | return m_line_header->file_name_at (m_file); |
18206 | } | |
18207 | ||
18208 | /* Record the line in the state machine. END_SEQUENCE is true if | |
18209 | we're processing the end of a sequence. */ | |
18210 | void record_line (bool end_sequence); | |
18211 | ||
18212 | /* Check address and if invalid nop-out the rest of the lines in this | |
18213 | sequence. */ | |
18214 | void check_line_address (struct dwarf2_cu *cu, | |
18215 | const gdb_byte *line_ptr, | |
18216 | CORE_ADDR lowpc, CORE_ADDR address); | |
18217 | ||
18218 | void handle_set_discriminator (unsigned int discriminator) | |
18219 | { | |
18220 | m_discriminator = discriminator; | |
18221 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
18222 | } | |
18223 | ||
18224 | /* Handle DW_LNE_set_address. */ | |
18225 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
18226 | { | |
18227 | m_op_index = 0; | |
18228 | address += baseaddr; | |
18229 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
18230 | } | |
18231 | ||
18232 | /* Handle DW_LNS_advance_pc. */ | |
18233 | void handle_advance_pc (CORE_ADDR adjust); | |
18234 | ||
18235 | /* Handle a special opcode. */ | |
18236 | void handle_special_opcode (unsigned char op_code); | |
18237 | ||
18238 | /* Handle DW_LNS_advance_line. */ | |
18239 | void handle_advance_line (int line_delta) | |
18240 | { | |
18241 | advance_line (line_delta); | |
18242 | } | |
18243 | ||
18244 | /* Handle DW_LNS_set_file. */ | |
18245 | void handle_set_file (file_name_index file); | |
18246 | ||
18247 | /* Handle DW_LNS_negate_stmt. */ | |
18248 | void handle_negate_stmt () | |
18249 | { | |
18250 | m_is_stmt = !m_is_stmt; | |
18251 | } | |
18252 | ||
18253 | /* Handle DW_LNS_const_add_pc. */ | |
18254 | void handle_const_add_pc (); | |
18255 | ||
18256 | /* Handle DW_LNS_fixed_advance_pc. */ | |
18257 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
18258 | { | |
18259 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18260 | m_op_index = 0; | |
18261 | } | |
18262 | ||
18263 | /* Handle DW_LNS_copy. */ | |
18264 | void handle_copy () | |
18265 | { | |
18266 | record_line (false); | |
18267 | m_discriminator = 0; | |
18268 | } | |
18269 | ||
18270 | /* Handle DW_LNE_end_sequence. */ | |
18271 | void handle_end_sequence () | |
18272 | { | |
18273 | m_record_line_callback = ::record_line; | |
18274 | } | |
18275 | ||
18276 | private: | |
18277 | /* Advance the line by LINE_DELTA. */ | |
18278 | void advance_line (int line_delta) | |
18279 | { | |
18280 | m_line += line_delta; | |
18281 | ||
18282 | if (line_delta != 0) | |
18283 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
18284 | } |
18285 | ||
6f77053d PA |
18286 | gdbarch *m_gdbarch; |
18287 | ||
18288 | /* True if we're recording lines. | |
18289 | Otherwise we're building partial symtabs and are just interested in | |
18290 | finding include files mentioned by the line number program. */ | |
18291 | bool m_record_lines_p; | |
18292 | ||
8c43009f | 18293 | /* The line number header. */ |
6f77053d | 18294 | line_header *m_line_header; |
8c43009f | 18295 | |
6f77053d PA |
18296 | /* These are part of the standard DWARF line number state machine, |
18297 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 18298 | |
6f77053d | 18299 | unsigned char m_op_index = 0; |
8c43009f | 18300 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
18301 | file_name_index m_file = (file_name_index) 1; |
18302 | unsigned int m_line = 1; | |
18303 | ||
18304 | /* These are initialized in the constructor. */ | |
18305 | ||
18306 | CORE_ADDR m_address; | |
18307 | bool m_is_stmt; | |
18308 | unsigned int m_discriminator; | |
d9b3de22 DE |
18309 | |
18310 | /* Additional bits of state we need to track. */ | |
18311 | ||
18312 | /* The last file that we called dwarf2_start_subfile for. | |
18313 | This is only used for TLLs. */ | |
6f77053d | 18314 | unsigned int m_last_file = 0; |
d9b3de22 | 18315 | /* The last file a line number was recorded for. */ |
6f77053d | 18316 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
18317 | |
18318 | /* The function to call to record a line. */ | |
6f77053d | 18319 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
18320 | |
18321 | /* The last line number that was recorded, used to coalesce | |
18322 | consecutive entries for the same line. This can happen, for | |
18323 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
18324 | unsigned int m_last_line = 0; |
18325 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 18326 | }; |
d9b3de22 | 18327 | |
6f77053d PA |
18328 | void |
18329 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
18330 | { | |
18331 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
18332 | / m_line_header->maximum_ops_per_instruction) | |
18333 | * m_line_header->minimum_instruction_length); | |
18334 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18335 | m_op_index = ((m_op_index + adjust) | |
18336 | % m_line_header->maximum_ops_per_instruction); | |
18337 | } | |
d9b3de22 | 18338 | |
6f77053d PA |
18339 | void |
18340 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 18341 | { |
6f77053d PA |
18342 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
18343 | CORE_ADDR addr_adj = (((m_op_index | |
18344 | + (adj_opcode / m_line_header->line_range)) | |
18345 | / m_line_header->maximum_ops_per_instruction) | |
18346 | * m_line_header->minimum_instruction_length); | |
18347 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18348 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
18349 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 18350 | |
6f77053d PA |
18351 | int line_delta = (m_line_header->line_base |
18352 | + (adj_opcode % m_line_header->line_range)); | |
18353 | advance_line (line_delta); | |
18354 | record_line (false); | |
18355 | m_discriminator = 0; | |
18356 | } | |
d9b3de22 | 18357 | |
6f77053d PA |
18358 | void |
18359 | lnp_state_machine::handle_set_file (file_name_index file) | |
18360 | { | |
18361 | m_file = file; | |
18362 | ||
18363 | const file_entry *fe = current_file (); | |
18364 | if (fe == NULL) | |
18365 | dwarf2_debug_line_missing_file_complaint (); | |
18366 | else if (m_record_lines_p) | |
18367 | { | |
18368 | const char *dir = fe->include_dir (m_line_header); | |
18369 | ||
18370 | m_last_subfile = current_subfile; | |
18371 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
18372 | dwarf2_start_subfile (fe->name, dir); | |
18373 | } | |
18374 | } | |
18375 | ||
18376 | void | |
18377 | lnp_state_machine::handle_const_add_pc () | |
18378 | { | |
18379 | CORE_ADDR adjust | |
18380 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
18381 | ||
18382 | CORE_ADDR addr_adj | |
18383 | = (((m_op_index + adjust) | |
18384 | / m_line_header->maximum_ops_per_instruction) | |
18385 | * m_line_header->minimum_instruction_length); | |
18386 | ||
18387 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18388 | m_op_index = ((m_op_index + adjust) | |
18389 | % m_line_header->maximum_ops_per_instruction); | |
18390 | } | |
d9b3de22 | 18391 | |
c91513d8 PP |
18392 | /* Ignore this record_line request. */ |
18393 | ||
18394 | static void | |
18395 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
18396 | { | |
18397 | return; | |
18398 | } | |
18399 | ||
a05a36a5 DE |
18400 | /* Return non-zero if we should add LINE to the line number table. |
18401 | LINE is the line to add, LAST_LINE is the last line that was added, | |
18402 | LAST_SUBFILE is the subfile for LAST_LINE. | |
18403 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
18404 | had a non-zero discriminator. | |
18405 | ||
18406 | We have to be careful in the presence of discriminators. | |
18407 | E.g., for this line: | |
18408 | ||
18409 | for (i = 0; i < 100000; i++); | |
18410 | ||
18411 | clang can emit four line number entries for that one line, | |
18412 | each with a different discriminator. | |
18413 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
18414 | ||
18415 | However, we want gdb to coalesce all four entries into one. | |
18416 | Otherwise the user could stepi into the middle of the line and | |
18417 | gdb would get confused about whether the pc really was in the | |
18418 | middle of the line. | |
18419 | ||
18420 | Things are further complicated by the fact that two consecutive | |
18421 | line number entries for the same line is a heuristic used by gcc | |
18422 | to denote the end of the prologue. So we can't just discard duplicate | |
18423 | entries, we have to be selective about it. The heuristic we use is | |
18424 | that we only collapse consecutive entries for the same line if at least | |
18425 | one of those entries has a non-zero discriminator. PR 17276. | |
18426 | ||
18427 | Note: Addresses in the line number state machine can never go backwards | |
18428 | within one sequence, thus this coalescing is ok. */ | |
18429 | ||
18430 | static int | |
18431 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
18432 | int line_has_non_zero_discriminator, | |
18433 | struct subfile *last_subfile) | |
18434 | { | |
18435 | if (current_subfile != last_subfile) | |
18436 | return 1; | |
18437 | if (line != last_line) | |
18438 | return 1; | |
18439 | /* Same line for the same file that we've seen already. | |
18440 | As a last check, for pr 17276, only record the line if the line | |
18441 | has never had a non-zero discriminator. */ | |
18442 | if (!line_has_non_zero_discriminator) | |
18443 | return 1; | |
18444 | return 0; | |
18445 | } | |
18446 | ||
252a6764 DE |
18447 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
18448 | in the line table of subfile SUBFILE. */ | |
18449 | ||
18450 | static void | |
d9b3de22 DE |
18451 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
18452 | unsigned int line, CORE_ADDR address, | |
18453 | record_line_ftype p_record_line) | |
252a6764 DE |
18454 | { |
18455 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
18456 | ||
27e0867f DE |
18457 | if (dwarf_line_debug) |
18458 | { | |
18459 | fprintf_unfiltered (gdb_stdlog, | |
18460 | "Recording line %u, file %s, address %s\n", | |
18461 | line, lbasename (subfile->name), | |
18462 | paddress (gdbarch, address)); | |
18463 | } | |
18464 | ||
d5962de5 | 18465 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
18466 | } |
18467 | ||
18468 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
18469 | Mark the end of a set of line number records. | |
d9b3de22 | 18470 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
18471 | If SUBFILE is NULL the request is ignored. */ |
18472 | ||
18473 | static void | |
18474 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
18475 | CORE_ADDR address, record_line_ftype p_record_line) | |
18476 | { | |
27e0867f DE |
18477 | if (subfile == NULL) |
18478 | return; | |
18479 | ||
18480 | if (dwarf_line_debug) | |
18481 | { | |
18482 | fprintf_unfiltered (gdb_stdlog, | |
18483 | "Finishing current line, file %s, address %s\n", | |
18484 | lbasename (subfile->name), | |
18485 | paddress (gdbarch, address)); | |
18486 | } | |
18487 | ||
d9b3de22 DE |
18488 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
18489 | } | |
18490 | ||
6f77053d PA |
18491 | void |
18492 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 18493 | { |
d9b3de22 DE |
18494 | if (dwarf_line_debug) |
18495 | { | |
18496 | fprintf_unfiltered (gdb_stdlog, | |
18497 | "Processing actual line %u: file %u," | |
18498 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
18499 | m_line, to_underlying (m_file), |
18500 | paddress (m_gdbarch, m_address), | |
18501 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
18502 | } |
18503 | ||
6f77053d | 18504 | file_entry *fe = current_file (); |
8c43009f PA |
18505 | |
18506 | if (fe == NULL) | |
d9b3de22 DE |
18507 | dwarf2_debug_line_missing_file_complaint (); |
18508 | /* For now we ignore lines not starting on an instruction boundary. | |
18509 | But not when processing end_sequence for compatibility with the | |
18510 | previous version of the code. */ | |
6f77053d | 18511 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 18512 | { |
8c43009f | 18513 | fe->included_p = 1; |
6f77053d | 18514 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 18515 | { |
6f77053d | 18516 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 18517 | { |
6f77053d PA |
18518 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
18519 | m_address, m_record_line_callback); | |
d9b3de22 DE |
18520 | } |
18521 | ||
18522 | if (!end_sequence) | |
18523 | { | |
6f77053d PA |
18524 | if (dwarf_record_line_p (m_line, m_last_line, |
18525 | m_line_has_non_zero_discriminator, | |
18526 | m_last_subfile)) | |
d9b3de22 | 18527 | { |
6f77053d PA |
18528 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
18529 | m_line, m_address, | |
18530 | m_record_line_callback); | |
d9b3de22 | 18531 | } |
6f77053d PA |
18532 | m_last_subfile = current_subfile; |
18533 | m_last_line = m_line; | |
d9b3de22 DE |
18534 | } |
18535 | } | |
18536 | } | |
18537 | } | |
18538 | ||
6f77053d PA |
18539 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
18540 | bool record_lines_p) | |
d9b3de22 | 18541 | { |
6f77053d PA |
18542 | m_gdbarch = arch; |
18543 | m_record_lines_p = record_lines_p; | |
18544 | m_line_header = lh; | |
d9b3de22 | 18545 | |
6f77053d | 18546 | m_record_line_callback = ::record_line; |
d9b3de22 | 18547 | |
d9b3de22 DE |
18548 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
18549 | was a line entry for it so that the backend has a chance to adjust it | |
18550 | and also record it in case it needs it. This is currently used by MIPS | |
18551 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
18552 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
18553 | m_is_stmt = lh->default_is_stmt; | |
18554 | m_discriminator = 0; | |
252a6764 DE |
18555 | } |
18556 | ||
6f77053d PA |
18557 | void |
18558 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
18559 | const gdb_byte *line_ptr, | |
18560 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
18561 | { |
18562 | /* If address < lowpc then it's not a usable value, it's outside the | |
18563 | pc range of the CU. However, we restrict the test to only address | |
18564 | values of zero to preserve GDB's previous behaviour which is to | |
18565 | handle the specific case of a function being GC'd by the linker. */ | |
18566 | ||
18567 | if (address == 0 && address < lowpc) | |
18568 | { | |
18569 | /* This line table is for a function which has been | |
18570 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
18571 | ||
18572 | struct objfile *objfile = cu->objfile; | |
18573 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
18574 | ||
18575 | complaint (&symfile_complaints, | |
18576 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
18577 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
18578 | m_record_line_callback = noop_record_line; |
18579 | /* Note: record_line_callback is left as noop_record_line until | |
18580 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
18581 | } |
18582 | } | |
18583 | ||
f3f5162e | 18584 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
18585 | Process the line number information in LH. |
18586 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
18587 | program in order to set included_p for every referenced header. */ | |
debd256d | 18588 | |
c906108c | 18589 | static void |
43f3e411 DE |
18590 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
18591 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 18592 | { |
d521ce57 TT |
18593 | const gdb_byte *line_ptr, *extended_end; |
18594 | const gdb_byte *line_end; | |
a8c50c1f | 18595 | unsigned int bytes_read, extended_len; |
699ca60a | 18596 | unsigned char op_code, extended_op; |
e142c38c DJ |
18597 | CORE_ADDR baseaddr; |
18598 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 18599 | bfd *abfd = objfile->obfd; |
fbf65064 | 18600 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
18601 | /* True if we're recording line info (as opposed to building partial |
18602 | symtabs and just interested in finding include files mentioned by | |
18603 | the line number program). */ | |
18604 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
18605 | |
18606 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 18607 | |
debd256d JB |
18608 | line_ptr = lh->statement_program_start; |
18609 | line_end = lh->statement_program_end; | |
c906108c SS |
18610 | |
18611 | /* Read the statement sequences until there's nothing left. */ | |
18612 | while (line_ptr < line_end) | |
18613 | { | |
6f77053d PA |
18614 | /* The DWARF line number program state machine. Reset the state |
18615 | machine at the start of each sequence. */ | |
18616 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
18617 | bool end_sequence = false; | |
d9b3de22 | 18618 | |
8c43009f | 18619 | if (record_lines_p) |
c906108c | 18620 | { |
8c43009f PA |
18621 | /* Start a subfile for the current file of the state |
18622 | machine. */ | |
18623 | const file_entry *fe = state_machine.current_file (); | |
18624 | ||
18625 | if (fe != NULL) | |
18626 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
18627 | } |
18628 | ||
a738430d | 18629 | /* Decode the table. */ |
d9b3de22 | 18630 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
18631 | { |
18632 | op_code = read_1_byte (abfd, line_ptr); | |
18633 | line_ptr += 1; | |
9aa1fe7e | 18634 | |
debd256d | 18635 | if (op_code >= lh->opcode_base) |
6e70227d | 18636 | { |
8e07a239 | 18637 | /* Special opcode. */ |
6f77053d | 18638 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
18639 | } |
18640 | else switch (op_code) | |
c906108c SS |
18641 | { |
18642 | case DW_LNS_extended_op: | |
3e43a32a MS |
18643 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
18644 | &bytes_read); | |
473b7be6 | 18645 | line_ptr += bytes_read; |
a8c50c1f | 18646 | extended_end = line_ptr + extended_len; |
c906108c SS |
18647 | extended_op = read_1_byte (abfd, line_ptr); |
18648 | line_ptr += 1; | |
18649 | switch (extended_op) | |
18650 | { | |
18651 | case DW_LNE_end_sequence: | |
6f77053d PA |
18652 | state_machine.handle_end_sequence (); |
18653 | end_sequence = true; | |
c906108c SS |
18654 | break; |
18655 | case DW_LNE_set_address: | |
d9b3de22 DE |
18656 | { |
18657 | CORE_ADDR address | |
18658 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 18659 | line_ptr += bytes_read; |
6f77053d PA |
18660 | |
18661 | state_machine.check_line_address (cu, line_ptr, | |
18662 | lowpc, address); | |
18663 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 18664 | } |
c906108c SS |
18665 | break; |
18666 | case DW_LNE_define_file: | |
debd256d | 18667 | { |
d521ce57 | 18668 | const char *cur_file; |
ecfb656c PA |
18669 | unsigned int mod_time, length; |
18670 | dir_index dindex; | |
6e70227d | 18671 | |
3e43a32a MS |
18672 | cur_file = read_direct_string (abfd, line_ptr, |
18673 | &bytes_read); | |
debd256d | 18674 | line_ptr += bytes_read; |
ecfb656c | 18675 | dindex = (dir_index) |
debd256d JB |
18676 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
18677 | line_ptr += bytes_read; | |
18678 | mod_time = | |
18679 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18680 | line_ptr += bytes_read; | |
18681 | length = | |
18682 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18683 | line_ptr += bytes_read; | |
ecfb656c | 18684 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 18685 | } |
c906108c | 18686 | break; |
d0c6ba3d | 18687 | case DW_LNE_set_discriminator: |
6f77053d PA |
18688 | { |
18689 | /* The discriminator is not interesting to the | |
18690 | debugger; just ignore it. We still need to | |
18691 | check its value though: | |
18692 | if there are consecutive entries for the same | |
18693 | (non-prologue) line we want to coalesce them. | |
18694 | PR 17276. */ | |
18695 | unsigned int discr | |
18696 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18697 | line_ptr += bytes_read; | |
18698 | ||
18699 | state_machine.handle_set_discriminator (discr); | |
18700 | } | |
d0c6ba3d | 18701 | break; |
c906108c | 18702 | default: |
4d3c2250 | 18703 | complaint (&symfile_complaints, |
e2e0b3e5 | 18704 | _("mangled .debug_line section")); |
debd256d | 18705 | return; |
c906108c | 18706 | } |
a8c50c1f DJ |
18707 | /* Make sure that we parsed the extended op correctly. If e.g. |
18708 | we expected a different address size than the producer used, | |
18709 | we may have read the wrong number of bytes. */ | |
18710 | if (line_ptr != extended_end) | |
18711 | { | |
18712 | complaint (&symfile_complaints, | |
18713 | _("mangled .debug_line section")); | |
18714 | return; | |
18715 | } | |
c906108c SS |
18716 | break; |
18717 | case DW_LNS_copy: | |
6f77053d | 18718 | state_machine.handle_copy (); |
c906108c SS |
18719 | break; |
18720 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
18721 | { |
18722 | CORE_ADDR adjust | |
18723 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 18724 | line_ptr += bytes_read; |
6f77053d PA |
18725 | |
18726 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 18727 | } |
c906108c SS |
18728 | break; |
18729 | case DW_LNS_advance_line: | |
a05a36a5 DE |
18730 | { |
18731 | int line_delta | |
18732 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 18733 | line_ptr += bytes_read; |
6f77053d PA |
18734 | |
18735 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 18736 | } |
c906108c SS |
18737 | break; |
18738 | case DW_LNS_set_file: | |
d9b3de22 | 18739 | { |
6f77053d | 18740 | file_name_index file |
ecfb656c PA |
18741 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
18742 | &bytes_read); | |
d9b3de22 | 18743 | line_ptr += bytes_read; |
8c43009f | 18744 | |
6f77053d | 18745 | state_machine.handle_set_file (file); |
d9b3de22 | 18746 | } |
c906108c SS |
18747 | break; |
18748 | case DW_LNS_set_column: | |
0ad93d4f | 18749 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
18750 | line_ptr += bytes_read; |
18751 | break; | |
18752 | case DW_LNS_negate_stmt: | |
6f77053d | 18753 | state_machine.handle_negate_stmt (); |
c906108c SS |
18754 | break; |
18755 | case DW_LNS_set_basic_block: | |
c906108c | 18756 | break; |
c2c6d25f JM |
18757 | /* Add to the address register of the state machine the |
18758 | address increment value corresponding to special opcode | |
a738430d MK |
18759 | 255. I.e., this value is scaled by the minimum |
18760 | instruction length since special opcode 255 would have | |
b021a221 | 18761 | scaled the increment. */ |
c906108c | 18762 | case DW_LNS_const_add_pc: |
6f77053d | 18763 | state_machine.handle_const_add_pc (); |
c906108c SS |
18764 | break; |
18765 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 18766 | { |
6f77053d | 18767 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 18768 | line_ptr += 2; |
6f77053d PA |
18769 | |
18770 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 18771 | } |
c906108c | 18772 | break; |
9aa1fe7e | 18773 | default: |
a738430d MK |
18774 | { |
18775 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 18776 | int i; |
a738430d | 18777 | |
debd256d | 18778 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
18779 | { |
18780 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18781 | line_ptr += bytes_read; | |
18782 | } | |
18783 | } | |
c906108c SS |
18784 | } |
18785 | } | |
d9b3de22 DE |
18786 | |
18787 | if (!end_sequence) | |
18788 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
18789 | ||
18790 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
18791 | in which case we still finish recording the last line). */ | |
6f77053d | 18792 | state_machine.record_line (true); |
c906108c | 18793 | } |
f3f5162e DE |
18794 | } |
18795 | ||
18796 | /* Decode the Line Number Program (LNP) for the given line_header | |
18797 | structure and CU. The actual information extracted and the type | |
18798 | of structures created from the LNP depends on the value of PST. | |
18799 | ||
18800 | 1. If PST is NULL, then this procedure uses the data from the program | |
18801 | to create all necessary symbol tables, and their linetables. | |
18802 | ||
18803 | 2. If PST is not NULL, this procedure reads the program to determine | |
18804 | the list of files included by the unit represented by PST, and | |
18805 | builds all the associated partial symbol tables. | |
18806 | ||
18807 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18808 | It is used for relative paths in the line table. | |
18809 | NOTE: When processing partial symtabs (pst != NULL), | |
18810 | comp_dir == pst->dirname. | |
18811 | ||
18812 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
18813 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
18814 | symtab we don't use it in the name of the psymtabs we create. | |
18815 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
18816 | A good testcase for this is mb-inline.exp. |
18817 | ||
527f3840 JK |
18818 | LOWPC is the lowest address in CU (or 0 if not known). |
18819 | ||
18820 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
18821 | for its PC<->lines mapping information. Otherwise only the filename | |
18822 | table is read in. */ | |
f3f5162e DE |
18823 | |
18824 | static void | |
18825 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 18826 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 18827 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
18828 | { |
18829 | struct objfile *objfile = cu->objfile; | |
18830 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 18831 | |
527f3840 JK |
18832 | if (decode_mapping) |
18833 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
18834 | |
18835 | if (decode_for_pst_p) | |
18836 | { | |
18837 | int file_index; | |
18838 | ||
18839 | /* Now that we're done scanning the Line Header Program, we can | |
18840 | create the psymtab of each included file. */ | |
fff8551c | 18841 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
18842 | if (lh->file_names[file_index].included_p == 1) |
18843 | { | |
d521ce57 | 18844 | const char *include_name = |
c6da4cef DE |
18845 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
18846 | if (include_name != NULL) | |
aaa75496 JB |
18847 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
18848 | } | |
18849 | } | |
cb1df416 DJ |
18850 | else |
18851 | { | |
18852 | /* Make sure a symtab is created for every file, even files | |
18853 | which contain only variables (i.e. no code with associated | |
18854 | line numbers). */ | |
43f3e411 | 18855 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 18856 | int i; |
cb1df416 | 18857 | |
fff8551c | 18858 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 18859 | { |
8c43009f | 18860 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 18861 | |
8c43009f | 18862 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 18863 | |
cb1df416 | 18864 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
18865 | { |
18866 | current_subfile->symtab | |
18867 | = allocate_symtab (cust, current_subfile->name); | |
18868 | } | |
8c43009f | 18869 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
18870 | } |
18871 | } | |
c906108c SS |
18872 | } |
18873 | ||
18874 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
18875 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 18876 | or NULL if not known. |
c906108c SS |
18877 | This routine tries to keep line numbers from identical absolute and |
18878 | relative file names in a common subfile. | |
18879 | ||
18880 | Using the `list' example from the GDB testsuite, which resides in | |
18881 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
18882 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
18883 | ||
c5aa993b | 18884 | DW_AT_name: /srcdir/list0.c |
4d663531 | 18885 | DW_AT_comp_dir: /compdir |
357e46e7 | 18886 | files.files[0].name: list0.h |
c5aa993b | 18887 | files.files[0].dir: /srcdir |
357e46e7 | 18888 | files.files[1].name: list0.c |
c5aa993b | 18889 | files.files[1].dir: /srcdir |
c906108c SS |
18890 | |
18891 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
18892 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
18893 | start_subfile will ensure that this happens provided that we pass the | |
18894 | concatenation of files.files[1].dir and files.files[1].name as the | |
18895 | subfile's name. */ | |
c906108c SS |
18896 | |
18897 | static void | |
4d663531 | 18898 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 18899 | { |
d521ce57 | 18900 | char *copy = NULL; |
4f1520fb | 18901 | |
4d663531 | 18902 | /* In order not to lose the line information directory, |
4f1520fb FR |
18903 | we concatenate it to the filename when it makes sense. |
18904 | Note that the Dwarf3 standard says (speaking of filenames in line | |
18905 | information): ``The directory index is ignored for file names | |
18906 | that represent full path names''. Thus ignoring dirname in the | |
18907 | `else' branch below isn't an issue. */ | |
c906108c | 18908 | |
d5166ae1 | 18909 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
18910 | { |
18911 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
18912 | filename = copy; | |
18913 | } | |
c906108c | 18914 | |
4d663531 | 18915 | start_subfile (filename); |
4f1520fb | 18916 | |
d521ce57 TT |
18917 | if (copy != NULL) |
18918 | xfree (copy); | |
c906108c SS |
18919 | } |
18920 | ||
f4dc4d17 DE |
18921 | /* Start a symtab for DWARF. |
18922 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
18923 | ||
43f3e411 | 18924 | static struct compunit_symtab * |
f4dc4d17 | 18925 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 18926 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 18927 | { |
43f3e411 DE |
18928 | struct compunit_symtab *cust |
18929 | = start_symtab (cu->objfile, name, comp_dir, low_pc); | |
18930 | ||
f4dc4d17 DE |
18931 | record_debugformat ("DWARF 2"); |
18932 | record_producer (cu->producer); | |
18933 | ||
18934 | /* We assume that we're processing GCC output. */ | |
18935 | processing_gcc_compilation = 2; | |
18936 | ||
4d4ec4e5 | 18937 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
18938 | |
18939 | return cust; | |
f4dc4d17 DE |
18940 | } |
18941 | ||
4c2df51b DJ |
18942 | static void |
18943 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18944 | struct dwarf2_cu *cu) |
4c2df51b | 18945 | { |
e7c27a73 DJ |
18946 | struct objfile *objfile = cu->objfile; |
18947 | struct comp_unit_head *cu_header = &cu->header; | |
18948 | ||
4c2df51b DJ |
18949 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
18950 | code here to turn a symbol with DW_AT_external and a | |
18951 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
18952 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
18953 | with some versions of binutils) where shared libraries could have | |
18954 | relocations against symbols in their debug information - the | |
18955 | minimal symbol would have the right address, but the debug info | |
18956 | would not. It's no longer necessary, because we will explicitly | |
18957 | apply relocations when we read in the debug information now. */ | |
18958 | ||
18959 | /* A DW_AT_location attribute with no contents indicates that a | |
18960 | variable has been optimized away. */ | |
18961 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
18962 | { | |
f1e6e072 | 18963 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
18964 | return; |
18965 | } | |
18966 | ||
18967 | /* Handle one degenerate form of location expression specially, to | |
18968 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
18969 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
18970 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
18971 | |
18972 | if (attr_form_is_block (attr) | |
3019eac3 DE |
18973 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
18974 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
18975 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
18976 | && (DW_BLOCK (attr)->size | |
18977 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 18978 | { |
891d2f0b | 18979 | unsigned int dummy; |
4c2df51b | 18980 | |
3019eac3 DE |
18981 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
18982 | SYMBOL_VALUE_ADDRESS (sym) = | |
18983 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
18984 | else | |
18985 | SYMBOL_VALUE_ADDRESS (sym) = | |
18986 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 18987 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
18988 | fixup_symbol_section (sym, objfile); |
18989 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
18990 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
18991 | return; |
18992 | } | |
18993 | ||
18994 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
18995 | expression evaluator, and use LOC_COMPUTED only when necessary | |
18996 | (i.e. when the value of a register or memory location is | |
18997 | referenced, or a thread-local block, etc.). Then again, it might | |
18998 | not be worthwhile. I'm assuming that it isn't unless performance | |
18999 | or memory numbers show me otherwise. */ | |
19000 | ||
f1e6e072 | 19001 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19002 | |
f1e6e072 | 19003 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19004 | cu->has_loclist = 1; |
4c2df51b DJ |
19005 | } |
19006 | ||
c906108c SS |
19007 | /* Given a pointer to a DWARF information entry, figure out if we need |
19008 | to make a symbol table entry for it, and if so, create a new entry | |
19009 | and return a pointer to it. | |
19010 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19011 | used the passed type. |
19012 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19013 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19014 | |
19015 | static struct symbol * | |
34eaf542 TT |
19016 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19017 | struct symbol *space) | |
c906108c | 19018 | { |
e7c27a73 | 19019 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19020 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19021 | struct symbol *sym = NULL; |
15d034d0 | 19022 | const char *name; |
c906108c SS |
19023 | struct attribute *attr = NULL; |
19024 | struct attribute *attr2 = NULL; | |
e142c38c | 19025 | CORE_ADDR baseaddr; |
e37fd15a SW |
19026 | struct pending **list_to_add = NULL; |
19027 | ||
edb3359d | 19028 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19029 | |
19030 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19031 | |
94af9270 | 19032 | name = dwarf2_name (die, cu); |
c906108c SS |
19033 | if (name) |
19034 | { | |
94af9270 | 19035 | const char *linkagename; |
34eaf542 | 19036 | int suppress_add = 0; |
94af9270 | 19037 | |
34eaf542 TT |
19038 | if (space) |
19039 | sym = space; | |
19040 | else | |
e623cf5d | 19041 | sym = allocate_symbol (objfile); |
c906108c | 19042 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19043 | |
19044 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19045 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19046 | linkagename = dwarf2_physname (name, die, cu); |
19047 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19048 | |
f55ee35c JK |
19049 | /* Fortran does not have mangling standard and the mangling does differ |
19050 | between gfortran, iFort etc. */ | |
19051 | if (cu->language == language_fortran | |
b250c185 | 19052 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19053 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19054 | dwarf2_full_name (name, die, cu), |
29df156d | 19055 | NULL); |
f55ee35c | 19056 | |
c906108c | 19057 | /* Default assumptions. |
c5aa993b | 19058 | Use the passed type or decode it from the die. */ |
176620f1 | 19059 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19060 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19061 | if (type != NULL) |
19062 | SYMBOL_TYPE (sym) = type; | |
19063 | else | |
e7c27a73 | 19064 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19065 | attr = dwarf2_attr (die, |
19066 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19067 | cu); | |
c906108c SS |
19068 | if (attr) |
19069 | { | |
19070 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19071 | } | |
cb1df416 | 19072 | |
edb3359d DJ |
19073 | attr = dwarf2_attr (die, |
19074 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19075 | cu); | |
cb1df416 DJ |
19076 | if (attr) |
19077 | { | |
ecfb656c | 19078 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 19079 | struct file_entry *fe; |
9a619af0 | 19080 | |
ecfb656c PA |
19081 | if (cu->line_header != NULL) |
19082 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
19083 | else |
19084 | fe = NULL; | |
19085 | ||
19086 | if (fe == NULL) | |
cb1df416 DJ |
19087 | complaint (&symfile_complaints, |
19088 | _("file index out of range")); | |
8c43009f PA |
19089 | else |
19090 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
19091 | } |
19092 | ||
c906108c SS |
19093 | switch (die->tag) |
19094 | { | |
19095 | case DW_TAG_label: | |
e142c38c | 19096 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 19097 | if (attr) |
3e29f34a MR |
19098 | { |
19099 | CORE_ADDR addr; | |
19100 | ||
19101 | addr = attr_value_as_address (attr); | |
19102 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
19103 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
19104 | } | |
0f5238ed TT |
19105 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
19106 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 19107 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 19108 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
19109 | break; |
19110 | case DW_TAG_subprogram: | |
19111 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19112 | finish_block. */ | |
f1e6e072 | 19113 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 19114 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
19115 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
19116 | || cu->language == language_ada) | |
c906108c | 19117 | { |
2cfa0c8d JB |
19118 | /* Subprograms marked external are stored as a global symbol. |
19119 | Ada subprograms, whether marked external or not, are always | |
19120 | stored as a global symbol, because we want to be able to | |
19121 | access them globally. For instance, we want to be able | |
19122 | to break on a nested subprogram without having to | |
19123 | specify the context. */ | |
e37fd15a | 19124 | list_to_add = &global_symbols; |
c906108c SS |
19125 | } |
19126 | else | |
19127 | { | |
e37fd15a | 19128 | list_to_add = cu->list_in_scope; |
c906108c SS |
19129 | } |
19130 | break; | |
edb3359d DJ |
19131 | case DW_TAG_inlined_subroutine: |
19132 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19133 | finish_block. */ | |
f1e6e072 | 19134 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 19135 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 19136 | list_to_add = cu->list_in_scope; |
edb3359d | 19137 | break; |
34eaf542 TT |
19138 | case DW_TAG_template_value_param: |
19139 | suppress_add = 1; | |
19140 | /* Fall through. */ | |
72929c62 | 19141 | case DW_TAG_constant: |
c906108c | 19142 | case DW_TAG_variable: |
254e6b9e | 19143 | case DW_TAG_member: |
0963b4bd MS |
19144 | /* Compilation with minimal debug info may result in |
19145 | variables with missing type entries. Change the | |
19146 | misleading `void' type to something sensible. */ | |
c906108c | 19147 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 19148 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 19149 | |
e142c38c | 19150 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
19151 | /* In the case of DW_TAG_member, we should only be called for |
19152 | static const members. */ | |
19153 | if (die->tag == DW_TAG_member) | |
19154 | { | |
3863f96c DE |
19155 | /* dwarf2_add_field uses die_is_declaration, |
19156 | so we do the same. */ | |
254e6b9e DE |
19157 | gdb_assert (die_is_declaration (die, cu)); |
19158 | gdb_assert (attr); | |
19159 | } | |
c906108c SS |
19160 | if (attr) |
19161 | { | |
e7c27a73 | 19162 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 19163 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 19164 | if (!suppress_add) |
34eaf542 TT |
19165 | { |
19166 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 19167 | list_to_add = &global_symbols; |
34eaf542 | 19168 | else |
e37fd15a | 19169 | list_to_add = cu->list_in_scope; |
34eaf542 | 19170 | } |
c906108c SS |
19171 | break; |
19172 | } | |
e142c38c | 19173 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19174 | if (attr) |
19175 | { | |
e7c27a73 | 19176 | var_decode_location (attr, sym, cu); |
e142c38c | 19177 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
19178 | |
19179 | /* Fortran explicitly imports any global symbols to the local | |
19180 | scope by DW_TAG_common_block. */ | |
19181 | if (cu->language == language_fortran && die->parent | |
19182 | && die->parent->tag == DW_TAG_common_block) | |
19183 | attr2 = NULL; | |
19184 | ||
caac4577 JG |
19185 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
19186 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
19187 | && !dwarf2_per_objfile->has_section_at_zero) | |
19188 | { | |
19189 | /* When a static variable is eliminated by the linker, | |
19190 | the corresponding debug information is not stripped | |
19191 | out, but the variable address is set to null; | |
19192 | do not add such variables into symbol table. */ | |
19193 | } | |
19194 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 19195 | { |
f55ee35c JK |
19196 | /* Workaround gfortran PR debug/40040 - it uses |
19197 | DW_AT_location for variables in -fPIC libraries which may | |
19198 | get overriden by other libraries/executable and get | |
19199 | a different address. Resolve it by the minimal symbol | |
19200 | which may come from inferior's executable using copy | |
19201 | relocation. Make this workaround only for gfortran as for | |
19202 | other compilers GDB cannot guess the minimal symbol | |
19203 | Fortran mangling kind. */ | |
19204 | if (cu->language == language_fortran && die->parent | |
19205 | && die->parent->tag == DW_TAG_module | |
19206 | && cu->producer | |
28586665 | 19207 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 19208 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 19209 | |
1c809c68 TT |
19210 | /* A variable with DW_AT_external is never static, |
19211 | but it may be block-scoped. */ | |
19212 | list_to_add = (cu->list_in_scope == &file_symbols | |
19213 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 19214 | } |
c906108c | 19215 | else |
e37fd15a | 19216 | list_to_add = cu->list_in_scope; |
c906108c SS |
19217 | } |
19218 | else | |
19219 | { | |
19220 | /* We do not know the address of this symbol. | |
c5aa993b JM |
19221 | If it is an external symbol and we have type information |
19222 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
19223 | The address of the variable will then be determined from | |
19224 | the minimal symbol table whenever the variable is | |
19225 | referenced. */ | |
e142c38c | 19226 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
19227 | |
19228 | /* Fortran explicitly imports any global symbols to the local | |
19229 | scope by DW_TAG_common_block. */ | |
19230 | if (cu->language == language_fortran && die->parent | |
19231 | && die->parent->tag == DW_TAG_common_block) | |
19232 | { | |
19233 | /* SYMBOL_CLASS doesn't matter here because | |
19234 | read_common_block is going to reset it. */ | |
19235 | if (!suppress_add) | |
19236 | list_to_add = cu->list_in_scope; | |
19237 | } | |
19238 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
19239 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 19240 | { |
0fe7935b DJ |
19241 | /* A variable with DW_AT_external is never static, but it |
19242 | may be block-scoped. */ | |
19243 | list_to_add = (cu->list_in_scope == &file_symbols | |
19244 | ? &global_symbols : cu->list_in_scope); | |
19245 | ||
f1e6e072 | 19246 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 19247 | } |
442ddf59 JK |
19248 | else if (!die_is_declaration (die, cu)) |
19249 | { | |
19250 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
19251 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
19252 | if (!suppress_add) |
19253 | list_to_add = cu->list_in_scope; | |
442ddf59 | 19254 | } |
c906108c SS |
19255 | } |
19256 | break; | |
19257 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
19258 | /* If we are inside a function, mark this as an argument. If |
19259 | not, we might be looking at an argument to an inlined function | |
19260 | when we do not have enough information to show inlined frames; | |
19261 | pretend it's a local variable in that case so that the user can | |
19262 | still see it. */ | |
19263 | if (context_stack_depth > 0 | |
19264 | && context_stack[context_stack_depth - 1].name != NULL) | |
19265 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 19266 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19267 | if (attr) |
19268 | { | |
e7c27a73 | 19269 | var_decode_location (attr, sym, cu); |
c906108c | 19270 | } |
e142c38c | 19271 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19272 | if (attr) |
19273 | { | |
e7c27a73 | 19274 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19275 | } |
f346a30d | 19276 | |
e37fd15a | 19277 | list_to_add = cu->list_in_scope; |
c906108c SS |
19278 | break; |
19279 | case DW_TAG_unspecified_parameters: | |
19280 | /* From varargs functions; gdb doesn't seem to have any | |
19281 | interest in this information, so just ignore it for now. | |
19282 | (FIXME?) */ | |
19283 | break; | |
34eaf542 TT |
19284 | case DW_TAG_template_type_param: |
19285 | suppress_add = 1; | |
19286 | /* Fall through. */ | |
c906108c | 19287 | case DW_TAG_class_type: |
680b30c7 | 19288 | case DW_TAG_interface_type: |
c906108c SS |
19289 | case DW_TAG_structure_type: |
19290 | case DW_TAG_union_type: | |
72019c9c | 19291 | case DW_TAG_set_type: |
c906108c | 19292 | case DW_TAG_enumeration_type: |
f1e6e072 | 19293 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19294 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 19295 | |
63d06c5c | 19296 | { |
9c37b5ae | 19297 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
19298 | really ever be static objects: otherwise, if you try |
19299 | to, say, break of a class's method and you're in a file | |
19300 | which doesn't mention that class, it won't work unless | |
19301 | the check for all static symbols in lookup_symbol_aux | |
19302 | saves you. See the OtherFileClass tests in | |
19303 | gdb.c++/namespace.exp. */ | |
19304 | ||
e37fd15a | 19305 | if (!suppress_add) |
34eaf542 | 19306 | { |
34eaf542 | 19307 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19308 | && cu->language == language_cplus |
34eaf542 | 19309 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19310 | |
64382290 | 19311 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 19312 | ... }" also defines a typedef for "foo". */ |
64382290 | 19313 | if (cu->language == language_cplus |
45280282 | 19314 | || cu->language == language_ada |
c44af4eb TT |
19315 | || cu->language == language_d |
19316 | || cu->language == language_rust) | |
64382290 TT |
19317 | { |
19318 | /* The symbol's name is already allocated along | |
19319 | with this objfile, so we don't need to | |
19320 | duplicate it for the type. */ | |
19321 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
19322 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
19323 | } | |
63d06c5c DC |
19324 | } |
19325 | } | |
c906108c SS |
19326 | break; |
19327 | case DW_TAG_typedef: | |
f1e6e072 | 19328 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 19329 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19330 | list_to_add = cu->list_in_scope; |
63d06c5c | 19331 | break; |
c906108c | 19332 | case DW_TAG_base_type: |
a02abb62 | 19333 | case DW_TAG_subrange_type: |
f1e6e072 | 19334 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19335 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19336 | list_to_add = cu->list_in_scope; |
c906108c SS |
19337 | break; |
19338 | case DW_TAG_enumerator: | |
e142c38c | 19339 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19340 | if (attr) |
19341 | { | |
e7c27a73 | 19342 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19343 | } |
63d06c5c DC |
19344 | { |
19345 | /* NOTE: carlton/2003-11-10: See comment above in the | |
19346 | DW_TAG_class_type, etc. block. */ | |
19347 | ||
e142c38c | 19348 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19349 | && cu->language == language_cplus |
e142c38c | 19350 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19351 | } |
c906108c | 19352 | break; |
74921315 | 19353 | case DW_TAG_imported_declaration: |
5c4e30ca | 19354 | case DW_TAG_namespace: |
f1e6e072 | 19355 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 19356 | list_to_add = &global_symbols; |
5c4e30ca | 19357 | break; |
530e8392 KB |
19358 | case DW_TAG_module: |
19359 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
19360 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
19361 | list_to_add = &global_symbols; | |
19362 | break; | |
4357ac6c | 19363 | case DW_TAG_common_block: |
f1e6e072 | 19364 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
19365 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
19366 | add_symbol_to_list (sym, cu->list_in_scope); | |
19367 | break; | |
c906108c SS |
19368 | default: |
19369 | /* Not a tag we recognize. Hopefully we aren't processing | |
19370 | trash data, but since we must specifically ignore things | |
19371 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 19372 | this point. */ |
e2e0b3e5 | 19373 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 19374 | dwarf_tag_name (die->tag)); |
c906108c SS |
19375 | break; |
19376 | } | |
df8a16a1 | 19377 | |
e37fd15a SW |
19378 | if (suppress_add) |
19379 | { | |
19380 | sym->hash_next = objfile->template_symbols; | |
19381 | objfile->template_symbols = sym; | |
19382 | list_to_add = NULL; | |
19383 | } | |
19384 | ||
19385 | if (list_to_add != NULL) | |
19386 | add_symbol_to_list (sym, list_to_add); | |
19387 | ||
df8a16a1 DJ |
19388 | /* For the benefit of old versions of GCC, check for anonymous |
19389 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 19390 | if (!cu->processing_has_namespace_info |
94af9270 | 19391 | && cu->language == language_cplus) |
a10964d1 | 19392 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
19393 | } |
19394 | return (sym); | |
19395 | } | |
19396 | ||
34eaf542 TT |
19397 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
19398 | ||
19399 | static struct symbol * | |
19400 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
19401 | { | |
19402 | return new_symbol_full (die, type, cu, NULL); | |
19403 | } | |
19404 | ||
98bfdba5 PA |
19405 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
19406 | zero-extend it as appropriate for the symbol's type. The DWARF | |
19407 | standard (v4) is not entirely clear about the meaning of using | |
19408 | DW_FORM_dataN for a constant with a signed type, where the type is | |
19409 | wider than the data. The conclusion of a discussion on the DWARF | |
19410 | list was that this is unspecified. We choose to always zero-extend | |
19411 | because that is the interpretation long in use by GCC. */ | |
c906108c | 19412 | |
98bfdba5 | 19413 | static gdb_byte * |
ff39bb5e | 19414 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 19415 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 19416 | { |
e7c27a73 | 19417 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
19418 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
19419 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
19420 | LONGEST l = DW_UNSND (attr); |
19421 | ||
19422 | if (bits < sizeof (*value) * 8) | |
19423 | { | |
19424 | l &= ((LONGEST) 1 << bits) - 1; | |
19425 | *value = l; | |
19426 | } | |
19427 | else if (bits == sizeof (*value) * 8) | |
19428 | *value = l; | |
19429 | else | |
19430 | { | |
224c3ddb | 19431 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
19432 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
19433 | return bytes; | |
19434 | } | |
19435 | ||
19436 | return NULL; | |
19437 | } | |
19438 | ||
19439 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
19440 | the value does not fit in *VALUE, set *BYTES - either already | |
19441 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
19442 | or, set *BATON, if we translated the constant to a location | |
19443 | expression. */ | |
19444 | ||
19445 | static void | |
ff39bb5e | 19446 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
19447 | const char *name, struct obstack *obstack, |
19448 | struct dwarf2_cu *cu, | |
d521ce57 | 19449 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
19450 | struct dwarf2_locexpr_baton **baton) |
19451 | { | |
19452 | struct objfile *objfile = cu->objfile; | |
19453 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 19454 | struct dwarf_block *blk; |
98bfdba5 PA |
19455 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
19456 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
19457 | ||
19458 | *value = 0; | |
19459 | *bytes = NULL; | |
19460 | *baton = NULL; | |
c906108c SS |
19461 | |
19462 | switch (attr->form) | |
19463 | { | |
19464 | case DW_FORM_addr: | |
3019eac3 | 19465 | case DW_FORM_GNU_addr_index: |
ac56253d | 19466 | { |
ac56253d TT |
19467 | gdb_byte *data; |
19468 | ||
98bfdba5 PA |
19469 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
19470 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 19471 | cu_header->addr_size, |
98bfdba5 | 19472 | TYPE_LENGTH (type)); |
ac56253d TT |
19473 | /* Symbols of this form are reasonably rare, so we just |
19474 | piggyback on the existing location code rather than writing | |
19475 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 19476 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
19477 | (*baton)->per_cu = cu->per_cu; |
19478 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 19479 | |
98bfdba5 | 19480 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 19481 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 19482 | (*baton)->data = data; |
ac56253d TT |
19483 | |
19484 | data[0] = DW_OP_addr; | |
19485 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
19486 | byte_order, DW_ADDR (attr)); | |
19487 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 19488 | } |
c906108c | 19489 | break; |
4ac36638 | 19490 | case DW_FORM_string: |
93b5768b | 19491 | case DW_FORM_strp: |
3019eac3 | 19492 | case DW_FORM_GNU_str_index: |
36586728 | 19493 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
19494 | /* DW_STRING is already allocated on the objfile obstack, point |
19495 | directly to it. */ | |
d521ce57 | 19496 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 19497 | break; |
c906108c SS |
19498 | case DW_FORM_block1: |
19499 | case DW_FORM_block2: | |
19500 | case DW_FORM_block4: | |
19501 | case DW_FORM_block: | |
2dc7f7b3 | 19502 | case DW_FORM_exprloc: |
0224619f | 19503 | case DW_FORM_data16: |
c906108c | 19504 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
19505 | if (TYPE_LENGTH (type) != blk->size) |
19506 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
19507 | TYPE_LENGTH (type)); | |
19508 | *bytes = blk->data; | |
c906108c | 19509 | break; |
2df3850c JM |
19510 | |
19511 | /* The DW_AT_const_value attributes are supposed to carry the | |
19512 | symbol's value "represented as it would be on the target | |
19513 | architecture." By the time we get here, it's already been | |
19514 | converted to host endianness, so we just need to sign- or | |
19515 | zero-extend it as appropriate. */ | |
19516 | case DW_FORM_data1: | |
3aef2284 | 19517 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 19518 | break; |
c906108c | 19519 | case DW_FORM_data2: |
3aef2284 | 19520 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 19521 | break; |
c906108c | 19522 | case DW_FORM_data4: |
3aef2284 | 19523 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 19524 | break; |
c906108c | 19525 | case DW_FORM_data8: |
3aef2284 | 19526 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
19527 | break; |
19528 | ||
c906108c | 19529 | case DW_FORM_sdata: |
663c44ac | 19530 | case DW_FORM_implicit_const: |
98bfdba5 | 19531 | *value = DW_SND (attr); |
2df3850c JM |
19532 | break; |
19533 | ||
c906108c | 19534 | case DW_FORM_udata: |
98bfdba5 | 19535 | *value = DW_UNSND (attr); |
c906108c | 19536 | break; |
2df3850c | 19537 | |
c906108c | 19538 | default: |
4d3c2250 | 19539 | complaint (&symfile_complaints, |
e2e0b3e5 | 19540 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 19541 | dwarf_form_name (attr->form)); |
98bfdba5 | 19542 | *value = 0; |
c906108c SS |
19543 | break; |
19544 | } | |
19545 | } | |
19546 | ||
2df3850c | 19547 | |
98bfdba5 PA |
19548 | /* Copy constant value from an attribute to a symbol. */ |
19549 | ||
2df3850c | 19550 | static void |
ff39bb5e | 19551 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 19552 | struct dwarf2_cu *cu) |
2df3850c | 19553 | { |
98bfdba5 | 19554 | struct objfile *objfile = cu->objfile; |
12df843f | 19555 | LONGEST value; |
d521ce57 | 19556 | const gdb_byte *bytes; |
98bfdba5 | 19557 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 19558 | |
98bfdba5 PA |
19559 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
19560 | SYMBOL_PRINT_NAME (sym), | |
19561 | &objfile->objfile_obstack, cu, | |
19562 | &value, &bytes, &baton); | |
2df3850c | 19563 | |
98bfdba5 PA |
19564 | if (baton != NULL) |
19565 | { | |
98bfdba5 | 19566 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 19567 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
19568 | } |
19569 | else if (bytes != NULL) | |
19570 | { | |
19571 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 19572 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
19573 | } |
19574 | else | |
19575 | { | |
19576 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 19577 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 19578 | } |
2df3850c JM |
19579 | } |
19580 | ||
c906108c SS |
19581 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
19582 | ||
19583 | static struct type * | |
e7c27a73 | 19584 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19585 | { |
c906108c | 19586 | struct attribute *type_attr; |
c906108c | 19587 | |
e142c38c | 19588 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
19589 | if (!type_attr) |
19590 | { | |
19591 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 19592 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 19593 | } |
348e048f | 19594 | |
673bfd45 | 19595 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
19596 | } |
19597 | ||
b4ba55a1 JB |
19598 | /* True iff CU's producer generates GNAT Ada auxiliary information |
19599 | that allows to find parallel types through that information instead | |
19600 | of having to do expensive parallel lookups by type name. */ | |
19601 | ||
19602 | static int | |
19603 | need_gnat_info (struct dwarf2_cu *cu) | |
19604 | { | |
19605 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
19606 | of GNAT produces this auxiliary information, without any indication | |
19607 | that it is produced. Part of enhancing the FSF version of GNAT | |
19608 | to produce that information will be to put in place an indicator | |
19609 | that we can use in order to determine whether the descriptive type | |
19610 | info is available or not. One suggestion that has been made is | |
19611 | to use a new attribute, attached to the CU die. For now, assume | |
19612 | that the descriptive type info is not available. */ | |
19613 | return 0; | |
19614 | } | |
19615 | ||
b4ba55a1 JB |
19616 | /* Return the auxiliary type of the die in question using its |
19617 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
19618 | attribute is not present. */ | |
19619 | ||
19620 | static struct type * | |
19621 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
19622 | { | |
b4ba55a1 | 19623 | struct attribute *type_attr; |
b4ba55a1 JB |
19624 | |
19625 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
19626 | if (!type_attr) | |
19627 | return NULL; | |
19628 | ||
673bfd45 | 19629 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
19630 | } |
19631 | ||
19632 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
19633 | descriptive type accordingly. */ | |
19634 | ||
19635 | static void | |
19636 | set_descriptive_type (struct type *type, struct die_info *die, | |
19637 | struct dwarf2_cu *cu) | |
19638 | { | |
19639 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
19640 | ||
19641 | if (descriptive_type) | |
19642 | { | |
19643 | ALLOCATE_GNAT_AUX_TYPE (type); | |
19644 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
19645 | } | |
19646 | } | |
19647 | ||
c906108c SS |
19648 | /* Return the containing type of the die in question using its |
19649 | DW_AT_containing_type attribute. */ | |
19650 | ||
19651 | static struct type * | |
e7c27a73 | 19652 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19653 | { |
c906108c | 19654 | struct attribute *type_attr; |
c906108c | 19655 | |
e142c38c | 19656 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
19657 | if (!type_attr) |
19658 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 19659 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 19660 | |
673bfd45 | 19661 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
19662 | } |
19663 | ||
ac9ec31b DE |
19664 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
19665 | ||
19666 | static struct type * | |
19667 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
19668 | { | |
19669 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19670 | char *message, *saved; | |
19671 | ||
19672 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 19673 | objfile_name (objfile), |
9c541725 PA |
19674 | to_underlying (cu->header.sect_off), |
19675 | to_underlying (die->sect_off)); | |
224c3ddb SM |
19676 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
19677 | message, strlen (message)); | |
ac9ec31b DE |
19678 | xfree (message); |
19679 | ||
19f392bc | 19680 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
19681 | } |
19682 | ||
673bfd45 | 19683 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
19684 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
19685 | DW_AT_containing_type. | |
673bfd45 DE |
19686 | If there is no type substitute an error marker. */ |
19687 | ||
c906108c | 19688 | static struct type * |
ff39bb5e | 19689 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 19690 | struct dwarf2_cu *cu) |
c906108c | 19691 | { |
bb5ed363 | 19692 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
19693 | struct type *this_type; |
19694 | ||
ac9ec31b DE |
19695 | gdb_assert (attr->name == DW_AT_type |
19696 | || attr->name == DW_AT_GNAT_descriptive_type | |
19697 | || attr->name == DW_AT_containing_type); | |
19698 | ||
673bfd45 DE |
19699 | /* First see if we have it cached. */ |
19700 | ||
36586728 TT |
19701 | if (attr->form == DW_FORM_GNU_ref_alt) |
19702 | { | |
19703 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 19704 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 19705 | |
9c541725 PA |
19706 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
19707 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 19708 | } |
7771576e | 19709 | else if (attr_form_is_ref (attr)) |
673bfd45 | 19710 | { |
9c541725 | 19711 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 19712 | |
9c541725 | 19713 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 19714 | } |
55f1336d | 19715 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 19716 | { |
ac9ec31b | 19717 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 19718 | |
ac9ec31b | 19719 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
19720 | } |
19721 | else | |
19722 | { | |
ac9ec31b DE |
19723 | complaint (&symfile_complaints, |
19724 | _("Dwarf Error: Bad type attribute %s in DIE" | |
19725 | " at 0x%x [in module %s]"), | |
9c541725 | 19726 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 19727 | objfile_name (objfile)); |
ac9ec31b | 19728 | return build_error_marker_type (cu, die); |
673bfd45 DE |
19729 | } |
19730 | ||
19731 | /* If not cached we need to read it in. */ | |
19732 | ||
19733 | if (this_type == NULL) | |
19734 | { | |
ac9ec31b | 19735 | struct die_info *type_die = NULL; |
673bfd45 DE |
19736 | struct dwarf2_cu *type_cu = cu; |
19737 | ||
7771576e | 19738 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19739 | type_die = follow_die_ref (die, attr, &type_cu); |
19740 | if (type_die == NULL) | |
19741 | return build_error_marker_type (cu, die); | |
19742 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
19743 | from an inter-CU reference and the type's CU got expanded before |
19744 | ours. */ | |
ac9ec31b | 19745 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
19746 | } |
19747 | ||
19748 | /* If we still don't have a type use an error marker. */ | |
19749 | ||
19750 | if (this_type == NULL) | |
ac9ec31b | 19751 | return build_error_marker_type (cu, die); |
673bfd45 | 19752 | |
f792889a | 19753 | return this_type; |
c906108c SS |
19754 | } |
19755 | ||
673bfd45 DE |
19756 | /* Return the type in DIE, CU. |
19757 | Returns NULL for invalid types. | |
19758 | ||
02142a6c | 19759 | This first does a lookup in die_type_hash, |
673bfd45 DE |
19760 | and only reads the die in if necessary. |
19761 | ||
19762 | NOTE: This can be called when reading in partial or full symbols. */ | |
19763 | ||
f792889a | 19764 | static struct type * |
e7c27a73 | 19765 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19766 | { |
f792889a DJ |
19767 | struct type *this_type; |
19768 | ||
19769 | this_type = get_die_type (die, cu); | |
19770 | if (this_type) | |
19771 | return this_type; | |
19772 | ||
673bfd45 DE |
19773 | return read_type_die_1 (die, cu); |
19774 | } | |
19775 | ||
19776 | /* Read the type in DIE, CU. | |
19777 | Returns NULL for invalid types. */ | |
19778 | ||
19779 | static struct type * | |
19780 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
19781 | { | |
19782 | struct type *this_type = NULL; | |
19783 | ||
c906108c SS |
19784 | switch (die->tag) |
19785 | { | |
19786 | case DW_TAG_class_type: | |
680b30c7 | 19787 | case DW_TAG_interface_type: |
c906108c SS |
19788 | case DW_TAG_structure_type: |
19789 | case DW_TAG_union_type: | |
f792889a | 19790 | this_type = read_structure_type (die, cu); |
c906108c SS |
19791 | break; |
19792 | case DW_TAG_enumeration_type: | |
f792889a | 19793 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
19794 | break; |
19795 | case DW_TAG_subprogram: | |
19796 | case DW_TAG_subroutine_type: | |
edb3359d | 19797 | case DW_TAG_inlined_subroutine: |
f792889a | 19798 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
19799 | break; |
19800 | case DW_TAG_array_type: | |
f792889a | 19801 | this_type = read_array_type (die, cu); |
c906108c | 19802 | break; |
72019c9c | 19803 | case DW_TAG_set_type: |
f792889a | 19804 | this_type = read_set_type (die, cu); |
72019c9c | 19805 | break; |
c906108c | 19806 | case DW_TAG_pointer_type: |
f792889a | 19807 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
19808 | break; |
19809 | case DW_TAG_ptr_to_member_type: | |
f792889a | 19810 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
19811 | break; |
19812 | case DW_TAG_reference_type: | |
4297a3f0 AV |
19813 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
19814 | break; | |
19815 | case DW_TAG_rvalue_reference_type: | |
19816 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
19817 | break; |
19818 | case DW_TAG_const_type: | |
f792889a | 19819 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
19820 | break; |
19821 | case DW_TAG_volatile_type: | |
f792889a | 19822 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 19823 | break; |
06d66ee9 TT |
19824 | case DW_TAG_restrict_type: |
19825 | this_type = read_tag_restrict_type (die, cu); | |
19826 | break; | |
c906108c | 19827 | case DW_TAG_string_type: |
f792889a | 19828 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
19829 | break; |
19830 | case DW_TAG_typedef: | |
f792889a | 19831 | this_type = read_typedef (die, cu); |
c906108c | 19832 | break; |
a02abb62 | 19833 | case DW_TAG_subrange_type: |
f792889a | 19834 | this_type = read_subrange_type (die, cu); |
a02abb62 | 19835 | break; |
c906108c | 19836 | case DW_TAG_base_type: |
f792889a | 19837 | this_type = read_base_type (die, cu); |
c906108c | 19838 | break; |
81a17f79 | 19839 | case DW_TAG_unspecified_type: |
f792889a | 19840 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 19841 | break; |
0114d602 DJ |
19842 | case DW_TAG_namespace: |
19843 | this_type = read_namespace_type (die, cu); | |
19844 | break; | |
f55ee35c JK |
19845 | case DW_TAG_module: |
19846 | this_type = read_module_type (die, cu); | |
19847 | break; | |
a2c2acaf MW |
19848 | case DW_TAG_atomic_type: |
19849 | this_type = read_tag_atomic_type (die, cu); | |
19850 | break; | |
c906108c | 19851 | default: |
3e43a32a MS |
19852 | complaint (&symfile_complaints, |
19853 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 19854 | dwarf_tag_name (die->tag)); |
c906108c SS |
19855 | break; |
19856 | } | |
63d06c5c | 19857 | |
f792889a | 19858 | return this_type; |
63d06c5c DC |
19859 | } |
19860 | ||
abc72ce4 DE |
19861 | /* See if we can figure out if the class lives in a namespace. We do |
19862 | this by looking for a member function; its demangled name will | |
19863 | contain namespace info, if there is any. | |
19864 | Return the computed name or NULL. | |
19865 | Space for the result is allocated on the objfile's obstack. | |
19866 | This is the full-die version of guess_partial_die_structure_name. | |
19867 | In this case we know DIE has no useful parent. */ | |
19868 | ||
19869 | static char * | |
19870 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
19871 | { | |
19872 | struct die_info *spec_die; | |
19873 | struct dwarf2_cu *spec_cu; | |
19874 | struct die_info *child; | |
19875 | ||
19876 | spec_cu = cu; | |
19877 | spec_die = die_specification (die, &spec_cu); | |
19878 | if (spec_die != NULL) | |
19879 | { | |
19880 | die = spec_die; | |
19881 | cu = spec_cu; | |
19882 | } | |
19883 | ||
19884 | for (child = die->child; | |
19885 | child != NULL; | |
19886 | child = child->sibling) | |
19887 | { | |
19888 | if (child->tag == DW_TAG_subprogram) | |
19889 | { | |
73b9be8b | 19890 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 19891 | |
7d45c7c3 | 19892 | if (linkage_name != NULL) |
abc72ce4 DE |
19893 | { |
19894 | char *actual_name | |
19895 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 19896 | linkage_name); |
abc72ce4 DE |
19897 | char *name = NULL; |
19898 | ||
19899 | if (actual_name != NULL) | |
19900 | { | |
15d034d0 | 19901 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
19902 | |
19903 | if (die_name != NULL | |
19904 | && strcmp (die_name, actual_name) != 0) | |
19905 | { | |
19906 | /* Strip off the class name from the full name. | |
19907 | We want the prefix. */ | |
19908 | int die_name_len = strlen (die_name); | |
19909 | int actual_name_len = strlen (actual_name); | |
19910 | ||
19911 | /* Test for '::' as a sanity check. */ | |
19912 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
19913 | && actual_name[actual_name_len |
19914 | - die_name_len - 1] == ':') | |
224c3ddb SM |
19915 | name = (char *) obstack_copy0 ( |
19916 | &cu->objfile->per_bfd->storage_obstack, | |
19917 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
19918 | } |
19919 | } | |
19920 | xfree (actual_name); | |
19921 | return name; | |
19922 | } | |
19923 | } | |
19924 | } | |
19925 | ||
19926 | return NULL; | |
19927 | } | |
19928 | ||
96408a79 SA |
19929 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
19930 | prefix part in such case. See | |
19931 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19932 | ||
a121b7c1 | 19933 | static const char * |
96408a79 SA |
19934 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
19935 | { | |
19936 | struct attribute *attr; | |
e6a959d6 | 19937 | const char *base; |
96408a79 SA |
19938 | |
19939 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
19940 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
19941 | return NULL; | |
19942 | ||
7d45c7c3 | 19943 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
19944 | return NULL; |
19945 | ||
73b9be8b | 19946 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
19947 | if (attr == NULL || DW_STRING (attr) == NULL) |
19948 | return NULL; | |
19949 | ||
19950 | /* dwarf2_name had to be already called. */ | |
19951 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
19952 | ||
19953 | /* Strip the base name, keep any leading namespaces/classes. */ | |
19954 | base = strrchr (DW_STRING (attr), ':'); | |
19955 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
19956 | return ""; | |
19957 | ||
224c3ddb SM |
19958 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
19959 | DW_STRING (attr), | |
19960 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
19961 | } |
19962 | ||
fdde2d81 | 19963 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 19964 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 19965 | |
0114d602 DJ |
19966 | For example, if we're within the method foo() in the following |
19967 | code: | |
19968 | ||
19969 | namespace N { | |
19970 | class C { | |
19971 | void foo () { | |
19972 | } | |
19973 | }; | |
19974 | } | |
19975 | ||
19976 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 19977 | |
0d5cff50 | 19978 | static const char * |
e142c38c | 19979 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 19980 | { |
0114d602 DJ |
19981 | struct die_info *parent, *spec_die; |
19982 | struct dwarf2_cu *spec_cu; | |
19983 | struct type *parent_type; | |
a121b7c1 | 19984 | const char *retval; |
63d06c5c | 19985 | |
9c37b5ae | 19986 | if (cu->language != language_cplus |
c44af4eb TT |
19987 | && cu->language != language_fortran && cu->language != language_d |
19988 | && cu->language != language_rust) | |
0114d602 DJ |
19989 | return ""; |
19990 | ||
96408a79 SA |
19991 | retval = anonymous_struct_prefix (die, cu); |
19992 | if (retval) | |
19993 | return retval; | |
19994 | ||
0114d602 DJ |
19995 | /* We have to be careful in the presence of DW_AT_specification. |
19996 | For example, with GCC 3.4, given the code | |
19997 | ||
19998 | namespace N { | |
19999 | void foo() { | |
20000 | // Definition of N::foo. | |
20001 | } | |
20002 | } | |
20003 | ||
20004 | then we'll have a tree of DIEs like this: | |
20005 | ||
20006 | 1: DW_TAG_compile_unit | |
20007 | 2: DW_TAG_namespace // N | |
20008 | 3: DW_TAG_subprogram // declaration of N::foo | |
20009 | 4: DW_TAG_subprogram // definition of N::foo | |
20010 | DW_AT_specification // refers to die #3 | |
20011 | ||
20012 | Thus, when processing die #4, we have to pretend that we're in | |
20013 | the context of its DW_AT_specification, namely the contex of die | |
20014 | #3. */ | |
20015 | spec_cu = cu; | |
20016 | spec_die = die_specification (die, &spec_cu); | |
20017 | if (spec_die == NULL) | |
20018 | parent = die->parent; | |
20019 | else | |
63d06c5c | 20020 | { |
0114d602 DJ |
20021 | parent = spec_die->parent; |
20022 | cu = spec_cu; | |
63d06c5c | 20023 | } |
0114d602 DJ |
20024 | |
20025 | if (parent == NULL) | |
20026 | return ""; | |
98bfdba5 PA |
20027 | else if (parent->building_fullname) |
20028 | { | |
20029 | const char *name; | |
20030 | const char *parent_name; | |
20031 | ||
20032 | /* It has been seen on RealView 2.2 built binaries, | |
20033 | DW_TAG_template_type_param types actually _defined_ as | |
20034 | children of the parent class: | |
20035 | ||
20036 | enum E {}; | |
20037 | template class <class Enum> Class{}; | |
20038 | Class<enum E> class_e; | |
20039 | ||
20040 | 1: DW_TAG_class_type (Class) | |
20041 | 2: DW_TAG_enumeration_type (E) | |
20042 | 3: DW_TAG_enumerator (enum1:0) | |
20043 | 3: DW_TAG_enumerator (enum2:1) | |
20044 | ... | |
20045 | 2: DW_TAG_template_type_param | |
20046 | DW_AT_type DW_FORM_ref_udata (E) | |
20047 | ||
20048 | Besides being broken debug info, it can put GDB into an | |
20049 | infinite loop. Consider: | |
20050 | ||
20051 | When we're building the full name for Class<E>, we'll start | |
20052 | at Class, and go look over its template type parameters, | |
20053 | finding E. We'll then try to build the full name of E, and | |
20054 | reach here. We're now trying to build the full name of E, | |
20055 | and look over the parent DIE for containing scope. In the | |
20056 | broken case, if we followed the parent DIE of E, we'd again | |
20057 | find Class, and once again go look at its template type | |
20058 | arguments, etc., etc. Simply don't consider such parent die | |
20059 | as source-level parent of this die (it can't be, the language | |
20060 | doesn't allow it), and break the loop here. */ | |
20061 | name = dwarf2_name (die, cu); | |
20062 | parent_name = dwarf2_name (parent, cu); | |
20063 | complaint (&symfile_complaints, | |
20064 | _("template param type '%s' defined within parent '%s'"), | |
20065 | name ? name : "<unknown>", | |
20066 | parent_name ? parent_name : "<unknown>"); | |
20067 | return ""; | |
20068 | } | |
63d06c5c | 20069 | else |
0114d602 DJ |
20070 | switch (parent->tag) |
20071 | { | |
63d06c5c | 20072 | case DW_TAG_namespace: |
0114d602 | 20073 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20074 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20075 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20076 | Work around this problem here. */ | |
20077 | if (cu->language == language_cplus | |
20078 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
20079 | return ""; | |
0114d602 DJ |
20080 | /* We give a name to even anonymous namespaces. */ |
20081 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 20082 | case DW_TAG_class_type: |
680b30c7 | 20083 | case DW_TAG_interface_type: |
63d06c5c | 20084 | case DW_TAG_structure_type: |
0114d602 | 20085 | case DW_TAG_union_type: |
f55ee35c | 20086 | case DW_TAG_module: |
0114d602 DJ |
20087 | parent_type = read_type_die (parent, cu); |
20088 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20089 | return TYPE_TAG_NAME (parent_type); | |
20090 | else | |
20091 | /* An anonymous structure is only allowed non-static data | |
20092 | members; no typedefs, no member functions, et cetera. | |
20093 | So it does not need a prefix. */ | |
20094 | return ""; | |
abc72ce4 | 20095 | case DW_TAG_compile_unit: |
95554aad | 20096 | case DW_TAG_partial_unit: |
abc72ce4 DE |
20097 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
20098 | if (cu->language == language_cplus | |
8b70b953 | 20099 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
20100 | && die->child != NULL |
20101 | && (die->tag == DW_TAG_class_type | |
20102 | || die->tag == DW_TAG_structure_type | |
20103 | || die->tag == DW_TAG_union_type)) | |
20104 | { | |
20105 | char *name = guess_full_die_structure_name (die, cu); | |
20106 | if (name != NULL) | |
20107 | return name; | |
20108 | } | |
20109 | return ""; | |
3d567982 TT |
20110 | case DW_TAG_enumeration_type: |
20111 | parent_type = read_type_die (parent, cu); | |
20112 | if (TYPE_DECLARED_CLASS (parent_type)) | |
20113 | { | |
20114 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20115 | return TYPE_TAG_NAME (parent_type); | |
20116 | return ""; | |
20117 | } | |
20118 | /* Fall through. */ | |
63d06c5c | 20119 | default: |
8176b9b8 | 20120 | return determine_prefix (parent, cu); |
63d06c5c | 20121 | } |
63d06c5c DC |
20122 | } |
20123 | ||
3e43a32a MS |
20124 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
20125 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
20126 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
20127 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
20128 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 20129 | |
f55ee35c | 20130 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
20131 | |
20132 | static char * | |
f55ee35c JK |
20133 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
20134 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 20135 | { |
f55ee35c | 20136 | const char *lead = ""; |
5c315b68 | 20137 | const char *sep; |
63d06c5c | 20138 | |
3e43a32a MS |
20139 | if (suffix == NULL || suffix[0] == '\0' |
20140 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 20141 | sep = ""; |
45280282 IB |
20142 | else if (cu->language == language_d) |
20143 | { | |
20144 | /* For D, the 'main' function could be defined in any module, but it | |
20145 | should never be prefixed. */ | |
20146 | if (strcmp (suffix, "D main") == 0) | |
20147 | { | |
20148 | prefix = ""; | |
20149 | sep = ""; | |
20150 | } | |
20151 | else | |
20152 | sep = "."; | |
20153 | } | |
f55ee35c JK |
20154 | else if (cu->language == language_fortran && physname) |
20155 | { | |
20156 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
20157 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
20158 | ||
20159 | lead = "__"; | |
20160 | sep = "_MOD_"; | |
20161 | } | |
987504bb JJ |
20162 | else |
20163 | sep = "::"; | |
63d06c5c | 20164 | |
6dd47d34 DE |
20165 | if (prefix == NULL) |
20166 | prefix = ""; | |
20167 | if (suffix == NULL) | |
20168 | suffix = ""; | |
20169 | ||
987504bb JJ |
20170 | if (obs == NULL) |
20171 | { | |
3e43a32a | 20172 | char *retval |
224c3ddb SM |
20173 | = ((char *) |
20174 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 20175 | |
f55ee35c JK |
20176 | strcpy (retval, lead); |
20177 | strcat (retval, prefix); | |
6dd47d34 DE |
20178 | strcat (retval, sep); |
20179 | strcat (retval, suffix); | |
63d06c5c DC |
20180 | return retval; |
20181 | } | |
987504bb JJ |
20182 | else |
20183 | { | |
20184 | /* We have an obstack. */ | |
f55ee35c | 20185 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 20186 | } |
63d06c5c DC |
20187 | } |
20188 | ||
c906108c SS |
20189 | /* Return sibling of die, NULL if no sibling. */ |
20190 | ||
f9aca02d | 20191 | static struct die_info * |
fba45db2 | 20192 | sibling_die (struct die_info *die) |
c906108c | 20193 | { |
639d11d3 | 20194 | return die->sibling; |
c906108c SS |
20195 | } |
20196 | ||
71c25dea TT |
20197 | /* Get name of a die, return NULL if not found. */ |
20198 | ||
15d034d0 TT |
20199 | static const char * |
20200 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
20201 | struct obstack *obstack) |
20202 | { | |
20203 | if (name && cu->language == language_cplus) | |
20204 | { | |
2f408ecb | 20205 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 20206 | |
2f408ecb | 20207 | if (!canon_name.empty ()) |
71c25dea | 20208 | { |
2f408ecb PA |
20209 | if (canon_name != name) |
20210 | name = (const char *) obstack_copy0 (obstack, | |
20211 | canon_name.c_str (), | |
20212 | canon_name.length ()); | |
71c25dea TT |
20213 | } |
20214 | } | |
20215 | ||
20216 | return name; | |
c906108c SS |
20217 | } |
20218 | ||
96553a0c DE |
20219 | /* Get name of a die, return NULL if not found. |
20220 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 20221 | |
15d034d0 | 20222 | static const char * |
e142c38c | 20223 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
20224 | { |
20225 | struct attribute *attr; | |
20226 | ||
e142c38c | 20227 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 20228 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 20229 | && die->tag != DW_TAG_namespace |
53832f31 TT |
20230 | && die->tag != DW_TAG_class_type |
20231 | && die->tag != DW_TAG_interface_type | |
20232 | && die->tag != DW_TAG_structure_type | |
20233 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
20234 | return NULL; |
20235 | ||
20236 | switch (die->tag) | |
20237 | { | |
20238 | case DW_TAG_compile_unit: | |
95554aad | 20239 | case DW_TAG_partial_unit: |
71c25dea TT |
20240 | /* Compilation units have a DW_AT_name that is a filename, not |
20241 | a source language identifier. */ | |
20242 | case DW_TAG_enumeration_type: | |
20243 | case DW_TAG_enumerator: | |
20244 | /* These tags always have simple identifiers already; no need | |
20245 | to canonicalize them. */ | |
20246 | return DW_STRING (attr); | |
907af001 | 20247 | |
96553a0c DE |
20248 | case DW_TAG_namespace: |
20249 | if (attr != NULL && DW_STRING (attr) != NULL) | |
20250 | return DW_STRING (attr); | |
20251 | return CP_ANONYMOUS_NAMESPACE_STR; | |
20252 | ||
907af001 UW |
20253 | case DW_TAG_class_type: |
20254 | case DW_TAG_interface_type: | |
20255 | case DW_TAG_structure_type: | |
20256 | case DW_TAG_union_type: | |
20257 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
20258 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
20259 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
20260 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 20261 | if (attr && DW_STRING (attr) |
61012eef GB |
20262 | && (startswith (DW_STRING (attr), "._") |
20263 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 20264 | return NULL; |
53832f31 TT |
20265 | |
20266 | /* GCC might emit a nameless typedef that has a linkage name. See | |
20267 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20268 | if (!attr || DW_STRING (attr) == NULL) | |
20269 | { | |
df5c6c50 | 20270 | char *demangled = NULL; |
53832f31 | 20271 | |
73b9be8b | 20272 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
20273 | if (attr == NULL || DW_STRING (attr) == NULL) |
20274 | return NULL; | |
20275 | ||
df5c6c50 JK |
20276 | /* Avoid demangling DW_STRING (attr) the second time on a second |
20277 | call for the same DIE. */ | |
20278 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 20279 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
20280 | |
20281 | if (demangled) | |
20282 | { | |
e6a959d6 | 20283 | const char *base; |
96408a79 | 20284 | |
53832f31 | 20285 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 20286 | DW_STRING (attr) |
224c3ddb SM |
20287 | = ((const char *) |
20288 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
20289 | demangled, strlen (demangled))); | |
53832f31 TT |
20290 | DW_STRING_IS_CANONICAL (attr) = 1; |
20291 | xfree (demangled); | |
96408a79 SA |
20292 | |
20293 | /* Strip any leading namespaces/classes, keep only the base name. | |
20294 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
20295 | base = strrchr (DW_STRING (attr), ':'); | |
20296 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
20297 | return &base[1]; | |
20298 | else | |
20299 | return DW_STRING (attr); | |
53832f31 TT |
20300 | } |
20301 | } | |
907af001 UW |
20302 | break; |
20303 | ||
71c25dea | 20304 | default: |
907af001 UW |
20305 | break; |
20306 | } | |
20307 | ||
20308 | if (!DW_STRING_IS_CANONICAL (attr)) | |
20309 | { | |
20310 | DW_STRING (attr) | |
20311 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 20312 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 20313 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 20314 | } |
907af001 | 20315 | return DW_STRING (attr); |
9219021c DC |
20316 | } |
20317 | ||
20318 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
20319 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
20320 | containing the return value on output. */ | |
9219021c DC |
20321 | |
20322 | static struct die_info * | |
f2f0e013 | 20323 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
20324 | { |
20325 | struct attribute *attr; | |
9219021c | 20326 | |
f2f0e013 | 20327 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
20328 | if (attr == NULL) |
20329 | return NULL; | |
20330 | ||
f2f0e013 | 20331 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
20332 | } |
20333 | ||
c906108c SS |
20334 | /* Convert a DIE tag into its string name. */ |
20335 | ||
f39c6ffd | 20336 | static const char * |
aa1ee363 | 20337 | dwarf_tag_name (unsigned tag) |
c906108c | 20338 | { |
f39c6ffd TT |
20339 | const char *name = get_DW_TAG_name (tag); |
20340 | ||
20341 | if (name == NULL) | |
20342 | return "DW_TAG_<unknown>"; | |
20343 | ||
20344 | return name; | |
c906108c SS |
20345 | } |
20346 | ||
20347 | /* Convert a DWARF attribute code into its string name. */ | |
20348 | ||
f39c6ffd | 20349 | static const char * |
aa1ee363 | 20350 | dwarf_attr_name (unsigned attr) |
c906108c | 20351 | { |
f39c6ffd TT |
20352 | const char *name; |
20353 | ||
c764a876 | 20354 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
20355 | if (attr == DW_AT_MIPS_fde) |
20356 | return "DW_AT_MIPS_fde"; | |
20357 | #else | |
20358 | if (attr == DW_AT_HP_block_index) | |
20359 | return "DW_AT_HP_block_index"; | |
c764a876 | 20360 | #endif |
f39c6ffd TT |
20361 | |
20362 | name = get_DW_AT_name (attr); | |
20363 | ||
20364 | if (name == NULL) | |
20365 | return "DW_AT_<unknown>"; | |
20366 | ||
20367 | return name; | |
c906108c SS |
20368 | } |
20369 | ||
20370 | /* Convert a DWARF value form code into its string name. */ | |
20371 | ||
f39c6ffd | 20372 | static const char * |
aa1ee363 | 20373 | dwarf_form_name (unsigned form) |
c906108c | 20374 | { |
f39c6ffd TT |
20375 | const char *name = get_DW_FORM_name (form); |
20376 | ||
20377 | if (name == NULL) | |
20378 | return "DW_FORM_<unknown>"; | |
20379 | ||
20380 | return name; | |
c906108c SS |
20381 | } |
20382 | ||
a121b7c1 | 20383 | static const char * |
fba45db2 | 20384 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
20385 | { |
20386 | if (mybool) | |
20387 | return "TRUE"; | |
20388 | else | |
20389 | return "FALSE"; | |
20390 | } | |
20391 | ||
20392 | /* Convert a DWARF type code into its string name. */ | |
20393 | ||
f39c6ffd | 20394 | static const char * |
aa1ee363 | 20395 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 20396 | { |
f39c6ffd | 20397 | const char *name = get_DW_ATE_name (enc); |
c906108c | 20398 | |
f39c6ffd TT |
20399 | if (name == NULL) |
20400 | return "DW_ATE_<unknown>"; | |
c906108c | 20401 | |
f39c6ffd | 20402 | return name; |
c906108c | 20403 | } |
c906108c | 20404 | |
f9aca02d | 20405 | static void |
d97bc12b | 20406 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
20407 | { |
20408 | unsigned int i; | |
20409 | ||
d97bc12b DE |
20410 | print_spaces (indent, f); |
20411 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
20412 | dwarf_tag_name (die->tag), die->abbrev, |
20413 | to_underlying (die->sect_off)); | |
d97bc12b DE |
20414 | |
20415 | if (die->parent != NULL) | |
20416 | { | |
20417 | print_spaces (indent, f); | |
20418 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 20419 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
20420 | } |
20421 | ||
20422 | print_spaces (indent, f); | |
20423 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 20424 | dwarf_bool_name (die->child != NULL)); |
c906108c | 20425 | |
d97bc12b DE |
20426 | print_spaces (indent, f); |
20427 | fprintf_unfiltered (f, " attributes:\n"); | |
20428 | ||
c906108c SS |
20429 | for (i = 0; i < die->num_attrs; ++i) |
20430 | { | |
d97bc12b DE |
20431 | print_spaces (indent, f); |
20432 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
20433 | dwarf_attr_name (die->attrs[i].name), |
20434 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 20435 | |
c906108c SS |
20436 | switch (die->attrs[i].form) |
20437 | { | |
c906108c | 20438 | case DW_FORM_addr: |
3019eac3 | 20439 | case DW_FORM_GNU_addr_index: |
d97bc12b | 20440 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 20441 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
20442 | break; |
20443 | case DW_FORM_block2: | |
20444 | case DW_FORM_block4: | |
20445 | case DW_FORM_block: | |
20446 | case DW_FORM_block1: | |
56eb65bd SP |
20447 | fprintf_unfiltered (f, "block: size %s", |
20448 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 20449 | break; |
2dc7f7b3 | 20450 | case DW_FORM_exprloc: |
56eb65bd SP |
20451 | fprintf_unfiltered (f, "expression: size %s", |
20452 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 20453 | break; |
0224619f JK |
20454 | case DW_FORM_data16: |
20455 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
20456 | break; | |
4568ecf9 DE |
20457 | case DW_FORM_ref_addr: |
20458 | fprintf_unfiltered (f, "ref address: "); | |
20459 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
20460 | break; | |
36586728 TT |
20461 | case DW_FORM_GNU_ref_alt: |
20462 | fprintf_unfiltered (f, "alt ref address: "); | |
20463 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
20464 | break; | |
10b3939b DJ |
20465 | case DW_FORM_ref1: |
20466 | case DW_FORM_ref2: | |
20467 | case DW_FORM_ref4: | |
4568ecf9 DE |
20468 | case DW_FORM_ref8: |
20469 | case DW_FORM_ref_udata: | |
d97bc12b | 20470 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 20471 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 20472 | break; |
c906108c SS |
20473 | case DW_FORM_data1: |
20474 | case DW_FORM_data2: | |
20475 | case DW_FORM_data4: | |
ce5d95e1 | 20476 | case DW_FORM_data8: |
c906108c SS |
20477 | case DW_FORM_udata: |
20478 | case DW_FORM_sdata: | |
43bbcdc2 PH |
20479 | fprintf_unfiltered (f, "constant: %s", |
20480 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 20481 | break; |
2dc7f7b3 TT |
20482 | case DW_FORM_sec_offset: |
20483 | fprintf_unfiltered (f, "section offset: %s", | |
20484 | pulongest (DW_UNSND (&die->attrs[i]))); | |
20485 | break; | |
55f1336d | 20486 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
20487 | fprintf_unfiltered (f, "signature: %s", |
20488 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 20489 | break; |
c906108c | 20490 | case DW_FORM_string: |
4bdf3d34 | 20491 | case DW_FORM_strp: |
43988095 | 20492 | case DW_FORM_line_strp: |
3019eac3 | 20493 | case DW_FORM_GNU_str_index: |
36586728 | 20494 | case DW_FORM_GNU_strp_alt: |
8285870a | 20495 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 20496 | DW_STRING (&die->attrs[i]) |
8285870a JK |
20497 | ? DW_STRING (&die->attrs[i]) : "", |
20498 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
20499 | break; |
20500 | case DW_FORM_flag: | |
20501 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 20502 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 20503 | else |
d97bc12b | 20504 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 20505 | break; |
2dc7f7b3 TT |
20506 | case DW_FORM_flag_present: |
20507 | fprintf_unfiltered (f, "flag: TRUE"); | |
20508 | break; | |
a8329558 | 20509 | case DW_FORM_indirect: |
0963b4bd MS |
20510 | /* The reader will have reduced the indirect form to |
20511 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
20512 | fprintf_unfiltered (f, |
20513 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 20514 | break; |
663c44ac JK |
20515 | case DW_FORM_implicit_const: |
20516 | fprintf_unfiltered (f, "constant: %s", | |
20517 | plongest (DW_SND (&die->attrs[i]))); | |
20518 | break; | |
c906108c | 20519 | default: |
d97bc12b | 20520 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 20521 | die->attrs[i].form); |
d97bc12b | 20522 | break; |
c906108c | 20523 | } |
d97bc12b | 20524 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
20525 | } |
20526 | } | |
20527 | ||
f9aca02d | 20528 | static void |
d97bc12b | 20529 | dump_die_for_error (struct die_info *die) |
c906108c | 20530 | { |
d97bc12b DE |
20531 | dump_die_shallow (gdb_stderr, 0, die); |
20532 | } | |
20533 | ||
20534 | static void | |
20535 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
20536 | { | |
20537 | int indent = level * 4; | |
20538 | ||
20539 | gdb_assert (die != NULL); | |
20540 | ||
20541 | if (level >= max_level) | |
20542 | return; | |
20543 | ||
20544 | dump_die_shallow (f, indent, die); | |
20545 | ||
20546 | if (die->child != NULL) | |
c906108c | 20547 | { |
d97bc12b DE |
20548 | print_spaces (indent, f); |
20549 | fprintf_unfiltered (f, " Children:"); | |
20550 | if (level + 1 < max_level) | |
20551 | { | |
20552 | fprintf_unfiltered (f, "\n"); | |
20553 | dump_die_1 (f, level + 1, max_level, die->child); | |
20554 | } | |
20555 | else | |
20556 | { | |
3e43a32a MS |
20557 | fprintf_unfiltered (f, |
20558 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
20559 | } |
20560 | } | |
20561 | ||
20562 | if (die->sibling != NULL && level > 0) | |
20563 | { | |
20564 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
20565 | } |
20566 | } | |
20567 | ||
d97bc12b DE |
20568 | /* This is called from the pdie macro in gdbinit.in. |
20569 | It's not static so gcc will keep a copy callable from gdb. */ | |
20570 | ||
20571 | void | |
20572 | dump_die (struct die_info *die, int max_level) | |
20573 | { | |
20574 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
20575 | } | |
20576 | ||
f9aca02d | 20577 | static void |
51545339 | 20578 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20579 | { |
51545339 | 20580 | void **slot; |
c906108c | 20581 | |
9c541725 PA |
20582 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
20583 | to_underlying (die->sect_off), | |
b64f50a1 | 20584 | INSERT); |
51545339 DJ |
20585 | |
20586 | *slot = die; | |
c906108c SS |
20587 | } |
20588 | ||
b64f50a1 JK |
20589 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
20590 | required kind. */ | |
20591 | ||
20592 | static sect_offset | |
ff39bb5e | 20593 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 20594 | { |
7771576e | 20595 | if (attr_form_is_ref (attr)) |
9c541725 | 20596 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
20597 | |
20598 | complaint (&symfile_complaints, | |
20599 | _("unsupported die ref attribute form: '%s'"), | |
20600 | dwarf_form_name (attr->form)); | |
9c541725 | 20601 | return {}; |
c906108c SS |
20602 | } |
20603 | ||
43bbcdc2 PH |
20604 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
20605 | * the value held by the attribute is not constant. */ | |
a02abb62 | 20606 | |
43bbcdc2 | 20607 | static LONGEST |
ff39bb5e | 20608 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 20609 | { |
663c44ac | 20610 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
20611 | return DW_SND (attr); |
20612 | else if (attr->form == DW_FORM_udata | |
20613 | || attr->form == DW_FORM_data1 | |
20614 | || attr->form == DW_FORM_data2 | |
20615 | || attr->form == DW_FORM_data4 | |
20616 | || attr->form == DW_FORM_data8) | |
20617 | return DW_UNSND (attr); | |
20618 | else | |
20619 | { | |
0224619f | 20620 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
20621 | complaint (&symfile_complaints, |
20622 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
20623 | dwarf_form_name (attr->form)); |
20624 | return default_value; | |
20625 | } | |
20626 | } | |
20627 | ||
348e048f DE |
20628 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
20629 | On entry *REF_CU is the CU of SRC_DIE. | |
20630 | On exit *REF_CU is the CU of the result. */ | |
20631 | ||
20632 | static struct die_info * | |
ff39bb5e | 20633 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
20634 | struct dwarf2_cu **ref_cu) |
20635 | { | |
20636 | struct die_info *die; | |
20637 | ||
7771576e | 20638 | if (attr_form_is_ref (attr)) |
348e048f | 20639 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 20640 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
20641 | die = follow_die_sig (src_die, attr, ref_cu); |
20642 | else | |
20643 | { | |
20644 | dump_die_for_error (src_die); | |
20645 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 20646 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
20647 | } |
20648 | ||
20649 | return die; | |
03dd20cc DJ |
20650 | } |
20651 | ||
5c631832 | 20652 | /* Follow reference OFFSET. |
673bfd45 DE |
20653 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
20654 | On exit *REF_CU is the CU of the result. | |
20655 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 20656 | |
f9aca02d | 20657 | static struct die_info * |
9c541725 | 20658 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 20659 | struct dwarf2_cu **ref_cu) |
c906108c | 20660 | { |
10b3939b | 20661 | struct die_info temp_die; |
f2f0e013 | 20662 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 20663 | |
348e048f DE |
20664 | gdb_assert (cu->per_cu != NULL); |
20665 | ||
98bfdba5 PA |
20666 | target_cu = cu; |
20667 | ||
3019eac3 | 20668 | if (cu->per_cu->is_debug_types) |
348e048f DE |
20669 | { |
20670 | /* .debug_types CUs cannot reference anything outside their CU. | |
20671 | If they need to, they have to reference a signatured type via | |
55f1336d | 20672 | DW_FORM_ref_sig8. */ |
9c541725 | 20673 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 20674 | return NULL; |
348e048f | 20675 | } |
36586728 | 20676 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 20677 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
20678 | { |
20679 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 20680 | |
9c541725 | 20681 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 20682 | cu->objfile); |
03dd20cc DJ |
20683 | |
20684 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
20685 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
20686 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 20687 | |
10b3939b DJ |
20688 | target_cu = per_cu->cu; |
20689 | } | |
98bfdba5 PA |
20690 | else if (cu->dies == NULL) |
20691 | { | |
20692 | /* We're loading full DIEs during partial symbol reading. */ | |
20693 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 20694 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 20695 | } |
c906108c | 20696 | |
f2f0e013 | 20697 | *ref_cu = target_cu; |
9c541725 | 20698 | temp_die.sect_off = sect_off; |
9a3c8263 | 20699 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
20700 | &temp_die, |
20701 | to_underlying (sect_off)); | |
5c631832 | 20702 | } |
10b3939b | 20703 | |
5c631832 JK |
20704 | /* Follow reference attribute ATTR of SRC_DIE. |
20705 | On entry *REF_CU is the CU of SRC_DIE. | |
20706 | On exit *REF_CU is the CU of the result. */ | |
20707 | ||
20708 | static struct die_info * | |
ff39bb5e | 20709 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
20710 | struct dwarf2_cu **ref_cu) |
20711 | { | |
9c541725 | 20712 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
20713 | struct dwarf2_cu *cu = *ref_cu; |
20714 | struct die_info *die; | |
20715 | ||
9c541725 | 20716 | die = follow_die_offset (sect_off, |
36586728 TT |
20717 | (attr->form == DW_FORM_GNU_ref_alt |
20718 | || cu->per_cu->is_dwz), | |
20719 | ref_cu); | |
5c631832 JK |
20720 | if (!die) |
20721 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
20722 | "at 0x%x [in module %s]"), | |
9c541725 | 20723 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 20724 | objfile_name (cu->objfile)); |
348e048f | 20725 | |
5c631832 JK |
20726 | return die; |
20727 | } | |
20728 | ||
9c541725 | 20729 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
20730 | Returned value is intended for DW_OP_call*. Returned |
20731 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
20732 | |
20733 | struct dwarf2_locexpr_baton | |
9c541725 | 20734 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
20735 | struct dwarf2_per_cu_data *per_cu, |
20736 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20737 | void *baton) | |
5c631832 | 20738 | { |
918dd910 | 20739 | struct dwarf2_cu *cu; |
5c631832 JK |
20740 | struct die_info *die; |
20741 | struct attribute *attr; | |
20742 | struct dwarf2_locexpr_baton retval; | |
20743 | ||
8cf6f0b1 TT |
20744 | dw2_setup (per_cu->objfile); |
20745 | ||
918dd910 JK |
20746 | if (per_cu->cu == NULL) |
20747 | load_cu (per_cu); | |
20748 | cu = per_cu->cu; | |
cc12ce38 DE |
20749 | if (cu == NULL) |
20750 | { | |
20751 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20752 | Instead just throw an error, not much else we can do. */ | |
20753 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 20754 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 20755 | } |
918dd910 | 20756 | |
9c541725 | 20757 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
20758 | if (!die) |
20759 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 20760 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
20761 | |
20762 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
20763 | if (!attr) | |
20764 | { | |
e103e986 JK |
20765 | /* DWARF: "If there is no such attribute, then there is no effect.". |
20766 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 20767 | |
e103e986 | 20768 | retval.data = NULL; |
5c631832 JK |
20769 | retval.size = 0; |
20770 | } | |
8cf6f0b1 TT |
20771 | else if (attr_form_is_section_offset (attr)) |
20772 | { | |
20773 | struct dwarf2_loclist_baton loclist_baton; | |
20774 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
20775 | size_t size; | |
20776 | ||
20777 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
20778 | ||
20779 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
20780 | &size, pc); | |
20781 | retval.size = size; | |
20782 | } | |
5c631832 JK |
20783 | else |
20784 | { | |
20785 | if (!attr_form_is_block (attr)) | |
20786 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
20787 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 20788 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
20789 | |
20790 | retval.data = DW_BLOCK (attr)->data; | |
20791 | retval.size = DW_BLOCK (attr)->size; | |
20792 | } | |
20793 | retval.per_cu = cu->per_cu; | |
918dd910 | 20794 | |
918dd910 JK |
20795 | age_cached_comp_units (); |
20796 | ||
5c631832 | 20797 | return retval; |
348e048f DE |
20798 | } |
20799 | ||
8b9737bf TT |
20800 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
20801 | offset. */ | |
20802 | ||
20803 | struct dwarf2_locexpr_baton | |
20804 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
20805 | struct dwarf2_per_cu_data *per_cu, | |
20806 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20807 | void *baton) | |
20808 | { | |
9c541725 | 20809 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 20810 | |
9c541725 | 20811 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
20812 | } |
20813 | ||
b6807d98 TT |
20814 | /* Write a constant of a given type as target-ordered bytes into |
20815 | OBSTACK. */ | |
20816 | ||
20817 | static const gdb_byte * | |
20818 | write_constant_as_bytes (struct obstack *obstack, | |
20819 | enum bfd_endian byte_order, | |
20820 | struct type *type, | |
20821 | ULONGEST value, | |
20822 | LONGEST *len) | |
20823 | { | |
20824 | gdb_byte *result; | |
20825 | ||
20826 | *len = TYPE_LENGTH (type); | |
224c3ddb | 20827 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20828 | store_unsigned_integer (result, *len, byte_order, value); |
20829 | ||
20830 | return result; | |
20831 | } | |
20832 | ||
20833 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
20834 | pointer to the constant bytes and set LEN to the length of the | |
20835 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
20836 | does not have a DW_AT_const_value, return NULL. */ | |
20837 | ||
20838 | const gdb_byte * | |
9c541725 | 20839 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
20840 | struct dwarf2_per_cu_data *per_cu, |
20841 | struct obstack *obstack, | |
20842 | LONGEST *len) | |
20843 | { | |
20844 | struct dwarf2_cu *cu; | |
20845 | struct die_info *die; | |
20846 | struct attribute *attr; | |
20847 | const gdb_byte *result = NULL; | |
20848 | struct type *type; | |
20849 | LONGEST value; | |
20850 | enum bfd_endian byte_order; | |
20851 | ||
20852 | dw2_setup (per_cu->objfile); | |
20853 | ||
20854 | if (per_cu->cu == NULL) | |
20855 | load_cu (per_cu); | |
20856 | cu = per_cu->cu; | |
cc12ce38 DE |
20857 | if (cu == NULL) |
20858 | { | |
20859 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20860 | Instead just throw an error, not much else we can do. */ | |
20861 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 20862 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 20863 | } |
b6807d98 | 20864 | |
9c541725 | 20865 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
20866 | if (!die) |
20867 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 20868 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
20869 | |
20870 | ||
20871 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
20872 | if (attr == NULL) | |
20873 | return NULL; | |
20874 | ||
20875 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
20876 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20877 | ||
20878 | switch (attr->form) | |
20879 | { | |
20880 | case DW_FORM_addr: | |
20881 | case DW_FORM_GNU_addr_index: | |
20882 | { | |
20883 | gdb_byte *tem; | |
20884 | ||
20885 | *len = cu->header.addr_size; | |
224c3ddb | 20886 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20887 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
20888 | result = tem; | |
20889 | } | |
20890 | break; | |
20891 | case DW_FORM_string: | |
20892 | case DW_FORM_strp: | |
20893 | case DW_FORM_GNU_str_index: | |
20894 | case DW_FORM_GNU_strp_alt: | |
20895 | /* DW_STRING is already allocated on the objfile obstack, point | |
20896 | directly to it. */ | |
20897 | result = (const gdb_byte *) DW_STRING (attr); | |
20898 | *len = strlen (DW_STRING (attr)); | |
20899 | break; | |
20900 | case DW_FORM_block1: | |
20901 | case DW_FORM_block2: | |
20902 | case DW_FORM_block4: | |
20903 | case DW_FORM_block: | |
20904 | case DW_FORM_exprloc: | |
0224619f | 20905 | case DW_FORM_data16: |
b6807d98 TT |
20906 | result = DW_BLOCK (attr)->data; |
20907 | *len = DW_BLOCK (attr)->size; | |
20908 | break; | |
20909 | ||
20910 | /* The DW_AT_const_value attributes are supposed to carry the | |
20911 | symbol's value "represented as it would be on the target | |
20912 | architecture." By the time we get here, it's already been | |
20913 | converted to host endianness, so we just need to sign- or | |
20914 | zero-extend it as appropriate. */ | |
20915 | case DW_FORM_data1: | |
20916 | type = die_type (die, cu); | |
20917 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
20918 | if (result == NULL) | |
20919 | result = write_constant_as_bytes (obstack, byte_order, | |
20920 | type, value, len); | |
20921 | break; | |
20922 | case DW_FORM_data2: | |
20923 | type = die_type (die, cu); | |
20924 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
20925 | if (result == NULL) | |
20926 | result = write_constant_as_bytes (obstack, byte_order, | |
20927 | type, value, len); | |
20928 | break; | |
20929 | case DW_FORM_data4: | |
20930 | type = die_type (die, cu); | |
20931 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
20932 | if (result == NULL) | |
20933 | result = write_constant_as_bytes (obstack, byte_order, | |
20934 | type, value, len); | |
20935 | break; | |
20936 | case DW_FORM_data8: | |
20937 | type = die_type (die, cu); | |
20938 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
20939 | if (result == NULL) | |
20940 | result = write_constant_as_bytes (obstack, byte_order, | |
20941 | type, value, len); | |
20942 | break; | |
20943 | ||
20944 | case DW_FORM_sdata: | |
663c44ac | 20945 | case DW_FORM_implicit_const: |
b6807d98 TT |
20946 | type = die_type (die, cu); |
20947 | result = write_constant_as_bytes (obstack, byte_order, | |
20948 | type, DW_SND (attr), len); | |
20949 | break; | |
20950 | ||
20951 | case DW_FORM_udata: | |
20952 | type = die_type (die, cu); | |
20953 | result = write_constant_as_bytes (obstack, byte_order, | |
20954 | type, DW_UNSND (attr), len); | |
20955 | break; | |
20956 | ||
20957 | default: | |
20958 | complaint (&symfile_complaints, | |
20959 | _("unsupported const value attribute form: '%s'"), | |
20960 | dwarf_form_name (attr->form)); | |
20961 | break; | |
20962 | } | |
20963 | ||
20964 | return result; | |
20965 | } | |
20966 | ||
7942e96e AA |
20967 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
20968 | valid type for this die is found. */ | |
20969 | ||
20970 | struct type * | |
9c541725 | 20971 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
20972 | struct dwarf2_per_cu_data *per_cu) |
20973 | { | |
20974 | struct dwarf2_cu *cu; | |
20975 | struct die_info *die; | |
20976 | ||
20977 | dw2_setup (per_cu->objfile); | |
20978 | ||
20979 | if (per_cu->cu == NULL) | |
20980 | load_cu (per_cu); | |
20981 | cu = per_cu->cu; | |
20982 | if (!cu) | |
20983 | return NULL; | |
20984 | ||
9c541725 | 20985 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
20986 | if (!die) |
20987 | return NULL; | |
20988 | ||
20989 | return die_type (die, cu); | |
20990 | } | |
20991 | ||
8a9b8146 TT |
20992 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
20993 | PER_CU. */ | |
20994 | ||
20995 | struct type * | |
b64f50a1 | 20996 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
20997 | struct dwarf2_per_cu_data *per_cu) |
20998 | { | |
8a9b8146 | 20999 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21000 | |
9c541725 | 21001 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21002 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21003 | } |
21004 | ||
ac9ec31b | 21005 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21006 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21007 | On exit *REF_CU is the CU of the result. |
21008 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21009 | |
21010 | static struct die_info * | |
ac9ec31b DE |
21011 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21012 | struct dwarf2_cu **ref_cu) | |
348e048f | 21013 | { |
348e048f | 21014 | struct die_info temp_die; |
348e048f DE |
21015 | struct dwarf2_cu *sig_cu; |
21016 | struct die_info *die; | |
21017 | ||
ac9ec31b DE |
21018 | /* While it might be nice to assert sig_type->type == NULL here, |
21019 | we can get here for DW_AT_imported_declaration where we need | |
21020 | the DIE not the type. */ | |
348e048f DE |
21021 | |
21022 | /* If necessary, add it to the queue and load its DIEs. */ | |
21023 | ||
95554aad | 21024 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21025 | read_signatured_type (sig_type); |
348e048f | 21026 | |
348e048f | 21027 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21028 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21029 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21030 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21031 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21032 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21033 | if (die) |
21034 | { | |
796a7ff8 DE |
21035 | /* For .gdb_index version 7 keep track of included TUs. |
21036 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21037 | if (dwarf2_per_objfile->index_table != NULL | |
21038 | && dwarf2_per_objfile->index_table->version <= 7) | |
21039 | { | |
21040 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21041 | (*ref_cu)->per_cu->imported_symtabs, | |
21042 | sig_cu->per_cu); | |
21043 | } | |
21044 | ||
348e048f DE |
21045 | *ref_cu = sig_cu; |
21046 | return die; | |
21047 | } | |
21048 | ||
ac9ec31b DE |
21049 | return NULL; |
21050 | } | |
21051 | ||
21052 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21053 | On entry *REF_CU is the CU of SRC_DIE. | |
21054 | On exit *REF_CU is the CU of the result. | |
21055 | The result is the DIE of the type. | |
21056 | If the referenced type cannot be found an error is thrown. */ | |
21057 | ||
21058 | static struct die_info * | |
ff39bb5e | 21059 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21060 | struct dwarf2_cu **ref_cu) |
21061 | { | |
21062 | ULONGEST signature = DW_SIGNATURE (attr); | |
21063 | struct signatured_type *sig_type; | |
21064 | struct die_info *die; | |
21065 | ||
21066 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21067 | ||
a2ce51a0 | 21068 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21069 | /* sig_type will be NULL if the signatured type is missing from |
21070 | the debug info. */ | |
21071 | if (sig_type == NULL) | |
21072 | { | |
21073 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21074 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21075 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21076 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21077 | } |
21078 | ||
21079 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
21080 | if (die == NULL) | |
21081 | { | |
21082 | dump_die_for_error (src_die); | |
21083 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21084 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21085 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21086 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21087 | } |
21088 | ||
21089 | return die; | |
21090 | } | |
21091 | ||
21092 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
21093 | reading in and processing the type unit if necessary. */ | |
21094 | ||
21095 | static struct type * | |
21096 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
21097 | struct dwarf2_cu *cu) | |
21098 | { | |
21099 | struct signatured_type *sig_type; | |
21100 | struct dwarf2_cu *type_cu; | |
21101 | struct die_info *type_die; | |
21102 | struct type *type; | |
21103 | ||
a2ce51a0 | 21104 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
21105 | /* sig_type will be NULL if the signatured type is missing from |
21106 | the debug info. */ | |
21107 | if (sig_type == NULL) | |
21108 | { | |
21109 | complaint (&symfile_complaints, | |
21110 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21111 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21112 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21113 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21114 | return build_error_marker_type (cu, die); |
21115 | } | |
21116 | ||
21117 | /* If we already know the type we're done. */ | |
21118 | if (sig_type->type != NULL) | |
21119 | return sig_type->type; | |
21120 | ||
21121 | type_cu = cu; | |
21122 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
21123 | if (type_die != NULL) | |
21124 | { | |
21125 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
21126 | is created. This is important, for example, because for c++ classes | |
21127 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
21128 | type = read_type_die (type_die, type_cu); | |
21129 | if (type == NULL) | |
21130 | { | |
21131 | complaint (&symfile_complaints, | |
21132 | _("Dwarf Error: Cannot build signatured type %s" | |
21133 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 21134 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21135 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21136 | type = build_error_marker_type (cu, die); |
21137 | } | |
21138 | } | |
21139 | else | |
21140 | { | |
21141 | complaint (&symfile_complaints, | |
21142 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21143 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21144 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21145 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21146 | type = build_error_marker_type (cu, die); |
21147 | } | |
21148 | sig_type->type = type; | |
21149 | ||
21150 | return type; | |
21151 | } | |
21152 | ||
21153 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
21154 | reading in and processing the type unit if necessary. */ | |
21155 | ||
21156 | static struct type * | |
ff39bb5e | 21157 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 21158 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
21159 | { |
21160 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 21161 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
21162 | { |
21163 | struct dwarf2_cu *type_cu = cu; | |
21164 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
21165 | ||
21166 | return read_type_die (type_die, type_cu); | |
21167 | } | |
21168 | else if (attr->form == DW_FORM_ref_sig8) | |
21169 | { | |
21170 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
21171 | } | |
21172 | else | |
21173 | { | |
21174 | complaint (&symfile_complaints, | |
21175 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
21176 | " at 0x%x [in module %s]"), | |
9c541725 | 21177 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 21178 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21179 | return build_error_marker_type (cu, die); |
21180 | } | |
348e048f DE |
21181 | } |
21182 | ||
e5fe5e75 | 21183 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
21184 | |
21185 | static void | |
e5fe5e75 | 21186 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 21187 | { |
52dc124a | 21188 | struct signatured_type *sig_type; |
348e048f | 21189 | |
f4dc4d17 DE |
21190 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
21191 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
21192 | ||
6721b2ec DE |
21193 | /* We have the per_cu, but we need the signatured_type. |
21194 | Fortunately this is an easy translation. */ | |
21195 | gdb_assert (per_cu->is_debug_types); | |
21196 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 21197 | |
6721b2ec | 21198 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21199 | |
52dc124a | 21200 | read_signatured_type (sig_type); |
348e048f | 21201 | |
6721b2ec | 21202 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
21203 | } |
21204 | ||
dee91e82 DE |
21205 | /* die_reader_func for read_signatured_type. |
21206 | This is identical to load_full_comp_unit_reader, | |
21207 | but is kept separate for now. */ | |
348e048f DE |
21208 | |
21209 | static void | |
dee91e82 | 21210 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 21211 | const gdb_byte *info_ptr, |
dee91e82 DE |
21212 | struct die_info *comp_unit_die, |
21213 | int has_children, | |
21214 | void *data) | |
348e048f | 21215 | { |
dee91e82 | 21216 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 21217 | |
dee91e82 DE |
21218 | gdb_assert (cu->die_hash == NULL); |
21219 | cu->die_hash = | |
21220 | htab_create_alloc_ex (cu->header.length / 12, | |
21221 | die_hash, | |
21222 | die_eq, | |
21223 | NULL, | |
21224 | &cu->comp_unit_obstack, | |
21225 | hashtab_obstack_allocate, | |
21226 | dummy_obstack_deallocate); | |
348e048f | 21227 | |
dee91e82 DE |
21228 | if (has_children) |
21229 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
21230 | &info_ptr, comp_unit_die); | |
21231 | cu->dies = comp_unit_die; | |
21232 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
21233 | |
21234 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 21235 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 21236 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
21237 | or we won't be able to build types correctly. |
21238 | Similarly, if we do not read the producer, we can not apply | |
21239 | producer-specific interpretation. */ | |
95554aad | 21240 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 21241 | } |
348e048f | 21242 | |
3019eac3 DE |
21243 | /* Read in a signatured type and build its CU and DIEs. |
21244 | If the type is a stub for the real type in a DWO file, | |
21245 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
21246 | |
21247 | static void | |
21248 | read_signatured_type (struct signatured_type *sig_type) | |
21249 | { | |
21250 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 21251 | |
3019eac3 | 21252 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 21253 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21254 | |
f4dc4d17 DE |
21255 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
21256 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 21257 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
21258 | } |
21259 | ||
c906108c SS |
21260 | /* Decode simple location descriptions. |
21261 | Given a pointer to a dwarf block that defines a location, compute | |
21262 | the location and return the value. | |
21263 | ||
4cecd739 DJ |
21264 | NOTE drow/2003-11-18: This function is called in two situations |
21265 | now: for the address of static or global variables (partial symbols | |
21266 | only) and for offsets into structures which are expected to be | |
21267 | (more or less) constant. The partial symbol case should go away, | |
21268 | and only the constant case should remain. That will let this | |
21269 | function complain more accurately. A few special modes are allowed | |
21270 | without complaint for global variables (for instance, global | |
21271 | register values and thread-local values). | |
c906108c SS |
21272 | |
21273 | A location description containing no operations indicates that the | |
4cecd739 | 21274 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
21275 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
21276 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
21277 | complaint. |
21278 | ||
21279 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
21280 | |
21281 | static CORE_ADDR | |
e7c27a73 | 21282 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 21283 | { |
e7c27a73 | 21284 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
21285 | size_t i; |
21286 | size_t size = blk->size; | |
d521ce57 | 21287 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
21288 | CORE_ADDR stack[64]; |
21289 | int stacki; | |
21290 | unsigned int bytes_read, unsnd; | |
21291 | gdb_byte op; | |
c906108c | 21292 | |
21ae7a4d JK |
21293 | i = 0; |
21294 | stacki = 0; | |
21295 | stack[stacki] = 0; | |
21296 | stack[++stacki] = 0; | |
21297 | ||
21298 | while (i < size) | |
21299 | { | |
21300 | op = data[i++]; | |
21301 | switch (op) | |
21302 | { | |
21303 | case DW_OP_lit0: | |
21304 | case DW_OP_lit1: | |
21305 | case DW_OP_lit2: | |
21306 | case DW_OP_lit3: | |
21307 | case DW_OP_lit4: | |
21308 | case DW_OP_lit5: | |
21309 | case DW_OP_lit6: | |
21310 | case DW_OP_lit7: | |
21311 | case DW_OP_lit8: | |
21312 | case DW_OP_lit9: | |
21313 | case DW_OP_lit10: | |
21314 | case DW_OP_lit11: | |
21315 | case DW_OP_lit12: | |
21316 | case DW_OP_lit13: | |
21317 | case DW_OP_lit14: | |
21318 | case DW_OP_lit15: | |
21319 | case DW_OP_lit16: | |
21320 | case DW_OP_lit17: | |
21321 | case DW_OP_lit18: | |
21322 | case DW_OP_lit19: | |
21323 | case DW_OP_lit20: | |
21324 | case DW_OP_lit21: | |
21325 | case DW_OP_lit22: | |
21326 | case DW_OP_lit23: | |
21327 | case DW_OP_lit24: | |
21328 | case DW_OP_lit25: | |
21329 | case DW_OP_lit26: | |
21330 | case DW_OP_lit27: | |
21331 | case DW_OP_lit28: | |
21332 | case DW_OP_lit29: | |
21333 | case DW_OP_lit30: | |
21334 | case DW_OP_lit31: | |
21335 | stack[++stacki] = op - DW_OP_lit0; | |
21336 | break; | |
f1bea926 | 21337 | |
21ae7a4d JK |
21338 | case DW_OP_reg0: |
21339 | case DW_OP_reg1: | |
21340 | case DW_OP_reg2: | |
21341 | case DW_OP_reg3: | |
21342 | case DW_OP_reg4: | |
21343 | case DW_OP_reg5: | |
21344 | case DW_OP_reg6: | |
21345 | case DW_OP_reg7: | |
21346 | case DW_OP_reg8: | |
21347 | case DW_OP_reg9: | |
21348 | case DW_OP_reg10: | |
21349 | case DW_OP_reg11: | |
21350 | case DW_OP_reg12: | |
21351 | case DW_OP_reg13: | |
21352 | case DW_OP_reg14: | |
21353 | case DW_OP_reg15: | |
21354 | case DW_OP_reg16: | |
21355 | case DW_OP_reg17: | |
21356 | case DW_OP_reg18: | |
21357 | case DW_OP_reg19: | |
21358 | case DW_OP_reg20: | |
21359 | case DW_OP_reg21: | |
21360 | case DW_OP_reg22: | |
21361 | case DW_OP_reg23: | |
21362 | case DW_OP_reg24: | |
21363 | case DW_OP_reg25: | |
21364 | case DW_OP_reg26: | |
21365 | case DW_OP_reg27: | |
21366 | case DW_OP_reg28: | |
21367 | case DW_OP_reg29: | |
21368 | case DW_OP_reg30: | |
21369 | case DW_OP_reg31: | |
21370 | stack[++stacki] = op - DW_OP_reg0; | |
21371 | if (i < size) | |
21372 | dwarf2_complex_location_expr_complaint (); | |
21373 | break; | |
c906108c | 21374 | |
21ae7a4d JK |
21375 | case DW_OP_regx: |
21376 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
21377 | i += bytes_read; | |
21378 | stack[++stacki] = unsnd; | |
21379 | if (i < size) | |
21380 | dwarf2_complex_location_expr_complaint (); | |
21381 | break; | |
c906108c | 21382 | |
21ae7a4d JK |
21383 | case DW_OP_addr: |
21384 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
21385 | cu, &bytes_read); | |
21386 | i += bytes_read; | |
21387 | break; | |
d53d4ac5 | 21388 | |
21ae7a4d JK |
21389 | case DW_OP_const1u: |
21390 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
21391 | i += 1; | |
21392 | break; | |
21393 | ||
21394 | case DW_OP_const1s: | |
21395 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
21396 | i += 1; | |
21397 | break; | |
21398 | ||
21399 | case DW_OP_const2u: | |
21400 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
21401 | i += 2; | |
21402 | break; | |
21403 | ||
21404 | case DW_OP_const2s: | |
21405 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
21406 | i += 2; | |
21407 | break; | |
d53d4ac5 | 21408 | |
21ae7a4d JK |
21409 | case DW_OP_const4u: |
21410 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
21411 | i += 4; | |
21412 | break; | |
21413 | ||
21414 | case DW_OP_const4s: | |
21415 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
21416 | i += 4; | |
21417 | break; | |
21418 | ||
585861ea JK |
21419 | case DW_OP_const8u: |
21420 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
21421 | i += 8; | |
21422 | break; | |
21423 | ||
21ae7a4d JK |
21424 | case DW_OP_constu: |
21425 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
21426 | &bytes_read); | |
21427 | i += bytes_read; | |
21428 | break; | |
21429 | ||
21430 | case DW_OP_consts: | |
21431 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
21432 | i += bytes_read; | |
21433 | break; | |
21434 | ||
21435 | case DW_OP_dup: | |
21436 | stack[stacki + 1] = stack[stacki]; | |
21437 | stacki++; | |
21438 | break; | |
21439 | ||
21440 | case DW_OP_plus: | |
21441 | stack[stacki - 1] += stack[stacki]; | |
21442 | stacki--; | |
21443 | break; | |
21444 | ||
21445 | case DW_OP_plus_uconst: | |
21446 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
21447 | &bytes_read); | |
21448 | i += bytes_read; | |
21449 | break; | |
21450 | ||
21451 | case DW_OP_minus: | |
21452 | stack[stacki - 1] -= stack[stacki]; | |
21453 | stacki--; | |
21454 | break; | |
21455 | ||
21456 | case DW_OP_deref: | |
21457 | /* If we're not the last op, then we definitely can't encode | |
21458 | this using GDB's address_class enum. This is valid for partial | |
21459 | global symbols, although the variable's address will be bogus | |
21460 | in the psymtab. */ | |
21461 | if (i < size) | |
21462 | dwarf2_complex_location_expr_complaint (); | |
21463 | break; | |
21464 | ||
21465 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 21466 | case DW_OP_form_tls_address: |
21ae7a4d JK |
21467 | /* The top of the stack has the offset from the beginning |
21468 | of the thread control block at which the variable is located. */ | |
21469 | /* Nothing should follow this operator, so the top of stack would | |
21470 | be returned. */ | |
21471 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
21472 | address will be bogus in the psymtab. Make it always at least |
21473 | non-zero to not look as a variable garbage collected by linker | |
21474 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
21475 | if (i < size) |
21476 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 21477 | stack[stacki]++; |
21ae7a4d JK |
21478 | break; |
21479 | ||
21480 | case DW_OP_GNU_uninit: | |
21481 | break; | |
21482 | ||
3019eac3 | 21483 | case DW_OP_GNU_addr_index: |
49f6c839 | 21484 | case DW_OP_GNU_const_index: |
3019eac3 DE |
21485 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
21486 | &bytes_read); | |
21487 | i += bytes_read; | |
21488 | break; | |
21489 | ||
21ae7a4d JK |
21490 | default: |
21491 | { | |
f39c6ffd | 21492 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
21493 | |
21494 | if (name) | |
21495 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
21496 | name); | |
21497 | else | |
21498 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
21499 | op); | |
21500 | } | |
21501 | ||
21502 | return (stack[stacki]); | |
d53d4ac5 | 21503 | } |
3c6e0cb3 | 21504 | |
21ae7a4d JK |
21505 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
21506 | outside of the allocated space. Also enforce minimum>0. */ | |
21507 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
21508 | { | |
21509 | complaint (&symfile_complaints, | |
21510 | _("location description stack overflow")); | |
21511 | return 0; | |
21512 | } | |
21513 | ||
21514 | if (stacki <= 0) | |
21515 | { | |
21516 | complaint (&symfile_complaints, | |
21517 | _("location description stack underflow")); | |
21518 | return 0; | |
21519 | } | |
21520 | } | |
21521 | return (stack[stacki]); | |
c906108c SS |
21522 | } |
21523 | ||
21524 | /* memory allocation interface */ | |
21525 | ||
c906108c | 21526 | static struct dwarf_block * |
7b5a2f43 | 21527 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 21528 | { |
8d749320 | 21529 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
21530 | } |
21531 | ||
c906108c | 21532 | static struct die_info * |
b60c80d6 | 21533 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
21534 | { |
21535 | struct die_info *die; | |
b60c80d6 DJ |
21536 | size_t size = sizeof (struct die_info); |
21537 | ||
21538 | if (num_attrs > 1) | |
21539 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 21540 | |
b60c80d6 | 21541 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
21542 | memset (die, 0, sizeof (struct die_info)); |
21543 | return (die); | |
21544 | } | |
2e276125 JB |
21545 | |
21546 | \f | |
21547 | /* Macro support. */ | |
21548 | ||
233d95b5 JK |
21549 | /* Return file name relative to the compilation directory of file number I in |
21550 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 21551 | responsible for freeing it. */ |
233d95b5 | 21552 | |
2e276125 | 21553 | static char * |
233d95b5 | 21554 | file_file_name (int file, struct line_header *lh) |
2e276125 | 21555 | { |
6a83a1e6 EZ |
21556 | /* Is the file number a valid index into the line header's file name |
21557 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 21558 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 21559 | { |
8c43009f | 21560 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 21561 | |
8c43009f PA |
21562 | if (!IS_ABSOLUTE_PATH (fe.name)) |
21563 | { | |
21564 | const char *dir = fe.include_dir (lh); | |
21565 | if (dir != NULL) | |
21566 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
21567 | } | |
21568 | return xstrdup (fe.name); | |
6a83a1e6 | 21569 | } |
2e276125 JB |
21570 | else |
21571 | { | |
6a83a1e6 EZ |
21572 | /* The compiler produced a bogus file number. We can at least |
21573 | record the macro definitions made in the file, even if we | |
21574 | won't be able to find the file by name. */ | |
21575 | char fake_name[80]; | |
9a619af0 | 21576 | |
8c042590 PM |
21577 | xsnprintf (fake_name, sizeof (fake_name), |
21578 | "<bad macro file number %d>", file); | |
2e276125 | 21579 | |
6e70227d | 21580 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
21581 | _("bad file number in macro information (%d)"), |
21582 | file); | |
2e276125 | 21583 | |
6a83a1e6 | 21584 | return xstrdup (fake_name); |
2e276125 JB |
21585 | } |
21586 | } | |
21587 | ||
233d95b5 JK |
21588 | /* Return the full name of file number I in *LH's file name table. |
21589 | Use COMP_DIR as the name of the current directory of the | |
21590 | compilation. The result is allocated using xmalloc; the caller is | |
21591 | responsible for freeing it. */ | |
21592 | static char * | |
21593 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
21594 | { | |
21595 | /* Is the file number a valid index into the line header's file name | |
21596 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 21597 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
21598 | { |
21599 | char *relative = file_file_name (file, lh); | |
21600 | ||
21601 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
21602 | return relative; | |
b36cec19 PA |
21603 | return reconcat (relative, comp_dir, SLASH_STRING, |
21604 | relative, (char *) NULL); | |
233d95b5 JK |
21605 | } |
21606 | else | |
21607 | return file_file_name (file, lh); | |
21608 | } | |
21609 | ||
2e276125 JB |
21610 | |
21611 | static struct macro_source_file * | |
21612 | macro_start_file (int file, int line, | |
21613 | struct macro_source_file *current_file, | |
43f3e411 | 21614 | struct line_header *lh) |
2e276125 | 21615 | { |
233d95b5 JK |
21616 | /* File name relative to the compilation directory of this source file. */ |
21617 | char *file_name = file_file_name (file, lh); | |
2e276125 | 21618 | |
2e276125 | 21619 | if (! current_file) |
abc9d0dc | 21620 | { |
fc474241 DE |
21621 | /* Note: We don't create a macro table for this compilation unit |
21622 | at all until we actually get a filename. */ | |
43f3e411 | 21623 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 21624 | |
abc9d0dc TT |
21625 | /* If we have no current file, then this must be the start_file |
21626 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
21627 | current_file = macro_set_main (macro_table, file_name); |
21628 | macro_define_special (macro_table); | |
abc9d0dc | 21629 | } |
2e276125 | 21630 | else |
233d95b5 | 21631 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 21632 | |
233d95b5 | 21633 | xfree (file_name); |
6e70227d | 21634 | |
2e276125 JB |
21635 | return current_file; |
21636 | } | |
21637 | ||
2e276125 JB |
21638 | static const char * |
21639 | consume_improper_spaces (const char *p, const char *body) | |
21640 | { | |
21641 | if (*p == ' ') | |
21642 | { | |
4d3c2250 | 21643 | complaint (&symfile_complaints, |
3e43a32a MS |
21644 | _("macro definition contains spaces " |
21645 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 21646 | body); |
2e276125 JB |
21647 | |
21648 | while (*p == ' ') | |
21649 | p++; | |
21650 | } | |
21651 | ||
21652 | return p; | |
21653 | } | |
21654 | ||
21655 | ||
21656 | static void | |
21657 | parse_macro_definition (struct macro_source_file *file, int line, | |
21658 | const char *body) | |
21659 | { | |
21660 | const char *p; | |
21661 | ||
21662 | /* The body string takes one of two forms. For object-like macro | |
21663 | definitions, it should be: | |
21664 | ||
21665 | <macro name> " " <definition> | |
21666 | ||
21667 | For function-like macro definitions, it should be: | |
21668 | ||
21669 | <macro name> "() " <definition> | |
21670 | or | |
21671 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
21672 | ||
21673 | Spaces may appear only where explicitly indicated, and in the | |
21674 | <definition>. | |
21675 | ||
21676 | The Dwarf 2 spec says that an object-like macro's name is always | |
21677 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 21678 | the space when the macro's definition is the empty string. |
2e276125 JB |
21679 | |
21680 | The Dwarf 2 spec says that there should be no spaces between the | |
21681 | formal arguments in a function-like macro's formal argument list, | |
21682 | but versions of GCC around March 2002 include spaces after the | |
21683 | commas. */ | |
21684 | ||
21685 | ||
21686 | /* Find the extent of the macro name. The macro name is terminated | |
21687 | by either a space or null character (for an object-like macro) or | |
21688 | an opening paren (for a function-like macro). */ | |
21689 | for (p = body; *p; p++) | |
21690 | if (*p == ' ' || *p == '(') | |
21691 | break; | |
21692 | ||
21693 | if (*p == ' ' || *p == '\0') | |
21694 | { | |
21695 | /* It's an object-like macro. */ | |
21696 | int name_len = p - body; | |
3f8a7804 | 21697 | char *name = savestring (body, name_len); |
2e276125 JB |
21698 | const char *replacement; |
21699 | ||
21700 | if (*p == ' ') | |
21701 | replacement = body + name_len + 1; | |
21702 | else | |
21703 | { | |
4d3c2250 | 21704 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21705 | replacement = body + name_len; |
21706 | } | |
6e70227d | 21707 | |
2e276125 JB |
21708 | macro_define_object (file, line, name, replacement); |
21709 | ||
21710 | xfree (name); | |
21711 | } | |
21712 | else if (*p == '(') | |
21713 | { | |
21714 | /* It's a function-like macro. */ | |
3f8a7804 | 21715 | char *name = savestring (body, p - body); |
2e276125 JB |
21716 | int argc = 0; |
21717 | int argv_size = 1; | |
8d749320 | 21718 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
21719 | |
21720 | p++; | |
21721 | ||
21722 | p = consume_improper_spaces (p, body); | |
21723 | ||
21724 | /* Parse the formal argument list. */ | |
21725 | while (*p && *p != ')') | |
21726 | { | |
21727 | /* Find the extent of the current argument name. */ | |
21728 | const char *arg_start = p; | |
21729 | ||
21730 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
21731 | p++; | |
21732 | ||
21733 | if (! *p || p == arg_start) | |
4d3c2250 | 21734 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21735 | else |
21736 | { | |
21737 | /* Make sure argv has room for the new argument. */ | |
21738 | if (argc >= argv_size) | |
21739 | { | |
21740 | argv_size *= 2; | |
224c3ddb | 21741 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
21742 | } |
21743 | ||
3f8a7804 | 21744 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
21745 | } |
21746 | ||
21747 | p = consume_improper_spaces (p, body); | |
21748 | ||
21749 | /* Consume the comma, if present. */ | |
21750 | if (*p == ',') | |
21751 | { | |
21752 | p++; | |
21753 | ||
21754 | p = consume_improper_spaces (p, body); | |
21755 | } | |
21756 | } | |
21757 | ||
21758 | if (*p == ')') | |
21759 | { | |
21760 | p++; | |
21761 | ||
21762 | if (*p == ' ') | |
21763 | /* Perfectly formed definition, no complaints. */ | |
21764 | macro_define_function (file, line, name, | |
6e70227d | 21765 | argc, (const char **) argv, |
2e276125 JB |
21766 | p + 1); |
21767 | else if (*p == '\0') | |
21768 | { | |
21769 | /* Complain, but do define it. */ | |
4d3c2250 | 21770 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 21771 | macro_define_function (file, line, name, |
6e70227d | 21772 | argc, (const char **) argv, |
2e276125 JB |
21773 | p); |
21774 | } | |
21775 | else | |
21776 | /* Just complain. */ | |
4d3c2250 | 21777 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21778 | } |
21779 | else | |
21780 | /* Just complain. */ | |
4d3c2250 | 21781 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21782 | |
21783 | xfree (name); | |
21784 | { | |
21785 | int i; | |
21786 | ||
21787 | for (i = 0; i < argc; i++) | |
21788 | xfree (argv[i]); | |
21789 | } | |
21790 | xfree (argv); | |
21791 | } | |
21792 | else | |
4d3c2250 | 21793 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21794 | } |
21795 | ||
cf2c3c16 TT |
21796 | /* Skip some bytes from BYTES according to the form given in FORM. |
21797 | Returns the new pointer. */ | |
2e276125 | 21798 | |
d521ce57 TT |
21799 | static const gdb_byte * |
21800 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
21801 | enum dwarf_form form, |
21802 | unsigned int offset_size, | |
21803 | struct dwarf2_section_info *section) | |
2e276125 | 21804 | { |
cf2c3c16 | 21805 | unsigned int bytes_read; |
2e276125 | 21806 | |
cf2c3c16 | 21807 | switch (form) |
2e276125 | 21808 | { |
cf2c3c16 TT |
21809 | case DW_FORM_data1: |
21810 | case DW_FORM_flag: | |
21811 | ++bytes; | |
21812 | break; | |
21813 | ||
21814 | case DW_FORM_data2: | |
21815 | bytes += 2; | |
21816 | break; | |
21817 | ||
21818 | case DW_FORM_data4: | |
21819 | bytes += 4; | |
21820 | break; | |
21821 | ||
21822 | case DW_FORM_data8: | |
21823 | bytes += 8; | |
21824 | break; | |
21825 | ||
0224619f JK |
21826 | case DW_FORM_data16: |
21827 | bytes += 16; | |
21828 | break; | |
21829 | ||
cf2c3c16 TT |
21830 | case DW_FORM_string: |
21831 | read_direct_string (abfd, bytes, &bytes_read); | |
21832 | bytes += bytes_read; | |
21833 | break; | |
21834 | ||
21835 | case DW_FORM_sec_offset: | |
21836 | case DW_FORM_strp: | |
36586728 | 21837 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
21838 | bytes += offset_size; |
21839 | break; | |
21840 | ||
21841 | case DW_FORM_block: | |
21842 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
21843 | bytes += bytes_read; | |
21844 | break; | |
21845 | ||
21846 | case DW_FORM_block1: | |
21847 | bytes += 1 + read_1_byte (abfd, bytes); | |
21848 | break; | |
21849 | case DW_FORM_block2: | |
21850 | bytes += 2 + read_2_bytes (abfd, bytes); | |
21851 | break; | |
21852 | case DW_FORM_block4: | |
21853 | bytes += 4 + read_4_bytes (abfd, bytes); | |
21854 | break; | |
21855 | ||
21856 | case DW_FORM_sdata: | |
21857 | case DW_FORM_udata: | |
3019eac3 DE |
21858 | case DW_FORM_GNU_addr_index: |
21859 | case DW_FORM_GNU_str_index: | |
d521ce57 | 21860 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
21861 | if (bytes == NULL) |
21862 | { | |
21863 | dwarf2_section_buffer_overflow_complaint (section); | |
21864 | return NULL; | |
21865 | } | |
cf2c3c16 TT |
21866 | break; |
21867 | ||
663c44ac JK |
21868 | case DW_FORM_implicit_const: |
21869 | break; | |
21870 | ||
cf2c3c16 TT |
21871 | default: |
21872 | { | |
21873 | complain: | |
21874 | complaint (&symfile_complaints, | |
21875 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 21876 | form, get_section_name (section)); |
cf2c3c16 TT |
21877 | return NULL; |
21878 | } | |
2e276125 JB |
21879 | } |
21880 | ||
cf2c3c16 TT |
21881 | return bytes; |
21882 | } | |
757a13d0 | 21883 | |
cf2c3c16 TT |
21884 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
21885 | opcode. Returns an updated pointer to the macro data buffer; or, | |
21886 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 21887 | |
d521ce57 | 21888 | static const gdb_byte * |
cf2c3c16 | 21889 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
21890 | const gdb_byte **opcode_definitions, |
21891 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
21892 | bfd *abfd, |
21893 | unsigned int offset_size, | |
21894 | struct dwarf2_section_info *section) | |
21895 | { | |
21896 | unsigned int bytes_read, i; | |
21897 | unsigned long arg; | |
d521ce57 | 21898 | const gdb_byte *defn; |
2e276125 | 21899 | |
cf2c3c16 | 21900 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 21901 | { |
cf2c3c16 TT |
21902 | complaint (&symfile_complaints, |
21903 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
21904 | opcode); | |
21905 | return NULL; | |
21906 | } | |
2e276125 | 21907 | |
cf2c3c16 TT |
21908 | defn = opcode_definitions[opcode]; |
21909 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
21910 | defn += bytes_read; | |
2e276125 | 21911 | |
cf2c3c16 TT |
21912 | for (i = 0; i < arg; ++i) |
21913 | { | |
aead7601 SM |
21914 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
21915 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 21916 | section); |
cf2c3c16 TT |
21917 | if (mac_ptr == NULL) |
21918 | { | |
21919 | /* skip_form_bytes already issued the complaint. */ | |
21920 | return NULL; | |
21921 | } | |
21922 | } | |
757a13d0 | 21923 | |
cf2c3c16 TT |
21924 | return mac_ptr; |
21925 | } | |
757a13d0 | 21926 | |
cf2c3c16 TT |
21927 | /* A helper function which parses the header of a macro section. |
21928 | If the macro section is the extended (for now called "GNU") type, | |
21929 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
21930 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 21931 | |
d521ce57 TT |
21932 | static const gdb_byte * |
21933 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 21934 | bfd *abfd, |
d521ce57 | 21935 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
21936 | unsigned int *offset_size, |
21937 | int section_is_gnu) | |
21938 | { | |
21939 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 21940 | |
cf2c3c16 TT |
21941 | if (section_is_gnu) |
21942 | { | |
21943 | unsigned int version, flags; | |
757a13d0 | 21944 | |
cf2c3c16 | 21945 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 21946 | if (version != 4 && version != 5) |
cf2c3c16 TT |
21947 | { |
21948 | complaint (&symfile_complaints, | |
21949 | _("unrecognized version `%d' in .debug_macro section"), | |
21950 | version); | |
21951 | return NULL; | |
21952 | } | |
21953 | mac_ptr += 2; | |
757a13d0 | 21954 | |
cf2c3c16 TT |
21955 | flags = read_1_byte (abfd, mac_ptr); |
21956 | ++mac_ptr; | |
21957 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 21958 | |
cf2c3c16 TT |
21959 | if ((flags & 2) != 0) |
21960 | /* We don't need the line table offset. */ | |
21961 | mac_ptr += *offset_size; | |
757a13d0 | 21962 | |
cf2c3c16 TT |
21963 | /* Vendor opcode descriptions. */ |
21964 | if ((flags & 4) != 0) | |
21965 | { | |
21966 | unsigned int i, count; | |
757a13d0 | 21967 | |
cf2c3c16 TT |
21968 | count = read_1_byte (abfd, mac_ptr); |
21969 | ++mac_ptr; | |
21970 | for (i = 0; i < count; ++i) | |
21971 | { | |
21972 | unsigned int opcode, bytes_read; | |
21973 | unsigned long arg; | |
21974 | ||
21975 | opcode = read_1_byte (abfd, mac_ptr); | |
21976 | ++mac_ptr; | |
21977 | opcode_definitions[opcode] = mac_ptr; | |
21978 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21979 | mac_ptr += bytes_read; | |
21980 | mac_ptr += arg; | |
21981 | } | |
757a13d0 | 21982 | } |
cf2c3c16 | 21983 | } |
757a13d0 | 21984 | |
cf2c3c16 TT |
21985 | return mac_ptr; |
21986 | } | |
757a13d0 | 21987 | |
cf2c3c16 | 21988 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 21989 | including DW_MACRO_import. */ |
cf2c3c16 TT |
21990 | |
21991 | static void | |
d521ce57 TT |
21992 | dwarf_decode_macro_bytes (bfd *abfd, |
21993 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 21994 | struct macro_source_file *current_file, |
43f3e411 | 21995 | struct line_header *lh, |
cf2c3c16 | 21996 | struct dwarf2_section_info *section, |
36586728 | 21997 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 21998 | unsigned int offset_size, |
8fc3fc34 | 21999 | htab_t include_hash) |
cf2c3c16 | 22000 | { |
4d663531 | 22001 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22002 | enum dwarf_macro_record_type macinfo_type; |
22003 | int at_commandline; | |
d521ce57 | 22004 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22005 | |
cf2c3c16 TT |
22006 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22007 | &offset_size, section_is_gnu); | |
22008 | if (mac_ptr == NULL) | |
22009 | { | |
22010 | /* We already issued a complaint. */ | |
22011 | return; | |
22012 | } | |
757a13d0 JK |
22013 | |
22014 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22015 | GDB is still reading the definitions from command line. First | |
22016 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22017 | to create CURRENT_FILE for the main source holding also the command line | |
22018 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22019 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22020 | ||
22021 | at_commandline = 1; | |
22022 | ||
22023 | do | |
22024 | { | |
22025 | /* Do we at least have room for a macinfo type byte? */ | |
22026 | if (mac_ptr >= mac_end) | |
22027 | { | |
f664829e | 22028 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22029 | break; |
22030 | } | |
22031 | ||
aead7601 | 22032 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22033 | mac_ptr++; |
22034 | ||
cf2c3c16 TT |
22035 | /* Note that we rely on the fact that the corresponding GNU and |
22036 | DWARF constants are the same. */ | |
757a13d0 JK |
22037 | switch (macinfo_type) |
22038 | { | |
22039 | /* A zero macinfo type indicates the end of the macro | |
22040 | information. */ | |
22041 | case 0: | |
22042 | break; | |
2e276125 | 22043 | |
0af92d60 JK |
22044 | case DW_MACRO_define: |
22045 | case DW_MACRO_undef: | |
22046 | case DW_MACRO_define_strp: | |
22047 | case DW_MACRO_undef_strp: | |
22048 | case DW_MACRO_define_sup: | |
22049 | case DW_MACRO_undef_sup: | |
2e276125 | 22050 | { |
891d2f0b | 22051 | unsigned int bytes_read; |
2e276125 | 22052 | int line; |
d521ce57 | 22053 | const char *body; |
cf2c3c16 | 22054 | int is_define; |
2e276125 | 22055 | |
cf2c3c16 TT |
22056 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22057 | mac_ptr += bytes_read; | |
22058 | ||
0af92d60 JK |
22059 | if (macinfo_type == DW_MACRO_define |
22060 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22061 | { |
22062 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22063 | mac_ptr += bytes_read; | |
22064 | } | |
22065 | else | |
22066 | { | |
22067 | LONGEST str_offset; | |
22068 | ||
22069 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22070 | mac_ptr += offset_size; | |
2e276125 | 22071 | |
0af92d60 JK |
22072 | if (macinfo_type == DW_MACRO_define_sup |
22073 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22074 | || section_is_dwz) |
36586728 TT |
22075 | { |
22076 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22077 | ||
22078 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
22079 | } | |
22080 | else | |
22081 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
22082 | } |
22083 | ||
0af92d60 JK |
22084 | is_define = (macinfo_type == DW_MACRO_define |
22085 | || macinfo_type == DW_MACRO_define_strp | |
22086 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 22087 | if (! current_file) |
757a13d0 JK |
22088 | { |
22089 | /* DWARF violation as no main source is present. */ | |
22090 | complaint (&symfile_complaints, | |
22091 | _("debug info with no main source gives macro %s " | |
22092 | "on line %d: %s"), | |
cf2c3c16 TT |
22093 | is_define ? _("definition") : _("undefinition"), |
22094 | line, body); | |
757a13d0 JK |
22095 | break; |
22096 | } | |
3e43a32a MS |
22097 | if ((line == 0 && !at_commandline) |
22098 | || (line != 0 && at_commandline)) | |
4d3c2250 | 22099 | complaint (&symfile_complaints, |
757a13d0 JK |
22100 | _("debug info gives %s macro %s with %s line %d: %s"), |
22101 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 22102 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
22103 | line == 0 ? _("zero") : _("non-zero"), line, body); |
22104 | ||
cf2c3c16 | 22105 | if (is_define) |
757a13d0 | 22106 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
22107 | else |
22108 | { | |
0af92d60 JK |
22109 | gdb_assert (macinfo_type == DW_MACRO_undef |
22110 | || macinfo_type == DW_MACRO_undef_strp | |
22111 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
22112 | macro_undef (current_file, line, body); |
22113 | } | |
2e276125 JB |
22114 | } |
22115 | break; | |
22116 | ||
0af92d60 | 22117 | case DW_MACRO_start_file: |
2e276125 | 22118 | { |
891d2f0b | 22119 | unsigned int bytes_read; |
2e276125 JB |
22120 | int line, file; |
22121 | ||
22122 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22123 | mac_ptr += bytes_read; | |
22124 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22125 | mac_ptr += bytes_read; | |
22126 | ||
3e43a32a MS |
22127 | if ((line == 0 && !at_commandline) |
22128 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
22129 | complaint (&symfile_complaints, |
22130 | _("debug info gives source %d included " | |
22131 | "from %s at %s line %d"), | |
22132 | file, at_commandline ? _("command-line") : _("file"), | |
22133 | line == 0 ? _("zero") : _("non-zero"), line); | |
22134 | ||
22135 | if (at_commandline) | |
22136 | { | |
0af92d60 | 22137 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 22138 | pass one. */ |
757a13d0 JK |
22139 | at_commandline = 0; |
22140 | } | |
22141 | else | |
43f3e411 | 22142 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
22143 | } |
22144 | break; | |
22145 | ||
0af92d60 | 22146 | case DW_MACRO_end_file: |
2e276125 | 22147 | if (! current_file) |
4d3c2250 | 22148 | complaint (&symfile_complaints, |
3e43a32a MS |
22149 | _("macro debug info has an unmatched " |
22150 | "`close_file' directive")); | |
2e276125 JB |
22151 | else |
22152 | { | |
22153 | current_file = current_file->included_by; | |
22154 | if (! current_file) | |
22155 | { | |
cf2c3c16 | 22156 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
22157 | |
22158 | /* GCC circa March 2002 doesn't produce the zero | |
22159 | type byte marking the end of the compilation | |
22160 | unit. Complain if it's not there, but exit no | |
22161 | matter what. */ | |
22162 | ||
22163 | /* Do we at least have room for a macinfo type byte? */ | |
22164 | if (mac_ptr >= mac_end) | |
22165 | { | |
f664829e | 22166 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
22167 | return; |
22168 | } | |
22169 | ||
22170 | /* We don't increment mac_ptr here, so this is just | |
22171 | a look-ahead. */ | |
aead7601 SM |
22172 | next_type |
22173 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
22174 | mac_ptr); | |
2e276125 | 22175 | if (next_type != 0) |
4d3c2250 | 22176 | complaint (&symfile_complaints, |
3e43a32a MS |
22177 | _("no terminating 0-type entry for " |
22178 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
22179 | |
22180 | return; | |
22181 | } | |
22182 | } | |
22183 | break; | |
22184 | ||
0af92d60 JK |
22185 | case DW_MACRO_import: |
22186 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
22187 | { |
22188 | LONGEST offset; | |
8fc3fc34 | 22189 | void **slot; |
a036ba48 TT |
22190 | bfd *include_bfd = abfd; |
22191 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 22192 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 22193 | int is_dwz = section_is_dwz; |
d521ce57 | 22194 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
22195 | |
22196 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22197 | mac_ptr += offset_size; | |
22198 | ||
0af92d60 | 22199 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
22200 | { |
22201 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22202 | ||
4d663531 | 22203 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 22204 | |
a036ba48 | 22205 | include_section = &dwz->macro; |
a32a8923 | 22206 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
22207 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
22208 | is_dwz = 1; | |
22209 | } | |
22210 | ||
22211 | new_mac_ptr = include_section->buffer + offset; | |
22212 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
22213 | ||
8fc3fc34 TT |
22214 | if (*slot != NULL) |
22215 | { | |
22216 | /* This has actually happened; see | |
22217 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
22218 | complaint (&symfile_complaints, | |
0af92d60 | 22219 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
22220 | ".debug_macro section")); |
22221 | } | |
22222 | else | |
22223 | { | |
d521ce57 | 22224 | *slot = (void *) new_mac_ptr; |
36586728 | 22225 | |
a036ba48 | 22226 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 22227 | include_mac_end, current_file, lh, |
36586728 | 22228 | section, section_is_gnu, is_dwz, |
4d663531 | 22229 | offset_size, include_hash); |
8fc3fc34 | 22230 | |
d521ce57 | 22231 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 22232 | } |
cf2c3c16 TT |
22233 | } |
22234 | break; | |
22235 | ||
2e276125 | 22236 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
22237 | if (!section_is_gnu) |
22238 | { | |
22239 | unsigned int bytes_read; | |
2e276125 | 22240 | |
ac298888 TT |
22241 | /* This reads the constant, but since we don't recognize |
22242 | any vendor extensions, we ignore it. */ | |
22243 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
22244 | mac_ptr += bytes_read; |
22245 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22246 | mac_ptr += bytes_read; | |
2e276125 | 22247 | |
cf2c3c16 TT |
22248 | /* We don't recognize any vendor extensions. */ |
22249 | break; | |
22250 | } | |
22251 | /* FALLTHROUGH */ | |
22252 | ||
22253 | default: | |
22254 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22255 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22256 | section); |
22257 | if (mac_ptr == NULL) | |
22258 | return; | |
22259 | break; | |
2e276125 | 22260 | } |
757a13d0 | 22261 | } while (macinfo_type != 0); |
2e276125 | 22262 | } |
8e19ed76 | 22263 | |
cf2c3c16 | 22264 | static void |
09262596 | 22265 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 22266 | int section_is_gnu) |
cf2c3c16 | 22267 | { |
bb5ed363 | 22268 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
22269 | struct line_header *lh = cu->line_header; |
22270 | bfd *abfd; | |
d521ce57 | 22271 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
22272 | struct macro_source_file *current_file = 0; |
22273 | enum dwarf_macro_record_type macinfo_type; | |
22274 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 22275 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 22276 | void **slot; |
09262596 DE |
22277 | struct dwarf2_section_info *section; |
22278 | const char *section_name; | |
22279 | ||
22280 | if (cu->dwo_unit != NULL) | |
22281 | { | |
22282 | if (section_is_gnu) | |
22283 | { | |
22284 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
22285 | section_name = ".debug_macro.dwo"; | |
22286 | } | |
22287 | else | |
22288 | { | |
22289 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
22290 | section_name = ".debug_macinfo.dwo"; | |
22291 | } | |
22292 | } | |
22293 | else | |
22294 | { | |
22295 | if (section_is_gnu) | |
22296 | { | |
22297 | section = &dwarf2_per_objfile->macro; | |
22298 | section_name = ".debug_macro"; | |
22299 | } | |
22300 | else | |
22301 | { | |
22302 | section = &dwarf2_per_objfile->macinfo; | |
22303 | section_name = ".debug_macinfo"; | |
22304 | } | |
22305 | } | |
cf2c3c16 | 22306 | |
bb5ed363 | 22307 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
22308 | if (section->buffer == NULL) |
22309 | { | |
fceca515 | 22310 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
22311 | return; |
22312 | } | |
a32a8923 | 22313 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
22314 | |
22315 | /* First pass: Find the name of the base filename. | |
22316 | This filename is needed in order to process all macros whose definition | |
22317 | (or undefinition) comes from the command line. These macros are defined | |
22318 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
22319 | associated to the base file. | |
22320 | ||
22321 | To determine the base file name, we scan the macro definitions until we | |
22322 | reach the first DW_MACINFO_start_file entry. We then initialize | |
22323 | CURRENT_FILE accordingly so that any macro definition found before the | |
22324 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
22325 | ||
22326 | mac_ptr = section->buffer + offset; | |
22327 | mac_end = section->buffer + section->size; | |
22328 | ||
22329 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
22330 | &offset_size, section_is_gnu); | |
22331 | if (mac_ptr == NULL) | |
22332 | { | |
22333 | /* We already issued a complaint. */ | |
22334 | return; | |
22335 | } | |
22336 | ||
22337 | do | |
22338 | { | |
22339 | /* Do we at least have room for a macinfo type byte? */ | |
22340 | if (mac_ptr >= mac_end) | |
22341 | { | |
22342 | /* Complaint is printed during the second pass as GDB will probably | |
22343 | stop the first pass earlier upon finding | |
22344 | DW_MACINFO_start_file. */ | |
22345 | break; | |
22346 | } | |
22347 | ||
aead7601 | 22348 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
22349 | mac_ptr++; |
22350 | ||
22351 | /* Note that we rely on the fact that the corresponding GNU and | |
22352 | DWARF constants are the same. */ | |
22353 | switch (macinfo_type) | |
22354 | { | |
22355 | /* A zero macinfo type indicates the end of the macro | |
22356 | information. */ | |
22357 | case 0: | |
22358 | break; | |
22359 | ||
0af92d60 JK |
22360 | case DW_MACRO_define: |
22361 | case DW_MACRO_undef: | |
cf2c3c16 TT |
22362 | /* Only skip the data by MAC_PTR. */ |
22363 | { | |
22364 | unsigned int bytes_read; | |
22365 | ||
22366 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22367 | mac_ptr += bytes_read; | |
22368 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22369 | mac_ptr += bytes_read; | |
22370 | } | |
22371 | break; | |
22372 | ||
0af92d60 | 22373 | case DW_MACRO_start_file: |
cf2c3c16 TT |
22374 | { |
22375 | unsigned int bytes_read; | |
22376 | int line, file; | |
22377 | ||
22378 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22379 | mac_ptr += bytes_read; | |
22380 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22381 | mac_ptr += bytes_read; | |
22382 | ||
43f3e411 | 22383 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
22384 | } |
22385 | break; | |
22386 | ||
0af92d60 | 22387 | case DW_MACRO_end_file: |
cf2c3c16 TT |
22388 | /* No data to skip by MAC_PTR. */ |
22389 | break; | |
22390 | ||
0af92d60 JK |
22391 | case DW_MACRO_define_strp: |
22392 | case DW_MACRO_undef_strp: | |
22393 | case DW_MACRO_define_sup: | |
22394 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
22395 | { |
22396 | unsigned int bytes_read; | |
22397 | ||
22398 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22399 | mac_ptr += bytes_read; | |
22400 | mac_ptr += offset_size; | |
22401 | } | |
22402 | break; | |
22403 | ||
0af92d60 JK |
22404 | case DW_MACRO_import: |
22405 | case DW_MACRO_import_sup: | |
cf2c3c16 | 22406 | /* Note that, according to the spec, a transparent include |
0af92d60 | 22407 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
22408 | skip this opcode. */ |
22409 | mac_ptr += offset_size; | |
22410 | break; | |
22411 | ||
22412 | case DW_MACINFO_vendor_ext: | |
22413 | /* Only skip the data by MAC_PTR. */ | |
22414 | if (!section_is_gnu) | |
22415 | { | |
22416 | unsigned int bytes_read; | |
22417 | ||
22418 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22419 | mac_ptr += bytes_read; | |
22420 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22421 | mac_ptr += bytes_read; | |
22422 | } | |
22423 | /* FALLTHROUGH */ | |
22424 | ||
22425 | default: | |
22426 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22427 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22428 | section); |
22429 | if (mac_ptr == NULL) | |
22430 | return; | |
22431 | break; | |
22432 | } | |
22433 | } while (macinfo_type != 0 && current_file == NULL); | |
22434 | ||
22435 | /* Second pass: Process all entries. | |
22436 | ||
22437 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
22438 | command-line macro definitions/undefinitions. This flag is unset when we | |
22439 | reach the first DW_MACINFO_start_file entry. */ | |
22440 | ||
fc4007c9 TT |
22441 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
22442 | htab_eq_pointer, | |
22443 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 22444 | mac_ptr = section->buffer + offset; |
fc4007c9 | 22445 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 22446 | *slot = (void *) mac_ptr; |
8fc3fc34 | 22447 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 22448 | current_file, lh, section, |
fc4007c9 TT |
22449 | section_is_gnu, 0, offset_size, |
22450 | include_hash.get ()); | |
cf2c3c16 TT |
22451 | } |
22452 | ||
8e19ed76 | 22453 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 22454 | if so return true else false. */ |
380bca97 | 22455 | |
8e19ed76 | 22456 | static int |
6e5a29e1 | 22457 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
22458 | { |
22459 | return (attr == NULL ? 0 : | |
22460 | attr->form == DW_FORM_block1 | |
22461 | || attr->form == DW_FORM_block2 | |
22462 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
22463 | || attr->form == DW_FORM_block |
22464 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 22465 | } |
4c2df51b | 22466 | |
c6a0999f JB |
22467 | /* Return non-zero if ATTR's value is a section offset --- classes |
22468 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
22469 | You may use DW_UNSND (attr) to retrieve such offsets. | |
22470 | ||
22471 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
22472 | may have a value that belongs to more than one of these classes; it | |
22473 | would be ambiguous if we did, because we use the same forms for all | |
22474 | of them. */ | |
380bca97 | 22475 | |
3690dd37 | 22476 | static int |
6e5a29e1 | 22477 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
22478 | { |
22479 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
22480 | || attr->form == DW_FORM_data8 |
22481 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
22482 | } |
22483 | ||
3690dd37 JB |
22484 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
22485 | zero otherwise. When this function returns true, you can apply | |
22486 | dwarf2_get_attr_constant_value to it. | |
22487 | ||
22488 | However, note that for some attributes you must check | |
22489 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
22490 | and DW_FORM_data8 are members of both the constant class, and of | |
22491 | the classes that contain offsets into other debug sections | |
22492 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
22493 | that, if an attribute's can be either a constant or one of the | |
22494 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
22495 | taken as section offsets, not constants. |
22496 | ||
22497 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
22498 | cannot handle that. */ | |
380bca97 | 22499 | |
3690dd37 | 22500 | static int |
6e5a29e1 | 22501 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
22502 | { |
22503 | switch (attr->form) | |
22504 | { | |
22505 | case DW_FORM_sdata: | |
22506 | case DW_FORM_udata: | |
22507 | case DW_FORM_data1: | |
22508 | case DW_FORM_data2: | |
22509 | case DW_FORM_data4: | |
22510 | case DW_FORM_data8: | |
663c44ac | 22511 | case DW_FORM_implicit_const: |
3690dd37 JB |
22512 | return 1; |
22513 | default: | |
22514 | return 0; | |
22515 | } | |
22516 | } | |
22517 | ||
7771576e SA |
22518 | |
22519 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
22520 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
22521 | ||
22522 | static int | |
6e5a29e1 | 22523 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
22524 | { |
22525 | switch (attr->form) | |
22526 | { | |
22527 | case DW_FORM_ref_addr: | |
22528 | case DW_FORM_ref1: | |
22529 | case DW_FORM_ref2: | |
22530 | case DW_FORM_ref4: | |
22531 | case DW_FORM_ref8: | |
22532 | case DW_FORM_ref_udata: | |
22533 | case DW_FORM_GNU_ref_alt: | |
22534 | return 1; | |
22535 | default: | |
22536 | return 0; | |
22537 | } | |
22538 | } | |
22539 | ||
3019eac3 DE |
22540 | /* Return the .debug_loc section to use for CU. |
22541 | For DWO files use .debug_loc.dwo. */ | |
22542 | ||
22543 | static struct dwarf2_section_info * | |
22544 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
22545 | { | |
22546 | if (cu->dwo_unit) | |
43988095 JK |
22547 | { |
22548 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
22549 | ||
22550 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
22551 | } | |
22552 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
22553 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
22554 | } |
22555 | ||
8cf6f0b1 TT |
22556 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
22557 | ||
22558 | static void | |
22559 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
22560 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 22561 | const struct attribute *attr) |
8cf6f0b1 | 22562 | { |
3019eac3 DE |
22563 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
22564 | ||
22565 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
22566 | |
22567 | baton->per_cu = cu->per_cu; | |
22568 | gdb_assert (baton->per_cu); | |
22569 | /* We don't know how long the location list is, but make sure we | |
22570 | don't run off the edge of the section. */ | |
3019eac3 DE |
22571 | baton->size = section->size - DW_UNSND (attr); |
22572 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 22573 | baton->base_address = cu->base_address; |
f664829e | 22574 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
22575 | } |
22576 | ||
4c2df51b | 22577 | static void |
ff39bb5e | 22578 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 22579 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 22580 | { |
bb5ed363 | 22581 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 22582 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 22583 | |
3690dd37 | 22584 | if (attr_form_is_section_offset (attr) |
3019eac3 | 22585 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
22586 | the section. If so, fall through to the complaint in the |
22587 | other branch. */ | |
3019eac3 | 22588 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 22589 | { |
0d53c4c4 | 22590 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 22591 | |
8d749320 | 22592 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 22593 | |
8cf6f0b1 | 22594 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 22595 | |
d00adf39 | 22596 | if (cu->base_known == 0) |
0d53c4c4 | 22597 | complaint (&symfile_complaints, |
3e43a32a MS |
22598 | _("Location list used without " |
22599 | "specifying the CU base address.")); | |
4c2df51b | 22600 | |
f1e6e072 TT |
22601 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
22602 | ? dwarf2_loclist_block_index | |
22603 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
22604 | SYMBOL_LOCATION_BATON (sym) = baton; |
22605 | } | |
22606 | else | |
22607 | { | |
22608 | struct dwarf2_locexpr_baton *baton; | |
22609 | ||
8d749320 | 22610 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
22611 | baton->per_cu = cu->per_cu; |
22612 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
22613 | |
22614 | if (attr_form_is_block (attr)) | |
22615 | { | |
22616 | /* Note that we're just copying the block's data pointer | |
22617 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
22618 | info_buffer for SYM's objfile; right now we never release |
22619 | that buffer, but when we do clean up properly this may | |
22620 | need to change. */ | |
0d53c4c4 DJ |
22621 | baton->size = DW_BLOCK (attr)->size; |
22622 | baton->data = DW_BLOCK (attr)->data; | |
22623 | } | |
22624 | else | |
22625 | { | |
22626 | dwarf2_invalid_attrib_class_complaint ("location description", | |
22627 | SYMBOL_NATURAL_NAME (sym)); | |
22628 | baton->size = 0; | |
0d53c4c4 | 22629 | } |
6e70227d | 22630 | |
f1e6e072 TT |
22631 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
22632 | ? dwarf2_locexpr_block_index | |
22633 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
22634 | SYMBOL_LOCATION_BATON (sym) = baton; |
22635 | } | |
4c2df51b | 22636 | } |
6502dd73 | 22637 | |
9aa1f1e3 TT |
22638 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
22639 | came from a separate debuginfo file, then the master objfile is | |
22640 | returned. */ | |
ae0d2f24 UW |
22641 | |
22642 | struct objfile * | |
22643 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
22644 | { | |
9291a0cd | 22645 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
22646 | |
22647 | /* Return the master objfile, so that we can report and look up the | |
22648 | correct file containing this variable. */ | |
22649 | if (objfile->separate_debug_objfile_backlink) | |
22650 | objfile = objfile->separate_debug_objfile_backlink; | |
22651 | ||
22652 | return objfile; | |
22653 | } | |
22654 | ||
96408a79 SA |
22655 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
22656 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
22657 | CU_HEADERP first. */ | |
22658 | ||
22659 | static const struct comp_unit_head * | |
22660 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
22661 | struct dwarf2_per_cu_data *per_cu) | |
22662 | { | |
d521ce57 | 22663 | const gdb_byte *info_ptr; |
96408a79 SA |
22664 | |
22665 | if (per_cu->cu) | |
22666 | return &per_cu->cu->header; | |
22667 | ||
9c541725 | 22668 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
22669 | |
22670 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
22671 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
22672 | rcuh_kind::COMPILE); | |
96408a79 SA |
22673 | |
22674 | return cu_headerp; | |
22675 | } | |
22676 | ||
ae0d2f24 UW |
22677 | /* Return the address size given in the compilation unit header for CU. */ |
22678 | ||
98714339 | 22679 | int |
ae0d2f24 UW |
22680 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
22681 | { | |
96408a79 SA |
22682 | struct comp_unit_head cu_header_local; |
22683 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 22684 | |
96408a79 SA |
22685 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22686 | ||
22687 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
22688 | } |
22689 | ||
9eae7c52 TT |
22690 | /* Return the offset size given in the compilation unit header for CU. */ |
22691 | ||
22692 | int | |
22693 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
22694 | { | |
96408a79 SA |
22695 | struct comp_unit_head cu_header_local; |
22696 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 22697 | |
96408a79 SA |
22698 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22699 | ||
22700 | return cu_headerp->offset_size; | |
22701 | } | |
22702 | ||
22703 | /* See its dwarf2loc.h declaration. */ | |
22704 | ||
22705 | int | |
22706 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
22707 | { | |
22708 | struct comp_unit_head cu_header_local; | |
22709 | const struct comp_unit_head *cu_headerp; | |
22710 | ||
22711 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
22712 | ||
22713 | if (cu_headerp->version == 2) | |
22714 | return cu_headerp->addr_size; | |
22715 | else | |
22716 | return cu_headerp->offset_size; | |
181cebd4 JK |
22717 | } |
22718 | ||
9aa1f1e3 TT |
22719 | /* Return the text offset of the CU. The returned offset comes from |
22720 | this CU's objfile. If this objfile came from a separate debuginfo | |
22721 | file, then the offset may be different from the corresponding | |
22722 | offset in the parent objfile. */ | |
22723 | ||
22724 | CORE_ADDR | |
22725 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
22726 | { | |
bb3fa9d0 | 22727 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
22728 | |
22729 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22730 | } | |
22731 | ||
43988095 JK |
22732 | /* Return DWARF version number of PER_CU. */ |
22733 | ||
22734 | short | |
22735 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
22736 | { | |
22737 | return per_cu->dwarf_version; | |
22738 | } | |
22739 | ||
348e048f DE |
22740 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
22741 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
22742 | |
22743 | static struct dwarf2_per_cu_data * | |
9c541725 | 22744 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 22745 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
22746 | struct objfile *objfile) |
22747 | { | |
22748 | struct dwarf2_per_cu_data *this_cu; | |
22749 | int low, high; | |
36586728 | 22750 | const sect_offset *cu_off; |
ae038cb0 | 22751 | |
ae038cb0 DJ |
22752 | low = 0; |
22753 | high = dwarf2_per_objfile->n_comp_units - 1; | |
22754 | while (high > low) | |
22755 | { | |
36586728 | 22756 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 22757 | int mid = low + (high - low) / 2; |
9a619af0 | 22758 | |
36586728 | 22759 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 22760 | cu_off = &mid_cu->sect_off; |
36586728 | 22761 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 22762 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
22763 | high = mid; |
22764 | else | |
22765 | low = mid + 1; | |
22766 | } | |
22767 | gdb_assert (low == high); | |
36586728 | 22768 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
22769 | cu_off = &this_cu->sect_off; |
22770 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 22771 | { |
36586728 | 22772 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 22773 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
22774 | "offset 0x%x [in module %s]"), |
22775 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 22776 | |
9c541725 PA |
22777 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
22778 | <= sect_off); | |
ae038cb0 DJ |
22779 | return dwarf2_per_objfile->all_comp_units[low-1]; |
22780 | } | |
22781 | else | |
22782 | { | |
22783 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
22784 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
22785 | && sect_off >= this_cu->sect_off + this_cu->length) |
22786 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
22787 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
22788 | return this_cu; |
22789 | } | |
22790 | } | |
22791 | ||
23745b47 | 22792 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 22793 | |
9816fde3 | 22794 | static void |
23745b47 | 22795 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 22796 | { |
9816fde3 | 22797 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
22798 | per_cu->cu = cu; |
22799 | cu->per_cu = per_cu; | |
22800 | cu->objfile = per_cu->objfile; | |
93311388 | 22801 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
22802 | } |
22803 | ||
22804 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
22805 | ||
22806 | static void | |
95554aad TT |
22807 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
22808 | enum language pretend_language) | |
9816fde3 JK |
22809 | { |
22810 | struct attribute *attr; | |
22811 | ||
22812 | /* Set the language we're debugging. */ | |
22813 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
22814 | if (attr) | |
22815 | set_cu_language (DW_UNSND (attr), cu); | |
22816 | else | |
9cded63f | 22817 | { |
95554aad | 22818 | cu->language = pretend_language; |
9cded63f TT |
22819 | cu->language_defn = language_def (cu->language); |
22820 | } | |
dee91e82 | 22821 | |
7d45c7c3 | 22822 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
22823 | } |
22824 | ||
ae038cb0 DJ |
22825 | /* Release one cached compilation unit, CU. We unlink it from the tree |
22826 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
22827 | the caller is responsible for that. |
22828 | NOTE: DATA is a void * because this function is also used as a | |
22829 | cleanup routine. */ | |
ae038cb0 DJ |
22830 | |
22831 | static void | |
68dc6402 | 22832 | free_heap_comp_unit (void *data) |
ae038cb0 | 22833 | { |
9a3c8263 | 22834 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 22835 | |
23745b47 DE |
22836 | gdb_assert (cu->per_cu != NULL); |
22837 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
22838 | cu->per_cu = NULL; |
22839 | ||
22840 | obstack_free (&cu->comp_unit_obstack, NULL); | |
22841 | ||
22842 | xfree (cu); | |
22843 | } | |
22844 | ||
72bf9492 | 22845 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 22846 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 22847 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
22848 | |
22849 | static void | |
22850 | free_stack_comp_unit (void *data) | |
22851 | { | |
9a3c8263 | 22852 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 22853 | |
23745b47 DE |
22854 | gdb_assert (cu->per_cu != NULL); |
22855 | cu->per_cu->cu = NULL; | |
22856 | cu->per_cu = NULL; | |
22857 | ||
72bf9492 DJ |
22858 | obstack_free (&cu->comp_unit_obstack, NULL); |
22859 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
22860 | } |
22861 | ||
22862 | /* Free all cached compilation units. */ | |
22863 | ||
22864 | static void | |
22865 | free_cached_comp_units (void *data) | |
22866 | { | |
330cdd98 | 22867 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
22868 | } |
22869 | ||
22870 | /* Increase the age counter on each cached compilation unit, and free | |
22871 | any that are too old. */ | |
22872 | ||
22873 | static void | |
22874 | age_cached_comp_units (void) | |
22875 | { | |
22876 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22877 | ||
22878 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
22879 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22880 | while (per_cu != NULL) | |
22881 | { | |
22882 | per_cu->cu->last_used ++; | |
b4f54984 | 22883 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
22884 | dwarf2_mark (per_cu->cu); |
22885 | per_cu = per_cu->cu->read_in_chain; | |
22886 | } | |
22887 | ||
22888 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22889 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22890 | while (per_cu != NULL) | |
22891 | { | |
22892 | struct dwarf2_per_cu_data *next_cu; | |
22893 | ||
22894 | next_cu = per_cu->cu->read_in_chain; | |
22895 | ||
22896 | if (!per_cu->cu->mark) | |
22897 | { | |
68dc6402 | 22898 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22899 | *last_chain = next_cu; |
22900 | } | |
22901 | else | |
22902 | last_chain = &per_cu->cu->read_in_chain; | |
22903 | ||
22904 | per_cu = next_cu; | |
22905 | } | |
22906 | } | |
22907 | ||
22908 | /* Remove a single compilation unit from the cache. */ | |
22909 | ||
22910 | static void | |
dee91e82 | 22911 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
22912 | { |
22913 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22914 | ||
22915 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22916 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22917 | while (per_cu != NULL) | |
22918 | { | |
22919 | struct dwarf2_per_cu_data *next_cu; | |
22920 | ||
22921 | next_cu = per_cu->cu->read_in_chain; | |
22922 | ||
dee91e82 | 22923 | if (per_cu == target_per_cu) |
ae038cb0 | 22924 | { |
68dc6402 | 22925 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 22926 | per_cu->cu = NULL; |
ae038cb0 DJ |
22927 | *last_chain = next_cu; |
22928 | break; | |
22929 | } | |
22930 | else | |
22931 | last_chain = &per_cu->cu->read_in_chain; | |
22932 | ||
22933 | per_cu = next_cu; | |
22934 | } | |
22935 | } | |
22936 | ||
fe3e1990 DJ |
22937 | /* Release all extra memory associated with OBJFILE. */ |
22938 | ||
22939 | void | |
22940 | dwarf2_free_objfile (struct objfile *objfile) | |
22941 | { | |
9a3c8263 SM |
22942 | dwarf2_per_objfile |
22943 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
22944 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
22945 | |
22946 | if (dwarf2_per_objfile == NULL) | |
22947 | return; | |
22948 | ||
330cdd98 | 22949 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
22950 | } |
22951 | ||
dee91e82 DE |
22952 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
22953 | We store these in a hash table separate from the DIEs, and preserve them | |
22954 | when the DIEs are flushed out of cache. | |
22955 | ||
22956 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 22957 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
22958 | or the type may come from a DWO file. Furthermore, while it's more logical |
22959 | to use per_cu->section+offset, with Fission the section with the data is in | |
22960 | the DWO file but we don't know that section at the point we need it. | |
22961 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
22962 | because we can enter the lookup routine, get_die_type_at_offset, from | |
22963 | outside this file, and thus won't necessarily have PER_CU->cu. | |
22964 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 22965 | |
dee91e82 | 22966 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 22967 | { |
dee91e82 | 22968 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 22969 | sect_offset sect_off; |
1c379e20 DJ |
22970 | struct type *type; |
22971 | }; | |
22972 | ||
dee91e82 | 22973 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22974 | |
22975 | static hashval_t | |
dee91e82 | 22976 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 22977 | { |
9a3c8263 SM |
22978 | const struct dwarf2_per_cu_offset_and_type *ofs |
22979 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 22980 | |
9c541725 | 22981 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
22982 | } |
22983 | ||
dee91e82 | 22984 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22985 | |
22986 | static int | |
dee91e82 | 22987 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 22988 | { |
9a3c8263 SM |
22989 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
22990 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
22991 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
22992 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 22993 | |
dee91e82 | 22994 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 22995 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
22996 | } |
22997 | ||
22998 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
22999 | table if necessary. For convenience, return TYPE. |
23000 | ||
23001 | The DIEs reading must have careful ordering to: | |
23002 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23003 | reading current DIE. | |
23004 | * Not trying to dereference contents of still incompletely read in types | |
23005 | while reading in other DIEs. | |
23006 | * Enable referencing still incompletely read in types just by a pointer to | |
23007 | the type without accessing its fields. | |
23008 | ||
23009 | Therefore caller should follow these rules: | |
23010 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23011 | before building the type and calling set_die_type. | |
e71ec853 | 23012 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23013 | possible before fetching more types to complete the current type. |
23014 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23015 | |
f792889a | 23016 | static struct type * |
1c379e20 DJ |
23017 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23018 | { | |
dee91e82 | 23019 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23020 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23021 | struct attribute *attr; |
23022 | struct dynamic_prop prop; | |
1c379e20 | 23023 | |
b4ba55a1 JB |
23024 | /* For Ada types, make sure that the gnat-specific data is always |
23025 | initialized (if not already set). There are a few types where | |
23026 | we should not be doing so, because the type-specific area is | |
23027 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23028 | where the type-specific area is used to store the floatformat). | |
23029 | But this is not a problem, because the gnat-specific information | |
23030 | is actually not needed for these types. */ | |
23031 | if (need_gnat_info (cu) | |
23032 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23033 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23034 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23035 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23036 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23037 | && !HAVE_GNAT_AUX_INFO (type)) |
23038 | INIT_GNAT_SPECIFIC (type); | |
23039 | ||
3f2f83dd KB |
23040 | /* Read DW_AT_allocated and set in type. */ |
23041 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23042 | if (attr_form_is_block (attr)) | |
23043 | { | |
23044 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23045 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23046 | } | |
23047 | else if (attr != NULL) | |
23048 | { | |
23049 | complaint (&symfile_complaints, | |
9c541725 PA |
23050 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23051 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23052 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23053 | } |
23054 | ||
23055 | /* Read DW_AT_associated and set in type. */ | |
23056 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23057 | if (attr_form_is_block (attr)) | |
23058 | { | |
23059 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23060 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23061 | } | |
23062 | else if (attr != NULL) | |
23063 | { | |
23064 | complaint (&symfile_complaints, | |
9c541725 PA |
23065 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23066 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23067 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23068 | } |
23069 | ||
3cdcd0ce JB |
23070 | /* Read DW_AT_data_location and set in type. */ |
23071 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23072 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23073 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23074 | |
dee91e82 | 23075 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23076 | { |
dee91e82 DE |
23077 | dwarf2_per_objfile->die_type_hash = |
23078 | htab_create_alloc_ex (127, | |
23079 | per_cu_offset_and_type_hash, | |
23080 | per_cu_offset_and_type_eq, | |
23081 | NULL, | |
23082 | &objfile->objfile_obstack, | |
23083 | hashtab_obstack_allocate, | |
23084 | dummy_obstack_deallocate); | |
f792889a | 23085 | } |
1c379e20 | 23086 | |
dee91e82 | 23087 | ofs.per_cu = cu->per_cu; |
9c541725 | 23088 | ofs.sect_off = die->sect_off; |
1c379e20 | 23089 | ofs.type = type; |
dee91e82 DE |
23090 | slot = (struct dwarf2_per_cu_offset_and_type **) |
23091 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
23092 | if (*slot) |
23093 | complaint (&symfile_complaints, | |
23094 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 23095 | to_underlying (die->sect_off)); |
8d749320 SM |
23096 | *slot = XOBNEW (&objfile->objfile_obstack, |
23097 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23098 | **slot = ofs; |
f792889a | 23099 | return type; |
1c379e20 DJ |
23100 | } |
23101 | ||
9c541725 | 23102 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23103 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23104 | |
23105 | static struct type * | |
9c541725 | 23106 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23107 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23108 | { |
dee91e82 | 23109 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 23110 | |
dee91e82 | 23111 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23112 | return NULL; |
1c379e20 | 23113 | |
dee91e82 | 23114 | ofs.per_cu = per_cu; |
9c541725 | 23115 | ofs.sect_off = sect_off; |
9a3c8263 SM |
23116 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
23117 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
23118 | if (slot) |
23119 | return slot->type; | |
23120 | else | |
23121 | return NULL; | |
23122 | } | |
23123 | ||
02142a6c | 23124 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23125 | or return NULL if DIE does not have a saved type. */ |
23126 | ||
23127 | static struct type * | |
23128 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
23129 | { | |
9c541725 | 23130 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
23131 | } |
23132 | ||
10b3939b DJ |
23133 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
23134 | ||
23135 | static void | |
23136 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
23137 | struct dwarf2_per_cu_data *ref_per_cu) | |
23138 | { | |
23139 | void **slot; | |
23140 | ||
23141 | if (cu->dependencies == NULL) | |
23142 | cu->dependencies | |
23143 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
23144 | NULL, &cu->comp_unit_obstack, | |
23145 | hashtab_obstack_allocate, | |
23146 | dummy_obstack_deallocate); | |
23147 | ||
23148 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
23149 | if (*slot == NULL) | |
23150 | *slot = ref_per_cu; | |
23151 | } | |
1c379e20 | 23152 | |
f504f079 DE |
23153 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
23154 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
23155 | cache that we must keep because we are keeping CU. */ |
23156 | ||
10b3939b DJ |
23157 | static int |
23158 | dwarf2_mark_helper (void **slot, void *data) | |
23159 | { | |
23160 | struct dwarf2_per_cu_data *per_cu; | |
23161 | ||
23162 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
23163 | |
23164 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
23165 | reading of the chain. As such dependencies remain valid it is not much | |
23166 | useful to track and undo them during QUIT cleanups. */ | |
23167 | if (per_cu->cu == NULL) | |
23168 | return 1; | |
23169 | ||
10b3939b DJ |
23170 | if (per_cu->cu->mark) |
23171 | return 1; | |
23172 | per_cu->cu->mark = 1; | |
23173 | ||
23174 | if (per_cu->cu->dependencies != NULL) | |
23175 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
23176 | ||
23177 | return 1; | |
23178 | } | |
23179 | ||
f504f079 DE |
23180 | /* Set the mark field in CU and in every other compilation unit in the |
23181 | cache that we must keep because we are keeping CU. */ | |
23182 | ||
ae038cb0 DJ |
23183 | static void |
23184 | dwarf2_mark (struct dwarf2_cu *cu) | |
23185 | { | |
23186 | if (cu->mark) | |
23187 | return; | |
23188 | cu->mark = 1; | |
10b3939b DJ |
23189 | if (cu->dependencies != NULL) |
23190 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
23191 | } |
23192 | ||
23193 | static void | |
23194 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
23195 | { | |
23196 | while (per_cu) | |
23197 | { | |
23198 | per_cu->cu->mark = 0; | |
23199 | per_cu = per_cu->cu->read_in_chain; | |
23200 | } | |
72bf9492 DJ |
23201 | } |
23202 | ||
72bf9492 DJ |
23203 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
23204 | is its offset in .debug_info for this objfile. */ | |
23205 | ||
23206 | static hashval_t | |
23207 | partial_die_hash (const void *item) | |
23208 | { | |
9a3c8263 SM |
23209 | const struct partial_die_info *part_die |
23210 | = (const struct partial_die_info *) item; | |
9a619af0 | 23211 | |
9c541725 | 23212 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
23213 | } |
23214 | ||
23215 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
23216 | are equal if they have the same offset. */ | |
23217 | ||
23218 | static int | |
23219 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
23220 | { | |
9a3c8263 SM |
23221 | const struct partial_die_info *part_die_lhs |
23222 | = (const struct partial_die_info *) item_lhs; | |
23223 | const struct partial_die_info *part_die_rhs | |
23224 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 23225 | |
9c541725 | 23226 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
23227 | } |
23228 | ||
b4f54984 DE |
23229 | static struct cmd_list_element *set_dwarf_cmdlist; |
23230 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
23231 | |
23232 | static void | |
981a3fb3 | 23233 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 23234 | { |
b4f54984 | 23235 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 23236 | gdb_stdout); |
ae038cb0 DJ |
23237 | } |
23238 | ||
23239 | static void | |
981a3fb3 | 23240 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 23241 | { |
b4f54984 | 23242 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
23243 | } |
23244 | ||
4bf44c1c | 23245 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
23246 | |
23247 | static void | |
c1bd65d0 | 23248 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 23249 | { |
9a3c8263 | 23250 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 23251 | int ix; |
8b70b953 | 23252 | |
626f2d1c TT |
23253 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
23254 | cleaning up. */ | |
23255 | dwarf2_per_objfile = NULL; | |
23256 | ||
59b0c7c1 JB |
23257 | for (ix = 0; ix < data->n_comp_units; ++ix) |
23258 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 23259 | |
59b0c7c1 | 23260 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 23261 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
23262 | data->all_type_units[ix]->per_cu.imported_symtabs); |
23263 | xfree (data->all_type_units); | |
95554aad | 23264 | |
8b70b953 | 23265 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
23266 | |
23267 | if (data->dwo_files) | |
23268 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
23269 | if (data->dwp_file) |
23270 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
23271 | |
23272 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
23273 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
23274 | } |
23275 | ||
23276 | \f | |
ae2de4f8 | 23277 | /* The "save gdb-index" command. */ |
9291a0cd | 23278 | |
bc8f2430 JK |
23279 | /* In-memory buffer to prepare data to be written later to a file. */ |
23280 | class data_buf | |
9291a0cd | 23281 | { |
bc8f2430 | 23282 | public: |
bc8f2430 JK |
23283 | /* Copy DATA to the end of the buffer. */ |
23284 | template<typename T> | |
23285 | void append_data (const T &data) | |
23286 | { | |
23287 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
23288 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 23289 | grow (sizeof (data))); |
bc8f2430 | 23290 | } |
b89be57b | 23291 | |
c2f134ac PA |
23292 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
23293 | terminating zero is appended too. */ | |
bc8f2430 JK |
23294 | void append_cstr0 (const char *cstr) |
23295 | { | |
23296 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
23297 | std::copy (cstr, cstr + size, grow (size)); |
23298 | } | |
23299 | ||
23300 | /* Accept a host-format integer in VAL and append it to the buffer | |
23301 | as a target-format integer which is LEN bytes long. */ | |
23302 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
23303 | { | |
23304 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 23305 | } |
9291a0cd | 23306 | |
bc8f2430 JK |
23307 | /* Return the size of the buffer. */ |
23308 | size_t size () const | |
23309 | { | |
23310 | return m_vec.size (); | |
23311 | } | |
23312 | ||
23313 | /* Write the buffer to FILE. */ | |
23314 | void file_write (FILE *file) const | |
23315 | { | |
a81e6d4d PA |
23316 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
23317 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
23318 | } |
23319 | ||
23320 | private: | |
c2f134ac PA |
23321 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
23322 | the start of the new block. */ | |
23323 | gdb_byte *grow (size_t size) | |
23324 | { | |
23325 | m_vec.resize (m_vec.size () + size); | |
23326 | return &*m_vec.end () - size; | |
23327 | } | |
23328 | ||
d5722aa2 | 23329 | gdb::byte_vector m_vec; |
bc8f2430 | 23330 | }; |
9291a0cd TT |
23331 | |
23332 | /* An entry in the symbol table. */ | |
23333 | struct symtab_index_entry | |
23334 | { | |
23335 | /* The name of the symbol. */ | |
23336 | const char *name; | |
23337 | /* The offset of the name in the constant pool. */ | |
23338 | offset_type index_offset; | |
23339 | /* A sorted vector of the indices of all the CUs that hold an object | |
23340 | of this name. */ | |
bc8f2430 | 23341 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
23342 | }; |
23343 | ||
23344 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
23345 | struct mapped_symtab | |
23346 | { | |
bc8f2430 JK |
23347 | mapped_symtab () |
23348 | { | |
23349 | data.resize (1024); | |
23350 | } | |
b89be57b | 23351 | |
bc8f2430 | 23352 | offset_type n_elements = 0; |
4b76cda9 | 23353 | std::vector<symtab_index_entry> data; |
bc8f2430 | 23354 | }; |
9291a0cd | 23355 | |
bc8f2430 | 23356 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
23357 | the slot. |
23358 | ||
23359 | Function is used only during write_hash_table so no index format backward | |
23360 | compatibility is needed. */ | |
b89be57b | 23361 | |
4b76cda9 | 23362 | static symtab_index_entry & |
9291a0cd TT |
23363 | find_slot (struct mapped_symtab *symtab, const char *name) |
23364 | { | |
559a7a62 | 23365 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 23366 | |
bc8f2430 JK |
23367 | index = hash & (symtab->data.size () - 1); |
23368 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
23369 | |
23370 | for (;;) | |
23371 | { | |
4b76cda9 PA |
23372 | if (symtab->data[index].name == NULL |
23373 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
23374 | return symtab->data[index]; |
23375 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
23376 | } |
23377 | } | |
23378 | ||
23379 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 23380 | |
9291a0cd TT |
23381 | static void |
23382 | hash_expand (struct mapped_symtab *symtab) | |
23383 | { | |
bc8f2430 | 23384 | auto old_entries = std::move (symtab->data); |
9291a0cd | 23385 | |
bc8f2430 JK |
23386 | symtab->data.clear (); |
23387 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 23388 | |
bc8f2430 | 23389 | for (auto &it : old_entries) |
4b76cda9 | 23390 | if (it.name != NULL) |
bc8f2430 | 23391 | { |
4b76cda9 | 23392 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
23393 | ref = std::move (it); |
23394 | } | |
9291a0cd TT |
23395 | } |
23396 | ||
156942c7 DE |
23397 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
23398 | CU_INDEX is the index of the CU in which the symbol appears. | |
23399 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 23400 | |
9291a0cd TT |
23401 | static void |
23402 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 23403 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
23404 | offset_type cu_index) |
23405 | { | |
156942c7 | 23406 | offset_type cu_index_and_attrs; |
9291a0cd TT |
23407 | |
23408 | ++symtab->n_elements; | |
bc8f2430 | 23409 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
23410 | hash_expand (symtab); |
23411 | ||
4b76cda9 PA |
23412 | symtab_index_entry &slot = find_slot (symtab, name); |
23413 | if (slot.name == NULL) | |
9291a0cd | 23414 | { |
4b76cda9 | 23415 | slot.name = name; |
156942c7 | 23416 | /* index_offset is set later. */ |
9291a0cd | 23417 | } |
156942c7 DE |
23418 | |
23419 | cu_index_and_attrs = 0; | |
23420 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
23421 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
23422 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
23423 | ||
23424 | /* We don't want to record an index value twice as we want to avoid the | |
23425 | duplication. | |
23426 | We process all global symbols and then all static symbols | |
23427 | (which would allow us to avoid the duplication by only having to check | |
23428 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
23429 | To keep things simple we don't worry about the duplication here and | |
23430 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 23431 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
23432 | } |
23433 | ||
23434 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
23435 | ||
23436 | static void | |
23437 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
23438 | { | |
4b76cda9 | 23439 | for (auto &entry : symtab->data) |
156942c7 | 23440 | { |
4b76cda9 | 23441 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 23442 | { |
4b76cda9 | 23443 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
23444 | std::sort (cu_indices.begin (), cu_indices.end ()); |
23445 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
23446 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
23447 | } |
23448 | } | |
9291a0cd TT |
23449 | } |
23450 | ||
bc8f2430 JK |
23451 | /* A form of 'const char *' suitable for container keys. Only the |
23452 | pointer is stored. The strings themselves are compared, not the | |
23453 | pointers. */ | |
23454 | class c_str_view | |
9291a0cd | 23455 | { |
bc8f2430 JK |
23456 | public: |
23457 | c_str_view (const char *cstr) | |
23458 | : m_cstr (cstr) | |
23459 | {} | |
9291a0cd | 23460 | |
bc8f2430 JK |
23461 | bool operator== (const c_str_view &other) const |
23462 | { | |
23463 | return strcmp (m_cstr, other.m_cstr) == 0; | |
23464 | } | |
9291a0cd | 23465 | |
bc8f2430 JK |
23466 | private: |
23467 | friend class c_str_view_hasher; | |
23468 | const char *const m_cstr; | |
23469 | }; | |
9291a0cd | 23470 | |
bc8f2430 JK |
23471 | /* A std::unordered_map::hasher for c_str_view that uses the right |
23472 | hash function for strings in a mapped index. */ | |
23473 | class c_str_view_hasher | |
23474 | { | |
23475 | public: | |
23476 | size_t operator () (const c_str_view &x) const | |
23477 | { | |
23478 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
23479 | } | |
23480 | }; | |
b89be57b | 23481 | |
bc8f2430 JK |
23482 | /* A std::unordered_map::hasher for std::vector<>. */ |
23483 | template<typename T> | |
23484 | class vector_hasher | |
9291a0cd | 23485 | { |
bc8f2430 JK |
23486 | public: |
23487 | size_t operator () (const std::vector<T> &key) const | |
23488 | { | |
23489 | return iterative_hash (key.data (), | |
23490 | sizeof (key.front ()) * key.size (), 0); | |
23491 | } | |
23492 | }; | |
9291a0cd | 23493 | |
bc8f2430 JK |
23494 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
23495 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 23496 | |
bc8f2430 JK |
23497 | static void |
23498 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
23499 | { | |
23500 | { | |
23501 | /* Elements are sorted vectors of the indices of all the CUs that | |
23502 | hold an object of this name. */ | |
23503 | std::unordered_map<std::vector<offset_type>, offset_type, | |
23504 | vector_hasher<offset_type>> | |
23505 | symbol_hash_table; | |
23506 | ||
23507 | /* We add all the index vectors to the constant pool first, to | |
23508 | ensure alignment is ok. */ | |
4b76cda9 | 23509 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 23510 | { |
4b76cda9 | 23511 | if (entry.name == NULL) |
bc8f2430 | 23512 | continue; |
4b76cda9 | 23513 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
23514 | |
23515 | /* Finding before inserting is faster than always trying to | |
23516 | insert, because inserting always allocates a node, does the | |
23517 | lookup, and then destroys the new node if another node | |
23518 | already had the same key. C++17 try_emplace will avoid | |
23519 | this. */ | |
23520 | const auto found | |
4b76cda9 | 23521 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
23522 | if (found != symbol_hash_table.end ()) |
23523 | { | |
4b76cda9 | 23524 | entry.index_offset = found->second; |
70a1152b PA |
23525 | continue; |
23526 | } | |
23527 | ||
4b76cda9 PA |
23528 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
23529 | entry.index_offset = cpool.size (); | |
23530 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
23531 | for (const auto index : entry.cu_indices) | |
23532 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
23533 | } |
23534 | } | |
9291a0cd TT |
23535 | |
23536 | /* Now write out the hash table. */ | |
bc8f2430 | 23537 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 23538 | for (const auto &entry : symtab->data) |
9291a0cd TT |
23539 | { |
23540 | offset_type str_off, vec_off; | |
23541 | ||
4b76cda9 | 23542 | if (entry.name != NULL) |
9291a0cd | 23543 | { |
4b76cda9 | 23544 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 23545 | if (insertpair.second) |
4b76cda9 | 23546 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 23547 | str_off = insertpair.first->second; |
4b76cda9 | 23548 | vec_off = entry.index_offset; |
9291a0cd TT |
23549 | } |
23550 | else | |
23551 | { | |
23552 | /* While 0 is a valid constant pool index, it is not valid | |
23553 | to have 0 for both offsets. */ | |
23554 | str_off = 0; | |
23555 | vec_off = 0; | |
23556 | } | |
23557 | ||
bc8f2430 JK |
23558 | output.append_data (MAYBE_SWAP (str_off)); |
23559 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 23560 | } |
9291a0cd TT |
23561 | } |
23562 | ||
bc8f2430 | 23563 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
23564 | |
23565 | /* Helper struct for building the address table. */ | |
23566 | struct addrmap_index_data | |
23567 | { | |
bc8f2430 JK |
23568 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
23569 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
23570 | {} | |
23571 | ||
0a5429f6 | 23572 | struct objfile *objfile; |
bc8f2430 JK |
23573 | data_buf &addr_vec; |
23574 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
23575 | |
23576 | /* Non-zero if the previous_* fields are valid. | |
23577 | We can't write an entry until we see the next entry (since it is only then | |
23578 | that we know the end of the entry). */ | |
23579 | int previous_valid; | |
23580 | /* Index of the CU in the table of all CUs in the index file. */ | |
23581 | unsigned int previous_cu_index; | |
0963b4bd | 23582 | /* Start address of the CU. */ |
0a5429f6 DE |
23583 | CORE_ADDR previous_cu_start; |
23584 | }; | |
23585 | ||
bc8f2430 | 23586 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 23587 | |
9291a0cd | 23588 | static void |
bc8f2430 | 23589 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 23590 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 23591 | { |
9291a0cd TT |
23592 | CORE_ADDR baseaddr; |
23593 | ||
23594 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23595 | ||
c2f134ac PA |
23596 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
23597 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 23598 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
23599 | } |
23600 | ||
23601 | /* Worker function for traversing an addrmap to build the address table. */ | |
23602 | ||
23603 | static int | |
23604 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
23605 | { | |
9a3c8263 SM |
23606 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
23607 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
23608 | |
23609 | if (data->previous_valid) | |
bc8f2430 | 23610 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
23611 | data->previous_cu_start, start_addr, |
23612 | data->previous_cu_index); | |
23613 | ||
23614 | data->previous_cu_start = start_addr; | |
23615 | if (pst != NULL) | |
23616 | { | |
bc8f2430 JK |
23617 | const auto it = data->cu_index_htab.find (pst); |
23618 | gdb_assert (it != data->cu_index_htab.cend ()); | |
23619 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
23620 | data->previous_valid = 1; |
23621 | } | |
23622 | else | |
bc8f2430 | 23623 | data->previous_valid = 0; |
0a5429f6 DE |
23624 | |
23625 | return 0; | |
23626 | } | |
23627 | ||
bc8f2430 | 23628 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
23629 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
23630 | in the index file. */ | |
23631 | ||
23632 | static void | |
bc8f2430 JK |
23633 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
23634 | psym_index_map &cu_index_htab) | |
0a5429f6 | 23635 | { |
bc8f2430 | 23636 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
23637 | |
23638 | /* When writing the address table, we have to cope with the fact that | |
23639 | the addrmap iterator only provides the start of a region; we have to | |
23640 | wait until the next invocation to get the start of the next region. */ | |
23641 | ||
23642 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
23643 | addrmap_index_data.previous_valid = 0; |
23644 | ||
23645 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
23646 | &addrmap_index_data); | |
23647 | ||
23648 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
23649 | is valid, but we should still handle it. | |
23650 | The end address is recorded as the start of the next region, but that | |
23651 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
23652 | anyway. */ | |
23653 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 23654 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
23655 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
23656 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
23657 | } |
23658 | ||
156942c7 DE |
23659 | /* Return the symbol kind of PSYM. */ |
23660 | ||
23661 | static gdb_index_symbol_kind | |
23662 | symbol_kind (struct partial_symbol *psym) | |
23663 | { | |
23664 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
23665 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
23666 | ||
23667 | switch (domain) | |
23668 | { | |
23669 | case VAR_DOMAIN: | |
23670 | switch (aclass) | |
23671 | { | |
23672 | case LOC_BLOCK: | |
23673 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
23674 | case LOC_TYPEDEF: | |
23675 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23676 | case LOC_COMPUTED: | |
23677 | case LOC_CONST_BYTES: | |
23678 | case LOC_OPTIMIZED_OUT: | |
23679 | case LOC_STATIC: | |
23680 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23681 | case LOC_CONST: | |
23682 | /* Note: It's currently impossible to recognize psyms as enum values | |
23683 | short of reading the type info. For now punt. */ | |
23684 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23685 | default: | |
23686 | /* There are other LOC_FOO values that one might want to classify | |
23687 | as variables, but dwarf2read.c doesn't currently use them. */ | |
23688 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23689 | } | |
23690 | case STRUCT_DOMAIN: | |
23691 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23692 | default: | |
23693 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23694 | } | |
23695 | } | |
23696 | ||
9291a0cd | 23697 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 23698 | |
9291a0cd TT |
23699 | static void |
23700 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 23701 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
23702 | struct partial_symbol **psymp, |
23703 | int count, | |
987d643c TT |
23704 | offset_type cu_index, |
23705 | int is_static) | |
9291a0cd TT |
23706 | { |
23707 | for (; count-- > 0; ++psymp) | |
23708 | { | |
156942c7 | 23709 | struct partial_symbol *psym = *psymp; |
987d643c | 23710 | |
156942c7 | 23711 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 23712 | error (_("Ada is not currently supported by the index")); |
987d643c | 23713 | |
987d643c | 23714 | /* Only add a given psymbol once. */ |
bc8f2430 | 23715 | if (psyms_seen.insert (psym).second) |
987d643c | 23716 | { |
156942c7 DE |
23717 | gdb_index_symbol_kind kind = symbol_kind (psym); |
23718 | ||
156942c7 DE |
23719 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
23720 | is_static, kind, cu_index); | |
987d643c | 23721 | } |
9291a0cd TT |
23722 | } |
23723 | } | |
23724 | ||
1fd400ff TT |
23725 | /* A helper struct used when iterating over debug_types. */ |
23726 | struct signatured_type_index_data | |
23727 | { | |
bc8f2430 JK |
23728 | signatured_type_index_data (data_buf &types_list_, |
23729 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
23730 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
23731 | {} | |
23732 | ||
1fd400ff TT |
23733 | struct objfile *objfile; |
23734 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
23735 | data_buf &types_list; |
23736 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
23737 | int cu_index; |
23738 | }; | |
23739 | ||
23740 | /* A helper function that writes a single signatured_type to an | |
23741 | obstack. */ | |
b89be57b | 23742 | |
1fd400ff TT |
23743 | static int |
23744 | write_one_signatured_type (void **slot, void *d) | |
23745 | { | |
9a3c8263 SM |
23746 | struct signatured_type_index_data *info |
23747 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 23748 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 23749 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
23750 | |
23751 | write_psymbols (info->symtab, | |
987d643c | 23752 | info->psyms_seen, |
af5bf4ad | 23753 | &info->objfile->global_psymbols[psymtab->globals_offset], |
987d643c TT |
23754 | psymtab->n_global_syms, info->cu_index, |
23755 | 0); | |
1fd400ff | 23756 | write_psymbols (info->symtab, |
987d643c | 23757 | info->psyms_seen, |
af5bf4ad | 23758 | &info->objfile->static_psymbols[psymtab->statics_offset], |
987d643c TT |
23759 | psymtab->n_static_syms, info->cu_index, |
23760 | 1); | |
1fd400ff | 23761 | |
c2f134ac PA |
23762 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
23763 | to_underlying (entry->per_cu.sect_off)); | |
23764 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
23765 | to_underlying (entry->type_offset_in_tu)); | |
23766 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
23767 | |
23768 | ++info->cu_index; | |
23769 | ||
23770 | return 1; | |
23771 | } | |
23772 | ||
e8f8bcb3 PA |
23773 | /* Recurse into all "included" dependencies and count their symbols as |
23774 | if they appeared in this psymtab. */ | |
23775 | ||
23776 | static void | |
23777 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
23778 | size_t &psyms_seen) | |
23779 | { | |
23780 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
23781 | if (psymtab->dependencies[i]->user != NULL) | |
23782 | recursively_count_psymbols (psymtab->dependencies[i], | |
23783 | psyms_seen); | |
23784 | ||
23785 | psyms_seen += psymtab->n_global_syms; | |
23786 | psyms_seen += psymtab->n_static_syms; | |
23787 | } | |
23788 | ||
95554aad TT |
23789 | /* Recurse into all "included" dependencies and write their symbols as |
23790 | if they appeared in this psymtab. */ | |
23791 | ||
23792 | static void | |
23793 | recursively_write_psymbols (struct objfile *objfile, | |
23794 | struct partial_symtab *psymtab, | |
23795 | struct mapped_symtab *symtab, | |
bc8f2430 | 23796 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
23797 | offset_type cu_index) |
23798 | { | |
23799 | int i; | |
23800 | ||
23801 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
23802 | if (psymtab->dependencies[i]->user != NULL) | |
23803 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
23804 | symtab, psyms_seen, cu_index); | |
23805 | ||
23806 | write_psymbols (symtab, | |
23807 | psyms_seen, | |
af5bf4ad | 23808 | &objfile->global_psymbols[psymtab->globals_offset], |
95554aad TT |
23809 | psymtab->n_global_syms, cu_index, |
23810 | 0); | |
23811 | write_psymbols (symtab, | |
23812 | psyms_seen, | |
af5bf4ad | 23813 | &objfile->static_psymbols[psymtab->statics_offset], |
95554aad TT |
23814 | psymtab->n_static_syms, cu_index, |
23815 | 1); | |
23816 | } | |
23817 | ||
9291a0cd | 23818 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 23819 | |
9291a0cd TT |
23820 | static void |
23821 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
23822 | { | |
9291a0cd TT |
23823 | if (dwarf2_per_objfile->using_index) |
23824 | error (_("Cannot use an index to create the index")); | |
23825 | ||
8b70b953 TT |
23826 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
23827 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
23828 | ||
260b681b DE |
23829 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
23830 | return; | |
23831 | ||
bc8f2430 | 23832 | struct stat st; |
4262abfb JK |
23833 | if (stat (objfile_name (objfile), &st) < 0) |
23834 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 23835 | |
bc8f2430 JK |
23836 | std::string filename (std::string (dir) + SLASH_STRING |
23837 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 23838 | |
d419f42d | 23839 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 23840 | if (!out_file) |
bc8f2430 | 23841 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 23842 | |
16b7a719 PA |
23843 | /* Order matters here; we want FILE to be closed before FILENAME is |
23844 | unlinked, because on MS-Windows one cannot delete a file that is | |
23845 | still open. (Don't call anything here that might throw until | |
23846 | file_closer is created.) */ | |
bc8f2430 | 23847 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 23848 | gdb_file_up close_out_file (out_file); |
9291a0cd | 23849 | |
bc8f2430 JK |
23850 | mapped_symtab symtab; |
23851 | data_buf cu_list; | |
987d643c | 23852 | |
0a5429f6 DE |
23853 | /* While we're scanning CU's create a table that maps a psymtab pointer |
23854 | (which is what addrmap records) to its index (which is what is recorded | |
23855 | in the index file). This will later be needed to write the address | |
23856 | table. */ | |
bc8f2430 JK |
23857 | psym_index_map cu_index_htab; |
23858 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
23859 | |
23860 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
23861 | work here. Also, the debug_types entries do not appear in |
23862 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
23863 | |
23864 | /* The psyms_seen set is potentially going to be largish (~40k | |
23865 | elements when indexing a -g3 build of GDB itself). Estimate the | |
23866 | number of elements in order to avoid too many rehashes, which | |
23867 | require rebuilding buckets and thus many trips to | |
23868 | malloc/free. */ | |
23869 | size_t psyms_count = 0; | |
23870 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
23871 | { | |
23872 | struct dwarf2_per_cu_data *per_cu | |
23873 | = dwarf2_per_objfile->all_comp_units[i]; | |
23874 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
23875 | ||
23876 | if (psymtab != NULL && psymtab->user == NULL) | |
23877 | recursively_count_psymbols (psymtab, psyms_count); | |
23878 | } | |
23879 | /* Generating an index for gdb itself shows a ratio of | |
23880 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
23881 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 23882 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 23883 | { |
3e43a32a MS |
23884 | struct dwarf2_per_cu_data *per_cu |
23885 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 23886 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 23887 | |
92fac807 JK |
23888 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
23889 | It may be referenced from a local scope but in such case it does not | |
23890 | need to be present in .gdb_index. */ | |
23891 | if (psymtab == NULL) | |
23892 | continue; | |
23893 | ||
95554aad | 23894 | if (psymtab->user == NULL) |
bc8f2430 JK |
23895 | recursively_write_psymbols (objfile, psymtab, &symtab, |
23896 | psyms_seen, i); | |
9291a0cd | 23897 | |
bc8f2430 JK |
23898 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
23899 | gdb_assert (insertpair.second); | |
9291a0cd | 23900 | |
c2f134ac PA |
23901 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
23902 | to_underlying (per_cu->sect_off)); | |
23903 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
23904 | } |
23905 | ||
0a5429f6 | 23906 | /* Dump the address map. */ |
bc8f2430 JK |
23907 | data_buf addr_vec; |
23908 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 23909 | |
1fd400ff | 23910 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 23911 | data_buf types_cu_list; |
1fd400ff TT |
23912 | if (dwarf2_per_objfile->signatured_types) |
23913 | { | |
bc8f2430 JK |
23914 | signatured_type_index_data sig_data (types_cu_list, |
23915 | psyms_seen); | |
1fd400ff TT |
23916 | |
23917 | sig_data.objfile = objfile; | |
bc8f2430 | 23918 | sig_data.symtab = &symtab; |
1fd400ff TT |
23919 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
23920 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
23921 | write_one_signatured_type, &sig_data); | |
23922 | } | |
23923 | ||
156942c7 DE |
23924 | /* Now that we've processed all symbols we can shrink their cu_indices |
23925 | lists. */ | |
bc8f2430 | 23926 | uniquify_cu_indices (&symtab); |
156942c7 | 23927 | |
bc8f2430 JK |
23928 | data_buf symtab_vec, constant_pool; |
23929 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 23930 | |
bc8f2430 JK |
23931 | data_buf contents; |
23932 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
23933 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
23934 | |
23935 | /* The version number. */ | |
bc8f2430 | 23936 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
23937 | |
23938 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
23939 | contents.append_data (MAYBE_SWAP (total_len)); |
23940 | total_len += cu_list.size (); | |
9291a0cd | 23941 | |
1fd400ff | 23942 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
23943 | contents.append_data (MAYBE_SWAP (total_len)); |
23944 | total_len += types_cu_list.size (); | |
1fd400ff | 23945 | |
9291a0cd | 23946 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
23947 | contents.append_data (MAYBE_SWAP (total_len)); |
23948 | total_len += addr_vec.size (); | |
9291a0cd TT |
23949 | |
23950 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
23951 | contents.append_data (MAYBE_SWAP (total_len)); |
23952 | total_len += symtab_vec.size (); | |
9291a0cd TT |
23953 | |
23954 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
23955 | contents.append_data (MAYBE_SWAP (total_len)); |
23956 | total_len += constant_pool.size (); | |
9291a0cd | 23957 | |
bc8f2430 | 23958 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 23959 | |
bc8f2430 JK |
23960 | contents.file_write (out_file); |
23961 | cu_list.file_write (out_file); | |
23962 | types_cu_list.file_write (out_file); | |
23963 | addr_vec.file_write (out_file); | |
23964 | symtab_vec.file_write (out_file); | |
23965 | constant_pool.file_write (out_file); | |
9291a0cd | 23966 | |
bef155c3 TT |
23967 | /* We want to keep the file. */ |
23968 | unlink_file.keep (); | |
9291a0cd TT |
23969 | } |
23970 | ||
90476074 TT |
23971 | /* Implementation of the `save gdb-index' command. |
23972 | ||
23973 | Note that the file format used by this command is documented in the | |
23974 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 23975 | |
9291a0cd | 23976 | static void |
8384c356 | 23977 | save_gdb_index_command (const char *arg, int from_tty) |
9291a0cd TT |
23978 | { |
23979 | struct objfile *objfile; | |
23980 | ||
23981 | if (!arg || !*arg) | |
96d19272 | 23982 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
23983 | |
23984 | ALL_OBJFILES (objfile) | |
23985 | { | |
23986 | struct stat st; | |
23987 | ||
23988 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 23989 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
23990 | continue; |
23991 | ||
9a3c8263 SM |
23992 | dwarf2_per_objfile |
23993 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23994 | dwarf2_objfile_data_key); | |
9291a0cd TT |
23995 | if (dwarf2_per_objfile) |
23996 | { | |
9291a0cd | 23997 | |
492d29ea | 23998 | TRY |
9291a0cd TT |
23999 | { |
24000 | write_psymtabs_to_index (objfile, arg); | |
24001 | } | |
492d29ea PA |
24002 | CATCH (except, RETURN_MASK_ERROR) |
24003 | { | |
24004 | exception_fprintf (gdb_stderr, except, | |
24005 | _("Error while writing index for `%s': "), | |
24006 | objfile_name (objfile)); | |
24007 | } | |
24008 | END_CATCH | |
9291a0cd TT |
24009 | } |
24010 | } | |
dce234bc PP |
24011 | } |
24012 | ||
9291a0cd TT |
24013 | \f |
24014 | ||
b4f54984 | 24015 | int dwarf_always_disassemble; |
9eae7c52 TT |
24016 | |
24017 | static void | |
b4f54984 DE |
24018 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24019 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24020 | { |
3e43a32a MS |
24021 | fprintf_filtered (file, |
24022 | _("Whether to always disassemble " | |
24023 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24024 | value); |
24025 | } | |
24026 | ||
900e11f9 JK |
24027 | static void |
24028 | show_check_physname (struct ui_file *file, int from_tty, | |
24029 | struct cmd_list_element *c, const char *value) | |
24030 | { | |
24031 | fprintf_filtered (file, | |
24032 | _("Whether to check \"physname\" is %s.\n"), | |
24033 | value); | |
24034 | } | |
24035 | ||
6502dd73 DJ |
24036 | void |
24037 | _initialize_dwarf2_read (void) | |
24038 | { | |
96d19272 JK |
24039 | struct cmd_list_element *c; |
24040 | ||
dce234bc | 24041 | dwarf2_objfile_data_key |
c1bd65d0 | 24042 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24043 | |
b4f54984 DE |
24044 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24045 | Set DWARF specific variables.\n\ | |
24046 | Configure DWARF variables such as the cache size"), | |
24047 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24048 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24049 | ||
b4f54984 DE |
24050 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24051 | Show DWARF specific variables\n\ | |
24052 | Show DWARF variables such as the cache size"), | |
24053 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24054 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24055 | ||
24056 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24057 | &dwarf_max_cache_age, _("\ |
24058 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24059 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24060 | A higher limit means that cached compilation units will be stored\n\ |
24061 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24062 | caching, which can slow down startup."), | |
2c5b56ce | 24063 | NULL, |
b4f54984 DE |
24064 | show_dwarf_max_cache_age, |
24065 | &set_dwarf_cmdlist, | |
24066 | &show_dwarf_cmdlist); | |
d97bc12b | 24067 | |
9eae7c52 | 24068 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24069 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24070 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24071 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24072 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24073 | syntax. When disabled, expressions will be printed in a more\n\ | |
24074 | conversational style, when possible."), | |
24075 | NULL, | |
b4f54984 DE |
24076 | show_dwarf_always_disassemble, |
24077 | &set_dwarf_cmdlist, | |
24078 | &show_dwarf_cmdlist); | |
24079 | ||
24080 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
24081 | Set debugging of the DWARF reader."), _("\ | |
24082 | Show debugging of the DWARF reader."), _("\ | |
24083 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
24084 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
24085 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
24086 | NULL, |
24087 | NULL, | |
24088 | &setdebuglist, &showdebuglist); | |
24089 | ||
b4f54984 DE |
24090 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24091 | Set debugging of the DWARF DIE reader."), _("\ | |
24092 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
24093 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
24094 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
24095 | NULL, |
24096 | NULL, | |
24097 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24098 | |
27e0867f DE |
24099 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24100 | Set debugging of the dwarf line reader."), _("\ | |
24101 | Show debugging of the dwarf line reader."), _("\ | |
24102 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24103 | A value of 1 (one) provides basic information.\n\ | |
24104 | A value greater than 1 provides more verbose information."), | |
24105 | NULL, | |
24106 | NULL, | |
24107 | &setdebuglist, &showdebuglist); | |
24108 | ||
900e11f9 JK |
24109 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24110 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24111 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24112 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24113 | the demangler."), | |
24114 | NULL, show_check_physname, | |
24115 | &setdebuglist, &showdebuglist); | |
24116 | ||
e615022a DE |
24117 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24118 | no_class, &use_deprecated_index_sections, _("\ | |
24119 | Set whether to use deprecated gdb_index sections."), _("\ | |
24120 | Show whether to use deprecated gdb_index sections."), _("\ | |
24121 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24122 | Normally they are ignored either because of a missing feature or\n\ | |
24123 | performance issue.\n\ | |
24124 | Warning: This option must be enabled before gdb reads the file."), | |
24125 | NULL, | |
24126 | NULL, | |
24127 | &setlist, &showlist); | |
24128 | ||
96d19272 | 24129 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 24130 | _("\ |
fc1a9d6e | 24131 | Save a gdb-index file.\n\ |
11570e71 | 24132 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
24133 | &save_cmdlist); |
24134 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
24135 | |
24136 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24137 | &dwarf2_locexpr_funcs); | |
24138 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24139 | &dwarf2_loclist_funcs); | |
24140 | ||
24141 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24142 | &dwarf2_block_frame_base_locexpr_funcs); | |
24143 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24144 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 24145 | } |